1/* Copyright (C) 2001-2022 Free Software Foundation, Inc.
2   This file is part of the GNU C Library.
3
4   The GNU C Library is free software; you can redistribute it and/or
5   modify it under the terms of the GNU Lesser General Public
6   License as published by the Free Software Foundation; either
7   version 2.1 of the License, or (at your option) any later version.
8
9   The GNU C Library is distributed in the hope that it will be useful,
10   but WITHOUT ANY WARRANTY; without even the implied warranty of
11   MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the GNU
12   Lesser General Public License for more details.
13
14   You should have received a copy of the GNU Lesser General Public
15   License along with the GNU C Library; if not, see
16   <https://www.gnu.org/licenses/>.  */
17
18#include <sysdep.h>
19
20/* Please consult the file sysdeps/unix/sysv/linux/x86-64/sysdep.h for
21   more information about the value -4095 used below.  */
22
23/* Usage: long syscall (syscall_number, arg1, arg2, arg3, arg4, arg5, arg6)
24   We need to do some arg shifting, the syscall_number will be in
25   rax.  */
26
27
28	.text
29ENTRY (syscall)
30	movq %rdi, %rax		/* Syscall number -> rax.  */
31	movq %rsi, %rdi		/* shift arg1 - arg5.  */
32	movq %rdx, %rsi
33	movq %rcx, %rdx
34	movq %r8, %r10
35	movq %r9, %r8
36	movq 8(%rsp),%r9	/* arg6 is on the stack.  */
37	syscall			/* Do the system call.  */
38	cmpq $-4095, %rax	/* Check %rax for error.  */
39	jae SYSCALL_ERROR_LABEL	/* Jump to error handler if error.  */
40	ret			/* Return to caller.  */
41
42PSEUDO_END (syscall)
43