17c478bd9Sstevel@tonic-gate /* 27c478bd9Sstevel@tonic-gate * CDDL HEADER START 37c478bd9Sstevel@tonic-gate * 47c478bd9Sstevel@tonic-gate * The contents of this file are subject to the terms of the 55aefb655Srie * Common Development and Distribution License (the "License"). 65aefb655Srie * You may not use this file except in compliance with the License. 77c478bd9Sstevel@tonic-gate * 87c478bd9Sstevel@tonic-gate * You can obtain a copy of the license at usr/src/OPENSOLARIS.LICENSE 97c478bd9Sstevel@tonic-gate * or http://www.opensolaris.org/os/licensing. 107c478bd9Sstevel@tonic-gate * See the License for the specific language governing permissions 117c478bd9Sstevel@tonic-gate * and limitations under the License. 127c478bd9Sstevel@tonic-gate * 137c478bd9Sstevel@tonic-gate * When distributing Covered Code, include this CDDL HEADER in each 147c478bd9Sstevel@tonic-gate * file and include the License file at usr/src/OPENSOLARIS.LICENSE. 157c478bd9Sstevel@tonic-gate * If applicable, add the following below this CDDL HEADER, with the 167c478bd9Sstevel@tonic-gate * fields enclosed by brackets "[]" replaced with your own identifying 177c478bd9Sstevel@tonic-gate * information: Portions Copyright [yyyy] [name of copyright owner] 187c478bd9Sstevel@tonic-gate * 197c478bd9Sstevel@tonic-gate * CDDL HEADER END 207c478bd9Sstevel@tonic-gate */ 21141040e8Srie 227c478bd9Sstevel@tonic-gate /* 237c478bd9Sstevel@tonic-gate * Copyright (c) 1990, 1991 UNIX System Laboratories, Inc. 247c478bd9Sstevel@tonic-gate * Copyright (c) 1988 AT&T 257c478bd9Sstevel@tonic-gate * All Rights Reserved 267c478bd9Sstevel@tonic-gate * 27cce0e03bSab * Copyright 2008 Sun Microsystems, Inc. All rights reserved. 287c478bd9Sstevel@tonic-gate * Use is subject to license terms. 297c478bd9Sstevel@tonic-gate */ 307c478bd9Sstevel@tonic-gate 31ba2be530Sab /* Get the x86 version of the relocation engine */ 32ba2be530Sab #define DO_RELOC_LIBLD_X86 33ba2be530Sab 347c478bd9Sstevel@tonic-gate #include <string.h> 357c478bd9Sstevel@tonic-gate #include <stdio.h> 367c478bd9Sstevel@tonic-gate #include <sys/elf_386.h> 375aefb655Srie #include <debug.h> 385aefb655Srie #include <reloc.h> 39ba2be530Sab #include <i386/machdep_x86.h> 407c478bd9Sstevel@tonic-gate #include "msg.h" 417c478bd9Sstevel@tonic-gate #include "_libld.h" 427c478bd9Sstevel@tonic-gate 43ba2be530Sab /* Forward declarations */ 44ba2be530Sab static Gotndx *ld_find_gotndx(List *, Gotref, Ofl_desc *, Rel_desc *); 45ba2be530Sab static Xword ld_calc_got_offset(Rel_desc *, Ofl_desc *); 46ba2be530Sab 47ba2be530Sab 48ba2be530Sab static Word 495aefb655Srie ld_init_rel(Rel_desc *reld, void *reloc) 507c478bd9Sstevel@tonic-gate { 517c478bd9Sstevel@tonic-gate Rel * rel = (Rel *)reloc; 527c478bd9Sstevel@tonic-gate 537c478bd9Sstevel@tonic-gate /* LINTED */ 54ba2be530Sab reld->rel_rtype = (Word)ELF_R_TYPE(rel->r_info, M_MACH); 557c478bd9Sstevel@tonic-gate reld->rel_roffset = rel->r_offset; 567c478bd9Sstevel@tonic-gate reld->rel_raddend = 0; 577c478bd9Sstevel@tonic-gate reld->rel_typedata = 0; 587c478bd9Sstevel@tonic-gate 597c478bd9Sstevel@tonic-gate return ((Word)ELF_R_SYM(rel->r_info)); 607c478bd9Sstevel@tonic-gate } 617c478bd9Sstevel@tonic-gate 62ba2be530Sab static void 635aefb655Srie ld_mach_eflags(Ehdr *ehdr, Ofl_desc *ofl) 647c478bd9Sstevel@tonic-gate { 655aefb655Srie ofl->ofl_dehdr->e_flags |= ehdr->e_flags; 667c478bd9Sstevel@tonic-gate } 677c478bd9Sstevel@tonic-gate 68ba2be530Sab static void 695aefb655Srie ld_mach_make_dynamic(Ofl_desc *ofl, size_t *cnt) 707c478bd9Sstevel@tonic-gate { 717c478bd9Sstevel@tonic-gate if (!(ofl->ofl_flags & FLG_OF_RELOBJ)) { 727c478bd9Sstevel@tonic-gate /* 737c478bd9Sstevel@tonic-gate * Create this entry if we are going to create a PLT table. 747c478bd9Sstevel@tonic-gate */ 757c478bd9Sstevel@tonic-gate if (ofl->ofl_pltcnt) 767c478bd9Sstevel@tonic-gate (*cnt)++; /* DT_PLTGOT */ 777c478bd9Sstevel@tonic-gate } 787c478bd9Sstevel@tonic-gate } 797c478bd9Sstevel@tonic-gate 80ba2be530Sab static void 81d326b23bSrie ld_mach_update_odynamic(Ofl_desc *ofl, Dyn **dyn) 827c478bd9Sstevel@tonic-gate { 835aefb655Srie if (((ofl->ofl_flags & FLG_OF_RELOBJ) == 0) && ofl->ofl_pltcnt) { 845aefb655Srie (*dyn)->d_tag = DT_PLTGOT; 855aefb655Srie if (ofl->ofl_osgot) 865aefb655Srie (*dyn)->d_un.d_ptr = ofl->ofl_osgot->os_shdr->sh_addr; 875aefb655Srie else 885aefb655Srie (*dyn)->d_un.d_ptr = 0; 895aefb655Srie (*dyn)++; 907c478bd9Sstevel@tonic-gate } 917c478bd9Sstevel@tonic-gate } 927c478bd9Sstevel@tonic-gate 93ba2be530Sab static Xword 945aefb655Srie ld_calc_plt_addr(Sym_desc *sdp, Ofl_desc *ofl) 957c478bd9Sstevel@tonic-gate { 967c478bd9Sstevel@tonic-gate Xword value; 977c478bd9Sstevel@tonic-gate 987c478bd9Sstevel@tonic-gate value = (Xword)(ofl->ofl_osplt->os_shdr->sh_addr) + 997c478bd9Sstevel@tonic-gate M_PLT_RESERVSZ + ((sdp->sd_aux->sa_PLTndx - 1) * M_PLT_ENTSIZE); 1007c478bd9Sstevel@tonic-gate return (value); 1017c478bd9Sstevel@tonic-gate } 1027c478bd9Sstevel@tonic-gate 1037c478bd9Sstevel@tonic-gate /* 1047c478bd9Sstevel@tonic-gate * Build a single plt entry - code is: 1057c478bd9Sstevel@tonic-gate * if (building a.out) 1067c478bd9Sstevel@tonic-gate * JMP *got_off 1077c478bd9Sstevel@tonic-gate * else 1087c478bd9Sstevel@tonic-gate * JMP *got_off@GOT(%ebx) 1097c478bd9Sstevel@tonic-gate * PUSHL &rel_off 1107c478bd9Sstevel@tonic-gate * JMP -n(%pc) # -n is pcrel offset to first plt entry 1117c478bd9Sstevel@tonic-gate * 1127c478bd9Sstevel@tonic-gate * The got_off@GOT entry gets filled with the address of the PUSHL, 1137c478bd9Sstevel@tonic-gate * so the first pass through the plt jumps back here, jumping 1147c478bd9Sstevel@tonic-gate * in turn to the first plt entry, which jumps to the dynamic 1157c478bd9Sstevel@tonic-gate * linker. The dynamic linker then patches the GOT, rerouting 1167c478bd9Sstevel@tonic-gate * future plt calls to the proper destination. 1177c478bd9Sstevel@tonic-gate */ 1187c478bd9Sstevel@tonic-gate static void 1197c478bd9Sstevel@tonic-gate plt_entry(Ofl_desc * ofl, Word rel_off, Sym_desc * sdp) 1207c478bd9Sstevel@tonic-gate { 121b3fbe5e6Sseizo uchar_t *pltent, *gotent; 1227c478bd9Sstevel@tonic-gate Sword plt_off; 1237c478bd9Sstevel@tonic-gate Word got_off; 124ba2be530Sab int bswap = (ofl->ofl_flags1 & FLG_OF1_ENCDIFF) != 0; 1257c478bd9Sstevel@tonic-gate 1267c478bd9Sstevel@tonic-gate got_off = sdp->sd_aux->sa_PLTGOTndx * M_GOT_ENTSIZE; 1277c478bd9Sstevel@tonic-gate plt_off = M_PLT_RESERVSZ + ((sdp->sd_aux->sa_PLTndx - 1) * 1287c478bd9Sstevel@tonic-gate M_PLT_ENTSIZE); 129b3fbe5e6Sseizo pltent = (uchar_t *)(ofl->ofl_osplt->os_outdata->d_buf) + plt_off; 130b3fbe5e6Sseizo gotent = (uchar_t *)(ofl->ofl_osgot->os_outdata->d_buf) + got_off; 1317c478bd9Sstevel@tonic-gate 1327c478bd9Sstevel@tonic-gate /* 1337c478bd9Sstevel@tonic-gate * Fill in the got entry with the address of the next instruction. 1347c478bd9Sstevel@tonic-gate */ 1357c478bd9Sstevel@tonic-gate /* LINTED */ 1367c478bd9Sstevel@tonic-gate *(Word *)gotent = ofl->ofl_osplt->os_shdr->sh_addr + plt_off + 137b3fbe5e6Sseizo M_PLT_INSSIZE; 138ba2be530Sab if (bswap) 139ba2be530Sab /* LINTED */ 140ba2be530Sab *(Word *)gotent = ld_bswap_Word(*(Word *)gotent); 1417c478bd9Sstevel@tonic-gate 1427c478bd9Sstevel@tonic-gate if (!(ofl->ofl_flags & FLG_OF_SHAROBJ)) { 1437c478bd9Sstevel@tonic-gate pltent[0] = M_SPECIAL_INST; 1447c478bd9Sstevel@tonic-gate pltent[1] = M_JMP_DISP_IND; 1457c478bd9Sstevel@tonic-gate pltent += 2; 1467c478bd9Sstevel@tonic-gate /* LINTED */ 1477c478bd9Sstevel@tonic-gate *(Word *)pltent = (Word)(ofl->ofl_osgot->os_shdr->sh_addr + 148de777a60Sab got_off); 1497c478bd9Sstevel@tonic-gate } else { 1507c478bd9Sstevel@tonic-gate pltent[0] = M_SPECIAL_INST; 1517c478bd9Sstevel@tonic-gate pltent[1] = M_JMP_REG_DISP_IND; 1527c478bd9Sstevel@tonic-gate pltent += 2; 1537c478bd9Sstevel@tonic-gate /* LINTED */ 1547c478bd9Sstevel@tonic-gate *(Word *)pltent = (Word)got_off; 1557c478bd9Sstevel@tonic-gate } 156ba2be530Sab if (bswap) 157ba2be530Sab /* LINTED */ 158ba2be530Sab *(Word *)pltent = ld_bswap_Word(*(Word *)pltent); 1597c478bd9Sstevel@tonic-gate pltent += 4; 1607c478bd9Sstevel@tonic-gate 1617c478bd9Sstevel@tonic-gate pltent[0] = M_INST_PUSHL; 1627c478bd9Sstevel@tonic-gate pltent++; 1637c478bd9Sstevel@tonic-gate /* LINTED */ 1647c478bd9Sstevel@tonic-gate *(Word *)pltent = (Word)rel_off; 165ba2be530Sab if (bswap) 166ba2be530Sab /* LINTED */ 167ba2be530Sab *(Word *)pltent = ld_bswap_Word(*(Word *)pltent); 1687c478bd9Sstevel@tonic-gate pltent += 4; 1697c478bd9Sstevel@tonic-gate 1707c478bd9Sstevel@tonic-gate plt_off = -(plt_off + 16); /* JMP, PUSHL, JMP take 16 bytes */ 1717c478bd9Sstevel@tonic-gate pltent[0] = M_INST_JMP; 1727c478bd9Sstevel@tonic-gate pltent++; 1737c478bd9Sstevel@tonic-gate /* LINTED */ 1747c478bd9Sstevel@tonic-gate *(Word *)pltent = (Word)plt_off; 175ba2be530Sab if (bswap) 176ba2be530Sab /* LINTED */ 177ba2be530Sab *(Word *)pltent = ld_bswap_Word(*(Word *)pltent); 1787c478bd9Sstevel@tonic-gate } 1797c478bd9Sstevel@tonic-gate 180ba2be530Sab static uintptr_t 1815aefb655Srie ld_perform_outreloc(Rel_desc * orsp, Ofl_desc * ofl) 1827c478bd9Sstevel@tonic-gate { 1837c478bd9Sstevel@tonic-gate Os_desc * relosp, * osp = 0; 1847c478bd9Sstevel@tonic-gate Word ndx, roffset, value; 1857c478bd9Sstevel@tonic-gate Rel rea; 1867c478bd9Sstevel@tonic-gate char *relbits; 1877c478bd9Sstevel@tonic-gate Sym_desc * sdp, * psym = (Sym_desc *)0; 1887c478bd9Sstevel@tonic-gate int sectmoved = 0; 1897c478bd9Sstevel@tonic-gate 1907c478bd9Sstevel@tonic-gate sdp = orsp->rel_sym; 1917c478bd9Sstevel@tonic-gate 1927c478bd9Sstevel@tonic-gate /* 1937c478bd9Sstevel@tonic-gate * If the section this relocation is against has been discarded 1947c478bd9Sstevel@tonic-gate * (-zignore), then also discard (skip) the relocation itself. 1957c478bd9Sstevel@tonic-gate */ 1967c478bd9Sstevel@tonic-gate if (orsp->rel_isdesc && ((orsp->rel_flags & 1977c478bd9Sstevel@tonic-gate (FLG_REL_GOT | FLG_REL_BSS | FLG_REL_PLT | FLG_REL_NOINFO)) == 0) && 1987c478bd9Sstevel@tonic-gate (orsp->rel_isdesc->is_flags & FLG_IS_DISCARD)) { 1995aefb655Srie DBG_CALL(Dbg_reloc_discard(ofl->ofl_lml, M_MACH, orsp)); 2007c478bd9Sstevel@tonic-gate return (1); 2017c478bd9Sstevel@tonic-gate } 2027c478bd9Sstevel@tonic-gate 2037c478bd9Sstevel@tonic-gate /* 2047c478bd9Sstevel@tonic-gate * If this is a relocation against a move table, or expanded move 2057c478bd9Sstevel@tonic-gate * table, adjust the relocation entries. 2067c478bd9Sstevel@tonic-gate */ 2077c478bd9Sstevel@tonic-gate if (orsp->rel_move) 2085aefb655Srie ld_adj_movereloc(ofl, orsp); 2097c478bd9Sstevel@tonic-gate 2107c478bd9Sstevel@tonic-gate /* 2117c478bd9Sstevel@tonic-gate * If this is a relocation against a section using a partial initialized 2127c478bd9Sstevel@tonic-gate * symbol, adjust the embedded symbol info. 2137c478bd9Sstevel@tonic-gate * 2147c478bd9Sstevel@tonic-gate * The second argument of the am_I_partial() is the value stored at the 2157c478bd9Sstevel@tonic-gate * target address relocation is going to be applied. 2167c478bd9Sstevel@tonic-gate */ 2177c478bd9Sstevel@tonic-gate if (ELF_ST_TYPE(sdp->sd_sym->st_info) == STT_SECTION) { 2187c478bd9Sstevel@tonic-gate if (ofl->ofl_parsym.head && 2197c478bd9Sstevel@tonic-gate (sdp->sd_isc->is_flags & FLG_IS_RELUPD) && 2207c478bd9Sstevel@tonic-gate /* LINTED */ 2215aefb655Srie (psym = ld_am_I_partial(orsp, *(Xword *) 222b3fbe5e6Sseizo ((uchar_t *)(orsp->rel_isdesc->is_indata->d_buf) + 2237c478bd9Sstevel@tonic-gate orsp->rel_roffset)))) { 2245aefb655Srie DBG_CALL(Dbg_move_outsctadj(ofl->ofl_lml, psym)); 2257c478bd9Sstevel@tonic-gate sectmoved = 1; 226de777a60Sab } 2277c478bd9Sstevel@tonic-gate } 2287c478bd9Sstevel@tonic-gate 2297c478bd9Sstevel@tonic-gate value = sdp->sd_sym->st_value; 2307c478bd9Sstevel@tonic-gate 2317c478bd9Sstevel@tonic-gate if (orsp->rel_flags & FLG_REL_GOT) { 2327c478bd9Sstevel@tonic-gate osp = ofl->ofl_osgot; 2335aefb655Srie roffset = (Word)ld_calc_got_offset(orsp, ofl); 2345aefb655Srie 2357c478bd9Sstevel@tonic-gate } else if (orsp->rel_flags & FLG_REL_PLT) { 2367c478bd9Sstevel@tonic-gate /* 2377c478bd9Sstevel@tonic-gate * Note that relocations for PLT's actually 2387c478bd9Sstevel@tonic-gate * cause a relocation againt the GOT. 2397c478bd9Sstevel@tonic-gate */ 2407c478bd9Sstevel@tonic-gate osp = ofl->ofl_osplt; 2417c478bd9Sstevel@tonic-gate roffset = (Word) (ofl->ofl_osgot->os_shdr->sh_addr) + 2427c478bd9Sstevel@tonic-gate sdp->sd_aux->sa_PLTGOTndx * M_GOT_ENTSIZE; 2437c478bd9Sstevel@tonic-gate 2447c478bd9Sstevel@tonic-gate plt_entry(ofl, osp->os_relosdesc->os_szoutrels, sdp); 2457c478bd9Sstevel@tonic-gate 2467c478bd9Sstevel@tonic-gate } else if (orsp->rel_flags & FLG_REL_BSS) { 2477c478bd9Sstevel@tonic-gate /* 2487c478bd9Sstevel@tonic-gate * This must be a R_386_COPY. For these set the roffset to 2497c478bd9Sstevel@tonic-gate * point to the new symbols location. 2507c478bd9Sstevel@tonic-gate */ 2517c478bd9Sstevel@tonic-gate osp = ofl->ofl_isbss->is_osdesc; 2527c478bd9Sstevel@tonic-gate roffset = (Word)value; 2537c478bd9Sstevel@tonic-gate } else { 2547c478bd9Sstevel@tonic-gate osp = orsp->rel_osdesc; 2557c478bd9Sstevel@tonic-gate 2567c478bd9Sstevel@tonic-gate /* 2577c478bd9Sstevel@tonic-gate * Calculate virtual offset of reference point; equals offset 2587c478bd9Sstevel@tonic-gate * into section + vaddr of section for loadable sections, or 2597c478bd9Sstevel@tonic-gate * offset plus section displacement for nonloadable sections. 2607c478bd9Sstevel@tonic-gate */ 2617c478bd9Sstevel@tonic-gate roffset = orsp->rel_roffset + 2627c478bd9Sstevel@tonic-gate (Off)_elf_getxoff(orsp->rel_isdesc->is_indata); 2637c478bd9Sstevel@tonic-gate if (!(ofl->ofl_flags & FLG_OF_RELOBJ)) 2647c478bd9Sstevel@tonic-gate roffset += orsp->rel_isdesc->is_osdesc-> 2657c478bd9Sstevel@tonic-gate os_shdr->sh_addr; 2667c478bd9Sstevel@tonic-gate } 2677c478bd9Sstevel@tonic-gate 2687c478bd9Sstevel@tonic-gate if ((osp == 0) || ((relosp = osp->os_relosdesc) == 0)) 2697c478bd9Sstevel@tonic-gate relosp = ofl->ofl_osrel; 2707c478bd9Sstevel@tonic-gate 2717c478bd9Sstevel@tonic-gate /* 2727c478bd9Sstevel@tonic-gate * Assign the symbols index for the output relocation. If the 2737c478bd9Sstevel@tonic-gate * relocation refers to a SECTION symbol then it's index is based upon 2747c478bd9Sstevel@tonic-gate * the output sections symbols index. Otherwise the index can be 2757c478bd9Sstevel@tonic-gate * derived from the symbols index itself. 2767c478bd9Sstevel@tonic-gate */ 2777c478bd9Sstevel@tonic-gate if (orsp->rel_rtype == R_386_RELATIVE) 2787c478bd9Sstevel@tonic-gate ndx = STN_UNDEF; 2797c478bd9Sstevel@tonic-gate else if ((orsp->rel_flags & FLG_REL_SCNNDX) || 2807c478bd9Sstevel@tonic-gate (ELF_ST_TYPE(sdp->sd_sym->st_info) == STT_SECTION)) { 2817c478bd9Sstevel@tonic-gate if (sectmoved == 0) { 2827c478bd9Sstevel@tonic-gate /* 2837c478bd9Sstevel@tonic-gate * Check for a null input section. This can 2847c478bd9Sstevel@tonic-gate * occur if this relocation references a symbol 2857c478bd9Sstevel@tonic-gate * generated by sym_add_sym(). 2867c478bd9Sstevel@tonic-gate */ 2877c478bd9Sstevel@tonic-gate if ((sdp->sd_isc != 0) && 2887c478bd9Sstevel@tonic-gate (sdp->sd_isc->is_osdesc != 0)) 2897c478bd9Sstevel@tonic-gate ndx = sdp->sd_isc->is_osdesc->os_scnsymndx; 2907c478bd9Sstevel@tonic-gate else 2917c478bd9Sstevel@tonic-gate ndx = sdp->sd_shndx; 2927c478bd9Sstevel@tonic-gate } else 293*35450702SAli Bahrami ndx = ofl->ofl_parexpnndx; 2947c478bd9Sstevel@tonic-gate } else 2957c478bd9Sstevel@tonic-gate ndx = sdp->sd_symndx; 2967c478bd9Sstevel@tonic-gate 297cce0e03bSab /* 298cce0e03bSab * If we have a replacement value for the relocation 299cce0e03bSab * target, put it in place now. 300cce0e03bSab */ 301cce0e03bSab if (orsp->rel_flags & FLG_REL_NADDEND) { 302cce0e03bSab Xword addend = orsp->rel_raddend; 303cce0e03bSab uchar_t *addr; 304cce0e03bSab 305cce0e03bSab /* 306cce0e03bSab * Get the address of the data item we need to modify. 307cce0e03bSab */ 308cce0e03bSab addr = (uchar_t *)((uintptr_t)orsp->rel_roffset + 309cce0e03bSab (uintptr_t)_elf_getxoff(orsp->rel_isdesc->is_indata)); 310cce0e03bSab addr += (uintptr_t)orsp->rel_osdesc->os_outdata->d_buf; 311cce0e03bSab if (ld_reloc_targval_set(ofl, orsp, addr, addend) == 0) 312cce0e03bSab return (S_ERROR); 313cce0e03bSab } 314cce0e03bSab 3157c478bd9Sstevel@tonic-gate relbits = (char *)relosp->os_outdata->d_buf; 3167c478bd9Sstevel@tonic-gate 3177c478bd9Sstevel@tonic-gate rea.r_info = ELF_R_INFO(ndx, orsp->rel_rtype); 3187c478bd9Sstevel@tonic-gate rea.r_offset = roffset; 3195aefb655Srie DBG_CALL(Dbg_reloc_out(ofl, ELF_DBG_LD, SHT_REL, &rea, relosp->os_name, 3205aefb655Srie orsp->rel_sname)); 3217c478bd9Sstevel@tonic-gate 3227c478bd9Sstevel@tonic-gate /* 3237c478bd9Sstevel@tonic-gate * Assert we haven't walked off the end of our relocation table. 3247c478bd9Sstevel@tonic-gate */ 3257c478bd9Sstevel@tonic-gate assert(relosp->os_szoutrels <= relosp->os_shdr->sh_size); 3267c478bd9Sstevel@tonic-gate 3277c478bd9Sstevel@tonic-gate (void) memcpy((relbits + relosp->os_szoutrels), 3287c478bd9Sstevel@tonic-gate (char *)&rea, sizeof (Rel)); 3297c478bd9Sstevel@tonic-gate relosp->os_szoutrels += sizeof (Rel); 3307c478bd9Sstevel@tonic-gate 3317c478bd9Sstevel@tonic-gate /* 3327c478bd9Sstevel@tonic-gate * Determine if this relocation is against a non-writable, allocatable 3337c478bd9Sstevel@tonic-gate * section. If so we may need to provide a text relocation diagnostic. 3347c478bd9Sstevel@tonic-gate * Note that relocations against the .plt (R_386_JMP_SLOT) actually 3357c478bd9Sstevel@tonic-gate * result in modifications to the .got. 3367c478bd9Sstevel@tonic-gate */ 3377c478bd9Sstevel@tonic-gate if (orsp->rel_rtype == R_386_JMP_SLOT) 3387c478bd9Sstevel@tonic-gate osp = ofl->ofl_osgot; 3397c478bd9Sstevel@tonic-gate 3405aefb655Srie ld_reloc_remain_entry(orsp, osp, ofl); 3417c478bd9Sstevel@tonic-gate return (1); 3427c478bd9Sstevel@tonic-gate } 3437c478bd9Sstevel@tonic-gate 3447c478bd9Sstevel@tonic-gate /* 3457c478bd9Sstevel@tonic-gate * i386 Instructions for TLS processing 3467c478bd9Sstevel@tonic-gate */ 347b3fbe5e6Sseizo static uchar_t tlsinstr_gd_ie[] = { 3487c478bd9Sstevel@tonic-gate /* 3497c478bd9Sstevel@tonic-gate * 0x00 movl %gs:0x0, %eax 3507c478bd9Sstevel@tonic-gate */ 3517c478bd9Sstevel@tonic-gate 0x65, 0xa1, 0x00, 0x00, 0x00, 0x00, 3527c478bd9Sstevel@tonic-gate /* 3537c478bd9Sstevel@tonic-gate * 0x06 addl x(%eax), %eax 3547c478bd9Sstevel@tonic-gate * 0x0c ... 3557c478bd9Sstevel@tonic-gate */ 3567c478bd9Sstevel@tonic-gate 0x03, 0x80, 0x00, 0x00, 0x00, 0x00 3577c478bd9Sstevel@tonic-gate }; 3587c478bd9Sstevel@tonic-gate 359b3fbe5e6Sseizo static uchar_t tlsinstr_gd_le[] = { 3607c478bd9Sstevel@tonic-gate /* 3617c478bd9Sstevel@tonic-gate * 0x00 movl %gs:0x0, %eax 3627c478bd9Sstevel@tonic-gate */ 3637c478bd9Sstevel@tonic-gate 0x65, 0xa1, 0x00, 0x00, 0x00, 0x00, 3647c478bd9Sstevel@tonic-gate /* 3657c478bd9Sstevel@tonic-gate * 0x06 addl $0x0, %eax 3667c478bd9Sstevel@tonic-gate */ 3677c478bd9Sstevel@tonic-gate 0x05, 0x00, 0x00, 0x00, 0x00, 3687c478bd9Sstevel@tonic-gate /* 3697c478bd9Sstevel@tonic-gate * 0x0b nop 3707c478bd9Sstevel@tonic-gate * 0x0c 3717c478bd9Sstevel@tonic-gate */ 3727c478bd9Sstevel@tonic-gate 0x90 3737c478bd9Sstevel@tonic-gate }; 3747c478bd9Sstevel@tonic-gate 375b3fbe5e6Sseizo static uchar_t tlsinstr_gd_ie_movgs[] = { 3767c478bd9Sstevel@tonic-gate /* 3777c478bd9Sstevel@tonic-gate * movl %gs:0x0,%eax 3787c478bd9Sstevel@tonic-gate */ 3797c478bd9Sstevel@tonic-gate 0x65, 0xa1, 0x00, 0x00, 0x00, 00 3807c478bd9Sstevel@tonic-gate }; 3817c478bd9Sstevel@tonic-gate 3827c478bd9Sstevel@tonic-gate #define TLS_GD_IE_MOV 0x8b /* movl opcode */ 3837c478bd9Sstevel@tonic-gate #define TLS_GD_IE_POP 0x58 /* popl + reg */ 3847c478bd9Sstevel@tonic-gate 3857c478bd9Sstevel@tonic-gate #define TLS_GD_LE_MOVL 0xb8 /* movl + reg */ 3867c478bd9Sstevel@tonic-gate 3877c478bd9Sstevel@tonic-gate #define TLS_NOP 0x90 /* NOP instruction */ 3887c478bd9Sstevel@tonic-gate 3897c478bd9Sstevel@tonic-gate #define MODRM_MSK_MOD 0xc0 3907c478bd9Sstevel@tonic-gate #define MODRM_MSK_RO 0x38 3917c478bd9Sstevel@tonic-gate #define MODRM_MSK_RM 0x07 3927c478bd9Sstevel@tonic-gate 3937c478bd9Sstevel@tonic-gate #define SIB_MSK_SS 0xc0 3947c478bd9Sstevel@tonic-gate #define SIB_MSK_IND 0x38 3957c478bd9Sstevel@tonic-gate #define SIB_MSK_BS 0x07 3967c478bd9Sstevel@tonic-gate 3975aefb655Srie static Fixupret 3985aefb655Srie tls_fixups(Ofl_desc *ofl, Rel_desc *arsp) 3997c478bd9Sstevel@tonic-gate { 4007c478bd9Sstevel@tonic-gate Sym_desc *sdp = arsp->rel_sym; 4017c478bd9Sstevel@tonic-gate Word rtype = arsp->rel_rtype; 402b3fbe5e6Sseizo uchar_t *offset, r1, r2; 4037c478bd9Sstevel@tonic-gate 404b3fbe5e6Sseizo offset = (uchar_t *)((uintptr_t)arsp->rel_roffset + 405b3fbe5e6Sseizo (uintptr_t)_elf_getxoff(arsp->rel_isdesc->is_indata) + 406b3fbe5e6Sseizo (uintptr_t)arsp->rel_osdesc->os_outdata->d_buf); 4077c478bd9Sstevel@tonic-gate 4087c478bd9Sstevel@tonic-gate if (sdp->sd_ref == REF_DYN_NEED) { 4097c478bd9Sstevel@tonic-gate /* 4107c478bd9Sstevel@tonic-gate * IE reference model 4117c478bd9Sstevel@tonic-gate */ 4127c478bd9Sstevel@tonic-gate switch (rtype) { 4137c478bd9Sstevel@tonic-gate case R_386_TLS_GD: 4147c478bd9Sstevel@tonic-gate /* 4157c478bd9Sstevel@tonic-gate * Transition: 4167c478bd9Sstevel@tonic-gate * 0x0 leal x@tlsgd(,r1,1), %eax 4177c478bd9Sstevel@tonic-gate * 0x7 call ___tls_get_addr 4187c478bd9Sstevel@tonic-gate * 0xc 4197c478bd9Sstevel@tonic-gate * To: 4207c478bd9Sstevel@tonic-gate * 0x0 movl %gs:0, %eax 4217c478bd9Sstevel@tonic-gate * 0x6 addl x@gotntpoff(r1), %eax 4227c478bd9Sstevel@tonic-gate */ 4235aefb655Srie DBG_CALL(Dbg_reloc_transition(ofl->ofl_lml, M_MACH, 424051d39bbSrie R_386_TLS_GOTIE, arsp)); 4257c478bd9Sstevel@tonic-gate arsp->rel_rtype = R_386_TLS_GOTIE; 4267c478bd9Sstevel@tonic-gate arsp->rel_roffset += 5; 4275aefb655Srie 4287c478bd9Sstevel@tonic-gate /* 429051d39bbSrie * Adjust 'offset' to beginning of instruction 4307c478bd9Sstevel@tonic-gate * sequence. 4317c478bd9Sstevel@tonic-gate */ 4327c478bd9Sstevel@tonic-gate offset -= 3; 4337c478bd9Sstevel@tonic-gate r1 = (offset[2] & SIB_MSK_IND) >> 3; 4347c478bd9Sstevel@tonic-gate (void) memcpy(offset, tlsinstr_gd_ie, 4355aefb655Srie sizeof (tlsinstr_gd_ie)); 4365aefb655Srie 4377c478bd9Sstevel@tonic-gate /* 4387c478bd9Sstevel@tonic-gate * set register %r1 into the addl 4397c478bd9Sstevel@tonic-gate * instruction. 4407c478bd9Sstevel@tonic-gate */ 4417c478bd9Sstevel@tonic-gate offset[0x7] |= r1; 4427c478bd9Sstevel@tonic-gate return (FIX_RELOC); 4435aefb655Srie 4447c478bd9Sstevel@tonic-gate case R_386_TLS_GD_PLT: 4457c478bd9Sstevel@tonic-gate /* 4467c478bd9Sstevel@tonic-gate * Fixup done via the TLS_GD relocation 4477c478bd9Sstevel@tonic-gate */ 4485aefb655Srie DBG_CALL(Dbg_reloc_transition(ofl->ofl_lml, M_MACH, 449051d39bbSrie R_386_NONE, arsp)); 4507c478bd9Sstevel@tonic-gate return (FIX_DONE); 4517c478bd9Sstevel@tonic-gate } 4527c478bd9Sstevel@tonic-gate } 4537c478bd9Sstevel@tonic-gate 4547c478bd9Sstevel@tonic-gate /* 4557c478bd9Sstevel@tonic-gate * LE reference model 4567c478bd9Sstevel@tonic-gate */ 4577c478bd9Sstevel@tonic-gate switch (rtype) { 4587c478bd9Sstevel@tonic-gate case R_386_TLS_GD: 4597c478bd9Sstevel@tonic-gate /* 4607c478bd9Sstevel@tonic-gate * Transition: 4617c478bd9Sstevel@tonic-gate * 0x0 leal x@tlsgd(,r1,1), %eax 4627c478bd9Sstevel@tonic-gate * 0x7 call ___tls_get_addr 4637c478bd9Sstevel@tonic-gate * 0xc 4647c478bd9Sstevel@tonic-gate * To: 4657c478bd9Sstevel@tonic-gate * 0x0 movl %gs:0, %eax 4667c478bd9Sstevel@tonic-gate * 0x6 addl $x@ntpoff, %eax 4677c478bd9Sstevel@tonic-gate * 0xb nop 4687c478bd9Sstevel@tonic-gate * 0xc 4697c478bd9Sstevel@tonic-gate */ 4705aefb655Srie DBG_CALL(Dbg_reloc_transition(ofl->ofl_lml, M_MACH, 471051d39bbSrie R_386_TLS_LE, arsp)); 4727c478bd9Sstevel@tonic-gate 4737c478bd9Sstevel@tonic-gate arsp->rel_rtype = R_386_TLS_LE; 4747c478bd9Sstevel@tonic-gate arsp->rel_roffset += 4; 4755aefb655Srie 4767c478bd9Sstevel@tonic-gate /* 477051d39bbSrie * Adjust 'offset' to beginning of instruction 4787c478bd9Sstevel@tonic-gate * sequence. 4797c478bd9Sstevel@tonic-gate */ 4807c478bd9Sstevel@tonic-gate offset -= 3; 4817c478bd9Sstevel@tonic-gate (void) memcpy(offset, tlsinstr_gd_le, 4825aefb655Srie sizeof (tlsinstr_gd_le)); 4837c478bd9Sstevel@tonic-gate return (FIX_RELOC); 4845aefb655Srie 4857c478bd9Sstevel@tonic-gate case R_386_TLS_GD_PLT: 4867c478bd9Sstevel@tonic-gate case R_386_PLT32: 4877c478bd9Sstevel@tonic-gate /* 4887c478bd9Sstevel@tonic-gate * Fixup done via the TLS_GD relocation 4897c478bd9Sstevel@tonic-gate */ 4905aefb655Srie DBG_CALL(Dbg_reloc_transition(ofl->ofl_lml, M_MACH, 491051d39bbSrie R_386_NONE, arsp)); 4927c478bd9Sstevel@tonic-gate return (FIX_DONE); 4935aefb655Srie 4947c478bd9Sstevel@tonic-gate case R_386_TLS_LDM_PLT: 4955aefb655Srie DBG_CALL(Dbg_reloc_transition(ofl->ofl_lml, M_MACH, 496051d39bbSrie R_386_NONE, arsp)); 4975aefb655Srie 4987c478bd9Sstevel@tonic-gate /* 4997c478bd9Sstevel@tonic-gate * Transition: 5007c478bd9Sstevel@tonic-gate * call __tls_get_addr() 5017c478bd9Sstevel@tonic-gate * to: 5027c478bd9Sstevel@tonic-gate * nop 5037c478bd9Sstevel@tonic-gate * nop 5047c478bd9Sstevel@tonic-gate * nop 5057c478bd9Sstevel@tonic-gate * nop 5067c478bd9Sstevel@tonic-gate * nop 5077c478bd9Sstevel@tonic-gate */ 5087c478bd9Sstevel@tonic-gate *(offset - 1) = TLS_NOP; 5097c478bd9Sstevel@tonic-gate *(offset) = TLS_NOP; 5107c478bd9Sstevel@tonic-gate *(offset + 1) = TLS_NOP; 5117c478bd9Sstevel@tonic-gate *(offset + 2) = TLS_NOP; 5127c478bd9Sstevel@tonic-gate *(offset + 3) = TLS_NOP; 5137c478bd9Sstevel@tonic-gate return (FIX_DONE); 5145aefb655Srie 5157c478bd9Sstevel@tonic-gate case R_386_TLS_LDM: 5165aefb655Srie DBG_CALL(Dbg_reloc_transition(ofl->ofl_lml, M_MACH, 517051d39bbSrie R_386_NONE, arsp)); 5185aefb655Srie 5197c478bd9Sstevel@tonic-gate /* 5207c478bd9Sstevel@tonic-gate * Transition: 5217c478bd9Sstevel@tonic-gate * 5227c478bd9Sstevel@tonic-gate * 0x00 leal x1@tlsldm(%ebx), %eax 5237c478bd9Sstevel@tonic-gate * 0x06 call ___tls_get_addr 5247c478bd9Sstevel@tonic-gate * 5257c478bd9Sstevel@tonic-gate * to: 5267c478bd9Sstevel@tonic-gate * 5277c478bd9Sstevel@tonic-gate * 0x00 movl %gs:0, %eax 5287c478bd9Sstevel@tonic-gate */ 5297c478bd9Sstevel@tonic-gate (void) memcpy(offset - 2, tlsinstr_gd_ie_movgs, 5305aefb655Srie sizeof (tlsinstr_gd_ie_movgs)); 5317c478bd9Sstevel@tonic-gate return (FIX_DONE); 5325aefb655Srie 5337c478bd9Sstevel@tonic-gate case R_386_TLS_LDO_32: 5347c478bd9Sstevel@tonic-gate /* 5357c478bd9Sstevel@tonic-gate * Instructions: 5367c478bd9Sstevel@tonic-gate * 5377c478bd9Sstevel@tonic-gate * 0x10 leal x1@dtpoff(%eax), %edx R_386_TLS_LDO_32 5387c478bd9Sstevel@tonic-gate * to 5397c478bd9Sstevel@tonic-gate * 0x10 leal x1@ntpoff(%eax), %edx R_386_TLS_LE 5407c478bd9Sstevel@tonic-gate * 5417c478bd9Sstevel@tonic-gate */ 5427c478bd9Sstevel@tonic-gate offset -= 2; 5437c478bd9Sstevel@tonic-gate 5445aefb655Srie DBG_CALL(Dbg_reloc_transition(ofl->ofl_lml, M_MACH, 545051d39bbSrie R_386_TLS_LE, arsp)); 5467c478bd9Sstevel@tonic-gate arsp->rel_rtype = R_386_TLS_LE; 5477c478bd9Sstevel@tonic-gate return (FIX_RELOC); 5485aefb655Srie 5497c478bd9Sstevel@tonic-gate case R_386_TLS_GOTIE: 5507c478bd9Sstevel@tonic-gate /* 5517c478bd9Sstevel@tonic-gate * These transitions are a little different than the 5527c478bd9Sstevel@tonic-gate * others, in that we could have multiple instructions 5537c478bd9Sstevel@tonic-gate * pointed to by a single relocation. Depending upon the 5547c478bd9Sstevel@tonic-gate * instruction, we perform a different code transition. 5557c478bd9Sstevel@tonic-gate * 5567c478bd9Sstevel@tonic-gate * Here's the known transitions: 5577c478bd9Sstevel@tonic-gate * 5587c478bd9Sstevel@tonic-gate * 1) movl foo@gotntpoff(%reg1), %reg2 5597c478bd9Sstevel@tonic-gate * 0x8b, 0x80 | (reg2 << 3) | reg1, foo@gotntpoff 5607c478bd9Sstevel@tonic-gate * 5617c478bd9Sstevel@tonic-gate * 2) addl foo@gotntpoff(%reg1), %reg2 5627c478bd9Sstevel@tonic-gate * 0x03, 0x80 | (reg2 << 3) | reg1, foo@gotntpoff 5637c478bd9Sstevel@tonic-gate * 5647c478bd9Sstevel@tonic-gate * Transitions IE -> LE 5657c478bd9Sstevel@tonic-gate * 5667c478bd9Sstevel@tonic-gate * 1) movl $foo@ntpoff, %reg2 5677c478bd9Sstevel@tonic-gate * 0xc7, 0xc0 | reg2, foo@ntpoff 5687c478bd9Sstevel@tonic-gate * 5697c478bd9Sstevel@tonic-gate * 2) addl $foo@ntpoff, %reg2 5707c478bd9Sstevel@tonic-gate * 0x81, 0xc0 | reg2, foo@ntpoff 5717c478bd9Sstevel@tonic-gate * 5727c478bd9Sstevel@tonic-gate * Note: reg1 != 4 (%esp) 5737c478bd9Sstevel@tonic-gate */ 5745aefb655Srie DBG_CALL(Dbg_reloc_transition(ofl->ofl_lml, M_MACH, 575051d39bbSrie R_386_TLS_LE, arsp)); 5767c478bd9Sstevel@tonic-gate arsp->rel_rtype = R_386_TLS_LE; 5775aefb655Srie 5787c478bd9Sstevel@tonic-gate offset -= 2; 5797c478bd9Sstevel@tonic-gate r2 = (offset[1] & MODRM_MSK_RO) >> 3; 5807c478bd9Sstevel@tonic-gate if (offset[0] == 0x8b) { 5817c478bd9Sstevel@tonic-gate /* case 1 above */ 5827c478bd9Sstevel@tonic-gate offset[0] = 0xc7; /* movl */ 5837c478bd9Sstevel@tonic-gate offset[1] = 0xc0 | r2; 5847c478bd9Sstevel@tonic-gate return (FIX_RELOC); 5857c478bd9Sstevel@tonic-gate } 5867c478bd9Sstevel@tonic-gate 5877c478bd9Sstevel@tonic-gate if (offset[0] == 0x03) { 5887c478bd9Sstevel@tonic-gate /* case 2 above */ 5897c478bd9Sstevel@tonic-gate assert(offset[0] == 0x03); 5907c478bd9Sstevel@tonic-gate offset[0] = 0x81; /* addl */ 5917c478bd9Sstevel@tonic-gate offset[1] = 0xc0 | r2; 5927c478bd9Sstevel@tonic-gate return (FIX_RELOC); 5937c478bd9Sstevel@tonic-gate } 5947c478bd9Sstevel@tonic-gate 5957c478bd9Sstevel@tonic-gate /* 5967c478bd9Sstevel@tonic-gate * Unexpected instruction sequence - fatal error. 5977c478bd9Sstevel@tonic-gate */ 598de777a60Sab { 599de777a60Sab Conv_inv_buf_t inv_buf; 600de777a60Sab 601de777a60Sab eprintf(ofl->ofl_lml, ERR_FATAL, 602de777a60Sab MSG_INTL(MSG_REL_BADTLSINS), 603de777a60Sab conv_reloc_386_type(arsp->rel_rtype, 0, &inv_buf), 604de777a60Sab arsp->rel_isdesc->is_file->ifl_name, 605de777a60Sab demangle(arsp->rel_sname), 606de777a60Sab arsp->rel_isdesc->is_name, 607de777a60Sab EC_OFF(arsp->rel_roffset)); 608de777a60Sab } 6097c478bd9Sstevel@tonic-gate return (FIX_ERROR); 6105aefb655Srie 6117c478bd9Sstevel@tonic-gate case R_386_TLS_IE: 6127c478bd9Sstevel@tonic-gate /* 6137c478bd9Sstevel@tonic-gate * These transitions are a little different than the 6147c478bd9Sstevel@tonic-gate * others, in that we could have multiple instructions 6157c478bd9Sstevel@tonic-gate * pointed to by a single relocation. Depending upon the 6167c478bd9Sstevel@tonic-gate * instruction, we perform a different code transition. 6177c478bd9Sstevel@tonic-gate * 6187c478bd9Sstevel@tonic-gate * Here's the known transitions: 6197c478bd9Sstevel@tonic-gate * 1) movl foo@indntpoff, %eax 6207c478bd9Sstevel@tonic-gate * 0xa1, foo@indntpoff 6217c478bd9Sstevel@tonic-gate * 6227c478bd9Sstevel@tonic-gate * 2) movl foo@indntpoff, %eax 6237c478bd9Sstevel@tonic-gate * 0x8b, 0x05 | (reg << 3), foo@gotntpoff 6247c478bd9Sstevel@tonic-gate * 6257c478bd9Sstevel@tonic-gate * 3) addl foo@indntpoff, %eax 6267c478bd9Sstevel@tonic-gate * 0x03, 0x05 | (reg << 3), foo@gotntpoff 6277c478bd9Sstevel@tonic-gate * 6287c478bd9Sstevel@tonic-gate * Transitions IE -> LE 6297c478bd9Sstevel@tonic-gate * 6307c478bd9Sstevel@tonic-gate * 1) movl $foo@ntpoff, %eax 6317c478bd9Sstevel@tonic-gate * 0xb8, foo@ntpoff 6327c478bd9Sstevel@tonic-gate * 6337c478bd9Sstevel@tonic-gate * 2) movl $foo@ntpoff, %reg 6347c478bd9Sstevel@tonic-gate * 0xc7, 0xc0 | reg, foo@ntpoff 6357c478bd9Sstevel@tonic-gate * 6367c478bd9Sstevel@tonic-gate * 3) addl $foo@ntpoff, %reg 6377c478bd9Sstevel@tonic-gate * 0x81, 0xc0 | reg, foo@ntpoff 6387c478bd9Sstevel@tonic-gate */ 6397c478bd9Sstevel@tonic-gate arsp->rel_rtype = R_386_TLS_LE; 6407c478bd9Sstevel@tonic-gate offset--; 6417c478bd9Sstevel@tonic-gate if (offset[0] == 0xa1) { 6427c478bd9Sstevel@tonic-gate /* case 1 above */ 6437c478bd9Sstevel@tonic-gate offset[0] = 0xb8; /* movl */ 6447c478bd9Sstevel@tonic-gate return (FIX_RELOC); 6457c478bd9Sstevel@tonic-gate } 6467c478bd9Sstevel@tonic-gate 6477c478bd9Sstevel@tonic-gate offset--; 6487c478bd9Sstevel@tonic-gate if (offset[0] == 0x8b) { 6497c478bd9Sstevel@tonic-gate /* case 2 above */ 6507c478bd9Sstevel@tonic-gate r2 = (offset[1] & MODRM_MSK_RO) >> 3; 6517c478bd9Sstevel@tonic-gate offset[0] = 0xc7; /* movl */ 6527c478bd9Sstevel@tonic-gate offset[1] = 0xc0 | r2; 6537c478bd9Sstevel@tonic-gate return (FIX_RELOC); 6547c478bd9Sstevel@tonic-gate } 6557c478bd9Sstevel@tonic-gate if (offset[0] == 0x03) { 6567c478bd9Sstevel@tonic-gate /* case 3 above */ 6577c478bd9Sstevel@tonic-gate r2 = (offset[1] & MODRM_MSK_RO) >> 3; 6587c478bd9Sstevel@tonic-gate offset[0] = 0x81; /* addl */ 6597c478bd9Sstevel@tonic-gate offset[1] = 0xc0 | r2; 6607c478bd9Sstevel@tonic-gate return (FIX_RELOC); 6617c478bd9Sstevel@tonic-gate } 6627c478bd9Sstevel@tonic-gate /* 6637c478bd9Sstevel@tonic-gate * Unexpected instruction sequence - fatal error. 6647c478bd9Sstevel@tonic-gate */ 665de777a60Sab { 666de777a60Sab Conv_inv_buf_t inv_buf; 667de777a60Sab 668de777a60Sab eprintf(ofl->ofl_lml, ERR_FATAL, 669de777a60Sab MSG_INTL(MSG_REL_BADTLSINS), 670de777a60Sab conv_reloc_386_type(arsp->rel_rtype, 0, &inv_buf), 671de777a60Sab arsp->rel_isdesc->is_file->ifl_name, 672de777a60Sab demangle(arsp->rel_sname), 673de777a60Sab arsp->rel_isdesc->is_name, 674de777a60Sab EC_OFF(arsp->rel_roffset)); 675de777a60Sab } 6767c478bd9Sstevel@tonic-gate return (FIX_ERROR); 6777c478bd9Sstevel@tonic-gate } 6787c478bd9Sstevel@tonic-gate return (FIX_RELOC); 6797c478bd9Sstevel@tonic-gate } 6807c478bd9Sstevel@tonic-gate 681ba2be530Sab static uintptr_t 6825aefb655Srie ld_do_activerelocs(Ofl_desc *ofl) 6837c478bd9Sstevel@tonic-gate { 684141040e8Srie Rel_desc *arsp; 685141040e8Srie Rel_cache *rcp; 686141040e8Srie Listnode *lnp; 6877c478bd9Sstevel@tonic-gate uintptr_t return_code = 1; 6881d9df23bSab ofl_flag_t flags = ofl->ofl_flags; 6897c478bd9Sstevel@tonic-gate 6907010c12aSrie if (ofl->ofl_actrels.head) 6917010c12aSrie DBG_CALL(Dbg_reloc_doact_title(ofl->ofl_lml)); 6927010c12aSrie 6937c478bd9Sstevel@tonic-gate /* 694141040e8Srie * Process active relocations. 6957c478bd9Sstevel@tonic-gate */ 6967c478bd9Sstevel@tonic-gate for (LIST_TRAVERSE(&ofl->ofl_actrels, lnp, rcp)) { 6977c478bd9Sstevel@tonic-gate /* LINTED */ 6987c478bd9Sstevel@tonic-gate for (arsp = (Rel_desc *)(rcp + 1); 6997c478bd9Sstevel@tonic-gate arsp < rcp->rc_free; arsp++) { 700b3fbe5e6Sseizo uchar_t *addr; 701141040e8Srie Xword value; 7027c478bd9Sstevel@tonic-gate Sym_desc *sdp; 7037c478bd9Sstevel@tonic-gate const char *ifl_name; 704141040e8Srie Xword refaddr; 7057c478bd9Sstevel@tonic-gate int moved = 0; 7067c478bd9Sstevel@tonic-gate Gotref gref; 7077c478bd9Sstevel@tonic-gate 7087c478bd9Sstevel@tonic-gate /* 7097c478bd9Sstevel@tonic-gate * If the section this relocation is against has been 7107c478bd9Sstevel@tonic-gate * discarded (-zignore), then discard (skip) the 7117c478bd9Sstevel@tonic-gate * relocation itself. 7127c478bd9Sstevel@tonic-gate */ 7137c478bd9Sstevel@tonic-gate if ((arsp->rel_isdesc->is_flags & FLG_IS_DISCARD) && 7147c478bd9Sstevel@tonic-gate ((arsp->rel_flags & 7157c478bd9Sstevel@tonic-gate (FLG_REL_GOT | FLG_REL_BSS | 7167c478bd9Sstevel@tonic-gate FLG_REL_PLT | FLG_REL_NOINFO)) == 0)) { 7175aefb655Srie DBG_CALL(Dbg_reloc_discard(ofl->ofl_lml, 7185aefb655Srie M_MACH, arsp)); 7197c478bd9Sstevel@tonic-gate continue; 7207c478bd9Sstevel@tonic-gate } 7217c478bd9Sstevel@tonic-gate 7227c478bd9Sstevel@tonic-gate /* 7237c478bd9Sstevel@tonic-gate * We deteremine what the 'got reference' 7247c478bd9Sstevel@tonic-gate * model (if required) is at this point. This 7257c478bd9Sstevel@tonic-gate * needs to be done before tls_fixup() since 7267c478bd9Sstevel@tonic-gate * it may 'transition' our instructions. 7277c478bd9Sstevel@tonic-gate * 7287c478bd9Sstevel@tonic-gate * The got table entries have already been assigned, 7297c478bd9Sstevel@tonic-gate * and we bind to those initial entries. 7307c478bd9Sstevel@tonic-gate */ 7317c478bd9Sstevel@tonic-gate if (arsp->rel_flags & FLG_REL_DTLS) 7327c478bd9Sstevel@tonic-gate gref = GOT_REF_TLSGD; 7337c478bd9Sstevel@tonic-gate else if (arsp->rel_flags & FLG_REL_MTLS) 7347c478bd9Sstevel@tonic-gate gref = GOT_REF_TLSLD; 7357c478bd9Sstevel@tonic-gate else if (arsp->rel_flags & FLG_REL_STLS) 7367c478bd9Sstevel@tonic-gate gref = GOT_REF_TLSIE; 7377c478bd9Sstevel@tonic-gate else 7387c478bd9Sstevel@tonic-gate gref = GOT_REF_GENERIC; 7397c478bd9Sstevel@tonic-gate 7407c478bd9Sstevel@tonic-gate /* 7417c478bd9Sstevel@tonic-gate * Perform any required TLS fixups. 7427c478bd9Sstevel@tonic-gate */ 7437c478bd9Sstevel@tonic-gate if (arsp->rel_flags & FLG_REL_TLSFIX) { 7447c478bd9Sstevel@tonic-gate Fixupret ret; 7457c478bd9Sstevel@tonic-gate 7465aefb655Srie if ((ret = tls_fixups(ofl, arsp)) == FIX_ERROR) 7477c478bd9Sstevel@tonic-gate return (S_ERROR); 7487c478bd9Sstevel@tonic-gate if (ret == FIX_DONE) 7497c478bd9Sstevel@tonic-gate continue; 7507c478bd9Sstevel@tonic-gate } 7517c478bd9Sstevel@tonic-gate 7527c478bd9Sstevel@tonic-gate /* 7537c478bd9Sstevel@tonic-gate * If this is a relocation against a move table, or 7547c478bd9Sstevel@tonic-gate * expanded move table, adjust the relocation entries. 7557c478bd9Sstevel@tonic-gate */ 7567c478bd9Sstevel@tonic-gate if (arsp->rel_move) 7575aefb655Srie ld_adj_movereloc(ofl, arsp); 7587c478bd9Sstevel@tonic-gate 7597c478bd9Sstevel@tonic-gate sdp = arsp->rel_sym; 7607c478bd9Sstevel@tonic-gate refaddr = arsp->rel_roffset + 7617c478bd9Sstevel@tonic-gate (Off)_elf_getxoff(arsp->rel_isdesc->is_indata); 7627c478bd9Sstevel@tonic-gate 7637c478bd9Sstevel@tonic-gate if (arsp->rel_flags & FLG_REL_CLVAL) 7647c478bd9Sstevel@tonic-gate value = 0; 7657c478bd9Sstevel@tonic-gate else if (ELF_ST_TYPE(sdp->sd_sym->st_info) == 7667c478bd9Sstevel@tonic-gate STT_SECTION) { 767141040e8Srie Sym_desc *sym; 7687c478bd9Sstevel@tonic-gate 7697c478bd9Sstevel@tonic-gate /* 7707c478bd9Sstevel@tonic-gate * The value for a symbol pointing to a SECTION 7717c478bd9Sstevel@tonic-gate * is based off of that sections position. 7727c478bd9Sstevel@tonic-gate * 7735aefb655Srie * The second argument of the ld_am_I_partial() 7745aefb655Srie * is the value stored at the target address 7757c478bd9Sstevel@tonic-gate * relocation is going to be applied. 7767c478bd9Sstevel@tonic-gate */ 7777c478bd9Sstevel@tonic-gate if ((sdp->sd_isc->is_flags & FLG_IS_RELUPD) && 7787c478bd9Sstevel@tonic-gate /* LINTED */ 7795aefb655Srie (sym = ld_am_I_partial(arsp, *(Xword *) 780b3fbe5e6Sseizo ((uchar_t *) 781b3fbe5e6Sseizo arsp->rel_isdesc->is_indata->d_buf + 7827c478bd9Sstevel@tonic-gate arsp->rel_roffset)))) { 7837c478bd9Sstevel@tonic-gate /* 7847c478bd9Sstevel@tonic-gate * If the symbol is moved, 7857c478bd9Sstevel@tonic-gate * adjust the value 7867c478bd9Sstevel@tonic-gate */ 7877c478bd9Sstevel@tonic-gate value = sym->sd_sym->st_value; 7887c478bd9Sstevel@tonic-gate moved = 1; 7897c478bd9Sstevel@tonic-gate } else { 790141040e8Srie value = _elf_getxoff( 791141040e8Srie sdp->sd_isc->is_indata); 7927c478bd9Sstevel@tonic-gate if (sdp->sd_isc->is_shdr->sh_flags & 7937c478bd9Sstevel@tonic-gate SHF_ALLOC) 794141040e8Srie value += sdp->sd_isc-> 795141040e8Srie is_osdesc->os_shdr->sh_addr; 7967c478bd9Sstevel@tonic-gate } 7977c478bd9Sstevel@tonic-gate if (sdp->sd_isc->is_shdr->sh_flags & SHF_TLS) 7987c478bd9Sstevel@tonic-gate value -= ofl->ofl_tlsphdr->p_vaddr; 7992926dd2eSrie 8002926dd2eSrie } else if (IS_SIZE(arsp->rel_rtype)) { 8012926dd2eSrie /* 8022926dd2eSrie * Size relocations require the symbols size. 8032926dd2eSrie */ 8042926dd2eSrie value = sdp->sd_sym->st_size; 805141040e8Srie } else { 8067c478bd9Sstevel@tonic-gate /* 8077010c12aSrie * Else the value is the symbols value. 8087c478bd9Sstevel@tonic-gate */ 8097c478bd9Sstevel@tonic-gate value = sdp->sd_sym->st_value; 810141040e8Srie } 8117c478bd9Sstevel@tonic-gate 8127c478bd9Sstevel@tonic-gate /* 8137c478bd9Sstevel@tonic-gate * Relocation against the GLOBAL_OFFSET_TABLE. 8147c478bd9Sstevel@tonic-gate */ 8157c478bd9Sstevel@tonic-gate if (arsp->rel_flags & FLG_REL_GOT) 8167c478bd9Sstevel@tonic-gate arsp->rel_osdesc = ofl->ofl_osgot; 8177c478bd9Sstevel@tonic-gate 8187c478bd9Sstevel@tonic-gate /* 8197c478bd9Sstevel@tonic-gate * If loadable and not producing a relocatable object 8207c478bd9Sstevel@tonic-gate * add the sections virtual address to the reference 8217c478bd9Sstevel@tonic-gate * address. 8227c478bd9Sstevel@tonic-gate */ 8237c478bd9Sstevel@tonic-gate if ((arsp->rel_flags & FLG_REL_LOAD) && 824141040e8Srie ((flags & FLG_OF_RELOBJ) == 0)) 8257c478bd9Sstevel@tonic-gate refaddr += arsp->rel_isdesc->is_osdesc-> 8267c478bd9Sstevel@tonic-gate os_shdr->sh_addr; 8277c478bd9Sstevel@tonic-gate 8287c478bd9Sstevel@tonic-gate /* 8297c478bd9Sstevel@tonic-gate * If this entry has a PLT assigned to it, it's 8307c478bd9Sstevel@tonic-gate * value is actually the address of the PLT (and 8317c478bd9Sstevel@tonic-gate * not the address of the function). 8327c478bd9Sstevel@tonic-gate */ 8337c478bd9Sstevel@tonic-gate if (IS_PLT(arsp->rel_rtype)) { 8347c478bd9Sstevel@tonic-gate if (sdp->sd_aux && sdp->sd_aux->sa_PLTndx) 8355aefb655Srie value = ld_calc_plt_addr(sdp, ofl); 8367c478bd9Sstevel@tonic-gate } 8377c478bd9Sstevel@tonic-gate 838141040e8Srie /* 839141040e8Srie * Determine whether the value needs further adjustment. 840141040e8Srie * Filter through the attributes of the relocation to 841141040e8Srie * determine what adjustment is required. Note, many 842141040e8Srie * of the following cases are only applicable when a 843141040e8Srie * .got is present. As a .got is not generated when a 844141040e8Srie * relocatable object is being built, any adjustments 845141040e8Srie * that require a .got need to be skipped. 846141040e8Srie */ 847141040e8Srie if ((arsp->rel_flags & FLG_REL_GOT) && 848141040e8Srie ((flags & FLG_OF_RELOBJ) == 0)) { 8497c478bd9Sstevel@tonic-gate Xword R1addr; 8507c478bd9Sstevel@tonic-gate uintptr_t R2addr; 8517c478bd9Sstevel@tonic-gate Word gotndx; 8527c478bd9Sstevel@tonic-gate Gotndx *gnp; 8537c478bd9Sstevel@tonic-gate 8547c478bd9Sstevel@tonic-gate /* 8557c478bd9Sstevel@tonic-gate * Perform relocation against GOT table. Since 8567c478bd9Sstevel@tonic-gate * this doesn't fit exactly into a relocation 8577c478bd9Sstevel@tonic-gate * we place the appropriate byte in the GOT 8587c478bd9Sstevel@tonic-gate * directly 8597c478bd9Sstevel@tonic-gate * 8607c478bd9Sstevel@tonic-gate * Calculate offset into GOT at which to apply 8617c478bd9Sstevel@tonic-gate * the relocation. 8627c478bd9Sstevel@tonic-gate */ 8635aefb655Srie gnp = ld_find_gotndx(&(sdp->sd_GOTndxs), gref, 8647c478bd9Sstevel@tonic-gate ofl, 0); 8657c478bd9Sstevel@tonic-gate assert(gnp); 8667c478bd9Sstevel@tonic-gate 8677c478bd9Sstevel@tonic-gate if (arsp->rel_rtype == R_386_TLS_DTPOFF32) 8687c478bd9Sstevel@tonic-gate gotndx = gnp->gn_gotndx + 1; 8697c478bd9Sstevel@tonic-gate else 8707c478bd9Sstevel@tonic-gate gotndx = gnp->gn_gotndx; 8717c478bd9Sstevel@tonic-gate 8727c478bd9Sstevel@tonic-gate R1addr = (Xword)(gotndx * M_GOT_ENTSIZE); 8737c478bd9Sstevel@tonic-gate 8747c478bd9Sstevel@tonic-gate /* 8757c478bd9Sstevel@tonic-gate * Add the GOTs data's offset. 8767c478bd9Sstevel@tonic-gate */ 8777c478bd9Sstevel@tonic-gate R2addr = R1addr + (uintptr_t) 8787c478bd9Sstevel@tonic-gate arsp->rel_osdesc->os_outdata->d_buf; 8797c478bd9Sstevel@tonic-gate 8805aefb655Srie DBG_CALL(Dbg_reloc_doact(ofl->ofl_lml, 8815aefb655Srie ELF_DBG_LD, M_MACH, SHT_REL, 8827c478bd9Sstevel@tonic-gate arsp->rel_rtype, R1addr, value, 8837c478bd9Sstevel@tonic-gate arsp->rel_sname, arsp->rel_osdesc)); 8847c478bd9Sstevel@tonic-gate 8857c478bd9Sstevel@tonic-gate /* 8867c478bd9Sstevel@tonic-gate * And do it. 8877c478bd9Sstevel@tonic-gate */ 888f3324781Sab if (ofl->ofl_flags1 & FLG_OF1_ENCDIFF) 889f3324781Sab *(Xword *)R2addr = 890ba2be530Sab ld_bswap_Xword(value); 891f3324781Sab else 892f3324781Sab *(Xword *)R2addr = value; 8937c478bd9Sstevel@tonic-gate continue; 8947c478bd9Sstevel@tonic-gate 895141040e8Srie } else if (IS_GOT_BASED(arsp->rel_rtype) && 896141040e8Srie ((flags & FLG_OF_RELOBJ) == 0)) { 8977c478bd9Sstevel@tonic-gate value -= ofl->ofl_osgot->os_shdr->sh_addr; 898141040e8Srie 899141040e8Srie } else if (IS_GOT_PC(arsp->rel_rtype) && 900141040e8Srie ((flags & FLG_OF_RELOBJ) == 0)) { 901141040e8Srie value = 902141040e8Srie (Xword)(ofl->ofl_osgot->os_shdr->sh_addr) - 903141040e8Srie refaddr; 904141040e8Srie 9057c478bd9Sstevel@tonic-gate } else if ((IS_PC_RELATIVE(arsp->rel_rtype)) && 906141040e8Srie (((flags & FLG_OF_RELOBJ) == 0) || 9077c478bd9Sstevel@tonic-gate (arsp->rel_osdesc == sdp->sd_isc->is_osdesc))) { 9087c478bd9Sstevel@tonic-gate value -= refaddr; 909141040e8Srie 9107c478bd9Sstevel@tonic-gate } else if (IS_TLS_INS(arsp->rel_rtype) && 911141040e8Srie IS_GOT_RELATIVE(arsp->rel_rtype) && 912141040e8Srie ((flags & FLG_OF_RELOBJ) == 0)) { 9137c478bd9Sstevel@tonic-gate Gotndx *gnp; 9147c478bd9Sstevel@tonic-gate 9155aefb655Srie gnp = ld_find_gotndx(&(sdp->sd_GOTndxs), gref, 9167c478bd9Sstevel@tonic-gate ofl, 0); 9177c478bd9Sstevel@tonic-gate assert(gnp); 918141040e8Srie value = (Xword)gnp->gn_gotndx * M_GOT_ENTSIZE; 9197c478bd9Sstevel@tonic-gate if (arsp->rel_rtype == R_386_TLS_IE) { 920141040e8Srie value += 921141040e8Srie ofl->ofl_osgot->os_shdr->sh_addr; 9227c478bd9Sstevel@tonic-gate } 923141040e8Srie 924141040e8Srie } else if (IS_GOT_RELATIVE(arsp->rel_rtype) && 925141040e8Srie ((flags & FLG_OF_RELOBJ) == 0)) { 926141040e8Srie Gotndx *gnp; 9277c478bd9Sstevel@tonic-gate 9285aefb655Srie gnp = ld_find_gotndx(&(sdp->sd_GOTndxs), 9297c478bd9Sstevel@tonic-gate GOT_REF_GENERIC, ofl, 0); 9307c478bd9Sstevel@tonic-gate assert(gnp); 931141040e8Srie value = (Xword)gnp->gn_gotndx * M_GOT_ENTSIZE; 932141040e8Srie 933141040e8Srie } else if ((arsp->rel_flags & FLG_REL_STLS) && 934141040e8Srie ((flags & FLG_OF_RELOBJ) == 0)) { 9357c478bd9Sstevel@tonic-gate Xword tlsstatsize; 936141040e8Srie 9377c478bd9Sstevel@tonic-gate /* 9387c478bd9Sstevel@tonic-gate * This is the LE TLS reference model. Static 9397c478bd9Sstevel@tonic-gate * offset is hard-coded. 9407c478bd9Sstevel@tonic-gate */ 941141040e8Srie tlsstatsize = 942141040e8Srie S_ROUND(ofl->ofl_tlsphdr->p_memsz, 9437c478bd9Sstevel@tonic-gate M_TLSSTATALIGN); 9447c478bd9Sstevel@tonic-gate value = tlsstatsize - value; 945141040e8Srie 9467c478bd9Sstevel@tonic-gate /* 947141040e8Srie * Since this code is fixed up, it assumes a 948141040e8Srie * negative offset that can be added to the 949141040e8Srie * thread pointer. 9507c478bd9Sstevel@tonic-gate */ 9517c478bd9Sstevel@tonic-gate if ((arsp->rel_rtype == R_386_TLS_LDO_32) || 9527c478bd9Sstevel@tonic-gate (arsp->rel_rtype == R_386_TLS_LE)) 9537c478bd9Sstevel@tonic-gate value = -value; 9547c478bd9Sstevel@tonic-gate } 9557c478bd9Sstevel@tonic-gate 9567c478bd9Sstevel@tonic-gate if (arsp->rel_isdesc->is_file) 9577c478bd9Sstevel@tonic-gate ifl_name = arsp->rel_isdesc->is_file->ifl_name; 9587c478bd9Sstevel@tonic-gate else 9597c478bd9Sstevel@tonic-gate ifl_name = MSG_INTL(MSG_STR_NULL); 9607c478bd9Sstevel@tonic-gate 9617c478bd9Sstevel@tonic-gate /* 9627c478bd9Sstevel@tonic-gate * Make sure we have data to relocate. Compiler and 9637c478bd9Sstevel@tonic-gate * assembler developers have been known to generate 9647c478bd9Sstevel@tonic-gate * relocations against invalid sections (normally .bss), 9657c478bd9Sstevel@tonic-gate * so for their benefit give them sufficient information 9667c478bd9Sstevel@tonic-gate * to help analyze the problem. End users should never 9677c478bd9Sstevel@tonic-gate * see this. 9687c478bd9Sstevel@tonic-gate */ 9697c478bd9Sstevel@tonic-gate if (arsp->rel_isdesc->is_indata->d_buf == 0) { 970de777a60Sab Conv_inv_buf_t inv_buf; 971de777a60Sab 9725aefb655Srie eprintf(ofl->ofl_lml, ERR_FATAL, 9735aefb655Srie MSG_INTL(MSG_REL_EMPTYSEC), 974de777a60Sab conv_reloc_386_type(arsp->rel_rtype, 975de777a60Sab 0, &inv_buf), 9767c478bd9Sstevel@tonic-gate ifl_name, demangle(arsp->rel_sname), 9777c478bd9Sstevel@tonic-gate arsp->rel_isdesc->is_name); 9787c478bd9Sstevel@tonic-gate return (S_ERROR); 9797c478bd9Sstevel@tonic-gate } 9807c478bd9Sstevel@tonic-gate 9817c478bd9Sstevel@tonic-gate /* 9827c478bd9Sstevel@tonic-gate * Get the address of the data item we need to modify. 9837c478bd9Sstevel@tonic-gate */ 984b3fbe5e6Sseizo addr = (uchar_t *)((uintptr_t)arsp->rel_roffset + 985b3fbe5e6Sseizo (uintptr_t)_elf_getxoff(arsp->rel_isdesc-> 986b3fbe5e6Sseizo is_indata)); 9877c478bd9Sstevel@tonic-gate 9885aefb655Srie DBG_CALL(Dbg_reloc_doact(ofl->ofl_lml, ELF_DBG_LD, 9895aefb655Srie M_MACH, SHT_REL, arsp->rel_rtype, EC_NATPTR(addr), 9905aefb655Srie value, arsp->rel_sname, arsp->rel_osdesc)); 9917c478bd9Sstevel@tonic-gate addr += (uintptr_t)arsp->rel_osdesc->os_outdata->d_buf; 9927c478bd9Sstevel@tonic-gate 9935aefb655Srie if ((((uintptr_t)addr - (uintptr_t)ofl->ofl_nehdr) > 994b3fbe5e6Sseizo ofl->ofl_size) || (arsp->rel_roffset > 9957c478bd9Sstevel@tonic-gate arsp->rel_osdesc->os_shdr->sh_size)) { 996de777a60Sab Conv_inv_buf_t inv_buf; 997de777a60Sab int class; 9987c478bd9Sstevel@tonic-gate 9997c478bd9Sstevel@tonic-gate if (((uintptr_t)addr - 10005aefb655Srie (uintptr_t)ofl->ofl_nehdr) > ofl->ofl_size) 10017c478bd9Sstevel@tonic-gate class = ERR_FATAL; 10027c478bd9Sstevel@tonic-gate else 10037c478bd9Sstevel@tonic-gate class = ERR_WARNING; 10047c478bd9Sstevel@tonic-gate 10055aefb655Srie eprintf(ofl->ofl_lml, class, 10065aefb655Srie MSG_INTL(MSG_REL_INVALOFFSET), 1007de777a60Sab conv_reloc_386_type(arsp->rel_rtype, 1008de777a60Sab 0, &inv_buf), 10097c478bd9Sstevel@tonic-gate ifl_name, arsp->rel_isdesc->is_name, 10107c478bd9Sstevel@tonic-gate demangle(arsp->rel_sname), 10117c478bd9Sstevel@tonic-gate EC_ADDR((uintptr_t)addr - 10125aefb655Srie (uintptr_t)ofl->ofl_nehdr)); 10137c478bd9Sstevel@tonic-gate 10147c478bd9Sstevel@tonic-gate if (class == ERR_FATAL) { 10157c478bd9Sstevel@tonic-gate return_code = S_ERROR; 10167c478bd9Sstevel@tonic-gate continue; 10177c478bd9Sstevel@tonic-gate } 10187c478bd9Sstevel@tonic-gate } 10197c478bd9Sstevel@tonic-gate 10207c478bd9Sstevel@tonic-gate /* 10217c478bd9Sstevel@tonic-gate * The relocation is additive. Ignore the previous 10227c478bd9Sstevel@tonic-gate * symbol value if this local partial symbol is 10237c478bd9Sstevel@tonic-gate * expanded. 10247c478bd9Sstevel@tonic-gate */ 10257c478bd9Sstevel@tonic-gate if (moved) 10267c478bd9Sstevel@tonic-gate value -= *addr; 10277c478bd9Sstevel@tonic-gate 1028cce0e03bSab /* 1029cce0e03bSab * If we have a replacement value for the relocation 1030cce0e03bSab * target, put it in place now. 1031cce0e03bSab */ 1032cce0e03bSab if (arsp->rel_flags & FLG_REL_NADDEND) { 1033cce0e03bSab Xword addend = arsp->rel_raddend; 1034cce0e03bSab 1035cce0e03bSab if (ld_reloc_targval_set(ofl, arsp, 1036cce0e03bSab addr, addend) == 0) 1037cce0e03bSab return (S_ERROR); 1038cce0e03bSab } 1039cce0e03bSab 10407c478bd9Sstevel@tonic-gate /* 1041f3324781Sab * If '-z noreloc' is specified - skip the do_reloc_ld 10427c478bd9Sstevel@tonic-gate * stage. 10437c478bd9Sstevel@tonic-gate */ 1044f3324781Sab if (OFL_DO_RELOC(ofl)) { 1045f3324781Sab if (do_reloc_ld((uchar_t)arsp->rel_rtype, addr, 10465aefb655Srie &value, arsp->rel_sname, ifl_name, 1047f3324781Sab OFL_SWAP_RELOC_DATA(ofl, arsp), 10485aefb655Srie ofl->ofl_lml) == 0) 10497c478bd9Sstevel@tonic-gate return_code = S_ERROR; 10507c478bd9Sstevel@tonic-gate } 10517c478bd9Sstevel@tonic-gate } 10527c478bd9Sstevel@tonic-gate } 10537c478bd9Sstevel@tonic-gate return (return_code); 10547c478bd9Sstevel@tonic-gate } 10557c478bd9Sstevel@tonic-gate 1056141040e8Srie /* 1057141040e8Srie * Add an output relocation record. 1058141040e8Srie */ 1059ba2be530Sab static uintptr_t 10605aefb655Srie ld_add_outrel(Word flags, Rel_desc *rsp, Ofl_desc *ofl) 10617c478bd9Sstevel@tonic-gate { 1062141040e8Srie Rel_desc *orsp; 1063141040e8Srie Rel_cache *rcp; 1064141040e8Srie Sym_desc *sdp = rsp->rel_sym; 10657c478bd9Sstevel@tonic-gate 10667c478bd9Sstevel@tonic-gate /* 10677c478bd9Sstevel@tonic-gate * Static executables *do not* want any relocations against them. 10687c478bd9Sstevel@tonic-gate * Since our engine still creates relocations against a WEAK UNDEFINED 10697c478bd9Sstevel@tonic-gate * symbol in a static executable, it's best to disable them here 10707c478bd9Sstevel@tonic-gate * instead of through out the relocation code. 10717c478bd9Sstevel@tonic-gate */ 10727c478bd9Sstevel@tonic-gate if ((ofl->ofl_flags & (FLG_OF_STATIC | FLG_OF_EXEC)) == 10737c478bd9Sstevel@tonic-gate (FLG_OF_STATIC | FLG_OF_EXEC)) 10747c478bd9Sstevel@tonic-gate return (1); 10757c478bd9Sstevel@tonic-gate 10767c478bd9Sstevel@tonic-gate /* 10777c478bd9Sstevel@tonic-gate * If no relocation cache structures are available allocate 10787c478bd9Sstevel@tonic-gate * a new one and link it into the cache list. 10797c478bd9Sstevel@tonic-gate */ 10807c478bd9Sstevel@tonic-gate if ((ofl->ofl_outrels.tail == 0) || 10817c478bd9Sstevel@tonic-gate ((rcp = (Rel_cache *)ofl->ofl_outrels.tail->data) == 0) || 10827c478bd9Sstevel@tonic-gate ((orsp = rcp->rc_free) == rcp->rc_end)) { 10837c478bd9Sstevel@tonic-gate static size_t nextsize = 0; 10847c478bd9Sstevel@tonic-gate size_t size; 10857c478bd9Sstevel@tonic-gate 10867c478bd9Sstevel@tonic-gate /* 10877c478bd9Sstevel@tonic-gate * Output relocation numbers can vary considerably between 10887c478bd9Sstevel@tonic-gate * building executables or shared objects (pic vs. non-pic), 10897c478bd9Sstevel@tonic-gate * etc. But, they typically aren't very large, so for these 10907c478bd9Sstevel@tonic-gate * objects use a standard bucket size. For building relocatable 10917c478bd9Sstevel@tonic-gate * objects, typically there will be an output relocation for 10927c478bd9Sstevel@tonic-gate * every input relocation. 10937c478bd9Sstevel@tonic-gate */ 10947c478bd9Sstevel@tonic-gate if (nextsize == 0) { 10957c478bd9Sstevel@tonic-gate if (ofl->ofl_flags & FLG_OF_RELOBJ) { 10967c478bd9Sstevel@tonic-gate if ((size = ofl->ofl_relocincnt) == 0) 10977c478bd9Sstevel@tonic-gate size = REL_LOIDESCNO; 10987c478bd9Sstevel@tonic-gate if (size > REL_HOIDESCNO) 10997c478bd9Sstevel@tonic-gate nextsize = REL_HOIDESCNO; 11007c478bd9Sstevel@tonic-gate else 11017c478bd9Sstevel@tonic-gate nextsize = REL_LOIDESCNO; 11027c478bd9Sstevel@tonic-gate } else 11037c478bd9Sstevel@tonic-gate nextsize = size = REL_HOIDESCNO; 11047c478bd9Sstevel@tonic-gate } else 11057c478bd9Sstevel@tonic-gate size = nextsize; 11067c478bd9Sstevel@tonic-gate 11077c478bd9Sstevel@tonic-gate size = size * sizeof (Rel_desc); 11087c478bd9Sstevel@tonic-gate 11097c478bd9Sstevel@tonic-gate if (((rcp = libld_malloc(sizeof (Rel_cache) + size)) == 0) || 11107c478bd9Sstevel@tonic-gate (list_appendc(&ofl->ofl_outrels, rcp) == 0)) 11117c478bd9Sstevel@tonic-gate return (S_ERROR); 11127c478bd9Sstevel@tonic-gate 11137c478bd9Sstevel@tonic-gate /* LINTED */ 11147c478bd9Sstevel@tonic-gate rcp->rc_free = orsp = (Rel_desc *)(rcp + 1); 11157c478bd9Sstevel@tonic-gate /* LINTED */ 11167c478bd9Sstevel@tonic-gate rcp->rc_end = (Rel_desc *)((char *)rcp->rc_free + size); 11177c478bd9Sstevel@tonic-gate } 11187c478bd9Sstevel@tonic-gate 11197c478bd9Sstevel@tonic-gate /* 11207c478bd9Sstevel@tonic-gate * If we are adding a output relocation against a section 11217c478bd9Sstevel@tonic-gate * symbol (non-RELATIVE) then mark that section. These sections 11227c478bd9Sstevel@tonic-gate * will be added to the .dynsym symbol table. 11237c478bd9Sstevel@tonic-gate */ 11247c478bd9Sstevel@tonic-gate if (sdp && (rsp->rel_rtype != M_R_RELATIVE) && 11257c478bd9Sstevel@tonic-gate ((flags & FLG_REL_SCNNDX) || 11267c478bd9Sstevel@tonic-gate (ELF_ST_TYPE(sdp->sd_sym->st_info) == STT_SECTION))) { 11277c478bd9Sstevel@tonic-gate 11287c478bd9Sstevel@tonic-gate /* 11297c478bd9Sstevel@tonic-gate * If this is a COMMON symbol - no output section 11307c478bd9Sstevel@tonic-gate * exists yet - (it's created as part of sym_validate()). 11317c478bd9Sstevel@tonic-gate * So - we mark here that when it's created it should 11327c478bd9Sstevel@tonic-gate * be tagged with the FLG_OS_OUTREL flag. 11337c478bd9Sstevel@tonic-gate */ 11347c478bd9Sstevel@tonic-gate if ((sdp->sd_flags & FLG_SY_SPECSEC) && 11350bc07c75Srie (sdp->sd_sym->st_shndx == SHN_COMMON)) { 11367c478bd9Sstevel@tonic-gate if (ELF_ST_TYPE(sdp->sd_sym->st_info) != STT_TLS) 11377c478bd9Sstevel@tonic-gate ofl->ofl_flags1 |= FLG_OF1_BSSOREL; 11387c478bd9Sstevel@tonic-gate else 11397c478bd9Sstevel@tonic-gate ofl->ofl_flags1 |= FLG_OF1_TLSOREL; 1140141040e8Srie } else { 1141141040e8Srie Os_desc *osp = sdp->sd_isc->is_osdesc; 11427c478bd9Sstevel@tonic-gate 1143c1c6f601Srie if (osp && ((osp->os_flags & FLG_OS_OUTREL) == 0)) { 11447c478bd9Sstevel@tonic-gate ofl->ofl_dynshdrcnt++; 11457c478bd9Sstevel@tonic-gate osp->os_flags |= FLG_OS_OUTREL; 11467c478bd9Sstevel@tonic-gate } 11477c478bd9Sstevel@tonic-gate } 11487c478bd9Sstevel@tonic-gate } 11497c478bd9Sstevel@tonic-gate 11507c478bd9Sstevel@tonic-gate *orsp = *rsp; 11517c478bd9Sstevel@tonic-gate orsp->rel_flags |= flags; 11527c478bd9Sstevel@tonic-gate 11537c478bd9Sstevel@tonic-gate rcp->rc_free++; 11547c478bd9Sstevel@tonic-gate ofl->ofl_outrelscnt++; 11557c478bd9Sstevel@tonic-gate 11567c478bd9Sstevel@tonic-gate if (flags & FLG_REL_GOT) 11577c478bd9Sstevel@tonic-gate ofl->ofl_relocgotsz += (Xword)sizeof (Rel); 11587c478bd9Sstevel@tonic-gate else if (flags & FLG_REL_PLT) 11597c478bd9Sstevel@tonic-gate ofl->ofl_relocpltsz += (Xword)sizeof (Rel); 11607c478bd9Sstevel@tonic-gate else if (flags & FLG_REL_BSS) 11617c478bd9Sstevel@tonic-gate ofl->ofl_relocbsssz += (Xword)sizeof (Rel); 11627c478bd9Sstevel@tonic-gate else if (flags & FLG_REL_NOINFO) 11637c478bd9Sstevel@tonic-gate ofl->ofl_relocrelsz += (Xword)sizeof (Rel); 11647c478bd9Sstevel@tonic-gate else 11657c478bd9Sstevel@tonic-gate orsp->rel_osdesc->os_szoutrels += (Xword)sizeof (Rel); 11667c478bd9Sstevel@tonic-gate 11677c478bd9Sstevel@tonic-gate if (orsp->rel_rtype == M_R_RELATIVE) 11687c478bd9Sstevel@tonic-gate ofl->ofl_relocrelcnt++; 11697c478bd9Sstevel@tonic-gate 11707c478bd9Sstevel@tonic-gate /* 11717c478bd9Sstevel@tonic-gate * We don't perform sorting on PLT relocations because 11727c478bd9Sstevel@tonic-gate * they have already been assigned a PLT index and if we 11737c478bd9Sstevel@tonic-gate * were to sort them we would have to re-assign the plt indexes. 11747c478bd9Sstevel@tonic-gate */ 11757c478bd9Sstevel@tonic-gate if (!(flags & FLG_REL_PLT)) 11767c478bd9Sstevel@tonic-gate ofl->ofl_reloccnt++; 11777c478bd9Sstevel@tonic-gate 11787c478bd9Sstevel@tonic-gate /* 1179141040e8Srie * Insure a GLOBAL_OFFSET_TABLE is generated if required. 11807c478bd9Sstevel@tonic-gate */ 1181141040e8Srie if (IS_GOT_REQUIRED(orsp->rel_rtype)) 11827c478bd9Sstevel@tonic-gate ofl->ofl_flags |= FLG_OF_BLDGOT; 11837c478bd9Sstevel@tonic-gate 11847c478bd9Sstevel@tonic-gate /* 11857c478bd9Sstevel@tonic-gate * Identify and possibly warn of a displacement relocation. 11867c478bd9Sstevel@tonic-gate */ 11877c478bd9Sstevel@tonic-gate if (orsp->rel_flags & FLG_REL_DISP) { 11887c478bd9Sstevel@tonic-gate ofl->ofl_dtflags_1 |= DF_1_DISPRELPND; 11897c478bd9Sstevel@tonic-gate 11907c478bd9Sstevel@tonic-gate if (ofl->ofl_flags & FLG_OF_VERBOSE) 11915aefb655Srie ld_disp_errmsg(MSG_INTL(MSG_REL_DISPREL4), orsp, ofl); 11927c478bd9Sstevel@tonic-gate } 11935aefb655Srie DBG_CALL(Dbg_reloc_ors_entry(ofl->ofl_lml, ELF_DBG_LD, SHT_REL, 11945aefb655Srie M_MACH, orsp)); 11957c478bd9Sstevel@tonic-gate return (1); 11967c478bd9Sstevel@tonic-gate } 11977c478bd9Sstevel@tonic-gate 11987c478bd9Sstevel@tonic-gate /* 11997c478bd9Sstevel@tonic-gate * process relocation for a LOCAL symbol 12007c478bd9Sstevel@tonic-gate */ 1201ba2be530Sab static uintptr_t 12025aefb655Srie ld_reloc_local(Rel_desc * rsp, Ofl_desc * ofl) 12037c478bd9Sstevel@tonic-gate { 12041d9df23bSab ofl_flag_t flags = ofl->ofl_flags; 12057c478bd9Sstevel@tonic-gate Sym_desc *sdp = rsp->rel_sym; 12060bc07c75Srie Word shndx = sdp->sd_sym->st_shndx; 12077c478bd9Sstevel@tonic-gate 12087c478bd9Sstevel@tonic-gate /* 12097c478bd9Sstevel@tonic-gate * if ((shared object) and (not pc relative relocation) and 12107c478bd9Sstevel@tonic-gate * (not against ABS symbol)) 12117c478bd9Sstevel@tonic-gate * then 12127c478bd9Sstevel@tonic-gate * build R_386_RELATIVE 12137c478bd9Sstevel@tonic-gate * fi 12147c478bd9Sstevel@tonic-gate */ 12157c478bd9Sstevel@tonic-gate if ((flags & FLG_OF_SHAROBJ) && (rsp->rel_flags & FLG_REL_LOAD) && 12162926dd2eSrie !(IS_PC_RELATIVE(rsp->rel_rtype)) && !(IS_SIZE(rsp->rel_rtype)) && 12177c478bd9Sstevel@tonic-gate !(IS_GOT_BASED(rsp->rel_rtype)) && 12187c478bd9Sstevel@tonic-gate !(rsp->rel_isdesc != NULL && 12197c478bd9Sstevel@tonic-gate (rsp->rel_isdesc->is_shdr->sh_type == SHT_SUNW_dof)) && 12207c478bd9Sstevel@tonic-gate (((sdp->sd_flags & FLG_SY_SPECSEC) == 0) || 12217c478bd9Sstevel@tonic-gate (shndx != SHN_ABS) || (sdp->sd_aux && sdp->sd_aux->sa_symspec))) { 12227c478bd9Sstevel@tonic-gate Word ortype = rsp->rel_rtype; 12237c478bd9Sstevel@tonic-gate 12247c478bd9Sstevel@tonic-gate rsp->rel_rtype = R_386_RELATIVE; 12255aefb655Srie if (ld_add_outrel(NULL, rsp, ofl) == S_ERROR) 12267c478bd9Sstevel@tonic-gate return (S_ERROR); 12277c478bd9Sstevel@tonic-gate rsp->rel_rtype = ortype; 12287c478bd9Sstevel@tonic-gate } 12297c478bd9Sstevel@tonic-gate 12307c478bd9Sstevel@tonic-gate /* 12317c478bd9Sstevel@tonic-gate * If the relocation is against a 'non-allocatable' section 12327c478bd9Sstevel@tonic-gate * and we can not resolve it now - then give a warning 12337c478bd9Sstevel@tonic-gate * message. 12347c478bd9Sstevel@tonic-gate * 12357c478bd9Sstevel@tonic-gate * We can not resolve the symbol if either: 12367c478bd9Sstevel@tonic-gate * a) it's undefined 12377c478bd9Sstevel@tonic-gate * b) it's defined in a shared library and a 12387c478bd9Sstevel@tonic-gate * COPY relocation hasn't moved it to the executable 12397c478bd9Sstevel@tonic-gate * 12407c478bd9Sstevel@tonic-gate * Note: because we process all of the relocations against the 12417c478bd9Sstevel@tonic-gate * text segment before any others - we know whether 12427c478bd9Sstevel@tonic-gate * or not a copy relocation will be generated before 12437c478bd9Sstevel@tonic-gate * we get here (see reloc_init()->reloc_segments()). 12447c478bd9Sstevel@tonic-gate */ 12457c478bd9Sstevel@tonic-gate if (!(rsp->rel_flags & FLG_REL_LOAD) && 12467c478bd9Sstevel@tonic-gate ((shndx == SHN_UNDEF) || 12477c478bd9Sstevel@tonic-gate ((sdp->sd_ref == REF_DYN_NEED) && 12487c478bd9Sstevel@tonic-gate ((sdp->sd_flags & FLG_SY_MVTOCOMM) == 0)))) { 1249de777a60Sab Conv_inv_buf_t inv_buf; 1250de777a60Sab 12517c478bd9Sstevel@tonic-gate /* 12527c478bd9Sstevel@tonic-gate * If the relocation is against a SHT_SUNW_ANNOTATE 12537c478bd9Sstevel@tonic-gate * section - then silently ignore that the relocation 12547c478bd9Sstevel@tonic-gate * can not be resolved. 12557c478bd9Sstevel@tonic-gate */ 12567c478bd9Sstevel@tonic-gate if (rsp->rel_osdesc && 12577c478bd9Sstevel@tonic-gate (rsp->rel_osdesc->os_shdr->sh_type == SHT_SUNW_ANNOTATE)) 12587c478bd9Sstevel@tonic-gate return (0); 12595aefb655Srie eprintf(ofl->ofl_lml, ERR_WARNING, MSG_INTL(MSG_REL_EXTERNSYM), 1260de777a60Sab conv_reloc_386_type(rsp->rel_rtype, 0, &inv_buf), 12617c478bd9Sstevel@tonic-gate rsp->rel_isdesc->is_file->ifl_name, 12627c478bd9Sstevel@tonic-gate demangle(rsp->rel_sname), rsp->rel_osdesc->os_name); 12637c478bd9Sstevel@tonic-gate return (1); 12647c478bd9Sstevel@tonic-gate } 12657c478bd9Sstevel@tonic-gate 12667c478bd9Sstevel@tonic-gate /* 12677c478bd9Sstevel@tonic-gate * Perform relocation. 12687c478bd9Sstevel@tonic-gate */ 12695aefb655Srie return (ld_add_actrel(NULL, rsp, ofl)); 12707c478bd9Sstevel@tonic-gate } 12717c478bd9Sstevel@tonic-gate 1272ba2be530Sab static uintptr_t 12735aefb655Srie ld_reloc_TLS(Boolean local, Rel_desc * rsp, Ofl_desc * ofl) 12747c478bd9Sstevel@tonic-gate { 12757c478bd9Sstevel@tonic-gate Word rtype = rsp->rel_rtype; 12767c478bd9Sstevel@tonic-gate Sym_desc *sdp = rsp->rel_sym; 12771d9df23bSab ofl_flag_t flags = ofl->ofl_flags; 12787c478bd9Sstevel@tonic-gate Gotndx *gnp; 12797c478bd9Sstevel@tonic-gate 12807c478bd9Sstevel@tonic-gate /* 1281d326b23bSrie * If we're building an executable - use either the IE or LE access 1282d326b23bSrie * model. If we're building a shared object process any IE model. 12837c478bd9Sstevel@tonic-gate */ 1284d326b23bSrie if ((flags & FLG_OF_EXEC) || (IS_TLS_IE(rtype))) { 12857c478bd9Sstevel@tonic-gate /* 1286d326b23bSrie * Set the DF_STATIC_TLS flag. 12877c478bd9Sstevel@tonic-gate */ 12887c478bd9Sstevel@tonic-gate ofl->ofl_dtflags |= DF_STATIC_TLS; 12897c478bd9Sstevel@tonic-gate 1290d326b23bSrie if (!local || ((flags & FLG_OF_EXEC) == 0)) { 12917c478bd9Sstevel@tonic-gate /* 1292d326b23bSrie * Assign a GOT entry for static TLS references. 12937c478bd9Sstevel@tonic-gate */ 1294d326b23bSrie if ((gnp = ld_find_gotndx(&(sdp->sd_GOTndxs), 1295d326b23bSrie GOT_REF_TLSIE, ofl, 0)) == 0) { 12967c478bd9Sstevel@tonic-gate 1297d326b23bSrie if (ld_assign_got_TLS(local, rsp, ofl, sdp, 1298d326b23bSrie gnp, GOT_REF_TLSIE, FLG_REL_STLS, 1299d326b23bSrie rtype, R_386_TLS_TPOFF, 0) == S_ERROR) 1300d326b23bSrie return (S_ERROR); 1301d326b23bSrie } 13027c478bd9Sstevel@tonic-gate 13037c478bd9Sstevel@tonic-gate /* 1304d326b23bSrie * IE access model. 13057c478bd9Sstevel@tonic-gate */ 1306d326b23bSrie if (IS_TLS_IE(rtype)) { 1307d326b23bSrie if (ld_add_actrel(FLG_REL_STLS, 13087c478bd9Sstevel@tonic-gate rsp, ofl) == S_ERROR) 13097c478bd9Sstevel@tonic-gate return (S_ERROR); 1310d326b23bSrie 1311d326b23bSrie /* 1312d326b23bSrie * A non-pic shared object needs to adjust the 1313d326b23bSrie * active relocation (indntpoff). 1314d326b23bSrie */ 1315d326b23bSrie if (((flags & FLG_OF_EXEC) == 0) && 1316d326b23bSrie (rtype == R_386_TLS_IE)) { 1317d326b23bSrie rsp->rel_rtype = R_386_RELATIVE; 1318d326b23bSrie return (ld_add_outrel(NULL, rsp, ofl)); 1319d326b23bSrie } 1320d326b23bSrie return (1); 13217c478bd9Sstevel@tonic-gate } 13227c478bd9Sstevel@tonic-gate 13237c478bd9Sstevel@tonic-gate /* 1324d326b23bSrie * Fixups are required for other executable models. 13257c478bd9Sstevel@tonic-gate */ 13265aefb655Srie return (ld_add_actrel((FLG_REL_TLSFIX | FLG_REL_STLS), 13277c478bd9Sstevel@tonic-gate rsp, ofl)); 13287c478bd9Sstevel@tonic-gate } 1329d326b23bSrie 13307c478bd9Sstevel@tonic-gate /* 1331d326b23bSrie * LE access model. 13327c478bd9Sstevel@tonic-gate */ 13337c478bd9Sstevel@tonic-gate if (IS_TLS_LE(rtype) || (rtype == R_386_TLS_LDO_32)) 13345aefb655Srie return (ld_add_actrel(FLG_REL_STLS, rsp, ofl)); 13357c478bd9Sstevel@tonic-gate 13365aefb655Srie return (ld_add_actrel((FLG_REL_TLSFIX | FLG_REL_STLS), 13375aefb655Srie rsp, ofl)); 13387c478bd9Sstevel@tonic-gate } 13397c478bd9Sstevel@tonic-gate 13407c478bd9Sstevel@tonic-gate /* 1341d326b23bSrie * Building a shared object. 1342d326b23bSrie * 1343d326b23bSrie * Assign a GOT entry for a dynamic TLS reference. 13447c478bd9Sstevel@tonic-gate */ 13455aefb655Srie if (IS_TLS_LD(rtype) && ((gnp = ld_find_gotndx(&(sdp->sd_GOTndxs), 13467c478bd9Sstevel@tonic-gate GOT_REF_TLSLD, ofl, 0)) == 0)) { 1347d326b23bSrie 1348d326b23bSrie if (ld_assign_got_TLS(local, rsp, ofl, sdp, gnp, GOT_REF_TLSLD, 1349d326b23bSrie FLG_REL_MTLS, rtype, R_386_TLS_DTPMOD32, 0) == S_ERROR) 13507c478bd9Sstevel@tonic-gate return (S_ERROR); 1351d326b23bSrie 13525aefb655Srie } else if (IS_TLS_GD(rtype) && 13535aefb655Srie ((gnp = ld_find_gotndx(&(sdp->sd_GOTndxs), GOT_REF_TLSGD, 13545aefb655Srie ofl, 0)) == 0)) { 1355d326b23bSrie 1356d326b23bSrie if (ld_assign_got_TLS(local, rsp, ofl, sdp, gnp, GOT_REF_TLSGD, 1357d326b23bSrie FLG_REL_DTLS, rtype, R_386_TLS_DTPMOD32, 1358d326b23bSrie R_386_TLS_DTPOFF32) == S_ERROR) 13597c478bd9Sstevel@tonic-gate return (S_ERROR); 13607c478bd9Sstevel@tonic-gate } 1361d326b23bSrie 13627c478bd9Sstevel@tonic-gate /* 13637c478bd9Sstevel@tonic-gate * For GD/LD TLS reference - TLS_{GD,LD}_CALL, this will eventually 1364d326b23bSrie * cause a call to __tls_get_addr(). Convert this relocation to that 1365d326b23bSrie * symbol now, and prepare for the PLT magic. 13667c478bd9Sstevel@tonic-gate */ 13677c478bd9Sstevel@tonic-gate if ((rtype == R_386_TLS_GD_PLT) || (rtype == R_386_TLS_LDM_PLT)) { 1368f5a18a30Srie Sym_desc *tlsgetsym; 13697c478bd9Sstevel@tonic-gate 13705aefb655Srie if ((tlsgetsym = ld_sym_add_u(MSG_ORIG(MSG_SYM_TLSGETADDR_UU), 1371f5a18a30Srie ofl, MSG_STR_TLSREL)) == (Sym_desc *)S_ERROR) 13727c478bd9Sstevel@tonic-gate return (S_ERROR); 1373d326b23bSrie 13747c478bd9Sstevel@tonic-gate rsp->rel_sym = tlsgetsym; 13757c478bd9Sstevel@tonic-gate rsp->rel_sname = tlsgetsym->sd_name; 13767c478bd9Sstevel@tonic-gate rsp->rel_rtype = R_386_PLT32; 1377d326b23bSrie 13785aefb655Srie if (ld_reloc_plt(rsp, ofl) == S_ERROR) 13797c478bd9Sstevel@tonic-gate return (S_ERROR); 1380d326b23bSrie 13817c478bd9Sstevel@tonic-gate rsp->rel_sym = sdp; 13827c478bd9Sstevel@tonic-gate rsp->rel_sname = sdp->sd_name; 13837c478bd9Sstevel@tonic-gate rsp->rel_rtype = rtype; 13847c478bd9Sstevel@tonic-gate return (1); 13857c478bd9Sstevel@tonic-gate } 13867c478bd9Sstevel@tonic-gate 13877c478bd9Sstevel@tonic-gate if (IS_TLS_LD(rtype)) 13885aefb655Srie return (ld_add_actrel(FLG_REL_MTLS, rsp, ofl)); 13897c478bd9Sstevel@tonic-gate 13905aefb655Srie return (ld_add_actrel(FLG_REL_DTLS, rsp, ofl)); 13917c478bd9Sstevel@tonic-gate } 13927c478bd9Sstevel@tonic-gate 13937c478bd9Sstevel@tonic-gate /* ARGSUSED3 */ 1394ba2be530Sab static Gotndx * 13955aefb655Srie ld_find_gotndx(List * lst, Gotref gref, Ofl_desc * ofl, Rel_desc * rdesc) 13967c478bd9Sstevel@tonic-gate { 13977c478bd9Sstevel@tonic-gate Listnode * lnp; 13987c478bd9Sstevel@tonic-gate Gotndx * gnp; 13997c478bd9Sstevel@tonic-gate 14007c478bd9Sstevel@tonic-gate if ((gref == GOT_REF_TLSLD) && ofl->ofl_tlsldgotndx) 14017c478bd9Sstevel@tonic-gate return (ofl->ofl_tlsldgotndx); 14027c478bd9Sstevel@tonic-gate 14037c478bd9Sstevel@tonic-gate for (LIST_TRAVERSE(lst, lnp, gnp)) { 14047c478bd9Sstevel@tonic-gate if (gnp->gn_gotref == gref) 14057c478bd9Sstevel@tonic-gate return (gnp); 14067c478bd9Sstevel@tonic-gate } 14077c478bd9Sstevel@tonic-gate return ((Gotndx *)0); 14087c478bd9Sstevel@tonic-gate } 14097c478bd9Sstevel@tonic-gate 1410ba2be530Sab static Xword 14115aefb655Srie ld_calc_got_offset(Rel_desc * rdesc, Ofl_desc * ofl) 14127c478bd9Sstevel@tonic-gate { 14137c478bd9Sstevel@tonic-gate Os_desc *osp = ofl->ofl_osgot; 14147c478bd9Sstevel@tonic-gate Sym_desc *sdp = rdesc->rel_sym; 14157c478bd9Sstevel@tonic-gate Xword gotndx; 14167c478bd9Sstevel@tonic-gate Gotref gref; 14177c478bd9Sstevel@tonic-gate Gotndx *gnp; 14187c478bd9Sstevel@tonic-gate 14197c478bd9Sstevel@tonic-gate if (rdesc->rel_flags & FLG_REL_DTLS) 14207c478bd9Sstevel@tonic-gate gref = GOT_REF_TLSGD; 14217c478bd9Sstevel@tonic-gate else if (rdesc->rel_flags & FLG_REL_MTLS) 14227c478bd9Sstevel@tonic-gate gref = GOT_REF_TLSLD; 14237c478bd9Sstevel@tonic-gate else if (rdesc->rel_flags & FLG_REL_STLS) 14247c478bd9Sstevel@tonic-gate gref = GOT_REF_TLSIE; 14257c478bd9Sstevel@tonic-gate else 14267c478bd9Sstevel@tonic-gate gref = GOT_REF_GENERIC; 14277c478bd9Sstevel@tonic-gate 14285aefb655Srie gnp = ld_find_gotndx(&(sdp->sd_GOTndxs), gref, ofl, 0); 14297c478bd9Sstevel@tonic-gate assert(gnp); 14307c478bd9Sstevel@tonic-gate 14317c478bd9Sstevel@tonic-gate gotndx = (Xword)gnp->gn_gotndx; 14327c478bd9Sstevel@tonic-gate 14337c478bd9Sstevel@tonic-gate if ((rdesc->rel_flags & FLG_REL_DTLS) && 14347c478bd9Sstevel@tonic-gate (rdesc->rel_rtype == R_386_TLS_DTPOFF32)) 14357c478bd9Sstevel@tonic-gate gotndx++; 14367c478bd9Sstevel@tonic-gate 14377c478bd9Sstevel@tonic-gate return ((Xword)(osp->os_shdr->sh_addr + (gotndx * M_GOT_ENTSIZE))); 14387c478bd9Sstevel@tonic-gate } 14397c478bd9Sstevel@tonic-gate 14407c478bd9Sstevel@tonic-gate 14417c478bd9Sstevel@tonic-gate /* ARGSUSED4 */ 1442ba2be530Sab static uintptr_t 1443d326b23bSrie ld_assign_got_ndx(List * lst, Gotndx * pgnp, Gotref gref, Ofl_desc * ofl, 14447c478bd9Sstevel@tonic-gate Rel_desc * rsp, Sym_desc * sdp) 14457c478bd9Sstevel@tonic-gate { 14467c478bd9Sstevel@tonic-gate Gotndx *gnp; 14477c478bd9Sstevel@tonic-gate uint_t gotents; 14487c478bd9Sstevel@tonic-gate 14497c478bd9Sstevel@tonic-gate if (pgnp) 14507c478bd9Sstevel@tonic-gate return (1); 14517c478bd9Sstevel@tonic-gate 14527c478bd9Sstevel@tonic-gate if ((gref == GOT_REF_TLSGD) || (gref == GOT_REF_TLSLD)) 14537c478bd9Sstevel@tonic-gate gotents = 2; 14547c478bd9Sstevel@tonic-gate else 14557c478bd9Sstevel@tonic-gate gotents = 1; 14567c478bd9Sstevel@tonic-gate 14577c478bd9Sstevel@tonic-gate if ((gnp = libld_calloc(sizeof (Gotndx), 1)) == 0) 14587c478bd9Sstevel@tonic-gate return (S_ERROR); 14597c478bd9Sstevel@tonic-gate gnp->gn_gotndx = ofl->ofl_gotcnt; 14607c478bd9Sstevel@tonic-gate gnp->gn_gotref = gref; 14617c478bd9Sstevel@tonic-gate 14627c478bd9Sstevel@tonic-gate ofl->ofl_gotcnt += gotents; 14637c478bd9Sstevel@tonic-gate 14647c478bd9Sstevel@tonic-gate if (gref == GOT_REF_TLSLD) { 14657c478bd9Sstevel@tonic-gate ofl->ofl_tlsldgotndx = gnp; 14667c478bd9Sstevel@tonic-gate return (1); 14677c478bd9Sstevel@tonic-gate } 14687c478bd9Sstevel@tonic-gate 14697c478bd9Sstevel@tonic-gate if (list_appendc(lst, (void *)gnp) == 0) 14707c478bd9Sstevel@tonic-gate return (S_ERROR); 14717c478bd9Sstevel@tonic-gate 14727c478bd9Sstevel@tonic-gate return (1); 14737c478bd9Sstevel@tonic-gate } 14747c478bd9Sstevel@tonic-gate 1475ba2be530Sab static void 14765aefb655Srie ld_assign_plt_ndx(Sym_desc * sdp, Ofl_desc *ofl) 14777c478bd9Sstevel@tonic-gate { 14787c478bd9Sstevel@tonic-gate sdp->sd_aux->sa_PLTndx = 1 + ofl->ofl_pltcnt++; 14797c478bd9Sstevel@tonic-gate sdp->sd_aux->sa_PLTGOTndx = ofl->ofl_gotcnt++; 1480141040e8Srie ofl->ofl_flags |= FLG_OF_BLDGOT; 14817c478bd9Sstevel@tonic-gate } 14827c478bd9Sstevel@tonic-gate 14837c478bd9Sstevel@tonic-gate /* 14847c478bd9Sstevel@tonic-gate * Initializes .got[0] with the _DYNAMIC symbol value. 14857c478bd9Sstevel@tonic-gate */ 1486ba2be530Sab static uintptr_t 1487d326b23bSrie ld_fillin_gotplt(Ofl_desc *ofl) 14887c478bd9Sstevel@tonic-gate { 14891d9df23bSab ofl_flag_t flags = ofl->ofl_flags; 14901d9df23bSab int bswap = (ofl->ofl_flags1 & FLG_OF1_ENCDIFF) != 0; 1491d326b23bSrie 14927c478bd9Sstevel@tonic-gate if (ofl->ofl_osgot) { 1493d326b23bSrie Sym_desc *sdp; 14947c478bd9Sstevel@tonic-gate 14955aefb655Srie if ((sdp = ld_sym_find(MSG_ORIG(MSG_SYM_DYNAMIC_U), 14967c478bd9Sstevel@tonic-gate SYM_NOHASH, 0, ofl)) != NULL) { 1497d326b23bSrie uchar_t *genptr; 1498d326b23bSrie 1499d326b23bSrie genptr = ((uchar_t *)ofl->ofl_osgot->os_outdata->d_buf + 15007c478bd9Sstevel@tonic-gate (M_GOT_XDYNAMIC * M_GOT_ENTSIZE)); 15017c478bd9Sstevel@tonic-gate /* LINTED */ 15027c478bd9Sstevel@tonic-gate *(Word *)genptr = (Word)sdp->sd_sym->st_value; 1503ba2be530Sab if (bswap) 1504ba2be530Sab /* LINTED */ 1505ba2be530Sab *(Word *)genptr = 1506ba2be530Sab /* LINTED */ 1507ba2be530Sab ld_bswap_Word(*(Word *)genptr); 15087c478bd9Sstevel@tonic-gate } 15097c478bd9Sstevel@tonic-gate } 15107c478bd9Sstevel@tonic-gate 15117c478bd9Sstevel@tonic-gate /* 15127c478bd9Sstevel@tonic-gate * Fill in the reserved slot in the procedure linkage table the first 15137c478bd9Sstevel@tonic-gate * entry is: 15147c478bd9Sstevel@tonic-gate * if (building a.out) { 15157c478bd9Sstevel@tonic-gate * PUSHL got[1] # the address of the link map entry 15167c478bd9Sstevel@tonic-gate * JMP * got[2] # the address of rtbinder 15177c478bd9Sstevel@tonic-gate * } else { 15187c478bd9Sstevel@tonic-gate * PUSHL got[1]@GOT(%ebx) # the address of the link map entry 15197c478bd9Sstevel@tonic-gate * JMP * got[2]@GOT(%ebx) # the address of rtbinder 15207c478bd9Sstevel@tonic-gate * } 15217c478bd9Sstevel@tonic-gate */ 1522d326b23bSrie if ((flags & FLG_OF_DYNAMIC) && ofl->ofl_osplt) { 1523b3fbe5e6Sseizo uchar_t *pltent; 15247c478bd9Sstevel@tonic-gate 1525b3fbe5e6Sseizo pltent = (uchar_t *)ofl->ofl_osplt->os_outdata->d_buf; 1526d326b23bSrie if (!(flags & FLG_OF_SHAROBJ)) { 15277c478bd9Sstevel@tonic-gate pltent[0] = M_SPECIAL_INST; 15287c478bd9Sstevel@tonic-gate pltent[1] = M_PUSHL_DISP; 15297c478bd9Sstevel@tonic-gate pltent += 2; 15307c478bd9Sstevel@tonic-gate /* LINTED */ 15317c478bd9Sstevel@tonic-gate *(Word *)pltent = (Word)(ofl->ofl_osgot->os_shdr-> 1532de777a60Sab sh_addr + M_GOT_XLINKMAP * M_GOT_ENTSIZE); 1533ba2be530Sab if (bswap) 1534ba2be530Sab /* LINTED */ 1535ba2be530Sab *(Word *)pltent = 1536ba2be530Sab /* LINTED */ 1537ba2be530Sab ld_bswap_Word(*(Word *)pltent); 15387c478bd9Sstevel@tonic-gate pltent += 4; 15397c478bd9Sstevel@tonic-gate pltent[0] = M_SPECIAL_INST; 15407c478bd9Sstevel@tonic-gate pltent[1] = M_JMP_DISP_IND; 15417c478bd9Sstevel@tonic-gate pltent += 2; 15427c478bd9Sstevel@tonic-gate /* LINTED */ 15437c478bd9Sstevel@tonic-gate *(Word *)pltent = (Word)(ofl->ofl_osgot->os_shdr-> 1544de777a60Sab sh_addr + M_GOT_XRTLD * M_GOT_ENTSIZE); 1545ba2be530Sab if (bswap) 1546ba2be530Sab /* LINTED */ 1547ba2be530Sab *(Word *)pltent = 1548ba2be530Sab /* LINTED */ 1549ba2be530Sab ld_bswap_Word(*(Word *)pltent); 15507c478bd9Sstevel@tonic-gate } else { 15517c478bd9Sstevel@tonic-gate pltent[0] = M_SPECIAL_INST; 15527c478bd9Sstevel@tonic-gate pltent[1] = M_PUSHL_REG_DISP; 15537c478bd9Sstevel@tonic-gate pltent += 2; 15547c478bd9Sstevel@tonic-gate /* LINTED */ 15557c478bd9Sstevel@tonic-gate *(Word *)pltent = (Word)(M_GOT_XLINKMAP * 1556de777a60Sab M_GOT_ENTSIZE); 1557ba2be530Sab if (bswap) 1558ba2be530Sab /* LINTED */ 1559ba2be530Sab *(Word *)pltent = 1560ba2be530Sab /* LINTED */ 1561ba2be530Sab ld_bswap_Word(*(Word *)pltent); 15627c478bd9Sstevel@tonic-gate pltent += 4; 15637c478bd9Sstevel@tonic-gate pltent[0] = M_SPECIAL_INST; 15647c478bd9Sstevel@tonic-gate pltent[1] = M_JMP_REG_DISP_IND; 15657c478bd9Sstevel@tonic-gate pltent += 2; 15667c478bd9Sstevel@tonic-gate /* LINTED */ 15677c478bd9Sstevel@tonic-gate *(Word *)pltent = (Word)(M_GOT_XRTLD * 1568de777a60Sab M_GOT_ENTSIZE); 1569ba2be530Sab if (bswap) 1570ba2be530Sab /* LINTED */ 1571ba2be530Sab *(Word *)pltent = 1572ba2be530Sab /* LINTED */ 1573ba2be530Sab ld_bswap_Word(*(Word *)pltent); 15747c478bd9Sstevel@tonic-gate } 15757c478bd9Sstevel@tonic-gate } 15767c478bd9Sstevel@tonic-gate return (1); 15777c478bd9Sstevel@tonic-gate } 1578ba2be530Sab 1579ba2be530Sab 1580ba2be530Sab 1581ba2be530Sab /* 1582ba2be530Sab * Template for generating "void (*)(void)" function 1583ba2be530Sab */ 1584ba2be530Sab static const uchar_t nullfunc_tmpl[] = { /* IA32 */ 1585ba2be530Sab /* 0x00 */ 0xc3 /* ret */ 1586ba2be530Sab }; 1587ba2be530Sab 1588ba2be530Sab 1589ba2be530Sab 1590ba2be530Sab /* 1591ba2be530Sab * Return the ld_targ definition for this target. 1592ba2be530Sab */ 1593ba2be530Sab const Target * 1594ba2be530Sab ld_targ_init_x86(void) 1595ba2be530Sab { 1596ba2be530Sab static const Target _ld_targ = { 1597ba2be530Sab { /* Target_mach */ 1598ba2be530Sab M_MACH, /* m_mach */ 1599ba2be530Sab M_MACHPLUS, /* m_machplus */ 1600ba2be530Sab M_FLAGSPLUS, /* m_flagsplus */ 1601ba2be530Sab M_CLASS, /* m_class */ 1602ba2be530Sab M_DATA, /* m_data */ 1603ba2be530Sab 1604ba2be530Sab M_SEGM_ALIGN, /* m_segm_align */ 1605ba2be530Sab M_SEGM_ORIGIN, /* m_segm_origin */ 1606ba2be530Sab M_DATASEG_PERM, /* m_dataseg_perm */ 1607ba2be530Sab M_WORD_ALIGN, /* m_word_align */ 1608ba2be530Sab MSG_ORIG(MSG_PTH_RTLD), /* m_def_interp */ 1609ba2be530Sab 1610ba2be530Sab /* Relocation type codes */ 1611ba2be530Sab M_R_ARRAYADDR, /* m_r_arrayaddr */ 1612ba2be530Sab M_R_COPY, /* m_r_copy */ 1613ba2be530Sab M_R_GLOB_DAT, /* m_r_glob_dat */ 1614ba2be530Sab M_R_JMP_SLOT, /* m_r_jmp_slot */ 1615ba2be530Sab M_R_NUM, /* m_r_num */ 1616ba2be530Sab M_R_NONE, /* m_r_none */ 1617ba2be530Sab M_R_RELATIVE, /* m_r_relative */ 1618ba2be530Sab M_R_REGISTER, /* m_r_register */ 1619ba2be530Sab 1620ba2be530Sab /* Relocation related constants */ 1621ba2be530Sab M_REL_DT_COUNT, /* m_rel_dt_count */ 1622ba2be530Sab M_REL_DT_ENT, /* m_rel_dt_ent */ 1623ba2be530Sab M_REL_DT_SIZE, /* m_rel_dt_size */ 1624ba2be530Sab M_REL_DT_TYPE, /* m_rel_dt_type */ 1625ba2be530Sab M_REL_SHT_TYPE, /* m_rel_sht_type */ 1626ba2be530Sab 1627ba2be530Sab /* GOT related constants */ 1628ba2be530Sab M_GOT_ENTSIZE, /* m_got_entsize */ 1629ba2be530Sab M_GOT_XNumber, /* m_got_xnumber */ 1630ba2be530Sab 1631ba2be530Sab /* PLT related constants */ 1632ba2be530Sab M_PLT_ALIGN, /* m_plt_align */ 1633ba2be530Sab M_PLT_ENTSIZE, /* m_plt_entsize */ 1634ba2be530Sab M_PLT_RESERVSZ, /* m_plt_reservsz */ 1635ba2be530Sab M_PLT_SHF_FLAGS, /* m_plt_shf_flags */ 1636ba2be530Sab 1637ba2be530Sab M_DT_REGISTER, /* m_dt_register */ 1638ba2be530Sab }, 1639ba2be530Sab { /* Target_machid */ 1640ba2be530Sab M_ID_ARRAY, /* id_array */ 1641ba2be530Sab M_ID_BSS, /* id_bss */ 1642ba2be530Sab M_ID_CAP, /* id_cap */ 1643ba2be530Sab M_ID_DATA, /* id_data */ 1644ba2be530Sab M_ID_DYNAMIC, /* id_dynamic */ 1645ba2be530Sab M_ID_DYNSORT, /* id_dynsort */ 1646ba2be530Sab M_ID_DYNSTR, /* id_dynstr */ 1647ba2be530Sab M_ID_DYNSYM, /* id_dynsym */ 1648ba2be530Sab M_ID_DYNSYM_NDX, /* id_dynsym_ndx */ 1649ba2be530Sab M_ID_GOT, /* id_got */ 1650ba2be530Sab M_ID_UNKNOWN, /* id_gotdata (unused) */ 1651ba2be530Sab M_ID_HASH, /* id_hash */ 1652ba2be530Sab M_ID_INTERP, /* id_interp */ 1653ba2be530Sab M_ID_LBSS, /* id_lbss */ 1654ba2be530Sab M_ID_LDYNSYM, /* id_ldynsym */ 1655ba2be530Sab M_ID_NOTE, /* id_note */ 1656ba2be530Sab M_ID_NULL, /* id_null */ 1657ba2be530Sab M_ID_PLT, /* id_plt */ 1658ba2be530Sab M_ID_REL, /* id_rel */ 1659ba2be530Sab M_ID_STRTAB, /* id_strtab */ 1660ba2be530Sab M_ID_SYMINFO, /* id_syminfo */ 1661ba2be530Sab M_ID_SYMTAB, /* id_symtab */ 1662ba2be530Sab M_ID_SYMTAB_NDX, /* id_symtab_ndx */ 1663ba2be530Sab M_ID_TEXT, /* id_text */ 1664ba2be530Sab M_ID_TLS, /* id_tls */ 1665ba2be530Sab M_ID_TLSBSS, /* id_tlsbss */ 1666ba2be530Sab M_ID_UNKNOWN, /* id_unknown */ 1667ba2be530Sab M_ID_UNWIND, /* id_unwind */ 1668ba2be530Sab M_ID_USER, /* id_user */ 1669ba2be530Sab M_ID_VERSION, /* id_version */ 1670ba2be530Sab }, 1671ba2be530Sab { /* Target_nullfunc */ 1672ba2be530Sab nullfunc_tmpl, /* nf_template */ 1673ba2be530Sab sizeof (nullfunc_tmpl), /* nf_size */ 1674ba2be530Sab }, 1675ba2be530Sab { /* Target_machrel */ 1676ba2be530Sab reloc_table, 1677ba2be530Sab 1678ba2be530Sab ld_init_rel, /* mr_init_rel */ 1679ba2be530Sab ld_mach_eflags, /* mr_mach_eflags */ 1680ba2be530Sab ld_mach_make_dynamic, /* mr_mach_make_dynamic */ 1681ba2be530Sab ld_mach_update_odynamic, /* mr_mach_update_odynamic */ 1682ba2be530Sab ld_calc_plt_addr, /* mr_calc_plt_addr */ 1683ba2be530Sab ld_perform_outreloc, /* mr_perform_outreloc */ 1684ba2be530Sab ld_do_activerelocs, /* mr_do_activerelocs */ 1685ba2be530Sab ld_add_outrel, /* mr_add_outrel */ 1686ba2be530Sab NULL, /* mr_reloc_register */ 1687ba2be530Sab ld_reloc_local, /* mr_reloc_local */ 1688ba2be530Sab NULL, /* mr_reloc_GOTOP */ 1689ba2be530Sab ld_reloc_TLS, /* mr_reloc_TLS */ 1690ba2be530Sab NULL, /* mr_assign_got */ 1691ba2be530Sab ld_find_gotndx, /* mr_find_gotndx */ 1692ba2be530Sab ld_calc_got_offset, /* mr_calc_got_offset */ 1693ba2be530Sab ld_assign_got_ndx, /* mr_assign_got_ndx */ 1694ba2be530Sab ld_assign_plt_ndx, /* mr_assign_plt_ndx */ 1695ba2be530Sab NULL, /* mr_allocate_got */ 1696ba2be530Sab ld_fillin_gotplt, /* mr_fillin_gotplt */ 1697ba2be530Sab }, 1698ba2be530Sab { /* Target_machsym */ 1699ba2be530Sab NULL, /* ms_reg_check */ 1700ba2be530Sab NULL, /* ms_mach_sym_typecheck */ 1701ba2be530Sab NULL, /* ms_is_regsym */ 1702ba2be530Sab NULL, /* ms_reg_find */ 1703ba2be530Sab NULL /* ms_reg_enter */ 1704ba2be530Sab }, 1705ba2be530Sab { /* Target_unwind */ 1706ba2be530Sab NULL, /* uw_make_unwindhdr */ 1707ba2be530Sab NULL, /* uw_populate_unwindhdr */ 1708ba2be530Sab NULL, /* uw_append_unwind */ 1709ba2be530Sab } 1710ba2be530Sab }; 1711ba2be530Sab 1712ba2be530Sab return (&_ld_targ); 1713ba2be530Sab } 1714