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 (c) 1998 by Sun Microsystems, Inc.
28*7c478bd9Sstevel@tonic-gate * All rights reserved.
29*7c478bd9Sstevel@tonic-gate */
30*7c478bd9Sstevel@tonic-gate
31*7c478bd9Sstevel@tonic-gate #include "libelf.h"
32*7c478bd9Sstevel@tonic-gate #include <unistd.h>
33*7c478bd9Sstevel@tonic-gate #include <fcntl.h>
34*7c478bd9Sstevel@tonic-gate #include <string.h>
35*7c478bd9Sstevel@tonic-gate #include <nlist.h>
36*7c478bd9Sstevel@tonic-gate #include "syms.h"
37*7c478bd9Sstevel@tonic-gate #include "gelf.h"
38*7c478bd9Sstevel@tonic-gate
39*7c478bd9Sstevel@tonic-gate #undef n_name /* This undef is to handle a #define in syms.h */
40*7c478bd9Sstevel@tonic-gate /* which conflicts with the member nlist->n_name */
41*7c478bd9Sstevel@tonic-gate /* as defined in nlist.h */
42*7c478bd9Sstevel@tonic-gate
43*7c478bd9Sstevel@tonic-gate
44*7c478bd9Sstevel@tonic-gate #define SPACE 100 /* number of symbols read at a time */
45*7c478bd9Sstevel@tonic-gate #define ISELF (strncmp(magic_buf, ELFMAG, SELFMAG) == 0)
46*7c478bd9Sstevel@tonic-gate
47*7c478bd9Sstevel@tonic-gate
48*7c478bd9Sstevel@tonic-gate int
end_elf_job(int fd,Elf * elfdes)49*7c478bd9Sstevel@tonic-gate end_elf_job(int fd, Elf * elfdes)
50*7c478bd9Sstevel@tonic-gate {
51*7c478bd9Sstevel@tonic-gate (void) elf_end(elfdes);
52*7c478bd9Sstevel@tonic-gate (void) close(fd);
53*7c478bd9Sstevel@tonic-gate return (-1);
54*7c478bd9Sstevel@tonic-gate }
55*7c478bd9Sstevel@tonic-gate
56*7c478bd9Sstevel@tonic-gate
57*7c478bd9Sstevel@tonic-gate int
_elf_nlist(int fd,struct nlist * list)58*7c478bd9Sstevel@tonic-gate _elf_nlist(int fd, struct nlist * list)
59*7c478bd9Sstevel@tonic-gate {
60*7c478bd9Sstevel@tonic-gate Elf *elfdes; /* ELF descriptor */
61*7c478bd9Sstevel@tonic-gate GElf_Ehdr ehdr; /* ELF Ehdr */
62*7c478bd9Sstevel@tonic-gate GElf_Shdr s_buf; /* buffer storing section header */
63*7c478bd9Sstevel@tonic-gate Elf_Data *symdata; /* buffer points to symbol table */
64*7c478bd9Sstevel@tonic-gate Elf_Scn *secidx = 0; /* index of the section header table */
65*7c478bd9Sstevel@tonic-gate GElf_Sym sym; /* buffer storing one symbol information */
66*7c478bd9Sstevel@tonic-gate unsigned strtab; /* index of symbol name in string table */
67*7c478bd9Sstevel@tonic-gate long count; /* number of symbols */
68*7c478bd9Sstevel@tonic-gate long ii; /* loop control */
69*7c478bd9Sstevel@tonic-gate
70*7c478bd9Sstevel@tonic-gate if (elf_version(EV_CURRENT) == EV_NONE) {
71*7c478bd9Sstevel@tonic-gate (void) close(fd);
72*7c478bd9Sstevel@tonic-gate return (-1);
73*7c478bd9Sstevel@tonic-gate }
74*7c478bd9Sstevel@tonic-gate elfdes = elf_begin(fd, ELF_C_READ, (Elf *)0);
75*7c478bd9Sstevel@tonic-gate if (gelf_getehdr(elfdes, &ehdr) == 0)
76*7c478bd9Sstevel@tonic-gate return (end_elf_job(fd, elfdes));
77*7c478bd9Sstevel@tonic-gate
78*7c478bd9Sstevel@tonic-gate while ((secidx = elf_nextscn(elfdes, secidx)) != 0) {
79*7c478bd9Sstevel@tonic-gate if ((gelf_getshdr(secidx, &s_buf)) == 0)
80*7c478bd9Sstevel@tonic-gate return (end_elf_job(fd, elfdes));
81*7c478bd9Sstevel@tonic-gate if (s_buf.sh_type != SHT_SYMTAB) /* not symbol table */
82*7c478bd9Sstevel@tonic-gate continue;
83*7c478bd9Sstevel@tonic-gate symdata = elf_getdata(secidx, (Elf_Data *)0);
84*7c478bd9Sstevel@tonic-gate if (symdata == 0)
85*7c478bd9Sstevel@tonic-gate return (end_elf_job(fd, elfdes));
86*7c478bd9Sstevel@tonic-gate if (symdata->d_size == 0)
87*7c478bd9Sstevel@tonic-gate break;
88*7c478bd9Sstevel@tonic-gate strtab = s_buf.sh_link;
89*7c478bd9Sstevel@tonic-gate count = symdata->d_size / s_buf.sh_entsize;
90*7c478bd9Sstevel@tonic-gate for (ii = 1; ii < count; ++ii) {
91*7c478bd9Sstevel@tonic-gate struct nlist *p;
92*7c478bd9Sstevel@tonic-gate register char *name;
93*7c478bd9Sstevel@tonic-gate /* LINTED */
94*7c478bd9Sstevel@tonic-gate (void) gelf_getsym(symdata, (int)ii, &sym);
95*7c478bd9Sstevel@tonic-gate name = elf_strptr(elfdes, strtab, (size_t)sym.st_name);
96*7c478bd9Sstevel@tonic-gate if (name == 0)
97*7c478bd9Sstevel@tonic-gate continue;
98*7c478bd9Sstevel@tonic-gate for (p = list; p->n_name && p->n_name[0]; ++p) {
99*7c478bd9Sstevel@tonic-gate if (strcmp(p->n_name, name))
100*7c478bd9Sstevel@tonic-gate continue;
101*7c478bd9Sstevel@tonic-gate p->n_value = (long)sym.st_value;
102*7c478bd9Sstevel@tonic-gate p->n_type = GELF_ST_TYPE(sym.st_info);
103*7c478bd9Sstevel@tonic-gate p->n_scnum = sym.st_shndx;
104*7c478bd9Sstevel@tonic-gate break;
105*7c478bd9Sstevel@tonic-gate }
106*7c478bd9Sstevel@tonic-gate }
107*7c478bd9Sstevel@tonic-gate break;
108*7c478bd9Sstevel@tonic-gate /*
109*7c478bd9Sstevel@tonic-gate * Currently there is only one symbol table section
110*7c478bd9Sstevel@tonic-gate * in an object file, but this restriction may be
111*7c478bd9Sstevel@tonic-gate * relaxed in the future.
112*7c478bd9Sstevel@tonic-gate */
113*7c478bd9Sstevel@tonic-gate }
114*7c478bd9Sstevel@tonic-gate (void) elf_end(elfdes);
115*7c478bd9Sstevel@tonic-gate (void) close(fd);
116*7c478bd9Sstevel@tonic-gate return (0);
117*7c478bd9Sstevel@tonic-gate }
118*7c478bd9Sstevel@tonic-gate
119*7c478bd9Sstevel@tonic-gate int
nlist(const char * name,struct nlist * list)120*7c478bd9Sstevel@tonic-gate nlist(const char * name, struct nlist * list)
121*7c478bd9Sstevel@tonic-gate {
122*7c478bd9Sstevel@tonic-gate register struct nlist *p;
123*7c478bd9Sstevel@tonic-gate char magic_buf[EI_NIDENT];
124*7c478bd9Sstevel@tonic-gate int fd;
125*7c478bd9Sstevel@tonic-gate
126*7c478bd9Sstevel@tonic-gate for (p = list; p->n_name && p->n_name[0]; p++) { /* n_name can be ptr */
127*7c478bd9Sstevel@tonic-gate p->n_type = 0;
128*7c478bd9Sstevel@tonic-gate p->n_value = 0L;
129*7c478bd9Sstevel@tonic-gate p->n_scnum = 0;
130*7c478bd9Sstevel@tonic-gate p->n_sclass = 0;
131*7c478bd9Sstevel@tonic-gate p->n_numaux = 0;
132*7c478bd9Sstevel@tonic-gate }
133*7c478bd9Sstevel@tonic-gate
134*7c478bd9Sstevel@tonic-gate if ((fd = open(name, 0)) < 0)
135*7c478bd9Sstevel@tonic-gate return (-1);
136*7c478bd9Sstevel@tonic-gate if (read(fd, magic_buf, EI_NIDENT) == -1) {
137*7c478bd9Sstevel@tonic-gate (void) close(fd);
138*7c478bd9Sstevel@tonic-gate return (-1);
139*7c478bd9Sstevel@tonic-gate }
140*7c478bd9Sstevel@tonic-gate
141*7c478bd9Sstevel@tonic-gate if (lseek(fd, 0L, 0) == -1L) { /* rewind to beginning of object file */
142*7c478bd9Sstevel@tonic-gate (void) close(fd);
143*7c478bd9Sstevel@tonic-gate return (-1);
144*7c478bd9Sstevel@tonic-gate }
145*7c478bd9Sstevel@tonic-gate
146*7c478bd9Sstevel@tonic-gate #ifndef _LP64
147*7c478bd9Sstevel@tonic-gate if (ISELF && (magic_buf[EI_CLASS] == ELFCLASS32))
148*7c478bd9Sstevel@tonic-gate #else
149*7c478bd9Sstevel@tonic-gate if (ISELF) /* 64-bit case handles both Elf32 and Elf64 */
150*7c478bd9Sstevel@tonic-gate #endif
151*7c478bd9Sstevel@tonic-gate return (_elf_nlist(fd, list));
152*7c478bd9Sstevel@tonic-gate else {
153*7c478bd9Sstevel@tonic-gate (void) close(fd);
154*7c478bd9Sstevel@tonic-gate return (-1);
155*7c478bd9Sstevel@tonic-gate }
156*7c478bd9Sstevel@tonic-gate }
157