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<div class="headertitle"><div class="title">Fiasco extensions <div class="ingroups"><a class="el" href="group__l4__api.html">Base API</a></div></div></div>
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<p>Extensions of the Fiasco <a class="el" href="namespaceL4.html" title="L4 low-level kernel interface.">L4</a> implementation.
<a href="#details">More...</a></p>
<div id="dynsection-0" onclick="return dynsection.toggleVisibility(this)" class="dynheader closed" style="cursor:pointer;"><span class="dynarrow"><span class="arrowhead closed"></span></span>Collaboration diagram for Fiasco extensions:</div>
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<div id="dynsection-0-content" class="dyncontent" style="display:none;">
<div class="center"><iframe scrolling="no" loading="lazy" frameborder="0" src="group__api__calls__fiasco.svg" width="511" height="135"><p><b>This browser is not able to show SVG: try Firefox, Chrome, Safari, or Opera instead.</b></p></iframe></div>
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<table class="memberdecls">
<tr class="heading"><td colspan="2"><h2 id="header-groups" class="groupheader"><a id="groups" name="groups"></a>
Topics</h2></td></tr>
<tr class="memitem:l4_5Fdebugger_5Fapi" id="r_l4_5Fdebugger_5Fapi"><td class="memItemLeft" align="right" valign="top">&#160;</td><td class="memItemRight" valign="bottom"><a class="el" href="group__l4__debugger__api.html">Kernel Debugger </a></td></tr>
<tr class="memdesc:group__l4__debugger__api"><td class="mdescLeft">&#160;</td><td class="mdescRight">Kernel debugger related functionality. <br /></td></tr>
<tr class="memitem:fiasco_5Fdump_5Fapi" id="r_fiasco_5Fdump_5Fapi"><td class="memItemLeft" align="right" valign="top">&#160;</td><td class="memItemRight" valign="bottom"><a class="el" href="group__fiasco__dump__api.html">Kernel Information Dump </a></td></tr>
<tr class="memdesc:group__fiasco__dump__api"><td class="mdescLeft">&#160;</td><td class="mdescRight">Kernel information dumping related functionality. <br /></td></tr>
<tr class="memitem:fiasco_5Ftrace_5Fapi" id="r_fiasco_5Ftrace_5Fapi"><td class="memItemLeft" align="right" valign="top">&#160;</td><td class="memItemRight" valign="bottom"><a class="el" href="group__fiasco__trace__api.html">Kernel Tracing </a></td></tr>
<tr class="memdesc:group__fiasco__trace__api"><td class="mdescLeft">&#160;</td><td class="mdescRight">Kernel tracing related functionality. <br /></td></tr>
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<tr class="heading"><td colspan="2"><h2 id="header-files" class="groupheader"><a id="files" name="files"></a>
Files</h2></td></tr>
<tr class="memitem:_5F_5Fktrace-impl_2Eh" id="r__5F_5Fktrace-impl_2Eh"><td class="memItemLeft" align="right" valign="top">file &#160;</td><td class="memItemRight" valign="bottom"><a class="el" href="____ktrace-impl_8h.html">__ktrace-impl.h</a></td></tr>
<tr class="memdesc:____ktrace-impl_8h"><td class="mdescLeft">&#160;</td><td class="mdescRight"><a class="el" href="namespaceL4.html" title="L4 low-level kernel interface.">L4</a> kernel event tracing. <br /></td></tr>
<tr class="memitem:ktrace_2Eh" id="r_ktrace_2Eh"><td class="memItemLeft" align="right" valign="top">file &#160;</td><td class="memItemRight" valign="bottom"><a class="el" href="ktrace_8h.html">ktrace.h</a></td></tr>
<tr class="memdesc:ktrace_8h"><td class="mdescLeft">&#160;</td><td class="mdescRight"><a class="el" href="namespaceL4.html" title="L4 low-level kernel interface.">L4</a> kernel event tracing. <br /></td></tr>
<tr class="memitem:obj_5Finfo_2Eh" id="r_obj_5Finfo_2Eh"><td class="memItemLeft" align="right" valign="top">file &#160;</td><td class="memItemRight" valign="bottom"><a class="el" href="obj__info_8h.html">obj_info.h</a></td></tr>
<tr class="memdesc:obj__info_8h"><td class="mdescLeft">&#160;</td><td class="mdescRight">Debugger related functions. <br /></td></tr>
<tr class="memitem:segment_2Eh" id="r_segment_2Eh"><td class="memItemLeft" align="right" valign="top">file &#160;</td><td class="memItemRight" valign="bottom"><a class="el" href="amd64_2l4f_2l4_2sys_2segment_8h.html">segment.h</a></td></tr>
<tr class="memdesc:amd64_2l4f_2l4_2sys_2segment_8h"><td class="mdescLeft">&#160;</td><td class="mdescRight">l4f-specific fs/gs manipulation (AMD64). <br /></td></tr>
<tr class="memitem:segment_2Eh" id="r_segment_2Eh"><td class="memItemLeft" align="right" valign="top">file &#160;</td><td class="memItemRight" valign="bottom"><a class="el" href="amd64_2l4_2sys_2segment_8h.html">segment.h</a></td></tr>
<tr class="memdesc:amd64_2l4_2sys_2segment_8h"><td class="mdescLeft">&#160;</td><td class="mdescRight">Segment handling (AMD64). <br /></td></tr>
<tr class="memitem:segment_2Eh" id="r_segment_2Eh"><td class="memItemLeft" align="right" valign="top">file &#160;</td><td class="memItemRight" valign="bottom"><a class="el" href="x86_2l4f_2l4_2sys_2segment_8h.html">segment.h</a></td></tr>
<tr class="memdesc:x86_2l4f_2l4_2sys_2segment_8h"><td class="mdescLeft">&#160;</td><td class="mdescRight">l4f-specific segment manipulation (x86). <br /></td></tr>
<tr class="memitem:segment_2Eh" id="r_segment_2Eh"><td class="memItemLeft" align="right" valign="top">file &#160;</td><td class="memItemRight" valign="bottom"><a class="el" href="x86_2l4_2sys_2segment_8h.html">segment.h</a></td></tr>
<tr class="memdesc:x86_2l4_2sys_2segment_8h"><td class="mdescLeft">&#160;</td><td class="mdescRight">Segment handling (x86). <br /></td></tr>
</table><table class="memberdecls">
<tr class="heading"><td colspan="2"><h2 id="header-func-members" class="groupheader"><a id="func-members" name="func-members"></a>
Functions</h2></td></tr>
<tr class="memitem:ga394d6b4591383b0f6c78155e6e5e5180" id="r_ga394d6b4591383b0f6c78155e6e5e5180"><td class="memItemLeft" align="right" valign="top">long&#160;</td><td class="memItemRight" valign="bottom"><a class="el" href="#ga394d6b4591383b0f6c78155e6e5e5180">fiasco_ldt_set</a> (<a class="el" href="group__l4__cap__api.html#ga1445e923ce73029130d569d6e69a4dd8">l4_cap_idx_t</a> task, void *ldt, unsigned int num_desc, unsigned int entry_number_start, <a class="el" href="group__l4__utcb__api.html#ga89be8a86d11c1d532b636cc2df1330fb">l4_utcb_t</a> *utcb)</td></tr>
<tr class="memdesc:ga394d6b4591383b0f6c78155e6e5e5180"><td class="mdescLeft">&#160;</td><td class="mdescRight">Set LDT segments descriptors. <br /></td></tr>
<tr class="memitem:ga889e52253474f768149a012b94fac148" id="r_ga889e52253474f768149a012b94fac148"><td class="memItemLeft" align="right" valign="top">long&#160;</td><td class="memItemRight" valign="bottom"><a class="el" href="#ga889e52253474f768149a012b94fac148">fiasco_gdt_set</a> (<a class="el" href="group__l4__cap__api.html#ga1445e923ce73029130d569d6e69a4dd8">l4_cap_idx_t</a> thread, void *desc, unsigned int size, unsigned int entry_number_start, <a class="el" href="group__l4__utcb__api.html#ga89be8a86d11c1d532b636cc2df1330fb">l4_utcb_t</a> *utcb)</td></tr>
<tr class="memdesc:ga889e52253474f768149a012b94fac148"><td class="mdescLeft">&#160;</td><td class="mdescRight">Set GDT segment descriptors. <br /></td></tr>
<tr class="memitem:ga62cd4adfb0915e034d528472c73ad270" id="r_ga62cd4adfb0915e034d528472c73ad270"><td class="memItemLeft" align="right" valign="top">unsigned&#160;</td><td class="memItemRight" valign="bottom"><a class="el" href="#ga62cd4adfb0915e034d528472c73ad270">fiasco_gdt_get_entry_offset</a> (<a class="el" href="group__l4__cap__api.html#ga1445e923ce73029130d569d6e69a4dd8">l4_cap_idx_t</a> thread, <a class="el" href="group__l4__utcb__api.html#ga89be8a86d11c1d532b636cc2df1330fb">l4_utcb_t</a> *utcb)</td></tr>
<tr class="memdesc:ga62cd4adfb0915e034d528472c73ad270"><td class="mdescLeft">&#160;</td><td class="mdescRight">Return the offset of the entry in the GDT. <br /></td></tr>
</table>
<a name="details" id="details"></a><h2 id="header-details" class="groupheader">Detailed Description</h2>
<p>Extensions of the Fiasco <a class="el" href="namespaceL4.html" title="L4 low-level kernel interface.">L4</a> implementation. </p>
<a name="doc-func-members" id="doc-func-members"></a><h2 id="header-doc-func-members" class="groupheader">Function Documentation</h2>
<a id="ga62cd4adfb0915e034d528472c73ad270" name="ga62cd4adfb0915e034d528472c73ad270"></a>
<h2 class="memtitle"><span class="permalink"><a href="#ga62cd4adfb0915e034d528472c73ad270">&#9670;&#160;</a></span>fiasco_gdt_get_entry_offset()</h2>
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<td class="memname">unsigned fiasco_gdt_get_entry_offset </td>
<td>(</td>
<td class="paramtype"><a class="el" href="group__l4__cap__api.html#ga1445e923ce73029130d569d6e69a4dd8">l4_cap_idx_t</a></td> <td class="paramname"><span class="paramname"><em>thread</em></span>, </td>
</tr>
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<td class="paramkey"></td>
<td></td>
<td class="paramtype"><a class="el" href="group__l4__utcb__api.html#ga89be8a86d11c1d532b636cc2df1330fb">l4_utcb_t</a> *</td> <td class="paramname"><span class="paramname"><em>utcb</em></span>&#160;)</td>
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<p>Return the offset of the entry in the GDT. </p>
<dl class="params"><dt>Parameters</dt><dd>
<table class="params">
<tr><td class="paramname">thread</td><td>Thread to get info from. </td></tr>
<tr><td class="paramname">utcb</td><td>UTCB to be used for this operation, shall be the UTCB of the calling thread. See <a class="el" href="group__l4__utcb__api.html#gadc099b4a59e1d99638c72c11a8c8b644" title="Get the UTCB address.">l4_utcb</a>. </td></tr>
</table>
</dd>
</dl>
<p class="definition">Definition at line <a class="el" href="amd64_2l4_2sys_2segment_8h_source.html#l00166">166</a> of file <a class="el" href="amd64_2l4_2sys_2segment_8h_source.html">segment.h</a>.</p>
<p class="reference">References <a class="el" href="l4_2sys_2ipc_8h_source.html#l00565">l4_ipc_call()</a>, <a class="el" href="____timeout_8h_source.html#l00076">L4_IPC_NEVER</a>, <a class="el" href="l4_2sys_2types_8h_source.html#l00405">l4_msgtag()</a>, <a class="el" href="l4_2sys_2types_8h_source.html#l00054">L4_PROTO_THREAD</a>, and <a class="el" href="l4_2sys_2thread_8h_source.html#l00744">L4_THREAD_X86_GDT_OP</a>.</p>
<div id="dynsection-1" onclick="return dynsection.toggleVisibility(this)" class="dynheader closed" style="cursor:pointer;"><span class="dynarrow"><span class="arrowhead closed"></span></span>Here is the call graph for this function:</div>
<div id="dynsection-1-summary" class="dynsummary" style="display:block;">
</div>
<div id="dynsection-1-content" class="dyncontent" style="display:none;">
<div class="center"><iframe scrolling="no" loading="lazy" frameborder="0" src="group__api__calls__fiasco_ga62cd4adfb0915e034d528472c73ad270_cgraph.svg" width="415" height="86"><p><b>This browser is not able to show SVG: try Firefox, Chrome, Safari, or Opera instead.</b></p></iframe></div>
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<a id="ga889e52253474f768149a012b94fac148" name="ga889e52253474f768149a012b94fac148"></a>
<h2 class="memtitle"><span class="permalink"><a href="#ga889e52253474f768149a012b94fac148">&#9670;&#160;</a></span>fiasco_gdt_set()</h2>
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<td class="memname">long fiasco_gdt_set </td>
<td>(</td>
<td class="paramtype"><a class="el" href="group__l4__cap__api.html#ga1445e923ce73029130d569d6e69a4dd8">l4_cap_idx_t</a></td> <td class="paramname"><span class="paramname"><em>thread</em></span>, </td>
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<td class="paramtype">void *</td> <td class="paramname"><span class="paramname"><em>desc</em></span>, </td>
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<td class="paramtype">unsigned int</td> <td class="paramname"><span class="paramname"><em>size</em></span>, </td>
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<td class="paramtype">unsigned int</td> <td class="paramname"><span class="paramname"><em>entry_number_start</em></span>, </td>
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<td class="paramkey"></td>
<td></td>
<td class="paramtype"><a class="el" href="group__l4__utcb__api.html#ga89be8a86d11c1d532b636cc2df1330fb">l4_utcb_t</a> *</td> <td class="paramname"><span class="paramname"><em>utcb</em></span>&#160;)</td>
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<p>Set GDT segment descriptors. </p>
<p>Fiasco supports 4 consecutive entries, starting at the value returned by <a class="el" href="#ga62cd4adfb0915e034d528472c73ad270" title="Return the offset of the entry in the GDT.">fiasco_gdt_get_entry_offset()</a>.</p>
<dl class="params"><dt>Parameters</dt><dd>
<table class="params">
<tr><td class="paramname">thread</td><td>Thread to set the GDT entry for. </td></tr>
<tr><td class="paramname">desc</td><td>Pointer to GDT descriptors. </td></tr>
<tr><td class="paramname">size</td><td>Size of the descriptors in bytes (multiple of 8). </td></tr>
<tr><td class="paramname">entry_number_start</td><td>Entry number to start (valid values: 0-3). </td></tr>
<tr><td class="paramname">utcb</td><td>UTCB to be used for this operation, shall be the UTCB of the calling thread. See <a class="el" href="group__l4__utcb__api.html#gadc099b4a59e1d99638c72c11a8c8b644" title="Get the UTCB address.">l4_utcb</a>.</td></tr>
</table>
</dd>
</dl>
<dl class="retval"><dt>Return values</dt><dd>
<table class="retval">
<tr><td class="paramname">&lt;0</td><td>At least one provided GDT descriptor is considered unsafe by the kernel, and not all selected GDT descriptors have been updated. </td></tr>
<tr><td class="paramname">L4_EOK</td><td>Success. </td></tr>
</table>
</dd>
</dl>
<p class="definition">Definition at line <a class="el" href="amd64_2l4f_2l4_2sys_2segment_8h_source.html#l00041">41</a> of file <a class="el" href="amd64_2l4f_2l4_2sys_2segment_8h_source.html">segment.h</a>.</p>
<p class="reference">References <a class="el" href="l4_2sys_2ipc_8h_source.html#l00565">l4_ipc_call()</a>, <a class="el" href="____timeout_8h_source.html#l00076">L4_IPC_NEVER</a>, <a class="el" href="l4_2sys_2types_8h_source.html#l00405">l4_msgtag()</a>, <a class="el" href="l4_2sys_2types_8h_source.html#l00054">L4_PROTO_THREAD</a>, and <a class="el" href="l4_2sys_2thread_8h_source.html#l00744">L4_THREAD_X86_GDT_OP</a>.</p>
<div id="dynsection-2" onclick="return dynsection.toggleVisibility(this)" class="dynheader closed" style="cursor:pointer;"><span class="dynarrow"><span class="arrowhead closed"></span></span>Here is the call graph for this function:</div>
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<div id="dynsection-2-content" class="dyncontent" style="display:none;">
<div class="center"><iframe scrolling="no" loading="lazy" frameborder="0" src="group__api__calls__fiasco_ga889e52253474f768149a012b94fac148_cgraph.svg" width="372" height="86"><p><b>This browser is not able to show SVG: try Firefox, Chrome, Safari, or Opera instead.</b></p></iframe></div>
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<h2 class="memtitle"><span class="permalink"><a href="#ga394d6b4591383b0f6c78155e6e5e5180">&#9670;&#160;</a></span>fiasco_ldt_set()</h2>
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<td class="memname">long fiasco_ldt_set </td>
<td>(</td>
<td class="paramtype"><a class="el" href="group__l4__cap__api.html#ga1445e923ce73029130d569d6e69a4dd8">l4_cap_idx_t</a></td> <td class="paramname"><span class="paramname"><em>task</em></span>, </td>
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<td class="paramtype">void *</td> <td class="paramname"><span class="paramname"><em>ldt</em></span>, </td>
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<td class="paramtype">unsigned int</td> <td class="paramname"><span class="paramname"><em>num_desc</em></span>, </td>
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<td class="paramtype">unsigned int</td> <td class="paramname"><span class="paramname"><em>entry_number_start</em></span>, </td>
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<td class="paramtype"><a class="el" href="group__l4__utcb__api.html#ga89be8a86d11c1d532b636cc2df1330fb">l4_utcb_t</a> *</td> <td class="paramname"><span class="paramname"><em>utcb</em></span>&#160;)</td>
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<p>Set LDT segments descriptors. </p>
<dl class="params"><dt>Parameters</dt><dd>
<table class="params">
<tr><td class="paramname">task</td><td>Task to set the segment for. </td></tr>
<tr><td class="paramname">ldt</td><td>Pointer to LDT hardware descriptors. </td></tr>
<tr><td class="paramname">num_desc</td><td>Number of descriptors. </td></tr>
<tr><td class="paramname">entry_number_start</td><td>Entry number to start. </td></tr>
<tr><td class="paramname">utcb</td><td>UTCB to be used for this operation, shall be the UTCB of the calling thread. See <a class="el" href="group__l4__utcb__api.html#gadc099b4a59e1d99638c72c11a8c8b644" title="Get the UTCB address.">l4_utcb</a>.</td></tr>
</table>
</dd>
</dl>
<dl class="retval"><dt>Return values</dt><dd>
<table class="retval">
<tr><td class="paramname">-L4_ENOSYS</td><td>The kernel configuration doesn't support this feature. </td></tr>
<tr><td class="paramname">-L4_EINVAL</td><td>Invalid descriptor or invalid entry number. </td></tr>
<tr><td class="paramname">L4_EOK</td><td>Success.</td></tr>
</table>
</dd>
</dl>
<dl class="section note"><dt>Note</dt><dd>This feature is not available if the kernel is configured with page table isolation. </dd></dl>
<p class="definition">Definition at line <a class="el" href="amd64_2l4_2sys_2segment_8h_source.html#l00153">153</a> of file <a class="el" href="amd64_2l4_2sys_2segment_8h_source.html">segment.h</a>.</p>
<p class="reference">References <a class="el" href="err_8h_source.html#l00046">L4_EINVAL</a>, <a class="el" href="l4_2sys_2ipc_8h_source.html#l00565">l4_ipc_call()</a>, <a class="el" href="____timeout_8h_source.html#l00076">L4_IPC_NEVER</a>, <a class="el" href="l4_2sys_2types_8h_source.html#l00405">l4_msgtag()</a>, <a class="el" href="l4_2sys_2types_8h_source.html#l00053">L4_PROTO_TASK</a>, <a class="el" href="l4_2sys_2task_8h_source.html#l00347">L4_TASK_LDT_SET_X86_OP</a>, <a class="el" href="amd64_2l4_2sys_2segment_8h_source.html#l00078">L4_TASK_LDT_X86_ENTRY_SIZE</a>, and <a class="el" href="amd64_2l4_2sys_2segment_8h_source.html#l00080">L4_TASK_LDT_X86_MAX_ENTRIES</a>.</p>
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