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 18struct 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 */ 29struct 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__ 63struct linux_binprm; 64extern int ia32_setup_arg_pages(struct linux_binprm *bprm, 65 unsigned long stack_top, int exec_stack); 66struct mm_struct; 67extern void ia32_pick_mmap_layout(struct mm_struct *mm); 68 69#endif 70 71extern bool __ia32_enabled; 72 73static inline bool ia32_enabled(void) 74{ 75 return __ia32_enabled; 76} 77 78static inline void ia32_disable(void) 79{ 80 __ia32_enabled = false; 81} 82 83#else /* !CONFIG_IA32_EMULATION */ 84 85static inline bool ia32_enabled(void) 86{ 87 return IS_ENABLED(CONFIG_X86_32); 88} 89 90static inline void ia32_disable(void) {} 91 92#endif 93 94#endif /* _ASM_X86_IA32_H */ 95