| /* SPDX-License-Identifier: GPL-2.0-only */ |
| #ifndef __ASM_ASM_EXTABLE_H |
| #define __ASM_ASM_EXTABLE_H |
| |
| #define EX_TYPE_NONE 0 |
| #define EX_TYPE_FIXUP 1 |
| #define EX_TYPE_BPF 2 |
| #define EX_TYPE_UACCESS_ERR_ZERO 3 |
| |
| #ifdef __ASSEMBLY__ |
| |
| #define __ASM_EXTABLE_RAW(insn, fixup, type, data) \ |
| .pushsection __ex_table, "a"; \ |
| .balign 4; \ |
| .long ((insn) - .); \ |
| .long ((fixup) - .); \ |
| .short (type); \ |
| .short (data); \ |
| .popsection; |
| |
| .macro _asm_extable, insn, fixup |
| __ASM_EXTABLE_RAW(\insn, \fixup, EX_TYPE_FIXUP, 0) |
| .endm |
| |
| #else /* __ASSEMBLY__ */ |
| |
| #include <linux/bits.h> |
| #include <linux/stringify.h> |
| #include <asm/gpr-num.h> |
| |
| #define __ASM_EXTABLE_RAW(insn, fixup, type, data) \ |
| ".pushsection __ex_table, \"a\"\n" \ |
| ".balign 4\n" \ |
| ".long ((" insn ") - .)\n" \ |
| ".long ((" fixup ") - .)\n" \ |
| ".short (" type ")\n" \ |
| ".short (" data ")\n" \ |
| ".popsection\n" |
| |
| #define _ASM_EXTABLE(insn, fixup) \ |
| __ASM_EXTABLE_RAW(#insn, #fixup, __stringify(EX_TYPE_FIXUP), "0") |
| |
| #define EX_DATA_REG_ERR_SHIFT 0 |
| #define EX_DATA_REG_ERR GENMASK(4, 0) |
| #define EX_DATA_REG_ZERO_SHIFT 5 |
| #define EX_DATA_REG_ZERO GENMASK(9, 5) |
| |
| #define EX_DATA_REG(reg, gpr) \ |
| "((.L__gpr_num_" #gpr ") << " __stringify(EX_DATA_REG_##reg##_SHIFT) ")" |
| |
| #define _ASM_EXTABLE_UACCESS_ERR_ZERO(insn, fixup, err, zero) \ |
| __DEFINE_ASM_GPR_NUMS \ |
| __ASM_EXTABLE_RAW(#insn, #fixup, \ |
| __stringify(EX_TYPE_UACCESS_ERR_ZERO), \ |
| "(" \ |
| EX_DATA_REG(ERR, err) " | " \ |
| EX_DATA_REG(ZERO, zero) \ |
| ")") |
| |
| #define _ASM_EXTABLE_UACCESS_ERR(insn, fixup, err) \ |
| _ASM_EXTABLE_UACCESS_ERR_ZERO(insn, fixup, err, zero) |
| |
| #endif /* __ASSEMBLY__ */ |
| |
| #endif /* __ASM_ASM_EXTABLE_H */ |