Index: test/COFF/Inputs/hello64.def
===================================================================
--- /dev/null
+++ test/COFF/Inputs/hello64.def
@@ -0,0 +1,4 @@
+LIBRARY hellolib64.dll
+EXPORTS
+MessageBoxA
+ExitProcess
\ No newline at end of file
Index: test/COFF/Inputs/hello64.obj.yaml
===================================================================
--- /dev/null
+++ test/COFF/Inputs/hello64.obj.yaml
@@ -0,0 +1,110 @@
+---
+header:
+  Machine:         IMAGE_FILE_MACHINE_AMD64
+  Characteristics: [  ]
+sections:
+  - Name:            '.text$mn'
+    Characteristics: [ IMAGE_SCN_CNT_CODE, IMAGE_SCN_MEM_EXECUTE, IMAGE_SCN_MEM_READ ]
+    Alignment:       16
+    SectionData:     4883EC2848C7C100000000488D15000000004C8D050000000041B900000000E800000000B900000000E800000000
+    Relocations:
+      - VirtualAddress:  14
+        SymbolName:      message
+        Type:            IMAGE_REL_AMD64_REL32
+      - VirtualAddress:  21
+        SymbolName:      caption
+        Type:            IMAGE_REL_AMD64_REL32
+      - VirtualAddress:  32
+        SymbolName:      MessageBoxA
+        Type:            IMAGE_REL_AMD64_REL32
+      - VirtualAddress:  42
+        SymbolName:      ExitProcess
+        Type:            IMAGE_REL_AMD64_REL32
+  - Name:            .data
+    Characteristics: [ IMAGE_SCN_CNT_INITIALIZED_DATA, IMAGE_SCN_MEM_READ, IMAGE_SCN_MEM_WRITE ]
+    Alignment:       16
+    SectionData:     48656C6C6F0048656C6C6F20576F726C6400
+  - Name:            '.debug$S'
+    Characteristics: [ IMAGE_SCN_CNT_INITIALIZED_DATA, IMAGE_SCN_MEM_DISCARDABLE, IMAGE_SCN_MEM_READ ]
+    Alignment:       1
+    SectionData:     04000000F1000000830000004800011100000000433A5C63796777696E5C686F6D655C727569755C6C6C766D5C746F6F6C735C6C6C645C746573745C7065636F66665C496E707574735C68656C6C6F36342E6F626A0037003C1103020000D00000000000000000000C0000000D5201004D6963726F736F667420285229204D6163726F20417373656D626C6572000000
+symbols:
+  - Name:            '@comp.id'
+    Value:           14635533
+    SectionNumber:   65535
+    SimpleType:      IMAGE_SYM_TYPE_NULL
+    ComplexType:     IMAGE_SYM_DTYPE_NULL
+    StorageClass:    IMAGE_SYM_CLASS_STATIC
+  - Name:            '@feat.00'
+    Value:           16
+    SectionNumber:   65535
+    SimpleType:      IMAGE_SYM_TYPE_NULL
+    ComplexType:     IMAGE_SYM_DTYPE_NULL
+    StorageClass:    IMAGE_SYM_CLASS_STATIC
+  - Name:            '.text$mn'
+    Value:           0
+    SectionNumber:   1
+    SimpleType:      IMAGE_SYM_TYPE_NULL
+    ComplexType:     IMAGE_SYM_DTYPE_NULL
+    StorageClass:    IMAGE_SYM_CLASS_STATIC
+    SectionDefinition:
+      Length:          46
+      NumberOfRelocations: 4
+      NumberOfLinenumbers: 0
+      CheckSum:        0
+      Number:          0
+  - Name:            .data
+    Value:           0
+    SectionNumber:   2
+    SimpleType:      IMAGE_SYM_TYPE_NULL
+    ComplexType:     IMAGE_SYM_DTYPE_NULL
+    StorageClass:    IMAGE_SYM_CLASS_STATIC
+    SectionDefinition:
+      Length:          18
+      NumberOfRelocations: 0
+      NumberOfLinenumbers: 0
+      CheckSum:        0
+      Number:          0
+  - Name:            '.debug$S'
+    Value:           0
+    SectionNumber:   3
+    SimpleType:      IMAGE_SYM_TYPE_NULL
+    ComplexType:     IMAGE_SYM_DTYPE_NULL
+    StorageClass:    IMAGE_SYM_CLASS_STATIC
+    SectionDefinition:
+      Length:          144
+      NumberOfRelocations: 0
+      NumberOfLinenumbers: 0
+      CheckSum:        0
+      Number:          0
+  - Name:            ExitProcess
+    Value:           0
+    SectionNumber:   0
+    SimpleType:      IMAGE_SYM_TYPE_NULL
+    ComplexType:     IMAGE_SYM_DTYPE_NULL
+    StorageClass:    IMAGE_SYM_CLASS_EXTERNAL
+  - Name:            MessageBoxA
+    Value:           0
+    SectionNumber:   0
+    SimpleType:      IMAGE_SYM_TYPE_NULL
+    ComplexType:     IMAGE_SYM_DTYPE_NULL
+    StorageClass:    IMAGE_SYM_CLASS_EXTERNAL
+  - Name:            message
+    Value:           6
+    SectionNumber:   2
+    SimpleType:      IMAGE_SYM_TYPE_NULL
+    ComplexType:     IMAGE_SYM_DTYPE_NULL
+    StorageClass:    IMAGE_SYM_CLASS_STATIC
+  - Name:            caption
+    Value:           0
+    SectionNumber:   2
+    SimpleType:      IMAGE_SYM_TYPE_NULL
+    ComplexType:     IMAGE_SYM_DTYPE_NULL
+    StorageClass:    IMAGE_SYM_CLASS_STATIC
+  - Name:            main
+    Value:           0
+    SectionNumber:   1
+    SimpleType:      IMAGE_SYM_TYPE_NULL
+    ComplexType:     IMAGE_SYM_DTYPE_FUNCTION
+    StorageClass:    IMAGE_SYM_CLASS_EXTERNAL
+...
Index: test/COFF/hello64.test
===================================================================
--- /dev/null
+++ test/COFF/hello64.test
@@ -0,0 +1,22 @@
+# REQUIRES: x86
+
+# RUN: yaml2obj %p/Inputs/hello64.obj.yaml > %t.obj
+
+# RUN: lld -flavor link2 /out:%t.exe /subsystem:windows /machine:x64 \
+# RUN:   /entry:main -- %t.obj %p/Inputs/hello64gnu.lib
+# RUN: llvm-objdump -disassemble %t.exe | FileCheck %s
+
+CHECK: 6000: 48 83 ec 28             subq    $40, %rsp
+CHECK: 6004: 48 c7 c1 00 00 00 00    movq    $0, %rcx
+CHECK: 600b: 48 8d 15 f4 af ff ff    leaq    -20492(%rip), %rdx
+CHECK: 6012: 4c 8d 05 e7 af ff ff    leaq    -20505(%rip), %r8
+CHECK: 6019: 41 b9 00 00 00 00       movl    $0, %r9d
+CHECK: 601f: e8 12 00 00 00          callq   18
+CHECK: 6024: b9 00 00 00 00          movl    $0, %ecx
+CHECK: 6029: e8 00 00 00 00          callq   0
+CHECK: 602e: ff 25 cc cf ff ff       jmpq    *-12340(%rip)
+CHECK: 6034: cc                      int3
+CHECK: 6035: cc                      int3
+CHECK: 6036: ff 25 cc cf ff ff       jmpq    *-12340(%rip)
+CHECK: 603c: cc                      int3
+CHECK: 603d: cc                      int3