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https://github.com/golang/go
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8e91458b19
Convert the syscall package on openbsd/386 to use libc rather than performing direct system calls. Updates #36435 Change-Id: Ifcfbca0e6b933762596a564243caa850dac01442 Reviewed-on: https://go-review.googlesource.com/c/go/+/287654 Trust: Joel Sing <joel@sing.id.au> Run-TryBot: Joel Sing <joel@sing.id.au> Reviewed-by: Cherry Zhang <cherryyz@google.com>
115 lines
3.4 KiB
Go
115 lines
3.4 KiB
Go
// Copyright 2020 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 (openbsd && 386) || (openbsd && amd64) || (openbsd && arm64)
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// +build openbsd,386 openbsd,amd64 openbsd,arm64
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package runtime
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import "unsafe"
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// The X versions of syscall expect the libc call to return a 64-bit result.
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// Otherwise (the non-X version) expects a 32-bit result.
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// This distinction is required because an error is indicated by returning -1,
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// and we need to know whether to check 32 or 64 bits of the result.
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// (Some libc functions that return 32 bits put junk in the upper 32 bits of AX.)
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//go:linkname syscall_syscall syscall.syscall
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//go:nosplit
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//go:cgo_unsafe_args
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func syscall_syscall(fn, a1, a2, a3 uintptr) (r1, r2, err uintptr) {
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entersyscall()
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libcCall(unsafe.Pointer(funcPC(syscall)), unsafe.Pointer(&fn))
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exitsyscall()
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return
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}
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func syscall()
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//go:linkname syscall_syscallX syscall.syscallX
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//go:nosplit
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//go:cgo_unsafe_args
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func syscall_syscallX(fn, a1, a2, a3 uintptr) (r1, r2, err uintptr) {
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entersyscall()
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libcCall(unsafe.Pointer(funcPC(syscallX)), unsafe.Pointer(&fn))
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exitsyscall()
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return
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}
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func syscallX()
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//go:linkname syscall_syscall6 syscall.syscall6
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//go:nosplit
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//go:cgo_unsafe_args
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func syscall_syscall6(fn, a1, a2, a3, a4, a5, a6 uintptr) (r1, r2, err uintptr) {
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entersyscall()
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libcCall(unsafe.Pointer(funcPC(syscall6)), unsafe.Pointer(&fn))
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exitsyscall()
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return
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}
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func syscall6()
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//go:linkname syscall_syscall6X syscall.syscall6X
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//go:nosplit
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//go:cgo_unsafe_args
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func syscall_syscall6X(fn, a1, a2, a3, a4, a5, a6 uintptr) (r1, r2, err uintptr) {
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entersyscall()
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libcCall(unsafe.Pointer(funcPC(syscall6X)), unsafe.Pointer(&fn))
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exitsyscall()
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return
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}
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func syscall6X()
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//go:linkname syscall_syscall10 syscall.syscall10
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//go:nosplit
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//go:cgo_unsafe_args
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func syscall_syscall10(fn, a1, a2, a3, a4, a5, a6, a7, a8, a9, a10 uintptr) (r1, r2, err uintptr) {
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entersyscall()
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libcCall(unsafe.Pointer(funcPC(syscall10)), unsafe.Pointer(&fn))
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exitsyscall()
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return
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}
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func syscall10()
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//go:linkname syscall_syscall10X syscall.syscall10X
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//go:nosplit
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//go:cgo_unsafe_args
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func syscall_syscall10X(fn, a1, a2, a3, a4, a5, a6, a7, a8, a9, a10 uintptr) (r1, r2, err uintptr) {
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entersyscall()
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libcCall(unsafe.Pointer(funcPC(syscall10X)), unsafe.Pointer(&fn))
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exitsyscall()
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return
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}
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func syscall10X()
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//go:linkname syscall_rawSyscall syscall.rawSyscall
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//go:nosplit
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//go:cgo_unsafe_args
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func syscall_rawSyscall(fn, a1, a2, a3 uintptr) (r1, r2, err uintptr) {
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libcCall(unsafe.Pointer(funcPC(syscall)), unsafe.Pointer(&fn))
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return
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}
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//go:linkname syscall_rawSyscall6 syscall.rawSyscall6
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//go:nosplit
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//go:cgo_unsafe_args
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func syscall_rawSyscall6(fn, a1, a2, a3, a4, a5, a6 uintptr) (r1, r2, err uintptr) {
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libcCall(unsafe.Pointer(funcPC(syscall6)), unsafe.Pointer(&fn))
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return
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}
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//go:linkname syscall_rawSyscall6X syscall.rawSyscall6X
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//go:nosplit
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//go:cgo_unsafe_args
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func syscall_rawSyscall6X(fn, a1, a2, a3, a4, a5, a6 uintptr) (r1, r2, err uintptr) {
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libcCall(unsafe.Pointer(funcPC(syscall6X)), unsafe.Pointer(&fn))
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return
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}
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//go:linkname syscall_rawSyscall10X syscall.rawSyscall10X
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//go:nosplit
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//go:cgo_unsafe_args
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func syscall_rawSyscall10X(fn, a1, a2, a3, a4, a5, a6, a7, a8, a9, a10 uintptr) (r1, r2, err uintptr) {
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libcCall(unsafe.Pointer(funcPC(syscall10X)), unsafe.Pointer(&fn))
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return
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}
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