gootloader.go

package gootloader

import "C"
import (
	"fmt"
	"io/ioutil"
	"strconv"
)

//Bootloader data structure
type Bootloader struct {
	Name         string
	Arch         int // Architecture 32 or 64
	ModeBit      int // Workspace mode in bits 16 or 32
	Instructions []string
	Loaddest     int
}

const (
	_ggl_Halt = "halt: hlt\n"
)

func (r *Bootloader) getName(title string) int {
	println(title + r.Name)
	return 1
}
func (r *Bootloader) addInstruction(instruction string) int {

	r.Instructions = append(r.Instructions, instruction)
	return 1

}
func (r *Bootloader) Create() int {

	fmt.Println("org " + strconv.Itoa(r.Loaddest))
	r.Instructions = append([]string{"org " + strconv.Itoa(r.Loaddest) + "\n"}, r.Instructions...)
	r.Instructions = append([]string{"bits " + strconv.Itoa(r.ModeBit) + "\n"}, r.Instructions...)

	r.addInstruction(_ggl_Halt)

	r.addInstruction("times 510 - ($ - $$) db 0\n")
	r.addInstruction("dw 0xAA55")

	cInst := ""

	for _, element := range r.Instructions {

		cInst += element

	}

	ioutil.WriteFile("./"+r.Name+".asm", []byte(cInst), 0644)

	return 1

}

func (r *Bootloader) Print(message string) int {

	var loopIns = [...]string{
		".loop	lodsb\n",
		"or al, al\n",
		"jz halt\n",
		"int 0x10\n",
		"jmp .loop\n",
	}

	for _, element := range loopIns {

		r.addInstruction(element)

	}

	r.addInstruction("msg: db \"" + message + "\", 0\n")

	return 1

}