arch/powerpc/boot/elf_util.c

   1 // SPDX-License-Identifier: GPL-2.0-or-later
   2 /*
   3  * Copyright (C) Paul Mackerras 1997.
   4  *
   5  * Updates for PPC64 by Todd Inglett, Dave Engebretsen & Peter Bergner.
   6  */
   7 #include <stdarg.h>
   8 #include <stddef.h>
   9 #include "elf.h"
  10 #include "page.h"
  11 #include "string.h"
  12 #include "stdio.h"
  13
  14 int parse_elf64(void *hdr, struct elf_info *info)
  15 {
  16         Elf64_Ehdr *elf64 = hdr;
  17         Elf64_Phdr *elf64ph;
  18         unsigned int i;
  19
  20         if (!(elf64->e_ident[EI_MAG0]  == ELFMAG0       &&
  21               elf64->e_ident[EI_MAG1]  == ELFMAG1       &&
  22               elf64->e_ident[EI_MAG2]  == ELFMAG2       &&
  23               elf64->e_ident[EI_MAG3]  == ELFMAG3       &&
  24               elf64->e_ident[EI_CLASS] == ELFCLASS64    &&
  25 #ifdef __LITTLE_ENDIAN__
  26               elf64->e_ident[EI_DATA]  == ELFDATA2LSB   &&
  27 #else
  28               elf64->e_ident[EI_DATA]  == ELFDATA2MSB   &&
  29 #endif
  30               (elf64->e_type            == ET_EXEC ||
  31                elf64->e_type            == ET_DYN)      &&
  32               elf64->e_machine         == EM_PPC64))
  33                 return 0;
  34
  35         elf64ph = (Elf64_Phdr *)((unsigned long)elf64 +
  36                                  (unsigned long)elf64->e_phoff);
  37         for (i = 0; i < (unsigned int)elf64->e_phnum; i++, elf64ph++)
  38                 if (elf64ph->p_type == PT_LOAD)
  39                         break;
  40         if (i >= (unsigned int)elf64->e_phnum)
  41                 return 0;
  42
  43         info->loadsize = (unsigned long)elf64ph->p_filesz;
  44         info->memsize = (unsigned long)elf64ph->p_memsz;
  45         info->elfoffset = (unsigned long)elf64ph->p_offset;
  46
  47         return 1;
  48 }
  49
  50 int parse_elf32(void *hdr, struct elf_info *info)
  51 {
  52         Elf32_Ehdr *elf32 = hdr;
  53         Elf32_Phdr *elf32ph;
  54         unsigned int i;
  55
  56         if (!(elf32->e_ident[EI_MAG0]  == ELFMAG0       &&
  57               elf32->e_ident[EI_MAG1]  == ELFMAG1       &&
  58               elf32->e_ident[EI_MAG2]  == ELFMAG2       &&
  59               elf32->e_ident[EI_MAG3]  == ELFMAG3       &&
  60               elf32->e_ident[EI_CLASS] == ELFCLASS32    &&
  61               elf32->e_ident[EI_DATA]  == ELFDATA2MSB   &&
  62               (elf32->e_type            == ET_EXEC ||
  63                elf32->e_type            == ET_DYN)      &&
  64               elf32->e_machine         == EM_PPC))
  65                 return 0;
  66
  67         elf32ph = (Elf32_Phdr *) ((unsigned long)elf32 + elf32->e_phoff);
  68         for (i = 0; i < elf32->e_phnum; i++, elf32ph++)
  69                 if (elf32ph->p_type == PT_LOAD)
  70                         break;
  71         if (i >= elf32->e_phnum)
  72                 return 0;
  73
  74         info->loadsize = elf32ph->p_filesz;
  75         info->memsize = elf32ph->p_memsz;
  76         info->elfoffset = elf32ph->p_offset;
  77         return 1;
  78 }