devdocs/gcc~13/bpf-function-attributes.html


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<div class="subsection-level-extent" id="BPF-Function-Attributes"> <div class="nav-panel"> <p> Next: <a href="c-sky-function-attributes" accesskey="n" rel="next">C-SKY Function Attributes</a>, Previous: <a href="blackfin-function-attributes" accesskey="p" rel="prev">Blackfin Function Attributes</a>, Up: <a href="function-attributes" accesskey="u" rel="up">Declaring Attributes of Functions</a> [<a href="index#SEC_Contents" title="Table of contents" rel="contents">Contents</a>][<a href="indices" title="Index" rel="index">Index</a>]</p> </div>  <h1 class="subsection" id="BPF-Function-Attributes-1"><span>6.33.8 BPF Function Attributes<a class="copiable-link" href="#BPF-Function-Attributes-1"> ¶</a></span></h1> <p>These function attributes are supported by the BPF back end: </p> <dl class="table"> <dt>
<span><code class="code">kernel_helper</code><a class="copiable-link" href="#index-kernel-helper_002c-function-attribute_002c-BPF"> ¶</a></span>
</dt> <dd>
<p>use this attribute to indicate the specified function declaration is a kernel helper. The helper function is passed as an argument to the attribute. Example: </p> <div class="example smallexample"> <pre class="example-preformatted" data-language="cpp">int bpf_probe_read (void *dst, int size, const void *unsafe_ptr)
  __attribute__ ((kernel_helper (4)));</pre>
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