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 /*
23*0Sstevel@tonic-gate * Copyright 2004 Sun Microsystems, Inc. All rights reserved.
24*0Sstevel@tonic-gate * Use is subject to license terms.
25*0Sstevel@tonic-gate */
26*0Sstevel@tonic-gate
27*0Sstevel@tonic-gate #pragma ident "%Z%%M% %I% %E% SMI"
28*0Sstevel@tonic-gate
29*0Sstevel@tonic-gate #include <stdio.h>
30*0Sstevel@tonic-gate #include <string.h>
31*0Sstevel@tonic-gate #include <libelf.h>
32*0Sstevel@tonic-gate #include <gelf.h>
33*0Sstevel@tonic-gate
34*0Sstevel@tonic-gate #include <findfp.h>
35*0Sstevel@tonic-gate #include <util.h>
36*0Sstevel@tonic-gate
37*0Sstevel@tonic-gate int
findelfsym(Elf * elf,uintptr_t addr,char ** symnamep,offset_t * offp)38*0Sstevel@tonic-gate findelfsym(Elf *elf, uintptr_t addr, char **symnamep, offset_t *offp)
39*0Sstevel@tonic-gate {
40*0Sstevel@tonic-gate Elf_Data *symtab;
41*0Sstevel@tonic-gate GElf_Shdr shdr;
42*0Sstevel@tonic-gate Elf_Scn *scn;
43*0Sstevel@tonic-gate int symtabidx, nent, i;
44*0Sstevel@tonic-gate
45*0Sstevel@tonic-gate if ((symtabidx = findelfsecidx(elf, ".symtab")) < 0)
46*0Sstevel@tonic-gate elfdie("failed to find .symtab\n");
47*0Sstevel@tonic-gate
48*0Sstevel@tonic-gate if ((scn = elf_getscn(elf, symtabidx)) == NULL ||
49*0Sstevel@tonic-gate gelf_getshdr(scn, &shdr) == NULL ||
50*0Sstevel@tonic-gate (symtab = elf_getdata(scn, NULL)) == NULL)
51*0Sstevel@tonic-gate elfdie("failed to read .symtab");
52*0Sstevel@tonic-gate
53*0Sstevel@tonic-gate nent = shdr.sh_size / shdr.sh_entsize;
54*0Sstevel@tonic-gate
55*0Sstevel@tonic-gate for (i = 0; i < nent; i++) {
56*0Sstevel@tonic-gate GElf_Sym sym;
57*0Sstevel@tonic-gate
58*0Sstevel@tonic-gate if (gelf_getsym(symtab, i, &sym) == NULL)
59*0Sstevel@tonic-gate elfdie("failed to get symbol at idx %d", i);
60*0Sstevel@tonic-gate
61*0Sstevel@tonic-gate if ((GELF_ST_TYPE(sym.st_info) != STT_FUNC &&
62*0Sstevel@tonic-gate GELF_ST_TYPE(sym.st_info) != STT_OBJECT) ||
63*0Sstevel@tonic-gate sym.st_shndx == SHN_UNDEF)
64*0Sstevel@tonic-gate continue;
65*0Sstevel@tonic-gate
66*0Sstevel@tonic-gate if (addr - sym.st_value < sym.st_size) {
67*0Sstevel@tonic-gate /* matched */
68*0Sstevel@tonic-gate if ((*symnamep = elf_strptr(elf, shdr.sh_link,
69*0Sstevel@tonic-gate sym.st_name)) == NULL)
70*0Sstevel@tonic-gate elfdie("failed to get name for sym %d", i);
71*0Sstevel@tonic-gate *offp = addr - sym.st_value;
72*0Sstevel@tonic-gate return (1);
73*0Sstevel@tonic-gate }
74*0Sstevel@tonic-gate }
75*0Sstevel@tonic-gate
76*0Sstevel@tonic-gate return (0);
77*0Sstevel@tonic-gate }
78