15aefb655Srie /* 25aefb655Srie * CDDL HEADER START 35aefb655Srie * 45aefb655Srie * 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. 75aefb655Srie * 85aefb655Srie * You can obtain a copy of the license at usr/src/OPENSOLARIS.LICENSE 95aefb655Srie * or http://www.opensolaris.org/os/licensing. 105aefb655Srie * See the License for the specific language governing permissions 115aefb655Srie * and limitations under the License. 125aefb655Srie * 135aefb655Srie * When distributing Covered Code, include this CDDL HEADER in each 145aefb655Srie * file and include the License file at usr/src/OPENSOLARIS.LICENSE. 155aefb655Srie * If applicable, add the following below this CDDL HEADER, with the 165aefb655Srie * fields enclosed by brackets "[]" replaced with your own identifying 175aefb655Srie * information: Portions Copyright [yyyy] [name of copyright owner] 185aefb655Srie * 195aefb655Srie * CDDL HEADER END 205aefb655Srie */ 215aefb655Srie 225aefb655Srie /* 23de777a60Sab196087 * Copyright 2007 Sun Microsystems, Inc. All rights reserved. 245aefb655Srie * Use is subject to license terms. 255aefb655Srie */ 265aefb655Srie #pragma ident "%Z%%M% %I% %E% SMI" 275aefb655Srie 285aefb655Srie #include <string.h> 295aefb655Srie #include <stdio.h> 305aefb655Srie #include <strings.h> 315aefb655Srie #include <sys/elf_amd64.h> 325aefb655Srie #include <debug.h> 335aefb655Srie #include <reloc.h> 345aefb655Srie #include "msg.h" 355aefb655Srie #include "_libld.h" 365aefb655Srie 375aefb655Srie Word 385aefb655Srie ld_init_rel(Rel_desc *reld, void *reloc) 395aefb655Srie { 405aefb655Srie Rela * rel = (Rela *)reloc; 415aefb655Srie 425aefb655Srie /* LINTED */ 435aefb655Srie reld->rel_rtype = (Word)ELF_R_TYPE(rel->r_info); 445aefb655Srie reld->rel_roffset = rel->r_offset; 455aefb655Srie reld->rel_raddend = rel->r_addend; 465aefb655Srie reld->rel_typedata = 0; 475aefb655Srie 485aefb655Srie reld->rel_flags |= FLG_REL_RELA; 495aefb655Srie 505aefb655Srie return ((Word)ELF_R_SYM(rel->r_info)); 515aefb655Srie } 525aefb655Srie 535aefb655Srie void 545aefb655Srie ld_mach_eflags(Ehdr *ehdr, Ofl_desc *ofl) 555aefb655Srie { 565aefb655Srie ofl->ofl_dehdr->e_flags |= ehdr->e_flags; 575aefb655Srie } 585aefb655Srie 595aefb655Srie void 605aefb655Srie ld_mach_make_dynamic(Ofl_desc *ofl, size_t *cnt) 615aefb655Srie { 625aefb655Srie if (!(ofl->ofl_flags & FLG_OF_RELOBJ)) { 635aefb655Srie /* 645aefb655Srie * Create this entry if we are going to create a PLT table. 655aefb655Srie */ 665aefb655Srie if (ofl->ofl_pltcnt) 675aefb655Srie (*cnt)++; /* DT_PLTGOT */ 685aefb655Srie } 695aefb655Srie } 705aefb655Srie 715aefb655Srie void 725aefb655Srie ld_mach_update_odynamic(Ofl_desc *ofl, Dyn **dyn) 735aefb655Srie { 745aefb655Srie if (((ofl->ofl_flags & FLG_OF_RELOBJ) == 0) && ofl->ofl_pltcnt) { 755aefb655Srie (*dyn)->d_tag = DT_PLTGOT; 765aefb655Srie if (ofl->ofl_osgot) 775aefb655Srie (*dyn)->d_un.d_ptr = ofl->ofl_osgot->os_shdr->sh_addr; 785aefb655Srie else 795aefb655Srie (*dyn)->d_un.d_ptr = 0; 805aefb655Srie (*dyn)++; 815aefb655Srie } 825aefb655Srie } 835aefb655Srie 845aefb655Srie Xword 855aefb655Srie ld_calc_plt_addr(Sym_desc *sdp, Ofl_desc *ofl) 865aefb655Srie { 875aefb655Srie Xword value; 885aefb655Srie 895aefb655Srie value = (Xword)(ofl->ofl_osplt->os_shdr->sh_addr) + 905aefb655Srie M_PLT_RESERVSZ + ((sdp->sd_aux->sa_PLTndx - 1) * M_PLT_ENTSIZE); 915aefb655Srie return (value); 925aefb655Srie } 935aefb655Srie 945aefb655Srie /* 955aefb655Srie * Build a single plt entry - code is: 965aefb655Srie * JMP *name1@GOTPCREL(%rip) 975aefb655Srie * PUSHL $index 985aefb655Srie * JMP .PLT0 995aefb655Srie */ 1005aefb655Srie static uchar_t pltn_entry[M_PLT_ENTSIZE] = { 1015aefb655Srie /* 0x00 jmpq *name1@GOTPCREL(%rip) */ 0xff, 0x25, 0x00, 0x00, 0x00, 0x00, 1025aefb655Srie /* 0x06 pushq $index */ 0x68, 0x00, 0x00, 0x00, 0x00, 1035aefb655Srie /* 0x0b jmpq .plt0(%rip) */ 0xe9, 0x00, 0x00, 0x00, 0x00 1045aefb655Srie /* 0x10 */ 1055aefb655Srie }; 1065aefb655Srie 1075aefb655Srie static uintptr_t 1085aefb655Srie plt_entry(Ofl_desc * ofl, Sym_desc * sdp) 1095aefb655Srie { 1105aefb655Srie uchar_t *plt0, *pltent, *gotent; 1115aefb655Srie Sword plt_off; 1125aefb655Srie Word got_off; 1135aefb655Srie Xword val1; 114*f3324781Sab196087 int bswap; 1155aefb655Srie 1165aefb655Srie got_off = sdp->sd_aux->sa_PLTGOTndx * M_GOT_ENTSIZE; 1175aefb655Srie plt_off = M_PLT_RESERVSZ + ((sdp->sd_aux->sa_PLTndx - 1) * 1185aefb655Srie M_PLT_ENTSIZE); 1195aefb655Srie plt0 = (uchar_t *)(ofl->ofl_osplt->os_outdata->d_buf); 1205aefb655Srie pltent = plt0 + plt_off; 1215aefb655Srie gotent = (uchar_t *)(ofl->ofl_osgot->os_outdata->d_buf) + got_off; 1225aefb655Srie 1235aefb655Srie bcopy(pltn_entry, pltent, sizeof (pltn_entry)); 1245aefb655Srie /* 1255aefb655Srie * Fill in the got entry with the address of the next instruction. 1265aefb655Srie */ 1275aefb655Srie /* LINTED */ 1285aefb655Srie *(Word *)gotent = ofl->ofl_osplt->os_shdr->sh_addr + plt_off + 1295aefb655Srie M_PLT_INSSIZE; 1305aefb655Srie 1315aefb655Srie /* 132*f3324781Sab196087 * If '-z noreloc' is specified - skip the do_reloc_ld 133*f3324781Sab196087 * stage. 134*f3324781Sab196087 */ 135*f3324781Sab196087 if (!OFL_DO_RELOC(ofl)) 136*f3324781Sab196087 return (1); 137*f3324781Sab196087 138*f3324781Sab196087 /* 139*f3324781Sab196087 * If the running linker has a different byte order than 140*f3324781Sab196087 * the target host, tell do_reloc_ld() to swap bytes. 141*f3324781Sab196087 * 142*f3324781Sab196087 * We know the PLT is PROGBITS --- we don't have to check 143*f3324781Sab196087 */ 144*f3324781Sab196087 bswap = (ofl->ofl_flags1 & FLG_OF1_ENCDIFF) != 0; 145*f3324781Sab196087 146*f3324781Sab196087 /* 1475aefb655Srie * patchup: 1485aefb655Srie * jmpq *name1@gotpcrel(%rip) 1495aefb655Srie * 1505aefb655Srie * NOTE: 0x06 represents next instruction. 1515aefb655Srie */ 1525aefb655Srie val1 = (ofl->ofl_osgot->os_shdr->sh_addr + got_off) - 1535aefb655Srie (ofl->ofl_osplt->os_shdr->sh_addr + plt_off) - 0x06; 1545aefb655Srie 155*f3324781Sab196087 if (do_reloc_ld(R_AMD64_GOTPCREL, &pltent[0x02], 1565aefb655Srie &val1, MSG_ORIG(MSG_SYM_PLTENT), 157*f3324781Sab196087 MSG_ORIG(MSG_SPECFIL_PLTENT), bswap, ofl->ofl_lml) == 0) { 158*f3324781Sab196087 eprintf(ofl->ofl_lml, ERR_FATAL, MSG_INTL(MSG_PLT_PLTNFAIL), 159*f3324781Sab196087 sdp->sd_aux->sa_PLTndx, demangle(sdp->sd_name)); 1605aefb655Srie return (S_ERROR); 1615aefb655Srie } 1625aefb655Srie 1635aefb655Srie /* 1645aefb655Srie * patchup: 1655aefb655Srie * pushq $pltndx 1665aefb655Srie */ 1675aefb655Srie val1 = (Xword)(sdp->sd_aux->sa_PLTndx - 1); 168*f3324781Sab196087 169*f3324781Sab196087 if (do_reloc_ld(R_AMD64_32, &pltent[0x07], 1705aefb655Srie &val1, MSG_ORIG(MSG_SYM_PLTENT), 171*f3324781Sab196087 MSG_ORIG(MSG_SPECFIL_PLTENT), bswap, ofl->ofl_lml) == 0) { 172*f3324781Sab196087 eprintf(ofl->ofl_lml, ERR_FATAL, MSG_INTL(MSG_PLT_PLTNFAIL), 173*f3324781Sab196087 sdp->sd_aux->sa_PLTndx, demangle(sdp->sd_name)); 1745aefb655Srie return (S_ERROR); 1755aefb655Srie } 1765aefb655Srie 1775aefb655Srie /* 1785aefb655Srie * patchup: 1795aefb655Srie * jmpq .plt0(%rip) 180*f3324781Sab196087 * NOTE: 0x10 represents next instruction. The rather complex 181*f3324781Sab196087 * series of casts is necessary to sign extend an offset into 182*f3324781Sab196087 * a 64-bit value while satisfying various compiler error 183*f3324781Sab196087 * checks. Handle with care. 1845aefb655Srie */ 1855aefb655Srie val1 = (Xword)((intptr_t)((uintptr_t)plt0 - 1865aefb655Srie (uintptr_t)(&pltent[0x10]))); 1875aefb655Srie 188*f3324781Sab196087 if (do_reloc_ld(R_AMD64_PC32, &pltent[0x0c], 1895aefb655Srie &val1, MSG_ORIG(MSG_SYM_PLTENT), 190*f3324781Sab196087 MSG_ORIG(MSG_SPECFIL_PLTENT), bswap, ofl->ofl_lml) == 0) { 191*f3324781Sab196087 eprintf(ofl->ofl_lml, ERR_FATAL, MSG_INTL(MSG_PLT_PLTNFAIL), 192*f3324781Sab196087 sdp->sd_aux->sa_PLTndx, demangle(sdp->sd_name)); 1935aefb655Srie return (S_ERROR); 1945aefb655Srie } 195*f3324781Sab196087 1965aefb655Srie return (1); 1975aefb655Srie } 1985aefb655Srie 1995aefb655Srie uintptr_t 2005aefb655Srie ld_perform_outreloc(Rel_desc * orsp, Ofl_desc * ofl) 2015aefb655Srie { 2025aefb655Srie Os_desc * relosp, * osp = 0; 2035aefb655Srie Word ndx; 2045aefb655Srie Xword roffset, value; 2055aefb655Srie Sxword raddend; 2065aefb655Srie Rela rea; 2075aefb655Srie char *relbits; 2085aefb655Srie Sym_desc * sdp, * psym = (Sym_desc *)0; 2095aefb655Srie int sectmoved = 0; 2105aefb655Srie 2115aefb655Srie raddend = orsp->rel_raddend; 2125aefb655Srie sdp = orsp->rel_sym; 2135aefb655Srie 2145aefb655Srie /* 2155aefb655Srie * If the section this relocation is against has been discarded 2165aefb655Srie * (-zignore), then also discard (skip) the relocation itself. 2175aefb655Srie */ 2185aefb655Srie if (orsp->rel_isdesc && ((orsp->rel_flags & 2195aefb655Srie (FLG_REL_GOT | FLG_REL_BSS | FLG_REL_PLT | FLG_REL_NOINFO)) == 0) && 2205aefb655Srie (orsp->rel_isdesc->is_flags & FLG_IS_DISCARD)) { 2215aefb655Srie DBG_CALL(Dbg_reloc_discard(ofl->ofl_lml, M_MACH, orsp)); 2225aefb655Srie return (1); 2235aefb655Srie } 2245aefb655Srie 2255aefb655Srie /* 2265aefb655Srie * If this is a relocation against a move table, or expanded move 2275aefb655Srie * table, adjust the relocation entries. 2285aefb655Srie */ 2295aefb655Srie if (orsp->rel_move) 2305aefb655Srie ld_adj_movereloc(ofl, orsp); 2315aefb655Srie 2325aefb655Srie /* 2335aefb655Srie * If this is a relocation against a section then we need to adjust the 2345aefb655Srie * raddend field to compensate for the new position of the input section 2355aefb655Srie * within the new output section. 2365aefb655Srie */ 2375aefb655Srie if (ELF_ST_TYPE(sdp->sd_sym->st_info) == STT_SECTION) { 2385aefb655Srie if (ofl->ofl_parsym.head && 2395aefb655Srie (sdp->sd_isc->is_flags & FLG_IS_RELUPD) && 2405aefb655Srie /* LINTED */ 2415aefb655Srie (psym = ld_am_I_partial(orsp, orsp->rel_raddend))) { 2425aefb655Srie DBG_CALL(Dbg_move_outsctadj(ofl->ofl_lml, psym)); 2435aefb655Srie sectmoved = 1; 2445aefb655Srie if (ofl->ofl_flags & FLG_OF_RELOBJ) 2455aefb655Srie raddend = psym->sd_sym->st_value; 2465aefb655Srie else 2475aefb655Srie raddend = psym->sd_sym->st_value - 2485aefb655Srie psym->sd_isc->is_osdesc->os_shdr->sh_addr; 2495aefb655Srie /* LINTED */ 2505aefb655Srie raddend += (Off)_elf_getxoff(psym->sd_isc->is_indata); 2515aefb655Srie if (psym->sd_isc->is_shdr->sh_flags & SHF_ALLOC) 2525aefb655Srie raddend += 2535aefb655Srie psym->sd_isc->is_osdesc->os_shdr->sh_addr; 2545aefb655Srie } else { 2555aefb655Srie /* LINTED */ 2565aefb655Srie raddend += (Off)_elf_getxoff(sdp->sd_isc->is_indata); 2575aefb655Srie if (sdp->sd_isc->is_shdr->sh_flags & SHF_ALLOC) 2585aefb655Srie raddend += 2595aefb655Srie sdp->sd_isc->is_osdesc->os_shdr->sh_addr; 2605aefb655Srie } 2615aefb655Srie } 2625aefb655Srie 2635aefb655Srie value = sdp->sd_sym->st_value; 2645aefb655Srie 2655aefb655Srie if (orsp->rel_flags & FLG_REL_GOT) { 2665aefb655Srie /* 2675aefb655Srie * Note: for GOT relative relocations on amd64 2685aefb655Srie * we discard the addend. It was relevant 2695aefb655Srie * to the reference - not to the data item 2705aefb655Srie * being referenced (ie: that -4 thing). 2715aefb655Srie */ 2725aefb655Srie raddend = 0; 2735aefb655Srie osp = ofl->ofl_osgot; 2745aefb655Srie roffset = ld_calc_got_offset(orsp, ofl); 2755aefb655Srie 2765aefb655Srie } else if (orsp->rel_flags & FLG_REL_PLT) { 2775aefb655Srie /* 2785aefb655Srie * Note that relocations for PLT's actually 2795aefb655Srie * cause a relocation againt the GOT. 2805aefb655Srie */ 2815aefb655Srie osp = ofl->ofl_osplt; 2825aefb655Srie roffset = (ofl->ofl_osgot->os_shdr->sh_addr) + 2835aefb655Srie sdp->sd_aux->sa_PLTGOTndx * M_GOT_ENTSIZE; 2845aefb655Srie raddend = 0; 2855aefb655Srie if (plt_entry(ofl, sdp) == S_ERROR) 2865aefb655Srie return (S_ERROR); 2875aefb655Srie 2885aefb655Srie } else if (orsp->rel_flags & FLG_REL_BSS) { 2895aefb655Srie /* 2905aefb655Srie * This must be a R_AMD64_COPY. For these set the roffset to 2915aefb655Srie * point to the new symbols location. 2925aefb655Srie */ 2935aefb655Srie osp = ofl->ofl_isbss->is_osdesc; 2945aefb655Srie roffset = value; 2955aefb655Srie 2965aefb655Srie /* 2975aefb655Srie * The raddend doesn't mean anything in a R_SPARC_COPY 2985aefb655Srie * relocation. Null it out because it can confuse people. 2995aefb655Srie */ 3005aefb655Srie raddend = 0; 3015aefb655Srie } else { 3025aefb655Srie osp = orsp->rel_osdesc; 3035aefb655Srie 3045aefb655Srie /* 3055aefb655Srie * Calculate virtual offset of reference point; equals offset 3065aefb655Srie * into section + vaddr of section for loadable sections, or 3075aefb655Srie * offset plus section displacement for nonloadable sections. 3085aefb655Srie */ 3095aefb655Srie roffset = orsp->rel_roffset + 3105aefb655Srie (Off)_elf_getxoff(orsp->rel_isdesc->is_indata); 3115aefb655Srie if (!(ofl->ofl_flags & FLG_OF_RELOBJ)) 3125aefb655Srie roffset += orsp->rel_isdesc->is_osdesc-> 3135aefb655Srie os_shdr->sh_addr; 3145aefb655Srie } 3155aefb655Srie 3165aefb655Srie if ((osp == 0) || ((relosp = osp->os_relosdesc) == 0)) 3175aefb655Srie relosp = ofl->ofl_osrel; 3185aefb655Srie 3195aefb655Srie /* 3205aefb655Srie * Assign the symbols index for the output relocation. If the 3215aefb655Srie * relocation refers to a SECTION symbol then it's index is based upon 3225aefb655Srie * the output sections symbols index. Otherwise the index can be 3235aefb655Srie * derived from the symbols index itself. 3245aefb655Srie */ 3255aefb655Srie if (orsp->rel_rtype == R_AMD64_RELATIVE) 3265aefb655Srie ndx = STN_UNDEF; 3275aefb655Srie else if ((orsp->rel_flags & FLG_REL_SCNNDX) || 3285aefb655Srie (ELF_ST_TYPE(sdp->sd_sym->st_info) == STT_SECTION)) { 3295aefb655Srie if (sectmoved == 0) { 3305aefb655Srie /* 3315aefb655Srie * Check for a null input section. This can 3325aefb655Srie * occur if this relocation references a symbol 3335aefb655Srie * generated by sym_add_sym(). 3345aefb655Srie */ 3355aefb655Srie if ((sdp->sd_isc != 0) && 3365aefb655Srie (sdp->sd_isc->is_osdesc != 0)) 3375aefb655Srie ndx = sdp->sd_isc->is_osdesc->os_scnsymndx; 3385aefb655Srie else 3395aefb655Srie ndx = sdp->sd_shndx; 3405aefb655Srie } else 3415aefb655Srie ndx = ofl->ofl_sunwdata1ndx; 3425aefb655Srie } else 3435aefb655Srie ndx = sdp->sd_symndx; 3445aefb655Srie 3455aefb655Srie /* 3465aefb655Srie * Add the symbols 'value' to the addend field. 3475aefb655Srie */ 3485aefb655Srie if (orsp->rel_flags & FLG_REL_ADVAL) 3495aefb655Srie raddend += value; 3505aefb655Srie 3515aefb655Srie /* 3527010c12aSrie * The addend field for R_AMD64_DTPMOD64 means nothing. The addend 3537010c12aSrie * is propagated in the corresponding R_AMD64_DTPOFF64 relocation. 3545aefb655Srie */ 3555aefb655Srie if (orsp->rel_rtype == R_AMD64_DTPMOD64) 3565aefb655Srie raddend = 0; 3575aefb655Srie 3585aefb655Srie relbits = (char *)relosp->os_outdata->d_buf; 3595aefb655Srie 3605aefb655Srie rea.r_info = ELF_R_INFO(ndx, orsp->rel_rtype); 3615aefb655Srie rea.r_offset = roffset; 3625aefb655Srie rea.r_addend = raddend; 3635aefb655Srie DBG_CALL(Dbg_reloc_out(ofl, ELF_DBG_LD, SHT_RELA, &rea, relosp->os_name, 3645aefb655Srie orsp->rel_sname)); 3655aefb655Srie 3665aefb655Srie /* 3675aefb655Srie * Assert we haven't walked off the end of our relocation table. 3685aefb655Srie */ 3695aefb655Srie assert(relosp->os_szoutrels <= relosp->os_shdr->sh_size); 3705aefb655Srie 3715aefb655Srie (void) memcpy((relbits + relosp->os_szoutrels), 3725aefb655Srie (char *)&rea, sizeof (Rela)); 3735aefb655Srie relosp->os_szoutrels += (Xword)sizeof (Rela); 3745aefb655Srie 3755aefb655Srie /* 3765aefb655Srie * Determine if this relocation is against a non-writable, allocatable 3775aefb655Srie * section. If so we may need to provide a text relocation diagnostic. 3785aefb655Srie * Note that relocations against the .plt (R_AMD64_JUMP_SLOT) actually 3795aefb655Srie * result in modifications to the .got. 3805aefb655Srie */ 3815aefb655Srie if (orsp->rel_rtype == R_AMD64_JUMP_SLOT) 3825aefb655Srie osp = ofl->ofl_osgot; 3835aefb655Srie 3845aefb655Srie ld_reloc_remain_entry(orsp, osp, ofl); 3855aefb655Srie return (1); 3865aefb655Srie } 3875aefb655Srie 3885aefb655Srie /* 3895aefb655Srie * amd64 Instructions for TLS processing 3905aefb655Srie */ 3915aefb655Srie static uchar_t tlsinstr_gd_ie[] = { 3925aefb655Srie /* 3935aefb655Srie * 0x00 movq %fs:0, %rax 3945aefb655Srie */ 3955aefb655Srie 0x64, 0x48, 0x8b, 0x04, 0x25, 3965aefb655Srie 0x00, 0x00, 0x00, 0x00, 3975aefb655Srie /* 3985aefb655Srie * 0x09 addq x@gottpoff(%rip), %rax 3995aefb655Srie */ 4005aefb655Srie 0x48, 0x03, 0x05, 0x00, 0x00, 4015aefb655Srie 0x00, 0x00 4025aefb655Srie }; 4035aefb655Srie 4045aefb655Srie static uchar_t tlsinstr_gd_le[] = { 4055aefb655Srie /* 4065aefb655Srie * 0x00 movq %fs:0, %rax 4075aefb655Srie */ 4085aefb655Srie 0x64, 0x48, 0x8b, 0x04, 0x25, 4095aefb655Srie 0x00, 0x00, 0x00, 0x00, 4105aefb655Srie /* 4115aefb655Srie * 0x09 leaq x@gottpoff(%rip), %rax 4125aefb655Srie */ 4135aefb655Srie 0x48, 0x8d, 0x80, 0x00, 0x00, 4145aefb655Srie 0x00, 0x00 4155aefb655Srie }; 4165aefb655Srie 4175aefb655Srie static uchar_t tlsinstr_ld_le[] = { 4185aefb655Srie /* 4195aefb655Srie * .byte 0x66 4205aefb655Srie */ 4215aefb655Srie 0x66, 4225aefb655Srie /* 4235aefb655Srie * .byte 0x66 4245aefb655Srie */ 4255aefb655Srie 0x66, 4265aefb655Srie /* 4275aefb655Srie * .byte 0x66 4285aefb655Srie */ 4295aefb655Srie 0x66, 4305aefb655Srie /* 4315aefb655Srie * movq %fs:0, %rax 4325aefb655Srie */ 4335aefb655Srie 0x64, 0x48, 0x8b, 0x04, 0x25, 4345aefb655Srie 0x00, 0x00, 0x00, 0x00 4355aefb655Srie }; 4365aefb655Srie 4375aefb655Srie 4385aefb655Srie static Fixupret 4395aefb655Srie tls_fixups(Ofl_desc *ofl, Rel_desc *arsp) 4405aefb655Srie { 4415aefb655Srie Sym_desc *sdp = arsp->rel_sym; 4425aefb655Srie Word rtype = arsp->rel_rtype; 4435aefb655Srie uchar_t *offset; 4445aefb655Srie 4455aefb655Srie offset = (uchar_t *)((uintptr_t)arsp->rel_roffset + 4465aefb655Srie (uintptr_t)_elf_getxoff(arsp->rel_isdesc->is_indata) + 4475aefb655Srie (uintptr_t)arsp->rel_osdesc->os_outdata->d_buf); 4485aefb655Srie 4495aefb655Srie if (sdp->sd_ref == REF_DYN_NEED) { 4505aefb655Srie /* 4515aefb655Srie * IE reference model 4525aefb655Srie */ 4535aefb655Srie switch (rtype) { 4545aefb655Srie case R_AMD64_TLSGD: 4555aefb655Srie /* 4565aefb655Srie * GD -> IE 4575aefb655Srie * 4585aefb655Srie * Transition: 4595aefb655Srie * 0x00 .byte 0x66 4605aefb655Srie * 0x01 leaq x@tlsgd(%rip), %rdi 4615aefb655Srie * 0x08 .word 0x6666 4625aefb655Srie * 0x0a rex64 4635aefb655Srie * 0x0b call __tls_get_addr@plt 4645aefb655Srie * 0x10 4655aefb655Srie * To: 4665aefb655Srie * 0x00 movq %fs:0, %rax 4675aefb655Srie * 0x09 addq x@gottpoff(%rip), %rax 4685aefb655Srie * 0x10 4695aefb655Srie */ 4705aefb655Srie DBG_CALL(Dbg_reloc_transition(ofl->ofl_lml, M_MACH, 471051d39bbSrie R_AMD64_GOTTPOFF, arsp)); 4725aefb655Srie arsp->rel_rtype = R_AMD64_GOTTPOFF; 4735aefb655Srie arsp->rel_roffset += 8; 4745aefb655Srie arsp->rel_raddend = (Sxword)-4; 4755aefb655Srie 4765aefb655Srie /* 477051d39bbSrie * Adjust 'offset' to beginning of instruction 4785aefb655Srie * sequence. 4795aefb655Srie */ 4805aefb655Srie offset -= 4; 4815aefb655Srie (void) memcpy(offset, tlsinstr_gd_ie, 4825aefb655Srie sizeof (tlsinstr_gd_ie)); 4835aefb655Srie return (FIX_RELOC); 4845aefb655Srie 4855aefb655Srie case R_AMD64_PLT32: 4865aefb655Srie /* 487051d39bbSrie * Fixup done via the TLS_GD relocation. 4885aefb655Srie */ 4895aefb655Srie DBG_CALL(Dbg_reloc_transition(ofl->ofl_lml, M_MACH, 490051d39bbSrie R_AMD64_NONE, arsp)); 4915aefb655Srie return (FIX_DONE); 4925aefb655Srie } 4935aefb655Srie } 4945aefb655Srie 4955aefb655Srie /* 4965aefb655Srie * LE reference model 4975aefb655Srie */ 4985aefb655Srie switch (rtype) { 4995aefb655Srie case R_AMD64_TLSGD: 5005aefb655Srie /* 5015aefb655Srie * GD -> LE 5025aefb655Srie * 5035aefb655Srie * Transition: 5045aefb655Srie * 0x00 .byte 0x66 5055aefb655Srie * 0x01 leaq x@tlsgd(%rip), %rdi 5065aefb655Srie * 0x08 .word 0x6666 5075aefb655Srie * 0x0a rex64 5085aefb655Srie * 0x0b call __tls_get_addr@plt 5095aefb655Srie * 0x10 5105aefb655Srie * To: 5115aefb655Srie * 0x00 movq %fs:0, %rax 5125aefb655Srie * 0x09 leaq x@tpoff(%rax), %rax 5135aefb655Srie * 0x10 5145aefb655Srie */ 5155aefb655Srie DBG_CALL(Dbg_reloc_transition(ofl->ofl_lml, M_MACH, 516051d39bbSrie R_AMD64_TPOFF32, arsp)); 5175aefb655Srie arsp->rel_rtype = R_AMD64_TPOFF32; 5185aefb655Srie arsp->rel_roffset += 8; 5195aefb655Srie arsp->rel_raddend = 0; 5205aefb655Srie 5215aefb655Srie /* 522051d39bbSrie * Adjust 'offset' to beginning of instruction sequence. 5235aefb655Srie */ 5245aefb655Srie offset -= 4; 5255aefb655Srie (void) memcpy(offset, tlsinstr_gd_le, sizeof (tlsinstr_gd_le)); 5265aefb655Srie return (FIX_RELOC); 5275aefb655Srie 5285aefb655Srie case R_AMD64_GOTTPOFF: 5295aefb655Srie /* 5305aefb655Srie * IE -> LE 5315aefb655Srie * 5325aefb655Srie * Transition: 5335aefb655Srie * 0x00 movq %fs:0, %rax 5345aefb655Srie * 0x09 addq x@gottopoff(%rip), %rax 5355aefb655Srie * 0x10 5365aefb655Srie * To: 5375aefb655Srie * 0x00 movq %fs:0, %rax 5385aefb655Srie * 0x09 leaq x@tpoff(%rax), %rax 5395aefb655Srie * 0x10 5405aefb655Srie */ 541051d39bbSrie DBG_CALL(Dbg_reloc_transition(ofl->ofl_lml, M_MACH, 542051d39bbSrie R_AMD64_TPOFF32, arsp)); 5435aefb655Srie arsp->rel_rtype = R_AMD64_TPOFF32; 5445aefb655Srie arsp->rel_raddend = 0; 5455aefb655Srie 5465aefb655Srie /* 547051d39bbSrie * Adjust 'offset' to beginning of instruction sequence. 5485aefb655Srie */ 5495aefb655Srie offset -= 12; 5505aefb655Srie 5515aefb655Srie /* 552051d39bbSrie * Same code sequence used in the GD -> LE transition. 5535aefb655Srie */ 5545aefb655Srie (void) memcpy(offset, tlsinstr_gd_le, sizeof (tlsinstr_gd_le)); 5555aefb655Srie return (FIX_RELOC); 5565aefb655Srie 5575aefb655Srie case R_AMD64_TLSLD: 5585aefb655Srie /* 5595aefb655Srie * LD -> LE 5605aefb655Srie * 5615aefb655Srie * Transition 5625aefb655Srie * 0x00 leaq x1@tlsgd(%rip), %rdi 5635aefb655Srie * 0x07 call __tls_get_addr@plt 5645aefb655Srie * 0x0c 5655aefb655Srie * To: 5665aefb655Srie * 0x00 .byte 0x66 5675aefb655Srie * 0x01 .byte 0x66 5685aefb655Srie * 0x02 .byte 0x66 5695aefb655Srie * 0x03 movq %fs:0, %rax 5705aefb655Srie */ 571051d39bbSrie DBG_CALL(Dbg_reloc_transition(ofl->ofl_lml, M_MACH, 572051d39bbSrie R_AMD64_NONE, arsp)); 5735aefb655Srie offset -= 3; 5745aefb655Srie (void) memcpy(offset, tlsinstr_ld_le, sizeof (tlsinstr_ld_le)); 5755aefb655Srie return (FIX_DONE); 5765aefb655Srie 5775aefb655Srie case R_AMD64_DTPOFF32: 5785aefb655Srie /* 5795aefb655Srie * LD->LE 5805aefb655Srie * 5815aefb655Srie * Transition: 5825aefb655Srie * 0x00 leaq x1@dtpoff(%rax), %rcx 5835aefb655Srie * To: 5845aefb655Srie * 0x00 leaq x1@tpoff(%rax), %rcx 5855aefb655Srie */ 586051d39bbSrie DBG_CALL(Dbg_reloc_transition(ofl->ofl_lml, M_MACH, 587051d39bbSrie R_AMD64_TPOFF32, arsp)); 5885aefb655Srie arsp->rel_rtype = R_AMD64_TPOFF32; 5895aefb655Srie arsp->rel_raddend = 0; 5905aefb655Srie return (FIX_RELOC); 5915aefb655Srie } 5925aefb655Srie 5935aefb655Srie return (FIX_RELOC); 5945aefb655Srie } 5955aefb655Srie 5965aefb655Srie uintptr_t 5975aefb655Srie ld_do_activerelocs(Ofl_desc *ofl) 5985aefb655Srie { 5995aefb655Srie Rel_desc *arsp; 6005aefb655Srie Rel_cache *rcp; 6015aefb655Srie Listnode *lnp; 6025aefb655Srie uintptr_t return_code = 1; 6035aefb655Srie Word flags = ofl->ofl_flags; 6045aefb655Srie 6057010c12aSrie if (ofl->ofl_actrels.head) 6065aefb655Srie DBG_CALL(Dbg_reloc_doact_title(ofl->ofl_lml)); 6077010c12aSrie 6085aefb655Srie /* 6095aefb655Srie * Process active relocations. 6105aefb655Srie */ 6115aefb655Srie for (LIST_TRAVERSE(&ofl->ofl_actrels, lnp, rcp)) { 6125aefb655Srie /* LINTED */ 6135aefb655Srie for (arsp = (Rel_desc *)(rcp + 1); 6145aefb655Srie arsp < rcp->rc_free; arsp++) { 6155aefb655Srie uchar_t *addr; 6165aefb655Srie Xword value; 6175aefb655Srie Sym_desc *sdp; 6185aefb655Srie const char *ifl_name; 6195aefb655Srie Xword refaddr; 6205aefb655Srie int moved = 0; 6215aefb655Srie Gotref gref; 6225aefb655Srie 6235aefb655Srie /* 6245aefb655Srie * If the section this relocation is against has been 6255aefb655Srie * discarded (-zignore), then discard (skip) the 6265aefb655Srie * relocation itself. 6275aefb655Srie */ 6285aefb655Srie if ((arsp->rel_isdesc->is_flags & FLG_IS_DISCARD) && 6295aefb655Srie ((arsp->rel_flags & 6305aefb655Srie (FLG_REL_GOT | FLG_REL_BSS | 6315aefb655Srie FLG_REL_PLT | FLG_REL_NOINFO)) == 0)) { 6325aefb655Srie DBG_CALL(Dbg_reloc_discard(ofl->ofl_lml, 6335aefb655Srie M_MACH, arsp)); 6345aefb655Srie continue; 6355aefb655Srie } 6365aefb655Srie 6375aefb655Srie /* 6385aefb655Srie * We deteremine what the 'got reference' 6395aefb655Srie * model (if required) is at this point. This 6405aefb655Srie * needs to be done before tls_fixup() since 6415aefb655Srie * it may 'transition' our instructions. 6425aefb655Srie * 6435aefb655Srie * The got table entries have already been assigned, 6445aefb655Srie * and we bind to those initial entries. 6455aefb655Srie */ 6465aefb655Srie if (arsp->rel_flags & FLG_REL_DTLS) 6475aefb655Srie gref = GOT_REF_TLSGD; 6485aefb655Srie else if (arsp->rel_flags & FLG_REL_MTLS) 6495aefb655Srie gref = GOT_REF_TLSLD; 6505aefb655Srie else if (arsp->rel_flags & FLG_REL_STLS) 6515aefb655Srie gref = GOT_REF_TLSIE; 6525aefb655Srie else 6535aefb655Srie gref = GOT_REF_GENERIC; 6545aefb655Srie 6555aefb655Srie /* 6565aefb655Srie * Perform any required TLS fixups. 6575aefb655Srie */ 6585aefb655Srie if (arsp->rel_flags & FLG_REL_TLSFIX) { 6595aefb655Srie Fixupret ret; 6605aefb655Srie 6615aefb655Srie if ((ret = tls_fixups(ofl, arsp)) == FIX_ERROR) 6625aefb655Srie return (S_ERROR); 6635aefb655Srie if (ret == FIX_DONE) 6645aefb655Srie continue; 6655aefb655Srie } 6665aefb655Srie 6675aefb655Srie /* 6685aefb655Srie * If this is a relocation against a move table, or 6695aefb655Srie * expanded move table, adjust the relocation entries. 6705aefb655Srie */ 6715aefb655Srie if (arsp->rel_move) 6725aefb655Srie ld_adj_movereloc(ofl, arsp); 6735aefb655Srie 6745aefb655Srie sdp = arsp->rel_sym; 6755aefb655Srie refaddr = arsp->rel_roffset + 6765aefb655Srie (Off)_elf_getxoff(arsp->rel_isdesc->is_indata); 6775aefb655Srie 6785aefb655Srie if ((arsp->rel_flags & FLG_REL_CLVAL) || 6795aefb655Srie (arsp->rel_flags & FLG_REL_GOTCL)) 6805aefb655Srie value = 0; 6815aefb655Srie else if (ELF_ST_TYPE(sdp->sd_sym->st_info) == 6825aefb655Srie STT_SECTION) { 6835aefb655Srie Sym_desc *sym; 6845aefb655Srie 6855aefb655Srie /* 6865aefb655Srie * The value for a symbol pointing to a SECTION 6875aefb655Srie * is based off of that sections position. 6885aefb655Srie * 6895aefb655Srie * The second argument of the ld_am_I_partial() 6905aefb655Srie * is the value stored at the target address 6915aefb655Srie * relocation is going to be applied. 6925aefb655Srie */ 6935aefb655Srie if ((sdp->sd_isc->is_flags & FLG_IS_RELUPD) && 6945aefb655Srie /* LINTED */ 6955aefb655Srie (sym = ld_am_I_partial(arsp, *(Xword *) 6965aefb655Srie ((uchar_t *) 6975aefb655Srie arsp->rel_isdesc->is_indata->d_buf + 6985aefb655Srie arsp->rel_roffset)))) { 6995aefb655Srie /* 7005aefb655Srie * If the symbol is moved, 7015aefb655Srie * adjust the value 7025aefb655Srie */ 7035aefb655Srie value = sym->sd_sym->st_value; 7045aefb655Srie moved = 1; 7055aefb655Srie } else { 7065aefb655Srie value = _elf_getxoff( 7075aefb655Srie sdp->sd_isc->is_indata); 7085aefb655Srie if (sdp->sd_isc->is_shdr->sh_flags & 7095aefb655Srie SHF_ALLOC) 710de777a60Sab196087 value += 711de777a60Sab196087 sdp->sd_isc->is_osdesc-> 7125aefb655Srie os_shdr->sh_addr; 7135aefb655Srie } 7145aefb655Srie if (sdp->sd_isc->is_shdr->sh_flags & SHF_TLS) 7155aefb655Srie value -= ofl->ofl_tlsphdr->p_vaddr; 7162926dd2eSrie 7172926dd2eSrie } else if (IS_SIZE(arsp->rel_rtype)) { 7182926dd2eSrie /* 7192926dd2eSrie * Size relocations require the symbols size. 7202926dd2eSrie */ 7212926dd2eSrie value = sdp->sd_sym->st_size; 7225aefb655Srie } else { 7235aefb655Srie /* 7247010c12aSrie * Else the value is the symbols value. 7255aefb655Srie */ 7265aefb655Srie value = sdp->sd_sym->st_value; 7275aefb655Srie } 7285aefb655Srie 7295aefb655Srie /* 7305aefb655Srie * Relocation against the GLOBAL_OFFSET_TABLE. 7315aefb655Srie */ 7325aefb655Srie if (arsp->rel_flags & FLG_REL_GOT) 7335aefb655Srie arsp->rel_osdesc = ofl->ofl_osgot; 7345aefb655Srie 7355aefb655Srie /* 7365aefb655Srie * If loadable and not producing a relocatable object 7375aefb655Srie * add the sections virtual address to the reference 7385aefb655Srie * address. 7395aefb655Srie */ 7405aefb655Srie if ((arsp->rel_flags & FLG_REL_LOAD) && 7415aefb655Srie ((flags & FLG_OF_RELOBJ) == 0)) 7425aefb655Srie refaddr += arsp->rel_isdesc->is_osdesc-> 7435aefb655Srie os_shdr->sh_addr; 7445aefb655Srie 7455aefb655Srie /* 7465aefb655Srie * If this entry has a PLT assigned to it, it's 7475aefb655Srie * value is actually the address of the PLT (and 7485aefb655Srie * not the address of the function). 7495aefb655Srie */ 7505aefb655Srie if (IS_PLT(arsp->rel_rtype)) { 7515aefb655Srie if (sdp->sd_aux && sdp->sd_aux->sa_PLTndx) 7525aefb655Srie value = ld_calc_plt_addr(sdp, ofl); 7535aefb655Srie } 7545aefb655Srie 7555aefb655Srie /* 7565aefb655Srie * Add relocations addend to value. Add extra 7575aefb655Srie * relocation addend if needed. 7585aefb655Srie * 7595aefb655Srie * Note: for GOT relative relocations on amd64 7605aefb655Srie * we discard the addend. It was relevant 7615aefb655Srie * to the reference - not to the data item 7625aefb655Srie * being referenced (ie: that -4 thing). 7635aefb655Srie */ 7645aefb655Srie if ((arsp->rel_flags & FLG_REL_GOT) == 0) 7655aefb655Srie value += arsp->rel_raddend; 7665aefb655Srie 7675aefb655Srie /* 7685aefb655Srie * Determine whether the value needs further adjustment. 7695aefb655Srie * Filter through the attributes of the relocation to 7705aefb655Srie * determine what adjustment is required. Note, many 7715aefb655Srie * of the following cases are only applicable when a 7725aefb655Srie * .got is present. As a .got is not generated when a 7735aefb655Srie * relocatable object is being built, any adjustments 7745aefb655Srie * that require a .got need to be skipped. 7755aefb655Srie */ 7765aefb655Srie if ((arsp->rel_flags & FLG_REL_GOT) && 7775aefb655Srie ((flags & FLG_OF_RELOBJ) == 0)) { 7785aefb655Srie Xword R1addr; 7795aefb655Srie uintptr_t R2addr; 7805aefb655Srie Word gotndx; 7815aefb655Srie Gotndx *gnp; 7825aefb655Srie 7835aefb655Srie /* 7845aefb655Srie * Perform relocation against GOT table. Since 7855aefb655Srie * this doesn't fit exactly into a relocation 7865aefb655Srie * we place the appropriate byte in the GOT 7875aefb655Srie * directly 7885aefb655Srie * 7895aefb655Srie * Calculate offset into GOT at which to apply 7905aefb655Srie * the relocation. 7915aefb655Srie */ 7925aefb655Srie gnp = ld_find_gotndx(&(sdp->sd_GOTndxs), gref, 7935aefb655Srie ofl, arsp); 7945aefb655Srie assert(gnp); 7955aefb655Srie 7965aefb655Srie if (arsp->rel_rtype == R_AMD64_DTPOFF64) 7975aefb655Srie gotndx = gnp->gn_gotndx + 1; 7985aefb655Srie else 7995aefb655Srie gotndx = gnp->gn_gotndx; 8005aefb655Srie 8015aefb655Srie R1addr = (Xword)(gotndx * M_GOT_ENTSIZE); 8025aefb655Srie 8035aefb655Srie /* 8045aefb655Srie * Add the GOTs data's offset. 8055aefb655Srie */ 8065aefb655Srie R2addr = R1addr + (uintptr_t) 8075aefb655Srie arsp->rel_osdesc->os_outdata->d_buf; 8085aefb655Srie 8095aefb655Srie DBG_CALL(Dbg_reloc_doact(ofl->ofl_lml, 8105aefb655Srie ELF_DBG_LD, M_MACH, SHT_RELA, 8115aefb655Srie arsp->rel_rtype, R1addr, value, 8125aefb655Srie arsp->rel_sname, arsp->rel_osdesc)); 8135aefb655Srie 8145aefb655Srie /* 8155aefb655Srie * And do it. 8165aefb655Srie */ 817*f3324781Sab196087 if (ofl->ofl_flags1 & FLG_OF1_ENCDIFF) 818*f3324781Sab196087 *(Xword *)R2addr = 819*f3324781Sab196087 ld_byteswap_Xword(value); 820*f3324781Sab196087 else 8215aefb655Srie *(Xword *)R2addr = value; 8225aefb655Srie continue; 8235aefb655Srie 8245aefb655Srie } else if (IS_GOT_BASED(arsp->rel_rtype) && 8255aefb655Srie ((flags & FLG_OF_RELOBJ) == 0)) { 8265aefb655Srie value -= ofl->ofl_osgot->os_shdr->sh_addr; 8275aefb655Srie 8285aefb655Srie } else if (IS_GOTPCREL(arsp->rel_rtype) && 8295aefb655Srie ((flags & FLG_OF_RELOBJ) == 0)) { 8305aefb655Srie Gotndx *gnp; 8315aefb655Srie 8325aefb655Srie /* 8335aefb655Srie * Calculation: 8345aefb655Srie * G + GOT + A - P 8355aefb655Srie */ 8365aefb655Srie gnp = ld_find_gotndx(&(sdp->sd_GOTndxs), 8375aefb655Srie gref, ofl, arsp); 8385aefb655Srie assert(gnp); 8395aefb655Srie value = (Xword)(ofl->ofl_osgot->os_shdr-> 8405aefb655Srie sh_addr) + ((Xword)gnp->gn_gotndx * 8415aefb655Srie M_GOT_ENTSIZE) + arsp->rel_raddend - 8425aefb655Srie refaddr; 8435aefb655Srie 8445aefb655Srie } else if (IS_GOT_PC(arsp->rel_rtype) && 8455aefb655Srie ((flags & FLG_OF_RELOBJ) == 0)) { 8465aefb655Srie value = (Xword)(ofl->ofl_osgot->os_shdr-> 8475aefb655Srie sh_addr) - refaddr + arsp->rel_raddend; 8485aefb655Srie 8495aefb655Srie } else if ((IS_PC_RELATIVE(arsp->rel_rtype)) && 8505aefb655Srie (((flags & FLG_OF_RELOBJ) == 0) || 8515aefb655Srie (arsp->rel_osdesc == sdp->sd_isc->is_osdesc))) { 8525aefb655Srie value -= refaddr; 8535aefb655Srie 8545aefb655Srie } else if (IS_TLS_INS(arsp->rel_rtype) && 8555aefb655Srie IS_GOT_RELATIVE(arsp->rel_rtype) && 8565aefb655Srie ((flags & FLG_OF_RELOBJ) == 0)) { 8575aefb655Srie Gotndx *gnp; 8585aefb655Srie 8595aefb655Srie gnp = ld_find_gotndx(&(sdp->sd_GOTndxs), gref, 8605aefb655Srie ofl, arsp); 8615aefb655Srie assert(gnp); 8625aefb655Srie value = (Xword)gnp->gn_gotndx * M_GOT_ENTSIZE; 8635aefb655Srie 8645aefb655Srie } else if (IS_GOT_RELATIVE(arsp->rel_rtype) && 8655aefb655Srie ((flags & FLG_OF_RELOBJ) == 0)) { 8665aefb655Srie Gotndx *gnp; 8675aefb655Srie 8685aefb655Srie gnp = ld_find_gotndx(&(sdp->sd_GOTndxs), 8695aefb655Srie gref, ofl, arsp); 8705aefb655Srie assert(gnp); 8715aefb655Srie value = (Xword)gnp->gn_gotndx * M_GOT_ENTSIZE; 8725aefb655Srie 8735aefb655Srie } else if ((arsp->rel_flags & FLG_REL_STLS) && 8745aefb655Srie ((flags & FLG_OF_RELOBJ) == 0)) { 8755aefb655Srie Xword tlsstatsize; 8765aefb655Srie 8775aefb655Srie /* 8785aefb655Srie * This is the LE TLS reference model. Static 8795aefb655Srie * offset is hard-coded. 8805aefb655Srie */ 8815aefb655Srie tlsstatsize = 8825aefb655Srie S_ROUND(ofl->ofl_tlsphdr->p_memsz, 8835aefb655Srie M_TLSSTATALIGN); 8845aefb655Srie value = tlsstatsize - value; 8855aefb655Srie 8865aefb655Srie /* 8875aefb655Srie * Since this code is fixed up, it assumes a 8885aefb655Srie * negative offset that can be added to the 8895aefb655Srie * thread pointer. 8905aefb655Srie */ 8915aefb655Srie if (arsp->rel_rtype == R_AMD64_TPOFF32) 8925aefb655Srie value = -value; 8935aefb655Srie } 8945aefb655Srie 8955aefb655Srie if (arsp->rel_isdesc->is_file) 8965aefb655Srie ifl_name = arsp->rel_isdesc->is_file->ifl_name; 8975aefb655Srie else 8985aefb655Srie ifl_name = MSG_INTL(MSG_STR_NULL); 8995aefb655Srie 9005aefb655Srie /* 9015aefb655Srie * Make sure we have data to relocate. Compiler and 9025aefb655Srie * assembler developers have been known to generate 9035aefb655Srie * relocations against invalid sections (normally .bss), 9045aefb655Srie * so for their benefit give them sufficient information 9055aefb655Srie * to help analyze the problem. End users should never 9065aefb655Srie * see this. 9075aefb655Srie */ 9085aefb655Srie if (arsp->rel_isdesc->is_indata->d_buf == 0) { 909de777a60Sab196087 Conv_inv_buf_t inv_buf; 910de777a60Sab196087 9115aefb655Srie eprintf(ofl->ofl_lml, ERR_FATAL, 9125aefb655Srie MSG_INTL(MSG_REL_EMPTYSEC), 913de777a60Sab196087 conv_reloc_amd64_type(arsp->rel_rtype, 914de777a60Sab196087 0, &inv_buf), ifl_name, 915de777a60Sab196087 demangle(arsp->rel_sname), 9165aefb655Srie arsp->rel_isdesc->is_name); 9175aefb655Srie return (S_ERROR); 9185aefb655Srie } 9195aefb655Srie 9205aefb655Srie /* 9215aefb655Srie * Get the address of the data item we need to modify. 9225aefb655Srie */ 9235aefb655Srie addr = (uchar_t *)((uintptr_t)arsp->rel_roffset + 9245aefb655Srie (uintptr_t)_elf_getxoff(arsp->rel_isdesc-> 9255aefb655Srie is_indata)); 9265aefb655Srie 9275aefb655Srie DBG_CALL(Dbg_reloc_doact(ofl->ofl_lml, ELF_DBG_LD, 9285aefb655Srie M_MACH, SHT_RELA, arsp->rel_rtype, EC_NATPTR(addr), 9295aefb655Srie value, arsp->rel_sname, arsp->rel_osdesc)); 9305aefb655Srie addr += (uintptr_t)arsp->rel_osdesc->os_outdata->d_buf; 9315aefb655Srie 9325aefb655Srie if ((((uintptr_t)addr - (uintptr_t)ofl->ofl_nehdr) > 9335aefb655Srie ofl->ofl_size) || (arsp->rel_roffset > 9345aefb655Srie arsp->rel_osdesc->os_shdr->sh_size)) { 9355aefb655Srie int class; 936de777a60Sab196087 Conv_inv_buf_t inv_buf; 9375aefb655Srie 9385aefb655Srie if (((uintptr_t)addr - 9395aefb655Srie (uintptr_t)ofl->ofl_nehdr) > ofl->ofl_size) 9405aefb655Srie class = ERR_FATAL; 9415aefb655Srie else 9425aefb655Srie class = ERR_WARNING; 9435aefb655Srie 9445aefb655Srie eprintf(ofl->ofl_lml, class, 9455aefb655Srie MSG_INTL(MSG_REL_INVALOFFSET), 946de777a60Sab196087 conv_reloc_amd64_type(arsp->rel_rtype, 947de777a60Sab196087 0, &inv_buf), ifl_name, 948de777a60Sab196087 arsp->rel_isdesc->is_name, 9495aefb655Srie demangle(arsp->rel_sname), 9505aefb655Srie EC_ADDR((uintptr_t)addr - 9515aefb655Srie (uintptr_t)ofl->ofl_nehdr)); 9525aefb655Srie 9535aefb655Srie if (class == ERR_FATAL) { 9545aefb655Srie return_code = S_ERROR; 9555aefb655Srie continue; 9565aefb655Srie } 9575aefb655Srie } 9585aefb655Srie 9595aefb655Srie /* 9605aefb655Srie * The relocation is additive. Ignore the previous 9615aefb655Srie * symbol value if this local partial symbol is 9625aefb655Srie * expanded. 9635aefb655Srie */ 9645aefb655Srie if (moved) 9655aefb655Srie value -= *addr; 9665aefb655Srie 9675aefb655Srie /* 968*f3324781Sab196087 * If '-z noreloc' is specified - skip the do_reloc_ld 9695aefb655Srie * stage. 9705aefb655Srie */ 971*f3324781Sab196087 if (OFL_DO_RELOC(ofl)) { 972*f3324781Sab196087 /* 973*f3324781Sab196087 * If this is a PROGBITS section and the 974*f3324781Sab196087 * running linker has a different byte order 975*f3324781Sab196087 * than the target host, tell do_reloc_ld() 976*f3324781Sab196087 * to swap bytes. 977*f3324781Sab196087 */ 978*f3324781Sab196087 if (do_reloc_ld((uchar_t)arsp->rel_rtype, 9795aefb655Srie addr, &value, arsp->rel_sname, ifl_name, 980*f3324781Sab196087 OFL_SWAP_RELOC_DATA(ofl, arsp), 9815aefb655Srie ofl->ofl_lml) == 0) 9825aefb655Srie return_code = S_ERROR; 9835aefb655Srie } 9845aefb655Srie } 9855aefb655Srie } 9865aefb655Srie return (return_code); 9875aefb655Srie } 9885aefb655Srie 9895aefb655Srie uintptr_t 9905aefb655Srie ld_add_outrel(Word flags, Rel_desc *rsp, Ofl_desc *ofl) 9915aefb655Srie { 9925aefb655Srie Rel_desc *orsp; 9935aefb655Srie Rel_cache *rcp; 9945aefb655Srie Sym_desc *sdp = rsp->rel_sym; 9955aefb655Srie 9965aefb655Srie /* 9975aefb655Srie * Static executables *do not* want any relocations against them. 9985aefb655Srie * Since our engine still creates relocations against a WEAK UNDEFINED 9995aefb655Srie * symbol in a static executable, it's best to disable them here 10005aefb655Srie * instead of through out the relocation code. 10015aefb655Srie */ 10025aefb655Srie if ((ofl->ofl_flags & (FLG_OF_STATIC | FLG_OF_EXEC)) == 10035aefb655Srie (FLG_OF_STATIC | FLG_OF_EXEC)) 10045aefb655Srie return (1); 10055aefb655Srie 10065aefb655Srie /* 10075aefb655Srie * If no relocation cache structures are available allocate 10085aefb655Srie * a new one and link it into the cache list. 10095aefb655Srie */ 10105aefb655Srie if ((ofl->ofl_outrels.tail == 0) || 10115aefb655Srie ((rcp = (Rel_cache *)ofl->ofl_outrels.tail->data) == 0) || 10125aefb655Srie ((orsp = rcp->rc_free) == rcp->rc_end)) { 10135aefb655Srie static size_t nextsize = 0; 10145aefb655Srie size_t size; 10155aefb655Srie 10165aefb655Srie /* 10175aefb655Srie * Output relocation numbers can vary considerably between 10185aefb655Srie * building executables or shared objects (pic vs. non-pic), 10195aefb655Srie * etc. But, they typically aren't very large, so for these 10205aefb655Srie * objects use a standard bucket size. For building relocatable 10215aefb655Srie * objects, typically there will be an output relocation for 10225aefb655Srie * every input relocation. 10235aefb655Srie */ 10245aefb655Srie if (nextsize == 0) { 10255aefb655Srie if (ofl->ofl_flags & FLG_OF_RELOBJ) { 10265aefb655Srie if ((size = ofl->ofl_relocincnt) == 0) 10275aefb655Srie size = REL_LOIDESCNO; 10285aefb655Srie if (size > REL_HOIDESCNO) 10295aefb655Srie nextsize = REL_HOIDESCNO; 10305aefb655Srie else 10315aefb655Srie nextsize = REL_LOIDESCNO; 10325aefb655Srie } else 10335aefb655Srie nextsize = size = REL_HOIDESCNO; 10345aefb655Srie } else 10355aefb655Srie size = nextsize; 10365aefb655Srie 10375aefb655Srie size = size * sizeof (Rel_desc); 10385aefb655Srie 10395aefb655Srie if (((rcp = libld_malloc(sizeof (Rel_cache) + size)) == 0) || 10405aefb655Srie (list_appendc(&ofl->ofl_outrels, rcp) == 0)) 10415aefb655Srie return (S_ERROR); 10425aefb655Srie 10435aefb655Srie /* LINTED */ 10445aefb655Srie rcp->rc_free = orsp = (Rel_desc *)(rcp + 1); 10455aefb655Srie /* LINTED */ 10465aefb655Srie rcp->rc_end = (Rel_desc *)((char *)rcp->rc_free + size); 10475aefb655Srie } 10485aefb655Srie 10495aefb655Srie /* 10505aefb655Srie * If we are adding a output relocation against a section 10515aefb655Srie * symbol (non-RELATIVE) then mark that section. These sections 10525aefb655Srie * will be added to the .dynsym symbol table. 10535aefb655Srie */ 10545aefb655Srie if (sdp && (rsp->rel_rtype != M_R_RELATIVE) && 10555aefb655Srie ((flags & FLG_REL_SCNNDX) || 10565aefb655Srie (ELF_ST_TYPE(sdp->sd_sym->st_info) == STT_SECTION))) { 10575aefb655Srie 10585aefb655Srie /* 10595aefb655Srie * If this is a COMMON symbol - no output section 10605aefb655Srie * exists yet - (it's created as part of sym_validate()). 10615aefb655Srie * So - we mark here that when it's created it should 10625aefb655Srie * be tagged with the FLG_OS_OUTREL flag. 10635aefb655Srie */ 10645aefb655Srie if ((sdp->sd_flags & FLG_SY_SPECSEC) && 10650bc07c75Srie (sdp->sd_sym->st_shndx == SHN_COMMON)) { 10665aefb655Srie if (ELF_ST_TYPE(sdp->sd_sym->st_info) != STT_TLS) 10675aefb655Srie ofl->ofl_flags1 |= FLG_OF1_BSSOREL; 10685aefb655Srie else 10695aefb655Srie ofl->ofl_flags1 |= FLG_OF1_TLSOREL; 10705aefb655Srie } else { 10715aefb655Srie Os_desc *osp = sdp->sd_isc->is_osdesc; 10725aefb655Srie 1073c1c6f601Srie if (osp && ((osp->os_flags & FLG_OS_OUTREL) == 0)) { 10745aefb655Srie ofl->ofl_dynshdrcnt++; 10755aefb655Srie osp->os_flags |= FLG_OS_OUTREL; 10765aefb655Srie } 10775aefb655Srie } 10785aefb655Srie } 10795aefb655Srie 10805aefb655Srie *orsp = *rsp; 10815aefb655Srie orsp->rel_flags |= flags; 10825aefb655Srie 10835aefb655Srie rcp->rc_free++; 10845aefb655Srie ofl->ofl_outrelscnt++; 10855aefb655Srie 10865aefb655Srie if (flags & FLG_REL_GOT) 10875aefb655Srie ofl->ofl_relocgotsz += (Xword)sizeof (Rela); 10885aefb655Srie else if (flags & FLG_REL_PLT) 10895aefb655Srie ofl->ofl_relocpltsz += (Xword)sizeof (Rela); 10905aefb655Srie else if (flags & FLG_REL_BSS) 10915aefb655Srie ofl->ofl_relocbsssz += (Xword)sizeof (Rela); 10925aefb655Srie else if (flags & FLG_REL_NOINFO) 10935aefb655Srie ofl->ofl_relocrelsz += (Xword)sizeof (Rela); 10945aefb655Srie else 10955aefb655Srie orsp->rel_osdesc->os_szoutrels += (Xword)sizeof (Rela); 10965aefb655Srie 10975aefb655Srie if (orsp->rel_rtype == M_R_RELATIVE) 10985aefb655Srie ofl->ofl_relocrelcnt++; 10995aefb655Srie 11005aefb655Srie /* 11015aefb655Srie * We don't perform sorting on PLT relocations because 11025aefb655Srie * they have already been assigned a PLT index and if we 11035aefb655Srie * were to sort them we would have to re-assign the plt indexes. 11045aefb655Srie */ 11055aefb655Srie if (!(flags & FLG_REL_PLT)) 11065aefb655Srie ofl->ofl_reloccnt++; 11075aefb655Srie 11085aefb655Srie /* 11095aefb655Srie * Insure a GLOBAL_OFFSET_TABLE is generated if required. 11105aefb655Srie */ 11115aefb655Srie if (IS_GOT_REQUIRED(orsp->rel_rtype)) 11125aefb655Srie ofl->ofl_flags |= FLG_OF_BLDGOT; 11135aefb655Srie 11145aefb655Srie /* 11155aefb655Srie * Identify and possibly warn of a displacement relocation. 11165aefb655Srie */ 11175aefb655Srie if (orsp->rel_flags & FLG_REL_DISP) { 11185aefb655Srie ofl->ofl_dtflags_1 |= DF_1_DISPRELPND; 11195aefb655Srie 11205aefb655Srie if (ofl->ofl_flags & FLG_OF_VERBOSE) 11215aefb655Srie ld_disp_errmsg(MSG_INTL(MSG_REL_DISPREL4), orsp, ofl); 11225aefb655Srie } 11235aefb655Srie DBG_CALL(Dbg_reloc_ors_entry(ofl->ofl_lml, ELF_DBG_LD, SHT_RELA, 11245aefb655Srie M_MACH, orsp)); 11255aefb655Srie return (1); 11265aefb655Srie } 11275aefb655Srie 11285aefb655Srie /* 11295aefb655Srie * Stub routine since register symbols are not supported on amd64. 11305aefb655Srie */ 11315aefb655Srie /* ARGSUSED */ 11325aefb655Srie uintptr_t 11335aefb655Srie ld_reloc_register(Rel_desc * rsp, Is_desc * isp, Ofl_desc * ofl) 11345aefb655Srie { 11355aefb655Srie eprintf(ofl->ofl_lml, ERR_FATAL, MSG_INTL(MSG_REL_NOREG)); 11365aefb655Srie return (S_ERROR); 11375aefb655Srie } 11385aefb655Srie 11395aefb655Srie /* 11405aefb655Srie * process relocation for a LOCAL symbol 11415aefb655Srie */ 11425aefb655Srie uintptr_t 11435aefb655Srie ld_reloc_local(Rel_desc * rsp, Ofl_desc * ofl) 11445aefb655Srie { 11455aefb655Srie Word flags = ofl->ofl_flags; 11465aefb655Srie Sym_desc *sdp = rsp->rel_sym; 11470bc07c75Srie Word shndx = sdp->sd_sym->st_shndx; 11485aefb655Srie Word ortype = rsp->rel_rtype; 11495aefb655Srie 11505aefb655Srie /* 11515aefb655Srie * if ((shared object) and (not pc relative relocation) and 11525aefb655Srie * (not against ABS symbol)) 11535aefb655Srie * then 11545aefb655Srie * build R_AMD64_RELATIVE 11555aefb655Srie * fi 11565aefb655Srie */ 11575aefb655Srie if ((flags & FLG_OF_SHAROBJ) && (rsp->rel_flags & FLG_REL_LOAD) && 11582926dd2eSrie !(IS_PC_RELATIVE(rsp->rel_rtype)) && !(IS_SIZE(rsp->rel_rtype)) && 11595aefb655Srie !(IS_GOT_BASED(rsp->rel_rtype)) && 11605aefb655Srie !(rsp->rel_isdesc != NULL && 11615aefb655Srie (rsp->rel_isdesc->is_shdr->sh_type == SHT_SUNW_dof)) && 11625aefb655Srie (((sdp->sd_flags & FLG_SY_SPECSEC) == 0) || 11635aefb655Srie (shndx != SHN_ABS) || (sdp->sd_aux && sdp->sd_aux->sa_symspec))) { 11645aefb655Srie 11655aefb655Srie /* 11665aefb655Srie * R_AMD64_RELATIVE updates a 64bit address, if this 11675aefb655Srie * relocation isn't a 64bit binding then we can not 11685aefb655Srie * simplify it to a RELATIVE relocation. 11695aefb655Srie */ 11705aefb655Srie if (reloc_table[ortype].re_fsize != sizeof (Addr)) { 11715aefb655Srie return (ld_add_outrel(NULL, rsp, ofl)); 11725aefb655Srie } 11735aefb655Srie 11745aefb655Srie rsp->rel_rtype = R_AMD64_RELATIVE; 11755aefb655Srie if (ld_add_outrel(FLG_REL_ADVAL, rsp, ofl) == S_ERROR) 11765aefb655Srie return (S_ERROR); 11775aefb655Srie rsp->rel_rtype = ortype; 11785aefb655Srie return (1); 11795aefb655Srie } 11805aefb655Srie 11815aefb655Srie /* 11825aefb655Srie * If the relocation is against a 'non-allocatable' section 11835aefb655Srie * and we can not resolve it now - then give a warning 11845aefb655Srie * message. 11855aefb655Srie * 11865aefb655Srie * We can not resolve the symbol if either: 11875aefb655Srie * a) it's undefined 11885aefb655Srie * b) it's defined in a shared library and a 11895aefb655Srie * COPY relocation hasn't moved it to the executable 11905aefb655Srie * 11915aefb655Srie * Note: because we process all of the relocations against the 11925aefb655Srie * text segment before any others - we know whether 11935aefb655Srie * or not a copy relocation will be generated before 11945aefb655Srie * we get here (see reloc_init()->reloc_segments()). 11955aefb655Srie */ 11965aefb655Srie if (!(rsp->rel_flags & FLG_REL_LOAD) && 11975aefb655Srie ((shndx == SHN_UNDEF) || 11985aefb655Srie ((sdp->sd_ref == REF_DYN_NEED) && 11995aefb655Srie ((sdp->sd_flags & FLG_SY_MVTOCOMM) == 0)))) { 1200de777a60Sab196087 Conv_inv_buf_t inv_buf; 1201de777a60Sab196087 12025aefb655Srie /* 12035aefb655Srie * If the relocation is against a SHT_SUNW_ANNOTATE 12045aefb655Srie * section - then silently ignore that the relocation 12055aefb655Srie * can not be resolved. 12065aefb655Srie */ 12075aefb655Srie if (rsp->rel_osdesc && 12085aefb655Srie (rsp->rel_osdesc->os_shdr->sh_type == SHT_SUNW_ANNOTATE)) 12095aefb655Srie return (0); 12105aefb655Srie (void) eprintf(ofl->ofl_lml, ERR_WARNING, 12115aefb655Srie MSG_INTL(MSG_REL_EXTERNSYM), 1212de777a60Sab196087 conv_reloc_amd64_type(rsp->rel_rtype, 0, &inv_buf), 12135aefb655Srie rsp->rel_isdesc->is_file->ifl_name, 12145aefb655Srie demangle(rsp->rel_sname), rsp->rel_osdesc->os_name); 12155aefb655Srie return (1); 12165aefb655Srie } 12175aefb655Srie 12185aefb655Srie /* 12195aefb655Srie * Perform relocation. 12205aefb655Srie */ 12215aefb655Srie return (ld_add_actrel(NULL, rsp, ofl)); 12225aefb655Srie } 12235aefb655Srie 12245aefb655Srie 12255aefb655Srie uintptr_t 12265aefb655Srie /* ARGSUSED */ 12275aefb655Srie ld_reloc_GOTOP(Boolean local, Rel_desc * rsp, Ofl_desc * ofl) 12285aefb655Srie { 12295aefb655Srie /* 12305aefb655Srie * Stub routine for common code compatibility, we shouldn't 12315aefb655Srie * actually get here on amd64. 12325aefb655Srie */ 1233d326b23bSrie assert(0); 12345aefb655Srie return (S_ERROR); 12355aefb655Srie } 12365aefb655Srie 12375aefb655Srie uintptr_t 12385aefb655Srie ld_reloc_TLS(Boolean local, Rel_desc * rsp, Ofl_desc * ofl) 12395aefb655Srie { 12405aefb655Srie Word rtype = rsp->rel_rtype; 12415aefb655Srie Sym_desc *sdp = rsp->rel_sym; 12425aefb655Srie Word flags = ofl->ofl_flags; 12435aefb655Srie Gotndx *gnp; 12445aefb655Srie 12455aefb655Srie /* 1246d326b23bSrie * If we're building an executable - use either the IE or LE access 1247d326b23bSrie * model. If we're building a shared object process any IE model. 12485aefb655Srie */ 1249d326b23bSrie if ((flags & FLG_OF_EXEC) || (IS_TLS_IE(rtype))) { 12505aefb655Srie /* 1251d326b23bSrie * Set the DF_STATIC_TLS flag. 12525aefb655Srie */ 12535aefb655Srie ofl->ofl_dtflags |= DF_STATIC_TLS; 12545aefb655Srie 1255d326b23bSrie if (!local || ((flags & FLG_OF_EXEC) == 0)) { 12565aefb655Srie /* 1257d326b23bSrie * Assign a GOT entry for static TLS references. 12585aefb655Srie */ 12595aefb655Srie if ((gnp = ld_find_gotndx(&(sdp->sd_GOTndxs), 1260d326b23bSrie GOT_REF_TLSIE, ofl, rsp)) == 0) { 1261d326b23bSrie 1262d326b23bSrie if (ld_assign_got_TLS(local, rsp, ofl, sdp, 1263d326b23bSrie gnp, GOT_REF_TLSIE, FLG_REL_STLS, 1264d326b23bSrie rtype, R_AMD64_TPOFF64, 0) == S_ERROR) 12655aefb655Srie return (S_ERROR); 12665aefb655Srie } 1267d326b23bSrie 1268d326b23bSrie /* 1269d326b23bSrie * IE access model. 1270d326b23bSrie */ 12715aefb655Srie if (IS_TLS_IE(rtype)) 12725aefb655Srie return (ld_add_actrel(FLG_REL_STLS, rsp, ofl)); 12735aefb655Srie 12745aefb655Srie /* 1275d326b23bSrie * Fixups are required for other executable models. 12765aefb655Srie */ 12775aefb655Srie return (ld_add_actrel((FLG_REL_TLSFIX | FLG_REL_STLS), 12785aefb655Srie rsp, ofl)); 12795aefb655Srie } 1280d326b23bSrie 12815aefb655Srie /* 1282d326b23bSrie * LE access model. 12835aefb655Srie */ 12845aefb655Srie if (IS_TLS_LE(rtype)) 12855aefb655Srie return (ld_add_actrel(FLG_REL_STLS, rsp, ofl)); 1286d326b23bSrie 12875aefb655Srie return (ld_add_actrel((FLG_REL_TLSFIX | FLG_REL_STLS), 12885aefb655Srie rsp, ofl)); 12895aefb655Srie } 12905aefb655Srie 12915aefb655Srie /* 1292d326b23bSrie * Building a shared object. 1293d326b23bSrie * 1294d326b23bSrie * Assign a GOT entry for a dynamic TLS reference. 12955aefb655Srie */ 12965aefb655Srie if (IS_TLS_LD(rtype) && ((gnp = ld_find_gotndx(&(sdp->sd_GOTndxs), 12975aefb655Srie GOT_REF_TLSLD, ofl, rsp)) == 0)) { 1298d326b23bSrie 1299d326b23bSrie if (ld_assign_got_TLS(local, rsp, ofl, sdp, gnp, GOT_REF_TLSLD, 1300d326b23bSrie FLG_REL_MTLS, rtype, R_AMD64_DTPMOD64, 0) == S_ERROR) 13015aefb655Srie return (S_ERROR); 1302d326b23bSrie 13035aefb655Srie } else if (IS_TLS_GD(rtype) && 1304d326b23bSrie ((gnp = ld_find_gotndx(&(sdp->sd_GOTndxs), GOT_REF_TLSGD, 1305d326b23bSrie ofl, rsp)) == 0)) { 1306d326b23bSrie 1307d326b23bSrie if (ld_assign_got_TLS(local, rsp, ofl, sdp, gnp, GOT_REF_TLSGD, 1308d326b23bSrie FLG_REL_DTLS, rtype, R_AMD64_DTPMOD64, 1309d326b23bSrie R_AMD64_DTPOFF64) == S_ERROR) 13105aefb655Srie return (S_ERROR); 13115aefb655Srie } 13125aefb655Srie 13135aefb655Srie if (IS_TLS_LD(rtype)) 13145aefb655Srie return (ld_add_actrel(FLG_REL_MTLS, rsp, ofl)); 13155aefb655Srie 13165aefb655Srie return (ld_add_actrel(FLG_REL_DTLS, rsp, ofl)); 13175aefb655Srie } 13185aefb655Srie 13195aefb655Srie /* ARGSUSED3 */ 13205aefb655Srie Gotndx * 13215aefb655Srie ld_find_gotndx(List * lst, Gotref gref, Ofl_desc * ofl, Rel_desc * rdesc) 13225aefb655Srie { 13235aefb655Srie Listnode * lnp; 13245aefb655Srie Gotndx * gnp; 13255aefb655Srie 13265aefb655Srie assert(rdesc != 0); 13275aefb655Srie 13285aefb655Srie if ((gref == GOT_REF_TLSLD) && ofl->ofl_tlsldgotndx) 13295aefb655Srie return (ofl->ofl_tlsldgotndx); 13305aefb655Srie 13315aefb655Srie for (LIST_TRAVERSE(lst, lnp, gnp)) { 13325aefb655Srie if ((rdesc->rel_raddend == gnp->gn_addend) && 13335aefb655Srie (gnp->gn_gotref == gref)) { 13345aefb655Srie return (gnp); 13355aefb655Srie } 13365aefb655Srie } 13375aefb655Srie return ((Gotndx *)0); 13385aefb655Srie } 13395aefb655Srie 13405aefb655Srie Xword 13415aefb655Srie ld_calc_got_offset(Rel_desc * rdesc, Ofl_desc * ofl) 13425aefb655Srie { 13435aefb655Srie Os_desc *osp = ofl->ofl_osgot; 13445aefb655Srie Sym_desc *sdp = rdesc->rel_sym; 13455aefb655Srie Xword gotndx; 13465aefb655Srie Gotref gref; 13475aefb655Srie Gotndx *gnp; 13485aefb655Srie 13495aefb655Srie if (rdesc->rel_flags & FLG_REL_DTLS) 13505aefb655Srie gref = GOT_REF_TLSGD; 13515aefb655Srie else if (rdesc->rel_flags & FLG_REL_MTLS) 13525aefb655Srie gref = GOT_REF_TLSLD; 13535aefb655Srie else if (rdesc->rel_flags & FLG_REL_STLS) 13545aefb655Srie gref = GOT_REF_TLSIE; 13555aefb655Srie else 13565aefb655Srie gref = GOT_REF_GENERIC; 13575aefb655Srie 13585aefb655Srie gnp = ld_find_gotndx(&(sdp->sd_GOTndxs), gref, ofl, rdesc); 13595aefb655Srie assert(gnp); 13605aefb655Srie 13615aefb655Srie gotndx = (Xword)gnp->gn_gotndx; 13625aefb655Srie 13635aefb655Srie if ((rdesc->rel_flags & FLG_REL_DTLS) && 13645aefb655Srie (rdesc->rel_rtype == R_AMD64_DTPOFF64)) 13655aefb655Srie gotndx++; 13665aefb655Srie 13675aefb655Srie return ((Xword)(osp->os_shdr->sh_addr + (gotndx * M_GOT_ENTSIZE))); 13685aefb655Srie } 13695aefb655Srie 13705aefb655Srie 13715aefb655Srie /* ARGSUSED5 */ 13725aefb655Srie uintptr_t 1373d326b23bSrie ld_assign_got_ndx(List * lst, Gotndx * pgnp, Gotref gref, Ofl_desc * ofl, 13745aefb655Srie Rel_desc * rsp, Sym_desc * sdp) 13755aefb655Srie { 13765aefb655Srie Xword raddend; 13775aefb655Srie Gotndx *gnp, *_gnp; 13785aefb655Srie Listnode *lnp, *plnp; 13795aefb655Srie uint_t gotents; 13805aefb655Srie 13815aefb655Srie raddend = rsp->rel_raddend; 13825aefb655Srie if (pgnp && (pgnp->gn_addend == raddend) && 13835aefb655Srie (pgnp->gn_gotref == gref)) 13845aefb655Srie return (1); 13855aefb655Srie 13865aefb655Srie if ((gref == GOT_REF_TLSGD) || (gref == GOT_REF_TLSLD)) 13875aefb655Srie gotents = 2; 13885aefb655Srie else 13895aefb655Srie gotents = 1; 13905aefb655Srie 13915aefb655Srie plnp = 0; 13925aefb655Srie for (LIST_TRAVERSE(lst, lnp, _gnp)) { 13935aefb655Srie if (_gnp->gn_addend > raddend) 13945aefb655Srie break; 13955aefb655Srie plnp = lnp; 13965aefb655Srie } 13975aefb655Srie 13985aefb655Srie /* 13995aefb655Srie * Allocate a new entry. 14005aefb655Srie */ 14015aefb655Srie if ((gnp = libld_calloc(sizeof (Gotndx), 1)) == 0) 14025aefb655Srie return (S_ERROR); 14035aefb655Srie gnp->gn_addend = raddend; 14045aefb655Srie gnp->gn_gotndx = ofl->ofl_gotcnt; 14055aefb655Srie gnp->gn_gotref = gref; 14065aefb655Srie 14075aefb655Srie ofl->ofl_gotcnt += gotents; 14085aefb655Srie 14095aefb655Srie if (gref == GOT_REF_TLSLD) { 14105aefb655Srie ofl->ofl_tlsldgotndx = gnp; 14115aefb655Srie return (1); 14125aefb655Srie } 14135aefb655Srie 14145aefb655Srie if (plnp == 0) { 14155aefb655Srie /* 14165aefb655Srie * Insert at head of list 14175aefb655Srie */ 14185aefb655Srie if (list_prependc(lst, (void *)gnp) == 0) 14195aefb655Srie return (S_ERROR); 14205aefb655Srie } else if (_gnp->gn_addend > raddend) { 14215aefb655Srie /* 14225aefb655Srie * Insert in middle of lest 14235aefb655Srie */ 14245aefb655Srie if (list_insertc(lst, (void *)gnp, plnp) == 0) 14255aefb655Srie return (S_ERROR); 14265aefb655Srie } else { 14275aefb655Srie /* 14285aefb655Srie * Append to tail of list 14295aefb655Srie */ 14305aefb655Srie if (list_appendc(lst, (void *)gnp) == 0) 14315aefb655Srie return (S_ERROR); 14325aefb655Srie } 14335aefb655Srie return (1); 14345aefb655Srie } 14355aefb655Srie 14365aefb655Srie void 14375aefb655Srie ld_assign_plt_ndx(Sym_desc * sdp, Ofl_desc *ofl) 14385aefb655Srie { 14395aefb655Srie sdp->sd_aux->sa_PLTndx = 1 + ofl->ofl_pltcnt++; 14405aefb655Srie sdp->sd_aux->sa_PLTGOTndx = ofl->ofl_gotcnt++; 14415aefb655Srie ofl->ofl_flags |= FLG_OF_BLDGOT; 14425aefb655Srie } 14435aefb655Srie 14445aefb655Srie static uchar_t plt0_template[M_PLT_ENTSIZE] = { 14455aefb655Srie /* 0x00 PUSHQ GOT+8(%rip) */ 0xff, 0x35, 0x00, 0x00, 0x00, 0x00, 14465aefb655Srie /* 0x06 JMP *GOT+16(%rip) */ 0xff, 0x25, 0x00, 0x00, 0x00, 0x00, 14475aefb655Srie /* 0x0c NOP */ 0x90, 14485aefb655Srie /* 0x0d NOP */ 0x90, 14495aefb655Srie /* 0x0e NOP */ 0x90, 14505aefb655Srie /* 0x0f NOP */ 0x90 14515aefb655Srie }; 14525aefb655Srie 14535aefb655Srie /* 14545aefb655Srie * Initializes .got[0] with the _DYNAMIC symbol value. 14555aefb655Srie */ 14565aefb655Srie uintptr_t 14575aefb655Srie ld_fillin_gotplt(Ofl_desc *ofl) 14585aefb655Srie { 14595aefb655Srie if (ofl->ofl_osgot) { 14605aefb655Srie Sym_desc *sdp; 14615aefb655Srie 14625aefb655Srie if ((sdp = ld_sym_find(MSG_ORIG(MSG_SYM_DYNAMIC_U), 14635aefb655Srie SYM_NOHASH, 0, ofl)) != NULL) { 1464d326b23bSrie uchar_t *genptr; 1465d326b23bSrie 1466d326b23bSrie genptr = ((uchar_t *)ofl->ofl_osgot->os_outdata->d_buf + 14675aefb655Srie (M_GOT_XDYNAMIC * M_GOT_ENTSIZE)); 14685aefb655Srie /* LINTED */ 14695aefb655Srie *(Xword *)genptr = sdp->sd_sym->st_value; 14705aefb655Srie } 14715aefb655Srie } 14725aefb655Srie 14735aefb655Srie /* 14745aefb655Srie * Fill in the reserved slot in the procedure linkage table the first 14755aefb655Srie * entry is: 14765aefb655Srie * 0x00 PUSHQ GOT+8(%rip) # GOT[1] 14775aefb655Srie * 0x06 JMP *GOT+16(%rip) # GOT[2] 14785aefb655Srie * 0x0c NOP 14795aefb655Srie * 0x0d NOP 14805aefb655Srie * 0x0e NOP 14815aefb655Srie * 0x0f NOP 14825aefb655Srie */ 1483*f3324781Sab196087 if ((ofl->ofl_flags & FLG_OF_DYNAMIC) && ofl->ofl_osplt) { 14845aefb655Srie uchar_t *pltent; 14855aefb655Srie Xword val1; 1486*f3324781Sab196087 int bswap; 14875aefb655Srie 14885aefb655Srie pltent = (uchar_t *)ofl->ofl_osplt->os_outdata->d_buf; 14895aefb655Srie bcopy(plt0_template, pltent, sizeof (plt0_template)); 14905aefb655Srie 14915aefb655Srie /* 1492*f3324781Sab196087 * If '-z noreloc' is specified - skip the do_reloc_ld 1493*f3324781Sab196087 * stage. 1494*f3324781Sab196087 */ 1495*f3324781Sab196087 if (!OFL_DO_RELOC(ofl)) 1496*f3324781Sab196087 return (1); 1497*f3324781Sab196087 1498*f3324781Sab196087 /* 1499*f3324781Sab196087 * If the running linker has a different byte order than 1500*f3324781Sab196087 * the target host, tell do_reloc_ld() to swap bytes. 1501*f3324781Sab196087 * 1502*f3324781Sab196087 * We know the GOT is PROGBITS --- we don't have 1503*f3324781Sab196087 * to check. 1504*f3324781Sab196087 */ 1505*f3324781Sab196087 bswap = (ofl->ofl_flags1 & FLG_OF1_ENCDIFF) != 0; 1506*f3324781Sab196087 1507*f3324781Sab196087 /* 15085aefb655Srie * filin: 15095aefb655Srie * PUSHQ GOT + 8(%rip) 15105aefb655Srie * 15115aefb655Srie * Note: 0x06 below represents the offset to the 15125aefb655Srie * next instruction - which is what %rip will 15135aefb655Srie * be pointing at. 15145aefb655Srie */ 15155aefb655Srie val1 = (ofl->ofl_osgot->os_shdr->sh_addr) + 15165aefb655Srie (M_GOT_XLINKMAP * M_GOT_ENTSIZE) - 15175aefb655Srie ofl->ofl_osplt->os_shdr->sh_addr - 0x06; 15185aefb655Srie 1519*f3324781Sab196087 if (do_reloc_ld(R_AMD64_GOTPCREL, &pltent[0x02], 15205aefb655Srie &val1, MSG_ORIG(MSG_SYM_PLTENT), 1521*f3324781Sab196087 MSG_ORIG(MSG_SPECFIL_PLTENT), bswap, ofl->ofl_lml) == 0) { 15225aefb655Srie eprintf(ofl->ofl_lml, ERR_FATAL, 15235aefb655Srie MSG_INTL(MSG_PLT_PLT0FAIL)); 15245aefb655Srie return (S_ERROR); 15255aefb655Srie } 15265aefb655Srie 15275aefb655Srie /* 15285aefb655Srie * filin: 15295aefb655Srie * JMP *GOT+16(%rip) 15305aefb655Srie */ 15315aefb655Srie val1 = (ofl->ofl_osgot->os_shdr->sh_addr) + 15325aefb655Srie (M_GOT_XRTLD * M_GOT_ENTSIZE) - 15335aefb655Srie ofl->ofl_osplt->os_shdr->sh_addr - 0x0c; 1534*f3324781Sab196087 1535*f3324781Sab196087 if (do_reloc_ld(R_AMD64_GOTPCREL, &pltent[0x08], 15365aefb655Srie &val1, MSG_ORIG(MSG_SYM_PLTENT), 1537*f3324781Sab196087 MSG_ORIG(MSG_SPECFIL_PLTENT), bswap, ofl->ofl_lml) == 0) { 15385aefb655Srie eprintf(ofl->ofl_lml, ERR_FATAL, 15395aefb655Srie MSG_INTL(MSG_PLT_PLT0FAIL)); 15405aefb655Srie return (S_ERROR); 15415aefb655Srie } 15425aefb655Srie } 1543*f3324781Sab196087 15445aefb655Srie return (1); 15455aefb655Srie } 1546