[20/23] parisc: clear floating point exception flag on SIGFPE signal
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From: Greg KH on 1 Jul 2010 14:20 2.6.27-stable review patch. If anyone has any objections, please let us know. ------------------ From: Helge Deller <deller(a)gmx.de> commit 550f0d922286556c7ea43974bb7921effb5a5278 upstream. Clear the floating point exception flag before returning to user space. This is needed, else the libc trampoline handler may hit the same SIGFPE again while building up a trampoline to a signal handler. Fixes debian bug #559406. Signed-off-by: Helge Deller <deller(a)gmx.de> Signed-off-by: Kyle McMartin <kyle(a)mcmartin.ca> Signed-off-by: Greg Kroah-Hartman <gregkh(a)suse.de> --- arch/parisc/math-emu/decode_exc.c | 1 + 1 file changed, 1 insertion(+) --- a/arch/parisc/math-emu/decode_exc.c +++ b/arch/parisc/math-emu/decode_exc.c @@ -342,6 +342,7 @@ decode_fpu(unsigned int Fpu_register[], return SIGNALCODE(SIGFPE, FPE_FLTINV); case DIVISIONBYZEROEXCEPTION: update_trap_counts(Fpu_register, aflags, bflags, trap_counts); + Clear_excp_register(exception_index); return SIGNALCODE(SIGFPE, FPE_FLTDIV); case INEXACTEXCEPTION: update_trap_counts(Fpu_register, aflags, bflags, trap_counts); -- To unsubscribe from this list: send the line "unsubscribe linux-kernel" in the body of a message to majordomo(a)vger.kernel.org More majordomo info at http://vger.kernel.org/majordomo-info.html Please read the FAQ at http://www.tux.org/lkml/ |