/* Copyright (C) 2004  The KOS Team   Copyright (C) 1999  Free Software Foundation, Inc.   This program is free software; you can redistribute it and/or   modify it under the terms of the GNU General Public License   as published by the Free Software Foundation; either version 2   of the License, or (at your option) any later version.      This program is distributed in the hope that it will be useful,   but WITHOUT ANY WARRANTY; without even the implied warranty of   MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the   GNU General Public License for more details.      You should have received a copy of the GNU General Public License   along with this program; if not, write to the Free Software   Foundation, Inc., 59 Temple Place - Suite 330, Boston, MA 02111-1307,   USA. */#include "exception.h"         .file "exception_wrappers.S".text/* The address of the table of handlers (defined in exception.c) */.extern sos_exception_handler_array/* The address of the table of wrappers (defined below, and shared   with exception.c */.globl sos_exception_wrapper_array	/** * For exceptions with/without error code, refer to Intel x86 doc vol 3, * section 5.12 *//* These wrappers are for exceptions without error code */.irp id,                              \         SOS_EXCEPT_DIVIDE_ERROR,                \         SOS_EXCEPT_DEBUG,                       \         SOS_EXCEPT_NMI_INTERRUPT,               \         SOS_EXCEPT_BREAKPOINT,                  \         SOS_EXCEPT_OVERFLOW,                    \         SOS_EXCEPT_BOUND_RANGE_EXCEDEED,        \         SOS_EXCEPT_INVALID_OPCODE,              \         SOS_EXCEPT_DEVICE_NOT_AVAILABLE,        \         SOS_EXCEPT_COPROCESSOR_SEGMENT_OVERRUN, \         SOS_EXCEPT_INTEL_RESERVED_1,            \         SOS_EXCEPT_FLOATING_POINT_ERROR,        \         SOS_EXCEPT_MACHINE_CHECK,               \         SOS_EXCEPT_INTEL_RESERVED_2,            \         SOS_EXCEPT_INTEL_RESERVED_3,            \         SOS_EXCEPT_INTEL_RESERVED_4,            \         SOS_EXCEPT_INTEL_RESERVED_5,            \         SOS_EXCEPT_INTEL_RESERVED_6,            \         SOS_EXCEPT_INTEL_RESERVED_7,            \         SOS_EXCEPT_INTEL_RESERVED_8,            \         SOS_EXCEPT_INTEL_RESERVED_9,            \         SOS_EXCEPT_INTEL_RESERVED_10,           \         SOS_EXCEPT_INTEL_RESERVED_11,           \         SOS_EXCEPT_INTEL_RESERVED_12,           \         SOS_EXCEPT_INTEL_RESERVED_13,           \         SOS_EXCEPT_INTEL_RESERVED_14         .p2align 2, 0x90        sos_exception_wrapper_\id:        .type sos_exception_wrapper_\id,@function                 /* Fake error code */                pushl $0                /* Backup the context */                pushl %ebp                movl %esp, %ebp                 pushl %edi                pushl %esi                pushl %edx                pushl %ecx                pushl %ebx                pushl %eax                subl  $2,%esp                pushw %ss                pushw %ds                pushw %es                pushw %fs                pushw %gs                 /* Call the handler with exception number as                 * argument */                pushl $\id                leal  sos_exception_handler_array,%edi                call  *\id*4(%edi)                addl  $4, %esp                /* Restore the context */                popw  %gs                popw  %fs                popw  %es                popw  %ds                popw  %ss                addl  $2,%esp                popl  %eax                popl  %ebx                popl  %ecx                popl  %edx                popl  %esi                popl  %edi                 popl  %ebp                /* Remove fake error code */                addl $4, %esp                iret.endr          /* These wrappers are for exceptions with error code */.irp id,                              \	SOS_EXCEPT_INVALID_TSS,                  \	SOS_EXCEPT_SEGMENT_NOT_PRESENT,          \	SOS_EXCEPT_STACK_SEGMENT_FAULT,          \	SOS_EXCEPT_GENERAL_PROTECTION,           \	SOS_EXCEPT_PAGE_FAULT,                   \	SOS_EXCEPT_ALIGNEMENT_CHECK         .p2align 2, 0x90        sos_exception_wrapper_\id:        .type sos_exception_wrapper_\id,@function                 /* ret eflags */                /* ret cs */                /* ret eip */                /* Error code */                 /* Backup the context */                pushl %ebp                movl %esp, %ebp                 pushl %edi                pushl %esi                pushl %edx                pushl %ecx                pushl %ebx                pushl %eax                subl  $2,%esp                pushw %ss                pushw %ds                pushw %es                pushw %fs                pushw %gs                /* Call the handler with exception number as                 * argument */                pushl $\id                leal  sos_exception_handler_array,%edi                call  *\id*4(%edi)                addl  $4, %esp                /* Restore the context */                popw  %gs                popw  %fs                popw  %es                popw  %ds                popw  %ss                addl  $2,%esp                popl  %eax                popl  %ebx                popl  %ecx                popl  %edx                popl  %esi                popl  %edi                popl  %ebp                 /* Error code isn't compatible with iretd */                addl $4, %esp                 iret.endr/* Double fault handler not supported. We must define it since we   define an entry for it in the sos_exception_wrapper_array. */.irp id, SOS_EXCEPT_DOUBLE_FAULT.p2align 2, 0x90sos_exception_wrapper_\id:.type sos_exception_wrapper_\id,@function1:	hlt	jmp 1b /* Machine halting */.endr/* Build the sos_irq_wrapper_array, shared with interrupt.c */.section ".rodata".p2align 5, 0x0sos_exception_wrapper_array:	.irp id, 0,1,2,3,4,5,6,7,8,9,10,11,12,13,14,15, \	         16,17,18,19,20,21,22,23,24,25,26,27,29,30,31	  .long (sos_exception_wrapper_\id)	.endr