Catch attempts to queue to unregistered ISRs
[dragonfly.git] / sys / boot / pc32 / kgzldr / start.s
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1#
2# Copyright (c) 1999 Global Technology Associates, Inc.
3# All rights reserved.
4#
5# Redistribution and use in source and binary forms, with or without
6# modification, are permitted provided that the following conditions
7# are met:
8# 1. Redistributions of source code must retain the above copyright
9# notice, this list of conditions and the following disclaimer.
10# 2. Redistributions in binary form must reproduce the above copyright
11# notice, this list of conditions and the following disclaimer in the
12# documentation and/or other materials provided with the distribution.
13#
14# THIS SOFTWARE IS PROVIDED BY THE AUTHOR AND CONTRIBUTORS``AS IS'' AND
15# ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
16# IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR
17# PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE AUTHOR OR CONTRIBUTORS
18# BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY,
19# OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT
20# OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR
21# BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY,
22# WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE
23# OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE OF THIS SOFTWARE,
24# EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
25#
26# $FreeBSD: src/sys/boot/i386/kgzldr/start.s,v 1.2 1999/08/28 00:40:11 peter Exp $
1de703da 27# $DragonFly: src/sys/boot/pc32/kgzldr/start.s,v 1.2 2003/06/17 04:28:18 dillon Exp $
984263bc
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28#
29
30 .set entry,0x10 # kgz.entry
31
32 .globl _start
33
34# C startup code for kgzldr.
35
36_start: cld # String ops inc
37 movl $_edata,%edi # Start of bss
38 movl $_end,%ecx # Compute
39 subl %edi,%ecx # size
40 xorl %eax,%eax # Zero
41 rep # Clear
42 stosb # bss
43 pushl 0x4(%esp) # Pass howto flags
44 call boot # Call C code
45 popl %ecx # Clear stack
46 jmp *kgz+entry # To loaded code