1*7c478bd9Sstevel@tonic-gate /* 2*7c478bd9Sstevel@tonic-gate * CDDL HEADER START 3*7c478bd9Sstevel@tonic-gate * 4*7c478bd9Sstevel@tonic-gate * The contents of this file are subject to the terms of the 5*7c478bd9Sstevel@tonic-gate * Common Development and Distribution License, Version 1.0 only 6*7c478bd9Sstevel@tonic-gate * (the "License"). You may not use this file except in compliance 7*7c478bd9Sstevel@tonic-gate * with the License. 8*7c478bd9Sstevel@tonic-gate * 9*7c478bd9Sstevel@tonic-gate * You can obtain a copy of the license at usr/src/OPENSOLARIS.LICENSE 10*7c478bd9Sstevel@tonic-gate * or http://www.opensolaris.org/os/licensing. 11*7c478bd9Sstevel@tonic-gate * See the License for the specific language governing permissions 12*7c478bd9Sstevel@tonic-gate * and limitations under the License. 13*7c478bd9Sstevel@tonic-gate * 14*7c478bd9Sstevel@tonic-gate * When distributing Covered Code, include this CDDL HEADER in each 15*7c478bd9Sstevel@tonic-gate * file and include the License file at usr/src/OPENSOLARIS.LICENSE. 16*7c478bd9Sstevel@tonic-gate * If applicable, add the following below this CDDL HEADER, with the 17*7c478bd9Sstevel@tonic-gate * fields enclosed by brackets "[]" replaced with your own identifying 18*7c478bd9Sstevel@tonic-gate * information: Portions Copyright [yyyy] [name of copyright owner] 19*7c478bd9Sstevel@tonic-gate * 20*7c478bd9Sstevel@tonic-gate * CDDL HEADER END 21*7c478bd9Sstevel@tonic-gate */ 22*7c478bd9Sstevel@tonic-gate /* Copyright (c) 1988 AT&T */ 23*7c478bd9Sstevel@tonic-gate /* All Rights Reserved */ 24*7c478bd9Sstevel@tonic-gate 25*7c478bd9Sstevel@tonic-gate 26*7c478bd9Sstevel@tonic-gate /* 27*7c478bd9Sstevel@tonic-gate * Copyright 2004 Sun Microsystems, Inc. All rights reserved. 28*7c478bd9Sstevel@tonic-gate * Use is subject to license terms. 29*7c478bd9Sstevel@tonic-gate */ 30*7c478bd9Sstevel@tonic-gate 31*7c478bd9Sstevel@tonic-gate #pragma ident "%Z%%M% %I% %E% SMI" 32*7c478bd9Sstevel@tonic-gate 33*7c478bd9Sstevel@tonic-gate #if !defined(_ELF64) 34*7c478bd9Sstevel@tonic-gate #pragma weak elf_update = _elf_update 35*7c478bd9Sstevel@tonic-gate #endif 36*7c478bd9Sstevel@tonic-gate 37*7c478bd9Sstevel@tonic-gate #include "syn.h" 38*7c478bd9Sstevel@tonic-gate #include <memory.h> 39*7c478bd9Sstevel@tonic-gate #include <malloc.h> 40*7c478bd9Sstevel@tonic-gate #include <limits.h> 41*7c478bd9Sstevel@tonic-gate 42*7c478bd9Sstevel@tonic-gate #include <sgs.h> 43*7c478bd9Sstevel@tonic-gate #include "decl.h" 44*7c478bd9Sstevel@tonic-gate #include "msg.h" 45*7c478bd9Sstevel@tonic-gate 46*7c478bd9Sstevel@tonic-gate /* 47*7c478bd9Sstevel@tonic-gate * This module is compiled twice, the second time having 48*7c478bd9Sstevel@tonic-gate * -D_ELF64 defined. The following set of macros, along 49*7c478bd9Sstevel@tonic-gate * with machelf.h, represent the differences between the 50*7c478bd9Sstevel@tonic-gate * two compilations. Be careful *not* to add any class- 51*7c478bd9Sstevel@tonic-gate * dependent code (anything that has elf32 or elf64 in the 52*7c478bd9Sstevel@tonic-gate * name) to this code without hiding it behind a switch- 53*7c478bd9Sstevel@tonic-gate * able macro like these. 54*7c478bd9Sstevel@tonic-gate */ 55*7c478bd9Sstevel@tonic-gate #if defined(_ELF64) 56*7c478bd9Sstevel@tonic-gate 57*7c478bd9Sstevel@tonic-gate #define FSZ_LONG ELF64_FSZ_XWORD 58*7c478bd9Sstevel@tonic-gate #define ELFCLASS ELFCLASS64 59*7c478bd9Sstevel@tonic-gate #define _elf_snode_init _elf64_snode_init 60*7c478bd9Sstevel@tonic-gate #define _elfxx_cookscn _elf64_cookscn 61*7c478bd9Sstevel@tonic-gate #define _elf_upd_lib _elf64_upd_lib 62*7c478bd9Sstevel@tonic-gate #define elf_fsize elf64_fsize 63*7c478bd9Sstevel@tonic-gate #define _elf_entsz _elf64_entsz 64*7c478bd9Sstevel@tonic-gate #define _elf_msize _elf64_msize 65*7c478bd9Sstevel@tonic-gate #define _elf_upd_usr _elf64_upd_usr 66*7c478bd9Sstevel@tonic-gate #define wrt wrt64 67*7c478bd9Sstevel@tonic-gate #define elf_xlatetof elf64_xlatetof 68*7c478bd9Sstevel@tonic-gate #define _elfxx_update _elf64_update 69*7c478bd9Sstevel@tonic-gate 70*7c478bd9Sstevel@tonic-gate #else /* ELF32 */ 71*7c478bd9Sstevel@tonic-gate 72*7c478bd9Sstevel@tonic-gate #define FSZ_LONG ELF32_FSZ_WORD 73*7c478bd9Sstevel@tonic-gate #define ELFCLASS ELFCLASS32 74*7c478bd9Sstevel@tonic-gate #define _elf_snode_init _elf32_snode_init 75*7c478bd9Sstevel@tonic-gate #define _elfxx_cookscn _elf32_cookscn 76*7c478bd9Sstevel@tonic-gate #define _elf_upd_lib _elf32_upd_lib 77*7c478bd9Sstevel@tonic-gate #define elf_fsize elf32_fsize 78*7c478bd9Sstevel@tonic-gate #define _elf_entsz _elf32_entsz 79*7c478bd9Sstevel@tonic-gate #define _elf_msize _elf32_msize 80*7c478bd9Sstevel@tonic-gate #define _elf_upd_usr _elf32_upd_usr 81*7c478bd9Sstevel@tonic-gate #define wrt wrt32 82*7c478bd9Sstevel@tonic-gate #define elf_xlatetof elf32_xlatetof 83*7c478bd9Sstevel@tonic-gate #define _elfxx_update _elf32_update 84*7c478bd9Sstevel@tonic-gate 85*7c478bd9Sstevel@tonic-gate #endif /* ELF64 */ 86*7c478bd9Sstevel@tonic-gate 87*7c478bd9Sstevel@tonic-gate 88*7c478bd9Sstevel@tonic-gate /* 89*7c478bd9Sstevel@tonic-gate * Output file update 90*7c478bd9Sstevel@tonic-gate * These functions walk an Elf structure, update its information, 91*7c478bd9Sstevel@tonic-gate * and optionally write the output file. Because the application 92*7c478bd9Sstevel@tonic-gate * may control of the output file layout, two upd_... routines 93*7c478bd9Sstevel@tonic-gate * exist. They're similar but too different to merge cleanly. 94*7c478bd9Sstevel@tonic-gate * 95*7c478bd9Sstevel@tonic-gate * The library defines a "dirty" bit to force parts of the file 96*7c478bd9Sstevel@tonic-gate * to be written on update. These routines ignore the dirty bit 97*7c478bd9Sstevel@tonic-gate * and do everything. A minimal update routine might be useful 98*7c478bd9Sstevel@tonic-gate * someday. 99*7c478bd9Sstevel@tonic-gate */ 100*7c478bd9Sstevel@tonic-gate 101*7c478bd9Sstevel@tonic-gate 102*7c478bd9Sstevel@tonic-gate static size_t 103*7c478bd9Sstevel@tonic-gate _elf_upd_lib(Elf * elf) 104*7c478bd9Sstevel@tonic-gate { 105*7c478bd9Sstevel@tonic-gate NOTE(ASSUMING_PROTECTED(*elf)) 106*7c478bd9Sstevel@tonic-gate Lword hi; 107*7c478bd9Sstevel@tonic-gate Lword hibit; 108*7c478bd9Sstevel@tonic-gate Elf_Scn * s; 109*7c478bd9Sstevel@tonic-gate register Xword sz; 110*7c478bd9Sstevel@tonic-gate Ehdr * eh = elf->ed_ehdr; 111*7c478bd9Sstevel@tonic-gate unsigned ver = eh->e_version; 112*7c478bd9Sstevel@tonic-gate register char *p = (char *)eh->e_ident; 113*7c478bd9Sstevel@tonic-gate size_t scncnt; 114*7c478bd9Sstevel@tonic-gate 115*7c478bd9Sstevel@tonic-gate 116*7c478bd9Sstevel@tonic-gate /* 117*7c478bd9Sstevel@tonic-gate * Ehdr and Phdr table go first 118*7c478bd9Sstevel@tonic-gate */ 119*7c478bd9Sstevel@tonic-gate p[EI_MAG0] = ELFMAG0; 120*7c478bd9Sstevel@tonic-gate p[EI_MAG1] = ELFMAG1; 121*7c478bd9Sstevel@tonic-gate p[EI_MAG2] = ELFMAG2; 122*7c478bd9Sstevel@tonic-gate p[EI_MAG3] = ELFMAG3; 123*7c478bd9Sstevel@tonic-gate p[EI_CLASS] = ELFCLASS; 124*7c478bd9Sstevel@tonic-gate /* LINTED */ 125*7c478bd9Sstevel@tonic-gate p[EI_VERSION] = (Byte)ver; 126*7c478bd9Sstevel@tonic-gate hi = elf_fsize(ELF_T_EHDR, 1, ver); 127*7c478bd9Sstevel@tonic-gate /* LINTED */ 128*7c478bd9Sstevel@tonic-gate eh->e_ehsize = (Half)hi; 129*7c478bd9Sstevel@tonic-gate if (eh->e_phnum != 0) { 130*7c478bd9Sstevel@tonic-gate /* LINTED */ 131*7c478bd9Sstevel@tonic-gate eh->e_phentsize = (Half)elf_fsize(ELF_T_PHDR, 1, ver); 132*7c478bd9Sstevel@tonic-gate /* LINTED */ 133*7c478bd9Sstevel@tonic-gate eh->e_phoff = (Off)hi; 134*7c478bd9Sstevel@tonic-gate hi += eh->e_phentsize * eh->e_phnum; 135*7c478bd9Sstevel@tonic-gate } else { 136*7c478bd9Sstevel@tonic-gate eh->e_phoff = 0; 137*7c478bd9Sstevel@tonic-gate eh->e_phentsize = 0; 138*7c478bd9Sstevel@tonic-gate } 139*7c478bd9Sstevel@tonic-gate 140*7c478bd9Sstevel@tonic-gate 141*7c478bd9Sstevel@tonic-gate /* 142*7c478bd9Sstevel@tonic-gate * Loop through sections, skipping index zero. 143*7c478bd9Sstevel@tonic-gate * Compute section size before changing hi. 144*7c478bd9Sstevel@tonic-gate * Allow null buffers for NOBITS. 145*7c478bd9Sstevel@tonic-gate */ 146*7c478bd9Sstevel@tonic-gate 147*7c478bd9Sstevel@tonic-gate if ((s = elf->ed_hdscn) == 0) { 148*7c478bd9Sstevel@tonic-gate eh->e_shnum = 0; 149*7c478bd9Sstevel@tonic-gate scncnt = 0; 150*7c478bd9Sstevel@tonic-gate } else { 151*7c478bd9Sstevel@tonic-gate scncnt = 1; 152*7c478bd9Sstevel@tonic-gate *(Shdr *)s->s_shdr = _elf_snode_init.sb_shdr; 153*7c478bd9Sstevel@tonic-gate s = s->s_next; 154*7c478bd9Sstevel@tonic-gate } 155*7c478bd9Sstevel@tonic-gate 156*7c478bd9Sstevel@tonic-gate hibit = 0; 157*7c478bd9Sstevel@tonic-gate for (; s != 0; s = s->s_next) { 158*7c478bd9Sstevel@tonic-gate register Dnode *d; 159*7c478bd9Sstevel@tonic-gate register Lword fsz, j; 160*7c478bd9Sstevel@tonic-gate Shdr *sh = s->s_shdr; 161*7c478bd9Sstevel@tonic-gate 162*7c478bd9Sstevel@tonic-gate scncnt++; 163*7c478bd9Sstevel@tonic-gate if (sh->sh_type == SHT_NULL) { 164*7c478bd9Sstevel@tonic-gate *sh = _elf_snode_init.sb_shdr; 165*7c478bd9Sstevel@tonic-gate continue; 166*7c478bd9Sstevel@tonic-gate } 167*7c478bd9Sstevel@tonic-gate 168*7c478bd9Sstevel@tonic-gate if ((s->s_myflags & SF_READY) == 0) 169*7c478bd9Sstevel@tonic-gate (void) _elfxx_cookscn(s); 170*7c478bd9Sstevel@tonic-gate 171*7c478bd9Sstevel@tonic-gate sh->sh_addralign = 1; 172*7c478bd9Sstevel@tonic-gate if ((sz = (Xword)_elf_entsz(sh->sh_type, ver)) != 0) 173*7c478bd9Sstevel@tonic-gate /* LINTED */ 174*7c478bd9Sstevel@tonic-gate sh->sh_entsize = (Half)sz; 175*7c478bd9Sstevel@tonic-gate sz = 0; 176*7c478bd9Sstevel@tonic-gate for (d = s->s_hdnode; d != 0; d = d->db_next) { 177*7c478bd9Sstevel@tonic-gate if ((fsz = elf_fsize(d->db_data.d_type, 178*7c478bd9Sstevel@tonic-gate 1, ver)) == 0) 179*7c478bd9Sstevel@tonic-gate return (0); 180*7c478bd9Sstevel@tonic-gate 181*7c478bd9Sstevel@tonic-gate j = _elf_msize(d->db_data.d_type, ver); 182*7c478bd9Sstevel@tonic-gate fsz *= (d->db_data.d_size / j); 183*7c478bd9Sstevel@tonic-gate d->db_osz = (size_t)fsz; 184*7c478bd9Sstevel@tonic-gate if ((j = d->db_data.d_align) > 1) { 185*7c478bd9Sstevel@tonic-gate if (j > sh->sh_addralign) 186*7c478bd9Sstevel@tonic-gate sh->sh_addralign = (Xword)j; 187*7c478bd9Sstevel@tonic-gate 188*7c478bd9Sstevel@tonic-gate if (sz % j != 0) 189*7c478bd9Sstevel@tonic-gate sz += j - sz % j; 190*7c478bd9Sstevel@tonic-gate } 191*7c478bd9Sstevel@tonic-gate d->db_data.d_off = (off_t)sz; 192*7c478bd9Sstevel@tonic-gate d->db_xoff = sz; 193*7c478bd9Sstevel@tonic-gate sz += (Xword)fsz; 194*7c478bd9Sstevel@tonic-gate } 195*7c478bd9Sstevel@tonic-gate 196*7c478bd9Sstevel@tonic-gate sh->sh_size = sz; 197*7c478bd9Sstevel@tonic-gate /* 198*7c478bd9Sstevel@tonic-gate * We want to take into account the offsets for NOBITS 199*7c478bd9Sstevel@tonic-gate * sections and let the "sh_offsets" point to where 200*7c478bd9Sstevel@tonic-gate * the section would 'conceptually' fit within 201*7c478bd9Sstevel@tonic-gate * the file (as required by the ABI). 202*7c478bd9Sstevel@tonic-gate * 203*7c478bd9Sstevel@tonic-gate * But - we must also make sure that the NOBITS does 204*7c478bd9Sstevel@tonic-gate * not take up any actual space in the file. We preserve 205*7c478bd9Sstevel@tonic-gate * the actual offset into the file in the 'hibit' variable. 206*7c478bd9Sstevel@tonic-gate * When we come to the first non-NOBITS section after a 207*7c478bd9Sstevel@tonic-gate * encountering a NOBITS section the hi counter is restored 208*7c478bd9Sstevel@tonic-gate * to its proper place in the file. 209*7c478bd9Sstevel@tonic-gate */ 210*7c478bd9Sstevel@tonic-gate if (sh->sh_type == SHT_NOBITS) { 211*7c478bd9Sstevel@tonic-gate if (hibit == 0) 212*7c478bd9Sstevel@tonic-gate hibit = hi; 213*7c478bd9Sstevel@tonic-gate } else { 214*7c478bd9Sstevel@tonic-gate if (hibit) { 215*7c478bd9Sstevel@tonic-gate hi = hibit; 216*7c478bd9Sstevel@tonic-gate hibit = 0; 217*7c478bd9Sstevel@tonic-gate } 218*7c478bd9Sstevel@tonic-gate } 219*7c478bd9Sstevel@tonic-gate j = sh->sh_addralign; 220*7c478bd9Sstevel@tonic-gate if ((fsz = hi % j) != 0) 221*7c478bd9Sstevel@tonic-gate hi += j - fsz; 222*7c478bd9Sstevel@tonic-gate 223*7c478bd9Sstevel@tonic-gate /* LINTED */ 224*7c478bd9Sstevel@tonic-gate sh->sh_offset = (Off)hi; 225*7c478bd9Sstevel@tonic-gate hi += sz; 226*7c478bd9Sstevel@tonic-gate } 227*7c478bd9Sstevel@tonic-gate 228*7c478bd9Sstevel@tonic-gate /* 229*7c478bd9Sstevel@tonic-gate * if last section was a 'NOBITS' section then we need to 230*7c478bd9Sstevel@tonic-gate * restore the 'hi' counter to point to the end of the last 231*7c478bd9Sstevel@tonic-gate * non 'NOBITS' section. 232*7c478bd9Sstevel@tonic-gate */ 233*7c478bd9Sstevel@tonic-gate if (hibit) { 234*7c478bd9Sstevel@tonic-gate hi = hibit; 235*7c478bd9Sstevel@tonic-gate hibit = 0; 236*7c478bd9Sstevel@tonic-gate } 237*7c478bd9Sstevel@tonic-gate 238*7c478bd9Sstevel@tonic-gate /* 239*7c478bd9Sstevel@tonic-gate * Shdr table last 240*7c478bd9Sstevel@tonic-gate */ 241*7c478bd9Sstevel@tonic-gate if (scncnt != 0) { 242*7c478bd9Sstevel@tonic-gate if (hi % FSZ_LONG != 0) 243*7c478bd9Sstevel@tonic-gate hi += FSZ_LONG - hi % FSZ_LONG; 244*7c478bd9Sstevel@tonic-gate /* LINTED */ 245*7c478bd9Sstevel@tonic-gate eh->e_shoff = (Off)hi; 246*7c478bd9Sstevel@tonic-gate /* 247*7c478bd9Sstevel@tonic-gate * If we are using 'extended sections' then the 248*7c478bd9Sstevel@tonic-gate * e_shnum is stored in the sh_size field of the 249*7c478bd9Sstevel@tonic-gate * first section header. 250*7c478bd9Sstevel@tonic-gate * 251*7c478bd9Sstevel@tonic-gate * NOTE: we set e_shnum to '0' because it's specified 252*7c478bd9Sstevel@tonic-gate * this way in the gABI, and in the hopes that 253*7c478bd9Sstevel@tonic-gate * this will cause less problems to unaware 254*7c478bd9Sstevel@tonic-gate * tools then if we'd set it to SHN_XINDEX (0xffff). 255*7c478bd9Sstevel@tonic-gate */ 256*7c478bd9Sstevel@tonic-gate if (scncnt < SHN_LORESERVE) 257*7c478bd9Sstevel@tonic-gate eh->e_shnum = scncnt; 258*7c478bd9Sstevel@tonic-gate else { 259*7c478bd9Sstevel@tonic-gate Shdr *sh; 260*7c478bd9Sstevel@tonic-gate sh = (Shdr *)elf->ed_hdscn->s_shdr; 261*7c478bd9Sstevel@tonic-gate sh->sh_size = scncnt; 262*7c478bd9Sstevel@tonic-gate eh->e_shnum = 0; 263*7c478bd9Sstevel@tonic-gate } 264*7c478bd9Sstevel@tonic-gate /* LINTED */ 265*7c478bd9Sstevel@tonic-gate eh->e_shentsize = (Half)elf_fsize(ELF_T_SHDR, 1, ver); 266*7c478bd9Sstevel@tonic-gate hi += eh->e_shentsize * scncnt; 267*7c478bd9Sstevel@tonic-gate } else { 268*7c478bd9Sstevel@tonic-gate eh->e_shoff = 0; 269*7c478bd9Sstevel@tonic-gate eh->e_shentsize = 0; 270*7c478bd9Sstevel@tonic-gate } 271*7c478bd9Sstevel@tonic-gate 272*7c478bd9Sstevel@tonic-gate #if !(defined(_LP64) && defined(_ELF64)) 273*7c478bd9Sstevel@tonic-gate if (hi > INT_MAX) { 274*7c478bd9Sstevel@tonic-gate _elf_seterr(EFMT_FBIG, 0); 275*7c478bd9Sstevel@tonic-gate return (0); 276*7c478bd9Sstevel@tonic-gate } 277*7c478bd9Sstevel@tonic-gate #endif 278*7c478bd9Sstevel@tonic-gate 279*7c478bd9Sstevel@tonic-gate return ((size_t)hi); 280*7c478bd9Sstevel@tonic-gate } 281*7c478bd9Sstevel@tonic-gate 282*7c478bd9Sstevel@tonic-gate 283*7c478bd9Sstevel@tonic-gate 284*7c478bd9Sstevel@tonic-gate static size_t 285*7c478bd9Sstevel@tonic-gate _elf_upd_usr(Elf * elf) 286*7c478bd9Sstevel@tonic-gate { 287*7c478bd9Sstevel@tonic-gate NOTE(ASSUMING_PROTECTED(*elf)) 288*7c478bd9Sstevel@tonic-gate Lword hi; 289*7c478bd9Sstevel@tonic-gate Elf_Scn * s; 290*7c478bd9Sstevel@tonic-gate register Xword sz; 291*7c478bd9Sstevel@tonic-gate Ehdr * eh = elf->ed_ehdr; 292*7c478bd9Sstevel@tonic-gate unsigned ver = eh->e_version; 293*7c478bd9Sstevel@tonic-gate register char *p = (char *)eh->e_ident; 294*7c478bd9Sstevel@tonic-gate 295*7c478bd9Sstevel@tonic-gate 296*7c478bd9Sstevel@tonic-gate /* 297*7c478bd9Sstevel@tonic-gate * Ehdr and Phdr table go first 298*7c478bd9Sstevel@tonic-gate */ 299*7c478bd9Sstevel@tonic-gate p[EI_MAG0] = ELFMAG0; 300*7c478bd9Sstevel@tonic-gate p[EI_MAG1] = ELFMAG1; 301*7c478bd9Sstevel@tonic-gate p[EI_MAG2] = ELFMAG2; 302*7c478bd9Sstevel@tonic-gate p[EI_MAG3] = ELFMAG3; 303*7c478bd9Sstevel@tonic-gate p[EI_CLASS] = ELFCLASS; 304*7c478bd9Sstevel@tonic-gate /* LINTED */ 305*7c478bd9Sstevel@tonic-gate p[EI_VERSION] = (Byte)ver; 306*7c478bd9Sstevel@tonic-gate hi = elf_fsize(ELF_T_EHDR, 1, ver); 307*7c478bd9Sstevel@tonic-gate /* LINTED */ 308*7c478bd9Sstevel@tonic-gate eh->e_ehsize = (Half)hi; 309*7c478bd9Sstevel@tonic-gate 310*7c478bd9Sstevel@tonic-gate /* 311*7c478bd9Sstevel@tonic-gate * If phnum is zero, phoff "should" be zero too, 312*7c478bd9Sstevel@tonic-gate * but the application is responsible for it. 313*7c478bd9Sstevel@tonic-gate * Allow a non-zero value here and update the 314*7c478bd9Sstevel@tonic-gate * hi water mark accordingly. 315*7c478bd9Sstevel@tonic-gate */ 316*7c478bd9Sstevel@tonic-gate 317*7c478bd9Sstevel@tonic-gate if (eh->e_phnum != 0) 318*7c478bd9Sstevel@tonic-gate /* LINTED */ 319*7c478bd9Sstevel@tonic-gate eh->e_phentsize = (Half)elf_fsize(ELF_T_PHDR, 1, ver); 320*7c478bd9Sstevel@tonic-gate else 321*7c478bd9Sstevel@tonic-gate eh->e_phentsize = 0; 322*7c478bd9Sstevel@tonic-gate if ((sz = eh->e_phoff + eh->e_phentsize * eh->e_phnum) > hi) 323*7c478bd9Sstevel@tonic-gate hi = sz; 324*7c478bd9Sstevel@tonic-gate 325*7c478bd9Sstevel@tonic-gate /* 326*7c478bd9Sstevel@tonic-gate * Loop through sections, skipping index zero. 327*7c478bd9Sstevel@tonic-gate * Compute section size before changing hi. 328*7c478bd9Sstevel@tonic-gate * Allow null buffers for NOBITS. 329*7c478bd9Sstevel@tonic-gate */ 330*7c478bd9Sstevel@tonic-gate 331*7c478bd9Sstevel@tonic-gate if ((s = elf->ed_hdscn) == 0) 332*7c478bd9Sstevel@tonic-gate eh->e_shnum = 0; 333*7c478bd9Sstevel@tonic-gate else { 334*7c478bd9Sstevel@tonic-gate eh->e_shnum = 1; 335*7c478bd9Sstevel@tonic-gate *(Shdr*)s->s_shdr = _elf_snode_init.sb_shdr; 336*7c478bd9Sstevel@tonic-gate s = s->s_next; 337*7c478bd9Sstevel@tonic-gate } 338*7c478bd9Sstevel@tonic-gate for (; s != 0; s = s->s_next) { 339*7c478bd9Sstevel@tonic-gate register Dnode *d; 340*7c478bd9Sstevel@tonic-gate register Xword fsz, j; 341*7c478bd9Sstevel@tonic-gate Shdr *sh = s->s_shdr; 342*7c478bd9Sstevel@tonic-gate 343*7c478bd9Sstevel@tonic-gate if ((s->s_myflags & SF_READY) == 0) 344*7c478bd9Sstevel@tonic-gate (void) _elfxx_cookscn(s); 345*7c478bd9Sstevel@tonic-gate 346*7c478bd9Sstevel@tonic-gate ++eh->e_shnum; 347*7c478bd9Sstevel@tonic-gate sz = 0; 348*7c478bd9Sstevel@tonic-gate for (d = s->s_hdnode; d != 0; d = d->db_next) { 349*7c478bd9Sstevel@tonic-gate if ((fsz = (Xword)elf_fsize(d->db_data.d_type, 1, 350*7c478bd9Sstevel@tonic-gate ver)) == 0) 351*7c478bd9Sstevel@tonic-gate return (0); 352*7c478bd9Sstevel@tonic-gate j = (Xword)_elf_msize(d->db_data.d_type, ver); 353*7c478bd9Sstevel@tonic-gate fsz *= (Xword)(d->db_data.d_size / j); 354*7c478bd9Sstevel@tonic-gate d->db_osz = (size_t)fsz; 355*7c478bd9Sstevel@tonic-gate 356*7c478bd9Sstevel@tonic-gate if ((sh->sh_type != SHT_NOBITS) && 357*7c478bd9Sstevel@tonic-gate ((j = (Xword)(d->db_data.d_off + d->db_osz)) > sz)) 358*7c478bd9Sstevel@tonic-gate sz = j; 359*7c478bd9Sstevel@tonic-gate } 360*7c478bd9Sstevel@tonic-gate if (sh->sh_size < sz) { 361*7c478bd9Sstevel@tonic-gate _elf_seterr(EFMT_SCNSZ, 0); 362*7c478bd9Sstevel@tonic-gate return (0); 363*7c478bd9Sstevel@tonic-gate } 364*7c478bd9Sstevel@tonic-gate if ((sh->sh_type != SHT_NOBITS) && 365*7c478bd9Sstevel@tonic-gate (hi < sh->sh_offset + sh->sh_size)) 366*7c478bd9Sstevel@tonic-gate hi = sh->sh_offset + sh->sh_size; 367*7c478bd9Sstevel@tonic-gate } 368*7c478bd9Sstevel@tonic-gate 369*7c478bd9Sstevel@tonic-gate /* 370*7c478bd9Sstevel@tonic-gate * Shdr table last. Comment above for phnum/phoff applies here. 371*7c478bd9Sstevel@tonic-gate */ 372*7c478bd9Sstevel@tonic-gate if (eh->e_shnum != 0) 373*7c478bd9Sstevel@tonic-gate /* LINTED */ 374*7c478bd9Sstevel@tonic-gate eh->e_shentsize = (Half)elf_fsize(ELF_T_SHDR, 1, ver); 375*7c478bd9Sstevel@tonic-gate else 376*7c478bd9Sstevel@tonic-gate eh->e_shentsize = 0; 377*7c478bd9Sstevel@tonic-gate 378*7c478bd9Sstevel@tonic-gate if ((sz = eh->e_shoff + eh->e_shentsize * eh->e_shnum) > hi) 379*7c478bd9Sstevel@tonic-gate hi = sz; 380*7c478bd9Sstevel@tonic-gate 381*7c478bd9Sstevel@tonic-gate #if !(defined(_LP64) && defined(_ELF64)) 382*7c478bd9Sstevel@tonic-gate if (hi > INT_MAX) { 383*7c478bd9Sstevel@tonic-gate _elf_seterr(EFMT_FBIG, 0); 384*7c478bd9Sstevel@tonic-gate return (0); 385*7c478bd9Sstevel@tonic-gate } 386*7c478bd9Sstevel@tonic-gate #endif 387*7c478bd9Sstevel@tonic-gate 388*7c478bd9Sstevel@tonic-gate return ((size_t)hi); 389*7c478bd9Sstevel@tonic-gate } 390*7c478bd9Sstevel@tonic-gate 391*7c478bd9Sstevel@tonic-gate 392*7c478bd9Sstevel@tonic-gate static size_t 393*7c478bd9Sstevel@tonic-gate wrt(Elf * elf, Xword outsz, unsigned fill, int update_cmd) 394*7c478bd9Sstevel@tonic-gate { 395*7c478bd9Sstevel@tonic-gate NOTE(ASSUMING_PROTECTED(*elf)) 396*7c478bd9Sstevel@tonic-gate Elf_Data dst, src; 397*7c478bd9Sstevel@tonic-gate unsigned flag; 398*7c478bd9Sstevel@tonic-gate Xword hi, sz; 399*7c478bd9Sstevel@tonic-gate char *image; 400*7c478bd9Sstevel@tonic-gate Elf_Scn *s; 401*7c478bd9Sstevel@tonic-gate Ehdr *eh = elf->ed_ehdr; 402*7c478bd9Sstevel@tonic-gate unsigned ver = eh->e_version; 403*7c478bd9Sstevel@tonic-gate unsigned encode = eh->e_ident[EI_DATA]; 404*7c478bd9Sstevel@tonic-gate int byte; 405*7c478bd9Sstevel@tonic-gate 406*7c478bd9Sstevel@tonic-gate /* 407*7c478bd9Sstevel@tonic-gate * Two issues can cause trouble for the output file. 408*7c478bd9Sstevel@tonic-gate * First, begin() with ELF_C_RDWR opens a file for both 409*7c478bd9Sstevel@tonic-gate * read and write. On the write update(), the library 410*7c478bd9Sstevel@tonic-gate * has to read everything it needs before truncating 411*7c478bd9Sstevel@tonic-gate * the file. Second, using mmap for both read and write 412*7c478bd9Sstevel@tonic-gate * is too tricky. Consequently, the library disables mmap 413*7c478bd9Sstevel@tonic-gate * on the read side. Using mmap for the output saves swap 414*7c478bd9Sstevel@tonic-gate * space, because that mapping is SHARED, not PRIVATE. 415*7c478bd9Sstevel@tonic-gate * 416*7c478bd9Sstevel@tonic-gate * If the file is write-only, there can be nothing of 417*7c478bd9Sstevel@tonic-gate * interest to bother with. 418*7c478bd9Sstevel@tonic-gate * 419*7c478bd9Sstevel@tonic-gate * The following reads the entire file, which might be 420*7c478bd9Sstevel@tonic-gate * more than necessary. Better safe than sorry. 421*7c478bd9Sstevel@tonic-gate */ 422*7c478bd9Sstevel@tonic-gate 423*7c478bd9Sstevel@tonic-gate if ((elf->ed_myflags & EDF_READ) && 424*7c478bd9Sstevel@tonic-gate (_elf_vm(elf, (size_t)0, elf->ed_fsz) != OK_YES)) 425*7c478bd9Sstevel@tonic-gate return (0); 426*7c478bd9Sstevel@tonic-gate 427*7c478bd9Sstevel@tonic-gate flag = elf->ed_myflags & EDF_WRALLOC; 428*7c478bd9Sstevel@tonic-gate if ((image = _elf_outmap(elf->ed_fd, outsz, &flag)) == 0) 429*7c478bd9Sstevel@tonic-gate return (0); 430*7c478bd9Sstevel@tonic-gate 431*7c478bd9Sstevel@tonic-gate if (flag == 0) 432*7c478bd9Sstevel@tonic-gate elf->ed_myflags |= EDF_IMALLOC; 433*7c478bd9Sstevel@tonic-gate 434*7c478bd9Sstevel@tonic-gate /* 435*7c478bd9Sstevel@tonic-gate * If an error occurs below, a "dirty" bit may be cleared 436*7c478bd9Sstevel@tonic-gate * improperly. To save a second pass through the file, 437*7c478bd9Sstevel@tonic-gate * this code sets the dirty bit on the elf descriptor 438*7c478bd9Sstevel@tonic-gate * when an error happens, assuming that will "cover" any 439*7c478bd9Sstevel@tonic-gate * accidents. 440*7c478bd9Sstevel@tonic-gate */ 441*7c478bd9Sstevel@tonic-gate 442*7c478bd9Sstevel@tonic-gate /* 443*7c478bd9Sstevel@tonic-gate * Hi is needed only when 'fill' is non-zero. 444*7c478bd9Sstevel@tonic-gate * Fill is non-zero only when the library 445*7c478bd9Sstevel@tonic-gate * calculates file/section/data buffer offsets. 446*7c478bd9Sstevel@tonic-gate * The lib guarantees they increase monotonically. 447*7c478bd9Sstevel@tonic-gate * That guarantees proper filling below. 448*7c478bd9Sstevel@tonic-gate */ 449*7c478bd9Sstevel@tonic-gate 450*7c478bd9Sstevel@tonic-gate 451*7c478bd9Sstevel@tonic-gate /* 452*7c478bd9Sstevel@tonic-gate * Ehdr first 453*7c478bd9Sstevel@tonic-gate */ 454*7c478bd9Sstevel@tonic-gate 455*7c478bd9Sstevel@tonic-gate src.d_buf = (Elf_Void *)eh; 456*7c478bd9Sstevel@tonic-gate src.d_type = ELF_T_EHDR; 457*7c478bd9Sstevel@tonic-gate src.d_size = sizeof (Ehdr); 458*7c478bd9Sstevel@tonic-gate src.d_version = EV_CURRENT; 459*7c478bd9Sstevel@tonic-gate dst.d_buf = (Elf_Void *)image; 460*7c478bd9Sstevel@tonic-gate dst.d_size = eh->e_ehsize; 461*7c478bd9Sstevel@tonic-gate dst.d_version = ver; 462*7c478bd9Sstevel@tonic-gate if (elf_xlatetof(&dst, &src, encode) == 0) 463*7c478bd9Sstevel@tonic-gate return (0); 464*7c478bd9Sstevel@tonic-gate elf->ed_ehflags &= ~ELF_F_DIRTY; 465*7c478bd9Sstevel@tonic-gate hi = eh->e_ehsize; 466*7c478bd9Sstevel@tonic-gate 467*7c478bd9Sstevel@tonic-gate /* 468*7c478bd9Sstevel@tonic-gate * Phdr table if one exists 469*7c478bd9Sstevel@tonic-gate */ 470*7c478bd9Sstevel@tonic-gate 471*7c478bd9Sstevel@tonic-gate if (eh->e_phnum != 0) { 472*7c478bd9Sstevel@tonic-gate unsigned work; 473*7c478bd9Sstevel@tonic-gate /* 474*7c478bd9Sstevel@tonic-gate * Unlike other library data, phdr table is 475*7c478bd9Sstevel@tonic-gate * in the user version. Change src buffer 476*7c478bd9Sstevel@tonic-gate * version here, fix it after translation. 477*7c478bd9Sstevel@tonic-gate */ 478*7c478bd9Sstevel@tonic-gate 479*7c478bd9Sstevel@tonic-gate src.d_buf = (Elf_Void *)elf->ed_phdr; 480*7c478bd9Sstevel@tonic-gate src.d_type = ELF_T_PHDR; 481*7c478bd9Sstevel@tonic-gate src.d_size = elf->ed_phdrsz; 482*7c478bd9Sstevel@tonic-gate ELFACCESSDATA(work, _elf_work) 483*7c478bd9Sstevel@tonic-gate src.d_version = work; 484*7c478bd9Sstevel@tonic-gate dst.d_buf = (Elf_Void *)(image + eh->e_phoff); 485*7c478bd9Sstevel@tonic-gate dst.d_size = eh->e_phnum * eh->e_phentsize; 486*7c478bd9Sstevel@tonic-gate hi = (Xword)(eh->e_phoff + dst.d_size); 487*7c478bd9Sstevel@tonic-gate if (elf_xlatetof(&dst, &src, encode) == 0) { 488*7c478bd9Sstevel@tonic-gate elf->ed_uflags |= ELF_F_DIRTY; 489*7c478bd9Sstevel@tonic-gate return (0); 490*7c478bd9Sstevel@tonic-gate } 491*7c478bd9Sstevel@tonic-gate elf->ed_phflags &= ~ELF_F_DIRTY; 492*7c478bd9Sstevel@tonic-gate src.d_version = EV_CURRENT; 493*7c478bd9Sstevel@tonic-gate } 494*7c478bd9Sstevel@tonic-gate 495*7c478bd9Sstevel@tonic-gate /* 496*7c478bd9Sstevel@tonic-gate * Loop through sections 497*7c478bd9Sstevel@tonic-gate */ 498*7c478bd9Sstevel@tonic-gate 499*7c478bd9Sstevel@tonic-gate ELFACCESSDATA(byte, _elf_byte); 500*7c478bd9Sstevel@tonic-gate for (s = elf->ed_hdscn; s != 0; s = s->s_next) { 501*7c478bd9Sstevel@tonic-gate register Dnode *d, *prevd; 502*7c478bd9Sstevel@tonic-gate Xword off = 0; 503*7c478bd9Sstevel@tonic-gate Shdr *sh = s->s_shdr; 504*7c478bd9Sstevel@tonic-gate char *start = image + sh->sh_offset; 505*7c478bd9Sstevel@tonic-gate char *here; 506*7c478bd9Sstevel@tonic-gate 507*7c478bd9Sstevel@tonic-gate /* 508*7c478bd9Sstevel@tonic-gate * Just "clean" DIRTY flag for "empty" sections. Even if 509*7c478bd9Sstevel@tonic-gate * NOBITS needs padding, the next thing in the 510*7c478bd9Sstevel@tonic-gate * file will provide it. (And if this NOBITS is 511*7c478bd9Sstevel@tonic-gate * the last thing in the file, no padding needed.) 512*7c478bd9Sstevel@tonic-gate */ 513*7c478bd9Sstevel@tonic-gate if ((sh->sh_type == SHT_NOBITS) || 514*7c478bd9Sstevel@tonic-gate (sh->sh_type == SHT_NULL)) { 515*7c478bd9Sstevel@tonic-gate d = s->s_hdnode, prevd = 0; 516*7c478bd9Sstevel@tonic-gate for (; d != 0; prevd = d, d = d->db_next) 517*7c478bd9Sstevel@tonic-gate d->db_uflags &= ~ELF_F_DIRTY; 518*7c478bd9Sstevel@tonic-gate continue; 519*7c478bd9Sstevel@tonic-gate } 520*7c478bd9Sstevel@tonic-gate /* 521*7c478bd9Sstevel@tonic-gate * Clear out the memory between the end of the last 522*7c478bd9Sstevel@tonic-gate * section and the begining of this section. 523*7c478bd9Sstevel@tonic-gate */ 524*7c478bd9Sstevel@tonic-gate if (fill && (sh->sh_offset > hi)) { 525*7c478bd9Sstevel@tonic-gate sz = sh->sh_offset - hi; 526*7c478bd9Sstevel@tonic-gate (void) memset(start - sz, byte, sz); 527*7c478bd9Sstevel@tonic-gate } 528*7c478bd9Sstevel@tonic-gate 529*7c478bd9Sstevel@tonic-gate 530*7c478bd9Sstevel@tonic-gate for (d = s->s_hdnode, prevd = 0; 531*7c478bd9Sstevel@tonic-gate d != 0; prevd = d, d = d->db_next) { 532*7c478bd9Sstevel@tonic-gate d->db_uflags &= ~ELF_F_DIRTY; 533*7c478bd9Sstevel@tonic-gate here = start + d->db_data.d_off; 534*7c478bd9Sstevel@tonic-gate 535*7c478bd9Sstevel@tonic-gate /* 536*7c478bd9Sstevel@tonic-gate * Clear out the memory between the end of the 537*7c478bd9Sstevel@tonic-gate * last update and the start of this data buffer. 538*7c478bd9Sstevel@tonic-gate */ 539*7c478bd9Sstevel@tonic-gate if (fill && (d->db_data.d_off > off)) { 540*7c478bd9Sstevel@tonic-gate sz = (Xword)(d->db_data.d_off - off); 541*7c478bd9Sstevel@tonic-gate (void) memset(here - sz, byte, sz); 542*7c478bd9Sstevel@tonic-gate } 543*7c478bd9Sstevel@tonic-gate 544*7c478bd9Sstevel@tonic-gate if ((d->db_myflags & DBF_READY) == 0) { 545*7c478bd9Sstevel@tonic-gate SCNLOCK(s); 546*7c478bd9Sstevel@tonic-gate if (_elf_locked_getdata(s, &prevd->db_data) != 547*7c478bd9Sstevel@tonic-gate &d->db_data) { 548*7c478bd9Sstevel@tonic-gate elf->ed_uflags |= ELF_F_DIRTY; 549*7c478bd9Sstevel@tonic-gate SCNUNLOCK(s); 550*7c478bd9Sstevel@tonic-gate return (0); 551*7c478bd9Sstevel@tonic-gate } 552*7c478bd9Sstevel@tonic-gate SCNUNLOCK(s); 553*7c478bd9Sstevel@tonic-gate } 554*7c478bd9Sstevel@tonic-gate dst.d_buf = (Elf_Void *)here; 555*7c478bd9Sstevel@tonic-gate dst.d_size = d->db_osz; 556*7c478bd9Sstevel@tonic-gate 557*7c478bd9Sstevel@tonic-gate /* 558*7c478bd9Sstevel@tonic-gate * Copy the translated bits out to the destination 559*7c478bd9Sstevel@tonic-gate * image. 560*7c478bd9Sstevel@tonic-gate */ 561*7c478bd9Sstevel@tonic-gate if (elf_xlatetof(&dst, &d->db_data, encode) == 0) { 562*7c478bd9Sstevel@tonic-gate elf->ed_uflags |= ELF_F_DIRTY; 563*7c478bd9Sstevel@tonic-gate return (0); 564*7c478bd9Sstevel@tonic-gate } 565*7c478bd9Sstevel@tonic-gate 566*7c478bd9Sstevel@tonic-gate off = (Xword)(d->db_data.d_off + dst.d_size); 567*7c478bd9Sstevel@tonic-gate } 568*7c478bd9Sstevel@tonic-gate hi = sh->sh_offset + sh->sh_size; 569*7c478bd9Sstevel@tonic-gate } 570*7c478bd9Sstevel@tonic-gate 571*7c478bd9Sstevel@tonic-gate /* 572*7c478bd9Sstevel@tonic-gate * Shdr table last 573*7c478bd9Sstevel@tonic-gate */ 574*7c478bd9Sstevel@tonic-gate 575*7c478bd9Sstevel@tonic-gate if (fill && (eh->e_shoff > hi)) { 576*7c478bd9Sstevel@tonic-gate sz = eh->e_shoff - hi; 577*7c478bd9Sstevel@tonic-gate (void) memset(image + hi, byte, sz); 578*7c478bd9Sstevel@tonic-gate } 579*7c478bd9Sstevel@tonic-gate 580*7c478bd9Sstevel@tonic-gate src.d_type = ELF_T_SHDR; 581*7c478bd9Sstevel@tonic-gate src.d_size = sizeof (Shdr); 582*7c478bd9Sstevel@tonic-gate dst.d_buf = (Elf_Void *)(image + eh->e_shoff); 583*7c478bd9Sstevel@tonic-gate dst.d_size = eh->e_shentsize; 584*7c478bd9Sstevel@tonic-gate for (s = elf->ed_hdscn; s != 0; s = s->s_next) { 585*7c478bd9Sstevel@tonic-gate assert((uintptr_t)dst.d_buf < ((uintptr_t)image + outsz)); 586*7c478bd9Sstevel@tonic-gate s->s_shflags &= ~ELF_F_DIRTY; 587*7c478bd9Sstevel@tonic-gate s->s_uflags &= ~ELF_F_DIRTY; 588*7c478bd9Sstevel@tonic-gate src.d_buf = s->s_shdr; 589*7c478bd9Sstevel@tonic-gate 590*7c478bd9Sstevel@tonic-gate if (elf_xlatetof(&dst, &src, encode) == 0) { 591*7c478bd9Sstevel@tonic-gate elf->ed_uflags |= ELF_F_DIRTY; 592*7c478bd9Sstevel@tonic-gate return (0); 593*7c478bd9Sstevel@tonic-gate } 594*7c478bd9Sstevel@tonic-gate 595*7c478bd9Sstevel@tonic-gate dst.d_buf = (char *)dst.d_buf + eh->e_shentsize; 596*7c478bd9Sstevel@tonic-gate } 597*7c478bd9Sstevel@tonic-gate /* 598*7c478bd9Sstevel@tonic-gate * ELF_C_WRIMAGE signifyes that we build the memory image, but 599*7c478bd9Sstevel@tonic-gate * that we do not actually write it to disk. This is used 600*7c478bd9Sstevel@tonic-gate * by ld(1) to build up a full image of an elf file and then 601*7c478bd9Sstevel@tonic-gate * to process the file before it's actually written out to 602*7c478bd9Sstevel@tonic-gate * disk. This saves ld(1) the overhead of having to write 603*7c478bd9Sstevel@tonic-gate * the image out to disk twice. 604*7c478bd9Sstevel@tonic-gate */ 605*7c478bd9Sstevel@tonic-gate if (update_cmd == ELF_C_WRIMAGE) { 606*7c478bd9Sstevel@tonic-gate elf->ed_uflags &= ~ELF_F_DIRTY; 607*7c478bd9Sstevel@tonic-gate elf->ed_wrimage = image; 608*7c478bd9Sstevel@tonic-gate elf->ed_wrimagesz = outsz; 609*7c478bd9Sstevel@tonic-gate return (outsz); 610*7c478bd9Sstevel@tonic-gate } 611*7c478bd9Sstevel@tonic-gate 612*7c478bd9Sstevel@tonic-gate if (_elf_outsync(elf->ed_fd, image, outsz, 613*7c478bd9Sstevel@tonic-gate ((elf->ed_myflags & EDF_IMALLOC) ? 0 : 1)) != 0) { 614*7c478bd9Sstevel@tonic-gate elf->ed_uflags &= ~ELF_F_DIRTY; 615*7c478bd9Sstevel@tonic-gate elf->ed_myflags &= ~EDF_IMALLOC; 616*7c478bd9Sstevel@tonic-gate return (outsz); 617*7c478bd9Sstevel@tonic-gate } 618*7c478bd9Sstevel@tonic-gate 619*7c478bd9Sstevel@tonic-gate elf->ed_uflags |= ELF_F_DIRTY; 620*7c478bd9Sstevel@tonic-gate return (0); 621*7c478bd9Sstevel@tonic-gate } 622*7c478bd9Sstevel@tonic-gate 623*7c478bd9Sstevel@tonic-gate 624*7c478bd9Sstevel@tonic-gate 625*7c478bd9Sstevel@tonic-gate 626*7c478bd9Sstevel@tonic-gate /* 627*7c478bd9Sstevel@tonic-gate * The following is a private interface between the linkers (ld & ld.so.1) 628*7c478bd9Sstevel@tonic-gate * and libelf: 629*7c478bd9Sstevel@tonic-gate * 630*7c478bd9Sstevel@tonic-gate * elf_update(elf, ELF_C_WRIMAGE) 631*7c478bd9Sstevel@tonic-gate * This will cause full image representing the elf file 632*7c478bd9Sstevel@tonic-gate * described by the elf pointer to be built in memory. If the 633*7c478bd9Sstevel@tonic-gate * elf pointer has a valid file descriptor associated with it 634*7c478bd9Sstevel@tonic-gate * we will attempt to build the memory image from mmap()'ed 635*7c478bd9Sstevel@tonic-gate * storage. If the elf descriptor does not have a valid 636*7c478bd9Sstevel@tonic-gate * file descriptor (opened with elf_begin(0, ELF_C_IMAGE, 0)) 637*7c478bd9Sstevel@tonic-gate * then the image will be allocated from dynamic memory (malloc()). 638*7c478bd9Sstevel@tonic-gate * 639*7c478bd9Sstevel@tonic-gate * elf_update() will return the size of the memory image built 640*7c478bd9Sstevel@tonic-gate * when sucessful. 641*7c478bd9Sstevel@tonic-gate * 642*7c478bd9Sstevel@tonic-gate * When a subsequent call to elf_update() with ELF_C_WRITE as 643*7c478bd9Sstevel@tonic-gate * the command is performed it will sync the image created 644*7c478bd9Sstevel@tonic-gate * by ELF_C_WRIMAGE to disk (if fd available) and 645*7c478bd9Sstevel@tonic-gate * free the memory allocated. 646*7c478bd9Sstevel@tonic-gate */ 647*7c478bd9Sstevel@tonic-gate 648*7c478bd9Sstevel@tonic-gate off_t 649*7c478bd9Sstevel@tonic-gate _elfxx_update(Elf * elf, Elf_Cmd cmd) 650*7c478bd9Sstevel@tonic-gate { 651*7c478bd9Sstevel@tonic-gate size_t sz; 652*7c478bd9Sstevel@tonic-gate unsigned u; 653*7c478bd9Sstevel@tonic-gate Ehdr *eh = elf->ed_ehdr; 654*7c478bd9Sstevel@tonic-gate 655*7c478bd9Sstevel@tonic-gate if (elf == 0) 656*7c478bd9Sstevel@tonic-gate return (-1); 657*7c478bd9Sstevel@tonic-gate 658*7c478bd9Sstevel@tonic-gate ELFWLOCK(elf) 659*7c478bd9Sstevel@tonic-gate switch (cmd) { 660*7c478bd9Sstevel@tonic-gate default: 661*7c478bd9Sstevel@tonic-gate _elf_seterr(EREQ_UPDATE, 0); 662*7c478bd9Sstevel@tonic-gate ELFUNLOCK(elf) 663*7c478bd9Sstevel@tonic-gate return (-1); 664*7c478bd9Sstevel@tonic-gate 665*7c478bd9Sstevel@tonic-gate case ELF_C_WRIMAGE: 666*7c478bd9Sstevel@tonic-gate if ((elf->ed_myflags & EDF_WRITE) == 0) { 667*7c478bd9Sstevel@tonic-gate _elf_seterr(EREQ_UPDWRT, 0); 668*7c478bd9Sstevel@tonic-gate ELFUNLOCK(elf) 669*7c478bd9Sstevel@tonic-gate return (-1); 670*7c478bd9Sstevel@tonic-gate } 671*7c478bd9Sstevel@tonic-gate break; 672*7c478bd9Sstevel@tonic-gate case ELF_C_WRITE: 673*7c478bd9Sstevel@tonic-gate if ((elf->ed_myflags & EDF_WRITE) == 0) { 674*7c478bd9Sstevel@tonic-gate _elf_seterr(EREQ_UPDWRT, 0); 675*7c478bd9Sstevel@tonic-gate ELFUNLOCK(elf) 676*7c478bd9Sstevel@tonic-gate return (-1); 677*7c478bd9Sstevel@tonic-gate } 678*7c478bd9Sstevel@tonic-gate if (elf->ed_wrimage) { 679*7c478bd9Sstevel@tonic-gate if (elf->ed_myflags & EDF_WRALLOC) { 680*7c478bd9Sstevel@tonic-gate free(elf->ed_wrimage); 681*7c478bd9Sstevel@tonic-gate /* 682*7c478bd9Sstevel@tonic-gate * The size is still returned even 683*7c478bd9Sstevel@tonic-gate * though nothing is actually written 684*7c478bd9Sstevel@tonic-gate * out. This is just to be consistant 685*7c478bd9Sstevel@tonic-gate * with the rest of the interface. 686*7c478bd9Sstevel@tonic-gate */ 687*7c478bd9Sstevel@tonic-gate sz = elf->ed_wrimagesz; 688*7c478bd9Sstevel@tonic-gate elf->ed_wrimage = 0; 689*7c478bd9Sstevel@tonic-gate elf->ed_wrimagesz = 0; 690*7c478bd9Sstevel@tonic-gate ELFUNLOCK(elf); 691*7c478bd9Sstevel@tonic-gate return ((off_t)sz); 692*7c478bd9Sstevel@tonic-gate } 693*7c478bd9Sstevel@tonic-gate sz = _elf_outsync(elf->ed_fd, elf->ed_wrimage, 694*7c478bd9Sstevel@tonic-gate elf->ed_wrimagesz, 695*7c478bd9Sstevel@tonic-gate (elf->ed_myflags & EDF_IMALLOC ? 0 : 1)); 696*7c478bd9Sstevel@tonic-gate elf->ed_myflags &= ~EDF_IMALLOC; 697*7c478bd9Sstevel@tonic-gate elf->ed_wrimage = 0; 698*7c478bd9Sstevel@tonic-gate elf->ed_wrimagesz = 0; 699*7c478bd9Sstevel@tonic-gate ELFUNLOCK(elf); 700*7c478bd9Sstevel@tonic-gate return ((off_t)sz); 701*7c478bd9Sstevel@tonic-gate } 702*7c478bd9Sstevel@tonic-gate /* FALLTHROUGH */ 703*7c478bd9Sstevel@tonic-gate case ELF_C_NULL: 704*7c478bd9Sstevel@tonic-gate break; 705*7c478bd9Sstevel@tonic-gate } 706*7c478bd9Sstevel@tonic-gate 707*7c478bd9Sstevel@tonic-gate if (eh == 0) { 708*7c478bd9Sstevel@tonic-gate _elf_seterr(ESEQ_EHDR, 0); 709*7c478bd9Sstevel@tonic-gate ELFUNLOCK(elf) 710*7c478bd9Sstevel@tonic-gate return (-1); 711*7c478bd9Sstevel@tonic-gate } 712*7c478bd9Sstevel@tonic-gate 713*7c478bd9Sstevel@tonic-gate if ((u = eh->e_version) > EV_CURRENT) { 714*7c478bd9Sstevel@tonic-gate _elf_seterr(EREQ_VER, 0); 715*7c478bd9Sstevel@tonic-gate ELFUNLOCK(elf) 716*7c478bd9Sstevel@tonic-gate return (-1); 717*7c478bd9Sstevel@tonic-gate } 718*7c478bd9Sstevel@tonic-gate 719*7c478bd9Sstevel@tonic-gate if (u == EV_NONE) 720*7c478bd9Sstevel@tonic-gate eh->e_version = EV_CURRENT; 721*7c478bd9Sstevel@tonic-gate 722*7c478bd9Sstevel@tonic-gate if ((u = eh->e_ident[EI_DATA]) == ELFDATANONE) { 723*7c478bd9Sstevel@tonic-gate unsigned encode; 724*7c478bd9Sstevel@tonic-gate 725*7c478bd9Sstevel@tonic-gate ELFACCESSDATA(encode, _elf_encode) 726*7c478bd9Sstevel@tonic-gate if (encode == ELFDATANONE) { 727*7c478bd9Sstevel@tonic-gate _elf_seterr(EREQ_ENCODE, 0); 728*7c478bd9Sstevel@tonic-gate ELFUNLOCK(elf) 729*7c478bd9Sstevel@tonic-gate return (-1); 730*7c478bd9Sstevel@tonic-gate } 731*7c478bd9Sstevel@tonic-gate /* LINTED */ 732*7c478bd9Sstevel@tonic-gate eh->e_ident[EI_DATA] = (Byte)encode; 733*7c478bd9Sstevel@tonic-gate } 734*7c478bd9Sstevel@tonic-gate 735*7c478bd9Sstevel@tonic-gate u = 1; 736*7c478bd9Sstevel@tonic-gate if (elf->ed_uflags & ELF_F_LAYOUT) { 737*7c478bd9Sstevel@tonic-gate sz = _elf_upd_usr(elf); 738*7c478bd9Sstevel@tonic-gate u = 0; 739*7c478bd9Sstevel@tonic-gate } else 740*7c478bd9Sstevel@tonic-gate sz = _elf_upd_lib(elf); 741*7c478bd9Sstevel@tonic-gate 742*7c478bd9Sstevel@tonic-gate if ((sz != 0) && ((cmd == ELF_C_WRITE) || (cmd == ELF_C_WRIMAGE))) 743*7c478bd9Sstevel@tonic-gate sz = wrt(elf, (Xword)sz, u, cmd); 744*7c478bd9Sstevel@tonic-gate 745*7c478bd9Sstevel@tonic-gate if (sz == 0) { 746*7c478bd9Sstevel@tonic-gate ELFUNLOCK(elf) 747*7c478bd9Sstevel@tonic-gate return (-1); 748*7c478bd9Sstevel@tonic-gate } 749*7c478bd9Sstevel@tonic-gate 750*7c478bd9Sstevel@tonic-gate ELFUNLOCK(elf) 751*7c478bd9Sstevel@tonic-gate return ((off_t)sz); 752*7c478bd9Sstevel@tonic-gate } 753*7c478bd9Sstevel@tonic-gate 754*7c478bd9Sstevel@tonic-gate 755*7c478bd9Sstevel@tonic-gate #ifndef _ELF64 756*7c478bd9Sstevel@tonic-gate /* class-independent, only needs to be compiled once */ 757*7c478bd9Sstevel@tonic-gate 758*7c478bd9Sstevel@tonic-gate off_t 759*7c478bd9Sstevel@tonic-gate elf_update(Elf *elf, Elf_Cmd cmd) 760*7c478bd9Sstevel@tonic-gate { 761*7c478bd9Sstevel@tonic-gate if (elf == 0) 762*7c478bd9Sstevel@tonic-gate return (-1); 763*7c478bd9Sstevel@tonic-gate 764*7c478bd9Sstevel@tonic-gate if (elf->ed_class == ELFCLASS32) 765*7c478bd9Sstevel@tonic-gate return (_elf32_update(elf, cmd)); 766*7c478bd9Sstevel@tonic-gate else if (elf->ed_class == ELFCLASS64) { 767*7c478bd9Sstevel@tonic-gate return (_elf64_update(elf, cmd)); 768*7c478bd9Sstevel@tonic-gate } 769*7c478bd9Sstevel@tonic-gate 770*7c478bd9Sstevel@tonic-gate _elf_seterr(EREQ_CLASS, 0); 771*7c478bd9Sstevel@tonic-gate return (-1); 772*7c478bd9Sstevel@tonic-gate } 773*7c478bd9Sstevel@tonic-gate 774*7c478bd9Sstevel@tonic-gate /* 775*7c478bd9Sstevel@tonic-gate * 4106312, 4106398, This is an ad-hoc means for the 32-bit 776*7c478bd9Sstevel@tonic-gate * Elf64 version of libld.so.3 to get around the limitation 777*7c478bd9Sstevel@tonic-gate * of a 32-bit d_off field. This is only intended to be 778*7c478bd9Sstevel@tonic-gate * used by libld to relocate symbols in large NOBITS sections. 779*7c478bd9Sstevel@tonic-gate */ 780*7c478bd9Sstevel@tonic-gate Elf64_Off 781*7c478bd9Sstevel@tonic-gate _elf_getxoff(Elf_Data * d) 782*7c478bd9Sstevel@tonic-gate { 783*7c478bd9Sstevel@tonic-gate return (((Dnode *)d)->db_xoff); 784*7c478bd9Sstevel@tonic-gate } 785*7c478bd9Sstevel@tonic-gate #endif /* !_ELF64 */ 786