aboutsummaryrefslogtreecommitdiffstats
path: root/contrib/libs/llvm14/lib/Object/COFFImportFile.cpp
diff options
context:
space:
mode:
authorvitalyisaev <vitalyisaev@yandex-team.com>2023-06-29 10:00:50 +0300
committervitalyisaev <vitalyisaev@yandex-team.com>2023-06-29 10:00:50 +0300
commit6ffe9e53658409f212834330e13564e4952558f6 (patch)
tree85b1e00183517648b228aafa7c8fb07f5276f419 /contrib/libs/llvm14/lib/Object/COFFImportFile.cpp
parent726057070f9c5a91fc10fde0d5024913d10f1ab9 (diff)
downloadydb-6ffe9e53658409f212834330e13564e4952558f6.tar.gz
YQ Connector: support managed ClickHouse
Со стороны dqrun можно обратиться к инстансу коннектора, который работает на streaming стенде, и извлечь данные из облачного CH.
Diffstat (limited to 'contrib/libs/llvm14/lib/Object/COFFImportFile.cpp')
-rw-r--r--contrib/libs/llvm14/lib/Object/COFFImportFile.cpp625
1 files changed, 625 insertions, 0 deletions
diff --git a/contrib/libs/llvm14/lib/Object/COFFImportFile.cpp b/contrib/libs/llvm14/lib/Object/COFFImportFile.cpp
new file mode 100644
index 0000000000..69bbf70b43
--- /dev/null
+++ b/contrib/libs/llvm14/lib/Object/COFFImportFile.cpp
@@ -0,0 +1,625 @@
+//===- COFFImportFile.cpp - COFF short import file implementation ---------===//
+//
+// Part of the LLVM Project, under the Apache License v2.0 with LLVM Exceptions.
+// See https://llvm.org/LICENSE.txt for license information.
+// SPDX-License-Identifier: Apache-2.0 WITH LLVM-exception
+//
+//===----------------------------------------------------------------------===//
+//
+// This file defines the writeImportLibrary function.
+//
+//===----------------------------------------------------------------------===//
+
+#include "llvm/Object/COFFImportFile.h"
+#include "llvm/ADT/ArrayRef.h"
+#include "llvm/Object/Archive.h"
+#include "llvm/Object/ArchiveWriter.h"
+#include "llvm/Object/COFF.h"
+#include "llvm/Support/Error.h"
+#include "llvm/Support/Path.h"
+
+#include <cstdint>
+#include <string>
+#include <vector>
+
+using namespace llvm::COFF;
+using namespace llvm::object;
+using namespace llvm;
+
+namespace llvm {
+namespace object {
+
+static bool is32bit(MachineTypes Machine) {
+ switch (Machine) {
+ default:
+ llvm_unreachable("unsupported machine");
+ case IMAGE_FILE_MACHINE_ARM64:
+ case IMAGE_FILE_MACHINE_AMD64:
+ return false;
+ case IMAGE_FILE_MACHINE_ARMNT:
+ case IMAGE_FILE_MACHINE_I386:
+ return true;
+ }
+}
+
+static uint16_t getImgRelRelocation(MachineTypes Machine) {
+ switch (Machine) {
+ default:
+ llvm_unreachable("unsupported machine");
+ case IMAGE_FILE_MACHINE_AMD64:
+ return IMAGE_REL_AMD64_ADDR32NB;
+ case IMAGE_FILE_MACHINE_ARMNT:
+ return IMAGE_REL_ARM_ADDR32NB;
+ case IMAGE_FILE_MACHINE_ARM64:
+ return IMAGE_REL_ARM64_ADDR32NB;
+ case IMAGE_FILE_MACHINE_I386:
+ return IMAGE_REL_I386_DIR32NB;
+ }
+}
+
+template <class T> static void append(std::vector<uint8_t> &B, const T &Data) {
+ size_t S = B.size();
+ B.resize(S + sizeof(T));
+ memcpy(&B[S], &Data, sizeof(T));
+}
+
+static void writeStringTable(std::vector<uint8_t> &B,
+ ArrayRef<const std::string> Strings) {
+ // The COFF string table consists of a 4-byte value which is the size of the
+ // table, including the length field itself. This value is followed by the
+ // string content itself, which is an array of null-terminated C-style
+ // strings. The termination is important as they are referenced to by offset
+ // by the symbol entity in the file format.
+
+ size_t Pos = B.size();
+ size_t Offset = B.size();
+
+ // Skip over the length field, we will fill it in later as we will have
+ // computed the length while emitting the string content itself.
+ Pos += sizeof(uint32_t);
+
+ for (const auto &S : Strings) {
+ B.resize(Pos + S.length() + 1);
+ strcpy(reinterpret_cast<char *>(&B[Pos]), S.c_str());
+ Pos += S.length() + 1;
+ }
+
+ // Backfill the length of the table now that it has been computed.
+ support::ulittle32_t Length(B.size() - Offset);
+ support::endian::write32le(&B[Offset], Length);
+}
+
+static ImportNameType getNameType(StringRef Sym, StringRef ExtName,
+ MachineTypes Machine, bool MinGW) {
+ // A decorated stdcall function in MSVC is exported with the
+ // type IMPORT_NAME, and the exported function name includes the
+ // the leading underscore. In MinGW on the other hand, a decorated
+ // stdcall function still omits the underscore (IMPORT_NAME_NOPREFIX).
+ // See the comment in isDecorated in COFFModuleDefinition.cpp for more
+ // details.
+ if (ExtName.startswith("_") && ExtName.contains('@') && !MinGW)
+ return IMPORT_NAME;
+ if (Sym != ExtName)
+ return IMPORT_NAME_UNDECORATE;
+ if (Machine == IMAGE_FILE_MACHINE_I386 && Sym.startswith("_"))
+ return IMPORT_NAME_NOPREFIX;
+ return IMPORT_NAME;
+}
+
+static Expected<std::string> replace(StringRef S, StringRef From,
+ StringRef To) {
+ size_t Pos = S.find(From);
+
+ // From and To may be mangled, but substrings in S may not.
+ if (Pos == StringRef::npos && From.startswith("_") && To.startswith("_")) {
+ From = From.substr(1);
+ To = To.substr(1);
+ Pos = S.find(From);
+ }
+
+ if (Pos == StringRef::npos) {
+ return make_error<StringError>(
+ StringRef(Twine(S + ": replacing '" + From +
+ "' with '" + To + "' failed").str()), object_error::parse_failed);
+ }
+
+ return (Twine(S.substr(0, Pos)) + To + S.substr(Pos + From.size())).str();
+}
+
+static const std::string NullImportDescriptorSymbolName =
+ "__NULL_IMPORT_DESCRIPTOR";
+
+namespace {
+// This class constructs various small object files necessary to support linking
+// symbols imported from a DLL. The contents are pretty strictly defined and
+// nearly entirely static. The details of the structures files are defined in
+// WINNT.h and the PE/COFF specification.
+class ObjectFactory {
+ using u16 = support::ulittle16_t;
+ using u32 = support::ulittle32_t;
+ MachineTypes Machine;
+ BumpPtrAllocator Alloc;
+ StringRef ImportName;
+ StringRef Library;
+ std::string ImportDescriptorSymbolName;
+ std::string NullThunkSymbolName;
+
+public:
+ ObjectFactory(StringRef S, MachineTypes M)
+ : Machine(M), ImportName(S), Library(S.drop_back(4)),
+ ImportDescriptorSymbolName(("__IMPORT_DESCRIPTOR_" + Library).str()),
+ NullThunkSymbolName(("\x7f" + Library + "_NULL_THUNK_DATA").str()) {}
+
+ // Creates an Import Descriptor. This is a small object file which contains a
+ // reference to the terminators and contains the library name (entry) for the
+ // import name table. It will force the linker to construct the necessary
+ // structure to import symbols from the DLL.
+ NewArchiveMember createImportDescriptor(std::vector<uint8_t> &Buffer);
+
+ // Creates a NULL import descriptor. This is a small object file whcih
+ // contains a NULL import descriptor. It is used to terminate the imports
+ // from a specific DLL.
+ NewArchiveMember createNullImportDescriptor(std::vector<uint8_t> &Buffer);
+
+ // Create a NULL Thunk Entry. This is a small object file which contains a
+ // NULL Import Address Table entry and a NULL Import Lookup Table Entry. It
+ // is used to terminate the IAT and ILT.
+ NewArchiveMember createNullThunk(std::vector<uint8_t> &Buffer);
+
+ // Create a short import file which is described in PE/COFF spec 7. Import
+ // Library Format.
+ NewArchiveMember createShortImport(StringRef Sym, uint16_t Ordinal,
+ ImportType Type, ImportNameType NameType);
+
+ // Create a weak external file which is described in PE/COFF Aux Format 3.
+ NewArchiveMember createWeakExternal(StringRef Sym, StringRef Weak, bool Imp);
+};
+} // namespace
+
+NewArchiveMember
+ObjectFactory::createImportDescriptor(std::vector<uint8_t> &Buffer) {
+ const uint32_t NumberOfSections = 2;
+ const uint32_t NumberOfSymbols = 7;
+ const uint32_t NumberOfRelocations = 3;
+
+ // COFF Header
+ coff_file_header Header{
+ u16(Machine),
+ u16(NumberOfSections),
+ u32(0),
+ u32(sizeof(Header) + (NumberOfSections * sizeof(coff_section)) +
+ // .idata$2
+ sizeof(coff_import_directory_table_entry) +
+ NumberOfRelocations * sizeof(coff_relocation) +
+ // .idata$4
+ (ImportName.size() + 1)),
+ u32(NumberOfSymbols),
+ u16(0),
+ u16(is32bit(Machine) ? IMAGE_FILE_32BIT_MACHINE : C_Invalid),
+ };
+ append(Buffer, Header);
+
+ // Section Header Table
+ const coff_section SectionTable[NumberOfSections] = {
+ {{'.', 'i', 'd', 'a', 't', 'a', '$', '2'},
+ u32(0),
+ u32(0),
+ u32(sizeof(coff_import_directory_table_entry)),
+ u32(sizeof(coff_file_header) + NumberOfSections * sizeof(coff_section)),
+ u32(sizeof(coff_file_header) + NumberOfSections * sizeof(coff_section) +
+ sizeof(coff_import_directory_table_entry)),
+ u32(0),
+ u16(NumberOfRelocations),
+ u16(0),
+ u32(IMAGE_SCN_ALIGN_4BYTES | IMAGE_SCN_CNT_INITIALIZED_DATA |
+ IMAGE_SCN_MEM_READ | IMAGE_SCN_MEM_WRITE)},
+ {{'.', 'i', 'd', 'a', 't', 'a', '$', '6'},
+ u32(0),
+ u32(0),
+ u32(ImportName.size() + 1),
+ u32(sizeof(coff_file_header) + NumberOfSections * sizeof(coff_section) +
+ sizeof(coff_import_directory_table_entry) +
+ NumberOfRelocations * sizeof(coff_relocation)),
+ u32(0),
+ u32(0),
+ u16(0),
+ u16(0),
+ u32(IMAGE_SCN_ALIGN_2BYTES | IMAGE_SCN_CNT_INITIALIZED_DATA |
+ IMAGE_SCN_MEM_READ | IMAGE_SCN_MEM_WRITE)},
+ };
+ append(Buffer, SectionTable);
+
+ // .idata$2
+ const coff_import_directory_table_entry ImportDescriptor{
+ u32(0), u32(0), u32(0), u32(0), u32(0),
+ };
+ append(Buffer, ImportDescriptor);
+
+ const coff_relocation RelocationTable[NumberOfRelocations] = {
+ {u32(offsetof(coff_import_directory_table_entry, NameRVA)), u32(2),
+ u16(getImgRelRelocation(Machine))},
+ {u32(offsetof(coff_import_directory_table_entry, ImportLookupTableRVA)),
+ u32(3), u16(getImgRelRelocation(Machine))},
+ {u32(offsetof(coff_import_directory_table_entry, ImportAddressTableRVA)),
+ u32(4), u16(getImgRelRelocation(Machine))},
+ };
+ append(Buffer, RelocationTable);
+
+ // .idata$6
+ auto S = Buffer.size();
+ Buffer.resize(S + ImportName.size() + 1);
+ memcpy(&Buffer[S], ImportName.data(), ImportName.size());
+ Buffer[S + ImportName.size()] = '\0';
+
+ // Symbol Table
+ coff_symbol16 SymbolTable[NumberOfSymbols] = {
+ {{{0, 0, 0, 0, 0, 0, 0, 0}},
+ u32(0),
+ u16(1),
+ u16(0),
+ IMAGE_SYM_CLASS_EXTERNAL,
+ 0},
+ {{{'.', 'i', 'd', 'a', 't', 'a', '$', '2'}},
+ u32(0),
+ u16(1),
+ u16(0),
+ IMAGE_SYM_CLASS_SECTION,
+ 0},
+ {{{'.', 'i', 'd', 'a', 't', 'a', '$', '6'}},
+ u32(0),
+ u16(2),
+ u16(0),
+ IMAGE_SYM_CLASS_STATIC,
+ 0},
+ {{{'.', 'i', 'd', 'a', 't', 'a', '$', '4'}},
+ u32(0),
+ u16(0),
+ u16(0),
+ IMAGE_SYM_CLASS_SECTION,
+ 0},
+ {{{'.', 'i', 'd', 'a', 't', 'a', '$', '5'}},
+ u32(0),
+ u16(0),
+ u16(0),
+ IMAGE_SYM_CLASS_SECTION,
+ 0},
+ {{{0, 0, 0, 0, 0, 0, 0, 0}},
+ u32(0),
+ u16(0),
+ u16(0),
+ IMAGE_SYM_CLASS_EXTERNAL,
+ 0},
+ {{{0, 0, 0, 0, 0, 0, 0, 0}},
+ u32(0),
+ u16(0),
+ u16(0),
+ IMAGE_SYM_CLASS_EXTERNAL,
+ 0},
+ };
+ // TODO: Name.Offset.Offset here and in the all similar places below
+ // suggests a names refactoring. Maybe StringTableOffset.Value?
+ SymbolTable[0].Name.Offset.Offset =
+ sizeof(uint32_t);
+ SymbolTable[5].Name.Offset.Offset =
+ sizeof(uint32_t) + ImportDescriptorSymbolName.length() + 1;
+ SymbolTable[6].Name.Offset.Offset =
+ sizeof(uint32_t) + ImportDescriptorSymbolName.length() + 1 +
+ NullImportDescriptorSymbolName.length() + 1;
+ append(Buffer, SymbolTable);
+
+ // String Table
+ writeStringTable(Buffer,
+ {ImportDescriptorSymbolName, NullImportDescriptorSymbolName,
+ NullThunkSymbolName});
+
+ StringRef F{reinterpret_cast<const char *>(Buffer.data()), Buffer.size()};
+ return {MemoryBufferRef(F, ImportName)};
+}
+
+NewArchiveMember
+ObjectFactory::createNullImportDescriptor(std::vector<uint8_t> &Buffer) {
+ const uint32_t NumberOfSections = 1;
+ const uint32_t NumberOfSymbols = 1;
+
+ // COFF Header
+ coff_file_header Header{
+ u16(Machine),
+ u16(NumberOfSections),
+ u32(0),
+ u32(sizeof(Header) + (NumberOfSections * sizeof(coff_section)) +
+ // .idata$3
+ sizeof(coff_import_directory_table_entry)),
+ u32(NumberOfSymbols),
+ u16(0),
+ u16(is32bit(Machine) ? IMAGE_FILE_32BIT_MACHINE : C_Invalid),
+ };
+ append(Buffer, Header);
+
+ // Section Header Table
+ const coff_section SectionTable[NumberOfSections] = {
+ {{'.', 'i', 'd', 'a', 't', 'a', '$', '3'},
+ u32(0),
+ u32(0),
+ u32(sizeof(coff_import_directory_table_entry)),
+ u32(sizeof(coff_file_header) +
+ (NumberOfSections * sizeof(coff_section))),
+ u32(0),
+ u32(0),
+ u16(0),
+ u16(0),
+ u32(IMAGE_SCN_ALIGN_4BYTES | IMAGE_SCN_CNT_INITIALIZED_DATA |
+ IMAGE_SCN_MEM_READ | IMAGE_SCN_MEM_WRITE)},
+ };
+ append(Buffer, SectionTable);
+
+ // .idata$3
+ const coff_import_directory_table_entry ImportDescriptor{
+ u32(0), u32(0), u32(0), u32(0), u32(0),
+ };
+ append(Buffer, ImportDescriptor);
+
+ // Symbol Table
+ coff_symbol16 SymbolTable[NumberOfSymbols] = {
+ {{{0, 0, 0, 0, 0, 0, 0, 0}},
+ u32(0),
+ u16(1),
+ u16(0),
+ IMAGE_SYM_CLASS_EXTERNAL,
+ 0},
+ };
+ SymbolTable[0].Name.Offset.Offset = sizeof(uint32_t);
+ append(Buffer, SymbolTable);
+
+ // String Table
+ writeStringTable(Buffer, {NullImportDescriptorSymbolName});
+
+ StringRef F{reinterpret_cast<const char *>(Buffer.data()), Buffer.size()};
+ return {MemoryBufferRef(F, ImportName)};
+}
+
+NewArchiveMember ObjectFactory::createNullThunk(std::vector<uint8_t> &Buffer) {
+ const uint32_t NumberOfSections = 2;
+ const uint32_t NumberOfSymbols = 1;
+ uint32_t VASize = is32bit(Machine) ? 4 : 8;
+
+ // COFF Header
+ coff_file_header Header{
+ u16(Machine),
+ u16(NumberOfSections),
+ u32(0),
+ u32(sizeof(Header) + (NumberOfSections * sizeof(coff_section)) +
+ // .idata$5
+ VASize +
+ // .idata$4
+ VASize),
+ u32(NumberOfSymbols),
+ u16(0),
+ u16(is32bit(Machine) ? IMAGE_FILE_32BIT_MACHINE : C_Invalid),
+ };
+ append(Buffer, Header);
+
+ // Section Header Table
+ const coff_section SectionTable[NumberOfSections] = {
+ {{'.', 'i', 'd', 'a', 't', 'a', '$', '5'},
+ u32(0),
+ u32(0),
+ u32(VASize),
+ u32(sizeof(coff_file_header) + NumberOfSections * sizeof(coff_section)),
+ u32(0),
+ u32(0),
+ u16(0),
+ u16(0),
+ u32((is32bit(Machine) ? IMAGE_SCN_ALIGN_4BYTES
+ : IMAGE_SCN_ALIGN_8BYTES) |
+ IMAGE_SCN_CNT_INITIALIZED_DATA | IMAGE_SCN_MEM_READ |
+ IMAGE_SCN_MEM_WRITE)},
+ {{'.', 'i', 'd', 'a', 't', 'a', '$', '4'},
+ u32(0),
+ u32(0),
+ u32(VASize),
+ u32(sizeof(coff_file_header) + NumberOfSections * sizeof(coff_section) +
+ VASize),
+ u32(0),
+ u32(0),
+ u16(0),
+ u16(0),
+ u32((is32bit(Machine) ? IMAGE_SCN_ALIGN_4BYTES
+ : IMAGE_SCN_ALIGN_8BYTES) |
+ IMAGE_SCN_CNT_INITIALIZED_DATA | IMAGE_SCN_MEM_READ |
+ IMAGE_SCN_MEM_WRITE)},
+ };
+ append(Buffer, SectionTable);
+
+ // .idata$5, ILT
+ append(Buffer, u32(0));
+ if (!is32bit(Machine))
+ append(Buffer, u32(0));
+
+ // .idata$4, IAT
+ append(Buffer, u32(0));
+ if (!is32bit(Machine))
+ append(Buffer, u32(0));
+
+ // Symbol Table
+ coff_symbol16 SymbolTable[NumberOfSymbols] = {
+ {{{0, 0, 0, 0, 0, 0, 0, 0}},
+ u32(0),
+ u16(1),
+ u16(0),
+ IMAGE_SYM_CLASS_EXTERNAL,
+ 0},
+ };
+ SymbolTable[0].Name.Offset.Offset = sizeof(uint32_t);
+ append(Buffer, SymbolTable);
+
+ // String Table
+ writeStringTable(Buffer, {NullThunkSymbolName});
+
+ StringRef F{reinterpret_cast<const char *>(Buffer.data()), Buffer.size()};
+ return {MemoryBufferRef{F, ImportName}};
+}
+
+NewArchiveMember ObjectFactory::createShortImport(StringRef Sym,
+ uint16_t Ordinal,
+ ImportType ImportType,
+ ImportNameType NameType) {
+ size_t ImpSize = ImportName.size() + Sym.size() + 2; // +2 for NULs
+ size_t Size = sizeof(coff_import_header) + ImpSize;
+ char *Buf = Alloc.Allocate<char>(Size);
+ memset(Buf, 0, Size);
+ char *P = Buf;
+
+ // Write short import library.
+ auto *Imp = reinterpret_cast<coff_import_header *>(P);
+ P += sizeof(*Imp);
+ Imp->Sig2 = 0xFFFF;
+ Imp->Machine = Machine;
+ Imp->SizeOfData = ImpSize;
+ if (Ordinal > 0)
+ Imp->OrdinalHint = Ordinal;
+ Imp->TypeInfo = (NameType << 2) | ImportType;
+
+ // Write symbol name and DLL name.
+ memcpy(P, Sym.data(), Sym.size());
+ P += Sym.size() + 1;
+ memcpy(P, ImportName.data(), ImportName.size());
+
+ return {MemoryBufferRef(StringRef(Buf, Size), ImportName)};
+}
+
+NewArchiveMember ObjectFactory::createWeakExternal(StringRef Sym,
+ StringRef Weak, bool Imp) {
+ std::vector<uint8_t> Buffer;
+ const uint32_t NumberOfSections = 1;
+ const uint32_t NumberOfSymbols = 5;
+
+ // COFF Header
+ coff_file_header Header{
+ u16(Machine),
+ u16(NumberOfSections),
+ u32(0),
+ u32(sizeof(Header) + (NumberOfSections * sizeof(coff_section))),
+ u32(NumberOfSymbols),
+ u16(0),
+ u16(0),
+ };
+ append(Buffer, Header);
+
+ // Section Header Table
+ const coff_section SectionTable[NumberOfSections] = {
+ {{'.', 'd', 'r', 'e', 'c', 't', 'v', 'e'},
+ u32(0),
+ u32(0),
+ u32(0),
+ u32(0),
+ u32(0),
+ u32(0),
+ u16(0),
+ u16(0),
+ u32(IMAGE_SCN_LNK_INFO | IMAGE_SCN_LNK_REMOVE)}};
+ append(Buffer, SectionTable);
+
+ // Symbol Table
+ coff_symbol16 SymbolTable[NumberOfSymbols] = {
+ {{{'@', 'c', 'o', 'm', 'p', '.', 'i', 'd'}},
+ u32(0),
+ u16(0xFFFF),
+ u16(0),
+ IMAGE_SYM_CLASS_STATIC,
+ 0},
+ {{{'@', 'f', 'e', 'a', 't', '.', '0', '0'}},
+ u32(0),
+ u16(0xFFFF),
+ u16(0),
+ IMAGE_SYM_CLASS_STATIC,
+ 0},
+ {{{0, 0, 0, 0, 0, 0, 0, 0}},
+ u32(0),
+ u16(0),
+ u16(0),
+ IMAGE_SYM_CLASS_EXTERNAL,
+ 0},
+ {{{0, 0, 0, 0, 0, 0, 0, 0}},
+ u32(0),
+ u16(0),
+ u16(0),
+ IMAGE_SYM_CLASS_WEAK_EXTERNAL,
+ 1},
+ {{{2, 0, 0, 0, IMAGE_WEAK_EXTERN_SEARCH_ALIAS, 0, 0, 0}},
+ u32(0),
+ u16(0),
+ u16(0),
+ IMAGE_SYM_CLASS_NULL,
+ 0},
+ };
+ SymbolTable[2].Name.Offset.Offset = sizeof(uint32_t);
+
+ //__imp_ String Table
+ StringRef Prefix = Imp ? "__imp_" : "";
+ SymbolTable[3].Name.Offset.Offset =
+ sizeof(uint32_t) + Sym.size() + Prefix.size() + 1;
+ append(Buffer, SymbolTable);
+ writeStringTable(Buffer, {(Prefix + Sym).str(),
+ (Prefix + Weak).str()});
+
+ // Copied here so we can still use writeStringTable
+ char *Buf = Alloc.Allocate<char>(Buffer.size());
+ memcpy(Buf, Buffer.data(), Buffer.size());
+ return {MemoryBufferRef(StringRef(Buf, Buffer.size()), ImportName)};
+}
+
+Error writeImportLibrary(StringRef ImportName, StringRef Path,
+ ArrayRef<COFFShortExport> Exports,
+ MachineTypes Machine, bool MinGW) {
+
+ std::vector<NewArchiveMember> Members;
+ ObjectFactory OF(llvm::sys::path::filename(ImportName), Machine);
+
+ std::vector<uint8_t> ImportDescriptor;
+ Members.push_back(OF.createImportDescriptor(ImportDescriptor));
+
+ std::vector<uint8_t> NullImportDescriptor;
+ Members.push_back(OF.createNullImportDescriptor(NullImportDescriptor));
+
+ std::vector<uint8_t> NullThunk;
+ Members.push_back(OF.createNullThunk(NullThunk));
+
+ for (COFFShortExport E : Exports) {
+ if (E.Private)
+ continue;
+
+ ImportType ImportType = IMPORT_CODE;
+ if (E.Data)
+ ImportType = IMPORT_DATA;
+ if (E.Constant)
+ ImportType = IMPORT_CONST;
+
+ StringRef SymbolName = E.SymbolName.empty() ? E.Name : E.SymbolName;
+ ImportNameType NameType = E.Noname
+ ? IMPORT_ORDINAL
+ : getNameType(SymbolName, E.Name,
+ Machine, MinGW);
+ Expected<std::string> Name = E.ExtName.empty()
+ ? std::string(SymbolName)
+ : replace(SymbolName, E.Name, E.ExtName);
+
+ if (!Name)
+ return Name.takeError();
+
+ if (!E.AliasTarget.empty() && *Name != E.AliasTarget) {
+ Members.push_back(OF.createWeakExternal(E.AliasTarget, *Name, false));
+ Members.push_back(OF.createWeakExternal(E.AliasTarget, *Name, true));
+ continue;
+ }
+
+ Members.push_back(
+ OF.createShortImport(*Name, E.Ordinal, ImportType, NameType));
+ }
+
+ return writeArchive(Path, Members, /*WriteSymtab*/ true,
+ object::Archive::K_GNU,
+ /*Deterministic*/ true, /*Thin*/ false);
+}
+
+} // namespace object
+} // namespace llvm