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sys/syz-extract: use consolidated target info

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Move knowledge about targets from extract.sh to syz-extract,
and make it use target into from sys.
This commit is contained in:
Dmitry Vyukov 2017-09-14 13:49:21 +02:00
parent 75ddf7ab90
commit f7eb58493b
4 changed files with 47 additions and 31 deletions
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2
Makefile
View File

@ -71,7 +71,7 @@ upgrade:
go build $(GOFLAGS) -o ./bin/syz-upgrade github.com/google/syzkaller/tools/syz-upgrade
extract: bin/syz-extract
LINUX=$(LINUX) LINUXBLD=$(LINUXBLD) ./sys/linux/extract.sh
LINUX=$(LINUX) ./sys/linux/extract.sh
bin/syz-extract:
go build $(GOFLAGS) -o $@ ./sys/syz-extract

31
sys/linux/extract.sh
View File

@ -41,36 +41,17 @@ fi
generate_arch() {
echo generating arch $1...
echo "cd $LINUX; make defconfig"
OUT=`(cd $LINUX; make ARCH=$2 CROSS_COMPILE=$3 CFLAGS=$4 defconfig 2>&1)`
if [ $? -ne 0 ]; then
echo "$OUT"
exit 1
fi
# Without CONFIG_NETFILTER kernel does not build.
(cd $LINUX; sed -i "s@# CONFIG_NETFILTER is not set@CONFIG_NETFILTER=y@g" .config)
(cd $LINUX; make ARCH=$2 CROSS_COMPILE=$3 CFLAGS=$4 olddefconfig)
echo "cd $LINUX; make"
OUT=`(cd $LINUX; make ARCH=$2 CROSS_COMPILE=$3 CFLAGS=$4 init/main.o 2>&1)`
if [ $? -ne 0 ]; then
echo "$OUT"
exit 1
fi
(cd sys/linux; ../../bin/syz-extract -arch $1 -linux "$LINUX" -linuxbld "$LINUXBLD" $FILES)
(cd sys/linux; ../../bin/syz-extract -arch $1 -linux "$LINUX" -build $FILES)
if [ $? -ne 0 ]; then
exit 1
fi
echo
}
# $1 Go arch
# $2 kernel arch
# $3 cross-compiler prefix
# $4 CLAGS
generate_arch amd64 x86_64 x86_64-linux-gnu- "-m64"
generate_arch arm64 arm64 aarch64-linux-gnu- ""
generate_arch amd64
generate_arch arm64
if [ "$BUILD_FOR_ANDROID" == "no" ]; then
generate_arch 386 i386 "" "-m32"
generate_arch arm arm arm-linux-gnueabihf- "-march=armv6t2"
generate_arch ppc64le powerpc powerpc64le-linux-gnu- ""
generate_arch 386
generate_arch arm
generate_arch ppc64le
fi

1
sys/sys.go
View File

@ -70,6 +70,7 @@ func init() {
for arch, target := range archs {
target.OS = OS
target.Arch = arch
target.CrossCFlags = append(target.CrossCFlags, target.CFlags...)
}
}
}

44
sys/syz-extract/extract.go
View File

@ -13,6 +13,7 @@ import (
"runtime"
"strings"
"sync"
"time"
"github.com/google/syzkaller/pkg/ast"
"github.com/google/syzkaller/pkg/compiler"
@ -24,6 +25,7 @@ var (
flagLinux = flag.String("linux", "", "path to linux kernel source checkout")
flagLinuxBld = flag.String("linuxbld", "", "path to linux kernel build directory")
flagArch = flag.String("arch", "", "arch to generate")
flagBuild = flag.Bool("build", false, "generate arch-specific files in the linux dir")
)
type File struct {
@ -33,11 +35,6 @@ type File struct {
}
func main() {
failf := func(msg string, args ...interface{}) {
fmt.Fprintf(os.Stderr, msg+"\n", args...)
os.Exit(1)
}
flag.Parse()
if *flagLinux == "" {
failf("provide path to linux kernel checkout via -linux flag (or make extract LINUX= flag)")
@ -56,6 +53,9 @@ func main() {
if n == 0 {
failf("usage: syz-extract -linux=/linux/checkout -arch=arch input_file.txt...")
}
if *flagBuild {
buildKernel(target, *flagLinux)
}
files := make([]File, n)
inc := make(chan *File, n)
@ -120,3 +120,37 @@ func processFile(target *sys.Target, inname string) (map[string]bool, error) {
}
return undeclared, nil
}
func buildKernel(target *sys.Target, dir string) {
// TODO(dvyukov): use separate temp build dir.
// This will allow to do build for all archs in parallel and
// won't destroy user's build state.
makeArgs := []string{
"ARCH=" + target.KernelArch,
"CROSS_COMPILE=" + target.CCompilerPrefix,
"CFLAGS=" + strings.Join(target.CrossCFlags, " "),
}
out, err := osutil.RunCmd(time.Hour, dir, "make", append(makeArgs, "defconfig")...)
if err != nil {
failf("make defconfig failed: %v\n%s\n", err, out)
}
// Without CONFIG_NETFILTER kernel does not build.
out, err = osutil.RunCmd(time.Minute, dir, "sed", "-i",
"s@# CONFIG_NETFILTER is not set@CONFIG_NETFILTER=y@g", ".config")
if err != nil {
failf("sed .config failed: %v\n%s\n", err, out)
}
out, err = osutil.RunCmd(time.Hour, dir, "make", append(makeArgs, "olddefconfig")...)
if err != nil {
failf("make olddefconfig failed: %v\n%s\n", err, out)
}
out, err = osutil.RunCmd(time.Hour, dir, "make", append(makeArgs, "init/main.o")...)
if err != nil {
failf("make failed: %v\n%s\n", err, out)
}
}
func failf(msg string, args ...interface{}) {
fmt.Fprintf(os.Stderr, msg+"\n", args...)
os.Exit(1)
}