/*
 * Copyright (c) 1998 Robert Nordier
 * All rights reserved.
 *
 * Redistribution and use in source and binary forms are freely
 * permitted provided that the above copyright notice and this
 * paragraph and the following disclaimer are duplicated in all
 * such forms.
 *
 * This software is provided "AS IS" and without any express or
 * implied warranties, including, without limitation, the implied
 * warranties of merchantability and fitness for a particular
 * purpose.
 *
 * $FreeBSD: src/sys/boot/i386/btx/lib/btxcsu.s,v 1.3 1999/08/28 00:40:07 peter Exp $
 * $DragonFly: src/sys/boot/pc32/btx/lib/btxcsu.S,v 1.6 2004/07/27 19:37:19 dillon Exp $
 */

/*
 * BTX C startup code (ELF).  Executed from ../btx/btx.S
 */

#include "../../bootasm.h"

                /*
                 * Globals.
                 */
                .global _start
                .extern _edata, _end

                /*
                 * Client entry point.
                 */
_start: 
                pushl %eax                      # Save base address
                movl $_edata,%edi               # Clear BSS
                movl $_end,%ecx
                subl %edi,%ecx
                subl %eax,%eax
                rep
                stosb
                popl __base                     # Set base address
                movl %esp,%eax                  # Get base of arguments
                addl $USR_ARGSPACE-USR_ARGOFFSET,%eax
                movl %eax,__args
                call main                       # Invoke client main()
                call exit                       # Invoke client exit()

                /*
                 * Data
                 */
                .comm __base,4                  # Client base address
                .comm __args,4                  # Client arguments