`add_sect .data`\

`add_sect .sdata`\

`add_sect .bss`\

`add_sect .sbss`\

echo "add-symbol-file $1 $ARGS" > ~/add-symbol-file.gdb

10.4. Tips and Tricks

To prevent GDB from jumping around in the code when trying to single step, i. e. when it seems as if

the code is not executing line by line, you can recompile your code with the following additional

compiler options:

-fno-schedule-insns -fno-schedule-insns2

•

On some systems (like the MPC8xx or MPC8260) you can only define one hardware breakpoint.

Therefore you must delete an existing breakpoint before you can define a new one:

(gdb) d b

Delete all breakpoints? (y or n) y

(gdb) b ex_preempt.c:63

Breakpoint 2 at 0xcf030080: file ex_preempt.c, line 63.

•

10.5. Application Debugging

10.5.1. Local Debugging

In case there is a native GDB available for your target you can use it for application debugging as usual:

bash$ gcc -Wall -g -o hello hello.c

bash$ gdb hello

...

(gdb) l

1 #include <stdio.h>

3 int main(int argc, char* argv[])

4 {

5 printf ("Hello world\n");

6 return 0;

7 }

(gdb) break 5

Breakpoint 1 at 0x8048466: file hello.c, line 5.

(gdb) run

Starting program: /opt/eldk/ppc_8xx/tmp/hello

Breakpoint 1, main (argc=0x1, argv=0xbffff9f4) at hello.c:5

5 printf ("Hello world\n");

(gdb) c

Continuing.

Hello world

Program exited normally.

10.5. Application Debugging 135

1 2 ... 130 131 132 133 134 135 136 137 138 139 140 ... 209 210

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