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

   1 /* Copyright (C) 1999-2024 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   ElfW(Ehdr) *elf_header = (ElfW(Ehdr) *) file_contents;
  33   int ret;
  34
  35   if (elf_header->e_ident [EI_CLASS] == ELFCLASS32)
  36     {
  37       Elf32_Ehdr *elf32_header = (Elf32_Ehdr *) elf_header;
  38
  39       ret = process_elf32_file (file_name, lib, flag, isa_level, soname,
  40                                 file_contents, file_length);
  41
  42       if (!ret && EF_ARM_EABI_VERSION (elf32_header->e_flags) == EF_ARM_EABI_VER5)
  43         {
  44           if (elf32_header->e_flags & EF_ARM_ABI_FLOAT_HARD)
  45             *flag = FLAG_ARM_LIBHF|FLAG_ELF_LIBC6;
  46           else if (elf32_header->e_flags & EF_ARM_ABI_FLOAT_SOFT)
  47             *flag = FLAG_ARM_LIBSF|FLAG_ELF_LIBC6;
  48           else
  49             /* We must assume the unmarked objects are compatible
  50                with all ABI variants. Such objects may have been
  51                generated in a transitional period when the ABI
  52                tags were not added to all objects.  */
  53             *flag = FLAG_ELF_LIBC6;
  54         }
  55     }
  56   else
  57     {
  58       ret = process_elf64_file (file_name, lib, flag, isa_level, soname,
  59                                 file_contents, file_length);
  60       /* AArch64 libraries are always libc.so.6+.  */
  61       if (!ret)
  62         *flag = FLAG_AARCH64_LIB64|FLAG_ELF_LIBC6;
  63     }
  64   return ret;
  65 }
  66
  67 #undef __ELF_NATIVE_CLASS
  68 #undef process_elf_file
  69 #define process_elf_file process_elf32_file
  70 #define __ELF_NATIVE_CLASS 32
  71 #include "elf/readelflib.c"
  72
  73 #undef __ELF_NATIVE_CLASS
  74 #undef process_elf_file
  75 #define process_elf_file process_elf64_file
  76 #define __ELF_NATIVE_CLASS 64
  77 #include "elf/readelflib.c"