16dd10d91SJisheng Zhang /* SPDX-License-Identifier: GPL-2.0-only */ 26dd10d91SJisheng Zhang #ifndef __ASM_ASM_EXTABLE_H 36dd10d91SJisheng Zhang #define __ASM_ASM_EXTABLE_H 46dd10d91SJisheng Zhang 52bf847dbSJisheng Zhang #define EX_TYPE_NONE 0 62bf847dbSJisheng Zhang #define EX_TYPE_FIXUP 1 72bf847dbSJisheng Zhang #define EX_TYPE_BPF 2 8*20802d8dSJisheng Zhang #define EX_TYPE_UACCESS_ERR_ZERO 3 92bf847dbSJisheng Zhang 106dd10d91SJisheng Zhang #ifdef __ASSEMBLY__ 116dd10d91SJisheng Zhang 122bf847dbSJisheng Zhang #define __ASM_EXTABLE_RAW(insn, fixup, type, data) \ 136dd10d91SJisheng Zhang .pushsection __ex_table, "a"; \ 146dd10d91SJisheng Zhang .balign 4; \ 156dd10d91SJisheng Zhang .long ((insn) - .); \ 166dd10d91SJisheng Zhang .long ((fixup) - .); \ 172bf847dbSJisheng Zhang .short (type); \ 182bf847dbSJisheng Zhang .short (data); \ 196dd10d91SJisheng Zhang .popsection; 206dd10d91SJisheng Zhang 216dd10d91SJisheng Zhang .macro _asm_extable, insn, fixup 222bf847dbSJisheng Zhang __ASM_EXTABLE_RAW(\insn, \fixup, EX_TYPE_FIXUP, 0) 236dd10d91SJisheng Zhang .endm 246dd10d91SJisheng Zhang 256dd10d91SJisheng Zhang #else /* __ASSEMBLY__ */ 266dd10d91SJisheng Zhang 27*20802d8dSJisheng Zhang #include <linux/bits.h> 286dd10d91SJisheng Zhang #include <linux/stringify.h> 29*20802d8dSJisheng Zhang #include <asm/gpr-num.h> 306dd10d91SJisheng Zhang 312bf847dbSJisheng Zhang #define __ASM_EXTABLE_RAW(insn, fixup, type, data) \ 326dd10d91SJisheng Zhang ".pushsection __ex_table, \"a\"\n" \ 336dd10d91SJisheng Zhang ".balign 4\n" \ 346dd10d91SJisheng Zhang ".long ((" insn ") - .)\n" \ 356dd10d91SJisheng Zhang ".long ((" fixup ") - .)\n" \ 362bf847dbSJisheng Zhang ".short (" type ")\n" \ 372bf847dbSJisheng Zhang ".short (" data ")\n" \ 386dd10d91SJisheng Zhang ".popsection\n" 396dd10d91SJisheng Zhang 402bf847dbSJisheng Zhang #define _ASM_EXTABLE(insn, fixup) \ 412bf847dbSJisheng Zhang __ASM_EXTABLE_RAW(#insn, #fixup, __stringify(EX_TYPE_FIXUP), "0") 426dd10d91SJisheng Zhang 43*20802d8dSJisheng Zhang #define EX_DATA_REG_ERR_SHIFT 0 44*20802d8dSJisheng Zhang #define EX_DATA_REG_ERR GENMASK(4, 0) 45*20802d8dSJisheng Zhang #define EX_DATA_REG_ZERO_SHIFT 5 46*20802d8dSJisheng Zhang #define EX_DATA_REG_ZERO GENMASK(9, 5) 47*20802d8dSJisheng Zhang 48*20802d8dSJisheng Zhang #define EX_DATA_REG(reg, gpr) \ 49*20802d8dSJisheng Zhang "((.L__gpr_num_" #gpr ") << " __stringify(EX_DATA_REG_##reg##_SHIFT) ")" 50*20802d8dSJisheng Zhang 51*20802d8dSJisheng Zhang #define _ASM_EXTABLE_UACCESS_ERR_ZERO(insn, fixup, err, zero) \ 52*20802d8dSJisheng Zhang __DEFINE_ASM_GPR_NUMS \ 53*20802d8dSJisheng Zhang __ASM_EXTABLE_RAW(#insn, #fixup, \ 54*20802d8dSJisheng Zhang __stringify(EX_TYPE_UACCESS_ERR_ZERO), \ 55*20802d8dSJisheng Zhang "(" \ 56*20802d8dSJisheng Zhang EX_DATA_REG(ERR, err) " | " \ 57*20802d8dSJisheng Zhang EX_DATA_REG(ZERO, zero) \ 58*20802d8dSJisheng Zhang ")") 59*20802d8dSJisheng Zhang 60*20802d8dSJisheng Zhang #define _ASM_EXTABLE_UACCESS_ERR(insn, fixup, err) \ 61*20802d8dSJisheng Zhang _ASM_EXTABLE_UACCESS_ERR_ZERO(insn, fixup, err, zero) 62*20802d8dSJisheng Zhang 636dd10d91SJisheng Zhang #endif /* __ASSEMBLY__ */ 646dd10d91SJisheng Zhang 656dd10d91SJisheng Zhang #endif /* __ASM_ASM_EXTABLE_H */ 66