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* Add new sysctl "machdep.ieee_disable". This can be used to disable the

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in kernel ieee trap handler. Then a usermode version of the code can be
  used for debugging. Thank's to Ian Dall for this suggestion.
This commit is contained in:
matthias 1997-04-01 16:33:04 +00:00
parent d89b0839dc
commit d0c4177d0c
1 changed files with 17 additions and 15 deletions
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32
sys/arch/pc532/pc532/trap.c
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@ -1,4 +1,4 @@
/* $NetBSD: trap.c,v 1.23 1997/03/20 12:00:59 matthias Exp $ */
/* $NetBSD: trap.c,v 1.24 1997/04/01 16:33:04 matthias Exp $ */
/*-
* Copyright (c) 1996 Matthias Pfaller. All rights reserved.
@ -302,22 +302,24 @@ trap(frame)
case T_SLAVE | T_USER: {
int fsr, sig = SIGFPE;
pcb = &p->p_addr->u_pcb;
save_fpu_context(pcb);
switch(ieee_handle_exception(p)) {
case FPC_TT_NONE:
restore_fpu_context(pcb);
if (frame.tf_regs.r_psr & PSL_T) {
type = T_TRC | T_USER;
goto trace;
if (ieee_handler_disable == 0) {
save_fpu_context(pcb);
switch(ieee_handle_exception(p)) {
case FPC_TT_NONE:
restore_fpu_context(pcb);
if (frame.tf_regs.r_psr & PSL_T) {
type = T_TRC | T_USER;
goto trace;
}
return;
case FPC_TT_ILL:
sig = SIGILL;
break;
default:
break;
}
return;
case FPC_TT_ILL:
sig = SIGILL;
break;
default:
break;
restore_fpu_context(pcb);
}
restore_fpu_context(pcb);
sfsr(fsr);
trapsignal(p, sig, 0x80000000 | fsr);
goto out;