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Thu Jan 4 11:35:18 1996 Roland McGrath <roland@churchy.gnu.ai.mit.edu>

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* 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.
This commit is contained in:
Roland McGrath
1996-01-04 17:00:45 +00:00
parent fb8e70d6dd
commit 7974fe2117
6 changed files with 101 additions and 80 deletions
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24
hurd/hurdfault.h
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@@ -1,5 +1,5 @@
/* Declarations for handling faults in the signal thread.
Copyright (C) 1994 Free Software Foundation, Inc.
Copyright (C) 1994, 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
@@ -20,6 +20,7 @@ Cambridge, MA 02139, USA. */
#ifndef _HURD_FAULT_H
#define _HURD_FAULT_H
#include <hurd/sigpreempt.h>
#include <setjmp.h>
/* Call this before code that might fault in the signal thread; SIGNO is
@@ -27,23 +28,24 @@ Cambridge, MA 02139, USA. */
returns zero the first time, and returns again nonzero if the signal
does arrive. */
#define _hurdsig_catch_fault(signo) \
(_hurdsig_fault_expect_signo = (signo), setjmp (_hurdsig_fault_env))
#define _hurdsig_catch_fault(sigset, firstcode, lastcode) \
(_hurdsig_fault_preempter.signals = (sigset), \
_hurdsig_fault_preempter.first = (long int) (firstcode), \
_hurdsig_fault_preempter.last = (long int) (lastcode), \
setjmp (_hurdsig_fault_env))
/* Call this at the end of a section protected by _hurdsig_catch_fault. */
#define _hurdsig_end_catch_fault() \
(_hurdsig_fault_expect_signo = 0)
(_hurdsig_fault_preempter.signals = 0)
extern jmp_buf _hurdsig_fault_env;
extern int _hurdsig_fault_expect_signo;
/* If _hurdsig_catch_fault returns nonzero, these variables
contain information about the signal that arrived. */
extern struct hurd_signal_preempter _hurdsig_fault_preempter;
#define _hurdsig_catch_memory_fault(object) \
_hurdsig_catch_fault (sigmask (SIGSEGV) | sigmask (SIGBUS), \
(object), (object) + 1)
extern long int _hurdsig_fault_sigcode;
extern int _hurdsig_fault_sigerror;
#endif /* hurd/fault.h */
#endif /* hurdfault.h */