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fix segfault from stack corruption in ahbap_debugport_init 

ahbap_debugport_init was queueing reads to a local stack variable but
didn't execute the queue before returning. Since the result of the reads
are not used anyway, it's better to pass NULL as the destination instead of
a dummy variable. I changed this throughout the function, even for the
reads that were actually executed.

Signed-off-by: Andreas Fritiofson <andreas.fritiofson@gmail.com>

Signed-off-by: Spencer Oliver <ntfreak@users.sourceforge.net>
This commit is contained in:
Andreas Fritiofson 2011-01-26 12:13:14 +00:00 committed by Spencer Oliver
parent a727418184
commit 5b34018ccd
1 changed files with 4 additions and 5 deletions
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9
src/target/arm_adi_v5.c
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@ -906,7 +906,6 @@ extern const struct dap_ops jtag_dp_ops;
*/
int ahbap_debugport_init(struct adiv5_dap *dap)
{
uint32_t dummy;
uint32_t ctrlstat;
int cnt = 0;
int retval;
@ -931,7 +930,7 @@ int ahbap_debugport_init(struct adiv5_dap *dap)
/* DP initialization */
retval = dap_queue_dp_read(dap, DP_CTRL_STAT, &dummy);
retval = dap_queue_dp_read(dap, DP_CTRL_STAT, NULL);
if (retval != ERROR_OK)
return retval;
@ -939,7 +938,7 @@ int ahbap_debugport_init(struct adiv5_dap *dap)
if (retval != ERROR_OK)
return retval;
retval = dap_queue_dp_read(dap, DP_CTRL_STAT, &dummy);
retval = dap_queue_dp_read(dap, DP_CTRL_STAT, NULL);
if (retval != ERROR_OK)
return retval;
@ -977,7 +976,7 @@ int ahbap_debugport_init(struct adiv5_dap *dap)
alive_sleep(10);
}
retval = dap_queue_dp_read(dap, DP_CTRL_STAT, &dummy);
retval = dap_queue_dp_read(dap, DP_CTRL_STAT, NULL);
if (retval != ERROR_OK)
return retval;
/* With debug power on we can activate OVERRUN checking */
@ -985,7 +984,7 @@ int ahbap_debugport_init(struct adiv5_dap *dap)
retval = dap_queue_dp_write(dap, DP_CTRL_STAT, dap->dp_ctrl_stat);
if (retval != ERROR_OK)
return retval;
retval = dap_queue_dp_read(dap, DP_CTRL_STAT, &dummy);
retval = dap_queue_dp_read(dap, DP_CTRL_STAT, NULL);
if (retval != ERROR_OK)
return retval;