]> sbz's 6dev Repos - elfdbg/.git/blame - elfdbg.c
Add tests cases for expected output
[elfdbg/.git] / elfdbg.c
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1/*-
2 * Copyright (c) 2015 Sofian Brabez <sbz@FreeBSD.org>
3 * All rights reserved.
3131de8b 4 *
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5 * Redistribution and use in source and binary forms, with or without
6 * modification, are permitted provided that the following conditions
7 * are met:
8 * 1. Redistributions of source code must retain the above copyright
9 * notice, this list of conditions and the following disclaimer
10 * in this position and unchanged.
11 * 2. Redistributions in binary form must reproduce the above copyright
12 * notice, this list of conditions and the following disclaimer in the
13 * documentation and/or other materials provided with the distribution.
3131de8b 14 *
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15 * THIS SOFTWARE IS PROVIDED BY THE AUTHOR(S) ``AS IS'' AND ANY EXPRESS OR
16 * IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED WARRANTIES
17 * OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE DISCLAIMED.
18 * IN NO EVENT SHALL THE AUTHOR(S) BE LIABLE FOR ANY DIRECT, INDIRECT,
19 * INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT
20 * NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE,
21 * DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY
22 * THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT
23 * (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE OF
24 * THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
25 */
26#include <err.h>
27#include <fcntl.h>
28#include <gelf.h>
29#include <stdint.h>
30#include <string.h>
31#include <stdio.h>
32#include <stdlib.h>
33#include <sysexits.h>
34#include <unistd.h>
35
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36extern char *__progname;
37
f4b470b9 38static int
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39elf_debug_sections(Elf *e)
40{
41 Elf_Scn *scn = NULL;
42 GElf_Shdr shdr;
43 size_t n, shstrndx, sz;
44 char *name;
45 int has_debug = 0;
f4b470b9 46
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47 if (elf_getshdrstrndx(e, &shstrndx) != 0)
48 errx(EX_SOFTWARE, "elf_getshdrstrndx() failed : %s . ",
49 elf_errmsg(-1));
f4b470b9 50
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51 while ((scn = elf_nextscn(e, scn)) != NULL) {
52 gelf_getshdr(scn, &shdr);
f4b470b9 53
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54 name = elf_strptr(e, shstrndx, shdr.sh_name);
55 if (!strstr(name, "debug_"))
56 continue;
f4b470b9 57
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58 has_debug++;
59 }
f4b470b9 60
3131de8b 61 return (has_debug > 0);
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62}
63
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64static void
65usage(void) {
66 fprintf(stderr, "Usage: %s file\n", __progname);
67 exit(EX_USAGE);
68}
69
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70int
71main(int argc, char *argv[])
72{
ef31b1d0 73 const char *filename;
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74 int fd, rc;
75 Elf *e;
76 int has_debug;
f4b470b9 77
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78 if (argc == 1)
79 usage();
80
81 filename = argv[1];
82
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83 if (elf_version(EV_CURRENT) == EV_NONE)
84 errx(EX_SOFTWARE, "ELF library initialization failed : %s ",
85 elf_errmsg(-1));
f4b470b9 86
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87 if ((fd = open(filename, O_RDONLY, 0)) < 0)
88 err(EX_NOINPUT, "open %s failed ", filename);
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89 if ((e = elf_begin(fd, ELF_C_READ, NULL)) == NULL)
90 errx(EX_SOFTWARE, "elf_begin() failed : %s", elf_errmsg(-1));
91 if (elf_kind(e) != ELF_K_ELF)
ef31b1d0 92 errx(EX_DATAERR, "%s is not an ELF object", filename);
f4b470b9 93
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94 has_debug = elf_debug_sections(e);
95 printf(has_debug ? "HAS DEBUG\n" : "NO DEBUG\n");
f4b470b9 96
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97 rc = close(fd);
98 rc = elf_end(e);
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99
100 return (rc);
101}