Cancellation handling for m68k.

linuxthreads/sysdeps/unix/sysv/linux/m68k/sysdep-cancel.h

@@ -0,0 +1,114 @@
+/* Copyright (C) 2002 Free Software Foundation, Inc.
+   This file is part of the GNU C Library.
+   Contributed by Andreas Schwab <schwab@suse.de>, 2002.
+
+   The GNU C Library is free software; you can redistribute it and/or
+   modify it under the terms of the GNU Lesser General Public
+   License as published by the Free Software Foundation; either
+   version 2.1 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
+   Lesser General Public License for more details.
+
+   You should have received a copy of the GNU Lesser General Public
+   License along with the GNU C Library; if not, write to the Free
+   Software Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA
+   02111-1307 USA.  */
+
+#include <sysdep.h>
+#ifndef ASSEMBLER
+# include <linuxthreads/internals.h>
+#endif
+
+#if !defined NOT_IN_libc || defined IS_IN_libpthread
+
+# undef PSEUDO
+# define PSEUDO(name, syscall_name, args)				      \
+  .text;								      \
+  ENTRY (name)								      \
+    SINGLE_THREAD_P;							      \
+    jne .Lpseudo_cancel;						      \
+    DO_CALL (syscall_name, args);					      \
+    cmp.l &-4095, %d0;							      \
+    jcc SYSCALL_ERROR_LABEL;						      \
+    rts;								      \
+  .Lpseudo_cancel:							      \
+    CENABLE;								      \
+    DOCARGS_##args							      \
+    move.l &SYS_ify (syscall_name), %d0;				      \
+    trap &0;								      \
+    move.l %d0, %d2;							      \
+    CDISABLE;								      \
+    addq.l &4, %sp;							      \
+    move.l %d2, %d0;							      \
+    UNDOCARGS_##args							      \
+    cmp.l &-4095, %d0;							      \
+    jcc SYSCALL_ERROR_LABEL
+
+# define DOCARGS_0	move.l %d2, -(%sp);
+# define _DOCARGS_0(n)
+# define UNDOCARGS_0	move.l (%sp)+, %d2;
+
+# define DOCARGS_1	_DOCARGS_1 (4); DOCARGS_0
+# define _DOCARGS_1(n)	move.l n(%sp), %d1; _DOARGS_0 (n)
+# define UNDOCARGS_1	UNDOCARGS_0
+
+# define DOCARGS_2	_DOCARGS_2 (8)
+# define _DOCARGS_2(n)	move.l %d2, -(%sp); move.l n+4(%sp), %d2;	\
+			_DOCARGS_1 (n)
+# define UNDOCARGS_2	UNDOCARGS_1
+
+# define DOCARGS_3	_DOCARGS_3 (12)
+# define _DOCARGS_3(n)	move.l %d3, -(%sp); move.l n+4(%sp), %d3;	\
+  	 		_DOCARGS_2 (n)
+# define UNDOCARGS_3	UNDOCARGS_2; move.l (%sp)+, %d3;
+
+# define DOCARGS_4	_DOCARGS_4 (16)
+# define _DOCARGS_4(n)	move.l %d4, -(%sp); move.l n+4(%sp), %d4;	\
+			_DOCARGS_3 (n)
+# define UNDOCARGS_4	UNDOCARGS_3; move.l (%sp)+, %d4;
+
+# define DOCARGS_5	_DOCARGS_5 (20)
+# define _DOCARGS_5(n)	move.l %d5, -(%sp); move.l n+4(%sp), %d5;	\
+			_DOCARGS_4 (n)
+# define UNDOCARGS_5	UNDOCARGS_4; move.l (%sp)+, %d5;
+
+# ifdef IS_IN_libpthread
+#  define CENABLE	jbsr __pthread_enable_asynccancel
+#  define CDISABLE	jbsr __pthread_disable_asynccancel
+# else
+#  define CENABLE	jbsr __libc_enable_asynccancel
+#  define CDISABLE	jbsr __libc_disable_asynccancel
+# endif
+
+# if !defined NOT_IN_libc
+#  define __local_multiple_threads __libc_multiple_threads
+# else
+#  define __local_multiple_threads __pthread_multiple_threads
+# endif
+
+# ifndef ASSEMBLER
+extern int __local_multiple_threads attribute_hidden;
+#  define SINGLE_THREAD_P __builtin_expect (__local_multiple_threads == 0, 1)
+# else
+#  if !defined PIC
+#   define SINGLE_THREAD_P tst.l __local_multiple_threads
+#  else
+#   if !defined HAVE_HIDDEN || !USE___THREAD
+#    define SINGLE_THREAD_P \
+  tst.l (__local_multiple_threads@GOTPC, %pc)
+#   else
+#    define SINGLE_THREAD_P \
+  tst.l  (__local_multiple_threads@GOTPC, %pc)
+#   endif
+#  endif
+# endif
+
+#elif !defined ASSEMBLER
+
+/* This code should never be used but we define it anyhow.  */
+# define SINGLE_THREAD_P (1)
+
+#endif