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_IAMCU = 6, // Intel MCU
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 EM_AMDGPU = 224 // AMD GPU architecture
313 };
314
315 // Object file classes.
316 enum {
317 ELFCLASSNONE = 0,
318 ELFCLASS32 = 1, // 32-bit object file
319 ELFCLASS64 = 2 // 64-bit object file
320 };
321
322 // Object file byte orderings.
323 enum {
324 ELFDATANONE = 0, // Invalid data encoding.
325 ELFDATA2LSB = 1, // Little-endian object file
326 ELFDATA2MSB = 2 // Big-endian object file
327 };
328
329 // OS ABI identification.
330 enum {
331 ELFOSABI_NONE = 0, // UNIX System V ABI
332 ELFOSABI_HPUX = 1, // HP-UX operating system
333 ELFOSABI_NETBSD = 2, // NetBSD
334 ELFOSABI_GNU = 3, // GNU/Linux
335 ELFOSABI_LINUX = 3, // Historical alias for ELFOSABI_GNU.
336 ELFOSABI_HURD = 4, // GNU/Hurd
337 ELFOSABI_SOLARIS = 6, // Solaris
338 ELFOSABI_AIX = 7, // AIX
339 ELFOSABI_IRIX = 8, // IRIX
340 ELFOSABI_FREEBSD = 9, // FreeBSD
341 ELFOSABI_TRU64 = 10, // TRU64 UNIX
342 ELFOSABI_MODESTO = 11, // Novell Modesto
343 ELFOSABI_OPENBSD = 12, // OpenBSD
344 ELFOSABI_OPENVMS = 13, // OpenVMS
345 ELFOSABI_NSK = 14, // Hewlett-Packard Non-Stop Kernel
346 ELFOSABI_AROS = 15, // AROS
347 ELFOSABI_FENIXOS = 16, // FenixOS
348 ELFOSABI_CLOUDABI = 17, // Nuxi CloudABI
349 ELFOSABI_C6000_ELFABI = 64, // Bare-metal TMS320C6000
350 ELFOSABI_AMDGPU_HSA = 64, // AMD HSA runtime
351 ELFOSABI_C6000_LINUX = 65, // Linux TMS320C6000
352 ELFOSABI_ARM = 97, // ARM
353 ELFOSABI_STANDALONE = 255 // Standalone (embedded) application
354 };
355
356 #define ELF_RELOC(name, value) name = value,
357
358 // X86_64 relocations.
359 enum {
360 #include "ELFRelocs/x86_64.def"
361 };
362
363 // i386 relocations.
364 enum {
365 #include "ELFRelocs/i386.def"
366 };
367
368 // ELF Relocation types for PPC32
369 enum {
370 #include "ELFRelocs/PowerPC.def"
371 };
372
373 // Specific e_flags for PPC64
374 enum {
375 // e_flags bits specifying ABI:
376 // 1 for original ABI using function descriptors,
377 // 2 for revised ABI without function descriptors,
378 // 0 for unspecified or not using any features affected by the differences.
379 EF_PPC64_ABI = 3
380 };
381
382 // Special values for the st_other field in the symbol table entry for PPC64.
383 enum {
384 STO_PPC64_LOCAL_BIT = 5,
385 STO_PPC64_LOCAL_MASK = (7 << STO_PPC64_LOCAL_BIT)
386 };
387 static inline int64_t
decodePPC64LocalEntryOffset(unsigned Other)388 decodePPC64LocalEntryOffset(unsigned Other) {
389 unsigned Val = (Other & STO_PPC64_LOCAL_MASK) >> STO_PPC64_LOCAL_BIT;
390 return ((1 << Val) >> 2) << 2;
391 }
392 static inline unsigned
encodePPC64LocalEntryOffset(int64_t Offset)393 encodePPC64LocalEntryOffset(int64_t Offset) {
394 unsigned Val = (Offset >= 4 * 4
395 ? (Offset >= 8 * 4
396 ? (Offset >= 16 * 4 ? 6 : 5)
397 : 4)
398 : (Offset >= 2 * 4
399 ? 3
400 : (Offset >= 1 * 4 ? 2 : 0)));
401 return Val << STO_PPC64_LOCAL_BIT;
402 }
403
404 // ELF Relocation types for PPC64
405 enum {
406 #include "ELFRelocs/PowerPC64.def"
407 };
408
409 // ELF Relocation types for AArch64
410 enum {
411 #include "ELFRelocs/AArch64.def"
412 };
413
414 // ARM Specific e_flags
415 enum : unsigned {
416 EF_ARM_SOFT_FLOAT = 0x00000200U,
417 EF_ARM_VFP_FLOAT = 0x00000400U,
418 EF_ARM_EABI_UNKNOWN = 0x00000000U,
419 EF_ARM_EABI_VER1 = 0x01000000U,
420 EF_ARM_EABI_VER2 = 0x02000000U,
421 EF_ARM_EABI_VER3 = 0x03000000U,
422 EF_ARM_EABI_VER4 = 0x04000000U,
423 EF_ARM_EABI_VER5 = 0x05000000U,
424 EF_ARM_EABIMASK = 0xFF000000U
425 };
426
427 // ELF Relocation types for ARM
428 enum {
429 #include "ELFRelocs/ARM.def"
430 };
431
432 // AVR specific e_flags
433 enum : unsigned {
434 EF_AVR_ARCH_AVR1 = 1,
435 EF_AVR_ARCH_AVR2 = 2,
436 EF_AVR_ARCH_AVR25 = 25,
437 EF_AVR_ARCH_AVR3 = 3,
438 EF_AVR_ARCH_AVR31 = 31,
439 EF_AVR_ARCH_AVR35 = 35,
440 EF_AVR_ARCH_AVR4 = 4,
441 EF_AVR_ARCH_AVR5 = 5,
442 EF_AVR_ARCH_AVR51 = 51,
443 EF_AVR_ARCH_AVR6 = 6,
444 EF_AVR_ARCH_AVRTINY = 100,
445 EF_AVR_ARCH_XMEGA1 = 101,
446 EF_AVR_ARCH_XMEGA2 = 102,
447 EF_AVR_ARCH_XMEGA3 = 103,
448 EF_AVR_ARCH_XMEGA4 = 104,
449 EF_AVR_ARCH_XMEGA5 = 105,
450 EF_AVR_ARCH_XMEGA6 = 106,
451 EF_AVR_ARCH_XMEGA7 = 107
452 };
453
454 // ELF Relocation types for AVR
455 enum {
456 #include "ELFRelocs/AVR.def"
457 };
458
459 // Mips Specific e_flags
460 enum : unsigned {
461 EF_MIPS_NOREORDER = 0x00000001, // Don't reorder instructions
462 EF_MIPS_PIC = 0x00000002, // Position independent code
463 EF_MIPS_CPIC = 0x00000004, // Call object with Position independent code
464 EF_MIPS_ABI2 = 0x00000020, // File uses N32 ABI
465 EF_MIPS_32BITMODE = 0x00000100, // Code compiled for a 64-bit machine
466 // in 32-bit mode
467 EF_MIPS_FP64 = 0x00000200, // Code compiled for a 32-bit machine
468 // but uses 64-bit FP registers
469 EF_MIPS_NAN2008 = 0x00000400, // Uses IEE 754-2008 NaN encoding
470
471 // ABI flags
472 EF_MIPS_ABI_O32 = 0x00001000, // This file follows the first MIPS 32 bit ABI
473 EF_MIPS_ABI_O64 = 0x00002000, // O32 ABI extended for 64-bit architecture.
474 EF_MIPS_ABI_EABI32 = 0x00003000, // EABI in 32 bit mode.
475 EF_MIPS_ABI_EABI64 = 0x00004000, // EABI in 64 bit mode.
476 EF_MIPS_ABI = 0x0000f000, // Mask for selecting EF_MIPS_ABI_ variant.
477
478 // MIPS machine variant
479 EF_MIPS_MACH_3900 = 0x00810000, // Toshiba R3900
480 EF_MIPS_MACH_4010 = 0x00820000, // LSI R4010
481 EF_MIPS_MACH_4100 = 0x00830000, // NEC VR4100
482 EF_MIPS_MACH_4650 = 0x00850000, // MIPS R4650
483 EF_MIPS_MACH_4120 = 0x00870000, // NEC VR4120
484 EF_MIPS_MACH_4111 = 0x00880000, // NEC VR4111/VR4181
485 EF_MIPS_MACH_SB1 = 0x008a0000, // Broadcom SB-1
486 EF_MIPS_MACH_OCTEON = 0x008b0000, // Cavium Networks Octeon
487 EF_MIPS_MACH_XLR = 0x008c0000, // RMI Xlr
488 EF_MIPS_MACH_OCTEON2 = 0x008d0000, // Cavium Networks Octeon2
489 EF_MIPS_MACH_OCTEON3 = 0x008e0000, // Cavium Networks Octeon3
490 EF_MIPS_MACH_5400 = 0x00910000, // NEC VR5400
491 EF_MIPS_MACH_5900 = 0x00920000, // MIPS R5900
492 EF_MIPS_MACH_5500 = 0x00980000, // NEC VR5500
493 EF_MIPS_MACH_9000 = 0x00990000, // Unknown
494 EF_MIPS_MACH_LS2E = 0x00a00000, // ST Microelectronics Loongson 2E
495 EF_MIPS_MACH_LS2F = 0x00a10000, // ST Microelectronics Loongson 2F
496 EF_MIPS_MACH_LS3A = 0x00a20000, // Loongson 3A
497 EF_MIPS_MACH = 0x00ff0000, // EF_MIPS_MACH_xxx selection mask
498
499 // ARCH_ASE
500 EF_MIPS_MICROMIPS = 0x02000000, // microMIPS
501 EF_MIPS_ARCH_ASE_M16 =
502 0x04000000, // Has Mips-16 ISA extensions
503 EF_MIPS_ARCH_ASE_MDMX =
504 0x08000000, // Has MDMX multimedia extensions
505 EF_MIPS_ARCH_ASE = 0x0f000000, // Mask for EF_MIPS_ARCH_ASE_xxx flags
506
507 // ARCH
508 EF_MIPS_ARCH_1 = 0x00000000, // MIPS1 instruction set
509 EF_MIPS_ARCH_2 = 0x10000000, // MIPS2 instruction set
510 EF_MIPS_ARCH_3 = 0x20000000, // MIPS3 instruction set
511 EF_MIPS_ARCH_4 = 0x30000000, // MIPS4 instruction set
512 EF_MIPS_ARCH_5 = 0x40000000, // MIPS5 instruction set
513 EF_MIPS_ARCH_32 = 0x50000000, // MIPS32 instruction set per linux not elf.h
514 EF_MIPS_ARCH_64 = 0x60000000, // MIPS64 instruction set per linux not elf.h
515 EF_MIPS_ARCH_32R2 = 0x70000000, // mips32r2, mips32r3, mips32r5
516 EF_MIPS_ARCH_64R2 = 0x80000000, // mips64r2, mips64r3, mips64r5
517 EF_MIPS_ARCH_32R6 = 0x90000000, // mips32r6
518 EF_MIPS_ARCH_64R6 = 0xa0000000, // mips64r6
519 EF_MIPS_ARCH = 0xf0000000 // Mask for applying EF_MIPS_ARCH_ variant
520 };
521
522 // ELF Relocation types for Mips
523 enum {
524 #include "ELFRelocs/Mips.def"
525 };
526
527 // Special values for the st_other field in the symbol table entry for MIPS.
528 enum {
529 STO_MIPS_OPTIONAL = 0x04, // Symbol whose definition is optional
530 STO_MIPS_PLT = 0x08, // PLT entry related dynamic table record
531 STO_MIPS_PIC = 0x20, // PIC func in an object mixes PIC/non-PIC
532 STO_MIPS_MICROMIPS = 0x80, // MIPS Specific ISA for MicroMips
533 STO_MIPS_MIPS16 = 0xf0 // MIPS Specific ISA for Mips16
534 };
535
536 // .MIPS.options section descriptor kinds
537 enum {
538 ODK_NULL = 0, // Undefined
539 ODK_REGINFO = 1, // Register usage information
540 ODK_EXCEPTIONS = 2, // Exception processing options
541 ODK_PAD = 3, // Section padding options
542 ODK_HWPATCH = 4, // Hardware patches applied
543 ODK_FILL = 5, // Linker fill value
544 ODK_TAGS = 6, // Space for tool identification
545 ODK_HWAND = 7, // Hardware AND patches applied
546 ODK_HWOR = 8, // Hardware OR patches applied
547 ODK_GP_GROUP = 9, // GP group to use for text/data sections
548 ODK_IDENT = 10, // ID information
549 ODK_PAGESIZE = 11 // Page size information
550 };
551
552 // Hexagon-specific e_flags
553 enum {
554 // Object processor version flags, bits[11:0]
555 EF_HEXAGON_MACH_V2 = 0x00000001, // Hexagon V2
556 EF_HEXAGON_MACH_V3 = 0x00000002, // Hexagon V3
557 EF_HEXAGON_MACH_V4 = 0x00000003, // Hexagon V4
558 EF_HEXAGON_MACH_V5 = 0x00000004, // Hexagon V5
559 EF_HEXAGON_MACH_V55 = 0x00000005, // Hexagon V55
560 EF_HEXAGON_MACH_V60 = 0x00000060, // Hexagon V60
561
562 // Highest ISA version flags
563 EF_HEXAGON_ISA_MACH = 0x00000000, // Same as specified in bits[11:0]
564 // of e_flags
565 EF_HEXAGON_ISA_V2 = 0x00000010, // Hexagon V2 ISA
566 EF_HEXAGON_ISA_V3 = 0x00000020, // Hexagon V3 ISA
567 EF_HEXAGON_ISA_V4 = 0x00000030, // Hexagon V4 ISA
568 EF_HEXAGON_ISA_V5 = 0x00000040, // Hexagon V5 ISA
569 EF_HEXAGON_ISA_V55 = 0x00000050, // Hexagon V55 ISA
570 EF_HEXAGON_ISA_V60 = 0x00000060, // Hexagon V60 ISA
571 };
572
573 // Hexagon-specific section indexes for common small data
574 enum {
575 SHN_HEXAGON_SCOMMON = 0xff00, // Other access sizes
576 SHN_HEXAGON_SCOMMON_1 = 0xff01, // Byte-sized access
577 SHN_HEXAGON_SCOMMON_2 = 0xff02, // Half-word-sized access
578 SHN_HEXAGON_SCOMMON_4 = 0xff03, // Word-sized access
579 SHN_HEXAGON_SCOMMON_8 = 0xff04 // Double-word-size access
580 };
581
582 // ELF Relocation types for Hexagon
583 enum {
584 #include "ELFRelocs/Hexagon.def"
585 };
586
587 // ELF Relocation types for S390/zSeries
588 enum {
589 #include "ELFRelocs/SystemZ.def"
590 };
591
592 // ELF Relocation type for Sparc.
593 enum {
594 #include "ELFRelocs/Sparc.def"
595 };
596
597 #undef ELF_RELOC
598
599 // Section header.
600 struct Elf32_Shdr {
601 Elf32_Word sh_name; // Section name (index into string table)
602 Elf32_Word sh_type; // Section type (SHT_*)
603 Elf32_Word sh_flags; // Section flags (SHF_*)
604 Elf32_Addr sh_addr; // Address where section is to be loaded
605 Elf32_Off sh_offset; // File offset of section data, in bytes
606 Elf32_Word sh_size; // Size of section, in bytes
607 Elf32_Word sh_link; // Section type-specific header table index link
608 Elf32_Word sh_info; // Section type-specific extra information
609 Elf32_Word sh_addralign; // Section address alignment
610 Elf32_Word sh_entsize; // Size of records contained within the section
611 };
612
613 // Section header for ELF64 - same fields as ELF32, different types.
614 struct Elf64_Shdr {
615 Elf64_Word sh_name;
616 Elf64_Word sh_type;
617 Elf64_Xword sh_flags;
618 Elf64_Addr sh_addr;
619 Elf64_Off sh_offset;
620 Elf64_Xword sh_size;
621 Elf64_Word sh_link;
622 Elf64_Word sh_info;
623 Elf64_Xword sh_addralign;
624 Elf64_Xword sh_entsize;
625 };
626
627 // Special section indices.
628 enum {
629 SHN_UNDEF = 0, // Undefined, missing, irrelevant, or meaningless
630 SHN_LORESERVE = 0xff00, // Lowest reserved index
631 SHN_LOPROC = 0xff00, // Lowest processor-specific index
632 SHN_HIPROC = 0xff1f, // Highest processor-specific index
633 SHN_LOOS = 0xff20, // Lowest operating system-specific index
634 SHN_HIOS = 0xff3f, // Highest operating system-specific index
635 SHN_ABS = 0xfff1, // Symbol has absolute value; does not need relocation
636 SHN_COMMON = 0xfff2, // FORTRAN COMMON or C external global variables
637 SHN_XINDEX = 0xffff, // Mark that the index is >= SHN_LORESERVE
638 SHN_HIRESERVE = 0xffff // Highest reserved index
639 };
640
641 // Section types.
642 enum : unsigned {
643 SHT_NULL = 0, // No associated section (inactive entry).
644 SHT_PROGBITS = 1, // Program-defined contents.
645 SHT_SYMTAB = 2, // Symbol table.
646 SHT_STRTAB = 3, // String table.
647 SHT_RELA = 4, // Relocation entries; explicit addends.
648 SHT_HASH = 5, // Symbol hash table.
649 SHT_DYNAMIC = 6, // Information for dynamic linking.
650 SHT_NOTE = 7, // Information about the file.
651 SHT_NOBITS = 8, // Data occupies no space in the file.
652 SHT_REL = 9, // Relocation entries; no explicit addends.
653 SHT_SHLIB = 10, // Reserved.
654 SHT_DYNSYM = 11, // Symbol table.
655 SHT_INIT_ARRAY = 14, // Pointers to initialization functions.
656 SHT_FINI_ARRAY = 15, // Pointers to termination functions.
657 SHT_PREINIT_ARRAY = 16, // Pointers to pre-init functions.
658 SHT_GROUP = 17, // Section group.
659 SHT_SYMTAB_SHNDX = 18, // Indices for SHN_XINDEX entries.
660 SHT_LOOS = 0x60000000, // Lowest operating system-specific type.
661 SHT_GNU_ATTRIBUTES= 0x6ffffff5, // Object attributes.
662 SHT_GNU_HASH = 0x6ffffff6, // GNU-style hash table.
663 SHT_GNU_verdef = 0x6ffffffd, // GNU version definitions.
664 SHT_GNU_verneed = 0x6ffffffe, // GNU version references.
665 SHT_GNU_versym = 0x6fffffff, // GNU symbol versions table.
666 SHT_HIOS = 0x6fffffff, // Highest operating system-specific type.
667 SHT_LOPROC = 0x70000000, // Lowest processor arch-specific type.
668 // Fixme: All this is duplicated in MCSectionELF. Why??
669 // Exception Index table
670 SHT_ARM_EXIDX = 0x70000001U,
671 // BPABI DLL dynamic linking pre-emption map
672 SHT_ARM_PREEMPTMAP = 0x70000002U,
673 // Object file compatibility attributes
674 SHT_ARM_ATTRIBUTES = 0x70000003U,
675 SHT_ARM_DEBUGOVERLAY = 0x70000004U,
676 SHT_ARM_OVERLAYSECTION = 0x70000005U,
677 SHT_HEX_ORDERED = 0x70000000, // Link editor is to sort the entries in
678 // this section based on their sizes
679 SHT_X86_64_UNWIND = 0x70000001, // Unwind information
680
681 SHT_MIPS_REGINFO = 0x70000006, // Register usage information
682 SHT_MIPS_OPTIONS = 0x7000000d, // General options
683 SHT_MIPS_ABIFLAGS = 0x7000002a, // ABI information.
684
685 SHT_HIPROC = 0x7fffffff, // Highest processor arch-specific type.
686 SHT_LOUSER = 0x80000000, // Lowest type reserved for applications.
687 SHT_HIUSER = 0xffffffff // Highest type reserved for applications.
688 };
689
690 // Section flags.
691 enum : unsigned {
692 // Section data should be writable during execution.
693 SHF_WRITE = 0x1,
694
695 // Section occupies memory during program execution.
696 SHF_ALLOC = 0x2,
697
698 // Section contains executable machine instructions.
699 SHF_EXECINSTR = 0x4,
700
701 // The data in this section may be merged.
702 SHF_MERGE = 0x10,
703
704 // The data in this section is null-terminated strings.
705 SHF_STRINGS = 0x20,
706
707 // A field in this section holds a section header table index.
708 SHF_INFO_LINK = 0x40U,
709
710 // Adds special ordering requirements for link editors.
711 SHF_LINK_ORDER = 0x80U,
712
713 // This section requires special OS-specific processing to avoid incorrect
714 // behavior.
715 SHF_OS_NONCONFORMING = 0x100U,
716
717 // This section is a member of a section group.
718 SHF_GROUP = 0x200U,
719
720 // This section holds Thread-Local Storage.
721 SHF_TLS = 0x400U,
722
723 // This section is excluded from the final executable or shared library.
724 SHF_EXCLUDE = 0x80000000U,
725
726 // Start of target-specific flags.
727
728 /// XCORE_SHF_CP_SECTION - All sections with the "c" flag are grouped
729 /// together by the linker to form the constant pool and the cp register is
730 /// set to the start of the constant pool by the boot code.
731 XCORE_SHF_CP_SECTION = 0x800U,
732
733 /// XCORE_SHF_DP_SECTION - All sections with the "d" flag are grouped
734 /// together by the linker to form the data section and the dp register is
735 /// set to the start of the section by the boot code.
736 XCORE_SHF_DP_SECTION = 0x1000U,
737
738 SHF_MASKOS = 0x0ff00000,
739
740 // Bits indicating processor-specific flags.
741 SHF_MASKPROC = 0xf0000000,
742
743 // If an object file section does not have this flag set, then it may not hold
744 // more than 2GB and can be freely referred to in objects using smaller code
745 // models. Otherwise, only objects using larger code models can refer to them.
746 // For example, a medium code model object can refer to data in a section that
747 // sets this flag besides being able to refer to data in a section that does
748 // not set it; likewise, a small code model object can refer only to code in a
749 // section that does not set this flag.
750 SHF_X86_64_LARGE = 0x10000000,
751
752 // All sections with the GPREL flag are grouped into a global data area
753 // for faster accesses
754 SHF_HEX_GPREL = 0x10000000,
755
756 // Section contains text/data which may be replicated in other sections.
757 // Linker must retain only one copy.
758 SHF_MIPS_NODUPES = 0x01000000,
759
760 // Linker must generate implicit hidden weak names.
761 SHF_MIPS_NAMES = 0x02000000,
762
763 // Section data local to process.
764 SHF_MIPS_LOCAL = 0x04000000,
765
766 // Do not strip this section.
767 SHF_MIPS_NOSTRIP = 0x08000000,
768
769 // Section must be part of global data area.
770 SHF_MIPS_GPREL = 0x10000000,
771
772 // This section should be merged.
773 SHF_MIPS_MERGE = 0x20000000,
774
775 // Address size to be inferred from section entry size.
776 SHF_MIPS_ADDR = 0x40000000,
777
778 // Section data is string data by default.
779 SHF_MIPS_STRING = 0x80000000,
780
781 SHF_AMDGPU_HSA_GLOBAL = 0x00100000,
782 SHF_AMDGPU_HSA_READONLY = 0x00200000,
783 SHF_AMDGPU_HSA_CODE = 0x00400000,
784 SHF_AMDGPU_HSA_AGENT = 0x00800000
785 };
786
787 // Section Group Flags
788 enum : unsigned {
789 GRP_COMDAT = 0x1,
790 GRP_MASKOS = 0x0ff00000,
791 GRP_MASKPROC = 0xf0000000
792 };
793
794 // Symbol table entries for ELF32.
795 struct Elf32_Sym {
796 Elf32_Word st_name; // Symbol name (index into string table)
797 Elf32_Addr st_value; // Value or address associated with the symbol
798 Elf32_Word st_size; // Size of the symbol
799 unsigned char st_info; // Symbol's type and binding attributes
800 unsigned char st_other; // Must be zero; reserved
801 Elf32_Half st_shndx; // Which section (header table index) it's defined in
802
803 // These accessors and mutators correspond to the ELF32_ST_BIND,
804 // ELF32_ST_TYPE, and ELF32_ST_INFO macros defined in the ELF specification:
getBindingElf32_Sym805 unsigned char getBinding() const { return st_info >> 4; }
getTypeElf32_Sym806 unsigned char getType() const { return st_info & 0x0f; }
setBindingElf32_Sym807 void setBinding(unsigned char b) { setBindingAndType(b, getType()); }
setTypeElf32_Sym808 void setType(unsigned char t) { setBindingAndType(getBinding(), t); }
setBindingAndTypeElf32_Sym809 void setBindingAndType(unsigned char b, unsigned char t) {
810 st_info = (b << 4) + (t & 0x0f);
811 }
812 };
813
814 // Symbol table entries for ELF64.
815 struct Elf64_Sym {
816 Elf64_Word st_name; // Symbol name (index into string table)
817 unsigned char st_info; // Symbol's type and binding attributes
818 unsigned char st_other; // Must be zero; reserved
819 Elf64_Half st_shndx; // Which section (header tbl index) it's defined in
820 Elf64_Addr st_value; // Value or address associated with the symbol
821 Elf64_Xword st_size; // Size of the symbol
822
823 // These accessors and mutators are identical to those defined for ELF32
824 // symbol table entries.
getBindingElf64_Sym825 unsigned char getBinding() const { return st_info >> 4; }
getTypeElf64_Sym826 unsigned char getType() const { return st_info & 0x0f; }
setBindingElf64_Sym827 void setBinding(unsigned char b) { setBindingAndType(b, getType()); }
setTypeElf64_Sym828 void setType(unsigned char t) { setBindingAndType(getBinding(), t); }
setBindingAndTypeElf64_Sym829 void setBindingAndType(unsigned char b, unsigned char t) {
830 st_info = (b << 4) + (t & 0x0f);
831 }
832 };
833
834 // The size (in bytes) of symbol table entries.
835 enum {
836 SYMENTRY_SIZE32 = 16, // 32-bit symbol entry size
837 SYMENTRY_SIZE64 = 24 // 64-bit symbol entry size.
838 };
839
840 // Symbol bindings.
841 enum {
842 STB_LOCAL = 0, // Local symbol, not visible outside obj file containing def
843 STB_GLOBAL = 1, // Global symbol, visible to all object files being combined
844 STB_WEAK = 2, // Weak symbol, like global but lower-precedence
845 STB_GNU_UNIQUE = 10,
846 STB_LOOS = 10, // Lowest operating system-specific binding type
847 STB_HIOS = 12, // Highest operating system-specific binding type
848 STB_LOPROC = 13, // Lowest processor-specific binding type
849 STB_HIPROC = 15 // Highest processor-specific binding type
850 };
851
852 // Symbol types.
853 enum {
854 STT_NOTYPE = 0, // Symbol's type is not specified
855 STT_OBJECT = 1, // Symbol is a data object (variable, array, etc.)
856 STT_FUNC = 2, // Symbol is executable code (function, etc.)
857 STT_SECTION = 3, // Symbol refers to a section
858 STT_FILE = 4, // Local, absolute symbol that refers to a file
859 STT_COMMON = 5, // An uninitialized common block
860 STT_TLS = 6, // Thread local data object
861 STT_GNU_IFUNC = 10, // GNU indirect function
862 STT_LOOS = 10, // Lowest operating system-specific symbol type
863 STT_HIOS = 12, // Highest operating system-specific symbol type
864 STT_LOPROC = 13, // Lowest processor-specific symbol type
865 STT_HIPROC = 15, // Highest processor-specific symbol type
866
867 // AMDGPU symbol types
868 STT_AMDGPU_HSA_KERNEL = 10,
869 STT_AMDGPU_HSA_INDIRECT_FUNCTION = 11,
870 STT_AMDGPU_HSA_METADATA = 12
871 };
872
873 enum {
874 STV_DEFAULT = 0, // Visibility is specified by binding type
875 STV_INTERNAL = 1, // Defined by processor supplements
876 STV_HIDDEN = 2, // Not visible to other components
877 STV_PROTECTED = 3 // Visible in other components but not preemptable
878 };
879
880 // Symbol number.
881 enum {
882 STN_UNDEF = 0
883 };
884
885 // Special relocation symbols used in the MIPS64 ELF relocation entries
886 enum {
887 RSS_UNDEF = 0, // None
888 RSS_GP = 1, // Value of gp
889 RSS_GP0 = 2, // Value of gp used to create object being relocated
890 RSS_LOC = 3 // Address of location being relocated
891 };
892
893 // Relocation entry, without explicit addend.
894 struct Elf32_Rel {
895 Elf32_Addr r_offset; // Location (file byte offset, or program virtual addr)
896 Elf32_Word r_info; // Symbol table index and type of relocation to apply
897
898 // These accessors and mutators correspond to the ELF32_R_SYM, ELF32_R_TYPE,
899 // and ELF32_R_INFO macros defined in the ELF specification:
getSymbolElf32_Rel900 Elf32_Word getSymbol() const { return (r_info >> 8); }
getTypeElf32_Rel901 unsigned char getType() const { return (unsigned char) (r_info & 0x0ff); }
setSymbolElf32_Rel902 void setSymbol(Elf32_Word s) { setSymbolAndType(s, getType()); }
setTypeElf32_Rel903 void setType(unsigned char t) { setSymbolAndType(getSymbol(), t); }
setSymbolAndTypeElf32_Rel904 void setSymbolAndType(Elf32_Word s, unsigned char t) {
905 r_info = (s << 8) + t;
906 }
907 };
908
909 // Relocation entry with explicit addend.
910 struct Elf32_Rela {
911 Elf32_Addr r_offset; // Location (file byte offset, or program virtual addr)
912 Elf32_Word r_info; // Symbol table index and type of relocation to apply
913 Elf32_Sword r_addend; // Compute value for relocatable field by adding this
914
915 // These accessors and mutators correspond to the ELF32_R_SYM, ELF32_R_TYPE,
916 // and ELF32_R_INFO macros defined in the ELF specification:
getSymbolElf32_Rela917 Elf32_Word getSymbol() const { return (r_info >> 8); }
getTypeElf32_Rela918 unsigned char getType() const { return (unsigned char) (r_info & 0x0ff); }
setSymbolElf32_Rela919 void setSymbol(Elf32_Word s) { setSymbolAndType(s, getType()); }
setTypeElf32_Rela920 void setType(unsigned char t) { setSymbolAndType(getSymbol(), t); }
setSymbolAndTypeElf32_Rela921 void setSymbolAndType(Elf32_Word s, unsigned char t) {
922 r_info = (s << 8) + t;
923 }
924 };
925
926 // Relocation entry, without explicit addend.
927 struct Elf64_Rel {
928 Elf64_Addr r_offset; // Location (file byte offset, or program virtual addr).
929 Elf64_Xword r_info; // Symbol table index and type of relocation to apply.
930
931 // These accessors and mutators correspond to the ELF64_R_SYM, ELF64_R_TYPE,
932 // and ELF64_R_INFO macros defined in the ELF specification:
getSymbolElf64_Rel933 Elf64_Word getSymbol() const { return (r_info >> 32); }
getTypeElf64_Rel934 Elf64_Word getType() const {
935 return (Elf64_Word) (r_info & 0xffffffffL);
936 }
setSymbolElf64_Rel937 void setSymbol(Elf64_Word s) { setSymbolAndType(s, getType()); }
setTypeElf64_Rel938 void setType(Elf64_Word t) { setSymbolAndType(getSymbol(), t); }
setSymbolAndTypeElf64_Rel939 void setSymbolAndType(Elf64_Word s, Elf64_Word t) {
940 r_info = ((Elf64_Xword)s << 32) + (t&0xffffffffL);
941 }
942 };
943
944 // Relocation entry with explicit addend.
945 struct Elf64_Rela {
946 Elf64_Addr r_offset; // Location (file byte offset, or program virtual addr).
947 Elf64_Xword r_info; // Symbol table index and type of relocation to apply.
948 Elf64_Sxword r_addend; // Compute value for relocatable field by adding this.
949
950 // These accessors and mutators correspond to the ELF64_R_SYM, ELF64_R_TYPE,
951 // and ELF64_R_INFO macros defined in the ELF specification:
getSymbolElf64_Rela952 Elf64_Word getSymbol() const { return (r_info >> 32); }
getTypeElf64_Rela953 Elf64_Word getType() const {
954 return (Elf64_Word) (r_info & 0xffffffffL);
955 }
setSymbolElf64_Rela956 void setSymbol(Elf64_Word s) { setSymbolAndType(s, getType()); }
setTypeElf64_Rela957 void setType(Elf64_Word t) { setSymbolAndType(getSymbol(), t); }
setSymbolAndTypeElf64_Rela958 void setSymbolAndType(Elf64_Word s, Elf64_Word t) {
959 r_info = ((Elf64_Xword)s << 32) + (t&0xffffffffL);
960 }
961 };
962
963 // Program header for ELF32.
964 struct Elf32_Phdr {
965 Elf32_Word p_type; // Type of segment
966 Elf32_Off p_offset; // File offset where segment is located, in bytes
967 Elf32_Addr p_vaddr; // Virtual address of beginning of segment
968 Elf32_Addr p_paddr; // Physical address of beginning of segment (OS-specific)
969 Elf32_Word p_filesz; // Num. of bytes in file image of segment (may be zero)
970 Elf32_Word p_memsz; // Num. of bytes in mem image of segment (may be zero)
971 Elf32_Word p_flags; // Segment flags
972 Elf32_Word p_align; // Segment alignment constraint
973 };
974
975 // Program header for ELF64.
976 struct Elf64_Phdr {
977 Elf64_Word p_type; // Type of segment
978 Elf64_Word p_flags; // Segment flags
979 Elf64_Off p_offset; // File offset where segment is located, in bytes
980 Elf64_Addr p_vaddr; // Virtual address of beginning of segment
981 Elf64_Addr p_paddr; // Physical addr of beginning of segment (OS-specific)
982 Elf64_Xword p_filesz; // Num. of bytes in file image of segment (may be zero)
983 Elf64_Xword p_memsz; // Num. of bytes in mem image of segment (may be zero)
984 Elf64_Xword p_align; // Segment alignment constraint
985 };
986
987 // Segment types.
988 enum {
989 PT_NULL = 0, // Unused segment.
990 PT_LOAD = 1, // Loadable segment.
991 PT_DYNAMIC = 2, // Dynamic linking information.
992 PT_INTERP = 3, // Interpreter pathname.
993 PT_NOTE = 4, // Auxiliary information.
994 PT_SHLIB = 5, // Reserved.
995 PT_PHDR = 6, // The program header table itself.
996 PT_TLS = 7, // The thread-local storage template.
997 PT_LOOS = 0x60000000, // Lowest operating system-specific pt entry type.
998 PT_HIOS = 0x6fffffff, // Highest operating system-specific pt entry type.
999 PT_LOPROC = 0x70000000, // Lowest processor-specific program hdr entry type.
1000 PT_HIPROC = 0x7fffffff, // Highest processor-specific program hdr entry type.
1001
1002 // x86-64 program header types.
1003 // These all contain stack unwind tables.
1004 PT_GNU_EH_FRAME = 0x6474e550,
1005 PT_SUNW_EH_FRAME = 0x6474e550,
1006 PT_SUNW_UNWIND = 0x6464e550,
1007
1008 PT_GNU_STACK = 0x6474e551, // Indicates stack executability.
1009 PT_GNU_RELRO = 0x6474e552, // Read-only after relocation.
1010
1011 // ARM program header types.
1012 PT_ARM_ARCHEXT = 0x70000000, // Platform architecture compatibility info
1013 // These all contain stack unwind tables.
1014 PT_ARM_EXIDX = 0x70000001,
1015 PT_ARM_UNWIND = 0x70000001,
1016
1017 // MIPS program header types.
1018 PT_MIPS_REGINFO = 0x70000000, // Register usage information.
1019 PT_MIPS_RTPROC = 0x70000001, // Runtime procedure table.
1020 PT_MIPS_OPTIONS = 0x70000002, // Options segment.
1021 PT_MIPS_ABIFLAGS = 0x70000003, // Abiflags segment.
1022
1023 // AMDGPU program header types.
1024 PT_AMDGPU_HSA_LOAD_GLOBAL_PROGRAM = 0x60000000,
1025 PT_AMDGPU_HSA_LOAD_GLOBAL_AGENT = 0x60000001,
1026 PT_AMDGPU_HSA_LOAD_READONLY_AGENT = 0x60000002,
1027 PT_AMDGPU_HSA_LOAD_CODE_AGENT = 0x60000003
1028 };
1029
1030 // Segment flag bits.
1031 enum : unsigned {
1032 PF_X = 1, // Execute
1033 PF_W = 2, // Write
1034 PF_R = 4, // Read
1035 PF_MASKOS = 0x0ff00000,// Bits for operating system-specific semantics.
1036 PF_MASKPROC = 0xf0000000 // Bits for processor-specific semantics.
1037 };
1038
1039 // Dynamic table entry for ELF32.
1040 struct Elf32_Dyn
1041 {
1042 Elf32_Sword d_tag; // Type of dynamic table entry.
1043 union
1044 {
1045 Elf32_Word d_val; // Integer value of entry.
1046 Elf32_Addr d_ptr; // Pointer value of entry.
1047 } d_un;
1048 };
1049
1050 // Dynamic table entry for ELF64.
1051 struct Elf64_Dyn
1052 {
1053 Elf64_Sxword d_tag; // Type of dynamic table entry.
1054 union
1055 {
1056 Elf64_Xword d_val; // Integer value of entry.
1057 Elf64_Addr d_ptr; // Pointer value of entry.
1058 } d_un;
1059 };
1060
1061 // Dynamic table entry tags.
1062 enum {
1063 DT_NULL = 0, // Marks end of dynamic array.
1064 DT_NEEDED = 1, // String table offset of needed library.
1065 DT_PLTRELSZ = 2, // Size of relocation entries in PLT.
1066 DT_PLTGOT = 3, // Address associated with linkage table.
1067 DT_HASH = 4, // Address of symbolic hash table.
1068 DT_STRTAB = 5, // Address of dynamic string table.
1069 DT_SYMTAB = 6, // Address of dynamic symbol table.
1070 DT_RELA = 7, // Address of relocation table (Rela entries).
1071 DT_RELASZ = 8, // Size of Rela relocation table.
1072 DT_RELAENT = 9, // Size of a Rela relocation entry.
1073 DT_STRSZ = 10, // Total size of the string table.
1074 DT_SYMENT = 11, // Size of a symbol table entry.
1075 DT_INIT = 12, // Address of initialization function.
1076 DT_FINI = 13, // Address of termination function.
1077 DT_SONAME = 14, // String table offset of a shared objects name.
1078 DT_RPATH = 15, // String table offset of library search path.
1079 DT_SYMBOLIC = 16, // Changes symbol resolution algorithm.
1080 DT_REL = 17, // Address of relocation table (Rel entries).
1081 DT_RELSZ = 18, // Size of Rel relocation table.
1082 DT_RELENT = 19, // Size of a Rel relocation entry.
1083 DT_PLTREL = 20, // Type of relocation entry used for linking.
1084 DT_DEBUG = 21, // Reserved for debugger.
1085 DT_TEXTREL = 22, // Relocations exist for non-writable segments.
1086 DT_JMPREL = 23, // Address of relocations associated with PLT.
1087 DT_BIND_NOW = 24, // Process all relocations before execution.
1088 DT_INIT_ARRAY = 25, // Pointer to array of initialization functions.
1089 DT_FINI_ARRAY = 26, // Pointer to array of termination functions.
1090 DT_INIT_ARRAYSZ = 27, // Size of DT_INIT_ARRAY.
1091 DT_FINI_ARRAYSZ = 28, // Size of DT_FINI_ARRAY.
1092 DT_RUNPATH = 29, // String table offset of lib search path.
1093 DT_FLAGS = 30, // Flags.
1094 DT_ENCODING = 32, // Values from here to DT_LOOS follow the rules
1095 // for the interpretation of the d_un union.
1096
1097 DT_PREINIT_ARRAY = 32, // Pointer to array of preinit functions.
1098 DT_PREINIT_ARRAYSZ = 33, // Size of the DT_PREINIT_ARRAY array.
1099
1100 DT_LOOS = 0x60000000, // Start of environment specific tags.
1101 DT_HIOS = 0x6FFFFFFF, // End of environment specific tags.
1102 DT_LOPROC = 0x70000000, // Start of processor specific tags.
1103 DT_HIPROC = 0x7FFFFFFF, // End of processor specific tags.
1104
1105 DT_GNU_HASH = 0x6FFFFEF5, // Reference to the GNU hash table.
1106 DT_RELACOUNT = 0x6FFFFFF9, // ELF32_Rela count.
1107 DT_RELCOUNT = 0x6FFFFFFA, // ELF32_Rel count.
1108
1109 DT_FLAGS_1 = 0X6FFFFFFB, // Flags_1.
1110 DT_VERSYM = 0x6FFFFFF0, // The address of .gnu.version section.
1111 DT_VERDEF = 0X6FFFFFFC, // The address of the version definition table.
1112 DT_VERDEFNUM = 0X6FFFFFFD, // The number of entries in DT_VERDEF.
1113 DT_VERNEED = 0X6FFFFFFE, // The address of the version Dependency table.
1114 DT_VERNEEDNUM = 0X6FFFFFFF, // The number of entries in DT_VERNEED.
1115
1116 // Mips specific dynamic table entry tags.
1117 DT_MIPS_RLD_VERSION = 0x70000001, // 32 bit version number for runtime
1118 // linker interface.
1119 DT_MIPS_TIME_STAMP = 0x70000002, // Time stamp.
1120 DT_MIPS_ICHECKSUM = 0x70000003, // Checksum of external strings
1121 // and common sizes.
1122 DT_MIPS_IVERSION = 0x70000004, // Index of version string
1123 // in string table.
1124 DT_MIPS_FLAGS = 0x70000005, // 32 bits of flags.
1125 DT_MIPS_BASE_ADDRESS = 0x70000006, // Base address of the segment.
1126 DT_MIPS_MSYM = 0x70000007, // Address of .msym section.
1127 DT_MIPS_CONFLICT = 0x70000008, // Address of .conflict section.
1128 DT_MIPS_LIBLIST = 0x70000009, // Address of .liblist section.
1129 DT_MIPS_LOCAL_GOTNO = 0x7000000a, // Number of local global offset
1130 // table entries.
1131 DT_MIPS_CONFLICTNO = 0x7000000b, // Number of entries
1132 // in the .conflict section.
1133 DT_MIPS_LIBLISTNO = 0x70000010, // Number of entries
1134 // in the .liblist section.
1135 DT_MIPS_SYMTABNO = 0x70000011, // Number of entries
1136 // in the .dynsym section.
1137 DT_MIPS_UNREFEXTNO = 0x70000012, // Index of first external dynamic symbol
1138 // not referenced locally.
1139 DT_MIPS_GOTSYM = 0x70000013, // Index of first dynamic symbol
1140 // in global offset table.
1141 DT_MIPS_HIPAGENO = 0x70000014, // Number of page table entries
1142 // in global offset table.
1143 DT_MIPS_RLD_MAP = 0x70000016, // Address of run time loader map,
1144 // used for debugging.
1145 DT_MIPS_DELTA_CLASS = 0x70000017, // Delta C++ class definition.
1146 DT_MIPS_DELTA_CLASS_NO = 0x70000018, // Number of entries
1147 // in DT_MIPS_DELTA_CLASS.
1148 DT_MIPS_DELTA_INSTANCE = 0x70000019, // Delta C++ class instances.
1149 DT_MIPS_DELTA_INSTANCE_NO = 0x7000001A, // Number of entries
1150 // in DT_MIPS_DELTA_INSTANCE.
1151 DT_MIPS_DELTA_RELOC = 0x7000001B, // Delta relocations.
1152 DT_MIPS_DELTA_RELOC_NO = 0x7000001C, // Number of entries
1153 // in DT_MIPS_DELTA_RELOC.
1154 DT_MIPS_DELTA_SYM = 0x7000001D, // Delta symbols that Delta
1155 // relocations refer to.
1156 DT_MIPS_DELTA_SYM_NO = 0x7000001E, // Number of entries
1157 // in DT_MIPS_DELTA_SYM.
1158 DT_MIPS_DELTA_CLASSSYM = 0x70000020, // Delta symbols that hold
1159 // class declarations.
1160 DT_MIPS_DELTA_CLASSSYM_NO = 0x70000021, // Number of entries
1161 // in DT_MIPS_DELTA_CLASSSYM.
1162 DT_MIPS_CXX_FLAGS = 0x70000022, // Flags indicating information
1163 // about C++ flavor.
1164 DT_MIPS_PIXIE_INIT = 0x70000023, // Pixie information.
1165 DT_MIPS_SYMBOL_LIB = 0x70000024, // Address of .MIPS.symlib
1166 DT_MIPS_LOCALPAGE_GOTIDX = 0x70000025, // The GOT index of the first PTE
1167 // for a segment
1168 DT_MIPS_LOCAL_GOTIDX = 0x70000026, // The GOT index of the first PTE
1169 // for a local symbol
1170 DT_MIPS_HIDDEN_GOTIDX = 0x70000027, // The GOT index of the first PTE
1171 // for a hidden symbol
1172 DT_MIPS_PROTECTED_GOTIDX = 0x70000028, // The GOT index of the first PTE
1173 // for a protected symbol
1174 DT_MIPS_OPTIONS = 0x70000029, // Address of `.MIPS.options'.
1175 DT_MIPS_INTERFACE = 0x7000002A, // Address of `.interface'.
1176 DT_MIPS_DYNSTR_ALIGN = 0x7000002B, // Unknown.
1177 DT_MIPS_INTERFACE_SIZE = 0x7000002C, // Size of the .interface section.
1178 DT_MIPS_RLD_TEXT_RESOLVE_ADDR = 0x7000002D, // Size of rld_text_resolve
1179 // function stored in the GOT.
1180 DT_MIPS_PERF_SUFFIX = 0x7000002E, // Default suffix of DSO to be added
1181 // by rld on dlopen() calls.
1182 DT_MIPS_COMPACT_SIZE = 0x7000002F, // Size of compact relocation
1183 // section (O32).
1184 DT_MIPS_GP_VALUE = 0x70000030, // GP value for auxiliary GOTs.
1185 DT_MIPS_AUX_DYNAMIC = 0x70000031, // Address of auxiliary .dynamic.
1186 DT_MIPS_PLTGOT = 0x70000032, // Address of the base of the PLTGOT.
1187 DT_MIPS_RWPLT = 0x70000034, // Points to the base
1188 // of a writable PLT.
1189 DT_MIPS_RLD_MAP_REL = 0x70000035 // Relative offset of run time loader
1190 // map, used for debugging.
1191 };
1192
1193 // DT_FLAGS values.
1194 enum {
1195 DF_ORIGIN = 0x01, // The object may reference $ORIGIN.
1196 DF_SYMBOLIC = 0x02, // Search the shared lib before searching the exe.
1197 DF_TEXTREL = 0x04, // Relocations may modify a non-writable segment.
1198 DF_BIND_NOW = 0x08, // Process all relocations on load.
1199 DF_STATIC_TLS = 0x10 // Reject attempts to load dynamically.
1200 };
1201
1202 // State flags selectable in the `d_un.d_val' element of the DT_FLAGS_1 entry.
1203 enum {
1204 DF_1_NOW = 0x00000001, // Set RTLD_NOW for this object.
1205 DF_1_GLOBAL = 0x00000002, // Set RTLD_GLOBAL for this object.
1206 DF_1_GROUP = 0x00000004, // Set RTLD_GROUP for this object.
1207 DF_1_NODELETE = 0x00000008, // Set RTLD_NODELETE for this object.
1208 DF_1_LOADFLTR = 0x00000010, // Trigger filtee loading at runtime.
1209 DF_1_INITFIRST = 0x00000020, // Set RTLD_INITFIRST for this object.
1210 DF_1_NOOPEN = 0x00000040, // Set RTLD_NOOPEN for this object.
1211 DF_1_ORIGIN = 0x00000080, // $ORIGIN must be handled.
1212 DF_1_DIRECT = 0x00000100, // Direct binding enabled.
1213 DF_1_TRANS = 0x00000200,
1214 DF_1_INTERPOSE = 0x00000400, // Object is used to interpose.
1215 DF_1_NODEFLIB = 0x00000800, // Ignore default lib search path.
1216 DF_1_NODUMP = 0x00001000, // Object can't be dldump'ed.
1217 DF_1_CONFALT = 0x00002000, // Configuration alternative created.
1218 DF_1_ENDFILTEE = 0x00004000, // Filtee terminates filters search.
1219 DF_1_DISPRELDNE = 0x00008000, // Disp reloc applied at build time.
1220 DF_1_DISPRELPND = 0x00010000, // Disp reloc applied at run-time.
1221 DF_1_NODIRECT = 0x00020000, // Object has no-direct binding.
1222 DF_1_IGNMULDEF = 0x00040000,
1223 DF_1_NOKSYMS = 0x00080000,
1224 DF_1_NOHDR = 0x00100000,
1225 DF_1_EDITED = 0x00200000, // Object is modified after built.
1226 DF_1_NORELOC = 0x00400000,
1227 DF_1_SYMINTPOSE = 0x00800000, // Object has individual interposers.
1228 DF_1_GLOBAUDIT = 0x01000000, // Global auditing required.
1229 DF_1_SINGLETON = 0x02000000 // Singleton symbols are used.
1230 };
1231
1232 // DT_MIPS_FLAGS values.
1233 enum {
1234 RHF_NONE = 0x00000000, // No flags.
1235 RHF_QUICKSTART = 0x00000001, // Uses shortcut pointers.
1236 RHF_NOTPOT = 0x00000002, // Hash size is not a power of two.
1237 RHS_NO_LIBRARY_REPLACEMENT = 0x00000004, // Ignore LD_LIBRARY_PATH.
1238 RHF_NO_MOVE = 0x00000008, // DSO address may not be relocated.
1239 RHF_SGI_ONLY = 0x00000010, // SGI specific features.
1240 RHF_GUARANTEE_INIT = 0x00000020, // Guarantee that .init will finish
1241 // executing before any non-init
1242 // code in DSO is called.
1243 RHF_DELTA_C_PLUS_PLUS = 0x00000040, // Contains Delta C++ code.
1244 RHF_GUARANTEE_START_INIT = 0x00000080, // Guarantee that .init will start
1245 // executing before any non-init
1246 // code in DSO is called.
1247 RHF_PIXIE = 0x00000100, // Generated by pixie.
1248 RHF_DEFAULT_DELAY_LOAD = 0x00000200, // Delay-load DSO by default.
1249 RHF_REQUICKSTART = 0x00000400, // Object may be requickstarted
1250 RHF_REQUICKSTARTED = 0x00000800, // Object has been requickstarted
1251 RHF_CORD = 0x00001000, // Generated by cord.
1252 RHF_NO_UNRES_UNDEF = 0x00002000, // Object contains no unresolved
1253 // undef symbols.
1254 RHF_RLD_ORDER_SAFE = 0x00004000 // Symbol table is in a safe order.
1255 };
1256
1257 // ElfXX_VerDef structure version (GNU versioning)
1258 enum {
1259 VER_DEF_NONE = 0,
1260 VER_DEF_CURRENT = 1
1261 };
1262
1263 // VerDef Flags (ElfXX_VerDef::vd_flags)
1264 enum {
1265 VER_FLG_BASE = 0x1,
1266 VER_FLG_WEAK = 0x2,
1267 VER_FLG_INFO = 0x4
1268 };
1269
1270 // Special constants for the version table. (SHT_GNU_versym/.gnu.version)
1271 enum {
1272 VER_NDX_LOCAL = 0, // Unversioned local symbol
1273 VER_NDX_GLOBAL = 1, // Unversioned global symbol
1274 VERSYM_VERSION = 0x7fff, // Version Index mask
1275 VERSYM_HIDDEN = 0x8000 // Hidden bit (non-default version)
1276 };
1277
1278 // ElfXX_VerNeed structure version (GNU versioning)
1279 enum {
1280 VER_NEED_NONE = 0,
1281 VER_NEED_CURRENT = 1
1282 };
1283
1284 } // end namespace ELF
1285
1286 } // end namespace llvm
1287
1288 #endif
1289