Lots of changes to sys/netbsd (#397)

* Lots of changes to sys/netbsd:
- Removed a few syscalls that did not have proper constants defined.
- Autogenerated *.const files.
- Removed a few types like uid and gid, that were not available.
- Ran make generate

* Few changes for NetBSD support:
- Added sys/netbsd/init.go
- Added netbsd to sys/sys.go

* Fix order in sys/sys.go

* Update documentation for NetBSD

1 files changed, 74 insertions, 0 deletions

diff --git a/sys/syz-extract/netbsd.go b/sys/syz-extract/netbsd.go
new file mode 100644
index 000000000..da9e4b4f0
--- /dev/null
+++ b/sys/syz-extract/netbsd.go
@@ -0,0 +1,74 @@
+// 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 main
+
+import (
+	"fmt"
+	"os"
+	"path/filepath"
+
+	"github.com/google/syzkaller/pkg/compiler"
+)
+
+type netbsd struct{}
+
+func (*netbsd) prepare(sourcedir string, build bool, arches []string) error {
+	if sourcedir == "" {
+		return fmt.Errorf("provide path to kernel checkout via -sourcedir flag (or make extract SOURCEDIR)")
+	}
+	if !build {
+		return fmt.Errorf("netbsd requires -build flag")
+	}
+	return nil
+}
+
+func (*netbsd) prepareArch(arch *Arch) error {
+	if err := os.Symlink(filepath.Join(arch.sourceDir, "sys", "arch", "amd64", "include"),
+		filepath.Join(arch.buildDir, "machine")); err != nil {
+		return fmt.Errorf("failed to create link: %v", err)
+	}
+	if err := os.Symlink(filepath.Join(arch.sourceDir, "sys", "arch", "x86", "include"),
+		filepath.Join(arch.buildDir, "x86")); err != nil {
+		return fmt.Errorf("failed to create link: %v", err)
+	}
+	return nil
+}
+
+func (*netbsd) processFile(arch *Arch, info *compiler.ConstInfo) (map[string]uint64, map[string]bool, error) {
+	args := []string{
+		"-fmessage-length=0",
+		"-nostdinc",
+		"-D_KERNEL",
+		"-D__BSD_VISIBLE=1",
+		"-I", filepath.Join(arch.sourceDir, "sys"),
+		"-I", filepath.Join(arch.sourceDir, "sys", "sys"),
+		"-I", filepath.Join(arch.sourceDir, "sys", "arch", "amd64"),
+		"-I", filepath.Join(arch.sourceDir, "common", "include"),
+		"-I", filepath.Join(arch.sourceDir, "sys", "compat", "linux", "common"),
+		"-I", arch.buildDir,
+	}
+	for _, incdir := range info.Incdirs {
+		args = append(args, "-I"+filepath.Join(arch.sourceDir, incdir))
+	}
+	// Syscall consts on netbsd have weird prefixes sometimes,
+	// try to extract consts with these prefixes as well.
+	compatNames := make(map[string][]string)
+	for _, val := range info.Consts {
+		compat := "LINUX_" + val
+		compatNames[val] = append(compatNames[val], compat)
+		info.Consts = append(info.Consts, compat)
+	}
+	res, undeclared, err := extract(info, "gcc", args, "#include <sys/syscall.h>")
+	for orig, compats := range compatNames {
+		for _, compat := range compats {
+			if undeclared[orig] && !undeclared[compat] {
+				res[orig] = res[compat]
+				delete(res, compat)
+				delete(undeclared, orig)
+			}
+			delete(undeclared, compat)
+		}
+	}
+	return res, undeclared, err
+}