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| <h5 class="subsubsection">9.41.3.7 Instruction Marker</h5> |
| |
| <p><a name="index-instruction-marker_002c-s390-2080"></a><a name="index-s390-instruction-marker-2081"></a> |
| The thread local storage instruction markers are used by the linker to |
| perform code optimization. |
| |
| <dl> |
| <dt><code>:tls_load</code><dd>The :tls_load marker is used to flag the load instruction in the initial |
| exec TLS model that retrieves the offset from the thread pointer to a |
| thread local storage variable from the GOT. |
| <br><dt><code>:tls_gdcall</code><dd>The :tls_gdcall marker is used to flag the branch-and-save instruction to |
| the __tls_get_offset function in the global dynamic TLS model. |
| <br><dt><code>:tls_ldcall</code><dd>The :tls_ldcall marker is used to flag the branch-and-save instruction to |
| the __tls_get_offset function in the local dynamic TLS model. |
| </dl> |
| |
| <p>For more information about the thread local storage instruction marker |
| and the linker optimizations see the ELF extension documentation |
| ‘<samp><span class="samp">ELF Handling For Thread-Local Storage</span></samp>’. |
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