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/* SPDX-License-Identifier: GPL-2.0 */
#ifndef _ASM_S390_NOSPEC_ASM_H
#define _ASM_S390_NOSPEC_ASM_H
#include <linux/linkage.h>
#include <asm/dwarf.h>
#ifdef __ASSEMBLY__
#ifdef CC_USING_EXPOLINE
/*
* The expoline macros are used to create thunks in the same format
* as gcc generates them. The 'comdat' section flag makes sure that
* the various thunks are merged into a single copy.
*/
.macro __THUNK_PROLOG_NAME name
#ifdef CONFIG_EXPOLINE_EXTERN
SYM_CODE_START(\name)
#else
.pushsection .text.\name,"axG",@progbits,\name,comdat
.globl \name
.hidden \name
.type \name,@function
\name:
CFI_STARTPROC
#endif
.endm
.macro __THUNK_EPILOG_NAME name
#ifdef CONFIG_EXPOLINE_EXTERN
SYM_CODE_END(\name)
EXPORT_SYMBOL(\name)
#else
CFI_ENDPROC
.popsection
#endif
.endm
.macro __THUNK_PROLOG_BR r1
__THUNK_PROLOG_NAME __s390_indirect_jump_r\r1
.endm
.macro __THUNK_EPILOG_BR r1
__THUNK_EPILOG_NAME __s390_indirect_jump_r\r1
.endm
.macro __THUNK_BR r1
jg __s390_indirect_jump_r\r1
.endm
.macro __THUNK_BRASL r1,r2
brasl \r1,__s390_indirect_jump_r\r2
.endm
.macro __DECODE_R expand,reg
.set .L__decode_fail,1
.irp r1,0,1,2,3,4,5,6,7,8,9,10,11,12,13,14,15
.ifc \reg,%r\r1
\expand \r1
.set .L__decode_fail,0
.endif
.endr
.if .L__decode_fail == 1
.error "__DECODE_R failed"
.endif
.endm
.macro __DECODE_RR expand,rsave,rtarget
.set .L__decode_fail,1
.irp r1,0,1,2,3,4,5,6,7,8,9,10,11,12,13,14,15
.ifc \rsave,%r\r1
.irp r2,0,1,2,3,4,5,6,7,8,9,10,11,12,13,14,15
.ifc \rtarget,%r\r2
\expand \r1,\r2
.set .L__decode_fail,0
.endif
.endr
.endif
.endr
.if .L__decode_fail == 1
.error "__DECODE_RR failed"
.endif
.endm
.macro __THUNK_EX_BR reg
exrl 0,555f
j .
555: br \reg
.endm
#ifdef CONFIG_EXPOLINE_EXTERN
.macro GEN_BR_THUNK reg
.endm
.macro GEN_BR_THUNK_EXTERN reg
#else
.macro GEN_BR_THUNK reg
#endif
__DECODE_R __THUNK_PROLOG_BR,\reg
__THUNK_EX_BR \reg
__DECODE_R __THUNK_EPILOG_BR,\reg
.endm
.macro BR_EX reg
557: __DECODE_R __THUNK_BR,\reg
.pushsection .s390_indirect_branches,"a",@progbits
.long 557b-.
.popsection
.endm
.macro BASR_EX rsave,rtarget
559: __DECODE_RR __THUNK_BRASL,\rsave,\rtarget
.pushsection .s390_indirect_branches,"a",@progbits
.long 559b-.
.popsection
.endm
#else
.macro GEN_BR_THUNK reg
.endm
.macro BR_EX reg
br \reg
.endm
.macro BASR_EX rsave,rtarget
basr \rsave,\rtarget
.endm
#endif /* CC_USING_EXPOLINE */
#endif /* __ASSEMBLY__ */
#endif /* _ASM_S390_NOSPEC_ASM_H */
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