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In cpu_getmcontext, make sure the returned MSR has the FP exception mode

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(PSL_FE0|PSL_FE1) saved in the PSL.  In cpu_setmcontext, copy the FP
exception bits to the PCB where they live.
This commit is contained in:
matt 2004-04-04 17:26:10 +00:00
parent 847bed9428
commit 481d181cd4
1 changed files with 13 additions and 2 deletions
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15
sys/arch/powerpc/powerpc/sig_machdep.c
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@ -1,4 +1,4 @@
/* $NetBSD: sig_machdep.c,v 1.20 2004/04/04 17:20:15 matt Exp $ */
/* $NetBSD: sig_machdep.c,v 1.21 2004/04/04 17:26:10 matt Exp $ */
/*
* Copyright (C) 1995, 1996 Wolfgang Solfrank.
@ -32,7 +32,7 @@
*/
#include <sys/cdefs.h>
__KERNEL_RCSID(0, "$NetBSD: sig_machdep.c,v 1.20 2004/04/04 17:20:15 matt Exp $");
__KERNEL_RCSID(0, "$NetBSD: sig_machdep.c,v 1.21 2004/04/04 17:26:10 matt Exp $");
#include "opt_compat_netbsd.h"
#include "opt_ppcarch.h"
@ -160,6 +160,9 @@ cpu_getmcontext(struct lwp *l, mcontext_t *mcp, unsigned int *flagp)
gr[_REG_LR] = tf->lr;
gr[_REG_PC] = tf->srr0;
gr[_REG_MSR] = tf->srr1;
#ifdef PPC_HAVE_FPU
gr[_REG_MSR] |= pcb->pcb_flags & (PCB_FE0|PCB_FE1);
#endif
gr[_REG_CTR] = tf->ctr;
gr[_REG_XER] = tf->xer;
#ifdef PPC_OEA
@ -204,6 +207,14 @@ cpu_setmcontext(struct lwp *l, const mcontext_t *mcp, unsigned int flags)
(tf->srr1 & PSL_USERSTATIC))
return (EINVAL);
#ifdef PPC_HAVE_FPU
/*
* Always save the FP exception mode in the PCB.
*/
pcb->pcb_flags &= ~(PCB_FE0|PCB_FE1);
pcb->pcb_flags |= gr[_REG_MSR] & (PCB_FE0|PCB_FE1);
#endif
(void)memcpy(&tf->fixreg, gr, 32 * sizeof (gr[0]));
tf->cr = gr[_REG_CR];
tf->lr = gr[_REG_LR];