[mirror_ubuntu-jammy-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 <linux/sched/task_stack.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;

#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_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 */

struct compat_siginfo;
int __copy_siginfo_to_user32(struct compat_siginfo __user *to,
		const 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
e28cbf22 CH	15	#define COMPAT_USER_HZ 100
e28cbf22 CH	16	#define COMPAT_UTS_MACHINE "i686\0\0"
1da177e4 LT	17
	18	typedef u32 compat_size_t;
	19	typedef s32 compat_ssize_t;
	20	typedef s32 compat_time_t;
	21	typedef s32 compat_clock_t;
	22	typedef s32 compat_pid_t;
202e5979 SR	23	typedef u16 __compat_uid_t;
	24	typedef u16 __compat_gid_t;
	25	typedef u32 __compat_uid32_t;
	26	typedef u32 __compat_gid32_t;
1da177e4 LT	27	typedef u16 compat_mode_t;
	28	typedef u32 compat_ino_t;
	29	typedef u16 compat_dev_t;
	30	typedef s32 compat_off_t;
	31	typedef s64 compat_loff_t;
	32	typedef u16 compat_nlink_t;
	33	typedef u16 compat_ipc_pid_t;
	34	typedef s32 compat_daddr_t;
	35	typedef u32 compat_caddr_t;
	36	typedef __kernel_fsid_t compat_fsid_t;
	37	typedef s32 compat_timer_t;
	38	typedef s32 compat_key_t;
	39
	40	typedef s32 compat_int_t;
	41	typedef s32 compat_long_t;
4b777587	42	typedef s64 __attribute__((aligned(4))) compat_s64;
1da177e4 LT	43	typedef u32 compat_uint_t;
1da177e4 LT	44	typedef u32 compat_ulong_t;
a4455082	45	typedef u32 compat_u32;
4b777587	46	typedef u64 __attribute__((aligned(4))) 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	u16 __pad1;
	62	compat_ino_t st_ino;
	63	compat_mode_t st_mode;
	64	compat_nlink_t st_nlink;
202e5979 SR	65	__compat_uid_t st_uid;
202e5979 SR	66	__compat_gid_t st_gid;
1da177e4 LT	67	compat_dev_t st_rdev;
	68	u16 __pad2;
	69	u32 st_size;
	70	u32 st_blksize;
	71	u32 st_blocks;
	72	u32 st_atime;
	73	u32 st_atime_nsec;
	74	u32 st_mtime;
	75	u32 st_mtime_nsec;
	76	u32 st_ctime;
	77	u32 st_ctime_nsec;
	78	u32 __unused4;
	79	u32 __unused5;
	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	compat_pid_t l_pid;
	88	};
	89
	90	#define F_GETLK64 12 /* using 'struct flock64' */
	91	#define F_SETLK64 13
	92	#define F_SETLKW64 14
	93
	94	/*
	95	* IA32 uses 4 byte alignment for 64 bit quantities,
	96	* so we need to pack this structure.
	97	*/
	98	struct compat_flock64 {
	99	short l_type;
	100	short l_whence;
	101	compat_loff_t l_start;
	102	compat_loff_t l_len;
	103	compat_pid_t l_pid;
	104	} __attribute__((packed));
	105
	106	struct compat_statfs {
	107	int f_type;
	108	int f_bsize;
	109	int f_blocks;
	110	int f_bfree;
	111	int f_bavail;
	112	int f_files;
	113	int f_ffree;
	114	compat_fsid_t f_fsid;
	115	int f_namelen; /* SunOS ignores this field. */
	116	int f_frsize;
1448c721 EB	117	int f_flags;
1448c721 EB	118	int f_spare[4];
1da177e4 LT	119	};
1da177e4 LT	120
1da177e4 LT	121	#define COMPAT_RLIM_INFINITY 0xffffffff
	122
	123	typedef u32 compat_old_sigset_t; /* at least 32 bits */
	124
	125	#define _COMPAT_NSIG 64
	126	#define _COMPAT_NSIG_BPW 32
	127
	128	typedef u32 compat_sigset_word;
	129
	130	#define COMPAT_OFF_T_MAX 0x7fffffff
1da177e4 LT	131
	132	struct compat_ipc64_perm {
	133	compat_key_t key;
202e5979 SR	134	__compat_uid32_t uid;
	135	__compat_gid32_t gid;
	136	__compat_uid32_t cuid;
	137	__compat_gid32_t cgid;
1da177e4 LT	138	unsigned short mode;
	139	unsigned short __pad1;
	140	unsigned short seq;
	141	unsigned short __pad2;
	142	compat_ulong_t unused1;
	143	compat_ulong_t unused2;
	144	};
	145
	146	struct compat_semid64_ds {
	147	struct compat_ipc64_perm sem_perm;
	148	compat_time_t sem_otime;
	149	compat_ulong_t __unused1;
	150	compat_time_t sem_ctime;
	151	compat_ulong_t __unused2;
	152	compat_ulong_t sem_nsems;
	153	compat_ulong_t __unused3;
	154	compat_ulong_t __unused4;
	155	};
	156
	157	struct compat_msqid64_ds {
	158	struct compat_ipc64_perm msg_perm;
	159	compat_time_t msg_stime;
	160	compat_ulong_t __unused1;
	161	compat_time_t msg_rtime;
	162	compat_ulong_t __unused2;
	163	compat_time_t msg_ctime;
	164	compat_ulong_t __unused3;
	165	compat_ulong_t msg_cbytes;
	166	compat_ulong_t msg_qnum;
	167	compat_ulong_t msg_qbytes;
	168	compat_pid_t msg_lspid;
	169	compat_pid_t msg_lrpid;
	170	compat_ulong_t __unused4;
	171	compat_ulong_t __unused5;
	172	};
	173
	174	struct compat_shmid64_ds {
	175	struct compat_ipc64_perm shm_perm;
	176	compat_size_t shm_segsz;
	177	compat_time_t shm_atime;
	178	compat_ulong_t __unused1;
	179	compat_time_t shm_dtime;
	180	compat_ulong_t __unused2;
	181	compat_time_t shm_ctime;
	182	compat_ulong_t __unused3;
	183	compat_pid_t shm_cpid;
	184	compat_pid_t shm_lpid;
	185	compat_ulong_t shm_nattch;
	186	compat_ulong_t __unused4;
	187	compat_ulong_t __unused5;
	188	};
	189
95d1b8f9 RM	190	/*
	191	* The type of struct elf_prstatus.pr_reg in compatible core dumps.
	192	*/
d1a797f3 PA	193	typedef struct user_regs_struct compat_elf_gregset_t;
d1a797f3 PA	194
90954e7b DS	195	/* Full regset -- prstatus on x32, otherwise on ia32 */
	196	#define PRSTATUS_SIZE(S, R) (R != sizeof(S.pr_reg) ? 144 : 296)
	197	#define SET_PR_FPVALID(S, V, R) \
	198	do { (int ) (((void *) &((S)->pr_reg)) + R) = (V); } \
d1a797f3 PA	199	while (0)
d1a797f3 PA	200
7b2dd368	201	#ifdef CONFIG_X86_X32_ABI
d1a797f3 PA	202	#define COMPAT_USE_64BIT_TIME \
d1a797f3 PA	203	(!!(task_pt_regs(current)->orig_ax & __X32_SYSCALL_BIT))
d1a797f3	204	#endif
95d1b8f9	205
1da177e4 LT	206	/*
	207	* A pointer passed in from user mode. This should not
	208	* be used for syscall parameters, just declare them
	209	* as pointers because the syscall entry code will have
8b3de0df	210	* appropriately converted them already.
1da177e4	211	*/
1da177e4 LT	212
	213	static inline void __user *compat_ptr(compat_uptr_t uptr)
	214	{
	215	return (void __user *)(unsigned long)uptr;
	216	}
	217
	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	224	{
d1a797f3 PA	225	compat_uptr_t sp;
	226
	227	if (test_thread_flag(TIF_IA32)) {
	228	sp = task_pt_regs(current)->sp;
	229	} else {
	230	/* -128 for the x32 ABI redzone */
263042e4	231	sp = task_pt_regs(current)->sp - 128;
d1a797f3 PA	232	}
	233
	234	return (void __user *)round_down(sp - len, 16);
1da177e4 LT	235	}
1da177e4 LT	236
abfb9498	237	static inline bool in_x32_syscall(void)
a628b684	238	{
fca460f9 PA	239	#ifdef CONFIG_X86_X32_ABI
	240	if (task_pt_regs(current)->orig_ax & __X32_SYSCALL_BIT)
	241	return true;
	242	#endif
	243	return false;
bf2fcc6f AK	244	}
bf2fcc6f AK	245
f970165b	246	static inline bool in_compat_syscall(void)
a628b684	247	{
abfb9498	248	return in_ia32_syscall() \|\| in_x32_syscall();
a628b684	249	}
f970165b	250	#define in_compat_syscall in_compat_syscall /* override the generic impl */
a628b684	251
ea64d5ac EB	252	struct compat_siginfo;
	253	int __copy_siginfo_to_user32(struct compat_siginfo __user *to,
	254	const siginfo_t *from, bool x32_ABI);
	255
1965aae3	256	#endif /* _ASM_X86_COMPAT_H */