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// Copyright 2014 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.
package runtime
import "unsafe"
type mts struct {
tv_sec int64
tv_nsec int64
}
type mscratch struct {
v [6]uintptr
}
type mOS struct {
waitsema uintptr // semaphore for parking on locks
perrno *int32 // pointer to tls errno
// these are here because they are too large to be on the stack
// of low-level NOSPLIT functions.
//LibCall libcall;
ts mts
scratch mscratch
}
type libcFunc uintptr
//go:linkname asmsysvicall6x runtime.asmsysvicall6
var asmsysvicall6x libcFunc // name to take addr of asmsysvicall6
func asmsysvicall6() // declared for vet; do NOT call
//go:nosplit
func sysvicall0(fn *libcFunc) uintptr {
// Leave caller's PC/SP around for traceback.
gp := getg()
var mp *m
if gp != nil {
mp = gp.m
}
if mp != nil && mp.libcallsp == 0 {
mp.libcallg.set(gp)
mp.libcallpc = getcallerpc()
// sp must be the last, because once async cpu profiler finds
// all three values to be non-zero, it will use them
mp.libcallsp = getcallersp()
} else {
mp = nil // See comment in sys_darwin.go:libcCall
}
var libcall libcall
libcall.fn = uintptr(unsafe.Pointer(fn))
libcall.n = 0
libcall.args = uintptr(unsafe.Pointer(fn)) // it's unused but must be non-nil, otherwise crashes
asmcgocall(unsafe.Pointer(&asmsysvicall6x), unsafe.Pointer(&libcall))
if mp != nil {
mp.libcallsp = 0
}
return libcall.r1
}
//go:nosplit
func sysvicall1(fn *libcFunc, a1 uintptr) uintptr {
r1, _ := sysvicall1Err(fn, a1)
return r1
}
// sysvicall1Err returns both the system call result and the errno value.
// This is used by sysvicall1 and pipe.
//
//go:nosplit
func sysvicall1Err(fn *libcFunc, a1 uintptr) (r1, err uintptr) {
// Leave caller's PC/SP around for traceback.
gp := getg()
var mp *m
if gp != nil {
mp = gp.m
}
if mp != nil && mp.libcallsp == 0 {
mp.libcallg.set(gp)
mp.libcallpc = getcallerpc()
// sp must be the last, because once async cpu profiler finds
// all three values to be non-zero, it will use them
mp.libcallsp = getcallersp()
} else {
mp = nil
}
var libcall libcall
libcall.fn = uintptr(unsafe.Pointer(fn))
libcall.n = 1
// TODO(rsc): Why is noescape necessary here and below?
libcall.args = uintptr(noescape(unsafe.Pointer(&a1)))
asmcgocall(unsafe.Pointer(&asmsysvicall6x), unsafe.Pointer(&libcall))
if mp != nil {
mp.libcallsp = 0
}
return libcall.r1, libcall.err
}
//go:nosplit
func sysvicall2(fn *libcFunc, a1, a2 uintptr) uintptr {
r1, _ := sysvicall2Err(fn, a1, a2)
return r1
}
//go:nosplit
//go:cgo_unsafe_args
// sysvicall2Err returns both the system call result and the errno value.
// This is used by sysvicall2 and pipe2.
func sysvicall2Err(fn *libcFunc, a1, a2 uintptr) (uintptr, uintptr) {
// Leave caller's PC/SP around for traceback.
gp := getg()
var mp *m
if gp != nil {
mp = gp.m
}
if mp != nil && mp.libcallsp == 0 {
mp.libcallg.set(gp)
mp.libcallpc = getcallerpc()
// sp must be the last, because once async cpu profiler finds
// all three values to be non-zero, it will use them
mp.libcallsp = getcallersp()
} else {
mp = nil
}
var libcall libcall
libcall.fn = uintptr(unsafe.Pointer(fn))
libcall.n = 2
libcall.args = uintptr(noescape(unsafe.Pointer(&a1)))
asmcgocall(unsafe.Pointer(&asmsysvicall6x), unsafe.Pointer(&libcall))
if mp != nil {
mp.libcallsp = 0
}
return libcall.r1, libcall.err
}
//go:nosplit
func sysvicall3(fn *libcFunc, a1, a2, a3 uintptr) uintptr {
r1, _ := sysvicall3Err(fn, a1, a2, a3)
return r1
}
//go:nosplit
//go:cgo_unsafe_args
// sysvicall3Err returns both the system call result and the errno value.
// This is used by sysvicall3 and write1.
func sysvicall3Err(fn *libcFunc, a1, a2, a3 uintptr) (r1, err uintptr) {
// Leave caller's PC/SP around for traceback.
gp := getg()
var mp *m
if gp != nil {
mp = gp.m
}
if mp != nil && mp.libcallsp == 0 {
mp.libcallg.set(gp)
mp.libcallpc = getcallerpc()
// sp must be the last, because once async cpu profiler finds
// all three values to be non-zero, it will use them
mp.libcallsp = getcallersp()
} else {
mp = nil
}
var libcall libcall
libcall.fn = uintptr(unsafe.Pointer(fn))
libcall.n = 3
libcall.args = uintptr(noescape(unsafe.Pointer(&a1)))
asmcgocall(unsafe.Pointer(&asmsysvicall6x), unsafe.Pointer(&libcall))
if mp != nil {
mp.libcallsp = 0
}
return libcall.r1, libcall.err
}
//go:nosplit
//go:cgo_unsafe_args
func sysvicall4(fn *libcFunc, a1, a2, a3, a4 uintptr) uintptr {
// Leave caller's PC/SP around for traceback.
gp := getg()
var mp *m
if gp != nil {
mp = gp.m
}
if mp != nil && mp.libcallsp == 0 {
mp.libcallg.set(gp)
mp.libcallpc = getcallerpc()
// sp must be the last, because once async cpu profiler finds
// all three values to be non-zero, it will use them
mp.libcallsp = getcallersp()
} else {
mp = nil
}
var libcall libcall
libcall.fn = uintptr(unsafe.Pointer(fn))
libcall.n = 4
libcall.args = uintptr(noescape(unsafe.Pointer(&a1)))
asmcgocall(unsafe.Pointer(&asmsysvicall6x), unsafe.Pointer(&libcall))
if mp != nil {
mp.libcallsp = 0
}
return libcall.r1
}
//go:nosplit
//go:cgo_unsafe_args
func sysvicall5(fn *libcFunc, a1, a2, a3, a4, a5 uintptr) uintptr {
// Leave caller's PC/SP around for traceback.
gp := getg()
var mp *m
if gp != nil {
mp = gp.m
}
if mp != nil && mp.libcallsp == 0 {
mp.libcallg.set(gp)
mp.libcallpc = getcallerpc()
// sp must be the last, because once async cpu profiler finds
// all three values to be non-zero, it will use them
mp.libcallsp = getcallersp()
} else {
mp = nil
}
var libcall libcall
libcall.fn = uintptr(unsafe.Pointer(fn))
libcall.n = 5
libcall.args = uintptr(noescape(unsafe.Pointer(&a1)))
asmcgocall(unsafe.Pointer(&asmsysvicall6x), unsafe.Pointer(&libcall))
if mp != nil {
mp.libcallsp = 0
}
return libcall.r1
}
//go:nosplit
//go:cgo_unsafe_args
func sysvicall6(fn *libcFunc, a1, a2, a3, a4, a5, a6 uintptr) uintptr {
// Leave caller's PC/SP around for traceback.
gp := getg()
var mp *m
if gp != nil {
mp = gp.m
}
if mp != nil && mp.libcallsp == 0 {
mp.libcallg.set(gp)
mp.libcallpc = getcallerpc()
// sp must be the last, because once async cpu profiler finds
// all three values to be non-zero, it will use them
mp.libcallsp = getcallersp()
} else {
mp = nil
}
var libcall libcall
libcall.fn = uintptr(unsafe.Pointer(fn))
libcall.n = 6
libcall.args = uintptr(noescape(unsafe.Pointer(&a1)))
asmcgocall(unsafe.Pointer(&asmsysvicall6x), unsafe.Pointer(&libcall))
if mp != nil {
mp.libcallsp = 0
}
return libcall.r1
}
func issetugid() int32 {
return int32(sysvicall0(&libc_issetugid))
}