summaryrefslogtreecommitdiff
path: root/tests/asm-tst7.c
blob: 87c214858a867b13764c7b87aef7106345d23ee8 (plain)
1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
17
18
19
20
21
22
23
24
25
26
27
28
29
30
31
32
33
34
35
36
37
38
39
40
41
42
43
44
45
46
47
48
49
50
51
52
53
54
55
56
57
58
59
60
61
62
63
64
65
66
67
68
69
70
71
72
73
74
75
76
77
78
79
80
81
82
83
84
85
86
87
88
89
90
91
92
93
94
95
96
97
98
99
100
101
102
103
104
105
106
107
108
109
110
111
112
113
114
115
116
117
118
119
120
121
122
123
124
125
126
127
128
129
130
131
132
133
134
135
136
137
138
139
140
141
142
143
144
145
146
147
148
149
150
151
152
153
154
155
156
157
158
159
160
161
162
163
164
165
166
167
168
169
170
171
172
173
174
175
176
177
178
179
180
181
182
/* Copyright (C) 2002, 2005 Red Hat, Inc.
   This file is part of elfutils.
   Written by Ulrich Drepper <drepper@redhat.com>, 2002.

   This file is free software; you can redistribute it and/or modify
   it under the terms of the GNU General Public License as published by
   the Free Software Foundation; either version 3 of the License, or
   (at your option) any later version.

   elfutils is distributed in the hope that it will be useful, but
   WITHOUT ANY WARRANTY; without even the implied warranty of
   MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
   GNU General Public License for more details.

   You should have received a copy of the GNU General Public License
   along with this program.  If not, see <http://www.gnu.org/licenses/>.  */

#ifdef HAVE_CONFIG_H
# include <config.h>
#endif

#include <fcntl.h>
#include <inttypes.h>
#include ELFUTILS_HEADER(asm)
#include ELFUTILS_HEADER(ebl)
#include <libelf.h>
#include <stdio.h>
#include <unistd.h>


static const char fname[] = "asm-tst7-out.o";


int
main (void)
{
  int result = 0;
  size_t cnt;
  AsmCtx_t *ctx;
  Elf *elf;
  int fd;

  elf_version (EV_CURRENT);

  Ebl *ebl = ebl_openbackend_machine (EM_386);
  if (ebl == NULL)
    {
      puts ("cannot open backend library");
      return 1;
    }

  ctx = asm_begin (fname, ebl, false);
  if (ctx == NULL)
    {
      printf ("cannot create assembler context: %s\n", asm_errmsg (-1));
      return 1;
    }

  if (asm_newcomsym (ctx, "commsym", 4, 16) == NULL)
    {
      printf ("cannot create common symbol: %s\n", asm_errmsg (-1));
      asm_abort (ctx);
      return 1;
    }

  /* Create the output file.  */
  if (asm_end (ctx) != 0)
    {
      printf ("cannot create output file: %s\n", asm_errmsg (-1));
      asm_abort (ctx);
      return 1;
    }

  /* Check the file.  */
  fd = open (fname, O_RDONLY);
  if (fd == -1)
    {
      printf ("cannot open generated file: %m\n");
      result = 1;
      goto out;
    }

  elf = elf_begin (fd, ELF_C_READ, NULL);
  if (elf == NULL)
    {
      printf ("cannot create ELF descriptor: %s\n", elf_errmsg (-1));
      result = 1;
      goto out_close;
    }
  if (elf_kind (elf) != ELF_K_ELF)
    {
      puts ("not a valid ELF file");
      result = 1;
      goto out_close2;
    }

  for (cnt = 1; 1; ++cnt)
    {
      Elf_Scn *scn;
      GElf_Shdr shdr_mem;
      GElf_Shdr *shdr;

      scn = elf_getscn (elf, cnt);
      if (scn == NULL)
	{
	  printf ("cannot get section %zd: %s\n", cnt, elf_errmsg (-1));
	  result = 1;
	  continue;
	}

      shdr = gelf_getshdr (scn, &shdr_mem);
      if (shdr == NULL)
	{
	  printf ("cannot get section header for section %zd: %s\n",
		  cnt, elf_errmsg (-1));
	  result = 1;
	  continue;
	}
      /* We are looking for the symbol table.  */
      if (shdr->sh_type != SHT_SYMTAB)
	continue;

      for (cnt = 1; cnt< (shdr->sh_size
			  / gelf_fsize (elf, ELF_T_SYM, 1, EV_CURRENT));
	   ++cnt)
	{
	  GElf_Sym sym_mem;
	  GElf_Sym *sym;

	  if (cnt > 1)
	    {
	      puts ("too many symbol");
	      result = 1;
	      break;
	    }

	  sym = gelf_getsym (elf_getdata (scn, NULL), cnt, &sym_mem);
	  if (sym == NULL)
	    {
	      printf ("cannot get symbol %zu: %s\n", cnt, elf_errmsg (-1));
	      result = 1;
	    }
	  else
	    {
	      if (sym->st_shndx != SHN_COMMON)
		{
		  printf ("expected common symbol, got section %u\n",
			  (unsigned int) sym->st_shndx);
		  result = 1;
		}

	      if (sym->st_value != 16)
		{
		  printf ("requested alignment 16, is %" PRIuMAX "\n",
			  (uintmax_t) sym->st_value);
		  result = 1;
		}

	      if (sym->st_size != 4)
		{
		  printf ("requested size 4, is %" PRIuMAX "\n",
			  (uintmax_t) sym->st_value);
		  result = 1;
		}
	    }
	}

      break;
    }

 out_close2:
  elf_end (elf);
 out_close:
  close (fd);
 out:
  /* We don't need the file anymore.  */
  unlink (fname);

  ebl_closebackend (ebl);

  return result;
}