From ec9de4677ac61f2164d7c80cae5da0008189efa3 Mon Sep 17 00:00:00 2001
From: Philip Reames <listmail@philipreames.com>
Date: Fri, 1 Aug 2014 18:47:09 +0000
Subject: [PATCH] Add support for StackMap section for ELF/Linux systems

This patch adds code to emits the StackMap section on ELF systems. This section is required to support llvm.experimental.stackmap and llvm.experimental.patchpoint intrinsics.

Reviewers: ributzka, echristo

Differential Revision: http://reviews.llvm.org/D4574


git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@214538 91177308-0d34-0410-b5e6-96231b3b80d8
---
 lib/MC/MCObjectFileInfo.cpp      | 6 ++++++
 lib/Target/X86/X86AsmPrinter.cpp | 2 ++
 2 files changed, 8 insertions(+)

diff --git a/lib/MC/MCObjectFileInfo.cpp b/lib/MC/MCObjectFileInfo.cpp
index df5787c..da707d8 100644
--- a/lib/MC/MCObjectFileInfo.cpp
+++ b/lib/MC/MCObjectFileInfo.cpp
@@ -583,6 +583,12 @@ void MCObjectFileInfo::InitELFMCObjectFileInfo(Triple T) {
   DwarfAddrSection =
     Ctx->getELFSection(".debug_addr", ELF::SHT_PROGBITS, 0,
                        SectionKind::getMetadata());
+
+  StackMapSection =
+    Ctx->getELFSection(".llvm_stackmaps", ELF::SHT_PROGBITS,
+                       ELF::SHF_ALLOC,
+                       SectionKind::getMetadata());
+
 }
 
 
diff --git a/lib/Target/X86/X86AsmPrinter.cpp b/lib/Target/X86/X86AsmPrinter.cpp
index 3c22e88..fc0d408 100644
--- a/lib/Target/X86/X86AsmPrinter.cpp
+++ b/lib/Target/X86/X86AsmPrinter.cpp
@@ -736,6 +736,8 @@ void X86AsmPrinter::EmitEndOfAsmFile(Module &M) {
       }
       Stubs.clear();
     }
+
+    SM.serializeToStackMapSection();
   }
 }
 
-- 
1.9.3