137 lines
5.5 KiB
HTML
137 lines
5.5 KiB
HTML
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<title>Simulavr: 3.1 GDB Hints</title>
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<a name="GDB-Hints"></a>
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<a name="SEC6"></a>
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<table cellpadding="1" cellspacing="1" border="0">
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<tr><td valign="middle" align="left">[<a href="simulavr_5.html#SEC5" title="Previous section in reading order"> < </a>]</td>
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<td valign="middle" align="left">[<a href="simulavr_toc.html#SEC_Contents" title="Table of contents">Contents</a>]</td>
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<td valign="middle" align="left">[<a href="simulavr_11.html#SEC11" title="Index">Index</a>]</td>
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<td valign="middle" align="left">[<a href="simulavr_abt.html#SEC_About" title="About (help)"> ? </a>]</td>
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</tr></table>
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<h2 class="section"> 3.1 GDB Hints </h2>
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<p>Since debugging an AVR program with gdb requires gdb to connect to a
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remote target (either simulavr or some other debugging tool, such as
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avarice), a series of commands must be issued every time gdb is started.
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The easiest way around this is to put the commands into a
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‘<tt>.gdbinit</tt>’ file in the project directory. The following example is
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from a ‘<tt>.gdbinit</tt>’ which I use for many projects.
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</p>
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<table><tr><td> </td><td><table class="cartouche" border="1"><tr><td>
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<pre class="example">
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## Print out structures in a sane way
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echo (gdb) set print pretty
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set print pretty
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## Use this for debugging the remote protocol. (Don't use unless
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## debugging simulavr or avr-gdb)
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#echo (gdb) set debug remote 1\n
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#set debug remote 1
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## If you don't want specify the program to debug when invoking gdb,
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## you can tell gdb to read it in here. The file should be an elf file
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## compiled with debugging information (-g for C files and -gstabs for
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## asm files).
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#echo (gdb) file myprog.elf\n
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#file myprog.elf
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## Connect to the remote target via a TCP socket on host:port.
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echo (gdb) target remote localhost:1212\n
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target remote localhost:1212
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## If you are using simulavr as the remote target, this will upload
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## the program into flash memory for you.
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echo (gdb) load\n
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load
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## Set a break point at the beginning of main().
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echo (gdb) break main\n
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break main
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## Run the program up to the first break point. Gdb's `run` command
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## does not work when using a remote target, must use continue.
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echo (gdb) continue\n
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continue
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</pre></td></tr></table>
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</td></tr></table>
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<p>As you can see, I <code>echo</code> every command so I can see what gdb has
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done when it runs the commands in the ‘<tt>.gdbinit</tt>’ file.
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</p>
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