Advanced Programming in the UNIX® Environment

ptg10805159

Section 10.14 sigactionFunction 353

Theuc_stackfield describes the stack used by the current context. It contains at least

the following members:

void *ss_sp; /* stack base or pointer */

size_t ss_size; /* stack size */

int ss_flags; /* flags */

When an implementation supports the real-time signal extensions, signal handlers established

with theSA_SIGINFOflag will result in signals being queued reliably.Aseparate range of

reserved signal numbers is available for real-time application use. Applications can pass

information along with the signal by using thesigqueuefunction (Section 10.20).

Signal Code Reason

ILL_ILLOPC illegal opcode

ILL_ILLOPN illegal operand

ILL_ILLADR illegal addressing mode

ILL_ILLTRP illegal trap

ILL_PRVOPC privileged opcode

ILL_PRVREG privileged register

ILL_COPROC coprocessor error

ILL_BADSTK internal stack error

SIGILL

FPE_INTDIV integer divide by zero

FPE_INTOVF integer overflow

FPE_FLTDIV floating-point divide by zero

FPE_FLTOVF floating-point overflow

FPE_FLTUND floating-point underflow

FPE_FLTRES floating-point inexact result

FPE_FLTINV invalid floating-point operation

FPE_FLTSUB subscript out of range

SIGFPE

SEGV_MAPERR address not mapped to object

SIGSEGV SEGV_ACCERR invalid permissions for mapped object

BUS_ADRALN invalid address alignment

BUS_ADRERR nonexistent physical address

BUS_OBJERR object-specific hardwareerror

SIGBUS

TRAP_BRKPT process breakpoint trap

SIGTRAP TRAP_TRACE process trace trap

CLD_EXITED child has exited

CLD_KILLED child has terminated abnormally (no core)

CLD_DUMPED child has terminated abnormally with core

CLD_TRAPPED traced child has trapped

CLD_STOPPED child has stopped

CLD_CONTINUED stopped child has continued

SIGCHLD

SI_USER signal sent bykill

SI_QUEUE signal sent bysigqueue

SI_TIMER expiration of a timer set bytimer_settime

SI_ASYNCIO completion of asynchronous I/O request

SI_MESGQ arrival of a message on a message queue (real-time extension)

Any

Figure 10.17 siginfo_tcode values