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