[hppa] clear floating point exception flag on SIGFPE signal

(Closes: #559406)

svn path=/dists/sid/linux-2.6/; revision=15820

debian/changelog

@@ -1,3 +1,10 @@
+linux-2.6 (2.6.32-16) UNRELEASED; urgency=low
+
+  * [hppa] clear floating point exception flag on SIGFPE signal
+    (Closes: #559406)
+
+ -- dann frazier <dannf@debian.org>  Tue, 01 Jun 2010 09:23:57 -0600
+
 linux-2.6 (2.6.32-15) unstable; urgency=low
 
   [ Ben Hutchings ]

debian/patches/bugfix/parisc/clear-fp-exception-flag-on-SIGFPE.patch

@@ -0,0 +1,28 @@
+commit 550f0d922286556c7ea43974bb7921effb5a5278
+Author: Helge Deller <deller@gmx.de>
+Date:   Mon May 3 20:44:21 2010 +0000
+
+    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>
+
+diff --git a/arch/parisc/math-emu/decode_exc.c b/arch/parisc/math-emu/decode_exc.c
+index 3ca1c61..27a7492 100644
+--- 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[], unsigned int trap_counts[])
+ 		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);

debian/patches/series/16

@@ -0,0 +1 @@
++ bugfix/parisc/clear-fp-exception-flag-on-SIGFPE.patch