/* 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 ELFUTILS_HEADER(ebl)

#include ELFUTILS_HEADER(asm)

#include <libelf.h>

#include <stdio.h>

#include <string.h>

#include <unistd.h>

static const char fname[] = "asm-tst2-out.o";

static const GElf_Ehdr expected_ehdr =

  {

    .e_ident = { [EI_MAG0] = ELFMAG0,

		 [EI_MAG1] = ELFMAG1,

		 [EI_MAG2] = ELFMAG2,

		 [EI_MAG3] = ELFMAG3,

		 [EI_CLASS] = ELFCLASS32,

		 [EI_DATA] = ELFDATA2LSB,

		 [EI_VERSION] = EV_CURRENT },

    .e_type = ET_REL,

    .e_machine = EM_386,

    .e_version = EV_CURRENT,

    .e_shoff = 96,

    .e_ehsize = sizeof (Elf32_Ehdr),

    .e_shentsize = sizeof (Elf32_Shdr),

    .e_shnum = 3,

    .e_shstrndx = 2

  };

static const char *scnnames[3] =

  {

    [0] = "",

    [1] = ".data",

    [2] = ".shstrtab"

  };

int

main (void)

{

  AsmCtx_t *ctx;

  AsmScn_t *scn1;

  AsmScn_t *scn2;

  int result = 0;

  int fd;

  Elf *elf;

  GElf_Ehdr ehdr_mem;

  GElf_Ehdr *ehdr;

  size_t cnt;

  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;

    }

  /* Create two sections.  */

  scn1 = asm_newscn (ctx, ".data", SHT_PROGBITS, SHF_ALLOC | SHF_WRITE);

  scn2 = asm_newsubscn (scn1, 1);

  if (scn1 == NULL || scn2 == NULL)

    {

      printf ("cannot create section in output file: %s\n", asm_errmsg (-1));

      asm_abort (ctx);

      return 1;

    }

  /* Special alignment for the .text section.  */

  if (asm_align (scn1, 16) != 0)

    {

      printf ("cannot align .text section: %s\n", asm_errmsg (-1));

      result = 1;

    }

  /* Add a few strings.  */

  if (asm_addstrz (scn1, "one", 4) != 0)

    {

      printf ("cannot insert first string: %s\n", asm_errmsg (-1));

      result = 1;

    }

  if (asm_addstrz (scn2, "three", 0) != 0)

    {

      printf ("cannot insert second string: %s\n", asm_errmsg (-1));

      result = 1;

    }

  if (asm_addstrz (scn1, "two", 4) != 0)

    {

      printf ("cannot insert third string: %s\n", asm_errmsg (-1));

      result = 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;

    }

  ehdr = gelf_getehdr (elf, &ehdr_mem);

  if (ehdr == NULL)

    {

      printf ("cannot get ELF header: %s\n", elf_errmsg (-1));

      result = 1;

      goto out_close2;

    }

  if (memcmp (ehdr, &expected_ehdr, sizeof (GElf_Ehdr)) != 0)

    {

      puts ("ELF header does not match");

      result = 1;

      goto out_close2;

    }

  for (cnt = 1; cnt < 3; ++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;

	}

      if (strcmp (elf_strptr (elf, ehdr->e_shstrndx, shdr->sh_name),

		  scnnames[cnt]) != 0)

	{

	  printf ("section %zd's name differs: %s vs %s\n", cnt,

		  elf_strptr (elf, ehdr->e_shstrndx, shdr->sh_name),

		  scnnames[cnt]);

	  result = 1;

	}

      if (shdr->sh_type != (cnt == 2 ? SHT_STRTAB : SHT_PROGBITS))

	{

	  printf ("section %zd's type differs\n", cnt);

	  result = 1;

	}

      if ((cnt == 1 && shdr->sh_flags != (SHF_ALLOC | SHF_WRITE))

	  || (cnt == 2 && shdr->sh_flags != 0))

	{

	  printf ("section %zd's flags differs\n", cnt);

	  result = 1;

	}

      if (shdr->sh_addr != 0)

	{

	  printf ("section %zd's address differs\n", cnt);

	  result = 1;

	}

      if ((cnt == 1 && shdr->sh_offset != ((sizeof (Elf32_Ehdr) + 15) & ~15))

	  || (cnt == 2

	      && shdr->sh_offset != (((sizeof (Elf32_Ehdr) + 15) & ~15)

				     + strlen ("one") + 1

				     + strlen ("two") + 1

				     + strlen ("three") + 1)))

	{

	  printf ("section %zd's offset differs\n", cnt);

	  result = 1;

	}

      if ((cnt == 1 && shdr->sh_size != (strlen ("one") + 1

					 + strlen ("two") + 1

					 + strlen ("three") + 1))

	  || (cnt == 2 && shdr->sh_size != 17))

	{

	  printf ("section %zd's size differs\n", cnt);

	  result = 1;

	}

      if (shdr->sh_link != 0)

	{

	  printf ("section %zd's link differs\n", cnt);

	  result = 1;

	}

      if (shdr->sh_info != 0)

	{

	  printf ("section %zd's info differs\n", cnt);

	  result = 1;

	}

      if ((cnt == 1 && shdr->sh_addralign != 16)

	  || (cnt != 1 && shdr->sh_addralign != 1))

	{

	  printf ("section %zd's addralign differs\n", cnt);

	  result = 1;

	}

      if (shdr->sh_entsize != 0)

	{

	  printf ("section %zd's entsize differs\n", cnt);

	  result = 1;

	}

    }

 out_close2:

  elf_end (elf);

 out_close:

  close (fd);

 out:

  /* We don't need the file anymore.  */

  unlink (fname);

  ebl_closebackend (ebl);

  return result;

}