/* Copyright (C) 1998-2002, 2004, 2006, 2012, 2015 Red Hat, Inc.

   This file is part of elfutils.

   Written by Ulrich Drepper <drepper@redhat.com>, 1998.

   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/>.  */

#include <config.h>

#include <dwarf.h>

#include <inttypes.h>

#include <libelf.h>

#include ELFUTILS_HEADER(dw)

#include <fcntl.h>

#include <stdio.h>

#include <string.h>

#include <unistd.h>

#include "../libdw/known-dwarf.h"

static const char *

dwarf_tag_string (unsigned int tag)

{

  switch (tag)

    {

#define DWARF_ONE_KNOWN_DW_TAG(NAME, CODE) case CODE: return #NAME;

      DWARF_ALL_KNOWN_DW_TAG

#undef DWARF_ONE_KNOWN_DW_TAG

    default:

      return NULL;

    }

}

static const char *

dwarf_attr_string (unsigned int attrnum)

{

  switch (attrnum)

    {

#define DWARF_ONE_KNOWN_DW_AT(NAME, CODE) case CODE: return #NAME;

      DWARF_ALL_KNOWN_DW_AT

#undef DWARF_ONE_KNOWN_DW_AT

    default:

      return NULL;

    }

}

void

handle (Dwarf *dbg, Dwarf_Die *die, int n)

{

  Dwarf_Die child;

  unsigned int tag;

  const char *str;

  char buf[30];

  const char *name;

  Dwarf_Off off;

  Dwarf_Off cuoff;

  size_t cnt;

  Dwarf_Addr addr;

  int i;

  tag = dwarf_tag (die);

  if (tag != DW_TAG_invalid)

    {

      str = dwarf_tag_string (tag);

      if (str == NULL)

	{

	  snprintf (buf, sizeof buf, "%#x", tag);

	  str = buf;

	}

    }

  else

    str = "* NO TAG *";

  name = dwarf_diename (die);

  if (name == 0)

    name = "* NO NAME *";

  off = dwarf_dieoffset (die);

  cuoff = dwarf_cuoffset (die);

  printf ("%*sDW_TAG_%s\n", n * 5, "", str);

  printf ("%*s Name      : %s\n", n * 5, "", name);

  printf ("%*s Offset    : %lld\n", n * 5, "", (long long int) off);

  printf ("%*s CU offset : %lld\n", n * 5, "", (long long int) cuoff);

  printf ("%*s Attrs     :", n * 5, "");

  for (cnt = 0; cnt < 0xffff; ++cnt)

    if (dwarf_hasattr (die, cnt))

      printf (" %s", dwarf_attr_string (cnt));

  puts ("");

  if (dwarf_hasattr (die, DW_AT_low_pc) && dwarf_lowpc (die, &addr) == 0)

    {

      Dwarf_Attribute attr;

      Dwarf_Addr addr2;

      printf ("%*s low PC    : %#llx\n",

	      n * 5, "", (unsigned long long int) addr);

      if (dwarf_attr (die, DW_AT_low_pc, &attr) == NULL

	  || dwarf_formaddr (&attr, &addr2) != 0

	  || addr != addr2)

	puts ("************* DW_AT_low_pc verify failed ************");

      else if (! dwarf_hasform (&attr, DW_FORM_addr))

	puts ("************* DW_AT_low_pc form failed ************");

      else if (dwarf_whatform (&attr) != DW_FORM_addr)

	puts ("************* DW_AT_low_pc form (2) failed ************");

      else if (dwarf_whatattr (&attr) != DW_AT_low_pc)

	puts ("************* DW_AT_low_pc attr failed ************");

    }

  if (dwarf_hasattr (die, DW_AT_high_pc) && dwarf_highpc (die, &addr) == 0)

    {

      Dwarf_Attribute attr;

      Dwarf_Addr addr2;

      printf ("%*s high PC   : %#llx\n",

	      n * 5, "", (unsigned long long int) addr);

      if (dwarf_attr (die, DW_AT_high_pc, &attr) == NULL

	  || dwarf_formaddr (&attr, &addr2) != 0

	  || addr != addr2)

	puts ("************* DW_AT_high_pc verify failed ************");

      else if (! dwarf_hasform (&attr, DW_FORM_addr))

	puts ("************* DW_AT_high_pc form failed ************");

      else if (dwarf_whatform (&attr) != DW_FORM_addr)

	puts ("************* DW_AT_high_pc form (2) failed ************");

      else if (dwarf_whatattr (&attr) != DW_AT_high_pc)

	puts ("************* DW_AT_high_pc attr failed ************");

    }

  if (dwarf_hasattr (die, DW_AT_byte_size) && (i = dwarf_bytesize (die)) != -1)

    {

      Dwarf_Attribute attr;

      Dwarf_Word u2;

      unsigned int u;

      printf ("%*s byte size : %d\n", n * 5, "", i);

      if (dwarf_attr (die, DW_AT_byte_size, &attr) == NULL

	  || dwarf_formudata (&attr, &u2) != 0

	  || i != (int) u2)

	puts ("************* DW_AT_byte_size verify failed ************");

      else if (! dwarf_hasform (&attr, DW_FORM_data1)

	       && ! dwarf_hasform (&attr, DW_FORM_data2)

	       && ! dwarf_hasform (&attr, DW_FORM_data4)

	       && ! dwarf_hasform (&attr, DW_FORM_data8)

	       && ! dwarf_hasform (&attr, DW_FORM_sdata)

	       && ! dwarf_hasform (&attr, DW_FORM_udata))

	puts ("************* DW_AT_byte_size form failed ************");

      else if ((u = dwarf_whatform (&attr)) == 0

	       || (u != DW_FORM_data1

		   && u != DW_FORM_data2

		   && u != DW_FORM_data4

		   && u != DW_FORM_data8

		   && u != DW_FORM_sdata

		   && u != DW_FORM_udata))

	puts ("************* DW_AT_byte_size form (2) failed ************");

      else if (dwarf_whatattr (&attr) != DW_AT_byte_size)

	puts ("************* DW_AT_byte_size attr failed ************");

    }

  if (dwarf_hasattr (die, DW_AT_bit_size) && (i = dwarf_bitsize (die)) != -1)

    {

      Dwarf_Attribute attr;

      Dwarf_Word u2;

      unsigned int u;

      printf ("%*s bit size  : %d\n", n * 5, "", i);

      if (dwarf_attr (die, DW_AT_bit_size, &attr) == NULL

	  || dwarf_formudata (&attr, &u2) != 0

	  || i != (int) u2)

	puts ("************* DW_AT_bit_size test failed ************");

      else if (! dwarf_hasform (&attr, DW_FORM_data1)

	       && ! dwarf_hasform (&attr, DW_FORM_data2)

	       && ! dwarf_hasform (&attr, DW_FORM_data4)

	       && ! dwarf_hasform (&attr, DW_FORM_data8)

	       && ! dwarf_hasform (&attr, DW_FORM_sdata)

	       && ! dwarf_hasform (&attr, DW_FORM_udata))

	puts ("************* DW_AT_bit_size form failed ************");

      else if ((u = dwarf_whatform (&attr)) == 0

	       || (u != DW_FORM_data1

		   && u != DW_FORM_data2

		   && u != DW_FORM_data4

		   && u != DW_FORM_data8

		   && u != DW_FORM_sdata

		   && u != DW_FORM_udata))

	puts ("************* DW_AT_bit_size form (2) failed ************");

      else if (dwarf_whatattr (&attr) != DW_AT_bit_size)

	puts ("************* DW_AT_bit_size attr failed ************");

    }

  if (dwarf_hasattr (die, DW_AT_bit_offset)

      && (i = dwarf_bitoffset (die)) != -1)

    {

      Dwarf_Attribute attr;

      Dwarf_Word u2;

      unsigned int u;

      printf ("%*s bit offset: %d\n", n * 5, "", i);

      if (dwarf_attr (die, DW_AT_bit_offset, &attr) == NULL

	  || dwarf_formudata (&attr, &u2) != 0

	  || i != (int) u2)

	puts ("************* DW_AT_bit_offset test failed ************");

      else if (! dwarf_hasform (&attr, DW_FORM_data1)

	       && ! dwarf_hasform (&attr, DW_FORM_data2)

	       && ! dwarf_hasform (&attr, DW_FORM_data4)

	       && ! dwarf_hasform (&attr, DW_FORM_data8)

	       && ! dwarf_hasform (&attr, DW_FORM_sdata)

	       && ! dwarf_hasform (&attr, DW_FORM_udata))

	puts ("************* DW_AT_bit_offset form failed ************");

      else if ((u = dwarf_whatform (&attr)) == 0

	       || (u != DW_FORM_data1

		   && u != DW_FORM_data2

		   && u != DW_FORM_data4

		   && u != DW_FORM_data8

		   && u != DW_FORM_sdata

		   && u != DW_FORM_udata))

	puts ("************* DW_AT_bit_offset form (2) failed ************");

      else if (dwarf_whatattr (&attr) != DW_AT_bit_offset)

	puts ("************* DW_AT_bit_offset attr failed ************");

    }

  if (dwarf_hasattr (die, DW_AT_language) && (i = dwarf_srclang (die)) != -1)

    {

      Dwarf_Attribute attr;

      Dwarf_Word u2;

      unsigned int u;

      printf ("%*s language  : %d\n", n * 5, "", i);

      if (dwarf_attr (die, DW_AT_language, &attr) == NULL

	  || dwarf_formudata (&attr, &u2) != 0

	  || i != (int) u2)

	puts ("************* DW_AT_language test failed ************");

      else if (! dwarf_hasform (&attr, DW_FORM_data1)

	       && ! dwarf_hasform (&attr, DW_FORM_data2)

	       && ! dwarf_hasform (&attr, DW_FORM_data4)

	       && ! dwarf_hasform (&attr, DW_FORM_data8)

	       && ! dwarf_hasform (&attr, DW_FORM_sdata)

	       && ! dwarf_hasform (&attr, DW_FORM_udata))

	puts ("************* DW_AT_language form failed ************");

      else if ((u = dwarf_whatform (&attr)) == 0

	       || (u != DW_FORM_data1

		   && u != DW_FORM_data2

		   && u != DW_FORM_data4

		   && u != DW_FORM_data8

		   && u != DW_FORM_sdata

		   && u != DW_FORM_udata))

	puts ("************* DW_AT_language form (2) failed ************");

      else if (dwarf_whatattr (&attr) != DW_AT_language)

	puts ("************* DW_AT_language attr failed ************");

    }

  if (dwarf_hasattr (die, DW_AT_ordering)

      && (i = dwarf_arrayorder (die)) != -1)

    {

      Dwarf_Attribute attr;

      Dwarf_Word u2;

      unsigned int u;

      printf ("%*s ordering  : %d\n", n * 5, "", i);

      if (dwarf_attr (die, DW_AT_ordering, &attr) == NULL

	  || dwarf_formudata (&attr, &u2) != 0

	  || i != (int) u2)

	puts ("************* DW_AT_ordering test failed ************");

      else if (! dwarf_hasform (&attr, DW_FORM_data1)

	       && ! dwarf_hasform (&attr, DW_FORM_data2)

	       && ! dwarf_hasform (&attr, DW_FORM_data4)

	       && ! dwarf_hasform (&attr, DW_FORM_data8)

	       && ! dwarf_hasform (&attr, DW_FORM_sdata)

	       && ! dwarf_hasform (&attr, DW_FORM_udata))

	puts ("************* DW_AT_ordering failed ************");

      else if ((u = dwarf_whatform (&attr)) == 0

	       || (u != DW_FORM_data1

		   && u != DW_FORM_data2

		   && u != DW_FORM_data4

		   && u != DW_FORM_data8

		   && u != DW_FORM_sdata

		   && u != DW_FORM_udata))

	puts ("************* DW_AT_ordering form (2) failed ************");

      else if (dwarf_whatattr (&attr) != DW_AT_ordering)

	puts ("************* DW_AT_ordering attr failed ************");

    }

  if (dwarf_hasattr (die, DW_AT_comp_dir))

    {

      Dwarf_Attribute attr;

      if (dwarf_attr (die, DW_AT_comp_dir, &attr) == NULL

	  || (name = dwarf_formstring (&attr)) == NULL)

	puts ("************* DW_AT_comp_dir attr failed ************");

      else

	printf ("%*s directory : %s\n", n * 5, "", name);

    }

  if (dwarf_hasattr (die, DW_AT_producer))

    {

      Dwarf_Attribute attr;

      if (dwarf_attr (die, DW_AT_producer, &attr) == NULL

	  || (name = dwarf_formstring (&attr)) == NULL)

	puts ("************* DW_AT_comp_dir attr failed ************");

      else

	printf ("%*s producer  : %s\n", n * 5, "", name);

    }

  if (dwarf_haschildren (die) != 0 && dwarf_child (die, &child) == 0)

    handle (dbg, &child, n + 1);

  if (dwarf_siblingof (die, die) == 0)

    handle (dbg, die, n);

}

int

main (int argc, char *argv[])

{

 int cnt;

  for (cnt = 1; cnt < argc; ++cnt)

    {

      int fd = open (argv[cnt], O_RDONLY);

      Dwarf *dbg;

      printf ("file: %s\n", basename (argv[cnt]));

      dbg = dwarf_begin (fd, DWARF_C_READ);

      if (dbg == NULL)

	{

	  printf ("%s not usable\n", argv[cnt]);

	  close (fd);

	  continue;

	}

      Dwarf_Off off = 0;

      Dwarf_Off old_off = 0;

      size_t hsize;

      Dwarf_Off abbrev;

      uint8_t addresssize;

      uint8_t offsetsize;

      while (dwarf_nextcu (dbg, off, &off, &hsize, &abbrev, &addresssize,

			   &offsetsize) == 0)

	{

	  printf ("New CU: off = %llu, hsize = %zu, ab = %llu, as = %" PRIu8

		  ", os = %" PRIu8 "\n",

		  (unsigned long long int) old_off, hsize,

		  (unsigned long long int) abbrev, addresssize,

		  offsetsize);

	  Dwarf_Die die;

	  if (dwarf_offdie (dbg, old_off + hsize, &die) != NULL)

	    handle (dbg, &die, 1);

	  old_off = off;

	}

      dwarf_end (dbg);

      close (fd);

    }

  return 0;

}