1 /* Xtensa-specific support for 32-bit ELF.
2 Copyright (C) 2003-2018 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 /* Place property records for a section into individual property section
158 with xt.prop. prefix. */
160 bfd_boolean elf32xtensa_separate_props = FALSE;
162 /* Rename one of the generic section flags to better document how it
164 /* Whether relocations have been processed. */
165 #define reloc_done sec_flg0
167 static reloc_howto_type elf_howto_table[] =
169 HOWTO (R_XTENSA_NONE, 0, 3, 0, FALSE, 0, complain_overflow_dont,
170 bfd_elf_xtensa_reloc, "R_XTENSA_NONE",
172 HOWTO (R_XTENSA_32, 0, 2, 32, FALSE, 0, complain_overflow_bitfield,
173 bfd_elf_xtensa_reloc, "R_XTENSA_32",
174 TRUE, 0xffffffff, 0xffffffff, FALSE),
176 /* Replace a 32-bit value with a value from the runtime linker (only
177 used by linker-generated stub functions). The r_addend value is
178 special: 1 means to substitute a pointer to the runtime linker's
179 dynamic resolver function; 2 means to substitute the link map for
180 the shared object. */
181 HOWTO (R_XTENSA_RTLD, 0, 2, 32, FALSE, 0, complain_overflow_dont,
182 NULL, "R_XTENSA_RTLD", FALSE, 0, 0, FALSE),
184 HOWTO (R_XTENSA_GLOB_DAT, 0, 2, 32, FALSE, 0, complain_overflow_bitfield,
185 bfd_elf_generic_reloc, "R_XTENSA_GLOB_DAT",
186 FALSE, 0, 0xffffffff, FALSE),
187 HOWTO (R_XTENSA_JMP_SLOT, 0, 2, 32, FALSE, 0, complain_overflow_bitfield,
188 bfd_elf_generic_reloc, "R_XTENSA_JMP_SLOT",
189 FALSE, 0, 0xffffffff, FALSE),
190 HOWTO (R_XTENSA_RELATIVE, 0, 2, 32, FALSE, 0, complain_overflow_bitfield,
191 bfd_elf_generic_reloc, "R_XTENSA_RELATIVE",
192 FALSE, 0, 0xffffffff, FALSE),
193 HOWTO (R_XTENSA_PLT, 0, 2, 32, FALSE, 0, complain_overflow_bitfield,
194 bfd_elf_xtensa_reloc, "R_XTENSA_PLT",
195 FALSE, 0, 0xffffffff, FALSE),
199 /* Old relocations for backward compatibility. */
200 HOWTO (R_XTENSA_OP0, 0, 0, 0, TRUE, 0, complain_overflow_dont,
201 bfd_elf_xtensa_reloc, "R_XTENSA_OP0", FALSE, 0, 0, TRUE),
202 HOWTO (R_XTENSA_OP1, 0, 0, 0, TRUE, 0, complain_overflow_dont,
203 bfd_elf_xtensa_reloc, "R_XTENSA_OP1", FALSE, 0, 0, TRUE),
204 HOWTO (R_XTENSA_OP2, 0, 0, 0, TRUE, 0, complain_overflow_dont,
205 bfd_elf_xtensa_reloc, "R_XTENSA_OP2", FALSE, 0, 0, TRUE),
207 /* Assembly auto-expansion. */
208 HOWTO (R_XTENSA_ASM_EXPAND, 0, 0, 0, TRUE, 0, complain_overflow_dont,
209 bfd_elf_xtensa_reloc, "R_XTENSA_ASM_EXPAND", FALSE, 0, 0, TRUE),
210 /* Relax assembly auto-expansion. */
211 HOWTO (R_XTENSA_ASM_SIMPLIFY, 0, 0, 0, TRUE, 0, complain_overflow_dont,
212 bfd_elf_xtensa_reloc, "R_XTENSA_ASM_SIMPLIFY", FALSE, 0, 0, TRUE),
216 HOWTO (R_XTENSA_32_PCREL, 0, 2, 32, TRUE, 0, complain_overflow_bitfield,
217 bfd_elf_xtensa_reloc, "R_XTENSA_32_PCREL",
218 FALSE, 0, 0xffffffff, TRUE),
220 /* GNU extension to record C++ vtable hierarchy. */
221 HOWTO (R_XTENSA_GNU_VTINHERIT, 0, 2, 0, FALSE, 0, complain_overflow_dont,
222 NULL, "R_XTENSA_GNU_VTINHERIT",
224 /* GNU extension to record C++ vtable member usage. */
225 HOWTO (R_XTENSA_GNU_VTENTRY, 0, 2, 0, FALSE, 0, complain_overflow_dont,
226 _bfd_elf_rel_vtable_reloc_fn, "R_XTENSA_GNU_VTENTRY",
229 /* Relocations for supporting difference of symbols. */
230 HOWTO (R_XTENSA_DIFF8, 0, 0, 8, FALSE, 0, complain_overflow_signed,
231 bfd_elf_xtensa_reloc, "R_XTENSA_DIFF8", FALSE, 0, 0xff, FALSE),
232 HOWTO (R_XTENSA_DIFF16, 0, 1, 16, FALSE, 0, complain_overflow_signed,
233 bfd_elf_xtensa_reloc, "R_XTENSA_DIFF16", FALSE, 0, 0xffff, FALSE),
234 HOWTO (R_XTENSA_DIFF32, 0, 2, 32, FALSE, 0, complain_overflow_signed,
235 bfd_elf_xtensa_reloc, "R_XTENSA_DIFF32", FALSE, 0, 0xffffffff, FALSE),
237 /* General immediate operand relocations. */
238 HOWTO (R_XTENSA_SLOT0_OP, 0, 0, 0, TRUE, 0, complain_overflow_dont,
239 bfd_elf_xtensa_reloc, "R_XTENSA_SLOT0_OP", FALSE, 0, 0, TRUE),
240 HOWTO (R_XTENSA_SLOT1_OP, 0, 0, 0, TRUE, 0, complain_overflow_dont,
241 bfd_elf_xtensa_reloc, "R_XTENSA_SLOT1_OP", FALSE, 0, 0, TRUE),
242 HOWTO (R_XTENSA_SLOT2_OP, 0, 0, 0, TRUE, 0, complain_overflow_dont,
243 bfd_elf_xtensa_reloc, "R_XTENSA_SLOT2_OP", FALSE, 0, 0, TRUE),
244 HOWTO (R_XTENSA_SLOT3_OP, 0, 0, 0, TRUE, 0, complain_overflow_dont,
245 bfd_elf_xtensa_reloc, "R_XTENSA_SLOT3_OP", FALSE, 0, 0, TRUE),
246 HOWTO (R_XTENSA_SLOT4_OP, 0, 0, 0, TRUE, 0, complain_overflow_dont,
247 bfd_elf_xtensa_reloc, "R_XTENSA_SLOT4_OP", FALSE, 0, 0, TRUE),
248 HOWTO (R_XTENSA_SLOT5_OP, 0, 0, 0, TRUE, 0, complain_overflow_dont,
249 bfd_elf_xtensa_reloc, "R_XTENSA_SLOT5_OP", FALSE, 0, 0, TRUE),
250 HOWTO (R_XTENSA_SLOT6_OP, 0, 0, 0, TRUE, 0, complain_overflow_dont,
251 bfd_elf_xtensa_reloc, "R_XTENSA_SLOT6_OP", FALSE, 0, 0, TRUE),
252 HOWTO (R_XTENSA_SLOT7_OP, 0, 0, 0, TRUE, 0, complain_overflow_dont,
253 bfd_elf_xtensa_reloc, "R_XTENSA_SLOT7_OP", FALSE, 0, 0, TRUE),
254 HOWTO (R_XTENSA_SLOT8_OP, 0, 0, 0, TRUE, 0, complain_overflow_dont,
255 bfd_elf_xtensa_reloc, "R_XTENSA_SLOT8_OP", FALSE, 0, 0, TRUE),
256 HOWTO (R_XTENSA_SLOT9_OP, 0, 0, 0, TRUE, 0, complain_overflow_dont,
257 bfd_elf_xtensa_reloc, "R_XTENSA_SLOT9_OP", FALSE, 0, 0, TRUE),
258 HOWTO (R_XTENSA_SLOT10_OP, 0, 0, 0, TRUE, 0, complain_overflow_dont,
259 bfd_elf_xtensa_reloc, "R_XTENSA_SLOT10_OP", FALSE, 0, 0, TRUE),
260 HOWTO (R_XTENSA_SLOT11_OP, 0, 0, 0, TRUE, 0, complain_overflow_dont,
261 bfd_elf_xtensa_reloc, "R_XTENSA_SLOT11_OP", FALSE, 0, 0, TRUE),
262 HOWTO (R_XTENSA_SLOT12_OP, 0, 0, 0, TRUE, 0, complain_overflow_dont,
263 bfd_elf_xtensa_reloc, "R_XTENSA_SLOT12_OP", FALSE, 0, 0, TRUE),
264 HOWTO (R_XTENSA_SLOT13_OP, 0, 0, 0, TRUE, 0, complain_overflow_dont,
265 bfd_elf_xtensa_reloc, "R_XTENSA_SLOT13_OP", FALSE, 0, 0, TRUE),
266 HOWTO (R_XTENSA_SLOT14_OP, 0, 0, 0, TRUE, 0, complain_overflow_dont,
267 bfd_elf_xtensa_reloc, "R_XTENSA_SLOT14_OP", FALSE, 0, 0, TRUE),
269 /* "Alternate" relocations. The meaning of these is opcode-specific. */
270 HOWTO (R_XTENSA_SLOT0_ALT, 0, 0, 0, TRUE, 0, complain_overflow_dont,
271 bfd_elf_xtensa_reloc, "R_XTENSA_SLOT0_ALT", FALSE, 0, 0, TRUE),
272 HOWTO (R_XTENSA_SLOT1_ALT, 0, 0, 0, TRUE, 0, complain_overflow_dont,
273 bfd_elf_xtensa_reloc, "R_XTENSA_SLOT1_ALT", FALSE, 0, 0, TRUE),
274 HOWTO (R_XTENSA_SLOT2_ALT, 0, 0, 0, TRUE, 0, complain_overflow_dont,
275 bfd_elf_xtensa_reloc, "R_XTENSA_SLOT2_ALT", FALSE, 0, 0, TRUE),
276 HOWTO (R_XTENSA_SLOT3_ALT, 0, 0, 0, TRUE, 0, complain_overflow_dont,
277 bfd_elf_xtensa_reloc, "R_XTENSA_SLOT3_ALT", FALSE, 0, 0, TRUE),
278 HOWTO (R_XTENSA_SLOT4_ALT, 0, 0, 0, TRUE, 0, complain_overflow_dont,
279 bfd_elf_xtensa_reloc, "R_XTENSA_SLOT4_ALT", FALSE, 0, 0, TRUE),
280 HOWTO (R_XTENSA_SLOT5_ALT, 0, 0, 0, TRUE, 0, complain_overflow_dont,
281 bfd_elf_xtensa_reloc, "R_XTENSA_SLOT5_ALT", FALSE, 0, 0, TRUE),
282 HOWTO (R_XTENSA_SLOT6_ALT, 0, 0, 0, TRUE, 0, complain_overflow_dont,
283 bfd_elf_xtensa_reloc, "R_XTENSA_SLOT6_ALT", FALSE, 0, 0, TRUE),
284 HOWTO (R_XTENSA_SLOT7_ALT, 0, 0, 0, TRUE, 0, complain_overflow_dont,
285 bfd_elf_xtensa_reloc, "R_XTENSA_SLOT7_ALT", FALSE, 0, 0, TRUE),
286 HOWTO (R_XTENSA_SLOT8_ALT, 0, 0, 0, TRUE, 0, complain_overflow_dont,
287 bfd_elf_xtensa_reloc, "R_XTENSA_SLOT8_ALT", FALSE, 0, 0, TRUE),
288 HOWTO (R_XTENSA_SLOT9_ALT, 0, 0, 0, TRUE, 0, complain_overflow_dont,
289 bfd_elf_xtensa_reloc, "R_XTENSA_SLOT9_ALT", FALSE, 0, 0, TRUE),
290 HOWTO (R_XTENSA_SLOT10_ALT, 0, 0, 0, TRUE, 0, complain_overflow_dont,
291 bfd_elf_xtensa_reloc, "R_XTENSA_SLOT10_ALT", FALSE, 0, 0, TRUE),
292 HOWTO (R_XTENSA_SLOT11_ALT, 0, 0, 0, TRUE, 0, complain_overflow_dont,
293 bfd_elf_xtensa_reloc, "R_XTENSA_SLOT11_ALT", FALSE, 0, 0, TRUE),
294 HOWTO (R_XTENSA_SLOT12_ALT, 0, 0, 0, TRUE, 0, complain_overflow_dont,
295 bfd_elf_xtensa_reloc, "R_XTENSA_SLOT12_ALT", FALSE, 0, 0, TRUE),
296 HOWTO (R_XTENSA_SLOT13_ALT, 0, 0, 0, TRUE, 0, complain_overflow_dont,
297 bfd_elf_xtensa_reloc, "R_XTENSA_SLOT13_ALT", FALSE, 0, 0, TRUE),
298 HOWTO (R_XTENSA_SLOT14_ALT, 0, 0, 0, TRUE, 0, complain_overflow_dont,
299 bfd_elf_xtensa_reloc, "R_XTENSA_SLOT14_ALT", FALSE, 0, 0, TRUE),
301 /* TLS relocations. */
302 HOWTO (R_XTENSA_TLSDESC_FN, 0, 2, 32, FALSE, 0, complain_overflow_dont,
303 bfd_elf_xtensa_reloc, "R_XTENSA_TLSDESC_FN",
304 FALSE, 0, 0xffffffff, FALSE),
305 HOWTO (R_XTENSA_TLSDESC_ARG, 0, 2, 32, FALSE, 0, complain_overflow_dont,
306 bfd_elf_xtensa_reloc, "R_XTENSA_TLSDESC_ARG",
307 FALSE, 0, 0xffffffff, FALSE),
308 HOWTO (R_XTENSA_TLS_DTPOFF, 0, 2, 32, FALSE, 0, complain_overflow_dont,
309 bfd_elf_xtensa_reloc, "R_XTENSA_TLS_DTPOFF",
310 FALSE, 0, 0xffffffff, FALSE),
311 HOWTO (R_XTENSA_TLS_TPOFF, 0, 2, 32, FALSE, 0, complain_overflow_dont,
312 bfd_elf_xtensa_reloc, "R_XTENSA_TLS_TPOFF",
313 FALSE, 0, 0xffffffff, FALSE),
314 HOWTO (R_XTENSA_TLS_FUNC, 0, 0, 0, FALSE, 0, complain_overflow_dont,
315 bfd_elf_xtensa_reloc, "R_XTENSA_TLS_FUNC",
317 HOWTO (R_XTENSA_TLS_ARG, 0, 0, 0, FALSE, 0, complain_overflow_dont,
318 bfd_elf_xtensa_reloc, "R_XTENSA_TLS_ARG",
320 HOWTO (R_XTENSA_TLS_CALL, 0, 0, 0, FALSE, 0, complain_overflow_dont,
321 bfd_elf_xtensa_reloc, "R_XTENSA_TLS_CALL",
327 fprintf (stderr, "Xtensa bfd reloc lookup %d (%s)\n", code, str)
332 static reloc_howto_type *
333 elf_xtensa_reloc_type_lookup (bfd *abfd ATTRIBUTE_UNUSED,
334 bfd_reloc_code_real_type code)
339 TRACE ("BFD_RELOC_NONE");
340 return &elf_howto_table[(unsigned) R_XTENSA_NONE ];
343 TRACE ("BFD_RELOC_32");
344 return &elf_howto_table[(unsigned) R_XTENSA_32 ];
346 case BFD_RELOC_32_PCREL:
347 TRACE ("BFD_RELOC_32_PCREL");
348 return &elf_howto_table[(unsigned) R_XTENSA_32_PCREL ];
350 case BFD_RELOC_XTENSA_DIFF8:
351 TRACE ("BFD_RELOC_XTENSA_DIFF8");
352 return &elf_howto_table[(unsigned) R_XTENSA_DIFF8 ];
354 case BFD_RELOC_XTENSA_DIFF16:
355 TRACE ("BFD_RELOC_XTENSA_DIFF16");
356 return &elf_howto_table[(unsigned) R_XTENSA_DIFF16 ];
358 case BFD_RELOC_XTENSA_DIFF32:
359 TRACE ("BFD_RELOC_XTENSA_DIFF32");
360 return &elf_howto_table[(unsigned) R_XTENSA_DIFF32 ];
362 case BFD_RELOC_XTENSA_RTLD:
363 TRACE ("BFD_RELOC_XTENSA_RTLD");
364 return &elf_howto_table[(unsigned) R_XTENSA_RTLD ];
366 case BFD_RELOC_XTENSA_GLOB_DAT:
367 TRACE ("BFD_RELOC_XTENSA_GLOB_DAT");
368 return &elf_howto_table[(unsigned) R_XTENSA_GLOB_DAT ];
370 case BFD_RELOC_XTENSA_JMP_SLOT:
371 TRACE ("BFD_RELOC_XTENSA_JMP_SLOT");
372 return &elf_howto_table[(unsigned) R_XTENSA_JMP_SLOT ];
374 case BFD_RELOC_XTENSA_RELATIVE:
375 TRACE ("BFD_RELOC_XTENSA_RELATIVE");
376 return &elf_howto_table[(unsigned) R_XTENSA_RELATIVE ];
378 case BFD_RELOC_XTENSA_PLT:
379 TRACE ("BFD_RELOC_XTENSA_PLT");
380 return &elf_howto_table[(unsigned) R_XTENSA_PLT ];
382 case BFD_RELOC_XTENSA_OP0:
383 TRACE ("BFD_RELOC_XTENSA_OP0");
384 return &elf_howto_table[(unsigned) R_XTENSA_OP0 ];
386 case BFD_RELOC_XTENSA_OP1:
387 TRACE ("BFD_RELOC_XTENSA_OP1");
388 return &elf_howto_table[(unsigned) R_XTENSA_OP1 ];
390 case BFD_RELOC_XTENSA_OP2:
391 TRACE ("BFD_RELOC_XTENSA_OP2");
392 return &elf_howto_table[(unsigned) R_XTENSA_OP2 ];
394 case BFD_RELOC_XTENSA_ASM_EXPAND:
395 TRACE ("BFD_RELOC_XTENSA_ASM_EXPAND");
396 return &elf_howto_table[(unsigned) R_XTENSA_ASM_EXPAND ];
398 case BFD_RELOC_XTENSA_ASM_SIMPLIFY:
399 TRACE ("BFD_RELOC_XTENSA_ASM_SIMPLIFY");
400 return &elf_howto_table[(unsigned) R_XTENSA_ASM_SIMPLIFY ];
402 case BFD_RELOC_VTABLE_INHERIT:
403 TRACE ("BFD_RELOC_VTABLE_INHERIT");
404 return &elf_howto_table[(unsigned) R_XTENSA_GNU_VTINHERIT ];
406 case BFD_RELOC_VTABLE_ENTRY:
407 TRACE ("BFD_RELOC_VTABLE_ENTRY");
408 return &elf_howto_table[(unsigned) R_XTENSA_GNU_VTENTRY ];
410 case BFD_RELOC_XTENSA_TLSDESC_FN:
411 TRACE ("BFD_RELOC_XTENSA_TLSDESC_FN");
412 return &elf_howto_table[(unsigned) R_XTENSA_TLSDESC_FN ];
414 case BFD_RELOC_XTENSA_TLSDESC_ARG:
415 TRACE ("BFD_RELOC_XTENSA_TLSDESC_ARG");
416 return &elf_howto_table[(unsigned) R_XTENSA_TLSDESC_ARG ];
418 case BFD_RELOC_XTENSA_TLS_DTPOFF:
419 TRACE ("BFD_RELOC_XTENSA_TLS_DTPOFF");
420 return &elf_howto_table[(unsigned) R_XTENSA_TLS_DTPOFF ];
422 case BFD_RELOC_XTENSA_TLS_TPOFF:
423 TRACE ("BFD_RELOC_XTENSA_TLS_TPOFF");
424 return &elf_howto_table[(unsigned) R_XTENSA_TLS_TPOFF ];
426 case BFD_RELOC_XTENSA_TLS_FUNC:
427 TRACE ("BFD_RELOC_XTENSA_TLS_FUNC");
428 return &elf_howto_table[(unsigned) R_XTENSA_TLS_FUNC ];
430 case BFD_RELOC_XTENSA_TLS_ARG:
431 TRACE ("BFD_RELOC_XTENSA_TLS_ARG");
432 return &elf_howto_table[(unsigned) R_XTENSA_TLS_ARG ];
434 case BFD_RELOC_XTENSA_TLS_CALL:
435 TRACE ("BFD_RELOC_XTENSA_TLS_CALL");
436 return &elf_howto_table[(unsigned) R_XTENSA_TLS_CALL ];
439 if (code >= BFD_RELOC_XTENSA_SLOT0_OP
440 && code <= BFD_RELOC_XTENSA_SLOT14_OP)
442 unsigned n = (R_XTENSA_SLOT0_OP +
443 (code - BFD_RELOC_XTENSA_SLOT0_OP));
444 return &elf_howto_table[n];
447 if (code >= BFD_RELOC_XTENSA_SLOT0_ALT
448 && code <= BFD_RELOC_XTENSA_SLOT14_ALT)
450 unsigned n = (R_XTENSA_SLOT0_ALT +
451 (code - BFD_RELOC_XTENSA_SLOT0_ALT));
452 return &elf_howto_table[n];
458 /* xgettext:c-format */
459 _bfd_error_handler (_("%pB: unsupported relocation type %#x"), abfd, (int) code);
460 bfd_set_error (bfd_error_bad_value);
465 static reloc_howto_type *
466 elf_xtensa_reloc_name_lookup (bfd *abfd ATTRIBUTE_UNUSED,
471 for (i = 0; i < sizeof (elf_howto_table) / sizeof (elf_howto_table[0]); i++)
472 if (elf_howto_table[i].name != NULL
473 && strcasecmp (elf_howto_table[i].name, r_name) == 0)
474 return &elf_howto_table[i];
480 /* Given an ELF "rela" relocation, find the corresponding howto and record
481 it in the BFD internal arelent representation of the relocation. */
484 elf_xtensa_info_to_howto_rela (bfd *abfd,
486 Elf_Internal_Rela *dst)
488 unsigned int r_type = ELF32_R_TYPE (dst->r_info);
490 if (r_type >= (unsigned int) R_XTENSA_max)
492 /* xgettext:c-format */
493 _bfd_error_handler (_("%pB: unsupported relocation type %#x"),
495 bfd_set_error (bfd_error_bad_value);
498 cache_ptr->howto = &elf_howto_table[r_type];
503 /* Functions for the Xtensa ELF linker. */
505 /* The name of the dynamic interpreter. This is put in the .interp
508 #define ELF_DYNAMIC_INTERPRETER "/lib/ld.so"
510 /* The size in bytes of an entry in the procedure linkage table.
511 (This does _not_ include the space for the literals associated with
514 #define PLT_ENTRY_SIZE 16
516 /* For _really_ large PLTs, we may need to alternate between literals
517 and code to keep the literals within the 256K range of the L32R
518 instructions in the code. It's unlikely that anyone would ever need
519 such a big PLT, but an arbitrary limit on the PLT size would be bad.
520 Thus, we split the PLT into chunks. Since there's very little
521 overhead (2 extra literals) for each chunk, the chunk size is kept
522 small so that the code for handling multiple chunks get used and
523 tested regularly. With 254 entries, there are 1K of literals for
524 each chunk, and that seems like a nice round number. */
526 #define PLT_ENTRIES_PER_CHUNK 254
528 /* PLT entries are actually used as stub functions for lazy symbol
529 resolution. Once the symbol is resolved, the stub function is never
530 invoked. Note: the 32-byte frame size used here cannot be changed
531 without a corresponding change in the runtime linker. */
533 static const bfd_byte elf_xtensa_be_plt_entry[][PLT_ENTRY_SIZE] =
536 0x6c, 0x10, 0x04, /* entry sp, 32 */
537 0x18, 0x00, 0x00, /* l32r a8, [got entry for rtld's resolver] */
538 0x1a, 0x00, 0x00, /* l32r a10, [got entry for rtld's link map] */
539 0x1b, 0x00, 0x00, /* l32r a11, [literal for reloc index] */
540 0x0a, 0x80, 0x00, /* jx a8 */
544 0x18, 0x00, 0x00, /* l32r a8, [got entry for rtld's resolver] */
545 0x1a, 0x00, 0x00, /* l32r a10, [got entry for rtld's link map] */
546 0x1b, 0x00, 0x00, /* l32r a11, [literal for reloc index] */
547 0x0a, 0x80, 0x00, /* jx a8 */
552 static const bfd_byte elf_xtensa_le_plt_entry[][PLT_ENTRY_SIZE] =
555 0x36, 0x41, 0x00, /* entry sp, 32 */
556 0x81, 0x00, 0x00, /* l32r a8, [got entry for rtld's resolver] */
557 0xa1, 0x00, 0x00, /* l32r a10, [got entry for rtld's link map] */
558 0xb1, 0x00, 0x00, /* l32r a11, [literal for reloc index] */
559 0xa0, 0x08, 0x00, /* jx a8 */
563 0x81, 0x00, 0x00, /* l32r a8, [got entry for rtld's resolver] */
564 0xa1, 0x00, 0x00, /* l32r a10, [got entry for rtld's link map] */
565 0xb1, 0x00, 0x00, /* l32r a11, [literal for reloc index] */
566 0xa0, 0x08, 0x00, /* jx a8 */
571 /* The size of the thread control block. */
574 struct elf_xtensa_link_hash_entry
576 struct elf_link_hash_entry elf;
578 bfd_signed_vma tlsfunc_refcount;
580 #define GOT_UNKNOWN 0
582 #define GOT_TLS_GD 2 /* global or local dynamic */
583 #define GOT_TLS_IE 4 /* initial or local exec */
584 #define GOT_TLS_ANY (GOT_TLS_GD | GOT_TLS_IE)
585 unsigned char tls_type;
588 #define elf_xtensa_hash_entry(ent) ((struct elf_xtensa_link_hash_entry *)(ent))
590 struct elf_xtensa_obj_tdata
592 struct elf_obj_tdata root;
594 /* tls_type for each local got entry. */
595 char *local_got_tls_type;
597 bfd_signed_vma *local_tlsfunc_refcounts;
600 #define elf_xtensa_tdata(abfd) \
601 ((struct elf_xtensa_obj_tdata *) (abfd)->tdata.any)
603 #define elf_xtensa_local_got_tls_type(abfd) \
604 (elf_xtensa_tdata (abfd)->local_got_tls_type)
606 #define elf_xtensa_local_tlsfunc_refcounts(abfd) \
607 (elf_xtensa_tdata (abfd)->local_tlsfunc_refcounts)
609 #define is_xtensa_elf(bfd) \
610 (bfd_get_flavour (bfd) == bfd_target_elf_flavour \
611 && elf_tdata (bfd) != NULL \
612 && elf_object_id (bfd) == XTENSA_ELF_DATA)
615 elf_xtensa_mkobject (bfd *abfd)
617 return bfd_elf_allocate_object (abfd, sizeof (struct elf_xtensa_obj_tdata),
621 /* Xtensa ELF linker hash table. */
623 struct elf_xtensa_link_hash_table
625 struct elf_link_hash_table elf;
627 /* Short-cuts to get to dynamic linker sections. */
629 asection *spltlittbl;
631 /* Total count of PLT relocations seen during check_relocs.
632 The actual PLT code must be split into multiple sections and all
633 the sections have to be created before size_dynamic_sections,
634 where we figure out the exact number of PLT entries that will be
635 needed. It is OK if this count is an overestimate, e.g., some
636 relocations may be removed by GC. */
639 struct elf_xtensa_link_hash_entry *tlsbase;
642 /* Get the Xtensa ELF linker hash table from a link_info structure. */
644 #define elf_xtensa_hash_table(p) \
645 (elf_hash_table_id ((struct elf_link_hash_table *) ((p)->hash)) \
646 == XTENSA_ELF_DATA ? ((struct elf_xtensa_link_hash_table *) ((p)->hash)) : NULL)
648 /* Create an entry in an Xtensa ELF linker hash table. */
650 static struct bfd_hash_entry *
651 elf_xtensa_link_hash_newfunc (struct bfd_hash_entry *entry,
652 struct bfd_hash_table *table,
655 /* Allocate the structure if it has not already been allocated by a
659 entry = bfd_hash_allocate (table,
660 sizeof (struct elf_xtensa_link_hash_entry));
665 /* Call the allocation method of the superclass. */
666 entry = _bfd_elf_link_hash_newfunc (entry, table, string);
669 struct elf_xtensa_link_hash_entry *eh = elf_xtensa_hash_entry (entry);
670 eh->tlsfunc_refcount = 0;
671 eh->tls_type = GOT_UNKNOWN;
677 /* Create an Xtensa ELF linker hash table. */
679 static struct bfd_link_hash_table *
680 elf_xtensa_link_hash_table_create (bfd *abfd)
682 struct elf_link_hash_entry *tlsbase;
683 struct elf_xtensa_link_hash_table *ret;
684 bfd_size_type amt = sizeof (struct elf_xtensa_link_hash_table);
686 ret = bfd_zmalloc (amt);
690 if (!_bfd_elf_link_hash_table_init (&ret->elf, abfd,
691 elf_xtensa_link_hash_newfunc,
692 sizeof (struct elf_xtensa_link_hash_entry),
699 /* Create a hash entry for "_TLS_MODULE_BASE_" to speed up checking
701 tlsbase = elf_link_hash_lookup (&ret->elf, "_TLS_MODULE_BASE_",
703 tlsbase->root.type = bfd_link_hash_new;
704 tlsbase->root.u.undef.abfd = NULL;
705 tlsbase->non_elf = 0;
706 ret->tlsbase = elf_xtensa_hash_entry (tlsbase);
707 ret->tlsbase->tls_type = GOT_UNKNOWN;
709 return &ret->elf.root;
712 /* Copy the extra info we tack onto an elf_link_hash_entry. */
715 elf_xtensa_copy_indirect_symbol (struct bfd_link_info *info,
716 struct elf_link_hash_entry *dir,
717 struct elf_link_hash_entry *ind)
719 struct elf_xtensa_link_hash_entry *edir, *eind;
721 edir = elf_xtensa_hash_entry (dir);
722 eind = elf_xtensa_hash_entry (ind);
724 if (ind->root.type == bfd_link_hash_indirect)
726 edir->tlsfunc_refcount += eind->tlsfunc_refcount;
727 eind->tlsfunc_refcount = 0;
729 if (dir->got.refcount <= 0)
731 edir->tls_type = eind->tls_type;
732 eind->tls_type = GOT_UNKNOWN;
736 _bfd_elf_link_hash_copy_indirect (info, dir, ind);
739 static inline bfd_boolean
740 elf_xtensa_dynamic_symbol_p (struct elf_link_hash_entry *h,
741 struct bfd_link_info *info)
743 /* Check if we should do dynamic things to this symbol. The
744 "ignore_protected" argument need not be set, because Xtensa code
745 does not require special handling of STV_PROTECTED to make function
746 pointer comparisons work properly. The PLT addresses are never
747 used for function pointers. */
749 return _bfd_elf_dynamic_symbol_p (h, info, 0);
754 property_table_compare (const void *ap, const void *bp)
756 const property_table_entry *a = (const property_table_entry *) ap;
757 const property_table_entry *b = (const property_table_entry *) bp;
759 if (a->address == b->address)
761 if (a->size != b->size)
762 return (a->size - b->size);
764 if ((a->flags & XTENSA_PROP_ALIGN) != (b->flags & XTENSA_PROP_ALIGN))
765 return ((b->flags & XTENSA_PROP_ALIGN)
766 - (a->flags & XTENSA_PROP_ALIGN));
768 if ((a->flags & XTENSA_PROP_ALIGN)
769 && (GET_XTENSA_PROP_ALIGNMENT (a->flags)
770 != GET_XTENSA_PROP_ALIGNMENT (b->flags)))
771 return (GET_XTENSA_PROP_ALIGNMENT (a->flags)
772 - GET_XTENSA_PROP_ALIGNMENT (b->flags));
774 if ((a->flags & XTENSA_PROP_UNREACHABLE)
775 != (b->flags & XTENSA_PROP_UNREACHABLE))
776 return ((b->flags & XTENSA_PROP_UNREACHABLE)
777 - (a->flags & XTENSA_PROP_UNREACHABLE));
779 return (a->flags - b->flags);
782 return (a->address - b->address);
787 property_table_matches (const void *ap, const void *bp)
789 const property_table_entry *a = (const property_table_entry *) ap;
790 const property_table_entry *b = (const property_table_entry *) bp;
792 /* Check if one entry overlaps with the other. */
793 if ((b->address >= a->address && b->address < (a->address + a->size))
794 || (a->address >= b->address && a->address < (b->address + b->size)))
797 return (a->address - b->address);
801 /* Get the literal table or property table entries for the given
802 section. Sets TABLE_P and returns the number of entries. On
803 error, returns a negative value. */
806 xtensa_read_table_entries (bfd *abfd,
808 property_table_entry **table_p,
809 const char *sec_name,
810 bfd_boolean output_addr)
812 asection *table_section;
813 bfd_size_type table_size = 0;
814 bfd_byte *table_data;
815 property_table_entry *blocks;
816 int blk, block_count;
817 bfd_size_type num_records;
818 Elf_Internal_Rela *internal_relocs, *irel, *rel_end;
819 bfd_vma section_addr, off;
820 flagword predef_flags;
821 bfd_size_type table_entry_size, section_limit;
824 || !(section->flags & SEC_ALLOC)
825 || (section->flags & SEC_DEBUGGING))
831 table_section = xtensa_get_property_section (section, sec_name);
833 table_size = table_section->size;
841 predef_flags = xtensa_get_property_predef_flags (table_section);
842 table_entry_size = 12;
844 table_entry_size -= 4;
846 num_records = table_size / table_entry_size;
847 table_data = retrieve_contents (abfd, table_section, TRUE);
848 blocks = (property_table_entry *)
849 bfd_malloc (num_records * sizeof (property_table_entry));
853 section_addr = section->output_section->vma + section->output_offset;
855 section_addr = section->vma;
857 internal_relocs = retrieve_internal_relocs (abfd, table_section, TRUE);
858 if (internal_relocs && !table_section->reloc_done)
860 qsort (internal_relocs, table_section->reloc_count,
861 sizeof (Elf_Internal_Rela), internal_reloc_compare);
862 irel = internal_relocs;
867 section_limit = bfd_get_section_limit (abfd, section);
868 rel_end = internal_relocs + table_section->reloc_count;
870 for (off = 0; off < table_size; off += table_entry_size)
872 bfd_vma address = bfd_get_32 (abfd, table_data + off);
874 /* Skip any relocations before the current offset. This should help
875 avoid confusion caused by unexpected relocations for the preceding
878 (irel->r_offset < off
879 || (irel->r_offset == off
880 && ELF32_R_TYPE (irel->r_info) == R_XTENSA_NONE)))
887 if (irel && irel->r_offset == off)
890 unsigned long r_symndx = ELF32_R_SYM (irel->r_info);
891 BFD_ASSERT (ELF32_R_TYPE (irel->r_info) == R_XTENSA_32);
893 if (get_elf_r_symndx_section (abfd, r_symndx) != section)
896 sym_off = get_elf_r_symndx_offset (abfd, r_symndx);
897 BFD_ASSERT (sym_off == 0);
898 address += (section_addr + sym_off + irel->r_addend);
902 if (address < section_addr
903 || address >= section_addr + section_limit)
907 blocks[block_count].address = address;
908 blocks[block_count].size = bfd_get_32 (abfd, table_data + off + 4);
910 blocks[block_count].flags = predef_flags;
912 blocks[block_count].flags = bfd_get_32 (abfd, table_data + off + 8);
916 release_contents (table_section, table_data);
917 release_internal_relocs (table_section, internal_relocs);
921 /* Now sort them into address order for easy reference. */
922 qsort (blocks, block_count, sizeof (property_table_entry),
923 property_table_compare);
925 /* Check that the table contents are valid. Problems may occur,
926 for example, if an unrelocated object file is stripped. */
927 for (blk = 1; blk < block_count; blk++)
929 /* The only circumstance where two entries may legitimately
930 have the same address is when one of them is a zero-size
931 placeholder to mark a place where fill can be inserted.
932 The zero-size entry should come first. */
933 if (blocks[blk - 1].address == blocks[blk].address &&
934 blocks[blk - 1].size != 0)
936 /* xgettext:c-format */
937 _bfd_error_handler (_("%pB(%pA): invalid property table"),
939 bfd_set_error (bfd_error_bad_value);
951 static property_table_entry *
952 elf_xtensa_find_property_entry (property_table_entry *property_table,
953 int property_table_size,
956 property_table_entry entry;
957 property_table_entry *rv;
959 if (property_table_size == 0)
962 entry.address = addr;
966 rv = bsearch (&entry, property_table, property_table_size,
967 sizeof (property_table_entry), property_table_matches);
973 elf_xtensa_in_literal_pool (property_table_entry *lit_table,
977 if (elf_xtensa_find_property_entry (lit_table, lit_table_size, addr))
984 /* Look through the relocs for a section during the first phase, and
985 calculate needed space in the dynamic reloc sections. */
988 elf_xtensa_check_relocs (bfd *abfd,
989 struct bfd_link_info *info,
991 const Elf_Internal_Rela *relocs)
993 struct elf_xtensa_link_hash_table *htab;
994 Elf_Internal_Shdr *symtab_hdr;
995 struct elf_link_hash_entry **sym_hashes;
996 const Elf_Internal_Rela *rel;
997 const Elf_Internal_Rela *rel_end;
999 if (bfd_link_relocatable (info) || (sec->flags & SEC_ALLOC) == 0)
1002 BFD_ASSERT (is_xtensa_elf (abfd));
1004 htab = elf_xtensa_hash_table (info);
1008 symtab_hdr = &elf_tdata (abfd)->symtab_hdr;
1009 sym_hashes = elf_sym_hashes (abfd);
1011 rel_end = relocs + sec->reloc_count;
1012 for (rel = relocs; rel < rel_end; rel++)
1014 unsigned int r_type;
1016 struct elf_link_hash_entry *h = NULL;
1017 struct elf_xtensa_link_hash_entry *eh;
1018 int tls_type, old_tls_type;
1019 bfd_boolean is_got = FALSE;
1020 bfd_boolean is_plt = FALSE;
1021 bfd_boolean is_tlsfunc = FALSE;
1023 r_symndx = ELF32_R_SYM (rel->r_info);
1024 r_type = ELF32_R_TYPE (rel->r_info);
1026 if (r_symndx >= NUM_SHDR_ENTRIES (symtab_hdr))
1028 /* xgettext:c-format */
1029 _bfd_error_handler (_("%pB: bad symbol index: %d"),
1034 if (r_symndx >= symtab_hdr->sh_info)
1036 h = sym_hashes[r_symndx - symtab_hdr->sh_info];
1037 while (h->root.type == bfd_link_hash_indirect
1038 || h->root.type == bfd_link_hash_warning)
1039 h = (struct elf_link_hash_entry *) h->root.u.i.link;
1041 eh = elf_xtensa_hash_entry (h);
1045 case R_XTENSA_TLSDESC_FN:
1046 if (bfd_link_pic (info))
1048 tls_type = GOT_TLS_GD;
1053 tls_type = GOT_TLS_IE;
1056 case R_XTENSA_TLSDESC_ARG:
1057 if (bfd_link_pic (info))
1059 tls_type = GOT_TLS_GD;
1064 tls_type = GOT_TLS_IE;
1065 if (h && elf_xtensa_hash_entry (h) != htab->tlsbase)
1070 case R_XTENSA_TLS_DTPOFF:
1071 if (bfd_link_pic (info))
1072 tls_type = GOT_TLS_GD;
1074 tls_type = GOT_TLS_IE;
1077 case R_XTENSA_TLS_TPOFF:
1078 tls_type = GOT_TLS_IE;
1079 if (bfd_link_pic (info))
1080 info->flags |= DF_STATIC_TLS;
1081 if (bfd_link_pic (info) || h)
1086 tls_type = GOT_NORMAL;
1091 tls_type = GOT_NORMAL;
1095 case R_XTENSA_GNU_VTINHERIT:
1096 /* This relocation describes the C++ object vtable hierarchy.
1097 Reconstruct it for later use during GC. */
1098 if (!bfd_elf_gc_record_vtinherit (abfd, sec, h, rel->r_offset))
1102 case R_XTENSA_GNU_VTENTRY:
1103 /* This relocation describes which C++ vtable entries are actually
1104 used. Record for later use during GC. */
1105 BFD_ASSERT (h != NULL);
1107 && !bfd_elf_gc_record_vtentry (abfd, sec, h, rel->r_addend))
1112 /* Nothing to do for any other relocations. */
1120 if (h->plt.refcount <= 0)
1123 h->plt.refcount = 1;
1126 h->plt.refcount += 1;
1128 /* Keep track of the total PLT relocation count even if we
1129 don't yet know whether the dynamic sections will be
1131 htab->plt_reloc_count += 1;
1133 if (elf_hash_table (info)->dynamic_sections_created)
1135 if (! add_extra_plt_sections (info, htab->plt_reloc_count))
1141 if (h->got.refcount <= 0)
1142 h->got.refcount = 1;
1144 h->got.refcount += 1;
1148 eh->tlsfunc_refcount += 1;
1150 old_tls_type = eh->tls_type;
1154 /* Allocate storage the first time. */
1155 if (elf_local_got_refcounts (abfd) == NULL)
1157 bfd_size_type size = symtab_hdr->sh_info;
1160 mem = bfd_zalloc (abfd, size * sizeof (bfd_signed_vma));
1163 elf_local_got_refcounts (abfd) = (bfd_signed_vma *) mem;
1165 mem = bfd_zalloc (abfd, size);
1168 elf_xtensa_local_got_tls_type (abfd) = (char *) mem;
1170 mem = bfd_zalloc (abfd, size * sizeof (bfd_signed_vma));
1173 elf_xtensa_local_tlsfunc_refcounts (abfd)
1174 = (bfd_signed_vma *) mem;
1177 /* This is a global offset table entry for a local symbol. */
1178 if (is_got || is_plt)
1179 elf_local_got_refcounts (abfd) [r_symndx] += 1;
1182 elf_xtensa_local_tlsfunc_refcounts (abfd) [r_symndx] += 1;
1184 old_tls_type = elf_xtensa_local_got_tls_type (abfd) [r_symndx];
1187 if ((old_tls_type & GOT_TLS_IE) && (tls_type & GOT_TLS_IE))
1188 tls_type |= old_tls_type;
1189 /* If a TLS symbol is accessed using IE at least once,
1190 there is no point to use a dynamic model for it. */
1191 else if (old_tls_type != tls_type && old_tls_type != GOT_UNKNOWN
1192 && ((old_tls_type & GOT_TLS_GD) == 0
1193 || (tls_type & GOT_TLS_IE) == 0))
1195 if ((old_tls_type & GOT_TLS_IE) && (tls_type & GOT_TLS_GD))
1196 tls_type = old_tls_type;
1197 else if ((old_tls_type & GOT_TLS_GD) && (tls_type & GOT_TLS_GD))
1198 tls_type |= old_tls_type;
1202 /* xgettext:c-format */
1203 (_("%pB: `%s' accessed both as normal and thread local symbol"),
1205 h ? h->root.root.string : "<local>");
1210 if (old_tls_type != tls_type)
1213 eh->tls_type = tls_type;
1215 elf_xtensa_local_got_tls_type (abfd) [r_symndx] = tls_type;
1224 elf_xtensa_make_sym_local (struct bfd_link_info *info,
1225 struct elf_link_hash_entry *h)
1227 if (bfd_link_pic (info))
1229 if (h->plt.refcount > 0)
1231 /* For shared objects, there's no need for PLT entries for local
1232 symbols (use RELATIVE relocs instead of JMP_SLOT relocs). */
1233 if (h->got.refcount < 0)
1234 h->got.refcount = 0;
1235 h->got.refcount += h->plt.refcount;
1236 h->plt.refcount = 0;
1241 /* Don't need any dynamic relocations at all. */
1242 h->plt.refcount = 0;
1243 h->got.refcount = 0;
1249 elf_xtensa_hide_symbol (struct bfd_link_info *info,
1250 struct elf_link_hash_entry *h,
1251 bfd_boolean force_local)
1253 /* For a shared link, move the plt refcount to the got refcount to leave
1254 space for RELATIVE relocs. */
1255 elf_xtensa_make_sym_local (info, h);
1257 _bfd_elf_link_hash_hide_symbol (info, h, force_local);
1261 /* Return the section that should be marked against GC for a given
1265 elf_xtensa_gc_mark_hook (asection *sec,
1266 struct bfd_link_info *info,
1267 Elf_Internal_Rela *rel,
1268 struct elf_link_hash_entry *h,
1269 Elf_Internal_Sym *sym)
1271 /* Property sections are marked "KEEP" in the linker scripts, but they
1272 should not cause other sections to be marked. (This approach relies
1273 on elf_xtensa_discard_info to remove property table entries that
1274 describe discarded sections. Alternatively, it might be more
1275 efficient to avoid using "KEEP" in the linker scripts and instead use
1276 the gc_mark_extra_sections hook to mark only the property sections
1277 that describe marked sections. That alternative does not work well
1278 with the current property table sections, which do not correspond
1279 one-to-one with the sections they describe, but that should be fixed
1281 if (xtensa_is_property_section (sec))
1285 switch (ELF32_R_TYPE (rel->r_info))
1287 case R_XTENSA_GNU_VTINHERIT:
1288 case R_XTENSA_GNU_VTENTRY:
1292 return _bfd_elf_gc_mark_hook (sec, info, rel, h, sym);
1296 /* Create all the dynamic sections. */
1299 elf_xtensa_create_dynamic_sections (bfd *dynobj, struct bfd_link_info *info)
1301 struct elf_xtensa_link_hash_table *htab;
1302 flagword flags, noalloc_flags;
1304 htab = elf_xtensa_hash_table (info);
1308 /* First do all the standard stuff. */
1309 if (! _bfd_elf_create_dynamic_sections (dynobj, info))
1312 /* Create any extra PLT sections in case check_relocs has already
1313 been called on all the non-dynamic input files. */
1314 if (! add_extra_plt_sections (info, htab->plt_reloc_count))
1317 noalloc_flags = (SEC_HAS_CONTENTS | SEC_IN_MEMORY
1318 | SEC_LINKER_CREATED | SEC_READONLY);
1319 flags = noalloc_flags | SEC_ALLOC | SEC_LOAD;
1321 /* Mark the ".got.plt" section READONLY. */
1322 if (htab->elf.sgotplt == NULL
1323 || ! bfd_set_section_flags (dynobj, htab->elf.sgotplt, flags))
1326 /* Create ".got.loc" (literal tables for use by dynamic linker). */
1327 htab->sgotloc = bfd_make_section_anyway_with_flags (dynobj, ".got.loc",
1329 if (htab->sgotloc == NULL
1330 || ! bfd_set_section_alignment (dynobj, htab->sgotloc, 2))
1333 /* Create ".xt.lit.plt" (literal table for ".got.plt*"). */
1334 htab->spltlittbl = bfd_make_section_anyway_with_flags (dynobj, ".xt.lit.plt",
1336 if (htab->spltlittbl == NULL
1337 || ! bfd_set_section_alignment (dynobj, htab->spltlittbl, 2))
1345 add_extra_plt_sections (struct bfd_link_info *info, int count)
1347 bfd *dynobj = elf_hash_table (info)->dynobj;
1350 /* Iterate over all chunks except 0 which uses the standard ".plt" and
1351 ".got.plt" sections. */
1352 for (chunk = count / PLT_ENTRIES_PER_CHUNK; chunk > 0; chunk--)
1358 /* Stop when we find a section has already been created. */
1359 if (elf_xtensa_get_plt_section (info, chunk))
1362 flags = (SEC_ALLOC | SEC_LOAD | SEC_HAS_CONTENTS | SEC_IN_MEMORY
1363 | SEC_LINKER_CREATED | SEC_READONLY);
1365 sname = (char *) bfd_malloc (10);
1366 sprintf (sname, ".plt.%u", chunk);
1367 s = bfd_make_section_anyway_with_flags (dynobj, sname, flags | SEC_CODE);
1369 || ! bfd_set_section_alignment (dynobj, s, 2))
1372 sname = (char *) bfd_malloc (14);
1373 sprintf (sname, ".got.plt.%u", chunk);
1374 s = bfd_make_section_anyway_with_flags (dynobj, sname, flags);
1376 || ! bfd_set_section_alignment (dynobj, s, 2))
1384 /* Adjust a symbol defined by a dynamic object and referenced by a
1385 regular object. The current definition is in some section of the
1386 dynamic object, but we're not including those sections. We have to
1387 change the definition to something the rest of the link can
1391 elf_xtensa_adjust_dynamic_symbol (struct bfd_link_info *info ATTRIBUTE_UNUSED,
1392 struct elf_link_hash_entry *h)
1394 /* If this is a weak symbol, and there is a real definition, the
1395 processor independent code will have arranged for us to see the
1396 real definition first, and we can just use the same value. */
1397 if (h->is_weakalias)
1399 struct elf_link_hash_entry *def = weakdef (h);
1400 BFD_ASSERT (def->root.type == bfd_link_hash_defined);
1401 h->root.u.def.section = def->root.u.def.section;
1402 h->root.u.def.value = def->root.u.def.value;
1406 /* This is a reference to a symbol defined by a dynamic object. The
1407 reference must go through the GOT, so there's no need for COPY relocs,
1415 elf_xtensa_allocate_dynrelocs (struct elf_link_hash_entry *h, void *arg)
1417 struct bfd_link_info *info;
1418 struct elf_xtensa_link_hash_table *htab;
1419 struct elf_xtensa_link_hash_entry *eh = elf_xtensa_hash_entry (h);
1421 if (h->root.type == bfd_link_hash_indirect)
1424 info = (struct bfd_link_info *) arg;
1425 htab = elf_xtensa_hash_table (info);
1429 /* If we saw any use of an IE model for this symbol, we can then optimize
1430 away GOT entries for any TLSDESC_FN relocs. */
1431 if ((eh->tls_type & GOT_TLS_IE) != 0)
1433 BFD_ASSERT (h->got.refcount >= eh->tlsfunc_refcount);
1434 h->got.refcount -= eh->tlsfunc_refcount;
1437 if (! elf_xtensa_dynamic_symbol_p (h, info))
1438 elf_xtensa_make_sym_local (info, h);
1440 if (! elf_xtensa_dynamic_symbol_p (h, info)
1441 && h->root.type == bfd_link_hash_undefweak)
1444 if (h->plt.refcount > 0)
1445 htab->elf.srelplt->size += (h->plt.refcount * sizeof (Elf32_External_Rela));
1447 if (h->got.refcount > 0)
1448 htab->elf.srelgot->size += (h->got.refcount * sizeof (Elf32_External_Rela));
1455 elf_xtensa_allocate_local_got_size (struct bfd_link_info *info)
1457 struct elf_xtensa_link_hash_table *htab;
1460 htab = elf_xtensa_hash_table (info);
1464 for (i = info->input_bfds; i; i = i->link.next)
1466 bfd_signed_vma *local_got_refcounts;
1467 bfd_size_type j, cnt;
1468 Elf_Internal_Shdr *symtab_hdr;
1470 local_got_refcounts = elf_local_got_refcounts (i);
1471 if (!local_got_refcounts)
1474 symtab_hdr = &elf_tdata (i)->symtab_hdr;
1475 cnt = symtab_hdr->sh_info;
1477 for (j = 0; j < cnt; ++j)
1479 /* If we saw any use of an IE model for this symbol, we can
1480 then optimize away GOT entries for any TLSDESC_FN relocs. */
1481 if ((elf_xtensa_local_got_tls_type (i) [j] & GOT_TLS_IE) != 0)
1483 bfd_signed_vma *tlsfunc_refcount
1484 = &elf_xtensa_local_tlsfunc_refcounts (i) [j];
1485 BFD_ASSERT (local_got_refcounts[j] >= *tlsfunc_refcount);
1486 local_got_refcounts[j] -= *tlsfunc_refcount;
1489 if (local_got_refcounts[j] > 0)
1490 htab->elf.srelgot->size += (local_got_refcounts[j]
1491 * sizeof (Elf32_External_Rela));
1497 /* Set the sizes of the dynamic sections. */
1500 elf_xtensa_size_dynamic_sections (bfd *output_bfd ATTRIBUTE_UNUSED,
1501 struct bfd_link_info *info)
1503 struct elf_xtensa_link_hash_table *htab;
1505 asection *s, *srelplt, *splt, *sgotplt, *srelgot, *spltlittbl, *sgotloc;
1506 bfd_boolean relplt, relgot;
1507 int plt_entries, plt_chunks, chunk;
1512 htab = elf_xtensa_hash_table (info);
1516 dynobj = elf_hash_table (info)->dynobj;
1519 srelgot = htab->elf.srelgot;
1520 srelplt = htab->elf.srelplt;
1522 if (elf_hash_table (info)->dynamic_sections_created)
1524 BFD_ASSERT (htab->elf.srelgot != NULL
1525 && htab->elf.srelplt != NULL
1526 && htab->elf.sgot != NULL
1527 && htab->spltlittbl != NULL
1528 && htab->sgotloc != NULL);
1530 /* Set the contents of the .interp section to the interpreter. */
1531 if (bfd_link_executable (info) && !info->nointerp)
1533 s = bfd_get_linker_section (dynobj, ".interp");
1536 s->size = sizeof ELF_DYNAMIC_INTERPRETER;
1537 s->contents = (unsigned char *) ELF_DYNAMIC_INTERPRETER;
1540 /* Allocate room for one word in ".got". */
1541 htab->elf.sgot->size = 4;
1543 /* Allocate space in ".rela.got" for literals that reference global
1544 symbols and space in ".rela.plt" for literals that have PLT
1546 elf_link_hash_traverse (elf_hash_table (info),
1547 elf_xtensa_allocate_dynrelocs,
1550 /* If we are generating a shared object, we also need space in
1551 ".rela.got" for R_XTENSA_RELATIVE relocs for literals that
1552 reference local symbols. */
1553 if (bfd_link_pic (info))
1554 elf_xtensa_allocate_local_got_size (info);
1556 /* Allocate space in ".plt" to match the size of ".rela.plt". For
1557 each PLT entry, we need the PLT code plus a 4-byte literal.
1558 For each chunk of ".plt", we also need two more 4-byte
1559 literals, two corresponding entries in ".rela.got", and an
1560 8-byte entry in ".xt.lit.plt". */
1561 spltlittbl = htab->spltlittbl;
1562 plt_entries = srelplt->size / sizeof (Elf32_External_Rela);
1564 (plt_entries + PLT_ENTRIES_PER_CHUNK - 1) / PLT_ENTRIES_PER_CHUNK;
1566 /* Iterate over all the PLT chunks, including any extra sections
1567 created earlier because the initial count of PLT relocations
1568 was an overestimate. */
1570 (splt = elf_xtensa_get_plt_section (info, chunk)) != NULL;
1575 sgotplt = elf_xtensa_get_gotplt_section (info, chunk);
1576 BFD_ASSERT (sgotplt != NULL);
1578 if (chunk < plt_chunks - 1)
1579 chunk_entries = PLT_ENTRIES_PER_CHUNK;
1580 else if (chunk == plt_chunks - 1)
1581 chunk_entries = plt_entries - (chunk * PLT_ENTRIES_PER_CHUNK);
1585 if (chunk_entries != 0)
1587 sgotplt->size = 4 * (chunk_entries + 2);
1588 splt->size = PLT_ENTRY_SIZE * chunk_entries;
1589 srelgot->size += 2 * sizeof (Elf32_External_Rela);
1590 spltlittbl->size += 8;
1599 /* Allocate space in ".got.loc" to match the total size of all the
1601 sgotloc = htab->sgotloc;
1602 sgotloc->size = spltlittbl->size;
1603 for (abfd = info->input_bfds; abfd != NULL; abfd = abfd->link.next)
1605 if (abfd->flags & DYNAMIC)
1607 for (s = abfd->sections; s != NULL; s = s->next)
1609 if (! discarded_section (s)
1610 && xtensa_is_littable_section (s)
1612 sgotloc->size += s->size;
1617 /* Allocate memory for dynamic sections. */
1620 for (s = dynobj->sections; s != NULL; s = s->next)
1624 if ((s->flags & SEC_LINKER_CREATED) == 0)
1627 /* It's OK to base decisions on the section name, because none
1628 of the dynobj section names depend upon the input files. */
1629 name = bfd_get_section_name (dynobj, s);
1631 if (CONST_STRNEQ (name, ".rela"))
1635 if (strcmp (name, ".rela.plt") == 0)
1637 else if (strcmp (name, ".rela.got") == 0)
1640 /* We use the reloc_count field as a counter if we need
1641 to copy relocs into the output file. */
1645 else if (! CONST_STRNEQ (name, ".plt.")
1646 && ! CONST_STRNEQ (name, ".got.plt.")
1647 && strcmp (name, ".got") != 0
1648 && strcmp (name, ".plt") != 0
1649 && strcmp (name, ".got.plt") != 0
1650 && strcmp (name, ".xt.lit.plt") != 0
1651 && strcmp (name, ".got.loc") != 0)
1653 /* It's not one of our sections, so don't allocate space. */
1659 /* If we don't need this section, strip it from the output
1660 file. We must create the ".plt*" and ".got.plt*"
1661 sections in create_dynamic_sections and/or check_relocs
1662 based on a conservative estimate of the PLT relocation
1663 count, because the sections must be created before the
1664 linker maps input sections to output sections. The
1665 linker does that before size_dynamic_sections, where we
1666 compute the exact size of the PLT, so there may be more
1667 of these sections than are actually needed. */
1668 s->flags |= SEC_EXCLUDE;
1670 else if ((s->flags & SEC_HAS_CONTENTS) != 0)
1672 /* Allocate memory for the section contents. */
1673 s->contents = (bfd_byte *) bfd_zalloc (dynobj, s->size);
1674 if (s->contents == NULL)
1679 if (elf_hash_table (info)->dynamic_sections_created)
1681 /* Add the special XTENSA_RTLD relocations now. The offsets won't be
1682 known until finish_dynamic_sections, but we need to get the relocs
1683 in place before they are sorted. */
1684 for (chunk = 0; chunk < plt_chunks; chunk++)
1686 Elf_Internal_Rela irela;
1690 irela.r_info = ELF32_R_INFO (0, R_XTENSA_RTLD);
1693 loc = (srelgot->contents
1694 + srelgot->reloc_count * sizeof (Elf32_External_Rela));
1695 bfd_elf32_swap_reloca_out (output_bfd, &irela, loc);
1696 bfd_elf32_swap_reloca_out (output_bfd, &irela,
1697 loc + sizeof (Elf32_External_Rela));
1698 srelgot->reloc_count += 2;
1701 /* Add some entries to the .dynamic section. We fill in the
1702 values later, in elf_xtensa_finish_dynamic_sections, but we
1703 must add the entries now so that we get the correct size for
1704 the .dynamic section. The DT_DEBUG entry is filled in by the
1705 dynamic linker and used by the debugger. */
1706 #define add_dynamic_entry(TAG, VAL) \
1707 _bfd_elf_add_dynamic_entry (info, TAG, VAL)
1709 if (bfd_link_executable (info))
1711 if (!add_dynamic_entry (DT_DEBUG, 0))
1717 if (!add_dynamic_entry (DT_PLTRELSZ, 0)
1718 || !add_dynamic_entry (DT_PLTREL, DT_RELA)
1719 || !add_dynamic_entry (DT_JMPREL, 0))
1725 if (!add_dynamic_entry (DT_RELA, 0)
1726 || !add_dynamic_entry (DT_RELASZ, 0)
1727 || !add_dynamic_entry (DT_RELAENT, sizeof (Elf32_External_Rela)))
1731 if (!add_dynamic_entry (DT_PLTGOT, 0)
1732 || !add_dynamic_entry (DT_XTENSA_GOT_LOC_OFF, 0)
1733 || !add_dynamic_entry (DT_XTENSA_GOT_LOC_SZ, 0))
1736 #undef add_dynamic_entry
1742 elf_xtensa_always_size_sections (bfd *output_bfd,
1743 struct bfd_link_info *info)
1745 struct elf_xtensa_link_hash_table *htab;
1748 htab = elf_xtensa_hash_table (info);
1752 tls_sec = htab->elf.tls_sec;
1754 if (tls_sec && (htab->tlsbase->tls_type & GOT_TLS_ANY) != 0)
1756 struct elf_link_hash_entry *tlsbase = &htab->tlsbase->elf;
1757 struct bfd_link_hash_entry *bh = &tlsbase->root;
1758 const struct elf_backend_data *bed = get_elf_backend_data (output_bfd);
1760 tlsbase->type = STT_TLS;
1761 if (!(_bfd_generic_link_add_one_symbol
1762 (info, output_bfd, "_TLS_MODULE_BASE_", BSF_LOCAL,
1763 tls_sec, 0, NULL, FALSE,
1764 bed->collect, &bh)))
1766 tlsbase->def_regular = 1;
1767 tlsbase->other = STV_HIDDEN;
1768 (*bed->elf_backend_hide_symbol) (info, tlsbase, TRUE);
1775 /* Return the base VMA address which should be subtracted from real addresses
1776 when resolving @dtpoff relocation.
1777 This is PT_TLS segment p_vaddr. */
1780 dtpoff_base (struct bfd_link_info *info)
1782 /* If tls_sec is NULL, we should have signalled an error already. */
1783 if (elf_hash_table (info)->tls_sec == NULL)
1785 return elf_hash_table (info)->tls_sec->vma;
1788 /* Return the relocation value for @tpoff relocation
1789 if STT_TLS virtual address is ADDRESS. */
1792 tpoff (struct bfd_link_info *info, bfd_vma address)
1794 struct elf_link_hash_table *htab = elf_hash_table (info);
1797 /* If tls_sec is NULL, we should have signalled an error already. */
1798 if (htab->tls_sec == NULL)
1800 base = align_power ((bfd_vma) TCB_SIZE, htab->tls_sec->alignment_power);
1801 return address - htab->tls_sec->vma + base;
1804 /* Perform the specified relocation. The instruction at (contents + address)
1805 is modified to set one operand to represent the value in "relocation". The
1806 operand position is determined by the relocation type recorded in the
1809 #define CALL_SEGMENT_BITS (30)
1810 #define CALL_SEGMENT_SIZE (1 << CALL_SEGMENT_BITS)
1812 static bfd_reloc_status_type
1813 elf_xtensa_do_reloc (reloc_howto_type *howto,
1815 asection *input_section,
1819 bfd_boolean is_weak_undef,
1820 char **error_message)
1823 xtensa_opcode opcode;
1824 xtensa_isa isa = xtensa_default_isa;
1825 static xtensa_insnbuf ibuff = NULL;
1826 static xtensa_insnbuf sbuff = NULL;
1827 bfd_vma self_address;
1828 bfd_size_type input_size;
1834 ibuff = xtensa_insnbuf_alloc (isa);
1835 sbuff = xtensa_insnbuf_alloc (isa);
1838 input_size = bfd_get_section_limit (abfd, input_section);
1840 /* Calculate the PC address for this instruction. */
1841 self_address = (input_section->output_section->vma
1842 + input_section->output_offset
1845 switch (howto->type)
1848 case R_XTENSA_DIFF8:
1849 case R_XTENSA_DIFF16:
1850 case R_XTENSA_DIFF32:
1851 case R_XTENSA_TLS_FUNC:
1852 case R_XTENSA_TLS_ARG:
1853 case R_XTENSA_TLS_CALL:
1854 return bfd_reloc_ok;
1856 case R_XTENSA_ASM_EXPAND:
1859 /* Check for windowed CALL across a 1GB boundary. */
1860 opcode = get_expanded_call_opcode (contents + address,
1861 input_size - address, 0);
1862 if (is_windowed_call_opcode (opcode))
1864 if ((self_address >> CALL_SEGMENT_BITS)
1865 != (relocation >> CALL_SEGMENT_BITS))
1867 *error_message = "windowed longcall crosses 1GB boundary; "
1869 return bfd_reloc_dangerous;
1873 return bfd_reloc_ok;
1875 case R_XTENSA_ASM_SIMPLIFY:
1877 /* Convert the L32R/CALLX to CALL. */
1878 bfd_reloc_status_type retval =
1879 elf_xtensa_do_asm_simplify (contents, address, input_size,
1881 if (retval != bfd_reloc_ok)
1882 return bfd_reloc_dangerous;
1884 /* The CALL needs to be relocated. Continue below for that part. */
1887 howto = &elf_howto_table[(unsigned) R_XTENSA_SLOT0_OP ];
1894 x = bfd_get_32 (abfd, contents + address);
1896 bfd_put_32 (abfd, x, contents + address);
1898 return bfd_reloc_ok;
1900 case R_XTENSA_32_PCREL:
1901 bfd_put_32 (abfd, relocation - self_address, contents + address);
1902 return bfd_reloc_ok;
1905 case R_XTENSA_TLSDESC_FN:
1906 case R_XTENSA_TLSDESC_ARG:
1907 case R_XTENSA_TLS_DTPOFF:
1908 case R_XTENSA_TLS_TPOFF:
1909 bfd_put_32 (abfd, relocation, contents + address);
1910 return bfd_reloc_ok;
1913 /* Only instruction slot-specific relocations handled below.... */
1914 slot = get_relocation_slot (howto->type);
1915 if (slot == XTENSA_UNDEFINED)
1917 *error_message = "unexpected relocation";
1918 return bfd_reloc_dangerous;
1921 /* Read the instruction into a buffer and decode the opcode. */
1922 xtensa_insnbuf_from_chars (isa, ibuff, contents + address,
1923 input_size - address);
1924 fmt = xtensa_format_decode (isa, ibuff);
1925 if (fmt == XTENSA_UNDEFINED)
1927 *error_message = "cannot decode instruction format";
1928 return bfd_reloc_dangerous;
1931 xtensa_format_get_slot (isa, fmt, slot, ibuff, sbuff);
1933 opcode = xtensa_opcode_decode (isa, fmt, slot, sbuff);
1934 if (opcode == XTENSA_UNDEFINED)
1936 *error_message = "cannot decode instruction opcode";
1937 return bfd_reloc_dangerous;
1940 /* Check for opcode-specific "alternate" relocations. */
1941 if (is_alt_relocation (howto->type))
1943 if (opcode == get_l32r_opcode ())
1945 /* Handle the special-case of non-PC-relative L32R instructions. */
1946 bfd *output_bfd = input_section->output_section->owner;
1947 asection *lit4_sec = bfd_get_section_by_name (output_bfd, ".lit4");
1950 *error_message = "relocation references missing .lit4 section";
1951 return bfd_reloc_dangerous;
1953 self_address = ((lit4_sec->vma & ~0xfff)
1954 + 0x40000 - 3); /* -3 to compensate for do_reloc */
1955 newval = relocation;
1958 else if (opcode == get_const16_opcode ())
1960 /* ALT used for high 16 bits.
1961 Ignore 32-bit overflow. */
1962 newval = (relocation >> 16) & 0xffff;
1967 /* No other "alternate" relocations currently defined. */
1968 *error_message = "unexpected relocation";
1969 return bfd_reloc_dangerous;
1972 else /* Not an "alternate" relocation.... */
1974 if (opcode == get_const16_opcode ())
1976 newval = relocation & 0xffff;
1981 /* ...normal PC-relative relocation.... */
1983 /* Determine which operand is being relocated. */
1984 opnd = get_relocation_opnd (opcode, howto->type);
1985 if (opnd == XTENSA_UNDEFINED)
1987 *error_message = "unexpected relocation";
1988 return bfd_reloc_dangerous;
1991 if (!howto->pc_relative)
1993 *error_message = "expected PC-relative relocation";
1994 return bfd_reloc_dangerous;
1997 newval = relocation;
2001 /* Apply the relocation. */
2002 if (xtensa_operand_do_reloc (isa, opcode, opnd, &newval, self_address)
2003 || xtensa_operand_encode (isa, opcode, opnd, &newval)
2004 || xtensa_operand_set_field (isa, opcode, opnd, fmt, slot,
2007 const char *opname = xtensa_opcode_name (isa, opcode);
2010 msg = "cannot encode";
2011 if (is_direct_call_opcode (opcode))
2013 if ((relocation & 0x3) != 0)
2014 msg = "misaligned call target";
2016 msg = "call target out of range";
2018 else if (opcode == get_l32r_opcode ())
2020 if ((relocation & 0x3) != 0)
2021 msg = "misaligned literal target";
2022 else if (is_alt_relocation (howto->type))
2023 msg = "literal target out of range (too many literals)";
2024 else if (self_address > relocation)
2025 msg = "literal target out of range (try using text-section-literals)";
2027 msg = "literal placed after use";
2030 *error_message = vsprint_msg (opname, ": %s", strlen (msg) + 2, msg);
2031 return bfd_reloc_dangerous;
2034 /* Check for calls across 1GB boundaries. */
2035 if (is_direct_call_opcode (opcode)
2036 && is_windowed_call_opcode (opcode))
2038 if ((self_address >> CALL_SEGMENT_BITS)
2039 != (relocation >> CALL_SEGMENT_BITS))
2042 "windowed call crosses 1GB boundary; return may fail";
2043 return bfd_reloc_dangerous;
2047 /* Write the modified instruction back out of the buffer. */
2048 xtensa_format_set_slot (isa, fmt, slot, ibuff, sbuff);
2049 xtensa_insnbuf_to_chars (isa, ibuff, contents + address,
2050 input_size - address);
2051 return bfd_reloc_ok;
2056 vsprint_msg (const char *origmsg, const char *fmt, int arglen, ...)
2058 /* To reduce the size of the memory leak,
2059 we only use a single message buffer. */
2060 static bfd_size_type alloc_size = 0;
2061 static char *message = NULL;
2062 bfd_size_type orig_len, len = 0;
2063 bfd_boolean is_append;
2066 va_start (ap, arglen);
2068 is_append = (origmsg == message);
2070 orig_len = strlen (origmsg);
2071 len = orig_len + strlen (fmt) + arglen + 20;
2072 if (len > alloc_size)
2074 message = (char *) bfd_realloc_or_free (message, len);
2077 if (message != NULL)
2080 memcpy (message, origmsg, orig_len);
2081 vsprintf (message + orig_len, fmt, ap);
2088 /* This function is registered as the "special_function" in the
2089 Xtensa howto for handling simplify operations.
2090 bfd_perform_relocation / bfd_install_relocation use it to
2091 perform (install) the specified relocation. Since this replaces the code
2092 in bfd_perform_relocation, it is basically an Xtensa-specific,
2093 stripped-down version of bfd_perform_relocation. */
2095 static bfd_reloc_status_type
2096 bfd_elf_xtensa_reloc (bfd *abfd,
2097 arelent *reloc_entry,
2100 asection *input_section,
2102 char **error_message)
2105 bfd_reloc_status_type flag;
2106 bfd_size_type octets = reloc_entry->address * bfd_octets_per_byte (abfd);
2107 bfd_vma output_base = 0;
2108 reloc_howto_type *howto = reloc_entry->howto;
2109 asection *reloc_target_output_section;
2110 bfd_boolean is_weak_undef;
2112 if (!xtensa_default_isa)
2113 xtensa_default_isa = xtensa_isa_init (0, 0);
2115 /* ELF relocs are against symbols. If we are producing relocatable
2116 output, and the reloc is against an external symbol, the resulting
2117 reloc will also be against the same symbol. In such a case, we
2118 don't want to change anything about the way the reloc is handled,
2119 since it will all be done at final link time. This test is similar
2120 to what bfd_elf_generic_reloc does except that it lets relocs with
2121 howto->partial_inplace go through even if the addend is non-zero.
2122 (The real problem is that partial_inplace is set for XTENSA_32
2123 relocs to begin with, but that's a long story and there's little we
2124 can do about it now....) */
2126 if (output_bfd && (symbol->flags & BSF_SECTION_SYM) == 0)
2128 reloc_entry->address += input_section->output_offset;
2129 return bfd_reloc_ok;
2132 /* Is the address of the relocation really within the section? */
2133 if (reloc_entry->address > bfd_get_section_limit (abfd, input_section))
2134 return bfd_reloc_outofrange;
2136 /* Work out which section the relocation is targeted at and the
2137 initial relocation command value. */
2139 /* Get symbol value. (Common symbols are special.) */
2140 if (bfd_is_com_section (symbol->section))
2143 relocation = symbol->value;
2145 reloc_target_output_section = symbol->section->output_section;
2147 /* Convert input-section-relative symbol value to absolute. */
2148 if ((output_bfd && !howto->partial_inplace)
2149 || reloc_target_output_section == NULL)
2152 output_base = reloc_target_output_section->vma;
2154 relocation += output_base + symbol->section->output_offset;
2156 /* Add in supplied addend. */
2157 relocation += reloc_entry->addend;
2159 /* Here the variable relocation holds the final address of the
2160 symbol we are relocating against, plus any addend. */
2163 if (!howto->partial_inplace)
2165 /* This is a partial relocation, and we want to apply the relocation
2166 to the reloc entry rather than the raw data. Everything except
2167 relocations against section symbols has already been handled
2170 BFD_ASSERT (symbol->flags & BSF_SECTION_SYM);
2171 reloc_entry->addend = relocation;
2172 reloc_entry->address += input_section->output_offset;
2173 return bfd_reloc_ok;
2177 reloc_entry->address += input_section->output_offset;
2178 reloc_entry->addend = 0;
2182 is_weak_undef = (bfd_is_und_section (symbol->section)
2183 && (symbol->flags & BSF_WEAK) != 0);
2184 flag = elf_xtensa_do_reloc (howto, abfd, input_section, relocation,
2185 (bfd_byte *) data, (bfd_vma) octets,
2186 is_weak_undef, error_message);
2188 if (flag == bfd_reloc_dangerous)
2190 /* Add the symbol name to the error message. */
2191 if (! *error_message)
2192 *error_message = "";
2193 *error_message = vsprint_msg (*error_message, ": (%s + 0x%lx)",
2194 strlen (symbol->name) + 17,
2196 (unsigned long) reloc_entry->addend);
2203 /* Set up an entry in the procedure linkage table. */
2206 elf_xtensa_create_plt_entry (struct bfd_link_info *info,
2208 unsigned reloc_index)
2210 asection *splt, *sgotplt;
2211 bfd_vma plt_base, got_base;
2212 bfd_vma code_offset, lit_offset, abi_offset;
2215 chunk = reloc_index / PLT_ENTRIES_PER_CHUNK;
2216 splt = elf_xtensa_get_plt_section (info, chunk);
2217 sgotplt = elf_xtensa_get_gotplt_section (info, chunk);
2218 BFD_ASSERT (splt != NULL && sgotplt != NULL);
2220 plt_base = splt->output_section->vma + splt->output_offset;
2221 got_base = sgotplt->output_section->vma + sgotplt->output_offset;
2223 lit_offset = 8 + (reloc_index % PLT_ENTRIES_PER_CHUNK) * 4;
2224 code_offset = (reloc_index % PLT_ENTRIES_PER_CHUNK) * PLT_ENTRY_SIZE;
2226 /* Fill in the literal entry. This is the offset of the dynamic
2227 relocation entry. */
2228 bfd_put_32 (output_bfd, reloc_index * sizeof (Elf32_External_Rela),
2229 sgotplt->contents + lit_offset);
2231 /* Fill in the entry in the procedure linkage table. */
2232 memcpy (splt->contents + code_offset,
2233 (bfd_big_endian (output_bfd)
2234 ? elf_xtensa_be_plt_entry[XSHAL_ABI != XTHAL_ABI_WINDOWED]
2235 : elf_xtensa_le_plt_entry[XSHAL_ABI != XTHAL_ABI_WINDOWED]),
2237 abi_offset = XSHAL_ABI == XTHAL_ABI_WINDOWED ? 3 : 0;
2238 bfd_put_16 (output_bfd, l32r_offset (got_base + 0,
2239 plt_base + code_offset + abi_offset),
2240 splt->contents + code_offset + abi_offset + 1);
2241 bfd_put_16 (output_bfd, l32r_offset (got_base + 4,
2242 plt_base + code_offset + abi_offset + 3),
2243 splt->contents + code_offset + abi_offset + 4);
2244 bfd_put_16 (output_bfd, l32r_offset (got_base + lit_offset,
2245 plt_base + code_offset + abi_offset + 6),
2246 splt->contents + code_offset + abi_offset + 7);
2248 return plt_base + code_offset;
2252 static bfd_boolean get_indirect_call_dest_reg (xtensa_opcode, unsigned *);
2255 replace_tls_insn (Elf_Internal_Rela *rel,
2257 asection *input_section,
2259 bfd_boolean is_ld_model,
2260 char **error_message)
2262 static xtensa_insnbuf ibuff = NULL;
2263 static xtensa_insnbuf sbuff = NULL;
2264 xtensa_isa isa = xtensa_default_isa;
2266 xtensa_opcode old_op, new_op;
2267 bfd_size_type input_size;
2269 unsigned dest_reg, src_reg;
2273 ibuff = xtensa_insnbuf_alloc (isa);
2274 sbuff = xtensa_insnbuf_alloc (isa);
2277 input_size = bfd_get_section_limit (abfd, input_section);
2279 /* Read the instruction into a buffer and decode the opcode. */
2280 xtensa_insnbuf_from_chars (isa, ibuff, contents + rel->r_offset,
2281 input_size - rel->r_offset);
2282 fmt = xtensa_format_decode (isa, ibuff);
2283 if (fmt == XTENSA_UNDEFINED)
2285 *error_message = "cannot decode instruction format";
2289 BFD_ASSERT (xtensa_format_num_slots (isa, fmt) == 1);
2290 xtensa_format_get_slot (isa, fmt, 0, ibuff, sbuff);
2292 old_op = xtensa_opcode_decode (isa, fmt, 0, sbuff);
2293 if (old_op == XTENSA_UNDEFINED)
2295 *error_message = "cannot decode instruction opcode";
2299 r_type = ELF32_R_TYPE (rel->r_info);
2302 case R_XTENSA_TLS_FUNC:
2303 case R_XTENSA_TLS_ARG:
2304 if (old_op != get_l32r_opcode ()
2305 || xtensa_operand_get_field (isa, old_op, 0, fmt, 0,
2306 sbuff, &dest_reg) != 0)
2308 *error_message = "cannot extract L32R destination for TLS access";
2313 case R_XTENSA_TLS_CALL:
2314 if (! get_indirect_call_dest_reg (old_op, &dest_reg)
2315 || xtensa_operand_get_field (isa, old_op, 0, fmt, 0,
2316 sbuff, &src_reg) != 0)
2318 *error_message = "cannot extract CALLXn operands for TLS access";
2331 case R_XTENSA_TLS_FUNC:
2332 case R_XTENSA_TLS_ARG:
2333 /* Change the instruction to a NOP (or "OR a1, a1, a1" for older
2334 versions of Xtensa). */
2335 new_op = xtensa_opcode_lookup (isa, "nop");
2336 if (new_op == XTENSA_UNDEFINED)
2338 new_op = xtensa_opcode_lookup (isa, "or");
2339 if (new_op == XTENSA_UNDEFINED
2340 || xtensa_opcode_encode (isa, fmt, 0, sbuff, new_op) != 0
2341 || xtensa_operand_set_field (isa, new_op, 0, fmt, 0,
2343 || xtensa_operand_set_field (isa, new_op, 1, fmt, 0,
2345 || xtensa_operand_set_field (isa, new_op, 2, fmt, 0,
2348 *error_message = "cannot encode OR for TLS access";
2354 if (xtensa_opcode_encode (isa, fmt, 0, sbuff, new_op) != 0)
2356 *error_message = "cannot encode NOP for TLS access";
2362 case R_XTENSA_TLS_CALL:
2363 /* Read THREADPTR into the CALLX's return value register. */
2364 new_op = xtensa_opcode_lookup (isa, "rur.threadptr");
2365 if (new_op == XTENSA_UNDEFINED
2366 || xtensa_opcode_encode (isa, fmt, 0, sbuff, new_op) != 0
2367 || xtensa_operand_set_field (isa, new_op, 0, fmt, 0,
2368 sbuff, dest_reg + 2) != 0)
2370 *error_message = "cannot encode RUR.THREADPTR for TLS access";
2380 case R_XTENSA_TLS_FUNC:
2381 new_op = xtensa_opcode_lookup (isa, "rur.threadptr");
2382 if (new_op == XTENSA_UNDEFINED
2383 || xtensa_opcode_encode (isa, fmt, 0, sbuff, new_op) != 0
2384 || xtensa_operand_set_field (isa, new_op, 0, fmt, 0,
2385 sbuff, dest_reg) != 0)
2387 *error_message = "cannot encode RUR.THREADPTR for TLS access";
2392 case R_XTENSA_TLS_ARG:
2393 /* Nothing to do. Keep the original L32R instruction. */
2396 case R_XTENSA_TLS_CALL:
2397 /* Add the CALLX's src register (holding the THREADPTR value)
2398 to the first argument register (holding the offset) and put
2399 the result in the CALLX's return value register. */
2400 new_op = xtensa_opcode_lookup (isa, "add");
2401 if (new_op == XTENSA_UNDEFINED
2402 || xtensa_opcode_encode (isa, fmt, 0, sbuff, new_op) != 0
2403 || xtensa_operand_set_field (isa, new_op, 0, fmt, 0,
2404 sbuff, dest_reg + 2) != 0
2405 || xtensa_operand_set_field (isa, new_op, 1, fmt, 0,
2406 sbuff, dest_reg + 2) != 0
2407 || xtensa_operand_set_field (isa, new_op, 2, fmt, 0,
2408 sbuff, src_reg) != 0)
2410 *error_message = "cannot encode ADD for TLS access";
2417 xtensa_format_set_slot (isa, fmt, 0, ibuff, sbuff);
2418 xtensa_insnbuf_to_chars (isa, ibuff, contents + rel->r_offset,
2419 input_size - rel->r_offset);
2425 #define IS_XTENSA_TLS_RELOC(R_TYPE) \
2426 ((R_TYPE) == R_XTENSA_TLSDESC_FN \
2427 || (R_TYPE) == R_XTENSA_TLSDESC_ARG \
2428 || (R_TYPE) == R_XTENSA_TLS_DTPOFF \
2429 || (R_TYPE) == R_XTENSA_TLS_TPOFF \
2430 || (R_TYPE) == R_XTENSA_TLS_FUNC \
2431 || (R_TYPE) == R_XTENSA_TLS_ARG \
2432 || (R_TYPE) == R_XTENSA_TLS_CALL)
2434 /* Relocate an Xtensa ELF section. This is invoked by the linker for
2435 both relocatable and final links. */
2438 elf_xtensa_relocate_section (bfd *output_bfd,
2439 struct bfd_link_info *info,
2441 asection *input_section,
2443 Elf_Internal_Rela *relocs,
2444 Elf_Internal_Sym *local_syms,
2445 asection **local_sections)
2447 struct elf_xtensa_link_hash_table *htab;
2448 Elf_Internal_Shdr *symtab_hdr;
2449 Elf_Internal_Rela *rel;
2450 Elf_Internal_Rela *relend;
2451 struct elf_link_hash_entry **sym_hashes;
2452 property_table_entry *lit_table = 0;
2454 char *local_got_tls_types;
2455 char *error_message = NULL;
2456 bfd_size_type input_size;
2459 if (!xtensa_default_isa)
2460 xtensa_default_isa = xtensa_isa_init (0, 0);
2462 BFD_ASSERT (is_xtensa_elf (input_bfd));
2464 htab = elf_xtensa_hash_table (info);
2468 symtab_hdr = &elf_tdata (input_bfd)->symtab_hdr;
2469 sym_hashes = elf_sym_hashes (input_bfd);
2470 local_got_tls_types = elf_xtensa_local_got_tls_type (input_bfd);
2472 if (elf_hash_table (info)->dynamic_sections_created)
2474 ltblsize = xtensa_read_table_entries (input_bfd, input_section,
2475 &lit_table, XTENSA_LIT_SEC_NAME,
2481 input_size = bfd_get_section_limit (input_bfd, input_section);
2484 relend = relocs + input_section->reloc_count;
2485 for (; rel < relend; rel++)
2488 reloc_howto_type *howto;
2489 unsigned long r_symndx;
2490 struct elf_link_hash_entry *h;
2491 Elf_Internal_Sym *sym;
2496 bfd_reloc_status_type r;
2497 bfd_boolean is_weak_undef;
2498 bfd_boolean unresolved_reloc;
2500 bfd_boolean dynamic_symbol;
2502 r_type = ELF32_R_TYPE (rel->r_info);
2503 if (r_type == (int) R_XTENSA_GNU_VTINHERIT
2504 || r_type == (int) R_XTENSA_GNU_VTENTRY)
2507 if (r_type < 0 || r_type >= (int) R_XTENSA_max)
2509 bfd_set_error (bfd_error_bad_value);
2512 howto = &elf_howto_table[r_type];
2514 r_symndx = ELF32_R_SYM (rel->r_info);
2519 is_weak_undef = FALSE;
2520 unresolved_reloc = FALSE;
2523 if (howto->partial_inplace && !bfd_link_relocatable (info))
2525 /* Because R_XTENSA_32 was made partial_inplace to fix some
2526 problems with DWARF info in partial links, there may be
2527 an addend stored in the contents. Take it out of there
2528 and move it back into the addend field of the reloc. */
2529 rel->r_addend += bfd_get_32 (input_bfd, contents + rel->r_offset);
2530 bfd_put_32 (input_bfd, 0, contents + rel->r_offset);
2533 if (r_symndx < symtab_hdr->sh_info)
2535 sym = local_syms + r_symndx;
2536 sym_type = ELF32_ST_TYPE (sym->st_info);
2537 sec = local_sections[r_symndx];
2538 relocation = _bfd_elf_rela_local_sym (output_bfd, sym, &sec, rel);
2542 bfd_boolean ignored;
2544 RELOC_FOR_GLOBAL_SYMBOL (info, input_bfd, input_section, rel,
2545 r_symndx, symtab_hdr, sym_hashes,
2547 unresolved_reloc, warned, ignored);
2550 && !unresolved_reloc
2551 && h->root.type == bfd_link_hash_undefweak)
2552 is_weak_undef = TRUE;
2557 if (sec != NULL && discarded_section (sec))
2558 RELOC_AGAINST_DISCARDED_SECTION (info, input_bfd, input_section,
2559 rel, 1, relend, howto, 0, contents);
2561 if (bfd_link_relocatable (info))
2564 asection * sym_sec = get_elf_r_symndx_section (input_bfd, r_symndx);
2566 /* This is a relocatable link.
2567 1) If the reloc is against a section symbol, adjust
2568 according to the output section.
2569 2) If there is a new target for this relocation,
2570 the new target will be in the same output section.
2571 We adjust the relocation by the output section
2574 if (relaxing_section)
2576 /* Check if this references a section in another input file. */
2577 if (!do_fix_for_relocatable_link (rel, input_bfd, input_section,
2582 dest_addr = sym_sec->output_section->vma + sym_sec->output_offset
2583 + get_elf_r_symndx_offset (input_bfd, r_symndx) + rel->r_addend;
2585 if (r_type == R_XTENSA_ASM_SIMPLIFY)
2587 error_message = NULL;
2588 /* Convert ASM_SIMPLIFY into the simpler relocation
2589 so that they never escape a relaxing link. */
2590 r = contract_asm_expansion (contents, input_size, rel,
2592 if (r != bfd_reloc_ok)
2593 (*info->callbacks->reloc_dangerous)
2594 (info, error_message,
2595 input_bfd, input_section, rel->r_offset);
2597 r_type = ELF32_R_TYPE (rel->r_info);
2600 /* This is a relocatable link, so we don't have to change
2601 anything unless the reloc is against a section symbol,
2602 in which case we have to adjust according to where the
2603 section symbol winds up in the output section. */
2604 if (r_symndx < symtab_hdr->sh_info)
2606 sym = local_syms + r_symndx;
2607 if (ELF_ST_TYPE (sym->st_info) == STT_SECTION)
2609 sec = local_sections[r_symndx];
2610 rel->r_addend += sec->output_offset + sym->st_value;
2614 /* If there is an addend with a partial_inplace howto,
2615 then move the addend to the contents. This is a hack
2616 to work around problems with DWARF in relocatable links
2617 with some previous version of BFD. Now we can't easily get
2618 rid of the hack without breaking backward compatibility.... */
2620 howto = &elf_howto_table[r_type];
2621 if (howto->partial_inplace && rel->r_addend)
2623 r = elf_xtensa_do_reloc (howto, input_bfd, input_section,
2624 rel->r_addend, contents,
2625 rel->r_offset, FALSE,
2631 /* Put the correct bits in the target instruction, even
2632 though the relocation will still be present in the output
2633 file. This makes disassembly clearer, as well as
2634 allowing loadable kernel modules to work without needing
2635 relocations on anything other than calls and l32r's. */
2637 /* If it is not in the same section, there is nothing we can do. */
2638 if (r_type >= R_XTENSA_SLOT0_OP && r_type <= R_XTENSA_SLOT14_OP &&
2639 sym_sec->output_section == input_section->output_section)
2641 r = elf_xtensa_do_reloc (howto, input_bfd, input_section,
2642 dest_addr, contents,
2643 rel->r_offset, FALSE,
2647 if (r != bfd_reloc_ok)
2648 (*info->callbacks->reloc_dangerous)
2649 (info, error_message,
2650 input_bfd, input_section, rel->r_offset);
2652 /* Done with work for relocatable link; continue with next reloc. */
2656 /* This is a final link. */
2658 if (relaxing_section)
2660 /* Check if this references a section in another input file. */
2661 do_fix_for_final_link (rel, input_bfd, input_section, contents,
2665 /* Sanity check the address. */
2666 if (rel->r_offset >= input_size
2667 && ELF32_R_TYPE (rel->r_info) != R_XTENSA_NONE)
2670 /* xgettext:c-format */
2671 (_("%pB(%pA+%#" PRIx64 "): "
2672 "relocation offset out of range (size=%#" PRIx64 ")"),
2673 input_bfd, input_section, (uint64_t) rel->r_offset,
2674 (uint64_t) input_size);
2675 bfd_set_error (bfd_error_bad_value);
2680 name = h->root.root.string;
2683 name = (bfd_elf_string_from_elf_section
2684 (input_bfd, symtab_hdr->sh_link, sym->st_name));
2685 if (name == NULL || *name == '\0')
2686 name = bfd_section_name (input_bfd, sec);
2689 if (r_symndx != STN_UNDEF
2690 && r_type != R_XTENSA_NONE
2692 || h->root.type == bfd_link_hash_defined
2693 || h->root.type == bfd_link_hash_defweak)
2694 && IS_XTENSA_TLS_RELOC (r_type) != (sym_type == STT_TLS))
2697 ((sym_type == STT_TLS
2698 /* xgettext:c-format */
2699 ? _("%pB(%pA+%#" PRIx64 "): %s used with TLS symbol %s")
2700 /* xgettext:c-format */
2701 : _("%pB(%pA+%#" PRIx64 "): %s used with non-TLS symbol %s")),
2704 (uint64_t) rel->r_offset,
2709 dynamic_symbol = elf_xtensa_dynamic_symbol_p (h, info);
2711 tls_type = GOT_UNKNOWN;
2713 tls_type = elf_xtensa_hash_entry (h)->tls_type;
2714 else if (local_got_tls_types)
2715 tls_type = local_got_tls_types [r_symndx];
2721 if (elf_hash_table (info)->dynamic_sections_created
2722 && (input_section->flags & SEC_ALLOC) != 0
2723 && (dynamic_symbol || bfd_link_pic (info)))
2725 Elf_Internal_Rela outrel;
2729 if (dynamic_symbol && r_type == R_XTENSA_PLT)
2730 srel = htab->elf.srelplt;
2732 srel = htab->elf.srelgot;
2734 BFD_ASSERT (srel != NULL);
2737 _bfd_elf_section_offset (output_bfd, info,
2738 input_section, rel->r_offset);
2740 if ((outrel.r_offset | 1) == (bfd_vma) -1)
2741 memset (&outrel, 0, sizeof outrel);
2744 outrel.r_offset += (input_section->output_section->vma
2745 + input_section->output_offset);
2747 /* Complain if the relocation is in a read-only section
2748 and not in a literal pool. */
2749 if ((input_section->flags & SEC_READONLY) != 0
2750 && !elf_xtensa_in_literal_pool (lit_table, ltblsize,
2754 _("dynamic relocation in read-only section");
2755 (*info->callbacks->reloc_dangerous)
2756 (info, error_message,
2757 input_bfd, input_section, rel->r_offset);
2762 outrel.r_addend = rel->r_addend;
2765 if (r_type == R_XTENSA_32)
2768 ELF32_R_INFO (h->dynindx, R_XTENSA_GLOB_DAT);
2771 else /* r_type == R_XTENSA_PLT */
2774 ELF32_R_INFO (h->dynindx, R_XTENSA_JMP_SLOT);
2776 /* Create the PLT entry and set the initial
2777 contents of the literal entry to the address of
2780 elf_xtensa_create_plt_entry (info, output_bfd,
2783 unresolved_reloc = FALSE;
2785 else if (!is_weak_undef)
2787 /* Generate a RELATIVE relocation. */
2788 outrel.r_info = ELF32_R_INFO (0, R_XTENSA_RELATIVE);
2789 outrel.r_addend = 0;
2797 loc = (srel->contents
2798 + srel->reloc_count++ * sizeof (Elf32_External_Rela));
2799 bfd_elf32_swap_reloca_out (output_bfd, &outrel, loc);
2800 BFD_ASSERT (sizeof (Elf32_External_Rela) * srel->reloc_count
2803 else if (r_type == R_XTENSA_ASM_EXPAND && dynamic_symbol)
2805 /* This should only happen for non-PIC code, which is not
2806 supposed to be used on systems with dynamic linking.
2807 Just ignore these relocations. */
2812 case R_XTENSA_TLS_TPOFF:
2813 /* Switch to LE model for local symbols in an executable. */
2814 if (! bfd_link_pic (info) && ! dynamic_symbol)
2816 relocation = tpoff (info, relocation);
2821 case R_XTENSA_TLSDESC_FN:
2822 case R_XTENSA_TLSDESC_ARG:
2824 if (r_type == R_XTENSA_TLSDESC_FN)
2826 if (! bfd_link_pic (info) || (tls_type & GOT_TLS_IE) != 0)
2827 r_type = R_XTENSA_NONE;
2829 else if (r_type == R_XTENSA_TLSDESC_ARG)
2831 if (bfd_link_pic (info))
2833 if ((tls_type & GOT_TLS_IE) != 0)
2834 r_type = R_XTENSA_TLS_TPOFF;
2838 r_type = R_XTENSA_TLS_TPOFF;
2839 if (! dynamic_symbol)
2841 relocation = tpoff (info, relocation);
2847 if (r_type == R_XTENSA_NONE)
2848 /* Nothing to do here; skip to the next reloc. */
2851 if (! elf_hash_table (info)->dynamic_sections_created)
2854 _("TLS relocation invalid without dynamic sections");
2855 (*info->callbacks->reloc_dangerous)
2856 (info, error_message,
2857 input_bfd, input_section, rel->r_offset);
2861 Elf_Internal_Rela outrel;
2863 asection *srel = htab->elf.srelgot;
2866 outrel.r_offset = (input_section->output_section->vma
2867 + input_section->output_offset
2870 /* Complain if the relocation is in a read-only section
2871 and not in a literal pool. */
2872 if ((input_section->flags & SEC_READONLY) != 0
2873 && ! elf_xtensa_in_literal_pool (lit_table, ltblsize,
2877 _("dynamic relocation in read-only section");
2878 (*info->callbacks->reloc_dangerous)
2879 (info, error_message,
2880 input_bfd, input_section, rel->r_offset);
2883 indx = h && h->dynindx != -1 ? h->dynindx : 0;
2885 outrel.r_addend = relocation - dtpoff_base (info);
2887 outrel.r_addend = 0;
2890 outrel.r_info = ELF32_R_INFO (indx, r_type);
2892 unresolved_reloc = FALSE;
2895 loc = (srel->contents
2896 + srel->reloc_count++ * sizeof (Elf32_External_Rela));
2897 bfd_elf32_swap_reloca_out (output_bfd, &outrel, loc);
2898 BFD_ASSERT (sizeof (Elf32_External_Rela) * srel->reloc_count
2904 case R_XTENSA_TLS_DTPOFF:
2905 if (! bfd_link_pic (info))
2906 /* Switch from LD model to LE model. */
2907 relocation = tpoff (info, relocation);
2909 relocation -= dtpoff_base (info);
2912 case R_XTENSA_TLS_FUNC:
2913 case R_XTENSA_TLS_ARG:
2914 case R_XTENSA_TLS_CALL:
2915 /* Check if optimizing to IE or LE model. */
2916 if ((tls_type & GOT_TLS_IE) != 0)
2918 bfd_boolean is_ld_model =
2919 (h && elf_xtensa_hash_entry (h) == htab->tlsbase);
2920 if (! replace_tls_insn (rel, input_bfd, input_section, contents,
2921 is_ld_model, &error_message))
2922 (*info->callbacks->reloc_dangerous)
2923 (info, error_message,
2924 input_bfd, input_section, rel->r_offset);
2926 if (r_type != R_XTENSA_TLS_ARG || is_ld_model)
2928 /* Skip subsequent relocations on the same instruction. */
2929 while (rel + 1 < relend && rel[1].r_offset == rel->r_offset)
2936 if (elf_hash_table (info)->dynamic_sections_created
2937 && dynamic_symbol && (is_operand_relocation (r_type)
2938 || r_type == R_XTENSA_32_PCREL))
2941 vsprint_msg ("invalid relocation for dynamic symbol", ": %s",
2942 strlen (name) + 2, name);
2943 (*info->callbacks->reloc_dangerous)
2944 (info, error_message, input_bfd, input_section, rel->r_offset);
2950 /* Dynamic relocs are not propagated for SEC_DEBUGGING sections
2951 because such sections are not SEC_ALLOC and thus ld.so will
2952 not process them. */
2953 if (unresolved_reloc
2954 && !((input_section->flags & SEC_DEBUGGING) != 0
2956 && _bfd_elf_section_offset (output_bfd, info, input_section,
2957 rel->r_offset) != (bfd_vma) -1)
2960 /* xgettext:c-format */
2961 (_("%pB(%pA+%#" PRIx64 "): "
2962 "unresolvable %s relocation against symbol `%s'"),
2965 (uint64_t) rel->r_offset,
2971 /* TLS optimizations may have changed r_type; update "howto". */
2972 howto = &elf_howto_table[r_type];
2974 /* There's no point in calling bfd_perform_relocation here.
2975 Just go directly to our "special function". */
2976 r = elf_xtensa_do_reloc (howto, input_bfd, input_section,
2977 relocation + rel->r_addend,
2978 contents, rel->r_offset, is_weak_undef,
2981 if (r != bfd_reloc_ok && !warned)
2983 BFD_ASSERT (r == bfd_reloc_dangerous || r == bfd_reloc_other);
2984 BFD_ASSERT (error_message != NULL);
2986 if (rel->r_addend == 0)
2987 error_message = vsprint_msg (error_message, ": %s",
2988 strlen (name) + 2, name);
2990 error_message = vsprint_msg (error_message, ": (%s+0x%x)",
2992 name, (int) rel->r_addend);
2994 (*info->callbacks->reloc_dangerous)
2995 (info, error_message, input_bfd, input_section, rel->r_offset);
3002 input_section->reloc_done = TRUE;
3008 /* Finish up dynamic symbol handling. There's not much to do here since
3009 the PLT and GOT entries are all set up by relocate_section. */
3012 elf_xtensa_finish_dynamic_symbol (bfd *output_bfd ATTRIBUTE_UNUSED,
3013 struct bfd_link_info *info ATTRIBUTE_UNUSED,
3014 struct elf_link_hash_entry *h,
3015 Elf_Internal_Sym *sym)
3017 if (h->needs_plt && !h->def_regular)
3019 /* Mark the symbol as undefined, rather than as defined in
3020 the .plt section. Leave the value alone. */
3021 sym->st_shndx = SHN_UNDEF;
3022 /* If the symbol is weak, we do need to clear the value.
3023 Otherwise, the PLT entry would provide a definition for
3024 the symbol even if the symbol wasn't defined anywhere,
3025 and so the symbol would never be NULL. */
3026 if (!h->ref_regular_nonweak)
3030 /* Mark _DYNAMIC and _GLOBAL_OFFSET_TABLE_ as absolute. */
3031 if (h == elf_hash_table (info)->hdynamic
3032 || h == elf_hash_table (info)->hgot)
3033 sym->st_shndx = SHN_ABS;
3039 /* Combine adjacent literal table entries in the output. Adjacent
3040 entries within each input section may have been removed during
3041 relaxation, but we repeat the process here, even though it's too late
3042 to shrink the output section, because it's important to minimize the
3043 number of literal table entries to reduce the start-up work for the
3044 runtime linker. Returns the number of remaining table entries or -1
3048 elf_xtensa_combine_prop_entries (bfd *output_bfd,
3053 property_table_entry *table;
3054 bfd_size_type section_size, sgotloc_size;
3058 section_size = sxtlit->size;
3059 BFD_ASSERT (section_size % 8 == 0);
3060 num = section_size / 8;
3062 sgotloc_size = sgotloc->size;
3063 if (sgotloc_size != section_size)
3066 (_("internal inconsistency in size of .got.loc section"));
3070 table = bfd_malloc (num * sizeof (property_table_entry));
3074 /* The ".xt.lit.plt" section has the SEC_IN_MEMORY flag set and this
3075 propagates to the output section, where it doesn't really apply and
3076 where it breaks the following call to bfd_malloc_and_get_section. */
3077 sxtlit->flags &= ~SEC_IN_MEMORY;
3079 if (!bfd_malloc_and_get_section (output_bfd, sxtlit, &contents))
3087 /* There should never be any relocations left at this point, so this
3088 is quite a bit easier than what is done during relaxation. */
3090 /* Copy the raw contents into a property table array and sort it. */
3092 for (n = 0; n < num; n++)
3094 table[n].address = bfd_get_32 (output_bfd, &contents[offset]);
3095 table[n].size = bfd_get_32 (output_bfd, &contents[offset + 4]);
3098 qsort (table, num, sizeof (property_table_entry), property_table_compare);
3100 for (n = 0; n < num; n++)
3102 bfd_boolean remove_entry = FALSE;
3104 if (table[n].size == 0)
3105 remove_entry = TRUE;
3107 && (table[n-1].address + table[n-1].size == table[n].address))
3109 table[n-1].size += table[n].size;
3110 remove_entry = TRUE;
3115 for (m = n; m < num - 1; m++)
3117 table[m].address = table[m+1].address;
3118 table[m].size = table[m+1].size;
3126 /* Copy the data back to the raw contents. */
3128 for (n = 0; n < num; n++)
3130 bfd_put_32 (output_bfd, table[n].address, &contents[offset]);
3131 bfd_put_32 (output_bfd, table[n].size, &contents[offset + 4]);
3135 /* Clear the removed bytes. */
3136 if ((bfd_size_type) (num * 8) < section_size)
3137 memset (&contents[num * 8], 0, section_size - num * 8);
3139 if (! bfd_set_section_contents (output_bfd, sxtlit, contents, 0,
3143 /* Copy the contents to ".got.loc". */
3144 memcpy (sgotloc->contents, contents, section_size);
3152 /* Finish up the dynamic sections. */
3155 elf_xtensa_finish_dynamic_sections (bfd *output_bfd,
3156 struct bfd_link_info *info)
3158 struct elf_xtensa_link_hash_table *htab;
3160 asection *sdyn, *srelplt, *srelgot, *sgot, *sxtlit, *sgotloc;
3161 Elf32_External_Dyn *dyncon, *dynconend;
3162 int num_xtlit_entries = 0;
3164 if (! elf_hash_table (info)->dynamic_sections_created)
3167 htab = elf_xtensa_hash_table (info);
3171 dynobj = elf_hash_table (info)->dynobj;
3172 sdyn = bfd_get_linker_section (dynobj, ".dynamic");
3173 BFD_ASSERT (sdyn != NULL);
3175 /* Set the first entry in the global offset table to the address of
3176 the dynamic section. */
3177 sgot = htab->elf.sgot;
3180 BFD_ASSERT (sgot->size == 4);
3182 bfd_put_32 (output_bfd, 0, sgot->contents);
3184 bfd_put_32 (output_bfd,
3185 sdyn->output_section->vma + sdyn->output_offset,
3189 srelplt = htab->elf.srelplt;
3190 srelgot = htab->elf.srelgot;
3191 if (srelplt && srelplt->size != 0)
3193 asection *sgotplt, *spltlittbl;
3194 int chunk, plt_chunks, plt_entries;
3195 Elf_Internal_Rela irela;
3197 unsigned rtld_reloc;
3199 spltlittbl = htab->spltlittbl;
3200 BFD_ASSERT (srelgot != NULL && spltlittbl != NULL);
3202 /* Find the first XTENSA_RTLD relocation. Presumably the rest
3203 of them follow immediately after.... */
3204 for (rtld_reloc = 0; rtld_reloc < srelgot->reloc_count; rtld_reloc++)
3206 loc = srelgot->contents + rtld_reloc * sizeof (Elf32_External_Rela);
3207 bfd_elf32_swap_reloca_in (output_bfd, loc, &irela);
3208 if (ELF32_R_TYPE (irela.r_info) == R_XTENSA_RTLD)
3211 BFD_ASSERT (rtld_reloc < srelgot->reloc_count);
3213 plt_entries = srelplt->size / sizeof (Elf32_External_Rela);
3215 (plt_entries + PLT_ENTRIES_PER_CHUNK - 1) / PLT_ENTRIES_PER_CHUNK;
3217 for (chunk = 0; chunk < plt_chunks; chunk++)
3219 int chunk_entries = 0;
3221 sgotplt = elf_xtensa_get_gotplt_section (info, chunk);
3222 BFD_ASSERT (sgotplt != NULL);
3224 /* Emit special RTLD relocations for the first two entries in
3225 each chunk of the .got.plt section. */
3227 loc = srelgot->contents + rtld_reloc * sizeof (Elf32_External_Rela);
3228 bfd_elf32_swap_reloca_in (output_bfd, loc, &irela);
3229 BFD_ASSERT (ELF32_R_TYPE (irela.r_info) == R_XTENSA_RTLD);
3230 irela.r_offset = (sgotplt->output_section->vma
3231 + sgotplt->output_offset);
3232 irela.r_addend = 1; /* tell rtld to set value to resolver function */
3233 bfd_elf32_swap_reloca_out (output_bfd, &irela, loc);
3235 BFD_ASSERT (rtld_reloc <= srelgot->reloc_count);
3237 /* Next literal immediately follows the first. */
3238 loc += sizeof (Elf32_External_Rela);
3239 bfd_elf32_swap_reloca_in (output_bfd, loc, &irela);
3240 BFD_ASSERT (ELF32_R_TYPE (irela.r_info) == R_XTENSA_RTLD);
3241 irela.r_offset = (sgotplt->output_section->vma
3242 + sgotplt->output_offset + 4);
3243 /* Tell rtld to set value to object's link map. */
3245 bfd_elf32_swap_reloca_out (output_bfd, &irela, loc);
3247 BFD_ASSERT (rtld_reloc <= srelgot->reloc_count);
3249 /* Fill in the literal table. */
3250 if (chunk < plt_chunks - 1)
3251 chunk_entries = PLT_ENTRIES_PER_CHUNK;
3253 chunk_entries = plt_entries - (chunk * PLT_ENTRIES_PER_CHUNK);
3255 BFD_ASSERT ((unsigned) (chunk + 1) * 8 <= spltlittbl->size);
3256 bfd_put_32 (output_bfd,
3257 sgotplt->output_section->vma + sgotplt->output_offset,
3258 spltlittbl->contents + (chunk * 8) + 0);
3259 bfd_put_32 (output_bfd,
3260 8 + (chunk_entries * 4),
3261 spltlittbl->contents + (chunk * 8) + 4);
3264 /* The .xt.lit.plt section has just been modified. This must
3265 happen before the code below which combines adjacent literal
3266 table entries, and the .xt.lit.plt contents have to be forced to
3268 if (! bfd_set_section_contents (output_bfd,
3269 spltlittbl->output_section,
3270 spltlittbl->contents,
3271 spltlittbl->output_offset,
3274 /* Clear SEC_HAS_CONTENTS so the contents won't be output again. */
3275 spltlittbl->flags &= ~SEC_HAS_CONTENTS;
3278 /* All the dynamic relocations have been emitted at this point.
3279 Make sure the relocation sections are the correct size. */
3280 if ((srelgot && srelgot->size != (sizeof (Elf32_External_Rela)
3281 * srelgot->reloc_count))
3282 || (srelplt && srelplt->size != (sizeof (Elf32_External_Rela)
3283 * srelplt->reloc_count)))
3286 /* Combine adjacent literal table entries. */
3287 BFD_ASSERT (! bfd_link_relocatable (info));
3288 sxtlit = bfd_get_section_by_name (output_bfd, ".xt.lit");
3289 sgotloc = htab->sgotloc;
3290 BFD_ASSERT (sgotloc);
3294 elf_xtensa_combine_prop_entries (output_bfd, sxtlit, sgotloc);
3295 if (num_xtlit_entries < 0)
3299 dyncon = (Elf32_External_Dyn *) sdyn->contents;
3300 dynconend = (Elf32_External_Dyn *) (sdyn->contents + sdyn->size);
3301 for (; dyncon < dynconend; dyncon++)
3303 Elf_Internal_Dyn dyn;
3305 bfd_elf32_swap_dyn_in (dynobj, dyncon, &dyn);
3312 case DT_XTENSA_GOT_LOC_SZ:
3313 dyn.d_un.d_val = num_xtlit_entries;
3316 case DT_XTENSA_GOT_LOC_OFF:
3317 dyn.d_un.d_ptr = (htab->sgotloc->output_section->vma
3318 + htab->sgotloc->output_offset);
3322 dyn.d_un.d_ptr = (htab->elf.sgot->output_section->vma
3323 + htab->elf.sgot->output_offset);
3327 dyn.d_un.d_ptr = (htab->elf.srelplt->output_section->vma
3328 + htab->elf.srelplt->output_offset);
3332 dyn.d_un.d_val = htab->elf.srelplt->size;
3336 bfd_elf32_swap_dyn_out (output_bfd, &dyn, dyncon);
3343 /* Functions for dealing with the e_flags field. */
3345 /* Merge backend specific data from an object file to the output
3346 object file when linking. */
3349 elf_xtensa_merge_private_bfd_data (bfd *ibfd, struct bfd_link_info *info)
3351 bfd *obfd = info->output_bfd;
3352 unsigned out_mach, in_mach;
3353 flagword out_flag, in_flag;
3355 /* Check if we have the same endianness. */
3356 if (!_bfd_generic_verify_endian_match (ibfd, info))
3359 /* Don't even pretend to support mixed-format linking. */
3360 if (bfd_get_flavour (ibfd) != bfd_target_elf_flavour
3361 || bfd_get_flavour (obfd) != bfd_target_elf_flavour)
3364 out_flag = elf_elfheader (obfd)->e_flags;
3365 in_flag = elf_elfheader (ibfd)->e_flags;
3367 out_mach = out_flag & EF_XTENSA_MACH;
3368 in_mach = in_flag & EF_XTENSA_MACH;
3369 if (out_mach != in_mach)
3372 /* xgettext:c-format */
3373 (_("%pB: incompatible machine type; output is 0x%x; input is 0x%x"),
3374 ibfd, out_mach, in_mach);
3375 bfd_set_error (bfd_error_wrong_format);
3379 if (! elf_flags_init (obfd))
3381 elf_flags_init (obfd) = TRUE;
3382 elf_elfheader (obfd)->e_flags = in_flag;
3384 if (bfd_get_arch (obfd) == bfd_get_arch (ibfd)
3385 && bfd_get_arch_info (obfd)->the_default)
3386 return bfd_set_arch_mach (obfd, bfd_get_arch (ibfd),
3387 bfd_get_mach (ibfd));
3392 if ((out_flag & EF_XTENSA_XT_INSN) != (in_flag & EF_XTENSA_XT_INSN))
3393 elf_elfheader (obfd)->e_flags &= (~ EF_XTENSA_XT_INSN);
3395 if ((out_flag & EF_XTENSA_XT_LIT) != (in_flag & EF_XTENSA_XT_LIT))
3396 elf_elfheader (obfd)->e_flags &= (~ EF_XTENSA_XT_LIT);
3403 elf_xtensa_set_private_flags (bfd *abfd, flagword flags)
3405 BFD_ASSERT (!elf_flags_init (abfd)
3406 || elf_elfheader (abfd)->e_flags == flags);
3408 elf_elfheader (abfd)->e_flags |= flags;
3409 elf_flags_init (abfd) = TRUE;
3416 elf_xtensa_print_private_bfd_data (bfd *abfd, void *farg)
3418 FILE *f = (FILE *) farg;
3419 flagword e_flags = elf_elfheader (abfd)->e_flags;
3421 fprintf (f, "\nXtensa header:\n");
3422 if ((e_flags & EF_XTENSA_MACH) == E_XTENSA_MACH)
3423 fprintf (f, "\nMachine = Base\n");
3425 fprintf (f, "\nMachine Id = 0x%x\n", e_flags & EF_XTENSA_MACH);
3427 fprintf (f, "Insn tables = %s\n",
3428 (e_flags & EF_XTENSA_XT_INSN) ? "true" : "false");
3430 fprintf (f, "Literal tables = %s\n",
3431 (e_flags & EF_XTENSA_XT_LIT) ? "true" : "false");
3433 return _bfd_elf_print_private_bfd_data (abfd, farg);
3437 /* Set the right machine number for an Xtensa ELF file. */
3440 elf_xtensa_object_p (bfd *abfd)
3443 unsigned long arch = elf_elfheader (abfd)->e_flags & EF_XTENSA_MACH;
3448 mach = bfd_mach_xtensa;
3454 (void) bfd_default_set_arch_mach (abfd, bfd_arch_xtensa, mach);
3459 /* The final processing done just before writing out an Xtensa ELF object
3460 file. This gets the Xtensa architecture right based on the machine
3464 elf_xtensa_final_write_processing (bfd *abfd,
3465 bfd_boolean linker ATTRIBUTE_UNUSED)
3470 switch (mach = bfd_get_mach (abfd))
3472 case bfd_mach_xtensa:
3473 val = E_XTENSA_MACH;
3479 elf_elfheader (abfd)->e_flags &= (~ EF_XTENSA_MACH);
3480 elf_elfheader (abfd)->e_flags |= val;
3484 static enum elf_reloc_type_class
3485 elf_xtensa_reloc_type_class (const struct bfd_link_info *info ATTRIBUTE_UNUSED,
3486 const asection *rel_sec ATTRIBUTE_UNUSED,
3487 const Elf_Internal_Rela *rela)
3489 switch ((int) ELF32_R_TYPE (rela->r_info))
3491 case R_XTENSA_RELATIVE:
3492 return reloc_class_relative;
3493 case R_XTENSA_JMP_SLOT:
3494 return reloc_class_plt;
3496 return reloc_class_normal;
3502 elf_xtensa_discard_info_for_section (bfd *abfd,
3503 struct elf_reloc_cookie *cookie,
3504 struct bfd_link_info *info,
3508 bfd_vma offset, actual_offset;
3509 bfd_size_type removed_bytes = 0;
3510 bfd_size_type entry_size;
3512 if (sec->output_section
3513 && bfd_is_abs_section (sec->output_section))
3516 if (xtensa_is_proptable_section (sec))
3521 if (sec->size == 0 || sec->size % entry_size != 0)
3524 contents = retrieve_contents (abfd, sec, info->keep_memory);
3528 cookie->rels = retrieve_internal_relocs (abfd, sec, info->keep_memory);
3531 release_contents (sec, contents);
3535 /* Sort the relocations. They should already be in order when
3536 relaxation is enabled, but it might not be. */
3537 qsort (cookie->rels, sec->reloc_count, sizeof (Elf_Internal_Rela),
3538 internal_reloc_compare);
3540 cookie->rel = cookie->rels;
3541 cookie->relend = cookie->rels + sec->reloc_count;
3543 for (offset = 0; offset < sec->size; offset += entry_size)
3545 actual_offset = offset - removed_bytes;
3547 /* The ...symbol_deleted_p function will skip over relocs but it
3548 won't adjust their offsets, so do that here. */
3549 while (cookie->rel < cookie->relend
3550 && cookie->rel->r_offset < offset)
3552 cookie->rel->r_offset -= removed_bytes;
3556 while (cookie->rel < cookie->relend
3557 && cookie->rel->r_offset == offset)
3559 if (bfd_elf_reloc_symbol_deleted_p (offset, cookie))
3561 /* Remove the table entry. (If the reloc type is NONE, then
3562 the entry has already been merged with another and deleted
3563 during relaxation.) */
3564 if (ELF32_R_TYPE (cookie->rel->r_info) != R_XTENSA_NONE)
3566 /* Shift the contents up. */
3567 if (offset + entry_size < sec->size)
3568 memmove (&contents[actual_offset],
3569 &contents[actual_offset + entry_size],
3570 sec->size - offset - entry_size);
3571 removed_bytes += entry_size;
3574 /* Remove this relocation. */
3575 cookie->rel->r_info = ELF32_R_INFO (0, R_XTENSA_NONE);
3578 /* Adjust the relocation offset for previous removals. This
3579 should not be done before calling ...symbol_deleted_p
3580 because it might mess up the offset comparisons there.
3581 Make sure the offset doesn't underflow in the case where
3582 the first entry is removed. */
3583 if (cookie->rel->r_offset >= removed_bytes)
3584 cookie->rel->r_offset -= removed_bytes;
3586 cookie->rel->r_offset = 0;
3592 if (removed_bytes != 0)
3594 /* Adjust any remaining relocs (shouldn't be any). */
3595 for (; cookie->rel < cookie->relend; cookie->rel++)
3597 if (cookie->rel->r_offset >= removed_bytes)
3598 cookie->rel->r_offset -= removed_bytes;
3600 cookie->rel->r_offset = 0;
3603 /* Clear the removed bytes. */
3604 memset (&contents[sec->size - removed_bytes], 0, removed_bytes);
3606 pin_contents (sec, contents);
3607 pin_internal_relocs (sec, cookie->rels);
3610 if (sec->rawsize == 0)
3611 sec->rawsize = sec->size;
3612 sec->size -= removed_bytes;
3614 if (xtensa_is_littable_section (sec))
3616 asection *sgotloc = elf_xtensa_hash_table (info)->sgotloc;
3618 sgotloc->size -= removed_bytes;
3623 release_contents (sec, contents);
3624 release_internal_relocs (sec, cookie->rels);
3627 return (removed_bytes != 0);
3632 elf_xtensa_discard_info (bfd *abfd,
3633 struct elf_reloc_cookie *cookie,
3634 struct bfd_link_info *info)
3637 bfd_boolean changed = FALSE;
3639 for (sec = abfd->sections; sec != NULL; sec = sec->next)
3641 if (xtensa_is_property_section (sec))
3643 if (elf_xtensa_discard_info_for_section (abfd, cookie, info, sec))
3653 elf_xtensa_ignore_discarded_relocs (asection *sec)
3655 return xtensa_is_property_section (sec);
3660 elf_xtensa_action_discarded (asection *sec)
3662 if (strcmp (".xt_except_table", sec->name) == 0)
3665 if (strcmp (".xt_except_desc", sec->name) == 0)
3668 return _bfd_elf_default_action_discarded (sec);
3672 /* Support for core dump NOTE sections. */
3675 elf_xtensa_grok_prstatus (bfd *abfd, Elf_Internal_Note *note)
3680 /* The size for Xtensa is variable, so don't try to recognize the format
3681 based on the size. Just assume this is GNU/Linux. */
3684 elf_tdata (abfd)->core->signal = bfd_get_16 (abfd, note->descdata + 12);
3687 elf_tdata (abfd)->core->lwpid = bfd_get_32 (abfd, note->descdata + 24);
3691 size = note->descsz - offset - 4;
3693 /* Make a ".reg/999" section. */
3694 return _bfd_elfcore_make_pseudosection (abfd, ".reg",
3695 size, note->descpos + offset);
3700 elf_xtensa_grok_psinfo (bfd *abfd, Elf_Internal_Note *note)
3702 switch (note->descsz)
3707 case 128: /* GNU/Linux elf_prpsinfo */
3708 elf_tdata (abfd)->core->program
3709 = _bfd_elfcore_strndup (abfd, note->descdata + 32, 16);
3710 elf_tdata (abfd)->core->command
3711 = _bfd_elfcore_strndup (abfd, note->descdata + 48, 80);
3714 /* Note that for some reason, a spurious space is tacked
3715 onto the end of the args in some (at least one anyway)
3716 implementations, so strip it off if it exists. */
3719 char *command = elf_tdata (abfd)->core->command;
3720 int n = strlen (command);
3722 if (0 < n && command[n - 1] == ' ')
3723 command[n - 1] = '\0';
3730 /* Generic Xtensa configurability stuff. */
3732 static xtensa_opcode callx0_op = XTENSA_UNDEFINED;
3733 static xtensa_opcode callx4_op = XTENSA_UNDEFINED;
3734 static xtensa_opcode callx8_op = XTENSA_UNDEFINED;
3735 static xtensa_opcode callx12_op = XTENSA_UNDEFINED;
3736 static xtensa_opcode call0_op = XTENSA_UNDEFINED;
3737 static xtensa_opcode call4_op = XTENSA_UNDEFINED;
3738 static xtensa_opcode call8_op = XTENSA_UNDEFINED;
3739 static xtensa_opcode call12_op = XTENSA_UNDEFINED;
3742 init_call_opcodes (void)
3744 if (callx0_op == XTENSA_UNDEFINED)
3746 callx0_op = xtensa_opcode_lookup (xtensa_default_isa, "callx0");
3747 callx4_op = xtensa_opcode_lookup (xtensa_default_isa, "callx4");
3748 callx8_op = xtensa_opcode_lookup (xtensa_default_isa, "callx8");
3749 callx12_op = xtensa_opcode_lookup (xtensa_default_isa, "callx12");
3750 call0_op = xtensa_opcode_lookup (xtensa_default_isa, "call0");
3751 call4_op = xtensa_opcode_lookup (xtensa_default_isa, "call4");
3752 call8_op = xtensa_opcode_lookup (xtensa_default_isa, "call8");
3753 call12_op = xtensa_opcode_lookup (xtensa_default_isa, "call12");
3759 is_indirect_call_opcode (xtensa_opcode opcode)
3761 init_call_opcodes ();
3762 return (opcode == callx0_op
3763 || opcode == callx4_op
3764 || opcode == callx8_op
3765 || opcode == callx12_op);
3770 is_direct_call_opcode (xtensa_opcode opcode)
3772 init_call_opcodes ();
3773 return (opcode == call0_op
3774 || opcode == call4_op
3775 || opcode == call8_op
3776 || opcode == call12_op);
3781 is_windowed_call_opcode (xtensa_opcode opcode)
3783 init_call_opcodes ();
3784 return (opcode == call4_op
3785 || opcode == call8_op
3786 || opcode == call12_op
3787 || opcode == callx4_op
3788 || opcode == callx8_op
3789 || opcode == callx12_op);
3794 get_indirect_call_dest_reg (xtensa_opcode opcode, unsigned *pdst)
3796 unsigned dst = (unsigned) -1;
3798 init_call_opcodes ();
3799 if (opcode == callx0_op)
3801 else if (opcode == callx4_op)
3803 else if (opcode == callx8_op)
3805 else if (opcode == callx12_op)
3808 if (dst == (unsigned) -1)
3816 static xtensa_opcode
3817 get_const16_opcode (void)
3819 static bfd_boolean done_lookup = FALSE;
3820 static xtensa_opcode const16_opcode = XTENSA_UNDEFINED;
3823 const16_opcode = xtensa_opcode_lookup (xtensa_default_isa, "const16");
3826 return const16_opcode;
3830 static xtensa_opcode
3831 get_l32r_opcode (void)
3833 static xtensa_opcode l32r_opcode = XTENSA_UNDEFINED;
3834 static bfd_boolean done_lookup = FALSE;
3838 l32r_opcode = xtensa_opcode_lookup (xtensa_default_isa, "l32r");
3846 l32r_offset (bfd_vma addr, bfd_vma pc)
3850 offset = addr - ((pc+3) & -4);
3851 BFD_ASSERT ((offset & ((1 << 2) - 1)) == 0);
3852 offset = (signed int) offset >> 2;
3853 BFD_ASSERT ((signed int) offset >> 16 == -1);
3859 get_relocation_opnd (xtensa_opcode opcode, int r_type)
3861 xtensa_isa isa = xtensa_default_isa;
3862 int last_immed, last_opnd, opi;
3864 if (opcode == XTENSA_UNDEFINED)
3865 return XTENSA_UNDEFINED;
3867 /* Find the last visible PC-relative immediate operand for the opcode.
3868 If there are no PC-relative immediates, then choose the last visible
3869 immediate; otherwise, fail and return XTENSA_UNDEFINED. */
3870 last_immed = XTENSA_UNDEFINED;
3871 last_opnd = xtensa_opcode_num_operands (isa, opcode);
3872 for (opi = last_opnd - 1; opi >= 0; opi--)
3874 if (xtensa_operand_is_visible (isa, opcode, opi) == 0)
3876 if (xtensa_operand_is_PCrelative (isa, opcode, opi) == 1)
3881 if (last_immed == XTENSA_UNDEFINED
3882 && xtensa_operand_is_register (isa, opcode, opi) == 0)
3886 return XTENSA_UNDEFINED;
3888 /* If the operand number was specified in an old-style relocation,
3889 check for consistency with the operand computed above. */
3890 if (r_type >= R_XTENSA_OP0 && r_type <= R_XTENSA_OP2)
3892 int reloc_opnd = r_type - R_XTENSA_OP0;
3893 if (reloc_opnd != last_immed)
3894 return XTENSA_UNDEFINED;
3902 get_relocation_slot (int r_type)
3912 if (r_type >= R_XTENSA_SLOT0_OP && r_type <= R_XTENSA_SLOT14_OP)
3913 return r_type - R_XTENSA_SLOT0_OP;
3914 if (r_type >= R_XTENSA_SLOT0_ALT && r_type <= R_XTENSA_SLOT14_ALT)
3915 return r_type - R_XTENSA_SLOT0_ALT;
3919 return XTENSA_UNDEFINED;
3923 /* Get the opcode for a relocation. */
3925 static xtensa_opcode
3926 get_relocation_opcode (bfd *abfd,
3929 Elf_Internal_Rela *irel)
3931 static xtensa_insnbuf ibuff = NULL;
3932 static xtensa_insnbuf sbuff = NULL;
3933 xtensa_isa isa = xtensa_default_isa;
3937 if (contents == NULL)
3938 return XTENSA_UNDEFINED;
3940 if (bfd_get_section_limit (abfd, sec) <= irel->r_offset)
3941 return XTENSA_UNDEFINED;
3945 ibuff = xtensa_insnbuf_alloc (isa);
3946 sbuff = xtensa_insnbuf_alloc (isa);
3949 /* Decode the instruction. */
3950 xtensa_insnbuf_from_chars (isa, ibuff, &contents[irel->r_offset],
3951 sec->size - irel->r_offset);
3952 fmt = xtensa_format_decode (isa, ibuff);
3953 slot = get_relocation_slot (ELF32_R_TYPE (irel->r_info));
3954 if (slot == XTENSA_UNDEFINED)
3955 return XTENSA_UNDEFINED;
3956 xtensa_format_get_slot (isa, fmt, slot, ibuff, sbuff);
3957 return xtensa_opcode_decode (isa, fmt, slot, sbuff);
3962 is_l32r_relocation (bfd *abfd,
3965 Elf_Internal_Rela *irel)
3967 xtensa_opcode opcode;
3968 if (!is_operand_relocation (ELF32_R_TYPE (irel->r_info)))
3970 opcode = get_relocation_opcode (abfd, sec, contents, irel);
3971 return (opcode == get_l32r_opcode ());
3975 static bfd_size_type
3976 get_asm_simplify_size (bfd_byte *contents,
3977 bfd_size_type content_len,
3978 bfd_size_type offset)
3980 bfd_size_type insnlen, size = 0;
3982 /* Decode the size of the next two instructions. */
3983 insnlen = insn_decode_len (contents, content_len, offset);
3989 insnlen = insn_decode_len (contents, content_len, offset + size);
3999 is_alt_relocation (int r_type)
4001 return (r_type >= R_XTENSA_SLOT0_ALT
4002 && r_type <= R_XTENSA_SLOT14_ALT);
4007 is_operand_relocation (int r_type)
4017 if (r_type >= R_XTENSA_SLOT0_OP && r_type <= R_XTENSA_SLOT14_OP)
4019 if (r_type >= R_XTENSA_SLOT0_ALT && r_type <= R_XTENSA_SLOT14_ALT)
4028 #define MIN_INSN_LENGTH 2
4030 /* Return 0 if it fails to decode. */
4033 insn_decode_len (bfd_byte *contents,
4034 bfd_size_type content_len,
4035 bfd_size_type offset)
4038 xtensa_isa isa = xtensa_default_isa;
4040 static xtensa_insnbuf ibuff = NULL;
4042 if (offset + MIN_INSN_LENGTH > content_len)
4046 ibuff = xtensa_insnbuf_alloc (isa);
4047 xtensa_insnbuf_from_chars (isa, ibuff, &contents[offset],
4048 content_len - offset);
4049 fmt = xtensa_format_decode (isa, ibuff);
4050 if (fmt == XTENSA_UNDEFINED)
4052 insn_len = xtensa_format_length (isa, fmt);
4053 if (insn_len == XTENSA_UNDEFINED)
4059 /* Decode the opcode for a single slot instruction.
4060 Return 0 if it fails to decode or the instruction is multi-slot. */
4063 insn_decode_opcode (bfd_byte *contents,
4064 bfd_size_type content_len,
4065 bfd_size_type offset,
4068 xtensa_isa isa = xtensa_default_isa;
4070 static xtensa_insnbuf insnbuf = NULL;
4071 static xtensa_insnbuf slotbuf = NULL;
4073 if (offset + MIN_INSN_LENGTH > content_len)
4074 return XTENSA_UNDEFINED;
4076 if (insnbuf == NULL)
4078 insnbuf = xtensa_insnbuf_alloc (isa);
4079 slotbuf = xtensa_insnbuf_alloc (isa);
4082 xtensa_insnbuf_from_chars (isa, insnbuf, &contents[offset],
4083 content_len - offset);
4084 fmt = xtensa_format_decode (isa, insnbuf);
4085 if (fmt == XTENSA_UNDEFINED)
4086 return XTENSA_UNDEFINED;
4088 if (slot >= xtensa_format_num_slots (isa, fmt))
4089 return XTENSA_UNDEFINED;
4091 xtensa_format_get_slot (isa, fmt, slot, insnbuf, slotbuf);
4092 return xtensa_opcode_decode (isa, fmt, slot, slotbuf);
4096 /* The offset is the offset in the contents.
4097 The address is the address of that offset. */
4100 check_branch_target_aligned (bfd_byte *contents,
4101 bfd_size_type content_length,
4105 bfd_size_type insn_len = insn_decode_len (contents, content_length, offset);
4108 return check_branch_target_aligned_address (address, insn_len);
4113 check_loop_aligned (bfd_byte *contents,
4114 bfd_size_type content_length,
4118 bfd_size_type loop_len, insn_len;
4119 xtensa_opcode opcode;
4121 opcode = insn_decode_opcode (contents, content_length, offset, 0);
4122 if (opcode == XTENSA_UNDEFINED
4123 || xtensa_opcode_is_loop (xtensa_default_isa, opcode) != 1)
4129 loop_len = insn_decode_len (contents, content_length, offset);
4130 insn_len = insn_decode_len (contents, content_length, offset + loop_len);
4131 if (loop_len == 0 || insn_len == 0)
4137 return check_branch_target_aligned_address (address + loop_len, insn_len);
4142 check_branch_target_aligned_address (bfd_vma addr, int len)
4145 return (addr % 8 == 0);
4146 return ((addr >> 2) == ((addr + len - 1) >> 2));
4150 /* Instruction widening and narrowing. */
4152 /* When FLIX is available we need to access certain instructions only
4153 when they are 16-bit or 24-bit instructions. This table caches
4154 information about such instructions by walking through all the
4155 opcodes and finding the smallest single-slot format into which each
4158 static xtensa_format *op_single_fmt_table = NULL;
4162 init_op_single_format_table (void)
4164 xtensa_isa isa = xtensa_default_isa;
4165 xtensa_insnbuf ibuf;
4166 xtensa_opcode opcode;
4170 if (op_single_fmt_table)
4173 ibuf = xtensa_insnbuf_alloc (isa);
4174 num_opcodes = xtensa_isa_num_opcodes (isa);
4176 op_single_fmt_table = (xtensa_format *)
4177 bfd_malloc (sizeof (xtensa_format) * num_opcodes);
4178 for (opcode = 0; opcode < num_opcodes; opcode++)
4180 op_single_fmt_table[opcode] = XTENSA_UNDEFINED;
4181 for (fmt = 0; fmt < xtensa_isa_num_formats (isa); fmt++)
4183 if (xtensa_format_num_slots (isa, fmt) == 1
4184 && xtensa_opcode_encode (isa, fmt, 0, ibuf, opcode) == 0)
4186 xtensa_opcode old_fmt = op_single_fmt_table[opcode];
4187 int fmt_length = xtensa_format_length (isa, fmt);
4188 if (old_fmt == XTENSA_UNDEFINED
4189 || fmt_length < xtensa_format_length (isa, old_fmt))
4190 op_single_fmt_table[opcode] = fmt;
4194 xtensa_insnbuf_free (isa, ibuf);
4198 static xtensa_format
4199 get_single_format (xtensa_opcode opcode)
4201 init_op_single_format_table ();
4202 return op_single_fmt_table[opcode];
4206 /* For the set of narrowable instructions we do NOT include the
4207 narrowings beqz -> beqz.n or bnez -> bnez.n because of complexities
4208 involved during linker relaxation that may require these to
4209 re-expand in some conditions. Also, the narrowing "or" -> mov.n
4210 requires special case code to ensure it only works when op1 == op2. */
4218 struct string_pair narrowable[] =
4221 { "addi", "addi.n" },
4222 { "addmi", "addi.n" },
4223 { "l32i", "l32i.n" },
4224 { "movi", "movi.n" },
4226 { "retw", "retw.n" },
4227 { "s32i", "s32i.n" },
4228 { "or", "mov.n" } /* special case only when op1 == op2 */
4231 struct string_pair widenable[] =
4234 { "addi", "addi.n" },
4235 { "addmi", "addi.n" },
4236 { "beqz", "beqz.n" },
4237 { "bnez", "bnez.n" },
4238 { "l32i", "l32i.n" },
4239 { "movi", "movi.n" },
4241 { "retw", "retw.n" },
4242 { "s32i", "s32i.n" },
4243 { "or", "mov.n" } /* special case only when op1 == op2 */
4247 /* Check if an instruction can be "narrowed", i.e., changed from a standard
4248 3-byte instruction to a 2-byte "density" instruction. If it is valid,
4249 return the instruction buffer holding the narrow instruction. Otherwise,
4250 return 0. The set of valid narrowing are specified by a string table
4251 but require some special case operand checks in some cases. */
4253 static xtensa_insnbuf
4254 can_narrow_instruction (xtensa_insnbuf slotbuf,
4256 xtensa_opcode opcode)
4258 xtensa_isa isa = xtensa_default_isa;
4259 xtensa_format o_fmt;
4262 static xtensa_insnbuf o_insnbuf = NULL;
4263 static xtensa_insnbuf o_slotbuf = NULL;
4265 if (o_insnbuf == NULL)
4267 o_insnbuf = xtensa_insnbuf_alloc (isa);
4268 o_slotbuf = xtensa_insnbuf_alloc (isa);
4271 for (opi = 0; opi < (sizeof (narrowable)/sizeof (struct string_pair)); opi++)
4273 bfd_boolean is_or = (strcmp ("or", narrowable[opi].wide) == 0);
4275 if (opcode == xtensa_opcode_lookup (isa, narrowable[opi].wide))
4277 uint32 value, newval;
4278 int i, operand_count, o_operand_count;
4279 xtensa_opcode o_opcode;
4281 /* Address does not matter in this case. We might need to
4282 fix it to handle branches/jumps. */
4283 bfd_vma self_address = 0;
4285 o_opcode = xtensa_opcode_lookup (isa, narrowable[opi].narrow);
4286 if (o_opcode == XTENSA_UNDEFINED)
4288 o_fmt = get_single_format (o_opcode);
4289 if (o_fmt == XTENSA_UNDEFINED)
4292 if (xtensa_format_length (isa, fmt) != 3
4293 || xtensa_format_length (isa, o_fmt) != 2)
4296 xtensa_format_encode (isa, o_fmt, o_insnbuf);
4297 operand_count = xtensa_opcode_num_operands (isa, opcode);
4298 o_operand_count = xtensa_opcode_num_operands (isa, o_opcode);
4300 if (xtensa_opcode_encode (isa, o_fmt, 0, o_slotbuf, o_opcode) != 0)
4305 if (xtensa_opcode_num_operands (isa, o_opcode) != operand_count)
4310 uint32 rawval0, rawval1, rawval2;
4312 if (o_operand_count + 1 != operand_count
4313 || xtensa_operand_get_field (isa, opcode, 0,
4314 fmt, 0, slotbuf, &rawval0) != 0
4315 || xtensa_operand_get_field (isa, opcode, 1,
4316 fmt, 0, slotbuf, &rawval1) != 0
4317 || xtensa_operand_get_field (isa, opcode, 2,
4318 fmt, 0, slotbuf, &rawval2) != 0
4319 || rawval1 != rawval2
4320 || rawval0 == rawval1 /* it is a nop */)
4324 for (i = 0; i < o_operand_count; ++i)
4326 if (xtensa_operand_get_field (isa, opcode, i, fmt, 0,
4328 || xtensa_operand_decode (isa, opcode, i, &value))
4331 /* PC-relative branches need adjustment, but
4332 the PC-rel operand will always have a relocation. */
4334 if (xtensa_operand_do_reloc (isa, o_opcode, i, &newval,
4336 || xtensa_operand_encode (isa, o_opcode, i, &newval)
4337 || xtensa_operand_set_field (isa, o_opcode, i, o_fmt, 0,
4342 if (xtensa_format_set_slot (isa, o_fmt, 0, o_insnbuf, o_slotbuf))
4352 /* Attempt to narrow an instruction. If the narrowing is valid, perform
4353 the action in-place directly into the contents and return TRUE. Otherwise,
4354 the return value is FALSE and the contents are not modified. */
4357 narrow_instruction (bfd_byte *contents,
4358 bfd_size_type content_length,
4359 bfd_size_type offset)
4361 xtensa_opcode opcode;
4362 bfd_size_type insn_len;
4363 xtensa_isa isa = xtensa_default_isa;
4365 xtensa_insnbuf o_insnbuf;
4367 static xtensa_insnbuf insnbuf = NULL;
4368 static xtensa_insnbuf slotbuf = NULL;
4370 if (insnbuf == NULL)
4372 insnbuf = xtensa_insnbuf_alloc (isa);
4373 slotbuf = xtensa_insnbuf_alloc (isa);
4376 BFD_ASSERT (offset < content_length);
4378 if (content_length < 2)
4381 /* We will hand-code a few of these for a little while.
4382 These have all been specified in the assembler aleady. */
4383 xtensa_insnbuf_from_chars (isa, insnbuf, &contents[offset],
4384 content_length - offset);
4385 fmt = xtensa_format_decode (isa, insnbuf);
4386 if (xtensa_format_num_slots (isa, fmt) != 1)
4389 if (xtensa_format_get_slot (isa, fmt, 0, insnbuf, slotbuf) != 0)
4392 opcode = xtensa_opcode_decode (isa, fmt, 0, slotbuf);
4393 if (opcode == XTENSA_UNDEFINED)
4395 insn_len = xtensa_format_length (isa, fmt);
4396 if (insn_len > content_length)
4399 o_insnbuf = can_narrow_instruction (slotbuf, fmt, opcode);
4402 xtensa_insnbuf_to_chars (isa, o_insnbuf, contents + offset,
4403 content_length - offset);
4411 /* Check if an instruction can be "widened", i.e., changed from a 2-byte
4412 "density" instruction to a standard 3-byte instruction. If it is valid,
4413 return the instruction buffer holding the wide instruction. Otherwise,
4414 return 0. The set of valid widenings are specified by a string table
4415 but require some special case operand checks in some cases. */
4417 static xtensa_insnbuf
4418 can_widen_instruction (xtensa_insnbuf slotbuf,
4420 xtensa_opcode opcode)
4422 xtensa_isa isa = xtensa_default_isa;
4423 xtensa_format o_fmt;
4426 static xtensa_insnbuf o_insnbuf = NULL;
4427 static xtensa_insnbuf o_slotbuf = NULL;
4429 if (o_insnbuf == NULL)
4431 o_insnbuf = xtensa_insnbuf_alloc (isa);
4432 o_slotbuf = xtensa_insnbuf_alloc (isa);
4435 for (opi = 0; opi < (sizeof (widenable)/sizeof (struct string_pair)); opi++)
4437 bfd_boolean is_or = (strcmp ("or", widenable[opi].wide) == 0);
4438 bfd_boolean is_branch = (strcmp ("beqz", widenable[opi].wide) == 0
4439 || strcmp ("bnez", widenable[opi].wide) == 0);
4441 if (opcode == xtensa_opcode_lookup (isa, widenable[opi].narrow))
4443 uint32 value, newval;
4444 int i, operand_count, o_operand_count, check_operand_count;
4445 xtensa_opcode o_opcode;
4447 /* Address does not matter in this case. We might need to fix it
4448 to handle branches/jumps. */
4449 bfd_vma self_address = 0;
4451 o_opcode = xtensa_opcode_lookup (isa, widenable[opi].wide);
4452 if (o_opcode == XTENSA_UNDEFINED)
4454 o_fmt = get_single_format (o_opcode);
4455 if (o_fmt == XTENSA_UNDEFINED)
4458 if (xtensa_format_length (isa, fmt) != 2
4459 || xtensa_format_length (isa, o_fmt) != 3)
4462 xtensa_format_encode (isa, o_fmt, o_insnbuf);
4463 operand_count = xtensa_opcode_num_operands (isa, opcode);
4464 o_operand_count = xtensa_opcode_num_operands (isa, o_opcode);
4465 check_operand_count = o_operand_count;
4467 if (xtensa_opcode_encode (isa, o_fmt, 0, o_slotbuf, o_opcode) != 0)
4472 if (xtensa_opcode_num_operands (isa, o_opcode) != operand_count)
4477 uint32 rawval0, rawval1;
4479 if (o_operand_count != operand_count + 1
4480 || xtensa_operand_get_field (isa, opcode, 0,
4481 fmt, 0, slotbuf, &rawval0) != 0
4482 || xtensa_operand_get_field (isa, opcode, 1,
4483 fmt, 0, slotbuf, &rawval1) != 0
4484 || rawval0 == rawval1 /* it is a nop */)
4488 check_operand_count--;
4490 for (i = 0; i < check_operand_count; i++)
4493 if (is_or && i == o_operand_count - 1)
4495 if (xtensa_operand_get_field (isa, opcode, new_i, fmt, 0,
4497 || xtensa_operand_decode (isa, opcode, new_i, &value))
4500 /* PC-relative branches need adjustment, but
4501 the PC-rel operand will always have a relocation. */
4503 if (xtensa_operand_do_reloc (isa, o_opcode, i, &newval,
4505 || xtensa_operand_encode (isa, o_opcode, i, &newval)
4506 || xtensa_operand_set_field (isa, o_opcode, i, o_fmt, 0,
4511 if (xtensa_format_set_slot (isa, o_fmt, 0, o_insnbuf, o_slotbuf))
4521 /* Attempt to widen an instruction. If the widening is valid, perform
4522 the action in-place directly into the contents and return TRUE. Otherwise,
4523 the return value is FALSE and the contents are not modified. */
4526 widen_instruction (bfd_byte *contents,
4527 bfd_size_type content_length,
4528 bfd_size_type offset)
4530 xtensa_opcode opcode;
4531 bfd_size_type insn_len;
4532 xtensa_isa isa = xtensa_default_isa;
4534 xtensa_insnbuf o_insnbuf;
4536 static xtensa_insnbuf insnbuf = NULL;
4537 static xtensa_insnbuf slotbuf = NULL;
4539 if (insnbuf == NULL)
4541 insnbuf = xtensa_insnbuf_alloc (isa);
4542 slotbuf = xtensa_insnbuf_alloc (isa);
4545 BFD_ASSERT (offset < content_length);
4547 if (content_length < 2)
4550 /* We will hand-code a few of these for a little while.
4551 These have all been specified in the assembler aleady. */
4552 xtensa_insnbuf_from_chars (isa, insnbuf, &contents[offset],
4553 content_length - offset);
4554 fmt = xtensa_format_decode (isa, insnbuf);
4555 if (xtensa_format_num_slots (isa, fmt) != 1)
4558 if (xtensa_format_get_slot (isa, fmt, 0, insnbuf, slotbuf) != 0)
4561 opcode = xtensa_opcode_decode (isa, fmt, 0, slotbuf);
4562 if (opcode == XTENSA_UNDEFINED)
4564 insn_len = xtensa_format_length (isa, fmt);
4565 if (insn_len > content_length)
4568 o_insnbuf = can_widen_instruction (slotbuf, fmt, opcode);
4571 xtensa_insnbuf_to_chars (isa, o_insnbuf, contents + offset,
4572 content_length - offset);
4579 /* Code for transforming CALLs at link-time. */
4581 static bfd_reloc_status_type
4582 elf_xtensa_do_asm_simplify (bfd_byte *contents,
4584 bfd_vma content_length,
4585 char **error_message)
4587 static xtensa_insnbuf insnbuf = NULL;
4588 static xtensa_insnbuf slotbuf = NULL;
4589 xtensa_format core_format = XTENSA_UNDEFINED;
4590 xtensa_opcode opcode;
4591 xtensa_opcode direct_call_opcode;
4592 xtensa_isa isa = xtensa_default_isa;
4593 bfd_byte *chbuf = contents + address;
4596 if (insnbuf == NULL)
4598 insnbuf = xtensa_insnbuf_alloc (isa);
4599 slotbuf = xtensa_insnbuf_alloc (isa);
4602 if (content_length < address)
4604 *error_message = _("attempt to convert L32R/CALLX to CALL failed");
4605 return bfd_reloc_other;
4608 opcode = get_expanded_call_opcode (chbuf, content_length - address, 0);
4609 direct_call_opcode = swap_callx_for_call_opcode (opcode);
4610 if (direct_call_opcode == XTENSA_UNDEFINED)
4612 *error_message = _("attempt to convert L32R/CALLX to CALL failed");
4613 return bfd_reloc_other;
4616 /* Assemble a NOP ("or a1, a1, a1") into the 0 byte offset. */
4617 core_format = xtensa_format_lookup (isa, "x24");
4618 opcode = xtensa_opcode_lookup (isa, "or");
4619 xtensa_opcode_encode (isa, core_format, 0, slotbuf, opcode);
4620 for (opn = 0; opn < 3; opn++)
4623 xtensa_operand_encode (isa, opcode, opn, ®no);
4624 xtensa_operand_set_field (isa, opcode, opn, core_format, 0,
4627 xtensa_format_encode (isa, core_format, insnbuf);
4628 xtensa_format_set_slot (isa, core_format, 0, insnbuf, slotbuf);
4629 xtensa_insnbuf_to_chars (isa, insnbuf, chbuf, content_length - address);
4631 /* Assemble a CALL ("callN 0") into the 3 byte offset. */
4632 xtensa_opcode_encode (isa, core_format, 0, slotbuf, direct_call_opcode);
4633 xtensa_operand_set_field (isa, opcode, 0, core_format, 0, slotbuf, 0);
4635 xtensa_format_encode (isa, core_format, insnbuf);
4636 xtensa_format_set_slot (isa, core_format, 0, insnbuf, slotbuf);
4637 xtensa_insnbuf_to_chars (isa, insnbuf, chbuf + 3,
4638 content_length - address - 3);
4640 return bfd_reloc_ok;
4644 static bfd_reloc_status_type
4645 contract_asm_expansion (bfd_byte *contents,
4646 bfd_vma content_length,
4647 Elf_Internal_Rela *irel,
4648 char **error_message)
4650 bfd_reloc_status_type retval =
4651 elf_xtensa_do_asm_simplify (contents, irel->r_offset, content_length,
4654 if (retval != bfd_reloc_ok)
4655 return bfd_reloc_dangerous;
4657 /* Update the irel->r_offset field so that the right immediate and
4658 the right instruction are modified during the relocation. */
4659 irel->r_offset += 3;
4660 irel->r_info = ELF32_R_INFO (ELF32_R_SYM (irel->r_info), R_XTENSA_SLOT0_OP);
4661 return bfd_reloc_ok;
4665 static xtensa_opcode
4666 swap_callx_for_call_opcode (xtensa_opcode opcode)
4668 init_call_opcodes ();
4670 if (opcode == callx0_op) return call0_op;
4671 if (opcode == callx4_op) return call4_op;
4672 if (opcode == callx8_op) return call8_op;
4673 if (opcode == callx12_op) return call12_op;
4675 /* Return XTENSA_UNDEFINED if the opcode is not an indirect call. */
4676 return XTENSA_UNDEFINED;
4680 /* Check if "buf" is pointing to a "L32R aN; CALLX aN" or "CONST16 aN;
4681 CONST16 aN; CALLX aN" sequence, and if so, return the CALLX opcode.
4682 If not, return XTENSA_UNDEFINED. */
4684 #define L32R_TARGET_REG_OPERAND 0
4685 #define CONST16_TARGET_REG_OPERAND 0
4686 #define CALLN_SOURCE_OPERAND 0
4688 static xtensa_opcode
4689 get_expanded_call_opcode (bfd_byte *buf, int bufsize, bfd_boolean *p_uses_l32r)
4691 static xtensa_insnbuf insnbuf = NULL;
4692 static xtensa_insnbuf slotbuf = NULL;
4694 xtensa_opcode opcode;
4695 xtensa_isa isa = xtensa_default_isa;
4696 uint32 regno, const16_regno, call_regno;
4699 if (insnbuf == NULL)
4701 insnbuf = xtensa_insnbuf_alloc (isa);
4702 slotbuf = xtensa_insnbuf_alloc (isa);
4705 xtensa_insnbuf_from_chars (isa, insnbuf, buf, bufsize);
4706 fmt = xtensa_format_decode (isa, insnbuf);
4707 if (fmt == XTENSA_UNDEFINED
4708 || xtensa_format_get_slot (isa, fmt, 0, insnbuf, slotbuf))
4709 return XTENSA_UNDEFINED;
4711 opcode = xtensa_opcode_decode (isa, fmt, 0, slotbuf);
4712 if (opcode == XTENSA_UNDEFINED)
4713 return XTENSA_UNDEFINED;
4715 if (opcode == get_l32r_opcode ())
4718 *p_uses_l32r = TRUE;
4719 if (xtensa_operand_get_field (isa, opcode, L32R_TARGET_REG_OPERAND,
4720 fmt, 0, slotbuf, ®no)
4721 || xtensa_operand_decode (isa, opcode, L32R_TARGET_REG_OPERAND,
4723 return XTENSA_UNDEFINED;
4725 else if (opcode == get_const16_opcode ())
4728 *p_uses_l32r = FALSE;
4729 if (xtensa_operand_get_field (isa, opcode, CONST16_TARGET_REG_OPERAND,
4730 fmt, 0, slotbuf, ®no)
4731 || xtensa_operand_decode (isa, opcode, CONST16_TARGET_REG_OPERAND,
4733 return XTENSA_UNDEFINED;
4735 /* Check that the next instruction is also CONST16. */
4736 offset += xtensa_format_length (isa, fmt);
4737 xtensa_insnbuf_from_chars (isa, insnbuf, buf + offset, bufsize - offset);
4738 fmt = xtensa_format_decode (isa, insnbuf);
4739 if (fmt == XTENSA_UNDEFINED
4740 || xtensa_format_get_slot (isa, fmt, 0, insnbuf, slotbuf))
4741 return XTENSA_UNDEFINED;
4742 opcode = xtensa_opcode_decode (isa, fmt, 0, slotbuf);
4743 if (opcode != get_const16_opcode ())
4744 return XTENSA_UNDEFINED;
4746 if (xtensa_operand_get_field (isa, opcode, CONST16_TARGET_REG_OPERAND,
4747 fmt, 0, slotbuf, &const16_regno)
4748 || xtensa_operand_decode (isa, opcode, CONST16_TARGET_REG_OPERAND,
4750 || const16_regno != regno)
4751 return XTENSA_UNDEFINED;
4754 return XTENSA_UNDEFINED;
4756 /* Next instruction should be an CALLXn with operand 0 == regno. */
4757 offset += xtensa_format_length (isa, fmt);
4758 xtensa_insnbuf_from_chars (isa, insnbuf, buf + offset, bufsize - offset);
4759 fmt = xtensa_format_decode (isa, insnbuf);
4760 if (fmt == XTENSA_UNDEFINED
4761 || xtensa_format_get_slot (isa, fmt, 0, insnbuf, slotbuf))
4762 return XTENSA_UNDEFINED;
4763 opcode = xtensa_opcode_decode (isa, fmt, 0, slotbuf);
4764 if (opcode == XTENSA_UNDEFINED
4765 || !is_indirect_call_opcode (opcode))
4766 return XTENSA_UNDEFINED;
4768 if (xtensa_operand_get_field (isa, opcode, CALLN_SOURCE_OPERAND,
4769 fmt, 0, slotbuf, &call_regno)
4770 || xtensa_operand_decode (isa, opcode, CALLN_SOURCE_OPERAND,
4772 return XTENSA_UNDEFINED;
4774 if (call_regno != regno)
4775 return XTENSA_UNDEFINED;
4781 /* Data structures used during relaxation. */
4783 /* r_reloc: relocation values. */
4785 /* Through the relaxation process, we need to keep track of the values
4786 that will result from evaluating relocations. The standard ELF
4787 relocation structure is not sufficient for this purpose because we're
4788 operating on multiple input files at once, so we need to know which
4789 input file a relocation refers to. The r_reloc structure thus
4790 records both the input file (bfd) and ELF relocation.
4792 For efficiency, an r_reloc also contains a "target_offset" field to
4793 cache the target-section-relative offset value that is represented by
4796 The r_reloc also contains a virtual offset that allows multiple
4797 inserted literals to be placed at the same "address" with
4798 different offsets. */
4800 typedef struct r_reloc_struct r_reloc;
4802 struct r_reloc_struct
4805 Elf_Internal_Rela rela;
4806 bfd_vma target_offset;
4807 bfd_vma virtual_offset;
4811 /* The r_reloc structure is included by value in literal_value, but not
4812 every literal_value has an associated relocation -- some are simple
4813 constants. In such cases, we set all the fields in the r_reloc
4814 struct to zero. The r_reloc_is_const function should be used to
4815 detect this case. */
4818 r_reloc_is_const (const r_reloc *r_rel)
4820 return (r_rel->abfd == NULL);
4825 r_reloc_get_target_offset (const r_reloc *r_rel)
4827 bfd_vma target_offset;
4828 unsigned long r_symndx;
4830 BFD_ASSERT (!r_reloc_is_const (r_rel));
4831 r_symndx = ELF32_R_SYM (r_rel->rela.r_info);
4832 target_offset = get_elf_r_symndx_offset (r_rel->abfd, r_symndx);
4833 return (target_offset + r_rel->rela.r_addend);
4837 static struct elf_link_hash_entry *
4838 r_reloc_get_hash_entry (const r_reloc *r_rel)
4840 unsigned long r_symndx = ELF32_R_SYM (r_rel->rela.r_info);
4841 return get_elf_r_symndx_hash_entry (r_rel->abfd, r_symndx);
4846 r_reloc_get_section (const r_reloc *r_rel)
4848 unsigned long r_symndx = ELF32_R_SYM (r_rel->rela.r_info);
4849 return get_elf_r_symndx_section (r_rel->abfd, r_symndx);
4854 r_reloc_is_defined (const r_reloc *r_rel)
4860 sec = r_reloc_get_section (r_rel);
4861 if (sec == bfd_abs_section_ptr
4862 || sec == bfd_com_section_ptr
4863 || sec == bfd_und_section_ptr)
4870 r_reloc_init (r_reloc *r_rel,
4872 Elf_Internal_Rela *irel,
4874 bfd_size_type content_length)
4877 reloc_howto_type *howto;
4881 r_rel->rela = *irel;
4883 r_rel->target_offset = r_reloc_get_target_offset (r_rel);
4884 r_rel->virtual_offset = 0;
4885 r_type = ELF32_R_TYPE (r_rel->rela.r_info);
4886 howto = &elf_howto_table[r_type];
4887 if (howto->partial_inplace)
4889 bfd_vma inplace_val;
4890 BFD_ASSERT (r_rel->rela.r_offset < content_length);
4892 inplace_val = bfd_get_32 (abfd, &contents[r_rel->rela.r_offset]);
4893 r_rel->target_offset += inplace_val;
4897 memset (r_rel, 0, sizeof (r_reloc));
4904 print_r_reloc (FILE *fp, const r_reloc *r_rel)
4906 if (r_reloc_is_defined (r_rel))
4908 asection *sec = r_reloc_get_section (r_rel);
4909 fprintf (fp, " %s(%s + ", sec->owner->filename, sec->name);
4911 else if (r_reloc_get_hash_entry (r_rel))
4912 fprintf (fp, " %s + ", r_reloc_get_hash_entry (r_rel)->root.root.string);
4914 fprintf (fp, " ?? + ");
4916 fprintf_vma (fp, r_rel->target_offset);
4917 if (r_rel->virtual_offset)
4919 fprintf (fp, " + ");
4920 fprintf_vma (fp, r_rel->virtual_offset);
4929 /* source_reloc: relocations that reference literals. */
4931 /* To determine whether literals can be coalesced, we need to first
4932 record all the relocations that reference the literals. The
4933 source_reloc structure below is used for this purpose. The
4934 source_reloc entries are kept in a per-literal-section array, sorted
4935 by offset within the literal section (i.e., target offset).
4937 The source_sec and r_rel.rela.r_offset fields identify the source of
4938 the relocation. The r_rel field records the relocation value, i.e.,
4939 the offset of the literal being referenced. The opnd field is needed
4940 to determine the range of the immediate field to which the relocation
4941 applies, so we can determine whether another literal with the same
4942 value is within range. The is_null field is true when the relocation
4943 is being removed (e.g., when an L32R is being removed due to a CALLX
4944 that is converted to a direct CALL). */
4946 typedef struct source_reloc_struct source_reloc;
4948 struct source_reloc_struct
4950 asection *source_sec;
4952 xtensa_opcode opcode;
4954 bfd_boolean is_null;
4955 bfd_boolean is_abs_literal;
4960 init_source_reloc (source_reloc *reloc,
4961 asection *source_sec,
4962 const r_reloc *r_rel,
4963 xtensa_opcode opcode,
4965 bfd_boolean is_abs_literal)
4967 reloc->source_sec = source_sec;
4968 reloc->r_rel = *r_rel;
4969 reloc->opcode = opcode;
4971 reloc->is_null = FALSE;
4972 reloc->is_abs_literal = is_abs_literal;
4976 /* Find the source_reloc for a particular source offset and relocation
4977 type. Note that the array is sorted by _target_ offset, so this is
4978 just a linear search. */
4980 static source_reloc *
4981 find_source_reloc (source_reloc *src_relocs,
4984 Elf_Internal_Rela *irel)
4988 for (i = 0; i < src_count; i++)
4990 if (src_relocs[i].source_sec == sec
4991 && src_relocs[i].r_rel.rela.r_offset == irel->r_offset
4992 && (ELF32_R_TYPE (src_relocs[i].r_rel.rela.r_info)
4993 == ELF32_R_TYPE (irel->r_info)))
4994 return &src_relocs[i];
5002 source_reloc_compare (const void *ap, const void *bp)
5004 const source_reloc *a = (const source_reloc *) ap;
5005 const source_reloc *b = (const source_reloc *) bp;
5007 if (a->r_rel.target_offset != b->r_rel.target_offset)
5008 return (a->r_rel.target_offset - b->r_rel.target_offset);
5010 /* We don't need to sort on these criteria for correctness,
5011 but enforcing a more strict ordering prevents unstable qsort
5012 from behaving differently with different implementations.
5013 Without the code below we get correct but different results
5014 on Solaris 2.7 and 2.8. We would like to always produce the
5015 same results no matter the host. */
5017 if ((!a->is_null) - (!b->is_null))
5018 return ((!a->is_null) - (!b->is_null));
5019 return internal_reloc_compare (&a->r_rel.rela, &b->r_rel.rela);
5023 /* Literal values and value hash tables. */
5025 /* Literals with the same value can be coalesced. The literal_value
5026 structure records the value of a literal: the "r_rel" field holds the
5027 information from the relocation on the literal (if there is one) and
5028 the "value" field holds the contents of the literal word itself.
5030 The value_map structure records a literal value along with the
5031 location of a literal holding that value. The value_map hash table
5032 is indexed by the literal value, so that we can quickly check if a
5033 particular literal value has been seen before and is thus a candidate
5036 typedef struct literal_value_struct literal_value;
5037 typedef struct value_map_struct value_map;
5038 typedef struct value_map_hash_table_struct value_map_hash_table;
5040 struct literal_value_struct
5043 unsigned long value;
5044 bfd_boolean is_abs_literal;
5047 struct value_map_struct
5049 literal_value val; /* The literal value. */
5050 r_reloc loc; /* Location of the literal. */
5054 struct value_map_hash_table_struct
5056 unsigned bucket_count;
5057 value_map **buckets;
5059 bfd_boolean has_last_loc;
5065 init_literal_value (literal_value *lit,
5066 const r_reloc *r_rel,
5067 unsigned long value,
5068 bfd_boolean is_abs_literal)
5070 lit->r_rel = *r_rel;
5072 lit->is_abs_literal = is_abs_literal;
5077 literal_value_equal (const literal_value *src1,
5078 const literal_value *src2,
5079 bfd_boolean final_static_link)
5081 struct elf_link_hash_entry *h1, *h2;
5083 if (r_reloc_is_const (&src1->r_rel) != r_reloc_is_const (&src2->r_rel))
5086 if (r_reloc_is_const (&src1->r_rel))
5087 return (src1->value == src2->value);
5089 if (ELF32_R_TYPE (src1->r_rel.rela.r_info)
5090 != ELF32_R_TYPE (src2->r_rel.rela.r_info))
5093 if (src1->r_rel.target_offset != src2->r_rel.target_offset)
5096 if (src1->r_rel.virtual_offset != src2->r_rel.virtual_offset)
5099 if (src1->value != src2->value)
5102 /* Now check for the same section (if defined) or the same elf_hash
5103 (if undefined or weak). */
5104 h1 = r_reloc_get_hash_entry (&src1->r_rel);
5105 h2 = r_reloc_get_hash_entry (&src2->r_rel);
5106 if (r_reloc_is_defined (&src1->r_rel)
5107 && (final_static_link
5108 || ((!h1 || h1->root.type != bfd_link_hash_defweak)
5109 && (!h2 || h2->root.type != bfd_link_hash_defweak))))
5111 if (r_reloc_get_section (&src1->r_rel)
5112 != r_reloc_get_section (&src2->r_rel))
5117 /* Require that the hash entries (i.e., symbols) be identical. */
5118 if (h1 != h2 || h1 == 0)
5122 if (src1->is_abs_literal != src2->is_abs_literal)
5129 /* Must be power of 2. */
5130 #define INITIAL_HASH_RELOC_BUCKET_COUNT 1024
5132 static value_map_hash_table *
5133 value_map_hash_table_init (void)
5135 value_map_hash_table *values;
5137 values = (value_map_hash_table *)
5138 bfd_zmalloc (sizeof (value_map_hash_table));
5139 values->bucket_count = INITIAL_HASH_RELOC_BUCKET_COUNT;
5141 values->buckets = (value_map **)
5142 bfd_zmalloc (sizeof (value_map *) * values->bucket_count);
5143 if (values->buckets == NULL)
5148 values->has_last_loc = FALSE;
5155 value_map_hash_table_delete (value_map_hash_table *table)
5157 free (table->buckets);
5163 hash_bfd_vma (bfd_vma val)
5165 return (val >> 2) + (val >> 10);
5170 literal_value_hash (const literal_value *src)
5174 hash_val = hash_bfd_vma (src->value);
5175 if (!r_reloc_is_const (&src->r_rel))
5179 hash_val += hash_bfd_vma (src->is_abs_literal * 1000);
5180 hash_val += hash_bfd_vma (src->r_rel.target_offset);
5181 hash_val += hash_bfd_vma (src->r_rel.virtual_offset);
5183 /* Now check for the same section and the same elf_hash. */
5184 if (r_reloc_is_defined (&src->r_rel))
5185 sec_or_hash = r_reloc_get_section (&src->r_rel);
5187 sec_or_hash = r_reloc_get_hash_entry (&src->r_rel);
5188 hash_val += hash_bfd_vma ((bfd_vma) (size_t) sec_or_hash);
5194 /* Check if the specified literal_value has been seen before. */
5197 value_map_get_cached_value (value_map_hash_table *map,
5198 const literal_value *val,
5199 bfd_boolean final_static_link)
5205 idx = literal_value_hash (val);
5206 idx = idx & (map->bucket_count - 1);
5207 bucket = map->buckets[idx];
5208 for (map_e = bucket; map_e; map_e = map_e->next)
5210 if (literal_value_equal (&map_e->val, val, final_static_link))
5217 /* Record a new literal value. It is illegal to call this if VALUE
5218 already has an entry here. */
5221 add_value_map (value_map_hash_table *map,
5222 const literal_value *val,
5224 bfd_boolean final_static_link)
5226 value_map **bucket_p;
5229 value_map *val_e = (value_map *) bfd_zmalloc (sizeof (value_map));
5232 bfd_set_error (bfd_error_no_memory);
5236 BFD_ASSERT (!value_map_get_cached_value (map, val, final_static_link));
5240 idx = literal_value_hash (val);
5241 idx = idx & (map->bucket_count - 1);
5242 bucket_p = &map->buckets[idx];
5244 val_e->next = *bucket_p;
5247 /* FIXME: Consider resizing the hash table if we get too many entries. */
5253 /* Lists of text actions (ta_) for narrowing, widening, longcall
5254 conversion, space fill, code & literal removal, etc. */
5256 /* The following text actions are generated:
5258 "ta_remove_insn" remove an instruction or instructions
5259 "ta_remove_longcall" convert longcall to call
5260 "ta_convert_longcall" convert longcall to nop/call
5261 "ta_narrow_insn" narrow a wide instruction
5262 "ta_widen" widen a narrow instruction
5263 "ta_fill" add fill or remove fill
5264 removed < 0 is a fill; branches to the fill address will be
5265 changed to address + fill size (e.g., address - removed)
5266 removed >= 0 branches to the fill address will stay unchanged
5267 "ta_remove_literal" remove a literal; this action is
5268 indicated when a literal is removed
5270 "ta_add_literal" insert a new literal; this action is
5271 indicated when a literal has been moved.
5272 It may use a virtual_offset because
5273 multiple literals can be placed at the
5276 For each of these text actions, we also record the number of bytes
5277 removed by performing the text action. In the case of a "ta_widen"
5278 or a "ta_fill" that adds space, the removed_bytes will be negative. */
5280 typedef struct text_action_struct text_action;
5281 typedef struct text_action_list_struct text_action_list;
5282 typedef enum text_action_enum_t text_action_t;
5284 enum text_action_enum_t
5287 ta_remove_insn, /* removed = -size */
5288 ta_remove_longcall, /* removed = -size */
5289 ta_convert_longcall, /* removed = 0 */
5290 ta_narrow_insn, /* removed = -1 */
5291 ta_widen_insn, /* removed = +1 */
5292 ta_fill, /* removed = +size */
5298 /* Structure for a text action record. */
5299 struct text_action_struct
5301 text_action_t action;
5302 asection *sec; /* Optional */
5304 bfd_vma virtual_offset; /* Zero except for adding literals. */
5306 literal_value value; /* Only valid when adding literals. */
5309 struct removal_by_action_entry_struct
5314 int eq_removed_before_fill;
5316 typedef struct removal_by_action_entry_struct removal_by_action_entry;
5318 struct removal_by_action_map_struct
5321 removal_by_action_entry *entry;
5323 typedef struct removal_by_action_map_struct removal_by_action_map;
5326 /* List of all of the actions taken on a text section. */
5327 struct text_action_list_struct
5331 removal_by_action_map map;
5335 static text_action *
5336 find_fill_action (text_action_list *l, asection *sec, bfd_vma offset)
5340 /* It is not necessary to fill at the end of a section. */
5341 if (sec->size == offset)
5347 splay_tree_node node = splay_tree_lookup (l->tree, (splay_tree_key)&a);
5349 return (text_action *)node->value;
5355 compute_removed_action_diff (const text_action *ta,
5359 int removable_space)
5362 int current_removed = 0;
5365 current_removed = ta->removed_bytes;
5367 BFD_ASSERT (ta == NULL || ta->offset == offset);
5368 BFD_ASSERT (ta == NULL || ta->action == ta_fill);
5370 /* It is not necessary to fill at the end of a section. Clean this up. */
5371 if (sec->size == offset)
5372 new_removed = removable_space - 0;
5376 int added = -removed - current_removed;
5377 /* Ignore multiples of the section alignment. */
5378 added = ((1 << sec->alignment_power) - 1) & added;
5379 new_removed = (-added);
5381 /* Modify for removable. */
5382 space = removable_space - new_removed;
5383 new_removed = (removable_space
5384 - (((1 << sec->alignment_power) - 1) & space));
5386 return (new_removed - current_removed);
5391 adjust_fill_action (text_action *ta, int fill_diff)
5393 ta->removed_bytes += fill_diff;
5398 text_action_compare (splay_tree_key a, splay_tree_key b)
5400 text_action *pa = (text_action *)a;
5401 text_action *pb = (text_action *)b;
5402 static const int action_priority[] =
5406 [ta_convert_longcall] = 2,
5407 [ta_narrow_insn] = 3,
5408 [ta_remove_insn] = 4,
5409 [ta_remove_longcall] = 5,
5410 [ta_remove_literal] = 6,
5411 [ta_widen_insn] = 7,
5412 [ta_add_literal] = 8,
5415 if (pa->offset == pb->offset)
5417 if (pa->action == pb->action)
5419 return action_priority[pa->action] - action_priority[pb->action];
5422 return pa->offset < pb->offset ? -1 : 1;
5425 static text_action *
5426 action_first (text_action_list *action_list)
5428 splay_tree_node node = splay_tree_min (action_list->tree);
5429 return node ? (text_action *)node->value : NULL;
5432 static text_action *
5433 action_next (text_action_list *action_list, text_action *action)
5435 splay_tree_node node = splay_tree_successor (action_list->tree,
5436 (splay_tree_key)action);
5437 return node ? (text_action *)node->value : NULL;
5440 /* Add a modification action to the text. For the case of adding or
5441 removing space, modify any current fill and assume that
5442 "unreachable_space" bytes can be freely contracted. Note that a
5443 negative removed value is a fill. */
5446 text_action_add (text_action_list *l,
5447 text_action_t action,
5455 /* It is not necessary to fill at the end of a section. */
5456 if (action == ta_fill && sec->size == offset)
5459 /* It is not necessary to fill 0 bytes. */
5460 if (action == ta_fill && removed == 0)
5466 if (action == ta_fill)
5468 splay_tree_node node = splay_tree_lookup (l->tree, (splay_tree_key)&a);
5472 ta = (text_action *)node->value;
5473 ta->removed_bytes += removed;
5478 BFD_ASSERT (splay_tree_lookup (l->tree, (splay_tree_key)&a) == NULL);
5480 ta = (text_action *) bfd_zmalloc (sizeof (text_action));
5481 ta->action = action;
5483 ta->offset = offset;
5484 ta->removed_bytes = removed;
5485 splay_tree_insert (l->tree, (splay_tree_key)ta, (splay_tree_value)ta);
5491 text_action_add_literal (text_action_list *l,
5492 text_action_t action,
5494 const literal_value *value,
5498 asection *sec = r_reloc_get_section (loc);
5499 bfd_vma offset = loc->target_offset;
5500 bfd_vma virtual_offset = loc->virtual_offset;
5502 BFD_ASSERT (action == ta_add_literal);
5504 /* Create a new record and fill it up. */
5505 ta = (text_action *) bfd_zmalloc (sizeof (text_action));
5506 ta->action = action;
5508 ta->offset = offset;
5509 ta->virtual_offset = virtual_offset;
5511 ta->removed_bytes = removed;
5513 BFD_ASSERT (splay_tree_lookup (l->tree, (splay_tree_key)ta) == NULL);
5514 splay_tree_insert (l->tree, (splay_tree_key)ta, (splay_tree_value)ta);
5519 /* Find the total offset adjustment for the relaxations specified by
5520 text_actions, beginning from a particular starting action. This is
5521 typically used from offset_with_removed_text to search an entire list of
5522 actions, but it may also be called directly when adjusting adjacent offsets
5523 so that each search may begin where the previous one left off. */
5526 removed_by_actions (text_action_list *action_list,
5527 text_action **p_start_action,
5529 bfd_boolean before_fill)
5534 r = *p_start_action;
5537 splay_tree_node node = splay_tree_lookup (action_list->tree,
5539 BFD_ASSERT (node != NULL && r == (text_action *)node->value);
5544 if (r->offset > offset)
5547 if (r->offset == offset
5548 && (before_fill || r->action != ta_fill || r->removed_bytes >= 0))
5551 removed += r->removed_bytes;
5553 r = action_next (action_list, r);
5556 *p_start_action = r;
5562 offset_with_removed_text (text_action_list *action_list, bfd_vma offset)
5564 text_action *r = action_first (action_list);
5566 return offset - removed_by_actions (action_list, &r, offset, FALSE);
5571 action_list_count (text_action_list *action_list)
5573 return action_list->count;
5576 typedef struct map_action_fn_context_struct map_action_fn_context;
5577 struct map_action_fn_context_struct
5580 removal_by_action_map map;
5581 bfd_boolean eq_complete;
5585 map_action_fn (splay_tree_node node, void *p)
5587 map_action_fn_context *ctx = p;
5588 text_action *r = (text_action *)node->value;
5589 removal_by_action_entry *ientry = ctx->map.entry + ctx->map.n_entries;
5591 if (ctx->map.n_entries && (ientry - 1)->offset == r->offset)
5597 ++ctx->map.n_entries;
5598 ctx->eq_complete = FALSE;
5599 ientry->offset = r->offset;
5600 ientry->eq_removed_before_fill = ctx->removed;
5603 if (!ctx->eq_complete)
5605 if (r->action != ta_fill || r->removed_bytes >= 0)
5607 ientry->eq_removed = ctx->removed;
5608 ctx->eq_complete = TRUE;
5611 ientry->eq_removed = ctx->removed + r->removed_bytes;
5614 ctx->removed += r->removed_bytes;
5615 ientry->removed = ctx->removed;
5620 map_removal_by_action (text_action_list *action_list)
5622 map_action_fn_context ctx;
5625 ctx.map.n_entries = 0;
5626 ctx.map.entry = bfd_malloc (action_list_count (action_list) *
5627 sizeof (removal_by_action_entry));
5628 ctx.eq_complete = FALSE;
5630 splay_tree_foreach (action_list->tree, map_action_fn, &ctx);
5631 action_list->map = ctx.map;
5635 removed_by_actions_map (text_action_list *action_list, bfd_vma offset,
5636 bfd_boolean before_fill)
5640 if (!action_list->map.entry)
5641 map_removal_by_action (action_list);
5643 if (!action_list->map.n_entries)
5647 b = action_list->map.n_entries;
5651 unsigned c = (a + b) / 2;
5653 if (action_list->map.entry[c].offset <= offset)
5659 if (action_list->map.entry[a].offset < offset)
5661 return action_list->map.entry[a].removed;
5663 else if (action_list->map.entry[a].offset == offset)
5665 return before_fill ?
5666 action_list->map.entry[a].eq_removed_before_fill :
5667 action_list->map.entry[a].eq_removed;
5676 offset_with_removed_text_map (text_action_list *action_list, bfd_vma offset)
5678 int removed = removed_by_actions_map (action_list, offset, FALSE);
5679 return offset - removed;
5683 /* The find_insn_action routine will only find non-fill actions. */
5685 static text_action *
5686 find_insn_action (text_action_list *action_list, bfd_vma offset)
5688 static const text_action_t action[] =
5690 ta_convert_longcall,
5700 for (i = 0; i < sizeof (action) / sizeof (*action); ++i)
5702 splay_tree_node node;
5704 a.action = action[i];
5705 node = splay_tree_lookup (action_list->tree, (splay_tree_key)&a);
5707 return (text_action *)node->value;
5716 print_action (FILE *fp, text_action *r)
5718 const char *t = "unknown";
5721 case ta_remove_insn:
5722 t = "remove_insn"; break;
5723 case ta_remove_longcall:
5724 t = "remove_longcall"; break;
5725 case ta_convert_longcall:
5726 t = "convert_longcall"; break;
5727 case ta_narrow_insn:
5728 t = "narrow_insn"; break;
5730 t = "widen_insn"; break;
5735 case ta_remove_literal:
5736 t = "remove_literal"; break;
5737 case ta_add_literal:
5738 t = "add_literal"; break;
5741 fprintf (fp, "%s: %s[0x%lx] \"%s\" %d\n",
5742 r->sec->owner->filename,
5743 r->sec->name, (unsigned long) r->offset, t, r->removed_bytes);
5747 print_action_list_fn (splay_tree_node node, void *p)
5749 text_action *r = (text_action *)node->value;
5751 print_action (p, r);
5756 print_action_list (FILE *fp, text_action_list *action_list)
5758 fprintf (fp, "Text Action\n");
5759 splay_tree_foreach (action_list->tree, print_action_list_fn, fp);
5765 /* Lists of literals being coalesced or removed. */
5767 /* In the usual case, the literal identified by "from" is being
5768 coalesced with another literal identified by "to". If the literal is
5769 unused and is being removed altogether, "to.abfd" will be NULL.
5770 The removed_literal entries are kept on a per-section list, sorted
5771 by the "from" offset field. */
5773 typedef struct removed_literal_struct removed_literal;
5774 typedef struct removed_literal_map_entry_struct removed_literal_map_entry;
5775 typedef struct removed_literal_list_struct removed_literal_list;
5777 struct removed_literal_struct
5781 removed_literal *next;
5784 struct removed_literal_map_entry_struct
5787 removed_literal *literal;
5790 struct removed_literal_list_struct
5792 removed_literal *head;
5793 removed_literal *tail;
5796 removed_literal_map_entry *map;
5800 /* Record that the literal at "from" is being removed. If "to" is not
5801 NULL, the "from" literal is being coalesced with the "to" literal. */
5804 add_removed_literal (removed_literal_list *removed_list,
5805 const r_reloc *from,
5808 removed_literal *r, *new_r, *next_r;
5810 new_r = (removed_literal *) bfd_zmalloc (sizeof (removed_literal));
5812 new_r->from = *from;
5816 new_r->to.abfd = NULL;
5819 r = removed_list->head;
5822 removed_list->head = new_r;
5823 removed_list->tail = new_r;
5825 /* Special check for common case of append. */
5826 else if (removed_list->tail->from.target_offset < from->target_offset)
5828 removed_list->tail->next = new_r;
5829 removed_list->tail = new_r;
5833 while (r->from.target_offset < from->target_offset && r->next)
5839 new_r->next = next_r;
5841 removed_list->tail = new_r;
5846 map_removed_literal (removed_literal_list *removed_list)
5850 removed_literal_map_entry *map = NULL;
5851 removed_literal *r = removed_list->head;
5853 for (i = 0; r; ++i, r = r->next)
5857 n_map = (n_map * 2) + 2;
5858 map = bfd_realloc (map, n_map * sizeof (*map));
5860 map[i].addr = r->from.target_offset;
5863 removed_list->map = map;
5864 removed_list->n_map = i;
5868 removed_literal_compare (const void *a, const void *b)
5870 const removed_literal_map_entry *pa = a;
5871 const removed_literal_map_entry *pb = b;
5873 if (pa->addr == pb->addr)
5876 return pa->addr < pb->addr ? -1 : 1;
5879 /* Check if the list of removed literals contains an entry for the
5880 given address. Return the entry if found. */
5882 static removed_literal *
5883 find_removed_literal (removed_literal_list *removed_list, bfd_vma addr)
5885 removed_literal_map_entry *p;
5886 removed_literal *r = NULL;
5888 if (removed_list->map == NULL)
5889 map_removed_literal (removed_list);
5891 p = bsearch (&addr, removed_list->map, removed_list->n_map,
5892 sizeof (*removed_list->map), removed_literal_compare);
5895 while (p != removed_list->map && (p - 1)->addr == addr)
5906 print_removed_literals (FILE *fp, removed_literal_list *removed_list)
5909 r = removed_list->head;
5911 fprintf (fp, "Removed Literals\n");
5912 for (; r != NULL; r = r->next)
5914 print_r_reloc (fp, &r->from);
5915 fprintf (fp, " => ");
5916 if (r->to.abfd == NULL)
5917 fprintf (fp, "REMOVED");
5919 print_r_reloc (fp, &r->to);
5927 /* Per-section data for relaxation. */
5929 typedef struct reloc_bfd_fix_struct reloc_bfd_fix;
5931 struct xtensa_relax_info_struct
5933 bfd_boolean is_relaxable_literal_section;
5934 bfd_boolean is_relaxable_asm_section;
5935 int visited; /* Number of times visited. */
5937 source_reloc *src_relocs; /* Array[src_count]. */
5939 int src_next; /* Next src_relocs entry to assign. */
5941 removed_literal_list removed_list;
5942 text_action_list action_list;
5944 reloc_bfd_fix *fix_list;
5945 reloc_bfd_fix *fix_array;
5946 unsigned fix_array_count;
5948 /* Support for expanding the reloc array that is stored
5949 in the section structure. If the relocations have been
5950 reallocated, the newly allocated relocations will be referenced
5951 here along with the actual size allocated. The relocation
5952 count will always be found in the section structure. */
5953 Elf_Internal_Rela *allocated_relocs;
5954 unsigned relocs_count;
5955 unsigned allocated_relocs_count;
5958 struct elf_xtensa_section_data
5960 struct bfd_elf_section_data elf;
5961 xtensa_relax_info relax_info;
5966 elf_xtensa_new_section_hook (bfd *abfd, asection *sec)
5968 if (!sec->used_by_bfd)
5970 struct elf_xtensa_section_data *sdata;
5971 bfd_size_type amt = sizeof (*sdata);
5973 sdata = bfd_zalloc (abfd, amt);
5976 sec->used_by_bfd = sdata;
5979 return _bfd_elf_new_section_hook (abfd, sec);
5983 static xtensa_relax_info *
5984 get_xtensa_relax_info (asection *sec)
5986 struct elf_xtensa_section_data *section_data;
5988 /* No info available if no section or if it is an output section. */
5989 if (!sec || sec == sec->output_section)
5992 section_data = (struct elf_xtensa_section_data *) elf_section_data (sec);
5993 return §ion_data->relax_info;
5998 init_xtensa_relax_info (asection *sec)
6000 xtensa_relax_info *relax_info = get_xtensa_relax_info (sec);
6002 relax_info->is_relaxable_literal_section = FALSE;
6003 relax_info->is_relaxable_asm_section = FALSE;
6004 relax_info->visited = 0;
6006 relax_info->src_relocs = NULL;
6007 relax_info->src_count = 0;
6008 relax_info->src_next = 0;
6010 relax_info->removed_list.head = NULL;
6011 relax_info->removed_list.tail = NULL;
6013 relax_info->action_list.tree = splay_tree_new (text_action_compare,
6015 relax_info->action_list.map.n_entries = 0;
6016 relax_info->action_list.map.entry = NULL;
6018 relax_info->fix_list = NULL;
6019 relax_info->fix_array = NULL;
6020 relax_info->fix_array_count = 0;
6022 relax_info->allocated_relocs = NULL;
6023 relax_info->relocs_count = 0;
6024 relax_info->allocated_relocs_count = 0;
6028 /* Coalescing literals may require a relocation to refer to a section in
6029 a different input file, but the standard relocation information
6030 cannot express that. Instead, the reloc_bfd_fix structures are used
6031 to "fix" the relocations that refer to sections in other input files.
6032 These structures are kept on per-section lists. The "src_type" field
6033 records the relocation type in case there are multiple relocations on
6034 the same location. FIXME: This is ugly; an alternative might be to
6035 add new symbols with the "owner" field to some other input file. */
6037 struct reloc_bfd_fix_struct
6041 unsigned src_type; /* Relocation type. */
6043 asection *target_sec;
6044 bfd_vma target_offset;
6045 bfd_boolean translated;
6047 reloc_bfd_fix *next;
6051 static reloc_bfd_fix *
6052 reloc_bfd_fix_init (asection *src_sec,
6055 asection *target_sec,
6056 bfd_vma target_offset,
6057 bfd_boolean translated)
6061 fix = (reloc_bfd_fix *) bfd_malloc (sizeof (reloc_bfd_fix));
6062 fix->src_sec = src_sec;
6063 fix->src_offset = src_offset;
6064 fix->src_type = src_type;
6065 fix->target_sec = target_sec;
6066 fix->target_offset = target_offset;
6067 fix->translated = translated;
6074 add_fix (asection *src_sec, reloc_bfd_fix *fix)
6076 xtensa_relax_info *relax_info;
6078 relax_info = get_xtensa_relax_info (src_sec);
6079 fix->next = relax_info->fix_list;
6080 relax_info->fix_list = fix;
6085 fix_compare (const void *ap, const void *bp)
6087 const reloc_bfd_fix *a = (const reloc_bfd_fix *) ap;
6088 const reloc_bfd_fix *b = (const reloc_bfd_fix *) bp;
6090 if (a->src_offset != b->src_offset)
6091 return (a->src_offset - b->src_offset);
6092 return (a->src_type - b->src_type);
6097 cache_fix_array (asection *sec)
6099 unsigned i, count = 0;
6101 xtensa_relax_info *relax_info = get_xtensa_relax_info (sec);
6103 if (relax_info == NULL)
6105 if (relax_info->fix_list == NULL)
6108 for (r = relax_info->fix_list; r != NULL; r = r->next)
6111 relax_info->fix_array =
6112 (reloc_bfd_fix *) bfd_malloc (sizeof (reloc_bfd_fix) * count);
6113 relax_info->fix_array_count = count;
6115 r = relax_info->fix_list;
6116 for (i = 0; i < count; i++, r = r->next)
6118 relax_info->fix_array[count - 1 - i] = *r;
6119 relax_info->fix_array[count - 1 - i].next = NULL;
6122 qsort (relax_info->fix_array, relax_info->fix_array_count,
6123 sizeof (reloc_bfd_fix), fix_compare);
6127 static reloc_bfd_fix *
6128 get_bfd_fix (asection *sec, bfd_vma offset, unsigned type)
6130 xtensa_relax_info *relax_info = get_xtensa_relax_info (sec);
6134 if (relax_info == NULL)
6136 if (relax_info->fix_list == NULL)
6139 if (relax_info->fix_array == NULL)
6140 cache_fix_array (sec);
6142 key.src_offset = offset;
6143 key.src_type = type;
6144 rv = bsearch (&key, relax_info->fix_array, relax_info->fix_array_count,
6145 sizeof (reloc_bfd_fix), fix_compare);
6150 /* Section caching. */
6152 typedef struct section_cache_struct section_cache_t;
6154 struct section_cache_struct
6158 bfd_byte *contents; /* Cache of the section contents. */
6159 bfd_size_type content_length;
6161 property_table_entry *ptbl; /* Cache of the section property table. */
6164 Elf_Internal_Rela *relocs; /* Cache of the section relocations. */
6165 unsigned reloc_count;
6170 init_section_cache (section_cache_t *sec_cache)
6172 memset (sec_cache, 0, sizeof (*sec_cache));
6177 free_section_cache (section_cache_t *sec_cache)
6181 release_contents (sec_cache->sec, sec_cache->contents);
6182 release_internal_relocs (sec_cache->sec, sec_cache->relocs);
6183 if (sec_cache->ptbl)
6184 free (sec_cache->ptbl);
6190 section_cache_section (section_cache_t *sec_cache,
6192 struct bfd_link_info *link_info)
6195 property_table_entry *prop_table = NULL;
6197 bfd_byte *contents = NULL;
6198 Elf_Internal_Rela *internal_relocs = NULL;
6199 bfd_size_type sec_size;
6203 if (sec == sec_cache->sec)
6207 sec_size = bfd_get_section_limit (abfd, sec);
6209 /* Get the contents. */
6210 contents = retrieve_contents (abfd, sec, link_info->keep_memory);
6211 if (contents == NULL && sec_size != 0)
6214 /* Get the relocations. */
6215 internal_relocs = retrieve_internal_relocs (abfd, sec,
6216 link_info->keep_memory);
6218 /* Get the entry table. */
6219 ptblsize = xtensa_read_table_entries (abfd, sec, &prop_table,
6220 XTENSA_PROP_SEC_NAME, FALSE);
6224 /* Fill in the new section cache. */
6225 free_section_cache (sec_cache);
6226 init_section_cache (sec_cache);
6228 sec_cache->sec = sec;
6229 sec_cache->contents = contents;
6230 sec_cache->content_length = sec_size;
6231 sec_cache->relocs = internal_relocs;
6232 sec_cache->reloc_count = sec->reloc_count;
6233 sec_cache->pte_count = ptblsize;
6234 sec_cache->ptbl = prop_table;
6239 release_contents (sec, contents);
6240 release_internal_relocs (sec, internal_relocs);
6247 /* Extended basic blocks. */
6249 /* An ebb_struct represents an Extended Basic Block. Within this
6250 range, we guarantee that all instructions are decodable, the
6251 property table entries are contiguous, and no property table
6252 specifies a segment that cannot have instructions moved. This
6253 structure contains caches of the contents, property table and
6254 relocations for the specified section for easy use. The range is
6255 specified by ranges of indices for the byte offset, property table
6256 offsets and relocation offsets. These must be consistent. */
6258 typedef struct ebb_struct ebb_t;
6264 bfd_byte *contents; /* Cache of the section contents. */
6265 bfd_size_type content_length;
6267 property_table_entry *ptbl; /* Cache of the section property table. */
6270 Elf_Internal_Rela *relocs; /* Cache of the section relocations. */
6271 unsigned reloc_count;
6273 bfd_vma start_offset; /* Offset in section. */
6274 unsigned start_ptbl_idx; /* Offset in the property table. */
6275 unsigned start_reloc_idx; /* Offset in the relocations. */
6278 unsigned end_ptbl_idx;
6279 unsigned end_reloc_idx;
6281 bfd_boolean ends_section; /* Is this the last ebb in a section? */
6283 /* The unreachable property table at the end of this set of blocks;
6284 NULL if the end is not an unreachable block. */
6285 property_table_entry *ends_unreachable;
6289 enum ebb_target_enum
6292 EBB_DESIRE_TGT_ALIGN,
6293 EBB_REQUIRE_TGT_ALIGN,
6294 EBB_REQUIRE_LOOP_ALIGN,
6299 /* proposed_action_struct is similar to the text_action_struct except
6300 that is represents a potential transformation, not one that will
6301 occur. We build a list of these for an extended basic block
6302 and use them to compute the actual actions desired. We must be
6303 careful that the entire set of actual actions we perform do not
6304 break any relocations that would fit if the actions were not
6307 typedef struct proposed_action_struct proposed_action;
6309 struct proposed_action_struct
6311 enum ebb_target_enum align_type; /* for the target alignment */
6312 bfd_vma alignment_pow;
6313 text_action_t action;
6316 bfd_boolean do_action; /* If false, then we will not perform the action. */
6320 /* The ebb_constraint_struct keeps a set of proposed actions for an
6321 extended basic block. */
6323 typedef struct ebb_constraint_struct ebb_constraint;
6325 struct ebb_constraint_struct
6328 bfd_boolean start_movable;
6330 /* Bytes of extra space at the beginning if movable. */
6331 int start_extra_space;
6333 enum ebb_target_enum start_align;
6335 bfd_boolean end_movable;
6337 /* Bytes of extra space at the end if movable. */
6338 int end_extra_space;
6340 unsigned action_count;
6341 unsigned action_allocated;
6343 /* Array of proposed actions. */
6344 proposed_action *actions;
6346 /* Action alignments -- one for each proposed action. */
6347 enum ebb_target_enum *action_aligns;
6352 init_ebb_constraint (ebb_constraint *c)
6354 memset (c, 0, sizeof (ebb_constraint));
6359 free_ebb_constraint (ebb_constraint *c)
6367 init_ebb (ebb_t *ebb,
6370 bfd_size_type content_length,
6371 property_table_entry *prop_table,
6373 Elf_Internal_Rela *internal_relocs,
6374 unsigned reloc_count)
6376 memset (ebb, 0, sizeof (ebb_t));
6378 ebb->contents = contents;
6379 ebb->content_length = content_length;
6380 ebb->ptbl = prop_table;
6381 ebb->pte_count = ptblsize;
6382 ebb->relocs = internal_relocs;
6383 ebb->reloc_count = reloc_count;
6384 ebb->start_offset = 0;
6385 ebb->end_offset = ebb->content_length - 1;
6386 ebb->start_ptbl_idx = 0;
6387 ebb->end_ptbl_idx = ptblsize;
6388 ebb->start_reloc_idx = 0;
6389 ebb->end_reloc_idx = reloc_count;
6393 /* Extend the ebb to all decodable contiguous sections. The algorithm
6394 for building a basic block around an instruction is to push it
6395 forward until we hit the end of a section, an unreachable block or
6396 a block that cannot be transformed. Then we push it backwards
6397 searching for similar conditions. */
6399 static bfd_boolean extend_ebb_bounds_forward (ebb_t *);
6400 static bfd_boolean extend_ebb_bounds_backward (ebb_t *);
6401 static bfd_size_type insn_block_decodable_len
6402 (bfd_byte *, bfd_size_type, bfd_vma, bfd_size_type);
6405 extend_ebb_bounds (ebb_t *ebb)
6407 if (!extend_ebb_bounds_forward (ebb))
6409 if (!extend_ebb_bounds_backward (ebb))
6416 extend_ebb_bounds_forward (ebb_t *ebb)
6418 property_table_entry *the_entry, *new_entry;
6420 the_entry = &ebb->ptbl[ebb->end_ptbl_idx];
6422 /* Stop when (1) we cannot decode an instruction, (2) we are at
6423 the end of the property tables, (3) we hit a non-contiguous property
6424 table entry, (4) we hit a NO_TRANSFORM region. */
6429 bfd_size_type insn_block_len;
6431 entry_end = the_entry->address - ebb->sec->vma + the_entry->size;
6433 insn_block_decodable_len (ebb->contents, ebb->content_length,
6435 entry_end - ebb->end_offset);
6436 if (insn_block_len != (entry_end - ebb->end_offset))
6439 /* xgettext:c-format */
6440 (_("%pB(%pA+%#" PRIx64 "): could not decode instruction; "
6441 "possible configuration mismatch"),
6442 ebb->sec->owner, ebb->sec,
6443 (uint64_t) (ebb->end_offset + insn_block_len));
6446 ebb->end_offset += insn_block_len;
6448 if (ebb->end_offset == ebb->sec->size)
6449 ebb->ends_section = TRUE;
6451 /* Update the reloc counter. */
6452 while (ebb->end_reloc_idx + 1 < ebb->reloc_count
6453 && (ebb->relocs[ebb->end_reloc_idx + 1].r_offset
6456 ebb->end_reloc_idx++;
6459 if (ebb->end_ptbl_idx + 1 == ebb->pte_count)
6462 new_entry = &ebb->ptbl[ebb->end_ptbl_idx + 1];
6463 if (((new_entry->flags & XTENSA_PROP_INSN) == 0)
6464 || ((new_entry->flags & XTENSA_PROP_NO_TRANSFORM) != 0)
6465 || ((the_entry->flags & XTENSA_PROP_ALIGN) != 0))
6468 if (the_entry->address + the_entry->size != new_entry->address)
6471 the_entry = new_entry;
6472 ebb->end_ptbl_idx++;
6475 /* Quick check for an unreachable or end of file just at the end. */
6476 if (ebb->end_ptbl_idx + 1 == ebb->pte_count)
6478 if (ebb->end_offset == ebb->content_length)
6479 ebb->ends_section = TRUE;
6483 new_entry = &ebb->ptbl[ebb->end_ptbl_idx + 1];
6484 if ((new_entry->flags & XTENSA_PROP_UNREACHABLE) != 0
6485 && the_entry->address + the_entry->size == new_entry->address)
6486 ebb->ends_unreachable = new_entry;
6489 /* Any other ending requires exact alignment. */
6495 extend_ebb_bounds_backward (ebb_t *ebb)
6497 property_table_entry *the_entry, *new_entry;
6499 the_entry = &ebb->ptbl[ebb->start_ptbl_idx];
6501 /* Stop when (1) we cannot decode the instructions in the current entry.
6502 (2) we are at the beginning of the property tables, (3) we hit a
6503 non-contiguous property table entry, (4) we hit a NO_TRANSFORM region. */
6507 bfd_vma block_begin;
6508 bfd_size_type insn_block_len;
6510 block_begin = the_entry->address - ebb->sec->vma;
6512 insn_block_decodable_len (ebb->contents, ebb->content_length,
6514 ebb->start_offset - block_begin);
6515 if (insn_block_len != ebb->start_offset - block_begin)
6518 /* xgettext:c-format */
6519 (_("%pB(%pA+%#" PRIx64 "): could not decode instruction; "
6520 "possible configuration mismatch"),
6521 ebb->sec->owner, ebb->sec,
6522 (uint64_t) (ebb->end_offset + insn_block_len));
6525 ebb->start_offset -= insn_block_len;
6527 /* Update the reloc counter. */
6528 while (ebb->start_reloc_idx > 0
6529 && (ebb->relocs[ebb->start_reloc_idx - 1].r_offset
6530 >= ebb->start_offset))
6532 ebb->start_reloc_idx--;
6535 if (ebb->start_ptbl_idx == 0)
6538 new_entry = &ebb->ptbl[ebb->start_ptbl_idx - 1];
6539 if ((new_entry->flags & XTENSA_PROP_INSN) == 0
6540 || ((new_entry->flags & XTENSA_PROP_NO_TRANSFORM) != 0)
6541 || ((new_entry->flags & XTENSA_PROP_ALIGN) != 0))
6543 if (new_entry->address + new_entry->size != the_entry->address)
6546 the_entry = new_entry;
6547 ebb->start_ptbl_idx--;
6553 static bfd_size_type
6554 insn_block_decodable_len (bfd_byte *contents,
6555 bfd_size_type content_len,
6556 bfd_vma block_offset,
6557 bfd_size_type block_len)
6559 bfd_vma offset = block_offset;
6561 while (offset < block_offset + block_len)
6563 bfd_size_type insn_len = 0;
6565 insn_len = insn_decode_len (contents, content_len, offset);
6567 return (offset - block_offset);
6570 return (offset - block_offset);
6575 ebb_propose_action (ebb_constraint *c,
6576 enum ebb_target_enum align_type,
6577 bfd_vma alignment_pow,
6578 text_action_t action,
6581 bfd_boolean do_action)
6583 proposed_action *act;
6585 if (c->action_allocated <= c->action_count)
6587 unsigned new_allocated, i;
6588 proposed_action *new_actions;
6590 new_allocated = (c->action_count + 2) * 2;
6591 new_actions = (proposed_action *)
6592 bfd_zmalloc (sizeof (proposed_action) * new_allocated);
6594 for (i = 0; i < c->action_count; i++)
6595 new_actions[i] = c->actions[i];
6598 c->actions = new_actions;
6599 c->action_allocated = new_allocated;
6602 act = &c->actions[c->action_count];
6603 act->align_type = align_type;
6604 act->alignment_pow = alignment_pow;
6605 act->action = action;
6606 act->offset = offset;
6607 act->removed_bytes = removed_bytes;
6608 act->do_action = do_action;
6614 /* Access to internal relocations, section contents and symbols. */
6616 /* During relaxation, we need to modify relocations, section contents,
6617 and symbol definitions, and we need to keep the original values from
6618 being reloaded from the input files, i.e., we need to "pin" the
6619 modified values in memory. We also want to continue to observe the
6620 setting of the "keep-memory" flag. The following functions wrap the
6621 standard BFD functions to take care of this for us. */
6623 static Elf_Internal_Rela *
6624 retrieve_internal_relocs (bfd *abfd, asection *sec, bfd_boolean keep_memory)
6626 Elf_Internal_Rela *internal_relocs;
6628 if ((sec->flags & SEC_LINKER_CREATED) != 0)
6631 internal_relocs = elf_section_data (sec)->relocs;
6632 if (internal_relocs == NULL)
6633 internal_relocs = (_bfd_elf_link_read_relocs
6634 (abfd, sec, NULL, NULL, keep_memory));
6635 return internal_relocs;
6640 pin_internal_relocs (asection *sec, Elf_Internal_Rela *internal_relocs)
6642 elf_section_data (sec)->relocs = internal_relocs;
6647 release_internal_relocs (asection *sec, Elf_Internal_Rela *internal_relocs)
6650 && elf_section_data (sec)->relocs != internal_relocs)
6651 free (internal_relocs);
6656 retrieve_contents (bfd *abfd, asection *sec, bfd_boolean keep_memory)
6659 bfd_size_type sec_size;
6661 sec_size = bfd_get_section_limit (abfd, sec);
6662 contents = elf_section_data (sec)->this_hdr.contents;
6664 if (contents == NULL && sec_size != 0)
6666 if (!bfd_malloc_and_get_section (abfd, sec, &contents))
6673 elf_section_data (sec)->this_hdr.contents = contents;
6680 pin_contents (asection *sec, bfd_byte *contents)
6682 elf_section_data (sec)->this_hdr.contents = contents;
6687 release_contents (asection *sec, bfd_byte *contents)
6689 if (contents && elf_section_data (sec)->this_hdr.contents != contents)
6694 static Elf_Internal_Sym *
6695 retrieve_local_syms (bfd *input_bfd)
6697 Elf_Internal_Shdr *symtab_hdr;
6698 Elf_Internal_Sym *isymbuf;
6701 symtab_hdr = &elf_tdata (input_bfd)->symtab_hdr;
6702 locsymcount = symtab_hdr->sh_info;
6704 isymbuf = (Elf_Internal_Sym *) symtab_hdr->contents;
6705 if (isymbuf == NULL && locsymcount != 0)
6706 isymbuf = bfd_elf_get_elf_syms (input_bfd, symtab_hdr, locsymcount, 0,
6709 /* Save the symbols for this input file so they won't be read again. */
6710 if (isymbuf && isymbuf != (Elf_Internal_Sym *) symtab_hdr->contents)
6711 symtab_hdr->contents = (unsigned char *) isymbuf;
6717 /* Code for link-time relaxation. */
6719 /* Initialization for relaxation: */
6720 static bfd_boolean analyze_relocations (struct bfd_link_info *);
6721 static bfd_boolean find_relaxable_sections
6722 (bfd *, asection *, struct bfd_link_info *, bfd_boolean *);
6723 static bfd_boolean collect_source_relocs
6724 (bfd *, asection *, struct bfd_link_info *);
6725 static bfd_boolean is_resolvable_asm_expansion
6726 (bfd *, asection *, bfd_byte *, Elf_Internal_Rela *, struct bfd_link_info *,
6728 static Elf_Internal_Rela *find_associated_l32r_irel
6729 (bfd *, asection *, bfd_byte *, Elf_Internal_Rela *, Elf_Internal_Rela *);
6730 static bfd_boolean compute_text_actions
6731 (bfd *, asection *, struct bfd_link_info *);
6732 static bfd_boolean compute_ebb_proposed_actions (ebb_constraint *);
6733 static bfd_boolean compute_ebb_actions (ebb_constraint *);
6734 typedef struct reloc_range_list_struct reloc_range_list;
6735 static bfd_boolean check_section_ebb_pcrels_fit
6736 (bfd *, asection *, bfd_byte *, Elf_Internal_Rela *,
6737 reloc_range_list *, const ebb_constraint *,
6738 const xtensa_opcode *);
6739 static bfd_boolean check_section_ebb_reduces (const ebb_constraint *);
6740 static void text_action_add_proposed
6741 (text_action_list *, const ebb_constraint *, asection *);
6744 static bfd_boolean compute_removed_literals
6745 (bfd *, asection *, struct bfd_link_info *, value_map_hash_table *);
6746 static Elf_Internal_Rela *get_irel_at_offset
6747 (asection *, Elf_Internal_Rela *, bfd_vma);
6748 static bfd_boolean is_removable_literal
6749 (const source_reloc *, int, const source_reloc *, int, asection *,
6750 property_table_entry *, int);
6751 static bfd_boolean remove_dead_literal
6752 (bfd *, asection *, struct bfd_link_info *, Elf_Internal_Rela *,
6753 Elf_Internal_Rela *, source_reloc *, property_table_entry *, int);
6754 static bfd_boolean identify_literal_placement
6755 (bfd *, asection *, bfd_byte *, struct bfd_link_info *,
6756 value_map_hash_table *, bfd_boolean *, Elf_Internal_Rela *, int,
6757 source_reloc *, property_table_entry *, int, section_cache_t *,
6759 static bfd_boolean relocations_reach (source_reloc *, int, const r_reloc *);
6760 static bfd_boolean coalesce_shared_literal
6761 (asection *, source_reloc *, property_table_entry *, int, value_map *);
6762 static bfd_boolean move_shared_literal
6763 (asection *, struct bfd_link_info *, source_reloc *, property_table_entry *,
6764 int, const r_reloc *, const literal_value *, section_cache_t *);
6767 static bfd_boolean relax_section (bfd *, asection *, struct bfd_link_info *);
6768 static bfd_boolean translate_section_fixes (asection *);
6769 static bfd_boolean translate_reloc_bfd_fix (reloc_bfd_fix *);
6770 static asection *translate_reloc (const r_reloc *, r_reloc *, asection *);
6771 static void shrink_dynamic_reloc_sections
6772 (struct bfd_link_info *, bfd *, asection *, Elf_Internal_Rela *);
6773 static bfd_boolean move_literal
6774 (bfd *, struct bfd_link_info *, asection *, bfd_vma, bfd_byte *,
6775 xtensa_relax_info *, Elf_Internal_Rela **, const literal_value *);
6776 static bfd_boolean relax_property_section
6777 (bfd *, asection *, struct bfd_link_info *);
6780 static bfd_boolean relax_section_symbols (bfd *, asection *);
6784 elf_xtensa_relax_section (bfd *abfd,
6786 struct bfd_link_info *link_info,
6789 static value_map_hash_table *values = NULL;
6790 static bfd_boolean relocations_analyzed = FALSE;
6791 xtensa_relax_info *relax_info;
6793 if (!relocations_analyzed)
6795 /* Do some overall initialization for relaxation. */
6796 values = value_map_hash_table_init ();
6799 relaxing_section = TRUE;
6800 if (!analyze_relocations (link_info))
6802 relocations_analyzed = TRUE;
6806 /* Don't mess with linker-created sections. */
6807 if ((sec->flags & SEC_LINKER_CREATED) != 0)
6810 relax_info = get_xtensa_relax_info (sec);
6811 BFD_ASSERT (relax_info != NULL);
6813 switch (relax_info->visited)
6816 /* Note: It would be nice to fold this pass into
6817 analyze_relocations, but it is important for this step that the
6818 sections be examined in link order. */
6819 if (!compute_removed_literals (abfd, sec, link_info, values))
6826 value_map_hash_table_delete (values);
6828 if (!relax_section (abfd, sec, link_info))
6834 if (!relax_section_symbols (abfd, sec))
6839 relax_info->visited++;
6844 /* Initialization for relaxation. */
6846 /* This function is called once at the start of relaxation. It scans
6847 all the input sections and marks the ones that are relaxable (i.e.,
6848 literal sections with L32R relocations against them), and then
6849 collects source_reloc information for all the relocations against
6850 those relaxable sections. During this process, it also detects
6851 longcalls, i.e., calls relaxed by the assembler into indirect
6852 calls, that can be optimized back into direct calls. Within each
6853 extended basic block (ebb) containing an optimized longcall, it
6854 computes a set of "text actions" that can be performed to remove
6855 the L32R associated with the longcall while optionally preserving
6856 branch target alignments. */
6859 analyze_relocations (struct bfd_link_info *link_info)
6863 bfd_boolean is_relaxable = FALSE;
6865 /* Initialize the per-section relaxation info. */
6866 for (abfd = link_info->input_bfds; abfd != NULL; abfd = abfd->link.next)
6867 for (sec = abfd->sections; sec != NULL; sec = sec->next)
6869 init_xtensa_relax_info (sec);
6872 /* Mark relaxable sections (and count relocations against each one). */
6873 for (abfd = link_info->input_bfds; abfd != NULL; abfd = abfd->link.next)
6874 for (sec = abfd->sections; sec != NULL; sec = sec->next)
6876 if (!find_relaxable_sections (abfd, sec, link_info, &is_relaxable))
6880 /* Bail out if there are no relaxable sections. */
6884 /* Allocate space for source_relocs. */
6885 for (abfd = link_info->input_bfds; abfd != NULL; abfd = abfd->link.next)
6886 for (sec = abfd->sections; sec != NULL; sec = sec->next)
6888 xtensa_relax_info *relax_info;
6890 relax_info = get_xtensa_relax_info (sec);
6891 if (relax_info->is_relaxable_literal_section
6892 || relax_info->is_relaxable_asm_section)
6894 relax_info->src_relocs = (source_reloc *)
6895 bfd_malloc (relax_info->src_count * sizeof (source_reloc));
6898 relax_info->src_count = 0;
6901 /* Collect info on relocations against each relaxable section. */
6902 for (abfd = link_info->input_bfds; abfd != NULL; abfd = abfd->link.next)
6903 for (sec = abfd->sections; sec != NULL; sec = sec->next)
6905 if (!collect_source_relocs (abfd, sec, link_info))
6909 /* Compute the text actions. */
6910 for (abfd = link_info->input_bfds; abfd != NULL; abfd = abfd->link.next)
6911 for (sec = abfd->sections; sec != NULL; sec = sec->next)
6913 if (!compute_text_actions (abfd, sec, link_info))
6921 /* Find all the sections that might be relaxed. The motivation for
6922 this pass is that collect_source_relocs() needs to record _all_ the
6923 relocations that target each relaxable section. That is expensive
6924 and unnecessary unless the target section is actually going to be
6925 relaxed. This pass identifies all such sections by checking if
6926 they have L32Rs pointing to them. In the process, the total number
6927 of relocations targeting each section is also counted so that we
6928 know how much space to allocate for source_relocs against each
6929 relaxable literal section. */
6932 find_relaxable_sections (bfd *abfd,
6934 struct bfd_link_info *link_info,
6935 bfd_boolean *is_relaxable_p)
6937 Elf_Internal_Rela *internal_relocs;
6939 bfd_boolean ok = TRUE;
6941 xtensa_relax_info *source_relax_info;
6942 bfd_boolean is_l32r_reloc;
6944 internal_relocs = retrieve_internal_relocs (abfd, sec,
6945 link_info->keep_memory);
6946 if (internal_relocs == NULL)
6949 contents = retrieve_contents (abfd, sec, link_info->keep_memory);
6950 if (contents == NULL && sec->size != 0)
6956 source_relax_info = get_xtensa_relax_info (sec);
6957 for (i = 0; i < sec->reloc_count; i++)
6959 Elf_Internal_Rela *irel = &internal_relocs[i];
6961 asection *target_sec;
6962 xtensa_relax_info *target_relax_info;
6964 /* If this section has not already been marked as "relaxable", and
6965 if it contains any ASM_EXPAND relocations (marking expanded
6966 longcalls) that can be optimized into direct calls, then mark
6967 the section as "relaxable". */
6968 if (source_relax_info
6969 && !source_relax_info->is_relaxable_asm_section
6970 && ELF32_R_TYPE (irel->r_info) == R_XTENSA_ASM_EXPAND)
6972 bfd_boolean is_reachable = FALSE;
6973 if (is_resolvable_asm_expansion (abfd, sec, contents, irel,
6974 link_info, &is_reachable)
6977 source_relax_info->is_relaxable_asm_section = TRUE;
6978 *is_relaxable_p = TRUE;
6982 r_reloc_init (&r_rel, abfd, irel, contents,
6983 bfd_get_section_limit (abfd, sec));
6985 target_sec = r_reloc_get_section (&r_rel);
6986 target_relax_info = get_xtensa_relax_info (target_sec);
6987 if (!target_relax_info)
6990 /* Count PC-relative operand relocations against the target section.
6991 Note: The conditions tested here must match the conditions under
6992 which init_source_reloc is called in collect_source_relocs(). */
6993 is_l32r_reloc = FALSE;
6994 if (is_operand_relocation (ELF32_R_TYPE (irel->r_info)))
6996 xtensa_opcode opcode =
6997 get_relocation_opcode (abfd, sec, contents, irel);
6998 if (opcode != XTENSA_UNDEFINED)
7000 is_l32r_reloc = (opcode == get_l32r_opcode ());
7001 if (!is_alt_relocation (ELF32_R_TYPE (irel->r_info))
7003 target_relax_info->src_count++;
7007 if (is_l32r_reloc && r_reloc_is_defined (&r_rel))
7009 /* Mark the target section as relaxable. */
7010 target_relax_info->is_relaxable_literal_section = TRUE;
7011 *is_relaxable_p = TRUE;
7016 release_contents (sec, contents);
7017 release_internal_relocs (sec, internal_relocs);
7022 /* Record _all_ the relocations that point to relaxable sections, and
7023 get rid of ASM_EXPAND relocs by either converting them to
7024 ASM_SIMPLIFY or by removing them. */
7027 collect_source_relocs (bfd *abfd,
7029 struct bfd_link_info *link_info)
7031 Elf_Internal_Rela *internal_relocs;
7033 bfd_boolean ok = TRUE;
7035 bfd_size_type sec_size;
7037 internal_relocs = retrieve_internal_relocs (abfd, sec,
7038 link_info->keep_memory);
7039 if (internal_relocs == NULL)
7042 sec_size = bfd_get_section_limit (abfd, sec);
7043 contents = retrieve_contents (abfd, sec, link_info->keep_memory);
7044 if (contents == NULL && sec_size != 0)
7050 /* Record relocations against relaxable literal sections. */
7051 for (i = 0; i < sec->reloc_count; i++)
7053 Elf_Internal_Rela *irel = &internal_relocs[i];
7055 asection *target_sec;
7056 xtensa_relax_info *target_relax_info;
7058 r_reloc_init (&r_rel, abfd, irel, contents, sec_size);
7060 target_sec = r_reloc_get_section (&r_rel);
7061 target_relax_info = get_xtensa_relax_info (target_sec);
7063 if (target_relax_info
7064 && (target_relax_info->is_relaxable_literal_section
7065 || target_relax_info->is_relaxable_asm_section))
7067 xtensa_opcode opcode = XTENSA_UNDEFINED;
7069 bfd_boolean is_abs_literal = FALSE;
7071 if (is_alt_relocation (ELF32_R_TYPE (irel->r_info)))
7073 /* None of the current alternate relocs are PC-relative,
7074 and only PC-relative relocs matter here. However, we
7075 still need to record the opcode for literal
7077 opcode = get_relocation_opcode (abfd, sec, contents, irel);
7078 if (opcode == get_l32r_opcode ())
7080 is_abs_literal = TRUE;
7084 opcode = XTENSA_UNDEFINED;
7086 else if (is_operand_relocation (ELF32_R_TYPE (irel->r_info)))
7088 opcode = get_relocation_opcode (abfd, sec, contents, irel);
7089 opnd = get_relocation_opnd (opcode, ELF32_R_TYPE (irel->r_info));
7092 if (opcode != XTENSA_UNDEFINED)
7094 int src_next = target_relax_info->src_next++;
7095 source_reloc *s_reloc = &target_relax_info->src_relocs[src_next];
7097 init_source_reloc (s_reloc, sec, &r_rel, opcode, opnd,
7103 /* Now get rid of ASM_EXPAND relocations. At this point, the
7104 src_relocs array for the target literal section may still be
7105 incomplete, but it must at least contain the entries for the L32R
7106 relocations associated with ASM_EXPANDs because they were just
7107 added in the preceding loop over the relocations. */
7109 for (i = 0; i < sec->reloc_count; i++)
7111 Elf_Internal_Rela *irel = &internal_relocs[i];
7112 bfd_boolean is_reachable;
7114 if (!is_resolvable_asm_expansion (abfd, sec, contents, irel, link_info,
7120 Elf_Internal_Rela *l32r_irel;
7122 asection *target_sec;
7123 xtensa_relax_info *target_relax_info;
7125 /* Mark the source_reloc for the L32R so that it will be
7126 removed in compute_removed_literals(), along with the
7127 associated literal. */
7128 l32r_irel = find_associated_l32r_irel (abfd, sec, contents,
7129 irel, internal_relocs);
7130 if (l32r_irel == NULL)
7133 r_reloc_init (&r_rel, abfd, l32r_irel, contents, sec_size);
7135 target_sec = r_reloc_get_section (&r_rel);
7136 target_relax_info = get_xtensa_relax_info (target_sec);
7138 if (target_relax_info
7139 && (target_relax_info->is_relaxable_literal_section
7140 || target_relax_info->is_relaxable_asm_section))
7142 source_reloc *s_reloc;
7144 /* Search the source_relocs for the entry corresponding to
7145 the l32r_irel. Note: The src_relocs array is not yet
7146 sorted, but it wouldn't matter anyway because we're
7147 searching by source offset instead of target offset. */
7148 s_reloc = find_source_reloc (target_relax_info->src_relocs,
7149 target_relax_info->src_next,
7151 BFD_ASSERT (s_reloc);
7152 s_reloc->is_null = TRUE;
7155 /* Convert this reloc to ASM_SIMPLIFY. */
7156 irel->r_info = ELF32_R_INFO (ELF32_R_SYM (irel->r_info),
7157 R_XTENSA_ASM_SIMPLIFY);
7158 l32r_irel->r_info = ELF32_R_INFO (0, R_XTENSA_NONE);
7160 pin_internal_relocs (sec, internal_relocs);
7164 /* It is resolvable but doesn't reach. We resolve now
7165 by eliminating the relocation -- the call will remain
7166 expanded into L32R/CALLX. */
7167 irel->r_info = ELF32_R_INFO (0, R_XTENSA_NONE);
7168 pin_internal_relocs (sec, internal_relocs);
7173 release_contents (sec, contents);
7174 release_internal_relocs (sec, internal_relocs);
7179 /* Return TRUE if the asm expansion can be resolved. Generally it can
7180 be resolved on a final link or when a partial link locates it in the
7181 same section as the target. Set "is_reachable" flag if the target of
7182 the call is within the range of a direct call, given the current VMA
7183 for this section and the target section. */
7186 is_resolvable_asm_expansion (bfd *abfd,
7189 Elf_Internal_Rela *irel,
7190 struct bfd_link_info *link_info,
7191 bfd_boolean *is_reachable_p)
7193 asection *target_sec;
7194 bfd_vma target_offset;
7196 xtensa_opcode opcode, direct_call_opcode;
7197 bfd_vma self_address;
7198 bfd_vma dest_address;
7199 bfd_boolean uses_l32r;
7200 bfd_size_type sec_size;
7202 *is_reachable_p = FALSE;
7204 if (contents == NULL)
7207 if (ELF32_R_TYPE (irel->r_info) != R_XTENSA_ASM_EXPAND)
7210 sec_size = bfd_get_section_limit (abfd, sec);
7211 opcode = get_expanded_call_opcode (contents + irel->r_offset,
7212 sec_size - irel->r_offset, &uses_l32r);
7213 /* Optimization of longcalls that use CONST16 is not yet implemented. */
7217 direct_call_opcode = swap_callx_for_call_opcode (opcode);
7218 if (direct_call_opcode == XTENSA_UNDEFINED)
7221 /* Check and see that the target resolves. */
7222 r_reloc_init (&r_rel, abfd, irel, contents, sec_size);
7223 if (!r_reloc_is_defined (&r_rel))
7226 target_sec = r_reloc_get_section (&r_rel);
7227 target_offset = r_rel.target_offset;
7229 /* If the target is in a shared library, then it doesn't reach. This
7230 isn't supposed to come up because the compiler should never generate
7231 non-PIC calls on systems that use shared libraries, but the linker
7232 shouldn't crash regardless. */
7233 if (!target_sec->output_section)
7236 /* For relocatable sections, we can only simplify when the output
7237 section of the target is the same as the output section of the
7239 if (bfd_link_relocatable (link_info)
7240 && (target_sec->output_section != sec->output_section
7241 || is_reloc_sym_weak (abfd, irel)))
7244 if (target_sec->output_section != sec->output_section)
7246 /* If the two sections are sufficiently far away that relaxation
7247 might take the call out of range, we can't simplify. For
7248 example, a positive displacement call into another memory
7249 could get moved to a lower address due to literal removal,
7250 but the destination won't move, and so the displacment might
7253 If the displacement is negative, assume the destination could
7254 move as far back as the start of the output section. The
7255 self_address will be at least as far into the output section
7256 as it is prior to relaxation.
7258 If the displacement is postive, assume the destination will be in
7259 it's pre-relaxed location (because relaxation only makes sections
7260 smaller). The self_address could go all the way to the beginning
7261 of the output section. */
7263 dest_address = target_sec->output_section->vma;
7264 self_address = sec->output_section->vma;
7266 if (sec->output_section->vma > target_sec->output_section->vma)
7267 self_address += sec->output_offset + irel->r_offset + 3;
7269 dest_address += bfd_get_section_limit (abfd, target_sec->output_section);
7270 /* Call targets should be four-byte aligned. */
7271 dest_address = (dest_address + 3) & ~3;
7276 self_address = (sec->output_section->vma
7277 + sec->output_offset + irel->r_offset + 3);
7278 dest_address = (target_sec->output_section->vma
7279 + target_sec->output_offset + target_offset);
7282 *is_reachable_p = pcrel_reloc_fits (direct_call_opcode, 0,
7283 self_address, dest_address);
7285 if ((self_address >> CALL_SEGMENT_BITS) !=
7286 (dest_address >> CALL_SEGMENT_BITS))
7293 static Elf_Internal_Rela *
7294 find_associated_l32r_irel (bfd *abfd,
7297 Elf_Internal_Rela *other_irel,
7298 Elf_Internal_Rela *internal_relocs)
7302 for (i = 0; i < sec->reloc_count; i++)
7304 Elf_Internal_Rela *irel = &internal_relocs[i];
7306 if (irel == other_irel)
7308 if (irel->r_offset != other_irel->r_offset)
7310 if (is_l32r_relocation (abfd, sec, contents, irel))
7318 static xtensa_opcode *
7319 build_reloc_opcodes (bfd *abfd,
7322 Elf_Internal_Rela *internal_relocs)
7325 xtensa_opcode *reloc_opcodes =
7326 (xtensa_opcode *) bfd_malloc (sizeof (xtensa_opcode) * sec->reloc_count);
7327 for (i = 0; i < sec->reloc_count; i++)
7329 Elf_Internal_Rela *irel = &internal_relocs[i];
7330 reloc_opcodes[i] = get_relocation_opcode (abfd, sec, contents, irel);
7332 return reloc_opcodes;
7335 struct reloc_range_struct
7338 bfd_boolean add; /* TRUE if start of a range, FALSE otherwise. */
7339 /* Original irel index in the array of relocations for a section. */
7340 unsigned irel_index;
7342 typedef struct reloc_range_struct reloc_range;
7344 typedef struct reloc_range_list_entry_struct reloc_range_list_entry;
7345 struct reloc_range_list_entry_struct
7347 reloc_range_list_entry *next;
7348 reloc_range_list_entry *prev;
7349 Elf_Internal_Rela *irel;
7350 xtensa_opcode opcode;
7354 struct reloc_range_list_struct
7356 /* The rest of the structure is only meaningful when ok is TRUE. */
7359 unsigned n_range; /* Number of range markers. */
7360 reloc_range *range; /* Sorted range markers. */
7362 unsigned first; /* Index of a first range element in the list. */
7363 unsigned last; /* One past index of a last range element in the list. */
7365 unsigned n_list; /* Number of list elements. */
7366 reloc_range_list_entry *reloc; /* */
7367 reloc_range_list_entry list_root;
7371 reloc_range_compare (const void *a, const void *b)
7373 const reloc_range *ra = a;
7374 const reloc_range *rb = b;
7376 if (ra->addr != rb->addr)
7377 return ra->addr < rb->addr ? -1 : 1;
7378 if (ra->add != rb->add)
7379 return ra->add ? -1 : 1;
7384 build_reloc_ranges (bfd *abfd, asection *sec,
7386 Elf_Internal_Rela *internal_relocs,
7387 xtensa_opcode *reloc_opcodes,
7388 reloc_range_list *list)
7393 reloc_range *ranges = NULL;
7394 reloc_range_list_entry *reloc =
7395 bfd_malloc (sec->reloc_count * sizeof (*reloc));
7397 memset (list, 0, sizeof (*list));
7400 for (i = 0; i < sec->reloc_count; i++)
7402 Elf_Internal_Rela *irel = &internal_relocs[i];
7403 int r_type = ELF32_R_TYPE (irel->r_info);
7404 reloc_howto_type *howto = &elf_howto_table[r_type];
7407 if (r_type == R_XTENSA_ASM_SIMPLIFY
7408 || r_type == R_XTENSA_32_PCREL
7409 || !howto->pc_relative)
7412 r_reloc_init (&r_rel, abfd, irel, contents,
7413 bfd_get_section_limit (abfd, sec));
7415 if (r_reloc_get_section (&r_rel) != sec)
7420 max_n = (max_n + 2) * 2;
7421 ranges = bfd_realloc (ranges, max_n * sizeof (*ranges));
7424 ranges[n].addr = irel->r_offset;
7425 ranges[n + 1].addr = r_rel.target_offset;
7427 ranges[n].add = ranges[n].addr < ranges[n + 1].addr;
7428 ranges[n + 1].add = !ranges[n].add;
7430 ranges[n].irel_index = i;
7431 ranges[n + 1].irel_index = i;
7435 reloc[i].irel = irel;
7437 /* Every relocation won't possibly be checked in the optimized version of
7438 check_section_ebb_pcrels_fit, so this needs to be done here. */
7439 if (is_alt_relocation (ELF32_R_TYPE (irel->r_info)))
7441 /* None of the current alternate relocs are PC-relative,
7442 and only PC-relative relocs matter here. */
7446 xtensa_opcode opcode;
7450 opcode = reloc_opcodes[i];
7452 opcode = get_relocation_opcode (abfd, sec, contents, irel);
7454 if (opcode == XTENSA_UNDEFINED)
7460 opnum = get_relocation_opnd (opcode, ELF32_R_TYPE (irel->r_info));
7461 if (opnum == XTENSA_UNDEFINED)
7467 /* Record relocation opcode and opnum as we've calculated them
7468 anyway and they won't change. */
7469 reloc[i].opcode = opcode;
7470 reloc[i].opnum = opnum;
7476 ranges = bfd_realloc (ranges, n * sizeof (*ranges));
7477 qsort (ranges, n, sizeof (*ranges), reloc_range_compare);
7480 list->range = ranges;
7481 list->reloc = reloc;
7482 list->list_root.prev = &list->list_root;
7483 list->list_root.next = &list->list_root;
7492 static void reloc_range_list_append (reloc_range_list *list,
7493 unsigned irel_index)
7495 reloc_range_list_entry *entry = list->reloc + irel_index;
7497 entry->prev = list->list_root.prev;
7498 entry->next = &list->list_root;
7499 entry->prev->next = entry;
7500 entry->next->prev = entry;
7504 static void reloc_range_list_remove (reloc_range_list *list,
7505 unsigned irel_index)
7507 reloc_range_list_entry *entry = list->reloc + irel_index;
7509 entry->next->prev = entry->prev;
7510 entry->prev->next = entry->next;
7514 /* Update relocation list object so that it lists all relocations that cross
7515 [first; last] range. Range bounds should not decrease with successive
7517 static void reloc_range_list_update_range (reloc_range_list *list,
7518 bfd_vma first, bfd_vma last)
7520 /* This should not happen: EBBs are iterated from lower addresses to higher.
7521 But even if that happens there's no need to break: just flush current list
7522 and start from scratch. */
7523 if ((list->last > 0 && list->range[list->last - 1].addr > last) ||
7524 (list->first > 0 && list->range[list->first - 1].addr >= first))
7529 list->list_root.next = &list->list_root;
7530 list->list_root.prev = &list->list_root;
7531 fprintf (stderr, "%s: move backwards requested\n", __func__);
7534 for (; list->last < list->n_range &&
7535 list->range[list->last].addr <= last; ++list->last)
7536 if (list->range[list->last].add)
7537 reloc_range_list_append (list, list->range[list->last].irel_index);
7539 for (; list->first < list->n_range &&
7540 list->range[list->first].addr < first; ++list->first)
7541 if (!list->range[list->first].add)
7542 reloc_range_list_remove (list, list->range[list->first].irel_index);
7545 static void free_reloc_range_list (reloc_range_list *list)
7551 /* The compute_text_actions function will build a list of potential
7552 transformation actions for code in the extended basic block of each
7553 longcall that is optimized to a direct call. From this list we
7554 generate a set of actions to actually perform that optimizes for
7555 space and, if not using size_opt, maintains branch target
7558 These actions to be performed are placed on a per-section list.
7559 The actual changes are performed by relax_section() in the second
7563 compute_text_actions (bfd *abfd,
7565 struct bfd_link_info *link_info)
7567 xtensa_opcode *reloc_opcodes = NULL;
7568 xtensa_relax_info *relax_info;
7570 Elf_Internal_Rela *internal_relocs;
7571 bfd_boolean ok = TRUE;
7573 property_table_entry *prop_table = 0;
7575 bfd_size_type sec_size;
7576 reloc_range_list relevant_relocs;
7578 relax_info = get_xtensa_relax_info (sec);
7579 BFD_ASSERT (relax_info);
7580 BFD_ASSERT (relax_info->src_next == relax_info->src_count);
7582 /* Do nothing if the section contains no optimized longcalls. */
7583 if (!relax_info->is_relaxable_asm_section)
7586 internal_relocs = retrieve_internal_relocs (abfd, sec,
7587 link_info->keep_memory);
7589 if (internal_relocs)
7590 qsort (internal_relocs, sec->reloc_count, sizeof (Elf_Internal_Rela),
7591 internal_reloc_compare);
7593 sec_size = bfd_get_section_limit (abfd, sec);
7594 contents = retrieve_contents (abfd, sec, link_info->keep_memory);
7595 if (contents == NULL && sec_size != 0)
7601 ptblsize = xtensa_read_table_entries (abfd, sec, &prop_table,
7602 XTENSA_PROP_SEC_NAME, FALSE);
7609 /* Precompute the opcode for each relocation. */
7610 reloc_opcodes = build_reloc_opcodes (abfd, sec, contents, internal_relocs);
7612 build_reloc_ranges (abfd, sec, contents, internal_relocs, reloc_opcodes,
7615 for (i = 0; i < sec->reloc_count; i++)
7617 Elf_Internal_Rela *irel = &internal_relocs[i];
7619 property_table_entry *the_entry;
7622 ebb_constraint ebb_table;
7623 bfd_size_type simplify_size;
7625 if (irel && ELF32_R_TYPE (irel->r_info) != R_XTENSA_ASM_SIMPLIFY)
7627 r_offset = irel->r_offset;
7629 simplify_size = get_asm_simplify_size (contents, sec_size, r_offset);
7630 if (simplify_size == 0)
7633 /* xgettext:c-format */
7634 (_("%pB(%pA+%#" PRIx64 "): could not decode instruction for "
7635 "XTENSA_ASM_SIMPLIFY relocation; "
7636 "possible configuration mismatch"),
7637 sec->owner, sec, (uint64_t) r_offset);
7641 /* If the instruction table is not around, then don't do this
7643 the_entry = elf_xtensa_find_property_entry (prop_table, ptblsize,
7644 sec->vma + irel->r_offset);
7645 if (the_entry == NULL || XTENSA_NO_NOP_REMOVAL)
7647 text_action_add (&relax_info->action_list,
7648 ta_convert_longcall, sec, r_offset,
7653 /* If the next longcall happens to be at the same address as an
7654 unreachable section of size 0, then skip forward. */
7655 ptbl_idx = the_entry - prop_table;
7656 while ((the_entry->flags & XTENSA_PROP_UNREACHABLE)
7657 && the_entry->size == 0
7658 && ptbl_idx + 1 < ptblsize
7659 && (prop_table[ptbl_idx + 1].address
7660 == prop_table[ptbl_idx].address))
7666 if (the_entry->flags & XTENSA_PROP_NO_TRANSFORM)
7667 /* NO_REORDER is OK */
7670 init_ebb_constraint (&ebb_table);
7671 ebb = &ebb_table.ebb;
7672 init_ebb (ebb, sec, contents, sec_size, prop_table, ptblsize,
7673 internal_relocs, sec->reloc_count);
7674 ebb->start_offset = r_offset + simplify_size;
7675 ebb->end_offset = r_offset + simplify_size;
7676 ebb->start_ptbl_idx = ptbl_idx;
7677 ebb->end_ptbl_idx = ptbl_idx;
7678 ebb->start_reloc_idx = i;
7679 ebb->end_reloc_idx = i;
7681 if (!extend_ebb_bounds (ebb)
7682 || !compute_ebb_proposed_actions (&ebb_table)
7683 || !compute_ebb_actions (&ebb_table)
7684 || !check_section_ebb_pcrels_fit (abfd, sec, contents,
7687 &ebb_table, reloc_opcodes)
7688 || !check_section_ebb_reduces (&ebb_table))
7690 /* If anything goes wrong or we get unlucky and something does
7691 not fit, with our plan because of expansion between
7692 critical branches, just convert to a NOP. */
7694 text_action_add (&relax_info->action_list,
7695 ta_convert_longcall, sec, r_offset, 0);
7696 i = ebb_table.ebb.end_reloc_idx;
7697 free_ebb_constraint (&ebb_table);
7701 text_action_add_proposed (&relax_info->action_list, &ebb_table, sec);
7703 /* Update the index so we do not go looking at the relocations
7704 we have already processed. */
7705 i = ebb_table.ebb.end_reloc_idx;
7706 free_ebb_constraint (&ebb_table);
7709 free_reloc_range_list (&relevant_relocs);
7712 if (action_list_count (&relax_info->action_list))
7713 print_action_list (stderr, &relax_info->action_list);
7717 release_contents (sec, contents);
7718 release_internal_relocs (sec, internal_relocs);
7722 free (reloc_opcodes);
7728 /* Do not widen an instruction if it is preceeded by a
7729 loop opcode. It might cause misalignment. */
7732 prev_instr_is_a_loop (bfd_byte *contents,
7733 bfd_size_type content_length,
7734 bfd_size_type offset)
7736 xtensa_opcode prev_opcode;
7740 prev_opcode = insn_decode_opcode (contents, content_length, offset-3, 0);
7741 return (xtensa_opcode_is_loop (xtensa_default_isa, prev_opcode) == 1);
7745 /* Find all of the possible actions for an extended basic block. */
7748 compute_ebb_proposed_actions (ebb_constraint *ebb_table)
7750 const ebb_t *ebb = &ebb_table->ebb;
7751 unsigned rel_idx = ebb->start_reloc_idx;
7752 property_table_entry *entry, *start_entry, *end_entry;
7754 xtensa_isa isa = xtensa_default_isa;
7756 static xtensa_insnbuf insnbuf = NULL;
7757 static xtensa_insnbuf slotbuf = NULL;
7759 if (insnbuf == NULL)
7761 insnbuf = xtensa_insnbuf_alloc (isa);
7762 slotbuf = xtensa_insnbuf_alloc (isa);
7765 start_entry = &ebb->ptbl[ebb->start_ptbl_idx];
7766 end_entry = &ebb->ptbl[ebb->end_ptbl_idx];
7768 for (entry = start_entry; entry <= end_entry; entry++)
7770 bfd_vma start_offset, end_offset;
7771 bfd_size_type insn_len;
7773 start_offset = entry->address - ebb->sec->vma;
7774 end_offset = entry->address + entry->size - ebb->sec->vma;
7776 if (entry == start_entry)
7777 start_offset = ebb->start_offset;
7778 if (entry == end_entry)
7779 end_offset = ebb->end_offset;
7780 offset = start_offset;
7782 if (offset == entry->address - ebb->sec->vma
7783 && (entry->flags & XTENSA_PROP_INSN_BRANCH_TARGET) != 0)
7785 enum ebb_target_enum align_type = EBB_DESIRE_TGT_ALIGN;
7786 BFD_ASSERT (offset != end_offset);
7787 if (offset == end_offset)
7790 insn_len = insn_decode_len (ebb->contents, ebb->content_length,
7795 if (check_branch_target_aligned_address (offset, insn_len))
7796 align_type = EBB_REQUIRE_TGT_ALIGN;
7798 ebb_propose_action (ebb_table, align_type, 0,
7799 ta_none, offset, 0, TRUE);
7802 while (offset != end_offset)
7804 Elf_Internal_Rela *irel;
7805 xtensa_opcode opcode;
7807 while (rel_idx < ebb->end_reloc_idx
7808 && (ebb->relocs[rel_idx].r_offset < offset
7809 || (ebb->relocs[rel_idx].r_offset == offset
7810 && (ELF32_R_TYPE (ebb->relocs[rel_idx].r_info)
7811 != R_XTENSA_ASM_SIMPLIFY))))
7814 /* Check for longcall. */
7815 irel = &ebb->relocs[rel_idx];
7816 if (irel->r_offset == offset
7817 && ELF32_R_TYPE (irel->r_info) == R_XTENSA_ASM_SIMPLIFY)
7819 bfd_size_type simplify_size;
7821 simplify_size = get_asm_simplify_size (ebb->contents,
7822 ebb->content_length,
7824 if (simplify_size == 0)
7827 ebb_propose_action (ebb_table, EBB_NO_ALIGN, 0,
7828 ta_convert_longcall, offset, 0, TRUE);
7830 offset += simplify_size;
7834 if (offset + MIN_INSN_LENGTH > ebb->content_length)
7836 xtensa_insnbuf_from_chars (isa, insnbuf, &ebb->contents[offset],
7837 ebb->content_length - offset);
7838 fmt = xtensa_format_decode (isa, insnbuf);
7839 if (fmt == XTENSA_UNDEFINED)
7841 insn_len = xtensa_format_length (isa, fmt);
7842 if (insn_len == (bfd_size_type) XTENSA_UNDEFINED)
7845 if (xtensa_format_num_slots (isa, fmt) != 1)
7851 xtensa_format_get_slot (isa, fmt, 0, insnbuf, slotbuf);
7852 opcode = xtensa_opcode_decode (isa, fmt, 0, slotbuf);
7853 if (opcode == XTENSA_UNDEFINED)
7856 if ((entry->flags & XTENSA_PROP_INSN_NO_DENSITY) == 0
7857 && (entry->flags & XTENSA_PROP_NO_TRANSFORM) == 0
7858 && can_narrow_instruction (slotbuf, fmt, opcode) != 0)
7860 /* Add an instruction narrow action. */
7861 ebb_propose_action (ebb_table, EBB_NO_ALIGN, 0,
7862 ta_narrow_insn, offset, 0, FALSE);
7864 else if ((entry->flags & XTENSA_PROP_NO_TRANSFORM) == 0
7865 && can_widen_instruction (slotbuf, fmt, opcode) != 0
7866 && ! prev_instr_is_a_loop (ebb->contents,
7867 ebb->content_length, offset))
7869 /* Add an instruction widen action. */
7870 ebb_propose_action (ebb_table, EBB_NO_ALIGN, 0,
7871 ta_widen_insn, offset, 0, FALSE);
7873 else if (xtensa_opcode_is_loop (xtensa_default_isa, opcode) == 1)
7875 /* Check for branch targets. */
7876 ebb_propose_action (ebb_table, EBB_REQUIRE_LOOP_ALIGN, 0,
7877 ta_none, offset, 0, TRUE);
7884 if (ebb->ends_unreachable)
7886 ebb_propose_action (ebb_table, EBB_NO_ALIGN, 0,
7887 ta_fill, ebb->end_offset, 0, TRUE);
7894 /* xgettext:c-format */
7895 (_("%pB(%pA+%#" PRIx64 "): could not decode instruction; "
7896 "possible configuration mismatch"),
7897 ebb->sec->owner, ebb->sec, (uint64_t) offset);
7902 /* After all of the information has collected about the
7903 transformations possible in an EBB, compute the appropriate actions
7904 here in compute_ebb_actions. We still must check later to make
7905 sure that the actions do not break any relocations. The algorithm
7906 used here is pretty greedy. Basically, it removes as many no-ops
7907 as possible so that the end of the EBB has the same alignment
7908 characteristics as the original. First, it uses narrowing, then
7909 fill space at the end of the EBB, and finally widenings. If that
7910 does not work, it tries again with one fewer no-op removed. The
7911 optimization will only be performed if all of the branch targets
7912 that were aligned before transformation are also aligned after the
7915 When the size_opt flag is set, ignore the branch target alignments,
7916 narrow all wide instructions, and remove all no-ops unless the end
7917 of the EBB prevents it. */
7920 compute_ebb_actions (ebb_constraint *ebb_table)
7924 int removed_bytes = 0;
7925 ebb_t *ebb = &ebb_table->ebb;
7926 unsigned seg_idx_start = 0;
7927 unsigned seg_idx_end = 0;
7929 /* We perform this like the assembler relaxation algorithm: Start by
7930 assuming all instructions are narrow and all no-ops removed; then
7933 /* For each segment of this that has a solid constraint, check to
7934 see if there are any combinations that will keep the constraint.
7936 for (seg_idx_end = 0; seg_idx_end < ebb_table->action_count; seg_idx_end++)
7938 bfd_boolean requires_text_end_align = FALSE;
7939 unsigned longcall_count = 0;
7940 unsigned longcall_convert_count = 0;
7941 unsigned narrowable_count = 0;
7942 unsigned narrowable_convert_count = 0;
7943 unsigned widenable_count = 0;
7944 unsigned widenable_convert_count = 0;
7946 proposed_action *action = NULL;
7947 int align = (1 << ebb_table->ebb.sec->alignment_power);
7949 seg_idx_start = seg_idx_end;
7951 for (i = seg_idx_start; i < ebb_table->action_count; i++)
7953 action = &ebb_table->actions[i];
7954 if (action->action == ta_convert_longcall)
7956 if (action->action == ta_narrow_insn)
7958 if (action->action == ta_widen_insn)
7960 if (action->action == ta_fill)
7962 if (action->align_type == EBB_REQUIRE_LOOP_ALIGN)
7964 if (action->align_type == EBB_REQUIRE_TGT_ALIGN
7965 && !elf32xtensa_size_opt)
7970 if (seg_idx_end == ebb_table->action_count && !ebb->ends_unreachable)
7971 requires_text_end_align = TRUE;
7973 if (elf32xtensa_size_opt && !requires_text_end_align
7974 && action->align_type != EBB_REQUIRE_LOOP_ALIGN
7975 && action->align_type != EBB_REQUIRE_TGT_ALIGN)
7977 longcall_convert_count = longcall_count;
7978 narrowable_convert_count = narrowable_count;
7979 widenable_convert_count = 0;
7983 /* There is a constraint. Convert the max number of longcalls. */
7984 narrowable_convert_count = 0;
7985 longcall_convert_count = 0;
7986 widenable_convert_count = 0;
7988 for (j = 0; j < longcall_count; j++)
7990 int removed = (longcall_count - j) * 3 & (align - 1);
7991 unsigned desire_narrow = (align - removed) & (align - 1);
7992 unsigned desire_widen = removed;
7993 if (desire_narrow <= narrowable_count)
7995 narrowable_convert_count = desire_narrow;
7996 narrowable_convert_count +=
7997 (align * ((narrowable_count - narrowable_convert_count)
7999 longcall_convert_count = (longcall_count - j);
8000 widenable_convert_count = 0;
8003 if (desire_widen <= widenable_count && !elf32xtensa_size_opt)
8005 narrowable_convert_count = 0;
8006 longcall_convert_count = longcall_count - j;
8007 widenable_convert_count = desire_widen;
8013 /* Now the number of conversions are saved. Do them. */
8014 for (i = seg_idx_start; i < seg_idx_end; i++)
8016 action = &ebb_table->actions[i];
8017 switch (action->action)
8019 case ta_convert_longcall:
8020 if (longcall_convert_count != 0)
8022 action->action = ta_remove_longcall;
8023 action->do_action = TRUE;
8024 action->removed_bytes += 3;
8025 longcall_convert_count--;
8028 case ta_narrow_insn:
8029 if (narrowable_convert_count != 0)
8031 action->do_action = TRUE;
8032 action->removed_bytes += 1;
8033 narrowable_convert_count--;
8037 if (widenable_convert_count != 0)
8039 action->do_action = TRUE;
8040 action->removed_bytes -= 1;
8041 widenable_convert_count--;
8050 /* Now we move on to some local opts. Try to remove each of the
8051 remaining longcalls. */
8053 if (ebb_table->ebb.ends_section || ebb_table->ebb.ends_unreachable)
8056 for (i = 0; i < ebb_table->action_count; i++)
8058 int old_removed_bytes = removed_bytes;
8059 proposed_action *action = &ebb_table->actions[i];
8061 if (action->do_action && action->action == ta_convert_longcall)
8063 bfd_boolean bad_alignment = FALSE;
8065 for (j = i + 1; j < ebb_table->action_count; j++)
8067 proposed_action *new_action = &ebb_table->actions[j];
8068 bfd_vma offset = new_action->offset;
8069 if (new_action->align_type == EBB_REQUIRE_TGT_ALIGN)
8071 if (!check_branch_target_aligned
8072 (ebb_table->ebb.contents,
8073 ebb_table->ebb.content_length,
8074 offset, offset - removed_bytes))
8076 bad_alignment = TRUE;
8080 if (new_action->align_type == EBB_REQUIRE_LOOP_ALIGN)
8082 if (!check_loop_aligned (ebb_table->ebb.contents,
8083 ebb_table->ebb.content_length,
8085 offset - removed_bytes))
8087 bad_alignment = TRUE;
8091 if (new_action->action == ta_narrow_insn
8092 && !new_action->do_action
8093 && ebb_table->ebb.sec->alignment_power == 2)
8095 /* Narrow an instruction and we are done. */
8096 new_action->do_action = TRUE;
8097 new_action->removed_bytes += 1;
8098 bad_alignment = FALSE;
8101 if (new_action->action == ta_widen_insn
8102 && new_action->do_action
8103 && ebb_table->ebb.sec->alignment_power == 2)
8105 /* Narrow an instruction and we are done. */
8106 new_action->do_action = FALSE;
8107 new_action->removed_bytes += 1;
8108 bad_alignment = FALSE;
8111 if (new_action->do_action)
8112 removed_bytes += new_action->removed_bytes;
8116 action->removed_bytes += 3;
8117 action->action = ta_remove_longcall;
8118 action->do_action = TRUE;
8121 removed_bytes = old_removed_bytes;
8122 if (action->do_action)
8123 removed_bytes += action->removed_bytes;
8128 for (i = 0; i < ebb_table->action_count; ++i)
8130 proposed_action *action = &ebb_table->actions[i];
8131 if (action->do_action)
8132 removed_bytes += action->removed_bytes;
8135 if ((removed_bytes % (1 << ebb_table->ebb.sec->alignment_power)) != 0
8136 && ebb->ends_unreachable)
8138 proposed_action *action;
8142 BFD_ASSERT (ebb_table->action_count != 0);
8143 action = &ebb_table->actions[ebb_table->action_count - 1];
8144 BFD_ASSERT (action->action == ta_fill);
8145 BFD_ASSERT (ebb->ends_unreachable->flags & XTENSA_PROP_UNREACHABLE);
8147 extra_space = xtensa_compute_fill_extra_space (ebb->ends_unreachable);
8148 br = action->removed_bytes + removed_bytes + extra_space;
8149 br = br & ((1 << ebb->sec->alignment_power ) - 1);
8151 action->removed_bytes = extra_space - br;
8157 /* The xlate_map is a sorted array of address mappings designed to
8158 answer the offset_with_removed_text() query with a binary search instead
8159 of a linear search through the section's action_list. */
8161 typedef struct xlate_map_entry xlate_map_entry_t;
8162 typedef struct xlate_map xlate_map_t;
8164 struct xlate_map_entry
8166 bfd_vma orig_address;
8167 bfd_vma new_address;
8173 unsigned entry_count;
8174 xlate_map_entry_t *entry;
8179 xlate_compare (const void *a_v, const void *b_v)
8181 const xlate_map_entry_t *a = (const xlate_map_entry_t *) a_v;
8182 const xlate_map_entry_t *b = (const xlate_map_entry_t *) b_v;
8183 if (a->orig_address < b->orig_address)
8185 if (a->orig_address > (b->orig_address + b->size - 1))
8192 xlate_offset_with_removed_text (const xlate_map_t *map,
8193 text_action_list *action_list,
8197 xlate_map_entry_t *e;
8198 struct xlate_map_entry se;
8201 return offset_with_removed_text (action_list, offset);
8203 if (map->entry_count == 0)
8206 se.orig_address = offset;
8207 r = bsearch (&se, map->entry, map->entry_count,
8208 sizeof (xlate_map_entry_t), &xlate_compare);
8209 e = (xlate_map_entry_t *) r;
8211 /* There could be a jump past the end of the section,
8212 allow it using the last xlate map entry to translate its address. */
8215 e = map->entry + map->entry_count - 1;
8216 if (xlate_compare (&se, e) <= 0)
8219 BFD_ASSERT (e != NULL);
8222 return e->new_address - e->orig_address + offset;
8225 typedef struct xlate_map_context_struct xlate_map_context;
8226 struct xlate_map_context_struct
8229 xlate_map_entry_t *current_entry;
8234 xlate_map_fn (splay_tree_node node, void *p)
8236 text_action *r = (text_action *)node->value;
8237 xlate_map_context *ctx = p;
8238 unsigned orig_size = 0;
8243 case ta_remove_insn:
8244 case ta_convert_longcall:
8245 case ta_remove_literal:
8246 case ta_add_literal:
8248 case ta_remove_longcall:
8251 case ta_narrow_insn:
8260 ctx->current_entry->size =
8261 r->offset + orig_size - ctx->current_entry->orig_address;
8262 if (ctx->current_entry->size != 0)
8264 ctx->current_entry++;
8265 ctx->map->entry_count++;
8267 ctx->current_entry->orig_address = r->offset + orig_size;
8268 ctx->removed += r->removed_bytes;
8269 ctx->current_entry->new_address = r->offset + orig_size - ctx->removed;
8270 ctx->current_entry->size = 0;
8274 /* Build a binary searchable offset translation map from a section's
8277 static xlate_map_t *
8278 build_xlate_map (asection *sec, xtensa_relax_info *relax_info)
8280 text_action_list *action_list = &relax_info->action_list;
8281 unsigned num_actions = 0;
8282 xlate_map_context ctx;
8284 ctx.map = (xlate_map_t *) bfd_malloc (sizeof (xlate_map_t));
8286 if (ctx.map == NULL)
8289 num_actions = action_list_count (action_list);
8290 ctx.map->entry = (xlate_map_entry_t *)
8291 bfd_malloc (sizeof (xlate_map_entry_t) * (num_actions + 1));
8292 if (ctx.map->entry == NULL)
8297 ctx.map->entry_count = 0;
8300 ctx.current_entry = &ctx.map->entry[0];
8302 ctx.current_entry->orig_address = 0;
8303 ctx.current_entry->new_address = 0;
8304 ctx.current_entry->size = 0;
8306 splay_tree_foreach (action_list->tree, xlate_map_fn, &ctx);
8308 ctx.current_entry->size = (bfd_get_section_limit (sec->owner, sec)
8309 - ctx.current_entry->orig_address);
8310 if (ctx.current_entry->size != 0)
8311 ctx.map->entry_count++;
8317 /* Free an offset translation map. */
8320 free_xlate_map (xlate_map_t *map)
8322 if (map && map->entry)
8329 /* Use check_section_ebb_pcrels_fit to make sure that all of the
8330 relocations in a section will fit if a proposed set of actions
8334 check_section_ebb_pcrels_fit (bfd *abfd,
8337 Elf_Internal_Rela *internal_relocs,
8338 reloc_range_list *relevant_relocs,
8339 const ebb_constraint *constraint,
8340 const xtensa_opcode *reloc_opcodes)
8343 unsigned n = sec->reloc_count;
8344 Elf_Internal_Rela *irel;
8345 xlate_map_t *xmap = NULL;
8346 bfd_boolean ok = TRUE;
8347 xtensa_relax_info *relax_info;
8348 reloc_range_list_entry *entry = NULL;
8350 relax_info = get_xtensa_relax_info (sec);
8352 if (relax_info && sec->reloc_count > 100)
8354 xmap = build_xlate_map (sec, relax_info);
8355 /* NULL indicates out of memory, but the slow version
8356 can still be used. */
8359 if (relevant_relocs && constraint->action_count)
8361 if (!relevant_relocs->ok)
8368 bfd_vma min_offset, max_offset;
8369 min_offset = max_offset = constraint->actions[0].offset;
8371 for (i = 1; i < constraint->action_count; ++i)
8373 proposed_action *action = &constraint->actions[i];
8374 bfd_vma offset = action->offset;
8376 if (offset < min_offset)
8377 min_offset = offset;
8378 if (offset > max_offset)
8379 max_offset = offset;
8381 reloc_range_list_update_range (relevant_relocs, min_offset,
8383 n = relevant_relocs->n_list;
8384 entry = &relevant_relocs->list_root;
8389 relevant_relocs = NULL;
8392 for (i = 0; i < n; i++)
8395 bfd_vma orig_self_offset, orig_target_offset;
8396 bfd_vma self_offset, target_offset;
8398 reloc_howto_type *howto;
8399 int self_removed_bytes, target_removed_bytes;
8401 if (relevant_relocs)
8403 entry = entry->next;
8408 irel = internal_relocs + i;
8410 r_type = ELF32_R_TYPE (irel->r_info);
8412 howto = &elf_howto_table[r_type];
8413 /* We maintain the required invariant: PC-relative relocations
8414 that fit before linking must fit after linking. Thus we only
8415 need to deal with relocations to the same section that are
8417 if (r_type == R_XTENSA_ASM_SIMPLIFY
8418 || r_type == R_XTENSA_32_PCREL
8419 || !howto->pc_relative)
8422 r_reloc_init (&r_rel, abfd, irel, contents,
8423 bfd_get_section_limit (abfd, sec));
8425 if (r_reloc_get_section (&r_rel) != sec)
8428 orig_self_offset = irel->r_offset;
8429 orig_target_offset = r_rel.target_offset;
8431 self_offset = orig_self_offset;
8432 target_offset = orig_target_offset;
8437 xlate_offset_with_removed_text (xmap, &relax_info->action_list,
8440 xlate_offset_with_removed_text (xmap, &relax_info->action_list,
8441 orig_target_offset);
8444 self_removed_bytes = 0;
8445 target_removed_bytes = 0;
8447 for (j = 0; j < constraint->action_count; ++j)
8449 proposed_action *action = &constraint->actions[j];
8450 bfd_vma offset = action->offset;
8451 int removed_bytes = action->removed_bytes;
8452 if (offset < orig_self_offset
8453 || (offset == orig_self_offset && action->action == ta_fill
8454 && action->removed_bytes < 0))
8455 self_removed_bytes += removed_bytes;
8456 if (offset < orig_target_offset
8457 || (offset == orig_target_offset && action->action == ta_fill
8458 && action->removed_bytes < 0))
8459 target_removed_bytes += removed_bytes;
8461 self_offset -= self_removed_bytes;
8462 target_offset -= target_removed_bytes;
8464 /* Try to encode it. Get the operand and check. */
8465 if (is_alt_relocation (ELF32_R_TYPE (irel->r_info)))
8467 /* None of the current alternate relocs are PC-relative,
8468 and only PC-relative relocs matter here. */
8472 xtensa_opcode opcode;
8475 if (relevant_relocs)
8477 opcode = entry->opcode;
8478 opnum = entry->opnum;
8483 opcode = reloc_opcodes[relevant_relocs ?
8484 (unsigned)(entry - relevant_relocs->reloc) : i];
8486 opcode = get_relocation_opcode (abfd, sec, contents, irel);
8487 if (opcode == XTENSA_UNDEFINED)
8493 opnum = get_relocation_opnd (opcode, ELF32_R_TYPE (irel->r_info));
8494 if (opnum == XTENSA_UNDEFINED)
8501 if (!pcrel_reloc_fits (opcode, opnum, self_offset, target_offset))
8510 free_xlate_map (xmap);
8517 check_section_ebb_reduces (const ebb_constraint *constraint)
8522 for (i = 0; i < constraint->action_count; i++)
8524 const proposed_action *action = &constraint->actions[i];
8525 if (action->do_action)
8526 removed += action->removed_bytes;
8536 text_action_add_proposed (text_action_list *l,
8537 const ebb_constraint *ebb_table,
8542 for (i = 0; i < ebb_table->action_count; i++)
8544 proposed_action *action = &ebb_table->actions[i];
8546 if (!action->do_action)
8548 switch (action->action)
8550 case ta_remove_insn:
8551 case ta_remove_longcall:
8552 case ta_convert_longcall:
8553 case ta_narrow_insn:
8556 case ta_remove_literal:
8557 text_action_add (l, action->action, sec, action->offset,
8558 action->removed_bytes);
8571 xtensa_compute_fill_extra_space (property_table_entry *entry)
8573 int fill_extra_space;
8578 if ((entry->flags & XTENSA_PROP_UNREACHABLE) == 0)
8581 fill_extra_space = entry->size;
8582 if ((entry->flags & XTENSA_PROP_ALIGN) != 0)
8584 /* Fill bytes for alignment:
8585 (2**n)-1 - (addr + (2**n)-1) & (2**n -1) */
8586 int pow = GET_XTENSA_PROP_ALIGNMENT (entry->flags);
8587 int nsm = (1 << pow) - 1;
8588 bfd_vma addr = entry->address + entry->size;
8589 bfd_vma align_fill = nsm - ((addr + nsm) & nsm);
8590 fill_extra_space += align_fill;
8592 return fill_extra_space;
8596 /* First relaxation pass. */
8598 /* If the section contains relaxable literals, check each literal to
8599 see if it has the same value as another literal that has already
8600 been seen, either in the current section or a previous one. If so,
8601 add an entry to the per-section list of removed literals. The
8602 actual changes are deferred until the next pass. */
8605 compute_removed_literals (bfd *abfd,
8607 struct bfd_link_info *link_info,
8608 value_map_hash_table *values)
8610 xtensa_relax_info *relax_info;
8612 Elf_Internal_Rela *internal_relocs;
8613 source_reloc *src_relocs, *rel;
8614 bfd_boolean ok = TRUE;
8615 property_table_entry *prop_table = NULL;
8618 bfd_boolean last_loc_is_prev = FALSE;
8619 bfd_vma last_target_offset = 0;
8620 section_cache_t target_sec_cache;
8621 bfd_size_type sec_size;
8623 init_section_cache (&target_sec_cache);
8625 /* Do nothing if it is not a relaxable literal section. */
8626 relax_info = get_xtensa_relax_info (sec);
8627 BFD_ASSERT (relax_info);
8628 if (!relax_info->is_relaxable_literal_section)
8631 internal_relocs = retrieve_internal_relocs (abfd, sec,
8632 link_info->keep_memory);
8634 sec_size = bfd_get_section_limit (abfd, sec);
8635 contents = retrieve_contents (abfd, sec, link_info->keep_memory);
8636 if (contents == NULL && sec_size != 0)
8642 /* Sort the source_relocs by target offset. */
8643 src_relocs = relax_info->src_relocs;
8644 qsort (src_relocs, relax_info->src_count,
8645 sizeof (source_reloc), source_reloc_compare);
8646 qsort (internal_relocs, sec->reloc_count, sizeof (Elf_Internal_Rela),
8647 internal_reloc_compare);
8649 ptblsize = xtensa_read_table_entries (abfd, sec, &prop_table,
8650 XTENSA_PROP_SEC_NAME, FALSE);
8658 for (i = 0; i < relax_info->src_count; i++)
8660 Elf_Internal_Rela *irel = NULL;
8662 rel = &src_relocs[i];
8663 if (get_l32r_opcode () != rel->opcode)
8665 irel = get_irel_at_offset (sec, internal_relocs,
8666 rel->r_rel.target_offset);
8668 /* If the relocation on this is not a simple R_XTENSA_32 or
8669 R_XTENSA_PLT then do not consider it. This may happen when
8670 the difference of two symbols is used in a literal. */
8671 if (irel && (ELF32_R_TYPE (irel->r_info) != R_XTENSA_32
8672 && ELF32_R_TYPE (irel->r_info) != R_XTENSA_PLT))
8675 /* If the target_offset for this relocation is the same as the
8676 previous relocation, then we've already considered whether the
8677 literal can be coalesced. Skip to the next one.... */
8678 if (i != 0 && prev_i != -1
8679 && src_relocs[i-1].r_rel.target_offset == rel->r_rel.target_offset)
8683 if (last_loc_is_prev &&
8684 last_target_offset + 4 != rel->r_rel.target_offset)
8685 last_loc_is_prev = FALSE;
8687 /* Check if the relocation was from an L32R that is being removed
8688 because a CALLX was converted to a direct CALL, and check if
8689 there are no other relocations to the literal. */
8690 if (is_removable_literal (rel, i, src_relocs, relax_info->src_count,
8691 sec, prop_table, ptblsize))
8693 if (!remove_dead_literal (abfd, sec, link_info, internal_relocs,
8694 irel, rel, prop_table, ptblsize))
8699 last_target_offset = rel->r_rel.target_offset;
8703 if (!identify_literal_placement (abfd, sec, contents, link_info,
8705 &last_loc_is_prev, irel,
8706 relax_info->src_count - i, rel,
8707 prop_table, ptblsize,
8708 &target_sec_cache, rel->is_abs_literal))
8713 last_target_offset = rel->r_rel.target_offset;
8717 print_removed_literals (stderr, &relax_info->removed_list);
8718 print_action_list (stderr, &relax_info->action_list);
8724 free_section_cache (&target_sec_cache);
8726 release_contents (sec, contents);
8727 release_internal_relocs (sec, internal_relocs);
8732 static Elf_Internal_Rela *
8733 get_irel_at_offset (asection *sec,
8734 Elf_Internal_Rela *internal_relocs,
8738 Elf_Internal_Rela *irel;
8740 Elf_Internal_Rela key;
8742 if (!internal_relocs)
8745 key.r_offset = offset;
8746 irel = bsearch (&key, internal_relocs, sec->reloc_count,
8747 sizeof (Elf_Internal_Rela), internal_reloc_matches);
8751 /* bsearch does not guarantee which will be returned if there are
8752 multiple matches. We need the first that is not an alignment. */
8753 i = irel - internal_relocs;
8756 if (internal_relocs[i-1].r_offset != offset)
8760 for ( ; i < sec->reloc_count; i++)
8762 irel = &internal_relocs[i];
8763 r_type = ELF32_R_TYPE (irel->r_info);
8764 if (irel->r_offset == offset && r_type != R_XTENSA_NONE)
8773 is_removable_literal (const source_reloc *rel,
8775 const source_reloc *src_relocs,
8778 property_table_entry *prop_table,
8781 const source_reloc *curr_rel;
8782 property_table_entry *entry;
8787 entry = elf_xtensa_find_property_entry (prop_table, ptblsize,
8788 sec->vma + rel->r_rel.target_offset);
8789 if (entry && (entry->flags & XTENSA_PROP_NO_TRANSFORM))
8792 for (++i; i < src_count; ++i)
8794 curr_rel = &src_relocs[i];
8795 /* If all others have the same target offset.... */
8796 if (curr_rel->r_rel.target_offset != rel->r_rel.target_offset)
8799 if (!curr_rel->is_null
8800 && !xtensa_is_property_section (curr_rel->source_sec)
8801 && !(curr_rel->source_sec->flags & SEC_DEBUGGING))
8809 remove_dead_literal (bfd *abfd,
8811 struct bfd_link_info *link_info,
8812 Elf_Internal_Rela *internal_relocs,
8813 Elf_Internal_Rela *irel,
8815 property_table_entry *prop_table,
8818 property_table_entry *entry;
8819 xtensa_relax_info *relax_info;
8821 relax_info = get_xtensa_relax_info (sec);
8825 entry = elf_xtensa_find_property_entry (prop_table, ptblsize,
8826 sec->vma + rel->r_rel.target_offset);
8828 /* Mark the unused literal so that it will be removed. */
8829 add_removed_literal (&relax_info->removed_list, &rel->r_rel, NULL);
8831 text_action_add (&relax_info->action_list,
8832 ta_remove_literal, sec, rel->r_rel.target_offset, 4);
8834 /* If the section is 4-byte aligned, do not add fill. */
8835 if (sec->alignment_power > 2)
8837 int fill_extra_space;
8838 bfd_vma entry_sec_offset;
8840 property_table_entry *the_add_entry;
8844 entry_sec_offset = entry->address - sec->vma + entry->size;
8846 entry_sec_offset = rel->r_rel.target_offset + 4;
8848 /* If the literal range is at the end of the section,
8850 the_add_entry = elf_xtensa_find_property_entry (prop_table, ptblsize,
8852 fill_extra_space = xtensa_compute_fill_extra_space (the_add_entry);
8854 fa = find_fill_action (&relax_info->action_list, sec, entry_sec_offset);
8855 removed_diff = compute_removed_action_diff (fa, sec, entry_sec_offset,
8856 -4, fill_extra_space);
8858 adjust_fill_action (fa, removed_diff);
8860 text_action_add (&relax_info->action_list,
8861 ta_fill, sec, entry_sec_offset, removed_diff);
8864 /* Zero out the relocation on this literal location. */
8867 if (elf_hash_table (link_info)->dynamic_sections_created)
8868 shrink_dynamic_reloc_sections (link_info, abfd, sec, irel);
8870 irel->r_info = ELF32_R_INFO (0, R_XTENSA_NONE);
8871 pin_internal_relocs (sec, internal_relocs);
8874 /* Do not modify "last_loc_is_prev". */
8880 identify_literal_placement (bfd *abfd,
8883 struct bfd_link_info *link_info,
8884 value_map_hash_table *values,
8885 bfd_boolean *last_loc_is_prev_p,
8886 Elf_Internal_Rela *irel,
8887 int remaining_src_rels,
8889 property_table_entry *prop_table,
8891 section_cache_t *target_sec_cache,
8892 bfd_boolean is_abs_literal)
8896 xtensa_relax_info *relax_info;
8897 bfd_boolean literal_placed = FALSE;
8899 unsigned long value;
8900 bfd_boolean final_static_link;
8901 bfd_size_type sec_size;
8903 relax_info = get_xtensa_relax_info (sec);
8907 sec_size = bfd_get_section_limit (abfd, sec);
8910 (!bfd_link_relocatable (link_info)
8911 && !elf_hash_table (link_info)->dynamic_sections_created);
8913 /* The placement algorithm first checks to see if the literal is
8914 already in the value map. If so and the value map is reachable
8915 from all uses, then the literal is moved to that location. If
8916 not, then we identify the last location where a fresh literal was
8917 placed. If the literal can be safely moved there, then we do so.
8918 If not, then we assume that the literal is not to move and leave
8919 the literal where it is, marking it as the last literal
8922 /* Find the literal value. */
8924 r_reloc_init (&r_rel, abfd, irel, contents, sec_size);
8927 BFD_ASSERT (rel->r_rel.target_offset < sec_size);
8928 value = bfd_get_32 (abfd, contents + rel->r_rel.target_offset);
8930 init_literal_value (&val, &r_rel, value, is_abs_literal);
8932 /* Check if we've seen another literal with the same value that
8933 is in the same output section. */
8934 val_map = value_map_get_cached_value (values, &val, final_static_link);
8937 && (r_reloc_get_section (&val_map->loc)->output_section
8938 == sec->output_section)
8939 && relocations_reach (rel, remaining_src_rels, &val_map->loc)
8940 && coalesce_shared_literal (sec, rel, prop_table, ptblsize, val_map))
8942 /* No change to last_loc_is_prev. */
8943 literal_placed = TRUE;
8946 /* For relocatable links, do not try to move literals. To do it
8947 correctly might increase the number of relocations in an input
8948 section making the default relocatable linking fail. */
8949 if (!bfd_link_relocatable (link_info) && !literal_placed
8950 && values->has_last_loc && !(*last_loc_is_prev_p))
8952 asection *target_sec = r_reloc_get_section (&values->last_loc);
8953 if (target_sec && target_sec->output_section == sec->output_section)
8955 /* Increment the virtual offset. */
8956 r_reloc try_loc = values->last_loc;
8957 try_loc.virtual_offset += 4;
8959 /* There is a last loc that was in the same output section. */
8960 if (relocations_reach (rel, remaining_src_rels, &try_loc)
8961 && move_shared_literal (sec, link_info, rel,
8962 prop_table, ptblsize,
8963 &try_loc, &val, target_sec_cache))
8965 values->last_loc.virtual_offset += 4;
8966 literal_placed = TRUE;
8968 val_map = add_value_map (values, &val, &try_loc,
8971 val_map->loc = try_loc;
8976 if (!literal_placed)
8978 /* Nothing worked, leave the literal alone but update the last loc. */
8979 values->has_last_loc = TRUE;
8980 values->last_loc = rel->r_rel;
8982 val_map = add_value_map (values, &val, &rel->r_rel, final_static_link);
8984 val_map->loc = rel->r_rel;
8985 *last_loc_is_prev_p = TRUE;
8992 /* Check if the original relocations (presumably on L32R instructions)
8993 identified by reloc[0..N] can be changed to reference the literal
8994 identified by r_rel. If r_rel is out of range for any of the
8995 original relocations, then we don't want to coalesce the original
8996 literal with the one at r_rel. We only check reloc[0..N], where the
8997 offsets are all the same as for reloc[0] (i.e., they're all
8998 referencing the same literal) and where N is also bounded by the
8999 number of remaining entries in the "reloc" array. The "reloc" array
9000 is sorted by target offset so we know all the entries for the same
9001 literal will be contiguous. */
9004 relocations_reach (source_reloc *reloc,
9005 int remaining_relocs,
9006 const r_reloc *r_rel)
9008 bfd_vma from_offset, source_address, dest_address;
9012 if (!r_reloc_is_defined (r_rel))
9015 sec = r_reloc_get_section (r_rel);
9016 from_offset = reloc[0].r_rel.target_offset;
9018 for (i = 0; i < remaining_relocs; i++)
9020 if (reloc[i].r_rel.target_offset != from_offset)
9023 /* Ignore relocations that have been removed. */
9024 if (reloc[i].is_null)
9027 /* The original and new output section for these must be the same
9028 in order to coalesce. */
9029 if (r_reloc_get_section (&reloc[i].r_rel)->output_section
9030 != sec->output_section)
9033 /* Absolute literals in the same output section can always be
9035 if (reloc[i].is_abs_literal)
9038 /* A literal with no PC-relative relocations can be moved anywhere. */
9039 if (reloc[i].opnd != -1)
9041 /* Otherwise, check to see that it fits. */
9042 source_address = (reloc[i].source_sec->output_section->vma
9043 + reloc[i].source_sec->output_offset
9044 + reloc[i].r_rel.rela.r_offset);
9045 dest_address = (sec->output_section->vma
9046 + sec->output_offset
9047 + r_rel->target_offset);
9049 if (!pcrel_reloc_fits (reloc[i].opcode, reloc[i].opnd,
9050 source_address, dest_address))
9059 /* Move a literal to another literal location because it is
9060 the same as the other literal value. */
9063 coalesce_shared_literal (asection *sec,
9065 property_table_entry *prop_table,
9069 property_table_entry *entry;
9071 property_table_entry *the_add_entry;
9073 xtensa_relax_info *relax_info;
9075 relax_info = get_xtensa_relax_info (sec);
9079 entry = elf_xtensa_find_property_entry
9080 (prop_table, ptblsize, sec->vma + rel->r_rel.target_offset);
9081 if (entry && (entry->flags & XTENSA_PROP_NO_TRANSFORM))
9084 /* Mark that the literal will be coalesced. */
9085 add_removed_literal (&relax_info->removed_list, &rel->r_rel, &val_map->loc);
9087 text_action_add (&relax_info->action_list,
9088 ta_remove_literal, sec, rel->r_rel.target_offset, 4);
9090 /* If the section is 4-byte aligned, do not add fill. */
9091 if (sec->alignment_power > 2)
9093 int fill_extra_space;
9094 bfd_vma entry_sec_offset;
9097 entry_sec_offset = entry->address - sec->vma + entry->size;
9099 entry_sec_offset = rel->r_rel.target_offset + 4;
9101 /* If the literal range is at the end of the section,
9103 fill_extra_space = 0;
9104 the_add_entry = elf_xtensa_find_property_entry (prop_table, ptblsize,
9106 if (the_add_entry && (the_add_entry->flags & XTENSA_PROP_UNREACHABLE))
9107 fill_extra_space = the_add_entry->size;
9109 fa = find_fill_action (&relax_info->action_list, sec, entry_sec_offset);
9110 removed_diff = compute_removed_action_diff (fa, sec, entry_sec_offset,
9111 -4, fill_extra_space);
9113 adjust_fill_action (fa, removed_diff);
9115 text_action_add (&relax_info->action_list,
9116 ta_fill, sec, entry_sec_offset, removed_diff);
9123 /* Move a literal to another location. This may actually increase the
9124 total amount of space used because of alignments so we need to do
9125 this carefully. Also, it may make a branch go out of range. */
9128 move_shared_literal (asection *sec,
9129 struct bfd_link_info *link_info,
9131 property_table_entry *prop_table,
9133 const r_reloc *target_loc,
9134 const literal_value *lit_value,
9135 section_cache_t *target_sec_cache)
9137 property_table_entry *the_add_entry, *src_entry, *target_entry = NULL;
9138 text_action *fa, *target_fa;
9140 xtensa_relax_info *relax_info, *target_relax_info;
9141 asection *target_sec;
9143 ebb_constraint ebb_table;
9144 bfd_boolean relocs_fit;
9146 /* If this routine always returns FALSE, the literals that cannot be
9147 coalesced will not be moved. */
9148 if (elf32xtensa_no_literal_movement)
9151 relax_info = get_xtensa_relax_info (sec);
9155 target_sec = r_reloc_get_section (target_loc);
9156 target_relax_info = get_xtensa_relax_info (target_sec);
9158 /* Literals to undefined sections may not be moved because they
9159 must report an error. */
9160 if (bfd_is_und_section (target_sec))
9163 src_entry = elf_xtensa_find_property_entry
9164 (prop_table, ptblsize, sec->vma + rel->r_rel.target_offset);
9166 if (!section_cache_section (target_sec_cache, target_sec, link_info))
9169 target_entry = elf_xtensa_find_property_entry
9170 (target_sec_cache->ptbl, target_sec_cache->pte_count,
9171 target_sec->vma + target_loc->target_offset);
9176 /* Make sure that we have not broken any branches. */
9179 init_ebb_constraint (&ebb_table);
9180 ebb = &ebb_table.ebb;
9181 init_ebb (ebb, target_sec_cache->sec, target_sec_cache->contents,
9182 target_sec_cache->content_length,
9183 target_sec_cache->ptbl, target_sec_cache->pte_count,
9184 target_sec_cache->relocs, target_sec_cache->reloc_count);
9186 /* Propose to add 4 bytes + worst-case alignment size increase to
9188 ebb_propose_action (&ebb_table, EBB_NO_ALIGN, 0,
9189 ta_fill, target_loc->target_offset,
9190 -4 - (1 << target_sec->alignment_power), TRUE);
9192 /* Check all of the PC-relative relocations to make sure they still fit. */
9193 relocs_fit = check_section_ebb_pcrels_fit (target_sec->owner, target_sec,
9194 target_sec_cache->contents,
9195 target_sec_cache->relocs, NULL,
9201 text_action_add_literal (&target_relax_info->action_list,
9202 ta_add_literal, target_loc, lit_value, -4);
9204 if (target_sec->alignment_power > 2 && target_entry != src_entry)
9206 /* May need to add or remove some fill to maintain alignment. */
9207 int fill_extra_space;
9208 bfd_vma entry_sec_offset;
9211 target_entry->address - target_sec->vma + target_entry->size;
9213 /* If the literal range is at the end of the section,
9215 fill_extra_space = 0;
9217 elf_xtensa_find_property_entry (target_sec_cache->ptbl,
9218 target_sec_cache->pte_count,
9220 if (the_add_entry && (the_add_entry->flags & XTENSA_PROP_UNREACHABLE))
9221 fill_extra_space = the_add_entry->size;
9223 target_fa = find_fill_action (&target_relax_info->action_list,
9224 target_sec, entry_sec_offset);
9225 removed_diff = compute_removed_action_diff (target_fa, target_sec,
9226 entry_sec_offset, 4,
9229 adjust_fill_action (target_fa, removed_diff);
9231 text_action_add (&target_relax_info->action_list,
9232 ta_fill, target_sec, entry_sec_offset, removed_diff);
9235 /* Mark that the literal will be moved to the new location. */
9236 add_removed_literal (&relax_info->removed_list, &rel->r_rel, target_loc);
9238 /* Remove the literal. */
9239 text_action_add (&relax_info->action_list,
9240 ta_remove_literal, sec, rel->r_rel.target_offset, 4);
9242 /* If the section is 4-byte aligned, do not add fill. */
9243 if (sec->alignment_power > 2 && target_entry != src_entry)
9245 int fill_extra_space;
9246 bfd_vma entry_sec_offset;
9249 entry_sec_offset = src_entry->address - sec->vma + src_entry->size;
9251 entry_sec_offset = rel->r_rel.target_offset+4;
9253 /* If the literal range is at the end of the section,
9255 fill_extra_space = 0;
9256 the_add_entry = elf_xtensa_find_property_entry (prop_table, ptblsize,
9258 if (the_add_entry && (the_add_entry->flags & XTENSA_PROP_UNREACHABLE))
9259 fill_extra_space = the_add_entry->size;
9261 fa = find_fill_action (&relax_info->action_list, sec, entry_sec_offset);
9262 removed_diff = compute_removed_action_diff (fa, sec, entry_sec_offset,
9263 -4, fill_extra_space);
9265 adjust_fill_action (fa, removed_diff);
9267 text_action_add (&relax_info->action_list,
9268 ta_fill, sec, entry_sec_offset, removed_diff);
9275 /* Second relaxation pass. */
9278 action_remove_bytes_fn (splay_tree_node node, void *p)
9280 bfd_size_type *final_size = p;
9281 text_action *action = (text_action *)node->value;
9283 *final_size -= action->removed_bytes;
9287 /* Modify all of the relocations to point to the right spot, and if this
9288 is a relaxable section, delete the unwanted literals and fix the
9292 relax_section (bfd *abfd, asection *sec, struct bfd_link_info *link_info)
9294 Elf_Internal_Rela *internal_relocs;
9295 xtensa_relax_info *relax_info;
9297 bfd_boolean ok = TRUE;
9299 bfd_boolean rv = FALSE;
9300 bfd_boolean virtual_action;
9301 bfd_size_type sec_size;
9303 sec_size = bfd_get_section_limit (abfd, sec);
9304 relax_info = get_xtensa_relax_info (sec);
9305 BFD_ASSERT (relax_info);
9307 /* First translate any of the fixes that have been added already. */
9308 translate_section_fixes (sec);
9310 /* Handle property sections (e.g., literal tables) specially. */
9311 if (xtensa_is_property_section (sec))
9313 BFD_ASSERT (!relax_info->is_relaxable_literal_section);
9314 return relax_property_section (abfd, sec, link_info);
9317 internal_relocs = retrieve_internal_relocs (abfd, sec,
9318 link_info->keep_memory);
9319 if (!internal_relocs && !action_list_count (&relax_info->action_list))
9322 contents = retrieve_contents (abfd, sec, link_info->keep_memory);
9323 if (contents == NULL && sec_size != 0)
9329 if (internal_relocs)
9331 for (i = 0; i < sec->reloc_count; i++)
9333 Elf_Internal_Rela *irel;
9334 xtensa_relax_info *target_relax_info;
9335 bfd_vma source_offset, old_source_offset;
9338 asection *target_sec;
9340 /* Locally change the source address.
9341 Translate the target to the new target address.
9342 If it points to this section and has been removed,
9346 irel = &internal_relocs[i];
9347 source_offset = irel->r_offset;
9348 old_source_offset = source_offset;
9350 r_type = ELF32_R_TYPE (irel->r_info);
9351 r_reloc_init (&r_rel, abfd, irel, contents,
9352 bfd_get_section_limit (abfd, sec));
9354 /* If this section could have changed then we may need to
9355 change the relocation's offset. */
9357 if (relax_info->is_relaxable_literal_section
9358 || relax_info->is_relaxable_asm_section)
9360 pin_internal_relocs (sec, internal_relocs);
9362 if (r_type != R_XTENSA_NONE
9363 && find_removed_literal (&relax_info->removed_list,
9366 /* Remove this relocation. */
9367 if (elf_hash_table (link_info)->dynamic_sections_created)
9368 shrink_dynamic_reloc_sections (link_info, abfd, sec, irel);
9369 irel->r_info = ELF32_R_INFO (0, R_XTENSA_NONE);
9370 irel->r_offset = offset_with_removed_text_map
9371 (&relax_info->action_list, irel->r_offset);
9375 if (r_type == R_XTENSA_ASM_SIMPLIFY)
9377 text_action *action =
9378 find_insn_action (&relax_info->action_list,
9380 if (action && (action->action == ta_convert_longcall
9381 || action->action == ta_remove_longcall))
9383 bfd_reloc_status_type retval;
9384 char *error_message = NULL;
9386 retval = contract_asm_expansion (contents, sec_size,
9387 irel, &error_message);
9388 if (retval != bfd_reloc_ok)
9390 (*link_info->callbacks->reloc_dangerous)
9391 (link_info, error_message, abfd, sec,
9395 /* Update the action so that the code that moves
9396 the contents will do the right thing. */
9397 /* ta_remove_longcall and ta_remove_insn actions are
9398 grouped together in the tree as well as
9399 ta_convert_longcall and ta_none, so that changes below
9400 can be done w/o removing and reinserting action into
9403 if (action->action == ta_remove_longcall)
9404 action->action = ta_remove_insn;
9406 action->action = ta_none;
9407 /* Refresh the info in the r_rel. */
9408 r_reloc_init (&r_rel, abfd, irel, contents, sec_size);
9409 r_type = ELF32_R_TYPE (irel->r_info);
9413 source_offset = offset_with_removed_text_map
9414 (&relax_info->action_list, irel->r_offset);
9415 irel->r_offset = source_offset;
9418 /* If the target section could have changed then
9419 we may need to change the relocation's target offset. */
9421 target_sec = r_reloc_get_section (&r_rel);
9423 /* For a reference to a discarded section from a DWARF section,
9424 i.e., where action_discarded is PRETEND, the symbol will
9425 eventually be modified to refer to the kept section (at least if
9426 the kept and discarded sections are the same size). Anticipate
9427 that here and adjust things accordingly. */
9428 if (! elf_xtensa_ignore_discarded_relocs (sec)
9429 && elf_xtensa_action_discarded (sec) == PRETEND
9430 && sec->sec_info_type != SEC_INFO_TYPE_STABS
9431 && target_sec != NULL
9432 && discarded_section (target_sec))
9434 /* It would be natural to call _bfd_elf_check_kept_section
9435 here, but it's not exported from elflink.c. It's also a
9436 fairly expensive check. Adjusting the relocations to the
9437 discarded section is fairly harmless; it will only adjust
9438 some addends and difference values. If it turns out that
9439 _bfd_elf_check_kept_section fails later, it won't matter,
9440 so just compare the section names to find the right group
9442 asection *kept = target_sec->kept_section;
9445 if ((kept->flags & SEC_GROUP) != 0)
9447 asection *first = elf_next_in_group (kept);
9448 asection *s = first;
9453 if (strcmp (s->name, target_sec->name) == 0)
9458 s = elf_next_in_group (s);
9465 && ((target_sec->rawsize != 0
9466 ? target_sec->rawsize : target_sec->size)
9467 == (kept->rawsize != 0 ? kept->rawsize : kept->size)))
9471 target_relax_info = get_xtensa_relax_info (target_sec);
9472 if (target_relax_info
9473 && (target_relax_info->is_relaxable_literal_section
9474 || target_relax_info->is_relaxable_asm_section))
9477 target_sec = translate_reloc (&r_rel, &new_reloc, target_sec);
9479 if (r_type == R_XTENSA_DIFF8
9480 || r_type == R_XTENSA_DIFF16
9481 || r_type == R_XTENSA_DIFF32)
9483 bfd_signed_vma diff_value = 0;
9484 bfd_vma new_end_offset, diff_mask = 0;
9486 if (bfd_get_section_limit (abfd, sec) < old_source_offset)
9488 (*link_info->callbacks->reloc_dangerous)
9489 (link_info, _("invalid relocation address"),
9490 abfd, sec, old_source_offset);
9496 case R_XTENSA_DIFF8:
9498 bfd_get_signed_8 (abfd, &contents[old_source_offset]);
9500 case R_XTENSA_DIFF16:
9502 bfd_get_signed_16 (abfd, &contents[old_source_offset]);
9504 case R_XTENSA_DIFF32:
9506 bfd_get_signed_32 (abfd, &contents[old_source_offset]);
9510 new_end_offset = offset_with_removed_text_map
9511 (&target_relax_info->action_list,
9512 r_rel.target_offset + diff_value);
9513 diff_value = new_end_offset - new_reloc.target_offset;
9517 case R_XTENSA_DIFF8:
9519 bfd_put_signed_8 (abfd, diff_value,
9520 &contents[old_source_offset]);
9522 case R_XTENSA_DIFF16:
9524 bfd_put_signed_16 (abfd, diff_value,
9525 &contents[old_source_offset]);
9527 case R_XTENSA_DIFF32:
9528 diff_mask = 0x7fffffff;
9529 bfd_put_signed_32 (abfd, diff_value,
9530 &contents[old_source_offset]);
9534 /* Check for overflow. Sign bits must be all zeroes or all ones */
9535 if ((diff_value & ~diff_mask) != 0 &&
9536 (diff_value & ~diff_mask) != (-1 & ~diff_mask))
9538 (*link_info->callbacks->reloc_dangerous)
9539 (link_info, _("overflow after relaxation"),
9540 abfd, sec, old_source_offset);
9544 pin_contents (sec, contents);
9547 /* If the relocation still references a section in the same
9548 input file, modify the relocation directly instead of
9549 adding a "fix" record. */
9550 if (target_sec->owner == abfd)
9552 unsigned r_symndx = ELF32_R_SYM (new_reloc.rela.r_info);
9553 irel->r_info = ELF32_R_INFO (r_symndx, r_type);
9554 irel->r_addend = new_reloc.rela.r_addend;
9555 pin_internal_relocs (sec, internal_relocs);
9559 bfd_vma addend_displacement;
9562 addend_displacement =
9563 new_reloc.target_offset + new_reloc.virtual_offset;
9564 fix = reloc_bfd_fix_init (sec, source_offset, r_type,
9566 addend_displacement, TRUE);
9573 if ((relax_info->is_relaxable_literal_section
9574 || relax_info->is_relaxable_asm_section)
9575 && action_list_count (&relax_info->action_list))
9577 /* Walk through the planned actions and build up a table
9578 of move, copy and fill records. Use the move, copy and
9579 fill records to perform the actions once. */
9581 bfd_size_type final_size, copy_size, orig_insn_size;
9582 bfd_byte *scratch = NULL;
9583 bfd_byte *dup_contents = NULL;
9584 bfd_size_type orig_size = sec->size;
9585 bfd_vma orig_dot = 0;
9586 bfd_vma orig_dot_copied = 0; /* Byte copied already from
9587 orig dot in physical memory. */
9588 bfd_vma orig_dot_vo = 0; /* Virtual offset from orig_dot. */
9589 bfd_vma dup_dot = 0;
9591 text_action *action;
9593 final_size = sec->size;
9595 splay_tree_foreach (relax_info->action_list.tree,
9596 action_remove_bytes_fn, &final_size);
9597 scratch = (bfd_byte *) bfd_zmalloc (final_size);
9598 dup_contents = (bfd_byte *) bfd_zmalloc (final_size);
9600 /* The dot is the current fill location. */
9602 print_action_list (stderr, &relax_info->action_list);
9605 for (action = action_first (&relax_info->action_list); action;
9606 action = action_next (&relax_info->action_list, action))
9608 virtual_action = FALSE;
9609 if (action->offset > orig_dot)
9611 orig_dot += orig_dot_copied;
9612 orig_dot_copied = 0;
9614 /* Out of the virtual world. */
9617 if (action->offset > orig_dot)
9619 copy_size = action->offset - orig_dot;
9620 memmove (&dup_contents[dup_dot], &contents[orig_dot], copy_size);
9621 orig_dot += copy_size;
9622 dup_dot += copy_size;
9623 BFD_ASSERT (action->offset == orig_dot);
9625 else if (action->offset < orig_dot)
9627 if (action->action == ta_fill
9628 && action->offset - action->removed_bytes == orig_dot)
9630 /* This is OK because the fill only effects the dup_dot. */
9632 else if (action->action == ta_add_literal)
9634 /* TBD. Might need to handle this. */
9637 if (action->offset == orig_dot)
9639 if (action->virtual_offset > orig_dot_vo)
9641 if (orig_dot_vo == 0)
9643 /* Need to copy virtual_offset bytes. Probably four. */
9644 copy_size = action->virtual_offset - orig_dot_vo;
9645 memmove (&dup_contents[dup_dot],
9646 &contents[orig_dot], copy_size);
9647 orig_dot_copied = copy_size;
9648 dup_dot += copy_size;
9650 virtual_action = TRUE;
9653 BFD_ASSERT (action->virtual_offset <= orig_dot_vo);
9655 switch (action->action)
9657 case ta_remove_literal:
9658 case ta_remove_insn:
9659 BFD_ASSERT (action->removed_bytes >= 0);
9660 orig_dot += action->removed_bytes;
9663 case ta_narrow_insn:
9666 memmove (scratch, &contents[orig_dot], orig_insn_size);
9667 BFD_ASSERT (action->removed_bytes == 1);
9668 rv = narrow_instruction (scratch, final_size, 0);
9670 memmove (&dup_contents[dup_dot], scratch, copy_size);
9671 orig_dot += orig_insn_size;
9672 dup_dot += copy_size;
9676 if (action->removed_bytes >= 0)
9677 orig_dot += action->removed_bytes;
9680 /* Already zeroed in dup_contents. Just bump the
9682 dup_dot += (-action->removed_bytes);
9687 BFD_ASSERT (action->removed_bytes == 0);
9690 case ta_convert_longcall:
9691 case ta_remove_longcall:
9692 /* These will be removed or converted before we get here. */
9699 memmove (scratch, &contents[orig_dot], orig_insn_size);
9700 BFD_ASSERT (action->removed_bytes == -1);
9701 rv = widen_instruction (scratch, final_size, 0);
9703 memmove (&dup_contents[dup_dot], scratch, copy_size);
9704 orig_dot += orig_insn_size;
9705 dup_dot += copy_size;
9708 case ta_add_literal:
9711 BFD_ASSERT (action->removed_bytes == -4);
9712 /* TBD -- place the literal value here and insert
9714 memset (&dup_contents[dup_dot], 0, 4);
9715 pin_internal_relocs (sec, internal_relocs);
9716 pin_contents (sec, contents);
9718 if (!move_literal (abfd, link_info, sec, dup_dot, dup_contents,
9719 relax_info, &internal_relocs, &action->value))
9723 orig_dot_vo += copy_size;
9725 orig_dot += orig_insn_size;
9726 dup_dot += copy_size;
9730 /* Not implemented yet. */
9735 BFD_ASSERT (dup_dot <= final_size);
9736 BFD_ASSERT (orig_dot <= orig_size);
9739 orig_dot += orig_dot_copied;
9740 orig_dot_copied = 0;
9742 if (orig_dot != orig_size)
9744 copy_size = orig_size - orig_dot;
9745 BFD_ASSERT (orig_size > orig_dot);
9746 BFD_ASSERT (dup_dot + copy_size == final_size);
9747 memmove (&dup_contents[dup_dot], &contents[orig_dot], copy_size);
9748 orig_dot += copy_size;
9749 dup_dot += copy_size;
9751 BFD_ASSERT (orig_size == orig_dot);
9752 BFD_ASSERT (final_size == dup_dot);
9754 /* Move the dup_contents back. */
9755 if (final_size > orig_size)
9757 /* Contents need to be reallocated. Swap the dup_contents into
9759 sec->contents = dup_contents;
9761 contents = dup_contents;
9762 pin_contents (sec, contents);
9766 BFD_ASSERT (final_size <= orig_size);
9767 memset (contents, 0, orig_size);
9768 memcpy (contents, dup_contents, final_size);
9769 free (dup_contents);
9772 pin_contents (sec, contents);
9774 if (sec->rawsize == 0)
9775 sec->rawsize = sec->size;
9776 sec->size = final_size;
9780 release_internal_relocs (sec, internal_relocs);
9781 release_contents (sec, contents);
9787 translate_section_fixes (asection *sec)
9789 xtensa_relax_info *relax_info;
9792 relax_info = get_xtensa_relax_info (sec);
9796 for (r = relax_info->fix_list; r != NULL; r = r->next)
9797 if (!translate_reloc_bfd_fix (r))
9804 /* Translate a fix given the mapping in the relax info for the target
9805 section. If it has already been translated, no work is required. */
9808 translate_reloc_bfd_fix (reloc_bfd_fix *fix)
9810 reloc_bfd_fix new_fix;
9812 xtensa_relax_info *relax_info;
9813 removed_literal *removed;
9814 bfd_vma new_offset, target_offset;
9816 if (fix->translated)
9819 sec = fix->target_sec;
9820 target_offset = fix->target_offset;
9822 relax_info = get_xtensa_relax_info (sec);
9825 fix->translated = TRUE;
9831 /* The fix does not need to be translated if the section cannot change. */
9832 if (!relax_info->is_relaxable_literal_section
9833 && !relax_info->is_relaxable_asm_section)
9835 fix->translated = TRUE;
9839 /* If the literal has been moved and this relocation was on an
9840 opcode, then the relocation should move to the new literal
9841 location. Otherwise, the relocation should move within the
9845 if (is_operand_relocation (fix->src_type))
9847 /* Check if the original relocation is against a literal being
9849 removed = find_removed_literal (&relax_info->removed_list,
9857 /* The fact that there is still a relocation to this literal indicates
9858 that the literal is being coalesced, not simply removed. */
9859 BFD_ASSERT (removed->to.abfd != NULL);
9861 /* This was moved to some other address (possibly another section). */
9862 new_sec = r_reloc_get_section (&removed->to);
9866 relax_info = get_xtensa_relax_info (sec);
9868 (!relax_info->is_relaxable_literal_section
9869 && !relax_info->is_relaxable_asm_section))
9871 target_offset = removed->to.target_offset;
9872 new_fix.target_sec = new_sec;
9873 new_fix.target_offset = target_offset;
9874 new_fix.translated = TRUE;
9879 target_offset = removed->to.target_offset;
9880 new_fix.target_sec = new_sec;
9883 /* The target address may have been moved within its section. */
9884 new_offset = offset_with_removed_text (&relax_info->action_list,
9887 new_fix.target_offset = new_offset;
9888 new_fix.target_offset = new_offset;
9889 new_fix.translated = TRUE;
9895 /* Fix up a relocation to take account of removed literals. */
9898 translate_reloc (const r_reloc *orig_rel, r_reloc *new_rel, asection *sec)
9900 xtensa_relax_info *relax_info;
9901 removed_literal *removed;
9902 bfd_vma target_offset, base_offset;
9904 *new_rel = *orig_rel;
9906 if (!r_reloc_is_defined (orig_rel))
9909 relax_info = get_xtensa_relax_info (sec);
9910 BFD_ASSERT (relax_info && (relax_info->is_relaxable_literal_section
9911 || relax_info->is_relaxable_asm_section));
9913 target_offset = orig_rel->target_offset;
9916 if (is_operand_relocation (ELF32_R_TYPE (orig_rel->rela.r_info)))
9918 /* Check if the original relocation is against a literal being
9920 removed = find_removed_literal (&relax_info->removed_list,
9923 if (removed && removed->to.abfd)
9927 /* The fact that there is still a relocation to this literal indicates
9928 that the literal is being coalesced, not simply removed. */
9929 BFD_ASSERT (removed->to.abfd != NULL);
9931 /* This was moved to some other address
9932 (possibly in another section). */
9933 *new_rel = removed->to;
9934 new_sec = r_reloc_get_section (new_rel);
9938 relax_info = get_xtensa_relax_info (sec);
9940 || (!relax_info->is_relaxable_literal_section
9941 && !relax_info->is_relaxable_asm_section))
9944 target_offset = new_rel->target_offset;
9947 /* Find the base offset of the reloc symbol, excluding any addend from the
9948 reloc or from the section contents (for a partial_inplace reloc). Then
9949 find the adjusted values of the offsets due to relaxation. The base
9950 offset is needed to determine the change to the reloc's addend; the reloc
9951 addend should not be adjusted due to relaxations located before the base
9954 base_offset = r_reloc_get_target_offset (new_rel) - new_rel->rela.r_addend;
9955 if (base_offset <= target_offset)
9957 int base_removed = removed_by_actions_map (&relax_info->action_list,
9958 base_offset, FALSE);
9959 int addend_removed = removed_by_actions_map (&relax_info->action_list,
9960 target_offset, FALSE) -
9963 new_rel->target_offset = target_offset - base_removed - addend_removed;
9964 new_rel->rela.r_addend -= addend_removed;
9968 /* Handle a negative addend. The base offset comes first. */
9969 int tgt_removed = removed_by_actions_map (&relax_info->action_list,
9970 target_offset, FALSE);
9971 int addend_removed = removed_by_actions_map (&relax_info->action_list,
9972 base_offset, FALSE) -
9975 new_rel->target_offset = target_offset - tgt_removed;
9976 new_rel->rela.r_addend += addend_removed;
9983 /* For dynamic links, there may be a dynamic relocation for each
9984 literal. The number of dynamic relocations must be computed in
9985 size_dynamic_sections, which occurs before relaxation. When a
9986 literal is removed, this function checks if there is a corresponding
9987 dynamic relocation and shrinks the size of the appropriate dynamic
9988 relocation section accordingly. At this point, the contents of the
9989 dynamic relocation sections have not yet been filled in, so there's
9990 nothing else that needs to be done. */
9993 shrink_dynamic_reloc_sections (struct bfd_link_info *info,
9995 asection *input_section,
9996 Elf_Internal_Rela *rel)
9998 struct elf_xtensa_link_hash_table *htab;
9999 Elf_Internal_Shdr *symtab_hdr;
10000 struct elf_link_hash_entry **sym_hashes;
10001 unsigned long r_symndx;
10003 struct elf_link_hash_entry *h;
10004 bfd_boolean dynamic_symbol;
10006 htab = elf_xtensa_hash_table (info);
10010 symtab_hdr = &elf_tdata (abfd)->symtab_hdr;
10011 sym_hashes = elf_sym_hashes (abfd);
10013 r_type = ELF32_R_TYPE (rel->r_info);
10014 r_symndx = ELF32_R_SYM (rel->r_info);
10016 if (r_symndx < symtab_hdr->sh_info)
10019 h = sym_hashes[r_symndx - symtab_hdr->sh_info];
10021 dynamic_symbol = elf_xtensa_dynamic_symbol_p (h, info);
10023 if ((r_type == R_XTENSA_32 || r_type == R_XTENSA_PLT)
10024 && (input_section->flags & SEC_ALLOC) != 0
10025 && (dynamic_symbol || bfd_link_pic (info))
10026 && (!h || h->root.type != bfd_link_hash_undefweak
10027 || (dynamic_symbol && bfd_link_dll (info))))
10030 bfd_boolean is_plt = FALSE;
10032 if (dynamic_symbol && r_type == R_XTENSA_PLT)
10034 srel = htab->elf.srelplt;
10038 srel = htab->elf.srelgot;
10040 /* Reduce size of the .rela.* section by one reloc. */
10041 BFD_ASSERT (srel != NULL);
10042 BFD_ASSERT (srel->size >= sizeof (Elf32_External_Rela));
10043 srel->size -= sizeof (Elf32_External_Rela);
10047 asection *splt, *sgotplt, *srelgot;
10048 int reloc_index, chunk;
10050 /* Find the PLT reloc index of the entry being removed. This
10051 is computed from the size of ".rela.plt". It is needed to
10052 figure out which PLT chunk to resize. Usually "last index
10053 = size - 1" since the index starts at zero, but in this
10054 context, the size has just been decremented so there's no
10055 need to subtract one. */
10056 reloc_index = srel->size / sizeof (Elf32_External_Rela);
10058 chunk = reloc_index / PLT_ENTRIES_PER_CHUNK;
10059 splt = elf_xtensa_get_plt_section (info, chunk);
10060 sgotplt = elf_xtensa_get_gotplt_section (info, chunk);
10061 BFD_ASSERT (splt != NULL && sgotplt != NULL);
10063 /* Check if an entire PLT chunk has just been eliminated. */
10064 if (reloc_index % PLT_ENTRIES_PER_CHUNK == 0)
10066 /* The two magic GOT entries for that chunk can go away. */
10067 srelgot = htab->elf.srelgot;
10068 BFD_ASSERT (srelgot != NULL);
10069 srelgot->reloc_count -= 2;
10070 srelgot->size -= 2 * sizeof (Elf32_External_Rela);
10071 sgotplt->size -= 8;
10073 /* There should be only one entry left (and it will be
10075 BFD_ASSERT (sgotplt->size == 4);
10076 BFD_ASSERT (splt->size == PLT_ENTRY_SIZE);
10079 BFD_ASSERT (sgotplt->size >= 4);
10080 BFD_ASSERT (splt->size >= PLT_ENTRY_SIZE);
10082 sgotplt->size -= 4;
10083 splt->size -= PLT_ENTRY_SIZE;
10089 /* Take an r_rel and move it to another section. This usually
10090 requires extending the interal_relocation array and pinning it. If
10091 the original r_rel is from the same BFD, we can complete this here.
10092 Otherwise, we add a fix record to let the final link fix the
10093 appropriate address. Contents and internal relocations for the
10094 section must be pinned after calling this routine. */
10097 move_literal (bfd *abfd,
10098 struct bfd_link_info *link_info,
10101 bfd_byte *contents,
10102 xtensa_relax_info *relax_info,
10103 Elf_Internal_Rela **internal_relocs_p,
10104 const literal_value *lit)
10106 Elf_Internal_Rela *new_relocs = NULL;
10107 size_t new_relocs_count = 0;
10108 Elf_Internal_Rela this_rela;
10109 const r_reloc *r_rel;
10111 r_rel = &lit->r_rel;
10112 BFD_ASSERT (elf_section_data (sec)->relocs == *internal_relocs_p);
10114 if (r_reloc_is_const (r_rel))
10115 bfd_put_32 (abfd, lit->value, contents + offset);
10120 reloc_bfd_fix *fix;
10121 unsigned insert_at;
10123 r_type = ELF32_R_TYPE (r_rel->rela.r_info);
10125 /* This is the difficult case. We have to create a fix up. */
10126 this_rela.r_offset = offset;
10127 this_rela.r_info = ELF32_R_INFO (0, r_type);
10128 this_rela.r_addend =
10129 r_rel->target_offset - r_reloc_get_target_offset (r_rel);
10130 bfd_put_32 (abfd, lit->value, contents + offset);
10132 /* Currently, we cannot move relocations during a relocatable link. */
10133 BFD_ASSERT (!bfd_link_relocatable (link_info));
10134 fix = reloc_bfd_fix_init (sec, offset, r_type,
10135 r_reloc_get_section (r_rel),
10136 r_rel->target_offset + r_rel->virtual_offset,
10138 /* We also need to mark that relocations are needed here. */
10139 sec->flags |= SEC_RELOC;
10141 translate_reloc_bfd_fix (fix);
10142 /* This fix has not yet been translated. */
10143 add_fix (sec, fix);
10145 /* Add the relocation. If we have already allocated our own
10146 space for the relocations and we have room for more, then use
10147 it. Otherwise, allocate new space and move the literals. */
10148 insert_at = sec->reloc_count;
10149 for (i = 0; i < sec->reloc_count; ++i)
10151 if (this_rela.r_offset < (*internal_relocs_p)[i].r_offset)
10158 if (*internal_relocs_p != relax_info->allocated_relocs
10159 || sec->reloc_count + 1 > relax_info->allocated_relocs_count)
10161 BFD_ASSERT (relax_info->allocated_relocs == NULL
10162 || sec->reloc_count == relax_info->relocs_count);
10164 if (relax_info->allocated_relocs_count == 0)
10165 new_relocs_count = (sec->reloc_count + 2) * 2;
10167 new_relocs_count = (relax_info->allocated_relocs_count + 2) * 2;
10169 new_relocs = (Elf_Internal_Rela *)
10170 bfd_zmalloc (sizeof (Elf_Internal_Rela) * (new_relocs_count));
10174 /* We could handle this more quickly by finding the split point. */
10175 if (insert_at != 0)
10176 memcpy (new_relocs, *internal_relocs_p,
10177 insert_at * sizeof (Elf_Internal_Rela));
10179 new_relocs[insert_at] = this_rela;
10181 if (insert_at != sec->reloc_count)
10182 memcpy (new_relocs + insert_at + 1,
10183 (*internal_relocs_p) + insert_at,
10184 (sec->reloc_count - insert_at)
10185 * sizeof (Elf_Internal_Rela));
10187 if (*internal_relocs_p != relax_info->allocated_relocs)
10189 /* The first time we re-allocate, we can only free the
10190 old relocs if they were allocated with bfd_malloc.
10191 This is not true when keep_memory is in effect. */
10192 if (!link_info->keep_memory)
10193 free (*internal_relocs_p);
10196 free (*internal_relocs_p);
10197 relax_info->allocated_relocs = new_relocs;
10198 relax_info->allocated_relocs_count = new_relocs_count;
10199 elf_section_data (sec)->relocs = new_relocs;
10200 sec->reloc_count++;
10201 relax_info->relocs_count = sec->reloc_count;
10202 *internal_relocs_p = new_relocs;
10206 if (insert_at != sec->reloc_count)
10209 for (idx = sec->reloc_count; idx > insert_at; idx--)
10210 (*internal_relocs_p)[idx] = (*internal_relocs_p)[idx-1];
10212 (*internal_relocs_p)[insert_at] = this_rela;
10213 sec->reloc_count++;
10214 if (relax_info->allocated_relocs)
10215 relax_info->relocs_count = sec->reloc_count;
10222 /* This is similar to relax_section except that when a target is moved,
10223 we shift addresses up. We also need to modify the size. This
10224 algorithm does NOT allow for relocations into the middle of the
10225 property sections. */
10228 relax_property_section (bfd *abfd,
10230 struct bfd_link_info *link_info)
10232 Elf_Internal_Rela *internal_relocs;
10233 bfd_byte *contents;
10235 bfd_boolean ok = TRUE;
10236 bfd_boolean is_full_prop_section;
10237 size_t last_zfill_target_offset = 0;
10238 asection *last_zfill_target_sec = NULL;
10239 bfd_size_type sec_size;
10240 bfd_size_type entry_size;
10242 sec_size = bfd_get_section_limit (abfd, sec);
10243 internal_relocs = retrieve_internal_relocs (abfd, sec,
10244 link_info->keep_memory);
10245 contents = retrieve_contents (abfd, sec, link_info->keep_memory);
10246 if (contents == NULL && sec_size != 0)
10252 is_full_prop_section = xtensa_is_proptable_section (sec);
10253 if (is_full_prop_section)
10258 if (internal_relocs)
10260 for (i = 0; i < sec->reloc_count; i++)
10262 Elf_Internal_Rela *irel;
10263 xtensa_relax_info *target_relax_info;
10265 asection *target_sec;
10267 bfd_byte *size_p, *flags_p;
10269 /* Locally change the source address.
10270 Translate the target to the new target address.
10271 If it points to this section and has been removed, MOVE IT.
10272 Also, don't forget to modify the associated SIZE at
10275 irel = &internal_relocs[i];
10276 r_type = ELF32_R_TYPE (irel->r_info);
10277 if (r_type == R_XTENSA_NONE)
10280 /* Find the literal value. */
10281 r_reloc_init (&val.r_rel, abfd, irel, contents, sec_size);
10282 size_p = &contents[irel->r_offset + 4];
10284 if (is_full_prop_section)
10285 flags_p = &contents[irel->r_offset + 8];
10286 BFD_ASSERT (irel->r_offset + entry_size <= sec_size);
10288 target_sec = r_reloc_get_section (&val.r_rel);
10289 target_relax_info = get_xtensa_relax_info (target_sec);
10291 if (target_relax_info
10292 && (target_relax_info->is_relaxable_literal_section
10293 || target_relax_info->is_relaxable_asm_section ))
10295 /* Translate the relocation's destination. */
10296 bfd_vma old_offset = val.r_rel.target_offset;
10297 bfd_vma new_offset;
10298 long old_size, new_size;
10299 int removed_by_old_offset =
10300 removed_by_actions_map (&target_relax_info->action_list,
10301 old_offset, FALSE);
10302 new_offset = old_offset - removed_by_old_offset;
10304 /* Assert that we are not out of bounds. */
10305 old_size = bfd_get_32 (abfd, size_p);
10306 new_size = old_size;
10310 /* Only the first zero-sized unreachable entry is
10311 allowed to expand. In this case the new offset
10312 should be the offset before the fill and the new
10313 size is the expansion size. For other zero-sized
10314 entries the resulting size should be zero with an
10315 offset before or after the fill address depending
10316 on whether the expanding unreachable entry
10318 if (last_zfill_target_sec == 0
10319 || last_zfill_target_sec != target_sec
10320 || last_zfill_target_offset != old_offset)
10322 bfd_vma new_end_offset = new_offset;
10324 /* Recompute the new_offset, but this time don't
10325 include any fill inserted by relaxation. */
10326 removed_by_old_offset =
10327 removed_by_actions_map (&target_relax_info->action_list,
10329 new_offset = old_offset - removed_by_old_offset;
10331 /* If it is not unreachable and we have not yet
10332 seen an unreachable at this address, place it
10333 before the fill address. */
10334 if (flags_p && (bfd_get_32 (abfd, flags_p)
10335 & XTENSA_PROP_UNREACHABLE) != 0)
10337 new_size = new_end_offset - new_offset;
10339 last_zfill_target_sec = target_sec;
10340 last_zfill_target_offset = old_offset;
10346 int removed_by_old_offset_size =
10347 removed_by_actions_map (&target_relax_info->action_list,
10348 old_offset + old_size, TRUE);
10349 new_size -= removed_by_old_offset_size - removed_by_old_offset;
10352 if (new_size != old_size)
10354 bfd_put_32 (abfd, new_size, size_p);
10355 pin_contents (sec, contents);
10358 if (new_offset != old_offset)
10360 bfd_vma diff = new_offset - old_offset;
10361 irel->r_addend += diff;
10362 pin_internal_relocs (sec, internal_relocs);
10368 /* Combine adjacent property table entries. This is also done in
10369 finish_dynamic_sections() but at that point it's too late to
10370 reclaim the space in the output section, so we do this twice. */
10372 if (internal_relocs && (!bfd_link_relocatable (link_info)
10373 || xtensa_is_littable_section (sec)))
10375 Elf_Internal_Rela *last_irel = NULL;
10376 Elf_Internal_Rela *irel, *next_rel, *rel_end;
10377 int removed_bytes = 0;
10379 flagword predef_flags;
10381 predef_flags = xtensa_get_property_predef_flags (sec);
10383 /* Walk over memory and relocations at the same time.
10384 This REQUIRES that the internal_relocs be sorted by offset. */
10385 qsort (internal_relocs, sec->reloc_count, sizeof (Elf_Internal_Rela),
10386 internal_reloc_compare);
10388 pin_internal_relocs (sec, internal_relocs);
10389 pin_contents (sec, contents);
10391 next_rel = internal_relocs;
10392 rel_end = internal_relocs + sec->reloc_count;
10394 BFD_ASSERT (sec->size % entry_size == 0);
10396 for (offset = 0; offset < sec->size; offset += entry_size)
10398 Elf_Internal_Rela *offset_rel, *extra_rel;
10399 bfd_vma bytes_to_remove, size, actual_offset;
10400 bfd_boolean remove_this_rel;
10403 /* Find the first relocation for the entry at the current offset.
10404 Adjust the offsets of any extra relocations for the previous
10409 for (irel = next_rel; irel < rel_end; irel++)
10411 if ((irel->r_offset == offset
10412 && ELF32_R_TYPE (irel->r_info) != R_XTENSA_NONE)
10413 || irel->r_offset > offset)
10418 irel->r_offset -= removed_bytes;
10422 /* Find the next relocation (if there are any left). */
10426 for (irel = offset_rel + 1; irel < rel_end; irel++)
10428 if (ELF32_R_TYPE (irel->r_info) != R_XTENSA_NONE)
10436 /* Check if there are relocations on the current entry. There
10437 should usually be a relocation on the offset field. If there
10438 are relocations on the size or flags, then we can't optimize
10439 this entry. Also, find the next relocation to examine on the
10443 if (offset_rel->r_offset >= offset + entry_size)
10445 next_rel = offset_rel;
10446 /* There are no relocations on the current entry, but we
10447 might still be able to remove it if the size is zero. */
10450 else if (offset_rel->r_offset > offset
10452 && extra_rel->r_offset < offset + entry_size))
10454 /* There is a relocation on the size or flags, so we can't
10455 do anything with this entry. Continue with the next. */
10456 next_rel = offset_rel;
10461 BFD_ASSERT (offset_rel->r_offset == offset);
10462 offset_rel->r_offset -= removed_bytes;
10463 next_rel = offset_rel + 1;
10469 remove_this_rel = FALSE;
10470 bytes_to_remove = 0;
10471 actual_offset = offset - removed_bytes;
10472 size = bfd_get_32 (abfd, &contents[actual_offset + 4]);
10474 if (is_full_prop_section)
10475 flags = bfd_get_32 (abfd, &contents[actual_offset + 8]);
10477 flags = predef_flags;
10480 && (flags & XTENSA_PROP_ALIGN) == 0
10481 && (flags & XTENSA_PROP_UNREACHABLE) == 0)
10483 /* Always remove entries with zero size and no alignment. */
10484 bytes_to_remove = entry_size;
10486 remove_this_rel = TRUE;
10488 else if (offset_rel
10489 && ELF32_R_TYPE (offset_rel->r_info) == R_XTENSA_32)
10493 flagword old_flags;
10495 bfd_get_32 (abfd, &contents[last_irel->r_offset + 4]);
10496 bfd_vma old_address =
10497 (last_irel->r_addend
10498 + bfd_get_32 (abfd, &contents[last_irel->r_offset]));
10499 bfd_vma new_address =
10500 (offset_rel->r_addend
10501 + bfd_get_32 (abfd, &contents[actual_offset]));
10502 if (is_full_prop_section)
10503 old_flags = bfd_get_32
10504 (abfd, &contents[last_irel->r_offset + 8]);
10506 old_flags = predef_flags;
10508 if ((ELF32_R_SYM (offset_rel->r_info)
10509 == ELF32_R_SYM (last_irel->r_info))
10510 && old_address + old_size == new_address
10511 && old_flags == flags
10512 && (old_flags & XTENSA_PROP_INSN_BRANCH_TARGET) == 0
10513 && (old_flags & XTENSA_PROP_INSN_LOOP_TARGET) == 0)
10515 /* Fix the old size. */
10516 bfd_put_32 (abfd, old_size + size,
10517 &contents[last_irel->r_offset + 4]);
10518 bytes_to_remove = entry_size;
10519 remove_this_rel = TRUE;
10522 last_irel = offset_rel;
10525 last_irel = offset_rel;
10528 if (remove_this_rel)
10530 offset_rel->r_info = ELF32_R_INFO (0, R_XTENSA_NONE);
10531 offset_rel->r_offset = 0;
10534 if (bytes_to_remove != 0)
10536 removed_bytes += bytes_to_remove;
10537 if (offset + bytes_to_remove < sec->size)
10538 memmove (&contents[actual_offset],
10539 &contents[actual_offset + bytes_to_remove],
10540 sec->size - offset - bytes_to_remove);
10546 /* Fix up any extra relocations on the last entry. */
10547 for (irel = next_rel; irel < rel_end; irel++)
10548 irel->r_offset -= removed_bytes;
10550 /* Clear the removed bytes. */
10551 memset (&contents[sec->size - removed_bytes], 0, removed_bytes);
10553 if (sec->rawsize == 0)
10554 sec->rawsize = sec->size;
10555 sec->size -= removed_bytes;
10557 if (xtensa_is_littable_section (sec))
10559 asection *sgotloc = elf_xtensa_hash_table (link_info)->sgotloc;
10561 sgotloc->size -= removed_bytes;
10567 release_internal_relocs (sec, internal_relocs);
10568 release_contents (sec, contents);
10573 /* Third relaxation pass. */
10575 /* Change symbol values to account for removed literals. */
10578 relax_section_symbols (bfd *abfd, asection *sec)
10580 xtensa_relax_info *relax_info;
10581 unsigned int sec_shndx;
10582 Elf_Internal_Shdr *symtab_hdr;
10583 Elf_Internal_Sym *isymbuf;
10584 unsigned i, num_syms, num_locals;
10586 relax_info = get_xtensa_relax_info (sec);
10587 BFD_ASSERT (relax_info);
10589 if (!relax_info->is_relaxable_literal_section
10590 && !relax_info->is_relaxable_asm_section)
10593 sec_shndx = _bfd_elf_section_from_bfd_section (abfd, sec);
10595 symtab_hdr = &elf_tdata (abfd)->symtab_hdr;
10596 isymbuf = retrieve_local_syms (abfd);
10598 num_syms = symtab_hdr->sh_size / sizeof (Elf32_External_Sym);
10599 num_locals = symtab_hdr->sh_info;
10601 /* Adjust the local symbols defined in this section. */
10602 for (i = 0; i < num_locals; i++)
10604 Elf_Internal_Sym *isym = &isymbuf[i];
10606 if (isym->st_shndx == sec_shndx)
10608 bfd_vma orig_addr = isym->st_value;
10609 int removed = removed_by_actions_map (&relax_info->action_list,
10612 isym->st_value -= removed;
10613 if (ELF32_ST_TYPE (isym->st_info) == STT_FUNC)
10615 removed_by_actions_map (&relax_info->action_list,
10616 orig_addr + isym->st_size, FALSE) -
10621 /* Now adjust the global symbols defined in this section. */
10622 for (i = 0; i < (num_syms - num_locals); i++)
10624 struct elf_link_hash_entry *sym_hash;
10626 sym_hash = elf_sym_hashes (abfd)[i];
10628 if (sym_hash->root.type == bfd_link_hash_warning)
10629 sym_hash = (struct elf_link_hash_entry *) sym_hash->root.u.i.link;
10631 if ((sym_hash->root.type == bfd_link_hash_defined
10632 || sym_hash->root.type == bfd_link_hash_defweak)
10633 && sym_hash->root.u.def.section == sec)
10635 bfd_vma orig_addr = sym_hash->root.u.def.value;
10636 int removed = removed_by_actions_map (&relax_info->action_list,
10639 sym_hash->root.u.def.value -= removed;
10641 if (sym_hash->type == STT_FUNC)
10643 removed_by_actions_map (&relax_info->action_list,
10644 orig_addr + sym_hash->size, FALSE) -
10653 /* "Fix" handling functions, called while performing relocations. */
10656 do_fix_for_relocatable_link (Elf_Internal_Rela *rel,
10658 asection *input_section,
10659 bfd_byte *contents)
10662 asection *sec, *old_sec;
10663 bfd_vma old_offset;
10664 int r_type = ELF32_R_TYPE (rel->r_info);
10665 reloc_bfd_fix *fix;
10667 if (r_type == R_XTENSA_NONE)
10670 fix = get_bfd_fix (input_section, rel->r_offset, r_type);
10674 r_reloc_init (&r_rel, input_bfd, rel, contents,
10675 bfd_get_section_limit (input_bfd, input_section));
10676 old_sec = r_reloc_get_section (&r_rel);
10677 old_offset = r_rel.target_offset;
10679 if (!old_sec || !r_reloc_is_defined (&r_rel))
10681 if (r_type != R_XTENSA_ASM_EXPAND)
10684 /* xgettext:c-format */
10685 (_("%pB(%pA+%#" PRIx64 "): unexpected fix for %s relocation"),
10686 input_bfd, input_section, (uint64_t) rel->r_offset,
10687 elf_howto_table[r_type].name);
10690 /* Leave it be. Resolution will happen in a later stage. */
10694 sec = fix->target_sec;
10695 rel->r_addend += ((sec->output_offset + fix->target_offset)
10696 - (old_sec->output_offset + old_offset));
10703 do_fix_for_final_link (Elf_Internal_Rela *rel,
10705 asection *input_section,
10706 bfd_byte *contents,
10707 bfd_vma *relocationp)
10710 int r_type = ELF32_R_TYPE (rel->r_info);
10711 reloc_bfd_fix *fix;
10712 bfd_vma fixup_diff;
10714 if (r_type == R_XTENSA_NONE)
10717 fix = get_bfd_fix (input_section, rel->r_offset, r_type);
10721 sec = fix->target_sec;
10723 fixup_diff = rel->r_addend;
10724 if (elf_howto_table[fix->src_type].partial_inplace)
10726 bfd_vma inplace_val;
10727 BFD_ASSERT (fix->src_offset
10728 < bfd_get_section_limit (input_bfd, input_section));
10729 inplace_val = bfd_get_32 (input_bfd, &contents[fix->src_offset]);
10730 fixup_diff += inplace_val;
10733 *relocationp = (sec->output_section->vma
10734 + sec->output_offset
10735 + fix->target_offset - fixup_diff);
10739 /* Miscellaneous utility functions.... */
10742 elf_xtensa_get_plt_section (struct bfd_link_info *info, int chunk)
10748 return elf_hash_table (info)->splt;
10750 dynobj = elf_hash_table (info)->dynobj;
10751 sprintf (plt_name, ".plt.%u", chunk);
10752 return bfd_get_linker_section (dynobj, plt_name);
10757 elf_xtensa_get_gotplt_section (struct bfd_link_info *info, int chunk)
10763 return elf_hash_table (info)->sgotplt;
10765 dynobj = elf_hash_table (info)->dynobj;
10766 sprintf (got_name, ".got.plt.%u", chunk);
10767 return bfd_get_linker_section (dynobj, got_name);
10771 /* Get the input section for a given symbol index.
10773 . a section symbol, return the section;
10774 . a common symbol, return the common section;
10775 . an undefined symbol, return the undefined section;
10776 . an indirect symbol, follow the links;
10777 . an absolute value, return the absolute section. */
10780 get_elf_r_symndx_section (bfd *abfd, unsigned long r_symndx)
10782 Elf_Internal_Shdr *symtab_hdr = &elf_tdata (abfd)->symtab_hdr;
10783 asection *target_sec = NULL;
10784 if (r_symndx < symtab_hdr->sh_info)
10786 Elf_Internal_Sym *isymbuf;
10787 unsigned int section_index;
10789 isymbuf = retrieve_local_syms (abfd);
10790 section_index = isymbuf[r_symndx].st_shndx;
10792 if (section_index == SHN_UNDEF)
10793 target_sec = bfd_und_section_ptr;
10794 else if (section_index == SHN_ABS)
10795 target_sec = bfd_abs_section_ptr;
10796 else if (section_index == SHN_COMMON)
10797 target_sec = bfd_com_section_ptr;
10799 target_sec = bfd_section_from_elf_index (abfd, section_index);
10803 unsigned long indx = r_symndx - symtab_hdr->sh_info;
10804 struct elf_link_hash_entry *h = elf_sym_hashes (abfd)[indx];
10806 while (h->root.type == bfd_link_hash_indirect
10807 || h->root.type == bfd_link_hash_warning)
10808 h = (struct elf_link_hash_entry *) h->root.u.i.link;
10810 switch (h->root.type)
10812 case bfd_link_hash_defined:
10813 case bfd_link_hash_defweak:
10814 target_sec = h->root.u.def.section;
10816 case bfd_link_hash_common:
10817 target_sec = bfd_com_section_ptr;
10819 case bfd_link_hash_undefined:
10820 case bfd_link_hash_undefweak:
10821 target_sec = bfd_und_section_ptr;
10823 default: /* New indirect warning. */
10824 target_sec = bfd_und_section_ptr;
10832 static struct elf_link_hash_entry *
10833 get_elf_r_symndx_hash_entry (bfd *abfd, unsigned long r_symndx)
10835 unsigned long indx;
10836 struct elf_link_hash_entry *h;
10837 Elf_Internal_Shdr *symtab_hdr = &elf_tdata (abfd)->symtab_hdr;
10839 if (r_symndx < symtab_hdr->sh_info)
10842 indx = r_symndx - symtab_hdr->sh_info;
10843 h = elf_sym_hashes (abfd)[indx];
10844 while (h->root.type == bfd_link_hash_indirect
10845 || h->root.type == bfd_link_hash_warning)
10846 h = (struct elf_link_hash_entry *) h->root.u.i.link;
10851 /* Get the section-relative offset for a symbol number. */
10854 get_elf_r_symndx_offset (bfd *abfd, unsigned long r_symndx)
10856 Elf_Internal_Shdr *symtab_hdr = &elf_tdata (abfd)->symtab_hdr;
10857 bfd_vma offset = 0;
10859 if (r_symndx < symtab_hdr->sh_info)
10861 Elf_Internal_Sym *isymbuf;
10862 isymbuf = retrieve_local_syms (abfd);
10863 offset = isymbuf[r_symndx].st_value;
10867 unsigned long indx = r_symndx - symtab_hdr->sh_info;
10868 struct elf_link_hash_entry *h =
10869 elf_sym_hashes (abfd)[indx];
10871 while (h->root.type == bfd_link_hash_indirect
10872 || h->root.type == bfd_link_hash_warning)
10873 h = (struct elf_link_hash_entry *) h->root.u.i.link;
10874 if (h->root.type == bfd_link_hash_defined
10875 || h->root.type == bfd_link_hash_defweak)
10876 offset = h->root.u.def.value;
10883 is_reloc_sym_weak (bfd *abfd, Elf_Internal_Rela *rel)
10885 unsigned long r_symndx = ELF32_R_SYM (rel->r_info);
10886 struct elf_link_hash_entry *h;
10888 h = get_elf_r_symndx_hash_entry (abfd, r_symndx);
10889 if (h && h->root.type == bfd_link_hash_defweak)
10896 pcrel_reloc_fits (xtensa_opcode opc,
10898 bfd_vma self_address,
10899 bfd_vma dest_address)
10901 xtensa_isa isa = xtensa_default_isa;
10902 uint32 valp = dest_address;
10903 if (xtensa_operand_do_reloc (isa, opc, opnd, &valp, self_address)
10904 || xtensa_operand_encode (isa, opc, opnd, &valp))
10911 xtensa_is_property_section (asection *sec)
10913 if (xtensa_is_insntable_section (sec)
10914 || xtensa_is_littable_section (sec)
10915 || xtensa_is_proptable_section (sec))
10923 xtensa_is_insntable_section (asection *sec)
10925 if (CONST_STRNEQ (sec->name, XTENSA_INSN_SEC_NAME)
10926 || CONST_STRNEQ (sec->name, ".gnu.linkonce.x."))
10934 xtensa_is_littable_section (asection *sec)
10936 if (CONST_STRNEQ (sec->name, XTENSA_LIT_SEC_NAME)
10937 || CONST_STRNEQ (sec->name, ".gnu.linkonce.p."))
10945 xtensa_is_proptable_section (asection *sec)
10947 if (CONST_STRNEQ (sec->name, XTENSA_PROP_SEC_NAME)
10948 || CONST_STRNEQ (sec->name, ".gnu.linkonce.prop."))
10956 internal_reloc_compare (const void *ap, const void *bp)
10958 const Elf_Internal_Rela *a = (const Elf_Internal_Rela *) ap;
10959 const Elf_Internal_Rela *b = (const Elf_Internal_Rela *) bp;
10961 if (a->r_offset != b->r_offset)
10962 return (a->r_offset - b->r_offset);
10964 /* We don't need to sort on these criteria for correctness,
10965 but enforcing a more strict ordering prevents unstable qsort
10966 from behaving differently with different implementations.
10967 Without the code below we get correct but different results
10968 on Solaris 2.7 and 2.8. We would like to always produce the
10969 same results no matter the host. */
10971 if (a->r_info != b->r_info)
10972 return (a->r_info - b->r_info);
10974 return (a->r_addend - b->r_addend);
10979 internal_reloc_matches (const void *ap, const void *bp)
10981 const Elf_Internal_Rela *a = (const Elf_Internal_Rela *) ap;
10982 const Elf_Internal_Rela *b = (const Elf_Internal_Rela *) bp;
10984 /* Check if one entry overlaps with the other; this shouldn't happen
10985 except when searching for a match. */
10986 return (a->r_offset - b->r_offset);
10990 /* Predicate function used to look up a section in a particular group. */
10993 match_section_group (bfd *abfd ATTRIBUTE_UNUSED, asection *sec, void *inf)
10995 const char *gname = inf;
10996 const char *group_name = elf_group_name (sec);
10998 return (group_name == gname
10999 || (group_name != NULL
11001 && strcmp (group_name, gname) == 0));
11006 xtensa_add_names (const char *base, const char *suffix)
11010 size_t base_len = strlen (base);
11011 size_t suffix_len = strlen (suffix);
11012 char *str = bfd_malloc (base_len + suffix_len + 1);
11014 memcpy (str, base, base_len);
11015 memcpy (str + base_len, suffix, suffix_len + 1);
11020 return strdup (base);
11024 static int linkonce_len = sizeof (".gnu.linkonce.") - 1;
11027 xtensa_property_section_name (asection *sec, const char *base_name,
11028 bfd_boolean separate_sections)
11030 const char *suffix, *group_name;
11031 char *prop_sec_name;
11033 group_name = elf_group_name (sec);
11036 suffix = strrchr (sec->name, '.');
11037 if (suffix == sec->name)
11039 prop_sec_name = xtensa_add_names (base_name, suffix);
11041 else if (strncmp (sec->name, ".gnu.linkonce.", linkonce_len) == 0)
11043 char *linkonce_kind = 0;
11045 if (strcmp (base_name, XTENSA_INSN_SEC_NAME) == 0)
11046 linkonce_kind = "x.";
11047 else if (strcmp (base_name, XTENSA_LIT_SEC_NAME) == 0)
11048 linkonce_kind = "p.";
11049 else if (strcmp (base_name, XTENSA_PROP_SEC_NAME) == 0)
11050 linkonce_kind = "prop.";
11054 prop_sec_name = (char *) bfd_malloc (strlen (sec->name)
11055 + strlen (linkonce_kind) + 1);
11056 memcpy (prop_sec_name, ".gnu.linkonce.", linkonce_len);
11057 strcpy (prop_sec_name + linkonce_len, linkonce_kind);
11059 suffix = sec->name + linkonce_len;
11060 /* For backward compatibility, replace "t." instead of inserting
11061 the new linkonce_kind (but not for "prop" sections). */
11062 if (CONST_STRNEQ (suffix, "t.") && linkonce_kind[1] == '.')
11064 strcat (prop_sec_name + linkonce_len, suffix);
11068 prop_sec_name = xtensa_add_names (base_name,
11069 separate_sections ? sec->name : NULL);
11072 return prop_sec_name;
11077 xtensa_get_separate_property_section (asection *sec, const char *base_name,
11078 bfd_boolean separate_section)
11080 char *prop_sec_name;
11081 asection *prop_sec;
11083 prop_sec_name = xtensa_property_section_name (sec, base_name,
11085 prop_sec = bfd_get_section_by_name_if (sec->owner, prop_sec_name,
11086 match_section_group,
11087 (void *) elf_group_name (sec));
11088 free (prop_sec_name);
11093 xtensa_get_property_section (asection *sec, const char *base_name)
11095 asection *prop_sec;
11097 /* Try individual property section first. */
11098 prop_sec = xtensa_get_separate_property_section (sec, base_name, TRUE);
11100 /* Refer to a common property section if individual is not present. */
11102 prop_sec = xtensa_get_separate_property_section (sec, base_name, FALSE);
11109 xtensa_make_property_section (asection *sec, const char *base_name)
11111 char *prop_sec_name;
11112 asection *prop_sec;
11114 /* Check if the section already exists. */
11115 prop_sec_name = xtensa_property_section_name (sec, base_name,
11116 elf32xtensa_separate_props);
11117 prop_sec = bfd_get_section_by_name_if (sec->owner, prop_sec_name,
11118 match_section_group,
11119 (void *) elf_group_name (sec));
11120 /* If not, create it. */
11123 flagword flags = (SEC_RELOC | SEC_HAS_CONTENTS | SEC_READONLY);
11124 flags |= (bfd_get_section_flags (sec->owner, sec)
11125 & (SEC_LINK_ONCE | SEC_LINK_DUPLICATES));
11127 prop_sec = bfd_make_section_anyway_with_flags
11128 (sec->owner, strdup (prop_sec_name), flags);
11132 elf_group_name (prop_sec) = elf_group_name (sec);
11135 free (prop_sec_name);
11141 xtensa_get_property_predef_flags (asection *sec)
11143 if (xtensa_is_insntable_section (sec))
11144 return (XTENSA_PROP_INSN
11145 | XTENSA_PROP_NO_TRANSFORM
11146 | XTENSA_PROP_INSN_NO_REORDER);
11148 if (xtensa_is_littable_section (sec))
11149 return (XTENSA_PROP_LITERAL
11150 | XTENSA_PROP_NO_TRANSFORM
11151 | XTENSA_PROP_INSN_NO_REORDER);
11157 /* Other functions called directly by the linker. */
11160 xtensa_callback_required_dependence (bfd *abfd,
11162 struct bfd_link_info *link_info,
11163 deps_callback_t callback,
11166 Elf_Internal_Rela *internal_relocs;
11167 bfd_byte *contents;
11169 bfd_boolean ok = TRUE;
11170 bfd_size_type sec_size;
11172 sec_size = bfd_get_section_limit (abfd, sec);
11174 /* ".plt*" sections have no explicit relocations but they contain L32R
11175 instructions that reference the corresponding ".got.plt*" sections. */
11176 if ((sec->flags & SEC_LINKER_CREATED) != 0
11177 && CONST_STRNEQ (sec->name, ".plt"))
11181 /* Find the corresponding ".got.plt*" section. */
11182 if (sec->name[4] == '\0')
11183 sgotplt = elf_hash_table (link_info)->sgotplt;
11189 BFD_ASSERT (sec->name[4] == '.');
11190 chunk = strtol (&sec->name[5], NULL, 10);
11192 sprintf (got_name, ".got.plt.%u", chunk);
11193 sgotplt = bfd_get_linker_section (sec->owner, got_name);
11195 BFD_ASSERT (sgotplt);
11197 /* Assume worst-case offsets: L32R at the very end of the ".plt"
11198 section referencing a literal at the very beginning of
11199 ".got.plt". This is very close to the real dependence, anyway. */
11200 (*callback) (sec, sec_size, sgotplt, 0, closure);
11203 /* Only ELF files are supported for Xtensa. Check here to avoid a segfault
11204 when building uclibc, which runs "ld -b binary /dev/null". */
11205 if (bfd_get_flavour (abfd) != bfd_target_elf_flavour)
11208 internal_relocs = retrieve_internal_relocs (abfd, sec,
11209 link_info->keep_memory);
11210 if (internal_relocs == NULL
11211 || sec->reloc_count == 0)
11214 /* Cache the contents for the duration of this scan. */
11215 contents = retrieve_contents (abfd, sec, link_info->keep_memory);
11216 if (contents == NULL && sec_size != 0)
11222 if (!xtensa_default_isa)
11223 xtensa_default_isa = xtensa_isa_init (0, 0);
11225 for (i = 0; i < sec->reloc_count; i++)
11227 Elf_Internal_Rela *irel = &internal_relocs[i];
11228 if (is_l32r_relocation (abfd, sec, contents, irel))
11231 asection *target_sec;
11232 bfd_vma target_offset;
11234 r_reloc_init (&l32r_rel, abfd, irel, contents, sec_size);
11237 /* L32Rs must be local to the input file. */
11238 if (r_reloc_is_defined (&l32r_rel))
11240 target_sec = r_reloc_get_section (&l32r_rel);
11241 target_offset = l32r_rel.target_offset;
11243 (*callback) (sec, irel->r_offset, target_sec, target_offset,
11249 release_internal_relocs (sec, internal_relocs);
11250 release_contents (sec, contents);
11254 /* The default literal sections should always be marked as "code" (i.e.,
11255 SHF_EXECINSTR). This is particularly important for the Linux kernel
11256 module loader so that the literals are not placed after the text. */
11257 static const struct bfd_elf_special_section elf_xtensa_special_sections[] =
11259 { STRING_COMMA_LEN (".fini.literal"), 0, SHT_PROGBITS, SHF_ALLOC + SHF_EXECINSTR },
11260 { STRING_COMMA_LEN (".init.literal"), 0, SHT_PROGBITS, SHF_ALLOC + SHF_EXECINSTR },
11261 { STRING_COMMA_LEN (".literal"), 0, SHT_PROGBITS, SHF_ALLOC + SHF_EXECINSTR },
11262 { STRING_COMMA_LEN (".xtensa.info"), 0, SHT_NOTE, 0 },
11263 { NULL, 0, 0, 0, 0 }
11266 #define ELF_TARGET_ID XTENSA_ELF_DATA
11268 #define TARGET_LITTLE_SYM xtensa_elf32_le_vec
11269 #define TARGET_LITTLE_NAME "elf32-xtensa-le"
11270 #define TARGET_BIG_SYM xtensa_elf32_be_vec
11271 #define TARGET_BIG_NAME "elf32-xtensa-be"
11272 #define ELF_ARCH bfd_arch_xtensa
11274 #define ELF_MACHINE_CODE EM_XTENSA
11275 #define ELF_MACHINE_ALT1 EM_XTENSA_OLD
11277 #define ELF_MAXPAGESIZE 0x1000
11278 #endif /* ELF_ARCH */
11280 #define elf_backend_can_gc_sections 1
11281 #define elf_backend_can_refcount 1
11282 #define elf_backend_plt_readonly 1
11283 #define elf_backend_got_header_size 4
11284 #define elf_backend_want_dynbss 0
11285 #define elf_backend_want_got_plt 1
11286 #define elf_backend_dtrel_excludes_plt 1
11288 #define elf_info_to_howto elf_xtensa_info_to_howto_rela
11290 #define bfd_elf32_mkobject elf_xtensa_mkobject
11292 #define bfd_elf32_bfd_merge_private_bfd_data elf_xtensa_merge_private_bfd_data
11293 #define bfd_elf32_new_section_hook elf_xtensa_new_section_hook
11294 #define bfd_elf32_bfd_print_private_bfd_data elf_xtensa_print_private_bfd_data
11295 #define bfd_elf32_bfd_relax_section elf_xtensa_relax_section
11296 #define bfd_elf32_bfd_reloc_type_lookup elf_xtensa_reloc_type_lookup
11297 #define bfd_elf32_bfd_reloc_name_lookup \
11298 elf_xtensa_reloc_name_lookup
11299 #define bfd_elf32_bfd_set_private_flags elf_xtensa_set_private_flags
11300 #define bfd_elf32_bfd_link_hash_table_create elf_xtensa_link_hash_table_create
11302 #define elf_backend_adjust_dynamic_symbol elf_xtensa_adjust_dynamic_symbol
11303 #define elf_backend_check_relocs elf_xtensa_check_relocs
11304 #define elf_backend_create_dynamic_sections elf_xtensa_create_dynamic_sections
11305 #define elf_backend_discard_info elf_xtensa_discard_info
11306 #define elf_backend_ignore_discarded_relocs elf_xtensa_ignore_discarded_relocs
11307 #define elf_backend_final_write_processing elf_xtensa_final_write_processing
11308 #define elf_backend_finish_dynamic_sections elf_xtensa_finish_dynamic_sections
11309 #define elf_backend_finish_dynamic_symbol elf_xtensa_finish_dynamic_symbol
11310 #define elf_backend_gc_mark_hook elf_xtensa_gc_mark_hook
11311 #define elf_backend_grok_prstatus elf_xtensa_grok_prstatus
11312 #define elf_backend_grok_psinfo elf_xtensa_grok_psinfo
11313 #define elf_backend_hide_symbol elf_xtensa_hide_symbol
11314 #define elf_backend_object_p elf_xtensa_object_p
11315 #define elf_backend_reloc_type_class elf_xtensa_reloc_type_class
11316 #define elf_backend_relocate_section elf_xtensa_relocate_section
11317 #define elf_backend_size_dynamic_sections elf_xtensa_size_dynamic_sections
11318 #define elf_backend_always_size_sections elf_xtensa_always_size_sections
11319 #define elf_backend_omit_section_dynsym _bfd_elf_omit_section_dynsym_all
11320 #define elf_backend_special_sections elf_xtensa_special_sections
11321 #define elf_backend_action_discarded elf_xtensa_action_discarded
11322 #define elf_backend_copy_indirect_symbol elf_xtensa_copy_indirect_symbol
11324 #include "elf32-target.h"