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elf_util.c

/*
 * Copyright (C) Paul Mackerras 1997.
 *
 * Updates for PPC64 by Todd Inglett, Dave Engebretsen & Peter Bergner.
 *
 * This program is free software; you can redistribute it and/or
 * modify it under the terms of the GNU General Public License
 * as published by the Free Software Foundation; either version
 * 2 of the License, or (at your option) any later version.
 */
#include <stdarg.h>
#include <stddef.h>
#include "elf.h"
#include "page.h"
#include "string.h"
#include "stdio.h"

int parse_elf64(void *hdr, struct elf_info *info)
{
      Elf64_Ehdr *elf64 = hdr;
      Elf64_Phdr *elf64ph;
      unsigned int i;

      if (!(elf64->e_ident[EI_MAG0]  == ELFMAG0 &&
            elf64->e_ident[EI_MAG1]  == ELFMAG1 &&
            elf64->e_ident[EI_MAG2]  == ELFMAG2 &&
            elf64->e_ident[EI_MAG3]  == ELFMAG3 &&
            elf64->e_ident[EI_CLASS] == ELFCLASS64    &&
            elf64->e_ident[EI_DATA]  == ELFDATA2MSB   &&
            elf64->e_type            == ET_EXEC &&
            elf64->e_machine         == EM_PPC64))
            return 0;

      elf64ph = (Elf64_Phdr *)((unsigned long)elf64 +
                         (unsigned long)elf64->e_phoff);
      for (i = 0; i < (unsigned int)elf64->e_phnum; i++, elf64ph++)
            if (elf64ph->p_type == PT_LOAD)
                  break;
      if (i >= (unsigned int)elf64->e_phnum)
            return 0;

      info->loadsize = (unsigned long)elf64ph->p_filesz;
      info->memsize = (unsigned long)elf64ph->p_memsz;
      info->elfoffset = (unsigned long)elf64ph->p_offset;

      return 1;
}

int parse_elf32(void *hdr, struct elf_info *info)
{
      Elf32_Ehdr *elf32 = hdr;
      Elf32_Phdr *elf32ph;
      unsigned int i;

      if (!(elf32->e_ident[EI_MAG0]  == ELFMAG0 &&
            elf32->e_ident[EI_MAG1]  == ELFMAG1 &&
            elf32->e_ident[EI_MAG2]  == ELFMAG2 &&
            elf32->e_ident[EI_MAG3]  == ELFMAG3 &&
            elf32->e_ident[EI_CLASS] == ELFCLASS32    &&
            elf32->e_ident[EI_DATA]  == ELFDATA2MSB   &&
            elf32->e_type            == ET_EXEC &&
            elf32->e_machine         == EM_PPC))
            return 0;

      elf32ph = (Elf32_Phdr *) ((unsigned long)elf32 + elf32->e_phoff);
      for (i = 0; i < elf32->e_phnum; i++, elf32ph++)
            if (elf32ph->p_type == PT_LOAD)
                  break;
      if (i >= elf32->e_phnum)
            return 0;

      info->loadsize = elf32ph->p_filesz;
      info->memsize = elf32ph->p_memsz;
      info->elfoffset = elf32ph->p_offset;
      return 1;
}

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