version 1.1, 1999/02/28 08:37:45
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version 1.6, 2000/07/20 14:00:01
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#define _GNU_SOURCE |
#define _GNU_SOURCE |
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#include <stdio.h> |
#include <stdio.h> |
#include <signal.h> |
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#include <setjmp.h> |
#include <setjmp.h> |
#include <string.h> |
#include <string.h> |
#include <stdlib.h> |
#include <stdlib.h> |
#if !defined(apollo) && !defined(MSDOS) |
#if !defined(apollo) && !defined(MSDOS) |
#include <sys/ioctl.h> |
#include <sys/ioctl.h> |
#endif |
#endif |
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/* #include <asm/signal.h> */ |
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#include <signal.h> |
#include "config.h" |
#include "config.h" |
#include "forth.h" |
#include "forth.h" |
#include "io.h" |
#include "io.h" |
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UCell cols=DEFAULTCOLS; |
UCell cols=DEFAULTCOLS; |
UCell rows=DEFAULTROWS; |
UCell rows=DEFAULTROWS; |
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#ifdef SA_SIGINFO |
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void install_signal_handler(int sig, void (*handler)(int, siginfo_t *, void *)) |
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/* installs three-argument signal handler for sig */ |
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{ |
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struct sigaction action; |
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action.sa_sigaction=handler; |
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sigemptyset(&action.sa_mask); |
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action.sa_flags=SA_RESTART|SA_NODEFER|SA_SIGINFO; /* pass siginfo */ |
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sigaction(sig, &action, NULL); |
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} |
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#endif |
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typedef void Sigfunc(int); |
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Sigfunc *bsd_signal(int signo, Sigfunc *func) |
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{ |
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struct sigaction act, oact; |
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act.sa_handler=func; |
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sigemptyset(&act.sa_mask); |
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act.sa_flags=SA_NODEFER; |
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if (sigaction(signo,&act,&oact) < 0) |
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return SIG_ERR; |
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else |
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return oact.sa_handler; |
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} |
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static void |
static void |
graceful_exit (int sig) |
graceful_exit (int sig) |
Line 61 static void
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Line 89 static void
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signal_throw(int sig) |
signal_throw(int sig) |
{ |
{ |
int code; |
int code; |
struct { |
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int signal; |
switch (sig) { |
int throwcode; |
case SIGINT: code=-28; break; |
} *p, throwtable[] = { |
case SIGFPE: code=-55; break; |
{ SIGINT, -28 }, |
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{ SIGFPE, -55 }, |
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#ifdef SIGBUS |
#ifdef SIGBUS |
{ SIGBUS, -23 }, |
case SIGBUS: code=-23; break; |
#endif |
#endif |
{ SIGSEGV, -9 }, |
case SIGSEGV: code=-9; break; |
}; |
default: code=-256-sig; break; |
signal(sig,signal_throw); |
} |
for (code=-256-sig, p=throwtable; p<throwtable+(sizeof(throwtable)/sizeof(*p)); p++) |
longjmp(throw_jmp_buf,code); /* !! or use siglongjmp ? */ |
if (sig == p->signal) { |
} |
code = p->throwcode; |
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break; |
#ifdef SA_SIGINFO |
} |
static void fpe_handler(int sig, siginfo_t *info, void *_) |
longjmp(throw_jmp_buf,code); /* or use siglongjmp ? */ |
/* handler for SIGFPE */ |
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{ |
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int code; |
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switch(info->si_code) { |
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case FPE_INTDIV: code=-10; break; /* integer divide by zero */ |
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case FPE_INTOVF: code=-11; break; /* integer overflow */ |
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case FPE_FLTDIV: code=-42; break; /* floating point divide by zero */ |
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case FPE_FLTOVF: code=-43; break; /* floating point overflow */ |
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case FPE_FLTUND: code=-54; break; /* floating point underflow */ |
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case FPE_FLTRES: code=-41; break; /* floating point inexact result */ |
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case FPE_FLTINV: /* invalid floating point operation */ |
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case FPE_FLTSUB: /* subscript out of range */ |
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default: code=-55; break; |
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} |
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longjmp(throw_jmp_buf,code); |
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} |
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#define SPILLAGE 128 |
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/* if there's a SIGSEGV within SPILLAGE bytes of some stack, we assume |
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that this stack has over/underflowed */ |
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#define JUSTUNDER(addr1,addr2) (((UCell)((addr2)-1-(addr1)))<SPILLAGE) |
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/* true is addr1 is just under addr2 */ |
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#define JUSTOVER(addr1,addr2) (((UCell)((addr1)-(addr2)))<SPILLAGE) |
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#define NEXTPAGE(addr) ((Address)((((UCell)(addr)-1)&-pagesize)+pagesize)) |
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static void segv_handler(int sig, siginfo_t *info, void *_) |
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{ |
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int code=-9; |
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Address addr=info->si_addr; |
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ImageHeader *h=gforth_header; |
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if (JUSTUNDER(addr, h->data_stack_base)) |
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code=-3; |
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else if (JUSTOVER(addr, NEXTPAGE(h->data_stack_base+h->data_stack_size))) |
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code=-4; |
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else if (JUSTUNDER(addr, h->return_stack_base)) |
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code=-5; |
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else if (JUSTOVER(addr, NEXTPAGE(h->return_stack_base+h->return_stack_size))) |
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code=-6; |
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else if (JUSTUNDER(addr, h->fp_stack_base)) |
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code=-44; |
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else if (JUSTOVER(addr, NEXTPAGE(h->fp_stack_base+h->fp_stack_size))) |
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code=-45; |
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longjmp(throw_jmp_buf,code); |
} |
} |
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#endif /* defined(SA_SIGINFO) */ |
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#ifdef SIGCONT |
#ifdef SIGCONT |
static void termprep (int sig) |
static void termprep (int sig) |
{ |
{ |
signal(sig,termprep); |
bsd_signal(sig,termprep); |
terminal_prepped=0; |
terminal_prepped=0; |
} |
} |
#endif |
#endif |
Line 116 void get_winsize()
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Line 192 void get_winsize()
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#ifdef SIGWINCH |
#ifdef SIGWINCH |
static void change_winsize(int sig) |
static void change_winsize(int sig) |
{ |
{ |
signal(sig,change_winsize); |
/* signal(sig,change_winsize); should not be necessary with bsd_signal */ |
#ifdef TIOCGWINSZ |
#ifdef TIOCGWINSZ |
get_winsize(); |
get_winsize(); |
#endif |
#endif |
} |
} |
#endif |
#endif |
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void install_signal_handlers (void) |
void install_signal_handlers(void) |
{ |
{ |
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#if 0 |
#if 0 |
Line 256 void install_signal_handlers (void)
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Line 332 void install_signal_handlers (void)
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#endif |
#endif |
}; |
}; |
static short sigs_to_quit [] = { |
static short sigs_to_quit [] = { |
#ifdef SIGHUP |
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SIGHUP, |
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#endif |
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#ifdef SIGQUIT |
#ifdef SIGQUIT |
SIGQUIT, |
SIGQUIT, |
#endif |
#endif |
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#ifdef SIGHUP |
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SIGHUP, |
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#endif |
#ifdef SIGABRT |
#ifdef SIGABRT |
SIGABRT, |
SIGABRT, |
#endif |
#endif |
Line 273 void install_signal_handlers (void)
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Line 349 void install_signal_handlers (void)
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#endif |
#endif |
}; |
}; |
int i; |
int i; |
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void (*throw_handler)() = die_on_signal ? graceful_exit : signal_throw; |
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#define DIM(X) (sizeof (X) / sizeof *(X)) |
#define DIM(X) (sizeof (X) / sizeof *(X)) |
/* |
/* |
Line 280 void install_signal_handlers (void)
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Line 357 void install_signal_handlers (void)
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signal (sigs_to_ignore [i], SIG_IGN); |
signal (sigs_to_ignore [i], SIG_IGN); |
*/ |
*/ |
for (i = 0; i < DIM (sigs_to_throw); i++) |
for (i = 0; i < DIM (sigs_to_throw); i++) |
signal (sigs_to_throw [i], die_on_signal ? graceful_exit : signal_throw); |
bsd_signal(sigs_to_throw[i], throw_handler); |
for (i = 0; i < DIM (sigs_to_quit); i++) |
for (i = 0; i < DIM (sigs_to_quit); i++) |
signal (sigs_to_quit [i], graceful_exit); |
bsd_signal(sigs_to_quit [i], graceful_exit); |
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#ifdef SA_SIGINFO |
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install_signal_handler(SIGFPE, fpe_handler); |
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install_signal_handler(SIGSEGV, segv_handler); |
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#endif |
#ifdef SIGCONT |
#ifdef SIGCONT |
signal (SIGCONT, termprep); |
bsd_signal(SIGCONT, termprep); |
#endif |
#endif |
#ifdef SIGWINCH |
#ifdef SIGWINCH |
signal (SIGWINCH, change_winsize); |
bsd_signal(SIGWINCH, change_winsize); |
#endif |
#endif |
} |
} |