Line data Source code
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 : /* These constants define the different elf file types */
54 : #define ET_NONE 0
55 : #define ET_REL 1
56 : #define ET_EXEC 2
57 : #define ET_DYN 3
58 : #define ET_CORE 4
59 : #define ET_LOPROC 0xff00
60 : #define ET_HIPROC 0xffff
61 :
62 : /* This is the info that is needed to parse the dynamic section of the file */
63 : #define DT_NULL 0
64 : #define DT_NEEDED 1
65 : #define DT_PLTRELSZ 2
66 : #define DT_PLTGOT 3
67 : #define DT_HASH 4
68 : #define DT_STRTAB 5
69 : #define DT_SYMTAB 6
70 : #define DT_RELA 7
71 : #define DT_RELASZ 8
72 : #define DT_RELAENT 9
73 : #define DT_STRSZ 10
74 : #define DT_SYMENT 11
75 : #define DT_INIT 12
76 : #define DT_FINI 13
77 : #define DT_SONAME 14
78 : #define DT_RPATH 15
79 : #define DT_SYMBOLIC 16
80 : #define DT_REL 17
81 : #define DT_RELSZ 18
82 : #define DT_RELENT 19
83 : #define DT_PLTREL 20
84 : #define DT_DEBUG 21
85 : #define DT_TEXTREL 22
86 : #define DT_JMPREL 23
87 : #define DT_ENCODING 32
88 : #define OLD_DT_LOOS 0x60000000
89 : #define DT_LOOS 0x6000000d
90 : #define DT_HIOS 0x6ffff000
91 : #define DT_VALRNGLO 0x6ffffd00
92 : #define DT_VALRNGHI 0x6ffffdff
93 : #define DT_ADDRRNGLO 0x6ffffe00
94 : #define DT_ADDRRNGHI 0x6ffffeff
95 : #define DT_VERSYM 0x6ffffff0
96 : #define DT_RELACOUNT 0x6ffffff9
97 : #define DT_RELCOUNT 0x6ffffffa
98 : #define DT_FLAGS_1 0x6ffffffb
99 : #define DT_VERDEF 0x6ffffffc
100 : #define DT_VERDEFNUM 0x6ffffffd
101 : #define DT_VERNEED 0x6ffffffe
102 : #define DT_VERNEEDNUM 0x6fffffff
103 : #define OLD_DT_HIOS 0x6fffffff
104 : #define DT_LOPROC 0x70000000
105 : #define DT_HIPROC 0x7fffffff
106 :
107 : /* This info is needed when parsing the symbol table */
108 : #define STB_LOCAL 0
109 : #define STB_GLOBAL 1
110 : #define STB_WEAK 2
111 :
112 : #define STT_NOTYPE 0
113 : #define STT_OBJECT 1
114 : #define STT_FUNC 2
115 : #define STT_SECTION 3
116 : #define STT_FILE 4
117 : #define STT_COMMON 5
118 : #define STT_TLS 6
119 :
120 : #define ELF_ST_BIND(x) ((x) >> 4)
121 : #define ELF_ST_TYPE(x) (((unsigned int) x) & 0xf)
122 : #define ELF32_ST_BIND(x) ELF_ST_BIND(x)
123 : #define ELF32_ST_TYPE(x) ELF_ST_TYPE(x)
124 : #define ELF64_ST_BIND(x) ELF_ST_BIND(x)
125 : #define ELF64_ST_TYPE(x) ELF_ST_TYPE(x)
126 :
127 : typedef struct dynamic{
128 : Elf32_Sword d_tag;
129 : union{
130 : Elf32_Sword d_val;
131 : Elf32_Addr d_ptr;
132 : } d_un;
133 : } Elf32_Dyn;
134 :
135 : typedef struct {
136 : Elf64_Sxword d_tag; /* entry tag value */
137 : union {
138 : Elf64_Xword d_val;
139 : Elf64_Addr d_ptr;
140 : } d_un;
141 : } Elf64_Dyn;
142 :
143 : /* The following are used with relocations */
144 : #define ELF32_R_SYM(x) ((x) >> 8)
145 : #define ELF32_R_TYPE(x) ((x) & 0xff)
146 :
147 : #define ELF64_R_SYM(i) ((i) >> 32)
148 : #define ELF64_R_TYPE(i) ((i) & 0xffffffff)
149 :
150 : typedef struct elf32_rel {
151 : Elf32_Addr r_offset;
152 : Elf32_Word r_info;
153 : } Elf32_Rel;
154 :
155 : typedef struct elf64_rel {
156 : Elf64_Addr r_offset; /* Location at which to apply the action */
157 : Elf64_Xword r_info; /* index and type of relocation */
158 : } Elf64_Rel;
159 :
160 : typedef struct elf32_rela{
161 : Elf32_Addr r_offset;
162 : Elf32_Word r_info;
163 : Elf32_Sword r_addend;
164 : } Elf32_Rela;
165 :
166 : typedef struct elf64_rela {
167 : Elf64_Addr r_offset; /* Location at which to apply the action */
168 : Elf64_Xword r_info; /* index and type of relocation */
169 : Elf64_Sxword r_addend; /* Constant addend used to compute value */
170 : } Elf64_Rela;
171 :
172 : typedef struct elf32_sym{
173 : Elf32_Word st_name;
174 : Elf32_Addr st_value;
175 : Elf32_Word st_size;
176 : unsigned char st_info;
177 : unsigned char st_other;
178 : Elf32_Half st_shndx;
179 : } Elf32_Sym;
180 :
181 : typedef struct elf64_sym {
182 : Elf64_Word st_name; /* Symbol name, index in string tbl */
183 : unsigned char st_info; /* Type and binding attributes */
184 : unsigned char st_other; /* No defined meaning, 0 */
185 : Elf64_Half st_shndx; /* Associated section index */
186 : Elf64_Addr st_value; /* Value of the symbol */
187 : Elf64_Xword st_size; /* Associated symbol size */
188 : } Elf64_Sym;
189 :
190 :
191 : #define EI_NIDENT 16
192 :
193 : typedef struct elf32_hdr{
194 : unsigned char e_ident[EI_NIDENT];
195 : Elf32_Half e_type;
196 : Elf32_Half e_machine;
197 : Elf32_Word e_version;
198 : Elf32_Addr e_entry; /* Entry point */
199 : Elf32_Off e_phoff;
200 : Elf32_Off e_shoff;
201 : Elf32_Word e_flags;
202 : Elf32_Half e_ehsize;
203 : Elf32_Half e_phentsize;
204 : Elf32_Half e_phnum;
205 : Elf32_Half e_shentsize;
206 : Elf32_Half e_shnum;
207 : Elf32_Half e_shstrndx;
208 : } Elf32_Ehdr;
209 :
210 : typedef struct elf64_hdr {
211 : unsigned char e_ident[EI_NIDENT]; /* ELF "magic number" */
212 : Elf64_Half e_type;
213 : Elf64_Half e_machine;
214 : Elf64_Word e_version;
215 : Elf64_Addr e_entry; /* Entry point virtual address */
216 : Elf64_Off e_phoff; /* Program header table file offset */
217 : Elf64_Off e_shoff; /* Section header table file offset */
218 : Elf64_Word e_flags;
219 : Elf64_Half e_ehsize;
220 : Elf64_Half e_phentsize;
221 : Elf64_Half e_phnum;
222 : Elf64_Half e_shentsize;
223 : Elf64_Half e_shnum;
224 : Elf64_Half e_shstrndx;
225 : } Elf64_Ehdr;
226 :
227 : /* These constants define the permissions on sections in the program
228 : header, p_flags. */
229 : #define PF_R 0x4
230 : #define PF_W 0x2
231 : #define PF_X 0x1
232 :
233 : typedef struct elf32_phdr{
234 : Elf32_Word p_type;
235 : Elf32_Off p_offset;
236 : Elf32_Addr p_vaddr;
237 : Elf32_Addr p_paddr;
238 : Elf32_Word p_filesz;
239 : Elf32_Word p_memsz;
240 : Elf32_Word p_flags;
241 : Elf32_Word p_align;
242 : } Elf32_Phdr;
243 :
244 : typedef struct elf64_phdr {
245 : Elf64_Word p_type;
246 : Elf64_Word p_flags;
247 : Elf64_Off p_offset; /* Segment file offset */
248 : Elf64_Addr p_vaddr; /* Segment virtual address */
249 : Elf64_Addr p_paddr; /* Segment physical address */
250 : Elf64_Xword p_filesz; /* Segment size in file */
251 : Elf64_Xword p_memsz; /* Segment size in memory */
252 : Elf64_Xword p_align; /* Segment alignment, file & memory */
253 : } Elf64_Phdr;
254 :
255 : /* sh_type */
256 : #define SHT_NULL 0
257 : #define SHT_PROGBITS 1
258 : #define SHT_SYMTAB 2
259 : #define SHT_STRTAB 3
260 : #define SHT_RELA 4
261 : #define SHT_HASH 5
262 : #define SHT_DYNAMIC 6
263 : #define SHT_NOTE 7
264 : #define SHT_NOBITS 8
265 : #define SHT_REL 9
266 : #define SHT_SHLIB 10
267 : #define SHT_DYNSYM 11
268 : #define SHT_NUM 12
269 : #define SHT_LOPROC 0x70000000
270 : #define SHT_HIPROC 0x7fffffff
271 : #define SHT_LOUSER 0x80000000
272 : #define SHT_HIUSER 0xffffffff
273 :
274 : /* sh_flags */
275 : #define SHF_WRITE 0x1
276 : #define SHF_ALLOC 0x2
277 : #define SHF_EXECINSTR 0x4
278 : #define SHF_MASKPROC 0xf0000000
279 :
280 : /* special section indexes */
281 : #define SHN_UNDEF 0
282 : #define SHN_LORESERVE 0xff00
283 : #define SHN_LOPROC 0xff00
284 : #define SHN_HIPROC 0xff1f
285 : #define SHN_ABS 0xfff1
286 : #define SHN_COMMON 0xfff2
287 : #define SHN_HIRESERVE 0xffff
288 :
289 : typedef struct {
290 : Elf32_Word sh_name;
291 : Elf32_Word sh_type;
292 : Elf32_Word sh_flags;
293 : Elf32_Addr sh_addr;
294 : Elf32_Off sh_offset;
295 : Elf32_Word sh_size;
296 : Elf32_Word sh_link;
297 : Elf32_Word sh_info;
298 : Elf32_Word sh_addralign;
299 : Elf32_Word sh_entsize;
300 : } Elf32_Shdr;
301 :
302 : typedef struct elf64_shdr {
303 : Elf64_Word sh_name; /* Section name, index in string tbl */
304 : Elf64_Word sh_type; /* Type of section */
305 : Elf64_Xword sh_flags; /* Miscellaneous section attributes */
306 : Elf64_Addr sh_addr; /* Section virtual addr at execution */
307 : Elf64_Off sh_offset; /* Section file offset */
308 : Elf64_Xword sh_size; /* Size of section in bytes */
309 : Elf64_Word sh_link; /* Index of another section */
310 : Elf64_Word sh_info; /* Additional section information */
311 : Elf64_Xword sh_addralign; /* Section alignment */
312 : Elf64_Xword sh_entsize; /* Entry size if section holds table */
313 : } Elf64_Shdr;
314 :
315 : #define EI_MAG0 0 /* e_ident[] indexes */
316 : #define EI_MAG1 1
317 : #define EI_MAG2 2
318 : #define EI_MAG3 3
319 : #define EI_CLASS 4
320 : #define EI_DATA 5
321 : #define EI_VERSION 6
322 : #define EI_OSABI 7
323 : #define EI_PAD 8
324 :
325 : #define ELFMAG0 0x7f /* EI_MAG */
326 : #define ELFMAG1 'E'
327 : #define ELFMAG2 'L'
328 : #define ELFMAG3 'F'
329 : #define ELFMAG "\177ELF"
330 : #define SELFMAG 4
331 :
332 : #define ELFCLASSNONE 0 /* EI_CLASS */
333 : #define ELFCLASS32 1
334 : #define ELFCLASS64 2
335 : #define ELFCLASSNUM 3
336 :
337 : #define ELFDATANONE 0 /* e_ident[EI_DATA] */
338 : #define ELFDATA2LSB 1
339 : #define ELFDATA2MSB 2
340 :
341 : #define EV_NONE 0 /* e_version, EI_VERSION */
342 : #define EV_CURRENT 1
343 : #define EV_NUM 2
344 :
345 : #define ELFOSABI_NONE 0
346 : #define ELFOSABI_LINUX 3
347 :
348 : #ifndef ELF_OSABI
349 : #define ELF_OSABI ELFOSABI_NONE
350 : #endif
351 :
352 : /* Notes used in ET_CORE */
353 : #define NT_PRSTATUS 1
354 : #define NT_PRFPREG 2
355 : #define NT_PRPSINFO 3
356 : #define NT_TASKSTRUCT 4
357 : #define NT_AUXV 6
358 : #define NT_PRXFPREG 0x46e62b7f /* copied from gdb5.1/include/elf/common.h */
359 : #define NT_PPC_VMX 0x100 /* PowerPC Altivec/VMX registers */
360 : #define NT_PPC_SPE 0x101 /* PowerPC SPE/EVR registers */
361 : #define NT_PPC_VSX 0x102 /* PowerPC VSX registers */
362 : #define NT_386_TLS 0x200 /* i386 TLS slots (struct user_desc) */
363 : #define NT_386_IOPERM 0x201 /* x86 io permission bitmap (1=deny) */
364 : #define NT_S390_HIGH_GPRS 0x300 /* s390 upper register halves */
365 :
366 :
367 : /* Note header in a PT_NOTE section */
368 : typedef struct elf32_note {
369 : Elf32_Word n_namesz; /* Name size */
370 : Elf32_Word n_descsz; /* Content size */
371 : Elf32_Word n_type; /* Content type */
372 : } Elf32_Nhdr;
373 :
374 : /* Note header in a PT_NOTE section */
375 : typedef struct elf64_note {
376 : Elf64_Word n_namesz; /* Name size */
377 : Elf64_Word n_descsz; /* Content size */
378 : Elf64_Word n_type; /* Content type */
379 : } Elf64_Nhdr;
380 :
381 : #ifdef __KERNEL__
382 : #if ELF_CLASS == ELFCLASS32
383 :
384 : extern Elf32_Dyn _DYNAMIC [];
385 : #define elfhdr elf32_hdr
386 : #define elf_phdr elf32_phdr
387 : #define elf_note elf32_note
388 : #define elf_addr_t Elf32_Off
389 :
390 : #else
391 :
392 : extern Elf64_Dyn _DYNAMIC [];
393 : #define elfhdr elf64_hdr
394 : #define elf_phdr elf64_phdr
395 : #define elf_note elf64_note
396 : #define elf_addr_t Elf64_Off
397 :
398 : #endif
399 :
400 : /* Optional callbacks to write extra ELF notes. */
401 : #ifndef ARCH_HAVE_EXTRA_ELF_NOTES
402 : static inline int elf_coredump_extra_notes_size(void) { return 0; }
403 : static inline int elf_coredump_extra_notes_write(struct file *file,
404 : loff_t *foffset) { return 0; }
405 : #else
406 1 : extern int elf_coredump_extra_notes_size(void);
407 : extern int elf_coredump_extra_notes_write(struct file *file, loff_t *foffset);
408 : #endif
409 : #endif /* __KERNEL__ */
410 : #endif /* _LINUX_ELF_H */
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