arch/powerpc/boot/elf_util.c

   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
  18 int 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
  54 int 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 }