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| author | Evgeniy Stepanov <eugeni.stepanov@gmail.com> | 2015-10-26 18:28:25 +0000 |
|---|---|---|
| committer | Evgeniy Stepanov <eugeni.stepanov@gmail.com> | 2015-10-26 18:28:25 +0000 |
| commit | d1aad265891cf58b4c16c532d3578c4bbbb297ff (patch) | |
| tree | 2d41a44c771e19df9068fc81db056e1344558137 /llvm/lib/Bitcode/Writer/BitcodeWriter.cpp | |
| parent | 693499cefc75f095a6afae64fcf25137fb309f91 (diff) | |
| download | bcm5719-llvm-d1aad265891cf58b4c16c532d3578c4bbbb297ff.tar.gz bcm5719-llvm-d1aad265891cf58b4c16c532d3578c4bbbb297ff.zip | |
[safestack] Fast access to the unsafe stack pointer on AArch64/Android.
Android libc provides a fixed TLS slot for the unsafe stack pointer,
and this change implements direct access to that slot on AArch64 via
__builtin_thread_pointer() + offset.
This change also moves more code into TargetLowering and its
target-specific subclasses to get rid of target-specific codegen
in SafeStackPass.
This change does not touch the ARM backend because ARM lowers
builting_thread_pointer as aeabi_read_tp, which is not available
on Android.
The previous iteration of this change was reverted in r250461. This
version leaves the generic, compiler-rt based implementation in
SafeStack.cpp instead of moving it to TargetLoweringBase in order to
allow testing without a TargetMachine.
llvm-svn: 251324
Diffstat (limited to 'llvm/lib/Bitcode/Writer/BitcodeWriter.cpp')
0 files changed, 0 insertions, 0 deletions
