debug_core,kdb: fix crash when arch does not have single step

When an arch such as mips and microblaze does not implement either HW or software single stepping the debug core should re-enter kdb. The kdb code will properly ignore the single step operation. Attempting to single step the kernel without software or hardware support causes unpredictable kernel crashes.

Jason Wessel committed 16 years ago

Commit 3fa43ab1 parent df493931 file · +2 −0Browse files

Unified · Split

kernel/debug/debug_core.c+2−0

@@ -605,6 +605,8 @@ cpu_master_loop: · 604 unmodified lines
605	605	if (dbg_kdb_mode) {
606	606	kgdb_connected = 1;
607	607	error = kdb_stub(ks);
	608	+ if (error == -1)
	609	+ continue;
608	610	kgdb_connected = 0;
609	611	} else {
610	612	error = gdb_serial_stub(ks);