asm_linux_mips64x.s raw

   1  // Copyright 2014 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  //go:build linux && (mips64 || mips64le)
   6  
   7  #include "textflag.h"
   8  
   9  //
  10  // System calls for mips64, Linux
  11  //
  12  
  13  // func rawVforkSyscall(trap, a1, a2, a3 uintptr) (r1, err uintptr)
  14  TEXT ·rawVforkSyscall(SB),NOSPLIT|NOFRAME,$0-48
  15  	MOVV	a1+8(FP), R4
  16  	MOVV	a2+16(FP), R5
  17  	MOVV	a3+24(FP), R6
  18  	MOVV	R0, R7
  19  	MOVV	R0, R8
  20  	MOVV	R0, R9
  21  	MOVV	trap+0(FP), R2	// syscall entry
  22  	SYSCALL
  23  	BEQ	R7, ok
  24  	MOVV	$-1, R1
  25  	MOVV	R1, r1+32(FP)	// r1
  26  	MOVV	R2, err+40(FP)	// errno
  27  	RET
  28  ok:
  29  	MOVV	R2, r1+32(FP)	// r1
  30  	MOVV	R0, err+40(FP)	// errno
  31  	RET
  32  
  33  TEXT ·rawSyscallNoError(SB),NOSPLIT,$0-48
  34  	MOVV	a1+8(FP), R4
  35  	MOVV	a2+16(FP), R5
  36  	MOVV	a3+24(FP), R6
  37  	MOVV	R0, R7
  38  	MOVV	R0, R8
  39  	MOVV	R0, R9
  40  	MOVV	trap+0(FP), R2	// syscall entry
  41  	MOVV	R0, R3	// reset R3 to zero as 1-ret SYSCALL keeps it
  42  	SYSCALL
  43  	MOVV	R2, r1+32(FP)	// r1
  44  	MOVV	R3, r2+40(FP)	// r2
  45  	RET
  46