To all,
I tried to used OpenOCD on my board with Atmel AT91SAM9263 with Amontec jtagkey
and it works great, only I had to *slow* it down to 5 kHz while
initialization. Even after PLL
setup, I still have to use slower clock, around 4MHz.
I couldn't make it to work with GDB. I was always getting this in GDB:
(gdb) target remote localhost:3333
Remote debugging using localhost:3333
Ignoring packet error, continuing...
Ignoring packet error, continuing...
Ignoring packet error, continuing...
Ignoring packet error, continuing...
Malformed response to offset query, timeout
(gdb)
And on a OpenOCD side (run with -d 3):
Warn : 727 600505 gdb_server.c:630 gdb_get_packet_inner():
acknowledgment received, but no packet pending
Warn : 728 601506 log.c:417 keep_alive(): keep_alive() was not invoked
in the 1000ms timelimit. GDB alive packet not sent! (1001).
Workaround: increase "set remotetimeout" in GDB
Debug: 730 602507 gdb_server.c:2670 gdb_input_inner(): received packet: '?'
Warn : 731 602507 gdb_server.c:630 gdb_get_packet_inner():
acknowledgment received, but no packet pending
Warn : 732 603509 log.c:417 keep_alive(): keep_alive() was not invoked
in the 1000ms timelimit. GDB alive packet not sent! (1001).
Workaround: increase "set remotetimeout" in GDB
Debug: 734 604509 gdb_server.c:2670 gdb_input_inner(): received packet: '?'
Warn : 735 604509 gdb_server.c:630 gdb_get_packet_inner():
acknowledgment received, but no packet pending
Warn : 736 605510 log.c:417 keep_alive(): keep_alive() was not invoked
in the 1000ms timelimit. GDB alive packet not sent! (1001).
Workaround: increase "set remotetimeout" in GDB
Debug: 738 606511 gdb_server.c:2670 gdb_input_inner(): received packet: '?'
Warn : 739 606511 gdb_server.c:630 gdb_get_packet_inner():
acknowledgment received, but no packet pending
After reading some documents about GDB protocol and studying the code
I believe I
have found the problem. My gdb is:
$ arm-linux-gdb -v
GNU gdb 6.8
While looking in the remote log file, i have seen that gdb responds with:
w ++$?#3f
And those two '+' seems to confuse the OpenOCD. I prepared the following patch
and it works for me with it:
diff --git a/src/server/gdb_server.c b/src/server/gdb_server.c
index 152a06c..b878826 100644
--- a/src/server/gdb_server.c
+++ b/src/server/gdb_server.c
@@ -626,11 +626,14 @@ static int gdb_get_packet_inner(struct
connection *connection,
* warning. This code makes
server ignore the first ACK
* that will be received after
going into noack mode,
* warning only about
subsequent ACK's. */
- if (gdb_con->noack_mode > 1) {
-
LOG_WARNING("acknowledgment received, but no packet pending");
- } else {
- LOG_DEBUG("Received
first acknowledgment after entering noack mode.
- gdb_con->noack_mode = 2;
+ if(gdb_con->noack_mode)
+ {
+ if (gdb_con->noack_mode > 1) {
+
LOG_WARNING("acknowledgment received, but no packet pending
+ } else {
+
LOG_DEBUG("Received first acknowledgment after entering noa
+ gdb_con->noack_mode = 2;
+ }
}
break;
case '-':
As you can see, if the parser sees another '+' sign it emits the DEBUG
output and sets the
noack_mode to 2. The problem is that we weren't even IN noack mode,
this was set to 0
and then it explicitly sets it to 2 and thus turning the noack mode on.
In the attachment is the gdb log file.
Please let me know what do you think.
Thank you and Best Regards,
Matej
w $qSupported#37
r ++$PacketSize=3fff;qXfer:memory-map:read+;qXfer:features:read+;QStartNoAckMode+#06
w +$qXfer:features:read:target.xml:0,fff#7d
r +$l<?xml version="1.0"?>\n<!DOCTYPE target SYSTEM "gdb-target.dtd">\n<target version="1.0">\n<feature name="org.gnu.gdb.arm.core">\n<reg name="r0" bitsize="32" regnum="0" save-restore="no" type="uint32" group="general"/>\n<reg name="r1" bitsize="32" regnum="1" save-restore="no" type="uint32" group="general"/>\n<reg name="r2" bitsize="32" regnum="2" save-restore="no" type="uint32" group="general"/>\n<reg name="r3" bitsize="32" regnum="3" save-restore="no" type="uint32" group="general"/>\n<reg name="r4" bitsize="32" regnum="4" save-restore="no" type="uint32" group="general"/>\n<reg name="r5" bitsize="32" regnum="5" save-restore="no" type="uint32" group="general"/>\n<reg name="r6" bitsize="32" regnum="6" save-restore="no" type="uint32" group="general"/>\n<reg name="r7" bitsize="32" regnum="7" save-restore="no" type="uint32" group="general"/>\n<reg name="r8" bitsize="32" regnum="8" save-restore="no" type="uint32" group="general"/>\n<reg name="r9" bitsize="32" regnum="9" save-restore="no" type="uint32" group="general"/>\n<reg name="r10" bitsize="32" regnum="10" save-restore="no" type="uint32" group="general"/>\n<reg name="r11" bitsize="32" regnum="11" save-restore="no" type="uint32" group="general"/>\n<reg name="r12" bitsize="32" regnum="12" save-restore="no" type="uint32" group="general"/>\n<reg name="sp" bitsize="32" regnum="13" save-restore="no" type="data_ptr" group="general"/>\n<reg name="lr" bitsize="32" regnum="14" save-restore="no" type="code_ptr" group="general"/>\n<reg name="pc" bitsize="32" regnum="15" save-restore="no" type="code_ptr" group="general"/>\n<reg name="cpsr" bitsize="32" regnum="25" save-restore="no" type="uint32" group="general"/>\n</feature>\n<feature name="net.sourceforge.openocd.banked">\n<reg name="sp_usr" bitsize="32" regnum="26" save-restore="no" type="data_ptr" group="banked"/>\n<reg name="lr_usr" bitsize="32" regnum="27" save-restore="no" type="code_ptr" group="banked"/>\n<reg name="r8_fiq" bitsize="32" regnum="28" save-restore="no" type="uint32" group="banked"/>\n<reg name="r9_fiq" bitsize="32" regnum="29" save-restore="no" type="uint32" group="banked"/>\n<reg name="r10_fiq" bitsize="32" regnum="30" save-restore="no" type="uint32" group="banked"/>\n<reg name="r11_fiq" bitsize="32" regnum="31" save-restore="no" type="uint32" group="banked"/>\n<reg name="r12_fiq" bitsize="32" regnum="32" save-restore="no" type="uint32" group="banked"/>\n<reg name="sp_fiq" bitsize="32" regnum="33" save-restore="no" type="data_ptr" group="banked"/>\n<reg name="lr_fiq" bitsize="32" regnum="34" save-restore="no" type="code_ptr" group="banked"/>\n<reg name="sp_irq" bitsize="32" regnum="35" save-restore="no" type="data_ptr" group="banked"/>\n<reg name="lr_irq" bitsize="32" regnum="36" save-restore="no" type="code_ptr" group="banked"/>\n<reg name="sp_svc" bitsize="32" regnum="37" save-restore="no" type="data_ptr" group="banked"/>\n<reg name="lr_svc" bitsize="32" regnum="38" save-restore="no" type="code_ptr" group="banked"/>\n<reg name="sp_abt" bitsize="32" regnum="39" save-restore="no" type="data_ptr" group="banked"/>\n<reg name="lr_abt" bitsize="32" regnum="40" save-restore="no" type="code_ptr" group="banked"/>\n<reg name="sp_und" bitsize="32" regnum="41" save-restore="no" type="data_ptr" group="banked"/>\n<reg name="lr_und" bitsize="32" regnum="42" save-restore="no" type="code_ptr" group="banked"/>\n<reg name="spsr_fiq" bitsize="32" regnum="43" save-restore="no" type="uint32" group="banked"/>\n<reg name="spsr_irq" bitsize="32" regnum="44" save-restore="no" type="uint32" group="banked"/>\n<reg name="spsr_svc" bitsize="32" regnum="45" save-restore="no" type="uint32" group="banked"/>\n<reg name="spsr_abt" bitsize="32" regnum="46" save-restore="no" type="uint32" group="banked"/>\n<reg name="spsr_und" bitsize="32" regnum="47" save-restore="no" type="uint32" group="banked"/>\n</feature>\n</target>\n#ee
w ++$?#3f
r $S02#b5
w +
r <Timeout: 2 seconds>
w $?#3f
r $S02#b5
w +
r <Timeout: 2 seconds>
w $?#3f
r $S02#b5
w +
r <Timeout: 2 seconds>
w $?#3f
r $S02#b5
w +
r <Timeout: 2 seconds><Timeout: 2 seconds>
w -
r <Timeout: 2 seconds>
w -
r <Timeout: 2 seconds>
w -+$Hc-1#09
r $OK#9a
w +
r <Timeout: 2 seconds>
w $Hc-1#09
r $OK#9a
w +
r <Timeout: 2 seconds>
w $Hc-1#09
r $OK#9a
w +
r <Timeout: 2 seconds>
w $Hc-1#09
r $OK#9a
w +
r <Timeout: 2 seconds><Timeout: 2 seconds>
w -
r <Timeout: 2 seconds>
w -
r <Timeout: 2 seconds>
w -+$qC#b4
r $QC0#c4
w +
r <Timeout: 2 seconds>
w $qC#b4
r $QC0#c4
w +
r <Timeout: 2 seconds>
w $qC#b4
r $QC0#c4
w +
r <Timeout: 2 seconds>
w $qC#b4
r $QC0#c4
w +
r <Timeout: 2 seconds><Timeout: 2 seconds>
w -
r <Timeout: 2 seconds>
w -
r <Timeout: 2 seconds>
w -+$qOffsets#4b
r $Text=0;Data=0;Bss=0#04
w +
r <Timeout: 2 seconds>
w $qOffsets#4b
r $Text=0;Data=0;Bss=0#04
w +
r <Timeout: 2 seconds>
w $qOffsets#4b
r $Text=0;Data=0;Bss=0#04
w +
r <Timeout: 2 seconds>
w $qOffsets#4b
r $Text=0;Data=0;Bss=0#04
w +
r <Timeout: 2 seconds><Timeout: 2 seconds>
w -
r <Timeout: 2 seconds>
w -
r <Timeout: 2 seconds>
w -+
End of log
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