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/* Copyright (C) 1994 Free Software Foundation, Inc.
This file is part of the GNU C Library.
The GNU C Library is free software; you can redistribute it and/or
modify it under the terms of the GNU Library General Public License as
published by the Free Software Foundation; either version 2 of the
License, or (at your option) any later version.
The GNU C Library is distributed in the hope that it will be useful,
but WITHOUT ANY WARRANTY; without even the implied warranty of
MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
Library General Public License for more details.
You should have received a copy of the GNU Library General Public
License along with the GNU C Library; see the file COPYING.LIB. If
not, write to the Free Software Foundation, Inc., 675 Mass Ave,
Cambridge, MA 02139, USA. */
#include <mach/exc_server.h>
#include <hurd/signal.h>
/* Called by the microkernel when a thread gets an exception. */
kern_return_t
_S_catch_exception_raise (mach_port_t port,
thread_t thread,
task_t task,
int exception,
int code,
int subcode)
{
int signo, sigcode, error;
struct hurd_sigstate *ss;
if (task != __mach_task_self ())
/* The sender wasn't the kernel. */
return EPERM;
/* Call the machine-dependent function to translate the Mach exception
codes into a signal number and subcode. */
_hurd_exception2signal (exception, code, subcode,
&signo, &sigcode, &error);
/* Find the sigstate structure for the faulting thread. */
__mutex_lock (&_hurd_siglock);
for (ss = _hurd_sigstates; ss != NULL; ss = ss->next)
if (ss->thread == thread)
break;
__mutex_unlock (&_hurd_siglock);
if (ss == NULL)
ss = _hurd_thread_sigstate (thread); /* Allocate a fresh one. */
if (__spin_lock_locked (&ss->lock.held))
/* Oops. The thread faulted with its sigstate lock held.
Bad scene. What to do? */
; /* XXX */
else
__mutex_lock (&ss->lock);
/* Post the signal. */
_hurd_internal_post_signal (ss, signo, sigcode, error,
MACH_PORT_NULL, MACH_MSG_TYPE_PORT_SEND);
return KERN_SUCCESS;
}
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