projects/linux·blob v2.6.13 · refs

449 lines · 11.4 KiB

1#ifndef _LINUX_ELF_H
2#define _LINUX_ELF_H
3
4#include <linux/types.h>
5#include <asm/elf.h>
6
7#ifndef elf_read_implies_exec
8 /* Executables for which elf_read_implies_exec() returns TRUE will
9 have the READ_IMPLIES_EXEC personality flag set automatically.
10 Override in asm/elf.h as needed. */
11# define elf_read_implies_exec(ex, have_pt_gnu_stack) 0
12#endif
13
14/* 32-bit ELF base types. */
15typedef __u32 Elf32_Addr;
16typedef __u16 Elf32_Half;
17typedef __u32 Elf32_Off;
18typedef __s32 Elf32_Sword;
19typedef __u32 Elf32_Word;
20
21/* 64-bit ELF base types. */
22typedef __u64 Elf64_Addr;
23typedef __u16 Elf64_Half;
24typedef __s16 Elf64_SHalf;
25typedef __u64 Elf64_Off;
26typedef __s32 Elf64_Sword;
27typedef __u32 Elf64_Word;
28typedef __u64 Elf64_Xword;
29typedef __s64 Elf64_Sxword;
30
31/* These constants are for the segment types stored in the image headers */
32#define PT_NULL 0
33#define PT_LOAD 1
34#define PT_DYNAMIC 2
35#define PT_INTERP 3
36#define PT_NOTE 4
37#define PT_SHLIB 5
38#define PT_PHDR 6
39#define PT_TLS 7 /* Thread local storage segment */
40#define PT_LOOS 0x60000000 /* OS-specific */
41#define PT_HIOS 0x6fffffff /* OS-specific */
42#define PT_LOPROC 0x70000000
43#define PT_HIPROC 0x7fffffff
44#define PT_GNU_EH_FRAME 0x6474e550
45
46#define PT_GNU_STACK (PT_LOOS + 0x474e551)
47
48/* These constants define the different elf file types */
49#define ET_NONE 0
50#define ET_REL 1
51#define ET_EXEC 2
52#define ET_DYN 3
53#define ET_CORE 4
54#define ET_LOPROC 0xff00
55#define ET_HIPROC 0xffff
56
57/* These constants define the various ELF target machines */
58#define EM_NONE 0
59#define EM_M32 1
60#define EM_SPARC 2
61#define EM_386 3
62#define EM_68K 4
63#define EM_88K 5
64#define EM_486 6 /* Perhaps disused */
65#define EM_860 7
66
67#define EM_MIPS 8 /* MIPS R3000 (officially, big-endian only) */
68
69#define EM_MIPS_RS4_BE 10 /* MIPS R4000 big-endian */
70
71#define EM_PARISC 15 /* HPPA */
72
73#define EM_SPARC32PLUS 18 /* Sun's "v8plus" */
74
75#define EM_PPC 20 /* PowerPC */
76#define EM_PPC64 21 /* PowerPC64 */
77
78#define EM_SH 42 /* SuperH */
79
80#define EM_SPARCV9 43 /* SPARC v9 64-bit */
81
82#define EM_IA_64 50 /* HP/Intel IA-64 */
83
84#define EM_X86_64 62 /* AMD x86-64 */
85
86#define EM_S390 22 /* IBM S/390 */
87
88#define EM_CRIS 76 /* Axis Communications 32-bit embedded processor */
89
90#define EM_V850 87 /* NEC v850 */
91
92#define EM_M32R 88 /* Renesas M32R */
93
94#define EM_H8_300 46 /* Renesas H8/300,300H,H8S */
95
96/*
97 * This is an interim value that we will use until the committee comes
98 * up with a final number.
99 */
100#define EM_ALPHA 0x9026
101
102/* Bogus old v850 magic number, used by old tools. */
103#define EM_CYGNUS_V850 0x9080
104
105/* Bogus old m32r magic number, used by old tools. */
106#define EM_CYGNUS_M32R 0x9041
107
108/*
109 * This is the old interim value for S/390 architecture
110 */
111#define EM_S390_OLD 0xA390
112
113#define EM_FRV 0x5441 /* Fujitsu FR-V */
114
115/* This is the info that is needed to parse the dynamic section of the file */
116#define DT_NULL 0
117#define DT_NEEDED 1
118#define DT_PLTRELSZ 2
119#define DT_PLTGOT 3
120#define DT_HASH 4
121#define DT_STRTAB 5
122#define DT_SYMTAB 6
123#define DT_RELA 7
124#define DT_RELASZ 8
125#define DT_RELAENT 9
126#define DT_STRSZ 10
127#define DT_SYMENT 11
128#define DT_INIT 12
129#define DT_FINI 13
130#define DT_SONAME 14
131#define DT_RPATH 15
132#define DT_SYMBOLIC 16
133#define DT_REL 17
134#define DT_RELSZ 18
135#define DT_RELENT 19
136#define DT_PLTREL 20
137#define DT_DEBUG 21
138#define DT_TEXTREL 22
139#define DT_JMPREL 23
140#define DT_LOPROC 0x70000000
141#define DT_HIPROC 0x7fffffff
142
143/* This info is needed when parsing the symbol table */
144#define STB_LOCAL 0
145#define STB_GLOBAL 1
146#define STB_WEAK 2
147
148#define STT_NOTYPE 0
149#define STT_OBJECT 1
150#define STT_FUNC 2
151#define STT_SECTION 3
152#define STT_FILE 4
153
154#define ELF_ST_BIND(x) ((x) >> 4)
155#define ELF_ST_TYPE(x) (((unsigned int) x) & 0xf)
156#define ELF32_ST_BIND(x) ELF_ST_BIND(x)
157#define ELF32_ST_TYPE(x) ELF_ST_TYPE(x)
158#define ELF64_ST_BIND(x) ELF_ST_BIND(x)
159#define ELF64_ST_TYPE(x) ELF_ST_TYPE(x)
160
161/* Symbolic values for the entries in the auxiliary table
162 put on the initial stack */
163#define AT_NULL 0 /* end of vector */
164#define AT_IGNORE 1 /* entry should be ignored */
165#define AT_EXECFD 2 /* file descriptor of program */
166#define AT_PHDR 3 /* program headers for program */
167#define AT_PHENT 4 /* size of program header entry */
168#define AT_PHNUM 5 /* number of program headers */
169#define AT_PAGESZ 6 /* system page size */
170#define AT_BASE 7 /* base address of interpreter */
171#define AT_FLAGS 8 /* flags */
172#define AT_ENTRY 9 /* entry point of program */
173#define AT_NOTELF 10 /* program is not ELF */
174#define AT_UID 11 /* real uid */
175#define AT_EUID 12 /* effective uid */
176#define AT_GID 13 /* real gid */
177#define AT_EGID 14 /* effective gid */
178#define AT_PLATFORM 15 /* string identifying CPU for optimizations */
179#define AT_HWCAP 16 /* arch dependent hints at CPU capabilities */
180#define AT_CLKTCK 17 /* frequency at which times() increments */
181
182#define AT_SECURE 23 /* secure mode boolean */
183
184typedef struct dynamic{
185 Elf32_Sword d_tag;
186 union{
187 Elf32_Sword d_val;
188 Elf32_Addr d_ptr;
189 } d_un;
190} Elf32_Dyn;
191
192typedef struct {
193 Elf64_Sxword d_tag; /* entry tag value */
194 union {
195 Elf64_Xword d_val;
196 Elf64_Addr d_ptr;
197 } d_un;
198} Elf64_Dyn;
199
200/* The following are used with relocations */
201#define ELF32_R_SYM(x) ((x) >> 8)
202#define ELF32_R_TYPE(x) ((x) & 0xff)
203
204#define ELF64_R_SYM(i) ((i) >> 32)
205#define ELF64_R_TYPE(i) ((i) & 0xffffffff)
206
207typedef struct elf32_rel {
208 Elf32_Addr r_offset;
209 Elf32_Word r_info;
210} Elf32_Rel;
211
212typedef struct elf64_rel {
213 Elf64_Addr r_offset; /* Location at which to apply the action */
214 Elf64_Xword r_info; /* index and type of relocation */
215} Elf64_Rel;
216
217typedef struct elf32_rela{
218 Elf32_Addr r_offset;
219 Elf32_Word r_info;
220 Elf32_Sword r_addend;
221} Elf32_Rela;
222
223typedef struct elf64_rela {
224 Elf64_Addr r_offset; /* Location at which to apply the action */
225 Elf64_Xword r_info; /* index and type of relocation */
226 Elf64_Sxword r_addend; /* Constant addend used to compute value */
227} Elf64_Rela;
228
229typedef struct elf32_sym{
230 Elf32_Word st_name;
231 Elf32_Addr st_value;
232 Elf32_Word st_size;
233 unsigned char st_info;
234 unsigned char st_other;
235 Elf32_Half st_shndx;
236} Elf32_Sym;
237
238typedef struct elf64_sym {
239 Elf64_Word st_name; /* Symbol name, index in string tbl */
240 unsigned char st_info; /* Type and binding attributes */
241 unsigned char st_other; /* No defined meaning, 0 */
242 Elf64_Half st_shndx; /* Associated section index */
243 Elf64_Addr st_value; /* Value of the symbol */
244 Elf64_Xword st_size; /* Associated symbol size */
245} Elf64_Sym;
246
247
248#define EI_NIDENT 16
249
250typedef struct elf32_hdr{
251 unsigned char e_ident[EI_NIDENT];
252 Elf32_Half e_type;
253 Elf32_Half e_machine;
254 Elf32_Word e_version;
255 Elf32_Addr e_entry; /* Entry point */
256 Elf32_Off e_phoff;
257 Elf32_Off e_shoff;
258 Elf32_Word e_flags;
259 Elf32_Half e_ehsize;
260 Elf32_Half e_phentsize;
261 Elf32_Half e_phnum;
262 Elf32_Half e_shentsize;
263 Elf32_Half e_shnum;
264 Elf32_Half e_shstrndx;
265} Elf32_Ehdr;
266
267typedef struct elf64_hdr {
268 unsigned char e_ident[16]; /* ELF "magic number" */
269 Elf64_Half e_type;
270 Elf64_Half e_machine;
271 Elf64_Word e_version;
272 Elf64_Addr e_entry; /* Entry point virtual address */
273 Elf64_Off e_phoff; /* Program header table file offset */
274 Elf64_Off e_shoff; /* Section header table file offset */
275 Elf64_Word e_flags;
276 Elf64_Half e_ehsize;
277 Elf64_Half e_phentsize;
278 Elf64_Half e_phnum;
279 Elf64_Half e_shentsize;
280 Elf64_Half e_shnum;
281 Elf64_Half e_shstrndx;
282} Elf64_Ehdr;
283
284/* These constants define the permissions on sections in the program
285 header, p_flags. */
286#define PF_R 0x4
287#define PF_W 0x2
288#define PF_X 0x1
289
290typedef struct elf32_phdr{
291 Elf32_Word p_type;
292 Elf32_Off p_offset;
293 Elf32_Addr p_vaddr;
294 Elf32_Addr p_paddr;
295 Elf32_Word p_filesz;
296 Elf32_Word p_memsz;
297 Elf32_Word p_flags;
298 Elf32_Word p_align;
299} Elf32_Phdr;
300
301typedef struct elf64_phdr {
302 Elf64_Word p_type;
303 Elf64_Word p_flags;
304 Elf64_Off p_offset; /* Segment file offset */
305 Elf64_Addr p_vaddr; /* Segment virtual address */
306 Elf64_Addr p_paddr; /* Segment physical address */
307 Elf64_Xword p_filesz; /* Segment size in file */
308 Elf64_Xword p_memsz; /* Segment size in memory */
309 Elf64_Xword p_align; /* Segment alignment, file & memory */
310} Elf64_Phdr;
311
312/* sh_type */
313#define SHT_NULL 0
314#define SHT_PROGBITS 1
315#define SHT_SYMTAB 2
316#define SHT_STRTAB 3
317#define SHT_RELA 4
318#define SHT_HASH 5
319#define SHT_DYNAMIC 6
320#define SHT_NOTE 7
321#define SHT_NOBITS 8
322#define SHT_REL 9
323#define SHT_SHLIB 10
324#define SHT_DYNSYM 11
325#define SHT_NUM 12
326#define SHT_LOPROC 0x70000000
327#define SHT_HIPROC 0x7fffffff
328#define SHT_LOUSER 0x80000000
329#define SHT_HIUSER 0xffffffff
330
331/* sh_flags */
332#define SHF_WRITE 0x1
333#define SHF_ALLOC 0x2
334#define SHF_EXECINSTR 0x4
335#define SHF_MASKPROC 0xf0000000
336
337/* special section indexes */
338#define SHN_UNDEF 0
339#define SHN_LORESERVE 0xff00
340#define SHN_LOPROC 0xff00
341#define SHN_HIPROC 0xff1f
342#define SHN_ABS 0xfff1
343#define SHN_COMMON 0xfff2
344#define SHN_HIRESERVE 0xffff
345
346typedef struct {
347 Elf32_Word sh_name;
348 Elf32_Word sh_type;
349 Elf32_Word sh_flags;
350 Elf32_Addr sh_addr;
351 Elf32_Off sh_offset;
352 Elf32_Word sh_size;
353 Elf32_Word sh_link;
354 Elf32_Word sh_info;
355 Elf32_Word sh_addralign;
356 Elf32_Word sh_entsize;
357} Elf32_Shdr;
358
359typedef struct elf64_shdr {
360 Elf64_Word sh_name; /* Section name, index in string tbl */
361 Elf64_Word sh_type; /* Type of section */
362 Elf64_Xword sh_flags; /* Miscellaneous section attributes */
363 Elf64_Addr sh_addr; /* Section virtual addr at execution */
364 Elf64_Off sh_offset; /* Section file offset */
365 Elf64_Xword sh_size; /* Size of section in bytes */
366 Elf64_Word sh_link; /* Index of another section */
367 Elf64_Word sh_info; /* Additional section information */
368 Elf64_Xword sh_addralign; /* Section alignment */
369 Elf64_Xword sh_entsize; /* Entry size if section holds table */
370} Elf64_Shdr;
371
372#define EI_MAG0 0 /* e_ident[] indexes */
373#define EI_MAG1 1
374#define EI_MAG2 2
375#define EI_MAG3 3
376#define EI_CLASS 4
377#define EI_DATA 5
378#define EI_VERSION 6
379#define EI_OSABI 7
380#define EI_PAD 8
381
382#define ELFMAG0 0x7f /* EI_MAG */
383#define ELFMAG1 'E'
384#define ELFMAG2 'L'
385#define ELFMAG3 'F'
386#define ELFMAG "\177ELF"
387#define SELFMAG 4
388
389#define ELFCLASSNONE 0 /* EI_CLASS */
390#define ELFCLASS32 1
391#define ELFCLASS64 2
392#define ELFCLASSNUM 3
393
394#define ELFDATANONE 0 /* e_ident[EI_DATA] */
395#define ELFDATA2LSB 1
396#define ELFDATA2MSB 2
397
398#define EV_NONE 0 /* e_version, EI_VERSION */
399#define EV_CURRENT 1
400#define EV_NUM 2
401
402#define ELFOSABI_NONE 0
403#define ELFOSABI_LINUX 3
404
405#ifndef ELF_OSABI
406#define ELF_OSABI ELFOSABI_NONE
407#endif
408
409/* Notes used in ET_CORE */
410#define NT_PRSTATUS 1
411#define NT_PRFPREG 2
412#define NT_PRPSINFO 3
413#define NT_TASKSTRUCT 4
414#define NT_AUXV 6
415#define NT_PRXFPREG 0x46e62b7f /* copied from gdb5.1/include/elf/common.h */
416
417
418/* Note header in a PT_NOTE section */
419typedef struct elf32_note {
420 Elf32_Word n_namesz; /* Name size */
421 Elf32_Word n_descsz; /* Content size */
422 Elf32_Word n_type; /* Content type */
423} Elf32_Nhdr;
424
425/* Note header in a PT_NOTE section */
426typedef struct elf64_note {
427 Elf64_Word n_namesz; /* Name size */
428 Elf64_Word n_descsz; /* Content size */
429 Elf64_Word n_type; /* Content type */
430} Elf64_Nhdr;
431
432#if ELF_CLASS == ELFCLASS32
433
434extern Elf32_Dyn _DYNAMIC [];
435#define elfhdr elf32_hdr
436#define elf_phdr elf32_phdr
437#define elf_note elf32_note
438
439#else
440
441extern Elf64_Dyn _DYNAMIC [];
442#define elfhdr elf64_hdr
443#define elf_phdr elf64_phdr
444#define elf_note elf64_note
445
446#endif
447
448
449#endif /* _LINUX_ELF_H */