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// Copyright 2016 The Go Authors. All rights reserved. // Use of this source code is governed by a BSD-style // license that can be found in the LICENSE file. #include "textflag.h" // // System calls for s390x, Linux // // func Syscall(trap int64, a1, a2, a3 int64) (r1, r2, err int64) TEXT ·Syscall(SB),NOSPLIT,$0-56 BL runtime·entersyscall(SB) MOVD a1+8(FP), R2 MOVD a2+16(FP), R3 MOVD a3+24(FP), R4 MOVD $0, R5 MOVD $0, R6 MOVD $0, R7 MOVD trap+0(FP), R1 // syscall entry SYSCALL MOVD $0xfffffffffffff001, R8 CMPUBLT R2, R8, ok MOVD $-1, r1+32(FP) MOVD $0, r2+40(FP) NEG R2, R2 MOVD R2, err+48(FP) // errno BL runtime·exitsyscall(SB) RET ok: MOVD R2, r1+32(FP) MOVD R3, r2+40(FP) MOVD $0, err+48(FP) // errno BL runtime·exitsyscall(SB) RET // func Syscall6(trap, a1, a2, a3, a4, a5, a6 uintptr) (r1, r2, err uintptr) TEXT ·Syscall6(SB),NOSPLIT,$0-80 BL runtime·entersyscall(SB) MOVD a1+8(FP), R2 MOVD a2+16(FP), R3 MOVD a3+24(FP), R4 MOVD a4+32(FP), R5 MOVD a5+40(FP), R6 MOVD a6+48(FP), R7 MOVD trap+0(FP), R1 // syscall entry SYSCALL MOVD $0xfffffffffffff001, R8 CMPUBLT R2, R8, ok6 MOVD $-1, r1+56(FP) MOVD $0, r2+64(FP) NEG R2, R2 MOVD R2, err+72(FP) // errno BL runtime·exitsyscall(SB) RET ok6: MOVD R2, r1+56(FP) MOVD R3, r2+64(FP) MOVD $0, err+72(FP) // errno BL runtime·exitsyscall(SB) RET // func RawSyscall(trap, a1, a2, a3 uintptr) (r1, r2, err uintptr) TEXT ·RawSyscall(SB),NOSPLIT,$0-56 MOVD a1+8(FP), R2 MOVD a2+16(FP), R3 MOVD a3+24(FP), R4 MOVD $0, R5 MOVD $0, R6 MOVD $0, R7 MOVD trap+0(FP), R1 // syscall entry SYSCALL MOVD $0xfffffffffffff001, R8 CMPUBLT R2, R8, ok1 MOVD $-1, r1+32(FP) MOVD $0, r2+40(FP) NEG R2, R2 MOVD R2, err+48(FP) // errno RET ok1: MOVD R2, r1+32(FP) MOVD R3, r2+40(FP) MOVD $0, err+48(FP) // errno RET // func RawSyscall6(trap, a1, a2, a3, a4, a5, a6 uintptr) (r1, r2, err uintptr) TEXT ·RawSyscall6(SB),NOSPLIT,$0-80 MOVD a1+8(FP), R2 MOVD a2+16(FP), R3 MOVD a3+24(FP), R4 MOVD a4+32(FP), R5 MOVD a5+40(FP), R6 MOVD a6+48(FP), R7 MOVD trap+0(FP), R1 // syscall entry SYSCALL MOVD $0xfffffffffffff001, R8 CMPUBLT R2, R8, ok2 MOVD $-1, r1+56(FP) MOVD $0, r2+64(FP) NEG R2, R2 MOVD R2, err+72(FP) // errno RET ok2: MOVD R2, r1+56(FP) MOVD R3, r2+64(FP) MOVD $0, err+72(FP) // errno RET // func rawVforkSyscall(trap, a1 uintptr) (r1, err uintptr) TEXT ·rawVforkSyscall(SB),NOSPLIT|NOFRAME,$0-32 MOVD $0, R2 MOVD a1+8(FP), R3 MOVD $0, R4 MOVD $0, R5 MOVD $0, R6 MOVD $0, R7 MOVD trap+0(FP), R1 // syscall entry SYSCALL MOVD $0xfffffffffffff001, R8 CMPUBLT R2, R8, ok2 MOVD $-1, r1+16(FP) NEG R2, R2 MOVD R2, err+24(FP) // errno RET ok2: MOVD R2, r1+16(FP) MOVD $0, err+24(FP) // errno RET // func rawSyscallNoError(trap, a1, a2, a3 uintptr) (r1, r2 uintptr) TEXT ·rawSyscallNoError(SB),NOSPLIT,$0-48 MOVD a1+8(FP), R2 MOVD a2+16(FP), R3 MOVD a3+24(FP), R4 MOVD $0, R5 MOVD $0, R6 MOVD $0, R7 MOVD trap+0(FP), R1 // syscall entry SYSCALL MOVD R2, r1+32(FP) MOVD R3, r2+40(FP) RET #define SYS_SOCKETCALL 102 /* from zsysnum_linux_s390x.go */ // func socketcall(call int, a0, a1, a2, a3, a4, a5 uintptr) (n int, err int) // Kernel interface gets call sub-number and pointer to a0. TEXT ·socketcall(SB),NOSPLIT,$0-72 BL runtime·entersyscall(SB) MOVD $SYS_SOCKETCALL, R1 // syscall entry MOVD call+0(FP), R2 // socket call number MOVD $a0+8(FP), R3 // pointer to call arguments MOVD $0, R4 MOVD $0, R5 MOVD $0, R6 MOVD $0, R7 SYSCALL MOVD $0xfffffffffffff001, R8 CMPUBLT R2, R8, oksock MOVD $-1, n+56(FP) NEG R2, R2 MOVD R2, err+64(FP) BL runtime·exitsyscall(SB) RET oksock: MOVD R2, n+56(FP) MOVD $0, err+64(FP) CALL runtime·exitsyscall(SB) RET // func rawsocketcall(call int, a0, a1, a2, a3, a4, a5 uintptr) (n int, err int) // Kernel interface gets call sub-number and pointer to a0. TEXT ·rawsocketcall(SB),NOSPLIT,$0-72 MOVD $SYS_SOCKETCALL, R1 // syscall entry MOVD call+0(FP), R2 // socket call number MOVD $a0+8(FP), R3 // pointer to call arguments MOVD $0, R4 MOVD $0, R5 MOVD $0, R6 MOVD $0, R7 SYSCALL MOVD $0xfffffffffffff001, R8 CMPUBLT R2, R8, oksock1 MOVD $-1, n+56(FP) NEG R2, R2 MOVD R2, err+64(FP) RET oksock1: MOVD R2, n+56(FP) MOVD $0, err+64(FP) RET