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 * 276b3ba5bdSAli Bahrami * Copyright 2009 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, 79*4a8d0ea7SAli Bahrami int symndx, Word shndx, Word symsecndx, const char *symsecname, 80*4a8d0ea7SAli Bahrami const char *strsecname, Word *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, 88*4a8d0ea7SAli Bahrami EC_WORD(symsecndx), symsecname, symndx, 89*4a8d0ea7SAli 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, 95*4a8d0ea7SAli Bahrami EC_WORD(symsecndx), symsecname, symndx, 96*4a8d0ea7SAli 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), 126*4a8d0ea7SAli Bahrami ifl->ifl_name, EC_WORD(symsecndx), symsecname, symndx, 127*4a8d0ea7SAli 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 */ 2177c478bd9Sstevel@tonic-gate symshdr = ifl->ifl_isdesc[sifshdr->sh_link]->is_shdr; 2187c478bd9Sstevel@tonic-gate symdata = ifl->ifl_isdesc[sifshdr->sh_link]->is_indata->d_buf; 2197c478bd9Sstevel@tonic-gate 2207c478bd9Sstevel@tonic-gate /* 2217c478bd9Sstevel@tonic-gate * Get the string table associated with the symbol table. 2227c478bd9Sstevel@tonic-gate */ 2237c478bd9Sstevel@tonic-gate strdata = ifl->ifl_isdesc[symshdr->sh_link]->is_indata->d_buf; 2247c478bd9Sstevel@tonic-gate 2257c478bd9Sstevel@tonic-gate /* 2267c478bd9Sstevel@tonic-gate * Traverse the syminfo data for symbols that can't be directly 2277c478bd9Sstevel@tonic-gate * bound to. 2287c478bd9Sstevel@tonic-gate */ 2297c478bd9Sstevel@tonic-gate for (_cnt = 1, sifdata++; _cnt < cnt; _cnt++, sifdata++) { 2307c478bd9Sstevel@tonic-gate Sym *sym; 2317c478bd9Sstevel@tonic-gate char *str; 2327c478bd9Sstevel@tonic-gate Sym_desc *sdp; 2337c478bd9Sstevel@tonic-gate 2343c4993fbSrie if ((sifdata->si_flags & SYMINFO_FLG_NOEXTDIRECT) == 0) 2357c478bd9Sstevel@tonic-gate continue; 2367c478bd9Sstevel@tonic-gate 2377c478bd9Sstevel@tonic-gate sym = (Sym *)(symdata + _cnt); 2387c478bd9Sstevel@tonic-gate str = (char *)(strdata + sym->st_name); 2397c478bd9Sstevel@tonic-gate 2405aefb655Srie if (sdp = ld_sym_find(str, SYM_NOHASH, 0, ofl)) { 2417c478bd9Sstevel@tonic-gate if (ifl != sdp->sd_file) 2427c478bd9Sstevel@tonic-gate continue; 2437c478bd9Sstevel@tonic-gate 2447c478bd9Sstevel@tonic-gate sdp->sd_flags1 &= ~FLG_SY1_DIR; 2457c478bd9Sstevel@tonic-gate sdp->sd_flags1 |= FLG_SY1_NDIR; 2467c478bd9Sstevel@tonic-gate } 2477c478bd9Sstevel@tonic-gate } 2487c478bd9Sstevel@tonic-gate return (0); 2497c478bd9Sstevel@tonic-gate } 2507c478bd9Sstevel@tonic-gate 2517c478bd9Sstevel@tonic-gate /* 2527c478bd9Sstevel@tonic-gate * If, during symbol processing, it is necessary to update a local symbols 2537c478bd9Sstevel@tonic-gate * contents before we have generated the symbol tables in the output image, 2547c478bd9Sstevel@tonic-gate * create a new symbol structure and copy the original symbol contents. While 2557c478bd9Sstevel@tonic-gate * we are processing the input files, their local symbols are part of the 2567c478bd9Sstevel@tonic-gate * read-only mapped image. Commonly, these symbols are copied to the new output 2577c478bd9Sstevel@tonic-gate * file image and then updated to reflect their new address and any change in 2587c478bd9Sstevel@tonic-gate * attributes. However, sometimes during relocation counting, it is necessary 2597c478bd9Sstevel@tonic-gate * to adjust the symbols information. This routine provides for the generation 2607c478bd9Sstevel@tonic-gate * of a new symbol image so that this update can be performed. 2617c478bd9Sstevel@tonic-gate * All global symbols are copied to an internal symbol table to improve locality 2627c478bd9Sstevel@tonic-gate * of reference and hence performance, and thus this copying is not necessary. 2637c478bd9Sstevel@tonic-gate */ 2647c478bd9Sstevel@tonic-gate uintptr_t 2655aefb655Srie ld_sym_copy(Sym_desc *sdp) 2667c478bd9Sstevel@tonic-gate { 2677c478bd9Sstevel@tonic-gate Sym *nsym; 2687c478bd9Sstevel@tonic-gate 2697c478bd9Sstevel@tonic-gate if (sdp->sd_flags & FLG_SY_CLEAN) { 2706b3ba5bdSAli Bahrami if ((nsym = libld_malloc(sizeof (Sym))) == NULL) 2717c478bd9Sstevel@tonic-gate return (S_ERROR); 2727c478bd9Sstevel@tonic-gate *nsym = *(sdp->sd_sym); 2737c478bd9Sstevel@tonic-gate sdp->sd_sym = nsym; 2747c478bd9Sstevel@tonic-gate sdp->sd_flags &= ~FLG_SY_CLEAN; 2757c478bd9Sstevel@tonic-gate } 2767c478bd9Sstevel@tonic-gate return (1); 2777c478bd9Sstevel@tonic-gate } 2787c478bd9Sstevel@tonic-gate 2797c478bd9Sstevel@tonic-gate /* 2807c478bd9Sstevel@tonic-gate * Finds a given name in the link editors internal symbol table. If no 2817c478bd9Sstevel@tonic-gate * hash value is specified it is calculated. A pointer to the located 2827c478bd9Sstevel@tonic-gate * Sym_desc entry is returned, or NULL if the symbol is not found. 2837c478bd9Sstevel@tonic-gate */ 2847c478bd9Sstevel@tonic-gate Sym_desc * 2855aefb655Srie ld_sym_find(const char *name, Word hash, avl_index_t *where, Ofl_desc *ofl) 2867c478bd9Sstevel@tonic-gate { 2876b3ba5bdSAli Bahrami Sym_avlnode qsav, *sav; 2887c478bd9Sstevel@tonic-gate 2897c478bd9Sstevel@tonic-gate if (hash == SYM_NOHASH) 2907c478bd9Sstevel@tonic-gate /* LINTED */ 2917c478bd9Sstevel@tonic-gate hash = (Word)elf_hash((const char *)name); 2927c478bd9Sstevel@tonic-gate qsav.sav_hash = hash; 2937c478bd9Sstevel@tonic-gate qsav.sav_name = name; 2947c478bd9Sstevel@tonic-gate 2957c478bd9Sstevel@tonic-gate /* 2967c478bd9Sstevel@tonic-gate * Perform search for symbol in AVL tree. Note that the 'where' field 2977c478bd9Sstevel@tonic-gate * is passed in from the caller. If a 'where' is present, it can be 298a194faf8Srie * used in subsequent 'ld_sym_enter()' calls if required. 2997c478bd9Sstevel@tonic-gate */ 3007c478bd9Sstevel@tonic-gate sav = avl_find(&ofl->ofl_symavl, &qsav, where); 3017c478bd9Sstevel@tonic-gate 3027c478bd9Sstevel@tonic-gate /* 3037c478bd9Sstevel@tonic-gate * If symbol was not found in the avl tree, return null to show that. 3047c478bd9Sstevel@tonic-gate */ 3056b3ba5bdSAli Bahrami if (sav == NULL) 3066b3ba5bdSAli Bahrami return (NULL); 3077c478bd9Sstevel@tonic-gate 3087c478bd9Sstevel@tonic-gate /* 3097c478bd9Sstevel@tonic-gate * Return symbol found. 3107c478bd9Sstevel@tonic-gate */ 3117c478bd9Sstevel@tonic-gate return (sav->sav_symdesc); 3127c478bd9Sstevel@tonic-gate } 3137c478bd9Sstevel@tonic-gate 3147c478bd9Sstevel@tonic-gate /* 3157c478bd9Sstevel@tonic-gate * Enter a new symbol into the link editors internal symbol table. 3167c478bd9Sstevel@tonic-gate * If the symbol is from an input file, information regarding the input file 3177c478bd9Sstevel@tonic-gate * and input section is also recorded. Otherwise (file == NULL) the symbol 3187c478bd9Sstevel@tonic-gate * has been internally generated (ie. _etext, _edata, etc.). 3197c478bd9Sstevel@tonic-gate */ 3207c478bd9Sstevel@tonic-gate Sym_desc * 3215aefb655Srie ld_sym_enter(const char *name, Sym *osym, Word hash, Ifl_desc *ifl, 3225aefb655Srie Ofl_desc *ofl, Word ndx, Word shndx, Word sdflags, Half sdflags1, 3235aefb655Srie avl_index_t *where) 3247c478bd9Sstevel@tonic-gate { 3257c478bd9Sstevel@tonic-gate Sym_desc *sdp; 3267c478bd9Sstevel@tonic-gate Sym_aux *sap; 3277c478bd9Sstevel@tonic-gate Sym_avlnode *savl; 3287c478bd9Sstevel@tonic-gate char *_name; 3297c478bd9Sstevel@tonic-gate Sym *nsym; 3307c478bd9Sstevel@tonic-gate Half etype; 33160758829Srie uchar_t vis; 3327c478bd9Sstevel@tonic-gate avl_index_t _where; 3337c478bd9Sstevel@tonic-gate 3347c478bd9Sstevel@tonic-gate /* 3357c478bd9Sstevel@tonic-gate * Establish the file type. 3367c478bd9Sstevel@tonic-gate */ 3377c478bd9Sstevel@tonic-gate if (ifl) 3387c478bd9Sstevel@tonic-gate etype = ifl->ifl_ehdr->e_type; 3397c478bd9Sstevel@tonic-gate else 3407c478bd9Sstevel@tonic-gate etype = ET_NONE; 3417c478bd9Sstevel@tonic-gate 3427c478bd9Sstevel@tonic-gate ofl->ofl_entercnt++; 3437c478bd9Sstevel@tonic-gate 3447c478bd9Sstevel@tonic-gate /* 3457c478bd9Sstevel@tonic-gate * Allocate a Sym Descriptor, Auxiliary Descriptor, and a Sym AVLNode - 3467c478bd9Sstevel@tonic-gate * contiguously. 3477c478bd9Sstevel@tonic-gate */ 3487c478bd9Sstevel@tonic-gate if ((savl = libld_calloc(sizeof (Sym_avlnode) + sizeof (Sym_desc) + 3496b3ba5bdSAli Bahrami sizeof (Sym_aux), 1)) == NULL) 3507c478bd9Sstevel@tonic-gate return ((Sym_desc *)S_ERROR); 3517c478bd9Sstevel@tonic-gate sdp = (Sym_desc *)((uintptr_t)savl + sizeof (Sym_avlnode)); 3527c478bd9Sstevel@tonic-gate sap = (Sym_aux *)((uintptr_t)sdp + sizeof (Sym_desc)); 3537c478bd9Sstevel@tonic-gate 3547c478bd9Sstevel@tonic-gate savl->sav_symdesc = sdp; 3557c478bd9Sstevel@tonic-gate sdp->sd_file = ifl; 3567c478bd9Sstevel@tonic-gate sdp->sd_aux = sap; 3577c478bd9Sstevel@tonic-gate savl->sav_hash = sap->sa_hash = hash; 3587c478bd9Sstevel@tonic-gate 3597c478bd9Sstevel@tonic-gate /* 3607c478bd9Sstevel@tonic-gate * Copy the symbol table entry from the input file into the internal 3617c478bd9Sstevel@tonic-gate * entry and have the symbol descriptor use it. 3627c478bd9Sstevel@tonic-gate */ 3637c478bd9Sstevel@tonic-gate sdp->sd_sym = nsym = &sap->sa_sym; 3647c478bd9Sstevel@tonic-gate *nsym = *osym; 3657c478bd9Sstevel@tonic-gate sdp->sd_shndx = shndx; 3667c478bd9Sstevel@tonic-gate sdp->sd_flags |= sdflags; 3677c478bd9Sstevel@tonic-gate sdp->sd_flags1 |= sdflags1; 3687c478bd9Sstevel@tonic-gate 3696b3ba5bdSAli Bahrami if ((_name = libld_malloc(strlen(name) + 1)) == NULL) 3707c478bd9Sstevel@tonic-gate return ((Sym_desc *)S_ERROR); 3717c478bd9Sstevel@tonic-gate savl->sav_name = sdp->sd_name = (const char *)strcpy(_name, name); 3727c478bd9Sstevel@tonic-gate 3737c478bd9Sstevel@tonic-gate /* 3747c478bd9Sstevel@tonic-gate * Enter Symbol in AVL tree. 3757c478bd9Sstevel@tonic-gate */ 3767c478bd9Sstevel@tonic-gate if (where == 0) { 3777c478bd9Sstevel@tonic-gate /* LINTED */ 3787c478bd9Sstevel@tonic-gate Sym_avlnode *_savl; 3797c478bd9Sstevel@tonic-gate /* 3805aefb655Srie * If a previous ld_sym_find() hasn't initialized 'where' do it 3817c478bd9Sstevel@tonic-gate * now. 3827c478bd9Sstevel@tonic-gate */ 3837c478bd9Sstevel@tonic-gate where = &_where; 3847c478bd9Sstevel@tonic-gate _savl = avl_find(&ofl->ofl_symavl, savl, where); 3856b3ba5bdSAli Bahrami assert(_savl == NULL); 3867c478bd9Sstevel@tonic-gate } 3877c478bd9Sstevel@tonic-gate avl_insert(&ofl->ofl_symavl, savl, *where); 3887c478bd9Sstevel@tonic-gate 3897c478bd9Sstevel@tonic-gate /* 3907c478bd9Sstevel@tonic-gate * Record the section index. This is possible because the 3917c478bd9Sstevel@tonic-gate * `ifl_isdesc' table is filled before we start symbol processing. 3927c478bd9Sstevel@tonic-gate */ 3930bc07c75Srie if ((sdflags & FLG_SY_SPECSEC) || (nsym->st_shndx == SHN_UNDEF)) 3947c478bd9Sstevel@tonic-gate sdp->sd_isc = NULL; 3957c478bd9Sstevel@tonic-gate else { 3967c478bd9Sstevel@tonic-gate sdp->sd_isc = ifl->ifl_isdesc[shndx]; 3977c478bd9Sstevel@tonic-gate 3987c478bd9Sstevel@tonic-gate /* 3997c478bd9Sstevel@tonic-gate * If this symbol is from a relocatable object, make sure that 4007c478bd9Sstevel@tonic-gate * it is still associated with a section. For example, an 4017c478bd9Sstevel@tonic-gate * unknown section type (SHT_NULL) would have been rejected on 4027c478bd9Sstevel@tonic-gate * input with a warning. Here, we make the use of the symbol 4037c478bd9Sstevel@tonic-gate * fatal. A symbol descriptor is still returned, so that the 4047c478bd9Sstevel@tonic-gate * caller can continue processing all symbols, and hence flush 4057c478bd9Sstevel@tonic-gate * out as many error conditions as possible. 4067c478bd9Sstevel@tonic-gate */ 4076b3ba5bdSAli Bahrami if ((etype == ET_REL) && (sdp->sd_isc == NULL)) { 4085aefb655Srie eprintf(ofl->ofl_lml, ERR_FATAL, 4095aefb655Srie MSG_INTL(MSG_SYM_INVSEC), name, ifl->ifl_name, 4105aefb655Srie EC_XWORD(shndx)); 4117c478bd9Sstevel@tonic-gate ofl->ofl_flags |= FLG_OF_FATAL; 4127c478bd9Sstevel@tonic-gate return (sdp); 4137c478bd9Sstevel@tonic-gate } 4147c478bd9Sstevel@tonic-gate } 4157c478bd9Sstevel@tonic-gate 4167c478bd9Sstevel@tonic-gate /* 4177c478bd9Sstevel@tonic-gate * Mark any COMMON symbols as 'tentative'. 4187c478bd9Sstevel@tonic-gate */ 41954d82594Sseizo if (sdflags & FLG_SY_SPECSEC) { 4200bc07c75Srie if (nsym->st_shndx == SHN_COMMON) 42154d82594Sseizo sdp->sd_flags |= FLG_SY_TENTSYM; 422ba2be530Sab #if defined(_ELF64) 423ba2be530Sab else if ((ld_targ.t_m.m_mach == EM_AMD64) && 424ba2be530Sab (nsym->st_shndx == SHN_X86_64_LCOMMON)) 42554d82594Sseizo sdp->sd_flags |= FLG_SY_TENTSYM; 42654d82594Sseizo #endif 42754d82594Sseizo } 4287c478bd9Sstevel@tonic-gate 4297c478bd9Sstevel@tonic-gate /* 43060758829Srie * Establish the symbols visibility and reference. 4317c478bd9Sstevel@tonic-gate */ 43260758829Srie vis = ELF_ST_VISIBILITY(nsym->st_other); 43360758829Srie 4347c478bd9Sstevel@tonic-gate if ((etype == ET_NONE) || (etype == ET_REL)) { 43560758829Srie switch (vis) { 43660758829Srie case STV_DEFAULT: 43760758829Srie sdp->sd_flags1 |= FLG_SY1_DEFAULT; 43860758829Srie break; 43960758829Srie case STV_INTERNAL: 44060758829Srie case STV_HIDDEN: 44160758829Srie sdp->sd_flags1 |= FLG_SY1_HIDDEN; 44260758829Srie break; 44360758829Srie case STV_PROTECTED: 44460758829Srie sdp->sd_flags1 |= FLG_SY1_PROTECT; 44560758829Srie break; 44660758829Srie case STV_EXPORTED: 44760758829Srie sdp->sd_flags1 |= FLG_SY1_EXPORT; 44860758829Srie break; 44960758829Srie case STV_SINGLETON: 45060758829Srie sdp->sd_flags1 |= (FLG_SY1_SINGLE | FLG_SY1_NDIR); 45160758829Srie ofl->ofl_flags1 |= FLG_OF1_NDIRECT; 45260758829Srie break; 45360758829Srie case STV_ELIMINATE: 454d4517e84Srie sdp->sd_flags1 |= (FLG_SY1_HIDDEN | FLG_SY1_ELIM); 45560758829Srie break; 45660758829Srie default: 45760758829Srie assert(vis <= STV_ELIMINATE); 45860758829Srie } 45960758829Srie 4607c478bd9Sstevel@tonic-gate sdp->sd_ref = REF_REL_NEED; 4617c478bd9Sstevel@tonic-gate 4627c478bd9Sstevel@tonic-gate /* 4639a411307Srie * Under -Bnodirect, all exported interfaces that have not 4649a411307Srie * explicitly been defined protected or directly bound to, are 4659a411307Srie * tagged to prevent direct binding. 4667c478bd9Sstevel@tonic-gate */ 4670bc07c75Srie if ((ofl->ofl_flags1 & FLG_OF1_ALNODIR) && 46860758829Srie ((sdp->sd_flags1 & (FLG_SY1_PROTECT | FLG_SY1_DIR)) == 0) && 4699a411307Srie (nsym->st_shndx != SHN_UNDEF)) { 4707c478bd9Sstevel@tonic-gate sdp->sd_flags1 |= FLG_SY1_NDIR; 4719a411307Srie } 4727c478bd9Sstevel@tonic-gate } else { 4737c478bd9Sstevel@tonic-gate sdp->sd_ref = REF_DYN_SEEN; 4747c478bd9Sstevel@tonic-gate 4757c478bd9Sstevel@tonic-gate /* 4767c478bd9Sstevel@tonic-gate * Record the binding file for this symbol in the sa_bindto 4777c478bd9Sstevel@tonic-gate * field. If this symbol is ever overridden by a REF_REL_NEED 4787c478bd9Sstevel@tonic-gate * definition, sa_bindto is used when building a 'translator'. 4797c478bd9Sstevel@tonic-gate */ 4800bc07c75Srie if (nsym->st_shndx != SHN_UNDEF) 4817c478bd9Sstevel@tonic-gate sdp->sd_aux->sa_bindto = ifl; 4827c478bd9Sstevel@tonic-gate 4837c478bd9Sstevel@tonic-gate /* 48460758829Srie * If this is a protected symbol, remember this. Note, this 48560758829Srie * state is different from the FLG_SY1_PROTECT used to establish 48660758829Srie * a symbol definitions visibility. This state is used to warn 48760758829Srie * against possible copy relocations against this referenced 48860758829Srie * symbol. 4897c478bd9Sstevel@tonic-gate */ 49060758829Srie if (vis == STV_PROTECTED) 4917c478bd9Sstevel@tonic-gate sdp->sd_flags |= FLG_SY_PROT; 4927c478bd9Sstevel@tonic-gate 4937c478bd9Sstevel@tonic-gate /* 49460758829Srie * If this is a SINGLETON definition, then indicate the symbol 49560758829Srie * can not be directly bound to, and retain the visibility. 49660758829Srie * This visibility will be inherited by any references made to 49760758829Srie * this symbol. 4987c478bd9Sstevel@tonic-gate */ 49960758829Srie if ((vis == STV_SINGLETON) && (nsym->st_shndx != SHN_UNDEF)) 50060758829Srie sdp->sd_flags1 |= (FLG_SY1_SINGLE | FLG_SY1_NDIR); 5017c478bd9Sstevel@tonic-gate 5027c478bd9Sstevel@tonic-gate /* 50360758829Srie * If the new symbol is from a shared library and is associated 50460758829Srie * with a SHT_NOBITS section then this symbol originated from a 50560758829Srie * tentative symbol. 5067c478bd9Sstevel@tonic-gate */ 5077c478bd9Sstevel@tonic-gate if (sdp->sd_isc && 5087c478bd9Sstevel@tonic-gate (sdp->sd_isc->is_shdr->sh_type == SHT_NOBITS)) 5097c478bd9Sstevel@tonic-gate sdp->sd_flags |= FLG_SY_TENTSYM; 5107c478bd9Sstevel@tonic-gate } 5117c478bd9Sstevel@tonic-gate 5127c478bd9Sstevel@tonic-gate /* 5137c478bd9Sstevel@tonic-gate * Reclassify any SHN_SUNW_IGNORE symbols to SHN_UNDEF so as to 5140bc07c75Srie * simplify future processing. 5157c478bd9Sstevel@tonic-gate */ 5160bc07c75Srie if (nsym->st_shndx == SHN_SUNW_IGNORE) { 5177c478bd9Sstevel@tonic-gate sdp->sd_shndx = shndx = SHN_UNDEF; 5187c478bd9Sstevel@tonic-gate sdp->sd_flags |= FLG_SY_REDUCED; 5197c478bd9Sstevel@tonic-gate sdp->sd_flags1 |= 52060758829Srie (FLG_SY1_HIDDEN | FLG_SY1_IGNORE | FLG_SY1_ELIM); 5217c478bd9Sstevel@tonic-gate } 5227c478bd9Sstevel@tonic-gate 5237c478bd9Sstevel@tonic-gate /* 5247c478bd9Sstevel@tonic-gate * If this is an undefined, or common symbol from a relocatable object 5257c478bd9Sstevel@tonic-gate * determine whether it is a global or weak reference (see build_osym(), 5267c478bd9Sstevel@tonic-gate * where REF_DYN_NEED definitions are returned back to undefines). 5277c478bd9Sstevel@tonic-gate */ 52854d82594Sseizo if ((etype == ET_REL) && 52954d82594Sseizo (ELF_ST_BIND(nsym->st_info) == STB_GLOBAL) && 5300bc07c75Srie ((nsym->st_shndx == SHN_UNDEF) || ((sdflags & FLG_SY_SPECSEC) && 531ba2be530Sab #if defined(_ELF64) 5320bc07c75Srie ((nsym->st_shndx == SHN_COMMON) || 533ba2be530Sab ((ld_targ.t_m.m_mach == EM_AMD64) && 534ba2be530Sab (nsym->st_shndx == SHN_X86_64_LCOMMON)))))) 53554d82594Sseizo #else 53633eb6ee1Sab /* BEGIN CSTYLED */ 5370bc07c75Srie (nsym->st_shndx == SHN_COMMON)))) 53833eb6ee1Sab /* END CSTYLED */ 53954d82594Sseizo #endif 5407c478bd9Sstevel@tonic-gate sdp->sd_flags |= FLG_SY_GLOBREF; 5417c478bd9Sstevel@tonic-gate 5427c478bd9Sstevel@tonic-gate /* 5437c478bd9Sstevel@tonic-gate * Record the input filename on the referenced or defined files list 5447c478bd9Sstevel@tonic-gate * for possible later diagnostics. The `sa_rfile' pointer contains the 5457c478bd9Sstevel@tonic-gate * name of the file that first referenced this symbol and is used to 5467c478bd9Sstevel@tonic-gate * generate undefined symbol diagnostics (refer to sym_undef_entry()). 5477c478bd9Sstevel@tonic-gate * Note that this entry can be overridden if a reference from a 5487c478bd9Sstevel@tonic-gate * relocatable object is found after a reference from a shared object 5497c478bd9Sstevel@tonic-gate * (refer to sym_override()). 5507c478bd9Sstevel@tonic-gate * The `sa_dfiles' list is used to maintain the list of files that 5517c478bd9Sstevel@tonic-gate * define the same symbol. This list can be used for two reasons: 5527c478bd9Sstevel@tonic-gate * 5536b3ba5bdSAli Bahrami * - To save the first definition of a symbol that is not available 5547c478bd9Sstevel@tonic-gate * for this link-edit. 5557c478bd9Sstevel@tonic-gate * 5566b3ba5bdSAli Bahrami * - To save all definitions of a symbol when the -m option is in 5577c478bd9Sstevel@tonic-gate * effect. This is optional as it is used to list multiple 5587c478bd9Sstevel@tonic-gate * (interposed) definitions of a symbol (refer to ldmap_out()), 5597c478bd9Sstevel@tonic-gate * and can be quite expensive. 5607c478bd9Sstevel@tonic-gate */ 5610bc07c75Srie if (nsym->st_shndx == SHN_UNDEF) { 5627c478bd9Sstevel@tonic-gate sap->sa_rfile = ifl->ifl_name; 5637c478bd9Sstevel@tonic-gate } else { 5647c478bd9Sstevel@tonic-gate if (sdp->sd_ref == REF_DYN_SEEN) { 5657c478bd9Sstevel@tonic-gate /* 5667c478bd9Sstevel@tonic-gate * A symbol is determined to be unavailable if it 5677c478bd9Sstevel@tonic-gate * belongs to a version of a shared object that this 5687c478bd9Sstevel@tonic-gate * user does not wish to use, or if it belongs to an 5697c478bd9Sstevel@tonic-gate * implicit shared object. 5707c478bd9Sstevel@tonic-gate */ 5717c478bd9Sstevel@tonic-gate if (ifl->ifl_vercnt) { 5729039eeafSab Ver_index *vip; 5737c478bd9Sstevel@tonic-gate Half vndx = ifl->ifl_versym[ndx]; 5747c478bd9Sstevel@tonic-gate 5757c478bd9Sstevel@tonic-gate sap->sa_dverndx = vndx; 5767c478bd9Sstevel@tonic-gate vip = &ifl->ifl_verndx[vndx]; 5777c478bd9Sstevel@tonic-gate if (!(vip->vi_flags & FLG_VER_AVAIL)) { 5787c478bd9Sstevel@tonic-gate sdp->sd_flags |= FLG_SY_NOTAVAIL; 5797c478bd9Sstevel@tonic-gate sap->sa_vfile = ifl->ifl_name; 5807c478bd9Sstevel@tonic-gate } 5817c478bd9Sstevel@tonic-gate } 5827c478bd9Sstevel@tonic-gate if (!(ifl->ifl_flags & FLG_IF_NEEDED)) 5837c478bd9Sstevel@tonic-gate sdp->sd_flags |= FLG_SY_NOTAVAIL; 5847c478bd9Sstevel@tonic-gate 5857c478bd9Sstevel@tonic-gate } else if (etype == ET_REL) { 5867c478bd9Sstevel@tonic-gate /* 5877c478bd9Sstevel@tonic-gate * If this symbol has been obtained from a versioned 5887c478bd9Sstevel@tonic-gate * input relocatable object then the new symbol must be 5897c478bd9Sstevel@tonic-gate * promoted to the versioning of the output file. 5907c478bd9Sstevel@tonic-gate */ 5917c478bd9Sstevel@tonic-gate if (ifl->ifl_versym) 5925aefb655Srie ld_vers_promote(sdp, ndx, ifl, ofl); 5937c478bd9Sstevel@tonic-gate } 5947c478bd9Sstevel@tonic-gate 5957c478bd9Sstevel@tonic-gate if ((ofl->ofl_flags & FLG_OF_GENMAP) && 5967c478bd9Sstevel@tonic-gate ((sdflags & FLG_SY_SPECSEC) == 0)) 59757ef7aa9SRod Evans if (aplist_append(&sap->sa_dfiles, ifl->ifl_name, 59857ef7aa9SRod Evans AL_CNT_SDP_DFILES) == NULL) 5997c478bd9Sstevel@tonic-gate return ((Sym_desc *)S_ERROR); 6007c478bd9Sstevel@tonic-gate } 6017c478bd9Sstevel@tonic-gate 60260758829Srie /* 60360758829Srie * Provided we're not processing a mapfile, diagnose the entered symbol. 60460758829Srie * Mapfile processing requires the symbol to be updated with additional 60560758829Srie * information, therefore the diagnosing of the symbol is deferred until 60660758829Srie * later (see Dbg_map_symbol()). 60760758829Srie */ 6086b3ba5bdSAli Bahrami if ((ifl == NULL) || ((ifl->ifl_flags & FLG_IF_MAPFILE) == 0)) 60960758829Srie DBG_CALL(Dbg_syms_entered(ofl, nsym, sdp)); 6107c478bd9Sstevel@tonic-gate return (sdp); 6117c478bd9Sstevel@tonic-gate } 6127c478bd9Sstevel@tonic-gate 6137c478bd9Sstevel@tonic-gate /* 6147c478bd9Sstevel@tonic-gate * Add a special symbol to the symbol table. Takes special symbol name with 6157c478bd9Sstevel@tonic-gate * and without underscores. This routine is called, after all other symbol 6167c478bd9Sstevel@tonic-gate * resolution has completed, to generate a reserved absolute symbol (the 6177c478bd9Sstevel@tonic-gate * underscore version). Special symbols are updated with the appropriate 618dd94ecefSrie * values in update_osym(). If the user has already defined this symbol 6197c478bd9Sstevel@tonic-gate * issue a warning and leave the symbol as is. If the non-underscore symbol 6207c478bd9Sstevel@tonic-gate * is referenced then turn it into a weak alias of the underscored symbol. 6217c478bd9Sstevel@tonic-gate * 622d579eb63Sab * The bits in flags_u are OR'd into the flags field of the symbol 623d579eb63Sab * for the underscored symbol. 624d579eb63Sab * 6257c478bd9Sstevel@tonic-gate * If this is a global symbol, and it hasn't explicitly been defined as being 6267c478bd9Sstevel@tonic-gate * directly bound to, indicate that it can't be directly bound to. 6277c478bd9Sstevel@tonic-gate * Historically, most special symbols only have meaning to the object in which 628c1c6f601Srie * they exist, however, they've always been global. To ensure compatibility 629c1c6f601Srie * with any unexpected use presently in effect, ensure these symbols don't get 6307c478bd9Sstevel@tonic-gate * directly bound to. Note, that establishing this state here isn't sufficient 6317c478bd9Sstevel@tonic-gate * to create a syminfo table, only if a syminfo table is being created by some 632c1c6f601Srie * other symbol directives will the nodirect binding be recorded. This ensures 6337c478bd9Sstevel@tonic-gate * we don't create syminfo sections for all objects we create, as this might add 6347c478bd9Sstevel@tonic-gate * unnecessary bloat to users who haven't explicitly requested extra symbol 6357c478bd9Sstevel@tonic-gate * information. 6367c478bd9Sstevel@tonic-gate */ 6377c478bd9Sstevel@tonic-gate static uintptr_t 6387c478bd9Sstevel@tonic-gate sym_add_spec(const char *name, const char *uname, Word sdaux_id, 639d579eb63Sab Word flags_u, Half flags1, Ofl_desc *ofl) 6407c478bd9Sstevel@tonic-gate { 6417c478bd9Sstevel@tonic-gate Sym_desc *sdp; 6427c478bd9Sstevel@tonic-gate Sym_desc *usdp; 6437c478bd9Sstevel@tonic-gate Sym *sym; 6447c478bd9Sstevel@tonic-gate Word hash; 6457c478bd9Sstevel@tonic-gate avl_index_t where; 6467c478bd9Sstevel@tonic-gate 6477c478bd9Sstevel@tonic-gate /* LINTED */ 6487c478bd9Sstevel@tonic-gate hash = (Word)elf_hash(uname); 6495aefb655Srie if (usdp = ld_sym_find(uname, hash, &where, ofl)) { 6507c478bd9Sstevel@tonic-gate /* 6517c478bd9Sstevel@tonic-gate * If the underscore symbol exists and is undefined, or was 6527c478bd9Sstevel@tonic-gate * defined in a shared library, convert it to a local symbol. 6537c478bd9Sstevel@tonic-gate * Otherwise leave it as is and warn the user. 6547c478bd9Sstevel@tonic-gate */ 6557c478bd9Sstevel@tonic-gate if ((usdp->sd_shndx == SHN_UNDEF) || 6567c478bd9Sstevel@tonic-gate (usdp->sd_ref != REF_REL_NEED)) { 6577c478bd9Sstevel@tonic-gate usdp->sd_ref = REF_REL_NEED; 6587c478bd9Sstevel@tonic-gate usdp->sd_shndx = usdp->sd_sym->st_shndx = SHN_ABS; 659d579eb63Sab usdp->sd_flags |= FLG_SY_SPECSEC | flags_u; 6607c478bd9Sstevel@tonic-gate usdp->sd_sym->st_info = 6617c478bd9Sstevel@tonic-gate ELF_ST_INFO(STB_GLOBAL, STT_OBJECT); 6627c478bd9Sstevel@tonic-gate usdp->sd_isc = NULL; 6637c478bd9Sstevel@tonic-gate usdp->sd_sym->st_size = 0; 6647c478bd9Sstevel@tonic-gate usdp->sd_sym->st_value = 0; 6657c478bd9Sstevel@tonic-gate /* LINTED */ 6667c478bd9Sstevel@tonic-gate usdp->sd_aux->sa_symspec = (Half)sdaux_id; 6677c478bd9Sstevel@tonic-gate 6687c478bd9Sstevel@tonic-gate /* 6699a411307Srie * If a user hasn't specifically indicated that the 6709a411307Srie * scope of this symbol be made local, then leave it 6719a411307Srie * as global (ie. prevent automatic scoping). The GOT 6729a411307Srie * should be defined protected, whereas all other 6739a411307Srie * special symbols are tagged as no-direct. 6747c478bd9Sstevel@tonic-gate */ 67560758829Srie if (((usdp->sd_flags1 & FLG_SY1_HIDDEN) == 0) && 67660758829Srie (flags1 & FLG_SY1_DEFAULT)) { 67733eb6ee1Sab usdp->sd_aux->sa_overndx = VER_NDX_GLOBAL; 67833eb6ee1Sab if (sdaux_id == SDAUX_ID_GOT) { 67933eb6ee1Sab usdp->sd_flags1 &= ~FLG_SY1_NDIR; 68060758829Srie usdp->sd_flags1 |= FLG_SY1_PROTECT; 68133eb6ee1Sab usdp->sd_sym->st_other = STV_PROTECTED; 68233eb6ee1Sab } else if ( 68333eb6ee1Sab ((usdp->sd_flags1 & FLG_SY1_DIR) == 0) && 68433eb6ee1Sab ((ofl->ofl_flags & FLG_OF_SYMBOLIC) == 0)) { 68533eb6ee1Sab usdp->sd_flags1 |= FLG_SY1_NDIR; 68633eb6ee1Sab } 6877c478bd9Sstevel@tonic-gate } 6887c478bd9Sstevel@tonic-gate usdp->sd_flags1 |= flags1; 6897c478bd9Sstevel@tonic-gate 6907c478bd9Sstevel@tonic-gate /* 691c1c6f601Srie * If the reference originated from a mapfile ensure 6927c478bd9Sstevel@tonic-gate * we mark the symbol as used. 6937c478bd9Sstevel@tonic-gate */ 6947c478bd9Sstevel@tonic-gate if (usdp->sd_flags & FLG_SY_MAPREF) 6957c478bd9Sstevel@tonic-gate usdp->sd_flags |= FLG_SY_MAPUSED; 6967c478bd9Sstevel@tonic-gate 6975aefb655Srie DBG_CALL(Dbg_syms_updated(ofl, usdp, uname)); 6987c478bd9Sstevel@tonic-gate } else 6995aefb655Srie eprintf(ofl->ofl_lml, ERR_WARNING, 7005aefb655Srie MSG_INTL(MSG_SYM_RESERVE), uname, 7017c478bd9Sstevel@tonic-gate usdp->sd_file->ifl_name); 7027c478bd9Sstevel@tonic-gate } else { 7037c478bd9Sstevel@tonic-gate /* 7047c478bd9Sstevel@tonic-gate * If the symbol does not exist create it. 7057c478bd9Sstevel@tonic-gate */ 7066b3ba5bdSAli Bahrami if ((sym = libld_calloc(sizeof (Sym), 1)) == NULL) 7077c478bd9Sstevel@tonic-gate return (S_ERROR); 7087c478bd9Sstevel@tonic-gate sym->st_shndx = SHN_ABS; 7097c478bd9Sstevel@tonic-gate sym->st_info = ELF_ST_INFO(STB_GLOBAL, STT_OBJECT); 7107c478bd9Sstevel@tonic-gate sym->st_size = 0; 7117c478bd9Sstevel@tonic-gate sym->st_value = 0; 7125aefb655Srie DBG_CALL(Dbg_syms_created(ofl->ofl_lml, uname)); 7135aefb655Srie if ((usdp = ld_sym_enter(uname, sym, hash, (Ifl_desc *)NULL, 714d579eb63Sab ofl, 0, SHN_ABS, FLG_SY_SPECSEC | flags_u, 0, &where)) == 7157c478bd9Sstevel@tonic-gate (Sym_desc *)S_ERROR) 7167c478bd9Sstevel@tonic-gate return (S_ERROR); 7177c478bd9Sstevel@tonic-gate usdp->sd_ref = REF_REL_NEED; 7187c478bd9Sstevel@tonic-gate /* LINTED */ 7197c478bd9Sstevel@tonic-gate usdp->sd_aux->sa_symspec = (Half)sdaux_id; 7207c478bd9Sstevel@tonic-gate 7217c478bd9Sstevel@tonic-gate usdp->sd_aux->sa_overndx = VER_NDX_GLOBAL; 7229a411307Srie 7239a411307Srie if (sdaux_id == SDAUX_ID_GOT) { 72460758829Srie usdp->sd_flags1 |= FLG_SY1_PROTECT; 7259a411307Srie usdp->sd_sym->st_other = STV_PROTECTED; 72660758829Srie } else if ((flags1 & FLG_SY1_DEFAULT) && 7279a411307Srie ((ofl->ofl_flags & FLG_OF_SYMBOLIC) == 0)) { 7287c478bd9Sstevel@tonic-gate usdp->sd_flags1 |= FLG_SY1_NDIR; 7299a411307Srie } 7307c478bd9Sstevel@tonic-gate usdp->sd_flags1 |= flags1; 7317c478bd9Sstevel@tonic-gate } 7327c478bd9Sstevel@tonic-gate 7335aefb655Srie if (name && (sdp = ld_sym_find(name, SYM_NOHASH, 0, ofl)) && 7340bc07c75Srie (sdp->sd_sym->st_shndx == SHN_UNDEF)) { 7357c478bd9Sstevel@tonic-gate uchar_t bind; 7367c478bd9Sstevel@tonic-gate 7377c478bd9Sstevel@tonic-gate /* 7387c478bd9Sstevel@tonic-gate * If the non-underscore symbol exists and is undefined 7397c478bd9Sstevel@tonic-gate * convert it to be a local. If the underscore has 7407c478bd9Sstevel@tonic-gate * sa_symspec set (ie. it was created above) then simulate this 7417c478bd9Sstevel@tonic-gate * as a weak alias. 7427c478bd9Sstevel@tonic-gate */ 7437c478bd9Sstevel@tonic-gate sdp->sd_ref = REF_REL_NEED; 7447c478bd9Sstevel@tonic-gate sdp->sd_shndx = sdp->sd_sym->st_shndx = SHN_ABS; 7457c478bd9Sstevel@tonic-gate sdp->sd_flags |= FLG_SY_SPECSEC; 7467c478bd9Sstevel@tonic-gate sdp->sd_isc = NULL; 7477c478bd9Sstevel@tonic-gate sdp->sd_sym->st_size = 0; 7487c478bd9Sstevel@tonic-gate sdp->sd_sym->st_value = 0; 7497c478bd9Sstevel@tonic-gate /* LINTED */ 7507c478bd9Sstevel@tonic-gate sdp->sd_aux->sa_symspec = (Half)sdaux_id; 7517c478bd9Sstevel@tonic-gate if (usdp->sd_aux->sa_symspec) { 7527c478bd9Sstevel@tonic-gate usdp->sd_aux->sa_linkndx = 0; 7537c478bd9Sstevel@tonic-gate sdp->sd_aux->sa_linkndx = 0; 7547c478bd9Sstevel@tonic-gate bind = STB_WEAK; 7557c478bd9Sstevel@tonic-gate } else 7567c478bd9Sstevel@tonic-gate bind = STB_GLOBAL; 7577c478bd9Sstevel@tonic-gate sdp->sd_sym->st_info = ELF_ST_INFO(bind, STT_OBJECT); 7587c478bd9Sstevel@tonic-gate 7597c478bd9Sstevel@tonic-gate /* 7609a411307Srie * If a user hasn't specifically indicated the scope of this 7619a411307Srie * symbol be made local then leave it as global (ie. prevent 7629a411307Srie * automatic scoping). The GOT should be defined protected, 7639a411307Srie * whereas all other special symbols are tagged as no-direct. 7647c478bd9Sstevel@tonic-gate */ 76560758829Srie if (((sdp->sd_flags1 & FLG_SY1_HIDDEN) == 0) && 76660758829Srie (flags1 & FLG_SY1_DEFAULT)) { 7677c478bd9Sstevel@tonic-gate sdp->sd_aux->sa_overndx = VER_NDX_GLOBAL; 7689a411307Srie if (sdaux_id == SDAUX_ID_GOT) { 7699a411307Srie sdp->sd_flags1 &= ~FLG_SY1_NDIR; 77060758829Srie sdp->sd_flags1 |= FLG_SY1_PROTECT; 7719a411307Srie sdp->sd_sym->st_other = STV_PROTECTED; 7729a411307Srie } else if (((sdp->sd_flags1 & FLG_SY1_DIR) == 0) && 7739a411307Srie ((ofl->ofl_flags & FLG_OF_SYMBOLIC) == 0)) { 7747c478bd9Sstevel@tonic-gate sdp->sd_flags1 |= FLG_SY1_NDIR; 7759a411307Srie } 7767c478bd9Sstevel@tonic-gate } 7777c478bd9Sstevel@tonic-gate sdp->sd_flags1 |= flags1; 7787c478bd9Sstevel@tonic-gate 7797c478bd9Sstevel@tonic-gate /* 780c1c6f601Srie * If the reference originated from a mapfile ensure 7817c478bd9Sstevel@tonic-gate * we mark the symbol as used. 7827c478bd9Sstevel@tonic-gate */ 7837c478bd9Sstevel@tonic-gate if (sdp->sd_flags & FLG_SY_MAPREF) 7847c478bd9Sstevel@tonic-gate sdp->sd_flags |= FLG_SY_MAPUSED; 7857c478bd9Sstevel@tonic-gate 7865aefb655Srie DBG_CALL(Dbg_syms_updated(ofl, sdp, name)); 7877c478bd9Sstevel@tonic-gate } 7887c478bd9Sstevel@tonic-gate return (1); 7897c478bd9Sstevel@tonic-gate } 7907c478bd9Sstevel@tonic-gate 7917c478bd9Sstevel@tonic-gate 7927c478bd9Sstevel@tonic-gate /* 7937c478bd9Sstevel@tonic-gate * Print undefined symbols. 7947c478bd9Sstevel@tonic-gate */ 7957c478bd9Sstevel@tonic-gate static Boolean undef_title = TRUE; 7967c478bd9Sstevel@tonic-gate 7975aefb655Srie static void 7985aefb655Srie sym_undef_title(Ofl_desc *ofl) 7997c478bd9Sstevel@tonic-gate { 8005aefb655Srie eprintf(ofl->ofl_lml, ERR_NONE, MSG_INTL(MSG_SYM_FMT_UNDEF), 80133eb6ee1Sab MSG_INTL(MSG_SYM_UNDEF_ITM_11), 80233eb6ee1Sab MSG_INTL(MSG_SYM_UNDEF_ITM_21), 80333eb6ee1Sab MSG_INTL(MSG_SYM_UNDEF_ITM_12), 80433eb6ee1Sab MSG_INTL(MSG_SYM_UNDEF_ITM_22)); 8057c478bd9Sstevel@tonic-gate 8067c478bd9Sstevel@tonic-gate undef_title = FALSE; 8077c478bd9Sstevel@tonic-gate } 8087c478bd9Sstevel@tonic-gate 8097c478bd9Sstevel@tonic-gate /* 8107c478bd9Sstevel@tonic-gate * Undefined symbols can fall into one of four types: 8117c478bd9Sstevel@tonic-gate * 8126b3ba5bdSAli Bahrami * - the symbol is really undefined (SHN_UNDEF). 8137c478bd9Sstevel@tonic-gate * 8146b3ba5bdSAli Bahrami * - versioning has been enabled, however this symbol has not been assigned 8157c478bd9Sstevel@tonic-gate * to one of the defined versions. 8167c478bd9Sstevel@tonic-gate * 8176b3ba5bdSAli Bahrami * - the symbol has been defined by an implicitly supplied library, ie. one 8187c478bd9Sstevel@tonic-gate * which was encounted because it was NEEDED by another library, rather 8197c478bd9Sstevel@tonic-gate * than from a command line supplied library which would become the only 8207c478bd9Sstevel@tonic-gate * dependency of the output file being produced. 8217c478bd9Sstevel@tonic-gate * 8226b3ba5bdSAli Bahrami * - the symbol has been defined by a version of a shared object that is 8237c478bd9Sstevel@tonic-gate * not permitted for this link-edit. 8247c478bd9Sstevel@tonic-gate * 8257c478bd9Sstevel@tonic-gate * In all cases the file who made the first reference to this symbol will have 8267c478bd9Sstevel@tonic-gate * been recorded via the `sa_rfile' pointer. 8277c478bd9Sstevel@tonic-gate */ 8287c478bd9Sstevel@tonic-gate typedef enum { 8297c478bd9Sstevel@tonic-gate UNDEF, NOVERSION, IMPLICIT, NOTAVAIL, 8307c478bd9Sstevel@tonic-gate BNDLOCAL 8317c478bd9Sstevel@tonic-gate } Type; 8327c478bd9Sstevel@tonic-gate 8337c478bd9Sstevel@tonic-gate static const Msg format[] = { 8347c478bd9Sstevel@tonic-gate MSG_SYM_UND_UNDEF, /* MSG_INTL(MSG_SYM_UND_UNDEF) */ 8357c478bd9Sstevel@tonic-gate MSG_SYM_UND_NOVER, /* MSG_INTL(MSG_SYM_UND_NOVER) */ 8367c478bd9Sstevel@tonic-gate MSG_SYM_UND_IMPL, /* MSG_INTL(MSG_SYM_UND_IMPL) */ 8377c478bd9Sstevel@tonic-gate MSG_SYM_UND_NOTA, /* MSG_INTL(MSG_SYM_UND_NOTA) */ 8387c478bd9Sstevel@tonic-gate MSG_SYM_UND_BNDLOCAL /* MSG_INTL(MSG_SYM_UND_BNDLOCAL) */ 8397c478bd9Sstevel@tonic-gate }; 8407c478bd9Sstevel@tonic-gate 8415aefb655Srie static void 8425aefb655Srie sym_undef_entry(Ofl_desc *ofl, Sym_desc *sdp, Type type) 8437c478bd9Sstevel@tonic-gate { 8447c478bd9Sstevel@tonic-gate const char *name1, *name2, *name3; 8457c478bd9Sstevel@tonic-gate Ifl_desc *ifl = sdp->sd_file; 8467c478bd9Sstevel@tonic-gate Sym_aux *sap = sdp->sd_aux; 8477c478bd9Sstevel@tonic-gate 8487c478bd9Sstevel@tonic-gate if (undef_title) 8495aefb655Srie sym_undef_title(ofl); 8507c478bd9Sstevel@tonic-gate 8517c478bd9Sstevel@tonic-gate switch (type) { 8527c478bd9Sstevel@tonic-gate case UNDEF: 8537c478bd9Sstevel@tonic-gate case BNDLOCAL: 8547c478bd9Sstevel@tonic-gate name1 = sap->sa_rfile; 8557c478bd9Sstevel@tonic-gate break; 8567c478bd9Sstevel@tonic-gate case NOVERSION: 8577c478bd9Sstevel@tonic-gate name1 = ifl->ifl_name; 8587c478bd9Sstevel@tonic-gate break; 8597c478bd9Sstevel@tonic-gate case IMPLICIT: 8607c478bd9Sstevel@tonic-gate name1 = sap->sa_rfile; 8617c478bd9Sstevel@tonic-gate name2 = ifl->ifl_name; 8627c478bd9Sstevel@tonic-gate break; 8637c478bd9Sstevel@tonic-gate case NOTAVAIL: 8647c478bd9Sstevel@tonic-gate name1 = sap->sa_rfile; 8657c478bd9Sstevel@tonic-gate name2 = sap->sa_vfile; 8667c478bd9Sstevel@tonic-gate name3 = ifl->ifl_verndx[sap->sa_dverndx].vi_name; 8677c478bd9Sstevel@tonic-gate break; 8687c478bd9Sstevel@tonic-gate default: 8697c478bd9Sstevel@tonic-gate return; 8707c478bd9Sstevel@tonic-gate } 8717c478bd9Sstevel@tonic-gate 8725aefb655Srie eprintf(ofl->ofl_lml, ERR_NONE, MSG_INTL(format[type]), 8735aefb655Srie demangle(sdp->sd_name), name1, name2, name3); 8747c478bd9Sstevel@tonic-gate } 8757c478bd9Sstevel@tonic-gate 8767c478bd9Sstevel@tonic-gate /* 8777c478bd9Sstevel@tonic-gate * At this point all symbol input processing has been completed, therefore 8787c478bd9Sstevel@tonic-gate * complete the symbol table entries by generating any necessary internal 8797c478bd9Sstevel@tonic-gate * symbols. 8807c478bd9Sstevel@tonic-gate */ 8817c478bd9Sstevel@tonic-gate uintptr_t 8825aefb655Srie ld_sym_spec(Ofl_desc *ofl) 8837c478bd9Sstevel@tonic-gate { 8849a411307Srie Sym_desc *sdp; 8857c478bd9Sstevel@tonic-gate 8869a411307Srie if (ofl->ofl_flags & FLG_OF_RELOBJ) 8879a411307Srie return (1); 8887c478bd9Sstevel@tonic-gate 8899a411307Srie DBG_CALL(Dbg_syms_spec_title(ofl->ofl_lml)); 8909a411307Srie 8919a411307Srie if (sym_add_spec(MSG_ORIG(MSG_SYM_ETEXT), MSG_ORIG(MSG_SYM_ETEXT_U), 89260758829Srie SDAUX_ID_ETEXT, 0, (FLG_SY1_DEFAULT | FLG_SY1_EXPDEF), 89360758829Srie ofl) == S_ERROR) 8949a411307Srie return (S_ERROR); 8959a411307Srie if (sym_add_spec(MSG_ORIG(MSG_SYM_EDATA), MSG_ORIG(MSG_SYM_EDATA_U), 89660758829Srie SDAUX_ID_EDATA, 0, (FLG_SY1_DEFAULT | FLG_SY1_EXPDEF), 89760758829Srie ofl) == S_ERROR) 8989a411307Srie return (S_ERROR); 8999a411307Srie if (sym_add_spec(MSG_ORIG(MSG_SYM_END), MSG_ORIG(MSG_SYM_END_U), 90060758829Srie SDAUX_ID_END, FLG_SY_DYNSORT, (FLG_SY1_DEFAULT | FLG_SY1_EXPDEF), 90160758829Srie ofl) == S_ERROR) 9029a411307Srie return (S_ERROR); 9039a411307Srie if (sym_add_spec(MSG_ORIG(MSG_SYM_L_END), MSG_ORIG(MSG_SYM_L_END_U), 90460758829Srie SDAUX_ID_END, 0, FLG_SY1_HIDDEN, ofl) == S_ERROR) 9059a411307Srie return (S_ERROR); 9069a411307Srie if (sym_add_spec(MSG_ORIG(MSG_SYM_L_START), MSG_ORIG(MSG_SYM_L_START_U), 90760758829Srie SDAUX_ID_START, 0, FLG_SY1_HIDDEN, ofl) == S_ERROR) 9089a411307Srie return (S_ERROR); 9097c478bd9Sstevel@tonic-gate 9109a411307Srie /* 9119a411307Srie * Historically we've always produced a _DYNAMIC symbol, even for 9129a411307Srie * static executables (in which case its value will be 0). 9139a411307Srie */ 9149a411307Srie if (sym_add_spec(MSG_ORIG(MSG_SYM_DYNAMIC), MSG_ORIG(MSG_SYM_DYNAMIC_U), 91560758829Srie SDAUX_ID_DYN, FLG_SY_DYNSORT, (FLG_SY1_DEFAULT | FLG_SY1_EXPDEF), 91660758829Srie ofl) == S_ERROR) 9179a411307Srie return (S_ERROR); 9189a411307Srie 919d579eb63Sab if (OFL_ALLOW_DYNSYM(ofl)) 9209a411307Srie if (sym_add_spec(MSG_ORIG(MSG_SYM_PLKTBL), 9219a411307Srie MSG_ORIG(MSG_SYM_PLKTBL_U), SDAUX_ID_PLT, 92260758829Srie FLG_SY_DYNSORT, (FLG_SY1_DEFAULT | FLG_SY1_EXPDEF), 92360758829Srie ofl) == S_ERROR) 9247c478bd9Sstevel@tonic-gate return (S_ERROR); 9257c478bd9Sstevel@tonic-gate 9269a411307Srie /* 9279a411307Srie * A GOT reference will be accompanied by the associated GOT symbol. 9289a411307Srie * Make sure it gets assigned the appropriate special attributes. 9299a411307Srie */ 9309a411307Srie if (((sdp = ld_sym_find(MSG_ORIG(MSG_SYM_GOFTBL_U), 9319a411307Srie SYM_NOHASH, 0, ofl)) != 0) && (sdp->sd_ref != REF_DYN_SEEN)) { 9329a411307Srie if (sym_add_spec(MSG_ORIG(MSG_SYM_GOFTBL), 933d579eb63Sab MSG_ORIG(MSG_SYM_GOFTBL_U), SDAUX_ID_GOT, FLG_SY_DYNSORT, 93460758829Srie (FLG_SY1_DEFAULT | FLG_SY1_EXPDEF), ofl) == S_ERROR) 9359a411307Srie return (S_ERROR); 9367c478bd9Sstevel@tonic-gate } 9379a411307Srie 9387c478bd9Sstevel@tonic-gate return (1); 9397c478bd9Sstevel@tonic-gate } 9407c478bd9Sstevel@tonic-gate 9417c478bd9Sstevel@tonic-gate /* 9427c478bd9Sstevel@tonic-gate * This routine checks to see if a symbols visibility needs to be reduced to 9437c478bd9Sstevel@tonic-gate * either SYMBOLIC or LOCAL. This routine can be called from either 9447c478bd9Sstevel@tonic-gate * reloc_init() or sym_validate(). 9457c478bd9Sstevel@tonic-gate */ 9467c478bd9Sstevel@tonic-gate void 9475aefb655Srie ld_sym_adjust_vis(Sym_desc *sdp, Ofl_desc *ofl) 9487c478bd9Sstevel@tonic-gate { 94944bac77bSrie ofl_flag_t oflags = ofl->ofl_flags; 95044bac77bSrie Sym *sym = sdp->sd_sym; 9517c478bd9Sstevel@tonic-gate 9520bc07c75Srie if ((sdp->sd_ref == REF_REL_NEED) && 9530bc07c75Srie (sdp->sd_sym->st_shndx != SHN_UNDEF)) { 9547c478bd9Sstevel@tonic-gate /* 95560758829Srie * If auto-reduction/elimination is enabled, reduce any 95660758829Srie * non-versioned global symbols. This routine is called either 95760758829Srie * from any initial relocation processing that references this 95860758829Srie * symbol, or from the symbol validation processing. 95960758829Srie * 96060758829Srie * A symbol is a candidate for auto-reduction/elimination if: 96160758829Srie * 96260758829Srie * . the symbol wasn't explicitly defined within a mapfile 96360758829Srie * (in which case all the necessary state has been applied 96460758829Srie * to the symbol), or 96560758829Srie * . the symbol isn't one of the family of reserved 96660758829Srie * special symbols (ie. _end, _etext, etc.), or 96760758829Srie * . the symbol isn't a SINGLETON, or 96860758829Srie * . the symbol wasn't explicitly defined within a version 96960758829Srie * definition associated with an input relocatable object. 97060758829Srie * 9717c478bd9Sstevel@tonic-gate * Indicate that the symbol has been reduced as it may be 9727c478bd9Sstevel@tonic-gate * necessary to print these symbols later. 9737c478bd9Sstevel@tonic-gate */ 97444bac77bSrie if ((oflags & (FLG_OF_AUTOLCL | FLG_OF_AUTOELM)) && 97560758829Srie ((sdp->sd_flags1 & MSK_SY1_NOAUTO) == 0)) { 97660758829Srie if ((sdp->sd_flags1 & FLG_SY1_HIDDEN) == 0) { 97760758829Srie sdp->sd_flags |= FLG_SY_REDUCED; 97860758829Srie sdp->sd_flags1 |= FLG_SY1_HIDDEN; 97960758829Srie } 9807c478bd9Sstevel@tonic-gate 98144bac77bSrie if (oflags & (FLG_OF_REDLSYM | FLG_OF_AUTOELM)) { 9827c478bd9Sstevel@tonic-gate sdp->sd_flags1 |= FLG_SY1_ELIM; 98360758829Srie sym->st_other = STV_ELIMINATE | 98460758829Srie (sym->st_other & ~MSK_SYM_VISIBILITY); 98560758829Srie } else if (ELF_ST_VISIBILITY(sym->st_other) != 98660758829Srie STV_INTERNAL) 98760758829Srie sym->st_other = STV_HIDDEN | 98860758829Srie (sym->st_other & ~MSK_SYM_VISIBILITY); 9897c478bd9Sstevel@tonic-gate } 9907c478bd9Sstevel@tonic-gate 9917c478bd9Sstevel@tonic-gate /* 9929a411307Srie * If -Bsymbolic is in effect, and the symbol hasn't explicitly 9939a411307Srie * been defined nodirect (via a mapfile), then bind the global 9949a411307Srie * symbol symbolically and assign the STV_PROTECTED visibility 9957c478bd9Sstevel@tonic-gate * attribute. 9967c478bd9Sstevel@tonic-gate */ 9977c478bd9Sstevel@tonic-gate if ((oflags & FLG_OF_SYMBOLIC) && 99860758829Srie ((sdp->sd_flags1 & (FLG_SY1_HIDDEN | FLG_SY1_NDIR)) == 0)) { 99960758829Srie sdp->sd_flags1 |= FLG_SY1_PROTECT; 10007c478bd9Sstevel@tonic-gate if (ELF_ST_VISIBILITY(sym->st_other) == STV_DEFAULT) 10017c478bd9Sstevel@tonic-gate sym->st_other = STV_PROTECTED | 10027c478bd9Sstevel@tonic-gate (sym->st_other & ~MSK_SYM_VISIBILITY); 10037c478bd9Sstevel@tonic-gate } 10047c478bd9Sstevel@tonic-gate } 10057c478bd9Sstevel@tonic-gate 10067c478bd9Sstevel@tonic-gate /* 10077c478bd9Sstevel@tonic-gate * Indicate that this symbol has had it's visibility checked so that 10087c478bd9Sstevel@tonic-gate * we don't need to do this investigation again. 10097c478bd9Sstevel@tonic-gate */ 10107c478bd9Sstevel@tonic-gate sdp->sd_flags |= FLG_SY_VISIBLE; 10117c478bd9Sstevel@tonic-gate } 10127c478bd9Sstevel@tonic-gate 1013c1c6f601Srie /* 1014c1c6f601Srie * Make sure a symbol definition is local to the object being built. 1015c1c6f601Srie */ 101657ef7aa9SRod Evans inline static int 1017c1c6f601Srie ensure_sym_local(Ofl_desc *ofl, Sym_desc *sdp, const char *str) 1018c1c6f601Srie { 1019c1c6f601Srie if (sdp->sd_sym->st_shndx == SHN_UNDEF) { 1020c1c6f601Srie if (str) { 1021c1c6f601Srie eprintf(ofl->ofl_lml, ERR_FATAL, 1022c1c6f601Srie MSG_INTL(MSG_SYM_UNDEF), str, 1023c1c6f601Srie demangle((char *)sdp->sd_name)); 1024c1c6f601Srie } 1025c1c6f601Srie return (1); 1026c1c6f601Srie } 1027c1c6f601Srie if (sdp->sd_ref != REF_REL_NEED) { 1028c1c6f601Srie if (str) { 1029c1c6f601Srie eprintf(ofl->ofl_lml, ERR_FATAL, 1030c1c6f601Srie MSG_INTL(MSG_SYM_EXTERN), str, 1031c1c6f601Srie demangle((char *)sdp->sd_name), 1032c1c6f601Srie sdp->sd_file->ifl_name); 1033c1c6f601Srie } 1034c1c6f601Srie return (1); 1035c1c6f601Srie } 1036c1c6f601Srie 1037c1c6f601Srie sdp->sd_flags |= FLG_SY_UPREQD; 1038c1c6f601Srie if (sdp->sd_isc) { 1039c1c6f601Srie sdp->sd_isc->is_flags |= FLG_IS_SECTREF; 1040c1c6f601Srie sdp->sd_isc->is_file->ifl_flags |= FLG_IF_FILEREF; 1041c1c6f601Srie } 1042c1c6f601Srie return (0); 1043c1c6f601Srie } 1044c1c6f601Srie 1045c1c6f601Srie /* 1046c1c6f601Srie * Make sure all the symbol definitions required for initarray, finiarray, or 1047c1c6f601Srie * preinitarray's are local to the object being built. 1048c1c6f601Srie */ 1049c1c6f601Srie static int 105057ef7aa9SRod Evans ensure_array_local(Ofl_desc *ofl, APlist *apl, const char *str) 1051c1c6f601Srie { 105257ef7aa9SRod Evans Aliste idx; 1053c1c6f601Srie Sym_desc *sdp; 1054c1c6f601Srie int ret = 0; 1055c1c6f601Srie 105657ef7aa9SRod Evans for (APLIST_TRAVERSE(apl, idx, sdp)) 1057c1c6f601Srie ret += ensure_sym_local(ofl, sdp, str); 1058c1c6f601Srie 1059c1c6f601Srie return (ret); 1060c1c6f601Srie } 1061c1c6f601Srie 10627c478bd9Sstevel@tonic-gate /* 10637c478bd9Sstevel@tonic-gate * After all symbol table input processing has been finished, and all relocation 10647c478bd9Sstevel@tonic-gate * counting has been carried out (ie. no more symbols will be read, generated, 10657c478bd9Sstevel@tonic-gate * or modified), validate and count the relevant entries: 10667c478bd9Sstevel@tonic-gate * 10676b3ba5bdSAli Bahrami * - check and print any undefined symbols remaining. Note that 10687c478bd9Sstevel@tonic-gate * if a symbol has been defined by virtue of the inclusion of 10697c478bd9Sstevel@tonic-gate * an implicit shared library, it is still classed as undefined. 10707c478bd9Sstevel@tonic-gate * 10716b3ba5bdSAli Bahrami * - count the number of global needed symbols together with the 10727c478bd9Sstevel@tonic-gate * size of their associated name strings (if scoping has been 10737c478bd9Sstevel@tonic-gate * indicated these symbols may be reduced to locals). 10747c478bd9Sstevel@tonic-gate * 10756b3ba5bdSAli Bahrami * - establish the size and alignment requirements for the global 10767c478bd9Sstevel@tonic-gate * .bss section (the alignment of this section is based on the 10777c478bd9Sstevel@tonic-gate * first symbol that it will contain). 10787c478bd9Sstevel@tonic-gate */ 10797c478bd9Sstevel@tonic-gate uintptr_t 10805aefb655Srie ld_sym_validate(Ofl_desc *ofl) 10817c478bd9Sstevel@tonic-gate { 10827c478bd9Sstevel@tonic-gate Sym_avlnode *sav; 10837c478bd9Sstevel@tonic-gate Sym_desc *sdp; 10847c478bd9Sstevel@tonic-gate Sym *sym; 10851d9df23bSab ofl_flag_t oflags = ofl->ofl_flags; 10861d9df23bSab ofl_flag_t undef = 0, needed = 0, verdesc = 0; 10877c478bd9Sstevel@tonic-gate Xword bssalign = 0, tlsalign = 0; 10887c478bd9Sstevel@tonic-gate Xword bsssize = 0, tlssize = 0; 1089ba2be530Sab #if defined(_ELF64) 109054d82594Sseizo Xword lbssalign = 0, lbsssize = 0; 109154d82594Sseizo #endif 1092c1c6f601Srie int ret; 10939039eeafSab int allow_ldynsym; 1094d579eb63Sab uchar_t type; 10957c478bd9Sstevel@tonic-gate 10962017c965SRod Evans DBG_CALL(Dbg_basic_validate(ofl->ofl_lml)); 10972017c965SRod Evans 10987c478bd9Sstevel@tonic-gate /* 10997c478bd9Sstevel@tonic-gate * If a symbol is undefined and this link-edit calls for no undefined 11007c478bd9Sstevel@tonic-gate * symbols to remain (this is the default case when generating an 11017c478bd9Sstevel@tonic-gate * executable but can be enforced for any object using -z defs), the 11027c478bd9Sstevel@tonic-gate * symbol is classified as undefined and a fatal error condition will 11037c478bd9Sstevel@tonic-gate * be indicated. 11047c478bd9Sstevel@tonic-gate * 11057c478bd9Sstevel@tonic-gate * If the symbol is undefined and we're creating a shared object with 11067c478bd9Sstevel@tonic-gate * the -Bsymbolic flag, then the symbol is also classified as undefined 11077c478bd9Sstevel@tonic-gate * and a warning condition will be indicated. 11087c478bd9Sstevel@tonic-gate */ 11097c478bd9Sstevel@tonic-gate if ((oflags & (FLG_OF_SHAROBJ | FLG_OF_SYMBOLIC)) == 11107c478bd9Sstevel@tonic-gate (FLG_OF_SHAROBJ | FLG_OF_SYMBOLIC)) 11117c478bd9Sstevel@tonic-gate undef = FLG_OF_WARN; 11127c478bd9Sstevel@tonic-gate if (oflags & FLG_OF_NOUNDEF) 11137c478bd9Sstevel@tonic-gate undef = FLG_OF_FATAL; 11147c478bd9Sstevel@tonic-gate 11157c478bd9Sstevel@tonic-gate /* 11167c478bd9Sstevel@tonic-gate * If the symbol is referenced from an implicitly included shared object 11177c478bd9Sstevel@tonic-gate * (ie. it's not on the NEEDED list) then the symbol is also classified 11187c478bd9Sstevel@tonic-gate * as undefined and a fatal error condition will be indicated. 11197c478bd9Sstevel@tonic-gate */ 11207c478bd9Sstevel@tonic-gate if ((oflags & FLG_OF_NOUNDEF) || !(oflags & FLG_OF_SHAROBJ)) 11217c478bd9Sstevel@tonic-gate needed = FLG_OF_FATAL; 11227c478bd9Sstevel@tonic-gate 11237c478bd9Sstevel@tonic-gate /* 11247c478bd9Sstevel@tonic-gate * If the output image is being versioned all symbol definitions must be 11257c478bd9Sstevel@tonic-gate * associated with a version. Any symbol that isn't is classified as 11267c478bd9Sstevel@tonic-gate * undefined and a fatal error condition will be indicated. 11277c478bd9Sstevel@tonic-gate */ 11287c478bd9Sstevel@tonic-gate if ((oflags & FLG_OF_VERDEF) && (ofl->ofl_vercnt > VER_NDX_GLOBAL)) 11297c478bd9Sstevel@tonic-gate verdesc = FLG_OF_FATAL; 11307c478bd9Sstevel@tonic-gate 11319039eeafSab allow_ldynsym = OFL_ALLOW_LDYNSYM(ofl); 1132d579eb63Sab 1133d579eb63Sab if (allow_ldynsym) { 1134d579eb63Sab /* 1135d579eb63Sab * Normally, we disallow symbols with 0 size from appearing 1136d579eb63Sab * in a dyn[sym|tls]sort section. However, there are some 1137d579eb63Sab * symbols that serve special purposes that we want to exempt 1138d579eb63Sab * from this rule. Look them up, and set their 1139d579eb63Sab * FLG_SY_DYNSORT flag. 1140d579eb63Sab */ 1141d579eb63Sab static const char *special[] = { 1142d579eb63Sab MSG_ORIG(MSG_SYM_INIT_U), /* _init */ 1143d579eb63Sab MSG_ORIG(MSG_SYM_FINI_U), /* _fini */ 1144d579eb63Sab MSG_ORIG(MSG_SYM_START), /* _start */ 1145d579eb63Sab NULL 1146d579eb63Sab }; 1147d579eb63Sab int i; 1148d579eb63Sab 1149d579eb63Sab for (i = 0; special[i] != NULL; i++) { 1150d579eb63Sab if (((sdp = ld_sym_find(special[i], 1151d579eb63Sab SYM_NOHASH, 0, ofl)) != NULL) && 1152d579eb63Sab (sdp->sd_sym->st_size == 0)) { 1153d579eb63Sab if (ld_sym_copy(sdp) == S_ERROR) 1154d579eb63Sab return (S_ERROR); 1155d579eb63Sab sdp->sd_flags |= FLG_SY_DYNSORT; 1156d579eb63Sab } 1157d579eb63Sab } 1158d579eb63Sab } 1159d579eb63Sab 11607c478bd9Sstevel@tonic-gate /* 11617c478bd9Sstevel@tonic-gate * Collect and validate the globals from the internal symbol table. 11627c478bd9Sstevel@tonic-gate */ 11637c478bd9Sstevel@tonic-gate for (sav = avl_first(&ofl->ofl_symavl); sav; 11647c478bd9Sstevel@tonic-gate sav = AVL_NEXT(&ofl->ofl_symavl, sav)) { 116560758829Srie Is_desc *isp; 11660bc07c75Srie int undeferr = 0; 116760758829Srie uchar_t vis; 11687c478bd9Sstevel@tonic-gate 11697c478bd9Sstevel@tonic-gate sdp = sav->sav_symdesc; 11707c478bd9Sstevel@tonic-gate 11717c478bd9Sstevel@tonic-gate /* 11727c478bd9Sstevel@tonic-gate * If undefined symbols are allowed ignore any symbols that are 11737c478bd9Sstevel@tonic-gate * not needed. 11747c478bd9Sstevel@tonic-gate */ 11757c478bd9Sstevel@tonic-gate if (!(oflags & FLG_OF_NOUNDEF) && 11767c478bd9Sstevel@tonic-gate (sdp->sd_ref == REF_DYN_SEEN)) 11777c478bd9Sstevel@tonic-gate continue; 11787c478bd9Sstevel@tonic-gate 11797c478bd9Sstevel@tonic-gate /* 11807c478bd9Sstevel@tonic-gate * If the symbol originates from an external or parent mapfile 11817c478bd9Sstevel@tonic-gate * reference and hasn't been matched to a reference from a 11827c478bd9Sstevel@tonic-gate * relocatable object, ignore it. 11837c478bd9Sstevel@tonic-gate */ 11847c478bd9Sstevel@tonic-gate if ((sdp->sd_flags & (FLG_SY_EXTERN | FLG_SY_PARENT)) && 11857c478bd9Sstevel@tonic-gate ((sdp->sd_flags & FLG_SY_MAPUSED) == 0)) { 11867c478bd9Sstevel@tonic-gate sdp->sd_flags |= FLG_SY_INVALID; 11877c478bd9Sstevel@tonic-gate continue; 11887c478bd9Sstevel@tonic-gate } 11897c478bd9Sstevel@tonic-gate 11907c478bd9Sstevel@tonic-gate sym = sdp->sd_sym; 1191d579eb63Sab type = ELF_ST_TYPE(sym->st_info); 11927c478bd9Sstevel@tonic-gate 11937c478bd9Sstevel@tonic-gate /* 11947c478bd9Sstevel@tonic-gate * Sanity check TLS. 11957c478bd9Sstevel@tonic-gate */ 1196d579eb63Sab if ((type == STT_TLS) && (sym->st_size != 0) && 1197d579eb63Sab (sym->st_shndx != SHN_UNDEF) && 11980bc07c75Srie (sym->st_shndx != SHN_COMMON)) { 119960758829Srie Is_desc *isp = sdp->sd_isc; 120060758829Srie Ifl_desc *ifl = sdp->sd_file; 12017c478bd9Sstevel@tonic-gate 12026b3ba5bdSAli Bahrami if ((isp == NULL) || (isp->is_shdr == NULL) || 12037c478bd9Sstevel@tonic-gate ((isp->is_shdr->sh_flags & SHF_TLS) == 0)) { 12045aefb655Srie eprintf(ofl->ofl_lml, ERR_FATAL, 12055aefb655Srie MSG_INTL(MSG_SYM_TLS), 12067c478bd9Sstevel@tonic-gate demangle(sdp->sd_name), ifl->ifl_name); 12077c478bd9Sstevel@tonic-gate ofl->ofl_flags |= FLG_OF_FATAL; 12087c478bd9Sstevel@tonic-gate continue; 12097c478bd9Sstevel@tonic-gate } 12107c478bd9Sstevel@tonic-gate } 12117c478bd9Sstevel@tonic-gate 12127c478bd9Sstevel@tonic-gate if ((sdp->sd_flags & FLG_SY_VISIBLE) == 0) 12135aefb655Srie ld_sym_adjust_vis(sdp, ofl); 12147c478bd9Sstevel@tonic-gate 12157c478bd9Sstevel@tonic-gate if ((sdp->sd_flags & FLG_SY_REDUCED) && 12167c478bd9Sstevel@tonic-gate (oflags & FLG_OF_PROCRED)) { 12175aefb655Srie DBG_CALL(Dbg_syms_reduce(ofl, DBG_SYM_REDUCE_GLOBAL, 12185aefb655Srie sdp, 0, 0)); 12197c478bd9Sstevel@tonic-gate } 12207c478bd9Sstevel@tonic-gate 122160758829Srie /* 122260758829Srie * Record any STV_SINGLETON existence. 122360758829Srie */ 122460758829Srie if ((vis = ELF_ST_VISIBILITY(sym->st_other)) == STV_SINGLETON) 122560758829Srie ofl->ofl_dtflags_1 |= DF_1_SINGLETON; 122660758829Srie 12277c478bd9Sstevel@tonic-gate /* 12287c478bd9Sstevel@tonic-gate * If building a shared object or executable, and this is a 12297c478bd9Sstevel@tonic-gate * non-weak UNDEF symbol with reduced visibility (STV_*), then 12307c478bd9Sstevel@tonic-gate * give a fatal error. 12317c478bd9Sstevel@tonic-gate */ 123260758829Srie if (((oflags & FLG_OF_RELOBJ) == 0) && 12330bc07c75Srie (sym->st_shndx == SHN_UNDEF) && 12347c478bd9Sstevel@tonic-gate (ELF_ST_BIND(sym->st_info) != STB_WEAK)) { 123560758829Srie if (vis && (vis != STV_SINGLETON)) { 123660758829Srie sym_undef_entry(ofl, sdp, BNDLOCAL); 123760758829Srie ofl->ofl_flags |= FLG_OF_FATAL; 123860758829Srie continue; 123960758829Srie } 12407c478bd9Sstevel@tonic-gate } 12417c478bd9Sstevel@tonic-gate 12427c478bd9Sstevel@tonic-gate /* 12437c478bd9Sstevel@tonic-gate * If this symbol is defined in a non-allocatable section, 12447c478bd9Sstevel@tonic-gate * reduce it to local symbol. 12457c478bd9Sstevel@tonic-gate */ 12467c478bd9Sstevel@tonic-gate if (((isp = sdp->sd_isc) != 0) && isp->is_shdr && 12477c478bd9Sstevel@tonic-gate ((isp->is_shdr->sh_flags & SHF_ALLOC) == 0)) { 12487c478bd9Sstevel@tonic-gate sdp->sd_flags |= FLG_SY_REDUCED; 124960758829Srie sdp->sd_flags1 |= FLG_SY1_HIDDEN; 12507c478bd9Sstevel@tonic-gate } 12517c478bd9Sstevel@tonic-gate 12527c478bd9Sstevel@tonic-gate /* 12537c478bd9Sstevel@tonic-gate * If this symbol originated as a SHN_SUNW_IGNORE, it will have 12547c478bd9Sstevel@tonic-gate * been processed as an SHN_UNDEF. Return the symbol to its 12557c478bd9Sstevel@tonic-gate * original index for validation, and propagation to the output 12567c478bd9Sstevel@tonic-gate * file. 12577c478bd9Sstevel@tonic-gate */ 12587c478bd9Sstevel@tonic-gate if (sdp->sd_flags1 & FLG_SY1_IGNORE) 12590bc07c75Srie sdp->sd_shndx = SHN_SUNW_IGNORE; 12607c478bd9Sstevel@tonic-gate 12617c478bd9Sstevel@tonic-gate if (undef) { 12627c478bd9Sstevel@tonic-gate /* 12633b41b08bSab * If a non-weak reference remains undefined, or if a 12647c478bd9Sstevel@tonic-gate * mapfile reference is not bound to the relocatable 12657c478bd9Sstevel@tonic-gate * objects that make up the object being built, we have 12667c478bd9Sstevel@tonic-gate * a fatal error. 12677c478bd9Sstevel@tonic-gate * 12687c478bd9Sstevel@tonic-gate * The exceptions are symbols which are defined to be 12697c478bd9Sstevel@tonic-gate * found in the parent (FLG_SY_PARENT), which is really 12707c478bd9Sstevel@tonic-gate * only meaningful for direct binding, or are defined 12717c478bd9Sstevel@tonic-gate * external (FLG_SY_EXTERN) so as to suppress -zdefs 12727c478bd9Sstevel@tonic-gate * errors. 12737c478bd9Sstevel@tonic-gate * 12747c478bd9Sstevel@tonic-gate * Register symbols are always allowed to be UNDEF. 12757c478bd9Sstevel@tonic-gate * 12767c478bd9Sstevel@tonic-gate * Note that we don't include references created via -u 12777c478bd9Sstevel@tonic-gate * in the same shared object binding test. This is for 12787c478bd9Sstevel@tonic-gate * backward compatibility, in that a number of archive 12797c478bd9Sstevel@tonic-gate * makefile rules used -u to cause archive extraction. 12807c478bd9Sstevel@tonic-gate * These same rules have been cut and pasted to apply 12817c478bd9Sstevel@tonic-gate * to shared objects, and thus although the -u reference 12827c478bd9Sstevel@tonic-gate * is redundant, flagging it as fatal could cause some 12837c478bd9Sstevel@tonic-gate * build to fail. Also we have documented the use of 12847c478bd9Sstevel@tonic-gate * -u as a mechanism to cause binding to weak version 12857c478bd9Sstevel@tonic-gate * definitions, thus giving users an error condition 12867c478bd9Sstevel@tonic-gate * would be incorrect. 12877c478bd9Sstevel@tonic-gate */ 12887c478bd9Sstevel@tonic-gate if (!(sdp->sd_flags & FLG_SY_REGSYM) && 12890bc07c75Srie ((sym->st_shndx == SHN_UNDEF) && 12907c478bd9Sstevel@tonic-gate ((ELF_ST_BIND(sym->st_info) != STB_WEAK) && 12917c478bd9Sstevel@tonic-gate ((sdp->sd_flags & 12927c478bd9Sstevel@tonic-gate (FLG_SY_PARENT | FLG_SY_EXTERN)) == 0)) || 12937c478bd9Sstevel@tonic-gate (((sdp->sd_flags & 12947c478bd9Sstevel@tonic-gate (FLG_SY_MAPREF | FLG_SY_MAPUSED)) == 12957c478bd9Sstevel@tonic-gate FLG_SY_MAPREF) && 129660758829Srie ((sdp->sd_flags1 & (FLG_SY1_HIDDEN | 129760758829Srie FLG_SY1_PROTECT)) == 0)))) { 12985aefb655Srie sym_undef_entry(ofl, sdp, UNDEF); 12997c478bd9Sstevel@tonic-gate ofl->ofl_flags |= undef; 13007c478bd9Sstevel@tonic-gate undeferr = 1; 13017c478bd9Sstevel@tonic-gate } 13027c478bd9Sstevel@tonic-gate 13037c478bd9Sstevel@tonic-gate } else { 13047c478bd9Sstevel@tonic-gate /* 13057c478bd9Sstevel@tonic-gate * For building things like shared objects (or anything 13067c478bd9Sstevel@tonic-gate * -znodefs), undefined symbols are allowed. 13077c478bd9Sstevel@tonic-gate * 13087c478bd9Sstevel@tonic-gate * If a mapfile reference remains undefined the user 13097c478bd9Sstevel@tonic-gate * would probably like a warning at least (they've 13107c478bd9Sstevel@tonic-gate * usually mis-spelt the reference). Refer to the above 13117c478bd9Sstevel@tonic-gate * comments for discussion on -u references, which 13127c478bd9Sstevel@tonic-gate * are not tested for in the same manner. 13137c478bd9Sstevel@tonic-gate */ 13147c478bd9Sstevel@tonic-gate if ((sdp->sd_flags & 13157c478bd9Sstevel@tonic-gate (FLG_SY_MAPREF | FLG_SY_MAPUSED)) == 13167c478bd9Sstevel@tonic-gate FLG_SY_MAPREF) { 13175aefb655Srie sym_undef_entry(ofl, sdp, UNDEF); 13187c478bd9Sstevel@tonic-gate ofl->ofl_flags |= FLG_OF_WARN; 13197c478bd9Sstevel@tonic-gate undeferr = 1; 13207c478bd9Sstevel@tonic-gate } 13217c478bd9Sstevel@tonic-gate } 13227c478bd9Sstevel@tonic-gate 13237c478bd9Sstevel@tonic-gate /* 13247c478bd9Sstevel@tonic-gate * If this symbol comes from a dependency mark the dependency 13257c478bd9Sstevel@tonic-gate * as required (-z ignore can result in unused dependencies 13267c478bd9Sstevel@tonic-gate * being dropped). If we need to record dependency versioning 13277c478bd9Sstevel@tonic-gate * information indicate what version of the needed shared object 13287c478bd9Sstevel@tonic-gate * this symbol is part of. Flag the symbol as undefined if it 13297c478bd9Sstevel@tonic-gate * has not been made available to us. 13307c478bd9Sstevel@tonic-gate */ 13317c478bd9Sstevel@tonic-gate if ((sdp->sd_ref == REF_DYN_NEED) && 13327c478bd9Sstevel@tonic-gate (!(sdp->sd_flags & FLG_SY_REFRSD))) { 13337c478bd9Sstevel@tonic-gate sdp->sd_file->ifl_flags |= FLG_IF_DEPREQD; 13347c478bd9Sstevel@tonic-gate 13357c478bd9Sstevel@tonic-gate /* 13367c478bd9Sstevel@tonic-gate * Capture that we've bound to a symbol that doesn't 13377c478bd9Sstevel@tonic-gate * allow being directly bound to. 13387c478bd9Sstevel@tonic-gate */ 13397c478bd9Sstevel@tonic-gate if (sdp->sd_flags1 & FLG_SY1_NDIR) 13407c478bd9Sstevel@tonic-gate ofl->ofl_flags1 |= FLG_OF1_NDIRECT; 13417c478bd9Sstevel@tonic-gate 13427c478bd9Sstevel@tonic-gate if (sdp->sd_file->ifl_vercnt) { 13437c478bd9Sstevel@tonic-gate int vndx; 134460758829Srie Ver_index *vip; 13457c478bd9Sstevel@tonic-gate 13467c478bd9Sstevel@tonic-gate vndx = sdp->sd_aux->sa_dverndx; 13477c478bd9Sstevel@tonic-gate vip = &sdp->sd_file->ifl_verndx[vndx]; 13487c478bd9Sstevel@tonic-gate if (vip->vi_flags & FLG_VER_AVAIL) { 13497c478bd9Sstevel@tonic-gate vip->vi_flags |= FLG_VER_REFER; 13507c478bd9Sstevel@tonic-gate } else { 13515aefb655Srie sym_undef_entry(ofl, sdp, NOTAVAIL); 13527c478bd9Sstevel@tonic-gate ofl->ofl_flags |= FLG_OF_FATAL; 13537c478bd9Sstevel@tonic-gate continue; 13547c478bd9Sstevel@tonic-gate } 13557c478bd9Sstevel@tonic-gate } 13567c478bd9Sstevel@tonic-gate } 13577c478bd9Sstevel@tonic-gate 13587c478bd9Sstevel@tonic-gate /* 13597c478bd9Sstevel@tonic-gate * Test that we do not bind to symbol supplied from an implicit 13607c478bd9Sstevel@tonic-gate * shared object. If a binding is from a weak reference it can 13617c478bd9Sstevel@tonic-gate * be ignored. 13627c478bd9Sstevel@tonic-gate */ 13637c478bd9Sstevel@tonic-gate if (needed && !undeferr && (sdp->sd_flags & FLG_SY_GLOBREF) && 13647c478bd9Sstevel@tonic-gate (sdp->sd_ref == REF_DYN_NEED) && 13657c478bd9Sstevel@tonic-gate (sdp->sd_flags & FLG_SY_NOTAVAIL)) { 13665aefb655Srie sym_undef_entry(ofl, sdp, IMPLICIT); 13677c478bd9Sstevel@tonic-gate ofl->ofl_flags |= needed; 13687c478bd9Sstevel@tonic-gate continue; 13697c478bd9Sstevel@tonic-gate } 13707c478bd9Sstevel@tonic-gate 13717c478bd9Sstevel@tonic-gate /* 13727c478bd9Sstevel@tonic-gate * Test that a symbol isn't going to be reduced to local scope 13737c478bd9Sstevel@tonic-gate * which actually wants to bind to a shared object - if so it's 13747c478bd9Sstevel@tonic-gate * a fatal error. 13757c478bd9Sstevel@tonic-gate */ 13767c478bd9Sstevel@tonic-gate if ((sdp->sd_ref == REF_DYN_NEED) && 137760758829Srie (sdp->sd_flags1 & (FLG_SY1_HIDDEN | FLG_SY1_PROTECT))) { 13785aefb655Srie sym_undef_entry(ofl, sdp, BNDLOCAL); 13797c478bd9Sstevel@tonic-gate ofl->ofl_flags |= FLG_OF_FATAL; 13807c478bd9Sstevel@tonic-gate continue; 13817c478bd9Sstevel@tonic-gate } 13827c478bd9Sstevel@tonic-gate 13837c478bd9Sstevel@tonic-gate /* 13847c478bd9Sstevel@tonic-gate * If the output image is to be versioned then all symbol 13857c478bd9Sstevel@tonic-gate * definitions must be associated with a version. 13867c478bd9Sstevel@tonic-gate */ 13877c478bd9Sstevel@tonic-gate if (verdesc && (sdp->sd_ref == REF_REL_NEED) && 13880bc07c75Srie (sym->st_shndx != SHN_UNDEF) && 138960758829Srie (!(sdp->sd_flags1 & FLG_SY1_HIDDEN)) && 13907c478bd9Sstevel@tonic-gate (sdp->sd_aux->sa_overndx == 0)) { 13915aefb655Srie sym_undef_entry(ofl, sdp, NOVERSION); 13927c478bd9Sstevel@tonic-gate ofl->ofl_flags |= verdesc; 13937c478bd9Sstevel@tonic-gate continue; 13947c478bd9Sstevel@tonic-gate } 13957c478bd9Sstevel@tonic-gate 13967c478bd9Sstevel@tonic-gate /* 13977c478bd9Sstevel@tonic-gate * If we don't need the symbol there's no need to process it 13987c478bd9Sstevel@tonic-gate * any further. 13997c478bd9Sstevel@tonic-gate */ 14007c478bd9Sstevel@tonic-gate if (sdp->sd_ref == REF_DYN_SEEN) 14017c478bd9Sstevel@tonic-gate continue; 14027c478bd9Sstevel@tonic-gate 14037c478bd9Sstevel@tonic-gate /* 14047c478bd9Sstevel@tonic-gate * Calculate the size and alignment requirements for the global 14057c478bd9Sstevel@tonic-gate * .bss and .tls sections. If we're building a relocatable 14067c478bd9Sstevel@tonic-gate * object only account for scoped COMMON symbols (these will 14077c478bd9Sstevel@tonic-gate * be converted to .bss references). 14087c478bd9Sstevel@tonic-gate * 140935450702SAli Bahrami * When -z nopartial is in effect, partially initialized 141035450702SAli Bahrami * symbols are directed to the special .data section 141135450702SAli Bahrami * created for that purpose (ofl->ofl_isparexpn). 141235450702SAli Bahrami * Otherwise, partially initialized symbols go to .bss. 14137c478bd9Sstevel@tonic-gate * 14147c478bd9Sstevel@tonic-gate * Also refer to make_mvsections() in sunwmove.c 14157c478bd9Sstevel@tonic-gate */ 14160bc07c75Srie if ((sym->st_shndx == SHN_COMMON) && 14170bc07c75Srie (((oflags & FLG_OF_RELOBJ) == 0) || 141860758829Srie ((sdp->sd_flags1 & FLG_SY1_HIDDEN) && 14197c478bd9Sstevel@tonic-gate (oflags & FLG_OF_PROCRED)))) { 142057ef7aa9SRod Evans if ((sdp->sd_move == NULL) || 142135450702SAli Bahrami ((sdp->sd_flags & FLG_SY_PAREXPN) == 0)) { 14227c478bd9Sstevel@tonic-gate Xword * size, * align; 14237c478bd9Sstevel@tonic-gate 1424d579eb63Sab if (type != STT_TLS) { 14257c478bd9Sstevel@tonic-gate size = &bsssize; 14267c478bd9Sstevel@tonic-gate align = &bssalign; 14277c478bd9Sstevel@tonic-gate } else { 14287c478bd9Sstevel@tonic-gate size = &tlssize; 14297c478bd9Sstevel@tonic-gate align = &tlsalign; 14307c478bd9Sstevel@tonic-gate } 14317c478bd9Sstevel@tonic-gate *size = (Xword)S_ROUND(*size, sym->st_value) + 1432dd94ecefSrie sym->st_size; 14337c478bd9Sstevel@tonic-gate if (sym->st_value > *align) 14347c478bd9Sstevel@tonic-gate *align = sym->st_value; 14357c478bd9Sstevel@tonic-gate } 14367c478bd9Sstevel@tonic-gate } 14377c478bd9Sstevel@tonic-gate 1438ba2be530Sab #if defined(_ELF64) 143954d82594Sseizo /* 144054d82594Sseizo * Calculate the size and alignment requirement for the global 144154d82594Sseizo * .lbss. TLS or partially initialized symbols do not need to be 144254d82594Sseizo * considered yet. 144354d82594Sseizo */ 1444ba2be530Sab if ((ld_targ.t_m.m_mach == EM_AMD64) && 1445ba2be530Sab (sym->st_shndx == SHN_X86_64_LCOMMON)) { 144654d82594Sseizo lbsssize = (Xword)S_ROUND(lbsssize, sym->st_value) + 144733eb6ee1Sab sym->st_size; 144854d82594Sseizo if (sym->st_value > lbssalign) 144954d82594Sseizo lbssalign = sym->st_value; 145054d82594Sseizo } 145154d82594Sseizo #endif 145254d82594Sseizo 14537c478bd9Sstevel@tonic-gate /* 14547c478bd9Sstevel@tonic-gate * If a symbol was referenced via the command line 14557c478bd9Sstevel@tonic-gate * (ld -u <>, ...), then this counts as a reference against the 14567c478bd9Sstevel@tonic-gate * symbol. Mark any section that symbol is defined in. 14577c478bd9Sstevel@tonic-gate */ 14587c478bd9Sstevel@tonic-gate if (((isp = sdp->sd_isc) != 0) && 14597c478bd9Sstevel@tonic-gate (sdp->sd_flags & FLG_SY_CMDREF)) { 14607c478bd9Sstevel@tonic-gate isp->is_flags |= FLG_IS_SECTREF; 14617c478bd9Sstevel@tonic-gate isp->is_file->ifl_flags |= FLG_IF_FILEREF; 14627c478bd9Sstevel@tonic-gate } 14637c478bd9Sstevel@tonic-gate 14647c478bd9Sstevel@tonic-gate /* 14657c478bd9Sstevel@tonic-gate * Update the symbol count and the associated name string size. 14667c478bd9Sstevel@tonic-gate */ 1467d4517e84Srie if ((sdp->sd_flags1 & FLG_SY1_HIDDEN) && 14687c478bd9Sstevel@tonic-gate (oflags & FLG_OF_PROCRED)) { 14697c478bd9Sstevel@tonic-gate /* 147060758829Srie * If any reductions are being processed, keep a count 147160758829Srie * of eliminated symbols, and if the symbol is being 147260758829Srie * reduced to local, count it's size for the .symtab. 14737c478bd9Sstevel@tonic-gate */ 14747c478bd9Sstevel@tonic-gate if (sdp->sd_flags1 & FLG_SY1_ELIM) { 14757c478bd9Sstevel@tonic-gate ofl->ofl_elimcnt++; 14767c478bd9Sstevel@tonic-gate } else { 14777c478bd9Sstevel@tonic-gate ofl->ofl_scopecnt++; 14787c478bd9Sstevel@tonic-gate if ((((sdp->sd_flags & FLG_SY_REGSYM) == 0) || 14797c478bd9Sstevel@tonic-gate sym->st_name) && (st_insert(ofl->ofl_strtab, 14807c478bd9Sstevel@tonic-gate sdp->sd_name) == -1)) 14817c478bd9Sstevel@tonic-gate return (S_ERROR); 14829039eeafSab if (allow_ldynsym && sym->st_name && 1483d579eb63Sab ldynsym_symtype[type]) { 14849039eeafSab ofl->ofl_dynscopecnt++; 14859039eeafSab if (st_insert(ofl->ofl_dynstrtab, 14869039eeafSab sdp->sd_name) == -1) 14879039eeafSab return (S_ERROR); 1488d579eb63Sab /* Include it in sort section? */ 1489d579eb63Sab DYNSORT_COUNT(sdp, sym, type, ++); 14909039eeafSab } 14917c478bd9Sstevel@tonic-gate } 14927c478bd9Sstevel@tonic-gate } else { 14937c478bd9Sstevel@tonic-gate ofl->ofl_globcnt++; 14947c478bd9Sstevel@tonic-gate 1495d579eb63Sab /* 1496d579eb63Sab * Check to see if this global variable should 1497d579eb63Sab * go into a sort section. Sort sections require 1498d579eb63Sab * a .SUNW_ldynsym section, so, don't check 1499d579eb63Sab * unless a .SUNW_ldynsym is allowed. 1500d579eb63Sab */ 1501d579eb63Sab if (allow_ldynsym) { 1502d579eb63Sab DYNSORT_COUNT(sdp, sym, type, ++); 1503d579eb63Sab } 1504d579eb63Sab 15057c478bd9Sstevel@tonic-gate /* 15067c478bd9Sstevel@tonic-gate * If global direct bindings are in effect, or this 15077c478bd9Sstevel@tonic-gate * symbol has bound to a dependency which was specified 15087c478bd9Sstevel@tonic-gate * as requiring direct bindings, and it hasn't 15097c478bd9Sstevel@tonic-gate * explicitly been defined as a non-direct binding 15107c478bd9Sstevel@tonic-gate * symbol, mark it. 15117c478bd9Sstevel@tonic-gate */ 15127c478bd9Sstevel@tonic-gate if (((ofl->ofl_dtflags_1 & DF_1_DIRECT) || (isp && 15137c478bd9Sstevel@tonic-gate (isp->is_file->ifl_flags & FLG_IF_DIRECT))) && 15147c478bd9Sstevel@tonic-gate ((sdp->sd_flags1 & FLG_SY1_NDIR) == 0)) 15157c478bd9Sstevel@tonic-gate sdp->sd_flags1 |= FLG_SY1_DIR; 15167c478bd9Sstevel@tonic-gate 15177c478bd9Sstevel@tonic-gate /* 15187c478bd9Sstevel@tonic-gate * Insert the symbol name. 15197c478bd9Sstevel@tonic-gate */ 15207c478bd9Sstevel@tonic-gate if (((sdp->sd_flags & FLG_SY_REGSYM) == 0) || 15217c478bd9Sstevel@tonic-gate sym->st_name) { 15227c478bd9Sstevel@tonic-gate if (st_insert(ofl->ofl_strtab, 15237c478bd9Sstevel@tonic-gate sdp->sd_name) == -1) 15247c478bd9Sstevel@tonic-gate return (S_ERROR); 15257c478bd9Sstevel@tonic-gate 15267c478bd9Sstevel@tonic-gate if (!(ofl->ofl_flags & FLG_OF_RELOBJ) && 15277c478bd9Sstevel@tonic-gate (st_insert(ofl->ofl_dynstrtab, 15287c478bd9Sstevel@tonic-gate sdp->sd_name) == -1)) 15297c478bd9Sstevel@tonic-gate return (S_ERROR); 15307c478bd9Sstevel@tonic-gate } 15317c478bd9Sstevel@tonic-gate 15327c478bd9Sstevel@tonic-gate /* 15337c478bd9Sstevel@tonic-gate * If this section offers a global symbol - record that 15347c478bd9Sstevel@tonic-gate * fact. 15357c478bd9Sstevel@tonic-gate */ 15367c478bd9Sstevel@tonic-gate if (isp) { 15377c478bd9Sstevel@tonic-gate isp->is_flags |= FLG_IS_SECTREF; 15387c478bd9Sstevel@tonic-gate isp->is_file->ifl_flags |= FLG_IF_FILEREF; 15397c478bd9Sstevel@tonic-gate } 15407c478bd9Sstevel@tonic-gate } 15417c478bd9Sstevel@tonic-gate } 15427c478bd9Sstevel@tonic-gate 15437c478bd9Sstevel@tonic-gate /* 15447c478bd9Sstevel@tonic-gate * If we've encountered a fatal error during symbol validation then 15457c478bd9Sstevel@tonic-gate * return now. 15467c478bd9Sstevel@tonic-gate */ 15477c478bd9Sstevel@tonic-gate if (ofl->ofl_flags & FLG_OF_FATAL) 15487c478bd9Sstevel@tonic-gate return (1); 15497c478bd9Sstevel@tonic-gate 15507c478bd9Sstevel@tonic-gate /* 15517c478bd9Sstevel@tonic-gate * Now that symbol resolution is completed, scan any register symbols. 15527c478bd9Sstevel@tonic-gate * From now on, we're only interested in those that contribute to the 15537c478bd9Sstevel@tonic-gate * output file. 15547c478bd9Sstevel@tonic-gate */ 15557c478bd9Sstevel@tonic-gate if (ofl->ofl_regsyms) { 15567c478bd9Sstevel@tonic-gate int ndx; 15577c478bd9Sstevel@tonic-gate 15587c478bd9Sstevel@tonic-gate for (ndx = 0; ndx < ofl->ofl_regsymsno; ndx++) { 15596b3ba5bdSAli Bahrami if ((sdp = ofl->ofl_regsyms[ndx]) == NULL) 15607c478bd9Sstevel@tonic-gate continue; 15617c478bd9Sstevel@tonic-gate if (sdp->sd_ref != REF_REL_NEED) { 15626b3ba5bdSAli Bahrami ofl->ofl_regsyms[ndx] = NULL; 15637c478bd9Sstevel@tonic-gate continue; 15647c478bd9Sstevel@tonic-gate } 15657c478bd9Sstevel@tonic-gate 15667c478bd9Sstevel@tonic-gate ofl->ofl_regsymcnt++; 15677c478bd9Sstevel@tonic-gate if (sdp->sd_sym->st_name == 0) 15687c478bd9Sstevel@tonic-gate sdp->sd_name = MSG_ORIG(MSG_STR_EMPTY); 15697c478bd9Sstevel@tonic-gate 157060758829Srie if ((sdp->sd_flags1 & FLG_SY1_HIDDEN) || 15717c478bd9Sstevel@tonic-gate (ELF_ST_BIND(sdp->sd_sym->st_info) == STB_LOCAL)) 15727c478bd9Sstevel@tonic-gate ofl->ofl_lregsymcnt++; 15737c478bd9Sstevel@tonic-gate } 15747c478bd9Sstevel@tonic-gate } 15757c478bd9Sstevel@tonic-gate 15767c478bd9Sstevel@tonic-gate /* 15777c478bd9Sstevel@tonic-gate * Generate the .bss section now that we know its size and alignment. 15787c478bd9Sstevel@tonic-gate */ 157957ef7aa9SRod Evans if (bsssize) { 158057ef7aa9SRod Evans if (ld_make_bss(ofl, bsssize, bssalign, 158157ef7aa9SRod Evans ld_targ.t_id.id_bss) == S_ERROR) 15827c478bd9Sstevel@tonic-gate return (S_ERROR); 15837c478bd9Sstevel@tonic-gate } 15847c478bd9Sstevel@tonic-gate if (tlssize) { 158557ef7aa9SRod Evans if (ld_make_bss(ofl, tlssize, tlsalign, 158657ef7aa9SRod Evans ld_targ.t_id.id_tlsbss) == S_ERROR) 158754d82594Sseizo return (S_ERROR); 158854d82594Sseizo } 1589ba2be530Sab #if defined(_ELF64) 1590ba2be530Sab if ((ld_targ.t_m.m_mach == EM_AMD64) && 1591ba2be530Sab lbsssize && !(oflags & FLG_OF_RELOBJ)) { 159257ef7aa9SRod Evans if (ld_make_bss(ofl, lbsssize, lbssalign, 159357ef7aa9SRod Evans ld_targ.t_id.id_lbss) == S_ERROR) 15947c478bd9Sstevel@tonic-gate return (S_ERROR); 15957c478bd9Sstevel@tonic-gate } 159654d82594Sseizo #endif 15977c478bd9Sstevel@tonic-gate /* 15987c478bd9Sstevel@tonic-gate * Determine what entry point symbol we need, and if found save its 15997c478bd9Sstevel@tonic-gate * symbol descriptor so that we can update the ELF header entry with the 16007c478bd9Sstevel@tonic-gate * symbols value later (see update_oehdr). Make sure the symbol is 1601c1c6f601Srie * tagged to ensure its update in case -s is in effect. Use any -e 16027c478bd9Sstevel@tonic-gate * option first, or the default entry points `_start' and `main'. 16037c478bd9Sstevel@tonic-gate */ 1604c1c6f601Srie ret = 0; 16057c478bd9Sstevel@tonic-gate if (ofl->ofl_entry) { 16061d1fba8aSrie if ((sdp = 16071d1fba8aSrie ld_sym_find(ofl->ofl_entry, SYM_NOHASH, 0, ofl)) == NULL) { 16081d1fba8aSrie eprintf(ofl->ofl_lml, ERR_FATAL, 16091d1fba8aSrie MSG_INTL(MSG_ARG_NOENTRY), ofl->ofl_entry); 16101d1fba8aSrie ret++; 16111d1fba8aSrie } else if (ensure_sym_local(ofl, sdp, 16121d1fba8aSrie MSG_INTL(MSG_SYM_ENTRY)) != 0) { 1613c1c6f601Srie ret++; 16141d1fba8aSrie } else { 16151d1fba8aSrie ofl->ofl_entry = (void *)sdp; 16167c478bd9Sstevel@tonic-gate } 16175aefb655Srie } else if (((sdp = ld_sym_find(MSG_ORIG(MSG_SYM_START), 1618c1c6f601Srie SYM_NOHASH, 0, ofl)) != NULL) && (ensure_sym_local(ofl, 1619c1c6f601Srie sdp, 0) == 0)) { 16207c478bd9Sstevel@tonic-gate ofl->ofl_entry = (void *)sdp; 1621c1c6f601Srie 16225aefb655Srie } else if (((sdp = ld_sym_find(MSG_ORIG(MSG_SYM_MAIN), 1623c1c6f601Srie SYM_NOHASH, 0, ofl)) != NULL) && (ensure_sym_local(ofl, 1624c1c6f601Srie sdp, 0) == 0)) { 16257c478bd9Sstevel@tonic-gate ofl->ofl_entry = (void *)sdp; 16267c478bd9Sstevel@tonic-gate } 16277c478bd9Sstevel@tonic-gate 16287c478bd9Sstevel@tonic-gate /* 1629c1c6f601Srie * If ld -zdtrace=<sym> was given, then validate that the symbol is 1630c1c6f601Srie * defined within the current object being built. 16317c478bd9Sstevel@tonic-gate */ 16321d1fba8aSrie if ((sdp = ofl->ofl_dtracesym) != 0) 1633c1c6f601Srie ret += ensure_sym_local(ofl, sdp, MSG_ORIG(MSG_STR_DTRACE)); 16347c478bd9Sstevel@tonic-gate 1635c1c6f601Srie /* 1636c1c6f601Srie * If any initarray, finiarray or preinitarray functions have been 1637c1c6f601Srie * requested, make sure they are defined within the current object 1638c1c6f601Srie * being built. 1639c1c6f601Srie */ 164057ef7aa9SRod Evans if (ofl->ofl_initarray) { 164157ef7aa9SRod Evans ret += ensure_array_local(ofl, ofl->ofl_initarray, 1642c1c6f601Srie MSG_ORIG(MSG_SYM_INITARRAY)); 1643c1c6f601Srie } 164457ef7aa9SRod Evans if (ofl->ofl_finiarray) { 164557ef7aa9SRod Evans ret += ensure_array_local(ofl, ofl->ofl_finiarray, 1646c1c6f601Srie MSG_ORIG(MSG_SYM_FINIARRAY)); 1647c1c6f601Srie } 164857ef7aa9SRod Evans if (ofl->ofl_preiarray) { 164957ef7aa9SRod Evans ret += ensure_array_local(ofl, ofl->ofl_preiarray, 1650c1c6f601Srie MSG_ORIG(MSG_SYM_PREINITARRAY)); 1651c1c6f601Srie } 1652c1c6f601Srie 1653c1c6f601Srie if (ret) 1654c1c6f601Srie return (S_ERROR); 1655c1c6f601Srie 16567c478bd9Sstevel@tonic-gate /* 16577c478bd9Sstevel@tonic-gate * If we're required to record any needed dependencies versioning 16587c478bd9Sstevel@tonic-gate * information calculate it now that all symbols have been validated. 16597c478bd9Sstevel@tonic-gate */ 16607c478bd9Sstevel@tonic-gate if ((oflags & (FLG_OF_VERNEED | FLG_OF_NOVERSEC)) == FLG_OF_VERNEED) 16615aefb655Srie return (ld_vers_check_need(ofl)); 16627c478bd9Sstevel@tonic-gate else 16637c478bd9Sstevel@tonic-gate return (1); 16647c478bd9Sstevel@tonic-gate } 16657c478bd9Sstevel@tonic-gate 16667c478bd9Sstevel@tonic-gate /* 16677c478bd9Sstevel@tonic-gate * qsort(3c) comparison function. As an optimization for associating weak 16687c478bd9Sstevel@tonic-gate * symbols to their strong counterparts sort global symbols according to their 16696b3ba5bdSAli Bahrami * section index, address and binding. 16707c478bd9Sstevel@tonic-gate */ 16717c478bd9Sstevel@tonic-gate static int 16726b3ba5bdSAli Bahrami compare(const void *sdpp1, const void *sdpp2) 16737c478bd9Sstevel@tonic-gate { 16746b3ba5bdSAli Bahrami Sym_desc *sdp1 = *((Sym_desc **)sdpp1); 16756b3ba5bdSAli Bahrami Sym_desc *sdp2 = *((Sym_desc **)sdpp2); 16766b3ba5bdSAli Bahrami Sym *sym1, *sym2; 16777c478bd9Sstevel@tonic-gate uchar_t bind1, bind2; 16787c478bd9Sstevel@tonic-gate 16797c478bd9Sstevel@tonic-gate /* 16807c478bd9Sstevel@tonic-gate * Symbol descriptors may be zero, move these to the front of the 16817c478bd9Sstevel@tonic-gate * sorted array. 16827c478bd9Sstevel@tonic-gate */ 16836b3ba5bdSAli Bahrami if (sdp1 == NULL) 16847c478bd9Sstevel@tonic-gate return (-1); 16856b3ba5bdSAli Bahrami if (sdp2 == NULL) 16867c478bd9Sstevel@tonic-gate return (1); 16877c478bd9Sstevel@tonic-gate 16887c478bd9Sstevel@tonic-gate sym1 = sdp1->sd_sym; 16897c478bd9Sstevel@tonic-gate sym2 = sdp2->sd_sym; 16907c478bd9Sstevel@tonic-gate 16916b3ba5bdSAli Bahrami /* 16926b3ba5bdSAli Bahrami * Compare the symbols section index. This is important when sorting 16936b3ba5bdSAli Bahrami * the symbol tables of relocatable objects. In this case, a symbols 16946b3ba5bdSAli Bahrami * value is the offset within the associated section, and thus many 16956b3ba5bdSAli Bahrami * symbols can have the same value, but are effectively different 16966b3ba5bdSAli Bahrami * addresses. 16976b3ba5bdSAli Bahrami */ 16986b3ba5bdSAli Bahrami if (sym1->st_shndx > sym2->st_shndx) 16996b3ba5bdSAli Bahrami return (1); 17006b3ba5bdSAli Bahrami if (sym1->st_shndx < sym2->st_shndx) 17016b3ba5bdSAli Bahrami return (-1); 17026b3ba5bdSAli Bahrami 17037c478bd9Sstevel@tonic-gate /* 17047c478bd9Sstevel@tonic-gate * Compare the symbols value (address). 17057c478bd9Sstevel@tonic-gate */ 17067c478bd9Sstevel@tonic-gate if (sym1->st_value > sym2->st_value) 17077c478bd9Sstevel@tonic-gate return (1); 17087c478bd9Sstevel@tonic-gate if (sym1->st_value < sym2->st_value) 17097c478bd9Sstevel@tonic-gate return (-1); 17107c478bd9Sstevel@tonic-gate 17117c478bd9Sstevel@tonic-gate bind1 = ELF_ST_BIND(sym1->st_info); 17127c478bd9Sstevel@tonic-gate bind2 = ELF_ST_BIND(sym2->st_info); 17137c478bd9Sstevel@tonic-gate 17147c478bd9Sstevel@tonic-gate /* 17157c478bd9Sstevel@tonic-gate * If two symbols have the same address place the weak symbol before 17167c478bd9Sstevel@tonic-gate * any strong counterpart. 17177c478bd9Sstevel@tonic-gate */ 17187c478bd9Sstevel@tonic-gate if (bind1 > bind2) 17197c478bd9Sstevel@tonic-gate return (-1); 17207c478bd9Sstevel@tonic-gate if (bind1 < bind2) 17217c478bd9Sstevel@tonic-gate return (1); 17227c478bd9Sstevel@tonic-gate 17237c478bd9Sstevel@tonic-gate return (0); 17247c478bd9Sstevel@tonic-gate } 17257c478bd9Sstevel@tonic-gate 172669a0bf0cSab /* 172769a0bf0cSab * Issue a MSG_SYM_BADADDR error from ld_sym_process(). This error 172869a0bf0cSab * is issued when a symbol address/size is not contained by the 172969a0bf0cSab * target section. 173069a0bf0cSab * 173169a0bf0cSab * Such objects are at least partially corrupt, and the user would 173269a0bf0cSab * be well advised to be skeptical of them, and to ask their compiler 173369a0bf0cSab * supplier to fix the problem. However, a distinction needs to be 173469a0bf0cSab * made between symbols that reference readonly text, and those that 173569a0bf0cSab * access writable data. Other than throwing off profiling results, 173669a0bf0cSab * the readonly section case is less serious. We have encountered 173769a0bf0cSab * such objects in the field. In order to allow existing objects 173869a0bf0cSab * to continue working, we issue a warning rather than a fatal error 173969a0bf0cSab * if the symbol is against readonly text. Other cases are fatal. 174069a0bf0cSab */ 174169a0bf0cSab static void 174269a0bf0cSab issue_badaddr_msg(Ifl_desc *ifl, Ofl_desc *ofl, Sym_desc *sdp, 174369a0bf0cSab Sym *sym, Word shndx) 174469a0bf0cSab { 17451d9df23bSab ofl_flag_t flag; 17461d9df23bSab Error err; 17471d9df23bSab const char *msg; 174869a0bf0cSab 174969a0bf0cSab if ((sdp->sd_isc->is_shdr->sh_flags & (SHF_WRITE | SHF_ALLOC)) == 175069a0bf0cSab SHF_ALLOC) { 175169a0bf0cSab msg = MSG_INTL(MSG_SYM_BADADDR_ROTXT); 175269a0bf0cSab flag = FLG_OF_WARN; 175369a0bf0cSab err = ERR_WARNING; 175469a0bf0cSab } else { 175569a0bf0cSab msg = MSG_INTL(MSG_SYM_BADADDR); 175669a0bf0cSab flag = FLG_OF_FATAL; 175769a0bf0cSab err = ERR_FATAL; 175869a0bf0cSab } 175969a0bf0cSab 176069a0bf0cSab eprintf(ofl->ofl_lml, err, msg, demangle(sdp->sd_name), 176169a0bf0cSab ifl->ifl_name, shndx, sdp->sd_isc->is_name, 176269a0bf0cSab EC_XWORD(sdp->sd_isc->is_shdr->sh_size), 176369a0bf0cSab EC_XWORD(sym->st_value), EC_XWORD(sym->st_size)); 176469a0bf0cSab ofl->ofl_flags |= flag; 176569a0bf0cSab } 176669a0bf0cSab 176769a0bf0cSab 17687c478bd9Sstevel@tonic-gate /* 17697c478bd9Sstevel@tonic-gate * Process the symbol table for the specified input file. At this point all 17707c478bd9Sstevel@tonic-gate * input sections from this input file have been assigned an input section 17717c478bd9Sstevel@tonic-gate * descriptor which is saved in the `ifl_isdesc' array. 17727c478bd9Sstevel@tonic-gate * 17736b3ba5bdSAli Bahrami * - local symbols are saved (as is) if the input file is a 17747c478bd9Sstevel@tonic-gate * relocatable object 17757c478bd9Sstevel@tonic-gate * 17766b3ba5bdSAli Bahrami * - global symbols are added to the linkers internal symbol 17777c478bd9Sstevel@tonic-gate * table if they are not already present, otherwise a symbol 17787c478bd9Sstevel@tonic-gate * resolution function is called upon to resolve the conflict. 17797c478bd9Sstevel@tonic-gate */ 17807c478bd9Sstevel@tonic-gate uintptr_t 17815aefb655Srie ld_sym_process(Is_desc *isc, Ifl_desc *ifl, Ofl_desc *ofl) 17827c478bd9Sstevel@tonic-gate { 178375e45495Sab /* 178475e45495Sab * This macro tests the given symbol to see if it is out of 178575e45495Sab * range relative to the section it references. 178675e45495Sab * 178775e45495Sab * entry: 178875e45495Sab * - ifl is a relative object (ET_REL) 178975e45495Sab * _sdp - Symbol descriptor 179075e45495Sab * _sym - Symbol 179175e45495Sab * _type - Symbol type 179275e45495Sab * 179375e45495Sab * The following are tested: 179475e45495Sab * - Symbol length is non-zero 179575e45495Sab * - Symbol type is a type that references code or data 179675e45495Sab * - Referenced section is not 0 (indicates an UNDEF symbol) 179775e45495Sab * and is not in the range of special values above SHN_LORESERVE 179875e45495Sab * (excluding SHN_XINDEX, which is OK). 179975e45495Sab * - We have a valid section header for the target section 180075e45495Sab * 180175e45495Sab * If the above are all true, and the symbol position is not 180275e45495Sab * contained by the target section, this macro evaluates to 180375e45495Sab * True (1). Otherwise, False(0). 180475e45495Sab */ 180575e45495Sab #define SYM_LOC_BADADDR(_sdp, _sym, _type) \ 1806d579eb63Sab (_sym->st_size && dynsymsort_symtype[_type] && \ 180775e45495Sab (_sym->st_shndx != SHN_UNDEF) && \ 180875e45495Sab ((_sym->st_shndx < SHN_LORESERVE) || \ 180975e45495Sab (_sym->st_shndx == SHN_XINDEX)) && \ 181075e45495Sab _sdp->sd_isc && _sdp->sd_isc->is_shdr && \ 181175e45495Sab ((_sym->st_value + _sym->st_size) > _sdp->sd_isc->is_shdr->sh_size)) 181275e45495Sab 1813de777a60Sab Conv_inv_buf_t inv_buf; 18147c478bd9Sstevel@tonic-gate Sym *sym = (Sym *)isc->is_indata->d_buf; 18156b3ba5bdSAli Bahrami Word *symshndx = NULL; 18167c478bd9Sstevel@tonic-gate Shdr *shdr = isc->is_shdr; 18177c478bd9Sstevel@tonic-gate Sym_desc *sdp; 18187c478bd9Sstevel@tonic-gate size_t strsize; 18197c478bd9Sstevel@tonic-gate char *strs; 18207c478bd9Sstevel@tonic-gate uchar_t type, bind; 18217c478bd9Sstevel@tonic-gate Word ndx, hash, local, total; 18224f680cc6SAli Bahrami uchar_t osabi = ifl->ifl_ehdr->e_ident[EI_OSABI]; 18234f680cc6SAli Bahrami Half mach = ifl->ifl_ehdr->e_machine; 18247c478bd9Sstevel@tonic-gate Half etype = ifl->ifl_ehdr->e_type; 182575e45495Sab int etype_rel; 18267c478bd9Sstevel@tonic-gate const char *symsecname, *strsecname; 1827*4a8d0ea7SAli Bahrami Word symsecndx; 18287c478bd9Sstevel@tonic-gate avl_index_t where; 18296b3ba5bdSAli Bahrami int test_gnu_hidden_bit, weak; 18307c478bd9Sstevel@tonic-gate 18317c478bd9Sstevel@tonic-gate /* 18327c478bd9Sstevel@tonic-gate * Its possible that a file may contain more that one symbol table, 18337c478bd9Sstevel@tonic-gate * ie. .dynsym and .symtab in a shared library. Only process the first 18347c478bd9Sstevel@tonic-gate * table (here, we assume .dynsym comes before .symtab). 18357c478bd9Sstevel@tonic-gate */ 18367c478bd9Sstevel@tonic-gate if (ifl->ifl_symscnt) 18377c478bd9Sstevel@tonic-gate return (1); 18387c478bd9Sstevel@tonic-gate 18397c478bd9Sstevel@tonic-gate if (isc->is_symshndx) 18407c478bd9Sstevel@tonic-gate symshndx = isc->is_symshndx->is_indata->d_buf; 18417c478bd9Sstevel@tonic-gate 18425aefb655Srie DBG_CALL(Dbg_syms_process(ofl->ofl_lml, ifl)); 18437c478bd9Sstevel@tonic-gate 1844*4a8d0ea7SAli Bahrami symsecndx = isc->is_scnndx; 18457c478bd9Sstevel@tonic-gate if (isc->is_name) 18467c478bd9Sstevel@tonic-gate symsecname = isc->is_name; 18477c478bd9Sstevel@tonic-gate else 18487c478bd9Sstevel@tonic-gate symsecname = MSG_ORIG(MSG_STR_EMPTY); 18497c478bd9Sstevel@tonic-gate 18507c478bd9Sstevel@tonic-gate /* 18517c478bd9Sstevel@tonic-gate * From the symbol tables section header information determine which 18527c478bd9Sstevel@tonic-gate * strtab table is needed to locate the actual symbol names. 18537c478bd9Sstevel@tonic-gate */ 18547c478bd9Sstevel@tonic-gate if (ifl->ifl_flags & FLG_IF_HSTRTAB) { 18557c478bd9Sstevel@tonic-gate ndx = shdr->sh_link; 18567c478bd9Sstevel@tonic-gate if ((ndx == 0) || (ndx >= ifl->ifl_shnum)) { 18575aefb655Srie eprintf(ofl->ofl_lml, ERR_FATAL, 1858*4a8d0ea7SAli Bahrami MSG_INTL(MSG_FIL_INVSHLINK), ifl->ifl_name, 1859*4a8d0ea7SAli Bahrami EC_WORD(symsecndx), symsecname, EC_XWORD(ndx)); 18607c478bd9Sstevel@tonic-gate return (S_ERROR); 18617c478bd9Sstevel@tonic-gate } 18627c478bd9Sstevel@tonic-gate strsize = ifl->ifl_isdesc[ndx]->is_shdr->sh_size; 18637c478bd9Sstevel@tonic-gate strs = ifl->ifl_isdesc[ndx]->is_indata->d_buf; 18647c478bd9Sstevel@tonic-gate if (ifl->ifl_isdesc[ndx]->is_name) 18657c478bd9Sstevel@tonic-gate strsecname = ifl->ifl_isdesc[ndx]->is_name; 18667c478bd9Sstevel@tonic-gate else 18677c478bd9Sstevel@tonic-gate strsecname = MSG_ORIG(MSG_STR_EMPTY); 18687c478bd9Sstevel@tonic-gate } else { 18697c478bd9Sstevel@tonic-gate /* 18707c478bd9Sstevel@tonic-gate * There is no string table section in this input file 18717c478bd9Sstevel@tonic-gate * although there are symbols in this symbol table section. 18727c478bd9Sstevel@tonic-gate * This means that these symbols do not have names. 18737c478bd9Sstevel@tonic-gate * Currently, only scratch register symbols are allowed 18747c478bd9Sstevel@tonic-gate * not to have names. 18757c478bd9Sstevel@tonic-gate */ 18767c478bd9Sstevel@tonic-gate strsize = 0; 18777c478bd9Sstevel@tonic-gate strs = (char *)MSG_ORIG(MSG_STR_EMPTY); 18787c478bd9Sstevel@tonic-gate strsecname = MSG_ORIG(MSG_STR_EMPTY); 18797c478bd9Sstevel@tonic-gate } 18807c478bd9Sstevel@tonic-gate 18817c478bd9Sstevel@tonic-gate /* 18827c478bd9Sstevel@tonic-gate * Determine the number of local symbols together with the total 18837c478bd9Sstevel@tonic-gate * number we have to process. 18847c478bd9Sstevel@tonic-gate */ 18857c478bd9Sstevel@tonic-gate total = (Word)(shdr->sh_size / shdr->sh_entsize); 18867c478bd9Sstevel@tonic-gate local = shdr->sh_info; 18877c478bd9Sstevel@tonic-gate 18887c478bd9Sstevel@tonic-gate /* 18897c478bd9Sstevel@tonic-gate * Allocate a symbol table index array and a local symbol array 18907c478bd9Sstevel@tonic-gate * (global symbols are processed and added to the ofl->ofl_symbkt[] 18917c478bd9Sstevel@tonic-gate * array). If we are dealing with a relocatable object, allocate the 18927c478bd9Sstevel@tonic-gate * local symbol descriptors. If this isn't a relocatable object we 18937c478bd9Sstevel@tonic-gate * still have to process any shared object locals to determine if any 18947c478bd9Sstevel@tonic-gate * register symbols exist. Although these aren't added to the output 18957c478bd9Sstevel@tonic-gate * image, they are used as part of symbol resolution. 18967c478bd9Sstevel@tonic-gate */ 18977c478bd9Sstevel@tonic-gate if ((ifl->ifl_oldndx = libld_malloc((size_t)(total * 18986b3ba5bdSAli Bahrami sizeof (Sym_desc *)))) == NULL) 18997c478bd9Sstevel@tonic-gate return (S_ERROR); 1900d579eb63Sab etype_rel = (etype == ET_REL); 190175e45495Sab if (etype_rel && local) { 19027c478bd9Sstevel@tonic-gate if ((ifl->ifl_locs = 19036b3ba5bdSAli Bahrami libld_calloc(sizeof (Sym_desc), local)) == NULL) 19047c478bd9Sstevel@tonic-gate return (S_ERROR); 19057c478bd9Sstevel@tonic-gate /* LINTED */ 19067c478bd9Sstevel@tonic-gate ifl->ifl_locscnt = (Word)local; 19077c478bd9Sstevel@tonic-gate } 19087c478bd9Sstevel@tonic-gate ifl->ifl_symscnt = total; 19097c478bd9Sstevel@tonic-gate 19107c478bd9Sstevel@tonic-gate /* 19117c478bd9Sstevel@tonic-gate * If there are local symbols to save add them to the symbol table 19127c478bd9Sstevel@tonic-gate * index array. 19137c478bd9Sstevel@tonic-gate */ 19147c478bd9Sstevel@tonic-gate if (local) { 191524b9abbaSab int allow_ldynsym = OFL_ALLOW_LDYNSYM(ofl); 191624b9abbaSab Sym_desc *last_file_sdp = NULL; 191724b9abbaSab int last_file_ndx = 0; 191824b9abbaSab 19197c478bd9Sstevel@tonic-gate for (sym++, ndx = 1; ndx < local; sym++, ndx++) { 19207c478bd9Sstevel@tonic-gate Word shndx, sdflags = FLG_SY_CLEAN; 19217c478bd9Sstevel@tonic-gate const char *name; 19227c478bd9Sstevel@tonic-gate Sym_desc *rsdp; 1923ba2be530Sab int shndx_bad = 0; 19241da7e599SAli Bahrami int symtab_enter = 1; 19257c478bd9Sstevel@tonic-gate 19267c478bd9Sstevel@tonic-gate /* 1927ba2be530Sab * Determine and validate the associated section index. 19287c478bd9Sstevel@tonic-gate */ 1929ba2be530Sab if (symshndx && (sym->st_shndx == SHN_XINDEX)) { 19307c478bd9Sstevel@tonic-gate shndx = symshndx[ndx]; 1931ba2be530Sab } else if ((shndx = sym->st_shndx) >= SHN_LORESERVE) { 19327c478bd9Sstevel@tonic-gate sdflags |= FLG_SY_SPECSEC; 1933ba2be530Sab } else if (shndx > ifl->ifl_ehdr->e_shnum) { 1934ba2be530Sab /* We need the name before we can issue error */ 1935ba2be530Sab shndx_bad = 1; 1936ba2be530Sab } 19377c478bd9Sstevel@tonic-gate 19387c478bd9Sstevel@tonic-gate /* 19397c478bd9Sstevel@tonic-gate * Check if st_name has a valid value or not. 19407c478bd9Sstevel@tonic-gate */ 19415aefb655Srie if ((name = string(ofl, ifl, sym, strs, strsize, ndx, 1942*4a8d0ea7SAli Bahrami shndx, symsecndx, symsecname, strsecname, 1943*4a8d0ea7SAli Bahrami &sdflags)) == NULL) { 19447c478bd9Sstevel@tonic-gate ofl->ofl_flags |= FLG_OF_FATAL; 19457c478bd9Sstevel@tonic-gate continue; 19467c478bd9Sstevel@tonic-gate } 19477c478bd9Sstevel@tonic-gate 1948ba2be530Sab /* 1949ba2be530Sab * Now that we have the name, if the section index 1950ba2be530Sab * was bad, report it. 1951ba2be530Sab */ 1952ba2be530Sab if (shndx_bad) { 1953ba2be530Sab eprintf(ofl->ofl_lml, ERR_WARNING, 1954ba2be530Sab MSG_INTL(MSG_SYM_INVSHNDX), 1955*4a8d0ea7SAli Bahrami demangle_symname(name, symsecname, ndx), 1956ba2be530Sab ifl->ifl_name, 19574f680cc6SAli Bahrami conv_sym_shndx(osabi, mach, sym->st_shndx, 19584f680cc6SAli Bahrami CONV_FMT_DECIMAL, &inv_buf)); 1959ba2be530Sab continue; 1960ba2be530Sab } 1961ba2be530Sab 19627c478bd9Sstevel@tonic-gate /* 19637c478bd9Sstevel@tonic-gate * If this local symbol table originates from a shared 19647c478bd9Sstevel@tonic-gate * object, then we're only interested in recording 19657c478bd9Sstevel@tonic-gate * register symbols. As local symbol descriptors aren't 19667c478bd9Sstevel@tonic-gate * allocated for shared objects, one will be allocated 19677c478bd9Sstevel@tonic-gate * to associated with the register symbol. This symbol 19687c478bd9Sstevel@tonic-gate * won't become part of the output image, but we must 19697c478bd9Sstevel@tonic-gate * process it to test for register conflicts. 19707c478bd9Sstevel@tonic-gate */ 19717c478bd9Sstevel@tonic-gate rsdp = sdp = 0; 19727c478bd9Sstevel@tonic-gate if (sdflags & FLG_SY_REGSYM) { 1973ba2be530Sab /* 1974ba2be530Sab * The presence of FLG_SY_REGSYM means that 1975ba2be530Sab * the pointers in ld_targ.t_ms are non-NULL. 1976ba2be530Sab */ 1977ba2be530Sab rsdp = (*ld_targ.t_ms.ms_reg_find)(sym, ofl); 1978ba2be530Sab if (rsdp != 0) { 19797c478bd9Sstevel@tonic-gate /* 19807c478bd9Sstevel@tonic-gate * The fact that another register def- 19817c478bd9Sstevel@tonic-gate * inition has been found is fatal. 19827c478bd9Sstevel@tonic-gate * Call the verification routine to get 19837c478bd9Sstevel@tonic-gate * the error message and move on. 19847c478bd9Sstevel@tonic-gate */ 1985ba2be530Sab (void) (*ld_targ.t_ms.ms_reg_check) 1986ba2be530Sab (rsdp, sym, name, ifl, ofl); 19877c478bd9Sstevel@tonic-gate continue; 19887c478bd9Sstevel@tonic-gate } 19897c478bd9Sstevel@tonic-gate 19907c478bd9Sstevel@tonic-gate if (etype == ET_DYN) { 19917c478bd9Sstevel@tonic-gate if ((sdp = libld_calloc( 19926b3ba5bdSAli Bahrami sizeof (Sym_desc), 1)) == NULL) 19937c478bd9Sstevel@tonic-gate return (S_ERROR); 19947c478bd9Sstevel@tonic-gate sdp->sd_ref = REF_DYN_SEEN; 1995ca4eed8bSAli Bahrami 1996ca4eed8bSAli Bahrami /* Will not appear in output object */ 19971da7e599SAli Bahrami symtab_enter = 0; 19987c478bd9Sstevel@tonic-gate } 19997c478bd9Sstevel@tonic-gate } else if (etype == ET_DYN) 20007c478bd9Sstevel@tonic-gate continue; 20017c478bd9Sstevel@tonic-gate 20027c478bd9Sstevel@tonic-gate /* 20037c478bd9Sstevel@tonic-gate * Fill in the remaining symbol descriptor information. 20047c478bd9Sstevel@tonic-gate */ 20056b3ba5bdSAli Bahrami if (sdp == NULL) { 20067c478bd9Sstevel@tonic-gate sdp = &(ifl->ifl_locs[ndx]); 20077c478bd9Sstevel@tonic-gate sdp->sd_ref = REF_REL_NEED; 20087c478bd9Sstevel@tonic-gate } 20096b3ba5bdSAli Bahrami if (rsdp == NULL) { 20107c478bd9Sstevel@tonic-gate sdp->sd_name = name; 20117c478bd9Sstevel@tonic-gate sdp->sd_sym = sym; 20127c478bd9Sstevel@tonic-gate sdp->sd_shndx = shndx; 20137c478bd9Sstevel@tonic-gate sdp->sd_flags = sdflags; 20147c478bd9Sstevel@tonic-gate sdp->sd_file = ifl; 20157c478bd9Sstevel@tonic-gate ifl->ifl_oldndx[ndx] = sdp; 20167c478bd9Sstevel@tonic-gate } 20177c478bd9Sstevel@tonic-gate 20185aefb655Srie DBG_CALL(Dbg_syms_entry(ofl->ofl_lml, ndx, sdp)); 20197c478bd9Sstevel@tonic-gate 20207c478bd9Sstevel@tonic-gate /* 20217c478bd9Sstevel@tonic-gate * Reclassify any SHN_SUNW_IGNORE symbols to SHN_UNDEF 20227c478bd9Sstevel@tonic-gate * so as to simplify future processing. 20237c478bd9Sstevel@tonic-gate */ 20240bc07c75Srie if (sym->st_shndx == SHN_SUNW_IGNORE) { 20257c478bd9Sstevel@tonic-gate sdp->sd_shndx = shndx = SHN_UNDEF; 20267c478bd9Sstevel@tonic-gate sdp->sd_flags1 |= 20277c478bd9Sstevel@tonic-gate (FLG_SY1_IGNORE | FLG_SY1_ELIM); 20287c478bd9Sstevel@tonic-gate } 20297c478bd9Sstevel@tonic-gate 20307c478bd9Sstevel@tonic-gate /* 20317c478bd9Sstevel@tonic-gate * Process any register symbols. 20327c478bd9Sstevel@tonic-gate */ 20337c478bd9Sstevel@tonic-gate if (sdp->sd_flags & FLG_SY_REGSYM) { 20347c478bd9Sstevel@tonic-gate /* 20357c478bd9Sstevel@tonic-gate * Add a diagnostic to indicate we've caught a 20367c478bd9Sstevel@tonic-gate * register symbol, as this can be useful if a 20377c478bd9Sstevel@tonic-gate * register conflict is later discovered. 20387c478bd9Sstevel@tonic-gate */ 20395aefb655Srie DBG_CALL(Dbg_syms_entered(ofl, sym, sdp)); 20407c478bd9Sstevel@tonic-gate 20417c478bd9Sstevel@tonic-gate /* 20427c478bd9Sstevel@tonic-gate * If this register symbol hasn't already been 20437c478bd9Sstevel@tonic-gate * recorded, enter it now. 2044ba2be530Sab * 2045ba2be530Sab * The presence of FLG_SY_REGSYM means that 2046ba2be530Sab * the pointers in ld_targ.t_ms are non-NULL. 20477c478bd9Sstevel@tonic-gate */ 20486b3ba5bdSAli Bahrami if ((rsdp == NULL) && 2049ba2be530Sab ((*ld_targ.t_ms.ms_reg_enter)(sdp, ofl) == 2050ba2be530Sab 0)) 20517c478bd9Sstevel@tonic-gate return (S_ERROR); 20527c478bd9Sstevel@tonic-gate } 20537c478bd9Sstevel@tonic-gate 20547c478bd9Sstevel@tonic-gate /* 20557c478bd9Sstevel@tonic-gate * Assign an input section. 20567c478bd9Sstevel@tonic-gate */ 20570bc07c75Srie if ((sym->st_shndx != SHN_UNDEF) && 20587c478bd9Sstevel@tonic-gate ((sdp->sd_flags & FLG_SY_SPECSEC) == 0)) 20597c478bd9Sstevel@tonic-gate sdp->sd_isc = ifl->ifl_isdesc[shndx]; 20607c478bd9Sstevel@tonic-gate 20617c478bd9Sstevel@tonic-gate /* 20627c478bd9Sstevel@tonic-gate * If this symbol falls within the range of a section 20637c478bd9Sstevel@tonic-gate * being discarded, then discard the symbol itself. 20647c478bd9Sstevel@tonic-gate * There is no reason to keep this local symbol. 20657c478bd9Sstevel@tonic-gate */ 20667c478bd9Sstevel@tonic-gate if (sdp->sd_isc && 20677c478bd9Sstevel@tonic-gate (sdp->sd_isc->is_flags & FLG_IS_DISCARD)) { 20687c478bd9Sstevel@tonic-gate sdp->sd_flags |= FLG_SY_ISDISC; 2069a194faf8Srie DBG_CALL(Dbg_syms_discarded(ofl->ofl_lml, sdp)); 20707c478bd9Sstevel@tonic-gate continue; 20717c478bd9Sstevel@tonic-gate } 20727c478bd9Sstevel@tonic-gate 20737c478bd9Sstevel@tonic-gate /* 20747c478bd9Sstevel@tonic-gate * Skip any section symbols as new versions of these 20757c478bd9Sstevel@tonic-gate * will be created. 20767c478bd9Sstevel@tonic-gate */ 20777c478bd9Sstevel@tonic-gate if ((type = ELF_ST_TYPE(sym->st_info)) == STT_SECTION) { 20780bc07c75Srie if (sym->st_shndx == SHN_UNDEF) { 20795aefb655Srie eprintf(ofl->ofl_lml, ERR_WARNING, 20807c478bd9Sstevel@tonic-gate MSG_INTL(MSG_SYM_INVSHNDX), 2081*4a8d0ea7SAli Bahrami demangle_symname(name, symsecname, 2082ba2be530Sab ndx), ifl->ifl_name, 20834f680cc6SAli Bahrami conv_sym_shndx(osabi, mach, 20844f680cc6SAli Bahrami sym->st_shndx, CONV_FMT_DECIMAL, 2085de777a60Sab &inv_buf)); 20867c478bd9Sstevel@tonic-gate } 20877c478bd9Sstevel@tonic-gate continue; 20887c478bd9Sstevel@tonic-gate } 20897c478bd9Sstevel@tonic-gate 209075e45495Sab /* 209175e45495Sab * For a relocatable object, if this symbol is defined 209275e45495Sab * and has non-zero length and references an address 209375e45495Sab * within an associated section, then check its extents 209475e45495Sab * to make sure the section boundaries encompass it. 209575e45495Sab * If they don't, the ELF file is corrupt. 209675e45495Sab */ 209724b9abbaSab if (etype_rel) { 209824b9abbaSab if (SYM_LOC_BADADDR(sdp, sym, type)) { 209924b9abbaSab issue_badaddr_msg(ifl, ofl, sdp, 210024b9abbaSab sym, shndx); 2101ca4eed8bSAli Bahrami if (ofl->ofl_flags & FLG_OF_FATAL) 2102ca4eed8bSAli Bahrami continue; 210324b9abbaSab } 210424b9abbaSab 210524b9abbaSab /* 210624b9abbaSab * We have observed relocatable objects 210724b9abbaSab * containing identical adjacent STT_FILE 210824b9abbaSab * symbols. Discard any other than the first, 210924b9abbaSab * as they are all equivalent and the extras 211024b9abbaSab * do not add information. 211124b9abbaSab * 211224b9abbaSab * For the purpose of this test, we assume 211324b9abbaSab * that only the symbol type and the string 211424b9abbaSab * table offset (st_name) matter. 211524b9abbaSab */ 211624b9abbaSab if (type == STT_FILE) { 211724b9abbaSab int toss = (last_file_sdp != NULL) && 211824b9abbaSab ((ndx - 1) == last_file_ndx) && 211924b9abbaSab (sym->st_name == 212024b9abbaSab last_file_sdp->sd_sym->st_name); 212124b9abbaSab 212224b9abbaSab last_file_sdp = sdp; 212324b9abbaSab last_file_ndx = ndx; 212424b9abbaSab if (toss) { 212524b9abbaSab sdp->sd_flags |= FLG_SY_INVALID; 212624b9abbaSab DBG_CALL(Dbg_syms_dup_discarded( 212724b9abbaSab ofl->ofl_lml, ndx, sdp)); 212824b9abbaSab continue; 212924b9abbaSab } 213024b9abbaSab } 213175e45495Sab } 213275e45495Sab 213324b9abbaSab 21347c478bd9Sstevel@tonic-gate /* 21357c478bd9Sstevel@tonic-gate * Sanity check for TLS 21367c478bd9Sstevel@tonic-gate */ 21370bc07c75Srie if ((sym->st_size != 0) && ((type == STT_TLS) && 21380bc07c75Srie (sym->st_shndx != SHN_COMMON))) { 21397c478bd9Sstevel@tonic-gate Is_desc *isp = sdp->sd_isc; 21407c478bd9Sstevel@tonic-gate 21416b3ba5bdSAli Bahrami if ((isp == NULL) || (isp->is_shdr == NULL) || 21427c478bd9Sstevel@tonic-gate ((isp->is_shdr->sh_flags & SHF_TLS) == 0)) { 21435aefb655Srie eprintf(ofl->ofl_lml, ERR_FATAL, 21447c478bd9Sstevel@tonic-gate MSG_INTL(MSG_SYM_TLS), 21457c478bd9Sstevel@tonic-gate demangle(sdp->sd_name), 21467c478bd9Sstevel@tonic-gate ifl->ifl_name); 21477c478bd9Sstevel@tonic-gate ofl->ofl_flags |= FLG_OF_FATAL; 21487c478bd9Sstevel@tonic-gate continue; 21497c478bd9Sstevel@tonic-gate } 21507c478bd9Sstevel@tonic-gate } 21517c478bd9Sstevel@tonic-gate 21527c478bd9Sstevel@tonic-gate /* 21537c478bd9Sstevel@tonic-gate * Carry our some basic sanity checks (these are just 21547c478bd9Sstevel@tonic-gate * some of the erroneous symbol entries we've come 21557c478bd9Sstevel@tonic-gate * across, there's probably a lot more). The symbol 21567c478bd9Sstevel@tonic-gate * will not be carried forward to the output file, which 21577c478bd9Sstevel@tonic-gate * won't be a problem unless a relocation is required 21587c478bd9Sstevel@tonic-gate * against it. 21597c478bd9Sstevel@tonic-gate */ 21607c478bd9Sstevel@tonic-gate if (((sdp->sd_flags & FLG_SY_SPECSEC) && 21610bc07c75Srie ((sym->st_shndx == SHN_COMMON)) || 21620bc07c75Srie ((type == STT_FILE) && 21630bc07c75Srie (sym->st_shndx != SHN_ABS))) || 21646b3ba5bdSAli Bahrami (sdp->sd_isc && (sdp->sd_isc->is_osdesc == NULL))) { 21655aefb655Srie eprintf(ofl->ofl_lml, ERR_WARNING, 21665aefb655Srie MSG_INTL(MSG_SYM_INVSHNDX), 2167*4a8d0ea7SAli Bahrami demangle_symname(name, symsecname, ndx), 2168ba2be530Sab ifl->ifl_name, 21694f680cc6SAli Bahrami conv_sym_shndx(osabi, mach, sym->st_shndx, 21704f680cc6SAli Bahrami CONV_FMT_DECIMAL, &inv_buf)); 21717c478bd9Sstevel@tonic-gate sdp->sd_isc = NULL; 21727c478bd9Sstevel@tonic-gate sdp->sd_flags |= FLG_SY_INVALID; 21737c478bd9Sstevel@tonic-gate continue; 21747c478bd9Sstevel@tonic-gate } 21757c478bd9Sstevel@tonic-gate 21767c478bd9Sstevel@tonic-gate /* 21777c478bd9Sstevel@tonic-gate * As these local symbols will become part of the output 21787c478bd9Sstevel@tonic-gate * image, record their number and name string size. 21797c478bd9Sstevel@tonic-gate * Globals are counted after all input file processing 21807c478bd9Sstevel@tonic-gate * (and hence symbol resolution) is complete during 21817c478bd9Sstevel@tonic-gate * sym_validate(). 21827c478bd9Sstevel@tonic-gate */ 21831da7e599SAli Bahrami if (!(ofl->ofl_flags & FLG_OF_REDLSYM) && 21841da7e599SAli Bahrami symtab_enter) { 21857c478bd9Sstevel@tonic-gate ofl->ofl_locscnt++; 21867c478bd9Sstevel@tonic-gate 21877c478bd9Sstevel@tonic-gate if ((((sdp->sd_flags & FLG_SY_REGSYM) == 0) || 21887c478bd9Sstevel@tonic-gate sym->st_name) && (st_insert(ofl->ofl_strtab, 21897c478bd9Sstevel@tonic-gate sdp->sd_name) == -1)) 21907c478bd9Sstevel@tonic-gate return (S_ERROR); 21919039eeafSab 21929039eeafSab if (allow_ldynsym && sym->st_name && 2193d579eb63Sab ldynsym_symtype[type]) { 21949039eeafSab ofl->ofl_dynlocscnt++; 21959039eeafSab if (st_insert(ofl->ofl_dynstrtab, 21969039eeafSab sdp->sd_name) == -1) 21979039eeafSab return (S_ERROR); 2198d579eb63Sab /* Include it in sort section? */ 2199d579eb63Sab DYNSORT_COUNT(sdp, sym, type, ++); 22009039eeafSab } 22017c478bd9Sstevel@tonic-gate } 22027c478bd9Sstevel@tonic-gate } 22037c478bd9Sstevel@tonic-gate } 22047c478bd9Sstevel@tonic-gate 2205d840867fSab /* 2206d840867fSab * The GNU ld interprets the top bit of the 16-bit Versym value 2207d840867fSab * (0x8000) as the "hidden" bit. If this bit is set, the linker 2208d840867fSab * is supposed to act as if that symbol does not exist. The Solaris 2209d840867fSab * linker does not support this mechanism, or the model of interface 2210d840867fSab * evolution that it allows, but we honor it in GNU ld produced 2211d840867fSab * objects in order to interoperate with them. 2212d840867fSab * 2213d840867fSab * Determine if we should honor the GNU hidden bit for this file. 2214d840867fSab */ 2215d840867fSab test_gnu_hidden_bit = ((ifl->ifl_flags & FLG_IF_GNUVER) != 0) && 2216d840867fSab (ifl->ifl_versym != NULL); 2217d840867fSab 22187c478bd9Sstevel@tonic-gate /* 22197c478bd9Sstevel@tonic-gate * Now scan the global symbols entering them in the internal symbol 22207c478bd9Sstevel@tonic-gate * table or resolving them as necessary. 22217c478bd9Sstevel@tonic-gate */ 22227c478bd9Sstevel@tonic-gate sym = (Sym *)isc->is_indata->d_buf; 22237c478bd9Sstevel@tonic-gate sym += local; 22246b3ba5bdSAli Bahrami weak = 0; 22257c478bd9Sstevel@tonic-gate /* LINTED */ 22267c478bd9Sstevel@tonic-gate for (ndx = (int)local; ndx < total; sym++, ndx++) { 22277c478bd9Sstevel@tonic-gate const char *name; 22287c478bd9Sstevel@tonic-gate Word shndx, sdflags = 0; 2229ba2be530Sab int shndx_bad = 0; 22307c478bd9Sstevel@tonic-gate 22317c478bd9Sstevel@tonic-gate /* 2232ba2be530Sab * Determine and validate the associated section index. 22337c478bd9Sstevel@tonic-gate */ 22347c478bd9Sstevel@tonic-gate if (symshndx && (sym->st_shndx == SHN_XINDEX)) { 22357c478bd9Sstevel@tonic-gate shndx = symshndx[ndx]; 2236ba2be530Sab } else if ((shndx = sym->st_shndx) >= SHN_LORESERVE) { 2237ba2be530Sab sdflags |= FLG_SY_SPECSEC; 2238ba2be530Sab } else if (shndx > ifl->ifl_ehdr->e_shnum) { 2239ba2be530Sab /* We need the name before we can issue error */ 2240ba2be530Sab shndx_bad = 1; 22417c478bd9Sstevel@tonic-gate } 22427c478bd9Sstevel@tonic-gate 22437c478bd9Sstevel@tonic-gate /* 22447c478bd9Sstevel@tonic-gate * Check if st_name has a valid value or not. 22457c478bd9Sstevel@tonic-gate */ 22465aefb655Srie if ((name = string(ofl, ifl, sym, strs, strsize, ndx, shndx, 2247*4a8d0ea7SAli Bahrami symsecndx, symsecname, strsecname, &sdflags)) == NULL) { 22487c478bd9Sstevel@tonic-gate ofl->ofl_flags |= FLG_OF_FATAL; 22497c478bd9Sstevel@tonic-gate continue; 22507c478bd9Sstevel@tonic-gate } 22517c478bd9Sstevel@tonic-gate 2252ba2be530Sab /* 2253ba2be530Sab * Now that we have the name, if the section index 2254ba2be530Sab * was bad, report it. 2255ba2be530Sab */ 2256ba2be530Sab if (shndx_bad) { 2257ba2be530Sab eprintf(ofl->ofl_lml, ERR_WARNING, 2258ba2be530Sab MSG_INTL(MSG_SYM_INVSHNDX), 2259*4a8d0ea7SAli Bahrami demangle_symname(name, symsecname, ndx), 2260ba2be530Sab ifl->ifl_name, 22614f680cc6SAli Bahrami conv_sym_shndx(osabi, mach, sym->st_shndx, 22624f680cc6SAli Bahrami CONV_FMT_DECIMAL, &inv_buf)); 2263ba2be530Sab continue; 2264ba2be530Sab } 2265ba2be530Sab 2266ba2be530Sab 22673b41b08bSab /* 2268d840867fSab * Test for the GNU hidden bit, and ignore symbols that 2269d840867fSab * have it set. 22703b41b08bSab */ 2271d840867fSab if (test_gnu_hidden_bit && 2272d840867fSab ((ifl->ifl_versym[ndx] & 0x8000) != 0)) 22733b41b08bSab continue; 22743b41b08bSab 22757c478bd9Sstevel@tonic-gate /* 22767c478bd9Sstevel@tonic-gate * The linker itself will generate symbols for _end, _etext, 22777c478bd9Sstevel@tonic-gate * _edata, _DYNAMIC and _PROCEDURE_LINKAGE_TABLE_, so don't 22787c478bd9Sstevel@tonic-gate * bother entering these symbols from shared objects. This 22797c478bd9Sstevel@tonic-gate * results in some wasted resolution processing, which is hard 22807c478bd9Sstevel@tonic-gate * to feel, but if nothing else, pollutes diagnostic relocation 22817c478bd9Sstevel@tonic-gate * output. 22827c478bd9Sstevel@tonic-gate */ 22837c478bd9Sstevel@tonic-gate if (name[0] && (etype == ET_DYN) && (sym->st_size == 0) && 22847c478bd9Sstevel@tonic-gate (ELF_ST_TYPE(sym->st_info) == STT_OBJECT) && 22857c478bd9Sstevel@tonic-gate (name[0] == '_') && ((name[1] == 'e') || 22867c478bd9Sstevel@tonic-gate (name[1] == 'D') || (name[1] == 'P')) && 22877c478bd9Sstevel@tonic-gate ((strcmp(name, MSG_ORIG(MSG_SYM_ETEXT_U)) == 0) || 22887c478bd9Sstevel@tonic-gate (strcmp(name, MSG_ORIG(MSG_SYM_EDATA_U)) == 0) || 22897c478bd9Sstevel@tonic-gate (strcmp(name, MSG_ORIG(MSG_SYM_END_U)) == 0) || 22907c478bd9Sstevel@tonic-gate (strcmp(name, MSG_ORIG(MSG_SYM_DYNAMIC_U)) == 0) || 22917c478bd9Sstevel@tonic-gate (strcmp(name, MSG_ORIG(MSG_SYM_PLKTBL_U)) == 0))) { 22927c478bd9Sstevel@tonic-gate ifl->ifl_oldndx[ndx] = 0; 22937c478bd9Sstevel@tonic-gate continue; 22947c478bd9Sstevel@tonic-gate } 22957c478bd9Sstevel@tonic-gate 22967c478bd9Sstevel@tonic-gate /* 22977c478bd9Sstevel@tonic-gate * Determine and validate the symbols binding. 22987c478bd9Sstevel@tonic-gate */ 22997c478bd9Sstevel@tonic-gate bind = ELF_ST_BIND(sym->st_info); 23007c478bd9Sstevel@tonic-gate if ((bind != STB_GLOBAL) && (bind != STB_WEAK)) { 23015aefb655Srie eprintf(ofl->ofl_lml, ERR_WARNING, 2302ba2be530Sab MSG_INTL(MSG_SYM_NONGLOB), 2303*4a8d0ea7SAli Bahrami demangle_symname(name, symsecname, ndx), 2304de777a60Sab ifl->ifl_name, 2305de777a60Sab conv_sym_info_bind(bind, 0, &inv_buf)); 23067c478bd9Sstevel@tonic-gate continue; 23077c478bd9Sstevel@tonic-gate } 23086b3ba5bdSAli Bahrami if (bind == STB_WEAK) 23096b3ba5bdSAli Bahrami weak++; 23107c478bd9Sstevel@tonic-gate 23117c478bd9Sstevel@tonic-gate /* 23127c478bd9Sstevel@tonic-gate * If this symbol falls within the range of a section being 23137c478bd9Sstevel@tonic-gate * discarded, then discard the symbol itself. 23147c478bd9Sstevel@tonic-gate */ 23157c478bd9Sstevel@tonic-gate if (((sdflags & FLG_SY_SPECSEC) == 0) && 23160bc07c75Srie (sym->st_shndx != SHN_UNDEF)) { 23177c478bd9Sstevel@tonic-gate Is_desc *isp; 23187c478bd9Sstevel@tonic-gate 23197c478bd9Sstevel@tonic-gate if (shndx >= ifl->ifl_shnum) { 23207c478bd9Sstevel@tonic-gate /* 23217c478bd9Sstevel@tonic-gate * Carry our some basic sanity checks 23227c478bd9Sstevel@tonic-gate * The symbol will not be carried forward to 23237c478bd9Sstevel@tonic-gate * the output file, which won't be a problem 23247c478bd9Sstevel@tonic-gate * unless a relocation is required against it. 23257c478bd9Sstevel@tonic-gate */ 23265aefb655Srie eprintf(ofl->ofl_lml, ERR_WARNING, 2327ba2be530Sab MSG_INTL(MSG_SYM_INVSHNDX), 2328*4a8d0ea7SAli Bahrami demangle_symname(name, symsecname, ndx), 23290bc07c75Srie ifl->ifl_name, 23304f680cc6SAli Bahrami conv_sym_shndx(osabi, mach, sym->st_shndx, 23314f680cc6SAli Bahrami CONV_FMT_DECIMAL, &inv_buf)); 23327c478bd9Sstevel@tonic-gate continue; 23337c478bd9Sstevel@tonic-gate } 23347c478bd9Sstevel@tonic-gate 23357c478bd9Sstevel@tonic-gate isp = ifl->ifl_isdesc[shndx]; 23367c478bd9Sstevel@tonic-gate if (isp && (isp->is_flags & FLG_IS_DISCARD)) { 23377c478bd9Sstevel@tonic-gate if ((sdp = 23386b3ba5bdSAli Bahrami libld_calloc(sizeof (Sym_desc), 1)) == NULL) 23397c478bd9Sstevel@tonic-gate return (S_ERROR); 23407c478bd9Sstevel@tonic-gate 23417c478bd9Sstevel@tonic-gate /* 23427c478bd9Sstevel@tonic-gate * Create a dummy symbol entry so that if we 23437c478bd9Sstevel@tonic-gate * find any references to this discarded symbol 23447c478bd9Sstevel@tonic-gate * we can compensate. 23457c478bd9Sstevel@tonic-gate */ 23467c478bd9Sstevel@tonic-gate sdp->sd_name = name; 23477c478bd9Sstevel@tonic-gate sdp->sd_sym = sym; 23487c478bd9Sstevel@tonic-gate sdp->sd_file = ifl; 23497c478bd9Sstevel@tonic-gate sdp->sd_isc = isp; 23507c478bd9Sstevel@tonic-gate sdp->sd_flags = FLG_SY_ISDISC; 23517c478bd9Sstevel@tonic-gate ifl->ifl_oldndx[ndx] = sdp; 23527c478bd9Sstevel@tonic-gate 2353a194faf8Srie DBG_CALL(Dbg_syms_discarded(ofl->ofl_lml, sdp)); 23547c478bd9Sstevel@tonic-gate continue; 23557c478bd9Sstevel@tonic-gate } 23567c478bd9Sstevel@tonic-gate } 23577c478bd9Sstevel@tonic-gate 23587c478bd9Sstevel@tonic-gate /* 23597c478bd9Sstevel@tonic-gate * If the symbol does not already exist in the internal symbol 23607c478bd9Sstevel@tonic-gate * table add it, otherwise resolve the conflict. If the symbol 23617c478bd9Sstevel@tonic-gate * from this file is kept, retain its symbol table index for 23627c478bd9Sstevel@tonic-gate * possible use in associating a global alias. 23637c478bd9Sstevel@tonic-gate */ 23647c478bd9Sstevel@tonic-gate /* LINTED */ 23657c478bd9Sstevel@tonic-gate hash = (Word)elf_hash((const char *)name); 23665aefb655Srie if ((sdp = ld_sym_find(name, hash, &where, ofl)) == NULL) { 23675aefb655Srie DBG_CALL(Dbg_syms_global(ofl->ofl_lml, ndx, name)); 23685aefb655Srie if ((sdp = ld_sym_enter(name, sym, hash, ifl, ofl, ndx, 23697c478bd9Sstevel@tonic-gate shndx, sdflags, 0, &where)) == (Sym_desc *)S_ERROR) 23707c478bd9Sstevel@tonic-gate return (S_ERROR); 23717c478bd9Sstevel@tonic-gate 23725aefb655Srie } else if (ld_sym_resolve(sdp, sym, ifl, ofl, ndx, shndx, 23737c478bd9Sstevel@tonic-gate sdflags) == S_ERROR) 23747c478bd9Sstevel@tonic-gate return (S_ERROR); 23757c478bd9Sstevel@tonic-gate 23767c478bd9Sstevel@tonic-gate /* 23777c478bd9Sstevel@tonic-gate * After we've compared a defined symbol in one shared 23787c478bd9Sstevel@tonic-gate * object, flag the symbol so we don't compare it again. 23797c478bd9Sstevel@tonic-gate */ 23800bc07c75Srie if ((etype == ET_DYN) && (sym->st_shndx != SHN_UNDEF) && 23817c478bd9Sstevel@tonic-gate ((sdp->sd_flags & FLG_SY_SOFOUND) == 0)) 23827c478bd9Sstevel@tonic-gate sdp->sd_flags |= FLG_SY_SOFOUND; 23837c478bd9Sstevel@tonic-gate 23847c478bd9Sstevel@tonic-gate /* 23857c478bd9Sstevel@tonic-gate * If the symbol is accepted from this file retain the symbol 23867c478bd9Sstevel@tonic-gate * index for possible use in aliasing. 23877c478bd9Sstevel@tonic-gate */ 23887c478bd9Sstevel@tonic-gate if (sdp->sd_file == ifl) 23897c478bd9Sstevel@tonic-gate sdp->sd_symndx = ndx; 23907c478bd9Sstevel@tonic-gate 23917c478bd9Sstevel@tonic-gate ifl->ifl_oldndx[ndx] = sdp; 23927c478bd9Sstevel@tonic-gate 23937c478bd9Sstevel@tonic-gate /* 23947c478bd9Sstevel@tonic-gate * If we've accepted a register symbol, continue to validate 23957c478bd9Sstevel@tonic-gate * it. 23967c478bd9Sstevel@tonic-gate */ 23977c478bd9Sstevel@tonic-gate if (sdp->sd_flags & FLG_SY_REGSYM) { 23987c478bd9Sstevel@tonic-gate Sym_desc *rsdp; 23997c478bd9Sstevel@tonic-gate 2400ba2be530Sab /* 2401ba2be530Sab * The presence of FLG_SY_REGSYM means that 2402ba2be530Sab * the pointers in ld_targ.t_ms are non-NULL. 2403ba2be530Sab */ 2404ba2be530Sab rsdp = (*ld_targ.t_ms.ms_reg_find)(sdp->sd_sym, ofl); 24056b3ba5bdSAli Bahrami if (rsdp == NULL) { 2406ba2be530Sab if ((*ld_targ.t_ms.ms_reg_enter)(sdp, ofl) == 0) 24077c478bd9Sstevel@tonic-gate return (S_ERROR); 24087c478bd9Sstevel@tonic-gate } else if (rsdp != sdp) { 2409ba2be530Sab (void) (*ld_targ.t_ms.ms_reg_check)(rsdp, 2410ba2be530Sab sdp->sd_sym, sdp->sd_name, ifl, ofl); 24117c478bd9Sstevel@tonic-gate } 24127c478bd9Sstevel@tonic-gate } 241375e45495Sab 241475e45495Sab /* 241575e45495Sab * For a relocatable object, if this symbol is defined 241675e45495Sab * and has non-zero length and references an address 241775e45495Sab * within an associated section, then check its extents 241875e45495Sab * to make sure the section boundaries encompass it. 241975e45495Sab * If they don't, the ELF file is corrupt. Note that this 242075e45495Sab * global symbol may have come from another file to satisfy 242175e45495Sab * an UNDEF symbol of the same name from this one. In that 242275e45495Sab * case, we don't check it, because it was already checked 242375e45495Sab * as part of its own file. 242475e45495Sab */ 242575e45495Sab if (etype_rel && (sdp->sd_file == ifl)) { 242675e45495Sab Sym *tsym = sdp->sd_sym; 242775e45495Sab 242875e45495Sab if (SYM_LOC_BADADDR(sdp, tsym, 242975e45495Sab ELF_ST_TYPE(tsym->st_info))) { 243069a0bf0cSab issue_badaddr_msg(ifl, ofl, sdp, 243169a0bf0cSab tsym, tsym->st_shndx); 243275e45495Sab continue; 243375e45495Sab } 243475e45495Sab } 24357c478bd9Sstevel@tonic-gate } 24367c478bd9Sstevel@tonic-gate 24377c478bd9Sstevel@tonic-gate /* 24386b3ba5bdSAli Bahrami * Associate weak (alias) symbols to their non-weak counterparts by 24396b3ba5bdSAli Bahrami * scaning the global symbols one more time. 24406b3ba5bdSAli Bahrami * 24416b3ba5bdSAli Bahrami * This association is needed when processing the symbols from a shared 24426b3ba5bdSAli Bahrami * object dependency when a a weak definition satisfies a reference: 24437c478bd9Sstevel@tonic-gate * 24446b3ba5bdSAli Bahrami * - When building a dynamic executable, if a referenced symbol is a 24456b3ba5bdSAli Bahrami * data item, the symbol data is copied to the executables address 24466b3ba5bdSAli Bahrami * space. In this copy-relocation case, we must also reassociate 24476b3ba5bdSAli Bahrami * the alias symbol with its new location in the executable. 24487c478bd9Sstevel@tonic-gate * 24496b3ba5bdSAli Bahrami * - If the referenced symbol is a function then we may need to 24506b3ba5bdSAli Bahrami * promote the symbols binding from undefined weak to undefined, 24516b3ba5bdSAli Bahrami * otherwise the run-time linker will not generate the correct 24526b3ba5bdSAli Bahrami * relocation error should the symbol not be found. 24536b3ba5bdSAli Bahrami * 24546b3ba5bdSAli Bahrami * Weak alias association is also required when a local dynsym table 24556b3ba5bdSAli Bahrami * is being created. This table should only contain one instance of a 24566b3ba5bdSAli Bahrami * symbol that is associated to a given address. 24577c478bd9Sstevel@tonic-gate * 24587c478bd9Sstevel@tonic-gate * The true association between a weak/strong symbol pair is that both 24596b3ba5bdSAli Bahrami * symbol entries are identical, thus first we create a sorted symbol 24606b3ba5bdSAli Bahrami * list keyed off of the symbols section index and value. If the symbol 24616b3ba5bdSAli Bahrami * belongs to the same section and has the same value, then the chances 24626b3ba5bdSAli Bahrami * are that the rest of the symbols data is the same. This list is then 24636b3ba5bdSAli Bahrami * scanned for weak symbols, and if one is found then any strong 24646b3ba5bdSAli Bahrami * association will exist in the entries that follow. Thus we just have 24656b3ba5bdSAli Bahrami * to scan one (typically a single alias) or more (in the uncommon 24666b3ba5bdSAli Bahrami * instance of multiple weak to strong associations) entries to 24676b3ba5bdSAli Bahrami * determine if a match exists. 24687c478bd9Sstevel@tonic-gate */ 24696b3ba5bdSAli Bahrami if (weak && (OFL_ALLOW_LDYNSYM(ofl) || (etype == ET_DYN)) && 2470d579eb63Sab (total > local)) { 24716b3ba5bdSAli Bahrami static Sym_desc **sort; 24726b3ba5bdSAli Bahrami static size_t osize = 0; 24736b3ba5bdSAli Bahrami size_t nsize = (total - local) * sizeof (Sym_desc *); 24747c478bd9Sstevel@tonic-gate 24756b3ba5bdSAli Bahrami /* 24766b3ba5bdSAli Bahrami * As we might be processing many input files, and many symbols, 24776b3ba5bdSAli Bahrami * try and reuse a static sort buffer. Note, presently we're 24786b3ba5bdSAli Bahrami * playing the game of never freeing any buffers as there's a 24796b3ba5bdSAli Bahrami * belief this wastes time. 24806b3ba5bdSAli Bahrami */ 24816b3ba5bdSAli Bahrami if ((osize == 0) || (nsize > osize)) { 24826b3ba5bdSAli Bahrami if ((sort = libld_malloc(nsize)) == NULL) 24836b3ba5bdSAli Bahrami return (S_ERROR); 24846b3ba5bdSAli Bahrami osize = nsize; 24856b3ba5bdSAli Bahrami } 24866b3ba5bdSAli Bahrami (void) memcpy((void *)sort, &ifl->ifl_oldndx[local], nsize); 24877c478bd9Sstevel@tonic-gate 24887c478bd9Sstevel@tonic-gate qsort(sort, (total - local), sizeof (Sym_desc *), compare); 24897c478bd9Sstevel@tonic-gate 24907c478bd9Sstevel@tonic-gate for (ndx = 0; ndx < (total - local); ndx++) { 24916b3ba5bdSAli Bahrami Sym_desc *wsdp = sort[ndx]; 24926b3ba5bdSAli Bahrami Sym *wsym; 24937c478bd9Sstevel@tonic-gate int sndx; 24947c478bd9Sstevel@tonic-gate 24956b3ba5bdSAli Bahrami /* 24966b3ba5bdSAli Bahrami * Ignore any empty symbol descriptor, or the case where 24976b3ba5bdSAli Bahrami * the symbol has been resolved to a different file. 24986b3ba5bdSAli Bahrami */ 24996b3ba5bdSAli Bahrami if ((wsdp == NULL) || (wsdp->sd_file != ifl)) 25007c478bd9Sstevel@tonic-gate continue; 25017c478bd9Sstevel@tonic-gate 25027c478bd9Sstevel@tonic-gate wsym = wsdp->sd_sym; 25037c478bd9Sstevel@tonic-gate 25046b3ba5bdSAli Bahrami if ((wsym->st_shndx == SHN_UNDEF) || 25056b3ba5bdSAli Bahrami (wsdp->sd_flags & FLG_SY_SPECSEC) || 25066b3ba5bdSAli Bahrami (ELF_ST_BIND(wsym->st_info) != STB_WEAK)) 25077c478bd9Sstevel@tonic-gate continue; 25087c478bd9Sstevel@tonic-gate 25097c478bd9Sstevel@tonic-gate /* 25107c478bd9Sstevel@tonic-gate * We have a weak symbol, if it has a strong alias it 25117c478bd9Sstevel@tonic-gate * will have been sorted to one of the following sort 25127c478bd9Sstevel@tonic-gate * table entries. Note that we could have multiple weak 25137c478bd9Sstevel@tonic-gate * symbols aliased to one strong (if this occurs then 25147c478bd9Sstevel@tonic-gate * the strong symbol only maintains one alias back to 25157c478bd9Sstevel@tonic-gate * the last weak). 25167c478bd9Sstevel@tonic-gate */ 25177c478bd9Sstevel@tonic-gate for (sndx = ndx + 1; sndx < (total - local); sndx++) { 25186b3ba5bdSAli Bahrami Sym_desc *ssdp = sort[sndx]; 25196b3ba5bdSAli Bahrami Sym *ssym; 25206b3ba5bdSAli Bahrami int w_dynbits, s_dynbits; 25217c478bd9Sstevel@tonic-gate 25226b3ba5bdSAli Bahrami /* 25236b3ba5bdSAli Bahrami * Ignore any empty symbol descriptor, or the 25246b3ba5bdSAli Bahrami * case where the symbol has been resolved to a 25256b3ba5bdSAli Bahrami * different file. 25266b3ba5bdSAli Bahrami */ 25276b3ba5bdSAli Bahrami if ((ssdp == NULL) || (ssdp->sd_file != ifl)) 25286b3ba5bdSAli Bahrami continue; 25297c478bd9Sstevel@tonic-gate 25307c478bd9Sstevel@tonic-gate ssym = ssdp->sd_sym; 25317c478bd9Sstevel@tonic-gate 25326b3ba5bdSAli Bahrami if (ssym->st_shndx == SHN_UNDEF) 25336b3ba5bdSAli Bahrami continue; 25346b3ba5bdSAli Bahrami 25356b3ba5bdSAli Bahrami if ((ssym->st_shndx != wsym->st_shndx) || 25366b3ba5bdSAli Bahrami (ssym->st_value != wsym->st_value)) 25377c478bd9Sstevel@tonic-gate break; 25387c478bd9Sstevel@tonic-gate 25396b3ba5bdSAli Bahrami if ((ssym->st_size != wsym->st_size) || 25406b3ba5bdSAli Bahrami (ssdp->sd_flags & FLG_SY_SPECSEC) || 25416b3ba5bdSAli Bahrami (ELF_ST_BIND(ssym->st_info) == STB_WEAK)) 25426b3ba5bdSAli Bahrami continue; 2543d579eb63Sab 25446b3ba5bdSAli Bahrami /* 25456b3ba5bdSAli Bahrami * If a sharable object, set link fields so 25466b3ba5bdSAli Bahrami * that they reference each other.` 25476b3ba5bdSAli Bahrami */ 25486b3ba5bdSAli Bahrami if (etype == ET_DYN) { 25496b3ba5bdSAli Bahrami ssdp->sd_aux->sa_linkndx = 25506b3ba5bdSAli Bahrami (Word)wsdp->sd_symndx; 25516b3ba5bdSAli Bahrami wsdp->sd_aux->sa_linkndx = 25526b3ba5bdSAli Bahrami (Word)ssdp->sd_symndx; 25536b3ba5bdSAli Bahrami } 25546b3ba5bdSAli Bahrami 25556b3ba5bdSAli Bahrami /* 25566b3ba5bdSAli Bahrami * Determine which of these two symbols go into 25576b3ba5bdSAli Bahrami * the sort section. If a mapfile has made 25586b3ba5bdSAli Bahrami * explicit settings of the FLG_SY_*DYNSORT 25596b3ba5bdSAli Bahrami * flags for both symbols, then we do what they 25606b3ba5bdSAli Bahrami * say. If one has the DYNSORT flags set, we 25616b3ba5bdSAli Bahrami * set the NODYNSORT bit in the other. And if 25626b3ba5bdSAli Bahrami * neither has an explicit setting, then we 25636b3ba5bdSAli Bahrami * favor the weak symbol because they usually 25646b3ba5bdSAli Bahrami * lack the leading underscore. 25656b3ba5bdSAli Bahrami */ 25666b3ba5bdSAli Bahrami w_dynbits = wsdp->sd_flags & 25676b3ba5bdSAli Bahrami (FLG_SY_DYNSORT | FLG_SY_NODYNSORT); 25686b3ba5bdSAli Bahrami s_dynbits = ssdp->sd_flags & 25696b3ba5bdSAli Bahrami (FLG_SY_DYNSORT | FLG_SY_NODYNSORT); 25706b3ba5bdSAli Bahrami if (!(w_dynbits && s_dynbits)) { 25716b3ba5bdSAli Bahrami if (s_dynbits) { 25726b3ba5bdSAli Bahrami if (s_dynbits == FLG_SY_DYNSORT) 257333eb6ee1Sab wsdp->sd_flags |= 257433eb6ee1Sab FLG_SY_NODYNSORT; 25756b3ba5bdSAli Bahrami } else if (w_dynbits != 25766b3ba5bdSAli Bahrami FLG_SY_NODYNSORT) { 25776b3ba5bdSAli Bahrami ssdp->sd_flags |= 25786b3ba5bdSAli Bahrami FLG_SY_NODYNSORT; 2579d579eb63Sab } 25807c478bd9Sstevel@tonic-gate } 25816b3ba5bdSAli Bahrami break; 25827c478bd9Sstevel@tonic-gate } 25837c478bd9Sstevel@tonic-gate } 25847c478bd9Sstevel@tonic-gate } 25857c478bd9Sstevel@tonic-gate return (1); 258675e45495Sab 258775e45495Sab #undef SYM_LOC_BADADDR 25887c478bd9Sstevel@tonic-gate } 25897c478bd9Sstevel@tonic-gate 25907c478bd9Sstevel@tonic-gate /* 2591f5a18a30Srie * Add an undefined symbol to the symbol table. The reference originates from 2592f5a18a30Srie * the location identifed by the message id (mid). These references can 2593f5a18a30Srie * originate from command line options such as -e, -u, -initarray, etc. 2594f5a18a30Srie * (identified with MSG_INTL(MSG_STR_COMMAND)), or from internally generated 2595f5a18a30Srie * TLS relocation references (identified with MSG_INTL(MSG_STR_TLSREL)). 25967c478bd9Sstevel@tonic-gate */ 25977c478bd9Sstevel@tonic-gate Sym_desc * 2598f5a18a30Srie ld_sym_add_u(const char *name, Ofl_desc *ofl, Msg mid) 25997c478bd9Sstevel@tonic-gate { 26007c478bd9Sstevel@tonic-gate Sym *sym; 26016b3ba5bdSAli Bahrami Ifl_desc *ifl = NULL, *_ifl; 26027c478bd9Sstevel@tonic-gate Sym_desc *sdp; 26037c478bd9Sstevel@tonic-gate Word hash; 260457ef7aa9SRod Evans Aliste idx; 26057c478bd9Sstevel@tonic-gate avl_index_t where; 2606f5a18a30Srie const char *reference = MSG_INTL(mid); 26077c478bd9Sstevel@tonic-gate 26087c478bd9Sstevel@tonic-gate /* 2609b02637afSrie * As an optimization, determine whether we've already generated this 2610b02637afSrie * reference. If the symbol doesn't already exist we'll create it. 2611b02637afSrie * Or if the symbol does exist from a different source, we'll resolve 2612b02637afSrie * the conflict. 26137c478bd9Sstevel@tonic-gate */ 26147c478bd9Sstevel@tonic-gate /* LINTED */ 26157c478bd9Sstevel@tonic-gate hash = (Word)elf_hash(name); 2616b02637afSrie if ((sdp = ld_sym_find(name, hash, &where, ofl)) != NULL) { 2617b02637afSrie if ((sdp->sd_sym->st_shndx == SHN_UNDEF) && 2618b02637afSrie (sdp->sd_file->ifl_name == reference)) 2619b02637afSrie return (sdp); 26207c478bd9Sstevel@tonic-gate } 26217c478bd9Sstevel@tonic-gate 26227c478bd9Sstevel@tonic-gate /* 26237c478bd9Sstevel@tonic-gate * Determine whether a pseudo input file descriptor exists to represent 26247c478bd9Sstevel@tonic-gate * the command line, as any global symbol needs an input file descriptor 26257c478bd9Sstevel@tonic-gate * during any symbol resolution (refer to map_ifl() which provides a 26267c478bd9Sstevel@tonic-gate * similar method for adding symbols from mapfiles). 26277c478bd9Sstevel@tonic-gate */ 262857ef7aa9SRod Evans for (APLIST_TRAVERSE(ofl->ofl_objs, idx, _ifl)) 2629f5a18a30Srie if (strcmp(_ifl->ifl_name, reference) == 0) { 26307c478bd9Sstevel@tonic-gate ifl = _ifl; 26317c478bd9Sstevel@tonic-gate break; 26327c478bd9Sstevel@tonic-gate } 26337c478bd9Sstevel@tonic-gate 26347c478bd9Sstevel@tonic-gate /* 26357c478bd9Sstevel@tonic-gate * If no descriptor exists create one. 26367c478bd9Sstevel@tonic-gate */ 26376b3ba5bdSAli Bahrami if (ifl == NULL) { 263857ef7aa9SRod Evans if ((ifl = libld_calloc(sizeof (Ifl_desc), 1)) == NULL) 26397c478bd9Sstevel@tonic-gate return ((Sym_desc *)S_ERROR); 2640f5a18a30Srie ifl->ifl_name = reference; 26417c478bd9Sstevel@tonic-gate ifl->ifl_flags = FLG_IF_NEEDED | FLG_IF_FILEREF; 264257ef7aa9SRod Evans if ((ifl->ifl_ehdr = libld_calloc(sizeof (Ehdr), 1)) == NULL) 26437c478bd9Sstevel@tonic-gate return ((Sym_desc *)S_ERROR); 26447c478bd9Sstevel@tonic-gate ifl->ifl_ehdr->e_type = ET_REL; 26457c478bd9Sstevel@tonic-gate 264657ef7aa9SRod Evans if (aplist_append(&ofl->ofl_objs, ifl, AL_CNT_OFL_OBJS) == NULL) 26477c478bd9Sstevel@tonic-gate return ((Sym_desc *)S_ERROR); 26487c478bd9Sstevel@tonic-gate } 26497c478bd9Sstevel@tonic-gate 26507c478bd9Sstevel@tonic-gate /* 26517c478bd9Sstevel@tonic-gate * Allocate a symbol structure and add it to the global symbol table. 26527c478bd9Sstevel@tonic-gate */ 26536b3ba5bdSAli Bahrami if ((sym = libld_calloc(sizeof (Sym), 1)) == NULL) 26547c478bd9Sstevel@tonic-gate return ((Sym_desc *)S_ERROR); 26557c478bd9Sstevel@tonic-gate sym->st_info = ELF_ST_INFO(STB_GLOBAL, STT_NOTYPE); 26567c478bd9Sstevel@tonic-gate sym->st_shndx = SHN_UNDEF; 26577c478bd9Sstevel@tonic-gate 26585aefb655Srie DBG_CALL(Dbg_syms_process(ofl->ofl_lml, ifl)); 2659b02637afSrie if (sdp == NULL) { 2660b02637afSrie DBG_CALL(Dbg_syms_global(ofl->ofl_lml, 0, name)); 2661b02637afSrie if ((sdp = ld_sym_enter(name, sym, hash, ifl, ofl, 0, SHN_UNDEF, 2662b02637afSrie 0, 0, &where)) == (Sym_desc *)S_ERROR) 2663b02637afSrie return ((Sym_desc *)S_ERROR); 2664b02637afSrie } else if (ld_sym_resolve(sdp, sym, ifl, ofl, 0, 2665b02637afSrie SHN_UNDEF, 0) == S_ERROR) 2666b02637afSrie return ((Sym_desc *)S_ERROR); 2667b02637afSrie 26687c478bd9Sstevel@tonic-gate sdp->sd_flags &= ~FLG_SY_CLEAN; 26697c478bd9Sstevel@tonic-gate sdp->sd_flags |= FLG_SY_CMDREF; 26707c478bd9Sstevel@tonic-gate 26717c478bd9Sstevel@tonic-gate return (sdp); 26727c478bd9Sstevel@tonic-gate } 2673*4a8d0ea7SAli Bahrami 2674*4a8d0ea7SAli Bahrami /* 2675*4a8d0ea7SAli Bahrami * STT_SECTION symbols have their st_name field set to NULL, and consequently 2676*4a8d0ea7SAli Bahrami * have no name. Generate a name suitable for diagnostic use for such a symbol. 2677*4a8d0ea7SAli Bahrami * The resulting name will be of the form: 2678*4a8d0ea7SAli Bahrami * 2679*4a8d0ea7SAli Bahrami * "XXX (section)" 2680*4a8d0ea7SAli Bahrami * 2681*4a8d0ea7SAli Bahrami * where XXX is the name of the section. 2682*4a8d0ea7SAli Bahrami * 2683*4a8d0ea7SAli Bahrami * Diagnostics for STT_SECTION symbols tend to come in clusters, 2684*4a8d0ea7SAli Bahrami * so we use a static variable to retain the last string we generate. If 2685*4a8d0ea7SAli Bahrami * another one comes along for the same section before some other section 2686*4a8d0ea7SAli Bahrami * intervenes, we will reuse the string. 2687*4a8d0ea7SAli Bahrami * 2688*4a8d0ea7SAli Bahrami * entry: 2689*4a8d0ea7SAli Bahrami * isc - Input section assocated with the symbol. 2690*4a8d0ea7SAli Bahrami * fmt - NULL, or format string to use. 2691*4a8d0ea7SAli Bahrami * 2692*4a8d0ea7SAli Bahrami * exit: 2693*4a8d0ea7SAli Bahrami * Returns the allocated string, or NULL on allocation failure. 2694*4a8d0ea7SAli Bahrami */ 2695*4a8d0ea7SAli Bahrami const const char * 2696*4a8d0ea7SAli Bahrami ld_stt_section_sym_name(Is_desc *isp) 2697*4a8d0ea7SAli Bahrami { 2698*4a8d0ea7SAli Bahrami static const char *last_fmt; 2699*4a8d0ea7SAli Bahrami static Is_desc *last_isp = NULL; 2700*4a8d0ea7SAli Bahrami static char *namestr; 2701*4a8d0ea7SAli Bahrami 2702*4a8d0ea7SAli Bahrami const char *fmt; 2703*4a8d0ea7SAli Bahrami size_t len; 2704*4a8d0ea7SAli Bahrami 2705*4a8d0ea7SAli Bahrami if ((isp != NULL) && (isp->is_name != NULL)) { 2706*4a8d0ea7SAli Bahrami fmt = (isp->is_flags & FLG_IS_GNSTRMRG) ? 2707*4a8d0ea7SAli Bahrami MSG_INTL(MSG_STR_SECTION_MSTR) : MSG_INTL(MSG_STR_SECTION); 2708*4a8d0ea7SAli Bahrami 2709*4a8d0ea7SAli Bahrami if ((last_isp == isp) && (last_fmt == fmt)) 2710*4a8d0ea7SAli Bahrami return (namestr); 2711*4a8d0ea7SAli Bahrami 2712*4a8d0ea7SAli Bahrami len = strlen(fmt) + strlen(isp->is_name) + 1; 2713*4a8d0ea7SAli Bahrami 2714*4a8d0ea7SAli Bahrami if ((namestr = libld_malloc(len)) == 0) 2715*4a8d0ea7SAli Bahrami return (NULL); 2716*4a8d0ea7SAli Bahrami (void) snprintf(namestr, len, fmt, isp->is_name); 2717*4a8d0ea7SAli Bahrami 2718*4a8d0ea7SAli Bahrami /* Remember for next time */ 2719*4a8d0ea7SAli Bahrami last_fmt = fmt; 2720*4a8d0ea7SAli Bahrami last_isp = isp; 2721*4a8d0ea7SAli Bahrami 2722*4a8d0ea7SAli Bahrami return (namestr); 2723*4a8d0ea7SAli Bahrami } 2724*4a8d0ea7SAli Bahrami 2725*4a8d0ea7SAli Bahrami return (NULL); 2726*4a8d0ea7SAli Bahrami } 2727