| 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. |
| 13 | |
| 14 | This file is part of BFD, the Binary File Descriptor library. |
| 15 | |
| 16 | This program is free software; you can redistribute it and/or modify |
| 17 | it under the terms of the GNU General Public License as published by |
| 18 | the Free Software Foundation; either version 2 of the License, or |
| 19 | (at your option) any later version. |
| 20 | |
| 21 | This program is distributed in the hope that it will be useful, |
| 22 | but WITHOUT ANY WARRANTY; without even the implied warranty of |
| 23 | MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the |
| 24 | GNU General Public License for more details. |
| 25 | |
| 26 | You should have received a copy of the GNU General Public License |
| 27 | along with this program; if not, write to the Free Software |
| 28 | Foundation, Inc., 675 Mass Ave, Cambridge, MA 02139, USA. */ |
| 29 | |
| 30 | |
| 31 | /**************************************** |
| 32 | |
| 33 | WARNING |
| 34 | |
| 35 | This is only a partial ELF implementation, |
| 36 | incorporating only those parts that are |
| 37 | required to get gdb up and running. It is |
| 38 | expected that it will be expanded to a full |
| 39 | ELF implementation at some future date. |
| 40 | |
| 41 | Unimplemented stubs call abort() to ensure |
| 42 | that they get proper attention if they are |
| 43 | ever called. The stubs are here since |
| 44 | this version was hacked from the COFF |
| 45 | version, and thus they will probably |
| 46 | go away or get expanded appropriately in a |
| 47 | future version. |
| 48 | |
| 49 | fnf@cygnus.com |
| 50 | |
| 51 | *****************************************/ |
| 52 | |
| 53 | |
| 54 | /* Problems and other issues to resolve. |
| 55 | |
| 56 | (1) BFD expects there to be some fixed number of "sections" in |
| 57 | the object file. I.E. there is a "section_count" variable in the |
| 58 | bfd structure which contains the number of sections. However, ELF |
| 59 | supports multiple "views" of a file. In particular, with current |
| 60 | implementations, executable files typically have two tables, a |
| 61 | program header table and a section header table, both of which |
| 62 | partition the executable. |
| 63 | |
| 64 | In ELF-speak, the "linking view" of the file uses the section header |
| 65 | table to access "sections" within the file, and the "execution view" |
| 66 | uses the program header table to access "segments" within the file. |
| 67 | "Segments" typically may contain all the data from one or more |
| 68 | "sections". |
| 69 | |
| 70 | Note that the section header table is optional in ELF executables, |
| 71 | but it is this information that is most useful to gdb. If the |
| 72 | section header table is missing, then gdb should probably try |
| 73 | to make do with the program header table. (FIXME) |
| 74 | |
| 75 | */ |
| 76 | |
| 77 | #include <string.h> /* For strrchr and friends */ |
| 78 | #include "bfd.h" |
| 79 | #include "sysdep.h" |
| 80 | #include "libbfd.h" |
| 81 | #include "libelf.h" |
| 82 | |
| 83 | #ifdef HAVE_PROCFS /* Some core file support requires host /proc files */ |
| 84 | #include <sys/procfs.h> |
| 85 | #else |
| 86 | #define bfd_prstatus(abfd, descdata, descsz, filepos) /* Define away */ |
| 87 | #define bfd_fpregset(abfd, descdata, descsz, filepos) /* Define away */ |
| 88 | #define bfd_prpsinfo(abfd, descdata, descsz, filepos) /* Define away */ |
| 89 | #endif |
| 90 | |
| 91 | /* Forward declarations of static functions */ |
| 92 | |
| 93 | static char * |
| 94 | elf_read PARAMS ((bfd *, long, int)); |
| 95 | |
| 96 | static struct sec * |
| 97 | section_from_elf_index PARAMS ((bfd *, int)); |
| 98 | |
| 99 | static int |
| 100 | elf_section_from_bfd_section PARAMS ((bfd *, struct sec *)); |
| 101 | |
| 102 | static boolean |
| 103 | elf_slurp_symbol_table PARAMS ((bfd *, asymbol **)); |
| 104 | |
| 105 | static char * |
| 106 | elf_get_str_section PARAMS ((bfd *, unsigned int)); |
| 107 | |
| 108 | /* Some private data is stashed away for future use using the tdata pointer |
| 109 | in the bfd structure. */ |
| 110 | |
| 111 | struct elf_obj_tdata |
| 112 | { |
| 113 | Elf_Internal_Ehdr elf_header[1]; /* Actual data, but ref like ptr */ |
| 114 | Elf_Internal_Shdr *elf_sect_ptr; |
| 115 | struct strtab *strtab_ptr; |
| 116 | int symtab_section; |
| 117 | void *prstatus; /* The raw /proc prstatus structure */ |
| 118 | void *prpsinfo; /* The raw /proc prpsinfo structure */ |
| 119 | Elf_External_Sym *raw_syms; |
| 120 | Elf_Internal_Sym *internal_syms; |
| 121 | elf_symbol_type *symbols; |
| 122 | }; |
| 123 | |
| 124 | #define elf_tdata(bfd) ((bfd) -> tdata.elf_obj_data) |
| 125 | #define elf_elfheader(bfd) (elf_tdata(bfd) -> elf_header) |
| 126 | #define elf_elfsections(bfd) (elf_tdata(bfd) -> elf_sect_ptr) |
| 127 | #define elf_shstrtab(bfd) (elf_tdata(bfd) -> strtab_ptr) |
| 128 | #define elf_onesymtab(bfd) (elf_tdata(bfd) -> symtab_section) |
| 129 | #define core_prpsinfo(bfd) (elf_tdata(bfd) -> prpsinfo) |
| 130 | #define core_prstatus(bfd) (elf_tdata(bfd) -> prstatus) |
| 131 | #define obj_symbols(bfd) (elf_tdata(bfd) -> symbols) |
| 132 | #define obj_raw_syms(bfd) (elf_tdata(bfd) -> raw_syms) |
| 133 | #define obj_internal_syms(bfd) (elf_tdata(bfd) -> internal_syms) |
| 134 | |
| 135 | /* Translate an ELF symbol in external format into an ELF symbol in internal |
| 136 | format. */ |
| 137 | |
| 138 | static void |
| 139 | DEFUN(elf_swap_symbol_in,(abfd, src, dst), |
| 140 | bfd *abfd AND |
| 141 | Elf_External_Sym *src AND |
| 142 | Elf_Internal_Sym *dst) |
| 143 | { |
| 144 | dst -> st_name = bfd_h_get_32 (abfd, (bfd_byte *) src -> st_name); |
| 145 | dst -> st_value = bfd_h_get_32 (abfd, (bfd_byte *) src -> st_value); |
| 146 | dst -> st_size = bfd_h_get_32 (abfd, (bfd_byte *) src -> st_size); |
| 147 | dst -> st_info = bfd_h_get_8 (abfd, (bfd_byte *) src -> st_info); |
| 148 | dst -> st_other = bfd_h_get_8 (abfd, (bfd_byte *) src -> st_other); |
| 149 | dst -> st_shndx = bfd_h_get_16 (abfd, (bfd_byte *) src -> st_shndx); |
| 150 | } |
| 151 | |
| 152 | /* Translate an ELF symbol in internal format into an ELF symbol in external |
| 153 | format. */ |
| 154 | |
| 155 | static void |
| 156 | DEFUN(elf_swap_symbol_out,(abfd, src, dst), |
| 157 | bfd *abfd AND |
| 158 | Elf_Internal_Sym *src AND |
| 159 | Elf_External_Sym *dst) |
| 160 | { |
| 161 | bfd_h_put_32 (abfd, src->st_name, dst->st_name); |
| 162 | bfd_h_put_32 (abfd, src->st_value, dst->st_value); |
| 163 | bfd_h_put_32 (abfd, src->st_size, dst->st_size); |
| 164 | bfd_h_put_8 (abfd, src->st_info, dst->st_info); |
| 165 | bfd_h_put_8 (abfd, src->st_other, dst->st_other); |
| 166 | bfd_h_put_16 (abfd, src->st_shndx, dst->st_shndx); |
| 167 | } |
| 168 | |
| 169 | |
| 170 | /* Translate an ELF file header in external format into an ELF file header in |
| 171 | internal format. */ |
| 172 | |
| 173 | static void |
| 174 | DEFUN(elf_swap_ehdr_in,(abfd, src, dst), |
| 175 | bfd *abfd AND |
| 176 | Elf_External_Ehdr *src AND |
| 177 | Elf_Internal_Ehdr *dst) |
| 178 | { |
| 179 | memcpy (dst -> e_ident, src -> e_ident, EI_NIDENT); |
| 180 | dst -> e_type = bfd_h_get_16 (abfd, (bfd_byte *) src -> e_type); |
| 181 | dst -> e_machine = bfd_h_get_16 (abfd, (bfd_byte *) src -> e_machine); |
| 182 | dst -> e_version = bfd_h_get_32 (abfd, (bfd_byte *) src -> e_version); |
| 183 | dst -> e_entry = bfd_h_get_32 (abfd, (bfd_byte *) src -> e_entry); |
| 184 | dst -> e_phoff = bfd_h_get_32 (abfd, (bfd_byte *) src -> e_phoff); |
| 185 | dst -> e_shoff = bfd_h_get_32 (abfd, (bfd_byte *) src -> e_shoff); |
| 186 | dst -> e_flags = bfd_h_get_32 (abfd, (bfd_byte *) src -> e_flags); |
| 187 | dst -> e_ehsize = bfd_h_get_16 (abfd, (bfd_byte *) src -> e_ehsize); |
| 188 | dst -> e_phentsize = bfd_h_get_16 (abfd, (bfd_byte *) src -> e_phentsize); |
| 189 | dst -> e_phnum = bfd_h_get_16 (abfd, (bfd_byte *) src -> e_phnum); |
| 190 | dst -> e_shentsize = bfd_h_get_16 (abfd, (bfd_byte *) src -> e_shentsize); |
| 191 | dst -> e_shnum = bfd_h_get_16 (abfd, (bfd_byte *) src -> e_shnum); |
| 192 | dst -> e_shstrndx = bfd_h_get_16 (abfd, (bfd_byte *) src -> e_shstrndx); |
| 193 | } |
| 194 | |
| 195 | /* Translate an ELF file header in internal format into an ELF file header in |
| 196 | external format. */ |
| 197 | |
| 198 | static void |
| 199 | DEFUN(elf_swap_ehdr_out,(abfd, src, dst), |
| 200 | bfd *abfd AND |
| 201 | Elf_Internal_Ehdr *src AND |
| 202 | Elf_External_Ehdr *dst) |
| 203 | { |
| 204 | memcpy (dst -> e_ident, src -> e_ident, EI_NIDENT); |
| 205 | /* note that all elements of dst are *arrays of unsigned char* already... */ |
| 206 | bfd_h_put_16 (abfd, src->e_type, dst->e_type); |
| 207 | bfd_h_put_16 (abfd, src->e_machine, dst->e_machine); |
| 208 | bfd_h_put_32 (abfd, src->e_version, dst->e_version); |
| 209 | bfd_h_put_32 (abfd, src->e_entry, dst->e_entry); |
| 210 | bfd_h_put_32 (abfd, src->e_phoff, dst->e_phoff); |
| 211 | bfd_h_put_32 (abfd, src->e_shoff, dst->e_shoff); |
| 212 | bfd_h_put_32 (abfd, src->e_flags, dst->e_flags); |
| 213 | bfd_h_put_16 (abfd, src->e_ehsize, dst->e_ehsize); |
| 214 | bfd_h_put_16 (abfd, src->e_phentsize, dst->e_phentsize); |
| 215 | bfd_h_put_16 (abfd, src->e_phnum, dst->e_phnum); |
| 216 | bfd_h_put_16 (abfd, src->e_shentsize, dst->e_shentsize); |
| 217 | bfd_h_put_16 (abfd, src->e_shnum, dst->e_shnum); |
| 218 | bfd_h_put_16 (abfd, src->e_shstrndx, dst->e_shstrndx); |
| 219 | } |
| 220 | |
| 221 | |
| 222 | /* Translate an ELF section header table entry in external format into an |
| 223 | ELF section header table entry in internal format. */ |
| 224 | |
| 225 | static void |
| 226 | DEFUN(elf_swap_shdr_in,(abfd, src, dst), |
| 227 | bfd *abfd AND |
| 228 | Elf_External_Shdr *src AND |
| 229 | Elf_Internal_Shdr *dst) |
| 230 | { |
| 231 | dst->sh_name = bfd_h_get_32 (abfd, (bfd_byte *) src->sh_name); |
| 232 | dst->sh_type = bfd_h_get_32 (abfd, (bfd_byte *) src->sh_type); |
| 233 | dst->sh_flags = bfd_h_get_32 (abfd, (bfd_byte *) src->sh_flags); |
| 234 | dst->sh_addr = bfd_h_get_32 (abfd, (bfd_byte *) src->sh_addr); |
| 235 | dst->sh_offset = bfd_h_get_32 (abfd, (bfd_byte *) src->sh_offset); |
| 236 | dst->sh_size = bfd_h_get_32 (abfd, (bfd_byte *) src->sh_size); |
| 237 | dst->sh_link = bfd_h_get_32 (abfd, (bfd_byte *) src->sh_link); |
| 238 | dst->sh_info = bfd_h_get_32 (abfd, (bfd_byte *) src->sh_info); |
| 239 | dst->sh_addralign = bfd_h_get_32 (abfd, (bfd_byte *) src->sh_addralign); |
| 240 | dst->sh_entsize = bfd_h_get_32 (abfd, (bfd_byte *) src->sh_entsize); |
| 241 | /* we haven't done any processing on it yet, so... */ |
| 242 | dst->rawdata = (void*)0; |
| 243 | } |
| 244 | |
| 245 | /* Translate an ELF section header table entry in internal format into an |
| 246 | ELF section header table entry in external format. */ |
| 247 | |
| 248 | static void |
| 249 | DEFUN(elf_swap_shdr_out,(abfd, src, dst), |
| 250 | bfd *abfd AND |
| 251 | Elf_Internal_Shdr *src AND |
| 252 | Elf_External_Shdr *dst) |
| 253 | { |
| 254 | /* note that all elements of dst are *arrays of unsigned char* already... */ |
| 255 | bfd_h_put_32 (abfd, src->sh_name, dst->sh_name); |
| 256 | bfd_h_put_32 (abfd, src->sh_type, dst->sh_type); |
| 257 | bfd_h_put_32 (abfd, src->sh_flags, dst->sh_flags); |
| 258 | bfd_h_put_32 (abfd, src->sh_addr, dst->sh_addr); |
| 259 | bfd_h_put_32 (abfd, src->sh_offset, dst->sh_offset); |
| 260 | bfd_h_put_32 (abfd, src->sh_size, dst->sh_size); |
| 261 | bfd_h_put_32 (abfd, src->sh_link, dst->sh_link); |
| 262 | bfd_h_put_32 (abfd, src->sh_info, dst->sh_info); |
| 263 | bfd_h_put_32 (abfd, src->sh_addralign, dst->sh_addralign); |
| 264 | bfd_h_put_32 (abfd, src->sh_entsize, dst->sh_entsize); |
| 265 | } |
| 266 | |
| 267 | |
| 268 | /* Translate an ELF program header table entry in external format into an |
| 269 | ELF program header table entry in internal format. */ |
| 270 | |
| 271 | static void |
| 272 | DEFUN(elf_swap_phdr_in,(abfd, src, dst), |
| 273 | bfd *abfd AND |
| 274 | Elf_External_Phdr *src AND |
| 275 | Elf_Internal_Phdr *dst) |
| 276 | { |
| 277 | dst->p_type = bfd_h_get_32 (abfd, (bfd_byte *) src->p_type); |
| 278 | dst->p_offset = bfd_h_get_32 (abfd, (bfd_byte *) src->p_offset); |
| 279 | dst->p_vaddr = bfd_h_get_32 (abfd, (bfd_byte *) src->p_vaddr); |
| 280 | dst->p_paddr = bfd_h_get_32 (abfd, (bfd_byte *) src->p_paddr); |
| 281 | dst->p_filesz = bfd_h_get_32 (abfd, (bfd_byte *) src->p_filesz); |
| 282 | dst->p_memsz = bfd_h_get_32 (abfd, (bfd_byte *) src->p_memsz); |
| 283 | dst->p_flags = bfd_h_get_32 (abfd, (bfd_byte *) src->p_flags); |
| 284 | dst->p_align = bfd_h_get_32 (abfd, (bfd_byte *) src->p_align); |
| 285 | } |
| 286 | |
| 287 | /* ... */ |
| 288 | |
| 289 | static void |
| 290 | DEFUN(elf_swap_phdr_out,(abfd, src, dst), |
| 291 | bfd *abfd AND |
| 292 | Elf_Internal_Phdr *src AND |
| 293 | Elf_External_Phdr *dst) |
| 294 | { |
| 295 | /* note that all elements of dst are *arrays of unsigned char* already... */ |
| 296 | bfd_h_put_32 (abfd, src->p_type, dst->p_type); |
| 297 | bfd_h_put_32 (abfd, src->p_offset, dst->p_offset); |
| 298 | bfd_h_put_32 (abfd, src->p_vaddr, dst->p_vaddr); |
| 299 | bfd_h_put_32 (abfd, src->p_paddr, dst->p_paddr); |
| 300 | bfd_h_put_32 (abfd, src->p_filesz, dst->p_filesz); |
| 301 | bfd_h_put_32 (abfd, src->p_memsz, dst->p_memsz); |
| 302 | bfd_h_put_32 (abfd, src->p_flags, dst->p_flags); |
| 303 | bfd_h_put_32 (abfd, src->p_align, dst->p_align); |
| 304 | } |
| 305 | |
| 306 | /* Translate an ELF reloc from external format to internal format. */ |
| 307 | static void |
| 308 | DEFUN(elf_swap_reloc_in,(abfd, src, dst), |
| 309 | bfd *abfd AND |
| 310 | Elf_External_Rel *src AND |
| 311 | Elf_Internal_Rel *dst) |
| 312 | { |
| 313 | dst->r_offset = bfd_h_get_32 (abfd, (bfd_byte *) src->r_offset); |
| 314 | dst->r_info = bfd_h_get_32 (abfd, (bfd_byte *) src->r_info); |
| 315 | } |
| 316 | |
| 317 | static void |
| 318 | DEFUN(elf_swap_reloca_in,(abfd, src, dst), |
| 319 | bfd *abfd AND |
| 320 | Elf_External_Rela *src AND |
| 321 | Elf_Internal_Rela *dst) |
| 322 | { |
| 323 | dst->r_offset = bfd_h_get_32 (abfd, (bfd_byte *) src->r_offset); |
| 324 | dst->r_info = bfd_h_get_32 (abfd, (bfd_byte *) src->r_info); |
| 325 | dst->r_addend = bfd_h_get_32 (abfd, (bfd_byte *) src->r_addend); |
| 326 | } |
| 327 | |
| 328 | /* Translate an ELF reloc from internal format to external format. */ |
| 329 | static void |
| 330 | DEFUN(elf_swap_reloc_out,(abfd, src, dst), |
| 331 | bfd *abfd AND |
| 332 | Elf_Internal_Rel *src AND |
| 333 | Elf_External_Rel *dst) |
| 334 | { |
| 335 | bfd_h_put_32 (abfd, src->r_offset, dst->r_offset); |
| 336 | bfd_h_put_32 (abfd, src->r_info, dst->r_info); |
| 337 | } |
| 338 | |
| 339 | static void |
| 340 | DEFUN(elf_swap_reloca_out,(abfd, src, dst), |
| 341 | bfd *abfd AND |
| 342 | Elf_Internal_Rela *src AND |
| 343 | Elf_External_Rela *dst) |
| 344 | { |
| 345 | bfd_h_put_32 (abfd, src->r_offset, dst->r_offset); |
| 346 | bfd_h_put_32 (abfd, src->r_info, dst->r_info); |
| 347 | bfd_h_put_32 (abfd, src->r_addend, dst->r_addend); |
| 348 | } |
| 349 | |
| 350 | /* |
| 351 | INTERNAL_FUNCTION |
| 352 | bfd_elf_find_section |
| 353 | |
| 354 | SYNOPSIS |
| 355 | struct elf_internal_shdr *bfd_elf_find_section (bfd *abfd, char *name); |
| 356 | |
| 357 | DESCRIPTION |
| 358 | Helper functions for GDB to locate the string tables. |
| 359 | Since BFD hides string tables from callers, GDB needs to use an |
| 360 | internal hook to find them. Sun's .stabstr, in particular, |
| 361 | isn't even pointed to by the .stab section, so ordinary |
| 362 | mechanisms wouldn't work to find it, even if we had some. |
| 363 | */ |
| 364 | |
| 365 | struct elf_internal_shdr * |
| 366 | DEFUN(bfd_elf_find_section, (abfd, name), |
| 367 | bfd *abfd AND |
| 368 | char *name) |
| 369 | { |
| 370 | Elf_Internal_Shdr *i_shdrp; |
| 371 | Elf_Internal_Shdr *gotit = NULL; |
| 372 | char *shstrtab; |
| 373 | unsigned int max; |
| 374 | unsigned int i; |
| 375 | |
| 376 | i_shdrp = elf_elfsections (abfd); |
| 377 | if (i_shdrp != NULL) |
| 378 | { |
| 379 | shstrtab = elf_get_str_section (abfd, elf_elfheader (abfd)->e_shstrndx); |
| 380 | if (shstrtab != NULL) |
| 381 | { |
| 382 | max = elf_elfheader (abfd)->e_shnum; |
| 383 | for (i = 1; i < max; i++) |
| 384 | { |
| 385 | if (!strcmp (&shstrtab[i_shdrp[i].sh_name], name)) |
| 386 | { |
| 387 | gotit = &i_shdrp[i]; |
| 388 | } |
| 389 | } |
| 390 | } |
| 391 | } |
| 392 | return (gotit); |
| 393 | } |
| 394 | |
| 395 | /* End of GDB support. */ |
| 396 | |
| 397 | static char * |
| 398 | DEFUN(elf_get_str_section, (abfd, shindex), |
| 399 | bfd *abfd AND |
| 400 | unsigned int shindex) |
| 401 | { |
| 402 | Elf_Internal_Shdr *i_shdrp; |
| 403 | char *shstrtab = NULL; |
| 404 | unsigned int offset; |
| 405 | unsigned int shstrtabsize; |
| 406 | |
| 407 | i_shdrp = elf_elfsections (abfd); |
| 408 | if (i_shdrp != NULL) |
| 409 | { |
| 410 | shstrtab = i_shdrp[shindex].rawdata; |
| 411 | if (shstrtab == NULL) |
| 412 | { |
| 413 | /* No cached one, attempt to read, and cache what we read. */ |
| 414 | offset = i_shdrp[shindex].sh_offset; |
| 415 | shstrtabsize = i_shdrp[shindex].sh_size; |
| 416 | shstrtab = elf_read (abfd, offset, shstrtabsize); |
| 417 | i_shdrp[shindex].rawdata = (void*) shstrtab; |
| 418 | } |
| 419 | } |
| 420 | return (shstrtab); |
| 421 | } |
| 422 | |
| 423 | static char * |
| 424 | DEFUN(elf_string_from_elf_section, (abfd, shindex, strindex), |
| 425 | bfd *abfd AND |
| 426 | unsigned int shindex AND |
| 427 | unsigned int strindex) |
| 428 | { |
| 429 | Elf_Internal_Shdr *i_shdrp = elf_elfsections (abfd); |
| 430 | Elf_Internal_Shdr *hdr = i_shdrp + shindex; |
| 431 | |
| 432 | if (! hdr->rawdata) |
| 433 | { |
| 434 | if (elf_get_str_section (abfd, shindex) == NULL) |
| 435 | { |
| 436 | return NULL; |
| 437 | } |
| 438 | } |
| 439 | return ((char*)hdr->rawdata)+strindex; |
| 440 | } |
| 441 | |
| 442 | #define elf_string_from_elf_strtab(abfd, strindex) \ |
| 443 | elf_string_from_elf_section (abfd, elf_elfheader(abfd)->e_shstrndx, strindex) |
| 444 | |
| 445 | /* Create a new bfd section from an ELF section header. */ |
| 446 | |
| 447 | static boolean |
| 448 | DEFUN(bfd_section_from_shdr, (abfd, shindex), |
| 449 | bfd *abfd AND |
| 450 | unsigned int shindex) |
| 451 | { |
| 452 | Elf_Internal_Shdr *i_shdrp = elf_elfsections (abfd); |
| 453 | Elf_Internal_Shdr *hdr = i_shdrp + shindex; |
| 454 | asection *newsect; |
| 455 | char *name; |
| 456 | |
| 457 | name = hdr->sh_name ? elf_string_from_elf_strtab (abfd, hdr->sh_name) : ""; |
| 458 | |
| 459 | switch(hdr->sh_type) { |
| 460 | |
| 461 | case SHT_NULL: |
| 462 | /* inactive section. Throw it away. */ |
| 463 | return true; |
| 464 | |
| 465 | case SHT_PROGBITS: |
| 466 | /* Bits that get saved. This one is real. */ |
| 467 | if (! hdr->rawdata ) |
| 468 | { |
| 469 | newsect = bfd_make_section (abfd, name); |
| 470 | if (newsect != NULL) |
| 471 | { |
| 472 | newsect->vma = hdr->sh_addr; |
| 473 | newsect->_raw_size = hdr->sh_size; |
| 474 | newsect->filepos = hdr->sh_offset; /* so we can read back the bits */ |
| 475 | newsect->flags |= SEC_HAS_CONTENTS; |
| 476 | |
| 477 | if (hdr->sh_flags & SHF_ALLOC) |
| 478 | { |
| 479 | newsect->flags |= SEC_ALLOC; |
| 480 | newsect->flags |= SEC_LOAD; |
| 481 | } |
| 482 | |
| 483 | if (!(hdr->sh_flags & SHF_WRITE)) |
| 484 | newsect->flags |= SEC_READONLY; |
| 485 | |
| 486 | if (hdr->sh_flags & SHF_EXECINSTR) |
| 487 | newsect->flags |= SEC_CODE; /* FIXME: may only contain SOME code */ |
| 488 | else |
| 489 | newsect->flags |= SEC_DATA; |
| 490 | |
| 491 | hdr->rawdata = (void*)newsect; |
| 492 | } |
| 493 | } |
| 494 | return true; |
| 495 | |
| 496 | case SHT_NOBITS: |
| 497 | /* Bits that get saved. This one is real. */ |
| 498 | if (! hdr->rawdata ) |
| 499 | { |
| 500 | newsect = bfd_make_section (abfd, name); |
| 501 | if (newsect != NULL) |
| 502 | { |
| 503 | newsect->vma = hdr->sh_addr; |
| 504 | newsect->_raw_size = hdr->sh_size; |
| 505 | newsect->filepos = hdr->sh_offset; /* fake */ |
| 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 | BFD_ASSERT (hdr->sh_entsize == sizeof (Elf_External_Sym)); |
| 524 | elf_onesymtab (abfd) = shindex; |
| 525 | abfd->flags |= HAS_SYMS; |
| 526 | return true; |
| 527 | |
| 528 | case SHT_STRTAB: /* A string table */ |
| 529 | return true; |
| 530 | |
| 531 | case SHT_REL: |
| 532 | case SHT_RELA: |
| 533 | /* *these* do a lot of work -- but build no sections! */ |
| 534 | /* the spec says there can be multiple strtabs, but only one symtab */ |
| 535 | /* but there can be lots of REL* sections. */ |
| 536 | /* FIXME: The above statement is wrong! There are typically at least |
| 537 | two symbol tables in a dynamically linked executable, ".dynsym" |
| 538 | which is the dynamic linkage symbol table and ".symtab", which is |
| 539 | the "traditional" symbol table. -fnf */ |
| 540 | |
| 541 | { |
| 542 | asection *target_sect; |
| 543 | |
| 544 | bfd_section_from_shdr (abfd, hdr->sh_link); /* symbol table */ |
| 545 | bfd_section_from_shdr (abfd, hdr->sh_info); /* target */ |
| 546 | target_sect = section_from_elf_index (abfd, hdr->sh_info); |
| 547 | if (target_sect == NULL) |
| 548 | return false; |
| 549 | |
| 550 | #if 0 |
| 551 | /* FIXME: We are only prepared to read one symbol table, so |
| 552 | do NOT read the dynamic symbol table since it is only a |
| 553 | subset of the full symbol table. Also see comment above. -fnf */ |
| 554 | if (!elf_slurp_symbol_table(abfd, i_shdrp + hdr->sh_link)) |
| 555 | return false; |
| 556 | #endif |
| 557 | |
| 558 | target_sect->reloc_count = hdr->sh_size / hdr->sh_entsize; |
| 559 | target_sect->flags |= SEC_RELOC; |
| 560 | target_sect->relocation = 0; |
| 561 | target_sect->rel_filepos = hdr->sh_offset; |
| 562 | return true; |
| 563 | } |
| 564 | break; |
| 565 | |
| 566 | case SHT_HASH: |
| 567 | case SHT_DYNAMIC: |
| 568 | case SHT_DYNSYM: /* could treat this like symtab... */ |
| 569 | #if 0 |
| 570 | fprintf(stderr, "Dynamic Linking sections not yet supported.\n"); |
| 571 | abort (); |
| 572 | #endif |
| 573 | break; |
| 574 | |
| 575 | case SHT_NOTE: |
| 576 | #if 0 |
| 577 | fprintf(stderr, "Note Sections not yet supported.\n"); |
| 578 | abort (); |
| 579 | #endif |
| 580 | break; |
| 581 | |
| 582 | case SHT_SHLIB: |
| 583 | #if 0 |
| 584 | fprintf(stderr, "SHLIB Sections not supported (and non conforming.)\n"); |
| 585 | #endif |
| 586 | return true; |
| 587 | |
| 588 | default: |
| 589 | break; |
| 590 | } |
| 591 | |
| 592 | return (true); |
| 593 | } |
| 594 | |
| 595 | |
| 596 | |
| 597 | |
| 598 | struct strtab { |
| 599 | char *tab; |
| 600 | int nentries; |
| 601 | int length; |
| 602 | }; |
| 603 | |
| 604 | |
| 605 | static struct strtab * |
| 606 | DEFUN(bfd_new_strtab, (abfd), |
| 607 | bfd *abfd) |
| 608 | { |
| 609 | struct strtab *ss; |
| 610 | |
| 611 | ss = (struct strtab *) bfd_xmalloc(sizeof(struct strtab)); |
| 612 | ss->tab = bfd_xmalloc(1); |
| 613 | BFD_ASSERT(ss->tab != 0); |
| 614 | *ss->tab = 0; |
| 615 | ss->nentries = 0; |
| 616 | ss->length = 1; |
| 617 | |
| 618 | return ss; |
| 619 | } |
| 620 | |
| 621 | static int |
| 622 | DEFUN(bfd_add_to_strtab, (abfd, ss, str), |
| 623 | bfd *abfd AND |
| 624 | struct strtab *ss AND |
| 625 | CONST char *str) |
| 626 | { |
| 627 | /* should search first, but for now: */ |
| 628 | /* include the trailing NUL */ |
| 629 | int ln = strlen(str)+1; |
| 630 | |
| 631 | /* should this be using obstacks? */ |
| 632 | ss->tab = realloc(ss->tab, ss->length + ln); |
| 633 | |
| 634 | BFD_ASSERT(ss->tab != 0); |
| 635 | strcpy(ss->tab + ss->length, str); |
| 636 | ss->nentries++; |
| 637 | ss->length += ln; |
| 638 | |
| 639 | return ss->length - ln; |
| 640 | } |
| 641 | |
| 642 | static int |
| 643 | DEFUN(bfd_add_2_to_strtab, (abfd, ss, str, str2), |
| 644 | bfd *abfd AND |
| 645 | struct strtab *ss AND |
| 646 | char *str AND |
| 647 | CONST char *str2) |
| 648 | { |
| 649 | /* should search first, but for now: */ |
| 650 | /* include the trailing NUL */ |
| 651 | int ln = strlen(str)+strlen(str2)+1; |
| 652 | |
| 653 | /* should this be using obstacks? */ |
| 654 | if (ss->length) |
| 655 | ss->tab = realloc(ss->tab, ss->length + ln); |
| 656 | else |
| 657 | ss->tab = bfd_xmalloc(ln); |
| 658 | |
| 659 | BFD_ASSERT(ss->tab != 0); |
| 660 | strcpy(ss->tab + ss->length, str); |
| 661 | strcpy(ss->tab + ss->length + strlen(str), str2); |
| 662 | ss->nentries++; |
| 663 | ss->length += ln; |
| 664 | |
| 665 | return ss->length - ln; |
| 666 | } |
| 667 | |
| 668 | /* Create a new ELF section from a bfd section. */ |
| 669 | |
| 670 | static boolean |
| 671 | DEFUN(bfd_shdr_from_section, (abfd, hdr, shstrtab, indx), |
| 672 | bfd *abfd AND |
| 673 | Elf_Internal_Shdr *hdr AND |
| 674 | struct strtab *shstrtab AND |
| 675 | int indx) |
| 676 | { |
| 677 | asection *sect; |
| 678 | int ndx; |
| 679 | |
| 680 | /* figure out out to write the section name from the bfd section name. MWE */ |
| 681 | |
| 682 | sect = abfd->sections; |
| 683 | for (ndx = indx; --ndx; ) |
| 684 | { |
| 685 | sect = sect->next; |
| 686 | } |
| 687 | hdr[indx].sh_name = bfd_add_to_strtab(abfd, shstrtab, |
| 688 | bfd_section_name(abfd, sect)); |
| 689 | hdr[indx].sh_addr = sect->vma; |
| 690 | hdr[indx].sh_size = sect->_raw_size; |
| 691 | hdr[indx].sh_flags = 0; |
| 692 | /* these need to be preserved on */ |
| 693 | hdr[indx].sh_link = 0; |
| 694 | hdr[indx].sh_info = 0; |
| 695 | hdr[indx].sh_addralign = 0; |
| 696 | hdr[indx].sh_entsize = 0; |
| 697 | |
| 698 | hdr[indx].sh_type = 0; |
| 699 | if (sect->flags & SEC_RELOC) { |
| 700 | hdr[indx].sh_type = SHT_RELA; /* FIXME -- sparc specific */ |
| 701 | } |
| 702 | |
| 703 | if (sect->flags & SEC_HAS_CONTENTS) |
| 704 | { |
| 705 | hdr[indx].sh_offset = sect->filepos; |
| 706 | hdr[indx].sh_size = sect->_raw_size; |
| 707 | } |
| 708 | if (sect->flags & SEC_ALLOC) |
| 709 | { |
| 710 | hdr[indx].sh_flags |= SHF_ALLOC; |
| 711 | if (sect->flags & SEC_LOAD) |
| 712 | { |
| 713 | /* do something with sh_type ? */ |
| 714 | } |
| 715 | } |
| 716 | if (!(sect->flags & SEC_READONLY)) |
| 717 | hdr[indx].sh_flags |= SHF_WRITE; |
| 718 | |
| 719 | if (sect->flags & SEC_CODE) |
| 720 | hdr[indx].sh_flags |= SHF_EXECINSTR; |
| 721 | |
| 722 | return (true); |
| 723 | } |
| 724 | |
| 725 | /* Create a new bfd section from an ELF program header. |
| 726 | |
| 727 | Since program segments have no names, we generate a synthetic name |
| 728 | of the form segment<NUM>, where NUM is generally the index in the |
| 729 | program header table. For segments that are split (see below) we |
| 730 | generate the names segment<NUM>a and segment<NUM>b. |
| 731 | |
| 732 | Note that some program segments may have a file size that is different than |
| 733 | (less than) the memory size. All this means is that at execution the |
| 734 | system must allocate the amount of memory specified by the memory size, |
| 735 | but only initialize it with the first "file size" bytes read from the |
| 736 | file. This would occur for example, with program segments consisting |
| 737 | of combined data+bss. |
| 738 | |
| 739 | To handle the above situation, this routine generates TWO bfd sections |
| 740 | for the single program segment. The first has the length specified by |
| 741 | the file size of the segment, and the second has the length specified |
| 742 | by the difference between the two sizes. In effect, the segment is split |
| 743 | into it's initialized and uninitialized parts. |
| 744 | |
| 745 | */ |
| 746 | |
| 747 | static boolean |
| 748 | DEFUN(bfd_section_from_phdr, (abfd, hdr, index), |
| 749 | bfd *abfd AND |
| 750 | Elf_Internal_Phdr *hdr AND |
| 751 | int index) |
| 752 | { |
| 753 | asection *newsect; |
| 754 | char *name; |
| 755 | char namebuf[64]; |
| 756 | int split; |
| 757 | |
| 758 | split = ((hdr -> p_memsz > 0) && |
| 759 | (hdr -> p_filesz > 0) && |
| 760 | (hdr -> p_memsz > hdr -> p_filesz)); |
| 761 | sprintf (namebuf, split ? "segment%da" : "segment%d", index); |
| 762 | name = bfd_alloc (abfd, strlen (namebuf) + 1); |
| 763 | strcpy (name, namebuf); |
| 764 | newsect = bfd_make_section (abfd, name); |
| 765 | newsect -> vma = hdr -> p_vaddr; |
| 766 | newsect -> _raw_size = hdr -> p_filesz; |
| 767 | newsect -> filepos = hdr -> p_offset; |
| 768 | newsect -> flags |= SEC_HAS_CONTENTS; |
| 769 | if (hdr -> p_type == PT_LOAD) |
| 770 | { |
| 771 | newsect -> flags |= SEC_ALLOC; |
| 772 | newsect -> flags |= SEC_LOAD; |
| 773 | if (hdr -> p_flags & PF_X) |
| 774 | { |
| 775 | /* FIXME: all we known is that it has execute PERMISSION, |
| 776 | may be data. */ |
| 777 | newsect -> flags |= SEC_CODE; |
| 778 | } |
| 779 | } |
| 780 | if (!(hdr -> p_flags & PF_W)) |
| 781 | { |
| 782 | newsect -> flags |= SEC_READONLY; |
| 783 | } |
| 784 | |
| 785 | if (split) |
| 786 | { |
| 787 | sprintf (namebuf, "segment%db", index); |
| 788 | name = bfd_alloc (abfd, strlen (namebuf) + 1); |
| 789 | strcpy (name, namebuf); |
| 790 | newsect = bfd_make_section (abfd, name); |
| 791 | newsect -> vma = hdr -> p_vaddr + hdr -> p_filesz; |
| 792 | newsect -> _raw_size = hdr -> p_memsz - hdr -> p_filesz; |
| 793 | if (hdr -> p_type == PT_LOAD) |
| 794 | { |
| 795 | newsect -> flags |= SEC_ALLOC; |
| 796 | if (hdr -> p_flags & PF_X) |
| 797 | newsect -> flags |= SEC_CODE; |
| 798 | } |
| 799 | if (!(hdr -> p_flags & PF_W)) |
| 800 | newsect -> flags |= SEC_READONLY; |
| 801 | } |
| 802 | |
| 803 | return (true); |
| 804 | } |
| 805 | |
| 806 | #ifdef HAVE_PROCFS |
| 807 | |
| 808 | static void |
| 809 | DEFUN(bfd_prstatus,(abfd, descdata, descsz, filepos), |
| 810 | bfd *abfd AND |
| 811 | char *descdata AND |
| 812 | int descsz AND |
| 813 | long filepos) |
| 814 | { |
| 815 | asection *newsect; |
| 816 | prstatus_t *status = (prstatus_t *)0; |
| 817 | |
| 818 | if (descsz == sizeof (prstatus_t)) |
| 819 | { |
| 820 | newsect = bfd_make_section (abfd, ".reg"); |
| 821 | newsect -> _raw_size = sizeof (status->pr_reg); |
| 822 | newsect -> filepos = filepos + (long) &status->pr_reg; |
| 823 | newsect -> flags = SEC_ALLOC | SEC_HAS_CONTENTS; |
| 824 | newsect -> alignment_power = 2; |
| 825 | if ((core_prstatus (abfd) = bfd_alloc (abfd, descsz)) != NULL) |
| 826 | { |
| 827 | memcpy (core_prstatus (abfd), descdata, descsz); |
| 828 | } |
| 829 | } |
| 830 | } |
| 831 | |
| 832 | /* Stash a copy of the prpsinfo structure away for future use. */ |
| 833 | |
| 834 | static void |
| 835 | DEFUN(bfd_prpsinfo,(abfd, descdata, descsz, filepos), |
| 836 | bfd *abfd AND |
| 837 | char *descdata AND |
| 838 | int descsz AND |
| 839 | long filepos) |
| 840 | { |
| 841 | asection *newsect; |
| 842 | |
| 843 | if (descsz == sizeof (prpsinfo_t)) |
| 844 | { |
| 845 | if ((core_prpsinfo (abfd) = bfd_alloc (abfd, descsz)) != NULL) |
| 846 | { |
| 847 | memcpy (core_prpsinfo (abfd), descdata, descsz); |
| 848 | } |
| 849 | } |
| 850 | } |
| 851 | |
| 852 | static void |
| 853 | DEFUN(bfd_fpregset,(abfd, descdata, descsz, filepos), |
| 854 | bfd *abfd AND |
| 855 | char *descdata AND |
| 856 | int descsz AND |
| 857 | long filepos) |
| 858 | { |
| 859 | asection *newsect; |
| 860 | |
| 861 | newsect = bfd_make_section (abfd, ".reg2"); |
| 862 | newsect -> _raw_size = descsz; |
| 863 | newsect -> filepos = filepos; |
| 864 | newsect -> flags = SEC_ALLOC | SEC_HAS_CONTENTS; |
| 865 | newsect -> alignment_power = 2; |
| 866 | } |
| 867 | |
| 868 | #endif /* HAVE_PROCFS */ |
| 869 | |
| 870 | /* Return a pointer to the args (including the command name) that were |
| 871 | seen by the program that generated the core dump. Note that for |
| 872 | some reason, a spurious space is tacked onto the end of the args |
| 873 | in some (at least one anyway) implementations, so strip it off if |
| 874 | it exists. */ |
| 875 | |
| 876 | char * |
| 877 | DEFUN(elf_core_file_failing_command, (abfd), |
| 878 | bfd *abfd) |
| 879 | { |
| 880 | #ifdef HAVE_PROCFS |
| 881 | if (core_prpsinfo (abfd)) |
| 882 | { |
| 883 | prpsinfo_t *p = core_prpsinfo (abfd); |
| 884 | char *scan = p -> pr_psargs; |
| 885 | while (*scan++) {;} |
| 886 | scan -= 2; |
| 887 | if ((scan > p -> pr_psargs) && (*scan == ' ')) |
| 888 | { |
| 889 | *scan = '\000'; |
| 890 | } |
| 891 | return (p -> pr_psargs); |
| 892 | } |
| 893 | #endif |
| 894 | return (NULL); |
| 895 | } |
| 896 | |
| 897 | /* Return the number of the signal that caused the core dump. Presumably, |
| 898 | since we have a core file, we got a signal of some kind, so don't bother |
| 899 | checking the other process status fields, just return the signal number. |
| 900 | */ |
| 901 | |
| 902 | int |
| 903 | DEFUN(elf_core_file_failing_signal, (abfd), |
| 904 | bfd *abfd) |
| 905 | { |
| 906 | #ifdef HAVE_PROCFS |
| 907 | if (core_prstatus (abfd)) |
| 908 | { |
| 909 | return (((prstatus_t *)(core_prstatus (abfd))) -> pr_cursig); |
| 910 | } |
| 911 | #endif |
| 912 | return (-1); |
| 913 | } |
| 914 | |
| 915 | /* Check to see if the core file could reasonably be expected to have |
| 916 | come for the current executable file. Note that by default we return |
| 917 | true unless we find something that indicates that there might be a |
| 918 | problem. |
| 919 | */ |
| 920 | |
| 921 | boolean |
| 922 | DEFUN(elf_core_file_matches_executable_p, (core_bfd, exec_bfd), |
| 923 | bfd *core_bfd AND |
| 924 | bfd *exec_bfd) |
| 925 | { |
| 926 | #ifdef HAVE_PROCFS |
| 927 | char *corename; |
| 928 | char *execname; |
| 929 | #endif |
| 930 | |
| 931 | /* First, xvecs must match since both are ELF files for the same target. */ |
| 932 | |
| 933 | if (core_bfd->xvec != exec_bfd->xvec) |
| 934 | { |
| 935 | bfd_error = system_call_error; |
| 936 | return (false); |
| 937 | } |
| 938 | |
| 939 | #ifdef HAVE_PROCFS |
| 940 | |
| 941 | /* If no prpsinfo, just return true. Otherwise, grab the last component |
| 942 | of the exec'd pathname from the prpsinfo. */ |
| 943 | |
| 944 | if (core_prpsinfo (core_bfd)) |
| 945 | { |
| 946 | corename = (((struct prpsinfo *) core_prpsinfo (core_bfd)) -> pr_fname); |
| 947 | } |
| 948 | else |
| 949 | { |
| 950 | return (true); |
| 951 | } |
| 952 | |
| 953 | /* Find the last component of the executable pathname. */ |
| 954 | |
| 955 | if ((execname = strrchr (exec_bfd -> filename, '/')) != NULL) |
| 956 | { |
| 957 | execname++; |
| 958 | } |
| 959 | else |
| 960 | { |
| 961 | execname = (char *) exec_bfd -> filename; |
| 962 | } |
| 963 | |
| 964 | /* See if they match */ |
| 965 | |
| 966 | return (strcmp (execname, corename) ? false : true); |
| 967 | |
| 968 | #else |
| 969 | |
| 970 | return (true); |
| 971 | |
| 972 | #endif /* HAVE_PROCFS */ |
| 973 | } |
| 974 | |
| 975 | /* ELF core files contain a segment of type PT_NOTE, that holds much of |
| 976 | the information that would normally be available from the /proc interface |
| 977 | for the process, at the time the process dumped core. Currently this |
| 978 | includes copies of the prstatus, prpsinfo, and fpregset structures. |
| 979 | |
| 980 | Since these structures are potentially machine dependent in size and |
| 981 | ordering, bfd provides two levels of support for them. The first level, |
| 982 | available on all machines since it does not require that the host |
| 983 | have /proc support or the relevant include files, is to create a bfd |
| 984 | section for each of the prstatus, prpsinfo, and fpregset structures, |
| 985 | without any interpretation of their contents. With just this support, |
| 986 | the bfd client will have to interpret the structures itself. Even with |
| 987 | /proc support, it might want these full structures for it's own reasons. |
| 988 | |
| 989 | In the second level of support, where HAVE_PROCFS is defined, bfd will |
| 990 | pick apart the structures to gather some additional information that |
| 991 | clients may want, such as the general register set, the name of the |
| 992 | exec'ed file and its arguments, the signal (if any) that caused the |
| 993 | core dump, etc. |
| 994 | |
| 995 | */ |
| 996 | |
| 997 | static boolean |
| 998 | DEFUN(elf_corefile_note, (abfd, hdr), |
| 999 | bfd *abfd AND |
| 1000 | Elf_Internal_Phdr *hdr) |
| 1001 | { |
| 1002 | Elf_External_Note *x_note_p; /* Elf note, external form */ |
| 1003 | Elf_Internal_Note i_note; /* Elf note, internal form */ |
| 1004 | char *buf = NULL; /* Entire note segment contents */ |
| 1005 | char *namedata; /* Name portion of the note */ |
| 1006 | char *descdata; /* Descriptor portion of the note */ |
| 1007 | char *sectname; /* Name to use for new section */ |
| 1008 | long filepos; /* File offset to descriptor data */ |
| 1009 | asection *newsect; |
| 1010 | |
| 1011 | if (hdr -> p_filesz > 0 |
| 1012 | && (buf = (char *) bfd_xmalloc (hdr -> p_filesz)) != NULL |
| 1013 | && bfd_seek (abfd, hdr -> p_offset, SEEK_SET) != -1 |
| 1014 | && bfd_read ((PTR) buf, hdr -> p_filesz, 1, abfd) == hdr -> p_filesz) |
| 1015 | { |
| 1016 | x_note_p = (Elf_External_Note *) buf; |
| 1017 | while ((char *) x_note_p < (buf + hdr -> p_filesz)) |
| 1018 | { |
| 1019 | i_note.namesz = bfd_h_get_32 (abfd, (bfd_byte *) x_note_p -> namesz); |
| 1020 | i_note.descsz = bfd_h_get_32 (abfd, (bfd_byte *) x_note_p -> descsz); |
| 1021 | i_note.type = bfd_h_get_32 (abfd, (bfd_byte *) x_note_p -> type); |
| 1022 | namedata = x_note_p -> name; |
| 1023 | descdata = namedata + BFD_ALIGN (i_note.namesz, 4); |
| 1024 | filepos = hdr -> p_offset + (descdata - buf); |
| 1025 | switch (i_note.type) { |
| 1026 | case NT_PRSTATUS: |
| 1027 | /* process descdata as prstatus info */ |
| 1028 | bfd_prstatus (abfd, descdata, i_note.descsz, filepos); |
| 1029 | sectname = ".prstatus"; |
| 1030 | break; |
| 1031 | case NT_FPREGSET: |
| 1032 | /* process descdata as fpregset info */ |
| 1033 | bfd_fpregset (abfd, descdata, i_note.descsz, filepos); |
| 1034 | sectname = ".fpregset"; |
| 1035 | break; |
| 1036 | case NT_PRPSINFO: |
| 1037 | /* process descdata as prpsinfo */ |
| 1038 | bfd_prpsinfo (abfd, descdata, i_note.descsz, filepos); |
| 1039 | sectname = ".prpsinfo"; |
| 1040 | break; |
| 1041 | default: |
| 1042 | /* Unknown descriptor, just ignore it. */ |
| 1043 | sectname = NULL; |
| 1044 | break; |
| 1045 | } |
| 1046 | if (sectname != NULL) |
| 1047 | { |
| 1048 | newsect = bfd_make_section (abfd, sectname); |
| 1049 | newsect -> _raw_size = i_note.descsz; |
| 1050 | newsect -> filepos = filepos; |
| 1051 | newsect -> flags = SEC_ALLOC | SEC_HAS_CONTENTS; |
| 1052 | newsect -> alignment_power = 2; |
| 1053 | } |
| 1054 | x_note_p = (Elf_External_Note *) |
| 1055 | (descdata + BFD_ALIGN (i_note.descsz, 4)); |
| 1056 | } |
| 1057 | } |
| 1058 | if (buf != NULL) |
| 1059 | { |
| 1060 | free (buf); |
| 1061 | } |
| 1062 | return true; |
| 1063 | |
| 1064 | } |
| 1065 | |
| 1066 | |
| 1067 | /* Read a specified number of bytes at a specified offset in an ELF |
| 1068 | file, into a newly allocated buffer, and return a pointer to the |
| 1069 | buffer. */ |
| 1070 | |
| 1071 | static char * |
| 1072 | DEFUN(elf_read, (abfd, offset, size), |
| 1073 | bfd *abfd AND |
| 1074 | long offset AND |
| 1075 | int size) |
| 1076 | { |
| 1077 | char *buf; |
| 1078 | |
| 1079 | if ((buf = bfd_alloc (abfd, size)) == NULL) |
| 1080 | { |
| 1081 | bfd_error = no_memory; |
| 1082 | return (NULL); |
| 1083 | } |
| 1084 | if (bfd_seek (abfd, offset, SEEK_SET) == -1) |
| 1085 | { |
| 1086 | bfd_error = system_call_error; |
| 1087 | return (NULL); |
| 1088 | } |
| 1089 | if (bfd_read ((PTR) buf, size, 1, abfd) != size) |
| 1090 | { |
| 1091 | bfd_error = system_call_error; |
| 1092 | return (NULL); |
| 1093 | } |
| 1094 | return (buf); |
| 1095 | } |
| 1096 | |
| 1097 | /* Begin processing a given object. |
| 1098 | |
| 1099 | First we validate the file by reading in the ELF header and checking |
| 1100 | the magic number. |
| 1101 | |
| 1102 | */ |
| 1103 | |
| 1104 | static boolean |
| 1105 | DEFUN (elf_file_p, (x_ehdrp), Elf_External_Ehdr *x_ehdrp) |
| 1106 | { |
| 1107 | return ((x_ehdrp->e_ident[EI_MAG0] == ELFMAG0) |
| 1108 | && (x_ehdrp->e_ident[EI_MAG1] == ELFMAG1) |
| 1109 | && (x_ehdrp->e_ident[EI_MAG2] == ELFMAG2) |
| 1110 | && (x_ehdrp->e_ident[EI_MAG3] == ELFMAG3)); |
| 1111 | } |
| 1112 | |
| 1113 | bfd_target * |
| 1114 | DEFUN (elf_object_p, (abfd), bfd *abfd) |
| 1115 | { |
| 1116 | Elf_External_Ehdr x_ehdr; /* Elf file header, external form */ |
| 1117 | Elf_Internal_Ehdr *i_ehdrp; /* Elf file header, internal form */ |
| 1118 | Elf_External_Shdr x_shdr; /* Section header table entry, external form */ |
| 1119 | Elf_Internal_Shdr *i_shdrp; /* Section header table, internal form */ |
| 1120 | int shindex; |
| 1121 | char *shstrtab; /* Internal copy of section header stringtab */ |
| 1122 | struct elf_backend_data *ebd; /* Use to get ELF_ARCH stored in xvec */ |
| 1123 | |
| 1124 | /* Read in the ELF header in external format. */ |
| 1125 | |
| 1126 | if (bfd_read ((PTR) &x_ehdr, sizeof (x_ehdr), 1, abfd) != sizeof (x_ehdr)) |
| 1127 | { |
| 1128 | bfd_error = system_call_error; |
| 1129 | return (NULL); |
| 1130 | } |
| 1131 | |
| 1132 | /* Now check to see if we have a valid ELF file, and one that BFD can |
| 1133 | make use of. The magic number must match, the address size ('class') |
| 1134 | and byte-swapping must match our XVEC entry, and it must have a |
| 1135 | section header table (FIXME: See comments re sections at top of this |
| 1136 | file). */ |
| 1137 | |
| 1138 | if (elf_file_p (&x_ehdr) == false) |
| 1139 | { |
| 1140 | wrong: |
| 1141 | bfd_error = wrong_format; |
| 1142 | return (NULL); |
| 1143 | } |
| 1144 | |
| 1145 | /* FIXME, Check EI_VERSION here ! */ |
| 1146 | |
| 1147 | switch (x_ehdr.e_ident[EI_CLASS]) |
| 1148 | { |
| 1149 | case ELFCLASSNONE: /* address size not specified */ |
| 1150 | goto wrong; /* No support if can't tell address size */ |
| 1151 | case ELFCLASS32: /* 32-bit addresses */ |
| 1152 | break; |
| 1153 | case ELFCLASS64: /* 64-bit addresses */ |
| 1154 | goto wrong; /* FIXME: 64 bits not yet supported */ |
| 1155 | default: |
| 1156 | goto wrong; /* No support if unknown address class */ |
| 1157 | } |
| 1158 | |
| 1159 | /* Switch xvec to match the specified byte order. */ |
| 1160 | switch (x_ehdr.e_ident[EI_DATA]) |
| 1161 | { |
| 1162 | case ELFDATA2MSB: /* Big-endian */ |
| 1163 | if (!abfd->xvec->header_byteorder_big_p) |
| 1164 | goto wrong; |
| 1165 | break; |
| 1166 | case ELFDATA2LSB: /* Little-endian */ |
| 1167 | if (abfd->xvec->header_byteorder_big_p) |
| 1168 | goto wrong; |
| 1169 | break; |
| 1170 | case ELFDATANONE: /* No data encoding specified */ |
| 1171 | default: /* Unknown data encoding specified */ |
| 1172 | goto wrong; |
| 1173 | } |
| 1174 | |
| 1175 | /* Allocate an instance of the elf_obj_tdata structure and hook it up to |
| 1176 | the tdata pointer in the bfd. */ |
| 1177 | |
| 1178 | if (NULL == (elf_tdata (abfd) = (struct elf_obj_tdata *) |
| 1179 | bfd_zalloc (abfd, sizeof (struct elf_obj_tdata)))) |
| 1180 | { |
| 1181 | bfd_error = no_memory; |
| 1182 | return (NULL); |
| 1183 | } |
| 1184 | |
| 1185 | /* FIXME: Any `wrong' exits below here will leak memory (tdata). */ |
| 1186 | |
| 1187 | /* Now that we know the byte order, swap in the rest of the header */ |
| 1188 | i_ehdrp = elf_elfheader (abfd); |
| 1189 | elf_swap_ehdr_in (abfd, &x_ehdr, i_ehdrp); |
| 1190 | |
| 1191 | /* If there is no section header table, we're hosed. */ |
| 1192 | if (i_ehdrp->e_shoff == 0) |
| 1193 | goto wrong; |
| 1194 | |
| 1195 | if (i_ehdrp->e_type == ET_EXEC || i_ehdrp->e_type == ET_DYN) |
| 1196 | abfd -> flags |= EXEC_P; |
| 1197 | |
| 1198 | /* Retrieve the architecture information from the xvec and verify |
| 1199 | that it matches the machine info stored in the ELF header. |
| 1200 | This allows us to resolve ambiguous formats that might not |
| 1201 | otherwise be distinguishable. */ |
| 1202 | |
| 1203 | ebd = (struct elf_backend_data *) (abfd->xvec->backend_data); |
| 1204 | switch (i_ehdrp->e_machine) |
| 1205 | { |
| 1206 | case EM_NONE: |
| 1207 | case EM_M32: /* or should this be bfd_arch_obscure? */ |
| 1208 | if (ebd -> arch != bfd_arch_unknown) |
| 1209 | goto wrong; |
| 1210 | bfd_default_set_arch_mach(abfd, bfd_arch_unknown, 0); |
| 1211 | break; |
| 1212 | case EM_SPARC: |
| 1213 | if (ebd -> arch != bfd_arch_sparc) |
| 1214 | goto wrong; |
| 1215 | bfd_default_set_arch_mach(abfd, bfd_arch_sparc, 0); |
| 1216 | break; |
| 1217 | case EM_386: |
| 1218 | if (ebd -> arch != bfd_arch_i386) |
| 1219 | goto wrong; |
| 1220 | bfd_default_set_arch_mach(abfd, bfd_arch_i386, 0); |
| 1221 | break; |
| 1222 | case EM_68K: |
| 1223 | if (ebd -> arch != bfd_arch_m68k) |
| 1224 | goto wrong; |
| 1225 | bfd_default_set_arch_mach(abfd, bfd_arch_m68k, 0); |
| 1226 | break; |
| 1227 | case EM_88K: |
| 1228 | if (ebd -> arch != bfd_arch_m88k) |
| 1229 | goto wrong; |
| 1230 | bfd_default_set_arch_mach(abfd, bfd_arch_m88k, 0); |
| 1231 | break; |
| 1232 | case EM_860: |
| 1233 | if (ebd -> arch != bfd_arch_i860) |
| 1234 | goto wrong; |
| 1235 | bfd_default_set_arch_mach(abfd, bfd_arch_i860, 0); |
| 1236 | break; |
| 1237 | case EM_MIPS: |
| 1238 | if (ebd -> arch != bfd_arch_mips) |
| 1239 | goto wrong; |
| 1240 | bfd_default_set_arch_mach(abfd, bfd_arch_mips, 0); |
| 1241 | break; |
| 1242 | case EM_HPPA: |
| 1243 | if (ebd -> arch != bfd_arch_hppa) |
| 1244 | goto wrong; |
| 1245 | bfd_default_set_arch_mach (abfd, bfd_arch_hppa, 0); |
| 1246 | break; |
| 1247 | default: |
| 1248 | goto wrong; |
| 1249 | } |
| 1250 | |
| 1251 | /* Allocate space for a copy of the section header table in |
| 1252 | internal form, seek to the section header table in the file, |
| 1253 | read it in, and convert it to internal form. As a simple sanity |
| 1254 | check, verify that the what BFD thinks is the size of each section |
| 1255 | header table entry actually matches the size recorded in the file. */ |
| 1256 | |
| 1257 | if (i_ehdrp->e_shentsize != sizeof (x_shdr)) |
| 1258 | goto wrong; |
| 1259 | i_shdrp = (Elf_Internal_Shdr *) |
| 1260 | bfd_alloc (abfd, sizeof (*i_shdrp) * i_ehdrp->e_shnum); |
| 1261 | if (! i_shdrp) |
| 1262 | { |
| 1263 | bfd_error = no_memory; |
| 1264 | return (NULL); |
| 1265 | } |
| 1266 | if (bfd_seek (abfd, i_ehdrp->e_shoff, SEEK_SET) == -1) |
| 1267 | { |
| 1268 | bfd_error = system_call_error; |
| 1269 | return (NULL); |
| 1270 | } |
| 1271 | for (shindex = 0; shindex < i_ehdrp->e_shnum; shindex++) |
| 1272 | { |
| 1273 | if (bfd_read ((PTR) &x_shdr, sizeof x_shdr, 1, abfd) |
| 1274 | != sizeof (x_shdr)) |
| 1275 | { |
| 1276 | bfd_error = system_call_error; |
| 1277 | return (NULL); |
| 1278 | } |
| 1279 | elf_swap_shdr_in (abfd, &x_shdr, i_shdrp + shindex); |
| 1280 | } |
| 1281 | |
| 1282 | elf_elfsections (abfd) = i_shdrp; |
| 1283 | |
| 1284 | /* Read in the string table containing the names of the sections. We |
| 1285 | will need the base pointer to this table later. */ |
| 1286 | /* We read this inline now, so that we don't have to go through |
| 1287 | bfd_section_from_shdr with it (since this particular strtab is |
| 1288 | used to find all of the ELF section names.) */ |
| 1289 | |
| 1290 | shstrtab = elf_get_str_section (abfd, i_ehdrp->e_shstrndx); |
| 1291 | if (! shstrtab) |
| 1292 | return (NULL); |
| 1293 | |
| 1294 | /* Once all of the section headers have been read and converted, we |
| 1295 | can start processing them. Note that the first section header is |
| 1296 | a dummy placeholder entry, so we ignore it. |
| 1297 | |
| 1298 | We also watch for the symbol table section and remember the file |
| 1299 | offset and section size for both the symbol table section and the |
| 1300 | associated string table section. */ |
| 1301 | |
| 1302 | for (shindex = 1; shindex < i_ehdrp->e_shnum; shindex++) |
| 1303 | { |
| 1304 | bfd_section_from_shdr (abfd, shindex); |
| 1305 | } |
| 1306 | |
| 1307 | /* Remember the entry point specified in the ELF file header. */ |
| 1308 | |
| 1309 | bfd_get_start_address (abfd) = i_ehdrp->e_entry; |
| 1310 | |
| 1311 | return (abfd->xvec); |
| 1312 | } |
| 1313 | |
| 1314 | /* |
| 1315 | Takes a bfd and a symbol, returns a pointer to the elf specific area |
| 1316 | of the symbol if there is one. |
| 1317 | */ |
| 1318 | static elf_symbol_type * |
| 1319 | DEFUN(elf_symbol_from,(ignore_abfd, symbol), |
| 1320 | bfd *ignore_abfd AND |
| 1321 | asymbol *symbol) |
| 1322 | { |
| 1323 | if (symbol->the_bfd->xvec->flavour != bfd_target_elf_flavour) |
| 1324 | return (elf_symbol_type *)NULL; |
| 1325 | |
| 1326 | if (symbol->the_bfd->tdata.elf_obj_data == (struct elf_obj_tdata *)NULL) |
| 1327 | return (elf_symbol_type *)NULL; |
| 1328 | |
| 1329 | return (elf_symbol_type *) symbol; |
| 1330 | } |
| 1331 | |
| 1332 | /* Core files are simply standard ELF formatted files that partition |
| 1333 | the file using the execution view of the file (program header table) |
| 1334 | rather than the linking view. In fact, there is no section header |
| 1335 | table in a core file. |
| 1336 | |
| 1337 | The process status information (including the contents of the general |
| 1338 | register set) and the floating point register set are stored in a |
| 1339 | segment of type PT_NOTE. We handcraft a couple of extra bfd sections |
| 1340 | that allow standard bfd access to the general registers (.reg) and the |
| 1341 | floating point registers (.reg2). |
| 1342 | |
| 1343 | */ |
| 1344 | |
| 1345 | bfd_target * |
| 1346 | DEFUN (elf_core_file_p, (abfd), bfd *abfd) |
| 1347 | { |
| 1348 | Elf_External_Ehdr x_ehdr; /* Elf file header, external form */ |
| 1349 | Elf_Internal_Ehdr *i_ehdrp; /* Elf file header, internal form */ |
| 1350 | Elf_External_Phdr x_phdr; /* Program header table entry, external form */ |
| 1351 | Elf_Internal_Phdr *i_phdrp; /* Program header table, internal form */ |
| 1352 | unsigned int phindex; |
| 1353 | |
| 1354 | /* Read in the ELF header in external format. */ |
| 1355 | |
| 1356 | if (bfd_read ((PTR) &x_ehdr, sizeof (x_ehdr), 1, abfd) != sizeof (x_ehdr)) |
| 1357 | { |
| 1358 | bfd_error = system_call_error; |
| 1359 | return (NULL); |
| 1360 | } |
| 1361 | |
| 1362 | /* Now check to see if we have a valid ELF file, and one that BFD can |
| 1363 | make use of. The magic number must match, the address size ('class') |
| 1364 | and byte-swapping must match our XVEC entry, and it must have a |
| 1365 | program header table (FIXME: See comments re segments at top of this |
| 1366 | file). */ |
| 1367 | |
| 1368 | if (elf_file_p (&x_ehdr) == false) |
| 1369 | { |
| 1370 | wrong: |
| 1371 | bfd_error = wrong_format; |
| 1372 | return (NULL); |
| 1373 | } |
| 1374 | |
| 1375 | /* FIXME, Check EI_VERSION here ! */ |
| 1376 | |
| 1377 | switch (x_ehdr.e_ident[EI_CLASS]) |
| 1378 | { |
| 1379 | case ELFCLASSNONE: /* address size not specified */ |
| 1380 | goto wrong; /* No support if can't tell address size */ |
| 1381 | case ELFCLASS32: /* 32-bit addresses */ |
| 1382 | break; |
| 1383 | case ELFCLASS64: /* 64-bit addresses */ |
| 1384 | goto wrong; /* FIXME: 64 bits not yet supported */ |
| 1385 | default: |
| 1386 | goto wrong; /* No support if unknown address class */ |
| 1387 | } |
| 1388 | |
| 1389 | /* Switch xvec to match the specified byte order. */ |
| 1390 | switch (x_ehdr.e_ident[EI_DATA]) |
| 1391 | { |
| 1392 | case ELFDATA2MSB: /* Big-endian */ |
| 1393 | if (abfd->xvec->byteorder_big_p == false) |
| 1394 | goto wrong; |
| 1395 | break; |
| 1396 | case ELFDATA2LSB: /* Little-endian */ |
| 1397 | if (abfd->xvec->byteorder_big_p == true) |
| 1398 | goto wrong; |
| 1399 | break; |
| 1400 | case ELFDATANONE: /* No data encoding specified */ |
| 1401 | default: /* Unknown data encoding specified */ |
| 1402 | goto wrong; |
| 1403 | } |
| 1404 | |
| 1405 | /* Allocate an instance of the elf_obj_tdata structure and hook it up to |
| 1406 | the tdata pointer in the bfd. */ |
| 1407 | |
| 1408 | elf_tdata (abfd) = |
| 1409 | (struct elf_obj_tdata *) bfd_zalloc (abfd, sizeof (struct elf_obj_tdata)); |
| 1410 | if (elf_tdata (abfd) == NULL) |
| 1411 | { |
| 1412 | bfd_error = no_memory; |
| 1413 | return (NULL); |
| 1414 | } |
| 1415 | |
| 1416 | /* FIXME, `wrong' returns from this point onward, leak memory. */ |
| 1417 | |
| 1418 | /* Now that we know the byte order, swap in the rest of the header */ |
| 1419 | i_ehdrp = elf_elfheader (abfd); |
| 1420 | elf_swap_ehdr_in (abfd, &x_ehdr, i_ehdrp); |
| 1421 | |
| 1422 | /* If there is no program header, or the type is not a core file, then |
| 1423 | we are hosed. */ |
| 1424 | if (i_ehdrp->e_phoff == 0 || i_ehdrp->e_type != ET_CORE) |
| 1425 | goto wrong; |
| 1426 | |
| 1427 | /* Allocate space for a copy of the program header table in |
| 1428 | internal form, seek to the program header table in the file, |
| 1429 | read it in, and convert it to internal form. As a simple sanity |
| 1430 | check, verify that the what BFD thinks is the size of each program |
| 1431 | header table entry actually matches the size recorded in the file. */ |
| 1432 | |
| 1433 | if (i_ehdrp->e_phentsize != sizeof (x_phdr)) |
| 1434 | goto wrong; |
| 1435 | i_phdrp = (Elf_Internal_Phdr *) |
| 1436 | bfd_alloc (abfd, sizeof (*i_phdrp) * i_ehdrp->e_phnum); |
| 1437 | if (! i_phdrp) |
| 1438 | { |
| 1439 | bfd_error = no_memory; |
| 1440 | return (NULL); |
| 1441 | } |
| 1442 | if (bfd_seek (abfd, i_ehdrp->e_phoff, SEEK_SET) == -1) |
| 1443 | { |
| 1444 | bfd_error = system_call_error; |
| 1445 | return (NULL); |
| 1446 | } |
| 1447 | for (phindex = 0; phindex < i_ehdrp->e_phnum; phindex++) |
| 1448 | { |
| 1449 | if (bfd_read ((PTR) &x_phdr, sizeof (x_phdr), 1, abfd) |
| 1450 | != sizeof (x_phdr)) |
| 1451 | { |
| 1452 | bfd_error = system_call_error; |
| 1453 | return (NULL); |
| 1454 | } |
| 1455 | elf_swap_phdr_in (abfd, &x_phdr, i_phdrp + phindex); |
| 1456 | } |
| 1457 | |
| 1458 | /* Once all of the program headers have been read and converted, we |
| 1459 | can start processing them. */ |
| 1460 | |
| 1461 | for (phindex = 0; phindex < i_ehdrp->e_phnum; phindex++) |
| 1462 | { |
| 1463 | bfd_section_from_phdr (abfd, i_phdrp + phindex, phindex); |
| 1464 | if ((i_phdrp + phindex) -> p_type == PT_NOTE) |
| 1465 | { |
| 1466 | elf_corefile_note (abfd, i_phdrp + phindex); |
| 1467 | } |
| 1468 | } |
| 1469 | |
| 1470 | /* Remember the entry point specified in the ELF file header. */ |
| 1471 | |
| 1472 | bfd_get_start_address (abfd) = i_ehdrp->e_entry; |
| 1473 | |
| 1474 | return (abfd->xvec); |
| 1475 | } |
| 1476 | |
| 1477 | boolean |
| 1478 | DEFUN (elf_mkobject, (abfd), bfd *abfd) |
| 1479 | { |
| 1480 | /* this just does initialization */ |
| 1481 | /* coff_mkobject zalloc's space for tdata.coff_obj_data ... */ |
| 1482 | elf_tdata(abfd) = (struct elf_obj_tdata *) |
| 1483 | bfd_zalloc (abfd, sizeof(struct elf_obj_tdata)); |
| 1484 | if (elf_tdata(abfd) == 0) { |
| 1485 | bfd_error = no_memory; |
| 1486 | return false; |
| 1487 | } |
| 1488 | /* since everything is done at close time, do we need any |
| 1489 | initialization? */ |
| 1490 | |
| 1491 | return (true); |
| 1492 | } |
| 1493 | |
| 1494 | /* |
| 1495 | Create ELF output from BFD sections. |
| 1496 | |
| 1497 | Essentially, just create the section header and forget about the program |
| 1498 | header for now. |
| 1499 | |
| 1500 | */ |
| 1501 | |
| 1502 | /* lacking nested functions and nested types, set up for mapping over |
| 1503 | BFD sections to produce ELF sections */ |
| 1504 | |
| 1505 | typedef struct { |
| 1506 | Elf_Internal_Ehdr *i_ehdr; |
| 1507 | Elf_Internal_Shdr *i_shdrp; |
| 1508 | struct strtab *shstrtab; |
| 1509 | int symtab_section; |
| 1510 | } elf_sect_thunk; |
| 1511 | |
| 1512 | static int |
| 1513 | elf_idx_of_sym(abfd, sym) |
| 1514 | bfd *abfd; |
| 1515 | asymbol *sym; |
| 1516 | { |
| 1517 | int i; |
| 1518 | for ( i = 0; i < abfd->symcount; i++ ) |
| 1519 | { |
| 1520 | if ( sym == (asymbol *)abfd->outsymbols[i] ) |
| 1521 | { |
| 1522 | /* sanity check */ |
| 1523 | BFD_ASSERT( (strcmp(sym->name, abfd->outsymbols[i]->name) == 0) |
| 1524 | || (strlen(sym->name) == 0) ); |
| 1525 | return i+1; |
| 1526 | } |
| 1527 | } |
| 1528 | return 0; |
| 1529 | } |
| 1530 | |
| 1531 | static void |
| 1532 | DEFUN (elf_make_sections, (abfd, asect, obj), |
| 1533 | bfd *abfd AND |
| 1534 | asection *asect AND |
| 1535 | PTR obj) |
| 1536 | { |
| 1537 | elf_sect_thunk *thunk = (elf_sect_thunk*)obj; |
| 1538 | /* most of what is in bfd_shdr_from_section goes in here... */ |
| 1539 | /* and all of these sections generate at *least* one ELF section. */ |
| 1540 | int this_section; |
| 1541 | int idx; |
| 1542 | |
| 1543 | /* check if we're making a PROGBITS section... */ |
| 1544 | /* if ((asect->flags & SEC_ALLOC) && (asect->flags & SEC_LOAD)) */ |
| 1545 | /* this was too strict... what *do* we want to check here? */ |
| 1546 | if (1) |
| 1547 | { |
| 1548 | Elf_Internal_Shdr *this_hdr; |
| 1549 | this_section = elf_section_from_bfd_section (abfd, asect); |
| 1550 | this_hdr = &thunk->i_shdrp[this_section]; |
| 1551 | |
| 1552 | this_hdr->sh_addr = asect->vma; |
| 1553 | this_hdr->sh_size = asect->_raw_size; |
| 1554 | /* contents already set by elf_set_section_contents */ |
| 1555 | |
| 1556 | if (asect->flags & SEC_RELOC) |
| 1557 | { |
| 1558 | /* emit a reloc section, and thus strtab and symtab... */ |
| 1559 | Elf_Internal_Shdr *rela_hdr; |
| 1560 | Elf_Internal_Shdr *symtab_hdr; |
| 1561 | Elf_External_Rela *outbound_relocs; |
| 1562 | int rela_section; |
| 1563 | |
| 1564 | symtab_hdr = &thunk->i_shdrp[thunk->symtab_section]; |
| 1565 | |
| 1566 | if (thunk->symtab_section == this_section + 1) |
| 1567 | rela_section = thunk->symtab_section + 2; /* symtab + symstrtab */ |
| 1568 | else |
| 1569 | rela_section = this_section + 1; |
| 1570 | rela_hdr = &thunk->i_shdrp[rela_section]; |
| 1571 | rela_hdr->sh_type = SHT_RELA; |
| 1572 | rela_hdr->sh_link = thunk->symtab_section; |
| 1573 | rela_hdr->sh_info = this_section; |
| 1574 | rela_hdr->sh_entsize = sizeof (Elf_External_Rela); |
| 1575 | /* orelocation has the data, reloc_count has the count... */ |
| 1576 | rela_hdr->sh_size = rela_hdr->sh_entsize * asect->reloc_count; |
| 1577 | outbound_relocs = (Elf_External_Rela *) |
| 1578 | bfd_alloc(abfd, asect->reloc_count * sizeof(Elf_External_Rela)); |
| 1579 | for (idx = 0; idx < asect->reloc_count; idx++) |
| 1580 | { |
| 1581 | Elf_Internal_Rela dst; |
| 1582 | arelent *ptr; |
| 1583 | Elf_External_Rela *src; |
| 1584 | |
| 1585 | ptr = asect->orelocation[idx]; |
| 1586 | src = outbound_relocs + idx; |
| 1587 | if (asect->flags & SEC_RELOC) |
| 1588 | dst.r_offset = ptr->address - asect->vma; |
| 1589 | else |
| 1590 | dst.r_offset = ptr->address; |
| 1591 | |
| 1592 | /* @@ This assumes the symbols were written (or will be |
| 1593 | written) in the same order that they appear in |
| 1594 | abfd->outsymbols. */ |
| 1595 | if (ptr->sym_ptr_ptr && ptr->sym_ptr_ptr[0]) |
| 1596 | dst.r_info = ELF_R_INFO (elf_idx_of_sym (abfd, |
| 1597 | ptr->sym_ptr_ptr[0]), |
| 1598 | ptr->howto->type); |
| 1599 | else |
| 1600 | dst.r_info = ELF_R_INFO (STN_UNDEF, ptr->howto->type); |
| 1601 | |
| 1602 | dst.r_addend = ptr->addend; |
| 1603 | elf_swap_reloca_out(abfd, &dst, src); |
| 1604 | } |
| 1605 | rela_hdr->contents = (void*)outbound_relocs; |
| 1606 | } |
| 1607 | if (asect->flags & SEC_ALLOC) |
| 1608 | { |
| 1609 | this_hdr->sh_flags |= SHF_ALLOC; |
| 1610 | if (asect->flags & SEC_LOAD) |
| 1611 | { |
| 1612 | /* @@ Do something with sh_type? */ |
| 1613 | } |
| 1614 | } |
| 1615 | if (!(asect->flags & SEC_READONLY)) |
| 1616 | this_hdr->sh_flags |= SHF_WRITE; |
| 1617 | |
| 1618 | if (asect->flags & SEC_CODE) |
| 1619 | this_hdr->sh_flags |= SHF_EXECINSTR; |
| 1620 | } |
| 1621 | } |
| 1622 | |
| 1623 | static void |
| 1624 | DEFUN (elf_fake_sections, (abfd, asect, obj), |
| 1625 | bfd *abfd AND |
| 1626 | asection *asect AND |
| 1627 | PTR obj) |
| 1628 | { |
| 1629 | elf_sect_thunk *thunk = (elf_sect_thunk*)obj; |
| 1630 | /* most of what is in bfd_shdr_from_section goes in here... */ |
| 1631 | /* and all of these sections generate at *least* one ELF section. */ |
| 1632 | int this_section; |
| 1633 | |
| 1634 | /* check if we're making a PROGBITS section... */ |
| 1635 | /* if ((asect->flags & SEC_ALLOC) && (asect->flags & SEC_LOAD)) */ |
| 1636 | /* this was too strict... what *do* we want to check here? */ |
| 1637 | if (1) |
| 1638 | { |
| 1639 | Elf_Internal_Shdr *this_hdr; |
| 1640 | this_section = thunk->i_ehdr->e_shnum++; |
| 1641 | this_hdr = &thunk->i_shdrp[this_section]; |
| 1642 | this_hdr->sh_name = |
| 1643 | bfd_add_to_strtab (abfd, thunk->shstrtab, asect->name); |
| 1644 | /* we need to log the type *now* so that elf_section_from_bfd_section |
| 1645 | can find us... have to set rawdata too. */ |
| 1646 | this_hdr->rawdata = (void*)asect; |
| 1647 | if ((asect->flags & SEC_ALLOC) && (asect->flags & SEC_LOAD)) |
| 1648 | this_hdr->sh_type = SHT_PROGBITS; |
| 1649 | /* @@ Select conditions correctly! */ |
| 1650 | else if (!strcmp (asect->name, ".bss")) |
| 1651 | this_hdr->sh_type = SHT_NOBITS; |
| 1652 | else |
| 1653 | /* what *do* we put here? */ |
| 1654 | this_hdr->sh_type = SHT_PROGBITS; |
| 1655 | |
| 1656 | |
| 1657 | { |
| 1658 | /* Emit a strtab and symtab, and possibly a reloc section. */ |
| 1659 | Elf_Internal_Shdr *rela_hdr; |
| 1660 | Elf_Internal_Shdr *symtab_hdr; |
| 1661 | Elf_Internal_Shdr *symstrtab_hdr; |
| 1662 | int rela_section; |
| 1663 | int symstrtab_section; |
| 1664 | |
| 1665 | /* Note that only one symtab is used, so just remember it |
| 1666 | for now. */ |
| 1667 | if (! thunk->symtab_section) |
| 1668 | { |
| 1669 | thunk->symtab_section = thunk->i_ehdr->e_shnum++; |
| 1670 | symtab_hdr = &thunk->i_shdrp[thunk->symtab_section]; |
| 1671 | symtab_hdr->sh_name = |
| 1672 | bfd_add_to_strtab (abfd, thunk->shstrtab, ".symtab"); |
| 1673 | symtab_hdr->sh_type = SHT_SYMTAB; |
| 1674 | symtab_hdr->sh_entsize = sizeof (Elf_External_Sym); |
| 1675 | |
| 1676 | symstrtab_section = thunk->i_ehdr->e_shnum++; |
| 1677 | BFD_ASSERT(symstrtab_section == thunk->symtab_section+1); |
| 1678 | symstrtab_hdr = &thunk->i_shdrp[symstrtab_section]; |
| 1679 | symtab_hdr->sh_link = symstrtab_section; |
| 1680 | symstrtab_hdr->sh_name = |
| 1681 | bfd_add_to_strtab (abfd, thunk->shstrtab, ".strtab"); |
| 1682 | symstrtab_hdr->sh_type = SHT_STRTAB; |
| 1683 | |
| 1684 | symtab_hdr->contents = 0; |
| 1685 | symstrtab_hdr->contents = 0; |
| 1686 | symstrtab_hdr->sh_size = 0; |
| 1687 | } |
| 1688 | else |
| 1689 | symtab_hdr = &thunk->i_shdrp[thunk->symtab_section]; |
| 1690 | |
| 1691 | if (asect->flags & SEC_RELOC) |
| 1692 | { |
| 1693 | rela_section = thunk->i_ehdr->e_shnum++; |
| 1694 | rela_hdr = &thunk->i_shdrp[rela_section]; |
| 1695 | rela_hdr->sh_name = |
| 1696 | bfd_add_2_to_strtab (abfd, thunk->shstrtab, ".rela", |
| 1697 | asect->name); |
| 1698 | rela_hdr->sh_type = SHT_RELA; |
| 1699 | rela_hdr->sh_link = thunk->symtab_section; |
| 1700 | rela_hdr->sh_info = this_section; |
| 1701 | rela_hdr->sh_entsize = sizeof (Elf_External_Rela); |
| 1702 | } |
| 1703 | } |
| 1704 | if (asect->flags & SEC_ALLOC) |
| 1705 | { |
| 1706 | this_hdr->sh_flags |= SHF_ALLOC; |
| 1707 | if (asect->flags & SEC_LOAD) |
| 1708 | { |
| 1709 | /* @@ Do something with sh_type? */ |
| 1710 | } |
| 1711 | } |
| 1712 | if (!(asect->flags & SEC_READONLY)) |
| 1713 | this_hdr->sh_flags |= SHF_WRITE; |
| 1714 | if (asect->flags & SEC_CODE) |
| 1715 | this_hdr->sh_flags |= SHF_EXECINSTR; |
| 1716 | } |
| 1717 | } |
| 1718 | |
| 1719 | |
| 1720 | static boolean |
| 1721 | DEFUN (elf_compute_section_file_positions, (abfd), bfd *abfd) |
| 1722 | { |
| 1723 | Elf_Internal_Ehdr *i_ehdrp; /* Elf file header, internal form */ |
| 1724 | Elf_Internal_Shdr *i_shdrp; /* Section header table, internal form */ |
| 1725 | struct strtab *shstrtab; |
| 1726 | int count, maxsections; |
| 1727 | elf_sect_thunk est; |
| 1728 | |
| 1729 | if (! elf_shstrtab (abfd)) { |
| 1730 | i_ehdrp = elf_elfheader (abfd); /* build new header in tdata memory */ |
| 1731 | shstrtab = bfd_new_strtab(abfd); |
| 1732 | |
| 1733 | i_ehdrp->e_ident[EI_MAG0] = ELFMAG0; |
| 1734 | i_ehdrp->e_ident[EI_MAG1] = ELFMAG1; |
| 1735 | i_ehdrp->e_ident[EI_MAG2] = ELFMAG2; |
| 1736 | i_ehdrp->e_ident[EI_MAG3] = ELFMAG3; |
| 1737 | |
| 1738 | i_ehdrp->e_ident[EI_CLASS] = ELFCLASS32; /* FIXME: find out from bfd */ |
| 1739 | i_ehdrp->e_ident[EI_DATA] = |
| 1740 | abfd->xvec->byteorder_big_p ? ELFDATA2MSB : ELFDATA2LSB; |
| 1741 | i_ehdrp->e_ident[EI_VERSION] = EV_CURRENT; |
| 1742 | |
| 1743 | for(count = EI_PAD; count < EI_NIDENT; count ++) |
| 1744 | i_ehdrp->e_ident[count] = 0; |
| 1745 | |
| 1746 | i_ehdrp->e_type = (abfd->flags & EXEC_P)? ET_EXEC : ET_REL; |
| 1747 | switch(bfd_get_arch(abfd)) |
| 1748 | { |
| 1749 | case bfd_arch_unknown: |
| 1750 | i_ehdrp->e_machine = EM_NONE; |
| 1751 | break; |
| 1752 | case bfd_arch_sparc: |
| 1753 | i_ehdrp->e_machine = EM_SPARC; |
| 1754 | break; |
| 1755 | case bfd_arch_i386: |
| 1756 | i_ehdrp->e_machine = EM_386; |
| 1757 | break; |
| 1758 | case bfd_arch_m68k: |
| 1759 | i_ehdrp->e_machine = EM_68K; |
| 1760 | break; |
| 1761 | case bfd_arch_m88k: |
| 1762 | i_ehdrp->e_machine = EM_88K; |
| 1763 | break; |
| 1764 | case bfd_arch_i860: |
| 1765 | i_ehdrp->e_machine = EM_860; |
| 1766 | break; |
| 1767 | case bfd_arch_mips: /* MIPS Rxxxx */ |
| 1768 | i_ehdrp->e_machine = EM_MIPS; /* only MIPS R3000 */ |
| 1769 | break; |
| 1770 | case bfd_arch_hppa: |
| 1771 | i_ehdrp->e_machine = EM_HPPA; |
| 1772 | break; |
| 1773 | /* also note that EM_M32, AT&T WE32100 is unknown to bfd */ |
| 1774 | default: |
| 1775 | i_ehdrp->e_machine = EM_NONE; |
| 1776 | } |
| 1777 | i_ehdrp->e_version = EV_CURRENT; |
| 1778 | i_ehdrp->e_ehsize = sizeof(Elf_External_Ehdr); |
| 1779 | |
| 1780 | /* no program header, for now. */ |
| 1781 | i_ehdrp->e_phoff = 0; |
| 1782 | i_ehdrp->e_phentsize = 0; |
| 1783 | i_ehdrp->e_phnum = 0; |
| 1784 | |
| 1785 | /* each bfd section is section header entry */ |
| 1786 | i_ehdrp->e_entry = bfd_get_start_address (abfd); |
| 1787 | i_ehdrp->e_shentsize = sizeof (Elf_External_Shdr); |
| 1788 | |
| 1789 | /* figure at most each section can have a rel, strtab, symtab */ |
| 1790 | maxsections = 4*bfd_count_sections(abfd)+2; |
| 1791 | |
| 1792 | i_ehdrp->e_shoff = i_ehdrp->e_ehsize; |
| 1793 | |
| 1794 | /* and we'll just have to fix up the offsets later. */ |
| 1795 | /* outbase += i_ehdr.e_shentsize * i_ehdr.e_shnum; */ |
| 1796 | |
| 1797 | i_shdrp = (Elf_Internal_Shdr *) |
| 1798 | bfd_alloc (abfd, sizeof (*i_shdrp) * maxsections); |
| 1799 | if (! i_shdrp) |
| 1800 | { |
| 1801 | bfd_error = no_memory; |
| 1802 | return (false); |
| 1803 | } |
| 1804 | for (count=0; count < maxsections; count++) |
| 1805 | { |
| 1806 | i_shdrp[count].rawdata = 0; |
| 1807 | i_shdrp[count].contents = 0; |
| 1808 | } |
| 1809 | |
| 1810 | |
| 1811 | i_shdrp[0].sh_name = 0; |
| 1812 | i_shdrp[0].sh_type = SHT_NULL; |
| 1813 | i_shdrp[0].sh_flags = 0; |
| 1814 | i_shdrp[0].sh_addr = 0; |
| 1815 | i_shdrp[0].sh_offset = 0; |
| 1816 | i_shdrp[0].sh_size = 0; |
| 1817 | i_shdrp[0].sh_link = SHN_UNDEF; |
| 1818 | i_shdrp[0].sh_info = 0; |
| 1819 | i_shdrp[0].sh_addralign = 0; |
| 1820 | i_shdrp[0].sh_entsize = 0; |
| 1821 | |
| 1822 | i_ehdrp->e_shnum = 1; |
| 1823 | |
| 1824 | elf_elfsections (abfd) = i_shdrp; |
| 1825 | elf_shstrtab (abfd) = shstrtab; |
| 1826 | } |
| 1827 | est.i_ehdr = elf_elfheader(abfd); |
| 1828 | est.i_shdrp = elf_elfsections(abfd); |
| 1829 | est.shstrtab = elf_shstrtab(abfd); |
| 1830 | est.symtab_section = 0; /* elf_fake_sections fils it in */ |
| 1831 | |
| 1832 | bfd_map_over_sections(abfd, elf_fake_sections, &est); |
| 1833 | elf_onesymtab (abfd) = est.symtab_section; |
| 1834 | return (true); |
| 1835 | } |
| 1836 | |
| 1837 | static boolean |
| 1838 | DEFUN (elf_write_phdrs, (abfd, i_ehdrp, i_phdrp, phdr_cnt), |
| 1839 | bfd *abfd AND |
| 1840 | Elf_Internal_Ehdr *i_ehdrp AND |
| 1841 | Elf_Internal_Phdr *i_phdrp AND |
| 1842 | Elf_Half phdr_cnt) |
| 1843 | { |
| 1844 | /* first program header entry goes after the file header */ |
| 1845 | int outbase = i_ehdrp->e_ehsize; |
| 1846 | int i; |
| 1847 | Elf_External_Phdr x_phdr; |
| 1848 | |
| 1849 | for ( i = 0; i < phdr_cnt; i++ ) { |
| 1850 | elf_swap_phdr_out(abfd, i_phdrp + i, &x_phdr); |
| 1851 | bfd_seek(abfd, outbase, SEEK_SET); |
| 1852 | bfd_write( (PTR)&x_phdr, sizeof(x_phdr), 1, abfd); |
| 1853 | outbase += sizeof(x_phdr); |
| 1854 | } |
| 1855 | |
| 1856 | return true; |
| 1857 | } |
| 1858 | |
| 1859 | static Elf_Internal_Phdr * |
| 1860 | DEFUN (elf_build_phdrs, (abfd, i_ehdrp, i_shdrp, phdr_cnt), |
| 1861 | bfd *abfd AND |
| 1862 | Elf_Internal_Ehdr *i_ehdrp AND |
| 1863 | Elf_Internal_Shdr *i_shdrp AND |
| 1864 | Elf_Half *phdr_cnt) |
| 1865 | { |
| 1866 | Elf_Internal_Phdr *phdr_buf; |
| 1867 | int idx; |
| 1868 | /* |
| 1869 | NOTES: |
| 1870 | 1. The program header table is *not* loaded as part |
| 1871 | of the memory image of the program. If this |
| 1872 | changes later, the PT_PHDR entry must come first. |
| 1873 | 2. there is currently no support for program header |
| 1874 | entries of type PT_PHDR, PT_DYNAMIC, PT_INTERP, |
| 1875 | or PT_SHLIB. |
| 1876 | */ |
| 1877 | |
| 1878 | /* A. Figure out how many program header table entries are needed */ |
| 1879 | /* 1. PT_LOAD for the text segment */ |
| 1880 | /* 2. PT_LOAD for the data segment */ |
| 1881 | /* Then, reserve space for one more pointer. This will be NULL */ |
| 1882 | /* to indicate the end of the program header table. */ |
| 1883 | |
| 1884 | #ifdef PHDRS_INCLUDED |
| 1885 | *phdr_cnt = 4; |
| 1886 | #else |
| 1887 | *phdr_cnt = 3; /* XXX right now, execve() expects exactly 3 PT entries */ |
| 1888 | #endif |
| 1889 | |
| 1890 | phdr_buf = (Elf_Internal_Phdr *)bfd_xmalloc( ((*phdr_cnt) + 1) |
| 1891 | * |
| 1892 | sizeof(Elf_Internal_Phdr)); |
| 1893 | |
| 1894 | idx = 0; |
| 1895 | #ifdef PHDRS_INCLUDED |
| 1896 | /* B. Fill in the PT_PHDR entry. */ |
| 1897 | |
| 1898 | idx++; |
| 1899 | #endif |
| 1900 | |
| 1901 | /* C. Fill in the PT_LOAD entry for the text segment. */ |
| 1902 | |
| 1903 | phdr_buf[idx].p_type = PT_LOAD; |
| 1904 | |
| 1905 | /* get virtual/physical address from .text section */ |
| 1906 | phdr_buf[idx].p_vaddr = bfd_get_section_by_name(abfd,".text")->vma; |
| 1907 | phdr_buf[idx].p_paddr = 0; /* XXX */ |
| 1908 | |
| 1909 | /* Ultimately, we would like the size of the .text load */ |
| 1910 | /* segment to be the sum of the following sections: */ |
| 1911 | /* the program header table itself */ |
| 1912 | /* .interp */ |
| 1913 | /* .hash */ |
| 1914 | /* .dynsym */ |
| 1915 | /* .dynstr */ |
| 1916 | /* .rela.bss */ |
| 1917 | /* .rela.plt */ |
| 1918 | /* .init */ |
| 1919 | /* .text */ |
| 1920 | /* .fini */ |
| 1921 | /* .rodata */ |
| 1922 | /* But, right now, it will be the sum of the following */ |
| 1923 | /* sections: */ |
| 1924 | /* .text */ |
| 1925 | /* .rodata */ |
| 1926 | |
| 1927 | { |
| 1928 | static char *CONST ld_sect_names[] = |
| 1929 | { ".text", ".rodata", NULL }; |
| 1930 | int i; |
| 1931 | int ld_size = 0; |
| 1932 | |
| 1933 | for ( i = 0; ld_sect_names[i]; i++ ) { |
| 1934 | asection *asect = bfd_get_section_by_name(abfd, |
| 1935 | ld_sect_names[i]); |
| 1936 | |
| 1937 | if ( asect ) |
| 1938 | ld_size += bfd_section_size(abfd, asect); |
| 1939 | } |
| 1940 | phdr_buf[idx].p_filesz = ld_size; |
| 1941 | /* XXX: need to fix this */ |
| 1942 | phdr_buf[idx].p_memsz = ld_size; |
| 1943 | } |
| 1944 | phdr_buf[idx].p_flags = PF_R + PF_X; |
| 1945 | phdr_buf[idx].p_align |
| 1946 | = bfd_get_section_by_name(abfd,".text")->alignment_power; |
| 1947 | |
| 1948 | idx++; |
| 1949 | |
| 1950 | /* D. Fill in the PT_LOAD entry for the data segment. */ |
| 1951 | |
| 1952 | phdr_buf[idx].p_type = PT_LOAD; |
| 1953 | |
| 1954 | /* get virtual/physical address from .data section */ |
| 1955 | phdr_buf[idx].p_vaddr = bfd_get_section_by_name(abfd,".data")->vma; |
| 1956 | phdr_buf[idx].p_paddr = 0; /* XXX */ |
| 1957 | |
| 1958 | /* Ultimately, we would like the size of the data load segment */ |
| 1959 | /* to be the sum of the following sections: */ |
| 1960 | /* the PT_DYNAMIC program header table entry */ |
| 1961 | /* .plt */ |
| 1962 | /* .data */ |
| 1963 | /* .data1 */ |
| 1964 | /* .got */ |
| 1965 | /* .dynamic */ |
| 1966 | /* But, right now, it will be the sum of the following */ |
| 1967 | /* sections: */ |
| 1968 | /* .data */ |
| 1969 | |
| 1970 | { |
| 1971 | static char *CONST ld_sect_names[] = |
| 1972 | { ".data", NULL }; |
| 1973 | int i; |
| 1974 | int ld_size = 0; |
| 1975 | |
| 1976 | for ( i = 0; ld_sect_names[i]; i++ ) { |
| 1977 | asection *asect = bfd_get_section_by_name(abfd, |
| 1978 | ld_sect_names[i]); |
| 1979 | |
| 1980 | if ( asect ) |
| 1981 | ld_size += bfd_section_size(abfd, asect); |
| 1982 | } |
| 1983 | phdr_buf[idx].p_filesz = ld_size; |
| 1984 | /* XXX: need to fix this */ |
| 1985 | phdr_buf[idx].p_memsz = ld_size; |
| 1986 | } |
| 1987 | phdr_buf[idx].p_flags = PF_R + PF_W + PF_X; |
| 1988 | phdr_buf[idx].p_align |
| 1989 | = bfd_get_section_by_name(abfd,".data")->alignment_power; |
| 1990 | |
| 1991 | idx++; |
| 1992 | |
| 1993 | /* E. Fill in the PT_LOAD entry for the bss segment. */ |
| 1994 | |
| 1995 | phdr_buf[idx].p_type = PT_LOAD; |
| 1996 | |
| 1997 | /* get virtual/physical address from .data section */ |
| 1998 | phdr_buf[idx].p_vaddr = bfd_get_section_by_name(abfd,".bss")->vma; |
| 1999 | phdr_buf[idx].p_paddr = 0; /* XXX */ |
| 2000 | |
| 2001 | { |
| 2002 | static char *CONST ld_sect_names[] = |
| 2003 | { ".bss", NULL }; |
| 2004 | int i; |
| 2005 | int ld_size = 0; |
| 2006 | |
| 2007 | for ( i = 0; ld_sect_names[i]; i++ ) { |
| 2008 | asection *asect = bfd_get_section_by_name(abfd, |
| 2009 | ld_sect_names[i]); |
| 2010 | |
| 2011 | if ( asect ) |
| 2012 | ld_size += bfd_section_size(abfd, asect); |
| 2013 | } |
| 2014 | phdr_buf[idx].p_filesz = 0; |
| 2015 | /* XXX: need to fix this */ |
| 2016 | phdr_buf[idx].p_memsz = ld_size; |
| 2017 | } |
| 2018 | phdr_buf[idx].p_flags = PF_R + PF_W + PF_X; |
| 2019 | phdr_buf[idx].p_align |
| 2020 | = bfd_get_section_by_name(abfd,".bss")->alignment_power; |
| 2021 | |
| 2022 | idx++; |
| 2023 | |
| 2024 | /* F. Set up the "end of program header table" sentinel. */ |
| 2025 | |
| 2026 | bzero((char *)(phdr_buf+idx),sizeof(Elf_Internal_Phdr)); |
| 2027 | idx++; |
| 2028 | |
| 2029 | BFD_ASSERT(idx - 1 == *phdr_cnt); |
| 2030 | |
| 2031 | return phdr_buf; |
| 2032 | } |
| 2033 | |
| 2034 | boolean |
| 2035 | DEFUN (elf_write_object_contents, (abfd), bfd *abfd) |
| 2036 | { |
| 2037 | Elf_External_Ehdr x_ehdr; /* Elf file header, external form */ |
| 2038 | Elf_Internal_Ehdr *i_ehdrp; /* Elf file header, internal form */ |
| 2039 | Elf_External_Phdr *x_phdrp; /* Program header table, external form */ |
| 2040 | Elf_Internal_Phdr *i_phdrp; /* Program header table, internal form */ |
| 2041 | Elf_External_Shdr *x_shdrp; /* Section header table, external form */ |
| 2042 | Elf_Internal_Shdr *i_shdrp; /* Section header table, internal form */ |
| 2043 | asection *nsect; |
| 2044 | elf_sect_thunk est; |
| 2045 | |
| 2046 | int outbase = 0; |
| 2047 | int count; |
| 2048 | int scnt; |
| 2049 | struct strtab *shstrtab; |
| 2050 | |
| 2051 | if(abfd->output_has_begun == false) |
| 2052 | { |
| 2053 | elf_compute_section_file_positions(abfd); |
| 2054 | abfd->output_has_begun = true; |
| 2055 | } |
| 2056 | |
| 2057 | i_ehdrp = elf_elfheader (abfd); |
| 2058 | i_shdrp = elf_elfsections (abfd); |
| 2059 | shstrtab = elf_shstrtab (abfd); |
| 2060 | |
| 2061 | est.i_ehdr = i_ehdrp; |
| 2062 | est.i_shdrp = i_shdrp; |
| 2063 | est.shstrtab = shstrtab; |
| 2064 | est.symtab_section = elf_onesymtab (abfd); /* filled in by elf_fake */ |
| 2065 | |
| 2066 | bfd_map_over_sections(abfd, elf_make_sections, &est); |
| 2067 | |
| 2068 | /* Dump out the symtabs. */ |
| 2069 | { |
| 2070 | int symcount = bfd_get_symcount (abfd); |
| 2071 | asymbol ** syms = bfd_get_outsymbols (abfd); |
| 2072 | struct strtab * stt = bfd_new_strtab (abfd); |
| 2073 | Elf_Internal_Shdr *symtab_hdr; |
| 2074 | Elf_Internal_Shdr *symstrtab_hdr; |
| 2075 | int symstrtab_section; |
| 2076 | Elf_External_Sym *outbound_syms; |
| 2077 | int idx; |
| 2078 | |
| 2079 | symtab_hdr = &i_shdrp[est.symtab_section]; |
| 2080 | symtab_hdr->sh_type = SHT_SYMTAB; |
| 2081 | symtab_hdr->sh_entsize = sizeof (Elf_External_Sym); |
| 2082 | symtab_hdr->sh_size = symtab_hdr->sh_entsize * (symcount + 1); |
| 2083 | |
| 2084 | /* see assert in elf_fake_sections that supports this: */ |
| 2085 | symstrtab_section = est.symtab_section+1; |
| 2086 | symstrtab_hdr = &i_shdrp[symstrtab_section]; |
| 2087 | symtab_hdr->sh_link = symstrtab_section; |
| 2088 | symstrtab_hdr->sh_type = SHT_STRTAB; |
| 2089 | |
| 2090 | outbound_syms = (Elf_External_Sym*) |
| 2091 | bfd_alloc(abfd, (1+symcount) * sizeof(Elf_External_Sym)); |
| 2092 | /* now generate the data (for "contents") */ |
| 2093 | for (idx = 0; idx < symcount; idx++) |
| 2094 | { |
| 2095 | Elf_Internal_Sym sym; |
| 2096 | bfd_vma value = syms[idx]->value; |
| 2097 | |
| 2098 | sym.st_name = bfd_add_to_strtab (abfd, stt, syms[idx]->name); |
| 2099 | |
| 2100 | value += syms[idx]->section->output_section->vma |
| 2101 | + syms[idx]->section->output_offset; |
| 2102 | sym.st_value = value; |
| 2103 | |
| 2104 | sym.st_size = (Elf_Word)(elf_symbol_from(abfd, syms[idx]))->internal_elf_sym.st_size; |
| 2105 | |
| 2106 | if (syms[idx]->flags & BSF_WEAK) |
| 2107 | sym.st_info = ELF_ST_INFO(STB_WEAK, STT_OBJECT); |
| 2108 | else if (syms[idx]->flags & BSF_LOCAL) { |
| 2109 | if ( syms[idx]->flags & BSF_FUNCTION ) |
| 2110 | sym.st_info = ELF_ST_INFO(STB_LOCAL, STT_FUNC); |
| 2111 | else |
| 2112 | sym.st_info = ELF_ST_INFO(STB_LOCAL, STT_OBJECT); |
| 2113 | } |
| 2114 | else if (syms[idx]->flags & BSF_GLOBAL) { |
| 2115 | if ( syms[idx]->flags & BSF_FUNCTION ) |
| 2116 | sym.st_info = ELF_ST_INFO(STB_GLOBAL, STT_FUNC); |
| 2117 | else |
| 2118 | sym.st_info = ELF_ST_INFO(STB_GLOBAL, STT_OBJECT); |
| 2119 | } |
| 2120 | else if (syms[idx]->flags & BSF_EXPORT) { |
| 2121 | if ( syms[idx]->flags & BSF_FUNCTION ) |
| 2122 | sym.st_info = ELF_ST_INFO(STB_GLOBAL, STT_FUNC); |
| 2123 | else |
| 2124 | sym.st_info = ELF_ST_INFO(STB_GLOBAL, STT_OBJECT); |
| 2125 | } |
| 2126 | else if (syms[idx]->flags & BSF_SECTION_SYM) |
| 2127 | sym.st_info = ELF_ST_INFO(STB_LOCAL, STT_SECTION); |
| 2128 | else if (syms[idx]->flags & BSF_FILE) |
| 2129 | sym.st_info = ELF_ST_INFO(STB_LOCAL, STT_FILE); |
| 2130 | else |
| 2131 | sym.st_info = ELF_ST_INFO(STB_LOCAL, STT_OBJECT); |
| 2132 | |
| 2133 | sym.st_other = 0; |
| 2134 | if (syms[idx]->section) |
| 2135 | sym.st_shndx = |
| 2136 | elf_section_from_bfd_section(abfd, |
| 2137 | syms[idx]->section->output_section); |
| 2138 | else |
| 2139 | sym.st_shndx = SHN_UNDEF; |
| 2140 | |
| 2141 | elf_swap_symbol_out (abfd, &sym, outbound_syms+idx+1); |
| 2142 | } |
| 2143 | { |
| 2144 | /* fill in 0th symbol */ |
| 2145 | Elf_Internal_Sym sym; |
| 2146 | sym.st_name = 0; |
| 2147 | sym.st_value = 0; |
| 2148 | sym.st_size = 0; |
| 2149 | sym.st_info = 0; |
| 2150 | sym.st_other = 0; |
| 2151 | sym.st_shndx = SHN_UNDEF; |
| 2152 | elf_swap_symbol_out (abfd, &sym, outbound_syms); |
| 2153 | } |
| 2154 | symtab_hdr->contents = (void*)outbound_syms; |
| 2155 | symstrtab_hdr->contents = (void*)stt->tab; |
| 2156 | symstrtab_hdr->sh_size = stt->length; |
| 2157 | symstrtab_hdr->sh_type = SHT_STRTAB; |
| 2158 | } |
| 2159 | |
| 2160 | /* put the strtab out too... */ |
| 2161 | { |
| 2162 | Elf_Internal_Shdr *this_hdr; |
| 2163 | int this_section; |
| 2164 | |
| 2165 | this_section = i_ehdrp->e_shnum++; |
| 2166 | i_ehdrp->e_shstrndx = this_section; |
| 2167 | this_hdr = &i_shdrp[this_section]; |
| 2168 | this_hdr->sh_name = bfd_add_to_strtab (abfd, shstrtab, ".shstrtab"); |
| 2169 | this_hdr->sh_type = SHT_STRTAB; |
| 2170 | this_hdr->sh_size = shstrtab->length; |
| 2171 | this_hdr->sh_type = SHT_STRTAB; |
| 2172 | this_hdr->contents = (void*)shstrtab->tab; |
| 2173 | } |
| 2174 | |
| 2175 | outbase = i_ehdrp->e_ehsize; |
| 2176 | |
| 2177 | /* if we're building an executable, we'll need a program header table */ |
| 2178 | if (abfd->flags & EXEC_P) |
| 2179 | { |
| 2180 | i_ehdrp->e_phentsize = sizeof(Elf_External_Phdr); |
| 2181 | |
| 2182 | /* elf_build_phdrs() returns a (NULL-terminated) array of |
| 2183 | Elf_Internal_Phdrs */ |
| 2184 | i_phdrp = elf_build_phdrs(abfd,i_ehdrp, i_shdrp, &i_ehdrp->e_phnum); |
| 2185 | i_ehdrp->e_phoff = i_ehdrp->e_ehsize; |
| 2186 | i_ehdrp->e_shoff = i_ehdrp->e_phoff + (i_ehdrp->e_phentsize |
| 2187 | * i_ehdrp->e_phnum); |
| 2188 | } |
| 2189 | |
| 2190 | /* swap the header before spitting it out... */ |
| 2191 | elf_swap_ehdr_out (abfd, i_ehdrp, &x_ehdr); |
| 2192 | bfd_seek (abfd, (file_ptr) 0, SEEK_SET); |
| 2193 | bfd_write ((PTR) &x_ehdr, sizeof(x_ehdr), 1, abfd); |
| 2194 | |
| 2195 | outbase += i_ehdrp->e_phentsize * i_ehdrp->e_phnum; |
| 2196 | outbase += i_ehdrp->e_shentsize * i_ehdrp->e_shnum; |
| 2197 | |
| 2198 | /* now we fix up the offsets... */ |
| 2199 | for (count = 1; count < i_ehdrp->e_shnum; count ++) |
| 2200 | { |
| 2201 | i_shdrp[count].sh_offset = outbase; |
| 2202 | outbase += i_shdrp[count].sh_size; |
| 2203 | } |
| 2204 | |
| 2205 | /* If we're building an executable, fixup the program header table |
| 2206 | offsets. |
| 2207 | |
| 2208 | @@ For now, assume that the entries are in a fixed order: text, |
| 2209 | data, bss. FIXME */ |
| 2210 | |
| 2211 | if ( abfd->flags & EXEC_P ) |
| 2212 | { |
| 2213 | static char *CONST section_name[] = { ".text", ".data", ".bss" }; |
| 2214 | |
| 2215 | for ( count = 0; count < 3; count ++ ) |
| 2216 | { |
| 2217 | asection *asect = bfd_get_section_by_name(abfd, section_name[count]); |
| 2218 | int sh_idx = elf_section_from_bfd_section(abfd, asect); |
| 2219 | |
| 2220 | i_phdrp[count].p_offset = i_shdrp[sh_idx].sh_offset; |
| 2221 | } |
| 2222 | |
| 2223 | /* write out the program header table entries */ |
| 2224 | elf_write_phdrs(abfd, i_ehdrp, i_phdrp, i_ehdrp->e_phnum); |
| 2225 | } |
| 2226 | |
| 2227 | /* at this point we've concocted all the ELF sections... */ |
| 2228 | x_shdrp = (Elf_External_Shdr *) |
| 2229 | bfd_alloc (abfd, sizeof (*x_shdrp) * (i_ehdrp->e_shnum)); |
| 2230 | if (! x_shdrp) |
| 2231 | { |
| 2232 | bfd_error = no_memory; |
| 2233 | return (false); |
| 2234 | } |
| 2235 | |
| 2236 | for (count = 0, scnt = 0; count < i_ehdrp->e_shnum; count++) |
| 2237 | { |
| 2238 | elf_swap_shdr_out (abfd, i_shdrp+count, x_shdrp+scnt); |
| 2239 | scnt++; |
| 2240 | } |
| 2241 | bfd_write ((PTR) x_shdrp, sizeof(*x_shdrp), i_ehdrp->e_shnum, abfd); |
| 2242 | /* need to dump the string table too... */ |
| 2243 | |
| 2244 | /* after writing the headers, we need to write the sections too... */ |
| 2245 | nsect = abfd->sections; |
| 2246 | for (count = 0; count < i_ehdrp->e_shnum; count ++) |
| 2247 | { |
| 2248 | if(i_shdrp[count].contents) |
| 2249 | { |
| 2250 | bfd_seek (abfd, i_shdrp[count].sh_offset, SEEK_SET); |
| 2251 | bfd_write (i_shdrp[count].contents, i_shdrp[count].sh_size, 1, abfd); |
| 2252 | } |
| 2253 | } |
| 2254 | |
| 2255 | return true; |
| 2256 | } |
| 2257 | |
| 2258 | /* Given an index of a section, retrieve a pointer to it. Note |
| 2259 | that for our purposes, sections are indexed by {1, 2, ...} with |
| 2260 | 0 being an illegal index. */ |
| 2261 | |
| 2262 | /* In the original, each ELF section went into exactly one BFD |
| 2263 | section. This doesn't really make sense, so we need a real mapping. |
| 2264 | The mapping has to hide in the Elf_Internal_Shdr since asection |
| 2265 | doesn't have anything like a tdata field... */ |
| 2266 | |
| 2267 | static struct sec * |
| 2268 | DEFUN (section_from_elf_index, (abfd, index), |
| 2269 | bfd *abfd AND |
| 2270 | int index) |
| 2271 | { |
| 2272 | /* @@ Is bfd_com_section really correct in all the places it could |
| 2273 | be returned from this routine? */ |
| 2274 | |
| 2275 | if (index == SHN_ABS) |
| 2276 | return &bfd_com_section; |
| 2277 | if (index == SHN_COMMON) |
| 2278 | return &bfd_com_section; |
| 2279 | |
| 2280 | { |
| 2281 | Elf_Internal_Shdr *i_shdrp = elf_elfsections (abfd); |
| 2282 | Elf_Internal_Shdr *hdr = i_shdrp + index; |
| 2283 | |
| 2284 | switch (hdr->sh_type) |
| 2285 | { |
| 2286 | /* ELF sections that map to BFD sections */ |
| 2287 | case SHT_PROGBITS: |
| 2288 | case SHT_NOBITS: |
| 2289 | if (! hdr->rawdata) |
| 2290 | bfd_section_from_shdr (abfd, index); |
| 2291 | return (struct sec *) hdr->rawdata; |
| 2292 | |
| 2293 | default: |
| 2294 | return (struct sec *) &bfd_abs_section; |
| 2295 | } |
| 2296 | } |
| 2297 | } |
| 2298 | |
| 2299 | /* given a section, search the header to find them... */ |
| 2300 | static int |
| 2301 | DEFUN (elf_section_from_bfd_section, (abfd, asect), |
| 2302 | bfd *abfd AND |
| 2303 | struct sec *asect) |
| 2304 | { |
| 2305 | Elf_Internal_Shdr *i_shdrp = elf_elfsections (abfd); |
| 2306 | int index; |
| 2307 | Elf_Internal_Shdr *hdr; |
| 2308 | int maxindex = elf_elfheader (abfd)->e_shnum; |
| 2309 | |
| 2310 | if (asect == &bfd_abs_section) |
| 2311 | return SHN_ABS; |
| 2312 | if (asect == &bfd_com_section) |
| 2313 | return SHN_COMMON; |
| 2314 | |
| 2315 | for(index = 0; index < maxindex; index++) { |
| 2316 | hdr = &i_shdrp[index]; |
| 2317 | switch (hdr->sh_type) |
| 2318 | { |
| 2319 | /* ELF sections that map to BFD sections */ |
| 2320 | case SHT_PROGBITS: |
| 2321 | case SHT_NOBITS: |
| 2322 | if (hdr->rawdata) |
| 2323 | { |
| 2324 | if (((struct sec *)(hdr->rawdata)) == asect) |
| 2325 | return index; |
| 2326 | } |
| 2327 | break; |
| 2328 | default: |
| 2329 | break; |
| 2330 | } |
| 2331 | } |
| 2332 | return 0; |
| 2333 | } |
| 2334 | |
| 2335 | static boolean |
| 2336 | DEFUN (elf_slurp_symbol_table, (abfd, symptrs), |
| 2337 | bfd *abfd AND |
| 2338 | asymbol **symptrs) /* Buffer for generated bfd symbols */ |
| 2339 | { |
| 2340 | Elf_Internal_Shdr *i_shdrp = elf_elfsections (abfd); |
| 2341 | Elf_Internal_Shdr *hdr = i_shdrp + elf_onesymtab (abfd); |
| 2342 | int symcount; /* Number of external ELF symbols */ |
| 2343 | int i; |
| 2344 | elf_symbol_type *sym; /* Pointer to current bfd symbol */ |
| 2345 | elf_symbol_type *symbase; /* Buffer for generated bfd symbols */ |
| 2346 | Elf_Internal_Sym i_sym; |
| 2347 | Elf_External_Sym *x_symp; |
| 2348 | |
| 2349 | /* this is only valid because there is only one symtab... */ |
| 2350 | /* FIXME: This is incorrect, there may also be a dynamic symbol |
| 2351 | table which is a subset of the full symbol table. We either need |
| 2352 | to be prepared to read both (and merge them) or ensure that we |
| 2353 | only read the full symbol table. Currently we only get called to |
| 2354 | read the full symbol table. -fnf */ |
| 2355 | if (bfd_get_outsymbols (abfd) != NULL) |
| 2356 | { |
| 2357 | return (true); |
| 2358 | } |
| 2359 | |
| 2360 | /* Read each raw ELF symbol, converting from external ELF form to |
| 2361 | internal ELF form, and then using the information to create a |
| 2362 | canonical bfd symbol table entry. |
| 2363 | |
| 2364 | Note that we allocate the initial bfd canonical symbol buffer |
| 2365 | based on a one-to-one mapping of the ELF symbols to canonical |
| 2366 | symbols. We actually use all the ELF symbols, so there will be no |
| 2367 | space left over at the end. When we have all the symbols, we |
| 2368 | build the caller's pointer vector. */ |
| 2369 | |
| 2370 | if (bfd_seek (abfd, hdr->sh_offset, SEEK_SET) == -1) |
| 2371 | { |
| 2372 | bfd_error = system_call_error; |
| 2373 | return (false); |
| 2374 | } |
| 2375 | |
| 2376 | symcount = hdr->sh_size / sizeof (Elf_External_Sym); |
| 2377 | symbase = (elf_symbol_type *) bfd_zalloc (abfd, symcount * sizeof (elf_symbol_type)); |
| 2378 | sym = symbase; |
| 2379 | |
| 2380 | /* Temporarily allocate room for the raw ELF symbols. */ |
| 2381 | x_symp = (Elf_External_Sym *) bfd_xmalloc (symcount * sizeof (Elf_External_Sym)); |
| 2382 | |
| 2383 | if (bfd_read ((PTR) x_symp, sizeof (Elf_External_Sym), symcount, abfd) |
| 2384 | != symcount * sizeof (Elf_External_Sym)) |
| 2385 | { |
| 2386 | free ((PTR)x_symp); |
| 2387 | bfd_error = system_call_error; |
| 2388 | return (false); |
| 2389 | } |
| 2390 | /* Skip first symbol, which is a null dummy. */ |
| 2391 | for (i = 1; i < symcount; i++) |
| 2392 | { |
| 2393 | elf_swap_symbol_in (abfd, x_symp + i, &i_sym); |
| 2394 | memcpy (&sym->internal_elf_sym, &i_sym, sizeof (Elf_Internal_Sym)); |
| 2395 | memcpy (&sym->native_elf_sym, x_symp + i, sizeof (Elf_External_Sym)); |
| 2396 | sym->symbol.the_bfd = abfd; |
| 2397 | if (i_sym.st_name > 0) |
| 2398 | sym->symbol.name = elf_string_from_elf_section(abfd, hdr->sh_link, |
| 2399 | i_sym.st_name); |
| 2400 | else |
| 2401 | sym->symbol.name = ""; /* perhaps should include the number? */ |
| 2402 | |
| 2403 | sym->symbol.value = i_sym.st_value; |
| 2404 | /* FIXME -- this is almost certainly bogus. It's from Pace |
| 2405 | Willisson's hasty Solaris support, to pass the sizes of |
| 2406 | object files or functions down into GDB via the back door, to |
| 2407 | circumvent some other kludge in how Sun hacked stabs. -- |
| 2408 | gnu@cygnus.com */ |
| 2409 | /* XXX size is now stored via a pointer in an elf_symbol_type */ |
| 2410 | /* sym ->symbol.udata = (PTR)i_sym.st_size; */ |
| 2411 | /* FIXME -- end of bogosity. */ |
| 2412 | if (i_sym.st_shndx > 0 && i_sym.st_shndx < SHN_LORESERV) |
| 2413 | { |
| 2414 | sym->symbol.section = section_from_elf_index (abfd, i_sym.st_shndx); |
| 2415 | } |
| 2416 | else if (i_sym.st_shndx == SHN_ABS) |
| 2417 | { |
| 2418 | sym->symbol.section = &bfd_abs_section; |
| 2419 | } |
| 2420 | else if (i_sym.st_shndx == SHN_COMMON) |
| 2421 | { |
| 2422 | sym->symbol.section = &bfd_com_section; |
| 2423 | } |
| 2424 | else if (i_sym.st_shndx == SHN_UNDEF) |
| 2425 | { |
| 2426 | sym->symbol.section = &bfd_und_section; |
| 2427 | } |
| 2428 | else |
| 2429 | sym->symbol.section = &bfd_abs_section; |
| 2430 | |
| 2431 | switch (ELF_ST_BIND (i_sym.st_info)) |
| 2432 | { |
| 2433 | case STB_LOCAL: |
| 2434 | sym->symbol.flags |= BSF_LOCAL; |
| 2435 | break; |
| 2436 | case STB_GLOBAL: |
| 2437 | sym->symbol.flags |= (BSF_GLOBAL | BSF_EXPORT); |
| 2438 | break; |
| 2439 | case STB_WEAK: |
| 2440 | sym->symbol.flags |= BSF_WEAK; |
| 2441 | break; |
| 2442 | } |
| 2443 | |
| 2444 | switch (ELF_ST_TYPE (i_sym.st_info)) |
| 2445 | { |
| 2446 | case STT_SECTION: |
| 2447 | sym->symbol.flags |= BSF_SECTION_SYM | BSF_DEBUGGING; |
| 2448 | break; |
| 2449 | case STT_FILE: |
| 2450 | sym->symbol.flags |= BSF_FILE | BSF_DEBUGGING; |
| 2451 | break; |
| 2452 | case STT_FUNC: |
| 2453 | sym->symbol.flags |= BSF_FUNCTION; |
| 2454 | break; |
| 2455 | } |
| 2456 | /* Is this a definition of $global$? If so, keep it because it will be |
| 2457 | needd if any relocations are performed. */ |
| 2458 | if (!strcmp (sym->symbol.name, "$global$") |
| 2459 | && sym->symbol.section != &bfd_und_section) |
| 2460 | { |
| 2461 | /* @@ Why is this referring to backend data and not a field of |
| 2462 | abfd? FIXME */ |
| 2463 | struct elf_backend_data *be_data = (struct elf_backend_data *) abfd->xvec->backend_data; |
| 2464 | |
| 2465 | be_data->global_sym = sym; |
| 2466 | } |
| 2467 | sym++; |
| 2468 | } |
| 2469 | |
| 2470 | /* We rely on the zalloc to clear out the final symbol entry. */ |
| 2471 | |
| 2472 | obj_raw_syms (abfd) = x_symp; |
| 2473 | |
| 2474 | bfd_get_symcount(abfd) = symcount = sym - symbase; |
| 2475 | |
| 2476 | /* Fill in the user's symbol pointer vector if needed. */ |
| 2477 | if (symptrs) |
| 2478 | { |
| 2479 | sym = symbase; |
| 2480 | while (symcount-- > 0) |
| 2481 | { |
| 2482 | *symptrs++ = &sym->symbol; |
| 2483 | sym++; |
| 2484 | } |
| 2485 | *symptrs = 0; /* Final null pointer */ |
| 2486 | } |
| 2487 | |
| 2488 | return (true); |
| 2489 | } |
| 2490 | |
| 2491 | /* Return the number of bytes required to hold the symtab vector. |
| 2492 | |
| 2493 | Note that we base it on the count plus 1, since we will null terminate |
| 2494 | the vector allocated based on this size. However, the ELF symbol table |
| 2495 | always has a dummy entry as symbol #0, so it ends up even. */ |
| 2496 | |
| 2497 | unsigned int |
| 2498 | DEFUN (elf_get_symtab_upper_bound, (abfd), bfd *abfd) |
| 2499 | { |
| 2500 | unsigned int symcount; |
| 2501 | unsigned int symtab_size = 0; |
| 2502 | Elf_Internal_Shdr *i_shdrp; |
| 2503 | Elf_Internal_Shdr *hdr; |
| 2504 | |
| 2505 | i_shdrp = elf_elfsections (abfd); |
| 2506 | if (i_shdrp != NULL) |
| 2507 | { |
| 2508 | hdr = i_shdrp + elf_onesymtab (abfd); |
| 2509 | symcount = hdr->sh_size / sizeof (Elf_External_Sym); |
| 2510 | symtab_size = (symcount - 1 + 1) * (sizeof (asymbol)); |
| 2511 | } |
| 2512 | return (symtab_size); |
| 2513 | } |
| 2514 | |
| 2515 | /* |
| 2516 | This function return the number of bytes required to store the |
| 2517 | relocation information associated with section <<sect>> |
| 2518 | attached to bfd <<abfd>> |
| 2519 | |
| 2520 | */ |
| 2521 | unsigned int |
| 2522 | elf_get_reloc_upper_bound (abfd, asect) |
| 2523 | bfd *abfd; |
| 2524 | sec_ptr asect; |
| 2525 | { |
| 2526 | if (asect->flags & SEC_RELOC) |
| 2527 | { |
| 2528 | /* either rel or rela */ |
| 2529 | return asect->_raw_size; |
| 2530 | } |
| 2531 | else |
| 2532 | return (0); |
| 2533 | } |
| 2534 | |
| 2535 | static boolean |
| 2536 | DEFUN(elf_slurp_reloca_table,(abfd, asect, symbols), |
| 2537 | bfd *abfd AND |
| 2538 | sec_ptr asect AND |
| 2539 | asymbol **symbols) |
| 2540 | { |
| 2541 | Elf_External_Rela *native_relocs; |
| 2542 | arelent *reloc_cache; |
| 2543 | arelent *cache_ptr; |
| 2544 | |
| 2545 | unsigned int idx; |
| 2546 | |
| 2547 | if (asect->relocation) |
| 2548 | return true; |
| 2549 | if (asect->reloc_count == 0) |
| 2550 | return true; |
| 2551 | if (asect->flags & SEC_CONSTRUCTOR) |
| 2552 | return true; |
| 2553 | |
| 2554 | bfd_seek (abfd, asect->rel_filepos, SEEK_SET); |
| 2555 | native_relocs = (Elf_External_Rela *) |
| 2556 | bfd_alloc(abfd, asect->reloc_count * sizeof(Elf_External_Rela)); |
| 2557 | bfd_read ((PTR) native_relocs, |
| 2558 | sizeof(Elf_External_Rela), asect->reloc_count, abfd); |
| 2559 | |
| 2560 | reloc_cache = (arelent *) |
| 2561 | bfd_alloc(abfd, (size_t) (asect->reloc_count * sizeof(arelent))); |
| 2562 | |
| 2563 | if (! reloc_cache) { |
| 2564 | bfd_error = no_memory; |
| 2565 | return false; |
| 2566 | } |
| 2567 | |
| 2568 | for (idx = 0; idx < asect->reloc_count; idx ++) |
| 2569 | { |
| 2570 | #ifdef RELOC_PROCESSING |
| 2571 | /* sparc, 68k, 88k, 860 use rela only. */ |
| 2572 | /* 386 and we32000 use rel only... fix it for them later. */ |
| 2573 | Elf_Internal_Rela dst; |
| 2574 | Elf_External_Rela *src; |
| 2575 | |
| 2576 | cache_ptr = reloc_cache + idx; |
| 2577 | src = native_relocs + idx; |
| 2578 | elf_swap_reloca_in(abfd, src, &dst); |
| 2579 | |
| 2580 | RELOC_PROCESSING(cache_ptr, &dst, symbols, abfd, asect); |
| 2581 | #else |
| 2582 | Elf_Internal_Rela dst; |
| 2583 | Elf_External_Rela *src; |
| 2584 | |
| 2585 | cache_ptr = reloc_cache + idx; |
| 2586 | src = native_relocs + idx; |
| 2587 | |
| 2588 | elf_swap_reloca_in(abfd, src, &dst); |
| 2589 | |
| 2590 | if(asect->flags & SEC_RELOC) |
| 2591 | { |
| 2592 | /* relocatable, so the offset is off of the section */ |
| 2593 | cache_ptr->address = dst.r_offset + asect->vma; |
| 2594 | } |
| 2595 | else |
| 2596 | { |
| 2597 | /* non-relocatable, so the offset a virtual address */ |
| 2598 | cache_ptr->address = dst.r_offset; |
| 2599 | } |
| 2600 | /* ELF_R_SYM(dst.r_info) is the symbol table offset; subtract 1 |
| 2601 | because the first entry is NULL. */ |
| 2602 | cache_ptr->sym_ptr_ptr = symbols + ELF_R_SYM(dst.r_info) - 1; |
| 2603 | cache_ptr->addend = dst.r_addend; |
| 2604 | |
| 2605 | /* Fill in the cache_ptr->howto field from dst.r_type */ |
| 2606 | { |
| 2607 | struct elf_backend_data *ebd; |
| 2608 | ebd = (struct elf_backend_data *) (abfd->xvec->backend_data); |
| 2609 | (*ebd->elf_info_to_howto)(abfd, cache_ptr, &dst); |
| 2610 | } |
| 2611 | #endif |
| 2612 | } |
| 2613 | |
| 2614 | asect->relocation = reloc_cache; |
| 2615 | return true; |
| 2616 | } |
| 2617 | |
| 2618 | |
| 2619 | unsigned int |
| 2620 | elf_canonicalize_reloc (abfd, section, relptr, symbols) |
| 2621 | bfd *abfd; |
| 2622 | sec_ptr section; |
| 2623 | arelent **relptr; |
| 2624 | asymbol **symbols; |
| 2625 | { |
| 2626 | arelent *tblptr = section->relocation; |
| 2627 | unsigned int count = 0; |
| 2628 | |
| 2629 | /* snarfed from coffcode.h */ |
| 2630 | /* FIXME: this could be reloc... */ |
| 2631 | elf_slurp_reloca_table(abfd, section, symbols); |
| 2632 | |
| 2633 | tblptr = section->relocation; |
| 2634 | if (!tblptr) |
| 2635 | return 0; |
| 2636 | |
| 2637 | for (; count++ < section->reloc_count;) |
| 2638 | *relptr++ = tblptr++; |
| 2639 | |
| 2640 | *relptr = 0; |
| 2641 | return section->reloc_count; |
| 2642 | } |
| 2643 | |
| 2644 | unsigned int |
| 2645 | DEFUN (elf_get_symtab, (abfd, alocation), |
| 2646 | bfd *abfd AND |
| 2647 | asymbol **alocation) |
| 2648 | { |
| 2649 | |
| 2650 | if (!elf_slurp_symbol_table (abfd, alocation)) |
| 2651 | return (0); |
| 2652 | else |
| 2653 | return (bfd_get_symcount (abfd)); |
| 2654 | } |
| 2655 | |
| 2656 | asymbol * |
| 2657 | DEFUN (elf_make_empty_symbol, (abfd), |
| 2658 | bfd *abfd) |
| 2659 | { |
| 2660 | elf_symbol_type *newsym; |
| 2661 | |
| 2662 | newsym = (elf_symbol_type *) bfd_zalloc (abfd, sizeof (elf_symbol_type)); |
| 2663 | if (! newsym) |
| 2664 | { |
| 2665 | bfd_error = no_memory; |
| 2666 | return (NULL); |
| 2667 | } |
| 2668 | else |
| 2669 | { |
| 2670 | newsym -> symbol.the_bfd = abfd; |
| 2671 | return (&newsym -> symbol); |
| 2672 | } |
| 2673 | } |
| 2674 | |
| 2675 | void |
| 2676 | DEFUN (elf_print_symbol,(ignore_abfd, filep, symbol, how), |
| 2677 | bfd *ignore_abfd AND |
| 2678 | PTR filep AND |
| 2679 | asymbol *symbol AND |
| 2680 | bfd_print_symbol_type how) |
| 2681 | { |
| 2682 | FILE *file = (FILE *)filep; |
| 2683 | switch (how) |
| 2684 | { |
| 2685 | case bfd_print_symbol_name: |
| 2686 | fprintf(file, "%s", symbol->name); |
| 2687 | break; |
| 2688 | case bfd_print_symbol_more: |
| 2689 | fprintf(file, "elf %lx %lx", |
| 2690 | symbol->value, |
| 2691 | symbol->flags); |
| 2692 | break; |
| 2693 | case bfd_print_symbol_nm: |
| 2694 | case bfd_print_symbol_all: |
| 2695 | { |
| 2696 | CONST char *section_name; |
| 2697 | section_name = symbol->section? symbol->section->name : "(*none*)"; |
| 2698 | bfd_print_symbol_vandf((PTR) file, symbol); |
| 2699 | fprintf(file, " %s\t%s", |
| 2700 | section_name, |
| 2701 | symbol->name); |
| 2702 | } |
| 2703 | break; |
| 2704 | } |
| 2705 | |
| 2706 | } |
| 2707 | |
| 2708 | alent * |
| 2709 | DEFUN (elf_get_lineno,(ignore_abfd, symbol), |
| 2710 | bfd *ignore_abfd AND |
| 2711 | asymbol *symbol) |
| 2712 | { |
| 2713 | fprintf (stderr, "elf_get_lineno unimplemented\n"); |
| 2714 | fflush (stderr); |
| 2715 | abort (); |
| 2716 | return (NULL); |
| 2717 | } |
| 2718 | |
| 2719 | boolean |
| 2720 | DEFUN (elf_set_arch_mach,(abfd, arch, machine), |
| 2721 | bfd *abfd AND |
| 2722 | enum bfd_architecture arch AND |
| 2723 | unsigned long machine) |
| 2724 | { |
| 2725 | /* Allow any architecture to be supported by the elf backend */ |
| 2726 | switch(arch) |
| 2727 | { |
| 2728 | case bfd_arch_unknown: /* EM_NONE */ |
| 2729 | case bfd_arch_sparc: /* EM_SPARC */ |
| 2730 | case bfd_arch_i386: /* EM_386 */ |
| 2731 | case bfd_arch_m68k: /* EM_68K */ |
| 2732 | case bfd_arch_m88k: /* EM_88K */ |
| 2733 | case bfd_arch_i860: /* EM_860 */ |
| 2734 | case bfd_arch_mips: /* EM_MIPS (MIPS R3000) */ |
| 2735 | case bfd_arch_hppa: /* EM_HPPA (HP PA_RISC) */ |
| 2736 | return bfd_default_set_arch_mach(abfd, arch, machine); |
| 2737 | default: |
| 2738 | return false; |
| 2739 | } |
| 2740 | } |
| 2741 | |
| 2742 | boolean |
| 2743 | DEFUN (elf_find_nearest_line,(abfd, |
| 2744 | section, |
| 2745 | symbols, |
| 2746 | offset, |
| 2747 | filename_ptr, |
| 2748 | functionname_ptr, |
| 2749 | line_ptr), |
| 2750 | bfd *abfd AND |
| 2751 | asection *section AND |
| 2752 | asymbol **symbols AND |
| 2753 | bfd_vma offset AND |
| 2754 | CONST char **filename_ptr AND |
| 2755 | CONST char **functionname_ptr AND |
| 2756 | unsigned int *line_ptr) |
| 2757 | { |
| 2758 | return false; |
| 2759 | } |
| 2760 | |
| 2761 | int |
| 2762 | DEFUN (elf_sizeof_headers, (abfd, reloc), |
| 2763 | bfd *abfd AND |
| 2764 | boolean reloc) |
| 2765 | { |
| 2766 | fprintf (stderr, "elf_sizeof_headers unimplemented\n"); |
| 2767 | fflush (stderr); |
| 2768 | abort (); |
| 2769 | return (0); |
| 2770 | } |
| 2771 | |
| 2772 | boolean |
| 2773 | DEFUN(elf_set_section_contents, (abfd, section, location, offset, count), |
| 2774 | bfd *abfd AND |
| 2775 | sec_ptr section AND |
| 2776 | PTR location AND |
| 2777 | file_ptr offset AND |
| 2778 | bfd_size_type count) |
| 2779 | { |
| 2780 | int dest_sect; |
| 2781 | void *contents; |
| 2782 | if (abfd->output_has_begun == false) /* set by bfd.c handler? */ |
| 2783 | { |
| 2784 | /* do setup calculations (FIXME) */ |
| 2785 | elf_compute_section_file_positions(abfd); |
| 2786 | abfd->output_has_begun = true; |
| 2787 | } |
| 2788 | |
| 2789 | dest_sect = elf_section_from_bfd_section(abfd, section); |
| 2790 | if(!dest_sect) |
| 2791 | return false; |
| 2792 | |
| 2793 | if (bfd_seek (abfd, elf_elfsections(abfd)[dest_sect].sh_offset + offset, SEEK_SET) == -1) |
| 2794 | return false; |
| 2795 | if (bfd_write (location, 1, count, abfd) != count) |
| 2796 | return false; |
| 2797 | return true; |
| 2798 | } |
| 2799 | |
| 2800 | void |
| 2801 | DEFUN (elf_no_info_to_howto, (abfd, cache_ptr, dst), |
| 2802 | bfd *abfd AND |
| 2803 | arelent *cache_ptr AND |
| 2804 | Elf_Internal_Rela *dst) |
| 2805 | { |
| 2806 | abort (); |
| 2807 | } |