Make lld able to handle gold's -r output.

This is still not sufficient for lld to handle its own output when a
fde points to a discarded section. I am investigating if it is better
to change the -r output or make lld able to read the current version.

llvm-svn: 295141

2 files changed, 7 insertions, 3 deletions

diff --git a/lld/ELF/OutputSections.cpp b/lld/ELF/OutputSections.cpp
index 9e638ad17de..25ea64a3068 100644
--- a/lld/ELF/OutputSections.cpp
+++ b/lld/ELF/OutputSections.cpp
@@ -316,7 +316,7 @@ bool EhOutputSection<ELFT>::isFdeLive(EhSectionPiece &Piece,
   auto *Sec = cast<EhInputSection<ELFT>>(Piece.ID);
   unsigned FirstRelI = Piece.FirstRelocation;
   if (FirstRelI == (unsigned)-1)
-    fatal(toString(Sec) + ": FDE doesn't reference another section");
+    return false;
   const RelTy &Rel = Rels[FirstRelI];
   SymbolBody &B = Sec->getFile()->getRelocTargetSym(Rel);
   auto *D = dyn_cast<DefinedRegular<ELFT>>(&B);
diff --git a/lld/test/ELF/invalid-fde-rel.s b/lld/test/ELF/invalid-fde-rel.s
index 9fb73d2158d..f43b9da3003 100644
--- a/lld/test/ELF/invalid-fde-rel.s
+++ b/lld/test/ELF/invalid-fde-rel.s
@@ -1,7 +1,11 @@
 // REQUIRES: x86
 
 // RUN: llvm-mc -filetype=obj -triple=x86_64-pc-linux %s -o %t
-// RUN: not ld.lld %t -o %t2 2>&1 | FileCheck %s
+// RUN: ld.lld %t -o %t2
+// RUN: llvm-objdump -h %t2 | FileCheck %s
+
+// This resembles what gold -r produces when it discards the section
+// the fde points to.
 
         .section .eh_frame
         .long 0x14
@@ -29,4 +33,4 @@
         .long 0x0
         .long 0x0
 
-// CHECK: FDE doesn't reference another section
+// CHECK:  1 .eh_frame     00000018