Merge glibc-ports into ports/ directory.glibc-2.16-ports-merge

1 files changed, 47 insertions, 0 deletions

diff --git a/ports/sysdeps/unix/sysv/linux/arm/syscall.S b/ports/sysdeps/unix/sysv/linux/arm/syscall.S
new file mode 100644
index 0000000000..3faf919d85
--- /dev/null
+++ b/ports/sysdeps/unix/sysv/linux/arm/syscall.S
@@ -0,0 +1,47 @@
+/* Copyright (C) 2005, 2009 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 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, see
+   <http://www.gnu.org/licenses/>.  */
+
+#include <sysdep.h>
+
+/* In the EABI syscall interface, we don't need a special syscall to
+   implement syscall().  It won't work reliably with 64-bit arguments
+   (but that is true on many modern platforms).  */
+
+ENTRY (syscall)
+	mov	ip, sp
+	stmfd	sp!, {r4, r5, r6, r7}
+	cfi_adjust_cfa_offset (16)
+	cfi_rel_offset (r4, 0)
+	cfi_rel_offset (r5, 4)
+	cfi_rel_offset (r6, 8)
+	cfi_rel_offset (r7, 12)
+	mov	r7, r0
+	mov	r0, r1
+	mov	r1, r2
+	mov	r2, r3
+	ldmfd	ip, {r3, r4, r5, r6}
+	swi	0x0
+	ldmfd	sp!, {r4, r5, r6, r7}
+	cfi_adjust_cfa_offset (-16)
+	cfi_restore (r4)
+	cfi_restore (r5)
+	cfi_restore (r6)
+	cfi_restore (r7)
+	cmn	r0, #4096
+	RETINSTR(cc, lr)
+	b	PLTJMP(syscall_error)
+PSEUDO_END (syscall)