[mirror_ubuntu-bionic-kernel.git] / arch / mips / include / asm / compat.h

/* SPDX-License-Identifier: GPL-2.0 */
#ifndef _ASM_COMPAT_H
#define _ASM_COMPAT_H
/*
 * Architecture specific compatibility types
 */
#include <linux/thread_info.h>
#include <linux/types.h>
#include <asm/page.h>
#include <asm/ptrace.h>

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

typedef u32		compat_size_t;
typedef s32		compat_ssize_t;
typedef s32		compat_time_t;
typedef s32		compat_clock_t;
typedef s32		compat_suseconds_t;

typedef s32		compat_pid_t;
typedef s32		__compat_uid_t;
typedef s32		__compat_gid_t;
typedef __compat_uid_t	__compat_uid32_t;
typedef __compat_gid_t	__compat_gid32_t;
typedef u32		compat_mode_t;
typedef u32		compat_ino_t;
typedef u32		compat_dev_t;
typedef s32		compat_off_t;
typedef s64		compat_loff_t;
typedef u32		compat_nlink_t;
typedef s32		compat_ipc_pid_t;
typedef s32		compat_daddr_t;
typedef s32		compat_caddr_t;
typedef struct {
	s32	val[2];
} compat_fsid_t;
typedef s32		compat_timer_t;
typedef s32		compat_key_t;

typedef s32		compat_int_t;
typedef s32		compat_long_t;
typedef s64		compat_s64;
typedef u32		compat_uint_t;
typedef u32		compat_ulong_t;
typedef u64		compat_u64;
typedef u32		compat_uptr_t;

struct compat_timespec {
	compat_time_t	tv_sec;
	s32		tv_nsec;
};

struct compat_timeval {
	compat_time_t	tv_sec;
	s32		tv_usec;
};

struct compat_stat {
	compat_dev_t	st_dev;
	s32		st_pad1[3];
	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;
	s32		st_pad2[2];
	compat_off_t	st_size;
	s32		st_pad3;
	compat_time_t	st_atime;
	s32		st_atime_nsec;
	compat_time_t	st_mtime;
	s32		st_mtime_nsec;
	compat_time_t	st_ctime;
	s32		st_ctime_nsec;
	s32		st_blksize;
	s32		st_blocks;
	s32		st_pad4[14];
};

struct compat_flock {
	short		l_type;
	short		l_whence;
	compat_off_t	l_start;
	compat_off_t	l_len;
	s32		l_sysid;
	compat_pid_t	l_pid;
	short		__unused;
	s32		pad[4];
};

#define F_GETLK64	33
#define F_SETLK64	34
#define F_SETLKW64	35

struct compat_flock64 {
	short		l_type;
	short		l_whence;
	compat_loff_t	l_start;
	compat_loff_t	l_len;
	compat_pid_t	l_pid;
};

struct compat_statfs {
	int		f_type;
	int		f_bsize;
	int		f_frsize;
	int		f_blocks;
	int		f_bfree;
	int		f_files;
	int		f_ffree;
	int		f_bavail;
	compat_fsid_t	f_fsid;
	int		f_namelen;
	int		f_flags;
	int		f_spare[5];
};

#define COMPAT_RLIM_INFINITY	0x7fffffffUL

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

#define _COMPAT_NSIG		128		/* Don't ask !$@#% ...	*/
#define _COMPAT_NSIG_BPW	32

typedef u32		compat_sigset_word;

typedef union compat_sigval {
	compat_int_t	sival_int;
	compat_uptr_t	sival_ptr;
} compat_sigval_t;

/* Can't use the generic version because si_code and si_errno are swapped */

#define SI_PAD_SIZE32	(128/sizeof(int) - 3)

typedef struct compat_siginfo {
	int si_signo;
	int si_code;
	int si_errno;

	union {
		int _pad[128 / sizeof(int) - 3];

		/* kill() */
		struct {
			compat_pid_t _pid;	/* sender's pid */
			__compat_uid32_t _uid;	/* sender's uid */
		} _kill;

		/* POSIX.1b timers */
		struct {
			compat_timer_t _tid;	/* timer id */
			int _overrun;		/* overrun count */
			compat_sigval_t _sigval;	/* same as below */
		} _timer;

		/* POSIX.1b signals */
		struct {
			compat_pid_t _pid;	/* sender's pid */
			__compat_uid32_t _uid;	/* sender's uid */
			compat_sigval_t _sigval;
		} _rt;

		/* SIGCHLD */
		struct {
			compat_pid_t _pid;	/* which child */
			__compat_uid32_t _uid;	/* sender's uid */
			int _status;		/* exit code */
			compat_clock_t _utime;
			compat_clock_t _stime;
		} _sigchld;

		/* SIGILL, SIGFPE, SIGSEGV, SIGBUS */
		struct {
			compat_uptr_t _addr;	/* faulting insn/memory ref. */
#ifdef __ARCH_SI_TRAPNO
			int _trapno;	/* TRAP # which caused the signal */
#endif
			short _addr_lsb; /* LSB of the reported address */
			struct {
				compat_uptr_t _lower;
				compat_uptr_t _upper;
			} _addr_bnd;
		} _sigfault;

		/* SIGPOLL */
		struct {
			compat_long_t _band; /* POLL_IN, POLL_OUT, POLL_MSG */
			int _fd;
		} _sigpoll;

		struct {
			compat_uptr_t _call_addr; /* calling insn */
			int _syscall;	/* triggering system call number */
			compat_uint_t _arch;	/* AUDIT_ARCH_* of syscall */
		} _sigsys;
	} _sifields;
} compat_siginfo_t;

#define COMPAT_OFF_T_MAX	0x7fffffff
#define COMPAT_LOFF_T_MAX	0x7fffffffffffffffL

/*
 * A pointer passed in from user mode. This should not
 * be used for syscall parameters, just declare them
 * as pointers because the syscall entry code will have
 * appropriately converted them already.
 */

static inline void __user *compat_ptr(compat_uptr_t uptr)
{
	/* cast to a __user pointer via "unsigned long" makes sparse happy */
	return (void __user *)(unsigned long)(long)uptr;
}

static inline compat_uptr_t ptr_to_compat(void __user *uptr)
{
	return (u32)(unsigned long)uptr;
}

static inline void __user *arch_compat_alloc_user_space(long len)
{
	struct pt_regs *regs = (struct pt_regs *)
		((unsigned long) current_thread_info() + THREAD_SIZE - 32) - 1;

	return (void __user *) (regs->regs[29] - len);
}

struct compat_ipc64_perm {
	compat_key_t key;
	__compat_uid32_t uid;
	__compat_gid32_t gid;
	__compat_uid32_t cuid;
	__compat_gid32_t cgid;
	compat_mode_t mode;
	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_time_t	sem_otime;
	compat_time_t	sem_ctime;
	compat_ulong_t	sem_nsems;
	compat_ulong_t	__unused1;
	compat_ulong_t	__unused2;
};

struct compat_msqid64_ds {
	struct compat_ipc64_perm msg_perm;
#ifndef CONFIG_CPU_LITTLE_ENDIAN
	compat_ulong_t	__unused1;
#endif
	compat_time_t	msg_stime;
#ifdef CONFIG_CPU_LITTLE_ENDIAN
	compat_ulong_t	__unused1;
#endif
#ifndef CONFIG_CPU_LITTLE_ENDIAN
	compat_ulong_t	__unused2;
#endif
	compat_time_t	msg_rtime;
#ifdef CONFIG_CPU_LITTLE_ENDIAN
	compat_ulong_t	__unused2;
#endif
#ifndef CONFIG_CPU_LITTLE_ENDIAN
	compat_ulong_t	__unused3;
#endif
	compat_time_t	msg_ctime;
#ifdef CONFIG_CPU_LITTLE_ENDIAN
	compat_ulong_t	__unused3;
#endif
	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_time_t	shm_atime;
	compat_time_t	shm_dtime;
	compat_time_t	shm_ctime;
	compat_pid_t	shm_cpid;
	compat_pid_t	shm_lpid;
	compat_ulong_t	shm_nattch;
	compat_ulong_t	__unused1;
	compat_ulong_t	__unused2;
};

/* MIPS has unusual order of fields in stack_t */
typedef struct compat_sigaltstack {
	compat_uptr_t			ss_sp;
	compat_size_t			ss_size;
	int				ss_flags;
} compat_stack_t;
#define compat_sigaltstack compat_sigaltstack

static inline int is_compat_task(void)
{
	return test_thread_flag(TIF_32BIT_ADDR);
}

#endif /* _ASM_COMPAT_H */
Commit	Line	Data
b2441318	1	/* SPDX-License-Identifier: GPL-2.0 */
1da177e4 LT	2	#ifndef _ASM_COMPAT_H
	3	#define _ASM_COMPAT_H
	4	/*
	5	* Architecture specific compatibility types
	6	*/
4302e5d5	7	#include <linux/thread_info.h>
1da177e4 LT	8	#include <linux/types.h>
1da177e4 LT	9	#include <asm/page.h>
b7237825	10	#include <asm/ptrace.h>
1da177e4	11
e28cbf22 CH	12	#define COMPAT_USER_HZ 100
e28cbf22 CH	13	#define COMPAT_UTS_MACHINE "mips\0\0\0"
1da177e4 LT	14
	15	typedef u32 compat_size_t;
	16	typedef s32 compat_ssize_t;
	17	typedef s32 compat_time_t;
	18	typedef s32 compat_clock_t;
	19	typedef s32 compat_suseconds_t;
	20
	21	typedef s32 compat_pid_t;
4ee1303a RB	22	typedef s32 __compat_uid_t;
	23	typedef s32 __compat_gid_t;
	24	typedef __compat_uid_t __compat_uid32_t;
	25	typedef __compat_gid_t __compat_gid32_t;
1da177e4 LT	26	typedef u32 compat_mode_t;
	27	typedef u32 compat_ino_t;
	28	typedef u32 compat_dev_t;
	29	typedef s32 compat_off_t;
	30	typedef s64 compat_loff_t;
	31	typedef u32 compat_nlink_t;
	32	typedef s32 compat_ipc_pid_t;
	33	typedef s32 compat_daddr_t;
	34	typedef s32 compat_caddr_t;
	35	typedef struct {
	36	s32 val[2];
	37	} compat_fsid_t;
0d77e5a2	38	typedef s32 compat_timer_t;
05e43966	39	typedef s32 compat_key_t;
1da177e4 LT	40
	41	typedef s32 compat_int_t;
	42	typedef s32 compat_long_t;
4b777587	43	typedef s64 compat_s64;
1da177e4 LT	44	typedef u32 compat_uint_t;
1da177e4 LT	45	typedef u32 compat_ulong_t;
4b777587	46	typedef u64 compat_u64;
751f409d	47	typedef u32 compat_uptr_t;
1da177e4 LT	48
	49	struct compat_timespec {
	50	compat_time_t tv_sec;
	51	s32 tv_nsec;
	52	};
	53
	54	struct compat_timeval {
	55	compat_time_t tv_sec;
	56	s32 tv_usec;
	57	};
	58
	59	struct compat_stat {
	60	compat_dev_t st_dev;
	61	s32 st_pad1[3];
	62	compat_ino_t st_ino;
	63	compat_mode_t st_mode;
	64	compat_nlink_t st_nlink;
4ee1303a RB	65	__compat_uid_t st_uid;
4ee1303a RB	66	__compat_gid_t st_gid;
1da177e4 LT	67	compat_dev_t st_rdev;
	68	s32 st_pad2[2];
	69	compat_off_t st_size;
	70	s32 st_pad3;
	71	compat_time_t st_atime;
	72	s32 st_atime_nsec;
	73	compat_time_t st_mtime;
	74	s32 st_mtime_nsec;
	75	compat_time_t st_ctime;
	76	s32 st_ctime_nsec;
	77	s32 st_blksize;
	78	s32 st_blocks;
	79	s32 st_pad4[14];
	80	};
	81
	82	struct compat_flock {
	83	short l_type;
	84	short l_whence;
	85	compat_off_t l_start;
	86	compat_off_t l_len;
	87	s32 l_sysid;
	88	compat_pid_t l_pid;
	89	short __unused;
	90	s32 pad[4];
	91	};
	92
	93	#define F_GETLK64 33
	94	#define F_SETLK64 34
	95	#define F_SETLKW64 35
	96
	97	struct compat_flock64 {
	98	short l_type;
	99	short l_whence;
	100	compat_loff_t l_start;
	101	compat_loff_t l_len;
	102	compat_pid_t l_pid;
	103	};
	104
	105	struct compat_statfs {
	106	int f_type;
	107	int f_bsize;
	108	int f_frsize;
	109	int f_blocks;
	110	int f_bfree;
	111	int f_files;
	112	int f_ffree;
	113	int f_bavail;
	114	compat_fsid_t f_fsid;
	115	int f_namelen;
1448c721 EB	116	int f_flags;
1448c721 EB	117	int f_spare[5];
1da177e4 LT	118	};
	119
	120	#define COMPAT_RLIM_INFINITY 0x7fffffffUL
	121
	122	typedef u32 compat_old_sigset_t; /* at least 32 bits */
	123
70342287	124	#define _COMPAT_NSIG 128 /* Don't ask !$@#% ... */
1da177e4 LT	125	#define _COMPAT_NSIG_BPW 32
	126
	127	typedef u32 compat_sigset_word;
	128
751f409d DV	129	typedef union compat_sigval {
	130	compat_int_t sival_int;
	131	compat_uptr_t sival_ptr;
	132	} compat_sigval_t;
	133
d00d9203 AA	134	/* Can't use the generic version because si_code and si_errno are swapped */
d00d9203 AA	135
751f409d DV	136	#define SI_PAD_SIZE32 (128/sizeof(int) - 3)
	137
	138	typedef struct compat_siginfo {
	139	int si_signo;
	140	int si_code;
	141	int si_errno;
	142
	143	union {
d00d9203	144	int _pad[128 / sizeof(int) - 3];
751f409d DV	145
	146	/* kill() */
	147	struct {
	148	compat_pid_t _pid; /* sender's pid */
d00d9203	149	__compat_uid32_t _uid; /* sender's uid */
751f409d DV	150	} _kill;
751f409d DV	151
d00d9203 AA	152	/* POSIX.1b timers */
	153	struct {
	154	compat_timer_t _tid; /* timer id */
	155	int _overrun; /* overrun count */
	156	compat_sigval_t _sigval; /* same as below */
	157	} _timer;
	158
	159	/* POSIX.1b signals */
	160	struct {
	161	compat_pid_t _pid; /* sender's pid */
	162	__compat_uid32_t _uid; /* sender's uid */
	163	compat_sigval_t _sigval;
	164	} _rt;
	165
751f409d DV	166	/* SIGCHLD */
	167	struct {
	168	compat_pid_t _pid; /* which child */
d00d9203	169	__compat_uid32_t _uid; /* sender's uid */
751f409d DV	170	int _status; /* exit code */
	171	compat_clock_t _utime;
	172	compat_clock_t _stime;
	173	} _sigchld;
	174
751f409d DV	175	/* SIGILL, SIGFPE, SIGSEGV, SIGBUS */
751f409d DV	176	struct {
d00d9203 AA	177	compat_uptr_t _addr; /* faulting insn/memory ref. */
	178	#ifdef __ARCH_SI_TRAPNO
	179	int _trapno; /* TRAP # which caused the signal */
	180	#endif
	181	short _addr_lsb; /* LSB of the reported address */
	182	struct {
	183	compat_uptr_t _lower;
	184	compat_uptr_t _upper;
	185	} _addr_bnd;
751f409d DV	186	} _sigfault;
751f409d DV	187
d00d9203	188	/* SIGPOLL */
751f409d	189	struct {
d00d9203	190	compat_long_t _band; /* POLL_IN, POLL_OUT, POLL_MSG */
751f409d DV	191	int _fd;
	192	} _sigpoll;
	193
751f409d	194	struct {
d00d9203 AA	195	compat_uptr_t _call_addr; /* calling insn */
	196	int _syscall; /* triggering system call number */
	197	compat_uint_t _arch; /* AUDIT_ARCH_* of syscall */
	198	} _sigsys;
751f409d DV	199	} _sifields;
	200	} compat_siginfo_t;
	201
1da177e4 LT	202	#define COMPAT_OFF_T_MAX 0x7fffffff
	203	#define COMPAT_LOFF_T_MAX 0x7fffffffffffffffL
	204
	205	/*
	206	* A pointer passed in from user mode. This should not
	207	* be used for syscall parameters, just declare them
	208	* as pointers because the syscall entry code will have
8b3de0df	209	* appropriately converted them already.
1da177e4	210	*/
1da177e4	211
219ac73a	212	static inline void __user *compat_ptr(compat_uptr_t uptr)
1da177e4	213	{
01bebc66 AN	214	/* cast to a __user pointer via "unsigned long" makes sparse happy */
01bebc66 AN	215	return (void __user *)(unsigned long)(long)uptr;
1da177e4 LT	216	}
1da177e4 LT	217
62ac285f IM	218	static inline compat_uptr_t ptr_to_compat(void __user *uptr)
	219	{
	220	return (u32)(unsigned long)uptr;
	221	}
	222
c41d68a5	223	static inline void __user *arch_compat_alloc_user_space(long len)
1da177e4 LT	224	{
	225	struct pt_regs regs = (struct pt_regs )
	226	((unsigned long) current_thread_info() + THREAD_SIZE - 32) - 1;
	227
219ac73a	228	return (void __user *) (regs->regs[29] - len);
1da177e4	229	}
1da177e4	230
05e43966 AN	231	struct compat_ipc64_perm {
	232	compat_key_t key;
	233	__compat_uid32_t uid;
	234	__compat_gid32_t gid;
	235	__compat_uid32_t cuid;
	236	__compat_gid32_t cgid;
	237	compat_mode_t mode;
	238	unsigned short seq;
	239	unsigned short __pad2;
	240	compat_ulong_t __unused1;
	241	compat_ulong_t __unused2;
	242	};
	243
	244	struct compat_semid64_ds {
	245	struct compat_ipc64_perm sem_perm;
	246	compat_time_t sem_otime;
	247	compat_time_t sem_ctime;
	248	compat_ulong_t sem_nsems;
	249	compat_ulong_t __unused1;
	250	compat_ulong_t __unused2;
	251	};
	252
	253	struct compat_msqid64_ds {
	254	struct compat_ipc64_perm msg_perm;
	255	#ifndef CONFIG_CPU_LITTLE_ENDIAN
	256	compat_ulong_t __unused1;
	257	#endif
	258	compat_time_t msg_stime;
	259	#ifdef CONFIG_CPU_LITTLE_ENDIAN
	260	compat_ulong_t __unused1;
	261	#endif
	262	#ifndef CONFIG_CPU_LITTLE_ENDIAN
	263	compat_ulong_t __unused2;
	264	#endif
	265	compat_time_t msg_rtime;
	266	#ifdef CONFIG_CPU_LITTLE_ENDIAN
	267	compat_ulong_t __unused2;
	268	#endif
	269	#ifndef CONFIG_CPU_LITTLE_ENDIAN
	270	compat_ulong_t __unused3;
	271	#endif
	272	compat_time_t msg_ctime;
	273	#ifdef CONFIG_CPU_LITTLE_ENDIAN
	274	compat_ulong_t __unused3;
	275	#endif
	276	compat_ulong_t msg_cbytes;
	277	compat_ulong_t msg_qnum;
	278	compat_ulong_t msg_qbytes;
	279	compat_pid_t msg_lspid;
	280	compat_pid_t msg_lrpid;
	281	compat_ulong_t __unused4;
	282	compat_ulong_t __unused5;
	283	};
	284
	285	struct compat_shmid64_ds {
	286	struct compat_ipc64_perm shm_perm;
	287	compat_size_t shm_segsz;
	288	compat_time_t shm_atime;
	289	compat_time_t shm_dtime;
	290	compat_time_t shm_ctime;
	291	compat_pid_t shm_cpid;
	292	compat_pid_t shm_lpid;
	293	compat_ulong_t shm_nattch;
	294	compat_ulong_t __unused1;
295	compat_ulong_t __unused2;
296	};
297
ea536ad4 AV	298	/* MIPS has unusual order of fields in stack_t */
	299	typedef struct compat_sigaltstack {
	300	compat_uptr_t ss_sp;
	301	compat_size_t ss_size;
	302	int ss_flags;
	303	} compat_stack_t;
	304	#define compat_sigaltstack compat_sigaltstack
	305
4302e5d5 RB	306	static inline int is_compat_task(void)
4302e5d5 RB	307	{
6ad560b4	308	return test_thread_flag(TIF_32BIT_ADDR);
4302e5d5 RB	309	}
4302e5d5 RB	310
1da177e4	311	#endif /* _ASM_COMPAT_H */