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Make sure that the SRR1 we pass to userland reflects PSL_FE0|PSL_FE1 even 

if the lwp doesn't currently own the FPU.  When returning, copy those bits
back to the PCB.  (In case the user decided to the FP exception mode in the
signal handler).
This commit is contained in:
matt 2004-04-04 17:10:32 +00:00
parent d1001802a5
commit 7681ce429d
1 changed files with 9 additions and 2 deletions
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11
sys/arch/powerpc/powerpc/compat_16_machdep.c
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@ -1,4 +1,4 @@
/* $NetBSD: compat_16_machdep.c,v 1.2 2003/09/25 22:22:36 matt Exp $ */
/* $NetBSD: compat_16_machdep.c,v 1.3 2004/04/04 17:10:32 matt Exp $ */
/*
* Copyright (C) 1995, 1996 Wolfgang Solfrank.
@ -32,7 +32,7 @@
*/
#include <sys/cdefs.h>
__KERNEL_RCSID(0, "$NetBSD: compat_16_machdep.c,v 1.2 2003/09/25 22:22:36 matt Exp $");
__KERNEL_RCSID(0, "$NetBSD: compat_16_machdep.c,v 1.3 2004/04/04 17:10:32 matt Exp $");
#include "opt_compat_netbsd.h"
#include "opt_ppcarch.h"
@ -87,6 +87,9 @@ sendsig_sigcontext(int sig, const sigset_t *mask, u_long code)
utf->ctr = tf->ctr;
utf->srr0 = tf->srr0;
utf->srr1 = tf->srr1;
#ifdef PPC_HAVE_FPU
utf->srr1 |= l->l_addr->u_pcb.pcb_flags & (PCB_FE0|PCB_FE1);
#endif
#ifdef PPC_OEA
utf->vrsave = tf->tf_xtra[TF_VRSAVE];
utf->mq = tf->tf_xtra[TF_MQ];
@ -188,6 +191,10 @@ compat_16_sys___sigreturn14(struct lwp *l, void *v, register_t *retval)
tf->ctr = utf->ctr;
tf->srr0 = utf->srr0;
tf->srr1 = utf->srr1;
#ifdef PPC_HAVE_FPU
l->l_addr->u_pcb.pcb_flags &= ~(PCB_FE0|PCB_FE1);
l->l_addr->u_pcb.pcb_flags |= utf->srr1 & (PCB_FE0|PCB_FE1);
#endif
#ifdef PPC_OEA
tf->tf_xtra[TF_VRSAVE] = utf->vrsave;
tf->tf_xtra[TF_MQ] = utf->mq;