1 /* Xtensa-specific support for 32-bit ELF.
2 Copyright (C) 2003-2017 Free Software Foundation, Inc.
4 This file is part of BFD, the Binary File Descriptor library.
6 This program is free software; you can redistribute it and/or
7 modify it under the terms of the GNU General Public License as
8 published by the Free Software Foundation; either version 3 of the
9 License, or (at your option) any later version.
11 This program is distributed in the hope that it will be useful, but
12 WITHOUT ANY WARRANTY; without even the implied warranty of
13 MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
14 General Public License for more details.
16 You should have received a copy of the GNU General Public License
17 along with this program; if not, write to the Free Software
18 Foundation, Inc., 51 Franklin Street - Fifth Floor, Boston, MA
30 #include "elf/xtensa.h"
31 #include "splay-tree.h"
32 #include "xtensa-isa.h"
33 #include "xtensa-config.h"
35 #define XTENSA_NO_NOP_REMOVAL 0
37 /* Local helper functions. */
39 static bfd_boolean add_extra_plt_sections (struct bfd_link_info *, int);
40 static char *vsprint_msg (const char *, const char *, int, ...) ATTRIBUTE_PRINTF(2,4);
41 static bfd_reloc_status_type bfd_elf_xtensa_reloc
42 (bfd *, arelent *, asymbol *, void *, asection *, bfd *, char **);
43 static bfd_boolean do_fix_for_relocatable_link
44 (Elf_Internal_Rela *, bfd *, asection *, bfd_byte *);
45 static void do_fix_for_final_link
46 (Elf_Internal_Rela *, bfd *, asection *, bfd_byte *, bfd_vma *);
48 /* Local functions to handle Xtensa configurability. */
50 static bfd_boolean is_indirect_call_opcode (xtensa_opcode);
51 static bfd_boolean is_direct_call_opcode (xtensa_opcode);
52 static bfd_boolean is_windowed_call_opcode (xtensa_opcode);
53 static xtensa_opcode get_const16_opcode (void);
54 static xtensa_opcode get_l32r_opcode (void);
55 static bfd_vma l32r_offset (bfd_vma, bfd_vma);
56 static int get_relocation_opnd (xtensa_opcode, int);
57 static int get_relocation_slot (int);
58 static xtensa_opcode get_relocation_opcode
59 (bfd *, asection *, bfd_byte *, Elf_Internal_Rela *);
60 static bfd_boolean is_l32r_relocation
61 (bfd *, asection *, bfd_byte *, Elf_Internal_Rela *);
62 static bfd_boolean is_alt_relocation (int);
63 static bfd_boolean is_operand_relocation (int);
64 static bfd_size_type insn_decode_len
65 (bfd_byte *, bfd_size_type, bfd_size_type);
66 static xtensa_opcode insn_decode_opcode
67 (bfd_byte *, bfd_size_type, bfd_size_type, int);
68 static bfd_boolean check_branch_target_aligned
69 (bfd_byte *, bfd_size_type, bfd_vma, bfd_vma);
70 static bfd_boolean check_loop_aligned
71 (bfd_byte *, bfd_size_type, bfd_vma, bfd_vma);
72 static bfd_boolean check_branch_target_aligned_address (bfd_vma, int);
73 static bfd_size_type get_asm_simplify_size
74 (bfd_byte *, bfd_size_type, bfd_size_type);
76 /* Functions for link-time code simplifications. */
78 static bfd_reloc_status_type elf_xtensa_do_asm_simplify
79 (bfd_byte *, bfd_vma, bfd_vma, char **);
80 static bfd_reloc_status_type contract_asm_expansion
81 (bfd_byte *, bfd_vma, Elf_Internal_Rela *, char **);
82 static xtensa_opcode swap_callx_for_call_opcode (xtensa_opcode);
83 static xtensa_opcode get_expanded_call_opcode (bfd_byte *, int, bfd_boolean *);
85 /* Access to internal relocations, section contents and symbols. */
87 static Elf_Internal_Rela *retrieve_internal_relocs
88 (bfd *, asection *, bfd_boolean);
89 static void pin_internal_relocs (asection *, Elf_Internal_Rela *);
90 static void release_internal_relocs (asection *, Elf_Internal_Rela *);
91 static bfd_byte *retrieve_contents (bfd *, asection *, bfd_boolean);
92 static void pin_contents (asection *, bfd_byte *);
93 static void release_contents (asection *, bfd_byte *);
94 static Elf_Internal_Sym *retrieve_local_syms (bfd *);
96 /* Miscellaneous utility functions. */
98 static asection *elf_xtensa_get_plt_section (struct bfd_link_info *, int);
99 static asection *elf_xtensa_get_gotplt_section (struct bfd_link_info *, int);
100 static asection *get_elf_r_symndx_section (bfd *, unsigned long);
101 static struct elf_link_hash_entry *get_elf_r_symndx_hash_entry
102 (bfd *, unsigned long);
103 static bfd_vma get_elf_r_symndx_offset (bfd *, unsigned long);
104 static bfd_boolean is_reloc_sym_weak (bfd *, Elf_Internal_Rela *);
105 static bfd_boolean pcrel_reloc_fits (xtensa_opcode, int, bfd_vma, bfd_vma);
106 static bfd_boolean xtensa_is_property_section (asection *);
107 static bfd_boolean xtensa_is_insntable_section (asection *);
108 static bfd_boolean xtensa_is_littable_section (asection *);
109 static bfd_boolean xtensa_is_proptable_section (asection *);
110 static int internal_reloc_compare (const void *, const void *);
111 static int internal_reloc_matches (const void *, const void *);
112 static asection *xtensa_get_property_section (asection *, const char *);
113 static flagword xtensa_get_property_predef_flags (asection *);
115 /* Other functions called directly by the linker. */
117 typedef void (*deps_callback_t)
118 (asection *, bfd_vma, asection *, bfd_vma, void *);
119 extern bfd_boolean xtensa_callback_required_dependence
120 (bfd *, asection *, struct bfd_link_info *, deps_callback_t, void *);
123 /* Globally visible flag for choosing size optimization of NOP removal
124 instead of branch-target-aware minimization for NOP removal.
125 When nonzero, narrow all instructions and remove all NOPs possible
126 around longcall expansions. */
128 int elf32xtensa_size_opt;
131 /* The "new_section_hook" is used to set up a per-section
132 "xtensa_relax_info" data structure with additional information used
133 during relaxation. */
135 typedef struct xtensa_relax_info_struct xtensa_relax_info;
138 /* The GNU tools do not easily allow extending interfaces to pass around
139 the pointer to the Xtensa ISA information, so instead we add a global
140 variable here (in BFD) that can be used by any of the tools that need
143 xtensa_isa xtensa_default_isa;
146 /* When this is true, relocations may have been modified to refer to
147 symbols from other input files. The per-section list of "fix"
148 records needs to be checked when resolving relocations. */
150 static bfd_boolean relaxing_section = FALSE;
152 /* When this is true, during final links, literals that cannot be
153 coalesced and their relocations may be moved to other sections. */
155 int elf32xtensa_no_literal_movement = 1;
157 /* Rename one of the generic section flags to better document how it
159 /* Whether relocations have been processed. */
160 #define reloc_done sec_flg0
162 static reloc_howto_type elf_howto_table[] =
164 HOWTO (R_XTENSA_NONE, 0, 3, 0, FALSE, 0, complain_overflow_dont,
165 bfd_elf_xtensa_reloc, "R_XTENSA_NONE",
167 HOWTO (R_XTENSA_32, 0, 2, 32, FALSE, 0, complain_overflow_bitfield,
168 bfd_elf_xtensa_reloc, "R_XTENSA_32",
169 TRUE, 0xffffffff, 0xffffffff, FALSE),
171 /* Replace a 32-bit value with a value from the runtime linker (only
172 used by linker-generated stub functions). The r_addend value is
173 special: 1 means to substitute a pointer to the runtime linker's
174 dynamic resolver function; 2 means to substitute the link map for
175 the shared object. */
176 HOWTO (R_XTENSA_RTLD, 0, 2, 32, FALSE, 0, complain_overflow_dont,
177 NULL, "R_XTENSA_RTLD", FALSE, 0, 0, FALSE),
179 HOWTO (R_XTENSA_GLOB_DAT, 0, 2, 32, FALSE, 0, complain_overflow_bitfield,
180 bfd_elf_generic_reloc, "R_XTENSA_GLOB_DAT",
181 FALSE, 0, 0xffffffff, FALSE),
182 HOWTO (R_XTENSA_JMP_SLOT, 0, 2, 32, FALSE, 0, complain_overflow_bitfield,
183 bfd_elf_generic_reloc, "R_XTENSA_JMP_SLOT",
184 FALSE, 0, 0xffffffff, FALSE),
185 HOWTO (R_XTENSA_RELATIVE, 0, 2, 32, FALSE, 0, complain_overflow_bitfield,
186 bfd_elf_generic_reloc, "R_XTENSA_RELATIVE",
187 FALSE, 0, 0xffffffff, FALSE),
188 HOWTO (R_XTENSA_PLT, 0, 2, 32, FALSE, 0, complain_overflow_bitfield,
189 bfd_elf_xtensa_reloc, "R_XTENSA_PLT",
190 FALSE, 0, 0xffffffff, FALSE),
194 /* Old relocations for backward compatibility. */
195 HOWTO (R_XTENSA_OP0, 0, 0, 0, TRUE, 0, complain_overflow_dont,
196 bfd_elf_xtensa_reloc, "R_XTENSA_OP0", FALSE, 0, 0, TRUE),
197 HOWTO (R_XTENSA_OP1, 0, 0, 0, TRUE, 0, complain_overflow_dont,
198 bfd_elf_xtensa_reloc, "R_XTENSA_OP1", FALSE, 0, 0, TRUE),
199 HOWTO (R_XTENSA_OP2, 0, 0, 0, TRUE, 0, complain_overflow_dont,
200 bfd_elf_xtensa_reloc, "R_XTENSA_OP2", FALSE, 0, 0, TRUE),
202 /* Assembly auto-expansion. */
203 HOWTO (R_XTENSA_ASM_EXPAND, 0, 0, 0, TRUE, 0, complain_overflow_dont,
204 bfd_elf_xtensa_reloc, "R_XTENSA_ASM_EXPAND", FALSE, 0, 0, TRUE),
205 /* Relax assembly auto-expansion. */
206 HOWTO (R_XTENSA_ASM_SIMPLIFY, 0, 0, 0, TRUE, 0, complain_overflow_dont,
207 bfd_elf_xtensa_reloc, "R_XTENSA_ASM_SIMPLIFY", FALSE, 0, 0, TRUE),
211 HOWTO (R_XTENSA_32_PCREL, 0, 2, 32, TRUE, 0, complain_overflow_bitfield,
212 bfd_elf_xtensa_reloc, "R_XTENSA_32_PCREL",
213 FALSE, 0, 0xffffffff, TRUE),
215 /* GNU extension to record C++ vtable hierarchy. */
216 HOWTO (R_XTENSA_GNU_VTINHERIT, 0, 2, 0, FALSE, 0, complain_overflow_dont,
217 NULL, "R_XTENSA_GNU_VTINHERIT",
219 /* GNU extension to record C++ vtable member usage. */
220 HOWTO (R_XTENSA_GNU_VTENTRY, 0, 2, 0, FALSE, 0, complain_overflow_dont,
221 _bfd_elf_rel_vtable_reloc_fn, "R_XTENSA_GNU_VTENTRY",
224 /* Relocations for supporting difference of symbols. */
225 HOWTO (R_XTENSA_DIFF8, 0, 0, 8, FALSE, 0, complain_overflow_signed,
226 bfd_elf_xtensa_reloc, "R_XTENSA_DIFF8", FALSE, 0, 0xff, FALSE),
227 HOWTO (R_XTENSA_DIFF16, 0, 1, 16, FALSE, 0, complain_overflow_signed,
228 bfd_elf_xtensa_reloc, "R_XTENSA_DIFF16", FALSE, 0, 0xffff, FALSE),
229 HOWTO (R_XTENSA_DIFF32, 0, 2, 32, FALSE, 0, complain_overflow_signed,
230 bfd_elf_xtensa_reloc, "R_XTENSA_DIFF32", FALSE, 0, 0xffffffff, FALSE),
232 /* General immediate operand relocations. */
233 HOWTO (R_XTENSA_SLOT0_OP, 0, 0, 0, TRUE, 0, complain_overflow_dont,
234 bfd_elf_xtensa_reloc, "R_XTENSA_SLOT0_OP", FALSE, 0, 0, TRUE),
235 HOWTO (R_XTENSA_SLOT1_OP, 0, 0, 0, TRUE, 0, complain_overflow_dont,
236 bfd_elf_xtensa_reloc, "R_XTENSA_SLOT1_OP", FALSE, 0, 0, TRUE),
237 HOWTO (R_XTENSA_SLOT2_OP, 0, 0, 0, TRUE, 0, complain_overflow_dont,
238 bfd_elf_xtensa_reloc, "R_XTENSA_SLOT2_OP", FALSE, 0, 0, TRUE),
239 HOWTO (R_XTENSA_SLOT3_OP, 0, 0, 0, TRUE, 0, complain_overflow_dont,
240 bfd_elf_xtensa_reloc, "R_XTENSA_SLOT3_OP", FALSE, 0, 0, TRUE),
241 HOWTO (R_XTENSA_SLOT4_OP, 0, 0, 0, TRUE, 0, complain_overflow_dont,
242 bfd_elf_xtensa_reloc, "R_XTENSA_SLOT4_OP", FALSE, 0, 0, TRUE),
243 HOWTO (R_XTENSA_SLOT5_OP, 0, 0, 0, TRUE, 0, complain_overflow_dont,
244 bfd_elf_xtensa_reloc, "R_XTENSA_SLOT5_OP", FALSE, 0, 0, TRUE),
245 HOWTO (R_XTENSA_SLOT6_OP, 0, 0, 0, TRUE, 0, complain_overflow_dont,
246 bfd_elf_xtensa_reloc, "R_XTENSA_SLOT6_OP", FALSE, 0, 0, TRUE),
247 HOWTO (R_XTENSA_SLOT7_OP, 0, 0, 0, TRUE, 0, complain_overflow_dont,
248 bfd_elf_xtensa_reloc, "R_XTENSA_SLOT7_OP", FALSE, 0, 0, TRUE),
249 HOWTO (R_XTENSA_SLOT8_OP, 0, 0, 0, TRUE, 0, complain_overflow_dont,
250 bfd_elf_xtensa_reloc, "R_XTENSA_SLOT8_OP", FALSE, 0, 0, TRUE),
251 HOWTO (R_XTENSA_SLOT9_OP, 0, 0, 0, TRUE, 0, complain_overflow_dont,
252 bfd_elf_xtensa_reloc, "R_XTENSA_SLOT9_OP", FALSE, 0, 0, TRUE),
253 HOWTO (R_XTENSA_SLOT10_OP, 0, 0, 0, TRUE, 0, complain_overflow_dont,
254 bfd_elf_xtensa_reloc, "R_XTENSA_SLOT10_OP", FALSE, 0, 0, TRUE),
255 HOWTO (R_XTENSA_SLOT11_OP, 0, 0, 0, TRUE, 0, complain_overflow_dont,
256 bfd_elf_xtensa_reloc, "R_XTENSA_SLOT11_OP", FALSE, 0, 0, TRUE),
257 HOWTO (R_XTENSA_SLOT12_OP, 0, 0, 0, TRUE, 0, complain_overflow_dont,
258 bfd_elf_xtensa_reloc, "R_XTENSA_SLOT12_OP", FALSE, 0, 0, TRUE),
259 HOWTO (R_XTENSA_SLOT13_OP, 0, 0, 0, TRUE, 0, complain_overflow_dont,
260 bfd_elf_xtensa_reloc, "R_XTENSA_SLOT13_OP", FALSE, 0, 0, TRUE),
261 HOWTO (R_XTENSA_SLOT14_OP, 0, 0, 0, TRUE, 0, complain_overflow_dont,
262 bfd_elf_xtensa_reloc, "R_XTENSA_SLOT14_OP", FALSE, 0, 0, TRUE),
264 /* "Alternate" relocations. The meaning of these is opcode-specific. */
265 HOWTO (R_XTENSA_SLOT0_ALT, 0, 0, 0, TRUE, 0, complain_overflow_dont,
266 bfd_elf_xtensa_reloc, "R_XTENSA_SLOT0_ALT", FALSE, 0, 0, TRUE),
267 HOWTO (R_XTENSA_SLOT1_ALT, 0, 0, 0, TRUE, 0, complain_overflow_dont,
268 bfd_elf_xtensa_reloc, "R_XTENSA_SLOT1_ALT", FALSE, 0, 0, TRUE),
269 HOWTO (R_XTENSA_SLOT2_ALT, 0, 0, 0, TRUE, 0, complain_overflow_dont,
270 bfd_elf_xtensa_reloc, "R_XTENSA_SLOT2_ALT", FALSE, 0, 0, TRUE),
271 HOWTO (R_XTENSA_SLOT3_ALT, 0, 0, 0, TRUE, 0, complain_overflow_dont,
272 bfd_elf_xtensa_reloc, "R_XTENSA_SLOT3_ALT", FALSE, 0, 0, TRUE),
273 HOWTO (R_XTENSA_SLOT4_ALT, 0, 0, 0, TRUE, 0, complain_overflow_dont,
274 bfd_elf_xtensa_reloc, "R_XTENSA_SLOT4_ALT", FALSE, 0, 0, TRUE),
275 HOWTO (R_XTENSA_SLOT5_ALT, 0, 0, 0, TRUE, 0, complain_overflow_dont,
276 bfd_elf_xtensa_reloc, "R_XTENSA_SLOT5_ALT", FALSE, 0, 0, TRUE),
277 HOWTO (R_XTENSA_SLOT6_ALT, 0, 0, 0, TRUE, 0, complain_overflow_dont,
278 bfd_elf_xtensa_reloc, "R_XTENSA_SLOT6_ALT", FALSE, 0, 0, TRUE),
279 HOWTO (R_XTENSA_SLOT7_ALT, 0, 0, 0, TRUE, 0, complain_overflow_dont,
280 bfd_elf_xtensa_reloc, "R_XTENSA_SLOT7_ALT", FALSE, 0, 0, TRUE),
281 HOWTO (R_XTENSA_SLOT8_ALT, 0, 0, 0, TRUE, 0, complain_overflow_dont,
282 bfd_elf_xtensa_reloc, "R_XTENSA_SLOT8_ALT", FALSE, 0, 0, TRUE),
283 HOWTO (R_XTENSA_SLOT9_ALT, 0, 0, 0, TRUE, 0, complain_overflow_dont,
284 bfd_elf_xtensa_reloc, "R_XTENSA_SLOT9_ALT", FALSE, 0, 0, TRUE),
285 HOWTO (R_XTENSA_SLOT10_ALT, 0, 0, 0, TRUE, 0, complain_overflow_dont,
286 bfd_elf_xtensa_reloc, "R_XTENSA_SLOT10_ALT", FALSE, 0, 0, TRUE),
287 HOWTO (R_XTENSA_SLOT11_ALT, 0, 0, 0, TRUE, 0, complain_overflow_dont,
288 bfd_elf_xtensa_reloc, "R_XTENSA_SLOT11_ALT", FALSE, 0, 0, TRUE),
289 HOWTO (R_XTENSA_SLOT12_ALT, 0, 0, 0, TRUE, 0, complain_overflow_dont,
290 bfd_elf_xtensa_reloc, "R_XTENSA_SLOT12_ALT", FALSE, 0, 0, TRUE),
291 HOWTO (R_XTENSA_SLOT13_ALT, 0, 0, 0, TRUE, 0, complain_overflow_dont,
292 bfd_elf_xtensa_reloc, "R_XTENSA_SLOT13_ALT", FALSE, 0, 0, TRUE),
293 HOWTO (R_XTENSA_SLOT14_ALT, 0, 0, 0, TRUE, 0, complain_overflow_dont,
294 bfd_elf_xtensa_reloc, "R_XTENSA_SLOT14_ALT", FALSE, 0, 0, TRUE),
296 /* TLS relocations. */
297 HOWTO (R_XTENSA_TLSDESC_FN, 0, 2, 32, FALSE, 0, complain_overflow_dont,
298 bfd_elf_xtensa_reloc, "R_XTENSA_TLSDESC_FN",
299 FALSE, 0, 0xffffffff, FALSE),
300 HOWTO (R_XTENSA_TLSDESC_ARG, 0, 2, 32, FALSE, 0, complain_overflow_dont,
301 bfd_elf_xtensa_reloc, "R_XTENSA_TLSDESC_ARG",
302 FALSE, 0, 0xffffffff, FALSE),
303 HOWTO (R_XTENSA_TLS_DTPOFF, 0, 2, 32, FALSE, 0, complain_overflow_dont,
304 bfd_elf_xtensa_reloc, "R_XTENSA_TLS_DTPOFF",
305 FALSE, 0, 0xffffffff, FALSE),
306 HOWTO (R_XTENSA_TLS_TPOFF, 0, 2, 32, FALSE, 0, complain_overflow_dont,
307 bfd_elf_xtensa_reloc, "R_XTENSA_TLS_TPOFF",
308 FALSE, 0, 0xffffffff, FALSE),
309 HOWTO (R_XTENSA_TLS_FUNC, 0, 0, 0, FALSE, 0, complain_overflow_dont,
310 bfd_elf_xtensa_reloc, "R_XTENSA_TLS_FUNC",
312 HOWTO (R_XTENSA_TLS_ARG, 0, 0, 0, FALSE, 0, complain_overflow_dont,
313 bfd_elf_xtensa_reloc, "R_XTENSA_TLS_ARG",
315 HOWTO (R_XTENSA_TLS_CALL, 0, 0, 0, FALSE, 0, complain_overflow_dont,
316 bfd_elf_xtensa_reloc, "R_XTENSA_TLS_CALL",
322 fprintf (stderr, "Xtensa bfd reloc lookup %d (%s)\n", code, str)
327 static reloc_howto_type *
328 elf_xtensa_reloc_type_lookup (bfd *abfd ATTRIBUTE_UNUSED,
329 bfd_reloc_code_real_type code)
334 TRACE ("BFD_RELOC_NONE");
335 return &elf_howto_table[(unsigned) R_XTENSA_NONE ];
338 TRACE ("BFD_RELOC_32");
339 return &elf_howto_table[(unsigned) R_XTENSA_32 ];
341 case BFD_RELOC_32_PCREL:
342 TRACE ("BFD_RELOC_32_PCREL");
343 return &elf_howto_table[(unsigned) R_XTENSA_32_PCREL ];
345 case BFD_RELOC_XTENSA_DIFF8:
346 TRACE ("BFD_RELOC_XTENSA_DIFF8");
347 return &elf_howto_table[(unsigned) R_XTENSA_DIFF8 ];
349 case BFD_RELOC_XTENSA_DIFF16:
350 TRACE ("BFD_RELOC_XTENSA_DIFF16");
351 return &elf_howto_table[(unsigned) R_XTENSA_DIFF16 ];
353 case BFD_RELOC_XTENSA_DIFF32:
354 TRACE ("BFD_RELOC_XTENSA_DIFF32");
355 return &elf_howto_table[(unsigned) R_XTENSA_DIFF32 ];
357 case BFD_RELOC_XTENSA_RTLD:
358 TRACE ("BFD_RELOC_XTENSA_RTLD");
359 return &elf_howto_table[(unsigned) R_XTENSA_RTLD ];
361 case BFD_RELOC_XTENSA_GLOB_DAT:
362 TRACE ("BFD_RELOC_XTENSA_GLOB_DAT");
363 return &elf_howto_table[(unsigned) R_XTENSA_GLOB_DAT ];
365 case BFD_RELOC_XTENSA_JMP_SLOT:
366 TRACE ("BFD_RELOC_XTENSA_JMP_SLOT");
367 return &elf_howto_table[(unsigned) R_XTENSA_JMP_SLOT ];
369 case BFD_RELOC_XTENSA_RELATIVE:
370 TRACE ("BFD_RELOC_XTENSA_RELATIVE");
371 return &elf_howto_table[(unsigned) R_XTENSA_RELATIVE ];
373 case BFD_RELOC_XTENSA_PLT:
374 TRACE ("BFD_RELOC_XTENSA_PLT");
375 return &elf_howto_table[(unsigned) R_XTENSA_PLT ];
377 case BFD_RELOC_XTENSA_OP0:
378 TRACE ("BFD_RELOC_XTENSA_OP0");
379 return &elf_howto_table[(unsigned) R_XTENSA_OP0 ];
381 case BFD_RELOC_XTENSA_OP1:
382 TRACE ("BFD_RELOC_XTENSA_OP1");
383 return &elf_howto_table[(unsigned) R_XTENSA_OP1 ];
385 case BFD_RELOC_XTENSA_OP2:
386 TRACE ("BFD_RELOC_XTENSA_OP2");
387 return &elf_howto_table[(unsigned) R_XTENSA_OP2 ];
389 case BFD_RELOC_XTENSA_ASM_EXPAND:
390 TRACE ("BFD_RELOC_XTENSA_ASM_EXPAND");
391 return &elf_howto_table[(unsigned) R_XTENSA_ASM_EXPAND ];
393 case BFD_RELOC_XTENSA_ASM_SIMPLIFY:
394 TRACE ("BFD_RELOC_XTENSA_ASM_SIMPLIFY");
395 return &elf_howto_table[(unsigned) R_XTENSA_ASM_SIMPLIFY ];
397 case BFD_RELOC_VTABLE_INHERIT:
398 TRACE ("BFD_RELOC_VTABLE_INHERIT");
399 return &elf_howto_table[(unsigned) R_XTENSA_GNU_VTINHERIT ];
401 case BFD_RELOC_VTABLE_ENTRY:
402 TRACE ("BFD_RELOC_VTABLE_ENTRY");
403 return &elf_howto_table[(unsigned) R_XTENSA_GNU_VTENTRY ];
405 case BFD_RELOC_XTENSA_TLSDESC_FN:
406 TRACE ("BFD_RELOC_XTENSA_TLSDESC_FN");
407 return &elf_howto_table[(unsigned) R_XTENSA_TLSDESC_FN ];
409 case BFD_RELOC_XTENSA_TLSDESC_ARG:
410 TRACE ("BFD_RELOC_XTENSA_TLSDESC_ARG");
411 return &elf_howto_table[(unsigned) R_XTENSA_TLSDESC_ARG ];
413 case BFD_RELOC_XTENSA_TLS_DTPOFF:
414 TRACE ("BFD_RELOC_XTENSA_TLS_DTPOFF");
415 return &elf_howto_table[(unsigned) R_XTENSA_TLS_DTPOFF ];
417 case BFD_RELOC_XTENSA_TLS_TPOFF:
418 TRACE ("BFD_RELOC_XTENSA_TLS_TPOFF");
419 return &elf_howto_table[(unsigned) R_XTENSA_TLS_TPOFF ];
421 case BFD_RELOC_XTENSA_TLS_FUNC:
422 TRACE ("BFD_RELOC_XTENSA_TLS_FUNC");
423 return &elf_howto_table[(unsigned) R_XTENSA_TLS_FUNC ];
425 case BFD_RELOC_XTENSA_TLS_ARG:
426 TRACE ("BFD_RELOC_XTENSA_TLS_ARG");
427 return &elf_howto_table[(unsigned) R_XTENSA_TLS_ARG ];
429 case BFD_RELOC_XTENSA_TLS_CALL:
430 TRACE ("BFD_RELOC_XTENSA_TLS_CALL");
431 return &elf_howto_table[(unsigned) R_XTENSA_TLS_CALL ];
434 if (code >= BFD_RELOC_XTENSA_SLOT0_OP
435 && code <= BFD_RELOC_XTENSA_SLOT14_OP)
437 unsigned n = (R_XTENSA_SLOT0_OP +
438 (code - BFD_RELOC_XTENSA_SLOT0_OP));
439 return &elf_howto_table[n];
442 if (code >= BFD_RELOC_XTENSA_SLOT0_ALT
443 && code <= BFD_RELOC_XTENSA_SLOT14_ALT)
445 unsigned n = (R_XTENSA_SLOT0_ALT +
446 (code - BFD_RELOC_XTENSA_SLOT0_ALT));
447 return &elf_howto_table[n];
457 static reloc_howto_type *
458 elf_xtensa_reloc_name_lookup (bfd *abfd ATTRIBUTE_UNUSED,
463 for (i = 0; i < sizeof (elf_howto_table) / sizeof (elf_howto_table[0]); i++)
464 if (elf_howto_table[i].name != NULL
465 && strcasecmp (elf_howto_table[i].name, r_name) == 0)
466 return &elf_howto_table[i];
472 /* Given an ELF "rela" relocation, find the corresponding howto and record
473 it in the BFD internal arelent representation of the relocation. */
476 elf_xtensa_info_to_howto_rela (bfd *abfd ATTRIBUTE_UNUSED,
478 Elf_Internal_Rela *dst)
480 unsigned int r_type = ELF32_R_TYPE (dst->r_info);
482 if (r_type >= (unsigned int) R_XTENSA_max)
484 /* xgettext:c-format */
485 _bfd_error_handler (_("%B: invalid XTENSA reloc number: %d"), abfd, r_type);
488 cache_ptr->howto = &elf_howto_table[r_type];
492 /* Functions for the Xtensa ELF linker. */
494 /* The name of the dynamic interpreter. This is put in the .interp
497 #define ELF_DYNAMIC_INTERPRETER "/lib/ld.so"
499 /* The size in bytes of an entry in the procedure linkage table.
500 (This does _not_ include the space for the literals associated with
503 #define PLT_ENTRY_SIZE 16
505 /* For _really_ large PLTs, we may need to alternate between literals
506 and code to keep the literals within the 256K range of the L32R
507 instructions in the code. It's unlikely that anyone would ever need
508 such a big PLT, but an arbitrary limit on the PLT size would be bad.
509 Thus, we split the PLT into chunks. Since there's very little
510 overhead (2 extra literals) for each chunk, the chunk size is kept
511 small so that the code for handling multiple chunks get used and
512 tested regularly. With 254 entries, there are 1K of literals for
513 each chunk, and that seems like a nice round number. */
515 #define PLT_ENTRIES_PER_CHUNK 254
517 /* PLT entries are actually used as stub functions for lazy symbol
518 resolution. Once the symbol is resolved, the stub function is never
519 invoked. Note: the 32-byte frame size used here cannot be changed
520 without a corresponding change in the runtime linker. */
522 static const bfd_byte elf_xtensa_be_plt_entry[][PLT_ENTRY_SIZE] =
525 0x6c, 0x10, 0x04, /* entry sp, 32 */
526 0x18, 0x00, 0x00, /* l32r a8, [got entry for rtld's resolver] */
527 0x1a, 0x00, 0x00, /* l32r a10, [got entry for rtld's link map] */
528 0x1b, 0x00, 0x00, /* l32r a11, [literal for reloc index] */
529 0x0a, 0x80, 0x00, /* jx a8 */
533 0x18, 0x00, 0x00, /* l32r a8, [got entry for rtld's resolver] */
534 0x1a, 0x00, 0x00, /* l32r a10, [got entry for rtld's link map] */
535 0x1b, 0x00, 0x00, /* l32r a11, [literal for reloc index] */
536 0x0a, 0x80, 0x00, /* jx a8 */
541 static const bfd_byte elf_xtensa_le_plt_entry[][PLT_ENTRY_SIZE] =
544 0x36, 0x41, 0x00, /* entry sp, 32 */
545 0x81, 0x00, 0x00, /* l32r a8, [got entry for rtld's resolver] */
546 0xa1, 0x00, 0x00, /* l32r a10, [got entry for rtld's link map] */
547 0xb1, 0x00, 0x00, /* l32r a11, [literal for reloc index] */
548 0xa0, 0x08, 0x00, /* jx a8 */
552 0x81, 0x00, 0x00, /* l32r a8, [got entry for rtld's resolver] */
553 0xa1, 0x00, 0x00, /* l32r a10, [got entry for rtld's link map] */
554 0xb1, 0x00, 0x00, /* l32r a11, [literal for reloc index] */
555 0xa0, 0x08, 0x00, /* jx a8 */
560 /* The size of the thread control block. */
563 struct elf_xtensa_link_hash_entry
565 struct elf_link_hash_entry elf;
567 bfd_signed_vma tlsfunc_refcount;
569 #define GOT_UNKNOWN 0
571 #define GOT_TLS_GD 2 /* global or local dynamic */
572 #define GOT_TLS_IE 4 /* initial or local exec */
573 #define GOT_TLS_ANY (GOT_TLS_GD | GOT_TLS_IE)
574 unsigned char tls_type;
577 #define elf_xtensa_hash_entry(ent) ((struct elf_xtensa_link_hash_entry *)(ent))
579 struct elf_xtensa_obj_tdata
581 struct elf_obj_tdata root;
583 /* tls_type for each local got entry. */
584 char *local_got_tls_type;
586 bfd_signed_vma *local_tlsfunc_refcounts;
589 #define elf_xtensa_tdata(abfd) \
590 ((struct elf_xtensa_obj_tdata *) (abfd)->tdata.any)
592 #define elf_xtensa_local_got_tls_type(abfd) \
593 (elf_xtensa_tdata (abfd)->local_got_tls_type)
595 #define elf_xtensa_local_tlsfunc_refcounts(abfd) \
596 (elf_xtensa_tdata (abfd)->local_tlsfunc_refcounts)
598 #define is_xtensa_elf(bfd) \
599 (bfd_get_flavour (bfd) == bfd_target_elf_flavour \
600 && elf_tdata (bfd) != NULL \
601 && elf_object_id (bfd) == XTENSA_ELF_DATA)
604 elf_xtensa_mkobject (bfd *abfd)
606 return bfd_elf_allocate_object (abfd, sizeof (struct elf_xtensa_obj_tdata),
610 /* Xtensa ELF linker hash table. */
612 struct elf_xtensa_link_hash_table
614 struct elf_link_hash_table elf;
616 /* Short-cuts to get to dynamic linker sections. */
618 asection *spltlittbl;
620 /* Total count of PLT relocations seen during check_relocs.
621 The actual PLT code must be split into multiple sections and all
622 the sections have to be created before size_dynamic_sections,
623 where we figure out the exact number of PLT entries that will be
624 needed. It is OK if this count is an overestimate, e.g., some
625 relocations may be removed by GC. */
628 struct elf_xtensa_link_hash_entry *tlsbase;
631 /* Get the Xtensa ELF linker hash table from a link_info structure. */
633 #define elf_xtensa_hash_table(p) \
634 (elf_hash_table_id ((struct elf_link_hash_table *) ((p)->hash)) \
635 == XTENSA_ELF_DATA ? ((struct elf_xtensa_link_hash_table *) ((p)->hash)) : NULL)
637 /* Create an entry in an Xtensa ELF linker hash table. */
639 static struct bfd_hash_entry *
640 elf_xtensa_link_hash_newfunc (struct bfd_hash_entry *entry,
641 struct bfd_hash_table *table,
644 /* Allocate the structure if it has not already been allocated by a
648 entry = bfd_hash_allocate (table,
649 sizeof (struct elf_xtensa_link_hash_entry));
654 /* Call the allocation method of the superclass. */
655 entry = _bfd_elf_link_hash_newfunc (entry, table, string);
658 struct elf_xtensa_link_hash_entry *eh = elf_xtensa_hash_entry (entry);
659 eh->tlsfunc_refcount = 0;
660 eh->tls_type = GOT_UNKNOWN;
666 /* Create an Xtensa ELF linker hash table. */
668 static struct bfd_link_hash_table *
669 elf_xtensa_link_hash_table_create (bfd *abfd)
671 struct elf_link_hash_entry *tlsbase;
672 struct elf_xtensa_link_hash_table *ret;
673 bfd_size_type amt = sizeof (struct elf_xtensa_link_hash_table);
675 ret = bfd_zmalloc (amt);
679 if (!_bfd_elf_link_hash_table_init (&ret->elf, abfd,
680 elf_xtensa_link_hash_newfunc,
681 sizeof (struct elf_xtensa_link_hash_entry),
688 /* Create a hash entry for "_TLS_MODULE_BASE_" to speed up checking
690 tlsbase = elf_link_hash_lookup (&ret->elf, "_TLS_MODULE_BASE_",
692 tlsbase->root.type = bfd_link_hash_new;
693 tlsbase->root.u.undef.abfd = NULL;
694 tlsbase->non_elf = 0;
695 ret->tlsbase = elf_xtensa_hash_entry (tlsbase);
696 ret->tlsbase->tls_type = GOT_UNKNOWN;
698 return &ret->elf.root;
701 /* Copy the extra info we tack onto an elf_link_hash_entry. */
704 elf_xtensa_copy_indirect_symbol (struct bfd_link_info *info,
705 struct elf_link_hash_entry *dir,
706 struct elf_link_hash_entry *ind)
708 struct elf_xtensa_link_hash_entry *edir, *eind;
710 edir = elf_xtensa_hash_entry (dir);
711 eind = elf_xtensa_hash_entry (ind);
713 if (ind->root.type == bfd_link_hash_indirect)
715 edir->tlsfunc_refcount += eind->tlsfunc_refcount;
716 eind->tlsfunc_refcount = 0;
718 if (dir->got.refcount <= 0)
720 edir->tls_type = eind->tls_type;
721 eind->tls_type = GOT_UNKNOWN;
725 _bfd_elf_link_hash_copy_indirect (info, dir, ind);
728 static inline bfd_boolean
729 elf_xtensa_dynamic_symbol_p (struct elf_link_hash_entry *h,
730 struct bfd_link_info *info)
732 /* Check if we should do dynamic things to this symbol. The
733 "ignore_protected" argument need not be set, because Xtensa code
734 does not require special handling of STV_PROTECTED to make function
735 pointer comparisons work properly. The PLT addresses are never
736 used for function pointers. */
738 return _bfd_elf_dynamic_symbol_p (h, info, 0);
743 property_table_compare (const void *ap, const void *bp)
745 const property_table_entry *a = (const property_table_entry *) ap;
746 const property_table_entry *b = (const property_table_entry *) bp;
748 if (a->address == b->address)
750 if (a->size != b->size)
751 return (a->size - b->size);
753 if ((a->flags & XTENSA_PROP_ALIGN) != (b->flags & XTENSA_PROP_ALIGN))
754 return ((b->flags & XTENSA_PROP_ALIGN)
755 - (a->flags & XTENSA_PROP_ALIGN));
757 if ((a->flags & XTENSA_PROP_ALIGN)
758 && (GET_XTENSA_PROP_ALIGNMENT (a->flags)
759 != GET_XTENSA_PROP_ALIGNMENT (b->flags)))
760 return (GET_XTENSA_PROP_ALIGNMENT (a->flags)
761 - GET_XTENSA_PROP_ALIGNMENT (b->flags));
763 if ((a->flags & XTENSA_PROP_UNREACHABLE)
764 != (b->flags & XTENSA_PROP_UNREACHABLE))
765 return ((b->flags & XTENSA_PROP_UNREACHABLE)
766 - (a->flags & XTENSA_PROP_UNREACHABLE));
768 return (a->flags - b->flags);
771 return (a->address - b->address);
776 property_table_matches (const void *ap, const void *bp)
778 const property_table_entry *a = (const property_table_entry *) ap;
779 const property_table_entry *b = (const property_table_entry *) bp;
781 /* Check if one entry overlaps with the other. */
782 if ((b->address >= a->address && b->address < (a->address + a->size))
783 || (a->address >= b->address && a->address < (b->address + b->size)))
786 return (a->address - b->address);
790 /* Get the literal table or property table entries for the given
791 section. Sets TABLE_P and returns the number of entries. On
792 error, returns a negative value. */
795 xtensa_read_table_entries (bfd *abfd,
797 property_table_entry **table_p,
798 const char *sec_name,
799 bfd_boolean output_addr)
801 asection *table_section;
802 bfd_size_type table_size = 0;
803 bfd_byte *table_data;
804 property_table_entry *blocks;
805 int blk, block_count;
806 bfd_size_type num_records;
807 Elf_Internal_Rela *internal_relocs, *irel, *rel_end;
808 bfd_vma section_addr, off;
809 flagword predef_flags;
810 bfd_size_type table_entry_size, section_limit;
813 || !(section->flags & SEC_ALLOC)
814 || (section->flags & SEC_DEBUGGING))
820 table_section = xtensa_get_property_section (section, sec_name);
822 table_size = table_section->size;
830 predef_flags = xtensa_get_property_predef_flags (table_section);
831 table_entry_size = 12;
833 table_entry_size -= 4;
835 num_records = table_size / table_entry_size;
836 table_data = retrieve_contents (abfd, table_section, TRUE);
837 blocks = (property_table_entry *)
838 bfd_malloc (num_records * sizeof (property_table_entry));
842 section_addr = section->output_section->vma + section->output_offset;
844 section_addr = section->vma;
846 internal_relocs = retrieve_internal_relocs (abfd, table_section, TRUE);
847 if (internal_relocs && !table_section->reloc_done)
849 qsort (internal_relocs, table_section->reloc_count,
850 sizeof (Elf_Internal_Rela), internal_reloc_compare);
851 irel = internal_relocs;
856 section_limit = bfd_get_section_limit (abfd, section);
857 rel_end = internal_relocs + table_section->reloc_count;
859 for (off = 0; off < table_size; off += table_entry_size)
861 bfd_vma address = bfd_get_32 (abfd, table_data + off);
863 /* Skip any relocations before the current offset. This should help
864 avoid confusion caused by unexpected relocations for the preceding
867 (irel->r_offset < off
868 || (irel->r_offset == off
869 && ELF32_R_TYPE (irel->r_info) == R_XTENSA_NONE)))
876 if (irel && irel->r_offset == off)
879 unsigned long r_symndx = ELF32_R_SYM (irel->r_info);
880 BFD_ASSERT (ELF32_R_TYPE (irel->r_info) == R_XTENSA_32);
882 if (get_elf_r_symndx_section (abfd, r_symndx) != section)
885 sym_off = get_elf_r_symndx_offset (abfd, r_symndx);
886 BFD_ASSERT (sym_off == 0);
887 address += (section_addr + sym_off + irel->r_addend);
891 if (address < section_addr
892 || address >= section_addr + section_limit)
896 blocks[block_count].address = address;
897 blocks[block_count].size = bfd_get_32 (abfd, table_data + off + 4);
899 blocks[block_count].flags = predef_flags;
901 blocks[block_count].flags = bfd_get_32 (abfd, table_data + off + 8);
905 release_contents (table_section, table_data);
906 release_internal_relocs (table_section, internal_relocs);
910 /* Now sort them into address order for easy reference. */
911 qsort (blocks, block_count, sizeof (property_table_entry),
912 property_table_compare);
914 /* Check that the table contents are valid. Problems may occur,
915 for example, if an unrelocated object file is stripped. */
916 for (blk = 1; blk < block_count; blk++)
918 /* The only circumstance where two entries may legitimately
919 have the same address is when one of them is a zero-size
920 placeholder to mark a place where fill can be inserted.
921 The zero-size entry should come first. */
922 if (blocks[blk - 1].address == blocks[blk].address &&
923 blocks[blk - 1].size != 0)
925 /* xgettext:c-format */
926 _bfd_error_handler (_("%B(%A): invalid property table"),
928 bfd_set_error (bfd_error_bad_value);
940 static property_table_entry *
941 elf_xtensa_find_property_entry (property_table_entry *property_table,
942 int property_table_size,
945 property_table_entry entry;
946 property_table_entry *rv;
948 if (property_table_size == 0)
951 entry.address = addr;
955 rv = bsearch (&entry, property_table, property_table_size,
956 sizeof (property_table_entry), property_table_matches);
962 elf_xtensa_in_literal_pool (property_table_entry *lit_table,
966 if (elf_xtensa_find_property_entry (lit_table, lit_table_size, addr))
973 /* Look through the relocs for a section during the first phase, and
974 calculate needed space in the dynamic reloc sections. */
977 elf_xtensa_check_relocs (bfd *abfd,
978 struct bfd_link_info *info,
980 const Elf_Internal_Rela *relocs)
982 struct elf_xtensa_link_hash_table *htab;
983 Elf_Internal_Shdr *symtab_hdr;
984 struct elf_link_hash_entry **sym_hashes;
985 const Elf_Internal_Rela *rel;
986 const Elf_Internal_Rela *rel_end;
988 if (bfd_link_relocatable (info) || (sec->flags & SEC_ALLOC) == 0)
991 BFD_ASSERT (is_xtensa_elf (abfd));
993 htab = elf_xtensa_hash_table (info);
997 symtab_hdr = &elf_tdata (abfd)->symtab_hdr;
998 sym_hashes = elf_sym_hashes (abfd);
1000 rel_end = relocs + sec->reloc_count;
1001 for (rel = relocs; rel < rel_end; rel++)
1003 unsigned int r_type;
1005 struct elf_link_hash_entry *h = NULL;
1006 struct elf_xtensa_link_hash_entry *eh;
1007 int tls_type, old_tls_type;
1008 bfd_boolean is_got = FALSE;
1009 bfd_boolean is_plt = FALSE;
1010 bfd_boolean is_tlsfunc = FALSE;
1012 r_symndx = ELF32_R_SYM (rel->r_info);
1013 r_type = ELF32_R_TYPE (rel->r_info);
1015 if (r_symndx >= NUM_SHDR_ENTRIES (symtab_hdr))
1017 /* xgettext:c-format */
1018 _bfd_error_handler (_("%B: bad symbol index: %d"),
1023 if (r_symndx >= symtab_hdr->sh_info)
1025 h = sym_hashes[r_symndx - symtab_hdr->sh_info];
1026 while (h->root.type == bfd_link_hash_indirect
1027 || h->root.type == bfd_link_hash_warning)
1028 h = (struct elf_link_hash_entry *) h->root.u.i.link;
1030 /* PR15323, ref flags aren't set for references in the same
1032 h->root.non_ir_ref_regular = 1;
1034 eh = elf_xtensa_hash_entry (h);
1038 case R_XTENSA_TLSDESC_FN:
1039 if (bfd_link_pic (info))
1041 tls_type = GOT_TLS_GD;
1046 tls_type = GOT_TLS_IE;
1049 case R_XTENSA_TLSDESC_ARG:
1050 if (bfd_link_pic (info))
1052 tls_type = GOT_TLS_GD;
1057 tls_type = GOT_TLS_IE;
1058 if (h && elf_xtensa_hash_entry (h) != htab->tlsbase)
1063 case R_XTENSA_TLS_DTPOFF:
1064 if (bfd_link_pic (info))
1065 tls_type = GOT_TLS_GD;
1067 tls_type = GOT_TLS_IE;
1070 case R_XTENSA_TLS_TPOFF:
1071 tls_type = GOT_TLS_IE;
1072 if (bfd_link_pic (info))
1073 info->flags |= DF_STATIC_TLS;
1074 if (bfd_link_pic (info) || h)
1079 tls_type = GOT_NORMAL;
1084 tls_type = GOT_NORMAL;
1088 case R_XTENSA_GNU_VTINHERIT:
1089 /* This relocation describes the C++ object vtable hierarchy.
1090 Reconstruct it for later use during GC. */
1091 if (!bfd_elf_gc_record_vtinherit (abfd, sec, h, rel->r_offset))
1095 case R_XTENSA_GNU_VTENTRY:
1096 /* This relocation describes which C++ vtable entries are actually
1097 used. Record for later use during GC. */
1098 BFD_ASSERT (h != NULL);
1100 && !bfd_elf_gc_record_vtentry (abfd, sec, h, rel->r_addend))
1105 /* Nothing to do for any other relocations. */
1113 if (h->plt.refcount <= 0)
1116 h->plt.refcount = 1;
1119 h->plt.refcount += 1;
1121 /* Keep track of the total PLT relocation count even if we
1122 don't yet know whether the dynamic sections will be
1124 htab->plt_reloc_count += 1;
1126 if (elf_hash_table (info)->dynamic_sections_created)
1128 if (! add_extra_plt_sections (info, htab->plt_reloc_count))
1134 if (h->got.refcount <= 0)
1135 h->got.refcount = 1;
1137 h->got.refcount += 1;
1141 eh->tlsfunc_refcount += 1;
1143 old_tls_type = eh->tls_type;
1147 /* Allocate storage the first time. */
1148 if (elf_local_got_refcounts (abfd) == NULL)
1150 bfd_size_type size = symtab_hdr->sh_info;
1153 mem = bfd_zalloc (abfd, size * sizeof (bfd_signed_vma));
1156 elf_local_got_refcounts (abfd) = (bfd_signed_vma *) mem;
1158 mem = bfd_zalloc (abfd, size);
1161 elf_xtensa_local_got_tls_type (abfd) = (char *) mem;
1163 mem = bfd_zalloc (abfd, size * sizeof (bfd_signed_vma));
1166 elf_xtensa_local_tlsfunc_refcounts (abfd)
1167 = (bfd_signed_vma *) mem;
1170 /* This is a global offset table entry for a local symbol. */
1171 if (is_got || is_plt)
1172 elf_local_got_refcounts (abfd) [r_symndx] += 1;
1175 elf_xtensa_local_tlsfunc_refcounts (abfd) [r_symndx] += 1;
1177 old_tls_type = elf_xtensa_local_got_tls_type (abfd) [r_symndx];
1180 if ((old_tls_type & GOT_TLS_IE) && (tls_type & GOT_TLS_IE))
1181 tls_type |= old_tls_type;
1182 /* If a TLS symbol is accessed using IE at least once,
1183 there is no point to use a dynamic model for it. */
1184 else if (old_tls_type != tls_type && old_tls_type != GOT_UNKNOWN
1185 && ((old_tls_type & GOT_TLS_GD) == 0
1186 || (tls_type & GOT_TLS_IE) == 0))
1188 if ((old_tls_type & GOT_TLS_IE) && (tls_type & GOT_TLS_GD))
1189 tls_type = old_tls_type;
1190 else if ((old_tls_type & GOT_TLS_GD) && (tls_type & GOT_TLS_GD))
1191 tls_type |= old_tls_type;
1195 /* xgettext:c-format */
1196 (_("%B: `%s' accessed both as normal and thread local symbol"),
1198 h ? h->root.root.string : "<local>");
1203 if (old_tls_type != tls_type)
1206 eh->tls_type = tls_type;
1208 elf_xtensa_local_got_tls_type (abfd) [r_symndx] = tls_type;
1217 elf_xtensa_make_sym_local (struct bfd_link_info *info,
1218 struct elf_link_hash_entry *h)
1220 if (bfd_link_pic (info))
1222 if (h->plt.refcount > 0)
1224 /* For shared objects, there's no need for PLT entries for local
1225 symbols (use RELATIVE relocs instead of JMP_SLOT relocs). */
1226 if (h->got.refcount < 0)
1227 h->got.refcount = 0;
1228 h->got.refcount += h->plt.refcount;
1229 h->plt.refcount = 0;
1234 /* Don't need any dynamic relocations at all. */
1235 h->plt.refcount = 0;
1236 h->got.refcount = 0;
1242 elf_xtensa_hide_symbol (struct bfd_link_info *info,
1243 struct elf_link_hash_entry *h,
1244 bfd_boolean force_local)
1246 /* For a shared link, move the plt refcount to the got refcount to leave
1247 space for RELATIVE relocs. */
1248 elf_xtensa_make_sym_local (info, h);
1250 _bfd_elf_link_hash_hide_symbol (info, h, force_local);
1254 /* Return the section that should be marked against GC for a given
1258 elf_xtensa_gc_mark_hook (asection *sec,
1259 struct bfd_link_info *info,
1260 Elf_Internal_Rela *rel,
1261 struct elf_link_hash_entry *h,
1262 Elf_Internal_Sym *sym)
1264 /* Property sections are marked "KEEP" in the linker scripts, but they
1265 should not cause other sections to be marked. (This approach relies
1266 on elf_xtensa_discard_info to remove property table entries that
1267 describe discarded sections. Alternatively, it might be more
1268 efficient to avoid using "KEEP" in the linker scripts and instead use
1269 the gc_mark_extra_sections hook to mark only the property sections
1270 that describe marked sections. That alternative does not work well
1271 with the current property table sections, which do not correspond
1272 one-to-one with the sections they describe, but that should be fixed
1274 if (xtensa_is_property_section (sec))
1278 switch (ELF32_R_TYPE (rel->r_info))
1280 case R_XTENSA_GNU_VTINHERIT:
1281 case R_XTENSA_GNU_VTENTRY:
1285 return _bfd_elf_gc_mark_hook (sec, info, rel, h, sym);
1289 /* Update the GOT & PLT entry reference counts
1290 for the section being removed. */
1293 elf_xtensa_gc_sweep_hook (bfd *abfd,
1294 struct bfd_link_info *info,
1296 const Elf_Internal_Rela *relocs)
1298 Elf_Internal_Shdr *symtab_hdr;
1299 struct elf_link_hash_entry **sym_hashes;
1300 const Elf_Internal_Rela *rel, *relend;
1301 struct elf_xtensa_link_hash_table *htab;
1303 htab = elf_xtensa_hash_table (info);
1307 if (bfd_link_relocatable (info))
1310 if ((sec->flags & SEC_ALLOC) == 0)
1313 symtab_hdr = &elf_tdata (abfd)->symtab_hdr;
1314 sym_hashes = elf_sym_hashes (abfd);
1316 relend = relocs + sec->reloc_count;
1317 for (rel = relocs; rel < relend; rel++)
1319 unsigned long r_symndx;
1320 unsigned int r_type;
1321 struct elf_link_hash_entry *h = NULL;
1322 struct elf_xtensa_link_hash_entry *eh;
1323 bfd_boolean is_got = FALSE;
1324 bfd_boolean is_plt = FALSE;
1325 bfd_boolean is_tlsfunc = FALSE;
1327 r_symndx = ELF32_R_SYM (rel->r_info);
1328 if (r_symndx >= symtab_hdr->sh_info)
1330 h = sym_hashes[r_symndx - symtab_hdr->sh_info];
1331 while (h->root.type == bfd_link_hash_indirect
1332 || h->root.type == bfd_link_hash_warning)
1333 h = (struct elf_link_hash_entry *) h->root.u.i.link;
1335 eh = elf_xtensa_hash_entry (h);
1337 r_type = ELF32_R_TYPE (rel->r_info);
1340 case R_XTENSA_TLSDESC_FN:
1341 if (bfd_link_pic (info))
1348 case R_XTENSA_TLSDESC_ARG:
1349 if (bfd_link_pic (info))
1353 if (h && elf_xtensa_hash_entry (h) != htab->tlsbase)
1358 case R_XTENSA_TLS_TPOFF:
1359 if (bfd_link_pic (info) || h)
1379 /* If the symbol has been localized its plt.refcount got moved
1380 to got.refcount. Handle it as GOT. */
1381 if (h->plt.refcount > 0)
1388 if (h->got.refcount > 0)
1393 if (eh->tlsfunc_refcount > 0)
1394 eh->tlsfunc_refcount--;
1399 if (is_got || is_plt)
1401 bfd_signed_vma *got_refcount
1402 = &elf_local_got_refcounts (abfd) [r_symndx];
1403 if (*got_refcount > 0)
1408 bfd_signed_vma *tlsfunc_refcount
1409 = &elf_xtensa_local_tlsfunc_refcounts (abfd) [r_symndx];
1410 if (*tlsfunc_refcount > 0)
1411 *tlsfunc_refcount -= 1;
1420 /* Create all the dynamic sections. */
1423 elf_xtensa_create_dynamic_sections (bfd *dynobj, struct bfd_link_info *info)
1425 struct elf_xtensa_link_hash_table *htab;
1426 flagword flags, noalloc_flags;
1428 htab = elf_xtensa_hash_table (info);
1432 /* First do all the standard stuff. */
1433 if (! _bfd_elf_create_dynamic_sections (dynobj, info))
1436 /* Create any extra PLT sections in case check_relocs has already
1437 been called on all the non-dynamic input files. */
1438 if (! add_extra_plt_sections (info, htab->plt_reloc_count))
1441 noalloc_flags = (SEC_HAS_CONTENTS | SEC_IN_MEMORY
1442 | SEC_LINKER_CREATED | SEC_READONLY);
1443 flags = noalloc_flags | SEC_ALLOC | SEC_LOAD;
1445 /* Mark the ".got.plt" section READONLY. */
1446 if (htab->elf.sgotplt == NULL
1447 || ! bfd_set_section_flags (dynobj, htab->elf.sgotplt, flags))
1450 /* Create ".got.loc" (literal tables for use by dynamic linker). */
1451 htab->sgotloc = bfd_make_section_anyway_with_flags (dynobj, ".got.loc",
1453 if (htab->sgotloc == NULL
1454 || ! bfd_set_section_alignment (dynobj, htab->sgotloc, 2))
1457 /* Create ".xt.lit.plt" (literal table for ".got.plt*"). */
1458 htab->spltlittbl = bfd_make_section_anyway_with_flags (dynobj, ".xt.lit.plt",
1460 if (htab->spltlittbl == NULL
1461 || ! bfd_set_section_alignment (dynobj, htab->spltlittbl, 2))
1469 add_extra_plt_sections (struct bfd_link_info *info, int count)
1471 bfd *dynobj = elf_hash_table (info)->dynobj;
1474 /* Iterate over all chunks except 0 which uses the standard ".plt" and
1475 ".got.plt" sections. */
1476 for (chunk = count / PLT_ENTRIES_PER_CHUNK; chunk > 0; chunk--)
1482 /* Stop when we find a section has already been created. */
1483 if (elf_xtensa_get_plt_section (info, chunk))
1486 flags = (SEC_ALLOC | SEC_LOAD | SEC_HAS_CONTENTS | SEC_IN_MEMORY
1487 | SEC_LINKER_CREATED | SEC_READONLY);
1489 sname = (char *) bfd_malloc (10);
1490 sprintf (sname, ".plt.%u", chunk);
1491 s = bfd_make_section_anyway_with_flags (dynobj, sname, flags | SEC_CODE);
1493 || ! bfd_set_section_alignment (dynobj, s, 2))
1496 sname = (char *) bfd_malloc (14);
1497 sprintf (sname, ".got.plt.%u", chunk);
1498 s = bfd_make_section_anyway_with_flags (dynobj, sname, flags);
1500 || ! bfd_set_section_alignment (dynobj, s, 2))
1508 /* Adjust a symbol defined by a dynamic object and referenced by a
1509 regular object. The current definition is in some section of the
1510 dynamic object, but we're not including those sections. We have to
1511 change the definition to something the rest of the link can
1515 elf_xtensa_adjust_dynamic_symbol (struct bfd_link_info *info ATTRIBUTE_UNUSED,
1516 struct elf_link_hash_entry *h)
1518 /* If this is a weak symbol, and there is a real definition, the
1519 processor independent code will have arranged for us to see the
1520 real definition first, and we can just use the same value. */
1523 BFD_ASSERT (h->u.weakdef->root.type == bfd_link_hash_defined
1524 || h->u.weakdef->root.type == bfd_link_hash_defweak);
1525 h->root.u.def.section = h->u.weakdef->root.u.def.section;
1526 h->root.u.def.value = h->u.weakdef->root.u.def.value;
1530 /* This is a reference to a symbol defined by a dynamic object. The
1531 reference must go through the GOT, so there's no need for COPY relocs,
1539 elf_xtensa_allocate_dynrelocs (struct elf_link_hash_entry *h, void *arg)
1541 struct bfd_link_info *info;
1542 struct elf_xtensa_link_hash_table *htab;
1543 struct elf_xtensa_link_hash_entry *eh = elf_xtensa_hash_entry (h);
1545 if (h->root.type == bfd_link_hash_indirect)
1548 info = (struct bfd_link_info *) arg;
1549 htab = elf_xtensa_hash_table (info);
1553 /* If we saw any use of an IE model for this symbol, we can then optimize
1554 away GOT entries for any TLSDESC_FN relocs. */
1555 if ((eh->tls_type & GOT_TLS_IE) != 0)
1557 BFD_ASSERT (h->got.refcount >= eh->tlsfunc_refcount);
1558 h->got.refcount -= eh->tlsfunc_refcount;
1561 if (! elf_xtensa_dynamic_symbol_p (h, info))
1562 elf_xtensa_make_sym_local (info, h);
1564 if (h->plt.refcount > 0)
1565 htab->elf.srelplt->size += (h->plt.refcount * sizeof (Elf32_External_Rela));
1567 if (h->got.refcount > 0)
1568 htab->elf.srelgot->size += (h->got.refcount * sizeof (Elf32_External_Rela));
1575 elf_xtensa_allocate_local_got_size (struct bfd_link_info *info)
1577 struct elf_xtensa_link_hash_table *htab;
1580 htab = elf_xtensa_hash_table (info);
1584 for (i = info->input_bfds; i; i = i->link.next)
1586 bfd_signed_vma *local_got_refcounts;
1587 bfd_size_type j, cnt;
1588 Elf_Internal_Shdr *symtab_hdr;
1590 local_got_refcounts = elf_local_got_refcounts (i);
1591 if (!local_got_refcounts)
1594 symtab_hdr = &elf_tdata (i)->symtab_hdr;
1595 cnt = symtab_hdr->sh_info;
1597 for (j = 0; j < cnt; ++j)
1599 /* If we saw any use of an IE model for this symbol, we can
1600 then optimize away GOT entries for any TLSDESC_FN relocs. */
1601 if ((elf_xtensa_local_got_tls_type (i) [j] & GOT_TLS_IE) != 0)
1603 bfd_signed_vma *tlsfunc_refcount
1604 = &elf_xtensa_local_tlsfunc_refcounts (i) [j];
1605 BFD_ASSERT (local_got_refcounts[j] >= *tlsfunc_refcount);
1606 local_got_refcounts[j] -= *tlsfunc_refcount;
1609 if (local_got_refcounts[j] > 0)
1610 htab->elf.srelgot->size += (local_got_refcounts[j]
1611 * sizeof (Elf32_External_Rela));
1617 /* Set the sizes of the dynamic sections. */
1620 elf_xtensa_size_dynamic_sections (bfd *output_bfd ATTRIBUTE_UNUSED,
1621 struct bfd_link_info *info)
1623 struct elf_xtensa_link_hash_table *htab;
1625 asection *s, *srelplt, *splt, *sgotplt, *srelgot, *spltlittbl, *sgotloc;
1626 bfd_boolean relplt, relgot;
1627 int plt_entries, plt_chunks, chunk;
1632 htab = elf_xtensa_hash_table (info);
1636 dynobj = elf_hash_table (info)->dynobj;
1639 srelgot = htab->elf.srelgot;
1640 srelplt = htab->elf.srelplt;
1642 if (elf_hash_table (info)->dynamic_sections_created)
1644 BFD_ASSERT (htab->elf.srelgot != NULL
1645 && htab->elf.srelplt != NULL
1646 && htab->elf.sgot != NULL
1647 && htab->spltlittbl != NULL
1648 && htab->sgotloc != NULL);
1650 /* Set the contents of the .interp section to the interpreter. */
1651 if (bfd_link_executable (info) && !info->nointerp)
1653 s = bfd_get_linker_section (dynobj, ".interp");
1656 s->size = sizeof ELF_DYNAMIC_INTERPRETER;
1657 s->contents = (unsigned char *) ELF_DYNAMIC_INTERPRETER;
1660 /* Allocate room for one word in ".got". */
1661 htab->elf.sgot->size = 4;
1663 /* Allocate space in ".rela.got" for literals that reference global
1664 symbols and space in ".rela.plt" for literals that have PLT
1666 elf_link_hash_traverse (elf_hash_table (info),
1667 elf_xtensa_allocate_dynrelocs,
1670 /* If we are generating a shared object, we also need space in
1671 ".rela.got" for R_XTENSA_RELATIVE relocs for literals that
1672 reference local symbols. */
1673 if (bfd_link_pic (info))
1674 elf_xtensa_allocate_local_got_size (info);
1676 /* Allocate space in ".plt" to match the size of ".rela.plt". For
1677 each PLT entry, we need the PLT code plus a 4-byte literal.
1678 For each chunk of ".plt", we also need two more 4-byte
1679 literals, two corresponding entries in ".rela.got", and an
1680 8-byte entry in ".xt.lit.plt". */
1681 spltlittbl = htab->spltlittbl;
1682 plt_entries = srelplt->size / sizeof (Elf32_External_Rela);
1684 (plt_entries + PLT_ENTRIES_PER_CHUNK - 1) / PLT_ENTRIES_PER_CHUNK;
1686 /* Iterate over all the PLT chunks, including any extra sections
1687 created earlier because the initial count of PLT relocations
1688 was an overestimate. */
1690 (splt = elf_xtensa_get_plt_section (info, chunk)) != NULL;
1695 sgotplt = elf_xtensa_get_gotplt_section (info, chunk);
1696 BFD_ASSERT (sgotplt != NULL);
1698 if (chunk < plt_chunks - 1)
1699 chunk_entries = PLT_ENTRIES_PER_CHUNK;
1700 else if (chunk == plt_chunks - 1)
1701 chunk_entries = plt_entries - (chunk * PLT_ENTRIES_PER_CHUNK);
1705 if (chunk_entries != 0)
1707 sgotplt->size = 4 * (chunk_entries + 2);
1708 splt->size = PLT_ENTRY_SIZE * chunk_entries;
1709 srelgot->size += 2 * sizeof (Elf32_External_Rela);
1710 spltlittbl->size += 8;
1719 /* Allocate space in ".got.loc" to match the total size of all the
1721 sgotloc = htab->sgotloc;
1722 sgotloc->size = spltlittbl->size;
1723 for (abfd = info->input_bfds; abfd != NULL; abfd = abfd->link.next)
1725 if (abfd->flags & DYNAMIC)
1727 for (s = abfd->sections; s != NULL; s = s->next)
1729 if (! discarded_section (s)
1730 && xtensa_is_littable_section (s)
1732 sgotloc->size += s->size;
1737 /* Allocate memory for dynamic sections. */
1740 for (s = dynobj->sections; s != NULL; s = s->next)
1744 if ((s->flags & SEC_LINKER_CREATED) == 0)
1747 /* It's OK to base decisions on the section name, because none
1748 of the dynobj section names depend upon the input files. */
1749 name = bfd_get_section_name (dynobj, s);
1751 if (CONST_STRNEQ (name, ".rela"))
1755 if (strcmp (name, ".rela.plt") == 0)
1757 else if (strcmp (name, ".rela.got") == 0)
1760 /* We use the reloc_count field as a counter if we need
1761 to copy relocs into the output file. */
1765 else if (! CONST_STRNEQ (name, ".plt.")
1766 && ! CONST_STRNEQ (name, ".got.plt.")
1767 && strcmp (name, ".got") != 0
1768 && strcmp (name, ".plt") != 0
1769 && strcmp (name, ".got.plt") != 0
1770 && strcmp (name, ".xt.lit.plt") != 0
1771 && strcmp (name, ".got.loc") != 0)
1773 /* It's not one of our sections, so don't allocate space. */
1779 /* If we don't need this section, strip it from the output
1780 file. We must create the ".plt*" and ".got.plt*"
1781 sections in create_dynamic_sections and/or check_relocs
1782 based on a conservative estimate of the PLT relocation
1783 count, because the sections must be created before the
1784 linker maps input sections to output sections. The
1785 linker does that before size_dynamic_sections, where we
1786 compute the exact size of the PLT, so there may be more
1787 of these sections than are actually needed. */
1788 s->flags |= SEC_EXCLUDE;
1790 else if ((s->flags & SEC_HAS_CONTENTS) != 0)
1792 /* Allocate memory for the section contents. */
1793 s->contents = (bfd_byte *) bfd_zalloc (dynobj, s->size);
1794 if (s->contents == NULL)
1799 if (elf_hash_table (info)->dynamic_sections_created)
1801 /* Add the special XTENSA_RTLD relocations now. The offsets won't be
1802 known until finish_dynamic_sections, but we need to get the relocs
1803 in place before they are sorted. */
1804 for (chunk = 0; chunk < plt_chunks; chunk++)
1806 Elf_Internal_Rela irela;
1810 irela.r_info = ELF32_R_INFO (0, R_XTENSA_RTLD);
1813 loc = (srelgot->contents
1814 + srelgot->reloc_count * sizeof (Elf32_External_Rela));
1815 bfd_elf32_swap_reloca_out (output_bfd, &irela, loc);
1816 bfd_elf32_swap_reloca_out (output_bfd, &irela,
1817 loc + sizeof (Elf32_External_Rela));
1818 srelgot->reloc_count += 2;
1821 /* Add some entries to the .dynamic section. We fill in the
1822 values later, in elf_xtensa_finish_dynamic_sections, but we
1823 must add the entries now so that we get the correct size for
1824 the .dynamic section. The DT_DEBUG entry is filled in by the
1825 dynamic linker and used by the debugger. */
1826 #define add_dynamic_entry(TAG, VAL) \
1827 _bfd_elf_add_dynamic_entry (info, TAG, VAL)
1829 if (bfd_link_executable (info))
1831 if (!add_dynamic_entry (DT_DEBUG, 0))
1837 if (!add_dynamic_entry (DT_PLTRELSZ, 0)
1838 || !add_dynamic_entry (DT_PLTREL, DT_RELA)
1839 || !add_dynamic_entry (DT_JMPREL, 0))
1845 if (!add_dynamic_entry (DT_RELA, 0)
1846 || !add_dynamic_entry (DT_RELASZ, 0)
1847 || !add_dynamic_entry (DT_RELAENT, sizeof (Elf32_External_Rela)))
1851 if (!add_dynamic_entry (DT_PLTGOT, 0)
1852 || !add_dynamic_entry (DT_XTENSA_GOT_LOC_OFF, 0)
1853 || !add_dynamic_entry (DT_XTENSA_GOT_LOC_SZ, 0))
1856 #undef add_dynamic_entry
1862 elf_xtensa_always_size_sections (bfd *output_bfd,
1863 struct bfd_link_info *info)
1865 struct elf_xtensa_link_hash_table *htab;
1868 htab = elf_xtensa_hash_table (info);
1872 tls_sec = htab->elf.tls_sec;
1874 if (tls_sec && (htab->tlsbase->tls_type & GOT_TLS_ANY) != 0)
1876 struct elf_link_hash_entry *tlsbase = &htab->tlsbase->elf;
1877 struct bfd_link_hash_entry *bh = &tlsbase->root;
1878 const struct elf_backend_data *bed = get_elf_backend_data (output_bfd);
1880 tlsbase->type = STT_TLS;
1881 if (!(_bfd_generic_link_add_one_symbol
1882 (info, output_bfd, "_TLS_MODULE_BASE_", BSF_LOCAL,
1883 tls_sec, 0, NULL, FALSE,
1884 bed->collect, &bh)))
1886 tlsbase->def_regular = 1;
1887 tlsbase->other = STV_HIDDEN;
1888 (*bed->elf_backend_hide_symbol) (info, tlsbase, TRUE);
1895 /* Return the base VMA address which should be subtracted from real addresses
1896 when resolving @dtpoff relocation.
1897 This is PT_TLS segment p_vaddr. */
1900 dtpoff_base (struct bfd_link_info *info)
1902 /* If tls_sec is NULL, we should have signalled an error already. */
1903 if (elf_hash_table (info)->tls_sec == NULL)
1905 return elf_hash_table (info)->tls_sec->vma;
1908 /* Return the relocation value for @tpoff relocation
1909 if STT_TLS virtual address is ADDRESS. */
1912 tpoff (struct bfd_link_info *info, bfd_vma address)
1914 struct elf_link_hash_table *htab = elf_hash_table (info);
1917 /* If tls_sec is NULL, we should have signalled an error already. */
1918 if (htab->tls_sec == NULL)
1920 base = align_power ((bfd_vma) TCB_SIZE, htab->tls_sec->alignment_power);
1921 return address - htab->tls_sec->vma + base;
1924 /* Perform the specified relocation. The instruction at (contents + address)
1925 is modified to set one operand to represent the value in "relocation". The
1926 operand position is determined by the relocation type recorded in the
1929 #define CALL_SEGMENT_BITS (30)
1930 #define CALL_SEGMENT_SIZE (1 << CALL_SEGMENT_BITS)
1932 static bfd_reloc_status_type
1933 elf_xtensa_do_reloc (reloc_howto_type *howto,
1935 asection *input_section,
1939 bfd_boolean is_weak_undef,
1940 char **error_message)
1943 xtensa_opcode opcode;
1944 xtensa_isa isa = xtensa_default_isa;
1945 static xtensa_insnbuf ibuff = NULL;
1946 static xtensa_insnbuf sbuff = NULL;
1947 bfd_vma self_address;
1948 bfd_size_type input_size;
1954 ibuff = xtensa_insnbuf_alloc (isa);
1955 sbuff = xtensa_insnbuf_alloc (isa);
1958 input_size = bfd_get_section_limit (abfd, input_section);
1960 /* Calculate the PC address for this instruction. */
1961 self_address = (input_section->output_section->vma
1962 + input_section->output_offset
1965 switch (howto->type)
1968 case R_XTENSA_DIFF8:
1969 case R_XTENSA_DIFF16:
1970 case R_XTENSA_DIFF32:
1971 case R_XTENSA_TLS_FUNC:
1972 case R_XTENSA_TLS_ARG:
1973 case R_XTENSA_TLS_CALL:
1974 return bfd_reloc_ok;
1976 case R_XTENSA_ASM_EXPAND:
1979 /* Check for windowed CALL across a 1GB boundary. */
1980 opcode = get_expanded_call_opcode (contents + address,
1981 input_size - address, 0);
1982 if (is_windowed_call_opcode (opcode))
1984 if ((self_address >> CALL_SEGMENT_BITS)
1985 != (relocation >> CALL_SEGMENT_BITS))
1987 *error_message = "windowed longcall crosses 1GB boundary; "
1989 return bfd_reloc_dangerous;
1993 return bfd_reloc_ok;
1995 case R_XTENSA_ASM_SIMPLIFY:
1997 /* Convert the L32R/CALLX to CALL. */
1998 bfd_reloc_status_type retval =
1999 elf_xtensa_do_asm_simplify (contents, address, input_size,
2001 if (retval != bfd_reloc_ok)
2002 return bfd_reloc_dangerous;
2004 /* The CALL needs to be relocated. Continue below for that part. */
2007 howto = &elf_howto_table[(unsigned) R_XTENSA_SLOT0_OP ];
2014 x = bfd_get_32 (abfd, contents + address);
2016 bfd_put_32 (abfd, x, contents + address);
2018 return bfd_reloc_ok;
2020 case R_XTENSA_32_PCREL:
2021 bfd_put_32 (abfd, relocation - self_address, contents + address);
2022 return bfd_reloc_ok;
2025 case R_XTENSA_TLSDESC_FN:
2026 case R_XTENSA_TLSDESC_ARG:
2027 case R_XTENSA_TLS_DTPOFF:
2028 case R_XTENSA_TLS_TPOFF:
2029 bfd_put_32 (abfd, relocation, contents + address);
2030 return bfd_reloc_ok;
2033 /* Only instruction slot-specific relocations handled below.... */
2034 slot = get_relocation_slot (howto->type);
2035 if (slot == XTENSA_UNDEFINED)
2037 *error_message = "unexpected relocation";
2038 return bfd_reloc_dangerous;
2041 /* Read the instruction into a buffer and decode the opcode. */
2042 xtensa_insnbuf_from_chars (isa, ibuff, contents + address,
2043 input_size - address);
2044 fmt = xtensa_format_decode (isa, ibuff);
2045 if (fmt == XTENSA_UNDEFINED)
2047 *error_message = "cannot decode instruction format";
2048 return bfd_reloc_dangerous;
2051 xtensa_format_get_slot (isa, fmt, slot, ibuff, sbuff);
2053 opcode = xtensa_opcode_decode (isa, fmt, slot, sbuff);
2054 if (opcode == XTENSA_UNDEFINED)
2056 *error_message = "cannot decode instruction opcode";
2057 return bfd_reloc_dangerous;
2060 /* Check for opcode-specific "alternate" relocations. */
2061 if (is_alt_relocation (howto->type))
2063 if (opcode == get_l32r_opcode ())
2065 /* Handle the special-case of non-PC-relative L32R instructions. */
2066 bfd *output_bfd = input_section->output_section->owner;
2067 asection *lit4_sec = bfd_get_section_by_name (output_bfd, ".lit4");
2070 *error_message = "relocation references missing .lit4 section";
2071 return bfd_reloc_dangerous;
2073 self_address = ((lit4_sec->vma & ~0xfff)
2074 + 0x40000 - 3); /* -3 to compensate for do_reloc */
2075 newval = relocation;
2078 else if (opcode == get_const16_opcode ())
2080 /* ALT used for high 16 bits. */
2081 newval = relocation >> 16;
2086 /* No other "alternate" relocations currently defined. */
2087 *error_message = "unexpected relocation";
2088 return bfd_reloc_dangerous;
2091 else /* Not an "alternate" relocation.... */
2093 if (opcode == get_const16_opcode ())
2095 newval = relocation & 0xffff;
2100 /* ...normal PC-relative relocation.... */
2102 /* Determine which operand is being relocated. */
2103 opnd = get_relocation_opnd (opcode, howto->type);
2104 if (opnd == XTENSA_UNDEFINED)
2106 *error_message = "unexpected relocation";
2107 return bfd_reloc_dangerous;
2110 if (!howto->pc_relative)
2112 *error_message = "expected PC-relative relocation";
2113 return bfd_reloc_dangerous;
2116 newval = relocation;
2120 /* Apply the relocation. */
2121 if (xtensa_operand_do_reloc (isa, opcode, opnd, &newval, self_address)
2122 || xtensa_operand_encode (isa, opcode, opnd, &newval)
2123 || xtensa_operand_set_field (isa, opcode, opnd, fmt, slot,
2126 const char *opname = xtensa_opcode_name (isa, opcode);
2129 msg = "cannot encode";
2130 if (is_direct_call_opcode (opcode))
2132 if ((relocation & 0x3) != 0)
2133 msg = "misaligned call target";
2135 msg = "call target out of range";
2137 else if (opcode == get_l32r_opcode ())
2139 if ((relocation & 0x3) != 0)
2140 msg = "misaligned literal target";
2141 else if (is_alt_relocation (howto->type))
2142 msg = "literal target out of range (too many literals)";
2143 else if (self_address > relocation)
2144 msg = "literal target out of range (try using text-section-literals)";
2146 msg = "literal placed after use";
2149 *error_message = vsprint_msg (opname, ": %s", strlen (msg) + 2, msg);
2150 return bfd_reloc_dangerous;
2153 /* Check for calls across 1GB boundaries. */
2154 if (is_direct_call_opcode (opcode)
2155 && is_windowed_call_opcode (opcode))
2157 if ((self_address >> CALL_SEGMENT_BITS)
2158 != (relocation >> CALL_SEGMENT_BITS))
2161 "windowed call crosses 1GB boundary; return may fail";
2162 return bfd_reloc_dangerous;
2166 /* Write the modified instruction back out of the buffer. */
2167 xtensa_format_set_slot (isa, fmt, slot, ibuff, sbuff);
2168 xtensa_insnbuf_to_chars (isa, ibuff, contents + address,
2169 input_size - address);
2170 return bfd_reloc_ok;
2175 vsprint_msg (const char *origmsg, const char *fmt, int arglen, ...)
2177 /* To reduce the size of the memory leak,
2178 we only use a single message buffer. */
2179 static bfd_size_type alloc_size = 0;
2180 static char *message = NULL;
2181 bfd_size_type orig_len, len = 0;
2182 bfd_boolean is_append;
2185 va_start (ap, arglen);
2187 is_append = (origmsg == message);
2189 orig_len = strlen (origmsg);
2190 len = orig_len + strlen (fmt) + arglen + 20;
2191 if (len > alloc_size)
2193 message = (char *) bfd_realloc_or_free (message, len);
2196 if (message != NULL)
2199 memcpy (message, origmsg, orig_len);
2200 vsprintf (message + orig_len, fmt, ap);
2207 /* This function is registered as the "special_function" in the
2208 Xtensa howto for handling simplify operations.
2209 bfd_perform_relocation / bfd_install_relocation use it to
2210 perform (install) the specified relocation. Since this replaces the code
2211 in bfd_perform_relocation, it is basically an Xtensa-specific,
2212 stripped-down version of bfd_perform_relocation. */
2214 static bfd_reloc_status_type
2215 bfd_elf_xtensa_reloc (bfd *abfd,
2216 arelent *reloc_entry,
2219 asection *input_section,
2221 char **error_message)
2224 bfd_reloc_status_type flag;
2225 bfd_size_type octets = reloc_entry->address * bfd_octets_per_byte (abfd);
2226 bfd_vma output_base = 0;
2227 reloc_howto_type *howto = reloc_entry->howto;
2228 asection *reloc_target_output_section;
2229 bfd_boolean is_weak_undef;
2231 if (!xtensa_default_isa)
2232 xtensa_default_isa = xtensa_isa_init (0, 0);
2234 /* ELF relocs are against symbols. If we are producing relocatable
2235 output, and the reloc is against an external symbol, the resulting
2236 reloc will also be against the same symbol. In such a case, we
2237 don't want to change anything about the way the reloc is handled,
2238 since it will all be done at final link time. This test is similar
2239 to what bfd_elf_generic_reloc does except that it lets relocs with
2240 howto->partial_inplace go through even if the addend is non-zero.
2241 (The real problem is that partial_inplace is set for XTENSA_32
2242 relocs to begin with, but that's a long story and there's little we
2243 can do about it now....) */
2245 if (output_bfd && (symbol->flags & BSF_SECTION_SYM) == 0)
2247 reloc_entry->address += input_section->output_offset;
2248 return bfd_reloc_ok;
2251 /* Is the address of the relocation really within the section? */
2252 if (reloc_entry->address > bfd_get_section_limit (abfd, input_section))
2253 return bfd_reloc_outofrange;
2255 /* Work out which section the relocation is targeted at and the
2256 initial relocation command value. */
2258 /* Get symbol value. (Common symbols are special.) */
2259 if (bfd_is_com_section (symbol->section))
2262 relocation = symbol->value;
2264 reloc_target_output_section = symbol->section->output_section;
2266 /* Convert input-section-relative symbol value to absolute. */
2267 if ((output_bfd && !howto->partial_inplace)
2268 || reloc_target_output_section == NULL)
2271 output_base = reloc_target_output_section->vma;
2273 relocation += output_base + symbol->section->output_offset;
2275 /* Add in supplied addend. */
2276 relocation += reloc_entry->addend;
2278 /* Here the variable relocation holds the final address of the
2279 symbol we are relocating against, plus any addend. */
2282 if (!howto->partial_inplace)
2284 /* This is a partial relocation, and we want to apply the relocation
2285 to the reloc entry rather than the raw data. Everything except
2286 relocations against section symbols has already been handled
2289 BFD_ASSERT (symbol->flags & BSF_SECTION_SYM);
2290 reloc_entry->addend = relocation;
2291 reloc_entry->address += input_section->output_offset;
2292 return bfd_reloc_ok;
2296 reloc_entry->address += input_section->output_offset;
2297 reloc_entry->addend = 0;
2301 is_weak_undef = (bfd_is_und_section (symbol->section)
2302 && (symbol->flags & BSF_WEAK) != 0);
2303 flag = elf_xtensa_do_reloc (howto, abfd, input_section, relocation,
2304 (bfd_byte *) data, (bfd_vma) octets,
2305 is_weak_undef, error_message);
2307 if (flag == bfd_reloc_dangerous)
2309 /* Add the symbol name to the error message. */
2310 if (! *error_message)
2311 *error_message = "";
2312 *error_message = vsprint_msg (*error_message, ": (%s + 0x%lx)",
2313 strlen (symbol->name) + 17,
2315 (unsigned long) reloc_entry->addend);
2322 /* Set up an entry in the procedure linkage table. */
2325 elf_xtensa_create_plt_entry (struct bfd_link_info *info,
2327 unsigned reloc_index)
2329 asection *splt, *sgotplt;
2330 bfd_vma plt_base, got_base;
2331 bfd_vma code_offset, lit_offset, abi_offset;
2334 chunk = reloc_index / PLT_ENTRIES_PER_CHUNK;
2335 splt = elf_xtensa_get_plt_section (info, chunk);
2336 sgotplt = elf_xtensa_get_gotplt_section (info, chunk);
2337 BFD_ASSERT (splt != NULL && sgotplt != NULL);
2339 plt_base = splt->output_section->vma + splt->output_offset;
2340 got_base = sgotplt->output_section->vma + sgotplt->output_offset;
2342 lit_offset = 8 + (reloc_index % PLT_ENTRIES_PER_CHUNK) * 4;
2343 code_offset = (reloc_index % PLT_ENTRIES_PER_CHUNK) * PLT_ENTRY_SIZE;
2345 /* Fill in the literal entry. This is the offset of the dynamic
2346 relocation entry. */
2347 bfd_put_32 (output_bfd, reloc_index * sizeof (Elf32_External_Rela),
2348 sgotplt->contents + lit_offset);
2350 /* Fill in the entry in the procedure linkage table. */
2351 memcpy (splt->contents + code_offset,
2352 (bfd_big_endian (output_bfd)
2353 ? elf_xtensa_be_plt_entry[XSHAL_ABI != XTHAL_ABI_WINDOWED]
2354 : elf_xtensa_le_plt_entry[XSHAL_ABI != XTHAL_ABI_WINDOWED]),
2356 abi_offset = XSHAL_ABI == XTHAL_ABI_WINDOWED ? 3 : 0;
2357 bfd_put_16 (output_bfd, l32r_offset (got_base + 0,
2358 plt_base + code_offset + abi_offset),
2359 splt->contents + code_offset + abi_offset + 1);
2360 bfd_put_16 (output_bfd, l32r_offset (got_base + 4,
2361 plt_base + code_offset + abi_offset + 3),
2362 splt->contents + code_offset + abi_offset + 4);
2363 bfd_put_16 (output_bfd, l32r_offset (got_base + lit_offset,
2364 plt_base + code_offset + abi_offset + 6),
2365 splt->contents + code_offset + abi_offset + 7);
2367 return plt_base + code_offset;
2371 static bfd_boolean get_indirect_call_dest_reg (xtensa_opcode, unsigned *);
2374 replace_tls_insn (Elf_Internal_Rela *rel,
2376 asection *input_section,
2378 bfd_boolean is_ld_model,
2379 char **error_message)
2381 static xtensa_insnbuf ibuff = NULL;
2382 static xtensa_insnbuf sbuff = NULL;
2383 xtensa_isa isa = xtensa_default_isa;
2385 xtensa_opcode old_op, new_op;
2386 bfd_size_type input_size;
2388 unsigned dest_reg, src_reg;
2392 ibuff = xtensa_insnbuf_alloc (isa);
2393 sbuff = xtensa_insnbuf_alloc (isa);
2396 input_size = bfd_get_section_limit (abfd, input_section);
2398 /* Read the instruction into a buffer and decode the opcode. */
2399 xtensa_insnbuf_from_chars (isa, ibuff, contents + rel->r_offset,
2400 input_size - rel->r_offset);
2401 fmt = xtensa_format_decode (isa, ibuff);
2402 if (fmt == XTENSA_UNDEFINED)
2404 *error_message = "cannot decode instruction format";
2408 BFD_ASSERT (xtensa_format_num_slots (isa, fmt) == 1);
2409 xtensa_format_get_slot (isa, fmt, 0, ibuff, sbuff);
2411 old_op = xtensa_opcode_decode (isa, fmt, 0, sbuff);
2412 if (old_op == XTENSA_UNDEFINED)
2414 *error_message = "cannot decode instruction opcode";
2418 r_type = ELF32_R_TYPE (rel->r_info);
2421 case R_XTENSA_TLS_FUNC:
2422 case R_XTENSA_TLS_ARG:
2423 if (old_op != get_l32r_opcode ()
2424 || xtensa_operand_get_field (isa, old_op, 0, fmt, 0,
2425 sbuff, &dest_reg) != 0)
2427 *error_message = "cannot extract L32R destination for TLS access";
2432 case R_XTENSA_TLS_CALL:
2433 if (! get_indirect_call_dest_reg (old_op, &dest_reg)
2434 || xtensa_operand_get_field (isa, old_op, 0, fmt, 0,
2435 sbuff, &src_reg) != 0)
2437 *error_message = "cannot extract CALLXn operands for TLS access";
2450 case R_XTENSA_TLS_FUNC:
2451 case R_XTENSA_TLS_ARG:
2452 /* Change the instruction to a NOP (or "OR a1, a1, a1" for older
2453 versions of Xtensa). */
2454 new_op = xtensa_opcode_lookup (isa, "nop");
2455 if (new_op == XTENSA_UNDEFINED)
2457 new_op = xtensa_opcode_lookup (isa, "or");
2458 if (new_op == XTENSA_UNDEFINED
2459 || xtensa_opcode_encode (isa, fmt, 0, sbuff, new_op) != 0
2460 || xtensa_operand_set_field (isa, new_op, 0, fmt, 0,
2462 || xtensa_operand_set_field (isa, new_op, 1, fmt, 0,
2464 || xtensa_operand_set_field (isa, new_op, 2, fmt, 0,
2467 *error_message = "cannot encode OR for TLS access";
2473 if (xtensa_opcode_encode (isa, fmt, 0, sbuff, new_op) != 0)
2475 *error_message = "cannot encode NOP for TLS access";
2481 case R_XTENSA_TLS_CALL:
2482 /* Read THREADPTR into the CALLX's return value register. */
2483 new_op = xtensa_opcode_lookup (isa, "rur.threadptr");
2484 if (new_op == XTENSA_UNDEFINED
2485 || xtensa_opcode_encode (isa, fmt, 0, sbuff, new_op) != 0
2486 || xtensa_operand_set_field (isa, new_op, 0, fmt, 0,
2487 sbuff, dest_reg + 2) != 0)
2489 *error_message = "cannot encode RUR.THREADPTR for TLS access";
2499 case R_XTENSA_TLS_FUNC:
2500 new_op = xtensa_opcode_lookup (isa, "rur.threadptr");
2501 if (new_op == XTENSA_UNDEFINED
2502 || xtensa_opcode_encode (isa, fmt, 0, sbuff, new_op) != 0
2503 || xtensa_operand_set_field (isa, new_op, 0, fmt, 0,
2504 sbuff, dest_reg) != 0)
2506 *error_message = "cannot encode RUR.THREADPTR for TLS access";
2511 case R_XTENSA_TLS_ARG:
2512 /* Nothing to do. Keep the original L32R instruction. */
2515 case R_XTENSA_TLS_CALL:
2516 /* Add the CALLX's src register (holding the THREADPTR value)
2517 to the first argument register (holding the offset) and put
2518 the result in the CALLX's return value register. */
2519 new_op = xtensa_opcode_lookup (isa, "add");
2520 if (new_op == XTENSA_UNDEFINED
2521 || xtensa_opcode_encode (isa, fmt, 0, sbuff, new_op) != 0
2522 || xtensa_operand_set_field (isa, new_op, 0, fmt, 0,
2523 sbuff, dest_reg + 2) != 0
2524 || xtensa_operand_set_field (isa, new_op, 1, fmt, 0,
2525 sbuff, dest_reg + 2) != 0
2526 || xtensa_operand_set_field (isa, new_op, 2, fmt, 0,
2527 sbuff, src_reg) != 0)
2529 *error_message = "cannot encode ADD for TLS access";
2536 xtensa_format_set_slot (isa, fmt, 0, ibuff, sbuff);
2537 xtensa_insnbuf_to_chars (isa, ibuff, contents + rel->r_offset,
2538 input_size - rel->r_offset);
2544 #define IS_XTENSA_TLS_RELOC(R_TYPE) \
2545 ((R_TYPE) == R_XTENSA_TLSDESC_FN \
2546 || (R_TYPE) == R_XTENSA_TLSDESC_ARG \
2547 || (R_TYPE) == R_XTENSA_TLS_DTPOFF \
2548 || (R_TYPE) == R_XTENSA_TLS_TPOFF \
2549 || (R_TYPE) == R_XTENSA_TLS_FUNC \
2550 || (R_TYPE) == R_XTENSA_TLS_ARG \
2551 || (R_TYPE) == R_XTENSA_TLS_CALL)
2553 /* Relocate an Xtensa ELF section. This is invoked by the linker for
2554 both relocatable and final links. */
2557 elf_xtensa_relocate_section (bfd *output_bfd,
2558 struct bfd_link_info *info,
2560 asection *input_section,
2562 Elf_Internal_Rela *relocs,
2563 Elf_Internal_Sym *local_syms,
2564 asection **local_sections)
2566 struct elf_xtensa_link_hash_table *htab;
2567 Elf_Internal_Shdr *symtab_hdr;
2568 Elf_Internal_Rela *rel;
2569 Elf_Internal_Rela *relend;
2570 struct elf_link_hash_entry **sym_hashes;
2571 property_table_entry *lit_table = 0;
2573 char *local_got_tls_types;
2574 char *error_message = NULL;
2575 bfd_size_type input_size;
2578 if (!xtensa_default_isa)
2579 xtensa_default_isa = xtensa_isa_init (0, 0);
2581 BFD_ASSERT (is_xtensa_elf (input_bfd));
2583 htab = elf_xtensa_hash_table (info);
2587 symtab_hdr = &elf_tdata (input_bfd)->symtab_hdr;
2588 sym_hashes = elf_sym_hashes (input_bfd);
2589 local_got_tls_types = elf_xtensa_local_got_tls_type (input_bfd);
2591 if (elf_hash_table (info)->dynamic_sections_created)
2593 ltblsize = xtensa_read_table_entries (input_bfd, input_section,
2594 &lit_table, XTENSA_LIT_SEC_NAME,
2600 input_size = bfd_get_section_limit (input_bfd, input_section);
2603 relend = relocs + input_section->reloc_count;
2604 for (; rel < relend; rel++)
2607 reloc_howto_type *howto;
2608 unsigned long r_symndx;
2609 struct elf_link_hash_entry *h;
2610 Elf_Internal_Sym *sym;
2615 bfd_reloc_status_type r;
2616 bfd_boolean is_weak_undef;
2617 bfd_boolean unresolved_reloc;
2619 bfd_boolean dynamic_symbol;
2621 r_type = ELF32_R_TYPE (rel->r_info);
2622 if (r_type == (int) R_XTENSA_GNU_VTINHERIT
2623 || r_type == (int) R_XTENSA_GNU_VTENTRY)
2626 if (r_type < 0 || r_type >= (int) R_XTENSA_max)
2628 bfd_set_error (bfd_error_bad_value);
2631 howto = &elf_howto_table[r_type];
2633 r_symndx = ELF32_R_SYM (rel->r_info);
2638 is_weak_undef = FALSE;
2639 unresolved_reloc = FALSE;
2642 if (howto->partial_inplace && !bfd_link_relocatable (info))
2644 /* Because R_XTENSA_32 was made partial_inplace to fix some
2645 problems with DWARF info in partial links, there may be
2646 an addend stored in the contents. Take it out of there
2647 and move it back into the addend field of the reloc. */
2648 rel->r_addend += bfd_get_32 (input_bfd, contents + rel->r_offset);
2649 bfd_put_32 (input_bfd, 0, contents + rel->r_offset);
2652 if (r_symndx < symtab_hdr->sh_info)
2654 sym = local_syms + r_symndx;
2655 sym_type = ELF32_ST_TYPE (sym->st_info);
2656 sec = local_sections[r_symndx];
2657 relocation = _bfd_elf_rela_local_sym (output_bfd, sym, &sec, rel);
2661 bfd_boolean ignored;
2663 RELOC_FOR_GLOBAL_SYMBOL (info, input_bfd, input_section, rel,
2664 r_symndx, symtab_hdr, sym_hashes,
2666 unresolved_reloc, warned, ignored);
2669 && !unresolved_reloc
2670 && h->root.type == bfd_link_hash_undefweak)
2671 is_weak_undef = TRUE;
2676 if (sec != NULL && discarded_section (sec))
2677 RELOC_AGAINST_DISCARDED_SECTION (info, input_bfd, input_section,
2678 rel, 1, relend, howto, 0, contents);
2680 if (bfd_link_relocatable (info))
2683 asection * sym_sec = get_elf_r_symndx_section (input_bfd, r_symndx);
2685 /* This is a relocatable link.
2686 1) If the reloc is against a section symbol, adjust
2687 according to the output section.
2688 2) If there is a new target for this relocation,
2689 the new target will be in the same output section.
2690 We adjust the relocation by the output section
2693 if (relaxing_section)
2695 /* Check if this references a section in another input file. */
2696 if (!do_fix_for_relocatable_link (rel, input_bfd, input_section,
2701 dest_addr = sym_sec->output_section->vma + sym_sec->output_offset
2702 + get_elf_r_symndx_offset (input_bfd, r_symndx) + rel->r_addend;
2704 if (r_type == R_XTENSA_ASM_SIMPLIFY)
2706 error_message = NULL;
2707 /* Convert ASM_SIMPLIFY into the simpler relocation
2708 so that they never escape a relaxing link. */
2709 r = contract_asm_expansion (contents, input_size, rel,
2711 if (r != bfd_reloc_ok)
2712 (*info->callbacks->reloc_dangerous)
2713 (info, error_message,
2714 input_bfd, input_section, rel->r_offset);
2716 r_type = ELF32_R_TYPE (rel->r_info);
2719 /* This is a relocatable link, so we don't have to change
2720 anything unless the reloc is against a section symbol,
2721 in which case we have to adjust according to where the
2722 section symbol winds up in the output section. */
2723 if (r_symndx < symtab_hdr->sh_info)
2725 sym = local_syms + r_symndx;
2726 if (ELF_ST_TYPE (sym->st_info) == STT_SECTION)
2728 sec = local_sections[r_symndx];
2729 rel->r_addend += sec->output_offset + sym->st_value;
2733 /* If there is an addend with a partial_inplace howto,
2734 then move the addend to the contents. This is a hack
2735 to work around problems with DWARF in relocatable links
2736 with some previous version of BFD. Now we can't easily get
2737 rid of the hack without breaking backward compatibility.... */
2739 howto = &elf_howto_table[r_type];
2740 if (howto->partial_inplace && rel->r_addend)
2742 r = elf_xtensa_do_reloc (howto, input_bfd, input_section,
2743 rel->r_addend, contents,
2744 rel->r_offset, FALSE,
2750 /* Put the correct bits in the target instruction, even
2751 though the relocation will still be present in the output
2752 file. This makes disassembly clearer, as well as
2753 allowing loadable kernel modules to work without needing
2754 relocations on anything other than calls and l32r's. */
2756 /* If it is not in the same section, there is nothing we can do. */
2757 if (r_type >= R_XTENSA_SLOT0_OP && r_type <= R_XTENSA_SLOT14_OP &&
2758 sym_sec->output_section == input_section->output_section)
2760 r = elf_xtensa_do_reloc (howto, input_bfd, input_section,
2761 dest_addr, contents,
2762 rel->r_offset, FALSE,
2766 if (r != bfd_reloc_ok)
2767 (*info->callbacks->reloc_dangerous)
2768 (info, error_message,
2769 input_bfd, input_section, rel->r_offset);
2771 /* Done with work for relocatable link; continue with next reloc. */
2775 /* This is a final link. */
2777 if (relaxing_section)
2779 /* Check if this references a section in another input file. */
2780 do_fix_for_final_link (rel, input_bfd, input_section, contents,
2784 /* Sanity check the address. */
2785 if (rel->r_offset >= input_size
2786 && ELF32_R_TYPE (rel->r_info) != R_XTENSA_NONE)
2789 /* xgettext:c-format */
2790 (_("%B(%A+%#Lx): relocation offset out of range (size=%#Lx)"),
2791 input_bfd, input_section, rel->r_offset, input_size);
2792 bfd_set_error (bfd_error_bad_value);
2797 name = h->root.root.string;
2800 name = (bfd_elf_string_from_elf_section
2801 (input_bfd, symtab_hdr->sh_link, sym->st_name));
2802 if (name == NULL || *name == '\0')
2803 name = bfd_section_name (input_bfd, sec);
2806 if (r_symndx != STN_UNDEF
2807 && r_type != R_XTENSA_NONE
2809 || h->root.type == bfd_link_hash_defined
2810 || h->root.type == bfd_link_hash_defweak)
2811 && IS_XTENSA_TLS_RELOC (r_type) != (sym_type == STT_TLS))
2814 ((sym_type == STT_TLS
2815 /* xgettext:c-format */
2816 ? _("%B(%A+%#Lx): %s used with TLS symbol %s")
2817 /* xgettext:c-format */
2818 : _("%B(%A+%#Lx): %s used with non-TLS symbol %s")),
2826 dynamic_symbol = elf_xtensa_dynamic_symbol_p (h, info);
2828 tls_type = GOT_UNKNOWN;
2830 tls_type = elf_xtensa_hash_entry (h)->tls_type;
2831 else if (local_got_tls_types)
2832 tls_type = local_got_tls_types [r_symndx];
2838 if (elf_hash_table (info)->dynamic_sections_created
2839 && (input_section->flags & SEC_ALLOC) != 0
2840 && (dynamic_symbol || bfd_link_pic (info)))
2842 Elf_Internal_Rela outrel;
2846 if (dynamic_symbol && r_type == R_XTENSA_PLT)
2847 srel = htab->elf.srelplt;
2849 srel = htab->elf.srelgot;
2851 BFD_ASSERT (srel != NULL);
2854 _bfd_elf_section_offset (output_bfd, info,
2855 input_section, rel->r_offset);
2857 if ((outrel.r_offset | 1) == (bfd_vma) -1)
2858 memset (&outrel, 0, sizeof outrel);
2861 outrel.r_offset += (input_section->output_section->vma
2862 + input_section->output_offset);
2864 /* Complain if the relocation is in a read-only section
2865 and not in a literal pool. */
2866 if ((input_section->flags & SEC_READONLY) != 0
2867 && !elf_xtensa_in_literal_pool (lit_table, ltblsize,
2871 _("dynamic relocation in read-only section");
2872 (*info->callbacks->reloc_dangerous)
2873 (info, error_message,
2874 input_bfd, input_section, rel->r_offset);
2879 outrel.r_addend = rel->r_addend;
2882 if (r_type == R_XTENSA_32)
2885 ELF32_R_INFO (h->dynindx, R_XTENSA_GLOB_DAT);
2888 else /* r_type == R_XTENSA_PLT */
2891 ELF32_R_INFO (h->dynindx, R_XTENSA_JMP_SLOT);
2893 /* Create the PLT entry and set the initial
2894 contents of the literal entry to the address of
2897 elf_xtensa_create_plt_entry (info, output_bfd,
2900 unresolved_reloc = FALSE;
2904 /* Generate a RELATIVE relocation. */
2905 outrel.r_info = ELF32_R_INFO (0, R_XTENSA_RELATIVE);
2906 outrel.r_addend = 0;
2910 loc = (srel->contents
2911 + srel->reloc_count++ * sizeof (Elf32_External_Rela));
2912 bfd_elf32_swap_reloca_out (output_bfd, &outrel, loc);
2913 BFD_ASSERT (sizeof (Elf32_External_Rela) * srel->reloc_count
2916 else if (r_type == R_XTENSA_ASM_EXPAND && dynamic_symbol)
2918 /* This should only happen for non-PIC code, which is not
2919 supposed to be used on systems with dynamic linking.
2920 Just ignore these relocations. */
2925 case R_XTENSA_TLS_TPOFF:
2926 /* Switch to LE model for local symbols in an executable. */
2927 if (! bfd_link_pic (info) && ! dynamic_symbol)
2929 relocation = tpoff (info, relocation);
2934 case R_XTENSA_TLSDESC_FN:
2935 case R_XTENSA_TLSDESC_ARG:
2937 if (r_type == R_XTENSA_TLSDESC_FN)
2939 if (! bfd_link_pic (info) || (tls_type & GOT_TLS_IE) != 0)
2940 r_type = R_XTENSA_NONE;
2942 else if (r_type == R_XTENSA_TLSDESC_ARG)
2944 if (bfd_link_pic (info))
2946 if ((tls_type & GOT_TLS_IE) != 0)
2947 r_type = R_XTENSA_TLS_TPOFF;
2951 r_type = R_XTENSA_TLS_TPOFF;
2952 if (! dynamic_symbol)
2954 relocation = tpoff (info, relocation);
2960 if (r_type == R_XTENSA_NONE)
2961 /* Nothing to do here; skip to the next reloc. */
2964 if (! elf_hash_table (info)->dynamic_sections_created)
2967 _("TLS relocation invalid without dynamic sections");
2968 (*info->callbacks->reloc_dangerous)
2969 (info, error_message,
2970 input_bfd, input_section, rel->r_offset);
2974 Elf_Internal_Rela outrel;
2976 asection *srel = htab->elf.srelgot;
2979 outrel.r_offset = (input_section->output_section->vma
2980 + input_section->output_offset
2983 /* Complain if the relocation is in a read-only section
2984 and not in a literal pool. */
2985 if ((input_section->flags & SEC_READONLY) != 0
2986 && ! elf_xtensa_in_literal_pool (lit_table, ltblsize,
2990 _("dynamic relocation in read-only section");
2991 (*info->callbacks->reloc_dangerous)
2992 (info, error_message,
2993 input_bfd, input_section, rel->r_offset);
2996 indx = h && h->dynindx != -1 ? h->dynindx : 0;
2998 outrel.r_addend = relocation - dtpoff_base (info);
3000 outrel.r_addend = 0;
3003 outrel.r_info = ELF32_R_INFO (indx, r_type);
3005 unresolved_reloc = FALSE;
3008 loc = (srel->contents
3009 + srel->reloc_count++ * sizeof (Elf32_External_Rela));
3010 bfd_elf32_swap_reloca_out (output_bfd, &outrel, loc);
3011 BFD_ASSERT (sizeof (Elf32_External_Rela) * srel->reloc_count
3017 case R_XTENSA_TLS_DTPOFF:
3018 if (! bfd_link_pic (info))
3019 /* Switch from LD model to LE model. */
3020 relocation = tpoff (info, relocation);
3022 relocation -= dtpoff_base (info);
3025 case R_XTENSA_TLS_FUNC:
3026 case R_XTENSA_TLS_ARG:
3027 case R_XTENSA_TLS_CALL:
3028 /* Check if optimizing to IE or LE model. */
3029 if ((tls_type & GOT_TLS_IE) != 0)
3031 bfd_boolean is_ld_model =
3032 (h && elf_xtensa_hash_entry (h) == htab->tlsbase);
3033 if (! replace_tls_insn (rel, input_bfd, input_section, contents,
3034 is_ld_model, &error_message))
3035 (*info->callbacks->reloc_dangerous)
3036 (info, error_message,
3037 input_bfd, input_section, rel->r_offset);
3039 if (r_type != R_XTENSA_TLS_ARG || is_ld_model)
3041 /* Skip subsequent relocations on the same instruction. */
3042 while (rel + 1 < relend && rel[1].r_offset == rel->r_offset)
3049 if (elf_hash_table (info)->dynamic_sections_created
3050 && dynamic_symbol && (is_operand_relocation (r_type)
3051 || r_type == R_XTENSA_32_PCREL))
3054 vsprint_msg ("invalid relocation for dynamic symbol", ": %s",
3055 strlen (name) + 2, name);
3056 (*info->callbacks->reloc_dangerous)
3057 (info, error_message, input_bfd, input_section, rel->r_offset);
3063 /* Dynamic relocs are not propagated for SEC_DEBUGGING sections
3064 because such sections are not SEC_ALLOC and thus ld.so will
3065 not process them. */
3066 if (unresolved_reloc
3067 && !((input_section->flags & SEC_DEBUGGING) != 0
3069 && _bfd_elf_section_offset (output_bfd, info, input_section,
3070 rel->r_offset) != (bfd_vma) -1)
3073 /* xgettext:c-format */
3074 (_("%B(%A+%#Lx): unresolvable %s relocation against symbol `%s'"),
3083 /* TLS optimizations may have changed r_type; update "howto". */
3084 howto = &elf_howto_table[r_type];
3086 /* There's no point in calling bfd_perform_relocation here.
3087 Just go directly to our "special function". */
3088 r = elf_xtensa_do_reloc (howto, input_bfd, input_section,
3089 relocation + rel->r_addend,
3090 contents, rel->r_offset, is_weak_undef,
3093 if (r != bfd_reloc_ok && !warned)
3095 BFD_ASSERT (r == bfd_reloc_dangerous || r == bfd_reloc_other);
3096 BFD_ASSERT (error_message != NULL);
3098 if (rel->r_addend == 0)
3099 error_message = vsprint_msg (error_message, ": %s",
3100 strlen (name) + 2, name);
3102 error_message = vsprint_msg (error_message, ": (%s+0x%x)",
3104 name, (int) rel->r_addend);
3106 (*info->callbacks->reloc_dangerous)
3107 (info, error_message, input_bfd, input_section, rel->r_offset);
3114 input_section->reloc_done = TRUE;
3120 /* Finish up dynamic symbol handling. There's not much to do here since
3121 the PLT and GOT entries are all set up by relocate_section. */
3124 elf_xtensa_finish_dynamic_symbol (bfd *output_bfd ATTRIBUTE_UNUSED,
3125 struct bfd_link_info *info ATTRIBUTE_UNUSED,
3126 struct elf_link_hash_entry *h,
3127 Elf_Internal_Sym *sym)
3129 if (h->needs_plt && !h->def_regular)
3131 /* Mark the symbol as undefined, rather than as defined in
3132 the .plt section. Leave the value alone. */
3133 sym->st_shndx = SHN_UNDEF;
3134 /* If the symbol is weak, we do need to clear the value.
3135 Otherwise, the PLT entry would provide a definition for
3136 the symbol even if the symbol wasn't defined anywhere,
3137 and so the symbol would never be NULL. */
3138 if (!h->ref_regular_nonweak)
3142 /* Mark _DYNAMIC and _GLOBAL_OFFSET_TABLE_ as absolute. */
3143 if (h == elf_hash_table (info)->hdynamic
3144 || h == elf_hash_table (info)->hgot)
3145 sym->st_shndx = SHN_ABS;
3151 /* Combine adjacent literal table entries in the output. Adjacent
3152 entries within each input section may have been removed during
3153 relaxation, but we repeat the process here, even though it's too late
3154 to shrink the output section, because it's important to minimize the
3155 number of literal table entries to reduce the start-up work for the
3156 runtime linker. Returns the number of remaining table entries or -1
3160 elf_xtensa_combine_prop_entries (bfd *output_bfd,
3165 property_table_entry *table;
3166 bfd_size_type section_size, sgotloc_size;
3170 section_size = sxtlit->size;
3171 BFD_ASSERT (section_size % 8 == 0);
3172 num = section_size / 8;
3174 sgotloc_size = sgotloc->size;
3175 if (sgotloc_size != section_size)
3178 (_("internal inconsistency in size of .got.loc section"));
3182 table = bfd_malloc (num * sizeof (property_table_entry));
3186 /* The ".xt.lit.plt" section has the SEC_IN_MEMORY flag set and this
3187 propagates to the output section, where it doesn't really apply and
3188 where it breaks the following call to bfd_malloc_and_get_section. */
3189 sxtlit->flags &= ~SEC_IN_MEMORY;
3191 if (!bfd_malloc_and_get_section (output_bfd, sxtlit, &contents))
3199 /* There should never be any relocations left at this point, so this
3200 is quite a bit easier than what is done during relaxation. */
3202 /* Copy the raw contents into a property table array and sort it. */
3204 for (n = 0; n < num; n++)
3206 table[n].address = bfd_get_32 (output_bfd, &contents[offset]);
3207 table[n].size = bfd_get_32 (output_bfd, &contents[offset + 4]);
3210 qsort (table, num, sizeof (property_table_entry), property_table_compare);
3212 for (n = 0; n < num; n++)
3214 bfd_boolean remove_entry = FALSE;
3216 if (table[n].size == 0)
3217 remove_entry = TRUE;
3219 && (table[n-1].address + table[n-1].size == table[n].address))
3221 table[n-1].size += table[n].size;
3222 remove_entry = TRUE;
3227 for (m = n; m < num - 1; m++)
3229 table[m].address = table[m+1].address;
3230 table[m].size = table[m+1].size;
3238 /* Copy the data back to the raw contents. */
3240 for (n = 0; n < num; n++)
3242 bfd_put_32 (output_bfd, table[n].address, &contents[offset]);
3243 bfd_put_32 (output_bfd, table[n].size, &contents[offset + 4]);
3247 /* Clear the removed bytes. */
3248 if ((bfd_size_type) (num * 8) < section_size)
3249 memset (&contents[num * 8], 0, section_size - num * 8);
3251 if (! bfd_set_section_contents (output_bfd, sxtlit, contents, 0,
3255 /* Copy the contents to ".got.loc". */
3256 memcpy (sgotloc->contents, contents, section_size);
3264 /* Finish up the dynamic sections. */
3267 elf_xtensa_finish_dynamic_sections (bfd *output_bfd,
3268 struct bfd_link_info *info)
3270 struct elf_xtensa_link_hash_table *htab;
3272 asection *sdyn, *srelplt, *sgot, *sxtlit, *sgotloc;
3273 Elf32_External_Dyn *dyncon, *dynconend;
3274 int num_xtlit_entries = 0;
3276 if (! elf_hash_table (info)->dynamic_sections_created)
3279 htab = elf_xtensa_hash_table (info);
3283 dynobj = elf_hash_table (info)->dynobj;
3284 sdyn = bfd_get_linker_section (dynobj, ".dynamic");
3285 BFD_ASSERT (sdyn != NULL);
3287 /* Set the first entry in the global offset table to the address of
3288 the dynamic section. */
3289 sgot = htab->elf.sgot;
3292 BFD_ASSERT (sgot->size == 4);
3294 bfd_put_32 (output_bfd, 0, sgot->contents);
3296 bfd_put_32 (output_bfd,
3297 sdyn->output_section->vma + sdyn->output_offset,
3301 srelplt = htab->elf.srelplt;
3302 if (srelplt && srelplt->size != 0)
3304 asection *sgotplt, *srelgot, *spltlittbl;
3305 int chunk, plt_chunks, plt_entries;
3306 Elf_Internal_Rela irela;
3308 unsigned rtld_reloc;
3310 srelgot = htab->elf.srelgot;
3311 spltlittbl = htab->spltlittbl;
3312 BFD_ASSERT (srelgot != NULL && spltlittbl != NULL);
3314 /* Find the first XTENSA_RTLD relocation. Presumably the rest
3315 of them follow immediately after.... */
3316 for (rtld_reloc = 0; rtld_reloc < srelgot->reloc_count; rtld_reloc++)
3318 loc = srelgot->contents + rtld_reloc * sizeof (Elf32_External_Rela);
3319 bfd_elf32_swap_reloca_in (output_bfd, loc, &irela);
3320 if (ELF32_R_TYPE (irela.r_info) == R_XTENSA_RTLD)
3323 BFD_ASSERT (rtld_reloc < srelgot->reloc_count);
3325 plt_entries = srelplt->size / sizeof (Elf32_External_Rela);
3327 (plt_entries + PLT_ENTRIES_PER_CHUNK - 1) / PLT_ENTRIES_PER_CHUNK;
3329 for (chunk = 0; chunk < plt_chunks; chunk++)
3331 int chunk_entries = 0;
3333 sgotplt = elf_xtensa_get_gotplt_section (info, chunk);
3334 BFD_ASSERT (sgotplt != NULL);
3336 /* Emit special RTLD relocations for the first two entries in
3337 each chunk of the .got.plt section. */
3339 loc = srelgot->contents + rtld_reloc * sizeof (Elf32_External_Rela);
3340 bfd_elf32_swap_reloca_in (output_bfd, loc, &irela);
3341 BFD_ASSERT (ELF32_R_TYPE (irela.r_info) == R_XTENSA_RTLD);
3342 irela.r_offset = (sgotplt->output_section->vma
3343 + sgotplt->output_offset);
3344 irela.r_addend = 1; /* tell rtld to set value to resolver function */
3345 bfd_elf32_swap_reloca_out (output_bfd, &irela, loc);
3347 BFD_ASSERT (rtld_reloc <= srelgot->reloc_count);
3349 /* Next literal immediately follows the first. */
3350 loc += sizeof (Elf32_External_Rela);
3351 bfd_elf32_swap_reloca_in (output_bfd, loc, &irela);
3352 BFD_ASSERT (ELF32_R_TYPE (irela.r_info) == R_XTENSA_RTLD);
3353 irela.r_offset = (sgotplt->output_section->vma
3354 + sgotplt->output_offset + 4);
3355 /* Tell rtld to set value to object's link map. */
3357 bfd_elf32_swap_reloca_out (output_bfd, &irela, loc);
3359 BFD_ASSERT (rtld_reloc <= srelgot->reloc_count);
3361 /* Fill in the literal table. */
3362 if (chunk < plt_chunks - 1)
3363 chunk_entries = PLT_ENTRIES_PER_CHUNK;
3365 chunk_entries = plt_entries - (chunk * PLT_ENTRIES_PER_CHUNK);
3367 BFD_ASSERT ((unsigned) (chunk + 1) * 8 <= spltlittbl->size);
3368 bfd_put_32 (output_bfd,
3369 sgotplt->output_section->vma + sgotplt->output_offset,
3370 spltlittbl->contents + (chunk * 8) + 0);
3371 bfd_put_32 (output_bfd,
3372 8 + (chunk_entries * 4),
3373 spltlittbl->contents + (chunk * 8) + 4);
3376 /* All the dynamic relocations have been emitted at this point.
3377 Make sure the relocation sections are the correct size. */
3378 if (srelgot->size != (sizeof (Elf32_External_Rela)
3379 * srelgot->reloc_count)
3380 || srelplt->size != (sizeof (Elf32_External_Rela)
3381 * srelplt->reloc_count))
3384 /* The .xt.lit.plt section has just been modified. This must
3385 happen before the code below which combines adjacent literal
3386 table entries, and the .xt.lit.plt contents have to be forced to
3388 if (! bfd_set_section_contents (output_bfd,
3389 spltlittbl->output_section,
3390 spltlittbl->contents,
3391 spltlittbl->output_offset,
3394 /* Clear SEC_HAS_CONTENTS so the contents won't be output again. */
3395 spltlittbl->flags &= ~SEC_HAS_CONTENTS;
3398 /* Combine adjacent literal table entries. */
3399 BFD_ASSERT (! bfd_link_relocatable (info));
3400 sxtlit = bfd_get_section_by_name (output_bfd, ".xt.lit");
3401 sgotloc = htab->sgotloc;
3402 BFD_ASSERT (sgotloc);
3406 elf_xtensa_combine_prop_entries (output_bfd, sxtlit, sgotloc);
3407 if (num_xtlit_entries < 0)
3411 dyncon = (Elf32_External_Dyn *) sdyn->contents;
3412 dynconend = (Elf32_External_Dyn *) (sdyn->contents + sdyn->size);
3413 for (; dyncon < dynconend; dyncon++)
3415 Elf_Internal_Dyn dyn;
3417 bfd_elf32_swap_dyn_in (dynobj, dyncon, &dyn);
3424 case DT_XTENSA_GOT_LOC_SZ:
3425 dyn.d_un.d_val = num_xtlit_entries;
3428 case DT_XTENSA_GOT_LOC_OFF:
3429 dyn.d_un.d_ptr = (htab->sgotloc->output_section->vma
3430 + htab->sgotloc->output_offset);
3434 dyn.d_un.d_ptr = (htab->elf.sgot->output_section->vma
3435 + htab->elf.sgot->output_offset);
3439 dyn.d_un.d_ptr = (htab->elf.srelplt->output_section->vma
3440 + htab->elf.srelplt->output_offset);
3444 dyn.d_un.d_val = htab->elf.srelplt->size;
3448 bfd_elf32_swap_dyn_out (output_bfd, &dyn, dyncon);
3455 /* Functions for dealing with the e_flags field. */
3457 /* Merge backend specific data from an object file to the output
3458 object file when linking. */
3461 elf_xtensa_merge_private_bfd_data (bfd *ibfd, struct bfd_link_info *info)
3463 bfd *obfd = info->output_bfd;
3464 unsigned out_mach, in_mach;
3465 flagword out_flag, in_flag;
3467 /* Check if we have the same endianness. */
3468 if (!_bfd_generic_verify_endian_match (ibfd, info))
3471 /* Don't even pretend to support mixed-format linking. */
3472 if (bfd_get_flavour (ibfd) != bfd_target_elf_flavour
3473 || bfd_get_flavour (obfd) != bfd_target_elf_flavour)
3476 out_flag = elf_elfheader (obfd)->e_flags;
3477 in_flag = elf_elfheader (ibfd)->e_flags;
3479 out_mach = out_flag & EF_XTENSA_MACH;
3480 in_mach = in_flag & EF_XTENSA_MACH;
3481 if (out_mach != in_mach)
3484 /* xgettext:c-format */
3485 (_("%B: incompatible machine type. Output is 0x%x. Input is 0x%x"),
3486 ibfd, out_mach, in_mach);
3487 bfd_set_error (bfd_error_wrong_format);
3491 if (! elf_flags_init (obfd))
3493 elf_flags_init (obfd) = TRUE;
3494 elf_elfheader (obfd)->e_flags = in_flag;
3496 if (bfd_get_arch (obfd) == bfd_get_arch (ibfd)
3497 && bfd_get_arch_info (obfd)->the_default)
3498 return bfd_set_arch_mach (obfd, bfd_get_arch (ibfd),
3499 bfd_get_mach (ibfd));
3504 if ((out_flag & EF_XTENSA_XT_INSN) != (in_flag & EF_XTENSA_XT_INSN))
3505 elf_elfheader (obfd)->e_flags &= (~ EF_XTENSA_XT_INSN);
3507 if ((out_flag & EF_XTENSA_XT_LIT) != (in_flag & EF_XTENSA_XT_LIT))
3508 elf_elfheader (obfd)->e_flags &= (~ EF_XTENSA_XT_LIT);
3515 elf_xtensa_set_private_flags (bfd *abfd, flagword flags)
3517 BFD_ASSERT (!elf_flags_init (abfd)
3518 || elf_elfheader (abfd)->e_flags == flags);
3520 elf_elfheader (abfd)->e_flags |= flags;
3521 elf_flags_init (abfd) = TRUE;
3528 elf_xtensa_print_private_bfd_data (bfd *abfd, void *farg)
3530 FILE *f = (FILE *) farg;
3531 flagword e_flags = elf_elfheader (abfd)->e_flags;
3533 fprintf (f, "\nXtensa header:\n");
3534 if ((e_flags & EF_XTENSA_MACH) == E_XTENSA_MACH)
3535 fprintf (f, "\nMachine = Base\n");
3537 fprintf (f, "\nMachine Id = 0x%x\n", e_flags & EF_XTENSA_MACH);
3539 fprintf (f, "Insn tables = %s\n",
3540 (e_flags & EF_XTENSA_XT_INSN) ? "true" : "false");
3542 fprintf (f, "Literal tables = %s\n",
3543 (e_flags & EF_XTENSA_XT_LIT) ? "true" : "false");
3545 return _bfd_elf_print_private_bfd_data (abfd, farg);
3549 /* Set the right machine number for an Xtensa ELF file. */
3552 elf_xtensa_object_p (bfd *abfd)
3555 unsigned long arch = elf_elfheader (abfd)->e_flags & EF_XTENSA_MACH;
3560 mach = bfd_mach_xtensa;
3566 (void) bfd_default_set_arch_mach (abfd, bfd_arch_xtensa, mach);
3571 /* The final processing done just before writing out an Xtensa ELF object
3572 file. This gets the Xtensa architecture right based on the machine
3576 elf_xtensa_final_write_processing (bfd *abfd,
3577 bfd_boolean linker ATTRIBUTE_UNUSED)
3582 switch (mach = bfd_get_mach (abfd))
3584 case bfd_mach_xtensa:
3585 val = E_XTENSA_MACH;
3591 elf_elfheader (abfd)->e_flags &= (~ EF_XTENSA_MACH);
3592 elf_elfheader (abfd)->e_flags |= val;
3596 static enum elf_reloc_type_class
3597 elf_xtensa_reloc_type_class (const struct bfd_link_info *info ATTRIBUTE_UNUSED,
3598 const asection *rel_sec ATTRIBUTE_UNUSED,
3599 const Elf_Internal_Rela *rela)
3601 switch ((int) ELF32_R_TYPE (rela->r_info))
3603 case R_XTENSA_RELATIVE:
3604 return reloc_class_relative;
3605 case R_XTENSA_JMP_SLOT:
3606 return reloc_class_plt;
3608 return reloc_class_normal;
3614 elf_xtensa_discard_info_for_section (bfd *abfd,
3615 struct elf_reloc_cookie *cookie,
3616 struct bfd_link_info *info,
3620 bfd_vma offset, actual_offset;
3621 bfd_size_type removed_bytes = 0;
3622 bfd_size_type entry_size;
3624 if (sec->output_section
3625 && bfd_is_abs_section (sec->output_section))
3628 if (xtensa_is_proptable_section (sec))
3633 if (sec->size == 0 || sec->size % entry_size != 0)
3636 contents = retrieve_contents (abfd, sec, info->keep_memory);
3640 cookie->rels = retrieve_internal_relocs (abfd, sec, info->keep_memory);
3643 release_contents (sec, contents);
3647 /* Sort the relocations. They should already be in order when
3648 relaxation is enabled, but it might not be. */
3649 qsort (cookie->rels, sec->reloc_count, sizeof (Elf_Internal_Rela),
3650 internal_reloc_compare);
3652 cookie->rel = cookie->rels;
3653 cookie->relend = cookie->rels + sec->reloc_count;
3655 for (offset = 0; offset < sec->size; offset += entry_size)
3657 actual_offset = offset - removed_bytes;
3659 /* The ...symbol_deleted_p function will skip over relocs but it
3660 won't adjust their offsets, so do that here. */
3661 while (cookie->rel < cookie->relend
3662 && cookie->rel->r_offset < offset)
3664 cookie->rel->r_offset -= removed_bytes;
3668 while (cookie->rel < cookie->relend
3669 && cookie->rel->r_offset == offset)
3671 if (bfd_elf_reloc_symbol_deleted_p (offset, cookie))
3673 /* Remove the table entry. (If the reloc type is NONE, then
3674 the entry has already been merged with another and deleted
3675 during relaxation.) */
3676 if (ELF32_R_TYPE (cookie->rel->r_info) != R_XTENSA_NONE)
3678 /* Shift the contents up. */
3679 if (offset + entry_size < sec->size)
3680 memmove (&contents[actual_offset],
3681 &contents[actual_offset + entry_size],
3682 sec->size - offset - entry_size);
3683 removed_bytes += entry_size;
3686 /* Remove this relocation. */
3687 cookie->rel->r_info = ELF32_R_INFO (0, R_XTENSA_NONE);
3690 /* Adjust the relocation offset for previous removals. This
3691 should not be done before calling ...symbol_deleted_p
3692 because it might mess up the offset comparisons there.
3693 Make sure the offset doesn't underflow in the case where
3694 the first entry is removed. */
3695 if (cookie->rel->r_offset >= removed_bytes)
3696 cookie->rel->r_offset -= removed_bytes;
3698 cookie->rel->r_offset = 0;
3704 if (removed_bytes != 0)
3706 /* Adjust any remaining relocs (shouldn't be any). */
3707 for (; cookie->rel < cookie->relend; cookie->rel++)
3709 if (cookie->rel->r_offset >= removed_bytes)
3710 cookie->rel->r_offset -= removed_bytes;
3712 cookie->rel->r_offset = 0;
3715 /* Clear the removed bytes. */
3716 memset (&contents[sec->size - removed_bytes], 0, removed_bytes);
3718 pin_contents (sec, contents);
3719 pin_internal_relocs (sec, cookie->rels);
3722 if (sec->rawsize == 0)
3723 sec->rawsize = sec->size;
3724 sec->size -= removed_bytes;
3726 if (xtensa_is_littable_section (sec))
3728 asection *sgotloc = elf_xtensa_hash_table (info)->sgotloc;
3730 sgotloc->size -= removed_bytes;
3735 release_contents (sec, contents);
3736 release_internal_relocs (sec, cookie->rels);
3739 return (removed_bytes != 0);
3744 elf_xtensa_discard_info (bfd *abfd,
3745 struct elf_reloc_cookie *cookie,
3746 struct bfd_link_info *info)
3749 bfd_boolean changed = FALSE;
3751 for (sec = abfd->sections; sec != NULL; sec = sec->next)
3753 if (xtensa_is_property_section (sec))
3755 if (elf_xtensa_discard_info_for_section (abfd, cookie, info, sec))
3765 elf_xtensa_ignore_discarded_relocs (asection *sec)
3767 return xtensa_is_property_section (sec);
3772 elf_xtensa_action_discarded (asection *sec)
3774 if (strcmp (".xt_except_table", sec->name) == 0)
3777 if (strcmp (".xt_except_desc", sec->name) == 0)
3780 return _bfd_elf_default_action_discarded (sec);
3784 /* Support for core dump NOTE sections. */
3787 elf_xtensa_grok_prstatus (bfd *abfd, Elf_Internal_Note *note)
3792 /* The size for Xtensa is variable, so don't try to recognize the format
3793 based on the size. Just assume this is GNU/Linux. */
3796 elf_tdata (abfd)->core->signal = bfd_get_16 (abfd, note->descdata + 12);
3799 elf_tdata (abfd)->core->lwpid = bfd_get_32 (abfd, note->descdata + 24);
3803 size = note->descsz - offset - 4;
3805 /* Make a ".reg/999" section. */
3806 return _bfd_elfcore_make_pseudosection (abfd, ".reg",
3807 size, note->descpos + offset);
3812 elf_xtensa_grok_psinfo (bfd *abfd, Elf_Internal_Note *note)
3814 switch (note->descsz)
3819 case 128: /* GNU/Linux elf_prpsinfo */
3820 elf_tdata (abfd)->core->program
3821 = _bfd_elfcore_strndup (abfd, note->descdata + 32, 16);
3822 elf_tdata (abfd)->core->command
3823 = _bfd_elfcore_strndup (abfd, note->descdata + 48, 80);
3826 /* Note that for some reason, a spurious space is tacked
3827 onto the end of the args in some (at least one anyway)
3828 implementations, so strip it off if it exists. */
3831 char *command = elf_tdata (abfd)->core->command;
3832 int n = strlen (command);
3834 if (0 < n && command[n - 1] == ' ')
3835 command[n - 1] = '\0';
3842 /* Generic Xtensa configurability stuff. */
3844 static xtensa_opcode callx0_op = XTENSA_UNDEFINED;
3845 static xtensa_opcode callx4_op = XTENSA_UNDEFINED;
3846 static xtensa_opcode callx8_op = XTENSA_UNDEFINED;
3847 static xtensa_opcode callx12_op = XTENSA_UNDEFINED;
3848 static xtensa_opcode call0_op = XTENSA_UNDEFINED;
3849 static xtensa_opcode call4_op = XTENSA_UNDEFINED;
3850 static xtensa_opcode call8_op = XTENSA_UNDEFINED;
3851 static xtensa_opcode call12_op = XTENSA_UNDEFINED;
3854 init_call_opcodes (void)
3856 if (callx0_op == XTENSA_UNDEFINED)
3858 callx0_op = xtensa_opcode_lookup (xtensa_default_isa, "callx0");
3859 callx4_op = xtensa_opcode_lookup (xtensa_default_isa, "callx4");
3860 callx8_op = xtensa_opcode_lookup (xtensa_default_isa, "callx8");
3861 callx12_op = xtensa_opcode_lookup (xtensa_default_isa, "callx12");
3862 call0_op = xtensa_opcode_lookup (xtensa_default_isa, "call0");
3863 call4_op = xtensa_opcode_lookup (xtensa_default_isa, "call4");
3864 call8_op = xtensa_opcode_lookup (xtensa_default_isa, "call8");
3865 call12_op = xtensa_opcode_lookup (xtensa_default_isa, "call12");
3871 is_indirect_call_opcode (xtensa_opcode opcode)
3873 init_call_opcodes ();
3874 return (opcode == callx0_op
3875 || opcode == callx4_op
3876 || opcode == callx8_op
3877 || opcode == callx12_op);
3882 is_direct_call_opcode (xtensa_opcode opcode)
3884 init_call_opcodes ();
3885 return (opcode == call0_op
3886 || opcode == call4_op
3887 || opcode == call8_op
3888 || opcode == call12_op);
3893 is_windowed_call_opcode (xtensa_opcode opcode)
3895 init_call_opcodes ();
3896 return (opcode == call4_op
3897 || opcode == call8_op
3898 || opcode == call12_op
3899 || opcode == callx4_op
3900 || opcode == callx8_op
3901 || opcode == callx12_op);
3906 get_indirect_call_dest_reg (xtensa_opcode opcode, unsigned *pdst)
3908 unsigned dst = (unsigned) -1;
3910 init_call_opcodes ();
3911 if (opcode == callx0_op)
3913 else if (opcode == callx4_op)
3915 else if (opcode == callx8_op)
3917 else if (opcode == callx12_op)
3920 if (dst == (unsigned) -1)
3928 static xtensa_opcode
3929 get_const16_opcode (void)
3931 static bfd_boolean done_lookup = FALSE;
3932 static xtensa_opcode const16_opcode = XTENSA_UNDEFINED;
3935 const16_opcode = xtensa_opcode_lookup (xtensa_default_isa, "const16");
3938 return const16_opcode;
3942 static xtensa_opcode
3943 get_l32r_opcode (void)
3945 static xtensa_opcode l32r_opcode = XTENSA_UNDEFINED;
3946 static bfd_boolean done_lookup = FALSE;
3950 l32r_opcode = xtensa_opcode_lookup (xtensa_default_isa, "l32r");
3958 l32r_offset (bfd_vma addr, bfd_vma pc)
3962 offset = addr - ((pc+3) & -4);
3963 BFD_ASSERT ((offset & ((1 << 2) - 1)) == 0);
3964 offset = (signed int) offset >> 2;
3965 BFD_ASSERT ((signed int) offset >> 16 == -1);
3971 get_relocation_opnd (xtensa_opcode opcode, int r_type)
3973 xtensa_isa isa = xtensa_default_isa;
3974 int last_immed, last_opnd, opi;
3976 if (opcode == XTENSA_UNDEFINED)
3977 return XTENSA_UNDEFINED;
3979 /* Find the last visible PC-relative immediate operand for the opcode.
3980 If there are no PC-relative immediates, then choose the last visible
3981 immediate; otherwise, fail and return XTENSA_UNDEFINED. */
3982 last_immed = XTENSA_UNDEFINED;
3983 last_opnd = xtensa_opcode_num_operands (isa, opcode);
3984 for (opi = last_opnd - 1; opi >= 0; opi--)
3986 if (xtensa_operand_is_visible (isa, opcode, opi) == 0)
3988 if (xtensa_operand_is_PCrelative (isa, opcode, opi) == 1)
3993 if (last_immed == XTENSA_UNDEFINED
3994 && xtensa_operand_is_register (isa, opcode, opi) == 0)
3998 return XTENSA_UNDEFINED;
4000 /* If the operand number was specified in an old-style relocation,
4001 check for consistency with the operand computed above. */
4002 if (r_type >= R_XTENSA_OP0 && r_type <= R_XTENSA_OP2)
4004 int reloc_opnd = r_type - R_XTENSA_OP0;
4005 if (reloc_opnd != last_immed)
4006 return XTENSA_UNDEFINED;
4014 get_relocation_slot (int r_type)
4024 if (r_type >= R_XTENSA_SLOT0_OP && r_type <= R_XTENSA_SLOT14_OP)
4025 return r_type - R_XTENSA_SLOT0_OP;
4026 if (r_type >= R_XTENSA_SLOT0_ALT && r_type <= R_XTENSA_SLOT14_ALT)
4027 return r_type - R_XTENSA_SLOT0_ALT;
4031 return XTENSA_UNDEFINED;
4035 /* Get the opcode for a relocation. */
4037 static xtensa_opcode
4038 get_relocation_opcode (bfd *abfd,
4041 Elf_Internal_Rela *irel)
4043 static xtensa_insnbuf ibuff = NULL;
4044 static xtensa_insnbuf sbuff = NULL;
4045 xtensa_isa isa = xtensa_default_isa;
4049 if (contents == NULL)
4050 return XTENSA_UNDEFINED;
4052 if (bfd_get_section_limit (abfd, sec) <= irel->r_offset)
4053 return XTENSA_UNDEFINED;
4057 ibuff = xtensa_insnbuf_alloc (isa);
4058 sbuff = xtensa_insnbuf_alloc (isa);
4061 /* Decode the instruction. */
4062 xtensa_insnbuf_from_chars (isa, ibuff, &contents[irel->r_offset],
4063 sec->size - irel->r_offset);
4064 fmt = xtensa_format_decode (isa, ibuff);
4065 slot = get_relocation_slot (ELF32_R_TYPE (irel->r_info));
4066 if (slot == XTENSA_UNDEFINED)
4067 return XTENSA_UNDEFINED;
4068 xtensa_format_get_slot (isa, fmt, slot, ibuff, sbuff);
4069 return xtensa_opcode_decode (isa, fmt, slot, sbuff);
4074 is_l32r_relocation (bfd *abfd,
4077 Elf_Internal_Rela *irel)
4079 xtensa_opcode opcode;
4080 if (!is_operand_relocation (ELF32_R_TYPE (irel->r_info)))
4082 opcode = get_relocation_opcode (abfd, sec, contents, irel);
4083 return (opcode == get_l32r_opcode ());
4087 static bfd_size_type
4088 get_asm_simplify_size (bfd_byte *contents,
4089 bfd_size_type content_len,
4090 bfd_size_type offset)
4092 bfd_size_type insnlen, size = 0;
4094 /* Decode the size of the next two instructions. */
4095 insnlen = insn_decode_len (contents, content_len, offset);
4101 insnlen = insn_decode_len (contents, content_len, offset + size);
4111 is_alt_relocation (int r_type)
4113 return (r_type >= R_XTENSA_SLOT0_ALT
4114 && r_type <= R_XTENSA_SLOT14_ALT);
4119 is_operand_relocation (int r_type)
4129 if (r_type >= R_XTENSA_SLOT0_OP && r_type <= R_XTENSA_SLOT14_OP)
4131 if (r_type >= R_XTENSA_SLOT0_ALT && r_type <= R_XTENSA_SLOT14_ALT)
4140 #define MIN_INSN_LENGTH 2
4142 /* Return 0 if it fails to decode. */
4145 insn_decode_len (bfd_byte *contents,
4146 bfd_size_type content_len,
4147 bfd_size_type offset)
4150 xtensa_isa isa = xtensa_default_isa;
4152 static xtensa_insnbuf ibuff = NULL;
4154 if (offset + MIN_INSN_LENGTH > content_len)
4158 ibuff = xtensa_insnbuf_alloc (isa);
4159 xtensa_insnbuf_from_chars (isa, ibuff, &contents[offset],
4160 content_len - offset);
4161 fmt = xtensa_format_decode (isa, ibuff);
4162 if (fmt == XTENSA_UNDEFINED)
4164 insn_len = xtensa_format_length (isa, fmt);
4165 if (insn_len == XTENSA_UNDEFINED)
4171 /* Decode the opcode for a single slot instruction.
4172 Return 0 if it fails to decode or the instruction is multi-slot. */
4175 insn_decode_opcode (bfd_byte *contents,
4176 bfd_size_type content_len,
4177 bfd_size_type offset,
4180 xtensa_isa isa = xtensa_default_isa;
4182 static xtensa_insnbuf insnbuf = NULL;
4183 static xtensa_insnbuf slotbuf = NULL;
4185 if (offset + MIN_INSN_LENGTH > content_len)
4186 return XTENSA_UNDEFINED;
4188 if (insnbuf == NULL)
4190 insnbuf = xtensa_insnbuf_alloc (isa);
4191 slotbuf = xtensa_insnbuf_alloc (isa);
4194 xtensa_insnbuf_from_chars (isa, insnbuf, &contents[offset],
4195 content_len - offset);
4196 fmt = xtensa_format_decode (isa, insnbuf);
4197 if (fmt == XTENSA_UNDEFINED)
4198 return XTENSA_UNDEFINED;
4200 if (slot >= xtensa_format_num_slots (isa, fmt))
4201 return XTENSA_UNDEFINED;
4203 xtensa_format_get_slot (isa, fmt, slot, insnbuf, slotbuf);
4204 return xtensa_opcode_decode (isa, fmt, slot, slotbuf);
4208 /* The offset is the offset in the contents.
4209 The address is the address of that offset. */
4212 check_branch_target_aligned (bfd_byte *contents,
4213 bfd_size_type content_length,
4217 bfd_size_type insn_len = insn_decode_len (contents, content_length, offset);
4220 return check_branch_target_aligned_address (address, insn_len);
4225 check_loop_aligned (bfd_byte *contents,
4226 bfd_size_type content_length,
4230 bfd_size_type loop_len, insn_len;
4231 xtensa_opcode opcode;
4233 opcode = insn_decode_opcode (contents, content_length, offset, 0);
4234 if (opcode == XTENSA_UNDEFINED
4235 || xtensa_opcode_is_loop (xtensa_default_isa, opcode) != 1)
4241 loop_len = insn_decode_len (contents, content_length, offset);
4242 insn_len = insn_decode_len (contents, content_length, offset + loop_len);
4243 if (loop_len == 0 || insn_len == 0)
4249 return check_branch_target_aligned_address (address + loop_len, insn_len);
4254 check_branch_target_aligned_address (bfd_vma addr, int len)
4257 return (addr % 8 == 0);
4258 return ((addr >> 2) == ((addr + len - 1) >> 2));
4262 /* Instruction widening and narrowing. */
4264 /* When FLIX is available we need to access certain instructions only
4265 when they are 16-bit or 24-bit instructions. This table caches
4266 information about such instructions by walking through all the
4267 opcodes and finding the smallest single-slot format into which each
4270 static xtensa_format *op_single_fmt_table = NULL;
4274 init_op_single_format_table (void)
4276 xtensa_isa isa = xtensa_default_isa;
4277 xtensa_insnbuf ibuf;
4278 xtensa_opcode opcode;
4282 if (op_single_fmt_table)
4285 ibuf = xtensa_insnbuf_alloc (isa);
4286 num_opcodes = xtensa_isa_num_opcodes (isa);
4288 op_single_fmt_table = (xtensa_format *)
4289 bfd_malloc (sizeof (xtensa_format) * num_opcodes);
4290 for (opcode = 0; opcode < num_opcodes; opcode++)
4292 op_single_fmt_table[opcode] = XTENSA_UNDEFINED;
4293 for (fmt = 0; fmt < xtensa_isa_num_formats (isa); fmt++)
4295 if (xtensa_format_num_slots (isa, fmt) == 1
4296 && xtensa_opcode_encode (isa, fmt, 0, ibuf, opcode) == 0)
4298 xtensa_opcode old_fmt = op_single_fmt_table[opcode];
4299 int fmt_length = xtensa_format_length (isa, fmt);
4300 if (old_fmt == XTENSA_UNDEFINED
4301 || fmt_length < xtensa_format_length (isa, old_fmt))
4302 op_single_fmt_table[opcode] = fmt;
4306 xtensa_insnbuf_free (isa, ibuf);
4310 static xtensa_format
4311 get_single_format (xtensa_opcode opcode)
4313 init_op_single_format_table ();
4314 return op_single_fmt_table[opcode];
4318 /* For the set of narrowable instructions we do NOT include the
4319 narrowings beqz -> beqz.n or bnez -> bnez.n because of complexities
4320 involved during linker relaxation that may require these to
4321 re-expand in some conditions. Also, the narrowing "or" -> mov.n
4322 requires special case code to ensure it only works when op1 == op2. */
4330 struct string_pair narrowable[] =
4333 { "addi", "addi.n" },
4334 { "addmi", "addi.n" },
4335 { "l32i", "l32i.n" },
4336 { "movi", "movi.n" },
4338 { "retw", "retw.n" },
4339 { "s32i", "s32i.n" },
4340 { "or", "mov.n" } /* special case only when op1 == op2 */
4343 struct string_pair widenable[] =
4346 { "addi", "addi.n" },
4347 { "addmi", "addi.n" },
4348 { "beqz", "beqz.n" },
4349 { "bnez", "bnez.n" },
4350 { "l32i", "l32i.n" },
4351 { "movi", "movi.n" },
4353 { "retw", "retw.n" },
4354 { "s32i", "s32i.n" },
4355 { "or", "mov.n" } /* special case only when op1 == op2 */
4359 /* Check if an instruction can be "narrowed", i.e., changed from a standard
4360 3-byte instruction to a 2-byte "density" instruction. If it is valid,
4361 return the instruction buffer holding the narrow instruction. Otherwise,
4362 return 0. The set of valid narrowing are specified by a string table
4363 but require some special case operand checks in some cases. */
4365 static xtensa_insnbuf
4366 can_narrow_instruction (xtensa_insnbuf slotbuf,
4368 xtensa_opcode opcode)
4370 xtensa_isa isa = xtensa_default_isa;
4371 xtensa_format o_fmt;
4374 static xtensa_insnbuf o_insnbuf = NULL;
4375 static xtensa_insnbuf o_slotbuf = NULL;
4377 if (o_insnbuf == NULL)
4379 o_insnbuf = xtensa_insnbuf_alloc (isa);
4380 o_slotbuf = xtensa_insnbuf_alloc (isa);
4383 for (opi = 0; opi < (sizeof (narrowable)/sizeof (struct string_pair)); opi++)
4385 bfd_boolean is_or = (strcmp ("or", narrowable[opi].wide) == 0);
4387 if (opcode == xtensa_opcode_lookup (isa, narrowable[opi].wide))
4389 uint32 value, newval;
4390 int i, operand_count, o_operand_count;
4391 xtensa_opcode o_opcode;
4393 /* Address does not matter in this case. We might need to
4394 fix it to handle branches/jumps. */
4395 bfd_vma self_address = 0;
4397 o_opcode = xtensa_opcode_lookup (isa, narrowable[opi].narrow);
4398 if (o_opcode == XTENSA_UNDEFINED)
4400 o_fmt = get_single_format (o_opcode);
4401 if (o_fmt == XTENSA_UNDEFINED)
4404 if (xtensa_format_length (isa, fmt) != 3
4405 || xtensa_format_length (isa, o_fmt) != 2)
4408 xtensa_format_encode (isa, o_fmt, o_insnbuf);
4409 operand_count = xtensa_opcode_num_operands (isa, opcode);
4410 o_operand_count = xtensa_opcode_num_operands (isa, o_opcode);
4412 if (xtensa_opcode_encode (isa, o_fmt, 0, o_slotbuf, o_opcode) != 0)
4417 if (xtensa_opcode_num_operands (isa, o_opcode) != operand_count)
4422 uint32 rawval0, rawval1, rawval2;
4424 if (o_operand_count + 1 != operand_count
4425 || xtensa_operand_get_field (isa, opcode, 0,
4426 fmt, 0, slotbuf, &rawval0) != 0
4427 || xtensa_operand_get_field (isa, opcode, 1,
4428 fmt, 0, slotbuf, &rawval1) != 0
4429 || xtensa_operand_get_field (isa, opcode, 2,
4430 fmt, 0, slotbuf, &rawval2) != 0
4431 || rawval1 != rawval2
4432 || rawval0 == rawval1 /* it is a nop */)
4436 for (i = 0; i < o_operand_count; ++i)
4438 if (xtensa_operand_get_field (isa, opcode, i, fmt, 0,
4440 || xtensa_operand_decode (isa, opcode, i, &value))
4443 /* PC-relative branches need adjustment, but
4444 the PC-rel operand will always have a relocation. */
4446 if (xtensa_operand_do_reloc (isa, o_opcode, i, &newval,
4448 || xtensa_operand_encode (isa, o_opcode, i, &newval)
4449 || xtensa_operand_set_field (isa, o_opcode, i, o_fmt, 0,
4454 if (xtensa_format_set_slot (isa, o_fmt, 0, o_insnbuf, o_slotbuf))
4464 /* Attempt to narrow an instruction. If the narrowing is valid, perform
4465 the action in-place directly into the contents and return TRUE. Otherwise,
4466 the return value is FALSE and the contents are not modified. */
4469 narrow_instruction (bfd_byte *contents,
4470 bfd_size_type content_length,
4471 bfd_size_type offset)
4473 xtensa_opcode opcode;
4474 bfd_size_type insn_len;
4475 xtensa_isa isa = xtensa_default_isa;
4477 xtensa_insnbuf o_insnbuf;
4479 static xtensa_insnbuf insnbuf = NULL;
4480 static xtensa_insnbuf slotbuf = NULL;
4482 if (insnbuf == NULL)
4484 insnbuf = xtensa_insnbuf_alloc (isa);
4485 slotbuf = xtensa_insnbuf_alloc (isa);
4488 BFD_ASSERT (offset < content_length);
4490 if (content_length < 2)
4493 /* We will hand-code a few of these for a little while.
4494 These have all been specified in the assembler aleady. */
4495 xtensa_insnbuf_from_chars (isa, insnbuf, &contents[offset],
4496 content_length - offset);
4497 fmt = xtensa_format_decode (isa, insnbuf);
4498 if (xtensa_format_num_slots (isa, fmt) != 1)
4501 if (xtensa_format_get_slot (isa, fmt, 0, insnbuf, slotbuf) != 0)
4504 opcode = xtensa_opcode_decode (isa, fmt, 0, slotbuf);
4505 if (opcode == XTENSA_UNDEFINED)
4507 insn_len = xtensa_format_length (isa, fmt);
4508 if (insn_len > content_length)
4511 o_insnbuf = can_narrow_instruction (slotbuf, fmt, opcode);
4514 xtensa_insnbuf_to_chars (isa, o_insnbuf, contents + offset,
4515 content_length - offset);
4523 /* Check if an instruction can be "widened", i.e., changed from a 2-byte
4524 "density" instruction to a standard 3-byte instruction. If it is valid,
4525 return the instruction buffer holding the wide instruction. Otherwise,
4526 return 0. The set of valid widenings are specified by a string table
4527 but require some special case operand checks in some cases. */
4529 static xtensa_insnbuf
4530 can_widen_instruction (xtensa_insnbuf slotbuf,
4532 xtensa_opcode opcode)
4534 xtensa_isa isa = xtensa_default_isa;
4535 xtensa_format o_fmt;
4538 static xtensa_insnbuf o_insnbuf = NULL;
4539 static xtensa_insnbuf o_slotbuf = NULL;
4541 if (o_insnbuf == NULL)
4543 o_insnbuf = xtensa_insnbuf_alloc (isa);
4544 o_slotbuf = xtensa_insnbuf_alloc (isa);
4547 for (opi = 0; opi < (sizeof (widenable)/sizeof (struct string_pair)); opi++)
4549 bfd_boolean is_or = (strcmp ("or", widenable[opi].wide) == 0);
4550 bfd_boolean is_branch = (strcmp ("beqz", widenable[opi].wide) == 0
4551 || strcmp ("bnez", widenable[opi].wide) == 0);
4553 if (opcode == xtensa_opcode_lookup (isa, widenable[opi].narrow))
4555 uint32 value, newval;
4556 int i, operand_count, o_operand_count, check_operand_count;
4557 xtensa_opcode o_opcode;
4559 /* Address does not matter in this case. We might need to fix it
4560 to handle branches/jumps. */
4561 bfd_vma self_address = 0;
4563 o_opcode = xtensa_opcode_lookup (isa, widenable[opi].wide);
4564 if (o_opcode == XTENSA_UNDEFINED)
4566 o_fmt = get_single_format (o_opcode);
4567 if (o_fmt == XTENSA_UNDEFINED)
4570 if (xtensa_format_length (isa, fmt) != 2
4571 || xtensa_format_length (isa, o_fmt) != 3)
4574 xtensa_format_encode (isa, o_fmt, o_insnbuf);
4575 operand_count = xtensa_opcode_num_operands (isa, opcode);
4576 o_operand_count = xtensa_opcode_num_operands (isa, o_opcode);
4577 check_operand_count = o_operand_count;
4579 if (xtensa_opcode_encode (isa, o_fmt, 0, o_slotbuf, o_opcode) != 0)
4584 if (xtensa_opcode_num_operands (isa, o_opcode) != operand_count)
4589 uint32 rawval0, rawval1;
4591 if (o_operand_count != operand_count + 1
4592 || xtensa_operand_get_field (isa, opcode, 0,
4593 fmt, 0, slotbuf, &rawval0) != 0
4594 || xtensa_operand_get_field (isa, opcode, 1,
4595 fmt, 0, slotbuf, &rawval1) != 0
4596 || rawval0 == rawval1 /* it is a nop */)
4600 check_operand_count--;
4602 for (i = 0; i < check_operand_count; i++)
4605 if (is_or && i == o_operand_count - 1)
4607 if (xtensa_operand_get_field (isa, opcode, new_i, fmt, 0,
4609 || xtensa_operand_decode (isa, opcode, new_i, &value))
4612 /* PC-relative branches need adjustment, but
4613 the PC-rel operand will always have a relocation. */
4615 if (xtensa_operand_do_reloc (isa, o_opcode, i, &newval,
4617 || xtensa_operand_encode (isa, o_opcode, i, &newval)
4618 || xtensa_operand_set_field (isa, o_opcode, i, o_fmt, 0,
4623 if (xtensa_format_set_slot (isa, o_fmt, 0, o_insnbuf, o_slotbuf))
4633 /* Attempt to widen an instruction. If the widening is valid, perform
4634 the action in-place directly into the contents and return TRUE. Otherwise,
4635 the return value is FALSE and the contents are not modified. */
4638 widen_instruction (bfd_byte *contents,
4639 bfd_size_type content_length,
4640 bfd_size_type offset)
4642 xtensa_opcode opcode;
4643 bfd_size_type insn_len;
4644 xtensa_isa isa = xtensa_default_isa;
4646 xtensa_insnbuf o_insnbuf;
4648 static xtensa_insnbuf insnbuf = NULL;
4649 static xtensa_insnbuf slotbuf = NULL;
4651 if (insnbuf == NULL)
4653 insnbuf = xtensa_insnbuf_alloc (isa);
4654 slotbuf = xtensa_insnbuf_alloc (isa);
4657 BFD_ASSERT (offset < content_length);
4659 if (content_length < 2)
4662 /* We will hand-code a few of these for a little while.
4663 These have all been specified in the assembler aleady. */
4664 xtensa_insnbuf_from_chars (isa, insnbuf, &contents[offset],
4665 content_length - offset);
4666 fmt = xtensa_format_decode (isa, insnbuf);
4667 if (xtensa_format_num_slots (isa, fmt) != 1)
4670 if (xtensa_format_get_slot (isa, fmt, 0, insnbuf, slotbuf) != 0)
4673 opcode = xtensa_opcode_decode (isa, fmt, 0, slotbuf);
4674 if (opcode == XTENSA_UNDEFINED)
4676 insn_len = xtensa_format_length (isa, fmt);
4677 if (insn_len > content_length)
4680 o_insnbuf = can_widen_instruction (slotbuf, fmt, opcode);
4683 xtensa_insnbuf_to_chars (isa, o_insnbuf, contents + offset,
4684 content_length - offset);
4691 /* Code for transforming CALLs at link-time. */
4693 static bfd_reloc_status_type
4694 elf_xtensa_do_asm_simplify (bfd_byte *contents,
4696 bfd_vma content_length,
4697 char **error_message)
4699 static xtensa_insnbuf insnbuf = NULL;
4700 static xtensa_insnbuf slotbuf = NULL;
4701 xtensa_format core_format = XTENSA_UNDEFINED;
4702 xtensa_opcode opcode;
4703 xtensa_opcode direct_call_opcode;
4704 xtensa_isa isa = xtensa_default_isa;
4705 bfd_byte *chbuf = contents + address;
4708 if (insnbuf == NULL)
4710 insnbuf = xtensa_insnbuf_alloc (isa);
4711 slotbuf = xtensa_insnbuf_alloc (isa);
4714 if (content_length < address)
4716 *error_message = _("Attempt to convert L32R/CALLX to CALL failed");
4717 return bfd_reloc_other;
4720 opcode = get_expanded_call_opcode (chbuf, content_length - address, 0);
4721 direct_call_opcode = swap_callx_for_call_opcode (opcode);
4722 if (direct_call_opcode == XTENSA_UNDEFINED)
4724 *error_message = _("Attempt to convert L32R/CALLX to CALL failed");
4725 return bfd_reloc_other;
4728 /* Assemble a NOP ("or a1, a1, a1") into the 0 byte offset. */
4729 core_format = xtensa_format_lookup (isa, "x24");
4730 opcode = xtensa_opcode_lookup (isa, "or");
4731 xtensa_opcode_encode (isa, core_format, 0, slotbuf, opcode);
4732 for (opn = 0; opn < 3; opn++)
4735 xtensa_operand_encode (isa, opcode, opn, ®no);
4736 xtensa_operand_set_field (isa, opcode, opn, core_format, 0,
4739 xtensa_format_encode (isa, core_format, insnbuf);
4740 xtensa_format_set_slot (isa, core_format, 0, insnbuf, slotbuf);
4741 xtensa_insnbuf_to_chars (isa, insnbuf, chbuf, content_length - address);
4743 /* Assemble a CALL ("callN 0") into the 3 byte offset. */
4744 xtensa_opcode_encode (isa, core_format, 0, slotbuf, direct_call_opcode);
4745 xtensa_operand_set_field (isa, opcode, 0, core_format, 0, slotbuf, 0);
4747 xtensa_format_encode (isa, core_format, insnbuf);
4748 xtensa_format_set_slot (isa, core_format, 0, insnbuf, slotbuf);
4749 xtensa_insnbuf_to_chars (isa, insnbuf, chbuf + 3,
4750 content_length - address - 3);
4752 return bfd_reloc_ok;
4756 static bfd_reloc_status_type
4757 contract_asm_expansion (bfd_byte *contents,
4758 bfd_vma content_length,
4759 Elf_Internal_Rela *irel,
4760 char **error_message)
4762 bfd_reloc_status_type retval =
4763 elf_xtensa_do_asm_simplify (contents, irel->r_offset, content_length,
4766 if (retval != bfd_reloc_ok)
4767 return bfd_reloc_dangerous;
4769 /* Update the irel->r_offset field so that the right immediate and
4770 the right instruction are modified during the relocation. */
4771 irel->r_offset += 3;
4772 irel->r_info = ELF32_R_INFO (ELF32_R_SYM (irel->r_info), R_XTENSA_SLOT0_OP);
4773 return bfd_reloc_ok;
4777 static xtensa_opcode
4778 swap_callx_for_call_opcode (xtensa_opcode opcode)
4780 init_call_opcodes ();
4782 if (opcode == callx0_op) return call0_op;
4783 if (opcode == callx4_op) return call4_op;
4784 if (opcode == callx8_op) return call8_op;
4785 if (opcode == callx12_op) return call12_op;
4787 /* Return XTENSA_UNDEFINED if the opcode is not an indirect call. */
4788 return XTENSA_UNDEFINED;
4792 /* Check if "buf" is pointing to a "L32R aN; CALLX aN" or "CONST16 aN;
4793 CONST16 aN; CALLX aN" sequence, and if so, return the CALLX opcode.
4794 If not, return XTENSA_UNDEFINED. */
4796 #define L32R_TARGET_REG_OPERAND 0
4797 #define CONST16_TARGET_REG_OPERAND 0
4798 #define CALLN_SOURCE_OPERAND 0
4800 static xtensa_opcode
4801 get_expanded_call_opcode (bfd_byte *buf, int bufsize, bfd_boolean *p_uses_l32r)
4803 static xtensa_insnbuf insnbuf = NULL;
4804 static xtensa_insnbuf slotbuf = NULL;
4806 xtensa_opcode opcode;
4807 xtensa_isa isa = xtensa_default_isa;
4808 uint32 regno, const16_regno, call_regno;
4811 if (insnbuf == NULL)
4813 insnbuf = xtensa_insnbuf_alloc (isa);
4814 slotbuf = xtensa_insnbuf_alloc (isa);
4817 xtensa_insnbuf_from_chars (isa, insnbuf, buf, bufsize);
4818 fmt = xtensa_format_decode (isa, insnbuf);
4819 if (fmt == XTENSA_UNDEFINED
4820 || xtensa_format_get_slot (isa, fmt, 0, insnbuf, slotbuf))
4821 return XTENSA_UNDEFINED;
4823 opcode = xtensa_opcode_decode (isa, fmt, 0, slotbuf);
4824 if (opcode == XTENSA_UNDEFINED)
4825 return XTENSA_UNDEFINED;
4827 if (opcode == get_l32r_opcode ())
4830 *p_uses_l32r = TRUE;
4831 if (xtensa_operand_get_field (isa, opcode, L32R_TARGET_REG_OPERAND,
4832 fmt, 0, slotbuf, ®no)
4833 || xtensa_operand_decode (isa, opcode, L32R_TARGET_REG_OPERAND,
4835 return XTENSA_UNDEFINED;
4837 else if (opcode == get_const16_opcode ())
4840 *p_uses_l32r = FALSE;
4841 if (xtensa_operand_get_field (isa, opcode, CONST16_TARGET_REG_OPERAND,
4842 fmt, 0, slotbuf, ®no)
4843 || xtensa_operand_decode (isa, opcode, CONST16_TARGET_REG_OPERAND,
4845 return XTENSA_UNDEFINED;
4847 /* Check that the next instruction is also CONST16. */
4848 offset += xtensa_format_length (isa, fmt);
4849 xtensa_insnbuf_from_chars (isa, insnbuf, buf + offset, bufsize - offset);
4850 fmt = xtensa_format_decode (isa, insnbuf);
4851 if (fmt == XTENSA_UNDEFINED
4852 || xtensa_format_get_slot (isa, fmt, 0, insnbuf, slotbuf))
4853 return XTENSA_UNDEFINED;
4854 opcode = xtensa_opcode_decode (isa, fmt, 0, slotbuf);
4855 if (opcode != get_const16_opcode ())
4856 return XTENSA_UNDEFINED;
4858 if (xtensa_operand_get_field (isa, opcode, CONST16_TARGET_REG_OPERAND,
4859 fmt, 0, slotbuf, &const16_regno)
4860 || xtensa_operand_decode (isa, opcode, CONST16_TARGET_REG_OPERAND,
4862 || const16_regno != regno)
4863 return XTENSA_UNDEFINED;
4866 return XTENSA_UNDEFINED;
4868 /* Next instruction should be an CALLXn with operand 0 == regno. */
4869 offset += xtensa_format_length (isa, fmt);
4870 xtensa_insnbuf_from_chars (isa, insnbuf, buf + offset, bufsize - offset);
4871 fmt = xtensa_format_decode (isa, insnbuf);
4872 if (fmt == XTENSA_UNDEFINED
4873 || xtensa_format_get_slot (isa, fmt, 0, insnbuf, slotbuf))
4874 return XTENSA_UNDEFINED;
4875 opcode = xtensa_opcode_decode (isa, fmt, 0, slotbuf);
4876 if (opcode == XTENSA_UNDEFINED
4877 || !is_indirect_call_opcode (opcode))
4878 return XTENSA_UNDEFINED;
4880 if (xtensa_operand_get_field (isa, opcode, CALLN_SOURCE_OPERAND,
4881 fmt, 0, slotbuf, &call_regno)
4882 || xtensa_operand_decode (isa, opcode, CALLN_SOURCE_OPERAND,
4884 return XTENSA_UNDEFINED;
4886 if (call_regno != regno)
4887 return XTENSA_UNDEFINED;
4893 /* Data structures used during relaxation. */
4895 /* r_reloc: relocation values. */
4897 /* Through the relaxation process, we need to keep track of the values
4898 that will result from evaluating relocations. The standard ELF
4899 relocation structure is not sufficient for this purpose because we're
4900 operating on multiple input files at once, so we need to know which
4901 input file a relocation refers to. The r_reloc structure thus
4902 records both the input file (bfd) and ELF relocation.
4904 For efficiency, an r_reloc also contains a "target_offset" field to
4905 cache the target-section-relative offset value that is represented by
4908 The r_reloc also contains a virtual offset that allows multiple
4909 inserted literals to be placed at the same "address" with
4910 different offsets. */
4912 typedef struct r_reloc_struct r_reloc;
4914 struct r_reloc_struct
4917 Elf_Internal_Rela rela;
4918 bfd_vma target_offset;
4919 bfd_vma virtual_offset;
4923 /* The r_reloc structure is included by value in literal_value, but not
4924 every literal_value has an associated relocation -- some are simple
4925 constants. In such cases, we set all the fields in the r_reloc
4926 struct to zero. The r_reloc_is_const function should be used to
4927 detect this case. */
4930 r_reloc_is_const (const r_reloc *r_rel)
4932 return (r_rel->abfd == NULL);
4937 r_reloc_get_target_offset (const r_reloc *r_rel)
4939 bfd_vma target_offset;
4940 unsigned long r_symndx;
4942 BFD_ASSERT (!r_reloc_is_const (r_rel));
4943 r_symndx = ELF32_R_SYM (r_rel->rela.r_info);
4944 target_offset = get_elf_r_symndx_offset (r_rel->abfd, r_symndx);
4945 return (target_offset + r_rel->rela.r_addend);
4949 static struct elf_link_hash_entry *
4950 r_reloc_get_hash_entry (const r_reloc *r_rel)
4952 unsigned long r_symndx = ELF32_R_SYM (r_rel->rela.r_info);
4953 return get_elf_r_symndx_hash_entry (r_rel->abfd, r_symndx);
4958 r_reloc_get_section (const r_reloc *r_rel)
4960 unsigned long r_symndx = ELF32_R_SYM (r_rel->rela.r_info);
4961 return get_elf_r_symndx_section (r_rel->abfd, r_symndx);
4966 r_reloc_is_defined (const r_reloc *r_rel)
4972 sec = r_reloc_get_section (r_rel);
4973 if (sec == bfd_abs_section_ptr
4974 || sec == bfd_com_section_ptr
4975 || sec == bfd_und_section_ptr)
4982 r_reloc_init (r_reloc *r_rel,
4984 Elf_Internal_Rela *irel,
4986 bfd_size_type content_length)
4989 reloc_howto_type *howto;
4993 r_rel->rela = *irel;
4995 r_rel->target_offset = r_reloc_get_target_offset (r_rel);
4996 r_rel->virtual_offset = 0;
4997 r_type = ELF32_R_TYPE (r_rel->rela.r_info);
4998 howto = &elf_howto_table[r_type];
4999 if (howto->partial_inplace)
5001 bfd_vma inplace_val;
5002 BFD_ASSERT (r_rel->rela.r_offset < content_length);
5004 inplace_val = bfd_get_32 (abfd, &contents[r_rel->rela.r_offset]);
5005 r_rel->target_offset += inplace_val;
5009 memset (r_rel, 0, sizeof (r_reloc));
5016 print_r_reloc (FILE *fp, const r_reloc *r_rel)
5018 if (r_reloc_is_defined (r_rel))
5020 asection *sec = r_reloc_get_section (r_rel);
5021 fprintf (fp, " %s(%s + ", sec->owner->filename, sec->name);
5023 else if (r_reloc_get_hash_entry (r_rel))
5024 fprintf (fp, " %s + ", r_reloc_get_hash_entry (r_rel)->root.root.string);
5026 fprintf (fp, " ?? + ");
5028 fprintf_vma (fp, r_rel->target_offset);
5029 if (r_rel->virtual_offset)
5031 fprintf (fp, " + ");
5032 fprintf_vma (fp, r_rel->virtual_offset);
5041 /* source_reloc: relocations that reference literals. */
5043 /* To determine whether literals can be coalesced, we need to first
5044 record all the relocations that reference the literals. The
5045 source_reloc structure below is used for this purpose. The
5046 source_reloc entries are kept in a per-literal-section array, sorted
5047 by offset within the literal section (i.e., target offset).
5049 The source_sec and r_rel.rela.r_offset fields identify the source of
5050 the relocation. The r_rel field records the relocation value, i.e.,
5051 the offset of the literal being referenced. The opnd field is needed
5052 to determine the range of the immediate field to which the relocation
5053 applies, so we can determine whether another literal with the same
5054 value is within range. The is_null field is true when the relocation
5055 is being removed (e.g., when an L32R is being removed due to a CALLX
5056 that is converted to a direct CALL). */
5058 typedef struct source_reloc_struct source_reloc;
5060 struct source_reloc_struct
5062 asection *source_sec;
5064 xtensa_opcode opcode;
5066 bfd_boolean is_null;
5067 bfd_boolean is_abs_literal;
5072 init_source_reloc (source_reloc *reloc,
5073 asection *source_sec,
5074 const r_reloc *r_rel,
5075 xtensa_opcode opcode,
5077 bfd_boolean is_abs_literal)
5079 reloc->source_sec = source_sec;
5080 reloc->r_rel = *r_rel;
5081 reloc->opcode = opcode;
5083 reloc->is_null = FALSE;
5084 reloc->is_abs_literal = is_abs_literal;
5088 /* Find the source_reloc for a particular source offset and relocation
5089 type. Note that the array is sorted by _target_ offset, so this is
5090 just a linear search. */
5092 static source_reloc *
5093 find_source_reloc (source_reloc *src_relocs,
5096 Elf_Internal_Rela *irel)
5100 for (i = 0; i < src_count; i++)
5102 if (src_relocs[i].source_sec == sec
5103 && src_relocs[i].r_rel.rela.r_offset == irel->r_offset
5104 && (ELF32_R_TYPE (src_relocs[i].r_rel.rela.r_info)
5105 == ELF32_R_TYPE (irel->r_info)))
5106 return &src_relocs[i];
5114 source_reloc_compare (const void *ap, const void *bp)
5116 const source_reloc *a = (const source_reloc *) ap;
5117 const source_reloc *b = (const source_reloc *) bp;
5119 if (a->r_rel.target_offset != b->r_rel.target_offset)
5120 return (a->r_rel.target_offset - b->r_rel.target_offset);
5122 /* We don't need to sort on these criteria for correctness,
5123 but enforcing a more strict ordering prevents unstable qsort
5124 from behaving differently with different implementations.
5125 Without the code below we get correct but different results
5126 on Solaris 2.7 and 2.8. We would like to always produce the
5127 same results no matter the host. */
5129 if ((!a->is_null) - (!b->is_null))
5130 return ((!a->is_null) - (!b->is_null));
5131 return internal_reloc_compare (&a->r_rel.rela, &b->r_rel.rela);
5135 /* Literal values and value hash tables. */
5137 /* Literals with the same value can be coalesced. The literal_value
5138 structure records the value of a literal: the "r_rel" field holds the
5139 information from the relocation on the literal (if there is one) and
5140 the "value" field holds the contents of the literal word itself.
5142 The value_map structure records a literal value along with the
5143 location of a literal holding that value. The value_map hash table
5144 is indexed by the literal value, so that we can quickly check if a
5145 particular literal value has been seen before and is thus a candidate
5148 typedef struct literal_value_struct literal_value;
5149 typedef struct value_map_struct value_map;
5150 typedef struct value_map_hash_table_struct value_map_hash_table;
5152 struct literal_value_struct
5155 unsigned long value;
5156 bfd_boolean is_abs_literal;
5159 struct value_map_struct
5161 literal_value val; /* The literal value. */
5162 r_reloc loc; /* Location of the literal. */
5166 struct value_map_hash_table_struct
5168 unsigned bucket_count;
5169 value_map **buckets;
5171 bfd_boolean has_last_loc;
5177 init_literal_value (literal_value *lit,
5178 const r_reloc *r_rel,
5179 unsigned long value,
5180 bfd_boolean is_abs_literal)
5182 lit->r_rel = *r_rel;
5184 lit->is_abs_literal = is_abs_literal;
5189 literal_value_equal (const literal_value *src1,
5190 const literal_value *src2,
5191 bfd_boolean final_static_link)
5193 struct elf_link_hash_entry *h1, *h2;
5195 if (r_reloc_is_const (&src1->r_rel) != r_reloc_is_const (&src2->r_rel))
5198 if (r_reloc_is_const (&src1->r_rel))
5199 return (src1->value == src2->value);
5201 if (ELF32_R_TYPE (src1->r_rel.rela.r_info)
5202 != ELF32_R_TYPE (src2->r_rel.rela.r_info))
5205 if (src1->r_rel.target_offset != src2->r_rel.target_offset)
5208 if (src1->r_rel.virtual_offset != src2->r_rel.virtual_offset)
5211 if (src1->value != src2->value)
5214 /* Now check for the same section (if defined) or the same elf_hash
5215 (if undefined or weak). */
5216 h1 = r_reloc_get_hash_entry (&src1->r_rel);
5217 h2 = r_reloc_get_hash_entry (&src2->r_rel);
5218 if (r_reloc_is_defined (&src1->r_rel)
5219 && (final_static_link
5220 || ((!h1 || h1->root.type != bfd_link_hash_defweak)
5221 && (!h2 || h2->root.type != bfd_link_hash_defweak))))
5223 if (r_reloc_get_section (&src1->r_rel)
5224 != r_reloc_get_section (&src2->r_rel))
5229 /* Require that the hash entries (i.e., symbols) be identical. */
5230 if (h1 != h2 || h1 == 0)
5234 if (src1->is_abs_literal != src2->is_abs_literal)
5241 /* Must be power of 2. */
5242 #define INITIAL_HASH_RELOC_BUCKET_COUNT 1024
5244 static value_map_hash_table *
5245 value_map_hash_table_init (void)
5247 value_map_hash_table *values;
5249 values = (value_map_hash_table *)
5250 bfd_zmalloc (sizeof (value_map_hash_table));
5251 values->bucket_count = INITIAL_HASH_RELOC_BUCKET_COUNT;
5253 values->buckets = (value_map **)
5254 bfd_zmalloc (sizeof (value_map *) * values->bucket_count);
5255 if (values->buckets == NULL)
5260 values->has_last_loc = FALSE;
5267 value_map_hash_table_delete (value_map_hash_table *table)
5269 free (table->buckets);
5275 hash_bfd_vma (bfd_vma val)
5277 return (val >> 2) + (val >> 10);
5282 literal_value_hash (const literal_value *src)
5286 hash_val = hash_bfd_vma (src->value);
5287 if (!r_reloc_is_const (&src->r_rel))
5291 hash_val += hash_bfd_vma (src->is_abs_literal * 1000);
5292 hash_val += hash_bfd_vma (src->r_rel.target_offset);
5293 hash_val += hash_bfd_vma (src->r_rel.virtual_offset);
5295 /* Now check for the same section and the same elf_hash. */
5296 if (r_reloc_is_defined (&src->r_rel))
5297 sec_or_hash = r_reloc_get_section (&src->r_rel);
5299 sec_or_hash = r_reloc_get_hash_entry (&src->r_rel);
5300 hash_val += hash_bfd_vma ((bfd_vma) (size_t) sec_or_hash);
5306 /* Check if the specified literal_value has been seen before. */
5309 value_map_get_cached_value (value_map_hash_table *map,
5310 const literal_value *val,
5311 bfd_boolean final_static_link)
5317 idx = literal_value_hash (val);
5318 idx = idx & (map->bucket_count - 1);
5319 bucket = map->buckets[idx];
5320 for (map_e = bucket; map_e; map_e = map_e->next)
5322 if (literal_value_equal (&map_e->val, val, final_static_link))
5329 /* Record a new literal value. It is illegal to call this if VALUE
5330 already has an entry here. */
5333 add_value_map (value_map_hash_table *map,
5334 const literal_value *val,
5336 bfd_boolean final_static_link)
5338 value_map **bucket_p;
5341 value_map *val_e = (value_map *) bfd_zmalloc (sizeof (value_map));
5344 bfd_set_error (bfd_error_no_memory);
5348 BFD_ASSERT (!value_map_get_cached_value (map, val, final_static_link));
5352 idx = literal_value_hash (val);
5353 idx = idx & (map->bucket_count - 1);
5354 bucket_p = &map->buckets[idx];
5356 val_e->next = *bucket_p;
5359 /* FIXME: Consider resizing the hash table if we get too many entries. */
5365 /* Lists of text actions (ta_) for narrowing, widening, longcall
5366 conversion, space fill, code & literal removal, etc. */
5368 /* The following text actions are generated:
5370 "ta_remove_insn" remove an instruction or instructions
5371 "ta_remove_longcall" convert longcall to call
5372 "ta_convert_longcall" convert longcall to nop/call
5373 "ta_narrow_insn" narrow a wide instruction
5374 "ta_widen" widen a narrow instruction
5375 "ta_fill" add fill or remove fill
5376 removed < 0 is a fill; branches to the fill address will be
5377 changed to address + fill size (e.g., address - removed)
5378 removed >= 0 branches to the fill address will stay unchanged
5379 "ta_remove_literal" remove a literal; this action is
5380 indicated when a literal is removed
5382 "ta_add_literal" insert a new literal; this action is
5383 indicated when a literal has been moved.
5384 It may use a virtual_offset because
5385 multiple literals can be placed at the
5388 For each of these text actions, we also record the number of bytes
5389 removed by performing the text action. In the case of a "ta_widen"
5390 or a "ta_fill" that adds space, the removed_bytes will be negative. */
5392 typedef struct text_action_struct text_action;
5393 typedef struct text_action_list_struct text_action_list;
5394 typedef enum text_action_enum_t text_action_t;
5396 enum text_action_enum_t
5399 ta_remove_insn, /* removed = -size */
5400 ta_remove_longcall, /* removed = -size */
5401 ta_convert_longcall, /* removed = 0 */
5402 ta_narrow_insn, /* removed = -1 */
5403 ta_widen_insn, /* removed = +1 */
5404 ta_fill, /* removed = +size */
5410 /* Structure for a text action record. */
5411 struct text_action_struct
5413 text_action_t action;
5414 asection *sec; /* Optional */
5416 bfd_vma virtual_offset; /* Zero except for adding literals. */
5418 literal_value value; /* Only valid when adding literals. */
5421 struct removal_by_action_entry_struct
5426 int eq_removed_before_fill;
5428 typedef struct removal_by_action_entry_struct removal_by_action_entry;
5430 struct removal_by_action_map_struct
5433 removal_by_action_entry *entry;
5435 typedef struct removal_by_action_map_struct removal_by_action_map;
5438 /* List of all of the actions taken on a text section. */
5439 struct text_action_list_struct
5443 removal_by_action_map map;
5447 static text_action *
5448 find_fill_action (text_action_list *l, asection *sec, bfd_vma offset)
5452 /* It is not necessary to fill at the end of a section. */
5453 if (sec->size == offset)
5459 splay_tree_node node = splay_tree_lookup (l->tree, (splay_tree_key)&a);
5461 return (text_action *)node->value;
5467 compute_removed_action_diff (const text_action *ta,
5471 int removable_space)
5474 int current_removed = 0;
5477 current_removed = ta->removed_bytes;
5479 BFD_ASSERT (ta == NULL || ta->offset == offset);
5480 BFD_ASSERT (ta == NULL || ta->action == ta_fill);
5482 /* It is not necessary to fill at the end of a section. Clean this up. */
5483 if (sec->size == offset)
5484 new_removed = removable_space - 0;
5488 int added = -removed - current_removed;
5489 /* Ignore multiples of the section alignment. */
5490 added = ((1 << sec->alignment_power) - 1) & added;
5491 new_removed = (-added);
5493 /* Modify for removable. */
5494 space = removable_space - new_removed;
5495 new_removed = (removable_space
5496 - (((1 << sec->alignment_power) - 1) & space));
5498 return (new_removed - current_removed);
5503 adjust_fill_action (text_action *ta, int fill_diff)
5505 ta->removed_bytes += fill_diff;
5510 text_action_compare (splay_tree_key a, splay_tree_key b)
5512 text_action *pa = (text_action *)a;
5513 text_action *pb = (text_action *)b;
5514 static const int action_priority[] =
5518 [ta_convert_longcall] = 2,
5519 [ta_narrow_insn] = 3,
5520 [ta_remove_insn] = 4,
5521 [ta_remove_longcall] = 5,
5522 [ta_remove_literal] = 6,
5523 [ta_widen_insn] = 7,
5524 [ta_add_literal] = 8,
5527 if (pa->offset == pb->offset)
5529 if (pa->action == pb->action)
5531 return action_priority[pa->action] - action_priority[pb->action];
5534 return pa->offset < pb->offset ? -1 : 1;
5537 static text_action *
5538 action_first (text_action_list *action_list)
5540 splay_tree_node node = splay_tree_min (action_list->tree);
5541 return node ? (text_action *)node->value : NULL;
5544 static text_action *
5545 action_next (text_action_list *action_list, text_action *action)
5547 splay_tree_node node = splay_tree_successor (action_list->tree,
5548 (splay_tree_key)action);
5549 return node ? (text_action *)node->value : NULL;
5552 /* Add a modification action to the text. For the case of adding or
5553 removing space, modify any current fill and assume that
5554 "unreachable_space" bytes can be freely contracted. Note that a
5555 negative removed value is a fill. */
5558 text_action_add (text_action_list *l,
5559 text_action_t action,
5567 /* It is not necessary to fill at the end of a section. */
5568 if (action == ta_fill && sec->size == offset)
5571 /* It is not necessary to fill 0 bytes. */
5572 if (action == ta_fill && removed == 0)
5578 if (action == ta_fill)
5580 splay_tree_node node = splay_tree_lookup (l->tree, (splay_tree_key)&a);
5584 ta = (text_action *)node->value;
5585 ta->removed_bytes += removed;
5590 BFD_ASSERT (splay_tree_lookup (l->tree, (splay_tree_key)&a) == NULL);
5592 ta = (text_action *) bfd_zmalloc (sizeof (text_action));
5593 ta->action = action;
5595 ta->offset = offset;
5596 ta->removed_bytes = removed;
5597 splay_tree_insert (l->tree, (splay_tree_key)ta, (splay_tree_value)ta);
5603 text_action_add_literal (text_action_list *l,
5604 text_action_t action,
5606 const literal_value *value,
5610 asection *sec = r_reloc_get_section (loc);
5611 bfd_vma offset = loc->target_offset;
5612 bfd_vma virtual_offset = loc->virtual_offset;
5614 BFD_ASSERT (action == ta_add_literal);
5616 /* Create a new record and fill it up. */
5617 ta = (text_action *) bfd_zmalloc (sizeof (text_action));
5618 ta->action = action;
5620 ta->offset = offset;
5621 ta->virtual_offset = virtual_offset;
5623 ta->removed_bytes = removed;
5625 BFD_ASSERT (splay_tree_lookup (l->tree, (splay_tree_key)ta) == NULL);
5626 splay_tree_insert (l->tree, (splay_tree_key)ta, (splay_tree_value)ta);
5631 /* Find the total offset adjustment for the relaxations specified by
5632 text_actions, beginning from a particular starting action. This is
5633 typically used from offset_with_removed_text to search an entire list of
5634 actions, but it may also be called directly when adjusting adjacent offsets
5635 so that each search may begin where the previous one left off. */
5638 removed_by_actions (text_action_list *action_list,
5639 text_action **p_start_action,
5641 bfd_boolean before_fill)
5646 r = *p_start_action;
5649 splay_tree_node node = splay_tree_lookup (action_list->tree,
5651 BFD_ASSERT (node != NULL && r == (text_action *)node->value);
5656 if (r->offset > offset)
5659 if (r->offset == offset
5660 && (before_fill || r->action != ta_fill || r->removed_bytes >= 0))
5663 removed += r->removed_bytes;
5665 r = action_next (action_list, r);
5668 *p_start_action = r;
5674 offset_with_removed_text (text_action_list *action_list, bfd_vma offset)
5676 text_action *r = action_first (action_list);
5678 return offset - removed_by_actions (action_list, &r, offset, FALSE);
5683 action_list_count (text_action_list *action_list)
5685 return action_list->count;
5688 typedef struct map_action_fn_context_struct map_action_fn_context;
5689 struct map_action_fn_context_struct
5692 removal_by_action_map map;
5693 bfd_boolean eq_complete;
5697 map_action_fn (splay_tree_node node, void *p)
5699 map_action_fn_context *ctx = p;
5700 text_action *r = (text_action *)node->value;
5701 removal_by_action_entry *ientry = ctx->map.entry + ctx->map.n_entries;
5703 if (ctx->map.n_entries && (ientry - 1)->offset == r->offset)
5709 ++ctx->map.n_entries;
5710 ctx->eq_complete = FALSE;
5711 ientry->offset = r->offset;
5712 ientry->eq_removed_before_fill = ctx->removed;
5715 if (!ctx->eq_complete)
5717 if (r->action != ta_fill || r->removed_bytes >= 0)
5719 ientry->eq_removed = ctx->removed;
5720 ctx->eq_complete = TRUE;
5723 ientry->eq_removed = ctx->removed + r->removed_bytes;
5726 ctx->removed += r->removed_bytes;
5727 ientry->removed = ctx->removed;
5732 map_removal_by_action (text_action_list *action_list)
5734 map_action_fn_context ctx;
5737 ctx.map.n_entries = 0;
5738 ctx.map.entry = bfd_malloc (action_list_count (action_list) *
5739 sizeof (removal_by_action_entry));
5740 ctx.eq_complete = FALSE;
5742 splay_tree_foreach (action_list->tree, map_action_fn, &ctx);
5743 action_list->map = ctx.map;
5747 removed_by_actions_map (text_action_list *action_list, bfd_vma offset,
5748 bfd_boolean before_fill)
5752 if (!action_list->map.entry)
5753 map_removal_by_action (action_list);
5755 if (!action_list->map.n_entries)
5759 b = action_list->map.n_entries;
5763 unsigned c = (a + b) / 2;
5765 if (action_list->map.entry[c].offset <= offset)
5771 if (action_list->map.entry[a].offset < offset)
5773 return action_list->map.entry[a].removed;
5775 else if (action_list->map.entry[a].offset == offset)
5777 return before_fill ?
5778 action_list->map.entry[a].eq_removed_before_fill :
5779 action_list->map.entry[a].eq_removed;
5788 offset_with_removed_text_map (text_action_list *action_list, bfd_vma offset)
5790 int removed = removed_by_actions_map (action_list, offset, FALSE);
5791 return offset - removed;
5795 /* The find_insn_action routine will only find non-fill actions. */
5797 static text_action *
5798 find_insn_action (text_action_list *action_list, bfd_vma offset)
5800 static const text_action_t action[] =
5802 ta_convert_longcall,
5812 for (i = 0; i < sizeof (action) / sizeof (*action); ++i)
5814 splay_tree_node node;
5816 a.action = action[i];
5817 node = splay_tree_lookup (action_list->tree, (splay_tree_key)&a);
5819 return (text_action *)node->value;
5828 print_action (FILE *fp, text_action *r)
5830 const char *t = "unknown";
5833 case ta_remove_insn:
5834 t = "remove_insn"; break;
5835 case ta_remove_longcall:
5836 t = "remove_longcall"; break;
5837 case ta_convert_longcall:
5838 t = "convert_longcall"; break;
5839 case ta_narrow_insn:
5840 t = "narrow_insn"; break;
5842 t = "widen_insn"; break;
5847 case ta_remove_literal:
5848 t = "remove_literal"; break;
5849 case ta_add_literal:
5850 t = "add_literal"; break;
5853 fprintf (fp, "%s: %s[0x%lx] \"%s\" %d\n",
5854 r->sec->owner->filename,
5855 r->sec->name, (unsigned long) r->offset, t, r->removed_bytes);
5859 print_action_list_fn (splay_tree_node node, void *p)
5861 text_action *r = (text_action *)node->value;
5863 print_action (p, r);
5868 print_action_list (FILE *fp, text_action_list *action_list)
5870 fprintf (fp, "Text Action\n");
5871 splay_tree_foreach (action_list->tree, print_action_list_fn, fp);
5877 /* Lists of literals being coalesced or removed. */
5879 /* In the usual case, the literal identified by "from" is being
5880 coalesced with another literal identified by "to". If the literal is
5881 unused and is being removed altogether, "to.abfd" will be NULL.
5882 The removed_literal entries are kept on a per-section list, sorted
5883 by the "from" offset field. */
5885 typedef struct removed_literal_struct removed_literal;
5886 typedef struct removed_literal_map_entry_struct removed_literal_map_entry;
5887 typedef struct removed_literal_list_struct removed_literal_list;
5889 struct removed_literal_struct
5893 removed_literal *next;
5896 struct removed_literal_map_entry_struct
5899 removed_literal *literal;
5902 struct removed_literal_list_struct
5904 removed_literal *head;
5905 removed_literal *tail;
5908 removed_literal_map_entry *map;
5912 /* Record that the literal at "from" is being removed. If "to" is not
5913 NULL, the "from" literal is being coalesced with the "to" literal. */
5916 add_removed_literal (removed_literal_list *removed_list,
5917 const r_reloc *from,
5920 removed_literal *r, *new_r, *next_r;
5922 new_r = (removed_literal *) bfd_zmalloc (sizeof (removed_literal));
5924 new_r->from = *from;
5928 new_r->to.abfd = NULL;
5931 r = removed_list->head;
5934 removed_list->head = new_r;
5935 removed_list->tail = new_r;
5937 /* Special check for common case of append. */
5938 else if (removed_list->tail->from.target_offset < from->target_offset)
5940 removed_list->tail->next = new_r;
5941 removed_list->tail = new_r;
5945 while (r->from.target_offset < from->target_offset && r->next)
5951 new_r->next = next_r;
5953 removed_list->tail = new_r;
5958 map_removed_literal (removed_literal_list *removed_list)
5962 removed_literal_map_entry *map = NULL;
5963 removed_literal *r = removed_list->head;
5965 for (i = 0; r; ++i, r = r->next)
5969 n_map = (n_map * 2) + 2;
5970 map = bfd_realloc (map, n_map * sizeof (*map));
5972 map[i].addr = r->from.target_offset;
5975 removed_list->map = map;
5976 removed_list->n_map = i;
5980 removed_literal_compare (const void *a, const void *b)
5982 const removed_literal_map_entry *pa = a;
5983 const removed_literal_map_entry *pb = b;
5985 if (pa->addr == pb->addr)
5988 return pa->addr < pb->addr ? -1 : 1;
5991 /* Check if the list of removed literals contains an entry for the
5992 given address. Return the entry if found. */
5994 static removed_literal *
5995 find_removed_literal (removed_literal_list *removed_list, bfd_vma addr)
5997 removed_literal_map_entry *p;
5998 removed_literal *r = NULL;
6000 if (removed_list->map == NULL)
6001 map_removed_literal (removed_list);
6003 p = bsearch (&addr, removed_list->map, removed_list->n_map,
6004 sizeof (*removed_list->map), removed_literal_compare);
6007 while (p != removed_list->map && (p - 1)->addr == addr)
6018 print_removed_literals (FILE *fp, removed_literal_list *removed_list)
6021 r = removed_list->head;
6023 fprintf (fp, "Removed Literals\n");
6024 for (; r != NULL; r = r->next)
6026 print_r_reloc (fp, &r->from);
6027 fprintf (fp, " => ");
6028 if (r->to.abfd == NULL)
6029 fprintf (fp, "REMOVED");
6031 print_r_reloc (fp, &r->to);
6039 /* Per-section data for relaxation. */
6041 typedef struct reloc_bfd_fix_struct reloc_bfd_fix;
6043 struct xtensa_relax_info_struct
6045 bfd_boolean is_relaxable_literal_section;
6046 bfd_boolean is_relaxable_asm_section;
6047 int visited; /* Number of times visited. */
6049 source_reloc *src_relocs; /* Array[src_count]. */
6051 int src_next; /* Next src_relocs entry to assign. */
6053 removed_literal_list removed_list;
6054 text_action_list action_list;
6056 reloc_bfd_fix *fix_list;
6057 reloc_bfd_fix *fix_array;
6058 unsigned fix_array_count;
6060 /* Support for expanding the reloc array that is stored
6061 in the section structure. If the relocations have been
6062 reallocated, the newly allocated relocations will be referenced
6063 here along with the actual size allocated. The relocation
6064 count will always be found in the section structure. */
6065 Elf_Internal_Rela *allocated_relocs;
6066 unsigned relocs_count;
6067 unsigned allocated_relocs_count;
6070 struct elf_xtensa_section_data
6072 struct bfd_elf_section_data elf;
6073 xtensa_relax_info relax_info;
6078 elf_xtensa_new_section_hook (bfd *abfd, asection *sec)
6080 if (!sec->used_by_bfd)
6082 struct elf_xtensa_section_data *sdata;
6083 bfd_size_type amt = sizeof (*sdata);
6085 sdata = bfd_zalloc (abfd, amt);
6088 sec->used_by_bfd = sdata;
6091 return _bfd_elf_new_section_hook (abfd, sec);
6095 static xtensa_relax_info *
6096 get_xtensa_relax_info (asection *sec)
6098 struct elf_xtensa_section_data *section_data;
6100 /* No info available if no section or if it is an output section. */
6101 if (!sec || sec == sec->output_section)
6104 section_data = (struct elf_xtensa_section_data *) elf_section_data (sec);
6105 return §ion_data->relax_info;
6110 init_xtensa_relax_info (asection *sec)
6112 xtensa_relax_info *relax_info = get_xtensa_relax_info (sec);
6114 relax_info->is_relaxable_literal_section = FALSE;
6115 relax_info->is_relaxable_asm_section = FALSE;
6116 relax_info->visited = 0;
6118 relax_info->src_relocs = NULL;
6119 relax_info->src_count = 0;
6120 relax_info->src_next = 0;
6122 relax_info->removed_list.head = NULL;
6123 relax_info->removed_list.tail = NULL;
6125 relax_info->action_list.tree = splay_tree_new (text_action_compare,
6127 relax_info->action_list.map.n_entries = 0;
6128 relax_info->action_list.map.entry = NULL;
6130 relax_info->fix_list = NULL;
6131 relax_info->fix_array = NULL;
6132 relax_info->fix_array_count = 0;
6134 relax_info->allocated_relocs = NULL;
6135 relax_info->relocs_count = 0;
6136 relax_info->allocated_relocs_count = 0;
6140 /* Coalescing literals may require a relocation to refer to a section in
6141 a different input file, but the standard relocation information
6142 cannot express that. Instead, the reloc_bfd_fix structures are used
6143 to "fix" the relocations that refer to sections in other input files.
6144 These structures are kept on per-section lists. The "src_type" field
6145 records the relocation type in case there are multiple relocations on
6146 the same location. FIXME: This is ugly; an alternative might be to
6147 add new symbols with the "owner" field to some other input file. */
6149 struct reloc_bfd_fix_struct
6153 unsigned src_type; /* Relocation type. */
6155 asection *target_sec;
6156 bfd_vma target_offset;
6157 bfd_boolean translated;
6159 reloc_bfd_fix *next;
6163 static reloc_bfd_fix *
6164 reloc_bfd_fix_init (asection *src_sec,
6167 asection *target_sec,
6168 bfd_vma target_offset,
6169 bfd_boolean translated)
6173 fix = (reloc_bfd_fix *) bfd_malloc (sizeof (reloc_bfd_fix));
6174 fix->src_sec = src_sec;
6175 fix->src_offset = src_offset;
6176 fix->src_type = src_type;
6177 fix->target_sec = target_sec;
6178 fix->target_offset = target_offset;
6179 fix->translated = translated;
6186 add_fix (asection *src_sec, reloc_bfd_fix *fix)
6188 xtensa_relax_info *relax_info;
6190 relax_info = get_xtensa_relax_info (src_sec);
6191 fix->next = relax_info->fix_list;
6192 relax_info->fix_list = fix;
6197 fix_compare (const void *ap, const void *bp)
6199 const reloc_bfd_fix *a = (const reloc_bfd_fix *) ap;
6200 const reloc_bfd_fix *b = (const reloc_bfd_fix *) bp;
6202 if (a->src_offset != b->src_offset)
6203 return (a->src_offset - b->src_offset);
6204 return (a->src_type - b->src_type);
6209 cache_fix_array (asection *sec)
6211 unsigned i, count = 0;
6213 xtensa_relax_info *relax_info = get_xtensa_relax_info (sec);
6215 if (relax_info == NULL)
6217 if (relax_info->fix_list == NULL)
6220 for (r = relax_info->fix_list; r != NULL; r = r->next)
6223 relax_info->fix_array =
6224 (reloc_bfd_fix *) bfd_malloc (sizeof (reloc_bfd_fix) * count);
6225 relax_info->fix_array_count = count;
6227 r = relax_info->fix_list;
6228 for (i = 0; i < count; i++, r = r->next)
6230 relax_info->fix_array[count - 1 - i] = *r;
6231 relax_info->fix_array[count - 1 - i].next = NULL;
6234 qsort (relax_info->fix_array, relax_info->fix_array_count,
6235 sizeof (reloc_bfd_fix), fix_compare);
6239 static reloc_bfd_fix *
6240 get_bfd_fix (asection *sec, bfd_vma offset, unsigned type)
6242 xtensa_relax_info *relax_info = get_xtensa_relax_info (sec);
6246 if (relax_info == NULL)
6248 if (relax_info->fix_list == NULL)
6251 if (relax_info->fix_array == NULL)
6252 cache_fix_array (sec);
6254 key.src_offset = offset;
6255 key.src_type = type;
6256 rv = bsearch (&key, relax_info->fix_array, relax_info->fix_array_count,
6257 sizeof (reloc_bfd_fix), fix_compare);
6262 /* Section caching. */
6264 typedef struct section_cache_struct section_cache_t;
6266 struct section_cache_struct
6270 bfd_byte *contents; /* Cache of the section contents. */
6271 bfd_size_type content_length;
6273 property_table_entry *ptbl; /* Cache of the section property table. */
6276 Elf_Internal_Rela *relocs; /* Cache of the section relocations. */
6277 unsigned reloc_count;
6282 init_section_cache (section_cache_t *sec_cache)
6284 memset (sec_cache, 0, sizeof (*sec_cache));
6289 free_section_cache (section_cache_t *sec_cache)
6293 release_contents (sec_cache->sec, sec_cache->contents);
6294 release_internal_relocs (sec_cache->sec, sec_cache->relocs);
6295 if (sec_cache->ptbl)
6296 free (sec_cache->ptbl);
6302 section_cache_section (section_cache_t *sec_cache,
6304 struct bfd_link_info *link_info)
6307 property_table_entry *prop_table = NULL;
6309 bfd_byte *contents = NULL;
6310 Elf_Internal_Rela *internal_relocs = NULL;
6311 bfd_size_type sec_size;
6315 if (sec == sec_cache->sec)
6319 sec_size = bfd_get_section_limit (abfd, sec);
6321 /* Get the contents. */
6322 contents = retrieve_contents (abfd, sec, link_info->keep_memory);
6323 if (contents == NULL && sec_size != 0)
6326 /* Get the relocations. */
6327 internal_relocs = retrieve_internal_relocs (abfd, sec,
6328 link_info->keep_memory);
6330 /* Get the entry table. */
6331 ptblsize = xtensa_read_table_entries (abfd, sec, &prop_table,
6332 XTENSA_PROP_SEC_NAME, FALSE);
6336 /* Fill in the new section cache. */
6337 free_section_cache (sec_cache);
6338 init_section_cache (sec_cache);
6340 sec_cache->sec = sec;
6341 sec_cache->contents = contents;
6342 sec_cache->content_length = sec_size;
6343 sec_cache->relocs = internal_relocs;
6344 sec_cache->reloc_count = sec->reloc_count;
6345 sec_cache->pte_count = ptblsize;
6346 sec_cache->ptbl = prop_table;
6351 release_contents (sec, contents);
6352 release_internal_relocs (sec, internal_relocs);
6359 /* Extended basic blocks. */
6361 /* An ebb_struct represents an Extended Basic Block. Within this
6362 range, we guarantee that all instructions are decodable, the
6363 property table entries are contiguous, and no property table
6364 specifies a segment that cannot have instructions moved. This
6365 structure contains caches of the contents, property table and
6366 relocations for the specified section for easy use. The range is
6367 specified by ranges of indices for the byte offset, property table
6368 offsets and relocation offsets. These must be consistent. */
6370 typedef struct ebb_struct ebb_t;
6376 bfd_byte *contents; /* Cache of the section contents. */
6377 bfd_size_type content_length;
6379 property_table_entry *ptbl; /* Cache of the section property table. */
6382 Elf_Internal_Rela *relocs; /* Cache of the section relocations. */
6383 unsigned reloc_count;
6385 bfd_vma start_offset; /* Offset in section. */
6386 unsigned start_ptbl_idx; /* Offset in the property table. */
6387 unsigned start_reloc_idx; /* Offset in the relocations. */
6390 unsigned end_ptbl_idx;
6391 unsigned end_reloc_idx;
6393 bfd_boolean ends_section; /* Is this the last ebb in a section? */
6395 /* The unreachable property table at the end of this set of blocks;
6396 NULL if the end is not an unreachable block. */
6397 property_table_entry *ends_unreachable;
6401 enum ebb_target_enum
6404 EBB_DESIRE_TGT_ALIGN,
6405 EBB_REQUIRE_TGT_ALIGN,
6406 EBB_REQUIRE_LOOP_ALIGN,
6411 /* proposed_action_struct is similar to the text_action_struct except
6412 that is represents a potential transformation, not one that will
6413 occur. We build a list of these for an extended basic block
6414 and use them to compute the actual actions desired. We must be
6415 careful that the entire set of actual actions we perform do not
6416 break any relocations that would fit if the actions were not
6419 typedef struct proposed_action_struct proposed_action;
6421 struct proposed_action_struct
6423 enum ebb_target_enum align_type; /* for the target alignment */
6424 bfd_vma alignment_pow;
6425 text_action_t action;
6428 bfd_boolean do_action; /* If false, then we will not perform the action. */
6432 /* The ebb_constraint_struct keeps a set of proposed actions for an
6433 extended basic block. */
6435 typedef struct ebb_constraint_struct ebb_constraint;
6437 struct ebb_constraint_struct
6440 bfd_boolean start_movable;
6442 /* Bytes of extra space at the beginning if movable. */
6443 int start_extra_space;
6445 enum ebb_target_enum start_align;
6447 bfd_boolean end_movable;
6449 /* Bytes of extra space at the end if movable. */
6450 int end_extra_space;
6452 unsigned action_count;
6453 unsigned action_allocated;
6455 /* Array of proposed actions. */
6456 proposed_action *actions;
6458 /* Action alignments -- one for each proposed action. */
6459 enum ebb_target_enum *action_aligns;
6464 init_ebb_constraint (ebb_constraint *c)
6466 memset (c, 0, sizeof (ebb_constraint));
6471 free_ebb_constraint (ebb_constraint *c)
6479 init_ebb (ebb_t *ebb,
6482 bfd_size_type content_length,
6483 property_table_entry *prop_table,
6485 Elf_Internal_Rela *internal_relocs,
6486 unsigned reloc_count)
6488 memset (ebb, 0, sizeof (ebb_t));
6490 ebb->contents = contents;
6491 ebb->content_length = content_length;
6492 ebb->ptbl = prop_table;
6493 ebb->pte_count = ptblsize;
6494 ebb->relocs = internal_relocs;
6495 ebb->reloc_count = reloc_count;
6496 ebb->start_offset = 0;
6497 ebb->end_offset = ebb->content_length - 1;
6498 ebb->start_ptbl_idx = 0;
6499 ebb->end_ptbl_idx = ptblsize;
6500 ebb->start_reloc_idx = 0;
6501 ebb->end_reloc_idx = reloc_count;
6505 /* Extend the ebb to all decodable contiguous sections. The algorithm
6506 for building a basic block around an instruction is to push it
6507 forward until we hit the end of a section, an unreachable block or
6508 a block that cannot be transformed. Then we push it backwards
6509 searching for similar conditions. */
6511 static bfd_boolean extend_ebb_bounds_forward (ebb_t *);
6512 static bfd_boolean extend_ebb_bounds_backward (ebb_t *);
6513 static bfd_size_type insn_block_decodable_len
6514 (bfd_byte *, bfd_size_type, bfd_vma, bfd_size_type);
6517 extend_ebb_bounds (ebb_t *ebb)
6519 if (!extend_ebb_bounds_forward (ebb))
6521 if (!extend_ebb_bounds_backward (ebb))
6528 extend_ebb_bounds_forward (ebb_t *ebb)
6530 property_table_entry *the_entry, *new_entry;
6532 the_entry = &ebb->ptbl[ebb->end_ptbl_idx];
6534 /* Stop when (1) we cannot decode an instruction, (2) we are at
6535 the end of the property tables, (3) we hit a non-contiguous property
6536 table entry, (4) we hit a NO_TRANSFORM region. */
6541 bfd_size_type insn_block_len;
6543 entry_end = the_entry->address - ebb->sec->vma + the_entry->size;
6545 insn_block_decodable_len (ebb->contents, ebb->content_length,
6547 entry_end - ebb->end_offset);
6548 if (insn_block_len != (entry_end - ebb->end_offset))
6551 /* xgettext:c-format */
6552 (_("%B(%A+%#Lx): could not decode instruction; "
6553 "possible configuration mismatch"),
6554 ebb->sec->owner, ebb->sec, ebb->end_offset + insn_block_len);
6557 ebb->end_offset += insn_block_len;
6559 if (ebb->end_offset == ebb->sec->size)
6560 ebb->ends_section = TRUE;
6562 /* Update the reloc counter. */
6563 while (ebb->end_reloc_idx + 1 < ebb->reloc_count
6564 && (ebb->relocs[ebb->end_reloc_idx + 1].r_offset
6567 ebb->end_reloc_idx++;
6570 if (ebb->end_ptbl_idx + 1 == ebb->pte_count)
6573 new_entry = &ebb->ptbl[ebb->end_ptbl_idx + 1];
6574 if (((new_entry->flags & XTENSA_PROP_INSN) == 0)
6575 || ((new_entry->flags & XTENSA_PROP_NO_TRANSFORM) != 0)
6576 || ((the_entry->flags & XTENSA_PROP_ALIGN) != 0))
6579 if (the_entry->address + the_entry->size != new_entry->address)
6582 the_entry = new_entry;
6583 ebb->end_ptbl_idx++;
6586 /* Quick check for an unreachable or end of file just at the end. */
6587 if (ebb->end_ptbl_idx + 1 == ebb->pte_count)
6589 if (ebb->end_offset == ebb->content_length)
6590 ebb->ends_section = TRUE;
6594 new_entry = &ebb->ptbl[ebb->end_ptbl_idx + 1];
6595 if ((new_entry->flags & XTENSA_PROP_UNREACHABLE) != 0
6596 && the_entry->address + the_entry->size == new_entry->address)
6597 ebb->ends_unreachable = new_entry;
6600 /* Any other ending requires exact alignment. */
6606 extend_ebb_bounds_backward (ebb_t *ebb)
6608 property_table_entry *the_entry, *new_entry;
6610 the_entry = &ebb->ptbl[ebb->start_ptbl_idx];
6612 /* Stop when (1) we cannot decode the instructions in the current entry.
6613 (2) we are at the beginning of the property tables, (3) we hit a
6614 non-contiguous property table entry, (4) we hit a NO_TRANSFORM region. */
6618 bfd_vma block_begin;
6619 bfd_size_type insn_block_len;
6621 block_begin = the_entry->address - ebb->sec->vma;
6623 insn_block_decodable_len (ebb->contents, ebb->content_length,
6625 ebb->start_offset - block_begin);
6626 if (insn_block_len != ebb->start_offset - block_begin)
6629 /* xgettext:c-format */
6630 (_("%B(%A+%#Lx): could not decode instruction; "
6631 "possible configuration mismatch"),
6632 ebb->sec->owner, ebb->sec, ebb->end_offset + insn_block_len);
6635 ebb->start_offset -= insn_block_len;
6637 /* Update the reloc counter. */
6638 while (ebb->start_reloc_idx > 0
6639 && (ebb->relocs[ebb->start_reloc_idx - 1].r_offset
6640 >= ebb->start_offset))
6642 ebb->start_reloc_idx--;
6645 if (ebb->start_ptbl_idx == 0)
6648 new_entry = &ebb->ptbl[ebb->start_ptbl_idx - 1];
6649 if ((new_entry->flags & XTENSA_PROP_INSN) == 0
6650 || ((new_entry->flags & XTENSA_PROP_NO_TRANSFORM) != 0)
6651 || ((new_entry->flags & XTENSA_PROP_ALIGN) != 0))
6653 if (new_entry->address + new_entry->size != the_entry->address)
6656 the_entry = new_entry;
6657 ebb->start_ptbl_idx--;
6663 static bfd_size_type
6664 insn_block_decodable_len (bfd_byte *contents,
6665 bfd_size_type content_len,
6666 bfd_vma block_offset,
6667 bfd_size_type block_len)
6669 bfd_vma offset = block_offset;
6671 while (offset < block_offset + block_len)
6673 bfd_size_type insn_len = 0;
6675 insn_len = insn_decode_len (contents, content_len, offset);
6677 return (offset - block_offset);
6680 return (offset - block_offset);
6685 ebb_propose_action (ebb_constraint *c,
6686 enum ebb_target_enum align_type,
6687 bfd_vma alignment_pow,
6688 text_action_t action,
6691 bfd_boolean do_action)
6693 proposed_action *act;
6695 if (c->action_allocated <= c->action_count)
6697 unsigned new_allocated, i;
6698 proposed_action *new_actions;
6700 new_allocated = (c->action_count + 2) * 2;
6701 new_actions = (proposed_action *)
6702 bfd_zmalloc (sizeof (proposed_action) * new_allocated);
6704 for (i = 0; i < c->action_count; i++)
6705 new_actions[i] = c->actions[i];
6708 c->actions = new_actions;
6709 c->action_allocated = new_allocated;
6712 act = &c->actions[c->action_count];
6713 act->align_type = align_type;
6714 act->alignment_pow = alignment_pow;
6715 act->action = action;
6716 act->offset = offset;
6717 act->removed_bytes = removed_bytes;
6718 act->do_action = do_action;
6724 /* Access to internal relocations, section contents and symbols. */
6726 /* During relaxation, we need to modify relocations, section contents,
6727 and symbol definitions, and we need to keep the original values from
6728 being reloaded from the input files, i.e., we need to "pin" the
6729 modified values in memory. We also want to continue to observe the
6730 setting of the "keep-memory" flag. The following functions wrap the
6731 standard BFD functions to take care of this for us. */
6733 static Elf_Internal_Rela *
6734 retrieve_internal_relocs (bfd *abfd, asection *sec, bfd_boolean keep_memory)
6736 Elf_Internal_Rela *internal_relocs;
6738 if ((sec->flags & SEC_LINKER_CREATED) != 0)
6741 internal_relocs = elf_section_data (sec)->relocs;
6742 if (internal_relocs == NULL)
6743 internal_relocs = (_bfd_elf_link_read_relocs
6744 (abfd, sec, NULL, NULL, keep_memory));
6745 return internal_relocs;
6750 pin_internal_relocs (asection *sec, Elf_Internal_Rela *internal_relocs)
6752 elf_section_data (sec)->relocs = internal_relocs;
6757 release_internal_relocs (asection *sec, Elf_Internal_Rela *internal_relocs)
6760 && elf_section_data (sec)->relocs != internal_relocs)
6761 free (internal_relocs);
6766 retrieve_contents (bfd *abfd, asection *sec, bfd_boolean keep_memory)
6769 bfd_size_type sec_size;
6771 sec_size = bfd_get_section_limit (abfd, sec);
6772 contents = elf_section_data (sec)->this_hdr.contents;
6774 if (contents == NULL && sec_size != 0)
6776 if (!bfd_malloc_and_get_section (abfd, sec, &contents))
6783 elf_section_data (sec)->this_hdr.contents = contents;
6790 pin_contents (asection *sec, bfd_byte *contents)
6792 elf_section_data (sec)->this_hdr.contents = contents;
6797 release_contents (asection *sec, bfd_byte *contents)
6799 if (contents && elf_section_data (sec)->this_hdr.contents != contents)
6804 static Elf_Internal_Sym *
6805 retrieve_local_syms (bfd *input_bfd)
6807 Elf_Internal_Shdr *symtab_hdr;
6808 Elf_Internal_Sym *isymbuf;
6811 symtab_hdr = &elf_tdata (input_bfd)->symtab_hdr;
6812 locsymcount = symtab_hdr->sh_info;
6814 isymbuf = (Elf_Internal_Sym *) symtab_hdr->contents;
6815 if (isymbuf == NULL && locsymcount != 0)
6816 isymbuf = bfd_elf_get_elf_syms (input_bfd, symtab_hdr, locsymcount, 0,
6819 /* Save the symbols for this input file so they won't be read again. */
6820 if (isymbuf && isymbuf != (Elf_Internal_Sym *) symtab_hdr->contents)
6821 symtab_hdr->contents = (unsigned char *) isymbuf;
6827 /* Code for link-time relaxation. */
6829 /* Initialization for relaxation: */
6830 static bfd_boolean analyze_relocations (struct bfd_link_info *);
6831 static bfd_boolean find_relaxable_sections
6832 (bfd *, asection *, struct bfd_link_info *, bfd_boolean *);
6833 static bfd_boolean collect_source_relocs
6834 (bfd *, asection *, struct bfd_link_info *);
6835 static bfd_boolean is_resolvable_asm_expansion
6836 (bfd *, asection *, bfd_byte *, Elf_Internal_Rela *, struct bfd_link_info *,
6838 static Elf_Internal_Rela *find_associated_l32r_irel
6839 (bfd *, asection *, bfd_byte *, Elf_Internal_Rela *, Elf_Internal_Rela *);
6840 static bfd_boolean compute_text_actions
6841 (bfd *, asection *, struct bfd_link_info *);
6842 static bfd_boolean compute_ebb_proposed_actions (ebb_constraint *);
6843 static bfd_boolean compute_ebb_actions (ebb_constraint *);
6844 typedef struct reloc_range_list_struct reloc_range_list;
6845 static bfd_boolean check_section_ebb_pcrels_fit
6846 (bfd *, asection *, bfd_byte *, Elf_Internal_Rela *,
6847 reloc_range_list *, const ebb_constraint *,
6848 const xtensa_opcode *);
6849 static bfd_boolean check_section_ebb_reduces (const ebb_constraint *);
6850 static void text_action_add_proposed
6851 (text_action_list *, const ebb_constraint *, asection *);
6852 static int compute_fill_extra_space (property_table_entry *);
6855 static bfd_boolean compute_removed_literals
6856 (bfd *, asection *, struct bfd_link_info *, value_map_hash_table *);
6857 static Elf_Internal_Rela *get_irel_at_offset
6858 (asection *, Elf_Internal_Rela *, bfd_vma);
6859 static bfd_boolean is_removable_literal
6860 (const source_reloc *, int, const source_reloc *, int, asection *,
6861 property_table_entry *, int);
6862 static bfd_boolean remove_dead_literal
6863 (bfd *, asection *, struct bfd_link_info *, Elf_Internal_Rela *,
6864 Elf_Internal_Rela *, source_reloc *, property_table_entry *, int);
6865 static bfd_boolean identify_literal_placement
6866 (bfd *, asection *, bfd_byte *, struct bfd_link_info *,
6867 value_map_hash_table *, bfd_boolean *, Elf_Internal_Rela *, int,
6868 source_reloc *, property_table_entry *, int, section_cache_t *,
6870 static bfd_boolean relocations_reach (source_reloc *, int, const r_reloc *);
6871 static bfd_boolean coalesce_shared_literal
6872 (asection *, source_reloc *, property_table_entry *, int, value_map *);
6873 static bfd_boolean move_shared_literal
6874 (asection *, struct bfd_link_info *, source_reloc *, property_table_entry *,
6875 int, const r_reloc *, const literal_value *, section_cache_t *);
6878 static bfd_boolean relax_section (bfd *, asection *, struct bfd_link_info *);
6879 static bfd_boolean translate_section_fixes (asection *);
6880 static bfd_boolean translate_reloc_bfd_fix (reloc_bfd_fix *);
6881 static asection *translate_reloc (const r_reloc *, r_reloc *, asection *);
6882 static void shrink_dynamic_reloc_sections
6883 (struct bfd_link_info *, bfd *, asection *, Elf_Internal_Rela *);
6884 static bfd_boolean move_literal
6885 (bfd *, struct bfd_link_info *, asection *, bfd_vma, bfd_byte *,
6886 xtensa_relax_info *, Elf_Internal_Rela **, const literal_value *);
6887 static bfd_boolean relax_property_section
6888 (bfd *, asection *, struct bfd_link_info *);
6891 static bfd_boolean relax_section_symbols (bfd *, asection *);
6895 elf_xtensa_relax_section (bfd *abfd,
6897 struct bfd_link_info *link_info,
6900 static value_map_hash_table *values = NULL;
6901 static bfd_boolean relocations_analyzed = FALSE;
6902 xtensa_relax_info *relax_info;
6904 if (!relocations_analyzed)
6906 /* Do some overall initialization for relaxation. */
6907 values = value_map_hash_table_init ();
6910 relaxing_section = TRUE;
6911 if (!analyze_relocations (link_info))
6913 relocations_analyzed = TRUE;
6917 /* Don't mess with linker-created sections. */
6918 if ((sec->flags & SEC_LINKER_CREATED) != 0)
6921 relax_info = get_xtensa_relax_info (sec);
6922 BFD_ASSERT (relax_info != NULL);
6924 switch (relax_info->visited)
6927 /* Note: It would be nice to fold this pass into
6928 analyze_relocations, but it is important for this step that the
6929 sections be examined in link order. */
6930 if (!compute_removed_literals (abfd, sec, link_info, values))
6937 value_map_hash_table_delete (values);
6939 if (!relax_section (abfd, sec, link_info))
6945 if (!relax_section_symbols (abfd, sec))
6950 relax_info->visited++;
6955 /* Initialization for relaxation. */
6957 /* This function is called once at the start of relaxation. It scans
6958 all the input sections and marks the ones that are relaxable (i.e.,
6959 literal sections with L32R relocations against them), and then
6960 collects source_reloc information for all the relocations against
6961 those relaxable sections. During this process, it also detects
6962 longcalls, i.e., calls relaxed by the assembler into indirect
6963 calls, that can be optimized back into direct calls. Within each
6964 extended basic block (ebb) containing an optimized longcall, it
6965 computes a set of "text actions" that can be performed to remove
6966 the L32R associated with the longcall while optionally preserving
6967 branch target alignments. */
6970 analyze_relocations (struct bfd_link_info *link_info)
6974 bfd_boolean is_relaxable = FALSE;
6976 /* Initialize the per-section relaxation info. */
6977 for (abfd = link_info->input_bfds; abfd != NULL; abfd = abfd->link.next)
6978 for (sec = abfd->sections; sec != NULL; sec = sec->next)
6980 init_xtensa_relax_info (sec);
6983 /* Mark relaxable sections (and count relocations against each one). */
6984 for (abfd = link_info->input_bfds; abfd != NULL; abfd = abfd->link.next)
6985 for (sec = abfd->sections; sec != NULL; sec = sec->next)
6987 if (!find_relaxable_sections (abfd, sec, link_info, &is_relaxable))
6991 /* Bail out if there are no relaxable sections. */
6995 /* Allocate space for source_relocs. */
6996 for (abfd = link_info->input_bfds; abfd != NULL; abfd = abfd->link.next)
6997 for (sec = abfd->sections; sec != NULL; sec = sec->next)
6999 xtensa_relax_info *relax_info;
7001 relax_info = get_xtensa_relax_info (sec);
7002 if (relax_info->is_relaxable_literal_section
7003 || relax_info->is_relaxable_asm_section)
7005 relax_info->src_relocs = (source_reloc *)
7006 bfd_malloc (relax_info->src_count * sizeof (source_reloc));
7009 relax_info->src_count = 0;
7012 /* Collect info on relocations against each relaxable section. */
7013 for (abfd = link_info->input_bfds; abfd != NULL; abfd = abfd->link.next)
7014 for (sec = abfd->sections; sec != NULL; sec = sec->next)
7016 if (!collect_source_relocs (abfd, sec, link_info))
7020 /* Compute the text actions. */
7021 for (abfd = link_info->input_bfds; abfd != NULL; abfd = abfd->link.next)
7022 for (sec = abfd->sections; sec != NULL; sec = sec->next)
7024 if (!compute_text_actions (abfd, sec, link_info))
7032 /* Find all the sections that might be relaxed. The motivation for
7033 this pass is that collect_source_relocs() needs to record _all_ the
7034 relocations that target each relaxable section. That is expensive
7035 and unnecessary unless the target section is actually going to be
7036 relaxed. This pass identifies all such sections by checking if
7037 they have L32Rs pointing to them. In the process, the total number
7038 of relocations targeting each section is also counted so that we
7039 know how much space to allocate for source_relocs against each
7040 relaxable literal section. */
7043 find_relaxable_sections (bfd *abfd,
7045 struct bfd_link_info *link_info,
7046 bfd_boolean *is_relaxable_p)
7048 Elf_Internal_Rela *internal_relocs;
7050 bfd_boolean ok = TRUE;
7052 xtensa_relax_info *source_relax_info;
7053 bfd_boolean is_l32r_reloc;
7055 internal_relocs = retrieve_internal_relocs (abfd, sec,
7056 link_info->keep_memory);
7057 if (internal_relocs == NULL)
7060 contents = retrieve_contents (abfd, sec, link_info->keep_memory);
7061 if (contents == NULL && sec->size != 0)
7067 source_relax_info = get_xtensa_relax_info (sec);
7068 for (i = 0; i < sec->reloc_count; i++)
7070 Elf_Internal_Rela *irel = &internal_relocs[i];
7072 asection *target_sec;
7073 xtensa_relax_info *target_relax_info;
7075 /* If this section has not already been marked as "relaxable", and
7076 if it contains any ASM_EXPAND relocations (marking expanded
7077 longcalls) that can be optimized into direct calls, then mark
7078 the section as "relaxable". */
7079 if (source_relax_info
7080 && !source_relax_info->is_relaxable_asm_section
7081 && ELF32_R_TYPE (irel->r_info) == R_XTENSA_ASM_EXPAND)
7083 bfd_boolean is_reachable = FALSE;
7084 if (is_resolvable_asm_expansion (abfd, sec, contents, irel,
7085 link_info, &is_reachable)
7088 source_relax_info->is_relaxable_asm_section = TRUE;
7089 *is_relaxable_p = TRUE;
7093 r_reloc_init (&r_rel, abfd, irel, contents,
7094 bfd_get_section_limit (abfd, sec));
7096 target_sec = r_reloc_get_section (&r_rel);
7097 target_relax_info = get_xtensa_relax_info (target_sec);
7098 if (!target_relax_info)
7101 /* Count PC-relative operand relocations against the target section.
7102 Note: The conditions tested here must match the conditions under
7103 which init_source_reloc is called in collect_source_relocs(). */
7104 is_l32r_reloc = FALSE;
7105 if (is_operand_relocation (ELF32_R_TYPE (irel->r_info)))
7107 xtensa_opcode opcode =
7108 get_relocation_opcode (abfd, sec, contents, irel);
7109 if (opcode != XTENSA_UNDEFINED)
7111 is_l32r_reloc = (opcode == get_l32r_opcode ());
7112 if (!is_alt_relocation (ELF32_R_TYPE (irel->r_info))
7114 target_relax_info->src_count++;
7118 if (is_l32r_reloc && r_reloc_is_defined (&r_rel))
7120 /* Mark the target section as relaxable. */
7121 target_relax_info->is_relaxable_literal_section = TRUE;
7122 *is_relaxable_p = TRUE;
7127 release_contents (sec, contents);
7128 release_internal_relocs (sec, internal_relocs);
7133 /* Record _all_ the relocations that point to relaxable sections, and
7134 get rid of ASM_EXPAND relocs by either converting them to
7135 ASM_SIMPLIFY or by removing them. */
7138 collect_source_relocs (bfd *abfd,
7140 struct bfd_link_info *link_info)
7142 Elf_Internal_Rela *internal_relocs;
7144 bfd_boolean ok = TRUE;
7146 bfd_size_type sec_size;
7148 internal_relocs = retrieve_internal_relocs (abfd, sec,
7149 link_info->keep_memory);
7150 if (internal_relocs == NULL)
7153 sec_size = bfd_get_section_limit (abfd, sec);
7154 contents = retrieve_contents (abfd, sec, link_info->keep_memory);
7155 if (contents == NULL && sec_size != 0)
7161 /* Record relocations against relaxable literal sections. */
7162 for (i = 0; i < sec->reloc_count; i++)
7164 Elf_Internal_Rela *irel = &internal_relocs[i];
7166 asection *target_sec;
7167 xtensa_relax_info *target_relax_info;
7169 r_reloc_init (&r_rel, abfd, irel, contents, sec_size);
7171 target_sec = r_reloc_get_section (&r_rel);
7172 target_relax_info = get_xtensa_relax_info (target_sec);
7174 if (target_relax_info
7175 && (target_relax_info->is_relaxable_literal_section
7176 || target_relax_info->is_relaxable_asm_section))
7178 xtensa_opcode opcode = XTENSA_UNDEFINED;
7180 bfd_boolean is_abs_literal = FALSE;
7182 if (is_alt_relocation (ELF32_R_TYPE (irel->r_info)))
7184 /* None of the current alternate relocs are PC-relative,
7185 and only PC-relative relocs matter here. However, we
7186 still need to record the opcode for literal
7188 opcode = get_relocation_opcode (abfd, sec, contents, irel);
7189 if (opcode == get_l32r_opcode ())
7191 is_abs_literal = TRUE;
7195 opcode = XTENSA_UNDEFINED;
7197 else if (is_operand_relocation (ELF32_R_TYPE (irel->r_info)))
7199 opcode = get_relocation_opcode (abfd, sec, contents, irel);
7200 opnd = get_relocation_opnd (opcode, ELF32_R_TYPE (irel->r_info));
7203 if (opcode != XTENSA_UNDEFINED)
7205 int src_next = target_relax_info->src_next++;
7206 source_reloc *s_reloc = &target_relax_info->src_relocs[src_next];
7208 init_source_reloc (s_reloc, sec, &r_rel, opcode, opnd,
7214 /* Now get rid of ASM_EXPAND relocations. At this point, the
7215 src_relocs array for the target literal section may still be
7216 incomplete, but it must at least contain the entries for the L32R
7217 relocations associated with ASM_EXPANDs because they were just
7218 added in the preceding loop over the relocations. */
7220 for (i = 0; i < sec->reloc_count; i++)
7222 Elf_Internal_Rela *irel = &internal_relocs[i];
7223 bfd_boolean is_reachable;
7225 if (!is_resolvable_asm_expansion (abfd, sec, contents, irel, link_info,
7231 Elf_Internal_Rela *l32r_irel;
7233 asection *target_sec;
7234 xtensa_relax_info *target_relax_info;
7236 /* Mark the source_reloc for the L32R so that it will be
7237 removed in compute_removed_literals(), along with the
7238 associated literal. */
7239 l32r_irel = find_associated_l32r_irel (abfd, sec, contents,
7240 irel, internal_relocs);
7241 if (l32r_irel == NULL)
7244 r_reloc_init (&r_rel, abfd, l32r_irel, contents, sec_size);
7246 target_sec = r_reloc_get_section (&r_rel);
7247 target_relax_info = get_xtensa_relax_info (target_sec);
7249 if (target_relax_info
7250 && (target_relax_info->is_relaxable_literal_section
7251 || target_relax_info->is_relaxable_asm_section))
7253 source_reloc *s_reloc;
7255 /* Search the source_relocs for the entry corresponding to
7256 the l32r_irel. Note: The src_relocs array is not yet
7257 sorted, but it wouldn't matter anyway because we're
7258 searching by source offset instead of target offset. */
7259 s_reloc = find_source_reloc (target_relax_info->src_relocs,
7260 target_relax_info->src_next,
7262 BFD_ASSERT (s_reloc);
7263 s_reloc->is_null = TRUE;
7266 /* Convert this reloc to ASM_SIMPLIFY. */
7267 irel->r_info = ELF32_R_INFO (ELF32_R_SYM (irel->r_info),
7268 R_XTENSA_ASM_SIMPLIFY);
7269 l32r_irel->r_info = ELF32_R_INFO (0, R_XTENSA_NONE);
7271 pin_internal_relocs (sec, internal_relocs);
7275 /* It is resolvable but doesn't reach. We resolve now
7276 by eliminating the relocation -- the call will remain
7277 expanded into L32R/CALLX. */
7278 irel->r_info = ELF32_R_INFO (0, R_XTENSA_NONE);
7279 pin_internal_relocs (sec, internal_relocs);
7284 release_contents (sec, contents);
7285 release_internal_relocs (sec, internal_relocs);
7290 /* Return TRUE if the asm expansion can be resolved. Generally it can
7291 be resolved on a final link or when a partial link locates it in the
7292 same section as the target. Set "is_reachable" flag if the target of
7293 the call is within the range of a direct call, given the current VMA
7294 for this section and the target section. */
7297 is_resolvable_asm_expansion (bfd *abfd,
7300 Elf_Internal_Rela *irel,
7301 struct bfd_link_info *link_info,
7302 bfd_boolean *is_reachable_p)
7304 asection *target_sec;
7305 bfd_vma target_offset;
7307 xtensa_opcode opcode, direct_call_opcode;
7308 bfd_vma self_address;
7309 bfd_vma dest_address;
7310 bfd_boolean uses_l32r;
7311 bfd_size_type sec_size;
7313 *is_reachable_p = FALSE;
7315 if (contents == NULL)
7318 if (ELF32_R_TYPE (irel->r_info) != R_XTENSA_ASM_EXPAND)
7321 sec_size = bfd_get_section_limit (abfd, sec);
7322 opcode = get_expanded_call_opcode (contents + irel->r_offset,
7323 sec_size - irel->r_offset, &uses_l32r);
7324 /* Optimization of longcalls that use CONST16 is not yet implemented. */
7328 direct_call_opcode = swap_callx_for_call_opcode (opcode);
7329 if (direct_call_opcode == XTENSA_UNDEFINED)
7332 /* Check and see that the target resolves. */
7333 r_reloc_init (&r_rel, abfd, irel, contents, sec_size);
7334 if (!r_reloc_is_defined (&r_rel))
7337 target_sec = r_reloc_get_section (&r_rel);
7338 target_offset = r_rel.target_offset;
7340 /* If the target is in a shared library, then it doesn't reach. This
7341 isn't supposed to come up because the compiler should never generate
7342 non-PIC calls on systems that use shared libraries, but the linker
7343 shouldn't crash regardless. */
7344 if (!target_sec->output_section)
7347 /* For relocatable sections, we can only simplify when the output
7348 section of the target is the same as the output section of the
7350 if (bfd_link_relocatable (link_info)
7351 && (target_sec->output_section != sec->output_section
7352 || is_reloc_sym_weak (abfd, irel)))
7355 if (target_sec->output_section != sec->output_section)
7357 /* If the two sections are sufficiently far away that relaxation
7358 might take the call out of range, we can't simplify. For
7359 example, a positive displacement call into another memory
7360 could get moved to a lower address due to literal removal,
7361 but the destination won't move, and so the displacment might
7364 If the displacement is negative, assume the destination could
7365 move as far back as the start of the output section. The
7366 self_address will be at least as far into the output section
7367 as it is prior to relaxation.
7369 If the displacement is postive, assume the destination will be in
7370 it's pre-relaxed location (because relaxation only makes sections
7371 smaller). The self_address could go all the way to the beginning
7372 of the output section. */
7374 dest_address = target_sec->output_section->vma;
7375 self_address = sec->output_section->vma;
7377 if (sec->output_section->vma > target_sec->output_section->vma)
7378 self_address += sec->output_offset + irel->r_offset + 3;
7380 dest_address += bfd_get_section_limit (abfd, target_sec->output_section);
7381 /* Call targets should be four-byte aligned. */
7382 dest_address = (dest_address + 3) & ~3;
7387 self_address = (sec->output_section->vma
7388 + sec->output_offset + irel->r_offset + 3);
7389 dest_address = (target_sec->output_section->vma
7390 + target_sec->output_offset + target_offset);
7393 *is_reachable_p = pcrel_reloc_fits (direct_call_opcode, 0,
7394 self_address, dest_address);
7396 if ((self_address >> CALL_SEGMENT_BITS) !=
7397 (dest_address >> CALL_SEGMENT_BITS))
7404 static Elf_Internal_Rela *
7405 find_associated_l32r_irel (bfd *abfd,
7408 Elf_Internal_Rela *other_irel,
7409 Elf_Internal_Rela *internal_relocs)
7413 for (i = 0; i < sec->reloc_count; i++)
7415 Elf_Internal_Rela *irel = &internal_relocs[i];
7417 if (irel == other_irel)
7419 if (irel->r_offset != other_irel->r_offset)
7421 if (is_l32r_relocation (abfd, sec, contents, irel))
7429 static xtensa_opcode *
7430 build_reloc_opcodes (bfd *abfd,
7433 Elf_Internal_Rela *internal_relocs)
7436 xtensa_opcode *reloc_opcodes =
7437 (xtensa_opcode *) bfd_malloc (sizeof (xtensa_opcode) * sec->reloc_count);
7438 for (i = 0; i < sec->reloc_count; i++)
7440 Elf_Internal_Rela *irel = &internal_relocs[i];
7441 reloc_opcodes[i] = get_relocation_opcode (abfd, sec, contents, irel);
7443 return reloc_opcodes;
7446 struct reloc_range_struct
7449 bfd_boolean add; /* TRUE if start of a range, FALSE otherwise. */
7450 /* Original irel index in the array of relocations for a section. */
7451 unsigned irel_index;
7453 typedef struct reloc_range_struct reloc_range;
7455 typedef struct reloc_range_list_entry_struct reloc_range_list_entry;
7456 struct reloc_range_list_entry_struct
7458 reloc_range_list_entry *next;
7459 reloc_range_list_entry *prev;
7460 Elf_Internal_Rela *irel;
7461 xtensa_opcode opcode;
7465 struct reloc_range_list_struct
7467 /* The rest of the structure is only meaningful when ok is TRUE. */
7470 unsigned n_range; /* Number of range markers. */
7471 reloc_range *range; /* Sorted range markers. */
7473 unsigned first; /* Index of a first range element in the list. */
7474 unsigned last; /* One past index of a last range element in the list. */
7476 unsigned n_list; /* Number of list elements. */
7477 reloc_range_list_entry *reloc; /* */
7478 reloc_range_list_entry list_root;
7482 reloc_range_compare (const void *a, const void *b)
7484 const reloc_range *ra = a;
7485 const reloc_range *rb = b;
7487 if (ra->addr != rb->addr)
7488 return ra->addr < rb->addr ? -1 : 1;
7489 if (ra->add != rb->add)
7490 return ra->add ? -1 : 1;
7495 build_reloc_ranges (bfd *abfd, asection *sec,
7497 Elf_Internal_Rela *internal_relocs,
7498 xtensa_opcode *reloc_opcodes,
7499 reloc_range_list *list)
7504 reloc_range *ranges = NULL;
7505 reloc_range_list_entry *reloc =
7506 bfd_malloc (sec->reloc_count * sizeof (*reloc));
7508 memset (list, 0, sizeof (*list));
7511 for (i = 0; i < sec->reloc_count; i++)
7513 Elf_Internal_Rela *irel = &internal_relocs[i];
7514 int r_type = ELF32_R_TYPE (irel->r_info);
7515 reloc_howto_type *howto = &elf_howto_table[r_type];
7518 if (r_type == R_XTENSA_ASM_SIMPLIFY
7519 || r_type == R_XTENSA_32_PCREL
7520 || !howto->pc_relative)
7523 r_reloc_init (&r_rel, abfd, irel, contents,
7524 bfd_get_section_limit (abfd, sec));
7526 if (r_reloc_get_section (&r_rel) != sec)
7531 max_n = (max_n + 2) * 2;
7532 ranges = bfd_realloc (ranges, max_n * sizeof (*ranges));
7535 ranges[n].addr = irel->r_offset;
7536 ranges[n + 1].addr = r_rel.target_offset;
7538 ranges[n].add = ranges[n].addr < ranges[n + 1].addr;
7539 ranges[n + 1].add = !ranges[n].add;
7541 ranges[n].irel_index = i;
7542 ranges[n + 1].irel_index = i;
7546 reloc[i].irel = irel;
7548 /* Every relocation won't possibly be checked in the optimized version of
7549 check_section_ebb_pcrels_fit, so this needs to be done here. */
7550 if (is_alt_relocation (ELF32_R_TYPE (irel->r_info)))
7552 /* None of the current alternate relocs are PC-relative,
7553 and only PC-relative relocs matter here. */
7557 xtensa_opcode opcode;
7561 opcode = reloc_opcodes[i];
7563 opcode = get_relocation_opcode (abfd, sec, contents, irel);
7565 if (opcode == XTENSA_UNDEFINED)
7571 opnum = get_relocation_opnd (opcode, ELF32_R_TYPE (irel->r_info));
7572 if (opnum == XTENSA_UNDEFINED)
7578 /* Record relocation opcode and opnum as we've calculated them
7579 anyway and they won't change. */
7580 reloc[i].opcode = opcode;
7581 reloc[i].opnum = opnum;
7587 ranges = bfd_realloc (ranges, n * sizeof (*ranges));
7588 qsort (ranges, n, sizeof (*ranges), reloc_range_compare);
7591 list->range = ranges;
7592 list->reloc = reloc;
7593 list->list_root.prev = &list->list_root;
7594 list->list_root.next = &list->list_root;
7603 static void reloc_range_list_append (reloc_range_list *list,
7604 unsigned irel_index)
7606 reloc_range_list_entry *entry = list->reloc + irel_index;
7608 entry->prev = list->list_root.prev;
7609 entry->next = &list->list_root;
7610 entry->prev->next = entry;
7611 entry->next->prev = entry;
7615 static void reloc_range_list_remove (reloc_range_list *list,
7616 unsigned irel_index)
7618 reloc_range_list_entry *entry = list->reloc + irel_index;
7620 entry->next->prev = entry->prev;
7621 entry->prev->next = entry->next;
7625 /* Update relocation list object so that it lists all relocations that cross
7626 [first; last] range. Range bounds should not decrease with successive
7628 static void reloc_range_list_update_range (reloc_range_list *list,
7629 bfd_vma first, bfd_vma last)
7631 /* This should not happen: EBBs are iterated from lower addresses to higher.
7632 But even if that happens there's no need to break: just flush current list
7633 and start from scratch. */
7634 if ((list->last > 0 && list->range[list->last - 1].addr > last) ||
7635 (list->first > 0 && list->range[list->first - 1].addr >= first))
7640 list->list_root.next = &list->list_root;
7641 list->list_root.prev = &list->list_root;
7642 fprintf (stderr, "%s: move backwards requested\n", __func__);
7645 for (; list->last < list->n_range &&
7646 list->range[list->last].addr <= last; ++list->last)
7647 if (list->range[list->last].add)
7648 reloc_range_list_append (list, list->range[list->last].irel_index);
7650 for (; list->first < list->n_range &&
7651 list->range[list->first].addr < first; ++list->first)
7652 if (!list->range[list->first].add)
7653 reloc_range_list_remove (list, list->range[list->first].irel_index);
7656 static void free_reloc_range_list (reloc_range_list *list)
7662 /* The compute_text_actions function will build a list of potential
7663 transformation actions for code in the extended basic block of each
7664 longcall that is optimized to a direct call. From this list we
7665 generate a set of actions to actually perform that optimizes for
7666 space and, if not using size_opt, maintains branch target
7669 These actions to be performed are placed on a per-section list.
7670 The actual changes are performed by relax_section() in the second
7674 compute_text_actions (bfd *abfd,
7676 struct bfd_link_info *link_info)
7678 xtensa_opcode *reloc_opcodes = NULL;
7679 xtensa_relax_info *relax_info;
7681 Elf_Internal_Rela *internal_relocs;
7682 bfd_boolean ok = TRUE;
7684 property_table_entry *prop_table = 0;
7686 bfd_size_type sec_size;
7687 reloc_range_list relevant_relocs;
7689 relax_info = get_xtensa_relax_info (sec);
7690 BFD_ASSERT (relax_info);
7691 BFD_ASSERT (relax_info->src_next == relax_info->src_count);
7693 /* Do nothing if the section contains no optimized longcalls. */
7694 if (!relax_info->is_relaxable_asm_section)
7697 internal_relocs = retrieve_internal_relocs (abfd, sec,
7698 link_info->keep_memory);
7700 if (internal_relocs)
7701 qsort (internal_relocs, sec->reloc_count, sizeof (Elf_Internal_Rela),
7702 internal_reloc_compare);
7704 sec_size = bfd_get_section_limit (abfd, sec);
7705 contents = retrieve_contents (abfd, sec, link_info->keep_memory);
7706 if (contents == NULL && sec_size != 0)
7712 ptblsize = xtensa_read_table_entries (abfd, sec, &prop_table,
7713 XTENSA_PROP_SEC_NAME, FALSE);
7720 /* Precompute the opcode for each relocation. */
7721 reloc_opcodes = build_reloc_opcodes (abfd, sec, contents, internal_relocs);
7723 build_reloc_ranges (abfd, sec, contents, internal_relocs, reloc_opcodes,
7726 for (i = 0; i < sec->reloc_count; i++)
7728 Elf_Internal_Rela *irel = &internal_relocs[i];
7730 property_table_entry *the_entry;
7733 ebb_constraint ebb_table;
7734 bfd_size_type simplify_size;
7736 if (irel && ELF32_R_TYPE (irel->r_info) != R_XTENSA_ASM_SIMPLIFY)
7738 r_offset = irel->r_offset;
7740 simplify_size = get_asm_simplify_size (contents, sec_size, r_offset);
7741 if (simplify_size == 0)
7744 /* xgettext:c-format */
7745 (_("%B(%A+%#Lx): could not decode instruction for "
7746 "XTENSA_ASM_SIMPLIFY relocation; "
7747 "possible configuration mismatch"),
7748 sec->owner, sec, r_offset);
7752 /* If the instruction table is not around, then don't do this
7754 the_entry = elf_xtensa_find_property_entry (prop_table, ptblsize,
7755 sec->vma + irel->r_offset);
7756 if (the_entry == NULL || XTENSA_NO_NOP_REMOVAL)
7758 text_action_add (&relax_info->action_list,
7759 ta_convert_longcall, sec, r_offset,
7764 /* If the next longcall happens to be at the same address as an
7765 unreachable section of size 0, then skip forward. */
7766 ptbl_idx = the_entry - prop_table;
7767 while ((the_entry->flags & XTENSA_PROP_UNREACHABLE)
7768 && the_entry->size == 0
7769 && ptbl_idx + 1 < ptblsize
7770 && (prop_table[ptbl_idx + 1].address
7771 == prop_table[ptbl_idx].address))
7777 if (the_entry->flags & XTENSA_PROP_NO_TRANSFORM)
7778 /* NO_REORDER is OK */
7781 init_ebb_constraint (&ebb_table);
7782 ebb = &ebb_table.ebb;
7783 init_ebb (ebb, sec, contents, sec_size, prop_table, ptblsize,
7784 internal_relocs, sec->reloc_count);
7785 ebb->start_offset = r_offset + simplify_size;
7786 ebb->end_offset = r_offset + simplify_size;
7787 ebb->start_ptbl_idx = ptbl_idx;
7788 ebb->end_ptbl_idx = ptbl_idx;
7789 ebb->start_reloc_idx = i;
7790 ebb->end_reloc_idx = i;
7792 if (!extend_ebb_bounds (ebb)
7793 || !compute_ebb_proposed_actions (&ebb_table)
7794 || !compute_ebb_actions (&ebb_table)
7795 || !check_section_ebb_pcrels_fit (abfd, sec, contents,
7798 &ebb_table, reloc_opcodes)
7799 || !check_section_ebb_reduces (&ebb_table))
7801 /* If anything goes wrong or we get unlucky and something does
7802 not fit, with our plan because of expansion between
7803 critical branches, just convert to a NOP. */
7805 text_action_add (&relax_info->action_list,
7806 ta_convert_longcall, sec, r_offset, 0);
7807 i = ebb_table.ebb.end_reloc_idx;
7808 free_ebb_constraint (&ebb_table);
7812 text_action_add_proposed (&relax_info->action_list, &ebb_table, sec);
7814 /* Update the index so we do not go looking at the relocations
7815 we have already processed. */
7816 i = ebb_table.ebb.end_reloc_idx;
7817 free_ebb_constraint (&ebb_table);
7820 free_reloc_range_list (&relevant_relocs);
7823 if (action_list_count (&relax_info->action_list))
7824 print_action_list (stderr, &relax_info->action_list);
7828 release_contents (sec, contents);
7829 release_internal_relocs (sec, internal_relocs);
7833 free (reloc_opcodes);
7839 /* Do not widen an instruction if it is preceeded by a
7840 loop opcode. It might cause misalignment. */
7843 prev_instr_is_a_loop (bfd_byte *contents,
7844 bfd_size_type content_length,
7845 bfd_size_type offset)
7847 xtensa_opcode prev_opcode;
7851 prev_opcode = insn_decode_opcode (contents, content_length, offset-3, 0);
7852 return (xtensa_opcode_is_loop (xtensa_default_isa, prev_opcode) == 1);
7856 /* Find all of the possible actions for an extended basic block. */
7859 compute_ebb_proposed_actions (ebb_constraint *ebb_table)
7861 const ebb_t *ebb = &ebb_table->ebb;
7862 unsigned rel_idx = ebb->start_reloc_idx;
7863 property_table_entry *entry, *start_entry, *end_entry;
7865 xtensa_isa isa = xtensa_default_isa;
7867 static xtensa_insnbuf insnbuf = NULL;
7868 static xtensa_insnbuf slotbuf = NULL;
7870 if (insnbuf == NULL)
7872 insnbuf = xtensa_insnbuf_alloc (isa);
7873 slotbuf = xtensa_insnbuf_alloc (isa);
7876 start_entry = &ebb->ptbl[ebb->start_ptbl_idx];
7877 end_entry = &ebb->ptbl[ebb->end_ptbl_idx];
7879 for (entry = start_entry; entry <= end_entry; entry++)
7881 bfd_vma start_offset, end_offset;
7882 bfd_size_type insn_len;
7884 start_offset = entry->address - ebb->sec->vma;
7885 end_offset = entry->address + entry->size - ebb->sec->vma;
7887 if (entry == start_entry)
7888 start_offset = ebb->start_offset;
7889 if (entry == end_entry)
7890 end_offset = ebb->end_offset;
7891 offset = start_offset;
7893 if (offset == entry->address - ebb->sec->vma
7894 && (entry->flags & XTENSA_PROP_INSN_BRANCH_TARGET) != 0)
7896 enum ebb_target_enum align_type = EBB_DESIRE_TGT_ALIGN;
7897 BFD_ASSERT (offset != end_offset);
7898 if (offset == end_offset)
7901 insn_len = insn_decode_len (ebb->contents, ebb->content_length,
7906 if (check_branch_target_aligned_address (offset, insn_len))
7907 align_type = EBB_REQUIRE_TGT_ALIGN;
7909 ebb_propose_action (ebb_table, align_type, 0,
7910 ta_none, offset, 0, TRUE);
7913 while (offset != end_offset)
7915 Elf_Internal_Rela *irel;
7916 xtensa_opcode opcode;
7918 while (rel_idx < ebb->end_reloc_idx
7919 && (ebb->relocs[rel_idx].r_offset < offset
7920 || (ebb->relocs[rel_idx].r_offset == offset
7921 && (ELF32_R_TYPE (ebb->relocs[rel_idx].r_info)
7922 != R_XTENSA_ASM_SIMPLIFY))))
7925 /* Check for longcall. */
7926 irel = &ebb->relocs[rel_idx];
7927 if (irel->r_offset == offset
7928 && ELF32_R_TYPE (irel->r_info) == R_XTENSA_ASM_SIMPLIFY)
7930 bfd_size_type simplify_size;
7932 simplify_size = get_asm_simplify_size (ebb->contents,
7933 ebb->content_length,
7935 if (simplify_size == 0)
7938 ebb_propose_action (ebb_table, EBB_NO_ALIGN, 0,
7939 ta_convert_longcall, offset, 0, TRUE);
7941 offset += simplify_size;
7945 if (offset + MIN_INSN_LENGTH > ebb->content_length)
7947 xtensa_insnbuf_from_chars (isa, insnbuf, &ebb->contents[offset],
7948 ebb->content_length - offset);
7949 fmt = xtensa_format_decode (isa, insnbuf);
7950 if (fmt == XTENSA_UNDEFINED)
7952 insn_len = xtensa_format_length (isa, fmt);
7953 if (insn_len == (bfd_size_type) XTENSA_UNDEFINED)
7956 if (xtensa_format_num_slots (isa, fmt) != 1)
7962 xtensa_format_get_slot (isa, fmt, 0, insnbuf, slotbuf);
7963 opcode = xtensa_opcode_decode (isa, fmt, 0, slotbuf);
7964 if (opcode == XTENSA_UNDEFINED)
7967 if ((entry->flags & XTENSA_PROP_INSN_NO_DENSITY) == 0
7968 && (entry->flags & XTENSA_PROP_NO_TRANSFORM) == 0
7969 && can_narrow_instruction (slotbuf, fmt, opcode) != 0)
7971 /* Add an instruction narrow action. */
7972 ebb_propose_action (ebb_table, EBB_NO_ALIGN, 0,
7973 ta_narrow_insn, offset, 0, FALSE);
7975 else if ((entry->flags & XTENSA_PROP_NO_TRANSFORM) == 0
7976 && can_widen_instruction (slotbuf, fmt, opcode) != 0
7977 && ! prev_instr_is_a_loop (ebb->contents,
7978 ebb->content_length, offset))
7980 /* Add an instruction widen action. */
7981 ebb_propose_action (ebb_table, EBB_NO_ALIGN, 0,
7982 ta_widen_insn, offset, 0, FALSE);
7984 else if (xtensa_opcode_is_loop (xtensa_default_isa, opcode) == 1)
7986 /* Check for branch targets. */
7987 ebb_propose_action (ebb_table, EBB_REQUIRE_LOOP_ALIGN, 0,
7988 ta_none, offset, 0, TRUE);
7995 if (ebb->ends_unreachable)
7997 ebb_propose_action (ebb_table, EBB_NO_ALIGN, 0,
7998 ta_fill, ebb->end_offset, 0, TRUE);
8005 /* xgettext:c-format */
8006 (_("%B(%A+%#Lx): could not decode instruction; "
8007 "possible configuration mismatch"),
8008 ebb->sec->owner, ebb->sec, offset);
8013 /* After all of the information has collected about the
8014 transformations possible in an EBB, compute the appropriate actions
8015 here in compute_ebb_actions. We still must check later to make
8016 sure that the actions do not break any relocations. The algorithm
8017 used here is pretty greedy. Basically, it removes as many no-ops
8018 as possible so that the end of the EBB has the same alignment
8019 characteristics as the original. First, it uses narrowing, then
8020 fill space at the end of the EBB, and finally widenings. If that
8021 does not work, it tries again with one fewer no-op removed. The
8022 optimization will only be performed if all of the branch targets
8023 that were aligned before transformation are also aligned after the
8026 When the size_opt flag is set, ignore the branch target alignments,
8027 narrow all wide instructions, and remove all no-ops unless the end
8028 of the EBB prevents it. */
8031 compute_ebb_actions (ebb_constraint *ebb_table)
8035 int removed_bytes = 0;
8036 ebb_t *ebb = &ebb_table->ebb;
8037 unsigned seg_idx_start = 0;
8038 unsigned seg_idx_end = 0;
8040 /* We perform this like the assembler relaxation algorithm: Start by
8041 assuming all instructions are narrow and all no-ops removed; then
8044 /* For each segment of this that has a solid constraint, check to
8045 see if there are any combinations that will keep the constraint.
8047 for (seg_idx_end = 0; seg_idx_end < ebb_table->action_count; seg_idx_end++)
8049 bfd_boolean requires_text_end_align = FALSE;
8050 unsigned longcall_count = 0;
8051 unsigned longcall_convert_count = 0;
8052 unsigned narrowable_count = 0;
8053 unsigned narrowable_convert_count = 0;
8054 unsigned widenable_count = 0;
8055 unsigned widenable_convert_count = 0;
8057 proposed_action *action = NULL;
8058 int align = (1 << ebb_table->ebb.sec->alignment_power);
8060 seg_idx_start = seg_idx_end;
8062 for (i = seg_idx_start; i < ebb_table->action_count; i++)
8064 action = &ebb_table->actions[i];
8065 if (action->action == ta_convert_longcall)
8067 if (action->action == ta_narrow_insn)
8069 if (action->action == ta_widen_insn)
8071 if (action->action == ta_fill)
8073 if (action->align_type == EBB_REQUIRE_LOOP_ALIGN)
8075 if (action->align_type == EBB_REQUIRE_TGT_ALIGN
8076 && !elf32xtensa_size_opt)
8081 if (seg_idx_end == ebb_table->action_count && !ebb->ends_unreachable)
8082 requires_text_end_align = TRUE;
8084 if (elf32xtensa_size_opt && !requires_text_end_align
8085 && action->align_type != EBB_REQUIRE_LOOP_ALIGN
8086 && action->align_type != EBB_REQUIRE_TGT_ALIGN)
8088 longcall_convert_count = longcall_count;
8089 narrowable_convert_count = narrowable_count;
8090 widenable_convert_count = 0;
8094 /* There is a constraint. Convert the max number of longcalls. */
8095 narrowable_convert_count = 0;
8096 longcall_convert_count = 0;
8097 widenable_convert_count = 0;
8099 for (j = 0; j < longcall_count; j++)
8101 int removed = (longcall_count - j) * 3 & (align - 1);
8102 unsigned desire_narrow = (align - removed) & (align - 1);
8103 unsigned desire_widen = removed;
8104 if (desire_narrow <= narrowable_count)
8106 narrowable_convert_count = desire_narrow;
8107 narrowable_convert_count +=
8108 (align * ((narrowable_count - narrowable_convert_count)
8110 longcall_convert_count = (longcall_count - j);
8111 widenable_convert_count = 0;
8114 if (desire_widen <= widenable_count && !elf32xtensa_size_opt)
8116 narrowable_convert_count = 0;
8117 longcall_convert_count = longcall_count - j;
8118 widenable_convert_count = desire_widen;
8124 /* Now the number of conversions are saved. Do them. */
8125 for (i = seg_idx_start; i < seg_idx_end; i++)
8127 action = &ebb_table->actions[i];
8128 switch (action->action)
8130 case ta_convert_longcall:
8131 if (longcall_convert_count != 0)
8133 action->action = ta_remove_longcall;
8134 action->do_action = TRUE;
8135 action->removed_bytes += 3;
8136 longcall_convert_count--;
8139 case ta_narrow_insn:
8140 if (narrowable_convert_count != 0)
8142 action->do_action = TRUE;
8143 action->removed_bytes += 1;
8144 narrowable_convert_count--;
8148 if (widenable_convert_count != 0)
8150 action->do_action = TRUE;
8151 action->removed_bytes -= 1;
8152 widenable_convert_count--;
8161 /* Now we move on to some local opts. Try to remove each of the
8162 remaining longcalls. */
8164 if (ebb_table->ebb.ends_section || ebb_table->ebb.ends_unreachable)
8167 for (i = 0; i < ebb_table->action_count; i++)
8169 int old_removed_bytes = removed_bytes;
8170 proposed_action *action = &ebb_table->actions[i];
8172 if (action->do_action && action->action == ta_convert_longcall)
8174 bfd_boolean bad_alignment = FALSE;
8176 for (j = i + 1; j < ebb_table->action_count; j++)
8178 proposed_action *new_action = &ebb_table->actions[j];
8179 bfd_vma offset = new_action->offset;
8180 if (new_action->align_type == EBB_REQUIRE_TGT_ALIGN)
8182 if (!check_branch_target_aligned
8183 (ebb_table->ebb.contents,
8184 ebb_table->ebb.content_length,
8185 offset, offset - removed_bytes))
8187 bad_alignment = TRUE;
8191 if (new_action->align_type == EBB_REQUIRE_LOOP_ALIGN)
8193 if (!check_loop_aligned (ebb_table->ebb.contents,
8194 ebb_table->ebb.content_length,
8196 offset - removed_bytes))
8198 bad_alignment = TRUE;
8202 if (new_action->action == ta_narrow_insn
8203 && !new_action->do_action
8204 && ebb_table->ebb.sec->alignment_power == 2)
8206 /* Narrow an instruction and we are done. */
8207 new_action->do_action = TRUE;
8208 new_action->removed_bytes += 1;
8209 bad_alignment = FALSE;
8212 if (new_action->action == ta_widen_insn
8213 && new_action->do_action
8214 && ebb_table->ebb.sec->alignment_power == 2)
8216 /* Narrow an instruction and we are done. */
8217 new_action->do_action = FALSE;
8218 new_action->removed_bytes += 1;
8219 bad_alignment = FALSE;
8222 if (new_action->do_action)
8223 removed_bytes += new_action->removed_bytes;
8227 action->removed_bytes += 3;
8228 action->action = ta_remove_longcall;
8229 action->do_action = TRUE;
8232 removed_bytes = old_removed_bytes;
8233 if (action->do_action)
8234 removed_bytes += action->removed_bytes;
8239 for (i = 0; i < ebb_table->action_count; ++i)
8241 proposed_action *action = &ebb_table->actions[i];
8242 if (action->do_action)
8243 removed_bytes += action->removed_bytes;
8246 if ((removed_bytes % (1 << ebb_table->ebb.sec->alignment_power)) != 0
8247 && ebb->ends_unreachable)
8249 proposed_action *action;
8253 BFD_ASSERT (ebb_table->action_count != 0);
8254 action = &ebb_table->actions[ebb_table->action_count - 1];
8255 BFD_ASSERT (action->action == ta_fill);
8256 BFD_ASSERT (ebb->ends_unreachable->flags & XTENSA_PROP_UNREACHABLE);
8258 extra_space = compute_fill_extra_space (ebb->ends_unreachable);
8259 br = action->removed_bytes + removed_bytes + extra_space;
8260 br = br & ((1 << ebb->sec->alignment_power ) - 1);
8262 action->removed_bytes = extra_space - br;
8268 /* The xlate_map is a sorted array of address mappings designed to
8269 answer the offset_with_removed_text() query with a binary search instead
8270 of a linear search through the section's action_list. */
8272 typedef struct xlate_map_entry xlate_map_entry_t;
8273 typedef struct xlate_map xlate_map_t;
8275 struct xlate_map_entry
8277 unsigned orig_address;
8278 unsigned new_address;
8284 unsigned entry_count;
8285 xlate_map_entry_t *entry;
8290 xlate_compare (const void *a_v, const void *b_v)
8292 const xlate_map_entry_t *a = (const xlate_map_entry_t *) a_v;
8293 const xlate_map_entry_t *b = (const xlate_map_entry_t *) b_v;
8294 if (a->orig_address < b->orig_address)
8296 if (a->orig_address > (b->orig_address + b->size - 1))
8303 xlate_offset_with_removed_text (const xlate_map_t *map,
8304 text_action_list *action_list,
8308 xlate_map_entry_t *e;
8311 return offset_with_removed_text (action_list, offset);
8313 if (map->entry_count == 0)
8316 r = bsearch (&offset, map->entry, map->entry_count,
8317 sizeof (xlate_map_entry_t), &xlate_compare);
8318 e = (xlate_map_entry_t *) r;
8320 BFD_ASSERT (e != NULL);
8323 return e->new_address - e->orig_address + offset;
8326 typedef struct xlate_map_context_struct xlate_map_context;
8327 struct xlate_map_context_struct
8330 xlate_map_entry_t *current_entry;
8335 xlate_map_fn (splay_tree_node node, void *p)
8337 text_action *r = (text_action *)node->value;
8338 xlate_map_context *ctx = p;
8339 unsigned orig_size = 0;
8344 case ta_remove_insn:
8345 case ta_convert_longcall:
8346 case ta_remove_literal:
8347 case ta_add_literal:
8349 case ta_remove_longcall:
8352 case ta_narrow_insn:
8361 ctx->current_entry->size =
8362 r->offset + orig_size - ctx->current_entry->orig_address;
8363 if (ctx->current_entry->size != 0)
8365 ctx->current_entry++;
8366 ctx->map->entry_count++;
8368 ctx->current_entry->orig_address = r->offset + orig_size;
8369 ctx->removed += r->removed_bytes;
8370 ctx->current_entry->new_address = r->offset + orig_size - ctx->removed;
8371 ctx->current_entry->size = 0;
8375 /* Build a binary searchable offset translation map from a section's
8378 static xlate_map_t *
8379 build_xlate_map (asection *sec, xtensa_relax_info *relax_info)
8381 text_action_list *action_list = &relax_info->action_list;
8382 unsigned num_actions = 0;
8383 xlate_map_context ctx;
8385 ctx.map = (xlate_map_t *) bfd_malloc (sizeof (xlate_map_t));
8387 if (ctx.map == NULL)
8390 num_actions = action_list_count (action_list);
8391 ctx.map->entry = (xlate_map_entry_t *)
8392 bfd_malloc (sizeof (xlate_map_entry_t) * (num_actions + 1));
8393 if (ctx.map->entry == NULL)
8398 ctx.map->entry_count = 0;
8401 ctx.current_entry = &ctx.map->entry[0];
8403 ctx.current_entry->orig_address = 0;
8404 ctx.current_entry->new_address = 0;
8405 ctx.current_entry->size = 0;
8407 splay_tree_foreach (action_list->tree, xlate_map_fn, &ctx);
8409 ctx.current_entry->size = (bfd_get_section_limit (sec->owner, sec)
8410 - ctx.current_entry->orig_address);
8411 if (ctx.current_entry->size != 0)
8412 ctx.map->entry_count++;
8418 /* Free an offset translation map. */
8421 free_xlate_map (xlate_map_t *map)
8423 if (map && map->entry)
8430 /* Use check_section_ebb_pcrels_fit to make sure that all of the
8431 relocations in a section will fit if a proposed set of actions
8435 check_section_ebb_pcrels_fit (bfd *abfd,
8438 Elf_Internal_Rela *internal_relocs,
8439 reloc_range_list *relevant_relocs,
8440 const ebb_constraint *constraint,
8441 const xtensa_opcode *reloc_opcodes)
8444 unsigned n = sec->reloc_count;
8445 Elf_Internal_Rela *irel;
8446 xlate_map_t *xmap = NULL;
8447 bfd_boolean ok = TRUE;
8448 xtensa_relax_info *relax_info;
8449 reloc_range_list_entry *entry = NULL;
8451 relax_info = get_xtensa_relax_info (sec);
8453 if (relax_info && sec->reloc_count > 100)
8455 xmap = build_xlate_map (sec, relax_info);
8456 /* NULL indicates out of memory, but the slow version
8457 can still be used. */
8460 if (relevant_relocs && constraint->action_count)
8462 if (!relevant_relocs->ok)
8469 bfd_vma min_offset, max_offset;
8470 min_offset = max_offset = constraint->actions[0].offset;
8472 for (i = 1; i < constraint->action_count; ++i)
8474 proposed_action *action = &constraint->actions[i];
8475 bfd_vma offset = action->offset;
8477 if (offset < min_offset)
8478 min_offset = offset;
8479 if (offset > max_offset)
8480 max_offset = offset;
8482 reloc_range_list_update_range (relevant_relocs, min_offset,
8484 n = relevant_relocs->n_list;
8485 entry = &relevant_relocs->list_root;
8490 relevant_relocs = NULL;
8493 for (i = 0; i < n; i++)
8496 bfd_vma orig_self_offset, orig_target_offset;
8497 bfd_vma self_offset, target_offset;
8499 reloc_howto_type *howto;
8500 int self_removed_bytes, target_removed_bytes;
8502 if (relevant_relocs)
8504 entry = entry->next;
8509 irel = internal_relocs + i;
8511 r_type = ELF32_R_TYPE (irel->r_info);
8513 howto = &elf_howto_table[r_type];
8514 /* We maintain the required invariant: PC-relative relocations
8515 that fit before linking must fit after linking. Thus we only
8516 need to deal with relocations to the same section that are
8518 if (r_type == R_XTENSA_ASM_SIMPLIFY
8519 || r_type == R_XTENSA_32_PCREL
8520 || !howto->pc_relative)
8523 r_reloc_init (&r_rel, abfd, irel, contents,
8524 bfd_get_section_limit (abfd, sec));
8526 if (r_reloc_get_section (&r_rel) != sec)
8529 orig_self_offset = irel->r_offset;
8530 orig_target_offset = r_rel.target_offset;
8532 self_offset = orig_self_offset;
8533 target_offset = orig_target_offset;
8538 xlate_offset_with_removed_text (xmap, &relax_info->action_list,
8541 xlate_offset_with_removed_text (xmap, &relax_info->action_list,
8542 orig_target_offset);
8545 self_removed_bytes = 0;
8546 target_removed_bytes = 0;
8548 for (j = 0; j < constraint->action_count; ++j)
8550 proposed_action *action = &constraint->actions[j];
8551 bfd_vma offset = action->offset;
8552 int removed_bytes = action->removed_bytes;
8553 if (offset < orig_self_offset
8554 || (offset == orig_self_offset && action->action == ta_fill
8555 && action->removed_bytes < 0))
8556 self_removed_bytes += removed_bytes;
8557 if (offset < orig_target_offset
8558 || (offset == orig_target_offset && action->action == ta_fill
8559 && action->removed_bytes < 0))
8560 target_removed_bytes += removed_bytes;
8562 self_offset -= self_removed_bytes;
8563 target_offset -= target_removed_bytes;
8565 /* Try to encode it. Get the operand and check. */
8566 if (is_alt_relocation (ELF32_R_TYPE (irel->r_info)))
8568 /* None of the current alternate relocs are PC-relative,
8569 and only PC-relative relocs matter here. */
8573 xtensa_opcode opcode;
8576 if (relevant_relocs)
8578 opcode = entry->opcode;
8579 opnum = entry->opnum;
8584 opcode = reloc_opcodes[relevant_relocs ?
8585 (unsigned)(entry - relevant_relocs->reloc) : i];
8587 opcode = get_relocation_opcode (abfd, sec, contents, irel);
8588 if (opcode == XTENSA_UNDEFINED)
8594 opnum = get_relocation_opnd (opcode, ELF32_R_TYPE (irel->r_info));
8595 if (opnum == XTENSA_UNDEFINED)
8602 if (!pcrel_reloc_fits (opcode, opnum, self_offset, target_offset))
8611 free_xlate_map (xmap);
8618 check_section_ebb_reduces (const ebb_constraint *constraint)
8623 for (i = 0; i < constraint->action_count; i++)
8625 const proposed_action *action = &constraint->actions[i];
8626 if (action->do_action)
8627 removed += action->removed_bytes;
8637 text_action_add_proposed (text_action_list *l,
8638 const ebb_constraint *ebb_table,
8643 for (i = 0; i < ebb_table->action_count; i++)
8645 proposed_action *action = &ebb_table->actions[i];
8647 if (!action->do_action)
8649 switch (action->action)
8651 case ta_remove_insn:
8652 case ta_remove_longcall:
8653 case ta_convert_longcall:
8654 case ta_narrow_insn:
8657 case ta_remove_literal:
8658 text_action_add (l, action->action, sec, action->offset,
8659 action->removed_bytes);
8672 compute_fill_extra_space (property_table_entry *entry)
8674 int fill_extra_space;
8679 if ((entry->flags & XTENSA_PROP_UNREACHABLE) == 0)
8682 fill_extra_space = entry->size;
8683 if ((entry->flags & XTENSA_PROP_ALIGN) != 0)
8685 /* Fill bytes for alignment:
8686 (2**n)-1 - (addr + (2**n)-1) & (2**n -1) */
8687 int pow = GET_XTENSA_PROP_ALIGNMENT (entry->flags);
8688 int nsm = (1 << pow) - 1;
8689 bfd_vma addr = entry->address + entry->size;
8690 bfd_vma align_fill = nsm - ((addr + nsm) & nsm);
8691 fill_extra_space += align_fill;
8693 return fill_extra_space;
8697 /* First relaxation pass. */
8699 /* If the section contains relaxable literals, check each literal to
8700 see if it has the same value as another literal that has already
8701 been seen, either in the current section or a previous one. If so,
8702 add an entry to the per-section list of removed literals. The
8703 actual changes are deferred until the next pass. */
8706 compute_removed_literals (bfd *abfd,
8708 struct bfd_link_info *link_info,
8709 value_map_hash_table *values)
8711 xtensa_relax_info *relax_info;
8713 Elf_Internal_Rela *internal_relocs;
8714 source_reloc *src_relocs, *rel;
8715 bfd_boolean ok = TRUE;
8716 property_table_entry *prop_table = NULL;
8719 bfd_boolean last_loc_is_prev = FALSE;
8720 bfd_vma last_target_offset = 0;
8721 section_cache_t target_sec_cache;
8722 bfd_size_type sec_size;
8724 init_section_cache (&target_sec_cache);
8726 /* Do nothing if it is not a relaxable literal section. */
8727 relax_info = get_xtensa_relax_info (sec);
8728 BFD_ASSERT (relax_info);
8729 if (!relax_info->is_relaxable_literal_section)
8732 internal_relocs = retrieve_internal_relocs (abfd, sec,
8733 link_info->keep_memory);
8735 sec_size = bfd_get_section_limit (abfd, sec);
8736 contents = retrieve_contents (abfd, sec, link_info->keep_memory);
8737 if (contents == NULL && sec_size != 0)
8743 /* Sort the source_relocs by target offset. */
8744 src_relocs = relax_info->src_relocs;
8745 qsort (src_relocs, relax_info->src_count,
8746 sizeof (source_reloc), source_reloc_compare);
8747 qsort (internal_relocs, sec->reloc_count, sizeof (Elf_Internal_Rela),
8748 internal_reloc_compare);
8750 ptblsize = xtensa_read_table_entries (abfd, sec, &prop_table,
8751 XTENSA_PROP_SEC_NAME, FALSE);
8759 for (i = 0; i < relax_info->src_count; i++)
8761 Elf_Internal_Rela *irel = NULL;
8763 rel = &src_relocs[i];
8764 if (get_l32r_opcode () != rel->opcode)
8766 irel = get_irel_at_offset (sec, internal_relocs,
8767 rel->r_rel.target_offset);
8769 /* If the relocation on this is not a simple R_XTENSA_32 or
8770 R_XTENSA_PLT then do not consider it. This may happen when
8771 the difference of two symbols is used in a literal. */
8772 if (irel && (ELF32_R_TYPE (irel->r_info) != R_XTENSA_32
8773 && ELF32_R_TYPE (irel->r_info) != R_XTENSA_PLT))
8776 /* If the target_offset for this relocation is the same as the
8777 previous relocation, then we've already considered whether the
8778 literal can be coalesced. Skip to the next one.... */
8779 if (i != 0 && prev_i != -1
8780 && src_relocs[i-1].r_rel.target_offset == rel->r_rel.target_offset)
8784 if (last_loc_is_prev &&
8785 last_target_offset + 4 != rel->r_rel.target_offset)
8786 last_loc_is_prev = FALSE;
8788 /* Check if the relocation was from an L32R that is being removed
8789 because a CALLX was converted to a direct CALL, and check if
8790 there are no other relocations to the literal. */
8791 if (is_removable_literal (rel, i, src_relocs, relax_info->src_count,
8792 sec, prop_table, ptblsize))
8794 if (!remove_dead_literal (abfd, sec, link_info, internal_relocs,
8795 irel, rel, prop_table, ptblsize))
8800 last_target_offset = rel->r_rel.target_offset;
8804 if (!identify_literal_placement (abfd, sec, contents, link_info,
8806 &last_loc_is_prev, irel,
8807 relax_info->src_count - i, rel,
8808 prop_table, ptblsize,
8809 &target_sec_cache, rel->is_abs_literal))
8814 last_target_offset = rel->r_rel.target_offset;
8818 print_removed_literals (stderr, &relax_info->removed_list);
8819 print_action_list (stderr, &relax_info->action_list);
8825 free_section_cache (&target_sec_cache);
8827 release_contents (sec, contents);
8828 release_internal_relocs (sec, internal_relocs);
8833 static Elf_Internal_Rela *
8834 get_irel_at_offset (asection *sec,
8835 Elf_Internal_Rela *internal_relocs,
8839 Elf_Internal_Rela *irel;
8841 Elf_Internal_Rela key;
8843 if (!internal_relocs)
8846 key.r_offset = offset;
8847 irel = bsearch (&key, internal_relocs, sec->reloc_count,
8848 sizeof (Elf_Internal_Rela), internal_reloc_matches);
8852 /* bsearch does not guarantee which will be returned if there are
8853 multiple matches. We need the first that is not an alignment. */
8854 i = irel - internal_relocs;
8857 if (internal_relocs[i-1].r_offset != offset)
8861 for ( ; i < sec->reloc_count; i++)
8863 irel = &internal_relocs[i];
8864 r_type = ELF32_R_TYPE (irel->r_info);
8865 if (irel->r_offset == offset && r_type != R_XTENSA_NONE)
8874 is_removable_literal (const source_reloc *rel,
8876 const source_reloc *src_relocs,
8879 property_table_entry *prop_table,
8882 const source_reloc *curr_rel;
8883 property_table_entry *entry;
8888 entry = elf_xtensa_find_property_entry (prop_table, ptblsize,
8889 sec->vma + rel->r_rel.target_offset);
8890 if (entry && (entry->flags & XTENSA_PROP_NO_TRANSFORM))
8893 for (++i; i < src_count; ++i)
8895 curr_rel = &src_relocs[i];
8896 /* If all others have the same target offset.... */
8897 if (curr_rel->r_rel.target_offset != rel->r_rel.target_offset)
8900 if (!curr_rel->is_null
8901 && !xtensa_is_property_section (curr_rel->source_sec)
8902 && !(curr_rel->source_sec->flags & SEC_DEBUGGING))
8910 remove_dead_literal (bfd *abfd,
8912 struct bfd_link_info *link_info,
8913 Elf_Internal_Rela *internal_relocs,
8914 Elf_Internal_Rela *irel,
8916 property_table_entry *prop_table,
8919 property_table_entry *entry;
8920 xtensa_relax_info *relax_info;
8922 relax_info = get_xtensa_relax_info (sec);
8926 entry = elf_xtensa_find_property_entry (prop_table, ptblsize,
8927 sec->vma + rel->r_rel.target_offset);
8929 /* Mark the unused literal so that it will be removed. */
8930 add_removed_literal (&relax_info->removed_list, &rel->r_rel, NULL);
8932 text_action_add (&relax_info->action_list,
8933 ta_remove_literal, sec, rel->r_rel.target_offset, 4);
8935 /* If the section is 4-byte aligned, do not add fill. */
8936 if (sec->alignment_power > 2)
8938 int fill_extra_space;
8939 bfd_vma entry_sec_offset;
8941 property_table_entry *the_add_entry;
8945 entry_sec_offset = entry->address - sec->vma + entry->size;
8947 entry_sec_offset = rel->r_rel.target_offset + 4;
8949 /* If the literal range is at the end of the section,
8951 the_add_entry = elf_xtensa_find_property_entry (prop_table, ptblsize,
8953 fill_extra_space = compute_fill_extra_space (the_add_entry);
8955 fa = find_fill_action (&relax_info->action_list, sec, entry_sec_offset);
8956 removed_diff = compute_removed_action_diff (fa, sec, entry_sec_offset,
8957 -4, fill_extra_space);
8959 adjust_fill_action (fa, removed_diff);
8961 text_action_add (&relax_info->action_list,
8962 ta_fill, sec, entry_sec_offset, removed_diff);
8965 /* Zero out the relocation on this literal location. */
8968 if (elf_hash_table (link_info)->dynamic_sections_created)
8969 shrink_dynamic_reloc_sections (link_info, abfd, sec, irel);
8971 irel->r_info = ELF32_R_INFO (0, R_XTENSA_NONE);
8972 pin_internal_relocs (sec, internal_relocs);
8975 /* Do not modify "last_loc_is_prev". */
8981 identify_literal_placement (bfd *abfd,
8984 struct bfd_link_info *link_info,
8985 value_map_hash_table *values,
8986 bfd_boolean *last_loc_is_prev_p,
8987 Elf_Internal_Rela *irel,
8988 int remaining_src_rels,
8990 property_table_entry *prop_table,
8992 section_cache_t *target_sec_cache,
8993 bfd_boolean is_abs_literal)
8997 xtensa_relax_info *relax_info;
8998 bfd_boolean literal_placed = FALSE;
9000 unsigned long value;
9001 bfd_boolean final_static_link;
9002 bfd_size_type sec_size;
9004 relax_info = get_xtensa_relax_info (sec);
9008 sec_size = bfd_get_section_limit (abfd, sec);
9011 (!bfd_link_relocatable (link_info)
9012 && !elf_hash_table (link_info)->dynamic_sections_created);
9014 /* The placement algorithm first checks to see if the literal is
9015 already in the value map. If so and the value map is reachable
9016 from all uses, then the literal is moved to that location. If
9017 not, then we identify the last location where a fresh literal was
9018 placed. If the literal can be safely moved there, then we do so.
9019 If not, then we assume that the literal is not to move and leave
9020 the literal where it is, marking it as the last literal
9023 /* Find the literal value. */
9025 r_reloc_init (&r_rel, abfd, irel, contents, sec_size);
9028 BFD_ASSERT (rel->r_rel.target_offset < sec_size);
9029 value = bfd_get_32 (abfd, contents + rel->r_rel.target_offset);
9031 init_literal_value (&val, &r_rel, value, is_abs_literal);
9033 /* Check if we've seen another literal with the same value that
9034 is in the same output section. */
9035 val_map = value_map_get_cached_value (values, &val, final_static_link);
9038 && (r_reloc_get_section (&val_map->loc)->output_section
9039 == sec->output_section)
9040 && relocations_reach (rel, remaining_src_rels, &val_map->loc)
9041 && coalesce_shared_literal (sec, rel, prop_table, ptblsize, val_map))
9043 /* No change to last_loc_is_prev. */
9044 literal_placed = TRUE;
9047 /* For relocatable links, do not try to move literals. To do it
9048 correctly might increase the number of relocations in an input
9049 section making the default relocatable linking fail. */
9050 if (!bfd_link_relocatable (link_info) && !literal_placed
9051 && values->has_last_loc && !(*last_loc_is_prev_p))
9053 asection *target_sec = r_reloc_get_section (&values->last_loc);
9054 if (target_sec && target_sec->output_section == sec->output_section)
9056 /* Increment the virtual offset. */
9057 r_reloc try_loc = values->last_loc;
9058 try_loc.virtual_offset += 4;
9060 /* There is a last loc that was in the same output section. */
9061 if (relocations_reach (rel, remaining_src_rels, &try_loc)
9062 && move_shared_literal (sec, link_info, rel,
9063 prop_table, ptblsize,
9064 &try_loc, &val, target_sec_cache))
9066 values->last_loc.virtual_offset += 4;
9067 literal_placed = TRUE;
9069 val_map = add_value_map (values, &val, &try_loc,
9072 val_map->loc = try_loc;
9077 if (!literal_placed)
9079 /* Nothing worked, leave the literal alone but update the last loc. */
9080 values->has_last_loc = TRUE;
9081 values->last_loc = rel->r_rel;
9083 val_map = add_value_map (values, &val, &rel->r_rel, final_static_link);
9085 val_map->loc = rel->r_rel;
9086 *last_loc_is_prev_p = TRUE;
9093 /* Check if the original relocations (presumably on L32R instructions)
9094 identified by reloc[0..N] can be changed to reference the literal
9095 identified by r_rel. If r_rel is out of range for any of the
9096 original relocations, then we don't want to coalesce the original
9097 literal with the one at r_rel. We only check reloc[0..N], where the
9098 offsets are all the same as for reloc[0] (i.e., they're all
9099 referencing the same literal) and where N is also bounded by the
9100 number of remaining entries in the "reloc" array. The "reloc" array
9101 is sorted by target offset so we know all the entries for the same
9102 literal will be contiguous. */
9105 relocations_reach (source_reloc *reloc,
9106 int remaining_relocs,
9107 const r_reloc *r_rel)
9109 bfd_vma from_offset, source_address, dest_address;
9113 if (!r_reloc_is_defined (r_rel))
9116 sec = r_reloc_get_section (r_rel);
9117 from_offset = reloc[0].r_rel.target_offset;
9119 for (i = 0; i < remaining_relocs; i++)
9121 if (reloc[i].r_rel.target_offset != from_offset)
9124 /* Ignore relocations that have been removed. */
9125 if (reloc[i].is_null)
9128 /* The original and new output section for these must be the same
9129 in order to coalesce. */
9130 if (r_reloc_get_section (&reloc[i].r_rel)->output_section
9131 != sec->output_section)
9134 /* Absolute literals in the same output section can always be
9136 if (reloc[i].is_abs_literal)
9139 /* A literal with no PC-relative relocations can be moved anywhere. */
9140 if (reloc[i].opnd != -1)
9142 /* Otherwise, check to see that it fits. */
9143 source_address = (reloc[i].source_sec->output_section->vma
9144 + reloc[i].source_sec->output_offset
9145 + reloc[i].r_rel.rela.r_offset);
9146 dest_address = (sec->output_section->vma
9147 + sec->output_offset
9148 + r_rel->target_offset);
9150 if (!pcrel_reloc_fits (reloc[i].opcode, reloc[i].opnd,
9151 source_address, dest_address))
9160 /* Move a literal to another literal location because it is
9161 the same as the other literal value. */
9164 coalesce_shared_literal (asection *sec,
9166 property_table_entry *prop_table,
9170 property_table_entry *entry;
9172 property_table_entry *the_add_entry;
9174 xtensa_relax_info *relax_info;
9176 relax_info = get_xtensa_relax_info (sec);
9180 entry = elf_xtensa_find_property_entry
9181 (prop_table, ptblsize, sec->vma + rel->r_rel.target_offset);
9182 if (entry && (entry->flags & XTENSA_PROP_NO_TRANSFORM))
9185 /* Mark that the literal will be coalesced. */
9186 add_removed_literal (&relax_info->removed_list, &rel->r_rel, &val_map->loc);
9188 text_action_add (&relax_info->action_list,
9189 ta_remove_literal, sec, rel->r_rel.target_offset, 4);
9191 /* If the section is 4-byte aligned, do not add fill. */
9192 if (sec->alignment_power > 2)
9194 int fill_extra_space;
9195 bfd_vma entry_sec_offset;
9198 entry_sec_offset = entry->address - sec->vma + entry->size;
9200 entry_sec_offset = rel->r_rel.target_offset + 4;
9202 /* If the literal range is at the end of the section,
9204 fill_extra_space = 0;
9205 the_add_entry = elf_xtensa_find_property_entry (prop_table, ptblsize,
9207 if (the_add_entry && (the_add_entry->flags & XTENSA_PROP_UNREACHABLE))
9208 fill_extra_space = the_add_entry->size;
9210 fa = find_fill_action (&relax_info->action_list, sec, entry_sec_offset);
9211 removed_diff = compute_removed_action_diff (fa, sec, entry_sec_offset,
9212 -4, fill_extra_space);
9214 adjust_fill_action (fa, removed_diff);
9216 text_action_add (&relax_info->action_list,
9217 ta_fill, sec, entry_sec_offset, removed_diff);
9224 /* Move a literal to another location. This may actually increase the
9225 total amount of space used because of alignments so we need to do
9226 this carefully. Also, it may make a branch go out of range. */
9229 move_shared_literal (asection *sec,
9230 struct bfd_link_info *link_info,
9232 property_table_entry *prop_table,
9234 const r_reloc *target_loc,
9235 const literal_value *lit_value,
9236 section_cache_t *target_sec_cache)
9238 property_table_entry *the_add_entry, *src_entry, *target_entry = NULL;
9239 text_action *fa, *target_fa;
9241 xtensa_relax_info *relax_info, *target_relax_info;
9242 asection *target_sec;
9244 ebb_constraint ebb_table;
9245 bfd_boolean relocs_fit;
9247 /* If this routine always returns FALSE, the literals that cannot be
9248 coalesced will not be moved. */
9249 if (elf32xtensa_no_literal_movement)
9252 relax_info = get_xtensa_relax_info (sec);
9256 target_sec = r_reloc_get_section (target_loc);
9257 target_relax_info = get_xtensa_relax_info (target_sec);
9259 /* Literals to undefined sections may not be moved because they
9260 must report an error. */
9261 if (bfd_is_und_section (target_sec))
9264 src_entry = elf_xtensa_find_property_entry
9265 (prop_table, ptblsize, sec->vma + rel->r_rel.target_offset);
9267 if (!section_cache_section (target_sec_cache, target_sec, link_info))
9270 target_entry = elf_xtensa_find_property_entry
9271 (target_sec_cache->ptbl, target_sec_cache->pte_count,
9272 target_sec->vma + target_loc->target_offset);
9277 /* Make sure that we have not broken any branches. */
9280 init_ebb_constraint (&ebb_table);
9281 ebb = &ebb_table.ebb;
9282 init_ebb (ebb, target_sec_cache->sec, target_sec_cache->contents,
9283 target_sec_cache->content_length,
9284 target_sec_cache->ptbl, target_sec_cache->pte_count,
9285 target_sec_cache->relocs, target_sec_cache->reloc_count);
9287 /* Propose to add 4 bytes + worst-case alignment size increase to
9289 ebb_propose_action (&ebb_table, EBB_NO_ALIGN, 0,
9290 ta_fill, target_loc->target_offset,
9291 -4 - (1 << target_sec->alignment_power), TRUE);
9293 /* Check all of the PC-relative relocations to make sure they still fit. */
9294 relocs_fit = check_section_ebb_pcrels_fit (target_sec->owner, target_sec,
9295 target_sec_cache->contents,
9296 target_sec_cache->relocs, NULL,
9302 text_action_add_literal (&target_relax_info->action_list,
9303 ta_add_literal, target_loc, lit_value, -4);
9305 if (target_sec->alignment_power > 2 && target_entry != src_entry)
9307 /* May need to add or remove some fill to maintain alignment. */
9308 int fill_extra_space;
9309 bfd_vma entry_sec_offset;
9312 target_entry->address - target_sec->vma + target_entry->size;
9314 /* If the literal range is at the end of the section,
9316 fill_extra_space = 0;
9318 elf_xtensa_find_property_entry (target_sec_cache->ptbl,
9319 target_sec_cache->pte_count,
9321 if (the_add_entry && (the_add_entry->flags & XTENSA_PROP_UNREACHABLE))
9322 fill_extra_space = the_add_entry->size;
9324 target_fa = find_fill_action (&target_relax_info->action_list,
9325 target_sec, entry_sec_offset);
9326 removed_diff = compute_removed_action_diff (target_fa, target_sec,
9327 entry_sec_offset, 4,
9330 adjust_fill_action (target_fa, removed_diff);
9332 text_action_add (&target_relax_info->action_list,
9333 ta_fill, target_sec, entry_sec_offset, removed_diff);
9336 /* Mark that the literal will be moved to the new location. */
9337 add_removed_literal (&relax_info->removed_list, &rel->r_rel, target_loc);
9339 /* Remove the literal. */
9340 text_action_add (&relax_info->action_list,
9341 ta_remove_literal, sec, rel->r_rel.target_offset, 4);
9343 /* If the section is 4-byte aligned, do not add fill. */
9344 if (sec->alignment_power > 2 && target_entry != src_entry)
9346 int fill_extra_space;
9347 bfd_vma entry_sec_offset;
9350 entry_sec_offset = src_entry->address - sec->vma + src_entry->size;
9352 entry_sec_offset = rel->r_rel.target_offset+4;
9354 /* If the literal range is at the end of the section,
9356 fill_extra_space = 0;
9357 the_add_entry = elf_xtensa_find_property_entry (prop_table, ptblsize,
9359 if (the_add_entry && (the_add_entry->flags & XTENSA_PROP_UNREACHABLE))
9360 fill_extra_space = the_add_entry->size;
9362 fa = find_fill_action (&relax_info->action_list, sec, entry_sec_offset);
9363 removed_diff = compute_removed_action_diff (fa, sec, entry_sec_offset,
9364 -4, fill_extra_space);
9366 adjust_fill_action (fa, removed_diff);
9368 text_action_add (&relax_info->action_list,
9369 ta_fill, sec, entry_sec_offset, removed_diff);
9376 /* Second relaxation pass. */
9379 action_remove_bytes_fn (splay_tree_node node, void *p)
9381 bfd_size_type *final_size = p;
9382 text_action *action = (text_action *)node->value;
9384 *final_size -= action->removed_bytes;
9388 /* Modify all of the relocations to point to the right spot, and if this
9389 is a relaxable section, delete the unwanted literals and fix the
9393 relax_section (bfd *abfd, asection *sec, struct bfd_link_info *link_info)
9395 Elf_Internal_Rela *internal_relocs;
9396 xtensa_relax_info *relax_info;
9398 bfd_boolean ok = TRUE;
9400 bfd_boolean rv = FALSE;
9401 bfd_boolean virtual_action;
9402 bfd_size_type sec_size;
9404 sec_size = bfd_get_section_limit (abfd, sec);
9405 relax_info = get_xtensa_relax_info (sec);
9406 BFD_ASSERT (relax_info);
9408 /* First translate any of the fixes that have been added already. */
9409 translate_section_fixes (sec);
9411 /* Handle property sections (e.g., literal tables) specially. */
9412 if (xtensa_is_property_section (sec))
9414 BFD_ASSERT (!relax_info->is_relaxable_literal_section);
9415 return relax_property_section (abfd, sec, link_info);
9418 internal_relocs = retrieve_internal_relocs (abfd, sec,
9419 link_info->keep_memory);
9420 if (!internal_relocs && !action_list_count (&relax_info->action_list))
9423 contents = retrieve_contents (abfd, sec, link_info->keep_memory);
9424 if (contents == NULL && sec_size != 0)
9430 if (internal_relocs)
9432 for (i = 0; i < sec->reloc_count; i++)
9434 Elf_Internal_Rela *irel;
9435 xtensa_relax_info *target_relax_info;
9436 bfd_vma source_offset, old_source_offset;
9439 asection *target_sec;
9441 /* Locally change the source address.
9442 Translate the target to the new target address.
9443 If it points to this section and has been removed,
9447 irel = &internal_relocs[i];
9448 source_offset = irel->r_offset;
9449 old_source_offset = source_offset;
9451 r_type = ELF32_R_TYPE (irel->r_info);
9452 r_reloc_init (&r_rel, abfd, irel, contents,
9453 bfd_get_section_limit (abfd, sec));
9455 /* If this section could have changed then we may need to
9456 change the relocation's offset. */
9458 if (relax_info->is_relaxable_literal_section
9459 || relax_info->is_relaxable_asm_section)
9461 pin_internal_relocs (sec, internal_relocs);
9463 if (r_type != R_XTENSA_NONE
9464 && find_removed_literal (&relax_info->removed_list,
9467 /* Remove this relocation. */
9468 if (elf_hash_table (link_info)->dynamic_sections_created)
9469 shrink_dynamic_reloc_sections (link_info, abfd, sec, irel);
9470 irel->r_info = ELF32_R_INFO (0, R_XTENSA_NONE);
9471 irel->r_offset = offset_with_removed_text_map
9472 (&relax_info->action_list, irel->r_offset);
9476 if (r_type == R_XTENSA_ASM_SIMPLIFY)
9478 text_action *action =
9479 find_insn_action (&relax_info->action_list,
9481 if (action && (action->action == ta_convert_longcall
9482 || action->action == ta_remove_longcall))
9484 bfd_reloc_status_type retval;
9485 char *error_message = NULL;
9487 retval = contract_asm_expansion (contents, sec_size,
9488 irel, &error_message);
9489 if (retval != bfd_reloc_ok)
9491 (*link_info->callbacks->reloc_dangerous)
9492 (link_info, error_message, abfd, sec,
9496 /* Update the action so that the code that moves
9497 the contents will do the right thing. */
9498 /* ta_remove_longcall and ta_remove_insn actions are
9499 grouped together in the tree as well as
9500 ta_convert_longcall and ta_none, so that changes below
9501 can be done w/o removing and reinserting action into
9504 if (action->action == ta_remove_longcall)
9505 action->action = ta_remove_insn;
9507 action->action = ta_none;
9508 /* Refresh the info in the r_rel. */
9509 r_reloc_init (&r_rel, abfd, irel, contents, sec_size);
9510 r_type = ELF32_R_TYPE (irel->r_info);
9514 source_offset = offset_with_removed_text_map
9515 (&relax_info->action_list, irel->r_offset);
9516 irel->r_offset = source_offset;
9519 /* If the target section could have changed then
9520 we may need to change the relocation's target offset. */
9522 target_sec = r_reloc_get_section (&r_rel);
9524 /* For a reference to a discarded section from a DWARF section,
9525 i.e., where action_discarded is PRETEND, the symbol will
9526 eventually be modified to refer to the kept section (at least if
9527 the kept and discarded sections are the same size). Anticipate
9528 that here and adjust things accordingly. */
9529 if (! elf_xtensa_ignore_discarded_relocs (sec)
9530 && elf_xtensa_action_discarded (sec) == PRETEND
9531 && sec->sec_info_type != SEC_INFO_TYPE_STABS
9532 && target_sec != NULL
9533 && discarded_section (target_sec))
9535 /* It would be natural to call _bfd_elf_check_kept_section
9536 here, but it's not exported from elflink.c. It's also a
9537 fairly expensive check. Adjusting the relocations to the
9538 discarded section is fairly harmless; it will only adjust
9539 some addends and difference values. If it turns out that
9540 _bfd_elf_check_kept_section fails later, it won't matter,
9541 so just compare the section names to find the right group
9543 asection *kept = target_sec->kept_section;
9546 if ((kept->flags & SEC_GROUP) != 0)
9548 asection *first = elf_next_in_group (kept);
9549 asection *s = first;
9554 if (strcmp (s->name, target_sec->name) == 0)
9559 s = elf_next_in_group (s);
9566 && ((target_sec->rawsize != 0
9567 ? target_sec->rawsize : target_sec->size)
9568 == (kept->rawsize != 0 ? kept->rawsize : kept->size)))
9572 target_relax_info = get_xtensa_relax_info (target_sec);
9573 if (target_relax_info
9574 && (target_relax_info->is_relaxable_literal_section
9575 || target_relax_info->is_relaxable_asm_section))
9578 target_sec = translate_reloc (&r_rel, &new_reloc, target_sec);
9580 if (r_type == R_XTENSA_DIFF8
9581 || r_type == R_XTENSA_DIFF16
9582 || r_type == R_XTENSA_DIFF32)
9584 bfd_signed_vma diff_value = 0;
9585 bfd_vma new_end_offset, diff_mask = 0;
9587 if (bfd_get_section_limit (abfd, sec) < old_source_offset)
9589 (*link_info->callbacks->reloc_dangerous)
9590 (link_info, _("invalid relocation address"),
9591 abfd, sec, old_source_offset);
9597 case R_XTENSA_DIFF8:
9599 bfd_get_signed_8 (abfd, &contents[old_source_offset]);
9601 case R_XTENSA_DIFF16:
9603 bfd_get_signed_16 (abfd, &contents[old_source_offset]);
9605 case R_XTENSA_DIFF32:
9607 bfd_get_signed_32 (abfd, &contents[old_source_offset]);
9611 new_end_offset = offset_with_removed_text_map
9612 (&target_relax_info->action_list,
9613 r_rel.target_offset + diff_value);
9614 diff_value = new_end_offset - new_reloc.target_offset;
9618 case R_XTENSA_DIFF8:
9620 bfd_put_signed_8 (abfd, diff_value,
9621 &contents[old_source_offset]);
9623 case R_XTENSA_DIFF16:
9625 bfd_put_signed_16 (abfd, diff_value,
9626 &contents[old_source_offset]);
9628 case R_XTENSA_DIFF32:
9629 diff_mask = 0x7fffffff;
9630 bfd_put_signed_32 (abfd, diff_value,
9631 &contents[old_source_offset]);
9635 /* Check for overflow. Sign bits must be all zeroes or all ones */
9636 if ((diff_value & ~diff_mask) != 0 &&
9637 (diff_value & ~diff_mask) != (-1 & ~diff_mask))
9639 (*link_info->callbacks->reloc_dangerous)
9640 (link_info, _("overflow after relaxation"),
9641 abfd, sec, old_source_offset);
9645 pin_contents (sec, contents);
9648 /* If the relocation still references a section in the same
9649 input file, modify the relocation directly instead of
9650 adding a "fix" record. */
9651 if (target_sec->owner == abfd)
9653 unsigned r_symndx = ELF32_R_SYM (new_reloc.rela.r_info);
9654 irel->r_info = ELF32_R_INFO (r_symndx, r_type);
9655 irel->r_addend = new_reloc.rela.r_addend;
9656 pin_internal_relocs (sec, internal_relocs);
9660 bfd_vma addend_displacement;
9663 addend_displacement =
9664 new_reloc.target_offset + new_reloc.virtual_offset;
9665 fix = reloc_bfd_fix_init (sec, source_offset, r_type,
9667 addend_displacement, TRUE);
9674 if ((relax_info->is_relaxable_literal_section
9675 || relax_info->is_relaxable_asm_section)
9676 && action_list_count (&relax_info->action_list))
9678 /* Walk through the planned actions and build up a table
9679 of move, copy and fill records. Use the move, copy and
9680 fill records to perform the actions once. */
9682 bfd_size_type final_size, copy_size, orig_insn_size;
9683 bfd_byte *scratch = NULL;
9684 bfd_byte *dup_contents = NULL;
9685 bfd_size_type orig_size = sec->size;
9686 bfd_vma orig_dot = 0;
9687 bfd_vma orig_dot_copied = 0; /* Byte copied already from
9688 orig dot in physical memory. */
9689 bfd_vma orig_dot_vo = 0; /* Virtual offset from orig_dot. */
9690 bfd_vma dup_dot = 0;
9692 text_action *action;
9694 final_size = sec->size;
9696 splay_tree_foreach (relax_info->action_list.tree,
9697 action_remove_bytes_fn, &final_size);
9698 scratch = (bfd_byte *) bfd_zmalloc (final_size);
9699 dup_contents = (bfd_byte *) bfd_zmalloc (final_size);
9701 /* The dot is the current fill location. */
9703 print_action_list (stderr, &relax_info->action_list);
9706 for (action = action_first (&relax_info->action_list); action;
9707 action = action_next (&relax_info->action_list, action))
9709 virtual_action = FALSE;
9710 if (action->offset > orig_dot)
9712 orig_dot += orig_dot_copied;
9713 orig_dot_copied = 0;
9715 /* Out of the virtual world. */
9718 if (action->offset > orig_dot)
9720 copy_size = action->offset - orig_dot;
9721 memmove (&dup_contents[dup_dot], &contents[orig_dot], copy_size);
9722 orig_dot += copy_size;
9723 dup_dot += copy_size;
9724 BFD_ASSERT (action->offset == orig_dot);
9726 else if (action->offset < orig_dot)
9728 if (action->action == ta_fill
9729 && action->offset - action->removed_bytes == orig_dot)
9731 /* This is OK because the fill only effects the dup_dot. */
9733 else if (action->action == ta_add_literal)
9735 /* TBD. Might need to handle this. */
9738 if (action->offset == orig_dot)
9740 if (action->virtual_offset > orig_dot_vo)
9742 if (orig_dot_vo == 0)
9744 /* Need to copy virtual_offset bytes. Probably four. */
9745 copy_size = action->virtual_offset - orig_dot_vo;
9746 memmove (&dup_contents[dup_dot],
9747 &contents[orig_dot], copy_size);
9748 orig_dot_copied = copy_size;
9749 dup_dot += copy_size;
9751 virtual_action = TRUE;
9754 BFD_ASSERT (action->virtual_offset <= orig_dot_vo);
9756 switch (action->action)
9758 case ta_remove_literal:
9759 case ta_remove_insn:
9760 BFD_ASSERT (action->removed_bytes >= 0);
9761 orig_dot += action->removed_bytes;
9764 case ta_narrow_insn:
9767 memmove (scratch, &contents[orig_dot], orig_insn_size);
9768 BFD_ASSERT (action->removed_bytes == 1);
9769 rv = narrow_instruction (scratch, final_size, 0);
9771 memmove (&dup_contents[dup_dot], scratch, copy_size);
9772 orig_dot += orig_insn_size;
9773 dup_dot += copy_size;
9777 if (action->removed_bytes >= 0)
9778 orig_dot += action->removed_bytes;
9781 /* Already zeroed in dup_contents. Just bump the
9783 dup_dot += (-action->removed_bytes);
9788 BFD_ASSERT (action->removed_bytes == 0);
9791 case ta_convert_longcall:
9792 case ta_remove_longcall:
9793 /* These will be removed or converted before we get here. */
9800 memmove (scratch, &contents[orig_dot], orig_insn_size);
9801 BFD_ASSERT (action->removed_bytes == -1);
9802 rv = widen_instruction (scratch, final_size, 0);
9804 memmove (&dup_contents[dup_dot], scratch, copy_size);
9805 orig_dot += orig_insn_size;
9806 dup_dot += copy_size;
9809 case ta_add_literal:
9812 BFD_ASSERT (action->removed_bytes == -4);
9813 /* TBD -- place the literal value here and insert
9815 memset (&dup_contents[dup_dot], 0, 4);
9816 pin_internal_relocs (sec, internal_relocs);
9817 pin_contents (sec, contents);
9819 if (!move_literal (abfd, link_info, sec, dup_dot, dup_contents,
9820 relax_info, &internal_relocs, &action->value))
9824 orig_dot_vo += copy_size;
9826 orig_dot += orig_insn_size;
9827 dup_dot += copy_size;
9831 /* Not implemented yet. */
9836 BFD_ASSERT (dup_dot <= final_size);
9837 BFD_ASSERT (orig_dot <= orig_size);
9840 orig_dot += orig_dot_copied;
9841 orig_dot_copied = 0;
9843 if (orig_dot != orig_size)
9845 copy_size = orig_size - orig_dot;
9846 BFD_ASSERT (orig_size > orig_dot);
9847 BFD_ASSERT (dup_dot + copy_size == final_size);
9848 memmove (&dup_contents[dup_dot], &contents[orig_dot], copy_size);
9849 orig_dot += copy_size;
9850 dup_dot += copy_size;
9852 BFD_ASSERT (orig_size == orig_dot);
9853 BFD_ASSERT (final_size == dup_dot);
9855 /* Move the dup_contents back. */
9856 if (final_size > orig_size)
9858 /* Contents need to be reallocated. Swap the dup_contents into
9860 sec->contents = dup_contents;
9862 contents = dup_contents;
9863 pin_contents (sec, contents);
9867 BFD_ASSERT (final_size <= orig_size);
9868 memset (contents, 0, orig_size);
9869 memcpy (contents, dup_contents, final_size);
9870 free (dup_contents);
9873 pin_contents (sec, contents);
9875 if (sec->rawsize == 0)
9876 sec->rawsize = sec->size;
9877 sec->size = final_size;
9881 release_internal_relocs (sec, internal_relocs);
9882 release_contents (sec, contents);
9888 translate_section_fixes (asection *sec)
9890 xtensa_relax_info *relax_info;
9893 relax_info = get_xtensa_relax_info (sec);
9897 for (r = relax_info->fix_list; r != NULL; r = r->next)
9898 if (!translate_reloc_bfd_fix (r))
9905 /* Translate a fix given the mapping in the relax info for the target
9906 section. If it has already been translated, no work is required. */
9909 translate_reloc_bfd_fix (reloc_bfd_fix *fix)
9911 reloc_bfd_fix new_fix;
9913 xtensa_relax_info *relax_info;
9914 removed_literal *removed;
9915 bfd_vma new_offset, target_offset;
9917 if (fix->translated)
9920 sec = fix->target_sec;
9921 target_offset = fix->target_offset;
9923 relax_info = get_xtensa_relax_info (sec);
9926 fix->translated = TRUE;
9932 /* The fix does not need to be translated if the section cannot change. */
9933 if (!relax_info->is_relaxable_literal_section
9934 && !relax_info->is_relaxable_asm_section)
9936 fix->translated = TRUE;
9940 /* If the literal has been moved and this relocation was on an
9941 opcode, then the relocation should move to the new literal
9942 location. Otherwise, the relocation should move within the
9946 if (is_operand_relocation (fix->src_type))
9948 /* Check if the original relocation is against a literal being
9950 removed = find_removed_literal (&relax_info->removed_list,
9958 /* The fact that there is still a relocation to this literal indicates
9959 that the literal is being coalesced, not simply removed. */
9960 BFD_ASSERT (removed->to.abfd != NULL);
9962 /* This was moved to some other address (possibly another section). */
9963 new_sec = r_reloc_get_section (&removed->to);
9967 relax_info = get_xtensa_relax_info (sec);
9969 (!relax_info->is_relaxable_literal_section
9970 && !relax_info->is_relaxable_asm_section))
9972 target_offset = removed->to.target_offset;
9973 new_fix.target_sec = new_sec;
9974 new_fix.target_offset = target_offset;
9975 new_fix.translated = TRUE;
9980 target_offset = removed->to.target_offset;
9981 new_fix.target_sec = new_sec;
9984 /* The target address may have been moved within its section. */
9985 new_offset = offset_with_removed_text (&relax_info->action_list,
9988 new_fix.target_offset = new_offset;
9989 new_fix.target_offset = new_offset;
9990 new_fix.translated = TRUE;
9996 /* Fix up a relocation to take account of removed literals. */
9999 translate_reloc (const r_reloc *orig_rel, r_reloc *new_rel, asection *sec)
10001 xtensa_relax_info *relax_info;
10002 removed_literal *removed;
10003 bfd_vma target_offset, base_offset;
10005 *new_rel = *orig_rel;
10007 if (!r_reloc_is_defined (orig_rel))
10010 relax_info = get_xtensa_relax_info (sec);
10011 BFD_ASSERT (relax_info && (relax_info->is_relaxable_literal_section
10012 || relax_info->is_relaxable_asm_section));
10014 target_offset = orig_rel->target_offset;
10017 if (is_operand_relocation (ELF32_R_TYPE (orig_rel->rela.r_info)))
10019 /* Check if the original relocation is against a literal being
10021 removed = find_removed_literal (&relax_info->removed_list,
10024 if (removed && removed->to.abfd)
10028 /* The fact that there is still a relocation to this literal indicates
10029 that the literal is being coalesced, not simply removed. */
10030 BFD_ASSERT (removed->to.abfd != NULL);
10032 /* This was moved to some other address
10033 (possibly in another section). */
10034 *new_rel = removed->to;
10035 new_sec = r_reloc_get_section (new_rel);
10036 if (new_sec != sec)
10039 relax_info = get_xtensa_relax_info (sec);
10041 || (!relax_info->is_relaxable_literal_section
10042 && !relax_info->is_relaxable_asm_section))
10045 target_offset = new_rel->target_offset;
10048 /* Find the base offset of the reloc symbol, excluding any addend from the
10049 reloc or from the section contents (for a partial_inplace reloc). Then
10050 find the adjusted values of the offsets due to relaxation. The base
10051 offset is needed to determine the change to the reloc's addend; the reloc
10052 addend should not be adjusted due to relaxations located before the base
10055 base_offset = r_reloc_get_target_offset (new_rel) - new_rel->rela.r_addend;
10056 if (base_offset <= target_offset)
10058 int base_removed = removed_by_actions_map (&relax_info->action_list,
10059 base_offset, FALSE);
10060 int addend_removed = removed_by_actions_map (&relax_info->action_list,
10061 target_offset, FALSE) -
10064 new_rel->target_offset = target_offset - base_removed - addend_removed;
10065 new_rel->rela.r_addend -= addend_removed;
10069 /* Handle a negative addend. The base offset comes first. */
10070 int tgt_removed = removed_by_actions_map (&relax_info->action_list,
10071 target_offset, FALSE);
10072 int addend_removed = removed_by_actions_map (&relax_info->action_list,
10073 base_offset, FALSE) -
10076 new_rel->target_offset = target_offset - tgt_removed;
10077 new_rel->rela.r_addend += addend_removed;
10084 /* For dynamic links, there may be a dynamic relocation for each
10085 literal. The number of dynamic relocations must be computed in
10086 size_dynamic_sections, which occurs before relaxation. When a
10087 literal is removed, this function checks if there is a corresponding
10088 dynamic relocation and shrinks the size of the appropriate dynamic
10089 relocation section accordingly. At this point, the contents of the
10090 dynamic relocation sections have not yet been filled in, so there's
10091 nothing else that needs to be done. */
10094 shrink_dynamic_reloc_sections (struct bfd_link_info *info,
10096 asection *input_section,
10097 Elf_Internal_Rela *rel)
10099 struct elf_xtensa_link_hash_table *htab;
10100 Elf_Internal_Shdr *symtab_hdr;
10101 struct elf_link_hash_entry **sym_hashes;
10102 unsigned long r_symndx;
10104 struct elf_link_hash_entry *h;
10105 bfd_boolean dynamic_symbol;
10107 htab = elf_xtensa_hash_table (info);
10111 symtab_hdr = &elf_tdata (abfd)->symtab_hdr;
10112 sym_hashes = elf_sym_hashes (abfd);
10114 r_type = ELF32_R_TYPE (rel->r_info);
10115 r_symndx = ELF32_R_SYM (rel->r_info);
10117 if (r_symndx < symtab_hdr->sh_info)
10120 h = sym_hashes[r_symndx - symtab_hdr->sh_info];
10122 dynamic_symbol = elf_xtensa_dynamic_symbol_p (h, info);
10124 if ((r_type == R_XTENSA_32 || r_type == R_XTENSA_PLT)
10125 && (input_section->flags & SEC_ALLOC) != 0
10126 && (dynamic_symbol || bfd_link_pic (info)))
10129 bfd_boolean is_plt = FALSE;
10131 if (dynamic_symbol && r_type == R_XTENSA_PLT)
10133 srel = htab->elf.srelplt;
10137 srel = htab->elf.srelgot;
10139 /* Reduce size of the .rela.* section by one reloc. */
10140 BFD_ASSERT (srel != NULL);
10141 BFD_ASSERT (srel->size >= sizeof (Elf32_External_Rela));
10142 srel->size -= sizeof (Elf32_External_Rela);
10146 asection *splt, *sgotplt, *srelgot;
10147 int reloc_index, chunk;
10149 /* Find the PLT reloc index of the entry being removed. This
10150 is computed from the size of ".rela.plt". It is needed to
10151 figure out which PLT chunk to resize. Usually "last index
10152 = size - 1" since the index starts at zero, but in this
10153 context, the size has just been decremented so there's no
10154 need to subtract one. */
10155 reloc_index = srel->size / sizeof (Elf32_External_Rela);
10157 chunk = reloc_index / PLT_ENTRIES_PER_CHUNK;
10158 splt = elf_xtensa_get_plt_section (info, chunk);
10159 sgotplt = elf_xtensa_get_gotplt_section (info, chunk);
10160 BFD_ASSERT (splt != NULL && sgotplt != NULL);
10162 /* Check if an entire PLT chunk has just been eliminated. */
10163 if (reloc_index % PLT_ENTRIES_PER_CHUNK == 0)
10165 /* The two magic GOT entries for that chunk can go away. */
10166 srelgot = htab->elf.srelgot;
10167 BFD_ASSERT (srelgot != NULL);
10168 srelgot->reloc_count -= 2;
10169 srelgot->size -= 2 * sizeof (Elf32_External_Rela);
10170 sgotplt->size -= 8;
10172 /* There should be only one entry left (and it will be
10174 BFD_ASSERT (sgotplt->size == 4);
10175 BFD_ASSERT (splt->size == PLT_ENTRY_SIZE);
10178 BFD_ASSERT (sgotplt->size >= 4);
10179 BFD_ASSERT (splt->size >= PLT_ENTRY_SIZE);
10181 sgotplt->size -= 4;
10182 splt->size -= PLT_ENTRY_SIZE;
10188 /* Take an r_rel and move it to another section. This usually
10189 requires extending the interal_relocation array and pinning it. If
10190 the original r_rel is from the same BFD, we can complete this here.
10191 Otherwise, we add a fix record to let the final link fix the
10192 appropriate address. Contents and internal relocations for the
10193 section must be pinned after calling this routine. */
10196 move_literal (bfd *abfd,
10197 struct bfd_link_info *link_info,
10200 bfd_byte *contents,
10201 xtensa_relax_info *relax_info,
10202 Elf_Internal_Rela **internal_relocs_p,
10203 const literal_value *lit)
10205 Elf_Internal_Rela *new_relocs = NULL;
10206 size_t new_relocs_count = 0;
10207 Elf_Internal_Rela this_rela;
10208 const r_reloc *r_rel;
10210 r_rel = &lit->r_rel;
10211 BFD_ASSERT (elf_section_data (sec)->relocs == *internal_relocs_p);
10213 if (r_reloc_is_const (r_rel))
10214 bfd_put_32 (abfd, lit->value, contents + offset);
10219 reloc_bfd_fix *fix;
10220 unsigned insert_at;
10222 r_type = ELF32_R_TYPE (r_rel->rela.r_info);
10224 /* This is the difficult case. We have to create a fix up. */
10225 this_rela.r_offset = offset;
10226 this_rela.r_info = ELF32_R_INFO (0, r_type);
10227 this_rela.r_addend =
10228 r_rel->target_offset - r_reloc_get_target_offset (r_rel);
10229 bfd_put_32 (abfd, lit->value, contents + offset);
10231 /* Currently, we cannot move relocations during a relocatable link. */
10232 BFD_ASSERT (!bfd_link_relocatable (link_info));
10233 fix = reloc_bfd_fix_init (sec, offset, r_type,
10234 r_reloc_get_section (r_rel),
10235 r_rel->target_offset + r_rel->virtual_offset,
10237 /* We also need to mark that relocations are needed here. */
10238 sec->flags |= SEC_RELOC;
10240 translate_reloc_bfd_fix (fix);
10241 /* This fix has not yet been translated. */
10242 add_fix (sec, fix);
10244 /* Add the relocation. If we have already allocated our own
10245 space for the relocations and we have room for more, then use
10246 it. Otherwise, allocate new space and move the literals. */
10247 insert_at = sec->reloc_count;
10248 for (i = 0; i < sec->reloc_count; ++i)
10250 if (this_rela.r_offset < (*internal_relocs_p)[i].r_offset)
10257 if (*internal_relocs_p != relax_info->allocated_relocs
10258 || sec->reloc_count + 1 > relax_info->allocated_relocs_count)
10260 BFD_ASSERT (relax_info->allocated_relocs == NULL
10261 || sec->reloc_count == relax_info->relocs_count);
10263 if (relax_info->allocated_relocs_count == 0)
10264 new_relocs_count = (sec->reloc_count + 2) * 2;
10266 new_relocs_count = (relax_info->allocated_relocs_count + 2) * 2;
10268 new_relocs = (Elf_Internal_Rela *)
10269 bfd_zmalloc (sizeof (Elf_Internal_Rela) * (new_relocs_count));
10273 /* We could handle this more quickly by finding the split point. */
10274 if (insert_at != 0)
10275 memcpy (new_relocs, *internal_relocs_p,
10276 insert_at * sizeof (Elf_Internal_Rela));
10278 new_relocs[insert_at] = this_rela;
10280 if (insert_at != sec->reloc_count)
10281 memcpy (new_relocs + insert_at + 1,
10282 (*internal_relocs_p) + insert_at,
10283 (sec->reloc_count - insert_at)
10284 * sizeof (Elf_Internal_Rela));
10286 if (*internal_relocs_p != relax_info->allocated_relocs)
10288 /* The first time we re-allocate, we can only free the
10289 old relocs if they were allocated with bfd_malloc.
10290 This is not true when keep_memory is in effect. */
10291 if (!link_info->keep_memory)
10292 free (*internal_relocs_p);
10295 free (*internal_relocs_p);
10296 relax_info->allocated_relocs = new_relocs;
10297 relax_info->allocated_relocs_count = new_relocs_count;
10298 elf_section_data (sec)->relocs = new_relocs;
10299 sec->reloc_count++;
10300 relax_info->relocs_count = sec->reloc_count;
10301 *internal_relocs_p = new_relocs;
10305 if (insert_at != sec->reloc_count)
10308 for (idx = sec->reloc_count; idx > insert_at; idx--)
10309 (*internal_relocs_p)[idx] = (*internal_relocs_p)[idx-1];
10311 (*internal_relocs_p)[insert_at] = this_rela;
10312 sec->reloc_count++;
10313 if (relax_info->allocated_relocs)
10314 relax_info->relocs_count = sec->reloc_count;
10321 /* This is similar to relax_section except that when a target is moved,
10322 we shift addresses up. We also need to modify the size. This
10323 algorithm does NOT allow for relocations into the middle of the
10324 property sections. */
10327 relax_property_section (bfd *abfd,
10329 struct bfd_link_info *link_info)
10331 Elf_Internal_Rela *internal_relocs;
10332 bfd_byte *contents;
10334 bfd_boolean ok = TRUE;
10335 bfd_boolean is_full_prop_section;
10336 size_t last_zfill_target_offset = 0;
10337 asection *last_zfill_target_sec = NULL;
10338 bfd_size_type sec_size;
10339 bfd_size_type entry_size;
10341 sec_size = bfd_get_section_limit (abfd, sec);
10342 internal_relocs = retrieve_internal_relocs (abfd, sec,
10343 link_info->keep_memory);
10344 contents = retrieve_contents (abfd, sec, link_info->keep_memory);
10345 if (contents == NULL && sec_size != 0)
10351 is_full_prop_section = xtensa_is_proptable_section (sec);
10352 if (is_full_prop_section)
10357 if (internal_relocs)
10359 for (i = 0; i < sec->reloc_count; i++)
10361 Elf_Internal_Rela *irel;
10362 xtensa_relax_info *target_relax_info;
10364 asection *target_sec;
10366 bfd_byte *size_p, *flags_p;
10368 /* Locally change the source address.
10369 Translate the target to the new target address.
10370 If it points to this section and has been removed, MOVE IT.
10371 Also, don't forget to modify the associated SIZE at
10374 irel = &internal_relocs[i];
10375 r_type = ELF32_R_TYPE (irel->r_info);
10376 if (r_type == R_XTENSA_NONE)
10379 /* Find the literal value. */
10380 r_reloc_init (&val.r_rel, abfd, irel, contents, sec_size);
10381 size_p = &contents[irel->r_offset + 4];
10383 if (is_full_prop_section)
10384 flags_p = &contents[irel->r_offset + 8];
10385 BFD_ASSERT (irel->r_offset + entry_size <= sec_size);
10387 target_sec = r_reloc_get_section (&val.r_rel);
10388 target_relax_info = get_xtensa_relax_info (target_sec);
10390 if (target_relax_info
10391 && (target_relax_info->is_relaxable_literal_section
10392 || target_relax_info->is_relaxable_asm_section ))
10394 /* Translate the relocation's destination. */
10395 bfd_vma old_offset = val.r_rel.target_offset;
10396 bfd_vma new_offset;
10397 long old_size, new_size;
10398 int removed_by_old_offset =
10399 removed_by_actions_map (&target_relax_info->action_list,
10400 old_offset, FALSE);
10401 new_offset = old_offset - removed_by_old_offset;
10403 /* Assert that we are not out of bounds. */
10404 old_size = bfd_get_32 (abfd, size_p);
10405 new_size = old_size;
10409 /* Only the first zero-sized unreachable entry is
10410 allowed to expand. In this case the new offset
10411 should be the offset before the fill and the new
10412 size is the expansion size. For other zero-sized
10413 entries the resulting size should be zero with an
10414 offset before or after the fill address depending
10415 on whether the expanding unreachable entry
10417 if (last_zfill_target_sec == 0
10418 || last_zfill_target_sec != target_sec
10419 || last_zfill_target_offset != old_offset)
10421 bfd_vma new_end_offset = new_offset;
10423 /* Recompute the new_offset, but this time don't
10424 include any fill inserted by relaxation. */
10425 removed_by_old_offset =
10426 removed_by_actions_map (&target_relax_info->action_list,
10428 new_offset = old_offset - removed_by_old_offset;
10430 /* If it is not unreachable and we have not yet
10431 seen an unreachable at this address, place it
10432 before the fill address. */
10433 if (flags_p && (bfd_get_32 (abfd, flags_p)
10434 & XTENSA_PROP_UNREACHABLE) != 0)
10436 new_size = new_end_offset - new_offset;
10438 last_zfill_target_sec = target_sec;
10439 last_zfill_target_offset = old_offset;
10445 int removed_by_old_offset_size =
10446 removed_by_actions_map (&target_relax_info->action_list,
10447 old_offset + old_size, TRUE);
10448 new_size -= removed_by_old_offset_size - removed_by_old_offset;
10451 if (new_size != old_size)
10453 bfd_put_32 (abfd, new_size, size_p);
10454 pin_contents (sec, contents);
10457 if (new_offset != old_offset)
10459 bfd_vma diff = new_offset - old_offset;
10460 irel->r_addend += diff;
10461 pin_internal_relocs (sec, internal_relocs);
10467 /* Combine adjacent property table entries. This is also done in
10468 finish_dynamic_sections() but at that point it's too late to
10469 reclaim the space in the output section, so we do this twice. */
10471 if (internal_relocs && (!bfd_link_relocatable (link_info)
10472 || xtensa_is_littable_section (sec)))
10474 Elf_Internal_Rela *last_irel = NULL;
10475 Elf_Internal_Rela *irel, *next_rel, *rel_end;
10476 int removed_bytes = 0;
10478 flagword predef_flags;
10480 predef_flags = xtensa_get_property_predef_flags (sec);
10482 /* Walk over memory and relocations at the same time.
10483 This REQUIRES that the internal_relocs be sorted by offset. */
10484 qsort (internal_relocs, sec->reloc_count, sizeof (Elf_Internal_Rela),
10485 internal_reloc_compare);
10487 pin_internal_relocs (sec, internal_relocs);
10488 pin_contents (sec, contents);
10490 next_rel = internal_relocs;
10491 rel_end = internal_relocs + sec->reloc_count;
10493 BFD_ASSERT (sec->size % entry_size == 0);
10495 for (offset = 0; offset < sec->size; offset += entry_size)
10497 Elf_Internal_Rela *offset_rel, *extra_rel;
10498 bfd_vma bytes_to_remove, size, actual_offset;
10499 bfd_boolean remove_this_rel;
10502 /* Find the first relocation for the entry at the current offset.
10503 Adjust the offsets of any extra relocations for the previous
10508 for (irel = next_rel; irel < rel_end; irel++)
10510 if ((irel->r_offset == offset
10511 && ELF32_R_TYPE (irel->r_info) != R_XTENSA_NONE)
10512 || irel->r_offset > offset)
10517 irel->r_offset -= removed_bytes;
10521 /* Find the next relocation (if there are any left). */
10525 for (irel = offset_rel + 1; irel < rel_end; irel++)
10527 if (ELF32_R_TYPE (irel->r_info) != R_XTENSA_NONE)
10535 /* Check if there are relocations on the current entry. There
10536 should usually be a relocation on the offset field. If there
10537 are relocations on the size or flags, then we can't optimize
10538 this entry. Also, find the next relocation to examine on the
10542 if (offset_rel->r_offset >= offset + entry_size)
10544 next_rel = offset_rel;
10545 /* There are no relocations on the current entry, but we
10546 might still be able to remove it if the size is zero. */
10549 else if (offset_rel->r_offset > offset
10551 && extra_rel->r_offset < offset + entry_size))
10553 /* There is a relocation on the size or flags, so we can't
10554 do anything with this entry. Continue with the next. */
10555 next_rel = offset_rel;
10560 BFD_ASSERT (offset_rel->r_offset == offset);
10561 offset_rel->r_offset -= removed_bytes;
10562 next_rel = offset_rel + 1;
10568 remove_this_rel = FALSE;
10569 bytes_to_remove = 0;
10570 actual_offset = offset - removed_bytes;
10571 size = bfd_get_32 (abfd, &contents[actual_offset + 4]);
10573 if (is_full_prop_section)
10574 flags = bfd_get_32 (abfd, &contents[actual_offset + 8]);
10576 flags = predef_flags;
10579 && (flags & XTENSA_PROP_ALIGN) == 0
10580 && (flags & XTENSA_PROP_UNREACHABLE) == 0)
10582 /* Always remove entries with zero size and no alignment. */
10583 bytes_to_remove = entry_size;
10585 remove_this_rel = TRUE;
10587 else if (offset_rel
10588 && ELF32_R_TYPE (offset_rel->r_info) == R_XTENSA_32)
10592 flagword old_flags;
10594 bfd_get_32 (abfd, &contents[last_irel->r_offset + 4]);
10595 bfd_vma old_address =
10596 (last_irel->r_addend
10597 + bfd_get_32 (abfd, &contents[last_irel->r_offset]));
10598 bfd_vma new_address =
10599 (offset_rel->r_addend
10600 + bfd_get_32 (abfd, &contents[actual_offset]));
10601 if (is_full_prop_section)
10602 old_flags = bfd_get_32
10603 (abfd, &contents[last_irel->r_offset + 8]);
10605 old_flags = predef_flags;
10607 if ((ELF32_R_SYM (offset_rel->r_info)
10608 == ELF32_R_SYM (last_irel->r_info))
10609 && old_address + old_size == new_address
10610 && old_flags == flags
10611 && (old_flags & XTENSA_PROP_INSN_BRANCH_TARGET) == 0
10612 && (old_flags & XTENSA_PROP_INSN_LOOP_TARGET) == 0)
10614 /* Fix the old size. */
10615 bfd_put_32 (abfd, old_size + size,
10616 &contents[last_irel->r_offset + 4]);
10617 bytes_to_remove = entry_size;
10618 remove_this_rel = TRUE;
10621 last_irel = offset_rel;
10624 last_irel = offset_rel;
10627 if (remove_this_rel)
10629 offset_rel->r_info = ELF32_R_INFO (0, R_XTENSA_NONE);
10630 offset_rel->r_offset = 0;
10633 if (bytes_to_remove != 0)
10635 removed_bytes += bytes_to_remove;
10636 if (offset + bytes_to_remove < sec->size)
10637 memmove (&contents[actual_offset],
10638 &contents[actual_offset + bytes_to_remove],
10639 sec->size - offset - bytes_to_remove);
10645 /* Fix up any extra relocations on the last entry. */
10646 for (irel = next_rel; irel < rel_end; irel++)
10647 irel->r_offset -= removed_bytes;
10649 /* Clear the removed bytes. */
10650 memset (&contents[sec->size - removed_bytes], 0, removed_bytes);
10652 if (sec->rawsize == 0)
10653 sec->rawsize = sec->size;
10654 sec->size -= removed_bytes;
10656 if (xtensa_is_littable_section (sec))
10658 asection *sgotloc = elf_xtensa_hash_table (link_info)->sgotloc;
10660 sgotloc->size -= removed_bytes;
10666 release_internal_relocs (sec, internal_relocs);
10667 release_contents (sec, contents);
10672 /* Third relaxation pass. */
10674 /* Change symbol values to account for removed literals. */
10677 relax_section_symbols (bfd *abfd, asection *sec)
10679 xtensa_relax_info *relax_info;
10680 unsigned int sec_shndx;
10681 Elf_Internal_Shdr *symtab_hdr;
10682 Elf_Internal_Sym *isymbuf;
10683 unsigned i, num_syms, num_locals;
10685 relax_info = get_xtensa_relax_info (sec);
10686 BFD_ASSERT (relax_info);
10688 if (!relax_info->is_relaxable_literal_section
10689 && !relax_info->is_relaxable_asm_section)
10692 sec_shndx = _bfd_elf_section_from_bfd_section (abfd, sec);
10694 symtab_hdr = &elf_tdata (abfd)->symtab_hdr;
10695 isymbuf = retrieve_local_syms (abfd);
10697 num_syms = symtab_hdr->sh_size / sizeof (Elf32_External_Sym);
10698 num_locals = symtab_hdr->sh_info;
10700 /* Adjust the local symbols defined in this section. */
10701 for (i = 0; i < num_locals; i++)
10703 Elf_Internal_Sym *isym = &isymbuf[i];
10705 if (isym->st_shndx == sec_shndx)
10707 bfd_vma orig_addr = isym->st_value;
10708 int removed = removed_by_actions_map (&relax_info->action_list,
10711 isym->st_value -= removed;
10712 if (ELF32_ST_TYPE (isym->st_info) == STT_FUNC)
10714 removed_by_actions_map (&relax_info->action_list,
10715 orig_addr + isym->st_size, FALSE) -
10720 /* Now adjust the global symbols defined in this section. */
10721 for (i = 0; i < (num_syms - num_locals); i++)
10723 struct elf_link_hash_entry *sym_hash;
10725 sym_hash = elf_sym_hashes (abfd)[i];
10727 if (sym_hash->root.type == bfd_link_hash_warning)
10728 sym_hash = (struct elf_link_hash_entry *) sym_hash->root.u.i.link;
10730 if ((sym_hash->root.type == bfd_link_hash_defined
10731 || sym_hash->root.type == bfd_link_hash_defweak)
10732 && sym_hash->root.u.def.section == sec)
10734 bfd_vma orig_addr = sym_hash->root.u.def.value;
10735 int removed = removed_by_actions_map (&relax_info->action_list,
10738 sym_hash->root.u.def.value -= removed;
10740 if (sym_hash->type == STT_FUNC)
10742 removed_by_actions_map (&relax_info->action_list,
10743 orig_addr + sym_hash->size, FALSE) -
10752 /* "Fix" handling functions, called while performing relocations. */
10755 do_fix_for_relocatable_link (Elf_Internal_Rela *rel,
10757 asection *input_section,
10758 bfd_byte *contents)
10761 asection *sec, *old_sec;
10762 bfd_vma old_offset;
10763 int r_type = ELF32_R_TYPE (rel->r_info);
10764 reloc_bfd_fix *fix;
10766 if (r_type == R_XTENSA_NONE)
10769 fix = get_bfd_fix (input_section, rel->r_offset, r_type);
10773 r_reloc_init (&r_rel, input_bfd, rel, contents,
10774 bfd_get_section_limit (input_bfd, input_section));
10775 old_sec = r_reloc_get_section (&r_rel);
10776 old_offset = r_rel.target_offset;
10778 if (!old_sec || !r_reloc_is_defined (&r_rel))
10780 if (r_type != R_XTENSA_ASM_EXPAND)
10783 /* xgettext:c-format */
10784 (_("%B(%A+%#Lx): unexpected fix for %s relocation"),
10785 input_bfd, input_section, rel->r_offset,
10786 elf_howto_table[r_type].name);
10789 /* Leave it be. Resolution will happen in a later stage. */
10793 sec = fix->target_sec;
10794 rel->r_addend += ((sec->output_offset + fix->target_offset)
10795 - (old_sec->output_offset + old_offset));
10802 do_fix_for_final_link (Elf_Internal_Rela *rel,
10804 asection *input_section,
10805 bfd_byte *contents,
10806 bfd_vma *relocationp)
10809 int r_type = ELF32_R_TYPE (rel->r_info);
10810 reloc_bfd_fix *fix;
10811 bfd_vma fixup_diff;
10813 if (r_type == R_XTENSA_NONE)
10816 fix = get_bfd_fix (input_section, rel->r_offset, r_type);
10820 sec = fix->target_sec;
10822 fixup_diff = rel->r_addend;
10823 if (elf_howto_table[fix->src_type].partial_inplace)
10825 bfd_vma inplace_val;
10826 BFD_ASSERT (fix->src_offset
10827 < bfd_get_section_limit (input_bfd, input_section));
10828 inplace_val = bfd_get_32 (input_bfd, &contents[fix->src_offset]);
10829 fixup_diff += inplace_val;
10832 *relocationp = (sec->output_section->vma
10833 + sec->output_offset
10834 + fix->target_offset - fixup_diff);
10838 /* Miscellaneous utility functions.... */
10841 elf_xtensa_get_plt_section (struct bfd_link_info *info, int chunk)
10847 return elf_hash_table (info)->splt;
10849 dynobj = elf_hash_table (info)->dynobj;
10850 sprintf (plt_name, ".plt.%u", chunk);
10851 return bfd_get_linker_section (dynobj, plt_name);
10856 elf_xtensa_get_gotplt_section (struct bfd_link_info *info, int chunk)
10862 return elf_hash_table (info)->sgotplt;
10864 dynobj = elf_hash_table (info)->dynobj;
10865 sprintf (got_name, ".got.plt.%u", chunk);
10866 return bfd_get_linker_section (dynobj, got_name);
10870 /* Get the input section for a given symbol index.
10872 . a section symbol, return the section;
10873 . a common symbol, return the common section;
10874 . an undefined symbol, return the undefined section;
10875 . an indirect symbol, follow the links;
10876 . an absolute value, return the absolute section. */
10879 get_elf_r_symndx_section (bfd *abfd, unsigned long r_symndx)
10881 Elf_Internal_Shdr *symtab_hdr = &elf_tdata (abfd)->symtab_hdr;
10882 asection *target_sec = NULL;
10883 if (r_symndx < symtab_hdr->sh_info)
10885 Elf_Internal_Sym *isymbuf;
10886 unsigned int section_index;
10888 isymbuf = retrieve_local_syms (abfd);
10889 section_index = isymbuf[r_symndx].st_shndx;
10891 if (section_index == SHN_UNDEF)
10892 target_sec = bfd_und_section_ptr;
10893 else if (section_index == SHN_ABS)
10894 target_sec = bfd_abs_section_ptr;
10895 else if (section_index == SHN_COMMON)
10896 target_sec = bfd_com_section_ptr;
10898 target_sec = bfd_section_from_elf_index (abfd, section_index);
10902 unsigned long indx = r_symndx - symtab_hdr->sh_info;
10903 struct elf_link_hash_entry *h = elf_sym_hashes (abfd)[indx];
10905 while (h->root.type == bfd_link_hash_indirect
10906 || h->root.type == bfd_link_hash_warning)
10907 h = (struct elf_link_hash_entry *) h->root.u.i.link;
10909 switch (h->root.type)
10911 case bfd_link_hash_defined:
10912 case bfd_link_hash_defweak:
10913 target_sec = h->root.u.def.section;
10915 case bfd_link_hash_common:
10916 target_sec = bfd_com_section_ptr;
10918 case bfd_link_hash_undefined:
10919 case bfd_link_hash_undefweak:
10920 target_sec = bfd_und_section_ptr;
10922 default: /* New indirect warning. */
10923 target_sec = bfd_und_section_ptr;
10931 static struct elf_link_hash_entry *
10932 get_elf_r_symndx_hash_entry (bfd *abfd, unsigned long r_symndx)
10934 unsigned long indx;
10935 struct elf_link_hash_entry *h;
10936 Elf_Internal_Shdr *symtab_hdr = &elf_tdata (abfd)->symtab_hdr;
10938 if (r_symndx < symtab_hdr->sh_info)
10941 indx = r_symndx - symtab_hdr->sh_info;
10942 h = elf_sym_hashes (abfd)[indx];
10943 while (h->root.type == bfd_link_hash_indirect
10944 || h->root.type == bfd_link_hash_warning)
10945 h = (struct elf_link_hash_entry *) h->root.u.i.link;
10950 /* Get the section-relative offset for a symbol number. */
10953 get_elf_r_symndx_offset (bfd *abfd, unsigned long r_symndx)
10955 Elf_Internal_Shdr *symtab_hdr = &elf_tdata (abfd)->symtab_hdr;
10956 bfd_vma offset = 0;
10958 if (r_symndx < symtab_hdr->sh_info)
10960 Elf_Internal_Sym *isymbuf;
10961 isymbuf = retrieve_local_syms (abfd);
10962 offset = isymbuf[r_symndx].st_value;
10966 unsigned long indx = r_symndx - symtab_hdr->sh_info;
10967 struct elf_link_hash_entry *h =
10968 elf_sym_hashes (abfd)[indx];
10970 while (h->root.type == bfd_link_hash_indirect
10971 || h->root.type == bfd_link_hash_warning)
10972 h = (struct elf_link_hash_entry *) h->root.u.i.link;
10973 if (h->root.type == bfd_link_hash_defined
10974 || h->root.type == bfd_link_hash_defweak)
10975 offset = h->root.u.def.value;
10982 is_reloc_sym_weak (bfd *abfd, Elf_Internal_Rela *rel)
10984 unsigned long r_symndx = ELF32_R_SYM (rel->r_info);
10985 struct elf_link_hash_entry *h;
10987 h = get_elf_r_symndx_hash_entry (abfd, r_symndx);
10988 if (h && h->root.type == bfd_link_hash_defweak)
10995 pcrel_reloc_fits (xtensa_opcode opc,
10997 bfd_vma self_address,
10998 bfd_vma dest_address)
11000 xtensa_isa isa = xtensa_default_isa;
11001 uint32 valp = dest_address;
11002 if (xtensa_operand_do_reloc (isa, opc, opnd, &valp, self_address)
11003 || xtensa_operand_encode (isa, opc, opnd, &valp))
11010 xtensa_is_property_section (asection *sec)
11012 if (xtensa_is_insntable_section (sec)
11013 || xtensa_is_littable_section (sec)
11014 || xtensa_is_proptable_section (sec))
11022 xtensa_is_insntable_section (asection *sec)
11024 if (CONST_STRNEQ (sec->name, XTENSA_INSN_SEC_NAME)
11025 || CONST_STRNEQ (sec->name, ".gnu.linkonce.x."))
11033 xtensa_is_littable_section (asection *sec)
11035 if (CONST_STRNEQ (sec->name, XTENSA_LIT_SEC_NAME)
11036 || CONST_STRNEQ (sec->name, ".gnu.linkonce.p."))
11044 xtensa_is_proptable_section (asection *sec)
11046 if (CONST_STRNEQ (sec->name, XTENSA_PROP_SEC_NAME)
11047 || CONST_STRNEQ (sec->name, ".gnu.linkonce.prop."))
11055 internal_reloc_compare (const void *ap, const void *bp)
11057 const Elf_Internal_Rela *a = (const Elf_Internal_Rela *) ap;
11058 const Elf_Internal_Rela *b = (const Elf_Internal_Rela *) bp;
11060 if (a->r_offset != b->r_offset)
11061 return (a->r_offset - b->r_offset);
11063 /* We don't need to sort on these criteria for correctness,
11064 but enforcing a more strict ordering prevents unstable qsort
11065 from behaving differently with different implementations.
11066 Without the code below we get correct but different results
11067 on Solaris 2.7 and 2.8. We would like to always produce the
11068 same results no matter the host. */
11070 if (a->r_info != b->r_info)
11071 return (a->r_info - b->r_info);
11073 return (a->r_addend - b->r_addend);
11078 internal_reloc_matches (const void *ap, const void *bp)
11080 const Elf_Internal_Rela *a = (const Elf_Internal_Rela *) ap;
11081 const Elf_Internal_Rela *b = (const Elf_Internal_Rela *) bp;
11083 /* Check if one entry overlaps with the other; this shouldn't happen
11084 except when searching for a match. */
11085 return (a->r_offset - b->r_offset);
11089 /* Predicate function used to look up a section in a particular group. */
11092 match_section_group (bfd *abfd ATTRIBUTE_UNUSED, asection *sec, void *inf)
11094 const char *gname = inf;
11095 const char *group_name = elf_group_name (sec);
11097 return (group_name == gname
11098 || (group_name != NULL
11100 && strcmp (group_name, gname) == 0));
11104 static int linkonce_len = sizeof (".gnu.linkonce.") - 1;
11107 xtensa_property_section_name (asection *sec, const char *base_name)
11109 const char *suffix, *group_name;
11110 char *prop_sec_name;
11112 group_name = elf_group_name (sec);
11115 suffix = strrchr (sec->name, '.');
11116 if (suffix == sec->name)
11118 prop_sec_name = (char *) bfd_malloc (strlen (base_name) + 1
11119 + (suffix ? strlen (suffix) : 0));
11120 strcpy (prop_sec_name, base_name);
11122 strcat (prop_sec_name, suffix);
11124 else if (strncmp (sec->name, ".gnu.linkonce.", linkonce_len) == 0)
11126 char *linkonce_kind = 0;
11128 if (strcmp (base_name, XTENSA_INSN_SEC_NAME) == 0)
11129 linkonce_kind = "x.";
11130 else if (strcmp (base_name, XTENSA_LIT_SEC_NAME) == 0)
11131 linkonce_kind = "p.";
11132 else if (strcmp (base_name, XTENSA_PROP_SEC_NAME) == 0)
11133 linkonce_kind = "prop.";
11137 prop_sec_name = (char *) bfd_malloc (strlen (sec->name)
11138 + strlen (linkonce_kind) + 1);
11139 memcpy (prop_sec_name, ".gnu.linkonce.", linkonce_len);
11140 strcpy (prop_sec_name + linkonce_len, linkonce_kind);
11142 suffix = sec->name + linkonce_len;
11143 /* For backward compatibility, replace "t." instead of inserting
11144 the new linkonce_kind (but not for "prop" sections). */
11145 if (CONST_STRNEQ (suffix, "t.") && linkonce_kind[1] == '.')
11147 strcat (prop_sec_name + linkonce_len, suffix);
11150 prop_sec_name = strdup (base_name);
11152 return prop_sec_name;
11157 xtensa_get_property_section (asection *sec, const char *base_name)
11159 char *prop_sec_name;
11160 asection *prop_sec;
11162 prop_sec_name = xtensa_property_section_name (sec, base_name);
11163 prop_sec = bfd_get_section_by_name_if (sec->owner, prop_sec_name,
11164 match_section_group,
11165 (void *) elf_group_name (sec));
11166 free (prop_sec_name);
11172 xtensa_make_property_section (asection *sec, const char *base_name)
11174 char *prop_sec_name;
11175 asection *prop_sec;
11177 /* Check if the section already exists. */
11178 prop_sec_name = xtensa_property_section_name (sec, base_name);
11179 prop_sec = bfd_get_section_by_name_if (sec->owner, prop_sec_name,
11180 match_section_group,
11181 (void *) elf_group_name (sec));
11182 /* If not, create it. */
11185 flagword flags = (SEC_RELOC | SEC_HAS_CONTENTS | SEC_READONLY);
11186 flags |= (bfd_get_section_flags (sec->owner, sec)
11187 & (SEC_LINK_ONCE | SEC_LINK_DUPLICATES));
11189 prop_sec = bfd_make_section_anyway_with_flags
11190 (sec->owner, strdup (prop_sec_name), flags);
11194 elf_group_name (prop_sec) = elf_group_name (sec);
11197 free (prop_sec_name);
11203 xtensa_get_property_predef_flags (asection *sec)
11205 if (xtensa_is_insntable_section (sec))
11206 return (XTENSA_PROP_INSN
11207 | XTENSA_PROP_NO_TRANSFORM
11208 | XTENSA_PROP_INSN_NO_REORDER);
11210 if (xtensa_is_littable_section (sec))
11211 return (XTENSA_PROP_LITERAL
11212 | XTENSA_PROP_NO_TRANSFORM
11213 | XTENSA_PROP_INSN_NO_REORDER);
11219 /* Other functions called directly by the linker. */
11222 xtensa_callback_required_dependence (bfd *abfd,
11224 struct bfd_link_info *link_info,
11225 deps_callback_t callback,
11228 Elf_Internal_Rela *internal_relocs;
11229 bfd_byte *contents;
11231 bfd_boolean ok = TRUE;
11232 bfd_size_type sec_size;
11234 sec_size = bfd_get_section_limit (abfd, sec);
11236 /* ".plt*" sections have no explicit relocations but they contain L32R
11237 instructions that reference the corresponding ".got.plt*" sections. */
11238 if ((sec->flags & SEC_LINKER_CREATED) != 0
11239 && CONST_STRNEQ (sec->name, ".plt"))
11243 /* Find the corresponding ".got.plt*" section. */
11244 if (sec->name[4] == '\0')
11245 sgotplt = elf_hash_table (link_info)->sgotplt;
11251 BFD_ASSERT (sec->name[4] == '.');
11252 chunk = strtol (&sec->name[5], NULL, 10);
11254 sprintf (got_name, ".got.plt.%u", chunk);
11255 sgotplt = bfd_get_linker_section (sec->owner, got_name);
11257 BFD_ASSERT (sgotplt);
11259 /* Assume worst-case offsets: L32R at the very end of the ".plt"
11260 section referencing a literal at the very beginning of
11261 ".got.plt". This is very close to the real dependence, anyway. */
11262 (*callback) (sec, sec_size, sgotplt, 0, closure);
11265 /* Only ELF files are supported for Xtensa. Check here to avoid a segfault
11266 when building uclibc, which runs "ld -b binary /dev/null". */
11267 if (bfd_get_flavour (abfd) != bfd_target_elf_flavour)
11270 internal_relocs = retrieve_internal_relocs (abfd, sec,
11271 link_info->keep_memory);
11272 if (internal_relocs == NULL
11273 || sec->reloc_count == 0)
11276 /* Cache the contents for the duration of this scan. */
11277 contents = retrieve_contents (abfd, sec, link_info->keep_memory);
11278 if (contents == NULL && sec_size != 0)
11284 if (!xtensa_default_isa)
11285 xtensa_default_isa = xtensa_isa_init (0, 0);
11287 for (i = 0; i < sec->reloc_count; i++)
11289 Elf_Internal_Rela *irel = &internal_relocs[i];
11290 if (is_l32r_relocation (abfd, sec, contents, irel))
11293 asection *target_sec;
11294 bfd_vma target_offset;
11296 r_reloc_init (&l32r_rel, abfd, irel, contents, sec_size);
11299 /* L32Rs must be local to the input file. */
11300 if (r_reloc_is_defined (&l32r_rel))
11302 target_sec = r_reloc_get_section (&l32r_rel);
11303 target_offset = l32r_rel.target_offset;
11305 (*callback) (sec, irel->r_offset, target_sec, target_offset,
11311 release_internal_relocs (sec, internal_relocs);
11312 release_contents (sec, contents);
11316 /* The default literal sections should always be marked as "code" (i.e.,
11317 SHF_EXECINSTR). This is particularly important for the Linux kernel
11318 module loader so that the literals are not placed after the text. */
11319 static const struct bfd_elf_special_section elf_xtensa_special_sections[] =
11321 { STRING_COMMA_LEN (".fini.literal"), 0, SHT_PROGBITS, SHF_ALLOC + SHF_EXECINSTR },
11322 { STRING_COMMA_LEN (".init.literal"), 0, SHT_PROGBITS, SHF_ALLOC + SHF_EXECINSTR },
11323 { STRING_COMMA_LEN (".literal"), 0, SHT_PROGBITS, SHF_ALLOC + SHF_EXECINSTR },
11324 { STRING_COMMA_LEN (".xtensa.info"), 0, SHT_NOTE, 0 },
11325 { NULL, 0, 0, 0, 0 }
11328 #define ELF_TARGET_ID XTENSA_ELF_DATA
11330 #define TARGET_LITTLE_SYM xtensa_elf32_le_vec
11331 #define TARGET_LITTLE_NAME "elf32-xtensa-le"
11332 #define TARGET_BIG_SYM xtensa_elf32_be_vec
11333 #define TARGET_BIG_NAME "elf32-xtensa-be"
11334 #define ELF_ARCH bfd_arch_xtensa
11336 #define ELF_MACHINE_CODE EM_XTENSA
11337 #define ELF_MACHINE_ALT1 EM_XTENSA_OLD
11339 #define ELF_MAXPAGESIZE 0x1000
11340 #endif /* ELF_ARCH */
11342 #define elf_backend_can_gc_sections 1
11343 #define elf_backend_can_refcount 1
11344 #define elf_backend_plt_readonly 1
11345 #define elf_backend_got_header_size 4
11346 #define elf_backend_want_dynbss 0
11347 #define elf_backend_want_got_plt 1
11348 #define elf_backend_dtrel_excludes_plt 1
11350 #define elf_info_to_howto elf_xtensa_info_to_howto_rela
11352 #define bfd_elf32_mkobject elf_xtensa_mkobject
11354 #define bfd_elf32_bfd_merge_private_bfd_data elf_xtensa_merge_private_bfd_data
11355 #define bfd_elf32_new_section_hook elf_xtensa_new_section_hook
11356 #define bfd_elf32_bfd_print_private_bfd_data elf_xtensa_print_private_bfd_data
11357 #define bfd_elf32_bfd_relax_section elf_xtensa_relax_section
11358 #define bfd_elf32_bfd_reloc_type_lookup elf_xtensa_reloc_type_lookup
11359 #define bfd_elf32_bfd_reloc_name_lookup \
11360 elf_xtensa_reloc_name_lookup
11361 #define bfd_elf32_bfd_set_private_flags elf_xtensa_set_private_flags
11362 #define bfd_elf32_bfd_link_hash_table_create elf_xtensa_link_hash_table_create
11364 #define elf_backend_adjust_dynamic_symbol elf_xtensa_adjust_dynamic_symbol
11365 #define elf_backend_check_relocs elf_xtensa_check_relocs
11366 #define elf_backend_create_dynamic_sections elf_xtensa_create_dynamic_sections
11367 #define elf_backend_discard_info elf_xtensa_discard_info
11368 #define elf_backend_ignore_discarded_relocs elf_xtensa_ignore_discarded_relocs
11369 #define elf_backend_final_write_processing elf_xtensa_final_write_processing
11370 #define elf_backend_finish_dynamic_sections elf_xtensa_finish_dynamic_sections
11371 #define elf_backend_finish_dynamic_symbol elf_xtensa_finish_dynamic_symbol
11372 #define elf_backend_gc_mark_hook elf_xtensa_gc_mark_hook
11373 #define elf_backend_gc_sweep_hook elf_xtensa_gc_sweep_hook
11374 #define elf_backend_grok_prstatus elf_xtensa_grok_prstatus
11375 #define elf_backend_grok_psinfo elf_xtensa_grok_psinfo
11376 #define elf_backend_hide_symbol elf_xtensa_hide_symbol
11377 #define elf_backend_object_p elf_xtensa_object_p
11378 #define elf_backend_reloc_type_class elf_xtensa_reloc_type_class
11379 #define elf_backend_relocate_section elf_xtensa_relocate_section
11380 #define elf_backend_size_dynamic_sections elf_xtensa_size_dynamic_sections
11381 #define elf_backend_always_size_sections elf_xtensa_always_size_sections
11382 #define elf_backend_omit_section_dynsym \
11383 ((bfd_boolean (*) (bfd *, struct bfd_link_info *, asection *)) bfd_true)
11384 #define elf_backend_special_sections elf_xtensa_special_sections
11385 #define elf_backend_action_discarded elf_xtensa_action_discarded
11386 #define elf_backend_copy_indirect_symbol elf_xtensa_copy_indirect_symbol
11388 #include "elf32-target.h"