arch/x86/include/asm/compat.h - arm/linux - Git at Google

 /* 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 */
	/* 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 */