[mips] Removed the SHF_ALLOC flag from the .pdr section.

ScottEgerton · ScottEgerton · commit baec95a88cd5 · 2016-02-15T09:34:15.000Z
Summary: This section is used for debug information and has no need to be in memory at runtime. With this patch, LLVM now emits the same flags as the GNU assembler. This patch also fixes an error when compiling the Linux kernel, The error is that there are relocations within the .pdr section in a VDSO. Reviewers: vkalintiris, dsanders Subscribers: llvm-commits, dsanders Differential Revision: http://reviews.llvm.org/D17199 llvm-svn: 260879
diff --git a/llvm/lib/Target/Mips/MCTargetDesc/MipsTargetStreamer.cpp b/llvm/lib/Target/Mips/MCTargetDesc/MipsTargetStreamer.cpp
@@ -611,7 +611,7 @@ void MipsTargetELFStreamer::emitDirectiveEnd(StringRef Name) {
   MCStreamer &OS = getStreamer();
 
   MCSectionELF *Sec = Context.getELFSection(".pdr", ELF::SHT_PROGBITS,
-                                            ELF::SHF_ALLOC | ELF::SHT_REL);
+                                            ELF::SHT_REL);
 
   MCSymbol *Sym = Context.getOrCreateSymbol(Name);
   const MCSymbolRefExpr *ExprRef =
diff --git a/llvm/test/MC/Mips/mips-pdr.s b/llvm/test/MC/Mips/mips-pdr.s
@@ -18,8 +18,8 @@
 # OBJOUT: Section {
 # OBJOUT:     Name: .pdr
 # OBJOUT:     Type: SHT_PROGBITS (0x1)
-# OBJOUT:     Flags [ (0xB)
-# OBJOUT:       SHF_ALLOC (0x2)
+# OBJOUT:     Flags [ (0x9)
+# OBJOUT-NOT:   SHF_ALLOC (0x2)
 # OBJOUT:       SHF_WRITE (0x1)
 # OBJOUT:     ]
 # OBJOUT:     Size: 64
