L4Re Operating System Framework – Interface and Usage Documentation
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compiler.h
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1/*****************************************************************************/
7/*
8 * (c) 2008-2009 Adam Lackorzynski <adam@os.inf.tu-dresden.de>,
9 * Alexander Warg <warg@os.inf.tu-dresden.de>,
10 * Frank Mehnert <fm3@os.inf.tu-dresden.de>,
11 * Jork Löser <jork@os.inf.tu-dresden.de>,
12 * Ronald Aigner <ra3@os.inf.tu-dresden.de>
13 * economic rights: Technische Universität Dresden (Germany)
14 *
15 * This file is part of TUD:OS and distributed under the terms of the
16 * GNU General Public License 2.
17 * Please see the COPYING-GPL-2 file for details.
18 *
19 * As a special exception, you may use this file as part of a free software
20 * library without restriction. Specifically, if other files instantiate
21 * templates or use macros or inline functions from this file, or you compile
22 * this file and link it with other files to produce an executable, this
23 * file does not by itself cause the resulting executable to be covered by
24 * the GNU General Public License. This exception does not however
25 * invalidate any other reasons why the executable file might be covered by
26 * the GNU General Public License.
27 */
28/*****************************************************************************/
29#ifndef __L4_COMPILER_H__
30#define __L4_COMPILER_H__
31
32#if !defined(__ASSEMBLY__) && !defined(__ASSEMBLER__)
33
45#ifndef L4_INLINE
46#ifndef __cplusplus
47# ifdef __OPTIMIZE__
48# define L4_INLINE_STATIC static __inline__
49# define L4_INLINE_EXTERN extern __inline__
50# ifdef __GNUC_STDC_INLINE__
51# define L4_INLINE L4_INLINE_STATIC
52# else
53# define L4_INLINE L4_INLINE_EXTERN
54# endif
55# else /* ! __OPTIMIZE__ */
56# define L4_INLINE static
57# endif /* ! __OPTIMIZE__ */
58#else /* __cplusplus */
59# define L4_INLINE inline
60#endif /* __cplusplus */
61#elif defined DOXYGEN
62# define L4_INLINE inline
63#endif /* L4_INLINE */
64
69#define L4_ALWAYS_INLINE L4_INLINE __attribute__((__always_inline__))
70
71
72#define L4_DECLARE_CONSTRUCTOR(func, prio) \
73 static inline __attribute__((constructor(prio))) void func ## _ctor_func(void) { func(); }
74
75
173#ifndef __cplusplus
174# define L4_NOTHROW__A __attribute__((nothrow))
175# define L4_NOTHROW
176# define EXTERN_C_BEGIN
177# define EXTERN_C_END
178# define EXTERN_C
179# ifndef __BEGIN_DECLS
180# define __BEGIN_DECLS
181# endif
182# ifndef __END_DECLS
183# define __END_DECLS
184# endif
185# define L4_DEFAULT_PARAM(x)
186#else /* __cplusplus */
187# if __cplusplus >= 201103L
188# define L4_NOTHROW noexcept
189# else /* C++ < 11 */
190# define L4_NOTHROW throw()
191# endif
192# define EXTERN_C_BEGIN extern "C" {
193# define EXTERN_C_END }
194# define EXTERN_C extern "C"
195# if !defined __BEGIN_DECLS || defined DOXYGEN
196# define __BEGIN_DECLS extern "C" {
197# endif
198# if !defined __END_DECLS || defined DOXYGEN
199# define __END_DECLS }
200# endif
201# define L4_DEFAULT_PARAM(x) = x
202#endif /* __cplusplus */
203
208#define L4_NORETURN __attribute__((noreturn))
209
210#define L4_PURE __attribute__((pure))
211
216#define L4_NOINSTRUMENT __attribute__((no_instrument_function))
217#ifndef L4_HIDDEN
218# define L4_HIDDEN __attribute__((visibility("hidden")))
219#endif
220#if !defined L4_EXPORT || defined DOXYGEN
221# define L4_EXPORT __attribute__((visibility("default")))
222#endif
223#ifndef L4_EXPORT_TYPE
224# ifdef __cplusplus
225# define L4_EXPORT_TYPE __attribute__((visibility("default")))
226# else
227# define L4_EXPORT_TYPE
228# endif
229#endif
230#define L4_STRONG_ALIAS(name, aliasname) L4__STRONG_ALIAS(name, aliasname)
231#define L4__STRONG_ALIAS(name, aliasname) \
232 extern __typeof (name) aliasname __attribute__ ((alias (#name)));
233
241#if defined(ARCH_x86) || defined(ARCH_amd64) || \
242 defined(ARCH_arm) || defined(ARCH_arm64) || \
243 defined(ARCH_mips) || defined(ARCH_ppc32) || defined(ARCH_sparc)
244# define L4_STACK_ALIGN __BIGGEST_ALIGNMENT__
245#else
246# error Define L4_STACK_ALIGN for this target!
247#endif
248
266#if defined(ARCH_x86) || defined(ARCH_amd64)
267L4_INLINE unsigned long l4_align_stack_for_direct_fncall(unsigned long stack)
268{
269 if ((stack & (L4_STACK_ALIGN - 1)) == (L4_STACK_ALIGN - sizeof(unsigned long)))
270 return stack;
271 return (stack & ~(L4_STACK_ALIGN)) - sizeof(unsigned long);
272}
273#else
274L4_INLINE unsigned long l4_align_stack_for_direct_fncall(unsigned long stack)
275{
276 return stack & ~(L4_STACK_ALIGN);
277}
278#endif
279
280#endif /* !__ASSEMBLY__ */
281
282#include <l4/sys/linkage.h>
283
284#define L4_LIKELY(x) __builtin_expect((x),1)
285#define L4_UNLIKELY(x) __builtin_expect((x),0)
286
287/* Make sure that the function is not removed by optimization. Without the
288 * "used" attribute, unreferenced static functions are removed. */
289#define L4_STICKY(x) __attribute__((used)) x
290#define L4_DEPRECATED(s) __attribute__((deprecated(s)))
291
292#ifndef static_assert
293# if !defined(__cplusplus)
294# define static_assert(x, y) _Static_assert(x, y)
295# elif __cplusplus < 201103L
296# define static_assert(x, y) \
297 extern int l4_static_assert[-(!(x))] __attribute__((unused))
298# endif
299#endif
300
301#define L4_stringify_helper(x) #x
302#define L4_stringify(x) L4_stringify_helper(x)
303
304#ifndef __ASSEMBLER__
308L4_INLINE void l4_barrier(void);
309
313L4_INLINE void l4_mb(void);
314
318L4_INLINE void l4_wmb(void);
319
324
325
326/* Implementations */
328{
329 __asm__ __volatile__ ("" : : : "memory");
330}
331
332L4_INLINE void l4_mb(void)
333{
334 __asm__ __volatile__ ("" : : : "memory");
335}
336
338{
339 __asm__ __volatile__ ("" : : : "memory");
340}
341
343{
344 while (1)
345 l4_barrier();
346}
347#endif
348
351#endif /* !__L4_COMPILER_H__ */
void l4_wmb(void)
Write memory barrier.
Definition compiler.h:337
#define L4_INLINE
L4 Inline function attribute.
Definition compiler.h:62
void l4_barrier(void)
Memory barrier.
Definition compiler.h:327
void l4_mb(void)
Memory barrier.
Definition compiler.h:332
unsigned long l4_align_stack_for_direct_fncall(unsigned long stack)
Specify the desired alignment of the stack pointer.
Definition compiler.h:274
L4_NORETURN void l4_infinite_loop(void)
Infinite loop.
Definition compiler.h:342
#define L4_NORETURN
Noreturn function attribute.
Definition compiler.h:208