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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>
David Woodhousef001e472006-04-27 00:11:01 +01005#include <linux/elf-em.h>
Kirill A. Shutemov6cc931b2008-02-07 00:15:55 -08006#ifdef __KERNEL__
Linus Torvalds1da177e2005-04-16 15:20:36 -07007#include <asm/elf.h>
Kirill A. Shutemov6cc931b2008-02-07 00:15:55 -08008#endif
Linus Torvalds1da177e2005-04-16 15:20:36 -07009
Andrew Morton6cf24f02006-12-06 20:41:39 -080010struct file;
11
Linus Torvalds1da177e2005-04-16 15:20:36 -070012#ifndef elf_read_implies_exec
13 /* Executables for which elf_read_implies_exec() returns TRUE will
14 have the READ_IMPLIES_EXEC personality flag set automatically.
15 Override in asm/elf.h as needed. */
16# define elf_read_implies_exec(ex, have_pt_gnu_stack) 0
17#endif
18
19/* 32-bit ELF base types. */
20typedef __u32 Elf32_Addr;
21typedef __u16 Elf32_Half;
22typedef __u32 Elf32_Off;
23typedef __s32 Elf32_Sword;
24typedef __u32 Elf32_Word;
25
26/* 64-bit ELF base types. */
27typedef __u64 Elf64_Addr;
28typedef __u16 Elf64_Half;
29typedef __s16 Elf64_SHalf;
30typedef __u64 Elf64_Off;
31typedef __s32 Elf64_Sword;
32typedef __u32 Elf64_Word;
33typedef __u64 Elf64_Xword;
34typedef __s64 Elf64_Sxword;
35
36/* These constants are for the segment types stored in the image headers */
37#define PT_NULL 0
38#define PT_LOAD 1
39#define PT_DYNAMIC 2
40#define PT_INTERP 3
41#define PT_NOTE 4
42#define PT_SHLIB 5
43#define PT_PHDR 6
44#define PT_TLS 7 /* Thread local storage segment */
45#define PT_LOOS 0x60000000 /* OS-specific */
46#define PT_HIOS 0x6fffffff /* OS-specific */
47#define PT_LOPROC 0x70000000
48#define PT_HIPROC 0x7fffffff
49#define PT_GNU_EH_FRAME 0x6474e550
50
51#define PT_GNU_STACK (PT_LOOS + 0x474e551)
52
Daisuke HATAYAMA8d9032b2010-03-05 13:44:10 -080053/*
54 * Extended Numbering
55 *
56 * If the real number of program header table entries is larger than
57 * or equal to PN_XNUM(0xffff), it is set to sh_info field of the
58 * section header at index 0, and PN_XNUM is set to e_phnum
59 * field. Otherwise, the section header at index 0 is zero
60 * initialized, if it exists.
61 *
62 * Specifications are available in:
63 *
64 * - Sun microsystems: Linker and Libraries.
65 * Part No: 817-1984-17, September 2008.
66 * URL: http://docs.sun.com/app/docs/doc/817-1984
67 *
68 * - System V ABI AMD64 Architecture Processor Supplement
69 * Draft Version 0.99.,
70 * May 11, 2009.
71 * URL: http://www.x86-64.org/
72 */
73#define PN_XNUM 0xffff
74
Linus Torvalds1da177e2005-04-16 15:20:36 -070075/* These constants define the different elf file types */
76#define ET_NONE 0
77#define ET_REL 1
78#define ET_EXEC 2
79#define ET_DYN 3
80#define ET_CORE 4
81#define ET_LOPROC 0xff00
82#define ET_HIPROC 0xffff
83
Linus Torvalds1da177e2005-04-16 15:20:36 -070084/* This is the info that is needed to parse the dynamic section of the file */
85#define DT_NULL 0
86#define DT_NEEDED 1
87#define DT_PLTRELSZ 2
88#define DT_PLTGOT 3
89#define DT_HASH 4
90#define DT_STRTAB 5
91#define DT_SYMTAB 6
92#define DT_RELA 7
93#define DT_RELASZ 8
94#define DT_RELAENT 9
95#define DT_STRSZ 10
96#define DT_SYMENT 11
97#define DT_INIT 12
98#define DT_FINI 13
99#define DT_SONAME 14
100#define DT_RPATH 15
101#define DT_SYMBOLIC 16
102#define DT_REL 17
103#define DT_RELSZ 18
104#define DT_RELENT 19
105#define DT_PLTREL 20
106#define DT_DEBUG 21
107#define DT_TEXTREL 22
108#define DT_JMPREL 23
Jeremy Fitzhardinged4f7a2c2007-05-02 19:27:12 +0200109#define DT_ENCODING 32
110#define OLD_DT_LOOS 0x60000000
111#define DT_LOOS 0x6000000d
112#define DT_HIOS 0x6ffff000
113#define DT_VALRNGLO 0x6ffffd00
114#define DT_VALRNGHI 0x6ffffdff
115#define DT_ADDRRNGLO 0x6ffffe00
116#define DT_ADDRRNGHI 0x6ffffeff
117#define DT_VERSYM 0x6ffffff0
118#define DT_RELACOUNT 0x6ffffff9
119#define DT_RELCOUNT 0x6ffffffa
120#define DT_FLAGS_1 0x6ffffffb
121#define DT_VERDEF 0x6ffffffc
122#define DT_VERDEFNUM 0x6ffffffd
123#define DT_VERNEED 0x6ffffffe
124#define DT_VERNEEDNUM 0x6fffffff
125#define OLD_DT_HIOS 0x6fffffff
Linus Torvalds1da177e2005-04-16 15:20:36 -0700126#define DT_LOPROC 0x70000000
127#define DT_HIPROC 0x7fffffff
128
129/* This info is needed when parsing the symbol table */
130#define STB_LOCAL 0
131#define STB_GLOBAL 1
132#define STB_WEAK 2
133
134#define STT_NOTYPE 0
135#define STT_OBJECT 1
136#define STT_FUNC 2
137#define STT_SECTION 3
138#define STT_FILE 4
Jan Beulichb3f3d612006-01-08 01:02:20 -0800139#define STT_COMMON 5
140#define STT_TLS 6
Linus Torvalds1da177e2005-04-16 15:20:36 -0700141
142#define ELF_ST_BIND(x) ((x) >> 4)
143#define ELF_ST_TYPE(x) (((unsigned int) x) & 0xf)
144#define ELF32_ST_BIND(x) ELF_ST_BIND(x)
145#define ELF32_ST_TYPE(x) ELF_ST_TYPE(x)
146#define ELF64_ST_BIND(x) ELF_ST_BIND(x)
147#define ELF64_ST_TYPE(x) ELF_ST_TYPE(x)
148
Linus Torvalds1da177e2005-04-16 15:20:36 -0700149typedef struct dynamic{
150 Elf32_Sword d_tag;
151 union{
152 Elf32_Sword d_val;
153 Elf32_Addr d_ptr;
154 } d_un;
155} Elf32_Dyn;
156
157typedef struct {
158 Elf64_Sxword d_tag; /* entry tag value */
159 union {
160 Elf64_Xword d_val;
161 Elf64_Addr d_ptr;
162 } d_un;
163} Elf64_Dyn;
164
165/* The following are used with relocations */
166#define ELF32_R_SYM(x) ((x) >> 8)
167#define ELF32_R_TYPE(x) ((x) & 0xff)
168
169#define ELF64_R_SYM(i) ((i) >> 32)
170#define ELF64_R_TYPE(i) ((i) & 0xffffffff)
171
172typedef struct elf32_rel {
173 Elf32_Addr r_offset;
174 Elf32_Word r_info;
175} Elf32_Rel;
176
177typedef struct elf64_rel {
178 Elf64_Addr r_offset; /* Location at which to apply the action */
179 Elf64_Xword r_info; /* index and type of relocation */
180} Elf64_Rel;
181
182typedef struct elf32_rela{
183 Elf32_Addr r_offset;
184 Elf32_Word r_info;
185 Elf32_Sword r_addend;
186} Elf32_Rela;
187
188typedef struct elf64_rela {
189 Elf64_Addr r_offset; /* Location at which to apply the action */
190 Elf64_Xword r_info; /* index and type of relocation */
191 Elf64_Sxword r_addend; /* Constant addend used to compute value */
192} Elf64_Rela;
193
194typedef struct elf32_sym{
195 Elf32_Word st_name;
196 Elf32_Addr st_value;
197 Elf32_Word st_size;
198 unsigned char st_info;
199 unsigned char st_other;
200 Elf32_Half st_shndx;
201} Elf32_Sym;
202
203typedef struct elf64_sym {
204 Elf64_Word st_name; /* Symbol name, index in string tbl */
205 unsigned char st_info; /* Type and binding attributes */
206 unsigned char st_other; /* No defined meaning, 0 */
207 Elf64_Half st_shndx; /* Associated section index */
208 Elf64_Addr st_value; /* Value of the symbol */
209 Elf64_Xword st_size; /* Associated symbol size */
210} Elf64_Sym;
211
212
213#define EI_NIDENT 16
214
215typedef struct elf32_hdr{
216 unsigned char e_ident[EI_NIDENT];
217 Elf32_Half e_type;
218 Elf32_Half e_machine;
219 Elf32_Word e_version;
220 Elf32_Addr e_entry; /* Entry point */
221 Elf32_Off e_phoff;
222 Elf32_Off e_shoff;
223 Elf32_Word e_flags;
224 Elf32_Half e_ehsize;
225 Elf32_Half e_phentsize;
226 Elf32_Half e_phnum;
227 Elf32_Half e_shentsize;
228 Elf32_Half e_shnum;
229 Elf32_Half e_shstrndx;
230} Elf32_Ehdr;
231
232typedef struct elf64_hdr {
Cyrill Gorcunoveb6900f2008-04-29 01:01:17 -0700233 unsigned char e_ident[EI_NIDENT]; /* ELF "magic number" */
Linus Torvalds1da177e2005-04-16 15:20:36 -0700234 Elf64_Half e_type;
235 Elf64_Half e_machine;
236 Elf64_Word e_version;
237 Elf64_Addr e_entry; /* Entry point virtual address */
238 Elf64_Off e_phoff; /* Program header table file offset */
239 Elf64_Off e_shoff; /* Section header table file offset */
240 Elf64_Word e_flags;
241 Elf64_Half e_ehsize;
242 Elf64_Half e_phentsize;
243 Elf64_Half e_phnum;
244 Elf64_Half e_shentsize;
245 Elf64_Half e_shnum;
246 Elf64_Half e_shstrndx;
247} Elf64_Ehdr;
248
249/* These constants define the permissions on sections in the program
250 header, p_flags. */
251#define PF_R 0x4
252#define PF_W 0x2
253#define PF_X 0x1
254
255typedef struct elf32_phdr{
256 Elf32_Word p_type;
257 Elf32_Off p_offset;
258 Elf32_Addr p_vaddr;
259 Elf32_Addr p_paddr;
260 Elf32_Word p_filesz;
261 Elf32_Word p_memsz;
262 Elf32_Word p_flags;
263 Elf32_Word p_align;
264} Elf32_Phdr;
265
266typedef struct elf64_phdr {
267 Elf64_Word p_type;
268 Elf64_Word p_flags;
269 Elf64_Off p_offset; /* Segment file offset */
270 Elf64_Addr p_vaddr; /* Segment virtual address */
271 Elf64_Addr p_paddr; /* Segment physical address */
272 Elf64_Xword p_filesz; /* Segment size in file */
273 Elf64_Xword p_memsz; /* Segment size in memory */
274 Elf64_Xword p_align; /* Segment alignment, file & memory */
275} Elf64_Phdr;
276
277/* sh_type */
278#define SHT_NULL 0
279#define SHT_PROGBITS 1
280#define SHT_SYMTAB 2
281#define SHT_STRTAB 3
282#define SHT_RELA 4
283#define SHT_HASH 5
284#define SHT_DYNAMIC 6
285#define SHT_NOTE 7
286#define SHT_NOBITS 8
287#define SHT_REL 9
288#define SHT_SHLIB 10
289#define SHT_DYNSYM 11
290#define SHT_NUM 12
291#define SHT_LOPROC 0x70000000
292#define SHT_HIPROC 0x7fffffff
293#define SHT_LOUSER 0x80000000
294#define SHT_HIUSER 0xffffffff
295
296/* sh_flags */
297#define SHF_WRITE 0x1
298#define SHF_ALLOC 0x2
299#define SHF_EXECINSTR 0x4
300#define SHF_MASKPROC 0xf0000000
301
302/* special section indexes */
303#define SHN_UNDEF 0
304#define SHN_LORESERVE 0xff00
305#define SHN_LOPROC 0xff00
306#define SHN_HIPROC 0xff1f
307#define SHN_ABS 0xfff1
308#define SHN_COMMON 0xfff2
309#define SHN_HIRESERVE 0xffff
310
Daisuke HATAYAMA8d9032b2010-03-05 13:44:10 -0800311typedef struct elf32_shdr {
Linus Torvalds1da177e2005-04-16 15:20:36 -0700312 Elf32_Word sh_name;
313 Elf32_Word sh_type;
314 Elf32_Word sh_flags;
315 Elf32_Addr sh_addr;
316 Elf32_Off sh_offset;
317 Elf32_Word sh_size;
318 Elf32_Word sh_link;
319 Elf32_Word sh_info;
320 Elf32_Word sh_addralign;
321 Elf32_Word sh_entsize;
322} Elf32_Shdr;
323
324typedef struct elf64_shdr {
325 Elf64_Word sh_name; /* Section name, index in string tbl */
326 Elf64_Word sh_type; /* Type of section */
327 Elf64_Xword sh_flags; /* Miscellaneous section attributes */
328 Elf64_Addr sh_addr; /* Section virtual addr at execution */
329 Elf64_Off sh_offset; /* Section file offset */
330 Elf64_Xword sh_size; /* Size of section in bytes */
331 Elf64_Word sh_link; /* Index of another section */
332 Elf64_Word sh_info; /* Additional section information */
333 Elf64_Xword sh_addralign; /* Section alignment */
334 Elf64_Xword sh_entsize; /* Entry size if section holds table */
335} Elf64_Shdr;
336
337#define EI_MAG0 0 /* e_ident[] indexes */
338#define EI_MAG1 1
339#define EI_MAG2 2
340#define EI_MAG3 3
341#define EI_CLASS 4
342#define EI_DATA 5
343#define EI_VERSION 6
344#define EI_OSABI 7
345#define EI_PAD 8
346
347#define ELFMAG0 0x7f /* EI_MAG */
348#define ELFMAG1 'E'
349#define ELFMAG2 'L'
350#define ELFMAG3 'F'
351#define ELFMAG "\177ELF"
352#define SELFMAG 4
353
354#define ELFCLASSNONE 0 /* EI_CLASS */
355#define ELFCLASS32 1
356#define ELFCLASS64 2
357#define ELFCLASSNUM 3
358
359#define ELFDATANONE 0 /* e_ident[EI_DATA] */
360#define ELFDATA2LSB 1
361#define ELFDATA2MSB 2
362
363#define EV_NONE 0 /* e_version, EI_VERSION */
364#define EV_CURRENT 1
365#define EV_NUM 2
366
367#define ELFOSABI_NONE 0
368#define ELFOSABI_LINUX 3
369
370#ifndef ELF_OSABI
371#define ELF_OSABI ELFOSABI_NONE
372#endif
373
Suresh Siddha2225a122010-02-11 11:51:00 -0800374/*
375 * Notes used in ET_CORE. Architectures export some of the arch register sets
376 * using the corresponding note types via the PTRACE_GETREGSET and
377 * PTRACE_SETREGSET requests.
378 */
Linus Torvalds1da177e2005-04-16 15:20:36 -0700379#define NT_PRSTATUS 1
380#define NT_PRFPREG 2
381#define NT_PRPSINFO 3
382#define NT_TASKSTRUCT 4
383#define NT_AUXV 6
384#define NT_PRXFPREG 0x46e62b7f /* copied from gdb5.1/include/elf/common.h */
Mark Nelson1f7d6662007-10-16 23:25:40 -0700385#define NT_PPC_VMX 0x100 /* PowerPC Altivec/VMX registers */
Roland McGrath24f1a842008-01-02 17:05:48 -0800386#define NT_PPC_SPE 0x101 /* PowerPC SPE/EVR registers */
Michael Neulingf3e909c2008-07-01 14:01:39 +1000387#define NT_PPC_VSX 0x102 /* PowerPC VSX registers */
Roland McGrathbb616822008-01-30 13:31:56 +0100388#define NT_386_TLS 0x200 /* i386 TLS slots (struct user_desc) */
Roland McGrath325af5f2008-08-08 15:58:39 -0700389#define NT_386_IOPERM 0x201 /* x86 io permission bitmap (1=deny) */
Suresh Siddha5b3efd52010-02-11 11:50:59 -0800390#define NT_X86_XSTATE 0x202 /* x86 extended state using xsave */
Martin Schwidefsky622e99b2009-12-18 17:43:20 +0100391#define NT_S390_HIGH_GPRS 0x300 /* s390 upper register halves */
Michael Holzheu73bfa5f2010-02-26 22:37:52 +0100392#define NT_S390_TIMER 0x301 /* s390 timer register */
393#define NT_S390_TODCMP 0x302 /* s390 TOD clock comparator register */
394#define NT_S390_TODPREG 0x303 /* s390 TOD programmable register */
395#define NT_S390_CTRS 0x304 /* s390 control registers */
396#define NT_S390_PREFIX 0x305 /* s390 prefix register */
Martin Schwidefsky86f25522010-05-17 10:00:05 +0200397#define NT_S390_LAST_BREAK 0x306 /* s390 breaking event address */
Dave Martin4c3b5122011-04-18 14:48:22 +0100398#define NT_ARM_VFP 0x400 /* ARM VFP/NEON registers */
Linus Torvalds1da177e2005-04-16 15:20:36 -0700399
400
401/* Note header in a PT_NOTE section */
402typedef struct elf32_note {
403 Elf32_Word n_namesz; /* Name size */
404 Elf32_Word n_descsz; /* Content size */
405 Elf32_Word n_type; /* Content type */
406} Elf32_Nhdr;
407
408/* Note header in a PT_NOTE section */
409typedef struct elf64_note {
410 Elf64_Word n_namesz; /* Name size */
411 Elf64_Word n_descsz; /* Content size */
412 Elf64_Word n_type; /* Content type */
413} Elf64_Nhdr;
414
Jaswinder Singh Rajputf4aa1c32009-01-30 21:05:50 +0530415#ifdef __KERNEL__
Linus Torvalds1da177e2005-04-16 15:20:36 -0700416#if ELF_CLASS == ELFCLASS32
417
418extern Elf32_Dyn _DYNAMIC [];
419#define elfhdr elf32_hdr
420#define elf_phdr elf32_phdr
Daisuke HATAYAMA8d9032b2010-03-05 13:44:10 -0800421#define elf_shdr elf32_shdr
Linus Torvalds1da177e2005-04-16 15:20:36 -0700422#define elf_note elf32_note
Magnus Damm386d9a72006-12-06 20:37:53 -0800423#define elf_addr_t Elf32_Off
Daisuke HATAYAMA1fcccba2010-03-05 13:44:07 -0800424#define Elf_Half Elf32_Half
Linus Torvalds1da177e2005-04-16 15:20:36 -0700425
426#else
427
428extern Elf64_Dyn _DYNAMIC [];
429#define elfhdr elf64_hdr
430#define elf_phdr elf64_phdr
Daisuke HATAYAMA8d9032b2010-03-05 13:44:10 -0800431#define elf_shdr elf64_shdr
Linus Torvalds1da177e2005-04-16 15:20:36 -0700432#define elf_note elf64_note
Magnus Damm386d9a72006-12-06 20:37:53 -0800433#define elf_addr_t Elf64_Off
Daisuke HATAYAMA1fcccba2010-03-05 13:44:07 -0800434#define Elf_Half Elf64_Half
Linus Torvalds1da177e2005-04-16 15:20:36 -0700435
436#endif
437
Michael Ellermane5501492007-09-19 14:38:12 +1000438/* Optional callbacks to write extra ELF notes. */
Dwayne Grant McConnellbf1ab972006-11-23 00:46:37 +0100439#ifndef ARCH_HAVE_EXTRA_ELF_NOTES
Michael Ellermane5501492007-09-19 14:38:12 +1000440static inline int elf_coredump_extra_notes_size(void) { return 0; }
441static inline int elf_coredump_extra_notes_write(struct file *file,
442 loff_t *foffset) { return 0; }
443#else
444extern int elf_coredump_extra_notes_size(void);
445extern int elf_coredump_extra_notes_write(struct file *file, loff_t *foffset);
446#endif
Jaswinder Singh Rajputf4aa1c32009-01-30 21:05:50 +0530447#endif /* __KERNEL__ */
Linus Torvalds1da177e2005-04-16 15:20:36 -0700448#endif /* _LINUX_ELF_H */