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| author | Mark Brown <broonie@kernel.org> | 2021-12-14 15:27:14 +0000 |
|---|---|---|
| committer | Catalin Marinas <catalin.marinas@arm.com> | 2021-12-14 18:12:58 +0000 |
| commit | 742a15b1a23aa43bde2d9d681281ec1925be13fd (patch) | |
| tree | 6bf39f9f07ffeebf8cac95fd921ca9b813ac6e6e /arch/arm64/lib | |
| parent | 481ee45ce9e078715b4ca50fcaea518e3aee1aa7 (diff) | |
| download | lwn-742a15b1a23aa43bde2d9d681281ec1925be13fd.tar.gz lwn-742a15b1a23aa43bde2d9d681281ec1925be13fd.zip | |
arm64: Use BTI C directly and unconditionally
Now we have a macro for BTI C that looks like a regular instruction change
all the users of the current BTI_C macro to just emit a BTI C directly and
remove the macro.
This does mean that we now unconditionally BTI annotate all assembly
functions, meaning that they are worse in this respect than code generated
by the compiler. The overhead should be minimal for implementations with a
reasonable HINT implementation.
Signed-off-by: Mark Brown <broonie@kernel.org>
Reviewed-by: Ard Biesheuvel <ardb@kernel.org>
Acked-by: Mark Rutland <mark.rutland@arm.com>
Link: https://lore.kernel.org/r/20211214152714.2380849-4-broonie@kernel.org
Signed-off-by: Catalin Marinas <catalin.marinas@arm.com>
Diffstat (limited to 'arch/arm64/lib')
| -rw-r--r-- | arch/arm64/lib/kasan_sw_tags.S | 4 |
1 files changed, 1 insertions, 3 deletions
diff --git a/arch/arm64/lib/kasan_sw_tags.S b/arch/arm64/lib/kasan_sw_tags.S index 5b04464c045e..20784ce75def 100644 --- a/arch/arm64/lib/kasan_sw_tags.S +++ b/arch/arm64/lib/kasan_sw_tags.S @@ -38,9 +38,7 @@ * incremented by 256 prior to return). */ SYM_CODE_START(__hwasan_tag_mismatch) -#ifdef BTI_C - BTI_C -#endif + bti c add x29, sp, #232 stp x2, x3, [sp, #8 * 2] stp x4, x5, [sp, #8 * 4] |