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torvalds
GitHub Repository: torvalds/linux
 Path: blob/master/arch/arm64/include/asm/compat.h
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/* SPDX-License-Identifier: GPL-2.0-only */

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/*

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 * Copyright (C) 2012 ARM Ltd.

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 */

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#ifndef __ASM_COMPAT_H

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#define __ASM_COMPAT_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_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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#ifdef CONFIG_COMPAT

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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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#ifdef __AARCH64EB__

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#define COMPAT_UTS_MACHINE	"armv8b\0\0"

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#else

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#define COMPAT_UTS_MACHINE	"armv8l\0\0"

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#endif

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typedef u16		__compat_uid16_t;

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typedef u16		__compat_gid16_t;

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typedef s32		compat_nlink_t;

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struct compat_stat {

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#ifdef __AARCH64EB__

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	short		st_dev;

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	short		__pad1;

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#else

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	compat_dev_t	st_dev;

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#endif

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	compat_ino_t	st_ino;

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	compat_mode_t	st_mode;

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	compat_ushort_t	st_nlink;

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	__compat_uid16_t	st_uid;

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	__compat_gid16_t	st_gid;

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#ifdef __AARCH64EB__

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	short		st_rdev;

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	short		__pad2;

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#else

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	compat_dev_t	st_rdev;

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#endif

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	compat_off_t	st_size;

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	compat_off_t	st_blksize;

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	compat_off_t	st_blocks;

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	old_time32_t	st_atime;

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	compat_ulong_t	st_atime_nsec;

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	old_time32_t	st_mtime;

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	compat_ulong_t	st_mtime_nsec;

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	old_time32_t	st_ctime;

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	compat_ulong_t	st_ctime_nsec;

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	compat_ulong_t	__unused4[2];

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};

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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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#define compat_user_stack_pointer() (user_stack_pointer(task_pt_regs(current)))

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#define COMPAT_MINSIGSTKSZ	2048

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static inline int is_compat_task(void)

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{

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	return test_thread_flag(TIF_32BIT);

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}

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static inline int is_compat_thread(struct thread_info *thread)

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{

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	return test_ti_thread_flag(thread, TIF_32BIT);

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}

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long compat_arm_syscall(struct pt_regs *regs, int scno);

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#else /* !CONFIG_COMPAT */

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static inline int is_compat_thread(struct thread_info *thread)

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{

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	return 0;

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}

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#endif /* CONFIG_COMPAT */

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#endif /* __ASM_COMPAT_H */

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