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| <a name="Setting-the-Entry-Point"></a> |
| <h4 class="subsection">3.4.1 Setting the Entry Point</h4> |
| <a name="index-ENTRY_0028symbol_0029"></a> |
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| <a name="index-entry-point"></a> |
| <p>The first instruction to execute in a program is called the <em>entry |
| point</em>. You can use the <code>ENTRY</code> linker script command to set the |
| entry point. The argument is a symbol name: |
| </p><div class="smallexample"> |
| <pre class="smallexample">ENTRY(<var>symbol</var>) |
| </pre></div> |
| |
| <p>There are several ways to set the entry point. The linker will set the |
| entry point by trying each of the following methods in order, and |
| stopping when one of them succeeds: |
| </p><ul> |
| <li> the ‘<samp>-e</samp>’ <var>entry</var> command-line option; |
| </li><li> the <code>ENTRY(<var>symbol</var>)</code> command in a linker script; |
| </li><li> the value of a target specific symbol, if it is defined; For many |
| targets this is <code>start</code>, but PE and BeOS based systems for example |
| check a list of possible entry symbols, matching the first one found. |
| </li><li> the address of the first byte of the ‘<samp>.text</samp>’ section, if present; |
| </li><li> The address <code>0</code>. |
| </li></ul> |
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