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

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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.

Signed-off-by: Jason Wessel <jason.wessel@windriver.com>
This commit is contained in:
Jason Wessel 2010-08-05 09:22:25 -05:00
parent df4939350b
commit 3fa43aba08
1 changed files with 2 additions and 0 deletions
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2
kernel/debug/debug_core.c
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@ -605,6 +605,8 @@ cpu_master_loop:
if (dbg_kdb_mode) {
kgdb_connected = 1;
error = kdb_stub(ks);
if (error == -1)
continue;
kgdb_connected = 0;
} else {
error = gdb_serial_stub(ks);