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// Copyright 2019 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 build
import (
"fmt"
"path/filepath"
"strconv"
"strings"
"time"
"github.com/google/syzkaller/pkg/osutil"
)
type freebsd struct{}
func (ctx freebsd) build(params Params) (ImageDetails, error) {
confDir := fmt.Sprintf("%v/sys/%v/conf/", params.KernelDir, params.TargetArch)
confFile := "SYZKALLER"
config := params.Config
if config == nil {
config = []byte(`
include "./GENERIC"
ident SYZKALLER
options COVERAGE
options KCOV
options KASAN
options TCPHPTS
options RATELIMIT
options DEBUG_VFS_LOCKS
options DIAGNOSTIC
`)
}
if err := osutil.WriteFile(filepath.Join(confDir, confFile), config); err != nil {
return ImageDetails{}, err
}
if _, err := osutil.RunCmd(10*time.Minute, params.KernelDir, "rm", "-rf", "obj"); err != nil {
return ImageDetails{}, err
}
objPrefix := filepath.Join(params.KernelDir, "obj")
output, err := ctx.make(params.KernelDir, objPrefix, params.BuildCPUs, "kernel-toolchain")
if err != nil {
return ImageDetails{}, err
}
if _, err := ctx.make(params.KernelDir, objPrefix, params.BuildCPUs, "buildkernel",
"WITH_EXTRA_TCP_STACKS=", fmt.Sprintf("KERNCONF=%v", confFile)); err != nil {
// The kernel-toolchain make target has to be built separately
// because FreeBSD's build doesn't correctly order the two
// targets. Its output is useful for debugging though, so
// include it here.
return ImageDetails{}, fmt.Errorf("%s: %w", string(output), err)
}
kernelObjDir := filepath.Join(objPrefix, params.KernelDir,
fmt.Sprintf("%v.%v", params.TargetArch, params.TargetArch), "sys", confFile)
for _, s := range []struct{ dir, src, dst string }{
{params.UserspaceDir, "image", "image"},
{params.UserspaceDir, "key", "key"},
{kernelObjDir, "kernel.full", "obj/kernel.full"},
} {
fullSrc := filepath.Join(s.dir, s.src)
fullDst := filepath.Join(params.OutputDir, s.dst)
if err := osutil.CopyFile(fullSrc, fullDst); err != nil {
return ImageDetails{}, fmt.Errorf("failed to copy %v -> %v: %w", fullSrc, fullDst, err)
}
}
script := fmt.Sprintf(`
set -eux
md=$(sudo mdconfig -a -t vnode image)
partn=$(gpart show /dev/${md} | awk '/freebsd-ufs/{print $3}' | head -n 1)
tmpdir=$(mktemp -d)
sudo mount /dev/${md}p${partn} $tmpdir
sudo MAKEOBJDIRPREFIX=%s make -C %s installkernel WITH_EXTRA_TCP_STACKS= KERNCONF=%s DESTDIR=$tmpdir
cat | sudo tee ${tmpdir}/boot/loader.conf.local <<__EOF__
ipsec_load="YES"
pf_load="YES"
sctp_load="YES"
tcp_bbr_load="YES"
tcp_rack_load="YES"
sem_load="YES"
mqueuefs_load="YES"
cryptodev_load="YES"
cc_cdg_load="YES"
cc_chd_load="YES"
cc_cubic_load="YES"
cc_dctcp_load="YES"
cc_hd_load="YES"
cc_htcp_load="YES"
cc_vegas_load="YES"
filemon_load="YES"
kern.ipc.tls.enable="1"
vm.panic_on_oom="1"
__EOF__
cat | sudo tee -a ${tmpdir}/etc/sysctl.conf <<__EOF__
net.inet.sctp.udp_tunneling_port=9899
net.inet.tcp.udp_tunneling_port=9811
net.inet.tcp.bb.log_auto_all=1
net.inet.tcp.bb.log_auto_ratio=1
net.inet.tcp.bb.log_auto_mode=1
vm.redzone.panic=1
__EOF__
sudo umount $tmpdir
sudo mdconfig -d -u ${md#md}
`, objPrefix, params.KernelDir, confFile)
if debugOut, err := osutil.RunCmd(10*time.Minute, params.OutputDir, "/bin/sh", "-c", script); err != nil {
return ImageDetails{}, fmt.Errorf("error copying kernel: %w\n%v", err, debugOut)
}
return ImageDetails{}, nil
}
func (ctx freebsd) clean(params Params) error {
objPrefix := filepath.Join(params.KernelDir, "obj")
_, err := ctx.make(params.KernelDir, objPrefix, params.BuildCPUs, "cleanworld")
return err
}
func (ctx freebsd) make(kernelDir, objPrefix string, jobs int, makeArgs ...string) ([]byte, error) {
args := append([]string{
fmt.Sprintf("MAKEOBJDIRPREFIX=%v", objPrefix),
"make",
"-C", kernelDir,
"-j", strconv.Itoa(jobs),
}, makeArgs...)
output, err := osutil.RunCmd(3*time.Hour, kernelDir, "sh", "-c", strings.Join(args, " "))
return output, err
}
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