1 //===- llvm/BinaryFormat/ELF.h - ELF constants and structures ---*- C++ -*-===//
2 //
3 // Part of the LLVM Project, under the Apache License v2.0 with LLVM Exceptions.
4 // See https://llvm.org/LICENSE.txt for license information.
5 // SPDX-License-Identifier: Apache-2.0 WITH LLVM-exception
6 //
7 //===----------------------------------------------------------------------===//
8 //
9 // This header contains common, non-processor-specific data structures and
10 // constants for the ELF file format.
11 //
12 // The details of the ELF32 bits in this file are largely based on the Tool
13 // Interface Standard (TIS) Executable and Linking Format (ELF) Specification
14 // Version 1.2, May 1995. The ELF64 stuff is based on ELF-64 Object File Format
15 // Version 1.5, Draft 2, May 1998 as well as OpenBSD header files.
16 //
17 //===----------------------------------------------------------------------===//
18
19 #ifndef LLVM_BINARYFORMAT_ELF_H
20 #define LLVM_BINARYFORMAT_ELF_H
21
22 #include "llvm/ADT/StringRef.h"
23 #include <cstdint>
24 #include <cstring>
25 #include <string>
26
27 namespace llvm {
28 namespace ELF {
29
30 using Elf32_Addr = uint32_t; // Program address
31 using Elf32_Off = uint32_t; // File offset
32 using Elf32_Half = uint16_t;
33 using Elf32_Word = uint32_t;
34 using Elf32_Sword = int32_t;
35
36 using Elf64_Addr = uint64_t;
37 using Elf64_Off = uint64_t;
38 using Elf64_Half = uint16_t;
39 using Elf64_Word = uint32_t;
40 using Elf64_Sword = int32_t;
41 using Elf64_Xword = uint64_t;
42 using Elf64_Sxword = int64_t;
43
44 // Object file magic string.
45 static const char ElfMagic[] = {0x7f, 'E', 'L', 'F', '\0'};
46
47 // e_ident size and indices.
48 enum {
49 EI_MAG0 = 0, // File identification index.
50 EI_MAG1 = 1, // File identification index.
51 EI_MAG2 = 2, // File identification index.
52 EI_MAG3 = 3, // File identification index.
53 EI_CLASS = 4, // File class.
54 EI_DATA = 5, // Data encoding.
55 EI_VERSION = 6, // File version.
56 EI_OSABI = 7, // OS/ABI identification.
57 EI_ABIVERSION = 8, // ABI version.
58 EI_PAD = 9, // Start of padding bytes.
59 EI_NIDENT = 16 // Number of bytes in e_ident.
60 };
61
62 struct Elf32_Ehdr {
63 unsigned char e_ident[EI_NIDENT]; // ELF Identification bytes
64 Elf32_Half e_type; // Type of file (see ET_* below)
65 Elf32_Half e_machine; // Required architecture for this file (see EM_*)
66 Elf32_Word e_version; // Must be equal to 1
67 Elf32_Addr e_entry; // Address to jump to in order to start program
68 Elf32_Off e_phoff; // Program header table's file offset, in bytes
69 Elf32_Off e_shoff; // Section header table's file offset, in bytes
70 Elf32_Word e_flags; // Processor-specific flags
71 Elf32_Half e_ehsize; // Size of ELF header, in bytes
72 Elf32_Half e_phentsize; // Size of an entry in the program header table
73 Elf32_Half e_phnum; // Number of entries in the program header table
74 Elf32_Half e_shentsize; // Size of an entry in the section header table
75 Elf32_Half e_shnum; // Number of entries in the section header table
76 Elf32_Half e_shstrndx; // Sect hdr table index of sect name string table
77
checkMagicElf32_Ehdr78 bool checkMagic() const {
79 return (memcmp(e_ident, ElfMagic, strlen(ElfMagic))) == 0;
80 }
81
getFileClassElf32_Ehdr82 unsigned char getFileClass() const { return e_ident[EI_CLASS]; }
getDataEncodingElf32_Ehdr83 unsigned char getDataEncoding() const { return e_ident[EI_DATA]; }
84 };
85
86 // 64-bit ELF header. Fields are the same as for ELF32, but with different
87 // types (see above).
88 struct Elf64_Ehdr {
89 unsigned char e_ident[EI_NIDENT];
90 Elf64_Half e_type;
91 Elf64_Half e_machine;
92 Elf64_Word e_version;
93 Elf64_Addr e_entry;
94 Elf64_Off e_phoff;
95 Elf64_Off e_shoff;
96 Elf64_Word e_flags;
97 Elf64_Half e_ehsize;
98 Elf64_Half e_phentsize;
99 Elf64_Half e_phnum;
100 Elf64_Half e_shentsize;
101 Elf64_Half e_shnum;
102 Elf64_Half e_shstrndx;
103
checkMagicElf64_Ehdr104 bool checkMagic() const {
105 return (memcmp(e_ident, ElfMagic, strlen(ElfMagic))) == 0;
106 }
107
getFileClassElf64_Ehdr108 unsigned char getFileClass() const { return e_ident[EI_CLASS]; }
getDataEncodingElf64_Ehdr109 unsigned char getDataEncoding() const { return e_ident[EI_DATA]; }
110 };
111
112 // File types.
113 // See current registered ELF types at:
114 // http://www.sco.com/developers/gabi/latest/ch4.eheader.html
115 enum {
116 ET_NONE = 0, // No file type
117 ET_REL = 1, // Relocatable file
118 ET_EXEC = 2, // Executable file
119 ET_DYN = 3, // Shared object file
120 ET_CORE = 4, // Core file
121 ET_LOOS = 0xfe00, // Beginning of operating system-specific codes
122 ET_HIOS = 0xfeff, // Operating system-specific
123 ET_LOPROC = 0xff00, // Beginning of processor-specific codes
124 ET_HIPROC = 0xffff // Processor-specific
125 };
126
127 // Versioning
128 enum { EV_NONE = 0, EV_CURRENT = 1 };
129
130 // Machine architectures
131 // See current registered ELF machine architectures at:
132 // http://www.uxsglobal.com/developers/gabi/latest/ch4.eheader.html
133 enum {
134 EM_NONE = 0, // No machine
135 EM_M32 = 1, // AT&T WE 32100
136 EM_SPARC = 2, // SPARC
137 EM_386 = 3, // Intel 386
138 EM_68K = 4, // Motorola 68000
139 EM_88K = 5, // Motorola 88000
140 EM_IAMCU = 6, // Intel MCU
141 EM_860 = 7, // Intel 80860
142 EM_MIPS = 8, // MIPS R3000
143 EM_S370 = 9, // IBM System/370
144 EM_MIPS_RS3_LE = 10, // MIPS RS3000 Little-endian
145 EM_PARISC = 15, // Hewlett-Packard PA-RISC
146 EM_VPP500 = 17, // Fujitsu VPP500
147 EM_SPARC32PLUS = 18, // Enhanced instruction set SPARC
148 EM_960 = 19, // Intel 80960
149 EM_PPC = 20, // PowerPC
150 EM_PPC64 = 21, // PowerPC64
151 EM_S390 = 22, // IBM System/390
152 EM_SPU = 23, // IBM SPU/SPC
153 EM_V800 = 36, // NEC V800
154 EM_FR20 = 37, // Fujitsu FR20
155 EM_RH32 = 38, // TRW RH-32
156 EM_RCE = 39, // Motorola RCE
157 EM_ARM = 40, // ARM
158 EM_ALPHA = 41, // DEC Alpha
159 EM_SH = 42, // Hitachi SH
160 EM_SPARCV9 = 43, // SPARC V9
161 EM_TRICORE = 44, // Siemens TriCore
162 EM_ARC = 45, // Argonaut RISC Core
163 EM_H8_300 = 46, // Hitachi H8/300
164 EM_H8_300H = 47, // Hitachi H8/300H
165 EM_H8S = 48, // Hitachi H8S
166 EM_H8_500 = 49, // Hitachi H8/500
167 EM_IA_64 = 50, // Intel IA-64 processor architecture
168 EM_MIPS_X = 51, // Stanford MIPS-X
169 EM_COLDFIRE = 52, // Motorola ColdFire
170 EM_68HC12 = 53, // Motorola M68HC12
171 EM_MMA = 54, // Fujitsu MMA Multimedia Accelerator
172 EM_PCP = 55, // Siemens PCP
173 EM_NCPU = 56, // Sony nCPU embedded RISC processor
174 EM_NDR1 = 57, // Denso NDR1 microprocessor
175 EM_STARCORE = 58, // Motorola Star*Core processor
176 EM_ME16 = 59, // Toyota ME16 processor
177 EM_ST100 = 60, // STMicroelectronics ST100 processor
178 EM_TINYJ = 61, // Advanced Logic Corp. TinyJ embedded processor family
179 EM_X86_64 = 62, // AMD x86-64 architecture
180 EM_PDSP = 63, // Sony DSP Processor
181 EM_PDP10 = 64, // Digital Equipment Corp. PDP-10
182 EM_PDP11 = 65, // Digital Equipment Corp. PDP-11
183 EM_FX66 = 66, // Siemens FX66 microcontroller
184 EM_ST9PLUS = 67, // STMicroelectronics ST9+ 8/16 bit microcontroller
185 EM_ST7 = 68, // STMicroelectronics ST7 8-bit microcontroller
186 EM_68HC16 = 69, // Motorola MC68HC16 Microcontroller
187 EM_68HC11 = 70, // Motorola MC68HC11 Microcontroller
188 EM_68HC08 = 71, // Motorola MC68HC08 Microcontroller
189 EM_68HC05 = 72, // Motorola MC68HC05 Microcontroller
190 EM_SVX = 73, // Silicon Graphics SVx
191 EM_ST19 = 74, // STMicroelectronics ST19 8-bit microcontroller
192 EM_VAX = 75, // Digital VAX
193 EM_CRIS = 76, // Axis Communications 32-bit embedded processor
194 EM_JAVELIN = 77, // Infineon Technologies 32-bit embedded processor
195 EM_FIREPATH = 78, // Element 14 64-bit DSP Processor
196 EM_ZSP = 79, // LSI Logic 16-bit DSP Processor
197 EM_MMIX = 80, // Donald Knuth's educational 64-bit processor
198 EM_HUANY = 81, // Harvard University machine-independent object files
199 EM_PRISM = 82, // SiTera Prism
200 EM_AVR = 83, // Atmel AVR 8-bit microcontroller
201 EM_FR30 = 84, // Fujitsu FR30
202 EM_D10V = 85, // Mitsubishi D10V
203 EM_D30V = 86, // Mitsubishi D30V
204 EM_V850 = 87, // NEC v850
205 EM_M32R = 88, // Mitsubishi M32R
206 EM_MN10300 = 89, // Matsushita MN10300
207 EM_MN10200 = 90, // Matsushita MN10200
208 EM_PJ = 91, // picoJava
209 EM_OPENRISC = 92, // OpenRISC 32-bit embedded processor
210 EM_ARC_COMPACT = 93, // ARC International ARCompact processor (old
211 // spelling/synonym: EM_ARC_A5)
212 EM_XTENSA = 94, // Tensilica Xtensa Architecture
213 EM_VIDEOCORE = 95, // Alphamosaic VideoCore processor
214 EM_TMM_GPP = 96, // Thompson Multimedia General Purpose Processor
215 EM_NS32K = 97, // National Semiconductor 32000 series
216 EM_TPC = 98, // Tenor Network TPC processor
217 EM_SNP1K = 99, // Trebia SNP 1000 processor
218 EM_ST200 = 100, // STMicroelectronics (www.st.com) ST200
219 EM_IP2K = 101, // Ubicom IP2xxx microcontroller family
220 EM_MAX = 102, // MAX Processor
221 EM_CR = 103, // National Semiconductor CompactRISC microprocessor
222 EM_F2MC16 = 104, // Fujitsu F2MC16
223 EM_MSP430 = 105, // Texas Instruments embedded microcontroller msp430
224 EM_BLACKFIN = 106, // Analog Devices Blackfin (DSP) processor
225 EM_SE_C33 = 107, // S1C33 Family of Seiko Epson processors
226 EM_SEP = 108, // Sharp embedded microprocessor
227 EM_ARCA = 109, // Arca RISC Microprocessor
228 EM_UNICORE = 110, // Microprocessor series from PKU-Unity Ltd. and MPRC
229 // of Peking University
230 EM_EXCESS = 111, // eXcess: 16/32/64-bit configurable embedded CPU
231 EM_DXP = 112, // Icera Semiconductor Inc. Deep Execution Processor
232 EM_ALTERA_NIOS2 = 113, // Altera Nios II soft-core processor
233 EM_CRX = 114, // National Semiconductor CompactRISC CRX
234 EM_XGATE = 115, // Motorola XGATE embedded processor
235 EM_C166 = 116, // Infineon C16x/XC16x processor
236 EM_M16C = 117, // Renesas M16C series microprocessors
237 EM_DSPIC30F = 118, // Microchip Technology dsPIC30F Digital Signal
238 // Controller
239 EM_CE = 119, // Freescale Communication Engine RISC core
240 EM_M32C = 120, // Renesas M32C series microprocessors
241 EM_TSK3000 = 131, // Altium TSK3000 core
242 EM_RS08 = 132, // Freescale RS08 embedded processor
243 EM_SHARC = 133, // Analog Devices SHARC family of 32-bit DSP
244 // processors
245 EM_ECOG2 = 134, // Cyan Technology eCOG2 microprocessor
246 EM_SCORE7 = 135, // Sunplus S+core7 RISC processor
247 EM_DSP24 = 136, // New Japan Radio (NJR) 24-bit DSP Processor
248 EM_VIDEOCORE3 = 137, // Broadcom VideoCore III processor
249 EM_LATTICEMICO32 = 138, // RISC processor for Lattice FPGA architecture
250 EM_SE_C17 = 139, // Seiko Epson C17 family
251 EM_TI_C6000 = 140, // The Texas Instruments TMS320C6000 DSP family
252 EM_TI_C2000 = 141, // The Texas Instruments TMS320C2000 DSP family
253 EM_TI_C5500 = 142, // The Texas Instruments TMS320C55x DSP family
254 EM_MMDSP_PLUS = 160, // STMicroelectronics 64bit VLIW Data Signal Processor
255 EM_CYPRESS_M8C = 161, // Cypress M8C microprocessor
256 EM_R32C = 162, // Renesas R32C series microprocessors
257 EM_TRIMEDIA = 163, // NXP Semiconductors TriMedia architecture family
258 EM_HEXAGON = 164, // Qualcomm Hexagon processor
259 EM_8051 = 165, // Intel 8051 and variants
260 EM_STXP7X = 166, // STMicroelectronics STxP7x family of configurable
261 // and extensible RISC processors
262 EM_NDS32 = 167, // Andes Technology compact code size embedded RISC
263 // processor family
264 EM_ECOG1 = 168, // Cyan Technology eCOG1X family
265 EM_ECOG1X = 168, // Cyan Technology eCOG1X family
266 EM_MAXQ30 = 169, // Dallas Semiconductor MAXQ30 Core Micro-controllers
267 EM_XIMO16 = 170, // New Japan Radio (NJR) 16-bit DSP Processor
268 EM_MANIK = 171, // M2000 Reconfigurable RISC Microprocessor
269 EM_CRAYNV2 = 172, // Cray Inc. NV2 vector architecture
270 EM_RX = 173, // Renesas RX family
271 EM_METAG = 174, // Imagination Technologies META processor
272 // architecture
273 EM_MCST_ELBRUS = 175, // MCST Elbrus general purpose hardware architecture
274 EM_ECOG16 = 176, // Cyan Technology eCOG16 family
275 EM_CR16 = 177, // National Semiconductor CompactRISC CR16 16-bit
276 // microprocessor
277 EM_ETPU = 178, // Freescale Extended Time Processing Unit
278 EM_SLE9X = 179, // Infineon Technologies SLE9X core
279 EM_L10M = 180, // Intel L10M
280 EM_K10M = 181, // Intel K10M
281 EM_AARCH64 = 183, // ARM AArch64
282 EM_AVR32 = 185, // Atmel Corporation 32-bit microprocessor family
283 EM_STM8 = 186, // STMicroeletronics STM8 8-bit microcontroller
284 EM_TILE64 = 187, // Tilera TILE64 multicore architecture family
285 EM_TILEPRO = 188, // Tilera TILEPro multicore architecture family
286 EM_MICROBLAZE = 189, // Xilinx MicroBlaze 32-bit RISC soft processor core
287 EM_CUDA = 190, // NVIDIA CUDA architecture
288 EM_TILEGX = 191, // Tilera TILE-Gx multicore architecture family
289 EM_CLOUDSHIELD = 192, // CloudShield architecture family
290 EM_COREA_1ST = 193, // KIPO-KAIST Core-A 1st generation processor family
291 EM_COREA_2ND = 194, // KIPO-KAIST Core-A 2nd generation processor family
292 EM_ARC_COMPACT2 = 195, // Synopsys ARCompact V2
293 EM_OPEN8 = 196, // Open8 8-bit RISC soft processor core
294 EM_RL78 = 197, // Renesas RL78 family
295 EM_VIDEOCORE5 = 198, // Broadcom VideoCore V processor
296 EM_78KOR = 199, // Renesas 78KOR family
297 EM_56800EX = 200, // Freescale 56800EX Digital Signal Controller (DSC)
298 EM_BA1 = 201, // Beyond BA1 CPU architecture
299 EM_BA2 = 202, // Beyond BA2 CPU architecture
300 EM_XCORE = 203, // XMOS xCORE processor family
301 EM_MCHP_PIC = 204, // Microchip 8-bit PIC(r) family
302 EM_INTEL205 = 205, // Reserved by Intel
303 EM_INTEL206 = 206, // Reserved by Intel
304 EM_INTEL207 = 207, // Reserved by Intel
305 EM_INTEL208 = 208, // Reserved by Intel
306 EM_INTEL209 = 209, // Reserved by Intel
307 EM_KM32 = 210, // KM211 KM32 32-bit processor
308 EM_KMX32 = 211, // KM211 KMX32 32-bit processor
309 EM_KMX16 = 212, // KM211 KMX16 16-bit processor
310 EM_KMX8 = 213, // KM211 KMX8 8-bit processor
311 EM_KVARC = 214, // KM211 KVARC processor
312 EM_CDP = 215, // Paneve CDP architecture family
313 EM_COGE = 216, // Cognitive Smart Memory Processor
314 EM_COOL = 217, // iCelero CoolEngine
315 EM_NORC = 218, // Nanoradio Optimized RISC
316 EM_CSR_KALIMBA = 219, // CSR Kalimba architecture family
317 EM_AMDGPU = 224, // AMD GPU architecture
318 EM_RISCV = 243, // RISC-V
319 EM_LANAI = 244, // Lanai 32-bit processor
320 EM_BPF = 247, // Linux kernel bpf virtual machine
321 EM_VE = 251, // NEC SX-Aurora VE
322 EM_CSKY = 252, // C-SKY 32-bit processor
323 };
324
325 // Object file classes.
326 enum {
327 ELFCLASSNONE = 0,
328 ELFCLASS32 = 1, // 32-bit object file
329 ELFCLASS64 = 2 // 64-bit object file
330 };
331
332 // Object file byte orderings.
333 enum {
334 ELFDATANONE = 0, // Invalid data encoding.
335 ELFDATA2LSB = 1, // Little-endian object file
336 ELFDATA2MSB = 2 // Big-endian object file
337 };
338
339 // OS ABI identification.
340 enum {
341 ELFOSABI_NONE = 0, // UNIX System V ABI
342 ELFOSABI_HPUX = 1, // HP-UX operating system
343 ELFOSABI_NETBSD = 2, // NetBSD
344 ELFOSABI_GNU = 3, // GNU/Linux
345 ELFOSABI_LINUX = 3, // Historical alias for ELFOSABI_GNU.
346 ELFOSABI_HURD = 4, // GNU/Hurd
347 ELFOSABI_SOLARIS = 6, // Solaris
348 ELFOSABI_AIX = 7, // AIX
349 ELFOSABI_IRIX = 8, // IRIX
350 ELFOSABI_FREEBSD = 9, // FreeBSD
351 ELFOSABI_TRU64 = 10, // TRU64 UNIX
352 ELFOSABI_MODESTO = 11, // Novell Modesto
353 ELFOSABI_OPENBSD = 12, // OpenBSD
354 ELFOSABI_OPENVMS = 13, // OpenVMS
355 ELFOSABI_NSK = 14, // Hewlett-Packard Non-Stop Kernel
356 ELFOSABI_AROS = 15, // AROS
357 ELFOSABI_FENIXOS = 16, // FenixOS
358 ELFOSABI_CLOUDABI = 17, // Nuxi CloudABI
359 ELFOSABI_FIRST_ARCH = 64, // First architecture-specific OS ABI
360 ELFOSABI_AMDGPU_HSA = 64, // AMD HSA runtime
361 ELFOSABI_AMDGPU_PAL = 65, // AMD PAL runtime
362 ELFOSABI_AMDGPU_MESA3D = 66, // AMD GCN GPUs (GFX6+) for MESA runtime
363 ELFOSABI_ARM = 97, // ARM
364 ELFOSABI_C6000_ELFABI = 64, // Bare-metal TMS320C6000
365 ELFOSABI_C6000_LINUX = 65, // Linux TMS320C6000
366 ELFOSABI_STANDALONE = 255, // Standalone (embedded) application
367 ELFOSABI_LAST_ARCH = 255 // Last Architecture-specific OS ABI
368 };
369
370 // AMDGPU OS ABI Version identification.
371 enum {
372 // ELFABIVERSION_AMDGPU_HSA_V1 does not exist because OS ABI identification
373 // was never defined for V1.
374 ELFABIVERSION_AMDGPU_HSA_V2 = 0,
375 ELFABIVERSION_AMDGPU_HSA_V3 = 1,
376 ELFABIVERSION_AMDGPU_HSA_V4 = 2
377 };
378
379 #define ELF_RELOC(name, value) name = value,
380
381 // X86_64 relocations.
382 enum {
383 #include "ELFRelocs/x86_64.def"
384 };
385
386 // i386 relocations.
387 enum {
388 #include "ELFRelocs/i386.def"
389 };
390
391 // ELF Relocation types for PPC32
392 enum {
393 #include "ELFRelocs/PowerPC.def"
394 };
395
396 // Specific e_flags for PPC64
397 enum {
398 // e_flags bits specifying ABI:
399 // 1 for original ABI using function descriptors,
400 // 2 for revised ABI without function descriptors,
401 // 0 for unspecified or not using any features affected by the differences.
402 EF_PPC64_ABI = 3
403 };
404
405 // Special values for the st_other field in the symbol table entry for PPC64.
406 enum {
407 STO_PPC64_LOCAL_BIT = 5,
408 STO_PPC64_LOCAL_MASK = (7 << STO_PPC64_LOCAL_BIT)
409 };
decodePPC64LocalEntryOffset(unsigned Other)410 static inline int64_t decodePPC64LocalEntryOffset(unsigned Other) {
411 unsigned Val = (Other & STO_PPC64_LOCAL_MASK) >> STO_PPC64_LOCAL_BIT;
412 return ((1 << Val) >> 2) << 2;
413 }
414
415 // ELF Relocation types for PPC64
416 enum {
417 #include "ELFRelocs/PowerPC64.def"
418 };
419
420 // ELF Relocation types for AArch64
421 enum {
422 #include "ELFRelocs/AArch64.def"
423 };
424
425 // Special values for the st_other field in the symbol table entry for AArch64.
426 enum {
427 // Symbol may follow different calling convention than base PCS.
428 STO_AARCH64_VARIANT_PCS = 0x80
429 };
430
431 // ARM Specific e_flags
432 enum : unsigned {
433 EF_ARM_SOFT_FLOAT = 0x00000200U, // Legacy pre EABI_VER5
434 EF_ARM_ABI_FLOAT_SOFT = 0x00000200U, // EABI_VER5
435 EF_ARM_VFP_FLOAT = 0x00000400U, // Legacy pre EABI_VER5
436 EF_ARM_ABI_FLOAT_HARD = 0x00000400U, // EABI_VER5
437 EF_ARM_EABI_UNKNOWN = 0x00000000U,
438 EF_ARM_EABI_VER1 = 0x01000000U,
439 EF_ARM_EABI_VER2 = 0x02000000U,
440 EF_ARM_EABI_VER3 = 0x03000000U,
441 EF_ARM_EABI_VER4 = 0x04000000U,
442 EF_ARM_EABI_VER5 = 0x05000000U,
443 EF_ARM_EABIMASK = 0xFF000000U
444 };
445
446 // ELF Relocation types for ARM
447 enum {
448 #include "ELFRelocs/ARM.def"
449 };
450
451 // ARC Specific e_flags
452 enum : unsigned {
453 EF_ARC_MACH_MSK = 0x000000ff,
454 EF_ARC_OSABI_MSK = 0x00000f00,
455 E_ARC_MACH_ARC600 = 0x00000002,
456 E_ARC_MACH_ARC601 = 0x00000004,
457 E_ARC_MACH_ARC700 = 0x00000003,
458 EF_ARC_CPU_ARCV2EM = 0x00000005,
459 EF_ARC_CPU_ARCV2HS = 0x00000006,
460 E_ARC_OSABI_ORIG = 0x00000000,
461 E_ARC_OSABI_V2 = 0x00000200,
462 E_ARC_OSABI_V3 = 0x00000300,
463 E_ARC_OSABI_V4 = 0x00000400,
464 EF_ARC_PIC = 0x00000100
465 };
466
467 // ELF Relocation types for ARC
468 enum {
469 #include "ELFRelocs/ARC.def"
470 };
471
472 // AVR specific e_flags
473 enum : unsigned {
474 EF_AVR_ARCH_AVR1 = 1,
475 EF_AVR_ARCH_AVR2 = 2,
476 EF_AVR_ARCH_AVR25 = 25,
477 EF_AVR_ARCH_AVR3 = 3,
478 EF_AVR_ARCH_AVR31 = 31,
479 EF_AVR_ARCH_AVR35 = 35,
480 EF_AVR_ARCH_AVR4 = 4,
481 EF_AVR_ARCH_AVR5 = 5,
482 EF_AVR_ARCH_AVR51 = 51,
483 EF_AVR_ARCH_AVR6 = 6,
484 EF_AVR_ARCH_AVRTINY = 100,
485 EF_AVR_ARCH_XMEGA1 = 101,
486 EF_AVR_ARCH_XMEGA2 = 102,
487 EF_AVR_ARCH_XMEGA3 = 103,
488 EF_AVR_ARCH_XMEGA4 = 104,
489 EF_AVR_ARCH_XMEGA5 = 105,
490 EF_AVR_ARCH_XMEGA6 = 106,
491 EF_AVR_ARCH_XMEGA7 = 107,
492
493 EF_AVR_ARCH_MASK = 0x7f, // EF_AVR_ARCH_xxx selection mask
494
495 EF_AVR_LINKRELAX_PREPARED = 0x80, // The file is prepared for linker
496 // relaxation to be applied
497 };
498
499 // ELF Relocation types for AVR
500 enum {
501 #include "ELFRelocs/AVR.def"
502 };
503
504 // Mips Specific e_flags
505 enum : unsigned {
506 EF_MIPS_NOREORDER = 0x00000001, // Don't reorder instructions
507 EF_MIPS_PIC = 0x00000002, // Position independent code
508 EF_MIPS_CPIC = 0x00000004, // Call object with Position independent code
509 EF_MIPS_ABI2 = 0x00000020, // File uses N32 ABI
510 EF_MIPS_32BITMODE = 0x00000100, // Code compiled for a 64-bit machine
511 // in 32-bit mode
512 EF_MIPS_FP64 = 0x00000200, // Code compiled for a 32-bit machine
513 // but uses 64-bit FP registers
514 EF_MIPS_NAN2008 = 0x00000400, // Uses IEE 754-2008 NaN encoding
515
516 // ABI flags
517 EF_MIPS_ABI_O32 = 0x00001000, // This file follows the first MIPS 32 bit ABI
518 EF_MIPS_ABI_O64 = 0x00002000, // O32 ABI extended for 64-bit architecture.
519 EF_MIPS_ABI_EABI32 = 0x00003000, // EABI in 32 bit mode.
520 EF_MIPS_ABI_EABI64 = 0x00004000, // EABI in 64 bit mode.
521 EF_MIPS_ABI = 0x0000f000, // Mask for selecting EF_MIPS_ABI_ variant.
522
523 // MIPS machine variant
524 EF_MIPS_MACH_NONE = 0x00000000, // A standard MIPS implementation.
525 EF_MIPS_MACH_3900 = 0x00810000, // Toshiba R3900
526 EF_MIPS_MACH_4010 = 0x00820000, // LSI R4010
527 EF_MIPS_MACH_4100 = 0x00830000, // NEC VR4100
528 EF_MIPS_MACH_4650 = 0x00850000, // MIPS R4650
529 EF_MIPS_MACH_4120 = 0x00870000, // NEC VR4120
530 EF_MIPS_MACH_4111 = 0x00880000, // NEC VR4111/VR4181
531 EF_MIPS_MACH_SB1 = 0x008a0000, // Broadcom SB-1
532 EF_MIPS_MACH_OCTEON = 0x008b0000, // Cavium Networks Octeon
533 EF_MIPS_MACH_XLR = 0x008c0000, // RMI Xlr
534 EF_MIPS_MACH_OCTEON2 = 0x008d0000, // Cavium Networks Octeon2
535 EF_MIPS_MACH_OCTEON3 = 0x008e0000, // Cavium Networks Octeon3
536 EF_MIPS_MACH_5400 = 0x00910000, // NEC VR5400
537 EF_MIPS_MACH_5900 = 0x00920000, // MIPS R5900
538 EF_MIPS_MACH_5500 = 0x00980000, // NEC VR5500
539 EF_MIPS_MACH_9000 = 0x00990000, // Unknown
540 EF_MIPS_MACH_LS2E = 0x00a00000, // ST Microelectronics Loongson 2E
541 EF_MIPS_MACH_LS2F = 0x00a10000, // ST Microelectronics Loongson 2F
542 EF_MIPS_MACH_LS3A = 0x00a20000, // Loongson 3A
543 EF_MIPS_MACH = 0x00ff0000, // EF_MIPS_MACH_xxx selection mask
544
545 // ARCH_ASE
546 EF_MIPS_MICROMIPS = 0x02000000, // microMIPS
547 EF_MIPS_ARCH_ASE_M16 = 0x04000000, // Has Mips-16 ISA extensions
548 EF_MIPS_ARCH_ASE_MDMX = 0x08000000, // Has MDMX multimedia extensions
549 EF_MIPS_ARCH_ASE = 0x0f000000, // Mask for EF_MIPS_ARCH_ASE_xxx flags
550
551 // ARCH
552 EF_MIPS_ARCH_1 = 0x00000000, // MIPS1 instruction set
553 EF_MIPS_ARCH_2 = 0x10000000, // MIPS2 instruction set
554 EF_MIPS_ARCH_3 = 0x20000000, // MIPS3 instruction set
555 EF_MIPS_ARCH_4 = 0x30000000, // MIPS4 instruction set
556 EF_MIPS_ARCH_5 = 0x40000000, // MIPS5 instruction set
557 EF_MIPS_ARCH_32 = 0x50000000, // MIPS32 instruction set per linux not elf.h
558 EF_MIPS_ARCH_64 = 0x60000000, // MIPS64 instruction set per linux not elf.h
559 EF_MIPS_ARCH_32R2 = 0x70000000, // mips32r2, mips32r3, mips32r5
560 EF_MIPS_ARCH_64R2 = 0x80000000, // mips64r2, mips64r3, mips64r5
561 EF_MIPS_ARCH_32R6 = 0x90000000, // mips32r6
562 EF_MIPS_ARCH_64R6 = 0xa0000000, // mips64r6
563 EF_MIPS_ARCH = 0xf0000000 // Mask for applying EF_MIPS_ARCH_ variant
564 };
565
566 // ELF Relocation types for Mips
567 enum {
568 #include "ELFRelocs/Mips.def"
569 };
570
571 // Special values for the st_other field in the symbol table entry for MIPS.
572 enum {
573 STO_MIPS_OPTIONAL = 0x04, // Symbol whose definition is optional
574 STO_MIPS_PLT = 0x08, // PLT entry related dynamic table record
575 STO_MIPS_PIC = 0x20, // PIC func in an object mixes PIC/non-PIC
576 STO_MIPS_MICROMIPS = 0x80, // MIPS Specific ISA for MicroMips
577 STO_MIPS_MIPS16 = 0xf0 // MIPS Specific ISA for Mips16
578 };
579
580 // .MIPS.options section descriptor kinds
581 enum {
582 ODK_NULL = 0, // Undefined
583 ODK_REGINFO = 1, // Register usage information
584 ODK_EXCEPTIONS = 2, // Exception processing options
585 ODK_PAD = 3, // Section padding options
586 ODK_HWPATCH = 4, // Hardware patches applied
587 ODK_FILL = 5, // Linker fill value
588 ODK_TAGS = 6, // Space for tool identification
589 ODK_HWAND = 7, // Hardware AND patches applied
590 ODK_HWOR = 8, // Hardware OR patches applied
591 ODK_GP_GROUP = 9, // GP group to use for text/data sections
592 ODK_IDENT = 10, // ID information
593 ODK_PAGESIZE = 11 // Page size information
594 };
595
596 // Hexagon-specific e_flags
597 enum {
598 // Object processor version flags, bits[11:0]
599 EF_HEXAGON_MACH_V2 = 0x00000001, // Hexagon V2
600 EF_HEXAGON_MACH_V3 = 0x00000002, // Hexagon V3
601 EF_HEXAGON_MACH_V4 = 0x00000003, // Hexagon V4
602 EF_HEXAGON_MACH_V5 = 0x00000004, // Hexagon V5
603 EF_HEXAGON_MACH_V55 = 0x00000005, // Hexagon V55
604 EF_HEXAGON_MACH_V60 = 0x00000060, // Hexagon V60
605 EF_HEXAGON_MACH_V62 = 0x00000062, // Hexagon V62
606 EF_HEXAGON_MACH_V65 = 0x00000065, // Hexagon V65
607 EF_HEXAGON_MACH_V66 = 0x00000066, // Hexagon V66
608 EF_HEXAGON_MACH_V67 = 0x00000067, // Hexagon V67
609 EF_HEXAGON_MACH_V67T = 0x00008067, // Hexagon V67T
610 EF_HEXAGON_MACH_V68 = 0x00000068, // Hexagon V68
611
612 // Highest ISA version flags
613 EF_HEXAGON_ISA_MACH = 0x00000000, // Same as specified in bits[11:0]
614 // of e_flags
615 EF_HEXAGON_ISA_V2 = 0x00000010, // Hexagon V2 ISA
616 EF_HEXAGON_ISA_V3 = 0x00000020, // Hexagon V3 ISA
617 EF_HEXAGON_ISA_V4 = 0x00000030, // Hexagon V4 ISA
618 EF_HEXAGON_ISA_V5 = 0x00000040, // Hexagon V5 ISA
619 EF_HEXAGON_ISA_V55 = 0x00000050, // Hexagon V55 ISA
620 EF_HEXAGON_ISA_V60 = 0x00000060, // Hexagon V60 ISA
621 EF_HEXAGON_ISA_V62 = 0x00000062, // Hexagon V62 ISA
622 EF_HEXAGON_ISA_V65 = 0x00000065, // Hexagon V65 ISA
623 EF_HEXAGON_ISA_V66 = 0x00000066, // Hexagon V66 ISA
624 EF_HEXAGON_ISA_V67 = 0x00000067, // Hexagon V67 ISA
625 EF_HEXAGON_ISA_V68 = 0x00000068, // Hexagon V68 ISA
626 };
627
628 // Hexagon-specific section indexes for common small data
629 enum {
630 SHN_HEXAGON_SCOMMON = 0xff00, // Other access sizes
631 SHN_HEXAGON_SCOMMON_1 = 0xff01, // Byte-sized access
632 SHN_HEXAGON_SCOMMON_2 = 0xff02, // Half-word-sized access
633 SHN_HEXAGON_SCOMMON_4 = 0xff03, // Word-sized access
634 SHN_HEXAGON_SCOMMON_8 = 0xff04 // Double-word-size access
635 };
636
637 // ELF Relocation types for Hexagon
638 enum {
639 #include "ELFRelocs/Hexagon.def"
640 };
641
642 // ELF Relocation type for Lanai.
643 enum {
644 #include "ELFRelocs/Lanai.def"
645 };
646
647 // RISCV Specific e_flags
648 enum : unsigned {
649 EF_RISCV_RVC = 0x0001,
650 EF_RISCV_FLOAT_ABI = 0x0006,
651 EF_RISCV_FLOAT_ABI_SOFT = 0x0000,
652 EF_RISCV_FLOAT_ABI_SINGLE = 0x0002,
653 EF_RISCV_FLOAT_ABI_DOUBLE = 0x0004,
654 EF_RISCV_FLOAT_ABI_QUAD = 0x0006,
655 EF_RISCV_RVE = 0x0008
656 };
657
658 // ELF Relocation types for RISC-V
659 enum {
660 #include "ELFRelocs/RISCV.def"
661 };
662
663 // ELF Relocation types for S390/zSeries
664 enum {
665 #include "ELFRelocs/SystemZ.def"
666 };
667
668 // ELF Relocation type for Sparc.
669 enum {
670 #include "ELFRelocs/Sparc.def"
671 };
672
673 // AMDGPU specific e_flags.
674 enum : unsigned {
675 // Processor selection mask for EF_AMDGPU_MACH_* values.
676 EF_AMDGPU_MACH = 0x0ff,
677
678 // Not specified processor.
679 EF_AMDGPU_MACH_NONE = 0x000,
680
681 // R600-based processors.
682
683 // Radeon HD 2000/3000 Series (R600).
684 EF_AMDGPU_MACH_R600_R600 = 0x001,
685 EF_AMDGPU_MACH_R600_R630 = 0x002,
686 EF_AMDGPU_MACH_R600_RS880 = 0x003,
687 EF_AMDGPU_MACH_R600_RV670 = 0x004,
688 // Radeon HD 4000 Series (R700).
689 EF_AMDGPU_MACH_R600_RV710 = 0x005,
690 EF_AMDGPU_MACH_R600_RV730 = 0x006,
691 EF_AMDGPU_MACH_R600_RV770 = 0x007,
692 // Radeon HD 5000 Series (Evergreen).
693 EF_AMDGPU_MACH_R600_CEDAR = 0x008,
694 EF_AMDGPU_MACH_R600_CYPRESS = 0x009,
695 EF_AMDGPU_MACH_R600_JUNIPER = 0x00a,
696 EF_AMDGPU_MACH_R600_REDWOOD = 0x00b,
697 EF_AMDGPU_MACH_R600_SUMO = 0x00c,
698 // Radeon HD 6000 Series (Northern Islands).
699 EF_AMDGPU_MACH_R600_BARTS = 0x00d,
700 EF_AMDGPU_MACH_R600_CAICOS = 0x00e,
701 EF_AMDGPU_MACH_R600_CAYMAN = 0x00f,
702 EF_AMDGPU_MACH_R600_TURKS = 0x010,
703
704 // Reserved for R600-based processors.
705 EF_AMDGPU_MACH_R600_RESERVED_FIRST = 0x011,
706 EF_AMDGPU_MACH_R600_RESERVED_LAST = 0x01f,
707
708 // First/last R600-based processors.
709 EF_AMDGPU_MACH_R600_FIRST = EF_AMDGPU_MACH_R600_R600,
710 EF_AMDGPU_MACH_R600_LAST = EF_AMDGPU_MACH_R600_TURKS,
711
712 // AMDGCN-based processors.
713 EF_AMDGPU_MACH_AMDGCN_GFX600 = 0x020,
714 EF_AMDGPU_MACH_AMDGCN_GFX601 = 0x021,
715 EF_AMDGPU_MACH_AMDGCN_GFX700 = 0x022,
716 EF_AMDGPU_MACH_AMDGCN_GFX701 = 0x023,
717 EF_AMDGPU_MACH_AMDGCN_GFX702 = 0x024,
718 EF_AMDGPU_MACH_AMDGCN_GFX703 = 0x025,
719 EF_AMDGPU_MACH_AMDGCN_GFX704 = 0x026,
720 EF_AMDGPU_MACH_AMDGCN_RESERVED_0X27 = 0x027,
721 EF_AMDGPU_MACH_AMDGCN_GFX801 = 0x028,
722 EF_AMDGPU_MACH_AMDGCN_GFX802 = 0x029,
723 EF_AMDGPU_MACH_AMDGCN_GFX803 = 0x02a,
724 EF_AMDGPU_MACH_AMDGCN_GFX810 = 0x02b,
725 EF_AMDGPU_MACH_AMDGCN_GFX900 = 0x02c,
726 EF_AMDGPU_MACH_AMDGCN_GFX902 = 0x02d,
727 EF_AMDGPU_MACH_AMDGCN_GFX904 = 0x02e,
728 EF_AMDGPU_MACH_AMDGCN_GFX906 = 0x02f,
729 EF_AMDGPU_MACH_AMDGCN_GFX908 = 0x030,
730 EF_AMDGPU_MACH_AMDGCN_GFX909 = 0x031,
731 EF_AMDGPU_MACH_AMDGCN_GFX90C = 0x032,
732 EF_AMDGPU_MACH_AMDGCN_GFX1010 = 0x033,
733 EF_AMDGPU_MACH_AMDGCN_GFX1011 = 0x034,
734 EF_AMDGPU_MACH_AMDGCN_GFX1012 = 0x035,
735 EF_AMDGPU_MACH_AMDGCN_GFX1030 = 0x036,
736 EF_AMDGPU_MACH_AMDGCN_GFX1031 = 0x037,
737 EF_AMDGPU_MACH_AMDGCN_GFX1032 = 0x038,
738 EF_AMDGPU_MACH_AMDGCN_GFX1033 = 0x039,
739 EF_AMDGPU_MACH_AMDGCN_GFX602 = 0x03a,
740 EF_AMDGPU_MACH_AMDGCN_GFX705 = 0x03b,
741 EF_AMDGPU_MACH_AMDGCN_GFX805 = 0x03c,
742 EF_AMDGPU_MACH_AMDGCN_GFX1035 = 0x03d,
743 EF_AMDGPU_MACH_AMDGCN_GFX1034 = 0x03e,
744 EF_AMDGPU_MACH_AMDGCN_GFX90A = 0x03f,
745 EF_AMDGPU_MACH_AMDGCN_RESERVED_0X40 = 0x040,
746 EF_AMDGPU_MACH_AMDGCN_RESERVED_0X41 = 0x041,
747 EF_AMDGPU_MACH_AMDGCN_GFX1013 = 0x042,
748 EF_AMDGPU_MACH_AMDGCN_RESERVED_0X43 = 0x043,
749 EF_AMDGPU_MACH_AMDGCN_RESERVED_0X44 = 0x044,
750 EF_AMDGPU_MACH_AMDGCN_RESERVED_0X45 = 0x045,
751
752 // First/last AMDGCN-based processors.
753 EF_AMDGPU_MACH_AMDGCN_FIRST = EF_AMDGPU_MACH_AMDGCN_GFX600,
754 EF_AMDGPU_MACH_AMDGCN_LAST = EF_AMDGPU_MACH_AMDGCN_RESERVED_0X45,
755
756 // Indicates if the "xnack" target feature is enabled for all code contained
757 // in the object.
758 //
759 // Only valid for ELFOSABI_AMDGPU_HSA and ELFABIVERSION_AMDGPU_HSA_V2.
760 EF_AMDGPU_FEATURE_XNACK_V2 = 0x01,
761 // Indicates if the trap handler is enabled for all code contained
762 // in the object.
763 //
764 // Only valid for ELFOSABI_AMDGPU_HSA and ELFABIVERSION_AMDGPU_HSA_V2.
765 EF_AMDGPU_FEATURE_TRAP_HANDLER_V2 = 0x02,
766
767 // Indicates if the "xnack" target feature is enabled for all code contained
768 // in the object.
769 //
770 // Only valid for ELFOSABI_AMDGPU_HSA and ELFABIVERSION_AMDGPU_HSA_V3.
771 EF_AMDGPU_FEATURE_XNACK_V3 = 0x100,
772 // Indicates if the "sramecc" target feature is enabled for all code
773 // contained in the object.
774 //
775 // Only valid for ELFOSABI_AMDGPU_HSA and ELFABIVERSION_AMDGPU_HSA_V3.
776 EF_AMDGPU_FEATURE_SRAMECC_V3 = 0x200,
777
778 // XNACK selection mask for EF_AMDGPU_FEATURE_XNACK_* values.
779 //
780 // Only valid for ELFOSABI_AMDGPU_HSA and ELFABIVERSION_AMDGPU_HSA_V4.
781 EF_AMDGPU_FEATURE_XNACK_V4 = 0x300,
782 // XNACK is not supported.
783 EF_AMDGPU_FEATURE_XNACK_UNSUPPORTED_V4 = 0x000,
784 // XNACK is any/default/unspecified.
785 EF_AMDGPU_FEATURE_XNACK_ANY_V4 = 0x100,
786 // XNACK is off.
787 EF_AMDGPU_FEATURE_XNACK_OFF_V4 = 0x200,
788 // XNACK is on.
789 EF_AMDGPU_FEATURE_XNACK_ON_V4 = 0x300,
790
791 // SRAMECC selection mask for EF_AMDGPU_FEATURE_SRAMECC_* values.
792 //
793 // Only valid for ELFOSABI_AMDGPU_HSA and ELFABIVERSION_AMDGPU_HSA_V4.
794 EF_AMDGPU_FEATURE_SRAMECC_V4 = 0xc00,
795 // SRAMECC is not supported.
796 EF_AMDGPU_FEATURE_SRAMECC_UNSUPPORTED_V4 = 0x000,
797 // SRAMECC is any/default/unspecified.
798 EF_AMDGPU_FEATURE_SRAMECC_ANY_V4 = 0x400,
799 // SRAMECC is off.
800 EF_AMDGPU_FEATURE_SRAMECC_OFF_V4 = 0x800,
801 // SRAMECC is on.
802 EF_AMDGPU_FEATURE_SRAMECC_ON_V4 = 0xc00,
803 };
804
805 // ELF Relocation types for AMDGPU
806 enum {
807 #include "ELFRelocs/AMDGPU.def"
808 };
809
810 // ELF Relocation types for BPF
811 enum {
812 #include "ELFRelocs/BPF.def"
813 };
814
815 // ELF Relocation types for M68k
816 enum {
817 #include "ELFRelocs/M68k.def"
818 };
819
820 // MSP430 specific e_flags
821 enum : unsigned {
822 EF_MSP430_MACH_MSP430x11 = 11,
823 EF_MSP430_MACH_MSP430x11x1 = 110,
824 EF_MSP430_MACH_MSP430x12 = 12,
825 EF_MSP430_MACH_MSP430x13 = 13,
826 EF_MSP430_MACH_MSP430x14 = 14,
827 EF_MSP430_MACH_MSP430x15 = 15,
828 EF_MSP430_MACH_MSP430x16 = 16,
829 EF_MSP430_MACH_MSP430x20 = 20,
830 EF_MSP430_MACH_MSP430x22 = 22,
831 EF_MSP430_MACH_MSP430x23 = 23,
832 EF_MSP430_MACH_MSP430x24 = 24,
833 EF_MSP430_MACH_MSP430x26 = 26,
834 EF_MSP430_MACH_MSP430x31 = 31,
835 EF_MSP430_MACH_MSP430x32 = 32,
836 EF_MSP430_MACH_MSP430x33 = 33,
837 EF_MSP430_MACH_MSP430x41 = 41,
838 EF_MSP430_MACH_MSP430x42 = 42,
839 EF_MSP430_MACH_MSP430x43 = 43,
840 EF_MSP430_MACH_MSP430x44 = 44,
841 EF_MSP430_MACH_MSP430X = 45,
842 EF_MSP430_MACH_MSP430x46 = 46,
843 EF_MSP430_MACH_MSP430x47 = 47,
844 EF_MSP430_MACH_MSP430x54 = 54,
845 };
846
847 // ELF Relocation types for MSP430
848 enum {
849 #include "ELFRelocs/MSP430.def"
850 };
851
852 // ELF Relocation type for VE.
853 enum {
854 #include "ELFRelocs/VE.def"
855 };
856
857
858 // ELF Relocation types for CSKY
859 enum {
860 #include "ELFRelocs/CSKY.def"
861 };
862
863 #undef ELF_RELOC
864
865 // Section header.
866 struct Elf32_Shdr {
867 Elf32_Word sh_name; // Section name (index into string table)
868 Elf32_Word sh_type; // Section type (SHT_*)
869 Elf32_Word sh_flags; // Section flags (SHF_*)
870 Elf32_Addr sh_addr; // Address where section is to be loaded
871 Elf32_Off sh_offset; // File offset of section data, in bytes
872 Elf32_Word sh_size; // Size of section, in bytes
873 Elf32_Word sh_link; // Section type-specific header table index link
874 Elf32_Word sh_info; // Section type-specific extra information
875 Elf32_Word sh_addralign; // Section address alignment
876 Elf32_Word sh_entsize; // Size of records contained within the section
877 };
878
879 // Section header for ELF64 - same fields as ELF32, different types.
880 struct Elf64_Shdr {
881 Elf64_Word sh_name;
882 Elf64_Word sh_type;
883 Elf64_Xword sh_flags;
884 Elf64_Addr sh_addr;
885 Elf64_Off sh_offset;
886 Elf64_Xword sh_size;
887 Elf64_Word sh_link;
888 Elf64_Word sh_info;
889 Elf64_Xword sh_addralign;
890 Elf64_Xword sh_entsize;
891 };
892
893 // Special section indices.
894 enum {
895 SHN_UNDEF = 0, // Undefined, missing, irrelevant, or meaningless
896 SHN_LORESERVE = 0xff00, // Lowest reserved index
897 SHN_LOPROC = 0xff00, // Lowest processor-specific index
898 SHN_HIPROC = 0xff1f, // Highest processor-specific index
899 SHN_LOOS = 0xff20, // Lowest operating system-specific index
900 SHN_HIOS = 0xff3f, // Highest operating system-specific index
901 SHN_ABS = 0xfff1, // Symbol has absolute value; does not need relocation
902 SHN_COMMON = 0xfff2, // FORTRAN COMMON or C external global variables
903 SHN_XINDEX = 0xffff, // Mark that the index is >= SHN_LORESERVE
904 SHN_HIRESERVE = 0xffff // Highest reserved index
905 };
906
907 // Section types.
908 enum : unsigned {
909 SHT_NULL = 0, // No associated section (inactive entry).
910 SHT_PROGBITS = 1, // Program-defined contents.
911 SHT_SYMTAB = 2, // Symbol table.
912 SHT_STRTAB = 3, // String table.
913 SHT_RELA = 4, // Relocation entries; explicit addends.
914 SHT_HASH = 5, // Symbol hash table.
915 SHT_DYNAMIC = 6, // Information for dynamic linking.
916 SHT_NOTE = 7, // Information about the file.
917 SHT_NOBITS = 8, // Data occupies no space in the file.
918 SHT_REL = 9, // Relocation entries; no explicit addends.
919 SHT_SHLIB = 10, // Reserved.
920 SHT_DYNSYM = 11, // Symbol table.
921 SHT_INIT_ARRAY = 14, // Pointers to initialization functions.
922 SHT_FINI_ARRAY = 15, // Pointers to termination functions.
923 SHT_PREINIT_ARRAY = 16, // Pointers to pre-init functions.
924 SHT_GROUP = 17, // Section group.
925 SHT_SYMTAB_SHNDX = 18, // Indices for SHN_XINDEX entries.
926 // Experimental support for SHT_RELR sections. For details, see proposal
927 // at https://groups.google.com/forum/#!topic/generic-abi/bX460iggiKg
928 SHT_RELR = 19, // Relocation entries; only offsets.
929 SHT_LOOS = 0x60000000, // Lowest operating system-specific type.
930 // Android packed relocation section types.
931 // https://android.googlesource.com/platform/bionic/+/6f12bfece5dcc01325e0abba56a46b1bcf991c69/tools/relocation_packer/src/elf_file.cc#37
932 SHT_ANDROID_REL = 0x60000001,
933 SHT_ANDROID_RELA = 0x60000002,
934 SHT_LLVM_ODRTAB = 0x6fff4c00, // LLVM ODR table.
935 SHT_LLVM_LINKER_OPTIONS = 0x6fff4c01, // LLVM Linker Options.
936 SHT_LLVM_ADDRSIG = 0x6fff4c03, // List of address-significant symbols
937 // for safe ICF.
938 SHT_LLVM_DEPENDENT_LIBRARIES =
939 0x6fff4c04, // LLVM Dependent Library Specifiers.
940 SHT_LLVM_SYMPART = 0x6fff4c05, // Symbol partition specification.
941 SHT_LLVM_PART_EHDR = 0x6fff4c06, // ELF header for loadable partition.
942 SHT_LLVM_PART_PHDR = 0x6fff4c07, // Phdrs for loadable partition.
943 SHT_LLVM_BB_ADDR_MAP = 0x6fff4c08, // LLVM Basic Block Address Map.
944 SHT_LLVM_CALL_GRAPH_PROFILE = 0x6fff4c09, // LLVM Call Graph Profile.
945 // Android's experimental support for SHT_RELR sections.
946 // https://android.googlesource.com/platform/bionic/+/b7feec74547f84559a1467aca02708ff61346d2a/libc/include/elf.h#512
947 SHT_ANDROID_RELR = 0x6fffff00, // Relocation entries; only offsets.
948 SHT_GNU_ATTRIBUTES = 0x6ffffff5, // Object attributes.
949 SHT_GNU_HASH = 0x6ffffff6, // GNU-style hash table.
950 SHT_GNU_verdef = 0x6ffffffd, // GNU version definitions.
951 SHT_GNU_verneed = 0x6ffffffe, // GNU version references.
952 SHT_GNU_versym = 0x6fffffff, // GNU symbol versions table.
953 SHT_HIOS = 0x6fffffff, // Highest operating system-specific type.
954 SHT_LOPROC = 0x70000000, // Lowest processor arch-specific type.
955 // Fixme: All this is duplicated in MCSectionELF. Why??
956 // Exception Index table
957 SHT_ARM_EXIDX = 0x70000001U,
958 // BPABI DLL dynamic linking pre-emption map
959 SHT_ARM_PREEMPTMAP = 0x70000002U,
960 // Object file compatibility attributes
961 SHT_ARM_ATTRIBUTES = 0x70000003U,
962 SHT_ARM_DEBUGOVERLAY = 0x70000004U,
963 SHT_ARM_OVERLAYSECTION = 0x70000005U,
964 SHT_HEX_ORDERED = 0x70000000, // Link editor is to sort the entries in
965 // this section based on their sizes
966 SHT_X86_64_UNWIND = 0x70000001, // Unwind information
967
968 SHT_MIPS_REGINFO = 0x70000006, // Register usage information
969 SHT_MIPS_OPTIONS = 0x7000000d, // General options
970 SHT_MIPS_DWARF = 0x7000001e, // DWARF debugging section.
971 SHT_MIPS_ABIFLAGS = 0x7000002a, // ABI information.
972
973 SHT_MSP430_ATTRIBUTES = 0x70000003U,
974
975 SHT_RISCV_ATTRIBUTES = 0x70000003U,
976
977 SHT_HIPROC = 0x7fffffff, // Highest processor arch-specific type.
978 SHT_LOUSER = 0x80000000, // Lowest type reserved for applications.
979 SHT_HIUSER = 0xffffffff // Highest type reserved for applications.
980 };
981
982 // Section flags.
983 enum : unsigned {
984 // Section data should be writable during execution.
985 SHF_WRITE = 0x1,
986
987 // Section occupies memory during program execution.
988 SHF_ALLOC = 0x2,
989
990 // Section contains executable machine instructions.
991 SHF_EXECINSTR = 0x4,
992
993 // The data in this section may be merged.
994 SHF_MERGE = 0x10,
995
996 // The data in this section is null-terminated strings.
997 SHF_STRINGS = 0x20,
998
999 // A field in this section holds a section header table index.
1000 SHF_INFO_LINK = 0x40U,
1001
1002 // Adds special ordering requirements for link editors.
1003 SHF_LINK_ORDER = 0x80U,
1004
1005 // This section requires special OS-specific processing to avoid incorrect
1006 // behavior.
1007 SHF_OS_NONCONFORMING = 0x100U,
1008
1009 // This section is a member of a section group.
1010 SHF_GROUP = 0x200U,
1011
1012 // This section holds Thread-Local Storage.
1013 SHF_TLS = 0x400U,
1014
1015 // Identifies a section containing compressed data.
1016 SHF_COMPRESSED = 0x800U,
1017
1018 // This section should not be garbage collected by the linker.
1019 SHF_GNU_RETAIN = 0x200000,
1020
1021 // This section is excluded from the final executable or shared library.
1022 SHF_EXCLUDE = 0x80000000U,
1023
1024 // Start of target-specific flags.
1025
1026 SHF_MASKOS = 0x0ff00000,
1027
1028 // Bits indicating processor-specific flags.
1029 SHF_MASKPROC = 0xf0000000,
1030
1031 /// All sections with the "d" flag are grouped together by the linker to form
1032 /// the data section and the dp register is set to the start of the section by
1033 /// the boot code.
1034 XCORE_SHF_DP_SECTION = 0x10000000,
1035
1036 /// All sections with the "c" flag are grouped together by the linker to form
1037 /// the constant pool and the cp register is set to the start of the constant
1038 /// pool by the boot code.
1039 XCORE_SHF_CP_SECTION = 0x20000000,
1040
1041 // If an object file section does not have this flag set, then it may not hold
1042 // more than 2GB and can be freely referred to in objects using smaller code
1043 // models. Otherwise, only objects using larger code models can refer to them.
1044 // For example, a medium code model object can refer to data in a section that
1045 // sets this flag besides being able to refer to data in a section that does
1046 // not set it; likewise, a small code model object can refer only to code in a
1047 // section that does not set this flag.
1048 SHF_X86_64_LARGE = 0x10000000,
1049
1050 // All sections with the GPREL flag are grouped into a global data area
1051 // for faster accesses
1052 SHF_HEX_GPREL = 0x10000000,
1053
1054 // Section contains text/data which may be replicated in other sections.
1055 // Linker must retain only one copy.
1056 SHF_MIPS_NODUPES = 0x01000000,
1057
1058 // Linker must generate implicit hidden weak names.
1059 SHF_MIPS_NAMES = 0x02000000,
1060
1061 // Section data local to process.
1062 SHF_MIPS_LOCAL = 0x04000000,
1063
1064 // Do not strip this section.
1065 SHF_MIPS_NOSTRIP = 0x08000000,
1066
1067 // Section must be part of global data area.
1068 SHF_MIPS_GPREL = 0x10000000,
1069
1070 // This section should be merged.
1071 SHF_MIPS_MERGE = 0x20000000,
1072
1073 // Address size to be inferred from section entry size.
1074 SHF_MIPS_ADDR = 0x40000000,
1075
1076 // Section data is string data by default.
1077 SHF_MIPS_STRING = 0x80000000,
1078
1079 // Make code section unreadable when in execute-only mode
1080 SHF_ARM_PURECODE = 0x20000000
1081 };
1082
1083 // Section Group Flags
1084 enum : unsigned {
1085 GRP_COMDAT = 0x1,
1086 GRP_MASKOS = 0x0ff00000,
1087 GRP_MASKPROC = 0xf0000000
1088 };
1089
1090 // Symbol table entries for ELF32.
1091 struct Elf32_Sym {
1092 Elf32_Word st_name; // Symbol name (index into string table)
1093 Elf32_Addr st_value; // Value or address associated with the symbol
1094 Elf32_Word st_size; // Size of the symbol
1095 unsigned char st_info; // Symbol's type and binding attributes
1096 unsigned char st_other; // Must be zero; reserved
1097 Elf32_Half st_shndx; // Which section (header table index) it's defined in
1098
1099 // These accessors and mutators correspond to the ELF32_ST_BIND,
1100 // ELF32_ST_TYPE, and ELF32_ST_INFO macros defined in the ELF specification:
getBindingElf32_Sym1101 unsigned char getBinding() const { return st_info >> 4; }
getTypeElf32_Sym1102 unsigned char getType() const { return st_info & 0x0f; }
setBindingElf32_Sym1103 void setBinding(unsigned char b) { setBindingAndType(b, getType()); }
setTypeElf32_Sym1104 void setType(unsigned char t) { setBindingAndType(getBinding(), t); }
setBindingAndTypeElf32_Sym1105 void setBindingAndType(unsigned char b, unsigned char t) {
1106 st_info = (b << 4) + (t & 0x0f);
1107 }
1108 };
1109
1110 // Symbol table entries for ELF64.
1111 struct Elf64_Sym {
1112 Elf64_Word st_name; // Symbol name (index into string table)
1113 unsigned char st_info; // Symbol's type and binding attributes
1114 unsigned char st_other; // Must be zero; reserved
1115 Elf64_Half st_shndx; // Which section (header tbl index) it's defined in
1116 Elf64_Addr st_value; // Value or address associated with the symbol
1117 Elf64_Xword st_size; // Size of the symbol
1118
1119 // These accessors and mutators are identical to those defined for ELF32
1120 // symbol table entries.
getBindingElf64_Sym1121 unsigned char getBinding() const { return st_info >> 4; }
getTypeElf64_Sym1122 unsigned char getType() const { return st_info & 0x0f; }
setBindingElf64_Sym1123 void setBinding(unsigned char b) { setBindingAndType(b, getType()); }
setTypeElf64_Sym1124 void setType(unsigned char t) { setBindingAndType(getBinding(), t); }
setBindingAndTypeElf64_Sym1125 void setBindingAndType(unsigned char b, unsigned char t) {
1126 st_info = (b << 4) + (t & 0x0f);
1127 }
1128 };
1129
1130 // The size (in bytes) of symbol table entries.
1131 enum {
1132 SYMENTRY_SIZE32 = 16, // 32-bit symbol entry size
1133 SYMENTRY_SIZE64 = 24 // 64-bit symbol entry size.
1134 };
1135
1136 // Symbol bindings.
1137 enum {
1138 STB_LOCAL = 0, // Local symbol, not visible outside obj file containing def
1139 STB_GLOBAL = 1, // Global symbol, visible to all object files being combined
1140 STB_WEAK = 2, // Weak symbol, like global but lower-precedence
1141 STB_GNU_UNIQUE = 10,
1142 STB_LOOS = 10, // Lowest operating system-specific binding type
1143 STB_HIOS = 12, // Highest operating system-specific binding type
1144 STB_LOPROC = 13, // Lowest processor-specific binding type
1145 STB_HIPROC = 15 // Highest processor-specific binding type
1146 };
1147
1148 // Symbol types.
1149 enum {
1150 STT_NOTYPE = 0, // Symbol's type is not specified
1151 STT_OBJECT = 1, // Symbol is a data object (variable, array, etc.)
1152 STT_FUNC = 2, // Symbol is executable code (function, etc.)
1153 STT_SECTION = 3, // Symbol refers to a section
1154 STT_FILE = 4, // Local, absolute symbol that refers to a file
1155 STT_COMMON = 5, // An uninitialized common block
1156 STT_TLS = 6, // Thread local data object
1157 STT_GNU_IFUNC = 10, // GNU indirect function
1158 STT_LOOS = 10, // Lowest operating system-specific symbol type
1159 STT_HIOS = 12, // Highest operating system-specific symbol type
1160 STT_LOPROC = 13, // Lowest processor-specific symbol type
1161 STT_HIPROC = 15, // Highest processor-specific symbol type
1162
1163 // AMDGPU symbol types
1164 STT_AMDGPU_HSA_KERNEL = 10
1165 };
1166
1167 enum {
1168 STV_DEFAULT = 0, // Visibility is specified by binding type
1169 STV_INTERNAL = 1, // Defined by processor supplements
1170 STV_HIDDEN = 2, // Not visible to other components
1171 STV_PROTECTED = 3 // Visible in other components but not preemptable
1172 };
1173
1174 // Symbol number.
1175 enum { STN_UNDEF = 0 };
1176
1177 // Special relocation symbols used in the MIPS64 ELF relocation entries
1178 enum {
1179 RSS_UNDEF = 0, // None
1180 RSS_GP = 1, // Value of gp
1181 RSS_GP0 = 2, // Value of gp used to create object being relocated
1182 RSS_LOC = 3 // Address of location being relocated
1183 };
1184
1185 // Relocation entry, without explicit addend.
1186 struct Elf32_Rel {
1187 Elf32_Addr r_offset; // Location (file byte offset, or program virtual addr)
1188 Elf32_Word r_info; // Symbol table index and type of relocation to apply
1189
1190 // These accessors and mutators correspond to the ELF32_R_SYM, ELF32_R_TYPE,
1191 // and ELF32_R_INFO macros defined in the ELF specification:
getSymbolElf32_Rel1192 Elf32_Word getSymbol() const { return (r_info >> 8); }
getTypeElf32_Rel1193 unsigned char getType() const { return (unsigned char)(r_info & 0x0ff); }
setSymbolElf32_Rel1194 void setSymbol(Elf32_Word s) { setSymbolAndType(s, getType()); }
setTypeElf32_Rel1195 void setType(unsigned char t) { setSymbolAndType(getSymbol(), t); }
setSymbolAndTypeElf32_Rel1196 void setSymbolAndType(Elf32_Word s, unsigned char t) {
1197 r_info = (s << 8) + t;
1198 }
1199 };
1200
1201 // Relocation entry with explicit addend.
1202 struct Elf32_Rela {
1203 Elf32_Addr r_offset; // Location (file byte offset, or program virtual addr)
1204 Elf32_Word r_info; // Symbol table index and type of relocation to apply
1205 Elf32_Sword r_addend; // Compute value for relocatable field by adding this
1206
1207 // These accessors and mutators correspond to the ELF32_R_SYM, ELF32_R_TYPE,
1208 // and ELF32_R_INFO macros defined in the ELF specification:
getSymbolElf32_Rela1209 Elf32_Word getSymbol() const { return (r_info >> 8); }
getTypeElf32_Rela1210 unsigned char getType() const { return (unsigned char)(r_info & 0x0ff); }
setSymbolElf32_Rela1211 void setSymbol(Elf32_Word s) { setSymbolAndType(s, getType()); }
setTypeElf32_Rela1212 void setType(unsigned char t) { setSymbolAndType(getSymbol(), t); }
setSymbolAndTypeElf32_Rela1213 void setSymbolAndType(Elf32_Word s, unsigned char t) {
1214 r_info = (s << 8) + t;
1215 }
1216 };
1217
1218 // Relocation entry without explicit addend or info (relative relocations only).
1219 typedef Elf32_Word Elf32_Relr; // offset/bitmap for relative relocations
1220
1221 // Relocation entry, without explicit addend.
1222 struct Elf64_Rel {
1223 Elf64_Addr r_offset; // Location (file byte offset, or program virtual addr).
1224 Elf64_Xword r_info; // Symbol table index and type of relocation to apply.
1225
1226 // These accessors and mutators correspond to the ELF64_R_SYM, ELF64_R_TYPE,
1227 // and ELF64_R_INFO macros defined in the ELF specification:
getSymbolElf64_Rel1228 Elf64_Word getSymbol() const { return (r_info >> 32); }
getTypeElf64_Rel1229 Elf64_Word getType() const { return (Elf64_Word)(r_info & 0xffffffffL); }
setSymbolElf64_Rel1230 void setSymbol(Elf64_Word s) { setSymbolAndType(s, getType()); }
setTypeElf64_Rel1231 void setType(Elf64_Word t) { setSymbolAndType(getSymbol(), t); }
setSymbolAndTypeElf64_Rel1232 void setSymbolAndType(Elf64_Word s, Elf64_Word t) {
1233 r_info = ((Elf64_Xword)s << 32) + (t & 0xffffffffL);
1234 }
1235 };
1236
1237 // Relocation entry with explicit addend.
1238 struct Elf64_Rela {
1239 Elf64_Addr r_offset; // Location (file byte offset, or program virtual addr).
1240 Elf64_Xword r_info; // Symbol table index and type of relocation to apply.
1241 Elf64_Sxword r_addend; // Compute value for relocatable field by adding this.
1242
1243 // These accessors and mutators correspond to the ELF64_R_SYM, ELF64_R_TYPE,
1244 // and ELF64_R_INFO macros defined in the ELF specification:
getSymbolElf64_Rela1245 Elf64_Word getSymbol() const { return (r_info >> 32); }
getTypeElf64_Rela1246 Elf64_Word getType() const { return (Elf64_Word)(r_info & 0xffffffffL); }
setSymbolElf64_Rela1247 void setSymbol(Elf64_Word s) { setSymbolAndType(s, getType()); }
setTypeElf64_Rela1248 void setType(Elf64_Word t) { setSymbolAndType(getSymbol(), t); }
setSymbolAndTypeElf64_Rela1249 void setSymbolAndType(Elf64_Word s, Elf64_Word t) {
1250 r_info = ((Elf64_Xword)s << 32) + (t & 0xffffffffL);
1251 }
1252 };
1253
1254 // Relocation entry without explicit addend or info (relative relocations only).
1255 typedef Elf64_Xword Elf64_Relr; // offset/bitmap for relative relocations
1256
1257 // Program header for ELF32.
1258 struct Elf32_Phdr {
1259 Elf32_Word p_type; // Type of segment
1260 Elf32_Off p_offset; // File offset where segment is located, in bytes
1261 Elf32_Addr p_vaddr; // Virtual address of beginning of segment
1262 Elf32_Addr p_paddr; // Physical address of beginning of segment (OS-specific)
1263 Elf32_Word p_filesz; // Num. of bytes in file image of segment (may be zero)
1264 Elf32_Word p_memsz; // Num. of bytes in mem image of segment (may be zero)
1265 Elf32_Word p_flags; // Segment flags
1266 Elf32_Word p_align; // Segment alignment constraint
1267 };
1268
1269 // Program header for ELF64.
1270 struct Elf64_Phdr {
1271 Elf64_Word p_type; // Type of segment
1272 Elf64_Word p_flags; // Segment flags
1273 Elf64_Off p_offset; // File offset where segment is located, in bytes
1274 Elf64_Addr p_vaddr; // Virtual address of beginning of segment
1275 Elf64_Addr p_paddr; // Physical addr of beginning of segment (OS-specific)
1276 Elf64_Xword p_filesz; // Num. of bytes in file image of segment (may be zero)
1277 Elf64_Xword p_memsz; // Num. of bytes in mem image of segment (may be zero)
1278 Elf64_Xword p_align; // Segment alignment constraint
1279 };
1280
1281 // Segment types.
1282 enum {
1283 PT_NULL = 0, // Unused segment.
1284 PT_LOAD = 1, // Loadable segment.
1285 PT_DYNAMIC = 2, // Dynamic linking information.
1286 PT_INTERP = 3, // Interpreter pathname.
1287 PT_NOTE = 4, // Auxiliary information.
1288 PT_SHLIB = 5, // Reserved.
1289 PT_PHDR = 6, // The program header table itself.
1290 PT_TLS = 7, // The thread-local storage template.
1291 PT_LOOS = 0x60000000, // Lowest operating system-specific pt entry type.
1292 PT_HIOS = 0x6fffffff, // Highest operating system-specific pt entry type.
1293 PT_LOPROC = 0x70000000, // Lowest processor-specific program hdr entry type.
1294 PT_HIPROC = 0x7fffffff, // Highest processor-specific program hdr entry type.
1295
1296 // x86-64 program header types.
1297 // These all contain stack unwind tables.
1298 PT_GNU_EH_FRAME = 0x6474e550,
1299 PT_SUNW_EH_FRAME = 0x6474e550,
1300 PT_SUNW_UNWIND = 0x6464e550,
1301
1302 PT_GNU_STACK = 0x6474e551, // Indicates stack executability.
1303 PT_GNU_RELRO = 0x6474e552, // Read-only after relocation.
1304 PT_GNU_PROPERTY = 0x6474e553, // .note.gnu.property notes sections.
1305
1306 PT_OPENBSD_RANDOMIZE = 0x65a3dbe6, // Fill with random data.
1307 PT_OPENBSD_WXNEEDED = 0x65a3dbe7, // Program does W^X violations.
1308 PT_OPENBSD_BOOTDATA = 0x65a41be6, // Section for boot arguments.
1309
1310 // ARM program header types.
1311 PT_ARM_ARCHEXT = 0x70000000, // Platform architecture compatibility info
1312 // These all contain stack unwind tables.
1313 PT_ARM_EXIDX = 0x70000001,
1314 PT_ARM_UNWIND = 0x70000001,
1315
1316 // MIPS program header types.
1317 PT_MIPS_REGINFO = 0x70000000, // Register usage information.
1318 PT_MIPS_RTPROC = 0x70000001, // Runtime procedure table.
1319 PT_MIPS_OPTIONS = 0x70000002, // Options segment.
1320 PT_MIPS_ABIFLAGS = 0x70000003, // Abiflags segment.
1321 };
1322
1323 // Segment flag bits.
1324 enum : unsigned {
1325 PF_X = 1, // Execute
1326 PF_W = 2, // Write
1327 PF_R = 4, // Read
1328 PF_MASKOS = 0x0ff00000, // Bits for operating system-specific semantics.
1329 PF_MASKPROC = 0xf0000000 // Bits for processor-specific semantics.
1330 };
1331
1332 // Dynamic table entry for ELF32.
1333 struct Elf32_Dyn {
1334 Elf32_Sword d_tag; // Type of dynamic table entry.
1335 union {
1336 Elf32_Word d_val; // Integer value of entry.
1337 Elf32_Addr d_ptr; // Pointer value of entry.
1338 } d_un;
1339 };
1340
1341 // Dynamic table entry for ELF64.
1342 struct Elf64_Dyn {
1343 Elf64_Sxword d_tag; // Type of dynamic table entry.
1344 union {
1345 Elf64_Xword d_val; // Integer value of entry.
1346 Elf64_Addr d_ptr; // Pointer value of entry.
1347 } d_un;
1348 };
1349
1350 // Dynamic table entry tags.
1351 enum {
1352 #define DYNAMIC_TAG(name, value) DT_##name = value,
1353 #include "DynamicTags.def"
1354 #undef DYNAMIC_TAG
1355 };
1356
1357 // DT_FLAGS values.
1358 enum {
1359 DF_ORIGIN = 0x01, // The object may reference $ORIGIN.
1360 DF_SYMBOLIC = 0x02, // Search the shared lib before searching the exe.
1361 DF_TEXTREL = 0x04, // Relocations may modify a non-writable segment.
1362 DF_BIND_NOW = 0x08, // Process all relocations on load.
1363 DF_STATIC_TLS = 0x10 // Reject attempts to load dynamically.
1364 };
1365
1366 // State flags selectable in the `d_un.d_val' element of the DT_FLAGS_1 entry.
1367 enum {
1368 DF_1_NOW = 0x00000001, // Set RTLD_NOW for this object.
1369 DF_1_GLOBAL = 0x00000002, // Set RTLD_GLOBAL for this object.
1370 DF_1_GROUP = 0x00000004, // Set RTLD_GROUP for this object.
1371 DF_1_NODELETE = 0x00000008, // Set RTLD_NODELETE for this object.
1372 DF_1_LOADFLTR = 0x00000010, // Trigger filtee loading at runtime.
1373 DF_1_INITFIRST = 0x00000020, // Set RTLD_INITFIRST for this object.
1374 DF_1_NOOPEN = 0x00000040, // Set RTLD_NOOPEN for this object.
1375 DF_1_ORIGIN = 0x00000080, // $ORIGIN must be handled.
1376 DF_1_DIRECT = 0x00000100, // Direct binding enabled.
1377 DF_1_TRANS = 0x00000200,
1378 DF_1_INTERPOSE = 0x00000400, // Object is used to interpose.
1379 DF_1_NODEFLIB = 0x00000800, // Ignore default lib search path.
1380 DF_1_NODUMP = 0x00001000, // Object can't be dldump'ed.
1381 DF_1_CONFALT = 0x00002000, // Configuration alternative created.
1382 DF_1_ENDFILTEE = 0x00004000, // Filtee terminates filters search.
1383 DF_1_DISPRELDNE = 0x00008000, // Disp reloc applied at build time.
1384 DF_1_DISPRELPND = 0x00010000, // Disp reloc applied at run-time.
1385 DF_1_NODIRECT = 0x00020000, // Object has no-direct binding.
1386 DF_1_IGNMULDEF = 0x00040000,
1387 DF_1_NOKSYMS = 0x00080000,
1388 DF_1_NOHDR = 0x00100000,
1389 DF_1_EDITED = 0x00200000, // Object is modified after built.
1390 DF_1_NORELOC = 0x00400000,
1391 DF_1_SYMINTPOSE = 0x00800000, // Object has individual interposers.
1392 DF_1_GLOBAUDIT = 0x01000000, // Global auditing required.
1393 DF_1_SINGLETON = 0x02000000, // Singleton symbols are used.
1394 DF_1_PIE = 0x08000000, // Object is a position-independent executable.
1395 };
1396
1397 // DT_MIPS_FLAGS values.
1398 enum {
1399 RHF_NONE = 0x00000000, // No flags.
1400 RHF_QUICKSTART = 0x00000001, // Uses shortcut pointers.
1401 RHF_NOTPOT = 0x00000002, // Hash size is not a power of two.
1402 RHS_NO_LIBRARY_REPLACEMENT = 0x00000004, // Ignore LD_LIBRARY_PATH.
1403 RHF_NO_MOVE = 0x00000008, // DSO address may not be relocated.
1404 RHF_SGI_ONLY = 0x00000010, // SGI specific features.
1405 RHF_GUARANTEE_INIT = 0x00000020, // Guarantee that .init will finish
1406 // executing before any non-init
1407 // code in DSO is called.
1408 RHF_DELTA_C_PLUS_PLUS = 0x00000040, // Contains Delta C++ code.
1409 RHF_GUARANTEE_START_INIT = 0x00000080, // Guarantee that .init will start
1410 // executing before any non-init
1411 // code in DSO is called.
1412 RHF_PIXIE = 0x00000100, // Generated by pixie.
1413 RHF_DEFAULT_DELAY_LOAD = 0x00000200, // Delay-load DSO by default.
1414 RHF_REQUICKSTART = 0x00000400, // Object may be requickstarted
1415 RHF_REQUICKSTARTED = 0x00000800, // Object has been requickstarted
1416 RHF_CORD = 0x00001000, // Generated by cord.
1417 RHF_NO_UNRES_UNDEF = 0x00002000, // Object contains no unresolved
1418 // undef symbols.
1419 RHF_RLD_ORDER_SAFE = 0x00004000 // Symbol table is in a safe order.
1420 };
1421
1422 // ElfXX_VerDef structure version (GNU versioning)
1423 enum { VER_DEF_NONE = 0, VER_DEF_CURRENT = 1 };
1424
1425 // VerDef Flags (ElfXX_VerDef::vd_flags)
1426 enum { VER_FLG_BASE = 0x1, VER_FLG_WEAK = 0x2, VER_FLG_INFO = 0x4 };
1427
1428 // Special constants for the version table. (SHT_GNU_versym/.gnu.version)
1429 enum {
1430 VER_NDX_LOCAL = 0, // Unversioned local symbol
1431 VER_NDX_GLOBAL = 1, // Unversioned global symbol
1432 VERSYM_VERSION = 0x7fff, // Version Index mask
1433 VERSYM_HIDDEN = 0x8000 // Hidden bit (non-default version)
1434 };
1435
1436 // ElfXX_VerNeed structure version (GNU versioning)
1437 enum { VER_NEED_NONE = 0, VER_NEED_CURRENT = 1 };
1438
1439 // SHT_NOTE section types.
1440
1441 // Generic note types.
1442 enum : unsigned {
1443 NT_VERSION = 1,
1444 NT_ARCH = 2,
1445 NT_GNU_BUILD_ATTRIBUTE_OPEN = 0x100,
1446 NT_GNU_BUILD_ATTRIBUTE_FUNC = 0x101,
1447 };
1448
1449 // Core note types.
1450 enum : unsigned {
1451 NT_PRSTATUS = 1,
1452 NT_FPREGSET = 2,
1453 NT_PRPSINFO = 3,
1454 NT_TASKSTRUCT = 4,
1455 NT_AUXV = 6,
1456 NT_PSTATUS = 10,
1457 NT_FPREGS = 12,
1458 NT_PSINFO = 13,
1459 NT_LWPSTATUS = 16,
1460 NT_LWPSINFO = 17,
1461 NT_WIN32PSTATUS = 18,
1462
1463 NT_PPC_VMX = 0x100,
1464 NT_PPC_VSX = 0x102,
1465 NT_PPC_TAR = 0x103,
1466 NT_PPC_PPR = 0x104,
1467 NT_PPC_DSCR = 0x105,
1468 NT_PPC_EBB = 0x106,
1469 NT_PPC_PMU = 0x107,
1470 NT_PPC_TM_CGPR = 0x108,
1471 NT_PPC_TM_CFPR = 0x109,
1472 NT_PPC_TM_CVMX = 0x10a,
1473 NT_PPC_TM_CVSX = 0x10b,
1474 NT_PPC_TM_SPR = 0x10c,
1475 NT_PPC_TM_CTAR = 0x10d,
1476 NT_PPC_TM_CPPR = 0x10e,
1477 NT_PPC_TM_CDSCR = 0x10f,
1478
1479 NT_386_TLS = 0x200,
1480 NT_386_IOPERM = 0x201,
1481 NT_X86_XSTATE = 0x202,
1482
1483 NT_S390_HIGH_GPRS = 0x300,
1484 NT_S390_TIMER = 0x301,
1485 NT_S390_TODCMP = 0x302,
1486 NT_S390_TODPREG = 0x303,
1487 NT_S390_CTRS = 0x304,
1488 NT_S390_PREFIX = 0x305,
1489 NT_S390_LAST_BREAK = 0x306,
1490 NT_S390_SYSTEM_CALL = 0x307,
1491 NT_S390_TDB = 0x308,
1492 NT_S390_VXRS_LOW = 0x309,
1493 NT_S390_VXRS_HIGH = 0x30a,
1494 NT_S390_GS_CB = 0x30b,
1495 NT_S390_GS_BC = 0x30c,
1496
1497 NT_ARM_VFP = 0x400,
1498 NT_ARM_TLS = 0x401,
1499 NT_ARM_HW_BREAK = 0x402,
1500 NT_ARM_HW_WATCH = 0x403,
1501 NT_ARM_SVE = 0x405,
1502 NT_ARM_PAC_MASK = 0x406,
1503
1504 NT_FILE = 0x46494c45,
1505 NT_PRXFPREG = 0x46e62b7f,
1506 NT_SIGINFO = 0x53494749,
1507 };
1508
1509 // LLVM-specific notes.
1510 enum {
1511 NT_LLVM_HWASAN_GLOBALS = 3,
1512 };
1513
1514 // GNU note types.
1515 enum {
1516 NT_GNU_ABI_TAG = 1,
1517 NT_GNU_HWCAP = 2,
1518 NT_GNU_BUILD_ID = 3,
1519 NT_GNU_GOLD_VERSION = 4,
1520 NT_GNU_PROPERTY_TYPE_0 = 5,
1521 };
1522
1523 // Property types used in GNU_PROPERTY_TYPE_0 notes.
1524 enum : unsigned {
1525 GNU_PROPERTY_STACK_SIZE = 1,
1526 GNU_PROPERTY_NO_COPY_ON_PROTECTED = 2,
1527 GNU_PROPERTY_AARCH64_FEATURE_1_AND = 0xc0000000,
1528 GNU_PROPERTY_X86_FEATURE_1_AND = 0xc0000002,
1529
1530 GNU_PROPERTY_X86_UINT32_OR_LO = 0xc0008000,
1531 GNU_PROPERTY_X86_FEATURE_2_NEEDED = GNU_PROPERTY_X86_UINT32_OR_LO + 1,
1532 GNU_PROPERTY_X86_ISA_1_NEEDED = GNU_PROPERTY_X86_UINT32_OR_LO + 2,
1533
1534 GNU_PROPERTY_X86_UINT32_OR_AND_LO = 0xc0010000,
1535 GNU_PROPERTY_X86_FEATURE_2_USED = GNU_PROPERTY_X86_UINT32_OR_AND_LO + 1,
1536 GNU_PROPERTY_X86_ISA_1_USED = GNU_PROPERTY_X86_UINT32_OR_AND_LO + 2,
1537 };
1538
1539 // aarch64 processor feature bits.
1540 enum : unsigned {
1541 GNU_PROPERTY_AARCH64_FEATURE_1_BTI = 1 << 0,
1542 GNU_PROPERTY_AARCH64_FEATURE_1_PAC = 1 << 1,
1543 };
1544
1545 // x86 processor feature bits.
1546 enum : unsigned {
1547 GNU_PROPERTY_X86_FEATURE_1_IBT = 1 << 0,
1548 GNU_PROPERTY_X86_FEATURE_1_SHSTK = 1 << 1,
1549
1550 GNU_PROPERTY_X86_FEATURE_2_X86 = 1 << 0,
1551 GNU_PROPERTY_X86_FEATURE_2_X87 = 1 << 1,
1552 GNU_PROPERTY_X86_FEATURE_2_MMX = 1 << 2,
1553 GNU_PROPERTY_X86_FEATURE_2_XMM = 1 << 3,
1554 GNU_PROPERTY_X86_FEATURE_2_YMM = 1 << 4,
1555 GNU_PROPERTY_X86_FEATURE_2_ZMM = 1 << 5,
1556 GNU_PROPERTY_X86_FEATURE_2_FXSR = 1 << 6,
1557 GNU_PROPERTY_X86_FEATURE_2_XSAVE = 1 << 7,
1558 GNU_PROPERTY_X86_FEATURE_2_XSAVEOPT = 1 << 8,
1559 GNU_PROPERTY_X86_FEATURE_2_XSAVEC = 1 << 9,
1560
1561 GNU_PROPERTY_X86_ISA_1_BASELINE = 1 << 0,
1562 GNU_PROPERTY_X86_ISA_1_V2 = 1 << 1,
1563 GNU_PROPERTY_X86_ISA_1_V3 = 1 << 2,
1564 GNU_PROPERTY_X86_ISA_1_V4 = 1 << 3,
1565 };
1566
1567 // FreeBSD note types.
1568 enum {
1569 NT_FREEBSD_ABI_TAG = 1,
1570 NT_FREEBSD_NOINIT_TAG = 2,
1571 NT_FREEBSD_ARCH_TAG = 3,
1572 NT_FREEBSD_FEATURE_CTL = 4,
1573 };
1574
1575 // NT_FREEBSD_FEATURE_CTL values (see FreeBSD's sys/sys/elf_common.h).
1576 enum {
1577 NT_FREEBSD_FCTL_ASLR_DISABLE = 0x00000001,
1578 NT_FREEBSD_FCTL_PROTMAX_DISABLE = 0x00000002,
1579 NT_FREEBSD_FCTL_STKGAP_DISABLE = 0x00000004,
1580 NT_FREEBSD_FCTL_WXNEEDED = 0x00000008,
1581 NT_FREEBSD_FCTL_LA48 = 0x00000010,
1582 NT_FREEBSD_FCTL_ASG_DISABLE = 0x00000020,
1583 };
1584
1585 // FreeBSD core note types.
1586 enum {
1587 NT_FREEBSD_THRMISC = 7,
1588 NT_FREEBSD_PROCSTAT_PROC = 8,
1589 NT_FREEBSD_PROCSTAT_FILES = 9,
1590 NT_FREEBSD_PROCSTAT_VMMAP = 10,
1591 NT_FREEBSD_PROCSTAT_GROUPS = 11,
1592 NT_FREEBSD_PROCSTAT_UMASK = 12,
1593 NT_FREEBSD_PROCSTAT_RLIMIT = 13,
1594 NT_FREEBSD_PROCSTAT_OSREL = 14,
1595 NT_FREEBSD_PROCSTAT_PSSTRINGS = 15,
1596 NT_FREEBSD_PROCSTAT_AUXV = 16,
1597 };
1598
1599 // AMDGPU-specific section indices.
1600 enum {
1601 SHN_AMDGPU_LDS = 0xff00, // Variable in LDS; symbol encoded like SHN_COMMON
1602 };
1603
1604 // AMD vendor specific notes. (Code Object V2)
1605 enum {
1606 NT_AMD_HSA_CODE_OBJECT_VERSION = 1,
1607 NT_AMD_HSA_HSAIL = 2,
1608 NT_AMD_HSA_ISA_VERSION = 3,
1609 // Note types with values between 4 and 9 (inclusive) are reserved.
1610 NT_AMD_HSA_METADATA = 10,
1611 NT_AMD_HSA_ISA_NAME = 11,
1612 NT_AMD_PAL_METADATA = 12
1613 };
1614
1615 // AMDGPU vendor specific notes. (Code Object V3)
1616 enum {
1617 // Note types with values between 0 and 31 (inclusive) are reserved.
1618 NT_AMDGPU_METADATA = 32
1619 };
1620
1621 enum {
1622 GNU_ABI_TAG_LINUX = 0,
1623 GNU_ABI_TAG_HURD = 1,
1624 GNU_ABI_TAG_SOLARIS = 2,
1625 GNU_ABI_TAG_FREEBSD = 3,
1626 GNU_ABI_TAG_NETBSD = 4,
1627 GNU_ABI_TAG_SYLLABLE = 5,
1628 GNU_ABI_TAG_NACL = 6,
1629 };
1630
1631 constexpr const char *ELF_NOTE_GNU = "GNU";
1632
1633 // Android packed relocation group flags.
1634 enum {
1635 RELOCATION_GROUPED_BY_INFO_FLAG = 1,
1636 RELOCATION_GROUPED_BY_OFFSET_DELTA_FLAG = 2,
1637 RELOCATION_GROUPED_BY_ADDEND_FLAG = 4,
1638 RELOCATION_GROUP_HAS_ADDEND_FLAG = 8,
1639 };
1640
1641 // Compressed section header for ELF32.
1642 struct Elf32_Chdr {
1643 Elf32_Word ch_type;
1644 Elf32_Word ch_size;
1645 Elf32_Word ch_addralign;
1646 };
1647
1648 // Compressed section header for ELF64.
1649 struct Elf64_Chdr {
1650 Elf64_Word ch_type;
1651 Elf64_Word ch_reserved;
1652 Elf64_Xword ch_size;
1653 Elf64_Xword ch_addralign;
1654 };
1655
1656 // Note header for ELF32.
1657 struct Elf32_Nhdr {
1658 Elf32_Word n_namesz;
1659 Elf32_Word n_descsz;
1660 Elf32_Word n_type;
1661 };
1662
1663 // Note header for ELF64.
1664 struct Elf64_Nhdr {
1665 Elf64_Word n_namesz;
1666 Elf64_Word n_descsz;
1667 Elf64_Word n_type;
1668 };
1669
1670 // Legal values for ch_type field of compressed section header.
1671 enum {
1672 ELFCOMPRESS_ZLIB = 1, // ZLIB/DEFLATE algorithm.
1673 ELFCOMPRESS_LOOS = 0x60000000, // Start of OS-specific.
1674 ELFCOMPRESS_HIOS = 0x6fffffff, // End of OS-specific.
1675 ELFCOMPRESS_LOPROC = 0x70000000, // Start of processor-specific.
1676 ELFCOMPRESS_HIPROC = 0x7fffffff // End of processor-specific.
1677 };
1678
1679 /// Convert an architecture name into ELF's e_machine value.
1680 uint16_t convertArchNameToEMachine(StringRef Arch);
1681
1682 /// Convert an ELF's e_machine value into an architecture name.
1683 StringRef convertEMachineToArchName(uint16_t EMachine);
1684
1685 } // end namespace ELF
1686 } // end namespace llvm
1687
1688 #endif // LLVM_BINARYFORMAT_ELF_H
1689