Subversion Repositories Kolibri OS

#ifndef __LINUX_COMPILER_H

#error "Please don't include  directly, include  instead."

#endif

/*

 * Common definitions for all gcc versions go here.

 */

/* Optimization barrier */

/* The "volatile" is due to gcc bugs */

#define barrier() __asm__ __volatile__("": : :"memory")

/*

 * This macro obfuscates arithmetic on a variable address so that gcc

 * shouldn't recognize the original var, and make assumptions about it.

 *

 * This is needed because the C standard makes it undefined to do

 * pointer arithmetic on "objects" outside their boundaries and the

 * gcc optimizers assume this is the case. In particular they

 * assume such arithmetic does not wrap.

 *

 * A miscompilation has been observed because of this on PPC.

 * To work around it we hide the relationship of the pointer and the object

 * using this macro.

 *

 * Versions of the ppc64 compiler before 4.1 had a bug where use of

 * RELOC_HIDE could trash r30. The bug can be worked around by changing

 * the inline assembly constraint from =g to =r, in this particular

 * case either is valid.

 */

#define RELOC_HIDE(ptr, off)					\

  ({ unsigned long __ptr;					\

    __asm__ ("" : "=r"(__ptr) : "0"(ptr));		\

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

/* &a[0] degrades to a pointer: a different type from an array */

#define __must_be_array(a) BUILD_BUG_ON_ZERO(__same_type((a), &(a)[0]))

/*

 * Force always-inline if the user requests it so via the .config,

 * or if gcc is too old:

 */

#if !defined(CONFIG_ARCH_SUPPORTS_OPTIMIZED_INLINING) || \

    !defined(CONFIG_OPTIMIZE_INLINING) || (__GNUC__ < 4)

# define inline		inline		__attribute__((always_inline))

# define __inline__	__inline__	__attribute__((always_inline))

# define __inline	__inline	__attribute__((always_inline))

#endif

#define __deprecated			__attribute__((deprecated))

#define __packed			__attribute__((packed))

#define __weak				__attribute__((weak))

/*

 * it doesn't make sense on ARM (currently the only user of __naked) to trace

 * naked functions because then mcount is called without stack and frame pointer

 * being set up and there is no chance to restore the lr register to the value

 * before mcount was called.

 *

 * The asm() bodies of naked functions often depend on standard calling conventions,

 * therefore they must be noinline and noclone.  GCC 4.[56] currently fail to enforce

 * this, so we must do so ourselves.  See GCC PR44290.

 */

#define __naked				__attribute__((naked)) noinline __noclone notrace

#define __noreturn			__attribute__((noreturn))

/*

 * From the GCC manual:

 *

 * Many functions have no effects except the return value and their

 * return value depends only on the parameters and/or global

 * variables.  Such a function can be subject to common subexpression

 * elimination and loop optimization just as an arithmetic operator

 * would be.

 * [...]

 */

#define __pure				__attribute__((pure))

#define __aligned(x)			__attribute__((aligned(x)))

#define __printf(a,b)			__attribute__((format(printf,a,b)))

#define  noinline			__attribute__((noinline))

#define __attribute_const__		__attribute__((__const__))

#define __maybe_unused			__attribute__((unused))

#define __always_unused			__attribute__((unused))

#define __gcc_header(x) #x

#define _gcc_header(x) __gcc_header(linux/compiler-gcc##x.h)

#define gcc_header(x) _gcc_header(x)

#include gcc_header(__GNUC__)

#if !defined(__noclone)

#define __noclone	/* not needed */

#endif