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6c1b26c550
All loong64 syscalls return values only via R4/A0, and R5/A1 may contain unrelated content. Always zero the second return value. Change-Id: Ic889f33158c4e4999bd94bd768d1094e95bc6421 Reviewed-on: https://go-review.googlesource.com/c/sys/+/411634 Reviewed-by: Michael Knyszek <mknyszek@google.com> Reviewed-by: Austin Clements <austin@google.com> Reviewed-by: David Chase <drchase@google.com>
55 lines
1.2 KiB
ArmAsm
55 lines
1.2 KiB
ArmAsm
// Copyright 2022 The Go Authors. All rights reserved.
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// Use of this source code is governed by a BSD-style
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// license that can be found in the LICENSE file.
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//go:build linux && loong64 && gc
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// +build linux
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// +build loong64
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// +build gc
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#include "textflag.h"
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// Just jump to package syscall's implementation for all these functions.
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// The runtime may know about them.
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TEXT ·Syscall(SB),NOSPLIT,$0-56
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JMP syscall·Syscall(SB)
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TEXT ·Syscall6(SB),NOSPLIT,$0-80
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JMP syscall·Syscall6(SB)
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TEXT ·SyscallNoError(SB),NOSPLIT,$0-48
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JAL runtime·entersyscall(SB)
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MOVV a1+8(FP), R4
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MOVV a2+16(FP), R5
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MOVV a3+24(FP), R6
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MOVV R0, R7
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MOVV R0, R8
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MOVV R0, R9
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MOVV trap+0(FP), R11 // syscall entry
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SYSCALL
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MOVV R4, r1+32(FP)
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MOVV R0, r2+40(FP) // r2 is not used. Always set to 0
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JAL runtime·exitsyscall(SB)
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RET
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TEXT ·RawSyscall(SB),NOSPLIT,$0-56
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JMP syscall·RawSyscall(SB)
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TEXT ·RawSyscall6(SB),NOSPLIT,$0-80
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JMP syscall·RawSyscall6(SB)
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TEXT ·RawSyscallNoError(SB),NOSPLIT,$0-48
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MOVV a1+8(FP), R4
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MOVV a2+16(FP), R5
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MOVV a3+24(FP), R6
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MOVV R0, R7
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MOVV R0, R8
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MOVV R0, R9
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MOVV trap+0(FP), R11 // syscall entry
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SYSCALL
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MOVV R4, r1+32(FP)
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MOVV R0, r2+40(FP) // r2 is not used. Always set to 0
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RET
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