1 // Copyright 2014 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 package runtime 6 7 import "unsafe" 8 9 type mts struct { 10 tv_sec int64 11 tv_nsec int64 12 } 13 14 type mscratch struct { 15 v [6]uintptr 16 } 17 18 type mOS struct { 19 waitsema uintptr // semaphore for parking on locks 20 perrno *int32 // pointer to tls errno 21 // these are here because they are too large to be on the stack 22 // of low-level NOSPLIT functions. 23 //LibCall libcall; 24 ts mts 25 scratch mscratch 26 } 27 28 type libcFunc uintptr 29 30 var asmsysvicall6 libcFunc 31 32 //go:nosplit 33 func sysvicall0(fn *libcFunc) uintptr { 34 var libcall libcall 35 libcall.fn = uintptr(unsafe.Pointer(fn)) 36 libcall.n = 0 37 libcall.args = uintptr(unsafe.Pointer(fn)) // it's unused but must be non-nil, otherwise crashes 38 asmcgocall(unsafe.Pointer(&asmsysvicall6), unsafe.Pointer(&libcall)) 39 return libcall.r1 40 } 41 42 //go:nosplit 43 func sysvicall1(fn *libcFunc, a1 uintptr) uintptr { 44 var libcall libcall 45 libcall.fn = uintptr(unsafe.Pointer(fn)) 46 libcall.n = 1 47 // TODO(rsc): Why is noescape necessary here and below? 48 libcall.args = uintptr(noescape(unsafe.Pointer(&a1))) 49 asmcgocall(unsafe.Pointer(&asmsysvicall6), unsafe.Pointer(&libcall)) 50 return libcall.r1 51 } 52 53 //go:nosplit 54 func sysvicall2(fn *libcFunc, a1, a2 uintptr) uintptr { 55 var libcall libcall 56 libcall.fn = uintptr(unsafe.Pointer(fn)) 57 libcall.n = 2 58 libcall.args = uintptr(noescape(unsafe.Pointer(&a1))) 59 asmcgocall(unsafe.Pointer(&asmsysvicall6), unsafe.Pointer(&libcall)) 60 return libcall.r1 61 } 62 63 //go:nosplit 64 func sysvicall3(fn *libcFunc, a1, a2, a3 uintptr) uintptr { 65 var libcall libcall 66 libcall.fn = uintptr(unsafe.Pointer(fn)) 67 libcall.n = 3 68 libcall.args = uintptr(noescape(unsafe.Pointer(&a1))) 69 asmcgocall(unsafe.Pointer(&asmsysvicall6), unsafe.Pointer(&libcall)) 70 return libcall.r1 71 } 72 73 //go:nosplit 74 func sysvicall4(fn *libcFunc, a1, a2, a3, a4 uintptr) uintptr { 75 var libcall libcall 76 libcall.fn = uintptr(unsafe.Pointer(fn)) 77 libcall.n = 4 78 libcall.args = uintptr(noescape(unsafe.Pointer(&a1))) 79 asmcgocall(unsafe.Pointer(&asmsysvicall6), unsafe.Pointer(&libcall)) 80 return libcall.r1 81 } 82 83 //go:nosplit 84 func sysvicall5(fn *libcFunc, a1, a2, a3, a4, a5 uintptr) uintptr { 85 var libcall libcall 86 libcall.fn = uintptr(unsafe.Pointer(fn)) 87 libcall.n = 5 88 libcall.args = uintptr(noescape(unsafe.Pointer(&a1))) 89 asmcgocall(unsafe.Pointer(&asmsysvicall6), unsafe.Pointer(&libcall)) 90 return libcall.r1 91 } 92 93 //go:nosplit 94 func sysvicall6(fn *libcFunc, a1, a2, a3, a4, a5, a6 uintptr) uintptr { 95 var libcall libcall 96 libcall.fn = uintptr(unsafe.Pointer(fn)) 97 libcall.n = 6 98 libcall.args = uintptr(noescape(unsafe.Pointer(&a1))) 99 asmcgocall(unsafe.Pointer(&asmsysvicall6), unsafe.Pointer(&libcall)) 100 return libcall.r1 101 } 102
