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Make sure the enable bit is not set when restoring the VFP context since 

that has special meaning to the VFP PCU code.
This commit is contained in:
matt 2012-12-08 06:46:49 +00:00
parent b72a1f38b6
commit cb733fbb03
1 changed files with 8 additions and 4 deletions
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12
sys/arch/arm/arm/process_machdep.c
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@ -1,4 +1,4 @@
/* $NetBSD: process_machdep.c,v 1.24 2012/12/05 19:05:46 matt Exp $ */ /* $NetBSD: process_machdep.c,v 1.25 2012/12/08 06:46:49 matt Exp $ */
/* /*
* Copyright (c) 1993 The Regents of the University of California. * Copyright (c) 1993 The Regents of the University of California.
@ -133,7 +133,7 @@
#include <sys/param.h> #include <sys/param.h>
__KERNEL_RCSID(0, "$NetBSD: process_machdep.c,v 1.24 2012/12/05 19:05:46 matt Exp $"); __KERNEL_RCSID(0, "$NetBSD: process_machdep.c,v 1.25 2012/12/08 06:46:49 matt Exp $");
#include <sys/proc.h> #include <sys/proc.h>
#include <sys/ptrace.h> #include <sys/ptrace.h>
@ -144,6 +144,7 @@ __KERNEL_RCSID(0, "$NetBSD: process_machdep.c,v 1.24 2012/12/05 19:05:46 matt Ex
#include <machine/reg.h> #include <machine/reg.h>
#include <arm/armreg.h> #include <arm/armreg.h>
#include <arm/vfpreg.h>
int int
process_read_regs(struct lwp *l, struct reg *regs) process_read_regs(struct lwp *l, struct reg *regs)
@ -175,13 +176,15 @@ process_read_fpregs(struct lwp *l, struct fpreg *regs)
{ {
#ifdef FPU_VFP #ifdef FPU_VFP
if (curcpu()->ci_vfp_id == 0) { if (curcpu()->ci_vfp_id == 0) {
return EINVAL; memset(regs, 0, sizeof(regs));
return 0;
} }
const struct pcb * const pcb = lwp_getpcb(l); const struct pcb * const pcb = lwp_getpcb(l);
vfp_savecontext(); vfp_savecontext();
regs->fpr_vfp = pcb->pcb_vfp; regs->fpr_vfp = pcb->pcb_vfp;
regs->fpr_vfp.vfp_fpexc &= ~VFP_FPEXC_EN;
#endif #endif
return(0); return 0;
} }
int int
@ -227,6 +230,7 @@ process_write_fpregs(struct lwp *l, const struct fpreg *regs)
vfp_discardcontext(); vfp_discardcontext();
l->l_md.md_flags |= MDLWP_VFPUSED; l->l_md.md_flags |= MDLWP_VFPUSED;
pcb->pcb_vfp = regs->fpr_vfp; pcb->pcb_vfp = regs->fpr_vfp;
pcb->pcb_vfp.vfp_fpexc &= ~VFP_FPEXC_EN;
#endif #endif
return(0); return(0);
} }