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 libcFunc uintptr 10 11 var asmsysvicall6 libcFunc 12 13 //go:noescape 14 func sigfwd(fn uintptr, sig uint32, info *siginfo, ctx unsafe.Pointer) 15 16 //go:nosplit 17 func sysvicall0(fn *libcFunc) uintptr { 18 libcall := &getg().m.libcall 19 libcall.fn = uintptr(unsafe.Pointer(fn)) 20 libcall.n = 0 21 libcall.args = uintptr(unsafe.Pointer(fn)) // it's unused but must be non-nil, otherwise crashes 22 asmcgocall(unsafe.Pointer(&asmsysvicall6), unsafe.Pointer(libcall)) 23 return libcall.r1 24 } 25 26 //go:nosplit 27 func sysvicall1(fn *libcFunc, a1 uintptr) uintptr { 28 libcall := &getg().m.libcall 29 libcall.fn = uintptr(unsafe.Pointer(fn)) 30 libcall.n = 1 31 // TODO(rsc): Why is noescape necessary here and below? 32 libcall.args = uintptr(noescape(unsafe.Pointer(&a1))) 33 asmcgocall(unsafe.Pointer(&asmsysvicall6), unsafe.Pointer(libcall)) 34 return libcall.r1 35 } 36 37 //go:nosplit 38 func sysvicall2(fn *libcFunc, a1, a2 uintptr) uintptr { 39 libcall := &getg().m.libcall 40 libcall.fn = uintptr(unsafe.Pointer(fn)) 41 libcall.n = 2 42 libcall.args = uintptr(noescape(unsafe.Pointer(&a1))) 43 asmcgocall(unsafe.Pointer(&asmsysvicall6), unsafe.Pointer(libcall)) 44 return libcall.r1 45 } 46 47 //go:nosplit 48 func sysvicall3(fn *libcFunc, a1, a2, a3 uintptr) uintptr { 49 libcall := &getg().m.libcall 50 libcall.fn = uintptr(unsafe.Pointer(fn)) 51 libcall.n = 3 52 libcall.args = uintptr(noescape(unsafe.Pointer(&a1))) 53 asmcgocall(unsafe.Pointer(&asmsysvicall6), unsafe.Pointer(libcall)) 54 return libcall.r1 55 } 56 57 //go:nosplit 58 func sysvicall4(fn *libcFunc, a1, a2, a3, a4 uintptr) uintptr { 59 libcall := &getg().m.libcall 60 libcall.fn = uintptr(unsafe.Pointer(fn)) 61 libcall.n = 4 62 libcall.args = uintptr(noescape(unsafe.Pointer(&a1))) 63 asmcgocall(unsafe.Pointer(&asmsysvicall6), unsafe.Pointer(libcall)) 64 return libcall.r1 65 } 66 67 //go:nosplit 68 func sysvicall5(fn *libcFunc, a1, a2, a3, a4, a5 uintptr) uintptr { 69 libcall := &getg().m.libcall 70 libcall.fn = uintptr(unsafe.Pointer(fn)) 71 libcall.n = 5 72 libcall.args = uintptr(noescape(unsafe.Pointer(&a1))) 73 asmcgocall(unsafe.Pointer(&asmsysvicall6), unsafe.Pointer(libcall)) 74 return libcall.r1 75 } 76 77 //go:nosplit 78 func sysvicall6(fn *libcFunc, a1, a2, a3, a4, a5, a6 uintptr) uintptr { 79 libcall := &getg().m.libcall 80 libcall.fn = uintptr(unsafe.Pointer(fn)) 81 libcall.n = 6 82 libcall.args = uintptr(noescape(unsafe.Pointer(&a1))) 83 asmcgocall(unsafe.Pointer(&asmsysvicall6), unsafe.Pointer(libcall)) 84 return libcall.r1 85 } 86
