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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 rawVforkSyscall(trap, a1, a2, a3 uintptr) (r1, err uintptr)
TEXT ·rawVforkSyscall(SB),NOSPLIT|NOFRAME,$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 $0xfffffffffffff001, R8
CMPUBLT R2, R8, ok2
MOVD $-1, r1+32(FP)
NEG R2, R2
MOVD R2, err+40(FP) // errno
RET
ok2:
MOVD R2, r1+32(FP)
MOVD $0, err+40(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
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