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 57c478bd9Sstevel@tonic-gate * Common Development and Distribution License, Version 1.0 only 67c478bd9Sstevel@tonic-gate * (the "License"). You may not use this file except in compliance 77c478bd9Sstevel@tonic-gate * with the License. 87c478bd9Sstevel@tonic-gate * 97c478bd9Sstevel@tonic-gate * You can obtain a copy of the license at usr/src/OPENSOLARIS.LICENSE 107c478bd9Sstevel@tonic-gate * or http://www.opensolaris.org/os/licensing. 117c478bd9Sstevel@tonic-gate * See the License for the specific language governing permissions 127c478bd9Sstevel@tonic-gate * and limitations under the License. 137c478bd9Sstevel@tonic-gate * 147c478bd9Sstevel@tonic-gate * When distributing Covered Code, include this CDDL HEADER in each 157c478bd9Sstevel@tonic-gate * file and include the License file at usr/src/OPENSOLARIS.LICENSE. 167c478bd9Sstevel@tonic-gate * If applicable, add the following below this CDDL HEADER, with the 177c478bd9Sstevel@tonic-gate * fields enclosed by brackets "[]" replaced with your own identifying 187c478bd9Sstevel@tonic-gate * information: Portions Copyright [yyyy] [name of copyright owner] 197c478bd9Sstevel@tonic-gate * 207c478bd9Sstevel@tonic-gate * CDDL HEADER END 217c478bd9Sstevel@tonic-gate */ 227c478bd9Sstevel@tonic-gate /* 237c478bd9Sstevel@tonic-gate * Copyright (c) 1988 AT&T 247c478bd9Sstevel@tonic-gate * All Rights Reserved 257c478bd9Sstevel@tonic-gate * 267c478bd9Sstevel@tonic-gate * 277c478bd9Sstevel@tonic-gate * Copyright 2005 Sun Microsystems, Inc. All rights reserved. 287c478bd9Sstevel@tonic-gate * Use is subject to license terms. 297c478bd9Sstevel@tonic-gate */ 307c478bd9Sstevel@tonic-gate #pragma ident "%Z%%M% %I% %E% SMI" 317c478bd9Sstevel@tonic-gate 327c478bd9Sstevel@tonic-gate /* 337c478bd9Sstevel@tonic-gate * Symbol table management routines 347c478bd9Sstevel@tonic-gate */ 357c478bd9Sstevel@tonic-gate #include <stdio.h> 367c478bd9Sstevel@tonic-gate #include <string.h> 377c478bd9Sstevel@tonic-gate #include "debug.h" 387c478bd9Sstevel@tonic-gate #include "msg.h" 397c478bd9Sstevel@tonic-gate #include "_libld.h" 407c478bd9Sstevel@tonic-gate 417c478bd9Sstevel@tonic-gate /* 427c478bd9Sstevel@tonic-gate * AVL tree comparator function: 437c478bd9Sstevel@tonic-gate * 447c478bd9Sstevel@tonic-gate * The primary key is the 'sa_hashval' with a secondary 457c478bd9Sstevel@tonic-gate * key of the symbol name itself. 467c478bd9Sstevel@tonic-gate */ 477c478bd9Sstevel@tonic-gate int 487c478bd9Sstevel@tonic-gate sym_avl_comp(const void *elem1, const void *elem2) 497c478bd9Sstevel@tonic-gate { 507c478bd9Sstevel@tonic-gate int res; 517c478bd9Sstevel@tonic-gate Sym_avlnode *sav1 = (Sym_avlnode *)elem1; 527c478bd9Sstevel@tonic-gate Sym_avlnode *sav2 = (Sym_avlnode *)elem2; 537c478bd9Sstevel@tonic-gate 547c478bd9Sstevel@tonic-gate res = sav1->sav_hash - sav2->sav_hash; 557c478bd9Sstevel@tonic-gate 567c478bd9Sstevel@tonic-gate if (res < 0) 577c478bd9Sstevel@tonic-gate return (-1); 587c478bd9Sstevel@tonic-gate if (res > 0) 597c478bd9Sstevel@tonic-gate return (1); 607c478bd9Sstevel@tonic-gate 617c478bd9Sstevel@tonic-gate /* 627c478bd9Sstevel@tonic-gate * Hash is equal - now compare name 637c478bd9Sstevel@tonic-gate */ 647c478bd9Sstevel@tonic-gate res = strcmp(sav1->sav_name, sav2->sav_name); 657c478bd9Sstevel@tonic-gate if (res == 0) 667c478bd9Sstevel@tonic-gate return (0); 677c478bd9Sstevel@tonic-gate if (res > 0) 687c478bd9Sstevel@tonic-gate return (1); 697c478bd9Sstevel@tonic-gate return (-1); 707c478bd9Sstevel@tonic-gate } 717c478bd9Sstevel@tonic-gate 727c478bd9Sstevel@tonic-gate 737c478bd9Sstevel@tonic-gate /* 747c478bd9Sstevel@tonic-gate * Focal point for verifying symbol names. 757c478bd9Sstevel@tonic-gate */ 767c478bd9Sstevel@tonic-gate const char * 777c478bd9Sstevel@tonic-gate string(Ifl_desc *ifl, Sym *sym, const char *strs, size_t strsize, int symndx, 787c478bd9Sstevel@tonic-gate Word shndx, const char *symsecname, const char *strsecname, Word * flags) 797c478bd9Sstevel@tonic-gate { 807c478bd9Sstevel@tonic-gate const char *regname; 817c478bd9Sstevel@tonic-gate Word name = sym->st_name; 827c478bd9Sstevel@tonic-gate 837c478bd9Sstevel@tonic-gate if (name) { 847c478bd9Sstevel@tonic-gate if ((ifl->ifl_flags & FLG_IF_HSTRTAB) == 0) { 857c478bd9Sstevel@tonic-gate eprintf(ERR_FATAL, MSG_INTL(MSG_FIL_NOSTRTABLE), 867c478bd9Sstevel@tonic-gate ifl->ifl_name, symsecname, symndx, EC_XWORD(name)); 877c478bd9Sstevel@tonic-gate return (0); 887c478bd9Sstevel@tonic-gate } 897c478bd9Sstevel@tonic-gate if (name >= (Word)strsize) { 907c478bd9Sstevel@tonic-gate eprintf(ERR_FATAL, MSG_INTL(MSG_FIL_EXCSTRTABLE), 917c478bd9Sstevel@tonic-gate ifl->ifl_name, symsecname, symndx, EC_XWORD(name), 927c478bd9Sstevel@tonic-gate strsecname, EC_XWORD(strsize)); 937c478bd9Sstevel@tonic-gate return (0); 947c478bd9Sstevel@tonic-gate } 957c478bd9Sstevel@tonic-gate } 967c478bd9Sstevel@tonic-gate 977c478bd9Sstevel@tonic-gate /* 987c478bd9Sstevel@tonic-gate * Determine if we're dealing with a register and if so validate it. 997c478bd9Sstevel@tonic-gate * If it's a scratch register, a fabricated name will be returned. 1007c478bd9Sstevel@tonic-gate */ 1017c478bd9Sstevel@tonic-gate if ((regname = is_regsym(ifl, sym, strs, symndx, shndx, 1027c478bd9Sstevel@tonic-gate symsecname, flags)) == (const char *)S_ERROR) { 1037c478bd9Sstevel@tonic-gate return (0); 1047c478bd9Sstevel@tonic-gate } 1057c478bd9Sstevel@tonic-gate if (regname) 1067c478bd9Sstevel@tonic-gate return (regname); 1077c478bd9Sstevel@tonic-gate 1087c478bd9Sstevel@tonic-gate /* 1097c478bd9Sstevel@tonic-gate * If this isn't a register, but we have a global symbol with a null 1107c478bd9Sstevel@tonic-gate * name, we're not going to be able to hash this, search for it, or 1117c478bd9Sstevel@tonic-gate * do anything interesting. However, we've been accepting a symbol of 1127c478bd9Sstevel@tonic-gate * this kind for ages now, so give the user a warning (rather than a 1137c478bd9Sstevel@tonic-gate * fatal error), just in case this instance exists somewhere in the 1147c478bd9Sstevel@tonic-gate * world and hasn't, as yet, been a problem. 1157c478bd9Sstevel@tonic-gate */ 1167c478bd9Sstevel@tonic-gate if ((name == 0) && (ELF_ST_BIND(sym->st_info) != STB_LOCAL)) { 1177c478bd9Sstevel@tonic-gate eprintf(ERR_WARNING, MSG_INTL(MSG_FIL_NONAMESYM), 1187c478bd9Sstevel@tonic-gate ifl->ifl_name, symsecname, symndx, EC_XWORD(name)); 1197c478bd9Sstevel@tonic-gate } 1207c478bd9Sstevel@tonic-gate return (strs + name); 1217c478bd9Sstevel@tonic-gate } 1227c478bd9Sstevel@tonic-gate 1237c478bd9Sstevel@tonic-gate /* 1247c478bd9Sstevel@tonic-gate * Shared objects can be built that define specific symbols that can not be 1257c478bd9Sstevel@tonic-gate * directly bound to. These objects have a syminfo section (and an associated 1267c478bd9Sstevel@tonic-gate * DF_1_NODIRECT dynamic flags entry). Scan this table looking for symbols 1277c478bd9Sstevel@tonic-gate * that can't be bound to directly, and if this files symbol is presently 1287c478bd9Sstevel@tonic-gate * referenced, mark it so that we don't directly bind to it. 1297c478bd9Sstevel@tonic-gate */ 1307c478bd9Sstevel@tonic-gate uintptr_t 1317c478bd9Sstevel@tonic-gate sym_nodirect(Is_desc * isp, Ifl_desc * ifl, Ofl_desc * ofl) 1327c478bd9Sstevel@tonic-gate { 1337c478bd9Sstevel@tonic-gate Shdr *sifshdr, *symshdr; 1347c478bd9Sstevel@tonic-gate Syminfo *sifdata; 1357c478bd9Sstevel@tonic-gate Sym *symdata; 1367c478bd9Sstevel@tonic-gate char *strdata; 1377c478bd9Sstevel@tonic-gate ulong_t cnt, _cnt; 1387c478bd9Sstevel@tonic-gate 1397c478bd9Sstevel@tonic-gate /* 1407c478bd9Sstevel@tonic-gate * Get the syminfo data, and determine the number of entries. 1417c478bd9Sstevel@tonic-gate */ 1427c478bd9Sstevel@tonic-gate sifshdr = isp->is_shdr; 1437c478bd9Sstevel@tonic-gate sifdata = (Syminfo *)isp->is_indata->d_buf; 1447c478bd9Sstevel@tonic-gate cnt = sifshdr->sh_size / sifshdr->sh_entsize; 1457c478bd9Sstevel@tonic-gate 1467c478bd9Sstevel@tonic-gate /* 1477c478bd9Sstevel@tonic-gate * Get the associated symbol table. 1487c478bd9Sstevel@tonic-gate */ 1497c478bd9Sstevel@tonic-gate symshdr = ifl->ifl_isdesc[sifshdr->sh_link]->is_shdr; 1507c478bd9Sstevel@tonic-gate symdata = ifl->ifl_isdesc[sifshdr->sh_link]->is_indata->d_buf; 1517c478bd9Sstevel@tonic-gate 1527c478bd9Sstevel@tonic-gate /* 1537c478bd9Sstevel@tonic-gate * Get the string table associated with the symbol table. 1547c478bd9Sstevel@tonic-gate */ 1557c478bd9Sstevel@tonic-gate strdata = ifl->ifl_isdesc[symshdr->sh_link]->is_indata->d_buf; 1567c478bd9Sstevel@tonic-gate 1577c478bd9Sstevel@tonic-gate /* 1587c478bd9Sstevel@tonic-gate * Traverse the syminfo data for symbols that can't be directly 1597c478bd9Sstevel@tonic-gate * bound to. 1607c478bd9Sstevel@tonic-gate */ 1617c478bd9Sstevel@tonic-gate for (_cnt = 1, sifdata++; _cnt < cnt; _cnt++, sifdata++) { 1627c478bd9Sstevel@tonic-gate Sym *sym; 1637c478bd9Sstevel@tonic-gate char *str; 1647c478bd9Sstevel@tonic-gate Sym_desc *sdp; 1657c478bd9Sstevel@tonic-gate 1667c478bd9Sstevel@tonic-gate if (((sifdata->si_flags & SYMINFO_FLG_NOEXTDIRECT) == 0) || 1677c478bd9Sstevel@tonic-gate (sifdata->si_boundto < SYMINFO_BT_LOWRESERVE)) 1687c478bd9Sstevel@tonic-gate continue; 1697c478bd9Sstevel@tonic-gate 1707c478bd9Sstevel@tonic-gate sym = (Sym *)(symdata + _cnt); 1717c478bd9Sstevel@tonic-gate str = (char *)(strdata + sym->st_name); 1727c478bd9Sstevel@tonic-gate 1737c478bd9Sstevel@tonic-gate if (sdp = sym_find(str, SYM_NOHASH, 0, ofl)) { 1747c478bd9Sstevel@tonic-gate if (ifl != sdp->sd_file) 1757c478bd9Sstevel@tonic-gate continue; 1767c478bd9Sstevel@tonic-gate 1777c478bd9Sstevel@tonic-gate sdp->sd_flags1 &= ~FLG_SY1_DIR; 1787c478bd9Sstevel@tonic-gate sdp->sd_flags1 |= FLG_SY1_NDIR; 1797c478bd9Sstevel@tonic-gate } 1807c478bd9Sstevel@tonic-gate } 1817c478bd9Sstevel@tonic-gate return (0); 1827c478bd9Sstevel@tonic-gate } 1837c478bd9Sstevel@tonic-gate 1847c478bd9Sstevel@tonic-gate /* 1857c478bd9Sstevel@tonic-gate * If, during symbol processing, it is necessary to update a local symbols 1867c478bd9Sstevel@tonic-gate * contents before we have generated the symbol tables in the output image, 1877c478bd9Sstevel@tonic-gate * create a new symbol structure and copy the original symbol contents. While 1887c478bd9Sstevel@tonic-gate * we are processing the input files, their local symbols are part of the 1897c478bd9Sstevel@tonic-gate * read-only mapped image. Commonly, these symbols are copied to the new output 1907c478bd9Sstevel@tonic-gate * file image and then updated to reflect their new address and any change in 1917c478bd9Sstevel@tonic-gate * attributes. However, sometimes during relocation counting, it is necessary 1927c478bd9Sstevel@tonic-gate * to adjust the symbols information. This routine provides for the generation 1937c478bd9Sstevel@tonic-gate * of a new symbol image so that this update can be performed. 1947c478bd9Sstevel@tonic-gate * All global symbols are copied to an internal symbol table to improve locality 1957c478bd9Sstevel@tonic-gate * of reference and hence performance, and thus this copying is not necessary. 1967c478bd9Sstevel@tonic-gate */ 1977c478bd9Sstevel@tonic-gate uintptr_t 1987c478bd9Sstevel@tonic-gate sym_copy(Sym_desc *sdp) 1997c478bd9Sstevel@tonic-gate { 2007c478bd9Sstevel@tonic-gate Sym *nsym; 2017c478bd9Sstevel@tonic-gate 2027c478bd9Sstevel@tonic-gate if (sdp->sd_flags & FLG_SY_CLEAN) { 2037c478bd9Sstevel@tonic-gate if ((nsym = libld_malloc(sizeof (Sym))) == 0) 2047c478bd9Sstevel@tonic-gate return (S_ERROR); 2057c478bd9Sstevel@tonic-gate *nsym = *(sdp->sd_sym); 2067c478bd9Sstevel@tonic-gate sdp->sd_sym = nsym; 2077c478bd9Sstevel@tonic-gate sdp->sd_flags &= ~FLG_SY_CLEAN; 2087c478bd9Sstevel@tonic-gate } 2097c478bd9Sstevel@tonic-gate return (1); 2107c478bd9Sstevel@tonic-gate } 2117c478bd9Sstevel@tonic-gate 2127c478bd9Sstevel@tonic-gate /* 2137c478bd9Sstevel@tonic-gate * Finds a given name in the link editors internal symbol table. If no 2147c478bd9Sstevel@tonic-gate * hash value is specified it is calculated. A pointer to the located 2157c478bd9Sstevel@tonic-gate * Sym_desc entry is returned, or NULL if the symbol is not found. 2167c478bd9Sstevel@tonic-gate */ 2177c478bd9Sstevel@tonic-gate Sym_desc * 2187c478bd9Sstevel@tonic-gate sym_find(const char *name, Word hash, avl_index_t *where, Ofl_desc *ofl) 2197c478bd9Sstevel@tonic-gate { 2207c478bd9Sstevel@tonic-gate Sym_avlnode qsav; 2217c478bd9Sstevel@tonic-gate Sym_avlnode *sav; 2227c478bd9Sstevel@tonic-gate 2237c478bd9Sstevel@tonic-gate if (hash == SYM_NOHASH) 2247c478bd9Sstevel@tonic-gate /* LINTED */ 2257c478bd9Sstevel@tonic-gate hash = (Word)elf_hash((const char *)name); 2267c478bd9Sstevel@tonic-gate qsav.sav_hash = hash; 2277c478bd9Sstevel@tonic-gate qsav.sav_name = name; 2287c478bd9Sstevel@tonic-gate 2297c478bd9Sstevel@tonic-gate /* 2307c478bd9Sstevel@tonic-gate * Perform search for symbol in AVL tree. Note that the 'where' field 2317c478bd9Sstevel@tonic-gate * is passed in from the caller. If a 'where' is present, it can be 2327c478bd9Sstevel@tonic-gate * used in subsequent 'sym_enter()' calls if required. 2337c478bd9Sstevel@tonic-gate */ 2347c478bd9Sstevel@tonic-gate sav = avl_find(&ofl->ofl_symavl, &qsav, where); 2357c478bd9Sstevel@tonic-gate 2367c478bd9Sstevel@tonic-gate /* 2377c478bd9Sstevel@tonic-gate * If symbol was not found in the avl tree, return null to show that. 2387c478bd9Sstevel@tonic-gate */ 2397c478bd9Sstevel@tonic-gate if (sav == 0) 2407c478bd9Sstevel@tonic-gate return (0); 2417c478bd9Sstevel@tonic-gate 2427c478bd9Sstevel@tonic-gate /* 2437c478bd9Sstevel@tonic-gate * Return symbol found. 2447c478bd9Sstevel@tonic-gate */ 2457c478bd9Sstevel@tonic-gate return (sav->sav_symdesc); 2467c478bd9Sstevel@tonic-gate } 2477c478bd9Sstevel@tonic-gate 2487c478bd9Sstevel@tonic-gate 2497c478bd9Sstevel@tonic-gate /* 2507c478bd9Sstevel@tonic-gate * Enter a new symbol into the link editors internal symbol table. 2517c478bd9Sstevel@tonic-gate * If the symbol is from an input file, information regarding the input file 2527c478bd9Sstevel@tonic-gate * and input section is also recorded. Otherwise (file == NULL) the symbol 2537c478bd9Sstevel@tonic-gate * has been internally generated (ie. _etext, _edata, etc.). 2547c478bd9Sstevel@tonic-gate */ 2557c478bd9Sstevel@tonic-gate Sym_desc * 2567c478bd9Sstevel@tonic-gate sym_enter(const char *name, Sym *osym, Word hash, Ifl_desc *ifl, Ofl_desc *ofl, 2577c478bd9Sstevel@tonic-gate Word ndx, Word shndx, Word sdflags, Half sdflags1, avl_index_t *where) 2587c478bd9Sstevel@tonic-gate { 2597c478bd9Sstevel@tonic-gate Sym_desc *sdp; 2607c478bd9Sstevel@tonic-gate Sym_aux *sap; 2617c478bd9Sstevel@tonic-gate Sym_avlnode *savl; 2627c478bd9Sstevel@tonic-gate char *_name; 2637c478bd9Sstevel@tonic-gate Sym *nsym; 2647c478bd9Sstevel@tonic-gate Half etype; 2657c478bd9Sstevel@tonic-gate Ehdr *ehdr; 2667c478bd9Sstevel@tonic-gate avl_index_t _where; 2677c478bd9Sstevel@tonic-gate 2687c478bd9Sstevel@tonic-gate /* 2697c478bd9Sstevel@tonic-gate * Establish the file type. 2707c478bd9Sstevel@tonic-gate */ 2717c478bd9Sstevel@tonic-gate if (ifl) 2727c478bd9Sstevel@tonic-gate etype = ifl->ifl_ehdr->e_type; 2737c478bd9Sstevel@tonic-gate else 2747c478bd9Sstevel@tonic-gate etype = ET_NONE; 2757c478bd9Sstevel@tonic-gate 2767c478bd9Sstevel@tonic-gate ofl->ofl_entercnt++; 2777c478bd9Sstevel@tonic-gate 2787c478bd9Sstevel@tonic-gate /* 2797c478bd9Sstevel@tonic-gate * Allocate a Sym Descriptor, Auxiliary Descriptor, and a Sym AVLNode - 2807c478bd9Sstevel@tonic-gate * contiguously. 2817c478bd9Sstevel@tonic-gate */ 2827c478bd9Sstevel@tonic-gate if ((savl = libld_calloc(sizeof (Sym_avlnode) + sizeof (Sym_desc) + 2837c478bd9Sstevel@tonic-gate sizeof (Sym_aux), 1)) == 0) 2847c478bd9Sstevel@tonic-gate return ((Sym_desc *)S_ERROR); 2857c478bd9Sstevel@tonic-gate sdp = (Sym_desc *)((uintptr_t)savl + sizeof (Sym_avlnode)); 2867c478bd9Sstevel@tonic-gate sap = (Sym_aux *)((uintptr_t)sdp + sizeof (Sym_desc)); 2877c478bd9Sstevel@tonic-gate 2887c478bd9Sstevel@tonic-gate savl->sav_symdesc = sdp; 2897c478bd9Sstevel@tonic-gate sdp->sd_file = ifl; 2907c478bd9Sstevel@tonic-gate sdp->sd_aux = sap; 2917c478bd9Sstevel@tonic-gate savl->sav_hash = sap->sa_hash = hash; 2927c478bd9Sstevel@tonic-gate 2937c478bd9Sstevel@tonic-gate 2947c478bd9Sstevel@tonic-gate /* 2957c478bd9Sstevel@tonic-gate * Copy the symbol table entry from the input file into the internal 2967c478bd9Sstevel@tonic-gate * entry and have the symbol descriptor use it. 2977c478bd9Sstevel@tonic-gate */ 2987c478bd9Sstevel@tonic-gate sdp->sd_sym = nsym = &sap->sa_sym; 2997c478bd9Sstevel@tonic-gate *nsym = *osym; 3007c478bd9Sstevel@tonic-gate sdp->sd_shndx = shndx; 3017c478bd9Sstevel@tonic-gate sdp->sd_flags |= sdflags; 3027c478bd9Sstevel@tonic-gate sdp->sd_flags1 |= sdflags1; 3037c478bd9Sstevel@tonic-gate 3047c478bd9Sstevel@tonic-gate if ((_name = libld_malloc(strlen(name) + 1)) == 0) 3057c478bd9Sstevel@tonic-gate return ((Sym_desc *)S_ERROR); 3067c478bd9Sstevel@tonic-gate savl->sav_name = sdp->sd_name = (const char *)strcpy(_name, name); 3077c478bd9Sstevel@tonic-gate 3087c478bd9Sstevel@tonic-gate /* 3097c478bd9Sstevel@tonic-gate * Enter Symbol in AVL tree. 3107c478bd9Sstevel@tonic-gate */ 3117c478bd9Sstevel@tonic-gate if (where == 0) { 3127c478bd9Sstevel@tonic-gate /* LINTED */ 3137c478bd9Sstevel@tonic-gate Sym_avlnode *_savl; 3147c478bd9Sstevel@tonic-gate /* 3157c478bd9Sstevel@tonic-gate * If a previous sym_find() hasn't initialized 'where' do it 3167c478bd9Sstevel@tonic-gate * now. 3177c478bd9Sstevel@tonic-gate */ 3187c478bd9Sstevel@tonic-gate where = &_where; 3197c478bd9Sstevel@tonic-gate _savl = avl_find(&ofl->ofl_symavl, savl, where); 3207c478bd9Sstevel@tonic-gate assert(_savl == 0); 3217c478bd9Sstevel@tonic-gate } 3227c478bd9Sstevel@tonic-gate avl_insert(&ofl->ofl_symavl, savl, *where); 3237c478bd9Sstevel@tonic-gate 3247c478bd9Sstevel@tonic-gate /* 3257c478bd9Sstevel@tonic-gate * Record the section index. This is possible because the 3267c478bd9Sstevel@tonic-gate * `ifl_isdesc' table is filled before we start symbol processing. 3277c478bd9Sstevel@tonic-gate */ 3287c478bd9Sstevel@tonic-gate if ((sdflags & FLG_SY_SPECSEC) || (shndx == SHN_UNDEF)) 3297c478bd9Sstevel@tonic-gate sdp->sd_isc = NULL; 3307c478bd9Sstevel@tonic-gate else { 3317c478bd9Sstevel@tonic-gate sdp->sd_isc = ifl->ifl_isdesc[shndx]; 3327c478bd9Sstevel@tonic-gate 3337c478bd9Sstevel@tonic-gate /* 3347c478bd9Sstevel@tonic-gate * If this symbol is from a relocatable object, make sure that 3357c478bd9Sstevel@tonic-gate * it is still associated with a section. For example, an 3367c478bd9Sstevel@tonic-gate * unknown section type (SHT_NULL) would have been rejected on 3377c478bd9Sstevel@tonic-gate * input with a warning. Here, we make the use of the symbol 3387c478bd9Sstevel@tonic-gate * fatal. A symbol descriptor is still returned, so that the 3397c478bd9Sstevel@tonic-gate * caller can continue processing all symbols, and hence flush 3407c478bd9Sstevel@tonic-gate * out as many error conditions as possible. 3417c478bd9Sstevel@tonic-gate */ 3427c478bd9Sstevel@tonic-gate if ((etype == ET_REL) && (sdp->sd_isc == 0)) { 3437c478bd9Sstevel@tonic-gate eprintf(ERR_FATAL, MSG_INTL(MSG_SYM_INVSEC), name, 3447c478bd9Sstevel@tonic-gate ifl->ifl_name, EC_XWORD(shndx)); 3457c478bd9Sstevel@tonic-gate ofl->ofl_flags |= FLG_OF_FATAL; 3467c478bd9Sstevel@tonic-gate return (sdp); 3477c478bd9Sstevel@tonic-gate } 3487c478bd9Sstevel@tonic-gate } 3497c478bd9Sstevel@tonic-gate 3507c478bd9Sstevel@tonic-gate /* 3517c478bd9Sstevel@tonic-gate * Mark any COMMON symbols as 'tentative'. 3527c478bd9Sstevel@tonic-gate */ 353*54d82594Sseizo if (sdflags & FLG_SY_SPECSEC) { 354*54d82594Sseizo if (shndx == SHN_COMMON) 355*54d82594Sseizo sdp->sd_flags |= FLG_SY_TENTSYM; 356*54d82594Sseizo #if (defined(__i386) || defined(__amd64)) && defined(_ELF64) 357*54d82594Sseizo else if (shndx == SHN_X86_64_LCOMMON) 358*54d82594Sseizo sdp->sd_flags |= FLG_SY_TENTSYM; 359*54d82594Sseizo #endif 360*54d82594Sseizo } 3617c478bd9Sstevel@tonic-gate 3627c478bd9Sstevel@tonic-gate /* 3637c478bd9Sstevel@tonic-gate * Establish the symbols reference & visibility. 3647c478bd9Sstevel@tonic-gate */ 3657c478bd9Sstevel@tonic-gate if ((etype == ET_NONE) || (etype == ET_REL)) { 3667c478bd9Sstevel@tonic-gate sdp->sd_ref = REF_REL_NEED; 3677c478bd9Sstevel@tonic-gate 3687c478bd9Sstevel@tonic-gate /* 3697c478bd9Sstevel@tonic-gate * Under -Bnodirect, all exported interfaces are tagged to 3707c478bd9Sstevel@tonic-gate * prevent direct binding to them. 3717c478bd9Sstevel@tonic-gate */ 3727c478bd9Sstevel@tonic-gate if ((ofl->ofl_flags1 & FLG_OF1_ALNODIR) && (shndx != SHN_UNDEF)) 3737c478bd9Sstevel@tonic-gate sdp->sd_flags1 |= FLG_SY1_NDIR; 3747c478bd9Sstevel@tonic-gate 3757c478bd9Sstevel@tonic-gate } else { 3767c478bd9Sstevel@tonic-gate sdp->sd_ref = REF_DYN_SEEN; 3777c478bd9Sstevel@tonic-gate 3787c478bd9Sstevel@tonic-gate /* 3797c478bd9Sstevel@tonic-gate * Record the binding file for this symbol in the sa_bindto 3807c478bd9Sstevel@tonic-gate * field. If this symbol is ever overridden by a REF_REL_NEED 3817c478bd9Sstevel@tonic-gate * definition, sa_bindto is used when building a 'translator'. 3827c478bd9Sstevel@tonic-gate */ 3837c478bd9Sstevel@tonic-gate if (shndx != SHN_UNDEF) 3847c478bd9Sstevel@tonic-gate sdp->sd_aux->sa_bindto = ifl; 3857c478bd9Sstevel@tonic-gate 3867c478bd9Sstevel@tonic-gate /* 3877c478bd9Sstevel@tonic-gate * If this is a protected symbol, mark it. 3887c478bd9Sstevel@tonic-gate */ 3897c478bd9Sstevel@tonic-gate if (ELF_ST_VISIBILITY(nsym->st_other) == STV_PROTECTED) 3907c478bd9Sstevel@tonic-gate sdp->sd_flags |= FLG_SY_PROT; 3917c478bd9Sstevel@tonic-gate 3927c478bd9Sstevel@tonic-gate /* 3937c478bd9Sstevel@tonic-gate * Mask out any visibility info from a DYN symbol. 3947c478bd9Sstevel@tonic-gate */ 3957c478bd9Sstevel@tonic-gate nsym->st_other = nsym->st_other & ~MSK_SYM_VISIBILITY; 3967c478bd9Sstevel@tonic-gate 3977c478bd9Sstevel@tonic-gate /* 3987c478bd9Sstevel@tonic-gate * If the new symbol is from a shared library and it 3997c478bd9Sstevel@tonic-gate * is associated with a SHT_NOBITS section then this 4007c478bd9Sstevel@tonic-gate * symbol originated from a tentative symbol. 4017c478bd9Sstevel@tonic-gate */ 4027c478bd9Sstevel@tonic-gate if (sdp->sd_isc && 4037c478bd9Sstevel@tonic-gate (sdp->sd_isc->is_shdr->sh_type == SHT_NOBITS)) 4047c478bd9Sstevel@tonic-gate sdp->sd_flags |= FLG_SY_TENTSYM; 4057c478bd9Sstevel@tonic-gate } 4067c478bd9Sstevel@tonic-gate 4077c478bd9Sstevel@tonic-gate /* 4087c478bd9Sstevel@tonic-gate * Reclassify any SHN_SUNW_IGNORE symbols to SHN_UNDEF so as to 4097c478bd9Sstevel@tonic-gate * simplify fucture processing. 4107c478bd9Sstevel@tonic-gate */ 4117c478bd9Sstevel@tonic-gate if (shndx == SHN_SUNW_IGNORE) { 4127c478bd9Sstevel@tonic-gate sdp->sd_shndx = shndx = SHN_UNDEF; 4137c478bd9Sstevel@tonic-gate sdp->sd_flags |= FLG_SY_REDUCED; 4147c478bd9Sstevel@tonic-gate sdp->sd_flags1 |= 4157c478bd9Sstevel@tonic-gate (FLG_SY1_IGNORE | FLG_SY1_LOCL | FLG_SY1_ELIM); 4167c478bd9Sstevel@tonic-gate } 4177c478bd9Sstevel@tonic-gate 4187c478bd9Sstevel@tonic-gate /* 4197c478bd9Sstevel@tonic-gate * If this is an undefined, or common symbol from a relocatable object 4207c478bd9Sstevel@tonic-gate * determine whether it is a global or weak reference (see build_osym(), 4217c478bd9Sstevel@tonic-gate * where REF_DYN_NEED definitions are returned back to undefines). 4227c478bd9Sstevel@tonic-gate */ 423*54d82594Sseizo if ((etype == ET_REL) && 424*54d82594Sseizo (ELF_ST_BIND(nsym->st_info) == STB_GLOBAL) && 425*54d82594Sseizo ((shndx == SHN_UNDEF) || ((sdflags & FLG_SY_SPECSEC) && 426*54d82594Sseizo #if (defined(__i386) || defined(__amd64)) && defined(_ELF64) 427*54d82594Sseizo ((shndx == SHN_COMMON) || (shndx == SHN_X86_64_LCOMMON))))) 428*54d82594Sseizo #else 429*54d82594Sseizo (shndx == SHN_COMMON)))) 430*54d82594Sseizo #endif 4317c478bd9Sstevel@tonic-gate sdp->sd_flags |= FLG_SY_GLOBREF; 4327c478bd9Sstevel@tonic-gate 4337c478bd9Sstevel@tonic-gate /* 4347c478bd9Sstevel@tonic-gate * Record the input filename on the referenced or defined files list 4357c478bd9Sstevel@tonic-gate * for possible later diagnostics. The `sa_rfile' pointer contains the 4367c478bd9Sstevel@tonic-gate * name of the file that first referenced this symbol and is used to 4377c478bd9Sstevel@tonic-gate * generate undefined symbol diagnostics (refer to sym_undef_entry()). 4387c478bd9Sstevel@tonic-gate * Note that this entry can be overridden if a reference from a 4397c478bd9Sstevel@tonic-gate * relocatable object is found after a reference from a shared object 4407c478bd9Sstevel@tonic-gate * (refer to sym_override()). 4417c478bd9Sstevel@tonic-gate * The `sa_dfiles' list is used to maintain the list of files that 4427c478bd9Sstevel@tonic-gate * define the same symbol. This list can be used for two reasons: 4437c478bd9Sstevel@tonic-gate * 4447c478bd9Sstevel@tonic-gate * o To save the first definition of a symbol that is not available 4457c478bd9Sstevel@tonic-gate * for this link-edit. 4467c478bd9Sstevel@tonic-gate * 4477c478bd9Sstevel@tonic-gate * o To save all definitions of a symbol when the -m option is in 4487c478bd9Sstevel@tonic-gate * effect. This is optional as it is used to list multiple 4497c478bd9Sstevel@tonic-gate * (interposed) definitions of a symbol (refer to ldmap_out()), 4507c478bd9Sstevel@tonic-gate * and can be quite expensive. 4517c478bd9Sstevel@tonic-gate */ 4527c478bd9Sstevel@tonic-gate if (shndx == SHN_UNDEF) { 4537c478bd9Sstevel@tonic-gate sap->sa_rfile = ifl->ifl_name; 4547c478bd9Sstevel@tonic-gate } else { 4557c478bd9Sstevel@tonic-gate if (sdp->sd_ref == REF_DYN_SEEN) { 4567c478bd9Sstevel@tonic-gate /* 4577c478bd9Sstevel@tonic-gate * A symbol is determined to be unavailable if it 4587c478bd9Sstevel@tonic-gate * belongs to a version of a shared object that this 4597c478bd9Sstevel@tonic-gate * user does not wish to use, or if it belongs to an 4607c478bd9Sstevel@tonic-gate * implicit shared object. 4617c478bd9Sstevel@tonic-gate */ 4627c478bd9Sstevel@tonic-gate if (ifl->ifl_vercnt) { 4637c478bd9Sstevel@tonic-gate Ver_index * vip; 4647c478bd9Sstevel@tonic-gate Half vndx = ifl->ifl_versym[ndx]; 4657c478bd9Sstevel@tonic-gate 4667c478bd9Sstevel@tonic-gate sap->sa_dverndx = vndx; 4677c478bd9Sstevel@tonic-gate vip = &ifl->ifl_verndx[vndx]; 4687c478bd9Sstevel@tonic-gate if (!(vip->vi_flags & FLG_VER_AVAIL)) { 4697c478bd9Sstevel@tonic-gate sdp->sd_flags |= FLG_SY_NOTAVAIL; 4707c478bd9Sstevel@tonic-gate sap->sa_vfile = ifl->ifl_name; 4717c478bd9Sstevel@tonic-gate } 4727c478bd9Sstevel@tonic-gate } 4737c478bd9Sstevel@tonic-gate if (!(ifl->ifl_flags & FLG_IF_NEEDED)) 4747c478bd9Sstevel@tonic-gate sdp->sd_flags |= FLG_SY_NOTAVAIL; 4757c478bd9Sstevel@tonic-gate 4767c478bd9Sstevel@tonic-gate } else if (etype == ET_REL) { 4777c478bd9Sstevel@tonic-gate /* 4787c478bd9Sstevel@tonic-gate * If this symbol has been obtained from a versioned 4797c478bd9Sstevel@tonic-gate * input relocatable object then the new symbol must be 4807c478bd9Sstevel@tonic-gate * promoted to the versioning of the output file. 4817c478bd9Sstevel@tonic-gate */ 4827c478bd9Sstevel@tonic-gate if (ifl->ifl_versym) 4837c478bd9Sstevel@tonic-gate vers_promote(sdp, ndx, ifl, ofl); 4847c478bd9Sstevel@tonic-gate } 4857c478bd9Sstevel@tonic-gate 4867c478bd9Sstevel@tonic-gate if ((ofl->ofl_flags & FLG_OF_GENMAP) && 4877c478bd9Sstevel@tonic-gate ((sdflags & FLG_SY_SPECSEC) == 0)) 4887c478bd9Sstevel@tonic-gate if (list_appendc(&sap->sa_dfiles, ifl->ifl_name) == 0) 4897c478bd9Sstevel@tonic-gate return ((Sym_desc *)S_ERROR); 4907c478bd9Sstevel@tonic-gate } 4917c478bd9Sstevel@tonic-gate 4927c478bd9Sstevel@tonic-gate if (sdp->sd_file) 4937c478bd9Sstevel@tonic-gate ehdr = sdp->sd_file->ifl_ehdr; 4947c478bd9Sstevel@tonic-gate else 4957c478bd9Sstevel@tonic-gate ehdr = &def_ehdr; 4967c478bd9Sstevel@tonic-gate DBG_CALL(Dbg_syms_entered(ehdr, nsym, sdp)); 4977c478bd9Sstevel@tonic-gate 4987c478bd9Sstevel@tonic-gate return (sdp); 4997c478bd9Sstevel@tonic-gate } 5007c478bd9Sstevel@tonic-gate 5017c478bd9Sstevel@tonic-gate /* 5027c478bd9Sstevel@tonic-gate * Add a special symbol to the symbol table. Takes special symbol name with 5037c478bd9Sstevel@tonic-gate * and without underscores. This routine is called, after all other symbol 5047c478bd9Sstevel@tonic-gate * resolution has completed, to generate a reserved absolute symbol (the 5057c478bd9Sstevel@tonic-gate * underscore version). Special symbols are updated with the appropriate 506dd94ecefSrie * values in update_osym(). If the user has already defined this symbol 5077c478bd9Sstevel@tonic-gate * issue a warning and leave the symbol as is. If the non-underscore symbol 5087c478bd9Sstevel@tonic-gate * is referenced then turn it into a weak alias of the underscored symbol. 5097c478bd9Sstevel@tonic-gate * 5107c478bd9Sstevel@tonic-gate * If this is a global symbol, and it hasn't explicitly been defined as being 5117c478bd9Sstevel@tonic-gate * directly bound to, indicate that it can't be directly bound to. 5127c478bd9Sstevel@tonic-gate * Historically, most special symbols only have meaning to the object in which 5137c478bd9Sstevel@tonic-gate * they exist, however, they've always been global. To insure compatibility 5147c478bd9Sstevel@tonic-gate * with any unexpected use presently in effect, insure these symbols don't get 5157c478bd9Sstevel@tonic-gate * directly bound to. Note, that establishing this state here isn't sufficient 5167c478bd9Sstevel@tonic-gate * to create a syminfo table, only if a syminfo table is being created by some 5177c478bd9Sstevel@tonic-gate * other symbol directives will the nodirect binding be recorded. This insures 5187c478bd9Sstevel@tonic-gate * we don't create syminfo sections for all objects we create, as this might add 5197c478bd9Sstevel@tonic-gate * unnecessary bloat to users who haven't explicitly requested extra symbol 5207c478bd9Sstevel@tonic-gate * information. 5217c478bd9Sstevel@tonic-gate */ 5227c478bd9Sstevel@tonic-gate static uintptr_t 5237c478bd9Sstevel@tonic-gate sym_add_spec(const char *name, const char *uname, Word sdaux_id, 5247c478bd9Sstevel@tonic-gate Half flags1, Ofl_desc *ofl) 5257c478bd9Sstevel@tonic-gate { 5267c478bd9Sstevel@tonic-gate Sym_desc *sdp; 5277c478bd9Sstevel@tonic-gate Sym_desc *usdp; 5287c478bd9Sstevel@tonic-gate Sym *sym; 5297c478bd9Sstevel@tonic-gate Word hash; 5307c478bd9Sstevel@tonic-gate avl_index_t where; 5317c478bd9Sstevel@tonic-gate 5327c478bd9Sstevel@tonic-gate /* LINTED */ 5337c478bd9Sstevel@tonic-gate hash = (Word)elf_hash(uname); 5347c478bd9Sstevel@tonic-gate if (usdp = sym_find(uname, hash, &where, ofl)) { 5357c478bd9Sstevel@tonic-gate /* 5367c478bd9Sstevel@tonic-gate * If the underscore symbol exists and is undefined, or was 5377c478bd9Sstevel@tonic-gate * defined in a shared library, convert it to a local symbol. 5387c478bd9Sstevel@tonic-gate * Otherwise leave it as is and warn the user. 5397c478bd9Sstevel@tonic-gate */ 5407c478bd9Sstevel@tonic-gate if ((usdp->sd_shndx == SHN_UNDEF) || 5417c478bd9Sstevel@tonic-gate (usdp->sd_ref != REF_REL_NEED)) { 5427c478bd9Sstevel@tonic-gate usdp->sd_ref = REF_REL_NEED; 5437c478bd9Sstevel@tonic-gate usdp->sd_shndx = usdp->sd_sym->st_shndx = SHN_ABS; 5447c478bd9Sstevel@tonic-gate usdp->sd_flags |= FLG_SY_SPECSEC; 5457c478bd9Sstevel@tonic-gate usdp->sd_sym->st_info = 5467c478bd9Sstevel@tonic-gate ELF_ST_INFO(STB_GLOBAL, STT_OBJECT); 5477c478bd9Sstevel@tonic-gate usdp->sd_isc = NULL; 5487c478bd9Sstevel@tonic-gate usdp->sd_sym->st_size = 0; 5497c478bd9Sstevel@tonic-gate usdp->sd_sym->st_value = 0; 5507c478bd9Sstevel@tonic-gate /* LINTED */ 5517c478bd9Sstevel@tonic-gate usdp->sd_aux->sa_symspec = (Half)sdaux_id; 5527c478bd9Sstevel@tonic-gate 5537c478bd9Sstevel@tonic-gate /* 5547c478bd9Sstevel@tonic-gate * If a user hasn't specifically indicated the scope of 5557c478bd9Sstevel@tonic-gate * this symbol be made local then leave it as global 5567c478bd9Sstevel@tonic-gate * (ie. prevent automatic scoping). 5577c478bd9Sstevel@tonic-gate */ 5587c478bd9Sstevel@tonic-gate if (!(usdp->sd_flags1 & FLG_SY1_LOCL) && 5597c478bd9Sstevel@tonic-gate (flags1 & FLG_SY1_GLOB)) { 5607c478bd9Sstevel@tonic-gate usdp->sd_aux->sa_overndx = VER_NDX_GLOBAL; 5617c478bd9Sstevel@tonic-gate if ((usdp->sd_flags1 & FLG_SY1_DIR) == 0) 5627c478bd9Sstevel@tonic-gate usdp->sd_flags1 |= FLG_SY1_NDIR; 5637c478bd9Sstevel@tonic-gate } 5647c478bd9Sstevel@tonic-gate usdp->sd_flags1 |= flags1; 5657c478bd9Sstevel@tonic-gate 5667c478bd9Sstevel@tonic-gate /* 5677c478bd9Sstevel@tonic-gate * If the reference originated from a mapfile insure 5687c478bd9Sstevel@tonic-gate * we mark the symbol as used. 5697c478bd9Sstevel@tonic-gate */ 5707c478bd9Sstevel@tonic-gate if (usdp->sd_flags & FLG_SY_MAPREF) 5717c478bd9Sstevel@tonic-gate usdp->sd_flags |= FLG_SY_MAPUSED; 5727c478bd9Sstevel@tonic-gate 5737c478bd9Sstevel@tonic-gate DBG_CALL(Dbg_syms_updated((ofl->ofl_ehdr) ? 5747c478bd9Sstevel@tonic-gate ofl->ofl_ehdr : &def_ehdr, usdp, uname)); 5757c478bd9Sstevel@tonic-gate } else 5767c478bd9Sstevel@tonic-gate eprintf(ERR_WARNING, MSG_INTL(MSG_SYM_RESERVE), uname, 5777c478bd9Sstevel@tonic-gate usdp->sd_file->ifl_name); 5787c478bd9Sstevel@tonic-gate } else { 5797c478bd9Sstevel@tonic-gate /* 5807c478bd9Sstevel@tonic-gate * If the symbol does not exist create it. 5817c478bd9Sstevel@tonic-gate */ 5827c478bd9Sstevel@tonic-gate if ((sym = libld_calloc(sizeof (Sym), 1)) == 0) 5837c478bd9Sstevel@tonic-gate return (S_ERROR); 5847c478bd9Sstevel@tonic-gate sym->st_shndx = SHN_ABS; 5857c478bd9Sstevel@tonic-gate sym->st_info = ELF_ST_INFO(STB_GLOBAL, STT_OBJECT); 5867c478bd9Sstevel@tonic-gate sym->st_size = 0; 5877c478bd9Sstevel@tonic-gate sym->st_value = 0; 5887c478bd9Sstevel@tonic-gate DBG_CALL(Dbg_syms_created(uname)); 5897c478bd9Sstevel@tonic-gate if ((usdp = sym_enter(uname, sym, hash, (Ifl_desc *)NULL, 5907c478bd9Sstevel@tonic-gate ofl, 0, SHN_ABS, FLG_SY_SPECSEC, 0, &where)) == 5917c478bd9Sstevel@tonic-gate (Sym_desc *)S_ERROR) 5927c478bd9Sstevel@tonic-gate return (S_ERROR); 5937c478bd9Sstevel@tonic-gate usdp->sd_ref = REF_REL_NEED; 5947c478bd9Sstevel@tonic-gate /* LINTED */ 5957c478bd9Sstevel@tonic-gate usdp->sd_aux->sa_symspec = (Half)sdaux_id; 5967c478bd9Sstevel@tonic-gate 5977c478bd9Sstevel@tonic-gate usdp->sd_aux->sa_overndx = VER_NDX_GLOBAL; 5987c478bd9Sstevel@tonic-gate if (flags1 & FLG_SY1_GLOB) 5997c478bd9Sstevel@tonic-gate usdp->sd_flags1 |= FLG_SY1_NDIR; 6007c478bd9Sstevel@tonic-gate usdp->sd_flags1 |= flags1; 6017c478bd9Sstevel@tonic-gate } 6027c478bd9Sstevel@tonic-gate 6037c478bd9Sstevel@tonic-gate if (name && (sdp = sym_find(name, SYM_NOHASH, 0, ofl)) && 6047c478bd9Sstevel@tonic-gate (sdp->sd_shndx == SHN_UNDEF)) { 6057c478bd9Sstevel@tonic-gate uchar_t bind; 6067c478bd9Sstevel@tonic-gate 6077c478bd9Sstevel@tonic-gate /* 6087c478bd9Sstevel@tonic-gate * If the non-underscore symbol exists and is undefined 6097c478bd9Sstevel@tonic-gate * convert it to be a local. If the underscore has 6107c478bd9Sstevel@tonic-gate * sa_symspec set (ie. it was created above) then simulate this 6117c478bd9Sstevel@tonic-gate * as a weak alias. 6127c478bd9Sstevel@tonic-gate */ 6137c478bd9Sstevel@tonic-gate sdp->sd_ref = REF_REL_NEED; 6147c478bd9Sstevel@tonic-gate sdp->sd_shndx = sdp->sd_sym->st_shndx = SHN_ABS; 6157c478bd9Sstevel@tonic-gate sdp->sd_flags |= FLG_SY_SPECSEC; 6167c478bd9Sstevel@tonic-gate sdp->sd_isc = NULL; 6177c478bd9Sstevel@tonic-gate sdp->sd_sym->st_size = 0; 6187c478bd9Sstevel@tonic-gate sdp->sd_sym->st_value = 0; 6197c478bd9Sstevel@tonic-gate /* LINTED */ 6207c478bd9Sstevel@tonic-gate sdp->sd_aux->sa_symspec = (Half)sdaux_id; 6217c478bd9Sstevel@tonic-gate if (usdp->sd_aux->sa_symspec) { 6227c478bd9Sstevel@tonic-gate usdp->sd_aux->sa_linkndx = 0; 6237c478bd9Sstevel@tonic-gate sdp->sd_aux->sa_linkndx = 0; 6247c478bd9Sstevel@tonic-gate bind = STB_WEAK; 6257c478bd9Sstevel@tonic-gate } else 6267c478bd9Sstevel@tonic-gate bind = STB_GLOBAL; 6277c478bd9Sstevel@tonic-gate sdp->sd_sym->st_info = ELF_ST_INFO(bind, STT_OBJECT); 6287c478bd9Sstevel@tonic-gate 6297c478bd9Sstevel@tonic-gate /* 6307c478bd9Sstevel@tonic-gate * If a user hasn't specifically indicated the scope of 6317c478bd9Sstevel@tonic-gate * this symbol be made local then leave it as global 6327c478bd9Sstevel@tonic-gate * (ie. prevent automatic scoping). 6337c478bd9Sstevel@tonic-gate */ 6347c478bd9Sstevel@tonic-gate if (!(sdp->sd_flags1 & FLG_SY1_LOCL) && 6357c478bd9Sstevel@tonic-gate (flags1 & FLG_SY1_GLOB)) { 6367c478bd9Sstevel@tonic-gate sdp->sd_aux->sa_overndx = VER_NDX_GLOBAL; 6377c478bd9Sstevel@tonic-gate if ((sdp->sd_flags1 & FLG_SY1_DIR) == 0) 6387c478bd9Sstevel@tonic-gate sdp->sd_flags1 |= FLG_SY1_NDIR; 6397c478bd9Sstevel@tonic-gate } 6407c478bd9Sstevel@tonic-gate sdp->sd_flags1 |= flags1; 6417c478bd9Sstevel@tonic-gate 6427c478bd9Sstevel@tonic-gate /* 6437c478bd9Sstevel@tonic-gate * If the reference originated from a mapfile insure 6447c478bd9Sstevel@tonic-gate * we mark the symbol as used. 6457c478bd9Sstevel@tonic-gate */ 6467c478bd9Sstevel@tonic-gate if (sdp->sd_flags & FLG_SY_MAPREF) 6477c478bd9Sstevel@tonic-gate sdp->sd_flags |= FLG_SY_MAPUSED; 6487c478bd9Sstevel@tonic-gate 6497c478bd9Sstevel@tonic-gate DBG_CALL(Dbg_syms_updated((ofl->ofl_ehdr) ? ofl->ofl_ehdr : 6507c478bd9Sstevel@tonic-gate &def_ehdr, sdp, name)); 6517c478bd9Sstevel@tonic-gate } 6527c478bd9Sstevel@tonic-gate return (1); 6537c478bd9Sstevel@tonic-gate } 6547c478bd9Sstevel@tonic-gate 6557c478bd9Sstevel@tonic-gate 6567c478bd9Sstevel@tonic-gate /* 6577c478bd9Sstevel@tonic-gate * Print undefined symbols. 6587c478bd9Sstevel@tonic-gate */ 6597c478bd9Sstevel@tonic-gate static Boolean undef_title = TRUE; 6607c478bd9Sstevel@tonic-gate 6617c478bd9Sstevel@tonic-gate void 6627c478bd9Sstevel@tonic-gate sym_undef_title() 6637c478bd9Sstevel@tonic-gate { 6647c478bd9Sstevel@tonic-gate eprintf(ERR_NONE, MSG_INTL(MSG_SYM_FMT_UNDEF), 6657c478bd9Sstevel@tonic-gate MSG_INTL(MSG_SYM_UNDEF_ITM_11), 6667c478bd9Sstevel@tonic-gate MSG_INTL(MSG_SYM_UNDEF_ITM_21), 6677c478bd9Sstevel@tonic-gate MSG_INTL(MSG_SYM_UNDEF_ITM_12), 6687c478bd9Sstevel@tonic-gate MSG_INTL(MSG_SYM_UNDEF_ITM_22)); 6697c478bd9Sstevel@tonic-gate 6707c478bd9Sstevel@tonic-gate undef_title = FALSE; 6717c478bd9Sstevel@tonic-gate } 6727c478bd9Sstevel@tonic-gate 6737c478bd9Sstevel@tonic-gate /* 6747c478bd9Sstevel@tonic-gate * Undefined symbols can fall into one of four types: 6757c478bd9Sstevel@tonic-gate * 6767c478bd9Sstevel@tonic-gate * o the symbol is really undefined (SHN_UNDEF). 6777c478bd9Sstevel@tonic-gate * 6787c478bd9Sstevel@tonic-gate * o versioning has been enabled, however this symbol has not been assigned 6797c478bd9Sstevel@tonic-gate * to one of the defined versions. 6807c478bd9Sstevel@tonic-gate * 6817c478bd9Sstevel@tonic-gate * o the symbol has been defined by an implicitly supplied library, ie. one 6827c478bd9Sstevel@tonic-gate * which was encounted because it was NEEDED by another library, rather 6837c478bd9Sstevel@tonic-gate * than from a command line supplied library which would become the only 6847c478bd9Sstevel@tonic-gate * dependency of the output file being produced. 6857c478bd9Sstevel@tonic-gate * 6867c478bd9Sstevel@tonic-gate * o the symbol has been defined by a version of a shared object that is 6877c478bd9Sstevel@tonic-gate * not permitted for this link-edit. 6887c478bd9Sstevel@tonic-gate * 6897c478bd9Sstevel@tonic-gate * In all cases the file who made the first reference to this symbol will have 6907c478bd9Sstevel@tonic-gate * been recorded via the `sa_rfile' pointer. 6917c478bd9Sstevel@tonic-gate */ 6927c478bd9Sstevel@tonic-gate typedef enum { 6937c478bd9Sstevel@tonic-gate UNDEF, NOVERSION, IMPLICIT, NOTAVAIL, 6947c478bd9Sstevel@tonic-gate BNDLOCAL 6957c478bd9Sstevel@tonic-gate } Type; 6967c478bd9Sstevel@tonic-gate 6977c478bd9Sstevel@tonic-gate static const Msg format[] = { 6987c478bd9Sstevel@tonic-gate MSG_SYM_UND_UNDEF, /* MSG_INTL(MSG_SYM_UND_UNDEF) */ 6997c478bd9Sstevel@tonic-gate MSG_SYM_UND_NOVER, /* MSG_INTL(MSG_SYM_UND_NOVER) */ 7007c478bd9Sstevel@tonic-gate MSG_SYM_UND_IMPL, /* MSG_INTL(MSG_SYM_UND_IMPL) */ 7017c478bd9Sstevel@tonic-gate MSG_SYM_UND_NOTA, /* MSG_INTL(MSG_SYM_UND_NOTA) */ 7027c478bd9Sstevel@tonic-gate MSG_SYM_UND_BNDLOCAL /* MSG_INTL(MSG_SYM_UND_BNDLOCAL) */ 7037c478bd9Sstevel@tonic-gate }; 7047c478bd9Sstevel@tonic-gate 7057c478bd9Sstevel@tonic-gate void 7067c478bd9Sstevel@tonic-gate sym_undef_entry(Sym_desc *sdp, Type type) 7077c478bd9Sstevel@tonic-gate { 7087c478bd9Sstevel@tonic-gate const char *name1, *name2, *name3; 7097c478bd9Sstevel@tonic-gate Ifl_desc *ifl = sdp->sd_file; 7107c478bd9Sstevel@tonic-gate Sym_aux *sap = sdp->sd_aux; 7117c478bd9Sstevel@tonic-gate 7127c478bd9Sstevel@tonic-gate if (undef_title) 7137c478bd9Sstevel@tonic-gate sym_undef_title(); 7147c478bd9Sstevel@tonic-gate 7157c478bd9Sstevel@tonic-gate switch (type) { 7167c478bd9Sstevel@tonic-gate case UNDEF: 7177c478bd9Sstevel@tonic-gate case BNDLOCAL: 7187c478bd9Sstevel@tonic-gate name1 = sap->sa_rfile; 7197c478bd9Sstevel@tonic-gate break; 7207c478bd9Sstevel@tonic-gate case NOVERSION: 7217c478bd9Sstevel@tonic-gate name1 = ifl->ifl_name; 7227c478bd9Sstevel@tonic-gate break; 7237c478bd9Sstevel@tonic-gate case IMPLICIT: 7247c478bd9Sstevel@tonic-gate name1 = sap->sa_rfile; 7257c478bd9Sstevel@tonic-gate name2 = ifl->ifl_name; 7267c478bd9Sstevel@tonic-gate break; 7277c478bd9Sstevel@tonic-gate case NOTAVAIL: 7287c478bd9Sstevel@tonic-gate name1 = sap->sa_rfile; 7297c478bd9Sstevel@tonic-gate name2 = sap->sa_vfile; 7307c478bd9Sstevel@tonic-gate name3 = ifl->ifl_verndx[sap->sa_dverndx].vi_name; 7317c478bd9Sstevel@tonic-gate break; 7327c478bd9Sstevel@tonic-gate default: 7337c478bd9Sstevel@tonic-gate return; 7347c478bd9Sstevel@tonic-gate } 7357c478bd9Sstevel@tonic-gate 7367c478bd9Sstevel@tonic-gate eprintf(ERR_NONE, MSG_INTL(format[type]), demangle(sdp->sd_name), 7377c478bd9Sstevel@tonic-gate name1, name2, name3); 7387c478bd9Sstevel@tonic-gate } 7397c478bd9Sstevel@tonic-gate 7407c478bd9Sstevel@tonic-gate /* 7417c478bd9Sstevel@tonic-gate * At this point all symbol input processing has been completed, therefore 7427c478bd9Sstevel@tonic-gate * complete the symbol table entries by generating any necessary internal 7437c478bd9Sstevel@tonic-gate * symbols. 7447c478bd9Sstevel@tonic-gate */ 7457c478bd9Sstevel@tonic-gate uintptr_t 7467c478bd9Sstevel@tonic-gate sym_spec(Ofl_desc *ofl) 7477c478bd9Sstevel@tonic-gate { 7487c478bd9Sstevel@tonic-gate Word flags = ofl->ofl_flags; 7497c478bd9Sstevel@tonic-gate 7507c478bd9Sstevel@tonic-gate if (!(flags & FLG_OF_RELOBJ)) { 7517c478bd9Sstevel@tonic-gate 7527c478bd9Sstevel@tonic-gate DBG_CALL(Dbg_syms_spec_title()); 7537c478bd9Sstevel@tonic-gate 7547c478bd9Sstevel@tonic-gate if (sym_add_spec(MSG_ORIG(MSG_SYM_ETEXT), 7557c478bd9Sstevel@tonic-gate MSG_ORIG(MSG_SYM_ETEXT_U), SDAUX_ID_ETEXT, 7567c478bd9Sstevel@tonic-gate FLG_SY1_GLOB, ofl) == S_ERROR) 7577c478bd9Sstevel@tonic-gate return (S_ERROR); 7587c478bd9Sstevel@tonic-gate if (sym_add_spec(MSG_ORIG(MSG_SYM_EDATA), 7597c478bd9Sstevel@tonic-gate MSG_ORIG(MSG_SYM_EDATA_U), SDAUX_ID_EDATA, 7607c478bd9Sstevel@tonic-gate FLG_SY1_GLOB, ofl) == S_ERROR) 7617c478bd9Sstevel@tonic-gate return (S_ERROR); 7627c478bd9Sstevel@tonic-gate if (sym_add_spec(MSG_ORIG(MSG_SYM_END), 7637c478bd9Sstevel@tonic-gate MSG_ORIG(MSG_SYM_END_U), SDAUX_ID_END, 7647c478bd9Sstevel@tonic-gate FLG_SY1_GLOB, ofl) == S_ERROR) 7657c478bd9Sstevel@tonic-gate return (S_ERROR); 7667c478bd9Sstevel@tonic-gate if (sym_add_spec(MSG_ORIG(MSG_SYM_L_END), 7677c478bd9Sstevel@tonic-gate MSG_ORIG(MSG_SYM_L_END_U), SDAUX_ID_END, 7687c478bd9Sstevel@tonic-gate FLG_SY1_LOCL, ofl) == S_ERROR) 7697c478bd9Sstevel@tonic-gate return (S_ERROR); 7707c478bd9Sstevel@tonic-gate if (sym_add_spec(MSG_ORIG(MSG_SYM_L_START), 7717c478bd9Sstevel@tonic-gate MSG_ORIG(MSG_SYM_L_START_U), SDAUX_ID_START, 7727c478bd9Sstevel@tonic-gate FLG_SY1_LOCL, ofl) == S_ERROR) 7737c478bd9Sstevel@tonic-gate return (S_ERROR); 7747c478bd9Sstevel@tonic-gate 7757c478bd9Sstevel@tonic-gate /* 7767c478bd9Sstevel@tonic-gate * Historically we've always produced a _DYNAMIC symbol, even 7777c478bd9Sstevel@tonic-gate * for static executables (in which case its value will be 0). 7787c478bd9Sstevel@tonic-gate */ 7797c478bd9Sstevel@tonic-gate if (sym_add_spec(MSG_ORIG(MSG_SYM_DYNAMIC), 7807c478bd9Sstevel@tonic-gate MSG_ORIG(MSG_SYM_DYNAMIC_U), SDAUX_ID_DYN, 7817c478bd9Sstevel@tonic-gate FLG_SY1_GLOB, ofl) == S_ERROR) 7827c478bd9Sstevel@tonic-gate return (S_ERROR); 7837c478bd9Sstevel@tonic-gate 7847c478bd9Sstevel@tonic-gate if ((flags & (FLG_OF_DYNAMIC | FLG_OF_RELOBJ)) == 7857c478bd9Sstevel@tonic-gate FLG_OF_DYNAMIC) 7867c478bd9Sstevel@tonic-gate if (sym_add_spec(MSG_ORIG(MSG_SYM_PLKTBL), 7877c478bd9Sstevel@tonic-gate MSG_ORIG(MSG_SYM_PLKTBL_U), SDAUX_ID_PLT, 7887c478bd9Sstevel@tonic-gate FLG_SY1_GLOB, ofl) == S_ERROR) 7897c478bd9Sstevel@tonic-gate return (S_ERROR); 7907c478bd9Sstevel@tonic-gate 7917c478bd9Sstevel@tonic-gate if (sym_find(MSG_ORIG(MSG_SYM_GOFTBL_U), SYM_NOHASH, 0, ofl)) 7927c478bd9Sstevel@tonic-gate if (sym_add_spec(MSG_ORIG(MSG_SYM_GOFTBL), 7937c478bd9Sstevel@tonic-gate MSG_ORIG(MSG_SYM_GOFTBL_U), SDAUX_ID_GOT, 7947c478bd9Sstevel@tonic-gate FLG_SY1_GLOB, ofl) == S_ERROR) 7957c478bd9Sstevel@tonic-gate return (S_ERROR); 7967c478bd9Sstevel@tonic-gate } 7977c478bd9Sstevel@tonic-gate return (1); 7987c478bd9Sstevel@tonic-gate } 7997c478bd9Sstevel@tonic-gate 8007c478bd9Sstevel@tonic-gate /* 8017c478bd9Sstevel@tonic-gate * This routine checks to see if a symbols visibility needs to be reduced to 8027c478bd9Sstevel@tonic-gate * either SYMBOLIC or LOCAL. This routine can be called from either 8037c478bd9Sstevel@tonic-gate * reloc_init() or sym_validate(). 8047c478bd9Sstevel@tonic-gate */ 8057c478bd9Sstevel@tonic-gate void 8067c478bd9Sstevel@tonic-gate sym_adjust_vis(Sym_desc *sdp, Ofl_desc *ofl) 8077c478bd9Sstevel@tonic-gate { 8087c478bd9Sstevel@tonic-gate Word symvis, oflags = ofl->ofl_flags, oflags1 = ofl->ofl_flags1; 8097c478bd9Sstevel@tonic-gate Sym *sym = sdp->sd_sym; 8107c478bd9Sstevel@tonic-gate 8117c478bd9Sstevel@tonic-gate if ((sdp->sd_ref == REF_REL_NEED) && (sdp->sd_shndx != SHN_UNDEF)) { 8127c478bd9Sstevel@tonic-gate /* 8137c478bd9Sstevel@tonic-gate * If scoping is enabled, reduce any nonversioned global 8147c478bd9Sstevel@tonic-gate * symbols (any symbol that has been processed for relocations 8157c478bd9Sstevel@tonic-gate * will have already had this same reduction test applied). 8167c478bd9Sstevel@tonic-gate * Indicate that the symbol has been reduced as it may be 8177c478bd9Sstevel@tonic-gate * necessary to print these symbols later. 8187c478bd9Sstevel@tonic-gate */ 8197c478bd9Sstevel@tonic-gate if (((oflags & FLG_OF_AUTOLCL) || 8207c478bd9Sstevel@tonic-gate (oflags1 & FLG_OF1_AUTOELM)) && 8217c478bd9Sstevel@tonic-gate ((sdp->sd_flags1 & MSK_SY1_DEFINED) == 0)) { 8227c478bd9Sstevel@tonic-gate 8237c478bd9Sstevel@tonic-gate sdp->sd_flags |= FLG_SY_REDUCED; 8247c478bd9Sstevel@tonic-gate sdp->sd_flags1 |= FLG_SY1_LOCL; 8257c478bd9Sstevel@tonic-gate 8267c478bd9Sstevel@tonic-gate if (ELF_ST_VISIBILITY(sym->st_other) != STV_INTERNAL) 8277c478bd9Sstevel@tonic-gate sym->st_other = STV_HIDDEN | 8287c478bd9Sstevel@tonic-gate (sym->st_other & ~MSK_SYM_VISIBILITY); 8297c478bd9Sstevel@tonic-gate 8307c478bd9Sstevel@tonic-gate if (ofl->ofl_flags1 & 8317c478bd9Sstevel@tonic-gate (FLG_OF1_REDLSYM | FLG_OF1_AUTOELM)) 8327c478bd9Sstevel@tonic-gate sdp->sd_flags1 |= FLG_SY1_ELIM; 8337c478bd9Sstevel@tonic-gate } 8347c478bd9Sstevel@tonic-gate 8357c478bd9Sstevel@tonic-gate /* 8367c478bd9Sstevel@tonic-gate * If '-Bsymbolic' is in effect - then bind all global symbols 8377c478bd9Sstevel@tonic-gate * 'symbolically' and assign the STV_PROTECTED visibility 8387c478bd9Sstevel@tonic-gate * attribute. 8397c478bd9Sstevel@tonic-gate */ 8407c478bd9Sstevel@tonic-gate if ((oflags & FLG_OF_SYMBOLIC) && 8417c478bd9Sstevel@tonic-gate ((sdp->sd_flags1 & FLG_SY1_LOCL) == 0)) { 8427c478bd9Sstevel@tonic-gate 8437c478bd9Sstevel@tonic-gate sdp->sd_flags1 |= FLG_SY1_PROT; 8447c478bd9Sstevel@tonic-gate if (ELF_ST_VISIBILITY(sym->st_other) == STV_DEFAULT) 8457c478bd9Sstevel@tonic-gate sym->st_other = STV_PROTECTED | 8467c478bd9Sstevel@tonic-gate (sym->st_other & ~MSK_SYM_VISIBILITY); 8477c478bd9Sstevel@tonic-gate } 8487c478bd9Sstevel@tonic-gate } 8497c478bd9Sstevel@tonic-gate 8507c478bd9Sstevel@tonic-gate /* 8517c478bd9Sstevel@tonic-gate * Check to see if the symbol visibility needs to be adjusted due to any 8527c478bd9Sstevel@tonic-gate * STV_* symbol attributes being set. 8537c478bd9Sstevel@tonic-gate * 8547c478bd9Sstevel@tonic-gate * STV_PROTECTED == symbolic binding 8557c478bd9Sstevel@tonic-gate * STV_INTERNAL == reduce to local 8567c478bd9Sstevel@tonic-gate * STV_HIDDEN == reduce to local 8577c478bd9Sstevel@tonic-gate * 8587c478bd9Sstevel@tonic-gate * Note, UNDEF symbols can be assigned a visibility, thus the refencing 8597c478bd9Sstevel@tonic-gate * code can be dependent on this visibility. Here, by only ignoring 8607c478bd9Sstevel@tonic-gate * REF_DYN_SEEN symbol definitions we can be assigning a visibility to 8617c478bd9Sstevel@tonic-gate * REF_DYN_NEED. If the protected, or local assignment is made to 8627c478bd9Sstevel@tonic-gate * a REF_DYN_NEED symbol, it will be caught later as an illegal 8637c478bd9Sstevel@tonic-gate * visibility. 8647c478bd9Sstevel@tonic-gate */ 8657c478bd9Sstevel@tonic-gate if (!(oflags & FLG_OF_RELOBJ) && (sdp->sd_ref != REF_DYN_SEEN) && 8667c478bd9Sstevel@tonic-gate (symvis = ELF_ST_VISIBILITY(sym->st_other))) { 8677c478bd9Sstevel@tonic-gate if (symvis == STV_PROTECTED) 8687c478bd9Sstevel@tonic-gate sdp->sd_flags1 |= FLG_SY1_PROT; 8697c478bd9Sstevel@tonic-gate else if ((symvis == STV_INTERNAL) || (symvis == STV_HIDDEN)) 8707c478bd9Sstevel@tonic-gate sdp->sd_flags1 |= FLG_SY1_LOCL; 8717c478bd9Sstevel@tonic-gate } 8727c478bd9Sstevel@tonic-gate 8737c478bd9Sstevel@tonic-gate /* 8747c478bd9Sstevel@tonic-gate * Indicate that this symbol has had it's visibility checked so that 8757c478bd9Sstevel@tonic-gate * we don't need to do this investigation again. 8767c478bd9Sstevel@tonic-gate */ 8777c478bd9Sstevel@tonic-gate sdp->sd_flags |= FLG_SY_VISIBLE; 8787c478bd9Sstevel@tonic-gate } 8797c478bd9Sstevel@tonic-gate 8807c478bd9Sstevel@tonic-gate /* 8817c478bd9Sstevel@tonic-gate * After all symbol table input processing has been finished, and all relocation 8827c478bd9Sstevel@tonic-gate * counting has been carried out (ie. no more symbols will be read, generated, 8837c478bd9Sstevel@tonic-gate * or modified), validate and count the relevant entries: 8847c478bd9Sstevel@tonic-gate * 8857c478bd9Sstevel@tonic-gate * o check and print any undefined symbols remaining. Note that 8867c478bd9Sstevel@tonic-gate * if a symbol has been defined by virtue of the inclusion of 8877c478bd9Sstevel@tonic-gate * an implicit shared library, it is still classed as undefined. 8887c478bd9Sstevel@tonic-gate * 8897c478bd9Sstevel@tonic-gate * o count the number of global needed symbols together with the 8907c478bd9Sstevel@tonic-gate * size of their associated name strings (if scoping has been 8917c478bd9Sstevel@tonic-gate * indicated these symbols may be reduced to locals). 8927c478bd9Sstevel@tonic-gate * 8937c478bd9Sstevel@tonic-gate * o establish the size and alignment requirements for the global 8947c478bd9Sstevel@tonic-gate * .bss section (the alignment of this section is based on the 8957c478bd9Sstevel@tonic-gate * first symbol that it will contain). 8967c478bd9Sstevel@tonic-gate */ 8977c478bd9Sstevel@tonic-gate uintptr_t 8987c478bd9Sstevel@tonic-gate sym_validate(Ofl_desc *ofl) 8997c478bd9Sstevel@tonic-gate { 9007c478bd9Sstevel@tonic-gate Sym_avlnode *sav; 9017c478bd9Sstevel@tonic-gate Sym_desc *sdp; 9027c478bd9Sstevel@tonic-gate Sym *sym; 9037c478bd9Sstevel@tonic-gate Word oflags = ofl->ofl_flags; 9047c478bd9Sstevel@tonic-gate Word undef = 0, needed = 0, verdesc = 0; 9057c478bd9Sstevel@tonic-gate Xword bssalign = 0, tlsalign = 0; 9067c478bd9Sstevel@tonic-gate Xword bsssize = 0, tlssize = 0; 907*54d82594Sseizo #if (defined(__i386) || defined(__amd64)) && defined(_ELF64) 908*54d82594Sseizo Xword lbssalign = 0, lbsssize = 0; 909*54d82594Sseizo #endif 9107c478bd9Sstevel@tonic-gate 9117c478bd9Sstevel@tonic-gate /* 9127c478bd9Sstevel@tonic-gate * If a symbol is undefined and this link-edit calls for no undefined 9137c478bd9Sstevel@tonic-gate * symbols to remain (this is the default case when generating an 9147c478bd9Sstevel@tonic-gate * executable but can be enforced for any object using -z defs), the 9157c478bd9Sstevel@tonic-gate * symbol is classified as undefined and a fatal error condition will 9167c478bd9Sstevel@tonic-gate * be indicated. 9177c478bd9Sstevel@tonic-gate * 9187c478bd9Sstevel@tonic-gate * If the symbol is undefined and we're creating a shared object with 9197c478bd9Sstevel@tonic-gate * the -Bsymbolic flag, then the symbol is also classified as undefined 9207c478bd9Sstevel@tonic-gate * and a warning condition will be indicated. 9217c478bd9Sstevel@tonic-gate */ 9227c478bd9Sstevel@tonic-gate if ((oflags & (FLG_OF_SHAROBJ | FLG_OF_SYMBOLIC)) == 9237c478bd9Sstevel@tonic-gate (FLG_OF_SHAROBJ | FLG_OF_SYMBOLIC)) 9247c478bd9Sstevel@tonic-gate undef = FLG_OF_WARN; 9257c478bd9Sstevel@tonic-gate if (oflags & FLG_OF_NOUNDEF) 9267c478bd9Sstevel@tonic-gate undef = FLG_OF_FATAL; 9277c478bd9Sstevel@tonic-gate 9287c478bd9Sstevel@tonic-gate /* 9297c478bd9Sstevel@tonic-gate * If the symbol is referenced from an implicitly included shared object 9307c478bd9Sstevel@tonic-gate * (ie. it's not on the NEEDED list) then the symbol is also classified 9317c478bd9Sstevel@tonic-gate * as undefined and a fatal error condition will be indicated. 9327c478bd9Sstevel@tonic-gate */ 9337c478bd9Sstevel@tonic-gate if ((oflags & FLG_OF_NOUNDEF) || !(oflags & FLG_OF_SHAROBJ)) 9347c478bd9Sstevel@tonic-gate needed = FLG_OF_FATAL; 9357c478bd9Sstevel@tonic-gate 9367c478bd9Sstevel@tonic-gate /* 9377c478bd9Sstevel@tonic-gate * If the output image is being versioned all symbol definitions must be 9387c478bd9Sstevel@tonic-gate * associated with a version. Any symbol that isn't is classified as 9397c478bd9Sstevel@tonic-gate * undefined and a fatal error condition will be indicated. 9407c478bd9Sstevel@tonic-gate */ 9417c478bd9Sstevel@tonic-gate if ((oflags & FLG_OF_VERDEF) && (ofl->ofl_vercnt > VER_NDX_GLOBAL)) 9427c478bd9Sstevel@tonic-gate verdesc = FLG_OF_FATAL; 9437c478bd9Sstevel@tonic-gate 9447c478bd9Sstevel@tonic-gate /* 9457c478bd9Sstevel@tonic-gate * Collect and validate the globals from the internal symbol table. 9467c478bd9Sstevel@tonic-gate */ 9477c478bd9Sstevel@tonic-gate for (sav = avl_first(&ofl->ofl_symavl); sav; 9487c478bd9Sstevel@tonic-gate sav = AVL_NEXT(&ofl->ofl_symavl, sav)) { 9497c478bd9Sstevel@tonic-gate Is_desc * isp; 9507c478bd9Sstevel@tonic-gate int shndx, undeferr = 0; 9517c478bd9Sstevel@tonic-gate 9527c478bd9Sstevel@tonic-gate sdp = sav->sav_symdesc; 9537c478bd9Sstevel@tonic-gate 9547c478bd9Sstevel@tonic-gate /* 9557c478bd9Sstevel@tonic-gate * If undefined symbols are allowed ignore any symbols that are 9567c478bd9Sstevel@tonic-gate * not needed. 9577c478bd9Sstevel@tonic-gate */ 9587c478bd9Sstevel@tonic-gate if (!(oflags & FLG_OF_NOUNDEF) && 9597c478bd9Sstevel@tonic-gate (sdp->sd_ref == REF_DYN_SEEN)) 9607c478bd9Sstevel@tonic-gate continue; 9617c478bd9Sstevel@tonic-gate 9627c478bd9Sstevel@tonic-gate /* 9637c478bd9Sstevel@tonic-gate * If the symbol originates from an external or parent mapfile 9647c478bd9Sstevel@tonic-gate * reference and hasn't been matched to a reference from a 9657c478bd9Sstevel@tonic-gate * relocatable object, ignore it. 9667c478bd9Sstevel@tonic-gate */ 9677c478bd9Sstevel@tonic-gate if ((sdp->sd_flags & (FLG_SY_EXTERN | FLG_SY_PARENT)) && 9687c478bd9Sstevel@tonic-gate ((sdp->sd_flags & FLG_SY_MAPUSED) == 0)) { 9697c478bd9Sstevel@tonic-gate sdp->sd_flags |= FLG_SY_INVALID; 9707c478bd9Sstevel@tonic-gate continue; 9717c478bd9Sstevel@tonic-gate } 9727c478bd9Sstevel@tonic-gate 9737c478bd9Sstevel@tonic-gate sym = sdp->sd_sym; 9747c478bd9Sstevel@tonic-gate shndx = sdp->sd_shndx; 9757c478bd9Sstevel@tonic-gate 9767c478bd9Sstevel@tonic-gate /* 9777c478bd9Sstevel@tonic-gate * Sanity check TLS. 9787c478bd9Sstevel@tonic-gate */ 9797c478bd9Sstevel@tonic-gate if ((ELF_ST_TYPE(sym->st_info) == STT_TLS) && 9807c478bd9Sstevel@tonic-gate (sym->st_size != 0) && (shndx != SHN_UNDEF) && 9817c478bd9Sstevel@tonic-gate (shndx != SHN_COMMON)) { 9827c478bd9Sstevel@tonic-gate Is_desc * isp = sdp->sd_isc; 9837c478bd9Sstevel@tonic-gate Ifl_desc * ifl = sdp->sd_file; 9847c478bd9Sstevel@tonic-gate 9857c478bd9Sstevel@tonic-gate if ((isp == 0) || (isp->is_shdr == 0) || 9867c478bd9Sstevel@tonic-gate ((isp->is_shdr->sh_flags & SHF_TLS) == 0)) { 9877c478bd9Sstevel@tonic-gate eprintf(ERR_FATAL, MSG_INTL(MSG_SYM_TLS), 9887c478bd9Sstevel@tonic-gate demangle(sdp->sd_name), ifl->ifl_name); 9897c478bd9Sstevel@tonic-gate ofl->ofl_flags |= FLG_OF_FATAL; 9907c478bd9Sstevel@tonic-gate continue; 9917c478bd9Sstevel@tonic-gate } 9927c478bd9Sstevel@tonic-gate } 9937c478bd9Sstevel@tonic-gate 9947c478bd9Sstevel@tonic-gate if ((sdp->sd_flags & FLG_SY_VISIBLE) == 0) 9957c478bd9Sstevel@tonic-gate sym_adjust_vis(sdp, ofl); 9967c478bd9Sstevel@tonic-gate 9977c478bd9Sstevel@tonic-gate if ((sdp->sd_flags & FLG_SY_REDUCED) && 9987c478bd9Sstevel@tonic-gate (oflags & FLG_OF_PROCRED)) { 9997c478bd9Sstevel@tonic-gate DBG_CALL(Dbg_syms_reduce(DBG_SYM_REDUCE_GLOBAL, 10007c478bd9Sstevel@tonic-gate (ofl->ofl_ehdr) ? ofl->ofl_ehdr : 10017c478bd9Sstevel@tonic-gate &def_ehdr, sdp, 0, 0)); 10027c478bd9Sstevel@tonic-gate } 10037c478bd9Sstevel@tonic-gate 10047c478bd9Sstevel@tonic-gate /* 10057c478bd9Sstevel@tonic-gate * If building a shared object or executable, and this is a 10067c478bd9Sstevel@tonic-gate * non-weak UNDEF symbol with reduced visibility (STV_*), then 10077c478bd9Sstevel@tonic-gate * give a fatal error. 10087c478bd9Sstevel@tonic-gate */ 10097c478bd9Sstevel@tonic-gate if (!(oflags & FLG_OF_RELOBJ) && 10107c478bd9Sstevel@tonic-gate ELF_ST_VISIBILITY(sym->st_other) && (shndx == SHN_UNDEF) && 10117c478bd9Sstevel@tonic-gate (ELF_ST_BIND(sym->st_info) != STB_WEAK)) { 10127c478bd9Sstevel@tonic-gate sym_undef_entry(sdp, BNDLOCAL); 10137c478bd9Sstevel@tonic-gate ofl->ofl_flags |= FLG_OF_FATAL; 10147c478bd9Sstevel@tonic-gate continue; 10157c478bd9Sstevel@tonic-gate } 10167c478bd9Sstevel@tonic-gate 10177c478bd9Sstevel@tonic-gate /* 10187c478bd9Sstevel@tonic-gate * If this symbol is defined in a non-allocatable section, 10197c478bd9Sstevel@tonic-gate * reduce it to local symbol. 10207c478bd9Sstevel@tonic-gate */ 10217c478bd9Sstevel@tonic-gate if (((isp = sdp->sd_isc) != 0) && isp->is_shdr && 10227c478bd9Sstevel@tonic-gate ((isp->is_shdr->sh_flags & SHF_ALLOC) == 0)) { 10237c478bd9Sstevel@tonic-gate sdp->sd_flags |= FLG_SY_REDUCED; 10247c478bd9Sstevel@tonic-gate sdp->sd_flags1 |= FLG_SY1_LOCL; 10257c478bd9Sstevel@tonic-gate } 10267c478bd9Sstevel@tonic-gate 10277c478bd9Sstevel@tonic-gate /* 10287c478bd9Sstevel@tonic-gate * If this symbol originated as a SHN_SUNW_IGNORE, it will have 10297c478bd9Sstevel@tonic-gate * been processed as an SHN_UNDEF. Return the symbol to its 10307c478bd9Sstevel@tonic-gate * original index for validation, and propagation to the output 10317c478bd9Sstevel@tonic-gate * file. 10327c478bd9Sstevel@tonic-gate */ 10337c478bd9Sstevel@tonic-gate if (sdp->sd_flags1 & FLG_SY1_IGNORE) 10347c478bd9Sstevel@tonic-gate sdp->sd_shndx = shndx = SHN_SUNW_IGNORE; 10357c478bd9Sstevel@tonic-gate 10367c478bd9Sstevel@tonic-gate if (undef) { 10377c478bd9Sstevel@tonic-gate /* 10387c478bd9Sstevel@tonic-gate * If an non-weak reference remains undefined, or if a 10397c478bd9Sstevel@tonic-gate * mapfile reference is not bound to the relocatable 10407c478bd9Sstevel@tonic-gate * objects that make up the object being built, we have 10417c478bd9Sstevel@tonic-gate * a fatal error. 10427c478bd9Sstevel@tonic-gate * 10437c478bd9Sstevel@tonic-gate * The exceptions are symbols which are defined to be 10447c478bd9Sstevel@tonic-gate * found in the parent (FLG_SY_PARENT), which is really 10457c478bd9Sstevel@tonic-gate * only meaningful for direct binding, or are defined 10467c478bd9Sstevel@tonic-gate * external (FLG_SY_EXTERN) so as to suppress -zdefs 10477c478bd9Sstevel@tonic-gate * errors. 10487c478bd9Sstevel@tonic-gate * 10497c478bd9Sstevel@tonic-gate * Register symbols are always allowed to be UNDEF. 10507c478bd9Sstevel@tonic-gate * 10517c478bd9Sstevel@tonic-gate * Note that we don't include references created via -u 10527c478bd9Sstevel@tonic-gate * in the same shared object binding test. This is for 10537c478bd9Sstevel@tonic-gate * backward compatibility, in that a number of archive 10547c478bd9Sstevel@tonic-gate * makefile rules used -u to cause archive extraction. 10557c478bd9Sstevel@tonic-gate * These same rules have been cut and pasted to apply 10567c478bd9Sstevel@tonic-gate * to shared objects, and thus although the -u reference 10577c478bd9Sstevel@tonic-gate * is redundant, flagging it as fatal could cause some 10587c478bd9Sstevel@tonic-gate * build to fail. Also we have documented the use of 10597c478bd9Sstevel@tonic-gate * -u as a mechanism to cause binding to weak version 10607c478bd9Sstevel@tonic-gate * definitions, thus giving users an error condition 10617c478bd9Sstevel@tonic-gate * would be incorrect. 10627c478bd9Sstevel@tonic-gate */ 10637c478bd9Sstevel@tonic-gate if (!(sdp->sd_flags & FLG_SY_REGSYM) && 10647c478bd9Sstevel@tonic-gate ((shndx == SHN_UNDEF) && 10657c478bd9Sstevel@tonic-gate ((ELF_ST_BIND(sym->st_info) != STB_WEAK) && 10667c478bd9Sstevel@tonic-gate ((sdp->sd_flags & 10677c478bd9Sstevel@tonic-gate (FLG_SY_PARENT | FLG_SY_EXTERN)) == 0)) || 10687c478bd9Sstevel@tonic-gate (((sdp->sd_flags & 10697c478bd9Sstevel@tonic-gate (FLG_SY_MAPREF | FLG_SY_MAPUSED)) == 10707c478bd9Sstevel@tonic-gate FLG_SY_MAPREF) && 10717c478bd9Sstevel@tonic-gate ((sdp->sd_flags1 & (FLG_SY1_LOCL | 10727c478bd9Sstevel@tonic-gate FLG_SY1_PROT)) == 0)))) { 10737c478bd9Sstevel@tonic-gate sym_undef_entry(sdp, UNDEF); 10747c478bd9Sstevel@tonic-gate ofl->ofl_flags |= undef; 10757c478bd9Sstevel@tonic-gate undeferr = 1; 10767c478bd9Sstevel@tonic-gate } 10777c478bd9Sstevel@tonic-gate 10787c478bd9Sstevel@tonic-gate } else { 10797c478bd9Sstevel@tonic-gate /* 10807c478bd9Sstevel@tonic-gate * For building things like shared objects (or anything 10817c478bd9Sstevel@tonic-gate * -znodefs), undefined symbols are allowed. 10827c478bd9Sstevel@tonic-gate * 10837c478bd9Sstevel@tonic-gate * If a mapfile reference remains undefined the user 10847c478bd9Sstevel@tonic-gate * would probably like a warning at least (they've 10857c478bd9Sstevel@tonic-gate * usually mis-spelt the reference). Refer to the above 10867c478bd9Sstevel@tonic-gate * comments for discussion on -u references, which 10877c478bd9Sstevel@tonic-gate * are not tested for in the same manner. 10887c478bd9Sstevel@tonic-gate */ 10897c478bd9Sstevel@tonic-gate if ((sdp->sd_flags & 10907c478bd9Sstevel@tonic-gate (FLG_SY_MAPREF | FLG_SY_MAPUSED)) == 10917c478bd9Sstevel@tonic-gate FLG_SY_MAPREF) { 10927c478bd9Sstevel@tonic-gate sym_undef_entry(sdp, UNDEF); 10937c478bd9Sstevel@tonic-gate ofl->ofl_flags |= FLG_OF_WARN; 10947c478bd9Sstevel@tonic-gate undeferr = 1; 10957c478bd9Sstevel@tonic-gate } 10967c478bd9Sstevel@tonic-gate } 10977c478bd9Sstevel@tonic-gate 10987c478bd9Sstevel@tonic-gate /* 10997c478bd9Sstevel@tonic-gate * If this symbol comes from a dependency mark the dependency 11007c478bd9Sstevel@tonic-gate * as required (-z ignore can result in unused dependencies 11017c478bd9Sstevel@tonic-gate * being dropped). If we need to record dependency versioning 11027c478bd9Sstevel@tonic-gate * information indicate what version of the needed shared object 11037c478bd9Sstevel@tonic-gate * this symbol is part of. Flag the symbol as undefined if it 11047c478bd9Sstevel@tonic-gate * has not been made available to us. 11057c478bd9Sstevel@tonic-gate */ 11067c478bd9Sstevel@tonic-gate if ((sdp->sd_ref == REF_DYN_NEED) && 11077c478bd9Sstevel@tonic-gate (!(sdp->sd_flags & FLG_SY_REFRSD))) { 11087c478bd9Sstevel@tonic-gate sdp->sd_file->ifl_flags |= FLG_IF_DEPREQD; 11097c478bd9Sstevel@tonic-gate 11107c478bd9Sstevel@tonic-gate /* 11117c478bd9Sstevel@tonic-gate * Capture that we've bound to a symbol that doesn't 11127c478bd9Sstevel@tonic-gate * allow being directly bound to. 11137c478bd9Sstevel@tonic-gate */ 11147c478bd9Sstevel@tonic-gate if (sdp->sd_flags1 & FLG_SY1_NDIR) 11157c478bd9Sstevel@tonic-gate ofl->ofl_flags1 |= FLG_OF1_NDIRECT; 11167c478bd9Sstevel@tonic-gate 11177c478bd9Sstevel@tonic-gate if (sdp->sd_file->ifl_vercnt) { 11187c478bd9Sstevel@tonic-gate int vndx; 11197c478bd9Sstevel@tonic-gate Ver_index * vip; 11207c478bd9Sstevel@tonic-gate 11217c478bd9Sstevel@tonic-gate vndx = sdp->sd_aux->sa_dverndx; 11227c478bd9Sstevel@tonic-gate vip = &sdp->sd_file->ifl_verndx[vndx]; 11237c478bd9Sstevel@tonic-gate if (vip->vi_flags & FLG_VER_AVAIL) { 11247c478bd9Sstevel@tonic-gate vip->vi_flags |= FLG_VER_REFER; 11257c478bd9Sstevel@tonic-gate } else { 11267c478bd9Sstevel@tonic-gate sym_undef_entry(sdp, NOTAVAIL); 11277c478bd9Sstevel@tonic-gate ofl->ofl_flags |= FLG_OF_FATAL; 11287c478bd9Sstevel@tonic-gate continue; 11297c478bd9Sstevel@tonic-gate } 11307c478bd9Sstevel@tonic-gate } 11317c478bd9Sstevel@tonic-gate } 11327c478bd9Sstevel@tonic-gate 11337c478bd9Sstevel@tonic-gate /* 11347c478bd9Sstevel@tonic-gate * Test that we do not bind to symbol supplied from an implicit 11357c478bd9Sstevel@tonic-gate * shared object. If a binding is from a weak reference it can 11367c478bd9Sstevel@tonic-gate * be ignored. 11377c478bd9Sstevel@tonic-gate */ 11387c478bd9Sstevel@tonic-gate if (needed && !undeferr && (sdp->sd_flags & FLG_SY_GLOBREF) && 11397c478bd9Sstevel@tonic-gate (sdp->sd_ref == REF_DYN_NEED) && 11407c478bd9Sstevel@tonic-gate (sdp->sd_flags & FLG_SY_NOTAVAIL)) { 11417c478bd9Sstevel@tonic-gate sym_undef_entry(sdp, IMPLICIT); 11427c478bd9Sstevel@tonic-gate ofl->ofl_flags |= needed; 11437c478bd9Sstevel@tonic-gate continue; 11447c478bd9Sstevel@tonic-gate } 11457c478bd9Sstevel@tonic-gate 11467c478bd9Sstevel@tonic-gate /* 11477c478bd9Sstevel@tonic-gate * Test that a symbol isn't going to be reduced to local scope 11487c478bd9Sstevel@tonic-gate * which actually wants to bind to a shared object - if so it's 11497c478bd9Sstevel@tonic-gate * a fatal error. 11507c478bd9Sstevel@tonic-gate */ 11517c478bd9Sstevel@tonic-gate if ((sdp->sd_ref == REF_DYN_NEED) && 11527c478bd9Sstevel@tonic-gate (sdp->sd_flags1 & (FLG_SY1_LOCL | FLG_SY1_PROT))) { 11537c478bd9Sstevel@tonic-gate sym_undef_entry(sdp, BNDLOCAL); 11547c478bd9Sstevel@tonic-gate ofl->ofl_flags |= FLG_OF_FATAL; 11557c478bd9Sstevel@tonic-gate continue; 11567c478bd9Sstevel@tonic-gate } 11577c478bd9Sstevel@tonic-gate 11587c478bd9Sstevel@tonic-gate /* 11597c478bd9Sstevel@tonic-gate * If the output image is to be versioned then all symbol 11607c478bd9Sstevel@tonic-gate * definitions must be associated with a version. 11617c478bd9Sstevel@tonic-gate */ 11627c478bd9Sstevel@tonic-gate if (verdesc && (sdp->sd_ref == REF_REL_NEED) && 11637c478bd9Sstevel@tonic-gate (shndx != SHN_UNDEF) && 11647c478bd9Sstevel@tonic-gate (!(sdp->sd_flags1 & FLG_SY1_LOCL)) && 11657c478bd9Sstevel@tonic-gate (sdp->sd_aux->sa_overndx == 0)) { 11667c478bd9Sstevel@tonic-gate sym_undef_entry(sdp, NOVERSION); 11677c478bd9Sstevel@tonic-gate ofl->ofl_flags |= verdesc; 11687c478bd9Sstevel@tonic-gate continue; 11697c478bd9Sstevel@tonic-gate } 11707c478bd9Sstevel@tonic-gate 11717c478bd9Sstevel@tonic-gate /* 11727c478bd9Sstevel@tonic-gate * If we don't need the symbol there's no need to process it 11737c478bd9Sstevel@tonic-gate * any further. 11747c478bd9Sstevel@tonic-gate */ 11757c478bd9Sstevel@tonic-gate if (sdp->sd_ref == REF_DYN_SEEN) 11767c478bd9Sstevel@tonic-gate continue; 11777c478bd9Sstevel@tonic-gate 11787c478bd9Sstevel@tonic-gate /* 11797c478bd9Sstevel@tonic-gate * Calculate the size and alignment requirements for the global 11807c478bd9Sstevel@tonic-gate * .bss and .tls sections. If we're building a relocatable 11817c478bd9Sstevel@tonic-gate * object only account for scoped COMMON symbols (these will 11827c478bd9Sstevel@tonic-gate * be converted to .bss references). 11837c478bd9Sstevel@tonic-gate * 11847c478bd9Sstevel@tonic-gate * For partially initialized symbol, 11857c478bd9Sstevel@tonic-gate * if it is expanded, it goes to sunwdata1. 11867c478bd9Sstevel@tonic-gate * if it is local, it goes to .bss. 11877c478bd9Sstevel@tonic-gate * if the output is shared object, it goes to .sunwbss. 11887c478bd9Sstevel@tonic-gate * 11897c478bd9Sstevel@tonic-gate * Also refer to make_mvsections() in sunwmove.c 11907c478bd9Sstevel@tonic-gate */ 11917c478bd9Sstevel@tonic-gate if ((shndx == SHN_COMMON) && ((!(oflags & FLG_OF_RELOBJ)) || 11927c478bd9Sstevel@tonic-gate ((sdp->sd_flags1 & FLG_SY1_LOCL) && 11937c478bd9Sstevel@tonic-gate (oflags & FLG_OF_PROCRED)))) { 11947c478bd9Sstevel@tonic-gate int countbss = 0; 11957c478bd9Sstevel@tonic-gate 11967c478bd9Sstevel@tonic-gate if (sdp->sd_psyminfo == 0) { 11977c478bd9Sstevel@tonic-gate countbss = 1; 11987c478bd9Sstevel@tonic-gate } else if ((sdp->sd_flags & FLG_SY_PAREXPN) != 0) { 11997c478bd9Sstevel@tonic-gate countbss = 0; 12007c478bd9Sstevel@tonic-gate } else if (ELF_ST_BIND(sym->st_info) == STB_LOCAL) { 12017c478bd9Sstevel@tonic-gate countbss = 1; 12027c478bd9Sstevel@tonic-gate } else if ((ofl->ofl_flags & FLG_OF_SHAROBJ) != 0) { 12037c478bd9Sstevel@tonic-gate countbss = 0; 12047c478bd9Sstevel@tonic-gate } else 12057c478bd9Sstevel@tonic-gate countbss = 1; 12067c478bd9Sstevel@tonic-gate 12077c478bd9Sstevel@tonic-gate if (countbss) { 12087c478bd9Sstevel@tonic-gate Xword * size, * align; 12097c478bd9Sstevel@tonic-gate 12107c478bd9Sstevel@tonic-gate if (ELF_ST_TYPE(sym->st_info) != STT_TLS) { 12117c478bd9Sstevel@tonic-gate size = &bsssize; 12127c478bd9Sstevel@tonic-gate align = &bssalign; 12137c478bd9Sstevel@tonic-gate } else { 12147c478bd9Sstevel@tonic-gate size = &tlssize; 12157c478bd9Sstevel@tonic-gate align = &tlsalign; 12167c478bd9Sstevel@tonic-gate } 12177c478bd9Sstevel@tonic-gate *size = (Xword)S_ROUND(*size, sym->st_value) + 1218dd94ecefSrie sym->st_size; 12197c478bd9Sstevel@tonic-gate if (sym->st_value > *align) 12207c478bd9Sstevel@tonic-gate *align = sym->st_value; 12217c478bd9Sstevel@tonic-gate } 12227c478bd9Sstevel@tonic-gate } 12237c478bd9Sstevel@tonic-gate 1224*54d82594Sseizo #if (defined(__i386) || defined(__amd64)) && defined(_ELF64) 1225*54d82594Sseizo /* 1226*54d82594Sseizo * Calculate the size and alignment requirement for the global 1227*54d82594Sseizo * .lbss. TLS or partially initialized symbols do not need to be 1228*54d82594Sseizo * considered yet. 1229*54d82594Sseizo */ 1230*54d82594Sseizo if (shndx == SHN_X86_64_LCOMMON) { 1231*54d82594Sseizo lbsssize = (Xword)S_ROUND(lbsssize, sym->st_value) + 1232*54d82594Sseizo sym->st_size; 1233*54d82594Sseizo if (sym->st_value > lbssalign) 1234*54d82594Sseizo lbssalign = sym->st_value; 1235*54d82594Sseizo } 1236*54d82594Sseizo #endif 1237*54d82594Sseizo 12387c478bd9Sstevel@tonic-gate /* 12397c478bd9Sstevel@tonic-gate * If a symbol was referenced via the command line 12407c478bd9Sstevel@tonic-gate * (ld -u <>, ...), then this counts as a reference against the 12417c478bd9Sstevel@tonic-gate * symbol. Mark any section that symbol is defined in. 12427c478bd9Sstevel@tonic-gate */ 12437c478bd9Sstevel@tonic-gate if (((isp = sdp->sd_isc) != 0) && 12447c478bd9Sstevel@tonic-gate (sdp->sd_flags & FLG_SY_CMDREF)) { 12457c478bd9Sstevel@tonic-gate isp->is_flags |= FLG_IS_SECTREF; 12467c478bd9Sstevel@tonic-gate isp->is_file->ifl_flags |= FLG_IF_FILEREF; 12477c478bd9Sstevel@tonic-gate } 12487c478bd9Sstevel@tonic-gate 12497c478bd9Sstevel@tonic-gate /* 12507c478bd9Sstevel@tonic-gate * Update the symbol count and the associated name string size. 12517c478bd9Sstevel@tonic-gate * If scoping is in effect for this symbol assign it will be 12527c478bd9Sstevel@tonic-gate * assigned to the .symtab/.strtab sections. 12537c478bd9Sstevel@tonic-gate */ 12547c478bd9Sstevel@tonic-gate if ((sdp->sd_flags1 & FLG_SY1_LOCL) && 12557c478bd9Sstevel@tonic-gate (oflags & FLG_OF_PROCRED)) { 12567c478bd9Sstevel@tonic-gate /* 12577c478bd9Sstevel@tonic-gate * If symbol gets eliminated count it. 12587c478bd9Sstevel@tonic-gate * 12597c478bd9Sstevel@tonic-gate * If symbol gets reduced to local, 12607c478bd9Sstevel@tonic-gate * count it's size for the .symtab. 12617c478bd9Sstevel@tonic-gate */ 12627c478bd9Sstevel@tonic-gate if (sdp->sd_flags1 & FLG_SY1_ELIM) { 12637c478bd9Sstevel@tonic-gate ofl->ofl_elimcnt++; 12647c478bd9Sstevel@tonic-gate } else { 12657c478bd9Sstevel@tonic-gate ofl->ofl_scopecnt++; 12667c478bd9Sstevel@tonic-gate if ((((sdp->sd_flags & FLG_SY_REGSYM) == 0) || 12677c478bd9Sstevel@tonic-gate sym->st_name) && (st_insert(ofl->ofl_strtab, 12687c478bd9Sstevel@tonic-gate sdp->sd_name) == -1)) 12697c478bd9Sstevel@tonic-gate return (S_ERROR); 12707c478bd9Sstevel@tonic-gate } 12717c478bd9Sstevel@tonic-gate } else { 12727c478bd9Sstevel@tonic-gate ofl->ofl_globcnt++; 12737c478bd9Sstevel@tonic-gate 12747c478bd9Sstevel@tonic-gate /* 12757c478bd9Sstevel@tonic-gate * If global direct bindings are in effect, or this 12767c478bd9Sstevel@tonic-gate * symbol has bound to a dependency which was specified 12777c478bd9Sstevel@tonic-gate * as requiring direct bindings, and it hasn't 12787c478bd9Sstevel@tonic-gate * explicitly been defined as a non-direct binding 12797c478bd9Sstevel@tonic-gate * symbol, mark it. 12807c478bd9Sstevel@tonic-gate */ 12817c478bd9Sstevel@tonic-gate if (((ofl->ofl_dtflags_1 & DF_1_DIRECT) || (isp && 12827c478bd9Sstevel@tonic-gate (isp->is_file->ifl_flags & FLG_IF_DIRECT))) && 12837c478bd9Sstevel@tonic-gate ((sdp->sd_flags1 & FLG_SY1_NDIR) == 0)) 12847c478bd9Sstevel@tonic-gate sdp->sd_flags1 |= FLG_SY1_DIR; 12857c478bd9Sstevel@tonic-gate 12867c478bd9Sstevel@tonic-gate /* 12877c478bd9Sstevel@tonic-gate * Insert the symbol name. 12887c478bd9Sstevel@tonic-gate */ 12897c478bd9Sstevel@tonic-gate if (((sdp->sd_flags & FLG_SY_REGSYM) == 0) || 12907c478bd9Sstevel@tonic-gate sym->st_name) { 12917c478bd9Sstevel@tonic-gate if (st_insert(ofl->ofl_strtab, 12927c478bd9Sstevel@tonic-gate sdp->sd_name) == -1) 12937c478bd9Sstevel@tonic-gate return (S_ERROR); 12947c478bd9Sstevel@tonic-gate 12957c478bd9Sstevel@tonic-gate if (!(ofl->ofl_flags & FLG_OF_RELOBJ) && 12967c478bd9Sstevel@tonic-gate (st_insert(ofl->ofl_dynstrtab, 12977c478bd9Sstevel@tonic-gate sdp->sd_name) == -1)) 12987c478bd9Sstevel@tonic-gate return (S_ERROR); 12997c478bd9Sstevel@tonic-gate } 13007c478bd9Sstevel@tonic-gate 13017c478bd9Sstevel@tonic-gate /* 13027c478bd9Sstevel@tonic-gate * If this section offers a global symbol - record that 13037c478bd9Sstevel@tonic-gate * fact. 13047c478bd9Sstevel@tonic-gate */ 13057c478bd9Sstevel@tonic-gate if (isp) { 13067c478bd9Sstevel@tonic-gate isp->is_flags |= FLG_IS_SECTREF; 13077c478bd9Sstevel@tonic-gate isp->is_file->ifl_flags |= FLG_IF_FILEREF; 13087c478bd9Sstevel@tonic-gate } 13097c478bd9Sstevel@tonic-gate } 13107c478bd9Sstevel@tonic-gate } 13117c478bd9Sstevel@tonic-gate 13127c478bd9Sstevel@tonic-gate /* 13137c478bd9Sstevel@tonic-gate * If we've encountered a fatal error during symbol validation then 13147c478bd9Sstevel@tonic-gate * return now. 13157c478bd9Sstevel@tonic-gate */ 13167c478bd9Sstevel@tonic-gate if (ofl->ofl_flags & FLG_OF_FATAL) 13177c478bd9Sstevel@tonic-gate return (1); 13187c478bd9Sstevel@tonic-gate 13197c478bd9Sstevel@tonic-gate /* 13207c478bd9Sstevel@tonic-gate * Now that symbol resolution is completed, scan any register symbols. 13217c478bd9Sstevel@tonic-gate * From now on, we're only interested in those that contribute to the 13227c478bd9Sstevel@tonic-gate * output file. 13237c478bd9Sstevel@tonic-gate */ 13247c478bd9Sstevel@tonic-gate if (ofl->ofl_regsyms) { 13257c478bd9Sstevel@tonic-gate int ndx; 13267c478bd9Sstevel@tonic-gate 13277c478bd9Sstevel@tonic-gate for (ndx = 0; ndx < ofl->ofl_regsymsno; ndx++) { 13287c478bd9Sstevel@tonic-gate if ((sdp = ofl->ofl_regsyms[ndx]) == 0) 13297c478bd9Sstevel@tonic-gate continue; 13307c478bd9Sstevel@tonic-gate if (sdp->sd_ref != REF_REL_NEED) { 13317c478bd9Sstevel@tonic-gate ofl->ofl_regsyms[ndx] = 0; 13327c478bd9Sstevel@tonic-gate continue; 13337c478bd9Sstevel@tonic-gate } 13347c478bd9Sstevel@tonic-gate 13357c478bd9Sstevel@tonic-gate ofl->ofl_regsymcnt++; 13367c478bd9Sstevel@tonic-gate if (sdp->sd_sym->st_name == 0) 13377c478bd9Sstevel@tonic-gate sdp->sd_name = MSG_ORIG(MSG_STR_EMPTY); 13387c478bd9Sstevel@tonic-gate 13397c478bd9Sstevel@tonic-gate if ((sdp->sd_flags1 & FLG_SY1_LOCL) || 13407c478bd9Sstevel@tonic-gate (ELF_ST_BIND(sdp->sd_sym->st_info) == STB_LOCAL)) 13417c478bd9Sstevel@tonic-gate ofl->ofl_lregsymcnt++; 13427c478bd9Sstevel@tonic-gate } 13437c478bd9Sstevel@tonic-gate } 13447c478bd9Sstevel@tonic-gate 13457c478bd9Sstevel@tonic-gate /* 13467c478bd9Sstevel@tonic-gate * Generate the .bss section now that we know its size and alignment. 13477c478bd9Sstevel@tonic-gate */ 13487c478bd9Sstevel@tonic-gate if (bsssize || !(oflags & FLG_OF_RELOBJ)) { 1349*54d82594Sseizo if (make_bss(ofl, bsssize, bssalign, MAKE_BSS) == S_ERROR) 13507c478bd9Sstevel@tonic-gate return (S_ERROR); 13517c478bd9Sstevel@tonic-gate } 13527c478bd9Sstevel@tonic-gate if (tlssize) { 1353*54d82594Sseizo if (make_bss(ofl, tlssize, tlsalign, MAKE_TLS) == S_ERROR) 1354*54d82594Sseizo return (S_ERROR); 1355*54d82594Sseizo } 1356*54d82594Sseizo #if (defined(__i386) || defined(__amd64)) && defined(_ELF64) 1357*54d82594Sseizo if (lbsssize && !(oflags & FLG_OF_RELOBJ)) { 1358*54d82594Sseizo if (make_bss(ofl, lbsssize, lbssalign, MAKE_LBSS) == S_ERROR) 13597c478bd9Sstevel@tonic-gate return (S_ERROR); 13607c478bd9Sstevel@tonic-gate } 1361*54d82594Sseizo #endif 13627c478bd9Sstevel@tonic-gate 13637c478bd9Sstevel@tonic-gate /* 13647c478bd9Sstevel@tonic-gate * Determine what entry point symbol we need, and if found save its 13657c478bd9Sstevel@tonic-gate * symbol descriptor so that we can update the ELF header entry with the 13667c478bd9Sstevel@tonic-gate * symbols value later (see update_oehdr). Make sure the symbol is 13677c478bd9Sstevel@tonic-gate * tagged to insure its update in case -s is in effect. Use any -e 13687c478bd9Sstevel@tonic-gate * option first, or the default entry points `_start' and `main'. 13697c478bd9Sstevel@tonic-gate */ 13707c478bd9Sstevel@tonic-gate if (ofl->ofl_entry) { 13717c478bd9Sstevel@tonic-gate if (((sdp = sym_find(ofl->ofl_entry, SYM_NOHASH, 0, ofl)) == 13727c478bd9Sstevel@tonic-gate NULL) || (sdp->sd_ref != REF_REL_NEED)) { 13737c478bd9Sstevel@tonic-gate eprintf(ERR_FATAL, MSG_INTL(MSG_SYM_ENTRY), 13747c478bd9Sstevel@tonic-gate demangle((char *)ofl->ofl_entry)); 13757c478bd9Sstevel@tonic-gate return (S_ERROR); 13767c478bd9Sstevel@tonic-gate } 13777c478bd9Sstevel@tonic-gate ofl->ofl_entry = (void *)sdp; 13787c478bd9Sstevel@tonic-gate sdp->sd_flags |= FLG_SY_UPREQD; 13797c478bd9Sstevel@tonic-gate if (sdp->sd_isc) { 13807c478bd9Sstevel@tonic-gate sdp->sd_isc->is_flags |= FLG_IS_SECTREF; 13817c478bd9Sstevel@tonic-gate sdp->sd_isc->is_file->ifl_flags |= FLG_IF_FILEREF; 13827c478bd9Sstevel@tonic-gate } 13837c478bd9Sstevel@tonic-gate } else if (((sdp = sym_find(MSG_ORIG(MSG_SYM_START), 13847c478bd9Sstevel@tonic-gate SYM_NOHASH, 0, ofl)) != NULL) && (sdp->sd_ref == REF_REL_NEED)) { 13857c478bd9Sstevel@tonic-gate ofl->ofl_entry = (void *)sdp; 13867c478bd9Sstevel@tonic-gate sdp->sd_flags |= FLG_SY_UPREQD; 13877c478bd9Sstevel@tonic-gate if (sdp->sd_isc) { 13887c478bd9Sstevel@tonic-gate sdp->sd_isc->is_flags |= FLG_IS_SECTREF; 13897c478bd9Sstevel@tonic-gate sdp->sd_isc->is_file->ifl_flags |= FLG_IF_FILEREF; 13907c478bd9Sstevel@tonic-gate } 13917c478bd9Sstevel@tonic-gate } else if (((sdp = sym_find(MSG_ORIG(MSG_SYM_MAIN), 13927c478bd9Sstevel@tonic-gate SYM_NOHASH, 0, ofl)) != NULL) && (sdp->sd_ref == REF_REL_NEED)) { 13937c478bd9Sstevel@tonic-gate ofl->ofl_entry = (void *)sdp; 13947c478bd9Sstevel@tonic-gate sdp->sd_flags |= FLG_SY_UPREQD; 13957c478bd9Sstevel@tonic-gate if (sdp->sd_isc) { 13967c478bd9Sstevel@tonic-gate sdp->sd_isc->is_flags |= FLG_IS_SECTREF; 13977c478bd9Sstevel@tonic-gate sdp->sd_isc->is_file->ifl_flags |= FLG_IF_FILEREF; 13987c478bd9Sstevel@tonic-gate } 13997c478bd9Sstevel@tonic-gate } 14007c478bd9Sstevel@tonic-gate 14017c478bd9Sstevel@tonic-gate /* 14027c478bd9Sstevel@tonic-gate * If ld -zdtrace=<sym> was given, then validate that the 14037c478bd9Sstevel@tonic-gate * symbol is defined within the current object being built. 14047c478bd9Sstevel@tonic-gate */ 14057c478bd9Sstevel@tonic-gate if ((sdp = ofl->ofl_dtracesym) != 0) { 14067c478bd9Sstevel@tonic-gate if ((sdp->sd_ref != REF_REL_NEED) || 14077c478bd9Sstevel@tonic-gate (sdp->sd_shndx == SHN_UNDEF)) { 14087c478bd9Sstevel@tonic-gate eprintf(ERR_FATAL, MSG_INTL(MSG_SYM_DTRACE), 14097c478bd9Sstevel@tonic-gate demangle((char *)sdp->sd_name)); 14107c478bd9Sstevel@tonic-gate return (S_ERROR); 14117c478bd9Sstevel@tonic-gate } 14127c478bd9Sstevel@tonic-gate sdp->sd_flags |= FLG_SY_UPREQD; 14137c478bd9Sstevel@tonic-gate if (sdp->sd_isc) { 14147c478bd9Sstevel@tonic-gate sdp->sd_isc->is_flags |= FLG_IS_SECTREF; 14157c478bd9Sstevel@tonic-gate sdp->sd_isc->is_file->ifl_flags |= FLG_IF_FILEREF; 14167c478bd9Sstevel@tonic-gate } 14177c478bd9Sstevel@tonic-gate } 14187c478bd9Sstevel@tonic-gate 14197c478bd9Sstevel@tonic-gate /* 14207c478bd9Sstevel@tonic-gate * If we're required to record any needed dependencies versioning 14217c478bd9Sstevel@tonic-gate * information calculate it now that all symbols have been validated. 14227c478bd9Sstevel@tonic-gate */ 14237c478bd9Sstevel@tonic-gate if ((oflags & (FLG_OF_VERNEED | FLG_OF_NOVERSEC)) == FLG_OF_VERNEED) 14247c478bd9Sstevel@tonic-gate return (vers_check_need(ofl)); 14257c478bd9Sstevel@tonic-gate else 14267c478bd9Sstevel@tonic-gate return (1); 14277c478bd9Sstevel@tonic-gate } 14287c478bd9Sstevel@tonic-gate 14297c478bd9Sstevel@tonic-gate /* 14307c478bd9Sstevel@tonic-gate * qsort(3c) comparison function. As an optimization for associating weak 14317c478bd9Sstevel@tonic-gate * symbols to their strong counterparts sort global symbols according to their 14327c478bd9Sstevel@tonic-gate * address and binding. 14337c478bd9Sstevel@tonic-gate */ 14347c478bd9Sstevel@tonic-gate static int 14357c478bd9Sstevel@tonic-gate compare(const void * sdpp1, const void * sdpp2) 14367c478bd9Sstevel@tonic-gate { 14377c478bd9Sstevel@tonic-gate Sym_desc * sdp1 = *((Sym_desc **)sdpp1); 14387c478bd9Sstevel@tonic-gate Sym_desc * sdp2 = *((Sym_desc **)sdpp2); 14397c478bd9Sstevel@tonic-gate Sym * sym1, * sym2; 14407c478bd9Sstevel@tonic-gate uchar_t bind1, bind2; 14417c478bd9Sstevel@tonic-gate 14427c478bd9Sstevel@tonic-gate /* 14437c478bd9Sstevel@tonic-gate * Symbol descriptors may be zero, move these to the front of the 14447c478bd9Sstevel@tonic-gate * sorted array. 14457c478bd9Sstevel@tonic-gate */ 14467c478bd9Sstevel@tonic-gate if (sdp1 == 0) 14477c478bd9Sstevel@tonic-gate return (-1); 14487c478bd9Sstevel@tonic-gate if (sdp2 == 0) 14497c478bd9Sstevel@tonic-gate return (1); 14507c478bd9Sstevel@tonic-gate 14517c478bd9Sstevel@tonic-gate sym1 = sdp1->sd_sym; 14527c478bd9Sstevel@tonic-gate sym2 = sdp2->sd_sym; 14537c478bd9Sstevel@tonic-gate 14547c478bd9Sstevel@tonic-gate /* 14557c478bd9Sstevel@tonic-gate * Compare the symbols value (address). 14567c478bd9Sstevel@tonic-gate */ 14577c478bd9Sstevel@tonic-gate if (sym1->st_value > sym2->st_value) 14587c478bd9Sstevel@tonic-gate return (1); 14597c478bd9Sstevel@tonic-gate if (sym1->st_value < sym2->st_value) 14607c478bd9Sstevel@tonic-gate return (-1); 14617c478bd9Sstevel@tonic-gate 14627c478bd9Sstevel@tonic-gate bind1 = ELF_ST_BIND(sym1->st_info); 14637c478bd9Sstevel@tonic-gate bind2 = ELF_ST_BIND(sym2->st_info); 14647c478bd9Sstevel@tonic-gate 14657c478bd9Sstevel@tonic-gate /* 14667c478bd9Sstevel@tonic-gate * If two symbols have the same address place the weak symbol before 14677c478bd9Sstevel@tonic-gate * any strong counterpart. 14687c478bd9Sstevel@tonic-gate */ 14697c478bd9Sstevel@tonic-gate if (bind1 > bind2) 14707c478bd9Sstevel@tonic-gate return (-1); 14717c478bd9Sstevel@tonic-gate if (bind1 < bind2) 14727c478bd9Sstevel@tonic-gate return (1); 14737c478bd9Sstevel@tonic-gate 14747c478bd9Sstevel@tonic-gate return (0); 14757c478bd9Sstevel@tonic-gate } 14767c478bd9Sstevel@tonic-gate 14777c478bd9Sstevel@tonic-gate 14787c478bd9Sstevel@tonic-gate /* 14797c478bd9Sstevel@tonic-gate * Process the symbol table for the specified input file. At this point all 14807c478bd9Sstevel@tonic-gate * input sections from this input file have been assigned an input section 14817c478bd9Sstevel@tonic-gate * descriptor which is saved in the `ifl_isdesc' array. 14827c478bd9Sstevel@tonic-gate * 14837c478bd9Sstevel@tonic-gate * o local symbols are saved (as is) if the input file is a 14847c478bd9Sstevel@tonic-gate * relocatable object 14857c478bd9Sstevel@tonic-gate * 14867c478bd9Sstevel@tonic-gate * o global symbols are added to the linkers internal symbol 14877c478bd9Sstevel@tonic-gate * table if they are not already present, otherwise a symbol 14887c478bd9Sstevel@tonic-gate * resolution function is called upon to resolve the conflict. 14897c478bd9Sstevel@tonic-gate */ 14907c478bd9Sstevel@tonic-gate uintptr_t 14917c478bd9Sstevel@tonic-gate sym_process(Is_desc *isc, Ifl_desc *ifl, Ofl_desc *ofl) 14927c478bd9Sstevel@tonic-gate { 14937c478bd9Sstevel@tonic-gate Sym *sym = (Sym *)isc->is_indata->d_buf; 14947c478bd9Sstevel@tonic-gate Word *symshndx = 0; 14957c478bd9Sstevel@tonic-gate Shdr *shdr = isc->is_shdr; 14967c478bd9Sstevel@tonic-gate Sym_desc *sdp; 14977c478bd9Sstevel@tonic-gate size_t strsize; 14987c478bd9Sstevel@tonic-gate char *strs; 14997c478bd9Sstevel@tonic-gate uchar_t type, bind; 15007c478bd9Sstevel@tonic-gate Word ndx, hash, local, total; 15017c478bd9Sstevel@tonic-gate Half etype = ifl->ifl_ehdr->e_type; 15027c478bd9Sstevel@tonic-gate const char *symsecname, *strsecname; 15037c478bd9Sstevel@tonic-gate avl_index_t where; 15047c478bd9Sstevel@tonic-gate 15057c478bd9Sstevel@tonic-gate /* 15067c478bd9Sstevel@tonic-gate * Its possible that a file may contain more that one symbol table, 15077c478bd9Sstevel@tonic-gate * ie. .dynsym and .symtab in a shared library. Only process the first 15087c478bd9Sstevel@tonic-gate * table (here, we assume .dynsym comes before .symtab). 15097c478bd9Sstevel@tonic-gate */ 15107c478bd9Sstevel@tonic-gate if (ifl->ifl_symscnt) 15117c478bd9Sstevel@tonic-gate return (1); 15127c478bd9Sstevel@tonic-gate 15137c478bd9Sstevel@tonic-gate if (isc->is_symshndx) 15147c478bd9Sstevel@tonic-gate symshndx = isc->is_symshndx->is_indata->d_buf; 15157c478bd9Sstevel@tonic-gate 15167c478bd9Sstevel@tonic-gate DBG_CALL(Dbg_syms_process(ifl)); 15177c478bd9Sstevel@tonic-gate 15187c478bd9Sstevel@tonic-gate if (isc->is_name) 15197c478bd9Sstevel@tonic-gate symsecname = isc->is_name; 15207c478bd9Sstevel@tonic-gate else 15217c478bd9Sstevel@tonic-gate symsecname = MSG_ORIG(MSG_STR_EMPTY); 15227c478bd9Sstevel@tonic-gate 15237c478bd9Sstevel@tonic-gate /* 15247c478bd9Sstevel@tonic-gate * From the symbol tables section header information determine which 15257c478bd9Sstevel@tonic-gate * strtab table is needed to locate the actual symbol names. 15267c478bd9Sstevel@tonic-gate */ 15277c478bd9Sstevel@tonic-gate if (ifl->ifl_flags & FLG_IF_HSTRTAB) { 15287c478bd9Sstevel@tonic-gate ndx = shdr->sh_link; 15297c478bd9Sstevel@tonic-gate if ((ndx == 0) || (ndx >= ifl->ifl_shnum)) { 15307c478bd9Sstevel@tonic-gate eprintf(ERR_FATAL, MSG_INTL(MSG_FIL_INVSHLINK), 15317c478bd9Sstevel@tonic-gate ifl->ifl_name, symsecname, EC_XWORD(ndx)); 15327c478bd9Sstevel@tonic-gate return (S_ERROR); 15337c478bd9Sstevel@tonic-gate } 15347c478bd9Sstevel@tonic-gate strsize = ifl->ifl_isdesc[ndx]->is_shdr->sh_size; 15357c478bd9Sstevel@tonic-gate strs = ifl->ifl_isdesc[ndx]->is_indata->d_buf; 15367c478bd9Sstevel@tonic-gate if (ifl->ifl_isdesc[ndx]->is_name) 15377c478bd9Sstevel@tonic-gate strsecname = ifl->ifl_isdesc[ndx]->is_name; 15387c478bd9Sstevel@tonic-gate else 15397c478bd9Sstevel@tonic-gate strsecname = MSG_ORIG(MSG_STR_EMPTY); 15407c478bd9Sstevel@tonic-gate } else { 15417c478bd9Sstevel@tonic-gate /* 15427c478bd9Sstevel@tonic-gate * There is no string table section in this input file 15437c478bd9Sstevel@tonic-gate * although there are symbols in this symbol table section. 15447c478bd9Sstevel@tonic-gate * This means that these symbols do not have names. 15457c478bd9Sstevel@tonic-gate * Currently, only scratch register symbols are allowed 15467c478bd9Sstevel@tonic-gate * not to have names. 15477c478bd9Sstevel@tonic-gate */ 15487c478bd9Sstevel@tonic-gate strsize = 0; 15497c478bd9Sstevel@tonic-gate strs = (char *)MSG_ORIG(MSG_STR_EMPTY); 15507c478bd9Sstevel@tonic-gate strsecname = MSG_ORIG(MSG_STR_EMPTY); 15517c478bd9Sstevel@tonic-gate } 15527c478bd9Sstevel@tonic-gate 15537c478bd9Sstevel@tonic-gate /* 15547c478bd9Sstevel@tonic-gate * Determine the number of local symbols together with the total 15557c478bd9Sstevel@tonic-gate * number we have to process. 15567c478bd9Sstevel@tonic-gate */ 15577c478bd9Sstevel@tonic-gate total = (Word)(shdr->sh_size / shdr->sh_entsize); 15587c478bd9Sstevel@tonic-gate local = shdr->sh_info; 15597c478bd9Sstevel@tonic-gate 15607c478bd9Sstevel@tonic-gate /* 15617c478bd9Sstevel@tonic-gate * Allocate a symbol table index array and a local symbol array 15627c478bd9Sstevel@tonic-gate * (global symbols are processed and added to the ofl->ofl_symbkt[] 15637c478bd9Sstevel@tonic-gate * array). If we are dealing with a relocatable object, allocate the 15647c478bd9Sstevel@tonic-gate * local symbol descriptors. If this isn't a relocatable object we 15657c478bd9Sstevel@tonic-gate * still have to process any shared object locals to determine if any 15667c478bd9Sstevel@tonic-gate * register symbols exist. Although these aren't added to the output 15677c478bd9Sstevel@tonic-gate * image, they are used as part of symbol resolution. 15687c478bd9Sstevel@tonic-gate */ 15697c478bd9Sstevel@tonic-gate if ((ifl->ifl_oldndx = libld_malloc((size_t)(total * 15707c478bd9Sstevel@tonic-gate sizeof (Sym_desc *)))) == 0) 15717c478bd9Sstevel@tonic-gate return (S_ERROR); 15727c478bd9Sstevel@tonic-gate if ((etype == ET_REL) && local) { 15737c478bd9Sstevel@tonic-gate if ((ifl->ifl_locs = 15747c478bd9Sstevel@tonic-gate libld_calloc(sizeof (Sym_desc), local)) == 0) 15757c478bd9Sstevel@tonic-gate return (S_ERROR); 15767c478bd9Sstevel@tonic-gate /* LINTED */ 15777c478bd9Sstevel@tonic-gate ifl->ifl_locscnt = (Word)local; 15787c478bd9Sstevel@tonic-gate } 15797c478bd9Sstevel@tonic-gate ifl->ifl_symscnt = total; 15807c478bd9Sstevel@tonic-gate 15817c478bd9Sstevel@tonic-gate /* 15827c478bd9Sstevel@tonic-gate * If there are local symbols to save add them to the symbol table 15837c478bd9Sstevel@tonic-gate * index array. 15847c478bd9Sstevel@tonic-gate */ 15857c478bd9Sstevel@tonic-gate if (local) { 15867c478bd9Sstevel@tonic-gate for (sym++, ndx = 1; ndx < local; sym++, ndx++) { 15877c478bd9Sstevel@tonic-gate Word shndx, sdflags = FLG_SY_CLEAN; 15887c478bd9Sstevel@tonic-gate const char *name; 15897c478bd9Sstevel@tonic-gate Sym_desc *rsdp; 15907c478bd9Sstevel@tonic-gate 15917c478bd9Sstevel@tonic-gate /* 15927c478bd9Sstevel@tonic-gate * Determine the associated section index. 15937c478bd9Sstevel@tonic-gate */ 15947c478bd9Sstevel@tonic-gate if (symshndx && (sym->st_shndx == SHN_XINDEX)) 15957c478bd9Sstevel@tonic-gate shndx = symshndx[ndx]; 15967c478bd9Sstevel@tonic-gate else if ((shndx = sym->st_shndx) >= SHN_LORESERVE) 15977c478bd9Sstevel@tonic-gate sdflags |= FLG_SY_SPECSEC; 15987c478bd9Sstevel@tonic-gate 15997c478bd9Sstevel@tonic-gate /* 16007c478bd9Sstevel@tonic-gate * Check if st_name has a valid value or not. 16017c478bd9Sstevel@tonic-gate */ 16027c478bd9Sstevel@tonic-gate if ((name = string(ifl, sym, strs, strsize, ndx, 16037c478bd9Sstevel@tonic-gate shndx, symsecname, strsecname, &sdflags)) == 0) { 16047c478bd9Sstevel@tonic-gate ofl->ofl_flags |= FLG_OF_FATAL; 16057c478bd9Sstevel@tonic-gate continue; 16067c478bd9Sstevel@tonic-gate } 16077c478bd9Sstevel@tonic-gate 16087c478bd9Sstevel@tonic-gate /* 16097c478bd9Sstevel@tonic-gate * If this local symbol table originates from a shared 16107c478bd9Sstevel@tonic-gate * object, then we're only interested in recording 16117c478bd9Sstevel@tonic-gate * register symbols. As local symbol descriptors aren't 16127c478bd9Sstevel@tonic-gate * allocated for shared objects, one will be allocated 16137c478bd9Sstevel@tonic-gate * to associated with the register symbol. This symbol 16147c478bd9Sstevel@tonic-gate * won't become part of the output image, but we must 16157c478bd9Sstevel@tonic-gate * process it to test for register conflicts. 16167c478bd9Sstevel@tonic-gate */ 16177c478bd9Sstevel@tonic-gate rsdp = sdp = 0; 16187c478bd9Sstevel@tonic-gate if (sdflags & FLG_SY_REGSYM) { 16197c478bd9Sstevel@tonic-gate if ((rsdp = reg_find(sym, ofl)) != 0) { 16207c478bd9Sstevel@tonic-gate /* 16217c478bd9Sstevel@tonic-gate * The fact that another register def- 16227c478bd9Sstevel@tonic-gate * inition has been found is fatal. 16237c478bd9Sstevel@tonic-gate * Call the verification routine to get 16247c478bd9Sstevel@tonic-gate * the error message and move on. 16257c478bd9Sstevel@tonic-gate */ 16267c478bd9Sstevel@tonic-gate (void) reg_check(rsdp, sym, name, 16277c478bd9Sstevel@tonic-gate ifl, ofl); 16287c478bd9Sstevel@tonic-gate continue; 16297c478bd9Sstevel@tonic-gate } 16307c478bd9Sstevel@tonic-gate 16317c478bd9Sstevel@tonic-gate if (etype == ET_DYN) { 16327c478bd9Sstevel@tonic-gate if ((sdp = libld_calloc( 16337c478bd9Sstevel@tonic-gate sizeof (Sym_desc), 1)) == 0) 16347c478bd9Sstevel@tonic-gate return (S_ERROR); 16357c478bd9Sstevel@tonic-gate sdp->sd_ref = REF_DYN_SEEN; 16367c478bd9Sstevel@tonic-gate } 16377c478bd9Sstevel@tonic-gate } else if (etype == ET_DYN) 16387c478bd9Sstevel@tonic-gate continue; 16397c478bd9Sstevel@tonic-gate 16407c478bd9Sstevel@tonic-gate /* 16417c478bd9Sstevel@tonic-gate * Fill in the remaining symbol descriptor information. 16427c478bd9Sstevel@tonic-gate */ 16437c478bd9Sstevel@tonic-gate if (sdp == 0) { 16447c478bd9Sstevel@tonic-gate sdp = &(ifl->ifl_locs[ndx]); 16457c478bd9Sstevel@tonic-gate sdp->sd_ref = REF_REL_NEED; 16467c478bd9Sstevel@tonic-gate } 16477c478bd9Sstevel@tonic-gate if (rsdp == 0) { 16487c478bd9Sstevel@tonic-gate sdp->sd_name = name; 16497c478bd9Sstevel@tonic-gate sdp->sd_sym = sym; 16507c478bd9Sstevel@tonic-gate sdp->sd_shndx = shndx; 16517c478bd9Sstevel@tonic-gate sdp->sd_flags = sdflags; 16527c478bd9Sstevel@tonic-gate sdp->sd_file = ifl; 16537c478bd9Sstevel@tonic-gate ifl->ifl_oldndx[ndx] = sdp; 16547c478bd9Sstevel@tonic-gate } 16557c478bd9Sstevel@tonic-gate 16567c478bd9Sstevel@tonic-gate DBG_CALL(Dbg_syms_entry(ndx, sdp)); 16577c478bd9Sstevel@tonic-gate 16587c478bd9Sstevel@tonic-gate /* 16597c478bd9Sstevel@tonic-gate * Reclassify any SHN_SUNW_IGNORE symbols to SHN_UNDEF 16607c478bd9Sstevel@tonic-gate * so as to simplify future processing. 16617c478bd9Sstevel@tonic-gate */ 16627c478bd9Sstevel@tonic-gate if (shndx == SHN_SUNW_IGNORE) { 16637c478bd9Sstevel@tonic-gate sdp->sd_shndx = shndx = SHN_UNDEF; 16647c478bd9Sstevel@tonic-gate sdp->sd_flags1 |= 16657c478bd9Sstevel@tonic-gate (FLG_SY1_IGNORE | FLG_SY1_ELIM); 16667c478bd9Sstevel@tonic-gate } 16677c478bd9Sstevel@tonic-gate 16687c478bd9Sstevel@tonic-gate /* 16697c478bd9Sstevel@tonic-gate * Process any register symbols. 16707c478bd9Sstevel@tonic-gate */ 16717c478bd9Sstevel@tonic-gate if (sdp->sd_flags & FLG_SY_REGSYM) { 16727c478bd9Sstevel@tonic-gate /* 16737c478bd9Sstevel@tonic-gate * Add a diagnostic to indicate we've caught a 16747c478bd9Sstevel@tonic-gate * register symbol, as this can be useful if a 16757c478bd9Sstevel@tonic-gate * register conflict is later discovered. 16767c478bd9Sstevel@tonic-gate */ 16777c478bd9Sstevel@tonic-gate DBG_CALL(Dbg_syms_entered(ifl->ifl_ehdr, 16787c478bd9Sstevel@tonic-gate sym, sdp)); 16797c478bd9Sstevel@tonic-gate 16807c478bd9Sstevel@tonic-gate /* 16817c478bd9Sstevel@tonic-gate * If this register symbol hasn't already been 16827c478bd9Sstevel@tonic-gate * recorded, enter it now. 16837c478bd9Sstevel@tonic-gate */ 16847c478bd9Sstevel@tonic-gate if ((rsdp == 0) && (reg_enter(sdp, ofl) == 0)) 16857c478bd9Sstevel@tonic-gate return (S_ERROR); 16867c478bd9Sstevel@tonic-gate } 16877c478bd9Sstevel@tonic-gate 16887c478bd9Sstevel@tonic-gate /* 16897c478bd9Sstevel@tonic-gate * Assign an input section. 16907c478bd9Sstevel@tonic-gate */ 16917c478bd9Sstevel@tonic-gate if ((shndx != SHN_UNDEF) && 16927c478bd9Sstevel@tonic-gate ((sdp->sd_flags & FLG_SY_SPECSEC) == 0)) 16937c478bd9Sstevel@tonic-gate sdp->sd_isc = ifl->ifl_isdesc[shndx]; 16947c478bd9Sstevel@tonic-gate 16957c478bd9Sstevel@tonic-gate /* 16967c478bd9Sstevel@tonic-gate * If this symbol falls within the range of a section 16977c478bd9Sstevel@tonic-gate * being discarded, then discard the symbol itself. 16987c478bd9Sstevel@tonic-gate * There is no reason to keep this local symbol. 16997c478bd9Sstevel@tonic-gate */ 17007c478bd9Sstevel@tonic-gate if (sdp->sd_isc && 17017c478bd9Sstevel@tonic-gate (sdp->sd_isc->is_flags & FLG_IS_DISCARD)) { 17027c478bd9Sstevel@tonic-gate sdp->sd_flags |= FLG_SY_ISDISC; 17037c478bd9Sstevel@tonic-gate DBG_CALL(Dbg_syms_discarded(sdp, sdp->sd_isc)); 17047c478bd9Sstevel@tonic-gate continue; 17057c478bd9Sstevel@tonic-gate } 17067c478bd9Sstevel@tonic-gate 17077c478bd9Sstevel@tonic-gate /* 17087c478bd9Sstevel@tonic-gate * Skip any section symbols as new versions of these 17097c478bd9Sstevel@tonic-gate * will be created. 17107c478bd9Sstevel@tonic-gate */ 17117c478bd9Sstevel@tonic-gate if ((type = ELF_ST_TYPE(sym->st_info)) == STT_SECTION) { 17127c478bd9Sstevel@tonic-gate if (shndx == SHN_UNDEF) { 17137c478bd9Sstevel@tonic-gate eprintf(ERR_WARNING, 17147c478bd9Sstevel@tonic-gate MSG_INTL(MSG_SYM_INVSHNDX), 17157c478bd9Sstevel@tonic-gate demangle(sdp->sd_name), 17167c478bd9Sstevel@tonic-gate ifl->ifl_name, 17177c478bd9Sstevel@tonic-gate conv_shndx_str(shndx)); 17187c478bd9Sstevel@tonic-gate } 17197c478bd9Sstevel@tonic-gate continue; 17207c478bd9Sstevel@tonic-gate } 17217c478bd9Sstevel@tonic-gate 17227c478bd9Sstevel@tonic-gate /* 17237c478bd9Sstevel@tonic-gate * Sanity check for TLS 17247c478bd9Sstevel@tonic-gate */ 17257c478bd9Sstevel@tonic-gate if ((sym->st_size != 0) && 17267c478bd9Sstevel@tonic-gate ((type == STT_TLS) && (shndx != SHN_COMMON))) { 17277c478bd9Sstevel@tonic-gate Is_desc *isp = sdp->sd_isc; 17287c478bd9Sstevel@tonic-gate 17297c478bd9Sstevel@tonic-gate if ((isp == 0) || (isp->is_shdr == 0) || 17307c478bd9Sstevel@tonic-gate ((isp->is_shdr->sh_flags & SHF_TLS) == 0)) { 17317c478bd9Sstevel@tonic-gate eprintf(ERR_FATAL, 17327c478bd9Sstevel@tonic-gate MSG_INTL(MSG_SYM_TLS), 17337c478bd9Sstevel@tonic-gate demangle(sdp->sd_name), 17347c478bd9Sstevel@tonic-gate ifl->ifl_name); 17357c478bd9Sstevel@tonic-gate ofl->ofl_flags |= FLG_OF_FATAL; 17367c478bd9Sstevel@tonic-gate continue; 17377c478bd9Sstevel@tonic-gate } 17387c478bd9Sstevel@tonic-gate } 17397c478bd9Sstevel@tonic-gate 17407c478bd9Sstevel@tonic-gate /* 17417c478bd9Sstevel@tonic-gate * Carry our some basic sanity checks (these are just 17427c478bd9Sstevel@tonic-gate * some of the erroneous symbol entries we've come 17437c478bd9Sstevel@tonic-gate * across, there's probably a lot more). The symbol 17447c478bd9Sstevel@tonic-gate * will not be carried forward to the output file, which 17457c478bd9Sstevel@tonic-gate * won't be a problem unless a relocation is required 17467c478bd9Sstevel@tonic-gate * against it. 17477c478bd9Sstevel@tonic-gate */ 17487c478bd9Sstevel@tonic-gate if (((sdp->sd_flags & FLG_SY_SPECSEC) && 17497c478bd9Sstevel@tonic-gate ((shndx == SHN_COMMON)) || 17507c478bd9Sstevel@tonic-gate ((type == STT_FILE) && (shndx != SHN_ABS))) || 17517c478bd9Sstevel@tonic-gate (sdp->sd_isc && (sdp->sd_isc->is_osdesc == 0))) { 17527c478bd9Sstevel@tonic-gate eprintf(ERR_WARNING, MSG_INTL(MSG_SYM_INVSHNDX), 17537c478bd9Sstevel@tonic-gate demangle(sdp->sd_name), ifl->ifl_name, 17547c478bd9Sstevel@tonic-gate conv_shndx_str(shndx)); 17557c478bd9Sstevel@tonic-gate sdp->sd_isc = NULL; 17567c478bd9Sstevel@tonic-gate sdp->sd_flags |= FLG_SY_INVALID; 17577c478bd9Sstevel@tonic-gate continue; 17587c478bd9Sstevel@tonic-gate } 17597c478bd9Sstevel@tonic-gate 17607c478bd9Sstevel@tonic-gate /* 17617c478bd9Sstevel@tonic-gate * As these local symbols will become part of the output 17627c478bd9Sstevel@tonic-gate * image, record their number and name string size. 17637c478bd9Sstevel@tonic-gate * Globals are counted after all input file processing 17647c478bd9Sstevel@tonic-gate * (and hence symbol resolution) is complete during 17657c478bd9Sstevel@tonic-gate * sym_validate(). 17667c478bd9Sstevel@tonic-gate */ 17677c478bd9Sstevel@tonic-gate if (!(ofl->ofl_flags1 & FLG_OF1_REDLSYM)) { 17687c478bd9Sstevel@tonic-gate ofl->ofl_locscnt++; 17697c478bd9Sstevel@tonic-gate 17707c478bd9Sstevel@tonic-gate if ((((sdp->sd_flags & FLG_SY_REGSYM) == 0) || 17717c478bd9Sstevel@tonic-gate sym->st_name) && (st_insert(ofl->ofl_strtab, 17727c478bd9Sstevel@tonic-gate sdp->sd_name) == -1)) 17737c478bd9Sstevel@tonic-gate return (S_ERROR); 17747c478bd9Sstevel@tonic-gate } 17757c478bd9Sstevel@tonic-gate } 17767c478bd9Sstevel@tonic-gate } 17777c478bd9Sstevel@tonic-gate 17787c478bd9Sstevel@tonic-gate /* 17797c478bd9Sstevel@tonic-gate * Now scan the global symbols entering them in the internal symbol 17807c478bd9Sstevel@tonic-gate * table or resolving them as necessary. 17817c478bd9Sstevel@tonic-gate */ 17827c478bd9Sstevel@tonic-gate sym = (Sym *)isc->is_indata->d_buf; 17837c478bd9Sstevel@tonic-gate sym += local; 17847c478bd9Sstevel@tonic-gate /* LINTED */ 17857c478bd9Sstevel@tonic-gate for (ndx = (int)local; ndx < total; sym++, ndx++) { 17867c478bd9Sstevel@tonic-gate const char *name; 17877c478bd9Sstevel@tonic-gate Word shndx, sdflags = 0; 17887c478bd9Sstevel@tonic-gate 17897c478bd9Sstevel@tonic-gate /* 17907c478bd9Sstevel@tonic-gate * Determine the associated section index. 17917c478bd9Sstevel@tonic-gate */ 17927c478bd9Sstevel@tonic-gate if (symshndx && (sym->st_shndx == SHN_XINDEX)) { 17937c478bd9Sstevel@tonic-gate shndx = symshndx[ndx]; 17947c478bd9Sstevel@tonic-gate } else { 17957c478bd9Sstevel@tonic-gate shndx = sym->st_shndx; 17967c478bd9Sstevel@tonic-gate if (sym->st_shndx >= SHN_LORESERVE) 17977c478bd9Sstevel@tonic-gate sdflags |= FLG_SY_SPECSEC; 17987c478bd9Sstevel@tonic-gate } 17997c478bd9Sstevel@tonic-gate 18007c478bd9Sstevel@tonic-gate /* 18017c478bd9Sstevel@tonic-gate * Check if st_name has a valid value or not. 18027c478bd9Sstevel@tonic-gate */ 18037c478bd9Sstevel@tonic-gate if ((name = string(ifl, sym, strs, strsize, ndx, shndx, 18047c478bd9Sstevel@tonic-gate symsecname, strsecname, &sdflags)) == 0) { 18057c478bd9Sstevel@tonic-gate ofl->ofl_flags |= FLG_OF_FATAL; 18067c478bd9Sstevel@tonic-gate continue; 18077c478bd9Sstevel@tonic-gate } 18087c478bd9Sstevel@tonic-gate 18097c478bd9Sstevel@tonic-gate /* 18107c478bd9Sstevel@tonic-gate * The linker itself will generate symbols for _end, _etext, 18117c478bd9Sstevel@tonic-gate * _edata, _DYNAMIC and _PROCEDURE_LINKAGE_TABLE_, so don't 18127c478bd9Sstevel@tonic-gate * bother entering these symbols from shared objects. This 18137c478bd9Sstevel@tonic-gate * results in some wasted resolution processing, which is hard 18147c478bd9Sstevel@tonic-gate * to feel, but if nothing else, pollutes diagnostic relocation 18157c478bd9Sstevel@tonic-gate * output. 18167c478bd9Sstevel@tonic-gate */ 18177c478bd9Sstevel@tonic-gate if (name[0] && (etype == ET_DYN) && (sym->st_size == 0) && 18187c478bd9Sstevel@tonic-gate (ELF_ST_TYPE(sym->st_info) == STT_OBJECT) && 18197c478bd9Sstevel@tonic-gate (name[0] == '_') && ((name[1] == 'e') || 18207c478bd9Sstevel@tonic-gate (name[1] == 'D') || (name[1] == 'P')) && 18217c478bd9Sstevel@tonic-gate ((strcmp(name, MSG_ORIG(MSG_SYM_ETEXT_U)) == 0) || 18227c478bd9Sstevel@tonic-gate (strcmp(name, MSG_ORIG(MSG_SYM_EDATA_U)) == 0) || 18237c478bd9Sstevel@tonic-gate (strcmp(name, MSG_ORIG(MSG_SYM_END_U)) == 0) || 18247c478bd9Sstevel@tonic-gate (strcmp(name, MSG_ORIG(MSG_SYM_DYNAMIC_U)) == 0) || 18257c478bd9Sstevel@tonic-gate (strcmp(name, MSG_ORIG(MSG_SYM_PLKTBL_U)) == 0))) { 18267c478bd9Sstevel@tonic-gate ifl->ifl_oldndx[ndx] = 0; 18277c478bd9Sstevel@tonic-gate continue; 18287c478bd9Sstevel@tonic-gate } 18297c478bd9Sstevel@tonic-gate 18307c478bd9Sstevel@tonic-gate /* 18317c478bd9Sstevel@tonic-gate * Determine and validate the symbols binding. 18327c478bd9Sstevel@tonic-gate */ 18337c478bd9Sstevel@tonic-gate bind = ELF_ST_BIND(sym->st_info); 18347c478bd9Sstevel@tonic-gate if ((bind != STB_GLOBAL) && (bind != STB_WEAK)) { 18357c478bd9Sstevel@tonic-gate eprintf(ERR_WARNING, MSG_INTL(MSG_SYM_NONGLOB), 18367c478bd9Sstevel@tonic-gate demangle(name), ifl->ifl_name, 18377c478bd9Sstevel@tonic-gate conv_info_bind_str(bind)); 18387c478bd9Sstevel@tonic-gate continue; 18397c478bd9Sstevel@tonic-gate } 18407c478bd9Sstevel@tonic-gate 18417c478bd9Sstevel@tonic-gate /* 18427c478bd9Sstevel@tonic-gate * If this symbol falls within the range of a section being 18437c478bd9Sstevel@tonic-gate * discarded, then discard the symbol itself. 18447c478bd9Sstevel@tonic-gate */ 18457c478bd9Sstevel@tonic-gate if (((sdflags & FLG_SY_SPECSEC) == 0) && 18467c478bd9Sstevel@tonic-gate (shndx != SHN_UNDEF)) { 18477c478bd9Sstevel@tonic-gate Is_desc *isp; 18487c478bd9Sstevel@tonic-gate 18497c478bd9Sstevel@tonic-gate if (shndx >= ifl->ifl_shnum) { 18507c478bd9Sstevel@tonic-gate /* 18517c478bd9Sstevel@tonic-gate * Carry our some basic sanity checks 18527c478bd9Sstevel@tonic-gate * The symbol will not be carried forward to 18537c478bd9Sstevel@tonic-gate * the output file, which won't be a problem 18547c478bd9Sstevel@tonic-gate * unless a relocation is required against it. 18557c478bd9Sstevel@tonic-gate */ 18567c478bd9Sstevel@tonic-gate eprintf(ERR_WARNING, MSG_INTL(MSG_SYM_INVSHNDX), 18577c478bd9Sstevel@tonic-gate demangle(name), ifl->ifl_name, 18587c478bd9Sstevel@tonic-gate conv_shndx_str(shndx)); 18597c478bd9Sstevel@tonic-gate continue; 18607c478bd9Sstevel@tonic-gate } 18617c478bd9Sstevel@tonic-gate 18627c478bd9Sstevel@tonic-gate isp = ifl->ifl_isdesc[shndx]; 18637c478bd9Sstevel@tonic-gate if (isp && (isp->is_flags & FLG_IS_DISCARD)) { 18647c478bd9Sstevel@tonic-gate if ((sdp = 18657c478bd9Sstevel@tonic-gate libld_calloc(sizeof (Sym_desc), 1)) == 0) 18667c478bd9Sstevel@tonic-gate return (S_ERROR); 18677c478bd9Sstevel@tonic-gate 18687c478bd9Sstevel@tonic-gate /* 18697c478bd9Sstevel@tonic-gate * Create a dummy symbol entry so that if we 18707c478bd9Sstevel@tonic-gate * find any references to this discarded symbol 18717c478bd9Sstevel@tonic-gate * we can compensate. 18727c478bd9Sstevel@tonic-gate */ 18737c478bd9Sstevel@tonic-gate sdp->sd_name = name; 18747c478bd9Sstevel@tonic-gate sdp->sd_sym = sym; 18757c478bd9Sstevel@tonic-gate sdp->sd_file = ifl; 18767c478bd9Sstevel@tonic-gate sdp->sd_isc = isp; 18777c478bd9Sstevel@tonic-gate sdp->sd_flags = FLG_SY_ISDISC; 18787c478bd9Sstevel@tonic-gate ifl->ifl_oldndx[ndx] = sdp; 18797c478bd9Sstevel@tonic-gate 18807c478bd9Sstevel@tonic-gate DBG_CALL(Dbg_syms_discarded(sdp, sdp->sd_isc)); 18817c478bd9Sstevel@tonic-gate continue; 18827c478bd9Sstevel@tonic-gate } 18837c478bd9Sstevel@tonic-gate } 18847c478bd9Sstevel@tonic-gate 18857c478bd9Sstevel@tonic-gate /* 18867c478bd9Sstevel@tonic-gate * If the symbol does not already exist in the internal symbol 18877c478bd9Sstevel@tonic-gate * table add it, otherwise resolve the conflict. If the symbol 18887c478bd9Sstevel@tonic-gate * from this file is kept, retain its symbol table index for 18897c478bd9Sstevel@tonic-gate * possible use in associating a global alias. 18907c478bd9Sstevel@tonic-gate */ 18917c478bd9Sstevel@tonic-gate /* LINTED */ 18927c478bd9Sstevel@tonic-gate hash = (Word)elf_hash((const char *)name); 18937c478bd9Sstevel@tonic-gate if ((sdp = sym_find(name, hash, &where, ofl)) == NULL) { 18947c478bd9Sstevel@tonic-gate DBG_CALL(Dbg_syms_global(ndx, name)); 18957c478bd9Sstevel@tonic-gate if ((sdp = sym_enter(name, sym, hash, ifl, ofl, ndx, 18967c478bd9Sstevel@tonic-gate shndx, sdflags, 0, &where)) == (Sym_desc *)S_ERROR) 18977c478bd9Sstevel@tonic-gate return (S_ERROR); 18987c478bd9Sstevel@tonic-gate 18997c478bd9Sstevel@tonic-gate } else if (sym_resolve(sdp, sym, ifl, ofl, ndx, shndx, 19007c478bd9Sstevel@tonic-gate sdflags) == S_ERROR) 19017c478bd9Sstevel@tonic-gate return (S_ERROR); 19027c478bd9Sstevel@tonic-gate 19037c478bd9Sstevel@tonic-gate /* 19047c478bd9Sstevel@tonic-gate * After we've compared a defined symbol in one shared 19057c478bd9Sstevel@tonic-gate * object, flag the symbol so we don't compare it again. 19067c478bd9Sstevel@tonic-gate */ 19077c478bd9Sstevel@tonic-gate if ((etype == ET_DYN) && (shndx != SHN_UNDEF) && 19087c478bd9Sstevel@tonic-gate ((sdp->sd_flags & FLG_SY_SOFOUND) == 0)) 19097c478bd9Sstevel@tonic-gate sdp->sd_flags |= FLG_SY_SOFOUND; 19107c478bd9Sstevel@tonic-gate 19117c478bd9Sstevel@tonic-gate /* 19127c478bd9Sstevel@tonic-gate * If the symbol is accepted from this file retain the symbol 19137c478bd9Sstevel@tonic-gate * index for possible use in aliasing. 19147c478bd9Sstevel@tonic-gate */ 19157c478bd9Sstevel@tonic-gate if (sdp->sd_file == ifl) 19167c478bd9Sstevel@tonic-gate sdp->sd_symndx = ndx; 19177c478bd9Sstevel@tonic-gate 19187c478bd9Sstevel@tonic-gate ifl->ifl_oldndx[ndx] = sdp; 19197c478bd9Sstevel@tonic-gate 19207c478bd9Sstevel@tonic-gate /* 19217c478bd9Sstevel@tonic-gate * If we've accepted a register symbol, continue to validate 19227c478bd9Sstevel@tonic-gate * it. 19237c478bd9Sstevel@tonic-gate */ 19247c478bd9Sstevel@tonic-gate if (sdp->sd_flags & FLG_SY_REGSYM) { 19257c478bd9Sstevel@tonic-gate Sym_desc *rsdp; 19267c478bd9Sstevel@tonic-gate 19277c478bd9Sstevel@tonic-gate if ((rsdp = reg_find(sdp->sd_sym, ofl)) == 0) { 19287c478bd9Sstevel@tonic-gate if (reg_enter(sdp, ofl) == 0) 19297c478bd9Sstevel@tonic-gate return (S_ERROR); 19307c478bd9Sstevel@tonic-gate } else if (rsdp != sdp) { 19317c478bd9Sstevel@tonic-gate (void) reg_check(rsdp, sdp->sd_sym, 19327c478bd9Sstevel@tonic-gate sdp->sd_name, ifl, ofl); 19337c478bd9Sstevel@tonic-gate } 19347c478bd9Sstevel@tonic-gate } 19357c478bd9Sstevel@tonic-gate } 19367c478bd9Sstevel@tonic-gate 19377c478bd9Sstevel@tonic-gate /* 19387c478bd9Sstevel@tonic-gate * If this is a shared object scan the globals one more time and 19397c478bd9Sstevel@tonic-gate * associate any weak/global associations. This association is needed 19407c478bd9Sstevel@tonic-gate * should the weak definition satisfy a reference in the dynamic 19417c478bd9Sstevel@tonic-gate * executable: 19427c478bd9Sstevel@tonic-gate * 19437c478bd9Sstevel@tonic-gate * o if the symbol is a data item it will be copied to the 19447c478bd9Sstevel@tonic-gate * executables address space, thus we must also reassociate the 19457c478bd9Sstevel@tonic-gate * alias symbol with its new location in the executable. 19467c478bd9Sstevel@tonic-gate * 19477c478bd9Sstevel@tonic-gate * o if the symbol is a function then we may need to promote the 19487c478bd9Sstevel@tonic-gate * symbols binding from undefined weak to undefined, otherwise the 19497c478bd9Sstevel@tonic-gate * run-time linker will not generate the correct relocation error 19507c478bd9Sstevel@tonic-gate * should the symbol not be found. 19517c478bd9Sstevel@tonic-gate * 19527c478bd9Sstevel@tonic-gate * The true association between a weak/strong symbol pair is that both 19537c478bd9Sstevel@tonic-gate * symbol entries are identical, thus first we created a sorted symbol 19547c478bd9Sstevel@tonic-gate * list keyed off of the symbols value (if the value is the same chances 19557c478bd9Sstevel@tonic-gate * are the rest of the symbols data is). This list is then scanned for 19567c478bd9Sstevel@tonic-gate * weak symbols, and if one is found then any strong association will 19577c478bd9Sstevel@tonic-gate * exist in the following entries. Thus we just have to scan one 19587c478bd9Sstevel@tonic-gate * (typical single alias) or more (in the uncommon instance of multiple 19597c478bd9Sstevel@tonic-gate * weak to strong associations) entries to determine if a match exists. 19607c478bd9Sstevel@tonic-gate */ 19617c478bd9Sstevel@tonic-gate if (ifl->ifl_ehdr->e_type == ET_DYN) { 19627c478bd9Sstevel@tonic-gate Sym_desc ** sort; 19637c478bd9Sstevel@tonic-gate size_t size = (total - local) * sizeof (Sym_desc *); 19647c478bd9Sstevel@tonic-gate 19657c478bd9Sstevel@tonic-gate if ((sort = libld_malloc(size)) == 0) 19667c478bd9Sstevel@tonic-gate return (S_ERROR); 19677c478bd9Sstevel@tonic-gate (void) memcpy((void *)sort, &ifl->ifl_oldndx[local], size); 19687c478bd9Sstevel@tonic-gate 19697c478bd9Sstevel@tonic-gate qsort(sort, (total - local), sizeof (Sym_desc *), compare); 19707c478bd9Sstevel@tonic-gate 19717c478bd9Sstevel@tonic-gate for (ndx = 0; ndx < (total - local); ndx++) { 19727c478bd9Sstevel@tonic-gate Sym_desc * wsdp = sort[ndx]; 19737c478bd9Sstevel@tonic-gate Sym * wsym; 19747c478bd9Sstevel@tonic-gate int sndx; 19757c478bd9Sstevel@tonic-gate 19767c478bd9Sstevel@tonic-gate if (wsdp == 0) 19777c478bd9Sstevel@tonic-gate continue; 19787c478bd9Sstevel@tonic-gate 19797c478bd9Sstevel@tonic-gate wsym = wsdp->sd_sym; 19807c478bd9Sstevel@tonic-gate 19817c478bd9Sstevel@tonic-gate if ((ELF_ST_BIND(wsym->st_info) != STB_WEAK) || 19827c478bd9Sstevel@tonic-gate (wsdp->sd_shndx == SHN_UNDEF) || 19837c478bd9Sstevel@tonic-gate (wsdp->sd_flags & FLG_SY_SPECSEC)) 19847c478bd9Sstevel@tonic-gate continue; 19857c478bd9Sstevel@tonic-gate 19867c478bd9Sstevel@tonic-gate /* 19877c478bd9Sstevel@tonic-gate * We have a weak symbol, if it has a strong alias it 19887c478bd9Sstevel@tonic-gate * will have been sorted to one of the following sort 19897c478bd9Sstevel@tonic-gate * table entries. Note that we could have multiple weak 19907c478bd9Sstevel@tonic-gate * symbols aliased to one strong (if this occurs then 19917c478bd9Sstevel@tonic-gate * the strong symbol only maintains one alias back to 19927c478bd9Sstevel@tonic-gate * the last weak). 19937c478bd9Sstevel@tonic-gate */ 19947c478bd9Sstevel@tonic-gate for (sndx = ndx + 1; sndx < (total - local); sndx++) { 19957c478bd9Sstevel@tonic-gate Sym_desc * ssdp = sort[sndx]; 19967c478bd9Sstevel@tonic-gate Sym * ssym; 19977c478bd9Sstevel@tonic-gate 19987c478bd9Sstevel@tonic-gate if (ssdp == 0) 19997c478bd9Sstevel@tonic-gate break; 20007c478bd9Sstevel@tonic-gate 20017c478bd9Sstevel@tonic-gate ssym = ssdp->sd_sym; 20027c478bd9Sstevel@tonic-gate 20037c478bd9Sstevel@tonic-gate if (wsym->st_value != ssym->st_value) 20047c478bd9Sstevel@tonic-gate break; 20057c478bd9Sstevel@tonic-gate 20067c478bd9Sstevel@tonic-gate if ((ssdp->sd_file == ifl) && 20077c478bd9Sstevel@tonic-gate (wsdp->sd_file == ifl) && 20087c478bd9Sstevel@tonic-gate (wsym->st_size == ssym->st_size) && 20097c478bd9Sstevel@tonic-gate (ssdp->sd_shndx != SHN_UNDEF) && 20107c478bd9Sstevel@tonic-gate (ELF_ST_BIND(ssym->st_info) != STB_WEAK) && 20117c478bd9Sstevel@tonic-gate ((ssdp->sd_flags & FLG_SY_SPECSEC) == 0)) { 20127c478bd9Sstevel@tonic-gate ssdp->sd_aux->sa_linkndx = 20137c478bd9Sstevel@tonic-gate (Word)wsdp->sd_symndx; 20147c478bd9Sstevel@tonic-gate wsdp->sd_aux->sa_linkndx = 20157c478bd9Sstevel@tonic-gate (Word)ssdp->sd_symndx; 20167c478bd9Sstevel@tonic-gate break; 20177c478bd9Sstevel@tonic-gate } 20187c478bd9Sstevel@tonic-gate } 20197c478bd9Sstevel@tonic-gate } 20207c478bd9Sstevel@tonic-gate } 20217c478bd9Sstevel@tonic-gate return (1); 20227c478bd9Sstevel@tonic-gate } 20237c478bd9Sstevel@tonic-gate 20247c478bd9Sstevel@tonic-gate /* 20257c478bd9Sstevel@tonic-gate * Add an undefined symbol to the symbol table (ie. from -u name option) 20267c478bd9Sstevel@tonic-gate */ 20277c478bd9Sstevel@tonic-gate Sym_desc * 20287c478bd9Sstevel@tonic-gate sym_add_u(const char *name, Ofl_desc *ofl) 20297c478bd9Sstevel@tonic-gate { 20307c478bd9Sstevel@tonic-gate Sym *sym; 20317c478bd9Sstevel@tonic-gate Ifl_desc *ifl = 0, *_ifl; 20327c478bd9Sstevel@tonic-gate Sym_desc *sdp; 20337c478bd9Sstevel@tonic-gate Word hash; 20347c478bd9Sstevel@tonic-gate Listnode *lnp; 20357c478bd9Sstevel@tonic-gate avl_index_t where; 20367c478bd9Sstevel@tonic-gate const char *cmdline = MSG_INTL(MSG_STR_COMMAND); 20377c478bd9Sstevel@tonic-gate 20387c478bd9Sstevel@tonic-gate /* 20397c478bd9Sstevel@tonic-gate * If the symbol reference already exists indicate that a reference 20407c478bd9Sstevel@tonic-gate * also came from the command line. 20417c478bd9Sstevel@tonic-gate */ 20427c478bd9Sstevel@tonic-gate /* LINTED */ 20437c478bd9Sstevel@tonic-gate hash = (Word)elf_hash(name); 20447c478bd9Sstevel@tonic-gate if (sdp = sym_find(name, hash, &where, ofl)) { 20457c478bd9Sstevel@tonic-gate if (sdp->sd_ref == REF_DYN_SEEN) 20467c478bd9Sstevel@tonic-gate sdp->sd_ref = REF_DYN_NEED; 20477c478bd9Sstevel@tonic-gate return (sdp); 20487c478bd9Sstevel@tonic-gate } 20497c478bd9Sstevel@tonic-gate 20507c478bd9Sstevel@tonic-gate /* 20517c478bd9Sstevel@tonic-gate * Determine whether a pseudo input file descriptor exists to represent 20527c478bd9Sstevel@tonic-gate * the command line, as any global symbol needs an input file descriptor 20537c478bd9Sstevel@tonic-gate * during any symbol resolution (refer to map_ifl() which provides a 20547c478bd9Sstevel@tonic-gate * similar method for adding symbols from mapfiles). 20557c478bd9Sstevel@tonic-gate */ 20567c478bd9Sstevel@tonic-gate for (LIST_TRAVERSE(&ofl->ofl_objs, lnp, _ifl)) 20577c478bd9Sstevel@tonic-gate if (strcmp(_ifl->ifl_name, cmdline) == 0) { 20587c478bd9Sstevel@tonic-gate ifl = _ifl; 20597c478bd9Sstevel@tonic-gate break; 20607c478bd9Sstevel@tonic-gate } 20617c478bd9Sstevel@tonic-gate 20627c478bd9Sstevel@tonic-gate /* 20637c478bd9Sstevel@tonic-gate * If no descriptor exists create one. 20647c478bd9Sstevel@tonic-gate */ 20657c478bd9Sstevel@tonic-gate if (ifl == 0) { 20667c478bd9Sstevel@tonic-gate if ((ifl = libld_calloc(sizeof (Ifl_desc), 1)) == 20677c478bd9Sstevel@tonic-gate (Ifl_desc *)0) 20687c478bd9Sstevel@tonic-gate return ((Sym_desc *)S_ERROR); 20697c478bd9Sstevel@tonic-gate ifl->ifl_name = cmdline; 20707c478bd9Sstevel@tonic-gate ifl->ifl_flags = FLG_IF_NEEDED | FLG_IF_FILEREF; 20717c478bd9Sstevel@tonic-gate if ((ifl->ifl_ehdr = libld_calloc(sizeof (Ehdr), 20727c478bd9Sstevel@tonic-gate 1)) == 0) 20737c478bd9Sstevel@tonic-gate return ((Sym_desc *)S_ERROR); 20747c478bd9Sstevel@tonic-gate ifl->ifl_ehdr->e_type = ET_REL; 20757c478bd9Sstevel@tonic-gate 20767c478bd9Sstevel@tonic-gate if (list_appendc(&ofl->ofl_objs, ifl) == 0) 20777c478bd9Sstevel@tonic-gate return ((Sym_desc *)S_ERROR); 20787c478bd9Sstevel@tonic-gate } 20797c478bd9Sstevel@tonic-gate 20807c478bd9Sstevel@tonic-gate /* 20817c478bd9Sstevel@tonic-gate * Allocate a symbol structure and add it to the global symbol table. 20827c478bd9Sstevel@tonic-gate */ 20837c478bd9Sstevel@tonic-gate if ((sym = libld_calloc(sizeof (Sym), 1)) == 0) 20847c478bd9Sstevel@tonic-gate return ((Sym_desc *)S_ERROR); 20857c478bd9Sstevel@tonic-gate sym->st_info = ELF_ST_INFO(STB_GLOBAL, STT_NOTYPE); 20867c478bd9Sstevel@tonic-gate sym->st_shndx = SHN_UNDEF; 20877c478bd9Sstevel@tonic-gate 20887c478bd9Sstevel@tonic-gate DBG_CALL(Dbg_syms_process(ifl)); 20897c478bd9Sstevel@tonic-gate DBG_CALL(Dbg_syms_global(0, name)); 20907c478bd9Sstevel@tonic-gate sdp = sym_enter(name, sym, hash, ifl, ofl, 0, SHN_UNDEF, 0, 0, &where); 20917c478bd9Sstevel@tonic-gate sdp->sd_flags &= ~FLG_SY_CLEAN; 20927c478bd9Sstevel@tonic-gate sdp->sd_flags |= FLG_SY_CMDREF; 20937c478bd9Sstevel@tonic-gate 20947c478bd9Sstevel@tonic-gate return (sdp); 20957c478bd9Sstevel@tonic-gate } 2096