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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 /* 088 * Call the handler with the e 090 * Call the handler with the exception number and the 089 * address of the stored CPU c 091 * address of the stored CPU context as arguments 090 */ 092 */ 091 pushl %esp 093 pushl %esp 092 pushl $\id 094 pushl $\id 093 leal sos_exception_handler_ar 095 leal sos_exception_handler_array,%edi 094 call *\id*4(%edi) 096 call *\id*4(%edi) 095 /* Unallocate the arguments pa 097 /* Unallocate the arguments passed to the handler */ 096 addl $8, %esp 098 addl $8, %esp 097 099 098 /* Restore the context */ 100 /* Restore the context */ 099 popw %gs 101 popw %gs 100 popw %fs 102 popw %fs 101 popw %es 103 popw %es 102 popw %ds 104 popw %ds 103 popw %ss 105 popw %ss 104 addl $2,%esp 106 addl $2,%esp 105 popl %eax 107 popl %eax 106 popl %ebx 108 popl %ebx 107 popl %ecx 109 popl %ecx 108 popl %edx 110 popl %edx 109 popl %esi 111 popl %esi 110 popl %edi 112 popl %edi 111 113 112 popl %ebp 114 popl %ebp 113 /* Remove fake error code */ 115 /* Remove fake error code */ 114 addl $4, %esp 116 addl $4, %esp 115 iret 117 iret 116 .endr 118 .endr 117 119 118 /* These wrappers are for exceptions w 120 /* These wrappers are for exceptions with error code */ 119 .irp id, \ 121 .irp id, \ 120 SOS_EXCEPT_INVALID_TSS, 122 SOS_EXCEPT_INVALID_TSS, \ 121 SOS_EXCEPT_SEGMENT_NOT_PRESENT, 123 SOS_EXCEPT_SEGMENT_NOT_PRESENT, \ 122 SOS_EXCEPT_STACK_SEGMENT_FAULT, 124 SOS_EXCEPT_STACK_SEGMENT_FAULT, \ 123 SOS_EXCEPT_GENERAL_PROTECTION, 125 SOS_EXCEPT_GENERAL_PROTECTION, \ 124 SOS_EXCEPT_PAGE_FAULT, 126 SOS_EXCEPT_PAGE_FAULT, \ 125 SOS_EXCEPT_ALIGNEMENT_CHECK 127 SOS_EXCEPT_ALIGNEMENT_CHECK 126 128 127 .p2align 2, 0x90 129 .p2align 2, 0x90 128 sos_exception_wrapper_\id: 130 sos_exception_wrapper_\id: 129 .type sos_exception_wrapper_\id,@funct 131 .type sos_exception_wrapper_\id,@function 130 132 131 /* ret eflags */ 133 /* ret eflags */ 132 /* ret cs */ 134 /* ret cs */ 133 /* ret eip */ 135 /* ret eip */ 134 /* Error code */ 136 /* Error code */ 135 137 136 /* Backup the context */ 138 /* Backup the context */ 137 pushl %ebp 139 pushl %ebp 138 movl %esp, %ebp 140 movl %esp, %ebp 139 141 140 pushl %edi 142 pushl %edi 141 pushl %esi 143 pushl %esi 142 pushl %edx 144 pushl %edx 143 pushl %ecx 145 pushl %ecx 144 pushl %ebx 146 pushl %ebx 145 pushl %eax 147 pushl %eax 146 subl $2,%esp 148 subl $2,%esp 147 pushw %ss 149 pushw %ss 148 pushw %ds 150 pushw %ds 149 pushw %es 151 pushw %es 150 pushw %fs 152 pushw %fs 151 pushw %gs 153 pushw %gs 152 154 153 /* 155 /* 154 * Call the handler with the e 156 * Call the handler with the exception number and the 155 * address of the stored CPU c 157 * address of the stored CPU context as arguments 156 */ 158 */ 157 pushl %esp 159 pushl %esp 158 pushl $\id 160 pushl $\id 159 leal sos_exception_handler_ar 161 leal sos_exception_handler_array,%edi 160 call *\id*4(%edi) 162 call *\id*4(%edi) 161 /* Unallocate the arguments pa 163 /* Unallocate the arguments passed to the handler */ 162 addl $8, %esp 164 addl $8, %esp 163 165 164 /* Restore the context */ 166 /* Restore the context */ 165 popw %gs 167 popw %gs 166 popw %fs 168 popw %fs 167 popw %es 169 popw %es 168 popw %ds 170 popw %ds 169 popw %ss 171 popw %ss 170 addl $2,%esp 172 addl $2,%esp 171 popl %eax 173 popl %eax 172 popl %ebx 174 popl %ebx 173 popl %ecx 175 popl %ecx 174 popl %edx 176 popl %edx 175 popl %esi 177 popl %esi 176 popl %edi 178 popl %edi 177 popl %ebp 179 popl %ebp 178 180 179 /* Error code isn't compatible 181 /* Error code isn't compatible with iretd */ 180 addl $4, %esp 182 addl $4, %esp 181 183 182 iret 184 iret 183 .endr 185 .endr 184 186 185 187 186 /* Double fault handler not supported. We must 188 /* Double fault handler not supported. We must define it since we 187 define an entry for it in the sos_exception 189 define an entry for it in the sos_exception_wrapper_array. It 188 simply uses an alternate stack to display a 190 simply uses an alternate stack to display a message and stop the 189 system. qemu won't handle it correctly (see 191 system. qemu won't handle it correctly (see comment in qemu's 190 sources). */ 192 sources). */ 191 #define ALTERNATE_DOUBLE_FAULT_STACK_SIZE 512 193 #define ALTERNATE_DOUBLE_FAULT_STACK_SIZE 512 192 .irp id, SOS_EXCEPT_DOUBLE_FAULT 194 .irp id, SOS_EXCEPT_DOUBLE_FAULT 193 .p2align 2, 0x90 195 .p2align 2, 0x90 194 sos_exception_wrapper_\id: 196 sos_exception_wrapper_\id: 195 .type sos_exception_wrapper_\id,@function 197 .type sos_exception_wrapper_\id,@function 196 1: cli /* Not necessary */ 198 1: cli /* Not necessary */ 197 movl $double_fault_alternate_stack, %e 199 movl $double_fault_alternate_stack, %eax 198 addl $ALTERNATE_DOUBLE_FAULT_STACK_SIZ 200 addl $ALTERNATE_DOUBLE_FAULT_STACK_SIZE, %eax 199 movl %eax, %esp 201 movl %eax, %esp 200 pushl $msg_double_fault_not_supported 202 pushl $msg_double_fault_not_supported 201 call sos_display_fatal_error ; jmp 1b 203 call sos_display_fatal_error ; jmp 1b /* Not necessary */ 202 .endr 204 .endr 203 205 204 .section ".rodata" 206 .section ".rodata" 205 msg_double_fault_not_supported: 207 msg_double_fault_not_supported: 206 .string "exception_wrappers.S: Double 208 .string "exception_wrappers.S: Double fault detected ! NOT SUPPORTED yet. System Halted." 207 209 208 /* Build the sos_irq_wrapper_array, shared wit 210 /* Build the sos_irq_wrapper_array, shared with interrupt.c */ 209 .p2align 5, 0x0 211 .p2align 5, 0x0 210 sos_exception_wrapper_array: 212 sos_exception_wrapper_array: 211 .irp id, 0,1,2,3,4,5,6,7,8,9,10,11,12, 213 .irp id, 0,1,2,3,4,5,6,7,8,9,10,11,12,13,14,15, \ 212 16,17,18,19,20,21,22,23,24,25 214 16,17,18,19,20,21,22,23,24,25,26,27,29,30,31 213 .long (sos_exception_wrapper_\id) 215 .long (sos_exception_wrapper_\id) 214 .endr 216 .endr 215 217 216 /* Alternate stack for double fault handler */ 218 /* Alternate stack for double fault handler */ 217 .bss 219 .bss 218 .p2align 2, 0x0 220 .p2align 2, 0x0 219 .size double_fault_alternate_stack, ALTERNATE_ 221 .size double_fault_alternate_stack, ALTERNATE_DOUBLE_FAULT_STACK_SIZE 220 double_fault_alternate_stack: 222 double_fault_alternate_stack: 221 .fill ALTERNATE_DOUBLE_FAULT_STACK_SIZ 223 .fill ALTERNATE_DOUBLE_FAULT_STACK_SIZE, 1, 0x0
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