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Fix process_{read,write}_fpregs().

This commit is contained in:
mycroft 1998-01-24 12:11:15 +00:00
parent 5ab55e91b7
commit 4b8a102fbb
1 changed files with 24 additions and 13 deletions
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37
sys/arch/i386/i386/process_machdep.c
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@ -1,7 +1,7 @@
/* $NetBSD: process_machdep.c,v 1.24 1998/01/15 22:25:59 thorpej Exp $ */
/* $NetBSD: process_machdep.c,v 1.25 1998/01/24 12:11:15 mycroft Exp $ */
/*
* Copyright (c) 1995, 1996, 1997
* Copyright (c) 1995, 1996, 1997, 1998
* Charles M. Hannum. All rights reserved.
* Copyright (c) 1993 The Regents of the University of California.
* Copyright (c) 1993 Jan-Simon Pendry
@ -65,6 +65,7 @@
*/
#include "opt_vm86.h"
#include "npx.h"
#include <sys/param.h>
#include <sys/systm.h>
@ -146,19 +147,25 @@ process_read_fpregs(p, regs)
struct proc *p;
struct fpreg *regs;
{
struct save87 *frame = process_fpframe(p);
if (p->p_md.md_flags & MDP_USEDFPU) {
struct save87 *frame = process_fpframe(p);
#if NNPX > 0
extern struct proc *npxproc;
if (npxproc == p)
npxsave();
#endif
} else {
/* Fake a FNINIT. */
bzero(frame, sizeof(*frame));
frame->sv_env.en_cw = __INITIAL_NPXCW__;
frame->sv_env.en_sw = 0;
frame->sv_env.en_tw = 0xffff;
p->p_md.md_flags |= MDP_USEDFPU;
}
bcopy(frame, regs, sizeof(frame));
} else
bzero(regs, sizeof(regs));
bcopy(frame, regs, sizeof(*regs));
return (0);
}
@ -234,14 +241,18 @@ process_write_fpregs(p, regs)
{
struct save87 *frame = process_fpframe(p);
if (p->p_md.md_flags & MDP_USEDFPU) {
#if NNPX > 0
if (npxproc == p)
npxdrop();
extern struct proc *npxproc;
if (npxproc == p)
npxdrop();
#endif
} else {
p->p_md.md_flags |= MDP_USEDFPU;
}
p->p_md.md_flags |= MDP_USEDFPU;
bcopy(regs, frame, sizeof(frame));
bcopy(regs, frame, sizeof(*regs));
return (0);
}