[thirdparty/glibc.git] / sysdeps / unix / sysv / linux / i386 / readelflib.c

/* Copyright (C) 1999-2018 Free Software Foundation, Inc.
   This file is part of the GNU C Library.
   Contributed by Andreas Jaeger <aj@suse.de>, 1999 and
		  Jakub Jelinek <jakub@redhat.com>, 2000.

   The GNU C Library is free software; you can redistribute it and/or
   modify it under the terms of the GNU Lesser General Public
   License as published by the Free Software Foundation; either
   version 2.1 of the License, or (at your option) any later version.

   The GNU C Library 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
   Lesser General Public License for more details.

   You should have received a copy of the GNU Lesser General Public
   License along with the GNU C Library; if not, see
   <http://www.gnu.org/licenses/>.  */


int process_elf32_file (const char *file_name, const char *lib, int *flag,
			unsigned int *osversion, char **soname,
			void *file_contents, size_t file_length);
int process_elf64_file (const char *file_name, const char *lib, int *flag,
			unsigned int *osversion, char **soname,
			void *file_contents, size_t file_length);

/* Returns 0 if everything is ok, != 0 in case of error.  */
int
process_elf_file (const char *file_name, const char *lib, int *flag,
		  unsigned int *osversion, char **soname, void *file_contents,
		  size_t file_length)
{
  ElfW(Ehdr) *elf_header = (ElfW(Ehdr) *) file_contents;
  int ret, file_flag = 0;

  switch (elf_header->e_machine)
    {
    case EM_X86_64:
      if (elf_header->e_ident[EI_CLASS] == ELFCLASS64)
	/* X86-64 64bit libraries are always libc.so.6+.  */
	file_flag = FLAG_X8664_LIB64|FLAG_ELF_LIBC6;
      else
	/* X32 libraries are always libc.so.6+.  */
	file_flag = FLAG_X8664_LIBX32|FLAG_ELF_LIBC6;
      break;
#ifndef SKIP_EM_IA_64
    case EM_IA_64:
      if (elf_header->e_ident[EI_CLASS] == ELFCLASS64)
	{
	  /* IA64 64bit libraries are always libc.so.6+.  */
	  file_flag = FLAG_IA64_LIB64|FLAG_ELF_LIBC6;
	  break;
	}
      goto failed;
#endif
    case EM_386:
      if (elf_header->e_ident[EI_CLASS] == ELFCLASS32)
	break;
      /* Fall through.  */
    default:
#ifndef SKIP_EM_IA_64
failed:
#endif
      error (0, 0, _("%s is for unknown machine %d.\n"),
	     file_name, elf_header->e_machine);
      return 1;
    }

  if (elf_header->e_ident[EI_CLASS] == ELFCLASS32)
    ret = process_elf32_file (file_name, lib, flag, osversion, soname,
			      file_contents, file_length);
  else
    ret = process_elf64_file (file_name, lib, flag, osversion, soname,
			      file_contents, file_length);

  if (!ret && file_flag)
    *flag = file_flag;

  return ret;
}

#undef __ELF_NATIVE_CLASS
#undef process_elf_file
#define process_elf_file process_elf32_file
#define __ELF_NATIVE_CLASS 32
#include "elf/readelflib.c"

#undef __ELF_NATIVE_CLASS
#undef process_elf_file
#define process_elf_file process_elf64_file
#define __ELF_NATIVE_CLASS 64
#include "elf/readelflib.c"
Commit	Line	Data
688903eb	1	/* Copyright (C) 1999-2018 Free Software Foundation, Inc.
aaca11d8 UD	2	This file is part of the GNU C Library.
	3	Contributed by Andreas Jaeger <aj@suse.de>, 1999 and
	4	Jakub Jelinek <jakub@redhat.com>, 2000.
	5
	6	The GNU C Library is free software; you can redistribute it and/or
41bdb6e2 AJ	7	modify it under the terms of the GNU Lesser General Public
	8	License as published by the Free Software Foundation; either
	9	version 2.1 of the License, or (at your option) any later version.
aaca11d8 UD	10
	11	The GNU C Library is distributed in the hope that it will be useful,
	12	but WITHOUT ANY WARRANTY; without even the implied warranty of
	13	MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
41bdb6e2	14	Lesser General Public License for more details.
aaca11d8	15
41bdb6e2	16	You should have received a copy of the GNU Lesser General Public
59ba27a6 PE	17	License along with the GNU C Library; if not, see
59ba27a6 PE	18	<http://www.gnu.org/licenses/>. */
aaca11d8 UD	19
	20
	21	int process_elf32_file (const char file_name, const char lib, int *flag,
a986484f UD	22	unsigned int osversion, char *soname,
a986484f UD	23	void *file_contents, size_t file_length);
aaca11d8	24	int process_elf64_file (const char file_name, const char lib, int *flag,
a986484f UD	25	unsigned int osversion, char *soname,
a986484f UD	26	void *file_contents, size_t file_length);
aaca11d8 UD	27
	28	/* Returns 0 if everything is ok, != 0 in case of error. */
	29	int
	30	process_elf_file (const char file_name, const char lib, int *flag,
a986484f UD	31	unsigned int osversion, char soname, void file_contents,
a986484f UD	32	size_t file_length)
aaca11d8 UD	33	{
aaca11d8 UD	34	ElfW(Ehdr) elf_header = (ElfW(Ehdr) ) file_contents;
f1a77b01	35	int ret, file_flag = 0;
aaca11d8	36
f1a77b01	37	switch (elf_header->e_machine)
aaca11d8	38	{
f1a77b01 L	39	case EM_X86_64:
	40	if (elf_header->e_ident[EI_CLASS] == ELFCLASS64)
	41	/* X86-64 64bit libraries are always libc.so.6+. */
	42	file_flag = FLAG_X8664_LIB64\|FLAG_ELF_LIBC6;
	43	else
	44	/* X32 libraries are always libc.so.6+. */
	45	file_flag = FLAG_X8664_LIBX32\|FLAG_ELF_LIBC6;
	46	break;
	47	#ifndef SKIP_EM_IA_64
	48	case EM_IA_64:
	49	if (elf_header->e_ident[EI_CLASS] == ELFCLASS64)
aaca11d8	50	{
f1a77b01 L	51	/* IA64 64bit libraries are always libc.so.6+. */
f1a77b01 L	52	file_flag = FLAG_IA64_LIB64\|FLAG_ELF_LIBC6;
aaca11d8	53	break;
aaca11d8	54	}
f1a77b01 L	55	goto failed;
	56	#endif
	57	case EM_386:
	58	if (elf_header->e_ident[EI_CLASS] == ELFCLASS32)
	59	break;
	60	/* Fall through. */
	61	default:
	62	#ifndef SKIP_EM_IA_64
	63	failed:
	64	#endif
	65	error (0, 0, _("%s is for unknown machine %d.\n"),
	66	file_name, elf_header->e_machine);
	67	return 1;
	68	}
aaca11d8	69
f1a77b01 L	70	if (elf_header->e_ident[EI_CLASS] == ELFCLASS32)
	71	ret = process_elf32_file (file_name, lib, flag, osversion, soname,
	72	file_contents, file_length);
	73	else
	74	ret = process_elf64_file (file_name, lib, flag, osversion, soname,
	75	file_contents, file_length);
aaca11d8	76
f1a77b01 L	77	if (!ret && file_flag)
	78	*flag = file_flag;
	79
	80	return ret;
aaca11d8 UD	81	}
	82
	83	#undef __ELF_NATIVE_CLASS
	84	#undef process_elf_file
	85	#define process_elf_file process_elf32_file
	86	#define __ELF_NATIVE_CLASS 32
2826ac7e	87	#include "elf/readelflib.c"
aaca11d8 UD	88
	89	#undef __ELF_NATIVE_CLASS
	90	#undef process_elf_file
	91	#define process_elf_file process_elf64_file
	92	#define __ELF_NATIVE_CLASS 64
2826ac7e	93	#include "elf/readelflib.c"