1 /* Copyright (C) 2002, 2005 Red Hat, Inc.
2 This file is part of Red Hat elfutils.
3 Written by Ulrich Drepper <drepper@redhat.com>, 2002.
4
5 Red Hat elfutils is free software; you can redistribute it and/or modify
6 it under the terms of the GNU General Public License as published by the
7 Free Software Foundation; version 2 of the License.
8
9 Red Hat elfutils is distributed in the hope that it will be useful, but
10 WITHOUT ANY WARRANTY; without even the implied warranty of
11 MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
12 General Public License for more details.
13
14 You should have received a copy of the GNU General Public License along
15 with Red Hat elfutils; if not, write to the Free Software Foundation,
16 Inc., 51 Franklin Street, Fifth Floor, Boston MA 02110-1301 USA.
17
18 Red Hat elfutils is an included package of the Open Invention Network.
19 An included package of the Open Invention Network is a package for which
20 Open Invention Network licensees cross-license their patents. No patent
21 license is granted, either expressly or impliedly, by designation as an
22 included package. Should you wish to participate in the Open Invention
23 Network licensing program, please visit www.openinventionnetwork.com
24 <http://www.openinventionnetwork.com>. */
25
26 #ifdef HAVE_CONFIG_H
27 # include <config.h>
28 #endif
29
30 #include <fcntl.h>
31 #include <inttypes.h>
32 #include ELFUTILS_HEADER(asm)
33 #include <libelf.h>
34 #include <stdio.h>
35 #include <unistd.h>
36
37
38 static const char fname[] = "asm-tst8-out.o";
39
40
41 int
main(void)42 main (void)
43 {
44 int result = 0;
45 size_t cnt;
46 AsmCtx_t *ctx;
47 Elf *elf;
48 int fd;
49
50 elf_version (EV_CURRENT);
51
52 Ebl *ebl = ebl_openbackend_machine (EM_386);
53 if (ebl == NULL)
54 {
55 puts ("cannot open backend library");
56 return 1;
57 }
58
59 ctx = asm_begin (fname, ebl, false);
60 if (ctx == NULL)
61 {
62 printf ("cannot create assembler context: %s\n", asm_errmsg (-1));
63 return 1;
64 }
65
66 if (asm_newabssym (ctx, "tst8-out.s", 4, 0xfeedbeef, STT_FILE, STB_LOCAL)
67 == NULL)
68 {
69 printf ("cannot create absolute symbol: %s\n", asm_errmsg (-1));
70 asm_abort (ctx);
71 return 1;
72 }
73
74 /* Create the output file. */
75 if (asm_end (ctx) != 0)
76 {
77 printf ("cannot create output file: %s\n", asm_errmsg (-1));
78 asm_abort (ctx);
79 return 1;
80 }
81
82 /* Check the file. */
83 fd = open (fname, O_RDONLY);
84 if (fd == -1)
85 {
86 printf ("cannot open generated file: %m\n");
87 result = 1;
88 goto out;
89 }
90
91 elf = elf_begin (fd, ELF_C_READ, NULL);
92 if (elf == NULL)
93 {
94 printf ("cannot create ELF descriptor: %s\n", elf_errmsg (-1));
95 result = 1;
96 goto out_close;
97 }
98 if (elf_kind (elf) != ELF_K_ELF)
99 {
100 puts ("not a valid ELF file");
101 result = 1;
102 goto out_close2;
103 }
104
105 for (cnt = 1; 1; ++cnt)
106 {
107 Elf_Scn *scn;
108 GElf_Shdr shdr_mem;
109 GElf_Shdr *shdr;
110
111 scn = elf_getscn (elf, cnt);
112 if (scn == NULL)
113 {
114 printf ("cannot get section %Zd: %s\n", cnt, elf_errmsg (-1));
115 result = 1;
116 continue;
117 }
118
119 shdr = gelf_getshdr (scn, &shdr_mem);
120 if (shdr == NULL)
121 {
122 printf ("cannot get section header for section %Zd: %s\n",
123 cnt, elf_errmsg (-1));
124 result = 1;
125 continue;
126 }
127 /* We are looking for the symbol table. */
128 if (shdr->sh_type != SHT_SYMTAB)
129 continue;
130
131 for (cnt = 1; cnt< (shdr->sh_size
132 / gelf_fsize (elf, ELF_T_SYM, 1, EV_CURRENT));
133 ++cnt)
134 {
135 GElf_Sym sym_mem;
136 GElf_Sym *sym;
137
138 if (cnt > 1)
139 {
140 puts ("too many symbol");
141 result = 1;
142 break;
143 }
144
145 sym = gelf_getsym (elf_getdata (scn, NULL), cnt, &sym_mem);
146 if (sym == NULL)
147 {
148 printf ("cannot get symbol %zu: %s\n", cnt, elf_errmsg (-1));
149 result = 1;
150 }
151 else
152 {
153 if (sym->st_shndx != SHN_ABS)
154 {
155 printf ("expected common symbol, got section %u\n",
156 (unsigned int) sym->st_shndx);
157 result = 1;
158 }
159
160 if (sym->st_value != 0xfeedbeef)
161 {
162 printf ("requested value 0xfeedbeef, is %#" PRIxMAX "\n",
163 (uintmax_t) sym->st_value);
164 result = 1;
165 }
166
167 if (sym->st_size != 4)
168 {
169 printf ("requested size 4, is %" PRIuMAX "\n",
170 (uintmax_t) sym->st_value);
171 result = 1;
172 }
173
174 if (GELF_ST_TYPE (sym->st_info) != STT_FILE)
175 {
176 printf ("requested type FILE, is %u\n",
177 (unsigned int) GELF_ST_TYPE (sym->st_info));
178 result = 1;
179 }
180 }
181 }
182
183 break;
184 }
185
186 out_close2:
187 elf_end (elf);
188 out_close:
189 close (fd);
190 out:
191 /* We don't need the file anymore. */
192 unlink (fname);
193
194 ebl_closebackend (ebl);
195
196 return result;
197 }
198