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