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 
parse_elf64(void * hdr,struct elf_info * info)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 
parse_elf32(void * hdr,struct elf_info * info)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 }
79