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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
Jeremy Fitzhardinged4f7a2c2007-05-02 19:27:12 +020086#define DT_ENCODING 32
87#define OLD_DT_LOOS 0x60000000
88#define DT_LOOS 0x6000000d
89#define DT_HIOS 0x6ffff000
90#define DT_VALRNGLO 0x6ffffd00
91#define DT_VALRNGHI 0x6ffffdff
92#define DT_ADDRRNGLO 0x6ffffe00
93#define DT_ADDRRNGHI 0x6ffffeff
94#define DT_VERSYM 0x6ffffff0
95#define DT_RELACOUNT 0x6ffffff9
96#define DT_RELCOUNT 0x6ffffffa
97#define DT_FLAGS_1 0x6ffffffb
98#define DT_VERDEF 0x6ffffffc
99#define DT_VERDEFNUM 0x6ffffffd
100#define DT_VERNEED 0x6ffffffe
101#define DT_VERNEEDNUM 0x6fffffff
102#define OLD_DT_HIOS 0x6fffffff
Linus Torvalds1da177e2005-04-16 15:20:36 -0700103#define DT_LOPROC 0x70000000
104#define DT_HIPROC 0x7fffffff
105
106/* This info is needed when parsing the symbol table */
107#define STB_LOCAL 0
108#define STB_GLOBAL 1
109#define STB_WEAK 2
110
111#define STT_NOTYPE 0
112#define STT_OBJECT 1
113#define STT_FUNC 2
114#define STT_SECTION 3
115#define STT_FILE 4
Jan Beulichb3f3d612006-01-08 01:02:20 -0800116#define STT_COMMON 5
117#define STT_TLS 6
Linus Torvalds1da177e2005-04-16 15:20:36 -0700118
119#define ELF_ST_BIND(x) ((x) >> 4)
120#define ELF_ST_TYPE(x) (((unsigned int) x) & 0xf)
121#define ELF32_ST_BIND(x) ELF_ST_BIND(x)
122#define ELF32_ST_TYPE(x) ELF_ST_TYPE(x)
123#define ELF64_ST_BIND(x) ELF_ST_BIND(x)
124#define ELF64_ST_TYPE(x) ELF_ST_TYPE(x)
125
Linus Torvalds1da177e2005-04-16 15:20:36 -0700126typedef struct dynamic{
127 Elf32_Sword d_tag;
128 union{
129 Elf32_Sword d_val;
130 Elf32_Addr d_ptr;
131 } d_un;
132} Elf32_Dyn;
133
134typedef struct {
135 Elf64_Sxword d_tag; /* entry tag value */
136 union {
137 Elf64_Xword d_val;
138 Elf64_Addr d_ptr;
139 } d_un;
140} Elf64_Dyn;
141
142/* The following are used with relocations */
143#define ELF32_R_SYM(x) ((x) >> 8)
144#define ELF32_R_TYPE(x) ((x) & 0xff)
145
146#define ELF64_R_SYM(i) ((i) >> 32)
147#define ELF64_R_TYPE(i) ((i) & 0xffffffff)
148
149typedef struct elf32_rel {
150 Elf32_Addr r_offset;
151 Elf32_Word r_info;
152} Elf32_Rel;
153
154typedef struct elf64_rel {
155 Elf64_Addr r_offset; /* Location at which to apply the action */
156 Elf64_Xword r_info; /* index and type of relocation */
157} Elf64_Rel;
158
159typedef struct elf32_rela{
160 Elf32_Addr r_offset;
161 Elf32_Word r_info;
162 Elf32_Sword r_addend;
163} Elf32_Rela;
164
165typedef struct elf64_rela {
166 Elf64_Addr r_offset; /* Location at which to apply the action */
167 Elf64_Xword r_info; /* index and type of relocation */
168 Elf64_Sxword r_addend; /* Constant addend used to compute value */
169} Elf64_Rela;
170
171typedef struct elf32_sym{
172 Elf32_Word st_name;
173 Elf32_Addr st_value;
174 Elf32_Word st_size;
175 unsigned char st_info;
176 unsigned char st_other;
177 Elf32_Half st_shndx;
178} Elf32_Sym;
179
180typedef struct elf64_sym {
181 Elf64_Word st_name; /* Symbol name, index in string tbl */
182 unsigned char st_info; /* Type and binding attributes */
183 unsigned char st_other; /* No defined meaning, 0 */
184 Elf64_Half st_shndx; /* Associated section index */
185 Elf64_Addr st_value; /* Value of the symbol */
186 Elf64_Xword st_size; /* Associated symbol size */
187} Elf64_Sym;
188
189
190#define EI_NIDENT 16
191
192typedef struct elf32_hdr{
193 unsigned char e_ident[EI_NIDENT];
194 Elf32_Half e_type;
195 Elf32_Half e_machine;
196 Elf32_Word e_version;
197 Elf32_Addr e_entry; /* Entry point */
198 Elf32_Off e_phoff;
199 Elf32_Off e_shoff;
200 Elf32_Word e_flags;
201 Elf32_Half e_ehsize;
202 Elf32_Half e_phentsize;
203 Elf32_Half e_phnum;
204 Elf32_Half e_shentsize;
205 Elf32_Half e_shnum;
206 Elf32_Half e_shstrndx;
207} Elf32_Ehdr;
208
209typedef struct elf64_hdr {
210 unsigned char e_ident[16]; /* ELF "magic number" */
211 Elf64_Half e_type;
212 Elf64_Half e_machine;
213 Elf64_Word e_version;
214 Elf64_Addr e_entry; /* Entry point virtual address */
215 Elf64_Off e_phoff; /* Program header table file offset */
216 Elf64_Off e_shoff; /* Section header table file offset */
217 Elf64_Word e_flags;
218 Elf64_Half e_ehsize;
219 Elf64_Half e_phentsize;
220 Elf64_Half e_phnum;
221 Elf64_Half e_shentsize;
222 Elf64_Half e_shnum;
223 Elf64_Half e_shstrndx;
224} Elf64_Ehdr;
225
226/* These constants define the permissions on sections in the program
227 header, p_flags. */
228#define PF_R 0x4
229#define PF_W 0x2
230#define PF_X 0x1
231
232typedef struct elf32_phdr{
233 Elf32_Word p_type;
234 Elf32_Off p_offset;
235 Elf32_Addr p_vaddr;
236 Elf32_Addr p_paddr;
237 Elf32_Word p_filesz;
238 Elf32_Word p_memsz;
239 Elf32_Word p_flags;
240 Elf32_Word p_align;
241} Elf32_Phdr;
242
243typedef struct elf64_phdr {
244 Elf64_Word p_type;
245 Elf64_Word p_flags;
246 Elf64_Off p_offset; /* Segment file offset */
247 Elf64_Addr p_vaddr; /* Segment virtual address */
248 Elf64_Addr p_paddr; /* Segment physical address */
249 Elf64_Xword p_filesz; /* Segment size in file */
250 Elf64_Xword p_memsz; /* Segment size in memory */
251 Elf64_Xword p_align; /* Segment alignment, file & memory */
252} Elf64_Phdr;
253
254/* sh_type */
255#define SHT_NULL 0
256#define SHT_PROGBITS 1
257#define SHT_SYMTAB 2
258#define SHT_STRTAB 3
259#define SHT_RELA 4
260#define SHT_HASH 5
261#define SHT_DYNAMIC 6
262#define SHT_NOTE 7
263#define SHT_NOBITS 8
264#define SHT_REL 9
265#define SHT_SHLIB 10
266#define SHT_DYNSYM 11
267#define SHT_NUM 12
268#define SHT_LOPROC 0x70000000
269#define SHT_HIPROC 0x7fffffff
270#define SHT_LOUSER 0x80000000
271#define SHT_HIUSER 0xffffffff
272
273/* sh_flags */
274#define SHF_WRITE 0x1
275#define SHF_ALLOC 0x2
276#define SHF_EXECINSTR 0x4
277#define SHF_MASKPROC 0xf0000000
278
279/* special section indexes */
280#define SHN_UNDEF 0
281#define SHN_LORESERVE 0xff00
282#define SHN_LOPROC 0xff00
283#define SHN_HIPROC 0xff1f
284#define SHN_ABS 0xfff1
285#define SHN_COMMON 0xfff2
286#define SHN_HIRESERVE 0xffff
287
288typedef struct {
289 Elf32_Word sh_name;
290 Elf32_Word sh_type;
291 Elf32_Word sh_flags;
292 Elf32_Addr sh_addr;
293 Elf32_Off sh_offset;
294 Elf32_Word sh_size;
295 Elf32_Word sh_link;
296 Elf32_Word sh_info;
297 Elf32_Word sh_addralign;
298 Elf32_Word sh_entsize;
299} Elf32_Shdr;
300
301typedef struct elf64_shdr {
302 Elf64_Word sh_name; /* Section name, index in string tbl */
303 Elf64_Word sh_type; /* Type of section */
304 Elf64_Xword sh_flags; /* Miscellaneous section attributes */
305 Elf64_Addr sh_addr; /* Section virtual addr at execution */
306 Elf64_Off sh_offset; /* Section file offset */
307 Elf64_Xword sh_size; /* Size of section in bytes */
308 Elf64_Word sh_link; /* Index of another section */
309 Elf64_Word sh_info; /* Additional section information */
310 Elf64_Xword sh_addralign; /* Section alignment */
311 Elf64_Xword sh_entsize; /* Entry size if section holds table */
312} Elf64_Shdr;
313
314#define EI_MAG0 0 /* e_ident[] indexes */
315#define EI_MAG1 1
316#define EI_MAG2 2
317#define EI_MAG3 3
318#define EI_CLASS 4
319#define EI_DATA 5
320#define EI_VERSION 6
321#define EI_OSABI 7
322#define EI_PAD 8
323
324#define ELFMAG0 0x7f /* EI_MAG */
325#define ELFMAG1 'E'
326#define ELFMAG2 'L'
327#define ELFMAG3 'F'
328#define ELFMAG "\177ELF"
329#define SELFMAG 4
330
331#define ELFCLASSNONE 0 /* EI_CLASS */
332#define ELFCLASS32 1
333#define ELFCLASS64 2
334#define ELFCLASSNUM 3
335
336#define ELFDATANONE 0 /* e_ident[EI_DATA] */
337#define ELFDATA2LSB 1
338#define ELFDATA2MSB 2
339
340#define EV_NONE 0 /* e_version, EI_VERSION */
341#define EV_CURRENT 1
342#define EV_NUM 2
343
344#define ELFOSABI_NONE 0
345#define ELFOSABI_LINUX 3
346
347#ifndef ELF_OSABI
348#define ELF_OSABI ELFOSABI_NONE
349#endif
350
351/* Notes used in ET_CORE */
352#define NT_PRSTATUS 1
353#define NT_PRFPREG 2
354#define NT_PRPSINFO 3
355#define NT_TASKSTRUCT 4
356#define NT_AUXV 6
357#define NT_PRXFPREG 0x46e62b7f /* copied from gdb5.1/include/elf/common.h */
358
359
360/* Note header in a PT_NOTE section */
361typedef struct elf32_note {
362 Elf32_Word n_namesz; /* Name size */
363 Elf32_Word n_descsz; /* Content size */
364 Elf32_Word n_type; /* Content type */
365} Elf32_Nhdr;
366
367/* Note header in a PT_NOTE section */
368typedef struct elf64_note {
369 Elf64_Word n_namesz; /* Name size */
370 Elf64_Word n_descsz; /* Content size */
371 Elf64_Word n_type; /* Content type */
372} Elf64_Nhdr;
373
374#if ELF_CLASS == ELFCLASS32
375
376extern Elf32_Dyn _DYNAMIC [];
377#define elfhdr elf32_hdr
378#define elf_phdr elf32_phdr
379#define elf_note elf32_note
Magnus Damm386d9a72006-12-06 20:37:53 -0800380#define elf_addr_t Elf32_Off
Linus Torvalds1da177e2005-04-16 15:20:36 -0700381
382#else
383
384extern Elf64_Dyn _DYNAMIC [];
385#define elfhdr elf64_hdr
386#define elf_phdr elf64_phdr
387#define elf_note elf64_note
Magnus Damm386d9a72006-12-06 20:37:53 -0800388#define elf_addr_t Elf64_Off
Linus Torvalds1da177e2005-04-16 15:20:36 -0700389
390#endif
391
Michael Ellermane5501492007-09-19 14:38:12 +1000392/* Optional callbacks to write extra ELF notes. */
Dwayne Grant McConnellbf1ab972006-11-23 00:46:37 +0100393#ifndef ARCH_HAVE_EXTRA_ELF_NOTES
Michael Ellermane5501492007-09-19 14:38:12 +1000394static inline int elf_coredump_extra_notes_size(void) { return 0; }
395static inline int elf_coredump_extra_notes_write(struct file *file,
396 loff_t *foffset) { return 0; }
397#else
398extern int elf_coredump_extra_notes_size(void);
399extern int elf_coredump_extra_notes_write(struct file *file, loff_t *foffset);
400#endif
Linus Torvalds1da177e2005-04-16 15:20:36 -0700401
402#endif /* _LINUX_ELF_H */