Subversion Repositories Kolibri OS

#ifndef __LINUX_COMPILER_H

#define __LINUX_COMPILER_H

#ifndef __ASSEMBLY__

#ifdef __CHECKER__

# define __user		__attribute__((noderef, address_space(1)))

# define __kernel	/* default address space */

# define __safe		__attribute__((safe))

# define __force	__attribute__((force))

# define __nocast	__attribute__((nocast))

# define __iomem	__attribute__((noderef, address_space(2)))

# define __acquires(x)	__attribute__((context(x,0,1)))

# define __releases(x)	__attribute__((context(x,1,0)))

# define __acquire(x)	__context__(x,1)

# define __release(x)	__context__(x,-1)

# define __cond_lock(x,c)	((c) ? ({ __acquire(x); 1; }) : 0)

extern void __chk_user_ptr(const volatile void __user *);

extern void __chk_io_ptr(const volatile void __iomem *);

#else

# define __user

# define __kernel

# define __safe

# define __force

# define __nocast

# define __iomem

# define __chk_user_ptr(x) (void)0

# define __chk_io_ptr(x) (void)0

# define __builtin_warning(x, y...) (1)

# define __acquires(x)

# define __releases(x)

# define __acquire(x) (void)0

# define __release(x) (void)0

# define __cond_lock(x,c) (c)

#endif

#ifdef __KERNEL__

#ifdef __GNUC__

#include 

#endif

#define notrace __attribute__((no_instrument_function))

/* Intel compiler defines __GNUC__. So we will overwrite implementations

 * coming from above header files here

 */

#ifdef __INTEL_COMPILER

# include 

#endif

/*

 * Generic compiler-dependent macros required for kernel

 * build go below this comment. Actual compiler/compiler version

 * specific implementations come from the above header files

 */

struct ftrace_branch_data {

	const char *func;

	const char *file;

	unsigned line;

	union {

		struct {

			unsigned long correct;

			unsigned long incorrect;

		};

		struct {

			unsigned long miss;

			unsigned long hit;

		};

		unsigned long miss_hit[2];

	};

};

/*

 * Note: DISABLE_BRANCH_PROFILING can be used by special lowlevel code

 * to disable branch tracing on a per file basis.

 */

#if defined(CONFIG_TRACE_BRANCH_PROFILING) \

    && !defined(DISABLE_BRANCH_PROFILING) && !defined(__CHECKER__)

void ftrace_likely_update(struct ftrace_branch_data *f, int val, int expect);

#define likely_notrace(x)	__builtin_expect(!!(x), 1)

#define unlikely_notrace(x)	__builtin_expect(!!(x), 0)

#define __branch_check__(x, expect) ({					\

			int ______r;					\

			static struct ftrace_branch_data		\

				__attribute__((__aligned__(4)))		\

				__attribute__((section("_ftrace_annotated_branch"))) \

				______f = {				\

				.func = __func__,			\

				.file = __FILE__,			\

				.line = __LINE__,			\

			};						\

			______r = likely_notrace(x);			\

			ftrace_likely_update(&______f, ______r, expect); \

			______r;					\

		})

/*

 * Using __builtin_constant_p(x) to ignore cases where the return

 * value is always the same.  This idea is taken from a similar patch

 * written by Daniel Walker.

 */

# ifndef likely

#  define likely(x)	(__builtin_constant_p(x) ? !!(x) : __branch_check__(x, 1))

# endif

# ifndef unlikely

#  define unlikely(x)	(__builtin_constant_p(x) ? !!(x) : __branch_check__(x, 0))

# endif

#ifdef CONFIG_PROFILE_ALL_BRANCHES

/*

 * "Define 'is'", Bill Clinton

 * "Define 'if'", Steven Rostedt

 */

#define if(cond, ...) __trace_if( (cond , ## __VA_ARGS__) )

#define __trace_if(cond) \

	if (__builtin_constant_p((cond)) ? !!(cond) :			\

	({								\

		int ______r;						\

		static struct ftrace_branch_data			\

			__attribute__((__aligned__(4)))			\

			__attribute__((section("_ftrace_branch")))	\

			______f = {					\

				.func = __func__,			\

				.file = __FILE__,			\

				.line = __LINE__,			\

			};						\

		______r = !!(cond);					\

		______f.miss_hit[______r]++;					\

		______r;						\

	}))

#endif /* CONFIG_PROFILE_ALL_BRANCHES */

#else

# define likely(x)	__builtin_expect(!!(x), 1)

# define unlikely(x)	__builtin_expect(!!(x), 0)

#endif

/* Optimization barrier */

#ifndef barrier

# define barrier() __memory_barrier()

#endif

/* Unreachable code */

#ifndef unreachable

# define unreachable() do { } while (1)

#endif

#ifndef RELOC_HIDE

# define RELOC_HIDE(ptr, off)					\

  ({ unsigned long __ptr;					\

     __ptr = (unsigned long) (ptr);				\

    (typeof(ptr)) (__ptr + (off)); })

#endif

#endif /* __KERNEL__ */

#endif /* __ASSEMBLY__ */

#ifdef __KERNEL__

/*

 * Allow us to mark functions as 'deprecated' and have gcc emit a nice

 * warning for each use, in hopes of speeding the functions removal.

 * Usage is:

 * 		int __deprecated foo(void)

 */

#ifndef __deprecated

# define __deprecated		/* unimplemented */

#endif

#ifdef MODULE

#define __deprecated_for_modules __deprecated

#else

#define __deprecated_for_modules

#endif

#ifndef __must_check

#define __must_check

#endif

#ifndef CONFIG_ENABLE_MUST_CHECK

#undef __must_check

#define __must_check

#endif

#ifndef CONFIG_ENABLE_WARN_DEPRECATED

#undef __deprecated

#undef __deprecated_for_modules

#define __deprecated

#define __deprecated_for_modules

#endif

/*

 * Allow us to avoid 'defined but not used' warnings on functions and data,

 * as well as force them to be emitted to the assembly file.

 *

 * As of gcc 3.4, static functions that are not marked with attribute((used))

 * may be elided from the assembly file.  As of gcc 3.4, static data not so

 * marked will not be elided, but this may change in a future gcc version.

 *

 * NOTE: Because distributions shipped with a backported unit-at-a-time

 * compiler in gcc 3.3, we must define __used to be __attribute__((used))

 * for gcc >=3.3 instead of 3.4.

 *

 * In prior versions of gcc, such functions and data would be emitted, but

 * would be warned about except with attribute((unused)).

 *

 * Mark functions that are referenced only in inline assembly as __used so

 * the code is emitted even though it appears to be unreferenced.

 */

#ifndef __used

# define __used			/* unimplemented */

#endif

#ifndef __maybe_unused

# define __maybe_unused		/* unimplemented */

#endif

#ifndef __always_unused

# define __always_unused	/* unimplemented */

#endif

#ifndef noinline

#define noinline

#endif

/*

 * Rather then using noinline to prevent stack consumption, use

 * noinline_for_stack instead.  For documentaiton reasons.

 */

#define noinline_for_stack noinline

#ifndef __always_inline

#define __always_inline inline

#endif

#endif /* __KERNEL__ */

/*

 * From the GCC manual:

 *

 * Many functions do not examine any values except their arguments,

 * and have no effects except the return value.  Basically this is

 * just slightly more strict class than the `pure' attribute above,

 * since function is not allowed to read global memory.

 *

 * Note that a function that has pointer arguments and examines the

 * data pointed to must _not_ be declared `const'.  Likewise, a

 * function that calls a non-`const' function usually must not be

 * `const'.  It does not make sense for a `const' function to return

 * `void'.

 */

#ifndef __attribute_const__

# define __attribute_const__	/* unimplemented */

#endif

/*

 * Tell gcc if a function is cold. The compiler will assume any path

 * directly leading to the call is unlikely.

 */

#ifndef __cold

#define __cold

#endif

/* Simple shorthand for a section definition */

#ifndef __section

# define __section(S) __attribute__ ((__section__(#S)))

#endif

/* Are two types/vars the same type (ignoring qualifiers)? */

#ifndef __same_type

# define __same_type(a, b) __builtin_types_compatible_p(typeof(a), typeof(b))

#endif

/* Compile time object size, -1 for unknown */

#ifndef __compiletime_object_size

# define __compiletime_object_size(obj) -1

#endif

#ifndef __compiletime_warning

# define __compiletime_warning(message)

#endif

#ifndef __compiletime_error

# define __compiletime_error(message)

#endif

/*

 * Prevent the compiler from merging or refetching accesses.  The compiler

 * is also forbidden from reordering successive instances of ACCESS_ONCE(),

 * but only when the compiler is aware of some particular ordering.  One way

 * to make the compiler aware of ordering is to put the two invocations of

 * ACCESS_ONCE() in different C statements.

 *

 * This macro does absolutely -nothing- to prevent the CPU from reordering,

 * merging, or refetching absolutely anything at any time.  Its main intended

 * use is to mediate communication between process-level code and irq/NMI

 * handlers, all running on the same CPU.

 */

#define ACCESS_ONCE(x) (*(volatile typeof(x) *)&(x))

#endif /* __LINUX_COMPILER_H */