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001 /* Copyright (C) 2004 The KOS Team 001 /* Copyright (C) 2004 The KOS Team >> 002 Copyright (C) 1999 Free Software Foundation, Inc. 002 003 003 This program is free software; you can redi 004 This program is free software; you can redistribute it and/or 004 modify it under the terms of the GNU Genera 005 modify it under the terms of the GNU General Public License 005 as published by the Free Software Foundatio 006 as published by the Free Software Foundation; either version 2 006 of the License, or (at your option) any lat 007 of the License, or (at your option) any later version. 007 008 008 This program is distributed in the hope tha 009 This program is distributed in the hope that it will be useful, 009 but WITHOUT ANY WARRANTY; without even the 010 but WITHOUT ANY WARRANTY; without even the implied warranty of 010 MERCHANTABILITY or FITNESS FOR A PARTICULAR 011 MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the 011 GNU General Public License for more details 012 GNU General Public License for more details. 012 013 013 You should have received a copy of the GNU 014 You should have received a copy of the GNU General Public License 014 along with this program; if not, write to t 015 along with this program; if not, write to the Free Software 015 Foundation, Inc., 59 Temple Place - Suite 3 016 Foundation, Inc., 59 Temple Place - Suite 330, Boston, MA 02111-1307, 016 USA. 017 USA. 017 */ 018 */ 018 #include "exception.h" 019 #include "exception.h" 019 020 020 .file "exception_wrappers.S" 021 .file "exception_wrappers.S" 021 022 022 .text 023 .text 023 024 024 /* The address of the table of handlers (defin 025 /* The address of the table of handlers (defined in exception.c) */ 025 .extern sos_exception_handler_array 026 .extern sos_exception_handler_array 026 027 027 /* The address of the table of wrappers (defin 028 /* The address of the table of wrappers (defined below, and shared 028 with exception.c */ 029 with exception.c */ 029 .globl sos_exception_wrapper_array 030 .globl sos_exception_wrapper_array 030 031 >> 032 031 /** 033 /** 032 * For exceptions with/without error code, ref 034 * For exceptions with/without error code, refer to Intel x86 doc vol 3, 033 * section 5.12 035 * section 5.12 034 */ 036 */ 035 037 036 /* These wrappers are for exceptions without e 038 /* These wrappers are for exceptions without error code */ 037 .irp id, \ 039 .irp id, \ 038 SOS_EXCEPT_DIVIDE_ERROR, 040 SOS_EXCEPT_DIVIDE_ERROR, \ 039 SOS_EXCEPT_DEBUG, 041 SOS_EXCEPT_DEBUG, \ 040 SOS_EXCEPT_NMI_INTERRUPT, 042 SOS_EXCEPT_NMI_INTERRUPT, \ 041 SOS_EXCEPT_BREAKPOINT, 043 SOS_EXCEPT_BREAKPOINT, \ 042 SOS_EXCEPT_OVERFLOW, 044 SOS_EXCEPT_OVERFLOW, \ 043 SOS_EXCEPT_BOUND_RANGE_EXCEDEED, 045 SOS_EXCEPT_BOUND_RANGE_EXCEDEED, \ 044 SOS_EXCEPT_INVALID_OPCODE, 046 SOS_EXCEPT_INVALID_OPCODE, \ 045 SOS_EXCEPT_DEVICE_NOT_AVAILABLE, 047 SOS_EXCEPT_DEVICE_NOT_AVAILABLE, \ 046 SOS_EXCEPT_COPROCESSOR_SEGMENT_OVERRU 048 SOS_EXCEPT_COPROCESSOR_SEGMENT_OVERRUN, \ 047 SOS_EXCEPT_INTEL_RESERVED_1, 049 SOS_EXCEPT_INTEL_RESERVED_1, \ 048 SOS_EXCEPT_FLOATING_POINT_ERROR, 050 SOS_EXCEPT_FLOATING_POINT_ERROR, \ 049 SOS_EXCEPT_MACHINE_CHECK, 051 SOS_EXCEPT_MACHINE_CHECK, \ 050 SOS_EXCEPT_INTEL_RESERVED_2, 052 SOS_EXCEPT_INTEL_RESERVED_2, \ 051 SOS_EXCEPT_INTEL_RESERVED_3, 053 SOS_EXCEPT_INTEL_RESERVED_3, \ 052 SOS_EXCEPT_INTEL_RESERVED_4, 054 SOS_EXCEPT_INTEL_RESERVED_4, \ 053 SOS_EXCEPT_INTEL_RESERVED_5, 055 SOS_EXCEPT_INTEL_RESERVED_5, \ 054 SOS_EXCEPT_INTEL_RESERVED_6, 056 SOS_EXCEPT_INTEL_RESERVED_6, \ 055 SOS_EXCEPT_INTEL_RESERVED_7, 057 SOS_EXCEPT_INTEL_RESERVED_7, \ 056 SOS_EXCEPT_INTEL_RESERVED_8, 058 SOS_EXCEPT_INTEL_RESERVED_8, \ 057 SOS_EXCEPT_INTEL_RESERVED_9, 059 SOS_EXCEPT_INTEL_RESERVED_9, \ 058 SOS_EXCEPT_INTEL_RESERVED_10, 060 SOS_EXCEPT_INTEL_RESERVED_10, \ 059 SOS_EXCEPT_INTEL_RESERVED_11, 061 SOS_EXCEPT_INTEL_RESERVED_11, \ 060 SOS_EXCEPT_INTEL_RESERVED_12, 062 SOS_EXCEPT_INTEL_RESERVED_12, \ 061 SOS_EXCEPT_INTEL_RESERVED_13, 063 SOS_EXCEPT_INTEL_RESERVED_13, \ 062 SOS_EXCEPT_INTEL_RESERVED_14 064 SOS_EXCEPT_INTEL_RESERVED_14 063 065 064 .p2align 2, 0x90 066 .p2align 2, 0x90 065 sos_exception_wrapper_\id: 067 sos_exception_wrapper_\id: 066 .type sos_exception_wrapper_\id,@funct 068 .type sos_exception_wrapper_\id,@function 067 069 068 /* Fake error code */ 070 /* Fake error code */ 069 pushl $0 071 pushl $0 070 /* Backup the context */ 072 /* Backup the context */ 071 pushl %ebp 073 pushl %ebp 072 movl %esp, %ebp 074 movl %esp, %ebp 073 075 074 pushl %edi 076 pushl %edi 075 pushl %esi 077 pushl %esi 076 pushl %edx 078 pushl %edx 077 pushl %ecx 079 pushl %ecx 078 pushl %ebx 080 pushl %ebx 079 pushl %eax 081 pushl %eax 080 subl $2,%esp 082 subl $2,%esp 081 pushw %ss 083 pushw %ss 082 pushw %ds 084 pushw %ds 083 pushw %es 085 pushw %es 084 pushw %fs 086 pushw %fs 085 pushw %gs 087 pushw %gs 086 088 087 /* !! 089 /* Call the handler with exception number as 088 * Call the handler with the e !! 090 * argument */ 089 * address of the stored CPU c << 090 */ << 091 pushl %esp << 092 pushl $\id 091 pushl $\id 093 leal sos_exception_handler_ar 092 leal sos_exception_handler_array,%edi 094 call *\id*4(%edi) 093 call *\id*4(%edi) 095 /* Unallocate the arguments pa !! 094 addl $4, %esp 096 addl $8, %esp << 097 095 098 /* Restore the context */ 096 /* Restore the context */ 099 popw %gs 097 popw %gs 100 popw %fs 098 popw %fs 101 popw %es 099 popw %es 102 popw %ds 100 popw %ds 103 popw %ss 101 popw %ss 104 addl $2,%esp 102 addl $2,%esp 105 popl %eax 103 popl %eax 106 popl %ebx 104 popl %ebx 107 popl %ecx 105 popl %ecx 108 popl %edx 106 popl %edx 109 popl %esi 107 popl %esi 110 popl %edi 108 popl %edi 111 109 112 popl %ebp 110 popl %ebp 113 /* Remove fake error code */ 111 /* Remove fake error code */ 114 addl $4, %esp 112 addl $4, %esp 115 iret 113 iret 116 .endr 114 .endr 117 115 118 /* These wrappers are for exceptions w 116 /* These wrappers are for exceptions with error code */ 119 .irp id, \ 117 .irp id, \ 120 SOS_EXCEPT_INVALID_TSS, 118 SOS_EXCEPT_INVALID_TSS, \ 121 SOS_EXCEPT_SEGMENT_NOT_PRESENT, 119 SOS_EXCEPT_SEGMENT_NOT_PRESENT, \ 122 SOS_EXCEPT_STACK_SEGMENT_FAULT, 120 SOS_EXCEPT_STACK_SEGMENT_FAULT, \ 123 SOS_EXCEPT_GENERAL_PROTECTION, 121 SOS_EXCEPT_GENERAL_PROTECTION, \ 124 SOS_EXCEPT_PAGE_FAULT, 122 SOS_EXCEPT_PAGE_FAULT, \ 125 SOS_EXCEPT_ALIGNEMENT_CHECK 123 SOS_EXCEPT_ALIGNEMENT_CHECK 126 124 127 .p2align 2, 0x90 125 .p2align 2, 0x90 128 sos_exception_wrapper_\id: 126 sos_exception_wrapper_\id: 129 .type sos_exception_wrapper_\id,@funct 127 .type sos_exception_wrapper_\id,@function 130 128 131 /* ret eflags */ 129 /* ret eflags */ 132 /* ret cs */ 130 /* ret cs */ 133 /* ret eip */ 131 /* ret eip */ 134 /* Error code */ 132 /* Error code */ 135 133 136 /* Backup the context */ 134 /* Backup the context */ 137 pushl %ebp 135 pushl %ebp 138 movl %esp, %ebp 136 movl %esp, %ebp 139 137 140 pushl %edi 138 pushl %edi 141 pushl %esi 139 pushl %esi 142 pushl %edx 140 pushl %edx 143 pushl %ecx 141 pushl %ecx 144 pushl %ebx 142 pushl %ebx 145 pushl %eax 143 pushl %eax 146 subl $2,%esp 144 subl $2,%esp 147 pushw %ss 145 pushw %ss 148 pushw %ds 146 pushw %ds 149 pushw %es 147 pushw %es 150 pushw %fs 148 pushw %fs 151 pushw %gs 149 pushw %gs 152 150 153 /* !! 151 /* Call the handler with exception number as 154 * Call the handler with the e !! 152 * argument */ 155 * address of the stored CPU c << 156 */ << 157 pushl %esp << 158 pushl $\id 153 pushl $\id 159 leal sos_exception_handler_ar 154 leal sos_exception_handler_array,%edi 160 call *\id*4(%edi) 155 call *\id*4(%edi) 161 /* Unallocate the arguments pa !! 156 addl $4, %esp 162 addl $8, %esp << 163 157 164 /* Restore the context */ 158 /* Restore the context */ 165 popw %gs 159 popw %gs 166 popw %fs 160 popw %fs 167 popw %es 161 popw %es 168 popw %ds 162 popw %ds 169 popw %ss 163 popw %ss 170 addl $2,%esp 164 addl $2,%esp 171 popl %eax 165 popl %eax 172 popl %ebx 166 popl %ebx 173 popl %ecx 167 popl %ecx 174 popl %edx 168 popl %edx 175 popl %esi 169 popl %esi 176 popl %edi 170 popl %edi 177 popl %ebp 171 popl %ebp 178 172 179 /* Error code isn't compatible 173 /* Error code isn't compatible with iretd */ 180 addl $4, %esp 174 addl $4, %esp 181 175 182 iret 176 iret 183 .endr 177 .endr 184 178 185 179 186 /* Double fault handler not supported. We must 180 /* Double fault handler not supported. We must define it since we 187 define an entry for it in the sos_exception !! 181 define an entry for it in the sos_exception_wrapper_array. */ 188 simply uses an alternate stack to display a << 189 system. qemu won't handle it correctly (see << 190 sources). */ << 191 #define ALTERNATE_DOUBLE_FAULT_STACK_SIZE 512 << 192 .irp id, SOS_EXCEPT_DOUBLE_FAULT 182 .irp id, SOS_EXCEPT_DOUBLE_FAULT 193 .p2align 2, 0x90 183 .p2align 2, 0x90 194 sos_exception_wrapper_\id: 184 sos_exception_wrapper_\id: 195 .type sos_exception_wrapper_\id,@function 185 .type sos_exception_wrapper_\id,@function 196 1: cli /* Not necessary */ !! 186 1: hlt 197 movl $double_fault_alternate_stack, %e !! 187 jmp 1b /* Machine halting */ 198 addl $ALTERNATE_DOUBLE_FAULT_STACK_SIZ << 199 movl %eax, %esp << 200 pushl $msg_double_fault_not_supported << 201 call sos_display_fatal_error ; jmp 1b << 202 .endr 188 .endr 203 189 204 .section ".rodata" << 205 msg_double_fault_not_supported: << 206 .string "exception_wrappers.S: Double << 207 << 208 /* Build the sos_irq_wrapper_array, shared wit 190 /* Build the sos_irq_wrapper_array, shared with interrupt.c */ >> 191 .section ".rodata" 209 .p2align 5, 0x0 192 .p2align 5, 0x0 210 sos_exception_wrapper_array: 193 sos_exception_wrapper_array: 211 .irp id, 0,1,2,3,4,5,6,7,8,9,10,11,12, 194 .irp id, 0,1,2,3,4,5,6,7,8,9,10,11,12,13,14,15, \ 212 16,17,18,19,20,21,22,23,24,25 195 16,17,18,19,20,21,22,23,24,25,26,27,29,30,31 213 .long (sos_exception_wrapper_\id) 196 .long (sos_exception_wrapper_\id) 214 .endr 197 .endr 215 << 216 /* Alternate stack for double fault handler */ << 217 .bss << 218 .p2align 2, 0x0 << 219 .size double_fault_alternate_stack, ALTERNATE_ << 220 double_fault_alternate_stack: << 221 .fill ALTERNATE_DOUBLE_FAULT_STACK_SIZ <<
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