<html> <head> <meta http-equiv="Content-Type" content="text/html; charset=ISO-8859-1"> <title>8. README.S390</title> <link rel="stylesheet" type="text/css" href="vg_basic.css"> <meta name="generator" content="DocBook XSL Stylesheets V1.78.1"> <link rel="home" href="index.html" title="Valgrind Documentation"> <link rel="up" href="dist.html" title="Valgrind Distribution Documents"> <link rel="prev" href="dist.readme-packagers.html" title="7. README_PACKAGERS"> <link rel="next" href="dist.readme-android.html" title="9. README.android"> </head> <body bgcolor="white" text="black" link="#0000FF" vlink="#840084" alink="#0000FF"> <div><table class="nav" width="100%" cellspacing="3" cellpadding="3" border="0" summary="Navigation header"><tr> <td width="22px" align="center" valign="middle"><a accesskey="p" href="dist.readme-packagers.html"><img src="images/prev.png" width="18" height="21" border="0" alt="Prev"></a></td> <td width="25px" align="center" valign="middle"><a accesskey="u" href="dist.html"><img src="images/up.png" width="21" height="18" border="0" alt="Up"></a></td> <td width="31px" align="center" valign="middle"><a accesskey="h" href="index.html"><img src="images/home.png" width="27" height="20" border="0" alt="Up"></a></td> <th align="center" valign="middle">Valgrind Distribution Documents</th> <td width="22px" align="center" valign="middle"><a accesskey="n" href="dist.readme-android.html"><img src="images/next.png" width="18" height="21" border="0" alt="Next"></a></td> </tr></table></div> <div class="chapter"> <div class="titlepage"><div><div><h1 class="title"> <a name="dist.readme-s390"></a>8. README.S390</h1></div></div></div> <div class="literallayout"><p><br> <br> Requirements<br> ------------<br> - You need GCC 3.4 or later to compile the s390 port.<br> - To run valgrind a z10 machine or any later model is recommended.<br> Older machine models down to and including z990 may work but have<br> not been tested extensively.<br> <br> <br> Limitations<br> -----------<br> - 31-bit client programs are not supported.<br> - Hexadecimal floating point is not supported.<br> - Transactional memory is not supported.<br> - Instructions operating on vector registers are not supported.<br> - memcheck, cachegrind, drd, helgrind, massif, lackey, and none are<br> supported. <br> - On machine models predating z10, cachegrind will assume a z10 cache<br> architecture. Otherwise, cachegrind will query the hosts cache system<br> and use those parameters.<br> - callgrind and all experimental tools are currently not supported.<br> - Some gcc versions use mvc to copy 4/8 byte values. This will affect<br> certain debug messages. For example, memcheck will complain about<br> 4 one-byte reads/writes instead of just a single read/write.<br> <br> <br> Hardware facilities<br> -------------------<br> Valgrind does not require that the host machine has the same hardware<br> facilities as the machine for which the client program was compiled.<br> This is convenient. If possible, the JIT compiler will translate the<br> client instructions according to the facilities available on the host.<br> This means, though, that probing for hardware facilities by issuing<br> instructions from that facility and observing whether SIGILL is thrown<br> may not work. As a consequence, programs that attempt to do so may<br> behave differently. It is believed that this is a rare use case.<br> <br> <br> Recommendations<br> ---------------<br> Applications should be compiled with -fno-builtin to avoid<br> false positives due to builtin string operations when running memcheck.<br> <br> <br> Reading Material<br> ----------------<br> (1) Linux for zSeries ELF ABI Supplement<br> http://refspecs.linuxfoundation.org/ELF/zSeries/index.html<br> (2) z/Architecture Principles of Operation<br> http://publibfi.boulder.ibm.com/epubs/pdf/dz9zr010.pdf<br> (3) z/Architecture Reference Summary<br> http://publibfi.boulder.ibm.com/epubs/pdf/dz9zs008.pdf<br> <br> </p></div> </div> <div> <br><table class="nav" width="100%" cellspacing="3" cellpadding="2" border="0" summary="Navigation footer"> <tr> <td rowspan="2" width="40%" align="left"> <a accesskey="p" href="dist.readme-packagers.html"><< 7. README_PACKAGERS</a> </td> <td width="20%" align="center"><a accesskey="u" href="dist.html">Up</a></td> <td rowspan="2" width="40%" align="right"> <a accesskey="n" href="dist.readme-android.html">9. README.android >></a> </td> </tr> <tr><td width="20%" align="center"><a accesskey="h" href="index.html">Home</a></td></tr> </table> </div> </body> </html>