1 /* SPDX-License-Identifier: GPL-2.0 */
2 #ifndef _PPC_BOOT_ELF_H_
3 #define _PPC_BOOT_ELF_H_
4 
5 /* 32-bit ELF base types. */
6 typedef unsigned int Elf32_Addr;
7 typedef unsigned short Elf32_Half;
8 typedef unsigned int Elf32_Off;
9 typedef signed int Elf32_Sword;
10 typedef unsigned int Elf32_Word;
11 
12 /* 64-bit ELF base types. */
13 typedef unsigned long long Elf64_Addr;
14 typedef unsigned short Elf64_Half;
15 typedef signed short Elf64_SHalf;
16 typedef unsigned long long Elf64_Off;
17 typedef signed int Elf64_Sword;
18 typedef unsigned int Elf64_Word;
19 typedef unsigned long long Elf64_Xword;
20 typedef signed long long Elf64_Sxword;
21 
22 /* These constants are for the segment types stored in the image headers */
23 #define PT_NULL    0
24 #define PT_LOAD    1
25 #define PT_DYNAMIC 2
26 #define PT_INTERP  3
27 #define PT_NOTE    4
28 #define PT_SHLIB   5
29 #define PT_PHDR    6
30 #define PT_TLS     7		/* Thread local storage segment */
31 #define PT_LOOS    0x60000000	/* OS-specific */
32 #define PT_HIOS    0x6fffffff	/* OS-specific */
33 #define PT_LOPROC  0x70000000
34 #define PT_HIPROC  0x7fffffff
35 #define PT_GNU_EH_FRAME		0x6474e550
36 
37 #define PT_GNU_STACK	(PT_LOOS + 0x474e551)
38 
39 /* These constants define the different elf file types */
40 #define ET_NONE   0
41 #define ET_REL    1
42 #define ET_EXEC   2
43 #define ET_DYN    3
44 #define ET_CORE   4
45 #define ET_LOPROC 0xff00
46 #define ET_HIPROC 0xffff
47 
48 /* These constants define the various ELF target machines */
49 #define EM_NONE  0
50 #define EM_PPC	       20	/* PowerPC */
51 #define EM_PPC64       21	/* PowerPC64 */
52 
53 #define EI_NIDENT	16
54 
55 typedef struct elf32_hdr {
56 	unsigned char e_ident[EI_NIDENT];
57 	Elf32_Half e_type;
58 	Elf32_Half e_machine;
59 	Elf32_Word e_version;
60 	Elf32_Addr e_entry;	/* Entry point */
61 	Elf32_Off e_phoff;
62 	Elf32_Off e_shoff;
63 	Elf32_Word e_flags;
64 	Elf32_Half e_ehsize;
65 	Elf32_Half e_phentsize;
66 	Elf32_Half e_phnum;
67 	Elf32_Half e_shentsize;
68 	Elf32_Half e_shnum;
69 	Elf32_Half e_shstrndx;
70 } Elf32_Ehdr;
71 
72 typedef struct elf64_hdr {
73 	unsigned char e_ident[16];	/* ELF "magic number" */
74 	Elf64_Half e_type;
75 	Elf64_Half e_machine;
76 	Elf64_Word e_version;
77 	Elf64_Addr e_entry;	/* Entry point virtual address */
78 	Elf64_Off e_phoff;	/* Program header table file offset */
79 	Elf64_Off e_shoff;	/* Section header table file offset */
80 	Elf64_Word e_flags;
81 	Elf64_Half e_ehsize;
82 	Elf64_Half e_phentsize;
83 	Elf64_Half e_phnum;
84 	Elf64_Half e_shentsize;
85 	Elf64_Half e_shnum;
86 	Elf64_Half e_shstrndx;
87 } Elf64_Ehdr;
88 
89 /* These constants define the permissions on sections in the program
90    header, p_flags. */
91 #define PF_R		0x4
92 #define PF_W		0x2
93 #define PF_X		0x1
94 
95 typedef struct elf32_phdr {
96 	Elf32_Word p_type;
97 	Elf32_Off p_offset;
98 	Elf32_Addr p_vaddr;
99 	Elf32_Addr p_paddr;
100 	Elf32_Word p_filesz;
101 	Elf32_Word p_memsz;
102 	Elf32_Word p_flags;
103 	Elf32_Word p_align;
104 } Elf32_Phdr;
105 
106 typedef struct elf64_phdr {
107 	Elf64_Word p_type;
108 	Elf64_Word p_flags;
109 	Elf64_Off p_offset;	/* Segment file offset */
110 	Elf64_Addr p_vaddr;	/* Segment virtual address */
111 	Elf64_Addr p_paddr;	/* Segment physical address */
112 	Elf64_Xword p_filesz;	/* Segment size in file */
113 	Elf64_Xword p_memsz;	/* Segment size in memory */
114 	Elf64_Xword p_align;	/* Segment alignment, file & memory */
115 } Elf64_Phdr;
116 
117 #define	EI_MAG0		0	/* e_ident[] indexes */
118 #define	EI_MAG1		1
119 #define	EI_MAG2		2
120 #define	EI_MAG3		3
121 #define	EI_CLASS	4
122 #define	EI_DATA		5
123 #define	EI_VERSION	6
124 #define	EI_OSABI	7
125 #define	EI_PAD		8
126 
127 #define	ELFMAG0		0x7f	/* EI_MAG */
128 #define	ELFMAG1		'E'
129 #define	ELFMAG2		'L'
130 #define	ELFMAG3		'F'
131 #define	ELFMAG		"\177ELF"
132 #define	SELFMAG		4
133 
134 #define	ELFCLASSNONE	0	/* EI_CLASS */
135 #define	ELFCLASS32	1
136 #define	ELFCLASS64	2
137 #define	ELFCLASSNUM	3
138 
139 #define ELFDATANONE	0	/* e_ident[EI_DATA] */
140 #define ELFDATA2LSB	1
141 #define ELFDATA2MSB	2
142 
143 #define EV_NONE		0	/* e_version, EI_VERSION */
144 #define EV_CURRENT	1
145 #define EV_NUM		2
146 
147 #define ELFOSABI_NONE	0
148 #define ELFOSABI_LINUX	3
149 
150 struct elf_info {
151 	unsigned long loadsize;
152 	unsigned long memsize;
153 	unsigned long elfoffset;
154 };
155 int parse_elf64(void *hdr, struct elf_info *info);
156 int parse_elf32(void *hdr, struct elf_info *info);
157 
158 #endif				/* _PPC_BOOT_ELF_H_ */
159