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| author | Russell King <rmk@dyn-67.arm.linux.org.uk> | 2006-04-25 20:41:27 +0100 |
|---|---|---|
| committer | Russell King <rmk+kernel@arm.linux.org.uk> | 2006-04-25 20:41:27 +0100 |
| commit | 928bd1b4709045355fad8bf858904884c0a1e87f (patch) | |
| tree | 1875af1016e3057fd25fa7441877f8a0b97cffbe | |
| parent | c7fd84424f919740880d989cb0459c332da96013 (diff) | |
| download | op-kernel-dev-928bd1b4709045355fad8bf858904884c0a1e87f.zip op-kernel-dev-928bd1b4709045355fad8bf858904884c0a1e87f.tar.gz | |
[ARM] vfp: fix leak of VFP_NAN_FLAG into FPSCR
The VFP code can leak VFP_NAN_FLAG into the FPSCR. It doesn't correspond
to any real FPSCR bit (and overlaps one of the exception flags).
Bug report from Daniel Jacobowitz
Signed-off-by: Russell King <rmk+kernel@arm.linux.org.uk>
| -rw-r--r-- | arch/arm/vfp/vfpdouble.c | 2 | ||||
| -rw-r--r-- | arch/arm/vfp/vfpmodule.c | 2 | ||||
| -rw-r--r-- | arch/arm/vfp/vfpsingle.c | 2 |
3 files changed, 3 insertions, 3 deletions
diff --git a/arch/arm/vfp/vfpdouble.c b/arch/arm/vfp/vfpdouble.c index febd115..009038c 100644 --- a/arch/arm/vfp/vfpdouble.c +++ b/arch/arm/vfp/vfpdouble.c @@ -197,7 +197,7 @@ u32 vfp_double_normaliseround(int dd, struct vfp_double *vd, u32 fpscr, u32 exce dd, d, exceptions); vfp_put_double(dd, d); } - return exceptions & ~VFP_NAN_FLAG; + return exceptions; } /* diff --git a/arch/arm/vfp/vfpmodule.c b/arch/arm/vfp/vfpmodule.c index 22f3da4..37ff814 100644 --- a/arch/arm/vfp/vfpmodule.c +++ b/arch/arm/vfp/vfpmodule.c @@ -180,7 +180,7 @@ static u32 vfp_emulate_instruction(u32 inst, u32 fpscr, struct pt_regs *regs) * emulate it. */ } - return exceptions; + return exceptions & ~VFP_NAN_FLAG; } /* diff --git a/arch/arm/vfp/vfpsingle.c b/arch/arm/vfp/vfpsingle.c index 4ac27f1..dae2c2f 100644 --- a/arch/arm/vfp/vfpsingle.c +++ b/arch/arm/vfp/vfpsingle.c @@ -203,7 +203,7 @@ u32 vfp_single_normaliseround(int sd, struct vfp_single *vs, u32 fpscr, u32 exce vfp_put_float(sd, d); } - return exceptions & ~VFP_NAN_FLAG; + return exceptions; } /* |
