1 /* ELF support for BFD.
2 Copyright (C) 1991,92,93,94,95,96,97,98 Free Software Foundation, Inc.
4 Written by Fred Fish @ Cygnus Support, from information published
5 in "UNIX System V Release 4, Programmers Guide: ANSI C and
6 Programming Support Tools".
8 This file is part of BFD, the Binary File Descriptor library.
10 This program is free software; you can redistribute it and/or modify
11 it under the terms of the GNU General Public License as published by
12 the Free Software Foundation; either version 2 of the License, or
13 (at your option) any later version.
15 This program is distributed in the hope that it will be useful,
16 but WITHOUT ANY WARRANTY; without even the implied warranty of
17 MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
18 GNU General Public License for more details.
20 You should have received a copy of the GNU General Public License
21 along with this program; if not, write to the Free Software
22 Foundation, Inc., 59 Temple Place - Suite 330, Boston, MA 02111-1307, USA. */
25 /* This file is part of ELF support for BFD, and contains the portions
26 that are common to both the internal and external representations.
27 For example, ELFMAG0 is the byte 0x7F in both the internal (in-memory)
28 and external (in-file) representations. */
33 /* Fields in e_ident[] */
35 #define EI_MAG0 0 /* File identification byte 0 index */
36 #define ELFMAG0 0x7F /* Magic number byte 0 */
38 #define EI_MAG1 1 /* File identification byte 1 index */
39 #define ELFMAG1 'E' /* Magic number byte 1 */
41 #define EI_MAG2 2 /* File identification byte 2 index */
42 #define ELFMAG2 'L' /* Magic number byte 2 */
44 #define EI_MAG3 3 /* File identification byte 3 index */
45 #define ELFMAG3 'F' /* Magic number byte 3 */
47 #define EI_CLASS 4 /* File class */
48 #define ELFCLASSNONE 0 /* Invalid class */
49 #define ELFCLASS32 1 /* 32-bit objects */
50 #define ELFCLASS64 2 /* 64-bit objects */
52 #define EI_DATA 5 /* Data encoding */
53 #define ELFDATANONE 0 /* Invalid data encoding */
54 #define ELFDATA2LSB 1 /* 2's complement, little endian */
55 #define ELFDATA2MSB 2 /* 2's complement, big endian */
57 #define EI_VERSION 6 /* File version */
59 #define EI_PAD 7 /* Start of padding bytes */
62 /* Values for e_type, which identifies the object file type */
64 #define ET_NONE 0 /* No file type */
65 #define ET_REL 1 /* Relocatable file */
66 #define ET_EXEC 2 /* Executable file */
67 #define ET_DYN 3 /* Shared object file */
68 #define ET_CORE 4 /* Core file */
69 #define ET_LOPROC 0xFF00 /* Processor-specific */
70 #define ET_HIPROC 0xFFFF /* Processor-specific */
72 /* Values for e_machine, which identifies the architecture */
74 #define EM_NONE 0 /* No machine */
75 #define EM_M32 1 /* AT&T WE 32100 */
76 #define EM_SPARC 2 /* SUN SPARC */
77 #define EM_386 3 /* Intel 80386 */
78 #define EM_68K 4 /* Motorola m68k family */
79 #define EM_88K 5 /* Motorola m88k family */
80 #define EM_486 6 /* Intel 80486 */
81 #define EM_860 7 /* Intel 80860 */
82 #define EM_MIPS 8 /* MIPS R3000 (officially, big-endian only) */
83 #define EM_S370 9 /* Amdahl */
84 #define EM_MIPS_RS4_BE 10 /* MIPS R4000 big-endian */
86 #define EM_PARISC 15 /* HPPA */
88 #define EM_SPARC32PLUS 18 /* Sun's "v8plus" */
89 #define EM_960 19 /* Intel 80960 */
90 #define EM_PPC 20 /* PowerPC */
92 #define EM_V800 36 /* NEC V800 series */
93 #define EM_FR20 37 /* Fujitsu FR20 */
94 #define EM_RH32 38 /* TRW RH32 */
95 #define EM_MMA 39 /* Fujitsu MMA */
96 #define EM_ARM 40 /* ARM */
97 #define EM_OLD_ALPHA 41 /* Digital Alpha */
98 #define EM_SH 42 /* Hitachi SH */
99 #define EM_SPARCV9 43 /* SPARC v9 64-bit */
101 /* If it is necessary to assign new unofficial EM_* values, please pick large
102 random numbers (0x8523, 0xa7f2, etc.) to minimize the chances of collision
103 with official or non-GNU unofficial values.
105 NOTE: Do not just increment the most recent number by one.
106 Somebody else somewhere will do exactly the same thing, and you
107 will have a collision. Instead, pick a random number. */
109 /* Cygnus PowerPC ELF backend. Written in the absence of an ABI. */
110 #define EM_CYGNUS_POWERPC 0x9025
112 /* Old version of Sparc v9, from before the ABI; this should be
114 #define EM_OLD_SPARCV9 11
116 /* Old version of PowerPC, this should be removed shortly. */
117 #define EM_PPC_OLD 17
119 /* Cygnus ARC ELF backend. Written in the absence of an ABI. */
120 #define EM_CYGNUS_ARC 0x9040
122 /* Cygnus M32R ELF backend. Written in the absence of an ABI. */
123 #define EM_CYGNUS_M32R 0x9041
125 /* Alpha backend magic number. Written in the absence of an ABI. */
126 #define EM_ALPHA 0x9026
128 /* D10V backend magic number. Written in the absence of an ABI. */
129 #define EM_CYGNUS_D10V 0x7650
131 /* D30V backend magic number. Written in the absence of an ABI. */
132 #define EM_CYGNUS_D30V 0x7676
134 /* V850 backend magic number. Written in the absense of an ABI. */
135 #define EM_CYGNUS_V850 0x9080
137 /* mn10200 and mn10300 backend magic numbers.
138 Written in the absense of an ABI. */
139 #define EM_CYGNUS_MN10200 0xdead
140 #define EM_CYGNUS_MN10300 0xbeef
142 /* See the above comment before you add a new EM_* value here. */
144 /* Values for e_version */
146 #define EV_NONE 0 /* Invalid ELF version */
147 #define EV_CURRENT 1 /* Current version */
149 /* Values for program header, p_type field */
151 #define PT_NULL 0 /* Program header table entry unused */
152 #define PT_LOAD 1 /* Loadable program segment */
153 #define PT_DYNAMIC 2 /* Dynamic linking information */
154 #define PT_INTERP 3 /* Program interpreter */
155 #define PT_NOTE 4 /* Auxiliary information */
156 #define PT_SHLIB 5 /* Reserved, unspecified semantics */
157 #define PT_PHDR 6 /* Entry for header table itself */
158 #define PT_LOPROC 0x70000000 /* Processor-specific */
159 #define PT_HIPROC 0x7FFFFFFF /* Processor-specific */
161 /* Program segment permissions, in program header p_flags field */
163 #define PF_X (1 << 0) /* Segment is executable */
164 #define PF_W (1 << 1) /* Segment is writable */
165 #define PF_R (1 << 2) /* Segment is readable */
166 #define PF_MASKPROC 0xF0000000 /* Processor-specific reserved bits */
168 /* Values for section header, sh_type field */
170 #define SHT_NULL 0 /* Section header table entry unused */
171 #define SHT_PROGBITS 1 /* Program specific (private) data */
172 #define SHT_SYMTAB 2 /* Link editing symbol table */
173 #define SHT_STRTAB 3 /* A string table */
174 #define SHT_RELA 4 /* Relocation entries with addends */
175 #define SHT_HASH 5 /* A symbol hash table */
176 #define SHT_DYNAMIC 6 /* Information for dynamic linking */
177 #define SHT_NOTE 7 /* Information that marks file */
178 #define SHT_NOBITS 8 /* Section occupies no space in file */
179 #define SHT_REL 9 /* Relocation entries, no addends */
180 #define SHT_SHLIB 10 /* Reserved, unspecified semantics */
181 #define SHT_DYNSYM 11 /* Dynamic linking symbol table */
183 /* The next three section types are defined by Solaris, and are named
184 SHT_SUNW*. We use them in GNU code, so we also define SHT_GNU*
186 #define SHT_SUNW_verdef 0x6ffffffd /* Versions defined by file */
187 #define SHT_SUNW_verneed 0x6ffffffe /* Versions needed by file */
188 #define SHT_SUNW_versym 0x6fffffff /* Symbol versions */
190 #define SHT_GNU_verdef SHT_SUNW_verdef
191 #define SHT_GNU_verneed SHT_SUNW_verneed
192 #define SHT_GNU_versym SHT_SUNW_versym
194 #define SHT_LOPROC 0x70000000 /* Processor-specific semantics, lo */
195 #define SHT_HIPROC 0x7FFFFFFF /* Processor-specific semantics, hi */
196 #define SHT_LOUSER 0x80000000 /* Application-specific semantics */
197 #define SHT_HIUSER 0x8FFFFFFF /* Application-specific semantics */
199 /* Values for section header, sh_flags field */
201 #define SHF_WRITE (1 << 0) /* Writable data during execution */
202 #define SHF_ALLOC (1 << 1) /* Occupies memory during execution */
203 #define SHF_EXECINSTR (1 << 2) /* Executable machine instructions */
204 #define SHF_MASKPROC 0xF0000000 /* Processor-specific semantics */
206 /* Values of note segment descriptor types for core files. */
208 #define NT_PRSTATUS 1 /* Contains copy of prstatus struct */
209 #define NT_FPREGSET 2 /* Contains copy of fpregset struct */
210 #define NT_PRPSINFO 3 /* Contains copy of prpsinfo struct */
212 /* Note segments for core files on dir-style procfs systems. */
214 #define NT_PSTATUS 10 /* Has a struct pstatus */
215 #define NT_FPREGS 12 /* Has a struct fpregset */
216 #define NT_PSINFO 13 /* Has a struct psinfo */
217 #define NT_LWPSTATUS 16 /* Has a struct lwpstatus_t
218 #define NT_LWPSINFO 17 /* Has a struct lwpsinfo_t */
220 /* Values of note segment descriptor types for object files. */
221 /* (Only for hppa right now. Should this be moved elsewhere?) */
223 #define NT_VERSION 1 /* Contains a version string. */
225 /* These three macros disassemble and assemble a symbol table st_info field,
226 which contains the symbol binding and symbol type. The STB_ and STT_
227 defines identify the binding and type. */
229 #define ELF_ST_BIND(val) (((unsigned int)(val)) >> 4)
230 #define ELF_ST_TYPE(val) ((val) & 0xF)
231 #define ELF_ST_INFO(bind,type) (((bind) << 4) + ((type) & 0xF))
233 #define STN_UNDEF 0 /* undefined symbol index */
235 #define STB_LOCAL 0 /* Symbol not visible outside obj */
236 #define STB_GLOBAL 1 /* Symbol visible outside obj */
237 #define STB_WEAK 2 /* Like globals, lower precedence */
238 #define STB_LOPROC 13 /* Application-specific semantics */
239 #define STB_HIPROC 15 /* Application-specific semantics */
241 #define STT_NOTYPE 0 /* Symbol type is unspecified */
242 #define STT_OBJECT 1 /* Symbol is a data object */
243 #define STT_FUNC 2 /* Symbol is a code object */
244 #define STT_SECTION 3 /* Symbol associated with a section */
245 #define STT_FILE 4 /* Symbol gives a file name */
246 #define STT_LOPROC 13 /* Application-specific semantics */
247 #define STT_HIPROC 15 /* Application-specific semantics */
249 /* Special section indices, which may show up in st_shndx fields, among
252 #define SHN_UNDEF 0 /* Undefined section reference */
253 #define SHN_LORESERVE 0xFF00 /* Begin range of reserved indices */
254 #define SHN_LOPROC 0xFF00 /* Begin range of appl-specific */
255 #define SHN_HIPROC 0xFF1F /* End range of appl-specific */
256 #define SHN_ABS 0xFFF1 /* Associated symbol is absolute */
257 #define SHN_COMMON 0xFFF2 /* Associated symbol is in common */
258 #define SHN_HIRESERVE 0xFFFF /* End range of reserved indices */
260 /* relocation info handling macros */
262 #define ELF32_R_SYM(i) ((i) >> 8)
263 #define ELF32_R_TYPE(i) ((i) & 0xff)
264 #define ELF32_R_INFO(s,t) (((s) << 8) + ((t) & 0xff))
266 #define ELF64_R_SYM(i) ((i) >> 32)
267 #define ELF64_R_TYPE(i) ((i) & 0xffffffff)
268 #define ELF64_R_INFO(s,t) (((bfd_vma) (s) << 32) + (bfd_vma) (t))
270 /* Dynamic section tags */
274 #define DT_PLTRELSZ 2
288 #define DT_SYMBOLIC 16
294 #define DT_TEXTREL 22
297 /* The next four dynamic tags are used on Solaris. We support them
299 #define DT_VALRNGLO 0x6ffffd00
300 #define DT_POSFLAG_1 0x6ffffdfd
301 #define DT_SYMINSZ 0x6ffffdfe
302 #define DT_SYMINENT 0x6ffffdff
303 #define DT_VALRNGHI 0x6ffffdff
305 #define DT_ADDRRNGLO 0x6ffffe00
306 #define DT_SYMINFO 0x6ffffeff
307 #define DT_ADDRRNGHI 0x6ffffeff
309 #define DT_RELACOUNT 0x6ffffff9
310 #define DT_RELCOUNT 0x6ffffffa
311 #define DT_FLAGS_1 0x6ffffffb
312 #define DT_VERDEF 0x6ffffffc
313 #define DT_VERDEFNUM 0x6ffffffd
314 #define DT_VERNEED 0x6ffffffe
315 #define DT_VERNEEDNUM 0x6fffffff
317 /* This tag is a GNU extension to the Solaris version scheme. */
318 #define DT_VERSYM 0x6ffffff0
320 #define DT_LOPROC 0x70000000
321 #define DT_HIPROC 0x7fffffff
323 /* These section tags are used on Solaris. We support them
324 everywhere, and hope they do not conflict. */
326 #define DT_AUXILIARY 0x7ffffffd
327 #define DT_USED 0x7ffffffe
328 #define DT_FILTER 0x7fffffff
330 /* Flag values used in the DT_POSFLAG_1 .dynamic entry. */
331 #define DF_P1_LAZYLOAD 0x00000001
332 #define DF_P1_GROUPPERM 0x00000002
334 /* Flag value in in the DT_1_FLAGS .dynamic entry. */
335 #define DF_1_NOW 0x00000001
336 #define DF_1_GLOBAL 0x00000002
337 #define DF_1_GROUP 0x00000004
338 #define DF_1_NODELETE 0x00000008
339 #define DF_1_LOADFLTR 0x00000010
340 #define DF_1_INITFIRST 0x00000020
341 #define DF_1_NOOPEN 0x00000040
342 #define DF_1_ORIGIN 0x00000080
343 #define DF_1_DIRECT 0x00000100
344 #define DF_1_TRANS 0x00000200
345 #define DF_1_INTERPOSE 0x00000400
347 /* These constants are used for the version number of a Elf32_Verdef
350 #define VER_DEF_NONE 0
351 #define VER_DEF_CURRENT 1
353 /* These constants appear in the vd_flags field of a Elf32_Verdef
356 #define VER_FLG_BASE 0x1
357 #define VER_FLG_WEAK 0x2
359 /* These special constants can be found in an Elf32_Versym field. */
361 #define VER_NDX_LOCAL 0
362 #define VER_NDX_GLOBAL 1
364 /* These constants are used for the version number of a Elf32_Verneed
367 #define VER_NEED_NONE 0
368 #define VER_NEED_CURRENT 1
370 /* This flag appears in a Versym structure. It means that the symbol
371 is hidden, and is only visible with an explicit version number.
372 This is a GNU extension. */
374 #define VERSYM_HIDDEN 0x8000
376 /* This is the mask for the rest of the Versym information. */
378 #define VERSYM_VERSION 0x7fff
380 /* This is a special token which appears as part of a symbol name. It
381 indictes that the rest of the name is actually the name of a
382 version node, and is not part of the actual name. This is a GNU
383 extension. For example, the symbol name `stat@ver2' is taken to
384 mean the symbol `stat' in version `ver2'. */
386 #define ELF_VER_CHR '@'
388 /* Possible values for si_boundto. */
389 #define SYMINFO_BT_SELF 0xffff /* Symbol bound to self */
390 #define SYMINFO_BT_PARENT 0xfffe /* Symbol bound to parent */
391 #define SYMINFO_BT_LOWRESERVE 0xff00 /* Beginning of reserved entries */
393 /* Possible bitmasks for si_flags. */
394 #define SYMINFO_FLG_DIRECT 0x0001 /* Direct bound symbol */
395 #define SYMINFO_FLG_PASSTHRU 0x0002 /* Pass-thru symbol for translator */
396 #define SYMINFO_FLG_COPY 0x0004 /* Symbol is a copy-reloc */
397 #define SYMINFO_FLG_LAZYLOAD 0x0008 /* Symbol bound to object to be lazy
399 /* Syminfo version values. */
400 #define SYMINFO_NONE 0
401 #define SYMINFO_CURRENT 1
402 #define SYMINFO_NUM 2
404 #endif /* _ELF_COMMON_H */