[Bug target/102035] arm/m-profile/cmse add mitigation for CVE-2021-35465

[cvs-commit at gcc dot gnu.org via Gcc-bugs]

https://gcc.gnu.org/bugzilla/show_bug.cgi?id=102035

--- Comment #2 from CVS Commits <cvs-commit at gcc dot gnu.org> ---
The master branch has been updated by Richard Earnshaw <rearn...@gcc.gnu.org>:

https://gcc.gnu.org/g:3929bca9ca95de9d35e82ae8828b188029e3eb70

commit r12-3112-g3929bca9ca95de9d35e82ae8828b188029e3eb70
Author: Richard Earnshaw <rearn...@arm.com>
Date:   Fri Jun 11 16:02:05 2021 +0100

    arm: Add command-line option for enabling CVE-2021-35465 mitigation
[PR102035]

    Add a new option, -mfix-cmse-cve-2021-35465 and document it.  Enable it
    automatically for cortex-m33, cortex-m35p and cortex-m55.

    gcc:
            PR target/102035
            * config/arm/arm.opt (mfix-cmse-cve-2021-35465): New option.
            * doc/invoke.texi (Arm Options): Document it.
            * config/arm/arm-cpus.in (quirk_vlldm): New feature bit.
            (ALL_QUIRKS): Add quirk_vlldm.
            (cortex-m33): Add quirk_vlldm.
            (cortex-m35p, cortex-m55): Likewise.
            * config/arm/arm.c (arm_option_override): Enable fix_vlldm if
            targetting an affected CPU and not explicitly controlled on
            the command line.