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