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<html xmlns="http://www.w3.org/1999/xhtml"><head><meta http-equiv="Content-Type" content="text/html; charset=ANSI_X3.4-1968" /><title>Chapter 4. Kernel Internals</title><meta name="generator" content="DocBook XSL Stylesheets V1.75.2" /><link rel="home" href="index.html" title="The utrace User Debugging Infrastructure" /><link rel="up" href="index.html" title="The utrace User Debugging Infrastructure" /><link rel="prev" href="re38.html" title="syscall_set_arguments" /><link rel="next" href="re39.html" title="tracehook_expect_breakpoints" /></head><body><div class="navheader"><table width="100%" summary="Navigation header"><tr><th colspan="3" align="center">Chapter 4. Kernel Internals</th></tr><tr><td width="20%" align="left"><a accesskey="p" href="re38.html">Prev</a> </td><th width="60%" align="center"> </th><td width="20%" align="right"> <a accesskey="n" href="re39.html">Next</a></td></tr></table><hr /></div><div class="chapter" title="Chapter 4. Kernel Internals"><div class="titlepage"><div><div><h2 class="title"><a id="internals"></a>Chapter 4. Kernel Internals</h2></div></div></div><div class="toc"><p><b>Table of Contents</b></p><dl><dt><span class="sect1"><a href="ch04.html#tracehook">Core Calls In</a></span></dt><dt><span class="sect1"><a href="ch04s02.html">Architecture Calls Out</a></span></dt><dd><dl><dt><span class="sect2"><a href="ch04s02.html#arch-ptrace"><code class="filename"><asm/ptrace.h></code></a></span></dt><dt><span class="sect2"><a href="ch04s02.html#arch-syscall"><code class="filename"><asm/syscall.h></code></a></span></dt><dt><span class="sect2"><a href="ch04s02.html#arch-tracehook"><code class="filename"><linux/tracehook.h></code></a></span></dt></dl></dd></dl></div><p>
This chapter covers the interface to the tracing infrastructure
from the core of the kernel and the architecture-specific code.
This is for maintainers of the kernel and arch code, and not relevant
to using the tracing facilities described in preceding chapters.
</p><div class="sect1" title="Core Calls In"><div class="titlepage"><div><div><h2 class="title" style="clear: both"><a id="tracehook"></a>Core Calls In</h2></div></div></div><div class="toc"><dl><dt><span class="refentrytitle"><a href="re39.html"><span>tracehook_expect_breakpoints</span></a></span><span class="refpurpose"> —
guess if task memory might be touched
</span></dt><dt><span class="refentrytitle"><a href="re40.html"><span>tracehook_report_syscall_entry</span></a></span><span class="refpurpose"> —
task is about to attempt a system call
</span></dt><dt><span class="refentrytitle"><a href="re41.html"><span>tracehook_report_syscall_exit</span></a></span><span class="refpurpose"> —
task has just finished a system call
</span></dt><dt><span class="refentrytitle"><a href="re42.html"><span>tracehook_unsafe_exec</span></a></span><span class="refpurpose"> —
check for exec declared unsafe due to tracing
</span></dt><dt><span class="refentrytitle"><a href="re43.html"><span>tracehook_tracer_task</span></a></span><span class="refpurpose"> —
return the task that is tracing the given task
</span></dt><dt><span class="refentrytitle"><a href="re44.html"><span>tracehook_report_exec</span></a></span><span class="refpurpose"> —
a successful exec was completed
</span></dt><dt><span class="refentrytitle"><a href="re45.html"><span>tracehook_report_exit</span></a></span><span class="refpurpose"> —
task has begun to exit
</span></dt><dt><span class="refentrytitle"><a href="re46.html"><span>tracehook_init_task</span></a></span><span class="refpurpose"> —
task_struct has just been copied
</span></dt><dt><span class="refentrytitle"><a href="re47.html"><span>tracehook_free_task</span></a></span><span class="refpurpose"> —
task_struct is being freed
</span></dt><dt><span class="refentrytitle"><a href="re48.html"><span>tracehook_prepare_clone</span></a></span><span class="refpurpose"> —
prepare for new child to be cloned
</span></dt><dt><span class="refentrytitle"><a href="re49.html"><span>tracehook_finish_clone</span></a></span><span class="refpurpose"> —
new child created and being attached
</span></dt><dt><span class="refentrytitle"><a href="re50.html"><span>tracehook_report_clone</span></a></span><span class="refpurpose"> —
in parent, new child is about to start running
</span></dt><dt><span class="refentrytitle"><a href="re51.html"><span>tracehook_report_clone_complete</span></a></span><span class="refpurpose"> —
new child is running
</span></dt><dt><span class="refentrytitle"><a href="re52.html"><span>tracehook_report_vfork_done</span></a></span><span class="refpurpose"> —
vfork parent's child has exited or exec'd
</span></dt><dt><span class="refentrytitle"><a href="re53.html"><span>tracehook_prepare_release_task</span></a></span><span class="refpurpose"> —
task is being reaped, clean up tracing
</span></dt><dt><span class="refentrytitle"><a href="re54.html"><span>tracehook_finish_release_task</span></a></span><span class="refpurpose"> —
final tracing clean-up
</span></dt><dt><span class="refentrytitle"><a href="re55.html"><span>tracehook_signal_handler</span></a></span><span class="refpurpose"> —
signal handler setup is complete
</span></dt><dt><span class="refentrytitle"><a href="re56.html"><span>tracehook_consider_ignored_signal</span></a></span><span class="refpurpose"> —
suppress short-circuit of ignored signal
</span></dt><dt><span class="refentrytitle"><a href="re57.html"><span>tracehook_consider_fatal_signal</span></a></span><span class="refpurpose"> —
suppress special handling of fatal signal
</span></dt><dt><span class="refentrytitle"><a href="re58.html"><span>tracehook_force_sigpending</span></a></span><span class="refpurpose"> —
let tracing force signal_pending(current) on
</span></dt><dt><span class="refentrytitle"><a href="re59.html"><span>tracehook_get_signal</span></a></span><span class="refpurpose"> —
deliver synthetic signal to traced task
</span></dt><dt><span class="refentrytitle"><a href="re60.html"><span>tracehook_notify_jctl</span></a></span><span class="refpurpose"> —
report about job control stop/continue
</span></dt><dt><span class="refentrytitle"><a href="re61.html"><span>tracehook_finish_jctl</span></a></span><span class="refpurpose"> —
report about return from job control stop
</span></dt><dt><span class="refentrytitle"><a href="re62.html"><span>tracehook_notify_death</span></a></span><span class="refpurpose"> —
task is dead, ready to notify parent
</span></dt><dt><span class="refentrytitle"><a href="re63.html"><span>tracehook_report_death</span></a></span><span class="refpurpose"> —
task is dead and ready to be reaped
</span></dt><dt><span class="refentrytitle"><a href="re64.html"><span>set_notify_resume</span></a></span><span class="refpurpose"> —
cause <code class="function">tracehook_notify_resume</code> to be called
</span></dt><dt><span class="refentrytitle"><a href="re65.html"><span>tracehook_notify_resume</span></a></span><span class="refpurpose"> —
report when about to return to user mode
</span></dt></dl></div><p>
These calls are declared in <code class="filename"><linux/tracehook.h></code>.
The core kernel calls these functions at various important places.
</p></div></div><div class="navfooter"><hr /><table width="100%" summary="Navigation footer"><tr><td width="40%" align="left"><a accesskey="p" href="re38.html">Prev</a> </td><td width="20%" align="center"> </td><td width="40%" align="right"> <a accesskey="n" href="re39.html">Next</a></td></tr><tr><td width="40%" align="left" valign="top"><span>syscall_set_arguments</span> </td><td width="20%" align="center"><a accesskey="h" href="index.html">Home</a></td><td width="40%" align="right" valign="top"> <span>tracehook_expect_breakpoints</span></td></tr></table></div></body></html>
