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Reid Kleckner146eb7a2017-06-02 17:53:06 +00001//===- COFFImportFile.cpp - COFF short import file implementation ---------===//
Martell Malone375dc902017-05-20 19:56:29 +00002//
Reid Kleckner146eb7a2017-06-02 17:53:06 +00003// The LLVM Compiler Infrastructure
Martell Malone375dc902017-05-20 19:56:29 +00004//
5// This file is distributed under the University of Illinois Open Source
6// License. See LICENSE.TXT for details.
7//
8//===----------------------------------------------------------------------===//
9//
Reid Kleckner146eb7a2017-06-02 17:53:06 +000010// This file defines the writeImportLibrary function.
Martell Malone375dc902017-05-20 19:56:29 +000011//
12//===----------------------------------------------------------------------===//
13
Reid Kleckner146eb7a2017-06-02 17:53:06 +000014#include "llvm/Object/COFFImportFile.h"
15#include "llvm/ADT/ArrayRef.h"
Martell Malone375dc902017-05-20 19:56:29 +000016#include "llvm/Object/Archive.h"
17#include "llvm/Object/ArchiveWriter.h"
18#include "llvm/Object/COFF.h"
Reid Kleckner146eb7a2017-06-02 17:53:06 +000019#include "llvm/Support/Error.h"
Martell Malone375dc902017-05-20 19:56:29 +000020#include "llvm/Support/Path.h"
21
Reid Kleckner146eb7a2017-06-02 17:53:06 +000022#include <cstdint>
23#include <map>
24#include <set>
25#include <string>
Martell Malone375dc902017-05-20 19:56:29 +000026#include <vector>
27
28using namespace llvm::COFF;
29using namespace llvm::object;
30using namespace llvm;
31
Reid Kleckner146eb7a2017-06-02 17:53:06 +000032namespace llvm {
33namespace object {
34
35static bool is32bit(MachineTypes Machine) {
36 switch (Machine) {
Martell Malone375dc902017-05-20 19:56:29 +000037 default:
38 llvm_unreachable("unsupported machine");
39 case IMAGE_FILE_MACHINE_AMD64:
40 return false;
41 case IMAGE_FILE_MACHINE_ARMNT:
42 case IMAGE_FILE_MACHINE_I386:
43 return true;
44 }
45}
46
Reid Kleckner146eb7a2017-06-02 17:53:06 +000047static uint16_t getImgRelRelocation(MachineTypes Machine) {
48 switch (Machine) {
Martell Malone375dc902017-05-20 19:56:29 +000049 default:
50 llvm_unreachable("unsupported machine");
51 case IMAGE_FILE_MACHINE_AMD64:
52 return IMAGE_REL_AMD64_ADDR32NB;
53 case IMAGE_FILE_MACHINE_ARMNT:
54 return IMAGE_REL_ARM_ADDR32NB;
55 case IMAGE_FILE_MACHINE_I386:
56 return IMAGE_REL_I386_DIR32NB;
57 }
58}
59
60template <class T> static void append(std::vector<uint8_t> &B, const T &Data) {
61 size_t S = B.size();
62 B.resize(S + sizeof(T));
63 memcpy(&B[S], &Data, sizeof(T));
64}
65
66static void writeStringTable(std::vector<uint8_t> &B,
67 ArrayRef<const std::string> Strings) {
68 // The COFF string table consists of a 4-byte value which is the size of the
69 // table, including the length field itself. This value is followed by the
70 // string content itself, which is an array of null-terminated C-style
71 // strings. The termination is important as they are referenced to by offset
72 // by the symbol entity in the file format.
73
Reid Kleckner146eb7a2017-06-02 17:53:06 +000074 size_t Pos = B.size();
75 size_t Offset = B.size();
Martell Malone375dc902017-05-20 19:56:29 +000076
77 // Skip over the length field, we will fill it in later as we will have
78 // computed the length while emitting the string content itself.
79 Pos += sizeof(uint32_t);
80
81 for (const auto &S : Strings) {
82 B.resize(Pos + S.length() + 1);
83 strcpy(reinterpret_cast<char *>(&B[Pos]), S.c_str());
84 Pos += S.length() + 1;
85 }
86
87 // Backfill the length of the table now that it has been computed.
88 support::ulittle32_t Length(B.size() - Offset);
Reid Kleckner146eb7a2017-06-02 17:53:06 +000089 support::endian::write32le(&B[Offset], Length);
Martell Malone375dc902017-05-20 19:56:29 +000090}
91
Reid Kleckner146eb7a2017-06-02 17:53:06 +000092static ImportNameType getNameType(StringRef Sym, StringRef ExtName,
93 MachineTypes Machine) {
Martell Malone375dc902017-05-20 19:56:29 +000094 if (Sym != ExtName)
95 return IMPORT_NAME_UNDECORATE;
Reid Kleckner146eb7a2017-06-02 17:53:06 +000096 if (Machine == IMAGE_FILE_MACHINE_I386 && Sym.startswith("_"))
Martell Malone375dc902017-05-20 19:56:29 +000097 return IMPORT_NAME_NOPREFIX;
98 return IMPORT_NAME;
99}
100
Reid Kleckner146eb7a2017-06-02 17:53:06 +0000101static Expected<std::string> replace(StringRef S, StringRef From,
102 StringRef To) {
Martell Malone375dc902017-05-20 19:56:29 +0000103 size_t Pos = S.find(From);
104
105 // From and To may be mangled, but substrings in S may not.
106 if (Pos == StringRef::npos && From.startswith("_") && To.startswith("_")) {
107 From = From.substr(1);
108 To = To.substr(1);
109 Pos = S.find(From);
110 }
111
112 if (Pos == StringRef::npos) {
Reid Kleckner146eb7a2017-06-02 17:53:06 +0000113 return make_error<StringError>(
114 StringRef(Twine(S + ": replacing '" + From +
115 "' with '" + To + "' failed").str()), object_error::parse_failed);
Martell Malone375dc902017-05-20 19:56:29 +0000116 }
Reid Kleckner146eb7a2017-06-02 17:53:06 +0000117
Martell Malone375dc902017-05-20 19:56:29 +0000118 return (Twine(S.substr(0, Pos)) + To + S.substr(Pos + From.size())).str();
119}
120
121static const std::string NullImportDescriptorSymbolName =
122 "__NULL_IMPORT_DESCRIPTOR";
123
124namespace {
125// This class constructs various small object files necessary to support linking
126// symbols imported from a DLL. The contents are pretty strictly defined and
127// nearly entirely static. The details of the structures files are defined in
128// WINNT.h and the PE/COFF specification.
129class ObjectFactory {
130 using u16 = support::ulittle16_t;
131 using u32 = support::ulittle32_t;
Reid Kleckner146eb7a2017-06-02 17:53:06 +0000132 MachineTypes Machine;
Martell Malone375dc902017-05-20 19:56:29 +0000133 BumpPtrAllocator Alloc;
134 StringRef DLLName;
135 StringRef Library;
136 std::string ImportDescriptorSymbolName;
137 std::string NullThunkSymbolName;
138
139public:
Reid Kleckner146eb7a2017-06-02 17:53:06 +0000140 ObjectFactory(StringRef S, MachineTypes M)
141 : Machine(M), DLLName(S), Library(S.drop_back(4)),
Martell Malone375dc902017-05-20 19:56:29 +0000142 ImportDescriptorSymbolName(("__IMPORT_DESCRIPTOR_" + Library).str()),
143 NullThunkSymbolName(("\x7f" + Library + "_NULL_THUNK_DATA").str()) {}
144
145 // Creates an Import Descriptor. This is a small object file which contains a
146 // reference to the terminators and contains the library name (entry) for the
147 // import name table. It will force the linker to construct the necessary
148 // structure to import symbols from the DLL.
149 NewArchiveMember createImportDescriptor(std::vector<uint8_t> &Buffer);
150
151 // Creates a NULL import descriptor. This is a small object file whcih
152 // contains a NULL import descriptor. It is used to terminate the imports
153 // from a specific DLL.
154 NewArchiveMember createNullImportDescriptor(std::vector<uint8_t> &Buffer);
155
156 // Create a NULL Thunk Entry. This is a small object file which contains a
157 // NULL Import Address Table entry and a NULL Import Lookup Table Entry. It
158 // is used to terminate the IAT and ILT.
159 NewArchiveMember createNullThunk(std::vector<uint8_t> &Buffer);
160
161 // Create a short import file which is described in PE/COFF spec 7. Import
162 // Library Format.
163 NewArchiveMember createShortImport(StringRef Sym, uint16_t Ordinal,
164 ImportType Type, ImportNameType NameType);
165};
Reid Kleckner146eb7a2017-06-02 17:53:06 +0000166} // namespace
Martell Malone375dc902017-05-20 19:56:29 +0000167
168NewArchiveMember
169ObjectFactory::createImportDescriptor(std::vector<uint8_t> &Buffer) {
170 static const uint32_t NumberOfSections = 2;
171 static const uint32_t NumberOfSymbols = 7;
172 static const uint32_t NumberOfRelocations = 3;
173
174 // COFF Header
175 coff_file_header Header{
Reid Kleckner146eb7a2017-06-02 17:53:06 +0000176 u16(Machine),
177 u16(NumberOfSections),
178 u32(0),
Martell Malone375dc902017-05-20 19:56:29 +0000179 u32(sizeof(Header) + (NumberOfSections * sizeof(coff_section)) +
180 // .idata$2
181 sizeof(coff_import_directory_table_entry) +
182 NumberOfRelocations * sizeof(coff_relocation) +
183 // .idata$4
184 (DLLName.size() + 1)),
Reid Kleckner146eb7a2017-06-02 17:53:06 +0000185 u32(NumberOfSymbols),
186 u16(0),
187 u16(is32bit(Machine) ? IMAGE_FILE_32BIT_MACHINE : 0),
Martell Malone375dc902017-05-20 19:56:29 +0000188 };
189 append(Buffer, Header);
190
191 // Section Header Table
192 static const coff_section SectionTable[NumberOfSections] = {
193 {{'.', 'i', 'd', 'a', 't', 'a', '$', '2'},
194 u32(0),
195 u32(0),
196 u32(sizeof(coff_import_directory_table_entry)),
197 u32(sizeof(coff_file_header) + NumberOfSections * sizeof(coff_section)),
198 u32(sizeof(coff_file_header) + NumberOfSections * sizeof(coff_section) +
199 sizeof(coff_import_directory_table_entry)),
200 u32(0),
201 u16(NumberOfRelocations),
202 u16(0),
203 u32(IMAGE_SCN_ALIGN_4BYTES | IMAGE_SCN_CNT_INITIALIZED_DATA |
204 IMAGE_SCN_MEM_READ | IMAGE_SCN_MEM_WRITE)},
205 {{'.', 'i', 'd', 'a', 't', 'a', '$', '6'},
206 u32(0),
207 u32(0),
208 u32(DLLName.size() + 1),
209 u32(sizeof(coff_file_header) + NumberOfSections * sizeof(coff_section) +
210 sizeof(coff_import_directory_table_entry) +
211 NumberOfRelocations * sizeof(coff_relocation)),
212 u32(0),
213 u32(0),
214 u16(0),
215 u16(0),
216 u32(IMAGE_SCN_ALIGN_2BYTES | IMAGE_SCN_CNT_INITIALIZED_DATA |
217 IMAGE_SCN_MEM_READ | IMAGE_SCN_MEM_WRITE)},
218 };
219 append(Buffer, SectionTable);
220
221 // .idata$2
222 static const coff_import_directory_table_entry ImportDescriptor{
223 u32(0), u32(0), u32(0), u32(0), u32(0),
224 };
225 append(Buffer, ImportDescriptor);
226
227 static const coff_relocation RelocationTable[NumberOfRelocations] = {
228 {u32(offsetof(coff_import_directory_table_entry, NameRVA)), u32(2),
Reid Kleckner146eb7a2017-06-02 17:53:06 +0000229 u16(getImgRelRelocation(Machine))},
Martell Malone375dc902017-05-20 19:56:29 +0000230 {u32(offsetof(coff_import_directory_table_entry, ImportLookupTableRVA)),
Reid Kleckner146eb7a2017-06-02 17:53:06 +0000231 u32(3), u16(getImgRelRelocation(Machine))},
Martell Malone375dc902017-05-20 19:56:29 +0000232 {u32(offsetof(coff_import_directory_table_entry, ImportAddressTableRVA)),
Reid Kleckner146eb7a2017-06-02 17:53:06 +0000233 u32(4), u16(getImgRelRelocation(Machine))},
Martell Malone375dc902017-05-20 19:56:29 +0000234 };
235 append(Buffer, RelocationTable);
236
237 // .idata$6
238 auto S = Buffer.size();
239 Buffer.resize(S + DLLName.size() + 1);
240 memcpy(&Buffer[S], DLLName.data(), DLLName.size());
241 Buffer[S + DLLName.size()] = '\0';
242
243 // Symbol Table
244 coff_symbol16 SymbolTable[NumberOfSymbols] = {
245 {{{0, 0, 0, 0, 0, 0, 0, 0}},
246 u32(0),
247 u16(1),
248 u16(0),
249 IMAGE_SYM_CLASS_EXTERNAL,
250 0},
251 {{{'.', 'i', 'd', 'a', 't', 'a', '$', '2'}},
252 u32(0),
253 u16(1),
254 u16(0),
255 IMAGE_SYM_CLASS_SECTION,
256 0},
257 {{{'.', 'i', 'd', 'a', 't', 'a', '$', '6'}},
258 u32(0),
259 u16(2),
260 u16(0),
261 IMAGE_SYM_CLASS_STATIC,
262 0},
263 {{{'.', 'i', 'd', 'a', 't', 'a', '$', '4'}},
264 u32(0),
265 u16(0),
266 u16(0),
267 IMAGE_SYM_CLASS_SECTION,
268 0},
269 {{{'.', 'i', 'd', 'a', 't', 'a', '$', '5'}},
270 u32(0),
271 u16(0),
272 u16(0),
273 IMAGE_SYM_CLASS_SECTION,
274 0},
275 {{{0, 0, 0, 0, 0, 0, 0, 0}},
276 u32(0),
277 u16(0),
278 u16(0),
279 IMAGE_SYM_CLASS_EXTERNAL,
280 0},
281 {{{0, 0, 0, 0, 0, 0, 0, 0}},
282 u32(0),
283 u16(0),
284 u16(0),
285 IMAGE_SYM_CLASS_EXTERNAL,
286 0},
287 };
288 reinterpret_cast<StringTableOffset &>(SymbolTable[0].Name).Offset =
289 sizeof(uint32_t);
290 reinterpret_cast<StringTableOffset &>(SymbolTable[5].Name).Offset =
291 sizeof(uint32_t) + ImportDescriptorSymbolName.length() + 1;
292 reinterpret_cast<StringTableOffset &>(SymbolTable[6].Name).Offset =
293 sizeof(uint32_t) + ImportDescriptorSymbolName.length() + 1 +
294 NullImportDescriptorSymbolName.length() + 1;
295 append(Buffer, SymbolTable);
296
297 // String Table
298 writeStringTable(Buffer,
299 {ImportDescriptorSymbolName, NullImportDescriptorSymbolName,
300 NullThunkSymbolName});
301
302 StringRef F{reinterpret_cast<const char *>(Buffer.data()), Buffer.size()};
303 return {MemoryBufferRef(F, DLLName)};
304}
305
306NewArchiveMember
307ObjectFactory::createNullImportDescriptor(std::vector<uint8_t> &Buffer) {
308 static const uint32_t NumberOfSections = 1;
309 static const uint32_t NumberOfSymbols = 1;
310
311 // COFF Header
312 coff_file_header Header{
Reid Kleckner146eb7a2017-06-02 17:53:06 +0000313 u16(Machine),
314 u16(NumberOfSections),
315 u32(0),
Martell Malone375dc902017-05-20 19:56:29 +0000316 u32(sizeof(Header) + (NumberOfSections * sizeof(coff_section)) +
317 // .idata$3
318 sizeof(coff_import_directory_table_entry)),
Reid Kleckner146eb7a2017-06-02 17:53:06 +0000319 u32(NumberOfSymbols),
320 u16(0),
321 u16(is32bit(Machine) ? IMAGE_FILE_32BIT_MACHINE : 0),
Martell Malone375dc902017-05-20 19:56:29 +0000322 };
323 append(Buffer, Header);
324
325 // Section Header Table
326 static const coff_section SectionTable[NumberOfSections] = {
327 {{'.', 'i', 'd', 'a', 't', 'a', '$', '3'},
328 u32(0),
329 u32(0),
330 u32(sizeof(coff_import_directory_table_entry)),
331 u32(sizeof(coff_file_header) +
332 (NumberOfSections * sizeof(coff_section))),
333 u32(0),
334 u32(0),
335 u16(0),
336 u16(0),
337 u32(IMAGE_SCN_ALIGN_4BYTES | IMAGE_SCN_CNT_INITIALIZED_DATA |
338 IMAGE_SCN_MEM_READ | IMAGE_SCN_MEM_WRITE)},
339 };
340 append(Buffer, SectionTable);
341
342 // .idata$3
343 static const coff_import_directory_table_entry ImportDescriptor{
344 u32(0), u32(0), u32(0), u32(0), u32(0),
345 };
346 append(Buffer, ImportDescriptor);
347
348 // Symbol Table
349 coff_symbol16 SymbolTable[NumberOfSymbols] = {
350 {{{0, 0, 0, 0, 0, 0, 0, 0}},
351 u32(0),
352 u16(1),
353 u16(0),
354 IMAGE_SYM_CLASS_EXTERNAL,
355 0},
356 };
357 reinterpret_cast<StringTableOffset &>(SymbolTable[0].Name).Offset =
358 sizeof(uint32_t);
359 append(Buffer, SymbolTable);
360
361 // String Table
362 writeStringTable(Buffer, {NullImportDescriptorSymbolName});
363
364 StringRef F{reinterpret_cast<const char *>(Buffer.data()), Buffer.size()};
365 return {MemoryBufferRef(F, DLLName)};
366}
367
368NewArchiveMember ObjectFactory::createNullThunk(std::vector<uint8_t> &Buffer) {
369 static const uint32_t NumberOfSections = 2;
370 static const uint32_t NumberOfSymbols = 1;
Reid Kleckner146eb7a2017-06-02 17:53:06 +0000371 uint32_t VASize = is32bit(Machine) ? 4 : 8;
Martell Malone375dc902017-05-20 19:56:29 +0000372
373 // COFF Header
374 coff_file_header Header{
Reid Kleckner146eb7a2017-06-02 17:53:06 +0000375 u16(Machine),
376 u16(NumberOfSections),
377 u32(0),
Martell Malone375dc902017-05-20 19:56:29 +0000378 u32(sizeof(Header) + (NumberOfSections * sizeof(coff_section)) +
379 // .idata$5
380 VASize +
381 // .idata$4
382 VASize),
Reid Kleckner146eb7a2017-06-02 17:53:06 +0000383 u32(NumberOfSymbols),
384 u16(0),
385 u16(is32bit(Machine) ? IMAGE_FILE_32BIT_MACHINE : 0),
Martell Malone375dc902017-05-20 19:56:29 +0000386 };
387 append(Buffer, Header);
388
389 // Section Header Table
390 static const coff_section SectionTable[NumberOfSections] = {
391 {{'.', 'i', 'd', 'a', 't', 'a', '$', '5'},
392 u32(0),
393 u32(0),
394 u32(VASize),
395 u32(sizeof(coff_file_header) + NumberOfSections * sizeof(coff_section)),
396 u32(0),
397 u32(0),
398 u16(0),
399 u16(0),
Reid Kleckner146eb7a2017-06-02 17:53:06 +0000400 u32((is32bit(Machine) ? IMAGE_SCN_ALIGN_4BYTES
401 : IMAGE_SCN_ALIGN_8BYTES) |
Martell Malone375dc902017-05-20 19:56:29 +0000402 IMAGE_SCN_CNT_INITIALIZED_DATA | IMAGE_SCN_MEM_READ |
403 IMAGE_SCN_MEM_WRITE)},
404 {{'.', 'i', 'd', 'a', 't', 'a', '$', '4'},
405 u32(0),
406 u32(0),
407 u32(VASize),
408 u32(sizeof(coff_file_header) + NumberOfSections * sizeof(coff_section) +
409 VASize),
410 u32(0),
411 u32(0),
412 u16(0),
413 u16(0),
Reid Kleckner146eb7a2017-06-02 17:53:06 +0000414 u32((is32bit(Machine) ? IMAGE_SCN_ALIGN_4BYTES
415 : IMAGE_SCN_ALIGN_8BYTES) |
Martell Malone375dc902017-05-20 19:56:29 +0000416 IMAGE_SCN_CNT_INITIALIZED_DATA | IMAGE_SCN_MEM_READ |
417 IMAGE_SCN_MEM_WRITE)},
418 };
419 append(Buffer, SectionTable);
420
421 // .idata$5, ILT
422 append(Buffer, u32(0));
Reid Kleckner146eb7a2017-06-02 17:53:06 +0000423 if (!is32bit(Machine))
Martell Malone375dc902017-05-20 19:56:29 +0000424 append(Buffer, u32(0));
425
426 // .idata$4, IAT
427 append(Buffer, u32(0));
Reid Kleckner146eb7a2017-06-02 17:53:06 +0000428 if (!is32bit(Machine))
Martell Malone375dc902017-05-20 19:56:29 +0000429 append(Buffer, u32(0));
430
431 // Symbol Table
432 coff_symbol16 SymbolTable[NumberOfSymbols] = {
433 {{{0, 0, 0, 0, 0, 0, 0, 0}},
434 u32(0),
435 u16(1),
436 u16(0),
437 IMAGE_SYM_CLASS_EXTERNAL,
438 0},
439 };
440 reinterpret_cast<StringTableOffset &>(SymbolTable[0].Name).Offset =
441 sizeof(uint32_t);
442 append(Buffer, SymbolTable);
443
444 // String Table
445 writeStringTable(Buffer, {NullThunkSymbolName});
446
447 StringRef F{reinterpret_cast<const char *>(Buffer.data()), Buffer.size()};
448 return {MemoryBufferRef{F, DLLName}};
449}
450
451NewArchiveMember ObjectFactory::createShortImport(StringRef Sym,
452 uint16_t Ordinal,
453 ImportType ImportType,
454 ImportNameType NameType) {
455 size_t ImpSize = DLLName.size() + Sym.size() + 2; // +2 for NULs
456 size_t Size = sizeof(coff_import_header) + ImpSize;
457 char *Buf = Alloc.Allocate<char>(Size);
458 memset(Buf, 0, Size);
459 char *P = Buf;
460
461 // Write short import library.
462 auto *Imp = reinterpret_cast<coff_import_header *>(P);
463 P += sizeof(*Imp);
464 Imp->Sig2 = 0xFFFF;
Reid Kleckner146eb7a2017-06-02 17:53:06 +0000465 Imp->Machine = Machine;
Martell Malone375dc902017-05-20 19:56:29 +0000466 Imp->SizeOfData = ImpSize;
467 if (Ordinal > 0)
468 Imp->OrdinalHint = Ordinal;
469 Imp->TypeInfo = (NameType << 2) | ImportType;
470
471 // Write symbol name and DLL name.
472 memcpy(P, Sym.data(), Sym.size());
473 P += Sym.size() + 1;
474 memcpy(P, DLLName.data(), DLLName.size());
475
476 return {MemoryBufferRef(StringRef(Buf, Size), DLLName)};
477}
478
Reid Kleckner146eb7a2017-06-02 17:53:06 +0000479std::error_code writeImportLibrary(StringRef DLLName, StringRef Path,
480 ArrayRef<COFFShortExport> Exports,
481 MachineTypes Machine) {
Reid Klecknerd249e4a2017-06-02 16:26:24 +0000482
Reid Kleckner146eb7a2017-06-02 17:53:06 +0000483 std::vector<NewArchiveMember> Members;
484 ObjectFactory OF(llvm::sys::path::filename(DLLName), Machine);
Martell Malone375dc902017-05-20 19:56:29 +0000485
486 std::vector<uint8_t> ImportDescriptor;
487 Members.push_back(OF.createImportDescriptor(ImportDescriptor));
488
489 std::vector<uint8_t> NullImportDescriptor;
490 Members.push_back(OF.createNullImportDescriptor(NullImportDescriptor));
491
492 std::vector<uint8_t> NullThunk;
493 Members.push_back(OF.createNullThunk(NullThunk));
494
Reid Kleckner146eb7a2017-06-02 17:53:06 +0000495 for (COFFShortExport E : Exports) {
Martell Malone375dc902017-05-20 19:56:29 +0000496 if (E.Private)
497 continue;
498
499 ImportType ImportType = IMPORT_CODE;
500 if (E.Data)
501 ImportType = IMPORT_DATA;
502 if (E.Constant)
503 ImportType = IMPORT_CONST;
504
Reid Kleckner146eb7a2017-06-02 17:53:06 +0000505 StringRef SymbolName = E.isWeak() ? E.ExtName : E.Name;
506 ImportNameType NameType = getNameType(SymbolName, E.Name, Machine);
507 Expected<std::string> Name = E.ExtName.empty()
508 ? SymbolName
509 : replace(SymbolName, E.Name, E.ExtName);
510
511 if (!Name) {
512 return errorToErrorCode(Name.takeError());
513 }
514
515 Members.push_back(
516 OF.createShortImport(*Name, E.Ordinal, ImportType, NameType));
Martell Malone375dc902017-05-20 19:56:29 +0000517 }
518
519 std::pair<StringRef, std::error_code> Result =
520 writeArchive(Path, Members, /*WriteSymtab*/ true, object::Archive::K_GNU,
521 /*Deterministic*/ true, /*Thin*/ false);
Reid Kleckner146eb7a2017-06-02 17:53:06 +0000522
523 return Result.second;
Martell Malone375dc902017-05-20 19:56:29 +0000524}
Reid Kleckner146eb7a2017-06-02 17:53:06 +0000525
526} // namespace object
527} // namespace llvm