Difference between revisions of "GDB"

Revision as of 18:06, 18 March 2009

On this page you will find all you need to debug your userspace applications running on your Armadeus board.

First of all, be sure to have installed the Toolchain. During Buildroot's Cross Compiler configuration be sure to have choosen following options:

Toolchain  ---> Build gdb server for the Target
Toolchain  ---> Build gdb for the Host

and optionally:

Toolchain  ---> Build gdb debugger for the Target

Use -g option of gcc:

 $ make shell_env
 $ . armadeus_env.sh
 $ export PATH=$PATH:$ARMADEUS_TOOLCHAIN_PATH
 $ arm-linux-gcc -g -o hello hello.c

 # gdbserver 192.168.0.2:2345 program [args]

192.168.0.2 is the IP address of your Host and 2345 the port number to use (examples).

 []$ arm-linux-gdb program
 (gdb) set solib-absolute-prefix ./buildroot/build_armv4t/staging_dir/
 (gdb) target remote 192.168.0.10:2345

192.168.0.10 is the address of your target

only continue (c) can be used to start the program, because it is already running when you launch GDB on your host.

Core dump analysis doesn't seem to work in this use case !!

 $ make menuconfig

Toolchain  --->
        *** Gdb Options ***
    [*] Build gdb debugger for the Target

 $ make

Then you can either reflash your rootfs, or copy $ARMADEUS_ROOTFS_DIR/bin/gdb to your board, to a SD or to a NFS export.

 # gdb your_prog

If you need argument passing:

 # gdb --args your_prog your_args

To debug a Core dump:

 # gdb your_prog -c your_core_file

Other languages:
English • Français

@@ Line 36: / Line 36: @@
 ==Debugging directly on your APF (may require more memory)==
-You have to build gdb for the target and have a working NFS link between your target and your host.<br>
+* You have to build gdb for the target:
-On target launch GDB from your NFS mount:
+<pre class="host">
+ $ make menuconfig
+</pre>
+<pre class="config">
+Toolchain  --->
+        *** Gdb Options ***
+    [*] Build gdb debugger for the Target
+</pre>
+<pre class="host">
+ $ make
+</pre>
+Then you can either reflash your rootfs, or copy ''$ARMADEUS_ROOTFS_DIR/bin/gdb'' to your board, to a SD or to a NFS export.
+* After installation, launch gdb on your APF:
 <pre class="apf">
-  # /mnt/host/gdb your_prog
+  # gdb your_prog
 </pre>
 If you need argument passing:
 <pre class="apf">
-  # /mnt/host/gdb --args your_prog your_args
+  # gdb --args your_prog your_args
 </pre>
 To debug a Core dump:
 <pre class="apf">
-  # /mnt/host/gdb your_prog -c your_core_file
+  # gdb your_prog -c your_core_file
 </pre>