Navigation
- Accueil
- Présentation :
- FAQ
- Bugs et errata
- Contributions de lecteurs
- Téléchargements
- LXR (référencement des sources)
- Mailing-list
- Liens et Projets reliés
Site hébergé par :
Site hébergé par :
|
[ source navigation ] [ diff markup ] [ identifier search ] [ general search ] |
|||
|
||||
001 /* Copyright (C) 2004 David Decotigny 001 /* Copyright (C) 2004 David Decotigny 002 002 003 This program is free software; you can redi 003 This program is free software; you can redistribute it and/or 004 modify it under the terms of the GNU Genera 004 modify it under the terms of the GNU General Public License 005 as published by the Free Software Foundatio 005 as published by the Free Software Foundation; either version 2 006 of the License, or (at your option) any lat 006 of the License, or (at your option) any later version. 007 007 008 This program is distributed in the hope tha 008 This program is distributed in the hope that it will be useful, 009 but WITHOUT ANY WARRANTY; without even the 009 but WITHOUT ANY WARRANTY; without even the implied warranty of 010 MERCHANTABILITY or FITNESS FOR A PARTICULAR 010 MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the 011 GNU General Public License for more details 011 GNU General Public License for more details. 012 012 013 You should have received a copy of the GNU 013 You should have received a copy of the GNU General Public License 014 along with this program; if not, write to t 014 along with this program; if not, write to the Free Software 015 Foundation, Inc., 59 Temple Place - Suite 3 015 Foundation, Inc., 59 Temple Place - Suite 330, Boston, MA 02111-1307, 016 USA. 016 USA. 017 */ 017 */ 018 #include "idt.h" 018 #include "idt.h" 019 #include "irq.h" 019 #include "irq.h" 020 020 021 #include <sos/assert.h> 021 #include <sos/assert.h> 022 #include <drivers/bochs.h> << 023 #include <sos/thread.h> << 024 << 025 #include "exception.h" 022 #include "exception.h" 026 023 027 /* array of exception wrappers, defined in exc 024 /* array of exception wrappers, defined in exception_wrappers.S */ 028 extern sos_vaddr_t sos_exception_wrapper_array 025 extern sos_vaddr_t sos_exception_wrapper_array[SOS_EXCEPT_NUM]; 029 026 030 /* arrays of exception handlers, shared with e 027 /* arrays of exception handlers, shared with exception_wrappers.S */ 031 sos_exception_handler_t sos_exception_handler_ 028 sos_exception_handler_t sos_exception_handler_array[SOS_EXCEPT_NUM] = 032 { NULL, }; 029 { NULL, }; 033 030 034 /* List of exception names for the x86 archite 031 /* List of exception names for the x86 architecture */ 035 static const char * sos_x86_exnames[] = { 032 static const char * sos_x86_exnames[] = { 036 [SOS_EXCEPT_DIVIDE_ERROR] = " 033 [SOS_EXCEPT_DIVIDE_ERROR] = "Division by zero", 037 [SOS_EXCEPT_DEBUG] = " 034 [SOS_EXCEPT_DEBUG] = "Debug", 038 [SOS_EXCEPT_NMI_INTERRUPT] = " 035 [SOS_EXCEPT_NMI_INTERRUPT] = "Non Maskable Interrupt", 039 [SOS_EXCEPT_BREAKPOINT] = " 036 [SOS_EXCEPT_BREAKPOINT] = "Breakpoint", 040 [SOS_EXCEPT_OVERFLOW] = " 037 [SOS_EXCEPT_OVERFLOW] = "Overflow", 041 [SOS_EXCEPT_BOUND_RANGE_EXCEDEED] = " 038 [SOS_EXCEPT_BOUND_RANGE_EXCEDEED] = "Bound Range Exceeded", 042 [SOS_EXCEPT_INVALID_OPCODE] = " 039 [SOS_EXCEPT_INVALID_OPCODE] = "Invalid Opcode", 043 [SOS_EXCEPT_DEVICE_NOT_AVAILABLE] = " 040 [SOS_EXCEPT_DEVICE_NOT_AVAILABLE] = "Device Unavailable", 044 [SOS_EXCEPT_DOUBLE_FAULT] = " 041 [SOS_EXCEPT_DOUBLE_FAULT] = "Double Fault", 045 [SOS_EXCEPT_COPROCESSOR_SEGMENT_OVERRUN] = " 042 [SOS_EXCEPT_COPROCESSOR_SEGMENT_OVERRUN] = "Coprocessor Segment Overrun", 046 [SOS_EXCEPT_INVALID_TSS] = " 043 [SOS_EXCEPT_INVALID_TSS] = "Invalid TSS", 047 [SOS_EXCEPT_SEGMENT_NOT_PRESENT] = " 044 [SOS_EXCEPT_SEGMENT_NOT_PRESENT] = "Segment Not Present", 048 [SOS_EXCEPT_STACK_SEGMENT_FAULT] = " 045 [SOS_EXCEPT_STACK_SEGMENT_FAULT] = "Stack Segfault", 049 [SOS_EXCEPT_GENERAL_PROTECTION] = " 046 [SOS_EXCEPT_GENERAL_PROTECTION] = "General Protection", 050 [SOS_EXCEPT_PAGE_FAULT] = " 047 [SOS_EXCEPT_PAGE_FAULT] = "Page Fault", 051 [SOS_EXCEPT_INTEL_RESERVED_1] = " 048 [SOS_EXCEPT_INTEL_RESERVED_1] = "INTEL1", 052 [SOS_EXCEPT_FLOATING_POINT_ERROR] = " 049 [SOS_EXCEPT_FLOATING_POINT_ERROR] = "FP Error", 053 [SOS_EXCEPT_ALIGNEMENT_CHECK] = " 050 [SOS_EXCEPT_ALIGNEMENT_CHECK] = "Alignment Check", 054 [SOS_EXCEPT_MACHINE_CHECK] = " 051 [SOS_EXCEPT_MACHINE_CHECK] = "Machine Check", 055 [SOS_EXCEPT_INTEL_RESERVED_2] = " 052 [SOS_EXCEPT_INTEL_RESERVED_2] = "INTEL2", 056 [SOS_EXCEPT_INTEL_RESERVED_3] = " 053 [SOS_EXCEPT_INTEL_RESERVED_3] = "INTEL3", 057 [SOS_EXCEPT_INTEL_RESERVED_4] = " 054 [SOS_EXCEPT_INTEL_RESERVED_4] = "INTEL4", 058 [SOS_EXCEPT_INTEL_RESERVED_5] = " 055 [SOS_EXCEPT_INTEL_RESERVED_5] = "INTEL5", 059 [SOS_EXCEPT_INTEL_RESERVED_6] = " 056 [SOS_EXCEPT_INTEL_RESERVED_6] = "INTEL6", 060 [SOS_EXCEPT_INTEL_RESERVED_7] = " 057 [SOS_EXCEPT_INTEL_RESERVED_7] = "INTEL7", 061 [SOS_EXCEPT_INTEL_RESERVED_8] = " 058 [SOS_EXCEPT_INTEL_RESERVED_8] = "INTEL8", 062 [SOS_EXCEPT_INTEL_RESERVED_9] = " 059 [SOS_EXCEPT_INTEL_RESERVED_9] = "INTEL9", 063 [SOS_EXCEPT_INTEL_RESERVED_10] = " 060 [SOS_EXCEPT_INTEL_RESERVED_10] = "INTEL10", 064 [SOS_EXCEPT_INTEL_RESERVED_11] = " 061 [SOS_EXCEPT_INTEL_RESERVED_11] = "INTEL11", 065 [SOS_EXCEPT_INTEL_RESERVED_12] = " 062 [SOS_EXCEPT_INTEL_RESERVED_12] = "INTEL12", 066 [SOS_EXCEPT_INTEL_RESERVED_13] = " 063 [SOS_EXCEPT_INTEL_RESERVED_13] = "INTEL13", 067 [SOS_EXCEPT_INTEL_RESERVED_14] = " 064 [SOS_EXCEPT_INTEL_RESERVED_14] = "INTEL14" 068 }; 065 }; 069 066 070 067 071 /* Catch-all exception handler */ 068 /* Catch-all exception handler */ 072 static void sos_generic_ex(int exid, struct so !! 069 static void sos_generic_ex(int exid, const struct sos_cpu_state *ctxt) 073 __attribute__((noreturn)); << 074 static void sos_generic_ex(int exid, struct so << 075 { 070 { 076 const char *exname = sos_exception_get_name( 071 const char *exname = sos_exception_get_name(exid); 077 072 078 if (sos_cpu_context_is_in_user_mode(ctxt)) !! 073 sos_display_fatal_error("Exception %s in Kernel at instruction 0x%x (info=%x)!\n", 079 { !! 074 exname, 080 /* Exception while in user mode */ !! 075 sos_cpu_context_get_PC(ctxt), 081 sos_bochs_printf("Exception %s in User m !! 076 (unsigned)sos_cpu_context_get_EX_info(ctxt)); 082 exname, << 083 sos_cpu_context_get_PC( << 084 (unsigned)sos_cpu_conte << 085 sos_bochs_printf("Terminating User threa << 086 sos_thread_exit(); << 087 } << 088 else << 089 sos_display_fatal_error("Exception %s in K << 090 exname, << 091 sos_cpu_context_ge << 092 (unsigned)sos_cpu_ << 093 } 077 } 094 078 095 079 096 sos_ret_t sos_exception_subsystem_setup(void) 080 sos_ret_t sos_exception_subsystem_setup(void) 097 { 081 { 098 sos_ret_t retval; 082 sos_ret_t retval; 099 int exid; 083 int exid; 100 084 101 /* Setup the generic exception handler by de 085 /* Setup the generic exception handler by default for everybody 102 except for the double fault exception */ 086 except for the double fault exception */ 103 for (exid = 0 ; exid < SOS_EXCEPT_NUM ; exid 087 for (exid = 0 ; exid < SOS_EXCEPT_NUM ; exid ++) 104 { 088 { 105 /* Skip double fault (see below) */ 089 /* Skip double fault (see below) */ 106 if (exid == SOS_EXCEPT_DOUBLE_FAULT) 090 if (exid == SOS_EXCEPT_DOUBLE_FAULT) 107 continue; 091 continue; 108 092 109 retval = sos_exception_set_routine(exid, 093 retval = sos_exception_set_routine(exid, sos_generic_ex); 110 if (SOS_OK != retval) 094 if (SOS_OK != retval) 111 return retval; 095 return retval; 112 } 096 } 113 097 114 098 115 /* We inidicate that the double fault except 099 /* We inidicate that the double fault exception handler is defined, 116 and give its address. this handler is a d 100 and give its address. this handler is a do-nothing handler (see 117 exception_wrappers.S), and it can NOT be 101 exception_wrappers.S), and it can NOT be overriden by the 118 functions below */ 102 functions below */ 119 return sos_idt_set_handler(SOS_EXCEPT_BASE + 103 return sos_idt_set_handler(SOS_EXCEPT_BASE + SOS_EXCEPT_DOUBLE_FAULT, 120 (sos_vaddr_t) sos_ 104 (sos_vaddr_t) sos_exception_wrapper_array[SOS_EXCEPT_DOUBLE_FAULT], 121 0 /* CPL0 routine 105 0 /* CPL0 routine */); 122 } 106 } 123 107 124 108 125 sos_ret_t sos_exception_set_routine(int except 109 sos_ret_t sos_exception_set_routine(int exception_number, 126 sos_except 110 sos_exception_handler_t routine) 127 { 111 { 128 sos_ret_t retval; 112 sos_ret_t retval; 129 sos_ui32_t flags; 113 sos_ui32_t flags; 130 114 131 if ((exception_number < 0) || (exception_num 115 if ((exception_number < 0) || (exception_number >= SOS_EXCEPT_NUM)) 132 return -SOS_EINVAL; 116 return -SOS_EINVAL; 133 117 134 /* Double fault not supported */ 118 /* Double fault not supported */ 135 if (exception_number == SOS_EXCEPT_DOUBLE_FA 119 if (exception_number == SOS_EXCEPT_DOUBLE_FAULT) 136 return -SOS_ENOSUP; 120 return -SOS_ENOSUP; 137 121 138 sos_disable_IRQs(flags); 122 sos_disable_IRQs(flags); 139 123 140 retval = SOS_OK; 124 retval = SOS_OK; 141 125 142 /* Set the exception routine to be called by 126 /* Set the exception routine to be called by the exception wrapper */ 143 sos_exception_handler_array[exception_number 127 sos_exception_handler_array[exception_number] = routine; 144 128 145 /* If the exception is to be enabled, update 129 /* If the exception is to be enabled, update the IDT with the exception 146 wrapper */ 130 wrapper */ 147 if (routine != NULL) 131 if (routine != NULL) 148 retval 132 retval 149 = sos_idt_set_handler(SOS_EXCEPT_BASE + 133 = sos_idt_set_handler(SOS_EXCEPT_BASE + exception_number, 150 (sos_vaddr_t) sos_ 134 (sos_vaddr_t) sos_exception_wrapper_array[exception_number], 151 0 /* CPL0 routine 135 0 /* CPL0 routine */); 152 else /* Disable the IDT entry */ 136 else /* Disable the IDT entry */ 153 retval 137 retval 154 = sos_idt_set_handler(SOS_EXCEPT_BASE + 138 = sos_idt_set_handler(SOS_EXCEPT_BASE + exception_number, 155 (sos_vaddr_t)NULL 139 (sos_vaddr_t)NULL /* No routine => disable IDTE */, 156 0 /* don't care */ 140 0 /* don't care */); 157 141 158 sos_restore_IRQs(flags); 142 sos_restore_IRQs(flags); 159 return retval; 143 return retval; 160 } 144 } 161 145 162 146 163 sos_exception_handler_t sos_exception_get_rout 147 sos_exception_handler_t sos_exception_get_routine(int exception_number) 164 { 148 { 165 if ((exception_number < 0) || (exception_num 149 if ((exception_number < 0) || (exception_number >= SOS_EXCEPT_NUM)) 166 return NULL; 150 return NULL; 167 151 168 /* Double fault not supported */ 152 /* Double fault not supported */ 169 if (exception_number == SOS_EXCEPT_DOUBLE_FA 153 if (exception_number == SOS_EXCEPT_DOUBLE_FAULT) 170 return NULL; 154 return NULL; 171 155 172 /* Expected to be atomic */ 156 /* Expected to be atomic */ 173 return sos_exception_handler_array[exception 157 return sos_exception_handler_array[exception_number]; 174 } 158 } 175 159 176 160 177 const char * sos_exception_get_name(int except 161 const char * sos_exception_get_name(int exception_number) 178 { 162 { 179 if ((exception_number < 0) || (exception_num 163 if ((exception_number < 0) || (exception_number >= SOS_EXCEPT_NUM)) 180 return NULL; 164 return NULL; 181 165 182 return sos_x86_exnames[exception_number]; 166 return sos_x86_exnames[exception_number]; 183 } 167 }
| [ source navigation ] | [ diff markup ] | [ identifier search ] | [ general search ] |