Diff markup
001 001
>> 002
002 003
003 004
004 005
005 006
006 007
007 008
008 009
009 010
010 011
011 012
012 013
013 014
014 015
015 016
016 017
017 018
018 #include "idt.h" 019 #include "idt.h"
019 #include "irq.h" 020 #include "irq.h"
020 021
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
027 024
028 extern sos_vaddr_t sos_exception_wrapper_array 025 extern sos_vaddr_t sos_exception_wrapper_array[SOS_EXCEPT_NUM];
029 026
030 027
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 !! 031 sos_ret_t sos_exceptions_setup(void)
035 static const char * sos_x86_exnames[] = { <<
036 [SOS_EXCEPT_DIVIDE_ERROR] = " <<
037 [SOS_EXCEPT_DEBUG] = " <<
038 [SOS_EXCEPT_NMI_INTERRUPT] = " <<
039 [SOS_EXCEPT_BREAKPOINT] = " <<
040 [SOS_EXCEPT_OVERFLOW] = " <<
041 [SOS_EXCEPT_BOUND_RANGE_EXCEDEED] = " <<
042 [SOS_EXCEPT_INVALID_OPCODE] = " <<
043 [SOS_EXCEPT_DEVICE_NOT_AVAILABLE] = " <<
044 [SOS_EXCEPT_DOUBLE_FAULT] = " <<
045 [SOS_EXCEPT_COPROCESSOR_SEGMENT_OVERRUN] = " <<
046 [SOS_EXCEPT_INVALID_TSS] = " <<
047 [SOS_EXCEPT_SEGMENT_NOT_PRESENT] = " <<
048 [SOS_EXCEPT_STACK_SEGMENT_FAULT] = " <<
049 [SOS_EXCEPT_GENERAL_PROTECTION] = " <<
050 [SOS_EXCEPT_PAGE_FAULT] = " <<
051 [SOS_EXCEPT_INTEL_RESERVED_1] = " <<
052 [SOS_EXCEPT_FLOATING_POINT_ERROR] = " <<
053 [SOS_EXCEPT_ALIGNEMENT_CHECK] = " <<
054 [SOS_EXCEPT_MACHINE_CHECK] = " <<
055 [SOS_EXCEPT_INTEL_RESERVED_2] = " <<
056 [SOS_EXCEPT_INTEL_RESERVED_3] = " <<
057 [SOS_EXCEPT_INTEL_RESERVED_4] = " <<
058 [SOS_EXCEPT_INTEL_RESERVED_5] = " <<
059 [SOS_EXCEPT_INTEL_RESERVED_6] = " <<
060 [SOS_EXCEPT_INTEL_RESERVED_7] = " <<
061 [SOS_EXCEPT_INTEL_RESERVED_8] = " <<
062 [SOS_EXCEPT_INTEL_RESERVED_9] = " <<
063 [SOS_EXCEPT_INTEL_RESERVED_10] = " <<
064 [SOS_EXCEPT_INTEL_RESERVED_11] = " <<
065 [SOS_EXCEPT_INTEL_RESERVED_12] = " <<
066 [SOS_EXCEPT_INTEL_RESERVED_13] = " <<
067 [SOS_EXCEPT_INTEL_RESERVED_14] = " <<
068 }; <<
069 <<
070 <<
071 <<
072 static void sos_generic_ex(int exid, struct so <<
073 { 032 {
074 const char *exname = sos_exception_get_name( !! 033 return SOS_OK;
075 <<
076 if (sos_cpu_context_is_in_user_mode(ctxt)) <<
077 { <<
078 <<
079 sos_bochs_printf("Exception %s in User m <<
080 exname, <<
081 sos_cpu_context_get_PC( <<
082 (unsigned)sos_cpu_conte <<
083 sos_bochs_printf("Terminating User threa <<
084 sos_thread_exit(); <<
085 } <<
086 else <<
087 sos_display_fatal_error("Exception %s in K <<
088 exname, <<
089 sos_cpu_context_ge <<
090 (unsigned)sos_cpu_ <<
091 } <<
092 <<
093 <<
094 sos_ret_t sos_exception_subsystem_setup(void) <<
095 { <<
096 sos_ret_t retval; <<
097 int exid; <<
098 <<
099 <<
100 <<
101 for (exid = 0 ; exid < SOS_EXCEPT_NUM ; exid <<
102 { <<
103 <<
104 if (exid == SOS_EXCEPT_DOUBLE_FAULT) <<
105 continue; <<
106 <<
107 retval = sos_exception_set_routine(exid, <<
108 if (SOS_OK != retval) <<
109 return retval; <<
110 } <<
111 <<
112 <<
113 <<
114 <<
115 <<
116 <<
117 return sos_idt_set_handler(SOS_EXCEPT_BASE + <<
118 (sos_vaddr_t) sos_ <<
119 0 <<
120 } 034 }
121 035
122 036
123 sos_ret_t sos_exception_set_routine(int except 037 sos_ret_t sos_exception_set_routine(int exception_number,
124 sos_except 038 sos_exception_handler_t routine)
125 { 039 {
126 sos_ret_t retval; 040 sos_ret_t retval;
127 sos_ui32_t flags; 041 sos_ui32_t flags;
128 042
129 if ((exception_number < 0) || (exception_num 043 if ((exception_number < 0) || (exception_number >= SOS_EXCEPT_NUM))
130 return -SOS_EINVAL; 044 return -SOS_EINVAL;
131 045
132 046
133 if (exception_number == SOS_EXCEPT_DOUBLE_FA 047 if (exception_number == SOS_EXCEPT_DOUBLE_FAULT)
134 return -SOS_ENOSUP; 048 return -SOS_ENOSUP;
135 049
136 sos_disable_IRQs(flags); 050 sos_disable_IRQs(flags);
137 051
138 retval = SOS_OK; 052 retval = SOS_OK;
139 053
140 054
141 sos_exception_handler_array[exception_number 055 sos_exception_handler_array[exception_number] = routine;
142 056
143 057
144 058
145 if (routine != NULL) 059 if (routine != NULL)
146 retval 060 retval
147 = sos_idt_set_handler(SOS_EXCEPT_BASE + 061 = sos_idt_set_handler(SOS_EXCEPT_BASE + exception_number,
148 (sos_vaddr_t) sos_ 062 (sos_vaddr_t) sos_exception_wrapper_array[exception_number],
149 0 063 0 );
150 else 064 else
151 retval 065 retval
152 = sos_idt_set_handler(SOS_EXCEPT_BASE + 066 = sos_idt_set_handler(SOS_EXCEPT_BASE + exception_number,
153 (sos_vaddr_t)NULL 067 (sos_vaddr_t)NULL ,
154 0 068 0 );
155 069
156 sos_restore_IRQs(flags); 070 sos_restore_IRQs(flags);
157 return retval; 071 return retval;
158 } 072 }
159 073
160 074
161 sos_exception_handler_t sos_exception_get_rout 075 sos_exception_handler_t sos_exception_get_routine(int exception_number)
162 { 076 {
163 if ((exception_number < 0) || (exception_num 077 if ((exception_number < 0) || (exception_number >= SOS_EXCEPT_NUM))
164 return NULL; 078 return NULL;
165 079
166 080
167 if (exception_number == SOS_EXCEPT_DOUBLE_FA 081 if (exception_number == SOS_EXCEPT_DOUBLE_FAULT)
168 return NULL; 082 return NULL;
169 083
170 084
171 return sos_exception_handler_array[exception 085 return sos_exception_handler_array[exception_number];
172 } <<
173 <<
174 <<
175 const char * sos_exception_get_name(int except <<
176 { <<
177 if ((exception_number < 0) || (exception_num <<
178 return NULL; <<
179 <<
180 return sos_x86_exnames[exception_number]; <<
181 } 086 }