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Linus Torvalds1da177e2005-04-16 15:20:36 -07001#ifndef _LINUX_ELF_H
2#define _LINUX_ELF_H
3
4#include <linux/types.h>
H. J. Lu36d57ac2005-09-06 15:16:49 -07005#include <linux/auxvec.h>
David Woodhousef001e472006-04-27 00:11:01 +01006#include <linux/elf-em.h>
Linus Torvalds1da177e2005-04-16 15:20:36 -07007#include <asm/elf.h>
8
Andrew Morton6cf24f02006-12-06 20:41:39 -08009struct file;
10
Linus Torvalds1da177e2005-04-16 15:20:36 -070011#ifndef elf_read_implies_exec
12 /* Executables for which elf_read_implies_exec() returns TRUE will
13 have the READ_IMPLIES_EXEC personality flag set automatically.
14 Override in asm/elf.h as needed. */
15# define elf_read_implies_exec(ex, have_pt_gnu_stack) 0
16#endif
17
18/* 32-bit ELF base types. */
19typedef __u32 Elf32_Addr;
20typedef __u16 Elf32_Half;
21typedef __u32 Elf32_Off;
22typedef __s32 Elf32_Sword;
23typedef __u32 Elf32_Word;
24
25/* 64-bit ELF base types. */
26typedef __u64 Elf64_Addr;
27typedef __u16 Elf64_Half;
28typedef __s16 Elf64_SHalf;
29typedef __u64 Elf64_Off;
30typedef __s32 Elf64_Sword;
31typedef __u32 Elf64_Word;
32typedef __u64 Elf64_Xword;
33typedef __s64 Elf64_Sxword;
34
35/* These constants are for the segment types stored in the image headers */
36#define PT_NULL 0
37#define PT_LOAD 1
38#define PT_DYNAMIC 2
39#define PT_INTERP 3
40#define PT_NOTE 4
41#define PT_SHLIB 5
42#define PT_PHDR 6
43#define PT_TLS 7 /* Thread local storage segment */
44#define PT_LOOS 0x60000000 /* OS-specific */
45#define PT_HIOS 0x6fffffff /* OS-specific */
46#define PT_LOPROC 0x70000000
47#define PT_HIPROC 0x7fffffff
48#define PT_GNU_EH_FRAME 0x6474e550
49
50#define PT_GNU_STACK (PT_LOOS + 0x474e551)
51
52/* These constants define the different elf file types */
53#define ET_NONE 0
54#define ET_REL 1
55#define ET_EXEC 2
56#define ET_DYN 3
57#define ET_CORE 4
58#define ET_LOPROC 0xff00
59#define ET_HIPROC 0xffff
60
Linus Torvalds1da177e2005-04-16 15:20:36 -070061/* This is the info that is needed to parse the dynamic section of the file */
62#define DT_NULL 0
63#define DT_NEEDED 1
64#define DT_PLTRELSZ 2
65#define DT_PLTGOT 3
66#define DT_HASH 4
67#define DT_STRTAB 5
68#define DT_SYMTAB 6
69#define DT_RELA 7
70#define DT_RELASZ 8
71#define DT_RELAENT 9
72#define DT_STRSZ 10
73#define DT_SYMENT 11
74#define DT_INIT 12
75#define DT_FINI 13
76#define DT_SONAME 14
77#define DT_RPATH 15
78#define DT_SYMBOLIC 16
79#define DT_REL 17
80#define DT_RELSZ 18
81#define DT_RELENT 19
82#define DT_PLTREL 20
83#define DT_DEBUG 21
84#define DT_TEXTREL 22
85#define DT_JMPREL 23
86#define DT_LOPROC 0x70000000
87#define DT_HIPROC 0x7fffffff
88
89/* This info is needed when parsing the symbol table */
90#define STB_LOCAL 0
91#define STB_GLOBAL 1
92#define STB_WEAK 2
93
94#define STT_NOTYPE 0
95#define STT_OBJECT 1
96#define STT_FUNC 2
97#define STT_SECTION 3
98#define STT_FILE 4
Jan Beulichb3f3d612006-01-08 01:02:20 -080099#define STT_COMMON 5
100#define STT_TLS 6
Linus Torvalds1da177e2005-04-16 15:20:36 -0700101
102#define ELF_ST_BIND(x) ((x) >> 4)
103#define ELF_ST_TYPE(x) (((unsigned int) x) & 0xf)
104#define ELF32_ST_BIND(x) ELF_ST_BIND(x)
105#define ELF32_ST_TYPE(x) ELF_ST_TYPE(x)
106#define ELF64_ST_BIND(x) ELF_ST_BIND(x)
107#define ELF64_ST_TYPE(x) ELF_ST_TYPE(x)
108
Linus Torvalds1da177e2005-04-16 15:20:36 -0700109typedef struct dynamic{
110 Elf32_Sword d_tag;
111 union{
112 Elf32_Sword d_val;
113 Elf32_Addr d_ptr;
114 } d_un;
115} Elf32_Dyn;
116
117typedef struct {
118 Elf64_Sxword d_tag; /* entry tag value */
119 union {
120 Elf64_Xword d_val;
121 Elf64_Addr d_ptr;
122 } d_un;
123} Elf64_Dyn;
124
125/* The following are used with relocations */
126#define ELF32_R_SYM(x) ((x) >> 8)
127#define ELF32_R_TYPE(x) ((x) & 0xff)
128
129#define ELF64_R_SYM(i) ((i) >> 32)
130#define ELF64_R_TYPE(i) ((i) & 0xffffffff)
131
132typedef struct elf32_rel {
133 Elf32_Addr r_offset;
134 Elf32_Word r_info;
135} Elf32_Rel;
136
137typedef struct elf64_rel {
138 Elf64_Addr r_offset; /* Location at which to apply the action */
139 Elf64_Xword r_info; /* index and type of relocation */
140} Elf64_Rel;
141
142typedef struct elf32_rela{
143 Elf32_Addr r_offset;
144 Elf32_Word r_info;
145 Elf32_Sword r_addend;
146} Elf32_Rela;
147
148typedef struct elf64_rela {
149 Elf64_Addr r_offset; /* Location at which to apply the action */
150 Elf64_Xword r_info; /* index and type of relocation */
151 Elf64_Sxword r_addend; /* Constant addend used to compute value */
152} Elf64_Rela;
153
154typedef struct elf32_sym{
155 Elf32_Word st_name;
156 Elf32_Addr st_value;
157 Elf32_Word st_size;
158 unsigned char st_info;
159 unsigned char st_other;
160 Elf32_Half st_shndx;
161} Elf32_Sym;
162
163typedef struct elf64_sym {
164 Elf64_Word st_name; /* Symbol name, index in string tbl */
165 unsigned char st_info; /* Type and binding attributes */
166 unsigned char st_other; /* No defined meaning, 0 */
167 Elf64_Half st_shndx; /* Associated section index */
168 Elf64_Addr st_value; /* Value of the symbol */
169 Elf64_Xword st_size; /* Associated symbol size */
170} Elf64_Sym;
171
172
173#define EI_NIDENT 16
174
175typedef struct elf32_hdr{
176 unsigned char e_ident[EI_NIDENT];
177 Elf32_Half e_type;
178 Elf32_Half e_machine;
179 Elf32_Word e_version;
180 Elf32_Addr e_entry; /* Entry point */
181 Elf32_Off e_phoff;
182 Elf32_Off e_shoff;
183 Elf32_Word e_flags;
184 Elf32_Half e_ehsize;
185 Elf32_Half e_phentsize;
186 Elf32_Half e_phnum;
187 Elf32_Half e_shentsize;
188 Elf32_Half e_shnum;
189 Elf32_Half e_shstrndx;
190} Elf32_Ehdr;
191
192typedef struct elf64_hdr {
193 unsigned char e_ident[16]; /* ELF "magic number" */
194 Elf64_Half e_type;
195 Elf64_Half e_machine;
196 Elf64_Word e_version;
197 Elf64_Addr e_entry; /* Entry point virtual address */
198 Elf64_Off e_phoff; /* Program header table file offset */
199 Elf64_Off e_shoff; /* Section header table file offset */
200 Elf64_Word e_flags;
201 Elf64_Half e_ehsize;
202 Elf64_Half e_phentsize;
203 Elf64_Half e_phnum;
204 Elf64_Half e_shentsize;
205 Elf64_Half e_shnum;
206 Elf64_Half e_shstrndx;
207} Elf64_Ehdr;
208
209/* These constants define the permissions on sections in the program
210 header, p_flags. */
211#define PF_R 0x4
212#define PF_W 0x2
213#define PF_X 0x1
214
215typedef struct elf32_phdr{
216 Elf32_Word p_type;
217 Elf32_Off p_offset;
218 Elf32_Addr p_vaddr;
219 Elf32_Addr p_paddr;
220 Elf32_Word p_filesz;
221 Elf32_Word p_memsz;
222 Elf32_Word p_flags;
223 Elf32_Word p_align;
224} Elf32_Phdr;
225
226typedef struct elf64_phdr {
227 Elf64_Word p_type;
228 Elf64_Word p_flags;
229 Elf64_Off p_offset; /* Segment file offset */
230 Elf64_Addr p_vaddr; /* Segment virtual address */
231 Elf64_Addr p_paddr; /* Segment physical address */
232 Elf64_Xword p_filesz; /* Segment size in file */
233 Elf64_Xword p_memsz; /* Segment size in memory */
234 Elf64_Xword p_align; /* Segment alignment, file & memory */
235} Elf64_Phdr;
236
237/* sh_type */
238#define SHT_NULL 0
239#define SHT_PROGBITS 1
240#define SHT_SYMTAB 2
241#define SHT_STRTAB 3
242#define SHT_RELA 4
243#define SHT_HASH 5
244#define SHT_DYNAMIC 6
245#define SHT_NOTE 7
246#define SHT_NOBITS 8
247#define SHT_REL 9
248#define SHT_SHLIB 10
249#define SHT_DYNSYM 11
250#define SHT_NUM 12
251#define SHT_LOPROC 0x70000000
252#define SHT_HIPROC 0x7fffffff
253#define SHT_LOUSER 0x80000000
254#define SHT_HIUSER 0xffffffff
255
256/* sh_flags */
257#define SHF_WRITE 0x1
258#define SHF_ALLOC 0x2
259#define SHF_EXECINSTR 0x4
260#define SHF_MASKPROC 0xf0000000
261
262/* special section indexes */
263#define SHN_UNDEF 0
264#define SHN_LORESERVE 0xff00
265#define SHN_LOPROC 0xff00
266#define SHN_HIPROC 0xff1f
267#define SHN_ABS 0xfff1
268#define SHN_COMMON 0xfff2
269#define SHN_HIRESERVE 0xffff
270
271typedef struct {
272 Elf32_Word sh_name;
273 Elf32_Word sh_type;
274 Elf32_Word sh_flags;
275 Elf32_Addr sh_addr;
276 Elf32_Off sh_offset;
277 Elf32_Word sh_size;
278 Elf32_Word sh_link;
279 Elf32_Word sh_info;
280 Elf32_Word sh_addralign;
281 Elf32_Word sh_entsize;
282} Elf32_Shdr;
283
284typedef struct elf64_shdr {
285 Elf64_Word sh_name; /* Section name, index in string tbl */
286 Elf64_Word sh_type; /* Type of section */
287 Elf64_Xword sh_flags; /* Miscellaneous section attributes */
288 Elf64_Addr sh_addr; /* Section virtual addr at execution */
289 Elf64_Off sh_offset; /* Section file offset */
290 Elf64_Xword sh_size; /* Size of section in bytes */
291 Elf64_Word sh_link; /* Index of another section */
292 Elf64_Word sh_info; /* Additional section information */
293 Elf64_Xword sh_addralign; /* Section alignment */
294 Elf64_Xword sh_entsize; /* Entry size if section holds table */
295} Elf64_Shdr;
296
297#define EI_MAG0 0 /* e_ident[] indexes */
298#define EI_MAG1 1
299#define EI_MAG2 2
300#define EI_MAG3 3
301#define EI_CLASS 4
302#define EI_DATA 5
303#define EI_VERSION 6
304#define EI_OSABI 7
305#define EI_PAD 8
306
307#define ELFMAG0 0x7f /* EI_MAG */
308#define ELFMAG1 'E'
309#define ELFMAG2 'L'
310#define ELFMAG3 'F'
311#define ELFMAG "\177ELF"
312#define SELFMAG 4
313
314#define ELFCLASSNONE 0 /* EI_CLASS */
315#define ELFCLASS32 1
316#define ELFCLASS64 2
317#define ELFCLASSNUM 3
318
319#define ELFDATANONE 0 /* e_ident[EI_DATA] */
320#define ELFDATA2LSB 1
321#define ELFDATA2MSB 2
322
323#define EV_NONE 0 /* e_version, EI_VERSION */
324#define EV_CURRENT 1
325#define EV_NUM 2
326
327#define ELFOSABI_NONE 0
328#define ELFOSABI_LINUX 3
329
330#ifndef ELF_OSABI
331#define ELF_OSABI ELFOSABI_NONE
332#endif
333
334/* Notes used in ET_CORE */
335#define NT_PRSTATUS 1
336#define NT_PRFPREG 2
337#define NT_PRPSINFO 3
338#define NT_TASKSTRUCT 4
339#define NT_AUXV 6
340#define NT_PRXFPREG 0x46e62b7f /* copied from gdb5.1/include/elf/common.h */
341
342
343/* Note header in a PT_NOTE section */
344typedef struct elf32_note {
345 Elf32_Word n_namesz; /* Name size */
346 Elf32_Word n_descsz; /* Content size */
347 Elf32_Word n_type; /* Content type */
348} Elf32_Nhdr;
349
350/* Note header in a PT_NOTE section */
351typedef struct elf64_note {
352 Elf64_Word n_namesz; /* Name size */
353 Elf64_Word n_descsz; /* Content size */
354 Elf64_Word n_type; /* Content type */
355} Elf64_Nhdr;
356
357#if ELF_CLASS == ELFCLASS32
358
359extern Elf32_Dyn _DYNAMIC [];
360#define elfhdr elf32_hdr
361#define elf_phdr elf32_phdr
362#define elf_note elf32_note
Magnus Damm386d9a72006-12-06 20:37:53 -0800363#define elf_addr_t Elf32_Off
Linus Torvalds1da177e2005-04-16 15:20:36 -0700364
365#else
366
367extern Elf64_Dyn _DYNAMIC [];
368#define elfhdr elf64_hdr
369#define elf_phdr elf64_phdr
370#define elf_note elf64_note
Magnus Damm386d9a72006-12-06 20:37:53 -0800371#define elf_addr_t Elf64_Off
Linus Torvalds1da177e2005-04-16 15:20:36 -0700372
373#endif
374
Dwayne Grant McConnellbf1ab972006-11-23 00:46:37 +0100375#ifndef ARCH_HAVE_EXTRA_ELF_NOTES
376static inline int arch_notes_size(void) { return 0; }
377static inline void arch_write_notes(struct file *file) { }
378
379#define ELF_CORE_EXTRA_NOTES_SIZE arch_notes_size()
380#define ELF_CORE_WRITE_EXTRA_NOTES arch_write_notes(file)
381#endif /* ARCH_HAVE_EXTRA_ELF_NOTES */
Linus Torvalds1da177e2005-04-16 15:20:36 -0700382
383#endif /* _LINUX_ELF_H */