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[glibc.git] / sysdeps / unix / sysdep.h
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1 /* Copyright (C) 1991, 92, 93, 96, 98 Free Software Foundation, Inc.
2 This file is part of the GNU C Library.
4 The GNU C Library is free software; you can redistribute it and/or
5 modify it under the terms of the GNU Library General Public License as
6 published by the Free Software Foundation; either version 2 of the
7 License, or (at your option) any later version.
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 Library General Public License for more details.
14 You should have received a copy of the GNU Library General Public
15 License along with the GNU C Library; see the file COPYING.LIB. If not,
16 write to the Free Software Foundation, Inc., 59 Temple Place - Suite 330,
17 Boston, MA 02111-1307, USA. */
19 #include <sysdeps/generic/sysdep.h>
21 #include <sys/syscall.h>
22 #define HAVE_SYSCALLS
24 /* Note that using a `PASTE' macro loses. */
25 #ifdef __STDC__
26 #define SYSCALL__(name, args) PSEUDO (__##name, name, args)
27 #else
28 #define SYSCALL__(name, args) PSEUDO (__/**/name, name, args)
29 #endif
30 #define SYSCALL(name, args) PSEUDO (name, name, args)
32 /* Machine-dependent sysdep.h files are expected to define the macro
33 PSEUDO (function_name, syscall_name) to emit assembly code to define the
34 C-callable function FUNCTION_NAME to do system call SYSCALL_NAME.
35 r0 and r1 are the system call outputs. MOVE(x, y) should be defined as
36 an instruction such that "MOVE(r1, r0)" works. ret should be defined
37 as the return instruction. */
39 #ifdef __STDC__
40 #define SYS_ify(syscall_name) SYS_##syscall_name
41 #else
42 #define SYS_ify(syscall_name) SYS_/**/syscall_name
43 #endif
45 /* Terminate a system call named SYM. This is used on some platforms
46 to generate correct debugging information. */
47 #ifndef PSEUDO_END
48 #define PSEUDO_END(sym)
49 #endif
51 /* Wrappers around system calls should normally inline the system call code.
52 But sometimes it is not possible or implemented and we use this code. */
53 #define INLINE_SYSCALL(name, nr, args...) __syscall_##name (args)