asm_linux_mips64x.s

     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
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