| File: | build/libiberty/simple-object-xcoff.c |
| Warning: | line 844, column 5 Value stored to 'align' is never read |
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| 1 | /* simple-object-coff.c -- routines to manipulate XCOFF object files. |
| 2 | Copyright (C) 2013-2023 Free Software Foundation, Inc. |
| 3 | Written by Ian Lance Taylor, Google and David Edelsohn, IBM. |
| 4 | |
| 5 | This program is free software; you can redistribute it and/or modify it |
| 6 | under the terms of the GNU General Public License as published by the |
| 7 | Free Software Foundation; either version 2, or (at your option) any |
| 8 | later version. |
| 9 | |
| 10 | This program is distributed in the hope that it will be useful, |
| 11 | but WITHOUT ANY WARRANTY; without even the implied warranty of |
| 12 | MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the |
| 13 | GNU General Public License for more details. |
| 14 | |
| 15 | You should have received a copy of the GNU General Public License |
| 16 | along with this program; if not, write to the Free Software |
| 17 | Foundation, 51 Franklin Street - Fifth Floor, |
| 18 | Boston, MA 02110-1301, USA. */ |
| 19 | |
| 20 | #include "config.h" |
| 21 | #include "libiberty.h" |
| 22 | #include "simple-object.h" |
| 23 | |
| 24 | #include <errno(*__errno_location ()).h> |
| 25 | #include <stddef.h> |
| 26 | |
| 27 | #ifdef HAVE_STDLIB_H1 |
| 28 | #include <stdlib.h> |
| 29 | #endif |
| 30 | |
| 31 | #ifdef HAVE_STDINT_H1 |
| 32 | #include <stdint.h> |
| 33 | #endif |
| 34 | |
| 35 | #ifdef HAVE_STRING_H1 |
| 36 | #include <string.h> |
| 37 | #endif |
| 38 | |
| 39 | #ifdef HAVE_INTTYPES_H1 |
| 40 | #include <inttypes.h> |
| 41 | #endif |
| 42 | |
| 43 | #include "simple-object-common.h" |
| 44 | |
| 45 | /* XCOFF structures and constants. */ |
| 46 | |
| 47 | /* XCOFF file header. */ |
| 48 | |
| 49 | struct external_filehdr |
| 50 | { |
| 51 | unsigned char f_magic[2]; /* magic number */ |
| 52 | unsigned char f_nscns[2]; /* number of sections */ |
| 53 | unsigned char f_timdat[4]; /* time & date stamp */ |
| 54 | union |
| 55 | { |
| 56 | struct |
| 57 | { |
| 58 | unsigned char f_symptr[4]; /* file pointer to symtab */ |
| 59 | unsigned char f_nsyms[4]; /* number of symtab entries */ |
| 60 | unsigned char f_opthdr[2]; /* sizeof(optional hdr) */ |
| 61 | unsigned char f_flags[2]; /* flags */ |
| 62 | } xcoff32; |
| 63 | struct |
| 64 | { |
| 65 | unsigned char f_symptr[8]; /* file pointer to symtab */ |
| 66 | unsigned char f_opthdr[2]; /* sizeof(optional hdr) */ |
| 67 | unsigned char f_flags[2]; /* flags */ |
| 68 | unsigned char f_nsyms[4]; /* number of symtab entries */ |
| 69 | } xcoff64; |
| 70 | } u; |
| 71 | }; |
| 72 | |
| 73 | /* Bits for filehdr f_flags field. */ |
| 74 | |
| 75 | #define F_EXEC(0x0002) (0x0002) |
| 76 | |
| 77 | /* The known values of f_magic in an XCOFF file header. */ |
| 78 | |
| 79 | #define U802WRMAGIC0730 0730 /* Writeable text segments. */ |
| 80 | #define U802ROMAGIC0735 0735 /* Readonly sharable text segments. */ |
| 81 | #define U802TOCMAGIC0737 0737 /* Readonly text segments and TOC. */ |
| 82 | #define U803XTOCMAGIC0757 0757 /* Aix 4.3 64-bit XCOFF. */ |
| 83 | #define U64_TOCMAGIC0767 0767 /* AIX 5+ 64-bit XCOFF. */ |
| 84 | |
| 85 | /* XCOFF section header. */ |
| 86 | |
| 87 | struct external_scnhdr |
| 88 | { |
| 89 | unsigned char s_name[8]; /* section name */ |
| 90 | union |
| 91 | { |
| 92 | struct |
| 93 | { |
| 94 | unsigned char s_paddr[4]; /* physical address, aliased s_nlib */ |
| 95 | unsigned char s_vaddr[4]; /* virtual address */ |
| 96 | unsigned char s_size[4]; /* section size */ |
| 97 | unsigned char s_scnptr[4]; /* file ptr to raw data for section */ |
| 98 | unsigned char s_relptr[4]; /* file ptr to relocation */ |
| 99 | unsigned char s_lnnoptr[4]; /* file ptr to line numbers */ |
| 100 | unsigned char s_nreloc[2]; /* number of relocation entries */ |
| 101 | unsigned char s_nlnno[2]; /* number of line number entries */ |
| 102 | unsigned char s_flags[4]; /* flags */ |
| 103 | } xcoff32; |
| 104 | struct |
| 105 | { |
| 106 | unsigned char s_paddr[8]; /* physical address, aliased s_nlib */ |
| 107 | unsigned char s_vaddr[8]; /* virtual address */ |
| 108 | unsigned char s_size[8]; /* section size */ |
| 109 | unsigned char s_scnptr[8]; /* file ptr to raw data for section */ |
| 110 | unsigned char s_relptr[8]; /* file ptr to relocation */ |
| 111 | unsigned char s_lnnoptr[8]; /* file ptr to line numbers */ |
| 112 | unsigned char s_nreloc[4]; /* number of relocation entries */ |
| 113 | unsigned char s_nlnno[4]; /* number of line number entries */ |
| 114 | unsigned char s_flags[4]; /* flags */ |
| 115 | } xcoff64; |
| 116 | } u; |
| 117 | }; |
| 118 | |
| 119 | #define SCNHSZ32(40) (40) |
| 120 | #define SCNHSZ64(68) (68) |
| 121 | |
| 122 | /* The length of the s_name field in struct external_scnhdr. */ |
| 123 | |
| 124 | #define SCNNMLEN(8) (8) |
| 125 | |
| 126 | /* Bits for scnhdr s_flags field. */ |
| 127 | |
| 128 | #define STYP_DATA0x40 0x40 |
| 129 | |
| 130 | /* XCOFF symbol table entry. */ |
| 131 | |
| 132 | |
| 133 | #define N_SYMNMLEN(8) (8) /* # characters in a symbol name */ |
| 134 | |
| 135 | /* The format of an XCOFF symbol-table entry. */ |
| 136 | struct external_syment |
| 137 | { |
| 138 | union { |
| 139 | struct { |
| 140 | union { |
| 141 | /* The name of the symbol. There is an implicit null character |
| 142 | after the end of the array. */ |
| 143 | char n_name[N_SYMNMLEN(8)]; |
| 144 | struct { |
| 145 | /* If n_zeroes is zero, n_offset is the offset the name from |
| 146 | the start of the string table. */ |
| 147 | unsigned char n_zeroes[4]; |
| 148 | unsigned char n_offset[4]; |
| 149 | } n; |
| 150 | } n; |
| 151 | |
| 152 | /* The symbol's value. */ |
| 153 | unsigned char n_value[4]; |
| 154 | } xcoff32; |
| 155 | struct { |
| 156 | /* The symbol's value. */ |
| 157 | unsigned char n_value[8]; |
| 158 | |
| 159 | /* The offset of the symbol from the start of the string table. */ |
| 160 | unsigned char n_offset[4]; |
| 161 | } xcoff64; |
| 162 | } u; |
| 163 | |
| 164 | /* The number of the section to which this symbol belongs. */ |
| 165 | unsigned char n_scnum[2]; |
| 166 | |
| 167 | /* The type of symbol. (It can be interpreted as an n_lang |
| 168 | and an n_cpu byte, but we don't care about that here.) */ |
| 169 | unsigned char n_type[2]; |
| 170 | |
| 171 | /* The class of symbol (a C_* value). */ |
| 172 | unsigned char n_sclass[1]; |
| 173 | |
| 174 | /* The number of auxiliary symbols attached to this entry. */ |
| 175 | unsigned char n_numaux[1]; |
| 176 | }; |
| 177 | |
| 178 | #define SYMESZ(18) (18) |
| 179 | |
| 180 | /* Length allowed for filename in aux sym format 4. */ |
| 181 | |
| 182 | #define FILNMLEN(14) (14) |
| 183 | |
| 184 | /* Omits x_sym and other unused variants. */ |
| 185 | |
| 186 | union external_auxent |
| 187 | { |
| 188 | /* Aux sym format 4: file. */ |
| 189 | union |
| 190 | { |
| 191 | char x_fname[FILNMLEN(14)]; |
| 192 | struct |
| 193 | { |
| 194 | unsigned char x_zeroes[4]; |
| 195 | unsigned char x_offset[4]; |
| 196 | unsigned char x_pad[FILNMLEN(14)-8]; |
| 197 | unsigned char x_ftype; |
| 198 | } _x; |
| 199 | } x_file; |
| 200 | /* Aux sym format 5: section. */ |
| 201 | struct |
| 202 | { |
| 203 | unsigned char x_scnlen[4]; /* section length */ |
| 204 | unsigned char x_nreloc[2]; /* # relocation entries */ |
| 205 | unsigned char x_nlinno[2]; /* # line numbers */ |
| 206 | } x_scn; |
| 207 | /* CSECT auxiliary entry. */ |
| 208 | union |
| 209 | { |
| 210 | struct |
| 211 | { |
| 212 | struct |
| 213 | { |
| 214 | unsigned char x_scnlen[4]; /* csect length */ |
| 215 | unsigned char x_parmhash[4]; /* parm type hash index */ |
| 216 | unsigned char x_snhash[2]; /* sect num with parm hash */ |
| 217 | unsigned char x_smtyp; /* symbol align and type */ |
| 218 | unsigned char x_smclas; /* storage mapping class */ |
| 219 | unsigned char x_stab; /* dbx stab info index */ |
| 220 | unsigned char x_snstab[2]; /* sect num with dbx stab */ |
| 221 | } x_csect; |
| 222 | } xcoff32; |
| 223 | struct |
| 224 | { |
| 225 | struct |
| 226 | { |
| 227 | unsigned char x_scnlen_lo[4]; /* csect length */ |
| 228 | unsigned char x_parmhash[4]; /* parm type hash index */ |
| 229 | unsigned char x_snhash[2]; /* sect num with parm hash */ |
| 230 | unsigned char x_smtyp; /* symbol align and type */ |
| 231 | unsigned char x_smclas; /* storage mapping class */ |
| 232 | unsigned char x_scnlen_hi[4]; |
| 233 | unsigned char pad; |
| 234 | unsigned char x_auxtype; |
| 235 | } x_csect; |
| 236 | } xcoff64; |
| 237 | } u; |
| 238 | /* SECTION/DWARF auxiliary entry. */ |
| 239 | struct |
| 240 | { |
| 241 | unsigned char x_scnlen[4]; /* section length */ |
| 242 | unsigned char pad1[4]; |
| 243 | unsigned char x_nreloc[4]; /* number RLDs */ |
| 244 | } x_sect; |
| 245 | }; |
| 246 | |
| 247 | /* Symbol-related constants. */ |
| 248 | |
| 249 | #define N_DEBUG(-2) (-2) |
| 250 | #define IMAGE_SYM_TYPE_NULL(0) (0) |
| 251 | #define IMAGE_SYM_DTYPE_NULL(0) (0) |
| 252 | #define IMAGE_SYM_CLASS_STATIC(3) (3) |
| 253 | #define IMAGE_SYM_CLASS_FILE(103) (103) |
| 254 | |
| 255 | #define IMAGE_SYM_TYPE(((0) << 4) | (0)) \ |
| 256 | ((IMAGE_SYM_DTYPE_NULL(0) << 4) | IMAGE_SYM_TYPE_NULL(0)) |
| 257 | |
| 258 | #define C_EXT(2) (2) |
| 259 | #define C_STAT(3) (3) |
| 260 | #define C_FILE(103) (103) |
| 261 | #define C_HIDEXT(107) (107) |
| 262 | |
| 263 | #define XTY_SD(1) (1) /* section definition */ |
| 264 | |
| 265 | #define XMC_XO(7) (7) /* extended operation */ |
| 266 | |
| 267 | /* Private data for an simple_object_read. */ |
| 268 | |
| 269 | struct simple_object_xcoff_read |
| 270 | { |
| 271 | /* Magic number. */ |
| 272 | unsigned short magic; |
| 273 | /* Number of sections. */ |
| 274 | unsigned short nscns; |
| 275 | /* File offset of symbol table. */ |
| 276 | off_t symptr; |
| 277 | /* Number of symbol table entries. */ |
| 278 | unsigned int nsyms; |
| 279 | /* Flags. */ |
| 280 | unsigned short flags; |
| 281 | /* Offset of section headers in file. */ |
| 282 | off_t scnhdr_offset; |
| 283 | }; |
| 284 | |
| 285 | /* Private data for an simple_object_attributes. */ |
| 286 | |
| 287 | struct simple_object_xcoff_attributes |
| 288 | { |
| 289 | /* Magic number. */ |
| 290 | unsigned short magic; |
| 291 | /* Flags. */ |
| 292 | unsigned short flags; |
| 293 | }; |
| 294 | |
| 295 | /* See if we have a XCOFF file. */ |
| 296 | |
| 297 | static void * |
| 298 | simple_object_xcoff_match (unsigned char header[SIMPLE_OBJECT_MATCH_HEADER_LEN(16)], |
| 299 | int descriptor, off_t offset, |
| 300 | const char *segment_name ATTRIBUTE_UNUSED__attribute__ ((__unused__)), |
| 301 | const char **errmsg, int *err) |
| 302 | { |
| 303 | unsigned short magic; |
| 304 | unsigned short (*fetch_16) (const unsigned char *); |
| 305 | unsigned int (*fetch_32) (const unsigned char *); |
| 306 | ulong_type (*fetch_64) (const unsigned char *); |
| 307 | unsigned char hdrbuf[sizeof (struct external_filehdr)]; |
| 308 | struct simple_object_xcoff_read *ocr; |
| 309 | int u64; |
| 310 | |
| 311 | magic = simple_object_fetch_big_16 (header); |
| 312 | |
| 313 | if (magic != U802TOCMAGIC0737 && magic != U64_TOCMAGIC0767) |
| 314 | { |
| 315 | *errmsg = NULL((void*)0); |
| 316 | *err = 0; |
| 317 | return NULL((void*)0); |
| 318 | } |
| 319 | |
| 320 | fetch_16 = simple_object_fetch_big_16; |
| 321 | fetch_32 = simple_object_fetch_big_32; |
| 322 | fetch_64 = simple_object_fetch_big_64; |
| 323 | |
| 324 | if (!simple_object_internal_read (descriptor, offset, hdrbuf, sizeof hdrbuf, |
| 325 | errmsg, err)) |
| 326 | return NULL((void*)0); |
| 327 | |
| 328 | u64 = magic == U64_TOCMAGIC0767; |
| 329 | |
| 330 | ocr = XNEW (struct simple_object_xcoff_read)((struct simple_object_xcoff_read *) xmalloc (sizeof (struct simple_object_xcoff_read ))); |
| 331 | ocr->magic = magic; |
| 332 | ocr->nscns = fetch_16 (hdrbuf + offsetof (struct external_filehdr, f_nscns)__builtin_offsetof(struct external_filehdr, f_nscns)); |
| 333 | if (u64) |
| 334 | { |
| 335 | ocr->symptr = fetch_64 (hdrbuf |
| 336 | + offsetof (struct external_filehdr,__builtin_offsetof(struct external_filehdr, u.xcoff64.f_symptr ) |
| 337 | u.xcoff64.f_symptr)__builtin_offsetof(struct external_filehdr, u.xcoff64.f_symptr )); |
| 338 | ocr->nsyms = fetch_32 (hdrbuf + offsetof (struct external_filehdr,__builtin_offsetof(struct external_filehdr, u.xcoff64.f_nsyms ) |
| 339 | u.xcoff64.f_nsyms)__builtin_offsetof(struct external_filehdr, u.xcoff64.f_nsyms )); |
| 340 | ocr->scnhdr_offset = (sizeof (struct external_filehdr) |
| 341 | + fetch_16 (hdrbuf + offsetof (struct external_filehdr,__builtin_offsetof(struct external_filehdr, u.xcoff64.f_opthdr ) |
| 342 | u.xcoff64.f_opthdr)__builtin_offsetof(struct external_filehdr, u.xcoff64.f_opthdr ))); |
| 343 | |
| 344 | } |
| 345 | else |
| 346 | { |
| 347 | ocr->symptr = fetch_32 (hdrbuf |
| 348 | + offsetof (struct external_filehdr,__builtin_offsetof(struct external_filehdr, u.xcoff32.f_symptr ) |
| 349 | u.xcoff32.f_symptr)__builtin_offsetof(struct external_filehdr, u.xcoff32.f_symptr )); |
| 350 | ocr->nsyms = fetch_32 (hdrbuf + offsetof (struct external_filehdr,__builtin_offsetof(struct external_filehdr, u.xcoff32.f_nsyms ) |
| 351 | u.xcoff32.f_nsyms)__builtin_offsetof(struct external_filehdr, u.xcoff32.f_nsyms )); |
| 352 | ocr->scnhdr_offset = (sizeof (struct external_filehdr) - 4 |
| 353 | + fetch_16 (hdrbuf + offsetof (struct external_filehdr,__builtin_offsetof(struct external_filehdr, u.xcoff32.f_opthdr ) |
| 354 | u.xcoff32.f_opthdr)__builtin_offsetof(struct external_filehdr, u.xcoff32.f_opthdr ))); |
| 355 | |
| 356 | } |
| 357 | |
| 358 | return (void *) ocr; |
| 359 | } |
| 360 | |
| 361 | /* Read the string table in a XCOFF file. */ |
| 362 | |
| 363 | static char * |
| 364 | simple_object_xcoff_read_strtab (simple_object_read *sobj, size_t *strtab_size, |
| 365 | const char **errmsg, int *err) |
| 366 | { |
| 367 | struct simple_object_xcoff_read *ocr = |
| 368 | (struct simple_object_xcoff_read *) sobj->data; |
| 369 | off_t strtab_offset; |
| 370 | unsigned char strsizebuf[4]; |
| 371 | size_t strsize; |
| 372 | char *strtab; |
| 373 | |
| 374 | strtab_offset = sobj->offset + ocr->symptr |
| 375 | + ocr->nsyms * SYMESZ(18); |
| 376 | if (!simple_object_internal_read (sobj->descriptor, strtab_offset, |
| 377 | strsizebuf, 4, errmsg, err)) |
| 378 | return NULL((void*)0); |
| 379 | strsize = simple_object_fetch_big_32 (strsizebuf); |
| 380 | strtab = XNEWVEC (char, strsize)((char *) xmalloc (sizeof (char) * (strsize))); |
| 381 | if (!simple_object_internal_read (sobj->descriptor, strtab_offset, |
| 382 | (unsigned char *) strtab, strsize, errmsg, |
| 383 | err)) |
| 384 | { |
| 385 | XDELETEVEC (strtab)free ((void*) (strtab)); |
| 386 | return NULL((void*)0); |
| 387 | } |
| 388 | *strtab_size = strsize; |
| 389 | return strtab; |
| 390 | } |
| 391 | |
| 392 | /* Find all sections in a XCOFF file. */ |
| 393 | |
| 394 | static const char * |
| 395 | simple_object_xcoff_find_sections (simple_object_read *sobj, |
| 396 | int (*pfn) (void *, const char *, |
| 397 | off_t offset, off_t length), |
| 398 | void *data, |
| 399 | int *err) |
| 400 | { |
| 401 | struct simple_object_xcoff_read *ocr = |
| 402 | (struct simple_object_xcoff_read *) sobj->data; |
| 403 | int u64 = ocr->magic == U64_TOCMAGIC0767; |
| 404 | size_t scnhdr_size; |
| 405 | unsigned char *scnbuf; |
| 406 | const char *errmsg; |
| 407 | unsigned short (*fetch_16) (const unsigned char *); |
| 408 | unsigned int (*fetch_32) (const unsigned char *); |
| 409 | ulong_type (*fetch_64) (const unsigned char *); |
| 410 | unsigned int nscns; |
| 411 | char *strtab; |
| 412 | size_t strtab_size; |
| 413 | struct external_syment *symtab = NULL((void*)0); |
| 414 | unsigned int i; |
| 415 | |
| 416 | scnhdr_size = u64 ? SCNHSZ64(68) : SCNHSZ32(40); |
| 417 | scnbuf = XNEWVEC (unsigned char, scnhdr_size * ocr->nscns)((unsigned char *) xmalloc (sizeof (unsigned char) * (scnhdr_size * ocr->nscns))); |
| 418 | if (!simple_object_internal_read (sobj->descriptor, |
| 419 | sobj->offset + ocr->scnhdr_offset, |
| 420 | scnbuf, scnhdr_size * ocr->nscns, &errmsg, |
| 421 | err)) |
| 422 | { |
| 423 | XDELETEVEC (scnbuf)free ((void*) (scnbuf)); |
| 424 | return errmsg; |
| 425 | } |
| 426 | |
| 427 | fetch_16 = simple_object_fetch_big_16; |
| 428 | fetch_32 = simple_object_fetch_big_32; |
| 429 | fetch_64 = simple_object_fetch_big_64; |
| 430 | |
| 431 | nscns = ocr->nscns; |
| 432 | strtab = NULL((void*)0); |
| 433 | strtab_size = 0; |
| 434 | for (i = 0; i < nscns; ++i) |
| 435 | { |
| 436 | unsigned char *scnhdr; |
| 437 | unsigned char *scnname; |
| 438 | char namebuf[SCNNMLEN(8) + 1]; |
| 439 | char *name; |
| 440 | off_t scnptr; |
| 441 | off_t size; |
| 442 | |
| 443 | scnhdr = scnbuf + i * scnhdr_size; |
| 444 | scnname = scnhdr + offsetof (struct external_scnhdr, s_name)__builtin_offsetof(struct external_scnhdr, s_name); |
| 445 | memcpy (namebuf, scnname, SCNNMLEN(8)); |
| 446 | namebuf[SCNNMLEN(8)] = '\0'; |
| 447 | name = &namebuf[0]; |
| 448 | if (namebuf[0] == '/') |
| 449 | { |
| 450 | size_t strindex; |
| 451 | char *end; |
| 452 | |
| 453 | strindex = strtol (namebuf + 1, &end, 10); |
| 454 | if (*end == '\0') |
| 455 | { |
| 456 | /* The real section name is found in the string |
| 457 | table. */ |
| 458 | if (strtab == NULL((void*)0)) |
| 459 | { |
| 460 | strtab = simple_object_xcoff_read_strtab (sobj, |
| 461 | &strtab_size, |
| 462 | &errmsg, err); |
| 463 | if (strtab == NULL((void*)0)) |
| 464 | { |
| 465 | XDELETEVEC (scnbuf)free ((void*) (scnbuf)); |
| 466 | return errmsg; |
| 467 | } |
| 468 | } |
| 469 | |
| 470 | if (strindex < 4 || strindex >= strtab_size) |
| 471 | { |
| 472 | XDELETEVEC (strtab)free ((void*) (strtab)); |
| 473 | XDELETEVEC (scnbuf)free ((void*) (scnbuf)); |
| 474 | *err = 0; |
| 475 | return "section string index out of range"; |
| 476 | } |
| 477 | |
| 478 | name = strtab + strindex; |
| 479 | } |
| 480 | } |
| 481 | |
| 482 | if (u64) |
| 483 | { |
| 484 | scnptr = fetch_64 (scnhdr + offsetof (struct external_scnhdr,__builtin_offsetof(struct external_scnhdr, u.xcoff64.s_scnptr ) |
| 485 | u.xcoff64.s_scnptr)__builtin_offsetof(struct external_scnhdr, u.xcoff64.s_scnptr )); |
| 486 | size = fetch_64 (scnhdr + offsetof (struct external_scnhdr,__builtin_offsetof(struct external_scnhdr, u.xcoff64.s_size) |
| 487 | u.xcoff64.s_size)__builtin_offsetof(struct external_scnhdr, u.xcoff64.s_size)); |
| 488 | } |
| 489 | else |
| 490 | { |
| 491 | scnptr = fetch_32 (scnhdr + offsetof (struct external_scnhdr,__builtin_offsetof(struct external_scnhdr, u.xcoff32.s_scnptr ) |
| 492 | u.xcoff32.s_scnptr)__builtin_offsetof(struct external_scnhdr, u.xcoff32.s_scnptr )); |
| 493 | size = fetch_32 (scnhdr + offsetof (struct external_scnhdr,__builtin_offsetof(struct external_scnhdr, u.xcoff32.s_size) |
| 494 | u.xcoff32.s_size)__builtin_offsetof(struct external_scnhdr, u.xcoff32.s_size)); |
| 495 | } |
| 496 | |
| 497 | if (!(*pfn) (data, name, scnptr, size)) |
| 498 | break; |
| 499 | } |
| 500 | |
| 501 | /* Special handling for .go_export csect. */ |
| 502 | if (ocr->nsyms > 0) |
| 503 | { |
| 504 | unsigned char *sym; |
| 505 | const char *n_name; |
| 506 | off_t size, n_value; |
| 507 | unsigned int n_numaux, n_offset, n_zeroes; |
| 508 | short n_scnum; |
| 509 | |
| 510 | /* Read symbol table. */ |
| 511 | symtab = XNEWVEC (struct external_syment, ocr->nsyms * SYMESZ)((struct external_syment *) xmalloc (sizeof (struct external_syment ) * (ocr->nsyms * (18)))); |
| 512 | if (!simple_object_internal_read (sobj->descriptor, |
| 513 | sobj->offset + ocr->symptr, |
| 514 | (unsigned char *) symtab, |
| 515 | ocr->nsyms * SYMESZ(18), |
| 516 | &errmsg, err)) |
| 517 | { |
| 518 | XDELETEVEC (symtab)free ((void*) (symtab)); |
| 519 | XDELETEVEC (scnbuf)free ((void*) (scnbuf)); |
| 520 | return NULL((void*)0); |
| 521 | } |
| 522 | |
| 523 | /* Search in symbol table if we have a ".go_export" symbol. */ |
| 524 | for (i = 0; i < ocr->nsyms; i += n_numaux + 1) |
| 525 | { |
| 526 | sym = (unsigned char *) &symtab[i]; |
| 527 | n_numaux = symtab[i].n_numaux[0]; |
| 528 | |
| 529 | if (symtab[i].n_sclass[0] != C_EXT(2) |
| 530 | && symtab[i].n_sclass[0] != C_HIDEXT(107)) |
| 531 | continue; |
| 532 | |
| 533 | /* Must have at least one csect auxiliary entry. */ |
| 534 | if (n_numaux < 1 || i + n_numaux >= ocr->nsyms) |
| 535 | continue; |
| 536 | |
| 537 | n_scnum = fetch_16 (sym + offsetof (struct external_syment,__builtin_offsetof(struct external_syment, n_scnum) |
| 538 | n_scnum)__builtin_offsetof(struct external_syment, n_scnum)); |
| 539 | if (n_scnum < 1 || (unsigned int) n_scnum > nscns) |
| 540 | continue; |
| 541 | |
| 542 | if (u64) |
| 543 | { |
| 544 | n_value = fetch_64 (sym + offsetof (struct external_syment,__builtin_offsetof(struct external_syment, u.xcoff64.n_value) |
| 545 | u.xcoff64.n_value)__builtin_offsetof(struct external_syment, u.xcoff64.n_value)); |
| 546 | n_offset = fetch_32 (sym + offsetof (struct external_syment,__builtin_offsetof(struct external_syment, u.xcoff64.n_offset ) |
| 547 | u.xcoff64.n_offset)__builtin_offsetof(struct external_syment, u.xcoff64.n_offset )); |
| 548 | } |
| 549 | else |
| 550 | { |
| 551 | /* ".go_export" is longer than N_SYMNMLEN. */ |
| 552 | n_zeroes = fetch_32 (sym + offsetof (struct external_syment,__builtin_offsetof(struct external_syment, u.xcoff32.n.n.n_zeroes ) |
| 553 | u.xcoff32.n.n.n_zeroes)__builtin_offsetof(struct external_syment, u.xcoff32.n.n.n_zeroes )); |
| 554 | if (n_zeroes != 0) |
| 555 | continue; |
| 556 | |
| 557 | n_value = fetch_32 (sym + offsetof (struct external_syment,__builtin_offsetof(struct external_syment, u.xcoff32.n_value) |
| 558 | u.xcoff32.n_value)__builtin_offsetof(struct external_syment, u.xcoff32.n_value)); |
| 559 | n_offset = fetch_32 (sym + offsetof (struct external_syment,__builtin_offsetof(struct external_syment, u.xcoff32.n.n.n_offset ) |
| 560 | u.xcoff32.n.n.n_offset)__builtin_offsetof(struct external_syment, u.xcoff32.n.n.n_offset )); |
| 561 | } |
| 562 | |
| 563 | /* The real symbol name is found in the string table. */ |
| 564 | if (strtab == NULL((void*)0)) |
| 565 | { |
| 566 | strtab = simple_object_xcoff_read_strtab (sobj, |
| 567 | &strtab_size, |
| 568 | &errmsg, err); |
| 569 | if (strtab == NULL((void*)0)) |
| 570 | { |
| 571 | XDELETEVEC (symtab)free ((void*) (symtab)); |
| 572 | XDELETEVEC (scnbuf)free ((void*) (scnbuf)); |
| 573 | return errmsg; |
| 574 | } |
| 575 | } |
| 576 | |
| 577 | if (n_offset >= strtab_size) |
| 578 | { |
| 579 | XDELETEVEC (strtab)free ((void*) (strtab)); |
| 580 | XDELETEVEC (symtab)free ((void*) (symtab)); |
| 581 | XDELETEVEC (scnbuf)free ((void*) (scnbuf)); |
| 582 | *err = 0; |
| 583 | return "symbol string index out of range"; |
| 584 | } |
| 585 | n_name = strtab + n_offset; |
| 586 | |
| 587 | if (!strcmp (n_name, ".go_export")) |
| 588 | { |
| 589 | union external_auxent *auxent; |
| 590 | unsigned char *aux, *scnhdr; |
| 591 | off_t scnptr, x_scnlen; |
| 592 | |
| 593 | /* Found .go_export symbol, read its csect auxiliary entry. |
| 594 | By convention, it is the last auxiliary entry. */ |
| 595 | auxent = (union external_auxent *) &symtab[i + n_numaux]; |
| 596 | aux = (unsigned char *) auxent; |
| 597 | if (u64) |
| 598 | { |
| 599 | /* Use an intermediate 64-bit type to avoid |
| 600 | compilation warning about 32-bit shift below on |
| 601 | hosts with 32-bit off_t which aren't supported by |
| 602 | AC_SYS_LARGEFILE. */ |
| 603 | ulong_type x_scnlen64; |
| 604 | |
| 605 | if ((auxent->u.xcoff64.x_csect.x_smtyp & 0x7) != XTY_SD(1) |
| 606 | || auxent->u.xcoff64.x_csect.x_smclas != XMC_XO(7)) |
| 607 | continue; |
| 608 | |
| 609 | x_scnlen64 = |
| 610 | fetch_32 (aux + offsetof (union external_auxent,__builtin_offsetof(union external_auxent, u.xcoff64.x_csect.x_scnlen_hi ) |
| 611 | u.xcoff64.x_csect.x_scnlen_hi)__builtin_offsetof(union external_auxent, u.xcoff64.x_csect.x_scnlen_hi )); |
| 612 | x_scnlen = |
| 613 | ((x_scnlen64 << 32) |
| 614 | | fetch_32 (aux |
| 615 | + offsetof (union external_auxent,__builtin_offsetof(union external_auxent, u.xcoff64.x_csect.x_scnlen_lo ) |
| 616 | u.xcoff64.x_csect.x_scnlen_lo)__builtin_offsetof(union external_auxent, u.xcoff64.x_csect.x_scnlen_lo ))); |
| 617 | } |
| 618 | else |
| 619 | { |
| 620 | if ((auxent->u.xcoff32.x_csect.x_smtyp & 0x7) != XTY_SD(1) |
| 621 | || auxent->u.xcoff32.x_csect.x_smclas != XMC_XO(7)) |
| 622 | continue; |
| 623 | |
| 624 | x_scnlen = fetch_32 (aux + offsetof (union external_auxent,__builtin_offsetof(union external_auxent, u.xcoff32.x_csect.x_scnlen ) |
| 625 | u.xcoff32.x_csect.x_scnlen)__builtin_offsetof(union external_auxent, u.xcoff32.x_csect.x_scnlen )); |
| 626 | } |
| 627 | |
| 628 | /* Get header of containing section. */ |
| 629 | scnhdr = scnbuf + (n_scnum - 1) * scnhdr_size; |
| 630 | if (u64) |
| 631 | { |
| 632 | scnptr = fetch_64 (scnhdr + offsetof (struct external_scnhdr,__builtin_offsetof(struct external_scnhdr, u.xcoff64.s_scnptr ) |
| 633 | u.xcoff64.s_scnptr)__builtin_offsetof(struct external_scnhdr, u.xcoff64.s_scnptr )); |
| 634 | size = fetch_64 (scnhdr + offsetof (struct external_scnhdr,__builtin_offsetof(struct external_scnhdr, u.xcoff64.s_size) |
| 635 | u.xcoff64.s_size)__builtin_offsetof(struct external_scnhdr, u.xcoff64.s_size)); |
| 636 | } |
| 637 | else |
| 638 | { |
| 639 | scnptr = fetch_32 (scnhdr + offsetof (struct external_scnhdr,__builtin_offsetof(struct external_scnhdr, u.xcoff32.s_scnptr ) |
| 640 | u.xcoff32.s_scnptr)__builtin_offsetof(struct external_scnhdr, u.xcoff32.s_scnptr )); |
| 641 | size = fetch_32 (scnhdr + offsetof (struct external_scnhdr,__builtin_offsetof(struct external_scnhdr, u.xcoff32.s_size) |
| 642 | u.xcoff32.s_size)__builtin_offsetof(struct external_scnhdr, u.xcoff32.s_size)); |
| 643 | } |
| 644 | if (n_value + x_scnlen > size) |
| 645 | break; |
| 646 | |
| 647 | (*pfn) (data, ".go_export", scnptr + n_value, x_scnlen); |
| 648 | break; |
| 649 | } |
| 650 | } |
| 651 | } |
| 652 | |
| 653 | if (symtab != NULL((void*)0)) |
| 654 | XDELETEVEC (symtab)free ((void*) (symtab)); |
| 655 | if (strtab != NULL((void*)0)) |
| 656 | XDELETEVEC (strtab)free ((void*) (strtab)); |
| 657 | XDELETEVEC (scnbuf)free ((void*) (scnbuf)); |
| 658 | |
| 659 | return NULL((void*)0); |
| 660 | } |
| 661 | |
| 662 | /* Fetch the attributes for an simple_object_read. */ |
| 663 | |
| 664 | static void * |
| 665 | simple_object_xcoff_fetch_attributes (simple_object_read *sobj, |
| 666 | const char **errmsg ATTRIBUTE_UNUSED__attribute__ ((__unused__)), |
| 667 | int *err ATTRIBUTE_UNUSED__attribute__ ((__unused__))) |
| 668 | { |
| 669 | struct simple_object_xcoff_read *ocr = |
| 670 | (struct simple_object_xcoff_read *) sobj->data; |
| 671 | struct simple_object_xcoff_attributes *ret; |
| 672 | |
| 673 | ret = XNEW (struct simple_object_xcoff_attributes)((struct simple_object_xcoff_attributes *) xmalloc (sizeof (struct simple_object_xcoff_attributes))); |
| 674 | ret->magic = ocr->magic; |
| 675 | ret->flags = ocr->flags; |
| 676 | return ret; |
| 677 | } |
| 678 | |
| 679 | /* Release the private data for an simple_object_read. */ |
| 680 | |
| 681 | static void |
| 682 | simple_object_xcoff_release_read (void *data) |
| 683 | { |
| 684 | XDELETE (data)free ((void*) (data)); |
| 685 | } |
| 686 | |
| 687 | /* Compare two attributes structures. */ |
| 688 | |
| 689 | static const char * |
| 690 | simple_object_xcoff_attributes_merge (void *todata, void *fromdata, int *err) |
| 691 | { |
| 692 | struct simple_object_xcoff_attributes *to = |
| 693 | (struct simple_object_xcoff_attributes *) todata; |
| 694 | struct simple_object_xcoff_attributes *from = |
| 695 | (struct simple_object_xcoff_attributes *) fromdata; |
| 696 | |
| 697 | if (to->magic != from->magic) |
| 698 | { |
| 699 | *err = 0; |
| 700 | return "XCOFF object format mismatch"; |
| 701 | } |
| 702 | return NULL((void*)0); |
| 703 | } |
| 704 | |
| 705 | /* Release the private data for an attributes structure. */ |
| 706 | |
| 707 | static void |
| 708 | simple_object_xcoff_release_attributes (void *data) |
| 709 | { |
| 710 | XDELETE (data)free ((void*) (data)); |
| 711 | } |
| 712 | |
| 713 | /* Prepare to write out a file. */ |
| 714 | |
| 715 | static void * |
| 716 | simple_object_xcoff_start_write (void *attributes_data, |
| 717 | const char **errmsg ATTRIBUTE_UNUSED__attribute__ ((__unused__)), |
| 718 | int *err ATTRIBUTE_UNUSED__attribute__ ((__unused__))) |
| 719 | { |
| 720 | struct simple_object_xcoff_attributes *attrs = |
| 721 | (struct simple_object_xcoff_attributes *) attributes_data; |
| 722 | struct simple_object_xcoff_attributes *ret; |
| 723 | |
| 724 | /* We're just going to record the attributes, but we need to make a |
| 725 | copy because the user may delete them. */ |
| 726 | ret = XNEW (struct simple_object_xcoff_attributes)((struct simple_object_xcoff_attributes *) xmalloc (sizeof (struct simple_object_xcoff_attributes))); |
| 727 | *ret = *attrs; |
| 728 | return ret; |
| 729 | } |
| 730 | |
| 731 | /* Write out a XCOFF filehdr. */ |
| 732 | |
| 733 | static int |
| 734 | simple_object_xcoff_write_filehdr (simple_object_write *sobj, int descriptor, |
| 735 | unsigned int nscns, size_t symtab_offset, |
| 736 | unsigned int nsyms, const char **errmsg, |
| 737 | int *err) |
| 738 | { |
| 739 | struct simple_object_xcoff_attributes *attrs = |
| 740 | (struct simple_object_xcoff_attributes *) sobj->data; |
| 741 | int u64 = attrs->magic == U64_TOCMAGIC0767; |
| 742 | unsigned char hdrbuf[sizeof (struct external_filehdr)]; |
| 743 | unsigned char *hdr; |
| 744 | void (*set_16) (unsigned char *, unsigned short); |
| 745 | void (*set_32) (unsigned char *, unsigned int); |
| 746 | void (*set_64) (unsigned char *, ulong_type); |
| 747 | |
| 748 | hdr = &hdrbuf[0]; |
| 749 | |
| 750 | set_16 = simple_object_set_big_16; |
| 751 | set_32 = simple_object_set_big_32; |
| 752 | set_64 = simple_object_set_big_64; |
| 753 | |
| 754 | memset (hdr, 0, sizeof (struct external_filehdr)); |
| 755 | |
| 756 | set_16 (hdr + offsetof (struct external_filehdr, f_magic)__builtin_offsetof(struct external_filehdr, f_magic), attrs->magic); |
| 757 | set_16 (hdr + offsetof (struct external_filehdr, f_nscns)__builtin_offsetof(struct external_filehdr, f_nscns), nscns); |
| 758 | /* f_timdat left as zero. */ |
| 759 | if (u64) |
| 760 | { |
| 761 | set_64 (hdr + offsetof (struct external_filehdr, u.xcoff64.f_symptr)__builtin_offsetof(struct external_filehdr, u.xcoff64.f_symptr ), |
| 762 | symtab_offset); |
| 763 | set_32 (hdr + offsetof (struct external_filehdr, u.xcoff64.f_nsyms)__builtin_offsetof(struct external_filehdr, u.xcoff64.f_nsyms ), |
| 764 | nsyms); |
| 765 | /* f_opthdr left as zero. */ |
| 766 | set_16 (hdr + offsetof (struct external_filehdr, u.xcoff64.f_flags)__builtin_offsetof(struct external_filehdr, u.xcoff64.f_flags ), |
| 767 | attrs->flags); |
| 768 | } |
| 769 | else |
| 770 | { |
| 771 | set_32 (hdr + offsetof (struct external_filehdr, u.xcoff64.f_symptr)__builtin_offsetof(struct external_filehdr, u.xcoff64.f_symptr ), |
| 772 | symtab_offset); |
| 773 | set_32 (hdr + offsetof (struct external_filehdr, u.xcoff64.f_nsyms)__builtin_offsetof(struct external_filehdr, u.xcoff64.f_nsyms ), |
| 774 | nsyms); |
| 775 | /* f_opthdr left as zero. */ |
| 776 | set_16 (hdr + offsetof (struct external_filehdr, u.xcoff64.f_flags)__builtin_offsetof(struct external_filehdr, u.xcoff64.f_flags ), |
| 777 | attrs->flags); |
| 778 | } |
| 779 | |
| 780 | return simple_object_internal_write (descriptor, 0, hdrbuf, |
| 781 | sizeof (struct external_filehdr), |
| 782 | errmsg, err); |
| 783 | } |
| 784 | |
| 785 | /* Write out a XCOFF section header. */ |
| 786 | |
| 787 | static int |
| 788 | simple_object_xcoff_write_scnhdr (simple_object_write *sobj, |
| 789 | int descriptor, |
| 790 | const char *name, size_t *name_offset, |
| 791 | off_t scnhdr_offset, size_t scnsize, |
| 792 | off_t offset, unsigned int align, |
| 793 | const char **errmsg, int *err) |
| 794 | { |
| 795 | struct simple_object_xcoff_read *ocr = |
| 796 | (struct simple_object_xcoff_read *) sobj->data; |
| 797 | int u64 = ocr->magic == U64_TOCMAGIC0767; |
| 798 | void (*set_32) (unsigned char *, unsigned int); |
| 799 | void (*set_64) (unsigned char *, unsigned int); |
| 800 | unsigned char hdrbuf[sizeof (struct external_scnhdr)]; |
| 801 | unsigned char *hdr; |
| 802 | size_t namelen; |
| 803 | unsigned int flags; |
| 804 | |
| 805 | set_32 = simple_object_set_big_32; |
| 806 | set_64 = simple_object_set_big_32; |
| 807 | |
| 808 | memset (hdrbuf, 0, sizeof hdrbuf); |
| 809 | hdr = &hdrbuf[0]; |
| 810 | |
| 811 | namelen = strlen (name); |
| 812 | if (namelen <= SCNNMLEN(8)) |
| 813 | strncpy ((char *) hdr + offsetof (struct external_scnhdr, s_name)__builtin_offsetof(struct external_scnhdr, s_name), |
| 814 | name, SCNNMLEN(8)); |
| 815 | else |
| 816 | { |
| 817 | snprintf ((char *) hdr + offsetof (struct external_scnhdr, s_name)__builtin_offsetof(struct external_scnhdr, s_name), |
| 818 | SCNNMLEN(8), "/%lu", (unsigned long) *name_offset); |
| 819 | *name_offset += namelen + 1; |
| 820 | } |
| 821 | |
| 822 | /* s_paddr left as zero. */ |
| 823 | /* s_vaddr left as zero. */ |
| 824 | if (u64) |
| 825 | { |
| 826 | set_64 (hdr + offsetof (struct external_scnhdr, u.xcoff64.s_size)__builtin_offsetof(struct external_scnhdr, u.xcoff64.s_size), |
| 827 | scnsize); |
| 828 | set_64 (hdr + offsetof (struct external_scnhdr, u.xcoff64.s_scnptr)__builtin_offsetof(struct external_scnhdr, u.xcoff64.s_scnptr ), |
| 829 | offset); |
| 830 | } |
| 831 | else |
| 832 | { |
| 833 | set_32 (hdr + offsetof (struct external_scnhdr, u.xcoff32.s_size)__builtin_offsetof(struct external_scnhdr, u.xcoff32.s_size), |
| 834 | scnsize); |
| 835 | set_32 (hdr + offsetof (struct external_scnhdr, u.xcoff32.s_scnptr)__builtin_offsetof(struct external_scnhdr, u.xcoff32.s_scnptr ), |
| 836 | offset); |
| 837 | } |
| 838 | /* s_relptr left as zero. */ |
| 839 | /* s_lnnoptr left as zero. */ |
| 840 | /* s_nreloc left as zero. */ |
| 841 | /* s_nlnno left as zero. */ |
| 842 | flags = STYP_DATA0x40; |
| 843 | if (align > 13) |
| 844 | align = 13; |
Value stored to 'align' is never read | |
| 845 | if (u64) |
| 846 | set_32 (hdr + offsetof (struct external_scnhdr, u.xcoff64.s_flags)__builtin_offsetof(struct external_scnhdr, u.xcoff64.s_flags), flags); |
| 847 | else |
| 848 | set_32 (hdr + offsetof (struct external_scnhdr, u.xcoff32.s_flags)__builtin_offsetof(struct external_scnhdr, u.xcoff32.s_flags), flags); |
| 849 | |
| 850 | return simple_object_internal_write (descriptor, scnhdr_offset, hdrbuf, |
| 851 | u64 ? SCNHSZ64(68) : SCNHSZ32(40), |
| 852 | errmsg, err); |
| 853 | } |
| 854 | |
| 855 | /* Write out a complete XCOFF file. */ |
| 856 | |
| 857 | static const char * |
| 858 | simple_object_xcoff_write_to_file (simple_object_write *sobj, int descriptor, |
| 859 | int *err) |
| 860 | { |
| 861 | struct simple_object_xcoff_read *ocr = |
| 862 | (struct simple_object_xcoff_read *) sobj->data; |
| 863 | int u64 = ocr->magic == U64_TOCMAGIC0767; |
| 864 | unsigned int nscns, secnum; |
| 865 | simple_object_write_section *section; |
| 866 | off_t scnhdr_offset; |
| 867 | size_t symtab_offset; |
| 868 | off_t secsym_offset; |
| 869 | unsigned int nsyms; |
| 870 | size_t offset; |
| 871 | size_t name_offset; |
| 872 | const char *errmsg; |
| 873 | unsigned char strsizebuf[4]; |
| 874 | /* The interface doesn't give us access to the name of the input file |
| 875 | yet. We want to use its basename for the FILE symbol. This is |
| 876 | what 'gas' uses when told to assemble from stdin. */ |
| 877 | const char *source_filename = "fake"; |
| 878 | size_t sflen; |
| 879 | union |
| 880 | { |
| 881 | struct external_syment sym; |
| 882 | union external_auxent aux; |
| 883 | } syms[2]; |
| 884 | void (*set_16) (unsigned char *, unsigned short); |
| 885 | void (*set_32) (unsigned char *, unsigned int); |
| 886 | |
| 887 | set_16 = simple_object_set_big_16; |
| 888 | set_32 = simple_object_set_big_32; |
| 889 | |
| 890 | nscns = 0; |
| 891 | for (section = sobj->sections; section != NULL((void*)0); section = section->next) |
| 892 | ++nscns; |
| 893 | |
| 894 | scnhdr_offset = sizeof (struct external_filehdr) - (u64 ? 4 : 0); |
| 895 | offset = scnhdr_offset + nscns * (u64 ? SCNHSZ64(68) : SCNHSZ32(40)); |
| 896 | name_offset = 4; |
| 897 | for (section = sobj->sections; section != NULL((void*)0); section = section->next) |
| 898 | { |
| 899 | size_t mask; |
| 900 | size_t new_offset; |
| 901 | size_t scnsize; |
| 902 | struct simple_object_write_section_buffer *buffer; |
| 903 | |
| 904 | mask = (1U << section->align) - 1; |
| 905 | new_offset = offset & mask; |
| 906 | new_offset &= ~ mask; |
| 907 | while (new_offset > offset) |
| 908 | { |
| 909 | unsigned char zeroes[16]; |
| 910 | size_t write; |
| 911 | |
| 912 | memset (zeroes, 0, sizeof zeroes); |
| 913 | write = new_offset - offset; |
| 914 | if (write > sizeof zeroes) |
| 915 | write = sizeof zeroes; |
| 916 | if (!simple_object_internal_write (descriptor, offset, zeroes, write, |
| 917 | &errmsg, err)) |
| 918 | return errmsg; |
| 919 | } |
| 920 | |
| 921 | scnsize = 0; |
| 922 | for (buffer = section->buffers; buffer != NULL((void*)0); buffer = buffer->next) |
| 923 | { |
| 924 | if (!simple_object_internal_write (descriptor, offset + scnsize, |
| 925 | ((const unsigned char *) |
| 926 | buffer->buffer), |
| 927 | buffer->size, &errmsg, err)) |
| 928 | return errmsg; |
| 929 | scnsize += buffer->size; |
| 930 | } |
| 931 | |
| 932 | if (!simple_object_xcoff_write_scnhdr (sobj, descriptor, section->name, |
| 933 | &name_offset, scnhdr_offset, |
| 934 | scnsize, offset, section->align, |
| 935 | &errmsg, err)) |
| 936 | return errmsg; |
| 937 | |
| 938 | scnhdr_offset += u64 ? SCNHSZ64(68) : SCNHSZ32(40); |
| 939 | offset += scnsize; |
| 940 | } |
| 941 | |
| 942 | /* Symbol table is always half-word aligned. */ |
| 943 | offset += (offset & 1); |
| 944 | /* There is a file symbol and a section symbol per section, |
| 945 | and each of these has a single auxiliary symbol following. */ |
| 946 | nsyms = 2 * (nscns + 1); |
| 947 | symtab_offset = offset; |
| 948 | /* Advance across space reserved for symbol table to locate |
| 949 | start of string table. */ |
| 950 | offset += nsyms * SYMESZ(18); |
| 951 | |
| 952 | /* Write out file symbol. */ |
| 953 | memset (&syms[0], 0, sizeof (syms)); |
| 954 | if (!u64) |
| 955 | strcpy ((char *)&syms[0].sym.u.xcoff32.n.n_name[0], ".file"); |
| 956 | set_16 (&syms[0].sym.n_scnum[0], N_DEBUG(-2)); |
| 957 | set_16 (&syms[0].sym.n_type[0], IMAGE_SYM_TYPE(((0) << 4) | (0))); |
| 958 | syms[0].sym.n_sclass[0] = C_FILE(103); |
| 959 | syms[0].sym.n_numaux[0] = 1; |
| 960 | /* The name need not be nul-terminated if it fits into the x_fname field |
| 961 | directly, but must be if it has to be placed into the string table. */ |
| 962 | sflen = strlen (source_filename); |
| 963 | if (sflen <= FILNMLEN(14)) |
| 964 | memcpy (&syms[1].aux.x_file.x_fname[0], source_filename, sflen); |
| 965 | else |
| 966 | { |
| 967 | set_32 (&syms[1].aux.x_file._x.x_offset[0], name_offset); |
| 968 | if (!simple_object_internal_write (descriptor, offset + name_offset, |
| 969 | ((const unsigned char *) |
| 970 | source_filename), |
| 971 | sflen + 1, &errmsg, err)) |
| 972 | return errmsg; |
| 973 | name_offset += strlen (source_filename) + 1; |
| 974 | } |
| 975 | if (!simple_object_internal_write (descriptor, symtab_offset, |
| 976 | (const unsigned char *) &syms[0], |
| 977 | sizeof (syms), &errmsg, err)) |
| 978 | return errmsg; |
| 979 | |
| 980 | /* Write the string table length, followed by the strings and section |
| 981 | symbols in step with each other. */ |
| 982 | set_32 (strsizebuf, name_offset); |
| 983 | if (!simple_object_internal_write (descriptor, offset, strsizebuf, 4, |
| 984 | &errmsg, err)) |
| 985 | return errmsg; |
| 986 | |
| 987 | name_offset = 4; |
| 988 | secsym_offset = symtab_offset + sizeof (syms); |
| 989 | memset (&syms[0], 0, sizeof (syms)); |
| 990 | set_16 (&syms[0].sym.n_type[0], IMAGE_SYM_TYPE(((0) << 4) | (0))); |
| 991 | syms[0].sym.n_sclass[0] = C_STAT(3); |
| 992 | syms[0].sym.n_numaux[0] = 1; |
| 993 | secnum = 1; |
| 994 | |
| 995 | for (section = sobj->sections; section != NULL((void*)0); section = section->next) |
| 996 | { |
| 997 | size_t namelen; |
| 998 | size_t scnsize; |
| 999 | struct simple_object_write_section_buffer *buffer; |
| 1000 | |
| 1001 | namelen = strlen (section->name); |
| 1002 | set_16 (&syms[0].sym.n_scnum[0], secnum++); |
| 1003 | scnsize = 0; |
| 1004 | for (buffer = section->buffers; buffer != NULL((void*)0); buffer = buffer->next) |
| 1005 | scnsize += buffer->size; |
| 1006 | set_32 (&syms[1].aux.x_scn.x_scnlen[0], scnsize); |
| 1007 | if (namelen > SCNNMLEN(8)) |
| 1008 | { |
| 1009 | set_32 (&syms[0].sym.u.xcoff32.n.n.n_zeroes[0], 0); |
| 1010 | set_32 (&syms[0].sym.u.xcoff32.n.n.n_offset[0], name_offset); |
| 1011 | if (!simple_object_internal_write (descriptor, offset + name_offset, |
| 1012 | ((const unsigned char *) |
| 1013 | section->name), |
| 1014 | namelen + 1, &errmsg, err)) |
| 1015 | return errmsg; |
| 1016 | name_offset += namelen + 1; |
| 1017 | } |
| 1018 | else |
| 1019 | { |
| 1020 | memcpy (&syms[0].sym.u.xcoff32.n.n_name[0], section->name, |
| 1021 | strlen (section->name)); |
| 1022 | memset (&syms[0].sym.u.xcoff32.n.n_name[strlen (section->name)], 0, |
| 1023 | N_SYMNMLEN(8) - strlen (section->name)); |
| 1024 | } |
| 1025 | |
| 1026 | if (!simple_object_internal_write (descriptor, secsym_offset, |
| 1027 | (const unsigned char *) &syms[0], |
| 1028 | sizeof (syms), &errmsg, err)) |
| 1029 | return errmsg; |
| 1030 | secsym_offset += sizeof (syms); |
| 1031 | } |
| 1032 | |
| 1033 | if (!simple_object_xcoff_write_filehdr (sobj, descriptor, nscns, |
| 1034 | symtab_offset, nsyms, &errmsg, err)) |
| 1035 | return errmsg; |
| 1036 | |
| 1037 | return NULL((void*)0); |
| 1038 | } |
| 1039 | |
| 1040 | /* Release the private data for an simple_object_write structure. */ |
| 1041 | |
| 1042 | static void |
| 1043 | simple_object_xcoff_release_write (void *data) |
| 1044 | { |
| 1045 | XDELETE (data)free ((void*) (data)); |
| 1046 | } |
| 1047 | |
| 1048 | /* The XCOFF functions. */ |
| 1049 | |
| 1050 | const struct simple_object_functions simple_object_xcoff_functions = |
| 1051 | { |
| 1052 | simple_object_xcoff_match, |
| 1053 | simple_object_xcoff_find_sections, |
| 1054 | simple_object_xcoff_fetch_attributes, |
| 1055 | simple_object_xcoff_release_read, |
| 1056 | simple_object_xcoff_attributes_merge, |
| 1057 | simple_object_xcoff_release_attributes, |
| 1058 | simple_object_xcoff_start_write, |
| 1059 | simple_object_xcoff_write_to_file, |
| 1060 | simple_object_xcoff_release_write, |
| 1061 | NULL((void*)0) |
| 1062 | }; |