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Subject: [Bug target/102035] arm/m-profile/cmse add mitigation for
 CVE-2021-35465
Date: Tue, 24 Aug 2021 10:58:33 +0000
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https://gcc.gnu.org/bugzilla/show_bug.cgi?id=3D102035

--- Comment #4 from CVS Commits <cvs-commit at gcc dot gnu.org> ---
The master branch has been updated by Richard Earnshaw <rearnsha@gcc.gnu.or=
g>:

https://gcc.gnu.org/g:30461cf8dba3d3adb15a125e4da48800eb2b9b8f

commit r12-3114-g30461cf8dba3d3adb15a125e4da48800eb2b9b8f
Author: Richard Earnshaw <rearnsha@arm.com>
Date:   Fri Jun 18 17:18:37 2021 +0100

    arm: fix vlldm erratum for Armv8.1-m [PR102035]

    For Armv8.1-m we generate code that emits VLLDM directly and do not
    rely on support code in the library, so emit the mitigation directly
    as well, when required.  In this case, we can use the compiler options
    to determine when to apply the fix and when it is safe to omit it.

    gcc:
            PR target/102035
            * config/arm/arm.md (attribute arch): Add fix_vlldm.
            (arch_enabled): Use it.
            * config/arm/vfp.md (lazy_store_multiple_insn): Add alternative=
 to
            use when erratum mitigation is needed.=