mirror of
git://source.winehq.org/git/wine.git
synced 2024-11-02 13:27:35 +00:00
203 lines
5 KiB
C
203 lines
5 KiB
C
/*
|
|
* Wine signal handling
|
|
*
|
|
*/
|
|
|
|
#include "config.h"
|
|
|
|
#include <stdio.h>
|
|
#include <stdlib.h>
|
|
#include <signal.h>
|
|
#include <string.h>
|
|
#include <errno.h>
|
|
#include <time.h>
|
|
#include <setjmp.h>
|
|
|
|
#include <sys/time.h>
|
|
#include <sys/timeb.h>
|
|
#include <sys/types.h>
|
|
#include <sys/wait.h>
|
|
|
|
#ifdef HAVE_SYS_PARAM_H
|
|
# include <sys/param.h>
|
|
#endif
|
|
#ifdef HAVE_SYSCALL_H
|
|
# include <syscall.h>
|
|
#else
|
|
# ifdef HAVE_SYS_SYSCALL_H
|
|
# include <sys/syscall.h>
|
|
# endif
|
|
#endif
|
|
|
|
#include "miscemu.h"
|
|
#include "selectors.h"
|
|
#include "sig_context.h"
|
|
#include "winsock.h"
|
|
|
|
/* Linux sigaction function */
|
|
|
|
#if defined(linux) && defined(__i386__)
|
|
/* This is the sigaction structure from the Linux 2.1.20 kernel. */
|
|
#undef sa_handler
|
|
struct kernel_sigaction
|
|
{
|
|
void (*sa_handler)();
|
|
unsigned long sa_mask;
|
|
unsigned long sa_flags;
|
|
void (*sa_restorer)();
|
|
};
|
|
|
|
/* Similar to the sigaction function in libc, except it leaves alone the
|
|
restorer field, which is used to specify the signal stack address */
|
|
static __inline__ int wine_sigaction( int sig, struct kernel_sigaction *new,
|
|
struct kernel_sigaction *old )
|
|
{
|
|
#ifdef __PIC__
|
|
__asm__ __volatile__( "pushl %%ebx\n\t"
|
|
"movl %2,%%ebx\n\t"
|
|
"int $0x80\n\t"
|
|
"popl %%ebx"
|
|
: "=a" (sig)
|
|
: "0" (SYS_sigaction),
|
|
"g" (sig),
|
|
"c" (new),
|
|
"d" (old) );
|
|
#else
|
|
__asm__ __volatile__( "int $0x80"
|
|
: "=a" (sig)
|
|
: "0" (SYS_sigaction),
|
|
"b" (sig),
|
|
"c" (new),
|
|
"d" (old) );
|
|
#endif /* __PIC__ */
|
|
if (sig>=0)
|
|
return 0;
|
|
errno = -sig;
|
|
return -1;
|
|
}
|
|
#endif /* linux && __i386__ */
|
|
|
|
/* Signal stack */
|
|
|
|
static char SIGNAL_Stack[16384];
|
|
static sigset_t async_signal_set;
|
|
|
|
/**********************************************************************
|
|
* SIGNAL_child
|
|
*
|
|
* wait4 terminated child processes
|
|
*/
|
|
static HANDLER_DEF(SIGNAL_child)
|
|
{
|
|
HANDLER_INIT();
|
|
#ifdef HAVE_WAIT4
|
|
wait4( 0, NULL, WNOHANG, NULL);
|
|
#elif defined (HAVE_WAITPID)
|
|
/* I am sort-of guessing that this is the same as the wait4 call. */
|
|
waitpid (0, NULL, WNOHANG);
|
|
#else
|
|
wait(NULL);
|
|
#endif
|
|
}
|
|
|
|
|
|
/**********************************************************************
|
|
* SIGNAL_SetHandler
|
|
*/
|
|
void SIGNAL_SetHandler( int sig, void (*func)(), int flags )
|
|
{
|
|
int ret;
|
|
|
|
#if defined(linux) && defined(__i386__)
|
|
|
|
struct kernel_sigaction sig_act;
|
|
sig_act.sa_handler = func;
|
|
sig_act.sa_flags = SA_RESTART | (flags) ? SA_NOMASK : 0;
|
|
sig_act.sa_mask = 0;
|
|
/* Point to the top of the stack, minus 4 just in case, and make
|
|
it aligned */
|
|
sig_act.sa_restorer =
|
|
(void (*)())((int)(SIGNAL_Stack + sizeof(SIGNAL_Stack) - 4) & ~3);
|
|
ret = wine_sigaction( sig, &sig_act, NULL );
|
|
|
|
#else /* linux && __i386__ */
|
|
|
|
struct sigaction sig_act;
|
|
sig_act.sa_handler = func;
|
|
sigemptyset( &sig_act.sa_mask );
|
|
|
|
# if defined(__NetBSD__) || defined(__FreeBSD__) || defined(__OpenBSD__)
|
|
sig_act.sa_flags = SA_ONSTACK;
|
|
# elif defined (__svr4__) || defined(_SCO_DS)
|
|
sig_act.sa_flags = SA_SIGINFO | SA_ONSTACK | SA_RESTART;
|
|
# elif defined(__EMX__)
|
|
sig_act.sa_flags = 0; /* FIXME: EMX has only SA_ACK and SA_SYSV */
|
|
# else
|
|
sig_act.sa_flags = 0;
|
|
# endif
|
|
ret = sigaction( sig, &sig_act, NULL );
|
|
|
|
#endif /* linux && __i386__ */
|
|
|
|
if (ret < 0)
|
|
{
|
|
perror( "sigaction" );
|
|
exit(1);
|
|
}
|
|
}
|
|
|
|
extern void stop_wait(int a);
|
|
extern void WINSOCK_sigio(int a);
|
|
extern void ASYNC_sigio(int a);
|
|
|
|
|
|
/**********************************************************************
|
|
* SIGNAL_Init
|
|
*/
|
|
BOOL32 SIGNAL_Init(void)
|
|
{
|
|
extern void SYNC_SetupSignals(void);
|
|
|
|
#ifdef HAVE_WORKING_SIGALTSTACK
|
|
struct sigaltstack ss;
|
|
ss.ss_sp = SIGNAL_Stack;
|
|
ss.ss_size = sizeof(SIGNAL_Stack);
|
|
ss.ss_flags = 0;
|
|
if (sigaltstack(&ss, NULL) < 0)
|
|
{
|
|
perror("sigstack");
|
|
return FALSE;
|
|
}
|
|
#endif /* HAVE_SIGALTSTACK */
|
|
|
|
sigemptyset(&async_signal_set);
|
|
|
|
SIGNAL_SetHandler( SIGCHLD, (void (*)())SIGNAL_child, 1);
|
|
#ifdef CONFIG_IPC
|
|
sigaddset(&async_signal_set, SIGUSR2);
|
|
SIGNAL_SetHandler( SIGUSR2, (void (*)())stop_wait, 1); /* For IPC */
|
|
#endif
|
|
#ifdef SIGIO
|
|
sigaddset(&async_signal_set, SIGIO);
|
|
/* SIGNAL_SetHandler( SIGIO, (void (*)())WINSOCK_sigio, 0); */
|
|
SIGNAL_SetHandler( SIGIO, (void (*)())ASYNC_sigio, 0);
|
|
#endif
|
|
|
|
sigaddset(&async_signal_set, SIGALRM);
|
|
|
|
/* ignore SIGPIPE so that WINSOCK can get a EPIPE error instead */
|
|
signal (SIGPIPE, SIG_IGN);
|
|
|
|
SYNC_SetupSignals();
|
|
return TRUE;
|
|
}
|
|
|
|
|
|
/**********************************************************************
|
|
* SIGNAL_MaskAsyncEvents
|
|
*/
|
|
void SIGNAL_MaskAsyncEvents( BOOL32 flag )
|
|
{
|
|
sigprocmask( (flag) ? SIG_BLOCK : SIG_UNBLOCK , &async_signal_set, NULL);
|
|
}
|
|
|