Advertisement
Not a member of Pastebin yet?
Sign Up,
it unlocks many cool features!
- /* 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."
- #endif
- /*
- * Common definitions for all gcc versions go here.
- */
- #define GCC_VERSION (__GNUC__ * 10000 \
- + __GNUC_MINOR__ * 100 \
- + __GNUC_PATCHLEVEL__)
- /*
- * 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)); \
- })
- #ifdef CONFIG_RETPOLINE
- #define __noretpoline __attribute__((__indirect_branch__("keep")))
- #endif
- #define __UNIQUE_ID(prefix) __PASTE(__PASTE(__UNIQUE_ID_, prefix), __COUNTER__)
- #define __compiletime_object_size(obj) __builtin_object_size(obj, 0)
- #define __compiletime_warning(message) __attribute__((__warning__(message)))
- #define __compiletime_error(message) __attribute__((__error__(message)))
- #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("")
- /*
- * Mark a position in code as unreachable. This can be used to
- * suppress control flow warnings after asm blocks that transfer
- * control elsewhere.
- */
- #define unreachable() \
- do { \
- annotate_unreachable(); \
- barrier_before_unreachable(); \
- __builtin_unreachable(); \
- } while (0)
- #if defined(RANDSTRUCT_PLUGIN) && !defined(__CHECKER__)
- #define __randomize_layout __attribute__((randomize_layout))
- #define __no_randomize_layout __attribute__((no_randomize_layout))
- /* This anon struct can add padding, so only enable it under randstruct. */
- #define randomized_struct_fields_start struct {
- #define randomized_struct_fields_end } __randomize_layout;
- #endif
- /*
- * GCC 'asm goto' miscompiles certain code sequences:
- *
- * http://gcc.gnu.org/bugzilla/show_bug.cgi?id=58670
- *
- * Work it around via a compiler barrier quirk suggested by Jakub Jelinek.
- *
- * (asm goto is automatically volatile - the naming reflects this.)
- */
- #define asm_volatile_goto(x...) do { asm goto(x); asm (""); } while (0)
- #if defined(CONFIG_ARCH_USE_BUILTIN_BSWAP)
- #define __HAVE_BUILTIN_BSWAP32__
- #define __HAVE_BUILTIN_BSWAP64__
- #define __HAVE_BUILTIN_BSWAP16__
- #endif /* CONFIG_ARCH_USE_BUILTIN_BSWAP */
- #if GCC_VERSION >= 70000
- #define KASAN_ABI_VERSION 5
- #elif GCC_VERSION >= 50000
- #define KASAN_ABI_VERSION 4
- #elif GCC_VERSION >= 40902
- #define KASAN_ABI_VERSION 3
- #endif
- #if __has_attribute(__no_sanitize_address__)
- #define __no_sanitize_address __attribute__((no_sanitize_address))
- #else
- #define __no_sanitize_address
- #endif
- #if defined(__SANITIZE_THREAD__) && __has_attribute(__no_sanitize_thread__)
- #define __no_sanitize_thread __attribute__((no_sanitize_thread))
- #else
- #define __no_sanitize_thread
- #endif
- #if __has_attribute(__no_sanitize_undefined__)
- #define __no_sanitize_undefined __attribute__((no_sanitize_undefined))
- #else
- #define __no_sanitize_undefined
- #endif
- #if GCC_VERSION >= 50100
- #define COMPILER_HAS_GENERIC_BUILTIN_OVERFLOW 1
- #endif
- /*
- * Turn individual warnings and errors on and off locally, depending
- * on version.
- */
- #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
Advertisement
Add Comment
Please, Sign In to add comment
Advertisement