static int
kdb_alt_break_internal(int key, int *state, int force_gdb)
{
int brk;
if (!kdb_alt_break_to_debugger)
return (0);
brk = kdb_alt_break_state(key, state);
switch (brk) {
case KDB_REQ_DEBUGGER:
if (force_gdb)
kdb_dbbe_select("gdb");
kdb_enter(KDB_WHY_BREAK, "Break to debugger");
break;
case KDB_REQ_PANIC:
if (force_gdb)
kdb_dbbe_select("gdb");
kdb_panic("Panic sequence on console");
break;
case KDB_REQ_REBOOT:
kdb_reboot();
break;
}
return (0);
}
static int
dcons_check_break(struct dcons_softc *dc, int c)
{
int kdb_brk;
if (c < 0)
return (c);
if ((kdb_brk = kdb_alt_break(c, &dc->brk_state)) != 0) {
switch (kdb_brk) {
case KDB_REQ_DEBUGGER:
if ((dc->flags & DC_GDB) != 0) {
#ifdef GDB
if (gdb_cur == &dcons_gdb_dbgport) {
kdb_dbbe_select("gdb");
kdb_enter(KDB_WHY_BREAK,
"Break sequence on dcons gdb port");
}
#endif
} else
kdb_enter(KDB_WHY_BREAK,
"Break sequence on dcons console port");
break;
case KDB_REQ_PANIC:
kdb_panic("Panic sequence on dcons console port");
break;
case KDB_REQ_REBOOT:
kdb_reboot();
break;
}
}
return (c);
}
static int
kdb_sysctl_current(SYSCTL_HANDLER_ARGS)
{
char buf[16];
int error;
if (kdb_dbbe != NULL)
strlcpy(buf, kdb_dbbe->dbbe_name, sizeof(buf));
else
*buf = '\0';
error = sysctl_handle_string(oidp, buf, sizeof(buf), req);
if (error != 0 || req->newptr == NULL)
return (error);
if (kdb_active)
return (EBUSY);
return (kdb_dbbe_select(buf));
}
static int
gdb_getc(void)
{
int c;
do
c = gdb_cur->gdb_getc();
while (c == -1);
if (c == CTRL('C')) {
printf("Received ^C; trying to switch back to ddb.\n");
if (kdb_dbbe_select("ddb") != 0)
printf("The ddb backend could not be selected.\n");
else {
printf("using longjmp, hope it works!\n");
kdb_reenter();
}
}
return (c);
}
