source: mainline/generic/include/elf.h@ 303c94c

lfn serial ticket/834-toolchain-update topic/msim-upgrade topic/simplify-dev-export
Last change on this file since 303c94c was 78a95d6f, checked in by Jakub Jermar <jakub@…>, 20 years ago

Support for loading segments containing .bss section.
  • Property mode set to 100644
File size: 7.6 KB
Line 
1/*
2 * Copyright (C) 2006 Sergey Bondari
3 * All rights reserved.
4 *
5 * Redistribution and use in source and binary forms, with or without
6 * modification, are permitted provided that the following conditions
7 * are met:
8 *
9 * - Redistributions of source code must retain the above copyright
10 * notice, this list of conditions and the following disclaimer.
11 * - Redistributions in binary form must reproduce the above copyright
12 * notice, this list of conditions and the following disclaimer in the
13 * documentation and/or other materials provided with the distribution.
14 * - The name of the author may not be used to endorse or promote products
15 * derived from this software without specific prior written permission.
16 *
17 * THIS SOFTWARE IS PROVIDED BY THE AUTHOR ``AS IS'' AND ANY EXPRESS OR
18 * IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED WARRANTIES
19 * OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE DISCLAIMED.
20 * IN NO EVENT SHALL THE AUTHOR BE LIABLE FOR ANY DIRECT, INDIRECT,
21 * INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT
22 * NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE,
23 * DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY
24 * THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT
25 * (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE OF
26 * THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
27 */
28
29#ifndef __ELF_H__
30#define __ELF_H__
31
32#include <arch/elf.h>
33#include <arch/types.h>
34#include <mm/as.h>
35
36/**
37 * current ELF version
38 */
39#define EV_CURRENT 1
40
41/**
42 * ELF types
43 */
44#define ET_NONE 0 /* No type */
45#define ET_REL 1 /* Relocatable file */
46#define ET_EXEC 2 /* Executable */
47#define ET_DYN 3 /* Shared object */
48#define ET_CORE 4 /* Core */
49#define ET_LOPROC 0xff00 /* Processor specific */
50#define ET_HIPROC 0xffff /* Processor specific */
51
52/**
53 * ELF machine types
54 */
55#define EM_NO 0 /* No machine */
56#define EM_SPARC 2 /* SPARC */
57#define EM_386 3 /* i386 */
58#define EM_MIPS 8 /* MIPS RS3000 */
59#define EM_MIPS_RS3_LE 10 /* MIPS RS3000 LE */
60#define EM_PPC 20 /* PPC32 */
61#define EM_PPC64 21 /* PPC64 */
62#define EM_SPARCV9 43 /* SPARC64 */
63#define EM_IA_64 50 /* IA-64 */
64#define EM_X86_64 62 /* AMD64/EMT64 */
65
66/**
67 * ELF identification indexes
68 */
69#define EI_MAG0 0
70#define EI_MAG1 1
71#define EI_MAG2 2
72#define EI_MAG3 3
73#define EI_CLASS 4 /* File class */
74#define EI_DATA 5 /* Data encoding */
75#define EI_VERSION 6 /* File version */
76#define EI_OSABI 7
77#define EI_ABIVERSION 8
78#define EI_PAD 9 /* Start of padding bytes */
79#define EI_NIDENT 16 /* ELF identification table size */
80
81/**
82 * ELF magic number
83 */
84#define ELFMAG0 0x7f
85#define ELFMAG1 'E'
86#define ELFMAG2 'L'
87#define ELFMAG3 'F'
88
89/**
90 * ELF file classes
91 */
92#define ELFCLASSNONE 0
93#define ELFCLASS32 1
94#define ELFCLASS64 2
95
96/**
97 * ELF data encoding types
98 */
99#define ELFDATANONE 0
100#define ELFDATA2LSB 1 /* Least significant byte first (little endian) */
101#define ELFDATA2MSB 2 /* Most signigicant byte first (big endian) */
102
103/**
104 * ELF error return codes
105 */
106#define EE_OK 0 /* No error */
107#define EE_INVALID 1 /* Invalid ELF image */
108#define EE_MEMORY 2 /* Cannot allocate address space */
109#define EE_INCOMPATIBLE 3 /* ELF image is not compatible with current architecture */
110#define EE_UNSUPPORTED 4 /* Non-supported ELF (e.g. dynamic ELFs) */
111#define EE_IRRECOVERABLE 5
112
113/**
114 * ELF section types
115 */
116#define SHT_NULL 0
117#define SHT_PROGBITS 1
118#define SHT_SYMTAB 2
119#define SHT_STRTAB 3
120#define SHT_RELA 4
121#define SHT_HASH 5
122#define SHT_DYNAMIC 6
123#define SHT_NOTE 7
124#define SHT_NOBITS 8
125#define SHT_REL 9
126#define SHT_SHLIB 10
127#define SHT_DYNSYM 11
128#define SHT_LOOS 0x60000000
129#define SHT_HIOS 0x6fffffff
130#define SHT_LOPROC 0x70000000
131#define SHT_HIPROC 0x7fffffff
132#define SHT_LOUSER 0x80000000
133#define SHT_HIUSER 0xffffffff
134
135/**
136 * ELF section flags
137 */
138#define SHF_WRITE 0x1
139#define SHF_ALLOC 0x2
140#define SHF_EXECINSTR 0x4
141#define SHF_MASKPROC 0xf0000000
142
143/**
144 * Symbol binding
145 */
146#define STB_LOCAL 0
147#define STB_GLOBAL 1
148#define STB_WEAK 2
149#define STB_LOPROC 13
150#define STB_HIPROC 15
151
152/**
153 * Symbol types
154 */
155#define STT_NOTYPE 0
156#define STT_OBJECT 1
157#define STT_FUNC 2
158#define STT_SECTION 3
159#define STT_FILE 4
160#define STT_LOPROC 13
161#define STT_HIPROC 15
162
163/**
164 * Program segment types
165 */
166#define PT_NULL 0
167#define PT_LOAD 1
168#define PT_DYNAMIC 2
169#define PT_INTERP 3
170#define PT_NOTE 4
171#define PT_SHLIB 5
172#define PT_PHDR 6
173#define PT_LOPROC 0x70000000
174#define PT_HIPROC 0x7fffffff
175
176/**
177 * Program segment attributes.
178 */
179#define PF_X 1
180#define PF_W 2
181#define PF_R 4
182
183/**
184 * ELF data types
185 *
186 * These types are found to be identical in both 32-bit and 64-bit
187 * ELF object file specifications. They are the only types used
188 * in ELF header.
189 */
190typedef __u64 elf_xword;
191typedef __s64 elf_sxword;
192typedef __u32 elf_word;
193typedef __s32 elf_sword;
194typedef __u16 elf_half;
195
196/**
197 * 32-bit ELF data types.
198 *
199 * These types are specific for 32-bit format.
200 */
201typedef __u32 elf32_addr;
202typedef __u32 elf32_off;
203
204/**
205 * 64-bit ELF data types.
206 *
207 * These types are specific for 64-bit format.
208 */
209typedef __u64 elf64_addr;
210typedef __u64 elf64_off;
211
212/** ELF header */
213struct elf32_header {
214 __u8 e_ident[EI_NIDENT];
215 elf_half e_type;
216 elf_half e_machine;
217 elf_word e_version;
218 elf32_addr e_entry;
219 elf32_off e_phoff;
220 elf32_off e_shoff;
221 elf_word e_flags;
222 elf_half e_ehsize;
223 elf_half e_phentsize;
224 elf_half e_phnum;
225 elf_half e_shentsize;
226 elf_half e_shnum;
227 elf_half e_shstrndx;
228};
229struct elf64_header {
230 __u8 e_ident[EI_NIDENT];
231 elf_half e_type;
232 elf_half e_machine;
233 elf_word e_version;
234 elf64_addr e_entry;
235 elf64_off e_phoff;
236 elf64_off e_shoff;
237 elf_word e_flags;
238 elf_half e_ehsize;
239 elf_half e_phentsize;
240 elf_half e_phnum;
241 elf_half e_shentsize;
242 elf_half e_shnum;
243 elf_half e_shstrndx;
244};
245
246/*
247 * ELF segment header.
248 * Segments headers are also known as program headers.
249 */
250struct elf32_segment_header {
251 elf_word p_type;
252 elf32_off p_offset;
253 elf32_addr p_vaddr;
254 elf32_addr p_paddr;
255 elf_word p_filesz;
256 elf_word p_memsz;
257 elf_word p_flags;
258 elf_word p_align;
259};
260struct elf64_segment_header {
261 elf_word p_type;
262 elf_word p_flags;
263 elf64_off p_offset;
264 elf64_addr p_vaddr;
265 elf64_addr p_paddr;
266 elf_xword p_filesz;
267 elf_xword p_memsz;
268 elf_xword p_align;
269};
270
271/*
272 * ELF section header
273 */
274struct elf32_section_header {
275 elf_word sh_name;
276 elf_word sh_type;
277 elf_word sh_flags;
278 elf32_addr sh_addr;
279 elf32_off sh_offset;
280 elf_word sh_size;
281 elf_word sh_link;
282 elf_word sh_info;
283 elf_word sh_addralign;
284 elf_word sh_entsize;
285};
286struct elf64_section_header {
287 elf_word sh_name;
288 elf_word sh_type;
289 elf_xword sh_flags;
290 elf64_addr sh_addr;
291 elf64_off sh_offset;
292 elf_xword sh_size;
293 elf_word sh_link;
294 elf_word sh_info;
295 elf_xword sh_addralign;
296 elf_xword sh_entsize;
297};
298
299/*
300 * ELF symbol table entry
301 */
302struct elf32_symbol {
303 elf_word st_name;
304 elf32_addr st_value;
305 elf_word st_size;
306 __u8 st_info;
307 __u8 st_other;
308 elf_half st_shndx;
309};
310struct elf64_symbol {
311 elf_word st_name;
312 __u8 st_info;
313 __u8 st_other;
314 elf_half st_shndx;
315 elf64_addr st_value;
316 elf_xword st_size;
317};
318
319#ifdef __32_BITS__
320typedef struct elf32_header elf_header_t;
321typedef struct elf32_segment_header elf_segment_header_t;
322typedef struct elf32_section_header elf_section_header_t;
323typedef struct elf32_symbol elf_symbol_t;
324#endif
325#ifdef __64_BITS__
326typedef struct elf64_header elf_header_t;
327typedef struct elf64_segment_header elf_segment_header_t;
328typedef struct elf64_section_header elf_section_header_t;
329typedef struct elf64_symbol elf_symbol_t;
330#endif
331
332extern int elf_load(elf_header_t *header, as_t * as);
333extern char *elf_error(int rc);
334
335#endif
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