1 files changed, 130 insertions, 0 deletions
diff --git a/lib/libc/alpha/SYS.h b/lib/libc/alpha/SYS.h
new file mode 100644
index 0000000..6e0d522
--- /dev/null
+++ b/lib/libc/alpha/SYS.h
@@ -0,0 +1,130 @@
+/* $FreeBSD$ */
+/*	From: NetBSD: SYS.h,v 1.5 1997/05/02 18:15:15 kleink Exp */
+
+/*
+ * Copyright (c) 1994, 1995 Carnegie-Mellon University.
+ * All rights reserved.
+ *
+ * Author: Chris G. Demetriou
+ * 
+ * Permission to use, copy, modify and distribute this software and
+ * its documentation is hereby granted, provided that both the copyright
+ * notice and this permission notice appear in all copies of the
+ * software, derivative works or modified versions, and any portions
+ * thereof, and that both notices appear in supporting documentation.
+ * 
+ * CARNEGIE MELLON ALLOWS FREE USE OF THIS SOFTWARE IN ITS "AS IS" 
+ * CONDITION.  CARNEGIE MELLON DISCLAIMS ANY LIABILITY OF ANY KIND 
+ * FOR ANY DAMAGES WHATSOEVER RESULTING FROM THE USE OF THIS SOFTWARE.
+ * 
+ * Carnegie Mellon requests users of this software to return to
+ *
+ *  Software Distribution Coordinator  or  Software.Distribution@CS.CMU.EDU
+ *  School of Computer Science
+ *  Carnegie Mellon University
+ *  Pittsburgh PA 15213-3890
+ *
+ * any improvements or extensions that they make and grant Carnegie the
+ * rights to redistribute these changes.
+ */
+
+#include <machine/asm.h>
+#ifdef __NETBSD_SYSCALLS
+#include <sys/netbsd_syscall.h>
+#else
+#include <sys/syscall.h>
+#endif
+
+#define	CALLSYS_ERROR(name)					\
+	CALLSYS_NOERROR(name);					\
+	br	gp, LLABEL(name,0);				\
+LLABEL(name,0):							\
+	LDGP(gp);						\
+	beq	a3, LLABEL(name,1);				\
+	jmp	zero, .cerror;					\
+LLABEL(name,1):
+
+
+#define	SYSCALL(name)						\
+LEAF(name,0);				/* XXX # of args? */	\
+	CALLSYS_ERROR(name)
+
+#define	SYSCALL_NOERROR(name)					\
+LEAF(name,0);				/* XXX # of args? */	\
+	CALLSYS_NOERROR(name)
+
+
+#define RSYSCALL(name)						\
+	SYSCALL(name);						\
+	RET;							\
+END(name)
+
+#define RSYSCALL_NOERROR(name)					\
+	SYSCALL_NOERROR(name);					\
+	RET;							\
+END(name)
+
+
+#define	PSEUDO(label,name)					\
+LEAF(label,0);				/* XXX # of args? */	\
+	CALLSYS_ERROR(name);					\
+	RET;							\
+END(label);
+
+#define	PSEUDO_NOERROR(label,name)				\
+LEAF(label,0);				/* XXX # of args? */	\
+	CALLSYS_NOERROR(name);					\
+	RET;							\
+END(label);
+
+/*
+ * Design note:
+ *
+ * The macros PSYSCALL() and PRSYSCALL() are intended for use where a
+ * syscall needs to be renamed in the threaded library. When building
+ * a normal library, they default to the traditional SYSCALL() and
+ * RSYSCALL(). This avoids the need to #ifdef _THREAD_SAFE everywhere
+ * that the renamed function needs to be called.
+ */
+#ifdef _THREAD_SAFE
+/*
+ * For the thread_safe versions, we prepend _thread_sys_ to the function
+ * name so that the 'C' wrapper can go around the real name.
+ */
+#define	PCALL(name)						\
+	CALL(___CONCAT(_thread_sys_,name))
+
+#define	PLEAF(name, args)					\
+LEAF(___CONCAT(_thread_sys_,name),args)
+
+#define	PEND(name)						\
+END(___CONCAT(_thread_sys_,name))
+
+#define	PSYSCALL(name)						\
+PLEAF(name,0);				/* XXX # of args? */	\
+	CALLSYS_ERROR(name)
+
+#define	PRSYSCALL(name)						\
+PLEAF(name,0);				/* XXX # of args? */	\
+	CALLSYS_ERROR(name)					\
+	RET;							\
+PEND(name)
+
+#define	PPSEUDO(label,name)					\
+PLEAF(label,0);				/* XXX # of args? */	\
+	CALLSYS_ERROR(name);					\
+	RET;							\
+PEND(label)
+
+#else
+/*
+ * The non-threaded library defaults to traditional syscalls where
+ * the function name matches the syscall name.
+ */
+#define	PSYSCALL(x)	SYSCALL(x)
+#define	PRSYSCALL(x)	RSYSCALL(x)
+#define	PPSEUDO(x,y)	PSEUDO(x,y)
+#define	PLEAF(x,y)	LEAF(x,y)
+#define	PEND(x)		END(x)
+#define	PCALL(x)	CALL(x)
+#endif