diff options
Diffstat (limited to 'arch/riscv/include')
| -rw-r--r-- | arch/riscv/include/asm/asm-prototypes.h | 3 | ||||
| -rw-r--r-- | arch/riscv/include/asm/thread_info.h | 15 |
2 files changed, 18 insertions, 0 deletions
diff --git a/arch/riscv/include/asm/asm-prototypes.h b/arch/riscv/include/asm/asm-prototypes.h index 2a652b0c987d..ef386fcf3939 100644 --- a/arch/riscv/include/asm/asm-prototypes.h +++ b/arch/riscv/include/asm/asm-prototypes.h @@ -25,4 +25,7 @@ DECLARE_DO_ERROR_INFO(do_trap_ecall_s); DECLARE_DO_ERROR_INFO(do_trap_ecall_m); DECLARE_DO_ERROR_INFO(do_trap_break); +asmlinkage unsigned long get_overflow_stack(void); +asmlinkage void handle_bad_stack(struct pt_regs *regs); + #endif /* _ASM_RISCV_PROTOTYPES_H */ diff --git a/arch/riscv/include/asm/thread_info.h b/arch/riscv/include/asm/thread_info.h index 0e549a3089b3..60da0dcacf14 100644 --- a/arch/riscv/include/asm/thread_info.h +++ b/arch/riscv/include/asm/thread_info.h @@ -19,6 +19,21 @@ #endif #define THREAD_SIZE (PAGE_SIZE << THREAD_SIZE_ORDER) +/* + * By aligning VMAP'd stacks to 2 * THREAD_SIZE, we can detect overflow by + * checking sp & (1 << THREAD_SHIFT), which we can do cheaply in the entry + * assembly. + */ +#ifdef CONFIG_VMAP_STACK +#define THREAD_ALIGN (2 * THREAD_SIZE) +#else +#define THREAD_ALIGN THREAD_SIZE +#endif + +#define THREAD_SHIFT (PAGE_SHIFT + THREAD_SIZE_ORDER) +#define OVERFLOW_STACK_SIZE SZ_4K +#define SHADOW_OVERFLOW_STACK_SIZE (1024) + #ifndef __ASSEMBLY__ #include <asm/processor.h> |