diff options
Diffstat (limited to 'arch/arm64/include/asm/scs.h')
| -rw-r--r-- | arch/arm64/include/asm/scs.h | 41 |
1 files changed, 36 insertions, 5 deletions
diff --git a/arch/arm64/include/asm/scs.h b/arch/arm64/include/asm/scs.h index 8297bccf0784..0fbc2e7867d3 100644 --- a/arch/arm64/include/asm/scs.h +++ b/arch/arm64/include/asm/scs.h @@ -2,28 +2,59 @@ #ifndef _ASM_SCS_H #define _ASM_SCS_H -#ifdef __ASSEMBLY__ +#ifdef __ASSEMBLER__ #include <asm/asm-offsets.h> +#include <asm/sysreg.h> #ifdef CONFIG_SHADOW_CALL_STACK scs_sp .req x18 - .macro scs_load tsk - ldr scs_sp, [\tsk, #TSK_TI_SCS_SP] + .macro scs_load_current + get_current_task scs_sp + ldr scs_sp, [scs_sp, #TSK_TI_SCS_SP] .endm .macro scs_save tsk str scs_sp, [\tsk, #TSK_TI_SCS_SP] .endm #else - .macro scs_load tsk + .macro scs_load_current .endm .macro scs_save tsk .endm #endif /* CONFIG_SHADOW_CALL_STACK */ -#endif /* __ASSEMBLY __ */ + +#else + +#include <linux/scs.h> +#include <asm/cpufeature.h> + +#ifdef CONFIG_UNWIND_PATCH_PAC_INTO_SCS +static inline void dynamic_scs_init(void) +{ + extern bool __pi_dynamic_scs_is_enabled; + + if (__pi_dynamic_scs_is_enabled) { + pr_info("Enabling dynamic shadow call stack\n"); + static_branch_enable(&dynamic_scs_enabled); + } +} +#else +static inline void dynamic_scs_init(void) {} +#endif + +enum { + EDYNSCS_INVALID_CIE_HEADER = 1, + EDYNSCS_INVALID_CIE_SDATA_SIZE = 2, + EDYNSCS_INVALID_FDE_AUGM_DATA_SIZE = 3, + EDYNSCS_INVALID_CFA_OPCODE = 4, +}; + +int __pi_scs_patch(const u8 eh_frame[], int size, bool skip_dry_run); + +#endif /* __ASSEMBLER__ */ #endif /* _ASM_SCS_H */ |