diff options
Diffstat (limited to 'lib/Target/ARM/ARMTargetObjectFile.cpp')
| -rw-r--r-- | lib/Target/ARM/ARMTargetObjectFile.cpp | 14 |
1 files changed, 13 insertions, 1 deletions
diff --git a/lib/Target/ARM/ARMTargetObjectFile.cpp b/lib/Target/ARM/ARMTargetObjectFile.cpp index d0620761ea9..9c13359cba7 100644 --- a/lib/Target/ARM/ARMTargetObjectFile.cpp +++ b/lib/Target/ARM/ARMTargetObjectFile.cpp @@ -32,7 +32,8 @@ void ARMElfTargetObjectFile::Initialize(MCContext &Ctx, const TargetMachine &TM) { const ARMBaseTargetMachine &ARM_TM = static_cast<const ARMBaseTargetMachine &>(TM); bool isAAPCS_ABI = ARM_TM.TargetABI == ARMBaseTargetMachine::ARMABI::ARM_ABI_AAPCS; - // genExecuteOnly = ARM_TM.getSubtargetImpl()->genExecuteOnly(); + bool genExecuteOnly = + ARM_TM.getMCSubtargetInfo()->hasFeature(ARM::FeatureExecuteOnly); TargetLoweringObjectFileELF::Initialize(Ctx, TM); InitializeELF(isAAPCS_ABI); @@ -40,6 +41,17 @@ void ARMElfTargetObjectFile::Initialize(MCContext &Ctx, if (isAAPCS_ABI) { LSDASection = nullptr; } + + // Make code section unreadable when in execute-only mode + if (genExecuteOnly) { + unsigned Type = ELF::SHT_PROGBITS; + unsigned Flags = + ELF::SHF_EXECINSTR | ELF::SHF_ALLOC | ELF::SHF_ARM_PURECODE; + // Since we cannot modify flags for an existing section, we create a new + // section with the right flags, and use 0 as the unique ID for + // execute-only text + TextSection = Ctx.getELFSection(".text", Type, Flags, 0, "", 0U); + } } const MCExpr *ARMElfTargetObjectFile::getTTypeGlobalReference( |