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// Copyright 2011 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 objabi
// For the linkers. Must match Go definitions.
const (
STACKSYSTEM = 0
StackSystem = STACKSYSTEM
StackBig = 4096
StackSmall = 128
)
const (
StackPreempt = -1314 // 0xfff...fade
)
// Initialize StackGuard and StackLimit according to target system.
var StackGuard = 928*stackGuardMultiplier() + StackSystem
var StackLimit = StackGuard - StackSystem - StackSmall
// stackGuardMultiplier returns a multiplier to apply to the default
// stack guard size. Larger multipliers are used for non-optimized
// builds that have larger stack frames or for specific targets.
func stackGuardMultiplier() int {
// On AIX, a larger stack is needed for syscalls.
if GOOS == "aix" {
return 2
}
return stackGuardMultiplierDefault
}
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