summaryrefslogtreecommitdiff
path: root/include/uapi/linux/elf.h
blob: c58627c0d6fb07843f8f50582708011b8f0b87d7 (plain)
1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
17
18
19
20
21
22
23
24
25
26
27
28
29
30
31
32
33
34
35
36
37
38
39
40
41
42
43
44
45
46
47
48
49
50
51
52
53
54
55
56
57
58
59
60
61
62
63
64
65
66
67
68
69
70
71
72
73
74
75
76
77
78
79
80
81
82
83
84
85
86
87
88
89
90
91
92
93
94
95
96
97
98
99
100
101
102
103
104
105
106
107
108
109
110
111
112
113
114
115
116
117
118
119
120
121
122
123
124
125
126
127
128
129
130
131
132
133
134
135
136
137
138
139
140
141
142
143
144
145
146
147
148
149
150
151
152
153
154
155
156
157
158
159
160
161
162
163
164
165
166
167
168
169
170
171
172
173
174
175
176
177
178
179
180
181
182
183
184
185
186
187
188
189
190
191
192
193
194
195
196
197
198
199
200
201
202
203
204
205
206
207
208
209
210
211
212
213
214
215
216
217
218
219
220
221
222
223
224
225
226
227
228
229
230
231
232
233
234
235
236
237
238
239
240
241
242
243
244
245
246
247
248
249
250
251
252
253
254
255
256
257
258
259
260
261
262
263
264
265
266
267
268
269
270
271
272
273
274
275
276
277
278
279
280
281
282
283
284
285
286
287
288
289
290
291
292
293
294
295
296
297
298
299
300
301
302
303
304
305
306
307
308
309
310
311
312
313
314
315
316
317
318
319
320
321
322
323
324
325
326
327
328
329
330
331
332
333
334
335
336
337
338
339
340
341
342
343
344
345
346
347
348
349
350
351
352
353
354
355
356
357
358
359
360
361
362
363
364
365
366
367
368
369
370
371
372
373
374
375
376
377
378
379
380
381
382
383
384
385
386
387
388
389
390
391
392
393
394
395
396
397
398
399
400
401
402
403
404
405
406
407
408
409
410
411
412
413
414
415
416
417
418
419
420
421
422
423
424
425
426
427
428
429
430
431
432
433
434
435
436
437
438
439
/* SPDX-License-Identifier: GPL-2.0 WITH Linux-syscall-note */
#ifndef _UAPI_LINUX_ELF_H
#define _UAPI_LINUX_ELF_H

#include <linux/types.h>
#include <linux/elf-em.h>

/* 32-bit ELF base types. */
typedef __u32	Elf32_Addr;
typedef __u16	Elf32_Half;
typedef __u32	Elf32_Off;
typedef __s32	Elf32_Sword;
typedef __u32	Elf32_Word;

/* 64-bit ELF base types. */
typedef __u64	Elf64_Addr;
typedef __u16	Elf64_Half;
typedef __s16	Elf64_SHalf;
typedef __u64	Elf64_Off;
typedef __s32	Elf64_Sword;
typedef __u32	Elf64_Word;
typedef __u64	Elf64_Xword;
typedef __s64	Elf64_Sxword;

/* These constants are for the segment types stored in the image headers */
#define PT_NULL    0
#define PT_LOAD    1
#define PT_DYNAMIC 2
#define PT_INTERP  3
#define PT_NOTE    4
#define PT_SHLIB   5
#define PT_PHDR    6
#define PT_TLS     7               /* Thread local storage segment */
#define PT_LOOS    0x60000000      /* OS-specific */
#define PT_HIOS    0x6fffffff      /* OS-specific */
#define PT_LOPROC  0x70000000
#define PT_HIPROC  0x7fffffff
#define PT_GNU_EH_FRAME		0x6474e550

#define PT_GNU_STACK	(PT_LOOS + 0x474e551)

/*
 * Extended Numbering
 *
 * If the real number of program header table entries is larger than
 * or equal to PN_XNUM(0xffff), it is set to sh_info field of the
 * section header at index 0, and PN_XNUM is set to e_phnum
 * field. Otherwise, the section header at index 0 is zero
 * initialized, if it exists.
 *
 * Specifications are available in:
 *
 * - Oracle: Linker and Libraries.
 *   Part No: 817–1984–19, August 2011.
 *   http://docs.oracle.com/cd/E18752_01/pdf/817-1984.pdf
 *
 * - System V ABI AMD64 Architecture Processor Supplement
 *   Draft Version 0.99.4,
 *   January 13, 2010.
 *   http://www.cs.washington.edu/education/courses/cse351/12wi/supp-docs/abi.pdf
 */
#define PN_XNUM 0xffff

/* These constants define the different elf file types */
#define ET_NONE   0
#define ET_REL    1
#define ET_EXEC   2
#define ET_DYN    3
#define ET_CORE   4
#define ET_LOPROC 0xff00
#define ET_HIPROC 0xffff

/* This is the info that is needed to parse the dynamic section of the file */
#define DT_NULL		0
#define DT_NEEDED	1
#define DT_PLTRELSZ	2
#define DT_PLTGOT	3
#define DT_HASH		4
#define DT_STRTAB	5
#define DT_SYMTAB	6
#define DT_RELA		7
#define DT_RELASZ	8
#define DT_RELAENT	9
#define DT_STRSZ	10
#define DT_SYMENT	11
#define DT_INIT		12
#define DT_FINI		13
#define DT_SONAME	14
#define DT_RPATH 	15
#define DT_SYMBOLIC	16
#define DT_REL	        17
#define DT_RELSZ	18
#define DT_RELENT	19
#define DT_PLTREL	20
#define DT_DEBUG	21
#define DT_TEXTREL	22
#define DT_JMPREL	23
#define DT_ENCODING	32
#define OLD_DT_LOOS	0x60000000
#define DT_LOOS		0x6000000d
#define DT_HIOS		0x6ffff000
#define DT_VALRNGLO	0x6ffffd00
#define DT_VALRNGHI	0x6ffffdff
#define DT_ADDRRNGLO	0x6ffffe00
#define DT_ADDRRNGHI	0x6ffffeff
#define DT_VERSYM	0x6ffffff0
#define DT_RELACOUNT	0x6ffffff9
#define DT_RELCOUNT	0x6ffffffa
#define DT_FLAGS_1	0x6ffffffb
#define DT_VERDEF	0x6ffffffc
#define	DT_VERDEFNUM	0x6ffffffd
#define DT_VERNEED	0x6ffffffe
#define	DT_VERNEEDNUM	0x6fffffff
#define OLD_DT_HIOS     0x6fffffff
#define DT_LOPROC	0x70000000
#define DT_HIPROC	0x7fffffff

/* This info is needed when parsing the symbol table */
#define STB_LOCAL  0
#define STB_GLOBAL 1
#define STB_WEAK   2

#define STT_NOTYPE  0
#define STT_OBJECT  1
#define STT_FUNC    2
#define STT_SECTION 3
#define STT_FILE    4
#define STT_COMMON  5
#define STT_TLS     6

#define ELF_ST_BIND(x)		((x) >> 4)
#define ELF_ST_TYPE(x)		(((unsigned int) x) & 0xf)
#define ELF32_ST_BIND(x)	ELF_ST_BIND(x)
#define ELF32_ST_TYPE(x)	ELF_ST_TYPE(x)
#define ELF64_ST_BIND(x)	ELF_ST_BIND(x)
#define ELF64_ST_TYPE(x)	ELF_ST_TYPE(x)

typedef struct dynamic{
  Elf32_Sword d_tag;
  union{
    Elf32_Sword	d_val;
    Elf32_Addr	d_ptr;
  } d_un;
} Elf32_Dyn;

typedef struct {
  Elf64_Sxword d_tag;		/* entry tag value */
  union {
    Elf64_Xword d_val;
    Elf64_Addr d_ptr;
  } d_un;
} Elf64_Dyn;

/* The following are used with relocations */
#define ELF32_R_SYM(x) ((x) >> 8)
#define ELF32_R_TYPE(x) ((x) & 0xff)

#define ELF64_R_SYM(i)			((i) >> 32)
#define ELF64_R_TYPE(i)			((i) & 0xffffffff)

typedef struct elf32_rel {
  Elf32_Addr	r_offset;
  Elf32_Word	r_info;
} Elf32_Rel;

typedef struct elf64_rel {
  Elf64_Addr r_offset;	/* Location at which to apply the action */
  Elf64_Xword r_info;	/* index and type of relocation */
} Elf64_Rel;

typedef struct elf32_rela{
  Elf32_Addr	r_offset;
  Elf32_Word	r_info;
  Elf32_Sword	r_addend;
} Elf32_Rela;

typedef struct elf64_rela {
  Elf64_Addr r_offset;	/* Location at which to apply the action */
  Elf64_Xword r_info;	/* index and type of relocation */
  Elf64_Sxword r_addend;	/* Constant addend used to compute value */
} Elf64_Rela;

typedef struct elf32_sym{
  Elf32_Word	st_name;
  Elf32_Addr	st_value;
  Elf32_Word	st_size;
  unsigned char	st_info;
  unsigned char	st_other;
  Elf32_Half	st_shndx;
} Elf32_Sym;

typedef struct elf64_sym {
  Elf64_Word st_name;		/* Symbol name, index in string tbl */
  unsigned char	st_info;	/* Type and binding attributes */
  unsigned char	st_other;	/* No defined meaning, 0 */
  Elf64_Half st_shndx;		/* Associated section index */
  Elf64_Addr st_value;		/* Value of the symbol */
  Elf64_Xword st_size;		/* Associated symbol size */
} Elf64_Sym;


#define EI_NIDENT	16

typedef struct elf32_hdr{
  unsigned char	e_ident[EI_NIDENT];
  Elf32_Half	e_type;
  Elf32_Half	e_machine;
  Elf32_Word	e_version;
  Elf32_Addr	e_entry;  /* Entry point */
  Elf32_Off	e_phoff;
  Elf32_Off	e_shoff;
  Elf32_Word	e_flags;
  Elf32_Half	e_ehsize;
  Elf32_Half	e_phentsize;
  Elf32_Half	e_phnum;
  Elf32_Half	e_shentsize;
  Elf32_Half	e_shnum;
  Elf32_Half	e_shstrndx;
} Elf32_Ehdr;

typedef struct elf64_hdr {
  unsigned char	e_ident[EI_NIDENT];	/* ELF "magic number" */
  Elf64_Half e_type;
  Elf64_Half e_machine;
  Elf64_Word e_version;
  Elf64_Addr e_entry;		/* Entry point virtual address */
  Elf64_Off e_phoff;		/* Program header table file offset */
  Elf64_Off e_shoff;		/* Section header table file offset */
  Elf64_Word e_flags;
  Elf64_Half e_ehsize;
  Elf64_Half e_phentsize;
  Elf64_Half e_phnum;
  Elf64_Half e_shentsize;
  Elf64_Half e_shnum;
  Elf64_Half e_shstrndx;
} Elf64_Ehdr;

/* These constants define the permissions on sections in the program
   header, p_flags. */
#define PF_R		0x4
#define PF_W		0x2
#define PF_X		0x1

typedef struct elf32_phdr{
  Elf32_Word	p_type;
  Elf32_Off	p_offset;
  Elf32_Addr	p_vaddr;
  Elf32_Addr	p_paddr;
  Elf32_Word	p_filesz;
  Elf32_Word	p_memsz;
  Elf32_Word	p_flags;
  Elf32_Word	p_align;
} Elf32_Phdr;

typedef struct elf64_phdr {
  Elf64_Word p_type;
  Elf64_Word p_flags;
  Elf64_Off p_offset;		/* Segment file offset */
  Elf64_Addr p_vaddr;		/* Segment virtual address */
  Elf64_Addr p_paddr;		/* Segment physical address */
  Elf64_Xword p_filesz;		/* Segment size in file */
  Elf64_Xword p_memsz;		/* Segment size in memory */
  Elf64_Xword p_align;		/* Segment alignment, file & memory */
} Elf64_Phdr;

/* sh_type */
#define SHT_NULL	0
#define SHT_PROGBITS	1
#define SHT_SYMTAB	2
#define SHT_STRTAB	3
#define SHT_RELA	4
#define SHT_HASH	5
#define SHT_DYNAMIC	6
#define SHT_NOTE	7
#define SHT_NOBITS	8
#define SHT_REL		9
#define SHT_SHLIB	10
#define SHT_DYNSYM	11
#define SHT_NUM		12
#define SHT_LOPROC	0x70000000
#define SHT_HIPROC	0x7fffffff
#define SHT_LOUSER	0x80000000
#define SHT_HIUSER	0xffffffff

/* sh_flags */
#define SHF_WRITE		0x1
#define SHF_ALLOC		0x2
#define SHF_EXECINSTR		0x4
#define SHF_RELA_LIVEPATCH	0x00100000
#define SHF_RO_AFTER_INIT	0x00200000
#define SHF_MASKPROC		0xf0000000

/* special section indexes */
#define SHN_UNDEF	0
#define SHN_LORESERVE	0xff00
#define SHN_LOPROC	0xff00
#define SHN_HIPROC	0xff1f
#define SHN_LIVEPATCH	0xff20
#define SHN_ABS		0xfff1
#define SHN_COMMON	0xfff2
#define SHN_HIRESERVE	0xffff
 
typedef struct elf32_shdr {
  Elf32_Word	sh_name;
  Elf32_Word	sh_type;
  Elf32_Word	sh_flags;
  Elf32_Addr	sh_addr;
  Elf32_Off	sh_offset;
  Elf32_Word	sh_size;
  Elf32_Word	sh_link;
  Elf32_Word	sh_info;
  Elf32_Word	sh_addralign;
  Elf32_Word	sh_entsize;
} Elf32_Shdr;

typedef struct elf64_shdr {
  Elf64_Word sh_name;		/* Section name, index in string tbl */
  Elf64_Word sh_type;		/* Type of section */
  Elf64_Xword sh_flags;		/* Miscellaneous section attributes */
  Elf64_Addr sh_addr;		/* Section virtual addr at execution */
  Elf64_Off sh_offset;		/* Section file offset */
  Elf64_Xword sh_size;		/* Size of section in bytes */
  Elf64_Word sh_link;		/* Index of another section */
  Elf64_Word sh_info;		/* Additional section information */
  Elf64_Xword sh_addralign;	/* Section alignment */
  Elf64_Xword sh_entsize;	/* Entry size if section holds table */
} Elf64_Shdr;

#define	EI_MAG0		0		/* e_ident[] indexes */
#define	EI_MAG1		1
#define	EI_MAG2		2
#define	EI_MAG3		3
#define	EI_CLASS	4
#define	EI_DATA		5
#define	EI_VERSION	6
#define	EI_OSABI	7
#define	EI_PAD		8

#define	ELFMAG0		0x7f		/* EI_MAG */
#define	ELFMAG1		'E'
#define	ELFMAG2		'L'
#define	ELFMAG3		'F'
#define	ELFMAG		"\177ELF"
#define	SELFMAG		4

#define	ELFCLASSNONE	0		/* EI_CLASS */
#define	ELFCLASS32	1
#define	ELFCLASS64	2
#define	ELFCLASSNUM	3

#define ELFDATANONE	0		/* e_ident[EI_DATA] */
#define ELFDATA2LSB	1
#define ELFDATA2MSB	2

#define EV_NONE		0		/* e_version, EI_VERSION */
#define EV_CURRENT	1
#define EV_NUM		2

#define ELFOSABI_NONE	0
#define ELFOSABI_LINUX	3

#ifndef ELF_OSABI
#define ELF_OSABI ELFOSABI_NONE
#endif

/*
 * Notes used in ET_CORE. Architectures export some of the arch register sets
 * using the corresponding note types via the PTRACE_GETREGSET and
 * PTRACE_SETREGSET requests.
 */
#define NT_PRSTATUS	1
#define NT_PRFPREG	2
#define NT_PRPSINFO	3
#define NT_TASKSTRUCT	4
#define NT_AUXV		6
/*
 * Note to userspace developers: size of NT_SIGINFO note may increase
 * in the future to accomodate more fields, don't assume it is fixed!
 */
#define NT_SIGINFO      0x53494749
#define NT_FILE         0x46494c45
#define NT_PRXFPREG     0x46e62b7f      /* copied from gdb5.1/include/elf/common.h */
#define NT_PPC_VMX	0x100		/* PowerPC Altivec/VMX registers */
#define NT_PPC_SPE	0x101		/* PowerPC SPE/EVR registers */
#define NT_PPC_VSX	0x102		/* PowerPC VSX registers */
#define NT_PPC_TAR	0x103		/* Target Address Register */
#define NT_PPC_PPR	0x104		/* Program Priority Register */
#define NT_PPC_DSCR	0x105		/* Data Stream Control Register */
#define NT_PPC_EBB	0x106		/* Event Based Branch Registers */
#define NT_PPC_PMU	0x107		/* Performance Monitor Registers */
#define NT_PPC_TM_CGPR	0x108		/* TM checkpointed GPR Registers */
#define NT_PPC_TM_CFPR	0x109		/* TM checkpointed FPR Registers */
#define NT_PPC_TM_CVMX	0x10a		/* TM checkpointed VMX Registers */
#define NT_PPC_TM_CVSX	0x10b		/* TM checkpointed VSX Registers */
#define NT_PPC_TM_SPR	0x10c		/* TM Special Purpose Registers */
#define NT_PPC_TM_CTAR	0x10d		/* TM checkpointed Target Address Register */
#define NT_PPC_TM_CPPR	0x10e		/* TM checkpointed Program Priority Register */
#define NT_PPC_TM_CDSCR	0x10f		/* TM checkpointed Data Stream Control Register */
#define NT_386_TLS	0x200		/* i386 TLS slots (struct user_desc) */
#define NT_386_IOPERM	0x201		/* x86 io permission bitmap (1=deny) */
#define NT_X86_XSTATE	0x202		/* x86 extended state using xsave */
#define NT_S390_HIGH_GPRS	0x300	/* s390 upper register halves */
#define NT_S390_TIMER	0x301		/* s390 timer register */
#define NT_S390_TODCMP	0x302		/* s390 TOD clock comparator register */
#define NT_S390_TODPREG	0x303		/* s390 TOD programmable register */
#define NT_S390_CTRS	0x304		/* s390 control registers */
#define NT_S390_PREFIX	0x305		/* s390 prefix register */
#define NT_S390_LAST_BREAK	0x306	/* s390 breaking event address */
#define NT_S390_SYSTEM_CALL	0x307	/* s390 system call restart data */
#define NT_S390_TDB	0x308		/* s390 transaction diagnostic block */
#define NT_S390_VXRS_LOW	0x309	/* s390 vector registers 0-15 upper half */
#define NT_S390_VXRS_HIGH	0x30a	/* s390 vector registers 16-31 */
#define NT_S390_GS_CB	0x30b		/* s390 guarded storage registers */
#define NT_S390_GS_BC	0x30c		/* s390 guarded storage broadcast control block */
#define NT_ARM_VFP	0x400		/* ARM VFP/NEON registers */
#define NT_ARM_TLS	0x401		/* ARM TLS register */
#define NT_ARM_HW_BREAK	0x402		/* ARM hardware breakpoint registers */
#define NT_ARM_HW_WATCH	0x403		/* ARM hardware watchpoint registers */
#define NT_ARM_SYSTEM_CALL	0x404	/* ARM system call number */
#define NT_METAG_CBUF	0x500		/* Metag catch buffer registers */
#define NT_METAG_RPIPE	0x501		/* Metag read pipeline state */
#define NT_METAG_TLS	0x502		/* Metag TLS pointer */
#define NT_ARC_V2	0x600		/* ARCv2 accumulator/extra registers */

/* Note header in a PT_NOTE section */
typedef struct elf32_note {
  Elf32_Word	n_namesz;	/* Name size */
  Elf32_Word	n_descsz;	/* Content size */
  Elf32_Word	n_type;		/* Content type */
} Elf32_Nhdr;

/* Note header in a PT_NOTE section */
typedef struct elf64_note {
  Elf64_Word n_namesz;	/* Name size */
  Elf64_Word n_descsz;	/* Content size */
  Elf64_Word n_type;	/* Content type */
} Elf64_Nhdr;

#endif /* _UAPI_LINUX_ELF_H */