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/* $OpenBSD: debug_i386.S,v 1.12 2004/03/09 19:12:12 tom Exp $ */
/*
* Copyright (c) 1997 Michael Shalayeff
* All rights reserved.
*
* Redistribution and use in source and binary forms, with or without
* modification, are permitted provided that the following conditions
* are met:
* 1. Redistributions of source code must retain the above copyright
* notice, this list of conditions and the following disclaimer.
* 2. 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.
*
* THIS SOFTWARE IS PROVIDED BY THE AUTHOR ``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 THE REGENTS OR CONTRIBUTORS 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.
*
*/
#include <machine/asm.h>
#include <machine/psl.h>
#define _LOCORE
#include <machine/segments.h>
#include <machine/trap.h>
#include <debug_md.h>
#undef _LOCORE
/* do this way because some cpus (like cyrix 6x86) store garbage
* into high word, instead of zeroes.
*/
#define pushsr(sr) movl sr, %eax; pushl %eax
.text
.globl alltraps
alltraps:
pushal
pushsr(%ds)
pushsr(%es)
pushsr(%fs)
pushsr(%gs)
/* muck %cs, see note about pushsr() above */
movl 0xf*4(%esp), %eax
movzwl %ax, %eax
movl %eax, 0xf*4(%esp)
#ifdef DEBUG_DEBUG
movl $0xb8280, %edi
movl 0x0c*4(%esp), %eax /* trapno */
addb $'0', %al
movb $0x17, %ah
shll $16, %eax
movb 0x0d*4(%esp), %al /* error */
addb $'0', %al
movb $0x17, %ah
movl %eax, (%edi)
#endif
call _C_LABEL(check_regs)
#ifdef DEBUG_DEBUG
movl $0xb8290, %edi
movl $0x47394738, (%edi)
#endif
popl %gs
popl %fs
popl %es
popl %ds
popal
addl $0x8, %esp
hlt
iret
ENTRY(check_regs)
#ifdef DEBUG_DEBUG
movl $0xb8284, %edi
movl $0x47334732, (%edi)
#endif
movl $0x10, %eax
mov %ax, %ds
mov %ax, %es
movl $reg, %edi
cld
movl 0x0c*4(%esp), %eax; stosl /* %eax */
movl 0x0b*4(%esp), %eax; stosl /* %ecx */
movl 0x0a*4(%esp), %eax; stosl /* %edx */
movl 0x09*4(%esp), %eax; stosl /* %ebx */
movl 0x08*4(%esp), %eax; stosl /* %esp */
movl 0x07*4(%esp), %eax; stosl /* %ebp */
movl 0x06*4(%esp), %eax; stosl /* %esi */
movl 0x05*4(%esp), %eax; stosl /* %edi */
movl 0x0f*4(%esp), %eax; stosl /* %eip */
movl 0x11*4(%esp), %eax; stosl /* %eflags */
movl 0x10*4(%esp), %eax; stosl /* %cs */
mov %ss, %ax ; stosl /* %ss */
movl 0x04*4(%esp), %eax; stosl /* %ds */
movl 0x03*4(%esp), %eax; stosl /* %es */
movl 0x02*4(%esp), %eax; stosl /* %fs */
movl 0x01*4(%esp), %eax; stosl /* %gs */
#ifdef DEBUG_DEBUG
movl $0xb8288, %edi
movl $0x47354734, (%edi)
#endif
movl 0x0e*4(%esp), %ecx /* error */
movl 0x0d*4(%esp), %eax /* trapno */
pushl %ecx
pushl %eax
call _C_LABEL(dump_regs)
popl %eax
popl %eax
#ifdef DEBUG_DEBUG
movl $0xb828c, %edi
movl $0x47374736, (%edi)
#endif
ret
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