1 //===-- llvm/Support/ELF.h - ELF constants and data structures --*- C++ -*-===//
2 //
3 // The LLVM Compiler Infrastructure
4 //
5 // This file is distributed under the University of Illinois Open Source
6 // License. See LICENSE.TXT for details.
7 //
8 //===----------------------------------------------------------------------===//
9 //
10 // This header contains common, non-processor-specific data structures and
11 // constants for the ELF file format.
12 //
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.
17 //
18 //===----------------------------------------------------------------------===//
19
20 #ifndef LLVM_SUPPORT_ELF_H
21 #define LLVM_SUPPORT_ELF_H
22
23 #include "llvm/Support/Compiler.h"
24 #include "llvm/Support/DataTypes.h"
25 #include <cstring>
26
27 namespace llvm {
28
29 namespace ELF {
30
31 typedef uint32_t Elf32_Addr; // Program address
32 typedef uint32_t Elf32_Off; // File offset
33 typedef uint16_t Elf32_Half;
34 typedef uint32_t Elf32_Word;
35 typedef int32_t Elf32_Sword;
36
37 typedef uint64_t Elf64_Addr;
38 typedef uint64_t Elf64_Off;
39 typedef uint16_t Elf64_Half;
40 typedef uint32_t Elf64_Word;
41 typedef int32_t Elf64_Sword;
42 typedef uint64_t Elf64_Xword;
43 typedef int64_t Elf64_Sxword;
44
45 // Object file magic string.
46 static const char ElfMagic[] = { 0x7f, 'E', 'L', 'F', '\0' };
47
48 // e_ident size and indices.
49 enum {
50 EI_MAG0 = 0, // File identification index.
51 EI_MAG1 = 1, // File identification index.
52 EI_MAG2 = 2, // File identification index.
53 EI_MAG3 = 3, // File identification index.
54 EI_CLASS = 4, // File class.
55 EI_DATA = 5, // Data encoding.
56 EI_VERSION = 6, // File version.
57 EI_OSABI = 7, // OS/ABI identification.
58 EI_ABIVERSION = 8, // ABI version.
59 EI_PAD = 9, // Start of padding bytes.
60 EI_NIDENT = 16 // Number of bytes in e_ident.
61 };
62
63 struct Elf32_Ehdr {
64 unsigned char e_ident[EI_NIDENT]; // ELF Identification bytes
65 Elf32_Half e_type; // Type of file (see ET_* below)
66 Elf32_Half e_machine; // Required architecture for this file (see EM_*)
67 Elf32_Word e_version; // Must be equal to 1
68 Elf32_Addr e_entry; // Address to jump to in order to start program
69 Elf32_Off e_phoff; // Program header table's file offset, in bytes
70 Elf32_Off e_shoff; // Section header table's file offset, in bytes
71 Elf32_Word e_flags; // Processor-specific flags
72 Elf32_Half e_ehsize; // Size of ELF header, in bytes
73 Elf32_Half e_phentsize; // Size of an entry in the program header table
74 Elf32_Half e_phnum; // Number of entries in the program header table
75 Elf32_Half e_shentsize; // Size of an entry in the section header table
76 Elf32_Half e_shnum; // Number of entries in the section header table
77 Elf32_Half e_shstrndx; // Sect hdr table index of sect name string table
checkMagicElf32_Ehdr78 bool checkMagic() const {
79 return (memcmp(e_ident, ElfMagic, strlen(ElfMagic))) == 0;
80 }
getFileClassElf32_Ehdr81 unsigned char getFileClass() const { return e_ident[EI_CLASS]; }
getDataEncodingElf32_Ehdr82 unsigned char getDataEncoding() const { return e_ident[EI_DATA]; }
83 };
84
85 // 64-bit ELF header. Fields are the same as for ELF32, but with different
86 // types (see above).
87 struct Elf64_Ehdr {
88 unsigned char e_ident[EI_NIDENT];
89 Elf64_Half e_type;
90 Elf64_Half e_machine;
91 Elf64_Word e_version;
92 Elf64_Addr e_entry;
93 Elf64_Off e_phoff;
94 Elf64_Off e_shoff;
95 Elf64_Word e_flags;
96 Elf64_Half e_ehsize;
97 Elf64_Half e_phentsize;
98 Elf64_Half e_phnum;
99 Elf64_Half e_shentsize;
100 Elf64_Half e_shnum;
101 Elf64_Half e_shstrndx;
checkMagicElf64_Ehdr102 bool checkMagic() const {
103 return (memcmp(e_ident, ElfMagic, strlen(ElfMagic))) == 0;
104 }
getFileClassElf64_Ehdr105 unsigned char getFileClass() const { return e_ident[EI_CLASS]; }
getDataEncodingElf64_Ehdr106 unsigned char getDataEncoding() const { return e_ident[EI_DATA]; }
107 };
108
109 // File types
110 enum {
111 ET_NONE = 0, // No file type
112 ET_REL = 1, // Relocatable file
113 ET_EXEC = 2, // Executable file
114 ET_DYN = 3, // Shared object file
115 ET_CORE = 4, // Core file
116 ET_LOPROC = 0xff00, // Beginning of processor-specific codes
117 ET_HIPROC = 0xffff // Processor-specific
118 };
119
120 // Versioning
121 enum {
122 EV_NONE = 0,
123 EV_CURRENT = 1
124 };
125
126 // Machine architectures
127 // See current registered ELF machine architectures at:
128 // http://www.uxsglobal.com/developers/gabi/latest/ch4.eheader.html
129 enum {
130 EM_NONE = 0, // No machine
131 EM_M32 = 1, // AT&T WE 32100
132 EM_SPARC = 2, // SPARC
133 EM_386 = 3, // Intel 386
134 EM_68K = 4, // Motorola 68000
135 EM_88K = 5, // Motorola 88000
136 EM_486 = 6, // Intel 486 (deprecated)
137 EM_860 = 7, // Intel 80860
138 EM_MIPS = 8, // MIPS R3000
139 EM_S370 = 9, // IBM System/370
140 EM_MIPS_RS3_LE = 10, // MIPS RS3000 Little-endian
141 EM_PARISC = 15, // Hewlett-Packard PA-RISC
142 EM_VPP500 = 17, // Fujitsu VPP500
143 EM_SPARC32PLUS = 18, // Enhanced instruction set SPARC
144 EM_960 = 19, // Intel 80960
145 EM_PPC = 20, // PowerPC
146 EM_PPC64 = 21, // PowerPC64
147 EM_S390 = 22, // IBM System/390
148 EM_SPU = 23, // IBM SPU/SPC
149 EM_V800 = 36, // NEC V800
150 EM_FR20 = 37, // Fujitsu FR20
151 EM_RH32 = 38, // TRW RH-32
152 EM_RCE = 39, // Motorola RCE
153 EM_ARM = 40, // ARM
154 EM_ALPHA = 41, // DEC Alpha
155 EM_SH = 42, // Hitachi SH
156 EM_SPARCV9 = 43, // SPARC V9
157 EM_TRICORE = 44, // Siemens TriCore
158 EM_ARC = 45, // Argonaut RISC Core
159 EM_H8_300 = 46, // Hitachi H8/300
160 EM_H8_300H = 47, // Hitachi H8/300H
161 EM_H8S = 48, // Hitachi H8S
162 EM_H8_500 = 49, // Hitachi H8/500
163 EM_IA_64 = 50, // Intel IA-64 processor architecture
164 EM_MIPS_X = 51, // Stanford MIPS-X
165 EM_COLDFIRE = 52, // Motorola ColdFire
166 EM_68HC12 = 53, // Motorola M68HC12
167 EM_MMA = 54, // Fujitsu MMA Multimedia Accelerator
168 EM_PCP = 55, // Siemens PCP
169 EM_NCPU = 56, // Sony nCPU embedded RISC processor
170 EM_NDR1 = 57, // Denso NDR1 microprocessor
171 EM_STARCORE = 58, // Motorola Star*Core processor
172 EM_ME16 = 59, // Toyota ME16 processor
173 EM_ST100 = 60, // STMicroelectronics ST100 processor
174 EM_TINYJ = 61, // Advanced Logic Corp. TinyJ embedded processor family
175 EM_X86_64 = 62, // AMD x86-64 architecture
176 EM_PDSP = 63, // Sony DSP Processor
177 EM_PDP10 = 64, // Digital Equipment Corp. PDP-10
178 EM_PDP11 = 65, // Digital Equipment Corp. PDP-11
179 EM_FX66 = 66, // Siemens FX66 microcontroller
180 EM_ST9PLUS = 67, // STMicroelectronics ST9+ 8/16 bit microcontroller
181 EM_ST7 = 68, // STMicroelectronics ST7 8-bit microcontroller
182 EM_68HC16 = 69, // Motorola MC68HC16 Microcontroller
183 EM_68HC11 = 70, // Motorola MC68HC11 Microcontroller
184 EM_68HC08 = 71, // Motorola MC68HC08 Microcontroller
185 EM_68HC05 = 72, // Motorola MC68HC05 Microcontroller
186 EM_SVX = 73, // Silicon Graphics SVx
187 EM_ST19 = 74, // STMicroelectronics ST19 8-bit microcontroller
188 EM_VAX = 75, // Digital VAX
189 EM_CRIS = 76, // Axis Communications 32-bit embedded processor
190 EM_JAVELIN = 77, // Infineon Technologies 32-bit embedded processor
191 EM_FIREPATH = 78, // Element 14 64-bit DSP Processor
192 EM_ZSP = 79, // LSI Logic 16-bit DSP Processor
193 EM_MMIX = 80, // Donald Knuth's educational 64-bit processor
194 EM_HUANY = 81, // Harvard University machine-independent object files
195 EM_PRISM = 82, // SiTera Prism
196 EM_AVR = 83, // Atmel AVR 8-bit microcontroller
197 EM_FR30 = 84, // Fujitsu FR30
198 EM_D10V = 85, // Mitsubishi D10V
199 EM_D30V = 86, // Mitsubishi D30V
200 EM_V850 = 87, // NEC v850
201 EM_M32R = 88, // Mitsubishi M32R
202 EM_MN10300 = 89, // Matsushita MN10300
203 EM_MN10200 = 90, // Matsushita MN10200
204 EM_PJ = 91, // picoJava
205 EM_OPENRISC = 92, // OpenRISC 32-bit embedded processor
206 EM_ARC_COMPACT = 93, // ARC International ARCompact processor (old
207 // spelling/synonym: EM_ARC_A5)
208 EM_XTENSA = 94, // Tensilica Xtensa Architecture
209 EM_VIDEOCORE = 95, // Alphamosaic VideoCore processor
210 EM_TMM_GPP = 96, // Thompson Multimedia General Purpose Processor
211 EM_NS32K = 97, // National Semiconductor 32000 series
212 EM_TPC = 98, // Tenor Network TPC processor
213 EM_SNP1K = 99, // Trebia SNP 1000 processor
214 EM_ST200 = 100, // STMicroelectronics (www.st.com) ST200
215 EM_IP2K = 101, // Ubicom IP2xxx microcontroller family
216 EM_MAX = 102, // MAX Processor
217 EM_CR = 103, // National Semiconductor CompactRISC microprocessor
218 EM_F2MC16 = 104, // Fujitsu F2MC16
219 EM_MSP430 = 105, // Texas Instruments embedded microcontroller msp430
220 EM_BLACKFIN = 106, // Analog Devices Blackfin (DSP) processor
221 EM_SE_C33 = 107, // S1C33 Family of Seiko Epson processors
222 EM_SEP = 108, // Sharp embedded microprocessor
223 EM_ARCA = 109, // Arca RISC Microprocessor
224 EM_UNICORE = 110, // Microprocessor series from PKU-Unity Ltd. and MPRC
225 // of Peking University
226 EM_EXCESS = 111, // eXcess: 16/32/64-bit configurable embedded CPU
227 EM_DXP = 112, // Icera Semiconductor Inc. Deep Execution Processor
228 EM_ALTERA_NIOS2 = 113, // Altera Nios II soft-core processor
229 EM_CRX = 114, // National Semiconductor CompactRISC CRX
230 EM_XGATE = 115, // Motorola XGATE embedded processor
231 EM_C166 = 116, // Infineon C16x/XC16x processor
232 EM_M16C = 117, // Renesas M16C series microprocessors
233 EM_DSPIC30F = 118, // Microchip Technology dsPIC30F Digital Signal
234 // Controller
235 EM_CE = 119, // Freescale Communication Engine RISC core
236 EM_M32C = 120, // Renesas M32C series microprocessors
237 EM_TSK3000 = 131, // Altium TSK3000 core
238 EM_RS08 = 132, // Freescale RS08 embedded processor
239 EM_SHARC = 133, // Analog Devices SHARC family of 32-bit DSP
240 // processors
241 EM_ECOG2 = 134, // Cyan Technology eCOG2 microprocessor
242 EM_SCORE7 = 135, // Sunplus S+core7 RISC processor
243 EM_DSP24 = 136, // New Japan Radio (NJR) 24-bit DSP Processor
244 EM_VIDEOCORE3 = 137, // Broadcom VideoCore III processor
245 EM_LATTICEMICO32 = 138, // RISC processor for Lattice FPGA architecture
246 EM_SE_C17 = 139, // Seiko Epson C17 family
247 EM_TI_C6000 = 140, // The Texas Instruments TMS320C6000 DSP family
248 EM_TI_C2000 = 141, // The Texas Instruments TMS320C2000 DSP family
249 EM_TI_C5500 = 142, // The Texas Instruments TMS320C55x DSP family
250 EM_MMDSP_PLUS = 160, // STMicroelectronics 64bit VLIW Data Signal Processor
251 EM_CYPRESS_M8C = 161, // Cypress M8C microprocessor
252 EM_R32C = 162, // Renesas R32C series microprocessors
253 EM_TRIMEDIA = 163, // NXP Semiconductors TriMedia architecture family
254 EM_HEXAGON = 164, // Qualcomm Hexagon processor
255 EM_8051 = 165, // Intel 8051 and variants
256 EM_STXP7X = 166, // STMicroelectronics STxP7x family of configurable
257 // and extensible RISC processors
258 EM_NDS32 = 167, // Andes Technology compact code size embedded RISC
259 // processor family
260 EM_ECOG1 = 168, // Cyan Technology eCOG1X family
261 EM_ECOG1X = 168, // Cyan Technology eCOG1X family
262 EM_MAXQ30 = 169, // Dallas Semiconductor MAXQ30 Core Micro-controllers
263 EM_XIMO16 = 170, // New Japan Radio (NJR) 16-bit DSP Processor
264 EM_MANIK = 171, // M2000 Reconfigurable RISC Microprocessor
265 EM_CRAYNV2 = 172, // Cray Inc. NV2 vector architecture
266 EM_RX = 173, // Renesas RX family
267 EM_METAG = 174, // Imagination Technologies META processor
268 // architecture
269 EM_MCST_ELBRUS = 175, // MCST Elbrus general purpose hardware architecture
270 EM_ECOG16 = 176, // Cyan Technology eCOG16 family
271 EM_CR16 = 177, // National Semiconductor CompactRISC CR16 16-bit
272 // microprocessor
273 EM_ETPU = 178, // Freescale Extended Time Processing Unit
274 EM_SLE9X = 179, // Infineon Technologies SLE9X core
275 EM_L10M = 180, // Intel L10M
276 EM_K10M = 181, // Intel K10M
277 EM_AARCH64 = 183, // ARM AArch64
278 EM_AVR32 = 185, // Atmel Corporation 32-bit microprocessor family
279 EM_STM8 = 186, // STMicroeletronics STM8 8-bit microcontroller
280 EM_TILE64 = 187, // Tilera TILE64 multicore architecture family
281 EM_TILEPRO = 188, // Tilera TILEPro multicore architecture family
282 EM_CUDA = 190, // NVIDIA CUDA architecture
283 EM_TILEGX = 191, // Tilera TILE-Gx multicore architecture family
284 EM_CLOUDSHIELD = 192, // CloudShield architecture family
285 EM_COREA_1ST = 193, // KIPO-KAIST Core-A 1st generation processor family
286 EM_COREA_2ND = 194, // KIPO-KAIST Core-A 2nd generation processor family
287 EM_ARC_COMPACT2 = 195, // Synopsys ARCompact V2
288 EM_OPEN8 = 196, // Open8 8-bit RISC soft processor core
289 EM_RL78 = 197, // Renesas RL78 family
290 EM_VIDEOCORE5 = 198, // Broadcom VideoCore V processor
291 EM_78KOR = 199, // Renesas 78KOR family
292 EM_56800EX = 200, // Freescale 56800EX Digital Signal Controller (DSC)
293 EM_BA1 = 201, // Beyond BA1 CPU architecture
294 EM_BA2 = 202, // Beyond BA2 CPU architecture
295 EM_XCORE = 203, // XMOS xCORE processor family
296 EM_MCHP_PIC = 204, // Microchip 8-bit PIC(r) family
297 EM_INTEL205 = 205, // Reserved by Intel
298 EM_INTEL206 = 206, // Reserved by Intel
299 EM_INTEL207 = 207, // Reserved by Intel
300 EM_INTEL208 = 208, // Reserved by Intel
301 EM_INTEL209 = 209, // Reserved by Intel
302 EM_KM32 = 210, // KM211 KM32 32-bit processor
303 EM_KMX32 = 211, // KM211 KMX32 32-bit processor
304 EM_KMX16 = 212, // KM211 KMX16 16-bit processor
305 EM_KMX8 = 213, // KM211 KMX8 8-bit processor
306 EM_KVARC = 214, // KM211 KVARC processor
307 EM_CDP = 215, // Paneve CDP architecture family
308 EM_COGE = 216, // Cognitive Smart Memory Processor
309 EM_COOL = 217, // iCelero CoolEngine
310 EM_NORC = 218, // Nanoradio Optimized RISC
311 EM_CSR_KALIMBA = 219 // CSR Kalimba architecture family
312 };
313
314 // Object file classes.
315 enum {
316 ELFCLASSNONE = 0,
317 ELFCLASS32 = 1, // 32-bit object file
318 ELFCLASS64 = 2 // 64-bit object file
319 };
320
321 // Object file byte orderings.
322 enum {
323 ELFDATANONE = 0, // Invalid data encoding.
324 ELFDATA2LSB = 1, // Little-endian object file
325 ELFDATA2MSB = 2 // Big-endian object file
326 };
327
328 // OS ABI identification.
329 enum {
330 ELFOSABI_NONE = 0, // UNIX System V ABI
331 ELFOSABI_HPUX = 1, // HP-UX operating system
332 ELFOSABI_NETBSD = 2, // NetBSD
333 ELFOSABI_GNU = 3, // GNU/Linux
334 ELFOSABI_LINUX = 3, // Historical alias for ELFOSABI_GNU.
335 ELFOSABI_HURD = 4, // GNU/Hurd
336 ELFOSABI_SOLARIS = 6, // Solaris
337 ELFOSABI_AIX = 7, // AIX
338 ELFOSABI_IRIX = 8, // IRIX
339 ELFOSABI_FREEBSD = 9, // FreeBSD
340 ELFOSABI_TRU64 = 10, // TRU64 UNIX
341 ELFOSABI_MODESTO = 11, // Novell Modesto
342 ELFOSABI_OPENBSD = 12, // OpenBSD
343 ELFOSABI_OPENVMS = 13, // OpenVMS
344 ELFOSABI_NSK = 14, // Hewlett-Packard Non-Stop Kernel
345 ELFOSABI_AROS = 15, // AROS
346 ELFOSABI_FENIXOS = 16, // FenixOS
347 ELFOSABI_C6000_ELFABI = 64, // Bare-metal TMS320C6000
348 ELFOSABI_C6000_LINUX = 65, // Linux TMS320C6000
349 ELFOSABI_ARM = 97, // ARM
350 ELFOSABI_STANDALONE = 255 // Standalone (embedded) application
351 };
352
353 #define ELF_RELOC(name, value) name = value,
354
355 // X86_64 relocations.
356 enum {
357 #include "ELFRelocs/x86_64.def"
358 };
359
360 // i386 relocations.
361 enum {
362 #include "ELFRelocs/i386.def"
363 };
364
365 // ELF Relocation types for PPC32
366 enum {
367 #include "ELFRelocs/PowerPC.def"
368 };
369
370 // Specific e_flags for PPC64
371 enum {
372 // e_flags bits specifying ABI:
373 // 1 for original ABI using function descriptors,
374 // 2 for revised ABI without function descriptors,
375 // 0 for unspecified or not using any features affected by the differences.
376 EF_PPC64_ABI = 3
377 };
378
379 // Special values for the st_other field in the symbol table entry for PPC64.
380 enum {
381 STO_PPC64_LOCAL_BIT = 5,
382 STO_PPC64_LOCAL_MASK = (7 << STO_PPC64_LOCAL_BIT)
383 };
384 static inline int64_t
decodePPC64LocalEntryOffset(unsigned Other)385 decodePPC64LocalEntryOffset(unsigned Other) {
386 unsigned Val = (Other & STO_PPC64_LOCAL_MASK) >> STO_PPC64_LOCAL_BIT;
387 return ((1 << Val) >> 2) << 2;
388 }
389 static inline unsigned
encodePPC64LocalEntryOffset(int64_t Offset)390 encodePPC64LocalEntryOffset(int64_t Offset) {
391 unsigned Val = (Offset >= 4 * 4
392 ? (Offset >= 8 * 4
393 ? (Offset >= 16 * 4 ? 6 : 5)
394 : 4)
395 : (Offset >= 2 * 4
396 ? 3
397 : (Offset >= 1 * 4 ? 2 : 0)));
398 return Val << STO_PPC64_LOCAL_BIT;
399 }
400
401 // ELF Relocation types for PPC64
402 enum {
403 #include "ELFRelocs/PowerPC64.def"
404 };
405
406 // ELF Relocation types for AArch64
407 enum {
408 #include "ELFRelocs/AArch64.def"
409 };
410
411 // ARM Specific e_flags
412 enum : unsigned {
413 EF_ARM_SOFT_FLOAT = 0x00000200U,
414 EF_ARM_VFP_FLOAT = 0x00000400U,
415 EF_ARM_EABI_UNKNOWN = 0x00000000U,
416 EF_ARM_EABI_VER1 = 0x01000000U,
417 EF_ARM_EABI_VER2 = 0x02000000U,
418 EF_ARM_EABI_VER3 = 0x03000000U,
419 EF_ARM_EABI_VER4 = 0x04000000U,
420 EF_ARM_EABI_VER5 = 0x05000000U,
421 EF_ARM_EABIMASK = 0xFF000000U
422 };
423
424 // ELF Relocation types for ARM
425 enum {
426 #include "ELFRelocs/ARM.def"
427 };
428
429 // Mips Specific e_flags
430 enum : unsigned {
431 EF_MIPS_NOREORDER = 0x00000001, // Don't reorder instructions
432 EF_MIPS_PIC = 0x00000002, // Position independent code
433 EF_MIPS_CPIC = 0x00000004, // Call object with Position independent code
434 EF_MIPS_ABI2 = 0x00000020,
435 EF_MIPS_32BITMODE = 0x00000100,
436 EF_MIPS_NAN2008 = 0x00000400, // Uses IEE 754-2008 NaN encoding
437
438 // ABI flags
439 EF_MIPS_ABI_O32 = 0x00001000, // This file follows the first MIPS 32 bit ABI
440 EF_MIPS_ABI_O64 = 0x00002000, // O32 ABI extended for 64-bit architecture.
441 EF_MIPS_ABI_EABI32 = 0x00003000, // EABI in 32 bit mode.
442 EF_MIPS_ABI_EABI64 = 0x00004000, // EABI in 64 bit mode.
443 EF_MIPS_ABI = 0x0000f000, // Mask for selecting EF_MIPS_ABI_ variant.
444
445 //ARCH_ASE
446 EF_MIPS_MICROMIPS = 0x02000000, // microMIPS
447 EF_MIPS_ARCH_ASE_M16 =
448 0x04000000, // Has Mips-16 ISA extensions
449 //ARCH
450 EF_MIPS_ARCH_1 = 0x00000000, // MIPS1 instruction set
451 EF_MIPS_ARCH_2 = 0x10000000, // MIPS2 instruction set
452 EF_MIPS_ARCH_3 = 0x20000000, // MIPS3 instruction set
453 EF_MIPS_ARCH_4 = 0x30000000, // MIPS4 instruction set
454 EF_MIPS_ARCH_5 = 0x40000000, // MIPS5 instruction set
455 EF_MIPS_ARCH_32 = 0x50000000, // MIPS32 instruction set per linux not elf.h
456 EF_MIPS_ARCH_64 = 0x60000000, // MIPS64 instruction set per linux not elf.h
457 EF_MIPS_ARCH_32R2 = 0x70000000, // mips32r2
458 EF_MIPS_ARCH_64R2 = 0x80000000, // mips64r2
459 EF_MIPS_ARCH_32R6 = 0x90000000, // mips32r6
460 EF_MIPS_ARCH_64R6 = 0xa0000000, // mips64r6
461 EF_MIPS_ARCH = 0xf0000000 // Mask for applying EF_MIPS_ARCH_ variant
462 };
463
464 // ELF Relocation types for Mips
465 enum {
466 #include "ELFRelocs/Mips.def"
467 };
468
469 // Special values for the st_other field in the symbol table entry for MIPS.
470 enum {
471 STO_MIPS_OPTIONAL = 0x04, // Symbol whose definition is optional
472 STO_MIPS_PLT = 0x08, // PLT entry related dynamic table record
473 STO_MIPS_PIC = 0x20, // PIC func in an object mixes PIC/non-PIC
474 STO_MIPS_MICROMIPS = 0x80, // MIPS Specific ISA for MicroMips
475 STO_MIPS_MIPS16 = 0xf0 // MIPS Specific ISA for Mips16
476 };
477
478 // Hexagon Specific e_flags
479 // Release 5 ABI
480 enum {
481 // Object processor version flags, bits[3:0]
482 EF_HEXAGON_MACH_V2 = 0x00000001, // Hexagon V2
483 EF_HEXAGON_MACH_V3 = 0x00000002, // Hexagon V3
484 EF_HEXAGON_MACH_V4 = 0x00000003, // Hexagon V4
485 EF_HEXAGON_MACH_V5 = 0x00000004, // Hexagon V5
486
487 // Highest ISA version flags
488 EF_HEXAGON_ISA_MACH = 0x00000000, // Same as specified in bits[3:0]
489 // of e_flags
490 EF_HEXAGON_ISA_V2 = 0x00000010, // Hexagon V2 ISA
491 EF_HEXAGON_ISA_V3 = 0x00000020, // Hexagon V3 ISA
492 EF_HEXAGON_ISA_V4 = 0x00000030, // Hexagon V4 ISA
493 EF_HEXAGON_ISA_V5 = 0x00000040 // Hexagon V5 ISA
494 };
495
496 // Hexagon specific Section indexes for common small data
497 // Release 5 ABI
498 enum {
499 SHN_HEXAGON_SCOMMON = 0xff00, // Other access sizes
500 SHN_HEXAGON_SCOMMON_1 = 0xff01, // Byte-sized access
501 SHN_HEXAGON_SCOMMON_2 = 0xff02, // Half-word-sized access
502 SHN_HEXAGON_SCOMMON_4 = 0xff03, // Word-sized access
503 SHN_HEXAGON_SCOMMON_8 = 0xff04 // Double-word-size access
504 };
505
506 // ELF Relocation types for Hexagon
507 enum {
508 #include "ELFRelocs/Hexagon.def"
509 };
510
511 // ELF Relocation types for S390/zSeries
512 enum {
513 #include "ELFRelocs/SystemZ.def"
514 };
515
516 // ELF Relocation type for Sparc.
517 enum {
518 #include "ELFRelocs/Sparc.def"
519 };
520
521 #undef ELF_RELOC
522
523 // Section header.
524 struct Elf32_Shdr {
525 Elf32_Word sh_name; // Section name (index into string table)
526 Elf32_Word sh_type; // Section type (SHT_*)
527 Elf32_Word sh_flags; // Section flags (SHF_*)
528 Elf32_Addr sh_addr; // Address where section is to be loaded
529 Elf32_Off sh_offset; // File offset of section data, in bytes
530 Elf32_Word sh_size; // Size of section, in bytes
531 Elf32_Word sh_link; // Section type-specific header table index link
532 Elf32_Word sh_info; // Section type-specific extra information
533 Elf32_Word sh_addralign; // Section address alignment
534 Elf32_Word sh_entsize; // Size of records contained within the section
535 };
536
537 // Section header for ELF64 - same fields as ELF32, different types.
538 struct Elf64_Shdr {
539 Elf64_Word sh_name;
540 Elf64_Word sh_type;
541 Elf64_Xword sh_flags;
542 Elf64_Addr sh_addr;
543 Elf64_Off sh_offset;
544 Elf64_Xword sh_size;
545 Elf64_Word sh_link;
546 Elf64_Word sh_info;
547 Elf64_Xword sh_addralign;
548 Elf64_Xword sh_entsize;
549 };
550
551 // Special section indices.
552 enum {
553 SHN_UNDEF = 0, // Undefined, missing, irrelevant, or meaningless
554 SHN_LORESERVE = 0xff00, // Lowest reserved index
555 SHN_LOPROC = 0xff00, // Lowest processor-specific index
556 SHN_HIPROC = 0xff1f, // Highest processor-specific index
557 SHN_LOOS = 0xff20, // Lowest operating system-specific index
558 SHN_HIOS = 0xff3f, // Highest operating system-specific index
559 SHN_ABS = 0xfff1, // Symbol has absolute value; does not need relocation
560 SHN_COMMON = 0xfff2, // FORTRAN COMMON or C external global variables
561 SHN_XINDEX = 0xffff, // Mark that the index is >= SHN_LORESERVE
562 SHN_HIRESERVE = 0xffff // Highest reserved index
563 };
564
565 // Section types.
566 enum : unsigned {
567 SHT_NULL = 0, // No associated section (inactive entry).
568 SHT_PROGBITS = 1, // Program-defined contents.
569 SHT_SYMTAB = 2, // Symbol table.
570 SHT_STRTAB = 3, // String table.
571 SHT_RELA = 4, // Relocation entries; explicit addends.
572 SHT_HASH = 5, // Symbol hash table.
573 SHT_DYNAMIC = 6, // Information for dynamic linking.
574 SHT_NOTE = 7, // Information about the file.
575 SHT_NOBITS = 8, // Data occupies no space in the file.
576 SHT_REL = 9, // Relocation entries; no explicit addends.
577 SHT_SHLIB = 10, // Reserved.
578 SHT_DYNSYM = 11, // Symbol table.
579 SHT_INIT_ARRAY = 14, // Pointers to initialization functions.
580 SHT_FINI_ARRAY = 15, // Pointers to termination functions.
581 SHT_PREINIT_ARRAY = 16, // Pointers to pre-init functions.
582 SHT_GROUP = 17, // Section group.
583 SHT_SYMTAB_SHNDX = 18, // Indices for SHN_XINDEX entries.
584 SHT_LOOS = 0x60000000, // Lowest operating system-specific type.
585 SHT_GNU_ATTRIBUTES= 0x6ffffff5, // Object attributes.
586 SHT_GNU_HASH = 0x6ffffff6, // GNU-style hash table.
587 SHT_GNU_verdef = 0x6ffffffd, // GNU version definitions.
588 SHT_GNU_verneed = 0x6ffffffe, // GNU version references.
589 SHT_GNU_versym = 0x6fffffff, // GNU symbol versions table.
590 SHT_HIOS = 0x6fffffff, // Highest operating system-specific type.
591 SHT_LOPROC = 0x70000000, // Lowest processor arch-specific type.
592 // Fixme: All this is duplicated in MCSectionELF. Why??
593 // Exception Index table
594 SHT_ARM_EXIDX = 0x70000001U,
595 // BPABI DLL dynamic linking pre-emption map
596 SHT_ARM_PREEMPTMAP = 0x70000002U,
597 // Object file compatibility attributes
598 SHT_ARM_ATTRIBUTES = 0x70000003U,
599 SHT_ARM_DEBUGOVERLAY = 0x70000004U,
600 SHT_ARM_OVERLAYSECTION = 0x70000005U,
601 SHT_HEX_ORDERED = 0x70000000, // Link editor is to sort the entries in
602 // this section based on their sizes
603 SHT_X86_64_UNWIND = 0x70000001, // Unwind information
604
605 SHT_MIPS_REGINFO = 0x70000006, // Register usage information
606 SHT_MIPS_OPTIONS = 0x7000000d, // General options
607 SHT_MIPS_ABIFLAGS = 0x7000002a, // ABI information.
608
609 SHT_HIPROC = 0x7fffffff, // Highest processor arch-specific type.
610 SHT_LOUSER = 0x80000000, // Lowest type reserved for applications.
611 SHT_HIUSER = 0xffffffff // Highest type reserved for applications.
612 };
613
614 // Section flags.
615 enum : unsigned {
616 // Section data should be writable during execution.
617 SHF_WRITE = 0x1,
618
619 // Section occupies memory during program execution.
620 SHF_ALLOC = 0x2,
621
622 // Section contains executable machine instructions.
623 SHF_EXECINSTR = 0x4,
624
625 // The data in this section may be merged.
626 SHF_MERGE = 0x10,
627
628 // The data in this section is null-terminated strings.
629 SHF_STRINGS = 0x20,
630
631 // A field in this section holds a section header table index.
632 SHF_INFO_LINK = 0x40U,
633
634 // Adds special ordering requirements for link editors.
635 SHF_LINK_ORDER = 0x80U,
636
637 // This section requires special OS-specific processing to avoid incorrect
638 // behavior.
639 SHF_OS_NONCONFORMING = 0x100U,
640
641 // This section is a member of a section group.
642 SHF_GROUP = 0x200U,
643
644 // This section holds Thread-Local Storage.
645 SHF_TLS = 0x400U,
646
647 // This section is excluded from the final executable or shared library.
648 SHF_EXCLUDE = 0x80000000U,
649
650 // Start of target-specific flags.
651
652 /// XCORE_SHF_CP_SECTION - All sections with the "c" flag are grouped
653 /// together by the linker to form the constant pool and the cp register is
654 /// set to the start of the constant pool by the boot code.
655 XCORE_SHF_CP_SECTION = 0x800U,
656
657 /// XCORE_SHF_DP_SECTION - All sections with the "d" flag are grouped
658 /// together by the linker to form the data section and the dp register is
659 /// set to the start of the section by the boot code.
660 XCORE_SHF_DP_SECTION = 0x1000U,
661
662 SHF_MASKOS = 0x0ff00000,
663
664 // Bits indicating processor-specific flags.
665 SHF_MASKPROC = 0xf0000000,
666
667 // If an object file section does not have this flag set, then it may not hold
668 // more than 2GB and can be freely referred to in objects using smaller code
669 // models. Otherwise, only objects using larger code models can refer to them.
670 // For example, a medium code model object can refer to data in a section that
671 // sets this flag besides being able to refer to data in a section that does
672 // not set it; likewise, a small code model object can refer only to code in a
673 // section that does not set this flag.
674 SHF_X86_64_LARGE = 0x10000000,
675
676 // All sections with the GPREL flag are grouped into a global data area
677 // for faster accesses
678 SHF_HEX_GPREL = 0x10000000,
679
680 // Section contains text/data which may be replicated in other sections.
681 // Linker must retain only one copy.
682 SHF_MIPS_NODUPES = 0x01000000,
683
684 // Linker must generate implicit hidden weak names.
685 SHF_MIPS_NAMES = 0x02000000,
686
687 // Section data local to process.
688 SHF_MIPS_LOCAL = 0x04000000,
689
690 // Do not strip this section.
691 SHF_MIPS_NOSTRIP = 0x08000000,
692
693 // Section must be part of global data area.
694 SHF_MIPS_GPREL = 0x10000000,
695
696 // This section should be merged.
697 SHF_MIPS_MERGE = 0x20000000,
698
699 // Address size to be inferred from section entry size.
700 SHF_MIPS_ADDR = 0x40000000,
701
702 // Section data is string data by default.
703 SHF_MIPS_STRING = 0x80000000
704 };
705
706 // Section Group Flags
707 enum : unsigned {
708 GRP_COMDAT = 0x1,
709 GRP_MASKOS = 0x0ff00000,
710 GRP_MASKPROC = 0xf0000000
711 };
712
713 // Symbol table entries for ELF32.
714 struct Elf32_Sym {
715 Elf32_Word st_name; // Symbol name (index into string table)
716 Elf32_Addr st_value; // Value or address associated with the symbol
717 Elf32_Word st_size; // Size of the symbol
718 unsigned char st_info; // Symbol's type and binding attributes
719 unsigned char st_other; // Must be zero; reserved
720 Elf32_Half st_shndx; // Which section (header table index) it's defined in
721
722 // These accessors and mutators correspond to the ELF32_ST_BIND,
723 // ELF32_ST_TYPE, and ELF32_ST_INFO macros defined in the ELF specification:
getBindingElf32_Sym724 unsigned char getBinding() const { return st_info >> 4; }
getTypeElf32_Sym725 unsigned char getType() const { return st_info & 0x0f; }
setBindingElf32_Sym726 void setBinding(unsigned char b) { setBindingAndType(b, getType()); }
setTypeElf32_Sym727 void setType(unsigned char t) { setBindingAndType(getBinding(), t); }
setBindingAndTypeElf32_Sym728 void setBindingAndType(unsigned char b, unsigned char t) {
729 st_info = (b << 4) + (t & 0x0f);
730 }
731 };
732
733 // Symbol table entries for ELF64.
734 struct Elf64_Sym {
735 Elf64_Word st_name; // Symbol name (index into string table)
736 unsigned char st_info; // Symbol's type and binding attributes
737 unsigned char st_other; // Must be zero; reserved
738 Elf64_Half st_shndx; // Which section (header tbl index) it's defined in
739 Elf64_Addr st_value; // Value or address associated with the symbol
740 Elf64_Xword st_size; // Size of the symbol
741
742 // These accessors and mutators are identical to those defined for ELF32
743 // symbol table entries.
getBindingElf64_Sym744 unsigned char getBinding() const { return st_info >> 4; }
getTypeElf64_Sym745 unsigned char getType() const { return st_info & 0x0f; }
setBindingElf64_Sym746 void setBinding(unsigned char b) { setBindingAndType(b, getType()); }
setTypeElf64_Sym747 void setType(unsigned char t) { setBindingAndType(getBinding(), t); }
setBindingAndTypeElf64_Sym748 void setBindingAndType(unsigned char b, unsigned char t) {
749 st_info = (b << 4) + (t & 0x0f);
750 }
751 };
752
753 // The size (in bytes) of symbol table entries.
754 enum {
755 SYMENTRY_SIZE32 = 16, // 32-bit symbol entry size
756 SYMENTRY_SIZE64 = 24 // 64-bit symbol entry size.
757 };
758
759 // Symbol bindings.
760 enum {
761 STB_LOCAL = 0, // Local symbol, not visible outside obj file containing def
762 STB_GLOBAL = 1, // Global symbol, visible to all object files being combined
763 STB_WEAK = 2, // Weak symbol, like global but lower-precedence
764 STB_LOOS = 10, // Lowest operating system-specific binding type
765 STB_HIOS = 12, // Highest operating system-specific binding type
766 STB_LOPROC = 13, // Lowest processor-specific binding type
767 STB_HIPROC = 15 // Highest processor-specific binding type
768 };
769
770 // Symbol types.
771 enum {
772 STT_NOTYPE = 0, // Symbol's type is not specified
773 STT_OBJECT = 1, // Symbol is a data object (variable, array, etc.)
774 STT_FUNC = 2, // Symbol is executable code (function, etc.)
775 STT_SECTION = 3, // Symbol refers to a section
776 STT_FILE = 4, // Local, absolute symbol that refers to a file
777 STT_COMMON = 5, // An uninitialized common block
778 STT_TLS = 6, // Thread local data object
779 STT_LOOS = 7, // Lowest operating system-specific symbol type
780 STT_HIOS = 8, // Highest operating system-specific symbol type
781 STT_GNU_IFUNC = 10, // GNU indirect function
782 STT_LOPROC = 13, // Lowest processor-specific symbol type
783 STT_HIPROC = 15 // Highest processor-specific symbol type
784 };
785
786 enum {
787 STV_DEFAULT = 0, // Visibility is specified by binding type
788 STV_INTERNAL = 1, // Defined by processor supplements
789 STV_HIDDEN = 2, // Not visible to other components
790 STV_PROTECTED = 3 // Visible in other components but not preemptable
791 };
792
793 // Symbol number.
794 enum {
795 STN_UNDEF = 0
796 };
797
798 // Relocation entry, without explicit addend.
799 struct Elf32_Rel {
800 Elf32_Addr r_offset; // Location (file byte offset, or program virtual addr)
801 Elf32_Word r_info; // Symbol table index and type of relocation to apply
802
803 // These accessors and mutators correspond to the ELF32_R_SYM, ELF32_R_TYPE,
804 // and ELF32_R_INFO macros defined in the ELF specification:
getSymbolElf32_Rel805 Elf32_Word getSymbol() const { return (r_info >> 8); }
getTypeElf32_Rel806 unsigned char getType() const { return (unsigned char) (r_info & 0x0ff); }
setSymbolElf32_Rel807 void setSymbol(Elf32_Word s) { setSymbolAndType(s, getType()); }
setTypeElf32_Rel808 void setType(unsigned char t) { setSymbolAndType(getSymbol(), t); }
setSymbolAndTypeElf32_Rel809 void setSymbolAndType(Elf32_Word s, unsigned char t) {
810 r_info = (s << 8) + t;
811 }
812 };
813
814 // Relocation entry with explicit addend.
815 struct Elf32_Rela {
816 Elf32_Addr r_offset; // Location (file byte offset, or program virtual addr)
817 Elf32_Word r_info; // Symbol table index and type of relocation to apply
818 Elf32_Sword r_addend; // Compute value for relocatable field by adding this
819
820 // These accessors and mutators correspond to the ELF32_R_SYM, ELF32_R_TYPE,
821 // and ELF32_R_INFO macros defined in the ELF specification:
getSymbolElf32_Rela822 Elf32_Word getSymbol() const { return (r_info >> 8); }
getTypeElf32_Rela823 unsigned char getType() const { return (unsigned char) (r_info & 0x0ff); }
setSymbolElf32_Rela824 void setSymbol(Elf32_Word s) { setSymbolAndType(s, getType()); }
setTypeElf32_Rela825 void setType(unsigned char t) { setSymbolAndType(getSymbol(), t); }
setSymbolAndTypeElf32_Rela826 void setSymbolAndType(Elf32_Word s, unsigned char t) {
827 r_info = (s << 8) + t;
828 }
829 };
830
831 // Relocation entry, without explicit addend.
832 struct Elf64_Rel {
833 Elf64_Addr r_offset; // Location (file byte offset, or program virtual addr).
834 Elf64_Xword r_info; // Symbol table index and type of relocation to apply.
835
836 // These accessors and mutators correspond to the ELF64_R_SYM, ELF64_R_TYPE,
837 // and ELF64_R_INFO macros defined in the ELF specification:
getSymbolElf64_Rel838 Elf64_Word getSymbol() const { return (r_info >> 32); }
getTypeElf64_Rel839 Elf64_Word getType() const {
840 return (Elf64_Word) (r_info & 0xffffffffL);
841 }
setSymbolElf64_Rel842 void setSymbol(Elf64_Word s) { setSymbolAndType(s, getType()); }
setTypeElf64_Rel843 void setType(Elf64_Word t) { setSymbolAndType(getSymbol(), t); }
setSymbolAndTypeElf64_Rel844 void setSymbolAndType(Elf64_Word s, Elf64_Word t) {
845 r_info = ((Elf64_Xword)s << 32) + (t&0xffffffffL);
846 }
847 };
848
849 // Relocation entry with explicit addend.
850 struct Elf64_Rela {
851 Elf64_Addr r_offset; // Location (file byte offset, or program virtual addr).
852 Elf64_Xword r_info; // Symbol table index and type of relocation to apply.
853 Elf64_Sxword r_addend; // Compute value for relocatable field by adding this.
854
855 // These accessors and mutators correspond to the ELF64_R_SYM, ELF64_R_TYPE,
856 // and ELF64_R_INFO macros defined in the ELF specification:
getSymbolElf64_Rela857 Elf64_Word getSymbol() const { return (r_info >> 32); }
getTypeElf64_Rela858 Elf64_Word getType() const {
859 return (Elf64_Word) (r_info & 0xffffffffL);
860 }
setSymbolElf64_Rela861 void setSymbol(Elf64_Word s) { setSymbolAndType(s, getType()); }
setTypeElf64_Rela862 void setType(Elf64_Word t) { setSymbolAndType(getSymbol(), t); }
setSymbolAndTypeElf64_Rela863 void setSymbolAndType(Elf64_Word s, Elf64_Word t) {
864 r_info = ((Elf64_Xword)s << 32) + (t&0xffffffffL);
865 }
866 };
867
868 // Program header for ELF32.
869 struct Elf32_Phdr {
870 Elf32_Word p_type; // Type of segment
871 Elf32_Off p_offset; // File offset where segment is located, in bytes
872 Elf32_Addr p_vaddr; // Virtual address of beginning of segment
873 Elf32_Addr p_paddr; // Physical address of beginning of segment (OS-specific)
874 Elf32_Word p_filesz; // Num. of bytes in file image of segment (may be zero)
875 Elf32_Word p_memsz; // Num. of bytes in mem image of segment (may be zero)
876 Elf32_Word p_flags; // Segment flags
877 Elf32_Word p_align; // Segment alignment constraint
878 };
879
880 // Program header for ELF64.
881 struct Elf64_Phdr {
882 Elf64_Word p_type; // Type of segment
883 Elf64_Word p_flags; // Segment flags
884 Elf64_Off p_offset; // File offset where segment is located, in bytes
885 Elf64_Addr p_vaddr; // Virtual address of beginning of segment
886 Elf64_Addr p_paddr; // Physical addr of beginning of segment (OS-specific)
887 Elf64_Xword p_filesz; // Num. of bytes in file image of segment (may be zero)
888 Elf64_Xword p_memsz; // Num. of bytes in mem image of segment (may be zero)
889 Elf64_Xword p_align; // Segment alignment constraint
890 };
891
892 // Segment types.
893 enum {
894 PT_NULL = 0, // Unused segment.
895 PT_LOAD = 1, // Loadable segment.
896 PT_DYNAMIC = 2, // Dynamic linking information.
897 PT_INTERP = 3, // Interpreter pathname.
898 PT_NOTE = 4, // Auxiliary information.
899 PT_SHLIB = 5, // Reserved.
900 PT_PHDR = 6, // The program header table itself.
901 PT_TLS = 7, // The thread-local storage template.
902 PT_LOOS = 0x60000000, // Lowest operating system-specific pt entry type.
903 PT_HIOS = 0x6fffffff, // Highest operating system-specific pt entry type.
904 PT_LOPROC = 0x70000000, // Lowest processor-specific program hdr entry type.
905 PT_HIPROC = 0x7fffffff, // Highest processor-specific program hdr entry type.
906
907 // x86-64 program header types.
908 // These all contain stack unwind tables.
909 PT_GNU_EH_FRAME = 0x6474e550,
910 PT_SUNW_EH_FRAME = 0x6474e550,
911 PT_SUNW_UNWIND = 0x6464e550,
912
913 PT_GNU_STACK = 0x6474e551, // Indicates stack executability.
914 PT_GNU_RELRO = 0x6474e552, // Read-only after relocation.
915
916 // ARM program header types.
917 PT_ARM_ARCHEXT = 0x70000000, // Platform architecture compatibility info
918 // These all contain stack unwind tables.
919 PT_ARM_EXIDX = 0x70000001,
920 PT_ARM_UNWIND = 0x70000001,
921
922 // MIPS program header types.
923 PT_MIPS_REGINFO = 0x70000000, // Register usage information.
924 PT_MIPS_RTPROC = 0x70000001, // Runtime procedure table.
925 PT_MIPS_OPTIONS = 0x70000002, // Options segment.
926 PT_MIPS_ABIFLAGS = 0x70000003 // Abiflags segment.
927 };
928
929 // Segment flag bits.
930 enum : unsigned {
931 PF_X = 1, // Execute
932 PF_W = 2, // Write
933 PF_R = 4, // Read
934 PF_MASKOS = 0x0ff00000,// Bits for operating system-specific semantics.
935 PF_MASKPROC = 0xf0000000 // Bits for processor-specific semantics.
936 };
937
938 // Dynamic table entry for ELF32.
939 struct Elf32_Dyn
940 {
941 Elf32_Sword d_tag; // Type of dynamic table entry.
942 union
943 {
944 Elf32_Word d_val; // Integer value of entry.
945 Elf32_Addr d_ptr; // Pointer value of entry.
946 } d_un;
947 };
948
949 // Dynamic table entry for ELF64.
950 struct Elf64_Dyn
951 {
952 Elf64_Sxword d_tag; // Type of dynamic table entry.
953 union
954 {
955 Elf64_Xword d_val; // Integer value of entry.
956 Elf64_Addr d_ptr; // Pointer value of entry.
957 } d_un;
958 };
959
960 // Dynamic table entry tags.
961 enum {
962 DT_NULL = 0, // Marks end of dynamic array.
963 DT_NEEDED = 1, // String table offset of needed library.
964 DT_PLTRELSZ = 2, // Size of relocation entries in PLT.
965 DT_PLTGOT = 3, // Address associated with linkage table.
966 DT_HASH = 4, // Address of symbolic hash table.
967 DT_STRTAB = 5, // Address of dynamic string table.
968 DT_SYMTAB = 6, // Address of dynamic symbol table.
969 DT_RELA = 7, // Address of relocation table (Rela entries).
970 DT_RELASZ = 8, // Size of Rela relocation table.
971 DT_RELAENT = 9, // Size of a Rela relocation entry.
972 DT_STRSZ = 10, // Total size of the string table.
973 DT_SYMENT = 11, // Size of a symbol table entry.
974 DT_INIT = 12, // Address of initialization function.
975 DT_FINI = 13, // Address of termination function.
976 DT_SONAME = 14, // String table offset of a shared objects name.
977 DT_RPATH = 15, // String table offset of library search path.
978 DT_SYMBOLIC = 16, // Changes symbol resolution algorithm.
979 DT_REL = 17, // Address of relocation table (Rel entries).
980 DT_RELSZ = 18, // Size of Rel relocation table.
981 DT_RELENT = 19, // Size of a Rel relocation entry.
982 DT_PLTREL = 20, // Type of relocation entry used for linking.
983 DT_DEBUG = 21, // Reserved for debugger.
984 DT_TEXTREL = 22, // Relocations exist for non-writable segments.
985 DT_JMPREL = 23, // Address of relocations associated with PLT.
986 DT_BIND_NOW = 24, // Process all relocations before execution.
987 DT_INIT_ARRAY = 25, // Pointer to array of initialization functions.
988 DT_FINI_ARRAY = 26, // Pointer to array of termination functions.
989 DT_INIT_ARRAYSZ = 27, // Size of DT_INIT_ARRAY.
990 DT_FINI_ARRAYSZ = 28, // Size of DT_FINI_ARRAY.
991 DT_RUNPATH = 29, // String table offset of lib search path.
992 DT_FLAGS = 30, // Flags.
993 DT_ENCODING = 32, // Values from here to DT_LOOS follow the rules
994 // for the interpretation of the d_un union.
995
996 DT_PREINIT_ARRAY = 32, // Pointer to array of preinit functions.
997 DT_PREINIT_ARRAYSZ = 33, // Size of the DT_PREINIT_ARRAY array.
998
999 DT_LOOS = 0x60000000, // Start of environment specific tags.
1000 DT_HIOS = 0x6FFFFFFF, // End of environment specific tags.
1001 DT_LOPROC = 0x70000000, // Start of processor specific tags.
1002 DT_HIPROC = 0x7FFFFFFF, // End of processor specific tags.
1003
1004 DT_GNU_HASH = 0x6FFFFEF5, // Reference to the GNU hash table.
1005 DT_RELACOUNT = 0x6FFFFFF9, // ELF32_Rela count.
1006 DT_RELCOUNT = 0x6FFFFFFA, // ELF32_Rel count.
1007
1008 DT_FLAGS_1 = 0X6FFFFFFB, // Flags_1.
1009 DT_VERSYM = 0x6FFFFFF0, // The address of .gnu.version section.
1010 DT_VERDEF = 0X6FFFFFFC, // The address of the version definition table.
1011 DT_VERDEFNUM = 0X6FFFFFFD, // The number of entries in DT_VERDEF.
1012 DT_VERNEED = 0X6FFFFFFE, // The address of the version Dependency table.
1013 DT_VERNEEDNUM = 0X6FFFFFFF, // The number of entries in DT_VERNEED.
1014
1015 // Mips specific dynamic table entry tags.
1016 DT_MIPS_RLD_VERSION = 0x70000001, // 32 bit version number for runtime
1017 // linker interface.
1018 DT_MIPS_TIME_STAMP = 0x70000002, // Time stamp.
1019 DT_MIPS_ICHECKSUM = 0x70000003, // Checksum of external strings
1020 // and common sizes.
1021 DT_MIPS_IVERSION = 0x70000004, // Index of version string
1022 // in string table.
1023 DT_MIPS_FLAGS = 0x70000005, // 32 bits of flags.
1024 DT_MIPS_BASE_ADDRESS = 0x70000006, // Base address of the segment.
1025 DT_MIPS_MSYM = 0x70000007, // Address of .msym section.
1026 DT_MIPS_CONFLICT = 0x70000008, // Address of .conflict section.
1027 DT_MIPS_LIBLIST = 0x70000009, // Address of .liblist section.
1028 DT_MIPS_LOCAL_GOTNO = 0x7000000a, // Number of local global offset
1029 // table entries.
1030 DT_MIPS_CONFLICTNO = 0x7000000b, // Number of entries
1031 // in the .conflict section.
1032 DT_MIPS_LIBLISTNO = 0x70000010, // Number of entries
1033 // in the .liblist section.
1034 DT_MIPS_SYMTABNO = 0x70000011, // Number of entries
1035 // in the .dynsym section.
1036 DT_MIPS_UNREFEXTNO = 0x70000012, // Index of first external dynamic symbol
1037 // not referenced locally.
1038 DT_MIPS_GOTSYM = 0x70000013, // Index of first dynamic symbol
1039 // in global offset table.
1040 DT_MIPS_HIPAGENO = 0x70000014, // Number of page table entries
1041 // in global offset table.
1042 DT_MIPS_RLD_MAP = 0x70000016, // Address of run time loader map,
1043 // used for debugging.
1044 DT_MIPS_DELTA_CLASS = 0x70000017, // Delta C++ class definition.
1045 DT_MIPS_DELTA_CLASS_NO = 0x70000018, // Number of entries
1046 // in DT_MIPS_DELTA_CLASS.
1047 DT_MIPS_DELTA_INSTANCE = 0x70000019, // Delta C++ class instances.
1048 DT_MIPS_DELTA_INSTANCE_NO = 0x7000001A, // Number of entries
1049 // in DT_MIPS_DELTA_INSTANCE.
1050 DT_MIPS_DELTA_RELOC = 0x7000001B, // Delta relocations.
1051 DT_MIPS_DELTA_RELOC_NO = 0x7000001C, // Number of entries
1052 // in DT_MIPS_DELTA_RELOC.
1053 DT_MIPS_DELTA_SYM = 0x7000001D, // Delta symbols that Delta
1054 // relocations refer to.
1055 DT_MIPS_DELTA_SYM_NO = 0x7000001E, // Number of entries
1056 // in DT_MIPS_DELTA_SYM.
1057 DT_MIPS_DELTA_CLASSSYM = 0x70000020, // Delta symbols that hold
1058 // class declarations.
1059 DT_MIPS_DELTA_CLASSSYM_NO = 0x70000021, // Number of entries
1060 // in DT_MIPS_DELTA_CLASSSYM.
1061 DT_MIPS_CXX_FLAGS = 0x70000022, // Flags indicating information
1062 // about C++ flavor.
1063 DT_MIPS_PIXIE_INIT = 0x70000023, // Pixie information.
1064 DT_MIPS_SYMBOL_LIB = 0x70000024, // Address of .MIPS.symlib
1065 DT_MIPS_LOCALPAGE_GOTIDX = 0x70000025, // The GOT index of the first PTE
1066 // for a segment
1067 DT_MIPS_LOCAL_GOTIDX = 0x70000026, // The GOT index of the first PTE
1068 // for a local symbol
1069 DT_MIPS_HIDDEN_GOTIDX = 0x70000027, // The GOT index of the first PTE
1070 // for a hidden symbol
1071 DT_MIPS_PROTECTED_GOTIDX = 0x70000028, // The GOT index of the first PTE
1072 // for a protected symbol
1073 DT_MIPS_OPTIONS = 0x70000029, // Address of `.MIPS.options'.
1074 DT_MIPS_INTERFACE = 0x7000002A, // Address of `.interface'.
1075 DT_MIPS_DYNSTR_ALIGN = 0x7000002B, // Unknown.
1076 DT_MIPS_INTERFACE_SIZE = 0x7000002C, // Size of the .interface section.
1077 DT_MIPS_RLD_TEXT_RESOLVE_ADDR = 0x7000002D, // Size of rld_text_resolve
1078 // function stored in the GOT.
1079 DT_MIPS_PERF_SUFFIX = 0x7000002E, // Default suffix of DSO to be added
1080 // by rld on dlopen() calls.
1081 DT_MIPS_COMPACT_SIZE = 0x7000002F, // Size of compact relocation
1082 // section (O32).
1083 DT_MIPS_GP_VALUE = 0x70000030, // GP value for auxiliary GOTs.
1084 DT_MIPS_AUX_DYNAMIC = 0x70000031, // Address of auxiliary .dynamic.
1085 DT_MIPS_PLTGOT = 0x70000032, // Address of the base of the PLTGOT.
1086 DT_MIPS_RWPLT = 0x70000034 // Points to the base
1087 // of a writable PLT.
1088 };
1089
1090 // DT_FLAGS values.
1091 enum {
1092 DF_ORIGIN = 0x01, // The object may reference $ORIGIN.
1093 DF_SYMBOLIC = 0x02, // Search the shared lib before searching the exe.
1094 DF_TEXTREL = 0x04, // Relocations may modify a non-writable segment.
1095 DF_BIND_NOW = 0x08, // Process all relocations on load.
1096 DF_STATIC_TLS = 0x10 // Reject attempts to load dynamically.
1097 };
1098
1099 // State flags selectable in the `d_un.d_val' element of the DT_FLAGS_1 entry.
1100 enum {
1101 DF_1_NOW = 0x00000001, // Set RTLD_NOW for this object.
1102 DF_1_GLOBAL = 0x00000002, // Set RTLD_GLOBAL for this object.
1103 DF_1_GROUP = 0x00000004, // Set RTLD_GROUP for this object.
1104 DF_1_NODELETE = 0x00000008, // Set RTLD_NODELETE for this object.
1105 DF_1_LOADFLTR = 0x00000010, // Trigger filtee loading at runtime.
1106 DF_1_INITFIRST = 0x00000020, // Set RTLD_INITFIRST for this object.
1107 DF_1_NOOPEN = 0x00000040, // Set RTLD_NOOPEN for this object.
1108 DF_1_ORIGIN = 0x00000080, // $ORIGIN must be handled.
1109 DF_1_DIRECT = 0x00000100, // Direct binding enabled.
1110 DF_1_TRANS = 0x00000200,
1111 DF_1_INTERPOSE = 0x00000400, // Object is used to interpose.
1112 DF_1_NODEFLIB = 0x00000800, // Ignore default lib search path.
1113 DF_1_NODUMP = 0x00001000, // Object can't be dldump'ed.
1114 DF_1_CONFALT = 0x00002000, // Configuration alternative created.
1115 DF_1_ENDFILTEE = 0x00004000, // Filtee terminates filters search.
1116 DF_1_DISPRELDNE = 0x00008000, // Disp reloc applied at build time.
1117 DF_1_DISPRELPND = 0x00010000 // Disp reloc applied at run-time.
1118 };
1119
1120 // DT_MIPS_FLAGS values.
1121 enum {
1122 RHF_NONE = 0x00000000, // No flags.
1123 RHF_QUICKSTART = 0x00000001, // Uses shortcut pointers.
1124 RHF_NOTPOT = 0x00000002, // Hash size is not a power of two.
1125 RHS_NO_LIBRARY_REPLACEMENT = 0x00000004, // Ignore LD_LIBRARY_PATH.
1126 RHF_NO_MOVE = 0x00000008, // DSO address may not be relocated.
1127 RHF_SGI_ONLY = 0x00000010, // SGI specific features.
1128 RHF_GUARANTEE_INIT = 0x00000020, // Guarantee that .init will finish
1129 // executing before any non-init
1130 // code in DSO is called.
1131 RHF_DELTA_C_PLUS_PLUS = 0x00000040, // Contains Delta C++ code.
1132 RHF_GUARANTEE_START_INIT = 0x00000080, // Guarantee that .init will start
1133 // executing before any non-init
1134 // code in DSO is called.
1135 RHF_PIXIE = 0x00000100, // Generated by pixie.
1136 RHF_DEFAULT_DELAY_LOAD = 0x00000200, // Delay-load DSO by default.
1137 RHF_REQUICKSTART = 0x00000400, // Object may be requickstarted
1138 RHF_REQUICKSTARTED = 0x00000800, // Object has been requickstarted
1139 RHF_CORD = 0x00001000, // Generated by cord.
1140 RHF_NO_UNRES_UNDEF = 0x00002000, // Object contains no unresolved
1141 // undef symbols.
1142 RHF_RLD_ORDER_SAFE = 0x00004000 // Symbol table is in a safe order.
1143 };
1144
1145 // ElfXX_VerDef structure version (GNU versioning)
1146 enum {
1147 VER_DEF_NONE = 0,
1148 VER_DEF_CURRENT = 1
1149 };
1150
1151 // VerDef Flags (ElfXX_VerDef::vd_flags)
1152 enum {
1153 VER_FLG_BASE = 0x1,
1154 VER_FLG_WEAK = 0x2,
1155 VER_FLG_INFO = 0x4
1156 };
1157
1158 // Special constants for the version table. (SHT_GNU_versym/.gnu.version)
1159 enum {
1160 VER_NDX_LOCAL = 0, // Unversioned local symbol
1161 VER_NDX_GLOBAL = 1, // Unversioned global symbol
1162 VERSYM_VERSION = 0x7fff, // Version Index mask
1163 VERSYM_HIDDEN = 0x8000 // Hidden bit (non-default version)
1164 };
1165
1166 // ElfXX_VerNeed structure version (GNU versioning)
1167 enum {
1168 VER_NEED_NONE = 0,
1169 VER_NEED_CURRENT = 1
1170 };
1171
1172 } // end namespace ELF
1173
1174 } // end namespace llvm
1175
1176 #endif
1177