Viewing file:  asm-extable.h (3.31 KB) -rw-r--r--
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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 */
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