Hi, Thanks for your response Earlier I was using native gdb found on x86 machine. Then I used gdb targeted for MIPS machine, but it didn't work.
-------------------------------------------------- # ./mipsisa32-elf-gdb ../linux/kernels/mips-linux-2.6.15/vmlinux GNU gdb 5.3 (eCosCentric) Copyright 2002 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=mipsisa32-elf"... (gdb) (gdb) (gdb) set remotebaud 115200 (gdb) (gdb) target remote /dev/ttyUSB0 Remote debugging using /dev/ttyUSB0 Ignoring packet error, continuing... Ignoring packet error, continuing... Ignoring packet error, continuing... Couldn't establish connection to remote target Malformed response to offset query, timeout (gdb) q -------------------------------------------------- regards Amit On Fri, Jun 20, 2008 at 1:08 PM, rupesh. gujare <[EMAIL PROTECTED]> wrote: > Amit, > Which gdb you are using? Is it native gdb that you find on x86 machine? > or is it for MIPS architecture running from your x86 machine? > > Regards, > Rupesh > > On Fri, 20 Jun 2008 12:36:14 +0530, Amit <[EMAIL PROTECTED]> wrote: > > Hi, > > > > I'm new to this list. Excuse me if my questions sound too trivial. > > > > I'm getting the following error messages. > > > > ---------------------------------------------------------- > > Test Machine(MIPS) --> > > RedBoot> fis load -d vmlinux > > Image loaded from 0x80060000-0x80291085 > > RedBoot> exec -c "kgdb8250=0,115200 root=31:02 rootfstype=jffs2 > > init=/sbin/init" > > Now booting linux kernel: > > Base address 0x80050000 Entry 0x80256000 > > Cmdline : kgdb8250=0,115200 root=31:02 rootfstype=jffs2 init=/sbin/init > > > > Development Machine(x86) --> > > # gdb ./vmlinux > > GNU gdb Red Hat Linux (6.1post-1.20040607.43.0.1rh) > > Copyright 2004 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 "i386-redhat-linux-gnu"...(no debugging > symbols > > found)...Using host libthread_db library "/lib/tls/libthread_db.so.1". > > > > (gdb) set remotebaud 115200 > > (gdb) > > (gdb) target remote /dev/ttyUSB0 > > Remote debugging using /dev/ttyUSB0 > > Ignoring packet error, continuing... > > Ignoring packet error, continuing... > > Ignoring packet error, continuing... > > Couldn't establish connection to remote target > > Malformed response to offset query, timeout > > (gdb) > > > > ---------------------------------------------------------- > > Development machine: x86 > > Test machine: MIPS > > > > Connected through a Serial(mips) to USB(x86) connector. > > > > Test machine runs "mips-linux-2.6.15" cross-compiled on my development > > machine. > > I couldn't find KGDB patch for mips-linux-2.6.15 :( so I used > > linux-2.6.15.5-kgdb-2.4.tar.bz2 KGDB patch for test machine. > > > > ---------------------------------------------------------- > > Questions: > > > > 1. Is my setup correct? Do i have to use development and test machines of > > same architecture? MIPS platform is still supported or not? > > > > 2. I'm using a Serial to USB converter, is it fine or I have to use a > null > > modem cable only? > > > > 3. I believe I'm not using a right KGDB patch, is it so? > > > > ---------------------------------------------------------- > > .config files I tried --> > > > > 1. > > # Kernel hacking > > # > > CONFIG_DEBUG_KERNEL=y > > ....... > > CONFIG_DEBUG_INFO=y > > CONFIG_WANT_EXTRA_DEBUG_INFORMATION=y > > CONFIG_KGDB=y > > CONFIG_KGDB_CONSOLE=y > > CONFIG_KGDB_8250_NOMODULE=y > > CONFIG_CROSSCOMPILE=y > > CONFIG_CMDLINE="" > > > > ---------------------------------------------------------- > > 2. > > # Kernel hacking > > # > > CONFIG_DEBUG_KERNEL=y > > ....... > > CONFIG_DEBUG_INFO=y > > CONFIG_WANT_EXTRA_DEBUG_INFORMATION=y > > CONFIG_KGDB=y > > CONFIG_KGDB_CONSOLE=y > > CONFIG_KGDB_ONLY_MODULES=y > > CONFIG_CROSSCOMPILE=y > > CONFIG_CMDLINE="" > > > > ---------------------------------------------------------- > > Command line options I used during kernel booting at test machine: > > > > 1. Cmdline : kgdb8250=0,115200 root=31:02 rootfstype=jffs2 > init=/sbin/init > > > > 2. Cmdline : kgdb8250=0,115200 kgdbwait root=31:02 rootfstype=jffs2 > > init=/sbin/init > > > > 3. Cmdline : console=ttyS0,115200 root=31:02 rootfstype=jffs2 > > init=/sbin/init > > > > 4. Cmdline : console=ttyS0,115200 kgdbwait root=31:02 rootfstype=jffs2 > > init=/sbin/init > > > > None of the above solved my problem. > > > > ---------------------------------------------------------- > > I also tried using different BAUDRATES but no success there too. > > > > Any help or pointers on this would be great. > > > > > > Thanks > > Amit Pundir > > ------------------------------------------------------------------------- > > Check out the new SourceForge.net Marketplace. > > It's the best place to buy or sell services for > > just about anything Open Source. > > http://sourceforge.net/services/buy/index.php > > _______________________________________________ > > Kgdb-bugreport mailing list > > [email protected] > > https://lists.sourceforge.net/lists/listinfo/kgdb-bugreport > > ------------------------------------------------------------------------- Check out the new SourceForge.net Marketplace. 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