[Bug target/81708] The x86 stack canary location should be customizable

["uros at gcc dot gnu.org" <gcc-bugzilla at gcc dot gnu dot org>]

https://gcc.gnu.org/bugzilla/show_bug.cgi?id=81708

--- Comment #5 from uros at gcc dot gnu.org ---
Author: uros
Date: Tue Aug  8 16:48:46 2017
New Revision: 250965

URL: https://gcc.gnu.org/viewcvs?rev=250965&root=gcc&view=rev
Log:
        PR target/81708
        * config/i386/i386.opt (mstack-protector-guard-reg=): New option
        (mstack-protector-guard-offset=): Ditto.
        * config/i386/i386.c (ix86_option_override): Handle
        -mstack-protector-guard-reg= and -mstack-protector-guard-offset=
        options.
        (ix86_stack_protect_guard): Use ix86_stack_protect_guard_reg and
        ix86_stack_protect_guard_offset variables.
        (TARGET_STACK_PROTECT_GUARD): Always define.
        * doc/invoke.texi (x86 Options): Document -mstack-protector-guard-reg=
        and -mstack-protector-guard-offset= options.

testsuite/ChangeLog:

        PR target/81708
        * gcc.target/i386/stack-prot-guard.c: New test.


Added:
    trunk/gcc/testsuite/gcc.target/i386/stack-prot-guard.c
Modified:
    trunk/gcc/ChangeLog
    trunk/gcc/config/i386/i386.c
    trunk/gcc/config/i386/i386.opt
    trunk/gcc/doc/invoke.texi
    trunk/gcc/testsuite/ChangeLog