asm_linux_mips64x.s

Documentation: syscall

     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)
    14TEXT ·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
    28ok:
    29	MOVV	R2, r1+32(FP)	// r1
    30	MOVV	R0, err+40(FP)	// errno
    31	RET
    32
    33TEXT ·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
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