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Questions on RTEMS GDB stub over a serial line



Hi rtems-usersall!

I am establishing a remote debug enviroment of RTEMS in a VMware workstation. I am using Till Straumann's GDB Agent for RTEMS. I referred http://www.slac.stanford.edu/~strauman/rtems/gdb/ but I am not clear enough about how to setup a session between the host and the target using a serial port.

Questions
=========

1) Where is the serial device? 
Some codes were added to list all file under /dev/ but only /dev/console was found.

2) Is my test program correct?
The source codes are attached at last.

3) Why no debugging symbols found in the hello.exe although flag -g was used?
ian at IanVM-1:~/src/examples-4.7.1/hello4gdb> /opt/gdb-6.5/i386-rtems-gdb
GNU gdb 6.5
Copyright (C) 2006 Free Software Foundation, Inc.
GDB is free software, covered by the GNU General Public License, and you are
welcome to change it and/or distribute copies of it under certain conditions.
Type "show copying" to see the conditions.
There is absolutely no warranty for GDB.  Type "show warranty" for details.
This GDB was configured as "--host=i686-pc-linux-gnu --target=i386-ssrl-rtems".
(gdb) file ./o-optimize/hello.exe
Reading symbols from /home/ian/src/examples-4.7.1/hello4gdb/o-optimize/hello.exe...(no debugging symbols found)...done.



More Information
================

-------------------
RTEMS Configuration
-------------------
My host is Suse-10.1 with RTEMS-4.7.1 that configured as
ian at IanVM-1:~/rtems/b-rtems_debug> ../../src/rtems-4.7.1/configure --target=i386-rtems4.7 --quiet --enable-posix --enable-networking --enable-cxx --enable-rtemsbsp=pc386 --enable-rdbg --prefix=/home/ian/rtems/rtems_debug-4.7.1 CFLAGS=-fno-strict-aliasing


----------------
GDB and the Stub
----------------
I installed GDB 6.5 with patches of GDB stub for RTEMS 1.4(http://www.slac.stanford.edu/~strauman/rtems/gdb/RTEMS_gdb_stub_1_4.tgz) and the GDB stub for RTEMS without using Cexp or libbspext.
I also installed libbspExt-1.3beta and "bsd_eth_drivers" from Till , because they were required while building my simple hello-world test.


-----------------------------
About the two Vitual Machines
-----------------------------
One is the host that has RTEMS developing tools, the other is the target where RTEMS hello-world runs. They are connected with a serial line (a virtual line provided by the VMware workstation).


-------------------
Output of hello.exe
-------------------
Initialized console on port CONSOLE

List of dir /:
name			inode	offset	reclen	type
dev					2		0		268i
List of dir /dev/:
name			inode	offset	reclen	type
console				8		0		268i
Task App Enter
GDB daemon (Release $Name: RTEMS_gdb_stub_1_4 $): starting up

*** HELLO WORLD TEST ***
Hello World
*** END OF HELLO WORLD TEST ***
Task App Exit
GDB daemon - opening tty: No such file or directory
GDB daemon: shutting down


------------------------
Souce Codes of hello.exe
------------------------


ian at IanVM-1:~/src/examples-4.7.1/hello4gdb> cat test.c
-------------------------------------------------------
/*
 *      Simple test program -- simplified version of sample test hello.
 */

#define TEST_INIT
#include <tmacros.h>

#include <bsp.h>

#include <stdlib.h>
#include <stdio.h>
#include <sys/types.h>
#include <fcntl.h>
#include <dirent.h>
#include <errno.h>
#include <string.h>

#include <rtems/rtems_bsdnet.h>
#include <rtems-gdb-stub.h>
#include <bsp/bspExt.h>

#include "networkconfig.h"

#define TASK_PRIORITY_APP 4

void printdir(char *dir_name)
{
        struct dirent *d;
        DIR *dir;

        if (dir_name == NULL) {
                printf("NULL dir name\n");
                return;
        }

        dir = opendir(dir_name);
        if (dir == NULL) {
                printf("open dir %s failed:%s\n", dir_name, strerror(errno));
                return;
        }

        printf("List of dir %s:\n", dir_name);
        printf( "%-20s %8s %8s %8s %4s\n",
                 "name", "      inode", " offset", "reclen", " type" );
        d = readdir(dir);

        while (d) {
                printf( "%-20s %8d %8d %6di\n",
                         d->d_name, (int)d->d_ino, (int)d->d_off, d->d_reclen);
                d = readdir(dir);
        }

        return;
}


rtems_task
app_task (rtems_task_argument ignored)
{
        rtems_status_code ret;

        printf("Task App Enter\n");


        rtems_gdb_start(0, "/dev/ttyS0");

        printf( "\n\n*** HELLO WORLD TEST ***\n" );
        printf( "Hello World\n" );
        printf( "*** END OF HELLO WORLD TEST ***\n" );

        /* delete myself and exit */
        printf("Task App Exit\n");
        ret = rtems_task_delete(RTEMS_SELF);
        directive_failed(ret, "Delete task App");
}

rtems_task Init(
        rtems_task_argument ignored
)
{
        rtems_name app_name;
        rtems_id app_id;
        rtems_status_code ret;

        printdir("/");
        printdir("/dev/");

        /* create and start application task */
        app_name = rtems_build_name('a', 'p', 'p', '0');
        ret = rtems_task_create(app_name,
                        TASK_PRIORITY_APP,
                        RTEMS_MINIMUM_STACK_SIZE,
                        RTEMS_DEFAULT_MODES,
                        RTEMS_DEFAULT_ATTRIBUTES,
                        &app_id);
        directive_failed(ret, "Create task App");

        ret = rtems_task_start(app_id, app_task, 0);
        directive_failed(ret, "Start task App");

        /* delete myself and exit */
        ret = rtems_task_delete(RTEMS_SELF);
        directive_failed(ret, "Delete task Init");
}

/* configuration information */

#define CONFIGURE_TEST_NEEDS_CONSOLE_DRIVER
#define CONFIGURE_TEST_NEEDS_CLOCK_DRIVER
#define CONFIGURE_RTEMS_INIT_TASKS_TABLE
#define CONFIGURE_LIBIO_MAXIMUM_FILE_DESCRIPTORS 20
#define CONFIGURE_USE_IMFS_AS_BASE_FILESYSTEM
#define CONFIGURE_MAXIMUM_TASKS 4
#define CONFIGURE_EXECUTIVE_RAM_SIZE    (512*1024)

#define CONFIGURE_INIT

#include <rtems/confdefs.h>

/* end of file */


ian at IanVM-1:~/src/examples-4.7.1/hello4gdb> cat Makefile
--------------------------------------------------------
#
#  $Id: Makefile,v 1.4 1998/08/21 13:26:05 joel Exp $
#

SAMPLE=hello
PGM=${ARCH}/$(SAMPLE).exe

MANAGERS=all

# C source names, if any, go here -- minus the .c
C_PIECES= test
C_FILES=$(C_PIECES:%=%.c)
C_O_FILES=$(C_PIECES:%=${ARCH}/%.o)

H_FILES=

DOCTYPES=
DOCS=$(DOCTYPES:%=$(SAMPLE).%)

SRCS=$(DOCS) $(C_FILES) $(CC_FILES) $(H_FILES) $(S_FILES)
OBJS=$(C_O_FILES) $(CC_O_FILES) $(S_O_FILES)

PRINT_SRCS=$(DOCS)

PGM=${ARCH}/$(SAMPLE).exe

include $(RTEMS_MAKEFILE_PATH)/Makefile.inc
include $(RTEMS_CUSTOM)
include $(PROJECT_ROOT)/make/leaf.cfg

#
# (OPTIONAL) Add local stuff here using +=
#

DEFINES  +=
CPPFLAGS +=
CFLAGS_LD += -Wl,--defsym -Wl,HeapSize=0xC0000
CFLAGS_OPTIMIZE_V   +=
CFLAGS_DEBUG_V   += -v -qrtems_debug

CFLAGS_LD += -g


CFLAGS   += -fno-strict-aliasing -O
CFLAGS   += -I${RTEMS_MAKEFILE_PATH}/include
CFLAGS   += -I/home/ian/src/examples-4.7.1/test_includes
CFLAGS   += -g
CFLAGS   += -Wall

#OP_SYS_LDFLAGS = -g

LD_PATHS  += -L${RTEMS_MAKEFILE_PATH}/lib
#LD_LIBS   += -lif_le -lbsdport -lbspExt
LD_LIBS   += -lrtems-gdb-stub -lif_le -lbsdport -lbspExt
#LD_LIBS   += -lrtems-gdb-stub
LIBS   +=  -lrtemsall -lc

#
# Add your list of files to delete here.  The config files
#  already know how to delete some stuff, so you may want
#  to just run 'make clean' first to see what gets missed.
#  'make clobber' already includes 'make clean'
#

CLEAN_ADDITIONS +=
CLOBBER_ADDITIONS +=

all:    ${ARCH} $(SRCS) $(PGM)

${PGM}: $(OBJS) $(LINK_FILES)
        $(make-exe)

# Install the program(s), appending _g or _p as appropriate.
# for include files, just use $(INSTALL)
install:  all
        $(INSTALL_VARIANT) -m 555 ${PGM} ${PROJECT_RELEASE}/tests


ian at IanVM-1:~/src/examples-4.7.1/hello4gdb> cat networkconfig.h
---------------------------------------------------------------
/*
 * Network configuration
 *
 ************************************************************
 * EDIT THIS FILE TO REFLECT YOUR NETWORK CONFIGURATION     *
 * BEFORE RUNNING ANY RTEMS PROGRAMS WHICH USE THE NETWORK! *
 ************************************************************
 *
 *  $Id: networkconfig.h,v 1.8 2001/08/31 18:11:43 joel Exp $
 */

#ifndef _RTEMS_NETWORKCONFIG_H_
#define _RTEMS_NETWORKCONFIG_H_

//#define USE_QEMU


/*
 *  The following will normally be set by the BSP if it supports
 *  a single network device driver.  In the event, it supports
 *  multiple network device drivers, then the user's default
 *  network device driver will have to be selected by a BSP
 *  specific mechanism.
 */

#ifdef RTEMS_BSP_NETWORK_DRIVER_NAME
#undef RTEMS_BSP_NETWORK_DRIVER_NAME
#endif
#ifdef USE_QEMU
#define RTEMS_BSP_NETWORK_DRIVER_NAME BSP_NE2000_NETWORK_DRIVER_NAME
#else
#define RTEMS_BSP_NETWORK_DRIVER_NAME "le1"
#endif



#ifdef RTEMS_BSP_NETWORK_DRIVER_ATTACH
#undef RTEMS_BSP_NETWORK_DRIVER_ATTACH
#endif

#ifdef USE_QEMU
#define RTEMS_BSP_NETWORK_DRIVER_ATTACH BSP_NE2000_NETWORK_DRIVER_ATTACH
#else
#define RTEMS_BSP_NETWORK_DRIVER_ATTACH libbsdport_netdriver_attach
#endif

#include <rtems/pci.h>
#include <rtems/irq.h>

#ifndef USE_QEMU
#include <bsp/libbsdport_api.h>
extern driver_t libbsdport_le_pci_driver;

driver_t *libbsdport_netdriver_table[] = {
        &libbsdport_le_pci_driver,
        /* other drivers here or upstream of 'le' if they support
        * the same hardware but are preferred.
        */
        0
};
#endif

/* #define RTEMS_USE_BOOTP */

#include <bsp.h>

/*
 * Define RTEMS_SET_ETHERNET_ADDRESS if you want to specify the
 * Ethernet address here.  If RTEMS_SET_ETHERNET_ADDRESS is not
 * defined the driver will choose an address.
 */
#ifndef USE_QEMU
#define RTEMS_SET_ETHERNET_ADDRESS
#endif
#if (defined (RTEMS_SET_ETHERNET_ADDRESS))
/* static char ethernet_address[6] = { 0x08, 0x00, 0x3e, 0x12, 0x28, 0xb1 }; */
static char ethernet_address[6] = { 0x00, 0x80, 0x7F, 0x22, 0x61, 0x77 };

#endif

#ifdef RTEMS_USE_LOOPBACK
/*
 * Loopback interface
 */
extern void rtems_bsdnet_loopattach();
static struct rtems_bsdnet_ifconfig loopback_config = {
        "lo0",                          /* name */
        rtems_bsdnet_loopattach,        /* attach function */

        NULL,                           /* link to next interface */

        "127.0.0.1",                    /* IP address */
        "255.0.0.0",                    /* IP net mask */
};
#endif


/*
 * Default network interface
 */
static struct rtems_bsdnet_ifconfig netdriver_config = {
        RTEMS_BSP_NETWORK_DRIVER_NAME,          /* name */
        RTEMS_BSP_NETWORK_DRIVER_ATTACH,        /* attach function */


#ifdef RTEMS_USE_LOOPBACK
        &loopback_config,               /* link to next interface */
#else
        NULL,                           /* No more interfaces */
#endif

#if (defined (RTEMS_USE_BOOTP))
        NULL,                           /* BOOTP supplies IP address */
        NULL,                           /* BOOTP supplies IP net mask */
#else
        //"XXX.YYY.ZZZ.XYZ",            /* IP address */

#ifdef USE_QEMU
        "192.168.10.230",               /* IP address */
#else
        "192.168.1.230",                /* IP address */
#endif

        "255.255.255.0",                /* IP net mask */
#endif /* !RTEMS_USE_BOOTP */

#if (defined (RTEMS_SET_ETHERNET_ADDRESS))
        ethernet_address,               /* Ethernet hardware address */
#else
        NULL,                           /* Driver supplies hardware address */
#endif


#ifndef USE_QEMU
        0                               /* Use default driver parameters */
#else
        0,                              /* Use default driver parameters */
        0,
        0,
        0,

        0x300,
        9,
        0
#endif
};

/*
 * Network configuration
 */
struct rtems_bsdnet_config rtems_bsdnet_config = {
        &netdriver_config,

#if (defined (RTEMS_USE_BOOTP))
        rtems_bsdnet_do_bootp,
#else
        NULL,
#endif

        0,                      /* Default network task priority */
        0,                      /* Default mbuf capacity */
        0,                      /* Default mbuf cluster capacity */

#if (!defined (RTEMS_USE_BOOTP))
        "IanVM-N0",             /* Host name */
        "nodomain.com",         /* Domain name */
        "192.168.1.254",        /* Gateway */
        "192.168.1.241",        /* Log host */
        {"192.168.1.106" },     /* Name server(s) */
        {"192.168.1.241" },     /* NTP server(s) */

        /*
         *  A real example -- DO NOT USE THIS YOURSELF!!!
         */

#if 0
        "dy4",                  /* Host name */
        "NOT_oarcorp.com",      /* Domain name */
        "192.168.1.2",          /* Gateway */
        "192.168.1.2",          /* Log host */
        {"192.168.1.2" },       /* Name server(s) */
        {"192.168.1.2" },       /* NTP server(s) */
#endif
#endif /* !RTEMS_USE_BOOTP */

};

/*
 * For TFTP test application
 */
#if (defined (RTEMS_USE_BOOTP))
#define RTEMS_TFTP_TEST_HOST_NAME "BOOTP_HOST"
#define RTEMS_TFTP_TEST_FILE_NAME "BOOTP_FILE"
#else
#define RTEMS_TFTP_TEST_HOST_NAME "XXX.YYY.ZZZ.XYZ"
#define RTEMS_TFTP_TEST_FILE_NAME "tftptest"
#endif

#endif /* _RTEMS_NETWORKCONFIG_H_ */






 				
--------------
Ian Jiang
ianjiang.cn at gmail.com
2007-11-27 20:09:23