| /* 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_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) |
| |
| #define EX_TABLE_UA_LOAD_REGPAIR(_fault, _target, _regerr, _regzero) \ |
| __EX_TABLE_UA(__ex_table, _fault, _target, EX_TYPE_UA_LOAD_REGPAIR, _regerr, _regzero, 0) |
| |
| #endif /* __ASM_EXTABLE_H */ |