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Parse the various argument registers in the printtrap() function so that

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one doesn't have to go grab a reference manual to decode them by hand every
time the alpha kernel falls over.

Reviewed by:	drew, -alpha
This commit is contained in:
John Baldwin 2001-04-11 16:20:11 +00:00
parent 5e4c98b1a6
commit 45fdf62519
Notes: svn2git 2020-12-20 02:59:44 +00:00 
svn path=/head/; revision=75418
1 changed files with 109 additions and 7 deletions
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116
sys/alpha/alpha/trap.c
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@ -91,6 +91,47 @@ static void printtrap __P((const unsigned long, const unsigned long,
extern char *syscallnames[];
#endif
static const char *arith_exceptions[] = {
"software completion",
"invalid operation",
"division by zero",
"overflow",
"underflow",
"inexact result",
"integer overflow",
};
static const char *instruction_faults[] = {
"bpt",
"bugchk",
"gentrap",
"FEN",
"opDec"
};
static const char *interrupt_types[] = {
"interprocessor",
"clock",
"correctable error",
"machine check",
"I/O device",
"performance counter"
};
static const char *mmfault_types[] = {
"translation not valid",
"access violation",
"fault on read",
"fault on execute",
"fault on write"
};
static const char *mmfault_causes[] = {
"instruction fetch",
"load instructon",
"store instruction"
};
/*
* Define the code needed before returning to user mode, for
* trap and syscall.
@ -150,6 +191,7 @@ printtrap(a0, a1, a2, entry, framep, isfatal, user)
{
char ubuf[64];
const char *entryname;
unsigned long i;
switch (entry) {
case ALPHA_KENTRY_INT:
@ -180,13 +222,73 @@ printtrap(a0, a1, a2, entry, framep, isfatal, user)
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);
printf(" trap entry = 0x%lx (%s)\n", entry, entryname);
#ifdef SMP
printf(" cpuid = %d\n", PCPU_GET(cpuid));
#endif
switch (entry) {
case ALPHA_KENTRY_INT:
printf(" interrupt type = ");
if (a0 < 5) {
printf("%s\n", interrupt_types[a0]);
if (a0 > 1) {
printf(" vector = 0x%lx\n", a1);
if (a0 < 3)
printf(" logout area = 0x%lx\n",
a2);
}
} else
printf("0x%lx (unknown)\n", a0);
break;
case ALPHA_KENTRY_ARITH:
printf(" exception type = ");
for (i = 0; i < 7; i++)
if (a0 & (1 << i)) {
printf("%s", arith_exceptions[i]);
if (a0 & (~0 - (1 << i)))
printf(", ");
}
printf("\n");
printf(" register mask = 0x%lx", a1);
break;
case ALPHA_KENTRY_MM:
printf(" faulting va = 0x%lx\n", a0);
printf(" type = ");
if (a1 < 5)
printf("%s\n", mmfault_types[a1]);
else
printf("0x%lx (unknown)\n", a1);
printf(" cause = ");
i = a2 + 1;
if (i < 3)
printf("%s\n", mmfault_causes[i]);
else
printf("0x%lx (unknown)\n", a2);
break;
case ALPHA_KENTRY_IF:
printf(" fault type = ");
if (a0 < 5)
printf("%s\n", instruction_faults[a0]);
else
printf("0x%lx (unknown)\n", a0);
break;
case ALPHA_KENTRY_UNA:
printf(" faulting va = 0x%lx\n", a0);
printf(" opcode = 0x%lx\n", a1);
printf(" register = 0x%lx\n", a2);
break;
default:
printf(" a0 = 0x%lx\n", a0);
printf(" a1 = 0x%lx\n", a1);
printf(" a2 = 0x%lx\n", a2);
break;
}
printf(" pc = 0x%lx\n", framep->tf_regs[FRAME_PC]);
printf(" ra = 0x%lx\n", framep->tf_regs[FRAME_RA]);
printf(" sp = 0x%lx\n", framep->tf_regs[FRAME_SP]);
if (curproc != NULL && (curproc->p_flag & P_KTHREAD) == 0)
printf(" usp = 0x%lx\n", alpha_pal_rdusp());
printf(" curproc = %p\n", curproc);
if (curproc != NULL)
printf(" pid = %d, comm = %s\n", curproc->p_pid,
curproc->p_comm);