/
main.go
94 lines (76 loc) · 2.23 KB
/
main.go
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// Copyright 2017-2019 the u-root Authors. All rights reserved
// Use of this source code is governed by a BSD-style
// license that can be found in the LICENSE file.
package main
import (
"flag"
"fmt"
"log"
"os"
"github.com/u-root/u-root/pkg/acpi"
"github.com/u-root/u-root/pkg/boot"
"github.com/u-root/u-root/pkg/boot/fit"
"github.com/u-root/u-root/pkg/vfile"
)
var (
dryRun = flag.Bool("dryrun", false, "Do not actually kexec into the boot config")
debug = flag.Bool("d", false, "Print debug output")
cmdline = flag.String("c", "earlyprintk=ttyS0,115200,keep console=ttyS0", "command line")
config = flag.String("config", "", "FIT configuration to use")
kernel = flag.String("k", "", "Kernel image node name.")
initramfs = flag.String("i", "", "InitRAMFS node name -- default none")
ringPath = flag.String("r", "", "Path to PGP keyring. Enforces signature if non-empty path")
rsdpLookup = flag.Bool("rsdp", false, "Derrive RSDP table pointer from environment")
)
var v = func(string, ...interface{}) {}
func main() {
flag.Parse()
if *debug {
v = log.Printf
}
if len(flag.Args()) != 1 {
log.Fatal("Usage: fitboot <file>")
}
f, err := fit.New(flag.Args()[0])
if err != nil {
log.Fatal(err)
}
f.Cmdline, f.Kernel, f.InitRAMFS, f.ConfigOverride = *cmdline, *kernel, *initramfs, *config
kn, in, err := f.LoadConfig()
if err == nil {
f.Kernel, f.InitRAMFS = kn, in
} else {
v("Configuration is not available: %v", err)
}
if f.Kernel == "" {
log.Fatal("kernel name is not found in fit configuration or pass through -k.")
}
v("Kernel name=%s, initramfs=%s", f.Kernel, f.InitRAMFS)
kernelCmd := *cmdline
if *rsdpLookup {
r, err := acpi.GetRSDP()
if err != nil {
log.Fatal("Unable to find acpi table in the environment.")
}
v("Found an RSDP at %#x", r.RSDPAddr())
kernelCmd = fmt.Sprintf("acpi_rsdp=%x %s", r.RSDPAddr(), kernelCmd)
}
f.Cmdline = kernelCmd
if *ringPath != "" {
ring, err := vfile.GetKeyRing(*ringPath)
if err != nil {
log.Fatal(err)
}
f.KeyRing = ring
}
if err := f.Load(*debug); err != nil {
log.Fatal(err)
}
if *dryRun {
v("Not trying to boot since this is a dry run")
os.Exit(0)
}
if err := boot.Execute(); err != nil {
log.Fatal(err)
}
}