elf_util.c

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/*
 * 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_type            == ET_DYN)  &&
          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_type            == ET_DYN)      &&
          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;
}