gsrlabs/sys
1
0
Fork 0
mirror of https://github.com/golang/sys.git synced 2026-01-29 07:02:06 +03:00
Code Issues Packages Projects Releases Wiki Activity

[release-branch.go1.14-cmd] unix: provide linux/riscv64 assembly for syscalls

Browse Source 
While the linux/riscv64 port is not yet upstream, most of the syscalls package
already has linux/riscv64 support and this will make testing and development
easier.

Updates golang/go#27532

Change-Id: I6e505be55fdbb2942fb6e4f34c040e7b82809630
Reviewed-on: https://go-review.googlesource.com/c/sys/+/177799
Reviewed-by: Brad Fitzpatrick <bradfitz@golang.org>
(cherry picked from commit 4c3a928424)
Reviewed-on: https://go-review.googlesource.com/c/sys/+/217300
Run-TryBot: Filippo Valsorda <filippo@golang.org>
Reviewed-by: Ian Lance Taylor <iant@golang.org>
This commit is contained in:
Joel Sing
2019-05-18 18:17:00 +10:00
committed by Filippo Valsorda
parent a43fa875dd
commit 9e5cf931a0
1 changed files with 54 additions and 0 deletions
Download Patch File Download Diff File Expand all files Collapse all files

54
unix/asm_linux_riscv64.s Normal file
View File

@@ -0,0 +1,54 @@
// Copyright 2019 The Go Authors. All rights reserved.
// Use of this source code is governed by a BSD-style
// license that can be found in the LICENSE file.
// +build riscv64,!gccgo
#include "textflag.h"
//
// System calls for linux/riscv64.
//
// Where available, just jump to package syscall's implementation of
// these functions.
TEXT ·Syscall(SB),NOSPLIT,$0-56
JMP syscall·Syscall(SB)
TEXT ·Syscall6(SB),NOSPLIT,$0-80
JMP syscall·Syscall6(SB)
TEXT ·SyscallNoError(SB),NOSPLIT,$0-48
CALL runtime·entersyscall(SB)
MOV a1+8(FP), A0
MOV a2+16(FP), A1
MOV a3+24(FP), A2
MOV $0, A3
MOV $0, A4
MOV $0, A5
MOV $0, A6
MOV trap+0(FP), A7 // syscall entry
ECALL
MOV A0, r1+32(FP) // r1
MOV A1, r2+40(FP) // r2
CALL runtime·exitsyscall(SB)
RET
TEXT ·RawSyscall(SB),NOSPLIT,$0-56
JMP syscall·RawSyscall(SB)
TEXT ·RawSyscall6(SB),NOSPLIT,$0-80
JMP syscall·RawSyscall6(SB)
TEXT ·RawSyscallNoError(SB),NOSPLIT,$0-48
MOV a1+8(FP), A0
MOV a2+16(FP), A1
MOV a3+24(FP), A2
MOV ZERO, A3
MOV ZERO, A4
MOV ZERO, A5
MOV trap+0(FP), A7 // syscall entry
ECALL
MOV A0, r1+32(FP)
MOV A1, r2+40(FP)
RET