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
38static const char fname[] = "asm-tst7-out.o";
39
40
41int
42main (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_newcomsym (ctx, "commsym", 4, 16) == NULL)
67    {
68      printf ("cannot create common symbol: %s\n", asm_errmsg (-1));
69      asm_abort (ctx);
70      return 1;
71    }
72
73  /* Create the output file.  */
74  if (asm_end (ctx) != 0)
75    {
76      printf ("cannot create output file: %s\n", asm_errmsg (-1));
77      asm_abort (ctx);
78      return 1;
79    }
80
81  /* Check the file.  */
82  fd = open (fname, O_RDONLY);
83  if (fd == -1)
84    {
85      printf ("cannot open generated file: %m\n");
86      result = 1;
87      goto out;
88    }
89
90  elf = elf_begin (fd, ELF_C_READ, NULL);
91  if (elf == NULL)
92    {
93      printf ("cannot create ELF descriptor: %s\n", elf_errmsg (-1));
94      result = 1;
95      goto out_close;
96    }
97  if (elf_kind (elf) != ELF_K_ELF)
98    {
99      puts ("not a valid ELF file");
100      result = 1;
101      goto out_close2;
102    }
103
104  for (cnt = 1; 1; ++cnt)
105    {
106      Elf_Scn *scn;
107      GElf_Shdr shdr_mem;
108      GElf_Shdr *shdr;
109
110      scn = elf_getscn (elf, cnt);
111      if (scn == NULL)
112	{
113	  printf ("cannot get section %Zd: %s\n", cnt, elf_errmsg (-1));
114	  result = 1;
115	  continue;
116	}
117
118      shdr = gelf_getshdr (scn, &shdr_mem);
119      if (shdr == NULL)
120	{
121	  printf ("cannot get section header for section %Zd: %s\n",
122		  cnt, elf_errmsg (-1));
123	  result = 1;
124	  continue;
125	}
126      /* We are looking for the symbol table.  */
127      if (shdr->sh_type != SHT_SYMTAB)
128	continue;
129
130      for (cnt = 1; cnt< (shdr->sh_size
131			  / gelf_fsize (elf, ELF_T_SYM, 1, EV_CURRENT));
132	   ++cnt)
133	{
134	  GElf_Sym sym_mem;
135	  GElf_Sym *sym;
136
137	  if (cnt > 1)
138	    {
139	      puts ("too many symbol");
140	      result = 1;
141	      break;
142	    }
143
144	  sym = gelf_getsym (elf_getdata (scn, NULL), cnt, &sym_mem);
145	  if (sym == NULL)
146	    {
147	      printf ("cannot get symbol %zu: %s\n", cnt, elf_errmsg (-1));
148	      result = 1;
149	    }
150	  else
151	    {
152	      if (sym->st_shndx != SHN_COMMON)
153		{
154		  printf ("expected common symbol, got section %u\n",
155			  (unsigned int) sym->st_shndx);
156		  result = 1;
157		}
158
159	      if (sym->st_value != 16)
160		{
161		  printf ("requested alignment 16, is %" PRIuMAX "\n",
162			  (uintmax_t) sym->st_value);
163		  result = 1;
164		}
165
166	      if (sym->st_size != 4)
167		{
168		  printf ("requested size 4, is %" PRIuMAX "\n",
169			  (uintmax_t) sym->st_value);
170		  result = 1;
171		}
172	    }
173	}
174
175      break;
176    }
177
178 out_close2:
179  elf_end (elf);
180 out_close:
181  close (fd);
182 out:
183  /* We don't need the file anymore.  */
184  unlink (fname);
185
186  ebl_closebackend (ebl);
187
188  return result;
189}
190