sysdeps/unix/sysv/linux/mips/readelflib.c

   1 /* Copyright (C) 1999-2019 Free Software Foundation, Inc.
   2    This file is part of the GNU C Library.
   3    Contributed by Alexandre Oliva <aoliva@redhat.com>
   4    Based on work ../x86_64/readelflib.c,
   5    contributed by Andreas Jaeger <aj@suse.de>, 1999 and
   6                   Jakub Jelinek <jakub@redhat.com>, 1999.
   7
   8    The GNU C Library is free software; you can redistribute it and/or
   9    modify it under the terms of the GNU Lesser General Public
  10    License as published by the Free Software Foundation; either
  11    version 2.1 of the License, or (at your option) any later version.
  12
  13    The GNU C Library is distributed in the hope that it will be useful,
  14    but WITHOUT ANY WARRANTY; without even the implied warranty of
  15    MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the GNU
  16    Lesser General Public License for more details.
  17
  18    You should have received a copy of the GNU Lesser General Public
  19    License along with the GNU C Library.  If not, see
  20    <http://www.gnu.org/licenses/>.  */
  21
  22
  23 int process_elf32_file (const char *file_name, const char *lib, int *flag,
  24                         unsigned int *osversion, char **soname,
  25                         void *file_contents, size_t file_length);
  26 int process_elf64_file (const char *file_name, const char *lib, int *flag,
  27                         unsigned int *osversion, char **soname,
  28                         void *file_contents, size_t file_length);
  29
  30 /* Returns 0 if everything is ok, != 0 in case of error.  */
  31 int
  32 process_elf_file (const char *file_name, const char *lib, int *flag,
  33                   unsigned int *osversion, char **soname, void *file_contents,
  34                   size_t file_length)
  35 {
  36   union
  37     {
  38       Elf64_Ehdr *eh64;
  39       Elf32_Ehdr *eh32;
  40       ElfW(Ehdr) *eh;
  41     }
  42   elf_header;
  43   int ret;
  44
  45   elf_header.eh = file_contents;
  46   if (elf_header.eh->e_ident [EI_CLASS] == ELFCLASS32)
  47     {
  48       ret = process_elf32_file (file_name, lib, flag, osversion, soname,
  49                                 file_contents, file_length);
  50       if (!ret)
  51         {
  52           Elf32_Word flags = elf_header.eh32->e_flags;
  53           int nan2008 = (flags & EF_MIPS_NAN2008) != 0;
  54
  55           /* n32 libraries are always libc.so.6+, o32 only if 2008 NaN.  */
  56           if ((flags & EF_MIPS_ABI2) != 0)
  57             *flag = (nan2008 ? FLAG_MIPS64_LIBN32_NAN2008
  58                      : FLAG_MIPS64_LIBN32) | FLAG_ELF_LIBC6;
  59           else if (nan2008)
  60             *flag = FLAG_MIPS_LIB32_NAN2008 | FLAG_ELF_LIBC6;
  61         }
  62     }
  63   else
  64     {
  65       ret = process_elf64_file (file_name, lib, flag, osversion, soname,
  66                                 file_contents, file_length);
  67       /* n64 libraries are always libc.so.6+.  */
  68       if (!ret)
  69         {
  70           Elf64_Word flags = elf_header.eh64->e_flags;
  71           int nan2008 = (flags & EF_MIPS_NAN2008) != 0;
  72
  73           *flag = (nan2008 ? FLAG_MIPS64_LIBN64_NAN2008
  74                    : FLAG_MIPS64_LIBN64) | FLAG_ELF_LIBC6;
  75         }
  76     }
  77
  78   return ret;
  79 }
  80
  81 #undef __ELF_NATIVE_CLASS
  82 #undef process_elf_file
  83 #define process_elf_file process_elf32_file
  84 #define __ELF_NATIVE_CLASS 32
  85 #include "elf/readelflib.c"
  86
  87 #undef __ELF_NATIVE_CLASS
  88 #undef process_elf_file
  89 #define process_elf_file process_elf64_file
  90 #define __ELF_NATIVE_CLASS 64
  91 #include "elf/readelflib.c"