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- /* SPDX-License-Identifier: GPL-2.0 */
- #ifndef __ASM_EXTABLE_H
- #define __ASM_EXTABLE_H
- #include <linux/stringify.h>
- #include <linux/bits.h>
- #include <asm/asm-const.h>
- #define EX_TYPE_NONE 0
- #define EX_TYPE_FIXUP 1
- #define EX_TYPE_BPF 2
- #define EX_TYPE_UA_STORE 3
- #define EX_TYPE_UA_LOAD_MEM 4
- #define EX_TYPE_UA_LOAD_REG 5
- #define EX_DATA_REG_ERR_SHIFT 0
- #define EX_DATA_REG_ERR GENMASK(3, 0)
- #define EX_DATA_REG_ADDR_SHIFT 4
- #define EX_DATA_REG_ADDR GENMASK(7, 4)
- #define EX_DATA_LEN_SHIFT 8
- #define EX_DATA_LEN GENMASK(11, 8)
- #define __EX_TABLE(_section, _fault, _target, _type) \
- stringify_in_c(.section _section,"a";) \
- stringify_in_c(.align 4;) \
- stringify_in_c(.long (_fault) - .;) \
- stringify_in_c(.long (_target) - .;) \
- stringify_in_c(.short (_type);) \
- stringify_in_c(.short 0;) \
- stringify_in_c(.previous)
- #define __EX_TABLE_UA(_section, _fault, _target, _type, _regerr, _regaddr, _len)\
- stringify_in_c(.section _section,"a";) \
- stringify_in_c(.align 4;) \
- stringify_in_c(.long (_fault) - .;) \
- stringify_in_c(.long (_target) - .;) \
- stringify_in_c(.short (_type);) \
- stringify_in_c(.macro extable_reg regerr, regaddr;) \
- stringify_in_c(.set .Lfound, 0;) \
- stringify_in_c(.set .Lcurr, 0;) \
- stringify_in_c(.irp rs,0,1,2,3,4,5,6,7,8,9,10,11,12,13,14,15;) \
- stringify_in_c( .ifc "\regerr", "%%r\rs";) \
- stringify_in_c( .set .Lfound, 1;) \
- stringify_in_c( .set .Lregerr, .Lcurr;) \
- stringify_in_c( .endif;) \
- stringify_in_c( .set .Lcurr, .Lcurr+1;) \
- stringify_in_c(.endr;) \
- stringify_in_c(.ifne (.Lfound != 1);) \
- stringify_in_c( .error "extable_reg: bad register argument1";) \
- stringify_in_c(.endif;) \
- stringify_in_c(.set .Lfound, 0;) \
- stringify_in_c(.set .Lcurr, 0;) \
- stringify_in_c(.irp rs,0,1,2,3,4,5,6,7,8,9,10,11,12,13,14,15;) \
- stringify_in_c( .ifc "\regaddr", "%%r\rs";) \
- stringify_in_c( .set .Lfound, 1;) \
- stringify_in_c( .set .Lregaddr, .Lcurr;) \
- stringify_in_c( .endif;) \
- stringify_in_c( .set .Lcurr, .Lcurr+1;) \
- stringify_in_c(.endr;) \
- stringify_in_c(.ifne (.Lfound != 1);) \
- stringify_in_c( .error "extable_reg: bad register argument2";) \
- stringify_in_c(.endif;) \
- stringify_in_c(.short .Lregerr << EX_DATA_REG_ERR_SHIFT | \
- .Lregaddr << EX_DATA_REG_ADDR_SHIFT | \
- _len << EX_DATA_LEN_SHIFT;) \
- stringify_in_c(.endm;) \
- stringify_in_c(extable_reg _regerr,_regaddr;) \
- stringify_in_c(.purgem extable_reg;) \
- stringify_in_c(.previous)
- #define EX_TABLE(_fault, _target) \
- __EX_TABLE(__ex_table, _fault, _target, EX_TYPE_FIXUP)
- #define EX_TABLE_AMODE31(_fault, _target) \
- __EX_TABLE(.amode31.ex_table, _fault, _target, EX_TYPE_FIXUP)
- #define EX_TABLE_UA_STORE(_fault, _target, _regerr) \
- __EX_TABLE_UA(__ex_table, _fault, _target, EX_TYPE_UA_STORE, _regerr, _regerr, 0)
- #define EX_TABLE_UA_LOAD_MEM(_fault, _target, _regerr, _regmem, _len) \
- __EX_TABLE_UA(__ex_table, _fault, _target, EX_TYPE_UA_LOAD_MEM, _regerr, _regmem, _len)
- #define EX_TABLE_UA_LOAD_REG(_fault, _target, _regerr, _regzero) \
- __EX_TABLE_UA(__ex_table, _fault, _target, EX_TYPE_UA_LOAD_REG, _regerr, _regzero, 0)
- #endif /* __ASM_EXTABLE_H */
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