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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 .pushsection .text,"ax",@progbits __ALIGN #else .pushsection .text.\name,"axG",@progbits,\name,comdat #endif .globl \name .hidden \name .type \name,@function \name: CFI_STARTPROC .endm .macro __THUNK_EPILOG_NAME name CFI_ENDPROC #ifdef CONFIG_EXPOLINE_EXTERN .size \name, .-\name #endif .popsection .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 */