#include "kvm/kvm.h"

#include "util.h"

#include <inttypes.h>
#include <stdint.h>
#include <stdlib.h>
#include <stdio.h>

static void usage(char *argv[])
{
	fprintf(stderr, "  usage: %s <kernel-image>\n", argv[0]);
	exit(1);
}

int main(int argc, char *argv[])
{
	const char *kernel_filename;
	struct kvm *kvm;

	if (argc < 2)
		usage(argv);

	kernel_filename = argv[1];

	kvm = kvm__init();

	if (!kvm__load_kernel(kvm, kernel_filename))
		die("unable to load kernel %s", kernel_filename);

	kvm__reset_vcpu(kvm);

	kvm__enable_singlestep(kvm);

	for (;;) {
		kvm__run(kvm);

		switch (kvm->kvm_run->exit_reason) {
		case KVM_EXIT_DEBUG:
			kvm__show_registers(kvm);
			kvm__show_code(kvm);
			break;
		case KVM_EXIT_IO:
			kvm__emulate_io(kvm,
					kvm->kvm_run->io.port,
					(uint8_t *)kvm->kvm_run + kvm->kvm_run->io.data_offset,
					kvm->kvm_run->io.direction,
					kvm->kvm_run->io.size,
					kvm->kvm_run->io.count);
			goto exit_kvm;
			break;
		default:
			goto exit_kvm;
		}
	}

exit_kvm:
	fprintf(stderr, "KVM exit reason: %" PRIu32 " (\"%s\")\n",
		kvm->kvm_run->exit_reason, kvm_exit_reasons[kvm->kvm_run->exit_reason]);

	kvm__show_registers(kvm);
	kvm__show_code(kvm);

	return 0;
}