Initial revision

sysdeps/unix/bsd/sequent/i386/sysdep.h

@@ -0,0 +1,87 @@
+/* System call interface code for Sequent Symmetry running Dynix version 3.
+Copyright (C) 1993 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
+modify it under the terms of the GNU Library General Public License as
+published by the Free Software Foundation; either version 2 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
+Library General Public License for more details.
+
+You should have received a copy of the GNU Library General Public
+License along with the GNU C Library; see the file COPYING.LIB.  If
+not, write to the Free Software Foundation, Inc., 675 Mass Ave,
+Cambridge, MA 02139, USA.  */
+
+#include <sysdeps/unix/sysdep.h>
+
+/* Get the symbols for system call interrupts.  */
+#include <machine/trap.h>
+
+#ifdef	__STDC__
+#define	ENTRY(name)							      \
+  .globl _##name;							      \
+  .align 4;								      \
+  _##name##:
+#else
+#define	ENTRY(name)							      \
+  .globl _/**/name;							      \
+  .align 4;								      \
+  _/**/name/**/:
+#endif
+  
+/* Use the BSD versions of system calls, by setting the high 16 bits
+   of the syscall number (see /usr/include/syscall.h).  */
+#define SYS_HANDLER SYS_bsd##0000
+
+/* Dynix uses an interrupt interface to system calls.
+   "int $T_SVCn" are syscall interfaces for 0-6 arg functions.
+   (see /usr/include/machine/trap.h).  */
+
+#ifdef	__STDC__
+#define DO_CALL(syscall_name, args) 					      \
+  movl $(SYS_HANDLER | SYS_##syscall_name), %eax;			      \
+  int $T_SVC##args;
+#else
+#define DO_CALL(syscall_name, args)					      \
+  movl $(SYS_HANDLER | SYS_/**/syscall_name), %eax;			      \
+  int $T_SVC/**/args;
+#endif
+
+#define	PSEUDO(name, syscall_name, args)				      \
+  .text;								      \
+  .globl syscall_error;							      \
+  .align 4;								      \
+  ENTRY (name)								      \
+  ARGS (args)								      \
+  DO_CALL (syscall_name, args)						      \
+  jb syscall_error
+
+/* For one and two-argument calls, Dynix takes the arguments in %ecx and
+   %edx.  For 3-6 argument calls, Dynix takes the address of the first
+   argument in %ecx.  */
+
+#ifdef __STDC__
+#define ARGS(n) ARGS_##n
+#else
+#define ARGS(n) ARGS_/**/n
+#endif
+
+#define ARGS_0
+#define ARGS_1	movl 4(%esp), %ecx;
+#define ARGS_2	movl 4(%esp), %ecx; movl 8(%esp), %edx;
+#define ARGS_3	leal 4(%esp), %ecx;
+#define ARGS_4	ARGS_3
+#define ARGS_5	ARGS_3
+#define ARGS_6	ARGS_3
+  
+/* Dynix reverses %ecx and %edx relative to most i386 Unices. */
+
+#define	r0		%eax	/* Normal return-value register.  */
+#define	r1		%ecx	/* Secondary return-value register.  */
+#define scratch 	%edx	/* Call-clobbered register for random use.  */
+#define MOVE(x,y)	movl x, y