asm_linux_loong64.s raw

   1  // Copyright 2022 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  //
   8  // System calls for loong64, Linux
   9  //
  10  
  11  // func rawVforkSyscall(trap, a1, a2, a3 uintptr) (r1, err uintptr)
  12  TEXT ·rawVforkSyscall(SB),NOSPLIT,$0-48
  13  	MOVV	a1+8(FP), R4
  14  	MOVV	a2+16(FP), R5
  15  	MOVV	a3+24(FP), R6
  16  	MOVV	$0, R7
  17  	MOVV	$0, R8
  18  	MOVV	$0, R9
  19  	MOVV	trap+0(FP), R11	// syscall entry
  20  	SYSCALL
  21  	MOVW	$-4096, R12
  22  	BGEU	R12, R4, ok
  23  	MOVV	$-1, R12
  24  	MOVV	R12, r1+32(FP)	// r1
  25  	SUBVU	R4, R0, R4
  26  	MOVV	R4, err+40(FP)	// errno
  27  	RET
  28  ok:
  29  	MOVV	R4, 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), R11	// syscall entry
  41  	SYSCALL
  42  	MOVV	R4, r1+32(FP)
  43  	MOVV	R0, r2+40(FP)	// r2 is not used. Always set to 0.
  44  	RET
  45