1 /* 2 * CDDL HEADER START 3 * 4 * The contents of this file are subject to the terms of the 5 * Common Development and Distribution License, Version 1.0 only 6 * (the "License"). You may not use this file except in compliance 7 * with the License. 8 * 9 * You can obtain a copy of the license at usr/src/OPENSOLARIS.LICENSE 10 * or http://www.opensolaris.org/os/licensing. 11 * See the License for the specific language governing permissions 12 * and limitations under the License. 13 * 14 * When distributing Covered Code, include this CDDL HEADER in each 15 * file and include the License file at usr/src/OPENSOLARIS.LICENSE. 16 * If applicable, add the following below this CDDL HEADER, with the 17 * fields enclosed by brackets "[]" replaced with your own identifying 18 * information: Portions Copyright [yyyy] [name of copyright owner] 19 * 20 * CDDL HEADER END 21 */ 22 /* 23 * Copyright 2004 Sun Microsystems, Inc. All rights reserved. 24 * Use is subject to license terms. 25 */ 26 27 #pragma ident "%Z%%M% %I% %E% SMI" 28 29 #include <stdio.h> 30 #include <string.h> 31 #include <libelf.h> 32 #include <gelf.h> 33 34 #include <findfp.h> 35 #include <util.h> 36 37 int 38 findelfsym(Elf *elf, uintptr_t addr, char **symnamep, offset_t *offp) 39 { 40 Elf_Data *symtab; 41 GElf_Shdr shdr; 42 Elf_Scn *scn; 43 int symtabidx, nent, i; 44 45 if ((symtabidx = findelfsecidx(elf, ".symtab")) < 0) 46 elfdie("failed to find .symtab\n"); 47 48 if ((scn = elf_getscn(elf, symtabidx)) == NULL || 49 gelf_getshdr(scn, &shdr) == NULL || 50 (symtab = elf_getdata(scn, NULL)) == NULL) 51 elfdie("failed to read .symtab"); 52 53 nent = shdr.sh_size / shdr.sh_entsize; 54 55 for (i = 0; i < nent; i++) { 56 GElf_Sym sym; 57 58 if (gelf_getsym(symtab, i, &sym) == NULL) 59 elfdie("failed to get symbol at idx %d", i); 60 61 if ((GELF_ST_TYPE(sym.st_info) != STT_FUNC && 62 GELF_ST_TYPE(sym.st_info) != STT_OBJECT) || 63 sym.st_shndx == SHN_UNDEF) 64 continue; 65 66 if (addr - sym.st_value < sym.st_size) { 67 /* matched */ 68 if ((*symnamep = elf_strptr(elf, shdr.sh_link, 69 sym.st_name)) == NULL) 70 elfdie("failed to get name for sym %d", i); 71 *offp = addr - sym.st_value; 72 return (1); 73 } 74 } 75 76 return (0); 77 } 78