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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_TYPE_UA_LOAD_REGPAIR 6 #define EX_TYPE_ZEROPAD 7 #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, _regerr, _regaddr, _len) \ stringify_in_c(.section _section,"a";) \ stringify_in_c(.balign 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, __stringify(%%r0), __stringify(%%r0), 0) #define EX_TABLE_AMODE31(_fault, _target) \ __EX_TABLE(.amode31.ex_table, _fault, _target, EX_TYPE_FIXUP, __stringify(%%r0), __stringify(%%r0), 0) #define EX_TABLE_UA_STORE(_fault, _target, _regerr) \ __EX_TABLE(__ex_table, _fault, _target, EX_TYPE_UA_STORE, _regerr, _regerr, 0) #define EX_TABLE_UA_LOAD_MEM(_fault, _target, _regerr, _regmem, _len) \ __EX_TABLE(__ex_table, _fault, _target, EX_TYPE_UA_LOAD_MEM, _regerr, _regmem, _len) #define EX_TABLE_UA_LOAD_REG(_fault, _target, _regerr, _regzero) \ __EX_TABLE(__ex_table, _fault, _target, EX_TYPE_UA_LOAD_REG, _regerr, _regzero, 0) #define EX_TABLE_UA_LOAD_REGPAIR(_fault, _target, _regerr, _regzero) \ __EX_TABLE(__ex_table, _fault, _target, EX_TYPE_UA_LOAD_REGPAIR, _regerr, _regzero, 0) #define EX_TABLE_ZEROPAD(_fault, _target, _regdata, _regaddr) \ __EX_TABLE(__ex_table, _fault, _target, EX_TYPE_ZEROPAD, _regdata, _regaddr, 0) #endif /* __ASM_EXTABLE_H */