New +pauth (Pointer Authentication from Armv8.3-A) feature option for -march command line option.
Please note that majority of PAUTH instructions are implemented behind HINT
instruction. PAUTH stays a Armv8.3-A feature but now can be assigned to other
architectures or CPUs.
Patch includes:
- new +pauth command line option.
- docs update to +flagm command line option in docs.
Regression tested and no issues.
OK for master?
gcc/ChangeLog:
* config/aarch64/aarch64-option-extensions.def
(AARCH64_OPT_EXTENSION): New +pauth option in -march for AArch64.
* config/aarch64/aarch64.h (AARCH64_FL_PAUTH): New pauth extension
bitmask.
(AARCH64_ISA_PUATH): New ISA bitmask for PAUTH.
(AARCH64_FL_FOR_ARCH8_3): Add PAUTH to Armv8.3-A.
(TARGET_PAUTH): New target mask to isolate PAUTH instructions.
* config/aarch64/aarch64.md (do_return): Condition set to TARGET_PAUTH.
* doc/invoke.texi: Update docs (+flagm, +pauth).
rb13808.patch
Description: rb13808.patch
