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authorGeorge G. Davis <davis_g@mvista.com>2006-05-06 01:32:23 +0400
committerRussell King <rmk+kernel@arm.linux.org.uk>2006-05-06 01:32:23 +0400
commitb7d7ef87e15dea105be59ec8f14e2f92182dd421 (patch)
tree2dc6e24528e63900f42bdf8a73e6bfcce1249692 /arch/arm/vfp
parent2eb9d3157107497fdccb51e1570fea677f6e3c82 (diff)
downloadlinux-b7d7ef87e15dea105be59ec8f14e2f92182dd421.tar.xz
[ARM] 3499/1: Fix VFP FPSCR corruption for double exception case
Patch from George G. Davis The ARM VFP FPSCR register is corrupted when a condition flags modifying VFP instruction is followed by a non-condition flags modifying VFP instruction and both instructions raise exceptions. The fix is to read the current FPSCR in between emulation of these two instructions and use the current FPSCR value when handling the second exception. Signed-off-by: George G. Davis <gdavis@mvista.com> Signed-off-by: Russell King <rmk+kernel@arm.linux.org.uk>
Diffstat (limited to 'arch/arm/vfp')
-rw-r--r--arch/arm/vfp/vfpmodule.c2
1 files changed, 1 insertions, 1 deletions
diff --git a/arch/arm/vfp/vfpmodule.c b/arch/arm/vfp/vfpmodule.c
index 37ff8145b5b5..03486be04193 100644
--- a/arch/arm/vfp/vfpmodule.c
+++ b/arch/arm/vfp/vfpmodule.c
@@ -245,7 +245,7 @@ void VFP9_bounce(u32 trigger, u32 fpexc, struct pt_regs *regs)
*/
barrier();
trigger = fmrx(FPINST2);
- fpscr = fmrx(FPSCR);
+ orig_fpscr = fpscr = fmrx(FPSCR);
emulate:
exceptions = vfp_emulate_instruction(trigger, fpscr, regs);