LXR linux/arch/powerpc/boot/elf

   1/*
   2 * Copyright (C) Paul Mackerras 1997.
   3 *
   4 * Updates for PPC64 by Todd Inglett, Dave Engebretsen & Peter Bergner.
   5 *
   6 * This program is free software; you can redistribute it and/or
   7 * modify it under the terms of the GNU General Public License
   8 * as published by the Free Software Foundation; either version
   9 * 2 of the License, or (at your option) any later version.
  10 */
  11#include <stdarg.h>
  12#include <stddef.h>
  13#include "elf.h"
  14#include "page.h"
  15#include "string.h"
  16#include "stdio.h"
  17
  18int parse_elf64(void *hdr, struct elf_info *info)
  19{
  20        Elf64_Ehdr *elf64 = hdr;
  21        Elf64_Phdr *elf64ph;
  22        unsigned int i;
  23
  24        if (!(elf64->e_ident[EI_MAG0]  == ELFMAG0       &&
  25              elf64->e_ident[EI_MAG1]  == ELFMAG1       &&
  26              elf64->e_ident[EI_MAG2]  == ELFMAG2       &&
  27              elf64->e_ident[EI_MAG3]  == ELFMAG3       &&
  28              elf64->e_ident[EI_CLASS] == ELFCLASS64    &&
  29#ifdef __LITTLE_ENDIAN__
  30              elf64->e_ident[EI_DATA]  == ELFDATA2LSB   &&
  31#else
  32              elf64->e_ident[EI_DATA]  == ELFDATA2MSB   &&
  33#endif
  34              (elf64->e_type            == ET_EXEC ||
  35               elf64->e_type            == ET_DYN)      &&
  36              elf64->e_machine         == EM_PPC64))
  37                return 0;
  38
  39        elf64ph = (Elf64_Phdr *)((unsigned long)elf64 +
  40                                 (unsigned long)elf64->e_phoff);
  41        for (i = 0; i < (unsigned int)elf64->e_phnum; i++, elf64ph++)
  42                if (elf64ph->p_type == PT_LOAD)
  43                        break;
  44        if (i >= (unsigned int)elf64->e_phnum)
  45                return 0;
  46
  47        info->loadsize = (unsigned long)elf64ph->p_filesz;
  48        info->memsize = (unsigned long)elf64ph->p_memsz;
  49        info->elfoffset = (unsigned long)elf64ph->p_offset;
  50
  51        return 1;
  52}
  53
  54int parse_elf32(void *hdr, struct elf_info *info)
  55{
  56        Elf32_Ehdr *elf32 = hdr;
  57        Elf32_Phdr *elf32ph;
  58        unsigned int i;
  59
  60        if (!(elf32->e_ident[EI_MAG0]  == ELFMAG0       &&
  61              elf32->e_ident[EI_MAG1]  == ELFMAG1       &&
  62              elf32->e_ident[EI_MAG2]  == ELFMAG2       &&
  63              elf32->e_ident[EI_MAG3]  == ELFMAG3       &&
  64              elf32->e_ident[EI_CLASS] == ELFCLASS32    &&
  65              elf32->e_ident[EI_DATA]  == ELFDATA2MSB   &&
  66              (elf32->e_type            == ET_EXEC ||
  67               elf32->e_type            == ET_DYN)      &&
  68              elf32->e_machine         == EM_PPC))
  69                return 0;
  70
  71        elf32ph = (Elf32_Phdr *) ((unsigned long)elf32 + elf32->e_phoff);
  72        for (i = 0; i < elf32->e_phnum; i++, elf32ph++)
  73                if (elf32ph->p_type == PT_LOAD)
  74                        break;
  75        if (i >= elf32->e_phnum)
  76                return 0;
  77
  78        info->loadsize = elf32ph->p_filesz;
  79        info->memsize = elf32ph->p_memsz;
  80        info->elfoffset = elf32ph->p_offset;
  81        return 1;
  82}
  83