1/* SPDX-License-Identifier: GPL-2.0 */
2#ifndef _ASM_X86_IA32_H
3#define _ASM_X86_IA32_H
4
5#ifdef CONFIG_IA32_EMULATION
6
7#include <linux/compat.h>
8
9/*
10 * 32 bit structures for IA32 support.
11 */
12
13#include <uapi/asm/sigcontext.h>
14
15/* signal.h */
16
17struct ucontext_ia32 {
18 unsigned int uc_flags;
19 unsigned int uc_link;
20 compat_stack_t uc_stack;
21 struct sigcontext_32 uc_mcontext;
22 compat_sigset_t uc_sigmask; /* mask last for extensibility */
23};
24
25/* This matches struct stat64 in glibc2.2, hence the absolutely
26 * insane amounts of padding around dev_t's.
27 */
28struct stat64 {
29 unsigned long long st_dev;
30 unsigned char __pad0[4];
31
32#define STAT64_HAS_BROKEN_ST_INO 1
33 unsigned int __st_ino;
34
35 unsigned int st_mode;
36 unsigned int st_nlink;
37
38 unsigned int st_uid;
39 unsigned int st_gid;
40
41 unsigned long long st_rdev;
42 unsigned char __pad3[4];
43
44 long long st_size;
45 unsigned int st_blksize;
46
47 long long st_blocks;/* Number 512-byte blocks allocated */
48
49 unsigned st_atime;
50 unsigned st_atime_nsec;
51 unsigned st_mtime;
52 unsigned st_mtime_nsec;
53 unsigned st_ctime;
54 unsigned st_ctime_nsec;
55
56 unsigned long long st_ino;
57} __attribute__((packed));
58
59extern bool __ia32_enabled;
60
61static __always_inline bool ia32_enabled(void)
62{
63 return __ia32_enabled;
64}
65
66static inline void ia32_disable(void)
67{
68 __ia32_enabled = false;
69}
70
71#else /* !CONFIG_IA32_EMULATION */
72
73static __always_inline bool ia32_enabled(void)
74{
75 return IS_ENABLED(CONFIG_X86_32);
76}
77
78static inline void ia32_disable(void) {}
79
80#endif
81
82static inline bool ia32_enabled_verbose(void)
83{
84 bool enabled = ia32_enabled();
85
86 if (IS_ENABLED(CONFIG_IA32_EMULATION) && !enabled)
87 pr_notice_once("32-bit emulation disabled. You can reenable with ia32_emulation=on\n");
88
89 return enabled;
90}
91
92#endif /* _ASM_X86_IA32_H */
93

source code of linux/arch/x86/include/asm/ia32.h