FreeBSD/Linux Kernel Cross Reference
sys/sys/elf_common.h
1 /*-
2 * Copyright (c) 1998 John D. Polstra.
3 * All rights reserved.
4 *
5 * Redistribution and use in source and binary forms, with or without
6 * modification, are permitted provided that the following conditions
7 * are met:
8 * 1. Redistributions of source code must retain the above copyright
9 * notice, this list of conditions and the following disclaimer.
10 * 2. Redistributions in binary form must reproduce the above copyright
11 * notice, this list of conditions and the following disclaimer in the
12 * documentation and/or other materials provided with the distribution.
13 *
14 * THIS SOFTWARE IS PROVIDED BY THE AUTHOR AND CONTRIBUTORS ``AS IS'' AND
15 * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
16 * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
17 * ARE DISCLAIMED. IN NO EVENT SHALL THE AUTHOR OR CONTRIBUTORS BE LIABLE
18 * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
19 * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS
20 * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
21 * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
22 * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY
23 * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
24 * SUCH DAMAGE.
25 *
26 * $FreeBSD: releng/6.2/sys/sys/elf_common.h 164286 2006-11-14 20:42:41Z cvs2svn $
27 */
28
29 #ifndef _SYS_ELF_COMMON_H_
30 #define _SYS_ELF_COMMON_H_ 1
31
32 /*
33 * ELF definitions that are independent of architecture or word size.
34 */
35
36 /*
37 * Note header. The ".note" section contains an array of notes. Each
38 * begins with this header, aligned to a word boundary. Immediately
39 * following the note header is n_namesz bytes of name, padded to the
40 * next word boundary. Then comes n_descsz bytes of descriptor, again
41 * padded to a word boundary. The values of n_namesz and n_descsz do
42 * not include the padding.
43 */
44
45 typedef struct {
46 u_int32_t n_namesz; /* Length of name. */
47 u_int32_t n_descsz; /* Length of descriptor. */
48 u_int32_t n_type; /* Type of this note. */
49 } Elf_Note;
50
51 /* Indexes into the e_ident array. Keep synced with
52 http://www.sco.com/developer/gabi/ch4.eheader.html */
53 #define EI_MAG0 0 /* Magic number, byte 0. */
54 #define EI_MAG1 1 /* Magic number, byte 1. */
55 #define EI_MAG2 2 /* Magic number, byte 2. */
56 #define EI_MAG3 3 /* Magic number, byte 3. */
57 #define EI_CLASS 4 /* Class of machine. */
58 #define EI_DATA 5 /* Data format. */
59 #define EI_VERSION 6 /* ELF format version. */
60 #define EI_OSABI 7 /* Operating system / ABI identification */
61 #define EI_ABIVERSION 8 /* ABI version */
62 #define OLD_EI_BRAND 8 /* Start of architecture identification. */
63 #define EI_PAD 9 /* Start of padding (per SVR4 ABI). */
64 #define EI_NIDENT 16 /* Size of e_ident array. */
65
66 /* Values for the magic number bytes. */
67 #define ELFMAG0 0x7f
68 #define ELFMAG1 'E'
69 #define ELFMAG2 'L'
70 #define ELFMAG3 'F'
71 #define ELFMAG "\177ELF" /* magic string */
72 #define SELFMAG 4 /* magic string size */
73
74 /* Values for e_ident[EI_VERSION] and e_version. */
75 #define EV_NONE 0
76 #define EV_CURRENT 1
77
78 /* Values for e_ident[EI_CLASS]. */
79 #define ELFCLASSNONE 0 /* Unknown class. */
80 #define ELFCLASS32 1 /* 32-bit architecture. */
81 #define ELFCLASS64 2 /* 64-bit architecture. */
82
83 /* Values for e_ident[EI_DATA]. */
84 #define ELFDATANONE 0 /* Unknown data format. */
85 #define ELFDATA2LSB 1 /* 2's complement little-endian. */
86 #define ELFDATA2MSB 2 /* 2's complement big-endian. */
87
88 /* Values for e_ident[EI_OSABI]. */
89 #define ELFOSABI_NONE 0 /* UNIX System V ABI */
90 #define ELFOSABI_HPUX 1 /* HP-UX operating system */
91 #define ELFOSABI_NETBSD 2 /* NetBSD */
92 #define ELFOSABI_LINUX 3 /* GNU/Linux */
93 #define ELFOSABI_HURD 4 /* GNU/Hurd */
94 #define ELFOSABI_86OPEN 5 /* 86Open common IA32 ABI */
95 #define ELFOSABI_SOLARIS 6 /* Solaris */
96 #define ELFOSABI_AIX 7 /* AIX */
97 #define ELFOSABI_IRIX 8 /* IRIX */
98 #define ELFOSABI_FREEBSD 9 /* FreeBSD */
99 #define ELFOSABI_TRU64 10 /* TRU64 UNIX */
100 #define ELFOSABI_MODESTO 11 /* Novell Modesto */
101 #define ELFOSABI_OPENBSD 12 /* OpenBSD */
102 #define ELFOSABI_OPENVMS 13 /* Open VMS */
103 #define ELFOSABI_NSK 14 /* HP Non-Stop Kernel */
104 #define ELFOSABI_ARM 97 /* ARM */
105 #define ELFOSABI_STANDALONE 255 /* Standalone (embedded) application */
106
107 #define ELFOSABI_SYSV ELFOSABI_NONE /* symbol used in old spec */
108 #define ELFOSABI_MONTEREY ELFOSABI_AIX /* Monterey */
109
110 /* e_ident */
111 #define IS_ELF(ehdr) ((ehdr).e_ident[EI_MAG0] == ELFMAG0 && \
112 (ehdr).e_ident[EI_MAG1] == ELFMAG1 && \
113 (ehdr).e_ident[EI_MAG2] == ELFMAG2 && \
114 (ehdr).e_ident[EI_MAG3] == ELFMAG3)
115
116 /* Values for e_type. */
117 #define ET_NONE 0 /* Unknown type. */
118 #define ET_REL 1 /* Relocatable. */
119 #define ET_EXEC 2 /* Executable. */
120 #define ET_DYN 3 /* Shared object. */
121 #define ET_CORE 4 /* Core file. */
122 #define ET_LOOS 0xfe00 /* First operating system specific. */
123 #define ET_HIOS 0xfeff /* Last operating system-specific. */
124 #define ET_LOPROC 0xff00 /* First processor-specific. */
125 #define ET_HIPROC 0xffff /* Last processor-specific. */
126
127 /* Values for e_machine. */
128 #define EM_NONE 0 /* Unknown machine. */
129 #define EM_M32 1 /* AT&T WE32100. */
130 #define EM_SPARC 2 /* Sun SPARC. */
131 #define EM_386 3 /* Intel i386. */
132 #define EM_68K 4 /* Motorola 68000. */
133 #define EM_88K 5 /* Motorola 88000. */
134 #define EM_860 7 /* Intel i860. */
135 #define EM_MIPS 8 /* MIPS R3000 Big-Endian only. */
136 #define EM_S370 9 /* IBM System/370. */
137 #define EM_MIPS_RS3_LE 10 /* MIPS R3000 Little-Endian. */
138 #define EM_PARISC 15 /* HP PA-RISC. */
139 #define EM_VPP500 17 /* Fujitsu VPP500. */
140 #define EM_SPARC32PLUS 18 /* SPARC v8plus. */
141 #define EM_960 19 /* Intel 80960. */
142 #define EM_PPC 20 /* PowerPC 32-bit. */
143 #define EM_PPC64 21 /* PowerPC 64-bit. */
144 #define EM_S390 22 /* IBM System/390. */
145 #define EM_V800 36 /* NEC V800. */
146 #define EM_FR20 37 /* Fujitsu FR20. */
147 #define EM_RH32 38 /* TRW RH-32. */
148 #define EM_RCE 39 /* Motorola RCE. */
149 #define EM_ARM 40 /* ARM. */
150 #define EM_SH 42 /* Hitachi SH. */
151 #define EM_SPARCV9 43 /* SPARC v9 64-bit. */
152 #define EM_TRICORE 44 /* Siemens TriCore embedded processor. */
153 #define EM_ARC 45 /* Argonaut RISC Core. */
154 #define EM_H8_300 46 /* Hitachi H8/300. */
155 #define EM_H8_300H 47 /* Hitachi H8/300H. */
156 #define EM_H8S 48 /* Hitachi H8S. */
157 #define EM_H8_500 49 /* Hitachi H8/500. */
158 #define EM_IA_64 50 /* Intel IA-64 Processor. */
159 #define EM_MIPS_X 51 /* Stanford MIPS-X. */
160 #define EM_COLDFIRE 52 /* Motorola ColdFire. */
161 #define EM_68HC12 53 /* Motorola M68HC12. */
162 #define EM_MMA 54 /* Fujitsu MMA. */
163 #define EM_PCP 55 /* Siemens PCP. */
164 #define EM_NCPU 56 /* Sony nCPU. */
165 #define EM_NDR1 57 /* Denso NDR1 microprocessor. */
166 #define EM_STARCORE 58 /* Motorola Star*Core processor. */
167 #define EM_ME16 59 /* Toyota ME16 processor. */
168 #define EM_ST100 60 /* STMicroelectronics ST100 processor. */
169 #define EM_TINYJ 61 /* Advanced Logic Corp. TinyJ processor. */
170 #define EM_X86_64 62 /* Advanced Micro Devices x86-64 */
171
172 /* Non-standard or deprecated. */
173 #define EM_486 6 /* Intel i486. */
174 #define EM_MIPS_RS4_BE 10 /* MIPS R4000 Big-Endian */
175 #define EM_ALPHA_STD 41 /* Digital Alpha (standard value). */
176 #define EM_ALPHA 0x9026 /* Alpha (written in the absence of an ABI) */
177
178 /* Special section indexes. */
179 #define SHN_UNDEF 0 /* Undefined, missing, irrelevant. */
180 #define SHN_LORESERVE 0xff00 /* First of reserved range. */
181 #define SHN_LOPROC 0xff00 /* First processor-specific. */
182 #define SHN_HIPROC 0xff1f /* Last processor-specific. */
183 #define SHN_LOOS 0xff20 /* First operating system-specific. */
184 #define SHN_HIOS 0xff3f /* Last operating system-specific. */
185 #define SHN_ABS 0xfff1 /* Absolute values. */
186 #define SHN_COMMON 0xfff2 /* Common data. */
187 #define SHN_XINDEX 0xffff /* Escape -- index stored elsewhere. */
188 #define SHN_HIRESERVE 0xffff /* Last of reserved range. */
189
190 /* sh_type */
191 #define SHT_NULL 0 /* inactive */
192 #define SHT_PROGBITS 1 /* program defined information */
193 #define SHT_SYMTAB 2 /* symbol table section */
194 #define SHT_STRTAB 3 /* string table section */
195 #define SHT_RELA 4 /* relocation section with addends */
196 #define SHT_HASH 5 /* symbol hash table section */
197 #define SHT_DYNAMIC 6 /* dynamic section */
198 #define SHT_NOTE 7 /* note section */
199 #define SHT_NOBITS 8 /* no space section */
200 #define SHT_REL 9 /* relocation section - no addends */
201 #define SHT_SHLIB 10 /* reserved - purpose unknown */
202 #define SHT_DYNSYM 11 /* dynamic symbol table section */
203 #define SHT_INIT_ARRAY 14 /* Initialization function pointers. */
204 #define SHT_FINI_ARRAY 15 /* Termination function pointers. */
205 #define SHT_PREINIT_ARRAY 16 /* Pre-initialization function ptrs. */
206 #define SHT_GROUP 17 /* Section group. */
207 #define SHT_SYMTAB_SHNDX 18 /* Section indexes (see SHN_XINDEX). */
208 #define SHT_LOOS 0x60000000 /* First of OS specific semantics */
209 #define SHT_HIOS 0x6fffffff /* Last of OS specific semantics */
210 #define SHT_LOPROC 0x70000000 /* reserved range for processor */
211 #define SHT_HIPROC 0x7fffffff /* specific section header types */
212 #define SHT_LOUSER 0x80000000 /* reserved range for application */
213 #define SHT_HIUSER 0xffffffff /* specific indexes */
214
215 /* Flags for sh_flags. */
216 #define SHF_WRITE 0x1 /* Section contains writable data. */
217 #define SHF_ALLOC 0x2 /* Section occupies memory. */
218 #define SHF_EXECINSTR 0x4 /* Section contains instructions. */
219 #define SHF_MERGE 0x10 /* Section may be merged. */
220 #define SHF_STRINGS 0x20 /* Section contains strings. */
221 #define SHF_INFO_LINK 0x40 /* sh_info holds section index. */
222 #define SHF_LINK_ORDER 0x80 /* Special ordering requirements. */
223 #define SHF_OS_NONCONFORMING 0x100 /* OS-specific processing required. */
224 #define SHF_GROUP 0x200 /* Member of section group. */
225 #define SHF_TLS 0x400 /* Section contains TLS data. */
226 #define SHF_MASKOS 0x0ff00000 /* OS-specific semantics. */
227 #define SHF_MASKPROC 0xf0000000 /* Processor-specific semantics. */
228
229 /* Values for p_type. */
230 #define PT_NULL 0 /* Unused entry. */
231 #define PT_LOAD 1 /* Loadable segment. */
232 #define PT_DYNAMIC 2 /* Dynamic linking information segment. */
233 #define PT_INTERP 3 /* Pathname of interpreter. */
234 #define PT_NOTE 4 /* Auxiliary information. */
235 #define PT_SHLIB 5 /* Reserved (not used). */
236 #define PT_PHDR 6 /* Location of program header itself. */
237 #define PT_TLS 7 /* Thread local storage segment */
238 #define PT_LOOS 0x60000000 /* First OS-specific. */
239 #define PT_HIOS 0x6fffffff /* Last OS-specific. */
240 #define PT_LOPROC 0x70000000 /* First processor-specific type. */
241 #define PT_HIPROC 0x7fffffff /* Last processor-specific type. */
242
243 /* Values for p_flags. */
244 #define PF_X 0x1 /* Executable. */
245 #define PF_W 0x2 /* Writable. */
246 #define PF_R 0x4 /* Readable. */
247 #define PF_MASKOS 0x0ff00000 /* Operating system-specific. */
248 #define PF_MASKPROC 0xf0000000 /* Processor-specific. */
249
250 /* Values for d_tag. */
251 #define DT_NULL 0 /* Terminating entry. */
252 #define DT_NEEDED 1 /* String table offset of a needed shared
253 library. */
254 #define DT_PLTRELSZ 2 /* Total size in bytes of PLT relocations. */
255 #define DT_PLTGOT 3 /* Processor-dependent address. */
256 #define DT_HASH 4 /* Address of symbol hash table. */
257 #define DT_STRTAB 5 /* Address of string table. */
258 #define DT_SYMTAB 6 /* Address of symbol table. */
259 #define DT_RELA 7 /* Address of ElfNN_Rela relocations. */
260 #define DT_RELASZ 8 /* Total size of ElfNN_Rela relocations. */
261 #define DT_RELAENT 9 /* Size of each ElfNN_Rela relocation entry. */
262 #define DT_STRSZ 10 /* Size of string table. */
263 #define DT_SYMENT 11 /* Size of each symbol table entry. */
264 #define DT_INIT 12 /* Address of initialization function. */
265 #define DT_FINI 13 /* Address of finalization function. */
266 #define DT_SONAME 14 /* String table offset of shared object
267 name. */
268 #define DT_RPATH 15 /* String table offset of library path. [sup] */
269 #define DT_SYMBOLIC 16 /* Indicates "symbolic" linking. [sup] */
270 #define DT_REL 17 /* Address of ElfNN_Rel relocations. */
271 #define DT_RELSZ 18 /* Total size of ElfNN_Rel relocations. */
272 #define DT_RELENT 19 /* Size of each ElfNN_Rel relocation. */
273 #define DT_PLTREL 20 /* Type of relocation used for PLT. */
274 #define DT_DEBUG 21 /* Reserved (not used). */
275 #define DT_TEXTREL 22 /* Indicates there may be relocations in
276 non-writable segments. [sup] */
277 #define DT_JMPREL 23 /* Address of PLT relocations. */
278 #define DT_BIND_NOW 24 /* [sup] */
279 #define DT_INIT_ARRAY 25 /* Address of the array of pointers to
280 initialization functions */
281 #define DT_FINI_ARRAY 26 /* Address of the array of pointers to
282 termination functions */
283 #define DT_INIT_ARRAYSZ 27 /* Size in bytes of the array of
284 initialization functions. */
285 #define DT_FINI_ARRAYSZ 28 /* Size in bytes of the array of
286 terminationfunctions. */
287 #define DT_RUNPATH 29 /* String table offset of a null-terminated
288 library search path string. */
289 #define DT_FLAGS 30 /* Object specific flag values. */
290 #define DT_ENCODING 32 /* Values greater than or equal to DT_ENCODING
291 and less than DT_LOOS follow the rules for
292 the interpretation of the d_un union
293 as follows: even == 'd_ptr', even == 'd_val'
294 or none */
295 #define DT_PREINIT_ARRAY 32 /* Address of the array of pointers to
296 pre-initialization functions. */
297 #define DT_PREINIT_ARRAYSZ 33 /* Size in bytes of the array of
298 pre-initialization functions. */
299 #define DT_LOOS 0x6000000d /* First OS-specific */
300 #define DT_HIOS 0x6ffff000 /* Last OS-specific */
301 #define DT_LOPROC 0x70000000 /* First processor-specific type. */
302 #define DT_HIPROC 0x7fffffff /* Last processor-specific type. */
303
304 /* Values for DT_FLAGS */
305 #define DF_ORIGIN 0x0001 /* Indicates that the object being loaded may
306 make reference to the $ORIGIN substitution
307 string */
308 #define DF_SYMBOLIC 0x0002 /* Indicates "symbolic" linking. */
309 #define DF_TEXTREL 0x0004 /* Indicates there may be relocations in
310 non-writable segments. */
311 #define DF_BIND_NOW 0x0008 /* Indicates that the dynamic linker should
312 process all relocations for the object
313 containing this entry before transferring
314 control to the program. */
315 #define DF_STATIC_TLS 0x0010 /* Indicates that the shared object or
316 executable contains code using a static
317 thread-local storage scheme. */
318
319 /* Values for n_type. Used in core files. */
320 #define NT_PRSTATUS 1 /* Process status. */
321 #define NT_FPREGSET 2 /* Floating point registers. */
322 #define NT_PRPSINFO 3 /* Process state info. */
323
324 /* Symbol Binding - ELFNN_ST_BIND - st_info */
325 #define STB_LOCAL 0 /* Local symbol */
326 #define STB_GLOBAL 1 /* Global symbol */
327 #define STB_WEAK 2 /* like global - lower precedence */
328 #define STB_LOOS 10 /* Reserved range for operating system */
329 #define STB_HIOS 12 /* specific semantics. */
330 #define STB_LOPROC 13 /* reserved range for processor */
331 #define STB_HIPROC 15 /* specific semantics. */
332
333 /* Symbol type - ELFNN_ST_TYPE - st_info */
334 #define STT_NOTYPE 0 /* Unspecified type. */
335 #define STT_OBJECT 1 /* Data object. */
336 #define STT_FUNC 2 /* Function. */
337 #define STT_SECTION 3 /* Section. */
338 #define STT_FILE 4 /* Source file. */
339 #define STT_COMMON 5 /* Uninitialized common block. */
340 #define STT_TLS 6 /* TLS object. */
341 #define STT_LOOS 10 /* Reserved range for operating system */
342 #define STT_HIOS 12 /* specific semantics. */
343 #define STT_LOPROC 13 /* reserved range for processor */
344 #define STT_HIPROC 15 /* specific semantics. */
345
346 /* Symbol visibility - ELFNN_ST_VISIBILITY - st_other */
347 #define STV_DEFAULT 0x0 /* Default visibility (see binding). */
348 #define STV_INTERNAL 0x1 /* Special meaning in relocatable objects. */
349 #define STV_HIDDEN 0x2 /* Not visible. */
350 #define STV_PROTECTED 0x3 /* Visible but not preemptible. */
351
352 /* Special symbol table indexes. */
353 #define STN_UNDEF 0 /* Undefined symbol index. */
354
355 #endif /* !_SYS_ELF_COMMON_H_ */
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