c1e97bb458
a non-standard construct. Instead, redefine struct _ia64_fpreg as a union and put a long double in it. On ia64 and for LP64, this is defined by the ABI to have 16-byte alignment. For ILP32 a long double has 4-byte alignment, but we don't support ILP32. Note that the in-memory image of a long double does not match the in- memory image of spilled FP registers. This means that one cannot use the fpr_flt field to interpet the bits. For this reason we continue to use an aggregate type.
276 lines
7.1 KiB
C
276 lines
7.1 KiB
C
/*
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* Copyright (c) 2002, 2003 Marcel Moolenaar
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* All rights reserved.
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*
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* Redistribution and use in source and binary forms, with or without
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* modification, are permitted provided that the following conditions
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* are met:
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*
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* 1. Redistributions of source code must retain the above copyright
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* notice, this list of conditions and the following disclaimer.
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* 2. Redistributions in binary form must reproduce the above copyright
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* notice, this list of conditions and the following disclaimer in the
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* documentation and/or other materials provided with the distribution.
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*
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* THIS SOFTWARE IS PROVIDED BY THE AUTHOR ``AS IS'' AND ANY EXPRESS OR
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* IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED WARRANTIES
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* OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE DISCLAIMED.
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* IN NO EVENT SHALL THE AUTHOR BE LIABLE FOR ANY DIRECT, INDIRECT,
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* INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT
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* NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE,
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* DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY
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* THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT
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* (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE OF
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* THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
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*
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* $FreeBSD$
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*/
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#ifndef _MACHINE_REGSET_H_
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#define _MACHINE_REGSET_H_
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/*
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* Create register sets, based on the runtime specification. This allows
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* us to better reuse code and to copy sets around more efficiently.
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* Contexts are defined in terms of these sets. These include trapframe,
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* sigframe, pcb, mcontext, reg and fpreg. Other candidates are unwind
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* and coredump related contexts.
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*
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* Notes:
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* o Constant registers (r0, f0 and f1) are not accounted for,
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* o The stacked registers (r32-r127) are not accounted for,
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* o Predicates are not split across sets.
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*/
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/* A single FP register. */
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union _ia64_fpreg {
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unsigned char fpr_bits[16];
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long double fpr_flt;
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};
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/*
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* Special registers.
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*/
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struct _special {
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unsigned long sp;
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unsigned long unat; /* NaT before spilling */
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unsigned long rp;
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unsigned long pr;
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unsigned long pfs;
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unsigned long bspstore;
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unsigned long rnat;
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unsigned long __spare;
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/* Userland context and syscalls */
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unsigned long tp;
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unsigned long rsc;
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unsigned long fpsr;
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unsigned long psr;
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/* ASYNC: Interrupt specific */
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unsigned long gp;
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unsigned long ndirty;
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unsigned long cfm;
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unsigned long iip;
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unsigned long ifa;
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unsigned long isr;
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};
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struct _high_fp {
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union _ia64_fpreg fr32;
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union _ia64_fpreg fr33;
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union _ia64_fpreg fr34;
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union _ia64_fpreg fr35;
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union _ia64_fpreg fr36;
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union _ia64_fpreg fr37;
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union _ia64_fpreg fr38;
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union _ia64_fpreg fr39;
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union _ia64_fpreg fr40;
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union _ia64_fpreg fr41;
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union _ia64_fpreg fr42;
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union _ia64_fpreg fr43;
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union _ia64_fpreg fr44;
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union _ia64_fpreg fr45;
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union _ia64_fpreg fr46;
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union _ia64_fpreg fr47;
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union _ia64_fpreg fr48;
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union _ia64_fpreg fr49;
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union _ia64_fpreg fr50;
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union _ia64_fpreg fr51;
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union _ia64_fpreg fr52;
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union _ia64_fpreg fr53;
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union _ia64_fpreg fr54;
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union _ia64_fpreg fr55;
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union _ia64_fpreg fr56;
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union _ia64_fpreg fr57;
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union _ia64_fpreg fr58;
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union _ia64_fpreg fr59;
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union _ia64_fpreg fr60;
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union _ia64_fpreg fr61;
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union _ia64_fpreg fr62;
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union _ia64_fpreg fr63;
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union _ia64_fpreg fr64;
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union _ia64_fpreg fr65;
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union _ia64_fpreg fr66;
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union _ia64_fpreg fr67;
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union _ia64_fpreg fr68;
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union _ia64_fpreg fr69;
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union _ia64_fpreg fr70;
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union _ia64_fpreg fr71;
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union _ia64_fpreg fr72;
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union _ia64_fpreg fr73;
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union _ia64_fpreg fr74;
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union _ia64_fpreg fr75;
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union _ia64_fpreg fr76;
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union _ia64_fpreg fr77;
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union _ia64_fpreg fr78;
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union _ia64_fpreg fr79;
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union _ia64_fpreg fr80;
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union _ia64_fpreg fr81;
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union _ia64_fpreg fr82;
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union _ia64_fpreg fr83;
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union _ia64_fpreg fr84;
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union _ia64_fpreg fr85;
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union _ia64_fpreg fr86;
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union _ia64_fpreg fr87;
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union _ia64_fpreg fr88;
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union _ia64_fpreg fr89;
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union _ia64_fpreg fr90;
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union _ia64_fpreg fr91;
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union _ia64_fpreg fr92;
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union _ia64_fpreg fr93;
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union _ia64_fpreg fr94;
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union _ia64_fpreg fr95;
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union _ia64_fpreg fr96;
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union _ia64_fpreg fr97;
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union _ia64_fpreg fr98;
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union _ia64_fpreg fr99;
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union _ia64_fpreg fr100;
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union _ia64_fpreg fr101;
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union _ia64_fpreg fr102;
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union _ia64_fpreg fr103;
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union _ia64_fpreg fr104;
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union _ia64_fpreg fr105;
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union _ia64_fpreg fr106;
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union _ia64_fpreg fr107;
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union _ia64_fpreg fr108;
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union _ia64_fpreg fr109;
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union _ia64_fpreg fr110;
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union _ia64_fpreg fr111;
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union _ia64_fpreg fr112;
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union _ia64_fpreg fr113;
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union _ia64_fpreg fr114;
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union _ia64_fpreg fr115;
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union _ia64_fpreg fr116;
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union _ia64_fpreg fr117;
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union _ia64_fpreg fr118;
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union _ia64_fpreg fr119;
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union _ia64_fpreg fr120;
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union _ia64_fpreg fr121;
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union _ia64_fpreg fr122;
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union _ia64_fpreg fr123;
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union _ia64_fpreg fr124;
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union _ia64_fpreg fr125;
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union _ia64_fpreg fr126;
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union _ia64_fpreg fr127;
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};
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/*
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* Preserved registers.
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*/
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struct _callee_saved {
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unsigned long unat; /* NaT after spilling. */
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unsigned long gr4;
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unsigned long gr5;
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unsigned long gr6;
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unsigned long gr7;
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unsigned long br1;
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unsigned long br2;
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unsigned long br3;
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unsigned long br4;
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unsigned long br5;
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unsigned long lc;
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unsigned long __spare;
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};
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struct _callee_saved_fp {
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union _ia64_fpreg fr2;
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union _ia64_fpreg fr3;
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union _ia64_fpreg fr4;
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union _ia64_fpreg fr5;
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union _ia64_fpreg fr16;
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union _ia64_fpreg fr17;
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union _ia64_fpreg fr18;
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union _ia64_fpreg fr19;
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union _ia64_fpreg fr20;
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union _ia64_fpreg fr21;
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union _ia64_fpreg fr22;
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union _ia64_fpreg fr23;
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union _ia64_fpreg fr24;
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union _ia64_fpreg fr25;
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union _ia64_fpreg fr26;
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union _ia64_fpreg fr27;
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union _ia64_fpreg fr28;
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union _ia64_fpreg fr29;
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union _ia64_fpreg fr30;
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union _ia64_fpreg fr31;
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};
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/*
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* Scratch registers.
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*/
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struct _caller_saved {
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unsigned long unat; /* NaT after spilling. */
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unsigned long gr2;
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unsigned long gr3;
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unsigned long gr8;
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unsigned long gr9;
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unsigned long gr10;
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unsigned long gr11;
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unsigned long gr14;
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unsigned long gr15;
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unsigned long gr16;
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unsigned long gr17;
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unsigned long gr18;
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unsigned long gr19;
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unsigned long gr20;
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unsigned long gr21;
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unsigned long gr22;
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unsigned long gr23;
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unsigned long gr24;
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unsigned long gr25;
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unsigned long gr26;
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unsigned long gr27;
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unsigned long gr28;
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unsigned long gr29;
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unsigned long gr30;
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unsigned long gr31;
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unsigned long br6;
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unsigned long br7;
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unsigned long ccv;
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unsigned long csd;
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unsigned long ssd;
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};
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struct _caller_saved_fp {
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union _ia64_fpreg fr6;
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union _ia64_fpreg fr7;
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union _ia64_fpreg fr8;
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union _ia64_fpreg fr9;
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union _ia64_fpreg fr10;
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union _ia64_fpreg fr11;
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union _ia64_fpreg fr12;
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union _ia64_fpreg fr13;
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union _ia64_fpreg fr14;
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union _ia64_fpreg fr15;
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};
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#ifdef _KERNEL
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void restore_callee_saved(const struct _callee_saved *);
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void restore_callee_saved_fp(const struct _callee_saved_fp *);
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void restore_high_fp(const struct _high_fp *);
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void save_callee_saved(struct _callee_saved *);
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void save_callee_saved_fp(struct _callee_saved_fp *);
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void save_high_fp(struct _high_fp *);
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#endif
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#endif /* _MACHINE_REGSET_H_ */
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