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Call trap() for FP faults (T_FPEMULI*)

This commit is contained in:
gwr 1995-02-24 05:03:47 +00:00
parent 9e1cc93d67
commit 776a63c347
2 changed files with 71 additions and 51 deletions
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86
sys/arch/sun3/sun3/trap.c
View File

@ -1,4 +1,4 @@
/* $NetBSD: trap.c,v 1.39 1995/01/24 06:03:11 gwr Exp $ */
/* $NetBSD: trap.c,v 1.40 1995/02/24 05:03:47 gwr Exp $ */
/*
* Copyright (c) 1994 Gordon W. Ross
@ -81,6 +81,7 @@ extern int nsunos_sysent;
extern struct sysent sysent[];
extern int nsysent;
extern int fubail(), subail();
extern int *nofault;
/* XXX - put these in some header file? */
extern vm_offset_t virtual_avail;
@ -263,20 +264,29 @@ trap(type, code, v, frame)
sig = SIGBUS;
break;
case T_ILLINST|T_USER: /* illegal instruction fault */
case T_PRIVINST|T_USER: /* privileged instruction fault */
ucode = frame.f_format; /* XXX was ILL_PRIVIN_FAULT */
sig = SIGILL;
#ifdef FPCOPROC
case T_COPERR: /* kernel coprocessor violation */
#endif /* FPCOPROC */
case T_FMTERR|T_USER: /* do all RTE errors come in as T_USER? */
case T_FMTERR: /* ...just in case... */
/*
* The user has most likely trashed the RTE or FP state info
* in the stack frame of a signal handler.
*/
printf("pid %d: kernel %s exception\n", p->p_pid,
type==T_COPERR ? "coprocessor" : "format");
type |= T_USER;
p->p_sigacts->ps_sigact[SIGILL] = SIG_DFL;
/* temporary use of sig as mask */
sig = sigmask(SIGILL);
p->p_sigignore &= ~sig;
p->p_sigcatch &= ~sig;
p->p_sigmask &= ~sig;
sig = SIGILL; /* back to normal */
ucode = frame.f_format;
break;
case T_ZERODIV|T_USER: /* Divide by zero */
case T_CHKINST|T_USER: /* CHK instruction trap */
case T_TRAPVINST|T_USER: /* TRAPV instruction trap */
ucode = frame.f_format; /* XXX was FPE_INTOVF_TRAP */
sig = SIGFPE;
break;
#ifdef FPCOPROC
#ifdef FPCOPROC
case T_COPERR|T_USER: /* user coprocessor violation */
/* What is a proper response here? */
ucode = 0;
@ -296,27 +306,37 @@ trap(type, code, v, frame)
ucode = code;
sig = SIGFPE;
break;
#endif /* FPCOPROC */
case T_COPERR: /* kernel coprocessor violation */
/*FALLTHROUGH*/
#endif
case T_FMTERR|T_USER: /* do all RTE errors come in as T_USER? */
case T_FMTERR: /* ...just in case... */
/*
* The user has most likely trashed the RTE or FP state info
* in the stack frame of a signal handler.
*/
printf("pid %d: kernel %s exception\n", p->p_pid,
type==T_COPERR ? "coprocessor" : "format");
type |= T_USER;
p->p_sigacts->ps_sigact[SIGILL] = SIG_DFL;
/* temporary use of sig as mask */
sig = sigmask(SIGILL);
p->p_sigignore &= ~sig;
p->p_sigcatch &= ~sig;
p->p_sigmask &= ~sig;
sig = SIGILL; /* back to normal */
ucode = frame.f_format; /* XXX was ILL_RESAD_FAULT */
case T_FPEMULI: /* FPU faults in supervisor mode */
case T_FPEMULD:
if (nofault) /* Doing FPU probe? */
longjmp(nofault);
goto dopanic;
case T_FPEMULI|T_USER: /* unimplemented FP instuction */
case T_FPEMULD|T_USER: /* unimplemented FP data type */
/* XXX - Need to attach FPU emulator here. */
/* XXX need to FSAVE */
printf("pid %d(%s): unimplemented FP %s at %x (EA %x)\n",
p->p_pid, p->p_comm,
frame.f_format == 2 ? "instruction" : "data type",
frame.f_pc, frame.f_fmt2.f_iaddr);
/* XXX need to FRESTORE */
sig = SIGFPE;
break;
case T_ILLINST|T_USER: /* illegal instruction fault */
case T_PRIVINST|T_USER: /* privileged instruction fault */
ucode = frame.f_format;
sig = SIGILL;
break;
case T_ZERODIV|T_USER: /* Divide by zero */
case T_CHKINST|T_USER: /* CHK instruction trap */
case T_TRAPVINST|T_USER: /* TRAPV instruction trap */
ucode = frame.f_format;
sig = SIGFPE;
break;
/*

36
sys/arch/sun3/sun3/trap.s
View File

@ -1,4 +1,4 @@
/* $NetBSD: trap.s,v 1.11 1995/02/11 21:08:50 gwr Exp $ */
/* $NetBSD: trap.s,v 1.12 1995/02/24 05:03:49 gwr Exp $ */
/*
* Copyright (c) 1994 Gordon W. Ross
@ -44,20 +44,17 @@
* locore.s,v 1.2 1993/05/22 07:57:30 cgd Exp
*/
.text
.globl _buserr, _addrerr, _illinst, _zerodiv, _chkinst
.globl _trapvinst, _privinst, _trace, _badtrap, _fmterr
.globl _trap0, _trap1, _trap2, _trap12, _trap15
.globl _coperr, _fpfline, _fpunsupp
/*
* Trap/interrupt vector routines
*/
/* the buserr/addrerr won't work on a sun3. in particular more interpretation
* of the memory error register is necessary
*/
.text
.globl _buserr, _addrerr, _illinst, _zerodiv, _chkinst, _trapvinst
.globl _privinst, _trace, _fpfline, _badtrap, _coperr, _fmterr, _trap0,
.globl _trap1, _trap2, _trap12, _trap15
.globl _fpunsupp
.globl _trap, _nofault, _longjmp
_buserr:
tstl _nofault | device probe?
@ -161,17 +158,20 @@ Lstkadj:
movl sp@,sp | and our SP
jra rei | all done
/* unchanged from hp300 */
/*
* FP exceptions.
*/
_fpfline:
jra _illinst
clrl sp@- | stack adjust count
moveml #0xFFFF,sp@- | save registers
moveq #T_FPEMULI,d0 | denote as FP emulation trap
jra fault | do it
_fpunsupp:
jra _illinst
clrl sp@- | stack adjust count
moveml #0xFFFF,sp@- | save registers
moveq #T_FPEMULD,d0 | denote as FP emulation trap
jra fault | do it
/*
* Handles all other FP coprocessor exceptions.
@ -179,7 +179,7 @@ _fpunsupp:
* and may cause signal delivery, we need to test for stack adjustment
* after the trap call.
*/
.globl _fpfault
.globl _fpfault
_fpfault:
#ifdef FPCOPROC
clrl sp@- | stack adjust count
@ -302,7 +302,7 @@ _trap0:
movl a0,usp | user SP
moveml sp@+,#0x7FFF | restore most registers
addql #8,sp | pop SP and stack adjust
jra rei | all done
rte
/*
* Routines for traps 1 and 2. The meaning of the two traps depends