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cortex_m: dwt_num_comp should be set to zero in cortex_m_dwt_free() 

A segmentation fault in cortex_m_endreset_event() is sometimes raised
with very broken target like Kinetis Kx with erased flash and active WDOG.
Debugging revealed that cortex_m->dwt_num_comp is 4 and
dwt_list is NULL at cortex_m:290

Change-Id: I229c59d6da13d816df513d1dbb19968e4b5951e2
Signed-off-by: Tomas Vanek <vanekt@fbl.cz>
Reviewed-on: http://openocd.zylin.com/2989
Reviewed-by: Thomas Schmid <thomas@rfranging.com>
Tested-by: jenkins
Reviewed-by: Paul Fertser <fercerpav@gmail.com>
This commit is contained in:
Tomas Vanek 2015-10-01 19:17:41 +02:00 committed by Freddie Chopin
parent cd94cdcd88
commit 3f0aef4272
1 changed files with 1 additions and 0 deletions
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src/target/cortex_m.c
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@ -1865,6 +1865,7 @@ static void cortex_m_dwt_free(struct target *target)
free(cm->dwt_comparator_list);
cm->dwt_comparator_list = NULL;
cm->dwt_num_comp = 0;
if (cache) {
register_unlink_cache(&target->reg_cache, cache);