[ELF] Handle copy relocations for PC32.

This will eventually need to be refactored to better handle COPY relocations,
as other relocations can also generate them. I'm not yet sure the exact
circumstances in which they are needed yet.

llvm-svn: 191567

3 files changed, 7 insertions, 1 deletions

diff --git a/lld/lib/ReaderWriter/ELF/X86_64/X86_64LinkingContext.cpp b/lld/lib/ReaderWriter/ELF/X86_64/X86_64LinkingContext.cpp
index 2ef6f388a83..33c919eefd9 100644
--- a/lld/lib/ReaderWriter/ELF/X86_64/X86_64LinkingContext.cpp
+++ b/lld/lib/ReaderWriter/ELF/X86_64/X86_64LinkingContext.cpp
@@ -407,7 +407,10 @@ public:
     if (auto sla = dyn_cast<SharedLibraryAtom>(ref.target())) {
       if (sla->type() == SharedLibraryAtom::Type::Code)
         return handlePLT32(ref);
-      else
+      else if (sla->type() == SharedLibraryAtom::Type::Data) {
+        const_cast<Reference &>(ref).setTarget(getObjectEntry(sla));
+        return error_code::success();
+      } else
         return handleGOTPCREL(ref);
     }
     return handleIFUNC(ref);
diff --git a/lld/test/elf/Inputs/undef-pc32.o b/lld/test/elf/Inputs/undef-pc32.o
new file mode 100644
index 00000000000..954916d5999
--- /dev/null
+++ b/lld/test/elf/Inputs/undef-pc32.o
diff --git a/lld/test/elf/undef-from-main-dso.test b/lld/test/elf/undef-from-main-dso.test
index c1e7962f5b5..64c3d2e8fb7 100644
--- a/lld/test/elf/undef-from-main-dso.test
+++ b/lld/test/elf/undef-from-main-dso.test
@@ -1,6 +1,9 @@
 RUN: lld -flavor gnu -e main -o %t -L%p/Inputs -lundef %p/Inputs/undef.o
 RUN: llvm-readobj -relocations -symbols %t | FileCheck %s
 
+RUN: lld -flavor gnu -e main -o %t -L%p/Inputs -lundef %p/Inputs/undef-pc32.o
+RUN: llvm-readobj -relocations -symbols %t | FileCheck %s
+
 # DSO source code:
 # int x[2] = { 1, 2 };
 #