compiler*.h: sync include/linux/compiler*.h with Linux 5.7-rc5
Copy these from Linux v5.7-rc5 tag. This brings in some handy new attributes and is otherwise important to keep in sync. We drop the reference to smp_read_barrier_depends() as it is not relevant on the architectures we support at this time, based on where it's implemented in Linux today. We drop the call to kasan_check_read() as that is not relevant to U-Boot as well. Cc: Masahiro Yamada <yamada.masahiro@socionext.com> Signed-off-by: Tom Rini <trini@konsulko.com>
This commit is contained in:
parent
8214791daa
commit
67f51b40ca
3
Kconfig
3
Kconfig
|
@ -71,6 +71,9 @@ config CC_COVERAGE
|
||||||
Enabling this option will pass "--coverage" to gcc to compile
|
Enabling this option will pass "--coverage" to gcc to compile
|
||||||
and link code instrumented for coverage analysis.
|
and link code instrumented for coverage analysis.
|
||||||
|
|
||||||
|
config CC_HAS_ASM_INLINE
|
||||||
|
def_bool $(success,echo 'void foo(void) { asm inline (""); }' | $(CC) -x c - -c -o /dev/null)
|
||||||
|
|
||||||
config DISTRO_DEFAULTS
|
config DISTRO_DEFAULTS
|
||||||
bool "Select defaults suitable for booting general purpose Linux distributions"
|
bool "Select defaults suitable for booting general purpose Linux distributions"
|
||||||
select AUTO_COMPLETE
|
select AUTO_COMPLETE
|
||||||
|
|
|
@ -1,12 +1,44 @@
|
||||||
#ifndef __LINUX_COMPILER_H
|
/* SPDX-License-Identifier: GPL-2.0 */
|
||||||
|
#ifndef __LINUX_COMPILER_TYPES_H
|
||||||
#error "Please don't include <linux/compiler-clang.h> directly, include <linux/compiler.h> instead."
|
#error "Please don't include <linux/compiler-clang.h> directly, include <linux/compiler.h> instead."
|
||||||
#endif
|
#endif
|
||||||
|
|
||||||
/* Some compiler specific definitions are overwritten here
|
/* Compiler specific definitions for Clang compiler */
|
||||||
* for Clang compiler
|
|
||||||
*/
|
|
||||||
|
|
||||||
#ifdef uninitialized_var
|
|
||||||
#undef uninitialized_var
|
|
||||||
#define uninitialized_var(x) x = *(&(x))
|
#define uninitialized_var(x) x = *(&(x))
|
||||||
|
|
||||||
|
/* same as gcc, this was present in clang-2.6 so we can assume it works
|
||||||
|
* with any version that can compile the kernel
|
||||||
|
*/
|
||||||
|
#define __UNIQUE_ID(prefix) __PASTE(__PASTE(__UNIQUE_ID_, prefix), __COUNTER__)
|
||||||
|
|
||||||
|
/* all clang versions usable with the kernel support KASAN ABI version 5 */
|
||||||
|
#define KASAN_ABI_VERSION 5
|
||||||
|
|
||||||
|
#if __has_feature(address_sanitizer) || __has_feature(hwaddress_sanitizer)
|
||||||
|
/* emulate gcc's __SANITIZE_ADDRESS__ flag */
|
||||||
|
#define __SANITIZE_ADDRESS__
|
||||||
|
#define __no_sanitize_address \
|
||||||
|
__attribute__((no_sanitize("address", "hwaddress")))
|
||||||
|
#else
|
||||||
|
#define __no_sanitize_address
|
||||||
#endif
|
#endif
|
||||||
|
|
||||||
|
/*
|
||||||
|
* Not all versions of clang implement the the type-generic versions
|
||||||
|
* of the builtin overflow checkers. Fortunately, clang implements
|
||||||
|
* __has_builtin allowing us to avoid awkward version
|
||||||
|
* checks. Unfortunately, we don't know which version of gcc clang
|
||||||
|
* pretends to be, so the macro may or may not be defined.
|
||||||
|
*/
|
||||||
|
#if __has_builtin(__builtin_mul_overflow) && \
|
||||||
|
__has_builtin(__builtin_add_overflow) && \
|
||||||
|
__has_builtin(__builtin_sub_overflow)
|
||||||
|
#define COMPILER_HAS_GENERIC_BUILTIN_OVERFLOW 1
|
||||||
|
#endif
|
||||||
|
|
||||||
|
/* The following are for compatibility with GCC, from compiler-gcc.h,
|
||||||
|
* and may be redefined here because they should not be shared with other
|
||||||
|
* compilers, like ICC.
|
||||||
|
*/
|
||||||
|
#define barrier() __asm__ __volatile__("" : : : "memory")
|
||||||
|
|
|
@ -1,4 +1,5 @@
|
||||||
#ifndef __LINUX_COMPILER_H
|
/* SPDX-License-Identifier: GPL-2.0 */
|
||||||
|
#ifndef __LINUX_COMPILER_TYPES_H
|
||||||
#error "Please don't include <linux/compiler-gcc.h> directly, include <linux/compiler.h> instead."
|
#error "Please don't include <linux/compiler-gcc.h> directly, include <linux/compiler.h> instead."
|
||||||
#endif
|
#endif
|
||||||
|
|
||||||
|
@ -9,11 +10,14 @@
|
||||||
+ __GNUC_MINOR__ * 100 \
|
+ __GNUC_MINOR__ * 100 \
|
||||||
+ __GNUC_PATCHLEVEL__)
|
+ __GNUC_PATCHLEVEL__)
|
||||||
|
|
||||||
|
#if GCC_VERSION < 40600
|
||||||
|
# error Sorry, your compiler is too old - please upgrade it.
|
||||||
|
#endif
|
||||||
|
|
||||||
/* Optimization barrier */
|
/* Optimization barrier */
|
||||||
|
|
||||||
/* The "volatile" is due to gcc bugs */
|
/* The "volatile" is due to gcc bugs */
|
||||||
#define barrier() \
|
#define barrier() __asm__ __volatile__("": : :"memory")
|
||||||
__asm__ __volatile__("": : :"memory")
|
|
||||||
/*
|
/*
|
||||||
* This version is i.e. to prevent dead stores elimination on @ptr
|
* This version is i.e. to prevent dead stores elimination on @ptr
|
||||||
* where gcc and llvm may behave differently when otherwise using
|
* where gcc and llvm may behave differently when otherwise using
|
||||||
|
@ -22,13 +26,12 @@
|
||||||
* clobbered. The issue is as follows: while the inline asm might
|
* clobbered. The issue is as follows: while the inline asm might
|
||||||
* access any memory it wants, the compiler could have fit all of
|
* access any memory it wants, the compiler could have fit all of
|
||||||
* @ptr into memory registers instead, and since @ptr never escaped
|
* @ptr into memory registers instead, and since @ptr never escaped
|
||||||
* from that, it proofed that the inline asm wasn't touching any of
|
* from that, it proved that the inline asm wasn't touching any of
|
||||||
* it. This version works well with both compilers, i.e. we're telling
|
* it. This version works well with both compilers, i.e. we're telling
|
||||||
* the compiler that the inline asm absolutely may see the contents
|
* the compiler that the inline asm absolutely may see the contents
|
||||||
* of @ptr. See also: https://llvm.org/bugs/show_bug.cgi?id=15495
|
* of @ptr. See also: https://llvm.org/bugs/show_bug.cgi?id=15495
|
||||||
*/
|
*/
|
||||||
#define barrier_data(ptr) \
|
#define barrier_data(ptr) __asm__ __volatile__("": :"r"(ptr) :"memory")
|
||||||
__asm__ __volatile__("": :"r"(ptr) :"memory")
|
|
||||||
|
|
||||||
/*
|
/*
|
||||||
* This macro obfuscates arithmetic on a variable address so that gcc
|
* This macro obfuscates arithmetic on a variable address so that gcc
|
||||||
|
@ -55,181 +58,54 @@
|
||||||
(typeof(ptr)) (__ptr + (off)); \
|
(typeof(ptr)) (__ptr + (off)); \
|
||||||
})
|
})
|
||||||
|
|
||||||
/* Make the optimizer believe the variable can be manipulated arbitrarily. */
|
|
||||||
#define OPTIMIZER_HIDE_VAR(var) \
|
|
||||||
__asm__ ("" : "=r" (var) : "0" (var))
|
|
||||||
|
|
||||||
#ifdef __CHECKER__
|
|
||||||
#define __must_be_array(a) 0
|
|
||||||
#else
|
|
||||||
/* &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]))
|
|
||||||
#endif
|
|
||||||
|
|
||||||
/*
|
/*
|
||||||
* Force always-inline if the user requests it so via the .config,
|
* A trick to suppress uninitialized variable warning without generating any
|
||||||
* or if gcc is too old:
|
* code
|
||||||
*/
|
*/
|
||||||
#if !defined(CONFIG_ARCH_SUPPORTS_OPTIMIZED_INLINING) || \
|
#define uninitialized_var(x) x = x
|
||||||
!defined(CONFIG_OPTIMIZE_INLINING) || (__GNUC__ < 4)
|
|
||||||
#define inline inline __attribute__((always_inline)) notrace
|
#ifdef CONFIG_RETPOLINE
|
||||||
#define __inline__ __inline__ __attribute__((always_inline)) notrace
|
#define __noretpoline __attribute__((__indirect_branch__("keep")))
|
||||||
#define __inline __inline __attribute__((always_inline)) notrace
|
|
||||||
#else
|
|
||||||
/* A lot of inline functions can cause havoc with function tracing */
|
|
||||||
#define inline inline notrace
|
|
||||||
#define __inline__ __inline__ notrace
|
|
||||||
#define __inline __inline notrace
|
|
||||||
#endif
|
#endif
|
||||||
|
|
||||||
#define __always_inline inline __attribute__((always_inline))
|
|
||||||
#define noinline __attribute__((noinline))
|
|
||||||
|
|
||||||
#define __deprecated __attribute__((deprecated))
|
|
||||||
#define __packed __attribute__((packed))
|
|
||||||
#define __weak __attribute__((weak))
|
|
||||||
#define __alias(symbol) __attribute__((alias(#symbol)))
|
|
||||||
|
|
||||||
/*
|
|
||||||
* 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 __scanf(a, b) __attribute__((format(scanf, a, b)))
|
|
||||||
#define __attribute_const__ __attribute__((__const__))
|
|
||||||
#define __maybe_unused __attribute__((unused))
|
|
||||||
#define __always_unused __attribute__((unused))
|
|
||||||
|
|
||||||
/* gcc version specific checks */
|
|
||||||
|
|
||||||
#if GCC_VERSION < 30200
|
|
||||||
# error Sorry, your compiler is too old - please upgrade it.
|
|
||||||
#endif
|
|
||||||
|
|
||||||
#if GCC_VERSION < 30300
|
|
||||||
# define __used __attribute__((__unused__))
|
|
||||||
#else
|
|
||||||
# define __used __attribute__((__used__))
|
|
||||||
#endif
|
|
||||||
|
|
||||||
#ifdef CONFIG_GCOV_KERNEL
|
|
||||||
# if GCC_VERSION < 30400
|
|
||||||
# error "GCOV profiling support for gcc versions below 3.4 not included"
|
|
||||||
# endif /* __GNUC_MINOR__ */
|
|
||||||
#endif /* CONFIG_GCOV_KERNEL */
|
|
||||||
|
|
||||||
#if GCC_VERSION >= 30400
|
|
||||||
#define __must_check __attribute__((warn_unused_result))
|
|
||||||
#endif
|
|
||||||
|
|
||||||
#if GCC_VERSION >= 40000
|
|
||||||
|
|
||||||
/* GCC 4.1.[01] miscompiles __weak */
|
|
||||||
#ifdef __KERNEL__
|
|
||||||
# if GCC_VERSION >= 40100 && GCC_VERSION <= 40101
|
|
||||||
# error Your version of gcc miscompiles the __weak directive
|
|
||||||
# endif
|
|
||||||
#endif
|
|
||||||
|
|
||||||
#define __used __attribute__((__used__))
|
|
||||||
#define __compiler_offsetof(a, b) \
|
|
||||||
__builtin_offsetof(a, b)
|
|
||||||
|
|
||||||
#if GCC_VERSION >= 40100 && GCC_VERSION < 40600
|
|
||||||
# define __compiletime_object_size(obj) __builtin_object_size(obj, 0)
|
|
||||||
#endif
|
|
||||||
|
|
||||||
#if GCC_VERSION >= 40300
|
|
||||||
/* Mark functions as cold. gcc will assume any path leading to a call
|
|
||||||
* to them will be unlikely. This means a lot of manual unlikely()s
|
|
||||||
* are unnecessary now for any paths leading to the usual suspects
|
|
||||||
* like BUG(), printk(), panic() etc. [but let's keep them for now for
|
|
||||||
* older compilers]
|
|
||||||
*
|
|
||||||
* Early snapshots of gcc 4.3 don't support this and we can't detect this
|
|
||||||
* in the preprocessor, but we can live with this because they're unreleased.
|
|
||||||
* Maketime probing would be overkill here.
|
|
||||||
*
|
|
||||||
* gcc also has a __attribute__((__hot__)) to move hot functions into
|
|
||||||
* a special section, but I don't see any sense in this right now in
|
|
||||||
* the kernel context
|
|
||||||
*/
|
|
||||||
#define __cold __attribute__((__cold__))
|
|
||||||
|
|
||||||
#define __UNIQUE_ID(prefix) __PASTE(__PASTE(__UNIQUE_ID_, prefix), __COUNTER__)
|
#define __UNIQUE_ID(prefix) __PASTE(__PASTE(__UNIQUE_ID_, prefix), __COUNTER__)
|
||||||
|
|
||||||
#ifndef __CHECKER__
|
#define __compiletime_object_size(obj) __builtin_object_size(obj, 0)
|
||||||
# define __compiletime_warning(message) __attribute__((warning(message)))
|
|
||||||
# define __compiletime_error(message) __attribute__((error(message)))
|
#define __compiletime_warning(message) __attribute__((__warning__(message)))
|
||||||
#endif /* __CHECKER__ */
|
#define __compiletime_error(message) __attribute__((__error__(message)))
|
||||||
#endif /* GCC_VERSION >= 40300 */
|
|
||||||
|
#if defined(LATENT_ENTROPY_PLUGIN) && !defined(__CHECKER__)
|
||||||
|
#define __latent_entropy __attribute__((latent_entropy))
|
||||||
|
#endif
|
||||||
|
|
||||||
|
/*
|
||||||
|
* calling noreturn functions, __builtin_unreachable() and __builtin_trap()
|
||||||
|
* confuse the stack allocation in gcc, leading to overly large stack
|
||||||
|
* frames, see https://gcc.gnu.org/bugzilla/show_bug.cgi?id=82365
|
||||||
|
*
|
||||||
|
* Adding an empty inline assembly before it works around the problem
|
||||||
|
*/
|
||||||
|
#define barrier_before_unreachable() asm volatile("")
|
||||||
|
|
||||||
#if GCC_VERSION >= 40500
|
|
||||||
/*
|
/*
|
||||||
* Mark a position in code as unreachable. This can be used to
|
* Mark a position in code as unreachable. This can be used to
|
||||||
* suppress control flow warnings after asm blocks that transfer
|
* suppress control flow warnings after asm blocks that transfer
|
||||||
* control elsewhere.
|
* control elsewhere.
|
||||||
*
|
|
||||||
* Early snapshots of gcc 4.5 don't support this and we can't detect
|
|
||||||
* this in the preprocessor, but we can live with this because they're
|
|
||||||
* unreleased. Really, we need to have autoconf for the kernel.
|
|
||||||
*/
|
*/
|
||||||
#define unreachable() __builtin_unreachable()
|
#define unreachable() \
|
||||||
|
do { \
|
||||||
|
annotate_unreachable(); \
|
||||||
|
barrier_before_unreachable(); \
|
||||||
|
__builtin_unreachable(); \
|
||||||
|
} while (0)
|
||||||
|
|
||||||
/* Mark a function definition as prohibited from being cloned. */
|
#if defined(RANDSTRUCT_PLUGIN) && !defined(__CHECKER__)
|
||||||
#define __noclone __attribute__((__noclone__))
|
#define __randomize_layout __attribute__((randomize_layout))
|
||||||
|
#define __no_randomize_layout __attribute__((no_randomize_layout))
|
||||||
#endif /* GCC_VERSION >= 40500 */
|
/* This anon struct can add padding, so only enable it under randstruct. */
|
||||||
|
#define randomized_struct_fields_start struct {
|
||||||
#if GCC_VERSION >= 40600
|
#define randomized_struct_fields_end } __randomize_layout;
|
||||||
/*
|
|
||||||
* When used with Link Time Optimization, gcc can optimize away C functions or
|
|
||||||
* variables which are referenced only from assembly code. __visible tells the
|
|
||||||
* optimizer that something else uses this function or variable, thus preventing
|
|
||||||
* this.
|
|
||||||
*/
|
|
||||||
#define __visible __attribute__((externally_visible))
|
|
||||||
#endif
|
|
||||||
|
|
||||||
|
|
||||||
#if GCC_VERSION >= 40900 && !defined(__CHECKER__)
|
|
||||||
/*
|
|
||||||
* __assume_aligned(n, k): Tell the optimizer that the returned
|
|
||||||
* pointer can be assumed to be k modulo n. The second argument is
|
|
||||||
* optional (default 0), so we use a variadic macro to make the
|
|
||||||
* shorthand.
|
|
||||||
*
|
|
||||||
* Beware: Do not apply this to functions which may return
|
|
||||||
* ERR_PTRs. Also, it is probably unwise to apply it to functions
|
|
||||||
* returning extra information in the low bits (but in that case the
|
|
||||||
* compiler should see some alignment anyway, when the return value is
|
|
||||||
* massaged by 'flags = ptr & 3; ptr &= ~3;').
|
|
||||||
*/
|
|
||||||
#define __assume_aligned(a, ...) __attribute__((__assume_aligned__(a, ## __VA_ARGS__)))
|
|
||||||
#endif
|
#endif
|
||||||
|
|
||||||
/*
|
/*
|
||||||
|
@ -243,43 +119,56 @@
|
||||||
*/
|
*/
|
||||||
#define asm_volatile_goto(x...) do { asm goto(x); asm (""); } while (0)
|
#define asm_volatile_goto(x...) do { asm goto(x); asm (""); } while (0)
|
||||||
|
|
||||||
#ifdef CONFIG_ARCH_USE_BUILTIN_BSWAP
|
/*
|
||||||
#if GCC_VERSION >= 40400
|
* sparse (__CHECKER__) pretends to be gcc, but can't do constant
|
||||||
|
* folding in __builtin_bswap*() (yet), so don't set these for it.
|
||||||
|
*/
|
||||||
|
#if defined(CONFIG_ARCH_USE_BUILTIN_BSWAP) && !defined(__CHECKER__)
|
||||||
#define __HAVE_BUILTIN_BSWAP32__
|
#define __HAVE_BUILTIN_BSWAP32__
|
||||||
#define __HAVE_BUILTIN_BSWAP64__
|
#define __HAVE_BUILTIN_BSWAP64__
|
||||||
#endif
|
#if GCC_VERSION >= 40800
|
||||||
#if GCC_VERSION >= 40800 || (defined(__powerpc__) && GCC_VERSION >= 40600)
|
|
||||||
#define __HAVE_BUILTIN_BSWAP16__
|
#define __HAVE_BUILTIN_BSWAP16__
|
||||||
#endif
|
#endif
|
||||||
#endif /* CONFIG_ARCH_USE_BUILTIN_BSWAP */
|
#endif /* CONFIG_ARCH_USE_BUILTIN_BSWAP && !__CHECKER__ */
|
||||||
|
|
||||||
#if GCC_VERSION >= 50000
|
#if GCC_VERSION >= 70000
|
||||||
|
#define KASAN_ABI_VERSION 5
|
||||||
|
#elif GCC_VERSION >= 50000
|
||||||
#define KASAN_ABI_VERSION 4
|
#define KASAN_ABI_VERSION 4
|
||||||
#elif GCC_VERSION >= 40902
|
#elif GCC_VERSION >= 40902
|
||||||
#define KASAN_ABI_VERSION 3
|
#define KASAN_ABI_VERSION 3
|
||||||
#endif
|
#endif
|
||||||
|
|
||||||
#if GCC_VERSION >= 40902
|
#if __has_attribute(__no_sanitize_address__)
|
||||||
/*
|
|
||||||
* Tell the compiler that address safety instrumentation (KASAN)
|
|
||||||
* should not be applied to that function.
|
|
||||||
* Conflicts with inlining: https://gcc.gnu.org/bugzilla/show_bug.cgi?id=67368
|
|
||||||
*/
|
|
||||||
#define __no_sanitize_address __attribute__((no_sanitize_address))
|
#define __no_sanitize_address __attribute__((no_sanitize_address))
|
||||||
#endif
|
#else
|
||||||
|
|
||||||
#endif /* gcc version >= 40000 specific checks */
|
|
||||||
|
|
||||||
#if !defined(__noclone)
|
|
||||||
#define __noclone /* not needed */
|
|
||||||
#endif
|
|
||||||
|
|
||||||
#if !defined(__no_sanitize_address)
|
|
||||||
#define __no_sanitize_address
|
#define __no_sanitize_address
|
||||||
#endif
|
#endif
|
||||||
|
|
||||||
|
#if GCC_VERSION >= 50100
|
||||||
|
#define COMPILER_HAS_GENERIC_BUILTIN_OVERFLOW 1
|
||||||
|
#endif
|
||||||
|
|
||||||
/*
|
/*
|
||||||
* A trick to suppress uninitialized variable warning without generating any
|
* Turn individual warnings and errors on and off locally, depending
|
||||||
* code
|
* on version.
|
||||||
*/
|
*/
|
||||||
#define uninitialized_var(x) x = x
|
#define __diag_GCC(version, severity, s) \
|
||||||
|
__diag_GCC_ ## version(__diag_GCC_ ## severity s)
|
||||||
|
|
||||||
|
/* Severity used in pragma directives */
|
||||||
|
#define __diag_GCC_ignore ignored
|
||||||
|
#define __diag_GCC_warn warning
|
||||||
|
#define __diag_GCC_error error
|
||||||
|
|
||||||
|
#define __diag_str1(s) #s
|
||||||
|
#define __diag_str(s) __diag_str1(s)
|
||||||
|
#define __diag(s) _Pragma(__diag_str(GCC diagnostic s))
|
||||||
|
|
||||||
|
#if GCC_VERSION >= 80000
|
||||||
|
#define __diag_GCC_8(s) __diag(s)
|
||||||
|
#else
|
||||||
|
#define __diag_GCC_8(s)
|
||||||
|
#endif
|
||||||
|
|
||||||
|
#define __no_fgcse __attribute__((optimize("-fno-gcse")))
|
||||||
|
|
|
@ -1,22 +1,17 @@
|
||||||
#ifndef __LINUX_COMPILER_H
|
/* SPDX-License-Identifier: GPL-2.0 */
|
||||||
|
#ifndef __LINUX_COMPILER_TYPES_H
|
||||||
#error "Please don't include <linux/compiler-intel.h> directly, include <linux/compiler.h> instead."
|
#error "Please don't include <linux/compiler-intel.h> directly, include <linux/compiler.h> instead."
|
||||||
#endif
|
#endif
|
||||||
|
|
||||||
#ifdef __ECC
|
#ifdef __ECC
|
||||||
|
|
||||||
/* Some compiler specific definitions are overwritten here
|
/* Compiler specific definitions for Intel ECC compiler */
|
||||||
* for Intel ECC compiler
|
|
||||||
*/
|
|
||||||
|
|
||||||
#include <asm/intrinsics.h>
|
#include <asm/intrinsics.h>
|
||||||
|
|
||||||
/* Intel ECC compiler doesn't support gcc specific asm stmts.
|
/* Intel ECC compiler doesn't support gcc specific asm stmts.
|
||||||
* It uses intrinsics to do the equivalent things.
|
* It uses intrinsics to do the equivalent things.
|
||||||
*/
|
*/
|
||||||
#undef barrier
|
|
||||||
#undef barrier_data
|
|
||||||
#undef RELOC_HIDE
|
|
||||||
#undef OPTIMIZER_HIDE_VAR
|
|
||||||
|
|
||||||
#define barrier() __memory_barrier()
|
#define barrier() __memory_barrier()
|
||||||
#define barrier_data(ptr) barrier()
|
#define barrier_data(ptr) barrier()
|
||||||
|
@ -32,14 +27,8 @@
|
||||||
*/
|
*/
|
||||||
#define OPTIMIZER_HIDE_VAR(var) barrier()
|
#define OPTIMIZER_HIDE_VAR(var) barrier()
|
||||||
|
|
||||||
/* Intel ECC compiler doesn't support __builtin_types_compatible_p() */
|
|
||||||
#define __must_be_array(a) 0
|
|
||||||
|
|
||||||
#endif
|
#endif
|
||||||
|
|
||||||
#ifndef __HAVE_BUILTIN_BSWAP16__
|
|
||||||
/* icc has this, but it's called _bswap16 */
|
/* icc has this, but it's called _bswap16 */
|
||||||
#define __HAVE_BUILTIN_BSWAP16__
|
#define __HAVE_BUILTIN_BSWAP16__
|
||||||
#define __builtin_bswap16 _bswap16
|
#define __builtin_bswap16 _bswap16
|
||||||
#endif
|
|
||||||
|
|
||||||
|
|
|
@ -1,127 +1,38 @@
|
||||||
|
/* SPDX-License-Identifier: GPL-2.0 */
|
||||||
#ifndef __LINUX_COMPILER_H
|
#ifndef __LINUX_COMPILER_H
|
||||||
#define __LINUX_COMPILER_H
|
#define __LINUX_COMPILER_H
|
||||||
|
|
||||||
|
#include <linux/compiler_types.h>
|
||||||
|
|
||||||
#ifndef __ASSEMBLY__
|
#ifndef __ASSEMBLY__
|
||||||
|
|
||||||
#ifdef __CHECKER__
|
|
||||||
# define __user __attribute__((noderef, address_space(1)))
|
|
||||||
# define __kernel __attribute__((address_space(0)))
|
|
||||||
# define __safe __attribute__((safe))
|
|
||||||
# define __force __attribute__((force))
|
|
||||||
# define __nocast __attribute__((nocast))
|
|
||||||
# define __iomem __attribute__((noderef, address_space(2)))
|
|
||||||
# define __must_hold(x) __attribute__((context(x,1,1)))
|
|
||||||
# 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)
|
|
||||||
# define __percpu __attribute__((noderef, address_space(3)))
|
|
||||||
# define __pmem __attribute__((noderef, address_space(5)))
|
|
||||||
#ifdef CONFIG_SPARSE_RCU_POINTER
|
|
||||||
# define __rcu __attribute__((noderef, address_space(4)))
|
|
||||||
#else
|
|
||||||
# define __rcu
|
|
||||||
#endif
|
|
||||||
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 __must_hold(x)
|
|
||||||
# define __acquires(x)
|
|
||||||
# define __releases(x)
|
|
||||||
# define __acquire(x) (void)0
|
|
||||||
# define __release(x) (void)0
|
|
||||||
# define __cond_lock(x,c) (c)
|
|
||||||
# define __percpu
|
|
||||||
# define __rcu
|
|
||||||
# define __pmem
|
|
||||||
#endif
|
|
||||||
|
|
||||||
/* Indirect macros required for expanded argument pasting, eg. __LINE__. */
|
|
||||||
#define ___PASTE(a,b) a##b
|
|
||||||
#define __PASTE(a,b) ___PASTE(a,b)
|
|
||||||
|
|
||||||
#ifdef __KERNEL__
|
#ifdef __KERNEL__
|
||||||
|
|
||||||
#ifdef __GNUC__
|
|
||||||
#include <linux/compiler-gcc.h>
|
|
||||||
#endif
|
|
||||||
|
|
||||||
#if defined(CC_USING_HOTPATCH) && !defined(__CHECKER__)
|
|
||||||
#define notrace __attribute__((hotpatch(0,0)))
|
|
||||||
#else
|
|
||||||
#define notrace __attribute__((no_instrument_function))
|
|
||||||
#endif
|
|
||||||
|
|
||||||
/* Intel compiler defines __GNUC__. So we will overwrite implementations
|
|
||||||
* coming from above header files here
|
|
||||||
*/
|
|
||||||
#ifdef __INTEL_COMPILER
|
|
||||||
# include <linux/compiler-intel.h>
|
|
||||||
#endif
|
|
||||||
|
|
||||||
/* Clang compiler defines __GNUC__. So we will overwrite implementations
|
|
||||||
* coming from above header files here
|
|
||||||
*/
|
|
||||||
#ifdef __clang__
|
|
||||||
#include <linux/compiler-clang.h>
|
|
||||||
#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
|
* Note: DISABLE_BRANCH_PROFILING can be used by special lowlevel code
|
||||||
* to disable branch tracing on a per file basis.
|
* to disable branch tracing on a per file basis.
|
||||||
*/
|
*/
|
||||||
#if defined(CONFIG_TRACE_BRANCH_PROFILING) \
|
#if defined(CONFIG_TRACE_BRANCH_PROFILING) \
|
||||||
&& !defined(DISABLE_BRANCH_PROFILING) && !defined(__CHECKER__)
|
&& !defined(DISABLE_BRANCH_PROFILING) && !defined(__CHECKER__)
|
||||||
void ftrace_likely_update(struct ftrace_branch_data *f, int val, int expect);
|
void ftrace_likely_update(struct ftrace_likely_data *f, int val,
|
||||||
|
int expect, int is_constant);
|
||||||
|
|
||||||
#define likely_notrace(x) __builtin_expect(!!(x), 1)
|
#define likely_notrace(x) __builtin_expect(!!(x), 1)
|
||||||
#define unlikely_notrace(x) __builtin_expect(!!(x), 0)
|
#define unlikely_notrace(x) __builtin_expect(!!(x), 0)
|
||||||
|
|
||||||
#define __branch_check__(x, expect) ({ \
|
#define __branch_check__(x, expect, is_constant) ({ \
|
||||||
int ______r; \
|
long ______r; \
|
||||||
static struct ftrace_branch_data \
|
static struct ftrace_likely_data \
|
||||||
__attribute__((__aligned__(4))) \
|
__aligned(4) \
|
||||||
__attribute__((section("_ftrace_annotated_branch"))) \
|
__section(_ftrace_annotated_branch) \
|
||||||
______f = { \
|
______f = { \
|
||||||
.func = __func__, \
|
.data.func = __func__, \
|
||||||
.file = __FILE__, \
|
.data.file = __FILE__, \
|
||||||
.line = __LINE__, \
|
.data.line = __LINE__, \
|
||||||
}; \
|
}; \
|
||||||
______r = likely_notrace(x); \
|
______r = __builtin_expect(!!(x), expect); \
|
||||||
ftrace_likely_update(&______f, ______r, expect); \
|
ftrace_likely_update(&______f, ______r, \
|
||||||
|
expect, is_constant); \
|
||||||
______r; \
|
______r; \
|
||||||
})
|
})
|
||||||
|
|
||||||
|
@ -131,10 +42,10 @@ void ftrace_likely_update(struct ftrace_branch_data *f, int val, int expect);
|
||||||
* written by Daniel Walker.
|
* written by Daniel Walker.
|
||||||
*/
|
*/
|
||||||
# ifndef likely
|
# ifndef likely
|
||||||
# define likely(x) (__builtin_constant_p(x) ? !!(x) : __branch_check__(x, 1))
|
# define likely(x) (__branch_check__(x, 1, __builtin_constant_p(x)))
|
||||||
# endif
|
# endif
|
||||||
# ifndef unlikely
|
# ifndef unlikely
|
||||||
# define unlikely(x) (__builtin_constant_p(x) ? !!(x) : __branch_check__(x, 0))
|
# define unlikely(x) (__branch_check__(x, 0, __builtin_constant_p(x)))
|
||||||
# endif
|
# endif
|
||||||
|
|
||||||
#ifdef CONFIG_PROFILE_ALL_BRANCHES
|
#ifdef CONFIG_PROFILE_ALL_BRANCHES
|
||||||
|
@ -142,23 +53,24 @@ void ftrace_likely_update(struct ftrace_branch_data *f, int val, int expect);
|
||||||
* "Define 'is'", Bill Clinton
|
* "Define 'is'", Bill Clinton
|
||||||
* "Define 'if'", Steven Rostedt
|
* "Define 'if'", Steven Rostedt
|
||||||
*/
|
*/
|
||||||
#define if(cond, ...) __trace_if( (cond , ## __VA_ARGS__) )
|
#define if(cond, ...) if ( __trace_if_var( !!(cond , ## __VA_ARGS__) ) )
|
||||||
#define __trace_if(cond) \
|
|
||||||
if (__builtin_constant_p(!!(cond)) ? !!(cond) : \
|
#define __trace_if_var(cond) (__builtin_constant_p(cond) ? (cond) : __trace_if_value(cond))
|
||||||
({ \
|
|
||||||
int ______r; \
|
#define __trace_if_value(cond) ({ \
|
||||||
static struct ftrace_branch_data \
|
static struct ftrace_branch_data \
|
||||||
__attribute__((__aligned__(4))) \
|
__aligned(4) \
|
||||||
__attribute__((section("_ftrace_branch"))) \
|
__section(_ftrace_branch) \
|
||||||
______f = { \
|
__if_trace = { \
|
||||||
.func = __func__, \
|
.func = __func__, \
|
||||||
.file = __FILE__, \
|
.file = __FILE__, \
|
||||||
.line = __LINE__, \
|
.line = __LINE__, \
|
||||||
}; \
|
}; \
|
||||||
______r = !!(cond); \
|
(cond) ? \
|
||||||
______f.miss_hit[______r]++; \
|
(__if_trace.miss_hit[1]++,1) : \
|
||||||
______r; \
|
(__if_trace.miss_hit[0]++,0); \
|
||||||
}))
|
})
|
||||||
|
|
||||||
#endif /* CONFIG_PROFILE_ALL_BRANCHES */
|
#endif /* CONFIG_PROFILE_ALL_BRANCHES */
|
||||||
|
|
||||||
#else
|
#else
|
||||||
|
@ -175,9 +87,76 @@ void ftrace_likely_update(struct ftrace_branch_data *f, int val, int expect);
|
||||||
# define barrier_data(ptr) barrier()
|
# define barrier_data(ptr) barrier()
|
||||||
#endif
|
#endif
|
||||||
|
|
||||||
|
/* workaround for GCC PR82365 if needed */
|
||||||
|
#ifndef barrier_before_unreachable
|
||||||
|
# define barrier_before_unreachable() do { } while (0)
|
||||||
|
#endif
|
||||||
|
|
||||||
/* Unreachable code */
|
/* Unreachable code */
|
||||||
|
#ifdef CONFIG_STACK_VALIDATION
|
||||||
|
/*
|
||||||
|
* These macros help objtool understand GCC code flow for unreachable code.
|
||||||
|
* The __COUNTER__ based labels are a hack to make each instance of the macros
|
||||||
|
* unique, to convince GCC not to merge duplicate inline asm statements.
|
||||||
|
*/
|
||||||
|
#define annotate_reachable() ({ \
|
||||||
|
asm volatile("%c0:\n\t" \
|
||||||
|
".pushsection .discard.reachable\n\t" \
|
||||||
|
".long %c0b - .\n\t" \
|
||||||
|
".popsection\n\t" : : "i" (__COUNTER__)); \
|
||||||
|
})
|
||||||
|
#define annotate_unreachable() ({ \
|
||||||
|
asm volatile("%c0:\n\t" \
|
||||||
|
".pushsection .discard.unreachable\n\t" \
|
||||||
|
".long %c0b - .\n\t" \
|
||||||
|
".popsection\n\t" : : "i" (__COUNTER__)); \
|
||||||
|
})
|
||||||
|
#define ASM_UNREACHABLE \
|
||||||
|
"999:\n\t" \
|
||||||
|
".pushsection .discard.unreachable\n\t" \
|
||||||
|
".long 999b - .\n\t" \
|
||||||
|
".popsection\n\t"
|
||||||
|
|
||||||
|
/* Annotate a C jump table to allow objtool to follow the code flow */
|
||||||
|
#define __annotate_jump_table __section(.rodata..c_jump_table)
|
||||||
|
|
||||||
|
#else
|
||||||
|
#define annotate_reachable()
|
||||||
|
#define annotate_unreachable()
|
||||||
|
#define __annotate_jump_table
|
||||||
|
#endif
|
||||||
|
|
||||||
|
#ifndef ASM_UNREACHABLE
|
||||||
|
# define ASM_UNREACHABLE
|
||||||
|
#endif
|
||||||
#ifndef unreachable
|
#ifndef unreachable
|
||||||
# define unreachable() do { } while (1)
|
# define unreachable() do { \
|
||||||
|
annotate_unreachable(); \
|
||||||
|
__builtin_unreachable(); \
|
||||||
|
} while (0)
|
||||||
|
#endif
|
||||||
|
|
||||||
|
/*
|
||||||
|
* KENTRY - kernel entry point
|
||||||
|
* This can be used to annotate symbols (functions or data) that are used
|
||||||
|
* without their linker symbol being referenced explicitly. For example,
|
||||||
|
* interrupt vector handlers, or functions in the kernel image that are found
|
||||||
|
* programatically.
|
||||||
|
*
|
||||||
|
* Not required for symbols exported with EXPORT_SYMBOL, or initcalls. Those
|
||||||
|
* are handled in their own way (with KEEP() in linker scripts).
|
||||||
|
*
|
||||||
|
* KENTRY can be avoided if the symbols in question are marked as KEEP() in the
|
||||||
|
* linker script. For example an architecture could KEEP() its entire
|
||||||
|
* boot/exception vector code rather than annotate each function and data.
|
||||||
|
*/
|
||||||
|
#ifndef KENTRY
|
||||||
|
# define KENTRY(sym) \
|
||||||
|
extern typeof(sym) sym; \
|
||||||
|
static const unsigned long __kentry_##sym \
|
||||||
|
__used \
|
||||||
|
__section("___kentry" "+" #sym ) \
|
||||||
|
= (unsigned long)&sym;
|
||||||
#endif
|
#endif
|
||||||
|
|
||||||
#ifndef RELOC_HIDE
|
#ifndef RELOC_HIDE
|
||||||
|
@ -188,7 +167,9 @@ void ftrace_likely_update(struct ftrace_branch_data *f, int val, int expect);
|
||||||
#endif
|
#endif
|
||||||
|
|
||||||
#ifndef OPTIMIZER_HIDE_VAR
|
#ifndef OPTIMIZER_HIDE_VAR
|
||||||
#define OPTIMIZER_HIDE_VAR(var) barrier()
|
/* Make the optimizer believe the variable can be manipulated arbitrarily. */
|
||||||
|
#define OPTIMIZER_HIDE_VAR(var) \
|
||||||
|
__asm__ ("" : "=r" (var) : "0" (var))
|
||||||
#endif
|
#endif
|
||||||
|
|
||||||
/* Not-quite-unique ID. */
|
/* Not-quite-unique ID. */
|
||||||
|
@ -220,23 +201,21 @@ void __read_once_size(const volatile void *p, void *res, int size)
|
||||||
|
|
||||||
#ifdef CONFIG_KASAN
|
#ifdef CONFIG_KASAN
|
||||||
/*
|
/*
|
||||||
* This function is not 'inline' because __no_sanitize_address confilcts
|
* We can't declare function 'inline' because __no_sanitize_address confilcts
|
||||||
* with inlining. Attempt to inline it may cause a build failure.
|
* with inlining. Attempt to inline it may cause a build failure.
|
||||||
* https://gcc.gnu.org/bugzilla/show_bug.cgi?id=67368
|
* https://gcc.gnu.org/bugzilla/show_bug.cgi?id=67368
|
||||||
* '__maybe_unused' allows us to avoid defined-but-not-used warnings.
|
* '__maybe_unused' allows us to avoid defined-but-not-used warnings.
|
||||||
*/
|
*/
|
||||||
static __no_sanitize_address __maybe_unused
|
# define __no_kasan_or_inline __no_sanitize_address notrace __maybe_unused
|
||||||
void __read_once_size_nocheck(const volatile void *p, void *res, int size)
|
|
||||||
{
|
|
||||||
__READ_ONCE_SIZE;
|
|
||||||
}
|
|
||||||
#else
|
#else
|
||||||
static __always_inline
|
# define __no_kasan_or_inline __always_inline
|
||||||
|
#endif
|
||||||
|
|
||||||
|
static __no_kasan_or_inline
|
||||||
void __read_once_size_nocheck(const volatile void *p, void *res, int size)
|
void __read_once_size_nocheck(const volatile void *p, void *res, int size)
|
||||||
{
|
{
|
||||||
__READ_ONCE_SIZE;
|
__READ_ONCE_SIZE;
|
||||||
}
|
}
|
||||||
#endif
|
|
||||||
|
|
||||||
static __always_inline void __write_once_size(volatile void *p, void *res, int size)
|
static __always_inline void __write_once_size(volatile void *p, void *res, int size)
|
||||||
{
|
{
|
||||||
|
@ -255,20 +234,21 @@ static __always_inline void __write_once_size(volatile void *p, void *res, int s
|
||||||
/*
|
/*
|
||||||
* Prevent the compiler from merging or refetching reads or writes. The
|
* Prevent the compiler from merging or refetching reads or writes. The
|
||||||
* compiler is also forbidden from reordering successive instances of
|
* compiler is also forbidden from reordering successive instances of
|
||||||
* READ_ONCE, WRITE_ONCE and ACCESS_ONCE (see below), but only when the
|
* READ_ONCE and WRITE_ONCE, but only when the compiler is aware of some
|
||||||
* compiler is aware of some particular ordering. One way to make the
|
* particular ordering. One way to make the compiler aware of ordering is to
|
||||||
* compiler aware of ordering is to put the two invocations of READ_ONCE,
|
* put the two invocations of READ_ONCE or WRITE_ONCE in different C
|
||||||
* WRITE_ONCE or ACCESS_ONCE() in different C statements.
|
* statements.
|
||||||
*
|
*
|
||||||
* In contrast to ACCESS_ONCE these two macros will also work on aggregate
|
* These two macros will also work on aggregate data types like structs or
|
||||||
* data types like structs or unions. If the size of the accessed data
|
* unions. If the size of the accessed data type exceeds the word size of
|
||||||
* type exceeds the word size of the machine (e.g., 32 bits or 64 bits)
|
* the machine (e.g., 32 bits or 64 bits) READ_ONCE() and WRITE_ONCE() will
|
||||||
* READ_ONCE() and WRITE_ONCE() will fall back to memcpy and print a
|
* fall back to memcpy(). There's at least two memcpy()s: one for the
|
||||||
* compile-time warning.
|
* __builtin_memcpy() and then one for the macro doing the copy of variable
|
||||||
|
* - '__u' allocated on the stack.
|
||||||
*
|
*
|
||||||
* Their two major use cases are: (1) Mediating communication between
|
* Their two major use cases are: (1) Mediating communication between
|
||||||
* process-level code and irq/NMI handlers, all running on the same CPU,
|
* process-level code and irq/NMI handlers, all running on the same CPU,
|
||||||
* and (2) Ensuring that the compiler does not fold, spindle, or otherwise
|
* and (2) Ensuring that the compiler does not fold, spindle, or otherwise
|
||||||
* mutilate accesses that either do not require ordering or that interact
|
* mutilate accesses that either do not require ordering or that interact
|
||||||
* with an explicit memory barrier or atomic instruction that provides the
|
* with an explicit memory barrier or atomic instruction that provides the
|
||||||
* required ordering.
|
* required ordering.
|
||||||
|
@ -291,6 +271,12 @@ static __always_inline void __write_once_size(volatile void *p, void *res, int s
|
||||||
*/
|
*/
|
||||||
#define READ_ONCE_NOCHECK(x) __READ_ONCE(x, 0)
|
#define READ_ONCE_NOCHECK(x) __READ_ONCE(x, 0)
|
||||||
|
|
||||||
|
static __no_kasan_or_inline
|
||||||
|
unsigned long read_word_at_a_time(const void *addr)
|
||||||
|
{
|
||||||
|
return *(unsigned long *)addr;
|
||||||
|
}
|
||||||
|
|
||||||
#define WRITE_ONCE(x, val) \
|
#define WRITE_ONCE(x, val) \
|
||||||
({ \
|
({ \
|
||||||
union { typeof(x) __val; char __c[1]; } __u = \
|
union { typeof(x) __val; char __c[1]; } __u = \
|
||||||
|
@ -299,159 +285,29 @@ static __always_inline void __write_once_size(volatile void *p, void *res, int s
|
||||||
__u.__val; \
|
__u.__val; \
|
||||||
})
|
})
|
||||||
|
|
||||||
/**
|
|
||||||
* smp_cond_acquire() - Spin wait for cond with ACQUIRE ordering
|
|
||||||
* @cond: boolean expression to wait for
|
|
||||||
*
|
|
||||||
* Equivalent to using smp_load_acquire() on the condition variable but employs
|
|
||||||
* the control dependency of the wait to reduce the barrier on many platforms.
|
|
||||||
*
|
|
||||||
* The control dependency provides a LOAD->STORE order, the additional RMB
|
|
||||||
* provides LOAD->LOAD order, together they provide LOAD->{LOAD,STORE} order,
|
|
||||||
* aka. ACQUIRE.
|
|
||||||
*/
|
|
||||||
#define smp_cond_acquire(cond) do { \
|
|
||||||
while (!(cond)) \
|
|
||||||
cpu_relax(); \
|
|
||||||
smp_rmb(); /* ctrl + rmb := acquire */ \
|
|
||||||
} while (0)
|
|
||||||
|
|
||||||
#endif /* __KERNEL__ */
|
#endif /* __KERNEL__ */
|
||||||
|
|
||||||
|
/*
|
||||||
|
* Force the compiler to emit 'sym' as a symbol, so that we can reference
|
||||||
|
* it from inline assembler. Necessary in case 'sym' could be inlined
|
||||||
|
* otherwise, or eliminated entirely due to lack of references that are
|
||||||
|
* visible to the compiler.
|
||||||
|
*/
|
||||||
|
#define __ADDRESSABLE(sym) \
|
||||||
|
static void * __section(.discard.addressable) __used \
|
||||||
|
__PASTE(__addressable_##sym, __LINE__) = (void *)&sym;
|
||||||
|
|
||||||
|
/**
|
||||||
|
* offset_to_ptr - convert a relative memory offset to an absolute pointer
|
||||||
|
* @off: the address of the 32-bit offset value
|
||||||
|
*/
|
||||||
|
static inline void *offset_to_ptr(const int *off)
|
||||||
|
{
|
||||||
|
return (void *)((unsigned long)off + *off);
|
||||||
|
}
|
||||||
|
|
||||||
#endif /* __ASSEMBLY__ */
|
#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 documentation 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
|
|
||||||
|
|
||||||
#ifndef __visible
|
|
||||||
#define __visible
|
|
||||||
#endif
|
|
||||||
|
|
||||||
/*
|
|
||||||
* Assume alignment of return value.
|
|
||||||
*/
|
|
||||||
#ifndef __assume_aligned
|
|
||||||
#define __assume_aligned(a, ...)
|
|
||||||
#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
|
|
||||||
|
|
||||||
/* Is this type a native word size -- useful for atomic operations */
|
|
||||||
#ifndef __native_word
|
|
||||||
# define __native_word(t) (sizeof(t) == sizeof(char) || sizeof(t) == sizeof(short) || sizeof(t) == sizeof(int) || sizeof(t) == sizeof(long))
|
|
||||||
#endif
|
|
||||||
|
|
||||||
/* Compile time object size, -1 for unknown */
|
/* Compile time object size, -1 for unknown */
|
||||||
#ifndef __compiletime_object_size
|
#ifndef __compiletime_object_size
|
||||||
# define __compiletime_object_size(obj) -1
|
# define __compiletime_object_size(obj) -1
|
||||||
|
@ -461,29 +317,14 @@ static __always_inline void __write_once_size(volatile void *p, void *res, int s
|
||||||
#endif
|
#endif
|
||||||
#ifndef __compiletime_error
|
#ifndef __compiletime_error
|
||||||
# define __compiletime_error(message)
|
# define __compiletime_error(message)
|
||||||
/*
|
|
||||||
* Sparse complains of variable sized arrays due to the temporary variable in
|
|
||||||
* __compiletime_assert. Unfortunately we can't just expand it out to make
|
|
||||||
* sparse see a constant array size without breaking compiletime_assert on old
|
|
||||||
* versions of GCC (e.g. 4.2.4), so hide the array from sparse altogether.
|
|
||||||
*/
|
|
||||||
# ifndef __CHECKER__
|
|
||||||
# define __compiletime_error_fallback(condition) \
|
|
||||||
do { ((void)sizeof(char[1 - 2 * condition])); } while (0)
|
|
||||||
# endif
|
|
||||||
#endif
|
|
||||||
#ifndef __compiletime_error_fallback
|
|
||||||
# define __compiletime_error_fallback(condition) do { } while (0)
|
|
||||||
#endif
|
#endif
|
||||||
|
|
||||||
#ifdef __OPTIMIZE__
|
#ifdef __OPTIMIZE__
|
||||||
# define __compiletime_assert(condition, msg, prefix, suffix) \
|
# define __compiletime_assert(condition, msg, prefix, suffix) \
|
||||||
do { \
|
do { \
|
||||||
bool __cond = !(condition); \
|
|
||||||
extern void prefix ## suffix(void) __compiletime_error(msg); \
|
extern void prefix ## suffix(void) __compiletime_error(msg); \
|
||||||
if (__cond) \
|
if (!(condition)) \
|
||||||
prefix ## suffix(); \
|
prefix ## suffix(); \
|
||||||
__compiletime_error_fallback(__cond); \
|
|
||||||
} while (0)
|
} while (0)
|
||||||
#else
|
#else
|
||||||
# define __compiletime_assert(condition, msg, prefix, suffix) do { } while (0)
|
# define __compiletime_assert(condition, msg, prefix, suffix) do { } while (0)
|
||||||
|
@ -502,58 +343,13 @@ static __always_inline void __write_once_size(volatile void *p, void *res, int s
|
||||||
* compiler has support to do so.
|
* compiler has support to do so.
|
||||||
*/
|
*/
|
||||||
#define compiletime_assert(condition, msg) \
|
#define compiletime_assert(condition, msg) \
|
||||||
_compiletime_assert(condition, msg, __compiletime_assert_, __LINE__)
|
_compiletime_assert(condition, msg, __compiletime_assert_, __COUNTER__)
|
||||||
|
|
||||||
#define compiletime_assert_atomic_type(t) \
|
#define compiletime_assert_atomic_type(t) \
|
||||||
compiletime_assert(__native_word(t), \
|
compiletime_assert(__native_word(t), \
|
||||||
"Need native word sized stores/loads for atomicity.")
|
"Need native word sized stores/loads for atomicity.")
|
||||||
|
|
||||||
/*
|
/* &a[0] degrades to a pointer: a different type from an array */
|
||||||
* Prevent the compiler from merging or refetching accesses. The compiler
|
#define __must_be_array(a) BUILD_BUG_ON_ZERO(__same_type((a), &(a)[0]))
|
||||||
* 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.
|
|
||||||
*
|
|
||||||
* ACCESS_ONCE will only work on scalar types. For union types, ACCESS_ONCE
|
|
||||||
* on a union member will work as long as the size of the member matches the
|
|
||||||
* size of the union and the size is smaller than word size.
|
|
||||||
*
|
|
||||||
* The major use cases of ACCESS_ONCE used to be (1) Mediating communication
|
|
||||||
* between process-level code and irq/NMI handlers, all running on the same CPU,
|
|
||||||
* and (2) Ensuring that the compiler does not fold, spindle, or otherwise
|
|
||||||
* mutilate accesses that either do not require ordering or that interact
|
|
||||||
* with an explicit memory barrier or atomic instruction that provides the
|
|
||||||
* required ordering.
|
|
||||||
*
|
|
||||||
* If possible use READ_ONCE()/WRITE_ONCE() instead.
|
|
||||||
*/
|
|
||||||
#define __ACCESS_ONCE(x) ({ \
|
|
||||||
__maybe_unused typeof(x) __var = (__force typeof(x)) 0; \
|
|
||||||
(volatile typeof(x) *)&(x); })
|
|
||||||
#define ACCESS_ONCE(x) (*__ACCESS_ONCE(x))
|
|
||||||
|
|
||||||
/**
|
|
||||||
* lockless_dereference() - safely load a pointer for later dereference
|
|
||||||
* @p: The pointer to load
|
|
||||||
*
|
|
||||||
* Similar to rcu_dereference(), but for situations where the pointed-to
|
|
||||||
* object's lifetime is managed by something other than RCU. That
|
|
||||||
* "something other" might be reference counting or simple immortality.
|
|
||||||
*/
|
|
||||||
#define lockless_dereference(p) \
|
|
||||||
({ \
|
|
||||||
typeof(p) _________p1 = READ_ONCE(p); \
|
|
||||||
smp_read_barrier_depends(); /* Dependency order vs. p above. */ \
|
|
||||||
(_________p1); \
|
|
||||||
})
|
|
||||||
|
|
||||||
/* Ignore/forbid kprobes attach on very low level functions marked by this attribute: */
|
|
||||||
#ifdef CONFIG_KPROBES
|
|
||||||
# define __kprobes __attribute__((__section__(".kprobes.text")))
|
|
||||||
# define nokprobe_inline __always_inline
|
|
||||||
#else
|
|
||||||
# define __kprobes
|
|
||||||
# define nokprobe_inline inline
|
|
||||||
#endif
|
|
||||||
#endif /* __LINUX_COMPILER_H */
|
#endif /* __LINUX_COMPILER_H */
|
||||||
|
|
|
@ -0,0 +1,273 @@
|
||||||
|
/* SPDX-License-Identifier: GPL-2.0 */
|
||||||
|
#ifndef __LINUX_COMPILER_ATTRIBUTES_H
|
||||||
|
#define __LINUX_COMPILER_ATTRIBUTES_H
|
||||||
|
|
||||||
|
/*
|
||||||
|
* The attributes in this file are unconditionally defined and they directly
|
||||||
|
* map to compiler attribute(s), unless one of the compilers does not support
|
||||||
|
* the attribute. In that case, __has_attribute is used to check for support
|
||||||
|
* and the reason is stated in its comment ("Optional: ...").
|
||||||
|
*
|
||||||
|
* Any other "attributes" (i.e. those that depend on a configuration option,
|
||||||
|
* on a compiler, on an architecture, on plugins, on other attributes...)
|
||||||
|
* should be defined elsewhere (e.g. compiler_types.h or compiler-*.h).
|
||||||
|
* The intention is to keep this file as simple as possible, as well as
|
||||||
|
* compiler- and version-agnostic (e.g. avoiding GCC_VERSION checks).
|
||||||
|
*
|
||||||
|
* This file is meant to be sorted (by actual attribute name,
|
||||||
|
* not by #define identifier). Use the __attribute__((__name__)) syntax
|
||||||
|
* (i.e. with underscores) to avoid future collisions with other macros.
|
||||||
|
* Provide links to the documentation of each supported compiler, if it exists.
|
||||||
|
*/
|
||||||
|
|
||||||
|
/*
|
||||||
|
* __has_attribute is supported on gcc >= 5, clang >= 2.9 and icc >= 17.
|
||||||
|
* In the meantime, to support 4.6 <= gcc < 5, we implement __has_attribute
|
||||||
|
* by hand.
|
||||||
|
*
|
||||||
|
* sparse does not support __has_attribute (yet) and defines __GNUC_MINOR__
|
||||||
|
* depending on the compiler used to build it; however, these attributes have
|
||||||
|
* no semantic effects for sparse, so it does not matter. Also note that,
|
||||||
|
* in order to avoid sparse's warnings, even the unsupported ones must be
|
||||||
|
* defined to 0.
|
||||||
|
*/
|
||||||
|
#ifndef __has_attribute
|
||||||
|
# define __has_attribute(x) __GCC4_has_attribute_##x
|
||||||
|
# define __GCC4_has_attribute___assume_aligned__ (__GNUC_MINOR__ >= 9)
|
||||||
|
# define __GCC4_has_attribute___copy__ 0
|
||||||
|
# define __GCC4_has_attribute___designated_init__ 0
|
||||||
|
# define __GCC4_has_attribute___externally_visible__ 1
|
||||||
|
# define __GCC4_has_attribute___noclone__ 1
|
||||||
|
# define __GCC4_has_attribute___nonstring__ 0
|
||||||
|
# define __GCC4_has_attribute___no_sanitize_address__ (__GNUC_MINOR__ >= 8)
|
||||||
|
# define __GCC4_has_attribute___fallthrough__ 0
|
||||||
|
#endif
|
||||||
|
|
||||||
|
/*
|
||||||
|
* gcc: https://gcc.gnu.org/onlinedocs/gcc/Common-Function-Attributes.html#index-alias-function-attribute
|
||||||
|
*/
|
||||||
|
#define __alias(symbol) __attribute__((__alias__(#symbol)))
|
||||||
|
|
||||||
|
/*
|
||||||
|
* gcc: https://gcc.gnu.org/onlinedocs/gcc/Common-Function-Attributes.html#index-aligned-function-attribute
|
||||||
|
* gcc: https://gcc.gnu.org/onlinedocs/gcc/Common-Type-Attributes.html#index-aligned-type-attribute
|
||||||
|
* gcc: https://gcc.gnu.org/onlinedocs/gcc/Common-Variable-Attributes.html#index-aligned-variable-attribute
|
||||||
|
*/
|
||||||
|
#define __aligned(x) __attribute__((__aligned__(x)))
|
||||||
|
#define __aligned_largest __attribute__((__aligned__))
|
||||||
|
|
||||||
|
/*
|
||||||
|
* Note: users of __always_inline currently do not write "inline" themselves,
|
||||||
|
* which seems to be required by gcc to apply the attribute according
|
||||||
|
* to its docs (and also "warning: always_inline function might not be
|
||||||
|
* inlinable [-Wattributes]" is emitted).
|
||||||
|
*
|
||||||
|
* gcc: https://gcc.gnu.org/onlinedocs/gcc/Common-Function-Attributes.html#index-always_005finline-function-attribute
|
||||||
|
* clang: mentioned
|
||||||
|
*/
|
||||||
|
#define __always_inline inline __attribute__((__always_inline__))
|
||||||
|
|
||||||
|
/*
|
||||||
|
* The second argument is optional (default 0), so we use a variadic macro
|
||||||
|
* to make the shorthand.
|
||||||
|
*
|
||||||
|
* Beware: Do not apply this to functions which may return
|
||||||
|
* ERR_PTRs. Also, it is probably unwise to apply it to functions
|
||||||
|
* returning extra information in the low bits (but in that case the
|
||||||
|
* compiler should see some alignment anyway, when the return value is
|
||||||
|
* massaged by 'flags = ptr & 3; ptr &= ~3;').
|
||||||
|
*
|
||||||
|
* Optional: only supported since gcc >= 4.9
|
||||||
|
* Optional: not supported by icc
|
||||||
|
*
|
||||||
|
* gcc: https://gcc.gnu.org/onlinedocs/gcc/Common-Function-Attributes.html#index-assume_005faligned-function-attribute
|
||||||
|
* clang: https://clang.llvm.org/docs/AttributeReference.html#assume-aligned
|
||||||
|
*/
|
||||||
|
#if __has_attribute(__assume_aligned__)
|
||||||
|
# define __assume_aligned(a, ...) __attribute__((__assume_aligned__(a, ## __VA_ARGS__)))
|
||||||
|
#else
|
||||||
|
# define __assume_aligned(a, ...)
|
||||||
|
#endif
|
||||||
|
|
||||||
|
/*
|
||||||
|
* gcc: https://gcc.gnu.org/onlinedocs/gcc/Common-Function-Attributes.html#index-cold-function-attribute
|
||||||
|
* gcc: https://gcc.gnu.org/onlinedocs/gcc/Label-Attributes.html#index-cold-label-attribute
|
||||||
|
*/
|
||||||
|
#define __cold __attribute__((__cold__))
|
||||||
|
|
||||||
|
/*
|
||||||
|
* Note the long name.
|
||||||
|
*
|
||||||
|
* gcc: https://gcc.gnu.org/onlinedocs/gcc/Common-Function-Attributes.html#index-const-function-attribute
|
||||||
|
*/
|
||||||
|
#define __attribute_const__ __attribute__((__const__))
|
||||||
|
|
||||||
|
/*
|
||||||
|
* Optional: only supported since gcc >= 9
|
||||||
|
* Optional: not supported by clang
|
||||||
|
* Optional: not supported by icc
|
||||||
|
*
|
||||||
|
* gcc: https://gcc.gnu.org/onlinedocs/gcc/Common-Function-Attributes.html#index-copy-function-attribute
|
||||||
|
*/
|
||||||
|
#if __has_attribute(__copy__)
|
||||||
|
# define __copy(symbol) __attribute__((__copy__(symbol)))
|
||||||
|
#else
|
||||||
|
# define __copy(symbol)
|
||||||
|
#endif
|
||||||
|
|
||||||
|
/*
|
||||||
|
* Don't. Just don't. See commit 771c035372a0 ("deprecate the '__deprecated'
|
||||||
|
* attribute warnings entirely and for good") for more information.
|
||||||
|
*
|
||||||
|
* gcc: https://gcc.gnu.org/onlinedocs/gcc/Common-Function-Attributes.html#index-deprecated-function-attribute
|
||||||
|
* gcc: https://gcc.gnu.org/onlinedocs/gcc/Common-Type-Attributes.html#index-deprecated-type-attribute
|
||||||
|
* gcc: https://gcc.gnu.org/onlinedocs/gcc/Common-Variable-Attributes.html#index-deprecated-variable-attribute
|
||||||
|
* gcc: https://gcc.gnu.org/onlinedocs/gcc/Enumerator-Attributes.html#index-deprecated-enumerator-attribute
|
||||||
|
* clang: https://clang.llvm.org/docs/AttributeReference.html#deprecated
|
||||||
|
*/
|
||||||
|
#define __deprecated
|
||||||
|
|
||||||
|
/*
|
||||||
|
* Optional: only supported since gcc >= 5.1
|
||||||
|
* Optional: not supported by clang
|
||||||
|
* Optional: not supported by icc
|
||||||
|
*
|
||||||
|
* gcc: https://gcc.gnu.org/onlinedocs/gcc/Common-Type-Attributes.html#index-designated_005finit-type-attribute
|
||||||
|
*/
|
||||||
|
#if __has_attribute(__designated_init__)
|
||||||
|
# define __designated_init __attribute__((__designated_init__))
|
||||||
|
#else
|
||||||
|
# define __designated_init
|
||||||
|
#endif
|
||||||
|
|
||||||
|
/*
|
||||||
|
* Optional: not supported by clang
|
||||||
|
*
|
||||||
|
* gcc: https://gcc.gnu.org/onlinedocs/gcc/Common-Function-Attributes.html#index-externally_005fvisible-function-attribute
|
||||||
|
*/
|
||||||
|
#if __has_attribute(__externally_visible__)
|
||||||
|
# define __visible __attribute__((__externally_visible__))
|
||||||
|
#else
|
||||||
|
# define __visible
|
||||||
|
#endif
|
||||||
|
|
||||||
|
/*
|
||||||
|
* gcc: https://gcc.gnu.org/onlinedocs/gcc/Common-Function-Attributes.html#index-format-function-attribute
|
||||||
|
* clang: https://clang.llvm.org/docs/AttributeReference.html#format
|
||||||
|
*/
|
||||||
|
#define __printf(a, b) __attribute__((__format__(printf, a, b)))
|
||||||
|
#define __scanf(a, b) __attribute__((__format__(scanf, a, b)))
|
||||||
|
|
||||||
|
/*
|
||||||
|
* gcc: https://gcc.gnu.org/onlinedocs/gcc/Common-Function-Attributes.html#index-gnu_005finline-function-attribute
|
||||||
|
* clang: https://clang.llvm.org/docs/AttributeReference.html#gnu-inline
|
||||||
|
*/
|
||||||
|
#define __gnu_inline __attribute__((__gnu_inline__))
|
||||||
|
|
||||||
|
/*
|
||||||
|
* gcc: https://gcc.gnu.org/onlinedocs/gcc/Common-Function-Attributes.html#index-malloc-function-attribute
|
||||||
|
*/
|
||||||
|
#define __malloc __attribute__((__malloc__))
|
||||||
|
|
||||||
|
/*
|
||||||
|
* gcc: https://gcc.gnu.org/onlinedocs/gcc/Common-Type-Attributes.html#index-mode-type-attribute
|
||||||
|
* gcc: https://gcc.gnu.org/onlinedocs/gcc/Common-Variable-Attributes.html#index-mode-variable-attribute
|
||||||
|
*/
|
||||||
|
#define __mode(x) __attribute__((__mode__(x)))
|
||||||
|
|
||||||
|
/*
|
||||||
|
* Optional: not supported by clang
|
||||||
|
*
|
||||||
|
* gcc: https://gcc.gnu.org/onlinedocs/gcc/Common-Function-Attributes.html#index-noclone-function-attribute
|
||||||
|
*/
|
||||||
|
#if __has_attribute(__noclone__)
|
||||||
|
# define __noclone __attribute__((__noclone__))
|
||||||
|
#else
|
||||||
|
# define __noclone
|
||||||
|
#endif
|
||||||
|
|
||||||
|
/*
|
||||||
|
* Add the pseudo keyword 'fallthrough' so case statement blocks
|
||||||
|
* must end with any of these keywords:
|
||||||
|
* break;
|
||||||
|
* fallthrough;
|
||||||
|
* goto <label>;
|
||||||
|
* return [expression];
|
||||||
|
*
|
||||||
|
* gcc: https://gcc.gnu.org/onlinedocs/gcc/Statement-Attributes.html#Statement-Attributes
|
||||||
|
*/
|
||||||
|
#if __has_attribute(__fallthrough__)
|
||||||
|
# define fallthrough __attribute__((__fallthrough__))
|
||||||
|
#else
|
||||||
|
# define fallthrough do {} while (0) /* fallthrough */
|
||||||
|
#endif
|
||||||
|
|
||||||
|
/*
|
||||||
|
* Note the missing underscores.
|
||||||
|
*
|
||||||
|
* gcc: https://gcc.gnu.org/onlinedocs/gcc/Common-Function-Attributes.html#index-noinline-function-attribute
|
||||||
|
* clang: mentioned
|
||||||
|
*/
|
||||||
|
#define noinline __attribute__((__noinline__))
|
||||||
|
|
||||||
|
/*
|
||||||
|
* Optional: only supported since gcc >= 8
|
||||||
|
* Optional: not supported by clang
|
||||||
|
* Optional: not supported by icc
|
||||||
|
*
|
||||||
|
* gcc: https://gcc.gnu.org/onlinedocs/gcc/Common-Variable-Attributes.html#index-nonstring-variable-attribute
|
||||||
|
*/
|
||||||
|
#if __has_attribute(__nonstring__)
|
||||||
|
# define __nonstring __attribute__((__nonstring__))
|
||||||
|
#else
|
||||||
|
# define __nonstring
|
||||||
|
#endif
|
||||||
|
|
||||||
|
/*
|
||||||
|
* gcc: https://gcc.gnu.org/onlinedocs/gcc/Common-Function-Attributes.html#index-noreturn-function-attribute
|
||||||
|
* clang: https://clang.llvm.org/docs/AttributeReference.html#noreturn
|
||||||
|
* clang: https://clang.llvm.org/docs/AttributeReference.html#id1
|
||||||
|
*/
|
||||||
|
#define __noreturn __attribute__((__noreturn__))
|
||||||
|
|
||||||
|
/*
|
||||||
|
* gcc: https://gcc.gnu.org/onlinedocs/gcc/Common-Type-Attributes.html#index-packed-type-attribute
|
||||||
|
* clang: https://gcc.gnu.org/onlinedocs/gcc/Common-Variable-Attributes.html#index-packed-variable-attribute
|
||||||
|
*/
|
||||||
|
#define __packed __attribute__((__packed__))
|
||||||
|
|
||||||
|
/*
|
||||||
|
* gcc: https://gcc.gnu.org/onlinedocs/gcc/Common-Function-Attributes.html#index-pure-function-attribute
|
||||||
|
*/
|
||||||
|
#define __pure __attribute__((__pure__))
|
||||||
|
|
||||||
|
/*
|
||||||
|
* gcc: https://gcc.gnu.org/onlinedocs/gcc/Common-Function-Attributes.html#index-section-function-attribute
|
||||||
|
* gcc: https://gcc.gnu.org/onlinedocs/gcc/Common-Variable-Attributes.html#index-section-variable-attribute
|
||||||
|
* clang: https://clang.llvm.org/docs/AttributeReference.html#section-declspec-allocate
|
||||||
|
*/
|
||||||
|
#define __section(S) __attribute__((__section__(#S)))
|
||||||
|
|
||||||
|
/*
|
||||||
|
* gcc: https://gcc.gnu.org/onlinedocs/gcc/Common-Function-Attributes.html#index-unused-function-attribute
|
||||||
|
* gcc: https://gcc.gnu.org/onlinedocs/gcc/Common-Type-Attributes.html#index-unused-type-attribute
|
||||||
|
* gcc: https://gcc.gnu.org/onlinedocs/gcc/Common-Variable-Attributes.html#index-unused-variable-attribute
|
||||||
|
* gcc: https://gcc.gnu.org/onlinedocs/gcc/Label-Attributes.html#index-unused-label-attribute
|
||||||
|
* clang: https://clang.llvm.org/docs/AttributeReference.html#maybe-unused-unused
|
||||||
|
*/
|
||||||
|
#define __always_unused __attribute__((__unused__))
|
||||||
|
#define __maybe_unused __attribute__((__unused__))
|
||||||
|
|
||||||
|
/*
|
||||||
|
* gcc: https://gcc.gnu.org/onlinedocs/gcc/Common-Function-Attributes.html#index-used-function-attribute
|
||||||
|
* gcc: https://gcc.gnu.org/onlinedocs/gcc/Common-Variable-Attributes.html#index-used-variable-attribute
|
||||||
|
*/
|
||||||
|
#define __used __attribute__((__used__))
|
||||||
|
|
||||||
|
/*
|
||||||
|
* gcc: https://gcc.gnu.org/onlinedocs/gcc/Common-Function-Attributes.html#index-weak-function-attribute
|
||||||
|
* gcc: https://gcc.gnu.org/onlinedocs/gcc/Common-Variable-Attributes.html#index-weak-variable-attribute
|
||||||
|
*/
|
||||||
|
#define __weak __attribute__((__weak__))
|
||||||
|
|
||||||
|
#endif /* __LINUX_COMPILER_ATTRIBUTES_H */
|
|
@ -0,0 +1,237 @@
|
||||||
|
/* SPDX-License-Identifier: GPL-2.0 */
|
||||||
|
#ifndef __LINUX_COMPILER_TYPES_H
|
||||||
|
#define __LINUX_COMPILER_TYPES_H
|
||||||
|
|
||||||
|
#ifndef __ASSEMBLY__
|
||||||
|
|
||||||
|
#ifdef __CHECKER__
|
||||||
|
# define __user __attribute__((noderef, address_space(1)))
|
||||||
|
# define __kernel __attribute__((address_space(0)))
|
||||||
|
# define __safe __attribute__((safe))
|
||||||
|
# define __force __attribute__((force))
|
||||||
|
# define __nocast __attribute__((nocast))
|
||||||
|
# define __iomem __attribute__((noderef, address_space(2)))
|
||||||
|
# define __must_hold(x) __attribute__((context(x,1,1)))
|
||||||
|
# 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)
|
||||||
|
# define __percpu __attribute__((noderef, address_space(3)))
|
||||||
|
# define __rcu __attribute__((noderef, address_space(4)))
|
||||||
|
# define __private __attribute__((noderef))
|
||||||
|
extern void __chk_user_ptr(const volatile void __user *);
|
||||||
|
extern void __chk_io_ptr(const volatile void __iomem *);
|
||||||
|
# define ACCESS_PRIVATE(p, member) (*((typeof((p)->member) __force *) &(p)->member))
|
||||||
|
#else /* __CHECKER__ */
|
||||||
|
# ifdef STRUCTLEAK_PLUGIN
|
||||||
|
# define __user __attribute__((user))
|
||||||
|
# else
|
||||||
|
# define __user
|
||||||
|
# endif
|
||||||
|
# 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 __must_hold(x)
|
||||||
|
# define __acquires(x)
|
||||||
|
# define __releases(x)
|
||||||
|
# define __acquire(x) (void)0
|
||||||
|
# define __release(x) (void)0
|
||||||
|
# define __cond_lock(x,c) (c)
|
||||||
|
# define __percpu
|
||||||
|
# define __rcu
|
||||||
|
# define __private
|
||||||
|
# define ACCESS_PRIVATE(p, member) ((p)->member)
|
||||||
|
#endif /* __CHECKER__ */
|
||||||
|
|
||||||
|
/* Indirect macros required for expanded argument pasting, eg. __LINE__. */
|
||||||
|
#define ___PASTE(a,b) a##b
|
||||||
|
#define __PASTE(a,b) ___PASTE(a,b)
|
||||||
|
|
||||||
|
#ifdef __KERNEL__
|
||||||
|
|
||||||
|
/* Attributes */
|
||||||
|
#include <linux/compiler_attributes.h>
|
||||||
|
|
||||||
|
/* Compiler specific macros. */
|
||||||
|
#ifdef __clang__
|
||||||
|
#include <linux/compiler-clang.h>
|
||||||
|
#elif defined(__INTEL_COMPILER)
|
||||||
|
#include <linux/compiler-intel.h>
|
||||||
|
#elif defined(__GNUC__)
|
||||||
|
/* The above compilers also define __GNUC__, so order is important here. */
|
||||||
|
#include <linux/compiler-gcc.h>
|
||||||
|
#else
|
||||||
|
#error "Unknown compiler"
|
||||||
|
#endif
|
||||||
|
|
||||||
|
/*
|
||||||
|
* Some architectures need to provide custom definitions of macros provided
|
||||||
|
* by linux/compiler-*.h, and can do so using asm/compiler.h. We include that
|
||||||
|
* conditionally rather than using an asm-generic wrapper in order to avoid
|
||||||
|
* build failures if any C compilation, which will include this file via an
|
||||||
|
* -include argument in c_flags, occurs prior to the asm-generic wrappers being
|
||||||
|
* generated.
|
||||||
|
*/
|
||||||
|
#ifdef CONFIG_HAVE_ARCH_COMPILER_H
|
||||||
|
#include <asm/compiler.h>
|
||||||
|
#endif
|
||||||
|
|
||||||
|
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];
|
||||||
|
};
|
||||||
|
};
|
||||||
|
|
||||||
|
struct ftrace_likely_data {
|
||||||
|
struct ftrace_branch_data data;
|
||||||
|
unsigned long constant;
|
||||||
|
};
|
||||||
|
|
||||||
|
#ifdef CONFIG_ENABLE_MUST_CHECK
|
||||||
|
#define __must_check __attribute__((__warn_unused_result__))
|
||||||
|
#else
|
||||||
|
#define __must_check
|
||||||
|
#endif
|
||||||
|
|
||||||
|
#if defined(CC_USING_HOTPATCH)
|
||||||
|
#define notrace __attribute__((hotpatch(0, 0)))
|
||||||
|
#elif defined(CC_USING_PATCHABLE_FUNCTION_ENTRY)
|
||||||
|
#define notrace __attribute__((patchable_function_entry(0, 0)))
|
||||||
|
#else
|
||||||
|
#define notrace __attribute__((__no_instrument_function__))
|
||||||
|
#endif
|
||||||
|
|
||||||
|
/*
|
||||||
|
* 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.
|
||||||
|
*/
|
||||||
|
#define __naked __attribute__((__naked__)) notrace
|
||||||
|
|
||||||
|
#define __compiler_offsetof(a, b) __builtin_offsetof(a, b)
|
||||||
|
|
||||||
|
/*
|
||||||
|
* Prefer gnu_inline, so that extern inline functions do not emit an
|
||||||
|
* externally visible function. This makes extern inline behave as per gnu89
|
||||||
|
* semantics rather than c99. This prevents multiple symbol definition errors
|
||||||
|
* of extern inline functions at link time.
|
||||||
|
* A lot of inline functions can cause havoc with function tracing.
|
||||||
|
*/
|
||||||
|
#define inline inline __gnu_inline __inline_maybe_unused notrace
|
||||||
|
|
||||||
|
/*
|
||||||
|
* gcc provides both __inline__ and __inline as alternate spellings of
|
||||||
|
* the inline keyword, though the latter is undocumented. New kernel
|
||||||
|
* code should only use the inline spelling, but some existing code
|
||||||
|
* uses __inline__. Since we #define inline above, to ensure
|
||||||
|
* __inline__ has the same semantics, we need this #define.
|
||||||
|
*
|
||||||
|
* However, the spelling __inline is strictly reserved for referring
|
||||||
|
* to the bare keyword.
|
||||||
|
*/
|
||||||
|
#define __inline__ inline
|
||||||
|
|
||||||
|
/*
|
||||||
|
* GCC does not warn about unused static inline functions for -Wunused-function.
|
||||||
|
* Suppress the warning in clang as well by using __maybe_unused, but enable it
|
||||||
|
* for W=1 build. This will allow clang to find unused functions. Remove the
|
||||||
|
* __inline_maybe_unused entirely after fixing most of -Wunused-function warnings.
|
||||||
|
*/
|
||||||
|
#ifdef KBUILD_EXTRA_WARN1
|
||||||
|
#define __inline_maybe_unused
|
||||||
|
#else
|
||||||
|
#define __inline_maybe_unused __maybe_unused
|
||||||
|
#endif
|
||||||
|
|
||||||
|
/*
|
||||||
|
* Rather then using noinline to prevent stack consumption, use
|
||||||
|
* noinline_for_stack instead. For documentation reasons.
|
||||||
|
*/
|
||||||
|
#define noinline_for_stack noinline
|
||||||
|
|
||||||
|
#endif /* __KERNEL__ */
|
||||||
|
|
||||||
|
#endif /* __ASSEMBLY__ */
|
||||||
|
|
||||||
|
/*
|
||||||
|
* The below symbols may be defined for one or more, but not ALL, of the above
|
||||||
|
* compilers. We don't consider that to be an error, so set them to nothing.
|
||||||
|
* For example, some of them are for compiler specific plugins.
|
||||||
|
*/
|
||||||
|
#ifndef __latent_entropy
|
||||||
|
# define __latent_entropy
|
||||||
|
#endif
|
||||||
|
|
||||||
|
#ifndef __randomize_layout
|
||||||
|
# define __randomize_layout __designated_init
|
||||||
|
#endif
|
||||||
|
|
||||||
|
#ifndef __no_randomize_layout
|
||||||
|
# define __no_randomize_layout
|
||||||
|
#endif
|
||||||
|
|
||||||
|
#ifndef randomized_struct_fields_start
|
||||||
|
# define randomized_struct_fields_start
|
||||||
|
# define randomized_struct_fields_end
|
||||||
|
#endif
|
||||||
|
|
||||||
|
#ifndef asm_volatile_goto
|
||||||
|
#define asm_volatile_goto(x...) asm goto(x)
|
||||||
|
#endif
|
||||||
|
|
||||||
|
#ifdef CONFIG_CC_HAS_ASM_INLINE
|
||||||
|
#define asm_inline asm __inline
|
||||||
|
#else
|
||||||
|
#define asm_inline asm
|
||||||
|
#endif
|
||||||
|
|
||||||
|
#ifndef __no_fgcse
|
||||||
|
# define __no_fgcse
|
||||||
|
#endif
|
||||||
|
|
||||||
|
/* Are two types/vars the same type (ignoring qualifiers)? */
|
||||||
|
#define __same_type(a, b) __builtin_types_compatible_p(typeof(a), typeof(b))
|
||||||
|
|
||||||
|
/* Is this type a native word size -- useful for atomic operations */
|
||||||
|
#define __native_word(t) \
|
||||||
|
(sizeof(t) == sizeof(char) || sizeof(t) == sizeof(short) || \
|
||||||
|
sizeof(t) == sizeof(int) || sizeof(t) == sizeof(long))
|
||||||
|
|
||||||
|
/* Helpers for emitting diagnostics in pragmas. */
|
||||||
|
#ifndef __diag
|
||||||
|
#define __diag(string)
|
||||||
|
#endif
|
||||||
|
|
||||||
|
#ifndef __diag_GCC
|
||||||
|
#define __diag_GCC(version, severity, string)
|
||||||
|
#endif
|
||||||
|
|
||||||
|
#define __diag_push() __diag(push)
|
||||||
|
#define __diag_pop() __diag(pop)
|
||||||
|
|
||||||
|
#define __diag_ignore(compiler, version, option, comment) \
|
||||||
|
__diag_ ## compiler(version, ignore, option)
|
||||||
|
#define __diag_warn(compiler, version, option, comment) \
|
||||||
|
__diag_ ## compiler(version, warn, option)
|
||||||
|
#define __diag_error(compiler, version, option, comment) \
|
||||||
|
__diag_ ## compiler(version, error, option)
|
||||||
|
|
||||||
|
#endif /* __LINUX_COMPILER_TYPES_H */
|
|
@ -26,8 +26,6 @@
|
||||||
#include <linux/types.h>
|
#include <linux/types.h>
|
||||||
#include <linux/string.h>
|
#include <linux/string.h>
|
||||||
|
|
||||||
#define noinline __attribute__((noinline))
|
|
||||||
|
|
||||||
/* we use this so that we can do without the ctype library */
|
/* we use this so that we can do without the ctype library */
|
||||||
#define is_digit(c) ((c) >= '0' && (c) <= '9')
|
#define is_digit(c) ((c) >= '0' && (c) <= '9')
|
||||||
|
|
||||||
|
|
Loading…
Reference in New Issue