diff options
| author | Dave Martin <Dave.Martin@arm.com> | 2018-03-01 17:44:06 +0000 |
|---|---|---|
| committer | Eric W. Biederman <ebiederm@xmission.com> | 2018-03-15 16:04:25 -0500 |
| commit | 266da65e9156d93e1126e185259a4aae68188d0e (patch) | |
| tree | 0591d9cd021e9693a5bbf56e914ea140ea2be091 | |
| parent | f6a015498dcaee72f80283cb7873d88deb07129c (diff) | |
signal: Add FPE_FLTUNK si_code for undiagnosable fp exceptions
Some architectures cannot always report accurately what kind of
floating-point exception triggered a floating-point exception trap.
This can occur with fp exceptions occurring on lanes in a vector
instruction on arm64 for example.
Rather than have every architecture come up with its own way of
describing such a condition, this patch adds a common FPE_FLTUNK
si_code value to report that an fp exception caused a trap but we
cannot be certain which kind of fp exception it was.
Signed-off-by: Dave Martin <Dave.Martin@arm.com>
Signed-off-by: Eric W. Biederman <ebiederm@xmission.com>
| -rw-r--r-- | arch/x86/kernel/signal_compat.c | 2 | ||||
| -rw-r--r-- | include/uapi/asm-generic/siginfo.h | 3 |
2 files changed, 3 insertions, 2 deletions
diff --git a/arch/x86/kernel/signal_compat.c b/arch/x86/kernel/signal_compat.c index 0d930d8987cc..d2884e951bb5 100644 --- a/arch/x86/kernel/signal_compat.c +++ b/arch/x86/kernel/signal_compat.c @@ -26,7 +26,7 @@ static inline void signal_compat_build_tests(void) * new fields are handled in copy_siginfo_to_user32()! */ BUILD_BUG_ON(NSIGILL != 11); - BUILD_BUG_ON(NSIGFPE != 13); + BUILD_BUG_ON(NSIGFPE != 14); BUILD_BUG_ON(NSIGSEGV != 4); BUILD_BUG_ON(NSIGBUS != 5); BUILD_BUG_ON(NSIGTRAP != 4); diff --git a/include/uapi/asm-generic/siginfo.h b/include/uapi/asm-generic/siginfo.h index 99c902e460c2..4b3520bf67ba 100644 --- a/include/uapi/asm-generic/siginfo.h +++ b/include/uapi/asm-generic/siginfo.h @@ -229,7 +229,8 @@ typedef struct siginfo { # define __FPE_INVASC 12 /* invalid ASCII digit */ # define __FPE_INVDEC 13 /* invalid decimal digit */ #endif -#define NSIGFPE 13 +#define FPE_FLTUNK 14 /* undiagnosed floating-point exception */ +#define NSIGFPE 14 /* * SIGSEGV si_codes |