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| author | Michal Kubecek <mkubecek@suse.cz> | 2021-05-15 12:11:13 +0200 |
|---|---|---|
| committer | Masahiro Yamada <masahiroy@kernel.org> | 2021-05-17 12:10:03 +0900 |
| commit | c93db682cfb213501881072a9200a48ce1dc3c3f (patch) | |
| tree | 4b757f43f6dfed0ad7c8e7850464db639dc03e6e /scripts/dummy-tools | |
| parent | 98a499a11ecdd8cb91d03dd5c034aaf7422f2deb (diff) | |
| download | lwn-c93db682cfb213501881072a9200a48ce1dc3c3f.tar.gz lwn-c93db682cfb213501881072a9200a48ce1dc3c3f.zip | |
kbuild: dummy-tools: adjust to stricter stackprotector check
Commit 3fb0fdb3bbe7 ("x86/stackprotector/32: Make the canary into a regular
percpu variable") modified the stackprotector check on 32-bit x86 to check
if gcc supports using %fs as canary. Adjust dummy-tools gcc script to pass
this new test by returning "%fs" rather than "%gs" if it detects
-mstack-protector-guard-reg=fs on command line.
Fixes: 3fb0fdb3bbe7 ("x86/stackprotector/32: Make the canary into a regular percpu variable")
Signed-off-by: Michal Kubecek <mkubecek@suse.cz>
Signed-off-by: Masahiro Yamada <masahiroy@kernel.org>
Diffstat (limited to 'scripts/dummy-tools')
| -rwxr-xr-x | scripts/dummy-tools/gcc | 6 |
1 files changed, 5 insertions, 1 deletions
diff --git a/scripts/dummy-tools/gcc b/scripts/dummy-tools/gcc index f6d543725f1e..b2483149bbe5 100755 --- a/scripts/dummy-tools/gcc +++ b/scripts/dummy-tools/gcc @@ -76,7 +76,11 @@ fi if arg_contain -S "$@"; then # For scripts/gcc-x86-*-has-stack-protector.sh if arg_contain -fstack-protector "$@"; then - echo "%gs" + if arg_contain -mstack-protector-guard-reg=fs "$@"; then + echo "%fs" + else + echo "%gs" + fi exit 0 fi |