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/ADT/StringRef.h"
15 #include "llvm/Object/Error.h"
16 #include "llvm/Support/ELF.h"
17 #include "llvm/Support/Endian.h"
18 #include "llvm/Support/Error.h"
22 #include <type_traits>
27 using support::endianness;
29 template <class ELFT> struct Elf_Ehdr_Impl;
30 template <class ELFT> struct Elf_Shdr_Impl;
31 template <class ELFT> struct Elf_Sym_Impl;
32 template <class ELFT> struct Elf_Dyn_Impl;
33 template <class ELFT> struct Elf_Phdr_Impl;
34 template <class ELFT, bool isRela> struct Elf_Rel_Impl;
35 template <class ELFT> struct Elf_Verdef_Impl;
36 template <class ELFT> struct Elf_Verdaux_Impl;
37 template <class ELFT> struct Elf_Verneed_Impl;
38 template <class ELFT> struct Elf_Vernaux_Impl;
39 template <class ELFT> struct Elf_Versym_Impl;
40 template <class ELFT> struct Elf_Hash_Impl;
41 template <class ELFT> struct Elf_GnuHash_Impl;
42 template <class ELFT> struct Elf_Chdr_Impl;
44 template <endianness E, bool Is64> struct ELFType {
46 template <typename Ty>
47 using packed = support::detail::packed_endian_specific_integral<Ty, E, 2>;
50 static const endianness TargetEndianness = E;
51 static const bool Is64Bits = Is64;
53 using uint = typename std::conditional<Is64, uint64_t, uint32_t>::type;
54 using Ehdr = Elf_Ehdr_Impl<ELFType<E, Is64>>;
55 using Shdr = Elf_Shdr_Impl<ELFType<E, Is64>>;
56 using Sym = Elf_Sym_Impl<ELFType<E, Is64>>;
57 using Dyn = Elf_Dyn_Impl<ELFType<E, Is64>>;
58 using Phdr = Elf_Phdr_Impl<ELFType<E, Is64>>;
59 using Rel = Elf_Rel_Impl<ELFType<E, Is64>, false>;
60 using Rela = Elf_Rel_Impl<ELFType<E, Is64>, true>;
61 using Verdef = Elf_Verdef_Impl<ELFType<E, Is64>>;
62 using Verdaux = Elf_Verdaux_Impl<ELFType<E, Is64>>;
63 using Verneed = Elf_Verneed_Impl<ELFType<E, Is64>>;
64 using Vernaux = Elf_Vernaux_Impl<ELFType<E, Is64>>;
65 using Versym = Elf_Versym_Impl<ELFType<E, Is64>>;
66 using Hash = Elf_Hash_Impl<ELFType<E, Is64>>;
67 using GnuHash = Elf_GnuHash_Impl<ELFType<E, Is64>>;
68 using Chdr = Elf_Chdr_Impl<ELFType<E, Is64>>;
69 using DynRange = ArrayRef<Dyn>;
70 using ShdrRange = ArrayRef<Shdr>;
71 using SymRange = ArrayRef<Sym>;
72 using RelRange = ArrayRef<Rel>;
73 using RelaRange = ArrayRef<Rela>;
74 using PhdrRange = ArrayRef<Phdr>;
76 using Half = packed<uint16_t>;
77 using Word = packed<uint32_t>;
78 using Sword = packed<int32_t>;
79 using Xword = packed<uint64_t>;
80 using Sxword = packed<int64_t>;
81 using Addr = packed<uint>;
82 using Off = packed<uint>;
85 using ELF32LE = ELFType<support::little, false>;
86 using ELF32BE = ELFType<support::big, false>;
87 using ELF64LE = ELFType<support::little, true>;
88 using ELF64BE = ELFType<support::big, true>;
90 // Use an alignment of 2 for the typedefs since that is the worst case for
91 // ELF files in archives.
93 // Templates to choose Elf_Addr and Elf_Off depending on is64Bits.
94 template <endianness target_endianness> struct ELFDataTypeTypedefHelperCommon {
95 using Elf_Half = support::detail::packed_endian_specific_integral<
96 uint16_t, target_endianness, 2>;
97 using Elf_Word = support::detail::packed_endian_specific_integral<
98 uint32_t, target_endianness, 2>;
99 using Elf_Sword = support::detail::packed_endian_specific_integral<
100 int32_t, target_endianness, 2>;
101 using Elf_Xword = support::detail::packed_endian_specific_integral<
102 uint64_t, target_endianness, 2>;
103 using Elf_Sxword = support::detail::packed_endian_specific_integral<
104 int64_t, target_endianness, 2>;
107 template <class ELFT> struct ELFDataTypeTypedefHelper;
110 template <endianness TargetEndianness>
111 struct ELFDataTypeTypedefHelper<ELFType<TargetEndianness, false>>
112 : ELFDataTypeTypedefHelperCommon<TargetEndianness> {
113 using value_type = uint32_t;
114 using Elf_Addr = support::detail::packed_endian_specific_integral<
115 value_type, TargetEndianness, 2>;
116 using Elf_Off = support::detail::packed_endian_specific_integral<
117 value_type, TargetEndianness, 2>;
121 template <endianness TargetEndianness>
122 struct ELFDataTypeTypedefHelper<ELFType<TargetEndianness, true>>
123 : ELFDataTypeTypedefHelperCommon<TargetEndianness> {
124 using value_type = uint64_t;
125 using Elf_Addr = support::detail::packed_endian_specific_integral<
126 value_type, TargetEndianness, 2>;
127 using Elf_Off = support::detail::packed_endian_specific_integral<
128 value_type, TargetEndianness, 2>;
131 // I really don't like doing this, but the alternative is copypasta.
133 #define LLVM_ELF_IMPORT_TYPES_ELFT(ELFT) \
134 using Elf_Addr = typename ELFT::Addr; \
135 using Elf_Off = typename ELFT::Off; \
136 using Elf_Half = typename ELFT::Half; \
137 using Elf_Word = typename ELFT::Word; \
138 using Elf_Sword = typename ELFT::Sword; \
139 using Elf_Xword = typename ELFT::Xword; \
140 using Elf_Sxword = typename ELFT::Sxword;
142 #define LLD_ELF_COMMA ,
143 #define LLVM_ELF_IMPORT_TYPES(E, W) \
144 LLVM_ELF_IMPORT_TYPES_ELFT(ELFType<E LLD_ELF_COMMA W>)
147 template <class ELFT> struct Elf_Shdr_Base;
149 template <endianness TargetEndianness>
150 struct Elf_Shdr_Base<ELFType<TargetEndianness, false>> {
151 LLVM_ELF_IMPORT_TYPES(TargetEndianness, false)
152 Elf_Word sh_name; // Section name (index into string table)
153 Elf_Word sh_type; // Section type (SHT_*)
154 Elf_Word sh_flags; // Section flags (SHF_*)
155 Elf_Addr sh_addr; // Address where section is to be loaded
156 Elf_Off sh_offset; // File offset of section data, in bytes
157 Elf_Word sh_size; // Size of section, in bytes
158 Elf_Word sh_link; // Section type-specific header table index link
159 Elf_Word sh_info; // Section type-specific extra information
160 Elf_Word sh_addralign; // Section address alignment
161 Elf_Word sh_entsize; // Size of records contained within the section
164 template <endianness TargetEndianness>
165 struct Elf_Shdr_Base<ELFType<TargetEndianness, true>> {
166 LLVM_ELF_IMPORT_TYPES(TargetEndianness, true)
167 Elf_Word sh_name; // Section name (index into string table)
168 Elf_Word sh_type; // Section type (SHT_*)
169 Elf_Xword sh_flags; // Section flags (SHF_*)
170 Elf_Addr sh_addr; // Address where section is to be loaded
171 Elf_Off sh_offset; // File offset of section data, in bytes
172 Elf_Xword sh_size; // Size of section, in bytes
173 Elf_Word sh_link; // Section type-specific header table index link
174 Elf_Word sh_info; // Section type-specific extra information
175 Elf_Xword sh_addralign; // Section address alignment
176 Elf_Xword sh_entsize; // Size of records contained within the section
179 template <class ELFT>
180 struct Elf_Shdr_Impl : Elf_Shdr_Base<ELFT> {
181 using Elf_Shdr_Base<ELFT>::sh_entsize;
182 using Elf_Shdr_Base<ELFT>::sh_size;
184 /// @brief Get the number of entities this section contains if it has any.
185 unsigned getEntityCount() const {
188 return sh_size / sh_entsize;
192 template <class ELFT> struct Elf_Sym_Base;
194 template <endianness TargetEndianness>
195 struct Elf_Sym_Base<ELFType<TargetEndianness, false>> {
196 LLVM_ELF_IMPORT_TYPES(TargetEndianness, false)
197 Elf_Word st_name; // Symbol name (index into string table)
198 Elf_Addr st_value; // Value or address associated with the symbol
199 Elf_Word st_size; // Size of the symbol
200 unsigned char st_info; // Symbol's type and binding attributes
201 unsigned char st_other; // Must be zero; reserved
202 Elf_Half st_shndx; // Which section (header table index) it's defined in
205 template <endianness TargetEndianness>
206 struct Elf_Sym_Base<ELFType<TargetEndianness, true>> {
207 LLVM_ELF_IMPORT_TYPES(TargetEndianness, true)
208 Elf_Word st_name; // Symbol name (index into string table)
209 unsigned char st_info; // Symbol's type and binding attributes
210 unsigned char st_other; // Must be zero; reserved
211 Elf_Half st_shndx; // Which section (header table index) it's defined in
212 Elf_Addr st_value; // Value or address associated with the symbol
213 Elf_Xword st_size; // Size of the symbol
216 template <class ELFT>
217 struct Elf_Sym_Impl : Elf_Sym_Base<ELFT> {
218 using Elf_Sym_Base<ELFT>::st_info;
219 using Elf_Sym_Base<ELFT>::st_shndx;
220 using Elf_Sym_Base<ELFT>::st_other;
221 using Elf_Sym_Base<ELFT>::st_value;
223 // These accessors and mutators correspond to the ELF32_ST_BIND,
224 // ELF32_ST_TYPE, and ELF32_ST_INFO macros defined in the ELF specification:
225 unsigned char getBinding() const { return st_info >> 4; }
226 unsigned char getType() const { return st_info & 0x0f; }
227 uint64_t getValue() const { return st_value; }
228 void setBinding(unsigned char b) { setBindingAndType(b, getType()); }
229 void setType(unsigned char t) { setBindingAndType(getBinding(), t); }
231 void setBindingAndType(unsigned char b, unsigned char t) {
232 st_info = (b << 4) + (t & 0x0f);
235 /// Access to the STV_xxx flag stored in the first two bits of st_other.
240 unsigned char getVisibility() const { return st_other & 0x3; }
241 void setVisibility(unsigned char v) {
242 assert(v < 4 && "Invalid value for visibility");
243 st_other = (st_other & ~0x3) | v;
246 bool isAbsolute() const { return st_shndx == ELF::SHN_ABS; }
248 bool isCommon() const {
249 return getType() == ELF::STT_COMMON || st_shndx == ELF::SHN_COMMON;
252 bool isDefined() const { return !isUndefined(); }
254 bool isProcessorSpecific() const {
255 return st_shndx >= ELF::SHN_LOPROC && st_shndx <= ELF::SHN_HIPROC;
258 bool isOSSpecific() const {
259 return st_shndx >= ELF::SHN_LOOS && st_shndx <= ELF::SHN_HIOS;
262 bool isReserved() const {
263 // ELF::SHN_HIRESERVE is 0xffff so st_shndx <= ELF::SHN_HIRESERVE is always
264 // true and some compilers warn about it.
265 return st_shndx >= ELF::SHN_LORESERVE;
268 bool isUndefined() const { return st_shndx == ELF::SHN_UNDEF; }
270 bool isExternal() const {
271 return getBinding() != ELF::STB_LOCAL;
274 Expected<StringRef> getName(StringRef StrTab) const;
277 template <class ELFT>
278 Expected<StringRef> Elf_Sym_Impl<ELFT>::getName(StringRef StrTab) const {
279 uint32_t Offset = this->st_name;
280 if (Offset >= StrTab.size())
281 return errorCodeToError(object_error::parse_failed);
282 return StringRef(StrTab.data() + Offset);
285 /// Elf_Versym: This is the structure of entries in the SHT_GNU_versym section
286 /// (.gnu.version). This structure is identical for ELF32 and ELF64.
287 template <class ELFT>
288 struct Elf_Versym_Impl {
289 LLVM_ELF_IMPORT_TYPES_ELFT(ELFT)
290 Elf_Half vs_index; // Version index with flags (e.g. VERSYM_HIDDEN)
293 /// Elf_Verdef: This is the structure of entries in the SHT_GNU_verdef section
294 /// (.gnu.version_d). This structure is identical for ELF32 and ELF64.
295 template <class ELFT>
296 struct Elf_Verdef_Impl {
297 LLVM_ELF_IMPORT_TYPES_ELFT(ELFT)
298 using Elf_Verdaux = Elf_Verdaux_Impl<ELFT>;
299 Elf_Half vd_version; // Version of this structure (e.g. VER_DEF_CURRENT)
300 Elf_Half vd_flags; // Bitwise flags (VER_DEF_*)
301 Elf_Half vd_ndx; // Version index, used in .gnu.version entries
302 Elf_Half vd_cnt; // Number of Verdaux entries
303 Elf_Word vd_hash; // Hash of name
304 Elf_Word vd_aux; // Offset to the first Verdaux entry (in bytes)
305 Elf_Word vd_next; // Offset to the next Verdef entry (in bytes)
307 /// Get the first Verdaux entry for this Verdef.
308 const Elf_Verdaux *getAux() const {
309 return reinterpret_cast<const Elf_Verdaux *>((const char *)this + vd_aux);
313 /// Elf_Verdaux: This is the structure of auxiliary data in the SHT_GNU_verdef
314 /// section (.gnu.version_d). This structure is identical for ELF32 and ELF64.
315 template <class ELFT>
316 struct Elf_Verdaux_Impl {
317 LLVM_ELF_IMPORT_TYPES_ELFT(ELFT)
318 Elf_Word vda_name; // Version name (offset in string table)
319 Elf_Word vda_next; // Offset to next Verdaux entry (in bytes)
322 /// Elf_Verneed: This is the structure of entries in the SHT_GNU_verneed
323 /// section (.gnu.version_r). This structure is identical for ELF32 and ELF64.
324 template <class ELFT>
325 struct Elf_Verneed_Impl {
326 LLVM_ELF_IMPORT_TYPES_ELFT(ELFT)
327 Elf_Half vn_version; // Version of this structure (e.g. VER_NEED_CURRENT)
328 Elf_Half vn_cnt; // Number of associated Vernaux entries
329 Elf_Word vn_file; // Library name (string table offset)
330 Elf_Word vn_aux; // Offset to first Vernaux entry (in bytes)
331 Elf_Word vn_next; // Offset to next Verneed entry (in bytes)
334 /// Elf_Vernaux: This is the structure of auxiliary data in SHT_GNU_verneed
335 /// section (.gnu.version_r). This structure is identical for ELF32 and ELF64.
336 template <class ELFT>
337 struct Elf_Vernaux_Impl {
338 LLVM_ELF_IMPORT_TYPES_ELFT(ELFT)
339 Elf_Word vna_hash; // Hash of dependency name
340 Elf_Half vna_flags; // Bitwise Flags (VER_FLAG_*)
341 Elf_Half vna_other; // Version index, used in .gnu.version entries
342 Elf_Word vna_name; // Dependency name
343 Elf_Word vna_next; // Offset to next Vernaux entry (in bytes)
346 /// Elf_Dyn_Base: This structure matches the form of entries in the dynamic
347 /// table section (.dynamic) look like.
348 template <class ELFT> struct Elf_Dyn_Base;
350 template <endianness TargetEndianness>
351 struct Elf_Dyn_Base<ELFType<TargetEndianness, false>> {
352 LLVM_ELF_IMPORT_TYPES(TargetEndianness, false)
360 template <endianness TargetEndianness>
361 struct Elf_Dyn_Base<ELFType<TargetEndianness, true>> {
362 LLVM_ELF_IMPORT_TYPES(TargetEndianness, true)
370 /// Elf_Dyn_Impl: This inherits from Elf_Dyn_Base, adding getters.
371 template <class ELFT>
372 struct Elf_Dyn_Impl : Elf_Dyn_Base<ELFT> {
373 using Elf_Dyn_Base<ELFT>::d_tag;
374 using Elf_Dyn_Base<ELFT>::d_un;
375 using intX_t = typename std::conditional<ELFT::Is64Bits,
376 int64_t, int32_t>::type;
377 using uintX_t = typename std::conditional<ELFT::Is64Bits,
378 uint64_t, uint32_t>::type;
379 intX_t getTag() const { return d_tag; }
380 uintX_t getVal() const { return d_un.d_val; }
381 uintX_t getPtr() const { return d_un.d_ptr; }
384 template <endianness TargetEndianness>
385 struct Elf_Rel_Impl<ELFType<TargetEndianness, false>, false> {
386 LLVM_ELF_IMPORT_TYPES(TargetEndianness, false)
387 static const bool IsRela = false;
388 Elf_Addr r_offset; // Location (file byte offset, or program virtual addr)
389 Elf_Word r_info; // Symbol table index and type of relocation to apply
391 uint32_t getRInfo(bool isMips64EL) const {
395 void setRInfo(uint32_t R, bool IsMips64EL) {
400 // These accessors and mutators correspond to the ELF32_R_SYM, ELF32_R_TYPE,
401 // and ELF32_R_INFO macros defined in the ELF specification:
402 uint32_t getSymbol(bool isMips64EL) const {
403 return this->getRInfo(isMips64EL) >> 8;
405 unsigned char getType(bool isMips64EL) const {
406 return (unsigned char)(this->getRInfo(isMips64EL) & 0x0ff);
408 void setSymbol(uint32_t s, bool IsMips64EL) {
409 setSymbolAndType(s, getType(), IsMips64EL);
411 void setType(unsigned char t, bool IsMips64EL) {
412 setSymbolAndType(getSymbol(), t, IsMips64EL);
414 void setSymbolAndType(uint32_t s, unsigned char t, bool IsMips64EL) {
415 this->setRInfo((s << 8) + t, IsMips64EL);
419 template <endianness TargetEndianness>
420 struct Elf_Rel_Impl<ELFType<TargetEndianness, false>, true>
421 : public Elf_Rel_Impl<ELFType<TargetEndianness, false>, false> {
422 LLVM_ELF_IMPORT_TYPES(TargetEndianness, false)
423 static const bool IsRela = true;
424 Elf_Sword r_addend; // Compute value for relocatable field by adding this
427 template <endianness TargetEndianness>
428 struct Elf_Rel_Impl<ELFType<TargetEndianness, true>, false> {
429 LLVM_ELF_IMPORT_TYPES(TargetEndianness, true)
430 static const bool IsRela = false;
431 Elf_Addr r_offset; // Location (file byte offset, or program virtual addr)
432 Elf_Xword r_info; // Symbol table index and type of relocation to apply
434 uint64_t getRInfo(bool isMips64EL) const {
438 // Mips64 little endian has a "special" encoding of r_info. Instead of one
439 // 64 bit little endian number, it is a little endian 32 bit number followed
440 // by a 32 bit big endian number.
441 return (t << 32) | ((t >> 8) & 0xff000000) | ((t >> 24) & 0x00ff0000) |
442 ((t >> 40) & 0x0000ff00) | ((t >> 56) & 0x000000ff);
445 void setRInfo(uint64_t R, bool IsMips64EL) {
447 r_info = (R >> 32) | ((R & 0xff000000) << 8) | ((R & 0x00ff0000) << 24) |
448 ((R & 0x0000ff00) << 40) | ((R & 0x000000ff) << 56);
453 // These accessors and mutators correspond to the ELF64_R_SYM, ELF64_R_TYPE,
454 // and ELF64_R_INFO macros defined in the ELF specification:
455 uint32_t getSymbol(bool isMips64EL) const {
456 return (uint32_t)(this->getRInfo(isMips64EL) >> 32);
458 uint32_t getType(bool isMips64EL) const {
459 return (uint32_t)(this->getRInfo(isMips64EL) & 0xffffffffL);
461 void setSymbol(uint32_t s, bool IsMips64EL) {
462 setSymbolAndType(s, getType(), IsMips64EL);
464 void setType(uint32_t t, bool IsMips64EL) {
465 setSymbolAndType(getSymbol(), t, IsMips64EL);
467 void setSymbolAndType(uint32_t s, uint32_t t, bool IsMips64EL) {
468 this->setRInfo(((uint64_t)s << 32) + (t & 0xffffffffL), IsMips64EL);
472 template <endianness TargetEndianness>
473 struct Elf_Rel_Impl<ELFType<TargetEndianness, true>, true>
474 : public Elf_Rel_Impl<ELFType<TargetEndianness, true>, false> {
475 LLVM_ELF_IMPORT_TYPES(TargetEndianness, true)
476 static const bool IsRela = true;
477 Elf_Sxword r_addend; // Compute value for relocatable field by adding this.
480 template <class ELFT>
481 struct Elf_Ehdr_Impl {
482 LLVM_ELF_IMPORT_TYPES_ELFT(ELFT)
483 unsigned char e_ident[ELF::EI_NIDENT]; // ELF Identification bytes
484 Elf_Half e_type; // Type of file (see ET_*)
485 Elf_Half e_machine; // Required architecture for this file (see EM_*)
486 Elf_Word e_version; // Must be equal to 1
487 Elf_Addr e_entry; // Address to jump to in order to start program
488 Elf_Off e_phoff; // Program header table's file offset, in bytes
489 Elf_Off e_shoff; // Section header table's file offset, in bytes
490 Elf_Word e_flags; // Processor-specific flags
491 Elf_Half e_ehsize; // Size of ELF header, in bytes
492 Elf_Half e_phentsize; // Size of an entry in the program header table
493 Elf_Half e_phnum; // Number of entries in the program header table
494 Elf_Half e_shentsize; // Size of an entry in the section header table
495 Elf_Half e_shnum; // Number of entries in the section header table
496 Elf_Half e_shstrndx; // Section header table index of section name
499 bool checkMagic() const {
500 return (memcmp(e_ident, ELF::ElfMagic, strlen(ELF::ElfMagic))) == 0;
503 unsigned char getFileClass() const { return e_ident[ELF::EI_CLASS]; }
504 unsigned char getDataEncoding() const { return e_ident[ELF::EI_DATA]; }
507 template <endianness TargetEndianness>
508 struct Elf_Phdr_Impl<ELFType<TargetEndianness, false>> {
509 LLVM_ELF_IMPORT_TYPES(TargetEndianness, false)
510 Elf_Word p_type; // Type of segment
511 Elf_Off p_offset; // FileOffset where segment is located, in bytes
512 Elf_Addr p_vaddr; // Virtual Address of beginning of segment
513 Elf_Addr p_paddr; // Physical address of beginning of segment (OS-specific)
514 Elf_Word p_filesz; // Num. of bytes in file image of segment (may be zero)
515 Elf_Word p_memsz; // Num. of bytes in mem image of segment (may be zero)
516 Elf_Word p_flags; // Segment flags
517 Elf_Word p_align; // Segment alignment constraint
520 template <endianness TargetEndianness>
521 struct Elf_Phdr_Impl<ELFType<TargetEndianness, true>> {
522 LLVM_ELF_IMPORT_TYPES(TargetEndianness, true)
523 Elf_Word p_type; // Type of segment
524 Elf_Word p_flags; // Segment flags
525 Elf_Off p_offset; // FileOffset where segment is located, in bytes
526 Elf_Addr p_vaddr; // Virtual Address of beginning of segment
527 Elf_Addr p_paddr; // Physical address of beginning of segment (OS-specific)
528 Elf_Xword p_filesz; // Num. of bytes in file image of segment (may be zero)
529 Elf_Xword p_memsz; // Num. of bytes in mem image of segment (may be zero)
530 Elf_Xword p_align; // Segment alignment constraint
533 // ELFT needed for endianness.
534 template <class ELFT>
535 struct Elf_Hash_Impl {
536 LLVM_ELF_IMPORT_TYPES_ELFT(ELFT)
540 ArrayRef<Elf_Word> buckets() const {
541 return ArrayRef<Elf_Word>(&nbucket + 2, &nbucket + 2 + nbucket);
544 ArrayRef<Elf_Word> chains() const {
545 return ArrayRef<Elf_Word>(&nbucket + 2 + nbucket,
546 &nbucket + 2 + nbucket + nchain);
551 template <class ELFT>
552 struct Elf_GnuHash_Impl {
553 LLVM_ELF_IMPORT_TYPES_ELFT(ELFT)
559 ArrayRef<Elf_Off> filter() const {
560 return ArrayRef<Elf_Off>(reinterpret_cast<const Elf_Off *>(&shift2 + 1),
564 ArrayRef<Elf_Word> buckets() const {
565 return ArrayRef<Elf_Word>(
566 reinterpret_cast<const Elf_Word *>(filter().end()), nbuckets);
569 ArrayRef<Elf_Word> values(unsigned DynamicSymCount) const {
570 return ArrayRef<Elf_Word>(buckets().end(), DynamicSymCount - symndx);
574 // Compressed section headers.
575 // http://www.sco.com/developers/gabi/latest/ch4.sheader.html#compression_header
576 template <endianness TargetEndianness>
577 struct Elf_Chdr_Impl<ELFType<TargetEndianness, false>> {
578 LLVM_ELF_IMPORT_TYPES(TargetEndianness, false)
581 Elf_Word ch_addralign;
584 template <endianness TargetEndianness>
585 struct Elf_Chdr_Impl<ELFType<TargetEndianness, true>> {
586 LLVM_ELF_IMPORT_TYPES(TargetEndianness, true)
588 Elf_Word ch_reserved;
590 Elf_Xword ch_addralign;
593 // MIPS .reginfo section
594 template <class ELFT>
595 struct Elf_Mips_RegInfo;
597 template <support::endianness TargetEndianness>
598 struct Elf_Mips_RegInfo<ELFType<TargetEndianness, false>> {
599 LLVM_ELF_IMPORT_TYPES(TargetEndianness, false)
600 Elf_Word ri_gprmask; // bit-mask of used general registers
601 Elf_Word ri_cprmask[4]; // bit-mask of used co-processor registers
602 Elf_Addr ri_gp_value; // gp register value
605 template <support::endianness TargetEndianness>
606 struct Elf_Mips_RegInfo<ELFType<TargetEndianness, true>> {
607 LLVM_ELF_IMPORT_TYPES(TargetEndianness, true)
608 Elf_Word ri_gprmask; // bit-mask of used general registers
609 Elf_Word ri_pad; // unused padding field
610 Elf_Word ri_cprmask[4]; // bit-mask of used co-processor registers
611 Elf_Addr ri_gp_value; // gp register value
614 // .MIPS.options section
615 template <class ELFT> struct Elf_Mips_Options {
616 LLVM_ELF_IMPORT_TYPES_ELFT(ELFT)
617 uint8_t kind; // Determines interpretation of variable part of descriptor
618 uint8_t size; // Byte size of descriptor, including this header
619 Elf_Half section; // Section header index of section affected,
620 // or 0 for global options
621 Elf_Word info; // Kind-specific information
623 Elf_Mips_RegInfo<ELFT> &getRegInfo() {
624 assert(kind == ELF::ODK_REGINFO);
625 return *reinterpret_cast<Elf_Mips_RegInfo<ELFT> *>(
626 (uint8_t *)this + sizeof(Elf_Mips_Options));
628 const Elf_Mips_RegInfo<ELFT> &getRegInfo() const {
629 return const_cast<Elf_Mips_Options *>(this)->getRegInfo();
633 // .MIPS.abiflags section content
634 template <class ELFT> struct Elf_Mips_ABIFlags {
635 LLVM_ELF_IMPORT_TYPES_ELFT(ELFT)
636 Elf_Half version; // Version of the structure
637 uint8_t isa_level; // ISA level: 1-5, 32, and 64
638 uint8_t isa_rev; // ISA revision (0 for MIPS I - MIPS V)
639 uint8_t gpr_size; // General purpose registers size
640 uint8_t cpr1_size; // Co-processor 1 registers size
641 uint8_t cpr2_size; // Co-processor 2 registers size
642 uint8_t fp_abi; // Floating-point ABI flag
643 Elf_Word isa_ext; // Processor-specific extension
644 Elf_Word ases; // ASEs flags
645 Elf_Word flags1; // General flags
646 Elf_Word flags2; // General flags
649 } // end namespace object.
650 } // end namespace llvm.
652 #endif // LLVM_OBJECT_ELFTYPES_H