diff options
| author | Mark Brown <broonie@kernel.org> | 2021-12-14 18:27:13 +0300 |
|---|---|---|
| committer | Catalin Marinas <catalin.marinas@arm.com> | 2021-12-14 21:12:58 +0300 |
| commit | 481ee45ce9e078715b4ca50fcaea518e3aee1aa7 (patch) | |
| tree | 2e3e5d08719f3bd92b5baa38d9c91c690e48acf2 /arch/arm64/include/asm/linkage.h | |
| parent | 9be34be87cc8d1afe3c3bc2e645b4dee512d9eda (diff) | |
| download | linux-481ee45ce9e078715b4ca50fcaea518e3aee1aa7.tar.xz | |
arm64: Unconditionally override SYM_FUNC macros
Currently we only override the SYM_FUNC macros when we need to insert
BTI C into them, do this unconditionally to make it more likely that we'll
notice bugs in our override.
Suggested-by: Mark Rutland <mark.rutland@arm.com>
Acked-by: Ard Biesheuvel <ardb@kernel.org>
Signed-off-by: Mark Brown <broonie@kernel.org>
Acked-by: Mark Rutland <mark.rutland@arm.com>
Link: https://lore.kernel.org/r/20211214152714.2380849-3-broonie@kernel.org
Signed-off-by: Catalin Marinas <catalin.marinas@arm.com>
Diffstat (limited to 'arch/arm64/include/asm/linkage.h')
| -rw-r--r-- | arch/arm64/include/asm/linkage.h | 16 |
1 files changed, 11 insertions, 5 deletions
diff --git a/arch/arm64/include/asm/linkage.h b/arch/arm64/include/asm/linkage.h index c5d0c11d7709..1cfa8bb33edd 100644 --- a/arch/arm64/include/asm/linkage.h +++ b/arch/arm64/include/asm/linkage.h @@ -8,10 +8,18 @@ #define BTI_C bti c ; +#else + +#define BTI_C + +#endif + /* - * When using in-kernel BTI we need to ensure that PCS-conformant assembly - * functions have suitable annotations. Override SYM_FUNC_START to insert - * a BTI landing pad at the start of everything. + * When using in-kernel BTI we need to ensure that PCS-conformant + * assembly functions have suitable annotations. Override + * SYM_FUNC_START to insert a BTI landing pad at the start of + * everything, the override is done unconditionally so we're more + * likely to notice any drift from the overridden definitions. */ #define SYM_FUNC_START(name) \ SYM_START(name, SYM_L_GLOBAL, SYM_A_ALIGN) \ @@ -37,8 +45,6 @@ SYM_START(name, SYM_L_WEAK, SYM_A_NONE) \ BTI_C -#endif - /* * Annotate a function as position independent, i.e., safe to be called before * the kernel virtual mapping is activated. |