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 */ 215aefb655Srie 227c478bd9Sstevel@tonic-gate /* 237c478bd9Sstevel@tonic-gate * Copyright (c) 1988 AT&T 247c478bd9Sstevel@tonic-gate * All Rights Reserved 257c478bd9Sstevel@tonic-gate * 267c478bd9Sstevel@tonic-gate * 27d4517e84Srie * Copyright 2008 Sun Microsystems, Inc. All rights reserved. 287c478bd9Sstevel@tonic-gate * Use is subject to license terms. 297c478bd9Sstevel@tonic-gate */ 307c478bd9Sstevel@tonic-gate #pragma ident "%Z%%M% %I% %E% SMI" 317c478bd9Sstevel@tonic-gate 327c478bd9Sstevel@tonic-gate /* 337c478bd9Sstevel@tonic-gate * Symbol table management routines 347c478bd9Sstevel@tonic-gate */ 35*ba2be530Sab 36*ba2be530Sab #define ELF_TARGET_AMD64 37*ba2be530Sab 387c478bd9Sstevel@tonic-gate #include <stdio.h> 397c478bd9Sstevel@tonic-gate #include <string.h> 405aefb655Srie #include <debug.h> 417c478bd9Sstevel@tonic-gate #include "msg.h" 427c478bd9Sstevel@tonic-gate #include "_libld.h" 437c478bd9Sstevel@tonic-gate 447c478bd9Sstevel@tonic-gate /* 457c478bd9Sstevel@tonic-gate * AVL tree comparator function: 467c478bd9Sstevel@tonic-gate * 477c478bd9Sstevel@tonic-gate * The primary key is the 'sa_hashval' with a secondary 487c478bd9Sstevel@tonic-gate * key of the symbol name itself. 497c478bd9Sstevel@tonic-gate */ 507c478bd9Sstevel@tonic-gate int 515aefb655Srie ld_sym_avl_comp(const void *elem1, const void *elem2) 527c478bd9Sstevel@tonic-gate { 537c478bd9Sstevel@tonic-gate int res; 547c478bd9Sstevel@tonic-gate Sym_avlnode *sav1 = (Sym_avlnode *)elem1; 557c478bd9Sstevel@tonic-gate Sym_avlnode *sav2 = (Sym_avlnode *)elem2; 567c478bd9Sstevel@tonic-gate 577c478bd9Sstevel@tonic-gate res = sav1->sav_hash - sav2->sav_hash; 587c478bd9Sstevel@tonic-gate 597c478bd9Sstevel@tonic-gate if (res < 0) 607c478bd9Sstevel@tonic-gate return (-1); 617c478bd9Sstevel@tonic-gate if (res > 0) 627c478bd9Sstevel@tonic-gate return (1); 637c478bd9Sstevel@tonic-gate 647c478bd9Sstevel@tonic-gate /* 657c478bd9Sstevel@tonic-gate * Hash is equal - now compare name 667c478bd9Sstevel@tonic-gate */ 677c478bd9Sstevel@tonic-gate res = strcmp(sav1->sav_name, sav2->sav_name); 687c478bd9Sstevel@tonic-gate if (res == 0) 697c478bd9Sstevel@tonic-gate return (0); 707c478bd9Sstevel@tonic-gate if (res > 0) 717c478bd9Sstevel@tonic-gate return (1); 727c478bd9Sstevel@tonic-gate return (-1); 737c478bd9Sstevel@tonic-gate } 747c478bd9Sstevel@tonic-gate 757c478bd9Sstevel@tonic-gate 767c478bd9Sstevel@tonic-gate /* 777c478bd9Sstevel@tonic-gate * Focal point for verifying symbol names. 787c478bd9Sstevel@tonic-gate */ 79a194faf8Srie inline static const char * 805aefb655Srie string(Ofl_desc *ofl, Ifl_desc *ifl, Sym *sym, const char *strs, size_t strsize, 815aefb655Srie int symndx, Word shndx, const char *symsecname, const char *strsecname, 825aefb655Srie Word *flags) 837c478bd9Sstevel@tonic-gate { 847c478bd9Sstevel@tonic-gate Word name = sym->st_name; 857c478bd9Sstevel@tonic-gate 867c478bd9Sstevel@tonic-gate if (name) { 877c478bd9Sstevel@tonic-gate if ((ifl->ifl_flags & FLG_IF_HSTRTAB) == 0) { 885aefb655Srie eprintf(ofl->ofl_lml, ERR_FATAL, 895aefb655Srie MSG_INTL(MSG_FIL_NOSTRTABLE), ifl->ifl_name, 905aefb655Srie symsecname, symndx, EC_XWORD(name)); 917c478bd9Sstevel@tonic-gate return (0); 927c478bd9Sstevel@tonic-gate } 937c478bd9Sstevel@tonic-gate if (name >= (Word)strsize) { 945aefb655Srie eprintf(ofl->ofl_lml, ERR_FATAL, 955aefb655Srie MSG_INTL(MSG_FIL_EXCSTRTABLE), ifl->ifl_name, 965aefb655Srie symsecname, symndx, EC_XWORD(name), 977c478bd9Sstevel@tonic-gate strsecname, EC_XWORD(strsize)); 987c478bd9Sstevel@tonic-gate return (0); 997c478bd9Sstevel@tonic-gate } 1007c478bd9Sstevel@tonic-gate } 1017c478bd9Sstevel@tonic-gate 1027c478bd9Sstevel@tonic-gate /* 1037c478bd9Sstevel@tonic-gate * Determine if we're dealing with a register and if so validate it. 1047c478bd9Sstevel@tonic-gate * If it's a scratch register, a fabricated name will be returned. 1057c478bd9Sstevel@tonic-gate */ 106*ba2be530Sab if (ld_targ.t_ms.ms_is_regsym != NULL) { 107*ba2be530Sab const char *regname = (*ld_targ.t_ms.ms_is_regsym)(ofl, ifl, 108*ba2be530Sab sym, strs, symndx, shndx, symsecname, flags); 109*ba2be530Sab 110*ba2be530Sab if (regname == (const char *)S_ERROR) { 111*ba2be530Sab return (0); 112*ba2be530Sab } 113*ba2be530Sab if (regname) 114*ba2be530Sab return (regname); 1157c478bd9Sstevel@tonic-gate } 1167c478bd9Sstevel@tonic-gate 1177c478bd9Sstevel@tonic-gate /* 1187c478bd9Sstevel@tonic-gate * If this isn't a register, but we have a global symbol with a null 1197c478bd9Sstevel@tonic-gate * name, we're not going to be able to hash this, search for it, or 1207c478bd9Sstevel@tonic-gate * do anything interesting. However, we've been accepting a symbol of 1217c478bd9Sstevel@tonic-gate * this kind for ages now, so give the user a warning (rather than a 1227c478bd9Sstevel@tonic-gate * fatal error), just in case this instance exists somewhere in the 1237c478bd9Sstevel@tonic-gate * world and hasn't, as yet, been a problem. 1247c478bd9Sstevel@tonic-gate */ 1257c478bd9Sstevel@tonic-gate if ((name == 0) && (ELF_ST_BIND(sym->st_info) != STB_LOCAL)) { 1265aefb655Srie eprintf(ofl->ofl_lml, ERR_WARNING, MSG_INTL(MSG_FIL_NONAMESYM), 1277c478bd9Sstevel@tonic-gate ifl->ifl_name, symsecname, symndx, EC_XWORD(name)); 1287c478bd9Sstevel@tonic-gate } 1297c478bd9Sstevel@tonic-gate return (strs + name); 1307c478bd9Sstevel@tonic-gate } 1317c478bd9Sstevel@tonic-gate 132*ba2be530Sab 133*ba2be530Sab /* 134*ba2be530Sab * For producing symbol names strings to use in error messages. 135*ba2be530Sab * If the symbol has a non-null name, then the string returned by 136*ba2be530Sab * this function is the output from demangle(), surrounded by 137*ba2be530Sab * single quotes. For null names, a descriptive string giving 138*ba2be530Sab * the symbol section and index is generated. 139*ba2be530Sab * 140*ba2be530Sab * This function uses an internal static buffer to hold the resulting 141*ba2be530Sab * string. The value returned is usable by the caller until the next 142*ba2be530Sab * call, at which point it is overwritten. 143*ba2be530Sab */ 144*ba2be530Sab static const char * 145*ba2be530Sab demangle_symname(const char *name, const char *symtab_name, Word symndx) 146*ba2be530Sab { 147*ba2be530Sab #define INIT_BUFSIZE 256 148*ba2be530Sab 149*ba2be530Sab static char *buf; 150*ba2be530Sab static size_t bufsize = 0; 151*ba2be530Sab 152*ba2be530Sab size_t len; 153*ba2be530Sab int use_name; 154*ba2be530Sab 155*ba2be530Sab 156*ba2be530Sab use_name = (name != NULL) && (*name != '\0'); 157*ba2be530Sab 158*ba2be530Sab if (use_name) { 159*ba2be530Sab name = demangle(name); 160*ba2be530Sab len = strlen(name) + 2; /* Include room for quotes */ 161*ba2be530Sab } else { 162*ba2be530Sab name = MSG_ORIG(MSG_STR_EMPTY); 163*ba2be530Sab len = strlen(symtab_name) + 2 + CONV32_INV_BUFSIZE; 164*ba2be530Sab } 165*ba2be530Sab len++; /* Null termination */ 166*ba2be530Sab 167*ba2be530Sab /* If our buffer is too small, double it until it is big enough */ 168*ba2be530Sab if (len > bufsize) { 169*ba2be530Sab size_t new_bufsize = bufsize; 170*ba2be530Sab char *new_buf; 171*ba2be530Sab 172*ba2be530Sab if (new_bufsize == 0) 173*ba2be530Sab new_bufsize = INIT_BUFSIZE; 174*ba2be530Sab while (len > new_bufsize) 175*ba2be530Sab new_bufsize *= 2; 176*ba2be530Sab new_buf = libld_malloc(new_bufsize); 177*ba2be530Sab if (new_buf == NULL) 178*ba2be530Sab return (name); 179*ba2be530Sab buf = new_buf; 180*ba2be530Sab bufsize = new_bufsize; 181*ba2be530Sab } 182*ba2be530Sab 183*ba2be530Sab if (use_name) { 184*ba2be530Sab (void) snprintf(buf, bufsize, MSG_ORIG(MSG_FMT_SYMNAM), name); 185*ba2be530Sab } else { 186*ba2be530Sab (void) snprintf(buf, bufsize, MSG_ORIG(MSG_FMT_NULLSYMNAM), 187*ba2be530Sab symtab_name, EC_WORD(symndx)); 188*ba2be530Sab } 189*ba2be530Sab 190*ba2be530Sab return (buf); 191*ba2be530Sab 192*ba2be530Sab #undef INIT_BUFSIZE 193*ba2be530Sab } 194*ba2be530Sab 1957c478bd9Sstevel@tonic-gate /* 1967c478bd9Sstevel@tonic-gate * Shared objects can be built that define specific symbols that can not be 1977c478bd9Sstevel@tonic-gate * directly bound to. These objects have a syminfo section (and an associated 1987c478bd9Sstevel@tonic-gate * DF_1_NODIRECT dynamic flags entry). Scan this table looking for symbols 1997c478bd9Sstevel@tonic-gate * that can't be bound to directly, and if this files symbol is presently 2007c478bd9Sstevel@tonic-gate * referenced, mark it so that we don't directly bind to it. 2017c478bd9Sstevel@tonic-gate */ 2027c478bd9Sstevel@tonic-gate uintptr_t 2039a411307Srie ld_sym_nodirect(Is_desc *isp, Ifl_desc *ifl, Ofl_desc *ofl) 2047c478bd9Sstevel@tonic-gate { 2057c478bd9Sstevel@tonic-gate Shdr *sifshdr, *symshdr; 2067c478bd9Sstevel@tonic-gate Syminfo *sifdata; 2077c478bd9Sstevel@tonic-gate Sym *symdata; 2087c478bd9Sstevel@tonic-gate char *strdata; 2097c478bd9Sstevel@tonic-gate ulong_t cnt, _cnt; 2107c478bd9Sstevel@tonic-gate 2117c478bd9Sstevel@tonic-gate /* 2127c478bd9Sstevel@tonic-gate * Get the syminfo data, and determine the number of entries. 2137c478bd9Sstevel@tonic-gate */ 2147c478bd9Sstevel@tonic-gate sifshdr = isp->is_shdr; 2157c478bd9Sstevel@tonic-gate sifdata = (Syminfo *)isp->is_indata->d_buf; 2167c478bd9Sstevel@tonic-gate cnt = sifshdr->sh_size / sifshdr->sh_entsize; 2177c478bd9Sstevel@tonic-gate 2187c478bd9Sstevel@tonic-gate /* 2197c478bd9Sstevel@tonic-gate * Get the associated symbol table. 2207c478bd9Sstevel@tonic-gate */ 2217c478bd9Sstevel@tonic-gate symshdr = ifl->ifl_isdesc[sifshdr->sh_link]->is_shdr; 2227c478bd9Sstevel@tonic-gate symdata = ifl->ifl_isdesc[sifshdr->sh_link]->is_indata->d_buf; 2237c478bd9Sstevel@tonic-gate 2247c478bd9Sstevel@tonic-gate /* 2257c478bd9Sstevel@tonic-gate * Get the string table associated with the symbol table. 2267c478bd9Sstevel@tonic-gate */ 2277c478bd9Sstevel@tonic-gate strdata = ifl->ifl_isdesc[symshdr->sh_link]->is_indata->d_buf; 2287c478bd9Sstevel@tonic-gate 2297c478bd9Sstevel@tonic-gate /* 2307c478bd9Sstevel@tonic-gate * Traverse the syminfo data for symbols that can't be directly 2317c478bd9Sstevel@tonic-gate * bound to. 2327c478bd9Sstevel@tonic-gate */ 2337c478bd9Sstevel@tonic-gate for (_cnt = 1, sifdata++; _cnt < cnt; _cnt++, sifdata++) { 2347c478bd9Sstevel@tonic-gate Sym *sym; 2357c478bd9Sstevel@tonic-gate char *str; 2367c478bd9Sstevel@tonic-gate Sym_desc *sdp; 2377c478bd9Sstevel@tonic-gate 2383c4993fbSrie if ((sifdata->si_flags & SYMINFO_FLG_NOEXTDIRECT) == 0) 2397c478bd9Sstevel@tonic-gate continue; 2407c478bd9Sstevel@tonic-gate 2417c478bd9Sstevel@tonic-gate sym = (Sym *)(symdata + _cnt); 2427c478bd9Sstevel@tonic-gate str = (char *)(strdata + sym->st_name); 2437c478bd9Sstevel@tonic-gate 2445aefb655Srie if (sdp = ld_sym_find(str, SYM_NOHASH, 0, ofl)) { 2457c478bd9Sstevel@tonic-gate if (ifl != sdp->sd_file) 2467c478bd9Sstevel@tonic-gate continue; 2477c478bd9Sstevel@tonic-gate 2487c478bd9Sstevel@tonic-gate sdp->sd_flags1 &= ~FLG_SY1_DIR; 2497c478bd9Sstevel@tonic-gate sdp->sd_flags1 |= FLG_SY1_NDIR; 2507c478bd9Sstevel@tonic-gate } 2517c478bd9Sstevel@tonic-gate } 2527c478bd9Sstevel@tonic-gate return (0); 2537c478bd9Sstevel@tonic-gate } 2547c478bd9Sstevel@tonic-gate 2557c478bd9Sstevel@tonic-gate /* 2567c478bd9Sstevel@tonic-gate * If, during symbol processing, it is necessary to update a local symbols 2577c478bd9Sstevel@tonic-gate * contents before we have generated the symbol tables in the output image, 2587c478bd9Sstevel@tonic-gate * create a new symbol structure and copy the original symbol contents. While 2597c478bd9Sstevel@tonic-gate * we are processing the input files, their local symbols are part of the 2607c478bd9Sstevel@tonic-gate * read-only mapped image. Commonly, these symbols are copied to the new output 2617c478bd9Sstevel@tonic-gate * file image and then updated to reflect their new address and any change in 2627c478bd9Sstevel@tonic-gate * attributes. However, sometimes during relocation counting, it is necessary 2637c478bd9Sstevel@tonic-gate * to adjust the symbols information. This routine provides for the generation 2647c478bd9Sstevel@tonic-gate * of a new symbol image so that this update can be performed. 2657c478bd9Sstevel@tonic-gate * All global symbols are copied to an internal symbol table to improve locality 2667c478bd9Sstevel@tonic-gate * of reference and hence performance, and thus this copying is not necessary. 2677c478bd9Sstevel@tonic-gate */ 2687c478bd9Sstevel@tonic-gate uintptr_t 2695aefb655Srie ld_sym_copy(Sym_desc *sdp) 2707c478bd9Sstevel@tonic-gate { 2717c478bd9Sstevel@tonic-gate Sym *nsym; 2727c478bd9Sstevel@tonic-gate 2737c478bd9Sstevel@tonic-gate if (sdp->sd_flags & FLG_SY_CLEAN) { 2747c478bd9Sstevel@tonic-gate if ((nsym = libld_malloc(sizeof (Sym))) == 0) 2757c478bd9Sstevel@tonic-gate return (S_ERROR); 2767c478bd9Sstevel@tonic-gate *nsym = *(sdp->sd_sym); 2777c478bd9Sstevel@tonic-gate sdp->sd_sym = nsym; 2787c478bd9Sstevel@tonic-gate sdp->sd_flags &= ~FLG_SY_CLEAN; 2797c478bd9Sstevel@tonic-gate } 2807c478bd9Sstevel@tonic-gate return (1); 2817c478bd9Sstevel@tonic-gate } 2827c478bd9Sstevel@tonic-gate 2837c478bd9Sstevel@tonic-gate /* 2847c478bd9Sstevel@tonic-gate * Finds a given name in the link editors internal symbol table. If no 2857c478bd9Sstevel@tonic-gate * hash value is specified it is calculated. A pointer to the located 2867c478bd9Sstevel@tonic-gate * Sym_desc entry is returned, or NULL if the symbol is not found. 2877c478bd9Sstevel@tonic-gate */ 2887c478bd9Sstevel@tonic-gate Sym_desc * 2895aefb655Srie ld_sym_find(const char *name, Word hash, avl_index_t *where, Ofl_desc *ofl) 2907c478bd9Sstevel@tonic-gate { 2917c478bd9Sstevel@tonic-gate Sym_avlnode qsav; 2927c478bd9Sstevel@tonic-gate Sym_avlnode *sav; 2937c478bd9Sstevel@tonic-gate 2947c478bd9Sstevel@tonic-gate if (hash == SYM_NOHASH) 2957c478bd9Sstevel@tonic-gate /* LINTED */ 2967c478bd9Sstevel@tonic-gate hash = (Word)elf_hash((const char *)name); 2977c478bd9Sstevel@tonic-gate qsav.sav_hash = hash; 2987c478bd9Sstevel@tonic-gate qsav.sav_name = name; 2997c478bd9Sstevel@tonic-gate 3007c478bd9Sstevel@tonic-gate /* 3017c478bd9Sstevel@tonic-gate * Perform search for symbol in AVL tree. Note that the 'where' field 3027c478bd9Sstevel@tonic-gate * is passed in from the caller. If a 'where' is present, it can be 303a194faf8Srie * used in subsequent 'ld_sym_enter()' calls if required. 3047c478bd9Sstevel@tonic-gate */ 3057c478bd9Sstevel@tonic-gate sav = avl_find(&ofl->ofl_symavl, &qsav, where); 3067c478bd9Sstevel@tonic-gate 3077c478bd9Sstevel@tonic-gate /* 3087c478bd9Sstevel@tonic-gate * If symbol was not found in the avl tree, return null to show that. 3097c478bd9Sstevel@tonic-gate */ 3107c478bd9Sstevel@tonic-gate if (sav == 0) 3117c478bd9Sstevel@tonic-gate return (0); 3127c478bd9Sstevel@tonic-gate 3137c478bd9Sstevel@tonic-gate /* 3147c478bd9Sstevel@tonic-gate * Return symbol found. 3157c478bd9Sstevel@tonic-gate */ 3167c478bd9Sstevel@tonic-gate return (sav->sav_symdesc); 3177c478bd9Sstevel@tonic-gate } 3187c478bd9Sstevel@tonic-gate 3197c478bd9Sstevel@tonic-gate 3207c478bd9Sstevel@tonic-gate /* 3217c478bd9Sstevel@tonic-gate * Enter a new symbol into the link editors internal symbol table. 3227c478bd9Sstevel@tonic-gate * If the symbol is from an input file, information regarding the input file 3237c478bd9Sstevel@tonic-gate * and input section is also recorded. Otherwise (file == NULL) the symbol 3247c478bd9Sstevel@tonic-gate * has been internally generated (ie. _etext, _edata, etc.). 3257c478bd9Sstevel@tonic-gate */ 3267c478bd9Sstevel@tonic-gate Sym_desc * 3275aefb655Srie ld_sym_enter(const char *name, Sym *osym, Word hash, Ifl_desc *ifl, 3285aefb655Srie Ofl_desc *ofl, Word ndx, Word shndx, Word sdflags, Half sdflags1, 3295aefb655Srie avl_index_t *where) 3307c478bd9Sstevel@tonic-gate { 3317c478bd9Sstevel@tonic-gate Sym_desc *sdp; 3327c478bd9Sstevel@tonic-gate Sym_aux *sap; 3337c478bd9Sstevel@tonic-gate Sym_avlnode *savl; 3347c478bd9Sstevel@tonic-gate char *_name; 3357c478bd9Sstevel@tonic-gate Sym *nsym; 3367c478bd9Sstevel@tonic-gate Half etype; 33760758829Srie uchar_t vis; 3387c478bd9Sstevel@tonic-gate avl_index_t _where; 3397c478bd9Sstevel@tonic-gate 3407c478bd9Sstevel@tonic-gate /* 3417c478bd9Sstevel@tonic-gate * Establish the file type. 3427c478bd9Sstevel@tonic-gate */ 3437c478bd9Sstevel@tonic-gate if (ifl) 3447c478bd9Sstevel@tonic-gate etype = ifl->ifl_ehdr->e_type; 3457c478bd9Sstevel@tonic-gate else 3467c478bd9Sstevel@tonic-gate etype = ET_NONE; 3477c478bd9Sstevel@tonic-gate 3487c478bd9Sstevel@tonic-gate ofl->ofl_entercnt++; 3497c478bd9Sstevel@tonic-gate 3507c478bd9Sstevel@tonic-gate /* 3517c478bd9Sstevel@tonic-gate * Allocate a Sym Descriptor, Auxiliary Descriptor, and a Sym AVLNode - 3527c478bd9Sstevel@tonic-gate * contiguously. 3537c478bd9Sstevel@tonic-gate */ 3547c478bd9Sstevel@tonic-gate if ((savl = libld_calloc(sizeof (Sym_avlnode) + sizeof (Sym_desc) + 3557c478bd9Sstevel@tonic-gate sizeof (Sym_aux), 1)) == 0) 3567c478bd9Sstevel@tonic-gate return ((Sym_desc *)S_ERROR); 3577c478bd9Sstevel@tonic-gate sdp = (Sym_desc *)((uintptr_t)savl + sizeof (Sym_avlnode)); 3587c478bd9Sstevel@tonic-gate sap = (Sym_aux *)((uintptr_t)sdp + sizeof (Sym_desc)); 3597c478bd9Sstevel@tonic-gate 3607c478bd9Sstevel@tonic-gate savl->sav_symdesc = sdp; 3617c478bd9Sstevel@tonic-gate sdp->sd_file = ifl; 3627c478bd9Sstevel@tonic-gate sdp->sd_aux = sap; 3637c478bd9Sstevel@tonic-gate savl->sav_hash = sap->sa_hash = hash; 3647c478bd9Sstevel@tonic-gate 3657c478bd9Sstevel@tonic-gate /* 3667c478bd9Sstevel@tonic-gate * Copy the symbol table entry from the input file into the internal 3677c478bd9Sstevel@tonic-gate * entry and have the symbol descriptor use it. 3687c478bd9Sstevel@tonic-gate */ 3697c478bd9Sstevel@tonic-gate sdp->sd_sym = nsym = &sap->sa_sym; 3707c478bd9Sstevel@tonic-gate *nsym = *osym; 3717c478bd9Sstevel@tonic-gate sdp->sd_shndx = shndx; 3727c478bd9Sstevel@tonic-gate sdp->sd_flags |= sdflags; 3737c478bd9Sstevel@tonic-gate sdp->sd_flags1 |= sdflags1; 3747c478bd9Sstevel@tonic-gate 3757c478bd9Sstevel@tonic-gate if ((_name = libld_malloc(strlen(name) + 1)) == 0) 3767c478bd9Sstevel@tonic-gate return ((Sym_desc *)S_ERROR); 3777c478bd9Sstevel@tonic-gate savl->sav_name = sdp->sd_name = (const char *)strcpy(_name, name); 3787c478bd9Sstevel@tonic-gate 3797c478bd9Sstevel@tonic-gate /* 3807c478bd9Sstevel@tonic-gate * Enter Symbol in AVL tree. 3817c478bd9Sstevel@tonic-gate */ 3827c478bd9Sstevel@tonic-gate if (where == 0) { 3837c478bd9Sstevel@tonic-gate /* LINTED */ 3847c478bd9Sstevel@tonic-gate Sym_avlnode *_savl; 3857c478bd9Sstevel@tonic-gate /* 3865aefb655Srie * If a previous ld_sym_find() hasn't initialized 'where' do it 3877c478bd9Sstevel@tonic-gate * now. 3887c478bd9Sstevel@tonic-gate */ 3897c478bd9Sstevel@tonic-gate where = &_where; 3907c478bd9Sstevel@tonic-gate _savl = avl_find(&ofl->ofl_symavl, savl, where); 3917c478bd9Sstevel@tonic-gate assert(_savl == 0); 3927c478bd9Sstevel@tonic-gate } 3937c478bd9Sstevel@tonic-gate avl_insert(&ofl->ofl_symavl, savl, *where); 3947c478bd9Sstevel@tonic-gate 3957c478bd9Sstevel@tonic-gate /* 3967c478bd9Sstevel@tonic-gate * Record the section index. This is possible because the 3977c478bd9Sstevel@tonic-gate * `ifl_isdesc' table is filled before we start symbol processing. 3987c478bd9Sstevel@tonic-gate */ 3990bc07c75Srie if ((sdflags & FLG_SY_SPECSEC) || (nsym->st_shndx == SHN_UNDEF)) 4007c478bd9Sstevel@tonic-gate sdp->sd_isc = NULL; 4017c478bd9Sstevel@tonic-gate else { 4027c478bd9Sstevel@tonic-gate sdp->sd_isc = ifl->ifl_isdesc[shndx]; 4037c478bd9Sstevel@tonic-gate 4047c478bd9Sstevel@tonic-gate /* 4057c478bd9Sstevel@tonic-gate * If this symbol is from a relocatable object, make sure that 4067c478bd9Sstevel@tonic-gate * it is still associated with a section. For example, an 4077c478bd9Sstevel@tonic-gate * unknown section type (SHT_NULL) would have been rejected on 4087c478bd9Sstevel@tonic-gate * input with a warning. Here, we make the use of the symbol 4097c478bd9Sstevel@tonic-gate * fatal. A symbol descriptor is still returned, so that the 4107c478bd9Sstevel@tonic-gate * caller can continue processing all symbols, and hence flush 4117c478bd9Sstevel@tonic-gate * out as many error conditions as possible. 4127c478bd9Sstevel@tonic-gate */ 4137c478bd9Sstevel@tonic-gate if ((etype == ET_REL) && (sdp->sd_isc == 0)) { 4145aefb655Srie eprintf(ofl->ofl_lml, ERR_FATAL, 4155aefb655Srie MSG_INTL(MSG_SYM_INVSEC), name, ifl->ifl_name, 4165aefb655Srie EC_XWORD(shndx)); 4177c478bd9Sstevel@tonic-gate ofl->ofl_flags |= FLG_OF_FATAL; 4187c478bd9Sstevel@tonic-gate return (sdp); 4197c478bd9Sstevel@tonic-gate } 4207c478bd9Sstevel@tonic-gate } 4217c478bd9Sstevel@tonic-gate 4227c478bd9Sstevel@tonic-gate /* 4237c478bd9Sstevel@tonic-gate * Mark any COMMON symbols as 'tentative'. 4247c478bd9Sstevel@tonic-gate */ 42554d82594Sseizo if (sdflags & FLG_SY_SPECSEC) { 4260bc07c75Srie if (nsym->st_shndx == SHN_COMMON) 42754d82594Sseizo sdp->sd_flags |= FLG_SY_TENTSYM; 428*ba2be530Sab #if defined(_ELF64) 429*ba2be530Sab else if ((ld_targ.t_m.m_mach == EM_AMD64) && 430*ba2be530Sab (nsym->st_shndx == SHN_X86_64_LCOMMON)) 43154d82594Sseizo sdp->sd_flags |= FLG_SY_TENTSYM; 43254d82594Sseizo #endif 43354d82594Sseizo } 4347c478bd9Sstevel@tonic-gate 4357c478bd9Sstevel@tonic-gate /* 43660758829Srie * Establish the symbols visibility and reference. 4377c478bd9Sstevel@tonic-gate */ 43860758829Srie vis = ELF_ST_VISIBILITY(nsym->st_other); 43960758829Srie 4407c478bd9Sstevel@tonic-gate if ((etype == ET_NONE) || (etype == ET_REL)) { 44160758829Srie switch (vis) { 44260758829Srie case STV_DEFAULT: 44360758829Srie sdp->sd_flags1 |= FLG_SY1_DEFAULT; 44460758829Srie break; 44560758829Srie case STV_INTERNAL: 44660758829Srie case STV_HIDDEN: 44760758829Srie sdp->sd_flags1 |= FLG_SY1_HIDDEN; 44860758829Srie break; 44960758829Srie case STV_PROTECTED: 45060758829Srie sdp->sd_flags1 |= FLG_SY1_PROTECT; 45160758829Srie break; 45260758829Srie case STV_EXPORTED: 45360758829Srie sdp->sd_flags1 |= FLG_SY1_EXPORT; 45460758829Srie break; 45560758829Srie case STV_SINGLETON: 45660758829Srie sdp->sd_flags1 |= (FLG_SY1_SINGLE | FLG_SY1_NDIR); 45760758829Srie ofl->ofl_flags1 |= FLG_OF1_NDIRECT; 45860758829Srie break; 45960758829Srie case STV_ELIMINATE: 460d4517e84Srie sdp->sd_flags1 |= (FLG_SY1_HIDDEN | FLG_SY1_ELIM); 46160758829Srie break; 46260758829Srie default: 46360758829Srie assert(vis <= STV_ELIMINATE); 46460758829Srie } 46560758829Srie 4667c478bd9Sstevel@tonic-gate sdp->sd_ref = REF_REL_NEED; 4677c478bd9Sstevel@tonic-gate 4687c478bd9Sstevel@tonic-gate /* 4699a411307Srie * Under -Bnodirect, all exported interfaces that have not 4709a411307Srie * explicitly been defined protected or directly bound to, are 4719a411307Srie * tagged to prevent direct binding. 4727c478bd9Sstevel@tonic-gate */ 4730bc07c75Srie if ((ofl->ofl_flags1 & FLG_OF1_ALNODIR) && 47460758829Srie ((sdp->sd_flags1 & (FLG_SY1_PROTECT | FLG_SY1_DIR)) == 0) && 4759a411307Srie (nsym->st_shndx != SHN_UNDEF)) { 4767c478bd9Sstevel@tonic-gate sdp->sd_flags1 |= FLG_SY1_NDIR; 4779a411307Srie } 4787c478bd9Sstevel@tonic-gate } else { 4797c478bd9Sstevel@tonic-gate sdp->sd_ref = REF_DYN_SEEN; 4807c478bd9Sstevel@tonic-gate 4817c478bd9Sstevel@tonic-gate /* 4827c478bd9Sstevel@tonic-gate * Record the binding file for this symbol in the sa_bindto 4837c478bd9Sstevel@tonic-gate * field. If this symbol is ever overridden by a REF_REL_NEED 4847c478bd9Sstevel@tonic-gate * definition, sa_bindto is used when building a 'translator'. 4857c478bd9Sstevel@tonic-gate */ 4860bc07c75Srie if (nsym->st_shndx != SHN_UNDEF) 4877c478bd9Sstevel@tonic-gate sdp->sd_aux->sa_bindto = ifl; 4887c478bd9Sstevel@tonic-gate 4897c478bd9Sstevel@tonic-gate /* 49060758829Srie * If this is a protected symbol, remember this. Note, this 49160758829Srie * state is different from the FLG_SY1_PROTECT used to establish 49260758829Srie * a symbol definitions visibility. This state is used to warn 49360758829Srie * against possible copy relocations against this referenced 49460758829Srie * symbol. 4957c478bd9Sstevel@tonic-gate */ 49660758829Srie if (vis == STV_PROTECTED) 4977c478bd9Sstevel@tonic-gate sdp->sd_flags |= FLG_SY_PROT; 4987c478bd9Sstevel@tonic-gate 4997c478bd9Sstevel@tonic-gate /* 50060758829Srie * If this is a SINGLETON definition, then indicate the symbol 50160758829Srie * can not be directly bound to, and retain the visibility. 50260758829Srie * This visibility will be inherited by any references made to 50360758829Srie * this symbol. 5047c478bd9Sstevel@tonic-gate */ 50560758829Srie if ((vis == STV_SINGLETON) && (nsym->st_shndx != SHN_UNDEF)) 50660758829Srie sdp->sd_flags1 |= (FLG_SY1_SINGLE | FLG_SY1_NDIR); 5077c478bd9Sstevel@tonic-gate 5087c478bd9Sstevel@tonic-gate /* 50960758829Srie * If the new symbol is from a shared library and is associated 51060758829Srie * with a SHT_NOBITS section then this symbol originated from a 51160758829Srie * tentative symbol. 5127c478bd9Sstevel@tonic-gate */ 5137c478bd9Sstevel@tonic-gate if (sdp->sd_isc && 5147c478bd9Sstevel@tonic-gate (sdp->sd_isc->is_shdr->sh_type == SHT_NOBITS)) 5157c478bd9Sstevel@tonic-gate sdp->sd_flags |= FLG_SY_TENTSYM; 5167c478bd9Sstevel@tonic-gate } 5177c478bd9Sstevel@tonic-gate 5187c478bd9Sstevel@tonic-gate /* 5197c478bd9Sstevel@tonic-gate * Reclassify any SHN_SUNW_IGNORE symbols to SHN_UNDEF so as to 5200bc07c75Srie * simplify future processing. 5217c478bd9Sstevel@tonic-gate */ 5220bc07c75Srie if (nsym->st_shndx == SHN_SUNW_IGNORE) { 5237c478bd9Sstevel@tonic-gate sdp->sd_shndx = shndx = SHN_UNDEF; 5247c478bd9Sstevel@tonic-gate sdp->sd_flags |= FLG_SY_REDUCED; 5257c478bd9Sstevel@tonic-gate sdp->sd_flags1 |= 52660758829Srie (FLG_SY1_HIDDEN | FLG_SY1_IGNORE | FLG_SY1_ELIM); 5277c478bd9Sstevel@tonic-gate } 5287c478bd9Sstevel@tonic-gate 5297c478bd9Sstevel@tonic-gate /* 5307c478bd9Sstevel@tonic-gate * If this is an undefined, or common symbol from a relocatable object 5317c478bd9Sstevel@tonic-gate * determine whether it is a global or weak reference (see build_osym(), 5327c478bd9Sstevel@tonic-gate * where REF_DYN_NEED definitions are returned back to undefines). 5337c478bd9Sstevel@tonic-gate */ 53454d82594Sseizo if ((etype == ET_REL) && 53554d82594Sseizo (ELF_ST_BIND(nsym->st_info) == STB_GLOBAL) && 5360bc07c75Srie ((nsym->st_shndx == SHN_UNDEF) || ((sdflags & FLG_SY_SPECSEC) && 537*ba2be530Sab #if defined(_ELF64) 5380bc07c75Srie ((nsym->st_shndx == SHN_COMMON) || 539*ba2be530Sab ((ld_targ.t_m.m_mach == EM_AMD64) && 540*ba2be530Sab (nsym->st_shndx == SHN_X86_64_LCOMMON)))))) 54154d82594Sseizo #else 54233eb6ee1Sab /* BEGIN CSTYLED */ 5430bc07c75Srie (nsym->st_shndx == SHN_COMMON)))) 54433eb6ee1Sab /* END CSTYLED */ 54554d82594Sseizo #endif 5467c478bd9Sstevel@tonic-gate sdp->sd_flags |= FLG_SY_GLOBREF; 5477c478bd9Sstevel@tonic-gate 5487c478bd9Sstevel@tonic-gate /* 5497c478bd9Sstevel@tonic-gate * Record the input filename on the referenced or defined files list 5507c478bd9Sstevel@tonic-gate * for possible later diagnostics. The `sa_rfile' pointer contains the 5517c478bd9Sstevel@tonic-gate * name of the file that first referenced this symbol and is used to 5527c478bd9Sstevel@tonic-gate * generate undefined symbol diagnostics (refer to sym_undef_entry()). 5537c478bd9Sstevel@tonic-gate * Note that this entry can be overridden if a reference from a 5547c478bd9Sstevel@tonic-gate * relocatable object is found after a reference from a shared object 5557c478bd9Sstevel@tonic-gate * (refer to sym_override()). 5567c478bd9Sstevel@tonic-gate * The `sa_dfiles' list is used to maintain the list of files that 5577c478bd9Sstevel@tonic-gate * define the same symbol. This list can be used for two reasons: 5587c478bd9Sstevel@tonic-gate * 5597c478bd9Sstevel@tonic-gate * o To save the first definition of a symbol that is not available 5607c478bd9Sstevel@tonic-gate * for this link-edit. 5617c478bd9Sstevel@tonic-gate * 5627c478bd9Sstevel@tonic-gate * o To save all definitions of a symbol when the -m option is in 5637c478bd9Sstevel@tonic-gate * effect. This is optional as it is used to list multiple 5647c478bd9Sstevel@tonic-gate * (interposed) definitions of a symbol (refer to ldmap_out()), 5657c478bd9Sstevel@tonic-gate * and can be quite expensive. 5667c478bd9Sstevel@tonic-gate */ 5670bc07c75Srie if (nsym->st_shndx == SHN_UNDEF) { 5687c478bd9Sstevel@tonic-gate sap->sa_rfile = ifl->ifl_name; 5697c478bd9Sstevel@tonic-gate } else { 5707c478bd9Sstevel@tonic-gate if (sdp->sd_ref == REF_DYN_SEEN) { 5717c478bd9Sstevel@tonic-gate /* 5727c478bd9Sstevel@tonic-gate * A symbol is determined to be unavailable if it 5737c478bd9Sstevel@tonic-gate * belongs to a version of a shared object that this 5747c478bd9Sstevel@tonic-gate * user does not wish to use, or if it belongs to an 5757c478bd9Sstevel@tonic-gate * implicit shared object. 5767c478bd9Sstevel@tonic-gate */ 5777c478bd9Sstevel@tonic-gate if (ifl->ifl_vercnt) { 5789039eeafSab Ver_index *vip; 5797c478bd9Sstevel@tonic-gate Half vndx = ifl->ifl_versym[ndx]; 5807c478bd9Sstevel@tonic-gate 5817c478bd9Sstevel@tonic-gate sap->sa_dverndx = vndx; 5827c478bd9Sstevel@tonic-gate vip = &ifl->ifl_verndx[vndx]; 5837c478bd9Sstevel@tonic-gate if (!(vip->vi_flags & FLG_VER_AVAIL)) { 5847c478bd9Sstevel@tonic-gate sdp->sd_flags |= FLG_SY_NOTAVAIL; 5857c478bd9Sstevel@tonic-gate sap->sa_vfile = ifl->ifl_name; 5867c478bd9Sstevel@tonic-gate } 5877c478bd9Sstevel@tonic-gate } 5887c478bd9Sstevel@tonic-gate if (!(ifl->ifl_flags & FLG_IF_NEEDED)) 5897c478bd9Sstevel@tonic-gate sdp->sd_flags |= FLG_SY_NOTAVAIL; 5907c478bd9Sstevel@tonic-gate 5917c478bd9Sstevel@tonic-gate } else if (etype == ET_REL) { 5927c478bd9Sstevel@tonic-gate /* 5937c478bd9Sstevel@tonic-gate * If this symbol has been obtained from a versioned 5947c478bd9Sstevel@tonic-gate * input relocatable object then the new symbol must be 5957c478bd9Sstevel@tonic-gate * promoted to the versioning of the output file. 5967c478bd9Sstevel@tonic-gate */ 5977c478bd9Sstevel@tonic-gate if (ifl->ifl_versym) 5985aefb655Srie ld_vers_promote(sdp, ndx, ifl, ofl); 5997c478bd9Sstevel@tonic-gate } 6007c478bd9Sstevel@tonic-gate 6017c478bd9Sstevel@tonic-gate if ((ofl->ofl_flags & FLG_OF_GENMAP) && 6027c478bd9Sstevel@tonic-gate ((sdflags & FLG_SY_SPECSEC) == 0)) 6037c478bd9Sstevel@tonic-gate if (list_appendc(&sap->sa_dfiles, ifl->ifl_name) == 0) 6047c478bd9Sstevel@tonic-gate return ((Sym_desc *)S_ERROR); 6057c478bd9Sstevel@tonic-gate } 6067c478bd9Sstevel@tonic-gate 60760758829Srie /* 60860758829Srie * Provided we're not processing a mapfile, diagnose the entered symbol. 60960758829Srie * Mapfile processing requires the symbol to be updated with additional 61060758829Srie * information, therefore the diagnosing of the symbol is deferred until 61160758829Srie * later (see Dbg_map_symbol()). 61260758829Srie */ 61360758829Srie if ((ifl == 0) || ((ifl->ifl_flags & FLG_IF_MAPFILE) == 0)) 61460758829Srie DBG_CALL(Dbg_syms_entered(ofl, nsym, sdp)); 6157c478bd9Sstevel@tonic-gate return (sdp); 6167c478bd9Sstevel@tonic-gate } 6177c478bd9Sstevel@tonic-gate 6187c478bd9Sstevel@tonic-gate /* 6197c478bd9Sstevel@tonic-gate * Add a special symbol to the symbol table. Takes special symbol name with 6207c478bd9Sstevel@tonic-gate * and without underscores. This routine is called, after all other symbol 6217c478bd9Sstevel@tonic-gate * resolution has completed, to generate a reserved absolute symbol (the 6227c478bd9Sstevel@tonic-gate * underscore version). Special symbols are updated with the appropriate 623dd94ecefSrie * values in update_osym(). If the user has already defined this symbol 6247c478bd9Sstevel@tonic-gate * issue a warning and leave the symbol as is. If the non-underscore symbol 6257c478bd9Sstevel@tonic-gate * is referenced then turn it into a weak alias of the underscored symbol. 6267c478bd9Sstevel@tonic-gate * 627d579eb63Sab * The bits in flags_u are OR'd into the flags field of the symbol 628d579eb63Sab * for the underscored symbol. 629d579eb63Sab * 6307c478bd9Sstevel@tonic-gate * If this is a global symbol, and it hasn't explicitly been defined as being 6317c478bd9Sstevel@tonic-gate * directly bound to, indicate that it can't be directly bound to. 6327c478bd9Sstevel@tonic-gate * Historically, most special symbols only have meaning to the object in which 633c1c6f601Srie * they exist, however, they've always been global. To ensure compatibility 634c1c6f601Srie * with any unexpected use presently in effect, ensure these symbols don't get 6357c478bd9Sstevel@tonic-gate * directly bound to. Note, that establishing this state here isn't sufficient 6367c478bd9Sstevel@tonic-gate * to create a syminfo table, only if a syminfo table is being created by some 637c1c6f601Srie * other symbol directives will the nodirect binding be recorded. This ensures 6387c478bd9Sstevel@tonic-gate * we don't create syminfo sections for all objects we create, as this might add 6397c478bd9Sstevel@tonic-gate * unnecessary bloat to users who haven't explicitly requested extra symbol 6407c478bd9Sstevel@tonic-gate * information. 6417c478bd9Sstevel@tonic-gate */ 6427c478bd9Sstevel@tonic-gate static uintptr_t 6437c478bd9Sstevel@tonic-gate sym_add_spec(const char *name, const char *uname, Word sdaux_id, 644d579eb63Sab Word flags_u, Half flags1, Ofl_desc *ofl) 6457c478bd9Sstevel@tonic-gate { 6467c478bd9Sstevel@tonic-gate Sym_desc *sdp; 6477c478bd9Sstevel@tonic-gate Sym_desc *usdp; 6487c478bd9Sstevel@tonic-gate Sym *sym; 6497c478bd9Sstevel@tonic-gate Word hash; 6507c478bd9Sstevel@tonic-gate avl_index_t where; 6517c478bd9Sstevel@tonic-gate 6527c478bd9Sstevel@tonic-gate /* LINTED */ 6537c478bd9Sstevel@tonic-gate hash = (Word)elf_hash(uname); 6545aefb655Srie if (usdp = ld_sym_find(uname, hash, &where, ofl)) { 6557c478bd9Sstevel@tonic-gate /* 6567c478bd9Sstevel@tonic-gate * If the underscore symbol exists and is undefined, or was 6577c478bd9Sstevel@tonic-gate * defined in a shared library, convert it to a local symbol. 6587c478bd9Sstevel@tonic-gate * Otherwise leave it as is and warn the user. 6597c478bd9Sstevel@tonic-gate */ 6607c478bd9Sstevel@tonic-gate if ((usdp->sd_shndx == SHN_UNDEF) || 6617c478bd9Sstevel@tonic-gate (usdp->sd_ref != REF_REL_NEED)) { 6627c478bd9Sstevel@tonic-gate usdp->sd_ref = REF_REL_NEED; 6637c478bd9Sstevel@tonic-gate usdp->sd_shndx = usdp->sd_sym->st_shndx = SHN_ABS; 664d579eb63Sab usdp->sd_flags |= FLG_SY_SPECSEC | flags_u; 6657c478bd9Sstevel@tonic-gate usdp->sd_sym->st_info = 6667c478bd9Sstevel@tonic-gate ELF_ST_INFO(STB_GLOBAL, STT_OBJECT); 6677c478bd9Sstevel@tonic-gate usdp->sd_isc = NULL; 6687c478bd9Sstevel@tonic-gate usdp->sd_sym->st_size = 0; 6697c478bd9Sstevel@tonic-gate usdp->sd_sym->st_value = 0; 6707c478bd9Sstevel@tonic-gate /* LINTED */ 6717c478bd9Sstevel@tonic-gate usdp->sd_aux->sa_symspec = (Half)sdaux_id; 6727c478bd9Sstevel@tonic-gate 6737c478bd9Sstevel@tonic-gate /* 6749a411307Srie * If a user hasn't specifically indicated that the 6759a411307Srie * scope of this symbol be made local, then leave it 6769a411307Srie * as global (ie. prevent automatic scoping). The GOT 6779a411307Srie * should be defined protected, whereas all other 6789a411307Srie * special symbols are tagged as no-direct. 6797c478bd9Sstevel@tonic-gate */ 68060758829Srie if (((usdp->sd_flags1 & FLG_SY1_HIDDEN) == 0) && 68160758829Srie (flags1 & FLG_SY1_DEFAULT)) { 68233eb6ee1Sab usdp->sd_aux->sa_overndx = VER_NDX_GLOBAL; 68333eb6ee1Sab if (sdaux_id == SDAUX_ID_GOT) { 68433eb6ee1Sab usdp->sd_flags1 &= ~FLG_SY1_NDIR; 68560758829Srie usdp->sd_flags1 |= FLG_SY1_PROTECT; 68633eb6ee1Sab usdp->sd_sym->st_other = STV_PROTECTED; 68733eb6ee1Sab } else if ( 68833eb6ee1Sab ((usdp->sd_flags1 & FLG_SY1_DIR) == 0) && 68933eb6ee1Sab ((ofl->ofl_flags & FLG_OF_SYMBOLIC) == 0)) { 69033eb6ee1Sab usdp->sd_flags1 |= FLG_SY1_NDIR; 69133eb6ee1Sab } 6927c478bd9Sstevel@tonic-gate } 6937c478bd9Sstevel@tonic-gate usdp->sd_flags1 |= flags1; 6947c478bd9Sstevel@tonic-gate 6957c478bd9Sstevel@tonic-gate /* 696c1c6f601Srie * If the reference originated from a mapfile ensure 6977c478bd9Sstevel@tonic-gate * we mark the symbol as used. 6987c478bd9Sstevel@tonic-gate */ 6997c478bd9Sstevel@tonic-gate if (usdp->sd_flags & FLG_SY_MAPREF) 7007c478bd9Sstevel@tonic-gate usdp->sd_flags |= FLG_SY_MAPUSED; 7017c478bd9Sstevel@tonic-gate 7025aefb655Srie DBG_CALL(Dbg_syms_updated(ofl, usdp, uname)); 7037c478bd9Sstevel@tonic-gate } else 7045aefb655Srie eprintf(ofl->ofl_lml, ERR_WARNING, 7055aefb655Srie MSG_INTL(MSG_SYM_RESERVE), uname, 7067c478bd9Sstevel@tonic-gate usdp->sd_file->ifl_name); 7077c478bd9Sstevel@tonic-gate } else { 7087c478bd9Sstevel@tonic-gate /* 7097c478bd9Sstevel@tonic-gate * If the symbol does not exist create it. 7107c478bd9Sstevel@tonic-gate */ 7117c478bd9Sstevel@tonic-gate if ((sym = libld_calloc(sizeof (Sym), 1)) == 0) 7127c478bd9Sstevel@tonic-gate return (S_ERROR); 7137c478bd9Sstevel@tonic-gate sym->st_shndx = SHN_ABS; 7147c478bd9Sstevel@tonic-gate sym->st_info = ELF_ST_INFO(STB_GLOBAL, STT_OBJECT); 7157c478bd9Sstevel@tonic-gate sym->st_size = 0; 7167c478bd9Sstevel@tonic-gate sym->st_value = 0; 7175aefb655Srie DBG_CALL(Dbg_syms_created(ofl->ofl_lml, uname)); 7185aefb655Srie if ((usdp = ld_sym_enter(uname, sym, hash, (Ifl_desc *)NULL, 719d579eb63Sab ofl, 0, SHN_ABS, FLG_SY_SPECSEC | flags_u, 0, &where)) == 7207c478bd9Sstevel@tonic-gate (Sym_desc *)S_ERROR) 7217c478bd9Sstevel@tonic-gate return (S_ERROR); 7227c478bd9Sstevel@tonic-gate usdp->sd_ref = REF_REL_NEED; 7237c478bd9Sstevel@tonic-gate /* LINTED */ 7247c478bd9Sstevel@tonic-gate usdp->sd_aux->sa_symspec = (Half)sdaux_id; 7257c478bd9Sstevel@tonic-gate 7267c478bd9Sstevel@tonic-gate usdp->sd_aux->sa_overndx = VER_NDX_GLOBAL; 7279a411307Srie 7289a411307Srie if (sdaux_id == SDAUX_ID_GOT) { 72960758829Srie usdp->sd_flags1 |= FLG_SY1_PROTECT; 7309a411307Srie usdp->sd_sym->st_other = STV_PROTECTED; 73160758829Srie } else if ((flags1 & FLG_SY1_DEFAULT) && 7329a411307Srie ((ofl->ofl_flags & FLG_OF_SYMBOLIC) == 0)) { 7337c478bd9Sstevel@tonic-gate usdp->sd_flags1 |= FLG_SY1_NDIR; 7349a411307Srie } 7357c478bd9Sstevel@tonic-gate usdp->sd_flags1 |= flags1; 7367c478bd9Sstevel@tonic-gate } 7377c478bd9Sstevel@tonic-gate 7385aefb655Srie if (name && (sdp = ld_sym_find(name, SYM_NOHASH, 0, ofl)) && 7390bc07c75Srie (sdp->sd_sym->st_shndx == SHN_UNDEF)) { 7407c478bd9Sstevel@tonic-gate uchar_t bind; 7417c478bd9Sstevel@tonic-gate 7427c478bd9Sstevel@tonic-gate /* 7437c478bd9Sstevel@tonic-gate * If the non-underscore symbol exists and is undefined 7447c478bd9Sstevel@tonic-gate * convert it to be a local. If the underscore has 7457c478bd9Sstevel@tonic-gate * sa_symspec set (ie. it was created above) then simulate this 7467c478bd9Sstevel@tonic-gate * as a weak alias. 7477c478bd9Sstevel@tonic-gate */ 7487c478bd9Sstevel@tonic-gate sdp->sd_ref = REF_REL_NEED; 7497c478bd9Sstevel@tonic-gate sdp->sd_shndx = sdp->sd_sym->st_shndx = SHN_ABS; 7507c478bd9Sstevel@tonic-gate sdp->sd_flags |= FLG_SY_SPECSEC; 7517c478bd9Sstevel@tonic-gate sdp->sd_isc = NULL; 7527c478bd9Sstevel@tonic-gate sdp->sd_sym->st_size = 0; 7537c478bd9Sstevel@tonic-gate sdp->sd_sym->st_value = 0; 7547c478bd9Sstevel@tonic-gate /* LINTED */ 7557c478bd9Sstevel@tonic-gate sdp->sd_aux->sa_symspec = (Half)sdaux_id; 7567c478bd9Sstevel@tonic-gate if (usdp->sd_aux->sa_symspec) { 7577c478bd9Sstevel@tonic-gate usdp->sd_aux->sa_linkndx = 0; 7587c478bd9Sstevel@tonic-gate sdp->sd_aux->sa_linkndx = 0; 7597c478bd9Sstevel@tonic-gate bind = STB_WEAK; 7607c478bd9Sstevel@tonic-gate } else 7617c478bd9Sstevel@tonic-gate bind = STB_GLOBAL; 7627c478bd9Sstevel@tonic-gate sdp->sd_sym->st_info = ELF_ST_INFO(bind, STT_OBJECT); 7637c478bd9Sstevel@tonic-gate 7647c478bd9Sstevel@tonic-gate /* 7659a411307Srie * If a user hasn't specifically indicated the scope of this 7669a411307Srie * symbol be made local then leave it as global (ie. prevent 7679a411307Srie * automatic scoping). The GOT should be defined protected, 7689a411307Srie * whereas all other special symbols are tagged as no-direct. 7697c478bd9Sstevel@tonic-gate */ 77060758829Srie if (((sdp->sd_flags1 & FLG_SY1_HIDDEN) == 0) && 77160758829Srie (flags1 & FLG_SY1_DEFAULT)) { 7727c478bd9Sstevel@tonic-gate sdp->sd_aux->sa_overndx = VER_NDX_GLOBAL; 7739a411307Srie if (sdaux_id == SDAUX_ID_GOT) { 7749a411307Srie sdp->sd_flags1 &= ~FLG_SY1_NDIR; 77560758829Srie sdp->sd_flags1 |= FLG_SY1_PROTECT; 7769a411307Srie sdp->sd_sym->st_other = STV_PROTECTED; 7779a411307Srie } else if (((sdp->sd_flags1 & FLG_SY1_DIR) == 0) && 7789a411307Srie ((ofl->ofl_flags & FLG_OF_SYMBOLIC) == 0)) { 7797c478bd9Sstevel@tonic-gate sdp->sd_flags1 |= FLG_SY1_NDIR; 7809a411307Srie } 7817c478bd9Sstevel@tonic-gate } 7827c478bd9Sstevel@tonic-gate sdp->sd_flags1 |= flags1; 7837c478bd9Sstevel@tonic-gate 7847c478bd9Sstevel@tonic-gate /* 785c1c6f601Srie * If the reference originated from a mapfile ensure 7867c478bd9Sstevel@tonic-gate * we mark the symbol as used. 7877c478bd9Sstevel@tonic-gate */ 7887c478bd9Sstevel@tonic-gate if (sdp->sd_flags & FLG_SY_MAPREF) 7897c478bd9Sstevel@tonic-gate sdp->sd_flags |= FLG_SY_MAPUSED; 7907c478bd9Sstevel@tonic-gate 7915aefb655Srie DBG_CALL(Dbg_syms_updated(ofl, sdp, name)); 7927c478bd9Sstevel@tonic-gate } 7937c478bd9Sstevel@tonic-gate return (1); 7947c478bd9Sstevel@tonic-gate } 7957c478bd9Sstevel@tonic-gate 7967c478bd9Sstevel@tonic-gate 7977c478bd9Sstevel@tonic-gate /* 7987c478bd9Sstevel@tonic-gate * Print undefined symbols. 7997c478bd9Sstevel@tonic-gate */ 8007c478bd9Sstevel@tonic-gate static Boolean undef_title = TRUE; 8017c478bd9Sstevel@tonic-gate 8025aefb655Srie static void 8035aefb655Srie sym_undef_title(Ofl_desc *ofl) 8047c478bd9Sstevel@tonic-gate { 8055aefb655Srie eprintf(ofl->ofl_lml, ERR_NONE, MSG_INTL(MSG_SYM_FMT_UNDEF), 80633eb6ee1Sab MSG_INTL(MSG_SYM_UNDEF_ITM_11), 80733eb6ee1Sab MSG_INTL(MSG_SYM_UNDEF_ITM_21), 80833eb6ee1Sab MSG_INTL(MSG_SYM_UNDEF_ITM_12), 80933eb6ee1Sab MSG_INTL(MSG_SYM_UNDEF_ITM_22)); 8107c478bd9Sstevel@tonic-gate 8117c478bd9Sstevel@tonic-gate undef_title = FALSE; 8127c478bd9Sstevel@tonic-gate } 8137c478bd9Sstevel@tonic-gate 8147c478bd9Sstevel@tonic-gate /* 8157c478bd9Sstevel@tonic-gate * Undefined symbols can fall into one of four types: 8167c478bd9Sstevel@tonic-gate * 8177c478bd9Sstevel@tonic-gate * o the symbol is really undefined (SHN_UNDEF). 8187c478bd9Sstevel@tonic-gate * 8197c478bd9Sstevel@tonic-gate * o versioning has been enabled, however this symbol has not been assigned 8207c478bd9Sstevel@tonic-gate * to one of the defined versions. 8217c478bd9Sstevel@tonic-gate * 8227c478bd9Sstevel@tonic-gate * o the symbol has been defined by an implicitly supplied library, ie. one 8237c478bd9Sstevel@tonic-gate * which was encounted because it was NEEDED by another library, rather 8247c478bd9Sstevel@tonic-gate * than from a command line supplied library which would become the only 8257c478bd9Sstevel@tonic-gate * dependency of the output file being produced. 8267c478bd9Sstevel@tonic-gate * 8277c478bd9Sstevel@tonic-gate * o the symbol has been defined by a version of a shared object that is 8287c478bd9Sstevel@tonic-gate * not permitted for this link-edit. 8297c478bd9Sstevel@tonic-gate * 8307c478bd9Sstevel@tonic-gate * In all cases the file who made the first reference to this symbol will have 8317c478bd9Sstevel@tonic-gate * been recorded via the `sa_rfile' pointer. 8327c478bd9Sstevel@tonic-gate */ 8337c478bd9Sstevel@tonic-gate typedef enum { 8347c478bd9Sstevel@tonic-gate UNDEF, NOVERSION, IMPLICIT, NOTAVAIL, 8357c478bd9Sstevel@tonic-gate BNDLOCAL 8367c478bd9Sstevel@tonic-gate } Type; 8377c478bd9Sstevel@tonic-gate 8387c478bd9Sstevel@tonic-gate static const Msg format[] = { 8397c478bd9Sstevel@tonic-gate MSG_SYM_UND_UNDEF, /* MSG_INTL(MSG_SYM_UND_UNDEF) */ 8407c478bd9Sstevel@tonic-gate MSG_SYM_UND_NOVER, /* MSG_INTL(MSG_SYM_UND_NOVER) */ 8417c478bd9Sstevel@tonic-gate MSG_SYM_UND_IMPL, /* MSG_INTL(MSG_SYM_UND_IMPL) */ 8427c478bd9Sstevel@tonic-gate MSG_SYM_UND_NOTA, /* MSG_INTL(MSG_SYM_UND_NOTA) */ 8437c478bd9Sstevel@tonic-gate MSG_SYM_UND_BNDLOCAL /* MSG_INTL(MSG_SYM_UND_BNDLOCAL) */ 8447c478bd9Sstevel@tonic-gate }; 8457c478bd9Sstevel@tonic-gate 8465aefb655Srie static void 8475aefb655Srie sym_undef_entry(Ofl_desc *ofl, Sym_desc *sdp, Type type) 8487c478bd9Sstevel@tonic-gate { 8497c478bd9Sstevel@tonic-gate const char *name1, *name2, *name3; 8507c478bd9Sstevel@tonic-gate Ifl_desc *ifl = sdp->sd_file; 8517c478bd9Sstevel@tonic-gate Sym_aux *sap = sdp->sd_aux; 8527c478bd9Sstevel@tonic-gate 8537c478bd9Sstevel@tonic-gate if (undef_title) 8545aefb655Srie sym_undef_title(ofl); 8557c478bd9Sstevel@tonic-gate 8567c478bd9Sstevel@tonic-gate switch (type) { 8577c478bd9Sstevel@tonic-gate case UNDEF: 8587c478bd9Sstevel@tonic-gate case BNDLOCAL: 8597c478bd9Sstevel@tonic-gate name1 = sap->sa_rfile; 8607c478bd9Sstevel@tonic-gate break; 8617c478bd9Sstevel@tonic-gate case NOVERSION: 8627c478bd9Sstevel@tonic-gate name1 = ifl->ifl_name; 8637c478bd9Sstevel@tonic-gate break; 8647c478bd9Sstevel@tonic-gate case IMPLICIT: 8657c478bd9Sstevel@tonic-gate name1 = sap->sa_rfile; 8667c478bd9Sstevel@tonic-gate name2 = ifl->ifl_name; 8677c478bd9Sstevel@tonic-gate break; 8687c478bd9Sstevel@tonic-gate case NOTAVAIL: 8697c478bd9Sstevel@tonic-gate name1 = sap->sa_rfile; 8707c478bd9Sstevel@tonic-gate name2 = sap->sa_vfile; 8717c478bd9Sstevel@tonic-gate name3 = ifl->ifl_verndx[sap->sa_dverndx].vi_name; 8727c478bd9Sstevel@tonic-gate break; 8737c478bd9Sstevel@tonic-gate default: 8747c478bd9Sstevel@tonic-gate return; 8757c478bd9Sstevel@tonic-gate } 8767c478bd9Sstevel@tonic-gate 8775aefb655Srie eprintf(ofl->ofl_lml, ERR_NONE, MSG_INTL(format[type]), 8785aefb655Srie demangle(sdp->sd_name), name1, name2, name3); 8797c478bd9Sstevel@tonic-gate } 8807c478bd9Sstevel@tonic-gate 8817c478bd9Sstevel@tonic-gate /* 8827c478bd9Sstevel@tonic-gate * At this point all symbol input processing has been completed, therefore 8837c478bd9Sstevel@tonic-gate * complete the symbol table entries by generating any necessary internal 8847c478bd9Sstevel@tonic-gate * symbols. 8857c478bd9Sstevel@tonic-gate */ 8867c478bd9Sstevel@tonic-gate uintptr_t 8875aefb655Srie ld_sym_spec(Ofl_desc *ofl) 8887c478bd9Sstevel@tonic-gate { 8899a411307Srie Sym_desc *sdp; 8907c478bd9Sstevel@tonic-gate 8919a411307Srie if (ofl->ofl_flags & FLG_OF_RELOBJ) 8929a411307Srie return (1); 8937c478bd9Sstevel@tonic-gate 8949a411307Srie DBG_CALL(Dbg_syms_spec_title(ofl->ofl_lml)); 8959a411307Srie 8969a411307Srie if (sym_add_spec(MSG_ORIG(MSG_SYM_ETEXT), MSG_ORIG(MSG_SYM_ETEXT_U), 89760758829Srie SDAUX_ID_ETEXT, 0, (FLG_SY1_DEFAULT | FLG_SY1_EXPDEF), 89860758829Srie ofl) == S_ERROR) 8999a411307Srie return (S_ERROR); 9009a411307Srie if (sym_add_spec(MSG_ORIG(MSG_SYM_EDATA), MSG_ORIG(MSG_SYM_EDATA_U), 90160758829Srie SDAUX_ID_EDATA, 0, (FLG_SY1_DEFAULT | FLG_SY1_EXPDEF), 90260758829Srie ofl) == S_ERROR) 9039a411307Srie return (S_ERROR); 9049a411307Srie if (sym_add_spec(MSG_ORIG(MSG_SYM_END), MSG_ORIG(MSG_SYM_END_U), 90560758829Srie SDAUX_ID_END, FLG_SY_DYNSORT, (FLG_SY1_DEFAULT | FLG_SY1_EXPDEF), 90660758829Srie ofl) == S_ERROR) 9079a411307Srie return (S_ERROR); 9089a411307Srie if (sym_add_spec(MSG_ORIG(MSG_SYM_L_END), MSG_ORIG(MSG_SYM_L_END_U), 90960758829Srie SDAUX_ID_END, 0, FLG_SY1_HIDDEN, ofl) == S_ERROR) 9109a411307Srie return (S_ERROR); 9119a411307Srie if (sym_add_spec(MSG_ORIG(MSG_SYM_L_START), MSG_ORIG(MSG_SYM_L_START_U), 91260758829Srie SDAUX_ID_START, 0, FLG_SY1_HIDDEN, ofl) == S_ERROR) 9139a411307Srie return (S_ERROR); 9147c478bd9Sstevel@tonic-gate 9159a411307Srie /* 9169a411307Srie * Historically we've always produced a _DYNAMIC symbol, even for 9179a411307Srie * static executables (in which case its value will be 0). 9189a411307Srie */ 9199a411307Srie if (sym_add_spec(MSG_ORIG(MSG_SYM_DYNAMIC), MSG_ORIG(MSG_SYM_DYNAMIC_U), 92060758829Srie SDAUX_ID_DYN, FLG_SY_DYNSORT, (FLG_SY1_DEFAULT | FLG_SY1_EXPDEF), 92160758829Srie ofl) == S_ERROR) 9229a411307Srie return (S_ERROR); 9239a411307Srie 924d579eb63Sab if (OFL_ALLOW_DYNSYM(ofl)) 9259a411307Srie if (sym_add_spec(MSG_ORIG(MSG_SYM_PLKTBL), 9269a411307Srie MSG_ORIG(MSG_SYM_PLKTBL_U), SDAUX_ID_PLT, 92760758829Srie FLG_SY_DYNSORT, (FLG_SY1_DEFAULT | FLG_SY1_EXPDEF), 92860758829Srie ofl) == S_ERROR) 9297c478bd9Sstevel@tonic-gate return (S_ERROR); 9307c478bd9Sstevel@tonic-gate 9319a411307Srie /* 9329a411307Srie * A GOT reference will be accompanied by the associated GOT symbol. 9339a411307Srie * Make sure it gets assigned the appropriate special attributes. 9349a411307Srie */ 9359a411307Srie if (((sdp = ld_sym_find(MSG_ORIG(MSG_SYM_GOFTBL_U), 9369a411307Srie SYM_NOHASH, 0, ofl)) != 0) && (sdp->sd_ref != REF_DYN_SEEN)) { 9379a411307Srie if (sym_add_spec(MSG_ORIG(MSG_SYM_GOFTBL), 938d579eb63Sab MSG_ORIG(MSG_SYM_GOFTBL_U), SDAUX_ID_GOT, FLG_SY_DYNSORT, 93960758829Srie (FLG_SY1_DEFAULT | FLG_SY1_EXPDEF), ofl) == S_ERROR) 9409a411307Srie return (S_ERROR); 9417c478bd9Sstevel@tonic-gate } 9429a411307Srie 9437c478bd9Sstevel@tonic-gate return (1); 9447c478bd9Sstevel@tonic-gate } 9457c478bd9Sstevel@tonic-gate 9467c478bd9Sstevel@tonic-gate /* 9477c478bd9Sstevel@tonic-gate * This routine checks to see if a symbols visibility needs to be reduced to 9487c478bd9Sstevel@tonic-gate * either SYMBOLIC or LOCAL. This routine can be called from either 9497c478bd9Sstevel@tonic-gate * reloc_init() or sym_validate(). 9507c478bd9Sstevel@tonic-gate */ 9517c478bd9Sstevel@tonic-gate void 9525aefb655Srie ld_sym_adjust_vis(Sym_desc *sdp, Ofl_desc *ofl) 9537c478bd9Sstevel@tonic-gate { 95460758829Srie Word oflags = ofl->ofl_flags, oflags1 = ofl->ofl_flags1; 9557c478bd9Sstevel@tonic-gate Sym *sym = sdp->sd_sym; 9567c478bd9Sstevel@tonic-gate 9570bc07c75Srie if ((sdp->sd_ref == REF_REL_NEED) && 9580bc07c75Srie (sdp->sd_sym->st_shndx != SHN_UNDEF)) { 9597c478bd9Sstevel@tonic-gate /* 96060758829Srie * If auto-reduction/elimination is enabled, reduce any 96160758829Srie * non-versioned global symbols. This routine is called either 96260758829Srie * from any initial relocation processing that references this 96360758829Srie * symbol, or from the symbol validation processing. 96460758829Srie * 96560758829Srie * A symbol is a candidate for auto-reduction/elimination if: 96660758829Srie * 96760758829Srie * . the symbol wasn't explicitly defined within a mapfile 96860758829Srie * (in which case all the necessary state has been applied 96960758829Srie * to the symbol), or 97060758829Srie * . the symbol isn't one of the family of reserved 97160758829Srie * special symbols (ie. _end, _etext, etc.), or 97260758829Srie * . the symbol isn't a SINGLETON, or 97360758829Srie * . the symbol wasn't explicitly defined within a version 97460758829Srie * definition associated with an input relocatable object. 97560758829Srie * 9767c478bd9Sstevel@tonic-gate * Indicate that the symbol has been reduced as it may be 9777c478bd9Sstevel@tonic-gate * necessary to print these symbols later. 9787c478bd9Sstevel@tonic-gate */ 9797c478bd9Sstevel@tonic-gate if (((oflags & FLG_OF_AUTOLCL) || 9807c478bd9Sstevel@tonic-gate (oflags1 & FLG_OF1_AUTOELM)) && 98160758829Srie ((sdp->sd_flags1 & MSK_SY1_NOAUTO) == 0)) { 98260758829Srie if ((sdp->sd_flags1 & FLG_SY1_HIDDEN) == 0) { 98360758829Srie sdp->sd_flags |= FLG_SY_REDUCED; 98460758829Srie sdp->sd_flags1 |= FLG_SY1_HIDDEN; 98560758829Srie } 9867c478bd9Sstevel@tonic-gate 9877c478bd9Sstevel@tonic-gate if (ofl->ofl_flags1 & 98860758829Srie (FLG_OF1_REDLSYM | FLG_OF1_AUTOELM)) { 9897c478bd9Sstevel@tonic-gate sdp->sd_flags1 |= FLG_SY1_ELIM; 99060758829Srie sym->st_other = STV_ELIMINATE | 99160758829Srie (sym->st_other & ~MSK_SYM_VISIBILITY); 99260758829Srie } else if (ELF_ST_VISIBILITY(sym->st_other) != 99360758829Srie STV_INTERNAL) 99460758829Srie sym->st_other = STV_HIDDEN | 99560758829Srie (sym->st_other & ~MSK_SYM_VISIBILITY); 9967c478bd9Sstevel@tonic-gate } 9977c478bd9Sstevel@tonic-gate 9987c478bd9Sstevel@tonic-gate /* 9999a411307Srie * If -Bsymbolic is in effect, and the symbol hasn't explicitly 10009a411307Srie * been defined nodirect (via a mapfile), then bind the global 10019a411307Srie * symbol symbolically and assign the STV_PROTECTED visibility 10027c478bd9Sstevel@tonic-gate * attribute. 10037c478bd9Sstevel@tonic-gate */ 10047c478bd9Sstevel@tonic-gate if ((oflags & FLG_OF_SYMBOLIC) && 100560758829Srie ((sdp->sd_flags1 & (FLG_SY1_HIDDEN | FLG_SY1_NDIR)) == 0)) { 100660758829Srie sdp->sd_flags1 |= FLG_SY1_PROTECT; 10077c478bd9Sstevel@tonic-gate if (ELF_ST_VISIBILITY(sym->st_other) == STV_DEFAULT) 10087c478bd9Sstevel@tonic-gate sym->st_other = STV_PROTECTED | 10097c478bd9Sstevel@tonic-gate (sym->st_other & ~MSK_SYM_VISIBILITY); 10107c478bd9Sstevel@tonic-gate } 10117c478bd9Sstevel@tonic-gate } 10127c478bd9Sstevel@tonic-gate 10137c478bd9Sstevel@tonic-gate /* 10147c478bd9Sstevel@tonic-gate * Indicate that this symbol has had it's visibility checked so that 10157c478bd9Sstevel@tonic-gate * we don't need to do this investigation again. 10167c478bd9Sstevel@tonic-gate */ 10177c478bd9Sstevel@tonic-gate sdp->sd_flags |= FLG_SY_VISIBLE; 10187c478bd9Sstevel@tonic-gate } 10197c478bd9Sstevel@tonic-gate 1020c1c6f601Srie /* 1021c1c6f601Srie * Make sure a symbol definition is local to the object being built. 1022c1c6f601Srie */ 1023c1c6f601Srie static int 1024c1c6f601Srie ensure_sym_local(Ofl_desc *ofl, Sym_desc *sdp, const char *str) 1025c1c6f601Srie { 1026c1c6f601Srie if (sdp->sd_sym->st_shndx == SHN_UNDEF) { 1027c1c6f601Srie if (str) { 1028c1c6f601Srie eprintf(ofl->ofl_lml, ERR_FATAL, 1029c1c6f601Srie MSG_INTL(MSG_SYM_UNDEF), str, 1030c1c6f601Srie demangle((char *)sdp->sd_name)); 1031c1c6f601Srie } 1032c1c6f601Srie return (1); 1033c1c6f601Srie } 1034c1c6f601Srie if (sdp->sd_ref != REF_REL_NEED) { 1035c1c6f601Srie if (str) { 1036c1c6f601Srie eprintf(ofl->ofl_lml, ERR_FATAL, 1037c1c6f601Srie MSG_INTL(MSG_SYM_EXTERN), str, 1038c1c6f601Srie demangle((char *)sdp->sd_name), 1039c1c6f601Srie sdp->sd_file->ifl_name); 1040c1c6f601Srie } 1041c1c6f601Srie return (1); 1042c1c6f601Srie } 1043c1c6f601Srie 1044c1c6f601Srie sdp->sd_flags |= FLG_SY_UPREQD; 1045c1c6f601Srie if (sdp->sd_isc) { 1046c1c6f601Srie sdp->sd_isc->is_flags |= FLG_IS_SECTREF; 1047c1c6f601Srie sdp->sd_isc->is_file->ifl_flags |= FLG_IF_FILEREF; 1048c1c6f601Srie } 1049c1c6f601Srie return (0); 1050c1c6f601Srie } 1051c1c6f601Srie 1052c1c6f601Srie /* 1053c1c6f601Srie * Make sure all the symbol definitions required for initarray, finiarray, or 1054c1c6f601Srie * preinitarray's are local to the object being built. 1055c1c6f601Srie */ 1056c1c6f601Srie static int 1057c1c6f601Srie ensure_array_local(Ofl_desc *ofl, List *list, const char *str) 1058c1c6f601Srie { 1059c1c6f601Srie Listnode *lnp; 1060c1c6f601Srie Sym_desc *sdp; 1061c1c6f601Srie int ret = 0; 1062c1c6f601Srie 1063c1c6f601Srie for (LIST_TRAVERSE(list, lnp, sdp)) 1064c1c6f601Srie ret += ensure_sym_local(ofl, sdp, str); 1065c1c6f601Srie 1066c1c6f601Srie return (ret); 1067c1c6f601Srie } 1068c1c6f601Srie 10697c478bd9Sstevel@tonic-gate /* 10707c478bd9Sstevel@tonic-gate * After all symbol table input processing has been finished, and all relocation 10717c478bd9Sstevel@tonic-gate * counting has been carried out (ie. no more symbols will be read, generated, 10727c478bd9Sstevel@tonic-gate * or modified), validate and count the relevant entries: 10737c478bd9Sstevel@tonic-gate * 10747c478bd9Sstevel@tonic-gate * o check and print any undefined symbols remaining. Note that 10757c478bd9Sstevel@tonic-gate * if a symbol has been defined by virtue of the inclusion of 10767c478bd9Sstevel@tonic-gate * an implicit shared library, it is still classed as undefined. 10777c478bd9Sstevel@tonic-gate * 10787c478bd9Sstevel@tonic-gate * o count the number of global needed symbols together with the 10797c478bd9Sstevel@tonic-gate * size of their associated name strings (if scoping has been 10807c478bd9Sstevel@tonic-gate * indicated these symbols may be reduced to locals). 10817c478bd9Sstevel@tonic-gate * 10827c478bd9Sstevel@tonic-gate * o establish the size and alignment requirements for the global 10837c478bd9Sstevel@tonic-gate * .bss section (the alignment of this section is based on the 10847c478bd9Sstevel@tonic-gate * first symbol that it will contain). 10857c478bd9Sstevel@tonic-gate */ 10867c478bd9Sstevel@tonic-gate uintptr_t 10875aefb655Srie ld_sym_validate(Ofl_desc *ofl) 10887c478bd9Sstevel@tonic-gate { 10897c478bd9Sstevel@tonic-gate Sym_avlnode *sav; 10907c478bd9Sstevel@tonic-gate Sym_desc *sdp; 10917c478bd9Sstevel@tonic-gate Sym *sym; 10927c478bd9Sstevel@tonic-gate Word oflags = ofl->ofl_flags; 10937c478bd9Sstevel@tonic-gate Word undef = 0, needed = 0, verdesc = 0; 10947c478bd9Sstevel@tonic-gate Xword bssalign = 0, tlsalign = 0; 10957c478bd9Sstevel@tonic-gate Xword bsssize = 0, tlssize = 0; 1096*ba2be530Sab #if defined(_ELF64) 109754d82594Sseizo Xword lbssalign = 0, lbsssize = 0; 109854d82594Sseizo #endif 1099c1c6f601Srie int ret; 11009039eeafSab int allow_ldynsym; 1101d579eb63Sab uchar_t type; 11027c478bd9Sstevel@tonic-gate 11037c478bd9Sstevel@tonic-gate /* 11047c478bd9Sstevel@tonic-gate * If a symbol is undefined and this link-edit calls for no undefined 11057c478bd9Sstevel@tonic-gate * symbols to remain (this is the default case when generating an 11067c478bd9Sstevel@tonic-gate * executable but can be enforced for any object using -z defs), the 11077c478bd9Sstevel@tonic-gate * symbol is classified as undefined and a fatal error condition will 11087c478bd9Sstevel@tonic-gate * be indicated. 11097c478bd9Sstevel@tonic-gate * 11107c478bd9Sstevel@tonic-gate * If the symbol is undefined and we're creating a shared object with 11117c478bd9Sstevel@tonic-gate * the -Bsymbolic flag, then the symbol is also classified as undefined 11127c478bd9Sstevel@tonic-gate * and a warning condition will be indicated. 11137c478bd9Sstevel@tonic-gate */ 11147c478bd9Sstevel@tonic-gate if ((oflags & (FLG_OF_SHAROBJ | FLG_OF_SYMBOLIC)) == 11157c478bd9Sstevel@tonic-gate (FLG_OF_SHAROBJ | FLG_OF_SYMBOLIC)) 11167c478bd9Sstevel@tonic-gate undef = FLG_OF_WARN; 11177c478bd9Sstevel@tonic-gate if (oflags & FLG_OF_NOUNDEF) 11187c478bd9Sstevel@tonic-gate undef = FLG_OF_FATAL; 11197c478bd9Sstevel@tonic-gate 11207c478bd9Sstevel@tonic-gate /* 11217c478bd9Sstevel@tonic-gate * If the symbol is referenced from an implicitly included shared object 11227c478bd9Sstevel@tonic-gate * (ie. it's not on the NEEDED list) then the symbol is also classified 11237c478bd9Sstevel@tonic-gate * as undefined and a fatal error condition will be indicated. 11247c478bd9Sstevel@tonic-gate */ 11257c478bd9Sstevel@tonic-gate if ((oflags & FLG_OF_NOUNDEF) || !(oflags & FLG_OF_SHAROBJ)) 11267c478bd9Sstevel@tonic-gate needed = FLG_OF_FATAL; 11277c478bd9Sstevel@tonic-gate 11287c478bd9Sstevel@tonic-gate /* 11297c478bd9Sstevel@tonic-gate * If the output image is being versioned all symbol definitions must be 11307c478bd9Sstevel@tonic-gate * associated with a version. Any symbol that isn't is classified as 11317c478bd9Sstevel@tonic-gate * undefined and a fatal error condition will be indicated. 11327c478bd9Sstevel@tonic-gate */ 11337c478bd9Sstevel@tonic-gate if ((oflags & FLG_OF_VERDEF) && (ofl->ofl_vercnt > VER_NDX_GLOBAL)) 11347c478bd9Sstevel@tonic-gate verdesc = FLG_OF_FATAL; 11357c478bd9Sstevel@tonic-gate 11369039eeafSab allow_ldynsym = OFL_ALLOW_LDYNSYM(ofl); 1137d579eb63Sab 1138d579eb63Sab if (allow_ldynsym) { 1139d579eb63Sab /* 1140d579eb63Sab * Normally, we disallow symbols with 0 size from appearing 1141d579eb63Sab * in a dyn[sym|tls]sort section. However, there are some 1142d579eb63Sab * symbols that serve special purposes that we want to exempt 1143d579eb63Sab * from this rule. Look them up, and set their 1144d579eb63Sab * FLG_SY_DYNSORT flag. 1145d579eb63Sab */ 1146d579eb63Sab static const char *special[] = { 1147d579eb63Sab MSG_ORIG(MSG_SYM_INIT_U), /* _init */ 1148d579eb63Sab MSG_ORIG(MSG_SYM_FINI_U), /* _fini */ 1149d579eb63Sab MSG_ORIG(MSG_SYM_START), /* _start */ 1150d579eb63Sab NULL 1151d579eb63Sab }; 1152d579eb63Sab int i; 1153d579eb63Sab 1154d579eb63Sab for (i = 0; special[i] != NULL; i++) { 1155d579eb63Sab if (((sdp = ld_sym_find(special[i], 1156d579eb63Sab SYM_NOHASH, 0, ofl)) != NULL) && 1157d579eb63Sab (sdp->sd_sym->st_size == 0)) { 1158d579eb63Sab if (ld_sym_copy(sdp) == S_ERROR) 1159d579eb63Sab return (S_ERROR); 1160d579eb63Sab sdp->sd_flags |= FLG_SY_DYNSORT; 1161d579eb63Sab } 1162d579eb63Sab } 1163d579eb63Sab } 1164d579eb63Sab 11657c478bd9Sstevel@tonic-gate /* 11667c478bd9Sstevel@tonic-gate * Collect and validate the globals from the internal symbol table. 11677c478bd9Sstevel@tonic-gate */ 11687c478bd9Sstevel@tonic-gate for (sav = avl_first(&ofl->ofl_symavl); sav; 11697c478bd9Sstevel@tonic-gate sav = AVL_NEXT(&ofl->ofl_symavl, sav)) { 117060758829Srie Is_desc *isp; 11710bc07c75Srie int undeferr = 0; 117260758829Srie uchar_t vis; 11737c478bd9Sstevel@tonic-gate 11747c478bd9Sstevel@tonic-gate sdp = sav->sav_symdesc; 11757c478bd9Sstevel@tonic-gate 11767c478bd9Sstevel@tonic-gate /* 11777c478bd9Sstevel@tonic-gate * If undefined symbols are allowed ignore any symbols that are 11787c478bd9Sstevel@tonic-gate * not needed. 11797c478bd9Sstevel@tonic-gate */ 11807c478bd9Sstevel@tonic-gate if (!(oflags & FLG_OF_NOUNDEF) && 11817c478bd9Sstevel@tonic-gate (sdp->sd_ref == REF_DYN_SEEN)) 11827c478bd9Sstevel@tonic-gate continue; 11837c478bd9Sstevel@tonic-gate 11847c478bd9Sstevel@tonic-gate /* 11857c478bd9Sstevel@tonic-gate * If the symbol originates from an external or parent mapfile 11867c478bd9Sstevel@tonic-gate * reference and hasn't been matched to a reference from a 11877c478bd9Sstevel@tonic-gate * relocatable object, ignore it. 11887c478bd9Sstevel@tonic-gate */ 11897c478bd9Sstevel@tonic-gate if ((sdp->sd_flags & (FLG_SY_EXTERN | FLG_SY_PARENT)) && 11907c478bd9Sstevel@tonic-gate ((sdp->sd_flags & FLG_SY_MAPUSED) == 0)) { 11917c478bd9Sstevel@tonic-gate sdp->sd_flags |= FLG_SY_INVALID; 11927c478bd9Sstevel@tonic-gate continue; 11937c478bd9Sstevel@tonic-gate } 11947c478bd9Sstevel@tonic-gate 11957c478bd9Sstevel@tonic-gate sym = sdp->sd_sym; 1196d579eb63Sab type = ELF_ST_TYPE(sym->st_info); 11977c478bd9Sstevel@tonic-gate 11987c478bd9Sstevel@tonic-gate /* 11997c478bd9Sstevel@tonic-gate * Sanity check TLS. 12007c478bd9Sstevel@tonic-gate */ 1201d579eb63Sab if ((type == STT_TLS) && (sym->st_size != 0) && 1202d579eb63Sab (sym->st_shndx != SHN_UNDEF) && 12030bc07c75Srie (sym->st_shndx != SHN_COMMON)) { 120460758829Srie Is_desc *isp = sdp->sd_isc; 120560758829Srie Ifl_desc *ifl = sdp->sd_file; 12067c478bd9Sstevel@tonic-gate 12077c478bd9Sstevel@tonic-gate if ((isp == 0) || (isp->is_shdr == 0) || 12087c478bd9Sstevel@tonic-gate ((isp->is_shdr->sh_flags & SHF_TLS) == 0)) { 12095aefb655Srie eprintf(ofl->ofl_lml, ERR_FATAL, 12105aefb655Srie MSG_INTL(MSG_SYM_TLS), 12117c478bd9Sstevel@tonic-gate demangle(sdp->sd_name), ifl->ifl_name); 12127c478bd9Sstevel@tonic-gate ofl->ofl_flags |= FLG_OF_FATAL; 12137c478bd9Sstevel@tonic-gate continue; 12147c478bd9Sstevel@tonic-gate } 12157c478bd9Sstevel@tonic-gate } 12167c478bd9Sstevel@tonic-gate 12177c478bd9Sstevel@tonic-gate if ((sdp->sd_flags & FLG_SY_VISIBLE) == 0) 12185aefb655Srie ld_sym_adjust_vis(sdp, ofl); 12197c478bd9Sstevel@tonic-gate 12207c478bd9Sstevel@tonic-gate if ((sdp->sd_flags & FLG_SY_REDUCED) && 12217c478bd9Sstevel@tonic-gate (oflags & FLG_OF_PROCRED)) { 12225aefb655Srie DBG_CALL(Dbg_syms_reduce(ofl, DBG_SYM_REDUCE_GLOBAL, 12235aefb655Srie sdp, 0, 0)); 12247c478bd9Sstevel@tonic-gate } 12257c478bd9Sstevel@tonic-gate 122660758829Srie /* 122760758829Srie * Record any STV_SINGLETON existence. 122860758829Srie */ 122960758829Srie if ((vis = ELF_ST_VISIBILITY(sym->st_other)) == STV_SINGLETON) 123060758829Srie ofl->ofl_dtflags_1 |= DF_1_SINGLETON; 123160758829Srie 12327c478bd9Sstevel@tonic-gate /* 12337c478bd9Sstevel@tonic-gate * If building a shared object or executable, and this is a 12347c478bd9Sstevel@tonic-gate * non-weak UNDEF symbol with reduced visibility (STV_*), then 12357c478bd9Sstevel@tonic-gate * give a fatal error. 12367c478bd9Sstevel@tonic-gate */ 123760758829Srie if (((oflags & FLG_OF_RELOBJ) == 0) && 12380bc07c75Srie (sym->st_shndx == SHN_UNDEF) && 12397c478bd9Sstevel@tonic-gate (ELF_ST_BIND(sym->st_info) != STB_WEAK)) { 124060758829Srie if (vis && (vis != STV_SINGLETON)) { 124160758829Srie sym_undef_entry(ofl, sdp, BNDLOCAL); 124260758829Srie ofl->ofl_flags |= FLG_OF_FATAL; 124360758829Srie continue; 124460758829Srie } 12457c478bd9Sstevel@tonic-gate } 12467c478bd9Sstevel@tonic-gate 12477c478bd9Sstevel@tonic-gate /* 12487c478bd9Sstevel@tonic-gate * If this symbol is defined in a non-allocatable section, 12497c478bd9Sstevel@tonic-gate * reduce it to local symbol. 12507c478bd9Sstevel@tonic-gate */ 12517c478bd9Sstevel@tonic-gate if (((isp = sdp->sd_isc) != 0) && isp->is_shdr && 12527c478bd9Sstevel@tonic-gate ((isp->is_shdr->sh_flags & SHF_ALLOC) == 0)) { 12537c478bd9Sstevel@tonic-gate sdp->sd_flags |= FLG_SY_REDUCED; 125460758829Srie sdp->sd_flags1 |= FLG_SY1_HIDDEN; 12557c478bd9Sstevel@tonic-gate } 12567c478bd9Sstevel@tonic-gate 12577c478bd9Sstevel@tonic-gate /* 12587c478bd9Sstevel@tonic-gate * If this symbol originated as a SHN_SUNW_IGNORE, it will have 12597c478bd9Sstevel@tonic-gate * been processed as an SHN_UNDEF. Return the symbol to its 12607c478bd9Sstevel@tonic-gate * original index for validation, and propagation to the output 12617c478bd9Sstevel@tonic-gate * file. 12627c478bd9Sstevel@tonic-gate */ 12637c478bd9Sstevel@tonic-gate if (sdp->sd_flags1 & FLG_SY1_IGNORE) 12640bc07c75Srie sdp->sd_shndx = SHN_SUNW_IGNORE; 12657c478bd9Sstevel@tonic-gate 12667c478bd9Sstevel@tonic-gate if (undef) { 12677c478bd9Sstevel@tonic-gate /* 12683b41b08bSab * If a non-weak reference remains undefined, or if a 12697c478bd9Sstevel@tonic-gate * mapfile reference is not bound to the relocatable 12707c478bd9Sstevel@tonic-gate * objects that make up the object being built, we have 12717c478bd9Sstevel@tonic-gate * a fatal error. 12727c478bd9Sstevel@tonic-gate * 12737c478bd9Sstevel@tonic-gate * The exceptions are symbols which are defined to be 12747c478bd9Sstevel@tonic-gate * found in the parent (FLG_SY_PARENT), which is really 12757c478bd9Sstevel@tonic-gate * only meaningful for direct binding, or are defined 12767c478bd9Sstevel@tonic-gate * external (FLG_SY_EXTERN) so as to suppress -zdefs 12777c478bd9Sstevel@tonic-gate * errors. 12787c478bd9Sstevel@tonic-gate * 12797c478bd9Sstevel@tonic-gate * Register symbols are always allowed to be UNDEF. 12807c478bd9Sstevel@tonic-gate * 12817c478bd9Sstevel@tonic-gate * Note that we don't include references created via -u 12827c478bd9Sstevel@tonic-gate * in the same shared object binding test. This is for 12837c478bd9Sstevel@tonic-gate * backward compatibility, in that a number of archive 12847c478bd9Sstevel@tonic-gate * makefile rules used -u to cause archive extraction. 12857c478bd9Sstevel@tonic-gate * These same rules have been cut and pasted to apply 12867c478bd9Sstevel@tonic-gate * to shared objects, and thus although the -u reference 12877c478bd9Sstevel@tonic-gate * is redundant, flagging it as fatal could cause some 12887c478bd9Sstevel@tonic-gate * build to fail. Also we have documented the use of 12897c478bd9Sstevel@tonic-gate * -u as a mechanism to cause binding to weak version 12907c478bd9Sstevel@tonic-gate * definitions, thus giving users an error condition 12917c478bd9Sstevel@tonic-gate * would be incorrect. 12927c478bd9Sstevel@tonic-gate */ 12937c478bd9Sstevel@tonic-gate if (!(sdp->sd_flags & FLG_SY_REGSYM) && 12940bc07c75Srie ((sym->st_shndx == SHN_UNDEF) && 12957c478bd9Sstevel@tonic-gate ((ELF_ST_BIND(sym->st_info) != STB_WEAK) && 12967c478bd9Sstevel@tonic-gate ((sdp->sd_flags & 12977c478bd9Sstevel@tonic-gate (FLG_SY_PARENT | FLG_SY_EXTERN)) == 0)) || 12987c478bd9Sstevel@tonic-gate (((sdp->sd_flags & 12997c478bd9Sstevel@tonic-gate (FLG_SY_MAPREF | FLG_SY_MAPUSED)) == 13007c478bd9Sstevel@tonic-gate FLG_SY_MAPREF) && 130160758829Srie ((sdp->sd_flags1 & (FLG_SY1_HIDDEN | 130260758829Srie FLG_SY1_PROTECT)) == 0)))) { 13035aefb655Srie sym_undef_entry(ofl, sdp, UNDEF); 13047c478bd9Sstevel@tonic-gate ofl->ofl_flags |= undef; 13057c478bd9Sstevel@tonic-gate undeferr = 1; 13067c478bd9Sstevel@tonic-gate } 13077c478bd9Sstevel@tonic-gate 13087c478bd9Sstevel@tonic-gate } else { 13097c478bd9Sstevel@tonic-gate /* 13107c478bd9Sstevel@tonic-gate * For building things like shared objects (or anything 13117c478bd9Sstevel@tonic-gate * -znodefs), undefined symbols are allowed. 13127c478bd9Sstevel@tonic-gate * 13137c478bd9Sstevel@tonic-gate * If a mapfile reference remains undefined the user 13147c478bd9Sstevel@tonic-gate * would probably like a warning at least (they've 13157c478bd9Sstevel@tonic-gate * usually mis-spelt the reference). Refer to the above 13167c478bd9Sstevel@tonic-gate * comments for discussion on -u references, which 13177c478bd9Sstevel@tonic-gate * are not tested for in the same manner. 13187c478bd9Sstevel@tonic-gate */ 13197c478bd9Sstevel@tonic-gate if ((sdp->sd_flags & 13207c478bd9Sstevel@tonic-gate (FLG_SY_MAPREF | FLG_SY_MAPUSED)) == 13217c478bd9Sstevel@tonic-gate FLG_SY_MAPREF) { 13225aefb655Srie sym_undef_entry(ofl, sdp, UNDEF); 13237c478bd9Sstevel@tonic-gate ofl->ofl_flags |= FLG_OF_WARN; 13247c478bd9Sstevel@tonic-gate undeferr = 1; 13257c478bd9Sstevel@tonic-gate } 13267c478bd9Sstevel@tonic-gate } 13277c478bd9Sstevel@tonic-gate 13287c478bd9Sstevel@tonic-gate /* 13297c478bd9Sstevel@tonic-gate * If this symbol comes from a dependency mark the dependency 13307c478bd9Sstevel@tonic-gate * as required (-z ignore can result in unused dependencies 13317c478bd9Sstevel@tonic-gate * being dropped). If we need to record dependency versioning 13327c478bd9Sstevel@tonic-gate * information indicate what version of the needed shared object 13337c478bd9Sstevel@tonic-gate * this symbol is part of. Flag the symbol as undefined if it 13347c478bd9Sstevel@tonic-gate * has not been made available to us. 13357c478bd9Sstevel@tonic-gate */ 13367c478bd9Sstevel@tonic-gate if ((sdp->sd_ref == REF_DYN_NEED) && 13377c478bd9Sstevel@tonic-gate (!(sdp->sd_flags & FLG_SY_REFRSD))) { 13387c478bd9Sstevel@tonic-gate sdp->sd_file->ifl_flags |= FLG_IF_DEPREQD; 13397c478bd9Sstevel@tonic-gate 13407c478bd9Sstevel@tonic-gate /* 13417c478bd9Sstevel@tonic-gate * Capture that we've bound to a symbol that doesn't 13427c478bd9Sstevel@tonic-gate * allow being directly bound to. 13437c478bd9Sstevel@tonic-gate */ 13447c478bd9Sstevel@tonic-gate if (sdp->sd_flags1 & FLG_SY1_NDIR) 13457c478bd9Sstevel@tonic-gate ofl->ofl_flags1 |= FLG_OF1_NDIRECT; 13467c478bd9Sstevel@tonic-gate 13477c478bd9Sstevel@tonic-gate if (sdp->sd_file->ifl_vercnt) { 13487c478bd9Sstevel@tonic-gate int vndx; 134960758829Srie Ver_index *vip; 13507c478bd9Sstevel@tonic-gate 13517c478bd9Sstevel@tonic-gate vndx = sdp->sd_aux->sa_dverndx; 13527c478bd9Sstevel@tonic-gate vip = &sdp->sd_file->ifl_verndx[vndx]; 13537c478bd9Sstevel@tonic-gate if (vip->vi_flags & FLG_VER_AVAIL) { 13547c478bd9Sstevel@tonic-gate vip->vi_flags |= FLG_VER_REFER; 13557c478bd9Sstevel@tonic-gate } else { 13565aefb655Srie sym_undef_entry(ofl, sdp, NOTAVAIL); 13577c478bd9Sstevel@tonic-gate ofl->ofl_flags |= FLG_OF_FATAL; 13587c478bd9Sstevel@tonic-gate continue; 13597c478bd9Sstevel@tonic-gate } 13607c478bd9Sstevel@tonic-gate } 13617c478bd9Sstevel@tonic-gate } 13627c478bd9Sstevel@tonic-gate 13637c478bd9Sstevel@tonic-gate /* 13647c478bd9Sstevel@tonic-gate * Test that we do not bind to symbol supplied from an implicit 13657c478bd9Sstevel@tonic-gate * shared object. If a binding is from a weak reference it can 13667c478bd9Sstevel@tonic-gate * be ignored. 13677c478bd9Sstevel@tonic-gate */ 13687c478bd9Sstevel@tonic-gate if (needed && !undeferr && (sdp->sd_flags & FLG_SY_GLOBREF) && 13697c478bd9Sstevel@tonic-gate (sdp->sd_ref == REF_DYN_NEED) && 13707c478bd9Sstevel@tonic-gate (sdp->sd_flags & FLG_SY_NOTAVAIL)) { 13715aefb655Srie sym_undef_entry(ofl, sdp, IMPLICIT); 13727c478bd9Sstevel@tonic-gate ofl->ofl_flags |= needed; 13737c478bd9Sstevel@tonic-gate continue; 13747c478bd9Sstevel@tonic-gate } 13757c478bd9Sstevel@tonic-gate 13767c478bd9Sstevel@tonic-gate /* 13777c478bd9Sstevel@tonic-gate * Test that a symbol isn't going to be reduced to local scope 13787c478bd9Sstevel@tonic-gate * which actually wants to bind to a shared object - if so it's 13797c478bd9Sstevel@tonic-gate * a fatal error. 13807c478bd9Sstevel@tonic-gate */ 13817c478bd9Sstevel@tonic-gate if ((sdp->sd_ref == REF_DYN_NEED) && 138260758829Srie (sdp->sd_flags1 & (FLG_SY1_HIDDEN | FLG_SY1_PROTECT))) { 13835aefb655Srie sym_undef_entry(ofl, sdp, BNDLOCAL); 13847c478bd9Sstevel@tonic-gate ofl->ofl_flags |= FLG_OF_FATAL; 13857c478bd9Sstevel@tonic-gate continue; 13867c478bd9Sstevel@tonic-gate } 13877c478bd9Sstevel@tonic-gate 13887c478bd9Sstevel@tonic-gate /* 13897c478bd9Sstevel@tonic-gate * If the output image is to be versioned then all symbol 13907c478bd9Sstevel@tonic-gate * definitions must be associated with a version. 13917c478bd9Sstevel@tonic-gate */ 13927c478bd9Sstevel@tonic-gate if (verdesc && (sdp->sd_ref == REF_REL_NEED) && 13930bc07c75Srie (sym->st_shndx != SHN_UNDEF) && 139460758829Srie (!(sdp->sd_flags1 & FLG_SY1_HIDDEN)) && 13957c478bd9Sstevel@tonic-gate (sdp->sd_aux->sa_overndx == 0)) { 13965aefb655Srie sym_undef_entry(ofl, sdp, NOVERSION); 13977c478bd9Sstevel@tonic-gate ofl->ofl_flags |= verdesc; 13987c478bd9Sstevel@tonic-gate continue; 13997c478bd9Sstevel@tonic-gate } 14007c478bd9Sstevel@tonic-gate 14017c478bd9Sstevel@tonic-gate /* 14027c478bd9Sstevel@tonic-gate * If we don't need the symbol there's no need to process it 14037c478bd9Sstevel@tonic-gate * any further. 14047c478bd9Sstevel@tonic-gate */ 14057c478bd9Sstevel@tonic-gate if (sdp->sd_ref == REF_DYN_SEEN) 14067c478bd9Sstevel@tonic-gate continue; 14077c478bd9Sstevel@tonic-gate 14087c478bd9Sstevel@tonic-gate /* 14097c478bd9Sstevel@tonic-gate * Calculate the size and alignment requirements for the global 14107c478bd9Sstevel@tonic-gate * .bss and .tls sections. If we're building a relocatable 14117c478bd9Sstevel@tonic-gate * object only account for scoped COMMON symbols (these will 14127c478bd9Sstevel@tonic-gate * be converted to .bss references). 14137c478bd9Sstevel@tonic-gate * 14147c478bd9Sstevel@tonic-gate * For partially initialized symbol, 14157c478bd9Sstevel@tonic-gate * if it is expanded, it goes to sunwdata1. 14167c478bd9Sstevel@tonic-gate * if it is local, it goes to .bss. 14177c478bd9Sstevel@tonic-gate * if the output is shared object, it goes to .sunwbss. 14187c478bd9Sstevel@tonic-gate * 14197c478bd9Sstevel@tonic-gate * Also refer to make_mvsections() in sunwmove.c 14207c478bd9Sstevel@tonic-gate */ 14210bc07c75Srie if ((sym->st_shndx == SHN_COMMON) && 14220bc07c75Srie (((oflags & FLG_OF_RELOBJ) == 0) || 142360758829Srie ((sdp->sd_flags1 & FLG_SY1_HIDDEN) && 14247c478bd9Sstevel@tonic-gate (oflags & FLG_OF_PROCRED)))) { 14257c478bd9Sstevel@tonic-gate int countbss = 0; 14267c478bd9Sstevel@tonic-gate 14277c478bd9Sstevel@tonic-gate if (sdp->sd_psyminfo == 0) { 14287c478bd9Sstevel@tonic-gate countbss = 1; 14297c478bd9Sstevel@tonic-gate } else if ((sdp->sd_flags & FLG_SY_PAREXPN) != 0) { 14307c478bd9Sstevel@tonic-gate countbss = 0; 14317c478bd9Sstevel@tonic-gate } else if (ELF_ST_BIND(sym->st_info) == STB_LOCAL) { 14327c478bd9Sstevel@tonic-gate countbss = 1; 14337c478bd9Sstevel@tonic-gate } else if ((ofl->ofl_flags & FLG_OF_SHAROBJ) != 0) { 14347c478bd9Sstevel@tonic-gate countbss = 0; 14357c478bd9Sstevel@tonic-gate } else 14367c478bd9Sstevel@tonic-gate countbss = 1; 14377c478bd9Sstevel@tonic-gate 14387c478bd9Sstevel@tonic-gate if (countbss) { 14397c478bd9Sstevel@tonic-gate Xword * size, * align; 14407c478bd9Sstevel@tonic-gate 1441d579eb63Sab if (type != STT_TLS) { 14427c478bd9Sstevel@tonic-gate size = &bsssize; 14437c478bd9Sstevel@tonic-gate align = &bssalign; 14447c478bd9Sstevel@tonic-gate } else { 14457c478bd9Sstevel@tonic-gate size = &tlssize; 14467c478bd9Sstevel@tonic-gate align = &tlsalign; 14477c478bd9Sstevel@tonic-gate } 14487c478bd9Sstevel@tonic-gate *size = (Xword)S_ROUND(*size, sym->st_value) + 1449dd94ecefSrie sym->st_size; 14507c478bd9Sstevel@tonic-gate if (sym->st_value > *align) 14517c478bd9Sstevel@tonic-gate *align = sym->st_value; 14527c478bd9Sstevel@tonic-gate } 14537c478bd9Sstevel@tonic-gate } 14547c478bd9Sstevel@tonic-gate 1455*ba2be530Sab #if defined(_ELF64) 145654d82594Sseizo /* 145754d82594Sseizo * Calculate the size and alignment requirement for the global 145854d82594Sseizo * .lbss. TLS or partially initialized symbols do not need to be 145954d82594Sseizo * considered yet. 146054d82594Sseizo */ 1461*ba2be530Sab if ((ld_targ.t_m.m_mach == EM_AMD64) && 1462*ba2be530Sab (sym->st_shndx == SHN_X86_64_LCOMMON)) { 146354d82594Sseizo lbsssize = (Xword)S_ROUND(lbsssize, sym->st_value) + 146433eb6ee1Sab sym->st_size; 146554d82594Sseizo if (sym->st_value > lbssalign) 146654d82594Sseizo lbssalign = sym->st_value; 146754d82594Sseizo } 146854d82594Sseizo #endif 146954d82594Sseizo 14707c478bd9Sstevel@tonic-gate /* 14717c478bd9Sstevel@tonic-gate * If a symbol was referenced via the command line 14727c478bd9Sstevel@tonic-gate * (ld -u <>, ...), then this counts as a reference against the 14737c478bd9Sstevel@tonic-gate * symbol. Mark any section that symbol is defined in. 14747c478bd9Sstevel@tonic-gate */ 14757c478bd9Sstevel@tonic-gate if (((isp = sdp->sd_isc) != 0) && 14767c478bd9Sstevel@tonic-gate (sdp->sd_flags & FLG_SY_CMDREF)) { 14777c478bd9Sstevel@tonic-gate isp->is_flags |= FLG_IS_SECTREF; 14787c478bd9Sstevel@tonic-gate isp->is_file->ifl_flags |= FLG_IF_FILEREF; 14797c478bd9Sstevel@tonic-gate } 14807c478bd9Sstevel@tonic-gate 14817c478bd9Sstevel@tonic-gate /* 14827c478bd9Sstevel@tonic-gate * Update the symbol count and the associated name string size. 14837c478bd9Sstevel@tonic-gate */ 1484d4517e84Srie if ((sdp->sd_flags1 & FLG_SY1_HIDDEN) && 14857c478bd9Sstevel@tonic-gate (oflags & FLG_OF_PROCRED)) { 14867c478bd9Sstevel@tonic-gate /* 148760758829Srie * If any reductions are being processed, keep a count 148860758829Srie * of eliminated symbols, and if the symbol is being 148960758829Srie * reduced to local, count it's size for the .symtab. 14907c478bd9Sstevel@tonic-gate */ 14917c478bd9Sstevel@tonic-gate if (sdp->sd_flags1 & FLG_SY1_ELIM) { 14927c478bd9Sstevel@tonic-gate ofl->ofl_elimcnt++; 14937c478bd9Sstevel@tonic-gate } else { 14947c478bd9Sstevel@tonic-gate ofl->ofl_scopecnt++; 14957c478bd9Sstevel@tonic-gate if ((((sdp->sd_flags & FLG_SY_REGSYM) == 0) || 14967c478bd9Sstevel@tonic-gate sym->st_name) && (st_insert(ofl->ofl_strtab, 14977c478bd9Sstevel@tonic-gate sdp->sd_name) == -1)) 14987c478bd9Sstevel@tonic-gate return (S_ERROR); 14999039eeafSab if (allow_ldynsym && sym->st_name && 1500d579eb63Sab ldynsym_symtype[type]) { 15019039eeafSab ofl->ofl_dynscopecnt++; 15029039eeafSab if (st_insert(ofl->ofl_dynstrtab, 15039039eeafSab sdp->sd_name) == -1) 15049039eeafSab return (S_ERROR); 1505d579eb63Sab /* Include it in sort section? */ 1506d579eb63Sab DYNSORT_COUNT(sdp, sym, type, ++); 15079039eeafSab } 15087c478bd9Sstevel@tonic-gate } 15097c478bd9Sstevel@tonic-gate } else { 15107c478bd9Sstevel@tonic-gate ofl->ofl_globcnt++; 15117c478bd9Sstevel@tonic-gate 1512d579eb63Sab /* 1513d579eb63Sab * Check to see if this global variable should 1514d579eb63Sab * go into a sort section. Sort sections require 1515d579eb63Sab * a .SUNW_ldynsym section, so, don't check 1516d579eb63Sab * unless a .SUNW_ldynsym is allowed. 1517d579eb63Sab */ 1518d579eb63Sab if (allow_ldynsym) { 1519d579eb63Sab DYNSORT_COUNT(sdp, sym, type, ++); 1520d579eb63Sab } 1521d579eb63Sab 15227c478bd9Sstevel@tonic-gate /* 15237c478bd9Sstevel@tonic-gate * If global direct bindings are in effect, or this 15247c478bd9Sstevel@tonic-gate * symbol has bound to a dependency which was specified 15257c478bd9Sstevel@tonic-gate * as requiring direct bindings, and it hasn't 15267c478bd9Sstevel@tonic-gate * explicitly been defined as a non-direct binding 15277c478bd9Sstevel@tonic-gate * symbol, mark it. 15287c478bd9Sstevel@tonic-gate */ 15297c478bd9Sstevel@tonic-gate if (((ofl->ofl_dtflags_1 & DF_1_DIRECT) || (isp && 15307c478bd9Sstevel@tonic-gate (isp->is_file->ifl_flags & FLG_IF_DIRECT))) && 15317c478bd9Sstevel@tonic-gate ((sdp->sd_flags1 & FLG_SY1_NDIR) == 0)) 15327c478bd9Sstevel@tonic-gate sdp->sd_flags1 |= FLG_SY1_DIR; 15337c478bd9Sstevel@tonic-gate 15347c478bd9Sstevel@tonic-gate /* 15357c478bd9Sstevel@tonic-gate * Insert the symbol name. 15367c478bd9Sstevel@tonic-gate */ 15377c478bd9Sstevel@tonic-gate if (((sdp->sd_flags & FLG_SY_REGSYM) == 0) || 15387c478bd9Sstevel@tonic-gate sym->st_name) { 15397c478bd9Sstevel@tonic-gate if (st_insert(ofl->ofl_strtab, 15407c478bd9Sstevel@tonic-gate sdp->sd_name) == -1) 15417c478bd9Sstevel@tonic-gate return (S_ERROR); 15427c478bd9Sstevel@tonic-gate 15437c478bd9Sstevel@tonic-gate if (!(ofl->ofl_flags & FLG_OF_RELOBJ) && 15447c478bd9Sstevel@tonic-gate (st_insert(ofl->ofl_dynstrtab, 15457c478bd9Sstevel@tonic-gate sdp->sd_name) == -1)) 15467c478bd9Sstevel@tonic-gate return (S_ERROR); 15477c478bd9Sstevel@tonic-gate } 15487c478bd9Sstevel@tonic-gate 15497c478bd9Sstevel@tonic-gate /* 15507c478bd9Sstevel@tonic-gate * If this section offers a global symbol - record that 15517c478bd9Sstevel@tonic-gate * fact. 15527c478bd9Sstevel@tonic-gate */ 15537c478bd9Sstevel@tonic-gate if (isp) { 15547c478bd9Sstevel@tonic-gate isp->is_flags |= FLG_IS_SECTREF; 15557c478bd9Sstevel@tonic-gate isp->is_file->ifl_flags |= FLG_IF_FILEREF; 15567c478bd9Sstevel@tonic-gate } 15577c478bd9Sstevel@tonic-gate } 15587c478bd9Sstevel@tonic-gate } 15597c478bd9Sstevel@tonic-gate 15607c478bd9Sstevel@tonic-gate /* 15617c478bd9Sstevel@tonic-gate * If we've encountered a fatal error during symbol validation then 15627c478bd9Sstevel@tonic-gate * return now. 15637c478bd9Sstevel@tonic-gate */ 15647c478bd9Sstevel@tonic-gate if (ofl->ofl_flags & FLG_OF_FATAL) 15657c478bd9Sstevel@tonic-gate return (1); 15667c478bd9Sstevel@tonic-gate 15677c478bd9Sstevel@tonic-gate /* 15687c478bd9Sstevel@tonic-gate * Now that symbol resolution is completed, scan any register symbols. 15697c478bd9Sstevel@tonic-gate * From now on, we're only interested in those that contribute to the 15707c478bd9Sstevel@tonic-gate * output file. 15717c478bd9Sstevel@tonic-gate */ 15727c478bd9Sstevel@tonic-gate if (ofl->ofl_regsyms) { 15737c478bd9Sstevel@tonic-gate int ndx; 15747c478bd9Sstevel@tonic-gate 15757c478bd9Sstevel@tonic-gate for (ndx = 0; ndx < ofl->ofl_regsymsno; ndx++) { 15767c478bd9Sstevel@tonic-gate if ((sdp = ofl->ofl_regsyms[ndx]) == 0) 15777c478bd9Sstevel@tonic-gate continue; 15787c478bd9Sstevel@tonic-gate if (sdp->sd_ref != REF_REL_NEED) { 15797c478bd9Sstevel@tonic-gate ofl->ofl_regsyms[ndx] = 0; 15807c478bd9Sstevel@tonic-gate continue; 15817c478bd9Sstevel@tonic-gate } 15827c478bd9Sstevel@tonic-gate 15837c478bd9Sstevel@tonic-gate ofl->ofl_regsymcnt++; 15847c478bd9Sstevel@tonic-gate if (sdp->sd_sym->st_name == 0) 15857c478bd9Sstevel@tonic-gate sdp->sd_name = MSG_ORIG(MSG_STR_EMPTY); 15867c478bd9Sstevel@tonic-gate 158760758829Srie if ((sdp->sd_flags1 & FLG_SY1_HIDDEN) || 15887c478bd9Sstevel@tonic-gate (ELF_ST_BIND(sdp->sd_sym->st_info) == STB_LOCAL)) 15897c478bd9Sstevel@tonic-gate ofl->ofl_lregsymcnt++; 15907c478bd9Sstevel@tonic-gate } 15917c478bd9Sstevel@tonic-gate } 15927c478bd9Sstevel@tonic-gate 15937c478bd9Sstevel@tonic-gate /* 15947c478bd9Sstevel@tonic-gate * Generate the .bss section now that we know its size and alignment. 15957c478bd9Sstevel@tonic-gate */ 15967c478bd9Sstevel@tonic-gate if (bsssize || !(oflags & FLG_OF_RELOBJ)) { 15975aefb655Srie if (ld_make_bss(ofl, bsssize, bssalign, MAKE_BSS) == S_ERROR) 15987c478bd9Sstevel@tonic-gate return (S_ERROR); 15997c478bd9Sstevel@tonic-gate } 16007c478bd9Sstevel@tonic-gate if (tlssize) { 16015aefb655Srie if (ld_make_bss(ofl, tlssize, tlsalign, MAKE_TLS) == S_ERROR) 160254d82594Sseizo return (S_ERROR); 160354d82594Sseizo } 1604*ba2be530Sab #if defined(_ELF64) 1605*ba2be530Sab if ((ld_targ.t_m.m_mach == EM_AMD64) && 1606*ba2be530Sab lbsssize && !(oflags & FLG_OF_RELOBJ)) { 16075aefb655Srie if (ld_make_bss(ofl, lbsssize, lbssalign, MAKE_LBSS) == S_ERROR) 16087c478bd9Sstevel@tonic-gate return (S_ERROR); 16097c478bd9Sstevel@tonic-gate } 161054d82594Sseizo #endif 16117c478bd9Sstevel@tonic-gate 16127c478bd9Sstevel@tonic-gate /* 16137c478bd9Sstevel@tonic-gate * Determine what entry point symbol we need, and if found save its 16147c478bd9Sstevel@tonic-gate * symbol descriptor so that we can update the ELF header entry with the 16157c478bd9Sstevel@tonic-gate * symbols value later (see update_oehdr). Make sure the symbol is 1616c1c6f601Srie * tagged to ensure its update in case -s is in effect. Use any -e 16177c478bd9Sstevel@tonic-gate * option first, or the default entry points `_start' and `main'. 16187c478bd9Sstevel@tonic-gate */ 1619c1c6f601Srie ret = 0; 16207c478bd9Sstevel@tonic-gate if (ofl->ofl_entry) { 16211d1fba8aSrie if ((sdp = 16221d1fba8aSrie ld_sym_find(ofl->ofl_entry, SYM_NOHASH, 0, ofl)) == NULL) { 16231d1fba8aSrie eprintf(ofl->ofl_lml, ERR_FATAL, 16241d1fba8aSrie MSG_INTL(MSG_ARG_NOENTRY), ofl->ofl_entry); 16251d1fba8aSrie ret++; 16261d1fba8aSrie } else if (ensure_sym_local(ofl, sdp, 16271d1fba8aSrie MSG_INTL(MSG_SYM_ENTRY)) != 0) { 1628c1c6f601Srie ret++; 16291d1fba8aSrie } else { 16301d1fba8aSrie ofl->ofl_entry = (void *)sdp; 16317c478bd9Sstevel@tonic-gate } 16325aefb655Srie } else if (((sdp = ld_sym_find(MSG_ORIG(MSG_SYM_START), 1633c1c6f601Srie SYM_NOHASH, 0, ofl)) != NULL) && (ensure_sym_local(ofl, 1634c1c6f601Srie sdp, 0) == 0)) { 16357c478bd9Sstevel@tonic-gate ofl->ofl_entry = (void *)sdp; 1636c1c6f601Srie 16375aefb655Srie } else if (((sdp = ld_sym_find(MSG_ORIG(MSG_SYM_MAIN), 1638c1c6f601Srie SYM_NOHASH, 0, ofl)) != NULL) && (ensure_sym_local(ofl, 1639c1c6f601Srie sdp, 0) == 0)) { 16407c478bd9Sstevel@tonic-gate ofl->ofl_entry = (void *)sdp; 16417c478bd9Sstevel@tonic-gate } 16427c478bd9Sstevel@tonic-gate 16437c478bd9Sstevel@tonic-gate /* 1644c1c6f601Srie * If ld -zdtrace=<sym> was given, then validate that the symbol is 1645c1c6f601Srie * defined within the current object being built. 16467c478bd9Sstevel@tonic-gate */ 16471d1fba8aSrie if ((sdp = ofl->ofl_dtracesym) != 0) 1648c1c6f601Srie ret += ensure_sym_local(ofl, sdp, MSG_ORIG(MSG_STR_DTRACE)); 16497c478bd9Sstevel@tonic-gate 1650c1c6f601Srie /* 1651c1c6f601Srie * If any initarray, finiarray or preinitarray functions have been 1652c1c6f601Srie * requested, make sure they are defined within the current object 1653c1c6f601Srie * being built. 1654c1c6f601Srie */ 1655c1c6f601Srie if (ofl->ofl_initarray.head) { 1656c1c6f601Srie ret += ensure_array_local(ofl, &ofl->ofl_initarray, 1657c1c6f601Srie MSG_ORIG(MSG_SYM_INITARRAY)); 1658c1c6f601Srie } 1659c1c6f601Srie if (ofl->ofl_finiarray.head) { 1660c1c6f601Srie ret += ensure_array_local(ofl, &ofl->ofl_finiarray, 1661c1c6f601Srie MSG_ORIG(MSG_SYM_FINIARRAY)); 1662c1c6f601Srie } 1663c1c6f601Srie if (ofl->ofl_preiarray.head) { 1664c1c6f601Srie ret += ensure_array_local(ofl, &ofl->ofl_preiarray, 1665c1c6f601Srie MSG_ORIG(MSG_SYM_PREINITARRAY)); 1666c1c6f601Srie } 1667c1c6f601Srie 1668c1c6f601Srie if (ret) 1669c1c6f601Srie return (S_ERROR); 1670c1c6f601Srie 16717c478bd9Sstevel@tonic-gate /* 16727c478bd9Sstevel@tonic-gate * If we're required to record any needed dependencies versioning 16737c478bd9Sstevel@tonic-gate * information calculate it now that all symbols have been validated. 16747c478bd9Sstevel@tonic-gate */ 16757c478bd9Sstevel@tonic-gate if ((oflags & (FLG_OF_VERNEED | FLG_OF_NOVERSEC)) == FLG_OF_VERNEED) 16765aefb655Srie return (ld_vers_check_need(ofl)); 16777c478bd9Sstevel@tonic-gate else 16787c478bd9Sstevel@tonic-gate return (1); 16797c478bd9Sstevel@tonic-gate } 16807c478bd9Sstevel@tonic-gate 16817c478bd9Sstevel@tonic-gate /* 16827c478bd9Sstevel@tonic-gate * qsort(3c) comparison function. As an optimization for associating weak 16837c478bd9Sstevel@tonic-gate * symbols to their strong counterparts sort global symbols according to their 16847c478bd9Sstevel@tonic-gate * address and binding. 16857c478bd9Sstevel@tonic-gate */ 16867c478bd9Sstevel@tonic-gate static int 16877c478bd9Sstevel@tonic-gate compare(const void * sdpp1, const void * sdpp2) 16887c478bd9Sstevel@tonic-gate { 16897c478bd9Sstevel@tonic-gate Sym_desc * sdp1 = *((Sym_desc **)sdpp1); 16907c478bd9Sstevel@tonic-gate Sym_desc * sdp2 = *((Sym_desc **)sdpp2); 16917c478bd9Sstevel@tonic-gate Sym * sym1, * sym2; 16927c478bd9Sstevel@tonic-gate uchar_t bind1, bind2; 16937c478bd9Sstevel@tonic-gate 16947c478bd9Sstevel@tonic-gate /* 16957c478bd9Sstevel@tonic-gate * Symbol descriptors may be zero, move these to the front of the 16967c478bd9Sstevel@tonic-gate * sorted array. 16977c478bd9Sstevel@tonic-gate */ 16987c478bd9Sstevel@tonic-gate if (sdp1 == 0) 16997c478bd9Sstevel@tonic-gate return (-1); 17007c478bd9Sstevel@tonic-gate if (sdp2 == 0) 17017c478bd9Sstevel@tonic-gate return (1); 17027c478bd9Sstevel@tonic-gate 17037c478bd9Sstevel@tonic-gate sym1 = sdp1->sd_sym; 17047c478bd9Sstevel@tonic-gate sym2 = sdp2->sd_sym; 17057c478bd9Sstevel@tonic-gate 17067c478bd9Sstevel@tonic-gate /* 17077c478bd9Sstevel@tonic-gate * Compare the symbols value (address). 17087c478bd9Sstevel@tonic-gate */ 17097c478bd9Sstevel@tonic-gate if (sym1->st_value > sym2->st_value) 17107c478bd9Sstevel@tonic-gate return (1); 17117c478bd9Sstevel@tonic-gate if (sym1->st_value < sym2->st_value) 17127c478bd9Sstevel@tonic-gate return (-1); 17137c478bd9Sstevel@tonic-gate 17147c478bd9Sstevel@tonic-gate bind1 = ELF_ST_BIND(sym1->st_info); 17157c478bd9Sstevel@tonic-gate bind2 = ELF_ST_BIND(sym2->st_info); 17167c478bd9Sstevel@tonic-gate 17177c478bd9Sstevel@tonic-gate /* 17187c478bd9Sstevel@tonic-gate * If two symbols have the same address place the weak symbol before 17197c478bd9Sstevel@tonic-gate * any strong counterpart. 17207c478bd9Sstevel@tonic-gate */ 17217c478bd9Sstevel@tonic-gate if (bind1 > bind2) 17227c478bd9Sstevel@tonic-gate return (-1); 17237c478bd9Sstevel@tonic-gate if (bind1 < bind2) 17247c478bd9Sstevel@tonic-gate return (1); 17257c478bd9Sstevel@tonic-gate 17267c478bd9Sstevel@tonic-gate return (0); 17277c478bd9Sstevel@tonic-gate } 17287c478bd9Sstevel@tonic-gate 17297c478bd9Sstevel@tonic-gate 173069a0bf0cSab /* 173169a0bf0cSab * Issue a MSG_SYM_BADADDR error from ld_sym_process(). This error 173269a0bf0cSab * is issued when a symbol address/size is not contained by the 173369a0bf0cSab * target section. 173469a0bf0cSab * 173569a0bf0cSab * Such objects are at least partially corrupt, and the user would 173669a0bf0cSab * be well advised to be skeptical of them, and to ask their compiler 173769a0bf0cSab * supplier to fix the problem. However, a distinction needs to be 173869a0bf0cSab * made between symbols that reference readonly text, and those that 173969a0bf0cSab * access writable data. Other than throwing off profiling results, 174069a0bf0cSab * the readonly section case is less serious. We have encountered 174169a0bf0cSab * such objects in the field. In order to allow existing objects 174269a0bf0cSab * to continue working, we issue a warning rather than a fatal error 174369a0bf0cSab * if the symbol is against readonly text. Other cases are fatal. 174469a0bf0cSab */ 174569a0bf0cSab static void 174669a0bf0cSab issue_badaddr_msg(Ifl_desc *ifl, Ofl_desc *ofl, Sym_desc *sdp, 174769a0bf0cSab Sym *sym, Word shndx) 174869a0bf0cSab { 174969a0bf0cSab Lword flag; 175069a0bf0cSab Error err; 175169a0bf0cSab const char *msg; 175269a0bf0cSab 175369a0bf0cSab if ((sdp->sd_isc->is_shdr->sh_flags & (SHF_WRITE | SHF_ALLOC)) == 175469a0bf0cSab SHF_ALLOC) { 175569a0bf0cSab msg = MSG_INTL(MSG_SYM_BADADDR_ROTXT); 175669a0bf0cSab flag = FLG_OF_WARN; 175769a0bf0cSab err = ERR_WARNING; 175869a0bf0cSab } else { 175969a0bf0cSab msg = MSG_INTL(MSG_SYM_BADADDR); 176069a0bf0cSab flag = FLG_OF_FATAL; 176169a0bf0cSab err = ERR_FATAL; 176269a0bf0cSab } 176369a0bf0cSab 176469a0bf0cSab eprintf(ofl->ofl_lml, err, msg, demangle(sdp->sd_name), 176569a0bf0cSab ifl->ifl_name, shndx, sdp->sd_isc->is_name, 176669a0bf0cSab EC_XWORD(sdp->sd_isc->is_shdr->sh_size), 176769a0bf0cSab EC_XWORD(sym->st_value), EC_XWORD(sym->st_size)); 176869a0bf0cSab ofl->ofl_flags |= flag; 176969a0bf0cSab } 177069a0bf0cSab 177169a0bf0cSab 17727c478bd9Sstevel@tonic-gate /* 17737c478bd9Sstevel@tonic-gate * Process the symbol table for the specified input file. At this point all 17747c478bd9Sstevel@tonic-gate * input sections from this input file have been assigned an input section 17757c478bd9Sstevel@tonic-gate * descriptor which is saved in the `ifl_isdesc' array. 17767c478bd9Sstevel@tonic-gate * 17777c478bd9Sstevel@tonic-gate * o local symbols are saved (as is) if the input file is a 17787c478bd9Sstevel@tonic-gate * relocatable object 17797c478bd9Sstevel@tonic-gate * 17807c478bd9Sstevel@tonic-gate * o global symbols are added to the linkers internal symbol 17817c478bd9Sstevel@tonic-gate * table if they are not already present, otherwise a symbol 17827c478bd9Sstevel@tonic-gate * resolution function is called upon to resolve the conflict. 17837c478bd9Sstevel@tonic-gate */ 17847c478bd9Sstevel@tonic-gate uintptr_t 17855aefb655Srie ld_sym_process(Is_desc *isc, Ifl_desc *ifl, Ofl_desc *ofl) 17867c478bd9Sstevel@tonic-gate { 178775e45495Sab /* 178875e45495Sab * This macro tests the given symbol to see if it is out of 178975e45495Sab * range relative to the section it references. 179075e45495Sab * 179175e45495Sab * entry: 179275e45495Sab * - ifl is a relative object (ET_REL) 179375e45495Sab * _sdp - Symbol descriptor 179475e45495Sab * _sym - Symbol 179575e45495Sab * _type - Symbol type 179675e45495Sab * 179775e45495Sab * The following are tested: 179875e45495Sab * - Symbol length is non-zero 179975e45495Sab * - Symbol type is a type that references code or data 180075e45495Sab * - Referenced section is not 0 (indicates an UNDEF symbol) 180175e45495Sab * and is not in the range of special values above SHN_LORESERVE 180275e45495Sab * (excluding SHN_XINDEX, which is OK). 180375e45495Sab * - We have a valid section header for the target section 180475e45495Sab * 180575e45495Sab * If the above are all true, and the symbol position is not 180675e45495Sab * contained by the target section, this macro evaluates to 180775e45495Sab * True (1). Otherwise, False(0). 180875e45495Sab */ 180975e45495Sab #define SYM_LOC_BADADDR(_sdp, _sym, _type) \ 1810d579eb63Sab (_sym->st_size && dynsymsort_symtype[_type] && \ 181175e45495Sab (_sym->st_shndx != SHN_UNDEF) && \ 181275e45495Sab ((_sym->st_shndx < SHN_LORESERVE) || \ 181375e45495Sab (_sym->st_shndx == SHN_XINDEX)) && \ 181475e45495Sab _sdp->sd_isc && _sdp->sd_isc->is_shdr && \ 181575e45495Sab ((_sym->st_value + _sym->st_size) > _sdp->sd_isc->is_shdr->sh_size)) 181675e45495Sab 1817de777a60Sab Conv_inv_buf_t inv_buf; 18187c478bd9Sstevel@tonic-gate Sym *sym = (Sym *)isc->is_indata->d_buf; 18197c478bd9Sstevel@tonic-gate Word *symshndx = 0; 18207c478bd9Sstevel@tonic-gate Shdr *shdr = isc->is_shdr; 18217c478bd9Sstevel@tonic-gate Sym_desc *sdp; 18227c478bd9Sstevel@tonic-gate size_t strsize; 18237c478bd9Sstevel@tonic-gate char *strs; 18247c478bd9Sstevel@tonic-gate uchar_t type, bind; 18257c478bd9Sstevel@tonic-gate Word ndx, hash, local, total; 18267c478bd9Sstevel@tonic-gate Half etype = ifl->ifl_ehdr->e_type; 182775e45495Sab int etype_rel; 18287c478bd9Sstevel@tonic-gate const char *symsecname, *strsecname; 18297c478bd9Sstevel@tonic-gate avl_index_t where; 1830d840867fSab int test_gnu_hidden_bit; 18317c478bd9Sstevel@tonic-gate 18327c478bd9Sstevel@tonic-gate /* 18337c478bd9Sstevel@tonic-gate * Its possible that a file may contain more that one symbol table, 18347c478bd9Sstevel@tonic-gate * ie. .dynsym and .symtab in a shared library. Only process the first 18357c478bd9Sstevel@tonic-gate * table (here, we assume .dynsym comes before .symtab). 18367c478bd9Sstevel@tonic-gate */ 18377c478bd9Sstevel@tonic-gate if (ifl->ifl_symscnt) 18387c478bd9Sstevel@tonic-gate return (1); 18397c478bd9Sstevel@tonic-gate 18407c478bd9Sstevel@tonic-gate if (isc->is_symshndx) 18417c478bd9Sstevel@tonic-gate symshndx = isc->is_symshndx->is_indata->d_buf; 18427c478bd9Sstevel@tonic-gate 18435aefb655Srie DBG_CALL(Dbg_syms_process(ofl->ofl_lml, ifl)); 18447c478bd9Sstevel@tonic-gate 18457c478bd9Sstevel@tonic-gate if (isc->is_name) 18467c478bd9Sstevel@tonic-gate symsecname = isc->is_name; 18477c478bd9Sstevel@tonic-gate else 18487c478bd9Sstevel@tonic-gate symsecname = MSG_ORIG(MSG_STR_EMPTY); 18497c478bd9Sstevel@tonic-gate 18507c478bd9Sstevel@tonic-gate /* 18517c478bd9Sstevel@tonic-gate * From the symbol tables section header information determine which 18527c478bd9Sstevel@tonic-gate * strtab table is needed to locate the actual symbol names. 18537c478bd9Sstevel@tonic-gate */ 18547c478bd9Sstevel@tonic-gate if (ifl->ifl_flags & FLG_IF_HSTRTAB) { 18557c478bd9Sstevel@tonic-gate ndx = shdr->sh_link; 18567c478bd9Sstevel@tonic-gate if ((ndx == 0) || (ndx >= ifl->ifl_shnum)) { 18575aefb655Srie eprintf(ofl->ofl_lml, ERR_FATAL, 18585aefb655Srie MSG_INTL(MSG_FIL_INVSHLINK), 18597c478bd9Sstevel@tonic-gate ifl->ifl_name, symsecname, EC_XWORD(ndx)); 18607c478bd9Sstevel@tonic-gate return (S_ERROR); 18617c478bd9Sstevel@tonic-gate } 18627c478bd9Sstevel@tonic-gate strsize = ifl->ifl_isdesc[ndx]->is_shdr->sh_size; 18637c478bd9Sstevel@tonic-gate strs = ifl->ifl_isdesc[ndx]->is_indata->d_buf; 18647c478bd9Sstevel@tonic-gate if (ifl->ifl_isdesc[ndx]->is_name) 18657c478bd9Sstevel@tonic-gate strsecname = ifl->ifl_isdesc[ndx]->is_name; 18667c478bd9Sstevel@tonic-gate else 18677c478bd9Sstevel@tonic-gate strsecname = MSG_ORIG(MSG_STR_EMPTY); 18687c478bd9Sstevel@tonic-gate } else { 18697c478bd9Sstevel@tonic-gate /* 18707c478bd9Sstevel@tonic-gate * There is no string table section in this input file 18717c478bd9Sstevel@tonic-gate * although there are symbols in this symbol table section. 18727c478bd9Sstevel@tonic-gate * This means that these symbols do not have names. 18737c478bd9Sstevel@tonic-gate * Currently, only scratch register symbols are allowed 18747c478bd9Sstevel@tonic-gate * not to have names. 18757c478bd9Sstevel@tonic-gate */ 18767c478bd9Sstevel@tonic-gate strsize = 0; 18777c478bd9Sstevel@tonic-gate strs = (char *)MSG_ORIG(MSG_STR_EMPTY); 18787c478bd9Sstevel@tonic-gate strsecname = MSG_ORIG(MSG_STR_EMPTY); 18797c478bd9Sstevel@tonic-gate } 18807c478bd9Sstevel@tonic-gate 18817c478bd9Sstevel@tonic-gate /* 18827c478bd9Sstevel@tonic-gate * Determine the number of local symbols together with the total 18837c478bd9Sstevel@tonic-gate * number we have to process. 18847c478bd9Sstevel@tonic-gate */ 18857c478bd9Sstevel@tonic-gate total = (Word)(shdr->sh_size / shdr->sh_entsize); 18867c478bd9Sstevel@tonic-gate local = shdr->sh_info; 18877c478bd9Sstevel@tonic-gate 18887c478bd9Sstevel@tonic-gate /* 18897c478bd9Sstevel@tonic-gate * Allocate a symbol table index array and a local symbol array 18907c478bd9Sstevel@tonic-gate * (global symbols are processed and added to the ofl->ofl_symbkt[] 18917c478bd9Sstevel@tonic-gate * array). If we are dealing with a relocatable object, allocate the 18927c478bd9Sstevel@tonic-gate * local symbol descriptors. If this isn't a relocatable object we 18937c478bd9Sstevel@tonic-gate * still have to process any shared object locals to determine if any 18947c478bd9Sstevel@tonic-gate * register symbols exist. Although these aren't added to the output 18957c478bd9Sstevel@tonic-gate * image, they are used as part of symbol resolution. 18967c478bd9Sstevel@tonic-gate */ 18977c478bd9Sstevel@tonic-gate if ((ifl->ifl_oldndx = libld_malloc((size_t)(total * 18987c478bd9Sstevel@tonic-gate sizeof (Sym_desc *)))) == 0) 18997c478bd9Sstevel@tonic-gate return (S_ERROR); 1900d579eb63Sab etype_rel = (etype == ET_REL); 190175e45495Sab if (etype_rel && local) { 19027c478bd9Sstevel@tonic-gate if ((ifl->ifl_locs = 19037c478bd9Sstevel@tonic-gate libld_calloc(sizeof (Sym_desc), local)) == 0) 19047c478bd9Sstevel@tonic-gate return (S_ERROR); 19057c478bd9Sstevel@tonic-gate /* LINTED */ 19067c478bd9Sstevel@tonic-gate ifl->ifl_locscnt = (Word)local; 19077c478bd9Sstevel@tonic-gate } 19087c478bd9Sstevel@tonic-gate ifl->ifl_symscnt = total; 19097c478bd9Sstevel@tonic-gate 19107c478bd9Sstevel@tonic-gate /* 19117c478bd9Sstevel@tonic-gate * If there are local symbols to save add them to the symbol table 19127c478bd9Sstevel@tonic-gate * index array. 19137c478bd9Sstevel@tonic-gate */ 19147c478bd9Sstevel@tonic-gate if (local) { 19159039eeafSab int allow_ldynsym = OFL_ALLOW_LDYNSYM(ofl); 19167c478bd9Sstevel@tonic-gate for (sym++, ndx = 1; ndx < local; sym++, ndx++) { 19177c478bd9Sstevel@tonic-gate Word shndx, sdflags = FLG_SY_CLEAN; 19187c478bd9Sstevel@tonic-gate const char *name; 19197c478bd9Sstevel@tonic-gate Sym_desc *rsdp; 1920*ba2be530Sab int shndx_bad = 0; 19217c478bd9Sstevel@tonic-gate 19227c478bd9Sstevel@tonic-gate /* 1923*ba2be530Sab * Determine and validate the associated section index. 19247c478bd9Sstevel@tonic-gate */ 1925*ba2be530Sab if (symshndx && (sym->st_shndx == SHN_XINDEX)) { 19267c478bd9Sstevel@tonic-gate shndx = symshndx[ndx]; 1927*ba2be530Sab } else if ((shndx = sym->st_shndx) >= SHN_LORESERVE) { 19287c478bd9Sstevel@tonic-gate sdflags |= FLG_SY_SPECSEC; 1929*ba2be530Sab } else if (shndx > ifl->ifl_ehdr->e_shnum) { 1930*ba2be530Sab /* We need the name before we can issue error */ 1931*ba2be530Sab shndx_bad = 1; 1932*ba2be530Sab } 19337c478bd9Sstevel@tonic-gate 19347c478bd9Sstevel@tonic-gate /* 19357c478bd9Sstevel@tonic-gate * Check if st_name has a valid value or not. 19367c478bd9Sstevel@tonic-gate */ 19375aefb655Srie if ((name = string(ofl, ifl, sym, strs, strsize, ndx, 19387c478bd9Sstevel@tonic-gate shndx, symsecname, strsecname, &sdflags)) == 0) { 19397c478bd9Sstevel@tonic-gate ofl->ofl_flags |= FLG_OF_FATAL; 19407c478bd9Sstevel@tonic-gate continue; 19417c478bd9Sstevel@tonic-gate } 19427c478bd9Sstevel@tonic-gate 1943*ba2be530Sab /* 1944*ba2be530Sab * Now that we have the name, if the section index 1945*ba2be530Sab * was bad, report it. 1946*ba2be530Sab */ 1947*ba2be530Sab if (shndx_bad) { 1948*ba2be530Sab eprintf(ofl->ofl_lml, ERR_WARNING, 1949*ba2be530Sab MSG_INTL(MSG_SYM_INVSHNDX), 1950*ba2be530Sab demangle_symname(name, isc->is_name, ndx), 1951*ba2be530Sab ifl->ifl_name, 1952*ba2be530Sab conv_sym_shndx(sym->st_shndx, &inv_buf)); 1953*ba2be530Sab continue; 1954*ba2be530Sab } 1955*ba2be530Sab 19567c478bd9Sstevel@tonic-gate /* 19577c478bd9Sstevel@tonic-gate * If this local symbol table originates from a shared 19587c478bd9Sstevel@tonic-gate * object, then we're only interested in recording 19597c478bd9Sstevel@tonic-gate * register symbols. As local symbol descriptors aren't 19607c478bd9Sstevel@tonic-gate * allocated for shared objects, one will be allocated 19617c478bd9Sstevel@tonic-gate * to associated with the register symbol. This symbol 19627c478bd9Sstevel@tonic-gate * won't become part of the output image, but we must 19637c478bd9Sstevel@tonic-gate * process it to test for register conflicts. 19647c478bd9Sstevel@tonic-gate */ 19657c478bd9Sstevel@tonic-gate rsdp = sdp = 0; 19667c478bd9Sstevel@tonic-gate if (sdflags & FLG_SY_REGSYM) { 1967*ba2be530Sab /* 1968*ba2be530Sab * The presence of FLG_SY_REGSYM means that 1969*ba2be530Sab * the pointers in ld_targ.t_ms are non-NULL. 1970*ba2be530Sab */ 1971*ba2be530Sab rsdp = (*ld_targ.t_ms.ms_reg_find)(sym, ofl); 1972*ba2be530Sab if (rsdp != 0) { 19737c478bd9Sstevel@tonic-gate /* 19747c478bd9Sstevel@tonic-gate * The fact that another register def- 19757c478bd9Sstevel@tonic-gate * inition has been found is fatal. 19767c478bd9Sstevel@tonic-gate * Call the verification routine to get 19777c478bd9Sstevel@tonic-gate * the error message and move on. 19787c478bd9Sstevel@tonic-gate */ 1979*ba2be530Sab (void) (*ld_targ.t_ms.ms_reg_check) 1980*ba2be530Sab (rsdp, sym, name, ifl, ofl); 19817c478bd9Sstevel@tonic-gate continue; 19827c478bd9Sstevel@tonic-gate } 19837c478bd9Sstevel@tonic-gate 19847c478bd9Sstevel@tonic-gate if (etype == ET_DYN) { 19857c478bd9Sstevel@tonic-gate if ((sdp = libld_calloc( 19867c478bd9Sstevel@tonic-gate sizeof (Sym_desc), 1)) == 0) 19877c478bd9Sstevel@tonic-gate return (S_ERROR); 19887c478bd9Sstevel@tonic-gate sdp->sd_ref = REF_DYN_SEEN; 19897c478bd9Sstevel@tonic-gate } 19907c478bd9Sstevel@tonic-gate } else if (etype == ET_DYN) 19917c478bd9Sstevel@tonic-gate continue; 19927c478bd9Sstevel@tonic-gate 19937c478bd9Sstevel@tonic-gate /* 19947c478bd9Sstevel@tonic-gate * Fill in the remaining symbol descriptor information. 19957c478bd9Sstevel@tonic-gate */ 19967c478bd9Sstevel@tonic-gate if (sdp == 0) { 19977c478bd9Sstevel@tonic-gate sdp = &(ifl->ifl_locs[ndx]); 19987c478bd9Sstevel@tonic-gate sdp->sd_ref = REF_REL_NEED; 19997c478bd9Sstevel@tonic-gate } 20007c478bd9Sstevel@tonic-gate if (rsdp == 0) { 20017c478bd9Sstevel@tonic-gate sdp->sd_name = name; 20027c478bd9Sstevel@tonic-gate sdp->sd_sym = sym; 20037c478bd9Sstevel@tonic-gate sdp->sd_shndx = shndx; 20047c478bd9Sstevel@tonic-gate sdp->sd_flags = sdflags; 20057c478bd9Sstevel@tonic-gate sdp->sd_file = ifl; 20067c478bd9Sstevel@tonic-gate ifl->ifl_oldndx[ndx] = sdp; 20077c478bd9Sstevel@tonic-gate } 20087c478bd9Sstevel@tonic-gate 20095aefb655Srie DBG_CALL(Dbg_syms_entry(ofl->ofl_lml, ndx, sdp)); 20107c478bd9Sstevel@tonic-gate 20117c478bd9Sstevel@tonic-gate /* 20127c478bd9Sstevel@tonic-gate * Reclassify any SHN_SUNW_IGNORE symbols to SHN_UNDEF 20137c478bd9Sstevel@tonic-gate * so as to simplify future processing. 20147c478bd9Sstevel@tonic-gate */ 20150bc07c75Srie if (sym->st_shndx == SHN_SUNW_IGNORE) { 20167c478bd9Sstevel@tonic-gate sdp->sd_shndx = shndx = SHN_UNDEF; 20177c478bd9Sstevel@tonic-gate sdp->sd_flags1 |= 20187c478bd9Sstevel@tonic-gate (FLG_SY1_IGNORE | FLG_SY1_ELIM); 20197c478bd9Sstevel@tonic-gate } 20207c478bd9Sstevel@tonic-gate 20217c478bd9Sstevel@tonic-gate /* 20227c478bd9Sstevel@tonic-gate * Process any register symbols. 20237c478bd9Sstevel@tonic-gate */ 20247c478bd9Sstevel@tonic-gate if (sdp->sd_flags & FLG_SY_REGSYM) { 20257c478bd9Sstevel@tonic-gate /* 20267c478bd9Sstevel@tonic-gate * Add a diagnostic to indicate we've caught a 20277c478bd9Sstevel@tonic-gate * register symbol, as this can be useful if a 20287c478bd9Sstevel@tonic-gate * register conflict is later discovered. 20297c478bd9Sstevel@tonic-gate */ 20305aefb655Srie DBG_CALL(Dbg_syms_entered(ofl, sym, sdp)); 20317c478bd9Sstevel@tonic-gate 20327c478bd9Sstevel@tonic-gate /* 20337c478bd9Sstevel@tonic-gate * If this register symbol hasn't already been 20347c478bd9Sstevel@tonic-gate * recorded, enter it now. 2035*ba2be530Sab * 2036*ba2be530Sab * The presence of FLG_SY_REGSYM means that 2037*ba2be530Sab * the pointers in ld_targ.t_ms are non-NULL. 20387c478bd9Sstevel@tonic-gate */ 20395aefb655Srie if ((rsdp == 0) && 2040*ba2be530Sab ((*ld_targ.t_ms.ms_reg_enter)(sdp, ofl) == 2041*ba2be530Sab 0)) 20427c478bd9Sstevel@tonic-gate return (S_ERROR); 20437c478bd9Sstevel@tonic-gate } 20447c478bd9Sstevel@tonic-gate 20457c478bd9Sstevel@tonic-gate /* 20467c478bd9Sstevel@tonic-gate * Assign an input section. 20477c478bd9Sstevel@tonic-gate */ 20480bc07c75Srie if ((sym->st_shndx != SHN_UNDEF) && 20497c478bd9Sstevel@tonic-gate ((sdp->sd_flags & FLG_SY_SPECSEC) == 0)) 20507c478bd9Sstevel@tonic-gate sdp->sd_isc = ifl->ifl_isdesc[shndx]; 20517c478bd9Sstevel@tonic-gate 20527c478bd9Sstevel@tonic-gate /* 20537c478bd9Sstevel@tonic-gate * If this symbol falls within the range of a section 20547c478bd9Sstevel@tonic-gate * being discarded, then discard the symbol itself. 20557c478bd9Sstevel@tonic-gate * There is no reason to keep this local symbol. 20567c478bd9Sstevel@tonic-gate */ 20577c478bd9Sstevel@tonic-gate if (sdp->sd_isc && 20587c478bd9Sstevel@tonic-gate (sdp->sd_isc->is_flags & FLG_IS_DISCARD)) { 20597c478bd9Sstevel@tonic-gate sdp->sd_flags |= FLG_SY_ISDISC; 2060a194faf8Srie DBG_CALL(Dbg_syms_discarded(ofl->ofl_lml, sdp)); 20617c478bd9Sstevel@tonic-gate continue; 20627c478bd9Sstevel@tonic-gate } 20637c478bd9Sstevel@tonic-gate 20647c478bd9Sstevel@tonic-gate /* 20657c478bd9Sstevel@tonic-gate * Skip any section symbols as new versions of these 20667c478bd9Sstevel@tonic-gate * will be created. 20677c478bd9Sstevel@tonic-gate */ 20687c478bd9Sstevel@tonic-gate if ((type = ELF_ST_TYPE(sym->st_info)) == STT_SECTION) { 20690bc07c75Srie if (sym->st_shndx == SHN_UNDEF) { 20705aefb655Srie eprintf(ofl->ofl_lml, ERR_WARNING, 20717c478bd9Sstevel@tonic-gate MSG_INTL(MSG_SYM_INVSHNDX), 2072*ba2be530Sab demangle_symname(name, isc->is_name, 2073*ba2be530Sab ndx), ifl->ifl_name, 2074de777a60Sab conv_sym_shndx(sym->st_shndx, 2075de777a60Sab &inv_buf)); 20767c478bd9Sstevel@tonic-gate } 20777c478bd9Sstevel@tonic-gate continue; 20787c478bd9Sstevel@tonic-gate } 20797c478bd9Sstevel@tonic-gate 208075e45495Sab /* 208175e45495Sab * For a relocatable object, if this symbol is defined 208275e45495Sab * and has non-zero length and references an address 208375e45495Sab * within an associated section, then check its extents 208475e45495Sab * to make sure the section boundaries encompass it. 208575e45495Sab * If they don't, the ELF file is corrupt. 208675e45495Sab */ 208775e45495Sab if (etype_rel && SYM_LOC_BADADDR(sdp, sym, type)) { 208869a0bf0cSab issue_badaddr_msg(ifl, ofl, sdp, sym, shndx); 208975e45495Sab continue; 209075e45495Sab } 209175e45495Sab 20927c478bd9Sstevel@tonic-gate /* 20937c478bd9Sstevel@tonic-gate * Sanity check for TLS 20947c478bd9Sstevel@tonic-gate */ 20950bc07c75Srie if ((sym->st_size != 0) && ((type == STT_TLS) && 20960bc07c75Srie (sym->st_shndx != SHN_COMMON))) { 20977c478bd9Sstevel@tonic-gate Is_desc *isp = sdp->sd_isc; 20987c478bd9Sstevel@tonic-gate 20997c478bd9Sstevel@tonic-gate if ((isp == 0) || (isp->is_shdr == 0) || 21007c478bd9Sstevel@tonic-gate ((isp->is_shdr->sh_flags & SHF_TLS) == 0)) { 21015aefb655Srie eprintf(ofl->ofl_lml, ERR_FATAL, 21027c478bd9Sstevel@tonic-gate MSG_INTL(MSG_SYM_TLS), 21037c478bd9Sstevel@tonic-gate demangle(sdp->sd_name), 21047c478bd9Sstevel@tonic-gate ifl->ifl_name); 21057c478bd9Sstevel@tonic-gate ofl->ofl_flags |= FLG_OF_FATAL; 21067c478bd9Sstevel@tonic-gate continue; 21077c478bd9Sstevel@tonic-gate } 21087c478bd9Sstevel@tonic-gate } 21097c478bd9Sstevel@tonic-gate 21107c478bd9Sstevel@tonic-gate /* 21117c478bd9Sstevel@tonic-gate * Carry our some basic sanity checks (these are just 21127c478bd9Sstevel@tonic-gate * some of the erroneous symbol entries we've come 21137c478bd9Sstevel@tonic-gate * across, there's probably a lot more). The symbol 21147c478bd9Sstevel@tonic-gate * will not be carried forward to the output file, which 21157c478bd9Sstevel@tonic-gate * won't be a problem unless a relocation is required 21167c478bd9Sstevel@tonic-gate * against it. 21177c478bd9Sstevel@tonic-gate */ 21187c478bd9Sstevel@tonic-gate if (((sdp->sd_flags & FLG_SY_SPECSEC) && 21190bc07c75Srie ((sym->st_shndx == SHN_COMMON)) || 21200bc07c75Srie ((type == STT_FILE) && 21210bc07c75Srie (sym->st_shndx != SHN_ABS))) || 21227c478bd9Sstevel@tonic-gate (sdp->sd_isc && (sdp->sd_isc->is_osdesc == 0))) { 21235aefb655Srie eprintf(ofl->ofl_lml, ERR_WARNING, 21245aefb655Srie MSG_INTL(MSG_SYM_INVSHNDX), 2125*ba2be530Sab demangle_symname(name, isc->is_name, ndx), 2126*ba2be530Sab ifl->ifl_name, 2127de777a60Sab conv_sym_shndx(sym->st_shndx, &inv_buf)); 21287c478bd9Sstevel@tonic-gate sdp->sd_isc = NULL; 21297c478bd9Sstevel@tonic-gate sdp->sd_flags |= FLG_SY_INVALID; 21307c478bd9Sstevel@tonic-gate continue; 21317c478bd9Sstevel@tonic-gate } 21327c478bd9Sstevel@tonic-gate 21337c478bd9Sstevel@tonic-gate /* 21347c478bd9Sstevel@tonic-gate * As these local symbols will become part of the output 21357c478bd9Sstevel@tonic-gate * image, record their number and name string size. 21367c478bd9Sstevel@tonic-gate * Globals are counted after all input file processing 21377c478bd9Sstevel@tonic-gate * (and hence symbol resolution) is complete during 21387c478bd9Sstevel@tonic-gate * sym_validate(). 21397c478bd9Sstevel@tonic-gate */ 21407c478bd9Sstevel@tonic-gate if (!(ofl->ofl_flags1 & FLG_OF1_REDLSYM)) { 21417c478bd9Sstevel@tonic-gate ofl->ofl_locscnt++; 21427c478bd9Sstevel@tonic-gate 21437c478bd9Sstevel@tonic-gate if ((((sdp->sd_flags & FLG_SY_REGSYM) == 0) || 21447c478bd9Sstevel@tonic-gate sym->st_name) && (st_insert(ofl->ofl_strtab, 21457c478bd9Sstevel@tonic-gate sdp->sd_name) == -1)) 21467c478bd9Sstevel@tonic-gate return (S_ERROR); 21479039eeafSab 21489039eeafSab if (allow_ldynsym && sym->st_name && 2149d579eb63Sab ldynsym_symtype[type]) { 21509039eeafSab ofl->ofl_dynlocscnt++; 21519039eeafSab if (st_insert(ofl->ofl_dynstrtab, 21529039eeafSab sdp->sd_name) == -1) 21539039eeafSab return (S_ERROR); 2154d579eb63Sab /* Include it in sort section? */ 2155d579eb63Sab DYNSORT_COUNT(sdp, sym, type, ++); 21569039eeafSab } 21577c478bd9Sstevel@tonic-gate } 21587c478bd9Sstevel@tonic-gate } 21597c478bd9Sstevel@tonic-gate } 21607c478bd9Sstevel@tonic-gate 2161d840867fSab /* 2162d840867fSab * The GNU ld interprets the top bit of the 16-bit Versym value 2163d840867fSab * (0x8000) as the "hidden" bit. If this bit is set, the linker 2164d840867fSab * is supposed to act as if that symbol does not exist. The Solaris 2165d840867fSab * linker does not support this mechanism, or the model of interface 2166d840867fSab * evolution that it allows, but we honor it in GNU ld produced 2167d840867fSab * objects in order to interoperate with them. 2168d840867fSab * 2169d840867fSab * Determine if we should honor the GNU hidden bit for this file. 2170d840867fSab */ 2171d840867fSab test_gnu_hidden_bit = ((ifl->ifl_flags & FLG_IF_GNUVER) != 0) && 2172d840867fSab (ifl->ifl_versym != NULL); 2173d840867fSab 21747c478bd9Sstevel@tonic-gate /* 21757c478bd9Sstevel@tonic-gate * Now scan the global symbols entering them in the internal symbol 21767c478bd9Sstevel@tonic-gate * table or resolving them as necessary. 21777c478bd9Sstevel@tonic-gate */ 21787c478bd9Sstevel@tonic-gate sym = (Sym *)isc->is_indata->d_buf; 21797c478bd9Sstevel@tonic-gate sym += local; 21807c478bd9Sstevel@tonic-gate /* LINTED */ 21817c478bd9Sstevel@tonic-gate for (ndx = (int)local; ndx < total; sym++, ndx++) { 21827c478bd9Sstevel@tonic-gate const char *name; 21837c478bd9Sstevel@tonic-gate Word shndx, sdflags = 0; 2184*ba2be530Sab int shndx_bad = 0; 21857c478bd9Sstevel@tonic-gate 21867c478bd9Sstevel@tonic-gate /* 2187*ba2be530Sab * Determine and validate the associated section index. 21887c478bd9Sstevel@tonic-gate */ 21897c478bd9Sstevel@tonic-gate if (symshndx && (sym->st_shndx == SHN_XINDEX)) { 21907c478bd9Sstevel@tonic-gate shndx = symshndx[ndx]; 2191*ba2be530Sab } else if ((shndx = sym->st_shndx) >= SHN_LORESERVE) { 2192*ba2be530Sab sdflags |= FLG_SY_SPECSEC; 2193*ba2be530Sab } else if (shndx > ifl->ifl_ehdr->e_shnum) { 2194*ba2be530Sab /* We need the name before we can issue error */ 2195*ba2be530Sab shndx_bad = 1; 21967c478bd9Sstevel@tonic-gate } 21977c478bd9Sstevel@tonic-gate 21987c478bd9Sstevel@tonic-gate /* 21997c478bd9Sstevel@tonic-gate * Check if st_name has a valid value or not. 22007c478bd9Sstevel@tonic-gate */ 22015aefb655Srie if ((name = string(ofl, ifl, sym, strs, strsize, ndx, shndx, 22027c478bd9Sstevel@tonic-gate symsecname, strsecname, &sdflags)) == 0) { 22037c478bd9Sstevel@tonic-gate ofl->ofl_flags |= FLG_OF_FATAL; 22047c478bd9Sstevel@tonic-gate continue; 22057c478bd9Sstevel@tonic-gate } 22067c478bd9Sstevel@tonic-gate 2207*ba2be530Sab /* 2208*ba2be530Sab * Now that we have the name, if the section index 2209*ba2be530Sab * was bad, report it. 2210*ba2be530Sab */ 2211*ba2be530Sab if (shndx_bad) { 2212*ba2be530Sab eprintf(ofl->ofl_lml, ERR_WARNING, 2213*ba2be530Sab MSG_INTL(MSG_SYM_INVSHNDX), 2214*ba2be530Sab demangle_symname(name, isc->is_name, ndx), 2215*ba2be530Sab ifl->ifl_name, 2216*ba2be530Sab conv_sym_shndx(sym->st_shndx, &inv_buf)); 2217*ba2be530Sab continue; 2218*ba2be530Sab } 2219*ba2be530Sab 2220*ba2be530Sab 22213b41b08bSab /* 2222d840867fSab * Test for the GNU hidden bit, and ignore symbols that 2223d840867fSab * have it set. 22243b41b08bSab */ 2225d840867fSab if (test_gnu_hidden_bit && 2226d840867fSab ((ifl->ifl_versym[ndx] & 0x8000) != 0)) 22273b41b08bSab continue; 22283b41b08bSab 22297c478bd9Sstevel@tonic-gate /* 22307c478bd9Sstevel@tonic-gate * The linker itself will generate symbols for _end, _etext, 22317c478bd9Sstevel@tonic-gate * _edata, _DYNAMIC and _PROCEDURE_LINKAGE_TABLE_, so don't 22327c478bd9Sstevel@tonic-gate * bother entering these symbols from shared objects. This 22337c478bd9Sstevel@tonic-gate * results in some wasted resolution processing, which is hard 22347c478bd9Sstevel@tonic-gate * to feel, but if nothing else, pollutes diagnostic relocation 22357c478bd9Sstevel@tonic-gate * output. 22367c478bd9Sstevel@tonic-gate */ 22377c478bd9Sstevel@tonic-gate if (name[0] && (etype == ET_DYN) && (sym->st_size == 0) && 22387c478bd9Sstevel@tonic-gate (ELF_ST_TYPE(sym->st_info) == STT_OBJECT) && 22397c478bd9Sstevel@tonic-gate (name[0] == '_') && ((name[1] == 'e') || 22407c478bd9Sstevel@tonic-gate (name[1] == 'D') || (name[1] == 'P')) && 22417c478bd9Sstevel@tonic-gate ((strcmp(name, MSG_ORIG(MSG_SYM_ETEXT_U)) == 0) || 22427c478bd9Sstevel@tonic-gate (strcmp(name, MSG_ORIG(MSG_SYM_EDATA_U)) == 0) || 22437c478bd9Sstevel@tonic-gate (strcmp(name, MSG_ORIG(MSG_SYM_END_U)) == 0) || 22447c478bd9Sstevel@tonic-gate (strcmp(name, MSG_ORIG(MSG_SYM_DYNAMIC_U)) == 0) || 22457c478bd9Sstevel@tonic-gate (strcmp(name, MSG_ORIG(MSG_SYM_PLKTBL_U)) == 0))) { 22467c478bd9Sstevel@tonic-gate ifl->ifl_oldndx[ndx] = 0; 22477c478bd9Sstevel@tonic-gate continue; 22487c478bd9Sstevel@tonic-gate } 22497c478bd9Sstevel@tonic-gate 22507c478bd9Sstevel@tonic-gate /* 22517c478bd9Sstevel@tonic-gate * Determine and validate the symbols binding. 22527c478bd9Sstevel@tonic-gate */ 22537c478bd9Sstevel@tonic-gate bind = ELF_ST_BIND(sym->st_info); 22547c478bd9Sstevel@tonic-gate if ((bind != STB_GLOBAL) && (bind != STB_WEAK)) { 22555aefb655Srie eprintf(ofl->ofl_lml, ERR_WARNING, 2256*ba2be530Sab MSG_INTL(MSG_SYM_NONGLOB), 2257*ba2be530Sab demangle_symname(name, isc->is_name, ndx), 2258de777a60Sab ifl->ifl_name, 2259de777a60Sab conv_sym_info_bind(bind, 0, &inv_buf)); 22607c478bd9Sstevel@tonic-gate continue; 22617c478bd9Sstevel@tonic-gate } 22627c478bd9Sstevel@tonic-gate 22637c478bd9Sstevel@tonic-gate /* 22647c478bd9Sstevel@tonic-gate * If this symbol falls within the range of a section being 22657c478bd9Sstevel@tonic-gate * discarded, then discard the symbol itself. 22667c478bd9Sstevel@tonic-gate */ 22677c478bd9Sstevel@tonic-gate if (((sdflags & FLG_SY_SPECSEC) == 0) && 22680bc07c75Srie (sym->st_shndx != SHN_UNDEF)) { 22697c478bd9Sstevel@tonic-gate Is_desc *isp; 22707c478bd9Sstevel@tonic-gate 22717c478bd9Sstevel@tonic-gate if (shndx >= ifl->ifl_shnum) { 22727c478bd9Sstevel@tonic-gate /* 22737c478bd9Sstevel@tonic-gate * Carry our some basic sanity checks 22747c478bd9Sstevel@tonic-gate * The symbol will not be carried forward to 22757c478bd9Sstevel@tonic-gate * the output file, which won't be a problem 22767c478bd9Sstevel@tonic-gate * unless a relocation is required against it. 22777c478bd9Sstevel@tonic-gate */ 22785aefb655Srie eprintf(ofl->ofl_lml, ERR_WARNING, 2279*ba2be530Sab MSG_INTL(MSG_SYM_INVSHNDX), 2280*ba2be530Sab demangle_symname(name, isc->is_name, ndx), 22810bc07c75Srie ifl->ifl_name, 2282de777a60Sab conv_sym_shndx(sym->st_shndx, &inv_buf)); 22837c478bd9Sstevel@tonic-gate continue; 22847c478bd9Sstevel@tonic-gate } 22857c478bd9Sstevel@tonic-gate 22867c478bd9Sstevel@tonic-gate isp = ifl->ifl_isdesc[shndx]; 22877c478bd9Sstevel@tonic-gate if (isp && (isp->is_flags & FLG_IS_DISCARD)) { 22887c478bd9Sstevel@tonic-gate if ((sdp = 22897c478bd9Sstevel@tonic-gate libld_calloc(sizeof (Sym_desc), 1)) == 0) 22907c478bd9Sstevel@tonic-gate return (S_ERROR); 22917c478bd9Sstevel@tonic-gate 22927c478bd9Sstevel@tonic-gate /* 22937c478bd9Sstevel@tonic-gate * Create a dummy symbol entry so that if we 22947c478bd9Sstevel@tonic-gate * find any references to this discarded symbol 22957c478bd9Sstevel@tonic-gate * we can compensate. 22967c478bd9Sstevel@tonic-gate */ 22977c478bd9Sstevel@tonic-gate sdp->sd_name = name; 22987c478bd9Sstevel@tonic-gate sdp->sd_sym = sym; 22997c478bd9Sstevel@tonic-gate sdp->sd_file = ifl; 23007c478bd9Sstevel@tonic-gate sdp->sd_isc = isp; 23017c478bd9Sstevel@tonic-gate sdp->sd_flags = FLG_SY_ISDISC; 23027c478bd9Sstevel@tonic-gate ifl->ifl_oldndx[ndx] = sdp; 23037c478bd9Sstevel@tonic-gate 2304a194faf8Srie DBG_CALL(Dbg_syms_discarded(ofl->ofl_lml, sdp)); 23057c478bd9Sstevel@tonic-gate continue; 23067c478bd9Sstevel@tonic-gate } 23077c478bd9Sstevel@tonic-gate } 23087c478bd9Sstevel@tonic-gate 23097c478bd9Sstevel@tonic-gate /* 23107c478bd9Sstevel@tonic-gate * If the symbol does not already exist in the internal symbol 23117c478bd9Sstevel@tonic-gate * table add it, otherwise resolve the conflict. If the symbol 23127c478bd9Sstevel@tonic-gate * from this file is kept, retain its symbol table index for 23137c478bd9Sstevel@tonic-gate * possible use in associating a global alias. 23147c478bd9Sstevel@tonic-gate */ 23157c478bd9Sstevel@tonic-gate /* LINTED */ 23167c478bd9Sstevel@tonic-gate hash = (Word)elf_hash((const char *)name); 23175aefb655Srie if ((sdp = ld_sym_find(name, hash, &where, ofl)) == NULL) { 23185aefb655Srie DBG_CALL(Dbg_syms_global(ofl->ofl_lml, ndx, name)); 23195aefb655Srie if ((sdp = ld_sym_enter(name, sym, hash, ifl, ofl, ndx, 23207c478bd9Sstevel@tonic-gate shndx, sdflags, 0, &where)) == (Sym_desc *)S_ERROR) 23217c478bd9Sstevel@tonic-gate return (S_ERROR); 23227c478bd9Sstevel@tonic-gate 23235aefb655Srie } else if (ld_sym_resolve(sdp, sym, ifl, ofl, ndx, shndx, 23247c478bd9Sstevel@tonic-gate sdflags) == S_ERROR) 23257c478bd9Sstevel@tonic-gate return (S_ERROR); 23267c478bd9Sstevel@tonic-gate 23277c478bd9Sstevel@tonic-gate /* 23287c478bd9Sstevel@tonic-gate * After we've compared a defined symbol in one shared 23297c478bd9Sstevel@tonic-gate * object, flag the symbol so we don't compare it again. 23307c478bd9Sstevel@tonic-gate */ 23310bc07c75Srie if ((etype == ET_DYN) && (sym->st_shndx != SHN_UNDEF) && 23327c478bd9Sstevel@tonic-gate ((sdp->sd_flags & FLG_SY_SOFOUND) == 0)) 23337c478bd9Sstevel@tonic-gate sdp->sd_flags |= FLG_SY_SOFOUND; 23347c478bd9Sstevel@tonic-gate 23357c478bd9Sstevel@tonic-gate /* 23367c478bd9Sstevel@tonic-gate * If the symbol is accepted from this file retain the symbol 23377c478bd9Sstevel@tonic-gate * index for possible use in aliasing. 23387c478bd9Sstevel@tonic-gate */ 23397c478bd9Sstevel@tonic-gate if (sdp->sd_file == ifl) 23407c478bd9Sstevel@tonic-gate sdp->sd_symndx = ndx; 23417c478bd9Sstevel@tonic-gate 23427c478bd9Sstevel@tonic-gate ifl->ifl_oldndx[ndx] = sdp; 23437c478bd9Sstevel@tonic-gate 23447c478bd9Sstevel@tonic-gate /* 23457c478bd9Sstevel@tonic-gate * If we've accepted a register symbol, continue to validate 23467c478bd9Sstevel@tonic-gate * it. 23477c478bd9Sstevel@tonic-gate */ 23487c478bd9Sstevel@tonic-gate if (sdp->sd_flags & FLG_SY_REGSYM) { 23497c478bd9Sstevel@tonic-gate Sym_desc *rsdp; 23507c478bd9Sstevel@tonic-gate 2351*ba2be530Sab /* 2352*ba2be530Sab * The presence of FLG_SY_REGSYM means that 2353*ba2be530Sab * the pointers in ld_targ.t_ms are non-NULL. 2354*ba2be530Sab */ 2355*ba2be530Sab rsdp = (*ld_targ.t_ms.ms_reg_find)(sdp->sd_sym, ofl); 2356*ba2be530Sab if (rsdp == 0) { 2357*ba2be530Sab if ((*ld_targ.t_ms.ms_reg_enter)(sdp, ofl) == 0) 23587c478bd9Sstevel@tonic-gate return (S_ERROR); 23597c478bd9Sstevel@tonic-gate } else if (rsdp != sdp) { 2360*ba2be530Sab (void) (*ld_targ.t_ms.ms_reg_check)(rsdp, 2361*ba2be530Sab sdp->sd_sym, sdp->sd_name, ifl, ofl); 23627c478bd9Sstevel@tonic-gate } 23637c478bd9Sstevel@tonic-gate } 236475e45495Sab 236575e45495Sab /* 236675e45495Sab * For a relocatable object, if this symbol is defined 236775e45495Sab * and has non-zero length and references an address 236875e45495Sab * within an associated section, then check its extents 236975e45495Sab * to make sure the section boundaries encompass it. 237075e45495Sab * If they don't, the ELF file is corrupt. Note that this 237175e45495Sab * global symbol may have come from another file to satisfy 237275e45495Sab * an UNDEF symbol of the same name from this one. In that 237375e45495Sab * case, we don't check it, because it was already checked 237475e45495Sab * as part of its own file. 237575e45495Sab */ 237675e45495Sab if (etype_rel && (sdp->sd_file == ifl)) { 237775e45495Sab Sym *tsym = sdp->sd_sym; 237875e45495Sab 237975e45495Sab if (SYM_LOC_BADADDR(sdp, tsym, 238075e45495Sab ELF_ST_TYPE(tsym->st_info))) { 238169a0bf0cSab issue_badaddr_msg(ifl, ofl, sdp, 238269a0bf0cSab tsym, tsym->st_shndx); 238375e45495Sab continue; 238475e45495Sab } 238575e45495Sab } 23867c478bd9Sstevel@tonic-gate } 23877c478bd9Sstevel@tonic-gate 23887c478bd9Sstevel@tonic-gate /* 23897c478bd9Sstevel@tonic-gate * If this is a shared object scan the globals one more time and 23907c478bd9Sstevel@tonic-gate * associate any weak/global associations. This association is needed 23917c478bd9Sstevel@tonic-gate * should the weak definition satisfy a reference in the dynamic 23927c478bd9Sstevel@tonic-gate * executable: 23937c478bd9Sstevel@tonic-gate * 23947c478bd9Sstevel@tonic-gate * o if the symbol is a data item it will be copied to the 23957c478bd9Sstevel@tonic-gate * executables address space, thus we must also reassociate the 23967c478bd9Sstevel@tonic-gate * alias symbol with its new location in the executable. 23977c478bd9Sstevel@tonic-gate * 23987c478bd9Sstevel@tonic-gate * o if the symbol is a function then we may need to promote the 23997c478bd9Sstevel@tonic-gate * symbols binding from undefined weak to undefined, otherwise the 24007c478bd9Sstevel@tonic-gate * run-time linker will not generate the correct relocation error 24017c478bd9Sstevel@tonic-gate * should the symbol not be found. 24027c478bd9Sstevel@tonic-gate * 24037c478bd9Sstevel@tonic-gate * The true association between a weak/strong symbol pair is that both 24047c478bd9Sstevel@tonic-gate * symbol entries are identical, thus first we created a sorted symbol 24057c478bd9Sstevel@tonic-gate * list keyed off of the symbols value (if the value is the same chances 24067c478bd9Sstevel@tonic-gate * are the rest of the symbols data is). This list is then scanned for 24077c478bd9Sstevel@tonic-gate * weak symbols, and if one is found then any strong association will 24087c478bd9Sstevel@tonic-gate * exist in the following entries. Thus we just have to scan one 24097c478bd9Sstevel@tonic-gate * (typical single alias) or more (in the uncommon instance of multiple 24107c478bd9Sstevel@tonic-gate * weak to strong associations) entries to determine if a match exists. 24117c478bd9Sstevel@tonic-gate */ 2412d579eb63Sab if ((OFL_ALLOW_LDYNSYM(ofl) || (etype == ET_DYN)) && 2413d579eb63Sab (total > local)) { 24147c478bd9Sstevel@tonic-gate Sym_desc ** sort; 24157c478bd9Sstevel@tonic-gate size_t size = (total - local) * sizeof (Sym_desc *); 24167c478bd9Sstevel@tonic-gate 24177c478bd9Sstevel@tonic-gate if ((sort = libld_malloc(size)) == 0) 24187c478bd9Sstevel@tonic-gate return (S_ERROR); 24197c478bd9Sstevel@tonic-gate (void) memcpy((void *)sort, &ifl->ifl_oldndx[local], size); 24207c478bd9Sstevel@tonic-gate 24217c478bd9Sstevel@tonic-gate qsort(sort, (total - local), sizeof (Sym_desc *), compare); 24227c478bd9Sstevel@tonic-gate 24237c478bd9Sstevel@tonic-gate for (ndx = 0; ndx < (total - local); ndx++) { 24247c478bd9Sstevel@tonic-gate Sym_desc * wsdp = sort[ndx]; 24257c478bd9Sstevel@tonic-gate Sym * wsym; 24267c478bd9Sstevel@tonic-gate int sndx; 24277c478bd9Sstevel@tonic-gate 24287c478bd9Sstevel@tonic-gate if (wsdp == 0) 24297c478bd9Sstevel@tonic-gate continue; 24307c478bd9Sstevel@tonic-gate 24317c478bd9Sstevel@tonic-gate wsym = wsdp->sd_sym; 24327c478bd9Sstevel@tonic-gate 24337c478bd9Sstevel@tonic-gate if ((ELF_ST_BIND(wsym->st_info) != STB_WEAK) || 24340bc07c75Srie (wsdp->sd_sym->st_shndx == SHN_UNDEF) || 24357c478bd9Sstevel@tonic-gate (wsdp->sd_flags & FLG_SY_SPECSEC)) 24367c478bd9Sstevel@tonic-gate continue; 24377c478bd9Sstevel@tonic-gate 24387c478bd9Sstevel@tonic-gate /* 24397c478bd9Sstevel@tonic-gate * We have a weak symbol, if it has a strong alias it 24407c478bd9Sstevel@tonic-gate * will have been sorted to one of the following sort 24417c478bd9Sstevel@tonic-gate * table entries. Note that we could have multiple weak 24427c478bd9Sstevel@tonic-gate * symbols aliased to one strong (if this occurs then 24437c478bd9Sstevel@tonic-gate * the strong symbol only maintains one alias back to 24447c478bd9Sstevel@tonic-gate * the last weak). 24457c478bd9Sstevel@tonic-gate */ 24467c478bd9Sstevel@tonic-gate for (sndx = ndx + 1; sndx < (total - local); sndx++) { 24477c478bd9Sstevel@tonic-gate Sym_desc * ssdp = sort[sndx]; 24487c478bd9Sstevel@tonic-gate Sym * ssym; 24497c478bd9Sstevel@tonic-gate 24507c478bd9Sstevel@tonic-gate if (ssdp == 0) 24517c478bd9Sstevel@tonic-gate break; 24527c478bd9Sstevel@tonic-gate 24537c478bd9Sstevel@tonic-gate ssym = ssdp->sd_sym; 24547c478bd9Sstevel@tonic-gate 24557c478bd9Sstevel@tonic-gate if (wsym->st_value != ssym->st_value) 24567c478bd9Sstevel@tonic-gate break; 24577c478bd9Sstevel@tonic-gate 24587c478bd9Sstevel@tonic-gate if ((ssdp->sd_file == ifl) && 24597c478bd9Sstevel@tonic-gate (wsdp->sd_file == ifl) && 24607c478bd9Sstevel@tonic-gate (wsym->st_size == ssym->st_size) && 24610bc07c75Srie (ssdp->sd_sym->st_shndx != SHN_UNDEF) && 24627c478bd9Sstevel@tonic-gate (ELF_ST_BIND(ssym->st_info) != STB_WEAK) && 24637c478bd9Sstevel@tonic-gate ((ssdp->sd_flags & FLG_SY_SPECSEC) == 0)) { 2464d579eb63Sab int w_dynbits, s_dynbits; 2465d579eb63Sab 2466d579eb63Sab /* 2467d579eb63Sab * If a sharable object, set link 2468d579eb63Sab * fields so they reference each other 2469d579eb63Sab */ 2470d579eb63Sab if (etype == ET_DYN) { 2471d579eb63Sab ssdp->sd_aux->sa_linkndx = 2472d579eb63Sab (Word)wsdp->sd_symndx; 2473d579eb63Sab wsdp->sd_aux->sa_linkndx = 2474d579eb63Sab (Word)ssdp->sd_symndx; 2475d579eb63Sab } 2476d579eb63Sab /* 2477d579eb63Sab * Determine which of these two symbols 2478d579eb63Sab * go into the sort section. If the 2479d579eb63Sab * mapfile has made explicit settings 2480d579eb63Sab * of the FLG_SY_*DYNSORT flags for both 2481d579eb63Sab * symbols, then we do what they say. 2482d579eb63Sab * If one has the DYNSORT flags set, 2483d579eb63Sab * we set the NODYNSORT bit in the 2484d579eb63Sab * other. And if neither has an 2485d579eb63Sab * explicit setting, then we favor the 2486d579eb63Sab * weak symbol because they usually 2487d579eb63Sab * lack the leading underscore. 2488d579eb63Sab */ 2489d579eb63Sab w_dynbits = wsdp->sd_flags & 2490d579eb63Sab (FLG_SY_DYNSORT | FLG_SY_NODYNSORT); 2491d579eb63Sab s_dynbits = ssdp->sd_flags & 2492d579eb63Sab (FLG_SY_DYNSORT | FLG_SY_NODYNSORT); 2493d579eb63Sab if (!(w_dynbits && s_dynbits)) { 249433eb6ee1Sab if (s_dynbits) { 249533eb6ee1Sab if (s_dynbits == 249633eb6ee1Sab FLG_SY_DYNSORT) 249733eb6ee1Sab wsdp->sd_flags |= 249833eb6ee1Sab FLG_SY_NODYNSORT; 249933eb6ee1Sab } else if (w_dynbits != 250033eb6ee1Sab FLG_SY_NODYNSORT) { 250133eb6ee1Sab ssdp->sd_flags |= 250233eb6ee1Sab FLG_SY_NODYNSORT; 250333eb6ee1Sab } 2504d579eb63Sab } 25057c478bd9Sstevel@tonic-gate break; 25067c478bd9Sstevel@tonic-gate } 25077c478bd9Sstevel@tonic-gate } 25087c478bd9Sstevel@tonic-gate } 25097c478bd9Sstevel@tonic-gate } 25107c478bd9Sstevel@tonic-gate return (1); 251175e45495Sab 251275e45495Sab #undef SYM_LOC_BADADDR 25137c478bd9Sstevel@tonic-gate } 25147c478bd9Sstevel@tonic-gate 25157c478bd9Sstevel@tonic-gate /* 2516f5a18a30Srie * Add an undefined symbol to the symbol table. The reference originates from 2517f5a18a30Srie * the location identifed by the message id (mid). These references can 2518f5a18a30Srie * originate from command line options such as -e, -u, -initarray, etc. 2519f5a18a30Srie * (identified with MSG_INTL(MSG_STR_COMMAND)), or from internally generated 2520f5a18a30Srie * TLS relocation references (identified with MSG_INTL(MSG_STR_TLSREL)). 25217c478bd9Sstevel@tonic-gate */ 25227c478bd9Sstevel@tonic-gate Sym_desc * 2523f5a18a30Srie ld_sym_add_u(const char *name, Ofl_desc *ofl, Msg mid) 25247c478bd9Sstevel@tonic-gate { 25257c478bd9Sstevel@tonic-gate Sym *sym; 25267c478bd9Sstevel@tonic-gate Ifl_desc *ifl = 0, *_ifl; 25277c478bd9Sstevel@tonic-gate Sym_desc *sdp; 25287c478bd9Sstevel@tonic-gate Word hash; 25297c478bd9Sstevel@tonic-gate Listnode *lnp; 25307c478bd9Sstevel@tonic-gate avl_index_t where; 2531f5a18a30Srie const char *reference = MSG_INTL(mid); 25327c478bd9Sstevel@tonic-gate 25337c478bd9Sstevel@tonic-gate /* 2534b02637afSrie * As an optimization, determine whether we've already generated this 2535b02637afSrie * reference. If the symbol doesn't already exist we'll create it. 2536b02637afSrie * Or if the symbol does exist from a different source, we'll resolve 2537b02637afSrie * the conflict. 25387c478bd9Sstevel@tonic-gate */ 25397c478bd9Sstevel@tonic-gate /* LINTED */ 25407c478bd9Sstevel@tonic-gate hash = (Word)elf_hash(name); 2541b02637afSrie if ((sdp = ld_sym_find(name, hash, &where, ofl)) != NULL) { 2542b02637afSrie if ((sdp->sd_sym->st_shndx == SHN_UNDEF) && 2543b02637afSrie (sdp->sd_file->ifl_name == reference)) 2544b02637afSrie return (sdp); 25457c478bd9Sstevel@tonic-gate } 25467c478bd9Sstevel@tonic-gate 25477c478bd9Sstevel@tonic-gate /* 25487c478bd9Sstevel@tonic-gate * Determine whether a pseudo input file descriptor exists to represent 25497c478bd9Sstevel@tonic-gate * the command line, as any global symbol needs an input file descriptor 25507c478bd9Sstevel@tonic-gate * during any symbol resolution (refer to map_ifl() which provides a 25517c478bd9Sstevel@tonic-gate * similar method for adding symbols from mapfiles). 25527c478bd9Sstevel@tonic-gate */ 25537c478bd9Sstevel@tonic-gate for (LIST_TRAVERSE(&ofl->ofl_objs, lnp, _ifl)) 2554f5a18a30Srie if (strcmp(_ifl->ifl_name, reference) == 0) { 25557c478bd9Sstevel@tonic-gate ifl = _ifl; 25567c478bd9Sstevel@tonic-gate break; 25577c478bd9Sstevel@tonic-gate } 25587c478bd9Sstevel@tonic-gate 25597c478bd9Sstevel@tonic-gate /* 25607c478bd9Sstevel@tonic-gate * If no descriptor exists create one. 25617c478bd9Sstevel@tonic-gate */ 25627c478bd9Sstevel@tonic-gate if (ifl == 0) { 25637c478bd9Sstevel@tonic-gate if ((ifl = libld_calloc(sizeof (Ifl_desc), 1)) == 25647c478bd9Sstevel@tonic-gate (Ifl_desc *)0) 25657c478bd9Sstevel@tonic-gate return ((Sym_desc *)S_ERROR); 2566f5a18a30Srie ifl->ifl_name = reference; 25677c478bd9Sstevel@tonic-gate ifl->ifl_flags = FLG_IF_NEEDED | FLG_IF_FILEREF; 25687c478bd9Sstevel@tonic-gate if ((ifl->ifl_ehdr = libld_calloc(sizeof (Ehdr), 25697c478bd9Sstevel@tonic-gate 1)) == 0) 25707c478bd9Sstevel@tonic-gate return ((Sym_desc *)S_ERROR); 25717c478bd9Sstevel@tonic-gate ifl->ifl_ehdr->e_type = ET_REL; 25727c478bd9Sstevel@tonic-gate 25737c478bd9Sstevel@tonic-gate if (list_appendc(&ofl->ofl_objs, ifl) == 0) 25747c478bd9Sstevel@tonic-gate return ((Sym_desc *)S_ERROR); 25757c478bd9Sstevel@tonic-gate } 25767c478bd9Sstevel@tonic-gate 25777c478bd9Sstevel@tonic-gate /* 25787c478bd9Sstevel@tonic-gate * Allocate a symbol structure and add it to the global symbol table. 25797c478bd9Sstevel@tonic-gate */ 25807c478bd9Sstevel@tonic-gate if ((sym = libld_calloc(sizeof (Sym), 1)) == 0) 25817c478bd9Sstevel@tonic-gate return ((Sym_desc *)S_ERROR); 25827c478bd9Sstevel@tonic-gate sym->st_info = ELF_ST_INFO(STB_GLOBAL, STT_NOTYPE); 25837c478bd9Sstevel@tonic-gate sym->st_shndx = SHN_UNDEF; 25847c478bd9Sstevel@tonic-gate 25855aefb655Srie DBG_CALL(Dbg_syms_process(ofl->ofl_lml, ifl)); 2586b02637afSrie if (sdp == NULL) { 2587b02637afSrie DBG_CALL(Dbg_syms_global(ofl->ofl_lml, 0, name)); 2588b02637afSrie if ((sdp = ld_sym_enter(name, sym, hash, ifl, ofl, 0, SHN_UNDEF, 2589b02637afSrie 0, 0, &where)) == (Sym_desc *)S_ERROR) 2590b02637afSrie return ((Sym_desc *)S_ERROR); 2591b02637afSrie } else if (ld_sym_resolve(sdp, sym, ifl, ofl, 0, 2592b02637afSrie SHN_UNDEF, 0) == S_ERROR) 2593b02637afSrie return ((Sym_desc *)S_ERROR); 2594b02637afSrie 25957c478bd9Sstevel@tonic-gate sdp->sd_flags &= ~FLG_SY_CLEAN; 25967c478bd9Sstevel@tonic-gate sdp->sd_flags |= FLG_SY_CMDREF; 25977c478bd9Sstevel@tonic-gate 25987c478bd9Sstevel@tonic-gate return (sdp); 25997c478bd9Sstevel@tonic-gate } 2600