[linux-2.6-block.git] / arch / x86 / include / asm / compat.h

/* SPDX-License-Identifier: GPL-2.0 */
#ifndef _ASM_X86_COMPAT_H
#define _ASM_X86_COMPAT_H

/*
 * Architecture specific compatibility types
 */
#include <linux/types.h>
#include <linux/sched.h>
#include <linux/sched/task_stack.h>
#include <asm/processor.h>
#include <asm/user32.h>
#include <asm/unistd.h>

#define compat_mode_t	compat_mode_t
typedef u16		compat_mode_t;

#define __compat_uid_t	__compat_uid_t
typedef u16		__compat_uid_t;
typedef u16		__compat_gid_t;

#define compat_dev_t	compat_dev_t
typedef u16		compat_dev_t;

#define compat_ipc_pid_t compat_ipc_pid_t
typedef u16		 compat_ipc_pid_t;

#define compat_statfs	compat_statfs

#include <asm-generic/compat.h>

#define COMPAT_UTS_MACHINE	"i686\0\0"

typedef u16		compat_nlink_t;

struct compat_stat {
	u32		st_dev;
	compat_ino_t	st_ino;
	compat_mode_t	st_mode;
	compat_nlink_t	st_nlink;
	__compat_uid_t	st_uid;
	__compat_gid_t	st_gid;
	u32		st_rdev;
	u32		st_size;
	u32		st_blksize;
	u32		st_blocks;
	u32		st_atime;
	u32		st_atime_nsec;
	u32		st_mtime;
	u32		st_mtime_nsec;
	u32		st_ctime;
	u32		st_ctime_nsec;
	u32		__unused4;
	u32		__unused5;
};

/*
 * IA32 uses 4 byte alignment for 64 bit quantities, so we need to pack the
 * compat flock64 structure.
 */
#define __ARCH_NEED_COMPAT_FLOCK64_PACKED

struct compat_statfs {
	int		f_type;
	int		f_bsize;
	int		f_blocks;
	int		f_bfree;
	int		f_bavail;
	int		f_files;
	int		f_ffree;
	compat_fsid_t	f_fsid;
	int		f_namelen;	/* SunOS ignores this field. */
	int		f_frsize;
	int		f_flags;
	int		f_spare[4];
};

#ifdef CONFIG_X86_X32_ABI
#define COMPAT_USE_64BIT_TIME \
	(!!(task_pt_regs(current)->orig_ax & __X32_SYSCALL_BIT))
#endif

static inline bool in_x32_syscall(void)
{
#ifdef CONFIG_X86_X32_ABI
	if (task_pt_regs(current)->orig_ax & __X32_SYSCALL_BIT)
		return true;
#endif
	return false;
}

static inline bool in_32bit_syscall(void)
{
	return in_ia32_syscall() || in_x32_syscall();
}

#ifdef CONFIG_COMPAT
static inline bool in_compat_syscall(void)
{
	return in_32bit_syscall();
}
#define in_compat_syscall in_compat_syscall	/* override the generic impl */
#define compat_need_64bit_alignment_fixup in_ia32_syscall
#endif

struct compat_siginfo;

#ifdef CONFIG_X86_X32_ABI
int copy_siginfo_to_user32(struct compat_siginfo __user *to,
		const kernel_siginfo_t *from);
#define copy_siginfo_to_user32 copy_siginfo_to_user32
#endif /* CONFIG_X86_X32_ABI */

#endif /* _ASM_X86_COMPAT_H */
Commit	Line	Data
	1	/* SPDX-License-Identifier: GPL-2.0 */
	2	#ifndef _ASM_X86_COMPAT_H
	3	#define _ASM_X86_COMPAT_H
	4
	5	/*
	6	* Architecture specific compatibility types
	7	*/
	8	#include <linux/types.h>
	9	#include <linux/sched.h>
	10	#include <linux/sched/task_stack.h>
	11	#include <asm/processor.h>
	12	#include <asm/user32.h>
	13	#include <asm/unistd.h>
	14
	15	#define compat_mode_t compat_mode_t
	16	typedef u16 compat_mode_t;
	17
	18	#define __compat_uid_t __compat_uid_t
	19	typedef u16 __compat_uid_t;
	20	typedef u16 __compat_gid_t;
	21
	22	#define compat_dev_t compat_dev_t
	23	typedef u16 compat_dev_t;
	24
	25	#define compat_ipc_pid_t compat_ipc_pid_t
	26	typedef u16 compat_ipc_pid_t;
	27
	28	#define compat_statfs compat_statfs
	29
	30	#include <asm-generic/compat.h>
	31
	32	#define COMPAT_UTS_MACHINE "i686\0\0"
	33
	34	typedef u16 compat_nlink_t;
	35
	36	struct compat_stat {
	37	u32 st_dev;
	38	compat_ino_t st_ino;
	39	compat_mode_t st_mode;
	40	compat_nlink_t st_nlink;
	41	__compat_uid_t st_uid;
	42	__compat_gid_t st_gid;
	43	u32 st_rdev;
	44	u32 st_size;
	45	u32 st_blksize;
	46	u32 st_blocks;
	47	u32 st_atime;
	48	u32 st_atime_nsec;
	49	u32 st_mtime;
	50	u32 st_mtime_nsec;
	51	u32 st_ctime;
	52	u32 st_ctime_nsec;
	53	u32 __unused4;
	54	u32 __unused5;
	55	};
	56
	57	/*
	58	* IA32 uses 4 byte alignment for 64 bit quantities, so we need to pack the
	59	* compat flock64 structure.
	60	*/
	61	#define __ARCH_NEED_COMPAT_FLOCK64_PACKED
	62
	63	struct compat_statfs {
	64	int f_type;
	65	int f_bsize;
	66	int f_blocks;
	67	int f_bfree;
	68	int f_bavail;
	69	int f_files;
	70	int f_ffree;
	71	compat_fsid_t f_fsid;
	72	int f_namelen; /* SunOS ignores this field. */
	73	int f_frsize;
	74	int f_flags;
	75	int f_spare[4];
	76	};
	77
	78	#ifdef CONFIG_X86_X32_ABI
	79	#define COMPAT_USE_64BIT_TIME \
	80	(!!(task_pt_regs(current)->orig_ax & __X32_SYSCALL_BIT))
	81	#endif
	82
	83	static inline bool in_x32_syscall(void)
	84	{
	85	#ifdef CONFIG_X86_X32_ABI
	86	if (task_pt_regs(current)->orig_ax & __X32_SYSCALL_BIT)
	87	return true;
	88	#endif
	89	return false;
	90	}
	91
	92	static inline bool in_32bit_syscall(void)
	93	{
	94	return in_ia32_syscall() \|\| in_x32_syscall();
	95	}
	96
	97	#ifdef CONFIG_COMPAT
	98	static inline bool in_compat_syscall(void)
	99	{
	100	return in_32bit_syscall();
	101	}
	102	#define in_compat_syscall in_compat_syscall /* override the generic impl */
	103	#define compat_need_64bit_alignment_fixup in_ia32_syscall
	104	#endif
	105
	106	struct compat_siginfo;
	107
	108	#ifdef CONFIG_X86_X32_ABI
	109	int copy_siginfo_to_user32(struct compat_siginfo __user *to,
	110	const kernel_siginfo_t *from);
	111	#define copy_siginfo_to_user32 copy_siginfo_to_user32
	112	#endif /* CONFIG_X86_X32_ABI */
	113
	114	#endif /* _ASM_X86_COMPAT_H */