HP-UX Reference (11i v2 04/09) - 5 Miscellaneous Topics (vol 9)

signal(5) signal(5)

For SIGFPE, code has the following values:

12 Overﬂow trap;

13 Conditional trap;

14 Assist exception trap;

22 Assist emulation trap.

Refer to the Series 800 processor documentation provided with your system for more detailed information

about the meaning of these errors.

The Instruction Address Offset Queue (program counter) is not advanced when a trap occurs on Series

800 systems. If a signal generated by a hardware trap is masked or has its signal action set to

SIG_IGN,

the program loops inﬁnitely since the instruction causing the trap is re-executed, causing the trap again.

If the signal is received by a signal-catching function in the user program, the instruction that caused the

trap is re-executed upon return from the signal-catching function unless program ﬂow is altered by the

signal-catching function. For example, the

longjmp() routine (see setjmp (3C)) can be called. Using

longjmp() ensures software portability across different hardware architectures.

AUTHOR

signal was developed by HP, AT&T, and the University of California, Berkeley.