[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>

#include <asm-generic/compat.h>

#define COMPAT_USER_HZ		100
#define COMPAT_UTS_MACHINE	"i686\0\0"

typedef u16		__compat_uid_t;
typedef u16		__compat_gid_t;
typedef u32		__compat_uid32_t;
typedef u32		__compat_gid32_t;
typedef u16		compat_mode_t;
typedef u16		compat_dev_t;
typedef u16		compat_nlink_t;
typedef u16		compat_ipc_pid_t;
typedef u32		compat_caddr_t;
typedef __kernel_fsid_t	compat_fsid_t;
typedef s64 __attribute__((aligned(4))) compat_s64;
typedef u64 __attribute__((aligned(4))) compat_u64;

struct compat_stat {
	compat_dev_t	st_dev;
	u16		__pad1;
	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;
	compat_dev_t	st_rdev;
	u16		__pad2;
	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;
};

struct compat_flock {
	short		l_type;
	short		l_whence;
	compat_off_t	l_start;
	compat_off_t	l_len;
	compat_pid_t	l_pid;
};

#define F_GETLK64	12	/*  using 'struct flock64' */
#define F_SETLK64	13
#define F_SETLKW64	14

/*
 * IA32 uses 4 byte alignment for 64 bit quantities,
 * so we need to pack this structure.
 */
struct compat_flock64 {
	short		l_type;
	short		l_whence;
	compat_loff_t	l_start;
	compat_loff_t	l_len;
	compat_pid_t	l_pid;
} __attribute__((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];
};

#define COMPAT_RLIM_INFINITY		0xffffffff

typedef u32		compat_old_sigset_t;	/* at least 32 bits */

#define _COMPAT_NSIG		64
#define _COMPAT_NSIG_BPW	32

typedef u32               compat_sigset_word;

#define COMPAT_OFF_T_MAX	0x7fffffff

struct compat_ipc64_perm {
	compat_key_t key;
	__compat_uid32_t uid;
	__compat_gid32_t gid;
	__compat_uid32_t cuid;
	__compat_gid32_t cgid;
	unsigned short mode;
	unsigned short __pad1;
	unsigned short seq;
	unsigned short __pad2;
	compat_ulong_t unused1;
	compat_ulong_t unused2;
};

struct compat_semid64_ds {
	struct compat_ipc64_perm sem_perm;
	compat_ulong_t sem_otime;
	compat_ulong_t sem_otime_high;
	compat_ulong_t sem_ctime;
	compat_ulong_t sem_ctime_high;
	compat_ulong_t sem_nsems;
	compat_ulong_t __unused3;
	compat_ulong_t __unused4;
};

struct compat_msqid64_ds {
	struct compat_ipc64_perm msg_perm;
	compat_ulong_t msg_stime;
	compat_ulong_t msg_stime_high;
	compat_ulong_t msg_rtime;
	compat_ulong_t msg_rtime_high;
	compat_ulong_t msg_ctime;
	compat_ulong_t msg_ctime_high;
	compat_ulong_t msg_cbytes;
	compat_ulong_t msg_qnum;
	compat_ulong_t msg_qbytes;
	compat_pid_t   msg_lspid;
	compat_pid_t   msg_lrpid;
	compat_ulong_t __unused4;
	compat_ulong_t __unused5;
};

struct compat_shmid64_ds {
	struct compat_ipc64_perm shm_perm;
	compat_size_t  shm_segsz;
	compat_ulong_t shm_atime;
	compat_ulong_t shm_atime_high;
	compat_ulong_t shm_dtime;
	compat_ulong_t shm_dtime_high;
	compat_ulong_t shm_ctime;
	compat_ulong_t shm_ctime_high;
	compat_pid_t   shm_cpid;
	compat_pid_t   shm_lpid;
	compat_ulong_t shm_nattch;
	compat_ulong_t __unused4;
	compat_ulong_t __unused5;
};

/*
 * The type of struct elf_prstatus.pr_reg in compatible core dumps.
 */
typedef struct user_regs_struct compat_elf_gregset_t;

/* Full regset -- prstatus on x32, otherwise on ia32 */
#define PRSTATUS_SIZE(S, R) (R != sizeof(S.pr_reg) ? 144 : 296)
#define SET_PR_FPVALID(S, V, R) \
  do { *(int *) (((void *) &((S)->pr_reg)) + R) = (V); } \
  while (0)

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

static inline void __user *arch_compat_alloc_user_space(long len)
{
	compat_uptr_t sp;

	if (test_thread_flag(TIF_IA32)) {
		sp = task_pt_regs(current)->sp;
	} else {
		/* -128 for the x32 ABI redzone */
		sp = task_pt_regs(current)->sp - 128;
	}

	return (void __user *)round_down(sp - len, 16);
}

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 */
#endif

struct compat_siginfo;
int __copy_siginfo_to_user32(struct compat_siginfo __user *to,
		const kernel_siginfo_t *from, bool x32_ABI);

#endif /* _ASM_X86_COMPAT_H */
Commit	Line	Data
b2441318	1	/* SPDX-License-Identifier: GPL-2.0 */
1965aae3 PA	2	#ifndef _ASM_X86_COMPAT_H
1965aae3 PA	3	#define _ASM_X86_COMPAT_H
1da177e4 LT	4
	5	/*
	6	* Architecture specific compatibility types
	7	*/
	8	#include <linux/types.h>
	9	#include <linux/sched.h>
d375cf15	10	#include <linux/sched/task_stack.h>
d1a797f3	11	#include <asm/processor.h>
95d1b8f9	12	#include <asm/user32.h>
fca460f9	13	#include <asm/unistd.h>
1da177e4	14
fb373975 AB	15	#include <asm-generic/compat.h>
fb373975 AB	16
e28cbf22 CH	17	#define COMPAT_USER_HZ 100
e28cbf22 CH	18	#define COMPAT_UTS_MACHINE "i686\0\0"
1da177e4	19
202e5979 SR	20	typedef u16 __compat_uid_t;
	21	typedef u16 __compat_gid_t;
	22	typedef u32 __compat_uid32_t;
	23	typedef u32 __compat_gid32_t;
1da177e4	24	typedef u16 compat_mode_t;
1da177e4	25	typedef u16 compat_dev_t;
1da177e4 LT	26	typedef u16 compat_nlink_t;
1da177e4 LT	27	typedef u16 compat_ipc_pid_t;
1da177e4 LT	28	typedef u32 compat_caddr_t;
1da177e4 LT	29	typedef __kernel_fsid_t compat_fsid_t;
4b777587	30	typedef s64 __attribute__((aligned(4))) compat_s64;
4b777587	31	typedef u64 __attribute__((aligned(4))) compat_u64;
1da177e4	32
1da177e4 LT	33	struct compat_stat {
	34	compat_dev_t st_dev;
	35	u16 __pad1;
	36	compat_ino_t st_ino;
	37	compat_mode_t st_mode;
	38	compat_nlink_t st_nlink;
202e5979 SR	39	__compat_uid_t st_uid;
202e5979 SR	40	__compat_gid_t st_gid;
1da177e4 LT	41	compat_dev_t st_rdev;
	42	u16 __pad2;
	43	u32 st_size;
	44	u32 st_blksize;
	45	u32 st_blocks;
	46	u32 st_atime;
	47	u32 st_atime_nsec;
	48	u32 st_mtime;
	49	u32 st_mtime_nsec;
	50	u32 st_ctime;
	51	u32 st_ctime_nsec;
	52	u32 __unused4;
	53	u32 __unused5;
	54	};
	55
	56	struct compat_flock {
	57	short l_type;
	58	short l_whence;
	59	compat_off_t l_start;
	60	compat_off_t l_len;
	61	compat_pid_t l_pid;
	62	};
	63
	64	#define F_GETLK64 12 /* using 'struct flock64' */
	65	#define F_SETLK64 13
	66	#define F_SETLKW64 14
	67
	68	/*
	69	* IA32 uses 4 byte alignment for 64 bit quantities,
	70	* so we need to pack this structure.
	71	*/
	72	struct compat_flock64 {
	73	short l_type;
	74	short l_whence;
	75	compat_loff_t l_start;
	76	compat_loff_t l_len;
	77	compat_pid_t l_pid;
	78	} __attribute__((packed));
	79
	80	struct compat_statfs {
	81	int f_type;
	82	int f_bsize;
	83	int f_blocks;
	84	int f_bfree;
	85	int f_bavail;
	86	int f_files;
	87	int f_ffree;
	88	compat_fsid_t f_fsid;
	89	int f_namelen; /* SunOS ignores this field. */
	90	int f_frsize;
1448c721 EB	91	int f_flags;
1448c721 EB	92	int f_spare[4];
1da177e4 LT	93	};
1da177e4 LT	94
1da177e4 LT	95	#define COMPAT_RLIM_INFINITY 0xffffffff
	96
	97	typedef u32 compat_old_sigset_t; /* at least 32 bits */
	98
	99	#define _COMPAT_NSIG 64
	100	#define _COMPAT_NSIG_BPW 32
	101
	102	typedef u32 compat_sigset_word;
	103
	104	#define COMPAT_OFF_T_MAX 0x7fffffff
1da177e4 LT	105
	106	struct compat_ipc64_perm {
	107	compat_key_t key;
202e5979 SR	108	__compat_uid32_t uid;
	109	__compat_gid32_t gid;
	110	__compat_uid32_t cuid;
	111	__compat_gid32_t cgid;
1da177e4 LT	112	unsigned short mode;
	113	unsigned short __pad1;
	114	unsigned short seq;
	115	unsigned short __pad2;
	116	compat_ulong_t unused1;
	117	compat_ulong_t unused2;
	118	};
	119
	120	struct compat_semid64_ds {
	121	struct compat_ipc64_perm sem_perm;
c039dbd5 AB	122	compat_ulong_t sem_otime;
	123	compat_ulong_t sem_otime_high;
	124	compat_ulong_t sem_ctime;
	125	compat_ulong_t sem_ctime_high;
1da177e4 LT	126	compat_ulong_t sem_nsems;
	127	compat_ulong_t __unused3;
	128	compat_ulong_t __unused4;
	129	};
	130
	131	struct compat_msqid64_ds {
	132	struct compat_ipc64_perm msg_perm;
c039dbd5 AB	133	compat_ulong_t msg_stime;
	134	compat_ulong_t msg_stime_high;
	135	compat_ulong_t msg_rtime;
	136	compat_ulong_t msg_rtime_high;
	137	compat_ulong_t msg_ctime;
	138	compat_ulong_t msg_ctime_high;
1da177e4 LT	139	compat_ulong_t msg_cbytes;
	140	compat_ulong_t msg_qnum;
	141	compat_ulong_t msg_qbytes;
	142	compat_pid_t msg_lspid;
	143	compat_pid_t msg_lrpid;
	144	compat_ulong_t __unused4;
	145	compat_ulong_t __unused5;
	146	};
	147
	148	struct compat_shmid64_ds {
	149	struct compat_ipc64_perm shm_perm;
	150	compat_size_t shm_segsz;
c039dbd5 AB	151	compat_ulong_t shm_atime;
	152	compat_ulong_t shm_atime_high;
	153	compat_ulong_t shm_dtime;
	154	compat_ulong_t shm_dtime_high;
	155	compat_ulong_t shm_ctime;
	156	compat_ulong_t shm_ctime_high;
1da177e4 LT	157	compat_pid_t shm_cpid;
	158	compat_pid_t shm_lpid;
	159	compat_ulong_t shm_nattch;
	160	compat_ulong_t __unused4;
	161	compat_ulong_t __unused5;
	162	};
	163
95d1b8f9 RM	164	/*
	165	* The type of struct elf_prstatus.pr_reg in compatible core dumps.
	166	*/
d1a797f3 PA	167	typedef struct user_regs_struct compat_elf_gregset_t;
d1a797f3 PA	168
90954e7b DS	169	/* Full regset -- prstatus on x32, otherwise on ia32 */
	170	#define PRSTATUS_SIZE(S, R) (R != sizeof(S.pr_reg) ? 144 : 296)
	171	#define SET_PR_FPVALID(S, V, R) \
	172	do { (int ) (((void *) &((S)->pr_reg)) + R) = (V); } \
d1a797f3 PA	173	while (0)
d1a797f3 PA	174
7b2dd368	175	#ifdef CONFIG_X86_X32_ABI
d1a797f3 PA	176	#define COMPAT_USE_64BIT_TIME \
d1a797f3 PA	177	(!!(task_pt_regs(current)->orig_ax & __X32_SYSCALL_BIT))
d1a797f3	178	#endif
95d1b8f9	179
c41d68a5	180	static inline void __user *arch_compat_alloc_user_space(long len)
1da177e4	181	{
d1a797f3 PA	182	compat_uptr_t sp;
	183
	184	if (test_thread_flag(TIF_IA32)) {
	185	sp = task_pt_regs(current)->sp;
	186	} else {
	187	/* -128 for the x32 ABI redzone */
263042e4	188	sp = task_pt_regs(current)->sp - 128;
d1a797f3 PA	189	}
	190
	191	return (void __user *)round_down(sp - len, 16);
1da177e4 LT	192	}
1da177e4 LT	193
abfb9498	194	static inline bool in_x32_syscall(void)
a628b684	195	{
fca460f9 PA	196	#ifdef CONFIG_X86_X32_ABI
	197	if (task_pt_regs(current)->orig_ax & __X32_SYSCALL_BIT)
	198	return true;
	199	#endif
	200	return false;
bf2fcc6f AK	201	}
bf2fcc6f AK	202
a846446b	203	static inline bool in_32bit_syscall(void)
a628b684	204	{
abfb9498	205	return in_ia32_syscall() \|\| in_x32_syscall();
a628b684	206	}
a846446b DS	207
	208	#ifdef CONFIG_COMPAT
	209	static inline bool in_compat_syscall(void)
	210	{
	211	return in_32bit_syscall();
	212	}
f970165b	213	#define in_compat_syscall in_compat_syscall /* override the generic impl */
a846446b	214	#endif
a628b684	215
ea64d5ac EB	216	struct compat_siginfo;
ea64d5ac EB	217	int __copy_siginfo_to_user32(struct compat_siginfo __user *to,
ae7795bc	218	const kernel_siginfo_t *from, bool x32_ABI);
ea64d5ac	219
1965aae3	220	#endif /* _ASM_X86_COMPAT_H */