| /* 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 */ |
