diff options
| author | Szabolcs Nagy <szabolcs.nagy@arm.com> | 2024-11-14 16:15:03 +0000 |
|---|---|---|
| committer | Richard Sandiford <richard.sandiford@arm.com> | 2024-11-14 16:15:03 +0000 |
| commit | 56ded80b96b0f65327694912a6affbfc75e4e30d (patch) | |
| tree | bdfca8940e63084ce605290025890b3aac6e9f47 /gcc/configure.ac | |
| parent | 269b6477744f25ab0a89b364295b86a4bce392f9 (diff) | |
| download | gcc-56ded80b96b0f65327694912a6affbfc75e4e30d.zip gcc-56ded80b96b0f65327694912a6affbfc75e4e30d.tar.gz gcc-56ded80b96b0f65327694912a6affbfc75e4e30d.tar.bz2 | |
aarch64: Add -mbranch-protection=gcs option
This enables Guarded Control Stack (GCS) compatible code generation.
The "standard" branch-protection type enables it, and the default
depends on the compiler default.
gcc/ChangeLog:
* config/aarch64/aarch64-protos.h (aarch_gcs_enabled): Declare.
* config/aarch64/aarch64.cc (aarch_gcs_enabled): Define.
(aarch_handle_no_branch_protection): Handle gcs.
(aarch_handle_standard_branch_protection): Handle gcs.
(aarch_handle_gcs_protection): New.
* config/aarch64/aarch64.opt: Add aarch_enable_gcs.
* configure: Regenerate.
* configure.ac: Handle gcs in --enable-standard-branch-protection.
* doc/invoke.texi: Document -mbranch-protection=gcs.
Diffstat (limited to 'gcc/configure.ac')
| -rw-r--r-- | gcc/configure.ac | 6 |
1 files changed, 3 insertions, 3 deletions
diff --git a/gcc/configure.ac b/gcc/configure.ac index bdb22d5..bdd8cb0 100644 --- a/gcc/configure.ac +++ b/gcc/configure.ac @@ -4402,14 +4402,14 @@ case "$target" in AC_ARG_ENABLE(standard-branch-protection, [ AS_HELP_STRING([--enable-standard-branch-protection], - [enable Branch Target Identification Mechanism and Return Address Signing by default for AArch64]) + [enable Branch Target Identification Mechanism, Return Address Signing, and Guarded Control Stack by default for AArch64]) AS_HELP_STRING([--disable-standard-branch-protection], - [disable Branch Target Identification Mechanism and Return Address Signing by default for AArch64]) + [disable Branch Target Identification Mechanism, Return Address Signing, and Guarded Control Stack by default for AArch64]) ], [ case $enableval in yes) - tm_defines="${tm_defines} TARGET_ENABLE_BTI=1 TARGET_ENABLE_PAC_RET=1" + tm_defines="${tm_defines} TARGET_ENABLE_BTI=1 TARGET_ENABLE_PAC_RET=1 TARGET_ENABLE_GCS=1" ;; no) ;; |