r268068 - in /trunk/gcc: ChangeLog config/aarch...

[ramana@gcc.gnu.org]

Author: ramana
Date: Fri Jan 18 10:32:40 2019
New Revision: 268068

URL: https://gcc.gnu.org/viewcvs?rev=268068&root=gcc&view=rev
Log:
[AArch64] Add support for system register based stack protector canary access

2019-01-18  Ramana Radhakrishnan  <ramana.radhakrishnan@arm.com>

        * config/aarch64/aarch64-opts.h (enum stack_protector_guard): New
        * config/aarch64/aarch64.c (aarch64_override_options_internal): Handle
        and put in error checks for stack protector guard options.
        (aarch64_stack_protect_guard): New.
        (TARGET_STACK_PROTECT_GUARD): Define.
        * config/aarch64/aarch64.md (UNSPEC_SSP_SYSREG): New.
        (reg_stack_protect_address<mode>): New.
        (stack_protect_set): Adjust for SSP_GLOBAL.
        (stack_protect_test): Likewise.
        * config/aarch64/aarch64.opt (-mstack-protector-guard-reg): New.
        (-mstack-protector-guard): Likewise.
        (-mstack-protector-guard-offset): Likewise.



Modified:
    trunk/gcc/ChangeLog
    trunk/gcc/config/aarch64/aarch64-opts.h
    trunk/gcc/config/aarch64/aarch64.c
    trunk/gcc/config/aarch64/aarch64.md
    trunk/gcc/config/aarch64/aarch64.opt
    trunk/gcc/doc/invoke.texi