[PECOFF] Support delay-load import table for x86

This patch creates the import address table and sets its
address to the delay-load import table. This also creates
wrapper functions for __delayLoadHelper2.

x86 only for now.

llvm-svn: 219948

1 files changed, 16 insertions, 0 deletions

diff --git a/lld/lib/ReaderWriter/PECOFF/Pass.cpp b/lld/lib/ReaderWriter/PECOFF/Pass.cpp
index e756bf5e627..55c3ef8770e 100644
--- a/lld/lib/ReaderWriter/PECOFF/Pass.cpp
+++ b/lld/lib/ReaderWriter/PECOFF/Pass.cpp
@@ -55,5 +55,21 @@ void addDir32NBReloc(COFFBaseDefinedAtom *atom, const Atom *target,
   }
 }
 
+void addRel32Reloc(COFFBaseDefinedAtom *atom, const Atom *target,
+                   llvm::COFF::MachineTypes machine, size_t offsetInAtom) {
+  switch (machine) {
+  case llvm::COFF::IMAGE_FILE_MACHINE_I386:
+    addReloc(atom, target, offsetInAtom, Reference::KindArch::x86,
+             llvm::COFF::IMAGE_REL_I386_REL32);
+    return;
+  case llvm::COFF::IMAGE_FILE_MACHINE_AMD64:
+    addReloc(atom, target, offsetInAtom, Reference::KindArch::x86_64,
+             llvm::COFF::IMAGE_REL_AMD64_REL32);
+    return;
+  default:
+    llvm_unreachable("unsupported machine type");
+  }
+}
+
 } // end namespace pecoff
 } // end namespace lld