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

   1 /* Copyright (C) 1999-2023 Free Software Foundation, Inc.
   2    This file is part of the GNU C Library.
   3
   4    The GNU C Library is free software; you can redistribute it and/or
   5    modify it under the terms of the GNU Lesser General Public
   6    License as published by the Free Software Foundation; either
   7    version 2.1 of the License, or (at your option) any later version.
   8
   9    The GNU C Library is distributed in the hope that it will be useful,
  10    but WITHOUT ANY WARRANTY; without even the implied warranty of
  11    MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the GNU
  12    Lesser General Public License for more details.
  13
  14    You should have received a copy of the GNU Lesser General Public
  15    License along with the GNU C Library.  If not, see
  16    <https://www.gnu.org/licenses/>.  */
  17
  18
  19 int process_elf32_file (const char *file_name, const char *lib,
  20                         int *flag, unsigned int *isa_level, char **soname,
  21                         void *file_contents, size_t file_length);
  22 int process_elf64_file (const char *file_name, const char *lib,
  23                         int *flag, unsigned int *isa_level, char **soname,
  24                         void *file_contents, size_t file_length);
  25
  26 /* Returns 0 if everything is ok, != 0 in case of error.  */
  27 int
  28 process_elf_file (const char *file_name, const char *lib, int *flag,
  29                   unsigned int *isa_level, char **soname, void *file_contents,
  30                   size_t file_length)
  31 {
  32   union
  33     {
  34       Elf64_Ehdr *eh64;
  35       Elf32_Ehdr *eh32;
  36       ElfW(Ehdr) *eh;
  37     }
  38   elf_header;
  39   int ret;
  40
  41   elf_header.eh = file_contents;
  42   if (elf_header.eh->e_ident [EI_CLASS] == ELFCLASS32)
  43     {
  44       ret = process_elf32_file (file_name, lib, flag, isa_level, soname,
  45                                 file_contents, file_length);
  46       if (!ret)
  47         {
  48           Elf32_Word flags = elf_header.eh32->e_flags;
  49           int nan2008 = (flags & EF_MIPS_NAN2008) != 0;
  50
  51           /* n32 libraries are always libc.so.6+, o32 only if 2008 NaN.  */
  52           if ((flags & EF_MIPS_ABI2) != 0)
  53             *flag = (nan2008 ? FLAG_MIPS64_LIBN32_NAN2008
  54                      : FLAG_MIPS64_LIBN32) | FLAG_ELF_LIBC6;
  55           else if (nan2008)
  56             *flag = FLAG_MIPS_LIB32_NAN2008 | FLAG_ELF_LIBC6;
  57         }
  58     }
  59   else
  60     {
  61       ret = process_elf64_file (file_name, lib, flag, isa_level, soname,
  62                                 file_contents, file_length);
  63       /* n64 libraries are always libc.so.6+.  */
  64       if (!ret)
  65         {
  66           Elf64_Word flags = elf_header.eh64->e_flags;
  67           int nan2008 = (flags & EF_MIPS_NAN2008) != 0;
  68
  69           *flag = (nan2008 ? FLAG_MIPS64_LIBN64_NAN2008
  70                    : FLAG_MIPS64_LIBN64) | FLAG_ELF_LIBC6;
  71         }
  72     }
  73
  74   return ret;
  75 }
  76
  77 #undef __ELF_NATIVE_CLASS
  78 #undef process_elf_file
  79 #define process_elf_file process_elf32_file
  80 #define __ELF_NATIVE_CLASS 32
  81 #include "elf/readelflib.c"
  82
  83 #undef __ELF_NATIVE_CLASS
  84 #undef process_elf_file
  85 #define process_elf_file process_elf64_file
  86 #define __ELF_NATIVE_CLASS 64
  87 #include "elf/readelflib.c"