1 // Copyright 2019 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 // +build riscv64,!gccgo

     6 

     7 #include "textflag.h"

     8 

     9 //

    10 // System calls for linux/riscv64.

    11 //

    12 // Where available, just jump to package syscall's implementation of

    13 // these functions.

    14 

    15 TEXT ·Syscall(SB),NOSPLIT,$0-56

    16 	JMP	syscall·Syscall(SB)

    17 

    18 TEXT ·Syscall6(SB),NOSPLIT,$0-80

    19 	JMP	syscall·Syscall6(SB)

    20 

    21 TEXT ·SyscallNoError(SB),NOSPLIT,$0-48

    22 	CALL	runtime·entersyscall(SB)

    23 	MOV	a1+8(FP), A0

    24 	MOV	a2+16(FP), A1

    25 	MOV	a3+24(FP), A2

    26 	MOV	trap+0(FP), A7	// syscall entry

    27 	ECALL

    28 	MOV	A0, r1+32(FP)	// r1

    29 	MOV	A1, r2+40(FP)	// r2

    30 	CALL	runtime·exitsyscall(SB)

    31 	RET

    32 

    33 TEXT ·RawSyscall(SB),NOSPLIT,$0-56

    34 	JMP	syscall·RawSyscall(SB)

    35 

    36 TEXT ·RawSyscall6(SB),NOSPLIT,$0-80

    37 	JMP	syscall·RawSyscall6(SB)

    38 

    39 TEXT ·RawSyscallNoError(SB),NOSPLIT,$0-48

    40 	MOV	a1+8(FP), A0

    41 	MOV	a2+16(FP), A1

    42 	MOV	a3+24(FP), A2

    43 	MOV	trap+0(FP), A7	// syscall entry

    44 	ECALL

    45 	MOV	A0, r1+32(FP)

    46 	MOV	A1, r2+40(FP)

    47 	RET