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authorRoland McGrath <roland@gnu.org>1996-01-04 17:00:45 +0000
committerRoland McGrath <roland@gnu.org>1996-01-04 17:00:45 +0000
commit7974fe2117b1308a46f16ae5803c64f75303521c (patch)
tree74144df8a67fabc8cc766351fffa87baaa8c909a /hurd/hurdfault.c
parentfb8e70d6dd3a9c3a0e0d2713b5be3cbc9d7a6409 (diff)
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Thu Jan 4 11:35:18 1996 Roland McGrath <roland@churchy.gnu.ai.mit.edu>
* sysdeps/mach/hurd/setitimer.c: Code rearranged a bit to use new preemption interface. * sysdeps/mach/hurd/i386/trampoline.c (_hurd_setup_sighandler): Use _hurdsig_catch_memory_fault. * hurd/Makefile (headers): Add hurd/sigpreempt.h. (sig): Add catch-signal. * hurd/hurdfault.c (_hurdsig_fault_catch_exception_raise): Rewritten using a preempter in new interface. * hurd/hurdfault.h (_hurdsig_catch_fault): Likewise. (_hurdsig_catch_memory_fault): New macro.
Diffstat (limited to 'hurd/hurdfault.c')
-rw-r--r--hurd/hurdfault.c42
1 files changed, 21 insertions, 21 deletions
diff --git a/hurd/hurdfault.c b/hurd/hurdfault.c
index 5aedc58..2a30db0 100644
--- a/hurd/hurdfault.c
+++ b/hurd/hurdfault.c
@@ -1,5 +1,5 @@
/* Handle faults in the signal thread.
-Copyright (C) 1994, 1995 Free Software Foundation, Inc.
+Copyright (C) 1994, 1995, 1996 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
@@ -29,13 +29,10 @@ Cambridge, MA 02139, USA. */
#include <assert.h>
jmp_buf _hurdsig_fault_env;
+struct hurd_signal_preempter _hurdsig_fault_preempter;
static mach_port_t forward_sigexc;
-int _hurdsig_fault_expect_signo;
-long int _hurdsig_fault_sigcode;
-int _hurdsig_fault_sigerror;
-
kern_return_t
_hurdsig_fault_catch_exception_raise (mach_port_t port,
thread_t thread,
@@ -45,6 +42,8 @@ _hurdsig_fault_catch_exception_raise (mach_port_t port,
int subcode)
{
int signo;
+ long int sigcode;
+ int sigerror;
if (port != forward_sigexc ||
thread != _hurd_msgport_thread || task != __mach_task_self ())
@@ -52,10 +51,11 @@ _hurdsig_fault_catch_exception_raise (mach_port_t port,
/* Call the machine-dependent function to translate the Mach exception
codes into a signal number and subcode. */
- _hurd_exception2signal (exception, code, subcode, &signo,
- &_hurdsig_fault_sigcode, &_hurdsig_fault_sigerror);
+ _hurd_exception2signal (exception, code, subcode,
+ &signo, &sigcode, &sigerror);
- return signo == _hurdsig_fault_expect_signo ? 0 : EGREGIOUS;
+ return HURD_PREEMPT_SIGNAL_P (&_hurdsig_fault_preempter, signo, sigcode)
+ ? 0 : EGREGIOUS;
}
static void
@@ -85,19 +85,17 @@ faulted (void)
/* Run the exc demuxer which should call the server function above.
That function returns 0 if the exception was expected. */
- switch (_hurdsig_fault_exc_server (&request.head, &reply.head))
- {
- case KERN_SUCCESS:
- if (reply.head.msgh_remote_port != MACH_PORT_NULL)
- __mach_msg (&reply.head, MACH_SEND_MSG, reply.head.msgh_size,
- 0, MACH_PORT_NULL, MACH_MSG_TIMEOUT_NONE, MACH_PORT_NULL);
- break;
- default:
- __mach_msg_destroy (&request.head);
- case MIG_NO_REPLY:
- }
-
- _hurdsig_fault_expect_signo = 0;
+ _hurdsig_fault_exc_server (&request.head, &reply.head);
+ if (reply.head.msgh_remote_port != MACH_PORT_NULL)
+ __mach_msg (&reply.head, MACH_SEND_MSG, reply.head.msgh_size,
+ 0, MACH_PORT_NULL, MACH_MSG_TIMEOUT_NONE, MACH_PORT_NULL);
+ if (reply.result == MIG_BAD_ID)
+ __mach_msg_destroy (&request.head);
+
+ if (reply.result)
+ __libc_fatal ("BUG: unexpected fault in signal thread\n");
+
+ _hurdsig_fault_preempter.signals = 0;
longjmp (_hurdsig_fault_env, 1);
}
@@ -125,8 +123,10 @@ _hurdsig_fault_init (void)
err = __mach_port_insert_right (__mach_task_self (), sigexc,
sigexc, MACH_MSG_TYPE_MAKE_SEND);
assert_perror (err);
+#if 0 /* XXX gdb bites */
err = __thread_set_special_port (_hurd_msgport_thread,
THREAD_EXCEPTION_PORT, sigexc);
+#endif
__mach_port_deallocate (__mach_task_self (), sigexc);
assert_perror (err);