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128 lines
7.2 KiB
HTML
128 lines
7.2 KiB
HTML
4 years ago
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<!DOCTYPE html PUBLIC "-//W3C//DTD HTML 4.01 Transitional//EN" "http://www.w3.org/TR/html4/loose.dtd">
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<html>
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<!-- Copyright (C) 1988-2019 Free Software Foundation, Inc.
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Permission is granted to copy, distribute and/or modify this document
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under the terms of the GNU Free Documentation License, Version 1.3 or
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any later version published by the Free Software Foundation; with the
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Invariant Sections being "Free Software" and "Free Software Needs
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Free Documentation", with the Front-Cover Texts being "A GNU Manual,"
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and with the Back-Cover Texts as in (a) below.
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(a) The FSF's Back-Cover Text is: "You are free to copy and modify
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this GNU Manual. Buying copies from GNU Press supports the FSF in
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developing GNU and promoting software freedom." -->
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<!-- Created by GNU Texinfo 6.4, http://www.gnu.org/software/texinfo/ -->
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<head>
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<title>S/390 and System z Features (Debugging with GDB)</title>
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<meta name="description" content="S/390 and System z Features (Debugging with GDB)">
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<meta name="keywords" content="S/390 and System z Features (Debugging with GDB)">
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<meta name="resource-type" content="document">
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<meta name="distribution" content="global">
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<meta name="Generator" content="makeinfo">
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<meta http-equiv="Content-Type" content="text/html; charset=utf-8">
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<link href="index.html#Top" rel="start" title="Top">
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<link href="Concept-Index.html#Concept-Index" rel="index" title="Concept Index">
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<link href="index.html#SEC_Contents" rel="contents" title="Table of Contents">
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<link href="Standard-Target-Features.html#Standard-Target-Features" rel="up" title="Standard Target Features">
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<link href="Sparc-Features.html#Sparc-Features" rel="next" title="Sparc Features">
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<link href="RISC_002dV-Features.html#RISC_002dV-Features" rel="prev" title="RISC-V Features">
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<style type="text/css">
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</style>
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</head>
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<body lang="en">
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<a name="S_002f390-and-System-z-Features"></a>
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<div class="header">
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<p>
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Next: <a href="Sparc-Features.html#Sparc-Features" accesskey="n" rel="next">Sparc Features</a>, Previous: <a href="RISC_002dV-Features.html#RISC_002dV-Features" accesskey="p" rel="prev">RISC-V Features</a>, Up: <a href="Standard-Target-Features.html#Standard-Target-Features" accesskey="u" rel="up">Standard Target Features</a> [<a href="index.html#SEC_Contents" title="Table of contents" rel="contents">Contents</a>][<a href="Concept-Index.html#Concept-Index" title="Index" rel="index">Index</a>]</p>
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</div>
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<hr>
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<a name="S_002f390-and-System-z-Features-1"></a>
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<h4 class="subsection">G.5.13 S/390 and System z Features</h4>
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<a name="index-target-descriptions_002c-S_002f390-features"></a>
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<a name="index-target-descriptions_002c-System-z-features"></a>
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<p>The ‘<samp>org.gnu.gdb.s390.core</samp>’ feature is required for S/390 and
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System z targets. It should contain the PSW and the 16 general
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registers. In particular, System z targets should provide the 64-bit
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registers ‘<samp>pswm</samp>’, ‘<samp>pswa</samp>’, and ‘<samp>r0</samp>’ through ‘<samp>r15</samp>’.
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S/390 targets should provide the 32-bit versions of these registers.
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A System z target that runs in 31-bit addressing mode should provide
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32-bit versions of ‘<samp>pswm</samp>’ and ‘<samp>pswa</samp>’, as well as the general
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register’s upper halves ‘<samp>r0h</samp>’ through ‘<samp>r15h</samp>’, and their
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lower halves ‘<samp>r0l</samp>’ through ‘<samp>r15l</samp>’.
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</p>
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<p>The ‘<samp>org.gnu.gdb.s390.fpr</samp>’ feature is required. It should
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contain the 64-bit registers ‘<samp>f0</samp>’ through ‘<samp>f15</samp>’, and
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‘<samp>fpc</samp>’.
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</p>
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<p>The ‘<samp>org.gnu.gdb.s390.acr</samp>’ feature is required. It should
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contain the 32-bit registers ‘<samp>acr0</samp>’ through ‘<samp>acr15</samp>’.
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</p>
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<p>The ‘<samp>org.gnu.gdb.s390.linux</samp>’ feature is optional. It should
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contain the register ‘<samp>orig_r2</samp>’, which is 64-bit wide on System z
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targets and 32-bit otherwise. In addition, the feature may contain
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the ‘<samp>last_break</samp>’ register, whose width depends on the addressing
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mode, as well as the ‘<samp>system_call</samp>’ register, which is always
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32-bit wide.
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</p>
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<p>The ‘<samp>org.gnu.gdb.s390.tdb</samp>’ feature is optional. It should
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contain the 64-bit registers ‘<samp>tdb0</samp>’, ‘<samp>tac</samp>’, ‘<samp>tct</samp>’,
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‘<samp>atia</samp>’, and ‘<samp>tr0</samp>’ through ‘<samp>tr15</samp>’.
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</p>
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<p>The ‘<samp>org.gnu.gdb.s390.vx</samp>’ feature is optional. It should contain
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64-bit wide registers ‘<samp>v0l</samp>’ through ‘<samp>v15l</samp>’, which will be
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combined by <small>GDB</small> with the floating point registers ‘<samp>f0</samp>’
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through ‘<samp>f15</samp>’ to present the 128-bit wide vector registers
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‘<samp>v0</samp>’ through ‘<samp>v15</samp>’. In addition, this feature should
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contain the 128-bit wide vector registers ‘<samp>v16</samp>’ through
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‘<samp>v31</samp>’.
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</p>
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<p>The ‘<samp>org.gnu.gdb.s390.gs</samp>’ feature is optional. It should contain
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the 64-bit wide guarded-storage-control registers ‘<samp>gsd</samp>’,
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‘<samp>gssm</samp>’, and ‘<samp>gsepla</samp>’.
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</p>
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<p>The ‘<samp>org.gnu.gdb.s390.gsbc</samp>’ feature is optional. It should contain
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the 64-bit wide guarded-storage broadcast control registers
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‘<samp>bc_gsd</samp>’, ‘<samp>bc_gssm</samp>’, and ‘<samp>bc_gsepla</samp>’.
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</p>
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<hr>
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<div class="header">
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<p>
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Next: <a href="Sparc-Features.html#Sparc-Features" accesskey="n" rel="next">Sparc Features</a>, Previous: <a href="RISC_002dV-Features.html#RISC_002dV-Features" accesskey="p" rel="prev">RISC-V Features</a>, Up: <a href="Standard-Target-Features.html#Standard-Target-Features" accesskey="u" rel="up">Standard Target Features</a> [<a href="index.html#SEC_Contents" title="Table of contents" rel="contents">Contents</a>][<a href="Concept-Index.html#Concept-Index" title="Index" rel="index">Index</a>]</p>
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</div>
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</body>
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</html>
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