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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 002 Copyright (C) 1999 Free Software Foundation, Inc. 003 003 004 This program is free software; you can redi 004 This program is free software; you can redistribute it and/or 005 modify it under the terms of the GNU Genera 005 modify it under the terms of the GNU General Public License 006 as published by the Free Software Foundatio 006 as published by the Free Software Foundation; either version 2 007 of the License, or (at your option) any lat 007 of the License, or (at your option) any later version. 008 008 009 This program is distributed in the hope tha 009 This program is distributed in the hope that it will be useful, 010 but WITHOUT ANY WARRANTY; without even the 010 but WITHOUT ANY WARRANTY; without even the implied warranty of 011 MERCHANTABILITY or FITNESS FOR A PARTICULAR 011 MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the 012 GNU General Public License for more details 012 GNU General Public License for more details. 013 013 014 You should have received a copy of the GNU 014 You should have received a copy of the GNU General Public License 015 along with this program; if not, write to t 015 along with this program; if not, write to the Free Software 016 Foundation, Inc., 59 Temple Place - Suite 3 016 Foundation, Inc., 59 Temple Place - Suite 330, Boston, MA 02111-1307, 017 USA. 017 USA. 018 */ 018 */ 019 #include "exception.h" 019 #include "exception.h" 020 020 021 .file "exception_wrappers.S" 021 .file "exception_wrappers.S" 022 022 023 .text 023 .text 024 024 025 /* The address of the table of handlers (defin 025 /* The address of the table of handlers (defined in exception.c) */ 026 .extern sos_exception_handler_array 026 .extern sos_exception_handler_array 027 027 028 /* The address of the table of wrappers (defin 028 /* The address of the table of wrappers (defined below, and shared 029 with exception.c */ 029 with exception.c */ 030 .globl sos_exception_wrapper_array 030 .globl sos_exception_wrapper_array 031 031 032 032 033 /** 033 /** 034 * For exceptions with/without error code, ref 034 * For exceptions with/without error code, refer to Intel x86 doc vol 3, 035 * section 5.12 035 * section 5.12 036 */ 036 */ 037 037 038 /* These wrappers are for exceptions without e 038 /* These wrappers are for exceptions without error code */ 039 .irp id, \ 039 .irp id, \ 040 SOS_EXCEPT_DIVIDE_ERROR, 040 SOS_EXCEPT_DIVIDE_ERROR, \ 041 SOS_EXCEPT_DEBUG, 041 SOS_EXCEPT_DEBUG, \ 042 SOS_EXCEPT_NMI_INTERRUPT, 042 SOS_EXCEPT_NMI_INTERRUPT, \ 043 SOS_EXCEPT_BREAKPOINT, 043 SOS_EXCEPT_BREAKPOINT, \ 044 SOS_EXCEPT_OVERFLOW, 044 SOS_EXCEPT_OVERFLOW, \ 045 SOS_EXCEPT_BOUND_RANGE_EXCEDEED, 045 SOS_EXCEPT_BOUND_RANGE_EXCEDEED, \ 046 SOS_EXCEPT_INVALID_OPCODE, 046 SOS_EXCEPT_INVALID_OPCODE, \ 047 SOS_EXCEPT_DEVICE_NOT_AVAILABLE, 047 SOS_EXCEPT_DEVICE_NOT_AVAILABLE, \ 048 SOS_EXCEPT_COPROCESSOR_SEGMENT_OVERRU 048 SOS_EXCEPT_COPROCESSOR_SEGMENT_OVERRUN, \ 049 SOS_EXCEPT_INTEL_RESERVED_1, 049 SOS_EXCEPT_INTEL_RESERVED_1, \ 050 SOS_EXCEPT_FLOATING_POINT_ERROR, 050 SOS_EXCEPT_FLOATING_POINT_ERROR, \ 051 SOS_EXCEPT_MACHINE_CHECK, 051 SOS_EXCEPT_MACHINE_CHECK, \ 052 SOS_EXCEPT_INTEL_RESERVED_2, 052 SOS_EXCEPT_INTEL_RESERVED_2, \ 053 SOS_EXCEPT_INTEL_RESERVED_3, 053 SOS_EXCEPT_INTEL_RESERVED_3, \ 054 SOS_EXCEPT_INTEL_RESERVED_4, 054 SOS_EXCEPT_INTEL_RESERVED_4, \ 055 SOS_EXCEPT_INTEL_RESERVED_5, 055 SOS_EXCEPT_INTEL_RESERVED_5, \ 056 SOS_EXCEPT_INTEL_RESERVED_6, 056 SOS_EXCEPT_INTEL_RESERVED_6, \ 057 SOS_EXCEPT_INTEL_RESERVED_7, 057 SOS_EXCEPT_INTEL_RESERVED_7, \ 058 SOS_EXCEPT_INTEL_RESERVED_8, 058 SOS_EXCEPT_INTEL_RESERVED_8, \ 059 SOS_EXCEPT_INTEL_RESERVED_9, 059 SOS_EXCEPT_INTEL_RESERVED_9, \ 060 SOS_EXCEPT_INTEL_RESERVED_10, 060 SOS_EXCEPT_INTEL_RESERVED_10, \ 061 SOS_EXCEPT_INTEL_RESERVED_11, 061 SOS_EXCEPT_INTEL_RESERVED_11, \ 062 SOS_EXCEPT_INTEL_RESERVED_12, 062 SOS_EXCEPT_INTEL_RESERVED_12, \ 063 SOS_EXCEPT_INTEL_RESERVED_13, 063 SOS_EXCEPT_INTEL_RESERVED_13, \ 064 SOS_EXCEPT_INTEL_RESERVED_14 064 SOS_EXCEPT_INTEL_RESERVED_14 065 065 066 .p2align 2, 0x90 066 .p2align 2, 0x90 067 sos_exception_wrapper_\id: 067 sos_exception_wrapper_\id: 068 .type sos_exception_wrapper_\id,@funct 068 .type sos_exception_wrapper_\id,@function 069 069 070 /* Fake error code */ 070 /* Fake error code */ 071 pushl $0 071 pushl $0 072 /* Backup the context */ 072 /* Backup the context */ 073 pushl %ebp 073 pushl %ebp 074 movl %esp, %ebp 074 movl %esp, %ebp 075 075 076 pushl %edi 076 pushl %edi 077 pushl %esi 077 pushl %esi 078 pushl %edx 078 pushl %edx 079 pushl %ecx 079 pushl %ecx 080 pushl %ebx 080 pushl %ebx 081 pushl %eax 081 pushl %eax 082 subl $2,%esp 082 subl $2,%esp 083 pushw %ss 083 pushw %ss 084 pushw %ds 084 pushw %ds 085 pushw %es 085 pushw %es 086 pushw %fs 086 pushw %fs 087 pushw %gs 087 pushw %gs 088 088 089 /* !! 089 /* Call the handler with exception number as 090 * Call the handler with the e !! 090 * argument */ 091 * address of the stored CPU c << 092 */ << 093 pushl %esp << 094 pushl $\id 091 pushl $\id 095 leal sos_exception_handler_ar 092 leal sos_exception_handler_array,%edi 096 call *\id*4(%edi) 093 call *\id*4(%edi) 097 /* Unallocate the arguments pa !! 094 addl $4, %esp 098 addl $8, %esp << 099 095 100 /* Restore the context */ 096 /* Restore the context */ 101 popw %gs 097 popw %gs 102 popw %fs 098 popw %fs 103 popw %es 099 popw %es 104 popw %ds 100 popw %ds 105 popw %ss 101 popw %ss 106 addl $2,%esp 102 addl $2,%esp 107 popl %eax 103 popl %eax 108 popl %ebx 104 popl %ebx 109 popl %ecx 105 popl %ecx 110 popl %edx 106 popl %edx 111 popl %esi 107 popl %esi 112 popl %edi 108 popl %edi 113 109 114 popl %ebp 110 popl %ebp 115 /* Remove fake error code */ 111 /* Remove fake error code */ 116 addl $4, %esp 112 addl $4, %esp 117 iret 113 iret 118 .endr 114 .endr 119 115 120 /* These wrappers are for exceptions w 116 /* These wrappers are for exceptions with error code */ 121 .irp id, \ 117 .irp id, \ 122 SOS_EXCEPT_INVALID_TSS, 118 SOS_EXCEPT_INVALID_TSS, \ 123 SOS_EXCEPT_SEGMENT_NOT_PRESENT, 119 SOS_EXCEPT_SEGMENT_NOT_PRESENT, \ 124 SOS_EXCEPT_STACK_SEGMENT_FAULT, 120 SOS_EXCEPT_STACK_SEGMENT_FAULT, \ 125 SOS_EXCEPT_GENERAL_PROTECTION, 121 SOS_EXCEPT_GENERAL_PROTECTION, \ 126 SOS_EXCEPT_PAGE_FAULT, 122 SOS_EXCEPT_PAGE_FAULT, \ 127 SOS_EXCEPT_ALIGNEMENT_CHECK 123 SOS_EXCEPT_ALIGNEMENT_CHECK 128 124 129 .p2align 2, 0x90 125 .p2align 2, 0x90 130 sos_exception_wrapper_\id: 126 sos_exception_wrapper_\id: 131 .type sos_exception_wrapper_\id,@funct 127 .type sos_exception_wrapper_\id,@function 132 128 133 /* ret eflags */ 129 /* ret eflags */ 134 /* ret cs */ 130 /* ret cs */ 135 /* ret eip */ 131 /* ret eip */ 136 /* Error code */ 132 /* Error code */ 137 133 138 /* Backup the context */ 134 /* Backup the context */ 139 pushl %ebp 135 pushl %ebp 140 movl %esp, %ebp 136 movl %esp, %ebp 141 137 142 pushl %edi 138 pushl %edi 143 pushl %esi 139 pushl %esi 144 pushl %edx 140 pushl %edx 145 pushl %ecx 141 pushl %ecx 146 pushl %ebx 142 pushl %ebx 147 pushl %eax 143 pushl %eax 148 subl $2,%esp 144 subl $2,%esp 149 pushw %ss 145 pushw %ss 150 pushw %ds 146 pushw %ds 151 pushw %es 147 pushw %es 152 pushw %fs 148 pushw %fs 153 pushw %gs 149 pushw %gs 154 150 155 /* !! 151 /* Call the handler with exception number as 156 * Call the handler with the e !! 152 * argument */ 157 * address of the stored CPU c << 158 */ << 159 pushl %esp << 160 pushl $\id 153 pushl $\id 161 leal sos_exception_handler_ar 154 leal sos_exception_handler_array,%edi 162 call *\id*4(%edi) 155 call *\id*4(%edi) 163 /* Unallocate the arguments pa !! 156 addl $4, %esp 164 addl $8, %esp << 165 157 166 /* Restore the context */ 158 /* Restore the context */ 167 popw %gs 159 popw %gs 168 popw %fs 160 popw %fs 169 popw %es 161 popw %es 170 popw %ds 162 popw %ds 171 popw %ss 163 popw %ss 172 addl $2,%esp 164 addl $2,%esp 173 popl %eax 165 popl %eax 174 popl %ebx 166 popl %ebx 175 popl %ecx 167 popl %ecx 176 popl %edx 168 popl %edx 177 popl %esi 169 popl %esi 178 popl %edi 170 popl %edi 179 popl %ebp 171 popl %ebp 180 172 181 /* Error code isn't compatible 173 /* Error code isn't compatible with iretd */ 182 addl $4, %esp 174 addl $4, %esp 183 175 184 iret 176 iret 185 .endr 177 .endr 186 178 187 179 188 /* Double fault handler not supported. We must 180 /* Double fault handler not supported. We must define it since we 189 define an entry for it in the sos_exception !! 181 define an entry for it in the sos_exception_wrapper_array. */ 190 simply uses an alternate stack to display a << 191 system. qemu won't handle it correctly (see << 192 sources). */ << 193 #define ALTERNATE_DOUBLE_FAULT_STACK_SIZE 512 << 194 .irp id, SOS_EXCEPT_DOUBLE_FAULT 182 .irp id, SOS_EXCEPT_DOUBLE_FAULT 195 .p2align 2, 0x90 183 .p2align 2, 0x90 196 sos_exception_wrapper_\id: 184 sos_exception_wrapper_\id: 197 .type sos_exception_wrapper_\id,@function 185 .type sos_exception_wrapper_\id,@function 198 1: cli /* Not necessary */ !! 186 1: hlt 199 movl $double_fault_alternate_stack, %e !! 187 jmp 1b /* Machine halting */ 200 addl $ALTERNATE_DOUBLE_FAULT_STACK_SIZ << 201 movl %eax, %esp << 202 pushl $msg_double_fault_not_supported << 203 call sos_display_fatal_error ; jmp 1b << 204 .endr 188 .endr 205 189 206 .section ".rodata" << 207 msg_double_fault_not_supported: << 208 .string "exception_wrappers.S: Double << 209 << 210 /* Build the sos_irq_wrapper_array, shared wit 190 /* Build the sos_irq_wrapper_array, shared with interrupt.c */ >> 191 .section ".rodata" 211 .p2align 5, 0x0 192 .p2align 5, 0x0 212 sos_exception_wrapper_array: 193 sos_exception_wrapper_array: 213 .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, \ 214 16,17,18,19,20,21,22,23,24,25 195 16,17,18,19,20,21,22,23,24,25,26,27,29,30,31 215 .long (sos_exception_wrapper_\id) 196 .long (sos_exception_wrapper_\id) 216 .endr 197 .endr 217 << 218 /* Alternate stack for double fault handler */ << 219 .bss << 220 .p2align 2, 0x0 << 221 .size double_fault_alternate_stack, ALTERNATE_ << 222 double_fault_alternate_stack: << 223 .fill ALTERNATE_DOUBLE_FAULT_STACK_SIZ <<
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