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Ensure FP state is reset, if FP is used in a signal handler. 

Fixes PR kern/39299 for 32bit code.
This commit is contained in:
mlelstv 2009-09-25 13:56:32 +00:00
parent aef222ecba
commit f4d53c7199
1 changed files with 8 additions and 2 deletions
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10
sys/arch/amd64/amd64/netbsd32_machdep.c
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@ -1,4 +1,4 @@
/* $NetBSD: netbsd32_machdep.c,v 1.58 2009/08/16 17:12:47 pgoyette Exp $ */
/* $NetBSD: netbsd32_machdep.c,v 1.59 2009/09/25 13:56:32 mlelstv Exp $ */
/*
* Copyright (c) 2001 Wasabi Systems, Inc.
@ -36,7 +36,7 @@
*/
#include <sys/cdefs.h>
__KERNEL_RCSID(0, "$NetBSD: netbsd32_machdep.c,v 1.58 2009/08/16 17:12:47 pgoyette Exp $");
__KERNEL_RCSID(0, "$NetBSD: netbsd32_machdep.c,v 1.59 2009/09/25 13:56:32 mlelstv Exp $");
#ifdef _KERNEL_OPT
#include "opt_compat_netbsd.h"
@ -269,6 +269,9 @@ netbsd32_sendsig_sigcontext(const ksiginfo_t *ksi, const sigset_t *mask)
tf->tf_fs = GSEL(GUDATA32_SEL, SEL_UPL);
tf->tf_gs = GSEL(GUDATA32_SEL, SEL_UPL);
/* Ensure FP state is reset, if FP is used. */
l->l_md.md_flags &= ~MDP_USEDFPU;
tf->tf_rip = (uint64_t)catcher;
tf->tf_cs = GSEL(GUCODE32_SEL, SEL_UPL);
tf->tf_rflags &= ~PSL_CLEARSIG;
@ -360,6 +363,9 @@ netbsd32_sendsig_siginfo(const ksiginfo_t *ksi, const sigset_t *mask)
tf->tf_rsp = (uint64_t)fp;
tf->tf_ss = GSEL(GUDATA32_SEL, SEL_UPL);
/* Ensure FP state is reset, if FP is used. */
l->l_md.md_flags &= ~MDP_USEDFPU;
/* Remember that we're now on the signal stack. */
if (onstack)
l->l_sigstk.ss_flags |= SS_ONSTACK;