[llvm] r177256 - Windows TLS: Section name prefix to ensure correct order

[Anton Korobeynikov]

Author: asl
Date: Mon Mar 18 03:10:10 2013
New Revision: 177256

URL: http://llvm.org/viewvc/llvm-project?rev=177256&view=rev
Log:
Windows TLS: Section name prefix to ensure correct order
The linker sorts the .tls$<xyz> sections by name, and we need
to make sure any extra sections we produce (e.g. for weak globals) 
always end up between .tls$AAA and .tls$ZZZ, even if the name 
starts with e.g. an underscore.

Patch by David Nadlinger!


Modified:
    llvm/trunk/lib/CodeGen/TargetLoweringObjectFileImpl.cpp

Modified: llvm/trunk/lib/CodeGen/TargetLoweringObjectFileImpl.cpp
URL: http://llvm.org/viewvc/llvm-project/llvm/trunk/lib/CodeGen/TargetLoweringObjectFileImpl.cpp?rev=177256&r1=177255&r2=177256&view=diff
==============================================================================
--- llvm/trunk/lib/CodeGen/TargetLoweringObjectFileImpl.cpp (original)
+++ llvm/trunk/lib/CodeGen/TargetLoweringObjectFileImpl.cpp Mon Mar 18 03:10:10 2013
@@ -742,8 +742,11 @@ static const char *getCOFFSectionPrefixF
     return ".text$";
   if (Kind.isBSS ())
     return ".bss$";
-  if (Kind.isThreadLocal())
-    return ".tls$";
+  if (Kind.isThreadLocal()) {
+    // 'LLVM' is just an arbitary string to ensure that the section name gets
+    // sorted in between '.tls$AAA' and '.tls$ZZZ' by the linker.
+    return ".tls$LLVM";
+  }
   if (Kind.isWriteable())
     return ".data$";
   return ".rdata$";