Release 4.8 arch/x86/include/asm/compat.h

#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_OLD_INFINITY	0x7fffffff

#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.
 */
#ifdef CONFIG_X86_X32_ABI

typedef struct user_regs_struct compat_elf_gregset_t;


#define PR_REG_SIZE(S) (test_thread_flag(TIF_IA32) ? 68 : 216)

#define PRSTATUS_SIZE(S) (test_thread_flag(TIF_IA32) ? 144 : 296)

#define SET_PR_FPVALID(S,V) \
  do { *(int *) (((void *) &((S)->pr_reg)) + PR_REG_SIZE(0)) = (V); } \
  while (0)


#define COMPAT_USE_64BIT_TIME \
	(!!(task_pt_regs(current)->orig_ax & __X32_SYSCALL_BIT))
#else

typedef struct user_regs_struct32 compat_elf_gregset_t;
#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;
}

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

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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);
}

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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;
}

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static inline bool in_compat_syscall(void)
{
	return in_ia32_syscall() || in_x32_syscall();
}
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#define in_compat_syscall in_compat_syscall	
/* override the generic impl */

#endif /* _ASM_X86_COMPAT_H */
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Directory: arch/x86/include/asm

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