sets bit 0 of the function address of thumb function in .symtab

("T is 1 if the target symbol S has type STT_FUNC and the
symbol addresses a Thumb instruction ;it is 0 otherwise."
from "ELF for the ARM Architecture" 4.7.1.2)

Patch by Koan-Sin Tan!

llvm-svn: 131406

1 files changed, 7 insertions, 2 deletions

diff --git a/llvm/lib/MC/ELFObjectWriter.cpp b/llvm/lib/MC/ELFObjectWriter.cpp
index 5b54e55d899..0aaf7708479 100644
--- a/llvm/lib/MC/ELFObjectWriter.cpp
+++ b/llvm/lib/MC/ELFObjectWriter.cpp
@@ -193,8 +193,13 @@ uint64_t ELFObjectWriter::SymbolValue(MCSymbolData &Data,
   if (!Symbol.isInSection())
     return 0;
 
-  if (Data.getFragment())
-    return Layout.getSymbolOffset(&Data);
+
+  if (Data.getFragment()) {
+    if (Data.getFlags() & ELF_Other_ThumbFunc)
+      return Layout.getSymbolOffset(&Data)+1;
+    else
+      return Layout.getSymbolOffset(&Data);
+  }
 
   return 0;
 }