diff options
Diffstat (limited to 'doc/daily_work.inc')
| -rw-r--r-- | doc/daily_work.inc | 25 |
1 files changed, 14 insertions, 11 deletions
diff --git a/doc/daily_work.inc b/doc/daily_work.inc index 3f6c9f078..460693021 100644 --- a/doc/daily_work.inc +++ b/doc/daily_work.inc @@ -251,14 +251,17 @@ the QEMU in the first console as: :: - $ cd ptxdistPlatformDir/root-debug - ptxdistPlatformDir/root-debug$ qemu-<architecture> -g 1234 -cpu <cpu-core> -L . usr/bin/myapp + $ cd ptxdistPlatformDir/root + ptxdistPlatformDir/root$ qemu-<architecture> -g 1234 -cpu <cpu-core> -L . usr/bin/myapp -.. note:: PTXdist always builds two root filesystems. ``root/`` and - ``root-debug/``. ``root/`` contains all components without debug +.. note:: PTXdist always builds a root filesystems ``root/``. + It contains all components without debug information (all binaries are in the same size as used later on on the - real target), while all components in ``root-debug/`` still containing - the debug symbols and are much bigger in size. + real target). In addition, each directory that contains binaries also + contains a ``.debug/`` directory. It contains a file with only the debug + symbols for each binary. These files are ignored while running + applications but GDB knows about it and will automatically load the debug + files. The added *-g 1234* parameter lets QEMU wait for a GDB connection to run the application. @@ -269,18 +272,18 @@ used to build the project: :: - $ ./selected_toolchain/<target>-gdbtui platform-<platformname>/root-debug/usr/bin/myapp + $ ./selected_toolchain/<target>-gdbtui platform-<platformname>/root/usr/bin/myapp This will run a *curses* based GDB. Not so easy to handle (we must enter all the commands and cannot click with a mouse!), but very fast to take a quick look at our application. At first we tell GDB where to look for debug symbols. The correct -directory here is ``root-debug/``. +directory here is ``root/``. :: - (gdb) set solib-absolute-prefix platform-<platformname>/root-debug + (gdb) set solib-absolute-prefix platform-<platformname>/root Next we connect this GDB to the waiting QEMU: @@ -289,7 +292,7 @@ Next we connect this GDB to the waiting QEMU: (gdb) target remote localhost:1234 Remote debugging using localhost:1234 [New Thread 1] - 0x40096a7c in _start () from root-debug/lib/ld.so.1 + 0x40096a7c in _start () from root/lib/ld.so.1 As our application is already started, we can’t use the GDB command ``start`` to run it until it reaches ``main()``. We set a breakpoint @@ -304,7 +307,7 @@ instead at ``main()`` and *continue* the application: Breakpoint 1, main (argc=1, argv=0x4007f03c) at myapp.c:644 The top part of the running gdbtui console will always show us the -current source line. Due to the ``root-debug/`` directory usage all +current source line. Due to the ``root/`` directory usage all debug information for GDB is available. Now we can step through our application by using the commands *step*, |