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 5*0bc07c75Srie * Common Development and Distribution License (the "License"). 6*0bc07c75Srie * You may not use this file except in compliance with the License. 77c478bd9Sstevel@tonic-gate * 87c478bd9Sstevel@tonic-gate * You can obtain a copy of the license at usr/src/OPENSOLARIS.LICENSE 97c478bd9Sstevel@tonic-gate * or http://www.opensolaris.org/os/licensing. 107c478bd9Sstevel@tonic-gate * See the License for the specific language governing permissions 117c478bd9Sstevel@tonic-gate * and limitations under the License. 127c478bd9Sstevel@tonic-gate * 137c478bd9Sstevel@tonic-gate * When distributing Covered Code, include this CDDL HEADER in each 147c478bd9Sstevel@tonic-gate * file and include the License file at usr/src/OPENSOLARIS.LICENSE. 157c478bd9Sstevel@tonic-gate * If applicable, add the following below this CDDL HEADER, with the 167c478bd9Sstevel@tonic-gate * fields enclosed by brackets "[]" replaced with your own identifying 177c478bd9Sstevel@tonic-gate * information: Portions Copyright [yyyy] [name of copyright owner] 187c478bd9Sstevel@tonic-gate * 197c478bd9Sstevel@tonic-gate * CDDL HEADER END 207c478bd9Sstevel@tonic-gate */ 217c478bd9Sstevel@tonic-gate 227c478bd9Sstevel@tonic-gate /* 23*0bc07c75Srie * Copyright (c) 1988 AT&T 24*0bc07c75Srie * All Rights Reserved 25*0bc07c75Srie * 26*0bc07c75Srie * 27*0bc07c75Srie * Copyright 2006 Sun Microsystems, Inc. All rights reserved. 287c478bd9Sstevel@tonic-gate * Use is subject to license terms. 297c478bd9Sstevel@tonic-gate */ 307c478bd9Sstevel@tonic-gate 317c478bd9Sstevel@tonic-gate #pragma ident "%Z%%M% %I% %E% SMI" 327c478bd9Sstevel@tonic-gate 337c478bd9Sstevel@tonic-gate #if !defined(_ELF64) 347c478bd9Sstevel@tonic-gate #pragma weak elf_update = _elf_update 357c478bd9Sstevel@tonic-gate #endif 367c478bd9Sstevel@tonic-gate 377c478bd9Sstevel@tonic-gate #include "syn.h" 387c478bd9Sstevel@tonic-gate #include <memory.h> 397c478bd9Sstevel@tonic-gate #include <malloc.h> 407c478bd9Sstevel@tonic-gate #include <limits.h> 417c478bd9Sstevel@tonic-gate 427c478bd9Sstevel@tonic-gate #include <sgs.h> 437c478bd9Sstevel@tonic-gate #include "decl.h" 447c478bd9Sstevel@tonic-gate #include "msg.h" 457c478bd9Sstevel@tonic-gate 467c478bd9Sstevel@tonic-gate /* 477c478bd9Sstevel@tonic-gate * This module is compiled twice, the second time having 487c478bd9Sstevel@tonic-gate * -D_ELF64 defined. The following set of macros, along 497c478bd9Sstevel@tonic-gate * with machelf.h, represent the differences between the 507c478bd9Sstevel@tonic-gate * two compilations. Be careful *not* to add any class- 517c478bd9Sstevel@tonic-gate * dependent code (anything that has elf32 or elf64 in the 527c478bd9Sstevel@tonic-gate * name) to this code without hiding it behind a switch- 537c478bd9Sstevel@tonic-gate * able macro like these. 547c478bd9Sstevel@tonic-gate */ 557c478bd9Sstevel@tonic-gate #if defined(_ELF64) 567c478bd9Sstevel@tonic-gate 577c478bd9Sstevel@tonic-gate #define FSZ_LONG ELF64_FSZ_XWORD 587c478bd9Sstevel@tonic-gate #define ELFCLASS ELFCLASS64 597c478bd9Sstevel@tonic-gate #define _elf_snode_init _elf64_snode_init 607c478bd9Sstevel@tonic-gate #define _elfxx_cookscn _elf64_cookscn 617c478bd9Sstevel@tonic-gate #define _elf_upd_lib _elf64_upd_lib 627c478bd9Sstevel@tonic-gate #define elf_fsize elf64_fsize 637c478bd9Sstevel@tonic-gate #define _elf_entsz _elf64_entsz 647c478bd9Sstevel@tonic-gate #define _elf_msize _elf64_msize 657c478bd9Sstevel@tonic-gate #define _elf_upd_usr _elf64_upd_usr 667c478bd9Sstevel@tonic-gate #define wrt wrt64 677c478bd9Sstevel@tonic-gate #define elf_xlatetof elf64_xlatetof 687c478bd9Sstevel@tonic-gate #define _elfxx_update _elf64_update 697c478bd9Sstevel@tonic-gate 707c478bd9Sstevel@tonic-gate #else /* ELF32 */ 717c478bd9Sstevel@tonic-gate 727c478bd9Sstevel@tonic-gate #define FSZ_LONG ELF32_FSZ_WORD 737c478bd9Sstevel@tonic-gate #define ELFCLASS ELFCLASS32 747c478bd9Sstevel@tonic-gate #define _elf_snode_init _elf32_snode_init 757c478bd9Sstevel@tonic-gate #define _elfxx_cookscn _elf32_cookscn 767c478bd9Sstevel@tonic-gate #define _elf_upd_lib _elf32_upd_lib 777c478bd9Sstevel@tonic-gate #define elf_fsize elf32_fsize 787c478bd9Sstevel@tonic-gate #define _elf_entsz _elf32_entsz 797c478bd9Sstevel@tonic-gate #define _elf_msize _elf32_msize 807c478bd9Sstevel@tonic-gate #define _elf_upd_usr _elf32_upd_usr 817c478bd9Sstevel@tonic-gate #define wrt wrt32 827c478bd9Sstevel@tonic-gate #define elf_xlatetof elf32_xlatetof 837c478bd9Sstevel@tonic-gate #define _elfxx_update _elf32_update 847c478bd9Sstevel@tonic-gate 857c478bd9Sstevel@tonic-gate #endif /* ELF64 */ 867c478bd9Sstevel@tonic-gate 877c478bd9Sstevel@tonic-gate 887c478bd9Sstevel@tonic-gate /* 897c478bd9Sstevel@tonic-gate * Output file update 907c478bd9Sstevel@tonic-gate * These functions walk an Elf structure, update its information, 917c478bd9Sstevel@tonic-gate * and optionally write the output file. Because the application 927c478bd9Sstevel@tonic-gate * may control of the output file layout, two upd_... routines 937c478bd9Sstevel@tonic-gate * exist. They're similar but too different to merge cleanly. 947c478bd9Sstevel@tonic-gate * 957c478bd9Sstevel@tonic-gate * The library defines a "dirty" bit to force parts of the file 967c478bd9Sstevel@tonic-gate * to be written on update. These routines ignore the dirty bit 977c478bd9Sstevel@tonic-gate * and do everything. A minimal update routine might be useful 987c478bd9Sstevel@tonic-gate * someday. 997c478bd9Sstevel@tonic-gate */ 1007c478bd9Sstevel@tonic-gate 1017c478bd9Sstevel@tonic-gate static size_t 1027c478bd9Sstevel@tonic-gate _elf_upd_lib(Elf * elf) 1037c478bd9Sstevel@tonic-gate { 1047c478bd9Sstevel@tonic-gate NOTE(ASSUMING_PROTECTED(*elf)) 1057c478bd9Sstevel@tonic-gate Lword hi; 1067c478bd9Sstevel@tonic-gate Lword hibit; 1077c478bd9Sstevel@tonic-gate Elf_Scn * s; 1087c478bd9Sstevel@tonic-gate register Xword sz; 1097c478bd9Sstevel@tonic-gate Ehdr * eh = elf->ed_ehdr; 1107c478bd9Sstevel@tonic-gate unsigned ver = eh->e_version; 1117c478bd9Sstevel@tonic-gate register char *p = (char *)eh->e_ident; 1127c478bd9Sstevel@tonic-gate size_t scncnt; 1137c478bd9Sstevel@tonic-gate 1147c478bd9Sstevel@tonic-gate /* 1157c478bd9Sstevel@tonic-gate * Ehdr and Phdr table go first 1167c478bd9Sstevel@tonic-gate */ 1177c478bd9Sstevel@tonic-gate p[EI_MAG0] = ELFMAG0; 1187c478bd9Sstevel@tonic-gate p[EI_MAG1] = ELFMAG1; 1197c478bd9Sstevel@tonic-gate p[EI_MAG2] = ELFMAG2; 1207c478bd9Sstevel@tonic-gate p[EI_MAG3] = ELFMAG3; 1217c478bd9Sstevel@tonic-gate p[EI_CLASS] = ELFCLASS; 1227c478bd9Sstevel@tonic-gate /* LINTED */ 1237c478bd9Sstevel@tonic-gate p[EI_VERSION] = (Byte)ver; 1247c478bd9Sstevel@tonic-gate hi = elf_fsize(ELF_T_EHDR, 1, ver); 1257c478bd9Sstevel@tonic-gate /* LINTED */ 1267c478bd9Sstevel@tonic-gate eh->e_ehsize = (Half)hi; 1277c478bd9Sstevel@tonic-gate if (eh->e_phnum != 0) { 1287c478bd9Sstevel@tonic-gate /* LINTED */ 1297c478bd9Sstevel@tonic-gate eh->e_phentsize = (Half)elf_fsize(ELF_T_PHDR, 1, ver); 1307c478bd9Sstevel@tonic-gate /* LINTED */ 1317c478bd9Sstevel@tonic-gate eh->e_phoff = (Off)hi; 1327c478bd9Sstevel@tonic-gate hi += eh->e_phentsize * eh->e_phnum; 1337c478bd9Sstevel@tonic-gate } else { 1347c478bd9Sstevel@tonic-gate eh->e_phoff = 0; 1357c478bd9Sstevel@tonic-gate eh->e_phentsize = 0; 1367c478bd9Sstevel@tonic-gate } 1377c478bd9Sstevel@tonic-gate 1387c478bd9Sstevel@tonic-gate /* 139*0bc07c75Srie * Obtain the first section header. Typically, this section has NULL 140*0bc07c75Srie * contents, however in the case of Extended ELF Sections this section 141*0bc07c75Srie * is used to hold an alternative e_shnum, e_shstrndx and e_phnum. 142*0bc07c75Srie * On initial allocation (see _elf_snode) the elements of this section 143*0bc07c75Srie * would have been zeroed. The e_shnum is initialized later, after the 144*0bc07c75Srie * section header count has been determined. The e_shstrndx and 145*0bc07c75Srie * e_phnum may have already been initialized by the caller (for example, 146*0bc07c75Srie * gelf_update_shdr() in mcs(1)). 1477c478bd9Sstevel@tonic-gate */ 1487c478bd9Sstevel@tonic-gate if ((s = elf->ed_hdscn) == 0) { 1497c478bd9Sstevel@tonic-gate eh->e_shnum = 0; 1507c478bd9Sstevel@tonic-gate scncnt = 0; 1517c478bd9Sstevel@tonic-gate } else { 1527c478bd9Sstevel@tonic-gate s = s->s_next; 153*0bc07c75Srie scncnt = 1; 1547c478bd9Sstevel@tonic-gate } 1557c478bd9Sstevel@tonic-gate 156*0bc07c75Srie /* 157*0bc07c75Srie * Loop through sections. Compute section size before changing hi. 158*0bc07c75Srie * Allow null buffers for NOBITS. 159*0bc07c75Srie */ 1607c478bd9Sstevel@tonic-gate hibit = 0; 1617c478bd9Sstevel@tonic-gate for (; s != 0; s = s->s_next) { 1627c478bd9Sstevel@tonic-gate register Dnode *d; 1637c478bd9Sstevel@tonic-gate register Lword fsz, j; 1647c478bd9Sstevel@tonic-gate Shdr *sh = s->s_shdr; 1657c478bd9Sstevel@tonic-gate 1667c478bd9Sstevel@tonic-gate scncnt++; 1677c478bd9Sstevel@tonic-gate if (sh->sh_type == SHT_NULL) { 1687c478bd9Sstevel@tonic-gate *sh = _elf_snode_init.sb_shdr; 1697c478bd9Sstevel@tonic-gate continue; 1707c478bd9Sstevel@tonic-gate } 1717c478bd9Sstevel@tonic-gate 1727c478bd9Sstevel@tonic-gate if ((s->s_myflags & SF_READY) == 0) 1737c478bd9Sstevel@tonic-gate (void) _elfxx_cookscn(s); 1747c478bd9Sstevel@tonic-gate 1757c478bd9Sstevel@tonic-gate sh->sh_addralign = 1; 1767c478bd9Sstevel@tonic-gate if ((sz = (Xword)_elf_entsz(sh->sh_type, ver)) != 0) 1777c478bd9Sstevel@tonic-gate /* LINTED */ 1787c478bd9Sstevel@tonic-gate sh->sh_entsize = (Half)sz; 1797c478bd9Sstevel@tonic-gate sz = 0; 1807c478bd9Sstevel@tonic-gate for (d = s->s_hdnode; d != 0; d = d->db_next) { 1817c478bd9Sstevel@tonic-gate if ((fsz = elf_fsize(d->db_data.d_type, 1827c478bd9Sstevel@tonic-gate 1, ver)) == 0) 1837c478bd9Sstevel@tonic-gate return (0); 1847c478bd9Sstevel@tonic-gate 1857c478bd9Sstevel@tonic-gate j = _elf_msize(d->db_data.d_type, ver); 1867c478bd9Sstevel@tonic-gate fsz *= (d->db_data.d_size / j); 1877c478bd9Sstevel@tonic-gate d->db_osz = (size_t)fsz; 1887c478bd9Sstevel@tonic-gate if ((j = d->db_data.d_align) > 1) { 1897c478bd9Sstevel@tonic-gate if (j > sh->sh_addralign) 1907c478bd9Sstevel@tonic-gate sh->sh_addralign = (Xword)j; 1917c478bd9Sstevel@tonic-gate 1927c478bd9Sstevel@tonic-gate if (sz % j != 0) 1937c478bd9Sstevel@tonic-gate sz += j - sz % j; 1947c478bd9Sstevel@tonic-gate } 1957c478bd9Sstevel@tonic-gate d->db_data.d_off = (off_t)sz; 1967c478bd9Sstevel@tonic-gate d->db_xoff = sz; 1977c478bd9Sstevel@tonic-gate sz += (Xword)fsz; 1987c478bd9Sstevel@tonic-gate } 1997c478bd9Sstevel@tonic-gate 2007c478bd9Sstevel@tonic-gate sh->sh_size = sz; 2017c478bd9Sstevel@tonic-gate /* 2027c478bd9Sstevel@tonic-gate * We want to take into account the offsets for NOBITS 2037c478bd9Sstevel@tonic-gate * sections and let the "sh_offsets" point to where 2047c478bd9Sstevel@tonic-gate * the section would 'conceptually' fit within 2057c478bd9Sstevel@tonic-gate * the file (as required by the ABI). 2067c478bd9Sstevel@tonic-gate * 2077c478bd9Sstevel@tonic-gate * But - we must also make sure that the NOBITS does 2087c478bd9Sstevel@tonic-gate * not take up any actual space in the file. We preserve 2097c478bd9Sstevel@tonic-gate * the actual offset into the file in the 'hibit' variable. 2107c478bd9Sstevel@tonic-gate * When we come to the first non-NOBITS section after a 2117c478bd9Sstevel@tonic-gate * encountering a NOBITS section the hi counter is restored 2127c478bd9Sstevel@tonic-gate * to its proper place in the file. 2137c478bd9Sstevel@tonic-gate */ 2147c478bd9Sstevel@tonic-gate if (sh->sh_type == SHT_NOBITS) { 2157c478bd9Sstevel@tonic-gate if (hibit == 0) 2167c478bd9Sstevel@tonic-gate hibit = hi; 2177c478bd9Sstevel@tonic-gate } else { 2187c478bd9Sstevel@tonic-gate if (hibit) { 2197c478bd9Sstevel@tonic-gate hi = hibit; 2207c478bd9Sstevel@tonic-gate hibit = 0; 2217c478bd9Sstevel@tonic-gate } 2227c478bd9Sstevel@tonic-gate } 2237c478bd9Sstevel@tonic-gate j = sh->sh_addralign; 2247c478bd9Sstevel@tonic-gate if ((fsz = hi % j) != 0) 2257c478bd9Sstevel@tonic-gate hi += j - fsz; 2267c478bd9Sstevel@tonic-gate 2277c478bd9Sstevel@tonic-gate /* LINTED */ 2287c478bd9Sstevel@tonic-gate sh->sh_offset = (Off)hi; 2297c478bd9Sstevel@tonic-gate hi += sz; 2307c478bd9Sstevel@tonic-gate } 2317c478bd9Sstevel@tonic-gate 2327c478bd9Sstevel@tonic-gate /* 2337c478bd9Sstevel@tonic-gate * if last section was a 'NOBITS' section then we need to 2347c478bd9Sstevel@tonic-gate * restore the 'hi' counter to point to the end of the last 2357c478bd9Sstevel@tonic-gate * non 'NOBITS' section. 2367c478bd9Sstevel@tonic-gate */ 2377c478bd9Sstevel@tonic-gate if (hibit) { 2387c478bd9Sstevel@tonic-gate hi = hibit; 2397c478bd9Sstevel@tonic-gate hibit = 0; 2407c478bd9Sstevel@tonic-gate } 2417c478bd9Sstevel@tonic-gate 2427c478bd9Sstevel@tonic-gate /* 2437c478bd9Sstevel@tonic-gate * Shdr table last 2447c478bd9Sstevel@tonic-gate */ 2457c478bd9Sstevel@tonic-gate if (scncnt != 0) { 2467c478bd9Sstevel@tonic-gate if (hi % FSZ_LONG != 0) 2477c478bd9Sstevel@tonic-gate hi += FSZ_LONG - hi % FSZ_LONG; 2487c478bd9Sstevel@tonic-gate /* LINTED */ 2497c478bd9Sstevel@tonic-gate eh->e_shoff = (Off)hi; 2507c478bd9Sstevel@tonic-gate /* 2517c478bd9Sstevel@tonic-gate * If we are using 'extended sections' then the 2527c478bd9Sstevel@tonic-gate * e_shnum is stored in the sh_size field of the 2537c478bd9Sstevel@tonic-gate * first section header. 2547c478bd9Sstevel@tonic-gate * 2557c478bd9Sstevel@tonic-gate * NOTE: we set e_shnum to '0' because it's specified 2567c478bd9Sstevel@tonic-gate * this way in the gABI, and in the hopes that 2577c478bd9Sstevel@tonic-gate * this will cause less problems to unaware 2587c478bd9Sstevel@tonic-gate * tools then if we'd set it to SHN_XINDEX (0xffff). 2597c478bd9Sstevel@tonic-gate */ 2607c478bd9Sstevel@tonic-gate if (scncnt < SHN_LORESERVE) 2617c478bd9Sstevel@tonic-gate eh->e_shnum = scncnt; 2627c478bd9Sstevel@tonic-gate else { 2637c478bd9Sstevel@tonic-gate Shdr *sh; 2647c478bd9Sstevel@tonic-gate sh = (Shdr *)elf->ed_hdscn->s_shdr; 2657c478bd9Sstevel@tonic-gate sh->sh_size = scncnt; 2667c478bd9Sstevel@tonic-gate eh->e_shnum = 0; 2677c478bd9Sstevel@tonic-gate } 2687c478bd9Sstevel@tonic-gate /* LINTED */ 2697c478bd9Sstevel@tonic-gate eh->e_shentsize = (Half)elf_fsize(ELF_T_SHDR, 1, ver); 2707c478bd9Sstevel@tonic-gate hi += eh->e_shentsize * scncnt; 2717c478bd9Sstevel@tonic-gate } else { 2727c478bd9Sstevel@tonic-gate eh->e_shoff = 0; 2737c478bd9Sstevel@tonic-gate eh->e_shentsize = 0; 2747c478bd9Sstevel@tonic-gate } 2757c478bd9Sstevel@tonic-gate 2767c478bd9Sstevel@tonic-gate #if !(defined(_LP64) && defined(_ELF64)) 2777c478bd9Sstevel@tonic-gate if (hi > INT_MAX) { 2787c478bd9Sstevel@tonic-gate _elf_seterr(EFMT_FBIG, 0); 2797c478bd9Sstevel@tonic-gate return (0); 2807c478bd9Sstevel@tonic-gate } 2817c478bd9Sstevel@tonic-gate #endif 2827c478bd9Sstevel@tonic-gate 2837c478bd9Sstevel@tonic-gate return ((size_t)hi); 2847c478bd9Sstevel@tonic-gate } 2857c478bd9Sstevel@tonic-gate 2867c478bd9Sstevel@tonic-gate 2877c478bd9Sstevel@tonic-gate 2887c478bd9Sstevel@tonic-gate static size_t 2897c478bd9Sstevel@tonic-gate _elf_upd_usr(Elf * elf) 2907c478bd9Sstevel@tonic-gate { 2917c478bd9Sstevel@tonic-gate NOTE(ASSUMING_PROTECTED(*elf)) 2927c478bd9Sstevel@tonic-gate Lword hi; 2937c478bd9Sstevel@tonic-gate Elf_Scn * s; 2947c478bd9Sstevel@tonic-gate register Xword sz; 2957c478bd9Sstevel@tonic-gate Ehdr * eh = elf->ed_ehdr; 2967c478bd9Sstevel@tonic-gate unsigned ver = eh->e_version; 2977c478bd9Sstevel@tonic-gate register char *p = (char *)eh->e_ident; 2987c478bd9Sstevel@tonic-gate 2997c478bd9Sstevel@tonic-gate 3007c478bd9Sstevel@tonic-gate /* 3017c478bd9Sstevel@tonic-gate * Ehdr and Phdr table go first 3027c478bd9Sstevel@tonic-gate */ 3037c478bd9Sstevel@tonic-gate p[EI_MAG0] = ELFMAG0; 3047c478bd9Sstevel@tonic-gate p[EI_MAG1] = ELFMAG1; 3057c478bd9Sstevel@tonic-gate p[EI_MAG2] = ELFMAG2; 3067c478bd9Sstevel@tonic-gate p[EI_MAG3] = ELFMAG3; 3077c478bd9Sstevel@tonic-gate p[EI_CLASS] = ELFCLASS; 3087c478bd9Sstevel@tonic-gate /* LINTED */ 3097c478bd9Sstevel@tonic-gate p[EI_VERSION] = (Byte)ver; 3107c478bd9Sstevel@tonic-gate hi = elf_fsize(ELF_T_EHDR, 1, ver); 3117c478bd9Sstevel@tonic-gate /* LINTED */ 3127c478bd9Sstevel@tonic-gate eh->e_ehsize = (Half)hi; 3137c478bd9Sstevel@tonic-gate 3147c478bd9Sstevel@tonic-gate /* 3157c478bd9Sstevel@tonic-gate * If phnum is zero, phoff "should" be zero too, 3167c478bd9Sstevel@tonic-gate * but the application is responsible for it. 3177c478bd9Sstevel@tonic-gate * Allow a non-zero value here and update the 3187c478bd9Sstevel@tonic-gate * hi water mark accordingly. 3197c478bd9Sstevel@tonic-gate */ 3207c478bd9Sstevel@tonic-gate 3217c478bd9Sstevel@tonic-gate if (eh->e_phnum != 0) 3227c478bd9Sstevel@tonic-gate /* LINTED */ 3237c478bd9Sstevel@tonic-gate eh->e_phentsize = (Half)elf_fsize(ELF_T_PHDR, 1, ver); 3247c478bd9Sstevel@tonic-gate else 3257c478bd9Sstevel@tonic-gate eh->e_phentsize = 0; 3267c478bd9Sstevel@tonic-gate if ((sz = eh->e_phoff + eh->e_phentsize * eh->e_phnum) > hi) 3277c478bd9Sstevel@tonic-gate hi = sz; 3287c478bd9Sstevel@tonic-gate 3297c478bd9Sstevel@tonic-gate /* 3307c478bd9Sstevel@tonic-gate * Loop through sections, skipping index zero. 3317c478bd9Sstevel@tonic-gate * Compute section size before changing hi. 3327c478bd9Sstevel@tonic-gate * Allow null buffers for NOBITS. 3337c478bd9Sstevel@tonic-gate */ 3347c478bd9Sstevel@tonic-gate 3357c478bd9Sstevel@tonic-gate if ((s = elf->ed_hdscn) == 0) 3367c478bd9Sstevel@tonic-gate eh->e_shnum = 0; 3377c478bd9Sstevel@tonic-gate else { 3387c478bd9Sstevel@tonic-gate eh->e_shnum = 1; 3397c478bd9Sstevel@tonic-gate *(Shdr*)s->s_shdr = _elf_snode_init.sb_shdr; 3407c478bd9Sstevel@tonic-gate s = s->s_next; 3417c478bd9Sstevel@tonic-gate } 3427c478bd9Sstevel@tonic-gate for (; s != 0; s = s->s_next) { 3437c478bd9Sstevel@tonic-gate register Dnode *d; 3447c478bd9Sstevel@tonic-gate register Xword fsz, j; 3457c478bd9Sstevel@tonic-gate Shdr *sh = s->s_shdr; 3467c478bd9Sstevel@tonic-gate 3477c478bd9Sstevel@tonic-gate if ((s->s_myflags & SF_READY) == 0) 3487c478bd9Sstevel@tonic-gate (void) _elfxx_cookscn(s); 3497c478bd9Sstevel@tonic-gate 3507c478bd9Sstevel@tonic-gate ++eh->e_shnum; 3517c478bd9Sstevel@tonic-gate sz = 0; 3527c478bd9Sstevel@tonic-gate for (d = s->s_hdnode; d != 0; d = d->db_next) { 3537c478bd9Sstevel@tonic-gate if ((fsz = (Xword)elf_fsize(d->db_data.d_type, 1, 3547c478bd9Sstevel@tonic-gate ver)) == 0) 3557c478bd9Sstevel@tonic-gate return (0); 3567c478bd9Sstevel@tonic-gate j = (Xword)_elf_msize(d->db_data.d_type, ver); 3577c478bd9Sstevel@tonic-gate fsz *= (Xword)(d->db_data.d_size / j); 3587c478bd9Sstevel@tonic-gate d->db_osz = (size_t)fsz; 3597c478bd9Sstevel@tonic-gate 3607c478bd9Sstevel@tonic-gate if ((sh->sh_type != SHT_NOBITS) && 3617c478bd9Sstevel@tonic-gate ((j = (Xword)(d->db_data.d_off + d->db_osz)) > sz)) 3627c478bd9Sstevel@tonic-gate sz = j; 3637c478bd9Sstevel@tonic-gate } 3647c478bd9Sstevel@tonic-gate if (sh->sh_size < sz) { 3657c478bd9Sstevel@tonic-gate _elf_seterr(EFMT_SCNSZ, 0); 3667c478bd9Sstevel@tonic-gate return (0); 3677c478bd9Sstevel@tonic-gate } 3687c478bd9Sstevel@tonic-gate if ((sh->sh_type != SHT_NOBITS) && 3697c478bd9Sstevel@tonic-gate (hi < sh->sh_offset + sh->sh_size)) 3707c478bd9Sstevel@tonic-gate hi = sh->sh_offset + sh->sh_size; 3717c478bd9Sstevel@tonic-gate } 3727c478bd9Sstevel@tonic-gate 3737c478bd9Sstevel@tonic-gate /* 3747c478bd9Sstevel@tonic-gate * Shdr table last. Comment above for phnum/phoff applies here. 3757c478bd9Sstevel@tonic-gate */ 3767c478bd9Sstevel@tonic-gate if (eh->e_shnum != 0) 3777c478bd9Sstevel@tonic-gate /* LINTED */ 3787c478bd9Sstevel@tonic-gate eh->e_shentsize = (Half)elf_fsize(ELF_T_SHDR, 1, ver); 3797c478bd9Sstevel@tonic-gate else 3807c478bd9Sstevel@tonic-gate eh->e_shentsize = 0; 3817c478bd9Sstevel@tonic-gate 3827c478bd9Sstevel@tonic-gate if ((sz = eh->e_shoff + eh->e_shentsize * eh->e_shnum) > hi) 3837c478bd9Sstevel@tonic-gate hi = sz; 3847c478bd9Sstevel@tonic-gate 3857c478bd9Sstevel@tonic-gate #if !(defined(_LP64) && defined(_ELF64)) 3867c478bd9Sstevel@tonic-gate if (hi > INT_MAX) { 3877c478bd9Sstevel@tonic-gate _elf_seterr(EFMT_FBIG, 0); 3887c478bd9Sstevel@tonic-gate return (0); 3897c478bd9Sstevel@tonic-gate } 3907c478bd9Sstevel@tonic-gate #endif 3917c478bd9Sstevel@tonic-gate 3927c478bd9Sstevel@tonic-gate return ((size_t)hi); 3937c478bd9Sstevel@tonic-gate } 3947c478bd9Sstevel@tonic-gate 3957c478bd9Sstevel@tonic-gate 3967c478bd9Sstevel@tonic-gate static size_t 3977c478bd9Sstevel@tonic-gate wrt(Elf * elf, Xword outsz, unsigned fill, int update_cmd) 3987c478bd9Sstevel@tonic-gate { 3997c478bd9Sstevel@tonic-gate NOTE(ASSUMING_PROTECTED(*elf)) 4007c478bd9Sstevel@tonic-gate Elf_Data dst, src; 4017c478bd9Sstevel@tonic-gate unsigned flag; 4027c478bd9Sstevel@tonic-gate Xword hi, sz; 4037c478bd9Sstevel@tonic-gate char *image; 4047c478bd9Sstevel@tonic-gate Elf_Scn *s; 4057c478bd9Sstevel@tonic-gate Ehdr *eh = elf->ed_ehdr; 4067c478bd9Sstevel@tonic-gate unsigned ver = eh->e_version; 4077c478bd9Sstevel@tonic-gate unsigned encode = eh->e_ident[EI_DATA]; 4087c478bd9Sstevel@tonic-gate int byte; 4097c478bd9Sstevel@tonic-gate 4107c478bd9Sstevel@tonic-gate /* 4117c478bd9Sstevel@tonic-gate * Two issues can cause trouble for the output file. 4127c478bd9Sstevel@tonic-gate * First, begin() with ELF_C_RDWR opens a file for both 4137c478bd9Sstevel@tonic-gate * read and write. On the write update(), the library 4147c478bd9Sstevel@tonic-gate * has to read everything it needs before truncating 4157c478bd9Sstevel@tonic-gate * the file. Second, using mmap for both read and write 4167c478bd9Sstevel@tonic-gate * is too tricky. Consequently, the library disables mmap 4177c478bd9Sstevel@tonic-gate * on the read side. Using mmap for the output saves swap 4187c478bd9Sstevel@tonic-gate * space, because that mapping is SHARED, not PRIVATE. 4197c478bd9Sstevel@tonic-gate * 4207c478bd9Sstevel@tonic-gate * If the file is write-only, there can be nothing of 4217c478bd9Sstevel@tonic-gate * interest to bother with. 4227c478bd9Sstevel@tonic-gate * 4237c478bd9Sstevel@tonic-gate * The following reads the entire file, which might be 4247c478bd9Sstevel@tonic-gate * more than necessary. Better safe than sorry. 4257c478bd9Sstevel@tonic-gate */ 4267c478bd9Sstevel@tonic-gate 4277c478bd9Sstevel@tonic-gate if ((elf->ed_myflags & EDF_READ) && 4287c478bd9Sstevel@tonic-gate (_elf_vm(elf, (size_t)0, elf->ed_fsz) != OK_YES)) 4297c478bd9Sstevel@tonic-gate return (0); 4307c478bd9Sstevel@tonic-gate 4317c478bd9Sstevel@tonic-gate flag = elf->ed_myflags & EDF_WRALLOC; 4327c478bd9Sstevel@tonic-gate if ((image = _elf_outmap(elf->ed_fd, outsz, &flag)) == 0) 4337c478bd9Sstevel@tonic-gate return (0); 4347c478bd9Sstevel@tonic-gate 4357c478bd9Sstevel@tonic-gate if (flag == 0) 4367c478bd9Sstevel@tonic-gate elf->ed_myflags |= EDF_IMALLOC; 4377c478bd9Sstevel@tonic-gate 4387c478bd9Sstevel@tonic-gate /* 4397c478bd9Sstevel@tonic-gate * If an error occurs below, a "dirty" bit may be cleared 4407c478bd9Sstevel@tonic-gate * improperly. To save a second pass through the file, 4417c478bd9Sstevel@tonic-gate * this code sets the dirty bit on the elf descriptor 4427c478bd9Sstevel@tonic-gate * when an error happens, assuming that will "cover" any 4437c478bd9Sstevel@tonic-gate * accidents. 4447c478bd9Sstevel@tonic-gate */ 4457c478bd9Sstevel@tonic-gate 4467c478bd9Sstevel@tonic-gate /* 4477c478bd9Sstevel@tonic-gate * Hi is needed only when 'fill' is non-zero. 4487c478bd9Sstevel@tonic-gate * Fill is non-zero only when the library 4497c478bd9Sstevel@tonic-gate * calculates file/section/data buffer offsets. 4507c478bd9Sstevel@tonic-gate * The lib guarantees they increase monotonically. 4517c478bd9Sstevel@tonic-gate * That guarantees proper filling below. 4527c478bd9Sstevel@tonic-gate */ 4537c478bd9Sstevel@tonic-gate 4547c478bd9Sstevel@tonic-gate 4557c478bd9Sstevel@tonic-gate /* 4567c478bd9Sstevel@tonic-gate * Ehdr first 4577c478bd9Sstevel@tonic-gate */ 4587c478bd9Sstevel@tonic-gate 4597c478bd9Sstevel@tonic-gate src.d_buf = (Elf_Void *)eh; 4607c478bd9Sstevel@tonic-gate src.d_type = ELF_T_EHDR; 4617c478bd9Sstevel@tonic-gate src.d_size = sizeof (Ehdr); 4627c478bd9Sstevel@tonic-gate src.d_version = EV_CURRENT; 4637c478bd9Sstevel@tonic-gate dst.d_buf = (Elf_Void *)image; 4647c478bd9Sstevel@tonic-gate dst.d_size = eh->e_ehsize; 4657c478bd9Sstevel@tonic-gate dst.d_version = ver; 4667c478bd9Sstevel@tonic-gate if (elf_xlatetof(&dst, &src, encode) == 0) 4677c478bd9Sstevel@tonic-gate return (0); 4687c478bd9Sstevel@tonic-gate elf->ed_ehflags &= ~ELF_F_DIRTY; 4697c478bd9Sstevel@tonic-gate hi = eh->e_ehsize; 4707c478bd9Sstevel@tonic-gate 4717c478bd9Sstevel@tonic-gate /* 4727c478bd9Sstevel@tonic-gate * Phdr table if one exists 4737c478bd9Sstevel@tonic-gate */ 4747c478bd9Sstevel@tonic-gate 4757c478bd9Sstevel@tonic-gate if (eh->e_phnum != 0) { 4767c478bd9Sstevel@tonic-gate unsigned work; 4777c478bd9Sstevel@tonic-gate /* 4787c478bd9Sstevel@tonic-gate * Unlike other library data, phdr table is 4797c478bd9Sstevel@tonic-gate * in the user version. Change src buffer 4807c478bd9Sstevel@tonic-gate * version here, fix it after translation. 4817c478bd9Sstevel@tonic-gate */ 4827c478bd9Sstevel@tonic-gate 4837c478bd9Sstevel@tonic-gate src.d_buf = (Elf_Void *)elf->ed_phdr; 4847c478bd9Sstevel@tonic-gate src.d_type = ELF_T_PHDR; 4857c478bd9Sstevel@tonic-gate src.d_size = elf->ed_phdrsz; 4867c478bd9Sstevel@tonic-gate ELFACCESSDATA(work, _elf_work) 4877c478bd9Sstevel@tonic-gate src.d_version = work; 4887c478bd9Sstevel@tonic-gate dst.d_buf = (Elf_Void *)(image + eh->e_phoff); 4897c478bd9Sstevel@tonic-gate dst.d_size = eh->e_phnum * eh->e_phentsize; 4907c478bd9Sstevel@tonic-gate hi = (Xword)(eh->e_phoff + dst.d_size); 4917c478bd9Sstevel@tonic-gate if (elf_xlatetof(&dst, &src, encode) == 0) { 4927c478bd9Sstevel@tonic-gate elf->ed_uflags |= ELF_F_DIRTY; 4937c478bd9Sstevel@tonic-gate return (0); 4947c478bd9Sstevel@tonic-gate } 4957c478bd9Sstevel@tonic-gate elf->ed_phflags &= ~ELF_F_DIRTY; 4967c478bd9Sstevel@tonic-gate src.d_version = EV_CURRENT; 4977c478bd9Sstevel@tonic-gate } 4987c478bd9Sstevel@tonic-gate 4997c478bd9Sstevel@tonic-gate /* 5007c478bd9Sstevel@tonic-gate * Loop through sections 5017c478bd9Sstevel@tonic-gate */ 5027c478bd9Sstevel@tonic-gate 5037c478bd9Sstevel@tonic-gate ELFACCESSDATA(byte, _elf_byte); 5047c478bd9Sstevel@tonic-gate for (s = elf->ed_hdscn; s != 0; s = s->s_next) { 5057c478bd9Sstevel@tonic-gate register Dnode *d, *prevd; 5067c478bd9Sstevel@tonic-gate Xword off = 0; 5077c478bd9Sstevel@tonic-gate Shdr *sh = s->s_shdr; 5087c478bd9Sstevel@tonic-gate char *start = image + sh->sh_offset; 5097c478bd9Sstevel@tonic-gate char *here; 5107c478bd9Sstevel@tonic-gate 5117c478bd9Sstevel@tonic-gate /* 5127c478bd9Sstevel@tonic-gate * Just "clean" DIRTY flag for "empty" sections. Even if 5137c478bd9Sstevel@tonic-gate * NOBITS needs padding, the next thing in the 5147c478bd9Sstevel@tonic-gate * file will provide it. (And if this NOBITS is 5157c478bd9Sstevel@tonic-gate * the last thing in the file, no padding needed.) 5167c478bd9Sstevel@tonic-gate */ 5177c478bd9Sstevel@tonic-gate if ((sh->sh_type == SHT_NOBITS) || 5187c478bd9Sstevel@tonic-gate (sh->sh_type == SHT_NULL)) { 5197c478bd9Sstevel@tonic-gate d = s->s_hdnode, prevd = 0; 5207c478bd9Sstevel@tonic-gate for (; d != 0; prevd = d, d = d->db_next) 5217c478bd9Sstevel@tonic-gate d->db_uflags &= ~ELF_F_DIRTY; 5227c478bd9Sstevel@tonic-gate continue; 5237c478bd9Sstevel@tonic-gate } 5247c478bd9Sstevel@tonic-gate /* 5257c478bd9Sstevel@tonic-gate * Clear out the memory between the end of the last 5267c478bd9Sstevel@tonic-gate * section and the begining of this section. 5277c478bd9Sstevel@tonic-gate */ 5287c478bd9Sstevel@tonic-gate if (fill && (sh->sh_offset > hi)) { 5297c478bd9Sstevel@tonic-gate sz = sh->sh_offset - hi; 5307c478bd9Sstevel@tonic-gate (void) memset(start - sz, byte, sz); 5317c478bd9Sstevel@tonic-gate } 5327c478bd9Sstevel@tonic-gate 5337c478bd9Sstevel@tonic-gate 5347c478bd9Sstevel@tonic-gate for (d = s->s_hdnode, prevd = 0; 5357c478bd9Sstevel@tonic-gate d != 0; prevd = d, d = d->db_next) { 5367c478bd9Sstevel@tonic-gate d->db_uflags &= ~ELF_F_DIRTY; 5377c478bd9Sstevel@tonic-gate here = start + d->db_data.d_off; 5387c478bd9Sstevel@tonic-gate 5397c478bd9Sstevel@tonic-gate /* 5407c478bd9Sstevel@tonic-gate * Clear out the memory between the end of the 5417c478bd9Sstevel@tonic-gate * last update and the start of this data buffer. 5427c478bd9Sstevel@tonic-gate */ 5437c478bd9Sstevel@tonic-gate if (fill && (d->db_data.d_off > off)) { 5447c478bd9Sstevel@tonic-gate sz = (Xword)(d->db_data.d_off - off); 5457c478bd9Sstevel@tonic-gate (void) memset(here - sz, byte, sz); 5467c478bd9Sstevel@tonic-gate } 5477c478bd9Sstevel@tonic-gate 5487c478bd9Sstevel@tonic-gate if ((d->db_myflags & DBF_READY) == 0) { 5497c478bd9Sstevel@tonic-gate SCNLOCK(s); 5507c478bd9Sstevel@tonic-gate if (_elf_locked_getdata(s, &prevd->db_data) != 5517c478bd9Sstevel@tonic-gate &d->db_data) { 5527c478bd9Sstevel@tonic-gate elf->ed_uflags |= ELF_F_DIRTY; 5537c478bd9Sstevel@tonic-gate SCNUNLOCK(s); 5547c478bd9Sstevel@tonic-gate return (0); 5557c478bd9Sstevel@tonic-gate } 5567c478bd9Sstevel@tonic-gate SCNUNLOCK(s); 5577c478bd9Sstevel@tonic-gate } 5587c478bd9Sstevel@tonic-gate dst.d_buf = (Elf_Void *)here; 5597c478bd9Sstevel@tonic-gate dst.d_size = d->db_osz; 5607c478bd9Sstevel@tonic-gate 5617c478bd9Sstevel@tonic-gate /* 5627c478bd9Sstevel@tonic-gate * Copy the translated bits out to the destination 5637c478bd9Sstevel@tonic-gate * image. 5647c478bd9Sstevel@tonic-gate */ 5657c478bd9Sstevel@tonic-gate if (elf_xlatetof(&dst, &d->db_data, encode) == 0) { 5667c478bd9Sstevel@tonic-gate elf->ed_uflags |= ELF_F_DIRTY; 5677c478bd9Sstevel@tonic-gate return (0); 5687c478bd9Sstevel@tonic-gate } 5697c478bd9Sstevel@tonic-gate 5707c478bd9Sstevel@tonic-gate off = (Xword)(d->db_data.d_off + dst.d_size); 5717c478bd9Sstevel@tonic-gate } 5727c478bd9Sstevel@tonic-gate hi = sh->sh_offset + sh->sh_size; 5737c478bd9Sstevel@tonic-gate } 5747c478bd9Sstevel@tonic-gate 5757c478bd9Sstevel@tonic-gate /* 5767c478bd9Sstevel@tonic-gate * Shdr table last 5777c478bd9Sstevel@tonic-gate */ 5787c478bd9Sstevel@tonic-gate 5797c478bd9Sstevel@tonic-gate if (fill && (eh->e_shoff > hi)) { 5807c478bd9Sstevel@tonic-gate sz = eh->e_shoff - hi; 5817c478bd9Sstevel@tonic-gate (void) memset(image + hi, byte, sz); 5827c478bd9Sstevel@tonic-gate } 5837c478bd9Sstevel@tonic-gate 5847c478bd9Sstevel@tonic-gate src.d_type = ELF_T_SHDR; 5857c478bd9Sstevel@tonic-gate src.d_size = sizeof (Shdr); 5867c478bd9Sstevel@tonic-gate dst.d_buf = (Elf_Void *)(image + eh->e_shoff); 5877c478bd9Sstevel@tonic-gate dst.d_size = eh->e_shentsize; 5887c478bd9Sstevel@tonic-gate for (s = elf->ed_hdscn; s != 0; s = s->s_next) { 5897c478bd9Sstevel@tonic-gate assert((uintptr_t)dst.d_buf < ((uintptr_t)image + outsz)); 5907c478bd9Sstevel@tonic-gate s->s_shflags &= ~ELF_F_DIRTY; 5917c478bd9Sstevel@tonic-gate s->s_uflags &= ~ELF_F_DIRTY; 5927c478bd9Sstevel@tonic-gate src.d_buf = s->s_shdr; 5937c478bd9Sstevel@tonic-gate 5947c478bd9Sstevel@tonic-gate if (elf_xlatetof(&dst, &src, encode) == 0) { 5957c478bd9Sstevel@tonic-gate elf->ed_uflags |= ELF_F_DIRTY; 5967c478bd9Sstevel@tonic-gate return (0); 5977c478bd9Sstevel@tonic-gate } 5987c478bd9Sstevel@tonic-gate 5997c478bd9Sstevel@tonic-gate dst.d_buf = (char *)dst.d_buf + eh->e_shentsize; 6007c478bd9Sstevel@tonic-gate } 6017c478bd9Sstevel@tonic-gate /* 6027c478bd9Sstevel@tonic-gate * ELF_C_WRIMAGE signifyes that we build the memory image, but 6037c478bd9Sstevel@tonic-gate * that we do not actually write it to disk. This is used 6047c478bd9Sstevel@tonic-gate * by ld(1) to build up a full image of an elf file and then 6057c478bd9Sstevel@tonic-gate * to process the file before it's actually written out to 6067c478bd9Sstevel@tonic-gate * disk. This saves ld(1) the overhead of having to write 6077c478bd9Sstevel@tonic-gate * the image out to disk twice. 6087c478bd9Sstevel@tonic-gate */ 6097c478bd9Sstevel@tonic-gate if (update_cmd == ELF_C_WRIMAGE) { 6107c478bd9Sstevel@tonic-gate elf->ed_uflags &= ~ELF_F_DIRTY; 6117c478bd9Sstevel@tonic-gate elf->ed_wrimage = image; 6127c478bd9Sstevel@tonic-gate elf->ed_wrimagesz = outsz; 6137c478bd9Sstevel@tonic-gate return (outsz); 6147c478bd9Sstevel@tonic-gate } 6157c478bd9Sstevel@tonic-gate 6167c478bd9Sstevel@tonic-gate if (_elf_outsync(elf->ed_fd, image, outsz, 6177c478bd9Sstevel@tonic-gate ((elf->ed_myflags & EDF_IMALLOC) ? 0 : 1)) != 0) { 6187c478bd9Sstevel@tonic-gate elf->ed_uflags &= ~ELF_F_DIRTY; 6197c478bd9Sstevel@tonic-gate elf->ed_myflags &= ~EDF_IMALLOC; 6207c478bd9Sstevel@tonic-gate return (outsz); 6217c478bd9Sstevel@tonic-gate } 6227c478bd9Sstevel@tonic-gate 6237c478bd9Sstevel@tonic-gate elf->ed_uflags |= ELF_F_DIRTY; 6247c478bd9Sstevel@tonic-gate return (0); 6257c478bd9Sstevel@tonic-gate } 6267c478bd9Sstevel@tonic-gate 6277c478bd9Sstevel@tonic-gate 6287c478bd9Sstevel@tonic-gate 6297c478bd9Sstevel@tonic-gate 6307c478bd9Sstevel@tonic-gate /* 6317c478bd9Sstevel@tonic-gate * The following is a private interface between the linkers (ld & ld.so.1) 6327c478bd9Sstevel@tonic-gate * and libelf: 6337c478bd9Sstevel@tonic-gate * 6347c478bd9Sstevel@tonic-gate * elf_update(elf, ELF_C_WRIMAGE) 6357c478bd9Sstevel@tonic-gate * This will cause full image representing the elf file 6367c478bd9Sstevel@tonic-gate * described by the elf pointer to be built in memory. If the 6377c478bd9Sstevel@tonic-gate * elf pointer has a valid file descriptor associated with it 6387c478bd9Sstevel@tonic-gate * we will attempt to build the memory image from mmap()'ed 6397c478bd9Sstevel@tonic-gate * storage. If the elf descriptor does not have a valid 6407c478bd9Sstevel@tonic-gate * file descriptor (opened with elf_begin(0, ELF_C_IMAGE, 0)) 6417c478bd9Sstevel@tonic-gate * then the image will be allocated from dynamic memory (malloc()). 6427c478bd9Sstevel@tonic-gate * 6437c478bd9Sstevel@tonic-gate * elf_update() will return the size of the memory image built 6447c478bd9Sstevel@tonic-gate * when sucessful. 6457c478bd9Sstevel@tonic-gate * 6467c478bd9Sstevel@tonic-gate * When a subsequent call to elf_update() with ELF_C_WRITE as 6477c478bd9Sstevel@tonic-gate * the command is performed it will sync the image created 6487c478bd9Sstevel@tonic-gate * by ELF_C_WRIMAGE to disk (if fd available) and 6497c478bd9Sstevel@tonic-gate * free the memory allocated. 6507c478bd9Sstevel@tonic-gate */ 6517c478bd9Sstevel@tonic-gate 6527c478bd9Sstevel@tonic-gate off_t 6537c478bd9Sstevel@tonic-gate _elfxx_update(Elf * elf, Elf_Cmd cmd) 6547c478bd9Sstevel@tonic-gate { 6557c478bd9Sstevel@tonic-gate size_t sz; 6567c478bd9Sstevel@tonic-gate unsigned u; 6577c478bd9Sstevel@tonic-gate Ehdr *eh = elf->ed_ehdr; 6587c478bd9Sstevel@tonic-gate 6597c478bd9Sstevel@tonic-gate if (elf == 0) 6607c478bd9Sstevel@tonic-gate return (-1); 6617c478bd9Sstevel@tonic-gate 6627c478bd9Sstevel@tonic-gate ELFWLOCK(elf) 6637c478bd9Sstevel@tonic-gate switch (cmd) { 6647c478bd9Sstevel@tonic-gate default: 6657c478bd9Sstevel@tonic-gate _elf_seterr(EREQ_UPDATE, 0); 6667c478bd9Sstevel@tonic-gate ELFUNLOCK(elf) 6677c478bd9Sstevel@tonic-gate return (-1); 6687c478bd9Sstevel@tonic-gate 6697c478bd9Sstevel@tonic-gate case ELF_C_WRIMAGE: 6707c478bd9Sstevel@tonic-gate if ((elf->ed_myflags & EDF_WRITE) == 0) { 6717c478bd9Sstevel@tonic-gate _elf_seterr(EREQ_UPDWRT, 0); 6727c478bd9Sstevel@tonic-gate ELFUNLOCK(elf) 6737c478bd9Sstevel@tonic-gate return (-1); 6747c478bd9Sstevel@tonic-gate } 6757c478bd9Sstevel@tonic-gate break; 6767c478bd9Sstevel@tonic-gate case ELF_C_WRITE: 6777c478bd9Sstevel@tonic-gate if ((elf->ed_myflags & EDF_WRITE) == 0) { 6787c478bd9Sstevel@tonic-gate _elf_seterr(EREQ_UPDWRT, 0); 6797c478bd9Sstevel@tonic-gate ELFUNLOCK(elf) 6807c478bd9Sstevel@tonic-gate return (-1); 6817c478bd9Sstevel@tonic-gate } 6827c478bd9Sstevel@tonic-gate if (elf->ed_wrimage) { 6837c478bd9Sstevel@tonic-gate if (elf->ed_myflags & EDF_WRALLOC) { 6847c478bd9Sstevel@tonic-gate free(elf->ed_wrimage); 6857c478bd9Sstevel@tonic-gate /* 6867c478bd9Sstevel@tonic-gate * The size is still returned even 6877c478bd9Sstevel@tonic-gate * though nothing is actually written 6887c478bd9Sstevel@tonic-gate * out. This is just to be consistant 6897c478bd9Sstevel@tonic-gate * with the rest of the interface. 6907c478bd9Sstevel@tonic-gate */ 6917c478bd9Sstevel@tonic-gate sz = elf->ed_wrimagesz; 6927c478bd9Sstevel@tonic-gate elf->ed_wrimage = 0; 6937c478bd9Sstevel@tonic-gate elf->ed_wrimagesz = 0; 6947c478bd9Sstevel@tonic-gate ELFUNLOCK(elf); 6957c478bd9Sstevel@tonic-gate return ((off_t)sz); 6967c478bd9Sstevel@tonic-gate } 6977c478bd9Sstevel@tonic-gate sz = _elf_outsync(elf->ed_fd, elf->ed_wrimage, 6987c478bd9Sstevel@tonic-gate elf->ed_wrimagesz, 6997c478bd9Sstevel@tonic-gate (elf->ed_myflags & EDF_IMALLOC ? 0 : 1)); 7007c478bd9Sstevel@tonic-gate elf->ed_myflags &= ~EDF_IMALLOC; 7017c478bd9Sstevel@tonic-gate elf->ed_wrimage = 0; 7027c478bd9Sstevel@tonic-gate elf->ed_wrimagesz = 0; 7037c478bd9Sstevel@tonic-gate ELFUNLOCK(elf); 7047c478bd9Sstevel@tonic-gate return ((off_t)sz); 7057c478bd9Sstevel@tonic-gate } 7067c478bd9Sstevel@tonic-gate /* FALLTHROUGH */ 7077c478bd9Sstevel@tonic-gate case ELF_C_NULL: 7087c478bd9Sstevel@tonic-gate break; 7097c478bd9Sstevel@tonic-gate } 7107c478bd9Sstevel@tonic-gate 7117c478bd9Sstevel@tonic-gate if (eh == 0) { 7127c478bd9Sstevel@tonic-gate _elf_seterr(ESEQ_EHDR, 0); 7137c478bd9Sstevel@tonic-gate ELFUNLOCK(elf) 7147c478bd9Sstevel@tonic-gate return (-1); 7157c478bd9Sstevel@tonic-gate } 7167c478bd9Sstevel@tonic-gate 7177c478bd9Sstevel@tonic-gate if ((u = eh->e_version) > EV_CURRENT) { 7187c478bd9Sstevel@tonic-gate _elf_seterr(EREQ_VER, 0); 7197c478bd9Sstevel@tonic-gate ELFUNLOCK(elf) 7207c478bd9Sstevel@tonic-gate return (-1); 7217c478bd9Sstevel@tonic-gate } 7227c478bd9Sstevel@tonic-gate 7237c478bd9Sstevel@tonic-gate if (u == EV_NONE) 7247c478bd9Sstevel@tonic-gate eh->e_version = EV_CURRENT; 7257c478bd9Sstevel@tonic-gate 7267c478bd9Sstevel@tonic-gate if ((u = eh->e_ident[EI_DATA]) == ELFDATANONE) { 7277c478bd9Sstevel@tonic-gate unsigned encode; 7287c478bd9Sstevel@tonic-gate 7297c478bd9Sstevel@tonic-gate ELFACCESSDATA(encode, _elf_encode) 7307c478bd9Sstevel@tonic-gate if (encode == ELFDATANONE) { 7317c478bd9Sstevel@tonic-gate _elf_seterr(EREQ_ENCODE, 0); 7327c478bd9Sstevel@tonic-gate ELFUNLOCK(elf) 7337c478bd9Sstevel@tonic-gate return (-1); 7347c478bd9Sstevel@tonic-gate } 7357c478bd9Sstevel@tonic-gate /* LINTED */ 7367c478bd9Sstevel@tonic-gate eh->e_ident[EI_DATA] = (Byte)encode; 7377c478bd9Sstevel@tonic-gate } 7387c478bd9Sstevel@tonic-gate 7397c478bd9Sstevel@tonic-gate u = 1; 7407c478bd9Sstevel@tonic-gate if (elf->ed_uflags & ELF_F_LAYOUT) { 7417c478bd9Sstevel@tonic-gate sz = _elf_upd_usr(elf); 7427c478bd9Sstevel@tonic-gate u = 0; 7437c478bd9Sstevel@tonic-gate } else 7447c478bd9Sstevel@tonic-gate sz = _elf_upd_lib(elf); 7457c478bd9Sstevel@tonic-gate 7467c478bd9Sstevel@tonic-gate if ((sz != 0) && ((cmd == ELF_C_WRITE) || (cmd == ELF_C_WRIMAGE))) 7477c478bd9Sstevel@tonic-gate sz = wrt(elf, (Xword)sz, u, cmd); 7487c478bd9Sstevel@tonic-gate 7497c478bd9Sstevel@tonic-gate if (sz == 0) { 7507c478bd9Sstevel@tonic-gate ELFUNLOCK(elf) 7517c478bd9Sstevel@tonic-gate return (-1); 7527c478bd9Sstevel@tonic-gate } 7537c478bd9Sstevel@tonic-gate 7547c478bd9Sstevel@tonic-gate ELFUNLOCK(elf) 7557c478bd9Sstevel@tonic-gate return ((off_t)sz); 7567c478bd9Sstevel@tonic-gate } 7577c478bd9Sstevel@tonic-gate 7587c478bd9Sstevel@tonic-gate 7597c478bd9Sstevel@tonic-gate #ifndef _ELF64 7607c478bd9Sstevel@tonic-gate /* class-independent, only needs to be compiled once */ 7617c478bd9Sstevel@tonic-gate 7627c478bd9Sstevel@tonic-gate off_t 7637c478bd9Sstevel@tonic-gate elf_update(Elf *elf, Elf_Cmd cmd) 7647c478bd9Sstevel@tonic-gate { 7657c478bd9Sstevel@tonic-gate if (elf == 0) 7667c478bd9Sstevel@tonic-gate return (-1); 7677c478bd9Sstevel@tonic-gate 7687c478bd9Sstevel@tonic-gate if (elf->ed_class == ELFCLASS32) 7697c478bd9Sstevel@tonic-gate return (_elf32_update(elf, cmd)); 7707c478bd9Sstevel@tonic-gate else if (elf->ed_class == ELFCLASS64) { 7717c478bd9Sstevel@tonic-gate return (_elf64_update(elf, cmd)); 7727c478bd9Sstevel@tonic-gate } 7737c478bd9Sstevel@tonic-gate 7747c478bd9Sstevel@tonic-gate _elf_seterr(EREQ_CLASS, 0); 7757c478bd9Sstevel@tonic-gate return (-1); 7767c478bd9Sstevel@tonic-gate } 7777c478bd9Sstevel@tonic-gate 7787c478bd9Sstevel@tonic-gate /* 7797c478bd9Sstevel@tonic-gate * 4106312, 4106398, This is an ad-hoc means for the 32-bit 7807c478bd9Sstevel@tonic-gate * Elf64 version of libld.so.3 to get around the limitation 7817c478bd9Sstevel@tonic-gate * of a 32-bit d_off field. This is only intended to be 7827c478bd9Sstevel@tonic-gate * used by libld to relocate symbols in large NOBITS sections. 7837c478bd9Sstevel@tonic-gate */ 7847c478bd9Sstevel@tonic-gate Elf64_Off 7857c478bd9Sstevel@tonic-gate _elf_getxoff(Elf_Data * d) 7867c478bd9Sstevel@tonic-gate { 7877c478bd9Sstevel@tonic-gate return (((Dnode *)d)->db_xoff); 7887c478bd9Sstevel@tonic-gate } 7897c478bd9Sstevel@tonic-gate #endif /* !_ELF64 */ 790