GNU Linux-libre 4.14.266-gnu1
[releases.git] / 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 }