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torvalds
GitHub Repository: torvalds/linux
 Path: blob/master/arch/s390/include/asm/asm-extable.h
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/* SPDX-License-Identifier: GPL-2.0 */

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#ifndef __ASM_EXTABLE_H

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#define __ASM_EXTABLE_H

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#include <linux/stringify.h>

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#include <linux/bits.h>

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#include <asm/asm-const.h>

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#define EX_TYPE_NONE		0

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#define EX_TYPE_FIXUP		1

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#define EX_TYPE_BPF		2

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#define EX_TYPE_UA_FAULT	3

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#define EX_TYPE_UA_LOAD_REG	5

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#define EX_TYPE_UA_LOAD_REGPAIR	6

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#define EX_TYPE_ZEROPAD		7

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#define EX_TYPE_FPC		8

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#define EX_TYPE_UA_MVCOS_TO	9

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#define EX_TYPE_UA_MVCOS_FROM	10

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#define EX_DATA_REG_ERR_SHIFT	0

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#define EX_DATA_REG_ERR		GENMASK(3, 0)

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#define EX_DATA_REG_ADDR_SHIFT	4

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#define EX_DATA_REG_ADDR	GENMASK(7, 4)

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#define EX_DATA_LEN_SHIFT	8

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#define EX_DATA_LEN		GENMASK(11, 8)

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#define __EX_TABLE(_section, _fault, _target, _type, _regerr, _regaddr, _len)	\

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	stringify_in_c(.section _section,"a";)					\

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	stringify_in_c(.balign	4;)						\

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	stringify_in_c(.long	(_fault) - .;)					\

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	stringify_in_c(.long	(_target) - .;)					\

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	stringify_in_c(.short	(_type);)					\

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	stringify_in_c(.macro	extable_reg regerr, regaddr;)			\

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	stringify_in_c(.set	.Lfound, 0;)					\

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	stringify_in_c(.set	.Lcurr, 0;)					\

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	stringify_in_c(.irp	rs,0,1,2,3,4,5,6,7,8,9,10,11,12,13,14,15;)	\

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	stringify_in_c(		.ifc	"\regerr", "%%r\rs";)			\

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	stringify_in_c(			.set	.Lfound, 1;)			\

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	stringify_in_c(			.set	.Lregerr, .Lcurr;)		\

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	stringify_in_c(		.endif;)					\

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	stringify_in_c(		.set	.Lcurr, .Lcurr+1;)			\

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	stringify_in_c(.endr;)							\

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	stringify_in_c(.ifne	(.Lfound != 1);)				\

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	stringify_in_c(		.error	"extable_reg: bad register argument1";)	\

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	stringify_in_c(.endif;)							\

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	stringify_in_c(.set	.Lfound, 0;)					\

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	stringify_in_c(.set	.Lcurr, 0;)					\

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	stringify_in_c(.irp	rs,0,1,2,3,4,5,6,7,8,9,10,11,12,13,14,15;)	\

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	stringify_in_c(		.ifc	"\regaddr", "%%r\rs";)			\

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	stringify_in_c(			.set	.Lfound, 1;)			\

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	stringify_in_c(			.set	.Lregaddr, .Lcurr;)		\

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	stringify_in_c(		.endif;)					\

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	stringify_in_c(		.set	.Lcurr, .Lcurr+1;)			\

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	stringify_in_c(.endr;)							\

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	stringify_in_c(.ifne	(.Lfound != 1);)				\

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	stringify_in_c(		.error	"extable_reg: bad register argument2";)	\

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	stringify_in_c(.endif;)							\

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	stringify_in_c(.short	.Lregerr << EX_DATA_REG_ERR_SHIFT |		\

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				.Lregaddr << EX_DATA_REG_ADDR_SHIFT |		\

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				_len << EX_DATA_LEN_SHIFT;)			\

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	stringify_in_c(.endm;)							\

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	stringify_in_c(extable_reg _regerr,_regaddr;)				\

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	stringify_in_c(.purgem	extable_reg;)					\

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	stringify_in_c(.previous)

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#define EX_TABLE(_fault, _target)					\

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	__EX_TABLE(__ex_table, _fault, _target, EX_TYPE_FIXUP, __stringify(%%r0), __stringify(%%r0), 0)

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#define EX_TABLE_AMODE31(_fault, _target)				\

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	__EX_TABLE(.amode31.ex_table, _fault, _target, EX_TYPE_FIXUP, __stringify(%%r0), __stringify(%%r0), 0)

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#define EX_TABLE_UA_FAULT(_fault, _target, _regerr)			\

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	__EX_TABLE(__ex_table, _fault, _target, EX_TYPE_UA_FAULT, _regerr, _regerr, 0)

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#define EX_TABLE_UA_LOAD_REG(_fault, _target, _regerr, _regzero)	\

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	__EX_TABLE(__ex_table, _fault, _target, EX_TYPE_UA_LOAD_REG, _regerr, _regzero, 0)

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#define EX_TABLE_UA_LOAD_REGPAIR(_fault, _target, _regerr, _regzero)	\

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	__EX_TABLE(__ex_table, _fault, _target, EX_TYPE_UA_LOAD_REGPAIR, _regerr, _regzero, 0)

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#define EX_TABLE_ZEROPAD(_fault, _target, _regdata, _regaddr)		\

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	__EX_TABLE(__ex_table, _fault, _target, EX_TYPE_ZEROPAD, _regdata, _regaddr, 0)

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#define EX_TABLE_FPC(_fault, _target)					\

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	__EX_TABLE(__ex_table, _fault, _target, EX_TYPE_FPC, __stringify(%%r0), __stringify(%%r0), 0)

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#define EX_TABLE_UA_MVCOS_TO(_fault, _target)				\

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	__EX_TABLE(__ex_table, _fault, _target, EX_TYPE_UA_MVCOS_TO, __stringify(%%r0), __stringify(%%r0), 0)

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#define EX_TABLE_UA_MVCOS_FROM(_fault, _target)				\

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	__EX_TABLE(__ex_table, _fault, _target, EX_TYPE_UA_MVCOS_FROM, __stringify(%%r0), __stringify(%%r0), 0)

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#endif /* __ASM_EXTABLE_H */

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