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parisc: clear floating point exception flag on SIGFPE signal 

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@gmx.de>
Signed-off-by: Kyle McMartin <kyle@mcmartin.ca>
This commit is contained in:
Helge Deller 2010-05-03 20:44:21 +00:00 committed by Kyle McMartin
parent d24944d924
commit 550f0d9222
1 changed files with 1 additions and 0 deletions
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arch/parisc/math-emu/decode_exc.c
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@ -342,6 +342,7 @@ decode_fpu(unsigned int Fpu_register[], unsigned int trap_counts[])
return SIGNALCODE(SIGFPE, FPE_FLTINV); return SIGNALCODE(SIGFPE, FPE_FLTINV);
case DIVISIONBYZEROEXCEPTION: case DIVISIONBYZEROEXCEPTION:
update_trap_counts(Fpu_register, aflags, bflags, trap_counts); update_trap_counts(Fpu_register, aflags, bflags, trap_counts);
Clear_excp_register(exception_index);
return SIGNALCODE(SIGFPE, FPE_FLTDIV); return SIGNALCODE(SIGFPE, FPE_FLTDIV);
case INEXACTEXCEPTION: case INEXACTEXCEPTION:
update_trap_counts(Fpu_register, aflags, bflags, trap_counts); update_trap_counts(Fpu_register, aflags, bflags, trap_counts);