[ELF/Linkerscript] Define an absolute if we find an undefined.
Otherwhise undefined references to symbols defined in linker scripts
are never resolved.
Differential Revision: https://reviews.llvm.org/D22664
llvm-svn: 276536
diff --git a/lld/ELF/LinkerScript.cpp b/lld/ELF/LinkerScript.cpp
index 64a6849..b95287a 100644
--- a/lld/ELF/LinkerScript.cpp
+++ b/lld/ELF/LinkerScript.cpp
@@ -532,7 +532,8 @@
if (!Cmd || Cmd->Name == ".")
continue;
- if (Symtab<ELFT>::X->find(Cmd->Name) == nullptr)
+ SymbolBody *B = Symtab<ELFT>::X->find(Cmd->Name);
+ if (!B || B->isUndefined())
Symtab<ELFT>::X->addAbsolute(Cmd->Name,
Cmd->Hidden ? STV_HIDDEN : STV_DEFAULT);
else
diff --git a/lld/test/ELF/linkerscript-undef.s b/lld/test/ELF/linkerscript-undef.s
new file mode 100644
index 0000000..85ad076
--- /dev/null
+++ b/lld/test/ELF/linkerscript-undef.s
@@ -0,0 +1,11 @@
+# REQUIRES: x86
+# RUN: llvm-mc -filetype=obj -triple=x86_64-unknown-linux %s -o %t
+
+# RUN: echo "SECTIONS { patatino = 0x1234; }" > %t.script
+# RUN: ld.lld -o %t1 --script %t.script %t
+# RUN: llvm-objdump -t %t1 | FileCheck %s
+# CHECK: 0000000000001234 *ABS* 00000000 patatino
+
+.global _start
+_start:
+ call patatino