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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;
- }
-