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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 main
import (
"fmt"
"os"
"path/filepath"
"strings"
"github.com/google/syzkaller/pkg/compiler"
)
type openbsd struct{}
func (*openbsd) prepare(sourcedir string, build bool, arches []*Arch) error {
if !build {
return fmt.Errorf("openbsd requires -build flag")
}
return nil
}
func (*openbsd) prepareArch(arch *Arch) error {
if err := os.Symlink(filepath.Join(arch.sourceDir, "sys", "arch", "amd64", "include"),
filepath.Join(arch.buildDir, "amd64")); err != nil {
return fmt.Errorf("failed to create link: %w", err)
}
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: %w", err)
}
return nil
}
func (*openbsd) 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))
}
if arch.includeDirs != "" {
for _, dir := range strings.Split(arch.includeDirs, ",") {
args = append(args, "-I"+dir)
}
}
// Some syscalls on OpenBSD are prefixed with `SYS___' as opposed of the
// more common `SYS_' prefix.
syscallsQuirks := map[string]bool{
"SYS_get_tcb": true,
"SYS_getcwd": true,
"SYS_realpath": true,
"SYS_semctl": true,
"SYS_set_tcb": true,
"SYS_syscall": true,
"SYS_tfork": true,
"SYS_threxit": true,
"SYS_thrsigdivert": true,
"SYS_thrsleep": true,
"SYS_thrwakeup": true,
"SYS_tmpfd": true,
}
compatNames := make(map[string][]string)
for _, def := range info.Consts {
if _, ok := syscallsQuirks[def.Name]; ok {
compat := "SYS___" + def.Name[len("SYS_"):]
compatNames[def.Name] = append(compatNames[def.Name], compat)
info.Consts = append(info.Consts, &compiler.Const{Name: compat})
}
}
params := &extractParams{
AddSource: "#include <sys/syscall.h>",
TargetEndian: arch.target.HostEndian,
}
res, undeclared, err := extract(info, "cc", args, params)
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
}
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