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Floating-point faults and exceptions can happen in the kernel too.

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Do not panic when it happens; handle them.

Run into by: das
This commit is contained in:
Marcel Moolenaar 2004-05-03 04:13:31 +00:00
parent 09a6afb586
commit e160e18ba6
Notes: svn2git 2020-12-20 02:59:44 +00:00 
svn path=/head/; revision=128857
1 changed files with 15 additions and 12 deletions
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11
sys/ia64/ia64/trap.c
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@ -668,11 +668,10 @@ trap(int vector, struct trapframe *tf)
FPSWA_BUNDLE bundle;
char *ip;
/* Always fatal in kernel. Should never happen. */
if (fpswa_interface == NULL) {
if (!user)
trap_panic(vector, tf);
if (fpswa_interface == NULL) {
sig = SIGFPE;
ucode = 0;
break;
@ -682,12 +681,15 @@ trap(int vector, struct trapframe *tf)
if (vector == IA64_VEC_FLOATING_POINT_TRAP &&
(tf->tf_special.psr & IA64_PSR_RI) == 0)
ip -= 16;
if (user) {
error = copyin(ip, &bundle, 16);
if (error) {
sig = SIGBUS; /* EFAULT, basically */
ucode = 0; /* exception summary */
break;
}
} else
bcopy(ip, &bundle, 16);
/* f6-f15 are saved in exception_save */
fp_state.bitmask_low64 = 0xffc0; /* bits 6 - 15 */
@ -739,11 +741,12 @@ trap(int vector, struct trapframe *tf)
printf("FATAL: FPSWA err1 %lx, err2 %lx, err3 %lx\n",
fpswa_ret.err1, fpswa_ret.err2, fpswa_ret.err3);
panic("fpswa fatal error on fp fault");
} else {
} else if (user) {
sig = SIGFPE;
ucode = 0; /* XXX exception summary */
break;
}
} else
goto out;
}
case IA64_VEC_IA32_EXCEPTION: