1 /* ELF executable support for BFD.
2 Copyright 1991, 1992, 1993, 1994, 1995, 1996, 1997, 1998, 1999, 2000,
3 2001 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, src, shndx, dst)
208 const Elf_External_Sym *src;
209 const Elf_External_Sym_Shndx *shndx;
210 Elf_Internal_Sym *dst;
212 int signed_vma = get_elf_backend_data (abfd)->sign_extend_vma;
214 dst->st_name = H_GET_32 (abfd, src->st_name);
216 dst->st_value = H_GET_SIGNED_WORD (abfd, src->st_value);
218 dst->st_value = H_GET_WORD (abfd, src->st_value);
219 dst->st_size = H_GET_WORD (abfd, src->st_size);
220 dst->st_info = H_GET_8 (abfd, src->st_info);
221 dst->st_other = H_GET_8 (abfd, src->st_other);
222 dst->st_shndx = H_GET_16 (abfd, src->st_shndx);
223 if (dst->st_shndx == SHN_XINDEX)
227 dst->st_shndx = H_GET_32 (abfd, shndx->est_shndx);
231 /* Translate an ELF symbol in internal format into an ELF symbol in external
235 elf_swap_symbol_out (abfd, src, cdst, shndx)
237 const Elf_Internal_Sym *src;
242 Elf_External_Sym *dst = (Elf_External_Sym *) cdst;
243 H_PUT_32 (abfd, src->st_name, dst->st_name);
244 H_PUT_WORD (abfd, src->st_value, dst->st_value);
245 H_PUT_WORD (abfd, src->st_size, dst->st_size);
246 H_PUT_8 (abfd, src->st_info, dst->st_info);
247 H_PUT_8 (abfd, src->st_other, dst->st_other);
249 if (tmp > SHN_HIRESERVE)
253 H_PUT_32 (abfd, tmp, shndx);
256 H_PUT_16 (abfd, tmp, dst->st_shndx);
259 /* Translate an ELF file header in external format into an ELF file header in
263 elf_swap_ehdr_in (abfd, src, dst)
265 const Elf_External_Ehdr *src;
266 Elf_Internal_Ehdr *dst;
268 int signed_vma = get_elf_backend_data (abfd)->sign_extend_vma;
269 memcpy (dst->e_ident, src->e_ident, EI_NIDENT);
270 dst->e_type = H_GET_16 (abfd, src->e_type);
271 dst->e_machine = H_GET_16 (abfd, src->e_machine);
272 dst->e_version = H_GET_32 (abfd, src->e_version);
274 dst->e_entry = H_GET_SIGNED_WORD (abfd, src->e_entry);
276 dst->e_entry = H_GET_WORD (abfd, src->e_entry);
277 dst->e_phoff = H_GET_WORD (abfd, src->e_phoff);
278 dst->e_shoff = H_GET_WORD (abfd, src->e_shoff);
279 dst->e_flags = H_GET_32 (abfd, src->e_flags);
280 dst->e_ehsize = H_GET_16 (abfd, src->e_ehsize);
281 dst->e_phentsize = H_GET_16 (abfd, src->e_phentsize);
282 dst->e_phnum = H_GET_16 (abfd, src->e_phnum);
283 dst->e_shentsize = H_GET_16 (abfd, src->e_shentsize);
284 dst->e_shnum = H_GET_16 (abfd, src->e_shnum);
285 dst->e_shstrndx = H_GET_16 (abfd, src->e_shstrndx);
288 /* Translate an ELF file header in internal format into an ELF file header in
292 elf_swap_ehdr_out (abfd, src, dst)
294 const Elf_Internal_Ehdr *src;
295 Elf_External_Ehdr *dst;
298 int signed_vma = get_elf_backend_data (abfd)->sign_extend_vma;
299 memcpy (dst->e_ident, src->e_ident, EI_NIDENT);
300 /* note that all elements of dst are *arrays of unsigned char* already... */
301 H_PUT_16 (abfd, src->e_type, dst->e_type);
302 H_PUT_16 (abfd, src->e_machine, dst->e_machine);
303 H_PUT_32 (abfd, src->e_version, dst->e_version);
305 H_PUT_SIGNED_WORD (abfd, src->e_entry, dst->e_entry);
307 H_PUT_WORD (abfd, src->e_entry, dst->e_entry);
308 H_PUT_WORD (abfd, src->e_phoff, dst->e_phoff);
309 H_PUT_WORD (abfd, src->e_shoff, dst->e_shoff);
310 H_PUT_32 (abfd, src->e_flags, dst->e_flags);
311 H_PUT_16 (abfd, src->e_ehsize, dst->e_ehsize);
312 H_PUT_16 (abfd, src->e_phentsize, dst->e_phentsize);
313 H_PUT_16 (abfd, src->e_phnum, dst->e_phnum);
314 H_PUT_16 (abfd, src->e_shentsize, dst->e_shentsize);
316 if (tmp >= SHN_LORESERVE)
318 H_PUT_16 (abfd, tmp, dst->e_shnum);
319 tmp = src->e_shstrndx;
320 if (tmp >= SHN_LORESERVE)
322 H_PUT_16 (abfd, tmp, dst->e_shstrndx);
325 /* Translate an ELF section header table entry in external format into an
326 ELF section header table entry in internal format. */
329 elf_swap_shdr_in (abfd, src, dst)
331 const Elf_External_Shdr *src;
332 Elf_Internal_Shdr *dst;
334 int signed_vma = get_elf_backend_data (abfd)->sign_extend_vma;
336 dst->sh_name = H_GET_32 (abfd, src->sh_name);
337 dst->sh_type = H_GET_32 (abfd, src->sh_type);
338 dst->sh_flags = H_GET_WORD (abfd, src->sh_flags);
340 dst->sh_addr = H_GET_SIGNED_WORD (abfd, src->sh_addr);
342 dst->sh_addr = H_GET_WORD (abfd, src->sh_addr);
343 dst->sh_offset = H_GET_WORD (abfd, src->sh_offset);
344 dst->sh_size = H_GET_WORD (abfd, src->sh_size);
345 dst->sh_link = H_GET_32 (abfd, src->sh_link);
346 dst->sh_info = H_GET_32 (abfd, src->sh_info);
347 dst->sh_addralign = H_GET_WORD (abfd, src->sh_addralign);
348 dst->sh_entsize = H_GET_WORD (abfd, src->sh_entsize);
349 dst->bfd_section = NULL;
350 dst->contents = NULL;
353 /* Translate an ELF section header table entry in internal format into an
354 ELF section header table entry in external format. */
357 elf_swap_shdr_out (abfd, src, dst)
359 const Elf_Internal_Shdr *src;
360 Elf_External_Shdr *dst;
362 /* note that all elements of dst are *arrays of unsigned char* already... */
363 H_PUT_32 (abfd, src->sh_name, dst->sh_name);
364 H_PUT_32 (abfd, src->sh_type, dst->sh_type);
365 H_PUT_WORD (abfd, src->sh_flags, dst->sh_flags);
366 H_PUT_WORD (abfd, src->sh_addr, dst->sh_addr);
367 H_PUT_WORD (abfd, src->sh_offset, dst->sh_offset);
368 H_PUT_WORD (abfd, src->sh_size, dst->sh_size);
369 H_PUT_32 (abfd, src->sh_link, dst->sh_link);
370 H_PUT_32 (abfd, src->sh_info, dst->sh_info);
371 H_PUT_WORD (abfd, src->sh_addralign, dst->sh_addralign);
372 H_PUT_WORD (abfd, src->sh_entsize, dst->sh_entsize);
375 /* Translate an ELF program header table entry in external format into an
376 ELF program header table entry in internal format. */
379 elf_swap_phdr_in (abfd, src, dst)
381 const Elf_External_Phdr *src;
382 Elf_Internal_Phdr *dst;
384 int signed_vma = get_elf_backend_data (abfd)->sign_extend_vma;
386 dst->p_type = H_GET_32 (abfd, src->p_type);
387 dst->p_flags = H_GET_32 (abfd, src->p_flags);
388 dst->p_offset = H_GET_WORD (abfd, src->p_offset);
391 dst->p_vaddr = H_GET_SIGNED_WORD (abfd, src->p_vaddr);
392 dst->p_paddr = H_GET_SIGNED_WORD (abfd, src->p_paddr);
396 dst->p_vaddr = H_GET_WORD (abfd, src->p_vaddr);
397 dst->p_paddr = H_GET_WORD (abfd, src->p_paddr);
399 dst->p_filesz = H_GET_WORD (abfd, src->p_filesz);
400 dst->p_memsz = H_GET_WORD (abfd, src->p_memsz);
401 dst->p_align = H_GET_WORD (abfd, src->p_align);
405 elf_swap_phdr_out (abfd, src, dst)
407 const Elf_Internal_Phdr *src;
408 Elf_External_Phdr *dst;
410 /* note that all elements of dst are *arrays of unsigned char* already... */
411 H_PUT_32 (abfd, src->p_type, dst->p_type);
412 H_PUT_WORD (abfd, src->p_offset, dst->p_offset);
413 H_PUT_WORD (abfd, src->p_vaddr, dst->p_vaddr);
414 H_PUT_WORD (abfd, src->p_paddr, dst->p_paddr);
415 H_PUT_WORD (abfd, src->p_filesz, dst->p_filesz);
416 H_PUT_WORD (abfd, src->p_memsz, dst->p_memsz);
417 H_PUT_32 (abfd, src->p_flags, dst->p_flags);
418 H_PUT_WORD (abfd, src->p_align, dst->p_align);
421 /* Translate an ELF reloc from external format to internal format. */
423 elf_swap_reloc_in (abfd, src, dst)
425 const Elf_External_Rel *src;
426 Elf_Internal_Rel *dst;
428 dst->r_offset = H_GET_WORD (abfd, src->r_offset);
429 dst->r_info = H_GET_WORD (abfd, src->r_info);
433 elf_swap_reloca_in (abfd, src, dst)
435 const Elf_External_Rela *src;
436 Elf_Internal_Rela *dst;
438 dst->r_offset = H_GET_WORD (abfd, src->r_offset);
439 dst->r_info = H_GET_WORD (abfd, src->r_info);
440 dst->r_addend = H_GET_SIGNED_WORD (abfd, src->r_addend);
443 /* Translate an ELF reloc from internal format to external format. */
445 elf_swap_reloc_out (abfd, src, dst)
447 const Elf_Internal_Rel *src;
448 Elf_External_Rel *dst;
450 H_PUT_WORD (abfd, src->r_offset, dst->r_offset);
451 H_PUT_WORD (abfd, src->r_info, dst->r_info);
455 elf_swap_reloca_out (abfd, src, dst)
457 const Elf_Internal_Rela *src;
458 Elf_External_Rela *dst;
460 H_PUT_WORD (abfd, src->r_offset, dst->r_offset);
461 H_PUT_WORD (abfd, src->r_info, dst->r_info);
462 H_PUT_SIGNED_WORD (abfd, src->r_addend, dst->r_addend);
466 elf_swap_dyn_in (abfd, p, dst)
469 Elf_Internal_Dyn *dst;
471 const Elf_External_Dyn *src = (const Elf_External_Dyn *) p;
473 dst->d_tag = H_GET_WORD (abfd, src->d_tag);
474 dst->d_un.d_val = H_GET_WORD (abfd, src->d_un.d_val);
478 elf_swap_dyn_out (abfd, src, p)
480 const Elf_Internal_Dyn *src;
483 Elf_External_Dyn *dst = (Elf_External_Dyn *) p;
485 H_PUT_WORD (abfd, src->d_tag, dst->d_tag);
486 H_PUT_WORD (abfd, src->d_un.d_val, dst->d_un.d_val);
489 /* ELF .o/exec file reading */
491 /* Begin processing a given object.
493 First we validate the file by reading in the ELF header and checking
496 static INLINE boolean
498 Elf_External_Ehdr *x_ehdrp;
500 return ((x_ehdrp->e_ident[EI_MAG0] == ELFMAG0)
501 && (x_ehdrp->e_ident[EI_MAG1] == ELFMAG1)
502 && (x_ehdrp->e_ident[EI_MAG2] == ELFMAG2)
503 && (x_ehdrp->e_ident[EI_MAG3] == ELFMAG3));
506 /* Check to see if the file associated with ABFD matches the target vector
509 Note that we may be called several times with the same ABFD, but different
510 target vectors, most of which will not match. We have to avoid leaving
511 any side effects in ABFD, or any data it points to (like tdata), if the
512 file does not match the target vector. */
518 Elf_External_Ehdr x_ehdr; /* Elf file header, external form */
519 Elf_Internal_Ehdr *i_ehdrp; /* Elf file header, internal form */
520 Elf_External_Shdr x_shdr; /* Section header table entry, external form */
521 Elf_Internal_Shdr i_shdr;
522 Elf_Internal_Shdr *i_shdrp = NULL; /* Section header table, internal form */
523 unsigned int shindex;
524 char *shstrtab; /* Internal copy of section header stringtab */
525 struct elf_backend_data *ebd;
526 struct elf_obj_tdata *preserved_tdata = elf_tdata (abfd);
527 struct sec *preserved_sections = abfd->sections;
528 unsigned int preserved_section_count = abfd->section_count;
529 enum bfd_architecture previous_arch = bfd_get_arch (abfd);
530 unsigned long previous_mach = bfd_get_mach (abfd);
531 struct elf_obj_tdata *new_tdata = NULL;
535 /* Clear section information, since there might be a recognized bfd that
536 we now check if we can replace, and we don't want to append to it. */
537 abfd->sections = NULL;
538 abfd->section_count = 0;
540 /* Read in the ELF header in external format. */
542 if (bfd_bread ((PTR) & x_ehdr, (bfd_size_type) sizeof (x_ehdr), abfd)
545 if (bfd_get_error () != bfd_error_system_call)
546 goto got_wrong_format_error;
551 /* Now check to see if we have a valid ELF file, and one that BFD can
552 make use of. The magic number must match, the address size ('class')
553 and byte-swapping must match our XVEC entry, and it must have a
554 section header table (FIXME: See comments re sections at top of this
557 if ((elf_file_p (&x_ehdr) == false) ||
558 (x_ehdr.e_ident[EI_VERSION] != EV_CURRENT) ||
559 (x_ehdr.e_ident[EI_CLASS] != ELFCLASS))
560 goto got_wrong_format_error;
562 /* Check that file's byte order matches xvec's */
563 switch (x_ehdr.e_ident[EI_DATA])
565 case ELFDATA2MSB: /* Big-endian */
566 if (! bfd_header_big_endian (abfd))
567 goto got_wrong_format_error;
569 case ELFDATA2LSB: /* Little-endian */
570 if (! bfd_header_little_endian (abfd))
571 goto got_wrong_format_error;
573 case ELFDATANONE: /* No data encoding specified */
574 default: /* Unknown data encoding specified */
575 goto got_wrong_format_error;
578 /* Allocate an instance of the elf_obj_tdata structure and hook it up to
579 the tdata pointer in the bfd. */
581 amt = sizeof (struct elf_obj_tdata);
582 new_tdata = (struct elf_obj_tdata *) bfd_zalloc (abfd, amt);
583 if (new_tdata == NULL)
585 elf_tdata (abfd) = new_tdata;
587 /* Now that we know the byte order, swap in the rest of the header */
588 i_ehdrp = elf_elfheader (abfd);
589 elf_swap_ehdr_in (abfd, &x_ehdr, i_ehdrp);
591 elf_debug_file (i_ehdrp);
594 /* Reject ET_CORE (header indicates core file, not object file) */
595 if (i_ehdrp->e_type == ET_CORE)
596 goto got_wrong_format_error;
598 /* If this is a relocatable file and there is no section header
599 table, then we're hosed. */
600 if (i_ehdrp->e_shoff == 0 && i_ehdrp->e_type == ET_REL)
601 goto got_wrong_format_error;
603 /* As a simple sanity check, verify that the what BFD thinks is the
604 size of each section header table entry actually matches the size
605 recorded in the file, but only if there are any sections. */
606 if (i_ehdrp->e_shentsize != sizeof (x_shdr) && i_ehdrp->e_shnum != 0)
607 goto got_wrong_format_error;
609 ebd = get_elf_backend_data (abfd);
611 /* Check that the ELF e_machine field matches what this particular
612 BFD format expects. */
613 if (ebd->elf_machine_code != i_ehdrp->e_machine
614 && (ebd->elf_machine_alt1 == 0 || i_ehdrp->e_machine != ebd->elf_machine_alt1)
615 && (ebd->elf_machine_alt2 == 0 || i_ehdrp->e_machine != ebd->elf_machine_alt2))
617 const bfd_target * const *target_ptr;
619 if (ebd->elf_machine_code != EM_NONE)
620 goto got_wrong_format_error;
622 /* This is the generic ELF target. Let it match any ELF target
623 for which we do not have a specific backend. */
624 for (target_ptr = bfd_target_vector; *target_ptr != NULL; target_ptr++)
626 struct elf_backend_data *back;
628 if ((*target_ptr)->flavour != bfd_target_elf_flavour)
630 back = (struct elf_backend_data *) (*target_ptr)->backend_data;
631 if (back->elf_machine_code == i_ehdrp->e_machine
632 || (back->elf_machine_alt1 != 0
633 && back->elf_machine_alt1 == i_ehdrp->e_machine)
634 || (back->elf_machine_alt2 != 0
635 && back->elf_machine_alt2 == i_ehdrp->e_machine))
637 /* target_ptr is an ELF backend which matches this
638 object file, so reject the generic ELF target. */
639 goto got_wrong_format_error;
644 if (i_ehdrp->e_type == ET_EXEC)
645 abfd->flags |= EXEC_P;
646 else if (i_ehdrp->e_type == ET_DYN)
647 abfd->flags |= DYNAMIC;
649 if (i_ehdrp->e_phnum > 0)
650 abfd->flags |= D_PAGED;
652 if (! bfd_default_set_arch_mach (abfd, ebd->arch, 0))
654 /* It's OK if this fails for the generic target. */
655 if (ebd->elf_machine_code != EM_NONE)
659 /* Remember the entry point specified in the ELF file header. */
660 bfd_set_start_address (abfd, i_ehdrp->e_entry);
662 /* Seek to the section header table in the file. */
663 if (bfd_seek (abfd, (file_ptr) i_ehdrp->e_shoff, SEEK_SET) != 0)
666 /* Read the first section header at index 0, and convert to internal
668 if (bfd_bread ((PTR) & x_shdr, (bfd_size_type) sizeof x_shdr, abfd)
671 elf_swap_shdr_in (abfd, &x_shdr, &i_shdr);
673 /* If the section count is zero, the actual count is in the first
675 if (i_ehdrp->e_shnum == SHN_UNDEF)
676 i_ehdrp->e_shnum = i_shdr.sh_size;
678 /* And similarly for the string table index. */
679 if (i_ehdrp->e_shstrndx == SHN_XINDEX)
680 i_ehdrp->e_shstrndx = i_shdr.sh_link;
682 /* Allocate space for a copy of the section header table in
684 if (i_ehdrp->e_shnum != 0)
686 Elf_Internal_Shdr *shdrp;
687 unsigned int num_sec;
689 amt = sizeof (*i_shdrp) * i_ehdrp->e_shnum;
690 i_shdrp = (Elf_Internal_Shdr *) bfd_alloc (abfd, amt);
693 num_sec = i_ehdrp->e_shnum;
694 if (num_sec > SHN_LORESERVE)
695 num_sec += SHN_HIRESERVE + 1 - SHN_LORESERVE;
696 elf_numsections (abfd) = num_sec;
697 amt = sizeof (i_shdrp) * num_sec;
698 elf_elfsections (abfd) = (Elf_Internal_Shdr **) bfd_alloc (abfd, amt);
699 if (!elf_elfsections (abfd))
702 memcpy (i_shdrp, &i_shdr, sizeof (*i_shdrp));
705 if (num_sec > SHN_LORESERVE)
707 for ( ; shindex < SHN_LORESERVE; shindex++)
708 elf_elfsections (abfd)[shindex] = shdrp++;
709 for ( ; shindex < SHN_HIRESERVE + 1; shindex++)
710 elf_elfsections (abfd)[shindex] = i_shdrp;
712 for ( ; shindex < num_sec; shindex++)
713 elf_elfsections (abfd)[shindex] = shdrp++;
716 /* Read in the rest of the section header table and convert it to
718 for (shindex = 1; shindex < i_ehdrp->e_shnum; shindex++)
720 if (bfd_bread ((PTR) & x_shdr, (bfd_size_type) sizeof x_shdr, abfd)
723 elf_swap_shdr_in (abfd, &x_shdr, i_shdrp + shindex);
725 /* If the section is loaded, but not page aligned, clear
727 if (i_shdrp[shindex].sh_size != 0
728 && (i_shdrp[shindex].sh_flags & SHF_ALLOC) != 0
729 && i_shdrp[shindex].sh_type != SHT_NOBITS
730 && (((i_shdrp[shindex].sh_addr - i_shdrp[shindex].sh_offset)
733 abfd->flags &= ~D_PAGED;
735 if (i_ehdrp->e_shstrndx)
737 if (! bfd_section_from_shdr (abfd, i_ehdrp->e_shstrndx))
741 /* Read in the program headers. */
742 if (i_ehdrp->e_phnum == 0)
743 elf_tdata (abfd)->phdr = NULL;
746 Elf_Internal_Phdr *i_phdr;
749 amt = i_ehdrp->e_phnum * sizeof (Elf_Internal_Phdr);
750 elf_tdata (abfd)->phdr = (Elf_Internal_Phdr *) bfd_alloc (abfd, amt);
751 if (elf_tdata (abfd)->phdr == NULL)
753 if (bfd_seek (abfd, (file_ptr) i_ehdrp->e_phoff, SEEK_SET) != 0)
755 i_phdr = elf_tdata (abfd)->phdr;
756 for (i = 0; i < i_ehdrp->e_phnum; i++, i_phdr++)
758 Elf_External_Phdr x_phdr;
760 if (bfd_bread ((PTR) &x_phdr, (bfd_size_type) sizeof x_phdr, abfd)
763 elf_swap_phdr_in (abfd, &x_phdr, i_phdr);
767 /* Read in the string table containing the names of the sections. We
768 will need the base pointer to this table later. */
769 /* We read this inline now, so that we don't have to go through
770 bfd_section_from_shdr with it (since this particular strtab is
771 used to find all of the ELF section names.) */
773 if (i_ehdrp->e_shstrndx != 0)
775 unsigned int num_sec;
777 shstrtab = bfd_elf_get_str_section (abfd, i_ehdrp->e_shstrndx);
781 /* Once all of the section headers have been read and converted, we
782 can start processing them. Note that the first section header is
783 a dummy placeholder entry, so we ignore it. */
784 num_sec = elf_numsections (abfd);
785 for (shindex = 1; shindex < num_sec; shindex++)
787 if (! bfd_section_from_shdr (abfd, shindex))
789 if (shindex == SHN_LORESERVE - 1)
790 shindex += SHN_HIRESERVE + 1 - SHN_LORESERVE;
794 /* Let the backend double check the format and override global
796 if (ebd->elf_backend_object_p)
798 if ((*ebd->elf_backend_object_p) (abfd) == false)
799 goto got_wrong_format_error;
802 /* If we have created any reloc sections that are associated with
803 debugging sections, mark the reloc sections as debugging as well. */
804 for (s = abfd->sections; s != NULL; s = s->next)
806 if ((elf_section_data (s)->this_hdr.sh_type == SHT_REL
807 || elf_section_data (s)->this_hdr.sh_type == SHT_RELA)
808 && elf_section_data (s)->this_hdr.sh_info > 0)
810 unsigned long targ_index;
813 targ_index = elf_section_data (s)->this_hdr.sh_info;
814 targ_sec = bfd_section_from_elf_index (abfd, targ_index);
816 && (targ_sec->flags & SEC_DEBUGGING) != 0)
817 s->flags |= SEC_DEBUGGING;
823 got_wrong_format_error:
824 /* There is way too much undoing of half-known state here. The caller,
825 bfd_check_format_matches, really shouldn't iterate on live bfd's to
826 check match/no-match like it does. We have to rely on that a call to
827 bfd_default_set_arch_mach with the previously known mach, undoes what
828 was done by the first bfd_default_set_arch_mach (with mach 0) here.
829 For this to work, only elf-data and the mach may be changed by the
830 target-specific elf_backend_object_p function. Note that saving the
831 whole bfd here and restoring it would be even worse; the first thing
832 you notice is that the cached bfd file position gets out of sync. */
833 bfd_default_set_arch_mach (abfd, previous_arch, previous_mach);
834 bfd_set_error (bfd_error_wrong_format);
836 if (new_tdata != NULL)
837 bfd_release (abfd, new_tdata);
838 elf_tdata (abfd) = preserved_tdata;
839 abfd->sections = preserved_sections;
840 abfd->section_count = preserved_section_count;
844 /* ELF .o/exec file writing */
846 /* Write out the relocs. */
849 elf_write_relocs (abfd, sec, data)
854 boolean *failedp = (boolean *) data;
855 Elf_Internal_Shdr *rela_hdr;
856 Elf_External_Rela *outbound_relocas;
857 Elf_External_Rel *outbound_relocs;
860 asymbol *last_sym = 0;
861 int last_sym_idx = 0;
863 /* If we have already failed, don't do anything. */
867 if ((sec->flags & SEC_RELOC) == 0)
870 /* The linker backend writes the relocs out itself, and sets the
871 reloc_count field to zero to inhibit writing them here. Also,
872 sometimes the SEC_RELOC flag gets set even when there aren't any
874 if (sec->reloc_count == 0)
877 rela_hdr = &elf_section_data (sec)->rel_hdr;
879 rela_hdr->sh_size = rela_hdr->sh_entsize * sec->reloc_count;
880 rela_hdr->contents = (PTR) bfd_alloc (abfd, rela_hdr->sh_size);
881 if (rela_hdr->contents == NULL)
887 /* Figure out whether the relocations are RELA or REL relocations. */
888 if (rela_hdr->sh_type == SHT_RELA)
890 else if (rela_hdr->sh_type == SHT_REL)
893 /* Every relocation section should be either an SHT_RELA or an
897 /* orelocation has the data, reloc_count has the count... */
900 outbound_relocas = (Elf_External_Rela *) rela_hdr->contents;
902 for (idx = 0; idx < sec->reloc_count; idx++)
904 Elf_Internal_Rela dst_rela;
905 Elf_External_Rela *src_rela;
910 ptr = sec->orelocation[idx];
911 src_rela = outbound_relocas + idx;
913 /* The address of an ELF reloc is section relative for an object
914 file, and absolute for an executable file or shared library.
915 The address of a BFD reloc is always section relative. */
916 if ((abfd->flags & (EXEC_P | DYNAMIC)) == 0)
917 dst_rela.r_offset = ptr->address;
919 dst_rela.r_offset = ptr->address + sec->vma;
921 sym = *ptr->sym_ptr_ptr;
924 else if (bfd_is_abs_section (sym->section) && sym->value == 0)
929 n = _bfd_elf_symbol_from_bfd_symbol (abfd, &sym);
938 if ((*ptr->sym_ptr_ptr)->the_bfd != NULL
939 && (*ptr->sym_ptr_ptr)->the_bfd->xvec != abfd->xvec
940 && ! _bfd_elf_validate_reloc (abfd, ptr))
946 dst_rela.r_info = ELF_R_INFO (n, ptr->howto->type);
948 dst_rela.r_addend = ptr->addend;
949 elf_swap_reloca_out (abfd, &dst_rela, src_rela);
953 /* REL relocations */
955 outbound_relocs = (Elf_External_Rel *) rela_hdr->contents;
957 for (idx = 0; idx < sec->reloc_count; idx++)
959 Elf_Internal_Rel dst_rel;
960 Elf_External_Rel *src_rel;
965 ptr = sec->orelocation[idx];
966 sym = *ptr->sym_ptr_ptr;
967 src_rel = outbound_relocs + idx;
969 /* The address of an ELF reloc is section relative for an object
970 file, and absolute for an executable file or shared library.
971 The address of a BFD reloc is always section relative. */
972 if ((abfd->flags & (EXEC_P | DYNAMIC)) == 0)
973 dst_rel.r_offset = ptr->address;
975 dst_rel.r_offset = ptr->address + sec->vma;
979 else if (bfd_is_abs_section (sym->section) && sym->value == 0)
984 n = _bfd_elf_symbol_from_bfd_symbol (abfd, &sym);
993 if ((*ptr->sym_ptr_ptr)->the_bfd != NULL
994 && (*ptr->sym_ptr_ptr)->the_bfd->xvec != abfd->xvec
995 && ! _bfd_elf_validate_reloc (abfd, ptr))
1001 dst_rel.r_info = ELF_R_INFO (n, ptr->howto->type);
1003 elf_swap_reloc_out (abfd, &dst_rel, src_rel);
1008 /* Write out the program headers. */
1011 elf_write_out_phdrs (abfd, phdr, count)
1013 const Elf_Internal_Phdr *phdr;
1018 Elf_External_Phdr extphdr;
1019 elf_swap_phdr_out (abfd, phdr, &extphdr);
1020 if (bfd_bwrite (&extphdr, (bfd_size_type) sizeof (Elf_External_Phdr),
1021 abfd) != sizeof (Elf_External_Phdr))
1028 /* Write out the section headers and the ELF file header. */
1031 elf_write_shdrs_and_ehdr (abfd)
1034 Elf_External_Ehdr x_ehdr; /* Elf file header, external form */
1035 Elf_Internal_Ehdr *i_ehdrp; /* Elf file header, internal form */
1036 Elf_External_Shdr *x_shdrp; /* Section header table, external form */
1037 Elf_Internal_Shdr **i_shdrp; /* Section header table, internal form */
1041 i_ehdrp = elf_elfheader (abfd);
1042 i_shdrp = elf_elfsections (abfd);
1044 /* swap the header before spitting it out... */
1047 elf_debug_file (i_ehdrp);
1049 elf_swap_ehdr_out (abfd, i_ehdrp, &x_ehdr);
1050 amt = sizeof (x_ehdr);
1051 if (bfd_seek (abfd, (file_ptr) 0, SEEK_SET) != 0
1052 || bfd_bwrite ((PTR) & x_ehdr, amt, abfd) != amt)
1055 /* Some fields in the first section header handle overflow of ehdr
1057 if (i_ehdrp->e_shnum >= SHN_LORESERVE)
1058 i_shdrp[0]->sh_size = i_ehdrp->e_shnum;
1059 if (i_ehdrp->e_shstrndx >= SHN_LORESERVE)
1060 i_shdrp[0]->sh_link = i_ehdrp->e_shstrndx;
1062 /* at this point we've concocted all the ELF sections... */
1063 amt = i_ehdrp->e_shnum;
1064 amt *= sizeof (*x_shdrp);
1065 x_shdrp = (Elf_External_Shdr *) bfd_alloc (abfd, amt);
1069 for (count = 0; count < i_ehdrp->e_shnum; i_shdrp++, count++)
1072 elf_debug_section (count, *i_shdrp);
1074 elf_swap_shdr_out (abfd, *i_shdrp, x_shdrp + count);
1076 if (count == SHN_LORESERVE - 1)
1077 i_shdrp += SHN_HIRESERVE + 1 - SHN_LORESERVE;
1079 if (bfd_seek (abfd, (file_ptr) i_ehdrp->e_shoff, SEEK_SET) != 0
1080 || bfd_bwrite ((PTR) x_shdrp, amt, abfd) != amt)
1083 /* need to dump the string table too... */
1089 elf_slurp_symbol_table (abfd, symptrs, dynamic)
1091 asymbol **symptrs; /* Buffer for generated bfd symbols */
1094 Elf_Internal_Shdr *hdr;
1095 Elf_Internal_Shdr *verhdr;
1096 unsigned long symcount; /* Number of external ELF symbols */
1097 elf_symbol_type *sym; /* Pointer to current bfd symbol */
1098 elf_symbol_type *symbase; /* Buffer for generated bfd symbols */
1099 Elf_Internal_Sym i_sym;
1100 Elf_External_Sym *x_symp = NULL;
1101 Elf_External_Sym_Shndx *x_shndx = NULL;
1102 Elf_External_Versym *x_versymp = NULL;
1105 /* Read each raw ELF symbol, converting from external ELF form to
1106 internal ELF form, and then using the information to create a
1107 canonical bfd symbol table entry.
1109 Note that we allocate the initial bfd canonical symbol buffer
1110 based on a one-to-one mapping of the ELF symbols to canonical
1111 symbols. We actually use all the ELF symbols, so there will be no
1112 space left over at the end. When we have all the symbols, we
1113 build the caller's pointer vector. */
1117 Elf_Internal_Shdr *shndx_hdr;
1119 hdr = &elf_tdata (abfd)->symtab_hdr;
1120 shndx_hdr = &elf_tdata (abfd)->symtab_shndx_hdr;
1123 /* If we have a SHT_SYMTAB_SHNDX section for the symbol table,
1124 read the raw contents. */
1125 if (elf_elfsections (abfd)[shndx_hdr->sh_link] == hdr)
1127 amt = shndx_hdr->sh_size;
1128 x_shndx = (Elf_External_Sym_Shndx *) bfd_malloc (amt);
1130 || bfd_seek (abfd, shndx_hdr->sh_offset, SEEK_SET) != 0
1131 || bfd_bread ((PTR) x_shndx, amt, abfd) != amt)
1137 hdr = &elf_tdata (abfd)->dynsymtab_hdr;
1138 if (elf_dynversym (abfd) == 0)
1141 verhdr = &elf_tdata (abfd)->dynversym_hdr;
1142 if ((elf_tdata (abfd)->dynverdef_section != 0
1143 && elf_tdata (abfd)->verdef == NULL)
1144 || (elf_tdata (abfd)->dynverref_section != 0
1145 && elf_tdata (abfd)->verref == NULL))
1147 if (! _bfd_elf_slurp_version_tables (abfd))
1152 if (bfd_seek (abfd, hdr->sh_offset, SEEK_SET) != 0)
1155 symcount = hdr->sh_size / sizeof (Elf_External_Sym);
1158 sym = symbase = NULL;
1163 if (bfd_seek (abfd, hdr->sh_offset, SEEK_SET) != 0)
1167 amt *= sizeof (elf_symbol_type);
1168 symbase = (elf_symbol_type *) bfd_zalloc (abfd, amt);
1169 if (symbase == (elf_symbol_type *) NULL)
1173 /* Temporarily allocate room for the raw ELF symbols. */
1175 amt *= sizeof (Elf_External_Sym);
1176 x_symp = (Elf_External_Sym *) bfd_malloc (amt);
1180 if (bfd_bread ((PTR) x_symp, amt, abfd) != amt)
1183 /* Read the raw ELF version symbol information. */
1186 && verhdr->sh_size / sizeof (Elf_External_Versym) != symcount)
1188 (*_bfd_error_handler)
1189 (_("%s: version count (%ld) does not match symbol count (%ld)"),
1191 (long) (verhdr->sh_size / sizeof (Elf_External_Versym)),
1194 /* Slurp in the symbols without the version information,
1195 since that is more helpful than just quitting. */
1201 if (bfd_seek (abfd, verhdr->sh_offset, SEEK_SET) != 0)
1204 x_versymp = (Elf_External_Versym *) bfd_malloc (verhdr->sh_size);
1205 if (x_versymp == NULL && verhdr->sh_size != 0)
1208 if (bfd_bread ((PTR) x_versymp, verhdr->sh_size, abfd)
1213 /* Skip first symbol, which is a null dummy. */
1214 for (i = 1; i < symcount; i++)
1216 elf_swap_symbol_in (abfd, x_symp + i,
1217 x_shndx + (x_shndx != NULL ? i : 0), &i_sym);
1218 memcpy (&sym->internal_elf_sym, &i_sym, sizeof (Elf_Internal_Sym));
1219 #ifdef ELF_KEEP_EXTSYM
1220 memcpy (&sym->native_elf_sym, x_symp + i, sizeof (Elf_External_Sym));
1222 sym->symbol.the_bfd = abfd;
1224 sym->symbol.name = bfd_elf_string_from_elf_section (abfd,
1228 sym->symbol.value = i_sym.st_value;
1230 if (i_sym.st_shndx == SHN_UNDEF)
1232 sym->symbol.section = bfd_und_section_ptr;
1234 else if (i_sym.st_shndx < SHN_LORESERVE
1235 || i_sym.st_shndx > SHN_HIRESERVE)
1237 sym->symbol.section = section_from_elf_index (abfd,
1239 if (sym->symbol.section == NULL)
1241 /* This symbol is in a section for which we did not
1242 create a BFD section. Just use bfd_abs_section,
1243 although it is wrong. FIXME. */
1244 sym->symbol.section = bfd_abs_section_ptr;
1247 else if (i_sym.st_shndx == SHN_ABS)
1249 sym->symbol.section = bfd_abs_section_ptr;
1251 else if (i_sym.st_shndx == SHN_COMMON)
1253 sym->symbol.section = bfd_com_section_ptr;
1254 /* Elf puts the alignment into the `value' field, and
1255 the size into the `size' field. BFD wants to see the
1256 size in the value field, and doesn't care (at the
1257 moment) about the alignment. */
1258 sym->symbol.value = i_sym.st_size;
1261 sym->symbol.section = bfd_abs_section_ptr;
1263 /* If this is a relocateable file, then the symbol value is
1264 already section relative. */
1265 if ((abfd->flags & (EXEC_P | DYNAMIC)) != 0)
1266 sym->symbol.value -= sym->symbol.section->vma;
1268 switch (ELF_ST_BIND (i_sym.st_info))
1271 sym->symbol.flags |= BSF_LOCAL;
1274 if (i_sym.st_shndx != SHN_UNDEF
1275 && i_sym.st_shndx != SHN_COMMON)
1276 sym->symbol.flags |= BSF_GLOBAL;
1279 sym->symbol.flags |= BSF_WEAK;
1283 switch (ELF_ST_TYPE (i_sym.st_info))
1286 sym->symbol.flags |= BSF_SECTION_SYM | BSF_DEBUGGING;
1289 sym->symbol.flags |= BSF_FILE | BSF_DEBUGGING;
1292 sym->symbol.flags |= BSF_FUNCTION;
1295 sym->symbol.flags |= BSF_OBJECT;
1300 sym->symbol.flags |= BSF_DYNAMIC;
1302 if (x_versymp != NULL)
1304 Elf_Internal_Versym iversym;
1306 _bfd_elf_swap_versym_in (abfd, x_versymp + i, &iversym);
1307 sym->version = iversym.vs_vers;
1310 /* Do some backend-specific processing on this symbol. */
1312 struct elf_backend_data *ebd = get_elf_backend_data (abfd);
1313 if (ebd->elf_backend_symbol_processing)
1314 (*ebd->elf_backend_symbol_processing) (abfd, &sym->symbol);
1321 /* Do some backend-specific processing on this symbol table. */
1323 struct elf_backend_data *ebd = get_elf_backend_data (abfd);
1324 if (ebd->elf_backend_symbol_table_processing)
1325 (*ebd->elf_backend_symbol_table_processing) (abfd, symbase, symcount);
1328 /* We rely on the zalloc to clear out the final symbol entry. */
1330 symcount = sym - symbase;
1332 /* Fill in the user's symbol pointer vector if needed. */
1340 *symptrs++ = &sym->symbol;
1343 *symptrs = 0; /* Final null pointer */
1346 if (x_shndx != NULL)
1348 if (x_versymp != NULL)
1355 if (x_shndx != NULL)
1357 if (x_versymp != NULL)
1364 /* Read relocations for ASECT from REL_HDR. There are RELOC_COUNT of
1368 elf_slurp_reloc_table_from_section (abfd, asect, rel_hdr, reloc_count,
1369 relents, symbols, dynamic)
1372 Elf_Internal_Shdr *rel_hdr;
1373 bfd_size_type reloc_count;
1378 struct elf_backend_data * const ebd = get_elf_backend_data (abfd);
1379 PTR allocated = NULL;
1380 bfd_byte *native_relocs;
1385 allocated = (PTR) bfd_malloc (rel_hdr->sh_size);
1386 if (allocated == NULL)
1389 if (bfd_seek (abfd, rel_hdr->sh_offset, SEEK_SET) != 0
1390 || (bfd_bread (allocated, rel_hdr->sh_size, abfd)
1391 != rel_hdr->sh_size))
1394 native_relocs = (bfd_byte *) allocated;
1396 entsize = rel_hdr->sh_entsize;
1397 BFD_ASSERT (entsize == sizeof (Elf_External_Rel)
1398 || entsize == sizeof (Elf_External_Rela));
1400 for (i = 0, relent = relents;
1402 i++, relent++, native_relocs += entsize)
1404 Elf_Internal_Rela rela;
1405 Elf_Internal_Rel rel;
1407 if (entsize == sizeof (Elf_External_Rela))
1408 elf_swap_reloca_in (abfd, (Elf_External_Rela *) native_relocs, &rela);
1411 elf_swap_reloc_in (abfd, (Elf_External_Rel *) native_relocs, &rel);
1412 rela.r_offset = rel.r_offset;
1413 rela.r_info = rel.r_info;
1417 /* The address of an ELF reloc is section relative for an object
1418 file, and absolute for an executable file or shared library.
1419 The address of a normal BFD reloc is always section relative,
1420 and the address of a dynamic reloc is absolute.. */
1421 if ((abfd->flags & (EXEC_P | DYNAMIC)) == 0 || dynamic)
1422 relent->address = rela.r_offset;
1424 relent->address = rela.r_offset - asect->vma;
1426 if (ELF_R_SYM (rela.r_info) == 0)
1427 relent->sym_ptr_ptr = bfd_abs_section_ptr->symbol_ptr_ptr;
1432 ps = symbols + ELF_R_SYM (rela.r_info) - 1;
1435 /* Canonicalize ELF section symbols. FIXME: Why? */
1436 if ((s->flags & BSF_SECTION_SYM) == 0)
1437 relent->sym_ptr_ptr = ps;
1439 relent->sym_ptr_ptr = s->section->symbol_ptr_ptr;
1442 relent->addend = rela.r_addend;
1444 if (entsize == sizeof (Elf_External_Rela))
1445 (*ebd->elf_info_to_howto) (abfd, relent, &rela);
1447 (*ebd->elf_info_to_howto_rel) (abfd, relent, &rel);
1450 if (allocated != NULL)
1456 if (allocated != NULL)
1461 /* Read in and swap the external relocs. */
1464 elf_slurp_reloc_table (abfd, asect, symbols, dynamic)
1470 struct bfd_elf_section_data * const d = elf_section_data (asect);
1471 Elf_Internal_Shdr *rel_hdr;
1472 Elf_Internal_Shdr *rel_hdr2;
1473 bfd_size_type reloc_count;
1474 bfd_size_type reloc_count2;
1478 if (asect->relocation != NULL)
1483 if ((asect->flags & SEC_RELOC) == 0
1484 || asect->reloc_count == 0)
1487 rel_hdr = &d->rel_hdr;
1488 reloc_count = NUM_SHDR_ENTRIES (rel_hdr);
1489 rel_hdr2 = d->rel_hdr2;
1490 reloc_count2 = (rel_hdr2 ? NUM_SHDR_ENTRIES (rel_hdr2) : 0);
1492 BFD_ASSERT (asect->reloc_count == reloc_count + reloc_count2);
1493 BFD_ASSERT (asect->rel_filepos == rel_hdr->sh_offset
1494 || (rel_hdr2 && asect->rel_filepos == rel_hdr2->sh_offset));
1499 /* Note that ASECT->RELOC_COUNT tends not to be accurate in this
1500 case because relocations against this section may use the
1501 dynamic symbol table, and in that case bfd_section_from_shdr
1502 in elf.c does not update the RELOC_COUNT. */
1503 if (asect->_raw_size == 0)
1506 rel_hdr = &d->this_hdr;
1507 reloc_count = NUM_SHDR_ENTRIES (rel_hdr);
1512 amt = (reloc_count + reloc_count2) * sizeof (arelent);
1513 relents = (arelent *) bfd_alloc (abfd, amt);
1514 if (relents == NULL)
1517 if (!elf_slurp_reloc_table_from_section (abfd, asect,
1518 rel_hdr, reloc_count,
1524 && !elf_slurp_reloc_table_from_section (abfd, asect,
1525 rel_hdr2, reloc_count2,
1526 relents + reloc_count,
1530 asect->relocation = relents;
1536 elf_debug_section (num, hdr)
1538 Elf_Internal_Shdr *hdr;
1540 fprintf (stderr, "\nSection#%d '%s' 0x%.8lx\n", num,
1541 hdr->bfd_section != NULL ? hdr->bfd_section->name : "",
1544 "sh_name = %ld\tsh_type = %ld\tsh_flags = %ld\n",
1545 (long) hdr->sh_name,
1546 (long) hdr->sh_type,
1547 (long) hdr->sh_flags);
1549 "sh_addr = %ld\tsh_offset = %ld\tsh_size = %ld\n",
1550 (long) hdr->sh_addr,
1551 (long) hdr->sh_offset,
1552 (long) hdr->sh_size);
1554 "sh_link = %ld\tsh_info = %ld\tsh_addralign = %ld\n",
1555 (long) hdr->sh_link,
1556 (long) hdr->sh_info,
1557 (long) hdr->sh_addralign);
1558 fprintf (stderr, "sh_entsize = %ld\n",
1559 (long) hdr->sh_entsize);
1564 elf_debug_file (ehdrp)
1565 Elf_Internal_Ehdr *ehdrp;
1567 fprintf (stderr, "e_entry = 0x%.8lx\n", (long) ehdrp->e_entry);
1568 fprintf (stderr, "e_phoff = %ld\n", (long) ehdrp->e_phoff);
1569 fprintf (stderr, "e_phnum = %ld\n", (long) ehdrp->e_phnum);
1570 fprintf (stderr, "e_phentsize = %ld\n", (long) ehdrp->e_phentsize);
1571 fprintf (stderr, "e_shoff = %ld\n", (long) ehdrp->e_shoff);
1572 fprintf (stderr, "e_shnum = %ld\n", (long) ehdrp->e_shnum);
1573 fprintf (stderr, "e_shentsize = %ld\n", (long) ehdrp->e_shentsize);
1577 elf_symbol_flags (flags)
1580 static char buffer[1024];
1583 if (flags & BSF_LOCAL)
1584 strcat (buffer, " local");
1586 if (flags & BSF_GLOBAL)
1587 strcat (buffer, " global");
1589 if (flags & BSF_DEBUGGING)
1590 strcat (buffer, " debug");
1592 if (flags & BSF_FUNCTION)
1593 strcat (buffer, " function");
1595 if (flags & BSF_KEEP)
1596 strcat (buffer, " keep");
1598 if (flags & BSF_KEEP_G)
1599 strcat (buffer, " keep_g");
1601 if (flags & BSF_WEAK)
1602 strcat (buffer, " weak");
1604 if (flags & BSF_SECTION_SYM)
1605 strcat (buffer, " section-sym");
1607 if (flags & BSF_OLD_COMMON)
1608 strcat (buffer, " old-common");
1610 if (flags & BSF_NOT_AT_END)
1611 strcat (buffer, " not-at-end");
1613 if (flags & BSF_CONSTRUCTOR)
1614 strcat (buffer, " constructor");
1616 if (flags & BSF_WARNING)
1617 strcat (buffer, " warning");
1619 if (flags & BSF_INDIRECT)
1620 strcat (buffer, " indirect");
1622 if (flags & BSF_FILE)
1623 strcat (buffer, " file");
1625 if (flags & DYNAMIC)
1626 strcat (buffer, " dynamic");
1628 if (flags & ~(BSF_LOCAL
1643 strcat (buffer, " unknown-bits");
1649 #include "elfcore.h"
1650 #include "elflink.h"
1652 /* Size-dependent data and functions. */
1653 const struct elf_size_info NAME(_bfd_elf,size_info) = {
1654 sizeof (Elf_External_Ehdr),
1655 sizeof (Elf_External_Phdr),
1656 sizeof (Elf_External_Shdr),
1657 sizeof (Elf_External_Rel),
1658 sizeof (Elf_External_Rela),
1659 sizeof (Elf_External_Sym),
1660 sizeof (Elf_External_Dyn),
1661 sizeof (Elf_External_Note),
1664 ARCH_SIZE, FILE_ALIGN,
1665 ELFCLASS, EV_CURRENT,
1666 elf_write_out_phdrs,
1667 elf_write_shdrs_and_ehdr,
1669 elf_swap_symbol_out,
1670 elf_slurp_reloc_table,
1671 elf_slurp_symbol_table,