1 //===-- llvm/Support/ELF.h - ELF constants and data structures --*- C++ -*-===//
3 // The LLVM Compiler Infrastructure
5 // This file is distributed under the University of Illinois Open Source
6 // License. See LICENSE.TXT for details.
8 //===----------------------------------------------------------------------===//
10 // This header contains common, non-processor-specific data structures and
11 // constants for the ELF file format.
13 // The details of the ELF32 bits in this file are largely based on the Tool
14 // Interface Standard (TIS) Executable and Linking Format (ELF) Specification
15 // Version 1.2, May 1995. The ELF64 stuff is based on ELF-64 Object File Format
16 // Version 1.5, Draft 2, May 1998 as well as OpenBSD header files.
18 //===----------------------------------------------------------------------===//
20 #ifndef LLVM_SUPPORT_ELF_H
21 #define LLVM_SUPPORT_ELF_H
23 #include "llvm/Support/DataTypes.h"
30 typedef uint32_t Elf32_Addr; // Program address
31 typedef uint16_t Elf32_Half;
32 typedef uint32_t Elf32_Off; // File offset
33 typedef int32_t Elf32_Sword;
34 typedef uint32_t Elf32_Word;
36 typedef uint64_t Elf64_Addr;
37 typedef uint64_t Elf64_Off;
38 typedef int32_t Elf64_Shalf;
39 typedef int32_t Elf64_Sword;
40 typedef uint32_t Elf64_Word;
41 typedef int64_t Elf64_Sxword;
42 typedef uint64_t Elf64_Xword;
43 typedef uint32_t Elf64_Half;
44 typedef uint16_t Elf64_Quarter;
46 // Object file magic string.
47 static const char ElfMagic[] = { 0x7f, 'E', 'L', 'F', '\0' };
49 // e_ident size and indices.
51 EI_MAG0 = 0, // File identification index.
52 EI_MAG1 = 1, // File identification index.
53 EI_MAG2 = 2, // File identification index.
54 EI_MAG3 = 3, // File identification index.
55 EI_CLASS = 4, // File class.
56 EI_DATA = 5, // Data encoding.
57 EI_VERSION = 6, // File version.
58 EI_OSABI = 7, // OS/ABI identification.
59 EI_ABIVERSION = 8, // ABI version.
60 EI_PAD = 9, // Start of padding bytes.
61 EI_NIDENT = 16 // Number of bytes in e_ident.
65 unsigned char e_ident[EI_NIDENT]; // ELF Identification bytes
66 Elf32_Half e_type; // Type of file (see ET_* below)
67 Elf32_Half e_machine; // Required architecture for this file (see EM_*)
68 Elf32_Word e_version; // Must be equal to 1
69 Elf32_Addr e_entry; // Address to jump to in order to start program
70 Elf32_Off e_phoff; // Program header table's file offset, in bytes
71 Elf32_Off e_shoff; // Section header table's file offset, in bytes
72 Elf32_Word e_flags; // Processor-specific flags
73 Elf32_Half e_ehsize; // Size of ELF header, in bytes
74 Elf32_Half e_phentsize; // Size of an entry in the program header table
75 Elf32_Half e_phnum; // Number of entries in the program header table
76 Elf32_Half e_shentsize; // Size of an entry in the section header table
77 Elf32_Half e_shnum; // Number of entries in the section header table
78 Elf32_Half e_shstrndx; // Sect hdr table index of sect name string table
79 bool checkMagic() const {
80 return (memcmp(e_ident, ElfMagic, strlen(ElfMagic))) == 0;
82 unsigned char getFileClass() const { return e_ident[EI_CLASS]; }
83 unsigned char getDataEncoding() const { return e_ident[EI_DATA]; }
86 // 64-bit ELF header. Fields are the same as for ELF32, but with different
89 unsigned char e_ident[EI_NIDENT];
91 Elf64_Quarter e_machine;
97 Elf64_Quarter e_ehsize;
98 Elf64_Quarter e_phentsize;
99 Elf64_Quarter e_phnum;
100 Elf64_Quarter e_shentsize;
101 Elf64_Quarter e_shnum;
102 Elf64_Quarter e_shstrndx;
103 bool checkMagic() const {
104 return (memcmp(e_ident, ElfMagic, strlen(ElfMagic))) == 0;
106 unsigned char getFileClass() const { return e_ident[EI_CLASS]; }
107 unsigned char getDataEncoding() const { return e_ident[EI_DATA]; }
112 ET_NONE = 0, // No file type
113 ET_REL = 1, // Relocatable file
114 ET_EXEC = 2, // Executable file
115 ET_DYN = 3, // Shared object file
116 ET_CORE = 4, // Core file
117 ET_LOPROC = 0xff00, // Beginning of processor-specific codes
118 ET_HIPROC = 0xffff // Processor-specific
127 // Machine architectures
129 EM_NONE = 0, // No machine
130 EM_M32 = 1, // AT&T WE 32100
131 EM_SPARC = 2, // SPARC
132 EM_386 = 3, // Intel 386
133 EM_68K = 4, // Motorola 68000
134 EM_88K = 5, // Motorola 88000
135 EM_486 = 6, // Intel 486 (deprecated)
136 EM_860 = 7, // Intel 80860
137 EM_MIPS = 8, // MIPS R3000
138 EM_PPC = 20, // PowerPC
139 EM_PPC64 = 21, // PowerPC64
141 EM_ALPHA = 41, // DEC Alpha
142 EM_SPARCV9 = 43, // SPARC V9
143 EM_X86_64 = 62, // AMD64
144 EM_MBLAZE = 47787 // Xilinx MicroBlaze
147 // Object file classes.
149 ELFCLASS32 = 1, // 32-bit object file
150 ELFCLASS64 = 2 // 64-bit object file
153 // Object file byte orderings.
155 ELFDATANONE = 0, // Invalid data encoding.
156 ELFDATA2LSB = 1, // Little-endian object file
157 ELFDATA2MSB = 2 // Big-endian object file
160 // OS ABI identification.
162 ELFOSABI_NONE = 0, // UNIX System V ABI
163 ELFOSABI_HPUX = 1, // HP-UX operating system
164 ELFOSABI_NETBSD = 2, // NetBSD
165 ELFOSABI_LINUX = 3, // GNU/Linux
166 ELFOSABI_HURD = 4, // GNU/Hurd
167 ELFOSABI_SOLARIS = 6, // Solaris
168 ELFOSABI_AIX = 7, // AIX
169 ELFOSABI_IRIX = 8, // IRIX
170 ELFOSABI_FREEBSD = 9, // FreeBSD
171 ELFOSABI_TRU64 = 10, // TRU64 UNIX
172 ELFOSABI_MODESTO = 11, // Novell Modesto
173 ELFOSABI_OPENBSD = 12, // OpenBSD
174 ELFOSABI_OPENVMS = 13, // OpenVMS
175 ELFOSABI_NSK = 14, // Hewlett-Packard Non-Stop Kernel
176 ELFOSABI_AROS = 15, // AROS
177 ELFOSABI_FENIXOS = 16, // FenixOS
178 ELFOSABI_C6000_ELFABI = 64, // Bare-metal TMS320C6000
179 ELFOSABI_C6000_LINUX = 65, // Linux TMS320C6000
180 ELFOSABI_ARM = 97, // ARM
181 ELFOSABI_STANDALONE = 255 // Standalone (embedded) application
184 // X86_64 relocations.
192 R_X86_64_GLOB_DAT = 6,
193 R_X86_64_JUMP_SLOT = 7,
194 R_X86_64_RELATIVE = 8,
195 R_X86_64_GOTPCREL = 9,
202 R_X86_64_DTPMOD64 = 16,
203 R_X86_64_DTPOFF64 = 17,
204 R_X86_64_TPOFF64 = 18,
207 R_X86_64_DTPOFF32 = 21,
208 R_X86_64_GOTTPOFF = 22,
209 R_X86_64_TPOFF32 = 23,
211 R_X86_64_GOTOFF64 = 25,
212 R_X86_64_GOTPC32 = 26,
213 R_X86_64_SIZE32 = 32,
214 R_X86_64_SIZE64 = 33,
215 R_X86_64_GOTPC32_TLSDESC = 34,
216 R_X86_64_TLSDESC_CALL = 35,
217 R_X86_64_TLSDESC = 36
221 // TODO: this is just a subset
235 R_386_TLS_TPOFF = 14,
237 R_386_TLS_GOTIE = 16,
245 R_386_TLS_GD_32 = 24,
246 R_386_TLS_GD_PUSH = 25,
247 R_386_TLS_GD_CALL = 26,
248 R_386_TLS_GD_POP = 27,
249 R_386_TLS_LDM_32 = 28,
250 R_386_TLS_LDM_PUSH = 29,
251 R_386_TLS_LDM_CALL = 30,
252 R_386_TLS_LDM_POP = 31,
253 R_386_TLS_LDO_32 = 32,
254 R_386_TLS_IE_32 = 33,
255 R_386_TLS_LE_32 = 34,
256 R_386_TLS_DTPMOD32 = 35,
257 R_386_TLS_DTPOFF32 = 36,
258 R_386_TLS_TPOFF32 = 37,
259 R_386_TLS_GOTDESC = 39,
260 R_386_TLS_DESC_CALL = 40,
262 R_386_IRELATIVE = 42,
266 // MBlaze relocations.
268 R_MICROBLAZE_NONE = 0,
270 R_MICROBLAZE_32_PCREL = 2,
271 R_MICROBLAZE_64_PCREL = 3,
272 R_MICROBLAZE_32_PCREL_LO = 4,
274 R_MICROBLAZE_32_LO = 6,
275 R_MICROBLAZE_SRO32 = 7,
276 R_MICROBLAZE_SRW32 = 8,
277 R_MICROBLAZE_64_NONE = 9,
278 R_MICROBLAZE_32_SYM_OP_SYM = 10,
279 R_MICROBLAZE_GNU_VTINHERIT = 11,
280 R_MICROBLAZE_GNU_VTENTRY = 12,
281 R_MICROBLAZE_GOTPC_64 = 13,
282 R_MICROBLAZE_GOT_64 = 14,
283 R_MICROBLAZE_PLT_64 = 15,
284 R_MICROBLAZE_REL = 16,
285 R_MICROBLAZE_JUMP_SLOT = 17,
286 R_MICROBLAZE_GLOB_DAT = 18,
287 R_MICROBLAZE_GOTOFF_64 = 19,
288 R_MICROBLAZE_GOTOFF_32 = 20,
289 R_MICROBLAZE_COPY = 21
292 // ELF Relocation types for ARM
293 // Meets 2.08 ABI Specs.
300 R_ARM_LDR_PC_G0 = 0x04,
303 R_ARM_THM_ABS5 = 0x07,
305 R_ARM_SBREL32 = 0x09,
306 R_ARM_THM_CALL = 0x0a,
307 R_ARM_THM_PC8 = 0x0b,
308 R_ARM_BREL_ADJ = 0x0c,
309 R_ARM_TLS_DESC = 0x0d,
310 R_ARM_THM_SWI8 = 0x0e,
312 R_ARM_THM_XPC22 = 0x10,
313 R_ARM_TLS_DTPMOD32 = 0x11,
314 R_ARM_TLS_DTPOFF32 = 0x12,
315 R_ARM_TLS_TPOFF32 = 0x13,
317 R_ARM_GLOB_DAT = 0x15,
318 R_ARM_JUMP_SLOT = 0x16,
319 R_ARM_RELATIVE = 0x17,
320 R_ARM_GOTOFF32 = 0x18,
321 R_ARM_BASE_PREL = 0x19,
322 R_ARM_GOT_BREL = 0x1a,
326 R_ARM_THM_JUMP24 = 0x1e,
327 R_ARM_BASE_ABS = 0x1f,
328 R_ARM_ALU_PCREL_7_0 = 0x20,
329 R_ARM_ALU_PCREL_15_8 = 0x21,
330 R_ARM_ALU_PCREL_23_15 = 0x22,
331 R_ARM_LDR_SBREL_11_0_NC = 0x23,
332 R_ARM_ALU_SBREL_19_12_NC = 0x24,
333 R_ARM_ALU_SBREL_27_20_CK = 0x25,
334 R_ARM_TARGET1 = 0x26,
335 R_ARM_SBREL31 = 0x27,
337 R_ARM_TARGET2 = 0x29,
339 R_ARM_MOVW_ABS_NC = 0x2b,
340 R_ARM_MOVT_ABS = 0x2c,
341 R_ARM_MOVW_PREL_NC = 0x2d,
342 R_ARM_MOVT_PREL = 0x2e,
343 R_ARM_THM_MOVW_ABS_NC = 0x2f,
344 R_ARM_THM_MOVT_ABS = 0x30,
345 R_ARM_THM_MOVW_PREL_NC = 0x31,
346 R_ARM_THM_MOVT_PREL = 0x32,
347 R_ARM_THM_JUMP19 = 0x33,
348 R_ARM_THM_JUMP6 = 0x34,
349 R_ARM_THM_ALU_PREL_11_0 = 0x35,
350 R_ARM_THM_PC12 = 0x36,
351 R_ARM_ABS32_NOI = 0x37,
352 R_ARM_REL32_NOI = 0x38,
353 R_ARM_ALU_PC_G0_NC = 0x39,
354 R_ARM_ALU_PC_G0 = 0x3a,
355 R_ARM_ALU_PC_G1_NC = 0x3b,
356 R_ARM_ALU_PC_G1 = 0x3c,
357 R_ARM_ALU_PC_G2 = 0x3d,
358 R_ARM_LDR_PC_G1 = 0x3e,
359 R_ARM_LDR_PC_G2 = 0x3f,
360 R_ARM_LDRS_PC_G0 = 0x40,
361 R_ARM_LDRS_PC_G1 = 0x41,
362 R_ARM_LDRS_PC_G2 = 0x42,
363 R_ARM_LDC_PC_G0 = 0x43,
364 R_ARM_LDC_PC_G1 = 0x44,
365 R_ARM_LDC_PC_G2 = 0x45,
366 R_ARM_ALU_SB_G0_NC = 0x46,
367 R_ARM_ALU_SB_G0 = 0x47,
368 R_ARM_ALU_SB_G1_NC = 0x48,
369 R_ARM_ALU_SB_G1 = 0x49,
370 R_ARM_ALU_SB_G2 = 0x4a,
371 R_ARM_LDR_SB_G0 = 0x4b,
372 R_ARM_LDR_SB_G1 = 0x4c,
373 R_ARM_LDR_SB_G2 = 0x4d,
374 R_ARM_LDRS_SB_G0 = 0x4e,
375 R_ARM_LDRS_SB_G1 = 0x4f,
376 R_ARM_LDRS_SB_G2 = 0x50,
377 R_ARM_LDC_SB_G0 = 0x51,
378 R_ARM_LDC_SB_G1 = 0x52,
379 R_ARM_LDC_SB_G2 = 0x53,
380 R_ARM_MOVW_BREL_NC = 0x54,
381 R_ARM_MOVT_BREL = 0x55,
382 R_ARM_MOVW_BREL = 0x56,
383 R_ARM_THM_MOVW_BREL_NC = 0x57,
384 R_ARM_THM_MOVT_BREL = 0x58,
385 R_ARM_THM_MOVW_BREL = 0x59,
386 R_ARM_TLS_GOTDESC = 0x5a,
387 R_ARM_TLS_CALL = 0x5b,
388 R_ARM_TLS_DESCSEQ = 0x5c,
389 R_ARM_THM_TLS_CALL = 0x5d,
390 R_ARM_PLT32_ABS = 0x5e,
391 R_ARM_GOT_ABS = 0x5f,
392 R_ARM_GOT_PREL = 0x60,
393 R_ARM_GOT_BREL12 = 0x61,
394 R_ARM_GOTOFF12 = 0x62,
395 R_ARM_GOTRELAX = 0x63,
396 R_ARM_GNU_VTENTRY = 0x64,
397 R_ARM_GNU_VTINHERIT = 0x65,
398 R_ARM_THM_JUMP11 = 0x66,
399 R_ARM_THM_JUMP8 = 0x67,
400 R_ARM_TLS_GD32 = 0x68,
401 R_ARM_TLS_LDM32 = 0x69,
402 R_ARM_TLS_LDO32 = 0x6a,
403 R_ARM_TLS_IE32 = 0x6b,
404 R_ARM_TLS_LE32 = 0x6c,
405 R_ARM_TLS_LDO12 = 0x6d,
406 R_ARM_TLS_LE12 = 0x6e,
407 R_ARM_TLS_IE12GP = 0x6f,
408 R_ARM_PRIVATE_0 = 0x70,
409 R_ARM_PRIVATE_1 = 0x71,
410 R_ARM_PRIVATE_2 = 0x72,
411 R_ARM_PRIVATE_3 = 0x73,
412 R_ARM_PRIVATE_4 = 0x74,
413 R_ARM_PRIVATE_5 = 0x75,
414 R_ARM_PRIVATE_6 = 0x76,
415 R_ARM_PRIVATE_7 = 0x77,
416 R_ARM_PRIVATE_8 = 0x78,
417 R_ARM_PRIVATE_9 = 0x79,
418 R_ARM_PRIVATE_10 = 0x7a,
419 R_ARM_PRIVATE_11 = 0x7b,
420 R_ARM_PRIVATE_12 = 0x7c,
421 R_ARM_PRIVATE_13 = 0x7d,
422 R_ARM_PRIVATE_14 = 0x7e,
423 R_ARM_PRIVATE_15 = 0x7f,
425 R_ARM_THM_TLS_DESCSEQ16 = 0x81,
426 R_ARM_THM_TLS_DESCSEQ32 = 0x82
433 Elf32_Word sh_name; // Section name (index into string table)
434 Elf32_Word sh_type; // Section type (SHT_*)
435 Elf32_Word sh_flags; // Section flags (SHF_*)
436 Elf32_Addr sh_addr; // Address where section is to be loaded
437 Elf32_Off sh_offset; // File offset of section data, in bytes
438 Elf32_Word sh_size; // Size of section, in bytes
439 Elf32_Word sh_link; // Section type-specific header table index link
440 Elf32_Word sh_info; // Section type-specific extra information
441 Elf32_Word sh_addralign; // Section address alignment
442 Elf32_Word sh_entsize; // Size of records contained within the section
445 // Section header for ELF64 - same fields as ELF32, different types.
449 Elf64_Xword sh_flags;
455 Elf64_Xword sh_addralign;
456 Elf64_Xword sh_entsize;
459 // Special section indices.
461 SHN_UNDEF = 0, // Undefined, missing, irrelevant, or meaningless
462 SHN_LORESERVE = 0xff00, // Lowest reserved index
463 SHN_LOPROC = 0xff00, // Lowest processor-specific index
464 SHN_HIPROC = 0xff1f, // Highest processor-specific index
465 SHN_ABS = 0xfff1, // Symbol has absolute value; does not need relocation
466 SHN_COMMON = 0xfff2, // FORTRAN COMMON or C external global variables
467 SHN_XINDEX = 0xffff, // Mark that the index is >= SHN_LORESERVE
468 SHN_HIRESERVE = 0xffff // Highest reserved index
473 SHT_NULL = 0, // No associated section (inactive entry).
474 SHT_PROGBITS = 1, // Program-defined contents.
475 SHT_SYMTAB = 2, // Symbol table.
476 SHT_STRTAB = 3, // String table.
477 SHT_RELA = 4, // Relocation entries; explicit addends.
478 SHT_HASH = 5, // Symbol hash table.
479 SHT_DYNAMIC = 6, // Information for dynamic linking.
480 SHT_NOTE = 7, // Information about the file.
481 SHT_NOBITS = 8, // Data occupies no space in the file.
482 SHT_REL = 9, // Relocation entries; no explicit addends.
483 SHT_SHLIB = 10, // Reserved.
484 SHT_DYNSYM = 11, // Symbol table.
485 SHT_INIT_ARRAY = 14, // Pointers to initialisation functions.
486 SHT_FINI_ARRAY = 15, // Pointers to termination functions.
487 SHT_PREINIT_ARRAY = 16, // Pointers to pre-init functions.
488 SHT_GROUP = 17, // Section group.
489 SHT_SYMTAB_SHNDX = 18, // Indicies for SHN_XINDEX entries.
490 SHT_LOOS = 0x60000000, // Lowest operating system-specific type.
491 SHT_HIOS = 0x6fffffff, // Highest operating system-specific type.
492 SHT_LOPROC = 0x70000000, // Lowest processor architecture-specific type.
493 // Fixme: All this is duplicated in MCSectionELF. Why??
494 // Exception Index table
495 SHT_ARM_EXIDX = 0x70000001U,
496 // BPABI DLL dynamic linking pre-emption map
497 SHT_ARM_PREEMPTMAP = 0x70000002U,
498 // Object file compatibility attributes
499 SHT_ARM_ATTRIBUTES = 0x70000003U,
500 SHT_ARM_DEBUGOVERLAY = 0x70000004U,
501 SHT_ARM_OVERLAYSECTION = 0x70000005U,
503 SHT_HIPROC = 0x7fffffff, // Highest processor architecture-specific type.
504 SHT_LOUSER = 0x80000000, // Lowest type reserved for applications.
505 SHT_HIUSER = 0xffffffff // Highest type reserved for applications.
510 SHF_WRITE = 0x1, // Section data should be writable during execution.
511 SHF_ALLOC = 0x2, // Section occupies memory during program execution.
512 SHF_EXECINSTR = 0x4, // Section contains executable machine instructions.
513 SHF_MASKPROC = 0xf0000000 // Bits indicating processor-specific flags.
516 // Section Group Flags
519 GRP_MASKOS = 0x0ff00000,
520 GRP_MASKPROC = 0xf0000000
523 // Symbol table entries for ELF32.
525 Elf32_Word st_name; // Symbol name (index into string table)
526 Elf32_Addr st_value; // Value or address associated with the symbol
527 Elf32_Word st_size; // Size of the symbol
528 unsigned char st_info; // Symbol's type and binding attributes
529 unsigned char st_other; // Must be zero; reserved
530 Elf32_Half st_shndx; // Which section (header table index) it's defined in
532 // These accessors and mutators correspond to the ELF32_ST_BIND,
533 // ELF32_ST_TYPE, and ELF32_ST_INFO macros defined in the ELF specification:
534 unsigned char getBinding() const { return st_info >> 4; }
535 unsigned char getType() const { return st_info & 0x0f; }
536 void setBinding(unsigned char b) { setBindingAndType(b, getType()); }
537 void setType(unsigned char t) { setBindingAndType(getBinding(), t); }
538 void setBindingAndType(unsigned char b, unsigned char t) {
539 st_info = (b << 4) + (t & 0x0f);
543 // Symbol table entries for ELF64.
545 Elf64_Word st_name; // Symbol name (index into string table)
546 unsigned char st_info; // Symbol's type and binding attributes
547 unsigned char st_other; // Must be zero; reserved
548 Elf64_Half st_shndx; // Which section (header table index) it's defined in
549 Elf64_Addr st_value; // Value or address associated with the symbol
550 Elf64_Xword st_size; // Size of the symbol
552 // These accessors and mutators are identical to those defined for ELF32
553 // symbol table entries.
554 unsigned char getBinding() const { return st_info >> 4; }
555 unsigned char getType() const { return st_info & 0x0f; }
556 void setBinding(unsigned char b) { setBindingAndType(b, getType()); }
557 void setType(unsigned char t) { setBindingAndType(getBinding(), t); }
558 void setBindingAndType(unsigned char b, unsigned char t) {
559 st_info = (b << 4) + (t & 0x0f);
563 // The size (in bytes) of symbol table entries.
565 SYMENTRY_SIZE32 = 16, // 32-bit symbol entry size
566 SYMENTRY_SIZE64 = 24 // 64-bit symbol entry size.
571 STB_LOCAL = 0, // Local symbol, not visible outside obj file containing def
572 STB_GLOBAL = 1, // Global symbol, visible to all object files being combined
573 STB_WEAK = 2, // Weak symbol, like global but lower-precedence
574 STB_LOPROC = 13, // Lowest processor-specific binding type
575 STB_HIPROC = 15 // Highest processor-specific binding type
580 STT_NOTYPE = 0, // Symbol's type is not specified
581 STT_OBJECT = 1, // Symbol is a data object (variable, array, etc.)
582 STT_FUNC = 2, // Symbol is executable code (function, etc.)
583 STT_SECTION = 3, // Symbol refers to a section
584 STT_FILE = 4, // Local, absolute symbol that refers to a file
585 STT_COMMON = 5, // An uninitialised common block
586 STT_TLS = 6, // Thread local data object
587 STT_LOPROC = 13, // Lowest processor-specific symbol type
588 STT_HIPROC = 15 // Highest processor-specific symbol type
592 STV_DEFAULT = 0, // Visibility is specified by binding type
593 STV_INTERNAL = 1, // Defined by processor supplements
594 STV_HIDDEN = 2, // Not visible to other components
595 STV_PROTECTED = 3 // Visible in other components but not preemptable
598 // Relocation entry, without explicit addend.
600 Elf32_Addr r_offset; // Location (file byte offset, or program virtual addr)
601 Elf32_Word r_info; // Symbol table index and type of relocation to apply
603 // These accessors and mutators correspond to the ELF32_R_SYM, ELF32_R_TYPE,
604 // and ELF32_R_INFO macros defined in the ELF specification:
605 Elf32_Word getSymbol() const { return (r_info >> 8); }
606 unsigned char getType() const { return (unsigned char) (r_info & 0x0ff); }
607 void setSymbol(Elf32_Word s) { setSymbolAndType(s, getType()); }
608 void setType(unsigned char t) { setSymbolAndType(getSymbol(), t); }
609 void setSymbolAndType(Elf32_Word s, unsigned char t) {
610 r_info = (s << 8) + t;
614 // Relocation entry with explicit addend.
616 Elf32_Addr r_offset; // Location (file byte offset, or program virtual addr)
617 Elf32_Word r_info; // Symbol table index and type of relocation to apply
618 Elf32_Sword r_addend; // Compute value for relocatable field by adding this
620 // These accessors and mutators correspond to the ELF32_R_SYM, ELF32_R_TYPE,
621 // and ELF32_R_INFO macros defined in the ELF specification:
622 Elf32_Word getSymbol() const { return (r_info >> 8); }
623 unsigned char getType() const { return (unsigned char) (r_info & 0x0ff); }
624 void setSymbol(Elf32_Word s) { setSymbolAndType(s, getType()); }
625 void setType(unsigned char t) { setSymbolAndType(getSymbol(), t); }
626 void setSymbolAndType(Elf32_Word s, unsigned char t) {
627 r_info = (s << 8) + t;
631 // Relocation entry, without explicit addend.
633 Elf64_Addr r_offset; // Location (file byte offset, or program virtual addr).
634 Elf64_Xword r_info; // Symbol table index and type of relocation to apply.
636 // These accessors and mutators correspond to the ELF64_R_SYM, ELF64_R_TYPE,
637 // and ELF64_R_INFO macros defined in the ELF specification:
638 Elf64_Xword getSymbol() const { return (r_info >> 32); }
639 unsigned char getType() const {
640 return (unsigned char) (r_info & 0xffffffffL);
642 void setSymbol(Elf32_Word s) { setSymbolAndType(s, getType()); }
643 void setType(unsigned char t) { setSymbolAndType(getSymbol(), t); }
644 void setSymbolAndType(Elf64_Xword s, unsigned char t) {
645 r_info = (s << 32) + (t&0xffffffffL);
649 // Relocation entry with explicit addend.
651 Elf64_Addr r_offset; // Location (file byte offset, or program virtual addr).
652 Elf64_Xword r_info; // Symbol table index and type of relocation to apply.
653 Elf64_Sxword r_addend; // Compute value for relocatable field by adding this.
655 // These accessors and mutators correspond to the ELF64_R_SYM, ELF64_R_TYPE,
656 // and ELF64_R_INFO macros defined in the ELF specification:
657 Elf64_Xword getSymbol() const { return (r_info >> 32); }
658 unsigned char getType() const {
659 return (unsigned char) (r_info & 0xffffffffL);
661 void setSymbol(Elf64_Xword s) { setSymbolAndType(s, getType()); }
662 void setType(unsigned char t) { setSymbolAndType(getSymbol(), t); }
663 void setSymbolAndType(Elf64_Xword s, unsigned char t) {
664 r_info = (s << 32) + (t&0xffffffffL);
668 // Program header for ELF32.
670 Elf32_Word p_type; // Type of segment
671 Elf32_Off p_offset; // File offset where segment is located, in bytes
672 Elf32_Addr p_vaddr; // Virtual address of beginning of segment
673 Elf32_Addr p_paddr; // Physical address of beginning of segment (OS-specific)
674 Elf32_Word p_filesz; // Num. of bytes in file image of segment (may be zero)
675 Elf32_Word p_memsz; // Num. of bytes in mem image of segment (may be zero)
676 Elf32_Word p_flags; // Segment flags
677 Elf32_Word p_align; // Segment alignment constraint
680 // Program header for ELF64.
682 Elf64_Word p_type; // Type of segment
683 Elf64_Word p_flags; // Segment flags
684 Elf64_Off p_offset; // File offset where segment is located, in bytes
685 Elf64_Addr p_vaddr; // Virtual address of beginning of segment
686 Elf64_Addr p_paddr; // Physical address of beginning of segment (OS-specific)
687 Elf64_Xword p_filesz; // Num. of bytes in file image of segment (may be zero)
688 Elf64_Xword p_memsz; // Num. of bytes in mem image of segment (may be zero)
689 Elf64_Xword p_align; // Segment alignment constraint
694 PT_NULL = 0, // Unused segment.
695 PT_LOAD = 1, // Loadable segment.
696 PT_DYNAMIC = 2, // Dynamic linking information.
697 PT_INTERP = 3, // Interpreter pathname.
698 PT_NOTE = 4, // Auxiliary information.
699 PT_SHLIB = 5, // Reserved.
700 PT_PHDR = 6, // The program header table itself.
701 PT_LOPROC = 0x70000000, // Lowest processor-specific program hdr entry type.
702 PT_HIPROC = 0x7fffffff // Highest processor-specific program hdr entry type.
705 // Segment flag bits.
710 PF_MASKPROC = 0xf0000000 // Unspecified
713 // Dynamic table entry for ELF32.
716 Elf32_Sword d_tag; // Type of dynamic table entry.
719 Elf32_Word d_val; // Integer value of entry.
720 Elf32_Addr d_ptr; // Pointer value of entry.
724 // Dynamic table entry for ELF64.
727 Elf64_Sxword d_tag; // Type of dynamic table entry.
730 Elf64_Xword d_val; // Integer value of entry.
731 Elf64_Addr d_ptr; // Pointer value of entry.
735 // Dynamic table entry tags.
737 DT_NULL = 0, // Marks end of dynamic array.
738 DT_NEEDED = 1, // String table offset of needed library.
739 DT_PLTRELSZ = 2, // Size of relocation entries in PLT.
740 DT_PLTGOT = 3, // Address associated with linkage table.
741 DT_HASH = 4, // Address of symbolic hash table.
742 DT_STRTAB = 5, // Address of dynamic string table.
743 DT_SYMTAB = 6, // Address of dynamic symbol table.
744 DT_RELA = 7, // Address of relocation table (Rela entries).
745 DT_RELASZ = 8, // Size of Rela relocation table.
746 DT_RELAENT = 9, // Size of a Rela relocation entry.
747 DT_STRSZ = 10, // Total size of the string table.
748 DT_SYMENT = 11, // Size of a symbol table entry.
749 DT_INIT = 12, // Address of initialization function.
750 DT_FINI = 13, // Address of termination function.
751 DT_SONAME = 14, // String table offset of a shared objects name.
752 DT_RPATH = 15, // String table offset of library search path.
753 DT_SYMBOLIC = 16, // Changes symbol resolution algorithm.
754 DT_REL = 17, // Address of relocation table (Rel entries).
755 DT_RELSZ = 18, // Size of Rel relocation table.
756 DT_RELENT = 19, // Size of a Rel relocation entry.
757 DT_PLTREL = 20, // Type of relocation entry used for linking.
758 DT_DEBUG = 21, // Reserved for debugger.
759 DT_TEXTREL = 22, // Relocations exist for non-writable segements.
760 DT_JMPREL = 23, // Address of relocations associated with PLT.
761 DT_BIND_NOW = 24, // Process all relocations before execution.
762 DT_INIT_ARRAY = 25, // Pointer to array of initialization functions.
763 DT_FINI_ARRAY = 26, // Pointer to array of termination functions.
764 DT_INIT_ARRAYSZ = 27, // Size of DT_INIT_ARRAY.
765 DT_FINI_ARRAYSZ = 28, // Size of DT_FINI_ARRAY.
766 DT_LOOS = 0x60000000, // Start of environment specific tags.
767 DT_HIOS = 0x6FFFFFFF, // End of environment specific tags.
768 DT_LOPROC = 0x70000000, // Start of processor specific tags.
769 DT_HIPROC = 0x7FFFFFFF // End of processor specific tags.
772 } // end namespace ELF
774 } // end namespace llvm