amdfw

Golang library for reading and writing AMD firmware components

Credit goes to @cwerling for his psptool

amddump

cmd/amddump is a small tool, that dumps all informations known to this library on a specfic image.

amddump ryzeimage.rom

Current Limitations

• Always assumes valid FirmwareEntryTable.
  • Some AM1 CPUs are not using it.
  • Older FETs might be parsed wrong
• Non Directory-Based Firmware (IMC, GEC, XHCI) cannot be extracted
• All Offsets are treated as absolute. Partial Images often can't be read.

Usage

See cmd/amddump.go for read-only example code.

func main() {

	imageBytes, err := ioutil.ReadFile(os.Args[1])

	if err != nil {
		log.Fatal("Could not read file: ", err)
	}

	image, err := amdfw.ParseImage(imageBytes)

	if err != nil {
		log.Println("Error while parse Image: ", err.Error())
	}

	targetAddress := uint32(0x1C1000)
	image.FET.ImcRomBase = &targetAddress

	image.FET.Write(imageBytes, image.FET.Location)

	ioutil.WriteFile(os.Args[1], imageBytes, 666)
}