| <html lang="en"> |
| <head> |
| <title>S/390 and System z Features - Debugging with GDB</title> |
| <meta http-equiv="Content-Type" content="text/html"> |
| <meta name="description" content="Debugging with GDB"> |
| <meta name="generator" content="makeinfo 4.13"> |
| <link title="Top" rel="start" href="index.html#Top"> |
| <link rel="up" href="Standard-Target-Features.html#Standard-Target-Features" title="Standard Target Features"> |
| <link rel="prev" href="RISC_002dV-Features.html#RISC_002dV-Features" title="RISC-V Features"> |
| <link rel="next" href="Sparc-Features.html#Sparc-Features" title="Sparc Features"> |
| <link href="http://www.gnu.org/software/texinfo/" rel="generator-home" title="Texinfo Homepage"> |
| <!-- |
| Copyright (C) 1988-2019 Free Software Foundation, Inc. |
| |
| Permission is granted to copy, distribute and/or modify this document |
| under the terms of the GNU Free Documentation License, Version 1.3 or |
| any later version published by the Free Software Foundation; with the |
| Invariant Sections being ``Free Software'' and ``Free Software Needs |
| Free Documentation'', with the Front-Cover Texts being ``A GNU Manual,'' |
| and with the Back-Cover Texts as in (a) below. |
| |
| (a) The FSF's Back-Cover Text is: ``You are free to copy and modify |
| this GNU Manual. Buying copies from GNU Press supports the FSF in |
| developing GNU and promoting software freedom.'' |
| --> |
| <meta http-equiv="Content-Style-Type" content="text/css"> |
| <style type="text/css"><!-- |
| pre.display { font-family:inherit } |
| pre.format { font-family:inherit } |
| pre.smalldisplay { font-family:inherit; font-size:smaller } |
| pre.smallformat { font-family:inherit; font-size:smaller } |
| pre.smallexample { font-size:smaller } |
| pre.smalllisp { font-size:smaller } |
| span.sc { font-variant:small-caps } |
| span.roman { font-family:serif; font-weight:normal; } |
| span.sansserif { font-family:sans-serif; font-weight:normal; } |
| --></style> |
| </head> |
| <body> |
| <div class="node"> |
| <a name="S%2f390-and-System-z-Features"></a> |
| <a name="S_002f390-and-System-z-Features"></a> |
| <p> |
| Next: <a rel="next" accesskey="n" href="Sparc-Features.html#Sparc-Features">Sparc Features</a>, |
| Previous: <a rel="previous" accesskey="p" href="RISC_002dV-Features.html#RISC_002dV-Features">RISC-V Features</a>, |
| Up: <a rel="up" accesskey="u" href="Standard-Target-Features.html#Standard-Target-Features">Standard Target Features</a> |
| <hr> |
| </div> |
| |
| <h4 class="subsection">G.5.13 S/390 and System z Features</h4> |
| |
| <p><a name="index-target-descriptions_002c-S_002f390-features-3670"></a><a name="index-target-descriptions_002c-System-z-features-3671"></a> |
| The ‘<samp><span class="samp">org.gnu.gdb.s390.core</span></samp>’ feature is required for S/390 and |
| System z targets. It should contain the PSW and the 16 general |
| registers. In particular, System z targets should provide the 64-bit |
| registers ‘<samp><span class="samp">pswm</span></samp>’, ‘<samp><span class="samp">pswa</span></samp>’, and ‘<samp><span class="samp">r0</span></samp>’ through ‘<samp><span class="samp">r15</span></samp>’. |
| S/390 targets should provide the 32-bit versions of these registers. |
| A System z target that runs in 31-bit addressing mode should provide |
| 32-bit versions of ‘<samp><span class="samp">pswm</span></samp>’ and ‘<samp><span class="samp">pswa</span></samp>’, as well as the general |
| register's upper halves ‘<samp><span class="samp">r0h</span></samp>’ through ‘<samp><span class="samp">r15h</span></samp>’, and their |
| lower halves ‘<samp><span class="samp">r0l</span></samp>’ through ‘<samp><span class="samp">r15l</span></samp>’. |
| |
| <p>The ‘<samp><span class="samp">org.gnu.gdb.s390.fpr</span></samp>’ feature is required. It should |
| contain the 64-bit registers ‘<samp><span class="samp">f0</span></samp>’ through ‘<samp><span class="samp">f15</span></samp>’, and |
| ‘<samp><span class="samp">fpc</span></samp>’. |
| |
| <p>The ‘<samp><span class="samp">org.gnu.gdb.s390.acr</span></samp>’ feature is required. It should |
| contain the 32-bit registers ‘<samp><span class="samp">acr0</span></samp>’ through ‘<samp><span class="samp">acr15</span></samp>’. |
| |
| <p>The ‘<samp><span class="samp">org.gnu.gdb.s390.linux</span></samp>’ feature is optional. It should |
| contain the register ‘<samp><span class="samp">orig_r2</span></samp>’, which is 64-bit wide on System z |
| targets and 32-bit otherwise. In addition, the feature may contain |
| the ‘<samp><span class="samp">last_break</span></samp>’ register, whose width depends on the addressing |
| mode, as well as the ‘<samp><span class="samp">system_call</span></samp>’ register, which is always |
| 32-bit wide. |
| |
| <p>The ‘<samp><span class="samp">org.gnu.gdb.s390.tdb</span></samp>’ feature is optional. It should |
| contain the 64-bit registers ‘<samp><span class="samp">tdb0</span></samp>’, ‘<samp><span class="samp">tac</span></samp>’, ‘<samp><span class="samp">tct</span></samp>’, |
| ‘<samp><span class="samp">atia</span></samp>’, and ‘<samp><span class="samp">tr0</span></samp>’ through ‘<samp><span class="samp">tr15</span></samp>’. |
| |
| <p>The ‘<samp><span class="samp">org.gnu.gdb.s390.vx</span></samp>’ feature is optional. It should contain |
| 64-bit wide registers ‘<samp><span class="samp">v0l</span></samp>’ through ‘<samp><span class="samp">v15l</span></samp>’, which will be |
| combined by <span class="sc">gdb</span> with the floating point registers ‘<samp><span class="samp">f0</span></samp>’ |
| through ‘<samp><span class="samp">f15</span></samp>’ to present the 128-bit wide vector registers |
| ‘<samp><span class="samp">v0</span></samp>’ through ‘<samp><span class="samp">v15</span></samp>’. In addition, this feature should |
| contain the 128-bit wide vector registers ‘<samp><span class="samp">v16</span></samp>’ through |
| ‘<samp><span class="samp">v31</span></samp>’. |
| |
| <p>The ‘<samp><span class="samp">org.gnu.gdb.s390.gs</span></samp>’ feature is optional. It should contain |
| the 64-bit wide guarded-storage-control registers ‘<samp><span class="samp">gsd</span></samp>’, |
| ‘<samp><span class="samp">gssm</span></samp>’, and ‘<samp><span class="samp">gsepla</span></samp>’. |
| |
| <p>The ‘<samp><span class="samp">org.gnu.gdb.s390.gsbc</span></samp>’ feature is optional. It should contain |
| the 64-bit wide guarded-storage broadcast control registers |
| ‘<samp><span class="samp">bc_gsd</span></samp>’, ‘<samp><span class="samp">bc_gssm</span></samp>’, and ‘<samp><span class="samp">bc_gsepla</span></samp>’. |
| |
| </body></html> |
| |
