1*0Sstevel@tonic-gate /* 2*0Sstevel@tonic-gate * CDDL HEADER START 3*0Sstevel@tonic-gate * 4*0Sstevel@tonic-gate * The contents of this file are subject to the terms of the 5*0Sstevel@tonic-gate * Common Development and Distribution License, Version 1.0 only 6*0Sstevel@tonic-gate * (the "License"). You may not use this file except in compliance 7*0Sstevel@tonic-gate * with the License. 8*0Sstevel@tonic-gate * 9*0Sstevel@tonic-gate * You can obtain a copy of the license at usr/src/OPENSOLARIS.LICENSE 10*0Sstevel@tonic-gate * or http://www.opensolaris.org/os/licensing. 11*0Sstevel@tonic-gate * See the License for the specific language governing permissions 12*0Sstevel@tonic-gate * and limitations under the License. 13*0Sstevel@tonic-gate * 14*0Sstevel@tonic-gate * When distributing Covered Code, include this CDDL HEADER in each 15*0Sstevel@tonic-gate * file and include the License file at usr/src/OPENSOLARIS.LICENSE. 16*0Sstevel@tonic-gate * If applicable, add the following below this CDDL HEADER, with the 17*0Sstevel@tonic-gate * fields enclosed by brackets "[]" replaced with your own identifying 18*0Sstevel@tonic-gate * information: Portions Copyright [yyyy] [name of copyright owner] 19*0Sstevel@tonic-gate * 20*0Sstevel@tonic-gate * CDDL HEADER END 21*0Sstevel@tonic-gate */ 22*0Sstevel@tonic-gate /* Copyright (c) 1988 AT&T */ 23*0Sstevel@tonic-gate /* All Rights Reserved */ 24*0Sstevel@tonic-gate 25*0Sstevel@tonic-gate 26*0Sstevel@tonic-gate /* 27*0Sstevel@tonic-gate * Copyright 2004 Sun Microsystems, Inc. All rights reserved. 28*0Sstevel@tonic-gate * Use is subject to license terms. 29*0Sstevel@tonic-gate */ 30*0Sstevel@tonic-gate 31*0Sstevel@tonic-gate 32*0Sstevel@tonic-gate #pragma ident "%Z%%M% %I% %E% SMI" /* SVr4.0 1.16 */ 33*0Sstevel@tonic-gate 34*0Sstevel@tonic-gate 35*0Sstevel@tonic-gate #pragma weak elf_getdata = _elf_getdata 36*0Sstevel@tonic-gate 37*0Sstevel@tonic-gate 38*0Sstevel@tonic-gate #include "syn.h" 39*0Sstevel@tonic-gate #include <stdlib.h> 40*0Sstevel@tonic-gate #include <assert.h> 41*0Sstevel@tonic-gate #include <errno.h> 42*0Sstevel@tonic-gate #include <libelf.h> 43*0Sstevel@tonic-gate #include "decl.h" 44*0Sstevel@tonic-gate #include "msg.h" 45*0Sstevel@tonic-gate 46*0Sstevel@tonic-gate 47*0Sstevel@tonic-gate /* 48*0Sstevel@tonic-gate * Convert data from file format to memory format. 49*0Sstevel@tonic-gate */ 50*0Sstevel@tonic-gate 51*0Sstevel@tonic-gate 52*0Sstevel@tonic-gate static const size_t align32[ELF_T_NUM] = 53*0Sstevel@tonic-gate { 54*0Sstevel@tonic-gate 1, /* ELF_T_BYTE */ 55*0Sstevel@tonic-gate sizeof (Elf32), /* ELF_T_ADDR */ 56*0Sstevel@tonic-gate sizeof (Elf32), /* ELF_T_DYN */ 57*0Sstevel@tonic-gate sizeof (Elf32), /* ELF_T_EHDR */ 58*0Sstevel@tonic-gate sizeof (Elf32_Half), /* ELF_T_HALF */ 59*0Sstevel@tonic-gate sizeof (Elf32), /* ELF_T_OFF */ 60*0Sstevel@tonic-gate sizeof (Elf32), /* ELF_T_PHDR */ 61*0Sstevel@tonic-gate sizeof (Elf32), /* ELF_T_RELA */ 62*0Sstevel@tonic-gate sizeof (Elf32), /* ELF_T_REL */ 63*0Sstevel@tonic-gate sizeof (Elf32), /* ELF_T_SHDR */ 64*0Sstevel@tonic-gate sizeof (Elf32), /* ELF_T_SWORD */ 65*0Sstevel@tonic-gate sizeof (Elf32), /* ELF_T_SYM */ 66*0Sstevel@tonic-gate sizeof (Elf32), /* ELF_T_WORD */ 67*0Sstevel@tonic-gate sizeof (Elf32), /* ELF_T_VERDEF */ 68*0Sstevel@tonic-gate sizeof (Elf32), /* ELF_T_VERNEED */ 69*0Sstevel@tonic-gate sizeof (Elf64_Sxword), /* ELF_T_SXWORD */ 70*0Sstevel@tonic-gate sizeof (Elf64), /* ELF_T_XWORD */ 71*0Sstevel@tonic-gate sizeof (Elf32_Half), /* ELF_T_SYMINFO */ 72*0Sstevel@tonic-gate sizeof (Elf32), /* ELF_T_NOTE */ 73*0Sstevel@tonic-gate sizeof (Elf32_Lword), /* ELF_T_MOVE */ 74*0Sstevel@tonic-gate sizeof (Elf32_Lword), /* ELF_T_MOVEP */ 75*0Sstevel@tonic-gate sizeof (Elf32_Word) /* ELF_T_CAP */ 76*0Sstevel@tonic-gate 77*0Sstevel@tonic-gate }; 78*0Sstevel@tonic-gate 79*0Sstevel@tonic-gate #define Nalign32 (sizeof (align32)/sizeof (align32[0])) 80*0Sstevel@tonic-gate 81*0Sstevel@tonic-gate static const size_t align64[ELF_T_NUM] = 82*0Sstevel@tonic-gate { 83*0Sstevel@tonic-gate 1, /* ELF_T_BYTE */ 84*0Sstevel@tonic-gate sizeof (Elf64), /* ELF_T_ADDR */ 85*0Sstevel@tonic-gate sizeof (Elf64), /* ELF_T_DYN */ 86*0Sstevel@tonic-gate sizeof (Elf64), /* ELF_T_EHDR */ 87*0Sstevel@tonic-gate sizeof (Elf64_Half), /* ELF_T_HALF */ 88*0Sstevel@tonic-gate sizeof (Elf64), /* ELF_T_OFF */ 89*0Sstevel@tonic-gate sizeof (Elf64), /* ELF_T_PHDR */ 90*0Sstevel@tonic-gate sizeof (Elf64), /* ELF_T_RELA */ 91*0Sstevel@tonic-gate sizeof (Elf64), /* ELF_T_REL */ 92*0Sstevel@tonic-gate sizeof (Elf64), /* ELF_T_SHDR */ 93*0Sstevel@tonic-gate sizeof (Elf64_Word), /* ELF_T_SWORD */ 94*0Sstevel@tonic-gate sizeof (Elf64), /* ELF_T_SYM */ 95*0Sstevel@tonic-gate sizeof (Elf64_Word), /* ELF_T_WORD */ 96*0Sstevel@tonic-gate sizeof (Elf64), /* ELF_T_VDEF */ 97*0Sstevel@tonic-gate sizeof (Elf64), /* ELF_T_VNEED */ 98*0Sstevel@tonic-gate sizeof (Elf64), /* ELF_T_SXWORD */ 99*0Sstevel@tonic-gate sizeof (Elf64), /* ELF_T_XWORD */ 100*0Sstevel@tonic-gate sizeof (Elf32_Half), /* ELF_T_SYMINFO */ 101*0Sstevel@tonic-gate sizeof (Elf32), /* ELF_T_NOTE */ 102*0Sstevel@tonic-gate sizeof (Elf64), /* ELF_T_MOVE */ 103*0Sstevel@tonic-gate sizeof (Elf64), /* ELF_T_MOVEP */ 104*0Sstevel@tonic-gate sizeof (Elf64_Word) /* ELF_T_CAP */ 105*0Sstevel@tonic-gate }; 106*0Sstevel@tonic-gate 107*0Sstevel@tonic-gate #define Nalign64 (sizeof (align64)/sizeof (align64[0])) 108*0Sstevel@tonic-gate 109*0Sstevel@tonic-gate 110*0Sstevel@tonic-gate /* 111*0Sstevel@tonic-gate * Could use an array indexed by ELFCLASS*, but I'd rather 112*0Sstevel@tonic-gate * avoid .data over something this infrequently used. The 113*0Sstevel@tonic-gate * next choice would be to add extra conditionals. 114*0Sstevel@tonic-gate */ 115*0Sstevel@tonic-gate #define NALIGN(elf) ((elf->ed_class == ELFCLASS32) ? Nalign32 : Nalign64) 116*0Sstevel@tonic-gate #define ALIGN(elf) ((elf->ed_class == ELFCLASS32) ? align32 : align64) 117*0Sstevel@tonic-gate 118*0Sstevel@tonic-gate 119*0Sstevel@tonic-gate Elf_Data * 120*0Sstevel@tonic-gate _elf_locked_getdata(Elf_Scn * scn, Elf_Data * data) 121*0Sstevel@tonic-gate { 122*0Sstevel@tonic-gate Dnode * d = (Dnode *)data; 123*0Sstevel@tonic-gate Elf * elf; 124*0Sstevel@tonic-gate Elf_Data src; 125*0Sstevel@tonic-gate unsigned work; 126*0Sstevel@tonic-gate 127*0Sstevel@tonic-gate assert(!elf_threaded || RW_LOCK_HELD(&(scn->s_elf->ed_rwlock))); 128*0Sstevel@tonic-gate assert(!elf_threaded || MUTEX_HELD(&(scn->s_mutex))); 129*0Sstevel@tonic-gate elf = scn->s_elf; 130*0Sstevel@tonic-gate 131*0Sstevel@tonic-gate if ((scn->s_myflags & SF_READY) == 0) { 132*0Sstevel@tonic-gate UPGRADELOCKS(elf, scn) 133*0Sstevel@tonic-gate /* 134*0Sstevel@tonic-gate * make sure someone else didn't come along and cook 135*0Sstevel@tonic-gate * this stuff. 136*0Sstevel@tonic-gate */ 137*0Sstevel@tonic-gate if ((scn->s_myflags & SF_READY) == 0) 138*0Sstevel@tonic-gate (void) _elf_cookscn(scn); 139*0Sstevel@tonic-gate DOWNGRADELOCKS(elf, scn) 140*0Sstevel@tonic-gate } 141*0Sstevel@tonic-gate 142*0Sstevel@tonic-gate if (d == 0) 143*0Sstevel@tonic-gate d = scn->s_hdnode; 144*0Sstevel@tonic-gate else 145*0Sstevel@tonic-gate d = d->db_next; 146*0Sstevel@tonic-gate 147*0Sstevel@tonic-gate if (scn->s_err != 0) { 148*0Sstevel@tonic-gate /*LINTED*/ 149*0Sstevel@tonic-gate _elf_seterr((Msg)scn->s_err, 0); 150*0Sstevel@tonic-gate return (0); 151*0Sstevel@tonic-gate } 152*0Sstevel@tonic-gate 153*0Sstevel@tonic-gate if (d == 0) { 154*0Sstevel@tonic-gate return (0); 155*0Sstevel@tonic-gate } 156*0Sstevel@tonic-gate 157*0Sstevel@tonic-gate if (d->db_scn != scn) { 158*0Sstevel@tonic-gate _elf_seterr(EREQ_DATA, 0); 159*0Sstevel@tonic-gate return (0); 160*0Sstevel@tonic-gate } 161*0Sstevel@tonic-gate 162*0Sstevel@tonic-gate if (d->db_myflags & DBF_READY) { 163*0Sstevel@tonic-gate return (&d->db_data); 164*0Sstevel@tonic-gate } 165*0Sstevel@tonic-gate elf = scn->s_elf; 166*0Sstevel@tonic-gate 167*0Sstevel@tonic-gate /* 168*0Sstevel@tonic-gate * Prepare return buffer. The data comes from the memory 169*0Sstevel@tonic-gate * image of the file. "Empty" regions get an empty buffer. 170*0Sstevel@tonic-gate * 171*0Sstevel@tonic-gate * Only sections of an ELF_C_READ file can be not READY here. 172*0Sstevel@tonic-gate * Furthermore, the input file must have been cooked or 173*0Sstevel@tonic-gate * frozen by now. Translate cooked files in place if possible. 174*0Sstevel@tonic-gate */ 175*0Sstevel@tonic-gate 176*0Sstevel@tonic-gate ELFACCESSDATA(work, _elf_work) 177*0Sstevel@tonic-gate d->db_data.d_version = work; 178*0Sstevel@tonic-gate if ((d->db_off == 0) || (d->db_fsz == 0)) { 179*0Sstevel@tonic-gate d->db_myflags |= DBF_READY; 180*0Sstevel@tonic-gate return (&d->db_data); 181*0Sstevel@tonic-gate } 182*0Sstevel@tonic-gate 183*0Sstevel@tonic-gate if (elf->ed_class == ELFCLASS32) { 184*0Sstevel@tonic-gate Elf32_Shdr *sh = scn->s_shdr; 185*0Sstevel@tonic-gate size_t sz = sh->sh_entsize; 186*0Sstevel@tonic-gate Elf_Type t = d->db_data.d_type; 187*0Sstevel@tonic-gate 188*0Sstevel@tonic-gate if ((t != ELF_T_BYTE) && 189*0Sstevel@tonic-gate (sz > 1) && (sz != elf32_fsize(t, 1, elf->ed_version))) { 190*0Sstevel@tonic-gate _elf_seterr(EFMT_ENTSZ, 0); 191*0Sstevel@tonic-gate return (0); 192*0Sstevel@tonic-gate } 193*0Sstevel@tonic-gate } else if (elf->ed_class == ELFCLASS64) { 194*0Sstevel@tonic-gate Elf64_Shdr *sh = scn->s_shdr; 195*0Sstevel@tonic-gate Elf64_Xword sz = sh->sh_entsize; 196*0Sstevel@tonic-gate Elf_Type t = d->db_data.d_type; 197*0Sstevel@tonic-gate 198*0Sstevel@tonic-gate if (t != ELF_T_BYTE && sz > 1 && 199*0Sstevel@tonic-gate sz != elf64_fsize(t, 1, elf->ed_version)) { 200*0Sstevel@tonic-gate _elf_seterr(EFMT_ENTSZ, 0); 201*0Sstevel@tonic-gate return (0); 202*0Sstevel@tonic-gate } 203*0Sstevel@tonic-gate } else { 204*0Sstevel@tonic-gate _elf_seterr(EREQ_CLASS, 0); 205*0Sstevel@tonic-gate return (0); 206*0Sstevel@tonic-gate } 207*0Sstevel@tonic-gate 208*0Sstevel@tonic-gate 209*0Sstevel@tonic-gate /* 210*0Sstevel@tonic-gate * validate the region 211*0Sstevel@tonic-gate */ 212*0Sstevel@tonic-gate 213*0Sstevel@tonic-gate if ((d->db_off < 0) || (d->db_off >= elf->ed_fsz) || 214*0Sstevel@tonic-gate (elf->ed_fsz - d->db_off < d->db_fsz)) { 215*0Sstevel@tonic-gate _elf_seterr(EFMT_DATA, 0); 216*0Sstevel@tonic-gate return (0); 217*0Sstevel@tonic-gate } 218*0Sstevel@tonic-gate 219*0Sstevel@tonic-gate /* 220*0Sstevel@tonic-gate * set up translation buffers and validate 221*0Sstevel@tonic-gate */ 222*0Sstevel@tonic-gate 223*0Sstevel@tonic-gate src.d_buf = (Elf_Void *)(elf->ed_ident + d->db_off); 224*0Sstevel@tonic-gate src.d_size = d->db_fsz; 225*0Sstevel@tonic-gate src.d_type = d->db_data.d_type; 226*0Sstevel@tonic-gate src.d_version = elf->ed_version; 227*0Sstevel@tonic-gate if (elf->ed_vm) { 228*0Sstevel@tonic-gate UPGRADELOCKS(elf, scn) 229*0Sstevel@tonic-gate if (_elf_vm(elf, (size_t)d->db_off, d->db_fsz) != OK_YES) { 230*0Sstevel@tonic-gate DOWNGRADELOCKS(elf, scn) 231*0Sstevel@tonic-gate return (0); 232*0Sstevel@tonic-gate } 233*0Sstevel@tonic-gate DOWNGRADELOCKS(elf, scn) 234*0Sstevel@tonic-gate } 235*0Sstevel@tonic-gate 236*0Sstevel@tonic-gate /* 237*0Sstevel@tonic-gate * decide where to put destination 238*0Sstevel@tonic-gate */ 239*0Sstevel@tonic-gate 240*0Sstevel@tonic-gate switch (elf->ed_status) { 241*0Sstevel@tonic-gate case ES_COOKED: 242*0Sstevel@tonic-gate if ((size_t)d->db_data.d_type >= NALIGN(elf)) { 243*0Sstevel@tonic-gate _elf_seterr(EBUG_COOKTYPE, 0); 244*0Sstevel@tonic-gate return (0); 245*0Sstevel@tonic-gate } 246*0Sstevel@tonic-gate 247*0Sstevel@tonic-gate /* 248*0Sstevel@tonic-gate * If the destination size (memory) is at least as 249*0Sstevel@tonic-gate * big as the source size (file), reuse the space. 250*0Sstevel@tonic-gate */ 251*0Sstevel@tonic-gate 252*0Sstevel@tonic-gate if ((d->db_data.d_size <= src.d_size) && 253*0Sstevel@tonic-gate (d->db_off % ALIGN(elf)[d->db_data.d_type] == 0)) { 254*0Sstevel@tonic-gate d->db_data.d_buf = (Elf_Void *)(elf->ed_ident + 255*0Sstevel@tonic-gate d->db_off); 256*0Sstevel@tonic-gate break; 257*0Sstevel@tonic-gate } 258*0Sstevel@tonic-gate 259*0Sstevel@tonic-gate /*FALLTHRU*/ 260*0Sstevel@tonic-gate case ES_FROZEN: 261*0Sstevel@tonic-gate if ((d->db_buf = malloc(d->db_data.d_size)) == 0) { 262*0Sstevel@tonic-gate _elf_seterr(EMEM_DATA, errno); 263*0Sstevel@tonic-gate return (0); 264*0Sstevel@tonic-gate } 265*0Sstevel@tonic-gate d->db_data.d_buf = d->db_buf; 266*0Sstevel@tonic-gate break; 267*0Sstevel@tonic-gate 268*0Sstevel@tonic-gate default: 269*0Sstevel@tonic-gate _elf_seterr(EBUG_COOKSTAT, 0); 270*0Sstevel@tonic-gate return (0); 271*0Sstevel@tonic-gate } 272*0Sstevel@tonic-gate 273*0Sstevel@tonic-gate if (elf->ed_class == ELFCLASS32) { 274*0Sstevel@tonic-gate if (elf32_xlatetom(&d->db_data, &src, elf->ed_encode) == 0) 275*0Sstevel@tonic-gate return (0); 276*0Sstevel@tonic-gate } else { /* ELFCLASS64 */ 277*0Sstevel@tonic-gate if (elf64_xlatetom(&d->db_data, &src, elf->ed_encode) == 0) 278*0Sstevel@tonic-gate return (0); 279*0Sstevel@tonic-gate } 280*0Sstevel@tonic-gate d->db_myflags |= DBF_READY; 281*0Sstevel@tonic-gate 282*0Sstevel@tonic-gate return (&d->db_data); 283*0Sstevel@tonic-gate } 284*0Sstevel@tonic-gate 285*0Sstevel@tonic-gate Elf_Data * 286*0Sstevel@tonic-gate elf_getdata(Elf_Scn * scn, Elf_Data * data) 287*0Sstevel@tonic-gate { 288*0Sstevel@tonic-gate Elf_Data * rc; 289*0Sstevel@tonic-gate Elf * elf; 290*0Sstevel@tonic-gate 291*0Sstevel@tonic-gate /* 292*0Sstevel@tonic-gate * trap null args, end of list, previous buffer. 293*0Sstevel@tonic-gate * SHT_NULL sections have no buffer list, so they 294*0Sstevel@tonic-gate * fall out here too. 295*0Sstevel@tonic-gate */ 296*0Sstevel@tonic-gate if (scn == 0) 297*0Sstevel@tonic-gate return (0); 298*0Sstevel@tonic-gate 299*0Sstevel@tonic-gate elf = scn->s_elf; 300*0Sstevel@tonic-gate READLOCKS(elf, scn); 301*0Sstevel@tonic-gate rc = _elf_locked_getdata(scn, data); 302*0Sstevel@tonic-gate READUNLOCKS(elf, scn); 303*0Sstevel@tonic-gate return (rc); 304*0Sstevel@tonic-gate } 305