[mirror_ubuntu-disco-kernel.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 <asm/processor.h>
#include <asm/user32.h>
#include <asm/unistd.h>

#define COMPAT_USER_HZ		100
#define COMPAT_UTS_MACHINE	"i686\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_pid_t;
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 u32		compat_ino_t;
typedef u16		compat_dev_t;
typedef s32		compat_off_t;
typedef s64		compat_loff_t;
typedef u16		compat_nlink_t;
typedef u16		compat_ipc_pid_t;
typedef s32		compat_daddr_t;
typedef u32		compat_caddr_t;
typedef __kernel_fsid_t	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 __attribute__((aligned(4))) compat_s64;
typedef u32		compat_uint_t;
typedef u32		compat_ulong_t;
typedef u32		compat_u32;
typedef u64 __attribute__((aligned(4))) 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;
	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;

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

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

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

		/* kill() */
		struct {
			unsigned int _pid;	/* sender's pid */
			unsigned int _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 */
			int _sys_private;	/* not to be passed to user */
			int _overrun_incr;	/* amount to add to overrun */
		} _timer;

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

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

		/* SIGCHLD (x32 version) */
		struct {
			unsigned int _pid;	/* which child */
			unsigned int _uid;	/* sender's uid */
			int _status;		/* exit code */
			compat_s64 _utime;
			compat_s64 _stime;
		} _sigchld_x32;

		/* SIGILL, SIGFPE, SIGSEGV, SIGBUS */
		struct {
			unsigned int _addr;	/* faulting insn/memory ref. */
			short int _addr_lsb;	/* Valid LSB of the reported address. */
			union {
				/* used when si_code=SEGV_BNDERR */
				struct {
					compat_uptr_t _lower;
					compat_uptr_t _upper;
				} _addr_bnd;
				/* used when si_code=SEGV_PKUERR */
				compat_u32 _pkey;
			};
		} _sigfault;

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

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

#define COMPAT_OFF_T_MAX	0x7fffffff
#define COMPAT_LOFF_T_MAX	0x7fffffffffffffffL

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_time_t  sem_otime;
	compat_ulong_t __unused1;
	compat_time_t  sem_ctime;
	compat_ulong_t __unused2;
	compat_ulong_t sem_nsems;
	compat_ulong_t __unused3;
	compat_ulong_t __unused4;
};

struct compat_msqid64_ds {
	struct compat_ipc64_perm msg_perm;
	compat_time_t  msg_stime;
	compat_ulong_t __unused1;
	compat_time_t  msg_rtime;
	compat_ulong_t __unused2;
	compat_time_t  msg_ctime;
	compat_ulong_t __unused3;
	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_ulong_t __unused1;
	compat_time_t  shm_dtime;
	compat_ulong_t __unused2;
	compat_time_t  shm_ctime;
	compat_ulong_t __unused3;
	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

/*
 * 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)
{
	return (void __user *)(unsigned 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)
{
	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_compat_syscall(void)
{
	return in_ia32_syscall() || in_x32_syscall();
}
#define in_compat_syscall in_compat_syscall	/* override the generic impl */

#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>
d1a797f3	10	#include <asm/processor.h>
95d1b8f9	11	#include <asm/user32.h>
fca460f9	12	#include <asm/unistd.h>
1da177e4	13
e28cbf22 CH	14	#define COMPAT_USER_HZ 100
e28cbf22 CH	15	#define COMPAT_UTS_MACHINE "i686\0\0"
1da177e4 LT	16
	17	typedef u32 compat_size_t;
	18	typedef s32 compat_ssize_t;
	19	typedef s32 compat_time_t;
	20	typedef s32 compat_clock_t;
	21	typedef s32 compat_pid_t;
202e5979 SR	22	typedef u16 __compat_uid_t;
	23	typedef u16 __compat_gid_t;
	24	typedef u32 __compat_uid32_t;
	25	typedef u32 __compat_gid32_t;
1da177e4 LT	26	typedef u16 compat_mode_t;
	27	typedef u32 compat_ino_t;
	28	typedef u16 compat_dev_t;
	29	typedef s32 compat_off_t;
	30	typedef s64 compat_loff_t;
	31	typedef u16 compat_nlink_t;
	32	typedef u16 compat_ipc_pid_t;
	33	typedef s32 compat_daddr_t;
	34	typedef u32 compat_caddr_t;
	35	typedef __kernel_fsid_t compat_fsid_t;
	36	typedef s32 compat_timer_t;
	37	typedef s32 compat_key_t;
	38
	39	typedef s32 compat_int_t;
	40	typedef s32 compat_long_t;
4b777587	41	typedef s64 __attribute__((aligned(4))) compat_s64;
1da177e4 LT	42	typedef u32 compat_uint_t;
1da177e4 LT	43	typedef u32 compat_ulong_t;
a4455082	44	typedef u32 compat_u32;
4b777587	45	typedef u64 __attribute__((aligned(4))) compat_u64;
751f409d	46	typedef u32 compat_uptr_t;
1da177e4 LT	47
	48	struct compat_timespec {
	49	compat_time_t tv_sec;
	50	s32 tv_nsec;
	51	};
	52
	53	struct compat_timeval {
	54	compat_time_t tv_sec;
	55	s32 tv_usec;
	56	};
	57
	58	struct compat_stat {
	59	compat_dev_t st_dev;
	60	u16 __pad1;
	61	compat_ino_t st_ino;
	62	compat_mode_t st_mode;
	63	compat_nlink_t st_nlink;
202e5979 SR	64	__compat_uid_t st_uid;
202e5979 SR	65	__compat_gid_t st_gid;
1da177e4 LT	66	compat_dev_t st_rdev;
	67	u16 __pad2;
	68	u32 st_size;
	69	u32 st_blksize;
	70	u32 st_blocks;
	71	u32 st_atime;
	72	u32 st_atime_nsec;
	73	u32 st_mtime;
	74	u32 st_mtime_nsec;
	75	u32 st_ctime;
	76	u32 st_ctime_nsec;
	77	u32 __unused4;
	78	u32 __unused5;
	79	};
	80
	81	struct compat_flock {
	82	short l_type;
	83	short l_whence;
	84	compat_off_t l_start;
	85	compat_off_t l_len;
	86	compat_pid_t l_pid;
	87	};
	88
	89	#define F_GETLK64 12 /* using 'struct flock64' */
	90	#define F_SETLK64 13
	91	#define F_SETLKW64 14
	92
	93	/*
	94	* IA32 uses 4 byte alignment for 64 bit quantities,
	95	* so we need to pack this structure.
	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	} __attribute__((packed));
	104
	105	struct compat_statfs {
	106	int f_type;
	107	int f_bsize;
	108	int f_blocks;
	109	int f_bfree;
	110	int f_bavail;
	111	int f_files;
	112	int f_ffree;
	113	compat_fsid_t f_fsid;
	114	int f_namelen; /* SunOS ignores this field. */
	115	int f_frsize;
1448c721 EB	116	int f_flags;
1448c721 EB	117	int f_spare[4];
1da177e4 LT	118	};
1da177e4 LT	119
1da177e4 LT	120	#define COMPAT_RLIM_INFINITY 0xffffffff
	121
	122	typedef u32 compat_old_sigset_t; /* at least 32 bits */
	123
	124	#define _COMPAT_NSIG 64
	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
	134	typedef struct compat_siginfo {
	135	int si_signo;
	136	int si_errno;
	137	int si_code;
	138
	139	union {
	140	int _pad[128/sizeof(int) - 3];
	141
	142	/* kill() */
	143	struct {
	144	unsigned int _pid; /* sender's pid */
	145	unsigned int _uid; /* sender's uid */
	146	} _kill;
	147
	148	/* POSIX.1b timers */
	149	struct {
	150	compat_timer_t _tid; /* timer id */
	151	int _overrun; /* overrun count */
	152	compat_sigval_t _sigval; /* same as below */
	153	int _sys_private; /* not to be passed to user */
	154	int _overrun_incr; /* amount to add to overrun */
	155	} _timer;
	156
	157	/* POSIX.1b signals */
	158	struct {
	159	unsigned int _pid; /* sender's pid */
	160	unsigned int _uid; /* sender's uid */
	161	compat_sigval_t _sigval;
	162	} _rt;
	163
	164	/* SIGCHLD */
	165	struct {
	166	unsigned int _pid; /* which child */
	167	unsigned int _uid; /* sender's uid */
	168	int _status; /* exit code */
	169	compat_clock_t _utime;
	170	compat_clock_t _stime;
	171	} _sigchld;
	172
	173	/* SIGCHLD (x32 version) */
	174	struct {
	175	unsigned int _pid; /* which child */
	176	unsigned int _uid; /* sender's uid */
	177	int _status; /* exit code */
	178	compat_s64 _utime;
	179	compat_s64 _stime;
	180	} _sigchld_x32;
	181
	182	/* SIGILL, SIGFPE, SIGSEGV, SIGBUS */
	183	struct {
	184	unsigned int _addr; /* faulting insn/memory ref. */
a4455082 DH	185	short int _addr_lsb; /* Valid LSB of the reported address. */
	186	union {
	187	/* used when si_code=SEGV_BNDERR */
	188	struct {
	189	compat_uptr_t _lower;
	190	compat_uptr_t _upper;
	191	} _addr_bnd;
	192	/* used when si_code=SEGV_PKUERR */
	193	compat_u32 _pkey;
	194	};
751f409d DV	195	} _sigfault;
	196
	197	/* SIGPOLL */
	198	struct {
	199	int _band; /* POLL_IN, POLL_OUT, POLL_MSG */
	200	int _fd;
	201	} _sigpoll;
	202
	203	struct {
	204	unsigned int _call_addr; /* calling insn */
	205	int _syscall; /* triggering system call number */
	206	unsigned int _arch; /* AUDIT_ARCH_* of syscall */
	207	} _sigsys;
	208	} _sifields;
	209	} compat_siginfo_t;
	210
1da177e4 LT	211	#define COMPAT_OFF_T_MAX 0x7fffffff
	212	#define COMPAT_LOFF_T_MAX 0x7fffffffffffffffL
	213
	214	struct compat_ipc64_perm {
	215	compat_key_t key;
202e5979 SR	216	__compat_uid32_t uid;
	217	__compat_gid32_t gid;
	218	__compat_uid32_t cuid;
	219	__compat_gid32_t cgid;
1da177e4 LT	220	unsigned short mode;
	221	unsigned short __pad1;
	222	unsigned short seq;
	223	unsigned short __pad2;
	224	compat_ulong_t unused1;
	225	compat_ulong_t unused2;
	226	};
	227
	228	struct compat_semid64_ds {
	229	struct compat_ipc64_perm sem_perm;
	230	compat_time_t sem_otime;
	231	compat_ulong_t __unused1;
	232	compat_time_t sem_ctime;
	233	compat_ulong_t __unused2;
	234	compat_ulong_t sem_nsems;
	235	compat_ulong_t __unused3;
	236	compat_ulong_t __unused4;
	237	};
	238
	239	struct compat_msqid64_ds {
	240	struct compat_ipc64_perm msg_perm;
	241	compat_time_t msg_stime;
	242	compat_ulong_t __unused1;
	243	compat_time_t msg_rtime;
	244	compat_ulong_t __unused2;
	245	compat_time_t msg_ctime;
	246	compat_ulong_t __unused3;
	247	compat_ulong_t msg_cbytes;
	248	compat_ulong_t msg_qnum;
	249	compat_ulong_t msg_qbytes;
	250	compat_pid_t msg_lspid;
	251	compat_pid_t msg_lrpid;
	252	compat_ulong_t __unused4;
	253	compat_ulong_t __unused5;
	254	};
	255
	256	struct compat_shmid64_ds {
	257	struct compat_ipc64_perm shm_perm;
	258	compat_size_t shm_segsz;
	259	compat_time_t shm_atime;
	260	compat_ulong_t __unused1;
	261	compat_time_t shm_dtime;
	262	compat_ulong_t __unused2;
	263	compat_time_t shm_ctime;
	264	compat_ulong_t __unused3;
	265	compat_pid_t shm_cpid;
	266	compat_pid_t shm_lpid;
	267	compat_ulong_t shm_nattch;
	268	compat_ulong_t __unused4;
	269	compat_ulong_t __unused5;
	270	};
	271
95d1b8f9 RM	272	/*
	273	* The type of struct elf_prstatus.pr_reg in compatible core dumps.
	274	*/
d1a797f3 PA	275	typedef struct user_regs_struct compat_elf_gregset_t;
d1a797f3 PA	276
90954e7b DS	277	/* Full regset -- prstatus on x32, otherwise on ia32 */
	278	#define PRSTATUS_SIZE(S, R) (R != sizeof(S.pr_reg) ? 144 : 296)
	279	#define SET_PR_FPVALID(S, V, R) \
	280	do { (int ) (((void *) &((S)->pr_reg)) + R) = (V); } \
d1a797f3 PA	281	while (0)
d1a797f3 PA	282
7b2dd368	283	#ifdef CONFIG_X86_X32_ABI
d1a797f3 PA	284	#define COMPAT_USE_64BIT_TIME \
d1a797f3 PA	285	(!!(task_pt_regs(current)->orig_ax & __X32_SYSCALL_BIT))
d1a797f3	286	#endif
95d1b8f9	287
1da177e4 LT	288	/*
	289	* A pointer passed in from user mode. This should not
	290	* be used for syscall parameters, just declare them
	291	* as pointers because the syscall entry code will have
8b3de0df	292	* appropriately converted them already.
1da177e4	293	*/
1da177e4 LT	294
	295	static inline void __user *compat_ptr(compat_uptr_t uptr)
	296	{
	297	return (void __user *)(unsigned long)uptr;
	298	}
	299
	300	static inline compat_uptr_t ptr_to_compat(void __user *uptr)
	301	{
	302	return (u32)(unsigned long)uptr;
	303	}
	304
c41d68a5	305	static inline void __user *arch_compat_alloc_user_space(long len)
1da177e4	306	{
d1a797f3 PA	307	compat_uptr_t sp;
	308
	309	if (test_thread_flag(TIF_IA32)) {
	310	sp = task_pt_regs(current)->sp;
	311	} else {
	312	/* -128 for the x32 ABI redzone */
263042e4	313	sp = task_pt_regs(current)->sp - 128;
d1a797f3 PA	314	}
	315
	316	return (void __user *)round_down(sp - len, 16);
1da177e4 LT	317	}
1da177e4 LT	318
abfb9498	319	static inline bool in_x32_syscall(void)
a628b684	320	{
fca460f9 PA	321	#ifdef CONFIG_X86_X32_ABI
	322	if (task_pt_regs(current)->orig_ax & __X32_SYSCALL_BIT)
	323	return true;
	324	#endif
	325	return false;
bf2fcc6f AK	326	}
bf2fcc6f AK	327
f970165b	328	static inline bool in_compat_syscall(void)
a628b684	329	{
abfb9498	330	return in_ia32_syscall() \|\| in_x32_syscall();
a628b684	331	}
f970165b	332	#define in_compat_syscall in_compat_syscall /* override the generic impl */
a628b684	333
1965aae3	334	#endif /* _ASM_X86_COMPAT_H */