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  int process_elf32_file (const char *file_name, const char *lib,
      19  			int *flag, unsigned int *isa_level, char **soname,
      20  			void *file_contents, size_t file_length);
      21  int process_elf64_file (const char *file_name, const char *lib,
      22  			int *flag, unsigned int *isa_level, char **soname,
      23  			void *file_contents, size_t file_length);
      24  
      25  /* Returns 0 if everything is ok, != 0 in case of error.  */
      26  int
      27  process_elf_file (const char *file_name, const char *lib, int *flag,
      28  		  unsigned int *isa_level, char **soname, void *file_contents,
      29  		  size_t file_length)
      30  {
      31    ElfW(Ehdr) *elf_header = (ElfW(Ehdr) *) file_contents;
      32    int ret, file_flag = 0;
      33  
      34    switch (elf_header->e_machine)
      35      {
      36      case EM_X86_64:
      37        if (elf_header->e_ident[EI_CLASS] == ELFCLASS64)
      38  	/* X86-64 64bit libraries are always libc.so.6+.  */
      39  	file_flag = FLAG_X8664_LIB64|FLAG_ELF_LIBC6;
      40        else
      41  	/* X32 libraries are always libc.so.6+.  */
      42  	file_flag = FLAG_X8664_LIBX32|FLAG_ELF_LIBC6;
      43        break;
      44  #ifndef __x86_64__
      45      case EM_IA_64:
      46        if (elf_header->e_ident[EI_CLASS] == ELFCLASS64)
      47  	{
      48  	  /* IA64 64bit libraries are always libc.so.6+.  */
      49  	  file_flag = FLAG_IA64_LIB64|FLAG_ELF_LIBC6;
      50  	  break;
      51  	}
      52        goto failed;
      53  #endif
      54      case EM_386:
      55        if (elf_header->e_ident[EI_CLASS] == ELFCLASS32)
      56  	break;
      57        /* Fall through.  */
      58      default:
      59  #ifndef __x86_64__
      60  failed:
      61  #endif
      62        error (0, 0, _("%s is for unknown machine %d.\n"),
      63  	     file_name, elf_header->e_machine);
      64        return 1;
      65      }
      66  
      67    if (elf_header->e_ident[EI_CLASS] == ELFCLASS32)
      68      ret = process_elf32_file (file_name, lib, flag, isa_level, soname,
      69  			      file_contents, file_length);
      70    else
      71      ret = process_elf64_file (file_name, lib, flag, isa_level, soname,
      72  			      file_contents, file_length);
      73  
      74    if (!ret && file_flag)
      75      *flag = file_flag;
      76  
      77    return ret;
      78  }
      79  
      80  #undef __ELF_NATIVE_CLASS
      81  #undef process_elf_file
      82  #define process_elf_file process_elf32_file
      83  #define __ELF_NATIVE_CLASS 32
      84  #include "elf/readelflib.c"
      85  
      86  #undef __ELF_NATIVE_CLASS
      87  #undef process_elf_file
      88  #define process_elf_file process_elf64_file
      89  #define __ELF_NATIVE_CLASS 64
      90  #include "elf/readelflib.c"