Diff markup
001 001
002 <<
003 002
004 003
005 004
006 005
007 006
008 007
009 008
010 009
011 010
012 011
013 012
014 013
015 014
016 015
017 016
018 017
019 #include "idt.h" 018 #include "idt.h"
020 #include "irq.h" 019 #include "irq.h"
021 020
>> 021 #include <sos/assert.h>
>> 022 #include <drivers/bochs.h>
>> 023 #include <sos/thread.h>
>> 024
022 #include "exception.h" 025 #include "exception.h"
023 026
024 027
025 extern sos_vaddr_t sos_exception_wrapper_array 028 extern sos_vaddr_t sos_exception_wrapper_array[SOS_EXCEPT_NUM];
026 029
027 030
028 sos_exception_handler_t sos_exception_handler_ 031 sos_exception_handler_t sos_exception_handler_array[SOS_EXCEPT_NUM] =
029 { NULL, }; 032 { NULL, };
030 033
031 sos_ret_t sos_exceptions_setup(void) !! 034
>> 035 static const char * sos_x86_exnames[] = {
>> 036 [SOS_EXCEPT_DIVIDE_ERROR] = "Division by zero",
>> 037 [SOS_EXCEPT_DEBUG] = "Debug",
>> 038 [SOS_EXCEPT_NMI_INTERRUPT] = "Non Maskable Interrupt",
>> 039 [SOS_EXCEPT_BREAKPOINT] = "Breakpoint",
>> 040 [SOS_EXCEPT_OVERFLOW] = "Overflow",
>> 041 [SOS_EXCEPT_BOUND_RANGE_EXCEDEED] = "Bound Range Exceeded",
>> 042 [SOS_EXCEPT_INVALID_OPCODE] = "Invalid Opcode",
>> 043 [SOS_EXCEPT_DEVICE_NOT_AVAILABLE] = "Device Unavailable",
>> 044 [SOS_EXCEPT_DOUBLE_FAULT] = "Double Fault",
>> 045 [SOS_EXCEPT_COPROCESSOR_SEGMENT_OVERRUN] = "Coprocessor Segment Overrun",
>> 046 [SOS_EXCEPT_INVALID_TSS] = "Invalid TSS",
>> 047 [SOS_EXCEPT_SEGMENT_NOT_PRESENT] = "Segment Not Present",
>> 048 [SOS_EXCEPT_STACK_SEGMENT_FAULT] = "Stack Segfault",
>> 049 [SOS_EXCEPT_GENERAL_PROTECTION] = "General Protection",
>> 050 [SOS_EXCEPT_PAGE_FAULT] = "Page Fault",
>> 051 [SOS_EXCEPT_INTEL_RESERVED_1] = "INTEL1",
>> 052 [SOS_EXCEPT_FLOATING_POINT_ERROR] = "FP Error",
>> 053 [SOS_EXCEPT_ALIGNEMENT_CHECK] = "Alignment Check",
>> 054 [SOS_EXCEPT_MACHINE_CHECK] = "Machine Check",
>> 055 [SOS_EXCEPT_INTEL_RESERVED_2] = "INTEL2",
>> 056 [SOS_EXCEPT_INTEL_RESERVED_3] = "INTEL3",
>> 057 [SOS_EXCEPT_INTEL_RESERVED_4] = "INTEL4",
>> 058 [SOS_EXCEPT_INTEL_RESERVED_5] = "INTEL5",
>> 059 [SOS_EXCEPT_INTEL_RESERVED_6] = "INTEL6",
>> 060 [SOS_EXCEPT_INTEL_RESERVED_7] = "INTEL7",
>> 061 [SOS_EXCEPT_INTEL_RESERVED_8] = "INTEL8",
>> 062 [SOS_EXCEPT_INTEL_RESERVED_9] = "INTEL9",
>> 063 [SOS_EXCEPT_INTEL_RESERVED_10] = "INTEL10",
>> 064 [SOS_EXCEPT_INTEL_RESERVED_11] = "INTEL11",
>> 065 [SOS_EXCEPT_INTEL_RESERVED_12] = "INTEL12",
>> 066 [SOS_EXCEPT_INTEL_RESERVED_13] = "INTEL13",
>> 067 [SOS_EXCEPT_INTEL_RESERVED_14] = "INTEL14"
>> 068 };
>> 069
>> 070
>> 071
>> 072 static void sos_generic_ex(int exid, struct sos_cpu_state *ctxt)
>> 073 __attribute__((noreturn));
>> 074 static void sos_generic_ex(int exid, struct sos_cpu_state *ctxt)
>> 075 {
>> 076 const char *exname = sos_exception_get_name(exid);
>> 077
>> 078 if (sos_cpu_context_is_in_user_mode(ctxt))
>> 079 {
>> 080
>> 081 sos_bochs_printf("Exception %s in User mode at instruction 0x%x (info=%x)!\n",
>> 082 exname,
>> 083 sos_cpu_context_get_PC(ctxt),
>> 084 (unsigned)sos_cpu_context_get_EX_info(ctxt));
>> 085 sos_bochs_printf("Terminating User thread\n");
>> 086 sos_thread_exit();
>> 087 }
>> 088 else
>> 089 sos_display_fatal_error("Exception %s in Kernel at instruction 0x%x (info=%x)!\n",
>> 090 exname,
>> 091 sos_cpu_context_get_PC(ctxt),
>> 092 (unsigned)sos_cpu_context_get_EX_info(ctxt));
>> 093 }
>> 094
>> 095
>> 096 sos_ret_t sos_exception_subsystem_setup(void)
032 { 097 {
033 return SOS_OK; !! 098 sos_ret_t retval;
>> 099 int exid;
>> 100
>> 101
>> 102
>> 103 for (exid = 0 ; exid < SOS_EXCEPT_NUM ; exid ++)
>> 104 {
>> 105
>> 106 if (exid == SOS_EXCEPT_DOUBLE_FAULT)
>> 107 continue;
>> 108
>> 109 retval = sos_exception_set_routine(exid, sos_generic_ex);
>> 110 if (SOS_OK != retval)
>> 111 return retval;
>> 112 }
>> 113
>> 114
>> 115
>> 116
>> 117
>> 118
>> 119 return sos_idt_set_handler(SOS_EXCEPT_BASE + SOS_EXCEPT_DOUBLE_FAULT,
>> 120 (sos_vaddr_t) sos_exception_wrapper_array[SOS_EXCEPT_DOUBLE_FAULT],
>> 121 0 );
034 } 122 }
035 123
036 124
037 sos_ret_t sos_exception_set_routine(int except 125 sos_ret_t sos_exception_set_routine(int exception_number,
038 sos_except 126 sos_exception_handler_t routine)
039 { 127 {
040 sos_ret_t retval; 128 sos_ret_t retval;
041 sos_ui32_t flags; 129 sos_ui32_t flags;
042 130
043 if ((exception_number < 0) || (exception_num 131 if ((exception_number < 0) || (exception_number >= SOS_EXCEPT_NUM))
044 return -SOS_EINVAL; 132 return -SOS_EINVAL;
045 133
046 134
047 if (exception_number == SOS_EXCEPT_DOUBLE_FA 135 if (exception_number == SOS_EXCEPT_DOUBLE_FAULT)
048 return -SOS_ENOSUP; 136 return -SOS_ENOSUP;
049 137
050 sos_disable_IRQs(flags); 138 sos_disable_IRQs(flags);
051 139
052 retval = SOS_OK; 140 retval = SOS_OK;
053 141
054 142
055 sos_exception_handler_array[exception_number 143 sos_exception_handler_array[exception_number] = routine;
056 144
057 145
058 146
059 if (routine != NULL) 147 if (routine != NULL)
060 retval 148 retval
061 = sos_idt_set_handler(SOS_EXCEPT_BASE + 149 = sos_idt_set_handler(SOS_EXCEPT_BASE + exception_number,
062 (sos_vaddr_t) sos_ 150 (sos_vaddr_t) sos_exception_wrapper_array[exception_number],
063 0 151 0 );
064 else 152 else
065 retval 153 retval
066 = sos_idt_set_handler(SOS_EXCEPT_BASE + 154 = sos_idt_set_handler(SOS_EXCEPT_BASE + exception_number,
067 (sos_vaddr_t)NULL 155 (sos_vaddr_t)NULL ,
068 0 156 0 );
069 157
070 sos_restore_IRQs(flags); 158 sos_restore_IRQs(flags);
071 return retval; 159 return retval;
072 } 160 }
073 161
074 162
075 sos_exception_handler_t sos_exception_get_rout 163 sos_exception_handler_t sos_exception_get_routine(int exception_number)
076 { 164 {
077 if ((exception_number < 0) || (exception_num 165 if ((exception_number < 0) || (exception_number >= SOS_EXCEPT_NUM))
078 return NULL; 166 return NULL;
079 167
080 168
081 if (exception_number == SOS_EXCEPT_DOUBLE_FA 169 if (exception_number == SOS_EXCEPT_DOUBLE_FAULT)
082 return NULL; 170 return NULL;
083 171
084 172
085 return sos_exception_handler_array[exception 173 return sos_exception_handler_array[exception_number];
>> 174 }
>> 175
>> 176
>> 177 const char * sos_exception_get_name(int exception_number)
>> 178 {
>> 179 if ((exception_number < 0) || (exception_number >= SOS_EXCEPT_NUM))
>> 180 return NULL;
>> 181
>> 182 return sos_x86_exnames[exception_number];
086 } 183 }