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Print some more info on unresolved user traps, mostly for DIAGNOSTIC.

This commit is contained in:
mjacob 1997-05-15 18:33:47 +00:00
parent e005d20961
commit 9854f9917e
1 changed files with 90 additions and 56 deletions
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146
sys/arch/alpha/alpha/trap.c
View File

@ -1,4 +1,4 @@
/* $NetBSD: trap.c,v 1.22 1997/04/10 01:03:07 cgd Exp $ */
/* $NetBSD: trap.c,v 1.23 1997/05/15 18:33:47 mjacob Exp $ */
/*
* Copyright (c) 1994, 1995, 1996 Carnegie-Mellon University.
@ -30,7 +30,7 @@
#include <machine/options.h> /* Config options headers */
#include <sys/cdefs.h> /* RCS ID & Copyright macro defns */
__KERNEL_RCSID(0, "$NetBSD: trap.c,v 1.22 1997/04/10 01:03:07 cgd Exp $");
__KERNEL_RCSID(0, "$NetBSD: trap.c,v 1.23 1997/05/15 18:33:47 mjacob Exp $");
#include <sys/param.h>
#include <sys/systm.h>
@ -65,6 +65,8 @@ unsigned long Gfloat_reg_cvt __P((unsigned long));
int unaligned_fixup __P((unsigned long, unsigned long,
unsigned long, struct proc *));
static void printtrap __P((const unsigned long, const unsigned long,
const unsigned long, const unsigned long, struct trapframe *, int, int));
/*
* Define the code needed before returning to user mode, for
* trap and syscall.
@ -111,6 +113,57 @@ userret(p, pc, oticks)
curpriority = p->p_priority;
}
static void
printtrap(a0, a1, a2, entry, framep, isfatal, user)
const unsigned long a0, a1, a2, entry;
struct trapframe *framep;
int isfatal, user;
{
char ubuf[64];
const char *entryname;
switch (entry) {
case ALPHA_KENTRY_INT:
entryname = "interrupt";
break;
case ALPHA_KENTRY_ARITH:
entryname = "arithmetic trap";
break;
case ALPHA_KENTRY_MM:
entryname = "memory management fault";
break;
case ALPHA_KENTRY_IF:
entryname = "instruction fault";
break;
case ALPHA_KENTRY_UNA:
entryname = "unaligned access fault";
break;
case ALPHA_KENTRY_SYS:
entryname = "system call";
break;
default:
sprintf(ubuf, "type %lx", entry);
entryname = (const char *) ubuf;
break;
}
printf("\n");
printf("%s %s trap:\n", isfatal? "fatal" : "handled",
user ? "user" : "kernel");
printf("\n");
printf(" trap entry = 0x%lx (%s)\n", entry, entryname);
printf(" a0 = 0x%lx\n", a0);
printf(" a1 = 0x%lx\n", a1);
printf(" a2 = 0x%lx\n", a2);
printf(" pc = 0x%lx\n", framep->tf_regs[FRAME_PC]);
printf(" ra = 0x%lx\n", framep->tf_regs[FRAME_RA]);
printf(" curproc = %p\n", curproc);
if (curproc != NULL)
printf(" pid = %d, comm = %s\n", curproc->p_pid,
curproc->p_comm);
printf("\n");
}
/*
* Trap is called from locore to handle most types of processor traps.
* System calls are broken out for efficiency and ASTs are broken out
@ -136,6 +189,14 @@ trap(a0, a1, a2, entry, framep)
if (user) {
sticks = p->p_sticks;
p->p_md.md_tf = framep;
#if 0
/* This is to catch some wierd stuff on the UDB (mj) */
if (framep->tf_regs[FRAME_PC] > 0 &&
framep->tf_regs[FRAME_PC] < 0x120000000) {
printf("PC Out of Whack\n");
printtrap(a0, a1, a2, entry, framep, 1, user);
}
#endif
} else {
sticks = 0; /* XXX bogus -Wuninitialized warning */
}
@ -175,7 +236,7 @@ trap(a0, a1, a2, entry, framep)
* user has requested that.
*/
if (user) {
sigfpe: i = SIGFPE;
i = SIGFPE;
ucode = a0; /* exception summary */
break;
}
@ -190,11 +251,15 @@ sigfpe: i = SIGFPE;
*/
if (!user)
goto dopanic;
i = 0;
switch (a0) {
case ALPHA_IF_CODE_GENTRAP:
if (framep->tf_regs[FRAME_A0] == -2) /* weird! */
goto sigfpe;
if (framep->tf_regs[FRAME_A0] == -2) { /* weird! */
i = SIGFPE;
ucode = a0; /* exception summary */
break;
}
/* FALLTHROUTH */
case ALPHA_IF_CODE_BPT:
case ALPHA_IF_CODE_BUGCHK:
ucode = a0; /* trap type */
@ -204,13 +269,17 @@ sigfpe: i = SIGFPE;
case ALPHA_IF_CODE_OPDEC:
ucode = a0; /* trap type */
#ifdef NEW_PMAP
{
int instr;
printf("REAL SIGILL: PC = 0x%lx, RA = 0x%lx\n", framep->tf_regs[FRAME_PC], framep->tf_regs[FRAME_RA]);
printf("INSTRUCTION (%d) = 0x%lx\n", copyin((void*)framep->tf_regs[FRAME_PC] - 4, &instr, 4), instr);
regdump(framep);
panic("foo");
}
{
int instr;
printf("REAL SIGILL: PC = 0x%lx, RA = 0x%lx\n",
framep->tf_regs[FRAME_PC],
framep->tf_regs[FRAME_RA]);
printf("INSTRUCTION (%d) = 0x%lx\n",
copyin((void*)framep->tf_regs[FRAME_PC] - 4,
&instr, 4), instr);
regdump(framep);
panic("foo");
}
#endif
i = SIGILL;
break;
@ -272,7 +341,7 @@ panic("foo");
case ALPHA_MMCSR_ACCESS:
{
register vm_offset_t va;
register struct vmspace *vm;
register struct vmspace *vm = NULL;
register vm_map_t map;
vm_prot_t ftype;
int rv;
@ -385,6 +454,9 @@ panic("foo");
}
ucode = a0;
i = SIGSEGV;
#ifdef DIAGNOSTIC
printtrap(a0, a1, a2, entry, framep, 1, user);
#endif
break;
}
@ -398,6 +470,9 @@ panic("foo");
goto dopanic;
}
#ifdef DEBUG
printtrap(a0, a1, a2, entry, framep, 1, user);
#endif
trapsignal(p, i, ucode);
out:
if (user)
@ -405,48 +480,7 @@ out:
return;
dopanic:
{
const char *entryname;
switch (entry) {
case ALPHA_KENTRY_INT:
entryname = "interrupt";
break;
case ALPHA_KENTRY_ARITH:
entryname = "arithmetic trap";
break;
case ALPHA_KENTRY_MM:
entryname = "memory management fault";
break;
case ALPHA_KENTRY_IF:
entryname = "instruction fault";
break;
case ALPHA_KENTRY_UNA:
entryname = "unaligned access fault";
break;
case ALPHA_KENTRY_SYS:
entryname = "system call";
break;
default:
entryname = "???";
break;
}
printf("\n");
printf("fatal %s trap:\n", user ? "user" : "kernel");
printf("\n");
printf(" trap entry = 0x%lx (%s)\n", entry, entryname);
printf(" a0 = 0x%lx\n", a0);
printf(" a1 = 0x%lx\n", a1);
printf(" a2 = 0x%lx\n", a2);
printf(" pc = 0x%lx\n", framep->tf_regs[FRAME_PC]);
printf(" ra = 0x%lx\n", framep->tf_regs[FRAME_RA]);
printf(" curproc = %p\n", curproc);
if (curproc != NULL)
printf(" pid = %d, comm = %s\n", curproc->p_pid,
curproc->p_comm);
printf("\n");
}
printtrap(a0, a1, a2, entry, framep, 1, user);
/* XXX dump registers */
/* XXX kernel debugger */