132 lines
2.4 KiB
C
132 lines
2.4 KiB
C
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/* SPDX-License-Identifier: GPL-2.0 */
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#ifndef _ASM_S390_NOSPEC_ASM_H
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#define _ASM_S390_NOSPEC_ASM_H
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#include <asm/dwarf.h>
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#ifdef __ASSEMBLY__
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#ifdef CC_USING_EXPOLINE
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/*
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* The expoline macros are used to create thunks in the same format
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* as gcc generates them. The 'comdat' section flag makes sure that
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* the various thunks are merged into a single copy.
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*/
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.macro __THUNK_PROLOG_NAME name
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#ifdef CONFIG_EXPOLINE_EXTERN
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.pushsection .text,"ax",@progbits
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.align 16,0x07
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#else
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.pushsection .text.\name,"axG",@progbits,\name,comdat
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#endif
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.globl \name
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.hidden \name
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.type \name,@function
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\name:
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CFI_STARTPROC
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.endm
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.macro __THUNK_EPILOG_NAME name
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CFI_ENDPROC
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#ifdef CONFIG_EXPOLINE_EXTERN
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.size \name, .-\name
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#endif
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.popsection
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.endm
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.macro __THUNK_PROLOG_BR r1
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__THUNK_PROLOG_NAME __s390_indirect_jump_r\r1
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.endm
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.macro __THUNK_EPILOG_BR r1
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__THUNK_EPILOG_NAME __s390_indirect_jump_r\r1
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.endm
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.macro __THUNK_BR r1
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jg __s390_indirect_jump_r\r1
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.endm
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.macro __THUNK_BRASL r1,r2
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brasl \r1,__s390_indirect_jump_r\r2
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.endm
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.macro __DECODE_R expand,reg
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.set .L__decode_fail,1
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.irp r1,0,1,2,3,4,5,6,7,8,9,10,11,12,13,14,15
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.ifc \reg,%r\r1
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\expand \r1
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.set .L__decode_fail,0
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.endif
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.endr
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.if .L__decode_fail == 1
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.error "__DECODE_R failed"
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.endif
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.endm
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.macro __DECODE_RR expand,rsave,rtarget
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.set .L__decode_fail,1
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.irp r1,0,1,2,3,4,5,6,7,8,9,10,11,12,13,14,15
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.ifc \rsave,%r\r1
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.irp r2,0,1,2,3,4,5,6,7,8,9,10,11,12,13,14,15
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.ifc \rtarget,%r\r2
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\expand \r1,\r2
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.set .L__decode_fail,0
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.endif
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.endr
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.endif
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.endr
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.if .L__decode_fail == 1
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.error "__DECODE_RR failed"
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.endif
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.endm
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.macro __THUNK_EX_BR reg
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exrl 0,555f
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j .
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555: br \reg
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.endm
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#ifdef CONFIG_EXPOLINE_EXTERN
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.macro GEN_BR_THUNK reg
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.endm
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.macro GEN_BR_THUNK_EXTERN reg
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#else
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.macro GEN_BR_THUNK reg
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#endif
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__DECODE_R __THUNK_PROLOG_BR,\reg
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__THUNK_EX_BR \reg
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__DECODE_R __THUNK_EPILOG_BR,\reg
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.endm
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.macro BR_EX reg
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557: __DECODE_R __THUNK_BR,\reg
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.pushsection .s390_indirect_branches,"a",@progbits
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.long 557b-.
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.popsection
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.endm
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.macro BASR_EX rsave,rtarget
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559: __DECODE_RR __THUNK_BRASL,\rsave,\rtarget
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.pushsection .s390_indirect_branches,"a",@progbits
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.long 559b-.
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.popsection
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.endm
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#else
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.macro GEN_BR_THUNK reg
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.endm
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.macro BR_EX reg
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br \reg
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.endm
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.macro BASR_EX rsave,rtarget
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basr \rsave,\rtarget
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.endm
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#endif /* CC_USING_EXPOLINE */
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#endif /* __ASSEMBLY__ */
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#endif /* _ASM_S390_NOSPEC_ASM_H */
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