elf.h revision 30692c65c4174412c90e79489e98ab85c1a7412f
1#ifndef _UAPI_LINUX_ELF_H
2#define _UAPI_LINUX_ELF_H
3
4#include <linux/types.h>
5#include <linux/elf-em.h>
6
7/* 32-bit ELF base types. */
8typedef __u32	Elf32_Addr;
9typedef __u16	Elf32_Half;
10typedef __u32	Elf32_Off;
11typedef __s32	Elf32_Sword;
12typedef __u32	Elf32_Word;
13
14/* 64-bit ELF base types. */
15typedef __u64	Elf64_Addr;
16typedef __u16	Elf64_Half;
17typedef __s16	Elf64_SHalf;
18typedef __u64	Elf64_Off;
19typedef __s32	Elf64_Sword;
20typedef __u32	Elf64_Word;
21typedef __u64	Elf64_Xword;
22typedef __s64	Elf64_Sxword;
23
24/* These constants are for the segment types stored in the image headers */
25#define PT_NULL    0
26#define PT_LOAD    1
27#define PT_DYNAMIC 2
28#define PT_INTERP  3
29#define PT_NOTE    4
30#define PT_SHLIB   5
31#define PT_PHDR    6
32#define PT_TLS     7               /* Thread local storage segment */
33#define PT_LOOS    0x60000000      /* OS-specific */
34#define PT_HIOS    0x6fffffff      /* OS-specific */
35#define PT_LOPROC  0x70000000
36#define PT_HIPROC  0x7fffffff
37#define PT_GNU_EH_FRAME		0x6474e550
38
39#define PT_GNU_STACK	(PT_LOOS + 0x474e551)
40
41/*
42 * Extended Numbering
43 *
44 * If the real number of program header table entries is larger than
45 * or equal to PN_XNUM(0xffff), it is set to sh_info field of the
46 * section header at index 0, and PN_XNUM is set to e_phnum
47 * field. Otherwise, the section header at index 0 is zero
48 * initialized, if it exists.
49 *
50 * Specifications are available in:
51 *
52 * - Oracle: Linker and Libraries.
53 *   Part No: 817–1984–19, August 2011.
54 *   http://docs.oracle.com/cd/E18752_01/pdf/817-1984.pdf
55 *
56 * - System V ABI AMD64 Architecture Processor Supplement
57 *   Draft Version 0.99.4,
58 *   January 13, 2010.
59 *   http://www.cs.washington.edu/education/courses/cse351/12wi/supp-docs/abi.pdf
60 */
61#define PN_XNUM 0xffff
62
63/* These constants define the different elf file types */
64#define ET_NONE   0
65#define ET_REL    1
66#define ET_EXEC   2
67#define ET_DYN    3
68#define ET_CORE   4
69#define ET_LOPROC 0xff00
70#define ET_HIPROC 0xffff
71
72/* This is the info that is needed to parse the dynamic section of the file */
73#define DT_NULL		0
74#define DT_NEEDED	1
75#define DT_PLTRELSZ	2
76#define DT_PLTGOT	3
77#define DT_HASH		4
78#define DT_STRTAB	5
79#define DT_SYMTAB	6
80#define DT_RELA		7
81#define DT_RELASZ	8
82#define DT_RELAENT	9
83#define DT_STRSZ	10
84#define DT_SYMENT	11
85#define DT_INIT		12
86#define DT_FINI		13
87#define DT_SONAME	14
88#define DT_RPATH 	15
89#define DT_SYMBOLIC	16
90#define DT_REL	        17
91#define DT_RELSZ	18
92#define DT_RELENT	19
93#define DT_PLTREL	20
94#define DT_DEBUG	21
95#define DT_TEXTREL	22
96#define DT_JMPREL	23
97#define DT_ENCODING	32
98#define OLD_DT_LOOS	0x60000000
99#define DT_LOOS		0x6000000d
100#define DT_HIOS		0x6ffff000
101#define DT_VALRNGLO	0x6ffffd00
102#define DT_VALRNGHI	0x6ffffdff
103#define DT_ADDRRNGLO	0x6ffffe00
104#define DT_ADDRRNGHI	0x6ffffeff
105#define DT_VERSYM	0x6ffffff0
106#define DT_RELACOUNT	0x6ffffff9
107#define DT_RELCOUNT	0x6ffffffa
108#define DT_FLAGS_1	0x6ffffffb
109#define DT_VERDEF	0x6ffffffc
110#define	DT_VERDEFNUM	0x6ffffffd
111#define DT_VERNEED	0x6ffffffe
112#define	DT_VERNEEDNUM	0x6fffffff
113#define OLD_DT_HIOS     0x6fffffff
114#define DT_LOPROC	0x70000000
115#define DT_HIPROC	0x7fffffff
116
117/* This info is needed when parsing the symbol table */
118#define STB_LOCAL  0
119#define STB_GLOBAL 1
120#define STB_WEAK   2
121
122#define STT_NOTYPE  0
123#define STT_OBJECT  1
124#define STT_FUNC    2
125#define STT_SECTION 3
126#define STT_FILE    4
127#define STT_COMMON  5
128#define STT_TLS     6
129
130#define ELF_ST_BIND(x)		((x) >> 4)
131#define ELF_ST_TYPE(x)		(((unsigned int) x) & 0xf)
132#define ELF32_ST_BIND(x)	ELF_ST_BIND(x)
133#define ELF32_ST_TYPE(x)	ELF_ST_TYPE(x)
134#define ELF64_ST_BIND(x)	ELF_ST_BIND(x)
135#define ELF64_ST_TYPE(x)	ELF_ST_TYPE(x)
136
137typedef struct dynamic{
138  Elf32_Sword d_tag;
139  union{
140    Elf32_Sword	d_val;
141    Elf32_Addr	d_ptr;
142  } d_un;
143} Elf32_Dyn;
144
145typedef struct {
146  Elf64_Sxword d_tag;		/* entry tag value */
147  union {
148    Elf64_Xword d_val;
149    Elf64_Addr d_ptr;
150  } d_un;
151} Elf64_Dyn;
152
153/* The following are used with relocations */
154#define ELF32_R_SYM(x) ((x) >> 8)
155#define ELF32_R_TYPE(x) ((x) & 0xff)
156
157#define ELF64_R_SYM(i)			((i) >> 32)
158#define ELF64_R_TYPE(i)			((i) & 0xffffffff)
159
160typedef struct elf32_rel {
161  Elf32_Addr	r_offset;
162  Elf32_Word	r_info;
163} Elf32_Rel;
164
165typedef struct elf64_rel {
166  Elf64_Addr r_offset;	/* Location at which to apply the action */
167  Elf64_Xword r_info;	/* index and type of relocation */
168} Elf64_Rel;
169
170typedef struct elf32_rela{
171  Elf32_Addr	r_offset;
172  Elf32_Word	r_info;
173  Elf32_Sword	r_addend;
174} Elf32_Rela;
175
176typedef struct elf64_rela {
177  Elf64_Addr r_offset;	/* Location at which to apply the action */
178  Elf64_Xword r_info;	/* index and type of relocation */
179  Elf64_Sxword r_addend;	/* Constant addend used to compute value */
180} Elf64_Rela;
181
182typedef struct elf32_sym{
183  Elf32_Word	st_name;
184  Elf32_Addr	st_value;
185  Elf32_Word	st_size;
186  unsigned char	st_info;
187  unsigned char	st_other;
188  Elf32_Half	st_shndx;
189} Elf32_Sym;
190
191typedef struct elf64_sym {
192  Elf64_Word st_name;		/* Symbol name, index in string tbl */
193  unsigned char	st_info;	/* Type and binding attributes */
194  unsigned char	st_other;	/* No defined meaning, 0 */
195  Elf64_Half st_shndx;		/* Associated section index */
196  Elf64_Addr st_value;		/* Value of the symbol */
197  Elf64_Xword st_size;		/* Associated symbol size */
198} Elf64_Sym;
199
200
201#define EI_NIDENT	16
202
203typedef struct elf32_hdr{
204  unsigned char	e_ident[EI_NIDENT];
205  Elf32_Half	e_type;
206  Elf32_Half	e_machine;
207  Elf32_Word	e_version;
208  Elf32_Addr	e_entry;  /* Entry point */
209  Elf32_Off	e_phoff;
210  Elf32_Off	e_shoff;
211  Elf32_Word	e_flags;
212  Elf32_Half	e_ehsize;
213  Elf32_Half	e_phentsize;
214  Elf32_Half	e_phnum;
215  Elf32_Half	e_shentsize;
216  Elf32_Half	e_shnum;
217  Elf32_Half	e_shstrndx;
218} Elf32_Ehdr;
219
220typedef struct elf64_hdr {
221  unsigned char	e_ident[EI_NIDENT];	/* ELF "magic number" */
222  Elf64_Half e_type;
223  Elf64_Half e_machine;
224  Elf64_Word e_version;
225  Elf64_Addr e_entry;		/* Entry point virtual address */
226  Elf64_Off e_phoff;		/* Program header table file offset */
227  Elf64_Off e_shoff;		/* Section header table file offset */
228  Elf64_Word e_flags;
229  Elf64_Half e_ehsize;
230  Elf64_Half e_phentsize;
231  Elf64_Half e_phnum;
232  Elf64_Half e_shentsize;
233  Elf64_Half e_shnum;
234  Elf64_Half e_shstrndx;
235} Elf64_Ehdr;
236
237/* These constants define the permissions on sections in the program
238   header, p_flags. */
239#define PF_R		0x4
240#define PF_W		0x2
241#define PF_X		0x1
242
243typedef struct elf32_phdr{
244  Elf32_Word	p_type;
245  Elf32_Off	p_offset;
246  Elf32_Addr	p_vaddr;
247  Elf32_Addr	p_paddr;
248  Elf32_Word	p_filesz;
249  Elf32_Word	p_memsz;
250  Elf32_Word	p_flags;
251  Elf32_Word	p_align;
252} Elf32_Phdr;
253
254typedef struct elf64_phdr {
255  Elf64_Word p_type;
256  Elf64_Word p_flags;
257  Elf64_Off p_offset;		/* Segment file offset */
258  Elf64_Addr p_vaddr;		/* Segment virtual address */
259  Elf64_Addr p_paddr;		/* Segment physical address */
260  Elf64_Xword p_filesz;		/* Segment size in file */
261  Elf64_Xword p_memsz;		/* Segment size in memory */
262  Elf64_Xword p_align;		/* Segment alignment, file & memory */
263} Elf64_Phdr;
264
265/* sh_type */
266#define SHT_NULL	0
267#define SHT_PROGBITS	1
268#define SHT_SYMTAB	2
269#define SHT_STRTAB	3
270#define SHT_RELA	4
271#define SHT_HASH	5
272#define SHT_DYNAMIC	6
273#define SHT_NOTE	7
274#define SHT_NOBITS	8
275#define SHT_REL		9
276#define SHT_SHLIB	10
277#define SHT_DYNSYM	11
278#define SHT_NUM		12
279#define SHT_LOPROC	0x70000000
280#define SHT_HIPROC	0x7fffffff
281#define SHT_LOUSER	0x80000000
282#define SHT_HIUSER	0xffffffff
283
284/* sh_flags */
285#define SHF_WRITE	0x1
286#define SHF_ALLOC	0x2
287#define SHF_EXECINSTR	0x4
288#define SHF_MASKPROC	0xf0000000
289
290/* special section indexes */
291#define SHN_UNDEF	0
292#define SHN_LORESERVE	0xff00
293#define SHN_LOPROC	0xff00
294#define SHN_HIPROC	0xff1f
295#define SHN_ABS		0xfff1
296#define SHN_COMMON	0xfff2
297#define SHN_HIRESERVE	0xffff
298
299typedef struct elf32_shdr {
300  Elf32_Word	sh_name;
301  Elf32_Word	sh_type;
302  Elf32_Word	sh_flags;
303  Elf32_Addr	sh_addr;
304  Elf32_Off	sh_offset;
305  Elf32_Word	sh_size;
306  Elf32_Word	sh_link;
307  Elf32_Word	sh_info;
308  Elf32_Word	sh_addralign;
309  Elf32_Word	sh_entsize;
310} Elf32_Shdr;
311
312typedef struct elf64_shdr {
313  Elf64_Word sh_name;		/* Section name, index in string tbl */
314  Elf64_Word sh_type;		/* Type of section */
315  Elf64_Xword sh_flags;		/* Miscellaneous section attributes */
316  Elf64_Addr sh_addr;		/* Section virtual addr at execution */
317  Elf64_Off sh_offset;		/* Section file offset */
318  Elf64_Xword sh_size;		/* Size of section in bytes */
319  Elf64_Word sh_link;		/* Index of another section */
320  Elf64_Word sh_info;		/* Additional section information */
321  Elf64_Xword sh_addralign;	/* Section alignment */
322  Elf64_Xword sh_entsize;	/* Entry size if section holds table */
323} Elf64_Shdr;
324
325#define	EI_MAG0		0		/* e_ident[] indexes */
326#define	EI_MAG1		1
327#define	EI_MAG2		2
328#define	EI_MAG3		3
329#define	EI_CLASS	4
330#define	EI_DATA		5
331#define	EI_VERSION	6
332#define	EI_OSABI	7
333#define	EI_PAD		8
334
335#define	ELFMAG0		0x7f		/* EI_MAG */
336#define	ELFMAG1		'E'
337#define	ELFMAG2		'L'
338#define	ELFMAG3		'F'
339#define	ELFMAG		"\177ELF"
340#define	SELFMAG		4
341
342#define	ELFCLASSNONE	0		/* EI_CLASS */
343#define	ELFCLASS32	1
344#define	ELFCLASS64	2
345#define	ELFCLASSNUM	3
346
347#define ELFDATANONE	0		/* e_ident[EI_DATA] */
348#define ELFDATA2LSB	1
349#define ELFDATA2MSB	2
350
351#define EV_NONE		0		/* e_version, EI_VERSION */
352#define EV_CURRENT	1
353#define EV_NUM		2
354
355#define ELFOSABI_NONE	0
356#define ELFOSABI_LINUX	3
357
358#ifndef ELF_OSABI
359#define ELF_OSABI ELFOSABI_NONE
360#endif
361
362/*
363 * Notes used in ET_CORE. Architectures export some of the arch register sets
364 * using the corresponding note types via the PTRACE_GETREGSET and
365 * PTRACE_SETREGSET requests.
366 */
367#define NT_PRSTATUS	1
368#define NT_PRFPREG	2
369#define NT_PRPSINFO	3
370#define NT_TASKSTRUCT	4
371#define NT_AUXV		6
372/*
373 * Note to userspace developers: size of NT_SIGINFO note may increase
374 * in the future to accomodate more fields, don't assume it is fixed!
375 */
376#define NT_SIGINFO      0x53494749
377#define NT_FILE         0x46494c45
378#define NT_PRXFPREG     0x46e62b7f      /* copied from gdb5.1/include/elf/common.h */
379#define NT_PPC_VMX	0x100		/* PowerPC Altivec/VMX registers */
380#define NT_PPC_SPE	0x101		/* PowerPC SPE/EVR registers */
381#define NT_PPC_VSX	0x102		/* PowerPC VSX registers */
382#define NT_386_TLS	0x200		/* i386 TLS slots (struct user_desc) */
383#define NT_386_IOPERM	0x201		/* x86 io permission bitmap (1=deny) */
384#define NT_X86_XSTATE	0x202		/* x86 extended state using xsave */
385#define NT_S390_HIGH_GPRS	0x300	/* s390 upper register halves */
386#define NT_S390_TIMER	0x301		/* s390 timer register */
387#define NT_S390_TODCMP	0x302		/* s390 TOD clock comparator register */
388#define NT_S390_TODPREG	0x303		/* s390 TOD programmable register */
389#define NT_S390_CTRS	0x304		/* s390 control registers */
390#define NT_S390_PREFIX	0x305		/* s390 prefix register */
391#define NT_S390_LAST_BREAK	0x306	/* s390 breaking event address */
392#define NT_S390_SYSTEM_CALL	0x307	/* s390 system call restart data */
393#define NT_S390_TDB	0x308		/* s390 transaction diagnostic block */
394#define NT_ARM_VFP	0x400		/* ARM VFP/NEON registers */
395#define NT_ARM_TLS	0x401		/* ARM TLS register */
396#define NT_ARM_HW_BREAK	0x402		/* ARM hardware breakpoint registers */
397#define NT_ARM_HW_WATCH	0x403		/* ARM hardware watchpoint registers */
398#define NT_METAG_CBUF	0x500		/* Metag catch buffer registers */
399#define NT_METAG_RPIPE	0x501		/* Metag read pipeline state */
400#define NT_METAG_TLS	0x502		/* Metag TLS pointer */
401
402
403/* Note header in a PT_NOTE section */
404typedef struct elf32_note {
405  Elf32_Word	n_namesz;	/* Name size */
406  Elf32_Word	n_descsz;	/* Content size */
407  Elf32_Word	n_type;		/* Content type */
408} Elf32_Nhdr;
409
410/* Note header in a PT_NOTE section */
411typedef struct elf64_note {
412  Elf64_Word n_namesz;	/* Name size */
413  Elf64_Word n_descsz;	/* Content size */
414  Elf64_Word n_type;	/* Content type */
415} Elf64_Nhdr;
416
417#endif /* _UAPI_LINUX_ELF_H */
418