Commit 266da65e authored by Dave Martin's avatar Dave Martin Committed by Eric W. Biederman

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: default avatarDave Martin <[email protected]>
Signed-off-by: default avatarEric W. Biederman <[email protected]>
parent f6a01549
...@@ -26,7 +26,7 @@ static inline void signal_compat_build_tests(void) ...@@ -26,7 +26,7 @@ static inline void signal_compat_build_tests(void)
* new fields are handled in copy_siginfo_to_user32()! * new fields are handled in copy_siginfo_to_user32()!
*/ */
BUILD_BUG_ON(NSIGILL != 11); BUILD_BUG_ON(NSIGILL != 11);
BUILD_BUG_ON(NSIGFPE != 13); BUILD_BUG_ON(NSIGFPE != 14);
BUILD_BUG_ON(NSIGSEGV != 4); BUILD_BUG_ON(NSIGSEGV != 4);
BUILD_BUG_ON(NSIGBUS != 5); BUILD_BUG_ON(NSIGBUS != 5);
BUILD_BUG_ON(NSIGTRAP != 4); BUILD_BUG_ON(NSIGTRAP != 4);
......
...@@ -229,7 +229,8 @@ typedef struct siginfo { ...@@ -229,7 +229,8 @@ typedef struct siginfo {
# define __FPE_INVASC 12 /* invalid ASCII digit */ # define __FPE_INVASC 12 /* invalid ASCII digit */
# define __FPE_INVDEC 13 /* invalid decimal digit */ # define __FPE_INVDEC 13 /* invalid decimal digit */
#endif #endif
#define NSIGFPE 13 #define FPE_FLTUNK 14 /* undiagnosed floating-point exception */
#define NSIGFPE 14
/* /*
* SIGSEGV si_codes * SIGSEGV si_codes
......
Markdown is supported
0% or
You are about to add 0 people to the discussion. Proceed with caution.
Finish editing this message first!
Please register or to comment