From 02192f6b8c63d740a551e371441d85d59930e65c Mon Sep 17 00:00:00 2001 From: Stefan Mahr Date: Sat, 9 Mar 2013 17:50:54 +0100 Subject: [PATCH] jtag: opendous: fix tap buffer overflow Appending bits to TAP buffer doesn't check if there's enough space left. This patch adds this check to fix TAP overflow error. Change-Id: If80d5ab4a24983ad24f3cab31f9676d1590ebf5d Signed-off-by: Stefan Mahr Reviewed-on: http://openocd.zylin.com/1216 Tested-by: jenkins Reviewed-by: Spencer Oliver --- src/jtag/drivers/opendous.c | 5 ++++- 1 file changed, 4 insertions(+), 1 deletion(-) diff --git a/src/jtag/drivers/opendous.c b/src/jtag/drivers/opendous.c index b13cbe05..efb6cf25 100644 --- a/src/jtag/drivers/opendous.c +++ b/src/jtag/drivers/opendous.c @@ -482,8 +482,9 @@ void opendous_tap_init(void) void opendous_tap_ensure_space(int scans, int bits) { int available_scans = MAX_PENDING_SCAN_RESULTS - pending_scan_results_length; + int available_bits = OPENDOUS_TAP_BUFFER_SIZE / 2 - tap_length; - if (scans > available_scans) + if ((scans > available_scans) || (bits > available_bits)) opendous_tap_execute(); } @@ -493,6 +494,8 @@ void opendous_tap_append_step(int tms, int tdi) unsigned char _tms = tms ? 1 : 0; unsigned char _tdi = tdi ? 1 : 0; + opendous_tap_ensure_space(0, 1); + int tap_index = tap_length / 4; int bits = (tap_length % 4) * 2; -- 2.39.5