From 3e96531186ba574b0c25a4be62d24b8b7d752c9f Mon Sep 17 00:00:00 2001 From: Jim Grosbach Date: Fri, 18 May 2012 19:12:01 +0000 Subject: Refactor data-in-code annotations. Use a dedicated MachO load command to annotate data-in-code regions. This is the same format the linker produces for final executable images, allowing consistency of representation and use of introspection tools for both object and executable files. Data-in-code regions are annotated via ".data_region"/".end_data_region" directive pairs, with an optional region type. data_region_directive := ".data_region" { region_type } region_type := "jt8" | "jt16" | "jt32" | "jta32" end_data_region_directive := ".end_data_region" The previous handling of ARM-style "$d.*" labels was broken and has been removed. Specifically, it didn't handle ARM vs. Thumb mode when marking the end of the section. rdar://11459456 git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@157062 91177308-0d34-0410-b5e6-96231b3b80d8 --- lib/MC/MCAsmStreamer.cpp | 16 ++++++++++++++++ 1 file changed, 16 insertions(+) (limited to 'lib/MC/MCAsmStreamer.cpp') diff --git a/lib/MC/MCAsmStreamer.cpp b/lib/MC/MCAsmStreamer.cpp index 3ce84c2cd9..9497b6be49 100644 --- a/lib/MC/MCAsmStreamer.cpp +++ b/lib/MC/MCAsmStreamer.cpp @@ -138,6 +138,7 @@ public: virtual void EmitEHSymAttributes(const MCSymbol *Symbol, MCSymbol *EHSymbol); virtual void EmitAssemblerFlag(MCAssemblerFlag Flag); + virtual void EmitDataRegion(MCDataRegionType Kind); virtual void EmitThumbFunc(MCSymbol *Func); virtual void EmitAssignment(MCSymbol *Symbol, const MCExpr *Value); @@ -352,6 +353,21 @@ void MCAsmStreamer::EmitAssemblerFlag(MCAssemblerFlag Flag) { EmitEOL(); } +void MCAsmStreamer::EmitDataRegion(MCDataRegionType Kind) { + MCContext &Ctx = getContext(); + const MCAsmInfo &MAI = Ctx.getAsmInfo(); + if (!MAI.doesSupportDataRegionDirectives()) + return; + switch (Kind) { + case MCDR_DataRegion: OS << "\t.data_region"; break; + case MCDR_DataRegionJT8: OS << "\t.data_region jt8"; break; + case MCDR_DataRegionJT16: OS << "\t.data_region jt16"; break; + case MCDR_DataRegionJT32: OS << "\t.data_region jt32"; break; + case MCDR_DataRegionEnd: OS << "\t.end_data_region"; break; + } + EmitEOL(); +} + void MCAsmStreamer::EmitThumbFunc(MCSymbol *Func) { // This needs to emit to a temporary string to get properly quoted // MCSymbols when they have spaces in them. -- cgit v1.2.3