sys_riscv64.go

     1  // Copyright 2016 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 (
     8  	"unsafe"
     9  
    10  	"internal/abi"
    11  	"internal/runtime/sys"
    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  	if buf.lr != 0 {
    18  		throw("invalid use of gostartcall")
    19  	}
    20  	// Use double the PC quantum on riscv64, so that we retain
    21  	// four byte alignment and use non-compressed instructions.
    22  	buf.lr = abi.FuncPCABI0(goexit) + sys.PCQuantum*2
    23  	buf.pc = uintptr(fn)
    24  	buf.ctxt = ctxt
    25  }
    26
View as plain text