ELF symbol table field st_other support,

excluding visibility bits.

Generic STO handling at the Target level.

The st_other field of the ELF symbol table is one
byte in size. The first 2 bytes are used for generic
visibility and are currently handled by llvm.

The other six bits are processor specific and need 
to be set at the target level.

A couple of notes:

The new static methods for accessing and setting the "other"
flags in include/llvm/MC/MCELF.h match the style guide
and not the other methods in the file. I don't like the
inconsistency, but feel I should follow the prescribed 
lowerUpper() convention.

STO_ value definitions are not specified in gnu land as 
consistently as the STT_ and STB_ fields. Probably because
the latter were defined in a standards doc and the former
defined partially in code. I have stuck with the full byte
definition of the flags.

Contributer: Zoran Jovanovic




git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@175561 91177308-0d34-0410-b5e6-96231b3b80d8

3 files changed, 8 insertions, 0 deletions

diff --git a/include/llvm/MC/MCELF.h b/include/llvm/MC/MCELF.h
index e08f1e6..7e59911 100644
--- a/include/llvm/MC/MCELF.h
+++ b/include/llvm/MC/MCELF.h
@@ -28,6 +28,8 @@ class MCELF {
   static unsigned GetType(const MCSymbolData &SD);
   static void SetVisibility(MCSymbolData &SD, unsigned Visibility);
   static unsigned GetVisibility(MCSymbolData &SD);
+  static void setOther(MCSymbolData &SD, unsigned Other);
+  static unsigned getOther(MCSymbolData &SD);
 };
 
 }
diff --git a/include/llvm/MC/MCELFStreamer.h b/include/llvm/MC/MCELFStreamer.h
index f78de15..6fb2d22 100644
--- a/include/llvm/MC/MCELFStreamer.h
+++ b/include/llvm/MC/MCELFStreamer.h
@@ -65,6 +65,8 @@ public:
   virtual void EmitCOFFSymbolType(int Type);
   virtual void EndCOFFSymbolDef();
 
+  virtual MCSymbolData &getOrCreateSymbolData(MCSymbol *Symbol);
+
   virtual void EmitELFSize(MCSymbol *Symbol, const MCExpr *Value);
 
   virtual void EmitLocalCommonSymbol(MCSymbol *Symbol, uint64_t Size,
diff --git a/include/llvm/MC/MCStreamer.h b/include/llvm/MC/MCStreamer.h
index 9bc4a8b..d247066 100644
--- a/include/llvm/MC/MCStreamer.h
+++ b/include/llvm/MC/MCStreamer.h
@@ -16,6 +16,7 @@
 
 #include "llvm/ADT/ArrayRef.h"
 #include "llvm/ADT/SmallVector.h"
+#include "llvm/MC/MCAssembler.h"
 #include "llvm/MC/MCDirectives.h"
 #include "llvm/MC/MCDwarf.h"
 #include "llvm/MC/MCWin64EH.h"
@@ -286,6 +287,9 @@ namespace llvm {
     /// a Thumb mode function (ARM target only).
     virtual void EmitThumbFunc(MCSymbol *Func) = 0;
 
+    /// getOrCreateSymbolData - Get symbol data for given symbol.
+    virtual MCSymbolData &getOrCreateSymbolData(MCSymbol *Symbol);
+
     /// EmitAssignment - Emit an assignment of @p Value to @p Symbol.
     ///
     /// This corresponds to an assembler statement such as: