asm_linux_arm64.s raw

   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)
   8  TEXT ·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
  24  ok:
  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);
  30  TEXT ·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
  42