1#ifndef _ASM_X86_IA32_H
 2#define _ASM_X86_IA32_H
 3
 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
59#define IA32_STACK_TOP IA32_PAGE_OFFSET
60
61#ifdef __KERNEL__
62struct linux_binprm;
63extern int ia32_setup_arg_pages(struct linux_binprm *bprm,
64				unsigned long stack_top, int exec_stack);
65struct mm_struct;
66extern void ia32_pick_mmap_layout(struct mm_struct *mm);
67
68#endif
69
70#endif /* !CONFIG_IA32_SUPPORT */
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
71
72#endif /* _ASM_X86_IA32_H */

  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
 59#define IA32_STACK_TOP IA32_PAGE_OFFSET
 60
 61#ifdef __KERNEL__
 62struct linux_binprm;
 63extern int ia32_setup_arg_pages(struct linux_binprm *bprm,
 64				unsigned long stack_top, int exec_stack);
 65struct mm_struct;
 66extern void ia32_pick_mmap_layout(struct mm_struct *mm);
 67
 68#endif
 69
 70extern bool __ia32_enabled;
 71
 72static inline bool ia32_enabled(void)
 73{
 74	return __ia32_enabled;
 75}
 76
 77static inline void ia32_disable(void)
 78{
 79	__ia32_enabled = false;
 80}
 81
 82#else /* !CONFIG_IA32_EMULATION */
 83
 84static inline bool ia32_enabled(void)
 85{
 86	return IS_ENABLED(CONFIG_X86_32);
 87}
 88
 89static inline void ia32_disable(void) {}
 90
 91#endif
 92
 93static inline bool ia32_enabled_verbose(void)
 94{
 95	bool enabled = ia32_enabled();
 96
 97	if (IS_ENABLED(CONFIG_IA32_EMULATION) && !enabled)
 98		pr_notice_once("32-bit emulation disabled. You can reenable with ia32_emulation=on\n");
 99
100	return enabled;
101}
102
103#endif /* _ASM_X86_IA32_H */