diff options
| author | Eli Bendersky <eliben@chromium.org> | 2013-03-11 15:16:37 -0700 |
|---|---|---|
| committer | Eli Bendersky <eliben@chromium.org> | 2013-03-11 15:16:37 -0700 |
| commit | 23c00401dad33ca247d2818e71540079bed63c5b (patch) | |
| tree | df9f25d60f9538fbde84b78cf3c4e4a00eb6c3db /lib/Support/Unix/Memory.inc | |
| parent | 79da56afe68a0c5b2c2227681014dd13705d78cc (diff) | |
| parent | 279b9184c2ff4fea93b198a3519b8cb3a1d8d195 (diff) | |
Merge commit '279b9184c2ff4fea93b198a3519b8cb3a1d8d195'
Conflicts:
include/llvm/CodeGen/LexicalScopes.h
include/llvm/MC/MCAsmInfo.h
lib/Linker/LinkArchives.cpp
lib/Linker/LinkItems.cpp
lib/MC/MCAsmInfo.cpp
lib/MC/MCDwarf.cpp
lib/Target/ARM/ARMInstrInfo.td
lib/Target/ARM/ARMSubtarget.cpp
lib/Target/ARM/MCTargetDesc/ARMMCTargetDesc.cpp
lib/Target/Mips/MCTargetDesc/MipsELFObjectWriter.cpp
lib/Target/Mips/MCTargetDesc/MipsMCTargetDesc.cpp
lib/Target/Mips/MipsAsmPrinter.cpp
lib/Target/Mips/MipsDelaySlotFiller.cpp
lib/Target/Mips/MipsISelDAGToDAG.cpp
lib/Target/Mips/MipsSubtarget.cpp
lib/Target/Mips/MipsSubtarget.h
lib/Target/Mips/MipsTargetObjectFile.cpp
lib/Target/X86/MCTargetDesc/X86MCAsmInfo.cpp
lib/Target/X86/X86FastISel.cpp
lib/Target/X86/X86ISelLowering.cpp
lib/Target/X86/X86TargetMachine.cpp
lib/Transforms/CMakeLists.txt
lib/Transforms/LLVMBuild.txt
lib/Transforms/Makefile
test/MC/ARM/arm_instructions.s
test/MC/X86/AlignedBundling/pad-align-to-bundle-end.s
Diffstat (limited to 'lib/Support/Unix/Memory.inc')
| -rw-r--r-- | lib/Support/Unix/Memory.inc | 11 |
1 files changed, 11 insertions, 0 deletions
diff --git a/lib/Support/Unix/Memory.inc b/lib/Support/Unix/Memory.inc index 8a766f041e..e6fba6801c 100644 --- a/lib/Support/Unix/Memory.inc +++ b/lib/Support/Unix/Memory.inc @@ -51,7 +51,18 @@ int getPosixProtectionFlags(unsigned Flags) { llvm::sys::Memory::MF_EXEC: return PROT_READ | PROT_WRITE | PROT_EXEC; case llvm::sys::Memory::MF_EXEC: +#if defined(__FreeBSD__) + // On PowerPC, having an executable page that has no read permission + // can have unintended consequences. The function InvalidateInstruction- + // Cache uses instructions dcbf and icbi, both of which are treated by + // the processor as loads. If the page has no read permissions, + // executing these instructions will result in a segmentation fault. + // Somehow, this problem is not present on Linux, but it does happen + // on FreeBSD. + return PROT_READ | PROT_EXEC; +#else return PROT_EXEC; +#endif default: llvm_unreachable("Illegal memory protection flag specified!"); } |