1 /* Motorola 68k series support for 32-bit ELF
2 Copyright 1993, 1995, 1996, 1997, 1998, 1999, 2000, 2001, 2002, 2003,
3 2004, 2005, 2006, 2007, 2008, 2009 Free Software Foundation, Inc.
5 This file is part of BFD, the Binary File Descriptor library.
7 This program is free software; you can redistribute it and/or modify
8 it under the terms of the GNU General Public License as published by
9 the Free Software Foundation; either version 3 of the License, or
10 (at your option) any later version.
12 This program is distributed in the hope that it will be useful,
13 but WITHOUT ANY WARRANTY; without even the implied warranty of
14 MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
15 GNU General Public License for more details.
17 You should have received a copy of the GNU General Public License
18 along with this program; if not, write to the Free Software
19 Foundation, Inc., 51 Franklin Street - Fifth Floor, Boston,
20 MA 02110-1301, USA. */
28 #include "opcode/m68k.h"
30 static reloc_howto_type *reloc_type_lookup
31 PARAMS ((bfd *, bfd_reloc_code_real_type));
32 static void rtype_to_howto
33 PARAMS ((bfd *, arelent *, Elf_Internal_Rela *));
34 static struct bfd_hash_entry *elf_m68k_link_hash_newfunc
35 PARAMS ((struct bfd_hash_entry *, struct bfd_hash_table *, const char *));
36 static struct bfd_link_hash_table *elf_m68k_link_hash_table_create
38 static bfd_boolean elf_m68k_check_relocs
39 PARAMS ((bfd *, struct bfd_link_info *, asection *,
40 const Elf_Internal_Rela *));
41 static bfd_boolean elf_m68k_adjust_dynamic_symbol
42 PARAMS ((struct bfd_link_info *, struct elf_link_hash_entry *));
43 static bfd_boolean elf_m68k_size_dynamic_sections
44 PARAMS ((bfd *, struct bfd_link_info *));
45 static bfd_boolean elf_m68k_discard_copies
46 PARAMS ((struct elf_link_hash_entry *, PTR));
47 static bfd_boolean elf_m68k_relocate_section
48 PARAMS ((bfd *, struct bfd_link_info *, bfd *, asection *, bfd_byte *,
49 Elf_Internal_Rela *, Elf_Internal_Sym *, asection **));
50 static bfd_boolean elf_m68k_finish_dynamic_symbol
51 PARAMS ((bfd *, struct bfd_link_info *, struct elf_link_hash_entry *,
53 static bfd_boolean elf_m68k_finish_dynamic_sections
54 PARAMS ((bfd *, struct bfd_link_info *));
56 static bfd_boolean elf32_m68k_set_private_flags
57 PARAMS ((bfd *, flagword));
58 static bfd_boolean elf32_m68k_merge_private_bfd_data
59 PARAMS ((bfd *, bfd *));
60 static bfd_boolean elf32_m68k_print_private_bfd_data
61 PARAMS ((bfd *, PTR));
62 static enum elf_reloc_type_class elf32_m68k_reloc_type_class
63 PARAMS ((const Elf_Internal_Rela *));
65 static reloc_howto_type howto_table[] = {
66 HOWTO(R_68K_NONE, 0, 0, 0, FALSE,0, complain_overflow_dont, bfd_elf_generic_reloc, "R_68K_NONE", FALSE, 0, 0x00000000,FALSE),
67 HOWTO(R_68K_32, 0, 2,32, FALSE,0, complain_overflow_bitfield, bfd_elf_generic_reloc, "R_68K_32", FALSE, 0, 0xffffffff,FALSE),
68 HOWTO(R_68K_16, 0, 1,16, FALSE,0, complain_overflow_bitfield, bfd_elf_generic_reloc, "R_68K_16", FALSE, 0, 0x0000ffff,FALSE),
69 HOWTO(R_68K_8, 0, 0, 8, FALSE,0, complain_overflow_bitfield, bfd_elf_generic_reloc, "R_68K_8", FALSE, 0, 0x000000ff,FALSE),
70 HOWTO(R_68K_PC32, 0, 2,32, TRUE, 0, complain_overflow_bitfield, bfd_elf_generic_reloc, "R_68K_PC32", FALSE, 0, 0xffffffff,TRUE),
71 HOWTO(R_68K_PC16, 0, 1,16, TRUE, 0, complain_overflow_signed, bfd_elf_generic_reloc, "R_68K_PC16", FALSE, 0, 0x0000ffff,TRUE),
72 HOWTO(R_68K_PC8, 0, 0, 8, TRUE, 0, complain_overflow_signed, bfd_elf_generic_reloc, "R_68K_PC8", FALSE, 0, 0x000000ff,TRUE),
73 HOWTO(R_68K_GOT32, 0, 2,32, TRUE, 0, complain_overflow_bitfield, bfd_elf_generic_reloc, "R_68K_GOT32", FALSE, 0, 0xffffffff,TRUE),
74 HOWTO(R_68K_GOT16, 0, 1,16, TRUE, 0, complain_overflow_signed, bfd_elf_generic_reloc, "R_68K_GOT16", FALSE, 0, 0x0000ffff,TRUE),
75 HOWTO(R_68K_GOT8, 0, 0, 8, TRUE, 0, complain_overflow_signed, bfd_elf_generic_reloc, "R_68K_GOT8", FALSE, 0, 0x000000ff,TRUE),
76 HOWTO(R_68K_GOT32O, 0, 2,32, FALSE,0, complain_overflow_bitfield, bfd_elf_generic_reloc, "R_68K_GOT32O", FALSE, 0, 0xffffffff,FALSE),
77 HOWTO(R_68K_GOT16O, 0, 1,16, FALSE,0, complain_overflow_signed, bfd_elf_generic_reloc, "R_68K_GOT16O", FALSE, 0, 0x0000ffff,FALSE),
78 HOWTO(R_68K_GOT8O, 0, 0, 8, FALSE,0, complain_overflow_signed, bfd_elf_generic_reloc, "R_68K_GOT8O", FALSE, 0, 0x000000ff,FALSE),
79 HOWTO(R_68K_PLT32, 0, 2,32, TRUE, 0, complain_overflow_bitfield, bfd_elf_generic_reloc, "R_68K_PLT32", FALSE, 0, 0xffffffff,TRUE),
80 HOWTO(R_68K_PLT16, 0, 1,16, TRUE, 0, complain_overflow_signed, bfd_elf_generic_reloc, "R_68K_PLT16", FALSE, 0, 0x0000ffff,TRUE),
81 HOWTO(R_68K_PLT8, 0, 0, 8, TRUE, 0, complain_overflow_signed, bfd_elf_generic_reloc, "R_68K_PLT8", FALSE, 0, 0x000000ff,TRUE),
82 HOWTO(R_68K_PLT32O, 0, 2,32, FALSE,0, complain_overflow_bitfield, bfd_elf_generic_reloc, "R_68K_PLT32O", FALSE, 0, 0xffffffff,FALSE),
83 HOWTO(R_68K_PLT16O, 0, 1,16, FALSE,0, complain_overflow_signed, bfd_elf_generic_reloc, "R_68K_PLT16O", FALSE, 0, 0x0000ffff,FALSE),
84 HOWTO(R_68K_PLT8O, 0, 0, 8, FALSE,0, complain_overflow_signed, bfd_elf_generic_reloc, "R_68K_PLT8O", FALSE, 0, 0x000000ff,FALSE),
85 HOWTO(R_68K_COPY, 0, 0, 0, FALSE,0, complain_overflow_dont, bfd_elf_generic_reloc, "R_68K_COPY", FALSE, 0, 0xffffffff,FALSE),
86 HOWTO(R_68K_GLOB_DAT, 0, 2,32, FALSE,0, complain_overflow_dont, bfd_elf_generic_reloc, "R_68K_GLOB_DAT", FALSE, 0, 0xffffffff,FALSE),
87 HOWTO(R_68K_JMP_SLOT, 0, 2,32, FALSE,0, complain_overflow_dont, bfd_elf_generic_reloc, "R_68K_JMP_SLOT", FALSE, 0, 0xffffffff,FALSE),
88 HOWTO(R_68K_RELATIVE, 0, 2,32, FALSE,0, complain_overflow_dont, bfd_elf_generic_reloc, "R_68K_RELATIVE", FALSE, 0, 0xffffffff,FALSE),
89 /* GNU extension to record C++ vtable hierarchy. */
90 HOWTO (R_68K_GNU_VTINHERIT, /* type */
92 2, /* size (0 = byte, 1 = short, 2 = long) */
94 FALSE, /* pc_relative */
96 complain_overflow_dont, /* complain_on_overflow */
97 NULL, /* special_function */
98 "R_68K_GNU_VTINHERIT", /* name */
99 FALSE, /* partial_inplace */
103 /* GNU extension to record C++ vtable member usage. */
104 HOWTO (R_68K_GNU_VTENTRY, /* type */
106 2, /* size (0 = byte, 1 = short, 2 = long) */
108 FALSE, /* pc_relative */
110 complain_overflow_dont, /* complain_on_overflow */
111 _bfd_elf_rel_vtable_reloc_fn, /* special_function */
112 "R_68K_GNU_VTENTRY", /* name */
113 FALSE, /* partial_inplace */
118 /* TLS general dynamic variable reference. */
119 HOWTO (R_68K_TLS_GD32, /* type */
121 2, /* size (0 = byte, 1 = short, 2 = long) */
123 FALSE, /* pc_relative */
125 complain_overflow_bitfield, /* complain_on_overflow */
126 bfd_elf_generic_reloc, /* special_function */
127 "R_68K_TLS_GD32", /* name */
128 FALSE, /* partial_inplace */
130 0xffffffff, /* dst_mask */
131 FALSE), /* pcrel_offset */
133 HOWTO (R_68K_TLS_GD16, /* type */
135 1, /* size (0 = byte, 1 = short, 2 = long) */
137 FALSE, /* pc_relative */
139 complain_overflow_signed, /* complain_on_overflow */
140 bfd_elf_generic_reloc, /* special_function */
141 "R_68K_TLS_GD16", /* name */
142 FALSE, /* partial_inplace */
144 0x0000ffff, /* dst_mask */
145 FALSE), /* pcrel_offset */
147 HOWTO (R_68K_TLS_GD8, /* type */
149 0, /* size (0 = byte, 1 = short, 2 = long) */
151 FALSE, /* pc_relative */
153 complain_overflow_signed, /* complain_on_overflow */
154 bfd_elf_generic_reloc, /* special_function */
155 "R_68K_TLS_GD8", /* name */
156 FALSE, /* partial_inplace */
158 0x000000ff, /* dst_mask */
159 FALSE), /* pcrel_offset */
161 /* TLS local dynamic variable reference. */
162 HOWTO (R_68K_TLS_LDM32, /* type */
164 2, /* size (0 = byte, 1 = short, 2 = long) */
166 FALSE, /* pc_relative */
168 complain_overflow_bitfield, /* complain_on_overflow */
169 bfd_elf_generic_reloc, /* special_function */
170 "R_68K_TLS_LDM32", /* name */
171 FALSE, /* partial_inplace */
173 0xffffffff, /* dst_mask */
174 FALSE), /* pcrel_offset */
176 HOWTO (R_68K_TLS_LDM16, /* type */
178 1, /* size (0 = byte, 1 = short, 2 = long) */
180 FALSE, /* pc_relative */
182 complain_overflow_signed, /* complain_on_overflow */
183 bfd_elf_generic_reloc, /* special_function */
184 "R_68K_TLS_LDM16", /* name */
185 FALSE, /* partial_inplace */
187 0x0000ffff, /* dst_mask */
188 FALSE), /* pcrel_offset */
190 HOWTO (R_68K_TLS_LDM8, /* type */
192 0, /* size (0 = byte, 1 = short, 2 = long) */
194 FALSE, /* pc_relative */
196 complain_overflow_signed, /* complain_on_overflow */
197 bfd_elf_generic_reloc, /* special_function */
198 "R_68K_TLS_LDM8", /* name */
199 FALSE, /* partial_inplace */
201 0x000000ff, /* dst_mask */
202 FALSE), /* pcrel_offset */
204 HOWTO (R_68K_TLS_LDO32, /* type */
206 2, /* size (0 = byte, 1 = short, 2 = long) */
208 FALSE, /* pc_relative */
210 complain_overflow_bitfield, /* complain_on_overflow */
211 bfd_elf_generic_reloc, /* special_function */
212 "R_68K_TLS_LDO32", /* name */
213 FALSE, /* partial_inplace */
215 0xffffffff, /* dst_mask */
216 FALSE), /* pcrel_offset */
218 HOWTO (R_68K_TLS_LDO16, /* type */
220 1, /* size (0 = byte, 1 = short, 2 = long) */
222 FALSE, /* pc_relative */
224 complain_overflow_signed, /* complain_on_overflow */
225 bfd_elf_generic_reloc, /* special_function */
226 "R_68K_TLS_LDO16", /* name */
227 FALSE, /* partial_inplace */
229 0x0000ffff, /* dst_mask */
230 FALSE), /* pcrel_offset */
232 HOWTO (R_68K_TLS_LDO8, /* type */
234 0, /* size (0 = byte, 1 = short, 2 = long) */
236 FALSE, /* pc_relative */
238 complain_overflow_signed, /* complain_on_overflow */
239 bfd_elf_generic_reloc, /* special_function */
240 "R_68K_TLS_LDO8", /* name */
241 FALSE, /* partial_inplace */
243 0x000000ff, /* dst_mask */
244 FALSE), /* pcrel_offset */
246 /* TLS initial execution variable reference. */
247 HOWTO (R_68K_TLS_IE32, /* type */
249 2, /* size (0 = byte, 1 = short, 2 = long) */
251 FALSE, /* pc_relative */
253 complain_overflow_bitfield, /* complain_on_overflow */
254 bfd_elf_generic_reloc, /* special_function */
255 "R_68K_TLS_IE32", /* name */
256 FALSE, /* partial_inplace */
258 0xffffffff, /* dst_mask */
259 FALSE), /* pcrel_offset */
261 HOWTO (R_68K_TLS_IE16, /* type */
263 1, /* size (0 = byte, 1 = short, 2 = long) */
265 FALSE, /* pc_relative */
267 complain_overflow_signed, /* complain_on_overflow */
268 bfd_elf_generic_reloc, /* special_function */
269 "R_68K_TLS_IE16", /* name */
270 FALSE, /* partial_inplace */
272 0x0000ffff, /* dst_mask */
273 FALSE), /* pcrel_offset */
275 HOWTO (R_68K_TLS_IE8, /* type */
277 0, /* size (0 = byte, 1 = short, 2 = long) */
279 FALSE, /* pc_relative */
281 complain_overflow_signed, /* complain_on_overflow */
282 bfd_elf_generic_reloc, /* special_function */
283 "R_68K_TLS_IE8", /* name */
284 FALSE, /* partial_inplace */
286 0x000000ff, /* dst_mask */
287 FALSE), /* pcrel_offset */
289 /* TLS local execution variable reference. */
290 HOWTO (R_68K_TLS_LE32, /* type */
292 2, /* size (0 = byte, 1 = short, 2 = long) */
294 FALSE, /* pc_relative */
296 complain_overflow_bitfield, /* complain_on_overflow */
297 bfd_elf_generic_reloc, /* special_function */
298 "R_68K_TLS_LE32", /* name */
299 FALSE, /* partial_inplace */
301 0xffffffff, /* dst_mask */
302 FALSE), /* pcrel_offset */
304 HOWTO (R_68K_TLS_LE16, /* type */
306 1, /* size (0 = byte, 1 = short, 2 = long) */
308 FALSE, /* pc_relative */
310 complain_overflow_signed, /* complain_on_overflow */
311 bfd_elf_generic_reloc, /* special_function */
312 "R_68K_TLS_LE16", /* name */
313 FALSE, /* partial_inplace */
315 0x0000ffff, /* dst_mask */
316 FALSE), /* pcrel_offset */
318 HOWTO (R_68K_TLS_LE8, /* type */
320 0, /* size (0 = byte, 1 = short, 2 = long) */
322 FALSE, /* pc_relative */
324 complain_overflow_signed, /* complain_on_overflow */
325 bfd_elf_generic_reloc, /* special_function */
326 "R_68K_TLS_LE8", /* name */
327 FALSE, /* partial_inplace */
329 0x000000ff, /* dst_mask */
330 FALSE), /* pcrel_offset */
332 /* TLS GD/LD dynamic relocations. */
333 HOWTO (R_68K_TLS_DTPMOD32, /* type */
335 2, /* size (0 = byte, 1 = short, 2 = long) */
337 FALSE, /* pc_relative */
339 complain_overflow_dont, /* complain_on_overflow */
340 bfd_elf_generic_reloc, /* special_function */
341 "R_68K_TLS_DTPMOD32", /* name */
342 FALSE, /* partial_inplace */
344 0xffffffff, /* dst_mask */
345 FALSE), /* pcrel_offset */
347 HOWTO (R_68K_TLS_DTPREL32, /* type */
349 2, /* size (0 = byte, 1 = short, 2 = long) */
351 FALSE, /* pc_relative */
353 complain_overflow_dont, /* complain_on_overflow */
354 bfd_elf_generic_reloc, /* special_function */
355 "R_68K_TLS_DTPREL32", /* name */
356 FALSE, /* partial_inplace */
358 0xffffffff, /* dst_mask */
359 FALSE), /* pcrel_offset */
361 HOWTO (R_68K_TLS_TPREL32, /* type */
363 2, /* size (0 = byte, 1 = short, 2 = long) */
365 FALSE, /* pc_relative */
367 complain_overflow_dont, /* complain_on_overflow */
368 bfd_elf_generic_reloc, /* special_function */
369 "R_68K_TLS_TPREL32", /* name */
370 FALSE, /* partial_inplace */
372 0xffffffff, /* dst_mask */
373 FALSE), /* pcrel_offset */
377 rtype_to_howto (bfd *abfd, arelent *cache_ptr, Elf_Internal_Rela *dst)
379 unsigned int indx = ELF32_R_TYPE (dst->r_info);
381 if (indx >= (unsigned int) R_68K_max)
383 (*_bfd_error_handler) (_("%B: invalid relocation type %d"),
387 cache_ptr->howto = &howto_table[indx];
390 #define elf_info_to_howto rtype_to_howto
394 bfd_reloc_code_real_type bfd_val;
399 { BFD_RELOC_NONE, R_68K_NONE },
400 { BFD_RELOC_32, R_68K_32 },
401 { BFD_RELOC_16, R_68K_16 },
402 { BFD_RELOC_8, R_68K_8 },
403 { BFD_RELOC_32_PCREL, R_68K_PC32 },
404 { BFD_RELOC_16_PCREL, R_68K_PC16 },
405 { BFD_RELOC_8_PCREL, R_68K_PC8 },
406 { BFD_RELOC_32_GOT_PCREL, R_68K_GOT32 },
407 { BFD_RELOC_16_GOT_PCREL, R_68K_GOT16 },
408 { BFD_RELOC_8_GOT_PCREL, R_68K_GOT8 },
409 { BFD_RELOC_32_GOTOFF, R_68K_GOT32O },
410 { BFD_RELOC_16_GOTOFF, R_68K_GOT16O },
411 { BFD_RELOC_8_GOTOFF, R_68K_GOT8O },
412 { BFD_RELOC_32_PLT_PCREL, R_68K_PLT32 },
413 { BFD_RELOC_16_PLT_PCREL, R_68K_PLT16 },
414 { BFD_RELOC_8_PLT_PCREL, R_68K_PLT8 },
415 { BFD_RELOC_32_PLTOFF, R_68K_PLT32O },
416 { BFD_RELOC_16_PLTOFF, R_68K_PLT16O },
417 { BFD_RELOC_8_PLTOFF, R_68K_PLT8O },
418 { BFD_RELOC_NONE, R_68K_COPY },
419 { BFD_RELOC_68K_GLOB_DAT, R_68K_GLOB_DAT },
420 { BFD_RELOC_68K_JMP_SLOT, R_68K_JMP_SLOT },
421 { BFD_RELOC_68K_RELATIVE, R_68K_RELATIVE },
422 { BFD_RELOC_CTOR, R_68K_32 },
423 { BFD_RELOC_VTABLE_INHERIT, R_68K_GNU_VTINHERIT },
424 { BFD_RELOC_VTABLE_ENTRY, R_68K_GNU_VTENTRY },
425 { BFD_RELOC_68K_TLS_GD32, R_68K_TLS_GD32 },
426 { BFD_RELOC_68K_TLS_GD16, R_68K_TLS_GD16 },
427 { BFD_RELOC_68K_TLS_GD8, R_68K_TLS_GD8 },
428 { BFD_RELOC_68K_TLS_LDM32, R_68K_TLS_LDM32 },
429 { BFD_RELOC_68K_TLS_LDM16, R_68K_TLS_LDM16 },
430 { BFD_RELOC_68K_TLS_LDM8, R_68K_TLS_LDM8 },
431 { BFD_RELOC_68K_TLS_LDO32, R_68K_TLS_LDO32 },
432 { BFD_RELOC_68K_TLS_LDO16, R_68K_TLS_LDO16 },
433 { BFD_RELOC_68K_TLS_LDO8, R_68K_TLS_LDO8 },
434 { BFD_RELOC_68K_TLS_IE32, R_68K_TLS_IE32 },
435 { BFD_RELOC_68K_TLS_IE16, R_68K_TLS_IE16 },
436 { BFD_RELOC_68K_TLS_IE8, R_68K_TLS_IE8 },
437 { BFD_RELOC_68K_TLS_LE32, R_68K_TLS_LE32 },
438 { BFD_RELOC_68K_TLS_LE16, R_68K_TLS_LE16 },
439 { BFD_RELOC_68K_TLS_LE8, R_68K_TLS_LE8 },
442 static reloc_howto_type *
443 reloc_type_lookup (abfd, code)
444 bfd *abfd ATTRIBUTE_UNUSED;
445 bfd_reloc_code_real_type code;
448 for (i = 0; i < sizeof (reloc_map) / sizeof (reloc_map[0]); i++)
450 if (reloc_map[i].bfd_val == code)
451 return &howto_table[reloc_map[i].elf_val];
456 static reloc_howto_type *
457 reloc_name_lookup (bfd *abfd ATTRIBUTE_UNUSED, const char *r_name)
461 for (i = 0; i < sizeof (howto_table) / sizeof (howto_table[0]); i++)
462 if (howto_table[i].name != NULL
463 && strcasecmp (howto_table[i].name, r_name) == 0)
464 return &howto_table[i];
469 #define bfd_elf32_bfd_reloc_type_lookup reloc_type_lookup
470 #define bfd_elf32_bfd_reloc_name_lookup reloc_name_lookup
471 #define ELF_ARCH bfd_arch_m68k
473 /* Functions for the m68k ELF linker. */
475 /* The name of the dynamic interpreter. This is put in the .interp
478 #define ELF_DYNAMIC_INTERPRETER "/usr/lib/libc.so.1"
480 /* Describes one of the various PLT styles. */
482 struct elf_m68k_plt_info
484 /* The size of each PLT entry. */
487 /* The template for the first PLT entry. */
488 const bfd_byte *plt0_entry;
490 /* Offsets of fields in PLT0_ENTRY that require R_68K_PC32 relocations.
491 The comments by each member indicate the value that the relocation
494 unsigned int got4; /* .got + 4 */
495 unsigned int got8; /* .got + 8 */
498 /* The template for a symbol's PLT entry. */
499 const bfd_byte *symbol_entry;
501 /* Offsets of fields in SYMBOL_ENTRY that require R_68K_PC32 relocations.
502 The comments by each member indicate the value that the relocation
505 unsigned int got; /* the symbol's .got.plt entry */
506 unsigned int plt; /* .plt */
509 /* The offset of the resolver stub from the start of SYMBOL_ENTRY.
510 The stub starts with "move.l #relocoffset,%d0". */
511 bfd_vma symbol_resolve_entry;
514 /* The size in bytes of an entry in the procedure linkage table. */
516 #define PLT_ENTRY_SIZE 20
518 /* The first entry in a procedure linkage table looks like this. See
519 the SVR4 ABI m68k supplement to see how this works. */
521 static const bfd_byte elf_m68k_plt0_entry[PLT_ENTRY_SIZE] =
523 0x2f, 0x3b, 0x01, 0x70, /* move.l (%pc,addr),-(%sp) */
524 0, 0, 0, 2, /* + (.got + 4) - . */
525 0x4e, 0xfb, 0x01, 0x71, /* jmp ([%pc,addr]) */
526 0, 0, 0, 2, /* + (.got + 8) - . */
527 0, 0, 0, 0 /* pad out to 20 bytes. */
530 /* Subsequent entries in a procedure linkage table look like this. */
532 static const bfd_byte elf_m68k_plt_entry[PLT_ENTRY_SIZE] =
534 0x4e, 0xfb, 0x01, 0x71, /* jmp ([%pc,symbol@GOTPC]) */
535 0, 0, 0, 2, /* + (.got.plt entry) - . */
536 0x2f, 0x3c, /* move.l #offset,-(%sp) */
537 0, 0, 0, 0, /* + reloc index */
538 0x60, 0xff, /* bra.l .plt */
539 0, 0, 0, 0 /* + .plt - . */
542 static const struct elf_m68k_plt_info elf_m68k_plt_info = {
544 elf_m68k_plt0_entry, { 4, 12 },
545 elf_m68k_plt_entry, { 4, 16 }, 8
548 #define ISAB_PLT_ENTRY_SIZE 24
550 static const bfd_byte elf_isab_plt0_entry[ISAB_PLT_ENTRY_SIZE] =
552 0x20, 0x3c, /* move.l #offset,%d0 */
553 0, 0, 0, 0, /* + (.got + 4) - . */
554 0x2f, 0x3b, 0x08, 0xfa, /* move.l (-6,%pc,%d0:l),-(%sp) */
555 0x20, 0x3c, /* move.l #offset,%d0 */
556 0, 0, 0, 0, /* + (.got + 8) - . */
557 0x20, 0x7b, 0x08, 0xfa, /* move.l (-6,%pc,%d0:l), %a0 */
558 0x4e, 0xd0, /* jmp (%a0) */
562 /* Subsequent entries in a procedure linkage table look like this. */
564 static const bfd_byte elf_isab_plt_entry[ISAB_PLT_ENTRY_SIZE] =
566 0x20, 0x3c, /* move.l #offset,%d0 */
567 0, 0, 0, 0, /* + (.got.plt entry) - . */
568 0x20, 0x7b, 0x08, 0xfa, /* move.l (-6,%pc,%d0:l), %a0 */
569 0x4e, 0xd0, /* jmp (%a0) */
570 0x2f, 0x3c, /* move.l #offset,-(%sp) */
571 0, 0, 0, 0, /* + reloc index */
572 0x60, 0xff, /* bra.l .plt */
573 0, 0, 0, 0 /* + .plt - . */
576 static const struct elf_m68k_plt_info elf_isab_plt_info = {
578 elf_isab_plt0_entry, { 2, 12 },
579 elf_isab_plt_entry, { 2, 20 }, 12
582 #define ISAC_PLT_ENTRY_SIZE 24
584 static const bfd_byte elf_isac_plt0_entry[ISAC_PLT_ENTRY_SIZE] =
586 0x20, 0x3c, /* move.l #offset,%d0 */
587 0, 0, 0, 0, /* replaced with .got + 4 - . */
588 0x2e, 0xbb, 0x08, 0xfa, /* move.l (-6,%pc,%d0:l),(%sp) */
589 0x20, 0x3c, /* move.l #offset,%d0 */
590 0, 0, 0, 0, /* replaced with .got + 8 - . */
591 0x20, 0x7b, 0x08, 0xfa, /* move.l (-6,%pc,%d0:l), %a0 */
592 0x4e, 0xd0, /* jmp (%a0) */
596 /* Subsequent entries in a procedure linkage table look like this. */
598 static const bfd_byte elf_isac_plt_entry[ISAC_PLT_ENTRY_SIZE] =
600 0x20, 0x3c, /* move.l #offset,%d0 */
601 0, 0, 0, 0, /* replaced with (.got entry) - . */
602 0x20, 0x7b, 0x08, 0xfa, /* move.l (-6,%pc,%d0:l), %a0 */
603 0x4e, 0xd0, /* jmp (%a0) */
604 0x2f, 0x3c, /* move.l #offset,-(%sp) */
605 0, 0, 0, 0, /* replaced with offset into relocation table */
606 0x61, 0xff, /* bsr.l .plt */
607 0, 0, 0, 0 /* replaced with .plt - . */
610 static const struct elf_m68k_plt_info elf_isac_plt_info = {
612 elf_isac_plt0_entry, { 2, 12},
613 elf_isac_plt_entry, { 2, 20 }, 12
616 #define CPU32_PLT_ENTRY_SIZE 24
617 /* Procedure linkage table entries for the cpu32 */
618 static const bfd_byte elf_cpu32_plt0_entry[CPU32_PLT_ENTRY_SIZE] =
620 0x2f, 0x3b, 0x01, 0x70, /* move.l (%pc,addr),-(%sp) */
621 0, 0, 0, 2, /* + (.got + 4) - . */
622 0x22, 0x7b, 0x01, 0x70, /* moveal %pc@(0xc), %a1 */
623 0, 0, 0, 2, /* + (.got + 8) - . */
624 0x4e, 0xd1, /* jmp %a1@ */
625 0, 0, 0, 0, /* pad out to 24 bytes. */
629 static const bfd_byte elf_cpu32_plt_entry[CPU32_PLT_ENTRY_SIZE] =
631 0x22, 0x7b, 0x01, 0x70, /* moveal %pc@(0xc), %a1 */
632 0, 0, 0, 2, /* + (.got.plt entry) - . */
633 0x4e, 0xd1, /* jmp %a1@ */
634 0x2f, 0x3c, /* move.l #offset,-(%sp) */
635 0, 0, 0, 0, /* + reloc index */
636 0x60, 0xff, /* bra.l .plt */
637 0, 0, 0, 0, /* + .plt - . */
641 static const struct elf_m68k_plt_info elf_cpu32_plt_info = {
642 CPU32_PLT_ENTRY_SIZE,
643 elf_cpu32_plt0_entry, { 4, 12 },
644 elf_cpu32_plt_entry, { 4, 18 }, 10
647 /* The m68k linker needs to keep track of the number of relocs that it
648 decides to copy in check_relocs for each symbol. This is so that it
649 can discard PC relative relocs if it doesn't need them when linking
650 with -Bsymbolic. We store the information in a field extending the
651 regular ELF linker hash table. */
653 /* This structure keeps track of the number of PC relative relocs we have
654 copied for a given symbol. */
656 struct elf_m68k_pcrel_relocs_copied
659 struct elf_m68k_pcrel_relocs_copied *next;
660 /* A section in dynobj. */
662 /* Number of relocs copied in this section. */
666 /* Forward declaration. */
667 struct elf_m68k_got_entry;
669 /* m68k ELF linker hash entry. */
671 struct elf_m68k_link_hash_entry
673 struct elf_link_hash_entry root;
675 /* Number of PC relative relocs copied for this symbol. */
676 struct elf_m68k_pcrel_relocs_copied *pcrel_relocs_copied;
678 /* Key to got_entries. */
679 unsigned long got_entry_key;
681 /* List of GOT entries for this symbol. This list is build during
682 offset finalization and is used within elf_m68k_finish_dynamic_symbol
683 to traverse all GOT entries for a particular symbol.
685 ??? We could've used root.got.glist field instead, but having
686 a separate field is cleaner. */
687 struct elf_m68k_got_entry *glist;
690 #define elf_m68k_hash_entry(ent) ((struct elf_m68k_link_hash_entry *) (ent))
692 /* Key part of GOT entry in hashtable. */
693 struct elf_m68k_got_entry_key
695 /* BFD in which this symbol was defined. NULL for global symbols. */
698 /* Symbol index. Either local symbol index or h->got_entry_key. */
699 unsigned long symndx;
701 /* Type is one of R_68K_GOT{8, 16, 32}O, R_68K_TLS_GD{8, 16, 32},
702 R_68K_TLS_LDM{8, 16, 32} or R_68K_TLS_IE{8, 16, 32}.
704 From perspective of hashtable key, only elf_m68k_got_reloc_type (type)
705 matters. That is, we distinguish between, say, R_68K_GOT16O
706 and R_68K_GOT32O when allocating offsets, but they are considered to be
707 the same when searching got->entries. */
708 enum elf_m68k_reloc_type type;
711 /* Size of the GOT offset suitable for relocation. */
712 enum elf_m68k_got_offset_size { R_8, R_16, R_32, R_LAST };
714 /* Entry of the GOT. */
715 struct elf_m68k_got_entry
717 /* GOT entries are put into a got->entries hashtable. This is the key. */
718 struct elf_m68k_got_entry_key key_;
720 /* GOT entry data. We need s1 before offset finalization and s2 after. */
725 /* Number of times this entry is referenced. It is used to
726 filter out unnecessary GOT slots in elf_m68k_gc_sweep_hook. */
732 /* Offset from the start of .got section. To calculate offset relative
733 to GOT pointer one should substract got->offset from this value. */
736 /* Pointer to the next GOT entry for this global symbol.
737 Symbols have at most one entry in one GOT, but might
738 have entries in more than one GOT.
739 Root of this list is h->glist.
740 NULL for local symbols. */
741 struct elf_m68k_got_entry *next;
746 /* Return representative type for relocation R_TYPE.
747 This is used to avoid enumerating many relocations in comparisons,
750 static enum elf_m68k_reloc_type
751 elf_m68k_reloc_got_type (enum elf_m68k_reloc_type r_type)
755 /* In most cases R_68K_GOTx relocations require the very same
756 handling as R_68K_GOT32O relocation. In cases when we need
757 to distinguish between the two, we use explicitly compare against
770 return R_68K_TLS_GD32;
772 case R_68K_TLS_LDM32:
773 case R_68K_TLS_LDM16:
775 return R_68K_TLS_LDM32;
780 return R_68K_TLS_IE32;
788 /* Return size of the GOT entry offset for relocation R_TYPE. */
790 static enum elf_m68k_got_offset_size
791 elf_m68k_reloc_got_offset_size (enum elf_m68k_reloc_type r_type)
795 case R_68K_GOT32: case R_68K_GOT16: case R_68K_GOT8:
796 case R_68K_GOT32O: case R_68K_TLS_GD32: case R_68K_TLS_LDM32:
800 case R_68K_GOT16O: case R_68K_TLS_GD16: case R_68K_TLS_LDM16:
804 case R_68K_GOT8O: case R_68K_TLS_GD8: case R_68K_TLS_LDM8:
814 /* Return number of GOT entries we need to allocate in GOT for
815 relocation R_TYPE. */
818 elf_m68k_reloc_got_n_slots (enum elf_m68k_reloc_type r_type)
820 switch (elf_m68k_reloc_got_type (r_type))
827 case R_68K_TLS_LDM32:
836 /* Return TRUE if relocation R_TYPE is a TLS one. */
839 elf_m68k_reloc_tls_p (enum elf_m68k_reloc_type r_type)
843 case R_68K_TLS_GD32: case R_68K_TLS_GD16: case R_68K_TLS_GD8:
844 case R_68K_TLS_LDM32: case R_68K_TLS_LDM16: case R_68K_TLS_LDM8:
845 case R_68K_TLS_LDO32: case R_68K_TLS_LDO16: case R_68K_TLS_LDO8:
846 case R_68K_TLS_IE32: case R_68K_TLS_IE16: case R_68K_TLS_IE8:
847 case R_68K_TLS_LE32: case R_68K_TLS_LE16: case R_68K_TLS_LE8:
848 case R_68K_TLS_DTPMOD32: case R_68K_TLS_DTPREL32: case R_68K_TLS_TPREL32:
856 /* Data structure representing a single GOT. */
859 /* Hashtable of 'struct elf_m68k_got_entry's.
860 Starting size of this table is the maximum number of
861 R_68K_GOT8O entries. */
864 /* Number of R_x slots in this GOT. Some (e.g., TLS) entries require
867 n_slots[R_8] is the count of R_8 slots in this GOT.
868 n_slots[R_16] is the cumulative count of R_8 and R_16 slots
870 n_slots[R_32] is the cumulative count of R_8, R_16 and R_32 slots
871 in this GOT. This is the total number of slots. */
872 bfd_vma n_slots[R_LAST];
874 /* Number of local (entry->key_.h == NULL) slots in this GOT.
875 This is only used to properly calculate size of .rela.got section;
876 see elf_m68k_partition_multi_got. */
877 bfd_vma local_n_slots;
879 /* Offset of this GOT relative to beginning of .got section. */
883 /* BFD and its GOT. This is an entry in multi_got->bfd2got hashtable. */
884 struct elf_m68k_bfd2got_entry
889 /* Assigned GOT. Before partitioning multi-GOT each BFD has its own
890 GOT structure. After partitioning several BFD's might [and often do]
891 share a single GOT. */
892 struct elf_m68k_got *got;
895 /* The main data structure holding all the pieces. */
896 struct elf_m68k_multi_got
898 /* Hashtable mapping each BFD to its GOT. If a BFD doesn't have an entry
899 here, then it doesn't need a GOT (this includes the case of a BFD
900 having an empty GOT).
902 ??? This hashtable can be replaced by an array indexed by bfd->id. */
905 /* Next symndx to assign a global symbol.
906 h->got_entry_key is initialized from this counter. */
907 unsigned long global_symndx;
910 /* m68k ELF linker hash table. */
912 struct elf_m68k_link_hash_table
914 struct elf_link_hash_table root;
916 /* Small local sym cache. */
917 struct sym_cache sym_cache;
919 /* The PLT format used by this link, or NULL if the format has not
921 const struct elf_m68k_plt_info *plt_info;
923 /* True, if GP is loaded within each function which uses it.
924 Set to TRUE when GOT negative offsets or multi-GOT is enabled. */
925 bfd_boolean local_gp_p;
927 /* Switch controlling use of negative offsets to double the size of GOTs. */
928 bfd_boolean use_neg_got_offsets_p;
930 /* Switch controlling generation of multiple GOTs. */
931 bfd_boolean allow_multigot_p;
933 /* Multi-GOT data structure. */
934 struct elf_m68k_multi_got multi_got_;
937 /* Get the m68k ELF linker hash table from a link_info structure. */
939 #define elf_m68k_hash_table(p) \
940 ((struct elf_m68k_link_hash_table *) (p)->hash)
942 /* Shortcut to multi-GOT data. */
943 #define elf_m68k_multi_got(INFO) (&elf_m68k_hash_table (INFO)->multi_got_)
945 /* Create an entry in an m68k ELF linker hash table. */
947 static struct bfd_hash_entry *
948 elf_m68k_link_hash_newfunc (entry, table, string)
949 struct bfd_hash_entry *entry;
950 struct bfd_hash_table *table;
953 struct bfd_hash_entry *ret = entry;
955 /* Allocate the structure if it has not already been allocated by a
958 ret = bfd_hash_allocate (table,
959 sizeof (struct elf_m68k_link_hash_entry));
963 /* Call the allocation method of the superclass. */
964 ret = _bfd_elf_link_hash_newfunc (ret, table, string);
967 elf_m68k_hash_entry (ret)->pcrel_relocs_copied = NULL;
968 elf_m68k_hash_entry (ret)->got_entry_key = 0;
969 elf_m68k_hash_entry (ret)->glist = NULL;
975 /* Create an m68k ELF linker hash table. */
977 static struct bfd_link_hash_table *
978 elf_m68k_link_hash_table_create (abfd)
981 struct elf_m68k_link_hash_table *ret;
982 bfd_size_type amt = sizeof (struct elf_m68k_link_hash_table);
984 ret = (struct elf_m68k_link_hash_table *) bfd_malloc (amt);
985 if (ret == (struct elf_m68k_link_hash_table *) NULL)
988 if (!_bfd_elf_link_hash_table_init (&ret->root, abfd,
989 elf_m68k_link_hash_newfunc,
990 sizeof (struct elf_m68k_link_hash_entry)))
996 ret->sym_cache.abfd = NULL;
997 ret->plt_info = NULL;
998 ret->local_gp_p = FALSE;
999 ret->use_neg_got_offsets_p = FALSE;
1000 ret->allow_multigot_p = FALSE;
1001 ret->multi_got_.bfd2got = NULL;
1002 ret->multi_got_.global_symndx = 1;
1004 return &ret->root.root;
1007 /* Destruct local data. */
1010 elf_m68k_link_hash_table_free (struct bfd_link_hash_table *_htab)
1012 struct elf_m68k_link_hash_table *htab;
1014 htab = (struct elf_m68k_link_hash_table *) _htab;
1016 if (htab->multi_got_.bfd2got != NULL)
1018 htab_delete (htab->multi_got_.bfd2got);
1019 htab->multi_got_.bfd2got = NULL;
1023 /* Set the right machine number. */
1026 elf32_m68k_object_p (bfd *abfd)
1028 unsigned int mach = 0;
1029 unsigned features = 0;
1030 flagword eflags = elf_elfheader (abfd)->e_flags;
1032 if ((eflags & EF_M68K_ARCH_MASK) == EF_M68K_M68000)
1034 else if ((eflags & EF_M68K_ARCH_MASK) == EF_M68K_CPU32)
1036 else if ((eflags & EF_M68K_ARCH_MASK) == EF_M68K_FIDO)
1040 switch (eflags & EF_M68K_CF_ISA_MASK)
1042 case EF_M68K_CF_ISA_A_NODIV:
1043 features |= mcfisa_a;
1045 case EF_M68K_CF_ISA_A:
1046 features |= mcfisa_a|mcfhwdiv;
1048 case EF_M68K_CF_ISA_A_PLUS:
1049 features |= mcfisa_a|mcfisa_aa|mcfhwdiv|mcfusp;
1051 case EF_M68K_CF_ISA_B_NOUSP:
1052 features |= mcfisa_a|mcfisa_b|mcfhwdiv;
1054 case EF_M68K_CF_ISA_B:
1055 features |= mcfisa_a|mcfisa_b|mcfhwdiv|mcfusp;
1057 case EF_M68K_CF_ISA_C:
1058 features |= mcfisa_a|mcfisa_c|mcfhwdiv|mcfusp;
1060 case EF_M68K_CF_ISA_C_NODIV:
1061 features |= mcfisa_a|mcfisa_c|mcfusp;
1064 switch (eflags & EF_M68K_CF_MAC_MASK)
1066 case EF_M68K_CF_MAC:
1069 case EF_M68K_CF_EMAC:
1070 features |= mcfemac;
1073 if (eflags & EF_M68K_CF_FLOAT)
1077 mach = bfd_m68k_features_to_mach (features);
1078 bfd_default_set_arch_mach (abfd, bfd_arch_m68k, mach);
1083 /* Keep m68k-specific flags in the ELF header. */
1085 elf32_m68k_set_private_flags (abfd, flags)
1089 elf_elfheader (abfd)->e_flags = flags;
1090 elf_flags_init (abfd) = TRUE;
1094 /* Merge backend specific data from an object file to the output
1095 object file when linking. */
1097 elf32_m68k_merge_private_bfd_data (ibfd, obfd)
1105 const bfd_arch_info_type *arch_info;
1107 if ( bfd_get_flavour (ibfd) != bfd_target_elf_flavour
1108 || bfd_get_flavour (obfd) != bfd_target_elf_flavour)
1111 /* Get the merged machine. This checks for incompatibility between
1112 Coldfire & non-Coldfire flags, incompability between different
1113 Coldfire ISAs, and incompability between different MAC types. */
1114 arch_info = bfd_arch_get_compatible (ibfd, obfd, FALSE);
1118 bfd_set_arch_mach (obfd, bfd_arch_m68k, arch_info->mach);
1120 in_flags = elf_elfheader (ibfd)->e_flags;
1121 if (!elf_flags_init (obfd))
1123 elf_flags_init (obfd) = TRUE;
1124 out_flags = in_flags;
1128 out_flags = elf_elfheader (obfd)->e_flags;
1129 unsigned int variant_mask;
1131 if ((in_flags & EF_M68K_ARCH_MASK) == EF_M68K_M68000)
1133 else if ((in_flags & EF_M68K_ARCH_MASK) == EF_M68K_CPU32)
1135 else if ((in_flags & EF_M68K_ARCH_MASK) == EF_M68K_FIDO)
1138 variant_mask = EF_M68K_CF_ISA_MASK;
1140 in_isa = (in_flags & variant_mask);
1141 out_isa = (out_flags & variant_mask);
1142 if (in_isa > out_isa)
1143 out_flags ^= in_isa ^ out_isa;
1144 if (((in_flags & EF_M68K_ARCH_MASK) == EF_M68K_CPU32
1145 && (out_flags & EF_M68K_ARCH_MASK) == EF_M68K_FIDO)
1146 || ((in_flags & EF_M68K_ARCH_MASK) == EF_M68K_FIDO
1147 && (out_flags & EF_M68K_ARCH_MASK) == EF_M68K_CPU32))
1148 out_flags = EF_M68K_FIDO;
1150 out_flags |= in_flags ^ in_isa;
1152 elf_elfheader (obfd)->e_flags = out_flags;
1157 /* Display the flags field. */
1160 elf32_m68k_print_private_bfd_data (bfd *abfd, void * ptr)
1162 FILE *file = (FILE *) ptr;
1163 flagword eflags = elf_elfheader (abfd)->e_flags;
1165 BFD_ASSERT (abfd != NULL && ptr != NULL);
1167 /* Print normal ELF private data. */
1168 _bfd_elf_print_private_bfd_data (abfd, ptr);
1170 /* Ignore init flag - it may not be set, despite the flags field containing valid data. */
1172 /* xgettext:c-format */
1173 fprintf (file, _("private flags = %lx:"), elf_elfheader (abfd)->e_flags);
1175 if ((eflags & EF_M68K_ARCH_MASK) == EF_M68K_M68000)
1176 fprintf (file, " [m68000]");
1177 else if ((eflags & EF_M68K_ARCH_MASK) == EF_M68K_CPU32)
1178 fprintf (file, " [cpu32]");
1179 else if ((eflags & EF_M68K_ARCH_MASK) == EF_M68K_FIDO)
1180 fprintf (file, " [fido]");
1183 if ((eflags & EF_M68K_ARCH_MASK) == EF_M68K_CFV4E)
1184 fprintf (file, " [cfv4e]");
1186 if (eflags & EF_M68K_CF_ISA_MASK)
1188 char const *isa = _("unknown");
1189 char const *mac = _("unknown");
1190 char const *additional = "";
1192 switch (eflags & EF_M68K_CF_ISA_MASK)
1194 case EF_M68K_CF_ISA_A_NODIV:
1196 additional = " [nodiv]";
1198 case EF_M68K_CF_ISA_A:
1201 case EF_M68K_CF_ISA_A_PLUS:
1204 case EF_M68K_CF_ISA_B_NOUSP:
1206 additional = " [nousp]";
1208 case EF_M68K_CF_ISA_B:
1211 case EF_M68K_CF_ISA_C:
1214 case EF_M68K_CF_ISA_C_NODIV:
1216 additional = " [nodiv]";
1219 fprintf (file, " [isa %s]%s", isa, additional);
1221 if (eflags & EF_M68K_CF_FLOAT)
1222 fprintf (file, " [float]");
1224 switch (eflags & EF_M68K_CF_MAC_MASK)
1229 case EF_M68K_CF_MAC:
1232 case EF_M68K_CF_EMAC:
1237 fprintf (file, " [%s]", mac);
1246 /* Multi-GOT support implementation design:
1248 Multi-GOT starts in check_relocs hook. There we scan all
1249 relocations of a BFD and build a local GOT (struct elf_m68k_got)
1250 for it. If a single BFD appears to require too many GOT slots with
1251 R_68K_GOT8O or R_68K_GOT16O relocations, we fail with notification
1253 After check_relocs has been invoked for each input BFD, we have
1254 constructed a GOT for each input BFD.
1256 To minimize total number of GOTs required for a particular output BFD
1257 (as some environments support only 1 GOT per output object) we try
1258 to merge some of the GOTs to share an offset space. Ideally [and in most
1259 cases] we end up with a single GOT. In cases when there are too many
1260 restricted relocations (e.g., R_68K_GOT16O relocations) we end up with
1261 several GOTs, assuming the environment can handle them.
1263 Partitioning is done in elf_m68k_partition_multi_got. We start with
1264 an empty GOT and traverse bfd2got hashtable putting got_entries from
1265 local GOTs to the new 'big' one. We do that by constructing an
1266 intermediate GOT holding all the entries the local GOT has and the big
1267 GOT lacks. Then we check if there is room in the big GOT to accomodate
1268 all the entries from diff. On success we add those entries to the big
1269 GOT; on failure we start the new 'big' GOT and retry the adding of
1270 entries from the local GOT. Note that this retry will always succeed as
1271 each local GOT doesn't overflow the limits. After partitioning we
1272 end up with each bfd assigned one of the big GOTs. GOT entries in the
1273 big GOTs are initialized with GOT offsets. Note that big GOTs are
1274 positioned consequently in program space and represent a single huge GOT
1275 to the outside world.
1277 After that we get to elf_m68k_relocate_section. There we
1278 adjust relocations of GOT pointer (_GLOBAL_OFFSET_TABLE_) and symbol
1279 relocations to refer to appropriate [assigned to current input_bfd]
1284 GOT entry type: We have several types of GOT entries.
1285 * R_8 type is used in entries for symbols that have at least one
1286 R_68K_GOT8O or R_68K_TLS_*8 relocation. We can have at most 0x40
1287 such entries in one GOT.
1288 * R_16 type is used in entries for symbols that have at least one
1289 R_68K_GOT16O or R_68K_TLS_*16 relocation and no R_8 relocations.
1290 We can have at most 0x4000 such entries in one GOT.
1291 * R_32 type is used in all other cases. We can have as many
1292 such entries in one GOT as we'd like.
1293 When counting relocations we have to include the count of the smaller
1294 ranged relocations in the counts of the larger ranged ones in order
1295 to correctly detect overflow.
1297 Sorting the GOT: In each GOT starting offsets are assigned to
1298 R_8 entries, which are followed by R_16 entries, and
1299 R_32 entries go at the end. See finalize_got_offsets for details.
1301 Negative GOT offsets: To double usable offset range of GOTs we use
1302 negative offsets. As we assign entries with GOT offsets relative to
1303 start of .got section, the offset values are positive. They become
1304 negative only in relocate_section where got->offset value is
1305 subtracted from them.
1307 3 special GOT entries: There are 3 special GOT entries used internally
1308 by loader. These entries happen to be placed to .got.plt section,
1309 so we don't do anything about them in multi-GOT support.
1311 Memory management: All data except for hashtables
1312 multi_got->bfd2got and got->entries are allocated on
1313 elf_hash_table (info)->dynobj bfd (for this reason we pass 'info'
1314 to most functions), so we don't need to care to free them. At the
1315 moment of allocation hashtables are being linked into main data
1316 structure (multi_got), all pieces of which are reachable from
1317 elf_m68k_multi_got (info). We deallocate them in
1318 elf_m68k_link_hash_table_free. */
1320 /* Initialize GOT. */
1323 elf_m68k_init_got (struct elf_m68k_got *got)
1325 got->entries = NULL;
1326 got->n_slots[R_8] = 0;
1327 got->n_slots[R_16] = 0;
1328 got->n_slots[R_32] = 0;
1329 got->local_n_slots = 0;
1330 got->offset = (bfd_vma) -1;
1336 elf_m68k_clear_got (struct elf_m68k_got *got)
1338 if (got->entries != NULL)
1340 htab_delete (got->entries);
1341 got->entries = NULL;
1345 /* Create and empty GOT structure. INFO is the context where memory
1346 should be allocated. */
1348 static struct elf_m68k_got *
1349 elf_m68k_create_empty_got (struct bfd_link_info *info)
1351 struct elf_m68k_got *got;
1353 got = bfd_alloc (elf_hash_table (info)->dynobj, sizeof (*got));
1357 elf_m68k_init_got (got);
1362 /* Initialize KEY. */
1365 elf_m68k_init_got_entry_key (struct elf_m68k_got_entry_key *key,
1366 struct elf_link_hash_entry *h,
1367 const bfd *abfd, unsigned long symndx,
1368 enum elf_m68k_reloc_type reloc_type)
1370 if (elf_m68k_reloc_got_type (reloc_type) == R_68K_TLS_LDM32)
1371 /* All TLS_LDM relocations share a single GOT entry. */
1377 /* Global symbols are identified with their got_entry_key. */
1380 key->symndx = elf_m68k_hash_entry (h)->got_entry_key;
1381 BFD_ASSERT (key->symndx != 0);
1384 /* Local symbols are identified by BFD they appear in and symndx. */
1387 key->symndx = symndx;
1390 key->type = reloc_type;
1393 /* Calculate hash of got_entry.
1397 elf_m68k_got_entry_hash (const void *_entry)
1399 const struct elf_m68k_got_entry_key *key;
1401 key = &((const struct elf_m68k_got_entry *) _entry)->key_;
1404 + (key->bfd != NULL ? (int) key->bfd->id : -1)
1405 + elf_m68k_reloc_got_type (key->type));
1408 /* Check if two got entries are equal. */
1411 elf_m68k_got_entry_eq (const void *_entry1, const void *_entry2)
1413 const struct elf_m68k_got_entry_key *key1;
1414 const struct elf_m68k_got_entry_key *key2;
1416 key1 = &((const struct elf_m68k_got_entry *) _entry1)->key_;
1417 key2 = &((const struct elf_m68k_got_entry *) _entry2)->key_;
1419 return (key1->bfd == key2->bfd
1420 && key1->symndx == key2->symndx
1421 && (elf_m68k_reloc_got_type (key1->type)
1422 == elf_m68k_reloc_got_type (key2->type)));
1425 /* When using negative offsets, we allocate one extra R_8, one extra R_16
1426 and one extra R_32 slots to simplify handling of 2-slot entries during
1427 offset allocation -- hence -1 for R_8 slots and -2 for R_16 slots. */
1429 /* Maximal number of R_8 slots in a single GOT. */
1430 #define ELF_M68K_R_8_MAX_N_SLOTS_IN_GOT(INFO) \
1431 (elf_m68k_hash_table (INFO)->use_neg_got_offsets_p \
1435 /* Maximal number of R_8 and R_16 slots in a single GOT. */
1436 #define ELF_M68K_R_8_16_MAX_N_SLOTS_IN_GOT(INFO) \
1437 (elf_m68k_hash_table (INFO)->use_neg_got_offsets_p \
1441 /* SEARCH - simply search the hashtable, don't insert new entries or fail when
1442 the entry cannot be found.
1443 FIND_OR_CREATE - search for an existing entry, but create new if there's
1445 MUST_FIND - search for an existing entry and assert that it exist.
1446 MUST_CREATE - assert that there's no such entry and create new one. */
1447 enum elf_m68k_get_entry_howto
1455 /* Get or create (depending on HOWTO) entry with KEY in GOT.
1456 INFO is context in which memory should be allocated (can be NULL if
1457 HOWTO is SEARCH or MUST_FIND). */
1459 static struct elf_m68k_got_entry *
1460 elf_m68k_get_got_entry (struct elf_m68k_got *got,
1461 const struct elf_m68k_got_entry_key *key,
1462 enum elf_m68k_get_entry_howto howto,
1463 struct bfd_link_info *info)
1465 struct elf_m68k_got_entry entry_;
1466 struct elf_m68k_got_entry *entry;
1469 BFD_ASSERT ((info == NULL) == (howto == SEARCH || howto == MUST_FIND));
1471 if (got->entries == NULL)
1472 /* This is the first entry in ABFD. Initialize hashtable. */
1474 if (howto == SEARCH)
1477 got->entries = htab_try_create (ELF_M68K_R_8_MAX_N_SLOTS_IN_GOT
1479 elf_m68k_got_entry_hash,
1480 elf_m68k_got_entry_eq, NULL);
1481 if (got->entries == NULL)
1483 bfd_set_error (bfd_error_no_memory);
1489 ptr = htab_find_slot (got->entries, &entry_, (howto != SEARCH
1490 ? INSERT : NO_INSERT));
1493 if (howto == SEARCH)
1494 /* Entry not found. */
1497 /* We're out of memory. */
1498 bfd_set_error (bfd_error_no_memory);
1503 /* We didn't find the entry and we're asked to create a new one. */
1505 BFD_ASSERT (howto != MUST_FIND && howto != SEARCH);
1507 entry = bfd_alloc (elf_hash_table (info)->dynobj, sizeof (*entry));
1511 /* Initialize new entry. */
1514 entry->u.s1.refcount = 0;
1516 /* Mark the entry as not initialized. */
1517 entry->key_.type = R_68K_max;
1522 /* We found the entry. */
1524 BFD_ASSERT (howto != MUST_CREATE);
1532 /* Update GOT counters when merging entry of WAS type with entry of NEW type.
1533 Return the value to which ENTRY's type should be set. */
1535 static enum elf_m68k_reloc_type
1536 elf_m68k_update_got_entry_type (struct elf_m68k_got *got,
1537 enum elf_m68k_reloc_type was,
1538 enum elf_m68k_reloc_type new_reloc)
1540 enum elf_m68k_got_offset_size was_size;
1541 enum elf_m68k_got_offset_size new_size;
1544 if (was == R_68K_max)
1545 /* The type of the entry is not initialized yet. */
1547 /* Update all got->n_slots counters, including n_slots[R_32]. */
1554 /* !!! We, probably, should emit an error rather then fail on assert
1556 BFD_ASSERT (elf_m68k_reloc_got_type (was)
1557 == elf_m68k_reloc_got_type (new_reloc));
1559 was_size = elf_m68k_reloc_got_offset_size (was);
1562 new_size = elf_m68k_reloc_got_offset_size (new_reloc);
1563 n_slots = elf_m68k_reloc_got_n_slots (new_reloc);
1565 while (was_size > new_size)
1568 got->n_slots[was_size] += n_slots;
1571 if (new_reloc > was)
1572 /* Relocations are ordered from bigger got offset size to lesser,
1573 so choose the relocation type with lesser offset size. */
1579 /* Update GOT counters when removing an entry of type TYPE. */
1582 elf_m68k_remove_got_entry_type (struct elf_m68k_got *got,
1583 enum elf_m68k_reloc_type type)
1585 enum elf_m68k_got_offset_size os;
1588 n_slots = elf_m68k_reloc_got_n_slots (type);
1590 /* Decrese counter of slots with offset size corresponding to TYPE
1591 and all greater offset sizes. */
1592 for (os = elf_m68k_reloc_got_offset_size (type); os <= R_32; ++os)
1594 BFD_ASSERT (got->n_slots[os] >= n_slots);
1596 got->n_slots[os] -= n_slots;
1600 /* Add new or update existing entry to GOT.
1601 H, ABFD, TYPE and SYMNDX is data for the entry.
1602 INFO is a context where memory should be allocated. */
1604 static struct elf_m68k_got_entry *
1605 elf_m68k_add_entry_to_got (struct elf_m68k_got *got,
1606 struct elf_link_hash_entry *h,
1608 enum elf_m68k_reloc_type reloc_type,
1609 unsigned long symndx,
1610 struct bfd_link_info *info)
1612 struct elf_m68k_got_entry_key key_;
1613 struct elf_m68k_got_entry *entry;
1615 if (h != NULL && elf_m68k_hash_entry (h)->got_entry_key == 0)
1616 elf_m68k_hash_entry (h)->got_entry_key
1617 = elf_m68k_multi_got (info)->global_symndx++;
1619 elf_m68k_init_got_entry_key (&key_, h, abfd, symndx, reloc_type);
1621 entry = elf_m68k_get_got_entry (got, &key_, FIND_OR_CREATE, info);
1625 /* Determine entry's type and update got->n_slots counters. */
1626 entry->key_.type = elf_m68k_update_got_entry_type (got,
1630 /* Update refcount. */
1631 ++entry->u.s1.refcount;
1633 if (entry->u.s1.refcount == 1)
1634 /* We see this entry for the first time. */
1636 if (entry->key_.bfd != NULL)
1637 got->local_n_slots += elf_m68k_reloc_got_n_slots (entry->key_.type);
1640 BFD_ASSERT (got->n_slots[R_32] >= got->local_n_slots);
1642 if ((got->n_slots[R_8]
1643 > ELF_M68K_R_8_MAX_N_SLOTS_IN_GOT (info))
1644 || (got->n_slots[R_16]
1645 > ELF_M68K_R_8_16_MAX_N_SLOTS_IN_GOT (info)))
1646 /* This BFD has too many relocation. */
1648 if (got->n_slots[R_8] > ELF_M68K_R_8_MAX_N_SLOTS_IN_GOT (info))
1649 (*_bfd_error_handler) (_("%B: GOT overflow: "
1650 "Number of relocations with 8-bit "
1653 ELF_M68K_R_8_MAX_N_SLOTS_IN_GOT (info));
1655 (*_bfd_error_handler) (_("%B: GOT overflow: "
1656 "Number of relocations with 8- or 16-bit "
1659 ELF_M68K_R_8_16_MAX_N_SLOTS_IN_GOT (info));
1667 /* Compute the hash value of the bfd in a bfd2got hash entry. */
1670 elf_m68k_bfd2got_entry_hash (const void *entry)
1672 const struct elf_m68k_bfd2got_entry *e;
1674 e = (const struct elf_m68k_bfd2got_entry *) entry;
1679 /* Check whether two hash entries have the same bfd. */
1682 elf_m68k_bfd2got_entry_eq (const void *entry1, const void *entry2)
1684 const struct elf_m68k_bfd2got_entry *e1;
1685 const struct elf_m68k_bfd2got_entry *e2;
1687 e1 = (const struct elf_m68k_bfd2got_entry *) entry1;
1688 e2 = (const struct elf_m68k_bfd2got_entry *) entry2;
1690 return e1->bfd == e2->bfd;
1693 /* Destruct a bfd2got entry. */
1696 elf_m68k_bfd2got_entry_del (void *_entry)
1698 struct elf_m68k_bfd2got_entry *entry;
1700 entry = (struct elf_m68k_bfd2got_entry *) _entry;
1702 BFD_ASSERT (entry->got != NULL);
1703 elf_m68k_clear_got (entry->got);
1706 /* Find existing or create new (depending on HOWTO) bfd2got entry in
1707 MULTI_GOT. ABFD is the bfd we need a GOT for. INFO is a context where
1708 memory should be allocated. */
1710 static struct elf_m68k_bfd2got_entry *
1711 elf_m68k_get_bfd2got_entry (struct elf_m68k_multi_got *multi_got,
1713 enum elf_m68k_get_entry_howto howto,
1714 struct bfd_link_info *info)
1716 struct elf_m68k_bfd2got_entry entry_;
1718 struct elf_m68k_bfd2got_entry *entry;
1720 BFD_ASSERT ((info == NULL) == (howto == SEARCH || howto == MUST_FIND));
1722 if (multi_got->bfd2got == NULL)
1723 /* This is the first GOT. Initialize bfd2got. */
1725 if (howto == SEARCH)
1728 multi_got->bfd2got = htab_try_create (1, elf_m68k_bfd2got_entry_hash,
1729 elf_m68k_bfd2got_entry_eq,
1730 elf_m68k_bfd2got_entry_del);
1731 if (multi_got->bfd2got == NULL)
1733 bfd_set_error (bfd_error_no_memory);
1739 ptr = htab_find_slot (multi_got->bfd2got, &entry_, (howto != SEARCH
1740 ? INSERT : NO_INSERT));
1743 if (howto == SEARCH)
1744 /* Entry not found. */
1747 /* We're out of memory. */
1748 bfd_set_error (bfd_error_no_memory);
1753 /* Entry was not found. Create new one. */
1755 BFD_ASSERT (howto != MUST_FIND && howto != SEARCH);
1757 entry = ((struct elf_m68k_bfd2got_entry *)
1758 bfd_alloc (elf_hash_table (info)->dynobj, sizeof (*entry)));
1764 entry->got = elf_m68k_create_empty_got (info);
1765 if (entry->got == NULL)
1772 BFD_ASSERT (howto != MUST_CREATE);
1774 /* Return existing entry. */
1781 struct elf_m68k_can_merge_gots_arg
1783 /* A current_got that we constructing a DIFF against. */
1784 struct elf_m68k_got *big;
1786 /* GOT holding entries not present or that should be changed in
1788 struct elf_m68k_got *diff;
1790 /* Context where to allocate memory. */
1791 struct bfd_link_info *info;
1794 bfd_boolean error_p;
1797 /* Process a single entry from the small GOT to see if it should be added
1798 or updated in the big GOT. */
1801 elf_m68k_can_merge_gots_1 (void **_entry_ptr, void *_arg)
1803 const struct elf_m68k_got_entry *entry1;
1804 struct elf_m68k_can_merge_gots_arg *arg;
1805 const struct elf_m68k_got_entry *entry2;
1806 enum elf_m68k_reloc_type type;
1808 entry1 = (const struct elf_m68k_got_entry *) *_entry_ptr;
1809 arg = (struct elf_m68k_can_merge_gots_arg *) _arg;
1811 entry2 = elf_m68k_get_got_entry (arg->big, &entry1->key_, SEARCH, NULL);
1814 /* We found an existing entry. Check if we should update it. */
1816 type = elf_m68k_update_got_entry_type (arg->diff,
1820 if (type == entry2->key_.type)
1821 /* ENTRY1 doesn't update data in ENTRY2. Skip it.
1822 To skip creation of difference entry we use the type,
1823 which we won't see in GOT entries for sure. */
1827 /* We didn't find the entry. Add entry1 to DIFF. */
1829 BFD_ASSERT (entry1->key_.type != R_68K_max);
1831 type = elf_m68k_update_got_entry_type (arg->diff,
1832 R_68K_max, entry1->key_.type);
1834 if (entry1->key_.bfd != NULL)
1835 arg->diff->local_n_slots += elf_m68k_reloc_got_n_slots (type);
1838 if (type != R_68K_max)
1839 /* Create an entry in DIFF. */
1841 struct elf_m68k_got_entry *entry;
1843 entry = elf_m68k_get_got_entry (arg->diff, &entry1->key_, MUST_CREATE,
1847 arg->error_p = TRUE;
1851 entry->key_.type = type;
1857 /* Return TRUE if SMALL GOT can be added to BIG GOT without overflowing it.
1858 Construct DIFF GOT holding the entries which should be added or updated
1859 in BIG GOT to accumulate information from SMALL.
1860 INFO is the context where memory should be allocated. */
1863 elf_m68k_can_merge_gots (struct elf_m68k_got *big,
1864 const struct elf_m68k_got *small,
1865 struct bfd_link_info *info,
1866 struct elf_m68k_got *diff)
1868 struct elf_m68k_can_merge_gots_arg arg_;
1870 BFD_ASSERT (small->offset == (bfd_vma) -1);
1875 arg_.error_p = FALSE;
1876 htab_traverse_noresize (small->entries, elf_m68k_can_merge_gots_1, &arg_);
1883 /* Check for overflow. */
1884 if ((big->n_slots[R_8] + arg_.diff->n_slots[R_8]
1885 > ELF_M68K_R_8_MAX_N_SLOTS_IN_GOT (info))
1886 || (big->n_slots[R_16] + arg_.diff->n_slots[R_16]
1887 > ELF_M68K_R_8_16_MAX_N_SLOTS_IN_GOT (info)))
1893 struct elf_m68k_merge_gots_arg
1896 struct elf_m68k_got *big;
1898 /* Context where memory should be allocated. */
1899 struct bfd_link_info *info;
1902 bfd_boolean error_p;
1905 /* Process a single entry from DIFF got. Add or update corresponding
1906 entry in the BIG got. */
1909 elf_m68k_merge_gots_1 (void **entry_ptr, void *_arg)
1911 const struct elf_m68k_got_entry *from;
1912 struct elf_m68k_merge_gots_arg *arg;
1913 struct elf_m68k_got_entry *to;
1915 from = (const struct elf_m68k_got_entry *) *entry_ptr;
1916 arg = (struct elf_m68k_merge_gots_arg *) _arg;
1918 to = elf_m68k_get_got_entry (arg->big, &from->key_, FIND_OR_CREATE,
1922 arg->error_p = TRUE;
1926 BFD_ASSERT (to->u.s1.refcount == 0);
1927 /* All we need to merge is TYPE. */
1928 to->key_.type = from->key_.type;
1933 /* Merge data from DIFF to BIG. INFO is context where memory should be
1937 elf_m68k_merge_gots (struct elf_m68k_got *big,
1938 struct elf_m68k_got *diff,
1939 struct bfd_link_info *info)
1941 if (diff->entries != NULL)
1942 /* DIFF is not empty. Merge it into BIG GOT. */
1944 struct elf_m68k_merge_gots_arg arg_;
1946 /* Merge entries. */
1949 arg_.error_p = FALSE;
1950 htab_traverse_noresize (diff->entries, elf_m68k_merge_gots_1, &arg_);
1954 /* Merge counters. */
1955 big->n_slots[R_8] += diff->n_slots[R_8];
1956 big->n_slots[R_16] += diff->n_slots[R_16];
1957 big->n_slots[R_32] += diff->n_slots[R_32];
1958 big->local_n_slots += diff->local_n_slots;
1961 /* DIFF is empty. */
1963 BFD_ASSERT (diff->n_slots[R_8] == 0);
1964 BFD_ASSERT (diff->n_slots[R_16] == 0);
1965 BFD_ASSERT (diff->n_slots[R_32] == 0);
1966 BFD_ASSERT (diff->local_n_slots == 0);
1969 BFD_ASSERT (!elf_m68k_hash_table (info)->allow_multigot_p
1970 || ((big->n_slots[R_8]
1971 <= ELF_M68K_R_8_MAX_N_SLOTS_IN_GOT (info))
1972 && (big->n_slots[R_16]
1973 <= ELF_M68K_R_8_16_MAX_N_SLOTS_IN_GOT (info))));
1978 struct elf_m68k_finalize_got_offsets_arg
1980 /* Ranges of the offsets for GOT entries.
1981 R_x entries receive offsets between offset1[R_x] and offset2[R_x].
1982 R_x is R_8, R_16 and R_32. */
1986 /* Mapping from global symndx to global symbols.
1987 This is used to build lists of got entries for global symbols. */
1988 struct elf_m68k_link_hash_entry **symndx2h;
1990 bfd_vma n_ldm_entries;
1993 /* Assign ENTRY an offset. Build list of GOT entries for global symbols
1997 elf_m68k_finalize_got_offsets_1 (void **entry_ptr, void *_arg)
1999 struct elf_m68k_got_entry *entry;
2000 struct elf_m68k_finalize_got_offsets_arg *arg;
2002 enum elf_m68k_got_offset_size got_offset_size;
2005 entry = (struct elf_m68k_got_entry *) *entry_ptr;
2006 arg = (struct elf_m68k_finalize_got_offsets_arg *) _arg;
2008 /* This should be a fresh entry created in elf_m68k_can_merge_gots. */
2009 BFD_ASSERT (entry->u.s1.refcount == 0);
2011 /* Get GOT offset size for the entry . */
2012 got_offset_size = elf_m68k_reloc_got_offset_size (entry->key_.type);
2014 /* Calculate entry size in bytes. */
2015 entry_size = 4 * elf_m68k_reloc_got_n_slots (entry->key_.type);
2017 /* Check if we should switch to negative range of the offsets. */
2018 if (arg->offset1[got_offset_size] + entry_size
2019 > arg->offset2[got_offset_size])
2021 /* Verify that this is the only switch to negative range for
2022 got_offset_size. If this assertion fails, then we've miscalculated
2023 range for got_offset_size entries in
2024 elf_m68k_finalize_got_offsets. */
2025 BFD_ASSERT (arg->offset2[got_offset_size]
2026 != arg->offset2[-(int) got_offset_size - 1]);
2029 arg->offset1[got_offset_size] = arg->offset1[-(int) got_offset_size - 1];
2030 arg->offset2[got_offset_size] = arg->offset2[-(int) got_offset_size - 1];
2032 /* Verify that now we have enough room for the entry. */
2033 BFD_ASSERT (arg->offset1[got_offset_size] + entry_size
2034 <= arg->offset2[got_offset_size]);
2037 /* Assign offset to entry. */
2038 entry->u.s2.offset = arg->offset1[got_offset_size];
2039 arg->offset1[got_offset_size] += entry_size;
2041 if (entry->key_.bfd == NULL)
2042 /* Hook up this entry into the list of got_entries of H. */
2044 struct elf_m68k_link_hash_entry *h;
2046 h = arg->symndx2h[entry->key_.symndx];
2049 entry->u.s2.next = h->glist;
2053 /* This should be the entry for TLS_LDM relocation then. */
2055 BFD_ASSERT ((elf_m68k_reloc_got_type (entry->key_.type)
2057 && entry->key_.symndx == 0);
2059 ++arg->n_ldm_entries;
2063 /* This entry is for local symbol. */
2064 entry->u.s2.next = NULL;
2069 /* Assign offsets within GOT. USE_NEG_GOT_OFFSETS_P indicates if we
2070 should use negative offsets.
2071 Build list of GOT entries for global symbols along the way.
2072 SYMNDX2H is mapping from global symbol indices to actual
2074 Return offset at which next GOT should start. */
2077 elf_m68k_finalize_got_offsets (struct elf_m68k_got *got,
2078 bfd_boolean use_neg_got_offsets_p,
2079 struct elf_m68k_link_hash_entry **symndx2h,
2080 bfd_vma *final_offset, bfd_vma *n_ldm_entries)
2082 struct elf_m68k_finalize_got_offsets_arg arg_;
2083 bfd_vma offset1_[2 * R_LAST];
2084 bfd_vma offset2_[2 * R_LAST];
2086 bfd_vma start_offset;
2088 BFD_ASSERT (got->offset != (bfd_vma) -1);
2090 /* We set entry offsets relative to the .got section (and not the
2091 start of a particular GOT), so that we can use them in
2092 finish_dynamic_symbol without needing to know the GOT which they come
2095 /* Put offset1 in the middle of offset1_, same for offset2. */
2096 arg_.offset1 = offset1_ + R_LAST;
2097 arg_.offset2 = offset2_ + R_LAST;
2099 start_offset = got->offset;
2101 if (use_neg_got_offsets_p)
2102 /* Setup both negative and positive ranges for R_8, R_16 and R_32. */
2103 i = -(int) R_32 - 1;
2105 /* Setup positives ranges for R_8, R_16 and R_32. */
2108 for (; i <= (int) R_32; ++i)
2113 /* Set beginning of the range of offsets I. */
2114 arg_.offset1[i] = start_offset;
2116 /* Calculate number of slots that require I offsets. */
2117 j = (i >= 0) ? i : -i - 1;
2118 n = (j >= 1) ? got->n_slots[j - 1] : 0;
2119 n = got->n_slots[j] - n;
2121 if (use_neg_got_offsets_p && n != 0)
2124 /* We first fill the positive side of the range, so we might
2125 end up with one empty slot at that side when we can't fit
2126 whole 2-slot entry. Account for that at negative side of
2127 the interval with one additional entry. */
2130 /* When the number of slots is odd, make positive side of the
2131 range one entry bigger. */
2135 /* N is the number of slots that require I offsets.
2136 Calculate length of the range for I offsets. */
2139 /* Set end of the range. */
2140 arg_.offset2[i] = start_offset + n;
2142 start_offset = arg_.offset2[i];
2145 if (!use_neg_got_offsets_p)
2146 /* Make sure that if we try to switch to negative offsets in
2147 elf_m68k_finalize_got_offsets_1, the assert therein will catch
2149 for (i = R_8; i <= R_32; ++i)
2150 arg_.offset2[-i - 1] = arg_.offset2[i];
2152 /* Setup got->offset. offset1[R_8] is either in the middle or at the
2153 beginning of GOT depending on use_neg_got_offsets_p. */
2154 got->offset = arg_.offset1[R_8];
2156 arg_.symndx2h = symndx2h;
2157 arg_.n_ldm_entries = 0;
2159 /* Assign offsets. */
2160 htab_traverse (got->entries, elf_m68k_finalize_got_offsets_1, &arg_);
2162 /* Check offset ranges we have actually assigned. */
2163 for (i = (int) R_8; i <= (int) R_32; ++i)
2164 BFD_ASSERT (arg_.offset2[i] - arg_.offset1[i] <= 4);
2166 *final_offset = start_offset;
2167 *n_ldm_entries = arg_.n_ldm_entries;
2170 struct elf_m68k_partition_multi_got_arg
2172 /* The GOT we are adding entries to. Aka big got. */
2173 struct elf_m68k_got *current_got;
2175 /* Offset to assign the next CURRENT_GOT. */
2178 /* Context where memory should be allocated. */
2179 struct bfd_link_info *info;
2181 /* Total number of slots in the .got section.
2182 This is used to calculate size of the .got and .rela.got sections. */
2185 /* Difference in numbers of allocated slots in the .got section
2186 and necessary relocations in the .rela.got section.
2187 This is used to calculate size of the .rela.got section. */
2188 bfd_vma slots_relas_diff;
2191 bfd_boolean error_p;
2193 /* Mapping from global symndx to global symbols.
2194 This is used to build lists of got entries for global symbols. */
2195 struct elf_m68k_link_hash_entry **symndx2h;
2199 elf_m68k_partition_multi_got_2 (struct elf_m68k_partition_multi_got_arg *arg)
2201 bfd_vma n_ldm_entries;
2203 elf_m68k_finalize_got_offsets (arg->current_got,
2204 (elf_m68k_hash_table (arg->info)
2205 ->use_neg_got_offsets_p),
2207 &arg->offset, &n_ldm_entries);
2209 arg->n_slots += arg->current_got->n_slots[R_32];
2211 if (!arg->info->shared)
2212 /* If we are generating a shared object, we need to
2213 output a R_68K_RELATIVE reloc so that the dynamic
2214 linker can adjust this GOT entry. Overwise we
2215 don't need space in .rela.got for local symbols. */
2216 arg->slots_relas_diff += arg->current_got->local_n_slots;
2218 /* @LDM relocations require a 2-slot GOT entry, but only
2219 one relocation. Account for that. */
2220 arg->slots_relas_diff += n_ldm_entries;
2222 BFD_ASSERT (arg->slots_relas_diff <= arg->n_slots);
2226 /* Process a single BFD2GOT entry and either merge GOT to CURRENT_GOT
2227 or start a new CURRENT_GOT. */
2230 elf_m68k_partition_multi_got_1 (void **_entry, void *_arg)
2232 struct elf_m68k_bfd2got_entry *entry;
2233 struct elf_m68k_partition_multi_got_arg *arg;
2234 struct elf_m68k_got *got;
2235 struct elf_m68k_got diff_;
2236 struct elf_m68k_got *diff;
2238 entry = (struct elf_m68k_bfd2got_entry *) *_entry;
2239 arg = (struct elf_m68k_partition_multi_got_arg *) _arg;
2242 BFD_ASSERT (got != NULL);
2243 BFD_ASSERT (got->offset == (bfd_vma) -1);
2247 if (arg->current_got != NULL)
2248 /* Construct diff. */
2251 elf_m68k_init_got (diff);
2253 if (!elf_m68k_can_merge_gots (arg->current_got, got, arg->info, diff))
2255 if (diff->offset == 0)
2256 /* Offset set to 0 in the diff_ indicates an error. */
2258 arg->error_p = TRUE;
2262 if (elf_m68k_hash_table (arg->info)->allow_multigot_p)
2264 elf_m68k_clear_got (diff);
2265 /* Schedule to finish up current_got and start new one. */
2269 Merge GOTs no matter what. If big GOT overflows,
2270 we'll fail in relocate_section due to truncated relocations.
2272 ??? May be fail earlier? E.g., in can_merge_gots. */
2276 /* Diff of got against empty current_got is got itself. */
2278 /* Create empty current_got to put subsequent GOTs to. */
2279 arg->current_got = elf_m68k_create_empty_got (arg->info);
2280 if (arg->current_got == NULL)
2282 arg->error_p = TRUE;
2286 arg->current_got->offset = arg->offset;
2293 if (!elf_m68k_merge_gots (arg->current_got, diff, arg->info))
2295 arg->error_p = TRUE;
2299 /* Now we can free GOT. */
2300 elf_m68k_clear_got (got);
2302 entry->got = arg->current_got;
2306 /* Finish up current_got. */
2307 elf_m68k_partition_multi_got_2 (arg);
2309 /* Schedule to start a new current_got. */
2310 arg->current_got = NULL;
2313 if (!elf_m68k_partition_multi_got_1 (_entry, _arg))
2315 BFD_ASSERT (arg->error_p);
2322 elf_m68k_clear_got (diff);
2324 return arg->error_p == FALSE ? 1 : 0;
2327 /* Helper function to build symndx2h mapping. */
2330 elf_m68k_init_symndx2h_1 (struct elf_link_hash_entry *_h,
2333 struct elf_m68k_link_hash_entry *h;
2335 h = elf_m68k_hash_entry (_h);
2337 if (h->got_entry_key != 0)
2338 /* H has at least one entry in the GOT. */
2340 struct elf_m68k_partition_multi_got_arg *arg;
2342 arg = (struct elf_m68k_partition_multi_got_arg *) _arg;
2344 BFD_ASSERT (arg->symndx2h[h->got_entry_key] == NULL);
2345 arg->symndx2h[h->got_entry_key] = h;
2351 /* Merge GOTs of some BFDs, assign offsets to GOT entries and build
2352 lists of GOT entries for global symbols.
2353 Calculate sizes of .got and .rela.got sections. */
2356 elf_m68k_partition_multi_got (struct bfd_link_info *info)
2358 struct elf_m68k_multi_got *multi_got;
2359 struct elf_m68k_partition_multi_got_arg arg_;
2361 multi_got = elf_m68k_multi_got (info);
2363 arg_.current_got = NULL;
2367 arg_.slots_relas_diff = 0;
2368 arg_.error_p = FALSE;
2370 if (multi_got->bfd2got != NULL)
2372 /* Initialize symndx2h mapping. */
2374 arg_.symndx2h = bfd_zmalloc (multi_got->global_symndx
2375 * sizeof (*arg_.symndx2h));
2376 if (arg_.symndx2h == NULL)
2379 elf_link_hash_traverse (elf_hash_table (info),
2380 elf_m68k_init_symndx2h_1, &arg_);
2384 htab_traverse (multi_got->bfd2got, elf_m68k_partition_multi_got_1,
2388 free (arg_.symndx2h);
2389 arg_.symndx2h = NULL;
2394 /* Finish up last current_got. */
2395 elf_m68k_partition_multi_got_2 (&arg_);
2397 free (arg_.symndx2h);
2400 if (elf_hash_table (info)->dynobj != NULL)
2401 /* Set sizes of .got and .rela.got sections. */
2405 s = bfd_get_section_by_name (elf_hash_table (info)->dynobj, ".got");
2407 s->size = arg_.offset;
2409 BFD_ASSERT (arg_.offset == 0);
2411 BFD_ASSERT (arg_.slots_relas_diff <= arg_.n_slots);
2412 arg_.n_slots -= arg_.slots_relas_diff;
2414 s = bfd_get_section_by_name (elf_hash_table (info)->dynobj, ".rela.got");
2416 s->size = arg_.n_slots * sizeof (Elf32_External_Rela);
2418 BFD_ASSERT (arg_.n_slots == 0);
2421 BFD_ASSERT (multi_got->bfd2got == NULL);
2426 /* Specialized version of elf_m68k_get_got_entry that returns pointer
2427 to hashtable slot, thus allowing removal of entry via
2428 elf_m68k_remove_got_entry. */
2430 static struct elf_m68k_got_entry **
2431 elf_m68k_find_got_entry_ptr (struct elf_m68k_got *got,
2432 struct elf_m68k_got_entry_key *key)
2435 struct elf_m68k_got_entry entry_;
2436 struct elf_m68k_got_entry **entry_ptr;
2439 ptr = htab_find_slot (got->entries, &entry_, NO_INSERT);
2440 BFD_ASSERT (ptr != NULL);
2442 entry_ptr = (struct elf_m68k_got_entry **) ptr;
2447 /* Remove entry pointed to by ENTRY_PTR from GOT. */
2450 elf_m68k_remove_got_entry (struct elf_m68k_got *got,
2451 struct elf_m68k_got_entry **entry_ptr)
2453 struct elf_m68k_got_entry *entry;
2457 /* Check that offsets have not been finalized yet. */
2458 BFD_ASSERT (got->offset == (bfd_vma) -1);
2459 /* Check that this entry is indeed unused. */
2460 BFD_ASSERT (entry->u.s1.refcount == 0);
2462 elf_m68k_remove_got_entry_type (got, entry->key_.type);
2464 if (entry->key_.bfd != NULL)
2465 got->local_n_slots -= elf_m68k_reloc_got_n_slots (entry->key_.type);
2467 BFD_ASSERT (got->n_slots[R_32] >= got->local_n_slots);
2469 htab_clear_slot (got->entries, (void **) entry_ptr);
2472 /* Copy any information related to dynamic linking from a pre-existing
2473 symbol to a newly created symbol. Also called to copy flags and
2474 other back-end info to a weakdef, in which case the symbol is not
2475 newly created and plt/got refcounts and dynamic indices should not
2479 elf_m68k_copy_indirect_symbol (struct bfd_link_info *info,
2480 struct elf_link_hash_entry *_dir,
2481 struct elf_link_hash_entry *_ind)
2483 struct elf_m68k_link_hash_entry *dir;
2484 struct elf_m68k_link_hash_entry *ind;
2486 _bfd_elf_link_hash_copy_indirect (info, _dir, _ind);
2488 if (_ind->root.type != bfd_link_hash_indirect)
2491 dir = elf_m68k_hash_entry (_dir);
2492 ind = elf_m68k_hash_entry (_ind);
2494 /* Any absolute non-dynamic relocations against an indirect or weak
2495 definition will be against the target symbol. */
2496 _dir->non_got_ref |= _ind->non_got_ref;
2498 /* We might have a direct symbol already having entries in the GOTs.
2499 Update its key only in case indirect symbol has GOT entries and
2500 assert that both indirect and direct symbols don't have GOT entries
2501 at the same time. */
2502 if (ind->got_entry_key != 0)
2504 BFD_ASSERT (dir->got_entry_key == 0);
2505 /* Assert that GOTs aren't partioned yet. */
2506 BFD_ASSERT (ind->glist == NULL);
2508 dir->got_entry_key = ind->got_entry_key;
2509 ind->got_entry_key = 0;
2513 /* Look through the relocs for a section during the first phase, and
2514 allocate space in the global offset table or procedure linkage
2518 elf_m68k_check_relocs (abfd, info, sec, relocs)
2520 struct bfd_link_info *info;
2522 const Elf_Internal_Rela *relocs;
2525 Elf_Internal_Shdr *symtab_hdr;
2526 struct elf_link_hash_entry **sym_hashes;
2527 const Elf_Internal_Rela *rel;
2528 const Elf_Internal_Rela *rel_end;
2532 struct elf_m68k_got *got;
2534 if (info->relocatable)
2537 dynobj = elf_hash_table (info)->dynobj;
2538 symtab_hdr = &elf_tdata (abfd)->symtab_hdr;
2539 sym_hashes = elf_sym_hashes (abfd);
2547 rel_end = relocs + sec->reloc_count;
2548 for (rel = relocs; rel < rel_end; rel++)
2550 unsigned long r_symndx;
2551 struct elf_link_hash_entry *h;
2553 r_symndx = ELF32_R_SYM (rel->r_info);
2555 if (r_symndx < symtab_hdr->sh_info)
2559 h = sym_hashes[r_symndx - symtab_hdr->sh_info];
2560 while (h->root.type == bfd_link_hash_indirect
2561 || h->root.type == bfd_link_hash_warning)
2562 h = (struct elf_link_hash_entry *) h->root.u.i.link;
2565 switch (ELF32_R_TYPE (rel->r_info))
2571 && strcmp (h->root.root.string, "_GLOBAL_OFFSET_TABLE_") == 0)
2575 /* Relative GOT relocations. */
2581 /* TLS relocations. */
2583 case R_68K_TLS_GD16:
2584 case R_68K_TLS_GD32:
2585 case R_68K_TLS_LDM8:
2586 case R_68K_TLS_LDM16:
2587 case R_68K_TLS_LDM32:
2589 case R_68K_TLS_IE16:
2590 case R_68K_TLS_IE32:
2592 case R_68K_TLS_TPREL32:
2593 case R_68K_TLS_DTPREL32:
2595 if (ELF32_R_TYPE (rel->r_info) == R_68K_TLS_TPREL32
2597 /* Do the special chorus for libraries with static TLS. */
2598 info->flags |= DF_STATIC_TLS;
2600 /* This symbol requires a global offset table entry. */
2604 /* Create the .got section. */
2605 elf_hash_table (info)->dynobj = dynobj = abfd;
2606 if (!_bfd_elf_create_got_section (dynobj, info))
2612 sgot = bfd_get_section_by_name (dynobj, ".got");
2613 BFD_ASSERT (sgot != NULL);
2617 && (h != NULL || info->shared))
2619 srelgot = bfd_get_section_by_name (dynobj, ".rela.got");
2620 if (srelgot == NULL)
2622 srelgot = bfd_make_section_with_flags (dynobj,
2628 | SEC_LINKER_CREATED
2631 || !bfd_set_section_alignment (dynobj, srelgot, 2))
2638 struct elf_m68k_bfd2got_entry *bfd2got_entry;
2641 = elf_m68k_get_bfd2got_entry (elf_m68k_multi_got (info),
2642 abfd, FIND_OR_CREATE, info);
2643 if (bfd2got_entry == NULL)
2646 got = bfd2got_entry->got;
2647 BFD_ASSERT (got != NULL);
2651 struct elf_m68k_got_entry *got_entry;
2653 /* Add entry to got. */
2654 got_entry = elf_m68k_add_entry_to_got (got, h, abfd,
2655 ELF32_R_TYPE (rel->r_info),
2657 if (got_entry == NULL)
2660 if (got_entry->u.s1.refcount == 1)
2662 /* Make sure this symbol is output as a dynamic symbol. */
2665 && !h->forced_local)
2667 if (!bfd_elf_link_record_dynamic_symbol (info, h))
2678 /* This symbol requires a procedure linkage table entry. We
2679 actually build the entry in adjust_dynamic_symbol,
2680 because this might be a case of linking PIC code which is
2681 never referenced by a dynamic object, in which case we
2682 don't need to generate a procedure linkage table entry
2685 /* If this is a local symbol, we resolve it directly without
2686 creating a procedure linkage table entry. */
2697 /* This symbol requires a procedure linkage table entry. */
2701 /* It does not make sense to have this relocation for a
2702 local symbol. FIXME: does it? How to handle it if
2703 it does make sense? */
2704 bfd_set_error (bfd_error_bad_value);
2708 /* Make sure this symbol is output as a dynamic symbol. */
2709 if (h->dynindx == -1
2710 && !h->forced_local)
2712 if (!bfd_elf_link_record_dynamic_symbol (info, h))
2723 /* If we are creating a shared library and this is not a local
2724 symbol, we need to copy the reloc into the shared library.
2725 However when linking with -Bsymbolic and this is a global
2726 symbol which is defined in an object we are including in the
2727 link (i.e., DEF_REGULAR is set), then we can resolve the
2728 reloc directly. At this point we have not seen all the input
2729 files, so it is possible that DEF_REGULAR is not set now but
2730 will be set later (it is never cleared). We account for that
2731 possibility below by storing information in the
2732 pcrel_relocs_copied field of the hash table entry. */
2734 && (sec->flags & SEC_ALLOC) != 0
2737 || h->root.type == bfd_link_hash_defweak
2738 || !h->def_regular)))
2742 /* Make sure a plt entry is created for this symbol if
2743 it turns out to be a function defined by a dynamic
2755 /* Make sure a plt entry is created for this symbol if it
2756 turns out to be a function defined by a dynamic object. */
2760 /* This symbol needs a non-GOT reference. */
2764 /* If we are creating a shared library, we need to copy the
2765 reloc into the shared library. */
2767 && (sec->flags & SEC_ALLOC) != 0)
2769 /* When creating a shared object, we must copy these
2770 reloc types into the output file. We create a reloc
2771 section in dynobj and make room for this reloc. */
2774 sreloc = _bfd_elf_make_dynamic_reloc_section
2775 (sec, dynobj, 2, abfd, /*rela?*/ TRUE);
2781 if (sec->flags & SEC_READONLY
2782 /* Don't set DF_TEXTREL yet for PC relative
2783 relocations, they might be discarded later. */
2784 && !(ELF32_R_TYPE (rel->r_info) == R_68K_PC8
2785 || ELF32_R_TYPE (rel->r_info) == R_68K_PC16
2786 || ELF32_R_TYPE (rel->r_info) == R_68K_PC32))
2787 info->flags |= DF_TEXTREL;
2789 sreloc->size += sizeof (Elf32_External_Rela);
2791 /* We count the number of PC relative relocations we have
2792 entered for this symbol, so that we can discard them
2793 again if, in the -Bsymbolic case, the symbol is later
2794 defined by a regular object, or, in the normal shared
2795 case, the symbol is forced to be local. Note that this
2796 function is only called if we are using an m68kelf linker
2797 hash table, which means that h is really a pointer to an
2798 elf_m68k_link_hash_entry. */
2799 if (ELF32_R_TYPE (rel->r_info) == R_68K_PC8
2800 || ELF32_R_TYPE (rel->r_info) == R_68K_PC16
2801 || ELF32_R_TYPE (rel->r_info) == R_68K_PC32)
2803 struct elf_m68k_pcrel_relocs_copied *p;
2804 struct elf_m68k_pcrel_relocs_copied **head;
2808 struct elf_m68k_link_hash_entry *eh
2809 = elf_m68k_hash_entry (h);
2810 head = &eh->pcrel_relocs_copied;
2816 Elf_Internal_Sym *isym;
2818 isym = bfd_sym_from_r_symndx (&elf_m68k_hash_table (info)->sym_cache,
2823 s = bfd_section_from_elf_index (abfd, isym->st_shndx);
2827 vpp = &elf_section_data (s)->local_dynrel;
2828 head = (struct elf_m68k_pcrel_relocs_copied **) vpp;
2831 for (p = *head; p != NULL; p = p->next)
2832 if (p->section == sreloc)
2837 p = ((struct elf_m68k_pcrel_relocs_copied *)
2838 bfd_alloc (dynobj, (bfd_size_type) sizeof *p));
2843 p->section = sreloc;
2853 /* This relocation describes the C++ object vtable hierarchy.
2854 Reconstruct it for later use during GC. */
2855 case R_68K_GNU_VTINHERIT:
2856 if (!bfd_elf_gc_record_vtinherit (abfd, sec, h, rel->r_offset))
2860 /* This relocation describes which C++ vtable entries are actually
2861 used. Record for later use during GC. */
2862 case R_68K_GNU_VTENTRY:
2863 BFD_ASSERT (h != NULL);
2865 && !bfd_elf_gc_record_vtentry (abfd, sec, h, rel->r_addend))
2877 /* Return the section that should be marked against GC for a given
2881 elf_m68k_gc_mark_hook (asection *sec,
2882 struct bfd_link_info *info,
2883 Elf_Internal_Rela *rel,
2884 struct elf_link_hash_entry *h,
2885 Elf_Internal_Sym *sym)
2888 switch (ELF32_R_TYPE (rel->r_info))
2890 case R_68K_GNU_VTINHERIT:
2891 case R_68K_GNU_VTENTRY:
2895 return _bfd_elf_gc_mark_hook (sec, info, rel, h, sym);
2898 /* Update the got entry reference counts for the section being removed. */
2901 elf_m68k_gc_sweep_hook (bfd *abfd,
2902 struct bfd_link_info *info,
2904 const Elf_Internal_Rela *relocs)
2906 Elf_Internal_Shdr *symtab_hdr;
2907 struct elf_link_hash_entry **sym_hashes;
2908 const Elf_Internal_Rela *rel, *relend;
2912 struct elf_m68k_got *got;
2914 if (info->relocatable)
2917 dynobj = elf_hash_table (info)->dynobj;
2921 symtab_hdr = &elf_tdata (abfd)->symtab_hdr;
2922 sym_hashes = elf_sym_hashes (abfd);
2924 sgot = bfd_get_section_by_name (dynobj, ".got");
2925 srelgot = bfd_get_section_by_name (dynobj, ".rela.got");
2928 relend = relocs + sec->reloc_count;
2929 for (rel = relocs; rel < relend; rel++)
2931 unsigned long r_symndx;
2932 struct elf_link_hash_entry *h = NULL;
2934 r_symndx = ELF32_R_SYM (rel->r_info);
2935 if (r_symndx >= symtab_hdr->sh_info)
2937 h = sym_hashes[r_symndx - symtab_hdr->sh_info];
2938 while (h->root.type == bfd_link_hash_indirect
2939 || h->root.type == bfd_link_hash_warning)
2940 h = (struct elf_link_hash_entry *) h->root.u.i.link;
2943 switch (ELF32_R_TYPE (rel->r_info))
2949 && strcmp (h->root.root.string, "_GLOBAL_OFFSET_TABLE_") == 0)
2958 /* TLS relocations. */
2960 case R_68K_TLS_GD16:
2961 case R_68K_TLS_GD32:
2962 case R_68K_TLS_LDM8:
2963 case R_68K_TLS_LDM16:
2964 case R_68K_TLS_LDM32:
2966 case R_68K_TLS_IE16:
2967 case R_68K_TLS_IE32:
2969 case R_68K_TLS_TPREL32:
2970 case R_68K_TLS_DTPREL32:
2974 got = elf_m68k_get_bfd2got_entry (elf_m68k_multi_got (info),
2975 abfd, MUST_FIND, NULL)->got;
2976 BFD_ASSERT (got != NULL);
2980 struct elf_m68k_got_entry_key key_;
2981 struct elf_m68k_got_entry **got_entry_ptr;
2982 struct elf_m68k_got_entry *got_entry;
2984 elf_m68k_init_got_entry_key (&key_, h, abfd, r_symndx,
2985 ELF32_R_TYPE (rel->r_info));
2986 got_entry_ptr = elf_m68k_find_got_entry_ptr (got, &key_);
2988 got_entry = *got_entry_ptr;
2990 if (got_entry->u.s1.refcount > 0)
2992 --got_entry->u.s1.refcount;
2994 if (got_entry->u.s1.refcount == 0)
2995 /* We don't need the .got entry any more. */
2996 elf_m68k_remove_got_entry (got, got_entry_ptr);
3015 if (h->plt.refcount > 0)
3028 /* Return the type of PLT associated with OUTPUT_BFD. */
3030 static const struct elf_m68k_plt_info *
3031 elf_m68k_get_plt_info (bfd *output_bfd)
3033 unsigned int features;
3035 features = bfd_m68k_mach_to_features (bfd_get_mach (output_bfd));
3036 if (features & cpu32)
3037 return &elf_cpu32_plt_info;
3038 if (features & mcfisa_b)
3039 return &elf_isab_plt_info;
3040 if (features & mcfisa_c)
3041 return &elf_isac_plt_info;
3042 return &elf_m68k_plt_info;
3045 /* This function is called after all the input files have been read,
3046 and the input sections have been assigned to output sections.
3047 It's a convenient place to determine the PLT style. */
3050 elf_m68k_always_size_sections (bfd *output_bfd, struct bfd_link_info *info)
3052 /* Bind input BFDs to GOTs and calculate sizes of .got and .rela.got
3054 if (!elf_m68k_partition_multi_got (info))
3057 elf_m68k_hash_table (info)->plt_info = elf_m68k_get_plt_info (output_bfd);
3061 /* Adjust a symbol defined by a dynamic object and referenced by a
3062 regular object. The current definition is in some section of the
3063 dynamic object, but we're not including those sections. We have to
3064 change the definition to something the rest of the link can
3068 elf_m68k_adjust_dynamic_symbol (info, h)
3069 struct bfd_link_info *info;
3070 struct elf_link_hash_entry *h;
3072 struct elf_m68k_link_hash_table *htab;
3076 htab = elf_m68k_hash_table (info);
3077 dynobj = elf_hash_table (info)->dynobj;
3079 /* Make sure we know what is going on here. */
3080 BFD_ASSERT (dynobj != NULL
3082 || h->u.weakdef != NULL
3085 && !h->def_regular)));
3087 /* If this is a function, put it in the procedure linkage table. We
3088 will fill in the contents of the procedure linkage table later,
3089 when we know the address of the .got section. */
3090 if (h->type == STT_FUNC
3093 if ((h->plt.refcount <= 0
3094 || SYMBOL_CALLS_LOCAL (info, h)
3095 || (ELF_ST_VISIBILITY (h->other) != STV_DEFAULT
3096 && h->root.type == bfd_link_hash_undefweak))
3097 /* We must always create the plt entry if it was referenced
3098 by a PLTxxO relocation. In this case we already recorded
3099 it as a dynamic symbol. */
3100 && h->dynindx == -1)
3102 /* This case can occur if we saw a PLTxx reloc in an input
3103 file, but the symbol was never referred to by a dynamic
3104 object, or if all references were garbage collected. In
3105 such a case, we don't actually need to build a procedure
3106 linkage table, and we can just do a PCxx reloc instead. */
3107 h->plt.offset = (bfd_vma) -1;
3112 /* Make sure this symbol is output as a dynamic symbol. */
3113 if (h->dynindx == -1
3114 && !h->forced_local)
3116 if (! bfd_elf_link_record_dynamic_symbol (info, h))
3120 s = bfd_get_section_by_name (dynobj, ".plt");
3121 BFD_ASSERT (s != NULL);
3123 /* If this is the first .plt entry, make room for the special
3126 s->size = htab->plt_info->size;
3128 /* If this symbol is not defined in a regular file, and we are
3129 not generating a shared library, then set the symbol to this
3130 location in the .plt. This is required to make function
3131 pointers compare as equal between the normal executable and
3132 the shared library. */
3136 h->root.u.def.section = s;
3137 h->root.u.def.value = s->size;
3140 h->plt.offset = s->size;
3142 /* Make room for this entry. */
3143 s->size += htab->plt_info->size;
3145 /* We also need to make an entry in the .got.plt section, which
3146 will be placed in the .got section by the linker script. */
3147 s = bfd_get_section_by_name (dynobj, ".got.plt");
3148 BFD_ASSERT (s != NULL);
3151 /* We also need to make an entry in the .rela.plt section. */
3152 s = bfd_get_section_by_name (dynobj, ".rela.plt");
3153 BFD_ASSERT (s != NULL);
3154 s->size += sizeof (Elf32_External_Rela);
3159 /* Reinitialize the plt offset now that it is not used as a reference
3161 h->plt.offset = (bfd_vma) -1;
3163 /* If this is a weak symbol, and there is a real definition, the
3164 processor independent code will have arranged for us to see the
3165 real definition first, and we can just use the same value. */
3166 if (h->u.weakdef != NULL)
3168 BFD_ASSERT (h->u.weakdef->root.type == bfd_link_hash_defined
3169 || h->u.weakdef->root.type == bfd_link_hash_defweak);
3170 h->root.u.def.section = h->u.weakdef->root.u.def.section;
3171 h->root.u.def.value = h->u.weakdef->root.u.def.value;
3175 /* This is a reference to a symbol defined by a dynamic object which
3176 is not a function. */
3178 /* If we are creating a shared library, we must presume that the
3179 only references to the symbol are via the global offset table.
3180 For such cases we need not do anything here; the relocations will
3181 be handled correctly by relocate_section. */
3185 /* If there are no references to this symbol that do not use the
3186 GOT, we don't need to generate a copy reloc. */
3187 if (!h->non_got_ref)
3192 (*_bfd_error_handler) (_("dynamic variable `%s' is zero size"),
3193 h->root.root.string);
3197 /* We must allocate the symbol in our .dynbss section, which will
3198 become part of the .bss section of the executable. There will be
3199 an entry for this symbol in the .dynsym section. The dynamic
3200 object will contain position independent code, so all references
3201 from the dynamic object to this symbol will go through the global
3202 offset table. The dynamic linker will use the .dynsym entry to
3203 determine the address it must put in the global offset table, so
3204 both the dynamic object and the regular object will refer to the
3205 same memory location for the variable. */
3207 s = bfd_get_section_by_name (dynobj, ".dynbss");
3208 BFD_ASSERT (s != NULL);
3210 /* We must generate a R_68K_COPY reloc to tell the dynamic linker to
3211 copy the initial value out of the dynamic object and into the
3212 runtime process image. We need to remember the offset into the
3213 .rela.bss section we are going to use. */
3214 if ((h->root.u.def.section->flags & SEC_ALLOC) != 0)
3218 srel = bfd_get_section_by_name (dynobj, ".rela.bss");
3219 BFD_ASSERT (srel != NULL);
3220 srel->size += sizeof (Elf32_External_Rela);
3224 return _bfd_elf_adjust_dynamic_copy (h, s);
3227 /* Set the sizes of the dynamic sections. */
3230 elf_m68k_size_dynamic_sections (output_bfd, info)
3231 bfd *output_bfd ATTRIBUTE_UNUSED;
3232 struct bfd_link_info *info;
3239 dynobj = elf_hash_table (info)->dynobj;
3240 BFD_ASSERT (dynobj != NULL);
3242 if (elf_hash_table (info)->dynamic_sections_created)
3244 /* Set the contents of the .interp section to the interpreter. */
3245 if (info->executable)
3247 s = bfd_get_section_by_name (dynobj, ".interp");
3248 BFD_ASSERT (s != NULL);
3249 s->size = sizeof ELF_DYNAMIC_INTERPRETER;
3250 s->contents = (unsigned char *) ELF_DYNAMIC_INTERPRETER;
3255 /* We may have created entries in the .rela.got section.
3256 However, if we are not creating the dynamic sections, we will
3257 not actually use these entries. Reset the size of .rela.got,
3258 which will cause it to get stripped from the output file
3260 s = bfd_get_section_by_name (dynobj, ".rela.got");
3265 /* If this is a -Bsymbolic shared link, then we need to discard all
3266 PC relative relocs against symbols defined in a regular object.
3267 For the normal shared case we discard the PC relative relocs
3268 against symbols that have become local due to visibility changes.
3269 We allocated space for them in the check_relocs routine, but we
3270 will not fill them in in the relocate_section routine. */
3272 elf_link_hash_traverse (elf_hash_table (info),
3273 elf_m68k_discard_copies,
3276 /* The check_relocs and adjust_dynamic_symbol entry points have
3277 determined the sizes of the various dynamic sections. Allocate
3281 for (s = dynobj->sections; s != NULL; s = s->next)
3285 if ((s->flags & SEC_LINKER_CREATED) == 0)
3288 /* It's OK to base decisions on the section name, because none
3289 of the dynobj section names depend upon the input files. */
3290 name = bfd_get_section_name (dynobj, s);
3292 if (strcmp (name, ".plt") == 0)
3294 /* Remember whether there is a PLT. */
3297 else if (CONST_STRNEQ (name, ".rela"))
3303 /* We use the reloc_count field as a counter if we need
3304 to copy relocs into the output file. */
3308 else if (! CONST_STRNEQ (name, ".got")
3309 && strcmp (name, ".dynbss") != 0)
3311 /* It's not one of our sections, so don't allocate space. */
3317 /* If we don't need this section, strip it from the
3318 output file. This is mostly to handle .rela.bss and
3319 .rela.plt. We must create both sections in
3320 create_dynamic_sections, because they must be created
3321 before the linker maps input sections to output
3322 sections. The linker does that before
3323 adjust_dynamic_symbol is called, and it is that
3324 function which decides whether anything needs to go
3325 into these sections. */
3326 s->flags |= SEC_EXCLUDE;
3330 if ((s->flags & SEC_HAS_CONTENTS) == 0)
3333 /* Allocate memory for the section contents. */
3334 /* FIXME: This should be a call to bfd_alloc not bfd_zalloc.
3335 Unused entries should be reclaimed before the section's contents
3336 are written out, but at the moment this does not happen. Thus in
3337 order to prevent writing out garbage, we initialise the section's
3338 contents to zero. */
3339 s->contents = (bfd_byte *) bfd_zalloc (dynobj, s->size);
3340 if (s->contents == NULL)
3344 if (elf_hash_table (info)->dynamic_sections_created)
3346 /* Add some entries to the .dynamic section. We fill in the
3347 values later, in elf_m68k_finish_dynamic_sections, but we
3348 must add the entries now so that we get the correct size for
3349 the .dynamic section. The DT_DEBUG entry is filled in by the
3350 dynamic linker and used by the debugger. */
3351 #define add_dynamic_entry(TAG, VAL) \
3352 _bfd_elf_add_dynamic_entry (info, TAG, VAL)
3356 if (!add_dynamic_entry (DT_DEBUG, 0))
3362 if (!add_dynamic_entry (DT_PLTGOT, 0)
3363 || !add_dynamic_entry (DT_PLTRELSZ, 0)
3364 || !add_dynamic_entry (DT_PLTREL, DT_RELA)
3365 || !add_dynamic_entry (DT_JMPREL, 0))
3371 if (!add_dynamic_entry (DT_RELA, 0)
3372 || !add_dynamic_entry (DT_RELASZ, 0)
3373 || !add_dynamic_entry (DT_RELAENT, sizeof (Elf32_External_Rela)))
3377 if ((info->flags & DF_TEXTREL) != 0)
3379 if (!add_dynamic_entry (DT_TEXTREL, 0))
3383 #undef add_dynamic_entry
3388 /* This function is called via elf_link_hash_traverse if we are
3389 creating a shared object. In the -Bsymbolic case it discards the
3390 space allocated to copy PC relative relocs against symbols which
3391 are defined in regular objects. For the normal shared case, it
3392 discards space for pc-relative relocs that have become local due to
3393 symbol visibility changes. We allocated space for them in the
3394 check_relocs routine, but we won't fill them in in the
3395 relocate_section routine.
3397 We also check whether any of the remaining relocations apply
3398 against a readonly section, and set the DF_TEXTREL flag in this
3402 elf_m68k_discard_copies (h, inf)
3403 struct elf_link_hash_entry *h;
3406 struct bfd_link_info *info = (struct bfd_link_info *) inf;
3407 struct elf_m68k_pcrel_relocs_copied *s;
3409 if (h->root.type == bfd_link_hash_warning)
3410 h = (struct elf_link_hash_entry *) h->root.u.i.link;
3412 if (!SYMBOL_CALLS_LOCAL (info, h))
3414 if ((info->flags & DF_TEXTREL) == 0)
3416 /* Look for relocations against read-only sections. */
3417 for (s = elf_m68k_hash_entry (h)->pcrel_relocs_copied;
3420 if ((s->section->flags & SEC_READONLY) != 0)
3422 info->flags |= DF_TEXTREL;
3430 for (s = elf_m68k_hash_entry (h)->pcrel_relocs_copied;
3433 s->section->size -= s->count * sizeof (Elf32_External_Rela);
3439 /* Install relocation RELA. */
3442 elf_m68k_install_rela (bfd *output_bfd,
3444 Elf_Internal_Rela *rela)
3448 loc = srela->contents;
3449 loc += srela->reloc_count++ * sizeof (Elf32_External_Rela);
3450 bfd_elf32_swap_reloca_out (output_bfd, rela, loc);
3453 /* Find the base offsets for thread-local storage in this object,
3454 for GD/LD and IE/LE respectively. */
3456 #define DTP_OFFSET 0x8000
3457 #define TP_OFFSET 0x7000
3460 dtpoff_base (struct bfd_link_info *info)
3462 /* If tls_sec is NULL, we should have signalled an error already. */
3463 if (elf_hash_table (info)->tls_sec == NULL)
3465 return elf_hash_table (info)->tls_sec->vma + DTP_OFFSET;
3469 tpoff_base (struct bfd_link_info *info)
3471 /* If tls_sec is NULL, we should have signalled an error already. */
3472 if (elf_hash_table (info)->tls_sec == NULL)
3474 return elf_hash_table (info)->tls_sec->vma + TP_OFFSET;
3477 /* Output necessary relocation to handle a symbol during static link.
3478 This function is called from elf_m68k_relocate_section. */
3481 elf_m68k_init_got_entry_static (struct bfd_link_info *info,
3483 enum elf_m68k_reloc_type r_type,
3485 bfd_vma got_entry_offset,
3488 switch (elf_m68k_reloc_got_type (r_type))
3491 bfd_put_32 (output_bfd, relocation, sgot->contents + got_entry_offset);
3494 case R_68K_TLS_GD32:
3495 /* We know the offset within the module,
3496 put it into the second GOT slot. */
3497 bfd_put_32 (output_bfd, relocation - dtpoff_base (info),
3498 sgot->contents + got_entry_offset + 4);
3501 case R_68K_TLS_LDM32:
3502 /* Mark it as belonging to module 1, the executable. */
3503 bfd_put_32 (output_bfd, 1, sgot->contents + got_entry_offset);
3506 case R_68K_TLS_IE32:
3507 bfd_put_32 (output_bfd, relocation - tpoff_base (info),
3508 sgot->contents + got_entry_offset);
3516 /* Output necessary relocation to handle a local symbol
3517 during dynamic link.
3518 This function is called either from elf_m68k_relocate_section
3519 or from elf_m68k_finish_dynamic_symbol. */
3522 elf_m68k_init_got_entry_local_shared (struct bfd_link_info *info,
3524 enum elf_m68k_reloc_type r_type,
3526 bfd_vma got_entry_offset,
3530 Elf_Internal_Rela outrel;
3532 switch (elf_m68k_reloc_got_type (r_type))
3535 /* Emit RELATIVE relocation to initialize GOT slot
3537 outrel.r_info = ELF32_R_INFO (0, R_68K_RELATIVE);
3538 outrel.r_addend = relocation;
3541 case R_68K_TLS_GD32:
3542 /* We know the offset within the module,
3543 put it into the second GOT slot. */
3544 bfd_put_32 (output_bfd, relocation - dtpoff_base (info),
3545 sgot->contents + got_entry_offset + 4);
3548 case R_68K_TLS_LDM32:
3549 /* We don't know the module number,
3550 create a relocation for it. */
3551 outrel.r_info = ELF32_R_INFO (0, R_68K_TLS_DTPMOD32);
3552 outrel.r_addend = 0;
3555 case R_68K_TLS_IE32:
3556 /* Emit TPREL relocation to initialize GOT slot
3558 outrel.r_info = ELF32_R_INFO (0, R_68K_TLS_TPREL32);
3559 outrel.r_addend = relocation - elf_hash_table (info)->tls_sec->vma;
3566 /* Offset of the GOT entry. */
3567 outrel.r_offset = (sgot->output_section->vma
3568 + sgot->output_offset
3569 + got_entry_offset);
3571 /* Install one of the above relocations. */
3572 elf_m68k_install_rela (output_bfd, srela, &outrel);
3574 bfd_put_32 (output_bfd, outrel.r_addend, sgot->contents + got_entry_offset);
3577 /* Relocate an M68K ELF section. */
3580 elf_m68k_relocate_section (output_bfd, info, input_bfd, input_section,
3581 contents, relocs, local_syms, local_sections)
3583 struct bfd_link_info *info;
3585 asection *input_section;
3587 Elf_Internal_Rela *relocs;
3588 Elf_Internal_Sym *local_syms;
3589 asection **local_sections;
3592 Elf_Internal_Shdr *symtab_hdr;
3593 struct elf_link_hash_entry **sym_hashes;
3598 struct elf_m68k_got *got;
3599 Elf_Internal_Rela *rel;
3600 Elf_Internal_Rela *relend;
3602 dynobj = elf_hash_table (info)->dynobj;
3603 symtab_hdr = &elf_tdata (input_bfd)->symtab_hdr;
3604 sym_hashes = elf_sym_hashes (input_bfd);
3614 relend = relocs + input_section->reloc_count;
3615 for (; rel < relend; rel++)
3618 reloc_howto_type *howto;
3619 unsigned long r_symndx;
3620 struct elf_link_hash_entry *h;
3621 Elf_Internal_Sym *sym;
3624 bfd_boolean unresolved_reloc;
3625 bfd_reloc_status_type r;
3627 r_type = ELF32_R_TYPE (rel->r_info);
3628 if (r_type < 0 || r_type >= (int) R_68K_max)
3630 bfd_set_error (bfd_error_bad_value);
3633 howto = howto_table + r_type;
3635 r_symndx = ELF32_R_SYM (rel->r_info);
3640 unresolved_reloc = FALSE;
3642 if (r_symndx < symtab_hdr->sh_info)
3644 sym = local_syms + r_symndx;
3645 sec = local_sections[r_symndx];
3646 relocation = _bfd_elf_rela_local_sym (output_bfd, sym, &sec, rel);
3652 RELOC_FOR_GLOBAL_SYMBOL (info, input_bfd, input_section, rel,
3653 r_symndx, symtab_hdr, sym_hashes,
3655 unresolved_reloc, warned);
3658 if (sec != NULL && elf_discarded_section (sec))
3660 /* For relocs against symbols from removed linkonce sections,
3661 or sections discarded by a linker script, we just want the
3662 section contents zeroed. Avoid any special processing. */
3663 _bfd_clear_contents (howto, input_bfd, contents + rel->r_offset);
3669 if (info->relocatable)
3677 /* Relocation is to the address of the entry for this symbol
3678 in the global offset table. */
3680 && strcmp (h->root.root.string, "_GLOBAL_OFFSET_TABLE_") == 0)
3682 if (elf_m68k_hash_table (info)->local_gp_p)
3684 bfd_vma sgot_output_offset;
3689 sgot = bfd_get_section_by_name (dynobj, ".got");
3692 sgot_output_offset = sgot->output_offset;
3694 /* In this case we have a reference to
3695 _GLOBAL_OFFSET_TABLE_, but the GOT itself is
3697 ??? Issue a warning? */
3698 sgot_output_offset = 0;
3701 sgot_output_offset = sgot->output_offset;
3705 struct elf_m68k_bfd2got_entry *bfd2got_entry;
3708 = elf_m68k_get_bfd2got_entry (elf_m68k_multi_got (info),
3709 input_bfd, SEARCH, NULL);
3711 if (bfd2got_entry != NULL)
3713 got = bfd2got_entry->got;
3714 BFD_ASSERT (got != NULL);
3716 got_offset = got->offset;
3719 /* In this case we have a reference to
3720 _GLOBAL_OFFSET_TABLE_, but no other references
3721 accessing any GOT entries.
3722 ??? Issue a warning? */
3726 got_offset = got->offset;
3728 /* Adjust GOT pointer to point to the GOT
3729 assigned to input_bfd. */
3730 rel->r_addend += sgot_output_offset + got_offset;
3733 BFD_ASSERT (got == NULL || got->offset == 0);
3742 case R_68K_TLS_LDM32:
3743 case R_68K_TLS_LDM16:
3744 case R_68K_TLS_LDM8:
3747 case R_68K_TLS_GD16:
3748 case R_68K_TLS_GD32:
3751 case R_68K_TLS_IE16:
3752 case R_68K_TLS_IE32:
3754 /* Relocation is the offset of the entry for this symbol in
3755 the global offset table. */
3758 struct elf_m68k_got_entry_key key_;
3764 sgot = bfd_get_section_by_name (dynobj, ".got");
3765 BFD_ASSERT (sgot != NULL);
3770 got = elf_m68k_get_bfd2got_entry (elf_m68k_multi_got (info),
3771 input_bfd, MUST_FIND,
3773 BFD_ASSERT (got != NULL);
3776 /* Get GOT offset for this symbol. */
3777 elf_m68k_init_got_entry_key (&key_, h, input_bfd, r_symndx,
3779 off_ptr = &elf_m68k_get_got_entry (got, &key_, MUST_FIND,
3783 /* The offset must always be a multiple of 4. We use
3784 the least significant bit to record whether we have
3785 already generated the necessary reloc. */
3791 /* @TLSLDM relocations are bounded to the module, in
3792 which the symbol is defined -- not to the symbol
3794 && elf_m68k_reloc_got_type (r_type) != R_68K_TLS_LDM32)
3798 dyn = elf_hash_table (info)->dynamic_sections_created;
3799 if (!WILL_CALL_FINISH_DYNAMIC_SYMBOL (dyn, info->shared, h)
3801 && SYMBOL_REFERENCES_LOCAL (info, h))
3802 || (ELF_ST_VISIBILITY (h->other)
3803 && h->root.type == bfd_link_hash_undefweak))
3805 /* This is actually a static link, or it is a
3806 -Bsymbolic link and the symbol is defined
3807 locally, or the symbol was forced to be local
3808 because of a version file. We must initialize
3809 this entry in the global offset table. Since
3810 the offset must always be a multiple of 4, we
3811 use the least significant bit to record whether
3812 we have initialized it already.
3814 When doing a dynamic link, we create a .rela.got
3815 relocation entry to initialize the value. This
3816 is done in the finish_dynamic_symbol routine. */
3818 elf_m68k_init_got_entry_static (info,
3828 unresolved_reloc = FALSE;
3830 else if (info->shared) /* && h == NULL */
3831 /* Process local symbol during dynamic link. */
3835 srela = bfd_get_section_by_name (dynobj, ".rela.got");
3836 BFD_ASSERT (srela != NULL);
3839 elf_m68k_init_got_entry_local_shared (info,
3849 else /* h == NULL && !info->shared */
3851 elf_m68k_init_got_entry_static (info,
3862 /* We don't use elf_m68k_reloc_got_type in the condition below
3863 because this is the only place where difference between
3864 R_68K_GOTx and R_68K_GOTxO relocations matters. */
3865 if (r_type == R_68K_GOT32O
3866 || r_type == R_68K_GOT16O
3867 || r_type == R_68K_GOT8O
3868 || elf_m68k_reloc_got_type (r_type) == R_68K_TLS_GD32
3869 || elf_m68k_reloc_got_type (r_type) == R_68K_TLS_LDM32
3870 || elf_m68k_reloc_got_type (r_type) == R_68K_TLS_IE32)
3872 /* GOT pointer is adjusted to point to the start/middle
3873 of local GOT. Adjust the offset accordingly. */
3874 BFD_ASSERT (elf_m68k_hash_table (info)->use_neg_got_offsets_p
3875 || off >= got->offset);
3877 if (elf_m68k_hash_table (info)->local_gp_p)
3878 relocation = off - got->offset;
3881 BFD_ASSERT (got->offset == 0);
3882 relocation = sgot->output_offset + off;
3885 /* This relocation does not use the addend. */
3889 relocation = (sgot->output_section->vma + sgot->output_offset
3894 case R_68K_TLS_LDO32:
3895 case R_68K_TLS_LDO16:
3896 case R_68K_TLS_LDO8:
3897 relocation -= dtpoff_base (info);
3900 case R_68K_TLS_LE32:
3901 case R_68K_TLS_LE16:
3905 (*_bfd_error_handler)
3906 (_("%B(%A+0x%lx): R_68K_TLS_LE32 relocation not permitted "
3907 "in shared object"),
3908 input_bfd, input_section, (long) rel->r_offset, howto->name);
3913 relocation -= tpoff_base (info);
3920 /* Relocation is to the entry for this symbol in the
3921 procedure linkage table. */
3923 /* Resolve a PLTxx reloc against a local symbol directly,
3924 without using the procedure linkage table. */
3928 if (h->plt.offset == (bfd_vma) -1
3929 || !elf_hash_table (info)->dynamic_sections_created)
3931 /* We didn't make a PLT entry for this symbol. This
3932 happens when statically linking PIC code, or when
3933 using -Bsymbolic. */
3939 splt = bfd_get_section_by_name (dynobj, ".plt");
3940 BFD_ASSERT (splt != NULL);
3943 relocation = (splt->output_section->vma
3944 + splt->output_offset
3946 unresolved_reloc = FALSE;
3952 /* Relocation is the offset of the entry for this symbol in
3953 the procedure linkage table. */
3954 BFD_ASSERT (h != NULL && h->plt.offset != (bfd_vma) -1);
3958 splt = bfd_get_section_by_name (dynobj, ".plt");
3959 BFD_ASSERT (splt != NULL);
3962 relocation = h->plt.offset;
3963 unresolved_reloc = FALSE;
3965 /* This relocation does not use the addend. */
3978 && (input_section->flags & SEC_ALLOC) != 0
3980 || ELF_ST_VISIBILITY (h->other) == STV_DEFAULT
3981 || h->root.type != bfd_link_hash_undefweak)
3982 && ((r_type != R_68K_PC8
3983 && r_type != R_68K_PC16
3984 && r_type != R_68K_PC32)
3985 || !SYMBOL_CALLS_LOCAL (info, h)))
3987 Elf_Internal_Rela outrel;
3989 bfd_boolean skip, relocate;
3991 /* When generating a shared object, these relocations
3992 are copied into the output file to be resolved at run
3999 _bfd_elf_section_offset (output_bfd, info, input_section,
4001 if (outrel.r_offset == (bfd_vma) -1)
4003 else if (outrel.r_offset == (bfd_vma) -2)
4004 skip = TRUE, relocate = TRUE;
4005 outrel.r_offset += (input_section->output_section->vma
4006 + input_section->output_offset);
4009 memset (&outrel, 0, sizeof outrel);
4012 && (r_type == R_68K_PC8
4013 || r_type == R_68K_PC16
4014 || r_type == R_68K_PC32
4017 || !h->def_regular))
4019 outrel.r_info = ELF32_R_INFO (h->dynindx, r_type);
4020 outrel.r_addend = rel->r_addend;
4024 /* This symbol is local, or marked to become local. */
4025 outrel.r_addend = relocation + rel->r_addend;
4027 if (r_type == R_68K_32)
4030 outrel.r_info = ELF32_R_INFO (0, R_68K_RELATIVE);
4036 if (bfd_is_abs_section (sec))
4038 else if (sec == NULL || sec->owner == NULL)
4040 bfd_set_error (bfd_error_bad_value);
4047 /* We are turning this relocation into one
4048 against a section symbol. It would be
4049 proper to subtract the symbol's value,
4050 osec->vma, from the emitted reloc addend,
4051 but ld.so expects buggy relocs. */
4052 osec = sec->output_section;
4053 indx = elf_section_data (osec)->dynindx;
4056 struct elf_link_hash_table *htab;
4057 htab = elf_hash_table (info);
4058 osec = htab->text_index_section;
4059 indx = elf_section_data (osec)->dynindx;
4061 BFD_ASSERT (indx != 0);
4064 outrel.r_info = ELF32_R_INFO (indx, r_type);
4068 sreloc = elf_section_data (input_section)->sreloc;
4072 loc = sreloc->contents;
4073 loc += sreloc->reloc_count++ * sizeof (Elf32_External_Rela);
4074 bfd_elf32_swap_reloca_out (output_bfd, &outrel, loc);
4076 /* This reloc will be computed at runtime, so there's no
4077 need to do anything now, except for R_68K_32
4078 relocations that have been turned into
4086 case R_68K_GNU_VTINHERIT:
4087 case R_68K_GNU_VTENTRY:
4088 /* These are no-ops in the end. */
4095 /* Dynamic relocs are not propagated for SEC_DEBUGGING sections
4096 because such sections are not SEC_ALLOC and thus ld.so will
4097 not process them. */
4098 if (unresolved_reloc
4099 && !((input_section->flags & SEC_DEBUGGING) != 0
4102 (*_bfd_error_handler)
4103 (_("%B(%A+0x%lx): unresolvable %s relocation against symbol `%s'"),
4106 (long) rel->r_offset,
4108 h->root.root.string);
4113 && r_type != R_68K_NONE
4115 || h->root.type == bfd_link_hash_defined
4116 || h->root.type == bfd_link_hash_defweak))
4120 sym_type = (sym != NULL) ? ELF32_ST_TYPE (sym->st_info) : h->type;
4122 if (elf_m68k_reloc_tls_p (r_type) != (sym_type == STT_TLS))
4127 name = h->root.root.string;
4130 name = (bfd_elf_string_from_elf_section
4131 (input_bfd, symtab_hdr->sh_link, sym->st_name));
4132 if (name == NULL || *name == '\0')
4133 name = bfd_section_name (input_bfd, sec);
4136 (*_bfd_error_handler)
4137 ((sym_type == STT_TLS
4138 ? _("%B(%A+0x%lx): %s used with TLS symbol %s")
4139 : _("%B(%A+0x%lx): %s used with non-TLS symbol %s")),
4142 (long) rel->r_offset,
4148 r = _bfd_final_link_relocate (howto, input_bfd, input_section,
4149 contents, rel->r_offset,
4150 relocation, rel->r_addend);
4152 if (r != bfd_reloc_ok)
4157 name = h->root.root.string;
4160 name = bfd_elf_string_from_elf_section (input_bfd,
4161 symtab_hdr->sh_link,
4166 name = bfd_section_name (input_bfd, sec);
4169 if (r == bfd_reloc_overflow)
4171 if (!(info->callbacks->reloc_overflow
4172 (info, (h ? &h->root : NULL), name, howto->name,
4173 (bfd_vma) 0, input_bfd, input_section,
4179 (*_bfd_error_handler)
4180 (_("%B(%A+0x%lx): reloc against `%s': error %d"),
4181 input_bfd, input_section,
4182 (long) rel->r_offset, name, (int) r);
4191 /* Install an M_68K_PC32 relocation against VALUE at offset OFFSET
4192 into section SEC. */
4195 elf_m68k_install_pc32 (asection *sec, bfd_vma offset, bfd_vma value)
4197 /* Make VALUE PC-relative. */
4198 value -= sec->output_section->vma + offset;
4200 /* Apply any in-place addend. */
4201 value += bfd_get_32 (sec->owner, sec->contents + offset);
4203 bfd_put_32 (sec->owner, value, sec->contents + offset);
4206 /* Finish up dynamic symbol handling. We set the contents of various
4207 dynamic sections here. */
4210 elf_m68k_finish_dynamic_symbol (output_bfd, info, h, sym)
4212 struct bfd_link_info *info;
4213 struct elf_link_hash_entry *h;
4214 Elf_Internal_Sym *sym;
4218 dynobj = elf_hash_table (info)->dynobj;
4220 if (h->plt.offset != (bfd_vma) -1)
4222 const struct elf_m68k_plt_info *plt_info;
4228 Elf_Internal_Rela rela;
4231 /* This symbol has an entry in the procedure linkage table. Set
4234 BFD_ASSERT (h->dynindx != -1);
4236 plt_info = elf_m68k_hash_table (info)->plt_info;
4237 splt = bfd_get_section_by_name (dynobj, ".plt");
4238 sgot = bfd_get_section_by_name (dynobj, ".got.plt");
4239 srela = bfd_get_section_by_name (dynobj, ".rela.plt");
4240 BFD_ASSERT (splt != NULL && sgot != NULL && srela != NULL);
4242 /* Get the index in the procedure linkage table which
4243 corresponds to this symbol. This is the index of this symbol
4244 in all the symbols for which we are making plt entries. The
4245 first entry in the procedure linkage table is reserved. */
4246 plt_index = (h->plt.offset / plt_info->size) - 1;
4248 /* Get the offset into the .got table of the entry that
4249 corresponds to this function. Each .got entry is 4 bytes.
4250 The first three are reserved. */
4251 got_offset = (plt_index + 3) * 4;
4253 memcpy (splt->contents + h->plt.offset,
4254 plt_info->symbol_entry,
4257 elf_m68k_install_pc32 (splt, h->plt.offset + plt_info->symbol_relocs.got,
4258 (sgot->output_section->vma
4259 + sgot->output_offset
4262 bfd_put_32 (output_bfd, plt_index * sizeof (Elf32_External_Rela),
4265 + plt_info->symbol_resolve_entry + 2);
4267 elf_m68k_install_pc32 (splt, h->plt.offset + plt_info->symbol_relocs.plt,
4268 splt->output_section->vma);
4270 /* Fill in the entry in the global offset table. */
4271 bfd_put_32 (output_bfd,
4272 (splt->output_section->vma
4273 + splt->output_offset
4275 + plt_info->symbol_resolve_entry),
4276 sgot->contents + got_offset);
4278 /* Fill in the entry in the .rela.plt section. */
4279 rela.r_offset = (sgot->output_section->vma
4280 + sgot->output_offset
4282 rela.r_info = ELF32_R_INFO (h->dynindx, R_68K_JMP_SLOT);
4284 loc = srela->contents + plt_index * sizeof (Elf32_External_Rela);
4285 bfd_elf32_swap_reloca_out (output_bfd, &rela, loc);
4287 if (!h->def_regular)
4289 /* Mark the symbol as undefined, rather than as defined in
4290 the .plt section. Leave the value alone. */
4291 sym->st_shndx = SHN_UNDEF;
4295 if (elf_m68k_hash_entry (h)->glist != NULL)
4299 struct elf_m68k_got_entry *got_entry;
4301 /* This symbol has an entry in the global offset table. Set it
4304 sgot = bfd_get_section_by_name (dynobj, ".got");
4305 srela = bfd_get_section_by_name (dynobj, ".rela.got");
4306 BFD_ASSERT (sgot != NULL && srela != NULL);
4308 got_entry = elf_m68k_hash_entry (h)->glist;
4310 while (got_entry != NULL)
4312 enum elf_m68k_reloc_type r_type;
4313 bfd_vma got_entry_offset;
4315 r_type = got_entry->key_.type;
4316 got_entry_offset = got_entry->u.s2.offset &~ (bfd_vma) 1;
4318 /* If this is a -Bsymbolic link, and the symbol is defined
4319 locally, we just want to emit a RELATIVE reloc. Likewise if
4320 the symbol was forced to be local because of a version file.
4321 The entry in the global offset table already have been
4322 initialized in the relocate_section function. */
4324 && SYMBOL_REFERENCES_LOCAL (info, h))
4328 relocation = bfd_get_signed_32 (output_bfd,
4330 + got_entry_offset));
4333 switch (elf_m68k_reloc_got_type (r_type))
4336 case R_68K_TLS_LDM32:
4339 case R_68K_TLS_GD32:
4340 relocation += dtpoff_base (info);
4343 case R_68K_TLS_IE32:
4344 relocation += tpoff_base (info);
4351 elf_m68k_init_got_entry_local_shared (info,
4361 Elf_Internal_Rela rela;
4363 /* Put zeros to GOT slots that will be initialized
4368 n_slots = elf_m68k_reloc_got_n_slots (got_entry->key_.type);
4370 bfd_put_32 (output_bfd, (bfd_vma) 0,
4371 (sgot->contents + got_entry_offset
4376 rela.r_offset = (sgot->output_section->vma
4377 + sgot->output_offset
4378 + got_entry_offset);
4380 switch (elf_m68k_reloc_got_type (r_type))
4383 rela.r_info = ELF32_R_INFO (h->dynindx, R_68K_GLOB_DAT);
4384 elf_m68k_install_rela (output_bfd, srela, &rela);
4387 case R_68K_TLS_GD32:
4388 rela.r_info = ELF32_R_INFO (h->dynindx, R_68K_TLS_DTPMOD32);
4389 elf_m68k_install_rela (output_bfd, srela, &rela);
4392 rela.r_info = ELF32_R_INFO (h->dynindx, R_68K_TLS_DTPREL32);
4393 elf_m68k_install_rela (output_bfd, srela, &rela);
4396 case R_68K_TLS_IE32:
4397 rela.r_info = ELF32_R_INFO (h->dynindx, R_68K_TLS_TPREL32);
4398 elf_m68k_install_rela (output_bfd, srela, &rela);
4407 got_entry = got_entry->u.s2.next;
4414 Elf_Internal_Rela rela;
4417 /* This symbol needs a copy reloc. Set it up. */
4419 BFD_ASSERT (h->dynindx != -1
4420 && (h->root.type == bfd_link_hash_defined
4421 || h->root.type == bfd_link_hash_defweak));
4423 s = bfd_get_section_by_name (h->root.u.def.section->owner,
4425 BFD_ASSERT (s != NULL);
4427 rela.r_offset = (h->root.u.def.value
4428 + h->root.u.def.section->output_section->vma
4429 + h->root.u.def.section->output_offset);
4430 rela.r_info = ELF32_R_INFO (h->dynindx, R_68K_COPY);
4432 loc = s->contents + s->reloc_count++ * sizeof (Elf32_External_Rela);
4433 bfd_elf32_swap_reloca_out (output_bfd, &rela, loc);
4436 /* Mark _DYNAMIC and _GLOBAL_OFFSET_TABLE_ as absolute. */
4437 if (strcmp (h->root.root.string, "_DYNAMIC") == 0
4438 || h == elf_hash_table (info)->hgot)
4439 sym->st_shndx = SHN_ABS;
4444 /* Finish up the dynamic sections. */
4447 elf_m68k_finish_dynamic_sections (output_bfd, info)
4449 struct bfd_link_info *info;
4455 dynobj = elf_hash_table (info)->dynobj;
4457 sgot = bfd_get_section_by_name (dynobj, ".got.plt");
4458 BFD_ASSERT (sgot != NULL);
4459 sdyn = bfd_get_section_by_name (dynobj, ".dynamic");
4461 if (elf_hash_table (info)->dynamic_sections_created)
4464 Elf32_External_Dyn *dyncon, *dynconend;
4466 splt = bfd_get_section_by_name (dynobj, ".plt");
4467 BFD_ASSERT (splt != NULL && sdyn != NULL);
4469 dyncon = (Elf32_External_Dyn *) sdyn->contents;
4470 dynconend = (Elf32_External_Dyn *) (sdyn->contents + sdyn->size);
4471 for (; dyncon < dynconend; dyncon++)
4473 Elf_Internal_Dyn dyn;
4477 bfd_elf32_swap_dyn_in (dynobj, dyncon, &dyn);
4490 s = bfd_get_section_by_name (output_bfd, name);
4491 BFD_ASSERT (s != NULL);
4492 dyn.d_un.d_ptr = s->vma;
4493 bfd_elf32_swap_dyn_out (output_bfd, &dyn, dyncon);
4497 s = bfd_get_section_by_name (output_bfd, ".rela.plt");
4498 BFD_ASSERT (s != NULL);
4499 dyn.d_un.d_val = s->size;
4500 bfd_elf32_swap_dyn_out (output_bfd, &dyn, dyncon);
4504 /* The procedure linkage table relocs (DT_JMPREL) should
4505 not be included in the overall relocs (DT_RELA).
4506 Therefore, we override the DT_RELASZ entry here to
4507 make it not include the JMPREL relocs. Since the
4508 linker script arranges for .rela.plt to follow all
4509 other relocation sections, we don't have to worry
4510 about changing the DT_RELA entry. */
4511 s = bfd_get_section_by_name (output_bfd, ".rela.plt");
4513 dyn.d_un.d_val -= s->size;
4514 bfd_elf32_swap_dyn_out (output_bfd, &dyn, dyncon);
4519 /* Fill in the first entry in the procedure linkage table. */
4522 const struct elf_m68k_plt_info *plt_info;
4524 plt_info = elf_m68k_hash_table (info)->plt_info;
4525 memcpy (splt->contents, plt_info->plt0_entry, plt_info->size);
4527 elf_m68k_install_pc32 (splt, plt_info->plt0_relocs.got4,
4528 (sgot->output_section->vma
4529 + sgot->output_offset
4532 elf_m68k_install_pc32 (splt, plt_info->plt0_relocs.got8,
4533 (sgot->output_section->vma
4534 + sgot->output_offset
4537 elf_section_data (splt->output_section)->this_hdr.sh_entsize
4542 /* Fill in the first three entries in the global offset table. */
4546 bfd_put_32 (output_bfd, (bfd_vma) 0, sgot->contents);
4548 bfd_put_32 (output_bfd,
4549 sdyn->output_section->vma + sdyn->output_offset,
4551 bfd_put_32 (output_bfd, (bfd_vma) 0, sgot->contents + 4);
4552 bfd_put_32 (output_bfd, (bfd_vma) 0, sgot->contents + 8);
4555 elf_section_data (sgot->output_section)->this_hdr.sh_entsize = 4;
4560 /* Given a .data section and a .emreloc in-memory section, store
4561 relocation information into the .emreloc section which can be
4562 used at runtime to relocate the section. This is called by the
4563 linker when the --embedded-relocs switch is used. This is called
4564 after the add_symbols entry point has been called for all the
4565 objects, and before the final_link entry point is called. */
4568 bfd_m68k_elf32_create_embedded_relocs (abfd, info, datasec, relsec, errmsg)
4570 struct bfd_link_info *info;
4575 Elf_Internal_Shdr *symtab_hdr;
4576 Elf_Internal_Sym *isymbuf = NULL;
4577 Elf_Internal_Rela *internal_relocs = NULL;
4578 Elf_Internal_Rela *irel, *irelend;
4582 BFD_ASSERT (! info->relocatable);
4586 if (datasec->reloc_count == 0)
4589 symtab_hdr = &elf_tdata (abfd)->symtab_hdr;
4591 /* Get a copy of the native relocations. */
4592 internal_relocs = (_bfd_elf_link_read_relocs
4593 (abfd, datasec, (PTR) NULL, (Elf_Internal_Rela *) NULL,
4594 info->keep_memory));
4595 if (internal_relocs == NULL)
4598 amt = (bfd_size_type) datasec->reloc_count * 12;
4599 relsec->contents = (bfd_byte *) bfd_alloc (abfd, amt);
4600 if (relsec->contents == NULL)
4603 p = relsec->contents;
4605 irelend = internal_relocs + datasec->reloc_count;
4606 for (irel = internal_relocs; irel < irelend; irel++, p += 12)
4608 asection *targetsec;
4610 /* We are going to write a four byte longword into the runtime
4611 reloc section. The longword will be the address in the data
4612 section which must be relocated. It is followed by the name
4613 of the target section NUL-padded or truncated to 8
4616 /* We can only relocate absolute longword relocs at run time. */
4617 if (ELF32_R_TYPE (irel->r_info) != (int) R_68K_32)
4619 *errmsg = _("unsupported reloc type");
4620 bfd_set_error (bfd_error_bad_value);
4624 /* Get the target section referred to by the reloc. */
4625 if (ELF32_R_SYM (irel->r_info) < symtab_hdr->sh_info)
4627 /* A local symbol. */
4628 Elf_Internal_Sym *isym;
4630 /* Read this BFD's local symbols if we haven't done so already. */
4631 if (isymbuf == NULL)
4633 isymbuf = (Elf_Internal_Sym *) symtab_hdr->contents;
4634 if (isymbuf == NULL)
4635 isymbuf = bfd_elf_get_elf_syms (abfd, symtab_hdr,
4636 symtab_hdr->sh_info, 0,
4638 if (isymbuf == NULL)
4642 isym = isymbuf + ELF32_R_SYM (irel->r_info);
4643 targetsec = bfd_section_from_elf_index (abfd, isym->st_shndx);
4648 struct elf_link_hash_entry *h;
4650 /* An external symbol. */
4651 indx = ELF32_R_SYM (irel->r_info) - symtab_hdr->sh_info;
4652 h = elf_sym_hashes (abfd)[indx];
4653 BFD_ASSERT (h != NULL);
4654 if (h->root.type == bfd_link_hash_defined
4655 || h->root.type == bfd_link_hash_defweak)
4656 targetsec = h->root.u.def.section;
4661 bfd_put_32 (abfd, irel->r_offset + datasec->output_offset, p);
4662 memset (p + 4, 0, 8);
4663 if (targetsec != NULL)
4664 strncpy ((char *) p + 4, targetsec->output_section->name, 8);
4667 if (isymbuf != NULL && symtab_hdr->contents != (unsigned char *) isymbuf)
4669 if (internal_relocs != NULL
4670 && elf_section_data (datasec)->relocs != internal_relocs)
4671 free (internal_relocs);
4675 if (isymbuf != NULL && symtab_hdr->contents != (unsigned char *) isymbuf)
4677 if (internal_relocs != NULL
4678 && elf_section_data (datasec)->relocs != internal_relocs)
4679 free (internal_relocs);
4683 /* Set target options. */
4686 bfd_elf_m68k_set_target_options (struct bfd_link_info *info, int got_handling)
4688 struct elf_m68k_link_hash_table *htab;
4690 htab = elf_m68k_hash_table (info);
4692 switch (got_handling)
4696 htab->local_gp_p = FALSE;
4697 htab->use_neg_got_offsets_p = FALSE;
4698 htab->allow_multigot_p = FALSE;
4702 /* --got=negative. */
4703 htab->local_gp_p = TRUE;
4704 htab->use_neg_got_offsets_p = TRUE;
4705 htab->allow_multigot_p = FALSE;
4709 /* --got=multigot. */
4710 htab->local_gp_p = TRUE;
4711 htab->use_neg_got_offsets_p = TRUE;
4712 htab->allow_multigot_p = TRUE;
4720 static enum elf_reloc_type_class
4721 elf32_m68k_reloc_type_class (rela)
4722 const Elf_Internal_Rela *rela;
4724 switch ((int) ELF32_R_TYPE (rela->r_info))
4726 case R_68K_RELATIVE:
4727 return reloc_class_relative;
4728 case R_68K_JMP_SLOT:
4729 return reloc_class_plt;
4731 return reloc_class_copy;
4733 return reloc_class_normal;
4737 /* Return address for Ith PLT stub in section PLT, for relocation REL
4738 or (bfd_vma) -1 if it should not be included. */
4741 elf_m68k_plt_sym_val (bfd_vma i, const asection *plt,
4742 const arelent *rel ATTRIBUTE_UNUSED)
4744 return plt->vma + (i + 1) * elf_m68k_get_plt_info (plt->owner)->size;
4747 #define TARGET_BIG_SYM bfd_elf32_m68k_vec
4748 #define TARGET_BIG_NAME "elf32-m68k"
4749 #define ELF_MACHINE_CODE EM_68K
4750 #define ELF_MAXPAGESIZE 0x2000
4751 #define elf_backend_create_dynamic_sections \
4752 _bfd_elf_create_dynamic_sections
4753 #define bfd_elf32_bfd_link_hash_table_create \
4754 elf_m68k_link_hash_table_create
4755 /* ??? Should it be this macro or bfd_elfNN_bfd_link_hash_table_create? */
4756 #define bfd_elf32_bfd_link_hash_table_free \
4757 elf_m68k_link_hash_table_free
4758 #define bfd_elf32_bfd_final_link bfd_elf_final_link
4760 #define elf_backend_check_relocs elf_m68k_check_relocs
4761 #define elf_backend_always_size_sections \
4762 elf_m68k_always_size_sections
4763 #define elf_backend_adjust_dynamic_symbol \
4764 elf_m68k_adjust_dynamic_symbol
4765 #define elf_backend_size_dynamic_sections \
4766 elf_m68k_size_dynamic_sections
4767 #define elf_backend_init_index_section _bfd_elf_init_1_index_section
4768 #define elf_backend_relocate_section elf_m68k_relocate_section
4769 #define elf_backend_finish_dynamic_symbol \
4770 elf_m68k_finish_dynamic_symbol
4771 #define elf_backend_finish_dynamic_sections \
4772 elf_m68k_finish_dynamic_sections
4773 #define elf_backend_gc_mark_hook elf_m68k_gc_mark_hook
4774 #define elf_backend_gc_sweep_hook elf_m68k_gc_sweep_hook
4775 #define elf_backend_copy_indirect_symbol elf_m68k_copy_indirect_symbol
4776 #define bfd_elf32_bfd_merge_private_bfd_data \
4777 elf32_m68k_merge_private_bfd_data
4778 #define bfd_elf32_bfd_set_private_flags \
4779 elf32_m68k_set_private_flags
4780 #define bfd_elf32_bfd_print_private_bfd_data \
4781 elf32_m68k_print_private_bfd_data
4782 #define elf_backend_reloc_type_class elf32_m68k_reloc_type_class
4783 #define elf_backend_plt_sym_val elf_m68k_plt_sym_val
4784 #define elf_backend_object_p elf32_m68k_object_p
4786 #define elf_backend_can_gc_sections 1
4787 #define elf_backend_can_refcount 1
4788 #define elf_backend_want_got_plt 1
4789 #define elf_backend_plt_readonly 1
4790 #define elf_backend_want_plt_sym 0
4791 #define elf_backend_got_header_size 12
4792 #define elf_backend_rela_normal 1
4794 #include "elf32-target.h"