[PATCH] D13675: [ELF2/Linkerscript] Implement parsing of OUTPUT_ARCH() command

[Davide Italiano via llvm-commits]

davide created this revision.
davide added reviewers: ruiu, rafael.
davide added a subscriber: llvm-commits.

Needed by FreeBSD kernel linker script.

http://reviews.llvm.org/D13675

Files:
  ELF/LinkerScript.cpp
  test/elf2/linkerscript-outputarch.s

Index: test/elf2/linkerscript-outputarch.s
===================================================================
--- test/elf2/linkerscript-outputarch.s
+++ test/elf2/linkerscript-outputarch.s
@@ -0,0 +1,10 @@
+# REQUIRES: x86
+# RUN: echo "OUTPUT_ARCH(x)" > %t.script
+# RUN: llvm-mc -filetype=obj -triple=x86_64-unknown-freebsd %s -o %t1
+# RUN: ld.lld2 -shared -o %t2 %t1 %t.script
+# RUN: llvm-readobj %t2 > /dev/null
+
+# RUN: echo "OUTPUT_ARCH(x, y)" > %t.script
+# RUN: llvm-mc -filetype=obj -triple=x86_64-unknown-freebsd %s -o %t1
+# RUN: not ld.lld2 -shared -o %t2 %t1 %t.script
+# RUN: llvm-readobj %t2 > /dev/null
Index: ELF/LinkerScript.cpp
===================================================================
--- ELF/LinkerScript.cpp
+++ ELF/LinkerScript.cpp
@@ -45,6 +45,7 @@
   void readGroup();
   void readInclude();
   void readOutput();
+  void readOutputArch();
   void readOutputFormat();
   void readSearchDir();
 
@@ -65,6 +66,8 @@
       readInclude();
     } else if (Tok == "OUTPUT") {
       readOutput();
+    } else if (Tok == "OUTPUT_ARCH") {
+      readOutputArch();
     } else if (Tok == "OUTPUT_FORMAT") {
       readOutputFormat();
     } else if (Tok == "SEARCH_DIR") {
@@ -208,6 +211,13 @@
   expect(")");
 }
 
+void LinkerScript::readOutputArch() {
+  // Error checking only for now.
+  expect("(");
+  next();
+  expect(")");
+}
+
 void LinkerScript::readOutputFormat() {
   // Error checking only for now.
   expect("(");


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