92 lines
3.6 KiB
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92 lines
3.6 KiB
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<title>File-I/O Examples - Debugging with GDB</title>
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<link rel="up" href="File_002dI_002fO-Remote-Protocol-Extension.html#File_002dI_002fO-Remote-Protocol-Extension" title="File-I/O Remote Protocol Extension">
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<a name="File-I%2fO-Examples"></a>
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<a name="File_002dI_002fO-Examples"></a>
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<p>
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Previous: <a rel="previous" accesskey="p" href="Constants.html#Constants">Constants</a>,
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Up: <a rel="up" accesskey="u" href="File_002dI_002fO-Remote-Protocol-Extension.html#File_002dI_002fO-Remote-Protocol-Extension">File-I/O Remote Protocol Extension</a>
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</div>
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<h4 class="subsection">E.13.10 File-I/O Examples</h4>
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<p><a name="index-file_002di_002fo-examples-3630"></a>
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Example sequence of a write call, file descriptor 3, buffer is at target
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address 0x1234, 6 bytes should be written:
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<pre class="smallexample"> <- <code>Fwrite,3,1234,6</code>
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<em>request memory read from target</em>
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-> <code>m1234,6</code>
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<- XXXXXX
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<em>return "6 bytes written"</em>
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-> <code>F6</code>
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</pre>
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<p>Example sequence of a read call, file descriptor 3, buffer is at target
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address 0x1234, 6 bytes should be read:
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<pre class="smallexample"> <- <code>Fread,3,1234,6</code>
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<em>request memory write to target</em>
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-> <code>X1234,6:XXXXXX</code>
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<em>return "6 bytes read"</em>
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-> <code>F6</code>
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</pre>
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<p>Example sequence of a read call, call fails on the host due to invalid
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file descriptor (<code>EBADF</code>):
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<pre class="smallexample"> <- <code>Fread,3,1234,6</code>
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-> <code>F-1,9</code>
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</pre>
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<p>Example sequence of a read call, user presses <kbd>Ctrl-c</kbd> before syscall on
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host is called:
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<pre class="smallexample"> <- <code>Fread,3,1234,6</code>
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-> <code>F-1,4,C</code>
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<- <code>T02</code>
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</pre>
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<p>Example sequence of a read call, user presses <kbd>Ctrl-c</kbd> after syscall on
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host is called:
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<pre class="smallexample"> <- <code>Fread,3,1234,6</code>
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-> <code>X1234,6:XXXXXX</code>
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<- <code>T02</code>
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</pre>
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</body></html>
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