[PECOFF] Parse /dll command line option.

llvm-svn: 197123

3 files changed, 12 insertions, 1 deletions

diff --git a/lld/include/lld/ReaderWriter/PECOFFLinkingContext.h b/lld/include/lld/ReaderWriter/PECOFFLinkingContext.h
index 7bd20988b61..bec8c70c8d9 100644
--- a/lld/include/lld/ReaderWriter/PECOFFLinkingContext.h
+++ b/lld/include/lld/ReaderWriter/PECOFFLinkingContext.h
@@ -250,7 +250,7 @@ protected:
 
 private:
   // The start address for the program. The default value for the executable is
-  // 0x400000, but can be altered using -base command line option.
+  // 0x400000, but can be altered using /base command line option.
   uint64_t _baseAddress;
 
   uint64_t _stackReserve;
diff --git a/lld/lib/Driver/WinLinkDriver.cpp b/lld/lib/Driver/WinLinkDriver.cpp
index 4403876f66c..26fc124dabc 100644
--- a/lld/lib/Driver/WinLinkDriver.cpp
+++ b/lld/lib/Driver/WinLinkDriver.cpp
@@ -679,6 +679,14 @@ WinLinkDriver::parse(int argc, const char *argv[], PECOFFLinkingContext &ctx,
       ctx.setBaseAddress(addr);
       break;
 
+    case OPT_dll:
+      // Parse /dll command line option
+      ctx.setImageType(PECOFFLinkingContext::IMAGE_DLL);
+      // Default base address of a DLL is 0x10000000.
+      if (!parsedArgs->getLastArg(OPT_base))
+        ctx.setBaseAddress(0x10000000);
+      break;
+
     case OPT_stack: {
       // Parse /stack command line option
       uint64_t reserve;
diff --git a/lld/unittests/DriverTests/WinLinkDriverTest.cpp b/lld/unittests/DriverTests/WinLinkDriverTest.cpp
index 95ed663f6c9..cb056246ce8 100644
--- a/lld/unittests/DriverTests/WinLinkDriverTest.cpp
+++ b/lld/unittests/DriverTests/WinLinkDriverTest.cpp
@@ -45,6 +45,7 @@ TEST_F(WinLinkParserTest, Basic) {
   EXPECT_TRUE(_context.getInputSearchPaths().empty());
 
   // Unspecified flags will have default values.
+  EXPECT_EQ(PECOFFLinkingContext::IMAGE_EXE, _context.getImageType());
   EXPECT_EQ(6, _context.getMinOSVersion().majorVersion);
   EXPECT_EQ(0, _context.getMinOSVersion().minorVersion);
   EXPECT_EQ(0x400000U, _context.getBaseAddress());
@@ -377,6 +378,8 @@ TEST_F(WinLinkParserTest, DisallowLib) {
 
 TEST_F(WinLinkParserTest, NoEntry) {
   EXPECT_TRUE(parse("link.exe", "/noentry", "/dll", "a.obj", nullptr));
+  EXPECT_EQ(PECOFFLinkingContext::IMAGE_DLL, _context.getImageType());
+  EXPECT_EQ(0x10000000U, _context.getBaseAddress());
   EXPECT_EQ("", _context.entrySymbolName());
 }