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 __attribute__((noreturn)); <<
074 static void sos_generic_ex(int exid, struct so <<
075 { <<
076 const char *exname = sos_exception_get_name( <<
077 <<
078 if (sos_cpu_context_is_in_user_mode(ctxt)) <<
079 { <<
080 <<
081 sos_bochs_printf("Exception %s in User m <<
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 } <<
094 <<
095 <<
096 sos_ret_t sos_exception_subsystem_setup(void) <<
097 { 032 {
098 sos_ret_t retval; !! 033 return SOS_OK;
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, <<
110 if (SOS_OK != retval) <<
111 return retval; <<
112 } <<
113 <<
114 <<
115 <<
116 <<
117 <<
118 <<
119 return sos_idt_set_handler(SOS_EXCEPT_BASE + <<
120 (sos_vaddr_t) sos_ <<
121 0 <<
122 } 034 }
123 035
124 036
125 sos_ret_t sos_exception_set_routine(int except 037 sos_ret_t sos_exception_set_routine(int exception_number,
126 sos_except 038 sos_exception_handler_t routine)
127 { 039 {
128 sos_ret_t retval; 040 sos_ret_t retval;
129 sos_ui32_t flags; 041 sos_ui32_t flags;
130 042
131 if ((exception_number < 0) || (exception_num 043 if ((exception_number < 0) || (exception_number >= SOS_EXCEPT_NUM))
132 return -SOS_EINVAL; 044 return -SOS_EINVAL;
133 045
134 046
135 if (exception_number == SOS_EXCEPT_DOUBLE_FA 047 if (exception_number == SOS_EXCEPT_DOUBLE_FAULT)
136 return -SOS_ENOSUP; 048 return -SOS_ENOSUP;
137 049
138 sos_disable_IRQs(flags); 050 sos_disable_IRQs(flags);
139 051
140 retval = SOS_OK; 052 retval = SOS_OK;
141 053
142 054
143 sos_exception_handler_array[exception_number 055 sos_exception_handler_array[exception_number] = routine;
144 056
145 057
146 058
147 if (routine != NULL) 059 if (routine != NULL)
148 retval 060 retval
149 = sos_idt_set_handler(SOS_EXCEPT_BASE + 061 = sos_idt_set_handler(SOS_EXCEPT_BASE + exception_number,
150 (sos_vaddr_t) sos_ 062 (sos_vaddr_t) sos_exception_wrapper_array[exception_number],
151 0 063 0 );
152 else 064 else
153 retval 065 retval
154 = sos_idt_set_handler(SOS_EXCEPT_BASE + 066 = sos_idt_set_handler(SOS_EXCEPT_BASE + exception_number,
155 (sos_vaddr_t)NULL 067 (sos_vaddr_t)NULL ,
156 0 068 0 );
157 069
158 sos_restore_IRQs(flags); 070 sos_restore_IRQs(flags);
159 return retval; 071 return retval;
160 } 072 }
161 073
162 074
163 sos_exception_handler_t sos_exception_get_rout 075 sos_exception_handler_t sos_exception_get_routine(int exception_number)
164 { 076 {
165 if ((exception_number < 0) || (exception_num 077 if ((exception_number < 0) || (exception_number >= SOS_EXCEPT_NUM))
166 return NULL; 078 return NULL;
167 079
168 080
169 if (exception_number == SOS_EXCEPT_DOUBLE_FA 081 if (exception_number == SOS_EXCEPT_DOUBLE_FAULT)
170 return NULL; 082 return NULL;
171 083
172 084
173 return sos_exception_handler_array[exception 085 return sos_exception_handler_array[exception_number];
174 } <<
175 <<
176 <<
177 const char * sos_exception_get_name(int except <<
178 { <<
179 if ((exception_number < 0) || (exception_num <<
180 return NULL; <<
181 <<
182 return sos_x86_exnames[exception_number]; <<
183 } 086 }