* debug.h: Add regparm attributes to some functions.

* signal.cc (sigaction): Don't treat SIGCONT specially.
* exceptions.cc (interrupt_setup): Save sa_flags of interrupted signal for
later use.
(sig_handler): Default any stopping signal to SIGSTOP.
(call_signal_handler): New function.
(sigdelayed0): New function.
* sigproc.cc (sigproc_init): Initialize SIGSTOP sigaction for special behavior.
* sigproc.h: Define call_signal_handler.
* syscalls.cc (_read): Allow restartable signal behavior.

winsup/cygwin/perthread.h

@@ -1,6 +1,6 @@
 /* perthread.h: Header file for cygwin synchronization primitives.
 
-   Copyright 2000 Cygnus Solutions.
+   Copyright 2000, 2001 Red Hat, Inc.
 
    Written by Christopher Faylor <cgf@cygnus.com>
 
@@ -96,6 +96,7 @@ struct signal_dispatch
   void (*func) (int);
   int sig;
   int saved_errno;
+  int sa_flags;
   DWORD oldmask;
   DWORD newmask;
   DWORD retaddr;