Boilerplate for producing XCOFF object files from the PowerPC backend.

Stubs out a number of the classes needed to produce a new object file format
(XCOFF) for the powerpc-aix target. For testing input is an empty module which
produces an object file with just a file header.

Differential Revision: https://reviews.llvm.org/D61694

llvm-svn: 365541

1 files changed, 11 insertions, 2 deletions

diff --git a/llvm/lib/MC/MCObjectFileInfo.cpp b/llvm/lib/MC/MCObjectFileInfo.cpp
index 0faa236c153..9f555abe140 100644
--- a/llvm/lib/MC/MCObjectFileInfo.cpp
+++ b/llvm/lib/MC/MCObjectFileInfo.cpp
@@ -18,6 +18,7 @@
 #include "llvm/MC/MCSectionELF.h"
 #include "llvm/MC/MCSectionMachO.h"
 #include "llvm/MC/MCSectionWasm.h"
+#include "llvm/MC/MCSectionXCOFF.h"
 
 using namespace llvm;
 
@@ -761,6 +762,15 @@ void MCObjectFileInfo::initWasmMCObjectFileInfo(const Triple &T) {
   // TODO: Define more sections.
 }
 
+void MCObjectFileInfo::initXCOFFMCObjectFileInfo(const Triple &T) {
+  // The default csect for program code. Functions without a specified section
+  // get placed into this csect. The choice of csect name is not a property of
+  // the ABI or object file format. For example, the XL compiler uses an unnamed
+  // csect for program code.
+  TextSection = Ctx->getXCOFFSection(
+      ".text", XCOFF::StorageMappingClass::XMC_PR, SectionKind::getText());
+}
+
 void MCObjectFileInfo::InitMCObjectFileInfo(const Triple &TheTriple, bool PIC,
                                             MCContext &ctx,
                                             bool LargeCodeModel) {
@@ -809,8 +819,7 @@ void MCObjectFileInfo::InitMCObjectFileInfo(const Triple &TheTriple, bool PIC,
     break;
   case Triple::XCOFF:
     Env = IsXCOFF;
-    // TODO: Initialize MCObjectFileInfo for XCOFF format when
-    // MCSectionXCOFF is ready.
+    initXCOFFMCObjectFileInfo(TT);
     break;
   case Triple::UnknownObjectFormat:
     report_fatal_error("Cannot initialize MC for unknown object file format.");