Hello again!
Another kernel crash. The console was running at that time, so perhaps
I missed some messages.
The kernel debugger (Ctrl-Alt-d), however, offered the following to me:
#v+
Stopped at 0x17673a: ret
db> trace
0x17673a(0)
Kernel page fault at address 0x30, eip = 0x16ef1c
Kernel page fault trap, eip 0x16ef1c
Caught Page fault (14), code = 0, pc = 16ef1c
#v-
#v+
$ addr2line -fe gnumach 0x17673a 0x16ef1c
spl0
i386/i386/spl.S:92
db_nextframe
i386/i386/db_trace.c:273
#v-
#v+
$ cat -n i386/i386/spl.S | grep -C 10 ^\ \ \ \ 92
82 1:
83 cmpl $(SPL0),EXT(curr_ipl) /* are we at spl0? */
84 je 1f /* yes, all done */
85 movl $(SPL0),EXT(curr_ipl) /* set ipl */
86 movl EXT(pic_mask)+SPL0*4,%eax
87 /* get PIC mask */
88 SETMASK() /* program PICs with new mask */
89 1:
90 sti /* enable interrupts */
91 popl %eax /* return previous mask */
92 ret
93
94 Entry(splsoftclock)
95 ENTRY(spl1)
96 SETIPL(SPL1)
97
98 ENTRY(spl2)
99 SETIPL(SPL2)
100
101 ENTRY(spl3)
102 SETIPL(SPL3)
#v-
#v+
$ cat -n i386/i386/db_trace.c | grep -C 10 ^\ \ \ 273
263 task_t task = (thread != THREAD_NULL)? thread->task: TASK_NULL;
264
265 switch(frame_type) {
266 case TRAP:
267 /*
268 * We know that trap() has 1 argument and we know that
269 * it is an (struct i386_saved_state *).
270 */
271 saved_regs = (struct i386_saved_state *)
272
db_get_task_value((int)&((*fp)->f_arg0),4,FALSE,task);
273 db_printf(">>>>> %s (%d) at ",
274 trap_name(saved_regs->trapno),
saved_regs->trapno);
275 db_task_printsym(saved_regs->eip, DB_STGY_PROC, task);
276 db_printf(" <<<<<\n");
277 *fp = (struct i386_frame *)saved_regs->ebp;
278 *ip = (db_addr_t)saved_regs->eip;
279 break;
280 case INTERRUPT:
281 if (*lfp == 0) {
282 db_printf(">>>>> interrupt <<<<<\n");
283 goto miss_frame;
#v-
Regards,
Thomas
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