version 1.19, 2002/12/24 23:40:30
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version 1.29, 2006/01/05 01:37:33
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/* signal handling |
/* signal handling |
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Copyright (C) 1995,1996,1997,1998,2000 Free Software Foundation, Inc. |
Copyright (C) 1995,1996,1997,1998,2000,2003 Free Software Foundation, Inc. |
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This file is part of Gforth. |
This file is part of Gforth. |
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Line 31
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#include <sys/ioctl.h> |
#include <sys/ioctl.h> |
#endif |
#endif |
/* #include <asm/signal.h> */ |
/* #include <asm/signal.h> */ |
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#include <sys/types.h> |
#include <signal.h> |
#include <signal.h> |
#include "io.h" |
#include "io.h" |
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#ifndef HAVE_STACK_T |
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/* Darwin uses "struct sigaltstack" instead of "stack_t" */ |
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typedef struct sigaltstack stack_t; |
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#endif |
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#define DEFAULTCOLS 80 |
#define DEFAULTCOLS 80 |
#if defined(MSDOS) || defined (_WIN32) |
#if defined(MSDOS) || defined (_WIN32) |
Line 67 void install_signal_handler(int sig, voi
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Line 72 void install_signal_handler(int sig, voi
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} |
} |
#endif |
#endif |
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typedef void Sigfunc(int); |
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Sigfunc *bsd_signal(int signo, Sigfunc *func) |
Sigfunc *bsd_signal(int signo, Sigfunc *func) |
{ |
{ |
struct sigaction act, oact; |
struct sigaction act, oact; |
Line 104 signal_throw(int sig)
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Line 107 signal_throw(int sig)
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case SIGBUS: code=-23; break; |
case SIGBUS: code=-23; break; |
#endif |
#endif |
case SIGSEGV: code=-9; break; |
case SIGSEGV: code=-9; break; |
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#ifdef SIGPIPE |
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case SIGPIPE: code=-2049; break; |
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#endif |
default: code=-256-sig; break; |
default: code=-256-sig; break; |
} |
} |
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#ifdef __CYGWIN__ |
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/* the SA_NODEFER apparently does not work on Cygwin 1.3.18(0.69/3/2) */ |
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{ |
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sigset_t emptyset; |
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sigemptyset(&emptyset); |
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sigprocmask(SIG_SETMASK, &emptyset, NULL); |
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} |
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#endif |
longjmp(throw_jmp_buf,code); /* !! or use siglongjmp ? */ |
longjmp(throw_jmp_buf,code); /* !! or use siglongjmp ? */ |
} |
} |
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#ifdef SA_SIGINFO |
#ifdef SA_SIGINFO |
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static void |
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sigaction_throw(int sig, siginfo_t *info, void *_) |
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{ |
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signal_throw(sig); |
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} |
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static void fpe_handler(int sig, siginfo_t *info, void *_) |
static void fpe_handler(int sig, siginfo_t *info, void *_) |
/* handler for SIGFPE */ |
/* handler for SIGFPE */ |
{ |
{ |
Line 122 static void fpe_handler(int sig, siginfo
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Line 142 static void fpe_handler(int sig, siginfo
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#ifdef FPE_INTOVF |
#ifdef FPE_INTOVF |
case FPE_INTOVF: code=-11; break; /* integer overflow */ |
case FPE_INTOVF: code=-11; break; /* integer overflow */ |
#endif |
#endif |
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#ifdef FPE_FLTDIV |
case FPE_FLTDIV: code=-42; break; /* floating point divide by zero */ |
case FPE_FLTDIV: code=-42; break; /* floating point divide by zero */ |
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#endif |
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#ifdef FPE_FLTOVF |
case FPE_FLTOVF: code=-43; break; /* floating point overflow */ |
case FPE_FLTOVF: code=-43; break; /* floating point overflow */ |
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#endif |
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#ifdef FPE_FLTUND |
case FPE_FLTUND: code=-54; break; /* floating point underflow */ |
case FPE_FLTUND: code=-54; break; /* floating point underflow */ |
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#endif |
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#ifdef FPE_FLTRES |
case FPE_FLTRES: code=-41; break; /* floating point inexact result */ |
case FPE_FLTRES: code=-41; break; /* floating point inexact result */ |
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#endif |
#if 0 /* defined by Unix95, but unnecessary */ |
#if 0 /* defined by Unix95, but unnecessary */ |
case FPE_FLTINV: /* invalid floating point operation */ |
case FPE_FLTINV: /* invalid floating point operation */ |
case FPE_FLTSUB: /* subscript out of range */ |
case FPE_FLTSUB: /* subscript out of range */ |
Line 369 void install_signal_handlers(void)
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Line 397 void install_signal_handlers(void)
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int sas_retval=-1; |
int sas_retval=-1; |
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sigstack.ss_size=SIGSTKSZ; |
sigstack.ss_size=SIGSTKSZ; |
if ((sigstack.ss_sp = my_alloc(sigstack.ss_size)) != NULL) { |
/* Actually the stack should only be ss_size large, and according to |
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SUSv2 ss_sp should point to the start of the stack, but |
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unfortunately Irix 6.5 (at least) expects ss_sp to point to the |
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end, so we work around this issue by accomodating everyone. */ |
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if ((sigstack.ss_sp = gforth_alloc(sigstack.ss_size*2)) != NULL) { |
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sigstack.ss_sp += sigstack.ss_size; |
sigstack.ss_flags=0; |
sigstack.ss_flags=0; |
sas_retval=sigaltstack(&sigstack,(stack_t *)0); |
sas_retval=sigaltstack(&sigstack,(stack_t *)0); |
} |
} |
Line 388 void install_signal_handlers(void)
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Line 421 void install_signal_handlers(void)
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bsd_signal(sigs_to_quit [i], graceful_exit); |
bsd_signal(sigs_to_quit [i], graceful_exit); |
#ifdef SA_SIGINFO |
#ifdef SA_SIGINFO |
if (!die_on_signal) { |
if (!die_on_signal) { |
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#ifdef SIGFPE |
install_signal_handler(SIGFPE, fpe_handler); |
install_signal_handler(SIGFPE, fpe_handler); |
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#endif |
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#ifdef SIGSEGV |
install_signal_handler(SIGSEGV, segv_handler); |
install_signal_handler(SIGSEGV, segv_handler); |
} |
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#endif |
#endif |
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/* use SA_ONSTACK for all signals that could come from executing |
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wrong code */ |
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#ifdef SIGILL |
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install_signal_handler(SIGILL, sigaction_throw); |
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#endif |
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#ifdef SIGBUS |
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install_signal_handler(SIGBUS, sigaction_throw); |
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#endif |
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#ifdef SIGTRAP |
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install_signal_handler(SIGTRAP, sigaction_throw); |
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#endif |
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} |
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#endif /* defined(SA_SIGINFO) */ |
#ifdef SIGCONT |
#ifdef SIGCONT |
bsd_signal(SIGCONT, termprep); |
bsd_signal(SIGCONT, termprep); |
#endif |
#endif |