diff options
Diffstat (limited to 'arch/riscv/include/asm/asm-extable.h')
| -rw-r--r-- | arch/riscv/include/asm/asm-extable.h | 27 |
1 files changed, 24 insertions, 3 deletions
diff --git a/arch/riscv/include/asm/asm-extable.h b/arch/riscv/include/asm/asm-extable.h index 14be0673f5b5..37d425d7a762 100644 --- a/arch/riscv/include/asm/asm-extable.h +++ b/arch/riscv/include/asm/asm-extable.h @@ -6,8 +6,11 @@ #define EX_TYPE_FIXUP 1 #define EX_TYPE_BPF 2 #define EX_TYPE_UACCESS_ERR_ZERO 3 +#define EX_TYPE_LOAD_UNALIGNED_ZEROPAD 4 -#ifdef __ASSEMBLY__ +#ifdef CONFIG_MMU + +#ifdef __ASSEMBLER__ #define __ASM_EXTABLE_RAW(insn, fixup, type, data) \ .pushsection __ex_table, "a"; \ @@ -22,7 +25,7 @@ __ASM_EXTABLE_RAW(\insn, \fixup, EX_TYPE_FIXUP, 0) .endm -#else /* __ASSEMBLY__ */ +#else /* __ASSEMBLER__ */ #include <linux/bits.h> #include <linux/stringify.h> @@ -45,6 +48,11 @@ #define EX_DATA_REG_ZERO_SHIFT 5 #define EX_DATA_REG_ZERO GENMASK(9, 5) +#define EX_DATA_REG_DATA_SHIFT 0 +#define EX_DATA_REG_DATA GENMASK(4, 0) +#define EX_DATA_REG_ADDR_SHIFT 5 +#define EX_DATA_REG_ADDR GENMASK(9, 5) + #define EX_DATA_REG(reg, gpr) \ "((.L__gpr_num_" #gpr ") << " __stringify(EX_DATA_REG_##reg##_SHIFT) ")" @@ -60,6 +68,19 @@ #define _ASM_EXTABLE_UACCESS_ERR(insn, fixup, err) \ _ASM_EXTABLE_UACCESS_ERR_ZERO(insn, fixup, err, zero) -#endif /* __ASSEMBLY__ */ +#define _ASM_EXTABLE_LOAD_UNALIGNED_ZEROPAD(insn, fixup, data, addr) \ + __DEFINE_ASM_GPR_NUMS \ + __ASM_EXTABLE_RAW(#insn, #fixup, \ + __stringify(EX_TYPE_LOAD_UNALIGNED_ZEROPAD), \ + "(" \ + EX_DATA_REG(DATA, data) " | " \ + EX_DATA_REG(ADDR, addr) \ + ")") + +#endif /* __ASSEMBLER__ */ + +#else /* CONFIG_MMU */ + #define _ASM_EXTABLE_UACCESS_ERR(insn, fixup, err) +#endif /* CONFIG_MMU */ #endif /* __ASM_ASM_EXTABLE_H */ |