1 | /* SPDX-License-Identifier: GPL-2.0 */ |
2 | #ifndef _ASM_X86_IA32_H |
3 | #define _ASM_X86_IA32_H |
4 | |
5 | |
6 | #ifdef CONFIG_IA32_EMULATION |
7 | |
8 | #include <linux/compat.h> |
9 | |
10 | /* |
11 | * 32 bit structures for IA32 support. |
12 | */ |
13 | |
14 | #include <uapi/asm/sigcontext.h> |
15 | |
16 | /* signal.h */ |
17 | |
18 | struct ucontext_ia32 { |
19 | unsigned int uc_flags; |
20 | unsigned int uc_link; |
21 | compat_stack_t uc_stack; |
22 | struct sigcontext_32 uc_mcontext; |
23 | compat_sigset_t uc_sigmask; /* mask last for extensibility */ |
24 | }; |
25 | |
26 | /* This matches struct stat64 in glibc2.2, hence the absolutely |
27 | * insane amounts of padding around dev_t's. |
28 | */ |
29 | struct stat64 { |
30 | unsigned long long st_dev; |
31 | unsigned char __pad0[4]; |
32 | |
33 | #define STAT64_HAS_BROKEN_ST_INO 1 |
34 | unsigned int __st_ino; |
35 | |
36 | unsigned int st_mode; |
37 | unsigned int st_nlink; |
38 | |
39 | unsigned int st_uid; |
40 | unsigned int st_gid; |
41 | |
42 | unsigned long long st_rdev; |
43 | unsigned char __pad3[4]; |
44 | |
45 | long long st_size; |
46 | unsigned int st_blksize; |
47 | |
48 | long long st_blocks;/* Number 512-byte blocks allocated */ |
49 | |
50 | unsigned st_atime; |
51 | unsigned st_atime_nsec; |
52 | unsigned st_mtime; |
53 | unsigned st_mtime_nsec; |
54 | unsigned st_ctime; |
55 | unsigned st_ctime_nsec; |
56 | |
57 | unsigned long long st_ino; |
58 | } __attribute__((packed)); |
59 | |
60 | #define IA32_STACK_TOP IA32_PAGE_OFFSET |
61 | |
62 | #ifdef __KERNEL__ |
63 | struct linux_binprm; |
64 | extern int ia32_setup_arg_pages(struct linux_binprm *bprm, |
65 | unsigned long stack_top, int exec_stack); |
66 | struct mm_struct; |
67 | extern void ia32_pick_mmap_layout(struct mm_struct *mm); |
68 | |
69 | #endif |
70 | |
71 | extern bool __ia32_enabled; |
72 | |
73 | static inline bool ia32_enabled(void) |
74 | { |
75 | return __ia32_enabled; |
76 | } |
77 | |
78 | #else /* !CONFIG_IA32_EMULATION */ |
79 | |
80 | static inline bool ia32_enabled(void) |
81 | { |
82 | return IS_ENABLED(CONFIG_X86_32); |
83 | } |
84 | |
85 | #endif |
86 | |
87 | #endif /* _ASM_X86_IA32_H */ |
88 | |