From 28f540f45bbacd939bfd07f213bcad2bf730b1bf Mon Sep 17 00:00:00 2001
From: Roland McGrath <roland@gnu.org>
Date: Sat, 18 Feb 1995 01:27:10 +0000
Subject: initial import

---
 sysdeps/unix/sysv/i386/linux/sysdep.h | 57 +++++++++++++++++++++++++++++++++++
 1 file changed, 57 insertions(+)
 create mode 100644 sysdeps/unix/sysv/i386/linux/sysdep.h

(limited to 'sysdeps/unix/sysv/i386/linux/sysdep.h')

diff --git a/sysdeps/unix/sysv/i386/linux/sysdep.h b/sysdeps/unix/sysv/i386/linux/sysdep.h
new file mode 100644
index 0000000..298a0e4
--- /dev/null
+++ b/sysdeps/unix/sysv/i386/linux/sysdep.h
@@ -0,0 +1,57 @@
+/* Copyright (C) 1992, 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>
+
+#define	ENTRY(name)							      \
+  .globl _##name;							      \
+  .align 2;								      \
+  _##name##:
+
+#define	PSEUDO(name, syscall_name, args)				      \
+  .text;								      \
+  .globl syscall_error;							      \
+  ENTRY (name)								      \
+    XCHG_##args
+    movl $SYS_##syscall_name, %eax;					      \
+    int $0x80;								      \
+    test %eax, %eax;							      \
+    jl syscall_error;							      \
+    XCHG_##args
+
+/* Linux takes system call arguments in registers:
+   	1: %ebx
+	2: %ecx
+	3: %edx
+	4: %esi
+	5: %edi
+   We put the arguments into registers from the stack,
+   and save the registers, by using the 386 `xchg' instruction
+   to swap the values in both directions.  */
+
+#define	XCHG_0	/* No arguments to frob.  */
+#define	XCHG_1	xchg 8(%esp), %ebx; XCHG_0
+#define	XCHG_2	xchg 12(%esp), %ecx; XCHG_1
+#define	XCHG_3	xchg 16(%esp), %edx; XCHG_2
+#define	XCHG_4	xchg 20(%esp), %esi; XCHG_3
+#define	XCHG_5	xchg 24(%esp), %edi; XCHG_3
+
+#define	r0		%eax	/* Normal return-value register.  */
+#define	r1		%edx	/* Secondary return-value register.  */
+#define scratch 	%ecx	/* Call-clobbered register for random use.  */
+#define MOVE(x,y)	movl x, y
-- 
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