1 /* SPDX-License-Identifier: GPL-2.0 */ 1
2 #ifndef __LINUX_COMPILER_TYPES_H
3 #error "Please don't include <linux/compiler-g
4 #endif
5
6 /*
7 * Common definitions for all gcc versions go
8 */
9 #define GCC_VERSION (__GNUC__ * 10000
10 + __GNUC_MINOR__ * 100
11 + __GNUC_PATCHLEVEL__)
12
13 /*
14 * This macro obfuscates arithmetic on a varia
15 * shouldn't recognize the original var, and m
16 *
17 * This is needed because the C standard makes
18 * pointer arithmetic on "objects" outside the
19 * gcc optimizers assume this is the case. In
20 * assume such arithmetic does not wrap.
21 *
22 * A miscompilation has been observed because
23 * To work around it we hide the relationship
24 * using this macro.
25 *
26 * Versions of the ppc64 compiler before 4.1 h
27 * RELOC_HIDE could trash r30. The bug can be
28 * the inline assembly constraint from =g to =
29 * case either is valid.
30 */
31 #define RELOC_HIDE(ptr, off)
32 ({
33 unsigned long __ptr;
34 __asm__ ("" : "=r"(__ptr) : ""(ptr));
35 (typeof(ptr)) (__ptr + (off));
36 })
37
38 #ifdef CONFIG_MITIGATION_RETPOLINE
39 #define __noretpoline __attribute__((__indirec
40 #endif
41
42 #if defined(LATENT_ENTROPY_PLUGIN) && !defined
43 #define __latent_entropy __attribute__((latent
44 #endif
45
46 /*
47 * calling noreturn functions, __builtin_unrea
48 * confuse the stack allocation in gcc, leadin
49 * frames, see https://gcc.gnu.org/bugzilla/sh
50 *
51 * Adding an empty inline assembly before it w
52 */
53 #define barrier_before_unreachable() asm volat
54
55 /*
56 * Mark a position in code as unreachable. Th
57 * suppress control flow warnings after asm bl
58 * control elsewhere.
59 */
60 #define unreachable() \
61 do {
62 annotate_unreachable();
63 barrier_before_unreachable();
64 __builtin_unreachable();
65 } while (0)
66
67 #if defined(CONFIG_ARCH_USE_BUILTIN_BSWAP)
68 #define __HAVE_BUILTIN_BSWAP32__
69 #define __HAVE_BUILTIN_BSWAP64__
70 #define __HAVE_BUILTIN_BSWAP16__
71 #endif /* CONFIG_ARCH_USE_BUILTIN_BSWAP */
72
73 #if GCC_VERSION >= 70000
74 #define KASAN_ABI_VERSION 5
75 #else
76 #define KASAN_ABI_VERSION 4
77 #endif
78
79 #ifdef CONFIG_SHADOW_CALL_STACK
80 #define __noscs __attribute__((__no_sanitize__
81 #endif
82
83 #ifdef __SANITIZE_HWADDRESS__
84 #define __no_sanitize_address __attribute__((_
85 #else
86 #define __no_sanitize_address __attribute__((_
87 #endif
88
89 #if defined(__SANITIZE_THREAD__)
90 #define __no_sanitize_thread __attribute__((__
91 #else
92 #define __no_sanitize_thread
93 #endif
94
95 #define __no_sanitize_undefined __attribute__(
96
97 /*
98 * Only supported since gcc >= 12
99 */
100 #if defined(CONFIG_KCOV) && __has_attribute(__
101 #define __no_sanitize_coverage __attribute__((
102 #else
103 #define __no_sanitize_coverage
104 #endif
105
106 /*
107 * Treat __SANITIZE_HWADDRESS__ the same as __
108 * matching the defines used by Clang.
109 */
110 #ifdef __SANITIZE_HWADDRESS__
111 #define __SANITIZE_ADDRESS__
112 #endif
113
114 /*
115 * GCC does not support KMSAN.
116 */
117 #define __no_sanitize_memory
118 #define __no_kmsan_checks
119
120 /*
121 * Turn individual warnings and errors on and
122 * on version.
123 */
124 #define __diag_GCC(version, severity, s) \
125 __diag_GCC_ ## version(__diag_GCC_ ##
126
127 /* Severity used in pragma directives */
128 #define __diag_GCC_ignore ignored
129 #define __diag_GCC_warn warning
130 #define __diag_GCC_error error
131
132 #define __diag_str1(s) #s
133 #define __diag_str(s) __diag_str1(s)
134 #define __diag(s) _Pragma(__diag
135
136 #if GCC_VERSION >= 80000
137 #define __diag_GCC_8(s) __diag(s)
138 #else
139 #define __diag_GCC_8(s)
140 #endif
141
142 #define __diag_ignore_all(option, comment) \
143 __diag(__diag_GCC_ignore option)
144
145 /*
146 * Prior to 9.1, -Wno-alloc-size-larger-than (
147 * attribute) do not work, and must be disable
148 */
149 #if GCC_VERSION < 90100
150 #undef __alloc_size__
151 #endif
152
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