1 #ifndef _LINUX_ELF_H
2 #define _LINUX_ELF_H
3
4 #include <linux/types.h>
5 #include <linux/elf-em.h>
6 #ifdef __KERNEL__
7 #include <asm/elf.h>
8 #endif
9
10 /* 32-bit ELF base types. */
11 typedef __u32 Elf32_Addr;
12 typedef __u16 Elf32_Half;
13 typedef __u32 Elf32_Off;
14 typedef __s32 Elf32_Sword;
15 typedef __u32 Elf32_Word;
16
17 /* 64-bit ELF base types. */
18 typedef __u64 Elf64_Addr;
19 typedef __u16 Elf64_Half;
20 typedef __s16 Elf64_SHalf;
21 typedef __u64 Elf64_Off;
22 typedef __s32 Elf64_Sword;
23 typedef __u32 Elf64_Word;
24 typedef __u64 Elf64_Xword;
25 typedef __s64 Elf64_Sxword;
26
27 /* These constants are for the segment types stored in the image headers */
28 #define PT_NULL 0
29 #define PT_LOAD 1
30 #define PT_DYNAMIC 2
31 #define PT_INTERP 3
32 #define PT_NOTE 4
33 #define PT_SHLIB 5
34 #define PT_PHDR 6
35 #define PT_TLS 7 /* Thread local storage segment */
36 #define PT_LOOS 0x60000000 /* OS-specific */
37 #define PT_HIOS 0x6fffffff /* OS-specific */
38 #define PT_LOPROC 0x70000000
39 #define PT_HIPROC 0x7fffffff
40 #define PT_GNU_EH_FRAME 0x6474e550
41
42 #define PT_GNU_STACK (PT_LOOS + 0x474e551)
43
44 /*
45 * Extended Numbering
46 *
47 * If the real number of program header table entries is larger than
48 * or equal to PN_XNUM(0xffff), it is set to sh_info field of the
49 * section header at index 0, and PN_XNUM is set to e_phnum
50 * field. Otherwise, the section header at index 0 is zero
51 * initialized, if it exists.
52 *
53 * Specifications are available in:
54 *
55 * - Sun microsystems: Linker and Libraries.
56 * Part No: 817-1984-17, September 2008.
57 * URL: http://docs.sun.com/app/docs/doc/817-1984
58 *
59 * - System V ABI AMD64 Architecture Processor Supplement
60 * Draft Version 0.99.,
61 * May 11, 2009.
62 * URL: http://www.x86-64.org/
63 */
64 #define PN_XNUM 0xffff
65
66 /* These constants define the different elf file types */
67 #define ET_NONE 0
68 #define ET_REL 1
69 #define ET_EXEC 2
70 #define ET_DYN 3
71 #define ET_CORE 4
72 #define ET_LOPROC 0xff00
73 #define ET_HIPROC 0xffff
74
75 /* This is the info that is needed to parse the dynamic section of the file */
76 #define DT_NULL 0
77 #define DT_NEEDED 1
78 #define DT_PLTRELSZ 2
79 #define DT_PLTGOT 3
80 #define DT_HASH 4
81 #define DT_STRTAB 5
82 #define DT_SYMTAB 6
83 #define DT_RELA 7
84 #define DT_RELASZ 8
85 #define DT_RELAENT 9
86 #define DT_STRSZ 10
87 #define DT_SYMENT 11
88 #define DT_INIT 12
89 #define DT_FINI 13
90 #define DT_SONAME 14
91 #define DT_RPATH 15
92 #define DT_SYMBOLIC 16
93 #define DT_REL 17
94 #define DT_RELSZ 18
95 #define DT_RELENT 19
96 #define DT_PLTREL 20
97 #define DT_DEBUG 21
98 #define DT_TEXTREL 22
99 #define DT_JMPREL 23
100 #define DT_ENCODING 32
101 #define OLD_DT_LOOS 0x60000000
102 #define DT_LOOS 0x6000000d
103 #define DT_HIOS 0x6ffff000
104 #define DT_VALRNGLO 0x6ffffd00
105 #define DT_VALRNGHI 0x6ffffdff
106 #define DT_ADDRRNGLO 0x6ffffe00
107 #define DT_ADDRRNGHI 0x6ffffeff
108 #define DT_VERSYM 0x6ffffff0
109 #define DT_RELACOUNT 0x6ffffff9
110 #define DT_RELCOUNT 0x6ffffffa
111 #define DT_FLAGS_1 0x6ffffffb
112 #define DT_VERDEF 0x6ffffffc
113 #define DT_VERDEFNUM 0x6ffffffd
114 #define DT_VERNEED 0x6ffffffe
115 #define DT_VERNEEDNUM 0x6fffffff
116 #define OLD_DT_HIOS 0x6fffffff
117 #define DT_LOPROC 0x70000000
118 #define DT_HIPROC 0x7fffffff
119
120 /* This info is needed when parsing the symbol table */
121 #define STB_LOCAL 0
122 #define STB_GLOBAL 1
123 #define STB_WEAK 2
124
125 #define STT_NOTYPE 0
126 #define STT_OBJECT 1
127 #define STT_FUNC 2
128 #define STT_SECTION 3
129 #define STT_FILE 4
130 #define STT_COMMON 5
131 #define STT_TLS 6
132
133 #define ELF_ST_BIND(x) ((x) >> 4)
134 #define ELF_ST_TYPE(x) (((unsigned int) x) & 0xf)
135 #define ELF32_ST_BIND(x) ELF_ST_BIND(x)
136 #define ELF32_ST_TYPE(x) ELF_ST_TYPE(x)
137 #define ELF64_ST_BIND(x) ELF_ST_BIND(x)
138 #define ELF64_ST_TYPE(x) ELF_ST_TYPE(x)
139
140 typedef struct dynamic{
141 Elf32_Sword d_tag;
142 union{
143 Elf32_Sword d_val;
144 Elf32_Addr d_ptr;
145 } d_un;
146 } Elf32_Dyn;
147
148 typedef struct {
149 Elf64_Sxword d_tag; /* entry tag value */
150 union {
151 Elf64_Xword d_val;
152 Elf64_Addr d_ptr;
153 } d_un;
154 } Elf64_Dyn;
155
156 /* The following are used with relocations */
157 #define ELF32_R_SYM(x) ((x) >> 8)
158 #define ELF32_R_TYPE(x) ((x) & 0xff)
159
160 #define ELF64_R_SYM(i) ((i) >> 32)
161 #define ELF64_R_TYPE(i) ((i) & 0xffffffff)
162
163 typedef struct elf32_rel {
164 Elf32_Addr r_offset;
165 Elf32_Word r_info;
166 } Elf32_Rel;
167
168 typedef struct elf64_rel {
169 Elf64_Addr r_offset; /* Location at which to apply the action */
170 Elf64_Xword r_info; /* index and type of relocation */
171 } Elf64_Rel;
172
173 typedef struct elf32_rela{
174 Elf32_Addr r_offset;
175 Elf32_Word r_info;
176 Elf32_Sword r_addend;
177 } Elf32_Rela;
178
179 typedef struct elf64_rela {
180 Elf64_Addr r_offset; /* Location at which to apply the action */
181 Elf64_Xword r_info; /* index and type of relocation */
182 Elf64_Sxword r_addend; /* Constant addend used to compute value */
183 } Elf64_Rela;
184
185 typedef struct elf32_sym{
186 Elf32_Word st_name;
187 Elf32_Addr st_value;
188 Elf32_Word st_size;
189 unsigned char st_info;
190 unsigned char st_other;
191 Elf32_Half st_shndx;
192 } Elf32_Sym;
193
194 typedef struct elf64_sym {
195 Elf64_Word st_name; /* Symbol name, index in string tbl */
196 unsigned char st_info; /* Type and binding attributes */
197 unsigned char st_other; /* No defined meaning, 0 */
198 Elf64_Half st_shndx; /* Associated section index */
199 Elf64_Addr st_value; /* Value of the symbol */
200 Elf64_Xword st_size; /* Associated symbol size */
201 } Elf64_Sym;
202
203
204 #define EI_NIDENT 16
205
206 typedef struct elf32_hdr{
207 unsigned char e_ident[EI_NIDENT];
208 Elf32_Half e_type;
209 Elf32_Half e_machine;
210 Elf32_Word e_version;
211 Elf32_Addr e_entry; /* Entry point */
212 Elf32_Off e_phoff;
213 Elf32_Off e_shoff;
214 Elf32_Word e_flags;
215 Elf32_Half e_ehsize;
216 Elf32_Half e_phentsize;
217 Elf32_Half e_phnum;
218 Elf32_Half e_shentsize;
219 Elf32_Half e_shnum;
220 Elf32_Half e_shstrndx;
221 } Elf32_Ehdr;
222
223 typedef struct elf64_hdr {
224 unsigned char e_ident[EI_NIDENT]; /* ELF "magic number" */
225 Elf64_Half e_type;
226 Elf64_Half e_machine;
227 Elf64_Word e_version;
228 Elf64_Addr e_entry; /* Entry point virtual address */
229 Elf64_Off e_phoff; /* Program header table file offset */
230 Elf64_Off e_shoff; /* Section header table file offset */
231 Elf64_Word e_flags;
232 Elf64_Half e_ehsize;
233 Elf64_Half e_phentsize;
234 Elf64_Half e_phnum;
235 Elf64_Half e_shentsize;
236 Elf64_Half e_shnum;
237 Elf64_Half e_shstrndx;
238 } Elf64_Ehdr;
239
240 /* These constants define the permissions on sections in the program
241 header, p_flags. */
242 #define PF_R 0x4
243 #define PF_W 0x2
244 #define PF_X 0x1
245
246 typedef struct elf32_phdr{
247 Elf32_Word p_type;
248 Elf32_Off p_offset;
249 Elf32_Addr p_vaddr;
250 Elf32_Addr p_paddr;
251 Elf32_Word p_filesz;
252 Elf32_Word p_memsz;
253 Elf32_Word p_flags;
254 Elf32_Word p_align;
255 } Elf32_Phdr;
256
257 typedef struct elf64_phdr {
258 Elf64_Word p_type;
259 Elf64_Word p_flags;
260 Elf64_Off p_offset; /* Segment file offset */
261 Elf64_Addr p_vaddr; /* Segment virtual address */
262 Elf64_Addr p_paddr; /* Segment physical address */
263 Elf64_Xword p_filesz; /* Segment size in file */
264 Elf64_Xword p_memsz; /* Segment size in memory */
265 Elf64_Xword p_align; /* Segment alignment, file & memory */
266 } Elf64_Phdr;
267
268 /* sh_type */
269 #define SHT_NULL 0
270 #define SHT_PROGBITS 1
271 #define SHT_SYMTAB 2
272 #define SHT_STRTAB 3
273 #define SHT_RELA 4
274 #define SHT_HASH 5
275 #define SHT_DYNAMIC 6
276 #define SHT_NOTE 7
277 #define SHT_NOBITS 8
278 #define SHT_REL 9
279 #define SHT_SHLIB 10
280 #define SHT_DYNSYM 11
281 #define SHT_NUM 12
282 #define SHT_LOPROC 0x70000000
283 #define SHT_HIPROC 0x7fffffff
284 #define SHT_LOUSER 0x80000000
285 #define SHT_HIUSER 0xffffffff
286
287 /* sh_flags */
288 #define SHF_WRITE 0x1
289 #define SHF_ALLOC 0x2
290 #define SHF_EXECINSTR 0x4
291 #define SHF_MASKPROC 0xf0000000
292
293 /* special section indexes */
294 #define SHN_UNDEF 0
295 #define SHN_LORESERVE 0xff00
296 #define SHN_LOPROC 0xff00
297 #define SHN_HIPROC 0xff1f
298 #define SHN_ABS 0xfff1
299 #define SHN_COMMON 0xfff2
300 #define SHN_HIRESERVE 0xffff
301
302 typedef struct elf32_shdr {
303 Elf32_Word sh_name;
304 Elf32_Word sh_type;
305 Elf32_Word sh_flags;
306 Elf32_Addr sh_addr;
307 Elf32_Off sh_offset;
308 Elf32_Word sh_size;
309 Elf32_Word sh_link;
310 Elf32_Word sh_info;
311 Elf32_Word sh_addralign;
312 Elf32_Word sh_entsize;
313 } Elf32_Shdr;
314
315 typedef struct elf64_shdr {
316 Elf64_Word sh_name; /* Section name, index in string tbl */
317 Elf64_Word sh_type; /* Type of section */
318 Elf64_Xword sh_flags; /* Miscellaneous section attributes */
319 Elf64_Addr sh_addr; /* Section virtual addr at execution */
320 Elf64_Off sh_offset; /* Section file offset */
321 Elf64_Xword sh_size; /* Size of section in bytes */
322 Elf64_Word sh_link; /* Index of another section */
323 Elf64_Word sh_info; /* Additional section information */
324 Elf64_Xword sh_addralign; /* Section alignment */
325 Elf64_Xword sh_entsize; /* Entry size if section holds table */
326 } Elf64_Shdr;
327
328 #define EI_MAG0 0 /* e_ident[] indexes */
329 #define EI_MAG1 1
330 #define EI_MAG2 2
331 #define EI_MAG3 3
332 #define EI_CLASS 4
333 #define EI_DATA 5
334 #define EI_VERSION 6
335 #define EI_OSABI 7
336 #define EI_PAD 8
337
338 #define ELFMAG0 0x7f /* EI_MAG */
339 #define ELFMAG1 'E'
340 #define ELFMAG2 'L'
341 #define ELFMAG3 'F'
342 #define ELFMAG "\177ELF"
343 #define SELFMAG 4
344
345 #define ELFCLASSNONE 0 /* EI_CLASS */
346 #define ELFCLASS32 1
347 #define ELFCLASS64 2
348 #define ELFCLASSNUM 3
349
350 #define ELFDATANONE 0 /* e_ident[EI_DATA] */
351 #define ELFDATA2LSB 1
352 #define ELFDATA2MSB 2
353
354 #define EV_NONE 0 /* e_version, EI_VERSION */
355 #define EV_CURRENT 1
356 #define EV_NUM 2
357
358 #define ELFOSABI_NONE 0
359 #define ELFOSABI_LINUX 3
360
361 #ifndef ELF_OSABI
362 #define ELF_OSABI ELFOSABI_NONE
363 #endif
364
365 /*
366 * Notes used in ET_CORE. Architectures export some of the arch register sets
367 * using the corresponding note types via the PTRACE_GETREGSET and
368 * PTRACE_SETREGSET requests.
369 */
370 #define NT_PRSTATUS 1
371 #define NT_PRFPREG 2
372 #define NT_PRPSINFO 3
373 #define NT_TASKSTRUCT 4
374 #define NT_AUXV 6
375 #define NT_PRXFPREG 0x46e62b7f /* copied from gdb5.1/include/elf/common.h */
376 #define NT_PPC_VMX 0x100 /* PowerPC Altivec/VMX registers */
377 #define NT_PPC_SPE 0x101 /* PowerPC SPE/EVR registers */
378 #define NT_PPC_VSX 0x102 /* PowerPC VSX registers */
379 #define NT_386_TLS 0x200 /* i386 TLS slots (struct user_desc) */
380 #define NT_386_IOPERM 0x201 /* x86 io permission bitmap (1=deny) */
381 #define NT_X86_XSTATE 0x202 /* x86 extended state using xsave */
382 #define NT_S390_HIGH_GPRS 0x300 /* s390 upper register halves */
383 #define NT_S390_TIMER 0x301 /* s390 timer register */
384 #define NT_S390_TODCMP 0x302 /* s390 TOD clock comparator register */
385 #define NT_S390_TODPREG 0x303 /* s390 TOD programmable register */
386 #define NT_S390_CTRS 0x304 /* s390 control registers */
387 #define NT_S390_PREFIX 0x305 /* s390 prefix register */
388 #define NT_S390_LAST_BREAK 0x306 /* s390 breaking event address */
389 #define NT_S390_SYSTEM_CALL 0x307 /* s390 system call restart data */
390 #define NT_ARM_VFP 0x400 /* ARM VFP/NEON registers */
391
392
393 /* Note header in a PT_NOTE section */
394 typedef struct elf32_note {
395 Elf32_Word n_namesz; /* Name size */
396 Elf32_Word n_descsz; /* Content size */
397 Elf32_Word n_type; /* Content type */
398 } Elf32_Nhdr;
399
400 /* Note header in a PT_NOTE section */
401 typedef struct elf64_note {
402 Elf64_Word n_namesz; /* Name size */
403 Elf64_Word n_descsz; /* Content size */
404 Elf64_Word n_type; /* Content type */
405 } Elf64_Nhdr;
406
407 #ifdef __KERNEL__
408 #ifndef elf_read_implies_exec
409 /* Executables for which elf_read_implies_exec() returns TRUE will
410 have the READ_IMPLIES_EXEC personality flag set automatically.
411 Override in asm/elf.h as needed. */
412 # define elf_read_implies_exec(ex, have_pt_gnu_stack) 0
413 #endif
414
415 #if ELF_CLASS == ELFCLASS32
416
417 extern Elf32_Dyn _DYNAMIC [];
418 #define elfhdr elf32_hdr
419 #define elf_phdr elf32_phdr
420 #define elf_shdr elf32_shdr
421 #define elf_note elf32_note
422 #define elf_addr_t Elf32_Off
423 #define Elf_Half Elf32_Half
424
425 #else
426
427 extern Elf64_Dyn _DYNAMIC [];
428 #define elfhdr elf64_hdr
429 #define elf_phdr elf64_phdr
430 #define elf_shdr elf64_shdr
431 #define elf_note elf64_note
432 #define elf_addr_t Elf64_Off
433 #define Elf_Half Elf64_Half
434
435 #endif
436
437 /* Optional callbacks to write extra ELF notes. */
438 struct file;
439
440 #ifndef ARCH_HAVE_EXTRA_ELF_NOTES
elf_coredump_extra_notes_size(void)441 static inline int elf_coredump_extra_notes_size(void) { return 0; }
elf_coredump_extra_notes_write(struct file * file,loff_t * foffset)442 static inline int elf_coredump_extra_notes_write(struct file *file,
443 loff_t *foffset) { return 0; }
444 #else
445 extern int elf_coredump_extra_notes_size(void);
446 extern int elf_coredump_extra_notes_write(struct file *file, loff_t *foffset);
447 #endif
448 #endif /* __KERNEL__ */
449 #endif /* _LINUX_ELF_H */
450