diff options
| author | Yury Khrustalev <yury.khrustalev@arm.com> | 2025-01-28 16:13:51 +0000 |
|---|---|---|
| committer | Yury Khrustalev <yury.khrustalev@arm.com> | 2025-02-21 16:06:44 +0000 |
| commit | c05086d9043e996ba0490f029e96ca8ea549de66 (patch) | |
| tree | 6308295697d540ca2229cc39ccf09007e30104f7 /configure.ac | |
| parent | 6d24313e4a4098f7c469e119784bfbbfdb1ec749 (diff) | |
aarch64: Add configure checks for GCS support
- Add check that linker supports -z gcs=...
- Add checks that main and test compiler support
-mbranch-protection=gcs
Reviewed-by: Adhemerval Zanella <adhemerval.zanella@linaro.org>
Diffstat (limited to 'configure.ac')
| -rw-r--r-- | configure.ac | 17 |
1 files changed, 17 insertions, 0 deletions
diff --git a/configure.ac b/configure.ac index 050bfa65e3..d4ef0c4243 100644 --- a/configure.ac +++ b/configure.ac @@ -1992,6 +1992,23 @@ LIBC_LINKER_FEATURE([-Ttext-segment=$libc_cv_pde_load_address], [libc_cv_load_address_ldflag=]) LIBC_CONFIG_VAR([load-address-ldflag], [$libc_cv_load_address_ldflag]) +# Check if compilers support GCS in branch protection: +LIBC_TRY_CC_AND_TEST_CC_OPTION([if compiler supports -mbranch-protection=gcs], + [-Werror -mbranch-protection=gcs], + libc_cv_cc_gcs, + [libc_cv_cc_gcs=yes], + [libc_cv_cc_gcs=no], + libc_cv_test_cc_gcs, + [libc_cv_test_cc_gcs=yes], + [libc_cv_test_cc_gcs=no]) +LIBC_CONFIG_VAR([have-cc-gcs], [$libc_cv_cc_gcs]) +LIBC_CONFIG_VAR([have-test-cc-gcs], [$libc_cv_test_cc_gcs]) + +# Check if linker supports GCS marking +LIBC_LINKER_FEATURE([-z gcs=always], [-Wl,-z,gcs=always], + [libc_cv_ld_gcs=yes], [libc_cv_ld_gcs=no]) +LIBC_CONFIG_VAR([have-ld-gcs], [$libc_cv_ld_gcs]) + AC_MSG_CHECKING(if we can build programs as PIE) AC_COMPILE_IFELSE([AC_LANG_SOURCE([[#ifdef PIE_UNSUPPORTED # error PIE is not supported |