asm_linux_arm64.s

Documentation: syscall

     1// Copyright 2015 The Go Authors. All rights reserved.
     2// Use of this source code is governed by a BSD-style
     3// license that can be found in the LICENSE file.
     4
     5#include "textflag.h"
     6
     7// func rawVforkSyscall(trap, a1, a2, a3 uintptr) (r1, err uintptr)
     8TEXT ·rawVforkSyscall(SB),NOSPLIT,$0-48
     9	MOVD	a1+8(FP), R0
    10	MOVD	a2+16(FP), R1
    11	MOVD	a3+24(FP), R2
    12	MOVD	$0, R3
    13	MOVD	$0, R4
    14	MOVD	$0, R5
    15	MOVD	trap+0(FP), R8	// syscall entry
    16	SVC
    17	CMN	$4095, R0
    18	BCC	ok
    19	MOVD	$-1, R4
    20	MOVD	R4, r1+32(FP)	// r1
    21	NEG	R0, R0
    22	MOVD	R0, err+40(FP)	// errno
    23	RET
    24ok:
    25	MOVD	R0, r1+32(FP)	// r1
    26	MOVD	ZR, err+40(FP)	// errno
    27	RET
    28
    29// func rawSyscallNoError(trap uintptr, a1, a2, a3 uintptr) (r1, r2 uintptr);
    30TEXT ·rawSyscallNoError(SB),NOSPLIT,$0-48
    31	MOVD	a1+8(FP), R0
    32	MOVD	a2+16(FP), R1
    33	MOVD	a3+24(FP), R2
    34	MOVD	$0, R3
    35	MOVD	$0, R4
    36	MOVD	$0, R5
    37	MOVD	trap+0(FP), R8	// syscall entry
    38	SVC
    39	MOVD	R0, r1+32(FP)
    40	MOVD	R1, r2+40(FP)
    41	RET
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