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// Copyright 2017 syzkaller project authors. All rights reserved.
// Use of this source code is governed by Apache 2 LICENSE that can be found in the LICENSE file.
package host
import (
"github.com/google/syzkaller/pkg/osutil"
"github.com/google/syzkaller/prog"
)
func isSupported(c *prog.Syscall, target *prog.Target, sandbox string) (bool, string) {
switch c.CallName {
case "syz_usb_connect", "syz_usb_disconnect":
reason := checkUSBEmulation()
return reason == "", reason
default:
return true, ""
}
}
func init() {
checkFeature[FeatureCoverage] = unconditionallyEnabled
checkFeature[FeatureComparisons] = unconditionallyEnabled
checkFeature[FeatureUSBEmulation] = checkUSBEmulation
checkFeature[FeatureExtraCoverage] = checkUSBEmulation
checkFeature[FeatureDelayKcovMmap] = unconditionallyEnabled
checkFeature[FeatureFault] = checkFault
}
func checkUSBEmulation() string {
if err := osutil.IsAccessible("/dev/vhci0"); err != nil {
return err.Error()
}
return ""
}
func checkFault() string {
if err := osutil.IsAccessible("/dev/fault"); err != nil {
return err.Error()
}
return ""
}
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