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fix segfault from stack corruption in ahbap_debugport_init

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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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src/target/arm_adi_v5.c
+4 -5
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@@ -906,7 +906,6 @@ extern const struct dap_ops jtag_dp_ops;
*/ */
int ahbap_debugport_init(struct adiv5_dap *dap) int ahbap_debugport_init(struct adiv5_dap *dap)
{ {
uint32_t dummy;
uint32_t ctrlstat; uint32_t ctrlstat;
int cnt = 0; int cnt = 0;
int retval; int retval;
@@ -931,7 +930,7 @@ int ahbap_debugport_init(struct adiv5_dap *dap)
/* DP initialization */ /* 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) if (retval != ERROR_OK)
return retval; return retval;
@@ -939,7 +938,7 @@ int ahbap_debugport_init(struct adiv5_dap *dap)
if (retval != ERROR_OK) if (retval != ERROR_OK)
return retval; 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) if (retval != ERROR_OK)
return retval; return retval;
@@ -977,7 +976,7 @@ int ahbap_debugport_init(struct adiv5_dap *dap)
alive_sleep(10); 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) if (retval != ERROR_OK)
return retval; return retval;
/* With debug power on we can activate OVERRUN checking */ /* 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); retval = dap_queue_dp_write(dap, DP_CTRL_STAT, dap->dp_ctrl_stat);
if (retval != ERROR_OK) if (retval != ERROR_OK)
return retval; 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) if (retval != ERROR_OK)
return retval; return retval;