loader.h

/*
 * Copyright (c) 2018, Fabian Freyer <fabian.freyer@physik.tu-berlin.de>
 * All rights reserved.
 *
 * Redistribution and use in source and binary forms, with or without
 * modification, are permitted provided that the following conditions are met:
 *     * Redistributions of source code must retain the above copyright
 *       notice, this list of conditions and the following disclaimer.
 *     * Redistributions in binary form must reproduce the above copyright
 *       notice, this list of conditions and the following disclaimer in the
 *       documentation and/or other materials provided with the distribution.
 *     * Neither the name of the <organization> nor the
 *       names of its contributors may be used to endorse or promote products
 *       derived from this software without specific prior written permission.
 *
 * THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS "AS IS" AND
 * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED
 * WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE
 * DISCLAIMED. IN NO EVENT SHALL <COPYRIGHT HOLDER> BE LIABLE FOR ANY
 * DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES
 * (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES;
 * LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND
 * ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT
 * (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE OF THIS
 * SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
 */

#pragma once
#include <setjmp.h>
#include <sys/types.h>
#include <sys/queue.h>

#include <userboot.h>

#define USERBOOT_VERSION 4
#define MALLOCSZ	(64*1024*1024)

#define BOOTLOADER_NAME "bhyve-multiboot.so"

enum LOAD_TYPE {
	LOAD_ELF = 1,
	LOAD_AOUT = 2,
};

#define CALLBACK(fn, args...) (callbacks->fn(callbacks_arg , ##args))

extern struct loader_callbacks *callbacks;
extern void *callbacks_arg;

/**
 * @brief Error jump buffer to jump out.
 */
extern jmp_buf jb;

struct module {
    char *filename;
    char *string;
    SLIST_ENTRY(module) next;
};

typedef SLIST_HEAD(modules, module) modules_list_t;

struct args {
    const char* kernel_filename;
	const char* cmdline;
    modules_list_t modules;
};

extern struct loader_args args;

#define ERROR(err, str) do { \
			errno = err; \
			perror(str); \
		} while(0)

#define MIN(a,b) (((a)<(b))?(a):(b))
#define MAX(a,b) (((a)>(b))?(a):(b))