File size: 2,203 Bytes
04dc9f2 | 1 2 3 4 5 6 7 8 9 10 11 12 13 14 15 16 17 18 19 20 21 22 23 24 25 26 27 28 29 30 31 32 33 34 35 36 37 38 39 40 41 42 43 44 45 46 47 48 49 50 51 52 53 54 55 56 57 58 59 60 61 62 63 64 65 66 67 68 69 70 71 72 73 74 75 76 77 78 79 80 81 82 83 84 85 86 87 88 89 90 91 92 93 94 | // 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 路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 路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 路socketcall(SB),NOSPLIT,$0-72
BL runtime路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路exitsyscall(SB)
RET
oksock:
MOVD R2, n+56(FP)
MOVD $0, err+64(FP)
CALL runtime路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 路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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