1 /* ELF executable support for BFD.
2 Copyright 1991, 1992, 1993, 1994, 1995, 1996, 1997, 1998, 1999, 2000,
3 2001, 2002 Free Software Foundation, Inc.
5 Written by Fred Fish @ Cygnus Support, from information published
6 in "UNIX System V Release 4, Programmers Guide: ANSI C and
7 Programming Support Tools". Sufficient support for gdb.
9 Rewritten by Mark Eichin @ Cygnus Support, from information
10 published in "System V Application Binary Interface", chapters 4
11 and 5, as well as the various "Processor Supplement" documents
12 derived from it. Added support for assembler and other object file
13 utilities. Further work done by Ken Raeburn (Cygnus Support), Michael
14 Meissner (Open Software Foundation), and Peter Hoogenboom (University
15 of Utah) to finish and extend this.
17 This file is part of BFD, the Binary File Descriptor library.
19 This program is free software; you can redistribute it and/or modify
20 it under the terms of the GNU General Public License as published by
21 the Free Software Foundation; either version 2 of the License, or
22 (at your option) any later version.
24 This program is distributed in the hope that it will be useful,
25 but WITHOUT ANY WARRANTY; without even the implied warranty of
26 MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
27 GNU General Public License for more details.
29 You should have received a copy of the GNU General Public License
30 along with this program; if not, write to the Free Software
31 Foundation, Inc., 59 Temple Place - Suite 330, Boston, MA 02111-1307, USA. */
33 /* Problems and other issues to resolve.
35 (1) BFD expects there to be some fixed number of "sections" in
36 the object file. I.E. there is a "section_count" variable in the
37 bfd structure which contains the number of sections. However, ELF
38 supports multiple "views" of a file. In particular, with current
39 implementations, executable files typically have two tables, a
40 program header table and a section header table, both of which
41 partition the executable.
43 In ELF-speak, the "linking view" of the file uses the section header
44 table to access "sections" within the file, and the "execution view"
45 uses the program header table to access "segments" within the file.
46 "Segments" typically may contain all the data from one or more
49 Note that the section header table is optional in ELF executables,
50 but it is this information that is most useful to gdb. If the
51 section header table is missing, then gdb should probably try
52 to make do with the program header table. (FIXME)
54 (2) The code in this file is compiled twice, once in 32-bit mode and
55 once in 64-bit mode. More of it should be made size-independent
58 (3) ELF section symbols are handled rather sloppily now. This should
59 be cleaned up, and ELF section symbols reconciled with BFD section
62 (4) We need a published spec for 64-bit ELF. We've got some stuff here
63 that we're using for SPARC V9 64-bit chips, but don't assume that
69 #include "libiberty.h"
74 /* Renaming structures, typedefs, macros and functions to be size-specific. */
75 #define Elf_External_Ehdr NAME(Elf,External_Ehdr)
76 #define Elf_External_Sym NAME(Elf,External_Sym)
77 #define Elf_External_Shdr NAME(Elf,External_Shdr)
78 #define Elf_External_Phdr NAME(Elf,External_Phdr)
79 #define Elf_External_Rel NAME(Elf,External_Rel)
80 #define Elf_External_Rela NAME(Elf,External_Rela)
81 #define Elf_External_Dyn NAME(Elf,External_Dyn)
83 #define elf_core_file_failing_command NAME(bfd_elf,core_file_failing_command)
84 #define elf_core_file_failing_signal NAME(bfd_elf,core_file_failing_signal)
85 #define elf_core_file_matches_executable_p \
86 NAME(bfd_elf,core_file_matches_executable_p)
87 #define elf_object_p NAME(bfd_elf,object_p)
88 #define elf_core_file_p NAME(bfd_elf,core_file_p)
89 #define elf_get_symtab_upper_bound NAME(bfd_elf,get_symtab_upper_bound)
90 #define elf_get_dynamic_symtab_upper_bound \
91 NAME(bfd_elf,get_dynamic_symtab_upper_bound)
92 #define elf_swap_reloc_in NAME(bfd_elf,swap_reloc_in)
93 #define elf_swap_reloca_in NAME(bfd_elf,swap_reloca_in)
94 #define elf_swap_reloc_out NAME(bfd_elf,swap_reloc_out)
95 #define elf_swap_reloca_out NAME(bfd_elf,swap_reloca_out)
96 #define elf_swap_symbol_in NAME(bfd_elf,swap_symbol_in)
97 #define elf_swap_symbol_out NAME(bfd_elf,swap_symbol_out)
98 #define elf_swap_phdr_in NAME(bfd_elf,swap_phdr_in)
99 #define elf_swap_phdr_out NAME(bfd_elf,swap_phdr_out)
100 #define elf_swap_dyn_in NAME(bfd_elf,swap_dyn_in)
101 #define elf_swap_dyn_out NAME(bfd_elf,swap_dyn_out)
102 #define elf_get_reloc_upper_bound NAME(bfd_elf,get_reloc_upper_bound)
103 #define elf_canonicalize_reloc NAME(bfd_elf,canonicalize_reloc)
104 #define elf_slurp_symbol_table NAME(bfd_elf,slurp_symbol_table)
105 #define elf_get_symtab NAME(bfd_elf,get_symtab)
106 #define elf_canonicalize_dynamic_symtab \
107 NAME(bfd_elf,canonicalize_dynamic_symtab)
108 #define elf_make_empty_symbol NAME(bfd_elf,make_empty_symbol)
109 #define elf_get_symbol_info NAME(bfd_elf,get_symbol_info)
110 #define elf_get_lineno NAME(bfd_elf,get_lineno)
111 #define elf_set_arch_mach NAME(bfd_elf,set_arch_mach)
112 #define elf_find_nearest_line NAME(bfd_elf,find_nearest_line)
113 #define elf_sizeof_headers NAME(bfd_elf,sizeof_headers)
114 #define elf_set_section_contents NAME(bfd_elf,set_section_contents)
115 #define elf_no_info_to_howto NAME(bfd_elf,no_info_to_howto)
116 #define elf_no_info_to_howto_rel NAME(bfd_elf,no_info_to_howto_rel)
117 #define elf_find_section NAME(bfd_elf,find_section)
118 #define elf_bfd_link_add_symbols NAME(bfd_elf,bfd_link_add_symbols)
119 #define elf_add_dynamic_entry NAME(bfd_elf,add_dynamic_entry)
120 #define elf_write_shdrs_and_ehdr NAME(bfd_elf,write_shdrs_and_ehdr)
121 #define elf_write_out_phdrs NAME(bfd_elf,write_out_phdrs)
122 #define elf_write_relocs NAME(bfd_elf,write_relocs)
123 #define elf_slurp_reloc_table NAME(bfd_elf,slurp_reloc_table)
124 #define elf_link_create_dynamic_sections \
125 NAME(bfd_elf,link_create_dynamic_sections)
126 #define elf_bfd_discard_info NAME(bfd_elf,discard_info)
127 #define elf_reloc_symbol_deleted_p NAME(_bfd_elf,reloc_symbol_deleted_p)
128 #define elf_link_record_dynamic_symbol _bfd_elf_link_record_dynamic_symbol
129 #define elf_bfd_final_link NAME(bfd_elf,bfd_final_link)
130 #define elf_create_pointer_linker_section NAME(bfd_elf,create_pointer_linker_section)
131 #define elf_finish_pointer_linker_section NAME(bfd_elf,finish_pointer_linker_section)
132 #define elf_gc_sections NAME(_bfd_elf,gc_sections)
133 #define elf_gc_common_finalize_got_offsets \
134 NAME(_bfd_elf,gc_common_finalize_got_offsets)
135 #define elf_gc_common_final_link NAME(_bfd_elf,gc_common_final_link)
136 #define elf_gc_record_vtinherit NAME(_bfd_elf,gc_record_vtinherit)
137 #define elf_gc_record_vtentry NAME(_bfd_elf,gc_record_vtentry)
138 #define elf_link_record_local_dynamic_symbol \
139 NAME(_bfd_elf,link_record_local_dynamic_symbol)
142 #define ELF_R_INFO(X,Y) ELF64_R_INFO(X,Y)
143 #define ELF_R_SYM(X) ELF64_R_SYM(X)
144 #define ELF_R_TYPE(X) ELF64_R_TYPE(X)
145 #define ELFCLASS ELFCLASS64
147 #define LOG_FILE_ALIGN 3
150 #define ELF_R_INFO(X,Y) ELF32_R_INFO(X,Y)
151 #define ELF_R_SYM(X) ELF32_R_SYM(X)
152 #define ELF_R_TYPE(X) ELF32_R_TYPE(X)
153 #define ELFCLASS ELFCLASS32
155 #define LOG_FILE_ALIGN 2
158 /* Static functions */
160 static void elf_swap_ehdr_in
161 PARAMS ((bfd *, const Elf_External_Ehdr *, Elf_Internal_Ehdr *));
162 static void elf_swap_ehdr_out
163 PARAMS ((bfd *, const Elf_Internal_Ehdr *, Elf_External_Ehdr *));
164 static void elf_swap_shdr_in
165 PARAMS ((bfd *, const Elf_External_Shdr *, Elf_Internal_Shdr *));
166 static void elf_swap_shdr_out
167 PARAMS ((bfd *, const Elf_Internal_Shdr *, Elf_External_Shdr *));
169 #define elf_stringtab_init _bfd_elf_stringtab_init
171 #define section_from_elf_index bfd_section_from_elf_index
173 static boolean elf_slurp_reloc_table_from_section
174 PARAMS ((bfd *, asection *, Elf_Internal_Shdr *, bfd_size_type,
175 arelent *, asymbol **, boolean));
177 static boolean elf_file_p PARAMS ((Elf_External_Ehdr *));
180 static void elf_debug_section PARAMS ((int, Elf_Internal_Shdr *));
181 static void elf_debug_file PARAMS ((Elf_Internal_Ehdr *));
182 static char *elf_symbol_flags PARAMS ((flagword));
185 /* Structure swapping routines */
187 /* Should perhaps use put_offset, put_word, etc. For now, the two versions
188 can be handled by explicitly specifying 32 bits or "the long type". */
190 #define H_PUT_WORD H_PUT_64
191 #define H_PUT_SIGNED_WORD H_PUT_S64
192 #define H_GET_WORD H_GET_64
193 #define H_GET_SIGNED_WORD H_GET_S64
196 #define H_PUT_WORD H_PUT_32
197 #define H_PUT_SIGNED_WORD H_PUT_S32
198 #define H_GET_WORD H_GET_32
199 #define H_GET_SIGNED_WORD H_GET_S32
202 /* Translate an ELF symbol in external format into an ELF symbol in internal
206 elf_swap_symbol_in (abfd, psrc, pshn, dst)
210 Elf_Internal_Sym *dst;
212 const Elf_External_Sym *src = (const Elf_External_Sym *) psrc;
213 const Elf_External_Sym_Shndx *shndx = (const Elf_External_Sym_Shndx *) pshn;
214 int signed_vma = get_elf_backend_data (abfd)->sign_extend_vma;
216 dst->st_name = H_GET_32 (abfd, src->st_name);
218 dst->st_value = H_GET_SIGNED_WORD (abfd, src->st_value);
220 dst->st_value = H_GET_WORD (abfd, src->st_value);
221 dst->st_size = H_GET_WORD (abfd, src->st_size);
222 dst->st_info = H_GET_8 (abfd, src->st_info);
223 dst->st_other = H_GET_8 (abfd, src->st_other);
224 dst->st_shndx = H_GET_16 (abfd, src->st_shndx);
225 if (dst->st_shndx == SHN_XINDEX)
229 dst->st_shndx = H_GET_32 (abfd, shndx->est_shndx);
233 /* Translate an ELF symbol in internal format into an ELF symbol in external
237 elf_swap_symbol_out (abfd, src, cdst, shndx)
239 const Elf_Internal_Sym *src;
244 Elf_External_Sym *dst = (Elf_External_Sym *) cdst;
245 H_PUT_32 (abfd, src->st_name, dst->st_name);
246 H_PUT_WORD (abfd, src->st_value, dst->st_value);
247 H_PUT_WORD (abfd, src->st_size, dst->st_size);
248 H_PUT_8 (abfd, src->st_info, dst->st_info);
249 H_PUT_8 (abfd, src->st_other, dst->st_other);
251 if (tmp > SHN_HIRESERVE)
255 H_PUT_32 (abfd, tmp, shndx);
258 H_PUT_16 (abfd, tmp, dst->st_shndx);
261 /* Translate an ELF file header in external format into an ELF file header in
265 elf_swap_ehdr_in (abfd, src, dst)
267 const Elf_External_Ehdr *src;
268 Elf_Internal_Ehdr *dst;
270 int signed_vma = get_elf_backend_data (abfd)->sign_extend_vma;
271 memcpy (dst->e_ident, src->e_ident, EI_NIDENT);
272 dst->e_type = H_GET_16 (abfd, src->e_type);
273 dst->e_machine = H_GET_16 (abfd, src->e_machine);
274 dst->e_version = H_GET_32 (abfd, src->e_version);
276 dst->e_entry = H_GET_SIGNED_WORD (abfd, src->e_entry);
278 dst->e_entry = H_GET_WORD (abfd, src->e_entry);
279 dst->e_phoff = H_GET_WORD (abfd, src->e_phoff);
280 dst->e_shoff = H_GET_WORD (abfd, src->e_shoff);
281 dst->e_flags = H_GET_32 (abfd, src->e_flags);
282 dst->e_ehsize = H_GET_16 (abfd, src->e_ehsize);
283 dst->e_phentsize = H_GET_16 (abfd, src->e_phentsize);
284 dst->e_phnum = H_GET_16 (abfd, src->e_phnum);
285 dst->e_shentsize = H_GET_16 (abfd, src->e_shentsize);
286 dst->e_shnum = H_GET_16 (abfd, src->e_shnum);
287 dst->e_shstrndx = H_GET_16 (abfd, src->e_shstrndx);
290 /* Translate an ELF file header in internal format into an ELF file header in
294 elf_swap_ehdr_out (abfd, src, dst)
296 const Elf_Internal_Ehdr *src;
297 Elf_External_Ehdr *dst;
300 int signed_vma = get_elf_backend_data (abfd)->sign_extend_vma;
301 memcpy (dst->e_ident, src->e_ident, EI_NIDENT);
302 /* note that all elements of dst are *arrays of unsigned char* already... */
303 H_PUT_16 (abfd, src->e_type, dst->e_type);
304 H_PUT_16 (abfd, src->e_machine, dst->e_machine);
305 H_PUT_32 (abfd, src->e_version, dst->e_version);
307 H_PUT_SIGNED_WORD (abfd, src->e_entry, dst->e_entry);
309 H_PUT_WORD (abfd, src->e_entry, dst->e_entry);
310 H_PUT_WORD (abfd, src->e_phoff, dst->e_phoff);
311 H_PUT_WORD (abfd, src->e_shoff, dst->e_shoff);
312 H_PUT_32 (abfd, src->e_flags, dst->e_flags);
313 H_PUT_16 (abfd, src->e_ehsize, dst->e_ehsize);
314 H_PUT_16 (abfd, src->e_phentsize, dst->e_phentsize);
315 H_PUT_16 (abfd, src->e_phnum, dst->e_phnum);
316 H_PUT_16 (abfd, src->e_shentsize, dst->e_shentsize);
318 if (tmp >= SHN_LORESERVE)
320 H_PUT_16 (abfd, tmp, dst->e_shnum);
321 tmp = src->e_shstrndx;
322 if (tmp >= SHN_LORESERVE)
324 H_PUT_16 (abfd, tmp, dst->e_shstrndx);
327 /* Translate an ELF section header table entry in external format into an
328 ELF section header table entry in internal format. */
331 elf_swap_shdr_in (abfd, src, dst)
333 const Elf_External_Shdr *src;
334 Elf_Internal_Shdr *dst;
336 int signed_vma = get_elf_backend_data (abfd)->sign_extend_vma;
338 dst->sh_name = H_GET_32 (abfd, src->sh_name);
339 dst->sh_type = H_GET_32 (abfd, src->sh_type);
340 dst->sh_flags = H_GET_WORD (abfd, src->sh_flags);
342 dst->sh_addr = H_GET_SIGNED_WORD (abfd, src->sh_addr);
344 dst->sh_addr = H_GET_WORD (abfd, src->sh_addr);
345 dst->sh_offset = H_GET_WORD (abfd, src->sh_offset);
346 dst->sh_size = H_GET_WORD (abfd, src->sh_size);
347 dst->sh_link = H_GET_32 (abfd, src->sh_link);
348 dst->sh_info = H_GET_32 (abfd, src->sh_info);
349 dst->sh_addralign = H_GET_WORD (abfd, src->sh_addralign);
350 dst->sh_entsize = H_GET_WORD (abfd, src->sh_entsize);
351 dst->bfd_section = NULL;
352 dst->contents = NULL;
355 /* Translate an ELF section header table entry in internal format into an
356 ELF section header table entry in external format. */
359 elf_swap_shdr_out (abfd, src, dst)
361 const Elf_Internal_Shdr *src;
362 Elf_External_Shdr *dst;
364 /* note that all elements of dst are *arrays of unsigned char* already... */
365 H_PUT_32 (abfd, src->sh_name, dst->sh_name);
366 H_PUT_32 (abfd, src->sh_type, dst->sh_type);
367 H_PUT_WORD (abfd, src->sh_flags, dst->sh_flags);
368 H_PUT_WORD (abfd, src->sh_addr, dst->sh_addr);
369 H_PUT_WORD (abfd, src->sh_offset, dst->sh_offset);
370 H_PUT_WORD (abfd, src->sh_size, dst->sh_size);
371 H_PUT_32 (abfd, src->sh_link, dst->sh_link);
372 H_PUT_32 (abfd, src->sh_info, dst->sh_info);
373 H_PUT_WORD (abfd, src->sh_addralign, dst->sh_addralign);
374 H_PUT_WORD (abfd, src->sh_entsize, dst->sh_entsize);
377 /* Translate an ELF program header table entry in external format into an
378 ELF program header table entry in internal format. */
381 elf_swap_phdr_in (abfd, src, dst)
383 const Elf_External_Phdr *src;
384 Elf_Internal_Phdr *dst;
386 int signed_vma = get_elf_backend_data (abfd)->sign_extend_vma;
388 dst->p_type = H_GET_32 (abfd, src->p_type);
389 dst->p_flags = H_GET_32 (abfd, src->p_flags);
390 dst->p_offset = H_GET_WORD (abfd, src->p_offset);
393 dst->p_vaddr = H_GET_SIGNED_WORD (abfd, src->p_vaddr);
394 dst->p_paddr = H_GET_SIGNED_WORD (abfd, src->p_paddr);
398 dst->p_vaddr = H_GET_WORD (abfd, src->p_vaddr);
399 dst->p_paddr = H_GET_WORD (abfd, src->p_paddr);
401 dst->p_filesz = H_GET_WORD (abfd, src->p_filesz);
402 dst->p_memsz = H_GET_WORD (abfd, src->p_memsz);
403 dst->p_align = H_GET_WORD (abfd, src->p_align);
407 elf_swap_phdr_out (abfd, src, dst)
409 const Elf_Internal_Phdr *src;
410 Elf_External_Phdr *dst;
412 /* note that all elements of dst are *arrays of unsigned char* already... */
413 H_PUT_32 (abfd, src->p_type, dst->p_type);
414 H_PUT_WORD (abfd, src->p_offset, dst->p_offset);
415 H_PUT_WORD (abfd, src->p_vaddr, dst->p_vaddr);
416 H_PUT_WORD (abfd, src->p_paddr, dst->p_paddr);
417 H_PUT_WORD (abfd, src->p_filesz, dst->p_filesz);
418 H_PUT_WORD (abfd, src->p_memsz, dst->p_memsz);
419 H_PUT_32 (abfd, src->p_flags, dst->p_flags);
420 H_PUT_WORD (abfd, src->p_align, dst->p_align);
423 /* Translate an ELF reloc from external format to internal format. */
425 elf_swap_reloc_in (abfd, src, dst)
427 const Elf_External_Rel *src;
428 Elf_Internal_Rel *dst;
430 dst->r_offset = H_GET_WORD (abfd, src->r_offset);
431 dst->r_info = H_GET_WORD (abfd, src->r_info);
435 elf_swap_reloca_in (abfd, src, dst)
437 const Elf_External_Rela *src;
438 Elf_Internal_Rela *dst;
440 dst->r_offset = H_GET_WORD (abfd, src->r_offset);
441 dst->r_info = H_GET_WORD (abfd, src->r_info);
442 dst->r_addend = H_GET_SIGNED_WORD (abfd, src->r_addend);
445 /* Translate an ELF reloc from internal format to external format. */
447 elf_swap_reloc_out (abfd, src, dst)
449 const Elf_Internal_Rel *src;
450 Elf_External_Rel *dst;
452 H_PUT_WORD (abfd, src->r_offset, dst->r_offset);
453 H_PUT_WORD (abfd, src->r_info, dst->r_info);
457 elf_swap_reloca_out (abfd, src, dst)
459 const Elf_Internal_Rela *src;
460 Elf_External_Rela *dst;
462 H_PUT_WORD (abfd, src->r_offset, dst->r_offset);
463 H_PUT_WORD (abfd, src->r_info, dst->r_info);
464 H_PUT_SIGNED_WORD (abfd, src->r_addend, dst->r_addend);
468 elf_swap_dyn_in (abfd, p, dst)
471 Elf_Internal_Dyn *dst;
473 const Elf_External_Dyn *src = (const Elf_External_Dyn *) p;
475 dst->d_tag = H_GET_WORD (abfd, src->d_tag);
476 dst->d_un.d_val = H_GET_WORD (abfd, src->d_un.d_val);
480 elf_swap_dyn_out (abfd, src, p)
482 const Elf_Internal_Dyn *src;
485 Elf_External_Dyn *dst = (Elf_External_Dyn *) p;
487 H_PUT_WORD (abfd, src->d_tag, dst->d_tag);
488 H_PUT_WORD (abfd, src->d_un.d_val, dst->d_un.d_val);
491 /* ELF .o/exec file reading */
493 /* Begin processing a given object.
495 First we validate the file by reading in the ELF header and checking
498 static INLINE boolean
500 Elf_External_Ehdr *x_ehdrp;
502 return ((x_ehdrp->e_ident[EI_MAG0] == ELFMAG0)
503 && (x_ehdrp->e_ident[EI_MAG1] == ELFMAG1)
504 && (x_ehdrp->e_ident[EI_MAG2] == ELFMAG2)
505 && (x_ehdrp->e_ident[EI_MAG3] == ELFMAG3));
508 /* Check to see if the file associated with ABFD matches the target vector
511 Note that we may be called several times with the same ABFD, but different
512 target vectors, most of which will not match. We have to avoid leaving
513 any side effects in ABFD, or any data it points to (like tdata), if the
514 file does not match the target vector. */
520 Elf_External_Ehdr x_ehdr; /* Elf file header, external form */
521 Elf_Internal_Ehdr *i_ehdrp; /* Elf file header, internal form */
522 Elf_External_Shdr x_shdr; /* Section header table entry, external form */
523 Elf_Internal_Shdr i_shdr;
524 Elf_Internal_Shdr *i_shdrp; /* Section header table, internal form */
525 unsigned int shindex;
526 char *shstrtab; /* Internal copy of section header stringtab */
527 struct elf_backend_data *ebd;
528 struct bfd_preserve preserve;
532 preserve.marker = NULL;
534 /* Read in the ELF header in external format. */
536 if (bfd_bread ((PTR) & x_ehdr, (bfd_size_type) sizeof (x_ehdr), abfd)
539 if (bfd_get_error () != bfd_error_system_call)
540 goto got_wrong_format_error;
545 /* Now check to see if we have a valid ELF file, and one that BFD can
546 make use of. The magic number must match, the address size ('class')
547 and byte-swapping must match our XVEC entry, and it must have a
548 section header table (FIXME: See comments re sections at top of this
551 if (! elf_file_p (&x_ehdr)
552 || x_ehdr.e_ident[EI_VERSION] != EV_CURRENT
553 || x_ehdr.e_ident[EI_CLASS] != ELFCLASS)
554 goto got_wrong_format_error;
556 /* Check that file's byte order matches xvec's */
557 switch (x_ehdr.e_ident[EI_DATA])
559 case ELFDATA2MSB: /* Big-endian */
560 if (! bfd_header_big_endian (abfd))
561 goto got_wrong_format_error;
563 case ELFDATA2LSB: /* Little-endian */
564 if (! bfd_header_little_endian (abfd))
565 goto got_wrong_format_error;
567 case ELFDATANONE: /* No data encoding specified */
568 default: /* Unknown data encoding specified */
569 goto got_wrong_format_error;
572 /* Allocate an instance of the elf_obj_tdata structure and hook it up to
573 the tdata pointer in the bfd. */
575 amt = sizeof (struct elf_obj_tdata);
576 preserve.marker = bfd_zalloc (abfd, amt);
577 if (preserve.marker == NULL)
579 if (!bfd_preserve_save (abfd, &preserve))
582 elf_tdata (abfd) = preserve.marker;
584 /* Now that we know the byte order, swap in the rest of the header */
585 i_ehdrp = elf_elfheader (abfd);
586 elf_swap_ehdr_in (abfd, &x_ehdr, i_ehdrp);
588 elf_debug_file (i_ehdrp);
591 /* Reject ET_CORE (header indicates core file, not object file) */
592 if (i_ehdrp->e_type == ET_CORE)
593 goto got_wrong_format_error;
595 /* If this is a relocatable file and there is no section header
596 table, then we're hosed. */
597 if (i_ehdrp->e_shoff == 0 && i_ehdrp->e_type == ET_REL)
598 goto got_wrong_format_error;
600 /* As a simple sanity check, verify that the what BFD thinks is the
601 size of each section header table entry actually matches the size
602 recorded in the file, but only if there are any sections. */
603 if (i_ehdrp->e_shentsize != sizeof (x_shdr) && i_ehdrp->e_shnum != 0)
604 goto got_wrong_format_error;
606 /* Further sanity check. */
607 if (i_ehdrp->e_shoff == 0 && i_ehdrp->e_shnum != 0)
608 goto got_wrong_format_error;
610 ebd = get_elf_backend_data (abfd);
612 /* Check that the ELF e_machine field matches what this particular
613 BFD format expects. */
614 if (ebd->elf_machine_code != i_ehdrp->e_machine
615 && (ebd->elf_machine_alt1 == 0
616 || i_ehdrp->e_machine != ebd->elf_machine_alt1)
617 && (ebd->elf_machine_alt2 == 0
618 || i_ehdrp->e_machine != ebd->elf_machine_alt2))
620 const bfd_target * const *target_ptr;
622 if (ebd->elf_machine_code != EM_NONE)
623 goto got_wrong_format_error;
625 /* This is the generic ELF target. Let it match any ELF target
626 for which we do not have a specific backend. */
627 for (target_ptr = bfd_target_vector; *target_ptr != NULL; target_ptr++)
629 struct elf_backend_data *back;
631 if ((*target_ptr)->flavour != bfd_target_elf_flavour)
633 back = (struct elf_backend_data *) (*target_ptr)->backend_data;
634 if (back->elf_machine_code == i_ehdrp->e_machine
635 || (back->elf_machine_alt1 != 0
636 && back->elf_machine_alt1 == i_ehdrp->e_machine)
637 || (back->elf_machine_alt2 != 0
638 && back->elf_machine_alt2 == i_ehdrp->e_machine))
640 /* target_ptr is an ELF backend which matches this
641 object file, so reject the generic ELF target. */
642 goto got_wrong_format_error;
647 if (i_ehdrp->e_type == ET_EXEC)
648 abfd->flags |= EXEC_P;
649 else if (i_ehdrp->e_type == ET_DYN)
650 abfd->flags |= DYNAMIC;
652 if (i_ehdrp->e_phnum > 0)
653 abfd->flags |= D_PAGED;
655 if (! bfd_default_set_arch_mach (abfd, ebd->arch, 0))
657 /* It's OK if this fails for the generic target. */
658 if (ebd->elf_machine_code != EM_NONE)
662 /* Remember the entry point specified in the ELF file header. */
663 bfd_set_start_address (abfd, i_ehdrp->e_entry);
665 if (i_ehdrp->e_shoff != 0)
667 /* Seek to the section header table in the file. */
668 if (bfd_seek (abfd, (file_ptr) i_ehdrp->e_shoff, SEEK_SET) != 0)
671 /* Read the first section header at index 0, and convert to internal
673 if (bfd_bread ((PTR) & x_shdr, (bfd_size_type) sizeof x_shdr, abfd)
676 elf_swap_shdr_in (abfd, &x_shdr, &i_shdr);
678 /* If the section count is zero, the actual count is in the first
680 if (i_ehdrp->e_shnum == SHN_UNDEF)
681 i_ehdrp->e_shnum = i_shdr.sh_size;
683 /* And similarly for the string table index. */
684 if (i_ehdrp->e_shstrndx == SHN_XINDEX)
685 i_ehdrp->e_shstrndx = i_shdr.sh_link;
688 /* Allocate space for a copy of the section header table in
690 if (i_ehdrp->e_shnum != 0)
692 Elf_Internal_Shdr *shdrp;
693 unsigned int num_sec;
695 amt = sizeof (*i_shdrp) * i_ehdrp->e_shnum;
696 i_shdrp = (Elf_Internal_Shdr *) bfd_alloc (abfd, amt);
699 num_sec = i_ehdrp->e_shnum;
700 if (num_sec > SHN_LORESERVE)
701 num_sec += SHN_HIRESERVE + 1 - SHN_LORESERVE;
702 elf_numsections (abfd) = num_sec;
703 amt = sizeof (i_shdrp) * num_sec;
704 elf_elfsections (abfd) = (Elf_Internal_Shdr **) bfd_alloc (abfd, amt);
705 if (!elf_elfsections (abfd))
708 memcpy (i_shdrp, &i_shdr, sizeof (*i_shdrp));
711 if (num_sec > SHN_LORESERVE)
713 for ( ; shindex < SHN_LORESERVE; shindex++)
714 elf_elfsections (abfd)[shindex] = shdrp++;
715 for ( ; shindex < SHN_HIRESERVE + 1; shindex++)
716 elf_elfsections (abfd)[shindex] = i_shdrp;
718 for ( ; shindex < num_sec; shindex++)
719 elf_elfsections (abfd)[shindex] = shdrp++;
721 /* Read in the rest of the section header table and convert it
723 for (shindex = 1; shindex < i_ehdrp->e_shnum; shindex++)
725 if (bfd_bread ((PTR) & x_shdr, (bfd_size_type) sizeof x_shdr, abfd)
728 elf_swap_shdr_in (abfd, &x_shdr, i_shdrp + shindex);
730 /* If the section is loaded, but not page aligned, clear
732 if (i_shdrp[shindex].sh_size != 0
733 && (i_shdrp[shindex].sh_flags & SHF_ALLOC) != 0
734 && i_shdrp[shindex].sh_type != SHT_NOBITS
735 && (((i_shdrp[shindex].sh_addr - i_shdrp[shindex].sh_offset)
738 abfd->flags &= ~D_PAGED;
742 if (i_ehdrp->e_shstrndx && i_ehdrp->e_shoff)
744 if (! bfd_section_from_shdr (abfd, i_ehdrp->e_shstrndx))
748 /* Read in the program headers. */
749 if (i_ehdrp->e_phnum == 0)
750 elf_tdata (abfd)->phdr = NULL;
753 Elf_Internal_Phdr *i_phdr;
756 amt = i_ehdrp->e_phnum * sizeof (Elf_Internal_Phdr);
757 elf_tdata (abfd)->phdr = (Elf_Internal_Phdr *) bfd_alloc (abfd, amt);
758 if (elf_tdata (abfd)->phdr == NULL)
760 if (bfd_seek (abfd, (file_ptr) i_ehdrp->e_phoff, SEEK_SET) != 0)
762 i_phdr = elf_tdata (abfd)->phdr;
763 for (i = 0; i < i_ehdrp->e_phnum; i++, i_phdr++)
765 Elf_External_Phdr x_phdr;
767 if (bfd_bread ((PTR) &x_phdr, (bfd_size_type) sizeof x_phdr, abfd)
770 elf_swap_phdr_in (abfd, &x_phdr, i_phdr);
774 /* Read in the string table containing the names of the sections. We
775 will need the base pointer to this table later. */
776 /* We read this inline now, so that we don't have to go through
777 bfd_section_from_shdr with it (since this particular strtab is
778 used to find all of the ELF section names.) */
780 if (i_ehdrp->e_shstrndx != 0 && i_ehdrp->e_shoff)
782 unsigned int num_sec;
784 shstrtab = bfd_elf_get_str_section (abfd, i_ehdrp->e_shstrndx);
788 /* Once all of the section headers have been read and converted, we
789 can start processing them. Note that the first section header is
790 a dummy placeholder entry, so we ignore it. */
791 num_sec = elf_numsections (abfd);
792 for (shindex = 1; shindex < num_sec; shindex++)
794 if (! bfd_section_from_shdr (abfd, shindex))
796 if (shindex == SHN_LORESERVE - 1)
797 shindex += SHN_HIRESERVE + 1 - SHN_LORESERVE;
801 /* Let the backend double check the format and override global
803 if (ebd->elf_backend_object_p)
805 if (! (*ebd->elf_backend_object_p) (abfd))
806 goto got_wrong_format_error;
809 /* If we have created any reloc sections that are associated with
810 debugging sections, mark the reloc sections as debugging as well. */
811 for (s = abfd->sections; s != NULL; s = s->next)
813 if ((elf_section_data (s)->this_hdr.sh_type == SHT_REL
814 || elf_section_data (s)->this_hdr.sh_type == SHT_RELA)
815 && elf_section_data (s)->this_hdr.sh_info > 0)
817 unsigned long targ_index;
820 targ_index = elf_section_data (s)->this_hdr.sh_info;
821 targ_sec = bfd_section_from_elf_index (abfd, targ_index);
823 && (targ_sec->flags & SEC_DEBUGGING) != 0)
824 s->flags |= SEC_DEBUGGING;
828 bfd_preserve_finish (abfd, &preserve);
831 got_wrong_format_error:
832 /* There is way too much undoing of half-known state here. The caller,
833 bfd_check_format_matches, really shouldn't iterate on live bfd's to
834 check match/no-match like it does. We have to rely on that a call to
835 bfd_default_set_arch_mach with the previously known mach, undoes what
836 was done by the first bfd_default_set_arch_mach (with mach 0) here.
837 For this to work, only elf-data and the mach may be changed by the
838 target-specific elf_backend_object_p function. Note that saving the
839 whole bfd here and restoring it would be even worse; the first thing
840 you notice is that the cached bfd file position gets out of sync. */
841 bfd_set_error (bfd_error_wrong_format);
844 abfd->arch_info = preserve.arch_info;
845 if (preserve.marker != NULL)
846 bfd_preserve_restore (abfd, &preserve);
850 /* ELF .o/exec file writing */
852 /* Write out the relocs. */
855 elf_write_relocs (abfd, sec, data)
860 boolean *failedp = (boolean *) data;
861 Elf_Internal_Shdr *rela_hdr;
862 Elf_External_Rela *outbound_relocas;
863 Elf_External_Rel *outbound_relocs;
866 asymbol *last_sym = 0;
867 int last_sym_idx = 0;
869 /* If we have already failed, don't do anything. */
873 if ((sec->flags & SEC_RELOC) == 0)
876 /* The linker backend writes the relocs out itself, and sets the
877 reloc_count field to zero to inhibit writing them here. Also,
878 sometimes the SEC_RELOC flag gets set even when there aren't any
880 if (sec->reloc_count == 0)
883 rela_hdr = &elf_section_data (sec)->rel_hdr;
885 rela_hdr->sh_size = rela_hdr->sh_entsize * sec->reloc_count;
886 rela_hdr->contents = (PTR) bfd_alloc (abfd, rela_hdr->sh_size);
887 if (rela_hdr->contents == NULL)
893 /* Figure out whether the relocations are RELA or REL relocations. */
894 if (rela_hdr->sh_type == SHT_RELA)
896 else if (rela_hdr->sh_type == SHT_REL)
899 /* Every relocation section should be either an SHT_RELA or an
903 /* orelocation has the data, reloc_count has the count... */
906 outbound_relocas = (Elf_External_Rela *) rela_hdr->contents;
908 for (idx = 0; idx < sec->reloc_count; idx++)
910 Elf_Internal_Rela dst_rela;
911 Elf_External_Rela *src_rela;
916 ptr = sec->orelocation[idx];
917 src_rela = outbound_relocas + idx;
919 /* The address of an ELF reloc is section relative for an object
920 file, and absolute for an executable file or shared library.
921 The address of a BFD reloc is always section relative. */
922 if ((abfd->flags & (EXEC_P | DYNAMIC)) == 0)
923 dst_rela.r_offset = ptr->address;
925 dst_rela.r_offset = ptr->address + sec->vma;
927 sym = *ptr->sym_ptr_ptr;
930 else if (bfd_is_abs_section (sym->section) && sym->value == 0)
935 n = _bfd_elf_symbol_from_bfd_symbol (abfd, &sym);
944 if ((*ptr->sym_ptr_ptr)->the_bfd != NULL
945 && (*ptr->sym_ptr_ptr)->the_bfd->xvec != abfd->xvec
946 && ! _bfd_elf_validate_reloc (abfd, ptr))
952 dst_rela.r_info = ELF_R_INFO (n, ptr->howto->type);
954 dst_rela.r_addend = ptr->addend;
955 elf_swap_reloca_out (abfd, &dst_rela, src_rela);
959 /* REL relocations */
961 outbound_relocs = (Elf_External_Rel *) rela_hdr->contents;
963 for (idx = 0; idx < sec->reloc_count; idx++)
965 Elf_Internal_Rel dst_rel;
966 Elf_External_Rel *src_rel;
971 ptr = sec->orelocation[idx];
972 sym = *ptr->sym_ptr_ptr;
973 src_rel = outbound_relocs + idx;
975 /* The address of an ELF reloc is section relative for an object
976 file, and absolute for an executable file or shared library.
977 The address of a BFD reloc is always section relative. */
978 if ((abfd->flags & (EXEC_P | DYNAMIC)) == 0)
979 dst_rel.r_offset = ptr->address;
981 dst_rel.r_offset = ptr->address + sec->vma;
985 else if (bfd_is_abs_section (sym->section) && sym->value == 0)
990 n = _bfd_elf_symbol_from_bfd_symbol (abfd, &sym);
999 if ((*ptr->sym_ptr_ptr)->the_bfd != NULL
1000 && (*ptr->sym_ptr_ptr)->the_bfd->xvec != abfd->xvec
1001 && ! _bfd_elf_validate_reloc (abfd, ptr))
1007 dst_rel.r_info = ELF_R_INFO (n, ptr->howto->type);
1009 elf_swap_reloc_out (abfd, &dst_rel, src_rel);
1014 /* Write out the program headers. */
1017 elf_write_out_phdrs (abfd, phdr, count)
1019 const Elf_Internal_Phdr *phdr;
1024 Elf_External_Phdr extphdr;
1025 elf_swap_phdr_out (abfd, phdr, &extphdr);
1026 if (bfd_bwrite (&extphdr, (bfd_size_type) sizeof (Elf_External_Phdr),
1027 abfd) != sizeof (Elf_External_Phdr))
1034 /* Write out the section headers and the ELF file header. */
1037 elf_write_shdrs_and_ehdr (abfd)
1040 Elf_External_Ehdr x_ehdr; /* Elf file header, external form */
1041 Elf_Internal_Ehdr *i_ehdrp; /* Elf file header, internal form */
1042 Elf_External_Shdr *x_shdrp; /* Section header table, external form */
1043 Elf_Internal_Shdr **i_shdrp; /* Section header table, internal form */
1047 i_ehdrp = elf_elfheader (abfd);
1048 i_shdrp = elf_elfsections (abfd);
1050 /* swap the header before spitting it out... */
1053 elf_debug_file (i_ehdrp);
1055 elf_swap_ehdr_out (abfd, i_ehdrp, &x_ehdr);
1056 amt = sizeof (x_ehdr);
1057 if (bfd_seek (abfd, (file_ptr) 0, SEEK_SET) != 0
1058 || bfd_bwrite ((PTR) & x_ehdr, amt, abfd) != amt)
1061 /* Some fields in the first section header handle overflow of ehdr
1063 if (i_ehdrp->e_shnum >= SHN_LORESERVE)
1064 i_shdrp[0]->sh_size = i_ehdrp->e_shnum;
1065 if (i_ehdrp->e_shstrndx >= SHN_LORESERVE)
1066 i_shdrp[0]->sh_link = i_ehdrp->e_shstrndx;
1068 /* at this point we've concocted all the ELF sections... */
1069 amt = i_ehdrp->e_shnum;
1070 amt *= sizeof (*x_shdrp);
1071 x_shdrp = (Elf_External_Shdr *) bfd_alloc (abfd, amt);
1075 for (count = 0; count < i_ehdrp->e_shnum; i_shdrp++, count++)
1078 elf_debug_section (count, *i_shdrp);
1080 elf_swap_shdr_out (abfd, *i_shdrp, x_shdrp + count);
1082 if (count == SHN_LORESERVE - 1)
1083 i_shdrp += SHN_HIRESERVE + 1 - SHN_LORESERVE;
1085 if (bfd_seek (abfd, (file_ptr) i_ehdrp->e_shoff, SEEK_SET) != 0
1086 || bfd_bwrite ((PTR) x_shdrp, amt, abfd) != amt)
1089 /* need to dump the string table too... */
1095 elf_slurp_symbol_table (abfd, symptrs, dynamic)
1097 asymbol **symptrs; /* Buffer for generated bfd symbols */
1100 Elf_Internal_Shdr *hdr;
1101 Elf_Internal_Shdr *verhdr;
1102 unsigned long symcount; /* Number of external ELF symbols */
1103 elf_symbol_type *sym; /* Pointer to current bfd symbol */
1104 elf_symbol_type *symbase; /* Buffer for generated bfd symbols */
1105 Elf_Internal_Sym *isym;
1106 Elf_Internal_Sym *isymend;
1107 Elf_Internal_Sym *isymbuf = NULL;
1108 Elf_External_Versym *xver;
1109 Elf_External_Versym *xverbuf = NULL;
1110 struct elf_backend_data *ebd;
1113 /* Read each raw ELF symbol, converting from external ELF form to
1114 internal ELF form, and then using the information to create a
1115 canonical bfd symbol table entry.
1117 Note that we allocate the initial bfd canonical symbol buffer
1118 based on a one-to-one mapping of the ELF symbols to canonical
1119 symbols. We actually use all the ELF symbols, so there will be no
1120 space left over at the end. When we have all the symbols, we
1121 build the caller's pointer vector. */
1125 hdr = &elf_tdata (abfd)->symtab_hdr;
1130 hdr = &elf_tdata (abfd)->dynsymtab_hdr;
1131 if (elf_dynversym (abfd) == 0)
1134 verhdr = &elf_tdata (abfd)->dynversym_hdr;
1135 if ((elf_tdata (abfd)->dynverdef_section != 0
1136 && elf_tdata (abfd)->verdef == NULL)
1137 || (elf_tdata (abfd)->dynverref_section != 0
1138 && elf_tdata (abfd)->verref == NULL))
1140 if (! _bfd_elf_slurp_version_tables (abfd))
1145 ebd = get_elf_backend_data (abfd);
1146 symcount = hdr->sh_size / sizeof (Elf_External_Sym);
1148 sym = symbase = NULL;
1151 isymbuf = bfd_elf_get_elf_syms (abfd, hdr, symcount, 0,
1153 if (isymbuf == NULL)
1157 amt *= sizeof (elf_symbol_type);
1158 symbase = (elf_symbol_type *) bfd_zalloc (abfd, amt);
1159 if (symbase == (elf_symbol_type *) NULL)
1162 /* Read the raw ELF version symbol information. */
1164 && verhdr->sh_size / sizeof (Elf_External_Versym) != symcount)
1166 (*_bfd_error_handler)
1167 (_("%s: version count (%ld) does not match symbol count (%ld)"),
1169 (long) (verhdr->sh_size / sizeof (Elf_External_Versym)),
1172 /* Slurp in the symbols without the version information,
1173 since that is more helpful than just quitting. */
1179 if (bfd_seek (abfd, verhdr->sh_offset, SEEK_SET) != 0)
1182 xverbuf = (Elf_External_Versym *) bfd_malloc (verhdr->sh_size);
1183 if (xverbuf == NULL && verhdr->sh_size != 0)
1186 if (bfd_bread ((PTR) xverbuf, verhdr->sh_size, abfd)
1191 /* Skip first symbol, which is a null dummy. */
1195 isymend = isymbuf + symcount;
1196 for (isym = isymbuf + 1, sym = symbase; isym < isymend; isym++, sym++)
1198 memcpy (&sym->internal_elf_sym, isym, sizeof (Elf_Internal_Sym));
1199 sym->symbol.the_bfd = abfd;
1201 sym->symbol.name = bfd_elf_string_from_elf_section (abfd,
1205 sym->symbol.value = isym->st_value;
1207 if (isym->st_shndx == SHN_UNDEF)
1209 sym->symbol.section = bfd_und_section_ptr;
1211 else if (isym->st_shndx < SHN_LORESERVE
1212 || isym->st_shndx > SHN_HIRESERVE)
1214 sym->symbol.section = section_from_elf_index (abfd,
1216 if (sym->symbol.section == NULL)
1218 /* This symbol is in a section for which we did not
1219 create a BFD section. Just use bfd_abs_section,
1220 although it is wrong. FIXME. */
1221 sym->symbol.section = bfd_abs_section_ptr;
1224 else if (isym->st_shndx == SHN_ABS)
1226 sym->symbol.section = bfd_abs_section_ptr;
1228 else if (isym->st_shndx == SHN_COMMON)
1230 sym->symbol.section = bfd_com_section_ptr;
1231 /* Elf puts the alignment into the `value' field, and
1232 the size into the `size' field. BFD wants to see the
1233 size in the value field, and doesn't care (at the
1234 moment) about the alignment. */
1235 sym->symbol.value = isym->st_size;
1238 sym->symbol.section = bfd_abs_section_ptr;
1240 /* If this is a relocateable file, then the symbol value is
1241 already section relative. */
1242 if ((abfd->flags & (EXEC_P | DYNAMIC)) != 0)
1243 sym->symbol.value -= sym->symbol.section->vma;
1245 switch (ELF_ST_BIND (isym->st_info))
1248 sym->symbol.flags |= BSF_LOCAL;
1251 if (isym->st_shndx != SHN_UNDEF && isym->st_shndx != SHN_COMMON)
1252 sym->symbol.flags |= BSF_GLOBAL;
1255 sym->symbol.flags |= BSF_WEAK;
1259 switch (ELF_ST_TYPE (isym->st_info))
1262 sym->symbol.flags |= BSF_SECTION_SYM | BSF_DEBUGGING;
1265 sym->symbol.flags |= BSF_FILE | BSF_DEBUGGING;
1268 sym->symbol.flags |= BSF_FUNCTION;
1271 sym->symbol.flags |= BSF_OBJECT;
1276 sym->symbol.flags |= BSF_DYNAMIC;
1280 Elf_Internal_Versym iversym;
1282 _bfd_elf_swap_versym_in (abfd, xver, &iversym);
1283 sym->version = iversym.vs_vers;
1287 /* Do some backend-specific processing on this symbol. */
1288 if (ebd->elf_backend_symbol_processing)
1289 (*ebd->elf_backend_symbol_processing) (abfd, &sym->symbol);
1293 /* Do some backend-specific processing on this symbol table. */
1294 if (ebd->elf_backend_symbol_table_processing)
1295 (*ebd->elf_backend_symbol_table_processing) (abfd, symbase, symcount);
1297 /* We rely on the zalloc to clear out the final symbol entry. */
1299 symcount = sym - symbase;
1301 /* Fill in the user's symbol pointer vector if needed. */
1309 *symptrs++ = &sym->symbol;
1312 *symptrs = 0; /* Final null pointer */
1315 if (xverbuf != NULL)
1317 if (isymbuf != NULL && hdr->contents != (unsigned char *) isymbuf)
1322 if (xverbuf != NULL)
1324 if (isymbuf != NULL && hdr->contents != (unsigned char *) isymbuf)
1329 /* Read relocations for ASECT from REL_HDR. There are RELOC_COUNT of
1333 elf_slurp_reloc_table_from_section (abfd, asect, rel_hdr, reloc_count,
1334 relents, symbols, dynamic)
1337 Elf_Internal_Shdr *rel_hdr;
1338 bfd_size_type reloc_count;
1343 struct elf_backend_data * const ebd = get_elf_backend_data (abfd);
1344 PTR allocated = NULL;
1345 bfd_byte *native_relocs;
1349 unsigned int symcount;
1351 allocated = (PTR) bfd_malloc (rel_hdr->sh_size);
1352 if (allocated == NULL)
1355 if (bfd_seek (abfd, rel_hdr->sh_offset, SEEK_SET) != 0
1356 || (bfd_bread (allocated, rel_hdr->sh_size, abfd)
1357 != rel_hdr->sh_size))
1360 native_relocs = (bfd_byte *) allocated;
1362 entsize = rel_hdr->sh_entsize;
1363 BFD_ASSERT (entsize == sizeof (Elf_External_Rel)
1364 || entsize == sizeof (Elf_External_Rela));
1367 symcount = bfd_get_dynamic_symcount (abfd);
1369 symcount = bfd_get_symcount (abfd);
1371 for (i = 0, relent = relents;
1373 i++, relent++, native_relocs += entsize)
1375 Elf_Internal_Rela rela;
1376 Elf_Internal_Rel rel;
1378 if (entsize == sizeof (Elf_External_Rela))
1379 elf_swap_reloca_in (abfd, (Elf_External_Rela *) native_relocs, &rela);
1382 elf_swap_reloc_in (abfd, (Elf_External_Rel *) native_relocs, &rel);
1383 rela.r_offset = rel.r_offset;
1384 rela.r_info = rel.r_info;
1388 /* The address of an ELF reloc is section relative for an object
1389 file, and absolute for an executable file or shared library.
1390 The address of a normal BFD reloc is always section relative,
1391 and the address of a dynamic reloc is absolute.. */
1392 if ((abfd->flags & (EXEC_P | DYNAMIC)) == 0 || dynamic)
1393 relent->address = rela.r_offset;
1395 relent->address = rela.r_offset - asect->vma;
1397 if (ELF_R_SYM (rela.r_info) == 0)
1398 relent->sym_ptr_ptr = bfd_abs_section_ptr->symbol_ptr_ptr;
1399 else if (ELF_R_SYM (rela.r_info) > symcount)
1401 (*_bfd_error_handler)
1402 (_("%s(%s): relocation %d has invalid symbol index %ld"),
1403 abfd->filename, asect->name, i, ELF_R_SYM (rela.r_info));
1404 relent->sym_ptr_ptr = bfd_abs_section.symbol_ptr_ptr;
1410 ps = symbols + ELF_R_SYM (rela.r_info) - 1;
1413 /* Canonicalize ELF section symbols. FIXME: Why? */
1414 if ((s->flags & BSF_SECTION_SYM) == 0)
1415 relent->sym_ptr_ptr = ps;
1417 relent->sym_ptr_ptr = s->section->symbol_ptr_ptr;
1420 relent->addend = rela.r_addend;
1422 if (entsize == sizeof (Elf_External_Rela))
1423 (*ebd->elf_info_to_howto) (abfd, relent, &rela);
1425 (*ebd->elf_info_to_howto_rel) (abfd, relent, &rel);
1428 if (allocated != NULL)
1434 if (allocated != NULL)
1439 /* Read in and swap the external relocs. */
1442 elf_slurp_reloc_table (abfd, asect, symbols, dynamic)
1448 struct bfd_elf_section_data * const d = elf_section_data (asect);
1449 Elf_Internal_Shdr *rel_hdr;
1450 Elf_Internal_Shdr *rel_hdr2;
1451 bfd_size_type reloc_count;
1452 bfd_size_type reloc_count2;
1456 if (asect->relocation != NULL)
1461 if ((asect->flags & SEC_RELOC) == 0
1462 || asect->reloc_count == 0)
1465 rel_hdr = &d->rel_hdr;
1466 reloc_count = NUM_SHDR_ENTRIES (rel_hdr);
1467 rel_hdr2 = d->rel_hdr2;
1468 reloc_count2 = (rel_hdr2 ? NUM_SHDR_ENTRIES (rel_hdr2) : 0);
1470 BFD_ASSERT (asect->reloc_count == reloc_count + reloc_count2);
1471 BFD_ASSERT (asect->rel_filepos == rel_hdr->sh_offset
1472 || (rel_hdr2 && asect->rel_filepos == rel_hdr2->sh_offset));
1477 /* Note that ASECT->RELOC_COUNT tends not to be accurate in this
1478 case because relocations against this section may use the
1479 dynamic symbol table, and in that case bfd_section_from_shdr
1480 in elf.c does not update the RELOC_COUNT. */
1481 if (asect->_raw_size == 0)
1484 rel_hdr = &d->this_hdr;
1485 reloc_count = NUM_SHDR_ENTRIES (rel_hdr);
1490 amt = (reloc_count + reloc_count2) * sizeof (arelent);
1491 relents = (arelent *) bfd_alloc (abfd, amt);
1492 if (relents == NULL)
1495 if (!elf_slurp_reloc_table_from_section (abfd, asect,
1496 rel_hdr, reloc_count,
1502 && !elf_slurp_reloc_table_from_section (abfd, asect,
1503 rel_hdr2, reloc_count2,
1504 relents + reloc_count,
1508 asect->relocation = relents;
1514 elf_debug_section (num, hdr)
1516 Elf_Internal_Shdr *hdr;
1518 fprintf (stderr, "\nSection#%d '%s' 0x%.8lx\n", num,
1519 hdr->bfd_section != NULL ? hdr->bfd_section->name : "",
1522 "sh_name = %ld\tsh_type = %ld\tsh_flags = %ld\n",
1523 (long) hdr->sh_name,
1524 (long) hdr->sh_type,
1525 (long) hdr->sh_flags);
1527 "sh_addr = %ld\tsh_offset = %ld\tsh_size = %ld\n",
1528 (long) hdr->sh_addr,
1529 (long) hdr->sh_offset,
1530 (long) hdr->sh_size);
1532 "sh_link = %ld\tsh_info = %ld\tsh_addralign = %ld\n",
1533 (long) hdr->sh_link,
1534 (long) hdr->sh_info,
1535 (long) hdr->sh_addralign);
1536 fprintf (stderr, "sh_entsize = %ld\n",
1537 (long) hdr->sh_entsize);
1542 elf_debug_file (ehdrp)
1543 Elf_Internal_Ehdr *ehdrp;
1545 fprintf (stderr, "e_entry = 0x%.8lx\n", (long) ehdrp->e_entry);
1546 fprintf (stderr, "e_phoff = %ld\n", (long) ehdrp->e_phoff);
1547 fprintf (stderr, "e_phnum = %ld\n", (long) ehdrp->e_phnum);
1548 fprintf (stderr, "e_phentsize = %ld\n", (long) ehdrp->e_phentsize);
1549 fprintf (stderr, "e_shoff = %ld\n", (long) ehdrp->e_shoff);
1550 fprintf (stderr, "e_shnum = %ld\n", (long) ehdrp->e_shnum);
1551 fprintf (stderr, "e_shentsize = %ld\n", (long) ehdrp->e_shentsize);
1555 elf_symbol_flags (flags)
1558 static char buffer[1024];
1561 if (flags & BSF_LOCAL)
1562 strcat (buffer, " local");
1564 if (flags & BSF_GLOBAL)
1565 strcat (buffer, " global");
1567 if (flags & BSF_DEBUGGING)
1568 strcat (buffer, " debug");
1570 if (flags & BSF_FUNCTION)
1571 strcat (buffer, " function");
1573 if (flags & BSF_KEEP)
1574 strcat (buffer, " keep");
1576 if (flags & BSF_KEEP_G)
1577 strcat (buffer, " keep_g");
1579 if (flags & BSF_WEAK)
1580 strcat (buffer, " weak");
1582 if (flags & BSF_SECTION_SYM)
1583 strcat (buffer, " section-sym");
1585 if (flags & BSF_OLD_COMMON)
1586 strcat (buffer, " old-common");
1588 if (flags & BSF_NOT_AT_END)
1589 strcat (buffer, " not-at-end");
1591 if (flags & BSF_CONSTRUCTOR)
1592 strcat (buffer, " constructor");
1594 if (flags & BSF_WARNING)
1595 strcat (buffer, " warning");
1597 if (flags & BSF_INDIRECT)
1598 strcat (buffer, " indirect");
1600 if (flags & BSF_FILE)
1601 strcat (buffer, " file");
1603 if (flags & DYNAMIC)
1604 strcat (buffer, " dynamic");
1606 if (flags & ~(BSF_LOCAL
1621 strcat (buffer, " unknown-bits");
1627 #include "elfcore.h"
1628 #include "elflink.h"
1630 /* Size-dependent data and functions. */
1631 const struct elf_size_info NAME(_bfd_elf,size_info) = {
1632 sizeof (Elf_External_Ehdr),
1633 sizeof (Elf_External_Phdr),
1634 sizeof (Elf_External_Shdr),
1635 sizeof (Elf_External_Rel),
1636 sizeof (Elf_External_Rela),
1637 sizeof (Elf_External_Sym),
1638 sizeof (Elf_External_Dyn),
1639 sizeof (Elf_External_Note),
1642 ARCH_SIZE, FILE_ALIGN,
1643 ELFCLASS, EV_CURRENT,
1644 elf_write_out_phdrs,
1645 elf_write_shdrs_and_ehdr,
1648 elf_swap_symbol_out,
1649 elf_slurp_reloc_table,
1650 elf_slurp_symbol_table,