File size: 2,202 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 95 96 97 | // Copyright 2009 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.
//go:build dragonfly || freebsd || netbsd
#include "textflag.h"
#include "funcdata.h"
//
// System call support for AMD64 unixes
//
// func Syscall(trap int64, a1, a2, a3 int64) (r1, r2, err int64)
// func Syscall6(trap int64, a1, a2, a3, a4, a5, a6 int64) (r1, r2, err int64)
// Trap # in AX, args in DI SI DX, return in AX DX
TEXT 路Syscall(SB),NOSPLIT,$0-56
CALL runtime路entersyscall<ABIInternal>(SB)
MOVQ trap+0(FP), AX // syscall entry
MOVQ a1+8(FP), DI
MOVQ a2+16(FP), SI
MOVQ a3+24(FP), DX
SYSCALL
JCC ok
MOVQ $-1, r1+32(FP) // r1
MOVQ $0, r2+40(FP) // r2
MOVQ AX, err+48(FP) // errno
CALL runtime路exitsyscall<ABIInternal>(SB)
RET
ok:
MOVQ AX, r1+32(FP) // r1
MOVQ DX, r2+40(FP) // r2
MOVQ $0, err+48(FP) // errno
CALL runtime路exitsyscall<ABIInternal>(SB)
RET
TEXT 路Syscall6(SB),NOSPLIT,$0-80
CALL runtime路entersyscall<ABIInternal>(SB)
MOVQ trap+0(FP), AX // syscall entry
MOVQ a1+8(FP), DI
MOVQ a2+16(FP), SI
MOVQ a3+24(FP), DX
MOVQ a4+32(FP), R10
MOVQ a5+40(FP), R8
MOVQ a6+48(FP), R9
SYSCALL
JCC ok6
MOVQ $-1, r1+56(FP) // r1
MOVQ $0, r2+64(FP) // r2
MOVQ AX, err+72(FP) // errno
CALL runtime路exitsyscall<ABIInternal>(SB)
RET
ok6:
MOVQ AX, r1+56(FP) // r1
MOVQ DX, r2+64(FP) // r2
MOVQ $0, err+72(FP) // errno
CALL runtime路exitsyscall<ABIInternal>(SB)
RET
TEXT 路RawSyscall(SB),NOSPLIT,$0-56
MOVQ a1+8(FP), DI
MOVQ a2+16(FP), SI
MOVQ a3+24(FP), DX
MOVQ trap+0(FP), AX // syscall entry
SYSCALL
JCC ok1
MOVQ $-1, r1+32(FP) // r1
MOVQ $0, r2+40(FP) // r2
MOVQ AX, err+48(FP) // errno
RET
ok1:
MOVQ AX, r1+32(FP) // r1
MOVQ DX, r2+40(FP) // r2
MOVQ $0, err+48(FP) // errno
RET
TEXT 路RawSyscall6(SB),NOSPLIT,$0-80
MOVQ a1+8(FP), DI
MOVQ a2+16(FP), SI
MOVQ a3+24(FP), DX
MOVQ a4+32(FP), R10
MOVQ a5+40(FP), R8
MOVQ a6+48(FP), R9
MOVQ trap+0(FP), AX // syscall entry
SYSCALL
JCC ok2
MOVQ $-1, r1+56(FP) // r1
MOVQ $0, r2+64(FP) // r2
MOVQ AX, err+72(FP) // errno
RET
ok2:
MOVQ AX, r1+56(FP) // r1
MOVQ DX, r2+64(FP) // r2
MOVQ $0, err+72(FP) // errno
RET
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