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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 
parse_elf64(void * hdr,struct elf_info * info)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 
parse_elf32(void * hdr,struct elf_info * info)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 }
83