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| // 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.
|
| #include "textflag.h"
| #include "funcdata.h"
|
| //
| // System calls for AMD64, Linux
| //
|
| // func Syscall(trap int64, a1, a2, a3 uintptr) (r1, r2, err uintptr);
| // Trap # in AX, args in DI SI DX R10 R8 R9, return in AX DX
| // Note that this differs from "standard" ABI convention, which
| // would pass 4th arg in CX, not R10.
|
| TEXT ·Syscall(SB),NOSPLIT,$0-56
| CALL runtime·entersyscall(SB)
| MOVQ a1+8(FP), DI
| MOVQ a2+16(FP), SI
| MOVQ a3+24(FP), DX
| MOVQ $0, R10
| MOVQ $0, R8
| MOVQ $0, R9
| MOVQ trap+0(FP), AX // syscall entry
| SYSCALL
| CMPQ AX, $0xfffffffffffff001
| JLS ok
| MOVQ $-1, r1+32(FP)
| MOVQ $0, r2+40(FP)
| NEGQ AX
| MOVQ AX, err+48(FP)
| CALL runtime·exitsyscall(SB)
| RET
| ok:
| MOVQ AX, r1+32(FP)
| MOVQ DX, r2+40(FP)
| MOVQ $0, err+48(FP)
| CALL runtime·exitsyscall(SB)
| RET
|
| // func Syscall6(trap, a1, a2, a3, a4, a5, a6 uintptr) (r1, r2, err uintptr)
| TEXT ·Syscall6(SB),NOSPLIT,$0-80
| CALL runtime·entersyscall(SB)
| 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
| CMPQ AX, $0xfffffffffffff001
| JLS ok6
| MOVQ $-1, r1+56(FP)
| MOVQ $0, r2+64(FP)
| NEGQ AX
| MOVQ AX, err+72(FP)
| CALL runtime·exitsyscall(SB)
| RET
| ok6:
| MOVQ AX, r1+56(FP)
| MOVQ DX, r2+64(FP)
| MOVQ $0, err+72(FP)
| CALL runtime·exitsyscall(SB)
| RET
|
| // func RawSyscall(trap, a1, a2, a3 uintptr) (r1, r2, err uintptr)
| TEXT ·RawSyscall(SB),NOSPLIT,$0-56
| MOVQ a1+8(FP), DI
| MOVQ a2+16(FP), SI
| MOVQ a3+24(FP), DX
| MOVQ $0, R10
| MOVQ $0, R8
| MOVQ $0, R9
| MOVQ trap+0(FP), AX // syscall entry
| SYSCALL
| CMPQ AX, $0xfffffffffffff001
| JLS ok1
| MOVQ $-1, r1+32(FP)
| MOVQ $0, r2+40(FP)
| NEGQ AX
| MOVQ AX, err+48(FP)
| RET
| ok1:
| MOVQ AX, r1+32(FP)
| MOVQ DX, r2+40(FP)
| MOVQ $0, err+48(FP)
| RET
|
| // func RawSyscall6(trap, a1, a2, a3, a4, a5, a6 uintptr) (r1, r2, err uintptr)
| TEXT ·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
| CMPQ AX, $0xfffffffffffff001
| JLS ok2
| MOVQ $-1, r1+56(FP)
| MOVQ $0, r2+64(FP)
| NEGQ AX
| MOVQ AX, err+72(FP)
| RET
| ok2:
| MOVQ AX, r1+56(FP)
| MOVQ DX, r2+64(FP)
| MOVQ $0, err+72(FP)
| RET
|
| // func rawVforkSyscall(trap, a1 uintptr) (r1, err uintptr)
| TEXT ·rawVforkSyscall(SB),NOSPLIT,$0-32
| MOVQ a1+8(FP), DI
| MOVQ $0, SI
| MOVQ $0, DX
| MOVQ $0, R10
| MOVQ $0, R8
| MOVQ $0, R9
| MOVQ trap+0(FP), AX // syscall entry
| POPQ R12 // preserve return address
| SYSCALL
| PUSHQ R12
| CMPQ AX, $0xfffffffffffff001
| JLS ok2
| MOVQ $-1, r1+16(FP)
| NEGQ AX
| MOVQ AX, err+24(FP)
| RET
| ok2:
| MOVQ AX, r1+16(FP)
| MOVQ $0, err+24(FP)
| RET
|
| // func rawSyscallNoError(trap, a1, a2, a3 uintptr) (r1, r2 uintptr)
| TEXT ·rawSyscallNoError(SB),NOSPLIT,$0-48
| MOVQ a1+8(FP), DI
| MOVQ a2+16(FP), SI
| MOVQ a3+24(FP), DX
| MOVQ $0, R10
| MOVQ $0, R8
| MOVQ $0, R9
| MOVQ trap+0(FP), AX // syscall entry
| SYSCALL
| MOVQ AX, r1+32(FP)
| MOVQ DX, r2+40(FP)
| RET
|
| // func gettimeofday(tv *Timeval) (err uintptr)
| TEXT ·gettimeofday(SB),NOSPLIT,$0-16
| MOVQ tv+0(FP), DI
| MOVQ $0, SI
| MOVQ runtime·vdsoGettimeofdaySym(SB), AX
| CALL AX
|
| CMPQ AX, $0xfffffffffffff001
| JLS ok7
| NEGQ AX
| MOVQ AX, err+8(FP)
| RET
| ok7:
| MOVQ $0, err+8(FP)
| RET
|
|
