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Diffstat (limited to 'arch/arm64/include/asm/linkage.h')
| -rw-r--r-- | arch/arm64/include/asm/linkage.h | 46 |
1 files changed, 46 insertions, 0 deletions
diff --git a/arch/arm64/include/asm/linkage.h b/arch/arm64/include/asm/linkage.h new file mode 100644 index 0000000000..d3acd9c875 --- /dev/null +++ b/arch/arm64/include/asm/linkage.h @@ -0,0 +1,46 @@ +#ifndef __ASM_LINKAGE_H +#define __ASM_LINKAGE_H + +#ifdef __ASSEMBLY__ +#include <asm/assembler.h> +#endif + +#define __ALIGN .balign CONFIG_FUNCTION_ALIGNMENT +#define __ALIGN_STR ".balign " #CONFIG_FUNCTION_ALIGNMENT + +/* + * 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) \ + bti c ; + +#define SYM_FUNC_START_NOALIGN(name) \ + SYM_START(name, SYM_L_GLOBAL, SYM_A_NONE) \ + bti c ; + +#define SYM_FUNC_START_LOCAL(name) \ + SYM_START(name, SYM_L_LOCAL, SYM_A_ALIGN) \ + bti c ; + +#define SYM_FUNC_START_LOCAL_NOALIGN(name) \ + SYM_START(name, SYM_L_LOCAL, SYM_A_NONE) \ + bti c ; + +#define SYM_FUNC_START_WEAK(name) \ + SYM_START(name, SYM_L_WEAK, SYM_A_ALIGN) \ + bti c ; + +#define SYM_FUNC_START_WEAK_NOALIGN(name) \ + SYM_START(name, SYM_L_WEAK, SYM_A_NONE) \ + bti c ; + +#define SYM_TYPED_FUNC_START(name) \ + SYM_TYPED_START(name, SYM_L_GLOBAL, SYM_A_ALIGN) \ + bti c ; + +#endif |