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 struct file;
11
12 #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. */
20 typedef __u32 Elf32_Addr;
21 typedef __u16 Elf32_Half;
22 typedef __u32 Elf32_Off;
23 typedef __s32 Elf32_Sword;
24 typedef __u32 Elf32_Word;
25
26 /* 64-bit ELF base types. */
27 typedef __u64 Elf64_Addr;
28 typedef __u16 Elf64_Half;
29 typedef __s16 Elf64_SHalf;
30 typedef __u64 Elf64_Off;
31 typedef __s32 Elf64_Sword;
32 typedef __u32 Elf64_Word;
33 typedef __u64 Elf64_Xword;
34 typedef __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
53 /*
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
75 /* 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
84 /* 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
109 #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
126 #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
139 #define STT_COMMON 5
140 #define STT_TLS 6
141
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
149 typedef 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
157 typedef 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
172 typedef struct elf32_rel {
173 Elf32_Addr r_offset;
174 Elf32_Word r_info;
175 } Elf32_Rel;
176
177 typedef 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
182 typedef struct elf32_rela{
183 Elf32_Addr r_offset;
184 Elf32_Word r_info;
185 Elf32_Sword r_addend;
186 } Elf32_Rela;
187
188 typedef 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
194 typedef 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
203 typedef 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
215 typedef 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
232 typedef struct elf64_hdr {
233 unsigned char e_ident[EI_NIDENT]; /* ELF "magic number" */
234 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
255 typedef 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
266 typedef 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
311 typedef struct elf32_shdr {
312 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
324 typedef 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
374 /*
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 */
379 #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 */
385 #define NT_PPC_VMX 0x100 /* PowerPC Altivec/VMX registers */
386 #define NT_PPC_SPE 0x101 /* PowerPC SPE/EVR registers */
387 #define NT_PPC_VSX 0x102 /* PowerPC VSX registers */
388 #define NT_386_TLS 0x200 /* i386 TLS slots (struct user_desc) */
389 #define NT_386_IOPERM 0x201 /* x86 io permission bitmap (1=deny) */
390 #define NT_X86_XSTATE 0x202 /* x86 extended state using xsave */
391 #define NT_S390_HIGH_GPRS 0x300 /* s390 upper register halves */
392 #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 */
397 #define NT_S390_LAST_BREAK 0x306 /* s390 breaking event address */
398
399
400 /* Note header in a PT_NOTE section */
401 typedef struct elf32_note {
402 Elf32_Word n_namesz; /* Name size */
403 Elf32_Word n_descsz; /* Content size */
404 Elf32_Word n_type; /* Content type */
405 } Elf32_Nhdr;
406
407 /* Note header in a PT_NOTE section */
408 typedef struct elf64_note {
409 Elf64_Word n_namesz; /* Name size */
410 Elf64_Word n_descsz; /* Content size */
411 Elf64_Word n_type; /* Content type */
412 } Elf64_Nhdr;
413
414 #ifdef __KERNEL__
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 #ifndef ARCH_HAVE_EXTRA_ELF_NOTES
elf_coredump_extra_notes_size(void)439 static inline int elf_coredump_extra_notes_size(void) { return 0; }
elf_coredump_extra_notes_write(struct file * file,loff_t * foffset)440 static inline int elf_coredump_extra_notes_write(struct file *file,
441 loff_t *foffset) { return 0; }
442 #else
443 extern int elf_coredump_extra_notes_size(void);
444 extern int elf_coredump_extra_notes_write(struct file *file, loff_t *foffset);
445 #endif
446 #endif /* __KERNEL__ */
447 #endif /* _LINUX_ELF_H */
448