/* Support for reading ELF files.

   Copyright (C) 1999-2018 Free Software Foundation, Inc.

   This file is part of the GNU C Library.

   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);

/* The ELF flags supported by our current glibc port:

   - EF_RISCV_FLOAT_ABI: We support the soft and double ABIs.

   - EF_RISCV_RVC: While the Linux ABI mandates the presence of the C

     extension, we can still support libraries compiled without that extension

     so we just ignore this flag.

   - EF_RISCV_RVE: glibc (and Linux) don't support RV32E based systems.

   - EF_RISCV_TSO: The TSO extension isn't supported, as doing so would require

     some mechanism to ensure that the TSO extension is enabled which doesn't

     currently exist.  */

#define SUPPORTED_ELF_FLAGS (EF_RISCV_FLOAT_ABI | EF_RISCV_RVC)

/* 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;

  Elf32_Ehdr *elf32_header = (Elf32_Ehdr *) elf_header;

  Elf64_Ehdr *elf64_header = (Elf64_Ehdr *) elf_header;

  int ret;

  long flags;

  /* RISC-V libraries are always libc.so.6+.  */

  *flag = FLAG_ELF_LIBC6;

  if (elf_header->e_ident [EI_CLASS] == ELFCLASS32)

    {

      ret = process_elf32_file (file_name, lib, flag, osversion, soname,

				file_contents, file_length);

      flags = elf32_header->e_flags;

    }

  else

    {

      ret = process_elf64_file (file_name, lib, flag, osversion, soname,

				file_contents, file_length);

      flags = elf64_header->e_flags;

    }

  /* RISC-V linkers encode the floating point ABI as part of the ELF headers.  */

  switch (flags & EF_RISCV_FLOAT_ABI)

    {

      case EF_RISCV_FLOAT_ABI_SOFT:

        *flag |= FLAG_RISCV_FLOAT_ABI_SOFT;

	break;

      case EF_RISCV_FLOAT_ABI_DOUBLE:

        *flag |= FLAG_RISCV_FLOAT_ABI_DOUBLE;

	break;

      default:

        return 1;

    }

  /* If there are any other ELF flags set then glibc doesn't support this

     library.  */

  if (flags & ~SUPPORTED_ELF_FLAGS)

    return 1;

  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"