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-rw-r--r--sysdeps/unix/sysv/linux/arm/syscall.S47
1 files changed, 47 insertions, 0 deletions
diff --git a/sysdeps/unix/sysv/linux/arm/syscall.S b/sysdeps/unix/sysv/linux/arm/syscall.S
new file mode 100644
index 0000000000..7a87278303
--- /dev/null
+++ b/sysdeps/unix/sysv/linux/arm/syscall.S
@@ -0,0 +1,47 @@
+/* Copyright (C) 1995, 1996 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., 59 Temple Place - Suite 330,
+   Boston, MA 02111-1307, USA.  */
+
+#include <sysdep.h>
+
+/* Please consult the file sysdeps/unix/sysv/linux/arm/sysdep.h for
+   more information about the value -4095 used below.*/
+
+	.text
+ENTRY (syscall)
+
+	/* Normally encoding the system call number in the instruction is
+	   good.  But we pay the price here.  */
+	
+	sub sp, sp, $0xc		@ get 3 words on the stack
+	orr r0, r0, $0xef000000		@ make up a SWI instruction
+	orr r0, r0, $SWI_BASE  
+	str r0, [sp]
+	ldr r0, _reti
+	str r0, [sp, $4]
+	adr r0, _ret
+	str r0, [sp, $8]
+	mov r0, r1
+	mov r1, r2
+	mov r2, r3
+	mov pc, sp
+_ret:	add sp, sp, $0xc
+	RETINSTR(mov, pc, r14)
+
+_reti:	.word	0xe51ff004	@ ldr pc, [pc, $4]
+	
+PSEUDO_END (syscall)