1 // Copyright 2013 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 // +build amd64 amd64p32 386 6 7 package runtime 8 9 import ( 10 "runtime/internal/sys" 11 "unsafe" 12 ) 13 14 // adjust Gobuf as if it executed a call to fn with context ctxt 15 // and then did an immediate gosave. 16 func gostartcall(buf *gobuf, fn, ctxt unsafe.Pointer) { 17 sp := buf.sp 18 if sys.RegSize > sys.PtrSize { 19 sp -= sys.PtrSize 20 *(*uintptr)(unsafe.Pointer(sp)) = 0 21 } 22 sp -= sys.PtrSize 23 *(*uintptr)(unsafe.Pointer(sp)) = buf.pc 24 buf.sp = sp 25 buf.pc = uintptr(fn) 26 buf.ctxt = ctxt 27 } 28
