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26 | * THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE. |
26 | * THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE. |
27 | */ |
27 | */ |
28 | 28 | ||
29 | #include <interrupt.h> |
29 | #include <interrupt.h> |
30 | #include <debug.h> |
30 | #include <debug.h> |
- | 31 | #include <console/kconsole.h> |
|
- | 32 | #include <console/console.h> |
|
- | 33 | #include <console/chardev.h> |
|
- | 34 | #include <panic.h> |
|
- | 35 | #include <print.h> |
|
- | 36 | #include <symtab.h> |
|
31 | 37 | ||
32 | static struct { |
38 | static struct { |
33 | char *name; |
39 | const char *name; |
34 | iroutine f; |
40 | iroutine f; |
35 | } ivt[IVT_ITEMS]; |
41 | } exc_table[IVT_ITEMS]; |
36 | 42 | ||
- | 43 | static spinlock_t exctbl_lock; |
|
- | 44 | ||
- | 45 | /** Register exception handler |
|
- | 46 | * |
|
- | 47 | * @param n Exception number |
|
- | 48 | * @param name Description |
|
- | 49 | * @param f Exception handler |
|
- | 50 | */ |
|
37 | iroutine exc_register(int n, char *name, iroutine f) |
51 | iroutine exc_register(int n, const char *name, iroutine f) |
38 | { |
52 | { |
39 | ASSERT(n < IVT_ITEMS); |
53 | ASSERT(n < IVT_ITEMS); |
40 | 54 | ||
41 | iroutine old; |
55 | iroutine old; |
42 | 56 | ||
- | 57 | spinlock_lock(&exctbl_lock); |
|
- | 58 | ||
43 | old = ivt[n].f; |
59 | old = exc_table[n].f; |
44 | ivt[n].f = f; |
60 | exc_table[n].f = f; |
45 | ivt[n].name = name; |
61 | exc_table[n].name = name; |
- | 62 | ||
- | 63 | spinlock_unlock(&exctbl_lock); |
|
46 | 64 | ||
47 | return old; |
65 | return old; |
48 | } |
66 | } |
49 | 67 | ||
- | 68 | /** Dispatch exception according to exception table |
|
50 | /* |
69 | * |
51 | * Called directly from the assembler code. |
70 | * Called directly from the assembler code. |
52 | * CPU is interrupts_disable()'d. |
71 | * CPU is interrupts_disable()'d. |
53 | */ |
72 | */ |
54 | void exc_dispatch(int n, void *stack) |
73 | void exc_dispatch(int n, void *stack) |
55 | { |
74 | { |
56 | ASSERT(n < IVT_ITEMS); |
75 | ASSERT(n < IVT_ITEMS); |
57 | 76 | ||
58 | ivt[n].f(n, stack); |
77 | exc_table[n].f(n, stack); |
- | 78 | } |
|
- | 79 | ||
- | 80 | /** Default 'null' exception handler */ |
|
- | 81 | static void exc_undef(int n, void *stack) |
|
- | 82 | { |
|
- | 83 | panic("Unhandled exception %d.", n); |
|
- | 84 | } |
|
- | 85 | ||
- | 86 | /** KConsole cmd - print all exceptions */ |
|
- | 87 | static int exc_print_cmd(cmd_arg_t *argv) |
|
- | 88 | { |
|
- | 89 | int i; |
|
- | 90 | char *symbol; |
|
- | 91 | ||
- | 92 | spinlock_lock(&exctbl_lock); |
|
- | 93 | printf("Exc Handler Description\n"); |
|
- | 94 | for (i=0; i < IVT_ITEMS; i++) { |
|
- | 95 | symbol = get_symtab_entry((__native)exc_table[i].f); |
|
- | 96 | if (!symbol) |
|
- | 97 | symbol = "not found"; |
|
- | 98 | printf("%d %s 0x%p(%s)\n",i,exc_table[i].name, |
|
- | 99 | exc_table[i].f,symbol); |
|
- | 100 | if (!((i+1) % 20)) { |
|
- | 101 | printf("Press any key to continue."); |
|
- | 102 | getc(stdin); |
|
- | 103 | printf("\n"); |
|
- | 104 | } |
|
- | 105 | } |
|
- | 106 | spinlock_unlock(&exctbl_lock); |
|
- | 107 | ||
- | 108 | return 1; |
|
59 | } |
109 | } |
- | 110 | ||
- | 111 | static cmd_info_t exc_info = { |
|
- | 112 | .name = "exc_print", |
|
- | 113 | .description = "Print exception table", |
|
- | 114 | .func = exc_print_cmd, |
|
- | 115 | .help = NULL, |
|
- | 116 | .argc = 0, |
|
- | 117 | .argv = NULL |
|
- | 118 | }; |
|
- | 119 | ||
- | 120 | /** Initialize generic exception handling support */ |
|
- | 121 | void exc_init(void) |
|
- | 122 | { |
|
- | 123 | int i; |
|
- | 124 | ||
- | 125 | spinlock_initialize(&exctbl_lock, "exctbl_lock"); |
|
- | 126 | ||
- | 127 | for (i=0;i < IVT_ITEMS; i++) |
|
- | 128 | exc_register(i, "undef", exc_undef); |
|
- | 129 | ||
- | 130 | spinlock_initialize(&exc_info.lock, "kconsole_excinfo"); |
|
- | 131 | link_initialize(&exc_info.link); |
|
- | 132 | if (!cmd_register(&exc_info)) |
|
- | 133 | panic("could not register command %s\n", exc_info.name); |
|
- | 134 | } |
|
- | 135 |