1 /* 2 * CDDL HEADER START 3 * 4 * The contents of this file are subject to the terms of the 5 * Common Development and Distribution License (the "License"). 6 * You may not use this file except in compliance with the License. 7 * 8 * You can obtain a copy of the license at usr/src/OPENSOLARIS.LICENSE 9 * or http://www.opensolaris.org/os/licensing. 10 * See the License for the specific language governing permissions 11 * and limitations under the License. 12 * 13 * When distributing Covered Code, include this CDDL HEADER in each 14 * file and include the License file at usr/src/OPENSOLARIS.LICENSE. 15 * If applicable, add the following below this CDDL HEADER, with the 16 * fields enclosed by brackets "[]" replaced with your own identifying 17 * information: Portions Copyright [yyyy] [name of copyright owner] 18 * 19 * CDDL HEADER END 20 */ 21 /* 22 * Copyright 2009 Sun Microsystems, Inc. All rights reserved. 23 * Use is subject to license terms. 24 */ 25 26 #include <sys/types.h> 27 #include <sys/modctl.h> 28 #include <sys/kobj.h> 29 #include <sys/kobj_impl.h> 30 #include <sys/sysmacros.h> 31 #include <sys/elf.h> 32 #include <sys/task.h> 33 34 #include <unistd.h> 35 #include <project.h> 36 #include <strings.h> 37 #include <stdlib.h> 38 #include <libelf.h> 39 #include <limits.h> 40 #include <assert.h> 41 #include <errno.h> 42 #include <dirent.h> 43 44 #include <dt_strtab.h> 45 #include <dt_module.h> 46 #include <dt_impl.h> 47 48 static const char *dt_module_strtab; /* active strtab for qsort callbacks */ 49 50 static void 51 dt_module_symhash_insert(dt_module_t *dmp, const char *name, uint_t id) 52 { 53 dt_sym_t *dsp = &dmp->dm_symchains[dmp->dm_symfree]; 54 uint_t h; 55 56 assert(dmp->dm_symfree < dmp->dm_nsymelems + 1); 57 58 dsp->ds_symid = id; 59 h = dt_strtab_hash(name, NULL) % dmp->dm_nsymbuckets; 60 dsp->ds_next = dmp->dm_symbuckets[h]; 61 dmp->dm_symbuckets[h] = dmp->dm_symfree++; 62 } 63 64 static uint_t 65 dt_module_syminit32(dt_module_t *dmp) 66 { 67 #if STT_NUM != (STT_TLS + 1) 68 #error "STT_NUM has grown. update dt_module_syminit32()" 69 #endif 70 71 const Elf32_Sym *sym = dmp->dm_symtab.cts_data; 72 const char *base = dmp->dm_strtab.cts_data; 73 size_t ss_size = dmp->dm_strtab.cts_size; 74 uint_t i, n = dmp->dm_nsymelems; 75 uint_t asrsv = 0; 76 77 for (i = 0; i < n; i++, sym++) { 78 const char *name = base + sym->st_name; 79 uchar_t type = ELF32_ST_TYPE(sym->st_info); 80 81 if (type >= STT_NUM || type == STT_SECTION) 82 continue; /* skip sections and unknown types */ 83 84 if (sym->st_name == 0 || sym->st_name >= ss_size) 85 continue; /* skip null or invalid names */ 86 87 if (sym->st_value != 0 && 88 (ELF32_ST_BIND(sym->st_info) != STB_LOCAL || sym->st_size)) 89 asrsv++; /* reserve space in the address map */ 90 91 dt_module_symhash_insert(dmp, name, i); 92 } 93 94 return (asrsv); 95 } 96 97 static uint_t 98 dt_module_syminit64(dt_module_t *dmp) 99 { 100 #if STT_NUM != (STT_TLS + 1) 101 #error "STT_NUM has grown. update dt_module_syminit64()" 102 #endif 103 104 const Elf64_Sym *sym = dmp->dm_symtab.cts_data; 105 const char *base = dmp->dm_strtab.cts_data; 106 size_t ss_size = dmp->dm_strtab.cts_size; 107 uint_t i, n = dmp->dm_nsymelems; 108 uint_t asrsv = 0; 109 110 for (i = 0; i < n; i++, sym++) { 111 const char *name = base + sym->st_name; 112 uchar_t type = ELF64_ST_TYPE(sym->st_info); 113 114 if (type >= STT_NUM || type == STT_SECTION) 115 continue; /* skip sections and unknown types */ 116 117 if (sym->st_name == 0 || sym->st_name >= ss_size) 118 continue; /* skip null or invalid names */ 119 120 if (sym->st_value != 0 && 121 (ELF64_ST_BIND(sym->st_info) != STB_LOCAL || sym->st_size)) 122 asrsv++; /* reserve space in the address map */ 123 124 dt_module_symhash_insert(dmp, name, i); 125 } 126 127 return (asrsv); 128 } 129 130 /* 131 * Sort comparison function for 32-bit symbol address-to-name lookups. We sort 132 * symbols by value. If values are equal, we prefer the symbol that is 133 * non-zero sized, typed, not weak, or lexically first, in that order. 134 */ 135 static int 136 dt_module_symcomp32(const void *lp, const void *rp) 137 { 138 Elf32_Sym *lhs = *((Elf32_Sym **)lp); 139 Elf32_Sym *rhs = *((Elf32_Sym **)rp); 140 141 if (lhs->st_value != rhs->st_value) 142 return (lhs->st_value > rhs->st_value ? 1 : -1); 143 144 if ((lhs->st_size == 0) != (rhs->st_size == 0)) 145 return (lhs->st_size == 0 ? 1 : -1); 146 147 if ((ELF32_ST_TYPE(lhs->st_info) == STT_NOTYPE) != 148 (ELF32_ST_TYPE(rhs->st_info) == STT_NOTYPE)) 149 return (ELF32_ST_TYPE(lhs->st_info) == STT_NOTYPE ? 1 : -1); 150 151 if ((ELF32_ST_BIND(lhs->st_info) == STB_WEAK) != 152 (ELF32_ST_BIND(rhs->st_info) == STB_WEAK)) 153 return (ELF32_ST_BIND(lhs->st_info) == STB_WEAK ? 1 : -1); 154 155 return (strcmp(dt_module_strtab + lhs->st_name, 156 dt_module_strtab + rhs->st_name)); 157 } 158 159 /* 160 * Sort comparison function for 64-bit symbol address-to-name lookups. We sort 161 * symbols by value. If values are equal, we prefer the symbol that is 162 * non-zero sized, typed, not weak, or lexically first, in that order. 163 */ 164 static int 165 dt_module_symcomp64(const void *lp, const void *rp) 166 { 167 Elf64_Sym *lhs = *((Elf64_Sym **)lp); 168 Elf64_Sym *rhs = *((Elf64_Sym **)rp); 169 170 if (lhs->st_value != rhs->st_value) 171 return (lhs->st_value > rhs->st_value ? 1 : -1); 172 173 if ((lhs->st_size == 0) != (rhs->st_size == 0)) 174 return (lhs->st_size == 0 ? 1 : -1); 175 176 if ((ELF64_ST_TYPE(lhs->st_info) == STT_NOTYPE) != 177 (ELF64_ST_TYPE(rhs->st_info) == STT_NOTYPE)) 178 return (ELF64_ST_TYPE(lhs->st_info) == STT_NOTYPE ? 1 : -1); 179 180 if ((ELF64_ST_BIND(lhs->st_info) == STB_WEAK) != 181 (ELF64_ST_BIND(rhs->st_info) == STB_WEAK)) 182 return (ELF64_ST_BIND(lhs->st_info) == STB_WEAK ? 1 : -1); 183 184 return (strcmp(dt_module_strtab + lhs->st_name, 185 dt_module_strtab + rhs->st_name)); 186 } 187 188 static void 189 dt_module_symsort32(dt_module_t *dmp) 190 { 191 Elf32_Sym *symtab = (Elf32_Sym *)dmp->dm_symtab.cts_data; 192 Elf32_Sym **sympp = (Elf32_Sym **)dmp->dm_asmap; 193 const dt_sym_t *dsp = dmp->dm_symchains + 1; 194 uint_t i, n = dmp->dm_symfree; 195 196 for (i = 1; i < n; i++, dsp++) { 197 Elf32_Sym *sym = symtab + dsp->ds_symid; 198 if (sym->st_value != 0 && 199 (ELF32_ST_BIND(sym->st_info) != STB_LOCAL || sym->st_size)) 200 *sympp++ = sym; 201 } 202 203 dmp->dm_aslen = (uint_t)(sympp - (Elf32_Sym **)dmp->dm_asmap); 204 assert(dmp->dm_aslen <= dmp->dm_asrsv); 205 206 dt_module_strtab = dmp->dm_strtab.cts_data; 207 qsort(dmp->dm_asmap, dmp->dm_aslen, 208 sizeof (Elf32_Sym *), dt_module_symcomp32); 209 dt_module_strtab = NULL; 210 } 211 212 static void 213 dt_module_symsort64(dt_module_t *dmp) 214 { 215 Elf64_Sym *symtab = (Elf64_Sym *)dmp->dm_symtab.cts_data; 216 Elf64_Sym **sympp = (Elf64_Sym **)dmp->dm_asmap; 217 const dt_sym_t *dsp = dmp->dm_symchains + 1; 218 uint_t i, n = dmp->dm_symfree; 219 220 for (i = 1; i < n; i++, dsp++) { 221 Elf64_Sym *sym = symtab + dsp->ds_symid; 222 if (sym->st_value != 0 && 223 (ELF64_ST_BIND(sym->st_info) != STB_LOCAL || sym->st_size)) 224 *sympp++ = sym; 225 } 226 227 dmp->dm_aslen = (uint_t)(sympp - (Elf64_Sym **)dmp->dm_asmap); 228 assert(dmp->dm_aslen <= dmp->dm_asrsv); 229 230 dt_module_strtab = dmp->dm_strtab.cts_data; 231 qsort(dmp->dm_asmap, dmp->dm_aslen, 232 sizeof (Elf64_Sym *), dt_module_symcomp64); 233 dt_module_strtab = NULL; 234 } 235 236 static GElf_Sym * 237 dt_module_symgelf32(const Elf32_Sym *src, GElf_Sym *dst) 238 { 239 if (dst != NULL) { 240 dst->st_name = src->st_name; 241 dst->st_info = src->st_info; 242 dst->st_other = src->st_other; 243 dst->st_shndx = src->st_shndx; 244 dst->st_value = src->st_value; 245 dst->st_size = src->st_size; 246 } 247 248 return (dst); 249 } 250 251 static GElf_Sym * 252 dt_module_symgelf64(const Elf64_Sym *src, GElf_Sym *dst) 253 { 254 if (dst != NULL) 255 bcopy(src, dst, sizeof (GElf_Sym)); 256 257 return (dst); 258 } 259 260 static GElf_Sym * 261 dt_module_symname32(dt_module_t *dmp, const char *name, 262 GElf_Sym *symp, uint_t *idp) 263 { 264 const Elf32_Sym *symtab = dmp->dm_symtab.cts_data; 265 const char *strtab = dmp->dm_strtab.cts_data; 266 267 const Elf32_Sym *sym; 268 const dt_sym_t *dsp; 269 uint_t i, h; 270 271 if (dmp->dm_nsymelems == 0) 272 return (NULL); 273 274 h = dt_strtab_hash(name, NULL) % dmp->dm_nsymbuckets; 275 276 for (i = dmp->dm_symbuckets[h]; i != 0; i = dsp->ds_next) { 277 dsp = &dmp->dm_symchains[i]; 278 sym = symtab + dsp->ds_symid; 279 280 if (strcmp(name, strtab + sym->st_name) == 0) { 281 if (idp != NULL) 282 *idp = dsp->ds_symid; 283 return (dt_module_symgelf32(sym, symp)); 284 } 285 } 286 287 return (NULL); 288 } 289 290 static GElf_Sym * 291 dt_module_symname64(dt_module_t *dmp, const char *name, 292 GElf_Sym *symp, uint_t *idp) 293 { 294 const Elf64_Sym *symtab = dmp->dm_symtab.cts_data; 295 const char *strtab = dmp->dm_strtab.cts_data; 296 297 const Elf64_Sym *sym; 298 const dt_sym_t *dsp; 299 uint_t i, h; 300 301 if (dmp->dm_nsymelems == 0) 302 return (NULL); 303 304 h = dt_strtab_hash(name, NULL) % dmp->dm_nsymbuckets; 305 306 for (i = dmp->dm_symbuckets[h]; i != 0; i = dsp->ds_next) { 307 dsp = &dmp->dm_symchains[i]; 308 sym = symtab + dsp->ds_symid; 309 310 if (strcmp(name, strtab + sym->st_name) == 0) { 311 if (idp != NULL) 312 *idp = dsp->ds_symid; 313 return (dt_module_symgelf64(sym, symp)); 314 } 315 } 316 317 return (NULL); 318 } 319 320 static GElf_Sym * 321 dt_module_symaddr32(dt_module_t *dmp, GElf_Addr addr, 322 GElf_Sym *symp, uint_t *idp) 323 { 324 const Elf32_Sym **asmap = (const Elf32_Sym **)dmp->dm_asmap; 325 const Elf32_Sym *symtab = dmp->dm_symtab.cts_data; 326 const Elf32_Sym *sym; 327 328 uint_t i, mid, lo = 0, hi = dmp->dm_aslen - 1; 329 Elf32_Addr v; 330 331 if (dmp->dm_aslen == 0) 332 return (NULL); 333 334 while (hi - lo > 1) { 335 mid = (lo + hi) / 2; 336 if (addr >= asmap[mid]->st_value) 337 lo = mid; 338 else 339 hi = mid; 340 } 341 342 i = addr < asmap[hi]->st_value ? lo : hi; 343 sym = asmap[i]; 344 v = sym->st_value; 345 346 /* 347 * If the previous entry has the same value, improve our choice. The 348 * order of equal-valued symbols is determined by the comparison func. 349 */ 350 while (i-- != 0 && asmap[i]->st_value == v) 351 sym = asmap[i]; 352 353 if (addr - sym->st_value < MAX(sym->st_size, 1)) { 354 if (idp != NULL) 355 *idp = (uint_t)(sym - symtab); 356 return (dt_module_symgelf32(sym, symp)); 357 } 358 359 return (NULL); 360 } 361 362 static GElf_Sym * 363 dt_module_symaddr64(dt_module_t *dmp, GElf_Addr addr, 364 GElf_Sym *symp, uint_t *idp) 365 { 366 const Elf64_Sym **asmap = (const Elf64_Sym **)dmp->dm_asmap; 367 const Elf64_Sym *symtab = dmp->dm_symtab.cts_data; 368 const Elf64_Sym *sym; 369 370 uint_t i, mid, lo = 0, hi = dmp->dm_aslen - 1; 371 Elf64_Addr v; 372 373 if (dmp->dm_aslen == 0) 374 return (NULL); 375 376 while (hi - lo > 1) { 377 mid = (lo + hi) / 2; 378 if (addr >= asmap[mid]->st_value) 379 lo = mid; 380 else 381 hi = mid; 382 } 383 384 i = addr < asmap[hi]->st_value ? lo : hi; 385 sym = asmap[i]; 386 v = sym->st_value; 387 388 /* 389 * If the previous entry has the same value, improve our choice. The 390 * order of equal-valued symbols is determined by the comparison func. 391 */ 392 while (i-- != 0 && asmap[i]->st_value == v) 393 sym = asmap[i]; 394 395 if (addr - sym->st_value < MAX(sym->st_size, 1)) { 396 if (idp != NULL) 397 *idp = (uint_t)(sym - symtab); 398 return (dt_module_symgelf64(sym, symp)); 399 } 400 401 return (NULL); 402 } 403 404 static const dt_modops_t dt_modops_32 = { 405 dt_module_syminit32, 406 dt_module_symsort32, 407 dt_module_symname32, 408 dt_module_symaddr32 409 }; 410 411 static const dt_modops_t dt_modops_64 = { 412 dt_module_syminit64, 413 dt_module_symsort64, 414 dt_module_symname64, 415 dt_module_symaddr64 416 }; 417 418 dt_module_t * 419 dt_module_create(dtrace_hdl_t *dtp, const char *name) 420 { 421 uint_t h = dt_strtab_hash(name, NULL) % dtp->dt_modbuckets; 422 dt_module_t *dmp; 423 424 for (dmp = dtp->dt_mods[h]; dmp != NULL; dmp = dmp->dm_next) { 425 if (strcmp(dmp->dm_name, name) == 0) 426 return (dmp); 427 } 428 429 if ((dmp = malloc(sizeof (dt_module_t))) == NULL) 430 return (NULL); /* caller must handle allocation failure */ 431 432 bzero(dmp, sizeof (dt_module_t)); 433 (void) strlcpy(dmp->dm_name, name, sizeof (dmp->dm_name)); 434 dt_list_append(&dtp->dt_modlist, dmp); 435 dmp->dm_next = dtp->dt_mods[h]; 436 dtp->dt_mods[h] = dmp; 437 dtp->dt_nmods++; 438 439 if (dtp->dt_conf.dtc_ctfmodel == CTF_MODEL_LP64) 440 dmp->dm_ops = &dt_modops_64; 441 else 442 dmp->dm_ops = &dt_modops_32; 443 444 return (dmp); 445 } 446 447 dt_module_t * 448 dt_module_lookup_by_name(dtrace_hdl_t *dtp, const char *name) 449 { 450 uint_t h = dt_strtab_hash(name, NULL) % dtp->dt_modbuckets; 451 dt_module_t *dmp; 452 453 for (dmp = dtp->dt_mods[h]; dmp != NULL; dmp = dmp->dm_next) { 454 if (strcmp(dmp->dm_name, name) == 0) 455 return (dmp); 456 } 457 458 return (NULL); 459 } 460 461 /*ARGSUSED*/ 462 dt_module_t * 463 dt_module_lookup_by_ctf(dtrace_hdl_t *dtp, ctf_file_t *ctfp) 464 { 465 return (ctfp ? ctf_getspecific(ctfp) : NULL); 466 } 467 468 static int 469 dt_module_load_sect(dtrace_hdl_t *dtp, dt_module_t *dmp, ctf_sect_t *ctsp) 470 { 471 const char *s; 472 size_t shstrs; 473 GElf_Shdr sh; 474 Elf_Data *dp; 475 Elf_Scn *sp; 476 477 if (elf_getshdrstrndx(dmp->dm_elf, &shstrs) == -1) 478 return (dt_set_errno(dtp, EDT_NOTLOADED)); 479 480 for (sp = NULL; (sp = elf_nextscn(dmp->dm_elf, sp)) != NULL; ) { 481 if (gelf_getshdr(sp, &sh) == NULL || sh.sh_type == SHT_NULL || 482 (s = elf_strptr(dmp->dm_elf, shstrs, sh.sh_name)) == NULL) 483 continue; /* skip any malformed sections */ 484 485 if (sh.sh_type == ctsp->cts_type && 486 sh.sh_entsize == ctsp->cts_entsize && 487 strcmp(s, ctsp->cts_name) == 0) 488 break; /* section matches specification */ 489 } 490 491 /* 492 * If the section isn't found, return success but leave cts_data set 493 * to NULL and cts_size set to zero for our caller. 494 */ 495 if (sp == NULL || (dp = elf_getdata(sp, NULL)) == NULL) 496 return (0); 497 498 ctsp->cts_data = dp->d_buf; 499 ctsp->cts_size = dp->d_size; 500 501 dt_dprintf("loaded %s [%s] (%lu bytes)\n", 502 dmp->dm_name, ctsp->cts_name, (ulong_t)ctsp->cts_size); 503 504 return (0); 505 } 506 507 int 508 dt_module_load(dtrace_hdl_t *dtp, dt_module_t *dmp) 509 { 510 if (dmp->dm_flags & DT_DM_LOADED) 511 return (0); /* module is already loaded */ 512 513 dmp->dm_ctdata.cts_name = ".SUNW_ctf"; 514 dmp->dm_ctdata.cts_type = SHT_PROGBITS; 515 dmp->dm_ctdata.cts_flags = 0; 516 dmp->dm_ctdata.cts_data = NULL; 517 dmp->dm_ctdata.cts_size = 0; 518 dmp->dm_ctdata.cts_entsize = 0; 519 dmp->dm_ctdata.cts_offset = 0; 520 521 dmp->dm_symtab.cts_name = ".symtab"; 522 dmp->dm_symtab.cts_type = SHT_SYMTAB; 523 dmp->dm_symtab.cts_flags = 0; 524 dmp->dm_symtab.cts_data = NULL; 525 dmp->dm_symtab.cts_size = 0; 526 dmp->dm_symtab.cts_entsize = dmp->dm_ops == &dt_modops_64 ? 527 sizeof (Elf64_Sym) : sizeof (Elf32_Sym); 528 dmp->dm_symtab.cts_offset = 0; 529 530 dmp->dm_strtab.cts_name = ".strtab"; 531 dmp->dm_strtab.cts_type = SHT_STRTAB; 532 dmp->dm_strtab.cts_flags = 0; 533 dmp->dm_strtab.cts_data = NULL; 534 dmp->dm_strtab.cts_size = 0; 535 dmp->dm_strtab.cts_entsize = 0; 536 dmp->dm_strtab.cts_offset = 0; 537 538 /* 539 * Attempt to load the module's CTF section, symbol table section, and 540 * string table section. Note that modules may not contain CTF data: 541 * this will result in a successful load_sect but data of size zero. 542 * We will then fail if dt_module_getctf() is called, as shown below. 543 */ 544 if (dt_module_load_sect(dtp, dmp, &dmp->dm_ctdata) == -1 || 545 dt_module_load_sect(dtp, dmp, &dmp->dm_symtab) == -1 || 546 dt_module_load_sect(dtp, dmp, &dmp->dm_strtab) == -1) { 547 dt_module_unload(dtp, dmp); 548 return (-1); /* dt_errno is set for us */ 549 } 550 551 /* 552 * Allocate the hash chains and hash buckets for symbol name lookup. 553 * This is relatively simple since the symbol table is of fixed size 554 * and is known in advance. We allocate one extra element since we 555 * use element indices instead of pointers and zero is our sentinel. 556 */ 557 dmp->dm_nsymelems = 558 dmp->dm_symtab.cts_size / dmp->dm_symtab.cts_entsize; 559 560 dmp->dm_nsymbuckets = _dtrace_strbuckets; 561 dmp->dm_symfree = 1; /* first free element is index 1 */ 562 563 dmp->dm_symbuckets = malloc(sizeof (uint_t) * dmp->dm_nsymbuckets); 564 dmp->dm_symchains = malloc(sizeof (dt_sym_t) * dmp->dm_nsymelems + 1); 565 566 if (dmp->dm_symbuckets == NULL || dmp->dm_symchains == NULL) { 567 dt_module_unload(dtp, dmp); 568 return (dt_set_errno(dtp, EDT_NOMEM)); 569 } 570 571 bzero(dmp->dm_symbuckets, sizeof (uint_t) * dmp->dm_nsymbuckets); 572 bzero(dmp->dm_symchains, sizeof (dt_sym_t) * dmp->dm_nsymelems + 1); 573 574 /* 575 * Iterate over the symbol table data buffer and insert each symbol 576 * name into the name hash if the name and type are valid. Then 577 * allocate the address map, fill it in, and sort it. 578 */ 579 dmp->dm_asrsv = dmp->dm_ops->do_syminit(dmp); 580 581 dt_dprintf("hashed %s [%s] (%u symbols)\n", 582 dmp->dm_name, dmp->dm_symtab.cts_name, dmp->dm_symfree - 1); 583 584 if ((dmp->dm_asmap = malloc(sizeof (void *) * dmp->dm_asrsv)) == NULL) { 585 dt_module_unload(dtp, dmp); 586 return (dt_set_errno(dtp, EDT_NOMEM)); 587 } 588 589 dmp->dm_ops->do_symsort(dmp); 590 591 dt_dprintf("sorted %s [%s] (%u symbols)\n", 592 dmp->dm_name, dmp->dm_symtab.cts_name, dmp->dm_aslen); 593 594 dmp->dm_flags |= DT_DM_LOADED; 595 return (0); 596 } 597 598 ctf_file_t * 599 dt_module_getctf(dtrace_hdl_t *dtp, dt_module_t *dmp) 600 { 601 const char *parent; 602 dt_module_t *pmp; 603 ctf_file_t *pfp; 604 int model; 605 606 if (dmp->dm_ctfp != NULL || dt_module_load(dtp, dmp) != 0) 607 return (dmp->dm_ctfp); 608 609 if (dmp->dm_ops == &dt_modops_64) 610 model = CTF_MODEL_LP64; 611 else 612 model = CTF_MODEL_ILP32; 613 614 /* 615 * If the data model of the module does not match our program data 616 * model, then do not permit CTF from this module to be opened and 617 * returned to the compiler. If we support mixed data models in the 618 * future for combined kernel/user tracing, this can be removed. 619 */ 620 if (dtp->dt_conf.dtc_ctfmodel != model) { 621 (void) dt_set_errno(dtp, EDT_DATAMODEL); 622 return (NULL); 623 } 624 625 if (dmp->dm_ctdata.cts_size == 0) { 626 (void) dt_set_errno(dtp, EDT_NOCTF); 627 return (NULL); 628 } 629 630 dmp->dm_ctfp = ctf_bufopen(&dmp->dm_ctdata, 631 &dmp->dm_symtab, &dmp->dm_strtab, &dtp->dt_ctferr); 632 633 if (dmp->dm_ctfp == NULL) { 634 (void) dt_set_errno(dtp, EDT_CTF); 635 return (NULL); 636 } 637 638 (void) ctf_setmodel(dmp->dm_ctfp, model); 639 ctf_setspecific(dmp->dm_ctfp, dmp); 640 641 if ((parent = ctf_parent_name(dmp->dm_ctfp)) != NULL) { 642 if ((pmp = dt_module_create(dtp, parent)) == NULL || 643 (pfp = dt_module_getctf(dtp, pmp)) == NULL) { 644 if (pmp == NULL) 645 (void) dt_set_errno(dtp, EDT_NOMEM); 646 goto err; 647 } 648 649 if (ctf_import(dmp->dm_ctfp, pfp) == CTF_ERR) { 650 dtp->dt_ctferr = ctf_errno(dmp->dm_ctfp); 651 (void) dt_set_errno(dtp, EDT_CTF); 652 goto err; 653 } 654 } 655 656 dt_dprintf("loaded CTF container for %s (%p)\n", 657 dmp->dm_name, (void *)dmp->dm_ctfp); 658 659 return (dmp->dm_ctfp); 660 661 err: 662 ctf_close(dmp->dm_ctfp); 663 dmp->dm_ctfp = NULL; 664 return (NULL); 665 } 666 667 /*ARGSUSED*/ 668 void 669 dt_module_unload(dtrace_hdl_t *dtp, dt_module_t *dmp) 670 { 671 ctf_close(dmp->dm_ctfp); 672 dmp->dm_ctfp = NULL; 673 674 bzero(&dmp->dm_ctdata, sizeof (ctf_sect_t)); 675 bzero(&dmp->dm_symtab, sizeof (ctf_sect_t)); 676 bzero(&dmp->dm_strtab, sizeof (ctf_sect_t)); 677 678 if (dmp->dm_symbuckets != NULL) { 679 free(dmp->dm_symbuckets); 680 dmp->dm_symbuckets = NULL; 681 } 682 683 if (dmp->dm_symchains != NULL) { 684 free(dmp->dm_symchains); 685 dmp->dm_symchains = NULL; 686 } 687 688 if (dmp->dm_asmap != NULL) { 689 free(dmp->dm_asmap); 690 dmp->dm_asmap = NULL; 691 } 692 693 dmp->dm_symfree = 0; 694 dmp->dm_nsymbuckets = 0; 695 dmp->dm_nsymelems = 0; 696 dmp->dm_asrsv = 0; 697 dmp->dm_aslen = 0; 698 699 dmp->dm_text_va = NULL; 700 dmp->dm_text_size = 0; 701 dmp->dm_data_va = NULL; 702 dmp->dm_data_size = 0; 703 dmp->dm_bss_va = NULL; 704 dmp->dm_bss_size = 0; 705 706 if (dmp->dm_extern != NULL) { 707 dt_idhash_destroy(dmp->dm_extern); 708 dmp->dm_extern = NULL; 709 } 710 711 (void) elf_end(dmp->dm_elf); 712 dmp->dm_elf = NULL; 713 714 dmp->dm_flags &= ~DT_DM_LOADED; 715 } 716 717 void 718 dt_module_destroy(dtrace_hdl_t *dtp, dt_module_t *dmp) 719 { 720 dt_list_delete(&dtp->dt_modlist, dmp); 721 assert(dtp->dt_nmods != 0); 722 dtp->dt_nmods--; 723 724 dt_module_unload(dtp, dmp); 725 free(dmp); 726 } 727 728 /* 729 * Insert a new external symbol reference into the specified module. The new 730 * symbol will be marked as undefined and is assigned a symbol index beyond 731 * any existing cached symbols from this module. We use the ident's di_data 732 * field to store a pointer to a copy of the dtrace_syminfo_t for this symbol. 733 */ 734 dt_ident_t * 735 dt_module_extern(dtrace_hdl_t *dtp, dt_module_t *dmp, 736 const char *name, const dtrace_typeinfo_t *tip) 737 { 738 dtrace_syminfo_t *sip; 739 dt_ident_t *idp; 740 uint_t id; 741 742 if (dmp->dm_extern == NULL && (dmp->dm_extern = dt_idhash_create( 743 "extern", NULL, dmp->dm_nsymelems, UINT_MAX)) == NULL) { 744 (void) dt_set_errno(dtp, EDT_NOMEM); 745 return (NULL); 746 } 747 748 if (dt_idhash_nextid(dmp->dm_extern, &id) == -1) { 749 (void) dt_set_errno(dtp, EDT_SYMOFLOW); 750 return (NULL); 751 } 752 753 if ((sip = malloc(sizeof (dtrace_syminfo_t))) == NULL) { 754 (void) dt_set_errno(dtp, EDT_NOMEM); 755 return (NULL); 756 } 757 758 idp = dt_idhash_insert(dmp->dm_extern, name, DT_IDENT_SYMBOL, 0, id, 759 _dtrace_symattr, 0, &dt_idops_thaw, NULL, dtp->dt_gen); 760 761 if (idp == NULL) { 762 (void) dt_set_errno(dtp, EDT_NOMEM); 763 free(sip); 764 return (NULL); 765 } 766 767 sip->dts_object = dmp->dm_name; 768 sip->dts_name = idp->di_name; 769 sip->dts_id = idp->di_id; 770 771 idp->di_data = sip; 772 idp->di_ctfp = tip->dtt_ctfp; 773 idp->di_type = tip->dtt_type; 774 775 return (idp); 776 } 777 778 const char * 779 dt_module_modelname(dt_module_t *dmp) 780 { 781 if (dmp->dm_ops == &dt_modops_64) 782 return ("64-bit"); 783 else 784 return ("32-bit"); 785 } 786 787 /* 788 * Update our module cache by adding an entry for the specified module 'name'. 789 * We create the dt_module_t and populate it using /system/object/<name>/. 790 */ 791 static void 792 dt_module_update(dtrace_hdl_t *dtp, const char *name) 793 { 794 char fname[MAXPATHLEN]; 795 struct stat64 st; 796 int fd, err, bits; 797 798 dt_module_t *dmp; 799 const char *s; 800 size_t shstrs; 801 GElf_Shdr sh; 802 Elf_Data *dp; 803 Elf_Scn *sp; 804 805 (void) snprintf(fname, sizeof (fname), 806 "%s/%s/object", OBJFS_ROOT, name); 807 808 if ((fd = open(fname, O_RDONLY)) == -1 || fstat64(fd, &st) == -1 || 809 (dmp = dt_module_create(dtp, name)) == NULL) { 810 dt_dprintf("failed to open %s: %s\n", fname, strerror(errno)); 811 (void) close(fd); 812 return; 813 } 814 815 /* 816 * Since the module can unload out from under us (and /system/object 817 * will return ENOENT), tell libelf to cook the entire file now and 818 * then close the underlying file descriptor immediately. If this 819 * succeeds, we know that we can continue safely using dmp->dm_elf. 820 */ 821 dmp->dm_elf = elf_begin(fd, ELF_C_READ, NULL); 822 err = elf_cntl(dmp->dm_elf, ELF_C_FDREAD); 823 (void) close(fd); 824 825 if (dmp->dm_elf == NULL || err == -1 || 826 elf_getshdrstrndx(dmp->dm_elf, &shstrs) == -1) { 827 dt_dprintf("failed to load %s: %s\n", 828 fname, elf_errmsg(elf_errno())); 829 dt_module_destroy(dtp, dmp); 830 return; 831 } 832 833 switch (gelf_getclass(dmp->dm_elf)) { 834 case ELFCLASS32: 835 dmp->dm_ops = &dt_modops_32; 836 bits = 32; 837 break; 838 case ELFCLASS64: 839 dmp->dm_ops = &dt_modops_64; 840 bits = 64; 841 break; 842 default: 843 dt_dprintf("failed to load %s: unknown ELF class\n", fname); 844 dt_module_destroy(dtp, dmp); 845 return; 846 } 847 848 /* 849 * Iterate over the section headers locating various sections of 850 * interest and use their attributes to flesh out the dt_module_t. 851 */ 852 for (sp = NULL; (sp = elf_nextscn(dmp->dm_elf, sp)) != NULL; ) { 853 if (gelf_getshdr(sp, &sh) == NULL || sh.sh_type == SHT_NULL || 854 (s = elf_strptr(dmp->dm_elf, shstrs, sh.sh_name)) == NULL) 855 continue; /* skip any malformed sections */ 856 857 if (strcmp(s, ".text") == 0) { 858 dmp->dm_text_size = sh.sh_size; 859 dmp->dm_text_va = sh.sh_addr; 860 } else if (strcmp(s, ".data") == 0) { 861 dmp->dm_data_size = sh.sh_size; 862 dmp->dm_data_va = sh.sh_addr; 863 } else if (strcmp(s, ".bss") == 0) { 864 dmp->dm_bss_size = sh.sh_size; 865 dmp->dm_bss_va = sh.sh_addr; 866 } else if (strcmp(s, ".info") == 0 && 867 (dp = elf_getdata(sp, NULL)) != NULL) { 868 bcopy(dp->d_buf, &dmp->dm_info, 869 MIN(sh.sh_size, sizeof (dmp->dm_info))); 870 } else if (strcmp(s, ".filename") == 0 && 871 (dp = elf_getdata(sp, NULL)) != NULL) { 872 (void) strlcpy(dmp->dm_file, 873 dp->d_buf, sizeof (dmp->dm_file)); 874 } 875 } 876 877 dmp->dm_flags |= DT_DM_KERNEL; 878 dmp->dm_modid = (int)OBJFS_MODID(st.st_ino); 879 880 if (dmp->dm_info.objfs_info_primary) 881 dmp->dm_flags |= DT_DM_PRIMARY; 882 883 dt_dprintf("opened %d-bit module %s (%s) [%d]\n", 884 bits, dmp->dm_name, dmp->dm_file, dmp->dm_modid); 885 } 886 887 /* 888 * Unload all the loaded modules and then refresh the module cache with the 889 * latest list of loaded modules and their address ranges. 890 */ 891 void 892 dtrace_update(dtrace_hdl_t *dtp) 893 { 894 dt_module_t *dmp; 895 DIR *dirp; 896 897 for (dmp = dt_list_next(&dtp->dt_modlist); 898 dmp != NULL; dmp = dt_list_next(dmp)) 899 dt_module_unload(dtp, dmp); 900 901 /* 902 * Open /system/object and attempt to create a libdtrace module for 903 * each kernel module that is loaded on the current system. 904 */ 905 if (!(dtp->dt_oflags & DTRACE_O_NOSYS) && 906 (dirp = opendir(OBJFS_ROOT)) != NULL) { 907 struct dirent *dp; 908 909 while ((dp = readdir(dirp)) != NULL) { 910 if (dp->d_name[0] != '.') 911 dt_module_update(dtp, dp->d_name); 912 } 913 914 (void) closedir(dirp); 915 } 916 917 /* 918 * Look up all the macro identifiers and set di_id to the latest value. 919 * This code collaborates with dt_lex.l on the use of di_id. We will 920 * need to implement something fancier if we need to support non-ints. 921 */ 922 dt_idhash_lookup(dtp->dt_macros, "egid")->di_id = getegid(); 923 dt_idhash_lookup(dtp->dt_macros, "euid")->di_id = geteuid(); 924 dt_idhash_lookup(dtp->dt_macros, "gid")->di_id = getgid(); 925 dt_idhash_lookup(dtp->dt_macros, "pid")->di_id = getpid(); 926 dt_idhash_lookup(dtp->dt_macros, "pgid")->di_id = getpgid(0); 927 dt_idhash_lookup(dtp->dt_macros, "ppid")->di_id = getppid(); 928 dt_idhash_lookup(dtp->dt_macros, "projid")->di_id = getprojid(); 929 dt_idhash_lookup(dtp->dt_macros, "sid")->di_id = getsid(0); 930 dt_idhash_lookup(dtp->dt_macros, "taskid")->di_id = gettaskid(); 931 dt_idhash_lookup(dtp->dt_macros, "uid")->di_id = getuid(); 932 933 /* 934 * Cache the pointers to the modules representing the base executable 935 * and the run-time linker in the dtrace client handle. Note that on 936 * x86 krtld is folded into unix, so if we don't find it, use unix 937 * instead. 938 */ 939 dtp->dt_exec = dt_module_lookup_by_name(dtp, "genunix"); 940 dtp->dt_rtld = dt_module_lookup_by_name(dtp, "krtld"); 941 if (dtp->dt_rtld == NULL) 942 dtp->dt_rtld = dt_module_lookup_by_name(dtp, "unix"); 943 944 /* 945 * If this is the first time we are initializing the module list, 946 * remove the module for genunix from the module list and then move it 947 * to the front of the module list. We do this so that type and symbol 948 * queries encounter genunix and thereby optimize for the common case 949 * in dtrace_lookup_by_name() and dtrace_lookup_by_type(), below. 950 */ 951 if (dtp->dt_exec != NULL && 952 dtp->dt_cdefs == NULL && dtp->dt_ddefs == NULL) { 953 dt_list_delete(&dtp->dt_modlist, dtp->dt_exec); 954 dt_list_prepend(&dtp->dt_modlist, dtp->dt_exec); 955 } 956 } 957 958 static dt_module_t * 959 dt_module_from_object(dtrace_hdl_t *dtp, const char *object) 960 { 961 int err = EDT_NOMOD; 962 dt_module_t *dmp; 963 964 switch ((uintptr_t)object) { 965 case (uintptr_t)DTRACE_OBJ_EXEC: 966 dmp = dtp->dt_exec; 967 break; 968 case (uintptr_t)DTRACE_OBJ_RTLD: 969 dmp = dtp->dt_rtld; 970 break; 971 case (uintptr_t)DTRACE_OBJ_CDEFS: 972 dmp = dtp->dt_cdefs; 973 break; 974 case (uintptr_t)DTRACE_OBJ_DDEFS: 975 dmp = dtp->dt_ddefs; 976 break; 977 default: 978 dmp = dt_module_create(dtp, object); 979 err = EDT_NOMEM; 980 } 981 982 if (dmp == NULL) 983 (void) dt_set_errno(dtp, err); 984 985 return (dmp); 986 } 987 988 /* 989 * Exported interface to look up a symbol by name. We return the GElf_Sym and 990 * complete symbol information for the matching symbol. 991 */ 992 int 993 dtrace_lookup_by_name(dtrace_hdl_t *dtp, const char *object, const char *name, 994 GElf_Sym *symp, dtrace_syminfo_t *sip) 995 { 996 dt_module_t *dmp; 997 dt_ident_t *idp; 998 uint_t n, id; 999 GElf_Sym sym; 1000 1001 uint_t mask = 0; /* mask of dt_module flags to match */ 1002 uint_t bits = 0; /* flag bits that must be present */ 1003 1004 if (object != DTRACE_OBJ_EVERY && 1005 object != DTRACE_OBJ_KMODS && 1006 object != DTRACE_OBJ_UMODS) { 1007 if ((dmp = dt_module_from_object(dtp, object)) == NULL) 1008 return (-1); /* dt_errno is set for us */ 1009 1010 if (dt_module_load(dtp, dmp) == -1) 1011 return (-1); /* dt_errno is set for us */ 1012 n = 1; 1013 1014 } else { 1015 if (object == DTRACE_OBJ_KMODS) 1016 mask = bits = DT_DM_KERNEL; 1017 else if (object == DTRACE_OBJ_UMODS) 1018 mask = DT_DM_KERNEL; 1019 1020 dmp = dt_list_next(&dtp->dt_modlist); 1021 n = dtp->dt_nmods; 1022 } 1023 1024 if (symp == NULL) 1025 symp = &sym; 1026 1027 for (; n > 0; n--, dmp = dt_list_next(dmp)) { 1028 if ((dmp->dm_flags & mask) != bits) 1029 continue; /* failed to match required attributes */ 1030 1031 if (dt_module_load(dtp, dmp) == -1) 1032 continue; /* failed to load symbol table */ 1033 1034 if (dmp->dm_ops->do_symname(dmp, name, symp, &id) != NULL) { 1035 if (sip != NULL) { 1036 sip->dts_object = dmp->dm_name; 1037 sip->dts_name = (const char *) 1038 dmp->dm_strtab.cts_data + symp->st_name; 1039 sip->dts_id = id; 1040 } 1041 return (0); 1042 } 1043 1044 if (dmp->dm_extern != NULL && 1045 (idp = dt_idhash_lookup(dmp->dm_extern, name)) != NULL) { 1046 if (symp != &sym) { 1047 symp->st_name = (uintptr_t)idp->di_name; 1048 symp->st_info = 1049 GELF_ST_INFO(STB_GLOBAL, STT_NOTYPE); 1050 symp->st_other = 0; 1051 symp->st_shndx = SHN_UNDEF; 1052 symp->st_value = 0; 1053 symp->st_size = 1054 ctf_type_size(idp->di_ctfp, idp->di_type); 1055 } 1056 1057 if (sip != NULL) { 1058 sip->dts_object = dmp->dm_name; 1059 sip->dts_name = idp->di_name; 1060 sip->dts_id = idp->di_id; 1061 } 1062 1063 return (0); 1064 } 1065 } 1066 1067 return (dt_set_errno(dtp, EDT_NOSYM)); 1068 } 1069 1070 /* 1071 * Exported interface to look up a symbol by address. We return the GElf_Sym 1072 * and complete symbol information for the matching symbol. 1073 */ 1074 int 1075 dtrace_lookup_by_addr(dtrace_hdl_t *dtp, GElf_Addr addr, 1076 GElf_Sym *symp, dtrace_syminfo_t *sip) 1077 { 1078 dt_module_t *dmp; 1079 uint_t id; 1080 const dtrace_vector_t *v = dtp->dt_vector; 1081 1082 if (v != NULL) 1083 return (v->dtv_lookup_by_addr(dtp->dt_varg, addr, symp, sip)); 1084 1085 for (dmp = dt_list_next(&dtp->dt_modlist); dmp != NULL; 1086 dmp = dt_list_next(dmp)) { 1087 if (addr - dmp->dm_text_va < dmp->dm_text_size || 1088 addr - dmp->dm_data_va < dmp->dm_data_size || 1089 addr - dmp->dm_bss_va < dmp->dm_bss_size) 1090 break; 1091 } 1092 1093 if (dmp == NULL) 1094 return (dt_set_errno(dtp, EDT_NOSYMADDR)); 1095 1096 if (dt_module_load(dtp, dmp) == -1) 1097 return (-1); /* dt_errno is set for us */ 1098 1099 if (symp != NULL) { 1100 if (dmp->dm_ops->do_symaddr(dmp, addr, symp, &id) == NULL) 1101 return (dt_set_errno(dtp, EDT_NOSYMADDR)); 1102 } 1103 1104 if (sip != NULL) { 1105 sip->dts_object = dmp->dm_name; 1106 1107 if (symp != NULL) { 1108 sip->dts_name = (const char *) 1109 dmp->dm_strtab.cts_data + symp->st_name; 1110 sip->dts_id = id; 1111 } else { 1112 sip->dts_name = NULL; 1113 sip->dts_id = 0; 1114 } 1115 } 1116 1117 return (0); 1118 } 1119 1120 int 1121 dtrace_lookup_by_type(dtrace_hdl_t *dtp, const char *object, const char *name, 1122 dtrace_typeinfo_t *tip) 1123 { 1124 dtrace_typeinfo_t ti; 1125 dt_module_t *dmp; 1126 int found = 0; 1127 ctf_id_t id; 1128 uint_t n; 1129 int justone; 1130 1131 uint_t mask = 0; /* mask of dt_module flags to match */ 1132 uint_t bits = 0; /* flag bits that must be present */ 1133 1134 if (object != DTRACE_OBJ_EVERY && 1135 object != DTRACE_OBJ_KMODS && 1136 object != DTRACE_OBJ_UMODS) { 1137 if ((dmp = dt_module_from_object(dtp, object)) == NULL) 1138 return (-1); /* dt_errno is set for us */ 1139 1140 if (dt_module_load(dtp, dmp) == -1) 1141 return (-1); /* dt_errno is set for us */ 1142 n = 1; 1143 justone = 1; 1144 1145 } else { 1146 if (object == DTRACE_OBJ_KMODS) 1147 mask = bits = DT_DM_KERNEL; 1148 else if (object == DTRACE_OBJ_UMODS) 1149 mask = DT_DM_KERNEL; 1150 1151 dmp = dt_list_next(&dtp->dt_modlist); 1152 n = dtp->dt_nmods; 1153 justone = 0; 1154 } 1155 1156 if (tip == NULL) 1157 tip = &ti; 1158 1159 for (; n > 0; n--, dmp = dt_list_next(dmp)) { 1160 if ((dmp->dm_flags & mask) != bits) 1161 continue; /* failed to match required attributes */ 1162 1163 /* 1164 * If we can't load the CTF container, continue on to the next 1165 * module. If our search was scoped to only one module then 1166 * return immediately leaving dt_errno unmodified. 1167 */ 1168 if (dt_module_getctf(dtp, dmp) == NULL) { 1169 if (justone) 1170 return (-1); 1171 continue; 1172 } 1173 1174 /* 1175 * Look up the type in the module's CTF container. If our 1176 * match is a forward declaration tag, save this choice in 1177 * 'tip' and keep going in the hope that we will locate the 1178 * underlying structure definition. Otherwise just return. 1179 */ 1180 if ((id = ctf_lookup_by_name(dmp->dm_ctfp, name)) != CTF_ERR) { 1181 tip->dtt_object = dmp->dm_name; 1182 tip->dtt_ctfp = dmp->dm_ctfp; 1183 tip->dtt_type = id; 1184 1185 if (ctf_type_kind(dmp->dm_ctfp, ctf_type_resolve( 1186 dmp->dm_ctfp, id)) != CTF_K_FORWARD) 1187 return (0); 1188 1189 found++; 1190 } 1191 } 1192 1193 if (found == 0) 1194 return (dt_set_errno(dtp, EDT_NOTYPE)); 1195 1196 return (0); 1197 } 1198 1199 int 1200 dtrace_symbol_type(dtrace_hdl_t *dtp, const GElf_Sym *symp, 1201 const dtrace_syminfo_t *sip, dtrace_typeinfo_t *tip) 1202 { 1203 dt_module_t *dmp; 1204 1205 tip->dtt_object = NULL; 1206 tip->dtt_ctfp = NULL; 1207 tip->dtt_type = CTF_ERR; 1208 1209 if ((dmp = dt_module_lookup_by_name(dtp, sip->dts_object)) == NULL) 1210 return (dt_set_errno(dtp, EDT_NOMOD)); 1211 1212 if (symp->st_shndx == SHN_UNDEF && dmp->dm_extern != NULL) { 1213 dt_ident_t *idp = 1214 dt_idhash_lookup(dmp->dm_extern, sip->dts_name); 1215 1216 if (idp == NULL) 1217 return (dt_set_errno(dtp, EDT_NOSYM)); 1218 1219 tip->dtt_ctfp = idp->di_ctfp; 1220 tip->dtt_type = idp->di_type; 1221 1222 } else if (GELF_ST_TYPE(symp->st_info) != STT_FUNC) { 1223 if (dt_module_getctf(dtp, dmp) == NULL) 1224 return (-1); /* errno is set for us */ 1225 1226 tip->dtt_ctfp = dmp->dm_ctfp; 1227 tip->dtt_type = ctf_lookup_by_symbol(dmp->dm_ctfp, sip->dts_id); 1228 1229 if (tip->dtt_type == CTF_ERR) { 1230 dtp->dt_ctferr = ctf_errno(tip->dtt_ctfp); 1231 return (dt_set_errno(dtp, EDT_CTF)); 1232 } 1233 1234 } else { 1235 tip->dtt_ctfp = DT_FPTR_CTFP(dtp); 1236 tip->dtt_type = DT_FPTR_TYPE(dtp); 1237 } 1238 1239 tip->dtt_object = dmp->dm_name; 1240 return (0); 1241 } 1242 1243 static dtrace_objinfo_t * 1244 dt_module_info(const dt_module_t *dmp, dtrace_objinfo_t *dto) 1245 { 1246 dto->dto_name = dmp->dm_name; 1247 dto->dto_file = dmp->dm_file; 1248 dto->dto_id = dmp->dm_modid; 1249 dto->dto_flags = 0; 1250 1251 if (dmp->dm_flags & DT_DM_KERNEL) 1252 dto->dto_flags |= DTRACE_OBJ_F_KERNEL; 1253 if (dmp->dm_flags & DT_DM_PRIMARY) 1254 dto->dto_flags |= DTRACE_OBJ_F_PRIMARY; 1255 1256 dto->dto_text_va = dmp->dm_text_va; 1257 dto->dto_text_size = dmp->dm_text_size; 1258 dto->dto_data_va = dmp->dm_data_va; 1259 dto->dto_data_size = dmp->dm_data_size; 1260 dto->dto_bss_va = dmp->dm_bss_va; 1261 dto->dto_bss_size = dmp->dm_bss_size; 1262 1263 return (dto); 1264 } 1265 1266 int 1267 dtrace_object_iter(dtrace_hdl_t *dtp, dtrace_obj_f *func, void *data) 1268 { 1269 const dt_module_t *dmp = dt_list_next(&dtp->dt_modlist); 1270 dtrace_objinfo_t dto; 1271 int rv; 1272 1273 for (; dmp != NULL; dmp = dt_list_next(dmp)) { 1274 if ((rv = (*func)(dtp, dt_module_info(dmp, &dto), data)) != 0) 1275 return (rv); 1276 } 1277 1278 return (0); 1279 } 1280 1281 int 1282 dtrace_object_info(dtrace_hdl_t *dtp, const char *object, dtrace_objinfo_t *dto) 1283 { 1284 dt_module_t *dmp; 1285 1286 if (object == DTRACE_OBJ_EVERY || object == DTRACE_OBJ_KMODS || 1287 object == DTRACE_OBJ_UMODS || dto == NULL) 1288 return (dt_set_errno(dtp, EINVAL)); 1289 1290 if ((dmp = dt_module_from_object(dtp, object)) == NULL) 1291 return (-1); /* dt_errno is set for us */ 1292 1293 if (dt_module_load(dtp, dmp) == -1) 1294 return (-1); /* dt_errno is set for us */ 1295 1296 (void) dt_module_info(dmp, dto); 1297 return (0); 1298 } 1299
Indexes created Fri Nov 27 08:09:20 UTC 2009
Terms of Use |
Privacy |
Trademarks |
Copyright Policy |
Site Guidelines |
Help
Your use of this web site or any of its content or software indicates your agreement to be bound by these Terms of Use.
Copyright © 1995-2008 Sun Microsystems, Inc.