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 * 2769112eddSAli Bahrami * Copyright 2010 Sun Microsystems, Inc. All rights reserved. 287c478bd9Sstevel@tonic-gate * Use is subject to license terms. 297c478bd9Sstevel@tonic-gate */ 307c478bd9Sstevel@tonic-gate 317c478bd9Sstevel@tonic-gate /* 327c478bd9Sstevel@tonic-gate * Symbol table management routines 337c478bd9Sstevel@tonic-gate */ 34ba2be530Sab 35ba2be530Sab #define ELF_TARGET_AMD64 36ba2be530Sab 377c478bd9Sstevel@tonic-gate #include <stdio.h> 387c478bd9Sstevel@tonic-gate #include <string.h> 395aefb655Srie #include <debug.h> 407c478bd9Sstevel@tonic-gate #include "msg.h" 417c478bd9Sstevel@tonic-gate #include "_libld.h" 427c478bd9Sstevel@tonic-gate 437c478bd9Sstevel@tonic-gate /* 447c478bd9Sstevel@tonic-gate * AVL tree comparator function: 457c478bd9Sstevel@tonic-gate * 466b3ba5bdSAli Bahrami * The primary key is the symbol name hash with a secondary key of the symbol 476b3ba5bdSAli Bahrami * name itself. 487c478bd9Sstevel@tonic-gate */ 497c478bd9Sstevel@tonic-gate int 505aefb655Srie ld_sym_avl_comp(const void *elem1, const void *elem2) 517c478bd9Sstevel@tonic-gate { 527c478bd9Sstevel@tonic-gate Sym_avlnode *sav1 = (Sym_avlnode *)elem1; 537c478bd9Sstevel@tonic-gate Sym_avlnode *sav2 = (Sym_avlnode *)elem2; 546b3ba5bdSAli Bahrami int res; 557c478bd9Sstevel@tonic-gate 567c478bd9Sstevel@tonic-gate res = sav1->sav_hash - sav2->sav_hash; 577c478bd9Sstevel@tonic-gate 587c478bd9Sstevel@tonic-gate if (res < 0) 597c478bd9Sstevel@tonic-gate return (-1); 607c478bd9Sstevel@tonic-gate if (res > 0) 617c478bd9Sstevel@tonic-gate return (1); 627c478bd9Sstevel@tonic-gate 637c478bd9Sstevel@tonic-gate /* 647c478bd9Sstevel@tonic-gate * Hash is equal - now compare name 657c478bd9Sstevel@tonic-gate */ 667c478bd9Sstevel@tonic-gate res = strcmp(sav1->sav_name, sav2->sav_name); 677c478bd9Sstevel@tonic-gate if (res == 0) 687c478bd9Sstevel@tonic-gate return (0); 697c478bd9Sstevel@tonic-gate if (res > 0) 707c478bd9Sstevel@tonic-gate return (1); 717c478bd9Sstevel@tonic-gate return (-1); 727c478bd9Sstevel@tonic-gate } 737c478bd9Sstevel@tonic-gate 747c478bd9Sstevel@tonic-gate /* 757c478bd9Sstevel@tonic-gate * Focal point for verifying symbol names. 767c478bd9Sstevel@tonic-gate */ 77a194faf8Srie inline static const char * 785aefb655Srie string(Ofl_desc *ofl, Ifl_desc *ifl, Sym *sym, const char *strs, size_t strsize, 794a8d0ea7SAli Bahrami int symndx, Word shndx, Word symsecndx, const char *symsecname, 80635216b6SRod Evans const char *strsecname, sd_flag_t *flags) 817c478bd9Sstevel@tonic-gate { 826b3ba5bdSAli Bahrami Word name = sym->st_name; 837c478bd9Sstevel@tonic-gate 847c478bd9Sstevel@tonic-gate if (name) { 857c478bd9Sstevel@tonic-gate if ((ifl->ifl_flags & FLG_IF_HSTRTAB) == 0) { 865aefb655Srie eprintf(ofl->ofl_lml, ERR_FATAL, 875aefb655Srie MSG_INTL(MSG_FIL_NOSTRTABLE), ifl->ifl_name, 884a8d0ea7SAli Bahrami EC_WORD(symsecndx), symsecname, symndx, 894a8d0ea7SAli Bahrami EC_XWORD(name)); 906b3ba5bdSAli Bahrami return (NULL); 917c478bd9Sstevel@tonic-gate } 927c478bd9Sstevel@tonic-gate if (name >= (Word)strsize) { 935aefb655Srie eprintf(ofl->ofl_lml, ERR_FATAL, 945aefb655Srie MSG_INTL(MSG_FIL_EXCSTRTABLE), ifl->ifl_name, 954a8d0ea7SAli Bahrami EC_WORD(symsecndx), symsecname, symndx, 964a8d0ea7SAli Bahrami EC_XWORD(name), strsecname, EC_XWORD(strsize)); 976b3ba5bdSAli Bahrami return (NULL); 987c478bd9Sstevel@tonic-gate } 997c478bd9Sstevel@tonic-gate } 1007c478bd9Sstevel@tonic-gate 1017c478bd9Sstevel@tonic-gate /* 1027c478bd9Sstevel@tonic-gate * Determine if we're dealing with a register and if so validate it. 1037c478bd9Sstevel@tonic-gate * If it's a scratch register, a fabricated name will be returned. 1047c478bd9Sstevel@tonic-gate */ 105ba2be530Sab if (ld_targ.t_ms.ms_is_regsym != NULL) { 106ba2be530Sab const char *regname = (*ld_targ.t_ms.ms_is_regsym)(ofl, ifl, 107ba2be530Sab sym, strs, symndx, shndx, symsecname, flags); 108ba2be530Sab 109ba2be530Sab if (regname == (const char *)S_ERROR) { 1106b3ba5bdSAli Bahrami return (NULL); 111ba2be530Sab } 112ba2be530Sab if (regname) 113ba2be530Sab return (regname); 1147c478bd9Sstevel@tonic-gate } 1157c478bd9Sstevel@tonic-gate 1167c478bd9Sstevel@tonic-gate /* 1177c478bd9Sstevel@tonic-gate * If this isn't a register, but we have a global symbol with a null 1187c478bd9Sstevel@tonic-gate * name, we're not going to be able to hash this, search for it, or 1197c478bd9Sstevel@tonic-gate * do anything interesting. However, we've been accepting a symbol of 1207c478bd9Sstevel@tonic-gate * this kind for ages now, so give the user a warning (rather than a 1217c478bd9Sstevel@tonic-gate * fatal error), just in case this instance exists somewhere in the 1227c478bd9Sstevel@tonic-gate * world and hasn't, as yet, been a problem. 1237c478bd9Sstevel@tonic-gate */ 1247c478bd9Sstevel@tonic-gate if ((name == 0) && (ELF_ST_BIND(sym->st_info) != STB_LOCAL)) { 1255aefb655Srie eprintf(ofl->ofl_lml, ERR_WARNING, MSG_INTL(MSG_FIL_NONAMESYM), 1264a8d0ea7SAli Bahrami ifl->ifl_name, EC_WORD(symsecndx), symsecname, symndx, 1274a8d0ea7SAli Bahrami EC_XWORD(name)); 1287c478bd9Sstevel@tonic-gate } 1297c478bd9Sstevel@tonic-gate return (strs + name); 1307c478bd9Sstevel@tonic-gate } 1317c478bd9Sstevel@tonic-gate 132ba2be530Sab /* 133ba2be530Sab * For producing symbol names strings to use in error messages. 134ba2be530Sab * If the symbol has a non-null name, then the string returned by 135ba2be530Sab * this function is the output from demangle(), surrounded by 136ba2be530Sab * single quotes. For null names, a descriptive string giving 137ba2be530Sab * the symbol section and index is generated. 138ba2be530Sab * 139ba2be530Sab * This function uses an internal static buffer to hold the resulting 140ba2be530Sab * string. The value returned is usable by the caller until the next 141ba2be530Sab * call, at which point it is overwritten. 142ba2be530Sab */ 143ba2be530Sab static const char * 144ba2be530Sab demangle_symname(const char *name, const char *symtab_name, Word symndx) 145ba2be530Sab { 146ba2be530Sab #define INIT_BUFSIZE 256 147ba2be530Sab 1486b3ba5bdSAli Bahrami static char *buf; 1496b3ba5bdSAli Bahrami static size_t bufsize = 0; 150ba2be530Sab size_t len; 151ba2be530Sab int use_name; 152ba2be530Sab 153ba2be530Sab use_name = (name != NULL) && (*name != '\0'); 154ba2be530Sab 155ba2be530Sab if (use_name) { 156ba2be530Sab name = demangle(name); 157ba2be530Sab len = strlen(name) + 2; /* Include room for quotes */ 158ba2be530Sab } else { 159ba2be530Sab name = MSG_ORIG(MSG_STR_EMPTY); 1604f680cc6SAli Bahrami len = strlen(symtab_name) + 2 + CONV_INV_BUFSIZE; 161ba2be530Sab } 162ba2be530Sab len++; /* Null termination */ 163ba2be530Sab 164ba2be530Sab /* If our buffer is too small, double it until it is big enough */ 165ba2be530Sab if (len > bufsize) { 166ba2be530Sab size_t new_bufsize = bufsize; 167ba2be530Sab char *new_buf; 168ba2be530Sab 169ba2be530Sab if (new_bufsize == 0) 170ba2be530Sab new_bufsize = INIT_BUFSIZE; 171ba2be530Sab while (len > new_bufsize) 172ba2be530Sab new_bufsize *= 2; 1736b3ba5bdSAli Bahrami if ((new_buf = libld_malloc(new_bufsize)) == NULL) 174ba2be530Sab return (name); 175ba2be530Sab buf = new_buf; 176ba2be530Sab bufsize = new_bufsize; 177ba2be530Sab } 178ba2be530Sab 179ba2be530Sab if (use_name) { 180ba2be530Sab (void) snprintf(buf, bufsize, MSG_ORIG(MSG_FMT_SYMNAM), name); 181ba2be530Sab } else { 182ba2be530Sab (void) snprintf(buf, bufsize, MSG_ORIG(MSG_FMT_NULLSYMNAM), 183ba2be530Sab symtab_name, EC_WORD(symndx)); 184ba2be530Sab } 185ba2be530Sab 186ba2be530Sab return (buf); 187ba2be530Sab 188ba2be530Sab #undef INIT_BUFSIZE 189ba2be530Sab } 190ba2be530Sab 1917c478bd9Sstevel@tonic-gate /* 1927c478bd9Sstevel@tonic-gate * Shared objects can be built that define specific symbols that can not be 1937c478bd9Sstevel@tonic-gate * directly bound to. These objects have a syminfo section (and an associated 1947c478bd9Sstevel@tonic-gate * DF_1_NODIRECT dynamic flags entry). Scan this table looking for symbols 1957c478bd9Sstevel@tonic-gate * that can't be bound to directly, and if this files symbol is presently 1967c478bd9Sstevel@tonic-gate * referenced, mark it so that we don't directly bind to it. 1977c478bd9Sstevel@tonic-gate */ 1987c478bd9Sstevel@tonic-gate uintptr_t 1999a411307Srie ld_sym_nodirect(Is_desc *isp, Ifl_desc *ifl, Ofl_desc *ofl) 2007c478bd9Sstevel@tonic-gate { 2017c478bd9Sstevel@tonic-gate Shdr *sifshdr, *symshdr; 2027c478bd9Sstevel@tonic-gate Syminfo *sifdata; 2037c478bd9Sstevel@tonic-gate Sym *symdata; 2047c478bd9Sstevel@tonic-gate char *strdata; 2057c478bd9Sstevel@tonic-gate ulong_t cnt, _cnt; 2067c478bd9Sstevel@tonic-gate 2077c478bd9Sstevel@tonic-gate /* 2087c478bd9Sstevel@tonic-gate * Get the syminfo data, and determine the number of entries. 2097c478bd9Sstevel@tonic-gate */ 2107c478bd9Sstevel@tonic-gate sifshdr = isp->is_shdr; 2117c478bd9Sstevel@tonic-gate sifdata = (Syminfo *)isp->is_indata->d_buf; 2127c478bd9Sstevel@tonic-gate cnt = sifshdr->sh_size / sifshdr->sh_entsize; 2137c478bd9Sstevel@tonic-gate 2147c478bd9Sstevel@tonic-gate /* 2157c478bd9Sstevel@tonic-gate * Get the associated symbol table. 2167c478bd9Sstevel@tonic-gate */ 21728bda19cSRod Evans if ((sifshdr->sh_link == 0) || (sifshdr->sh_link >= ifl->ifl_shnum)) { 21828bda19cSRod Evans /* 21928bda19cSRod Evans * Broken input file 22028bda19cSRod Evans */ 22128bda19cSRod Evans eprintf(ofl->ofl_lml, ERR_FATAL, MSG_INTL(MSG_FIL_INVSHINFO), 22228bda19cSRod Evans ifl->ifl_name, isp->is_name, EC_XWORD(sifshdr->sh_link)); 22328bda19cSRod Evans ofl->ofl_flags |= FLG_OF_FATAL; 22428bda19cSRod Evans return (0); 22528bda19cSRod Evans } 2267c478bd9Sstevel@tonic-gate symshdr = ifl->ifl_isdesc[sifshdr->sh_link]->is_shdr; 2277c478bd9Sstevel@tonic-gate symdata = ifl->ifl_isdesc[sifshdr->sh_link]->is_indata->d_buf; 2287c478bd9Sstevel@tonic-gate 2297c478bd9Sstevel@tonic-gate /* 2307c478bd9Sstevel@tonic-gate * Get the string table associated with the symbol table. 2317c478bd9Sstevel@tonic-gate */ 2327c478bd9Sstevel@tonic-gate strdata = ifl->ifl_isdesc[symshdr->sh_link]->is_indata->d_buf; 2337c478bd9Sstevel@tonic-gate 2347c478bd9Sstevel@tonic-gate /* 2357c478bd9Sstevel@tonic-gate * Traverse the syminfo data for symbols that can't be directly 2367c478bd9Sstevel@tonic-gate * bound to. 2377c478bd9Sstevel@tonic-gate */ 2387c478bd9Sstevel@tonic-gate for (_cnt = 1, sifdata++; _cnt < cnt; _cnt++, sifdata++) { 2397c478bd9Sstevel@tonic-gate Sym *sym; 2407c478bd9Sstevel@tonic-gate char *str; 2417c478bd9Sstevel@tonic-gate Sym_desc *sdp; 2427c478bd9Sstevel@tonic-gate 2433c4993fbSrie if ((sifdata->si_flags & SYMINFO_FLG_NOEXTDIRECT) == 0) 2447c478bd9Sstevel@tonic-gate continue; 2457c478bd9Sstevel@tonic-gate 2467c478bd9Sstevel@tonic-gate sym = (Sym *)(symdata + _cnt); 2477c478bd9Sstevel@tonic-gate str = (char *)(strdata + sym->st_name); 2487c478bd9Sstevel@tonic-gate 24928bda19cSRod Evans if ((sdp = ld_sym_find(str, SYM_NOHASH, NULL, ofl)) != NULL) { 2507c478bd9Sstevel@tonic-gate if (ifl != sdp->sd_file) 2517c478bd9Sstevel@tonic-gate continue; 2527c478bd9Sstevel@tonic-gate 253635216b6SRod Evans sdp->sd_flags &= ~FLG_SY_DIR; 254635216b6SRod Evans sdp->sd_flags |= FLG_SY_NDIR; 2557c478bd9Sstevel@tonic-gate } 2567c478bd9Sstevel@tonic-gate } 2577c478bd9Sstevel@tonic-gate return (0); 2587c478bd9Sstevel@tonic-gate } 2597c478bd9Sstevel@tonic-gate 2607c478bd9Sstevel@tonic-gate /* 2617c478bd9Sstevel@tonic-gate * If, during symbol processing, it is necessary to update a local symbols 2627c478bd9Sstevel@tonic-gate * contents before we have generated the symbol tables in the output image, 2637c478bd9Sstevel@tonic-gate * create a new symbol structure and copy the original symbol contents. While 2647c478bd9Sstevel@tonic-gate * we are processing the input files, their local symbols are part of the 2657c478bd9Sstevel@tonic-gate * read-only mapped image. Commonly, these symbols are copied to the new output 2667c478bd9Sstevel@tonic-gate * file image and then updated to reflect their new address and any change in 2677c478bd9Sstevel@tonic-gate * attributes. However, sometimes during relocation counting, it is necessary 2687c478bd9Sstevel@tonic-gate * to adjust the symbols information. This routine provides for the generation 2697c478bd9Sstevel@tonic-gate * of a new symbol image so that this update can be performed. 2707c478bd9Sstevel@tonic-gate * All global symbols are copied to an internal symbol table to improve locality 2717c478bd9Sstevel@tonic-gate * of reference and hence performance, and thus this copying is not necessary. 2727c478bd9Sstevel@tonic-gate */ 2737c478bd9Sstevel@tonic-gate uintptr_t 2745aefb655Srie ld_sym_copy(Sym_desc *sdp) 2757c478bd9Sstevel@tonic-gate { 2767c478bd9Sstevel@tonic-gate Sym *nsym; 2777c478bd9Sstevel@tonic-gate 2787c478bd9Sstevel@tonic-gate if (sdp->sd_flags & FLG_SY_CLEAN) { 2796b3ba5bdSAli Bahrami if ((nsym = libld_malloc(sizeof (Sym))) == NULL) 2807c478bd9Sstevel@tonic-gate return (S_ERROR); 2817c478bd9Sstevel@tonic-gate *nsym = *(sdp->sd_sym); 2827c478bd9Sstevel@tonic-gate sdp->sd_sym = nsym; 2837c478bd9Sstevel@tonic-gate sdp->sd_flags &= ~FLG_SY_CLEAN; 2847c478bd9Sstevel@tonic-gate } 2857c478bd9Sstevel@tonic-gate return (1); 2867c478bd9Sstevel@tonic-gate } 2877c478bd9Sstevel@tonic-gate 2887c478bd9Sstevel@tonic-gate /* 2897c478bd9Sstevel@tonic-gate * Finds a given name in the link editors internal symbol table. If no 2907c478bd9Sstevel@tonic-gate * hash value is specified it is calculated. A pointer to the located 2917c478bd9Sstevel@tonic-gate * Sym_desc entry is returned, or NULL if the symbol is not found. 2927c478bd9Sstevel@tonic-gate */ 2937c478bd9Sstevel@tonic-gate Sym_desc * 2945aefb655Srie ld_sym_find(const char *name, Word hash, avl_index_t *where, Ofl_desc *ofl) 2957c478bd9Sstevel@tonic-gate { 2966b3ba5bdSAli Bahrami Sym_avlnode qsav, *sav; 2977c478bd9Sstevel@tonic-gate 2987c478bd9Sstevel@tonic-gate if (hash == SYM_NOHASH) 2997c478bd9Sstevel@tonic-gate /* LINTED */ 3007c478bd9Sstevel@tonic-gate hash = (Word)elf_hash((const char *)name); 3017c478bd9Sstevel@tonic-gate qsav.sav_hash = hash; 3027c478bd9Sstevel@tonic-gate qsav.sav_name = name; 3037c478bd9Sstevel@tonic-gate 3047c478bd9Sstevel@tonic-gate /* 3057c478bd9Sstevel@tonic-gate * Perform search for symbol in AVL tree. Note that the 'where' field 3067c478bd9Sstevel@tonic-gate * is passed in from the caller. If a 'where' is present, it can be 307a194faf8Srie * used in subsequent 'ld_sym_enter()' calls if required. 3087c478bd9Sstevel@tonic-gate */ 3097c478bd9Sstevel@tonic-gate sav = avl_find(&ofl->ofl_symavl, &qsav, where); 3107c478bd9Sstevel@tonic-gate 3117c478bd9Sstevel@tonic-gate /* 3127c478bd9Sstevel@tonic-gate * If symbol was not found in the avl tree, return null to show that. 3137c478bd9Sstevel@tonic-gate */ 3146b3ba5bdSAli Bahrami if (sav == NULL) 3156b3ba5bdSAli Bahrami return (NULL); 3167c478bd9Sstevel@tonic-gate 3177c478bd9Sstevel@tonic-gate /* 3187c478bd9Sstevel@tonic-gate * Return symbol found. 3197c478bd9Sstevel@tonic-gate */ 320635216b6SRod Evans return (sav->sav_sdp); 3217c478bd9Sstevel@tonic-gate } 3227c478bd9Sstevel@tonic-gate 3237c478bd9Sstevel@tonic-gate /* 3247c478bd9Sstevel@tonic-gate * Enter a new symbol into the link editors internal symbol table. 3257c478bd9Sstevel@tonic-gate * If the symbol is from an input file, information regarding the input file 3267c478bd9Sstevel@tonic-gate * and input section is also recorded. Otherwise (file == NULL) the symbol 3277c478bd9Sstevel@tonic-gate * has been internally generated (ie. _etext, _edata, etc.). 3287c478bd9Sstevel@tonic-gate */ 3297c478bd9Sstevel@tonic-gate Sym_desc * 3305aefb655Srie ld_sym_enter(const char *name, Sym *osym, Word hash, Ifl_desc *ifl, 331635216b6SRod Evans Ofl_desc *ofl, Word ndx, Word shndx, sd_flag_t sdflags, avl_index_t *where) 3327c478bd9Sstevel@tonic-gate { 3337c478bd9Sstevel@tonic-gate Sym_desc *sdp; 3347c478bd9Sstevel@tonic-gate Sym_aux *sap; 3357c478bd9Sstevel@tonic-gate Sym_avlnode *savl; 3367c478bd9Sstevel@tonic-gate char *_name; 3377c478bd9Sstevel@tonic-gate Sym *nsym; 3387c478bd9Sstevel@tonic-gate Half etype; 33960758829Srie uchar_t vis; 3407c478bd9Sstevel@tonic-gate avl_index_t _where; 3417c478bd9Sstevel@tonic-gate 3427c478bd9Sstevel@tonic-gate /* 3437c478bd9Sstevel@tonic-gate * Establish the file type. 3447c478bd9Sstevel@tonic-gate */ 3457c478bd9Sstevel@tonic-gate if (ifl) 3467c478bd9Sstevel@tonic-gate etype = ifl->ifl_ehdr->e_type; 3477c478bd9Sstevel@tonic-gate else 3487c478bd9Sstevel@tonic-gate etype = ET_NONE; 3497c478bd9Sstevel@tonic-gate 3507c478bd9Sstevel@tonic-gate ofl->ofl_entercnt++; 3517c478bd9Sstevel@tonic-gate 3527c478bd9Sstevel@tonic-gate /* 3537c478bd9Sstevel@tonic-gate * Allocate a Sym Descriptor, Auxiliary Descriptor, and a Sym AVLNode - 3547c478bd9Sstevel@tonic-gate * contiguously. 3557c478bd9Sstevel@tonic-gate */ 356635216b6SRod Evans if ((savl = libld_calloc(S_DROUND(sizeof (Sym_avlnode)) + 357635216b6SRod Evans S_DROUND(sizeof (Sym_desc)) + 358635216b6SRod Evans S_DROUND(sizeof (Sym_aux)), 1)) == NULL) 3597c478bd9Sstevel@tonic-gate return ((Sym_desc *)S_ERROR); 360635216b6SRod Evans sdp = (Sym_desc *)((uintptr_t)savl + 361635216b6SRod Evans S_DROUND(sizeof (Sym_avlnode))); 362635216b6SRod Evans sap = (Sym_aux *)((uintptr_t)sdp + 363635216b6SRod Evans S_DROUND(sizeof (Sym_desc))); 3647c478bd9Sstevel@tonic-gate 365635216b6SRod Evans savl->sav_sdp = sdp; 3667c478bd9Sstevel@tonic-gate sdp->sd_file = ifl; 3677c478bd9Sstevel@tonic-gate sdp->sd_aux = sap; 3687c478bd9Sstevel@tonic-gate savl->sav_hash = sap->sa_hash = hash; 3697c478bd9Sstevel@tonic-gate 3707c478bd9Sstevel@tonic-gate /* 3717c478bd9Sstevel@tonic-gate * Copy the symbol table entry from the input file into the internal 3727c478bd9Sstevel@tonic-gate * entry and have the symbol descriptor use it. 3737c478bd9Sstevel@tonic-gate */ 3747c478bd9Sstevel@tonic-gate sdp->sd_sym = nsym = &sap->sa_sym; 3757c478bd9Sstevel@tonic-gate *nsym = *osym; 3767c478bd9Sstevel@tonic-gate sdp->sd_shndx = shndx; 3777c478bd9Sstevel@tonic-gate sdp->sd_flags |= sdflags; 3787c478bd9Sstevel@tonic-gate 3796b3ba5bdSAli Bahrami if ((_name = libld_malloc(strlen(name) + 1)) == NULL) 3807c478bd9Sstevel@tonic-gate return ((Sym_desc *)S_ERROR); 3817c478bd9Sstevel@tonic-gate savl->sav_name = sdp->sd_name = (const char *)strcpy(_name, name); 3827c478bd9Sstevel@tonic-gate 3837c478bd9Sstevel@tonic-gate /* 3847c478bd9Sstevel@tonic-gate * Enter Symbol in AVL tree. 3857c478bd9Sstevel@tonic-gate */ 3867c478bd9Sstevel@tonic-gate if (where == 0) { 3877c478bd9Sstevel@tonic-gate /* LINTED */ 3887c478bd9Sstevel@tonic-gate Sym_avlnode *_savl; 3897c478bd9Sstevel@tonic-gate /* 3905aefb655Srie * If a previous ld_sym_find() hasn't initialized 'where' do it 3917c478bd9Sstevel@tonic-gate * now. 3927c478bd9Sstevel@tonic-gate */ 3937c478bd9Sstevel@tonic-gate where = &_where; 3947c478bd9Sstevel@tonic-gate _savl = avl_find(&ofl->ofl_symavl, savl, where); 3956b3ba5bdSAli Bahrami assert(_savl == NULL); 3967c478bd9Sstevel@tonic-gate } 3977c478bd9Sstevel@tonic-gate avl_insert(&ofl->ofl_symavl, savl, *where); 3987c478bd9Sstevel@tonic-gate 3997c478bd9Sstevel@tonic-gate /* 4007c478bd9Sstevel@tonic-gate * Record the section index. This is possible because the 4017c478bd9Sstevel@tonic-gate * `ifl_isdesc' table is filled before we start symbol processing. 4027c478bd9Sstevel@tonic-gate */ 4030bc07c75Srie if ((sdflags & FLG_SY_SPECSEC) || (nsym->st_shndx == SHN_UNDEF)) 4047c478bd9Sstevel@tonic-gate sdp->sd_isc = NULL; 4057c478bd9Sstevel@tonic-gate else { 4067c478bd9Sstevel@tonic-gate sdp->sd_isc = ifl->ifl_isdesc[shndx]; 4077c478bd9Sstevel@tonic-gate 4087c478bd9Sstevel@tonic-gate /* 4097c478bd9Sstevel@tonic-gate * If this symbol is from a relocatable object, make sure that 4107c478bd9Sstevel@tonic-gate * it is still associated with a section. For example, an 4117c478bd9Sstevel@tonic-gate * unknown section type (SHT_NULL) would have been rejected on 4127c478bd9Sstevel@tonic-gate * input with a warning. Here, we make the use of the symbol 4137c478bd9Sstevel@tonic-gate * fatal. A symbol descriptor is still returned, so that the 4147c478bd9Sstevel@tonic-gate * caller can continue processing all symbols, and hence flush 4157c478bd9Sstevel@tonic-gate * out as many error conditions as possible. 4167c478bd9Sstevel@tonic-gate */ 4176b3ba5bdSAli Bahrami if ((etype == ET_REL) && (sdp->sd_isc == NULL)) { 4185aefb655Srie eprintf(ofl->ofl_lml, ERR_FATAL, 4195aefb655Srie MSG_INTL(MSG_SYM_INVSEC), name, ifl->ifl_name, 4205aefb655Srie EC_XWORD(shndx)); 4217c478bd9Sstevel@tonic-gate ofl->ofl_flags |= FLG_OF_FATAL; 4227c478bd9Sstevel@tonic-gate return (sdp); 4237c478bd9Sstevel@tonic-gate } 4247c478bd9Sstevel@tonic-gate } 4257c478bd9Sstevel@tonic-gate 4267c478bd9Sstevel@tonic-gate /* 4277c478bd9Sstevel@tonic-gate * Mark any COMMON symbols as 'tentative'. 4287c478bd9Sstevel@tonic-gate */ 42954d82594Sseizo if (sdflags & FLG_SY_SPECSEC) { 4300bc07c75Srie if (nsym->st_shndx == SHN_COMMON) 43154d82594Sseizo sdp->sd_flags |= FLG_SY_TENTSYM; 432ba2be530Sab #if defined(_ELF64) 433ba2be530Sab else if ((ld_targ.t_m.m_mach == EM_AMD64) && 434ba2be530Sab (nsym->st_shndx == SHN_X86_64_LCOMMON)) 43554d82594Sseizo sdp->sd_flags |= FLG_SY_TENTSYM; 43654d82594Sseizo #endif 43754d82594Sseizo } 4387c478bd9Sstevel@tonic-gate 4397c478bd9Sstevel@tonic-gate /* 44060758829Srie * Establish the symbols visibility and reference. 4417c478bd9Sstevel@tonic-gate */ 44260758829Srie vis = ELF_ST_VISIBILITY(nsym->st_other); 44360758829Srie 4447c478bd9Sstevel@tonic-gate if ((etype == ET_NONE) || (etype == ET_REL)) { 44560758829Srie switch (vis) { 44660758829Srie case STV_DEFAULT: 447635216b6SRod Evans sdp->sd_flags |= FLG_SY_DEFAULT; 44860758829Srie break; 44960758829Srie case STV_INTERNAL: 45060758829Srie case STV_HIDDEN: 451635216b6SRod Evans sdp->sd_flags |= FLG_SY_HIDDEN; 45260758829Srie break; 45360758829Srie case STV_PROTECTED: 454635216b6SRod Evans sdp->sd_flags |= FLG_SY_PROTECT; 45560758829Srie break; 45660758829Srie case STV_EXPORTED: 457635216b6SRod Evans sdp->sd_flags |= FLG_SY_EXPORT; 45860758829Srie break; 45960758829Srie case STV_SINGLETON: 460635216b6SRod Evans sdp->sd_flags |= (FLG_SY_SINGLE | FLG_SY_NDIR); 46128bda19cSRod Evans ofl->ofl_flags1 |= (FLG_OF1_NDIRECT | FLG_OF1_NGLBDIR); 46260758829Srie break; 46360758829Srie case STV_ELIMINATE: 464635216b6SRod Evans sdp->sd_flags |= (FLG_SY_HIDDEN | FLG_SY_ELIM); 46560758829Srie break; 46660758829Srie default: 46760758829Srie assert(vis <= STV_ELIMINATE); 46860758829Srie } 46960758829Srie 4707c478bd9Sstevel@tonic-gate sdp->sd_ref = REF_REL_NEED; 4717c478bd9Sstevel@tonic-gate 4727c478bd9Sstevel@tonic-gate /* 4739a411307Srie * Under -Bnodirect, all exported interfaces that have not 4749a411307Srie * explicitly been defined protected or directly bound to, are 4759a411307Srie * tagged to prevent direct binding. 4767c478bd9Sstevel@tonic-gate */ 4770bc07c75Srie if ((ofl->ofl_flags1 & FLG_OF1_ALNODIR) && 478635216b6SRod Evans ((sdp->sd_flags & (FLG_SY_PROTECT | FLG_SY_DIR)) == 0) && 4799a411307Srie (nsym->st_shndx != SHN_UNDEF)) { 480635216b6SRod Evans sdp->sd_flags |= FLG_SY_NDIR; 4819a411307Srie } 4827c478bd9Sstevel@tonic-gate } else { 4837c478bd9Sstevel@tonic-gate sdp->sd_ref = REF_DYN_SEEN; 4847c478bd9Sstevel@tonic-gate 4857c478bd9Sstevel@tonic-gate /* 48660758829Srie * If this is a protected symbol, remember this. Note, this 487635216b6SRod Evans * state is different from the FLG_SY_PROTECT used to establish 48860758829Srie * a symbol definitions visibility. This state is used to warn 48960758829Srie * against possible copy relocations against this referenced 49060758829Srie * symbol. 4917c478bd9Sstevel@tonic-gate */ 49260758829Srie if (vis == STV_PROTECTED) 4937c478bd9Sstevel@tonic-gate sdp->sd_flags |= FLG_SY_PROT; 4947c478bd9Sstevel@tonic-gate 4957c478bd9Sstevel@tonic-gate /* 49660758829Srie * If this is a SINGLETON definition, then indicate the symbol 49760758829Srie * can not be directly bound to, and retain the visibility. 49860758829Srie * This visibility will be inherited by any references made to 49960758829Srie * this symbol. 5007c478bd9Sstevel@tonic-gate */ 50160758829Srie if ((vis == STV_SINGLETON) && (nsym->st_shndx != SHN_UNDEF)) 502635216b6SRod Evans sdp->sd_flags |= (FLG_SY_SINGLE | FLG_SY_NDIR); 5037c478bd9Sstevel@tonic-gate 5047c478bd9Sstevel@tonic-gate /* 50560758829Srie * If the new symbol is from a shared library and is associated 50660758829Srie * with a SHT_NOBITS section then this symbol originated from a 50760758829Srie * tentative symbol. 5087c478bd9Sstevel@tonic-gate */ 5097c478bd9Sstevel@tonic-gate if (sdp->sd_isc && 5107c478bd9Sstevel@tonic-gate (sdp->sd_isc->is_shdr->sh_type == SHT_NOBITS)) 5117c478bd9Sstevel@tonic-gate sdp->sd_flags |= FLG_SY_TENTSYM; 5127c478bd9Sstevel@tonic-gate } 5137c478bd9Sstevel@tonic-gate 5147c478bd9Sstevel@tonic-gate /* 5157c478bd9Sstevel@tonic-gate * Reclassify any SHN_SUNW_IGNORE symbols to SHN_UNDEF so as to 5160bc07c75Srie * simplify future processing. 5177c478bd9Sstevel@tonic-gate */ 5180bc07c75Srie if (nsym->st_shndx == SHN_SUNW_IGNORE) { 5197c478bd9Sstevel@tonic-gate sdp->sd_shndx = shndx = SHN_UNDEF; 520635216b6SRod Evans sdp->sd_flags |= (FLG_SY_REDUCED | 521635216b6SRod Evans FLG_SY_HIDDEN | FLG_SY_IGNORE | FLG_SY_ELIM); 5227c478bd9Sstevel@tonic-gate } 5237c478bd9Sstevel@tonic-gate 5247c478bd9Sstevel@tonic-gate /* 5257c478bd9Sstevel@tonic-gate * If this is an undefined, or common symbol from a relocatable object 5267c478bd9Sstevel@tonic-gate * determine whether it is a global or weak reference (see build_osym(), 5277c478bd9Sstevel@tonic-gate * where REF_DYN_NEED definitions are returned back to undefines). 5287c478bd9Sstevel@tonic-gate */ 52954d82594Sseizo if ((etype == ET_REL) && 53054d82594Sseizo (ELF_ST_BIND(nsym->st_info) == STB_GLOBAL) && 5310bc07c75Srie ((nsym->st_shndx == SHN_UNDEF) || ((sdflags & FLG_SY_SPECSEC) && 532ba2be530Sab #if defined(_ELF64) 5330bc07c75Srie ((nsym->st_shndx == SHN_COMMON) || 534ba2be530Sab ((ld_targ.t_m.m_mach == EM_AMD64) && 535ba2be530Sab (nsym->st_shndx == SHN_X86_64_LCOMMON)))))) 53654d82594Sseizo #else 53733eb6ee1Sab /* BEGIN CSTYLED */ 5380bc07c75Srie (nsym->st_shndx == SHN_COMMON)))) 53933eb6ee1Sab /* END CSTYLED */ 54054d82594Sseizo #endif 5417c478bd9Sstevel@tonic-gate sdp->sd_flags |= FLG_SY_GLOBREF; 5427c478bd9Sstevel@tonic-gate 5437c478bd9Sstevel@tonic-gate /* 5447c478bd9Sstevel@tonic-gate * Record the input filename on the referenced or defined files list 5457c478bd9Sstevel@tonic-gate * for possible later diagnostics. The `sa_rfile' pointer contains the 5467c478bd9Sstevel@tonic-gate * name of the file that first referenced this symbol and is used to 5477c478bd9Sstevel@tonic-gate * generate undefined symbol diagnostics (refer to sym_undef_entry()). 5487c478bd9Sstevel@tonic-gate * Note that this entry can be overridden if a reference from a 5497c478bd9Sstevel@tonic-gate * relocatable object is found after a reference from a shared object 5507c478bd9Sstevel@tonic-gate * (refer to sym_override()). 5517c478bd9Sstevel@tonic-gate * The `sa_dfiles' list is used to maintain the list of files that 5527c478bd9Sstevel@tonic-gate * define the same symbol. This list can be used for two reasons: 5537c478bd9Sstevel@tonic-gate * 554*08278a5eSRod Evans * - To save the first definition of a symbol that is not available 5557c478bd9Sstevel@tonic-gate * for this link-edit. 5567c478bd9Sstevel@tonic-gate * 557*08278a5eSRod Evans * - To save all definitions of a symbol when the -m option is in 5587c478bd9Sstevel@tonic-gate * effect. This is optional as it is used to list multiple 5597c478bd9Sstevel@tonic-gate * (interposed) definitions of a symbol (refer to ldmap_out()), 5607c478bd9Sstevel@tonic-gate * and can be quite expensive. 5617c478bd9Sstevel@tonic-gate */ 5620bc07c75Srie if (nsym->st_shndx == SHN_UNDEF) { 5637c478bd9Sstevel@tonic-gate sap->sa_rfile = ifl->ifl_name; 5647c478bd9Sstevel@tonic-gate } else { 5657c478bd9Sstevel@tonic-gate if (sdp->sd_ref == REF_DYN_SEEN) { 5667c478bd9Sstevel@tonic-gate /* 5677c478bd9Sstevel@tonic-gate * A symbol is determined to be unavailable if it 5687c478bd9Sstevel@tonic-gate * belongs to a version of a shared object that this 5697c478bd9Sstevel@tonic-gate * user does not wish to use, or if it belongs to an 5707c478bd9Sstevel@tonic-gate * implicit shared object. 5717c478bd9Sstevel@tonic-gate */ 5727c478bd9Sstevel@tonic-gate if (ifl->ifl_vercnt) { 5739039eeafSab Ver_index *vip; 5747c478bd9Sstevel@tonic-gate Half vndx = ifl->ifl_versym[ndx]; 5757c478bd9Sstevel@tonic-gate 5767c478bd9Sstevel@tonic-gate sap->sa_dverndx = vndx; 5777c478bd9Sstevel@tonic-gate vip = &ifl->ifl_verndx[vndx]; 5787c478bd9Sstevel@tonic-gate if (!(vip->vi_flags & FLG_VER_AVAIL)) { 5797c478bd9Sstevel@tonic-gate sdp->sd_flags |= FLG_SY_NOTAVAIL; 5807c478bd9Sstevel@tonic-gate sap->sa_vfile = ifl->ifl_name; 5817c478bd9Sstevel@tonic-gate } 5827c478bd9Sstevel@tonic-gate } 5837c478bd9Sstevel@tonic-gate if (!(ifl->ifl_flags & FLG_IF_NEEDED)) 5847c478bd9Sstevel@tonic-gate sdp->sd_flags |= FLG_SY_NOTAVAIL; 5857c478bd9Sstevel@tonic-gate 5867c478bd9Sstevel@tonic-gate } else if (etype == ET_REL) { 5877c478bd9Sstevel@tonic-gate /* 5887c478bd9Sstevel@tonic-gate * If this symbol has been obtained from a versioned 5897c478bd9Sstevel@tonic-gate * input relocatable object then the new symbol must be 5907c478bd9Sstevel@tonic-gate * promoted to the versioning of the output file. 5917c478bd9Sstevel@tonic-gate */ 5927c478bd9Sstevel@tonic-gate if (ifl->ifl_versym) 5935aefb655Srie ld_vers_promote(sdp, ndx, ifl, ofl); 5947c478bd9Sstevel@tonic-gate } 5957c478bd9Sstevel@tonic-gate 5967c478bd9Sstevel@tonic-gate if ((ofl->ofl_flags & FLG_OF_GENMAP) && 5977c478bd9Sstevel@tonic-gate ((sdflags & FLG_SY_SPECSEC) == 0)) 59857ef7aa9SRod Evans if (aplist_append(&sap->sa_dfiles, ifl->ifl_name, 59957ef7aa9SRod Evans AL_CNT_SDP_DFILES) == NULL) 6007c478bd9Sstevel@tonic-gate return ((Sym_desc *)S_ERROR); 6017c478bd9Sstevel@tonic-gate } 6027c478bd9Sstevel@tonic-gate 60360758829Srie /* 60460758829Srie * Provided we're not processing a mapfile, diagnose the entered symbol. 60560758829Srie * Mapfile processing requires the symbol to be updated with additional 60660758829Srie * information, therefore the diagnosing of the symbol is deferred until 60760758829Srie * later (see Dbg_map_symbol()). 60860758829Srie */ 6096b3ba5bdSAli Bahrami if ((ifl == NULL) || ((ifl->ifl_flags & FLG_IF_MAPFILE) == 0)) 61060758829Srie DBG_CALL(Dbg_syms_entered(ofl, nsym, sdp)); 611635216b6SRod Evans 6127c478bd9Sstevel@tonic-gate return (sdp); 6137c478bd9Sstevel@tonic-gate } 6147c478bd9Sstevel@tonic-gate 6157c478bd9Sstevel@tonic-gate /* 6167c478bd9Sstevel@tonic-gate * Add a special symbol to the symbol table. Takes special symbol name with 6177c478bd9Sstevel@tonic-gate * and without underscores. This routine is called, after all other symbol 6187c478bd9Sstevel@tonic-gate * resolution has completed, to generate a reserved absolute symbol (the 6197c478bd9Sstevel@tonic-gate * underscore version). Special symbols are updated with the appropriate 620dd94ecefSrie * values in update_osym(). If the user has already defined this symbol 6217c478bd9Sstevel@tonic-gate * issue a warning and leave the symbol as is. If the non-underscore symbol 6227c478bd9Sstevel@tonic-gate * is referenced then turn it into a weak alias of the underscored symbol. 6237c478bd9Sstevel@tonic-gate * 624635216b6SRod Evans * The bits in sdflags_u are OR'd into the flags field of the symbol for the 625635216b6SRod Evans * underscored symbol. 626d579eb63Sab * 6277c478bd9Sstevel@tonic-gate * If this is a global symbol, and it hasn't explicitly been defined as being 6287c478bd9Sstevel@tonic-gate * directly bound to, indicate that it can't be directly bound to. 6297c478bd9Sstevel@tonic-gate * Historically, most special symbols only have meaning to the object in which 630c1c6f601Srie * they exist, however, they've always been global. To ensure compatibility 631c1c6f601Srie * with any unexpected use presently in effect, ensure these symbols don't get 6327c478bd9Sstevel@tonic-gate * directly bound to. Note, that establishing this state here isn't sufficient 6337c478bd9Sstevel@tonic-gate * to create a syminfo table, only if a syminfo table is being created by some 634c1c6f601Srie * other symbol directives will the nodirect binding be recorded. This ensures 6357c478bd9Sstevel@tonic-gate * we don't create syminfo sections for all objects we create, as this might add 6367c478bd9Sstevel@tonic-gate * unnecessary bloat to users who haven't explicitly requested extra symbol 6377c478bd9Sstevel@tonic-gate * information. 6387c478bd9Sstevel@tonic-gate */ 6397c478bd9Sstevel@tonic-gate static uintptr_t 6407c478bd9Sstevel@tonic-gate sym_add_spec(const char *name, const char *uname, Word sdaux_id, 641635216b6SRod Evans sd_flag_t sdflags_u, sd_flag_t sdflags, Ofl_desc *ofl) 6427c478bd9Sstevel@tonic-gate { 6437c478bd9Sstevel@tonic-gate Sym_desc *sdp; 6447c478bd9Sstevel@tonic-gate Sym_desc *usdp; 6457c478bd9Sstevel@tonic-gate Sym *sym; 6467c478bd9Sstevel@tonic-gate Word hash; 6477c478bd9Sstevel@tonic-gate avl_index_t where; 6487c478bd9Sstevel@tonic-gate 6497c478bd9Sstevel@tonic-gate /* LINTED */ 6507c478bd9Sstevel@tonic-gate hash = (Word)elf_hash(uname); 6515aefb655Srie if (usdp = ld_sym_find(uname, hash, &where, ofl)) { 6527c478bd9Sstevel@tonic-gate /* 6537c478bd9Sstevel@tonic-gate * If the underscore symbol exists and is undefined, or was 6547c478bd9Sstevel@tonic-gate * defined in a shared library, convert it to a local symbol. 6557c478bd9Sstevel@tonic-gate * Otherwise leave it as is and warn the user. 6567c478bd9Sstevel@tonic-gate */ 6577c478bd9Sstevel@tonic-gate if ((usdp->sd_shndx == SHN_UNDEF) || 6587c478bd9Sstevel@tonic-gate (usdp->sd_ref != REF_REL_NEED)) { 6597c478bd9Sstevel@tonic-gate usdp->sd_ref = REF_REL_NEED; 6607c478bd9Sstevel@tonic-gate usdp->sd_shndx = usdp->sd_sym->st_shndx = SHN_ABS; 661635216b6SRod Evans usdp->sd_flags |= FLG_SY_SPECSEC | sdflags_u; 6627c478bd9Sstevel@tonic-gate usdp->sd_sym->st_info = 6637c478bd9Sstevel@tonic-gate ELF_ST_INFO(STB_GLOBAL, STT_OBJECT); 6647c478bd9Sstevel@tonic-gate usdp->sd_isc = NULL; 6657c478bd9Sstevel@tonic-gate usdp->sd_sym->st_size = 0; 6667c478bd9Sstevel@tonic-gate usdp->sd_sym->st_value = 0; 6677c478bd9Sstevel@tonic-gate /* LINTED */ 6687c478bd9Sstevel@tonic-gate usdp->sd_aux->sa_symspec = (Half)sdaux_id; 6697c478bd9Sstevel@tonic-gate 6707c478bd9Sstevel@tonic-gate /* 6719a411307Srie * If a user hasn't specifically indicated that the 6729a411307Srie * scope of this symbol be made local, then leave it 6739a411307Srie * as global (ie. prevent automatic scoping). The GOT 6749a411307Srie * should be defined protected, whereas all other 6759a411307Srie * special symbols are tagged as no-direct. 6767c478bd9Sstevel@tonic-gate */ 677*08278a5eSRod Evans if (!SYM_IS_HIDDEN(usdp) && 678635216b6SRod Evans (sdflags & FLG_SY_DEFAULT)) { 67933eb6ee1Sab usdp->sd_aux->sa_overndx = VER_NDX_GLOBAL; 68033eb6ee1Sab if (sdaux_id == SDAUX_ID_GOT) { 681635216b6SRod Evans usdp->sd_flags &= ~FLG_SY_NDIR; 682635216b6SRod Evans usdp->sd_flags |= FLG_SY_PROTECT; 68333eb6ee1Sab usdp->sd_sym->st_other = STV_PROTECTED; 68433eb6ee1Sab } else if ( 685635216b6SRod Evans ((usdp->sd_flags & FLG_SY_DIR) == 0) && 68633eb6ee1Sab ((ofl->ofl_flags & FLG_OF_SYMBOLIC) == 0)) { 687635216b6SRod Evans usdp->sd_flags |= FLG_SY_NDIR; 68833eb6ee1Sab } 6897c478bd9Sstevel@tonic-gate } 690635216b6SRod Evans usdp->sd_flags |= sdflags; 6917c478bd9Sstevel@tonic-gate 6927c478bd9Sstevel@tonic-gate /* 693c1c6f601Srie * If the reference originated from a mapfile ensure 6947c478bd9Sstevel@tonic-gate * we mark the symbol as used. 6957c478bd9Sstevel@tonic-gate */ 6967c478bd9Sstevel@tonic-gate if (usdp->sd_flags & FLG_SY_MAPREF) 6977c478bd9Sstevel@tonic-gate usdp->sd_flags |= FLG_SY_MAPUSED; 6987c478bd9Sstevel@tonic-gate 6995aefb655Srie DBG_CALL(Dbg_syms_updated(ofl, usdp, uname)); 7007c478bd9Sstevel@tonic-gate } else 7015aefb655Srie eprintf(ofl->ofl_lml, ERR_WARNING, 7025aefb655Srie MSG_INTL(MSG_SYM_RESERVE), uname, 7037c478bd9Sstevel@tonic-gate usdp->sd_file->ifl_name); 7047c478bd9Sstevel@tonic-gate } else { 7057c478bd9Sstevel@tonic-gate /* 7067c478bd9Sstevel@tonic-gate * If the symbol does not exist create it. 7077c478bd9Sstevel@tonic-gate */ 7086b3ba5bdSAli Bahrami if ((sym = libld_calloc(sizeof (Sym), 1)) == NULL) 7097c478bd9Sstevel@tonic-gate return (S_ERROR); 7107c478bd9Sstevel@tonic-gate sym->st_shndx = SHN_ABS; 7117c478bd9Sstevel@tonic-gate sym->st_info = ELF_ST_INFO(STB_GLOBAL, STT_OBJECT); 7127c478bd9Sstevel@tonic-gate sym->st_size = 0; 7137c478bd9Sstevel@tonic-gate sym->st_value = 0; 7145aefb655Srie DBG_CALL(Dbg_syms_created(ofl->ofl_lml, uname)); 7155aefb655Srie if ((usdp = ld_sym_enter(uname, sym, hash, (Ifl_desc *)NULL, 716635216b6SRod Evans ofl, 0, SHN_ABS, (FLG_SY_SPECSEC | sdflags_u), &where)) == 7177c478bd9Sstevel@tonic-gate (Sym_desc *)S_ERROR) 7187c478bd9Sstevel@tonic-gate return (S_ERROR); 7197c478bd9Sstevel@tonic-gate usdp->sd_ref = REF_REL_NEED; 7207c478bd9Sstevel@tonic-gate /* LINTED */ 7217c478bd9Sstevel@tonic-gate usdp->sd_aux->sa_symspec = (Half)sdaux_id; 7227c478bd9Sstevel@tonic-gate 7237c478bd9Sstevel@tonic-gate usdp->sd_aux->sa_overndx = VER_NDX_GLOBAL; 7249a411307Srie 7259a411307Srie if (sdaux_id == SDAUX_ID_GOT) { 726635216b6SRod Evans usdp->sd_flags |= FLG_SY_PROTECT; 7279a411307Srie usdp->sd_sym->st_other = STV_PROTECTED; 728635216b6SRod Evans } else if ((sdflags & FLG_SY_DEFAULT) && 7299a411307Srie ((ofl->ofl_flags & FLG_OF_SYMBOLIC) == 0)) { 730635216b6SRod Evans usdp->sd_flags |= FLG_SY_NDIR; 7319a411307Srie } 732635216b6SRod Evans usdp->sd_flags |= sdflags; 7337c478bd9Sstevel@tonic-gate } 7347c478bd9Sstevel@tonic-gate 73528bda19cSRod Evans if (name && (sdp = ld_sym_find(name, SYM_NOHASH, NULL, ofl)) && 7360bc07c75Srie (sdp->sd_sym->st_shndx == SHN_UNDEF)) { 7377c478bd9Sstevel@tonic-gate uchar_t bind; 7387c478bd9Sstevel@tonic-gate 7397c478bd9Sstevel@tonic-gate /* 7407c478bd9Sstevel@tonic-gate * If the non-underscore symbol exists and is undefined 7417c478bd9Sstevel@tonic-gate * convert it to be a local. If the underscore has 7427c478bd9Sstevel@tonic-gate * sa_symspec set (ie. it was created above) then simulate this 7437c478bd9Sstevel@tonic-gate * as a weak alias. 7447c478bd9Sstevel@tonic-gate */ 7457c478bd9Sstevel@tonic-gate sdp->sd_ref = REF_REL_NEED; 7467c478bd9Sstevel@tonic-gate sdp->sd_shndx = sdp->sd_sym->st_shndx = SHN_ABS; 7477c478bd9Sstevel@tonic-gate sdp->sd_flags |= FLG_SY_SPECSEC; 7487c478bd9Sstevel@tonic-gate sdp->sd_isc = NULL; 7497c478bd9Sstevel@tonic-gate sdp->sd_sym->st_size = 0; 7507c478bd9Sstevel@tonic-gate sdp->sd_sym->st_value = 0; 7517c478bd9Sstevel@tonic-gate /* LINTED */ 7527c478bd9Sstevel@tonic-gate sdp->sd_aux->sa_symspec = (Half)sdaux_id; 7537c478bd9Sstevel@tonic-gate if (usdp->sd_aux->sa_symspec) { 7547c478bd9Sstevel@tonic-gate usdp->sd_aux->sa_linkndx = 0; 7557c478bd9Sstevel@tonic-gate sdp->sd_aux->sa_linkndx = 0; 7567c478bd9Sstevel@tonic-gate bind = STB_WEAK; 7577c478bd9Sstevel@tonic-gate } else 7587c478bd9Sstevel@tonic-gate bind = STB_GLOBAL; 7597c478bd9Sstevel@tonic-gate sdp->sd_sym->st_info = ELF_ST_INFO(bind, STT_OBJECT); 7607c478bd9Sstevel@tonic-gate 7617c478bd9Sstevel@tonic-gate /* 7629a411307Srie * If a user hasn't specifically indicated the scope of this 7639a411307Srie * symbol be made local then leave it as global (ie. prevent 7649a411307Srie * automatic scoping). The GOT should be defined protected, 7659a411307Srie * whereas all other special symbols are tagged as no-direct. 7667c478bd9Sstevel@tonic-gate */ 767*08278a5eSRod Evans if (!SYM_IS_HIDDEN(sdp) && 768635216b6SRod Evans (sdflags & FLG_SY_DEFAULT)) { 7697c478bd9Sstevel@tonic-gate sdp->sd_aux->sa_overndx = VER_NDX_GLOBAL; 7709a411307Srie if (sdaux_id == SDAUX_ID_GOT) { 771635216b6SRod Evans sdp->sd_flags &= ~FLG_SY_NDIR; 772635216b6SRod Evans sdp->sd_flags |= FLG_SY_PROTECT; 7739a411307Srie sdp->sd_sym->st_other = STV_PROTECTED; 774635216b6SRod Evans } else if (((sdp->sd_flags & FLG_SY_DIR) == 0) && 7759a411307Srie ((ofl->ofl_flags & FLG_OF_SYMBOLIC) == 0)) { 776635216b6SRod Evans sdp->sd_flags |= FLG_SY_NDIR; 7779a411307Srie } 7787c478bd9Sstevel@tonic-gate } 779635216b6SRod Evans sdp->sd_flags |= sdflags; 7807c478bd9Sstevel@tonic-gate 7817c478bd9Sstevel@tonic-gate /* 782c1c6f601Srie * If the reference originated from a mapfile ensure 7837c478bd9Sstevel@tonic-gate * we mark the symbol as used. 7847c478bd9Sstevel@tonic-gate */ 7857c478bd9Sstevel@tonic-gate if (sdp->sd_flags & FLG_SY_MAPREF) 7867c478bd9Sstevel@tonic-gate sdp->sd_flags |= FLG_SY_MAPUSED; 7877c478bd9Sstevel@tonic-gate 7885aefb655Srie DBG_CALL(Dbg_syms_updated(ofl, sdp, name)); 7897c478bd9Sstevel@tonic-gate } 7907c478bd9Sstevel@tonic-gate return (1); 7917c478bd9Sstevel@tonic-gate } 7927c478bd9Sstevel@tonic-gate 7937c478bd9Sstevel@tonic-gate 7947c478bd9Sstevel@tonic-gate /* 7957c478bd9Sstevel@tonic-gate * Print undefined symbols. 7967c478bd9Sstevel@tonic-gate */ 7977c478bd9Sstevel@tonic-gate static Boolean undef_title = TRUE; 7987c478bd9Sstevel@tonic-gate 7995aefb655Srie static void 8005aefb655Srie sym_undef_title(Ofl_desc *ofl) 8017c478bd9Sstevel@tonic-gate { 8025aefb655Srie eprintf(ofl->ofl_lml, ERR_NONE, MSG_INTL(MSG_SYM_FMT_UNDEF), 80333eb6ee1Sab MSG_INTL(MSG_SYM_UNDEF_ITM_11), 80433eb6ee1Sab MSG_INTL(MSG_SYM_UNDEF_ITM_21), 80533eb6ee1Sab MSG_INTL(MSG_SYM_UNDEF_ITM_12), 80633eb6ee1Sab MSG_INTL(MSG_SYM_UNDEF_ITM_22)); 8077c478bd9Sstevel@tonic-gate 8087c478bd9Sstevel@tonic-gate undef_title = FALSE; 8097c478bd9Sstevel@tonic-gate } 8107c478bd9Sstevel@tonic-gate 8117c478bd9Sstevel@tonic-gate /* 8127c478bd9Sstevel@tonic-gate * Undefined symbols can fall into one of four types: 8137c478bd9Sstevel@tonic-gate * 8146b3ba5bdSAli Bahrami * - the symbol is really undefined (SHN_UNDEF). 8157c478bd9Sstevel@tonic-gate * 8166b3ba5bdSAli Bahrami * - versioning has been enabled, however this symbol has not been assigned 8177c478bd9Sstevel@tonic-gate * to one of the defined versions. 8187c478bd9Sstevel@tonic-gate * 8196b3ba5bdSAli Bahrami * - the symbol has been defined by an implicitly supplied library, ie. one 8207c478bd9Sstevel@tonic-gate * which was encounted because it was NEEDED by another library, rather 8217c478bd9Sstevel@tonic-gate * than from a command line supplied library which would become the only 8227c478bd9Sstevel@tonic-gate * dependency of the output file being produced. 8237c478bd9Sstevel@tonic-gate * 8246b3ba5bdSAli Bahrami * - the symbol has been defined by a version of a shared object that is 8257c478bd9Sstevel@tonic-gate * not permitted for this link-edit. 8267c478bd9Sstevel@tonic-gate * 8277c478bd9Sstevel@tonic-gate * In all cases the file who made the first reference to this symbol will have 8287c478bd9Sstevel@tonic-gate * been recorded via the `sa_rfile' pointer. 8297c478bd9Sstevel@tonic-gate */ 8307c478bd9Sstevel@tonic-gate typedef enum { 8317c478bd9Sstevel@tonic-gate UNDEF, NOVERSION, IMPLICIT, NOTAVAIL, 8327c478bd9Sstevel@tonic-gate BNDLOCAL 8337c478bd9Sstevel@tonic-gate } Type; 8347c478bd9Sstevel@tonic-gate 8357c478bd9Sstevel@tonic-gate static const Msg format[] = { 8367c478bd9Sstevel@tonic-gate MSG_SYM_UND_UNDEF, /* MSG_INTL(MSG_SYM_UND_UNDEF) */ 8377c478bd9Sstevel@tonic-gate MSG_SYM_UND_NOVER, /* MSG_INTL(MSG_SYM_UND_NOVER) */ 8387c478bd9Sstevel@tonic-gate MSG_SYM_UND_IMPL, /* MSG_INTL(MSG_SYM_UND_IMPL) */ 8397c478bd9Sstevel@tonic-gate MSG_SYM_UND_NOTA, /* MSG_INTL(MSG_SYM_UND_NOTA) */ 8407c478bd9Sstevel@tonic-gate MSG_SYM_UND_BNDLOCAL /* MSG_INTL(MSG_SYM_UND_BNDLOCAL) */ 8417c478bd9Sstevel@tonic-gate }; 8427c478bd9Sstevel@tonic-gate 8435aefb655Srie static void 8445aefb655Srie sym_undef_entry(Ofl_desc *ofl, Sym_desc *sdp, Type type) 8457c478bd9Sstevel@tonic-gate { 8467c478bd9Sstevel@tonic-gate const char *name1, *name2, *name3; 8477c478bd9Sstevel@tonic-gate Ifl_desc *ifl = sdp->sd_file; 8487c478bd9Sstevel@tonic-gate Sym_aux *sap = sdp->sd_aux; 8497c478bd9Sstevel@tonic-gate 8507c478bd9Sstevel@tonic-gate if (undef_title) 8515aefb655Srie sym_undef_title(ofl); 8527c478bd9Sstevel@tonic-gate 8537c478bd9Sstevel@tonic-gate switch (type) { 8547c478bd9Sstevel@tonic-gate case UNDEF: 8557c478bd9Sstevel@tonic-gate case BNDLOCAL: 8567c478bd9Sstevel@tonic-gate name1 = sap->sa_rfile; 8577c478bd9Sstevel@tonic-gate break; 8587c478bd9Sstevel@tonic-gate case NOVERSION: 8597c478bd9Sstevel@tonic-gate name1 = ifl->ifl_name; 8607c478bd9Sstevel@tonic-gate break; 8617c478bd9Sstevel@tonic-gate case IMPLICIT: 8627c478bd9Sstevel@tonic-gate name1 = sap->sa_rfile; 8637c478bd9Sstevel@tonic-gate name2 = ifl->ifl_name; 8647c478bd9Sstevel@tonic-gate break; 8657c478bd9Sstevel@tonic-gate case NOTAVAIL: 8667c478bd9Sstevel@tonic-gate name1 = sap->sa_rfile; 8677c478bd9Sstevel@tonic-gate name2 = sap->sa_vfile; 8687c478bd9Sstevel@tonic-gate name3 = ifl->ifl_verndx[sap->sa_dverndx].vi_name; 8697c478bd9Sstevel@tonic-gate break; 8707c478bd9Sstevel@tonic-gate default: 8717c478bd9Sstevel@tonic-gate return; 8727c478bd9Sstevel@tonic-gate } 8737c478bd9Sstevel@tonic-gate 8745aefb655Srie eprintf(ofl->ofl_lml, ERR_NONE, MSG_INTL(format[type]), 8755aefb655Srie demangle(sdp->sd_name), name1, name2, name3); 8767c478bd9Sstevel@tonic-gate } 8777c478bd9Sstevel@tonic-gate 8787c478bd9Sstevel@tonic-gate /* 8797c478bd9Sstevel@tonic-gate * At this point all symbol input processing has been completed, therefore 8807c478bd9Sstevel@tonic-gate * complete the symbol table entries by generating any necessary internal 8817c478bd9Sstevel@tonic-gate * symbols. 8827c478bd9Sstevel@tonic-gate */ 8837c478bd9Sstevel@tonic-gate uintptr_t 8845aefb655Srie ld_sym_spec(Ofl_desc *ofl) 8857c478bd9Sstevel@tonic-gate { 8869a411307Srie Sym_desc *sdp; 8877c478bd9Sstevel@tonic-gate 8889a411307Srie if (ofl->ofl_flags & FLG_OF_RELOBJ) 8899a411307Srie return (1); 8907c478bd9Sstevel@tonic-gate 8919a411307Srie DBG_CALL(Dbg_syms_spec_title(ofl->ofl_lml)); 8929a411307Srie 8939a411307Srie if (sym_add_spec(MSG_ORIG(MSG_SYM_ETEXT), MSG_ORIG(MSG_SYM_ETEXT_U), 894635216b6SRod Evans SDAUX_ID_ETEXT, 0, (FLG_SY_DEFAULT | FLG_SY_EXPDEF), 89560758829Srie ofl) == S_ERROR) 8969a411307Srie return (S_ERROR); 8979a411307Srie if (sym_add_spec(MSG_ORIG(MSG_SYM_EDATA), MSG_ORIG(MSG_SYM_EDATA_U), 898635216b6SRod Evans SDAUX_ID_EDATA, 0, (FLG_SY_DEFAULT | FLG_SY_EXPDEF), 89960758829Srie ofl) == S_ERROR) 9009a411307Srie return (S_ERROR); 9019a411307Srie if (sym_add_spec(MSG_ORIG(MSG_SYM_END), MSG_ORIG(MSG_SYM_END_U), 902635216b6SRod Evans SDAUX_ID_END, FLG_SY_DYNSORT, (FLG_SY_DEFAULT | FLG_SY_EXPDEF), 90360758829Srie ofl) == S_ERROR) 9049a411307Srie return (S_ERROR); 9059a411307Srie if (sym_add_spec(MSG_ORIG(MSG_SYM_L_END), MSG_ORIG(MSG_SYM_L_END_U), 906635216b6SRod Evans SDAUX_ID_END, 0, FLG_SY_HIDDEN, ofl) == S_ERROR) 9079a411307Srie return (S_ERROR); 9089a411307Srie if (sym_add_spec(MSG_ORIG(MSG_SYM_L_START), MSG_ORIG(MSG_SYM_L_START_U), 909635216b6SRod Evans SDAUX_ID_START, 0, FLG_SY_HIDDEN, ofl) == S_ERROR) 9109a411307Srie return (S_ERROR); 9117c478bd9Sstevel@tonic-gate 9129a411307Srie /* 9139a411307Srie * Historically we've always produced a _DYNAMIC symbol, even for 9149a411307Srie * static executables (in which case its value will be 0). 9159a411307Srie */ 9169a411307Srie if (sym_add_spec(MSG_ORIG(MSG_SYM_DYNAMIC), MSG_ORIG(MSG_SYM_DYNAMIC_U), 917635216b6SRod Evans SDAUX_ID_DYN, FLG_SY_DYNSORT, (FLG_SY_DEFAULT | FLG_SY_EXPDEF), 91860758829Srie ofl) == S_ERROR) 9199a411307Srie return (S_ERROR); 9209a411307Srie 921d579eb63Sab if (OFL_ALLOW_DYNSYM(ofl)) 9229a411307Srie if (sym_add_spec(MSG_ORIG(MSG_SYM_PLKTBL), 9239a411307Srie MSG_ORIG(MSG_SYM_PLKTBL_U), SDAUX_ID_PLT, 924635216b6SRod Evans FLG_SY_DYNSORT, (FLG_SY_DEFAULT | FLG_SY_EXPDEF), 92560758829Srie ofl) == S_ERROR) 9267c478bd9Sstevel@tonic-gate return (S_ERROR); 9277c478bd9Sstevel@tonic-gate 9289a411307Srie /* 9299a411307Srie * A GOT reference will be accompanied by the associated GOT symbol. 9309a411307Srie * Make sure it gets assigned the appropriate special attributes. 9319a411307Srie */ 9329a411307Srie if (((sdp = ld_sym_find(MSG_ORIG(MSG_SYM_GOFTBL_U), 933635216b6SRod Evans SYM_NOHASH, NULL, ofl)) != NULL) && (sdp->sd_ref != REF_DYN_SEEN)) { 9349a411307Srie if (sym_add_spec(MSG_ORIG(MSG_SYM_GOFTBL), 935d579eb63Sab MSG_ORIG(MSG_SYM_GOFTBL_U), SDAUX_ID_GOT, FLG_SY_DYNSORT, 936635216b6SRod Evans (FLG_SY_DEFAULT | FLG_SY_EXPDEF), ofl) == S_ERROR) 9379a411307Srie return (S_ERROR); 9387c478bd9Sstevel@tonic-gate } 9399a411307Srie 9407c478bd9Sstevel@tonic-gate return (1); 9417c478bd9Sstevel@tonic-gate } 9427c478bd9Sstevel@tonic-gate 943*08278a5eSRod Evans /* 944*08278a5eSRod Evans * Determine a potential capability symbol's visibility. 945*08278a5eSRod Evans * 946*08278a5eSRod Evans * The -z symbolcap option transforms an object capabilities relocatable object 947*08278a5eSRod Evans * into a symbol capabilities relocatable object. Any global function symbols, 948*08278a5eSRod Evans * or initialized global data symbols are candidates for transforming into local 949*08278a5eSRod Evans * symbol capabilities definitions. However, if a user indicates that a symbol 950*08278a5eSRod Evans * should be demoted to local using a mapfile, then there is no need to 951*08278a5eSRod Evans * transform the associated global symbol. 952*08278a5eSRod Evans * 953*08278a5eSRod Evans * Normally, a symbol's visibility is determined after the symbol resolution 954*08278a5eSRod Evans * process, after all symbol state has been gathered and resolved. However, 955*08278a5eSRod Evans * for -z symbolcap, this determination is too late. When a global symbol is 956*08278a5eSRod Evans * read from an input file we need to determine it's visibility so as to decide 957*08278a5eSRod Evans * whether to create a local or not. 958*08278a5eSRod Evans * 959*08278a5eSRod Evans * If a user has explicitly defined this symbol as having local scope within a 960*08278a5eSRod Evans * mapfile, then a symbol of the same name already exists. However, explicit 961*08278a5eSRod Evans * local definitions are uncommon, as most mapfiles define the global symbol 962*08278a5eSRod Evans * requirements together with an auto-reduction directive '*'. If this state 963*08278a5eSRod Evans * has been defined, then we must make sure that the new symbol isn't a type 964*08278a5eSRod Evans * that can not be demoted to local. 965*08278a5eSRod Evans */ 966*08278a5eSRod Evans static int 967*08278a5eSRod Evans sym_cap_vis(const char *name, Word hash, Sym *sym, Ofl_desc *ofl) 968*08278a5eSRod Evans { 969*08278a5eSRod Evans Sym_desc *sdp; 970*08278a5eSRod Evans uchar_t vis; 971*08278a5eSRod Evans avl_index_t where; 972*08278a5eSRod Evans sd_flag_t sdflags = 0; 973*08278a5eSRod Evans 974*08278a5eSRod Evans /* 975*08278a5eSRod Evans * Determine the visibility of the new symbol. 976*08278a5eSRod Evans */ 977*08278a5eSRod Evans vis = ELF_ST_VISIBILITY(sym->st_other); 978*08278a5eSRod Evans switch (vis) { 979*08278a5eSRod Evans case STV_EXPORTED: 980*08278a5eSRod Evans sdflags |= FLG_SY_EXPORT; 981*08278a5eSRod Evans break; 982*08278a5eSRod Evans case STV_SINGLETON: 983*08278a5eSRod Evans sdflags |= FLG_SY_SINGLE; 984*08278a5eSRod Evans break; 985*08278a5eSRod Evans } 986*08278a5eSRod Evans 987*08278a5eSRod Evans /* 988*08278a5eSRod Evans * Determine whether a symbol definition already exists, and if so 989*08278a5eSRod Evans * obtain the visibility. 990*08278a5eSRod Evans */ 991*08278a5eSRod Evans if ((sdp = ld_sym_find(name, hash, &where, ofl)) != NULL) 992*08278a5eSRod Evans sdflags |= sdp->sd_flags; 993*08278a5eSRod Evans 994*08278a5eSRod Evans /* 995*08278a5eSRod Evans * Determine whether the symbol flags indicate this symbol should be 996*08278a5eSRod Evans * hidden. 997*08278a5eSRod Evans */ 998*08278a5eSRod Evans if ((ofl->ofl_flags & (FLG_OF_AUTOLCL | FLG_OF_AUTOELM)) && 999*08278a5eSRod Evans ((sdflags & MSK_SY_NOAUTO) == 0)) 1000*08278a5eSRod Evans sdflags |= FLG_SY_HIDDEN; 1001*08278a5eSRod Evans 1002*08278a5eSRod Evans return ((sdflags & FLG_SY_HIDDEN) == 0); 1003*08278a5eSRod Evans } 1004*08278a5eSRod Evans 10057c478bd9Sstevel@tonic-gate /* 10067c478bd9Sstevel@tonic-gate * This routine checks to see if a symbols visibility needs to be reduced to 10077c478bd9Sstevel@tonic-gate * either SYMBOLIC or LOCAL. This routine can be called from either 10087c478bd9Sstevel@tonic-gate * reloc_init() or sym_validate(). 10097c478bd9Sstevel@tonic-gate */ 10107c478bd9Sstevel@tonic-gate void 10115aefb655Srie ld_sym_adjust_vis(Sym_desc *sdp, Ofl_desc *ofl) 10127c478bd9Sstevel@tonic-gate { 101344bac77bSrie ofl_flag_t oflags = ofl->ofl_flags; 101444bac77bSrie Sym *sym = sdp->sd_sym; 10157c478bd9Sstevel@tonic-gate 10160bc07c75Srie if ((sdp->sd_ref == REF_REL_NEED) && 10170bc07c75Srie (sdp->sd_sym->st_shndx != SHN_UNDEF)) { 10187c478bd9Sstevel@tonic-gate /* 101960758829Srie * If auto-reduction/elimination is enabled, reduce any 1020*08278a5eSRod Evans * non-versioned, and non-local capabilities global symbols. 102160758829Srie * A symbol is a candidate for auto-reduction/elimination if: 102260758829Srie * 102328bda19cSRod Evans * - the symbol wasn't explicitly defined within a mapfile 102460758829Srie * (in which case all the necessary state has been applied 102560758829Srie * to the symbol), or 102628bda19cSRod Evans * - the symbol isn't one of the family of reserved 102760758829Srie * special symbols (ie. _end, _etext, etc.), or 102828bda19cSRod Evans * - the symbol isn't a SINGLETON, or 102928bda19cSRod Evans * - the symbol wasn't explicitly defined within a version 103060758829Srie * definition associated with an input relocatable object. 103160758829Srie * 10327c478bd9Sstevel@tonic-gate * Indicate that the symbol has been reduced as it may be 10337c478bd9Sstevel@tonic-gate * necessary to print these symbols later. 10347c478bd9Sstevel@tonic-gate */ 103544bac77bSrie if ((oflags & (FLG_OF_AUTOLCL | FLG_OF_AUTOELM)) && 1036635216b6SRod Evans ((sdp->sd_flags & MSK_SY_NOAUTO) == 0)) { 1037635216b6SRod Evans if ((sdp->sd_flags & FLG_SY_HIDDEN) == 0) { 1038635216b6SRod Evans sdp->sd_flags |= 1039635216b6SRod Evans (FLG_SY_REDUCED | FLG_SY_HIDDEN); 104060758829Srie } 10417c478bd9Sstevel@tonic-gate 104244bac77bSrie if (oflags & (FLG_OF_REDLSYM | FLG_OF_AUTOELM)) { 1043635216b6SRod Evans sdp->sd_flags |= FLG_SY_ELIM; 104460758829Srie sym->st_other = STV_ELIMINATE | 104560758829Srie (sym->st_other & ~MSK_SYM_VISIBILITY); 104660758829Srie } else if (ELF_ST_VISIBILITY(sym->st_other) != 104760758829Srie STV_INTERNAL) 104860758829Srie sym->st_other = STV_HIDDEN | 104960758829Srie (sym->st_other & ~MSK_SYM_VISIBILITY); 10507c478bd9Sstevel@tonic-gate } 10517c478bd9Sstevel@tonic-gate 10527c478bd9Sstevel@tonic-gate /* 10539a411307Srie * If -Bsymbolic is in effect, and the symbol hasn't explicitly 10549a411307Srie * been defined nodirect (via a mapfile), then bind the global 10559a411307Srie * symbol symbolically and assign the STV_PROTECTED visibility 10567c478bd9Sstevel@tonic-gate * attribute. 10577c478bd9Sstevel@tonic-gate */ 10587c478bd9Sstevel@tonic-gate if ((oflags & FLG_OF_SYMBOLIC) && 1059635216b6SRod Evans ((sdp->sd_flags & (FLG_SY_HIDDEN | FLG_SY_NDIR)) == 0)) { 1060635216b6SRod Evans sdp->sd_flags |= FLG_SY_PROTECT; 10617c478bd9Sstevel@tonic-gate if (ELF_ST_VISIBILITY(sym->st_other) == STV_DEFAULT) 10627c478bd9Sstevel@tonic-gate sym->st_other = STV_PROTECTED | 10637c478bd9Sstevel@tonic-gate (sym->st_other & ~MSK_SYM_VISIBILITY); 10647c478bd9Sstevel@tonic-gate } 10657c478bd9Sstevel@tonic-gate } 10667c478bd9Sstevel@tonic-gate 10677c478bd9Sstevel@tonic-gate /* 10687c478bd9Sstevel@tonic-gate * Indicate that this symbol has had it's visibility checked so that 10697c478bd9Sstevel@tonic-gate * we don't need to do this investigation again. 10707c478bd9Sstevel@tonic-gate */ 10717c478bd9Sstevel@tonic-gate sdp->sd_flags |= FLG_SY_VISIBLE; 10727c478bd9Sstevel@tonic-gate } 10737c478bd9Sstevel@tonic-gate 1074c1c6f601Srie /* 1075c1c6f601Srie * Make sure a symbol definition is local to the object being built. 1076c1c6f601Srie */ 107757ef7aa9SRod Evans inline static int 1078c1c6f601Srie ensure_sym_local(Ofl_desc *ofl, Sym_desc *sdp, const char *str) 1079c1c6f601Srie { 1080c1c6f601Srie if (sdp->sd_sym->st_shndx == SHN_UNDEF) { 1081c1c6f601Srie if (str) { 1082c1c6f601Srie eprintf(ofl->ofl_lml, ERR_FATAL, 1083c1c6f601Srie MSG_INTL(MSG_SYM_UNDEF), str, 1084c1c6f601Srie demangle((char *)sdp->sd_name)); 1085c1c6f601Srie } 1086c1c6f601Srie return (1); 1087c1c6f601Srie } 1088c1c6f601Srie if (sdp->sd_ref != REF_REL_NEED) { 1089c1c6f601Srie if (str) { 1090c1c6f601Srie eprintf(ofl->ofl_lml, ERR_FATAL, 1091c1c6f601Srie MSG_INTL(MSG_SYM_EXTERN), str, 1092c1c6f601Srie demangle((char *)sdp->sd_name), 1093c1c6f601Srie sdp->sd_file->ifl_name); 1094c1c6f601Srie } 1095c1c6f601Srie return (1); 1096c1c6f601Srie } 1097c1c6f601Srie 1098c1c6f601Srie sdp->sd_flags |= FLG_SY_UPREQD; 1099c1c6f601Srie if (sdp->sd_isc) { 1100c1c6f601Srie sdp->sd_isc->is_flags |= FLG_IS_SECTREF; 1101c1c6f601Srie sdp->sd_isc->is_file->ifl_flags |= FLG_IF_FILEREF; 1102c1c6f601Srie } 1103c1c6f601Srie return (0); 1104c1c6f601Srie } 1105c1c6f601Srie 1106c1c6f601Srie /* 1107c1c6f601Srie * Make sure all the symbol definitions required for initarray, finiarray, or 1108c1c6f601Srie * preinitarray's are local to the object being built. 1109c1c6f601Srie */ 1110c1c6f601Srie static int 111157ef7aa9SRod Evans ensure_array_local(Ofl_desc *ofl, APlist *apl, const char *str) 1112c1c6f601Srie { 111357ef7aa9SRod Evans Aliste idx; 1114c1c6f601Srie Sym_desc *sdp; 1115c1c6f601Srie int ret = 0; 1116c1c6f601Srie 111757ef7aa9SRod Evans for (APLIST_TRAVERSE(apl, idx, sdp)) 1118c1c6f601Srie ret += ensure_sym_local(ofl, sdp, str); 1119c1c6f601Srie 1120c1c6f601Srie return (ret); 1121c1c6f601Srie } 1122c1c6f601Srie 11237c478bd9Sstevel@tonic-gate /* 11247c478bd9Sstevel@tonic-gate * After all symbol table input processing has been finished, and all relocation 11257c478bd9Sstevel@tonic-gate * counting has been carried out (ie. no more symbols will be read, generated, 11267c478bd9Sstevel@tonic-gate * or modified), validate and count the relevant entries: 11277c478bd9Sstevel@tonic-gate * 1128*08278a5eSRod Evans * - check and print any undefined symbols remaining. Note that if a symbol 1129*08278a5eSRod Evans * has been defined by virtue of the inclusion of an implicit shared 1130*08278a5eSRod Evans * library, it is still classed as undefined. 11317c478bd9Sstevel@tonic-gate * 1132*08278a5eSRod Evans * - count the number of global needed symbols together with the size of 1133*08278a5eSRod Evans * their associated name strings (if scoping has been indicated these 1134*08278a5eSRod Evans * symbols may be reduced to locals). 11357c478bd9Sstevel@tonic-gate * 1136*08278a5eSRod Evans * - establish the size and alignment requirements for the global .bss 1137*08278a5eSRod Evans * section (the alignment of this section is based on the first symbol 1138*08278a5eSRod Evans * that it will contain). 11397c478bd9Sstevel@tonic-gate */ 11407c478bd9Sstevel@tonic-gate uintptr_t 11415aefb655Srie ld_sym_validate(Ofl_desc *ofl) 11427c478bd9Sstevel@tonic-gate { 11437c478bd9Sstevel@tonic-gate Sym_avlnode *sav; 11447c478bd9Sstevel@tonic-gate Sym_desc *sdp; 11457c478bd9Sstevel@tonic-gate Sym *sym; 11461d9df23bSab ofl_flag_t oflags = ofl->ofl_flags; 11471d9df23bSab ofl_flag_t undef = 0, needed = 0, verdesc = 0; 11487c478bd9Sstevel@tonic-gate Xword bssalign = 0, tlsalign = 0; 1149e64d0ff9SAli Bahrami Boolean need_bss, need_tlsbss; 11507c478bd9Sstevel@tonic-gate Xword bsssize = 0, tlssize = 0; 1151ba2be530Sab #if defined(_ELF64) 115254d82594Sseizo Xword lbssalign = 0, lbsssize = 0; 1153e64d0ff9SAli Bahrami Boolean need_lbss; 115454d82594Sseizo #endif 1155*08278a5eSRod Evans int ret, allow_ldynsym; 1156d579eb63Sab uchar_t type; 11577c478bd9Sstevel@tonic-gate 11582017c965SRod Evans DBG_CALL(Dbg_basic_validate(ofl->ofl_lml)); 11592017c965SRod Evans 1160e64d0ff9SAli Bahrami /* 1161e64d0ff9SAli Bahrami * The need_XXX booleans are used to determine whether we need to 1162e64d0ff9SAli Bahrami * create each type of bss section. We used to create these sections 1163e64d0ff9SAli Bahrami * if the sum of the required sizes for each type were non-zero. 1164e64d0ff9SAli Bahrami * However, it is possible for a compiler to generate COMMON variables 1165e64d0ff9SAli Bahrami * of zero-length and this tricks that logic --- even zero-length 1166e64d0ff9SAli Bahrami * symbols need an output section. 1167e64d0ff9SAli Bahrami */ 1168e64d0ff9SAli Bahrami need_bss = need_tlsbss = FALSE; 1169e64d0ff9SAli Bahrami #if defined(_ELF64) 1170e64d0ff9SAli Bahrami need_lbss = FALSE; 1171e64d0ff9SAli Bahrami #endif 1172e64d0ff9SAli Bahrami 11737c478bd9Sstevel@tonic-gate /* 11747c478bd9Sstevel@tonic-gate * If a symbol is undefined and this link-edit calls for no undefined 11757c478bd9Sstevel@tonic-gate * symbols to remain (this is the default case when generating an 11767c478bd9Sstevel@tonic-gate * executable but can be enforced for any object using -z defs), the 11777c478bd9Sstevel@tonic-gate * symbol is classified as undefined and a fatal error condition will 11787c478bd9Sstevel@tonic-gate * be indicated. 11797c478bd9Sstevel@tonic-gate * 11807c478bd9Sstevel@tonic-gate * If the symbol is undefined and we're creating a shared object with 11817c478bd9Sstevel@tonic-gate * the -Bsymbolic flag, then the symbol is also classified as undefined 11827c478bd9Sstevel@tonic-gate * and a warning condition will be indicated. 11837c478bd9Sstevel@tonic-gate */ 11847c478bd9Sstevel@tonic-gate if ((oflags & (FLG_OF_SHAROBJ | FLG_OF_SYMBOLIC)) == 11857c478bd9Sstevel@tonic-gate (FLG_OF_SHAROBJ | FLG_OF_SYMBOLIC)) 11867c478bd9Sstevel@tonic-gate undef = FLG_OF_WARN; 11877c478bd9Sstevel@tonic-gate if (oflags & FLG_OF_NOUNDEF) 11887c478bd9Sstevel@tonic-gate undef = FLG_OF_FATAL; 11897c478bd9Sstevel@tonic-gate 11907c478bd9Sstevel@tonic-gate /* 11917c478bd9Sstevel@tonic-gate * If the symbol is referenced from an implicitly included shared object 11927c478bd9Sstevel@tonic-gate * (ie. it's not on the NEEDED list) then the symbol is also classified 11937c478bd9Sstevel@tonic-gate * as undefined and a fatal error condition will be indicated. 11947c478bd9Sstevel@tonic-gate */ 11957c478bd9Sstevel@tonic-gate if ((oflags & FLG_OF_NOUNDEF) || !(oflags & FLG_OF_SHAROBJ)) 11967c478bd9Sstevel@tonic-gate needed = FLG_OF_FATAL; 11977c478bd9Sstevel@tonic-gate 11987c478bd9Sstevel@tonic-gate /* 119928bda19cSRod Evans * If the output image is being versioned, then all symbol definitions 120028bda19cSRod Evans * must be associated with a version. Any symbol that isn't associated 120128bda19cSRod Evans * with a version is classified as undefined, and a fatal error 120228bda19cSRod Evans * condition is indicated. 12037c478bd9Sstevel@tonic-gate */ 12047c478bd9Sstevel@tonic-gate if ((oflags & FLG_OF_VERDEF) && (ofl->ofl_vercnt > VER_NDX_GLOBAL)) 12057c478bd9Sstevel@tonic-gate verdesc = FLG_OF_FATAL; 12067c478bd9Sstevel@tonic-gate 12079039eeafSab allow_ldynsym = OFL_ALLOW_LDYNSYM(ofl); 1208d579eb63Sab 1209d579eb63Sab if (allow_ldynsym) { 1210d579eb63Sab /* 1211d579eb63Sab * Normally, we disallow symbols with 0 size from appearing 1212d579eb63Sab * in a dyn[sym|tls]sort section. However, there are some 1213d579eb63Sab * symbols that serve special purposes that we want to exempt 1214d579eb63Sab * from this rule. Look them up, and set their 1215d579eb63Sab * FLG_SY_DYNSORT flag. 1216d579eb63Sab */ 1217d579eb63Sab static const char *special[] = { 1218d579eb63Sab MSG_ORIG(MSG_SYM_INIT_U), /* _init */ 1219d579eb63Sab MSG_ORIG(MSG_SYM_FINI_U), /* _fini */ 1220d579eb63Sab MSG_ORIG(MSG_SYM_START), /* _start */ 1221d579eb63Sab NULL 1222d579eb63Sab }; 1223d579eb63Sab int i; 1224d579eb63Sab 1225d579eb63Sab for (i = 0; special[i] != NULL; i++) { 1226d579eb63Sab if (((sdp = ld_sym_find(special[i], 122728bda19cSRod Evans SYM_NOHASH, NULL, ofl)) != NULL) && 1228d579eb63Sab (sdp->sd_sym->st_size == 0)) { 1229d579eb63Sab if (ld_sym_copy(sdp) == S_ERROR) 1230d579eb63Sab return (S_ERROR); 1231d579eb63Sab sdp->sd_flags |= FLG_SY_DYNSORT; 1232d579eb63Sab } 1233d579eb63Sab } 1234d579eb63Sab } 1235d579eb63Sab 12367c478bd9Sstevel@tonic-gate /* 12377c478bd9Sstevel@tonic-gate * Collect and validate the globals from the internal symbol table. 12387c478bd9Sstevel@tonic-gate */ 12397c478bd9Sstevel@tonic-gate for (sav = avl_first(&ofl->ofl_symavl); sav; 12407c478bd9Sstevel@tonic-gate sav = AVL_NEXT(&ofl->ofl_symavl, sav)) { 124160758829Srie Is_desc *isp; 12420bc07c75Srie int undeferr = 0; 124360758829Srie uchar_t vis; 12447c478bd9Sstevel@tonic-gate 1245635216b6SRod Evans sdp = sav->sav_sdp; 12467c478bd9Sstevel@tonic-gate 12477c478bd9Sstevel@tonic-gate /* 12487c478bd9Sstevel@tonic-gate * If undefined symbols are allowed ignore any symbols that are 12497c478bd9Sstevel@tonic-gate * not needed. 12507c478bd9Sstevel@tonic-gate */ 12517c478bd9Sstevel@tonic-gate if (!(oflags & FLG_OF_NOUNDEF) && 12527c478bd9Sstevel@tonic-gate (sdp->sd_ref == REF_DYN_SEEN)) 12537c478bd9Sstevel@tonic-gate continue; 12547c478bd9Sstevel@tonic-gate 12557c478bd9Sstevel@tonic-gate /* 12567c478bd9Sstevel@tonic-gate * If the symbol originates from an external or parent mapfile 12577c478bd9Sstevel@tonic-gate * reference and hasn't been matched to a reference from a 12587c478bd9Sstevel@tonic-gate * relocatable object, ignore it. 12597c478bd9Sstevel@tonic-gate */ 12607c478bd9Sstevel@tonic-gate if ((sdp->sd_flags & (FLG_SY_EXTERN | FLG_SY_PARENT)) && 12617c478bd9Sstevel@tonic-gate ((sdp->sd_flags & FLG_SY_MAPUSED) == 0)) { 12627c478bd9Sstevel@tonic-gate sdp->sd_flags |= FLG_SY_INVALID; 12637c478bd9Sstevel@tonic-gate continue; 12647c478bd9Sstevel@tonic-gate } 12657c478bd9Sstevel@tonic-gate 12667c478bd9Sstevel@tonic-gate sym = sdp->sd_sym; 1267d579eb63Sab type = ELF_ST_TYPE(sym->st_info); 12687c478bd9Sstevel@tonic-gate 12697c478bd9Sstevel@tonic-gate /* 12707c478bd9Sstevel@tonic-gate * Sanity check TLS. 12717c478bd9Sstevel@tonic-gate */ 1272d579eb63Sab if ((type == STT_TLS) && (sym->st_size != 0) && 1273d579eb63Sab (sym->st_shndx != SHN_UNDEF) && 12740bc07c75Srie (sym->st_shndx != SHN_COMMON)) { 127560758829Srie Is_desc *isp = sdp->sd_isc; 127660758829Srie Ifl_desc *ifl = sdp->sd_file; 12777c478bd9Sstevel@tonic-gate 12786b3ba5bdSAli Bahrami if ((isp == NULL) || (isp->is_shdr == NULL) || 12797c478bd9Sstevel@tonic-gate ((isp->is_shdr->sh_flags & SHF_TLS) == 0)) { 12805aefb655Srie eprintf(ofl->ofl_lml, ERR_FATAL, 12815aefb655Srie MSG_INTL(MSG_SYM_TLS), 12827c478bd9Sstevel@tonic-gate demangle(sdp->sd_name), ifl->ifl_name); 12837c478bd9Sstevel@tonic-gate ofl->ofl_flags |= FLG_OF_FATAL; 12847c478bd9Sstevel@tonic-gate continue; 12857c478bd9Sstevel@tonic-gate } 12867c478bd9Sstevel@tonic-gate } 12877c478bd9Sstevel@tonic-gate 12887c478bd9Sstevel@tonic-gate if ((sdp->sd_flags & FLG_SY_VISIBLE) == 0) 12895aefb655Srie ld_sym_adjust_vis(sdp, ofl); 12907c478bd9Sstevel@tonic-gate 12917c478bd9Sstevel@tonic-gate if ((sdp->sd_flags & FLG_SY_REDUCED) && 12927c478bd9Sstevel@tonic-gate (oflags & FLG_OF_PROCRED)) { 12935aefb655Srie DBG_CALL(Dbg_syms_reduce(ofl, DBG_SYM_REDUCE_GLOBAL, 12945aefb655Srie sdp, 0, 0)); 12957c478bd9Sstevel@tonic-gate } 12967c478bd9Sstevel@tonic-gate 129760758829Srie /* 129860758829Srie * Record any STV_SINGLETON existence. 129960758829Srie */ 130060758829Srie if ((vis = ELF_ST_VISIBILITY(sym->st_other)) == STV_SINGLETON) 130160758829Srie ofl->ofl_dtflags_1 |= DF_1_SINGLETON; 130260758829Srie 13037c478bd9Sstevel@tonic-gate /* 13047c478bd9Sstevel@tonic-gate * If building a shared object or executable, and this is a 13057c478bd9Sstevel@tonic-gate * non-weak UNDEF symbol with reduced visibility (STV_*), then 13067c478bd9Sstevel@tonic-gate * give a fatal error. 13077c478bd9Sstevel@tonic-gate */ 130860758829Srie if (((oflags & FLG_OF_RELOBJ) == 0) && 13090bc07c75Srie (sym->st_shndx == SHN_UNDEF) && 13107c478bd9Sstevel@tonic-gate (ELF_ST_BIND(sym->st_info) != STB_WEAK)) { 131160758829Srie if (vis && (vis != STV_SINGLETON)) { 131260758829Srie sym_undef_entry(ofl, sdp, BNDLOCAL); 131360758829Srie ofl->ofl_flags |= FLG_OF_FATAL; 131460758829Srie continue; 131560758829Srie } 13167c478bd9Sstevel@tonic-gate } 13177c478bd9Sstevel@tonic-gate 13187c478bd9Sstevel@tonic-gate /* 13197c478bd9Sstevel@tonic-gate * If this symbol is defined in a non-allocatable section, 13207c478bd9Sstevel@tonic-gate * reduce it to local symbol. 13217c478bd9Sstevel@tonic-gate */ 13227c478bd9Sstevel@tonic-gate if (((isp = sdp->sd_isc) != 0) && isp->is_shdr && 13237c478bd9Sstevel@tonic-gate ((isp->is_shdr->sh_flags & SHF_ALLOC) == 0)) { 1324635216b6SRod Evans sdp->sd_flags |= (FLG_SY_REDUCED | FLG_SY_HIDDEN); 13257c478bd9Sstevel@tonic-gate } 13267c478bd9Sstevel@tonic-gate 13277c478bd9Sstevel@tonic-gate /* 13287c478bd9Sstevel@tonic-gate * If this symbol originated as a SHN_SUNW_IGNORE, it will have 13297c478bd9Sstevel@tonic-gate * been processed as an SHN_UNDEF. Return the symbol to its 13307c478bd9Sstevel@tonic-gate * original index for validation, and propagation to the output 13317c478bd9Sstevel@tonic-gate * file. 13327c478bd9Sstevel@tonic-gate */ 1333635216b6SRod Evans if (sdp->sd_flags & FLG_SY_IGNORE) 13340bc07c75Srie sdp->sd_shndx = SHN_SUNW_IGNORE; 13357c478bd9Sstevel@tonic-gate 13367c478bd9Sstevel@tonic-gate if (undef) { 13377c478bd9Sstevel@tonic-gate /* 13383b41b08bSab * If a non-weak reference remains undefined, or if a 13397c478bd9Sstevel@tonic-gate * mapfile reference is not bound to the relocatable 13407c478bd9Sstevel@tonic-gate * objects that make up the object being built, we have 13417c478bd9Sstevel@tonic-gate * a fatal error. 13427c478bd9Sstevel@tonic-gate * 13437c478bd9Sstevel@tonic-gate * The exceptions are symbols which are defined to be 13447c478bd9Sstevel@tonic-gate * found in the parent (FLG_SY_PARENT), which is really 13457c478bd9Sstevel@tonic-gate * only meaningful for direct binding, or are defined 13467c478bd9Sstevel@tonic-gate * external (FLG_SY_EXTERN) so as to suppress -zdefs 13477c478bd9Sstevel@tonic-gate * errors. 13487c478bd9Sstevel@tonic-gate * 13497c478bd9Sstevel@tonic-gate * Register symbols are always allowed to be UNDEF. 13507c478bd9Sstevel@tonic-gate * 13517c478bd9Sstevel@tonic-gate * Note that we don't include references created via -u 13527c478bd9Sstevel@tonic-gate * in the same shared object binding test. This is for 13537c478bd9Sstevel@tonic-gate * backward compatibility, in that a number of archive 13547c478bd9Sstevel@tonic-gate * makefile rules used -u to cause archive extraction. 13557c478bd9Sstevel@tonic-gate * These same rules have been cut and pasted to apply 13567c478bd9Sstevel@tonic-gate * to shared objects, and thus although the -u reference 13577c478bd9Sstevel@tonic-gate * is redundant, flagging it as fatal could cause some 13587c478bd9Sstevel@tonic-gate * build to fail. Also we have documented the use of 13597c478bd9Sstevel@tonic-gate * -u as a mechanism to cause binding to weak version 13607c478bd9Sstevel@tonic-gate * definitions, thus giving users an error condition 13617c478bd9Sstevel@tonic-gate * would be incorrect. 13627c478bd9Sstevel@tonic-gate */ 13637c478bd9Sstevel@tonic-gate if (!(sdp->sd_flags & FLG_SY_REGSYM) && 13640bc07c75Srie ((sym->st_shndx == SHN_UNDEF) && 13657c478bd9Sstevel@tonic-gate ((ELF_ST_BIND(sym->st_info) != STB_WEAK) && 13667c478bd9Sstevel@tonic-gate ((sdp->sd_flags & 13677c478bd9Sstevel@tonic-gate (FLG_SY_PARENT | FLG_SY_EXTERN)) == 0)) || 1368635216b6SRod Evans ((sdp->sd_flags & 1369635216b6SRod Evans (FLG_SY_MAPREF | FLG_SY_MAPUSED | FLG_SY_HIDDEN | 1370635216b6SRod Evans FLG_SY_PROTECT)) == FLG_SY_MAPREF))) { 13715aefb655Srie sym_undef_entry(ofl, sdp, UNDEF); 13727c478bd9Sstevel@tonic-gate ofl->ofl_flags |= undef; 13737c478bd9Sstevel@tonic-gate undeferr = 1; 13747c478bd9Sstevel@tonic-gate } 13757c478bd9Sstevel@tonic-gate 13767c478bd9Sstevel@tonic-gate } else { 13777c478bd9Sstevel@tonic-gate /* 13787c478bd9Sstevel@tonic-gate * For building things like shared objects (or anything 13797c478bd9Sstevel@tonic-gate * -znodefs), undefined symbols are allowed. 13807c478bd9Sstevel@tonic-gate * 13817c478bd9Sstevel@tonic-gate * If a mapfile reference remains undefined the user 13827c478bd9Sstevel@tonic-gate * would probably like a warning at least (they've 13837c478bd9Sstevel@tonic-gate * usually mis-spelt the reference). Refer to the above 13847c478bd9Sstevel@tonic-gate * comments for discussion on -u references, which 13857c478bd9Sstevel@tonic-gate * are not tested for in the same manner. 13867c478bd9Sstevel@tonic-gate */ 13877c478bd9Sstevel@tonic-gate if ((sdp->sd_flags & 13887c478bd9Sstevel@tonic-gate (FLG_SY_MAPREF | FLG_SY_MAPUSED)) == 13897c478bd9Sstevel@tonic-gate FLG_SY_MAPREF) { 13905aefb655Srie sym_undef_entry(ofl, sdp, UNDEF); 13917c478bd9Sstevel@tonic-gate ofl->ofl_flags |= FLG_OF_WARN; 13927c478bd9Sstevel@tonic-gate undeferr = 1; 13937c478bd9Sstevel@tonic-gate } 13947c478bd9Sstevel@tonic-gate } 13957c478bd9Sstevel@tonic-gate 13967c478bd9Sstevel@tonic-gate /* 13977c478bd9Sstevel@tonic-gate * If this symbol comes from a dependency mark the dependency 13987c478bd9Sstevel@tonic-gate * as required (-z ignore can result in unused dependencies 13997c478bd9Sstevel@tonic-gate * being dropped). If we need to record dependency versioning 14007c478bd9Sstevel@tonic-gate * information indicate what version of the needed shared object 14017c478bd9Sstevel@tonic-gate * this symbol is part of. Flag the symbol as undefined if it 14027c478bd9Sstevel@tonic-gate * has not been made available to us. 14037c478bd9Sstevel@tonic-gate */ 14047c478bd9Sstevel@tonic-gate if ((sdp->sd_ref == REF_DYN_NEED) && 14057c478bd9Sstevel@tonic-gate (!(sdp->sd_flags & FLG_SY_REFRSD))) { 14067c478bd9Sstevel@tonic-gate sdp->sd_file->ifl_flags |= FLG_IF_DEPREQD; 14077c478bd9Sstevel@tonic-gate 14087c478bd9Sstevel@tonic-gate /* 14097c478bd9Sstevel@tonic-gate * Capture that we've bound to a symbol that doesn't 14107c478bd9Sstevel@tonic-gate * allow being directly bound to. 14117c478bd9Sstevel@tonic-gate */ 1412635216b6SRod Evans if (sdp->sd_flags & FLG_SY_NDIR) 141328bda19cSRod Evans ofl->ofl_flags1 |= FLG_OF1_NGLBDIR; 14147c478bd9Sstevel@tonic-gate 14157c478bd9Sstevel@tonic-gate if (sdp->sd_file->ifl_vercnt) { 14167c478bd9Sstevel@tonic-gate int vndx; 141760758829Srie Ver_index *vip; 14187c478bd9Sstevel@tonic-gate 14197c478bd9Sstevel@tonic-gate vndx = sdp->sd_aux->sa_dverndx; 14207c478bd9Sstevel@tonic-gate vip = &sdp->sd_file->ifl_verndx[vndx]; 14217c478bd9Sstevel@tonic-gate if (vip->vi_flags & FLG_VER_AVAIL) { 14227c478bd9Sstevel@tonic-gate vip->vi_flags |= FLG_VER_REFER; 14237c478bd9Sstevel@tonic-gate } else { 14245aefb655Srie sym_undef_entry(ofl, sdp, NOTAVAIL); 14257c478bd9Sstevel@tonic-gate ofl->ofl_flags |= FLG_OF_FATAL; 14267c478bd9Sstevel@tonic-gate continue; 14277c478bd9Sstevel@tonic-gate } 14287c478bd9Sstevel@tonic-gate } 14297c478bd9Sstevel@tonic-gate } 14307c478bd9Sstevel@tonic-gate 14317c478bd9Sstevel@tonic-gate /* 14327c478bd9Sstevel@tonic-gate * Test that we do not bind to symbol supplied from an implicit 14337c478bd9Sstevel@tonic-gate * shared object. If a binding is from a weak reference it can 14347c478bd9Sstevel@tonic-gate * be ignored. 14357c478bd9Sstevel@tonic-gate */ 14367c478bd9Sstevel@tonic-gate if (needed && !undeferr && (sdp->sd_flags & FLG_SY_GLOBREF) && 14377c478bd9Sstevel@tonic-gate (sdp->sd_ref == REF_DYN_NEED) && 14387c478bd9Sstevel@tonic-gate (sdp->sd_flags & FLG_SY_NOTAVAIL)) { 14395aefb655Srie sym_undef_entry(ofl, sdp, IMPLICIT); 14407c478bd9Sstevel@tonic-gate ofl->ofl_flags |= needed; 14417c478bd9Sstevel@tonic-gate continue; 14427c478bd9Sstevel@tonic-gate } 14437c478bd9Sstevel@tonic-gate 14447c478bd9Sstevel@tonic-gate /* 14457c478bd9Sstevel@tonic-gate * Test that a symbol isn't going to be reduced to local scope 14467c478bd9Sstevel@tonic-gate * which actually wants to bind to a shared object - if so it's 14477c478bd9Sstevel@tonic-gate * a fatal error. 14487c478bd9Sstevel@tonic-gate */ 14497c478bd9Sstevel@tonic-gate if ((sdp->sd_ref == REF_DYN_NEED) && 1450635216b6SRod Evans (sdp->sd_flags & (FLG_SY_HIDDEN | FLG_SY_PROTECT))) { 14515aefb655Srie sym_undef_entry(ofl, sdp, BNDLOCAL); 14527c478bd9Sstevel@tonic-gate ofl->ofl_flags |= FLG_OF_FATAL; 14537c478bd9Sstevel@tonic-gate continue; 14547c478bd9Sstevel@tonic-gate } 14557c478bd9Sstevel@tonic-gate 14567c478bd9Sstevel@tonic-gate /* 14577c478bd9Sstevel@tonic-gate * If the output image is to be versioned then all symbol 145828bda19cSRod Evans * definitions must be associated with a version. Remove any 145928bda19cSRod Evans * versioning that might be left associated with an undefined 146028bda19cSRod Evans * symbol. 14617c478bd9Sstevel@tonic-gate */ 146228bda19cSRod Evans if (verdesc && (sdp->sd_ref == REF_REL_NEED)) { 146328bda19cSRod Evans if (sym->st_shndx == SHN_UNDEF) { 146428bda19cSRod Evans if (sdp->sd_aux && sdp->sd_aux->sa_overndx) 146528bda19cSRod Evans sdp->sd_aux->sa_overndx = 0; 146628bda19cSRod Evans } else { 1467*08278a5eSRod Evans if (!SYM_IS_HIDDEN(sdp) && sdp->sd_aux && 146828bda19cSRod Evans (sdp->sd_aux->sa_overndx == 0)) { 146928bda19cSRod Evans sym_undef_entry(ofl, sdp, NOVERSION); 147028bda19cSRod Evans ofl->ofl_flags |= verdesc; 147128bda19cSRod Evans continue; 147228bda19cSRod Evans } 147328bda19cSRod Evans } 14747c478bd9Sstevel@tonic-gate } 14757c478bd9Sstevel@tonic-gate 14767c478bd9Sstevel@tonic-gate /* 14777c478bd9Sstevel@tonic-gate * If we don't need the symbol there's no need to process it 14787c478bd9Sstevel@tonic-gate * any further. 14797c478bd9Sstevel@tonic-gate */ 14807c478bd9Sstevel@tonic-gate if (sdp->sd_ref == REF_DYN_SEEN) 14817c478bd9Sstevel@tonic-gate continue; 14827c478bd9Sstevel@tonic-gate 14837c478bd9Sstevel@tonic-gate /* 14847c478bd9Sstevel@tonic-gate * Calculate the size and alignment requirements for the global 14857c478bd9Sstevel@tonic-gate * .bss and .tls sections. If we're building a relocatable 14867c478bd9Sstevel@tonic-gate * object only account for scoped COMMON symbols (these will 14877c478bd9Sstevel@tonic-gate * be converted to .bss references). 14887c478bd9Sstevel@tonic-gate * 148935450702SAli Bahrami * When -z nopartial is in effect, partially initialized 149035450702SAli Bahrami * symbols are directed to the special .data section 149135450702SAli Bahrami * created for that purpose (ofl->ofl_isparexpn). 149235450702SAli Bahrami * Otherwise, partially initialized symbols go to .bss. 14937c478bd9Sstevel@tonic-gate * 14947c478bd9Sstevel@tonic-gate * Also refer to make_mvsections() in sunwmove.c 14957c478bd9Sstevel@tonic-gate */ 14960bc07c75Srie if ((sym->st_shndx == SHN_COMMON) && 14970bc07c75Srie (((oflags & FLG_OF_RELOBJ) == 0) || 1498*08278a5eSRod Evans (SYM_IS_HIDDEN(sdp) && (oflags & FLG_OF_PROCRED)))) { 149957ef7aa9SRod Evans if ((sdp->sd_move == NULL) || 150035450702SAli Bahrami ((sdp->sd_flags & FLG_SY_PAREXPN) == 0)) { 1501d579eb63Sab if (type != STT_TLS) { 1502e64d0ff9SAli Bahrami need_bss = TRUE; 1503e64d0ff9SAli Bahrami bsssize = (Xword)S_ROUND(bsssize, 1504e64d0ff9SAli Bahrami sym->st_value) + sym->st_size; 1505e64d0ff9SAli Bahrami if (sym->st_value > bssalign) 1506e64d0ff9SAli Bahrami bssalign = sym->st_value; 15077c478bd9Sstevel@tonic-gate } else { 1508e64d0ff9SAli Bahrami need_tlsbss = TRUE; 1509e64d0ff9SAli Bahrami tlssize = (Xword)S_ROUND(tlssize, 1510e64d0ff9SAli Bahrami sym->st_value) + sym->st_size; 1511e64d0ff9SAli Bahrami if (sym->st_value > tlsalign) 1512e64d0ff9SAli Bahrami tlsalign = sym->st_value; 15137c478bd9Sstevel@tonic-gate } 15147c478bd9Sstevel@tonic-gate } 15157c478bd9Sstevel@tonic-gate } 15167c478bd9Sstevel@tonic-gate 1517ba2be530Sab #if defined(_ELF64) 151854d82594Sseizo /* 151954d82594Sseizo * Calculate the size and alignment requirement for the global 152054d82594Sseizo * .lbss. TLS or partially initialized symbols do not need to be 152154d82594Sseizo * considered yet. 152254d82594Sseizo */ 1523ba2be530Sab if ((ld_targ.t_m.m_mach == EM_AMD64) && 1524ba2be530Sab (sym->st_shndx == SHN_X86_64_LCOMMON)) { 1525e64d0ff9SAli Bahrami need_lbss = TRUE; 152654d82594Sseizo lbsssize = (Xword)S_ROUND(lbsssize, sym->st_value) + 152733eb6ee1Sab sym->st_size; 152854d82594Sseizo if (sym->st_value > lbssalign) 152954d82594Sseizo lbssalign = sym->st_value; 153054d82594Sseizo } 153154d82594Sseizo #endif 15327c478bd9Sstevel@tonic-gate /* 15337c478bd9Sstevel@tonic-gate * If a symbol was referenced via the command line 15347c478bd9Sstevel@tonic-gate * (ld -u <>, ...), then this counts as a reference against the 15357c478bd9Sstevel@tonic-gate * symbol. Mark any section that symbol is defined in. 15367c478bd9Sstevel@tonic-gate */ 15377c478bd9Sstevel@tonic-gate if (((isp = sdp->sd_isc) != 0) && 15387c478bd9Sstevel@tonic-gate (sdp->sd_flags & FLG_SY_CMDREF)) { 15397c478bd9Sstevel@tonic-gate isp->is_flags |= FLG_IS_SECTREF; 15407c478bd9Sstevel@tonic-gate isp->is_file->ifl_flags |= FLG_IF_FILEREF; 15417c478bd9Sstevel@tonic-gate } 15427c478bd9Sstevel@tonic-gate 15437c478bd9Sstevel@tonic-gate /* 15447c478bd9Sstevel@tonic-gate * Update the symbol count and the associated name string size. 1545*08278a5eSRod Evans * Note, a capabilities symbol must remain as visible as a 1546*08278a5eSRod Evans * global symbol. However, the runtime linker recognizes the 1547*08278a5eSRod Evans * hidden requirement and ensures the symbol isn't made globally 1548*08278a5eSRod Evans * available at runtime. 15497c478bd9Sstevel@tonic-gate */ 1550*08278a5eSRod Evans if (SYM_IS_HIDDEN(sdp) && (oflags & FLG_OF_PROCRED)) { 15517c478bd9Sstevel@tonic-gate /* 155260758829Srie * If any reductions are being processed, keep a count 155360758829Srie * of eliminated symbols, and if the symbol is being 155460758829Srie * reduced to local, count it's size for the .symtab. 15557c478bd9Sstevel@tonic-gate */ 1556635216b6SRod Evans if (sdp->sd_flags & FLG_SY_ELIM) { 15577c478bd9Sstevel@tonic-gate ofl->ofl_elimcnt++; 15587c478bd9Sstevel@tonic-gate } else { 15597c478bd9Sstevel@tonic-gate ofl->ofl_scopecnt++; 15607c478bd9Sstevel@tonic-gate if ((((sdp->sd_flags & FLG_SY_REGSYM) == 0) || 15617c478bd9Sstevel@tonic-gate sym->st_name) && (st_insert(ofl->ofl_strtab, 15627c478bd9Sstevel@tonic-gate sdp->sd_name) == -1)) 15637c478bd9Sstevel@tonic-gate return (S_ERROR); 15649039eeafSab if (allow_ldynsym && sym->st_name && 1565d579eb63Sab ldynsym_symtype[type]) { 15669039eeafSab ofl->ofl_dynscopecnt++; 15679039eeafSab if (st_insert(ofl->ofl_dynstrtab, 15689039eeafSab sdp->sd_name) == -1) 15699039eeafSab return (S_ERROR); 1570d579eb63Sab /* Include it in sort section? */ 1571d579eb63Sab DYNSORT_COUNT(sdp, sym, type, ++); 15729039eeafSab } 15737c478bd9Sstevel@tonic-gate } 15747c478bd9Sstevel@tonic-gate } else { 15757c478bd9Sstevel@tonic-gate ofl->ofl_globcnt++; 15767c478bd9Sstevel@tonic-gate 1577d579eb63Sab /* 1578635216b6SRod Evans * Check to see if this global variable should go into 1579635216b6SRod Evans * a sort section. Sort sections require a 1580635216b6SRod Evans * .SUNW_ldynsym section, so, don't check unless a 1581635216b6SRod Evans * .SUNW_ldynsym is allowed. 1582d579eb63Sab */ 1583635216b6SRod Evans if (allow_ldynsym) 1584d579eb63Sab DYNSORT_COUNT(sdp, sym, type, ++); 1585d579eb63Sab 15867c478bd9Sstevel@tonic-gate /* 15877c478bd9Sstevel@tonic-gate * If global direct bindings are in effect, or this 15887c478bd9Sstevel@tonic-gate * symbol has bound to a dependency which was specified 15897c478bd9Sstevel@tonic-gate * as requiring direct bindings, and it hasn't 15907c478bd9Sstevel@tonic-gate * explicitly been defined as a non-direct binding 15917c478bd9Sstevel@tonic-gate * symbol, mark it. 15927c478bd9Sstevel@tonic-gate */ 15937c478bd9Sstevel@tonic-gate if (((ofl->ofl_dtflags_1 & DF_1_DIRECT) || (isp && 15947c478bd9Sstevel@tonic-gate (isp->is_file->ifl_flags & FLG_IF_DIRECT))) && 1595635216b6SRod Evans ((sdp->sd_flags & FLG_SY_NDIR) == 0)) 1596635216b6SRod Evans sdp->sd_flags |= FLG_SY_DIR; 15977c478bd9Sstevel@tonic-gate 15987c478bd9Sstevel@tonic-gate /* 15997c478bd9Sstevel@tonic-gate * Insert the symbol name. 16007c478bd9Sstevel@tonic-gate */ 16017c478bd9Sstevel@tonic-gate if (((sdp->sd_flags & FLG_SY_REGSYM) == 0) || 16027c478bd9Sstevel@tonic-gate sym->st_name) { 16037c478bd9Sstevel@tonic-gate if (st_insert(ofl->ofl_strtab, 16047c478bd9Sstevel@tonic-gate sdp->sd_name) == -1) 16057c478bd9Sstevel@tonic-gate return (S_ERROR); 16067c478bd9Sstevel@tonic-gate 16077c478bd9Sstevel@tonic-gate if (!(ofl->ofl_flags & FLG_OF_RELOBJ) && 16087c478bd9Sstevel@tonic-gate (st_insert(ofl->ofl_dynstrtab, 16097c478bd9Sstevel@tonic-gate sdp->sd_name) == -1)) 16107c478bd9Sstevel@tonic-gate return (S_ERROR); 16117c478bd9Sstevel@tonic-gate } 16127c478bd9Sstevel@tonic-gate 16137c478bd9Sstevel@tonic-gate /* 16147c478bd9Sstevel@tonic-gate * If this section offers a global symbol - record that 16157c478bd9Sstevel@tonic-gate * fact. 16167c478bd9Sstevel@tonic-gate */ 16177c478bd9Sstevel@tonic-gate if (isp) { 16187c478bd9Sstevel@tonic-gate isp->is_flags |= FLG_IS_SECTREF; 16197c478bd9Sstevel@tonic-gate isp->is_file->ifl_flags |= FLG_IF_FILEREF; 16207c478bd9Sstevel@tonic-gate } 16217c478bd9Sstevel@tonic-gate } 16227c478bd9Sstevel@tonic-gate } 16237c478bd9Sstevel@tonic-gate 16247c478bd9Sstevel@tonic-gate /* 16257c478bd9Sstevel@tonic-gate * If we've encountered a fatal error during symbol validation then 16267c478bd9Sstevel@tonic-gate * return now. 16277c478bd9Sstevel@tonic-gate */ 16287c478bd9Sstevel@tonic-gate if (ofl->ofl_flags & FLG_OF_FATAL) 16297c478bd9Sstevel@tonic-gate return (1); 16307c478bd9Sstevel@tonic-gate 16317c478bd9Sstevel@tonic-gate /* 16327c478bd9Sstevel@tonic-gate * Now that symbol resolution is completed, scan any register symbols. 16337c478bd9Sstevel@tonic-gate * From now on, we're only interested in those that contribute to the 16347c478bd9Sstevel@tonic-gate * output file. 16357c478bd9Sstevel@tonic-gate */ 16367c478bd9Sstevel@tonic-gate if (ofl->ofl_regsyms) { 16377c478bd9Sstevel@tonic-gate int ndx; 16387c478bd9Sstevel@tonic-gate 16397c478bd9Sstevel@tonic-gate for (ndx = 0; ndx < ofl->ofl_regsymsno; ndx++) { 16406b3ba5bdSAli Bahrami if ((sdp = ofl->ofl_regsyms[ndx]) == NULL) 16417c478bd9Sstevel@tonic-gate continue; 16427c478bd9Sstevel@tonic-gate if (sdp->sd_ref != REF_REL_NEED) { 16436b3ba5bdSAli Bahrami ofl->ofl_regsyms[ndx] = NULL; 16447c478bd9Sstevel@tonic-gate continue; 16457c478bd9Sstevel@tonic-gate } 16467c478bd9Sstevel@tonic-gate 16477c478bd9Sstevel@tonic-gate ofl->ofl_regsymcnt++; 16487c478bd9Sstevel@tonic-gate if (sdp->sd_sym->st_name == 0) 16497c478bd9Sstevel@tonic-gate sdp->sd_name = MSG_ORIG(MSG_STR_EMPTY); 16507c478bd9Sstevel@tonic-gate 1651*08278a5eSRod Evans if (SYM_IS_HIDDEN(sdp) || 16527c478bd9Sstevel@tonic-gate (ELF_ST_BIND(sdp->sd_sym->st_info) == STB_LOCAL)) 16537c478bd9Sstevel@tonic-gate ofl->ofl_lregsymcnt++; 16547c478bd9Sstevel@tonic-gate } 16557c478bd9Sstevel@tonic-gate } 16567c478bd9Sstevel@tonic-gate 16577c478bd9Sstevel@tonic-gate /* 16587c478bd9Sstevel@tonic-gate * Generate the .bss section now that we know its size and alignment. 16597c478bd9Sstevel@tonic-gate */ 1660e64d0ff9SAli Bahrami if (need_bss) { 166157ef7aa9SRod Evans if (ld_make_bss(ofl, bsssize, bssalign, 166257ef7aa9SRod Evans ld_targ.t_id.id_bss) == S_ERROR) 16637c478bd9Sstevel@tonic-gate return (S_ERROR); 16647c478bd9Sstevel@tonic-gate } 1665e64d0ff9SAli Bahrami if (need_tlsbss) { 166657ef7aa9SRod Evans if (ld_make_bss(ofl, tlssize, tlsalign, 166757ef7aa9SRod Evans ld_targ.t_id.id_tlsbss) == S_ERROR) 166854d82594Sseizo return (S_ERROR); 166954d82594Sseizo } 1670ba2be530Sab #if defined(_ELF64) 1671ba2be530Sab if ((ld_targ.t_m.m_mach == EM_AMD64) && 1672e64d0ff9SAli Bahrami need_lbss && !(oflags & FLG_OF_RELOBJ)) { 167357ef7aa9SRod Evans if (ld_make_bss(ofl, lbsssize, lbssalign, 167457ef7aa9SRod Evans ld_targ.t_id.id_lbss) == S_ERROR) 16757c478bd9Sstevel@tonic-gate return (S_ERROR); 16767c478bd9Sstevel@tonic-gate } 167754d82594Sseizo #endif 16787c478bd9Sstevel@tonic-gate /* 16797c478bd9Sstevel@tonic-gate * Determine what entry point symbol we need, and if found save its 16807c478bd9Sstevel@tonic-gate * symbol descriptor so that we can update the ELF header entry with the 16817c478bd9Sstevel@tonic-gate * symbols value later (see update_oehdr). Make sure the symbol is 1682c1c6f601Srie * tagged to ensure its update in case -s is in effect. Use any -e 16837c478bd9Sstevel@tonic-gate * option first, or the default entry points `_start' and `main'. 16847c478bd9Sstevel@tonic-gate */ 1685c1c6f601Srie ret = 0; 16867c478bd9Sstevel@tonic-gate if (ofl->ofl_entry) { 168728bda19cSRod Evans if ((sdp = ld_sym_find(ofl->ofl_entry, SYM_NOHASH, 168828bda19cSRod Evans NULL, ofl)) == NULL) { 16891d1fba8aSrie eprintf(ofl->ofl_lml, ERR_FATAL, 16901d1fba8aSrie MSG_INTL(MSG_ARG_NOENTRY), ofl->ofl_entry); 16911d1fba8aSrie ret++; 16921d1fba8aSrie } else if (ensure_sym_local(ofl, sdp, 16931d1fba8aSrie MSG_INTL(MSG_SYM_ENTRY)) != 0) { 1694c1c6f601Srie ret++; 16951d1fba8aSrie } else { 16961d1fba8aSrie ofl->ofl_entry = (void *)sdp; 16977c478bd9Sstevel@tonic-gate } 16985aefb655Srie } else if (((sdp = ld_sym_find(MSG_ORIG(MSG_SYM_START), 169928bda19cSRod Evans SYM_NOHASH, NULL, ofl)) != NULL) && (ensure_sym_local(ofl, 1700c1c6f601Srie sdp, 0) == 0)) { 17017c478bd9Sstevel@tonic-gate ofl->ofl_entry = (void *)sdp; 1702c1c6f601Srie 17035aefb655Srie } else if (((sdp = ld_sym_find(MSG_ORIG(MSG_SYM_MAIN), 170428bda19cSRod Evans SYM_NOHASH, NULL, ofl)) != NULL) && (ensure_sym_local(ofl, 1705c1c6f601Srie sdp, 0) == 0)) { 17067c478bd9Sstevel@tonic-gate ofl->ofl_entry = (void *)sdp; 17077c478bd9Sstevel@tonic-gate } 17087c478bd9Sstevel@tonic-gate 17097c478bd9Sstevel@tonic-gate /* 1710c1c6f601Srie * If ld -zdtrace=<sym> was given, then validate that the symbol is 1711c1c6f601Srie * defined within the current object being built. 17127c478bd9Sstevel@tonic-gate */ 17131d1fba8aSrie if ((sdp = ofl->ofl_dtracesym) != 0) 1714c1c6f601Srie ret += ensure_sym_local(ofl, sdp, MSG_ORIG(MSG_STR_DTRACE)); 17157c478bd9Sstevel@tonic-gate 1716c1c6f601Srie /* 1717c1c6f601Srie * If any initarray, finiarray or preinitarray functions have been 1718c1c6f601Srie * requested, make sure they are defined within the current object 1719c1c6f601Srie * being built. 1720c1c6f601Srie */ 172157ef7aa9SRod Evans if (ofl->ofl_initarray) { 172257ef7aa9SRod Evans ret += ensure_array_local(ofl, ofl->ofl_initarray, 1723c1c6f601Srie MSG_ORIG(MSG_SYM_INITARRAY)); 1724c1c6f601Srie } 172557ef7aa9SRod Evans if (ofl->ofl_finiarray) { 172657ef7aa9SRod Evans ret += ensure_array_local(ofl, ofl->ofl_finiarray, 1727c1c6f601Srie MSG_ORIG(MSG_SYM_FINIARRAY)); 1728c1c6f601Srie } 172957ef7aa9SRod Evans if (ofl->ofl_preiarray) { 173057ef7aa9SRod Evans ret += ensure_array_local(ofl, ofl->ofl_preiarray, 1731c1c6f601Srie MSG_ORIG(MSG_SYM_PREINITARRAY)); 1732c1c6f601Srie } 1733c1c6f601Srie 1734c1c6f601Srie if (ret) 1735c1c6f601Srie return (S_ERROR); 1736c1c6f601Srie 17377c478bd9Sstevel@tonic-gate /* 17387c478bd9Sstevel@tonic-gate * If we're required to record any needed dependencies versioning 17397c478bd9Sstevel@tonic-gate * information calculate it now that all symbols have been validated. 17407c478bd9Sstevel@tonic-gate */ 17417c478bd9Sstevel@tonic-gate if ((oflags & (FLG_OF_VERNEED | FLG_OF_NOVERSEC)) == FLG_OF_VERNEED) 17425aefb655Srie return (ld_vers_check_need(ofl)); 17437c478bd9Sstevel@tonic-gate else 17447c478bd9Sstevel@tonic-gate return (1); 17457c478bd9Sstevel@tonic-gate } 17467c478bd9Sstevel@tonic-gate 17477c478bd9Sstevel@tonic-gate /* 17487c478bd9Sstevel@tonic-gate * qsort(3c) comparison function. As an optimization for associating weak 17497c478bd9Sstevel@tonic-gate * symbols to their strong counterparts sort global symbols according to their 17506b3ba5bdSAli Bahrami * section index, address and binding. 17517c478bd9Sstevel@tonic-gate */ 17527c478bd9Sstevel@tonic-gate static int 17536b3ba5bdSAli Bahrami compare(const void *sdpp1, const void *sdpp2) 17547c478bd9Sstevel@tonic-gate { 17556b3ba5bdSAli Bahrami Sym_desc *sdp1 = *((Sym_desc **)sdpp1); 17566b3ba5bdSAli Bahrami Sym_desc *sdp2 = *((Sym_desc **)sdpp2); 17576b3ba5bdSAli Bahrami Sym *sym1, *sym2; 17587c478bd9Sstevel@tonic-gate uchar_t bind1, bind2; 17597c478bd9Sstevel@tonic-gate 17607c478bd9Sstevel@tonic-gate /* 17617c478bd9Sstevel@tonic-gate * Symbol descriptors may be zero, move these to the front of the 17627c478bd9Sstevel@tonic-gate * sorted array. 17637c478bd9Sstevel@tonic-gate */ 17646b3ba5bdSAli Bahrami if (sdp1 == NULL) 17657c478bd9Sstevel@tonic-gate return (-1); 17666b3ba5bdSAli Bahrami if (sdp2 == NULL) 17677c478bd9Sstevel@tonic-gate return (1); 17687c478bd9Sstevel@tonic-gate 17697c478bd9Sstevel@tonic-gate sym1 = sdp1->sd_sym; 17707c478bd9Sstevel@tonic-gate sym2 = sdp2->sd_sym; 17717c478bd9Sstevel@tonic-gate 17726b3ba5bdSAli Bahrami /* 17736b3ba5bdSAli Bahrami * Compare the symbols section index. This is important when sorting 17746b3ba5bdSAli Bahrami * the symbol tables of relocatable objects. In this case, a symbols 17756b3ba5bdSAli Bahrami * value is the offset within the associated section, and thus many 17766b3ba5bdSAli Bahrami * symbols can have the same value, but are effectively different 17776b3ba5bdSAli Bahrami * addresses. 17786b3ba5bdSAli Bahrami */ 17796b3ba5bdSAli Bahrami if (sym1->st_shndx > sym2->st_shndx) 17806b3ba5bdSAli Bahrami return (1); 17816b3ba5bdSAli Bahrami if (sym1->st_shndx < sym2->st_shndx) 17826b3ba5bdSAli Bahrami return (-1); 17836b3ba5bdSAli Bahrami 17847c478bd9Sstevel@tonic-gate /* 17857c478bd9Sstevel@tonic-gate * Compare the symbols value (address). 17867c478bd9Sstevel@tonic-gate */ 17877c478bd9Sstevel@tonic-gate if (sym1->st_value > sym2->st_value) 17887c478bd9Sstevel@tonic-gate return (1); 17897c478bd9Sstevel@tonic-gate if (sym1->st_value < sym2->st_value) 17907c478bd9Sstevel@tonic-gate return (-1); 17917c478bd9Sstevel@tonic-gate 17927c478bd9Sstevel@tonic-gate bind1 = ELF_ST_BIND(sym1->st_info); 17937c478bd9Sstevel@tonic-gate bind2 = ELF_ST_BIND(sym2->st_info); 17947c478bd9Sstevel@tonic-gate 17957c478bd9Sstevel@tonic-gate /* 17967c478bd9Sstevel@tonic-gate * If two symbols have the same address place the weak symbol before 17977c478bd9Sstevel@tonic-gate * any strong counterpart. 17987c478bd9Sstevel@tonic-gate */ 17997c478bd9Sstevel@tonic-gate if (bind1 > bind2) 18007c478bd9Sstevel@tonic-gate return (-1); 18017c478bd9Sstevel@tonic-gate if (bind1 < bind2) 18027c478bd9Sstevel@tonic-gate return (1); 18037c478bd9Sstevel@tonic-gate 18047c478bd9Sstevel@tonic-gate return (0); 18057c478bd9Sstevel@tonic-gate } 18067c478bd9Sstevel@tonic-gate 180769a0bf0cSab /* 180869a0bf0cSab * Issue a MSG_SYM_BADADDR error from ld_sym_process(). This error 180969a0bf0cSab * is issued when a symbol address/size is not contained by the 181069a0bf0cSab * target section. 181169a0bf0cSab * 181269a0bf0cSab * Such objects are at least partially corrupt, and the user would 181369a0bf0cSab * be well advised to be skeptical of them, and to ask their compiler 181469a0bf0cSab * supplier to fix the problem. However, a distinction needs to be 181569a0bf0cSab * made between symbols that reference readonly text, and those that 181669a0bf0cSab * access writable data. Other than throwing off profiling results, 181769a0bf0cSab * the readonly section case is less serious. We have encountered 181869a0bf0cSab * such objects in the field. In order to allow existing objects 181969a0bf0cSab * to continue working, we issue a warning rather than a fatal error 182069a0bf0cSab * if the symbol is against readonly text. Other cases are fatal. 182169a0bf0cSab */ 182269a0bf0cSab static void 182369a0bf0cSab issue_badaddr_msg(Ifl_desc *ifl, Ofl_desc *ofl, Sym_desc *sdp, 182469a0bf0cSab Sym *sym, Word shndx) 182569a0bf0cSab { 18261d9df23bSab ofl_flag_t flag; 18271d9df23bSab Error err; 18281d9df23bSab const char *msg; 182969a0bf0cSab 183069a0bf0cSab if ((sdp->sd_isc->is_shdr->sh_flags & (SHF_WRITE | SHF_ALLOC)) == 183169a0bf0cSab SHF_ALLOC) { 183269a0bf0cSab msg = MSG_INTL(MSG_SYM_BADADDR_ROTXT); 183369a0bf0cSab flag = FLG_OF_WARN; 183469a0bf0cSab err = ERR_WARNING; 183569a0bf0cSab } else { 183669a0bf0cSab msg = MSG_INTL(MSG_SYM_BADADDR); 183769a0bf0cSab flag = FLG_OF_FATAL; 183869a0bf0cSab err = ERR_FATAL; 183969a0bf0cSab } 184069a0bf0cSab 184169a0bf0cSab eprintf(ofl->ofl_lml, err, msg, demangle(sdp->sd_name), 184269a0bf0cSab ifl->ifl_name, shndx, sdp->sd_isc->is_name, 184369a0bf0cSab EC_XWORD(sdp->sd_isc->is_shdr->sh_size), 184469a0bf0cSab EC_XWORD(sym->st_value), EC_XWORD(sym->st_size)); 184569a0bf0cSab ofl->ofl_flags |= flag; 184669a0bf0cSab } 184769a0bf0cSab 1848*08278a5eSRod Evans /* 1849*08278a5eSRod Evans * Global symbols that are candidates for translation to local capability 1850*08278a5eSRod Evans * symbols under -z symbolcap, are maintained on a local symbol list. Once 1851*08278a5eSRod Evans * all symbols of a file are processed, this list is traversed to cull any 1852*08278a5eSRod Evans * unnecessary weak symbol aliases. 1853*08278a5eSRod Evans */ 1854*08278a5eSRod Evans typedef struct { 1855*08278a5eSRod Evans Sym_desc *c_nsdp; /* new lead symbol */ 1856*08278a5eSRod Evans Sym_desc *c_osdp; /* original symbol */ 1857*08278a5eSRod Evans Cap_group *c_group; /* symbol capability group */ 1858*08278a5eSRod Evans Word c_ndx; /* symbol index */ 1859*08278a5eSRod Evans } Cap_pair; 186069a0bf0cSab 18617c478bd9Sstevel@tonic-gate /* 18627c478bd9Sstevel@tonic-gate * Process the symbol table for the specified input file. At this point all 18637c478bd9Sstevel@tonic-gate * input sections from this input file have been assigned an input section 18647c478bd9Sstevel@tonic-gate * descriptor which is saved in the `ifl_isdesc' array. 18657c478bd9Sstevel@tonic-gate * 1866*08278a5eSRod Evans * - local symbols are saved (as is) if the input file is a relocatable 1867*08278a5eSRod Evans * object 18687c478bd9Sstevel@tonic-gate * 1869*08278a5eSRod Evans * - global symbols are added to the linkers internal symbol table if they 1870*08278a5eSRod Evans * are not already present, otherwise a symbol resolution function is 1871*08278a5eSRod Evans * called upon to resolve the conflict. 18727c478bd9Sstevel@tonic-gate */ 18737c478bd9Sstevel@tonic-gate uintptr_t 18745aefb655Srie ld_sym_process(Is_desc *isc, Ifl_desc *ifl, Ofl_desc *ofl) 18757c478bd9Sstevel@tonic-gate { 187675e45495Sab /* 187775e45495Sab * This macro tests the given symbol to see if it is out of 187875e45495Sab * range relative to the section it references. 187975e45495Sab * 188075e45495Sab * entry: 188175e45495Sab * - ifl is a relative object (ET_REL) 188275e45495Sab * _sdp - Symbol descriptor 188375e45495Sab * _sym - Symbol 188475e45495Sab * _type - Symbol type 188575e45495Sab * 188675e45495Sab * The following are tested: 188775e45495Sab * - Symbol length is non-zero 188875e45495Sab * - Symbol type is a type that references code or data 188975e45495Sab * - Referenced section is not 0 (indicates an UNDEF symbol) 189075e45495Sab * and is not in the range of special values above SHN_LORESERVE 189175e45495Sab * (excluding SHN_XINDEX, which is OK). 189275e45495Sab * - We have a valid section header for the target section 189375e45495Sab * 189475e45495Sab * If the above are all true, and the symbol position is not 189575e45495Sab * contained by the target section, this macro evaluates to 189675e45495Sab * True (1). Otherwise, False(0). 189775e45495Sab */ 189875e45495Sab #define SYM_LOC_BADADDR(_sdp, _sym, _type) \ 1899d579eb63Sab (_sym->st_size && dynsymsort_symtype[_type] && \ 190075e45495Sab (_sym->st_shndx != SHN_UNDEF) && \ 190175e45495Sab ((_sym->st_shndx < SHN_LORESERVE) || \ 190275e45495Sab (_sym->st_shndx == SHN_XINDEX)) && \ 190375e45495Sab _sdp->sd_isc && _sdp->sd_isc->is_shdr && \ 190475e45495Sab ((_sym->st_value + _sym->st_size) > _sdp->sd_isc->is_shdr->sh_size)) 190575e45495Sab 1906de777a60Sab Conv_inv_buf_t inv_buf; 19077c478bd9Sstevel@tonic-gate Sym *sym = (Sym *)isc->is_indata->d_buf; 19086b3ba5bdSAli Bahrami Word *symshndx = NULL; 19097c478bd9Sstevel@tonic-gate Shdr *shdr = isc->is_shdr; 19107c478bd9Sstevel@tonic-gate Sym_desc *sdp; 19117c478bd9Sstevel@tonic-gate size_t strsize; 19127c478bd9Sstevel@tonic-gate char *strs; 19137c478bd9Sstevel@tonic-gate uchar_t type, bind; 19147c478bd9Sstevel@tonic-gate Word ndx, hash, local, total; 19154f680cc6SAli Bahrami uchar_t osabi = ifl->ifl_ehdr->e_ident[EI_OSABI]; 19164f680cc6SAli Bahrami Half mach = ifl->ifl_ehdr->e_machine; 19177c478bd9Sstevel@tonic-gate Half etype = ifl->ifl_ehdr->e_type; 191875e45495Sab int etype_rel; 19197c478bd9Sstevel@tonic-gate const char *symsecname, *strsecname; 19204a8d0ea7SAli Bahrami Word symsecndx; 19217c478bd9Sstevel@tonic-gate avl_index_t where; 19226b3ba5bdSAli Bahrami int test_gnu_hidden_bit, weak; 1923*08278a5eSRod Evans Cap_desc *cdp = NULL; 1924*08278a5eSRod Evans Alist *cappairs = NULL; 19257c478bd9Sstevel@tonic-gate 19267c478bd9Sstevel@tonic-gate /* 19277c478bd9Sstevel@tonic-gate * Its possible that a file may contain more that one symbol table, 19287c478bd9Sstevel@tonic-gate * ie. .dynsym and .symtab in a shared library. Only process the first 19297c478bd9Sstevel@tonic-gate * table (here, we assume .dynsym comes before .symtab). 19307c478bd9Sstevel@tonic-gate */ 19317c478bd9Sstevel@tonic-gate if (ifl->ifl_symscnt) 19327c478bd9Sstevel@tonic-gate return (1); 19337c478bd9Sstevel@tonic-gate 19347c478bd9Sstevel@tonic-gate if (isc->is_symshndx) 19357c478bd9Sstevel@tonic-gate symshndx = isc->is_symshndx->is_indata->d_buf; 19367c478bd9Sstevel@tonic-gate 19375aefb655Srie DBG_CALL(Dbg_syms_process(ofl->ofl_lml, ifl)); 19387c478bd9Sstevel@tonic-gate 19394a8d0ea7SAli Bahrami symsecndx = isc->is_scnndx; 19407c478bd9Sstevel@tonic-gate if (isc->is_name) 19417c478bd9Sstevel@tonic-gate symsecname = isc->is_name; 19427c478bd9Sstevel@tonic-gate else 19437c478bd9Sstevel@tonic-gate symsecname = MSG_ORIG(MSG_STR_EMPTY); 19447c478bd9Sstevel@tonic-gate 19457c478bd9Sstevel@tonic-gate /* 19467c478bd9Sstevel@tonic-gate * From the symbol tables section header information determine which 19477c478bd9Sstevel@tonic-gate * strtab table is needed to locate the actual symbol names. 19487c478bd9Sstevel@tonic-gate */ 19497c478bd9Sstevel@tonic-gate if (ifl->ifl_flags & FLG_IF_HSTRTAB) { 19507c478bd9Sstevel@tonic-gate ndx = shdr->sh_link; 19517c478bd9Sstevel@tonic-gate if ((ndx == 0) || (ndx >= ifl->ifl_shnum)) { 19525aefb655Srie eprintf(ofl->ofl_lml, ERR_FATAL, 19534a8d0ea7SAli Bahrami MSG_INTL(MSG_FIL_INVSHLINK), ifl->ifl_name, 19544a8d0ea7SAli Bahrami EC_WORD(symsecndx), symsecname, EC_XWORD(ndx)); 19557c478bd9Sstevel@tonic-gate return (S_ERROR); 19567c478bd9Sstevel@tonic-gate } 19577c478bd9Sstevel@tonic-gate strsize = ifl->ifl_isdesc[ndx]->is_shdr->sh_size; 19587c478bd9Sstevel@tonic-gate strs = ifl->ifl_isdesc[ndx]->is_indata->d_buf; 19597c478bd9Sstevel@tonic-gate if (ifl->ifl_isdesc[ndx]->is_name) 19607c478bd9Sstevel@tonic-gate strsecname = ifl->ifl_isdesc[ndx]->is_name; 19617c478bd9Sstevel@tonic-gate else 19627c478bd9Sstevel@tonic-gate strsecname = MSG_ORIG(MSG_STR_EMPTY); 19637c478bd9Sstevel@tonic-gate } else { 19647c478bd9Sstevel@tonic-gate /* 19657c478bd9Sstevel@tonic-gate * There is no string table section in this input file 19667c478bd9Sstevel@tonic-gate * although there are symbols in this symbol table section. 19677c478bd9Sstevel@tonic-gate * This means that these symbols do not have names. 19687c478bd9Sstevel@tonic-gate * Currently, only scratch register symbols are allowed 19697c478bd9Sstevel@tonic-gate * not to have names. 19707c478bd9Sstevel@tonic-gate */ 19717c478bd9Sstevel@tonic-gate strsize = 0; 19727c478bd9Sstevel@tonic-gate strs = (char *)MSG_ORIG(MSG_STR_EMPTY); 19737c478bd9Sstevel@tonic-gate strsecname = MSG_ORIG(MSG_STR_EMPTY); 19747c478bd9Sstevel@tonic-gate } 19757c478bd9Sstevel@tonic-gate 19767c478bd9Sstevel@tonic-gate /* 19777c478bd9Sstevel@tonic-gate * Determine the number of local symbols together with the total 19787c478bd9Sstevel@tonic-gate * number we have to process. 19797c478bd9Sstevel@tonic-gate */ 19807c478bd9Sstevel@tonic-gate total = (Word)(shdr->sh_size / shdr->sh_entsize); 19817c478bd9Sstevel@tonic-gate local = shdr->sh_info; 19827c478bd9Sstevel@tonic-gate 19837c478bd9Sstevel@tonic-gate /* 19847c478bd9Sstevel@tonic-gate * Allocate a symbol table index array and a local symbol array 19857c478bd9Sstevel@tonic-gate * (global symbols are processed and added to the ofl->ofl_symbkt[] 19867c478bd9Sstevel@tonic-gate * array). If we are dealing with a relocatable object, allocate the 19877c478bd9Sstevel@tonic-gate * local symbol descriptors. If this isn't a relocatable object we 19887c478bd9Sstevel@tonic-gate * still have to process any shared object locals to determine if any 19897c478bd9Sstevel@tonic-gate * register symbols exist. Although these aren't added to the output 19907c478bd9Sstevel@tonic-gate * image, they are used as part of symbol resolution. 19917c478bd9Sstevel@tonic-gate */ 19927c478bd9Sstevel@tonic-gate if ((ifl->ifl_oldndx = libld_malloc((size_t)(total * 19936b3ba5bdSAli Bahrami sizeof (Sym_desc *)))) == NULL) 19947c478bd9Sstevel@tonic-gate return (S_ERROR); 1995d579eb63Sab etype_rel = (etype == ET_REL); 199675e45495Sab if (etype_rel && local) { 19977c478bd9Sstevel@tonic-gate if ((ifl->ifl_locs = 19986b3ba5bdSAli Bahrami libld_calloc(sizeof (Sym_desc), local)) == NULL) 19997c478bd9Sstevel@tonic-gate return (S_ERROR); 20007c478bd9Sstevel@tonic-gate /* LINTED */ 20017c478bd9Sstevel@tonic-gate ifl->ifl_locscnt = (Word)local; 20027c478bd9Sstevel@tonic-gate } 20037c478bd9Sstevel@tonic-gate ifl->ifl_symscnt = total; 20047c478bd9Sstevel@tonic-gate 20057c478bd9Sstevel@tonic-gate /* 20067c478bd9Sstevel@tonic-gate * If there are local symbols to save add them to the symbol table 20077c478bd9Sstevel@tonic-gate * index array. 20087c478bd9Sstevel@tonic-gate */ 20097c478bd9Sstevel@tonic-gate if (local) { 201024b9abbaSab int allow_ldynsym = OFL_ALLOW_LDYNSYM(ofl); 201124b9abbaSab Sym_desc *last_file_sdp = NULL; 201224b9abbaSab int last_file_ndx = 0; 201324b9abbaSab 20147c478bd9Sstevel@tonic-gate for (sym++, ndx = 1; ndx < local; sym++, ndx++) { 2015635216b6SRod Evans sd_flag_t sdflags = FLG_SY_CLEAN; 2016635216b6SRod Evans Word shndx; 20177c478bd9Sstevel@tonic-gate const char *name; 20187c478bd9Sstevel@tonic-gate Sym_desc *rsdp; 2019ba2be530Sab int shndx_bad = 0; 20201da7e599SAli Bahrami int symtab_enter = 1; 20217c478bd9Sstevel@tonic-gate 20227c478bd9Sstevel@tonic-gate /* 2023ba2be530Sab * Determine and validate the associated section index. 20247c478bd9Sstevel@tonic-gate */ 2025ba2be530Sab if (symshndx && (sym->st_shndx == SHN_XINDEX)) { 20267c478bd9Sstevel@tonic-gate shndx = symshndx[ndx]; 2027ba2be530Sab } else if ((shndx = sym->st_shndx) >= SHN_LORESERVE) { 20287c478bd9Sstevel@tonic-gate sdflags |= FLG_SY_SPECSEC; 2029ba2be530Sab } else if (shndx > ifl->ifl_ehdr->e_shnum) { 2030ba2be530Sab /* We need the name before we can issue error */ 2031ba2be530Sab shndx_bad = 1; 2032ba2be530Sab } 20337c478bd9Sstevel@tonic-gate 20347c478bd9Sstevel@tonic-gate /* 20357c478bd9Sstevel@tonic-gate * Check if st_name has a valid value or not. 20367c478bd9Sstevel@tonic-gate */ 20375aefb655Srie if ((name = string(ofl, ifl, sym, strs, strsize, ndx, 20384a8d0ea7SAli Bahrami shndx, symsecndx, symsecname, strsecname, 20394a8d0ea7SAli Bahrami &sdflags)) == NULL) { 20407c478bd9Sstevel@tonic-gate ofl->ofl_flags |= FLG_OF_FATAL; 20417c478bd9Sstevel@tonic-gate continue; 20427c478bd9Sstevel@tonic-gate } 20437c478bd9Sstevel@tonic-gate 2044ba2be530Sab /* 2045ba2be530Sab * Now that we have the name, if the section index 2046ba2be530Sab * was bad, report it. 2047ba2be530Sab */ 2048ba2be530Sab if (shndx_bad) { 2049ba2be530Sab eprintf(ofl->ofl_lml, ERR_WARNING, 2050ba2be530Sab MSG_INTL(MSG_SYM_INVSHNDX), 20514a8d0ea7SAli Bahrami demangle_symname(name, symsecname, ndx), 2052ba2be530Sab ifl->ifl_name, 20534f680cc6SAli Bahrami conv_sym_shndx(osabi, mach, sym->st_shndx, 20544f680cc6SAli Bahrami CONV_FMT_DECIMAL, &inv_buf)); 2055ba2be530Sab continue; 2056ba2be530Sab } 2057ba2be530Sab 20587c478bd9Sstevel@tonic-gate /* 20597c478bd9Sstevel@tonic-gate * If this local symbol table originates from a shared 20607c478bd9Sstevel@tonic-gate * object, then we're only interested in recording 20617c478bd9Sstevel@tonic-gate * register symbols. As local symbol descriptors aren't 20627c478bd9Sstevel@tonic-gate * allocated for shared objects, one will be allocated 20637c478bd9Sstevel@tonic-gate * to associated with the register symbol. This symbol 20647c478bd9Sstevel@tonic-gate * won't become part of the output image, but we must 20657c478bd9Sstevel@tonic-gate * process it to test for register conflicts. 20667c478bd9Sstevel@tonic-gate */ 206728bda19cSRod Evans rsdp = sdp = NULL; 20687c478bd9Sstevel@tonic-gate if (sdflags & FLG_SY_REGSYM) { 2069ba2be530Sab /* 2070ba2be530Sab * The presence of FLG_SY_REGSYM means that 2071ba2be530Sab * the pointers in ld_targ.t_ms are non-NULL. 2072ba2be530Sab */ 2073ba2be530Sab rsdp = (*ld_targ.t_ms.ms_reg_find)(sym, ofl); 2074ba2be530Sab if (rsdp != 0) { 20757c478bd9Sstevel@tonic-gate /* 20767c478bd9Sstevel@tonic-gate * The fact that another register def- 20777c478bd9Sstevel@tonic-gate * inition has been found is fatal. 20787c478bd9Sstevel@tonic-gate * Call the verification routine to get 20797c478bd9Sstevel@tonic-gate * the error message and move on. 20807c478bd9Sstevel@tonic-gate */ 2081ba2be530Sab (void) (*ld_targ.t_ms.ms_reg_check) 2082ba2be530Sab (rsdp, sym, name, ifl, ofl); 20837c478bd9Sstevel@tonic-gate continue; 20847c478bd9Sstevel@tonic-gate } 20857c478bd9Sstevel@tonic-gate 20867c478bd9Sstevel@tonic-gate if (etype == ET_DYN) { 20877c478bd9Sstevel@tonic-gate if ((sdp = libld_calloc( 20886b3ba5bdSAli Bahrami sizeof (Sym_desc), 1)) == NULL) 20897c478bd9Sstevel@tonic-gate return (S_ERROR); 20907c478bd9Sstevel@tonic-gate sdp->sd_ref = REF_DYN_SEEN; 2091ca4eed8bSAli Bahrami 2092ca4eed8bSAli Bahrami /* Will not appear in output object */ 20931da7e599SAli Bahrami symtab_enter = 0; 20947c478bd9Sstevel@tonic-gate } 20957c478bd9Sstevel@tonic-gate } else if (etype == ET_DYN) 20967c478bd9Sstevel@tonic-gate continue; 20977c478bd9Sstevel@tonic-gate 20987c478bd9Sstevel@tonic-gate /* 20997c478bd9Sstevel@tonic-gate * Fill in the remaining symbol descriptor information. 21007c478bd9Sstevel@tonic-gate */ 21016b3ba5bdSAli Bahrami if (sdp == NULL) { 21027c478bd9Sstevel@tonic-gate sdp = &(ifl->ifl_locs[ndx]); 21037c478bd9Sstevel@tonic-gate sdp->sd_ref = REF_REL_NEED; 2104635216b6SRod Evans sdp->sd_symndx = ndx; 21057c478bd9Sstevel@tonic-gate } 21066b3ba5bdSAli Bahrami if (rsdp == NULL) { 21077c478bd9Sstevel@tonic-gate sdp->sd_name = name; 21087c478bd9Sstevel@tonic-gate sdp->sd_sym = sym; 21097c478bd9Sstevel@tonic-gate sdp->sd_shndx = shndx; 21107c478bd9Sstevel@tonic-gate sdp->sd_flags = sdflags; 21117c478bd9Sstevel@tonic-gate sdp->sd_file = ifl; 21127c478bd9Sstevel@tonic-gate ifl->ifl_oldndx[ndx] = sdp; 21137c478bd9Sstevel@tonic-gate } 21147c478bd9Sstevel@tonic-gate 21155aefb655Srie DBG_CALL(Dbg_syms_entry(ofl->ofl_lml, ndx, sdp)); 21167c478bd9Sstevel@tonic-gate 21177c478bd9Sstevel@tonic-gate /* 21187c478bd9Sstevel@tonic-gate * Reclassify any SHN_SUNW_IGNORE symbols to SHN_UNDEF 21197c478bd9Sstevel@tonic-gate * so as to simplify future processing. 21207c478bd9Sstevel@tonic-gate */ 21210bc07c75Srie if (sym->st_shndx == SHN_SUNW_IGNORE) { 21227c478bd9Sstevel@tonic-gate sdp->sd_shndx = shndx = SHN_UNDEF; 2123635216b6SRod Evans sdp->sd_flags |= (FLG_SY_IGNORE | FLG_SY_ELIM); 21247c478bd9Sstevel@tonic-gate } 21257c478bd9Sstevel@tonic-gate 21267c478bd9Sstevel@tonic-gate /* 21277c478bd9Sstevel@tonic-gate * Process any register symbols. 21287c478bd9Sstevel@tonic-gate */ 21297c478bd9Sstevel@tonic-gate if (sdp->sd_flags & FLG_SY_REGSYM) { 21307c478bd9Sstevel@tonic-gate /* 21317c478bd9Sstevel@tonic-gate * Add a diagnostic to indicate we've caught a 21327c478bd9Sstevel@tonic-gate * register symbol, as this can be useful if a 21337c478bd9Sstevel@tonic-gate * register conflict is later discovered. 21347c478bd9Sstevel@tonic-gate */ 21355aefb655Srie DBG_CALL(Dbg_syms_entered(ofl, sym, sdp)); 21367c478bd9Sstevel@tonic-gate 21377c478bd9Sstevel@tonic-gate /* 21387c478bd9Sstevel@tonic-gate * If this register symbol hasn't already been 21397c478bd9Sstevel@tonic-gate * recorded, enter it now. 2140ba2be530Sab * 2141ba2be530Sab * The presence of FLG_SY_REGSYM means that 2142ba2be530Sab * the pointers in ld_targ.t_ms are non-NULL. 21437c478bd9Sstevel@tonic-gate */ 21446b3ba5bdSAli Bahrami if ((rsdp == NULL) && 2145ba2be530Sab ((*ld_targ.t_ms.ms_reg_enter)(sdp, ofl) == 2146ba2be530Sab 0)) 21477c478bd9Sstevel@tonic-gate return (S_ERROR); 21487c478bd9Sstevel@tonic-gate } 21497c478bd9Sstevel@tonic-gate 21507c478bd9Sstevel@tonic-gate /* 21517c478bd9Sstevel@tonic-gate * Assign an input section. 21527c478bd9Sstevel@tonic-gate */ 21530bc07c75Srie if ((sym->st_shndx != SHN_UNDEF) && 21547c478bd9Sstevel@tonic-gate ((sdp->sd_flags & FLG_SY_SPECSEC) == 0)) 21557c478bd9Sstevel@tonic-gate sdp->sd_isc = ifl->ifl_isdesc[shndx]; 21567c478bd9Sstevel@tonic-gate 21577c478bd9Sstevel@tonic-gate /* 21587c478bd9Sstevel@tonic-gate * If this symbol falls within the range of a section 21597c478bd9Sstevel@tonic-gate * being discarded, then discard the symbol itself. 21607c478bd9Sstevel@tonic-gate * There is no reason to keep this local symbol. 21617c478bd9Sstevel@tonic-gate */ 21627c478bd9Sstevel@tonic-gate if (sdp->sd_isc && 21637c478bd9Sstevel@tonic-gate (sdp->sd_isc->is_flags & FLG_IS_DISCARD)) { 21647c478bd9Sstevel@tonic-gate sdp->sd_flags |= FLG_SY_ISDISC; 2165a194faf8Srie DBG_CALL(Dbg_syms_discarded(ofl->ofl_lml, sdp)); 21667c478bd9Sstevel@tonic-gate continue; 21677c478bd9Sstevel@tonic-gate } 21687c478bd9Sstevel@tonic-gate 21697c478bd9Sstevel@tonic-gate /* 21707c478bd9Sstevel@tonic-gate * Skip any section symbols as new versions of these 21717c478bd9Sstevel@tonic-gate * will be created. 21727c478bd9Sstevel@tonic-gate */ 21737c478bd9Sstevel@tonic-gate if ((type = ELF_ST_TYPE(sym->st_info)) == STT_SECTION) { 21740bc07c75Srie if (sym->st_shndx == SHN_UNDEF) { 21755aefb655Srie eprintf(ofl->ofl_lml, ERR_WARNING, 21767c478bd9Sstevel@tonic-gate MSG_INTL(MSG_SYM_INVSHNDX), 21774a8d0ea7SAli Bahrami demangle_symname(name, symsecname, 2178ba2be530Sab ndx), ifl->ifl_name, 21794f680cc6SAli Bahrami conv_sym_shndx(osabi, mach, 21804f680cc6SAli Bahrami sym->st_shndx, CONV_FMT_DECIMAL, 2181de777a60Sab &inv_buf)); 21827c478bd9Sstevel@tonic-gate } 21837c478bd9Sstevel@tonic-gate continue; 21847c478bd9Sstevel@tonic-gate } 21857c478bd9Sstevel@tonic-gate 218675e45495Sab /* 218775e45495Sab * For a relocatable object, if this symbol is defined 218875e45495Sab * and has non-zero length and references an address 218975e45495Sab * within an associated section, then check its extents 219075e45495Sab * to make sure the section boundaries encompass it. 219175e45495Sab * If they don't, the ELF file is corrupt. 219275e45495Sab */ 219324b9abbaSab if (etype_rel) { 219424b9abbaSab if (SYM_LOC_BADADDR(sdp, sym, type)) { 219524b9abbaSab issue_badaddr_msg(ifl, ofl, sdp, 219624b9abbaSab sym, shndx); 2197ca4eed8bSAli Bahrami if (ofl->ofl_flags & FLG_OF_FATAL) 2198ca4eed8bSAli Bahrami continue; 219924b9abbaSab } 220024b9abbaSab 220124b9abbaSab /* 220224b9abbaSab * We have observed relocatable objects 220324b9abbaSab * containing identical adjacent STT_FILE 220424b9abbaSab * symbols. Discard any other than the first, 220524b9abbaSab * as they are all equivalent and the extras 220624b9abbaSab * do not add information. 220724b9abbaSab * 220824b9abbaSab * For the purpose of this test, we assume 220924b9abbaSab * that only the symbol type and the string 221024b9abbaSab * table offset (st_name) matter. 221124b9abbaSab */ 221224b9abbaSab if (type == STT_FILE) { 221324b9abbaSab int toss = (last_file_sdp != NULL) && 221424b9abbaSab ((ndx - 1) == last_file_ndx) && 221524b9abbaSab (sym->st_name == 221624b9abbaSab last_file_sdp->sd_sym->st_name); 221724b9abbaSab 221824b9abbaSab last_file_sdp = sdp; 221924b9abbaSab last_file_ndx = ndx; 222024b9abbaSab if (toss) { 222124b9abbaSab sdp->sd_flags |= FLG_SY_INVALID; 222224b9abbaSab DBG_CALL(Dbg_syms_dup_discarded( 222324b9abbaSab ofl->ofl_lml, ndx, sdp)); 222424b9abbaSab continue; 222524b9abbaSab } 222624b9abbaSab } 222775e45495Sab } 222875e45495Sab 222924b9abbaSab 22307c478bd9Sstevel@tonic-gate /* 22317c478bd9Sstevel@tonic-gate * Sanity check for TLS 22327c478bd9Sstevel@tonic-gate */ 22330bc07c75Srie if ((sym->st_size != 0) && ((type == STT_TLS) && 22340bc07c75Srie (sym->st_shndx != SHN_COMMON))) { 22357c478bd9Sstevel@tonic-gate Is_desc *isp = sdp->sd_isc; 22367c478bd9Sstevel@tonic-gate 22376b3ba5bdSAli Bahrami if ((isp == NULL) || (isp->is_shdr == NULL) || 22387c478bd9Sstevel@tonic-gate ((isp->is_shdr->sh_flags & SHF_TLS) == 0)) { 22395aefb655Srie eprintf(ofl->ofl_lml, ERR_FATAL, 22407c478bd9Sstevel@tonic-gate MSG_INTL(MSG_SYM_TLS), 22417c478bd9Sstevel@tonic-gate demangle(sdp->sd_name), 22427c478bd9Sstevel@tonic-gate ifl->ifl_name); 22437c478bd9Sstevel@tonic-gate ofl->ofl_flags |= FLG_OF_FATAL; 22447c478bd9Sstevel@tonic-gate continue; 22457c478bd9Sstevel@tonic-gate } 22467c478bd9Sstevel@tonic-gate } 22477c478bd9Sstevel@tonic-gate 22487c478bd9Sstevel@tonic-gate /* 22497c478bd9Sstevel@tonic-gate * Carry our some basic sanity checks (these are just 22507c478bd9Sstevel@tonic-gate * some of the erroneous symbol entries we've come 22517c478bd9Sstevel@tonic-gate * across, there's probably a lot more). The symbol 22527c478bd9Sstevel@tonic-gate * will not be carried forward to the output file, which 22537c478bd9Sstevel@tonic-gate * won't be a problem unless a relocation is required 22547c478bd9Sstevel@tonic-gate * against it. 22557c478bd9Sstevel@tonic-gate */ 22567c478bd9Sstevel@tonic-gate if (((sdp->sd_flags & FLG_SY_SPECSEC) && 22570bc07c75Srie ((sym->st_shndx == SHN_COMMON)) || 22580bc07c75Srie ((type == STT_FILE) && 22590bc07c75Srie (sym->st_shndx != SHN_ABS))) || 22606b3ba5bdSAli Bahrami (sdp->sd_isc && (sdp->sd_isc->is_osdesc == NULL))) { 22615aefb655Srie eprintf(ofl->ofl_lml, ERR_WARNING, 22625aefb655Srie MSG_INTL(MSG_SYM_INVSHNDX), 22634a8d0ea7SAli Bahrami demangle_symname(name, symsecname, ndx), 2264ba2be530Sab ifl->ifl_name, 22654f680cc6SAli Bahrami conv_sym_shndx(osabi, mach, sym->st_shndx, 22664f680cc6SAli Bahrami CONV_FMT_DECIMAL, &inv_buf)); 22677c478bd9Sstevel@tonic-gate sdp->sd_isc = NULL; 22687c478bd9Sstevel@tonic-gate sdp->sd_flags |= FLG_SY_INVALID; 22697c478bd9Sstevel@tonic-gate continue; 22707c478bd9Sstevel@tonic-gate } 22717c478bd9Sstevel@tonic-gate 22727c478bd9Sstevel@tonic-gate /* 22737c478bd9Sstevel@tonic-gate * As these local symbols will become part of the output 22747c478bd9Sstevel@tonic-gate * image, record their number and name string size. 22757c478bd9Sstevel@tonic-gate * Globals are counted after all input file processing 22767c478bd9Sstevel@tonic-gate * (and hence symbol resolution) is complete during 22777c478bd9Sstevel@tonic-gate * sym_validate(). 22787c478bd9Sstevel@tonic-gate */ 22791da7e599SAli Bahrami if (!(ofl->ofl_flags & FLG_OF_REDLSYM) && 22801da7e599SAli Bahrami symtab_enter) { 22817c478bd9Sstevel@tonic-gate ofl->ofl_locscnt++; 22827c478bd9Sstevel@tonic-gate 22837c478bd9Sstevel@tonic-gate if ((((sdp->sd_flags & FLG_SY_REGSYM) == 0) || 22847c478bd9Sstevel@tonic-gate sym->st_name) && (st_insert(ofl->ofl_strtab, 22857c478bd9Sstevel@tonic-gate sdp->sd_name) == -1)) 22867c478bd9Sstevel@tonic-gate return (S_ERROR); 22879039eeafSab 22889039eeafSab if (allow_ldynsym && sym->st_name && 2289d579eb63Sab ldynsym_symtype[type]) { 22909039eeafSab ofl->ofl_dynlocscnt++; 22919039eeafSab if (st_insert(ofl->ofl_dynstrtab, 22929039eeafSab sdp->sd_name) == -1) 22939039eeafSab return (S_ERROR); 2294d579eb63Sab /* Include it in sort section? */ 2295d579eb63Sab DYNSORT_COUNT(sdp, sym, type, ++); 22969039eeafSab } 22977c478bd9Sstevel@tonic-gate } 22987c478bd9Sstevel@tonic-gate } 22997c478bd9Sstevel@tonic-gate } 23007c478bd9Sstevel@tonic-gate 2301d840867fSab /* 2302d840867fSab * The GNU ld interprets the top bit of the 16-bit Versym value 2303d840867fSab * (0x8000) as the "hidden" bit. If this bit is set, the linker 2304d840867fSab * is supposed to act as if that symbol does not exist. The Solaris 2305d840867fSab * linker does not support this mechanism, or the model of interface 2306d840867fSab * evolution that it allows, but we honor it in GNU ld produced 2307d840867fSab * objects in order to interoperate with them. 2308d840867fSab * 2309d840867fSab * Determine if we should honor the GNU hidden bit for this file. 2310d840867fSab */ 2311d840867fSab test_gnu_hidden_bit = ((ifl->ifl_flags & FLG_IF_GNUVER) != 0) && 2312d840867fSab (ifl->ifl_versym != NULL); 2313d840867fSab 2314*08278a5eSRod Evans /* 2315*08278a5eSRod Evans * Determine whether object capabilities for this file are being 2316*08278a5eSRod Evans * converted into symbol capabilities. If so, global function symbols, 2317*08278a5eSRod Evans * and initialized global data symbols, need special translation and 2318*08278a5eSRod Evans * processing. 2319*08278a5eSRod Evans */ 2320*08278a5eSRod Evans if ((etype == ET_REL) && (ifl->ifl_flags & FLG_IF_OTOSCAP)) 2321*08278a5eSRod Evans cdp = ifl->ifl_caps; 2322*08278a5eSRod Evans 23237c478bd9Sstevel@tonic-gate /* 23247c478bd9Sstevel@tonic-gate * Now scan the global symbols entering them in the internal symbol 23257c478bd9Sstevel@tonic-gate * table or resolving them as necessary. 23267c478bd9Sstevel@tonic-gate */ 23277c478bd9Sstevel@tonic-gate sym = (Sym *)isc->is_indata->d_buf; 23287c478bd9Sstevel@tonic-gate sym += local; 23296b3ba5bdSAli Bahrami weak = 0; 23307c478bd9Sstevel@tonic-gate /* LINTED */ 23317c478bd9Sstevel@tonic-gate for (ndx = (int)local; ndx < total; sym++, ndx++) { 23327c478bd9Sstevel@tonic-gate const char *name; 2333635216b6SRod Evans sd_flag_t sdflags = 0; 2334635216b6SRod Evans Word shndx; 2335ba2be530Sab int shndx_bad = 0; 2336635216b6SRod Evans Sym *nsym = sym; 2337*08278a5eSRod Evans Cap_pair *cpp = NULL; 2338*08278a5eSRod Evans uchar_t ntype; 23397c478bd9Sstevel@tonic-gate 23407c478bd9Sstevel@tonic-gate /* 2341ba2be530Sab * Determine and validate the associated section index. 23427c478bd9Sstevel@tonic-gate */ 2343635216b6SRod Evans if (symshndx && (nsym->st_shndx == SHN_XINDEX)) { 23447c478bd9Sstevel@tonic-gate shndx = symshndx[ndx]; 2345635216b6SRod Evans } else if ((shndx = nsym->st_shndx) >= SHN_LORESERVE) { 2346ba2be530Sab sdflags |= FLG_SY_SPECSEC; 2347ba2be530Sab } else if (shndx > ifl->ifl_ehdr->e_shnum) { 2348ba2be530Sab /* We need the name before we can issue error */ 2349ba2be530Sab shndx_bad = 1; 23507c478bd9Sstevel@tonic-gate } 23517c478bd9Sstevel@tonic-gate 23527c478bd9Sstevel@tonic-gate /* 23537c478bd9Sstevel@tonic-gate * Check if st_name has a valid value or not. 23547c478bd9Sstevel@tonic-gate */ 2355635216b6SRod Evans if ((name = string(ofl, ifl, nsym, strs, strsize, ndx, shndx, 23564a8d0ea7SAli Bahrami symsecndx, symsecname, strsecname, &sdflags)) == NULL) { 23577c478bd9Sstevel@tonic-gate ofl->ofl_flags |= FLG_OF_FATAL; 23587c478bd9Sstevel@tonic-gate continue; 23597c478bd9Sstevel@tonic-gate } 23607c478bd9Sstevel@tonic-gate 2361ba2be530Sab /* 2362*08278a5eSRod Evans * Now that we have the name, report an erroneous section index. 2363ba2be530Sab */ 2364ba2be530Sab if (shndx_bad) { 2365ba2be530Sab eprintf(ofl->ofl_lml, ERR_WARNING, 2366ba2be530Sab MSG_INTL(MSG_SYM_INVSHNDX), 23674a8d0ea7SAli Bahrami demangle_symname(name, symsecname, ndx), 2368ba2be530Sab ifl->ifl_name, 2369635216b6SRod Evans conv_sym_shndx(osabi, mach, nsym->st_shndx, 23704f680cc6SAli Bahrami CONV_FMT_DECIMAL, &inv_buf)); 2371ba2be530Sab continue; 2372ba2be530Sab } 2373ba2be530Sab 23743b41b08bSab /* 2375d840867fSab * Test for the GNU hidden bit, and ignore symbols that 2376d840867fSab * have it set. 23773b41b08bSab */ 2378d840867fSab if (test_gnu_hidden_bit && 2379d840867fSab ((ifl->ifl_versym[ndx] & 0x8000) != 0)) 23803b41b08bSab continue; 23813b41b08bSab 23827c478bd9Sstevel@tonic-gate /* 23837c478bd9Sstevel@tonic-gate * The linker itself will generate symbols for _end, _etext, 23847c478bd9Sstevel@tonic-gate * _edata, _DYNAMIC and _PROCEDURE_LINKAGE_TABLE_, so don't 23857c478bd9Sstevel@tonic-gate * bother entering these symbols from shared objects. This 23867c478bd9Sstevel@tonic-gate * results in some wasted resolution processing, which is hard 23877c478bd9Sstevel@tonic-gate * to feel, but if nothing else, pollutes diagnostic relocation 23887c478bd9Sstevel@tonic-gate * output. 23897c478bd9Sstevel@tonic-gate */ 2390635216b6SRod Evans if (name[0] && (etype == ET_DYN) && (nsym->st_size == 0) && 2391635216b6SRod Evans (ELF_ST_TYPE(nsym->st_info) == STT_OBJECT) && 23927c478bd9Sstevel@tonic-gate (name[0] == '_') && ((name[1] == 'e') || 23937c478bd9Sstevel@tonic-gate (name[1] == 'D') || (name[1] == 'P')) && 23947c478bd9Sstevel@tonic-gate ((strcmp(name, MSG_ORIG(MSG_SYM_ETEXT_U)) == 0) || 23957c478bd9Sstevel@tonic-gate (strcmp(name, MSG_ORIG(MSG_SYM_EDATA_U)) == 0) || 23967c478bd9Sstevel@tonic-gate (strcmp(name, MSG_ORIG(MSG_SYM_END_U)) == 0) || 23977c478bd9Sstevel@tonic-gate (strcmp(name, MSG_ORIG(MSG_SYM_DYNAMIC_U)) == 0) || 23987c478bd9Sstevel@tonic-gate (strcmp(name, MSG_ORIG(MSG_SYM_PLKTBL_U)) == 0))) { 23997c478bd9Sstevel@tonic-gate ifl->ifl_oldndx[ndx] = 0; 24007c478bd9Sstevel@tonic-gate continue; 24017c478bd9Sstevel@tonic-gate } 24027c478bd9Sstevel@tonic-gate 2403cdcc71c0SAli Bahrami /* 2404cdcc71c0SAli Bahrami * The '-z wrap=XXX' option emulates the GNU ld --wrap=XXX 2405cdcc71c0SAli Bahrami * option. When XXX is the symbol to be wrapped: 2406cdcc71c0SAli Bahrami * 2407*08278a5eSRod Evans * - An undefined reference to XXX is converted to __wrap_XXX 2408*08278a5eSRod Evans * - An undefined reference to __real_XXX is converted to XXX 2409cdcc71c0SAli Bahrami * 2410cdcc71c0SAli Bahrami * The idea is that the user can supply a wrapper function 2411cdcc71c0SAli Bahrami * __wrap_XXX that does some work, and then uses the name 2412cdcc71c0SAli Bahrami * __real_XXX to pass the call on to the real function. The 2413cdcc71c0SAli Bahrami * wrapper objects are linked with the original unmodified 2414cdcc71c0SAli Bahrami * objects to produce a wrapped version of the output object. 2415cdcc71c0SAli Bahrami */ 2416cdcc71c0SAli Bahrami if (ofl->ofl_wrap && name[0] && (shndx == SHN_UNDEF)) { 2417cdcc71c0SAli Bahrami WrapSymNode wsn, *wsnp; 2418cdcc71c0SAli Bahrami 2419cdcc71c0SAli Bahrami /* 2420cdcc71c0SAli Bahrami * If this is the __real_XXX form, advance the 2421cdcc71c0SAli Bahrami * pointer to reference the wrapped name. 2422cdcc71c0SAli Bahrami */ 2423cdcc71c0SAli Bahrami wsn.wsn_name = name; 2424cdcc71c0SAli Bahrami if ((*name == '_') && 2425cdcc71c0SAli Bahrami (strncmp(name, MSG_ORIG(MSG_STR_UU_REAL_U), 2426cdcc71c0SAli Bahrami MSG_STR_UU_REAL_U_SIZE) == 0)) 2427cdcc71c0SAli Bahrami wsn.wsn_name += MSG_STR_UU_REAL_U_SIZE; 2428cdcc71c0SAli Bahrami 2429cdcc71c0SAli Bahrami /* 2430cdcc71c0SAli Bahrami * Is this symbol in the wrap AVL tree? If so, map 2431cdcc71c0SAli Bahrami * XXX to __wrap_XXX, and __real_XXX to XXX. Note that 2432cdcc71c0SAli Bahrami * wsn.wsn_name will equal the current value of name 2433cdcc71c0SAli Bahrami * if the __real_ prefix is not present. 2434cdcc71c0SAli Bahrami */ 2435cdcc71c0SAli Bahrami if ((wsnp = avl_find(ofl->ofl_wrap, &wsn, 0)) != NULL) { 2436cdcc71c0SAli Bahrami const char *old_name = name; 2437cdcc71c0SAli Bahrami 2438cdcc71c0SAli Bahrami name = (wsn.wsn_name == name) ? 2439cdcc71c0SAli Bahrami wsnp->wsn_wrapname : wsn.wsn_name; 2440cdcc71c0SAli Bahrami DBG_CALL(Dbg_syms_wrap(ofl->ofl_lml, ndx, 2441cdcc71c0SAli Bahrami old_name, name)); 2442cdcc71c0SAli Bahrami } 2443cdcc71c0SAli Bahrami } 2444cdcc71c0SAli Bahrami 24457c478bd9Sstevel@tonic-gate /* 24467c478bd9Sstevel@tonic-gate * Determine and validate the symbols binding. 24477c478bd9Sstevel@tonic-gate */ 2448635216b6SRod Evans bind = ELF_ST_BIND(nsym->st_info); 24497c478bd9Sstevel@tonic-gate if ((bind != STB_GLOBAL) && (bind != STB_WEAK)) { 24505aefb655Srie eprintf(ofl->ofl_lml, ERR_WARNING, 2451ba2be530Sab MSG_INTL(MSG_SYM_NONGLOB), 24524a8d0ea7SAli Bahrami demangle_symname(name, symsecname, ndx), 2453de777a60Sab ifl->ifl_name, 2454de777a60Sab conv_sym_info_bind(bind, 0, &inv_buf)); 24557c478bd9Sstevel@tonic-gate continue; 24567c478bd9Sstevel@tonic-gate } 24576b3ba5bdSAli Bahrami if (bind == STB_WEAK) 24586b3ba5bdSAli Bahrami weak++; 24597c478bd9Sstevel@tonic-gate 24607c478bd9Sstevel@tonic-gate /* 24617c478bd9Sstevel@tonic-gate * If this symbol falls within the range of a section being 24627c478bd9Sstevel@tonic-gate * discarded, then discard the symbol itself. 24637c478bd9Sstevel@tonic-gate */ 24647c478bd9Sstevel@tonic-gate if (((sdflags & FLG_SY_SPECSEC) == 0) && 2465635216b6SRod Evans (nsym->st_shndx != SHN_UNDEF)) { 24667c478bd9Sstevel@tonic-gate Is_desc *isp; 24677c478bd9Sstevel@tonic-gate 24687c478bd9Sstevel@tonic-gate if (shndx >= ifl->ifl_shnum) { 24697c478bd9Sstevel@tonic-gate /* 24707c478bd9Sstevel@tonic-gate * Carry our some basic sanity checks 24717c478bd9Sstevel@tonic-gate * The symbol will not be carried forward to 24727c478bd9Sstevel@tonic-gate * the output file, which won't be a problem 24737c478bd9Sstevel@tonic-gate * unless a relocation is required against it. 24747c478bd9Sstevel@tonic-gate */ 24755aefb655Srie eprintf(ofl->ofl_lml, ERR_WARNING, 2476ba2be530Sab MSG_INTL(MSG_SYM_INVSHNDX), 24774a8d0ea7SAli Bahrami demangle_symname(name, symsecname, ndx), 24780bc07c75Srie ifl->ifl_name, 2479635216b6SRod Evans conv_sym_shndx(osabi, mach, nsym->st_shndx, 24804f680cc6SAli Bahrami CONV_FMT_DECIMAL, &inv_buf)); 24817c478bd9Sstevel@tonic-gate continue; 24827c478bd9Sstevel@tonic-gate } 24837c478bd9Sstevel@tonic-gate 24847c478bd9Sstevel@tonic-gate isp = ifl->ifl_isdesc[shndx]; 24857c478bd9Sstevel@tonic-gate if (isp && (isp->is_flags & FLG_IS_DISCARD)) { 24867c478bd9Sstevel@tonic-gate if ((sdp = 24876b3ba5bdSAli Bahrami libld_calloc(sizeof (Sym_desc), 1)) == NULL) 24887c478bd9Sstevel@tonic-gate return (S_ERROR); 24897c478bd9Sstevel@tonic-gate 24907c478bd9Sstevel@tonic-gate /* 24917c478bd9Sstevel@tonic-gate * Create a dummy symbol entry so that if we 24927c478bd9Sstevel@tonic-gate * find any references to this discarded symbol 24937c478bd9Sstevel@tonic-gate * we can compensate. 24947c478bd9Sstevel@tonic-gate */ 24957c478bd9Sstevel@tonic-gate sdp->sd_name = name; 2496635216b6SRod Evans sdp->sd_sym = nsym; 24977c478bd9Sstevel@tonic-gate sdp->sd_file = ifl; 24987c478bd9Sstevel@tonic-gate sdp->sd_isc = isp; 24997c478bd9Sstevel@tonic-gate sdp->sd_flags = FLG_SY_ISDISC; 25007c478bd9Sstevel@tonic-gate ifl->ifl_oldndx[ndx] = sdp; 25017c478bd9Sstevel@tonic-gate 2502a194faf8Srie DBG_CALL(Dbg_syms_discarded(ofl->ofl_lml, sdp)); 25037c478bd9Sstevel@tonic-gate continue; 25047c478bd9Sstevel@tonic-gate } 25057c478bd9Sstevel@tonic-gate } 25067c478bd9Sstevel@tonic-gate 2507*08278a5eSRod Evans /* 2508*08278a5eSRod Evans * If object capabilities for this file are being converted 2509*08278a5eSRod Evans * into symbol capabilities, then: 2510*08278a5eSRod Evans * 2511*08278a5eSRod Evans * - Any global function, or initialized global data symbol 2512*08278a5eSRod Evans * definitions (ie., those that are not associated with 2513*08278a5eSRod Evans * special symbol types, ie., ABS, COMMON, etc.), and which 2514*08278a5eSRod Evans * have not been reduced to locals, are converted to symbol 2515*08278a5eSRod Evans * references (UNDEF). This ensures that any reference to 2516*08278a5eSRod Evans * the original symbol, for example from a relocation, get 2517*08278a5eSRod Evans * associated to a capabilities family lead symbol, ie., a 2518*08278a5eSRod Evans * generic instance. 2519*08278a5eSRod Evans * 2520*08278a5eSRod Evans * - For each global function, or object symbol definition, 2521*08278a5eSRod Evans * a new local symbol is created. The function or object 2522*08278a5eSRod Evans * is renamed using the capabilities CA_SUNW_ID definition 2523*08278a5eSRod Evans * (which might have been fabricated for this purpose - 2524*08278a5eSRod Evans * see get_cap_group()). The new symbol name is: 2525*08278a5eSRod Evans * 2526*08278a5eSRod Evans * <original name>%<capability group identifier> 2527*08278a5eSRod Evans * 2528*08278a5eSRod Evans * This symbol is associated to the same location, and 2529*08278a5eSRod Evans * becomes a capabilities family member. 2530*08278a5eSRod Evans */ 2531*08278a5eSRod Evans /* LINTED */ 2532*08278a5eSRod Evans hash = (Word)elf_hash(name); 2533*08278a5eSRod Evans 2534*08278a5eSRod Evans ntype = ELF_ST_TYPE(nsym->st_info); 2535*08278a5eSRod Evans if (cdp && (nsym->st_shndx != SHN_UNDEF) && 2536*08278a5eSRod Evans ((sdflags & FLG_SY_SPECSEC) == 0) && 2537*08278a5eSRod Evans ((ntype == STT_FUNC) || (ntype == STT_OBJECT))) { 2538*08278a5eSRod Evans /* 2539*08278a5eSRod Evans * Determine this symbol's visibility. If a mapfile has 2540*08278a5eSRod Evans * indicated this symbol should be local, then there's 2541*08278a5eSRod Evans * no point in transforming this global symbol to a 2542*08278a5eSRod Evans * capabilities symbol. Otherwise, create a symbol 2543*08278a5eSRod Evans * capability pair descriptor to record this symbol as 2544*08278a5eSRod Evans * a candidate for translation. 2545*08278a5eSRod Evans */ 2546*08278a5eSRod Evans if (sym_cap_vis(name, hash, sym, ofl) && 2547*08278a5eSRod Evans ((cpp = alist_append(&cappairs, NULL, 2548*08278a5eSRod Evans sizeof (Cap_pair), AL_CNT_CAP_PAIRS)) == NULL)) 2549*08278a5eSRod Evans return (S_ERROR); 2550*08278a5eSRod Evans } 2551*08278a5eSRod Evans 2552*08278a5eSRod Evans if (cpp) { 2553*08278a5eSRod Evans Sym *rsym; 2554*08278a5eSRod Evans 2555*08278a5eSRod Evans DBG_CALL(Dbg_syms_cap_convert(ofl, ndx, name, nsym)); 2556*08278a5eSRod Evans 2557*08278a5eSRod Evans /* 2558*08278a5eSRod Evans * Allocate a new symbol descriptor to represent the 2559*08278a5eSRod Evans * transformed global symbol. The descriptor points 2560*08278a5eSRod Evans * to the original symbol information (which might 2561*08278a5eSRod Evans * indicate a global or weak visibility). The symbol 2562*08278a5eSRod Evans * information will be transformed into a local symbol 2563*08278a5eSRod Evans * later, after any weak aliases are culled. 2564*08278a5eSRod Evans */ 2565*08278a5eSRod Evans if ((cpp->c_osdp = 2566*08278a5eSRod Evans libld_malloc(sizeof (Sym_desc))) == NULL) 2567*08278a5eSRod Evans return (S_ERROR); 2568*08278a5eSRod Evans 2569*08278a5eSRod Evans cpp->c_osdp->sd_name = name; 2570*08278a5eSRod Evans cpp->c_osdp->sd_sym = nsym; 2571*08278a5eSRod Evans cpp->c_osdp->sd_shndx = shndx; 2572*08278a5eSRod Evans cpp->c_osdp->sd_file = ifl; 2573*08278a5eSRod Evans cpp->c_osdp->sd_isc = ifl->ifl_isdesc[shndx]; 2574*08278a5eSRod Evans cpp->c_osdp->sd_ref = REF_REL_NEED; 2575*08278a5eSRod Evans 2576*08278a5eSRod Evans /* 2577*08278a5eSRod Evans * Save the capabilities group this symbol belongs to, 2578*08278a5eSRod Evans * and the original symbol index. 2579*08278a5eSRod Evans */ 2580*08278a5eSRod Evans cpp->c_group = cdp->ca_groups->apl_data[0]; 2581*08278a5eSRod Evans cpp->c_ndx = ndx; 2582*08278a5eSRod Evans 2583*08278a5eSRod Evans /* 2584*08278a5eSRod Evans * Replace the original symbol definition with a symbol 2585*08278a5eSRod Evans * reference. Make sure this reference isn't left as a 2586*08278a5eSRod Evans * weak. 2587*08278a5eSRod Evans */ 2588*08278a5eSRod Evans if ((rsym = libld_malloc(sizeof (Sym))) == NULL) 2589*08278a5eSRod Evans return (S_ERROR); 2590*08278a5eSRod Evans 2591*08278a5eSRod Evans *rsym = *nsym; 2592*08278a5eSRod Evans 2593*08278a5eSRod Evans rsym->st_info = ELF_ST_INFO(STB_GLOBAL, ntype); 2594*08278a5eSRod Evans rsym->st_shndx = shndx = SHN_UNDEF; 2595*08278a5eSRod Evans rsym->st_value = 0; 2596*08278a5eSRod Evans rsym->st_size = 0; 2597*08278a5eSRod Evans 2598*08278a5eSRod Evans sdflags |= FLG_SY_CAP; 2599*08278a5eSRod Evans 2600*08278a5eSRod Evans nsym = rsym; 2601*08278a5eSRod Evans } 2602*08278a5eSRod Evans 26037c478bd9Sstevel@tonic-gate /* 26047c478bd9Sstevel@tonic-gate * If the symbol does not already exist in the internal symbol 26057c478bd9Sstevel@tonic-gate * table add it, otherwise resolve the conflict. If the symbol 26067c478bd9Sstevel@tonic-gate * from this file is kept, retain its symbol table index for 26077c478bd9Sstevel@tonic-gate * possible use in associating a global alias. 26087c478bd9Sstevel@tonic-gate */ 26095aefb655Srie if ((sdp = ld_sym_find(name, hash, &where, ofl)) == NULL) { 26105aefb655Srie DBG_CALL(Dbg_syms_global(ofl->ofl_lml, ndx, name)); 2611635216b6SRod Evans if ((sdp = ld_sym_enter(name, nsym, hash, ifl, ofl, ndx, 2612635216b6SRod Evans shndx, sdflags, &where)) == (Sym_desc *)S_ERROR) 26137c478bd9Sstevel@tonic-gate return (S_ERROR); 26147c478bd9Sstevel@tonic-gate 2615635216b6SRod Evans } else if (ld_sym_resolve(sdp, nsym, ifl, ofl, ndx, shndx, 26167c478bd9Sstevel@tonic-gate sdflags) == S_ERROR) 26177c478bd9Sstevel@tonic-gate return (S_ERROR); 26187c478bd9Sstevel@tonic-gate 2619*08278a5eSRod Evans /* 2620*08278a5eSRod Evans * Now that we have a symbol descriptor, retain the descriptor 2621*08278a5eSRod Evans * for later use by symbol capabilities processing. 2622*08278a5eSRod Evans */ 2623*08278a5eSRod Evans if (cpp) 2624*08278a5eSRod Evans cpp->c_nsdp = sdp; 2625*08278a5eSRod Evans 26267c478bd9Sstevel@tonic-gate /* 26277c478bd9Sstevel@tonic-gate * After we've compared a defined symbol in one shared 26287c478bd9Sstevel@tonic-gate * object, flag the symbol so we don't compare it again. 26297c478bd9Sstevel@tonic-gate */ 2630635216b6SRod Evans if ((etype == ET_DYN) && (nsym->st_shndx != SHN_UNDEF) && 26317c478bd9Sstevel@tonic-gate ((sdp->sd_flags & FLG_SY_SOFOUND) == 0)) 26327c478bd9Sstevel@tonic-gate sdp->sd_flags |= FLG_SY_SOFOUND; 26337c478bd9Sstevel@tonic-gate 26347c478bd9Sstevel@tonic-gate /* 26357c478bd9Sstevel@tonic-gate * If the symbol is accepted from this file retain the symbol 26367c478bd9Sstevel@tonic-gate * index for possible use in aliasing. 26377c478bd9Sstevel@tonic-gate */ 26387c478bd9Sstevel@tonic-gate if (sdp->sd_file == ifl) 26397c478bd9Sstevel@tonic-gate sdp->sd_symndx = ndx; 26407c478bd9Sstevel@tonic-gate 26417c478bd9Sstevel@tonic-gate ifl->ifl_oldndx[ndx] = sdp; 26427c478bd9Sstevel@tonic-gate 26437c478bd9Sstevel@tonic-gate /* 26447c478bd9Sstevel@tonic-gate * If we've accepted a register symbol, continue to validate 26457c478bd9Sstevel@tonic-gate * it. 26467c478bd9Sstevel@tonic-gate */ 26477c478bd9Sstevel@tonic-gate if (sdp->sd_flags & FLG_SY_REGSYM) { 26487c478bd9Sstevel@tonic-gate Sym_desc *rsdp; 26497c478bd9Sstevel@tonic-gate 2650ba2be530Sab /* 2651ba2be530Sab * The presence of FLG_SY_REGSYM means that 2652ba2be530Sab * the pointers in ld_targ.t_ms are non-NULL. 2653ba2be530Sab */ 2654ba2be530Sab rsdp = (*ld_targ.t_ms.ms_reg_find)(sdp->sd_sym, ofl); 26556b3ba5bdSAli Bahrami if (rsdp == NULL) { 2656ba2be530Sab if ((*ld_targ.t_ms.ms_reg_enter)(sdp, ofl) == 0) 26577c478bd9Sstevel@tonic-gate return (S_ERROR); 26587c478bd9Sstevel@tonic-gate } else if (rsdp != sdp) { 2659ba2be530Sab (void) (*ld_targ.t_ms.ms_reg_check)(rsdp, 2660ba2be530Sab sdp->sd_sym, sdp->sd_name, ifl, ofl); 26617c478bd9Sstevel@tonic-gate } 26627c478bd9Sstevel@tonic-gate } 266375e45495Sab 266475e45495Sab /* 266575e45495Sab * For a relocatable object, if this symbol is defined 266675e45495Sab * and has non-zero length and references an address 266775e45495Sab * within an associated section, then check its extents 266875e45495Sab * to make sure the section boundaries encompass it. 266975e45495Sab * If they don't, the ELF file is corrupt. Note that this 267075e45495Sab * global symbol may have come from another file to satisfy 267175e45495Sab * an UNDEF symbol of the same name from this one. In that 267275e45495Sab * case, we don't check it, because it was already checked 267375e45495Sab * as part of its own file. 267475e45495Sab */ 267575e45495Sab if (etype_rel && (sdp->sd_file == ifl)) { 267675e45495Sab Sym *tsym = sdp->sd_sym; 267775e45495Sab 267875e45495Sab if (SYM_LOC_BADADDR(sdp, tsym, 267975e45495Sab ELF_ST_TYPE(tsym->st_info))) { 268069a0bf0cSab issue_badaddr_msg(ifl, ofl, sdp, 268169a0bf0cSab tsym, tsym->st_shndx); 268275e45495Sab continue; 268375e45495Sab } 268475e45495Sab } 26857c478bd9Sstevel@tonic-gate } 26867c478bd9Sstevel@tonic-gate 26877c478bd9Sstevel@tonic-gate /* 26886b3ba5bdSAli Bahrami * Associate weak (alias) symbols to their non-weak counterparts by 2689*08278a5eSRod Evans * scanning the global symbols one more time. 26906b3ba5bdSAli Bahrami * 26916b3ba5bdSAli Bahrami * This association is needed when processing the symbols from a shared 26926b3ba5bdSAli Bahrami * object dependency when a a weak definition satisfies a reference: 26937c478bd9Sstevel@tonic-gate * 26946b3ba5bdSAli Bahrami * - When building a dynamic executable, if a referenced symbol is a 26956b3ba5bdSAli Bahrami * data item, the symbol data is copied to the executables address 26966b3ba5bdSAli Bahrami * space. In this copy-relocation case, we must also reassociate 26976b3ba5bdSAli Bahrami * the alias symbol with its new location in the executable. 26987c478bd9Sstevel@tonic-gate * 26996b3ba5bdSAli Bahrami * - If the referenced symbol is a function then we may need to 27006b3ba5bdSAli Bahrami * promote the symbols binding from undefined weak to undefined, 27016b3ba5bdSAli Bahrami * otherwise the run-time linker will not generate the correct 27026b3ba5bdSAli Bahrami * relocation error should the symbol not be found. 27036b3ba5bdSAli Bahrami * 27046b3ba5bdSAli Bahrami * Weak alias association is also required when a local dynsym table 27056b3ba5bdSAli Bahrami * is being created. This table should only contain one instance of a 27066b3ba5bdSAli Bahrami * symbol that is associated to a given address. 27077c478bd9Sstevel@tonic-gate * 27087c478bd9Sstevel@tonic-gate * The true association between a weak/strong symbol pair is that both 27096b3ba5bdSAli Bahrami * symbol entries are identical, thus first we create a sorted symbol 27106b3ba5bdSAli Bahrami * list keyed off of the symbols section index and value. If the symbol 27116b3ba5bdSAli Bahrami * belongs to the same section and has the same value, then the chances 27126b3ba5bdSAli Bahrami * are that the rest of the symbols data is the same. This list is then 27136b3ba5bdSAli Bahrami * scanned for weak symbols, and if one is found then any strong 27146b3ba5bdSAli Bahrami * association will exist in the entries that follow. Thus we just have 27156b3ba5bdSAli Bahrami * to scan one (typically a single alias) or more (in the uncommon 27166b3ba5bdSAli Bahrami * instance of multiple weak to strong associations) entries to 27176b3ba5bdSAli Bahrami * determine if a match exists. 27187c478bd9Sstevel@tonic-gate */ 27196b3ba5bdSAli Bahrami if (weak && (OFL_ALLOW_LDYNSYM(ofl) || (etype == ET_DYN)) && 2720d579eb63Sab (total > local)) { 27216b3ba5bdSAli Bahrami static Sym_desc **sort; 27226b3ba5bdSAli Bahrami static size_t osize = 0; 27236b3ba5bdSAli Bahrami size_t nsize = (total - local) * sizeof (Sym_desc *); 27247c478bd9Sstevel@tonic-gate 27256b3ba5bdSAli Bahrami /* 27266b3ba5bdSAli Bahrami * As we might be processing many input files, and many symbols, 27276b3ba5bdSAli Bahrami * try and reuse a static sort buffer. Note, presently we're 27286b3ba5bdSAli Bahrami * playing the game of never freeing any buffers as there's a 27296b3ba5bdSAli Bahrami * belief this wastes time. 27306b3ba5bdSAli Bahrami */ 27316b3ba5bdSAli Bahrami if ((osize == 0) || (nsize > osize)) { 27326b3ba5bdSAli Bahrami if ((sort = libld_malloc(nsize)) == NULL) 27336b3ba5bdSAli Bahrami return (S_ERROR); 27346b3ba5bdSAli Bahrami osize = nsize; 27356b3ba5bdSAli Bahrami } 27366b3ba5bdSAli Bahrami (void) memcpy((void *)sort, &ifl->ifl_oldndx[local], nsize); 27377c478bd9Sstevel@tonic-gate 27387c478bd9Sstevel@tonic-gate qsort(sort, (total - local), sizeof (Sym_desc *), compare); 27397c478bd9Sstevel@tonic-gate 27407c478bd9Sstevel@tonic-gate for (ndx = 0; ndx < (total - local); ndx++) { 27416b3ba5bdSAli Bahrami Sym_desc *wsdp = sort[ndx]; 27426b3ba5bdSAli Bahrami Sym *wsym; 27437c478bd9Sstevel@tonic-gate int sndx; 27447c478bd9Sstevel@tonic-gate 27456b3ba5bdSAli Bahrami /* 27466b3ba5bdSAli Bahrami * Ignore any empty symbol descriptor, or the case where 27476b3ba5bdSAli Bahrami * the symbol has been resolved to a different file. 27486b3ba5bdSAli Bahrami */ 27496b3ba5bdSAli Bahrami if ((wsdp == NULL) || (wsdp->sd_file != ifl)) 27507c478bd9Sstevel@tonic-gate continue; 27517c478bd9Sstevel@tonic-gate 27527c478bd9Sstevel@tonic-gate wsym = wsdp->sd_sym; 27537c478bd9Sstevel@tonic-gate 27546b3ba5bdSAli Bahrami if ((wsym->st_shndx == SHN_UNDEF) || 27556b3ba5bdSAli Bahrami (wsdp->sd_flags & FLG_SY_SPECSEC) || 27566b3ba5bdSAli Bahrami (ELF_ST_BIND(wsym->st_info) != STB_WEAK)) 27577c478bd9Sstevel@tonic-gate continue; 27587c478bd9Sstevel@tonic-gate 27597c478bd9Sstevel@tonic-gate /* 27607c478bd9Sstevel@tonic-gate * We have a weak symbol, if it has a strong alias it 27617c478bd9Sstevel@tonic-gate * will have been sorted to one of the following sort 27627c478bd9Sstevel@tonic-gate * table entries. Note that we could have multiple weak 27637c478bd9Sstevel@tonic-gate * symbols aliased to one strong (if this occurs then 27647c478bd9Sstevel@tonic-gate * the strong symbol only maintains one alias back to 27657c478bd9Sstevel@tonic-gate * the last weak). 27667c478bd9Sstevel@tonic-gate */ 27677c478bd9Sstevel@tonic-gate for (sndx = ndx + 1; sndx < (total - local); sndx++) { 27686b3ba5bdSAli Bahrami Sym_desc *ssdp = sort[sndx]; 27696b3ba5bdSAli Bahrami Sym *ssym; 2770635216b6SRod Evans sd_flag_t w_dynbits, s_dynbits; 27717c478bd9Sstevel@tonic-gate 27726b3ba5bdSAli Bahrami /* 27736b3ba5bdSAli Bahrami * Ignore any empty symbol descriptor, or the 27746b3ba5bdSAli Bahrami * case where the symbol has been resolved to a 27756b3ba5bdSAli Bahrami * different file. 27766b3ba5bdSAli Bahrami */ 27776b3ba5bdSAli Bahrami if ((ssdp == NULL) || (ssdp->sd_file != ifl)) 27786b3ba5bdSAli Bahrami continue; 27797c478bd9Sstevel@tonic-gate 27807c478bd9Sstevel@tonic-gate ssym = ssdp->sd_sym; 27817c478bd9Sstevel@tonic-gate 27826b3ba5bdSAli Bahrami if (ssym->st_shndx == SHN_UNDEF) 27836b3ba5bdSAli Bahrami continue; 27846b3ba5bdSAli Bahrami 27856b3ba5bdSAli Bahrami if ((ssym->st_shndx != wsym->st_shndx) || 27866b3ba5bdSAli Bahrami (ssym->st_value != wsym->st_value)) 27877c478bd9Sstevel@tonic-gate break; 27887c478bd9Sstevel@tonic-gate 27896b3ba5bdSAli Bahrami if ((ssym->st_size != wsym->st_size) || 27906b3ba5bdSAli Bahrami (ssdp->sd_flags & FLG_SY_SPECSEC) || 27916b3ba5bdSAli Bahrami (ELF_ST_BIND(ssym->st_info) == STB_WEAK)) 27926b3ba5bdSAli Bahrami continue; 2793d579eb63Sab 27946b3ba5bdSAli Bahrami /* 27956b3ba5bdSAli Bahrami * If a sharable object, set link fields so 27966b3ba5bdSAli Bahrami * that they reference each other.` 27976b3ba5bdSAli Bahrami */ 27986b3ba5bdSAli Bahrami if (etype == ET_DYN) { 27996b3ba5bdSAli Bahrami ssdp->sd_aux->sa_linkndx = 28006b3ba5bdSAli Bahrami (Word)wsdp->sd_symndx; 28016b3ba5bdSAli Bahrami wsdp->sd_aux->sa_linkndx = 28026b3ba5bdSAli Bahrami (Word)ssdp->sd_symndx; 28036b3ba5bdSAli Bahrami } 28046b3ba5bdSAli Bahrami 28056b3ba5bdSAli Bahrami /* 28066b3ba5bdSAli Bahrami * Determine which of these two symbols go into 28076b3ba5bdSAli Bahrami * the sort section. If a mapfile has made 28086b3ba5bdSAli Bahrami * explicit settings of the FLG_SY_*DYNSORT 28096b3ba5bdSAli Bahrami * flags for both symbols, then we do what they 28106b3ba5bdSAli Bahrami * say. If one has the DYNSORT flags set, we 28116b3ba5bdSAli Bahrami * set the NODYNSORT bit in the other. And if 28126b3ba5bdSAli Bahrami * neither has an explicit setting, then we 28136b3ba5bdSAli Bahrami * favor the weak symbol because they usually 28146b3ba5bdSAli Bahrami * lack the leading underscore. 28156b3ba5bdSAli Bahrami */ 28166b3ba5bdSAli Bahrami w_dynbits = wsdp->sd_flags & 28176b3ba5bdSAli Bahrami (FLG_SY_DYNSORT | FLG_SY_NODYNSORT); 28186b3ba5bdSAli Bahrami s_dynbits = ssdp->sd_flags & 28196b3ba5bdSAli Bahrami (FLG_SY_DYNSORT | FLG_SY_NODYNSORT); 28206b3ba5bdSAli Bahrami if (!(w_dynbits && s_dynbits)) { 28216b3ba5bdSAli Bahrami if (s_dynbits) { 28226b3ba5bdSAli Bahrami if (s_dynbits == FLG_SY_DYNSORT) 282333eb6ee1Sab wsdp->sd_flags |= 282433eb6ee1Sab FLG_SY_NODYNSORT; 28256b3ba5bdSAli Bahrami } else if (w_dynbits != 28266b3ba5bdSAli Bahrami FLG_SY_NODYNSORT) { 28276b3ba5bdSAli Bahrami ssdp->sd_flags |= 28286b3ba5bdSAli Bahrami FLG_SY_NODYNSORT; 2829d579eb63Sab } 28307c478bd9Sstevel@tonic-gate } 28316b3ba5bdSAli Bahrami break; 28327c478bd9Sstevel@tonic-gate } 28337c478bd9Sstevel@tonic-gate } 28347c478bd9Sstevel@tonic-gate } 2835*08278a5eSRod Evans 2836*08278a5eSRod Evans /* 2837*08278a5eSRod Evans * Having processed all symbols, under -z symbolcap, reprocess any 2838*08278a5eSRod Evans * symbols that are being translated from global to locals. The symbol 2839*08278a5eSRod Evans * pair that has been collected defines the original symbol (c_osdp), 2840*08278a5eSRod Evans * which will become a local, and the new symbol (c_nsdp), which will 2841*08278a5eSRod Evans * become a reference (UNDEF) for the original. 2842*08278a5eSRod Evans * 2843*08278a5eSRod Evans * Scan these symbol pairs looking for weak symbols, which have non-weak 2844*08278a5eSRod Evans * aliases. There is no need to translate both of these symbols to 2845*08278a5eSRod Evans * locals, only the global is necessary. 2846*08278a5eSRod Evans */ 2847*08278a5eSRod Evans if (cappairs) { 2848*08278a5eSRod Evans Aliste idx1; 2849*08278a5eSRod Evans Cap_pair *cpp1; 2850*08278a5eSRod Evans 2851*08278a5eSRod Evans for (ALIST_TRAVERSE(cappairs, idx1, cpp1)) { 2852*08278a5eSRod Evans Sym_desc *sdp1 = cpp1->c_osdp; 2853*08278a5eSRod Evans Sym *sym1 = sdp1->sd_sym; 2854*08278a5eSRod Evans uchar_t bind1 = ELF_ST_BIND(sym1->st_info); 2855*08278a5eSRod Evans Aliste idx2; 2856*08278a5eSRod Evans Cap_pair *cpp2; 2857*08278a5eSRod Evans 2858*08278a5eSRod Evans /* 2859*08278a5eSRod Evans * If this symbol isn't weak, it's capability member is 2860*08278a5eSRod Evans * retained for the creation of a local symbol. 2861*08278a5eSRod Evans */ 2862*08278a5eSRod Evans if (bind1 != STB_WEAK) 2863*08278a5eSRod Evans continue; 2864*08278a5eSRod Evans 2865*08278a5eSRod Evans /* 2866*08278a5eSRod Evans * If this is a weak symbol, traverse the capabilities 2867*08278a5eSRod Evans * list again to determine if a corresponding non-weak 2868*08278a5eSRod Evans * symbol exists. 2869*08278a5eSRod Evans */ 2870*08278a5eSRod Evans for (ALIST_TRAVERSE(cappairs, idx2, cpp2)) { 2871*08278a5eSRod Evans Sym_desc *sdp2 = cpp2->c_osdp; 2872*08278a5eSRod Evans Sym *sym2 = sdp2->sd_sym; 2873*08278a5eSRod Evans uchar_t bind2 = 2874*08278a5eSRod Evans ELF_ST_BIND(sym2->st_info); 2875*08278a5eSRod Evans 2876*08278a5eSRod Evans if ((cpp1 == cpp2) || 2877*08278a5eSRod Evans (cpp1->c_group != cpp2->c_group) || 2878*08278a5eSRod Evans (sym1->st_value != sym2->st_value) || 2879*08278a5eSRod Evans (bind2 == STB_WEAK)) 2880*08278a5eSRod Evans continue; 2881*08278a5eSRod Evans 2882*08278a5eSRod Evans /* 2883*08278a5eSRod Evans * The weak symbol (sym1) has a non-weak (sym2) 2884*08278a5eSRod Evans * counterpart. There's no point in translating 2885*08278a5eSRod Evans * both of these equivalent symbols to locals. 2886*08278a5eSRod Evans * Add this symbol capability alias to the 2887*08278a5eSRod Evans * capabilities family information, and remove 2888*08278a5eSRod Evans * the weak symbol. 2889*08278a5eSRod Evans */ 2890*08278a5eSRod Evans if (ld_cap_add_family(ofl, cpp2->c_nsdp, 2891*08278a5eSRod Evans cpp1->c_nsdp, NULL, NULL) == S_ERROR) 2892*08278a5eSRod Evans return (S_ERROR); 2893*08278a5eSRod Evans 2894*08278a5eSRod Evans free((void *)cpp1->c_osdp); 2895*08278a5eSRod Evans (void) alist_delete(cappairs, &idx1); 2896*08278a5eSRod Evans } 2897*08278a5eSRod Evans } 2898*08278a5eSRod Evans 2899*08278a5eSRod Evans DBG_CALL(Dbg_util_nl(ofl->ofl_lml, DBG_NL_STD)); 2900*08278a5eSRod Evans 2901*08278a5eSRod Evans /* 2902*08278a5eSRod Evans * The capability pairs information now represents all the 2903*08278a5eSRod Evans * global symbols that need transforming to locals. These 2904*08278a5eSRod Evans * local symbols are renamed using their group identifiers. 2905*08278a5eSRod Evans */ 2906*08278a5eSRod Evans for (ALIST_TRAVERSE(cappairs, idx1, cpp1)) { 2907*08278a5eSRod Evans Sym_desc *osdp = cpp1->c_osdp; 2908*08278a5eSRod Evans Objcapset *capset; 2909*08278a5eSRod Evans size_t nsize, tsize; 2910*08278a5eSRod Evans const char *oname; 2911*08278a5eSRod Evans char *cname, *idstr; 2912*08278a5eSRod Evans Sym *csym; 2913*08278a5eSRod Evans 2914*08278a5eSRod Evans /* 2915*08278a5eSRod Evans * If the local symbol has not yet been translated 2916*08278a5eSRod Evans * convert it to a local symbol with a name. 2917*08278a5eSRod Evans */ 2918*08278a5eSRod Evans if ((osdp->sd_flags & FLG_SY_CAP) != 0) 2919*08278a5eSRod Evans continue; 2920*08278a5eSRod Evans 2921*08278a5eSRod Evans /* 2922*08278a5eSRod Evans * As we're converting object capabilities to symbol 2923*08278a5eSRod Evans * capabilities, obtain the capabilities set for this 2924*08278a5eSRod Evans * object, so as to retrieve the CA_SUNW_ID value. 2925*08278a5eSRod Evans */ 2926*08278a5eSRod Evans capset = &cpp1->c_group->cg_set; 2927*08278a5eSRod Evans 2928*08278a5eSRod Evans /* 2929*08278a5eSRod Evans * Create a new name from the existing symbol and the 2930*08278a5eSRod Evans * capabilities group identifier. Note, the delimiter 2931*08278a5eSRod Evans * between the symbol name and identifier name is hard- 2932*08278a5eSRod Evans * coded here (%), so that we establish a convention 2933*08278a5eSRod Evans * for transformed symbol names. 2934*08278a5eSRod Evans */ 2935*08278a5eSRod Evans oname = osdp->sd_name; 2936*08278a5eSRod Evans 2937*08278a5eSRod Evans idstr = capset->oc_id.cs_str; 2938*08278a5eSRod Evans nsize = strlen(oname); 2939*08278a5eSRod Evans tsize = nsize + 1 + strlen(idstr) + 1; 2940*08278a5eSRod Evans if ((cname = libld_malloc(tsize)) == 0) 2941*08278a5eSRod Evans return (S_ERROR); 2942*08278a5eSRod Evans 2943*08278a5eSRod Evans (void) strcpy(cname, oname); 2944*08278a5eSRod Evans cname[nsize++] = '%'; 2945*08278a5eSRod Evans (void) strcpy(&cname[nsize], idstr); 2946*08278a5eSRod Evans 2947*08278a5eSRod Evans /* 2948*08278a5eSRod Evans * Allocate a new symbol table entry, transform this 2949*08278a5eSRod Evans * symbol to a local, and assign the new name. 2950*08278a5eSRod Evans */ 2951*08278a5eSRod Evans if ((csym = libld_malloc(sizeof (Sym))) == NULL) 2952*08278a5eSRod Evans return (S_ERROR); 2953*08278a5eSRod Evans 2954*08278a5eSRod Evans *csym = *osdp->sd_sym; 2955*08278a5eSRod Evans csym->st_info = ELF_ST_INFO(STB_LOCAL, 2956*08278a5eSRod Evans ELF_ST_TYPE(osdp->sd_sym->st_info)); 2957*08278a5eSRod Evans 2958*08278a5eSRod Evans osdp->sd_name = cname; 2959*08278a5eSRod Evans osdp->sd_sym = csym; 2960*08278a5eSRod Evans osdp->sd_flags = FLG_SY_CAP; 2961*08278a5eSRod Evans 2962*08278a5eSRod Evans /* 2963*08278a5eSRod Evans * Keep track of this new local symbol. As -z symbolcap 2964*08278a5eSRod Evans * can only be used to create a relocatable object, a 2965*08278a5eSRod Evans * dynamic symbol table can't exist. Ensure there is 2966*08278a5eSRod Evans * space reserved in the string table. 2967*08278a5eSRod Evans */ 2968*08278a5eSRod Evans ofl->ofl_caploclcnt++; 2969*08278a5eSRod Evans if (st_insert(ofl->ofl_strtab, cname) == -1) 2970*08278a5eSRod Evans return (S_ERROR); 2971*08278a5eSRod Evans 2972*08278a5eSRod Evans DBG_CALL(Dbg_syms_cap_local(ofl, cpp1->c_ndx, 2973*08278a5eSRod Evans cname, csym, osdp)); 2974*08278a5eSRod Evans 2975*08278a5eSRod Evans /* 2976*08278a5eSRod Evans * Establish this capability pair as a family. 2977*08278a5eSRod Evans */ 2978*08278a5eSRod Evans if (ld_cap_add_family(ofl, cpp1->c_nsdp, osdp, 2979*08278a5eSRod Evans cpp1->c_group, &ifl->ifl_caps->ca_syms) == S_ERROR) 2980*08278a5eSRod Evans return (S_ERROR); 2981*08278a5eSRod Evans } 2982*08278a5eSRod Evans } 2983*08278a5eSRod Evans 29847c478bd9Sstevel@tonic-gate return (1); 298575e45495Sab 298675e45495Sab #undef SYM_LOC_BADADDR 29877c478bd9Sstevel@tonic-gate } 29887c478bd9Sstevel@tonic-gate 29897c478bd9Sstevel@tonic-gate /* 2990f5a18a30Srie * Add an undefined symbol to the symbol table. The reference originates from 2991*08278a5eSRod Evans * the location identified by the message id (mid). These references can 2992f5a18a30Srie * originate from command line options such as -e, -u, -initarray, etc. 2993f5a18a30Srie * (identified with MSG_INTL(MSG_STR_COMMAND)), or from internally generated 2994f5a18a30Srie * TLS relocation references (identified with MSG_INTL(MSG_STR_TLSREL)). 29957c478bd9Sstevel@tonic-gate */ 29967c478bd9Sstevel@tonic-gate Sym_desc * 2997f5a18a30Srie ld_sym_add_u(const char *name, Ofl_desc *ofl, Msg mid) 29987c478bd9Sstevel@tonic-gate { 29997c478bd9Sstevel@tonic-gate Sym *sym; 30006b3ba5bdSAli Bahrami Ifl_desc *ifl = NULL, *_ifl; 30017c478bd9Sstevel@tonic-gate Sym_desc *sdp; 30027c478bd9Sstevel@tonic-gate Word hash; 300357ef7aa9SRod Evans Aliste idx; 30047c478bd9Sstevel@tonic-gate avl_index_t where; 3005f5a18a30Srie const char *reference = MSG_INTL(mid); 30067c478bd9Sstevel@tonic-gate 30077c478bd9Sstevel@tonic-gate /* 3008b02637afSrie * As an optimization, determine whether we've already generated this 3009b02637afSrie * reference. If the symbol doesn't already exist we'll create it. 3010b02637afSrie * Or if the symbol does exist from a different source, we'll resolve 3011b02637afSrie * the conflict. 30127c478bd9Sstevel@tonic-gate */ 30137c478bd9Sstevel@tonic-gate /* LINTED */ 30147c478bd9Sstevel@tonic-gate hash = (Word)elf_hash(name); 3015b02637afSrie if ((sdp = ld_sym_find(name, hash, &where, ofl)) != NULL) { 3016b02637afSrie if ((sdp->sd_sym->st_shndx == SHN_UNDEF) && 3017b02637afSrie (sdp->sd_file->ifl_name == reference)) 3018b02637afSrie return (sdp); 30197c478bd9Sstevel@tonic-gate } 30207c478bd9Sstevel@tonic-gate 30217c478bd9Sstevel@tonic-gate /* 30227c478bd9Sstevel@tonic-gate * Determine whether a pseudo input file descriptor exists to represent 30237c478bd9Sstevel@tonic-gate * the command line, as any global symbol needs an input file descriptor 30247c478bd9Sstevel@tonic-gate * during any symbol resolution (refer to map_ifl() which provides a 30257c478bd9Sstevel@tonic-gate * similar method for adding symbols from mapfiles). 30267c478bd9Sstevel@tonic-gate */ 302757ef7aa9SRod Evans for (APLIST_TRAVERSE(ofl->ofl_objs, idx, _ifl)) 3028f5a18a30Srie if (strcmp(_ifl->ifl_name, reference) == 0) { 30297c478bd9Sstevel@tonic-gate ifl = _ifl; 30307c478bd9Sstevel@tonic-gate break; 30317c478bd9Sstevel@tonic-gate } 30327c478bd9Sstevel@tonic-gate 30337c478bd9Sstevel@tonic-gate /* 30347c478bd9Sstevel@tonic-gate * If no descriptor exists create one. 30357c478bd9Sstevel@tonic-gate */ 30366b3ba5bdSAli Bahrami if (ifl == NULL) { 303757ef7aa9SRod Evans if ((ifl = libld_calloc(sizeof (Ifl_desc), 1)) == NULL) 30387c478bd9Sstevel@tonic-gate return ((Sym_desc *)S_ERROR); 3039f5a18a30Srie ifl->ifl_name = reference; 30407c478bd9Sstevel@tonic-gate ifl->ifl_flags = FLG_IF_NEEDED | FLG_IF_FILEREF; 304157ef7aa9SRod Evans if ((ifl->ifl_ehdr = libld_calloc(sizeof (Ehdr), 1)) == NULL) 30427c478bd9Sstevel@tonic-gate return ((Sym_desc *)S_ERROR); 30437c478bd9Sstevel@tonic-gate ifl->ifl_ehdr->e_type = ET_REL; 30447c478bd9Sstevel@tonic-gate 304557ef7aa9SRod Evans if (aplist_append(&ofl->ofl_objs, ifl, AL_CNT_OFL_OBJS) == NULL) 30467c478bd9Sstevel@tonic-gate return ((Sym_desc *)S_ERROR); 30477c478bd9Sstevel@tonic-gate } 30487c478bd9Sstevel@tonic-gate 30497c478bd9Sstevel@tonic-gate /* 30507c478bd9Sstevel@tonic-gate * Allocate a symbol structure and add it to the global symbol table. 30517c478bd9Sstevel@tonic-gate */ 30526b3ba5bdSAli Bahrami if ((sym = libld_calloc(sizeof (Sym), 1)) == NULL) 30537c478bd9Sstevel@tonic-gate return ((Sym_desc *)S_ERROR); 30547c478bd9Sstevel@tonic-gate sym->st_info = ELF_ST_INFO(STB_GLOBAL, STT_NOTYPE); 30557c478bd9Sstevel@tonic-gate sym->st_shndx = SHN_UNDEF; 30567c478bd9Sstevel@tonic-gate 30575aefb655Srie DBG_CALL(Dbg_syms_process(ofl->ofl_lml, ifl)); 3058b02637afSrie if (sdp == NULL) { 3059b02637afSrie DBG_CALL(Dbg_syms_global(ofl->ofl_lml, 0, name)); 3060b02637afSrie if ((sdp = ld_sym_enter(name, sym, hash, ifl, ofl, 0, SHN_UNDEF, 3061635216b6SRod Evans 0, &where)) == (Sym_desc *)S_ERROR) 3062b02637afSrie return ((Sym_desc *)S_ERROR); 3063b02637afSrie } else if (ld_sym_resolve(sdp, sym, ifl, ofl, 0, 3064b02637afSrie SHN_UNDEF, 0) == S_ERROR) 3065b02637afSrie return ((Sym_desc *)S_ERROR); 3066b02637afSrie 30677c478bd9Sstevel@tonic-gate sdp->sd_flags &= ~FLG_SY_CLEAN; 30687c478bd9Sstevel@tonic-gate sdp->sd_flags |= FLG_SY_CMDREF; 30697c478bd9Sstevel@tonic-gate 30707c478bd9Sstevel@tonic-gate return (sdp); 30717c478bd9Sstevel@tonic-gate } 30724a8d0ea7SAli Bahrami 30734a8d0ea7SAli Bahrami /* 30744a8d0ea7SAli Bahrami * STT_SECTION symbols have their st_name field set to NULL, and consequently 30754a8d0ea7SAli Bahrami * have no name. Generate a name suitable for diagnostic use for such a symbol. 30764a8d0ea7SAli Bahrami * The resulting name will be of the form: 30774a8d0ea7SAli Bahrami * 30784a8d0ea7SAli Bahrami * "XXX (section)" 30794a8d0ea7SAli Bahrami * 30804a8d0ea7SAli Bahrami * where XXX is the name of the section. 30814a8d0ea7SAli Bahrami * 30824a8d0ea7SAli Bahrami * Diagnostics for STT_SECTION symbols tend to come in clusters, 30834a8d0ea7SAli Bahrami * so we use a static variable to retain the last string we generate. If 30844a8d0ea7SAli Bahrami * another one comes along for the same section before some other section 30854a8d0ea7SAli Bahrami * intervenes, we will reuse the string. 30864a8d0ea7SAli Bahrami * 30874a8d0ea7SAli Bahrami * entry: 3088*08278a5eSRod Evans * isc - Input section associated with the symbol. 30894a8d0ea7SAli Bahrami * fmt - NULL, or format string to use. 30904a8d0ea7SAli Bahrami * 30914a8d0ea7SAli Bahrami * exit: 30924a8d0ea7SAli Bahrami * Returns the allocated string, or NULL on allocation failure. 30934a8d0ea7SAli Bahrami */ 30944a8d0ea7SAli Bahrami const const char * 30954a8d0ea7SAli Bahrami ld_stt_section_sym_name(Is_desc *isp) 30964a8d0ea7SAli Bahrami { 30974a8d0ea7SAli Bahrami static const char *last_fmt; 30984a8d0ea7SAli Bahrami static Is_desc *last_isp = NULL; 30994a8d0ea7SAli Bahrami static char *namestr; 31004a8d0ea7SAli Bahrami 31014a8d0ea7SAli Bahrami const char *fmt; 31024a8d0ea7SAli Bahrami size_t len; 31034a8d0ea7SAli Bahrami 31044a8d0ea7SAli Bahrami if ((isp != NULL) && (isp->is_name != NULL)) { 31054a8d0ea7SAli Bahrami fmt = (isp->is_flags & FLG_IS_GNSTRMRG) ? 31064a8d0ea7SAli Bahrami MSG_INTL(MSG_STR_SECTION_MSTR) : MSG_INTL(MSG_STR_SECTION); 31074a8d0ea7SAli Bahrami 31084a8d0ea7SAli Bahrami if ((last_isp == isp) && (last_fmt == fmt)) 31094a8d0ea7SAli Bahrami return (namestr); 31104a8d0ea7SAli Bahrami 31114a8d0ea7SAli Bahrami len = strlen(fmt) + strlen(isp->is_name) + 1; 31124a8d0ea7SAli Bahrami 31134a8d0ea7SAli Bahrami if ((namestr = libld_malloc(len)) == 0) 31144a8d0ea7SAli Bahrami return (NULL); 31154a8d0ea7SAli Bahrami (void) snprintf(namestr, len, fmt, isp->is_name); 31164a8d0ea7SAli Bahrami 31174a8d0ea7SAli Bahrami /* Remember for next time */ 31184a8d0ea7SAli Bahrami last_fmt = fmt; 31194a8d0ea7SAli Bahrami last_isp = isp; 31204a8d0ea7SAli Bahrami 31214a8d0ea7SAli Bahrami return (namestr); 31224a8d0ea7SAli Bahrami } 31234a8d0ea7SAli Bahrami 31244a8d0ea7SAli Bahrami return (NULL); 31254a8d0ea7SAli Bahrami } 3126