1 //===- ELFTypes.h - Endian specific types for ELF ---------------*- C++ -*-===//
3 // The LLVM Compiler Infrastructure
5 // This file is distributed under the University of Illinois Open Source
6 // License. See LICENSE.TXT for details.
8 //===----------------------------------------------------------------------===//
10 #ifndef LLVM_OBJECT_ELFTYPES_H
11 #define LLVM_OBJECT_ELFTYPES_H
13 #include "llvm/ADT/ArrayRef.h"
14 #include "llvm/Object/Error.h"
15 #include "llvm/Support/ELF.h"
16 #include "llvm/Support/Endian.h"
17 #include "llvm/Support/ErrorOr.h"
22 using support::endianness;
24 template <class ELFT> struct Elf_Ehdr_Impl;
25 template <class ELFT> struct Elf_Shdr_Impl;
26 template <class ELFT> struct Elf_Sym_Impl;
27 template <class ELFT> struct Elf_Dyn_Impl;
28 template <class ELFT> struct Elf_Phdr_Impl;
29 template <class ELFT, bool isRela> struct Elf_Rel_Impl;
30 template <class ELFT> struct Elf_Verdef_Impl;
31 template <class ELFT> struct Elf_Verdaux_Impl;
32 template <class ELFT> struct Elf_Verneed_Impl;
33 template <class ELFT> struct Elf_Vernaux_Impl;
34 template <class ELFT> struct Elf_Versym_Impl;
35 template <class ELFT> struct Elf_Hash_Impl;
36 template <class ELFT> struct Elf_GnuHash_Impl;
37 template <class ELFT> struct Elf_Chdr_Impl;
39 template <endianness E, bool Is64> struct ELFType {
41 template <typename Ty>
42 using packed = support::detail::packed_endian_specific_integral<Ty, E, 2>;
45 static const endianness TargetEndianness = E;
46 static const bool Is64Bits = Is64;
48 typedef typename std::conditional<Is64, uint64_t, uint32_t>::type uint;
49 typedef Elf_Ehdr_Impl<ELFType<E, Is64>> Ehdr;
50 typedef Elf_Shdr_Impl<ELFType<E, Is64>> Shdr;
51 typedef Elf_Sym_Impl<ELFType<E, Is64>> Sym;
52 typedef Elf_Dyn_Impl<ELFType<E, Is64>> Dyn;
53 typedef Elf_Phdr_Impl<ELFType<E, Is64>> Phdr;
54 typedef Elf_Rel_Impl<ELFType<E, Is64>, false> Rel;
55 typedef Elf_Rel_Impl<ELFType<E, Is64>, true> Rela;
56 typedef Elf_Verdef_Impl<ELFType<E, Is64>> Verdef;
57 typedef Elf_Verdaux_Impl<ELFType<E, Is64>> Verdaux;
58 typedef Elf_Verneed_Impl<ELFType<E, Is64>> Verneed;
59 typedef Elf_Vernaux_Impl<ELFType<E, Is64>> Vernaux;
60 typedef Elf_Versym_Impl<ELFType<E, Is64>> Versym;
61 typedef Elf_Hash_Impl<ELFType<E, Is64>> Hash;
62 typedef Elf_GnuHash_Impl<ELFType<E, Is64>> GnuHash;
63 typedef Elf_Chdr_Impl<ELFType<E, Is64>> Chdr;
64 typedef ArrayRef<Dyn> DynRange;
65 typedef ArrayRef<Shdr> ShdrRange;
66 typedef ArrayRef<Sym> SymRange;
67 typedef ArrayRef<Rel> RelRange;
68 typedef ArrayRef<Rela> RelaRange;
69 typedef ArrayRef<Phdr> PhdrRange;
71 typedef packed<uint16_t> Half;
72 typedef packed<uint32_t> Word;
73 typedef packed<int32_t> Sword;
74 typedef packed<uint64_t> Xword;
75 typedef packed<int64_t> Sxword;
76 typedef packed<uint> Addr;
77 typedef packed<uint> Off;
80 typedef ELFType<support::little, false> ELF32LE;
81 typedef ELFType<support::big, false> ELF32BE;
82 typedef ELFType<support::little, true> ELF64LE;
83 typedef ELFType<support::big, true> ELF64BE;
85 // Use an alignment of 2 for the typedefs since that is the worst case for
86 // ELF files in archives.
88 // Templates to choose Elf_Addr and Elf_Off depending on is64Bits.
89 template <endianness target_endianness> struct ELFDataTypeTypedefHelperCommon {
90 typedef support::detail::packed_endian_specific_integral<
91 uint16_t, target_endianness, 2> Elf_Half;
92 typedef support::detail::packed_endian_specific_integral<
93 uint32_t, target_endianness, 2> Elf_Word;
94 typedef support::detail::packed_endian_specific_integral<
95 int32_t, target_endianness, 2> Elf_Sword;
96 typedef support::detail::packed_endian_specific_integral<
97 uint64_t, target_endianness, 2> Elf_Xword;
98 typedef support::detail::packed_endian_specific_integral<
99 int64_t, target_endianness, 2> Elf_Sxword;
102 template <class ELFT> struct ELFDataTypeTypedefHelper;
105 template <endianness TargetEndianness>
106 struct ELFDataTypeTypedefHelper<ELFType<TargetEndianness, false>>
107 : ELFDataTypeTypedefHelperCommon<TargetEndianness> {
108 typedef uint32_t value_type;
109 typedef support::detail::packed_endian_specific_integral<
110 value_type, TargetEndianness, 2> Elf_Addr;
111 typedef support::detail::packed_endian_specific_integral<
112 value_type, TargetEndianness, 2> Elf_Off;
116 template <endianness TargetEndianness>
117 struct ELFDataTypeTypedefHelper<ELFType<TargetEndianness, true>>
118 : ELFDataTypeTypedefHelperCommon<TargetEndianness> {
119 typedef uint64_t value_type;
120 typedef support::detail::packed_endian_specific_integral<
121 value_type, TargetEndianness, 2> Elf_Addr;
122 typedef support::detail::packed_endian_specific_integral<
123 value_type, TargetEndianness, 2> Elf_Off;
126 // I really don't like doing this, but the alternative is copypasta.
127 #define LLVM_ELF_IMPORT_TYPES(E, W) \
128 typedef typename ELFDataTypeTypedefHelper<ELFType<E, W>>::Elf_Addr Elf_Addr; \
129 typedef typename ELFDataTypeTypedefHelper<ELFType<E, W>>::Elf_Off Elf_Off; \
130 typedef typename ELFDataTypeTypedefHelper<ELFType<E, W>>::Elf_Half Elf_Half; \
131 typedef typename ELFDataTypeTypedefHelper<ELFType<E, W>>::Elf_Word Elf_Word; \
133 typename ELFDataTypeTypedefHelper<ELFType<E, W>>::Elf_Sword Elf_Sword; \
135 typename ELFDataTypeTypedefHelper<ELFType<E, W>>::Elf_Xword Elf_Xword; \
137 typename ELFDataTypeTypedefHelper<ELFType<E, W>>::Elf_Sxword Elf_Sxword;
139 #define LLVM_ELF_IMPORT_TYPES_ELFT(ELFT) \
140 LLVM_ELF_IMPORT_TYPES(ELFT::TargetEndianness, ELFT::Is64Bits)
143 template <class ELFT> struct Elf_Shdr_Base;
145 template <endianness TargetEndianness>
146 struct Elf_Shdr_Base<ELFType<TargetEndianness, false>> {
147 LLVM_ELF_IMPORT_TYPES(TargetEndianness, false)
148 Elf_Word sh_name; // Section name (index into string table)
149 Elf_Word sh_type; // Section type (SHT_*)
150 Elf_Word sh_flags; // Section flags (SHF_*)
151 Elf_Addr sh_addr; // Address where section is to be loaded
152 Elf_Off sh_offset; // File offset of section data, in bytes
153 Elf_Word sh_size; // Size of section, in bytes
154 Elf_Word sh_link; // Section type-specific header table index link
155 Elf_Word sh_info; // Section type-specific extra information
156 Elf_Word sh_addralign; // Section address alignment
157 Elf_Word sh_entsize; // Size of records contained within the section
160 template <endianness TargetEndianness>
161 struct Elf_Shdr_Base<ELFType<TargetEndianness, true>> {
162 LLVM_ELF_IMPORT_TYPES(TargetEndianness, true)
163 Elf_Word sh_name; // Section name (index into string table)
164 Elf_Word sh_type; // Section type (SHT_*)
165 Elf_Xword sh_flags; // Section flags (SHF_*)
166 Elf_Addr sh_addr; // Address where section is to be loaded
167 Elf_Off sh_offset; // File offset of section data, in bytes
168 Elf_Xword sh_size; // Size of section, in bytes
169 Elf_Word sh_link; // Section type-specific header table index link
170 Elf_Word sh_info; // Section type-specific extra information
171 Elf_Xword sh_addralign; // Section address alignment
172 Elf_Xword sh_entsize; // Size of records contained within the section
175 template <class ELFT>
176 struct Elf_Shdr_Impl : Elf_Shdr_Base<ELFT> {
177 using Elf_Shdr_Base<ELFT>::sh_entsize;
178 using Elf_Shdr_Base<ELFT>::sh_size;
180 /// @brief Get the number of entities this section contains if it has any.
181 unsigned getEntityCount() const {
184 return sh_size / sh_entsize;
188 template <class ELFT> struct Elf_Sym_Base;
190 template <endianness TargetEndianness>
191 struct Elf_Sym_Base<ELFType<TargetEndianness, false>> {
192 LLVM_ELF_IMPORT_TYPES(TargetEndianness, false)
193 Elf_Word st_name; // Symbol name (index into string table)
194 Elf_Addr st_value; // Value or address associated with the symbol
195 Elf_Word st_size; // Size of the symbol
196 unsigned char st_info; // Symbol's type and binding attributes
197 unsigned char st_other; // Must be zero; reserved
198 Elf_Half st_shndx; // Which section (header table index) it's defined in
201 template <endianness TargetEndianness>
202 struct Elf_Sym_Base<ELFType<TargetEndianness, true>> {
203 LLVM_ELF_IMPORT_TYPES(TargetEndianness, true)
204 Elf_Word st_name; // Symbol name (index into string table)
205 unsigned char st_info; // Symbol's type and binding attributes
206 unsigned char st_other; // Must be zero; reserved
207 Elf_Half st_shndx; // Which section (header table index) it's defined in
208 Elf_Addr st_value; // Value or address associated with the symbol
209 Elf_Xword st_size; // Size of the symbol
212 template <class ELFT>
213 struct Elf_Sym_Impl : Elf_Sym_Base<ELFT> {
214 using Elf_Sym_Base<ELFT>::st_info;
215 using Elf_Sym_Base<ELFT>::st_shndx;
216 using Elf_Sym_Base<ELFT>::st_other;
217 using Elf_Sym_Base<ELFT>::st_value;
219 // These accessors and mutators correspond to the ELF32_ST_BIND,
220 // ELF32_ST_TYPE, and ELF32_ST_INFO macros defined in the ELF specification:
221 unsigned char getBinding() const { return st_info >> 4; }
222 unsigned char getType() const { return st_info & 0x0f; }
223 uint64_t getValue() const { return st_value; }
224 void setBinding(unsigned char b) { setBindingAndType(b, getType()); }
225 void setType(unsigned char t) { setBindingAndType(getBinding(), t); }
226 void setBindingAndType(unsigned char b, unsigned char t) {
227 st_info = (b << 4) + (t & 0x0f);
230 /// Access to the STV_xxx flag stored in the first two bits of st_other.
235 unsigned char getVisibility() const { return st_other & 0x3; }
236 void setVisibility(unsigned char v) {
237 assert(v < 4 && "Invalid value for visibility");
238 st_other = (st_other & ~0x3) | v;
241 bool isAbsolute() const { return st_shndx == ELF::SHN_ABS; }
242 bool isCommon() const {
243 return getType() == ELF::STT_COMMON || st_shndx == ELF::SHN_COMMON;
245 bool isDefined() const { return !isUndefined(); }
246 bool isProcessorSpecific() const {
247 return st_shndx >= ELF::SHN_LOPROC && st_shndx <= ELF::SHN_HIPROC;
249 bool isOSSpecific() const {
250 return st_shndx >= ELF::SHN_LOOS && st_shndx <= ELF::SHN_HIOS;
252 bool isReserved() const {
253 // ELF::SHN_HIRESERVE is 0xffff so st_shndx <= ELF::SHN_HIRESERVE is always
254 // true and some compilers warn about it.
255 return st_shndx >= ELF::SHN_LORESERVE;
257 bool isUndefined() const { return st_shndx == ELF::SHN_UNDEF; }
258 bool isExternal() const {
259 return getBinding() != ELF::STB_LOCAL;
262 Expected<StringRef> getName(StringRef StrTab) const;
265 template <class ELFT>
266 Expected<StringRef> Elf_Sym_Impl<ELFT>::getName(StringRef StrTab) const {
267 uint32_t Offset = this->st_name;
268 if (Offset >= StrTab.size())
269 return errorCodeToError(object_error::parse_failed);
270 return StringRef(StrTab.data() + Offset);
273 /// Elf_Versym: This is the structure of entries in the SHT_GNU_versym section
274 /// (.gnu.version). This structure is identical for ELF32 and ELF64.
275 template <class ELFT>
276 struct Elf_Versym_Impl {
277 LLVM_ELF_IMPORT_TYPES_ELFT(ELFT)
278 Elf_Half vs_index; // Version index with flags (e.g. VERSYM_HIDDEN)
281 template <class ELFT> struct Elf_Verdaux_Impl;
283 /// Elf_Verdef: This is the structure of entries in the SHT_GNU_verdef section
284 /// (.gnu.version_d). This structure is identical for ELF32 and ELF64.
285 template <class ELFT>
286 struct Elf_Verdef_Impl {
287 LLVM_ELF_IMPORT_TYPES_ELFT(ELFT)
288 typedef Elf_Verdaux_Impl<ELFT> Elf_Verdaux;
289 Elf_Half vd_version; // Version of this structure (e.g. VER_DEF_CURRENT)
290 Elf_Half vd_flags; // Bitwise flags (VER_DEF_*)
291 Elf_Half vd_ndx; // Version index, used in .gnu.version entries
292 Elf_Half vd_cnt; // Number of Verdaux entries
293 Elf_Word vd_hash; // Hash of name
294 Elf_Word vd_aux; // Offset to the first Verdaux entry (in bytes)
295 Elf_Word vd_next; // Offset to the next Verdef entry (in bytes)
297 /// Get the first Verdaux entry for this Verdef.
298 const Elf_Verdaux *getAux() const {
299 return reinterpret_cast<const Elf_Verdaux *>((const char *)this + vd_aux);
303 /// Elf_Verdaux: This is the structure of auxiliary data in the SHT_GNU_verdef
304 /// section (.gnu.version_d). This structure is identical for ELF32 and ELF64.
305 template <class ELFT>
306 struct Elf_Verdaux_Impl {
307 LLVM_ELF_IMPORT_TYPES_ELFT(ELFT)
308 Elf_Word vda_name; // Version name (offset in string table)
309 Elf_Word vda_next; // Offset to next Verdaux entry (in bytes)
312 /// Elf_Verneed: This is the structure of entries in the SHT_GNU_verneed
313 /// section (.gnu.version_r). This structure is identical for ELF32 and ELF64.
314 template <class ELFT>
315 struct Elf_Verneed_Impl {
316 LLVM_ELF_IMPORT_TYPES_ELFT(ELFT)
317 Elf_Half vn_version; // Version of this structure (e.g. VER_NEED_CURRENT)
318 Elf_Half vn_cnt; // Number of associated Vernaux entries
319 Elf_Word vn_file; // Library name (string table offset)
320 Elf_Word vn_aux; // Offset to first Vernaux entry (in bytes)
321 Elf_Word vn_next; // Offset to next Verneed entry (in bytes)
324 /// Elf_Vernaux: This is the structure of auxiliary data in SHT_GNU_verneed
325 /// section (.gnu.version_r). This structure is identical for ELF32 and ELF64.
326 template <class ELFT>
327 struct Elf_Vernaux_Impl {
328 LLVM_ELF_IMPORT_TYPES_ELFT(ELFT)
329 Elf_Word vna_hash; // Hash of dependency name
330 Elf_Half vna_flags; // Bitwise Flags (VER_FLAG_*)
331 Elf_Half vna_other; // Version index, used in .gnu.version entries
332 Elf_Word vna_name; // Dependency name
333 Elf_Word vna_next; // Offset to next Vernaux entry (in bytes)
336 /// Elf_Dyn_Base: This structure matches the form of entries in the dynamic
337 /// table section (.dynamic) look like.
338 template <class ELFT> struct Elf_Dyn_Base;
340 template <endianness TargetEndianness>
341 struct Elf_Dyn_Base<ELFType<TargetEndianness, false>> {
342 LLVM_ELF_IMPORT_TYPES(TargetEndianness, false)
350 template <endianness TargetEndianness>
351 struct Elf_Dyn_Base<ELFType<TargetEndianness, true>> {
352 LLVM_ELF_IMPORT_TYPES(TargetEndianness, true)
360 /// Elf_Dyn_Impl: This inherits from Elf_Dyn_Base, adding getters.
361 template <class ELFT>
362 struct Elf_Dyn_Impl : Elf_Dyn_Base<ELFT> {
363 using Elf_Dyn_Base<ELFT>::d_tag;
364 using Elf_Dyn_Base<ELFT>::d_un;
365 typedef typename std::conditional<ELFT::Is64Bits,
366 int64_t, int32_t>::type intX_t;
367 typedef typename std::conditional<ELFT::Is64Bits,
368 uint64_t, uint32_t>::type uintX_t;
369 intX_t getTag() const { return d_tag; }
370 uintX_t getVal() const { return d_un.d_val; }
371 uintX_t getPtr() const { return d_un.d_ptr; }
374 template <endianness TargetEndianness>
375 struct Elf_Rel_Impl<ELFType<TargetEndianness, false>, false> {
376 LLVM_ELF_IMPORT_TYPES(TargetEndianness, false)
377 static const bool IsRela = false;
378 Elf_Addr r_offset; // Location (file byte offset, or program virtual addr)
379 Elf_Word r_info; // Symbol table index and type of relocation to apply
381 uint32_t getRInfo(bool isMips64EL) const {
385 void setRInfo(uint32_t R, bool IsMips64EL) {
390 // These accessors and mutators correspond to the ELF32_R_SYM, ELF32_R_TYPE,
391 // and ELF32_R_INFO macros defined in the ELF specification:
392 uint32_t getSymbol(bool isMips64EL) const {
393 return this->getRInfo(isMips64EL) >> 8;
395 unsigned char getType(bool isMips64EL) const {
396 return (unsigned char)(this->getRInfo(isMips64EL) & 0x0ff);
398 void setSymbol(uint32_t s, bool IsMips64EL) {
399 setSymbolAndType(s, getType(), IsMips64EL);
401 void setType(unsigned char t, bool IsMips64EL) {
402 setSymbolAndType(getSymbol(), t, IsMips64EL);
404 void setSymbolAndType(uint32_t s, unsigned char t, bool IsMips64EL) {
405 this->setRInfo((s << 8) + t, IsMips64EL);
409 template <endianness TargetEndianness>
410 struct Elf_Rel_Impl<ELFType<TargetEndianness, false>, true>
411 : public Elf_Rel_Impl<ELFType<TargetEndianness, false>, false> {
412 LLVM_ELF_IMPORT_TYPES(TargetEndianness, false)
413 static const bool IsRela = true;
414 Elf_Sword r_addend; // Compute value for relocatable field by adding this
417 template <endianness TargetEndianness>
418 struct Elf_Rel_Impl<ELFType<TargetEndianness, true>, false> {
419 LLVM_ELF_IMPORT_TYPES(TargetEndianness, true)
420 static const bool IsRela = false;
421 Elf_Addr r_offset; // Location (file byte offset, or program virtual addr)
422 Elf_Xword r_info; // Symbol table index and type of relocation to apply
424 uint64_t getRInfo(bool isMips64EL) const {
428 // Mips64 little endian has a "special" encoding of r_info. Instead of one
429 // 64 bit little endian number, it is a little endian 32 bit number followed
430 // by a 32 bit big endian number.
431 return (t << 32) | ((t >> 8) & 0xff000000) | ((t >> 24) & 0x00ff0000) |
432 ((t >> 40) & 0x0000ff00) | ((t >> 56) & 0x000000ff);
434 void setRInfo(uint64_t R, bool IsMips64EL) {
436 r_info = (R >> 32) | ((R & 0xff000000) << 8) | ((R & 0x00ff0000) << 24) |
437 ((R & 0x0000ff00) << 40) | ((R & 0x000000ff) << 56);
442 // These accessors and mutators correspond to the ELF64_R_SYM, ELF64_R_TYPE,
443 // and ELF64_R_INFO macros defined in the ELF specification:
444 uint32_t getSymbol(bool isMips64EL) const {
445 return (uint32_t)(this->getRInfo(isMips64EL) >> 32);
447 uint32_t getType(bool isMips64EL) const {
448 return (uint32_t)(this->getRInfo(isMips64EL) & 0xffffffffL);
450 void setSymbol(uint32_t s, bool IsMips64EL) {
451 setSymbolAndType(s, getType(), IsMips64EL);
453 void setType(uint32_t t, bool IsMips64EL) {
454 setSymbolAndType(getSymbol(), t, IsMips64EL);
456 void setSymbolAndType(uint32_t s, uint32_t t, bool IsMips64EL) {
457 this->setRInfo(((uint64_t)s << 32) + (t & 0xffffffffL), IsMips64EL);
461 template <endianness TargetEndianness>
462 struct Elf_Rel_Impl<ELFType<TargetEndianness, true>, true>
463 : public Elf_Rel_Impl<ELFType<TargetEndianness, true>, false> {
464 LLVM_ELF_IMPORT_TYPES(TargetEndianness, true)
465 static const bool IsRela = true;
466 Elf_Sxword r_addend; // Compute value for relocatable field by adding this.
469 template <class ELFT>
470 struct Elf_Ehdr_Impl {
471 LLVM_ELF_IMPORT_TYPES_ELFT(ELFT)
472 unsigned char e_ident[ELF::EI_NIDENT]; // ELF Identification bytes
473 Elf_Half e_type; // Type of file (see ET_*)
474 Elf_Half e_machine; // Required architecture for this file (see EM_*)
475 Elf_Word e_version; // Must be equal to 1
476 Elf_Addr e_entry; // Address to jump to in order to start program
477 Elf_Off e_phoff; // Program header table's file offset, in bytes
478 Elf_Off e_shoff; // Section header table's file offset, in bytes
479 Elf_Word e_flags; // Processor-specific flags
480 Elf_Half e_ehsize; // Size of ELF header, in bytes
481 Elf_Half e_phentsize; // Size of an entry in the program header table
482 Elf_Half e_phnum; // Number of entries in the program header table
483 Elf_Half e_shentsize; // Size of an entry in the section header table
484 Elf_Half e_shnum; // Number of entries in the section header table
485 Elf_Half e_shstrndx; // Section header table index of section name
487 bool checkMagic() const {
488 return (memcmp(e_ident, ELF::ElfMagic, strlen(ELF::ElfMagic))) == 0;
490 unsigned char getFileClass() const { return e_ident[ELF::EI_CLASS]; }
491 unsigned char getDataEncoding() const { return e_ident[ELF::EI_DATA]; }
494 template <class ELFT> struct Elf_Phdr_Impl;
496 template <endianness TargetEndianness>
497 struct Elf_Phdr_Impl<ELFType<TargetEndianness, false>> {
498 LLVM_ELF_IMPORT_TYPES(TargetEndianness, false)
499 Elf_Word p_type; // Type of segment
500 Elf_Off p_offset; // FileOffset where segment is located, in bytes
501 Elf_Addr p_vaddr; // Virtual Address of beginning of segment
502 Elf_Addr p_paddr; // Physical address of beginning of segment (OS-specific)
503 Elf_Word p_filesz; // Num. of bytes in file image of segment (may be zero)
504 Elf_Word p_memsz; // Num. of bytes in mem image of segment (may be zero)
505 Elf_Word p_flags; // Segment flags
506 Elf_Word p_align; // Segment alignment constraint
509 template <endianness TargetEndianness>
510 struct Elf_Phdr_Impl<ELFType<TargetEndianness, true>> {
511 LLVM_ELF_IMPORT_TYPES(TargetEndianness, true)
512 Elf_Word p_type; // Type of segment
513 Elf_Word p_flags; // Segment flags
514 Elf_Off p_offset; // FileOffset where segment is located, in bytes
515 Elf_Addr p_vaddr; // Virtual Address of beginning of segment
516 Elf_Addr p_paddr; // Physical address of beginning of segment (OS-specific)
517 Elf_Xword p_filesz; // Num. of bytes in file image of segment (may be zero)
518 Elf_Xword p_memsz; // Num. of bytes in mem image of segment (may be zero)
519 Elf_Xword p_align; // Segment alignment constraint
522 // ELFT needed for endianess.
523 template <class ELFT>
524 struct Elf_Hash_Impl {
525 LLVM_ELF_IMPORT_TYPES_ELFT(ELFT)
529 ArrayRef<Elf_Word> buckets() const {
530 return ArrayRef<Elf_Word>(&nbucket + 2, &nbucket + 2 + nbucket);
533 ArrayRef<Elf_Word> chains() const {
534 return ArrayRef<Elf_Word>(&nbucket + 2 + nbucket,
535 &nbucket + 2 + nbucket + nchain);
540 template <class ELFT>
541 struct Elf_GnuHash_Impl {
542 LLVM_ELF_IMPORT_TYPES_ELFT(ELFT)
548 ArrayRef<Elf_Off> filter() const {
549 return ArrayRef<Elf_Off>(reinterpret_cast<const Elf_Off *>(&shift2 + 1),
553 ArrayRef<Elf_Word> buckets() const {
554 return ArrayRef<Elf_Word>(
555 reinterpret_cast<const Elf_Word *>(filter().end()), nbuckets);
558 ArrayRef<Elf_Word> values(unsigned DynamicSymCount) const {
559 return ArrayRef<Elf_Word>(buckets().end(), DynamicSymCount - symndx);
563 // Compressed section headers.
564 // http://www.sco.com/developers/gabi/latest/ch4.sheader.html#compression_header
565 template <endianness TargetEndianness>
566 struct Elf_Chdr_Impl<ELFType<TargetEndianness, false>> {
567 LLVM_ELF_IMPORT_TYPES(TargetEndianness, false)
570 Elf_Word ch_addralign;
573 template <endianness TargetEndianness>
574 struct Elf_Chdr_Impl<ELFType<TargetEndianness, true>> {
575 LLVM_ELF_IMPORT_TYPES(TargetEndianness, true)
577 Elf_Word ch_reserved;
579 Elf_Xword ch_addralign;
582 // MIPS .reginfo section
583 template <class ELFT>
584 struct Elf_Mips_RegInfo;
586 template <llvm::support::endianness TargetEndianness>
587 struct Elf_Mips_RegInfo<ELFType<TargetEndianness, false>> {
588 LLVM_ELF_IMPORT_TYPES(TargetEndianness, false)
589 Elf_Word ri_gprmask; // bit-mask of used general registers
590 Elf_Word ri_cprmask[4]; // bit-mask of used co-processor registers
591 Elf_Addr ri_gp_value; // gp register value
594 template <llvm::support::endianness TargetEndianness>
595 struct Elf_Mips_RegInfo<ELFType<TargetEndianness, true>> {
596 LLVM_ELF_IMPORT_TYPES(TargetEndianness, true)
597 Elf_Word ri_gprmask; // bit-mask of used general registers
598 Elf_Word ri_pad; // unused padding field
599 Elf_Word ri_cprmask[4]; // bit-mask of used co-processor registers
600 Elf_Addr ri_gp_value; // gp register value
603 // .MIPS.options section
604 template <class ELFT> struct Elf_Mips_Options {
605 LLVM_ELF_IMPORT_TYPES_ELFT(ELFT)
606 uint8_t kind; // Determines interpretation of variable part of descriptor
607 uint8_t size; // Byte size of descriptor, including this header
608 Elf_Half section; // Section header index of section affected,
609 // or 0 for global options
610 Elf_Word info; // Kind-specific information
612 const Elf_Mips_RegInfo<ELFT> &getRegInfo() const {
613 assert(kind == llvm::ELF::ODK_REGINFO);
614 return *reinterpret_cast<const Elf_Mips_RegInfo<ELFT> *>(
615 (const uint8_t *)this + sizeof(Elf_Mips_Options));
619 // .MIPS.abiflags section content
620 template <class ELFT> struct Elf_Mips_ABIFlags {
621 LLVM_ELF_IMPORT_TYPES_ELFT(ELFT)
622 Elf_Half version; // Version of the structure
623 uint8_t isa_level; // ISA level: 1-5, 32, and 64
624 uint8_t isa_rev; // ISA revision (0 for MIPS I - MIPS V)
625 uint8_t gpr_size; // General purpose registers size
626 uint8_t cpr1_size; // Co-processor 1 registers size
627 uint8_t cpr2_size; // Co-processor 2 registers size
628 uint8_t fp_abi; // Floating-point ABI flag
629 Elf_Word isa_ext; // Processor-specific extension
630 Elf_Word ases; // ASEs flags
631 Elf_Word flags1; // General flags
632 Elf_Word flags2; // General flags
635 } // end namespace object.
636 } // end namespace llvm.