I'm debugging Linux 2.6.29-rc8 with OpenOCD.
Linux for arm has arm generic debug option which send debug messages via
DCC channel.
-- see --
make ARCH=arm menuconfig
Kernel hacking
Kernel low-level debugging functions
Kernel low-level debugging via EmbeddedICE DCC channel
---------
This patch adds a feature to recive such a message.
to enable this feature, type
target_request debugmsgs charmsg
# I am not a good english speaker, and I do not know about texi.
# please fix them, if there is strange sentence.
--------
Hiroshi Ito
Media Lab. Inc.,
URL http://www.mlb.co.jp ( Sorry, Japanese only. )
TEL +81-3-5294-7255 FAX +81-3-5294-7256
Index: src/target/target_request.c
===================================================================
--- src/target/target_request.c (revision 1430)
+++ src/target/target_request.c (working copy)
@@ -39,6 +39,7 @@
#include <string.h>
command_t *target_request_cmd = NULL;
+static int charmsg_mode = 0;
int target_asciimsg(target_t *target, u32 length)
{
@@ -119,7 +120,11 @@
int target_request(target_t *target, u32 request)
{
target_req_cmd_t target_req_cmd = request & 0xff;
-
+
+ if ( charmsg_mode ) {
+ target_charmsg(target, target_req_cmd );
+ return ERROR_OK;
+ }
switch (target_req_cmd)
{
case TARGET_REQ_TRACEMSG:
@@ -268,7 +273,7 @@
if (argc > 0)
{
- if (!strcmp(args[0], "enable"))
+ if (!strcmp(args[0], "enable") || !strcmp(args[0], "charmsg"))
{
/* don't register if this command context is already
receiving */
if (!receiving)
@@ -276,6 +281,7 @@
receiving = 1;
add_debug_msg_receiver(cmd_ctx, target);
}
+ charmsg_mode = !strcmp(args[0], "charmsg");
}
else if (!strcmp(args[0], "disable"))
{
@@ -288,13 +294,12 @@
}
else
{
- command_print(cmd_ctx, "usage: target_request debugmsgs
['enable'|'disable']");
+ command_print(cmd_ctx, "usage: target_request debugmsgs
['enable'|'disable'|'charmsg']");
}
}
command_print(cmd_ctx, "receiving debug messages from current target
%s",
- (receiving) ? "enabled" : "disabled");
-
+ (receiving) ? (charmsg_mode?"charmsg":"enabled") :
"disabled" );
return ERROR_OK;
}
Index: doc/openocd.texi
===================================================================
--- doc/openocd.texi (revision 1430)
+++ doc/openocd.texi (working copy)
@@ -2871,9 +2871,9 @@
OpenOCD can handle certain target requests, currently debugmsg are only
supported for arm7_9 and cortex_m3.
See libdcc in the contrib dir for more details.
@itemize @bullet
-...@item @b{target_request debugmsgs} <@var{enable}|@var{disable}>
+...@item @b{target_request debugmsgs}
<@var{enable}|@var{disable}|@var{charmsg}>
@cindex target_request debugmsgs
-...@*enable/disable target debugmsgs requests. debugmsgs enable messages to be
sent to the debugger while the target is running.
+...@*enable/disable target debugmsgs requests. debugmsgs enable messages to be
sent to the debugger while the target is running. @var{charmsg} recives the
message like linux kernel ``Kernel low-level debugging via EmbeddedICE DCC
channel'' option way.
@end itemize
@node JTAG Commands
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