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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 2004-05-03 04:13:31 +00:00
parent deb118f7cc
commit 2319c1d288
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; FPSWA_BUNDLE bundle;
char *ip; char *ip;
/* Always fatal in kernel. Should never happen. */ if (fpswa_interface == NULL) {
if (!user) if (!user)
trap_panic(vector, tf); trap_panic(vector, tf);
if (fpswa_interface == NULL) {
sig = SIGFPE; sig = SIGFPE;
ucode = 0; ucode = 0;
break; break;
@ -682,12 +681,15 @@ trap(int vector, struct trapframe *tf)
if (vector == IA64_VEC_FLOATING_POINT_TRAP && if (vector == IA64_VEC_FLOATING_POINT_TRAP &&
(tf->tf_special.psr & IA64_PSR_RI) == 0) (tf->tf_special.psr & IA64_PSR_RI) == 0)
ip -= 16; ip -= 16;
if (user) {
error = copyin(ip, &bundle, 16); error = copyin(ip, &bundle, 16);
if (error) { if (error) {
sig = SIGBUS; /* EFAULT, basically */ sig = SIGBUS; /* EFAULT, basically */
ucode = 0; /* exception summary */ ucode = 0; /* exception summary */
break; break;
} }
} else
bcopy(ip, &bundle, 16);
/* f6-f15 are saved in exception_save */ /* f6-f15 are saved in exception_save */
fp_state.bitmask_low64 = 0xffc0; /* bits 6 - 15 */ 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", printf("FATAL: FPSWA err1 %lx, err2 %lx, err3 %lx\n",
fpswa_ret.err1, fpswa_ret.err2, fpswa_ret.err3); fpswa_ret.err1, fpswa_ret.err2, fpswa_ret.err3);
panic("fpswa fatal error on fp fault"); panic("fpswa fatal error on fp fault");
} else { } else if (user) {
sig = SIGFPE; sig = SIGFPE;
ucode = 0; /* XXX exception summary */ ucode = 0; /* XXX exception summary */
break; break;
} } else
goto out;
} }
case IA64_VEC_IA32_EXCEPTION: case IA64_VEC_IA32_EXCEPTION: