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 * 27bf994817SAli Bahrami * Copyright (c) 1989, 2010, Oracle and/or its affiliates. All rights reserved. 287c478bd9Sstevel@tonic-gate */ 297c478bd9Sstevel@tonic-gate 307c478bd9Sstevel@tonic-gate /* 317c478bd9Sstevel@tonic-gate * Symbol table management routines 327c478bd9Sstevel@tonic-gate */ 33ba2be530Sab 34ba2be530Sab #define ELF_TARGET_AMD64 35ba2be530Sab 367c478bd9Sstevel@tonic-gate #include <stdio.h> 377c478bd9Sstevel@tonic-gate #include <string.h> 385aefb655Srie #include <debug.h> 397c478bd9Sstevel@tonic-gate #include "msg.h" 407c478bd9Sstevel@tonic-gate #include "_libld.h" 417c478bd9Sstevel@tonic-gate 427c478bd9Sstevel@tonic-gate /* 437c478bd9Sstevel@tonic-gate * AVL tree comparator function: 447c478bd9Sstevel@tonic-gate * 456b3ba5bdSAli Bahrami * The primary key is the symbol name hash with a secondary key of the symbol 466b3ba5bdSAli Bahrami * name itself. 477c478bd9Sstevel@tonic-gate */ 487c478bd9Sstevel@tonic-gate int 495aefb655Srie ld_sym_avl_comp(const void *elem1, const void *elem2) 507c478bd9Sstevel@tonic-gate { 517c478bd9Sstevel@tonic-gate Sym_avlnode *sav1 = (Sym_avlnode *)elem1; 527c478bd9Sstevel@tonic-gate Sym_avlnode *sav2 = (Sym_avlnode *)elem2; 536b3ba5bdSAli Bahrami int res; 547c478bd9Sstevel@tonic-gate 557c478bd9Sstevel@tonic-gate res = sav1->sav_hash - sav2->sav_hash; 567c478bd9Sstevel@tonic-gate 577c478bd9Sstevel@tonic-gate if (res < 0) 587c478bd9Sstevel@tonic-gate return (-1); 597c478bd9Sstevel@tonic-gate if (res > 0) 607c478bd9Sstevel@tonic-gate return (1); 617c478bd9Sstevel@tonic-gate 627c478bd9Sstevel@tonic-gate /* 637c478bd9Sstevel@tonic-gate * Hash is equal - now compare name 647c478bd9Sstevel@tonic-gate */ 657c478bd9Sstevel@tonic-gate res = strcmp(sav1->sav_name, sav2->sav_name); 667c478bd9Sstevel@tonic-gate if (res == 0) 677c478bd9Sstevel@tonic-gate return (0); 687c478bd9Sstevel@tonic-gate if (res > 0) 697c478bd9Sstevel@tonic-gate return (1); 707c478bd9Sstevel@tonic-gate return (-1); 717c478bd9Sstevel@tonic-gate } 727c478bd9Sstevel@tonic-gate 737c478bd9Sstevel@tonic-gate /* 747c478bd9Sstevel@tonic-gate * Focal point for verifying symbol names. 757c478bd9Sstevel@tonic-gate */ 76a194faf8Srie inline static const char * 775aefb655Srie string(Ofl_desc *ofl, Ifl_desc *ifl, Sym *sym, const char *strs, size_t strsize, 784a8d0ea7SAli Bahrami int symndx, Word shndx, Word symsecndx, const char *symsecname, 79635216b6SRod Evans const char *strsecname, sd_flag_t *flags) 807c478bd9Sstevel@tonic-gate { 816b3ba5bdSAli Bahrami Word name = sym->st_name; 827c478bd9Sstevel@tonic-gate 837c478bd9Sstevel@tonic-gate if (name) { 847c478bd9Sstevel@tonic-gate if ((ifl->ifl_flags & FLG_IF_HSTRTAB) == 0) { 851007fd6fSAli Bahrami ld_eprintf(ofl, ERR_FATAL, MSG_INTL(MSG_FIL_NOSTRTABLE), 861007fd6fSAli Bahrami ifl->ifl_name, EC_WORD(symsecndx), symsecname, 871007fd6fSAli Bahrami symndx, EC_XWORD(name)); 886b3ba5bdSAli Bahrami return (NULL); 897c478bd9Sstevel@tonic-gate } 907c478bd9Sstevel@tonic-gate if (name >= (Word)strsize) { 911007fd6fSAli Bahrami ld_eprintf(ofl, ERR_FATAL, 925aefb655Srie MSG_INTL(MSG_FIL_EXCSTRTABLE), ifl->ifl_name, 934a8d0ea7SAli Bahrami EC_WORD(symsecndx), symsecname, symndx, 944a8d0ea7SAli Bahrami EC_XWORD(name), strsecname, EC_XWORD(strsize)); 956b3ba5bdSAli Bahrami return (NULL); 967c478bd9Sstevel@tonic-gate } 977c478bd9Sstevel@tonic-gate } 987c478bd9Sstevel@tonic-gate 997c478bd9Sstevel@tonic-gate /* 1007c478bd9Sstevel@tonic-gate * Determine if we're dealing with a register and if so validate it. 1017c478bd9Sstevel@tonic-gate * If it's a scratch register, a fabricated name will be returned. 1027c478bd9Sstevel@tonic-gate */ 103ba2be530Sab if (ld_targ.t_ms.ms_is_regsym != NULL) { 104ba2be530Sab const char *regname = (*ld_targ.t_ms.ms_is_regsym)(ofl, ifl, 105ba2be530Sab sym, strs, symndx, shndx, symsecname, flags); 106ba2be530Sab 107ba2be530Sab if (regname == (const char *)S_ERROR) { 1086b3ba5bdSAli Bahrami return (NULL); 109ba2be530Sab } 110ba2be530Sab if (regname) 111ba2be530Sab return (regname); 1127c478bd9Sstevel@tonic-gate } 1137c478bd9Sstevel@tonic-gate 1147c478bd9Sstevel@tonic-gate /* 1157c478bd9Sstevel@tonic-gate * If this isn't a register, but we have a global symbol with a null 1167c478bd9Sstevel@tonic-gate * name, we're not going to be able to hash this, search for it, or 1177c478bd9Sstevel@tonic-gate * do anything interesting. However, we've been accepting a symbol of 1187c478bd9Sstevel@tonic-gate * this kind for ages now, so give the user a warning (rather than a 1197c478bd9Sstevel@tonic-gate * fatal error), just in case this instance exists somewhere in the 1207c478bd9Sstevel@tonic-gate * world and hasn't, as yet, been a problem. 1217c478bd9Sstevel@tonic-gate */ 1227c478bd9Sstevel@tonic-gate if ((name == 0) && (ELF_ST_BIND(sym->st_info) != STB_LOCAL)) { 1231007fd6fSAli Bahrami ld_eprintf(ofl, ERR_WARNING, MSG_INTL(MSG_FIL_NONAMESYM), 1244a8d0ea7SAli Bahrami ifl->ifl_name, EC_WORD(symsecndx), symsecname, symndx, 1254a8d0ea7SAli Bahrami EC_XWORD(name)); 1267c478bd9Sstevel@tonic-gate } 1277c478bd9Sstevel@tonic-gate return (strs + name); 1287c478bd9Sstevel@tonic-gate } 1297c478bd9Sstevel@tonic-gate 130ba2be530Sab /* 131ba2be530Sab * For producing symbol names strings to use in error messages. 132ba2be530Sab * If the symbol has a non-null name, then the string returned by 133ba2be530Sab * this function is the output from demangle(), surrounded by 134ba2be530Sab * single quotes. For null names, a descriptive string giving 135ba2be530Sab * the symbol section and index is generated. 136ba2be530Sab * 137ba2be530Sab * This function uses an internal static buffer to hold the resulting 138ba2be530Sab * string. The value returned is usable by the caller until the next 139ba2be530Sab * call, at which point it is overwritten. 140ba2be530Sab */ 141ba2be530Sab static const char * 142ba2be530Sab demangle_symname(const char *name, const char *symtab_name, Word symndx) 143ba2be530Sab { 144ba2be530Sab #define INIT_BUFSIZE 256 145ba2be530Sab 1466b3ba5bdSAli Bahrami static char *buf; 1476b3ba5bdSAli Bahrami static size_t bufsize = 0; 148ba2be530Sab size_t len; 149ba2be530Sab int use_name; 150ba2be530Sab 151ba2be530Sab use_name = (name != NULL) && (*name != '\0'); 152ba2be530Sab 153ba2be530Sab if (use_name) { 154ba2be530Sab name = demangle(name); 155ba2be530Sab len = strlen(name) + 2; /* Include room for quotes */ 156ba2be530Sab } else { 157ba2be530Sab name = MSG_ORIG(MSG_STR_EMPTY); 1584f680cc6SAli Bahrami len = strlen(symtab_name) + 2 + CONV_INV_BUFSIZE; 159ba2be530Sab } 160ba2be530Sab len++; /* Null termination */ 161ba2be530Sab 162ba2be530Sab /* If our buffer is too small, double it until it is big enough */ 163ba2be530Sab if (len > bufsize) { 164ba2be530Sab size_t new_bufsize = bufsize; 165ba2be530Sab char *new_buf; 166ba2be530Sab 167ba2be530Sab if (new_bufsize == 0) 168ba2be530Sab new_bufsize = INIT_BUFSIZE; 169ba2be530Sab while (len > new_bufsize) 170ba2be530Sab new_bufsize *= 2; 1716b3ba5bdSAli Bahrami if ((new_buf = libld_malloc(new_bufsize)) == NULL) 172ba2be530Sab return (name); 173ba2be530Sab buf = new_buf; 174ba2be530Sab bufsize = new_bufsize; 175ba2be530Sab } 176ba2be530Sab 177ba2be530Sab if (use_name) { 178ba2be530Sab (void) snprintf(buf, bufsize, MSG_ORIG(MSG_FMT_SYMNAM), name); 179ba2be530Sab } else { 180ba2be530Sab (void) snprintf(buf, bufsize, MSG_ORIG(MSG_FMT_NULLSYMNAM), 181ba2be530Sab symtab_name, EC_WORD(symndx)); 182ba2be530Sab } 183ba2be530Sab 184ba2be530Sab return (buf); 185ba2be530Sab 186ba2be530Sab #undef INIT_BUFSIZE 187ba2be530Sab } 188ba2be530Sab 1897c478bd9Sstevel@tonic-gate /* 1907c478bd9Sstevel@tonic-gate * Shared objects can be built that define specific symbols that can not be 1917c478bd9Sstevel@tonic-gate * directly bound to. These objects have a syminfo section (and an associated 1927c478bd9Sstevel@tonic-gate * DF_1_NODIRECT dynamic flags entry). Scan this table looking for symbols 1937c478bd9Sstevel@tonic-gate * that can't be bound to directly, and if this files symbol is presently 1947c478bd9Sstevel@tonic-gate * referenced, mark it so that we don't directly bind to it. 1957c478bd9Sstevel@tonic-gate */ 1967c478bd9Sstevel@tonic-gate uintptr_t 1979a411307Srie ld_sym_nodirect(Is_desc *isp, Ifl_desc *ifl, Ofl_desc *ofl) 1987c478bd9Sstevel@tonic-gate { 1997c478bd9Sstevel@tonic-gate Shdr *sifshdr, *symshdr; 2007c478bd9Sstevel@tonic-gate Syminfo *sifdata; 2017c478bd9Sstevel@tonic-gate Sym *symdata; 2027c478bd9Sstevel@tonic-gate char *strdata; 2037c478bd9Sstevel@tonic-gate ulong_t cnt, _cnt; 2047c478bd9Sstevel@tonic-gate 2057c478bd9Sstevel@tonic-gate /* 2067c478bd9Sstevel@tonic-gate * Get the syminfo data, and determine the number of entries. 2077c478bd9Sstevel@tonic-gate */ 2087c478bd9Sstevel@tonic-gate sifshdr = isp->is_shdr; 2097c478bd9Sstevel@tonic-gate sifdata = (Syminfo *)isp->is_indata->d_buf; 2107c478bd9Sstevel@tonic-gate cnt = sifshdr->sh_size / sifshdr->sh_entsize; 2117c478bd9Sstevel@tonic-gate 2127c478bd9Sstevel@tonic-gate /* 2137c478bd9Sstevel@tonic-gate * Get the associated symbol table. 2147c478bd9Sstevel@tonic-gate */ 21528bda19cSRod Evans if ((sifshdr->sh_link == 0) || (sifshdr->sh_link >= ifl->ifl_shnum)) { 21628bda19cSRod Evans /* 21728bda19cSRod Evans * Broken input file 21828bda19cSRod Evans */ 2191007fd6fSAli Bahrami ld_eprintf(ofl, ERR_FATAL, MSG_INTL(MSG_FIL_INVSHINFO), 22028bda19cSRod Evans ifl->ifl_name, isp->is_name, EC_XWORD(sifshdr->sh_link)); 22128bda19cSRod Evans return (0); 22228bda19cSRod Evans } 2237c478bd9Sstevel@tonic-gate symshdr = ifl->ifl_isdesc[sifshdr->sh_link]->is_shdr; 2247c478bd9Sstevel@tonic-gate symdata = ifl->ifl_isdesc[sifshdr->sh_link]->is_indata->d_buf; 2257c478bd9Sstevel@tonic-gate 2267c478bd9Sstevel@tonic-gate /* 2277c478bd9Sstevel@tonic-gate * Get the string table associated with the symbol table. 2287c478bd9Sstevel@tonic-gate */ 2297c478bd9Sstevel@tonic-gate strdata = ifl->ifl_isdesc[symshdr->sh_link]->is_indata->d_buf; 2307c478bd9Sstevel@tonic-gate 2317c478bd9Sstevel@tonic-gate /* 2327c478bd9Sstevel@tonic-gate * Traverse the syminfo data for symbols that can't be directly 2337c478bd9Sstevel@tonic-gate * bound to. 2347c478bd9Sstevel@tonic-gate */ 2357c478bd9Sstevel@tonic-gate for (_cnt = 1, sifdata++; _cnt < cnt; _cnt++, sifdata++) { 2367c478bd9Sstevel@tonic-gate Sym *sym; 2377c478bd9Sstevel@tonic-gate char *str; 2387c478bd9Sstevel@tonic-gate Sym_desc *sdp; 2397c478bd9Sstevel@tonic-gate 2403c4993fbSrie if ((sifdata->si_flags & SYMINFO_FLG_NOEXTDIRECT) == 0) 2417c478bd9Sstevel@tonic-gate continue; 2427c478bd9Sstevel@tonic-gate 2437c478bd9Sstevel@tonic-gate sym = (Sym *)(symdata + _cnt); 2447c478bd9Sstevel@tonic-gate str = (char *)(strdata + sym->st_name); 2457c478bd9Sstevel@tonic-gate 24628bda19cSRod Evans if ((sdp = ld_sym_find(str, SYM_NOHASH, NULL, ofl)) != NULL) { 2477c478bd9Sstevel@tonic-gate if (ifl != sdp->sd_file) 2487c478bd9Sstevel@tonic-gate continue; 2497c478bd9Sstevel@tonic-gate 250635216b6SRod Evans sdp->sd_flags &= ~FLG_SY_DIR; 251635216b6SRod Evans sdp->sd_flags |= FLG_SY_NDIR; 2527c478bd9Sstevel@tonic-gate } 2537c478bd9Sstevel@tonic-gate } 2547c478bd9Sstevel@tonic-gate return (0); 2557c478bd9Sstevel@tonic-gate } 2567c478bd9Sstevel@tonic-gate 2577c478bd9Sstevel@tonic-gate /* 2587c478bd9Sstevel@tonic-gate * If, during symbol processing, it is necessary to update a local symbols 2597c478bd9Sstevel@tonic-gate * contents before we have generated the symbol tables in the output image, 2607c478bd9Sstevel@tonic-gate * create a new symbol structure and copy the original symbol contents. While 2617c478bd9Sstevel@tonic-gate * we are processing the input files, their local symbols are part of the 2627c478bd9Sstevel@tonic-gate * read-only mapped image. Commonly, these symbols are copied to the new output 2637c478bd9Sstevel@tonic-gate * file image and then updated to reflect their new address and any change in 2647c478bd9Sstevel@tonic-gate * attributes. However, sometimes during relocation counting, it is necessary 2657c478bd9Sstevel@tonic-gate * to adjust the symbols information. This routine provides for the generation 2667c478bd9Sstevel@tonic-gate * of a new symbol image so that this update can be performed. 2677c478bd9Sstevel@tonic-gate * All global symbols are copied to an internal symbol table to improve locality 2687c478bd9Sstevel@tonic-gate * of reference and hence performance, and thus this copying is not necessary. 2697c478bd9Sstevel@tonic-gate */ 2707c478bd9Sstevel@tonic-gate uintptr_t 2715aefb655Srie ld_sym_copy(Sym_desc *sdp) 2727c478bd9Sstevel@tonic-gate { 2737c478bd9Sstevel@tonic-gate Sym *nsym; 2747c478bd9Sstevel@tonic-gate 2757c478bd9Sstevel@tonic-gate if (sdp->sd_flags & FLG_SY_CLEAN) { 2766b3ba5bdSAli Bahrami if ((nsym = libld_malloc(sizeof (Sym))) == NULL) 2777c478bd9Sstevel@tonic-gate return (S_ERROR); 2787c478bd9Sstevel@tonic-gate *nsym = *(sdp->sd_sym); 2797c478bd9Sstevel@tonic-gate sdp->sd_sym = nsym; 2807c478bd9Sstevel@tonic-gate sdp->sd_flags &= ~FLG_SY_CLEAN; 2817c478bd9Sstevel@tonic-gate } 2827c478bd9Sstevel@tonic-gate return (1); 2837c478bd9Sstevel@tonic-gate } 2847c478bd9Sstevel@tonic-gate 2857c478bd9Sstevel@tonic-gate /* 2867c478bd9Sstevel@tonic-gate * Finds a given name in the link editors internal symbol table. If no 2877c478bd9Sstevel@tonic-gate * hash value is specified it is calculated. A pointer to the located 2887c478bd9Sstevel@tonic-gate * Sym_desc entry is returned, or NULL if the symbol is not found. 2897c478bd9Sstevel@tonic-gate */ 2907c478bd9Sstevel@tonic-gate Sym_desc * 2915aefb655Srie ld_sym_find(const char *name, Word hash, avl_index_t *where, Ofl_desc *ofl) 2927c478bd9Sstevel@tonic-gate { 2936b3ba5bdSAli Bahrami Sym_avlnode qsav, *sav; 2947c478bd9Sstevel@tonic-gate 2957c478bd9Sstevel@tonic-gate if (hash == SYM_NOHASH) 2967c478bd9Sstevel@tonic-gate /* LINTED */ 2977c478bd9Sstevel@tonic-gate hash = (Word)elf_hash((const char *)name); 2987c478bd9Sstevel@tonic-gate qsav.sav_hash = hash; 2997c478bd9Sstevel@tonic-gate qsav.sav_name = name; 3007c478bd9Sstevel@tonic-gate 3017c478bd9Sstevel@tonic-gate /* 3027c478bd9Sstevel@tonic-gate * Perform search for symbol in AVL tree. Note that the 'where' field 3037c478bd9Sstevel@tonic-gate * is passed in from the caller. If a 'where' is present, it can be 304a194faf8Srie * used in subsequent 'ld_sym_enter()' calls if required. 3057c478bd9Sstevel@tonic-gate */ 3067c478bd9Sstevel@tonic-gate sav = avl_find(&ofl->ofl_symavl, &qsav, where); 3077c478bd9Sstevel@tonic-gate 3087c478bd9Sstevel@tonic-gate /* 3097c478bd9Sstevel@tonic-gate * If symbol was not found in the avl tree, return null to show that. 3107c478bd9Sstevel@tonic-gate */ 3116b3ba5bdSAli Bahrami if (sav == NULL) 3126b3ba5bdSAli Bahrami return (NULL); 3137c478bd9Sstevel@tonic-gate 3147c478bd9Sstevel@tonic-gate /* 3157c478bd9Sstevel@tonic-gate * Return symbol found. 3167c478bd9Sstevel@tonic-gate */ 317635216b6SRod Evans return (sav->sav_sdp); 3187c478bd9Sstevel@tonic-gate } 3197c478bd9Sstevel@tonic-gate 3207c478bd9Sstevel@tonic-gate /* 3217c478bd9Sstevel@tonic-gate * Enter a new symbol into the link editors internal symbol table. 3227c478bd9Sstevel@tonic-gate * If the symbol is from an input file, information regarding the input file 3237c478bd9Sstevel@tonic-gate * and input section is also recorded. Otherwise (file == NULL) the symbol 3247c478bd9Sstevel@tonic-gate * has been internally generated (ie. _etext, _edata, etc.). 3257c478bd9Sstevel@tonic-gate */ 3267c478bd9Sstevel@tonic-gate Sym_desc * 3275aefb655Srie ld_sym_enter(const char *name, Sym *osym, Word hash, Ifl_desc *ifl, 328635216b6SRod Evans Ofl_desc *ofl, Word ndx, Word shndx, sd_flag_t sdflags, avl_index_t *where) 3297c478bd9Sstevel@tonic-gate { 3307c478bd9Sstevel@tonic-gate Sym_desc *sdp; 3317c478bd9Sstevel@tonic-gate Sym_aux *sap; 3327c478bd9Sstevel@tonic-gate Sym_avlnode *savl; 3337c478bd9Sstevel@tonic-gate char *_name; 3347c478bd9Sstevel@tonic-gate Sym *nsym; 3357c478bd9Sstevel@tonic-gate Half etype; 33660758829Srie uchar_t vis; 3377c478bd9Sstevel@tonic-gate avl_index_t _where; 3387c478bd9Sstevel@tonic-gate 3397c478bd9Sstevel@tonic-gate /* 3407c478bd9Sstevel@tonic-gate * Establish the file type. 3417c478bd9Sstevel@tonic-gate */ 3427c478bd9Sstevel@tonic-gate if (ifl) 3437c478bd9Sstevel@tonic-gate etype = ifl->ifl_ehdr->e_type; 3447c478bd9Sstevel@tonic-gate else 3457c478bd9Sstevel@tonic-gate etype = ET_NONE; 3467c478bd9Sstevel@tonic-gate 3477c478bd9Sstevel@tonic-gate ofl->ofl_entercnt++; 3487c478bd9Sstevel@tonic-gate 3497c478bd9Sstevel@tonic-gate /* 3507c478bd9Sstevel@tonic-gate * Allocate a Sym Descriptor, Auxiliary Descriptor, and a Sym AVLNode - 3517c478bd9Sstevel@tonic-gate * contiguously. 3527c478bd9Sstevel@tonic-gate */ 353635216b6SRod Evans if ((savl = libld_calloc(S_DROUND(sizeof (Sym_avlnode)) + 354635216b6SRod Evans S_DROUND(sizeof (Sym_desc)) + 355635216b6SRod Evans S_DROUND(sizeof (Sym_aux)), 1)) == NULL) 3567c478bd9Sstevel@tonic-gate return ((Sym_desc *)S_ERROR); 357635216b6SRod Evans sdp = (Sym_desc *)((uintptr_t)savl + 358635216b6SRod Evans S_DROUND(sizeof (Sym_avlnode))); 359635216b6SRod Evans sap = (Sym_aux *)((uintptr_t)sdp + 360635216b6SRod Evans S_DROUND(sizeof (Sym_desc))); 3617c478bd9Sstevel@tonic-gate 362635216b6SRod Evans savl->sav_sdp = sdp; 3637c478bd9Sstevel@tonic-gate sdp->sd_file = ifl; 3647c478bd9Sstevel@tonic-gate sdp->sd_aux = sap; 3657c478bd9Sstevel@tonic-gate savl->sav_hash = sap->sa_hash = hash; 3667c478bd9Sstevel@tonic-gate 3677c478bd9Sstevel@tonic-gate /* 3687c478bd9Sstevel@tonic-gate * Copy the symbol table entry from the input file into the internal 3697c478bd9Sstevel@tonic-gate * entry and have the symbol descriptor use it. 3707c478bd9Sstevel@tonic-gate */ 3717c478bd9Sstevel@tonic-gate sdp->sd_sym = nsym = &sap->sa_sym; 3727c478bd9Sstevel@tonic-gate *nsym = *osym; 3737c478bd9Sstevel@tonic-gate sdp->sd_shndx = shndx; 3747c478bd9Sstevel@tonic-gate sdp->sd_flags |= sdflags; 3757c478bd9Sstevel@tonic-gate 3766b3ba5bdSAli Bahrami if ((_name = libld_malloc(strlen(name) + 1)) == NULL) 3777c478bd9Sstevel@tonic-gate return ((Sym_desc *)S_ERROR); 3787c478bd9Sstevel@tonic-gate savl->sav_name = sdp->sd_name = (const char *)strcpy(_name, name); 3797c478bd9Sstevel@tonic-gate 3807c478bd9Sstevel@tonic-gate /* 3817c478bd9Sstevel@tonic-gate * Enter Symbol in AVL tree. 3827c478bd9Sstevel@tonic-gate */ 3837c478bd9Sstevel@tonic-gate if (where == 0) { 3847c478bd9Sstevel@tonic-gate /* LINTED */ 3857c478bd9Sstevel@tonic-gate Sym_avlnode *_savl; 3867c478bd9Sstevel@tonic-gate /* 3875aefb655Srie * If a previous ld_sym_find() hasn't initialized 'where' do it 3887c478bd9Sstevel@tonic-gate * now. 3897c478bd9Sstevel@tonic-gate */ 3907c478bd9Sstevel@tonic-gate where = &_where; 3917c478bd9Sstevel@tonic-gate _savl = avl_find(&ofl->ofl_symavl, savl, where); 3926b3ba5bdSAli Bahrami assert(_savl == NULL); 3937c478bd9Sstevel@tonic-gate } 3947c478bd9Sstevel@tonic-gate avl_insert(&ofl->ofl_symavl, savl, *where); 3957c478bd9Sstevel@tonic-gate 3967c478bd9Sstevel@tonic-gate /* 3977c478bd9Sstevel@tonic-gate * Record the section index. This is possible because the 3987c478bd9Sstevel@tonic-gate * `ifl_isdesc' table is filled before we start symbol processing. 3997c478bd9Sstevel@tonic-gate */ 4000bc07c75Srie if ((sdflags & FLG_SY_SPECSEC) || (nsym->st_shndx == SHN_UNDEF)) 4017c478bd9Sstevel@tonic-gate sdp->sd_isc = NULL; 4027c478bd9Sstevel@tonic-gate else { 4037c478bd9Sstevel@tonic-gate sdp->sd_isc = ifl->ifl_isdesc[shndx]; 4047c478bd9Sstevel@tonic-gate 4057c478bd9Sstevel@tonic-gate /* 4067c478bd9Sstevel@tonic-gate * If this symbol is from a relocatable object, make sure that 4077c478bd9Sstevel@tonic-gate * it is still associated with a section. For example, an 4087c478bd9Sstevel@tonic-gate * unknown section type (SHT_NULL) would have been rejected on 4097c478bd9Sstevel@tonic-gate * input with a warning. Here, we make the use of the symbol 4107c478bd9Sstevel@tonic-gate * fatal. A symbol descriptor is still returned, so that the 4117c478bd9Sstevel@tonic-gate * caller can continue processing all symbols, and hence flush 4127c478bd9Sstevel@tonic-gate * out as many error conditions as possible. 4137c478bd9Sstevel@tonic-gate */ 4146b3ba5bdSAli Bahrami if ((etype == ET_REL) && (sdp->sd_isc == NULL)) { 4151007fd6fSAli Bahrami ld_eprintf(ofl, ERR_FATAL, MSG_INTL(MSG_SYM_INVSEC), 4161007fd6fSAli Bahrami name, ifl->ifl_name, EC_XWORD(shndx)); 4177c478bd9Sstevel@tonic-gate return (sdp); 4187c478bd9Sstevel@tonic-gate } 4197c478bd9Sstevel@tonic-gate } 4207c478bd9Sstevel@tonic-gate 4217c478bd9Sstevel@tonic-gate /* 4227c478bd9Sstevel@tonic-gate * Mark any COMMON symbols as 'tentative'. 4237c478bd9Sstevel@tonic-gate */ 42454d82594Sseizo if (sdflags & FLG_SY_SPECSEC) { 4250bc07c75Srie if (nsym->st_shndx == SHN_COMMON) 42654d82594Sseizo sdp->sd_flags |= FLG_SY_TENTSYM; 427ba2be530Sab #if defined(_ELF64) 428ba2be530Sab else if ((ld_targ.t_m.m_mach == EM_AMD64) && 429ba2be530Sab (nsym->st_shndx == SHN_X86_64_LCOMMON)) 43054d82594Sseizo sdp->sd_flags |= FLG_SY_TENTSYM; 43154d82594Sseizo #endif 43254d82594Sseizo } 4337c478bd9Sstevel@tonic-gate 4347c478bd9Sstevel@tonic-gate /* 43560758829Srie * Establish the symbols visibility and reference. 4367c478bd9Sstevel@tonic-gate */ 43760758829Srie vis = ELF_ST_VISIBILITY(nsym->st_other); 43860758829Srie 4397c478bd9Sstevel@tonic-gate if ((etype == ET_NONE) || (etype == ET_REL)) { 44060758829Srie switch (vis) { 44160758829Srie case STV_DEFAULT: 442635216b6SRod Evans sdp->sd_flags |= FLG_SY_DEFAULT; 44360758829Srie break; 44460758829Srie case STV_INTERNAL: 44560758829Srie case STV_HIDDEN: 446635216b6SRod Evans sdp->sd_flags |= FLG_SY_HIDDEN; 44760758829Srie break; 44860758829Srie case STV_PROTECTED: 449635216b6SRod Evans sdp->sd_flags |= FLG_SY_PROTECT; 45060758829Srie break; 45160758829Srie case STV_EXPORTED: 452635216b6SRod Evans sdp->sd_flags |= FLG_SY_EXPORT; 45360758829Srie break; 45460758829Srie case STV_SINGLETON: 455635216b6SRod Evans sdp->sd_flags |= (FLG_SY_SINGLE | FLG_SY_NDIR); 45628bda19cSRod Evans ofl->ofl_flags1 |= (FLG_OF1_NDIRECT | FLG_OF1_NGLBDIR); 45760758829Srie break; 45860758829Srie case STV_ELIMINATE: 459635216b6SRod Evans sdp->sd_flags |= (FLG_SY_HIDDEN | FLG_SY_ELIM); 46060758829Srie break; 46160758829Srie default: 46260758829Srie assert(vis <= STV_ELIMINATE); 46360758829Srie } 46460758829Srie 4657c478bd9Sstevel@tonic-gate sdp->sd_ref = REF_REL_NEED; 4667c478bd9Sstevel@tonic-gate 4677c478bd9Sstevel@tonic-gate /* 4689a411307Srie * Under -Bnodirect, all exported interfaces that have not 4699a411307Srie * explicitly been defined protected or directly bound to, are 4709a411307Srie * tagged to prevent direct binding. 4717c478bd9Sstevel@tonic-gate */ 4720bc07c75Srie if ((ofl->ofl_flags1 & FLG_OF1_ALNODIR) && 473635216b6SRod Evans ((sdp->sd_flags & (FLG_SY_PROTECT | FLG_SY_DIR)) == 0) && 4749a411307Srie (nsym->st_shndx != SHN_UNDEF)) { 475635216b6SRod Evans sdp->sd_flags |= FLG_SY_NDIR; 4769a411307Srie } 4777c478bd9Sstevel@tonic-gate } else { 4787c478bd9Sstevel@tonic-gate sdp->sd_ref = REF_DYN_SEEN; 4797c478bd9Sstevel@tonic-gate 4807c478bd9Sstevel@tonic-gate /* 48160758829Srie * If this is a protected symbol, remember this. Note, this 482635216b6SRod Evans * state is different from the FLG_SY_PROTECT used to establish 48360758829Srie * a symbol definitions visibility. This state is used to warn 48460758829Srie * against possible copy relocations against this referenced 48560758829Srie * symbol. 4867c478bd9Sstevel@tonic-gate */ 48760758829Srie if (vis == STV_PROTECTED) 4887c478bd9Sstevel@tonic-gate sdp->sd_flags |= FLG_SY_PROT; 4897c478bd9Sstevel@tonic-gate 4907c478bd9Sstevel@tonic-gate /* 49160758829Srie * If this is a SINGLETON definition, then indicate the symbol 49260758829Srie * can not be directly bound to, and retain the visibility. 49360758829Srie * This visibility will be inherited by any references made to 49460758829Srie * this symbol. 4957c478bd9Sstevel@tonic-gate */ 49660758829Srie if ((vis == STV_SINGLETON) && (nsym->st_shndx != SHN_UNDEF)) 497635216b6SRod Evans sdp->sd_flags |= (FLG_SY_SINGLE | FLG_SY_NDIR); 4987c478bd9Sstevel@tonic-gate 4997c478bd9Sstevel@tonic-gate /* 50060758829Srie * If the new symbol is from a shared library and is associated 50160758829Srie * with a SHT_NOBITS section then this symbol originated from a 50260758829Srie * tentative symbol. 5037c478bd9Sstevel@tonic-gate */ 5047c478bd9Sstevel@tonic-gate if (sdp->sd_isc && 5057c478bd9Sstevel@tonic-gate (sdp->sd_isc->is_shdr->sh_type == SHT_NOBITS)) 5067c478bd9Sstevel@tonic-gate sdp->sd_flags |= FLG_SY_TENTSYM; 5077c478bd9Sstevel@tonic-gate } 5087c478bd9Sstevel@tonic-gate 5097c478bd9Sstevel@tonic-gate /* 5107c478bd9Sstevel@tonic-gate * Reclassify any SHN_SUNW_IGNORE symbols to SHN_UNDEF so as to 5110bc07c75Srie * simplify future processing. 5127c478bd9Sstevel@tonic-gate */ 5130bc07c75Srie if (nsym->st_shndx == SHN_SUNW_IGNORE) { 5147c478bd9Sstevel@tonic-gate sdp->sd_shndx = shndx = SHN_UNDEF; 515635216b6SRod Evans sdp->sd_flags |= (FLG_SY_REDUCED | 516635216b6SRod Evans FLG_SY_HIDDEN | FLG_SY_IGNORE | FLG_SY_ELIM); 5177c478bd9Sstevel@tonic-gate } 5187c478bd9Sstevel@tonic-gate 5197c478bd9Sstevel@tonic-gate /* 5207c478bd9Sstevel@tonic-gate * If this is an undefined, or common symbol from a relocatable object 5217c478bd9Sstevel@tonic-gate * determine whether it is a global or weak reference (see build_osym(), 5227c478bd9Sstevel@tonic-gate * where REF_DYN_NEED definitions are returned back to undefines). 5237c478bd9Sstevel@tonic-gate */ 52454d82594Sseizo if ((etype == ET_REL) && 52554d82594Sseizo (ELF_ST_BIND(nsym->st_info) == STB_GLOBAL) && 5260bc07c75Srie ((nsym->st_shndx == SHN_UNDEF) || ((sdflags & FLG_SY_SPECSEC) && 527ba2be530Sab #if defined(_ELF64) 5280bc07c75Srie ((nsym->st_shndx == SHN_COMMON) || 529ba2be530Sab ((ld_targ.t_m.m_mach == EM_AMD64) && 530ba2be530Sab (nsym->st_shndx == SHN_X86_64_LCOMMON)))))) 53154d82594Sseizo #else 53233eb6ee1Sab /* BEGIN CSTYLED */ 5330bc07c75Srie (nsym->st_shndx == SHN_COMMON)))) 53433eb6ee1Sab /* END CSTYLED */ 53554d82594Sseizo #endif 5367c478bd9Sstevel@tonic-gate sdp->sd_flags |= FLG_SY_GLOBREF; 5377c478bd9Sstevel@tonic-gate 5387c478bd9Sstevel@tonic-gate /* 5397c478bd9Sstevel@tonic-gate * Record the input filename on the referenced or defined files list 5407c478bd9Sstevel@tonic-gate * for possible later diagnostics. The `sa_rfile' pointer contains the 5417c478bd9Sstevel@tonic-gate * name of the file that first referenced this symbol and is used to 5427c478bd9Sstevel@tonic-gate * generate undefined symbol diagnostics (refer to sym_undef_entry()). 5437c478bd9Sstevel@tonic-gate * Note that this entry can be overridden if a reference from a 5447c478bd9Sstevel@tonic-gate * relocatable object is found after a reference from a shared object 5457c478bd9Sstevel@tonic-gate * (refer to sym_override()). 5467c478bd9Sstevel@tonic-gate * The `sa_dfiles' list is used to maintain the list of files that 5477c478bd9Sstevel@tonic-gate * define the same symbol. This list can be used for two reasons: 5487c478bd9Sstevel@tonic-gate * 54908278a5eSRod Evans * - To save the first definition of a symbol that is not available 5507c478bd9Sstevel@tonic-gate * for this link-edit. 5517c478bd9Sstevel@tonic-gate * 55208278a5eSRod Evans * - To save all definitions of a symbol when the -m option is in 5537c478bd9Sstevel@tonic-gate * effect. This is optional as it is used to list multiple 5547c478bd9Sstevel@tonic-gate * (interposed) definitions of a symbol (refer to ldmap_out()), 5557c478bd9Sstevel@tonic-gate * and can be quite expensive. 5567c478bd9Sstevel@tonic-gate */ 5570bc07c75Srie if (nsym->st_shndx == SHN_UNDEF) { 5587c478bd9Sstevel@tonic-gate sap->sa_rfile = ifl->ifl_name; 5597c478bd9Sstevel@tonic-gate } else { 5607c478bd9Sstevel@tonic-gate if (sdp->sd_ref == REF_DYN_SEEN) { 5617c478bd9Sstevel@tonic-gate /* 5627c478bd9Sstevel@tonic-gate * A symbol is determined to be unavailable if it 5637c478bd9Sstevel@tonic-gate * belongs to a version of a shared object that this 5647c478bd9Sstevel@tonic-gate * user does not wish to use, or if it belongs to an 5657c478bd9Sstevel@tonic-gate * implicit shared object. 5667c478bd9Sstevel@tonic-gate */ 5677c478bd9Sstevel@tonic-gate if (ifl->ifl_vercnt) { 5689039eeafSab Ver_index *vip; 5697c478bd9Sstevel@tonic-gate Half vndx = ifl->ifl_versym[ndx]; 5707c478bd9Sstevel@tonic-gate 5717c478bd9Sstevel@tonic-gate sap->sa_dverndx = vndx; 5727c478bd9Sstevel@tonic-gate vip = &ifl->ifl_verndx[vndx]; 5737c478bd9Sstevel@tonic-gate if (!(vip->vi_flags & FLG_VER_AVAIL)) { 5747c478bd9Sstevel@tonic-gate sdp->sd_flags |= FLG_SY_NOTAVAIL; 5757c478bd9Sstevel@tonic-gate sap->sa_vfile = ifl->ifl_name; 5767c478bd9Sstevel@tonic-gate } 5777c478bd9Sstevel@tonic-gate } 5787c478bd9Sstevel@tonic-gate if (!(ifl->ifl_flags & FLG_IF_NEEDED)) 5797c478bd9Sstevel@tonic-gate sdp->sd_flags |= FLG_SY_NOTAVAIL; 5807c478bd9Sstevel@tonic-gate 5817c478bd9Sstevel@tonic-gate } else if (etype == ET_REL) { 5827c478bd9Sstevel@tonic-gate /* 5837c478bd9Sstevel@tonic-gate * If this symbol has been obtained from a versioned 5847c478bd9Sstevel@tonic-gate * input relocatable object then the new symbol must be 5857c478bd9Sstevel@tonic-gate * promoted to the versioning of the output file. 5867c478bd9Sstevel@tonic-gate */ 5877c478bd9Sstevel@tonic-gate if (ifl->ifl_versym) 5885aefb655Srie ld_vers_promote(sdp, ndx, ifl, ofl); 5897c478bd9Sstevel@tonic-gate } 5907c478bd9Sstevel@tonic-gate 5917c478bd9Sstevel@tonic-gate if ((ofl->ofl_flags & FLG_OF_GENMAP) && 5927c478bd9Sstevel@tonic-gate ((sdflags & FLG_SY_SPECSEC) == 0)) 59357ef7aa9SRod Evans if (aplist_append(&sap->sa_dfiles, ifl->ifl_name, 59457ef7aa9SRod Evans AL_CNT_SDP_DFILES) == NULL) 5957c478bd9Sstevel@tonic-gate return ((Sym_desc *)S_ERROR); 5967c478bd9Sstevel@tonic-gate } 5977c478bd9Sstevel@tonic-gate 59860758829Srie /* 59960758829Srie * Provided we're not processing a mapfile, diagnose the entered symbol. 60060758829Srie * Mapfile processing requires the symbol to be updated with additional 60160758829Srie * information, therefore the diagnosing of the symbol is deferred until 60260758829Srie * later (see Dbg_map_symbol()). 60360758829Srie */ 6046b3ba5bdSAli Bahrami if ((ifl == NULL) || ((ifl->ifl_flags & FLG_IF_MAPFILE) == 0)) 60560758829Srie DBG_CALL(Dbg_syms_entered(ofl, nsym, sdp)); 606635216b6SRod Evans 6077c478bd9Sstevel@tonic-gate return (sdp); 6087c478bd9Sstevel@tonic-gate } 6097c478bd9Sstevel@tonic-gate 6107c478bd9Sstevel@tonic-gate /* 6117c478bd9Sstevel@tonic-gate * Add a special symbol to the symbol table. Takes special symbol name with 6127c478bd9Sstevel@tonic-gate * and without underscores. This routine is called, after all other symbol 6137c478bd9Sstevel@tonic-gate * resolution has completed, to generate a reserved absolute symbol (the 6147c478bd9Sstevel@tonic-gate * underscore version). Special symbols are updated with the appropriate 615dd94ecefSrie * values in update_osym(). If the user has already defined this symbol 6167c478bd9Sstevel@tonic-gate * issue a warning and leave the symbol as is. If the non-underscore symbol 6177c478bd9Sstevel@tonic-gate * is referenced then turn it into a weak alias of the underscored symbol. 6187c478bd9Sstevel@tonic-gate * 619635216b6SRod Evans * The bits in sdflags_u are OR'd into the flags field of the symbol for the 620635216b6SRod Evans * underscored symbol. 621d579eb63Sab * 6227c478bd9Sstevel@tonic-gate * If this is a global symbol, and it hasn't explicitly been defined as being 6237c478bd9Sstevel@tonic-gate * directly bound to, indicate that it can't be directly bound to. 6247c478bd9Sstevel@tonic-gate * Historically, most special symbols only have meaning to the object in which 625c1c6f601Srie * they exist, however, they've always been global. To ensure compatibility 626c1c6f601Srie * with any unexpected use presently in effect, ensure these symbols don't get 6277c478bd9Sstevel@tonic-gate * directly bound to. Note, that establishing this state here isn't sufficient 6287c478bd9Sstevel@tonic-gate * to create a syminfo table, only if a syminfo table is being created by some 629c1c6f601Srie * other symbol directives will the nodirect binding be recorded. This ensures 6307c478bd9Sstevel@tonic-gate * we don't create syminfo sections for all objects we create, as this might add 6317c478bd9Sstevel@tonic-gate * unnecessary bloat to users who haven't explicitly requested extra symbol 6327c478bd9Sstevel@tonic-gate * information. 6337c478bd9Sstevel@tonic-gate */ 6347c478bd9Sstevel@tonic-gate static uintptr_t 6357c478bd9Sstevel@tonic-gate sym_add_spec(const char *name, const char *uname, Word sdaux_id, 636635216b6SRod Evans sd_flag_t sdflags_u, sd_flag_t sdflags, Ofl_desc *ofl) 6377c478bd9Sstevel@tonic-gate { 6387c478bd9Sstevel@tonic-gate Sym_desc *sdp; 639*c524b4feSRichard Lowe Sym_desc *usdp; 6407c478bd9Sstevel@tonic-gate Sym *sym; 6417c478bd9Sstevel@tonic-gate Word hash; 6427c478bd9Sstevel@tonic-gate avl_index_t where; 6437c478bd9Sstevel@tonic-gate 6447c478bd9Sstevel@tonic-gate /* LINTED */ 6457c478bd9Sstevel@tonic-gate hash = (Word)elf_hash(uname); 6465aefb655Srie if (usdp = ld_sym_find(uname, hash, &where, ofl)) { 6477c478bd9Sstevel@tonic-gate /* 6487c478bd9Sstevel@tonic-gate * If the underscore symbol exists and is undefined, or was 6497c478bd9Sstevel@tonic-gate * defined in a shared library, convert it to a local symbol. 6507c478bd9Sstevel@tonic-gate * Otherwise leave it as is and warn the user. 6517c478bd9Sstevel@tonic-gate */ 6527c478bd9Sstevel@tonic-gate if ((usdp->sd_shndx == SHN_UNDEF) || 6537c478bd9Sstevel@tonic-gate (usdp->sd_ref != REF_REL_NEED)) { 6547c478bd9Sstevel@tonic-gate usdp->sd_ref = REF_REL_NEED; 6557c478bd9Sstevel@tonic-gate usdp->sd_shndx = usdp->sd_sym->st_shndx = SHN_ABS; 656635216b6SRod Evans usdp->sd_flags |= FLG_SY_SPECSEC | sdflags_u; 6577c478bd9Sstevel@tonic-gate usdp->sd_sym->st_info = 6587c478bd9Sstevel@tonic-gate ELF_ST_INFO(STB_GLOBAL, STT_OBJECT); 6597c478bd9Sstevel@tonic-gate usdp->sd_isc = NULL; 6607c478bd9Sstevel@tonic-gate usdp->sd_sym->st_size = 0; 6617c478bd9Sstevel@tonic-gate usdp->sd_sym->st_value = 0; 6627c478bd9Sstevel@tonic-gate /* LINTED */ 6637c478bd9Sstevel@tonic-gate usdp->sd_aux->sa_symspec = (Half)sdaux_id; 6647c478bd9Sstevel@tonic-gate 6657c478bd9Sstevel@tonic-gate /* 6669a411307Srie * If a user hasn't specifically indicated that the 6679a411307Srie * scope of this symbol be made local, then leave it 6689a411307Srie * as global (ie. prevent automatic scoping). The GOT 6699a411307Srie * should be defined protected, whereas all other 6709a411307Srie * special symbols are tagged as no-direct. 6717c478bd9Sstevel@tonic-gate */ 67208278a5eSRod Evans if (!SYM_IS_HIDDEN(usdp) && 673635216b6SRod Evans (sdflags & FLG_SY_DEFAULT)) { 67433eb6ee1Sab usdp->sd_aux->sa_overndx = VER_NDX_GLOBAL; 67533eb6ee1Sab if (sdaux_id == SDAUX_ID_GOT) { 676635216b6SRod Evans usdp->sd_flags &= ~FLG_SY_NDIR; 677635216b6SRod Evans usdp->sd_flags |= FLG_SY_PROTECT; 67833eb6ee1Sab usdp->sd_sym->st_other = STV_PROTECTED; 67933eb6ee1Sab } else if ( 680635216b6SRod Evans ((usdp->sd_flags & FLG_SY_DIR) == 0) && 68133eb6ee1Sab ((ofl->ofl_flags & FLG_OF_SYMBOLIC) == 0)) { 682635216b6SRod Evans usdp->sd_flags |= FLG_SY_NDIR; 68333eb6ee1Sab } 6847c478bd9Sstevel@tonic-gate } 685635216b6SRod Evans usdp->sd_flags |= sdflags; 6867c478bd9Sstevel@tonic-gate 6877c478bd9Sstevel@tonic-gate /* 688c1c6f601Srie * If the reference originated from a mapfile ensure 6897c478bd9Sstevel@tonic-gate * we mark the symbol as used. 6907c478bd9Sstevel@tonic-gate */ 6917c478bd9Sstevel@tonic-gate if (usdp->sd_flags & FLG_SY_MAPREF) 6927c478bd9Sstevel@tonic-gate usdp->sd_flags |= FLG_SY_MAPUSED; 6937c478bd9Sstevel@tonic-gate 6945aefb655Srie DBG_CALL(Dbg_syms_updated(ofl, usdp, uname)); 6957c478bd9Sstevel@tonic-gate } else 6961007fd6fSAli Bahrami ld_eprintf(ofl, ERR_WARNING, MSG_INTL(MSG_SYM_RESERVE), 6971007fd6fSAli Bahrami uname, usdp->sd_file->ifl_name); 6987c478bd9Sstevel@tonic-gate } else { 6997c478bd9Sstevel@tonic-gate /* 7007c478bd9Sstevel@tonic-gate * If the symbol does not exist create it. 7017c478bd9Sstevel@tonic-gate */ 7026b3ba5bdSAli Bahrami if ((sym = libld_calloc(sizeof (Sym), 1)) == NULL) 7037c478bd9Sstevel@tonic-gate return (S_ERROR); 7047c478bd9Sstevel@tonic-gate sym->st_shndx = SHN_ABS; 7057c478bd9Sstevel@tonic-gate sym->st_info = ELF_ST_INFO(STB_GLOBAL, STT_OBJECT); 7067c478bd9Sstevel@tonic-gate sym->st_size = 0; 7077c478bd9Sstevel@tonic-gate sym->st_value = 0; 7085aefb655Srie DBG_CALL(Dbg_syms_created(ofl->ofl_lml, uname)); 7095aefb655Srie if ((usdp = ld_sym_enter(uname, sym, hash, (Ifl_desc *)NULL, 710635216b6SRod Evans ofl, 0, SHN_ABS, (FLG_SY_SPECSEC | sdflags_u), &where)) == 7117c478bd9Sstevel@tonic-gate (Sym_desc *)S_ERROR) 7127c478bd9Sstevel@tonic-gate return (S_ERROR); 7137c478bd9Sstevel@tonic-gate usdp->sd_ref = REF_REL_NEED; 7147c478bd9Sstevel@tonic-gate /* LINTED */ 7157c478bd9Sstevel@tonic-gate usdp->sd_aux->sa_symspec = (Half)sdaux_id; 7167c478bd9Sstevel@tonic-gate 7177c478bd9Sstevel@tonic-gate usdp->sd_aux->sa_overndx = VER_NDX_GLOBAL; 7189a411307Srie 7199a411307Srie if (sdaux_id == SDAUX_ID_GOT) { 720635216b6SRod Evans usdp->sd_flags |= FLG_SY_PROTECT; 7219a411307Srie usdp->sd_sym->st_other = STV_PROTECTED; 722635216b6SRod Evans } else if ((sdflags & FLG_SY_DEFAULT) && 7239a411307Srie ((ofl->ofl_flags & FLG_OF_SYMBOLIC) == 0)) { 724635216b6SRod Evans usdp->sd_flags |= FLG_SY_NDIR; 7259a411307Srie } 726635216b6SRod Evans usdp->sd_flags |= sdflags; 7277c478bd9Sstevel@tonic-gate } 7287c478bd9Sstevel@tonic-gate 72928bda19cSRod Evans if (name && (sdp = ld_sym_find(name, SYM_NOHASH, NULL, ofl)) && 7300bc07c75Srie (sdp->sd_sym->st_shndx == SHN_UNDEF)) { 7317c478bd9Sstevel@tonic-gate uchar_t bind; 7327c478bd9Sstevel@tonic-gate 7337c478bd9Sstevel@tonic-gate /* 7347c478bd9Sstevel@tonic-gate * If the non-underscore symbol exists and is undefined 7357c478bd9Sstevel@tonic-gate * convert it to be a local. If the underscore has 7367c478bd9Sstevel@tonic-gate * sa_symspec set (ie. it was created above) then simulate this 7377c478bd9Sstevel@tonic-gate * as a weak alias. 7387c478bd9Sstevel@tonic-gate */ 7397c478bd9Sstevel@tonic-gate sdp->sd_ref = REF_REL_NEED; 7407c478bd9Sstevel@tonic-gate sdp->sd_shndx = sdp->sd_sym->st_shndx = SHN_ABS; 7417c478bd9Sstevel@tonic-gate sdp->sd_flags |= FLG_SY_SPECSEC; 7427c478bd9Sstevel@tonic-gate sdp->sd_isc = NULL; 7437c478bd9Sstevel@tonic-gate sdp->sd_sym->st_size = 0; 7447c478bd9Sstevel@tonic-gate sdp->sd_sym->st_value = 0; 7457c478bd9Sstevel@tonic-gate /* LINTED */ 7467c478bd9Sstevel@tonic-gate sdp->sd_aux->sa_symspec = (Half)sdaux_id; 7477c478bd9Sstevel@tonic-gate if (usdp->sd_aux->sa_symspec) { 7487c478bd9Sstevel@tonic-gate usdp->sd_aux->sa_linkndx = 0; 7497c478bd9Sstevel@tonic-gate sdp->sd_aux->sa_linkndx = 0; 7507c478bd9Sstevel@tonic-gate bind = STB_WEAK; 7517c478bd9Sstevel@tonic-gate } else 7527c478bd9Sstevel@tonic-gate bind = STB_GLOBAL; 7537c478bd9Sstevel@tonic-gate sdp->sd_sym->st_info = ELF_ST_INFO(bind, STT_OBJECT); 7547c478bd9Sstevel@tonic-gate 7557c478bd9Sstevel@tonic-gate /* 7569a411307Srie * If a user hasn't specifically indicated the scope of this 7579a411307Srie * symbol be made local then leave it as global (ie. prevent 7589a411307Srie * automatic scoping). The GOT should be defined protected, 7599a411307Srie * whereas all other special symbols are tagged as no-direct. 7607c478bd9Sstevel@tonic-gate */ 76108278a5eSRod Evans if (!SYM_IS_HIDDEN(sdp) && 762635216b6SRod Evans (sdflags & FLG_SY_DEFAULT)) { 7637c478bd9Sstevel@tonic-gate sdp->sd_aux->sa_overndx = VER_NDX_GLOBAL; 7649a411307Srie if (sdaux_id == SDAUX_ID_GOT) { 765635216b6SRod Evans sdp->sd_flags &= ~FLG_SY_NDIR; 766635216b6SRod Evans sdp->sd_flags |= FLG_SY_PROTECT; 7679a411307Srie sdp->sd_sym->st_other = STV_PROTECTED; 768635216b6SRod Evans } else if (((sdp->sd_flags & FLG_SY_DIR) == 0) && 7699a411307Srie ((ofl->ofl_flags & FLG_OF_SYMBOLIC) == 0)) { 770635216b6SRod Evans sdp->sd_flags |= FLG_SY_NDIR; 7719a411307Srie } 7727c478bd9Sstevel@tonic-gate } 773635216b6SRod Evans sdp->sd_flags |= sdflags; 7747c478bd9Sstevel@tonic-gate 7757c478bd9Sstevel@tonic-gate /* 776c1c6f601Srie * If the reference originated from a mapfile ensure 7777c478bd9Sstevel@tonic-gate * we mark the symbol as used. 7787c478bd9Sstevel@tonic-gate */ 7797c478bd9Sstevel@tonic-gate if (sdp->sd_flags & FLG_SY_MAPREF) 7807c478bd9Sstevel@tonic-gate sdp->sd_flags |= FLG_SY_MAPUSED; 7817c478bd9Sstevel@tonic-gate 7825aefb655Srie DBG_CALL(Dbg_syms_updated(ofl, sdp, name)); 7837c478bd9Sstevel@tonic-gate } 7847c478bd9Sstevel@tonic-gate return (1); 7857c478bd9Sstevel@tonic-gate } 7867c478bd9Sstevel@tonic-gate 7877c478bd9Sstevel@tonic-gate 7887c478bd9Sstevel@tonic-gate /* 7897c478bd9Sstevel@tonic-gate * Undefined symbols can fall into one of four types: 7907c478bd9Sstevel@tonic-gate * 7916b3ba5bdSAli Bahrami * - the symbol is really undefined (SHN_UNDEF). 7927c478bd9Sstevel@tonic-gate * 7936b3ba5bdSAli Bahrami * - versioning has been enabled, however this symbol has not been assigned 7947c478bd9Sstevel@tonic-gate * to one of the defined versions. 7957c478bd9Sstevel@tonic-gate * 7966b3ba5bdSAli Bahrami * - the symbol has been defined by an implicitly supplied library, ie. one 7977c478bd9Sstevel@tonic-gate * which was encounted because it was NEEDED by another library, rather 798*c524b4feSRichard Lowe * than from a command line supplied library which would become the only 7997c478bd9Sstevel@tonic-gate * dependency of the output file being produced. 8007c478bd9Sstevel@tonic-gate * 8016b3ba5bdSAli Bahrami * - the symbol has been defined by a version of a shared object that is 8027c478bd9Sstevel@tonic-gate * not permitted for this link-edit. 8037c478bd9Sstevel@tonic-gate * 8047c478bd9Sstevel@tonic-gate * In all cases the file who made the first reference to this symbol will have 8057c478bd9Sstevel@tonic-gate * been recorded via the `sa_rfile' pointer. 8067c478bd9Sstevel@tonic-gate */ 8077c478bd9Sstevel@tonic-gate typedef enum { 8087c478bd9Sstevel@tonic-gate UNDEF, NOVERSION, IMPLICIT, NOTAVAIL, 8097c478bd9Sstevel@tonic-gate BNDLOCAL 8107c478bd9Sstevel@tonic-gate } Type; 8117c478bd9Sstevel@tonic-gate 8127c478bd9Sstevel@tonic-gate static const Msg format[] = { 8137c478bd9Sstevel@tonic-gate MSG_SYM_UND_UNDEF, /* MSG_INTL(MSG_SYM_UND_UNDEF) */ 8147c478bd9Sstevel@tonic-gate MSG_SYM_UND_NOVER, /* MSG_INTL(MSG_SYM_UND_NOVER) */ 8157c478bd9Sstevel@tonic-gate MSG_SYM_UND_IMPL, /* MSG_INTL(MSG_SYM_UND_IMPL) */ 8167c478bd9Sstevel@tonic-gate MSG_SYM_UND_NOTA, /* MSG_INTL(MSG_SYM_UND_NOTA) */ 8177c478bd9Sstevel@tonic-gate MSG_SYM_UND_BNDLOCAL /* MSG_INTL(MSG_SYM_UND_BNDLOCAL) */ 8187c478bd9Sstevel@tonic-gate }; 8197c478bd9Sstevel@tonic-gate 8201007fd6fSAli Bahrami /* 8211007fd6fSAli Bahrami * Issue an undefined symbol message for the given symbol. 8221007fd6fSAli Bahrami * 8231007fd6fSAli Bahrami * entry: 8241007fd6fSAli Bahrami * ofl - Output descriptor 8251007fd6fSAli Bahrami * sdp - Undefined symbol to report 8261007fd6fSAli Bahrami * type - Type of undefined symbol 8271007fd6fSAli Bahrami * ofl_flag - One of 0, FLG_OF_FATAL, or FLG_OF_WARN. 8281007fd6fSAli Bahrami * undef_state - Address of variable to be initialized to 0 8291007fd6fSAli Bahrami * before the first call to sym_undef_entry, and passed 8301007fd6fSAli Bahrami * to each subsequent call. A non-zero value for *undef_state 8311007fd6fSAli Bahrami * indicates that this is not the first call in the series. 8321007fd6fSAli Bahrami * 8331007fd6fSAli Bahrami * exit: 8341007fd6fSAli Bahrami * If *undef_state is 0, a title is issued. 8351007fd6fSAli Bahrami * 8361007fd6fSAli Bahrami * A message for the undefined symbol is issued. 8371007fd6fSAli Bahrami * 8381007fd6fSAli Bahrami * If ofl_flag is non-zero, its value is OR'd into *undef_state. Otherwise, 8391007fd6fSAli Bahrami * all bits other than FLG_OF_FATAL and FLG_OF_WARN are set, in order to 8401007fd6fSAli Bahrami * provide *undef_state with a non-zero value. These other bits have 8411007fd6fSAli Bahrami * no meaning beyond that, and serve to ensure that *undef_state is 8421007fd6fSAli Bahrami * non-zero if sym_undef_entry() has been called. 8431007fd6fSAli Bahrami */ 8445aefb655Srie static void 8451007fd6fSAli Bahrami sym_undef_entry(Ofl_desc *ofl, Sym_desc *sdp, Type type, ofl_flag_t ofl_flag, 8461007fd6fSAli Bahrami ofl_flag_t *undef_state) 8477c478bd9Sstevel@tonic-gate { 8487c478bd9Sstevel@tonic-gate const char *name1, *name2, *name3; 8497c478bd9Sstevel@tonic-gate Ifl_desc *ifl = sdp->sd_file; 8507c478bd9Sstevel@tonic-gate Sym_aux *sap = sdp->sd_aux; 8517c478bd9Sstevel@tonic-gate 8521007fd6fSAli Bahrami if (*undef_state == 0) 8531007fd6fSAli Bahrami ld_eprintf(ofl, ERR_NONE, MSG_INTL(MSG_SYM_FMT_UNDEF), 8541007fd6fSAli Bahrami MSG_INTL(MSG_SYM_UNDEF_ITM_11), 8551007fd6fSAli Bahrami MSG_INTL(MSG_SYM_UNDEF_ITM_21), 8561007fd6fSAli Bahrami MSG_INTL(MSG_SYM_UNDEF_ITM_12), 8571007fd6fSAli Bahrami MSG_INTL(MSG_SYM_UNDEF_ITM_22)); 8581007fd6fSAli Bahrami 8591007fd6fSAli Bahrami ofl->ofl_flags |= ofl_flag; 8601007fd6fSAli Bahrami *undef_state |= ofl_flag ? ofl_flag : ~(FLG_OF_FATAL | FLG_OF_WARN); 8617c478bd9Sstevel@tonic-gate 8627c478bd9Sstevel@tonic-gate switch (type) { 8637c478bd9Sstevel@tonic-gate case UNDEF: 8647c478bd9Sstevel@tonic-gate case BNDLOCAL: 8657c478bd9Sstevel@tonic-gate name1 = sap->sa_rfile; 8667c478bd9Sstevel@tonic-gate break; 8677c478bd9Sstevel@tonic-gate case NOVERSION: 8687c478bd9Sstevel@tonic-gate name1 = ifl->ifl_name; 8697c478bd9Sstevel@tonic-gate break; 8707c478bd9Sstevel@tonic-gate case IMPLICIT: 8717c478bd9Sstevel@tonic-gate name1 = sap->sa_rfile; 8727c478bd9Sstevel@tonic-gate name2 = ifl->ifl_name; 8737c478bd9Sstevel@tonic-gate break; 8747c478bd9Sstevel@tonic-gate case NOTAVAIL: 8757c478bd9Sstevel@tonic-gate name1 = sap->sa_rfile; 8767c478bd9Sstevel@tonic-gate name2 = sap->sa_vfile; 8777c478bd9Sstevel@tonic-gate name3 = ifl->ifl_verndx[sap->sa_dverndx].vi_name; 8787c478bd9Sstevel@tonic-gate break; 8797c478bd9Sstevel@tonic-gate default: 8807c478bd9Sstevel@tonic-gate return; 8817c478bd9Sstevel@tonic-gate } 8827c478bd9Sstevel@tonic-gate 8831007fd6fSAli Bahrami ld_eprintf(ofl, ERR_NONE, MSG_INTL(format[type]), 8845aefb655Srie demangle(sdp->sd_name), name1, name2, name3); 8857c478bd9Sstevel@tonic-gate } 8867c478bd9Sstevel@tonic-gate 8877c478bd9Sstevel@tonic-gate /* 8887c478bd9Sstevel@tonic-gate * At this point all symbol input processing has been completed, therefore 8897c478bd9Sstevel@tonic-gate * complete the symbol table entries by generating any necessary internal 8907c478bd9Sstevel@tonic-gate * symbols. 8917c478bd9Sstevel@tonic-gate */ 8927c478bd9Sstevel@tonic-gate uintptr_t 8935aefb655Srie ld_sym_spec(Ofl_desc *ofl) 8947c478bd9Sstevel@tonic-gate { 8959a411307Srie Sym_desc *sdp; 8967c478bd9Sstevel@tonic-gate 8979a411307Srie if (ofl->ofl_flags & FLG_OF_RELOBJ) 8989a411307Srie return (1); 8997c478bd9Sstevel@tonic-gate 9009a411307Srie DBG_CALL(Dbg_syms_spec_title(ofl->ofl_lml)); 9019a411307Srie 9029a411307Srie if (sym_add_spec(MSG_ORIG(MSG_SYM_ETEXT), MSG_ORIG(MSG_SYM_ETEXT_U), 903635216b6SRod Evans SDAUX_ID_ETEXT, 0, (FLG_SY_DEFAULT | FLG_SY_EXPDEF), 90460758829Srie ofl) == S_ERROR) 9059a411307Srie return (S_ERROR); 9069a411307Srie if (sym_add_spec(MSG_ORIG(MSG_SYM_EDATA), MSG_ORIG(MSG_SYM_EDATA_U), 907635216b6SRod Evans SDAUX_ID_EDATA, 0, (FLG_SY_DEFAULT | FLG_SY_EXPDEF), 90860758829Srie ofl) == S_ERROR) 9099a411307Srie return (S_ERROR); 9109a411307Srie if (sym_add_spec(MSG_ORIG(MSG_SYM_END), MSG_ORIG(MSG_SYM_END_U), 911635216b6SRod Evans SDAUX_ID_END, FLG_SY_DYNSORT, (FLG_SY_DEFAULT | FLG_SY_EXPDEF), 91260758829Srie ofl) == S_ERROR) 9139a411307Srie return (S_ERROR); 9149a411307Srie if (sym_add_spec(MSG_ORIG(MSG_SYM_L_END), MSG_ORIG(MSG_SYM_L_END_U), 915635216b6SRod Evans SDAUX_ID_END, 0, FLG_SY_HIDDEN, ofl) == S_ERROR) 9169a411307Srie return (S_ERROR); 9179a411307Srie if (sym_add_spec(MSG_ORIG(MSG_SYM_L_START), MSG_ORIG(MSG_SYM_L_START_U), 918635216b6SRod Evans SDAUX_ID_START, 0, FLG_SY_HIDDEN, ofl) == S_ERROR) 9199a411307Srie return (S_ERROR); 9207c478bd9Sstevel@tonic-gate 9219a411307Srie /* 9229a411307Srie * Historically we've always produced a _DYNAMIC symbol, even for 9239a411307Srie * static executables (in which case its value will be 0). 9249a411307Srie */ 9259a411307Srie if (sym_add_spec(MSG_ORIG(MSG_SYM_DYNAMIC), MSG_ORIG(MSG_SYM_DYNAMIC_U), 926635216b6SRod Evans SDAUX_ID_DYN, FLG_SY_DYNSORT, (FLG_SY_DEFAULT | FLG_SY_EXPDEF), 92760758829Srie ofl) == S_ERROR) 9289a411307Srie return (S_ERROR); 9299a411307Srie 930d579eb63Sab if (OFL_ALLOW_DYNSYM(ofl)) 9319a411307Srie if (sym_add_spec(MSG_ORIG(MSG_SYM_PLKTBL), 9329a411307Srie MSG_ORIG(MSG_SYM_PLKTBL_U), SDAUX_ID_PLT, 933635216b6SRod Evans FLG_SY_DYNSORT, (FLG_SY_DEFAULT | FLG_SY_EXPDEF), 93460758829Srie ofl) == S_ERROR) 9357c478bd9Sstevel@tonic-gate return (S_ERROR); 9367c478bd9Sstevel@tonic-gate 9379a411307Srie /* 9389a411307Srie * A GOT reference will be accompanied by the associated GOT symbol. 9399a411307Srie * Make sure it gets assigned the appropriate special attributes. 9409a411307Srie */ 9419a411307Srie if (((sdp = ld_sym_find(MSG_ORIG(MSG_SYM_GOFTBL_U), 942635216b6SRod Evans SYM_NOHASH, NULL, ofl)) != NULL) && (sdp->sd_ref != REF_DYN_SEEN)) { 9439a411307Srie if (sym_add_spec(MSG_ORIG(MSG_SYM_GOFTBL), 944d579eb63Sab MSG_ORIG(MSG_SYM_GOFTBL_U), SDAUX_ID_GOT, FLG_SY_DYNSORT, 945635216b6SRod Evans (FLG_SY_DEFAULT | FLG_SY_EXPDEF), ofl) == S_ERROR) 9469a411307Srie return (S_ERROR); 9477c478bd9Sstevel@tonic-gate } 9489a411307Srie 9497c478bd9Sstevel@tonic-gate return (1); 9507c478bd9Sstevel@tonic-gate } 9517c478bd9Sstevel@tonic-gate 95208278a5eSRod Evans /* 95308278a5eSRod Evans * Determine a potential capability symbol's visibility. 95408278a5eSRod Evans * 95508278a5eSRod Evans * The -z symbolcap option transforms an object capabilities relocatable object 95608278a5eSRod Evans * into a symbol capabilities relocatable object. Any global function symbols, 95708278a5eSRod Evans * or initialized global data symbols are candidates for transforming into local 95808278a5eSRod Evans * symbol capabilities definitions. However, if a user indicates that a symbol 95908278a5eSRod Evans * should be demoted to local using a mapfile, then there is no need to 96008278a5eSRod Evans * transform the associated global symbol. 96108278a5eSRod Evans * 96208278a5eSRod Evans * Normally, a symbol's visibility is determined after the symbol resolution 96308278a5eSRod Evans * process, after all symbol state has been gathered and resolved. However, 96408278a5eSRod Evans * for -z symbolcap, this determination is too late. When a global symbol is 96508278a5eSRod Evans * read from an input file we need to determine it's visibility so as to decide 96608278a5eSRod Evans * whether to create a local or not. 96708278a5eSRod Evans * 96808278a5eSRod Evans * If a user has explicitly defined this symbol as having local scope within a 96908278a5eSRod Evans * mapfile, then a symbol of the same name already exists. However, explicit 97008278a5eSRod Evans * local definitions are uncommon, as most mapfiles define the global symbol 97108278a5eSRod Evans * requirements together with an auto-reduction directive '*'. If this state 97208278a5eSRod Evans * has been defined, then we must make sure that the new symbol isn't a type 97308278a5eSRod Evans * that can not be demoted to local. 97408278a5eSRod Evans */ 97508278a5eSRod Evans static int 97608278a5eSRod Evans sym_cap_vis(const char *name, Word hash, Sym *sym, Ofl_desc *ofl) 97708278a5eSRod Evans { 97808278a5eSRod Evans Sym_desc *sdp; 97908278a5eSRod Evans uchar_t vis; 98008278a5eSRod Evans avl_index_t where; 98108278a5eSRod Evans sd_flag_t sdflags = 0; 98208278a5eSRod Evans 98308278a5eSRod Evans /* 98408278a5eSRod Evans * Determine the visibility of the new symbol. 98508278a5eSRod Evans */ 98608278a5eSRod Evans vis = ELF_ST_VISIBILITY(sym->st_other); 98708278a5eSRod Evans switch (vis) { 98808278a5eSRod Evans case STV_EXPORTED: 98908278a5eSRod Evans sdflags |= FLG_SY_EXPORT; 99008278a5eSRod Evans break; 99108278a5eSRod Evans case STV_SINGLETON: 99208278a5eSRod Evans sdflags |= FLG_SY_SINGLE; 99308278a5eSRod Evans break; 994*c524b4feSRichard Lowe case STV_HIDDEN: 995*c524b4feSRichard Lowe sdflags |= FLG_SY_HIDDEN; 996*c524b4feSRichard Lowe break; 99708278a5eSRod Evans } 99808278a5eSRod Evans 99908278a5eSRod Evans /* 100008278a5eSRod Evans * Determine whether a symbol definition already exists, and if so 100108278a5eSRod Evans * obtain the visibility. 100208278a5eSRod Evans */ 100308278a5eSRod Evans if ((sdp = ld_sym_find(name, hash, &where, ofl)) != NULL) 100408278a5eSRod Evans sdflags |= sdp->sd_flags; 100508278a5eSRod Evans 100608278a5eSRod Evans /* 100708278a5eSRod Evans * Determine whether the symbol flags indicate this symbol should be 100808278a5eSRod Evans * hidden. 100908278a5eSRod Evans */ 101008278a5eSRod Evans if ((ofl->ofl_flags & (FLG_OF_AUTOLCL | FLG_OF_AUTOELM)) && 101108278a5eSRod Evans ((sdflags & MSK_SY_NOAUTO) == 0)) 101208278a5eSRod Evans sdflags |= FLG_SY_HIDDEN; 101308278a5eSRod Evans 101408278a5eSRod Evans return ((sdflags & FLG_SY_HIDDEN) == 0); 101508278a5eSRod Evans } 101608278a5eSRod Evans 10177c478bd9Sstevel@tonic-gate /* 10187c478bd9Sstevel@tonic-gate * This routine checks to see if a symbols visibility needs to be reduced to 10197c478bd9Sstevel@tonic-gate * either SYMBOLIC or LOCAL. This routine can be called from either 10207c478bd9Sstevel@tonic-gate * reloc_init() or sym_validate(). 10217c478bd9Sstevel@tonic-gate */ 10227c478bd9Sstevel@tonic-gate void 10235aefb655Srie ld_sym_adjust_vis(Sym_desc *sdp, Ofl_desc *ofl) 10247c478bd9Sstevel@tonic-gate { 102544bac77bSrie ofl_flag_t oflags = ofl->ofl_flags; 102644bac77bSrie Sym *sym = sdp->sd_sym; 10277c478bd9Sstevel@tonic-gate 10280bc07c75Srie if ((sdp->sd_ref == REF_REL_NEED) && 10290bc07c75Srie (sdp->sd_sym->st_shndx != SHN_UNDEF)) { 10307c478bd9Sstevel@tonic-gate /* 103160758829Srie * If auto-reduction/elimination is enabled, reduce any 103208278a5eSRod Evans * non-versioned, and non-local capabilities global symbols. 103360758829Srie * A symbol is a candidate for auto-reduction/elimination if: 103460758829Srie * 103528bda19cSRod Evans * - the symbol wasn't explicitly defined within a mapfile 103660758829Srie * (in which case all the necessary state has been applied 103760758829Srie * to the symbol), or 103828bda19cSRod Evans * - the symbol isn't one of the family of reserved 103960758829Srie * special symbols (ie. _end, _etext, etc.), or 104028bda19cSRod Evans * - the symbol isn't a SINGLETON, or 104128bda19cSRod Evans * - the symbol wasn't explicitly defined within a version 104260758829Srie * definition associated with an input relocatable object. 104360758829Srie * 10447c478bd9Sstevel@tonic-gate * Indicate that the symbol has been reduced as it may be 10457c478bd9Sstevel@tonic-gate * necessary to print these symbols later. 10467c478bd9Sstevel@tonic-gate */ 104744bac77bSrie if ((oflags & (FLG_OF_AUTOLCL | FLG_OF_AUTOELM)) && 1048635216b6SRod Evans ((sdp->sd_flags & MSK_SY_NOAUTO) == 0)) { 1049635216b6SRod Evans if ((sdp->sd_flags & FLG_SY_HIDDEN) == 0) { 1050635216b6SRod Evans sdp->sd_flags |= 1051635216b6SRod Evans (FLG_SY_REDUCED | FLG_SY_HIDDEN); 105260758829Srie } 10537c478bd9Sstevel@tonic-gate 105444bac77bSrie if (oflags & (FLG_OF_REDLSYM | FLG_OF_AUTOELM)) { 1055635216b6SRod Evans sdp->sd_flags |= FLG_SY_ELIM; 105660758829Srie sym->st_other = STV_ELIMINATE | 105760758829Srie (sym->st_other & ~MSK_SYM_VISIBILITY); 105860758829Srie } else if (ELF_ST_VISIBILITY(sym->st_other) != 105960758829Srie STV_INTERNAL) 106060758829Srie sym->st_other = STV_HIDDEN | 106160758829Srie (sym->st_other & ~MSK_SYM_VISIBILITY); 10627c478bd9Sstevel@tonic-gate } 10637c478bd9Sstevel@tonic-gate 10647c478bd9Sstevel@tonic-gate /* 10659a411307Srie * If -Bsymbolic is in effect, and the symbol hasn't explicitly 10669a411307Srie * been defined nodirect (via a mapfile), then bind the global 10679a411307Srie * symbol symbolically and assign the STV_PROTECTED visibility 10687c478bd9Sstevel@tonic-gate * attribute. 10697c478bd9Sstevel@tonic-gate */ 10707c478bd9Sstevel@tonic-gate if ((oflags & FLG_OF_SYMBOLIC) && 1071635216b6SRod Evans ((sdp->sd_flags & (FLG_SY_HIDDEN | FLG_SY_NDIR)) == 0)) { 1072635216b6SRod Evans sdp->sd_flags |= FLG_SY_PROTECT; 10737c478bd9Sstevel@tonic-gate if (ELF_ST_VISIBILITY(sym->st_other) == STV_DEFAULT) 10747c478bd9Sstevel@tonic-gate sym->st_other = STV_PROTECTED | 10757c478bd9Sstevel@tonic-gate (sym->st_other & ~MSK_SYM_VISIBILITY); 10767c478bd9Sstevel@tonic-gate } 10777c478bd9Sstevel@tonic-gate } 10787c478bd9Sstevel@tonic-gate 10797c478bd9Sstevel@tonic-gate /* 10807c478bd9Sstevel@tonic-gate * Indicate that this symbol has had it's visibility checked so that 10817c478bd9Sstevel@tonic-gate * we don't need to do this investigation again. 10827c478bd9Sstevel@tonic-gate */ 10837c478bd9Sstevel@tonic-gate sdp->sd_flags |= FLG_SY_VISIBLE; 10847c478bd9Sstevel@tonic-gate } 10857c478bd9Sstevel@tonic-gate 1086c1c6f601Srie /* 1087c1c6f601Srie * Make sure a symbol definition is local to the object being built. 1088c1c6f601Srie */ 108957ef7aa9SRod Evans inline static int 1090c1c6f601Srie ensure_sym_local(Ofl_desc *ofl, Sym_desc *sdp, const char *str) 1091c1c6f601Srie { 1092c1c6f601Srie if (sdp->sd_sym->st_shndx == SHN_UNDEF) { 1093c1c6f601Srie if (str) { 10941007fd6fSAli Bahrami ld_eprintf(ofl, ERR_FATAL, MSG_INTL(MSG_SYM_UNDEF), 10951007fd6fSAli Bahrami str, demangle((char *)sdp->sd_name)); 1096c1c6f601Srie } 1097c1c6f601Srie return (1); 1098c1c6f601Srie } 1099c1c6f601Srie if (sdp->sd_ref != REF_REL_NEED) { 1100c1c6f601Srie if (str) { 11011007fd6fSAli Bahrami ld_eprintf(ofl, ERR_FATAL, MSG_INTL(MSG_SYM_EXTERN), 11021007fd6fSAli Bahrami str, demangle((char *)sdp->sd_name), 1103c1c6f601Srie sdp->sd_file->ifl_name); 1104c1c6f601Srie } 1105c1c6f601Srie return (1); 1106c1c6f601Srie } 1107c1c6f601Srie 1108c1c6f601Srie sdp->sd_flags |= FLG_SY_UPREQD; 1109c1c6f601Srie if (sdp->sd_isc) { 1110c1c6f601Srie sdp->sd_isc->is_flags |= FLG_IS_SECTREF; 1111c1c6f601Srie sdp->sd_isc->is_file->ifl_flags |= FLG_IF_FILEREF; 1112c1c6f601Srie } 1113c1c6f601Srie return (0); 1114c1c6f601Srie } 1115c1c6f601Srie 1116c1c6f601Srie /* 1117c1c6f601Srie * Make sure all the symbol definitions required for initarray, finiarray, or 1118c1c6f601Srie * preinitarray's are local to the object being built. 1119c1c6f601Srie */ 1120c1c6f601Srie static int 112157ef7aa9SRod Evans ensure_array_local(Ofl_desc *ofl, APlist *apl, const char *str) 1122c1c6f601Srie { 112357ef7aa9SRod Evans Aliste idx; 1124c1c6f601Srie Sym_desc *sdp; 1125c1c6f601Srie int ret = 0; 1126c1c6f601Srie 112757ef7aa9SRod Evans for (APLIST_TRAVERSE(apl, idx, sdp)) 1128c1c6f601Srie ret += ensure_sym_local(ofl, sdp, str); 1129c1c6f601Srie 1130c1c6f601Srie return (ret); 1131c1c6f601Srie } 1132c1c6f601Srie 11337c478bd9Sstevel@tonic-gate /* 11347c478bd9Sstevel@tonic-gate * After all symbol table input processing has been finished, and all relocation 11357c478bd9Sstevel@tonic-gate * counting has been carried out (ie. no more symbols will be read, generated, 11367c478bd9Sstevel@tonic-gate * or modified), validate and count the relevant entries: 11377c478bd9Sstevel@tonic-gate * 113808278a5eSRod Evans * - check and print any undefined symbols remaining. Note that if a symbol 1139*c524b4feSRichard Lowe * has been defined by virtue of the inclusion of an implicit shared 114008278a5eSRod Evans * library, it is still classed as undefined. 11417c478bd9Sstevel@tonic-gate * 114208278a5eSRod Evans * - count the number of global needed symbols together with the size of 114308278a5eSRod Evans * their associated name strings (if scoping has been indicated these 114408278a5eSRod Evans * symbols may be reduced to locals). 11457c478bd9Sstevel@tonic-gate * 114608278a5eSRod Evans * - establish the size and alignment requirements for the global .bss 1147*c524b4feSRichard Lowe * section (the alignment of this section is based on the first symbol 114808278a5eSRod Evans * that it will contain). 11497c478bd9Sstevel@tonic-gate */ 11507c478bd9Sstevel@tonic-gate uintptr_t 11515aefb655Srie ld_sym_validate(Ofl_desc *ofl) 11527c478bd9Sstevel@tonic-gate { 11537c478bd9Sstevel@tonic-gate Sym_avlnode *sav; 11547c478bd9Sstevel@tonic-gate Sym_desc *sdp; 11557c478bd9Sstevel@tonic-gate Sym *sym; 11561d9df23bSab ofl_flag_t oflags = ofl->ofl_flags; 11571d9df23bSab ofl_flag_t undef = 0, needed = 0, verdesc = 0; 11587c478bd9Sstevel@tonic-gate Xword bssalign = 0, tlsalign = 0; 1159e64d0ff9SAli Bahrami Boolean need_bss, need_tlsbss; 11607c478bd9Sstevel@tonic-gate Xword bsssize = 0, tlssize = 0; 1161ba2be530Sab #if defined(_ELF64) 116254d82594Sseizo Xword lbssalign = 0, lbsssize = 0; 1163e64d0ff9SAli Bahrami Boolean need_lbss; 116454d82594Sseizo #endif 116508278a5eSRod Evans int ret, allow_ldynsym; 1166d579eb63Sab uchar_t type; 11671007fd6fSAli Bahrami ofl_flag_t undef_state = 0; 11687c478bd9Sstevel@tonic-gate 11692017c965SRod Evans DBG_CALL(Dbg_basic_validate(ofl->ofl_lml)); 11702017c965SRod Evans 1171e64d0ff9SAli Bahrami /* 1172e64d0ff9SAli Bahrami * The need_XXX booleans are used to determine whether we need to 1173e64d0ff9SAli Bahrami * create each type of bss section. We used to create these sections 1174e64d0ff9SAli Bahrami * if the sum of the required sizes for each type were non-zero. 1175e64d0ff9SAli Bahrami * However, it is possible for a compiler to generate COMMON variables 1176e64d0ff9SAli Bahrami * of zero-length and this tricks that logic --- even zero-length 1177e64d0ff9SAli Bahrami * symbols need an output section. 1178e64d0ff9SAli Bahrami */ 1179e64d0ff9SAli Bahrami need_bss = need_tlsbss = FALSE; 1180e64d0ff9SAli Bahrami #if defined(_ELF64) 1181e64d0ff9SAli Bahrami need_lbss = FALSE; 1182e64d0ff9SAli Bahrami #endif 1183e64d0ff9SAli Bahrami 11847c478bd9Sstevel@tonic-gate /* 11851007fd6fSAli Bahrami * Determine how undefined symbols are handled: 11861007fd6fSAli Bahrami * 11871007fd6fSAli Bahrami * fatal: 11881007fd6fSAli Bahrami * If this link-edit calls for no undefined symbols to remain 11891007fd6fSAli Bahrami * (this is the default case when generating an executable but 11901007fd6fSAli Bahrami * can be enforced for any object using -z defs), a fatal error 11911007fd6fSAli Bahrami * condition will be indicated. 11921007fd6fSAli Bahrami * 11931007fd6fSAli Bahrami * warning: 11941007fd6fSAli Bahrami * If we're creating a shared object, and either the -Bsymbolic 11951007fd6fSAli Bahrami * flag is set, or the user has turned on the -z guidance feature, 11961007fd6fSAli Bahrami * then a non-fatal warning is issued for each symbol. 11977c478bd9Sstevel@tonic-gate * 11981007fd6fSAli Bahrami * ignore: 11991007fd6fSAli Bahrami * In all other cases, undefined symbols are quietly allowed. 12007c478bd9Sstevel@tonic-gate */ 12011007fd6fSAli Bahrami if (oflags & FLG_OF_NOUNDEF) { 12027c478bd9Sstevel@tonic-gate undef = FLG_OF_FATAL; 12031007fd6fSAli Bahrami } else if (oflags & FLG_OF_SHAROBJ) { 12041007fd6fSAli Bahrami if ((oflags & FLG_OF_SYMBOLIC) || 12051007fd6fSAli Bahrami OFL_GUIDANCE(ofl, FLG_OFG_NO_DEFS)) 12061007fd6fSAli Bahrami undef = FLG_OF_WARN; 12071007fd6fSAli Bahrami } 12087c478bd9Sstevel@tonic-gate 12097c478bd9Sstevel@tonic-gate /* 12107c478bd9Sstevel@tonic-gate * If the symbol is referenced from an implicitly included shared object 12117c478bd9Sstevel@tonic-gate * (ie. it's not on the NEEDED list) then the symbol is also classified 12127c478bd9Sstevel@tonic-gate * as undefined and a fatal error condition will be indicated. 12137c478bd9Sstevel@tonic-gate */ 12147c478bd9Sstevel@tonic-gate if ((oflags & FLG_OF_NOUNDEF) || !(oflags & FLG_OF_SHAROBJ)) 12157c478bd9Sstevel@tonic-gate needed = FLG_OF_FATAL; 12161007fd6fSAli Bahrami else if ((oflags & FLG_OF_SHAROBJ) && 12171007fd6fSAli Bahrami OFL_GUIDANCE(ofl, FLG_OFG_NO_DEFS)) 12181007fd6fSAli Bahrami needed = FLG_OF_WARN; 12197c478bd9Sstevel@tonic-gate 12207c478bd9Sstevel@tonic-gate /* 122128bda19cSRod Evans * If the output image is being versioned, then all symbol definitions 122228bda19cSRod Evans * must be associated with a version. Any symbol that isn't associated 122328bda19cSRod Evans * with a version is classified as undefined, and a fatal error 122428bda19cSRod Evans * condition is indicated. 12257c478bd9Sstevel@tonic-gate */ 12267c478bd9Sstevel@tonic-gate if ((oflags & FLG_OF_VERDEF) && (ofl->ofl_vercnt > VER_NDX_GLOBAL)) 12277c478bd9Sstevel@tonic-gate verdesc = FLG_OF_FATAL; 12287c478bd9Sstevel@tonic-gate 12299039eeafSab allow_ldynsym = OFL_ALLOW_LDYNSYM(ofl); 1230d579eb63Sab 1231d579eb63Sab if (allow_ldynsym) { 1232d579eb63Sab /* 1233d579eb63Sab * Normally, we disallow symbols with 0 size from appearing 1234d579eb63Sab * in a dyn[sym|tls]sort section. However, there are some 1235d579eb63Sab * symbols that serve special purposes that we want to exempt 1236d579eb63Sab * from this rule. Look them up, and set their 1237d579eb63Sab * FLG_SY_DYNSORT flag. 1238d579eb63Sab */ 1239d579eb63Sab static const char *special[] = { 1240d579eb63Sab MSG_ORIG(MSG_SYM_INIT_U), /* _init */ 1241d579eb63Sab MSG_ORIG(MSG_SYM_FINI_U), /* _fini */ 1242d579eb63Sab MSG_ORIG(MSG_SYM_START), /* _start */ 1243d579eb63Sab NULL 1244d579eb63Sab }; 1245d579eb63Sab int i; 1246d579eb63Sab 1247d579eb63Sab for (i = 0; special[i] != NULL; i++) { 1248d579eb63Sab if (((sdp = ld_sym_find(special[i], 124928bda19cSRod Evans SYM_NOHASH, NULL, ofl)) != NULL) && 1250d579eb63Sab (sdp->sd_sym->st_size == 0)) { 1251d579eb63Sab if (ld_sym_copy(sdp) == S_ERROR) 1252d579eb63Sab return (S_ERROR); 1253d579eb63Sab sdp->sd_flags |= FLG_SY_DYNSORT; 1254d579eb63Sab } 1255d579eb63Sab } 1256d579eb63Sab } 1257d579eb63Sab 12587c478bd9Sstevel@tonic-gate /* 12597c478bd9Sstevel@tonic-gate * Collect and validate the globals from the internal symbol table. 12607c478bd9Sstevel@tonic-gate */ 12617c478bd9Sstevel@tonic-gate for (sav = avl_first(&ofl->ofl_symavl); sav; 12627c478bd9Sstevel@tonic-gate sav = AVL_NEXT(&ofl->ofl_symavl, sav)) { 126360758829Srie Is_desc *isp; 12640bc07c75Srie int undeferr = 0; 126560758829Srie uchar_t vis; 12667c478bd9Sstevel@tonic-gate 1267635216b6SRod Evans sdp = sav->sav_sdp; 12687c478bd9Sstevel@tonic-gate 12697c478bd9Sstevel@tonic-gate /* 12701007fd6fSAli Bahrami * If undefined symbols are allowed, and we're not being 12711007fd6fSAli Bahrami * asked to supply guidance, ignore any symbols that are 12727c478bd9Sstevel@tonic-gate * not needed. 12737c478bd9Sstevel@tonic-gate */ 12747c478bd9Sstevel@tonic-gate if (!(oflags & FLG_OF_NOUNDEF) && 12751007fd6fSAli Bahrami !OFL_GUIDANCE(ofl, FLG_OFG_NO_DEFS) && 12767c478bd9Sstevel@tonic-gate (sdp->sd_ref == REF_DYN_SEEN)) 12777c478bd9Sstevel@tonic-gate continue; 12787c478bd9Sstevel@tonic-gate 12797c478bd9Sstevel@tonic-gate /* 12807c478bd9Sstevel@tonic-gate * If the symbol originates from an external or parent mapfile 12817c478bd9Sstevel@tonic-gate * reference and hasn't been matched to a reference from a 12827c478bd9Sstevel@tonic-gate * relocatable object, ignore it. 12837c478bd9Sstevel@tonic-gate */ 12847c478bd9Sstevel@tonic-gate if ((sdp->sd_flags & (FLG_SY_EXTERN | FLG_SY_PARENT)) && 12857c478bd9Sstevel@tonic-gate ((sdp->sd_flags & FLG_SY_MAPUSED) == 0)) { 12867c478bd9Sstevel@tonic-gate sdp->sd_flags |= FLG_SY_INVALID; 12877c478bd9Sstevel@tonic-gate continue; 12887c478bd9Sstevel@tonic-gate } 12897c478bd9Sstevel@tonic-gate 12907c478bd9Sstevel@tonic-gate sym = sdp->sd_sym; 1291d579eb63Sab type = ELF_ST_TYPE(sym->st_info); 12927c478bd9Sstevel@tonic-gate 12937c478bd9Sstevel@tonic-gate /* 12947c478bd9Sstevel@tonic-gate * Sanity check TLS. 12957c478bd9Sstevel@tonic-gate */ 1296d579eb63Sab if ((type == STT_TLS) && (sym->st_size != 0) && 1297d579eb63Sab (sym->st_shndx != SHN_UNDEF) && 12980bc07c75Srie (sym->st_shndx != SHN_COMMON)) { 129960758829Srie Is_desc *isp = sdp->sd_isc; 130060758829Srie Ifl_desc *ifl = sdp->sd_file; 13017c478bd9Sstevel@tonic-gate 13026b3ba5bdSAli Bahrami if ((isp == NULL) || (isp->is_shdr == NULL) || 13037c478bd9Sstevel@tonic-gate ((isp->is_shdr->sh_flags & SHF_TLS) == 0)) { 13041007fd6fSAli Bahrami ld_eprintf(ofl, ERR_FATAL, 13055aefb655Srie MSG_INTL(MSG_SYM_TLS), 13067c478bd9Sstevel@tonic-gate demangle(sdp->sd_name), ifl->ifl_name); 13077c478bd9Sstevel@tonic-gate continue; 13087c478bd9Sstevel@tonic-gate } 13097c478bd9Sstevel@tonic-gate } 13107c478bd9Sstevel@tonic-gate 13117c478bd9Sstevel@tonic-gate if ((sdp->sd_flags & FLG_SY_VISIBLE) == 0) 13125aefb655Srie ld_sym_adjust_vis(sdp, ofl); 13137c478bd9Sstevel@tonic-gate 13147c478bd9Sstevel@tonic-gate if ((sdp->sd_flags & FLG_SY_REDUCED) && 13157c478bd9Sstevel@tonic-gate (oflags & FLG_OF_PROCRED)) { 13165aefb655Srie DBG_CALL(Dbg_syms_reduce(ofl, DBG_SYM_REDUCE_GLOBAL, 13175aefb655Srie sdp, 0, 0)); 13187c478bd9Sstevel@tonic-gate } 13197c478bd9Sstevel@tonic-gate 132060758829Srie /* 132160758829Srie * Record any STV_SINGLETON existence. 132260758829Srie */ 132360758829Srie if ((vis = ELF_ST_VISIBILITY(sym->st_other)) == STV_SINGLETON) 132460758829Srie ofl->ofl_dtflags_1 |= DF_1_SINGLETON; 132560758829Srie 13267c478bd9Sstevel@tonic-gate /* 13277c478bd9Sstevel@tonic-gate * If building a shared object or executable, and this is a 13287c478bd9Sstevel@tonic-gate * non-weak UNDEF symbol with reduced visibility (STV_*), then 13297c478bd9Sstevel@tonic-gate * give a fatal error. 13307c478bd9Sstevel@tonic-gate */ 133160758829Srie if (((oflags & FLG_OF_RELOBJ) == 0) && 13320bc07c75Srie (sym->st_shndx == SHN_UNDEF) && 13337c478bd9Sstevel@tonic-gate (ELF_ST_BIND(sym->st_info) != STB_WEAK)) { 133460758829Srie if (vis && (vis != STV_SINGLETON)) { 13351007fd6fSAli Bahrami sym_undef_entry(ofl, sdp, BNDLOCAL, 13361007fd6fSAli Bahrami FLG_OF_FATAL, &undef_state); 133760758829Srie continue; 133860758829Srie } 13397c478bd9Sstevel@tonic-gate } 13407c478bd9Sstevel@tonic-gate 13417c478bd9Sstevel@tonic-gate /* 13427c478bd9Sstevel@tonic-gate * If this symbol is defined in a non-allocatable section, 13437c478bd9Sstevel@tonic-gate * reduce it to local symbol. 13447c478bd9Sstevel@tonic-gate */ 13457c478bd9Sstevel@tonic-gate if (((isp = sdp->sd_isc) != 0) && isp->is_shdr && 13467c478bd9Sstevel@tonic-gate ((isp->is_shdr->sh_flags & SHF_ALLOC) == 0)) { 1347635216b6SRod Evans sdp->sd_flags |= (FLG_SY_REDUCED | FLG_SY_HIDDEN); 13487c478bd9Sstevel@tonic-gate } 13497c478bd9Sstevel@tonic-gate 13507c478bd9Sstevel@tonic-gate /* 13517c478bd9Sstevel@tonic-gate * If this symbol originated as a SHN_SUNW_IGNORE, it will have 13527c478bd9Sstevel@tonic-gate * been processed as an SHN_UNDEF. Return the symbol to its 13537c478bd9Sstevel@tonic-gate * original index for validation, and propagation to the output 13547c478bd9Sstevel@tonic-gate * file. 13557c478bd9Sstevel@tonic-gate */ 1356635216b6SRod Evans if (sdp->sd_flags & FLG_SY_IGNORE) 13570bc07c75Srie sdp->sd_shndx = SHN_SUNW_IGNORE; 13587c478bd9Sstevel@tonic-gate 13597c478bd9Sstevel@tonic-gate if (undef) { 13607c478bd9Sstevel@tonic-gate /* 13613b41b08bSab * If a non-weak reference remains undefined, or if a 13627c478bd9Sstevel@tonic-gate * mapfile reference is not bound to the relocatable 13637c478bd9Sstevel@tonic-gate * objects that make up the object being built, we have 13647c478bd9Sstevel@tonic-gate * a fatal error. 13657c478bd9Sstevel@tonic-gate * 13667c478bd9Sstevel@tonic-gate * The exceptions are symbols which are defined to be 13677c478bd9Sstevel@tonic-gate * found in the parent (FLG_SY_PARENT), which is really 13687c478bd9Sstevel@tonic-gate * only meaningful for direct binding, or are defined 13697c478bd9Sstevel@tonic-gate * external (FLG_SY_EXTERN) so as to suppress -zdefs 13707c478bd9Sstevel@tonic-gate * errors. 13717c478bd9Sstevel@tonic-gate * 13727c478bd9Sstevel@tonic-gate * Register symbols are always allowed to be UNDEF. 13737c478bd9Sstevel@tonic-gate * 13747c478bd9Sstevel@tonic-gate * Note that we don't include references created via -u 13757c478bd9Sstevel@tonic-gate * in the same shared object binding test. This is for 13767c478bd9Sstevel@tonic-gate * backward compatibility, in that a number of archive 13777c478bd9Sstevel@tonic-gate * makefile rules used -u to cause archive extraction. 13787c478bd9Sstevel@tonic-gate * These same rules have been cut and pasted to apply 13797c478bd9Sstevel@tonic-gate * to shared objects, and thus although the -u reference 13807c478bd9Sstevel@tonic-gate * is redundant, flagging it as fatal could cause some 13817c478bd9Sstevel@tonic-gate * build to fail. Also we have documented the use of 13827c478bd9Sstevel@tonic-gate * -u as a mechanism to cause binding to weak version 13837c478bd9Sstevel@tonic-gate * definitions, thus giving users an error condition 13847c478bd9Sstevel@tonic-gate * would be incorrect. 13857c478bd9Sstevel@tonic-gate */ 13867c478bd9Sstevel@tonic-gate if (!(sdp->sd_flags & FLG_SY_REGSYM) && 13870bc07c75Srie ((sym->st_shndx == SHN_UNDEF) && 13887c478bd9Sstevel@tonic-gate ((ELF_ST_BIND(sym->st_info) != STB_WEAK) && 13897c478bd9Sstevel@tonic-gate ((sdp->sd_flags & 13907c478bd9Sstevel@tonic-gate (FLG_SY_PARENT | FLG_SY_EXTERN)) == 0)) || 1391635216b6SRod Evans ((sdp->sd_flags & 1392635216b6SRod Evans (FLG_SY_MAPREF | FLG_SY_MAPUSED | FLG_SY_HIDDEN | 1393635216b6SRod Evans FLG_SY_PROTECT)) == FLG_SY_MAPREF))) { 13941007fd6fSAli Bahrami sym_undef_entry(ofl, sdp, UNDEF, undef, 13951007fd6fSAli Bahrami &undef_state); 13967c478bd9Sstevel@tonic-gate undeferr = 1; 13977c478bd9Sstevel@tonic-gate } 13987c478bd9Sstevel@tonic-gate 13997c478bd9Sstevel@tonic-gate } else { 14007c478bd9Sstevel@tonic-gate /* 14017c478bd9Sstevel@tonic-gate * For building things like shared objects (or anything 14027c478bd9Sstevel@tonic-gate * -znodefs), undefined symbols are allowed. 14037c478bd9Sstevel@tonic-gate * 14047c478bd9Sstevel@tonic-gate * If a mapfile reference remains undefined the user 14057c478bd9Sstevel@tonic-gate * would probably like a warning at least (they've 14067c478bd9Sstevel@tonic-gate * usually mis-spelt the reference). Refer to the above 14077c478bd9Sstevel@tonic-gate * comments for discussion on -u references, which 14087c478bd9Sstevel@tonic-gate * are not tested for in the same manner. 14097c478bd9Sstevel@tonic-gate */ 14107c478bd9Sstevel@tonic-gate if ((sdp->sd_flags & 14117c478bd9Sstevel@tonic-gate (FLG_SY_MAPREF | FLG_SY_MAPUSED)) == 14127c478bd9Sstevel@tonic-gate FLG_SY_MAPREF) { 14131007fd6fSAli Bahrami sym_undef_entry(ofl, sdp, UNDEF, FLG_OF_WARN, 14141007fd6fSAli Bahrami &undef_state); 14157c478bd9Sstevel@tonic-gate undeferr = 1; 14167c478bd9Sstevel@tonic-gate } 14177c478bd9Sstevel@tonic-gate } 14187c478bd9Sstevel@tonic-gate 14197c478bd9Sstevel@tonic-gate /* 14207c478bd9Sstevel@tonic-gate * If this symbol comes from a dependency mark the dependency 14217c478bd9Sstevel@tonic-gate * as required (-z ignore can result in unused dependencies 14227c478bd9Sstevel@tonic-gate * being dropped). If we need to record dependency versioning 14237c478bd9Sstevel@tonic-gate * information indicate what version of the needed shared object 14247c478bd9Sstevel@tonic-gate * this symbol is part of. Flag the symbol as undefined if it 14257c478bd9Sstevel@tonic-gate * has not been made available to us. 14267c478bd9Sstevel@tonic-gate */ 14277c478bd9Sstevel@tonic-gate if ((sdp->sd_ref == REF_DYN_NEED) && 14287c478bd9Sstevel@tonic-gate (!(sdp->sd_flags & FLG_SY_REFRSD))) { 14297c478bd9Sstevel@tonic-gate sdp->sd_file->ifl_flags |= FLG_IF_DEPREQD; 14307c478bd9Sstevel@tonic-gate 14317c478bd9Sstevel@tonic-gate /* 14327c478bd9Sstevel@tonic-gate * Capture that we've bound to a symbol that doesn't 14337c478bd9Sstevel@tonic-gate * allow being directly bound to. 14347c478bd9Sstevel@tonic-gate */ 1435635216b6SRod Evans if (sdp->sd_flags & FLG_SY_NDIR) 143628bda19cSRod Evans ofl->ofl_flags1 |= FLG_OF1_NGLBDIR; 14377c478bd9Sstevel@tonic-gate 14387c478bd9Sstevel@tonic-gate if (sdp->sd_file->ifl_vercnt) { 14397c478bd9Sstevel@tonic-gate int vndx; 144060758829Srie Ver_index *vip; 14417c478bd9Sstevel@tonic-gate 14427c478bd9Sstevel@tonic-gate vndx = sdp->sd_aux->sa_dverndx; 14437c478bd9Sstevel@tonic-gate vip = &sdp->sd_file->ifl_verndx[vndx]; 14447c478bd9Sstevel@tonic-gate if (vip->vi_flags & FLG_VER_AVAIL) { 14457c478bd9Sstevel@tonic-gate vip->vi_flags |= FLG_VER_REFER; 14467c478bd9Sstevel@tonic-gate } else { 14471007fd6fSAli Bahrami sym_undef_entry(ofl, sdp, NOTAVAIL, 14481007fd6fSAli Bahrami FLG_OF_FATAL, &undef_state); 14497c478bd9Sstevel@tonic-gate continue; 14507c478bd9Sstevel@tonic-gate } 14517c478bd9Sstevel@tonic-gate } 14527c478bd9Sstevel@tonic-gate } 14537c478bd9Sstevel@tonic-gate 14547c478bd9Sstevel@tonic-gate /* 14557c478bd9Sstevel@tonic-gate * Test that we do not bind to symbol supplied from an implicit 14567c478bd9Sstevel@tonic-gate * shared object. If a binding is from a weak reference it can 14577c478bd9Sstevel@tonic-gate * be ignored. 14587c478bd9Sstevel@tonic-gate */ 14597c478bd9Sstevel@tonic-gate if (needed && !undeferr && (sdp->sd_flags & FLG_SY_GLOBREF) && 14607c478bd9Sstevel@tonic-gate (sdp->sd_ref == REF_DYN_NEED) && 14617c478bd9Sstevel@tonic-gate (sdp->sd_flags & FLG_SY_NOTAVAIL)) { 14621007fd6fSAli Bahrami sym_undef_entry(ofl, sdp, IMPLICIT, needed, 14631007fd6fSAli Bahrami &undef_state); 14641007fd6fSAli Bahrami if (needed == FLG_OF_FATAL) 14651007fd6fSAli Bahrami continue; 14667c478bd9Sstevel@tonic-gate } 14677c478bd9Sstevel@tonic-gate 14687c478bd9Sstevel@tonic-gate /* 14697c478bd9Sstevel@tonic-gate * Test that a symbol isn't going to be reduced to local scope 14707c478bd9Sstevel@tonic-gate * which actually wants to bind to a shared object - if so it's 14717c478bd9Sstevel@tonic-gate * a fatal error. 14727c478bd9Sstevel@tonic-gate */ 14737c478bd9Sstevel@tonic-gate if ((sdp->sd_ref == REF_DYN_NEED) && 1474635216b6SRod Evans (sdp->sd_flags & (FLG_SY_HIDDEN | FLG_SY_PROTECT))) { 14751007fd6fSAli Bahrami sym_undef_entry(ofl, sdp, BNDLOCAL, FLG_OF_FATAL, 14761007fd6fSAli Bahrami &undef_state); 14777c478bd9Sstevel@tonic-gate continue; 14787c478bd9Sstevel@tonic-gate } 14797c478bd9Sstevel@tonic-gate 14807c478bd9Sstevel@tonic-gate /* 14817c478bd9Sstevel@tonic-gate * If the output image is to be versioned then all symbol 148228bda19cSRod Evans * definitions must be associated with a version. Remove any 148328bda19cSRod Evans * versioning that might be left associated with an undefined 148428bda19cSRod Evans * symbol. 14857c478bd9Sstevel@tonic-gate */ 148628bda19cSRod Evans if (verdesc && (sdp->sd_ref == REF_REL_NEED)) { 148728bda19cSRod Evans if (sym->st_shndx == SHN_UNDEF) { 148828bda19cSRod Evans if (sdp->sd_aux && sdp->sd_aux->sa_overndx) 148928bda19cSRod Evans sdp->sd_aux->sa_overndx = 0; 149028bda19cSRod Evans } else { 149108278a5eSRod Evans if (!SYM_IS_HIDDEN(sdp) && sdp->sd_aux && 149228bda19cSRod Evans (sdp->sd_aux->sa_overndx == 0)) { 14931007fd6fSAli Bahrami sym_undef_entry(ofl, sdp, NOVERSION, 14941007fd6fSAli Bahrami verdesc, &undef_state); 149528bda19cSRod Evans continue; 149628bda19cSRod Evans } 149728bda19cSRod Evans } 14987c478bd9Sstevel@tonic-gate } 14997c478bd9Sstevel@tonic-gate 15007c478bd9Sstevel@tonic-gate /* 15017c478bd9Sstevel@tonic-gate * If we don't need the symbol there's no need to process it 15027c478bd9Sstevel@tonic-gate * any further. 15037c478bd9Sstevel@tonic-gate */ 15047c478bd9Sstevel@tonic-gate if (sdp->sd_ref == REF_DYN_SEEN) 15057c478bd9Sstevel@tonic-gate continue; 15067c478bd9Sstevel@tonic-gate 15077c478bd9Sstevel@tonic-gate /* 15087c478bd9Sstevel@tonic-gate * Calculate the size and alignment requirements for the global 15097c478bd9Sstevel@tonic-gate * .bss and .tls sections. If we're building a relocatable 15107c478bd9Sstevel@tonic-gate * object only account for scoped COMMON symbols (these will 15117c478bd9Sstevel@tonic-gate * be converted to .bss references). 15127c478bd9Sstevel@tonic-gate * 151335450702SAli Bahrami * When -z nopartial is in effect, partially initialized 151435450702SAli Bahrami * symbols are directed to the special .data section 151535450702SAli Bahrami * created for that purpose (ofl->ofl_isparexpn). 151635450702SAli Bahrami * Otherwise, partially initialized symbols go to .bss. 15177c478bd9Sstevel@tonic-gate * 15187c478bd9Sstevel@tonic-gate * Also refer to make_mvsections() in sunwmove.c 15197c478bd9Sstevel@tonic-gate */ 15200bc07c75Srie if ((sym->st_shndx == SHN_COMMON) && 15210bc07c75Srie (((oflags & FLG_OF_RELOBJ) == 0) || 1522*c524b4feSRichard Lowe ld_sym_reducable(ofl, sdp))) { 152357ef7aa9SRod Evans if ((sdp->sd_move == NULL) || 152435450702SAli Bahrami ((sdp->sd_flags & FLG_SY_PAREXPN) == 0)) { 1525d579eb63Sab if (type != STT_TLS) { 1526e64d0ff9SAli Bahrami need_bss = TRUE; 1527e64d0ff9SAli Bahrami bsssize = (Xword)S_ROUND(bsssize, 1528e64d0ff9SAli Bahrami sym->st_value) + sym->st_size; 1529e64d0ff9SAli Bahrami if (sym->st_value > bssalign) 1530e64d0ff9SAli Bahrami bssalign = sym->st_value; 15317c478bd9Sstevel@tonic-gate } else { 1532e64d0ff9SAli Bahrami need_tlsbss = TRUE; 1533e64d0ff9SAli Bahrami tlssize = (Xword)S_ROUND(tlssize, 1534e64d0ff9SAli Bahrami sym->st_value) + sym->st_size; 1535e64d0ff9SAli Bahrami if (sym->st_value > tlsalign) 1536e64d0ff9SAli Bahrami tlsalign = sym->st_value; 15377c478bd9Sstevel@tonic-gate } 15387c478bd9Sstevel@tonic-gate } 15397c478bd9Sstevel@tonic-gate } 15407c478bd9Sstevel@tonic-gate 1541ba2be530Sab #if defined(_ELF64) 154254d82594Sseizo /* 154354d82594Sseizo * Calculate the size and alignment requirement for the global 154454d82594Sseizo * .lbss. TLS or partially initialized symbols do not need to be 154554d82594Sseizo * considered yet. 154654d82594Sseizo */ 1547ba2be530Sab if ((ld_targ.t_m.m_mach == EM_AMD64) && 1548ba2be530Sab (sym->st_shndx == SHN_X86_64_LCOMMON)) { 1549e64d0ff9SAli Bahrami need_lbss = TRUE; 155054d82594Sseizo lbsssize = (Xword)S_ROUND(lbsssize, sym->st_value) + 155133eb6ee1Sab sym->st_size; 155254d82594Sseizo if (sym->st_value > lbssalign) 155354d82594Sseizo lbssalign = sym->st_value; 155454d82594Sseizo } 155554d82594Sseizo #endif 15567c478bd9Sstevel@tonic-gate /* 15577c478bd9Sstevel@tonic-gate * If a symbol was referenced via the command line 15587c478bd9Sstevel@tonic-gate * (ld -u <>, ...), then this counts as a reference against the 15597c478bd9Sstevel@tonic-gate * symbol. Mark any section that symbol is defined in. 15607c478bd9Sstevel@tonic-gate */ 15617c478bd9Sstevel@tonic-gate if (((isp = sdp->sd_isc) != 0) && 15627c478bd9Sstevel@tonic-gate (sdp->sd_flags & FLG_SY_CMDREF)) { 15637c478bd9Sstevel@tonic-gate isp->is_flags |= FLG_IS_SECTREF; 15647c478bd9Sstevel@tonic-gate isp->is_file->ifl_flags |= FLG_IF_FILEREF; 15657c478bd9Sstevel@tonic-gate } 15667c478bd9Sstevel@tonic-gate 15677c478bd9Sstevel@tonic-gate /* 15687c478bd9Sstevel@tonic-gate * Update the symbol count and the associated name string size. 156908278a5eSRod Evans * Note, a capabilities symbol must remain as visible as a 157008278a5eSRod Evans * global symbol. However, the runtime linker recognizes the 157108278a5eSRod Evans * hidden requirement and ensures the symbol isn't made globally 157208278a5eSRod Evans * available at runtime. 15737c478bd9Sstevel@tonic-gate */ 1574*c524b4feSRichard Lowe if (ld_sym_reducable(ofl, sdp)) { 15757c478bd9Sstevel@tonic-gate /* 157660758829Srie * If any reductions are being processed, keep a count 157760758829Srie * of eliminated symbols, and if the symbol is being 157860758829Srie * reduced to local, count it's size for the .symtab. 15797c478bd9Sstevel@tonic-gate */ 1580635216b6SRod Evans if (sdp->sd_flags & FLG_SY_ELIM) { 15817c478bd9Sstevel@tonic-gate ofl->ofl_elimcnt++; 15827c478bd9Sstevel@tonic-gate } else { 15837c478bd9Sstevel@tonic-gate ofl->ofl_scopecnt++; 15847c478bd9Sstevel@tonic-gate if ((((sdp->sd_flags & FLG_SY_REGSYM) == 0) || 15857c478bd9Sstevel@tonic-gate sym->st_name) && (st_insert(ofl->ofl_strtab, 15867c478bd9Sstevel@tonic-gate sdp->sd_name) == -1)) 15877c478bd9Sstevel@tonic-gate return (S_ERROR); 15889039eeafSab if (allow_ldynsym && sym->st_name && 1589d579eb63Sab ldynsym_symtype[type]) { 15909039eeafSab ofl->ofl_dynscopecnt++; 15919039eeafSab if (st_insert(ofl->ofl_dynstrtab, 15929039eeafSab sdp->sd_name) == -1) 15939039eeafSab return (S_ERROR); 1594d579eb63Sab /* Include it in sort section? */ 1595d579eb63Sab DYNSORT_COUNT(sdp, sym, type, ++); 15969039eeafSab } 15977c478bd9Sstevel@tonic-gate } 15987c478bd9Sstevel@tonic-gate } else { 15997c478bd9Sstevel@tonic-gate ofl->ofl_globcnt++; 16007c478bd9Sstevel@tonic-gate 1601d579eb63Sab /* 1602635216b6SRod Evans * Check to see if this global variable should go into 1603635216b6SRod Evans * a sort section. Sort sections require a 1604635216b6SRod Evans * .SUNW_ldynsym section, so, don't check unless a 1605635216b6SRod Evans * .SUNW_ldynsym is allowed. 1606d579eb63Sab */ 1607635216b6SRod Evans if (allow_ldynsym) 1608d579eb63Sab DYNSORT_COUNT(sdp, sym, type, ++); 1609d579eb63Sab 16107c478bd9Sstevel@tonic-gate /* 16117c478bd9Sstevel@tonic-gate * If global direct bindings are in effect, or this 16127c478bd9Sstevel@tonic-gate * symbol has bound to a dependency which was specified 16137c478bd9Sstevel@tonic-gate * as requiring direct bindings, and it hasn't 16147c478bd9Sstevel@tonic-gate * explicitly been defined as a non-direct binding 16157c478bd9Sstevel@tonic-gate * symbol, mark it. 16167c478bd9Sstevel@tonic-gate */ 16177c478bd9Sstevel@tonic-gate if (((ofl->ofl_dtflags_1 & DF_1_DIRECT) || (isp && 16187c478bd9Sstevel@tonic-gate (isp->is_file->ifl_flags & FLG_IF_DIRECT))) && 1619635216b6SRod Evans ((sdp->sd_flags & FLG_SY_NDIR) == 0)) 1620635216b6SRod Evans sdp->sd_flags |= FLG_SY_DIR; 16217c478bd9Sstevel@tonic-gate 16227c478bd9Sstevel@tonic-gate /* 16237c478bd9Sstevel@tonic-gate * Insert the symbol name. 16247c478bd9Sstevel@tonic-gate */ 16257c478bd9Sstevel@tonic-gate if (((sdp->sd_flags & FLG_SY_REGSYM) == 0) || 16267c478bd9Sstevel@tonic-gate sym->st_name) { 16277c478bd9Sstevel@tonic-gate if (st_insert(ofl->ofl_strtab, 16287c478bd9Sstevel@tonic-gate sdp->sd_name) == -1) 16297c478bd9Sstevel@tonic-gate return (S_ERROR); 16307c478bd9Sstevel@tonic-gate 16317c478bd9Sstevel@tonic-gate if (!(ofl->ofl_flags & FLG_OF_RELOBJ) && 16327c478bd9Sstevel@tonic-gate (st_insert(ofl->ofl_dynstrtab, 16337c478bd9Sstevel@tonic-gate sdp->sd_name) == -1)) 16347c478bd9Sstevel@tonic-gate return (S_ERROR); 16357c478bd9Sstevel@tonic-gate } 16367c478bd9Sstevel@tonic-gate 16377c478bd9Sstevel@tonic-gate /* 16387c478bd9Sstevel@tonic-gate * If this section offers a global symbol - record that 16397c478bd9Sstevel@tonic-gate * fact. 16407c478bd9Sstevel@tonic-gate */ 16417c478bd9Sstevel@tonic-gate if (isp) { 16427c478bd9Sstevel@tonic-gate isp->is_flags |= FLG_IS_SECTREF; 16437c478bd9Sstevel@tonic-gate isp->is_file->ifl_flags |= FLG_IF_FILEREF; 16447c478bd9Sstevel@tonic-gate } 16457c478bd9Sstevel@tonic-gate } 16467c478bd9Sstevel@tonic-gate } 16477c478bd9Sstevel@tonic-gate 16481007fd6fSAli Bahrami /* 16491007fd6fSAli Bahrami * Guidance: Use -z defs|nodefs when building shared objects. 16501007fd6fSAli Bahrami * 16511007fd6fSAli Bahrami * Our caller issues this, unless we mask it out here. So we mask it 16521007fd6fSAli Bahrami * out unless we've issued at least one warnings or fatal error. 16531007fd6fSAli Bahrami */ 16541007fd6fSAli Bahrami if (!((oflags & FLG_OF_SHAROBJ) && OFL_GUIDANCE(ofl, FLG_OFG_NO_DEFS) && 16551007fd6fSAli Bahrami (undef_state & (FLG_OF_FATAL | FLG_OF_WARN)))) 16561007fd6fSAli Bahrami ofl->ofl_guideflags |= FLG_OFG_NO_DEFS; 16571007fd6fSAli Bahrami 16587c478bd9Sstevel@tonic-gate /* 16597c478bd9Sstevel@tonic-gate * If we've encountered a fatal error during symbol validation then 16607c478bd9Sstevel@tonic-gate * return now. 16617c478bd9Sstevel@tonic-gate */ 16627c478bd9Sstevel@tonic-gate if (ofl->ofl_flags & FLG_OF_FATAL) 16637c478bd9Sstevel@tonic-gate return (1); 16647c478bd9Sstevel@tonic-gate 16657c478bd9Sstevel@tonic-gate /* 16667c478bd9Sstevel@tonic-gate * Now that symbol resolution is completed, scan any register symbols. 16677c478bd9Sstevel@tonic-gate * From now on, we're only interested in those that contribute to the 16687c478bd9Sstevel@tonic-gate * output file. 16697c478bd9Sstevel@tonic-gate */ 16707c478bd9Sstevel@tonic-gate if (ofl->ofl_regsyms) { 16717c478bd9Sstevel@tonic-gate int ndx; 16727c478bd9Sstevel@tonic-gate 16737c478bd9Sstevel@tonic-gate for (ndx = 0; ndx < ofl->ofl_regsymsno; ndx++) { 16746b3ba5bdSAli Bahrami if ((sdp = ofl->ofl_regsyms[ndx]) == NULL) 16757c478bd9Sstevel@tonic-gate continue; 16767c478bd9Sstevel@tonic-gate if (sdp->sd_ref != REF_REL_NEED) { 16776b3ba5bdSAli Bahrami ofl->ofl_regsyms[ndx] = NULL; 16787c478bd9Sstevel@tonic-gate continue; 16797c478bd9Sstevel@tonic-gate } 16807c478bd9Sstevel@tonic-gate 16817c478bd9Sstevel@tonic-gate ofl->ofl_regsymcnt++; 16827c478bd9Sstevel@tonic-gate if (sdp->sd_sym->st_name == 0) 16837c478bd9Sstevel@tonic-gate sdp->sd_name = MSG_ORIG(MSG_STR_EMPTY); 16847c478bd9Sstevel@tonic-gate 168508278a5eSRod Evans if (SYM_IS_HIDDEN(sdp) || 16867c478bd9Sstevel@tonic-gate (ELF_ST_BIND(sdp->sd_sym->st_info) == STB_LOCAL)) 16877c478bd9Sstevel@tonic-gate ofl->ofl_lregsymcnt++; 16887c478bd9Sstevel@tonic-gate } 16897c478bd9Sstevel@tonic-gate } 16907c478bd9Sstevel@tonic-gate 16917c478bd9Sstevel@tonic-gate /* 16927c478bd9Sstevel@tonic-gate * Generate the .bss section now that we know its size and alignment. 16937c478bd9Sstevel@tonic-gate */ 1694e64d0ff9SAli Bahrami if (need_bss) { 169557ef7aa9SRod Evans if (ld_make_bss(ofl, bsssize, bssalign, 169657ef7aa9SRod Evans ld_targ.t_id.id_bss) == S_ERROR) 16977c478bd9Sstevel@tonic-gate return (S_ERROR); 16987c478bd9Sstevel@tonic-gate } 1699e64d0ff9SAli Bahrami if (need_tlsbss) { 170057ef7aa9SRod Evans if (ld_make_bss(ofl, tlssize, tlsalign, 170157ef7aa9SRod Evans ld_targ.t_id.id_tlsbss) == S_ERROR) 170254d82594Sseizo return (S_ERROR); 170354d82594Sseizo } 1704ba2be530Sab #if defined(_ELF64) 1705ba2be530Sab if ((ld_targ.t_m.m_mach == EM_AMD64) && 1706e64d0ff9SAli Bahrami need_lbss && !(oflags & FLG_OF_RELOBJ)) { 170757ef7aa9SRod Evans if (ld_make_bss(ofl, lbsssize, lbssalign, 170857ef7aa9SRod Evans ld_targ.t_id.id_lbss) == S_ERROR) 17097c478bd9Sstevel@tonic-gate return (S_ERROR); 17107c478bd9Sstevel@tonic-gate } 171154d82594Sseizo #endif 17127c478bd9Sstevel@tonic-gate /* 17137c478bd9Sstevel@tonic-gate * Determine what entry point symbol we need, and if found save its 17147c478bd9Sstevel@tonic-gate * symbol descriptor so that we can update the ELF header entry with the 17157c478bd9Sstevel@tonic-gate * symbols value later (see update_oehdr). Make sure the symbol is 1716c1c6f601Srie * tagged to ensure its update in case -s is in effect. Use any -e 17177c478bd9Sstevel@tonic-gate * option first, or the default entry points `_start' and `main'. 17187c478bd9Sstevel@tonic-gate */ 1719c1c6f601Srie ret = 0; 17207c478bd9Sstevel@tonic-gate if (ofl->ofl_entry) { 172128bda19cSRod Evans if ((sdp = ld_sym_find(ofl->ofl_entry, SYM_NOHASH, 172228bda19cSRod Evans NULL, ofl)) == NULL) { 17231007fd6fSAli Bahrami ld_eprintf(ofl, ERR_FATAL, MSG_INTL(MSG_ARG_NOENTRY), 17241007fd6fSAli Bahrami ofl->ofl_entry); 17251d1fba8aSrie ret++; 17261d1fba8aSrie } else if (ensure_sym_local(ofl, sdp, 17271d1fba8aSrie MSG_INTL(MSG_SYM_ENTRY)) != 0) { 1728c1c6f601Srie ret++; 17291d1fba8aSrie } else { 17301d1fba8aSrie ofl->ofl_entry = (void *)sdp; 17317c478bd9Sstevel@tonic-gate } 17325aefb655Srie } else if (((sdp = ld_sym_find(MSG_ORIG(MSG_SYM_START), 173328bda19cSRod Evans SYM_NOHASH, NULL, ofl)) != NULL) && (ensure_sym_local(ofl, 1734c1c6f601Srie sdp, 0) == 0)) { 17357c478bd9Sstevel@tonic-gate ofl->ofl_entry = (void *)sdp; 1736c1c6f601Srie 17375aefb655Srie } else if (((sdp = ld_sym_find(MSG_ORIG(MSG_SYM_MAIN), 173828bda19cSRod Evans SYM_NOHASH, NULL, ofl)) != NULL) && (ensure_sym_local(ofl, 1739c1c6f601Srie sdp, 0) == 0)) { 17407c478bd9Sstevel@tonic-gate ofl->ofl_entry = (void *)sdp; 17417c478bd9Sstevel@tonic-gate } 17427c478bd9Sstevel@tonic-gate 17437c478bd9Sstevel@tonic-gate /* 1744c1c6f601Srie * If ld -zdtrace=<sym> was given, then validate that the symbol is 1745c1c6f601Srie * defined within the current object being built. 17467c478bd9Sstevel@tonic-gate */ 17471d1fba8aSrie if ((sdp = ofl->ofl_dtracesym) != 0) 1748c1c6f601Srie ret += ensure_sym_local(ofl, sdp, MSG_ORIG(MSG_STR_DTRACE)); 17497c478bd9Sstevel@tonic-gate 1750c1c6f601Srie /* 1751c1c6f601Srie * If any initarray, finiarray or preinitarray functions have been 1752c1c6f601Srie * requested, make sure they are defined within the current object 1753c1c6f601Srie * being built. 1754c1c6f601Srie */ 175557ef7aa9SRod Evans if (ofl->ofl_initarray) { 175657ef7aa9SRod Evans ret += ensure_array_local(ofl, ofl->ofl_initarray, 1757c1c6f601Srie MSG_ORIG(MSG_SYM_INITARRAY)); 1758c1c6f601Srie } 175957ef7aa9SRod Evans if (ofl->ofl_finiarray) { 176057ef7aa9SRod Evans ret += ensure_array_local(ofl, ofl->ofl_finiarray, 1761c1c6f601Srie MSG_ORIG(MSG_SYM_FINIARRAY)); 1762c1c6f601Srie } 176357ef7aa9SRod Evans if (ofl->ofl_preiarray) { 176457ef7aa9SRod Evans ret += ensure_array_local(ofl, ofl->ofl_preiarray, 1765c1c6f601Srie MSG_ORIG(MSG_SYM_PREINITARRAY)); 1766c1c6f601Srie } 1767c1c6f601Srie 1768c1c6f601Srie if (ret) 1769c1c6f601Srie return (S_ERROR); 1770c1c6f601Srie 17717c478bd9Sstevel@tonic-gate /* 17727c478bd9Sstevel@tonic-gate * If we're required to record any needed dependencies versioning 17737c478bd9Sstevel@tonic-gate * information calculate it now that all symbols have been validated. 17747c478bd9Sstevel@tonic-gate */ 17757c478bd9Sstevel@tonic-gate if ((oflags & (FLG_OF_VERNEED | FLG_OF_NOVERSEC)) == FLG_OF_VERNEED) 17765aefb655Srie return (ld_vers_check_need(ofl)); 17777c478bd9Sstevel@tonic-gate else 17787c478bd9Sstevel@tonic-gate return (1); 17797c478bd9Sstevel@tonic-gate } 17807c478bd9Sstevel@tonic-gate 17817c478bd9Sstevel@tonic-gate /* 17827c478bd9Sstevel@tonic-gate * qsort(3c) comparison function. As an optimization for associating weak 17837c478bd9Sstevel@tonic-gate * symbols to their strong counterparts sort global symbols according to their 17846b3ba5bdSAli Bahrami * section index, address and binding. 17857c478bd9Sstevel@tonic-gate */ 17867c478bd9Sstevel@tonic-gate static int 17876b3ba5bdSAli Bahrami compare(const void *sdpp1, const void *sdpp2) 17887c478bd9Sstevel@tonic-gate { 17896b3ba5bdSAli Bahrami Sym_desc *sdp1 = *((Sym_desc **)sdpp1); 17906b3ba5bdSAli Bahrami Sym_desc *sdp2 = *((Sym_desc **)sdpp2); 17916b3ba5bdSAli Bahrami Sym *sym1, *sym2; 17927c478bd9Sstevel@tonic-gate uchar_t bind1, bind2; 17937c478bd9Sstevel@tonic-gate 17947c478bd9Sstevel@tonic-gate /* 17957c478bd9Sstevel@tonic-gate * Symbol descriptors may be zero, move these to the front of the 17967c478bd9Sstevel@tonic-gate * sorted array. 17977c478bd9Sstevel@tonic-gate */ 17986b3ba5bdSAli Bahrami if (sdp1 == NULL) 17997c478bd9Sstevel@tonic-gate return (-1); 18006b3ba5bdSAli Bahrami if (sdp2 == NULL) 18017c478bd9Sstevel@tonic-gate return (1); 18027c478bd9Sstevel@tonic-gate 18037c478bd9Sstevel@tonic-gate sym1 = sdp1->sd_sym; 18047c478bd9Sstevel@tonic-gate sym2 = sdp2->sd_sym; 18057c478bd9Sstevel@tonic-gate 18066b3ba5bdSAli Bahrami /* 18076b3ba5bdSAli Bahrami * Compare the symbols section index. This is important when sorting 18086b3ba5bdSAli Bahrami * the symbol tables of relocatable objects. In this case, a symbols 18096b3ba5bdSAli Bahrami * value is the offset within the associated section, and thus many 18106b3ba5bdSAli Bahrami * symbols can have the same value, but are effectively different 18116b3ba5bdSAli Bahrami * addresses. 18126b3ba5bdSAli Bahrami */ 18136b3ba5bdSAli Bahrami if (sym1->st_shndx > sym2->st_shndx) 18146b3ba5bdSAli Bahrami return (1); 18156b3ba5bdSAli Bahrami if (sym1->st_shndx < sym2->st_shndx) 18166b3ba5bdSAli Bahrami return (-1); 18176b3ba5bdSAli Bahrami 18187c478bd9Sstevel@tonic-gate /* 18197c478bd9Sstevel@tonic-gate * Compare the symbols value (address). 18207c478bd9Sstevel@tonic-gate */ 18217c478bd9Sstevel@tonic-gate if (sym1->st_value > sym2->st_value) 18227c478bd9Sstevel@tonic-gate return (1); 18237c478bd9Sstevel@tonic-gate if (sym1->st_value < sym2->st_value) 18247c478bd9Sstevel@tonic-gate return (-1); 18257c478bd9Sstevel@tonic-gate 18267c478bd9Sstevel@tonic-gate bind1 = ELF_ST_BIND(sym1->st_info); 18277c478bd9Sstevel@tonic-gate bind2 = ELF_ST_BIND(sym2->st_info); 18287c478bd9Sstevel@tonic-gate 18297c478bd9Sstevel@tonic-gate /* 18307c478bd9Sstevel@tonic-gate * If two symbols have the same address place the weak symbol before 18317c478bd9Sstevel@tonic-gate * any strong counterpart. 18327c478bd9Sstevel@tonic-gate */ 18337c478bd9Sstevel@tonic-gate if (bind1 > bind2) 18347c478bd9Sstevel@tonic-gate return (-1); 18357c478bd9Sstevel@tonic-gate if (bind1 < bind2) 18367c478bd9Sstevel@tonic-gate return (1); 18377c478bd9Sstevel@tonic-gate 18387c478bd9Sstevel@tonic-gate return (0); 18397c478bd9Sstevel@tonic-gate } 18407c478bd9Sstevel@tonic-gate 184169a0bf0cSab /* 184269a0bf0cSab * Issue a MSG_SYM_BADADDR error from ld_sym_process(). This error 184369a0bf0cSab * is issued when a symbol address/size is not contained by the 184469a0bf0cSab * target section. 184569a0bf0cSab * 184669a0bf0cSab * Such objects are at least partially corrupt, and the user would 184769a0bf0cSab * be well advised to be skeptical of them, and to ask their compiler 184869a0bf0cSab * supplier to fix the problem. However, a distinction needs to be 184969a0bf0cSab * made between symbols that reference readonly text, and those that 185069a0bf0cSab * access writable data. Other than throwing off profiling results, 185169a0bf0cSab * the readonly section case is less serious. We have encountered 185269a0bf0cSab * such objects in the field. In order to allow existing objects 185369a0bf0cSab * to continue working, we issue a warning rather than a fatal error 185469a0bf0cSab * if the symbol is against readonly text. Other cases are fatal. 185569a0bf0cSab */ 185669a0bf0cSab static void 185769a0bf0cSab issue_badaddr_msg(Ifl_desc *ifl, Ofl_desc *ofl, Sym_desc *sdp, 185869a0bf0cSab Sym *sym, Word shndx) 185969a0bf0cSab { 18601d9df23bSab Error err; 18611d9df23bSab const char *msg; 186269a0bf0cSab 186369a0bf0cSab if ((sdp->sd_isc->is_shdr->sh_flags & (SHF_WRITE | SHF_ALLOC)) == 186469a0bf0cSab SHF_ALLOC) { 186569a0bf0cSab msg = MSG_INTL(MSG_SYM_BADADDR_ROTXT); 186669a0bf0cSab err = ERR_WARNING; 186769a0bf0cSab } else { 186869a0bf0cSab msg = MSG_INTL(MSG_SYM_BADADDR); 186969a0bf0cSab err = ERR_FATAL; 187069a0bf0cSab } 187169a0bf0cSab 18721007fd6fSAli Bahrami ld_eprintf(ofl, err, msg, demangle(sdp->sd_name), 187369a0bf0cSab ifl->ifl_name, shndx, sdp->sd_isc->is_name, 187469a0bf0cSab EC_XWORD(sdp->sd_isc->is_shdr->sh_size), 187569a0bf0cSab EC_XWORD(sym->st_value), EC_XWORD(sym->st_size)); 187669a0bf0cSab } 187769a0bf0cSab 187808278a5eSRod Evans /* 187908278a5eSRod Evans * Global symbols that are candidates for translation to local capability 188008278a5eSRod Evans * symbols under -z symbolcap, are maintained on a local symbol list. Once 188108278a5eSRod Evans * all symbols of a file are processed, this list is traversed to cull any 188208278a5eSRod Evans * unnecessary weak symbol aliases. 188308278a5eSRod Evans */ 188408278a5eSRod Evans typedef struct { 188508278a5eSRod Evans Sym_desc *c_nsdp; /* new lead symbol */ 188608278a5eSRod Evans Sym_desc *c_osdp; /* original symbol */ 188708278a5eSRod Evans Cap_group *c_group; /* symbol capability group */ 188808278a5eSRod Evans Word c_ndx; /* symbol index */ 188908278a5eSRod Evans } Cap_pair; 189069a0bf0cSab 18917c478bd9Sstevel@tonic-gate /* 18927c478bd9Sstevel@tonic-gate * Process the symbol table for the specified input file. At this point all 18937c478bd9Sstevel@tonic-gate * input sections from this input file have been assigned an input section 18947c478bd9Sstevel@tonic-gate * descriptor which is saved in the `ifl_isdesc' array. 18957c478bd9Sstevel@tonic-gate * 1896*c524b4feSRichard Lowe * - local symbols are saved (as is) if the input file is a relocatable 189708278a5eSRod Evans * object 18987c478bd9Sstevel@tonic-gate * 189908278a5eSRod Evans * - global symbols are added to the linkers internal symbol table if they 190008278a5eSRod Evans * are not already present, otherwise a symbol resolution function is 190108278a5eSRod Evans * called upon to resolve the conflict. 19027c478bd9Sstevel@tonic-gate */ 19037c478bd9Sstevel@tonic-gate uintptr_t 19045aefb655Srie ld_sym_process(Is_desc *isc, Ifl_desc *ifl, Ofl_desc *ofl) 19057c478bd9Sstevel@tonic-gate { 190675e45495Sab /* 190775e45495Sab * This macro tests the given symbol to see if it is out of 190875e45495Sab * range relative to the section it references. 190975e45495Sab * 191075e45495Sab * entry: 191175e45495Sab * - ifl is a relative object (ET_REL) 191275e45495Sab * _sdp - Symbol descriptor 191375e45495Sab * _sym - Symbol 191475e45495Sab * _type - Symbol type 191575e45495Sab * 191675e45495Sab * The following are tested: 191775e45495Sab * - Symbol length is non-zero 191875e45495Sab * - Symbol type is a type that references code or data 191975e45495Sab * - Referenced section is not 0 (indicates an UNDEF symbol) 192075e45495Sab * and is not in the range of special values above SHN_LORESERVE 192175e45495Sab * (excluding SHN_XINDEX, which is OK). 192275e45495Sab * - We have a valid section header for the target section 192375e45495Sab * 192475e45495Sab * If the above are all true, and the symbol position is not 192575e45495Sab * contained by the target section, this macro evaluates to 192675e45495Sab * True (1). Otherwise, False(0). 192775e45495Sab */ 192875e45495Sab #define SYM_LOC_BADADDR(_sdp, _sym, _type) \ 1929d579eb63Sab (_sym->st_size && dynsymsort_symtype[_type] && \ 193075e45495Sab (_sym->st_shndx != SHN_UNDEF) && \ 193175e45495Sab ((_sym->st_shndx < SHN_LORESERVE) || \ 193275e45495Sab (_sym->st_shndx == SHN_XINDEX)) && \ 193375e45495Sab _sdp->sd_isc && _sdp->sd_isc->is_shdr && \ 193475e45495Sab ((_sym->st_value + _sym->st_size) > _sdp->sd_isc->is_shdr->sh_size)) 193575e45495Sab 1936de777a60Sab Conv_inv_buf_t inv_buf; 19377c478bd9Sstevel@tonic-gate Sym *sym = (Sym *)isc->is_indata->d_buf; 19386b3ba5bdSAli Bahrami Word *symshndx = NULL; 19397c478bd9Sstevel@tonic-gate Shdr *shdr = isc->is_shdr; 19407c478bd9Sstevel@tonic-gate Sym_desc *sdp; 19417c478bd9Sstevel@tonic-gate size_t strsize; 19427c478bd9Sstevel@tonic-gate char *strs; 19437c478bd9Sstevel@tonic-gate uchar_t type, bind; 19447c478bd9Sstevel@tonic-gate Word ndx, hash, local, total; 19454f680cc6SAli Bahrami uchar_t osabi = ifl->ifl_ehdr->e_ident[EI_OSABI]; 19464f680cc6SAli Bahrami Half mach = ifl->ifl_ehdr->e_machine; 19477c478bd9Sstevel@tonic-gate Half etype = ifl->ifl_ehdr->e_type; 194875e45495Sab int etype_rel; 19497c478bd9Sstevel@tonic-gate const char *symsecname, *strsecname; 19504a8d0ea7SAli Bahrami Word symsecndx; 19517c478bd9Sstevel@tonic-gate avl_index_t where; 19526b3ba5bdSAli Bahrami int test_gnu_hidden_bit, weak; 195308278a5eSRod Evans Cap_desc *cdp = NULL; 195408278a5eSRod Evans Alist *cappairs = NULL; 19557c478bd9Sstevel@tonic-gate 19567c478bd9Sstevel@tonic-gate /* 19577c478bd9Sstevel@tonic-gate * Its possible that a file may contain more that one symbol table, 19587c478bd9Sstevel@tonic-gate * ie. .dynsym and .symtab in a shared library. Only process the first 19597c478bd9Sstevel@tonic-gate * table (here, we assume .dynsym comes before .symtab). 19607c478bd9Sstevel@tonic-gate */ 19617c478bd9Sstevel@tonic-gate if (ifl->ifl_symscnt) 19627c478bd9Sstevel@tonic-gate return (1); 19637c478bd9Sstevel@tonic-gate 19647c478bd9Sstevel@tonic-gate if (isc->is_symshndx) 19657c478bd9Sstevel@tonic-gate symshndx = isc->is_symshndx->is_indata->d_buf; 19667c478bd9Sstevel@tonic-gate 19675aefb655Srie DBG_CALL(Dbg_syms_process(ofl->ofl_lml, ifl)); 19687c478bd9Sstevel@tonic-gate 19694a8d0ea7SAli Bahrami symsecndx = isc->is_scnndx; 19707c478bd9Sstevel@tonic-gate if (isc->is_name) 19717c478bd9Sstevel@tonic-gate symsecname = isc->is_name; 19727c478bd9Sstevel@tonic-gate else 19737c478bd9Sstevel@tonic-gate symsecname = MSG_ORIG(MSG_STR_EMPTY); 19747c478bd9Sstevel@tonic-gate 19757c478bd9Sstevel@tonic-gate /* 19767c478bd9Sstevel@tonic-gate * From the symbol tables section header information determine which 19777c478bd9Sstevel@tonic-gate * strtab table is needed to locate the actual symbol names. 19787c478bd9Sstevel@tonic-gate */ 19797c478bd9Sstevel@tonic-gate if (ifl->ifl_flags & FLG_IF_HSTRTAB) { 19807c478bd9Sstevel@tonic-gate ndx = shdr->sh_link; 19817c478bd9Sstevel@tonic-gate if ((ndx == 0) || (ndx >= ifl->ifl_shnum)) { 19821007fd6fSAli Bahrami ld_eprintf(ofl, ERR_FATAL, 19834a8d0ea7SAli Bahrami MSG_INTL(MSG_FIL_INVSHLINK), ifl->ifl_name, 19844a8d0ea7SAli Bahrami EC_WORD(symsecndx), symsecname, EC_XWORD(ndx)); 19857c478bd9Sstevel@tonic-gate return (S_ERROR); 19867c478bd9Sstevel@tonic-gate } 19877c478bd9Sstevel@tonic-gate strsize = ifl->ifl_isdesc[ndx]->is_shdr->sh_size; 19887c478bd9Sstevel@tonic-gate strs = ifl->ifl_isdesc[ndx]->is_indata->d_buf; 19897c478bd9Sstevel@tonic-gate if (ifl->ifl_isdesc[ndx]->is_name) 19907c478bd9Sstevel@tonic-gate strsecname = ifl->ifl_isdesc[ndx]->is_name; 19917c478bd9Sstevel@tonic-gate else 19927c478bd9Sstevel@tonic-gate strsecname = MSG_ORIG(MSG_STR_EMPTY); 19937c478bd9Sstevel@tonic-gate } else { 19947c478bd9Sstevel@tonic-gate /* 19957c478bd9Sstevel@tonic-gate * There is no string table section in this input file 19967c478bd9Sstevel@tonic-gate * although there are symbols in this symbol table section. 19977c478bd9Sstevel@tonic-gate * This means that these symbols do not have names. 19987c478bd9Sstevel@tonic-gate * Currently, only scratch register symbols are allowed 19997c478bd9Sstevel@tonic-gate * not to have names. 20007c478bd9Sstevel@tonic-gate */ 20017c478bd9Sstevel@tonic-gate strsize = 0; 20027c478bd9Sstevel@tonic-gate strs = (char *)MSG_ORIG(MSG_STR_EMPTY); 20037c478bd9Sstevel@tonic-gate strsecname = MSG_ORIG(MSG_STR_EMPTY); 20047c478bd9Sstevel@tonic-gate } 20057c478bd9Sstevel@tonic-gate 20067c478bd9Sstevel@tonic-gate /* 20077c478bd9Sstevel@tonic-gate * Determine the number of local symbols together with the total 20087c478bd9Sstevel@tonic-gate * number we have to process. 20097c478bd9Sstevel@tonic-gate */ 20107c478bd9Sstevel@tonic-gate total = (Word)(shdr->sh_size / shdr->sh_entsize); 20117c478bd9Sstevel@tonic-gate local = shdr->sh_info; 20127c478bd9Sstevel@tonic-gate 20137c478bd9Sstevel@tonic-gate /* 20147c478bd9Sstevel@tonic-gate * Allocate a symbol table index array and a local symbol array 20157c478bd9Sstevel@tonic-gate * (global symbols are processed and added to the ofl->ofl_symbkt[] 20167c478bd9Sstevel@tonic-gate * array). If we are dealing with a relocatable object, allocate the 20177c478bd9Sstevel@tonic-gate * local symbol descriptors. If this isn't a relocatable object we 20187c478bd9Sstevel@tonic-gate * still have to process any shared object locals to determine if any 20197c478bd9Sstevel@tonic-gate * register symbols exist. Although these aren't added to the output 20207c478bd9Sstevel@tonic-gate * image, they are used as part of symbol resolution. 20217c478bd9Sstevel@tonic-gate */ 20227c478bd9Sstevel@tonic-gate if ((ifl->ifl_oldndx = libld_malloc((size_t)(total * 20236b3ba5bdSAli Bahrami sizeof (Sym_desc *)))) == NULL) 20247c478bd9Sstevel@tonic-gate return (S_ERROR); 2025d579eb63Sab etype_rel = (etype == ET_REL); 202675e45495Sab if (etype_rel && local) { 20277c478bd9Sstevel@tonic-gate if ((ifl->ifl_locs = 20286b3ba5bdSAli Bahrami libld_calloc(sizeof (Sym_desc), local)) == NULL) 20297c478bd9Sstevel@tonic-gate return (S_ERROR); 20307c478bd9Sstevel@tonic-gate /* LINTED */ 20317c478bd9Sstevel@tonic-gate ifl->ifl_locscnt = (Word)local; 20327c478bd9Sstevel@tonic-gate } 20337c478bd9Sstevel@tonic-gate ifl->ifl_symscnt = total; 20347c478bd9Sstevel@tonic-gate 20357c478bd9Sstevel@tonic-gate /* 20367c478bd9Sstevel@tonic-gate * If there are local symbols to save add them to the symbol table 20377c478bd9Sstevel@tonic-gate * index array. 20387c478bd9Sstevel@tonic-gate */ 20397c478bd9Sstevel@tonic-gate if (local) { 204024b9abbaSab int allow_ldynsym = OFL_ALLOW_LDYNSYM(ofl); 204124b9abbaSab Sym_desc *last_file_sdp = NULL; 204224b9abbaSab int last_file_ndx = 0; 204324b9abbaSab 20447c478bd9Sstevel@tonic-gate for (sym++, ndx = 1; ndx < local; sym++, ndx++) { 2045635216b6SRod Evans sd_flag_t sdflags = FLG_SY_CLEAN; 2046635216b6SRod Evans Word shndx; 20477c478bd9Sstevel@tonic-gate const char *name; 20487c478bd9Sstevel@tonic-gate Sym_desc *rsdp; 2049ba2be530Sab int shndx_bad = 0; 20501da7e599SAli Bahrami int symtab_enter = 1; 20517c478bd9Sstevel@tonic-gate 20527c478bd9Sstevel@tonic-gate /* 2053ba2be530Sab * Determine and validate the associated section index. 20547c478bd9Sstevel@tonic-gate */ 2055ba2be530Sab if (symshndx && (sym->st_shndx == SHN_XINDEX)) { 20567c478bd9Sstevel@tonic-gate shndx = symshndx[ndx]; 2057ba2be530Sab } else if ((shndx = sym->st_shndx) >= SHN_LORESERVE) { 20587c478bd9Sstevel@tonic-gate sdflags |= FLG_SY_SPECSEC; 20598878595fSRichard Lowe } else if (shndx > ifl->ifl_shnum) { 2060ba2be530Sab /* We need the name before we can issue error */ 2061ba2be530Sab shndx_bad = 1; 2062ba2be530Sab } 20637c478bd9Sstevel@tonic-gate 20647c478bd9Sstevel@tonic-gate /* 20657c478bd9Sstevel@tonic-gate * Check if st_name has a valid value or not. 20667c478bd9Sstevel@tonic-gate */ 20675aefb655Srie if ((name = string(ofl, ifl, sym, strs, strsize, ndx, 20684a8d0ea7SAli Bahrami shndx, symsecndx, symsecname, strsecname, 20691007fd6fSAli Bahrami &sdflags)) == NULL) 20707c478bd9Sstevel@tonic-gate continue; 20717c478bd9Sstevel@tonic-gate 2072ba2be530Sab /* 2073ba2be530Sab * Now that we have the name, if the section index 2074ba2be530Sab * was bad, report it. 2075ba2be530Sab */ 2076ba2be530Sab if (shndx_bad) { 20771007fd6fSAli Bahrami ld_eprintf(ofl, ERR_WARNING, 2078ba2be530Sab MSG_INTL(MSG_SYM_INVSHNDX), 20794a8d0ea7SAli Bahrami demangle_symname(name, symsecname, ndx), 2080ba2be530Sab ifl->ifl_name, 20814f680cc6SAli Bahrami conv_sym_shndx(osabi, mach, sym->st_shndx, 20824f680cc6SAli Bahrami CONV_FMT_DECIMAL, &inv_buf)); 2083ba2be530Sab continue; 2084ba2be530Sab } 2085ba2be530Sab 20867c478bd9Sstevel@tonic-gate /* 20877c478bd9Sstevel@tonic-gate * If this local symbol table originates from a shared 20887c478bd9Sstevel@tonic-gate * object, then we're only interested in recording 20897c478bd9Sstevel@tonic-gate * register symbols. As local symbol descriptors aren't 20907c478bd9Sstevel@tonic-gate * allocated for shared objects, one will be allocated 20917c478bd9Sstevel@tonic-gate * to associated with the register symbol. This symbol 20927c478bd9Sstevel@tonic-gate * won't become part of the output image, but we must 20937c478bd9Sstevel@tonic-gate * process it to test for register conflicts. 20947c478bd9Sstevel@tonic-gate */ 209528bda19cSRod Evans rsdp = sdp = NULL; 20967c478bd9Sstevel@tonic-gate if (sdflags & FLG_SY_REGSYM) { 2097ba2be530Sab /* 2098ba2be530Sab * The presence of FLG_SY_REGSYM means that 2099ba2be530Sab * the pointers in ld_targ.t_ms are non-NULL. 2100ba2be530Sab */ 2101ba2be530Sab rsdp = (*ld_targ.t_ms.ms_reg_find)(sym, ofl); 2102ba2be530Sab if (rsdp != 0) { 21037c478bd9Sstevel@tonic-gate /* 21047c478bd9Sstevel@tonic-gate * The fact that another register def- 21057c478bd9Sstevel@tonic-gate * inition has been found is fatal. 21067c478bd9Sstevel@tonic-gate * Call the verification routine to get 21077c478bd9Sstevel@tonic-gate * the error message and move on. 21087c478bd9Sstevel@tonic-gate */ 2109ba2be530Sab (void) (*ld_targ.t_ms.ms_reg_check) 2110ba2be530Sab (rsdp, sym, name, ifl, ofl); 21117c478bd9Sstevel@tonic-gate continue; 21127c478bd9Sstevel@tonic-gate } 21137c478bd9Sstevel@tonic-gate 21147c478bd9Sstevel@tonic-gate if (etype == ET_DYN) { 21157c478bd9Sstevel@tonic-gate if ((sdp = libld_calloc( 21166b3ba5bdSAli Bahrami sizeof (Sym_desc), 1)) == NULL) 21177c478bd9Sstevel@tonic-gate return (S_ERROR); 21187c478bd9Sstevel@tonic-gate sdp->sd_ref = REF_DYN_SEEN; 2119ca4eed8bSAli Bahrami 2120ca4eed8bSAli Bahrami /* Will not appear in output object */ 21211da7e599SAli Bahrami symtab_enter = 0; 21227c478bd9Sstevel@tonic-gate } 21237c478bd9Sstevel@tonic-gate } else if (etype == ET_DYN) 21247c478bd9Sstevel@tonic-gate continue; 21257c478bd9Sstevel@tonic-gate 21267c478bd9Sstevel@tonic-gate /* 21277c478bd9Sstevel@tonic-gate * Fill in the remaining symbol descriptor information. 21287c478bd9Sstevel@tonic-gate */ 21296b3ba5bdSAli Bahrami if (sdp == NULL) { 21307c478bd9Sstevel@tonic-gate sdp = &(ifl->ifl_locs[ndx]); 21317c478bd9Sstevel@tonic-gate sdp->sd_ref = REF_REL_NEED; 2132635216b6SRod Evans sdp->sd_symndx = ndx; 21337c478bd9Sstevel@tonic-gate } 21346b3ba5bdSAli Bahrami if (rsdp == NULL) { 21357c478bd9Sstevel@tonic-gate sdp->sd_name = name; 21367c478bd9Sstevel@tonic-gate sdp->sd_sym = sym; 21377c478bd9Sstevel@tonic-gate sdp->sd_shndx = shndx; 21387c478bd9Sstevel@tonic-gate sdp->sd_flags = sdflags; 21397c478bd9Sstevel@tonic-gate sdp->sd_file = ifl; 21407c478bd9Sstevel@tonic-gate ifl->ifl_oldndx[ndx] = sdp; 21417c478bd9Sstevel@tonic-gate } 21427c478bd9Sstevel@tonic-gate 21435aefb655Srie DBG_CALL(Dbg_syms_entry(ofl->ofl_lml, ndx, sdp)); 21447c478bd9Sstevel@tonic-gate 21457c478bd9Sstevel@tonic-gate /* 21467c478bd9Sstevel@tonic-gate * Reclassify any SHN_SUNW_IGNORE symbols to SHN_UNDEF 21477c478bd9Sstevel@tonic-gate * so as to simplify future processing. 21487c478bd9Sstevel@tonic-gate */ 21490bc07c75Srie if (sym->st_shndx == SHN_SUNW_IGNORE) { 21507c478bd9Sstevel@tonic-gate sdp->sd_shndx = shndx = SHN_UNDEF; 2151635216b6SRod Evans sdp->sd_flags |= (FLG_SY_IGNORE | FLG_SY_ELIM); 21527c478bd9Sstevel@tonic-gate } 21537c478bd9Sstevel@tonic-gate 21547c478bd9Sstevel@tonic-gate /* 21557c478bd9Sstevel@tonic-gate * Process any register symbols. 21567c478bd9Sstevel@tonic-gate */ 21577c478bd9Sstevel@tonic-gate if (sdp->sd_flags & FLG_SY_REGSYM) { 21587c478bd9Sstevel@tonic-gate /* 21597c478bd9Sstevel@tonic-gate * Add a diagnostic to indicate we've caught a 21607c478bd9Sstevel@tonic-gate * register symbol, as this can be useful if a 21617c478bd9Sstevel@tonic-gate * register conflict is later discovered. 21627c478bd9Sstevel@tonic-gate */ 21635aefb655Srie DBG_CALL(Dbg_syms_entered(ofl, sym, sdp)); 21647c478bd9Sstevel@tonic-gate 21657c478bd9Sstevel@tonic-gate /* 21667c478bd9Sstevel@tonic-gate * If this register symbol hasn't already been 21677c478bd9Sstevel@tonic-gate * recorded, enter it now. 2168ba2be530Sab * 2169ba2be530Sab * The presence of FLG_SY_REGSYM means that 2170ba2be530Sab * the pointers in ld_targ.t_ms are non-NULL. 21717c478bd9Sstevel@tonic-gate */ 21726b3ba5bdSAli Bahrami if ((rsdp == NULL) && 2173ba2be530Sab ((*ld_targ.t_ms.ms_reg_enter)(sdp, ofl) == 2174ba2be530Sab 0)) 21757c478bd9Sstevel@tonic-gate return (S_ERROR); 21767c478bd9Sstevel@tonic-gate } 21777c478bd9Sstevel@tonic-gate 21787c478bd9Sstevel@tonic-gate /* 21797c478bd9Sstevel@tonic-gate * Assign an input section. 21807c478bd9Sstevel@tonic-gate */ 21810bc07c75Srie if ((sym->st_shndx != SHN_UNDEF) && 21827c478bd9Sstevel@tonic-gate ((sdp->sd_flags & FLG_SY_SPECSEC) == 0)) 21837c478bd9Sstevel@tonic-gate sdp->sd_isc = ifl->ifl_isdesc[shndx]; 21847c478bd9Sstevel@tonic-gate 21857c478bd9Sstevel@tonic-gate /* 21867c478bd9Sstevel@tonic-gate * If this symbol falls within the range of a section 21877c478bd9Sstevel@tonic-gate * being discarded, then discard the symbol itself. 21887c478bd9Sstevel@tonic-gate * There is no reason to keep this local symbol. 21897c478bd9Sstevel@tonic-gate */ 21907c478bd9Sstevel@tonic-gate if (sdp->sd_isc && 21917c478bd9Sstevel@tonic-gate (sdp->sd_isc->is_flags & FLG_IS_DISCARD)) { 21927c478bd9Sstevel@tonic-gate sdp->sd_flags |= FLG_SY_ISDISC; 2193a194faf8Srie DBG_CALL(Dbg_syms_discarded(ofl->ofl_lml, sdp)); 21947c478bd9Sstevel@tonic-gate continue; 21957c478bd9Sstevel@tonic-gate } 21967c478bd9Sstevel@tonic-gate 21977c478bd9Sstevel@tonic-gate /* 21987c478bd9Sstevel@tonic-gate * Skip any section symbols as new versions of these 21997c478bd9Sstevel@tonic-gate * will be created. 22007c478bd9Sstevel@tonic-gate */ 22017c478bd9Sstevel@tonic-gate if ((type = ELF_ST_TYPE(sym->st_info)) == STT_SECTION) { 22020bc07c75Srie if (sym->st_shndx == SHN_UNDEF) { 22031007fd6fSAli Bahrami ld_eprintf(ofl, ERR_WARNING, 22047c478bd9Sstevel@tonic-gate MSG_INTL(MSG_SYM_INVSHNDX), 22054a8d0ea7SAli Bahrami demangle_symname(name, symsecname, 2206ba2be530Sab ndx), ifl->ifl_name, 22074f680cc6SAli Bahrami conv_sym_shndx(osabi, mach, 22084f680cc6SAli Bahrami sym->st_shndx, CONV_FMT_DECIMAL, 2209de777a60Sab &inv_buf)); 22107c478bd9Sstevel@tonic-gate } 22117c478bd9Sstevel@tonic-gate continue; 22127c478bd9Sstevel@tonic-gate } 22137c478bd9Sstevel@tonic-gate 221475e45495Sab /* 221575e45495Sab * For a relocatable object, if this symbol is defined 221675e45495Sab * and has non-zero length and references an address 221775e45495Sab * within an associated section, then check its extents 221875e45495Sab * to make sure the section boundaries encompass it. 221975e45495Sab * If they don't, the ELF file is corrupt. 222075e45495Sab */ 222124b9abbaSab if (etype_rel) { 222224b9abbaSab if (SYM_LOC_BADADDR(sdp, sym, type)) { 222324b9abbaSab issue_badaddr_msg(ifl, ofl, sdp, 222424b9abbaSab sym, shndx); 2225ca4eed8bSAli Bahrami if (ofl->ofl_flags & FLG_OF_FATAL) 2226ca4eed8bSAli Bahrami continue; 222724b9abbaSab } 222824b9abbaSab 222924b9abbaSab /* 223024b9abbaSab * We have observed relocatable objects 223124b9abbaSab * containing identical adjacent STT_FILE 223224b9abbaSab * symbols. Discard any other than the first, 223324b9abbaSab * as they are all equivalent and the extras 223424b9abbaSab * do not add information. 223524b9abbaSab * 223624b9abbaSab * For the purpose of this test, we assume 223724b9abbaSab * that only the symbol type and the string 223824b9abbaSab * table offset (st_name) matter. 223924b9abbaSab */ 224024b9abbaSab if (type == STT_FILE) { 224124b9abbaSab int toss = (last_file_sdp != NULL) && 224224b9abbaSab ((ndx - 1) == last_file_ndx) && 224324b9abbaSab (sym->st_name == 224424b9abbaSab last_file_sdp->sd_sym->st_name); 224524b9abbaSab 224624b9abbaSab last_file_sdp = sdp; 224724b9abbaSab last_file_ndx = ndx; 224824b9abbaSab if (toss) { 224924b9abbaSab sdp->sd_flags |= FLG_SY_INVALID; 225024b9abbaSab DBG_CALL(Dbg_syms_dup_discarded( 225124b9abbaSab ofl->ofl_lml, ndx, sdp)); 225224b9abbaSab continue; 225324b9abbaSab } 225424b9abbaSab } 225575e45495Sab } 225675e45495Sab 225724b9abbaSab 22587c478bd9Sstevel@tonic-gate /* 22597c478bd9Sstevel@tonic-gate * Sanity check for TLS 22607c478bd9Sstevel@tonic-gate */ 22610bc07c75Srie if ((sym->st_size != 0) && ((type == STT_TLS) && 22620bc07c75Srie (sym->st_shndx != SHN_COMMON))) { 22637c478bd9Sstevel@tonic-gate Is_desc *isp = sdp->sd_isc; 22647c478bd9Sstevel@tonic-gate 22656b3ba5bdSAli Bahrami if ((isp == NULL) || (isp->is_shdr == NULL) || 22667c478bd9Sstevel@tonic-gate ((isp->is_shdr->sh_flags & SHF_TLS) == 0)) { 22671007fd6fSAli Bahrami ld_eprintf(ofl, ERR_FATAL, 22687c478bd9Sstevel@tonic-gate MSG_INTL(MSG_SYM_TLS), 22697c478bd9Sstevel@tonic-gate demangle(sdp->sd_name), 22707c478bd9Sstevel@tonic-gate ifl->ifl_name); 22717c478bd9Sstevel@tonic-gate continue; 22727c478bd9Sstevel@tonic-gate } 22737c478bd9Sstevel@tonic-gate } 22747c478bd9Sstevel@tonic-gate 22757c478bd9Sstevel@tonic-gate /* 22767c478bd9Sstevel@tonic-gate * Carry our some basic sanity checks (these are just 22777c478bd9Sstevel@tonic-gate * some of the erroneous symbol entries we've come 22787c478bd9Sstevel@tonic-gate * across, there's probably a lot more). The symbol 22797c478bd9Sstevel@tonic-gate * will not be carried forward to the output file, which 22807c478bd9Sstevel@tonic-gate * won't be a problem unless a relocation is required 22817c478bd9Sstevel@tonic-gate * against it. 22827c478bd9Sstevel@tonic-gate */ 22837c478bd9Sstevel@tonic-gate if (((sdp->sd_flags & FLG_SY_SPECSEC) && 22840bc07c75Srie ((sym->st_shndx == SHN_COMMON)) || 22850bc07c75Srie ((type == STT_FILE) && 22860bc07c75Srie (sym->st_shndx != SHN_ABS))) || 22876b3ba5bdSAli Bahrami (sdp->sd_isc && (sdp->sd_isc->is_osdesc == NULL))) { 22881007fd6fSAli Bahrami ld_eprintf(ofl, ERR_WARNING, 22895aefb655Srie MSG_INTL(MSG_SYM_INVSHNDX), 22904a8d0ea7SAli Bahrami demangle_symname(name, symsecname, ndx), 2291ba2be530Sab ifl->ifl_name, 22924f680cc6SAli Bahrami conv_sym_shndx(osabi, mach, sym->st_shndx, 22934f680cc6SAli Bahrami CONV_FMT_DECIMAL, &inv_buf)); 22947c478bd9Sstevel@tonic-gate sdp->sd_isc = NULL; 22957c478bd9Sstevel@tonic-gate sdp->sd_flags |= FLG_SY_INVALID; 22967c478bd9Sstevel@tonic-gate continue; 22977c478bd9Sstevel@tonic-gate } 22987c478bd9Sstevel@tonic-gate 22997c478bd9Sstevel@tonic-gate /* 23007c478bd9Sstevel@tonic-gate * As these local symbols will become part of the output 23017c478bd9Sstevel@tonic-gate * image, record their number and name string size. 23027c478bd9Sstevel@tonic-gate * Globals are counted after all input file processing 23037c478bd9Sstevel@tonic-gate * (and hence symbol resolution) is complete during 23047c478bd9Sstevel@tonic-gate * sym_validate(). 23057c478bd9Sstevel@tonic-gate */ 23061da7e599SAli Bahrami if (!(ofl->ofl_flags & FLG_OF_REDLSYM) && 23071da7e599SAli Bahrami symtab_enter) { 23087c478bd9Sstevel@tonic-gate ofl->ofl_locscnt++; 23097c478bd9Sstevel@tonic-gate 23107c478bd9Sstevel@tonic-gate if ((((sdp->sd_flags & FLG_SY_REGSYM) == 0) || 23117c478bd9Sstevel@tonic-gate sym->st_name) && (st_insert(ofl->ofl_strtab, 23127c478bd9Sstevel@tonic-gate sdp->sd_name) == -1)) 23137c478bd9Sstevel@tonic-gate return (S_ERROR); 23149039eeafSab 23159039eeafSab if (allow_ldynsym && sym->st_name && 2316d579eb63Sab ldynsym_symtype[type]) { 23179039eeafSab ofl->ofl_dynlocscnt++; 23189039eeafSab if (st_insert(ofl->ofl_dynstrtab, 23199039eeafSab sdp->sd_name) == -1) 23209039eeafSab return (S_ERROR); 2321d579eb63Sab /* Include it in sort section? */ 2322d579eb63Sab DYNSORT_COUNT(sdp, sym, type, ++); 23239039eeafSab } 23247c478bd9Sstevel@tonic-gate } 23257c478bd9Sstevel@tonic-gate } 23267c478bd9Sstevel@tonic-gate } 23277c478bd9Sstevel@tonic-gate 2328d840867fSab /* 2329d840867fSab * The GNU ld interprets the top bit of the 16-bit Versym value 2330d840867fSab * (0x8000) as the "hidden" bit. If this bit is set, the linker 2331d840867fSab * is supposed to act as if that symbol does not exist. The Solaris 2332d840867fSab * linker does not support this mechanism, or the model of interface 2333d840867fSab * evolution that it allows, but we honor it in GNU ld produced 2334d840867fSab * objects in order to interoperate with them. 2335d840867fSab * 2336d840867fSab * Determine if we should honor the GNU hidden bit for this file. 2337d840867fSab */ 2338d840867fSab test_gnu_hidden_bit = ((ifl->ifl_flags & FLG_IF_GNUVER) != 0) && 2339d840867fSab (ifl->ifl_versym != NULL); 2340d840867fSab 234108278a5eSRod Evans /* 234208278a5eSRod Evans * Determine whether object capabilities for this file are being 234308278a5eSRod Evans * converted into symbol capabilities. If so, global function symbols, 234408278a5eSRod Evans * and initialized global data symbols, need special translation and 234508278a5eSRod Evans * processing. 234608278a5eSRod Evans */ 234708278a5eSRod Evans if ((etype == ET_REL) && (ifl->ifl_flags & FLG_IF_OTOSCAP)) 234808278a5eSRod Evans cdp = ifl->ifl_caps; 234908278a5eSRod Evans 23507c478bd9Sstevel@tonic-gate /* 23517c478bd9Sstevel@tonic-gate * Now scan the global symbols entering them in the internal symbol 23527c478bd9Sstevel@tonic-gate * table or resolving them as necessary. 23537c478bd9Sstevel@tonic-gate */ 23547c478bd9Sstevel@tonic-gate sym = (Sym *)isc->is_indata->d_buf; 23557c478bd9Sstevel@tonic-gate sym += local; 23566b3ba5bdSAli Bahrami weak = 0; 23577c478bd9Sstevel@tonic-gate /* LINTED */ 23587c478bd9Sstevel@tonic-gate for (ndx = (int)local; ndx < total; sym++, ndx++) { 23597c478bd9Sstevel@tonic-gate const char *name; 2360635216b6SRod Evans sd_flag_t sdflags = 0; 2361635216b6SRod Evans Word shndx; 2362ba2be530Sab int shndx_bad = 0; 2363635216b6SRod Evans Sym *nsym = sym; 236408278a5eSRod Evans Cap_pair *cpp = NULL; 236508278a5eSRod Evans uchar_t ntype; 23667c478bd9Sstevel@tonic-gate 23677c478bd9Sstevel@tonic-gate /* 2368ba2be530Sab * Determine and validate the associated section index. 23697c478bd9Sstevel@tonic-gate */ 2370635216b6SRod Evans if (symshndx && (nsym->st_shndx == SHN_XINDEX)) { 23717c478bd9Sstevel@tonic-gate shndx = symshndx[ndx]; 2372635216b6SRod Evans } else if ((shndx = nsym->st_shndx) >= SHN_LORESERVE) { 2373ba2be530Sab sdflags |= FLG_SY_SPECSEC; 23748878595fSRichard Lowe } else if (shndx > ifl->ifl_shnum) { 2375ba2be530Sab /* We need the name before we can issue error */ 2376ba2be530Sab shndx_bad = 1; 23777c478bd9Sstevel@tonic-gate } 23787c478bd9Sstevel@tonic-gate 23797c478bd9Sstevel@tonic-gate /* 23807c478bd9Sstevel@tonic-gate * Check if st_name has a valid value or not. 23817c478bd9Sstevel@tonic-gate */ 2382635216b6SRod Evans if ((name = string(ofl, ifl, nsym, strs, strsize, ndx, shndx, 23831007fd6fSAli Bahrami symsecndx, symsecname, strsecname, &sdflags)) == NULL) 23847c478bd9Sstevel@tonic-gate continue; 23857c478bd9Sstevel@tonic-gate 2386ba2be530Sab /* 238708278a5eSRod Evans * Now that we have the name, report an erroneous section index. 2388ba2be530Sab */ 2389ba2be530Sab if (shndx_bad) { 23901007fd6fSAli Bahrami ld_eprintf(ofl, ERR_WARNING, MSG_INTL(MSG_SYM_INVSHNDX), 23914a8d0ea7SAli Bahrami demangle_symname(name, symsecname, ndx), 2392ba2be530Sab ifl->ifl_name, 2393635216b6SRod Evans conv_sym_shndx(osabi, mach, nsym->st_shndx, 23944f680cc6SAli Bahrami CONV_FMT_DECIMAL, &inv_buf)); 2395ba2be530Sab continue; 2396ba2be530Sab } 2397ba2be530Sab 23983b41b08bSab /* 2399d840867fSab * Test for the GNU hidden bit, and ignore symbols that 2400d840867fSab * have it set. 24013b41b08bSab */ 2402d840867fSab if (test_gnu_hidden_bit && 2403d840867fSab ((ifl->ifl_versym[ndx] & 0x8000) != 0)) 24043b41b08bSab continue; 24053b41b08bSab 24067c478bd9Sstevel@tonic-gate /* 24077c478bd9Sstevel@tonic-gate * The linker itself will generate symbols for _end, _etext, 24087c478bd9Sstevel@tonic-gate * _edata, _DYNAMIC and _PROCEDURE_LINKAGE_TABLE_, so don't 24097c478bd9Sstevel@tonic-gate * bother entering these symbols from shared objects. This 24107c478bd9Sstevel@tonic-gate * results in some wasted resolution processing, which is hard 24117c478bd9Sstevel@tonic-gate * to feel, but if nothing else, pollutes diagnostic relocation 24127c478bd9Sstevel@tonic-gate * output. 24137c478bd9Sstevel@tonic-gate */ 2414635216b6SRod Evans if (name[0] && (etype == ET_DYN) && (nsym->st_size == 0) && 2415635216b6SRod Evans (ELF_ST_TYPE(nsym->st_info) == STT_OBJECT) && 24167c478bd9Sstevel@tonic-gate (name[0] == '_') && ((name[1] == 'e') || 24177c478bd9Sstevel@tonic-gate (name[1] == 'D') || (name[1] == 'P')) && 24187c478bd9Sstevel@tonic-gate ((strcmp(name, MSG_ORIG(MSG_SYM_ETEXT_U)) == 0) || 24197c478bd9Sstevel@tonic-gate (strcmp(name, MSG_ORIG(MSG_SYM_EDATA_U)) == 0) || 24207c478bd9Sstevel@tonic-gate (strcmp(name, MSG_ORIG(MSG_SYM_END_U)) == 0) || 24217c478bd9Sstevel@tonic-gate (strcmp(name, MSG_ORIG(MSG_SYM_DYNAMIC_U)) == 0) || 24227c478bd9Sstevel@tonic-gate (strcmp(name, MSG_ORIG(MSG_SYM_PLKTBL_U)) == 0))) { 24237c478bd9Sstevel@tonic-gate ifl->ifl_oldndx[ndx] = 0; 24247c478bd9Sstevel@tonic-gate continue; 24257c478bd9Sstevel@tonic-gate } 24267c478bd9Sstevel@tonic-gate 2427cdcc71c0SAli Bahrami /* 2428cdcc71c0SAli Bahrami * The '-z wrap=XXX' option emulates the GNU ld --wrap=XXX 2429cdcc71c0SAli Bahrami * option. When XXX is the symbol to be wrapped: 2430cdcc71c0SAli Bahrami * 243108278a5eSRod Evans * - An undefined reference to XXX is converted to __wrap_XXX 243208278a5eSRod Evans * - An undefined reference to __real_XXX is converted to XXX 2433cdcc71c0SAli Bahrami * 2434cdcc71c0SAli Bahrami * The idea is that the user can supply a wrapper function 2435cdcc71c0SAli Bahrami * __wrap_XXX that does some work, and then uses the name 2436cdcc71c0SAli Bahrami * __real_XXX to pass the call on to the real function. The 2437cdcc71c0SAli Bahrami * wrapper objects are linked with the original unmodified 2438cdcc71c0SAli Bahrami * objects to produce a wrapped version of the output object. 2439cdcc71c0SAli Bahrami */ 2440cdcc71c0SAli Bahrami if (ofl->ofl_wrap && name[0] && (shndx == SHN_UNDEF)) { 2441cdcc71c0SAli Bahrami WrapSymNode wsn, *wsnp; 2442cdcc71c0SAli Bahrami 2443cdcc71c0SAli Bahrami /* 2444cdcc71c0SAli Bahrami * If this is the __real_XXX form, advance the 2445cdcc71c0SAli Bahrami * pointer to reference the wrapped name. 2446cdcc71c0SAli Bahrami */ 2447cdcc71c0SAli Bahrami wsn.wsn_name = name; 2448cdcc71c0SAli Bahrami if ((*name == '_') && 2449cdcc71c0SAli Bahrami (strncmp(name, MSG_ORIG(MSG_STR_UU_REAL_U), 2450cdcc71c0SAli Bahrami MSG_STR_UU_REAL_U_SIZE) == 0)) 2451cdcc71c0SAli Bahrami wsn.wsn_name += MSG_STR_UU_REAL_U_SIZE; 2452cdcc71c0SAli Bahrami 2453cdcc71c0SAli Bahrami /* 2454cdcc71c0SAli Bahrami * Is this symbol in the wrap AVL tree? If so, map 2455cdcc71c0SAli Bahrami * XXX to __wrap_XXX, and __real_XXX to XXX. Note that 2456cdcc71c0SAli Bahrami * wsn.wsn_name will equal the current value of name 2457cdcc71c0SAli Bahrami * if the __real_ prefix is not present. 2458cdcc71c0SAli Bahrami */ 2459cdcc71c0SAli Bahrami if ((wsnp = avl_find(ofl->ofl_wrap, &wsn, 0)) != NULL) { 2460cdcc71c0SAli Bahrami const char *old_name = name; 2461cdcc71c0SAli Bahrami 2462cdcc71c0SAli Bahrami name = (wsn.wsn_name == name) ? 2463cdcc71c0SAli Bahrami wsnp->wsn_wrapname : wsn.wsn_name; 2464cdcc71c0SAli Bahrami DBG_CALL(Dbg_syms_wrap(ofl->ofl_lml, ndx, 2465cdcc71c0SAli Bahrami old_name, name)); 2466cdcc71c0SAli Bahrami } 2467cdcc71c0SAli Bahrami } 2468cdcc71c0SAli Bahrami 24697c478bd9Sstevel@tonic-gate /* 24707c478bd9Sstevel@tonic-gate * Determine and validate the symbols binding. 24717c478bd9Sstevel@tonic-gate */ 2472635216b6SRod Evans bind = ELF_ST_BIND(nsym->st_info); 24737c478bd9Sstevel@tonic-gate if ((bind != STB_GLOBAL) && (bind != STB_WEAK)) { 24741007fd6fSAli Bahrami ld_eprintf(ofl, ERR_WARNING, MSG_INTL(MSG_SYM_NONGLOB), 24754a8d0ea7SAli Bahrami demangle_symname(name, symsecname, ndx), 2476de777a60Sab ifl->ifl_name, 2477de777a60Sab conv_sym_info_bind(bind, 0, &inv_buf)); 24787c478bd9Sstevel@tonic-gate continue; 24797c478bd9Sstevel@tonic-gate } 24806b3ba5bdSAli Bahrami if (bind == STB_WEAK) 24816b3ba5bdSAli Bahrami weak++; 24827c478bd9Sstevel@tonic-gate 24837c478bd9Sstevel@tonic-gate /* 24847c478bd9Sstevel@tonic-gate * If this symbol falls within the range of a section being 24857c478bd9Sstevel@tonic-gate * discarded, then discard the symbol itself. 24867c478bd9Sstevel@tonic-gate */ 24877c478bd9Sstevel@tonic-gate if (((sdflags & FLG_SY_SPECSEC) == 0) && 2488635216b6SRod Evans (nsym->st_shndx != SHN_UNDEF)) { 24897c478bd9Sstevel@tonic-gate Is_desc *isp; 24907c478bd9Sstevel@tonic-gate 24917c478bd9Sstevel@tonic-gate if (shndx >= ifl->ifl_shnum) { 24927c478bd9Sstevel@tonic-gate /* 24937c478bd9Sstevel@tonic-gate * Carry our some basic sanity checks 24947c478bd9Sstevel@tonic-gate * The symbol will not be carried forward to 24957c478bd9Sstevel@tonic-gate * the output file, which won't be a problem 24967c478bd9Sstevel@tonic-gate * unless a relocation is required against it. 24977c478bd9Sstevel@tonic-gate */ 24981007fd6fSAli Bahrami ld_eprintf(ofl, ERR_WARNING, 2499ba2be530Sab MSG_INTL(MSG_SYM_INVSHNDX), 25004a8d0ea7SAli Bahrami demangle_symname(name, symsecname, ndx), 25010bc07c75Srie ifl->ifl_name, 2502635216b6SRod Evans conv_sym_shndx(osabi, mach, nsym->st_shndx, 25034f680cc6SAli Bahrami CONV_FMT_DECIMAL, &inv_buf)); 25047c478bd9Sstevel@tonic-gate continue; 25057c478bd9Sstevel@tonic-gate } 25067c478bd9Sstevel@tonic-gate 25077c478bd9Sstevel@tonic-gate isp = ifl->ifl_isdesc[shndx]; 25087c478bd9Sstevel@tonic-gate if (isp && (isp->is_flags & FLG_IS_DISCARD)) { 25097c478bd9Sstevel@tonic-gate if ((sdp = 25106b3ba5bdSAli Bahrami libld_calloc(sizeof (Sym_desc), 1)) == NULL) 25117c478bd9Sstevel@tonic-gate return (S_ERROR); 25127c478bd9Sstevel@tonic-gate 25137c478bd9Sstevel@tonic-gate /* 25147c478bd9Sstevel@tonic-gate * Create a dummy symbol entry so that if we 25157c478bd9Sstevel@tonic-gate * find any references to this discarded symbol 25167c478bd9Sstevel@tonic-gate * we can compensate. 25177c478bd9Sstevel@tonic-gate */ 25187c478bd9Sstevel@tonic-gate sdp->sd_name = name; 2519635216b6SRod Evans sdp->sd_sym = nsym; 25207c478bd9Sstevel@tonic-gate sdp->sd_file = ifl; 25217c478bd9Sstevel@tonic-gate sdp->sd_isc = isp; 25227c478bd9Sstevel@tonic-gate sdp->sd_flags = FLG_SY_ISDISC; 25237c478bd9Sstevel@tonic-gate ifl->ifl_oldndx[ndx] = sdp; 25247c478bd9Sstevel@tonic-gate 2525a194faf8Srie DBG_CALL(Dbg_syms_discarded(ofl->ofl_lml, sdp)); 25267c478bd9Sstevel@tonic-gate continue; 25277c478bd9Sstevel@tonic-gate } 25287c478bd9Sstevel@tonic-gate } 25297c478bd9Sstevel@tonic-gate 253008278a5eSRod Evans /* 253108278a5eSRod Evans * If object capabilities for this file are being converted 253208278a5eSRod Evans * into symbol capabilities, then: 253308278a5eSRod Evans * 253408278a5eSRod Evans * - Any global function, or initialized global data symbol 253508278a5eSRod Evans * definitions (ie., those that are not associated with 253608278a5eSRod Evans * special symbol types, ie., ABS, COMMON, etc.), and which 253708278a5eSRod Evans * have not been reduced to locals, are converted to symbol 253808278a5eSRod Evans * references (UNDEF). This ensures that any reference to 253908278a5eSRod Evans * the original symbol, for example from a relocation, get 254008278a5eSRod Evans * associated to a capabilities family lead symbol, ie., a 254108278a5eSRod Evans * generic instance. 254208278a5eSRod Evans * 254308278a5eSRod Evans * - For each global function, or object symbol definition, 254408278a5eSRod Evans * a new local symbol is created. The function or object 254508278a5eSRod Evans * is renamed using the capabilities CA_SUNW_ID definition 254608278a5eSRod Evans * (which might have been fabricated for this purpose - 254708278a5eSRod Evans * see get_cap_group()). The new symbol name is: 254808278a5eSRod Evans * 254908278a5eSRod Evans * <original name>%<capability group identifier> 255008278a5eSRod Evans * 255108278a5eSRod Evans * This symbol is associated to the same location, and 255208278a5eSRod Evans * becomes a capabilities family member. 255308278a5eSRod Evans */ 255408278a5eSRod Evans /* LINTED */ 255508278a5eSRod Evans hash = (Word)elf_hash(name); 255608278a5eSRod Evans 255708278a5eSRod Evans ntype = ELF_ST_TYPE(nsym->st_info); 255808278a5eSRod Evans if (cdp && (nsym->st_shndx != SHN_UNDEF) && 255908278a5eSRod Evans ((sdflags & FLG_SY_SPECSEC) == 0) && 256008278a5eSRod Evans ((ntype == STT_FUNC) || (ntype == STT_OBJECT))) { 256108278a5eSRod Evans /* 256208278a5eSRod Evans * Determine this symbol's visibility. If a mapfile has 256308278a5eSRod Evans * indicated this symbol should be local, then there's 256408278a5eSRod Evans * no point in transforming this global symbol to a 256508278a5eSRod Evans * capabilities symbol. Otherwise, create a symbol 256608278a5eSRod Evans * capability pair descriptor to record this symbol as 256708278a5eSRod Evans * a candidate for translation. 256808278a5eSRod Evans */ 256908278a5eSRod Evans if (sym_cap_vis(name, hash, sym, ofl) && 257008278a5eSRod Evans ((cpp = alist_append(&cappairs, NULL, 257108278a5eSRod Evans sizeof (Cap_pair), AL_CNT_CAP_PAIRS)) == NULL)) 257208278a5eSRod Evans return (S_ERROR); 257308278a5eSRod Evans } 257408278a5eSRod Evans 257508278a5eSRod Evans if (cpp) { 257608278a5eSRod Evans Sym *rsym; 257708278a5eSRod Evans 257808278a5eSRod Evans DBG_CALL(Dbg_syms_cap_convert(ofl, ndx, name, nsym)); 257908278a5eSRod Evans 258008278a5eSRod Evans /* 258108278a5eSRod Evans * Allocate a new symbol descriptor to represent the 258208278a5eSRod Evans * transformed global symbol. The descriptor points 258308278a5eSRod Evans * to the original symbol information (which might 258408278a5eSRod Evans * indicate a global or weak visibility). The symbol 258508278a5eSRod Evans * information will be transformed into a local symbol 258608278a5eSRod Evans * later, after any weak aliases are culled. 258708278a5eSRod Evans */ 258808278a5eSRod Evans if ((cpp->c_osdp = 258908278a5eSRod Evans libld_malloc(sizeof (Sym_desc))) == NULL) 259008278a5eSRod Evans return (S_ERROR); 259108278a5eSRod Evans 259208278a5eSRod Evans cpp->c_osdp->sd_name = name; 259308278a5eSRod Evans cpp->c_osdp->sd_sym = nsym; 259408278a5eSRod Evans cpp->c_osdp->sd_shndx = shndx; 259508278a5eSRod Evans cpp->c_osdp->sd_file = ifl; 259608278a5eSRod Evans cpp->c_osdp->sd_isc = ifl->ifl_isdesc[shndx]; 259708278a5eSRod Evans cpp->c_osdp->sd_ref = REF_REL_NEED; 259808278a5eSRod Evans 259908278a5eSRod Evans /* 260008278a5eSRod Evans * Save the capabilities group this symbol belongs to, 260108278a5eSRod Evans * and the original symbol index. 260208278a5eSRod Evans */ 260308278a5eSRod Evans cpp->c_group = cdp->ca_groups->apl_data[0]; 260408278a5eSRod Evans cpp->c_ndx = ndx; 260508278a5eSRod Evans 260608278a5eSRod Evans /* 260708278a5eSRod Evans * Replace the original symbol definition with a symbol 260808278a5eSRod Evans * reference. Make sure this reference isn't left as a 260908278a5eSRod Evans * weak. 261008278a5eSRod Evans */ 261108278a5eSRod Evans if ((rsym = libld_malloc(sizeof (Sym))) == NULL) 261208278a5eSRod Evans return (S_ERROR); 261308278a5eSRod Evans 261408278a5eSRod Evans *rsym = *nsym; 261508278a5eSRod Evans 261608278a5eSRod Evans rsym->st_info = ELF_ST_INFO(STB_GLOBAL, ntype); 261708278a5eSRod Evans rsym->st_shndx = shndx = SHN_UNDEF; 261808278a5eSRod Evans rsym->st_value = 0; 261908278a5eSRod Evans rsym->st_size = 0; 262008278a5eSRod Evans 262108278a5eSRod Evans sdflags |= FLG_SY_CAP; 262208278a5eSRod Evans 262308278a5eSRod Evans nsym = rsym; 262408278a5eSRod Evans } 262508278a5eSRod Evans 26267c478bd9Sstevel@tonic-gate /* 26277c478bd9Sstevel@tonic-gate * If the symbol does not already exist in the internal symbol 26287c478bd9Sstevel@tonic-gate * table add it, otherwise resolve the conflict. If the symbol 26297c478bd9Sstevel@tonic-gate * from this file is kept, retain its symbol table index for 26307c478bd9Sstevel@tonic-gate * possible use in associating a global alias. 26317c478bd9Sstevel@tonic-gate */ 26325aefb655Srie if ((sdp = ld_sym_find(name, hash, &where, ofl)) == NULL) { 26335aefb655Srie DBG_CALL(Dbg_syms_global(ofl->ofl_lml, ndx, name)); 2634635216b6SRod Evans if ((sdp = ld_sym_enter(name, nsym, hash, ifl, ofl, ndx, 2635635216b6SRod Evans shndx, sdflags, &where)) == (Sym_desc *)S_ERROR) 26367c478bd9Sstevel@tonic-gate return (S_ERROR); 26377c478bd9Sstevel@tonic-gate 2638635216b6SRod Evans } else if (ld_sym_resolve(sdp, nsym, ifl, ofl, ndx, shndx, 26397c478bd9Sstevel@tonic-gate sdflags) == S_ERROR) 26407c478bd9Sstevel@tonic-gate return (S_ERROR); 26417c478bd9Sstevel@tonic-gate 264208278a5eSRod Evans /* 264308278a5eSRod Evans * Now that we have a symbol descriptor, retain the descriptor 264408278a5eSRod Evans * for later use by symbol capabilities processing. 264508278a5eSRod Evans */ 264608278a5eSRod Evans if (cpp) 264708278a5eSRod Evans cpp->c_nsdp = sdp; 264808278a5eSRod Evans 26497c478bd9Sstevel@tonic-gate /* 26507c478bd9Sstevel@tonic-gate * After we've compared a defined symbol in one shared 26517c478bd9Sstevel@tonic-gate * object, flag the symbol so we don't compare it again. 26527c478bd9Sstevel@tonic-gate */ 2653635216b6SRod Evans if ((etype == ET_DYN) && (nsym->st_shndx != SHN_UNDEF) && 26547c478bd9Sstevel@tonic-gate ((sdp->sd_flags & FLG_SY_SOFOUND) == 0)) 26557c478bd9Sstevel@tonic-gate sdp->sd_flags |= FLG_SY_SOFOUND; 26567c478bd9Sstevel@tonic-gate 26577c478bd9Sstevel@tonic-gate /* 26587c478bd9Sstevel@tonic-gate * If the symbol is accepted from this file retain the symbol 26597c478bd9Sstevel@tonic-gate * index for possible use in aliasing. 26607c478bd9Sstevel@tonic-gate */ 26617c478bd9Sstevel@tonic-gate if (sdp->sd_file == ifl) 26627c478bd9Sstevel@tonic-gate sdp->sd_symndx = ndx; 26637c478bd9Sstevel@tonic-gate 26647c478bd9Sstevel@tonic-gate ifl->ifl_oldndx[ndx] = sdp; 26657c478bd9Sstevel@tonic-gate 26667c478bd9Sstevel@tonic-gate /* 26677c478bd9Sstevel@tonic-gate * If we've accepted a register symbol, continue to validate 26687c478bd9Sstevel@tonic-gate * it. 26697c478bd9Sstevel@tonic-gate */ 26707c478bd9Sstevel@tonic-gate if (sdp->sd_flags & FLG_SY_REGSYM) { 26717c478bd9Sstevel@tonic-gate Sym_desc *rsdp; 26727c478bd9Sstevel@tonic-gate 2673ba2be530Sab /* 2674ba2be530Sab * The presence of FLG_SY_REGSYM means that 2675ba2be530Sab * the pointers in ld_targ.t_ms are non-NULL. 2676ba2be530Sab */ 2677ba2be530Sab rsdp = (*ld_targ.t_ms.ms_reg_find)(sdp->sd_sym, ofl); 26786b3ba5bdSAli Bahrami if (rsdp == NULL) { 2679ba2be530Sab if ((*ld_targ.t_ms.ms_reg_enter)(sdp, ofl) == 0) 26807c478bd9Sstevel@tonic-gate return (S_ERROR); 26817c478bd9Sstevel@tonic-gate } else if (rsdp != sdp) { 2682ba2be530Sab (void) (*ld_targ.t_ms.ms_reg_check)(rsdp, 2683ba2be530Sab sdp->sd_sym, sdp->sd_name, ifl, ofl); 26847c478bd9Sstevel@tonic-gate } 26857c478bd9Sstevel@tonic-gate } 268675e45495Sab 268775e45495Sab /* 268875e45495Sab * For a relocatable object, if this symbol is defined 268975e45495Sab * and has non-zero length and references an address 269075e45495Sab * within an associated section, then check its extents 269175e45495Sab * to make sure the section boundaries encompass it. 269275e45495Sab * If they don't, the ELF file is corrupt. Note that this 269375e45495Sab * global symbol may have come from another file to satisfy 269475e45495Sab * an UNDEF symbol of the same name from this one. In that 269575e45495Sab * case, we don't check it, because it was already checked 269675e45495Sab * as part of its own file. 269775e45495Sab */ 269875e45495Sab if (etype_rel && (sdp->sd_file == ifl)) { 269975e45495Sab Sym *tsym = sdp->sd_sym; 270075e45495Sab 270175e45495Sab if (SYM_LOC_BADADDR(sdp, tsym, 270275e45495Sab ELF_ST_TYPE(tsym->st_info))) { 270369a0bf0cSab issue_badaddr_msg(ifl, ofl, sdp, 270469a0bf0cSab tsym, tsym->st_shndx); 270575e45495Sab continue; 270675e45495Sab } 270775e45495Sab } 27087c478bd9Sstevel@tonic-gate } 2709dc0f59e5SAli Bahrami DBG_CALL(Dbg_util_nl(ofl->ofl_lml, DBG_NL_STD)); 27107c478bd9Sstevel@tonic-gate 27117c478bd9Sstevel@tonic-gate /* 27126b3ba5bdSAli Bahrami * Associate weak (alias) symbols to their non-weak counterparts by 271308278a5eSRod Evans * scanning the global symbols one more time. 27146b3ba5bdSAli Bahrami * 27156b3ba5bdSAli Bahrami * This association is needed when processing the symbols from a shared 27166b3ba5bdSAli Bahrami * object dependency when a a weak definition satisfies a reference: 27177c478bd9Sstevel@tonic-gate * 27186b3ba5bdSAli Bahrami * - When building a dynamic executable, if a referenced symbol is a 27196b3ba5bdSAli Bahrami * data item, the symbol data is copied to the executables address 27206b3ba5bdSAli Bahrami * space. In this copy-relocation case, we must also reassociate 27216b3ba5bdSAli Bahrami * the alias symbol with its new location in the executable. 27227c478bd9Sstevel@tonic-gate * 27236b3ba5bdSAli Bahrami * - If the referenced symbol is a function then we may need to 27246b3ba5bdSAli Bahrami * promote the symbols binding from undefined weak to undefined, 27256b3ba5bdSAli Bahrami * otherwise the run-time linker will not generate the correct 27266b3ba5bdSAli Bahrami * relocation error should the symbol not be found. 27276b3ba5bdSAli Bahrami * 27286b3ba5bdSAli Bahrami * Weak alias association is also required when a local dynsym table 27296b3ba5bdSAli Bahrami * is being created. This table should only contain one instance of a 27306b3ba5bdSAli Bahrami * symbol that is associated to a given address. 27317c478bd9Sstevel@tonic-gate * 27327c478bd9Sstevel@tonic-gate * The true association between a weak/strong symbol pair is that both 27336b3ba5bdSAli Bahrami * symbol entries are identical, thus first we create a sorted symbol 27346b3ba5bdSAli Bahrami * list keyed off of the symbols section index and value. If the symbol 27356b3ba5bdSAli Bahrami * belongs to the same section and has the same value, then the chances 27366b3ba5bdSAli Bahrami * are that the rest of the symbols data is the same. This list is then 27376b3ba5bdSAli Bahrami * scanned for weak symbols, and if one is found then any strong 27386b3ba5bdSAli Bahrami * association will exist in the entries that follow. Thus we just have 27396b3ba5bdSAli Bahrami * to scan one (typically a single alias) or more (in the uncommon 27406b3ba5bdSAli Bahrami * instance of multiple weak to strong associations) entries to 27416b3ba5bdSAli Bahrami * determine if a match exists. 27427c478bd9Sstevel@tonic-gate */ 27436b3ba5bdSAli Bahrami if (weak && (OFL_ALLOW_LDYNSYM(ofl) || (etype == ET_DYN)) && 2744d579eb63Sab (total > local)) { 27456b3ba5bdSAli Bahrami static Sym_desc **sort; 27466b3ba5bdSAli Bahrami static size_t osize = 0; 27476b3ba5bdSAli Bahrami size_t nsize = (total - local) * sizeof (Sym_desc *); 27487c478bd9Sstevel@tonic-gate 27496b3ba5bdSAli Bahrami /* 27506b3ba5bdSAli Bahrami * As we might be processing many input files, and many symbols, 27516b3ba5bdSAli Bahrami * try and reuse a static sort buffer. Note, presently we're 27526b3ba5bdSAli Bahrami * playing the game of never freeing any buffers as there's a 27536b3ba5bdSAli Bahrami * belief this wastes time. 27546b3ba5bdSAli Bahrami */ 27556b3ba5bdSAli Bahrami if ((osize == 0) || (nsize > osize)) { 27566b3ba5bdSAli Bahrami if ((sort = libld_malloc(nsize)) == NULL) 27576b3ba5bdSAli Bahrami return (S_ERROR); 27586b3ba5bdSAli Bahrami osize = nsize; 27596b3ba5bdSAli Bahrami } 27606b3ba5bdSAli Bahrami (void) memcpy((void *)sort, &ifl->ifl_oldndx[local], nsize); 27617c478bd9Sstevel@tonic-gate 27627c478bd9Sstevel@tonic-gate qsort(sort, (total - local), sizeof (Sym_desc *), compare); 27637c478bd9Sstevel@tonic-gate 27647c478bd9Sstevel@tonic-gate for (ndx = 0; ndx < (total - local); ndx++) { 27656b3ba5bdSAli Bahrami Sym_desc *wsdp = sort[ndx]; 27666b3ba5bdSAli Bahrami Sym *wsym; 27677c478bd9Sstevel@tonic-gate int sndx; 27687c478bd9Sstevel@tonic-gate 27696b3ba5bdSAli Bahrami /* 27706b3ba5bdSAli Bahrami * Ignore any empty symbol descriptor, or the case where 27716b3ba5bdSAli Bahrami * the symbol has been resolved to a different file. 27726b3ba5bdSAli Bahrami */ 27736b3ba5bdSAli Bahrami if ((wsdp == NULL) || (wsdp->sd_file != ifl)) 27747c478bd9Sstevel@tonic-gate continue; 27757c478bd9Sstevel@tonic-gate 27767c478bd9Sstevel@tonic-gate wsym = wsdp->sd_sym; 27777c478bd9Sstevel@tonic-gate 27786b3ba5bdSAli Bahrami if ((wsym->st_shndx == SHN_UNDEF) || 27796b3ba5bdSAli Bahrami (wsdp->sd_flags & FLG_SY_SPECSEC) || 27806b3ba5bdSAli Bahrami (ELF_ST_BIND(wsym->st_info) != STB_WEAK)) 27817c478bd9Sstevel@tonic-gate continue; 27827c478bd9Sstevel@tonic-gate 27837c478bd9Sstevel@tonic-gate /* 27847c478bd9Sstevel@tonic-gate * We have a weak symbol, if it has a strong alias it 27857c478bd9Sstevel@tonic-gate * will have been sorted to one of the following sort 27867c478bd9Sstevel@tonic-gate * table entries. Note that we could have multiple weak 27877c478bd9Sstevel@tonic-gate * symbols aliased to one strong (if this occurs then 27887c478bd9Sstevel@tonic-gate * the strong symbol only maintains one alias back to 27897c478bd9Sstevel@tonic-gate * the last weak). 27907c478bd9Sstevel@tonic-gate */ 27917c478bd9Sstevel@tonic-gate for (sndx = ndx + 1; sndx < (total - local); sndx++) { 27926b3ba5bdSAli Bahrami Sym_desc *ssdp = sort[sndx]; 27936b3ba5bdSAli Bahrami Sym *ssym; 2794635216b6SRod Evans sd_flag_t w_dynbits, s_dynbits; 27957c478bd9Sstevel@tonic-gate 27966b3ba5bdSAli Bahrami /* 27976b3ba5bdSAli Bahrami * Ignore any empty symbol descriptor, or the 27986b3ba5bdSAli Bahrami * case where the symbol has been resolved to a 27996b3ba5bdSAli Bahrami * different file. 28006b3ba5bdSAli Bahrami */ 28016b3ba5bdSAli Bahrami if ((ssdp == NULL) || (ssdp->sd_file != ifl)) 28026b3ba5bdSAli Bahrami continue; 28037c478bd9Sstevel@tonic-gate 28047c478bd9Sstevel@tonic-gate ssym = ssdp->sd_sym; 28057c478bd9Sstevel@tonic-gate 28066b3ba5bdSAli Bahrami if (ssym->st_shndx == SHN_UNDEF) 28076b3ba5bdSAli Bahrami continue; 28086b3ba5bdSAli Bahrami 28096b3ba5bdSAli Bahrami if ((ssym->st_shndx != wsym->st_shndx) || 28106b3ba5bdSAli Bahrami (ssym->st_value != wsym->st_value)) 28117c478bd9Sstevel@tonic-gate break; 28127c478bd9Sstevel@tonic-gate 28136b3ba5bdSAli Bahrami if ((ssym->st_size != wsym->st_size) || 28146b3ba5bdSAli Bahrami (ssdp->sd_flags & FLG_SY_SPECSEC) || 28156b3ba5bdSAli Bahrami (ELF_ST_BIND(ssym->st_info) == STB_WEAK)) 28166b3ba5bdSAli Bahrami continue; 2817d579eb63Sab 28186b3ba5bdSAli Bahrami /* 28196b3ba5bdSAli Bahrami * If a sharable object, set link fields so 28206b3ba5bdSAli Bahrami * that they reference each other.` 28216b3ba5bdSAli Bahrami */ 28226b3ba5bdSAli Bahrami if (etype == ET_DYN) { 28236b3ba5bdSAli Bahrami ssdp->sd_aux->sa_linkndx = 28246b3ba5bdSAli Bahrami (Word)wsdp->sd_symndx; 28256b3ba5bdSAli Bahrami wsdp->sd_aux->sa_linkndx = 28266b3ba5bdSAli Bahrami (Word)ssdp->sd_symndx; 28276b3ba5bdSAli Bahrami } 28286b3ba5bdSAli Bahrami 28296b3ba5bdSAli Bahrami /* 28306b3ba5bdSAli Bahrami * Determine which of these two symbols go into 28316b3ba5bdSAli Bahrami * the sort section. If a mapfile has made 28326b3ba5bdSAli Bahrami * explicit settings of the FLG_SY_*DYNSORT 28336b3ba5bdSAli Bahrami * flags for both symbols, then we do what they 28346b3ba5bdSAli Bahrami * say. If one has the DYNSORT flags set, we 28356b3ba5bdSAli Bahrami * set the NODYNSORT bit in the other. And if 28366b3ba5bdSAli Bahrami * neither has an explicit setting, then we 28376b3ba5bdSAli Bahrami * favor the weak symbol because they usually 28386b3ba5bdSAli Bahrami * lack the leading underscore. 28396b3ba5bdSAli Bahrami */ 28406b3ba5bdSAli Bahrami w_dynbits = wsdp->sd_flags & 28416b3ba5bdSAli Bahrami (FLG_SY_DYNSORT | FLG_SY_NODYNSORT); 28426b3ba5bdSAli Bahrami s_dynbits = ssdp->sd_flags & 28436b3ba5bdSAli Bahrami (FLG_SY_DYNSORT | FLG_SY_NODYNSORT); 28446b3ba5bdSAli Bahrami if (!(w_dynbits && s_dynbits)) { 28456b3ba5bdSAli Bahrami if (s_dynbits) { 28466b3ba5bdSAli Bahrami if (s_dynbits == FLG_SY_DYNSORT) 284733eb6ee1Sab wsdp->sd_flags |= 284833eb6ee1Sab FLG_SY_NODYNSORT; 28496b3ba5bdSAli Bahrami } else if (w_dynbits != 28506b3ba5bdSAli Bahrami FLG_SY_NODYNSORT) { 28516b3ba5bdSAli Bahrami ssdp->sd_flags |= 28526b3ba5bdSAli Bahrami FLG_SY_NODYNSORT; 2853d579eb63Sab } 28547c478bd9Sstevel@tonic-gate } 28556b3ba5bdSAli Bahrami break; 28567c478bd9Sstevel@tonic-gate } 28577c478bd9Sstevel@tonic-gate } 28587c478bd9Sstevel@tonic-gate } 285908278a5eSRod Evans 286008278a5eSRod Evans /* 286108278a5eSRod Evans * Having processed all symbols, under -z symbolcap, reprocess any 286208278a5eSRod Evans * symbols that are being translated from global to locals. The symbol 286308278a5eSRod Evans * pair that has been collected defines the original symbol (c_osdp), 286408278a5eSRod Evans * which will become a local, and the new symbol (c_nsdp), which will 286508278a5eSRod Evans * become a reference (UNDEF) for the original. 286608278a5eSRod Evans * 286708278a5eSRod Evans * Scan these symbol pairs looking for weak symbols, which have non-weak 286808278a5eSRod Evans * aliases. There is no need to translate both of these symbols to 286908278a5eSRod Evans * locals, only the global is necessary. 287008278a5eSRod Evans */ 287108278a5eSRod Evans if (cappairs) { 287208278a5eSRod Evans Aliste idx1; 287308278a5eSRod Evans Cap_pair *cpp1; 287408278a5eSRod Evans 287508278a5eSRod Evans for (ALIST_TRAVERSE(cappairs, idx1, cpp1)) { 287608278a5eSRod Evans Sym_desc *sdp1 = cpp1->c_osdp; 287708278a5eSRod Evans Sym *sym1 = sdp1->sd_sym; 287808278a5eSRod Evans uchar_t bind1 = ELF_ST_BIND(sym1->st_info); 287908278a5eSRod Evans Aliste idx2; 288008278a5eSRod Evans Cap_pair *cpp2; 288108278a5eSRod Evans 288208278a5eSRod Evans /* 288308278a5eSRod Evans * If this symbol isn't weak, it's capability member is 288408278a5eSRod Evans * retained for the creation of a local symbol. 288508278a5eSRod Evans */ 288608278a5eSRod Evans if (bind1 != STB_WEAK) 288708278a5eSRod Evans continue; 288808278a5eSRod Evans 288908278a5eSRod Evans /* 289008278a5eSRod Evans * If this is a weak symbol, traverse the capabilities 289108278a5eSRod Evans * list again to determine if a corresponding non-weak 289208278a5eSRod Evans * symbol exists. 289308278a5eSRod Evans */ 289408278a5eSRod Evans for (ALIST_TRAVERSE(cappairs, idx2, cpp2)) { 289508278a5eSRod Evans Sym_desc *sdp2 = cpp2->c_osdp; 289608278a5eSRod Evans Sym *sym2 = sdp2->sd_sym; 289708278a5eSRod Evans uchar_t bind2 = 289808278a5eSRod Evans ELF_ST_BIND(sym2->st_info); 289908278a5eSRod Evans 290008278a5eSRod Evans if ((cpp1 == cpp2) || 290108278a5eSRod Evans (cpp1->c_group != cpp2->c_group) || 290208278a5eSRod Evans (sym1->st_value != sym2->st_value) || 290308278a5eSRod Evans (bind2 == STB_WEAK)) 290408278a5eSRod Evans continue; 290508278a5eSRod Evans 290608278a5eSRod Evans /* 290708278a5eSRod Evans * The weak symbol (sym1) has a non-weak (sym2) 290808278a5eSRod Evans * counterpart. There's no point in translating 290908278a5eSRod Evans * both of these equivalent symbols to locals. 291008278a5eSRod Evans * Add this symbol capability alias to the 291108278a5eSRod Evans * capabilities family information, and remove 291208278a5eSRod Evans * the weak symbol. 291308278a5eSRod Evans */ 291408278a5eSRod Evans if (ld_cap_add_family(ofl, cpp2->c_nsdp, 291508278a5eSRod Evans cpp1->c_nsdp, NULL, NULL) == S_ERROR) 291608278a5eSRod Evans return (S_ERROR); 291708278a5eSRod Evans 291808278a5eSRod Evans free((void *)cpp1->c_osdp); 291908278a5eSRod Evans (void) alist_delete(cappairs, &idx1); 292008278a5eSRod Evans } 292108278a5eSRod Evans } 292208278a5eSRod Evans 292308278a5eSRod Evans DBG_CALL(Dbg_util_nl(ofl->ofl_lml, DBG_NL_STD)); 292408278a5eSRod Evans 292508278a5eSRod Evans /* 292608278a5eSRod Evans * The capability pairs information now represents all the 292708278a5eSRod Evans * global symbols that need transforming to locals. These 292808278a5eSRod Evans * local symbols are renamed using their group identifiers. 292908278a5eSRod Evans */ 293008278a5eSRod Evans for (ALIST_TRAVERSE(cappairs, idx1, cpp1)) { 293108278a5eSRod Evans Sym_desc *osdp = cpp1->c_osdp; 293208278a5eSRod Evans Objcapset *capset; 293308278a5eSRod Evans size_t nsize, tsize; 293408278a5eSRod Evans const char *oname; 293508278a5eSRod Evans char *cname, *idstr; 293608278a5eSRod Evans Sym *csym; 293708278a5eSRod Evans 293808278a5eSRod Evans /* 293908278a5eSRod Evans * If the local symbol has not yet been translated 294008278a5eSRod Evans * convert it to a local symbol with a name. 294108278a5eSRod Evans */ 294208278a5eSRod Evans if ((osdp->sd_flags & FLG_SY_CAP) != 0) 294308278a5eSRod Evans continue; 294408278a5eSRod Evans 294508278a5eSRod Evans /* 294608278a5eSRod Evans * As we're converting object capabilities to symbol 294708278a5eSRod Evans * capabilities, obtain the capabilities set for this 294808278a5eSRod Evans * object, so as to retrieve the CA_SUNW_ID value. 294908278a5eSRod Evans */ 295008278a5eSRod Evans capset = &cpp1->c_group->cg_set; 295108278a5eSRod Evans 295208278a5eSRod Evans /* 295308278a5eSRod Evans * Create a new name from the existing symbol and the 295408278a5eSRod Evans * capabilities group identifier. Note, the delimiter 295508278a5eSRod Evans * between the symbol name and identifier name is hard- 295608278a5eSRod Evans * coded here (%), so that we establish a convention 295708278a5eSRod Evans * for transformed symbol names. 295808278a5eSRod Evans */ 295908278a5eSRod Evans oname = osdp->sd_name; 296008278a5eSRod Evans 296108278a5eSRod Evans idstr = capset->oc_id.cs_str; 296208278a5eSRod Evans nsize = strlen(oname); 296308278a5eSRod Evans tsize = nsize + 1 + strlen(idstr) + 1; 296408278a5eSRod Evans if ((cname = libld_malloc(tsize)) == 0) 296508278a5eSRod Evans return (S_ERROR); 296608278a5eSRod Evans 296708278a5eSRod Evans (void) strcpy(cname, oname); 296808278a5eSRod Evans cname[nsize++] = '%'; 296908278a5eSRod Evans (void) strcpy(&cname[nsize], idstr); 297008278a5eSRod Evans 297108278a5eSRod Evans /* 297208278a5eSRod Evans * Allocate a new symbol table entry, transform this 297308278a5eSRod Evans * symbol to a local, and assign the new name. 297408278a5eSRod Evans */ 297508278a5eSRod Evans if ((csym = libld_malloc(sizeof (Sym))) == NULL) 297608278a5eSRod Evans return (S_ERROR); 297708278a5eSRod Evans 297808278a5eSRod Evans *csym = *osdp->sd_sym; 297908278a5eSRod Evans csym->st_info = ELF_ST_INFO(STB_LOCAL, 298008278a5eSRod Evans ELF_ST_TYPE(osdp->sd_sym->st_info)); 298108278a5eSRod Evans 298208278a5eSRod Evans osdp->sd_name = cname; 298308278a5eSRod Evans osdp->sd_sym = csym; 298408278a5eSRod Evans osdp->sd_flags = FLG_SY_CAP; 298508278a5eSRod Evans 298608278a5eSRod Evans /* 298708278a5eSRod Evans * Keep track of this new local symbol. As -z symbolcap 298808278a5eSRod Evans * can only be used to create a relocatable object, a 298908278a5eSRod Evans * dynamic symbol table can't exist. Ensure there is 299008278a5eSRod Evans * space reserved in the string table. 299108278a5eSRod Evans */ 299208278a5eSRod Evans ofl->ofl_caploclcnt++; 299308278a5eSRod Evans if (st_insert(ofl->ofl_strtab, cname) == -1) 299408278a5eSRod Evans return (S_ERROR); 299508278a5eSRod Evans 299608278a5eSRod Evans DBG_CALL(Dbg_syms_cap_local(ofl, cpp1->c_ndx, 299708278a5eSRod Evans cname, csym, osdp)); 299808278a5eSRod Evans 299908278a5eSRod Evans /* 300008278a5eSRod Evans * Establish this capability pair as a family. 300108278a5eSRod Evans */ 300208278a5eSRod Evans if (ld_cap_add_family(ofl, cpp1->c_nsdp, osdp, 300308278a5eSRod Evans cpp1->c_group, &ifl->ifl_caps->ca_syms) == S_ERROR) 300408278a5eSRod Evans return (S_ERROR); 300508278a5eSRod Evans } 300608278a5eSRod Evans } 300708278a5eSRod Evans 30087c478bd9Sstevel@tonic-gate return (1); 300975e45495Sab 301075e45495Sab #undef SYM_LOC_BADADDR 30117c478bd9Sstevel@tonic-gate } 30127c478bd9Sstevel@tonic-gate 30137c478bd9Sstevel@tonic-gate /* 3014f5a18a30Srie * Add an undefined symbol to the symbol table. The reference originates from 301508278a5eSRod Evans * the location identified by the message id (mid). These references can 3016f5a18a30Srie * originate from command line options such as -e, -u, -initarray, etc. 3017f5a18a30Srie * (identified with MSG_INTL(MSG_STR_COMMAND)), or from internally generated 3018f5a18a30Srie * TLS relocation references (identified with MSG_INTL(MSG_STR_TLSREL)). 30197c478bd9Sstevel@tonic-gate */ 30207c478bd9Sstevel@tonic-gate Sym_desc * 3021f5a18a30Srie ld_sym_add_u(const char *name, Ofl_desc *ofl, Msg mid) 30227c478bd9Sstevel@tonic-gate { 30237c478bd9Sstevel@tonic-gate Sym *sym; 30246b3ba5bdSAli Bahrami Ifl_desc *ifl = NULL, *_ifl; 30257c478bd9Sstevel@tonic-gate Sym_desc *sdp; 30267c478bd9Sstevel@tonic-gate Word hash; 302757ef7aa9SRod Evans Aliste idx; 30287c478bd9Sstevel@tonic-gate avl_index_t where; 3029f5a18a30Srie const char *reference = MSG_INTL(mid); 30307c478bd9Sstevel@tonic-gate 30317c478bd9Sstevel@tonic-gate /* 3032b02637afSrie * As an optimization, determine whether we've already generated this 3033b02637afSrie * reference. If the symbol doesn't already exist we'll create it. 3034b02637afSrie * Or if the symbol does exist from a different source, we'll resolve 3035b02637afSrie * the conflict. 30367c478bd9Sstevel@tonic-gate */ 30377c478bd9Sstevel@tonic-gate /* LINTED */ 30387c478bd9Sstevel@tonic-gate hash = (Word)elf_hash(name); 3039b02637afSrie if ((sdp = ld_sym_find(name, hash, &where, ofl)) != NULL) { 3040b02637afSrie if ((sdp->sd_sym->st_shndx == SHN_UNDEF) && 3041b02637afSrie (sdp->sd_file->ifl_name == reference)) 3042b02637afSrie return (sdp); 30437c478bd9Sstevel@tonic-gate } 30447c478bd9Sstevel@tonic-gate 30457c478bd9Sstevel@tonic-gate /* 30467c478bd9Sstevel@tonic-gate * Determine whether a pseudo input file descriptor exists to represent 30477c478bd9Sstevel@tonic-gate * the command line, as any global symbol needs an input file descriptor 30487c478bd9Sstevel@tonic-gate * during any symbol resolution (refer to map_ifl() which provides a 30497c478bd9Sstevel@tonic-gate * similar method for adding symbols from mapfiles). 30507c478bd9Sstevel@tonic-gate */ 305157ef7aa9SRod Evans for (APLIST_TRAVERSE(ofl->ofl_objs, idx, _ifl)) 3052f5a18a30Srie if (strcmp(_ifl->ifl_name, reference) == 0) { 30537c478bd9Sstevel@tonic-gate ifl = _ifl; 30547c478bd9Sstevel@tonic-gate break; 30557c478bd9Sstevel@tonic-gate } 30567c478bd9Sstevel@tonic-gate 30577c478bd9Sstevel@tonic-gate /* 30587c478bd9Sstevel@tonic-gate * If no descriptor exists create one. 30597c478bd9Sstevel@tonic-gate */ 30606b3ba5bdSAli Bahrami if (ifl == NULL) { 306157ef7aa9SRod Evans if ((ifl = libld_calloc(sizeof (Ifl_desc), 1)) == NULL) 30627c478bd9Sstevel@tonic-gate return ((Sym_desc *)S_ERROR); 3063f5a18a30Srie ifl->ifl_name = reference; 30647c478bd9Sstevel@tonic-gate ifl->ifl_flags = FLG_IF_NEEDED | FLG_IF_FILEREF; 306557ef7aa9SRod Evans if ((ifl->ifl_ehdr = libld_calloc(sizeof (Ehdr), 1)) == NULL) 30667c478bd9Sstevel@tonic-gate return ((Sym_desc *)S_ERROR); 30677c478bd9Sstevel@tonic-gate ifl->ifl_ehdr->e_type = ET_REL; 30687c478bd9Sstevel@tonic-gate 306957ef7aa9SRod Evans if (aplist_append(&ofl->ofl_objs, ifl, AL_CNT_OFL_OBJS) == NULL) 30707c478bd9Sstevel@tonic-gate return ((Sym_desc *)S_ERROR); 30717c478bd9Sstevel@tonic-gate } 30727c478bd9Sstevel@tonic-gate 30737c478bd9Sstevel@tonic-gate /* 30747c478bd9Sstevel@tonic-gate * Allocate a symbol structure and add it to the global symbol table. 30757c478bd9Sstevel@tonic-gate */ 30766b3ba5bdSAli Bahrami if ((sym = libld_calloc(sizeof (Sym), 1)) == NULL) 30777c478bd9Sstevel@tonic-gate return ((Sym_desc *)S_ERROR); 30787c478bd9Sstevel@tonic-gate sym->st_info = ELF_ST_INFO(STB_GLOBAL, STT_NOTYPE); 30797c478bd9Sstevel@tonic-gate sym->st_shndx = SHN_UNDEF; 30807c478bd9Sstevel@tonic-gate 30815aefb655Srie DBG_CALL(Dbg_syms_process(ofl->ofl_lml, ifl)); 3082b02637afSrie if (sdp == NULL) { 3083b02637afSrie DBG_CALL(Dbg_syms_global(ofl->ofl_lml, 0, name)); 3084b02637afSrie if ((sdp = ld_sym_enter(name, sym, hash, ifl, ofl, 0, SHN_UNDEF, 3085635216b6SRod Evans 0, &where)) == (Sym_desc *)S_ERROR) 3086b02637afSrie return ((Sym_desc *)S_ERROR); 3087b02637afSrie } else if (ld_sym_resolve(sdp, sym, ifl, ofl, 0, 3088b02637afSrie SHN_UNDEF, 0) == S_ERROR) 3089b02637afSrie return ((Sym_desc *)S_ERROR); 3090b02637afSrie 30917c478bd9Sstevel@tonic-gate sdp->sd_flags &= ~FLG_SY_CLEAN; 30927c478bd9Sstevel@tonic-gate sdp->sd_flags |= FLG_SY_CMDREF; 30937c478bd9Sstevel@tonic-gate 30947c478bd9Sstevel@tonic-gate return (sdp); 30957c478bd9Sstevel@tonic-gate } 30964a8d0ea7SAli Bahrami 30974a8d0ea7SAli Bahrami /* 30984a8d0ea7SAli Bahrami * STT_SECTION symbols have their st_name field set to NULL, and consequently 3099bf994817SAli Bahrami * have no name. Generate a name suitable for diagnostic use for such a symbol 3100bf994817SAli Bahrami * and store it in the input section descriptor. The resulting name will be 3101bf994817SAli Bahrami * of the form: 31024a8d0ea7SAli Bahrami * 31034a8d0ea7SAli Bahrami * "XXX (section)" 31044a8d0ea7SAli Bahrami * 31054a8d0ea7SAli Bahrami * where XXX is the name of the section. 31064a8d0ea7SAli Bahrami * 31074a8d0ea7SAli Bahrami * entry: 310808278a5eSRod Evans * isc - Input section associated with the symbol. 31094a8d0ea7SAli Bahrami * fmt - NULL, or format string to use. 31104a8d0ea7SAli Bahrami * 31114a8d0ea7SAli Bahrami * exit: 3112bf994817SAli Bahrami * Sets isp->is_sym_name to the allocated string. Returns the 3113bf994817SAli Bahrami * string pointer, or NULL on allocation failure. 31144a8d0ea7SAli Bahrami */ 311584f79254SToomas Soome const char * 31164a8d0ea7SAli Bahrami ld_stt_section_sym_name(Is_desc *isp) 31174a8d0ea7SAli Bahrami { 3118bf994817SAli Bahrami const char *fmt; 3119bf994817SAli Bahrami char *str; 3120bf994817SAli Bahrami size_t len; 31214a8d0ea7SAli Bahrami 3122bf994817SAli Bahrami if ((isp == NULL) || (isp->is_name == NULL)) 3123bf994817SAli Bahrami return (NULL); 31244a8d0ea7SAli Bahrami 3125bf994817SAli Bahrami if (isp->is_sym_name == NULL) { 31264a8d0ea7SAli Bahrami fmt = (isp->is_flags & FLG_IS_GNSTRMRG) ? 31274a8d0ea7SAli Bahrami MSG_INTL(MSG_STR_SECTION_MSTR) : MSG_INTL(MSG_STR_SECTION); 31284a8d0ea7SAli Bahrami 31294a8d0ea7SAli Bahrami len = strlen(fmt) + strlen(isp->is_name) + 1; 31304a8d0ea7SAli Bahrami 3131bf994817SAli Bahrami if ((str = libld_malloc(len)) == NULL) 31324a8d0ea7SAli Bahrami return (NULL); 3133bf994817SAli Bahrami (void) snprintf(str, len, fmt, isp->is_name); 3134bf994817SAli Bahrami isp->is_sym_name = str; 31354a8d0ea7SAli Bahrami } 31364a8d0ea7SAli Bahrami 3137bf994817SAli Bahrami return (isp->is_sym_name); 31384a8d0ea7SAli Bahrami } 3139*c524b4feSRichard Lowe 3140*c524b4feSRichard Lowe /* 3141*c524b4feSRichard Lowe * If we're producing a relocatable object and the symbol is eligible for 3142*c524b4feSRichard Lowe * COMDAT section, it shouldn't be reduced in scope as that will break the 3143*c524b4feSRichard Lowe * COMDAT matching when the output object is later consumed. Leave it alone, 3144*c524b4feSRichard Lowe * and any reduction (and COMDAT) processing will occur then. 3145*c524b4feSRichard Lowe * 3146*c524b4feSRichard Lowe * Otherwise, any hidden symbol is reduced when reductions are being processed. 3147*c524b4feSRichard Lowe */ 3148*c524b4feSRichard Lowe Boolean 3149*c524b4feSRichard Lowe ld_sym_reducable(Ofl_desc *ofl, Sym_desc *sdp) 3150*c524b4feSRichard Lowe { 3151*c524b4feSRichard Lowe Is_desc *isc = sdp->sd_isc; 3152*c524b4feSRichard Lowe 3153*c524b4feSRichard Lowe if (((ofl->ofl_flags & FLG_OF_RELOBJ) != 0) && 3154*c524b4feSRichard Lowe (isc != NULL) && 3155*c524b4feSRichard Lowe ((isc->is_flags & FLG_IS_COMDAT) != 0)) { 3156*c524b4feSRichard Lowe return (FALSE); 3157*c524b4feSRichard Lowe } else { 3158*c524b4feSRichard Lowe return (SYM_IS_HIDDEN(sdp) && 3159*c524b4feSRichard Lowe (ofl->ofl_flags & FLG_OF_PROCRED)); 3160*c524b4feSRichard Lowe } 3161*c524b4feSRichard Lowe } 3162