| 1 | /* ELF executable support for BFD. |
| 2 | Copyright 1991, 1992, 1993 Free Software Foundation, Inc. |
| 3 | |
| 4 | Written by Fred Fish @ Cygnus Support, from information published |
| 5 | in "UNIX System V Release 4, Programmers Guide: ANSI C and |
| 6 | Programming Support Tools". Sufficient support for gdb. |
| 7 | |
| 8 | Rewritten by Mark Eichin @ Cygnus Support, from information |
| 9 | published in "System V Application Binary Interface", chapters 4 |
| 10 | and 5, as well as the various "Processor Supplement" documents |
| 11 | derived from it. Added support for assembler and other object file |
| 12 | utilities. Further work done by Ken Raeburn (Cygnus Support), Michael |
| 13 | Meissner (Open Software Foundation), and Peter Hoogenboom (University |
| 14 | of Utah) to finish and extend this. |
| 15 | |
| 16 | This file is part of BFD, the Binary File Descriptor library. |
| 17 | |
| 18 | This program is free software; you can redistribute it and/or modify |
| 19 | it under the terms of the GNU General Public License as published by |
| 20 | the Free Software Foundation; either version 2 of the License, or |
| 21 | (at your option) any later version. |
| 22 | |
| 23 | This program is distributed in the hope that it will be useful, |
| 24 | but WITHOUT ANY WARRANTY; without even the implied warranty of |
| 25 | MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the |
| 26 | GNU General Public License for more details. |
| 27 | |
| 28 | You should have received a copy of the GNU General Public License |
| 29 | along with this program; if not, write to the Free Software |
| 30 | Foundation, Inc., 675 Mass Ave, Cambridge, MA 02139, USA. */ |
| 31 | |
| 32 | /* Problems and other issues to resolve. |
| 33 | |
| 34 | (1) BFD expects there to be some fixed number of "sections" in |
| 35 | the object file. I.E. there is a "section_count" variable in the |
| 36 | bfd structure which contains the number of sections. However, ELF |
| 37 | supports multiple "views" of a file. In particular, with current |
| 38 | implementations, executable files typically have two tables, a |
| 39 | program header table and a section header table, both of which |
| 40 | partition the executable. |
| 41 | |
| 42 | In ELF-speak, the "linking view" of the file uses the section header |
| 43 | table to access "sections" within the file, and the "execution view" |
| 44 | uses the program header table to access "segments" within the file. |
| 45 | "Segments" typically may contain all the data from one or more |
| 46 | "sections". |
| 47 | |
| 48 | Note that the section header table is optional in ELF executables, |
| 49 | but it is this information that is most useful to gdb. If the |
| 50 | section header table is missing, then gdb should probably try |
| 51 | to make do with the program header table. (FIXME) |
| 52 | |
| 53 | (2) The code in this file is compiled twice, once in 32-bit mode and |
| 54 | once in 64-bit mode. More of it should be made size-independent |
| 55 | and moved into elf.c. |
| 56 | |
| 57 | (3) ELF section symbols are handled rather sloppily now. This should |
| 58 | be cleaned up, and ELF section symbols reconciled with BFD section |
| 59 | symbols. |
| 60 | */ |
| 61 | |
| 62 | #include <assert.h> |
| 63 | #include <string.h> /* For strrchr and friends */ |
| 64 | #include "bfd.h" |
| 65 | #include "sysdep.h" |
| 66 | #include "libbfd.h" |
| 67 | #include "libelf.h" |
| 68 | |
| 69 | #ifndef alloca |
| 70 | PTR alloca (); |
| 71 | #endif |
| 72 | |
| 73 | /* Renaming structures, typedefs, macros and functions to be size-specific. */ |
| 74 | #define Elf_External_Ehdr NAME(Elf,External_Ehdr) |
| 75 | #define Elf_External_Sym NAME(Elf,External_Sym) |
| 76 | #define Elf_External_Shdr NAME(Elf,External_Shdr) |
| 77 | #define Elf_External_Phdr NAME(Elf,External_Phdr) |
| 78 | #define Elf_External_Rel NAME(Elf,External_Rel) |
| 79 | #define Elf_External_Rela NAME(Elf,External_Rela) |
| 80 | |
| 81 | #define elf_core_file_failing_command NAME(bfd_elf,core_file_failing_command) |
| 82 | #define elf_core_file_failing_signal NAME(bfd_elf,core_file_failing_signal) |
| 83 | #define elf_core_file_matches_executable_p NAME(bfd_elf,core_file_matches_executable_p) |
| 84 | #define elf_object_p NAME(bfd_elf,object_p) |
| 85 | #define elf_core_file_p NAME(bfd_elf,core_file_p) |
| 86 | #define elf_get_symtab_upper_bound NAME(bfd_elf,get_symtab_upper_bound) |
| 87 | #define elf_get_reloc_upper_bound NAME(bfd_elf,get_reloc_upper_bound) |
| 88 | #define elf_canonicalize_reloc NAME(bfd_elf,canonicalize_reloc) |
| 89 | #define elf_get_symtab NAME(bfd_elf,get_symtab) |
| 90 | #define elf_make_empty_symbol NAME(bfd_elf,make_empty_symbol) |
| 91 | #define elf_get_symbol_info NAME(bfd_elf,get_symbol_info) |
| 92 | #define elf_print_symbol NAME(bfd_elf,print_symbol) |
| 93 | #define elf_get_lineno NAME(bfd_elf,get_lineno) |
| 94 | #define elf_set_arch_mach NAME(bfd_elf,set_arch_mach) |
| 95 | #define elf_find_nearest_line NAME(bfd_elf,find_nearest_line) |
| 96 | #define elf_sizeof_headers NAME(bfd_elf,sizeof_headers) |
| 97 | #define elf_set_section_contents NAME(bfd_elf,set_section_contents) |
| 98 | #define elf_no_info_to_howto NAME(bfd_elf,no_info_to_howto) |
| 99 | #define elf_no_info_to_howto_rel NAME(bfd_elf,no_info_to_howto_rel) |
| 100 | #define elf_new_section_hook NAME(bfd_elf,new_section_hook) |
| 101 | #define write_relocs NAME(bfd_elf,_write_relocs) |
| 102 | |
| 103 | #if ARCH_SIZE == 64 |
| 104 | #define ELF_R_INFO(X,Y) ELF64_R_INFO(X,Y) |
| 105 | #define ELF_R_SYM(X) ELF64_R_SYM(X) |
| 106 | #define ELFCLASS ELFCLASS64 |
| 107 | #endif |
| 108 | #if ARCH_SIZE == 32 |
| 109 | #define ELF_R_INFO(X,Y) ELF32_R_INFO(X,Y) |
| 110 | #define ELF_R_SYM(X) ELF32_R_SYM(X) |
| 111 | #define ELFCLASS ELFCLASS32 |
| 112 | #endif |
| 113 | |
| 114 | static int shstrtab_length_fixed; |
| 115 | |
| 116 | struct elf_sect_data { |
| 117 | int reloc_sec; |
| 118 | /* more? */ |
| 119 | }; |
| 120 | |
| 121 | /* Forward declarations of static functions */ |
| 122 | |
| 123 | static struct sec * section_from_elf_index PARAMS ((bfd *, int)); |
| 124 | |
| 125 | static int elf_section_from_bfd_section PARAMS ((bfd *, struct sec *)); |
| 126 | |
| 127 | static boolean elf_slurp_symbol_table PARAMS ((bfd *, asymbol **)); |
| 128 | |
| 129 | static int elf_symbol_from_bfd_symbol PARAMS ((bfd *, |
| 130 | struct symbol_cache_entry **)); |
| 131 | |
| 132 | static void elf_map_symbols PARAMS ((bfd *)); |
| 133 | static void swap_out_syms PARAMS ((bfd *)); |
| 134 | |
| 135 | #ifdef DEBUG |
| 136 | static void elf_debug_section PARAMS ((char *, int, Elf_Internal_Shdr *)); |
| 137 | static void elf_debug_file PARAMS ((Elf_Internal_Ehdr *)); |
| 138 | #endif |
| 139 | |
| 140 | #define elf_string_from_elf_strtab(abfd,strindex) \ |
| 141 | elf_string_from_elf_section(abfd,elf_elfheader(abfd)->e_shstrndx,strindex) |
| 142 | |
| 143 | \f |
| 144 | /* Structure swapping routines */ |
| 145 | |
| 146 | /* Should perhaps use put_offset, put_word, etc. For now, the two versions |
| 147 | can be handled by explicitly specifying 32 bits or "the long type". */ |
| 148 | #if ARCH_SIZE == 64 |
| 149 | #define put_word bfd_h_put_64 |
| 150 | #define get_word bfd_h_get_64 |
| 151 | #endif |
| 152 | #if ARCH_SIZE == 32 |
| 153 | #define put_word bfd_h_put_32 |
| 154 | #define get_word bfd_h_get_32 |
| 155 | #endif |
| 156 | |
| 157 | /* Translate an ELF symbol in external format into an ELF symbol in internal |
| 158 | format. */ |
| 159 | |
| 160 | static void |
| 161 | DEFUN (elf_swap_symbol_in, (abfd, src, dst), |
| 162 | bfd * abfd AND |
| 163 | Elf_External_Sym * src AND |
| 164 | Elf_Internal_Sym * dst) |
| 165 | { |
| 166 | dst->st_name = bfd_h_get_32 (abfd, (bfd_byte *) src->st_name); |
| 167 | dst->st_value = get_word (abfd, (bfd_byte *) src->st_value); |
| 168 | dst->st_size = get_word (abfd, (bfd_byte *) src->st_size); |
| 169 | dst->st_info = bfd_h_get_8 (abfd, (bfd_byte *) src->st_info); |
| 170 | dst->st_other = bfd_h_get_8 (abfd, (bfd_byte *) src->st_other); |
| 171 | dst->st_shndx = bfd_h_get_16 (abfd, (bfd_byte *) src->st_shndx); |
| 172 | } |
| 173 | |
| 174 | /* Translate an ELF symbol in internal format into an ELF symbol in external |
| 175 | format. */ |
| 176 | |
| 177 | static void |
| 178 | DEFUN (elf_swap_symbol_out, (abfd, src, dst), |
| 179 | bfd * abfd AND |
| 180 | Elf_Internal_Sym * src AND |
| 181 | Elf_External_Sym * dst) |
| 182 | { |
| 183 | bfd_h_put_32 (abfd, src->st_name, dst->st_name); |
| 184 | put_word (abfd, src->st_value, dst->st_value); |
| 185 | put_word (abfd, src->st_size, dst->st_size); |
| 186 | bfd_h_put_8 (abfd, src->st_info, dst->st_info); |
| 187 | bfd_h_put_8 (abfd, src->st_other, dst->st_other); |
| 188 | bfd_h_put_16 (abfd, src->st_shndx, dst->st_shndx); |
| 189 | } |
| 190 | |
| 191 | |
| 192 | /* Translate an ELF file header in external format into an ELF file header in |
| 193 | internal format. */ |
| 194 | |
| 195 | static void |
| 196 | DEFUN (elf_swap_ehdr_in, (abfd, src, dst), |
| 197 | bfd * abfd AND |
| 198 | Elf_External_Ehdr * src AND |
| 199 | Elf_Internal_Ehdr * dst) |
| 200 | { |
| 201 | memcpy (dst->e_ident, src->e_ident, EI_NIDENT); |
| 202 | dst->e_type = bfd_h_get_16 (abfd, (bfd_byte *) src->e_type); |
| 203 | dst->e_machine = bfd_h_get_16 (abfd, (bfd_byte *) src->e_machine); |
| 204 | dst->e_version = bfd_h_get_32 (abfd, (bfd_byte *) src->e_version); |
| 205 | dst->e_entry = get_word (abfd, (bfd_byte *) src->e_entry); |
| 206 | dst->e_phoff = get_word (abfd, (bfd_byte *) src->e_phoff); |
| 207 | dst->e_shoff = get_word (abfd, (bfd_byte *) src->e_shoff); |
| 208 | dst->e_flags = bfd_h_get_32 (abfd, (bfd_byte *) src->e_flags); |
| 209 | dst->e_ehsize = bfd_h_get_16 (abfd, (bfd_byte *) src->e_ehsize); |
| 210 | dst->e_phentsize = bfd_h_get_16 (abfd, (bfd_byte *) src->e_phentsize); |
| 211 | dst->e_phnum = bfd_h_get_16 (abfd, (bfd_byte *) src->e_phnum); |
| 212 | dst->e_shentsize = bfd_h_get_16 (abfd, (bfd_byte *) src->e_shentsize); |
| 213 | dst->e_shnum = bfd_h_get_16 (abfd, (bfd_byte *) src->e_shnum); |
| 214 | dst->e_shstrndx = bfd_h_get_16 (abfd, (bfd_byte *) src->e_shstrndx); |
| 215 | } |
| 216 | |
| 217 | /* Translate an ELF file header in internal format into an ELF file header in |
| 218 | external format. */ |
| 219 | |
| 220 | static void |
| 221 | DEFUN (elf_swap_ehdr_out, (abfd, src, dst), |
| 222 | bfd * abfd AND |
| 223 | Elf_Internal_Ehdr * src AND |
| 224 | Elf_External_Ehdr * dst) |
| 225 | { |
| 226 | memcpy (dst->e_ident, src->e_ident, EI_NIDENT); |
| 227 | /* note that all elements of dst are *arrays of unsigned char* already... */ |
| 228 | bfd_h_put_16 (abfd, src->e_type, dst->e_type); |
| 229 | bfd_h_put_16 (abfd, src->e_machine, dst->e_machine); |
| 230 | bfd_h_put_32 (abfd, src->e_version, dst->e_version); |
| 231 | put_word (abfd, src->e_entry, dst->e_entry); |
| 232 | put_word (abfd, src->e_phoff, dst->e_phoff); |
| 233 | put_word (abfd, src->e_shoff, dst->e_shoff); |
| 234 | bfd_h_put_32 (abfd, src->e_flags, dst->e_flags); |
| 235 | bfd_h_put_16 (abfd, src->e_ehsize, dst->e_ehsize); |
| 236 | bfd_h_put_16 (abfd, src->e_phentsize, dst->e_phentsize); |
| 237 | bfd_h_put_16 (abfd, src->e_phnum, dst->e_phnum); |
| 238 | bfd_h_put_16 (abfd, src->e_shentsize, dst->e_shentsize); |
| 239 | bfd_h_put_16 (abfd, src->e_shnum, dst->e_shnum); |
| 240 | bfd_h_put_16 (abfd, src->e_shstrndx, dst->e_shstrndx); |
| 241 | } |
| 242 | |
| 243 | |
| 244 | /* Translate an ELF section header table entry in external format into an |
| 245 | ELF section header table entry in internal format. */ |
| 246 | |
| 247 | static void |
| 248 | DEFUN (elf_swap_shdr_in, (abfd, src, dst), |
| 249 | bfd * abfd AND |
| 250 | Elf_External_Shdr * src AND |
| 251 | Elf_Internal_Shdr * dst) |
| 252 | { |
| 253 | dst->sh_name = bfd_h_get_32 (abfd, (bfd_byte *) src->sh_name); |
| 254 | dst->sh_type = bfd_h_get_32 (abfd, (bfd_byte *) src->sh_type); |
| 255 | dst->sh_flags = get_word (abfd, (bfd_byte *) src->sh_flags); |
| 256 | dst->sh_addr = get_word (abfd, (bfd_byte *) src->sh_addr); |
| 257 | dst->sh_offset = get_word (abfd, (bfd_byte *) src->sh_offset); |
| 258 | dst->sh_size = get_word (abfd, (bfd_byte *) src->sh_size); |
| 259 | dst->sh_link = bfd_h_get_32 (abfd, (bfd_byte *) src->sh_link); |
| 260 | dst->sh_info = bfd_h_get_32 (abfd, (bfd_byte *) src->sh_info); |
| 261 | dst->sh_addralign = get_word (abfd, (bfd_byte *) src->sh_addralign); |
| 262 | dst->sh_entsize = get_word (abfd, (bfd_byte *) src->sh_entsize); |
| 263 | /* we haven't done any processing on it yet, so... */ |
| 264 | dst->rawdata = (void *) 0; |
| 265 | } |
| 266 | |
| 267 | /* Translate an ELF section header table entry in internal format into an |
| 268 | ELF section header table entry in external format. */ |
| 269 | |
| 270 | static void |
| 271 | DEFUN (elf_swap_shdr_out, (abfd, src, dst), |
| 272 | bfd * abfd AND |
| 273 | Elf_Internal_Shdr * src AND |
| 274 | Elf_External_Shdr * dst) |
| 275 | { |
| 276 | /* note that all elements of dst are *arrays of unsigned char* already... */ |
| 277 | bfd_h_put_32 (abfd, src->sh_name, dst->sh_name); |
| 278 | bfd_h_put_32 (abfd, src->sh_type, dst->sh_type); |
| 279 | put_word (abfd, src->sh_flags, dst->sh_flags); |
| 280 | put_word (abfd, src->sh_addr, dst->sh_addr); |
| 281 | put_word (abfd, src->sh_offset, dst->sh_offset); |
| 282 | put_word (abfd, src->sh_size, dst->sh_size); |
| 283 | bfd_h_put_32 (abfd, src->sh_link, dst->sh_link); |
| 284 | bfd_h_put_32 (abfd, src->sh_info, dst->sh_info); |
| 285 | put_word (abfd, src->sh_addralign, dst->sh_addralign); |
| 286 | put_word (abfd, src->sh_entsize, dst->sh_entsize); |
| 287 | } |
| 288 | |
| 289 | |
| 290 | /* Translate an ELF program header table entry in external format into an |
| 291 | ELF program header table entry in internal format. */ |
| 292 | |
| 293 | static void |
| 294 | DEFUN (elf_swap_phdr_in, (abfd, src, dst), |
| 295 | bfd * abfd AND |
| 296 | Elf_External_Phdr * src AND |
| 297 | Elf_Internal_Phdr * dst) |
| 298 | { |
| 299 | dst->p_type = bfd_h_get_32 (abfd, (bfd_byte *) src->p_type); |
| 300 | dst->p_flags = bfd_h_get_32 (abfd, (bfd_byte *) src->p_flags); |
| 301 | dst->p_offset = get_word (abfd, (bfd_byte *) src->p_offset); |
| 302 | dst->p_vaddr = get_word (abfd, (bfd_byte *) src->p_vaddr); |
| 303 | dst->p_paddr = get_word (abfd, (bfd_byte *) src->p_paddr); |
| 304 | dst->p_filesz = get_word (abfd, (bfd_byte *) src->p_filesz); |
| 305 | dst->p_memsz = get_word (abfd, (bfd_byte *) src->p_memsz); |
| 306 | dst->p_align = get_word (abfd, (bfd_byte *) src->p_align); |
| 307 | } |
| 308 | |
| 309 | static void |
| 310 | DEFUN (elf_swap_phdr_out, (abfd, src, dst), |
| 311 | bfd * abfd AND |
| 312 | Elf_Internal_Phdr * src AND |
| 313 | Elf_External_Phdr * dst) |
| 314 | { |
| 315 | /* note that all elements of dst are *arrays of unsigned char* already... */ |
| 316 | bfd_h_put_32 (abfd, src->p_type, dst->p_type); |
| 317 | put_word (abfd, src->p_offset, dst->p_offset); |
| 318 | put_word (abfd, src->p_vaddr, dst->p_vaddr); |
| 319 | put_word (abfd, src->p_paddr, dst->p_paddr); |
| 320 | put_word (abfd, src->p_filesz, dst->p_filesz); |
| 321 | put_word (abfd, src->p_memsz, dst->p_memsz); |
| 322 | bfd_h_put_32 (abfd, src->p_flags, dst->p_flags); |
| 323 | put_word (abfd, src->p_align, dst->p_align); |
| 324 | } |
| 325 | |
| 326 | /* Translate an ELF reloc from external format to internal format. */ |
| 327 | static INLINE void |
| 328 | DEFUN (elf_swap_reloc_in, (abfd, src, dst), |
| 329 | bfd * abfd AND |
| 330 | Elf_External_Rel * src AND |
| 331 | Elf_Internal_Rel * dst) |
| 332 | { |
| 333 | dst->r_offset = get_word (abfd, (bfd_byte *) src->r_offset); |
| 334 | dst->r_info = get_word (abfd, (bfd_byte *) src->r_info); |
| 335 | } |
| 336 | |
| 337 | static INLINE void |
| 338 | DEFUN (elf_swap_reloca_in, (abfd, src, dst), |
| 339 | bfd * abfd AND |
| 340 | Elf_External_Rela * src AND |
| 341 | Elf_Internal_Rela * dst) |
| 342 | { |
| 343 | dst->r_offset = get_word (abfd, (bfd_byte *) src->r_offset); |
| 344 | dst->r_info = get_word (abfd, (bfd_byte *) src->r_info); |
| 345 | dst->r_addend = get_word (abfd, (bfd_byte *) src->r_addend); |
| 346 | } |
| 347 | |
| 348 | /* Translate an ELF reloc from internal format to external format. */ |
| 349 | static INLINE void |
| 350 | DEFUN (elf_swap_reloc_out, (abfd, src, dst), |
| 351 | bfd * abfd AND |
| 352 | Elf_Internal_Rel * src AND |
| 353 | Elf_External_Rel * dst) |
| 354 | { |
| 355 | put_word (abfd, src->r_offset, dst->r_offset); |
| 356 | put_word (abfd, src->r_info, dst->r_info); |
| 357 | } |
| 358 | |
| 359 | static INLINE void |
| 360 | DEFUN (elf_swap_reloca_out, (abfd, src, dst), |
| 361 | bfd * abfd AND |
| 362 | Elf_Internal_Rela * src AND |
| 363 | Elf_External_Rela * dst) |
| 364 | { |
| 365 | put_word (abfd, src->r_offset, dst->r_offset); |
| 366 | put_word (abfd, src->r_info, dst->r_info); |
| 367 | put_word (abfd, src->r_addend, dst->r_addend); |
| 368 | } |
| 369 | |
| 370 | \f |
| 371 | |
| 372 | /* String table creation/manipulation routines */ |
| 373 | |
| 374 | static struct strtab * |
| 375 | DEFUN (bfd_new_strtab, (abfd), |
| 376 | bfd * abfd) |
| 377 | { |
| 378 | struct strtab *ss; |
| 379 | |
| 380 | ss = (struct strtab *) bfd_xmalloc (sizeof (struct strtab)); |
| 381 | ss->tab = bfd_xmalloc (1); |
| 382 | BFD_ASSERT (ss->tab != 0); |
| 383 | *ss->tab = 0; |
| 384 | ss->nentries = 0; |
| 385 | ss->length = 1; |
| 386 | |
| 387 | return ss; |
| 388 | } |
| 389 | |
| 390 | static int |
| 391 | DEFUN (bfd_add_to_strtab, (abfd, ss, str), |
| 392 | bfd * abfd AND |
| 393 | struct strtab *ss AND |
| 394 | CONST char *str) |
| 395 | { |
| 396 | /* should search first, but for now: */ |
| 397 | /* include the trailing NUL */ |
| 398 | int ln = strlen (str) + 1; |
| 399 | |
| 400 | /* should this be using obstacks? */ |
| 401 | ss->tab = realloc (ss->tab, ss->length + ln); |
| 402 | |
| 403 | BFD_ASSERT (ss->tab != 0); |
| 404 | strcpy (ss->tab + ss->length, str); |
| 405 | ss->nentries++; |
| 406 | ss->length += ln; |
| 407 | |
| 408 | return ss->length - ln; |
| 409 | } |
| 410 | |
| 411 | static int |
| 412 | DEFUN (bfd_add_2_to_strtab, (abfd, ss, str, str2), |
| 413 | bfd * abfd AND |
| 414 | struct strtab *ss AND |
| 415 | char *str AND |
| 416 | CONST char *str2) |
| 417 | { |
| 418 | /* should search first, but for now: */ |
| 419 | /* include the trailing NUL */ |
| 420 | int ln = strlen (str) + strlen (str2) + 1; |
| 421 | |
| 422 | /* should this be using obstacks? */ |
| 423 | if (ss->length) |
| 424 | ss->tab = realloc (ss->tab, ss->length + ln); |
| 425 | else |
| 426 | ss->tab = bfd_xmalloc (ln); |
| 427 | |
| 428 | BFD_ASSERT (ss->tab != 0); |
| 429 | strcpy (ss->tab + ss->length, str); |
| 430 | strcpy (ss->tab + ss->length + strlen (str), str2); |
| 431 | ss->nentries++; |
| 432 | ss->length += ln; |
| 433 | |
| 434 | return ss->length - ln; |
| 435 | } |
| 436 | |
| 437 | \f |
| 438 | /* ELF .o/exec file reading */ |
| 439 | |
| 440 | /* Create a new bfd section from an ELF section header. */ |
| 441 | |
| 442 | static boolean |
| 443 | DEFUN (bfd_section_from_shdr, (abfd, shindex), |
| 444 | bfd * abfd AND |
| 445 | unsigned int shindex) |
| 446 | { |
| 447 | Elf_Internal_Shdr *hdr = elf_elfsections (abfd)[shindex]; |
| 448 | Elf_Internal_Ehdr *ehdr = elf_elfheader (abfd); |
| 449 | asection *newsect; |
| 450 | char *name; |
| 451 | |
| 452 | name = elf_string_from_elf_strtab (abfd, hdr->sh_name); |
| 453 | |
| 454 | switch (hdr->sh_type) |
| 455 | { |
| 456 | |
| 457 | case SHT_NULL: |
| 458 | /* inactive section. Throw it away. */ |
| 459 | return true; |
| 460 | |
| 461 | case SHT_PROGBITS: |
| 462 | /* Bits that get saved. This one is real. */ |
| 463 | if (!hdr->rawdata) |
| 464 | { |
| 465 | newsect = bfd_make_section (abfd, name); |
| 466 | if (newsect != NULL) |
| 467 | { |
| 468 | newsect->filepos = hdr->sh_offset; /* so we can read back the bits */ |
| 469 | newsect->flags |= SEC_HAS_CONTENTS; |
| 470 | newsect->vma = hdr->sh_addr; |
| 471 | newsect->_raw_size = hdr->sh_size; |
| 472 | newsect->alignment_power = bfd_log2 (hdr->sh_addralign); |
| 473 | |
| 474 | if (hdr->sh_flags & SHF_ALLOC) |
| 475 | { |
| 476 | newsect->flags |= SEC_ALLOC; |
| 477 | newsect->flags |= SEC_LOAD; |
| 478 | } |
| 479 | |
| 480 | if (!(hdr->sh_flags & SHF_WRITE)) |
| 481 | newsect->flags |= SEC_READONLY; |
| 482 | |
| 483 | if (hdr->sh_flags & SHF_EXECINSTR) |
| 484 | newsect->flags |= SEC_CODE; /* FIXME: may only contain SOME code */ |
| 485 | else |
| 486 | newsect->flags |= SEC_DATA; |
| 487 | |
| 488 | hdr->rawdata = (void *) newsect; |
| 489 | } |
| 490 | else |
| 491 | hdr->rawdata = (void *) bfd_get_section_by_name (abfd, name); |
| 492 | } |
| 493 | return true; |
| 494 | |
| 495 | case SHT_NOBITS: |
| 496 | /* Bits that get saved. This one is real. */ |
| 497 | if (!hdr->rawdata) |
| 498 | { |
| 499 | newsect = bfd_make_section (abfd, name); |
| 500 | if (newsect != NULL) |
| 501 | { |
| 502 | newsect->vma = hdr->sh_addr; |
| 503 | newsect->_raw_size = hdr->sh_size; |
| 504 | newsect->filepos = hdr->sh_offset; /* fake */ |
| 505 | newsect->alignment_power = bfd_log2 (hdr->sh_addralign); |
| 506 | if (hdr->sh_flags & SHF_ALLOC) |
| 507 | newsect->flags |= SEC_ALLOC; |
| 508 | |
| 509 | if (!(hdr->sh_flags & SHF_WRITE)) |
| 510 | newsect->flags |= SEC_READONLY; |
| 511 | |
| 512 | if (hdr->sh_flags & SHF_EXECINSTR) |
| 513 | newsect->flags |= SEC_CODE; /* FIXME: may only contain SOME code */ |
| 514 | else |
| 515 | newsect->flags |= SEC_DATA; |
| 516 | |
| 517 | hdr->rawdata = (void *) newsect; |
| 518 | } |
| 519 | } |
| 520 | return true; |
| 521 | |
| 522 | case SHT_SYMTAB: /* A symbol table */ |
| 523 | if (elf_onesymtab (abfd) == shindex) |
| 524 | return true; |
| 525 | |
| 526 | BFD_ASSERT (hdr->sh_entsize == sizeof (Elf_External_Sym)); |
| 527 | BFD_ASSERT (elf_onesymtab (abfd) == 0); |
| 528 | elf_onesymtab (abfd) = shindex; |
| 529 | elf_tdata(abfd)->symtab_hdr = *hdr; |
| 530 | elf_elfsections(abfd)[shindex] = &elf_tdata(abfd)->symtab_hdr; |
| 531 | abfd->flags |= HAS_SYMS; |
| 532 | return true; |
| 533 | |
| 534 | case SHT_STRTAB: /* A string table */ |
| 535 | if (hdr->rawdata) |
| 536 | return true; |
| 537 | if (ehdr->e_shstrndx == shindex) |
| 538 | { |
| 539 | elf_tdata(abfd)->shstrtab_hdr = *hdr; |
| 540 | elf_elfsections(abfd)[shindex] = &elf_tdata(abfd)->shstrtab_hdr; |
| 541 | hdr->rawdata = (PTR) &elf_tdata(abfd)->shstrtab_hdr; |
| 542 | return true; |
| 543 | } |
| 544 | { |
| 545 | int i; |
| 546 | |
| 547 | for (i = 1; i < ehdr->e_shnum; i++) |
| 548 | { |
| 549 | Elf_Internal_Shdr *hdr2 = elf_elfsections(abfd)[i]; |
| 550 | if (hdr2->sh_link == shindex) |
| 551 | { |
| 552 | bfd_section_from_shdr (abfd, i); |
| 553 | if (elf_onesymtab (abfd) == i) |
| 554 | { |
| 555 | elf_tdata(abfd)->strtab_hdr = *hdr; |
| 556 | elf_elfsections(abfd)[shindex] = &elf_tdata(abfd)->strtab_hdr; |
| 557 | return true; |
| 558 | } |
| 559 | #if 0 /* Not handling other string tables specially right now. */ |
| 560 | hdr2 = elf_elfsections(abfd)[i]; /* in case it moved */ |
| 561 | /* We have a strtab for some random other section. */ |
| 562 | newsect = (asection *) hdr2->rawdata; |
| 563 | if (!newsect) |
| 564 | break; |
| 565 | hdr->rawdata = (PTR) newsect; |
| 566 | hdr2 = &elf_section_data (newsect)->str_hdr; |
| 567 | *hdr2 = *hdr; |
| 568 | elf_elfsections(abfd)[shindex] = hdr2; |
| 569 | #endif |
| 570 | } |
| 571 | } |
| 572 | } |
| 573 | |
| 574 | newsect = bfd_make_section (abfd, name); |
| 575 | if (newsect) |
| 576 | { |
| 577 | newsect->flags = SEC_HAS_CONTENTS; |
| 578 | hdr->rawdata = (PTR) newsect; |
| 579 | newsect->_raw_size = hdr->sh_size; |
| 580 | newsect->alignment_power = 0; |
| 581 | newsect->vma = 0; |
| 582 | |
| 583 | if (hdr->sh_flags & SHF_ALLOC) |
| 584 | newsect->flags |= SEC_ALLOC|SEC_LOAD; |
| 585 | if (!(hdr->sh_flags & SHF_WRITE)) |
| 586 | newsect->flags |= SEC_READONLY; |
| 587 | if (hdr->sh_flags & SHF_EXECINSTR) |
| 588 | newsect->flags |= SEC_CODE; |
| 589 | else |
| 590 | newsect->flags |= SEC_DATA; |
| 591 | } |
| 592 | |
| 593 | return true; |
| 594 | |
| 595 | case SHT_REL: |
| 596 | case SHT_RELA: |
| 597 | /* *These* do a lot of work -- but build no sections! |
| 598 | The spec says there can be multiple strtabs, but only one symtab, |
| 599 | but there can be lots of REL* sections. */ |
| 600 | /* FIXME: The above statement is wrong! There are typically at least |
| 601 | two symbol tables in a dynamically linked executable, ".dynsym" |
| 602 | which is the dynamic linkage symbol table and ".symtab", which is |
| 603 | the "traditional" symbol table. -fnf */ |
| 604 | |
| 605 | { |
| 606 | asection *target_sect; |
| 607 | Elf_Internal_Shdr *hdr2; |
| 608 | int use_rela_p = get_elf_backend_data (abfd)->use_rela_p; |
| 609 | |
| 610 | /* Don't allow REL relocations on a machine that uses RELA and |
| 611 | vice versa. */ |
| 612 | /* @@ Actually, the generic ABI does suggest that both might be |
| 613 | used in one file. But the four ABI Processor Supplements I |
| 614 | have access to right now all specify that only one is used on |
| 615 | each of those architectures. It's conceivable that, e.g., a |
| 616 | bunch of absolute 32-bit relocs might be more compact in REL |
| 617 | form even on a RELA machine... */ |
| 618 | BFD_ASSERT (!(use_rela_p && (hdr->sh_type == SHT_REL))); |
| 619 | BFD_ASSERT (!(!use_rela_p && (hdr->sh_type == SHT_RELA))); |
| 620 | BFD_ASSERT (hdr->sh_entsize == |
| 621 | (use_rela_p |
| 622 | ? sizeof (Elf_External_Rela) |
| 623 | : sizeof (Elf_External_Rel))); |
| 624 | |
| 625 | bfd_section_from_shdr (abfd, hdr->sh_info); /* target */ |
| 626 | bfd_section_from_shdr (abfd, hdr->sh_link); /* symbol table */ |
| 627 | target_sect = section_from_elf_index (abfd, hdr->sh_info); |
| 628 | if (target_sect == NULL) |
| 629 | return false; |
| 630 | |
| 631 | hdr2 = &elf_section_data (target_sect)->rel_hdr; |
| 632 | *hdr2 = *hdr; |
| 633 | elf_elfsections(abfd)[shindex] = hdr2; |
| 634 | target_sect->reloc_count = hdr->sh_size / hdr->sh_entsize; |
| 635 | target_sect->flags |= SEC_RELOC; |
| 636 | target_sect->relocation = 0; |
| 637 | target_sect->rel_filepos = hdr->sh_offset; |
| 638 | abfd->flags |= HAS_RELOC; |
| 639 | return true; |
| 640 | } |
| 641 | break; |
| 642 | |
| 643 | case SHT_HASH: |
| 644 | case SHT_DYNAMIC: |
| 645 | case SHT_DYNSYM: /* could treat this like symtab... */ |
| 646 | #if 0 |
| 647 | fprintf (stderr, "Dynamic Linking sections not yet supported.\n"); |
| 648 | BFD_FAIL (); |
| 649 | #endif |
| 650 | break; |
| 651 | |
| 652 | case SHT_NOTE: |
| 653 | #if 0 |
| 654 | fprintf (stderr, "Note Sections not yet supported.\n"); |
| 655 | BFD_FAIL (); |
| 656 | #endif |
| 657 | break; |
| 658 | |
| 659 | case SHT_SHLIB: |
| 660 | #if 0 |
| 661 | fprintf (stderr, "SHLIB Sections not supported (and non conforming.)\n"); |
| 662 | #endif |
| 663 | return true; |
| 664 | |
| 665 | default: |
| 666 | /* Check for any processor-specific section types. */ |
| 667 | { |
| 668 | struct elf_backend_data *bed = get_elf_backend_data (abfd); |
| 669 | |
| 670 | if (bed->elf_backend_section_from_shdr) |
| 671 | (*bed->elf_backend_section_from_shdr) (abfd, hdr, name); |
| 672 | } |
| 673 | break; |
| 674 | } |
| 675 | |
| 676 | return true; |
| 677 | } |
| 678 | |
| 679 | boolean |
| 680 | DEFUN (elf_new_section_hook, (abfd, sec), |
| 681 | bfd *abfd |
| 682 | AND asection *sec) |
| 683 | { |
| 684 | struct bfd_elf_section_data *sdata; |
| 685 | |
| 686 | sdata = (struct bfd_elf_section_data *) bfd_alloc (abfd, sizeof (*sdata)); |
| 687 | sec->used_by_bfd = (PTR) sdata; |
| 688 | memset (sdata, 0, sizeof (*sdata)); |
| 689 | return true; |
| 690 | } |
| 691 | |
| 692 | /* Create a new bfd section from an ELF program header. |
| 693 | |
| 694 | Since program segments have no names, we generate a synthetic name |
| 695 | of the form segment<NUM>, where NUM is generally the index in the |
| 696 | program header table. For segments that are split (see below) we |
| 697 | generate the names segment<NUM>a and segment<NUM>b. |
| 698 | |
| 699 | Note that some program segments may have a file size that is different than |
| 700 | (less than) the memory size. All this means is that at execution the |
| 701 | system must allocate the amount of memory specified by the memory size, |
| 702 | but only initialize it with the first "file size" bytes read from the |
| 703 | file. This would occur for example, with program segments consisting |
| 704 | of combined data+bss. |
| 705 | |
| 706 | To handle the above situation, this routine generates TWO bfd sections |
| 707 | for the single program segment. The first has the length specified by |
| 708 | the file size of the segment, and the second has the length specified |
| 709 | by the difference between the two sizes. In effect, the segment is split |
| 710 | into it's initialized and uninitialized parts. |
| 711 | |
| 712 | */ |
| 713 | |
| 714 | static boolean |
| 715 | DEFUN (bfd_section_from_phdr, (abfd, hdr, index), |
| 716 | bfd * abfd AND |
| 717 | Elf_Internal_Phdr * hdr AND |
| 718 | int index) |
| 719 | { |
| 720 | asection *newsect; |
| 721 | char *name; |
| 722 | char namebuf[64]; |
| 723 | int split; |
| 724 | |
| 725 | split = ((hdr->p_memsz > 0) && |
| 726 | (hdr->p_filesz > 0) && |
| 727 | (hdr->p_memsz > hdr->p_filesz)); |
| 728 | sprintf (namebuf, split ? "segment%da" : "segment%d", index); |
| 729 | name = bfd_alloc (abfd, strlen (namebuf) + 1); |
| 730 | strcpy (name, namebuf); |
| 731 | newsect = bfd_make_section (abfd, name); |
| 732 | newsect->vma = hdr->p_vaddr; |
| 733 | newsect->_raw_size = hdr->p_filesz; |
| 734 | newsect->filepos = hdr->p_offset; |
| 735 | newsect->flags |= SEC_HAS_CONTENTS; |
| 736 | if (hdr->p_type == PT_LOAD) |
| 737 | { |
| 738 | newsect->flags |= SEC_ALLOC; |
| 739 | newsect->flags |= SEC_LOAD; |
| 740 | if (hdr->p_flags & PF_X) |
| 741 | { |
| 742 | /* FIXME: all we known is that it has execute PERMISSION, |
| 743 | may be data. */ |
| 744 | newsect->flags |= SEC_CODE; |
| 745 | } |
| 746 | } |
| 747 | if (!(hdr->p_flags & PF_W)) |
| 748 | { |
| 749 | newsect->flags |= SEC_READONLY; |
| 750 | } |
| 751 | |
| 752 | if (split) |
| 753 | { |
| 754 | sprintf (namebuf, "segment%db", index); |
| 755 | name = bfd_alloc (abfd, strlen (namebuf) + 1); |
| 756 | strcpy (name, namebuf); |
| 757 | newsect = bfd_make_section (abfd, name); |
| 758 | newsect->vma = hdr->p_vaddr + hdr->p_filesz; |
| 759 | newsect->_raw_size = hdr->p_memsz - hdr->p_filesz; |
| 760 | if (hdr->p_type == PT_LOAD) |
| 761 | { |
| 762 | newsect->flags |= SEC_ALLOC; |
| 763 | if (hdr->p_flags & PF_X) |
| 764 | newsect->flags |= SEC_CODE; |
| 765 | } |
| 766 | if (!(hdr->p_flags & PF_W)) |
| 767 | newsect->flags |= SEC_READONLY; |
| 768 | } |
| 769 | |
| 770 | return true; |
| 771 | } |
| 772 | |
| 773 | /* Begin processing a given object. |
| 774 | |
| 775 | First we validate the file by reading in the ELF header and checking |
| 776 | the magic number. */ |
| 777 | |
| 778 | static INLINE boolean |
| 779 | DEFUN (elf_file_p, (x_ehdrp), Elf_External_Ehdr * x_ehdrp) |
| 780 | { |
| 781 | return ((x_ehdrp->e_ident[EI_MAG0] == ELFMAG0) |
| 782 | && (x_ehdrp->e_ident[EI_MAG1] == ELFMAG1) |
| 783 | && (x_ehdrp->e_ident[EI_MAG2] == ELFMAG2) |
| 784 | && (x_ehdrp->e_ident[EI_MAG3] == ELFMAG3)); |
| 785 | } |
| 786 | |
| 787 | /* Check to see if the file associated with ABFD matches the target vector |
| 788 | that ABFD points to. |
| 789 | |
| 790 | Note that we may be called several times with the same ABFD, but different |
| 791 | target vectors, most of which will not match. We have to avoid leaving |
| 792 | any side effects in ABFD, or any data it points to (like tdata), if the |
| 793 | file does not match the target vector. |
| 794 | |
| 795 | FIXME: There is memory leak if we are called more than once with the same |
| 796 | ABFD, and that bfd already has tdata allocated, since we allocate more tdata |
| 797 | and the old tdata is orphaned. Since it's in the bfd obstack, there isn't |
| 798 | much we can do about this except possibly rewrite the code. There are |
| 799 | also other bfd_allocs that may be the source of memory leaks as well. */ |
| 800 | |
| 801 | bfd_target * |
| 802 | DEFUN (elf_object_p, (abfd), bfd * abfd) |
| 803 | { |
| 804 | Elf_External_Ehdr x_ehdr; /* Elf file header, external form */ |
| 805 | Elf_Internal_Ehdr *i_ehdrp; /* Elf file header, internal form */ |
| 806 | Elf_External_Shdr x_shdr; /* Section header table entry, external form */ |
| 807 | Elf_Internal_Shdr *i_shdrp; /* Section header table, internal form */ |
| 808 | int shindex; |
| 809 | char *shstrtab; /* Internal copy of section header stringtab */ |
| 810 | struct elf_backend_data *ebd; /* Use to get ELF_ARCH stored in xvec */ |
| 811 | struct elf_obj_tdata *preserved_tdata = elf_tdata (abfd); |
| 812 | |
| 813 | /* Read in the ELF header in external format. */ |
| 814 | |
| 815 | if (bfd_read ((PTR) & x_ehdr, sizeof (x_ehdr), 1, abfd) != sizeof (x_ehdr)) |
| 816 | goto got_system_call_error; |
| 817 | |
| 818 | /* Now check to see if we have a valid ELF file, and one that BFD can |
| 819 | make use of. The magic number must match, the address size ('class') |
| 820 | and byte-swapping must match our XVEC entry, and it must have a |
| 821 | section header table (FIXME: See comments re sections at top of this |
| 822 | file). */ |
| 823 | |
| 824 | if ((elf_file_p (&x_ehdr) == false) || |
| 825 | (x_ehdr.e_ident[EI_VERSION] != EV_CURRENT) || |
| 826 | (x_ehdr.e_ident[EI_CLASS] != ELFCLASS)) |
| 827 | goto got_wrong_format_error; |
| 828 | |
| 829 | /* Check that file's byte order matches xvec's */ |
| 830 | switch (x_ehdr.e_ident[EI_DATA]) |
| 831 | { |
| 832 | case ELFDATA2MSB: /* Big-endian */ |
| 833 | if (!abfd->xvec->header_byteorder_big_p) |
| 834 | goto got_wrong_format_error; |
| 835 | break; |
| 836 | case ELFDATA2LSB: /* Little-endian */ |
| 837 | if (abfd->xvec->header_byteorder_big_p) |
| 838 | goto got_wrong_format_error; |
| 839 | break; |
| 840 | case ELFDATANONE: /* No data encoding specified */ |
| 841 | default: /* Unknown data encoding specified */ |
| 842 | goto got_wrong_format_error; |
| 843 | } |
| 844 | |
| 845 | /* Allocate an instance of the elf_obj_tdata structure and hook it up to |
| 846 | the tdata pointer in the bfd. FIXME: memory leak, see above. */ |
| 847 | |
| 848 | elf_tdata (abfd) = |
| 849 | (struct elf_obj_tdata *) bfd_zalloc (abfd, sizeof (struct elf_obj_tdata)); |
| 850 | if (elf_tdata (abfd) == NULL) |
| 851 | goto got_no_memory_error; |
| 852 | |
| 853 | /* Now that we know the byte order, swap in the rest of the header */ |
| 854 | i_ehdrp = elf_elfheader (abfd); |
| 855 | elf_swap_ehdr_in (abfd, &x_ehdr, i_ehdrp); |
| 856 | #if DEBUG & 1 |
| 857 | elf_debug_file (i_ehdrp); |
| 858 | #endif |
| 859 | |
| 860 | /* If there is no section header table, we're hosed. */ |
| 861 | if (i_ehdrp->e_shoff == 0) |
| 862 | goto got_wrong_format_error; |
| 863 | |
| 864 | if (i_ehdrp->e_type == ET_EXEC || i_ehdrp->e_type == ET_DYN) |
| 865 | abfd->flags |= EXEC_P; |
| 866 | |
| 867 | /* Retrieve the architecture information from the xvec and verify |
| 868 | that it matches the machine info stored in the ELF header. |
| 869 | This allows us to resolve ambiguous formats that might not |
| 870 | otherwise be distinguishable. */ |
| 871 | |
| 872 | ebd = get_elf_backend_data (abfd); |
| 873 | |
| 874 | /* Perhaps the elf architecture value should be another field in the |
| 875 | elf backend data? If you change this to work that way, make sure |
| 876 | that you still get bfd_arch_unknown for unknown architecture types, |
| 877 | and that it still gets accepted by the `generic' elf target. */ |
| 878 | { |
| 879 | int i; |
| 880 | enum bfd_architecture arch = bfd_arch_unknown; |
| 881 | |
| 882 | for (i = 0; i < bfd_elf_arch_map_size; i++) |
| 883 | { |
| 884 | if (bfd_elf_arch_map[i].elf_arch == i_ehdrp->e_machine) |
| 885 | { |
| 886 | arch = bfd_elf_arch_map[i].bfd_arch; |
| 887 | break; |
| 888 | } |
| 889 | } |
| 890 | /* start-sanitize-v9 */ |
| 891 | if (i_ehdrp->e_machine == EM_SPARC64) |
| 892 | arch = bfd_arch_sparc; |
| 893 | /* end-sanitize-v9 */ |
| 894 | if (ebd->arch != arch) |
| 895 | goto got_wrong_format_error; |
| 896 | bfd_default_set_arch_mach (abfd, arch, 0); |
| 897 | } |
| 898 | |
| 899 | /* Allocate space for a copy of the section header table in |
| 900 | internal form, seek to the section header table in the file, |
| 901 | read it in, and convert it to internal form. As a simple sanity |
| 902 | check, verify that the what BFD thinks is the size of each section |
| 903 | header table entry actually matches the size recorded in the file. */ |
| 904 | |
| 905 | if (i_ehdrp->e_shentsize != sizeof (x_shdr)) |
| 906 | goto got_wrong_format_error; |
| 907 | i_shdrp = (Elf_Internal_Shdr *) |
| 908 | bfd_alloc (abfd, sizeof (*i_shdrp) * i_ehdrp->e_shnum); |
| 909 | elf_elfsections (abfd) = |
| 910 | (Elf_Internal_Shdr **) bfd_alloc (abfd, sizeof (i_shdrp) * i_ehdrp->e_shnum); |
| 911 | if (!i_shdrp || !elf_elfsections(abfd)) |
| 912 | goto got_no_memory_error; |
| 913 | if (bfd_seek (abfd, i_ehdrp->e_shoff, SEEK_SET) == -1) |
| 914 | goto got_system_call_error; |
| 915 | for (shindex = 0; shindex < i_ehdrp->e_shnum; shindex++) |
| 916 | { |
| 917 | if (bfd_read ((PTR) & x_shdr, sizeof x_shdr, 1, abfd) != sizeof (x_shdr)) |
| 918 | goto got_system_call_error; |
| 919 | elf_swap_shdr_in (abfd, &x_shdr, i_shdrp + shindex); |
| 920 | elf_elfsections(abfd)[shindex] = i_shdrp + shindex; |
| 921 | } |
| 922 | if (i_ehdrp->e_shstrndx) |
| 923 | { |
| 924 | bfd_section_from_shdr (abfd, i_ehdrp->e_shstrndx); |
| 925 | } |
| 926 | |
| 927 | #if 0 |
| 928 | for (shindex = i_ehdrp->e_shnum - 1; shindex >= 0; shindex--) |
| 929 | { |
| 930 | if (!strcmp (elf_string_from_elf_strtab (abfd, |
| 931 | i_shdrp[shindex].sh_name), |
| 932 | ".strtab")) |
| 933 | { |
| 934 | elf_tdata(abfd)->strtab_hdr = i_shdrp[shindex]; |
| 935 | elf_elfsections(abfd)[shindex] = &elf_tdata(abfd)->strtab_hdr; |
| 936 | } |
| 937 | else if (!strcmp (elf_string_from_elf_strtab (abfd, |
| 938 | i_shdrp[shindex].sh_name), |
| 939 | ".symtab")) |
| 940 | { |
| 941 | elf_tdata(abfd)->symtab_hdr = i_shdrp[shindex]; |
| 942 | elf_elfsections(abfd)[shindex] = &elf_tdata(abfd)->symtab_hdr; |
| 943 | elf_onesymtab (abfd) = shindex; |
| 944 | } |
| 945 | } |
| 946 | #endif |
| 947 | |
| 948 | /* Read in the string table containing the names of the sections. We |
| 949 | will need the base pointer to this table later. */ |
| 950 | /* We read this inline now, so that we don't have to go through |
| 951 | bfd_section_from_shdr with it (since this particular strtab is |
| 952 | used to find all of the ELF section names.) */ |
| 953 | |
| 954 | shstrtab = elf_get_str_section (abfd, i_ehdrp->e_shstrndx); |
| 955 | if (!shstrtab) |
| 956 | goto got_wrong_format_error; |
| 957 | |
| 958 | /* Once all of the section headers have been read and converted, we |
| 959 | can start processing them. Note that the first section header is |
| 960 | a dummy placeholder entry, so we ignore it. |
| 961 | |
| 962 | We also watch for the symbol table section and remember the file |
| 963 | offset and section size for both the symbol table section and the |
| 964 | associated string table section. */ |
| 965 | |
| 966 | for (shindex = 1; shindex < i_ehdrp->e_shnum; shindex++) |
| 967 | { |
| 968 | bfd_section_from_shdr (abfd, shindex); |
| 969 | } |
| 970 | |
| 971 | /* Remember the entry point specified in the ELF file header. */ |
| 972 | |
| 973 | bfd_get_start_address (abfd) = i_ehdrp->e_entry; |
| 974 | |
| 975 | return (abfd->xvec); |
| 976 | |
| 977 | /* If we are going to use goto's to avoid duplicating error setting |
| 978 | and return(NULL) code, then this at least makes it more maintainable. */ |
| 979 | |
| 980 | got_system_call_error: |
| 981 | bfd_error = system_call_error; |
| 982 | goto got_no_match; |
| 983 | got_wrong_format_error: |
| 984 | bfd_error = wrong_format; |
| 985 | goto got_no_match; |
| 986 | got_no_memory_error: |
| 987 | bfd_error = no_memory; |
| 988 | goto got_no_match; |
| 989 | got_no_match: |
| 990 | elf_tdata (abfd) = preserved_tdata; |
| 991 | return (NULL); |
| 992 | } |
| 993 | |
| 994 | \f |
| 995 | /* ELF .o/exec file writing */ |
| 996 | |
| 997 | /* Takes a bfd and a symbol, returns a pointer to the elf specific area |
| 998 | of the symbol if there is one. */ |
| 999 | static INLINE elf_symbol_type * |
| 1000 | DEFUN (elf_symbol_from, (ignore_abfd, symbol), |
| 1001 | bfd * ignore_abfd AND |
| 1002 | asymbol * symbol) |
| 1003 | { |
| 1004 | if (symbol->the_bfd->xvec->flavour != bfd_target_elf_flavour) |
| 1005 | return 0; |
| 1006 | |
| 1007 | if (symbol->the_bfd->tdata.elf_obj_data == (struct elf_obj_tdata *) NULL) |
| 1008 | return 0; |
| 1009 | |
| 1010 | return (elf_symbol_type *) symbol; |
| 1011 | } |
| 1012 | |
| 1013 | /* Create ELF output from BFD sections. |
| 1014 | |
| 1015 | Essentially, just create the section header and forget about the program |
| 1016 | header for now. */ |
| 1017 | |
| 1018 | static void |
| 1019 | DEFUN (elf_make_sections, (abfd, asect, obj), |
| 1020 | bfd * abfd AND |
| 1021 | asection * asect AND |
| 1022 | PTR obj) |
| 1023 | { |
| 1024 | /* most of what is in bfd_shdr_from_section goes in here... */ |
| 1025 | /* and all of these sections generate at *least* one ELF section. */ |
| 1026 | int idx; |
| 1027 | |
| 1028 | Elf_Internal_Shdr *this_hdr; |
| 1029 | this_hdr = &elf_section_data (asect)->this_hdr; |
| 1030 | |
| 1031 | this_hdr->sh_addr = asect->vma; |
| 1032 | this_hdr->sh_size = asect->_raw_size; |
| 1033 | /* contents already set by elf_set_section_contents */ |
| 1034 | |
| 1035 | if (asect->flags & SEC_RELOC) |
| 1036 | { |
| 1037 | /* emit a reloc section, and thus strtab and symtab... */ |
| 1038 | Elf_Internal_Shdr *rela_hdr; |
| 1039 | Elf_External_Rela *outbound_relocas; |
| 1040 | Elf_External_Rel *outbound_relocs; |
| 1041 | int use_rela_p = get_elf_backend_data (abfd)->use_rela_p; |
| 1042 | |
| 1043 | rela_hdr = &elf_section_data (asect)->rel_hdr; |
| 1044 | |
| 1045 | /* orelocation has the data, reloc_count has the count... */ |
| 1046 | if (use_rela_p) |
| 1047 | { |
| 1048 | rela_hdr->sh_type = SHT_RELA; |
| 1049 | rela_hdr->sh_entsize = sizeof (Elf_External_Rela); |
| 1050 | } |
| 1051 | else |
| 1052 | /* REL relocations */ |
| 1053 | { |
| 1054 | rela_hdr->sh_type = SHT_REL; |
| 1055 | rela_hdr->sh_entsize = sizeof (Elf_External_Rel); |
| 1056 | } |
| 1057 | rela_hdr->sh_flags = 0; |
| 1058 | rela_hdr->sh_addr = 0; |
| 1059 | rela_hdr->sh_offset = 0; |
| 1060 | rela_hdr->sh_addralign = 0; |
| 1061 | rela_hdr->size = 0; |
| 1062 | } |
| 1063 | if (asect->flags & SEC_ALLOC) |
| 1064 | { |
| 1065 | this_hdr->sh_flags |= SHF_ALLOC; |
| 1066 | if (asect->flags & SEC_LOAD) |
| 1067 | { |
| 1068 | /* @@ Do something with sh_type? */ |
| 1069 | } |
| 1070 | } |
| 1071 | if (!(asect->flags & SEC_READONLY)) |
| 1072 | this_hdr->sh_flags |= SHF_WRITE; |
| 1073 | |
| 1074 | if (asect->flags & SEC_CODE) |
| 1075 | this_hdr->sh_flags |= SHF_EXECINSTR; |
| 1076 | } |
| 1077 | |
| 1078 | void |
| 1079 | write_relocs (abfd, sec, xxx) |
| 1080 | bfd *abfd; |
| 1081 | asection *sec; |
| 1082 | PTR xxx; |
| 1083 | { |
| 1084 | Elf_Internal_Shdr *rela_hdr; |
| 1085 | Elf_External_Rela *outbound_relocas; |
| 1086 | Elf_External_Rel *outbound_relocs; |
| 1087 | int idx; |
| 1088 | int use_rela_p = get_elf_backend_data (abfd)->use_rela_p; |
| 1089 | asymbol *last_sym = 0; |
| 1090 | int last_sym_idx; |
| 1091 | |
| 1092 | if ((sec->flags & SEC_RELOC) == 0) |
| 1093 | return; |
| 1094 | /* Flags are sometimes inconsistent. */ |
| 1095 | if (sec->reloc_count == 0) |
| 1096 | return; |
| 1097 | |
| 1098 | rela_hdr = &elf_section_data (sec)->rel_hdr; |
| 1099 | |
| 1100 | rela_hdr->sh_size = rela_hdr->sh_entsize * sec->reloc_count; |
| 1101 | rela_hdr->contents = (void *) bfd_alloc (abfd, rela_hdr->sh_size); |
| 1102 | |
| 1103 | /* orelocation has the data, reloc_count has the count... */ |
| 1104 | if (use_rela_p) |
| 1105 | { |
| 1106 | outbound_relocas = (Elf_External_Rela *) rela_hdr->contents; |
| 1107 | |
| 1108 | for (idx = 0; idx < sec->reloc_count; idx++) |
| 1109 | { |
| 1110 | Elf_Internal_Rela dst_rela; |
| 1111 | Elf_External_Rela *src_rela; |
| 1112 | arelent *ptr; |
| 1113 | asymbol *sym; |
| 1114 | int n; |
| 1115 | |
| 1116 | ptr = sec->orelocation[idx]; |
| 1117 | src_rela = outbound_relocas + idx; |
| 1118 | if (!(abfd->flags & EXEC_P)) |
| 1119 | dst_rela.r_offset = ptr->address - sec->vma; |
| 1120 | else |
| 1121 | dst_rela.r_offset = ptr->address; |
| 1122 | |
| 1123 | sym = *ptr->sym_ptr_ptr; |
| 1124 | if (sym == last_sym) |
| 1125 | n = last_sym_idx; |
| 1126 | else |
| 1127 | { |
| 1128 | last_sym = sym; |
| 1129 | last_sym_idx = n = elf_symbol_from_bfd_symbol (abfd, &sym); |
| 1130 | } |
| 1131 | dst_rela.r_info = ELF_R_INFO (n, ptr->howto->type); |
| 1132 | |
| 1133 | dst_rela.r_addend = ptr->addend; |
| 1134 | elf_swap_reloca_out (abfd, &dst_rela, src_rela); |
| 1135 | } |
| 1136 | } |
| 1137 | else |
| 1138 | /* REL relocations */ |
| 1139 | { |
| 1140 | outbound_relocs = (Elf_External_Rel *) rela_hdr->contents; |
| 1141 | |
| 1142 | for (idx = 0; idx < sec->reloc_count; idx++) |
| 1143 | { |
| 1144 | Elf_Internal_Rel dst_rel; |
| 1145 | Elf_External_Rel *src_rel; |
| 1146 | arelent *ptr; |
| 1147 | int n; |
| 1148 | asymbol *sym; |
| 1149 | |
| 1150 | ptr = sec->orelocation[idx]; |
| 1151 | sym = *ptr->sym_ptr_ptr; |
| 1152 | src_rel = outbound_relocs + idx; |
| 1153 | if (!(abfd->flags & EXEC_P)) |
| 1154 | dst_rel.r_offset = ptr->address - sec->vma; |
| 1155 | else |
| 1156 | dst_rel.r_offset = ptr->address; |
| 1157 | |
| 1158 | if (sym == last_sym) |
| 1159 | n = last_sym_idx; |
| 1160 | else |
| 1161 | { |
| 1162 | last_sym = sym; |
| 1163 | last_sym_idx = n = elf_symbol_from_bfd_symbol (abfd, &sym); |
| 1164 | } |
| 1165 | dst_rel.r_info = ELF_R_INFO (n, ptr->howto->type); |
| 1166 | |
| 1167 | elf_swap_reloc_out (abfd, &dst_rel, src_rel); |
| 1168 | } |
| 1169 | } |
| 1170 | } |
| 1171 | |
| 1172 | static void |
| 1173 | fix_up_strtabs (abfd, asect, obj) |
| 1174 | bfd *abfd; |
| 1175 | asection *asect; |
| 1176 | PTR obj; |
| 1177 | { |
| 1178 | Elf_Internal_Shdr *this_hdr = &elf_section_data (asect)->this_hdr; |
| 1179 | int this_idx = elf_section_data(asect)->this_idx; |
| 1180 | |
| 1181 | /* @@ Check flags! */ |
| 1182 | if (!strncmp (asect->name, ".stab", 5) |
| 1183 | && !strcmp ("str", asect->name + strlen (asect->name) - 3)) |
| 1184 | { |
| 1185 | size_t len = strlen (asect->name) + 1; |
| 1186 | char *s = (char *) alloca (len); |
| 1187 | strcpy (s, asect->name); |
| 1188 | s[len - 4] = 0; |
| 1189 | asect = bfd_get_section_by_name (abfd, s); |
| 1190 | if (!asect) |
| 1191 | abort (); |
| 1192 | elf_section_data(asect)->this_hdr.sh_link = this_idx; |
| 1193 | |
| 1194 | /* @@ Assuming 32 bits! */ |
| 1195 | this_hdr->sh_entsize = 0xc; |
| 1196 | } |
| 1197 | } |
| 1198 | |
| 1199 | static void |
| 1200 | DEFUN (elf_fake_sections, (abfd, asect, obj), |
| 1201 | bfd * abfd AND |
| 1202 | asection * asect AND |
| 1203 | PTR obj) |
| 1204 | { |
| 1205 | /* most of what is in bfd_shdr_from_section goes in here... */ |
| 1206 | /* and all of these sections generate at *least* one ELF section. */ |
| 1207 | |
| 1208 | Elf_Internal_Shdr *this_hdr; |
| 1209 | this_hdr = &elf_section_data (asect)->this_hdr; |
| 1210 | this_hdr->sh_name = |
| 1211 | bfd_add_to_strtab (abfd, elf_shstrtab (abfd), asect->name); |
| 1212 | /* We need to log the type *now* so that elf_section_from_bfd_section |
| 1213 | can find us... have to set rawdata too. */ |
| 1214 | this_hdr->rawdata = (void *) asect; |
| 1215 | this_hdr->sh_addralign = 1 << asect->alignment_power; |
| 1216 | if ((asect->flags & SEC_ALLOC) && (asect->flags & SEC_LOAD)) |
| 1217 | this_hdr->sh_type = SHT_PROGBITS; |
| 1218 | else if ((asect->flags & SEC_ALLOC) && ((asect->flags & SEC_LOAD) == 0)) |
| 1219 | { |
| 1220 | BFD_ASSERT (!strcmp (asect->name, ".bss")); |
| 1221 | this_hdr->sh_type = SHT_NOBITS; |
| 1222 | } |
| 1223 | /* FIXME I am not sure how to detect a .note section from the flags |
| 1224 | word of an `asection'. */ |
| 1225 | else if (!strcmp (asect->name, ".note")) |
| 1226 | this_hdr->sh_type = SHT_NOTE; |
| 1227 | else |
| 1228 | this_hdr->sh_type = SHT_PROGBITS; |
| 1229 | |
| 1230 | /* Now, check for processor-specific section types. */ |
| 1231 | { |
| 1232 | struct elf_backend_data *bed = get_elf_backend_data (abfd); |
| 1233 | |
| 1234 | if (bed->elf_backend_fake_sections) |
| 1235 | (*bed->elf_backend_fake_sections) (abfd, this_hdr, asect); |
| 1236 | } |
| 1237 | |
| 1238 | this_hdr->sh_flags = 0; |
| 1239 | this_hdr->sh_addr = 0; |
| 1240 | this_hdr->sh_size = 0; |
| 1241 | this_hdr->sh_entsize = 0; |
| 1242 | this_hdr->sh_info = 0; |
| 1243 | this_hdr->sh_link = 0; |
| 1244 | this_hdr->sh_offset = 0; |
| 1245 | this_hdr->size = 0; |
| 1246 | |
| 1247 | { |
| 1248 | /* Emit a strtab and symtab, and possibly a reloc section. */ |
| 1249 | Elf_Internal_Shdr *rela_hdr; |
| 1250 | Elf_Internal_Shdr *symstrtab_hdr; |
| 1251 | |
| 1252 | /* Note that only one symtab is used, so just remember it |
| 1253 | for now. */ |
| 1254 | |
| 1255 | if (asect->flags & SEC_RELOC) |
| 1256 | { |
| 1257 | int use_rela_p = get_elf_backend_data (abfd)->use_rela_p; |
| 1258 | |
| 1259 | rela_hdr = &elf_section_data (asect)->rel_hdr; |
| 1260 | rela_hdr->sh_name = |
| 1261 | bfd_add_2_to_strtab (abfd, elf_shstrtab (abfd), |
| 1262 | use_rela_p ? ".rela" : ".rel", |
| 1263 | asect->name); |
| 1264 | rela_hdr->sh_type = use_rela_p ? SHT_RELA : SHT_REL; |
| 1265 | rela_hdr->sh_entsize = (use_rela_p |
| 1266 | ? sizeof (Elf_External_Rela) |
| 1267 | : sizeof (Elf_External_Rel)); |
| 1268 | |
| 1269 | rela_hdr->sh_flags = 0; |
| 1270 | rela_hdr->sh_addr = 0; |
| 1271 | rela_hdr->sh_size = 0; |
| 1272 | rela_hdr->sh_offset = 0; |
| 1273 | rela_hdr->sh_addralign = 0; |
| 1274 | rela_hdr->size = 0; |
| 1275 | } |
| 1276 | } |
| 1277 | if (asect->flags & SEC_ALLOC) |
| 1278 | { |
| 1279 | this_hdr->sh_flags |= SHF_ALLOC; |
| 1280 | if (asect->flags & SEC_LOAD) |
| 1281 | { |
| 1282 | /* @@ Do something with sh_type? */ |
| 1283 | } |
| 1284 | } |
| 1285 | if (!(asect->flags & SEC_READONLY)) |
| 1286 | this_hdr->sh_flags |= SHF_WRITE; |
| 1287 | if (asect->flags & SEC_CODE) |
| 1288 | this_hdr->sh_flags |= SHF_EXECINSTR; |
| 1289 | } |
| 1290 | |
| 1291 | |
| 1292 | #if 0 |
| 1293 | /* |
| 1294 | xxxINTERNAL_FUNCTION |
| 1295 | bfd_elf_locate_sh |
| 1296 | |
| 1297 | xxxSYNOPSIS |
| 1298 | struct elf_internal_shdr *bfd_elf_locate_sh (bfd *abfd, |
| 1299 | struct strtab *strtab, |
| 1300 | struct elf_internal_shdr *shdrp, |
| 1301 | CONST char *name); |
| 1302 | |
| 1303 | xxxDESCRIPTION |
| 1304 | Helper function to locate an ELF section header given the |
| 1305 | name of a BFD section. |
| 1306 | */ |
| 1307 | |
| 1308 | static struct elf_internal_shdr * |
| 1309 | DEFUN (elf_locate_sh, (abfd, strtab, shdrp, name), |
| 1310 | bfd * abfd AND |
| 1311 | struct strtab *strtab AND |
| 1312 | struct elf_internal_shdr *shdrp AND |
| 1313 | CONST char *name) |
| 1314 | { |
| 1315 | Elf_Internal_Shdr *gotit = NULL; |
| 1316 | int max, i; |
| 1317 | |
| 1318 | if (shdrp != NULL && strtab != NULL) |
| 1319 | { |
| 1320 | max = elf_elfheader (abfd)->e_shnum; |
| 1321 | for (i = 1; i < max; i++) |
| 1322 | { |
| 1323 | if (!strcmp (strtab->tab + shdrp[i].sh_name, name)) |
| 1324 | { |
| 1325 | gotit = &shdrp[i]; |
| 1326 | } |
| 1327 | } |
| 1328 | } |
| 1329 | return gotit; |
| 1330 | } |
| 1331 | #endif |
| 1332 | |
| 1333 | /* Map symbol from it's internal number to the external number, moving |
| 1334 | all local symbols to be at the head of the list. */ |
| 1335 | |
| 1336 | static INLINE int |
| 1337 | sym_is_global (sym) |
| 1338 | asymbol *sym; |
| 1339 | { |
| 1340 | if (sym->flags & (BSF_GLOBAL | BSF_WEAK)) |
| 1341 | { |
| 1342 | if (sym->flags & BSF_LOCAL) |
| 1343 | abort (); |
| 1344 | return 1; |
| 1345 | } |
| 1346 | if (sym->section == 0) |
| 1347 | { |
| 1348 | /* Is this valid? */ |
| 1349 | abort (); |
| 1350 | |
| 1351 | return 1; |
| 1352 | } |
| 1353 | if (sym->section == &bfd_und_section) |
| 1354 | return 1; |
| 1355 | if (bfd_is_com_section (sym->section)) |
| 1356 | return 1; |
| 1357 | if (sym->flags & (BSF_LOCAL | BSF_SECTION_SYM | BSF_FILE)) |
| 1358 | return 0; |
| 1359 | return 0; |
| 1360 | } |
| 1361 | |
| 1362 | static void |
| 1363 | DEFUN (elf_map_symbols, (abfd), bfd * abfd) |
| 1364 | { |
| 1365 | int symcount = bfd_get_symcount (abfd); |
| 1366 | asymbol **syms = bfd_get_outsymbols (abfd); |
| 1367 | asymbol **sect_syms; |
| 1368 | int num_locals = 0; |
| 1369 | int num_globals = 0; |
| 1370 | int num_locals2 = 0; |
| 1371 | int num_globals2 = 0; |
| 1372 | int max_index = 0; |
| 1373 | int num_sections = 0; |
| 1374 | Elf_Sym_Extra *sym_extra; |
| 1375 | int idx; |
| 1376 | asection *asect; |
| 1377 | |
| 1378 | #ifdef DEBUG |
| 1379 | fprintf (stderr, "elf_map_symbols\n"); |
| 1380 | fflush (stderr); |
| 1381 | #endif |
| 1382 | |
| 1383 | /* Add local symbols for each section for which there are relocs. |
| 1384 | FIXME: How can we tell which sections have relocs at this point? |
| 1385 | Will reloc_count always be accurate? Actually, I think most ELF |
| 1386 | targets create section symbols for all sections anyhow. */ |
| 1387 | for (asect = abfd->sections; asect; asect = asect->next) |
| 1388 | { |
| 1389 | if (max_index < asect->index) |
| 1390 | max_index = asect->index; |
| 1391 | } |
| 1392 | |
| 1393 | max_index++; |
| 1394 | elf_num_section_syms (abfd) = max_index; |
| 1395 | sect_syms = (asymbol **) bfd_zalloc (abfd, max_index * sizeof (asymbol *)); |
| 1396 | elf_section_syms (abfd) = sect_syms; |
| 1397 | |
| 1398 | BFD_ASSERT (sect_syms != 0); |
| 1399 | |
| 1400 | for (asect = abfd->sections; asect; asect = asect->next) |
| 1401 | { |
| 1402 | asymbol *sym = bfd_make_empty_symbol (abfd); |
| 1403 | sym->the_bfd = abfd; |
| 1404 | sym->name = asect->name; |
| 1405 | sym->value = asect->vma; |
| 1406 | sym->flags = BSF_SECTION_SYM; |
| 1407 | sym->section = asect; |
| 1408 | sect_syms[asect->index] = sym; |
| 1409 | num_sections++; |
| 1410 | #ifdef DEBUG |
| 1411 | fprintf (stderr, |
| 1412 | "creating section symbol, name = %s, value = 0x%.8lx, index = %d, section = 0x%.8lx\n", |
| 1413 | asect->name, (long) asect->vma, asect->index, (long) asect); |
| 1414 | #endif |
| 1415 | } |
| 1416 | |
| 1417 | if (num_sections) |
| 1418 | { |
| 1419 | if (syms) |
| 1420 | syms = (asymbol **) bfd_realloc (abfd, syms, |
| 1421 | ((symcount + num_sections + 1) |
| 1422 | * sizeof (asymbol *))); |
| 1423 | else |
| 1424 | syms = (asymbol **) bfd_alloc (abfd, |
| 1425 | (num_sections + 1) * sizeof (asymbol *)); |
| 1426 | |
| 1427 | for (asect = abfd->sections; asect; asect = asect->next) |
| 1428 | { |
| 1429 | if (sect_syms[asect->index]) |
| 1430 | syms[symcount++] = sect_syms[asect->index]; |
| 1431 | } |
| 1432 | |
| 1433 | syms[symcount] = (asymbol *) 0; |
| 1434 | bfd_set_symtab (abfd, syms, symcount); |
| 1435 | } |
| 1436 | |
| 1437 | elf_sym_extra (abfd) = sym_extra |
| 1438 | = (Elf_Sym_Extra *) bfd_alloc (abfd, symcount * sizeof (Elf_Sym_Extra)); |
| 1439 | |
| 1440 | /* Identify and classify all of the symbols. */ |
| 1441 | for (idx = 0; idx < symcount; idx++) |
| 1442 | { |
| 1443 | if (!sym_is_global (syms[idx])) |
| 1444 | num_locals++; |
| 1445 | else |
| 1446 | num_globals++; |
| 1447 | } |
| 1448 | |
| 1449 | /* Now provide mapping information. Add +1 for skipping over the |
| 1450 | dummy symbol. */ |
| 1451 | for (idx = 0; idx < symcount; idx++) |
| 1452 | { |
| 1453 | syms[idx]->udata = (PTR) &sym_extra[idx]; |
| 1454 | if (!sym_is_global (syms[idx])) |
| 1455 | sym_extra[idx].elf_sym_num = 1 + num_locals2++; |
| 1456 | else |
| 1457 | sym_extra[idx].elf_sym_num = 1 + num_locals + num_globals2++; |
| 1458 | } |
| 1459 | |
| 1460 | elf_num_locals (abfd) = num_locals; |
| 1461 | elf_num_globals (abfd) = num_globals; |
| 1462 | } |
| 1463 | |
| 1464 | static void assign_section_numbers (); |
| 1465 | static void assign_file_positions_except_relocs (); |
| 1466 | |
| 1467 | static boolean |
| 1468 | DEFUN (elf_compute_section_file_positions, (abfd), bfd * abfd) |
| 1469 | { |
| 1470 | Elf_Internal_Ehdr *i_ehdrp; /* Elf file header, internal form */ |
| 1471 | Elf_Internal_Shdr *i_shdrp; /* Section header table, internal form */ |
| 1472 | struct strtab *shstrtab; |
| 1473 | int count, maxsections; |
| 1474 | |
| 1475 | bfd_map_over_sections (abfd, elf_fake_sections, 0); |
| 1476 | |
| 1477 | assign_section_numbers (abfd); |
| 1478 | |
| 1479 | bfd_map_over_sections (abfd, elf_make_sections, 0); |
| 1480 | |
| 1481 | bfd_map_over_sections (abfd, fix_up_strtabs, 0); /* .stab/.stabstr &c */ |
| 1482 | |
| 1483 | swap_out_syms (abfd); |
| 1484 | |
| 1485 | assign_file_positions_except_relocs (abfd); |
| 1486 | |
| 1487 | return true; |
| 1488 | } |
| 1489 | |
| 1490 | static boolean |
| 1491 | DEFUN (elf_write_phdrs, (abfd, i_ehdrp, i_phdrp, phdr_cnt), |
| 1492 | bfd * abfd AND |
| 1493 | Elf_Internal_Ehdr * i_ehdrp AND |
| 1494 | Elf_Internal_Phdr * i_phdrp AND |
| 1495 | Elf32_Half phdr_cnt) |
| 1496 | { |
| 1497 | /* first program header entry goes after the file header */ |
| 1498 | int outbase = i_ehdrp->e_phoff; |
| 1499 | int i; |
| 1500 | Elf_External_Phdr x_phdr; |
| 1501 | |
| 1502 | for (i = 0; i < phdr_cnt; i++) |
| 1503 | { |
| 1504 | elf_swap_phdr_out (abfd, i_phdrp + i, &x_phdr); |
| 1505 | bfd_seek (abfd, outbase, SEEK_SET); |
| 1506 | bfd_write ((PTR) & x_phdr, sizeof (x_phdr), 1, abfd); |
| 1507 | outbase += sizeof (x_phdr); |
| 1508 | } |
| 1509 | |
| 1510 | return true; |
| 1511 | } |
| 1512 | |
| 1513 | static const Elf_Internal_Shdr null_shdr; |
| 1514 | |
| 1515 | /* Assign all ELF section numbers. The dummy first section is handled here |
| 1516 | too. The link/info pointers for the standard section types are filled |
| 1517 | in here too, while we're at it. (Link pointers for .stab sections are |
| 1518 | not filled in here.) */ |
| 1519 | static void |
| 1520 | assign_section_numbers (abfd) |
| 1521 | bfd *abfd; |
| 1522 | { |
| 1523 | struct elf_obj_tdata *t = elf_tdata (abfd); |
| 1524 | asection *sec; |
| 1525 | int section_number = 1; |
| 1526 | int i; |
| 1527 | Elf_Internal_Shdr **i_shdrp; |
| 1528 | |
| 1529 | t->shstrtab_hdr.sh_size = elf_shstrtab(abfd)->length; |
| 1530 | t->shstrtab_hdr.contents = (void *) elf_shstrtab(abfd)->tab; |
| 1531 | shstrtab_length_fixed = 1; |
| 1532 | |
| 1533 | t->shstrtab_section = section_number++; |
| 1534 | elf_elfheader(abfd)->e_shstrndx = t->shstrtab_section; |
| 1535 | if (abfd->symcount) |
| 1536 | { |
| 1537 | t->symtab_section = section_number++; |
| 1538 | t->strtab_section = section_number++; |
| 1539 | t->symtab_hdr.sh_link = t->strtab_section; |
| 1540 | } |
| 1541 | for (sec = abfd->sections; sec; sec = sec->next) |
| 1542 | { |
| 1543 | struct bfd_elf_section_data *d = elf_section_data (sec); |
| 1544 | d->this_idx = section_number++; |
| 1545 | if (sec->flags & SEC_RELOC) |
| 1546 | { |
| 1547 | d->rel_idx = section_number++; |
| 1548 | d->rel_hdr.sh_link = t->symtab_section; |
| 1549 | d->rel_hdr.sh_info = d->this_idx; |
| 1550 | } |
| 1551 | else |
| 1552 | d->rel_idx = 0; |
| 1553 | /* No handling for per-section string tables currently. */ |
| 1554 | } |
| 1555 | elf_elfheader(abfd)->e_shnum = section_number; |
| 1556 | |
| 1557 | /* Set up the list of section header pointers, in agreement with the |
| 1558 | indices. */ |
| 1559 | i_shdrp = (Elf_Internal_Shdr **) |
| 1560 | bfd_alloc (abfd, section_number * sizeof (Elf_Internal_Shdr *)); |
| 1561 | elf_elfsections(abfd) = i_shdrp; |
| 1562 | for (i = 0; i < section_number; i++) |
| 1563 | i_shdrp[i] = 0; |
| 1564 | |
| 1565 | i_shdrp[0] = (Elf_Internal_Shdr *) &null_shdr; |
| 1566 | i_shdrp[t->shstrtab_section] = &t->shstrtab_hdr; |
| 1567 | if (abfd->symcount) |
| 1568 | { |
| 1569 | i_shdrp[t->symtab_section] = &t->symtab_hdr; |
| 1570 | i_shdrp[t->strtab_section] = &t->strtab_hdr; |
| 1571 | } |
| 1572 | for (sec = abfd->sections; sec; sec = sec->next) |
| 1573 | { |
| 1574 | struct bfd_elf_section_data *d = elf_section_data (sec); |
| 1575 | i_shdrp[d->this_idx] = &d->this_hdr; |
| 1576 | if (d->rel_idx) |
| 1577 | i_shdrp[d->rel_idx] = &d->rel_hdr; |
| 1578 | } |
| 1579 | /* Make sure we got everything.... */ |
| 1580 | for (i = 0; i < section_number; i++) |
| 1581 | if (i_shdrp[i] == 0) |
| 1582 | abort (); |
| 1583 | } |
| 1584 | |
| 1585 | static INLINE file_ptr |
| 1586 | assign_file_position_for_section (i_shdrp, offset) |
| 1587 | Elf_Internal_Shdr *i_shdrp; |
| 1588 | file_ptr offset; |
| 1589 | { |
| 1590 | i_shdrp->sh_offset = offset; |
| 1591 | if (i_shdrp->sh_type != SHT_NOBITS) |
| 1592 | offset += i_shdrp->sh_size; |
| 1593 | return offset; |
| 1594 | } |
| 1595 | |
| 1596 | static INLINE file_ptr |
| 1597 | assign_file_positions_for_symtab_and_strtabs (abfd, off) |
| 1598 | bfd *abfd; |
| 1599 | file_ptr off; |
| 1600 | { |
| 1601 | struct elf_obj_tdata *t = elf_tdata (abfd); |
| 1602 | |
| 1603 | off = assign_file_position_for_section (&t->shstrtab_hdr, off); |
| 1604 | off = assign_file_position_for_section (&t->symtab_hdr, off); |
| 1605 | off = assign_file_position_for_section (&t->strtab_hdr, off); |
| 1606 | return off; |
| 1607 | } |
| 1608 | |
| 1609 | struct seg_info { |
| 1610 | bfd_vma low, mem_size; |
| 1611 | file_ptr file_size; |
| 1612 | int start_pos; |
| 1613 | int sh_flags; |
| 1614 | struct seg_info *next; |
| 1615 | }; |
| 1616 | |
| 1617 | static void |
| 1618 | map_program_segments (abfd) |
| 1619 | bfd *abfd; |
| 1620 | { |
| 1621 | Elf_Internal_Shdr **i_shdrpp = elf_elfsections (abfd); |
| 1622 | Elf_Internal_Ehdr *i_ehdrp = elf_elfheader (abfd); |
| 1623 | Elf_Internal_Shdr *i_shdrp; |
| 1624 | Elf_Internal_Phdr *phdr; |
| 1625 | char *done; |
| 1626 | int i, n_left = 0; |
| 1627 | file_ptr lowest_offset = 0; |
| 1628 | struct seg_info *seg = 0; |
| 1629 | |
| 1630 | done = (char *) alloca (i_ehdrp->e_shnum); |
| 1631 | memset (done, 0, i_ehdrp->e_shnum); |
| 1632 | for (i = 0; i < i_ehdrp->e_shnum; i++) |
| 1633 | { |
| 1634 | i_shdrp = i_shdrpp[i]; |
| 1635 | /* If it's going to be mapped in, it's been assigned a position. */ |
| 1636 | if (i_shdrp->sh_offset + 1 == 0) |
| 1637 | { |
| 1638 | /* Well, not really, but we won't process it here. */ |
| 1639 | done[i] = 1; |
| 1640 | continue; |
| 1641 | } |
| 1642 | if (i_shdrp->sh_offset < lowest_offset |
| 1643 | || lowest_offset == 0) |
| 1644 | lowest_offset = i_shdrp->sh_offset; |
| 1645 | /* Only interested in PROGBITS or NOBITS for generating segments. */ |
| 1646 | switch (i_shdrp->sh_type) |
| 1647 | { |
| 1648 | case SHT_PROGBITS: |
| 1649 | case SHT_NOBITS: |
| 1650 | break; |
| 1651 | default: |
| 1652 | done[i] = 1; |
| 1653 | } |
| 1654 | if (!done[i]) |
| 1655 | n_left++; |
| 1656 | } |
| 1657 | while (n_left) |
| 1658 | { |
| 1659 | bfd_vma lowest_vma = -1, high; |
| 1660 | int low_sec = 0; |
| 1661 | int mem_size; |
| 1662 | int file_size = 0; |
| 1663 | |
| 1664 | for (i = 1; i < i_ehdrp->e_shnum; i++) |
| 1665 | { |
| 1666 | i_shdrp = i_shdrpp[i]; |
| 1667 | if (!done[i] && i_shdrp->sh_addr < lowest_vma) |
| 1668 | { |
| 1669 | lowest_vma = i_shdrp->sh_addr; |
| 1670 | low_sec = i; |
| 1671 | } |
| 1672 | } |
| 1673 | if (low_sec == 0) |
| 1674 | abort (); |
| 1675 | /* So now we know the lowest vma of any unassigned sections; start |
| 1676 | a segment there. */ |
| 1677 | { |
| 1678 | struct seg_info *s; |
| 1679 | s = (struct seg_info *) bfd_alloc (abfd, sizeof (struct seg_info)); |
| 1680 | s->next = seg; |
| 1681 | seg = s; |
| 1682 | } |
| 1683 | seg->low = lowest_vma; |
| 1684 | i_shdrp = i_shdrpp[low_sec]; |
| 1685 | seg->start_pos = i_shdrp->sh_offset; |
| 1686 | seg->sh_flags = i_shdrp->sh_flags; |
| 1687 | done[low_sec] = 1, n_left--; |
| 1688 | mem_size = i_shdrp->sh_size; |
| 1689 | high = lowest_vma + i_shdrp->sh_size; |
| 1690 | |
| 1691 | if (i_shdrp->sh_type == SHT_PROGBITS) |
| 1692 | file_size = i_shdrp->sh_size; |
| 1693 | |
| 1694 | for (i = 0; i < i_ehdrp->e_shnum; i++) |
| 1695 | { |
| 1696 | file_ptr f1; |
| 1697 | |
| 1698 | if (file_size != mem_size) |
| 1699 | break; |
| 1700 | if (done[i]) |
| 1701 | continue; |
| 1702 | i_shdrp = i_shdrpp[i]; |
| 1703 | /* position of next byte on disk */ |
| 1704 | f1 = seg->start_pos + file_size; |
| 1705 | if (i_shdrp->sh_type == SHT_PROGBITS) |
| 1706 | { |
| 1707 | if (i_shdrp->sh_offset - f1 != i_shdrp->sh_addr - high) |
| 1708 | continue; |
| 1709 | } |
| 1710 | else /* sh_type == NOBITS */ |
| 1711 | { |
| 1712 | /* If the section in question has no contents in the disk |
| 1713 | file, we really don't care where it supposedly starts. |
| 1714 | But we don't want to bother merging it into this segment |
| 1715 | if it doesn't start on this memory page. */ |
| 1716 | bfd_vma page1, page2; |
| 1717 | bfd_vma maxpagesize = get_elf_backend_data (abfd)->maxpagesize; |
| 1718 | |
| 1719 | /* page number in address space of current end of seg */ |
| 1720 | page1 = (high - 1 + maxpagesize - 1) / maxpagesize; |
| 1721 | /* page number in address space of start of this section */ |
| 1722 | page2 = (i_shdrp->sh_addr + maxpagesize - 1) / maxpagesize; |
| 1723 | |
| 1724 | if (page1 != page2) |
| 1725 | continue; |
| 1726 | } |
| 1727 | done[i] = 1, n_left--; |
| 1728 | if (i_shdrp->sh_type == SHT_PROGBITS) |
| 1729 | file_size = i_shdrp->sh_offset + i_shdrp->sh_size - seg->start_pos; |
| 1730 | mem_size = i_shdrp->sh_addr + i_shdrp->sh_size - seg->low; |
| 1731 | high = i_shdrp->sh_addr + i_shdrp->sh_size; |
| 1732 | i = 0; |
| 1733 | } |
| 1734 | seg->file_size = file_size; |
| 1735 | seg->mem_size = mem_size; |
| 1736 | } |
| 1737 | /* Now do something with the list of segments we've built up. */ |
| 1738 | { |
| 1739 | bfd_vma maxpagesize = get_elf_backend_data (abfd)->maxpagesize; |
| 1740 | struct seg_info *s; |
| 1741 | int n_segs = 0; |
| 1742 | int sz; |
| 1743 | |
| 1744 | for (s = seg; s; s = s->next) |
| 1745 | { |
| 1746 | n_segs++; |
| 1747 | } |
| 1748 | i_ehdrp->e_phentsize = sizeof (Elf_External_Phdr); |
| 1749 | sz = sizeof (Elf_External_Phdr) * n_segs; |
| 1750 | if (i_ehdrp->e_ehsize + sz <= lowest_offset) |
| 1751 | i_ehdrp->e_phoff = i_ehdrp->e_ehsize; |
| 1752 | else |
| 1753 | { |
| 1754 | i_ehdrp->e_phoff = elf_tdata (abfd)->next_file_pos; |
| 1755 | elf_tdata (abfd)->next_file_pos += sz; |
| 1756 | } |
| 1757 | phdr = (Elf_Internal_Phdr*) bfd_alloc (abfd, |
| 1758 | n_segs * sizeof (Elf_Internal_Phdr)); |
| 1759 | elf_tdata (abfd)->phdr = phdr; |
| 1760 | while (seg) |
| 1761 | { |
| 1762 | phdr->p_type = PT_LOAD; /* only type we really support so far */ |
| 1763 | phdr->p_offset = seg->start_pos; |
| 1764 | phdr->p_vaddr = seg->low; |
| 1765 | phdr->p_paddr = 0; |
| 1766 | phdr->p_filesz = seg->file_size; |
| 1767 | phdr->p_memsz = seg->mem_size; |
| 1768 | phdr->p_flags = PF_R; |
| 1769 | phdr->p_align = maxpagesize; /* ? */ |
| 1770 | if (seg->sh_flags & SHF_WRITE) |
| 1771 | /* SysVr4 ELF docs say "data segments normally have read, write, |
| 1772 | and execute permissions." */ |
| 1773 | phdr->p_flags |= (PF_W | PF_X); |
| 1774 | if (seg->sh_flags & SHF_EXECINSTR) |
| 1775 | phdr->p_flags |= PF_X; |
| 1776 | phdr++; |
| 1777 | seg = seg->next; |
| 1778 | } |
| 1779 | i_ehdrp->e_phnum = n_segs; |
| 1780 | } |
| 1781 | elf_write_phdrs (abfd, i_ehdrp, elf_tdata (abfd)->phdr, i_ehdrp->e_phnum); |
| 1782 | } |
| 1783 | |
| 1784 | static void |
| 1785 | assign_file_positions_except_relocs (abfd) |
| 1786 | bfd *abfd; |
| 1787 | { |
| 1788 | /* For now, we ignore the possibility of having program segments, which |
| 1789 | may require some alignment in the file. That'll require padding, and |
| 1790 | some interesting calculations to optimize file space usage. |
| 1791 | |
| 1792 | Also, since the application may change the list of relocations for |
| 1793 | a given section, we don't figure them in here. We'll put them at the |
| 1794 | end of the file, at positions computed during bfd_close. |
| 1795 | |
| 1796 | The order, for now: <ehdr> <shdr> <sec1> <sec2> <sec3> ... <rel1> ... |
| 1797 | or: <ehdr> <phdr> <sec1> <sec2> ... <shdr> <rel1> ... */ |
| 1798 | |
| 1799 | file_ptr off; |
| 1800 | int i; |
| 1801 | Elf_Internal_Shdr **i_shdrpp = elf_elfsections (abfd); |
| 1802 | Elf_Internal_Shdr *i_shdrp; |
| 1803 | Elf_Internal_Ehdr *i_ehdrp = elf_elfheader (abfd); |
| 1804 | int exec_p = (abfd->flags & EXEC_P) != 0; |
| 1805 | |
| 1806 | /* Everything starts after the ELF file header. */ |
| 1807 | off = i_ehdrp->e_ehsize; |
| 1808 | |
| 1809 | if (!exec_p) |
| 1810 | { |
| 1811 | /* Section headers. */ |
| 1812 | i_ehdrp->e_shoff = off; |
| 1813 | off += i_ehdrp->e_shnum * i_ehdrp->e_shentsize; |
| 1814 | |
| 1815 | off = assign_file_positions_for_symtab_and_strtabs (abfd, off); |
| 1816 | } |
| 1817 | for (i = 0; i < i_ehdrp->e_shnum; i++) |
| 1818 | { |
| 1819 | i_shdrp = i_shdrpp[i]; |
| 1820 | if (i_shdrp->sh_type == SHT_REL || i_shdrp->sh_type == SHT_RELA) |
| 1821 | { |
| 1822 | i_shdrp->sh_offset = -1; |
| 1823 | continue; |
| 1824 | } |
| 1825 | if (exec_p) |
| 1826 | { |
| 1827 | bfd_vma maxpagesize = get_elf_backend_data (abfd)->maxpagesize; |
| 1828 | if (maxpagesize == 0) |
| 1829 | maxpagesize = 1; /* make the arithmetic work */ |
| 1830 | /* This isn't necessarily going to give the best packing, if the |
| 1831 | segments require padding between them, but since that isn't |
| 1832 | usually the case, this'll do. */ |
| 1833 | if ((i_shdrp->sh_flags & SHF_ALLOC) == 0) |
| 1834 | { |
| 1835 | i_shdrp->sh_offset = -1; |
| 1836 | continue; |
| 1837 | } |
| 1838 | /* Blindly assume that the segments are ordered optimally. With |
| 1839 | the default LD script, they will be. */ |
| 1840 | { |
| 1841 | /* need big unsigned type */ |
| 1842 | bfd_vma addtl_off; |
| 1843 | addtl_off = i_shdrp->sh_addr - off; |
| 1844 | addtl_off = addtl_off % maxpagesize; |
| 1845 | if (addtl_off) |
| 1846 | { |
| 1847 | off += addtl_off; |
| 1848 | } |
| 1849 | } |
| 1850 | if (i_shdrp->sh_type == SHT_NOBITS) |
| 1851 | { |
| 1852 | file_ptr off2; |
| 1853 | i_shdrp->sh_offset = off; |
| 1854 | if (off % maxpagesize != 0) |
| 1855 | off2 = maxpagesize - (off % maxpagesize); |
| 1856 | if (off2 > i_shdrp->sh_size) |
| 1857 | off2 = i_shdrp->sh_size; |
| 1858 | off += off2; |
| 1859 | } |
| 1860 | } |
| 1861 | off = assign_file_position_for_section (i_shdrp, off); |
| 1862 | if (exec_p |
| 1863 | && get_elf_backend_data(abfd)->maxpagesize > 1 |
| 1864 | && i_shdrp->sh_type == SHT_PROGBITS |
| 1865 | && (i_shdrp->sh_flags & SHF_ALLOC) |
| 1866 | && (i_shdrp->sh_offset - i_shdrp->sh_addr) % get_elf_backend_data(abfd)->maxpagesize != 0) |
| 1867 | abort (); |
| 1868 | } |
| 1869 | if (exec_p) |
| 1870 | { |
| 1871 | elf_tdata (abfd)->next_file_pos = off; |
| 1872 | map_program_segments (abfd); |
| 1873 | off = elf_tdata (abfd)->next_file_pos; |
| 1874 | |
| 1875 | /* Section headers. */ |
| 1876 | i_ehdrp->e_shoff = off; |
| 1877 | off += i_ehdrp->e_shnum * i_ehdrp->e_shentsize; |
| 1878 | |
| 1879 | off = assign_file_positions_for_symtab_and_strtabs (abfd, off); |
| 1880 | |
| 1881 | for (i = 0; i < i_ehdrp->e_shnum; i++) |
| 1882 | { |
| 1883 | i_shdrp = i_shdrpp[i]; |
| 1884 | if (i_shdrp->sh_offset + 1 == 0 |
| 1885 | && i_shdrp->sh_type != SHT_REL |
| 1886 | && i_shdrp->sh_type != SHT_RELA) |
| 1887 | off = assign_file_position_for_section (i_shdrp, off); |
| 1888 | } |
| 1889 | } |
| 1890 | elf_tdata (abfd)->next_file_pos = off; |
| 1891 | } |
| 1892 | |
| 1893 | static boolean |
| 1894 | prep_headers (abfd) |
| 1895 | bfd *abfd; |
| 1896 | { |
| 1897 | Elf_External_Ehdr x_ehdr; /* Elf file header, external form */ |
| 1898 | Elf_Internal_Ehdr *i_ehdrp; /* Elf file header, internal form */ |
| 1899 | Elf_Internal_Phdr *i_phdrp = 0; /* Program header table, internal form */ |
| 1900 | Elf_External_Shdr *x_shdrp; /* Section header table, external form */ |
| 1901 | Elf_Internal_Shdr **i_shdrp; /* Section header table, internal form */ |
| 1902 | |
| 1903 | int count; |
| 1904 | int scnt; |
| 1905 | struct strtab *shstrtab; |
| 1906 | |
| 1907 | i_ehdrp = elf_elfheader (abfd); |
| 1908 | i_shdrp = elf_elfsections (abfd); |
| 1909 | |
| 1910 | shstrtab = bfd_new_strtab (abfd); |
| 1911 | elf_shstrtab (abfd) = shstrtab; |
| 1912 | |
| 1913 | i_ehdrp->e_ident[EI_MAG0] = ELFMAG0; |
| 1914 | i_ehdrp->e_ident[EI_MAG1] = ELFMAG1; |
| 1915 | i_ehdrp->e_ident[EI_MAG2] = ELFMAG2; |
| 1916 | i_ehdrp->e_ident[EI_MAG3] = ELFMAG3; |
| 1917 | |
| 1918 | i_ehdrp->e_ident[EI_CLASS] = ELFCLASS; |
| 1919 | i_ehdrp->e_ident[EI_DATA] = |
| 1920 | abfd->xvec->byteorder_big_p ? ELFDATA2MSB : ELFDATA2LSB; |
| 1921 | i_ehdrp->e_ident[EI_VERSION] = EV_CURRENT; |
| 1922 | |
| 1923 | for (count = EI_PAD; count < EI_NIDENT; count++) |
| 1924 | i_ehdrp->e_ident[count] = 0; |
| 1925 | |
| 1926 | i_ehdrp->e_type = (abfd->flags & EXEC_P) ? ET_EXEC : ET_REL; |
| 1927 | switch (bfd_get_arch (abfd)) |
| 1928 | { |
| 1929 | case bfd_arch_unknown: |
| 1930 | i_ehdrp->e_machine = EM_NONE; |
| 1931 | break; |
| 1932 | case bfd_arch_sparc: |
| 1933 | i_ehdrp->e_machine = EM_SPARC; |
| 1934 | /* start-sanitize-v9 */ |
| 1935 | #if ARCH_SIZE == 64 |
| 1936 | i_ehdrp->e_machine = EM_SPARC64; |
| 1937 | #endif |
| 1938 | /* end-sanitize-v9 */ |
| 1939 | break; |
| 1940 | case bfd_arch_i386: |
| 1941 | i_ehdrp->e_machine = EM_386; |
| 1942 | break; |
| 1943 | case bfd_arch_m68k: |
| 1944 | i_ehdrp->e_machine = EM_68K; |
| 1945 | break; |
| 1946 | case bfd_arch_m88k: |
| 1947 | i_ehdrp->e_machine = EM_88K; |
| 1948 | break; |
| 1949 | case bfd_arch_i860: |
| 1950 | i_ehdrp->e_machine = EM_860; |
| 1951 | break; |
| 1952 | case bfd_arch_mips: /* MIPS Rxxxx */ |
| 1953 | i_ehdrp->e_machine = EM_MIPS; /* only MIPS R3000 */ |
| 1954 | break; |
| 1955 | case bfd_arch_hppa: |
| 1956 | i_ehdrp->e_machine = EM_HPPA; |
| 1957 | break; |
| 1958 | /* also note that EM_M32, AT&T WE32100 is unknown to bfd */ |
| 1959 | default: |
| 1960 | i_ehdrp->e_machine = EM_NONE; |
| 1961 | } |
| 1962 | i_ehdrp->e_version = EV_CURRENT; |
| 1963 | i_ehdrp->e_ehsize = sizeof (Elf_External_Ehdr); |
| 1964 | |
| 1965 | /* no program header, for now. */ |
| 1966 | i_ehdrp->e_phoff = 0; |
| 1967 | i_ehdrp->e_phentsize = 0; |
| 1968 | i_ehdrp->e_phnum = 0; |
| 1969 | |
| 1970 | /* each bfd section is section header entry */ |
| 1971 | i_ehdrp->e_entry = bfd_get_start_address (abfd); |
| 1972 | i_ehdrp->e_shentsize = sizeof (Elf_External_Shdr); |
| 1973 | |
| 1974 | /* if we're building an executable, we'll need a program header table */ |
| 1975 | if (abfd->flags & EXEC_P) |
| 1976 | { |
| 1977 | /* it all happens later */ |
| 1978 | #if 0 |
| 1979 | i_ehdrp->e_phentsize = sizeof (Elf_External_Phdr); |
| 1980 | |
| 1981 | /* elf_build_phdrs() returns a (NULL-terminated) array of |
| 1982 | Elf_Internal_Phdrs */ |
| 1983 | i_phdrp = elf_build_phdrs (abfd, i_ehdrp, i_shdrp, &i_ehdrp->e_phnum); |
| 1984 | i_ehdrp->e_phoff = outbase; |
| 1985 | outbase += i_ehdrp->e_phentsize * i_ehdrp->e_phnum; |
| 1986 | #endif |
| 1987 | } |
| 1988 | else |
| 1989 | { |
| 1990 | i_ehdrp->e_phentsize = 0; |
| 1991 | i_phdrp = 0; |
| 1992 | i_ehdrp->e_phoff = 0; |
| 1993 | } |
| 1994 | |
| 1995 | elf_tdata (abfd)->symtab_hdr.sh_name = bfd_add_to_strtab (abfd, shstrtab, |
| 1996 | ".symtab"); |
| 1997 | elf_tdata (abfd)->strtab_hdr.sh_name = bfd_add_to_strtab (abfd, shstrtab, |
| 1998 | ".strtab"); |
| 1999 | elf_tdata (abfd)->shstrtab_hdr.sh_name = bfd_add_to_strtab (abfd, shstrtab, |
| 2000 | ".shstrtab"); |
| 2001 | |
| 2002 | } |
| 2003 | |
| 2004 | static void |
| 2005 | swap_out_syms (abfd) |
| 2006 | bfd *abfd; |
| 2007 | { |
| 2008 | struct strtab *shstrtab = elf_shstrtab (abfd); |
| 2009 | |
| 2010 | elf_map_symbols (abfd); |
| 2011 | |
| 2012 | /* Dump out the symtabs. */ |
| 2013 | { |
| 2014 | int symcount = bfd_get_symcount (abfd); |
| 2015 | asymbol **syms = bfd_get_outsymbols (abfd); |
| 2016 | struct strtab *stt = bfd_new_strtab (abfd); |
| 2017 | Elf_Internal_Shdr *symtab_hdr; |
| 2018 | Elf_Internal_Shdr *symstrtab_hdr; |
| 2019 | Elf_External_Sym *outbound_syms; |
| 2020 | int idx; |
| 2021 | |
| 2022 | symtab_hdr = &elf_tdata (abfd)->symtab_hdr; |
| 2023 | symtab_hdr->sh_type = SHT_SYMTAB; |
| 2024 | symtab_hdr->sh_entsize = sizeof (Elf_External_Sym); |
| 2025 | symtab_hdr->sh_size = symtab_hdr->sh_entsize * (symcount + 1); |
| 2026 | symtab_hdr->sh_info = elf_num_locals (abfd) + 1; |
| 2027 | |
| 2028 | /* see assert in elf_fake_sections that supports this: */ |
| 2029 | symstrtab_hdr = &elf_tdata (abfd)->strtab_hdr; |
| 2030 | symstrtab_hdr->sh_type = SHT_STRTAB; |
| 2031 | |
| 2032 | outbound_syms = (Elf_External_Sym *) |
| 2033 | bfd_alloc (abfd, (1 + symcount) * sizeof (Elf_External_Sym)); |
| 2034 | /* now generate the data (for "contents") */ |
| 2035 | { |
| 2036 | /* Fill in zeroth symbol and swap it out. */ |
| 2037 | Elf_Internal_Sym sym; |
| 2038 | sym.st_name = 0; |
| 2039 | sym.st_value = 0; |
| 2040 | sym.st_size = 0; |
| 2041 | sym.st_info = 0; |
| 2042 | sym.st_other = 0; |
| 2043 | sym.st_shndx = SHN_UNDEF; |
| 2044 | elf_swap_symbol_out (abfd, &sym, outbound_syms); |
| 2045 | } |
| 2046 | for (idx = 0; idx < symcount; idx++) |
| 2047 | { |
| 2048 | Elf_Internal_Sym sym; |
| 2049 | bfd_vma value = syms[idx]->value; |
| 2050 | |
| 2051 | if (syms[idx]->flags & BSF_SECTION_SYM) |
| 2052 | /* Section symbols have no names. */ |
| 2053 | sym.st_name = 0; |
| 2054 | else |
| 2055 | sym.st_name = bfd_add_to_strtab (abfd, stt, syms[idx]->name); |
| 2056 | |
| 2057 | if (bfd_is_com_section (syms[idx]->section)) |
| 2058 | { |
| 2059 | /* ELF common symbols put the alignment into the `value' field, |
| 2060 | and the size into the `size' field. This is backwards from |
| 2061 | how BFD handles it, so reverse it here. */ |
| 2062 | sym.st_size = value; |
| 2063 | /* Should retrieve this from somewhere... */ |
| 2064 | sym.st_value = 16; |
| 2065 | sym.st_shndx = SHN_COMMON; |
| 2066 | } |
| 2067 | else |
| 2068 | { |
| 2069 | asection *sec = syms[idx]->section; |
| 2070 | elf_symbol_type *type_ptr; |
| 2071 | int shndx; |
| 2072 | |
| 2073 | if (sec->output_section) |
| 2074 | { |
| 2075 | value += sec->output_offset; |
| 2076 | sec = sec->output_section; |
| 2077 | } |
| 2078 | value += sec->vma; |
| 2079 | sym.st_value = value; |
| 2080 | type_ptr = elf_symbol_from (abfd, syms[idx]); |
| 2081 | sym.st_size = type_ptr ? type_ptr->internal_elf_sym.st_size : 0; |
| 2082 | sym.st_shndx = shndx = elf_section_from_bfd_section (abfd, sec); |
| 2083 | if (shndx == -1) |
| 2084 | { |
| 2085 | asection *sec2; |
| 2086 | /* Writing this would be a hell of a lot easier if we had |
| 2087 | some decent documentation on bfd, and knew what to expect |
| 2088 | of the library, and what to demand of applications. For |
| 2089 | example, it appears that `objcopy' might not set the |
| 2090 | section of a symbol to be a section that is actually in |
| 2091 | the output file. */ |
| 2092 | sec2 = bfd_get_section_by_name (abfd, sec->name); |
| 2093 | assert (sec2 != 0); |
| 2094 | sym.st_shndx = shndx = elf_section_from_bfd_section (abfd, sec2); |
| 2095 | assert (shndx != -1); |
| 2096 | } |
| 2097 | } |
| 2098 | |
| 2099 | if (bfd_is_com_section (syms[idx]->section)) |
| 2100 | sym.st_info = ELF_ST_INFO (STB_GLOBAL, STT_NOTYPE); |
| 2101 | else if (syms[idx]->section == &bfd_und_section) |
| 2102 | sym.st_info = ELF_ST_INFO (STB_GLOBAL, STT_NOTYPE); |
| 2103 | else if (syms[idx]->flags & BSF_SECTION_SYM) |
| 2104 | sym.st_info = ELF_ST_INFO (STB_LOCAL, STT_SECTION); |
| 2105 | else if (syms[idx]->flags & BSF_FILE) |
| 2106 | sym.st_info = ELF_ST_INFO (STB_LOCAL, STT_FILE); |
| 2107 | else |
| 2108 | { |
| 2109 | int bind = STB_LOCAL; |
| 2110 | int type = STT_OBJECT; |
| 2111 | unsigned int flags = syms[idx]->flags; |
| 2112 | |
| 2113 | if (flags & BSF_LOCAL) |
| 2114 | bind = STB_LOCAL; |
| 2115 | else if (flags & BSF_WEAK) |
| 2116 | bind = STB_WEAK; |
| 2117 | else if (flags & BSF_GLOBAL) |
| 2118 | bind = STB_GLOBAL; |
| 2119 | |
| 2120 | if (flags & BSF_FUNCTION) |
| 2121 | type = STT_FUNC; |
| 2122 | |
| 2123 | sym.st_info = ELF_ST_INFO (bind, type); |
| 2124 | } |
| 2125 | |
| 2126 | sym.st_other = 0; |
| 2127 | elf_swap_symbol_out (abfd, &sym, |
| 2128 | (outbound_syms |
| 2129 | + elf_sym_extra (abfd)[idx].elf_sym_num)); |
| 2130 | } |
| 2131 | |
| 2132 | symtab_hdr->contents = (PTR) outbound_syms; |
| 2133 | symstrtab_hdr->contents = (PTR) stt->tab; |
| 2134 | symstrtab_hdr->sh_size = stt->length; |
| 2135 | symstrtab_hdr->sh_type = SHT_STRTAB; |
| 2136 | |
| 2137 | symstrtab_hdr->sh_flags = 0; |
| 2138 | symstrtab_hdr->sh_addr = 0; |
| 2139 | symstrtab_hdr->sh_entsize = 0; |
| 2140 | symstrtab_hdr->sh_link = 0; |
| 2141 | symstrtab_hdr->sh_info = 0; |
| 2142 | symstrtab_hdr->sh_addralign = 0; |
| 2143 | symstrtab_hdr->size = 0; |
| 2144 | } |
| 2145 | |
| 2146 | /* put the strtab out too... */ |
| 2147 | { |
| 2148 | Elf_Internal_Shdr *this_hdr; |
| 2149 | |
| 2150 | this_hdr = &elf_tdata(abfd)->shstrtab_hdr; |
| 2151 | this_hdr->contents = (PTR) elf_shstrtab (abfd)->tab; |
| 2152 | this_hdr->sh_size = elf_shstrtab (abfd)->length; |
| 2153 | this_hdr->sh_type = SHT_STRTAB; |
| 2154 | this_hdr->sh_flags = 0; |
| 2155 | this_hdr->sh_addr = 0; |
| 2156 | this_hdr->sh_entsize = 0; |
| 2157 | this_hdr->sh_addralign = 0; |
| 2158 | this_hdr->size = 0; |
| 2159 | } |
| 2160 | } |
| 2161 | |
| 2162 | static boolean |
| 2163 | write_shdrs_and_ehdr (abfd) |
| 2164 | bfd *abfd; |
| 2165 | { |
| 2166 | Elf_External_Ehdr x_ehdr; /* Elf file header, external form */ |
| 2167 | Elf_Internal_Ehdr *i_ehdrp; /* Elf file header, internal form */ |
| 2168 | Elf_Internal_Phdr *i_phdrp = 0; /* Program header table, internal form */ |
| 2169 | Elf_External_Shdr *x_shdrp; /* Section header table, external form */ |
| 2170 | Elf_Internal_Shdr **i_shdrp; /* Section header table, internal form */ |
| 2171 | |
| 2172 | int count; |
| 2173 | int scnt; |
| 2174 | struct strtab *shstrtab; |
| 2175 | |
| 2176 | i_ehdrp = elf_elfheader (abfd); |
| 2177 | i_shdrp = elf_elfsections (abfd); |
| 2178 | shstrtab = elf_shstrtab (abfd); |
| 2179 | |
| 2180 | /* swap the header before spitting it out... */ |
| 2181 | |
| 2182 | #if DEBUG & 1 |
| 2183 | elf_debug_file (i_ehdrp); |
| 2184 | #endif |
| 2185 | elf_swap_ehdr_out (abfd, i_ehdrp, &x_ehdr); |
| 2186 | bfd_seek (abfd, (file_ptr) 0, SEEK_SET); |
| 2187 | bfd_write ((PTR) & x_ehdr, sizeof (x_ehdr), 1, abfd); |
| 2188 | |
| 2189 | /* at this point we've concocted all the ELF sections... */ |
| 2190 | x_shdrp = (Elf_External_Shdr *) |
| 2191 | bfd_alloc (abfd, sizeof (*x_shdrp) * (i_ehdrp->e_shnum)); |
| 2192 | if (!x_shdrp) |
| 2193 | { |
| 2194 | bfd_error = no_memory; |
| 2195 | return false; |
| 2196 | } |
| 2197 | |
| 2198 | for (count = 0; count < i_ehdrp->e_shnum; count++) |
| 2199 | { |
| 2200 | #if DEBUG & 2 |
| 2201 | elf_debug_section (shstrtab->tab + i_shdrp[count]->sh_name, count, |
| 2202 | i_shdrp[count]); |
| 2203 | #endif |
| 2204 | elf_swap_shdr_out (abfd, i_shdrp[count], x_shdrp + count); |
| 2205 | } |
| 2206 | bfd_seek (abfd, (file_ptr) i_ehdrp->e_shoff, SEEK_SET); |
| 2207 | bfd_write ((PTR) x_shdrp, sizeof (*x_shdrp), i_ehdrp->e_shnum, abfd); |
| 2208 | /* need to dump the string table too... */ |
| 2209 | |
| 2210 | return true; |
| 2211 | } |
| 2212 | |
| 2213 | static void |
| 2214 | assign_file_positions_for_relocs (abfd) |
| 2215 | bfd *abfd; |
| 2216 | { |
| 2217 | file_ptr off = elf_tdata(abfd)->next_file_pos; |
| 2218 | int i; |
| 2219 | Elf_Internal_Shdr **shdrpp = elf_elfsections (abfd); |
| 2220 | Elf_Internal_Shdr *shdrp; |
| 2221 | for (i = 0; i < elf_elfheader(abfd)->e_shnum; i++) |
| 2222 | { |
| 2223 | shdrp = shdrpp[i]; |
| 2224 | if (shdrp->sh_type != SHT_REL && shdrp->sh_type != SHT_RELA) |
| 2225 | continue; |
| 2226 | off = assign_file_position_for_section (shdrp, off); |
| 2227 | } |
| 2228 | elf_tdata(abfd)->next_file_pos = off; |
| 2229 | } |
| 2230 | |
| 2231 | boolean |
| 2232 | DEFUN (NAME(bfd_elf,write_object_contents), (abfd), bfd * abfd) |
| 2233 | { |
| 2234 | Elf_Internal_Ehdr *i_ehdrp; |
| 2235 | Elf_Internal_Shdr **i_shdrp; |
| 2236 | int count; |
| 2237 | |
| 2238 | if (abfd->output_has_begun == false) |
| 2239 | { |
| 2240 | prep_headers (abfd); |
| 2241 | elf_compute_section_file_positions (abfd); |
| 2242 | abfd->output_has_begun = true; |
| 2243 | } |
| 2244 | |
| 2245 | i_shdrp = elf_elfsections (abfd); |
| 2246 | i_ehdrp = elf_elfheader (abfd); |
| 2247 | |
| 2248 | bfd_map_over_sections (abfd, write_relocs, (PTR) 0); |
| 2249 | assign_file_positions_for_relocs (abfd); |
| 2250 | |
| 2251 | /* After writing the headers, we need to write the sections too... */ |
| 2252 | for (count = 0; count < i_ehdrp->e_shnum; count++) |
| 2253 | { |
| 2254 | struct elf_backend_data *bed = get_elf_backend_data (abfd); |
| 2255 | |
| 2256 | if (bed->elf_backend_section_processing) |
| 2257 | (*bed->elf_backend_section_processing) (abfd, i_shdrp[count]); |
| 2258 | if (i_shdrp[count]->contents) |
| 2259 | { |
| 2260 | bfd_seek (abfd, i_shdrp[count]->sh_offset, SEEK_SET); |
| 2261 | bfd_write (i_shdrp[count]->contents, i_shdrp[count]->sh_size, 1, |
| 2262 | abfd); |
| 2263 | } |
| 2264 | } |
| 2265 | return write_shdrs_and_ehdr (abfd); |
| 2266 | } |
| 2267 | |
| 2268 | /* Given an index of a section, retrieve a pointer to it. Note |
| 2269 | that for our purposes, sections are indexed by {1, 2, ...} with |
| 2270 | 0 being an illegal index. */ |
| 2271 | |
| 2272 | /* In the original, each ELF section went into exactly one BFD |
| 2273 | section. This doesn't really make sense, so we need a real mapping. |
| 2274 | The mapping has to hide in the Elf_Internal_Shdr since asection |
| 2275 | doesn't have anything like a tdata field... */ |
| 2276 | |
| 2277 | static struct sec * |
| 2278 | DEFUN (section_from_elf_index, (abfd, index), |
| 2279 | bfd * abfd AND |
| 2280 | int index) |
| 2281 | { |
| 2282 | /* @@ Is bfd_com_section really correct in all the places it could |
| 2283 | be returned from this routine? */ |
| 2284 | |
| 2285 | if (index == SHN_ABS) |
| 2286 | return &bfd_com_section; /* not abs? */ |
| 2287 | if (index == SHN_COMMON) |
| 2288 | return &bfd_com_section; |
| 2289 | |
| 2290 | if (index > elf_elfheader (abfd)->e_shnum) |
| 2291 | return 0; |
| 2292 | |
| 2293 | { |
| 2294 | Elf_Internal_Shdr *hdr = elf_elfsections (abfd)[index]; |
| 2295 | |
| 2296 | switch (hdr->sh_type) |
| 2297 | { |
| 2298 | /* ELF sections that map to BFD sections */ |
| 2299 | case SHT_PROGBITS: |
| 2300 | case SHT_NOBITS: |
| 2301 | if (!hdr->rawdata) |
| 2302 | bfd_section_from_shdr (abfd, index); |
| 2303 | return (struct sec *) hdr->rawdata; |
| 2304 | |
| 2305 | default: |
| 2306 | return (struct sec *) &bfd_abs_section; |
| 2307 | } |
| 2308 | } |
| 2309 | } |
| 2310 | |
| 2311 | /* given a section, search the header to find them... */ |
| 2312 | static int |
| 2313 | DEFUN (elf_section_from_bfd_section, (abfd, asect), |
| 2314 | bfd * abfd AND |
| 2315 | struct sec *asect) |
| 2316 | { |
| 2317 | Elf_Internal_Shdr **i_shdrp = elf_elfsections (abfd); |
| 2318 | int index; |
| 2319 | Elf_Internal_Shdr *hdr; |
| 2320 | int maxindex = elf_elfheader (abfd)->e_shnum; |
| 2321 | |
| 2322 | if (asect == &bfd_abs_section) |
| 2323 | return SHN_ABS; |
| 2324 | if (asect == &bfd_com_section) |
| 2325 | return SHN_COMMON; |
| 2326 | if (asect == &bfd_und_section) |
| 2327 | return SHN_UNDEF; |
| 2328 | |
| 2329 | for (index = 0; index < maxindex; index++) |
| 2330 | { |
| 2331 | hdr = i_shdrp[index]; |
| 2332 | switch (hdr->sh_type) |
| 2333 | { |
| 2334 | /* ELF sections that map to BFD sections */ |
| 2335 | case SHT_PROGBITS: |
| 2336 | case SHT_NOBITS: |
| 2337 | case SHT_NOTE: |
| 2338 | if (hdr->rawdata) |
| 2339 | { |
| 2340 | if (((struct sec *) (hdr->rawdata)) == asect) |
| 2341 | return index; |
| 2342 | } |
| 2343 | break; |
| 2344 | default: |
| 2345 | { |
| 2346 | struct elf_backend_data *bed = get_elf_backend_data (abfd); |
| 2347 | |
| 2348 | if (bed->elf_backend_section_from_bfd_section) |
| 2349 | if ((*bed->elf_backend_section_from_bfd_section) (abfd, hdr, asect)) |
| 2350 | return index; |
| 2351 | } |
| 2352 | break; |
| 2353 | } |
| 2354 | } |
| 2355 | return -1; |
| 2356 | } |
| 2357 | |
| 2358 | /* given a symbol, return the bfd index for that symbol. */ |
| 2359 | static int |
| 2360 | DEFUN (elf_symbol_from_bfd_symbol, (abfd, asym_ptr_ptr), |
| 2361 | bfd * abfd AND |
| 2362 | struct symbol_cache_entry **asym_ptr_ptr) |
| 2363 | { |
| 2364 | struct symbol_cache_entry *asym_ptr = *asym_ptr_ptr; |
| 2365 | CONST char *name = asym_ptr->name; |
| 2366 | int idx; |
| 2367 | int symcount = bfd_get_symcount (abfd); |
| 2368 | flagword flags = asym_ptr->flags; |
| 2369 | asymbol **syms = bfd_get_outsymbols (abfd); |
| 2370 | |
| 2371 | /* When gas creates relocations against local labels, it creates its |
| 2372 | own symbol for the section, but does put the symbol into the |
| 2373 | symbol chain, so udata is 0. When the linker is generating |
| 2374 | relocatable output, this section symbol may be for one of the |
| 2375 | input sections rather than the output section. */ |
| 2376 | if (asym_ptr->udata == (PTR) 0 |
| 2377 | && (flags & BSF_SECTION_SYM) |
| 2378 | && asym_ptr->section) |
| 2379 | { |
| 2380 | int indx; |
| 2381 | |
| 2382 | if (asym_ptr->section->output_section != NULL) |
| 2383 | indx = asym_ptr->section->output_section->index; |
| 2384 | else |
| 2385 | indx = asym_ptr->section->index; |
| 2386 | if (elf_section_syms (abfd)[indx]) |
| 2387 | asym_ptr->udata = elf_section_syms (abfd)[indx]->udata; |
| 2388 | } |
| 2389 | |
| 2390 | if (asym_ptr->udata) |
| 2391 | idx = ((Elf_Sym_Extra *)asym_ptr->udata)->elf_sym_num; |
| 2392 | else |
| 2393 | { |
| 2394 | abort (); |
| 2395 | } |
| 2396 | |
| 2397 | #if DEBUG & 4 |
| 2398 | { |
| 2399 | |
| 2400 | fprintf (stderr, |
| 2401 | "elf_symbol_from_bfd_symbol 0x%.8lx, name = %s, sym num = %d, flags = 0x%.8lx %s\n", |
| 2402 | (long) asym_ptr, asym_ptr->name, idx, flags, elf_symbol_flags (flags)); |
| 2403 | fflush (stderr); |
| 2404 | } |
| 2405 | #endif |
| 2406 | |
| 2407 | return idx; |
| 2408 | } |
| 2409 | |
| 2410 | static boolean |
| 2411 | DEFUN (elf_slurp_symbol_table, (abfd, symptrs), |
| 2412 | bfd * abfd AND |
| 2413 | asymbol ** symptrs) /* Buffer for generated bfd symbols */ |
| 2414 | { |
| 2415 | Elf_Internal_Shdr *hdr = &elf_tdata(abfd)->symtab_hdr; |
| 2416 | int symcount; /* Number of external ELF symbols */ |
| 2417 | int i; |
| 2418 | elf_symbol_type *sym; /* Pointer to current bfd symbol */ |
| 2419 | elf_symbol_type *symbase; /* Buffer for generated bfd symbols */ |
| 2420 | Elf_Internal_Sym i_sym; |
| 2421 | Elf_External_Sym *x_symp; |
| 2422 | |
| 2423 | /* this is only valid because there is only one symtab... */ |
| 2424 | /* FIXME: This is incorrect, there may also be a dynamic symbol |
| 2425 | table which is a subset of the full symbol table. We either need |
| 2426 | to be prepared to read both (and merge them) or ensure that we |
| 2427 | only read the full symbol table. Currently we only get called to |
| 2428 | read the full symbol table. -fnf */ |
| 2429 | if (bfd_get_outsymbols (abfd) != NULL) |
| 2430 | { |
| 2431 | return true; |
| 2432 | } |
| 2433 | |
| 2434 | /* Read each raw ELF symbol, converting from external ELF form to |
| 2435 | internal ELF form, and then using the information to create a |
| 2436 | canonical bfd symbol table entry. |
| 2437 | |
| 2438 | Note that we allocate the initial bfd canonical symbol buffer |
| 2439 | based on a one-to-one mapping of the ELF symbols to canonical |
| 2440 | symbols. We actually use all the ELF symbols, so there will be no |
| 2441 | space left over at the end. When we have all the symbols, we |
| 2442 | build the caller's pointer vector. */ |
| 2443 | |
| 2444 | if (bfd_seek (abfd, hdr->sh_offset, SEEK_SET) == -1) |
| 2445 | { |
| 2446 | bfd_error = system_call_error; |
| 2447 | return false; |
| 2448 | } |
| 2449 | |
| 2450 | symcount = hdr->sh_size / sizeof (Elf_External_Sym); |
| 2451 | symbase = (elf_symbol_type *) bfd_zalloc (abfd, symcount * sizeof (elf_symbol_type)); |
| 2452 | sym = symbase; |
| 2453 | |
| 2454 | /* Temporarily allocate room for the raw ELF symbols. */ |
| 2455 | x_symp = (Elf_External_Sym *) bfd_xmalloc (symcount * sizeof (Elf_External_Sym)); |
| 2456 | |
| 2457 | if (bfd_read ((PTR) x_symp, sizeof (Elf_External_Sym), symcount, abfd) |
| 2458 | != symcount * sizeof (Elf_External_Sym)) |
| 2459 | { |
| 2460 | free ((PTR) x_symp); |
| 2461 | bfd_error = system_call_error; |
| 2462 | return false; |
| 2463 | } |
| 2464 | /* Skip first symbol, which is a null dummy. */ |
| 2465 | for (i = 1; i < symcount; i++) |
| 2466 | { |
| 2467 | elf_swap_symbol_in (abfd, x_symp + i, &i_sym); |
| 2468 | memcpy (&sym->internal_elf_sym, &i_sym, sizeof (Elf_Internal_Sym)); |
| 2469 | #ifdef ELF_KEEP_EXTSYM |
| 2470 | memcpy (&sym->native_elf_sym, x_symp + i, sizeof (Elf_External_Sym)); |
| 2471 | #endif |
| 2472 | sym->symbol.the_bfd = abfd; |
| 2473 | |
| 2474 | sym->symbol.name = elf_string_from_elf_section (abfd, hdr->sh_link, |
| 2475 | i_sym.st_name); |
| 2476 | |
| 2477 | sym->symbol.value = i_sym.st_value; |
| 2478 | |
| 2479 | if (i_sym.st_shndx > 0 && i_sym.st_shndx < SHN_LORESERV) |
| 2480 | { |
| 2481 | sym->symbol.section = section_from_elf_index (abfd, i_sym.st_shndx); |
| 2482 | } |
| 2483 | else if (i_sym.st_shndx == SHN_ABS) |
| 2484 | { |
| 2485 | sym->symbol.section = &bfd_abs_section; |
| 2486 | } |
| 2487 | else if (i_sym.st_shndx == SHN_COMMON) |
| 2488 | { |
| 2489 | sym->symbol.section = &bfd_com_section; |
| 2490 | /* Elf puts the alignment into the `value' field, and the size |
| 2491 | into the `size' field. BFD wants to see the size in the |
| 2492 | value field, and doesn't care (at the moment) about the |
| 2493 | alignment. */ |
| 2494 | sym->symbol.value = i_sym.st_size; |
| 2495 | } |
| 2496 | else if (i_sym.st_shndx == SHN_UNDEF) |
| 2497 | { |
| 2498 | sym->symbol.section = &bfd_und_section; |
| 2499 | } |
| 2500 | else |
| 2501 | sym->symbol.section = &bfd_abs_section; |
| 2502 | |
| 2503 | sym->symbol.value -= sym->symbol.section->vma; |
| 2504 | |
| 2505 | switch (ELF_ST_BIND (i_sym.st_info)) |
| 2506 | { |
| 2507 | case STB_LOCAL: |
| 2508 | sym->symbol.flags |= BSF_LOCAL; |
| 2509 | break; |
| 2510 | case STB_GLOBAL: |
| 2511 | sym->symbol.flags |= BSF_GLOBAL; |
| 2512 | break; |
| 2513 | case STB_WEAK: |
| 2514 | sym->symbol.flags |= BSF_WEAK; |
| 2515 | break; |
| 2516 | } |
| 2517 | |
| 2518 | switch (ELF_ST_TYPE (i_sym.st_info)) |
| 2519 | { |
| 2520 | case STT_SECTION: |
| 2521 | sym->symbol.flags |= BSF_SECTION_SYM | BSF_DEBUGGING; |
| 2522 | break; |
| 2523 | case STT_FILE: |
| 2524 | sym->symbol.flags |= BSF_FILE | BSF_DEBUGGING; |
| 2525 | break; |
| 2526 | case STT_FUNC: |
| 2527 | sym->symbol.flags |= BSF_FUNCTION; |
| 2528 | break; |
| 2529 | } |
| 2530 | |
| 2531 | /* Do some backend-specific processing on this symbol. */ |
| 2532 | { |
| 2533 | struct elf_backend_data *ebd = get_elf_backend_data (abfd); |
| 2534 | if (ebd->elf_backend_symbol_processing) |
| 2535 | (*ebd->elf_backend_symbol_processing) (abfd, &sym->symbol); |
| 2536 | } |
| 2537 | |
| 2538 | sym++; |
| 2539 | } |
| 2540 | |
| 2541 | /* Do some backend-specific processing on this symbol table. */ |
| 2542 | { |
| 2543 | struct elf_backend_data *ebd = get_elf_backend_data (abfd); |
| 2544 | if (ebd->elf_backend_symbol_table_processing) |
| 2545 | (*ebd->elf_backend_symbol_table_processing) (abfd, symbase, symcount); |
| 2546 | } |
| 2547 | |
| 2548 | /* We rely on the zalloc to clear out the final symbol entry. */ |
| 2549 | |
| 2550 | bfd_get_symcount (abfd) = symcount = sym - symbase; |
| 2551 | |
| 2552 | /* Fill in the user's symbol pointer vector if needed. */ |
| 2553 | if (symptrs) |
| 2554 | { |
| 2555 | sym = symbase; |
| 2556 | while (symcount-- > 0) |
| 2557 | { |
| 2558 | *symptrs++ = &sym->symbol; |
| 2559 | sym++; |
| 2560 | } |
| 2561 | *symptrs = 0; /* Final null pointer */ |
| 2562 | } |
| 2563 | |
| 2564 | return true; |
| 2565 | } |
| 2566 | |
| 2567 | /* Return the number of bytes required to hold the symtab vector. |
| 2568 | |
| 2569 | Note that we base it on the count plus 1, since we will null terminate |
| 2570 | the vector allocated based on this size. However, the ELF symbol table |
| 2571 | always has a dummy entry as symbol #0, so it ends up even. */ |
| 2572 | |
| 2573 | unsigned int |
| 2574 | DEFUN (elf_get_symtab_upper_bound, (abfd), bfd * abfd) |
| 2575 | { |
| 2576 | unsigned int symcount; |
| 2577 | unsigned int symtab_size = 0; |
| 2578 | |
| 2579 | Elf_Internal_Shdr *hdr = &elf_tdata(abfd)->symtab_hdr; |
| 2580 | symcount = hdr->sh_size / sizeof (Elf_External_Sym); |
| 2581 | symtab_size = (symcount - 1 + 1) * (sizeof (asymbol)); |
| 2582 | |
| 2583 | return symtab_size; |
| 2584 | } |
| 2585 | |
| 2586 | /* |
| 2587 | This function return the number of bytes required to store the |
| 2588 | relocation information associated with section <<sect>> |
| 2589 | attached to bfd <<abfd>> |
| 2590 | |
| 2591 | */ |
| 2592 | unsigned int |
| 2593 | elf_get_reloc_upper_bound (abfd, asect) |
| 2594 | bfd *abfd; |
| 2595 | sec_ptr asect; |
| 2596 | { |
| 2597 | if (asect->flags & SEC_RELOC) |
| 2598 | { |
| 2599 | /* either rel or rela */ |
| 2600 | return elf_section_data(asect)->rel_hdr.sh_size; |
| 2601 | } |
| 2602 | else |
| 2603 | return 0; |
| 2604 | } |
| 2605 | |
| 2606 | static boolean |
| 2607 | DEFUN (elf_slurp_reloca_table, (abfd, asect, symbols), |
| 2608 | bfd * abfd AND |
| 2609 | sec_ptr asect AND |
| 2610 | asymbol ** symbols) |
| 2611 | { |
| 2612 | Elf_External_Rela *native_relocs; |
| 2613 | arelent *reloc_cache; |
| 2614 | arelent *cache_ptr; |
| 2615 | |
| 2616 | unsigned int idx; |
| 2617 | |
| 2618 | if (asect->relocation) |
| 2619 | return true; |
| 2620 | if (asect->reloc_count == 0) |
| 2621 | return true; |
| 2622 | if (asect->flags & SEC_CONSTRUCTOR) |
| 2623 | return true; |
| 2624 | |
| 2625 | bfd_seek (abfd, asect->rel_filepos, SEEK_SET); |
| 2626 | native_relocs = (Elf_External_Rela *) |
| 2627 | bfd_alloc (abfd, asect->reloc_count * sizeof (Elf_External_Rela)); |
| 2628 | bfd_read ((PTR) native_relocs, |
| 2629 | sizeof (Elf_External_Rela), asect->reloc_count, abfd); |
| 2630 | |
| 2631 | reloc_cache = (arelent *) |
| 2632 | bfd_alloc (abfd, (size_t) (asect->reloc_count * sizeof (arelent))); |
| 2633 | |
| 2634 | if (!reloc_cache) |
| 2635 | { |
| 2636 | bfd_error = no_memory; |
| 2637 | return false; |
| 2638 | } |
| 2639 | |
| 2640 | for (idx = 0; idx < asect->reloc_count; idx++) |
| 2641 | { |
| 2642 | Elf_Internal_Rela dst; |
| 2643 | Elf_External_Rela *src; |
| 2644 | |
| 2645 | cache_ptr = reloc_cache + idx; |
| 2646 | src = native_relocs + idx; |
| 2647 | elf_swap_reloca_in (abfd, src, &dst); |
| 2648 | |
| 2649 | #ifdef RELOC_PROCESSING |
| 2650 | RELOC_PROCESSING (cache_ptr, &dst, symbols, abfd, asect); |
| 2651 | #else |
| 2652 | if (asect->flags & SEC_RELOC) |
| 2653 | { |
| 2654 | /* relocatable, so the offset is off of the section */ |
| 2655 | cache_ptr->address = dst.r_offset + asect->vma; |
| 2656 | } |
| 2657 | else |
| 2658 | { |
| 2659 | /* non-relocatable, so the offset a virtual address */ |
| 2660 | cache_ptr->address = dst.r_offset; |
| 2661 | } |
| 2662 | /* ELF_R_SYM(dst.r_info) is the symbol table offset; subtract 1 |
| 2663 | because the first entry is NULL. */ |
| 2664 | cache_ptr->sym_ptr_ptr = symbols + ELF_R_SYM (dst.r_info) - 1; |
| 2665 | { |
| 2666 | /* Is it an ELF section symbol? If so, translate it into a |
| 2667 | BFD section symbol. */ |
| 2668 | asymbol *s = *(cache_ptr->sym_ptr_ptr); |
| 2669 | if (s->flags & BSF_SECTION_SYM) |
| 2670 | { |
| 2671 | cache_ptr->sym_ptr_ptr = s->section->symbol_ptr_ptr; |
| 2672 | s = *cache_ptr->sym_ptr_ptr; |
| 2673 | if (s->name == 0 || s->name[0] == 0) |
| 2674 | abort (); |
| 2675 | } |
| 2676 | } |
| 2677 | cache_ptr->addend = dst.r_addend; |
| 2678 | |
| 2679 | /* Fill in the cache_ptr->howto field from dst.r_type */ |
| 2680 | { |
| 2681 | struct elf_backend_data *ebd = get_elf_backend_data (abfd); |
| 2682 | (*ebd->elf_info_to_howto) (abfd, cache_ptr, &dst); |
| 2683 | } |
| 2684 | #endif |
| 2685 | } |
| 2686 | |
| 2687 | asect->relocation = reloc_cache; |
| 2688 | return true; |
| 2689 | } |
| 2690 | |
| 2691 | #ifdef DEBUG |
| 2692 | static void |
| 2693 | elf_debug_section (str, num, hdr) |
| 2694 | char *str; |
| 2695 | int num; |
| 2696 | Elf_Internal_Shdr *hdr; |
| 2697 | { |
| 2698 | fprintf (stderr, "\nSection#%d '%s' 0x%.8lx\n", num, str, (long) hdr); |
| 2699 | fprintf (stderr, |
| 2700 | "sh_name = %ld\tsh_type = %ld\tsh_flags = %ld\n", |
| 2701 | (long) hdr->sh_name, |
| 2702 | (long) hdr->sh_type, |
| 2703 | (long) hdr->sh_flags); |
| 2704 | fprintf (stderr, |
| 2705 | "sh_addr = %ld\tsh_offset = %ld\tsh_size = %ld\n", |
| 2706 | (long) hdr->sh_addr, |
| 2707 | (long) hdr->sh_offset, |
| 2708 | (long) hdr->sh_size); |
| 2709 | fprintf (stderr, |
| 2710 | "sh_link = %ld\tsh_info = %ld\tsh_addralign = %ld\n", |
| 2711 | (long) hdr->sh_link, |
| 2712 | (long) hdr->sh_info, |
| 2713 | (long) hdr->sh_addralign); |
| 2714 | fprintf (stderr, "sh_entsize = %ld\n", |
| 2715 | (long) hdr->sh_entsize); |
| 2716 | fprintf (stderr, "rawdata = 0x%.8lx\n", (long) hdr->rawdata); |
| 2717 | fprintf (stderr, "contents = 0x%.8lx\n", (long) hdr->contents); |
| 2718 | fprintf (stderr, "size = %ld\n", (long) hdr->size); |
| 2719 | fflush (stderr); |
| 2720 | } |
| 2721 | |
| 2722 | static void |
| 2723 | elf_debug_file (ehdrp) |
| 2724 | Elf_Internal_Ehdr *ehdrp; |
| 2725 | { |
| 2726 | fprintf (stderr, "e_entry = 0x%.8lx\n", (long) ehdrp->e_entry); |
| 2727 | fprintf (stderr, "e_phoff = %ld\n", (long) ehdrp->e_phoff); |
| 2728 | fprintf (stderr, "e_phnum = %ld\n", (long) ehdrp->e_phnum); |
| 2729 | fprintf (stderr, "e_phentsize = %ld\n", (long) ehdrp->e_phentsize); |
| 2730 | fprintf (stderr, "e_shoff = %ld\n", (long) ehdrp->e_shoff); |
| 2731 | fprintf (stderr, "e_shnum = %ld\n", (long) ehdrp->e_shnum); |
| 2732 | fprintf (stderr, "e_shentsize = %ld\n", (long) ehdrp->e_shentsize); |
| 2733 | } |
| 2734 | #endif |
| 2735 | |
| 2736 | static boolean |
| 2737 | DEFUN (elf_slurp_reloc_table, (abfd, asect, symbols), |
| 2738 | bfd * abfd AND |
| 2739 | sec_ptr asect AND |
| 2740 | asymbol ** symbols) |
| 2741 | { |
| 2742 | Elf_External_Rel *native_relocs; |
| 2743 | arelent *reloc_cache; |
| 2744 | arelent *cache_ptr; |
| 2745 | Elf_Internal_Shdr *data_hdr; |
| 2746 | ElfNAME (Off) data_off; |
| 2747 | ElfNAME (Word) data_max; |
| 2748 | char buf[4]; /* FIXME -- might be elf64 */ |
| 2749 | |
| 2750 | unsigned int idx; |
| 2751 | |
| 2752 | if (asect->relocation) |
| 2753 | return true; |
| 2754 | if (asect->reloc_count == 0) |
| 2755 | return true; |
| 2756 | if (asect->flags & SEC_CONSTRUCTOR) |
| 2757 | return true; |
| 2758 | |
| 2759 | bfd_seek (abfd, asect->rel_filepos, SEEK_SET); |
| 2760 | native_relocs = (Elf_External_Rel *) |
| 2761 | bfd_alloc (abfd, asect->reloc_count * sizeof (Elf_External_Rel)); |
| 2762 | bfd_read ((PTR) native_relocs, |
| 2763 | sizeof (Elf_External_Rel), asect->reloc_count, abfd); |
| 2764 | |
| 2765 | reloc_cache = (arelent *) |
| 2766 | bfd_alloc (abfd, (size_t) (asect->reloc_count * sizeof (arelent))); |
| 2767 | |
| 2768 | if (!reloc_cache) |
| 2769 | { |
| 2770 | bfd_error = no_memory; |
| 2771 | return false; |
| 2772 | } |
| 2773 | |
| 2774 | /* Get the offset of the start of the segment we are relocating to read in |
| 2775 | the implicit addend. */ |
| 2776 | data_hdr = &elf_section_data(asect)->this_hdr; |
| 2777 | data_off = data_hdr->sh_offset; |
| 2778 | data_max = data_hdr->sh_size - sizeof (buf) + 1; |
| 2779 | |
| 2780 | #if DEBUG & 2 |
| 2781 | elf_debug_section ("data section", -1, data_hdr); |
| 2782 | #endif |
| 2783 | |
| 2784 | for (idx = 0; idx < asect->reloc_count; idx++) |
| 2785 | { |
| 2786 | #ifdef RELOC_PROCESSING |
| 2787 | Elf_Internal_Rel dst; |
| 2788 | Elf_External_Rel *src; |
| 2789 | |
| 2790 | cache_ptr = reloc_cache + idx; |
| 2791 | src = native_relocs + idx; |
| 2792 | elf_swap_reloc_in (abfd, src, &dst); |
| 2793 | |
| 2794 | RELOC_PROCESSING (cache_ptr, &dst, symbols, abfd, asect); |
| 2795 | #else |
| 2796 | Elf_Internal_Rel dst; |
| 2797 | Elf_External_Rel *src; |
| 2798 | |
| 2799 | cache_ptr = reloc_cache + idx; |
| 2800 | src = native_relocs + idx; |
| 2801 | |
| 2802 | elf_swap_reloc_in (abfd, src, &dst); |
| 2803 | |
| 2804 | if (asect->flags & SEC_RELOC) |
| 2805 | { |
| 2806 | /* relocatable, so the offset is off of the section */ |
| 2807 | cache_ptr->address = dst.r_offset + asect->vma; |
| 2808 | } |
| 2809 | else |
| 2810 | { |
| 2811 | /* non-relocatable, so the offset a virtual address */ |
| 2812 | cache_ptr->address = dst.r_offset; |
| 2813 | } |
| 2814 | /* ELF_R_SYM(dst.r_info) is the symbol table offset... |
| 2815 | -1 is to skip the dummy symbol table entry */ |
| 2816 | cache_ptr->sym_ptr_ptr = symbols + ELF_R_SYM (dst.r_info) - 1; |
| 2817 | { |
| 2818 | /* Is it an ELF section symbol? If so, translate it into a |
| 2819 | BFD section symbol. */ |
| 2820 | asymbol *s = *(cache_ptr->sym_ptr_ptr); |
| 2821 | if (s->flags & BSF_SECTION_SYM) |
| 2822 | { |
| 2823 | cache_ptr->sym_ptr_ptr = s->section->symbol_ptr_ptr; |
| 2824 | s = *cache_ptr->sym_ptr_ptr; |
| 2825 | if (s->name == 0 || s->name[0] == 0) |
| 2826 | abort (); |
| 2827 | } |
| 2828 | } |
| 2829 | BFD_ASSERT (dst.r_offset <= data_max); |
| 2830 | cache_ptr->addend = 0; |
| 2831 | |
| 2832 | /* Fill in the cache_ptr->howto field from dst.r_type */ |
| 2833 | { |
| 2834 | struct elf_backend_data *ebd = get_elf_backend_data (abfd); |
| 2835 | (*ebd->elf_info_to_howto_rel) (abfd, cache_ptr, &dst); |
| 2836 | } |
| 2837 | #endif |
| 2838 | } |
| 2839 | |
| 2840 | asect->relocation = reloc_cache; |
| 2841 | return true; |
| 2842 | } |
| 2843 | |
| 2844 | unsigned int |
| 2845 | elf_canonicalize_reloc (abfd, section, relptr, symbols) |
| 2846 | bfd *abfd; |
| 2847 | sec_ptr section; |
| 2848 | arelent **relptr; |
| 2849 | asymbol **symbols; |
| 2850 | { |
| 2851 | arelent *tblptr = section->relocation; |
| 2852 | unsigned int count = 0; |
| 2853 | int use_rela_p = get_elf_backend_data (abfd)->use_rela_p; |
| 2854 | |
| 2855 | /* snarfed from coffcode.h */ |
| 2856 | if (use_rela_p) |
| 2857 | elf_slurp_reloca_table (abfd, section, symbols); |
| 2858 | else |
| 2859 | elf_slurp_reloc_table (abfd, section, symbols); |
| 2860 | |
| 2861 | tblptr = section->relocation; |
| 2862 | if (!tblptr) |
| 2863 | return 0; |
| 2864 | |
| 2865 | for (; count++ < section->reloc_count;) |
| 2866 | *relptr++ = tblptr++; |
| 2867 | |
| 2868 | *relptr = 0; |
| 2869 | return section->reloc_count; |
| 2870 | } |
| 2871 | |
| 2872 | unsigned int |
| 2873 | DEFUN (elf_get_symtab, (abfd, alocation), |
| 2874 | bfd * abfd AND |
| 2875 | asymbol ** alocation) |
| 2876 | { |
| 2877 | |
| 2878 | if (!elf_slurp_symbol_table (abfd, alocation)) |
| 2879 | return 0; |
| 2880 | else |
| 2881 | return bfd_get_symcount (abfd); |
| 2882 | } |
| 2883 | |
| 2884 | asymbol * |
| 2885 | DEFUN (elf_make_empty_symbol, (abfd), |
| 2886 | bfd * abfd) |
| 2887 | { |
| 2888 | elf_symbol_type *newsym; |
| 2889 | |
| 2890 | newsym = (elf_symbol_type *) bfd_zalloc (abfd, sizeof (elf_symbol_type)); |
| 2891 | if (!newsym) |
| 2892 | { |
| 2893 | bfd_error = no_memory; |
| 2894 | return NULL; |
| 2895 | } |
| 2896 | else |
| 2897 | { |
| 2898 | newsym->symbol.the_bfd = abfd; |
| 2899 | return &newsym->symbol; |
| 2900 | } |
| 2901 | } |
| 2902 | |
| 2903 | void |
| 2904 | DEFUN (elf_get_symbol_info, (ignore_abfd, symbol, ret), |
| 2905 | bfd * ignore_abfd AND |
| 2906 | asymbol * symbol AND |
| 2907 | symbol_info * ret) |
| 2908 | { |
| 2909 | bfd_symbol_info (symbol, ret); |
| 2910 | } |
| 2911 | |
| 2912 | void |
| 2913 | DEFUN (elf_print_symbol, (ignore_abfd, filep, symbol, how), |
| 2914 | bfd * ignore_abfd AND |
| 2915 | PTR filep AND |
| 2916 | asymbol * symbol AND |
| 2917 | bfd_print_symbol_type how) |
| 2918 | { |
| 2919 | FILE *file = (FILE *) filep; |
| 2920 | switch (how) |
| 2921 | { |
| 2922 | case bfd_print_symbol_name: |
| 2923 | fprintf (file, "%s", symbol->name); |
| 2924 | break; |
| 2925 | case bfd_print_symbol_more: |
| 2926 | fprintf (file, "elf "); |
| 2927 | fprintf_vma (file, symbol->value); |
| 2928 | fprintf (file, " %lx", (long) symbol->flags); |
| 2929 | break; |
| 2930 | case bfd_print_symbol_all: |
| 2931 | { |
| 2932 | CONST char *section_name; |
| 2933 | section_name = symbol->section ? symbol->section->name : "(*none*)"; |
| 2934 | bfd_print_symbol_vandf ((PTR) file, symbol); |
| 2935 | fprintf (file, " %s\t%s", |
| 2936 | section_name, |
| 2937 | symbol->name); |
| 2938 | } |
| 2939 | break; |
| 2940 | } |
| 2941 | |
| 2942 | } |
| 2943 | |
| 2944 | alent * |
| 2945 | DEFUN (elf_get_lineno, (ignore_abfd, symbol), |
| 2946 | bfd * ignore_abfd AND |
| 2947 | asymbol * symbol) |
| 2948 | { |
| 2949 | fprintf (stderr, "elf_get_lineno unimplemented\n"); |
| 2950 | fflush (stderr); |
| 2951 | BFD_FAIL (); |
| 2952 | return NULL; |
| 2953 | } |
| 2954 | |
| 2955 | boolean |
| 2956 | DEFUN (elf_set_arch_mach, (abfd, arch, machine), |
| 2957 | bfd * abfd AND |
| 2958 | enum bfd_architecture arch AND |
| 2959 | unsigned long machine) |
| 2960 | { |
| 2961 | /* Allow any architecture to be supported by the elf backend */ |
| 2962 | switch (arch) |
| 2963 | { |
| 2964 | case bfd_arch_unknown: /* EM_NONE */ |
| 2965 | case bfd_arch_sparc: /* EM_SPARC */ |
| 2966 | case bfd_arch_i386: /* EM_386 */ |
| 2967 | case bfd_arch_m68k: /* EM_68K */ |
| 2968 | case bfd_arch_m88k: /* EM_88K */ |
| 2969 | case bfd_arch_i860: /* EM_860 */ |
| 2970 | case bfd_arch_mips: /* EM_MIPS (MIPS R3000) */ |
| 2971 | case bfd_arch_hppa: /* EM_HPPA (HP PA_RISC) */ |
| 2972 | return bfd_default_set_arch_mach (abfd, arch, machine); |
| 2973 | default: |
| 2974 | return false; |
| 2975 | } |
| 2976 | } |
| 2977 | |
| 2978 | boolean |
| 2979 | DEFUN (elf_find_nearest_line, (abfd, |
| 2980 | section, |
| 2981 | symbols, |
| 2982 | offset, |
| 2983 | filename_ptr, |
| 2984 | functionname_ptr, |
| 2985 | line_ptr), |
| 2986 | bfd * abfd AND |
| 2987 | asection * section AND |
| 2988 | asymbol ** symbols AND |
| 2989 | bfd_vma offset AND |
| 2990 | CONST char **filename_ptr AND |
| 2991 | CONST char **functionname_ptr AND |
| 2992 | unsigned int *line_ptr) |
| 2993 | { |
| 2994 | return false; |
| 2995 | } |
| 2996 | |
| 2997 | int |
| 2998 | DEFUN (elf_sizeof_headers, (abfd, reloc), |
| 2999 | bfd * abfd AND |
| 3000 | boolean reloc) |
| 3001 | { |
| 3002 | fprintf (stderr, "elf_sizeof_headers unimplemented\n"); |
| 3003 | fflush (stderr); |
| 3004 | BFD_FAIL (); |
| 3005 | return 0; |
| 3006 | } |
| 3007 | |
| 3008 | boolean |
| 3009 | DEFUN (elf_set_section_contents, (abfd, section, location, offset, count), |
| 3010 | bfd * abfd AND |
| 3011 | sec_ptr section AND |
| 3012 | PTR location AND |
| 3013 | file_ptr offset AND |
| 3014 | bfd_size_type count) |
| 3015 | { |
| 3016 | Elf_Internal_Shdr *hdr; |
| 3017 | |
| 3018 | if (abfd->output_has_begun == false) /* set by bfd.c handler? */ |
| 3019 | { |
| 3020 | /* do setup calculations (FIXME) */ |
| 3021 | prep_headers (abfd); |
| 3022 | elf_compute_section_file_positions (abfd); |
| 3023 | abfd->output_has_begun = true; |
| 3024 | } |
| 3025 | |
| 3026 | hdr = &elf_section_data(section)->this_hdr; |
| 3027 | |
| 3028 | if (bfd_seek (abfd, hdr->sh_offset + offset, SEEK_SET) == -1) |
| 3029 | return false; |
| 3030 | if (bfd_write (location, 1, count, abfd) != count) |
| 3031 | return false; |
| 3032 | |
| 3033 | return true; |
| 3034 | } |
| 3035 | |
| 3036 | void |
| 3037 | DEFUN (elf_no_info_to_howto, (abfd, cache_ptr, dst), |
| 3038 | bfd * abfd AND |
| 3039 | arelent * cache_ptr AND |
| 3040 | Elf_Internal_Rela * dst) |
| 3041 | { |
| 3042 | fprintf (stderr, "elf RELA relocation support for target machine unimplemented\n"); |
| 3043 | fflush (stderr); |
| 3044 | BFD_FAIL (); |
| 3045 | } |
| 3046 | |
| 3047 | void |
| 3048 | DEFUN (elf_no_info_to_howto_rel, (abfd, cache_ptr, dst), |
| 3049 | bfd * abfd AND |
| 3050 | arelent * cache_ptr AND |
| 3051 | Elf_Internal_Rel * dst) |
| 3052 | { |
| 3053 | fprintf (stderr, "elf REL relocation support for target machine unimplemented\n"); |
| 3054 | fflush (stderr); |
| 3055 | BFD_FAIL (); |
| 3056 | } |
| 3057 | |
| 3058 | \f |
| 3059 | /* Core file support */ |
| 3060 | |
| 3061 | #ifdef HAVE_PROCFS /* Some core file support requires host /proc files */ |
| 3062 | #include <sys/procfs.h> |
| 3063 | #else |
| 3064 | #define bfd_prstatus(abfd, descdata, descsz, filepos) /* Define away */ |
| 3065 | #define bfd_fpregset(abfd, descdata, descsz, filepos) /* Define away */ |
| 3066 | #define bfd_prpsinfo(abfd, descdata, descsz, filepos) /* Define away */ |
| 3067 | #endif |
| 3068 | |
| 3069 | #ifdef HAVE_PROCFS |
| 3070 | |
| 3071 | static void |
| 3072 | DEFUN (bfd_prstatus, (abfd, descdata, descsz, filepos), |
| 3073 | bfd * abfd AND |
| 3074 | char *descdata AND |
| 3075 | int descsz AND |
| 3076 | long filepos) |
| 3077 | { |
| 3078 | asection *newsect; |
| 3079 | prstatus_t *status = (prstatus_t *) 0; |
| 3080 | |
| 3081 | if (descsz == sizeof (prstatus_t)) |
| 3082 | { |
| 3083 | newsect = bfd_make_section (abfd, ".reg"); |
| 3084 | newsect->_raw_size = sizeof (status->pr_reg); |
| 3085 | newsect->filepos = filepos + (long) &status->pr_reg; |
| 3086 | newsect->flags = SEC_ALLOC | SEC_HAS_CONTENTS; |
| 3087 | newsect->alignment_power = 2; |
| 3088 | if ((core_prstatus (abfd) = bfd_alloc (abfd, descsz)) != NULL) |
| 3089 | { |
| 3090 | memcpy (core_prstatus (abfd), descdata, descsz); |
| 3091 | } |
| 3092 | } |
| 3093 | } |
| 3094 | |
| 3095 | /* Stash a copy of the prpsinfo structure away for future use. */ |
| 3096 | |
| 3097 | static void |
| 3098 | DEFUN (bfd_prpsinfo, (abfd, descdata, descsz, filepos), |
| 3099 | bfd * abfd AND |
| 3100 | char *descdata AND |
| 3101 | int descsz AND |
| 3102 | long filepos) |
| 3103 | { |
| 3104 | asection *newsect; |
| 3105 | |
| 3106 | if (descsz == sizeof (prpsinfo_t)) |
| 3107 | { |
| 3108 | if ((core_prpsinfo (abfd) = bfd_alloc (abfd, descsz)) != NULL) |
| 3109 | { |
| 3110 | memcpy (core_prpsinfo (abfd), descdata, descsz); |
| 3111 | } |
| 3112 | } |
| 3113 | } |
| 3114 | |
| 3115 | static void |
| 3116 | DEFUN (bfd_fpregset, (abfd, descdata, descsz, filepos), |
| 3117 | bfd * abfd AND |
| 3118 | char *descdata AND |
| 3119 | int descsz AND |
| 3120 | long filepos) |
| 3121 | { |
| 3122 | asection *newsect; |
| 3123 | |
| 3124 | newsect = bfd_make_section (abfd, ".reg2"); |
| 3125 | newsect->_raw_size = descsz; |
| 3126 | newsect->filepos = filepos; |
| 3127 | newsect->flags = SEC_ALLOC | SEC_HAS_CONTENTS; |
| 3128 | newsect->alignment_power = 2; |
| 3129 | } |
| 3130 | |
| 3131 | #endif /* HAVE_PROCFS */ |
| 3132 | |
| 3133 | /* Return a pointer to the args (including the command name) that were |
| 3134 | seen by the program that generated the core dump. Note that for |
| 3135 | some reason, a spurious space is tacked onto the end of the args |
| 3136 | in some (at least one anyway) implementations, so strip it off if |
| 3137 | it exists. */ |
| 3138 | |
| 3139 | char * |
| 3140 | DEFUN (elf_core_file_failing_command, (abfd), |
| 3141 | bfd * abfd) |
| 3142 | { |
| 3143 | #ifdef HAVE_PROCFS |
| 3144 | if (core_prpsinfo (abfd)) |
| 3145 | { |
| 3146 | prpsinfo_t *p = core_prpsinfo (abfd); |
| 3147 | char *scan = p->pr_psargs; |
| 3148 | while (*scan++) |
| 3149 | {; |
| 3150 | } |
| 3151 | scan -= 2; |
| 3152 | if ((scan > p->pr_psargs) && (*scan == ' ')) |
| 3153 | { |
| 3154 | *scan = '\000'; |
| 3155 | } |
| 3156 | return p->pr_psargs; |
| 3157 | } |
| 3158 | #endif |
| 3159 | return NULL; |
| 3160 | } |
| 3161 | |
| 3162 | /* Return the number of the signal that caused the core dump. Presumably, |
| 3163 | since we have a core file, we got a signal of some kind, so don't bother |
| 3164 | checking the other process status fields, just return the signal number. |
| 3165 | */ |
| 3166 | |
| 3167 | int |
| 3168 | DEFUN (elf_core_file_failing_signal, (abfd), |
| 3169 | bfd * abfd) |
| 3170 | { |
| 3171 | #ifdef HAVE_PROCFS |
| 3172 | if (core_prstatus (abfd)) |
| 3173 | { |
| 3174 | return ((prstatus_t *) (core_prstatus (abfd)))->pr_cursig; |
| 3175 | } |
| 3176 | #endif |
| 3177 | return -1; |
| 3178 | } |
| 3179 | |
| 3180 | /* Check to see if the core file could reasonably be expected to have |
| 3181 | come for the current executable file. Note that by default we return |
| 3182 | true unless we find something that indicates that there might be a |
| 3183 | problem. |
| 3184 | */ |
| 3185 | |
| 3186 | boolean |
| 3187 | DEFUN (elf_core_file_matches_executable_p, (core_bfd, exec_bfd), |
| 3188 | bfd * core_bfd AND |
| 3189 | bfd * exec_bfd) |
| 3190 | { |
| 3191 | #ifdef HAVE_PROCFS |
| 3192 | char *corename; |
| 3193 | char *execname; |
| 3194 | #endif |
| 3195 | |
| 3196 | /* First, xvecs must match since both are ELF files for the same target. */ |
| 3197 | |
| 3198 | if (core_bfd->xvec != exec_bfd->xvec) |
| 3199 | { |
| 3200 | bfd_error = system_call_error; |
| 3201 | return false; |
| 3202 | } |
| 3203 | |
| 3204 | #ifdef HAVE_PROCFS |
| 3205 | |
| 3206 | /* If no prpsinfo, just return true. Otherwise, grab the last component |
| 3207 | of the exec'd pathname from the prpsinfo. */ |
| 3208 | |
| 3209 | if (core_prpsinfo (core_bfd)) |
| 3210 | { |
| 3211 | corename = (((struct prpsinfo *) core_prpsinfo (core_bfd))->pr_fname); |
| 3212 | } |
| 3213 | else |
| 3214 | { |
| 3215 | return true; |
| 3216 | } |
| 3217 | |
| 3218 | /* Find the last component of the executable pathname. */ |
| 3219 | |
| 3220 | if ((execname = strrchr (exec_bfd->filename, '/')) != NULL) |
| 3221 | { |
| 3222 | execname++; |
| 3223 | } |
| 3224 | else |
| 3225 | { |
| 3226 | execname = (char *) exec_bfd->filename; |
| 3227 | } |
| 3228 | |
| 3229 | /* See if they match */ |
| 3230 | |
| 3231 | return strcmp (execname, corename) ? false : true; |
| 3232 | |
| 3233 | #else |
| 3234 | |
| 3235 | return true; |
| 3236 | |
| 3237 | #endif /* HAVE_PROCFS */ |
| 3238 | } |
| 3239 | |
| 3240 | /* ELF core files contain a segment of type PT_NOTE, that holds much of |
| 3241 | the information that would normally be available from the /proc interface |
| 3242 | for the process, at the time the process dumped core. Currently this |
| 3243 | includes copies of the prstatus, prpsinfo, and fpregset structures. |
| 3244 | |
| 3245 | Since these structures are potentially machine dependent in size and |
| 3246 | ordering, bfd provides two levels of support for them. The first level, |
| 3247 | available on all machines since it does not require that the host |
| 3248 | have /proc support or the relevant include files, is to create a bfd |
| 3249 | section for each of the prstatus, prpsinfo, and fpregset structures, |
| 3250 | without any interpretation of their contents. With just this support, |
| 3251 | the bfd client will have to interpret the structures itself. Even with |
| 3252 | /proc support, it might want these full structures for it's own reasons. |
| 3253 | |
| 3254 | In the second level of support, where HAVE_PROCFS is defined, bfd will |
| 3255 | pick apart the structures to gather some additional information that |
| 3256 | clients may want, such as the general register set, the name of the |
| 3257 | exec'ed file and its arguments, the signal (if any) that caused the |
| 3258 | core dump, etc. |
| 3259 | |
| 3260 | */ |
| 3261 | |
| 3262 | static boolean |
| 3263 | DEFUN (elf_corefile_note, (abfd, hdr), |
| 3264 | bfd * abfd AND |
| 3265 | Elf_Internal_Phdr * hdr) |
| 3266 | { |
| 3267 | Elf_External_Note *x_note_p; /* Elf note, external form */ |
| 3268 | Elf_Internal_Note i_note; /* Elf note, internal form */ |
| 3269 | char *buf = NULL; /* Entire note segment contents */ |
| 3270 | char *namedata; /* Name portion of the note */ |
| 3271 | char *descdata; /* Descriptor portion of the note */ |
| 3272 | char *sectname; /* Name to use for new section */ |
| 3273 | long filepos; /* File offset to descriptor data */ |
| 3274 | asection *newsect; |
| 3275 | |
| 3276 | if (hdr->p_filesz > 0 |
| 3277 | && (buf = (char *) bfd_xmalloc (hdr->p_filesz)) != NULL |
| 3278 | && bfd_seek (abfd, hdr->p_offset, SEEK_SET) != -1 |
| 3279 | && bfd_read ((PTR) buf, hdr->p_filesz, 1, abfd) == hdr->p_filesz) |
| 3280 | { |
| 3281 | x_note_p = (Elf_External_Note *) buf; |
| 3282 | while ((char *) x_note_p < (buf + hdr->p_filesz)) |
| 3283 | { |
| 3284 | i_note.namesz = bfd_h_get_32 (abfd, (bfd_byte *) x_note_p->namesz); |
| 3285 | i_note.descsz = bfd_h_get_32 (abfd, (bfd_byte *) x_note_p->descsz); |
| 3286 | i_note.type = bfd_h_get_32 (abfd, (bfd_byte *) x_note_p->type); |
| 3287 | namedata = x_note_p->name; |
| 3288 | descdata = namedata + BFD_ALIGN (i_note.namesz, 4); |
| 3289 | filepos = hdr->p_offset + (descdata - buf); |
| 3290 | switch (i_note.type) |
| 3291 | { |
| 3292 | case NT_PRSTATUS: |
| 3293 | /* process descdata as prstatus info */ |
| 3294 | bfd_prstatus (abfd, descdata, i_note.descsz, filepos); |
| 3295 | sectname = ".prstatus"; |
| 3296 | break; |
| 3297 | case NT_FPREGSET: |
| 3298 | /* process descdata as fpregset info */ |
| 3299 | bfd_fpregset (abfd, descdata, i_note.descsz, filepos); |
| 3300 | sectname = ".fpregset"; |
| 3301 | break; |
| 3302 | case NT_PRPSINFO: |
| 3303 | /* process descdata as prpsinfo */ |
| 3304 | bfd_prpsinfo (abfd, descdata, i_note.descsz, filepos); |
| 3305 | sectname = ".prpsinfo"; |
| 3306 | break; |
| 3307 | default: |
| 3308 | /* Unknown descriptor, just ignore it. */ |
| 3309 | sectname = NULL; |
| 3310 | break; |
| 3311 | } |
| 3312 | if (sectname != NULL) |
| 3313 | { |
| 3314 | newsect = bfd_make_section (abfd, sectname); |
| 3315 | newsect->_raw_size = i_note.descsz; |
| 3316 | newsect->filepos = filepos; |
| 3317 | newsect->flags = SEC_ALLOC | SEC_HAS_CONTENTS; |
| 3318 | newsect->alignment_power = 2; |
| 3319 | } |
| 3320 | x_note_p = (Elf_External_Note *) |
| 3321 | (descdata + BFD_ALIGN (i_note.descsz, 4)); |
| 3322 | } |
| 3323 | } |
| 3324 | if (buf != NULL) |
| 3325 | { |
| 3326 | free (buf); |
| 3327 | } |
| 3328 | return true; |
| 3329 | |
| 3330 | } |
| 3331 | |
| 3332 | /* Core files are simply standard ELF formatted files that partition |
| 3333 | the file using the execution view of the file (program header table) |
| 3334 | rather than the linking view. In fact, there is no section header |
| 3335 | table in a core file. |
| 3336 | |
| 3337 | The process status information (including the contents of the general |
| 3338 | register set) and the floating point register set are stored in a |
| 3339 | segment of type PT_NOTE. We handcraft a couple of extra bfd sections |
| 3340 | that allow standard bfd access to the general registers (.reg) and the |
| 3341 | floating point registers (.reg2). |
| 3342 | |
| 3343 | */ |
| 3344 | |
| 3345 | bfd_target * |
| 3346 | DEFUN (elf_core_file_p, (abfd), bfd * abfd) |
| 3347 | { |
| 3348 | Elf_External_Ehdr x_ehdr; /* Elf file header, external form */ |
| 3349 | Elf_Internal_Ehdr *i_ehdrp; /* Elf file header, internal form */ |
| 3350 | Elf_External_Phdr x_phdr; /* Program header table entry, external form */ |
| 3351 | Elf_Internal_Phdr *i_phdrp; /* Program header table, internal form */ |
| 3352 | unsigned int phindex; |
| 3353 | |
| 3354 | /* Read in the ELF header in external format. */ |
| 3355 | |
| 3356 | if (bfd_read ((PTR) & x_ehdr, sizeof (x_ehdr), 1, abfd) != sizeof (x_ehdr)) |
| 3357 | { |
| 3358 | bfd_error = system_call_error; |
| 3359 | return NULL; |
| 3360 | } |
| 3361 | |
| 3362 | /* Now check to see if we have a valid ELF file, and one that BFD can |
| 3363 | make use of. The magic number must match, the address size ('class') |
| 3364 | and byte-swapping must match our XVEC entry, and it must have a |
| 3365 | program header table (FIXME: See comments re segments at top of this |
| 3366 | file). */ |
| 3367 | |
| 3368 | if (elf_file_p (&x_ehdr) == false) |
| 3369 | { |
| 3370 | wrong: |
| 3371 | bfd_error = wrong_format; |
| 3372 | return NULL; |
| 3373 | } |
| 3374 | |
| 3375 | /* FIXME, Check EI_VERSION here ! */ |
| 3376 | |
| 3377 | { |
| 3378 | #if ARCH_SIZE == 32 |
| 3379 | int desired_address_size = ELFCLASS32; |
| 3380 | #endif |
| 3381 | #if ARCH_SIZE == 64 |
| 3382 | int desired_address_size = ELFCLASS64; |
| 3383 | #endif |
| 3384 | |
| 3385 | if (x_ehdr.e_ident[EI_CLASS] != desired_address_size) |
| 3386 | goto wrong; |
| 3387 | } |
| 3388 | |
| 3389 | /* Switch xvec to match the specified byte order. */ |
| 3390 | switch (x_ehdr.e_ident[EI_DATA]) |
| 3391 | { |
| 3392 | case ELFDATA2MSB: /* Big-endian */ |
| 3393 | if (abfd->xvec->byteorder_big_p == false) |
| 3394 | goto wrong; |
| 3395 | break; |
| 3396 | case ELFDATA2LSB: /* Little-endian */ |
| 3397 | if (abfd->xvec->byteorder_big_p == true) |
| 3398 | goto wrong; |
| 3399 | break; |
| 3400 | case ELFDATANONE: /* No data encoding specified */ |
| 3401 | default: /* Unknown data encoding specified */ |
| 3402 | goto wrong; |
| 3403 | } |
| 3404 | |
| 3405 | /* Allocate an instance of the elf_obj_tdata structure and hook it up to |
| 3406 | the tdata pointer in the bfd. */ |
| 3407 | |
| 3408 | elf_tdata (abfd) = |
| 3409 | (struct elf_obj_tdata *) bfd_zalloc (abfd, sizeof (struct elf_obj_tdata)); |
| 3410 | if (elf_tdata (abfd) == NULL) |
| 3411 | { |
| 3412 | bfd_error = no_memory; |
| 3413 | return NULL; |
| 3414 | } |
| 3415 | |
| 3416 | /* FIXME, `wrong' returns from this point onward, leak memory. */ |
| 3417 | |
| 3418 | /* Now that we know the byte order, swap in the rest of the header */ |
| 3419 | i_ehdrp = elf_elfheader (abfd); |
| 3420 | elf_swap_ehdr_in (abfd, &x_ehdr, i_ehdrp); |
| 3421 | #if DEBUG & 1 |
| 3422 | elf_debug_file (i_ehdrp); |
| 3423 | #endif |
| 3424 | |
| 3425 | /* If there is no program header, or the type is not a core file, then |
| 3426 | we are hosed. */ |
| 3427 | if (i_ehdrp->e_phoff == 0 || i_ehdrp->e_type != ET_CORE) |
| 3428 | goto wrong; |
| 3429 | |
| 3430 | /* Allocate space for a copy of the program header table in |
| 3431 | internal form, seek to the program header table in the file, |
| 3432 | read it in, and convert it to internal form. As a simple sanity |
| 3433 | check, verify that the what BFD thinks is the size of each program |
| 3434 | header table entry actually matches the size recorded in the file. */ |
| 3435 | |
| 3436 | if (i_ehdrp->e_phentsize != sizeof (x_phdr)) |
| 3437 | goto wrong; |
| 3438 | i_phdrp = (Elf_Internal_Phdr *) |
| 3439 | bfd_alloc (abfd, sizeof (*i_phdrp) * i_ehdrp->e_phnum); |
| 3440 | if (!i_phdrp) |
| 3441 | { |
| 3442 | bfd_error = no_memory; |
| 3443 | return NULL; |
| 3444 | } |
| 3445 | if (bfd_seek (abfd, i_ehdrp->e_phoff, SEEK_SET) == -1) |
| 3446 | { |
| 3447 | bfd_error = system_call_error; |
| 3448 | return NULL; |
| 3449 | } |
| 3450 | for (phindex = 0; phindex < i_ehdrp->e_phnum; phindex++) |
| 3451 | { |
| 3452 | if (bfd_read ((PTR) & x_phdr, sizeof (x_phdr), 1, abfd) |
| 3453 | != sizeof (x_phdr)) |
| 3454 | { |
| 3455 | bfd_error = system_call_error; |
| 3456 | return NULL; |
| 3457 | } |
| 3458 | elf_swap_phdr_in (abfd, &x_phdr, i_phdrp + phindex); |
| 3459 | } |
| 3460 | |
| 3461 | /* Once all of the program headers have been read and converted, we |
| 3462 | can start processing them. */ |
| 3463 | |
| 3464 | for (phindex = 0; phindex < i_ehdrp->e_phnum; phindex++) |
| 3465 | { |
| 3466 | bfd_section_from_phdr (abfd, i_phdrp + phindex, phindex); |
| 3467 | if ((i_phdrp + phindex)->p_type == PT_NOTE) |
| 3468 | { |
| 3469 | elf_corefile_note (abfd, i_phdrp + phindex); |
| 3470 | } |
| 3471 | } |
| 3472 | |
| 3473 | /* Remember the entry point specified in the ELF file header. */ |
| 3474 | |
| 3475 | bfd_get_start_address (abfd) = i_ehdrp->e_entry; |
| 3476 | |
| 3477 | return abfd->xvec; |
| 3478 | } |