From bdc38e5aa27bf57b4315b961a172e250bcb1bd69 Mon Sep 17 00:00:00 2001 From: Bill Wendling Date: Tue, 9 Mar 2010 18:31:07 +0000 Subject: The ARM EH experiment worked! Place the LSDA into the TEXT section for ARM platforms. This involves making the encoding indirect, pcrel, and sdata4 instead of an absolute pointer. The references to the type infos are then non-lazy pointers. Revision 98019 changed the encoding of non-lazy pointers to add the symbol to the non-lazy pointer definition if it's a local symbol (otherwise, it's external and set to '0' so that the loader can adjust it to the real value). This paved the way for this change to work on ARM. git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@98068 91177308-0d34-0410-b5e6-96231b3b80d8 --- lib/Target/ARM/ARMTargetObjectFile.cpp | 54 ++++++++++++++++++++++++++++++++++ 1 file changed, 54 insertions(+) create mode 100644 lib/Target/ARM/ARMTargetObjectFile.cpp (limited to 'lib/Target/ARM/ARMTargetObjectFile.cpp') diff --git a/lib/Target/ARM/ARMTargetObjectFile.cpp b/lib/Target/ARM/ARMTargetObjectFile.cpp new file mode 100644 index 0000000000..7463e309a8 --- /dev/null +++ b/lib/Target/ARM/ARMTargetObjectFile.cpp @@ -0,0 +1,54 @@ +//===-- llvm/Target/ARMTargetObjectFile.cpp - ARM Object Info Impl --------===// +// +// The LLVM Compiler Infrastructure +// +// This file is distributed under the University of Illinois Open Source +// License. See LICENSE.TXT for details. +// +//===----------------------------------------------------------------------===// + +#include "ARMTargetObjectFile.h" +#include "ARMSubtarget.h" +#include "llvm/MC/MCSectionELF.h" +#include "llvm/MC/MCSectionMachO.h" +#include "llvm/Support/Dwarf.h" +#include "llvm/Target/TargetMachine.h" +using namespace llvm; +using namespace dwarf; + +//===----------------------------------------------------------------------===// +// ELF Target +//===----------------------------------------------------------------------===// + +void ARMElfTargetObjectFile::Initialize(MCContext &Ctx, + const TargetMachine &TM) { + TargetLoweringObjectFileELF::Initialize(Ctx, TM); + + if (TM.getSubtarget().isAAPCS_ABI()) { + StaticCtorSection = + getELFSection(".init_array", MCSectionELF::SHT_INIT_ARRAY, + MCSectionELF::SHF_WRITE | MCSectionELF::SHF_ALLOC, + SectionKind::getDataRel()); + StaticDtorSection = + getELFSection(".fini_array", MCSectionELF::SHT_FINI_ARRAY, + MCSectionELF::SHF_WRITE | MCSectionELF::SHF_ALLOC, + SectionKind::getDataRel()); + } +} + +//===----------------------------------------------------------------------===// +// Mach-O Target +//===----------------------------------------------------------------------===// + +void ARMMachOTargetObjectFile::Initialize(MCContext &Ctx, + const TargetMachine &TM) { + TargetLoweringObjectFileMachO::Initialize(Ctx, TM); + + // Exception Handling. + LSDASection = getMachOSection("__TEXT", "__gcc_except_tab", 0, + SectionKind::getReadOnlyWithRel()); +} + +unsigned ARMMachOTargetObjectFile::getTTypeEncoding() const { + return DW_EH_PE_indirect | DW_EH_PE_pcrel | DW_EH_PE_sdata4; +} -- cgit v1.2.3