powerpc/boot/elf_util.c

0001 // SPDX-License-Identifier: GPL-2.0-or-later
0002 /*
0003  * Copyright (C) Paul Mackerras 1997.
0004  *
0005  * Updates for PPC64 by Todd Inglett, Dave Engebretsen & Peter Bergner.
0006  */
0007 #include <stdarg.h>
0008 #include <stddef.h>
0009 #include "elf.h"
0010 #include "page.h"
0011 #include "string.h"
0012 #include "stdio.h"
0013
0014 int parse_elf64(void *hdr, struct elf_info *info)
0015 {
0016     Elf64_Ehdr *elf64 = hdr;
0017     Elf64_Phdr *elf64ph;
0018     unsigned int i;
0019
0020     if (!(elf64->e_ident[EI_MAG0]  == ELFMAG0   &&
0021           elf64->e_ident[EI_MAG1]  == ELFMAG1   &&
0022           elf64->e_ident[EI_MAG2]  == ELFMAG2   &&
0023           elf64->e_ident[EI_MAG3]  == ELFMAG3   &&
0024           elf64->e_ident[EI_CLASS] == ELFCLASS64    &&
0025 #ifdef __LITTLE_ENDIAN__
0026           elf64->e_ident[EI_DATA]  == ELFDATA2LSB   &&
0027 #else
0028           elf64->e_ident[EI_DATA]  == ELFDATA2MSB   &&
0029 #endif
0030           (elf64->e_type            == ET_EXEC ||
0031            elf64->e_type            == ET_DYN)  &&
0032           elf64->e_machine         == EM_PPC64))
0033         return 0;
0034
0035     elf64ph = (Elf64_Phdr *)((unsigned long)elf64 +
0036                  (unsigned long)elf64->e_phoff);
0037     for (i = 0; i < (unsigned int)elf64->e_phnum; i++, elf64ph++)
0038         if (elf64ph->p_type == PT_LOAD)
0039             break;
0040     if (i >= (unsigned int)elf64->e_phnum)
0041         return 0;
0042
0043     info->loadsize = (unsigned long)elf64ph->p_filesz;
0044     info->memsize = (unsigned long)elf64ph->p_memsz;
0045     info->elfoffset = (unsigned long)elf64ph->p_offset;
0046
0047     return 1;
0048 }
0049
0050 int parse_elf32(void *hdr, struct elf_info *info)
0051 {
0052     Elf32_Ehdr *elf32 = hdr;
0053     Elf32_Phdr *elf32ph;
0054     unsigned int i;
0055
0056     if (!(elf32->e_ident[EI_MAG0]  == ELFMAG0   &&
0057           elf32->e_ident[EI_MAG1]  == ELFMAG1   &&
0058           elf32->e_ident[EI_MAG2]  == ELFMAG2   &&
0059           elf32->e_ident[EI_MAG3]  == ELFMAG3   &&
0060           elf32->e_ident[EI_CLASS] == ELFCLASS32    &&
0061           elf32->e_ident[EI_DATA]  == ELFDATA2MSB   &&
0062           (elf32->e_type            == ET_EXEC ||
0063            elf32->e_type            == ET_DYN)      &&
0064           elf32->e_machine         == EM_PPC))
0065         return 0;
0066
0067     elf32ph = (Elf32_Phdr *) ((unsigned long)elf32 + elf32->e_phoff);
0068     for (i = 0; i < elf32->e_phnum; i++, elf32ph++)
0069         if (elf32ph->p_type == PT_LOAD)
0070             break;
0071     if (i >= elf32->e_phnum)
0072         return 0;
0073
0074     info->loadsize = elf32ph->p_filesz;
0075     info->memsize = elf32ph->p_memsz;
0076     info->elfoffset = elf32ph->p_offset;
0077     return 1;
0078 }