/* 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 */