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 /* 23 * Copyright 2009 Sun Microsystems, Inc. All rights reserved. 24 * Use is subject to license terms. 25 */ 26 27 /* 28 * SPARC V9 machine dependent and ELF file class dependent functions. 29 * Contains routines for performing function binding and symbol relocations. 30 */ 31 32 #include <stdio.h> 33 #include <sys/elf.h> 34 #include <sys/elf_SPARC.h> 35 #include <sys/mman.h> 36 #include <dlfcn.h> 37 #include <synch.h> 38 #include <string.h> 39 #include <debug.h> 40 #include <reloc.h> 41 #include <conv.h> 42 #include "_rtld.h" 43 #include "_audit.h" 44 #include "_elf.h" 45 #include "_inline.h" 46 #include "msg.h" 47 48 extern void iflush_range(caddr_t, size_t); 49 extern void plt_upper_32(uintptr_t, uintptr_t); 50 extern void plt_upper_44(uintptr_t, uintptr_t); 51 extern void plt_full_range(uintptr_t, uintptr_t); 52 extern void elf_rtbndr(Rt_map *, ulong_t, caddr_t); 53 extern void elf_rtbndr_far(Rt_map *, ulong_t, caddr_t); 54 55 int 56 elf_mach_flags_check(Rej_desc *rej, Ehdr *ehdr) 57 { 58 /* 59 * Check machine type and flags. 60 */ 61 if (ehdr->e_flags & EF_SPARC_EXT_MASK) { 62 /* 63 * Check vendor-specific extensions. 64 */ 65 if (ehdr->e_flags & EF_SPARC_HAL_R1) { 66 rej->rej_type = SGS_REJ_HAL; 67 rej->rej_info = (uint_t)ehdr->e_flags; 68 return (0); 69 } 70 if ((ehdr->e_flags & EF_SPARC_SUN_US3) & ~at_flags) { 71 rej->rej_type = SGS_REJ_US3; 72 rej->rej_info = (uint_t)ehdr->e_flags; 73 return (0); 74 } 75 76 /* 77 * Generic check. 78 * All of our 64-bit SPARC's support the US1 (UltraSPARC 1) 79 * instructions so that bit isn't worth checking for explicitly. 80 */ 81 if ((ehdr->e_flags & EF_SPARC_EXT_MASK) & ~at_flags) { 82 rej->rej_type = SGS_REJ_BADFLAG; 83 rej->rej_info = (uint_t)ehdr->e_flags; 84 return (0); 85 } 86 } else if ((ehdr->e_flags & ~EF_SPARCV9_MM) != 0) { 87 rej->rej_type = SGS_REJ_BADFLAG; 88 rej->rej_info = (uint_t)ehdr->e_flags; 89 return (0); 90 } 91 return (1); 92 } 93 94 95 void 96 ldso_plt_init(Rt_map *lmp) 97 { 98 /* 99 * There is no need to analyze ld.so because we don't map in any of 100 * its dependencies. However we may map these dependencies in later 101 * (as if ld.so had dlopened them), so initialize the plt and the 102 * permission information. 103 */ 104 if (PLTGOT(lmp)) { 105 Xword pltoff; 106 107 /* 108 * Install the lm pointer in .PLT2 as per the ABI. 109 */ 110 pltoff = (2 * M_PLT_ENTSIZE) / M_PLT_INSSIZE; 111 elf_plt2_init(PLTGOT(lmp) + pltoff, lmp); 112 113 /* 114 * The V9 ABI states that the first 32k PLT entries 115 * use .PLT1, with .PLT0 used by the "latter" entries. 116 * We don't currently implement the extendend format, 117 * so install an error handler in .PLT0 to catch anyone 118 * trying to use it. 119 */ 120 elf_plt_init(PLTGOT(lmp), (caddr_t)elf_rtbndr_far); 121 122 /* 123 * Initialize .PLT1 124 */ 125 pltoff = M_PLT_ENTSIZE / M_PLT_INSSIZE; 126 elf_plt_init(PLTGOT(lmp) + pltoff, (caddr_t)elf_rtbndr); 127 } 128 } 129 130 /* 131 * elf_plt_write() will test to see how far away our destination 132 * address lies. If it is close enough that a branch can 133 * be used instead of a jmpl - we will fill the plt in with 134 * single branch. The branches are much quicker then 135 * a jmpl instruction - see bug#4356879 for further 136 * details. 137 * 138 * NOTE: we pass in both a 'pltaddr' and a 'vpltaddr' since 139 * librtld/dldump update PLT's who's physical 140 * address is not the same as the 'virtual' runtime 141 * address. 142 */ 143 Pltbindtype 144 elf_plt_write(uintptr_t addr, uintptr_t vaddr, void *rptr, uintptr_t symval, 145 Xword pltndx) 146 { 147 Rela *rel = (Rela *)rptr; 148 uintptr_t nsym = ~symval; 149 uintptr_t vpltaddr, pltaddr; 150 long disp; 151 152 153 pltaddr = addr + rel->r_offset; 154 vpltaddr = vaddr + rel->r_offset; 155 disp = symval - vpltaddr - 4; 156 157 if (pltndx >= (M64_PLT_NEARPLTS - M_PLT_XNumber)) { 158 *((Sxword *)pltaddr) = (uintptr_t)symval + 159 (uintptr_t)rel->r_addend - vaddr; 160 DBG_CALL(pltcntfar++); 161 return (PLT_T_FAR); 162 } 163 164 /* 165 * Test if the destination address is close enough to use 166 * a ba,a... instruction to reach it. 167 */ 168 if (S_INRANGE(disp, 23) && !(rtld_flags & RT_FL_NOBAPLT)) { 169 uint_t *pltent, bainstr; 170 Pltbindtype rc; 171 172 pltent = (uint_t *)pltaddr; 173 174 /* 175 * The 176 * 177 * ba,a,pt %icc, <dest> 178 * 179 * is the most efficient of the PLT's. If we 180 * are within +-20 bits - use that branch. 181 */ 182 if (S_INRANGE(disp, 20)) { 183 bainstr = M_BA_A_PT; /* ba,a,pt %icc,<dest> */ 184 /* LINTED */ 185 bainstr |= (uint_t)(S_MASK(19) & (disp >> 2)); 186 rc = PLT_T_21D; 187 DBG_CALL(pltcnt21d++); 188 } else { 189 /* 190 * Otherwise - we fall back to the good old 191 * 192 * ba,a <dest> 193 * 194 * Which still beats a jmpl instruction. 195 */ 196 bainstr = M_BA_A; /* ba,a <dest> */ 197 /* LINTED */ 198 bainstr |= (uint_t)(S_MASK(22) & (disp >> 2)); 199 rc = PLT_T_24D; 200 DBG_CALL(pltcnt24d++); 201 } 202 203 pltent[2] = M_NOP; /* nop instr */ 204 pltent[1] = bainstr; 205 206 iflush_range((char *)(&pltent[1]), 4); 207 pltent[0] = M_NOP; /* nop instr */ 208 iflush_range((char *)(&pltent[0]), 4); 209 return (rc); 210 } 211 212 if ((nsym >> 32) == 0) { 213 plt_upper_32(pltaddr, symval); 214 DBG_CALL(pltcntu32++); 215 return (PLT_T_U32); 216 } 217 218 if ((nsym >> 44) == 0) { 219 plt_upper_44(pltaddr, symval); 220 DBG_CALL(pltcntu44++); 221 return (PLT_T_U44); 222 } 223 224 /* 225 * The PLT destination is not in reach of 226 * a branch instruction - so we fall back 227 * to a 'jmpl' sequence. 228 */ 229 plt_full_range(pltaddr, symval); 230 DBG_CALL(pltcntfull++); 231 return (PLT_T_FULL); 232 } 233 234 /* 235 * Once relocated, the following 6 instruction sequence moves 236 * a 64-bit immediate value into register %g1 237 */ 238 #define VAL64_TO_G1 \ 239 /* 0x00 */ 0x0b, 0x00, 0x00, 0x00, /* sethi %hh(value), %g5 */ \ 240 /* 0x04 */ 0x8a, 0x11, 0x60, 0x00, /* or %g5, %hm(value), %g5 */ \ 241 /* 0x08 */ 0x8b, 0x29, 0x70, 0x20, /* sllx %g5, 32, %g5 */ \ 242 /* 0x0c */ 0x03, 0x00, 0x00, 0x00, /* sethi %lm(value), %g1 */ \ 243 /* 0x10 */ 0x82, 0x10, 0x60, 0x00, /* or %g1, %lo(value), %g1 */ \ 244 /* 0x14 */ 0x82, 0x10, 0x40, 0x05 /* or %g1, %g5, %g1 */ 245 246 /* 247 * Local storage space created on the stack created for this glue 248 * code includes space for: 249 * 0x8 pointer to dyn_data 250 * 0x8 size prev stack frame 251 */ 252 static const Byte dyn_plt_template[] = { 253 /* 0x0 */ 0x2a, 0xcf, 0x80, 0x03, /* brnz,a,pt %fp, 0xc */ 254 /* 0x4 */ 0x82, 0x27, 0x80, 0x0e, /* sub %fp, %sp, %g1 */ 255 /* 0x8 */ 0x82, 0x10, 0x20, 0xb0, /* mov 176, %g1 */ 256 /* 0xc */ 0x9d, 0xe3, 0xbf, 0x40, /* save %sp, -192, %sp */ 257 /* 0x10 */ 0xc2, 0x77, 0xa7, 0xef, /* stx %g1, [%fp + 2031] */ 258 259 /* store prev stack size */ 260 /* 0x14 */ VAL64_TO_G1, /* dyn_data to g1 */ 261 /* 0x2c */ 0xc2, 0x77, 0xa7, 0xf7, /* stx %g1, [%fp + 2039] */ 262 263 /* 0x30 */ VAL64_TO_G1, /* elf_plt_trace() addr to g1 */ 264 265 /* Call to elf_plt_trace() via g1 */ 266 /* 0x48 */ 0x9f, 0xc0, 0x60, 0x00, /* jmpl ! link r[15] to addr in g1 */ 267 /* 0x4c */ 0x01, 0x00, 0x00, 0x00 /* nop ! for jmpl delay slot *AND* */ 268 /* to get 8-byte alignment */ 269 }; 270 271 int dyn_plt_ent_size = sizeof (dyn_plt_template) + 272 sizeof (Addr) + /* reflmp */ 273 sizeof (Addr) + /* deflmp */ 274 sizeof (Word) + /* symndx */ 275 sizeof (Word) + /* sb_flags */ 276 sizeof (Sym); /* symdef */ 277 278 /* 279 * the dynamic plt entry is: 280 * 281 * brnz,a,pt %fp, 1f 282 * sub %sp, %fp, %g1 283 * mov SA(MINFRAME), %g1 284 * 1: 285 * save %sp, -(SA(MINFRAME) + (2 * CLONGSIZE)), %sp 286 * 287 * ! store prev stack size 288 * stx %g1, [%fp + STACK_BIAS - (2 * CLONGSIZE)] 289 * 290 * 2: 291 * ! move dyn_data to %g1 292 * sethi %hh(dyn_data), %g5 293 * or %g5, %hm(dyn_data), %g5 294 * sllx %g5, 32, %g5 295 * sethi %lm(dyn_data), %g1 296 * or %g1, %lo(dyn_data), %g1 297 * or %g1, %g5, %g1 298 * 299 * ! store dyn_data ptr on frame (from %g1) 300 * stx %g1, [%fp + STACK_BIAS - CLONGSIZE] 301 * 302 * ! Move address of elf_plt_trace() into %g1 303 * [Uses same 6 instructions as shown at label 2: above. Not shown.] 304 * 305 * ! Use JMPL to make call. CALL instruction is limited to 30-bits. 306 * ! of displacement. 307 * jmp1 %g1, %o7 308 * 309 * ! JMPL has a delay slot that must be filled. And, the sequence 310 * ! of instructions needs to have 8-byte alignment. This NOP does both. 311 * ! The alignment is needed for the data we put following the 312 * ! instruction. 313 * nop 314 * 315 * dyn data: 316 * Addr reflmp 317 * Addr deflmp 318 * Word symndx 319 * Word sb_flags 320 * Sym symdef (Elf64_Sym = 24-bytes) 321 */ 322 323 /* 324 * Relocate the instructions given by the VAL64_TO_G1 macro above. 325 * The arguments parallel those of do_reloc_rtld(). 326 * 327 * entry: 328 * off - Address of 1st instruction in sequence. 329 * value - Value being relocated (addend) 330 * sym - Name of value being relocated. 331 * lml - link map list 332 * 333 * exit: 334 * Returns TRUE for success, FALSE for failure. 335 */ 336 static int 337 reloc_val64_to_g1(uchar_t *off, Addr *value, const char *sym, Lm_list *lml) 338 { 339 Xword tmp_value; 340 341 /* 342 * relocating: 343 * sethi %hh(value), %g5 344 */ 345 tmp_value = (Xword)value; 346 if (do_reloc_rtld(R_SPARC_HH22, off, &tmp_value, sym, 347 MSG_ORIG(MSG_SPECFIL_DYNPLT), lml) == 0) { 348 return (0); 349 } 350 351 /* 352 * relocating: 353 * or %g5, %hm(value), %g5 354 */ 355 tmp_value = (Xword)value; 356 if (do_reloc_rtld(R_SPARC_HM10, off + 4, &tmp_value, sym, 357 MSG_ORIG(MSG_SPECFIL_DYNPLT), lml) == 0) { 358 return (0); 359 } 360 361 /* 362 * relocating: 363 * sethi %lm(value), %g1 364 */ 365 tmp_value = (Xword)value; 366 if (do_reloc_rtld(R_SPARC_LM22, off + 12, &tmp_value, sym, 367 MSG_ORIG(MSG_SPECFIL_DYNPLT), lml) == 0) { 368 return (0); 369 } 370 371 /* 372 * relocating: 373 * or %g1, %lo(value), %g1 374 */ 375 tmp_value = (Xword)value; 376 if (do_reloc_rtld(R_SPARC_LO10, off + 16, &tmp_value, sym, 377 MSG_ORIG(MSG_SPECFIL_DYNPLT), lml) == 0) { 378 return (0); 379 } 380 381 return (1); 382 } 383 384 static caddr_t 385 elf_plt_trace_write(caddr_t addr, Rela *rptr, Rt_map *rlmp, Rt_map *dlmp, 386 Sym *sym, uint_t symndx, ulong_t pltndx, caddr_t to, uint_t sb_flags, 387 int *fail) 388 { 389 extern ulong_t elf_plt_trace(); 390 uchar_t *dyn_plt; 391 uintptr_t *dyndata; 392 393 /* 394 * If both pltenter & pltexit have been disabled there 395 * there is no reason to even create the glue code. 396 */ 397 if ((sb_flags & (LA_SYMB_NOPLTENTER | LA_SYMB_NOPLTEXIT)) == 398 (LA_SYMB_NOPLTENTER | LA_SYMB_NOPLTEXIT)) { 399 (void) elf_plt_write((uintptr_t)addr, (uintptr_t)addr, 400 rptr, (uintptr_t)to, pltndx); 401 return (to); 402 } 403 404 /* 405 * We only need to add the glue code if there is an auditing 406 * library that is interested in this binding. 407 */ 408 dyn_plt = (uchar_t *)((uintptr_t)AUDINFO(rlmp)->ai_dynplts + 409 (pltndx * dyn_plt_ent_size)); 410 411 /* 412 * Have we initialized this dynamic plt entry yet? If we haven't do it 413 * now. Otherwise this function has been called before, but from a 414 * different plt (ie. from another shared object). In that case 415 * we just set the plt to point to the new dyn_plt. 416 */ 417 if (*dyn_plt == 0) { 418 Sym *symp; 419 Lm_list *lml = LIST(rlmp); 420 421 (void) memcpy((void *)dyn_plt, dyn_plt_template, 422 sizeof (dyn_plt_template)); 423 dyndata = (uintptr_t *)((uintptr_t)dyn_plt + 424 sizeof (dyn_plt_template)); 425 426 /* 427 * relocating: 428 * VAL64_TO_G1(dyndata) 429 * VAL64_TO_G1(&elf_plt_trace) 430 */ 431 if (!(reloc_val64_to_g1((dyn_plt + 0x14), dyndata, 432 MSG_ORIG(MSG_SYM_LADYNDATA), lml) && 433 reloc_val64_to_g1((dyn_plt + 0x30), (Addr *)&elf_plt_trace, 434 MSG_ORIG(MSG_SYM_ELFPLTTRACE), lml))) { 435 *fail = 1; 436 return (0); 437 } 438 439 *dyndata++ = (Addr)rlmp; 440 *dyndata++ = (Addr)dlmp; 441 442 /* 443 * symndx in the high word, sb_flags in the low. 444 */ 445 *dyndata = (Addr)sb_flags; 446 *(Word *)dyndata = symndx; 447 dyndata++; 448 449 symp = (Sym *)dyndata; 450 *symp = *sym; 451 symp->st_value = (Addr)to; 452 iflush_range((void *)dyn_plt, sizeof (dyn_plt_template)); 453 } 454 455 (void) elf_plt_write((uintptr_t)addr, (uintptr_t)addr, rptr, 456 (uintptr_t)dyn_plt, pltndx); 457 return ((caddr_t)dyn_plt); 458 } 459 460 /* 461 * Function binding routine - invoked on the first call to a function through 462 * the procedure linkage table; 463 * passes first through an assembly language interface. 464 * 465 * Takes the address of the PLT entry where the call originated, 466 * the offset into the relocation table of the associated 467 * relocation entry and the address of the link map (rt_private_map struct) 468 * for the entry. 469 * 470 * Returns the address of the function referenced after re-writing the PLT 471 * entry to invoke the function directly. 472 * 473 * On error, causes process to terminate with a signal. 474 */ 475 ulong_t 476 elf_bndr(Rt_map *lmp, ulong_t pltoff, caddr_t from) 477 { 478 Rt_map *nlmp, *llmp; 479 Addr addr, vaddr, reloff, symval; 480 char *name; 481 Rela *rptr; 482 Sym *rsym, *nsym; 483 Xword pltndx; 484 uint_t binfo, sb_flags = 0, dbg_class; 485 ulong_t rsymndx; 486 Slookup sl; 487 Pltbindtype pbtype; 488 int entry, lmflags, farplt = 0; 489 Lm_list *lml; 490 491 /* 492 * For compatibility with libthread (TI_VERSION 1) we track the entry 493 * value. A zero value indicates we have recursed into ld.so.1 to 494 * further process a locking request. Under this recursion we disable 495 * tsort and cleanup activities. 496 */ 497 entry = enter(0); 498 499 lml = LIST(lmp); 500 if ((lmflags = lml->lm_flags) & LML_FLG_RTLDLM) { 501 dbg_class = dbg_desc->d_class; 502 dbg_desc->d_class = 0; 503 } 504 505 /* 506 * Must calculate true plt relocation address from reloc. 507 * Take offset, subtract number of reserved PLT entries, and divide 508 * by PLT entry size, which should give the index of the plt 509 * entry (and relocation entry since they have been defined to be 510 * in the same order). Then we must multiply by the size of 511 * a relocation entry, which will give us the offset of the 512 * plt relocation entry from the start of them given by JMPREL(lm). 513 */ 514 addr = pltoff - M_PLT_RESERVSZ; 515 516 if (pltoff < (M64_PLT_NEARPLTS * M_PLT_ENTSIZE)) { 517 pltndx = addr / M_PLT_ENTSIZE; 518 } else { 519 ulong_t pltblockoff; 520 521 pltblockoff = pltoff - (M64_PLT_NEARPLTS * M_PLT_ENTSIZE); 522 pltndx = M64_PLT_NEARPLTS + 523 ((pltblockoff / M64_PLT_FBLOCKSZ) * M64_PLT_FBLKCNTS) + 524 ((pltblockoff % M64_PLT_FBLOCKSZ) / M64_PLT_FENTSIZE) - 525 M_PLT_XNumber; 526 farplt = 1; 527 } 528 529 /* 530 * Perform some basic sanity checks. If we didn't get a load map 531 * or the plt offset is invalid then its possible someone has walked 532 * over the plt entries or jumped to plt[01] out of the blue. 533 */ 534 if (!lmp || (!farplt && (addr % M_PLT_ENTSIZE) != 0) || 535 (farplt && (addr % M_PLT_INSSIZE))) { 536 Conv_inv_buf_t inv_buf; 537 538 eprintf(lml, ERR_FATAL, MSG_INTL(MSG_REL_PLTREF), 539 conv_reloc_SPARC_type(R_SPARC_JMP_SLOT, 0, &inv_buf), 540 EC_NATPTR(lmp), EC_XWORD(pltoff), EC_NATPTR(from)); 541 rtldexit(lml, 1); 542 } 543 reloff = pltndx * sizeof (Rela); 544 545 /* 546 * Use relocation entry to get symbol table entry and symbol name. 547 */ 548 addr = (ulong_t)JMPREL(lmp); 549 rptr = (Rela *)(addr + reloff); 550 rsymndx = ELF_R_SYM(rptr->r_info); 551 rsym = (Sym *)((ulong_t)SYMTAB(lmp) + (rsymndx * SYMENT(lmp))); 552 name = (char *)(STRTAB(lmp) + rsym->st_name); 553 554 /* 555 * Determine the last link-map of this list, this'll be the starting 556 * point for any tsort() processing. 557 */ 558 llmp = lml->lm_tail; 559 560 /* 561 * Find definition for symbol. Initialize the symbol lookup data 562 * structure. 563 */ 564 SLOOKUP_INIT(sl, name, lmp, lml->lm_head, ld_entry_cnt, 0, 565 rsymndx, rsym, 0, LKUP_DEFT); 566 567 if ((nsym = lookup_sym(&sl, &nlmp, &binfo, NULL)) == 0) { 568 eprintf(lml, ERR_FATAL, MSG_INTL(MSG_REL_NOSYM), NAME(lmp), 569 demangle(name)); 570 rtldexit(lml, 1); 571 } 572 573 symval = nsym->st_value; 574 if (!(FLAGS(nlmp) & FLG_RT_FIXED) && 575 (nsym->st_shndx != SHN_ABS)) 576 symval += ADDR(nlmp); 577 if ((lmp != nlmp) && ((FLAGS1(nlmp) & FL1_RT_NOINIFIN) == 0)) { 578 /* 579 * Record that this new link map is now bound to the caller. 580 */ 581 if (bind_one(lmp, nlmp, BND_REFER) == 0) 582 rtldexit(lml, 1); 583 } 584 585 if ((lml->lm_tflags | AFLAGS(lmp)) & LML_TFLG_AUD_SYMBIND) { 586 /* LINTED */ 587 uint_t symndx = (uint_t)(((uintptr_t)nsym - 588 (uintptr_t)SYMTAB(nlmp)) / SYMENT(nlmp)); 589 590 symval = audit_symbind(lmp, nlmp, nsym, symndx, symval, 591 &sb_flags); 592 } 593 594 if (FLAGS(lmp) & FLG_RT_FIXED) 595 vaddr = 0; 596 else 597 vaddr = ADDR(lmp); 598 599 pbtype = PLT_T_NONE; 600 if (!(rtld_flags & RT_FL_NOBIND)) { 601 if (((lml->lm_tflags | AFLAGS(lmp)) & 602 (LML_TFLG_AUD_PLTENTER | LML_TFLG_AUD_PLTEXIT)) && 603 AUDINFO(lmp)->ai_dynplts) { 604 int fail = 0; 605 /* LINTED */ 606 uint_t symndx = (uint_t)(((uintptr_t)nsym - 607 (uintptr_t)SYMTAB(nlmp)) / SYMENT(nlmp)); 608 609 symval = (ulong_t)elf_plt_trace_write((caddr_t)vaddr, 610 rptr, lmp, nlmp, nsym, symndx, pltndx, 611 (caddr_t)symval, sb_flags, &fail); 612 if (fail) 613 rtldexit(lml, 1); 614 } else { 615 /* 616 * Write standard PLT entry to jump directly 617 * to newly bound function. 618 */ 619 pbtype = elf_plt_write((uintptr_t)vaddr, 620 (uintptr_t)vaddr, rptr, symval, pltndx); 621 } 622 } 623 624 /* 625 * Print binding information and rebuild PLT entry. 626 */ 627 DBG_CALL(Dbg_bind_global(lmp, (Addr)from, (Off)(from - ADDR(lmp)), 628 (Xword)pltndx, pbtype, nlmp, (Addr)symval, nsym->st_value, 629 name, binfo)); 630 631 /* 632 * Complete any processing for newly loaded objects. Note we don't 633 * know exactly where any new objects are loaded (we know the object 634 * that supplied the symbol, but others may have been loaded lazily as 635 * we searched for the symbol), so sorting starts from the last 636 * link-map know on entry to this routine. 637 */ 638 if (entry) 639 load_completion(llmp); 640 641 /* 642 * Some operations like dldump() or dlopen()'ing a relocatable object 643 * result in objects being loaded on rtld's link-map, make sure these 644 * objects are initialized also. 645 */ 646 if ((LIST(nlmp)->lm_flags & LML_FLG_RTLDLM) && LIST(nlmp)->lm_init) 647 load_completion(nlmp); 648 649 /* 650 * Make sure the object to which we've bound has had it's .init fired. 651 * Cleanup before return to user code. 652 */ 653 if (entry) { 654 is_dep_init(nlmp, lmp); 655 leave(lml, 0); 656 } 657 658 if (lmflags & LML_FLG_RTLDLM) 659 dbg_desc->d_class = dbg_class; 660 661 return (symval); 662 } 663 664 static int 665 bindpltpad(Rt_map *lmp, Alist **padlist, Addr value, void **pltaddr, 666 const char *fname, const char *sname) 667 { 668 Aliste idx = 0; 669 Pltpadinfo ppi, *ppip; 670 void *plt; 671 uintptr_t pltoff; 672 Rela rel; 673 int i; 674 675 for (ALIST_TRAVERSE(*padlist, idx, ppip)) { 676 if (ppip->pp_addr == value) { 677 *pltaddr = ppip->pp_plt; 678 DBG_CALL(Dbg_bind_pltpad_from(lmp, (Addr)*pltaddr, 679 sname)); 680 return (1); 681 } 682 if (ppip->pp_addr > value) 683 break; 684 } 685 686 plt = PLTPAD(lmp); 687 pltoff = (uintptr_t)plt - (uintptr_t)ADDR(lmp); 688 689 PLTPAD(lmp) = (void *)((uintptr_t)PLTPAD(lmp) + M_PLT_ENTSIZE); 690 691 if (PLTPAD(lmp) > PLTPADEND(lmp)) { 692 /* 693 * Just fail in usual relocation way 694 */ 695 *pltaddr = (void *)value; 696 return (1); 697 } 698 rel.r_offset = pltoff; 699 rel.r_info = 0; 700 rel.r_addend = 0; 701 702 /* 703 * elf_plt_write assumes the plt was previously filled 704 * with NOP's, so fill it in now. 705 */ 706 for (i = 0; i < (M_PLT_ENTSIZE / sizeof (uint_t)); i++) { 707 ((uint_t *)plt)[i] = M_NOP; 708 } 709 iflush_range((caddr_t)plt, M_PLT_ENTSIZE); 710 711 (void) elf_plt_write(ADDR(lmp), ADDR(lmp), &rel, value, 0); 712 713 ppi.pp_addr = value; 714 ppi.pp_plt = plt; 715 716 if (alist_insert(padlist, &ppi, sizeof (Pltpadinfo), 717 AL_CNT_PLTPAD, idx) == NULL) 718 return (0); 719 720 *pltaddr = plt; 721 DBG_CALL(Dbg_bind_pltpad_to(lmp, (Addr)*pltaddr, fname, sname)); 722 return (1); 723 } 724 725 /* 726 * Read and process the relocations for one link object, we assume all 727 * relocation sections for loadable segments are stored contiguously in 728 * the file. 729 */ 730 int 731 elf_reloc(Rt_map *lmp, uint_t plt, int *in_nfavl, APlist **textrel) 732 { 733 ulong_t relbgn, relend, relsiz, basebgn, pltbgn, pltend; 734 ulong_t pltndx, roffset, rsymndx, psymndx = 0; 735 uint_t dsymndx, binfo, pbinfo; 736 Byte rtype; 737 long reladd; 738 Addr value, pvalue; 739 Sym *symref, *psymref, *symdef, *psymdef; 740 char *name, *pname; 741 Rt_map *_lmp, *plmp; 742 int ret = 1, noplt = 0; 743 long relacount = RELACOUNT(lmp); 744 Rela *rel; 745 Pltbindtype pbtype; 746 Alist *pltpadlist = NULL; 747 APlist *bound = NULL; 748 749 /* 750 * If an object has any DT_REGISTER entries associated with 751 * it, they are processed now. 752 */ 753 if ((plt == 0) && (FLAGS(lmp) & FLG_RT_REGSYMS)) { 754 if (elf_regsyms(lmp) == 0) 755 return (0); 756 } 757 758 /* 759 * Although only necessary for lazy binding, initialize the first 760 * procedure linkage table entry to go to elf_rtbndr(). dbx(1) seems 761 * to find this useful. 762 */ 763 if ((plt == 0) && PLTGOT(lmp)) { 764 mmapobj_result_t *mpp; 765 Xword pltoff; 766 767 /* 768 * Make sure the segment is writable. 769 */ 770 if ((((mpp = 771 find_segment((caddr_t)PLTGOT(lmp), lmp)) != NULL) && 772 ((mpp->mr_prot & PROT_WRITE) == 0)) && 773 ((set_prot(lmp, mpp, 1) == 0) || 774 (aplist_append(textrel, mpp, AL_CNT_TEXTREL) == NULL))) 775 return (0); 776 777 /* 778 * Install the lm pointer in .PLT2 as per the ABI. 779 */ 780 pltoff = (2 * M_PLT_ENTSIZE) / M_PLT_INSSIZE; 781 elf_plt2_init(PLTGOT(lmp) + pltoff, lmp); 782 783 /* 784 * The V9 ABI states that the first 32k PLT entries 785 * use .PLT1, with .PLT0 used by the "latter" entries. 786 * We don't currently implement the extendend format, 787 * so install an error handler in .PLT0 to catch anyone 788 * trying to use it. 789 */ 790 elf_plt_init(PLTGOT(lmp), (caddr_t)elf_rtbndr_far); 791 792 /* 793 * Initialize .PLT1 794 */ 795 pltoff = M_PLT_ENTSIZE / M_PLT_INSSIZE; 796 elf_plt_init(PLTGOT(lmp) + pltoff, (caddr_t)elf_rtbndr); 797 } 798 799 /* 800 * Initialize the plt start and end addresses. 801 */ 802 if ((pltbgn = (ulong_t)JMPREL(lmp)) != 0) 803 pltend = pltbgn + (ulong_t)(PLTRELSZ(lmp)); 804 805 /* 806 * If we've been called upon to promote an RTLD_LAZY object to an 807 * RTLD_NOW then we're only interested in scaning the .plt table. 808 */ 809 if (plt) { 810 relbgn = pltbgn; 811 relend = pltend; 812 } else { 813 /* 814 * The relocation sections appear to the run-time linker as a 815 * single table. Determine the address of the beginning and end 816 * of this table. There are two different interpretations of 817 * the ABI at this point: 818 * 819 * o The REL table and its associated RELSZ indicate the 820 * concatenation of *all* relocation sections (this is the 821 * model our link-editor constructs). 822 * 823 * o The REL table and its associated RELSZ indicate the 824 * concatenation of all *but* the .plt relocations. These 825 * relocations are specified individually by the JMPREL and 826 * PLTRELSZ entries. 827 * 828 * Determine from our knowledege of the relocation range and 829 * .plt range, the range of the total relocation table. Note 830 * that one other ABI assumption seems to be that the .plt 831 * relocations always follow any other relocations, the 832 * following range checking drops that assumption. 833 */ 834 relbgn = (ulong_t)(REL(lmp)); 835 relend = relbgn + (ulong_t)(RELSZ(lmp)); 836 if (pltbgn) { 837 if (!relbgn || (relbgn > pltbgn)) 838 relbgn = pltbgn; 839 if (!relbgn || (relend < pltend)) 840 relend = pltend; 841 } 842 } 843 if (!relbgn || (relbgn == relend)) { 844 DBG_CALL(Dbg_reloc_run(lmp, 0, plt, DBG_REL_NONE)); 845 return (1); 846 } 847 848 relsiz = (ulong_t)(RELENT(lmp)); 849 basebgn = ADDR(lmp); 850 851 DBG_CALL(Dbg_reloc_run(lmp, M_REL_SHT_TYPE, plt, DBG_REL_START)); 852 853 /* 854 * If we're processing in lazy mode there is no need to scan the 855 * .rela.plt table. 856 */ 857 if (pltbgn && ((MODE(lmp) & RTLD_NOW) == 0)) 858 noplt = 1; 859 860 /* 861 * Loop through relocations. 862 */ 863 while (relbgn < relend) { 864 mmapobj_result_t *mpp; 865 uint_t sb_flags = 0; 866 Addr vaddr; 867 868 rtype = (Byte)ELF_R_TYPE(((Rela *)relbgn)->r_info, M_MACH); 869 870 /* 871 * If this is a RELATIVE relocation in a shared object 872 * (the common case), and if we are not debugging, then 873 * jump into a tighter relocaiton loop (elf_reloc_relacount) 874 * Only make the jump if we've been given a hint on the 875 * number of relocations. 876 */ 877 if ((rtype == R_SPARC_RELATIVE) && 878 ((FLAGS(lmp) & FLG_RT_FIXED) == 0) && (DBG_ENABLED == 0)) { 879 if (relacount) { 880 relbgn = elf_reloc_relative_count(relbgn, 881 relacount, relsiz, basebgn, lmp, textrel); 882 relacount = 0; 883 } else { 884 relbgn = elf_reloc_relative(relbgn, relend, 885 relsiz, basebgn, lmp, textrel); 886 } 887 if (relbgn >= relend) 888 break; 889 rtype = (Byte)ELF_R_TYPE(((Rela *)relbgn)->r_info, 890 M_MACH); 891 } 892 893 roffset = ((Rela *)relbgn)->r_offset; 894 895 reladd = (long)(((Rela *)relbgn)->r_addend); 896 rsymndx = ELF_R_SYM(((Rela *)relbgn)->r_info); 897 898 rel = (Rela *)relbgn; 899 relbgn += relsiz; 900 901 /* 902 * Optimizations. 903 */ 904 if (rtype == R_SPARC_NONE) 905 continue; 906 if (noplt && ((ulong_t)rel >= pltbgn) && 907 ((ulong_t)rel < pltend)) { 908 relbgn = pltend; 909 continue; 910 } 911 912 if (rtype != R_SPARC_REGISTER) { 913 /* 914 * If this is a shared object, add the base address 915 * to offset. 916 */ 917 if (!(FLAGS(lmp) & FLG_RT_FIXED)) 918 roffset += basebgn; 919 920 /* 921 * If this relocation is not against part of the image 922 * mapped into memory we skip it. 923 */ 924 if ((mpp = find_segment((caddr_t)roffset, 925 lmp)) == NULL) { 926 elf_reloc_bad(lmp, (void *)rel, rtype, roffset, 927 rsymndx); 928 continue; 929 } 930 } 931 932 /* 933 * If we're promoting plts, determine if this one has already 934 * been written. An uninitialized plts' second instruction is a 935 * branch. 936 */ 937 if (plt) { 938 uchar_t *_roffset = (uchar_t *)roffset; 939 940 _roffset += M_PLT_INSSIZE; 941 /* LINTED */ 942 if ((*(uint_t *)_roffset & 943 (~(S_MASK(19)))) != M_BA_A_XCC) 944 continue; 945 } 946 947 binfo = 0; 948 pltndx = (ulong_t)-1; 949 pbtype = PLT_T_NONE; 950 951 /* 952 * If a symbol index is specified then get the symbol table 953 * entry, locate the symbol definition, and determine its 954 * address. 955 */ 956 if (rsymndx) { 957 /* 958 * Get the local symbol table entry. 959 */ 960 symref = (Sym *)((ulong_t)SYMTAB(lmp) + 961 (rsymndx * SYMENT(lmp))); 962 963 /* 964 * If this is a local symbol, just use the base address. 965 * (we should have no local relocations in the 966 * executable). 967 */ 968 if (ELF_ST_BIND(symref->st_info) == STB_LOCAL) { 969 value = basebgn; 970 name = (char *)0; 971 972 /* 973 * Special case TLS relocations. 974 */ 975 if ((rtype == R_SPARC_TLS_DTPMOD32) || 976 (rtype == R_SPARC_TLS_DTPMOD64)) { 977 /* 978 * Use the TLS modid. 979 */ 980 value = TLSMODID(lmp); 981 982 } else if ((rtype == R_SPARC_TLS_TPOFF32) || 983 (rtype == R_SPARC_TLS_TPOFF64)) { 984 if ((value = elf_static_tls(lmp, symref, 985 rel, rtype, 0, roffset, 0)) == 0) { 986 ret = 0; 987 break; 988 } 989 } 990 } else { 991 /* 992 * If the symbol index is equal to the previous 993 * symbol index relocation we processed then 994 * reuse the previous values. (Note that there 995 * have been cases where a relocation exists 996 * against a copy relocation symbol, our ld(1) 997 * should optimize this away, but make sure we 998 * don't use the same symbol information should 999 * this case exist). 1000 */ 1001 if ((rsymndx == psymndx) && 1002 (rtype != R_SPARC_COPY)) { 1003 /* LINTED */ 1004 if (psymdef == 0) { 1005 DBG_CALL(Dbg_bind_weak(lmp, 1006 (Addr)roffset, (Addr) 1007 (roffset - basebgn), name)); 1008 continue; 1009 } 1010 /* LINTED */ 1011 value = pvalue; 1012 /* LINTED */ 1013 name = pname; 1014 symdef = psymdef; 1015 /* LINTED */ 1016 symref = psymref; 1017 /* LINTED */ 1018 _lmp = plmp; 1019 /* LINTED */ 1020 binfo = pbinfo; 1021 1022 if ((LIST(_lmp)->lm_tflags | 1023 AFLAGS(_lmp)) & 1024 LML_TFLG_AUD_SYMBIND) { 1025 value = audit_symbind(lmp, _lmp, 1026 /* LINTED */ 1027 symdef, dsymndx, value, 1028 &sb_flags); 1029 } 1030 } else { 1031 Slookup sl; 1032 1033 /* 1034 * Lookup the symbol definition. 1035 * Initialize the symbol lookup data 1036 * structure. 1037 */ 1038 name = (char *)(STRTAB(lmp) + 1039 symref->st_name); 1040 1041 SLOOKUP_INIT(sl, name, lmp, 0, 1042 ld_entry_cnt, 0, rsymndx, symref, 1043 rtype, LKUP_STDRELOC); 1044 1045 symdef = lookup_sym(&sl, &_lmp, 1046 &binfo, in_nfavl); 1047 1048 /* 1049 * If the symbol is not found and the 1050 * reference was not to a weak symbol, 1051 * report an error. Weak references 1052 * may be unresolved. 1053 */ 1054 /* BEGIN CSTYLED */ 1055 if (symdef == 0) { 1056 if (sl.sl_bind != STB_WEAK) { 1057 if (elf_reloc_error(lmp, name, 1058 rel, binfo)) 1059 continue; 1060 1061 ret = 0; 1062 break; 1063 1064 } else { 1065 psymndx = rsymndx; 1066 psymdef = 0; 1067 1068 DBG_CALL(Dbg_bind_weak(lmp, 1069 (Addr)roffset, (Addr) 1070 (roffset - basebgn), name)); 1071 continue; 1072 } 1073 } 1074 /* END CSTYLED */ 1075 1076 /* 1077 * If symbol was found in an object 1078 * other than the referencing object 1079 * then record the binding. 1080 */ 1081 if ((lmp != _lmp) && ((FLAGS1(_lmp) & 1082 FL1_RT_NOINIFIN) == 0)) { 1083 if (aplist_test(&bound, _lmp, 1084 AL_CNT_RELBIND) == 0) { 1085 ret = 0; 1086 break; 1087 } 1088 } 1089 1090 /* 1091 * Calculate the location of definition; 1092 * symbol value plus base address of 1093 * containing shared object. 1094 */ 1095 if (IS_SIZE(rtype)) 1096 value = symdef->st_size; 1097 else 1098 value = symdef->st_value; 1099 1100 if (!(FLAGS(_lmp) & FLG_RT_FIXED) && 1101 !(IS_SIZE(rtype)) && 1102 (symdef->st_shndx != SHN_ABS) && 1103 (ELF_ST_TYPE(symdef->st_info) != 1104 STT_TLS)) 1105 value += ADDR(_lmp); 1106 1107 /* 1108 * Retain this symbol index and the 1109 * value in case it can be used for the 1110 * subsequent relocations. 1111 */ 1112 if (rtype != R_SPARC_COPY) { 1113 psymndx = rsymndx; 1114 pvalue = value; 1115 pname = name; 1116 psymdef = symdef; 1117 psymref = symref; 1118 plmp = _lmp; 1119 pbinfo = binfo; 1120 } 1121 if ((LIST(_lmp)->lm_tflags | 1122 AFLAGS(_lmp)) & 1123 LML_TFLG_AUD_SYMBIND) { 1124 /* LINTED */ 1125 dsymndx = (((uintptr_t)symdef - 1126 (uintptr_t)SYMTAB(_lmp)) / 1127 SYMENT(_lmp)); 1128 value = audit_symbind(lmp, _lmp, 1129 symdef, dsymndx, value, 1130 &sb_flags); 1131 } 1132 } 1133 1134 /* 1135 * If relocation is PC-relative, subtract 1136 * offset address. 1137 */ 1138 if (IS_PC_RELATIVE(rtype)) 1139 value -= roffset; 1140 1141 /* 1142 * Special case TLS relocations. 1143 */ 1144 if ((rtype == R_SPARC_TLS_DTPMOD32) || 1145 (rtype == R_SPARC_TLS_DTPMOD64)) { 1146 /* 1147 * Relocation value is the TLS modid. 1148 */ 1149 value = TLSMODID(_lmp); 1150 1151 } else if ((rtype == R_SPARC_TLS_TPOFF64) || 1152 (rtype == R_SPARC_TLS_TPOFF32)) { 1153 if ((value = elf_static_tls(_lmp, 1154 symdef, rel, rtype, name, roffset, 1155 value)) == 0) { 1156 ret = 0; 1157 break; 1158 } 1159 } 1160 } 1161 } else { 1162 /* 1163 * Special cases. 1164 */ 1165 if (rtype == R_SPARC_REGISTER) { 1166 /* 1167 * A register symbol associated with symbol 1168 * index 0 is initialized (i.e. relocated) to 1169 * a constant in the r_addend field rather than 1170 * to a symbol value. 1171 */ 1172 value = 0; 1173 1174 } else if ((rtype == R_SPARC_TLS_DTPMOD32) || 1175 (rtype == R_SPARC_TLS_DTPMOD64)) { 1176 /* 1177 * TLS relocation value is the TLS modid. 1178 */ 1179 value = TLSMODID(lmp); 1180 } else 1181 value = basebgn; 1182 name = (char *)0; 1183 } 1184 1185 DBG_CALL(Dbg_reloc_in(LIST(lmp), ELF_DBG_RTLD, M_MACH, 1186 M_REL_SHT_TYPE, rel, NULL, 0, name)); 1187 1188 /* 1189 * Make sure the segment is writable. 1190 */ 1191 if ((rtype != R_SPARC_REGISTER) && 1192 ((mpp->mr_prot & PROT_WRITE) == 0) && 1193 ((set_prot(lmp, mpp, 1) == 0) || 1194 (aplist_append(textrel, mpp, AL_CNT_TEXTREL) == NULL))) { 1195 ret = 0; 1196 break; 1197 } 1198 1199 /* 1200 * Call relocation routine to perform required relocation. 1201 */ 1202 switch (rtype) { 1203 case R_SPARC_REGISTER: 1204 /* 1205 * The v9 ABI 4.2.4 says that system objects may, 1206 * but are not required to, use register symbols 1207 * to inidcate how they use global registers. Thus 1208 * at least %g6, %g7 must be allowed in addition 1209 * to %g2 and %g3. 1210 */ 1211 value += reladd; 1212 if (roffset == STO_SPARC_REGISTER_G1) { 1213 set_sparc_g1(value); 1214 } else if (roffset == STO_SPARC_REGISTER_G2) { 1215 set_sparc_g2(value); 1216 } else if (roffset == STO_SPARC_REGISTER_G3) { 1217 set_sparc_g3(value); 1218 } else if (roffset == STO_SPARC_REGISTER_G4) { 1219 set_sparc_g4(value); 1220 } else if (roffset == STO_SPARC_REGISTER_G5) { 1221 set_sparc_g5(value); 1222 } else if (roffset == STO_SPARC_REGISTER_G6) { 1223 set_sparc_g6(value); 1224 } else if (roffset == STO_SPARC_REGISTER_G7) { 1225 set_sparc_g7(value); 1226 } else { 1227 eprintf(LIST(lmp), ERR_FATAL, 1228 MSG_INTL(MSG_REL_BADREG), NAME(lmp), 1229 EC_ADDR(roffset)); 1230 ret = 0; 1231 break; 1232 } 1233 1234 DBG_CALL(Dbg_reloc_apply_reg(LIST(lmp), ELF_DBG_RTLD, 1235 M_MACH, (Xword)roffset, (Xword)value)); 1236 break; 1237 case R_SPARC_COPY: 1238 if (elf_copy_reloc(name, symref, lmp, (void *)roffset, 1239 symdef, _lmp, (const void *)value) == 0) 1240 ret = 0; 1241 break; 1242 case R_SPARC_JMP_SLOT: 1243 pltndx = ((uintptr_t)rel - 1244 (uintptr_t)JMPREL(lmp)) / relsiz; 1245 1246 if (FLAGS(lmp) & FLG_RT_FIXED) 1247 vaddr = 0; 1248 else 1249 vaddr = ADDR(lmp); 1250 1251 if (((LIST(lmp)->lm_tflags | AFLAGS(lmp)) & 1252 (LML_TFLG_AUD_PLTENTER | LML_TFLG_AUD_PLTEXIT)) && 1253 AUDINFO(lmp)->ai_dynplts) { 1254 int fail = 0; 1255 /* LINTED */ 1256 uint_t symndx = (uint_t)(((uintptr_t)symdef - 1257 (uintptr_t)SYMTAB(_lmp)) / SYMENT(_lmp)); 1258 1259 (void) elf_plt_trace_write((caddr_t)vaddr, 1260 (Rela *)rel, lmp, _lmp, symdef, symndx, 1261 pltndx, (caddr_t)value, sb_flags, &fail); 1262 if (fail) 1263 ret = 0; 1264 } else { 1265 /* 1266 * Write standard PLT entry to jump directly 1267 * to newly bound function. 1268 */ 1269 DBG_CALL(Dbg_reloc_apply_val(LIST(lmp), 1270 ELF_DBG_RTLD, (Xword)roffset, 1271 (Xword)value)); 1272 pbtype = elf_plt_write((uintptr_t)vaddr, 1273 (uintptr_t)vaddr, (void *)rel, value, 1274 pltndx); 1275 } 1276 break; 1277 case R_SPARC_WDISP30: 1278 if (PLTPAD(lmp) && 1279 (S_INRANGE((Sxword)value, 29) == 0)) { 1280 void * plt = 0; 1281 1282 if (bindpltpad(lmp, &pltpadlist, 1283 value + roffset, &plt, 1284 NAME(_lmp), name) == 0) { 1285 ret = 0; 1286 break; 1287 } 1288 value = (Addr)((Addr)plt - roffset); 1289 } 1290 /* FALLTHROUGH */ 1291 default: 1292 value += reladd; 1293 if (IS_EXTOFFSET(rtype)) 1294 value += (Word)ELF_R_TYPE_DATA(rel->r_info); 1295 1296 /* 1297 * Write the relocation out. If this relocation is a 1298 * common basic write, skip the doreloc() engine. 1299 */ 1300 if ((rtype == R_SPARC_GLOB_DAT) || 1301 (rtype == R_SPARC_64)) { 1302 if (roffset & 0x7) { 1303 Conv_inv_buf_t inv_buf; 1304 1305 eprintf(LIST(lmp), ERR_FATAL, 1306 MSG_INTL(MSG_REL_NONALIGN), 1307 conv_reloc_SPARC_type(rtype, 1308 0, &inv_buf), 1309 NAME(lmp), demangle(name), 1310 EC_OFF(roffset)); 1311 ret = 0; 1312 } else 1313 *(ulong_t *)roffset += value; 1314 } else { 1315 if (do_reloc_rtld(rtype, (uchar_t *)roffset, 1316 (Xword *)&value, name, 1317 NAME(lmp), LIST(lmp)) == 0) 1318 ret = 0; 1319 } 1320 1321 /* 1322 * The value now contains the 'bit-shifted' value that 1323 * was or'ed into memory (this was set by 1324 * do_reloc_rtld()). 1325 */ 1326 DBG_CALL(Dbg_reloc_apply_val(LIST(lmp), ELF_DBG_RTLD, 1327 (Xword)roffset, (Xword)value)); 1328 1329 /* 1330 * If this relocation is against a text segment, make 1331 * sure that the instruction cache is flushed. 1332 */ 1333 if (textrel) 1334 iflush_range((caddr_t)roffset, 0x4); 1335 } 1336 1337 if ((ret == 0) && 1338 ((LIST(lmp)->lm_flags & LML_FLG_TRC_WARN) == 0)) 1339 break; 1340 1341 if (binfo) { 1342 DBG_CALL(Dbg_bind_global(lmp, (Addr)roffset, 1343 (Off)(roffset - basebgn), pltndx, pbtype, 1344 _lmp, (Addr)value, symdef->st_value, name, binfo)); 1345 } 1346 } 1347 1348 /* 1349 * Free up any items on the pltpadlist if it was allocated 1350 */ 1351 if (pltpadlist) 1352 free(pltpadlist); 1353 1354 return (relocate_finish(lmp, bound, ret)); 1355 } 1356 1357 /* 1358 * Provide a machine specific interface to the conversion routine. By calling 1359 * the machine specific version, rather than the generic version, we insure that 1360 * the data tables/strings for all known machine versions aren't dragged into 1361 * ld.so.1. 1362 */ 1363 const char * 1364 _conv_reloc_type(uint_t rel) 1365 { 1366 static Conv_inv_buf_t inv_buf; 1367 1368 return (conv_reloc_SPARC_type(rel, 0, &inv_buf)); 1369 } 1370
Indexes created Wed Feb 10 05:58:14 UTC 2010
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