1 /* SPDX-License-Identifier: GPL-2.0 */ 2 #ifndef __ASM_EXTABLE_H 3 #define __ASM_EXTABLE_H 4 5 #include <linux/stringify.h> 6 #include <linux/bits.h> 7 #include <asm/asm-const.h> 8 9 #define EX_TYPE_NONE 0 10 #define EX_TYPE_FIXUP 1 11 #define EX_TYPE_BPF 2 12 #define EX_TYPE_UA_STORE 3 13 #define EX_TYPE_UA_LOAD_MEM 4 14 #define EX_TYPE_UA_LOAD_REG 5 15 #define EX_TYPE_UA_LOAD_REGPAIR 6 16 17 #define EX_DATA_REG_ERR_SHIFT 0 18 #define EX_DATA_REG_ERR GENMASK(3, 0) 19 20 #define EX_DATA_REG_ADDR_SHIFT 4 21 #define EX_DATA_REG_ADDR GENMASK(7, 4) 22 23 #define EX_DATA_LEN_SHIFT 8 24 #define EX_DATA_LEN GENMASK(11, 8) 25 26 #define __EX_TABLE(_section, _fault, _target, _type) \ 27 stringify_in_c(.section _section,"a";) \ 28 stringify_in_c(.balign 4;) \ 29 stringify_in_c(.long (_fault) - .;) \ 30 stringify_in_c(.long (_target) - .;) \ 31 stringify_in_c(.short (_type);) \ 32 stringify_in_c(.short 0;) \ 33 stringify_in_c(.previous) 34 35 #define __EX_TABLE_UA(_section, _fault, _target, _type, _regerr, _regaddr, _len)\ 36 stringify_in_c(.section _section,"a";) \ 37 stringify_in_c(.balign 4;) \ 38 stringify_in_c(.long (_fault) - .;) \ 39 stringify_in_c(.long (_target) - .;) \ 40 stringify_in_c(.short (_type);) \ 41 stringify_in_c(.macro extable_reg regerr, regaddr;) \ 42 stringify_in_c(.set .Lfound, 0;) \ 43 stringify_in_c(.set .Lcurr, 0;) \ 44 stringify_in_c(.irp rs,0,1,2,3,4,5,6,7,8,9,10,11,12,13,14,15;) \ 45 stringify_in_c( .ifc "\regerr", "%%r\rs";) \ 46 stringify_in_c( .set .Lfound, 1;) \ 47 stringify_in_c( .set .Lregerr, .Lcurr;) \ 48 stringify_in_c( .endif;) \ 49 stringify_in_c( .set .Lcurr, .Lcurr+1;) \ 50 stringify_in_c(.endr;) \ 51 stringify_in_c(.ifne (.Lfound != 1);) \ 52 stringify_in_c( .error "extable_reg: bad register argument1";) \ 53 stringify_in_c(.endif;) \ 54 stringify_in_c(.set .Lfound, 0;) \ 55 stringify_in_c(.set .Lcurr, 0;) \ 56 stringify_in_c(.irp rs,0,1,2,3,4,5,6,7,8,9,10,11,12,13,14,15;) \ 57 stringify_in_c( .ifc "\regaddr", "%%r\rs";) \ 58 stringify_in_c( .set .Lfound, 1;) \ 59 stringify_in_c( .set .Lregaddr, .Lcurr;) \ 60 stringify_in_c( .endif;) \ 61 stringify_in_c( .set .Lcurr, .Lcurr+1;) \ 62 stringify_in_c(.endr;) \ 63 stringify_in_c(.ifne (.Lfound != 1);) \ 64 stringify_in_c( .error "extable_reg: bad register argument2";) \ 65 stringify_in_c(.endif;) \ 66 stringify_in_c(.short .Lregerr << EX_DATA_REG_ERR_SHIFT | \ 67 .Lregaddr << EX_DATA_REG_ADDR_SHIFT | \ 68 _len << EX_DATA_LEN_SHIFT;) \ 69 stringify_in_c(.endm;) \ 70 stringify_in_c(extable_reg _regerr,_regaddr;) \ 71 stringify_in_c(.purgem extable_reg;) \ 72 stringify_in_c(.previous) 73 74 #define EX_TABLE(_fault, _target) \ 75 __EX_TABLE(__ex_table, _fault, _target, EX_TYPE_FIXUP) 76 77 #define EX_TABLE_AMODE31(_fault, _target) \ 78 __EX_TABLE(.amode31.ex_table, _fault, _target, EX_TYPE_FIXUP) 79 80 #define EX_TABLE_UA_STORE(_fault, _target, _regerr) \ 81 __EX_TABLE_UA(__ex_table, _fault, _target, EX_TYPE_UA_STORE, _regerr, _regerr, 0) 82 83 #define EX_TABLE_UA_LOAD_MEM(_fault, _target, _regerr, _regmem, _len) \ 84 __EX_TABLE_UA(__ex_table, _fault, _target, EX_TYPE_UA_LOAD_MEM, _regerr, _regmem, _len) 85 86 #define EX_TABLE_UA_LOAD_REG(_fault, _target, _regerr, _regzero) \ 87 __EX_TABLE_UA(__ex_table, _fault, _target, EX_TYPE_UA_LOAD_REG, _regerr, _regzero, 0) 88 89 #define EX_TABLE_UA_LOAD_REGPAIR(_fault, _target, _regerr, _regzero) \ 90 __EX_TABLE_UA(__ex_table, _fault, _target, EX_TYPE_UA_LOAD_REGPAIR, _regerr, _regzero, 0) 91 92 #endif /* __ASM_EXTABLE_H */ 93