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Correct save FP state for signals.

This commit is contained in:
fvdl 2003-05-04 12:00:14 +00:00
parent 6c34824459
commit 7a214454f6
1 changed files with 5 additions and 3 deletions
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8
sys/arch/amd64/amd64/machdep.c
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@ -1,4 +1,4 @@
/* $NetBSD: machdep.c,v 1.1 2003/04/26 18:39:29 fvdl Exp $ */
/* $NetBSD: machdep.c,v 1.2 2003/05/04 12:00:14 fvdl Exp $ */
/*-
* Copyright (c) 1996, 1997, 1998, 2000 The NetBSD Foundation, Inc.
@ -520,6 +520,7 @@ sendsig(sig, mask, code)
fp = (struct sigframe *)sp - 1;
if (l->l_md.md_flags & MDP_USEDFPU) {
fpusave_lwp(l, 1);
frame.sf_sc.sc_fpstate =
(struct fxsave64 *)&fp->sf_sc.sc_mcontext.__fpregs;
memcpy(&frame.sf_sc.sc_mcontext.__fpregs,
@ -653,7 +654,8 @@ sys___sigreturn14(l, v, retval)
* program jumps out of a signal handler.
*/
scp = SCARG(uap, sigcntxp);
if (copyin((caddr_t)scp, &context, sizeof(*scp)) != 0)
if (copyin((caddr_t)scp, &context,
sizeof(struct sigcontext) - sizeof(struct fxsave64)) != 0)
return EFAULT;
/* Restore register context. */
@ -674,7 +676,7 @@ sys___sigreturn14(l, v, retval)
/* Restore (possibly fixed up) FP state and force it to be reloaded */
if (l->l_md.md_flags & MDP_USEDFPU) {
fpusave_lwp(l, 0);
if (copyin(context.sc_fpstate,
if (context.sc_fpstate != NULL && copyin(context.sc_fpstate,
&l->l_addr->u_pcb.pcb_savefpu.fp_fxsave,
sizeof (struct fxsave64)) != 0)
return EFAULT;