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/arch/powerpc/boot/elf_util.c

https://github.com/aicjofs/android_kernel_lge_v500_20d
C | 78 lines | 59 code | 9 blank | 10 comment | 28 complexity | 92f5aef8bc0eddf537fa397f5e5bcb75 MD5 | raw file
 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	      elf64->e_ident[EI_DATA]  == ELFDATA2MSB	&&
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
50int 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}