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torvalds
GitHub Repository: torvalds/linux
 Path: blob/master/arch/x86/include/asm/compat.h
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/* SPDX-License-Identifier: GPL-2.0 */

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#ifndef _ASM_X86_COMPAT_H

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#define _ASM_X86_COMPAT_H

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/*

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 * Architecture specific compatibility types

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 */

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#include <linux/types.h>

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#include <linux/sched.h>

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#include <linux/sched/task_stack.h>

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#include <asm/processor.h>

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#include <asm/user32.h>

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#include <asm/unistd.h>

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#define compat_mode_t	compat_mode_t

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typedef u16		compat_mode_t;

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#define __compat_uid_t	__compat_uid_t

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typedef u16		__compat_uid_t;

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typedef u16		__compat_gid_t;

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#define compat_dev_t	compat_dev_t

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typedef u16		compat_dev_t;

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#define compat_ipc_pid_t compat_ipc_pid_t

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typedef u16		 compat_ipc_pid_t;

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#define compat_statfs	compat_statfs

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#include <asm-generic/compat.h>

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#define COMPAT_UTS_MACHINE	"i686\0\0"

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typedef u16		compat_nlink_t;

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struct compat_stat {

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	u32		st_dev;

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	compat_ino_t	st_ino;

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	compat_mode_t	st_mode;

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	compat_nlink_t	st_nlink;

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	__compat_uid_t	st_uid;

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	__compat_gid_t	st_gid;

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	u32		st_rdev;

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	u32		st_size;

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	u32		st_blksize;

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	u32		st_blocks;

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	u32		st_atime;

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	u32		st_atime_nsec;

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	u32		st_mtime;

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	u32		st_mtime_nsec;

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	u32		st_ctime;

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	u32		st_ctime_nsec;

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	u32		__unused4;

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	u32		__unused5;

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};

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/*

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 * IA32 uses 4 byte alignment for 64 bit quantities, so we need to pack the

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 * compat flock64 structure.

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 */

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#define __ARCH_NEED_COMPAT_FLOCK64_PACKED

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struct compat_statfs {

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	int		f_type;

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	int		f_bsize;

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	int		f_blocks;

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	int		f_bfree;

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	int		f_bavail;

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	int		f_files;

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	int		f_ffree;

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	compat_fsid_t	f_fsid;

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	int		f_namelen;	/* SunOS ignores this field. */

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	int		f_frsize;

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	int		f_flags;

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	int		f_spare[4];

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};

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#ifdef CONFIG_X86_X32_ABI

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#define COMPAT_USE_64BIT_TIME \

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	(!!(task_pt_regs(current)->orig_ax & __X32_SYSCALL_BIT))

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#endif

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static inline bool in_x32_syscall(void)

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{

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#ifdef CONFIG_X86_X32_ABI

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	if (task_pt_regs(current)->orig_ax & __X32_SYSCALL_BIT)

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		return true;

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#endif

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	return false;

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}

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static inline bool in_32bit_syscall(void)

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{

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	return in_ia32_syscall() || in_x32_syscall();

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}

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#ifdef CONFIG_COMPAT

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static inline bool in_compat_syscall(void)

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{

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	return in_32bit_syscall();

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}

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#define in_compat_syscall in_compat_syscall	/* override the generic impl */

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#define compat_need_64bit_alignment_fixup in_ia32_syscall

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#endif

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struct compat_siginfo;

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#ifdef CONFIG_X86_X32_ABI

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int copy_siginfo_to_user32(struct compat_siginfo __user *to,

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		const kernel_siginfo_t *from);

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#define copy_siginfo_to_user32 copy_siginfo_to_user32

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#endif /* CONFIG_X86_X32_ABI */

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#endif /* _ASM_X86_COMPAT_H */

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