1/* Copyright (C) 1993-2022 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
20ENTRY (syscall)
21 popl %ecx /* Pop return address into %ecx. */
22 popl %eax /* Pop syscall number into %eax. */
23 pushl %ecx /* Push back return address. */
24 .byte 0x9a, 0, 0, 0, 0, 7, 0 /* lcall $7, $0 -- gas bug */
25 popl %ecx /* Pop return address into %ecx. */
26 pushl $0 /* Push back dumb syscall number. */
27 pushl %ecx /* Push back return address. */
28 ret
29END (syscall)
30

source code of glibc/sysdeps/mach/i386/syscall.S