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kernel-fxtec-pro1x/include/linux/compat.h
Will Deacon 5445a4b0ff signal: Introduce COMPAT_SIGMINSTKSZ for use in compat_sys_sigaltstack 
[ Upstream commit 22839869f21ab3850fbbac9b425ccc4c0023926f ]

The sigaltstack(2) system call fails with -ENOMEM if the new alternative
signal stack is found to be smaller than SIGMINSTKSZ. On architectures
such as arm64, where the native value for SIGMINSTKSZ is larger than
the compat value, this can result in an unexpected error being reported
to a compat task. See, for example:

  https://bugs.debian.org/cgi-bin/bugreport.cgi?bug=904385

This patch fixes the problem by extending do_sigaltstack to take the
minimum signal stack size as an additional parameter, allowing the
native and compat system call entry code to pass in their respective
values. COMPAT_SIGMINSTKSZ is just defined as SIGMINSTKSZ if it has not
been defined by the architecture.

Cc: Arnd Bergmann <arnd@arndb.de>
Cc: Dominik Brodowski <linux@dominikbrodowski.net>
Cc: "Eric W. Biederman" <ebiederm@xmission.com>
Cc: Andrew Morton <akpm@linux-foundation.org>
Cc: Al Viro <viro@zeniv.linux.org.uk>
Cc: Oleg Nesterov <oleg@redhat.com>
Reported-by: Steve McIntyre <steve.mcintyre@arm.com>
Tested-by: Steve McIntyre <93sam@debian.org>
Signed-off-by: Will Deacon <will.deacon@arm.com>
Signed-off-by: Catalin Marinas <catalin.marinas@arm.com>
Signed-off-by: Sasha Levin <sashal@kernel.org>
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
2018-11-13 11:08:25 -08:00

1045 lines
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/* SPDX-License-Identifier: GPL-2.0 */
#ifndef _LINUX_COMPAT_H
#define _LINUX_COMPAT_H
/*
* These are the type definitions for the architecture specific
* syscall compatibility layer.
*/
#include <linux/types.h>
#include <linux/compat_time.h>
#include <linux/stat.h>
#include <linux/param.h> /* for HZ */
#include <linux/sem.h>
#include <linux/socket.h>
#include <linux/if.h>
#include <linux/fs.h>
#include <linux/aio_abi.h> /* for aio_context_t */
#include <linux/uaccess.h>
#include <linux/unistd.h>
#include <asm/compat.h>
#ifdef CONFIG_COMPAT
#include <asm/siginfo.h>
#include <asm/signal.h>
#endif
#ifdef CONFIG_ARCH_HAS_SYSCALL_WRAPPER
/*
* It may be useful for an architecture to override the definitions of the
* COMPAT_SYSCALL_DEFINE0 and COMPAT_SYSCALL_DEFINEx() macros, in particular
* to use a different calling convention for syscalls. To allow for that,
+ the prototypes for the compat_sys_*() functions below will *not* be included
* if CONFIG_ARCH_HAS_SYSCALL_WRAPPER is enabled.
*/
#include <asm/syscall_wrapper.h>
#endif /* CONFIG_ARCH_HAS_SYSCALL_WRAPPER */
#ifndef COMPAT_USE_64BIT_TIME
#define COMPAT_USE_64BIT_TIME 0
#endif
#ifndef __SC_DELOUSE
#define __SC_DELOUSE(t,v) ((__force t)(unsigned long)(v))
#endif
#ifndef COMPAT_SYSCALL_DEFINE0
#define COMPAT_SYSCALL_DEFINE0(name) \
asmlinkage long compat_sys_##name(void); \
ALLOW_ERROR_INJECTION(compat_sys_##name, ERRNO); \
asmlinkage long compat_sys_##name(void)
#endif /* COMPAT_SYSCALL_DEFINE0 */
#define COMPAT_SYSCALL_DEFINE1(name, ...) \
COMPAT_SYSCALL_DEFINEx(1, _##name, __VA_ARGS__)
#define COMPAT_SYSCALL_DEFINE2(name, ...) \
COMPAT_SYSCALL_DEFINEx(2, _##name, __VA_ARGS__)
#define COMPAT_SYSCALL_DEFINE3(name, ...) \
COMPAT_SYSCALL_DEFINEx(3, _##name, __VA_ARGS__)
#define COMPAT_SYSCALL_DEFINE4(name, ...) \
COMPAT_SYSCALL_DEFINEx(4, _##name, __VA_ARGS__)
#define COMPAT_SYSCALL_DEFINE5(name, ...) \
COMPAT_SYSCALL_DEFINEx(5, _##name, __VA_ARGS__)
#define COMPAT_SYSCALL_DEFINE6(name, ...) \
COMPAT_SYSCALL_DEFINEx(6, _##name, __VA_ARGS__)
/*
* The asmlinkage stub is aliased to a function named __se_compat_sys_*() which
* sign-extends 32-bit ints to longs whenever needed. The actual work is
* done within __do_compat_sys_*().
*/
#ifndef COMPAT_SYSCALL_DEFINEx
#define COMPAT_SYSCALL_DEFINEx(x, name, ...) \
__diag_push(); \
__diag_ignore(GCC, 8, "-Wattribute-alias", \
"Type aliasing is used to sanitize syscall arguments");\
asmlinkage long compat_sys##name(__MAP(x,__SC_DECL,__VA_ARGS__)); \
asmlinkage long compat_sys##name(__MAP(x,__SC_DECL,__VA_ARGS__)) \
__attribute__((alias(__stringify(__se_compat_sys##name)))); \
ALLOW_ERROR_INJECTION(compat_sys##name, ERRNO); \
static inline long __do_compat_sys##name(__MAP(x,__SC_DECL,__VA_ARGS__));\
asmlinkage long __se_compat_sys##name(__MAP(x,__SC_LONG,__VA_ARGS__)); \
asmlinkage long __se_compat_sys##name(__MAP(x,__SC_LONG,__VA_ARGS__)) \
{ \
long ret = __do_compat_sys##name(__MAP(x,__SC_DELOUSE,__VA_ARGS__));\
__MAP(x,__SC_TEST,__VA_ARGS__); \
return ret; \
} \
__diag_pop(); \
static inline long __do_compat_sys##name(__MAP(x,__SC_DECL,__VA_ARGS__))
#endif /* COMPAT_SYSCALL_DEFINEx */
#ifdef CONFIG_COMPAT
#ifndef compat_user_stack_pointer
#define compat_user_stack_pointer() current_user_stack_pointer()
#endif
#ifndef compat_sigaltstack /* we'll need that for MIPS */
typedef struct compat_sigaltstack {
compat_uptr_t ss_sp;
int ss_flags;
compat_size_t ss_size;
} compat_stack_t;
#endif
#ifndef COMPAT_MINSIGSTKSZ
#define COMPAT_MINSIGSTKSZ MINSIGSTKSZ
#endif
#define compat_jiffies_to_clock_t(x) \
(((unsigned long)(x) * COMPAT_USER_HZ) / HZ)
typedef __compat_uid32_t compat_uid_t;
typedef __compat_gid32_t compat_gid_t;
typedef compat_ulong_t compat_aio_context_t;
struct compat_sel_arg_struct;
struct rusage;
struct compat_utimbuf {
compat_time_t actime;
compat_time_t modtime;
};
struct compat_itimerval {
struct compat_timeval it_interval;
struct compat_timeval it_value;
};
struct itimerval;
int get_compat_itimerval(struct itimerval *, const struct compat_itimerval __user *);
int put_compat_itimerval(struct compat_itimerval __user *, const struct itimerval *);
struct compat_tms {
compat_clock_t tms_utime;
compat_clock_t tms_stime;
compat_clock_t tms_cutime;
compat_clock_t tms_cstime;
};
struct compat_timex {
compat_uint_t modes;
compat_long_t offset;
compat_long_t freq;
compat_long_t maxerror;
compat_long_t esterror;
compat_int_t status;
compat_long_t constant;
compat_long_t precision;
compat_long_t tolerance;
struct compat_timeval time;
compat_long_t tick;
compat_long_t ppsfreq;
compat_long_t jitter;
compat_int_t shift;
compat_long_t stabil;
compat_long_t jitcnt;
compat_long_t calcnt;
compat_long_t errcnt;
compat_long_t stbcnt;
compat_int_t tai;
compat_int_t:32; compat_int_t:32; compat_int_t:32; compat_int_t:32;
compat_int_t:32; compat_int_t:32; compat_int_t:32; compat_int_t:32;
compat_int_t:32; compat_int_t:32; compat_int_t:32;
};
struct timex;
int compat_get_timex(struct timex *, const struct compat_timex __user *);
int compat_put_timex(struct compat_timex __user *, const struct timex *);
#define _COMPAT_NSIG_WORDS (_COMPAT_NSIG / _COMPAT_NSIG_BPW)
typedef struct {
compat_sigset_word sig[_COMPAT_NSIG_WORDS];
} compat_sigset_t;
struct compat_sigaction {
#ifndef __ARCH_HAS_IRIX_SIGACTION
compat_uptr_t sa_handler;
compat_ulong_t sa_flags;
#else
compat_uint_t sa_flags;
compat_uptr_t sa_handler;
#endif
#ifdef __ARCH_HAS_SA_RESTORER
compat_uptr_t sa_restorer;
#endif
compat_sigset_t sa_mask __packed;
};
typedef union compat_sigval {
compat_int_t sival_int;
compat_uptr_t sival_ptr;
} compat_sigval_t;
typedef struct compat_siginfo {
int si_signo;
#ifndef __ARCH_HAS_SWAPPED_SIGINFO
int si_errno;
int si_code;
#else
int si_code;
int si_errno;
#endif
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;
#ifdef CONFIG_X86_X32_ABI
/* SIGCHLD (x32 version) */
struct {
compat_pid_t _pid; /* which child */
__compat_uid32_t _uid; /* sender's uid */
int _status; /* exit code */
compat_s64 _utime;
compat_s64 _stime;
} _sigchld_x32;
#endif
/* SIGILL, SIGFPE, SIGSEGV, SIGBUS, SIGTRAP, SIGEMT */
struct {
compat_uptr_t _addr; /* faulting insn/memory ref. */
#ifdef __ARCH_SI_TRAPNO
int _trapno; /* TRAP # which caused the signal */
#endif
#define __COMPAT_ADDR_BND_PKEY_PAD (__alignof__(compat_uptr_t) < sizeof(short) ? \
sizeof(short) : __alignof__(compat_uptr_t))
union {
/*
* used when si_code=BUS_MCEERR_AR or
* used when si_code=BUS_MCEERR_AO
*/
short int _addr_lsb; /* Valid LSB of the reported address. */
/* used when si_code=SEGV_BNDERR */
struct {
char _dummy_bnd[__COMPAT_ADDR_BND_PKEY_PAD];
compat_uptr_t _lower;
compat_uptr_t _upper;
} _addr_bnd;
/* used when si_code=SEGV_PKUERR */
struct {
char _dummy_pkey[__COMPAT_ADDR_BND_PKEY_PAD];
u32 _pkey;
} _addr_pkey;
};
} _sigfault;
/* SIGPOLL */
struct {
compat_long_t _band; /* POLL_IN, POLL_OUT, POLL_MSG */
int _fd;
} _sigpoll;
struct {
compat_uptr_t _call_addr; /* calling user insn */
int _syscall; /* triggering system call number */
unsigned int _arch; /* AUDIT_ARCH_* of syscall */
} _sigsys;
} _sifields;
} compat_siginfo_t;
/*
* These functions operate on 32- or 64-bit specs depending on
* COMPAT_USE_64BIT_TIME, hence the void user pointer arguments.
*/
extern int compat_get_timespec(struct timespec *, const void __user *);
extern int compat_put_timespec(const struct timespec *, void __user *);
extern int compat_get_timeval(struct timeval *, const void __user *);
extern int compat_put_timeval(const struct timeval *, void __user *);
struct compat_iovec {
compat_uptr_t iov_base;
compat_size_t iov_len;
};
struct compat_rlimit {
compat_ulong_t rlim_cur;
compat_ulong_t rlim_max;
};
struct compat_rusage {
struct compat_timeval ru_utime;
struct compat_timeval ru_stime;
compat_long_t ru_maxrss;
compat_long_t ru_ixrss;
compat_long_t ru_idrss;
compat_long_t ru_isrss;
compat_long_t ru_minflt;
compat_long_t ru_majflt;
compat_long_t ru_nswap;
compat_long_t ru_inblock;
compat_long_t ru_oublock;
compat_long_t ru_msgsnd;
compat_long_t ru_msgrcv;
compat_long_t ru_nsignals;
compat_long_t ru_nvcsw;
compat_long_t ru_nivcsw;
};
extern int put_compat_rusage(const struct rusage *,
struct compat_rusage __user *);
struct compat_siginfo;
struct __compat_aio_sigset;
struct compat_dirent {
u32 d_ino;
compat_off_t d_off;
u16 d_reclen;
char d_name[256];
};
struct compat_ustat {
compat_daddr_t f_tfree;
compat_ino_t f_tinode;
char f_fname[6];
char f_fpack[6];
};
#define COMPAT_SIGEV_PAD_SIZE ((SIGEV_MAX_SIZE/sizeof(int)) - 3)
typedef struct compat_sigevent {
compat_sigval_t sigev_value;
compat_int_t sigev_signo;
compat_int_t sigev_notify;
union {
compat_int_t _pad[COMPAT_SIGEV_PAD_SIZE];
compat_int_t _tid;
struct {
compat_uptr_t _function;
compat_uptr_t _attribute;
} _sigev_thread;
} _sigev_un;
} compat_sigevent_t;
struct compat_ifmap {
compat_ulong_t mem_start;
compat_ulong_t mem_end;
unsigned short base_addr;
unsigned char irq;
unsigned char dma;
unsigned char port;
};
struct compat_if_settings {
unsigned int type; /* Type of physical device or protocol */
unsigned int size; /* Size of the data allocated by the caller */
compat_uptr_t ifs_ifsu; /* union of pointers */
};
struct compat_ifreq {
union {
char ifrn_name[IFNAMSIZ]; /* if name, e.g. "en0" */
} ifr_ifrn;
union {
struct sockaddr ifru_addr;
struct sockaddr ifru_dstaddr;
struct sockaddr ifru_broadaddr;
struct sockaddr ifru_netmask;
struct sockaddr ifru_hwaddr;
short ifru_flags;
compat_int_t ifru_ivalue;
compat_int_t ifru_mtu;
struct compat_ifmap ifru_map;
char ifru_slave[IFNAMSIZ]; /* Just fits the size */
char ifru_newname[IFNAMSIZ];
compat_caddr_t ifru_data;
struct compat_if_settings ifru_settings;
} ifr_ifru;
};
struct compat_ifconf {
compat_int_t ifc_len; /* size of buffer */
compat_caddr_t ifcbuf;
};
struct compat_robust_list {
compat_uptr_t next;
};
struct compat_robust_list_head {
struct compat_robust_list list;
compat_long_t futex_offset;
compat_uptr_t list_op_pending;
};
#ifdef CONFIG_COMPAT_OLD_SIGACTION
struct compat_old_sigaction {
compat_uptr_t sa_handler;
compat_old_sigset_t sa_mask;
compat_ulong_t sa_flags;
compat_uptr_t sa_restorer;
};
#endif
struct compat_keyctl_kdf_params {
compat_uptr_t hashname;
compat_uptr_t otherinfo;
__u32 otherinfolen;
__u32 __spare[8];
};
struct compat_statfs;
struct compat_statfs64;
struct compat_old_linux_dirent;
struct compat_linux_dirent;
struct linux_dirent64;
struct compat_msghdr;
struct compat_mmsghdr;
struct compat_sysinfo;
struct compat_sysctl_args;
struct compat_kexec_segment;
struct compat_mq_attr;
struct compat_msgbuf;
extern void compat_exit_robust_list(struct task_struct *curr);
#define BITS_PER_COMPAT_LONG (8*sizeof(compat_long_t))
#define BITS_TO_COMPAT_LONGS(bits) DIV_ROUND_UP(bits, BITS_PER_COMPAT_LONG)
long compat_get_bitmap(unsigned long *mask, const compat_ulong_t __user *umask,
unsigned long bitmap_size);
long compat_put_bitmap(compat_ulong_t __user *umask, unsigned long *mask,
unsigned long bitmap_size);
int copy_siginfo_from_user32(siginfo_t *to, const struct compat_siginfo __user *from);
int copy_siginfo_to_user32(struct compat_siginfo __user *to, const siginfo_t *from);
int get_compat_sigevent(struct sigevent *event,
const struct compat_sigevent __user *u_event);
static inline int compat_timeval_compare(struct compat_timeval *lhs,
struct compat_timeval *rhs)
{
if (lhs->tv_sec < rhs->tv_sec)
return -1;
if (lhs->tv_sec > rhs->tv_sec)
return 1;
return lhs->tv_usec - rhs->tv_usec;
}
static inline int compat_timespec_compare(struct compat_timespec *lhs,
struct compat_timespec *rhs)
{
if (lhs->tv_sec < rhs->tv_sec)
return -1;
if (lhs->tv_sec > rhs->tv_sec)
return 1;
return lhs->tv_nsec - rhs->tv_nsec;
}
extern int get_compat_sigset(sigset_t *set, const compat_sigset_t __user *compat);
/*
* Defined inline such that size can be compile time constant, which avoids
* CONFIG_HARDENED_USERCOPY complaining about copies from task_struct
*/
static inline int
put_compat_sigset(compat_sigset_t __user *compat, const sigset_t *set,
unsigned int size)
{
/* size <= sizeof(compat_sigset_t) <= sizeof(sigset_t) */
#ifdef __BIG_ENDIAN
compat_sigset_t v;
switch (_NSIG_WORDS) {
case 4: v.sig[7] = (set->sig[3] >> 32); v.sig[6] = set->sig[3];
case 3: v.sig[5] = (set->sig[2] >> 32); v.sig[4] = set->sig[2];
case 2: v.sig[3] = (set->sig[1] >> 32); v.sig[2] = set->sig[1];
case 1: v.sig[1] = (set->sig[0] >> 32); v.sig[0] = set->sig[0];
}
return copy_to_user(compat, &v, size) ? -EFAULT : 0;
#else
return copy_to_user(compat, set, size) ? -EFAULT : 0;
#endif
}
extern int compat_ptrace_request(struct task_struct *child,
compat_long_t request,
compat_ulong_t addr, compat_ulong_t data);
extern long compat_arch_ptrace(struct task_struct *child, compat_long_t request,
compat_ulong_t addr, compat_ulong_t data);
struct epoll_event; /* fortunately, this one is fixed-layout */
extern ssize_t compat_rw_copy_check_uvector(int type,
const struct compat_iovec __user *uvector,
unsigned long nr_segs,
unsigned long fast_segs, struct iovec *fast_pointer,
struct iovec **ret_pointer);
extern void __user *compat_alloc_user_space(unsigned long len);
int compat_restore_altstack(const compat_stack_t __user *uss);
int __compat_save_altstack(compat_stack_t __user *, unsigned long);
#define compat_save_altstack_ex(uss, sp) do { \
compat_stack_t __user *__uss = uss; \
struct task_struct *t = current; \
put_user_ex(ptr_to_compat((void __user *)t->sas_ss_sp), &__uss->ss_sp); \
put_user_ex(t->sas_ss_flags, &__uss->ss_flags); \
put_user_ex(t->sas_ss_size, &__uss->ss_size); \
if (t->sas_ss_flags & SS_AUTODISARM) \
sas_ss_reset(t); \
} while (0);
/*
* These syscall function prototypes are kept in the same order as
* include/uapi/asm-generic/unistd.h. Deprecated or obsolete system calls
* go below.
*
* Please note that these prototypes here are only provided for information
* purposes, for static analysis, and for linking from the syscall table.
* These functions should not be called elsewhere from kernel code.
*
* As the syscall calling convention may be different from the default
* for architectures overriding the syscall calling convention, do not
* include the prototypes if CONFIG_ARCH_HAS_SYSCALL_WRAPPER is enabled.
*/
#ifndef CONFIG_ARCH_HAS_SYSCALL_WRAPPER
asmlinkage long compat_sys_io_setup(unsigned nr_reqs, u32 __user *ctx32p);
asmlinkage long compat_sys_io_submit(compat_aio_context_t ctx_id, int nr,
u32 __user *iocb);
asmlinkage long compat_sys_io_getevents(compat_aio_context_t ctx_id,
compat_long_t min_nr,
compat_long_t nr,
struct io_event __user *events,
struct compat_timespec __user *timeout);
asmlinkage long compat_sys_io_pgetevents(compat_aio_context_t ctx_id,
compat_long_t min_nr,
compat_long_t nr,
struct io_event __user *events,
struct compat_timespec __user *timeout,
const struct __compat_aio_sigset __user *usig);
/* fs/cookies.c */
asmlinkage long compat_sys_lookup_dcookie(u32, u32, char __user *, compat_size_t);
/* fs/eventpoll.c */
asmlinkage long compat_sys_epoll_pwait(int epfd,
struct epoll_event __user *events,
int maxevents, int timeout,
const compat_sigset_t __user *sigmask,
compat_size_t sigsetsize);
/* fs/fcntl.c */
asmlinkage long compat_sys_fcntl(unsigned int fd, unsigned int cmd,
compat_ulong_t arg);
asmlinkage long compat_sys_fcntl64(unsigned int fd, unsigned int cmd,
compat_ulong_t arg);
/* fs/ioctl.c */
asmlinkage long compat_sys_ioctl(unsigned int fd, unsigned int cmd,
compat_ulong_t arg);
/* fs/namespace.c */
asmlinkage long compat_sys_mount(const char __user *dev_name,
const char __user *dir_name,
const char __user *type, compat_ulong_t flags,
const void __user *data);
/* fs/open.c */
asmlinkage long compat_sys_statfs(const char __user *pathname,
struct compat_statfs __user *buf);
asmlinkage long compat_sys_statfs64(const char __user *pathname,
compat_size_t sz,
struct compat_statfs64 __user *buf);
asmlinkage long compat_sys_fstatfs(unsigned int fd,
struct compat_statfs __user *buf);
asmlinkage long compat_sys_fstatfs64(unsigned int fd, compat_size_t sz,
struct compat_statfs64 __user *buf);
asmlinkage long compat_sys_truncate(const char __user *, compat_off_t);
asmlinkage long compat_sys_ftruncate(unsigned int, compat_ulong_t);
/* No generic prototype for truncate64, ftruncate64, fallocate */
asmlinkage long compat_sys_openat(int dfd, const char __user *filename,
int flags, umode_t mode);
/* fs/readdir.c */
asmlinkage long compat_sys_getdents(unsigned int fd,
struct compat_linux_dirent __user *dirent,
unsigned int count);
/* fs/read_write.c */
asmlinkage long compat_sys_lseek(unsigned int, compat_off_t, unsigned int);
asmlinkage ssize_t compat_sys_readv(compat_ulong_t fd,
const struct compat_iovec __user *vec, compat_ulong_t vlen);
asmlinkage ssize_t compat_sys_writev(compat_ulong_t fd,
const struct compat_iovec __user *vec, compat_ulong_t vlen);
/* No generic prototype for pread64 and pwrite64 */
asmlinkage ssize_t compat_sys_preadv(compat_ulong_t fd,
const struct compat_iovec __user *vec,
compat_ulong_t vlen, u32 pos_low, u32 pos_high);
asmlinkage ssize_t compat_sys_pwritev(compat_ulong_t fd,
const struct compat_iovec __user *vec,
compat_ulong_t vlen, u32 pos_low, u32 pos_high);
#ifdef __ARCH_WANT_COMPAT_SYS_PREADV64
asmlinkage long compat_sys_preadv64(unsigned long fd,
const struct compat_iovec __user *vec,
unsigned long vlen, loff_t pos);
#endif
#ifdef __ARCH_WANT_COMPAT_SYS_PWRITEV64
asmlinkage long compat_sys_pwritev64(unsigned long fd,
const struct compat_iovec __user *vec,
unsigned long vlen, loff_t pos);
#endif
/* fs/sendfile.c */
asmlinkage long compat_sys_sendfile(int out_fd, int in_fd,
compat_off_t __user *offset, compat_size_t count);
asmlinkage long compat_sys_sendfile64(int out_fd, int in_fd,
compat_loff_t __user *offset, compat_size_t count);
/* fs/select.c */
asmlinkage long compat_sys_pselect6(int n, compat_ulong_t __user *inp,
compat_ulong_t __user *outp,
compat_ulong_t __user *exp,
struct compat_timespec __user *tsp,
void __user *sig);
asmlinkage long compat_sys_ppoll(struct pollfd __user *ufds,
unsigned int nfds,
struct compat_timespec __user *tsp,
const compat_sigset_t __user *sigmask,
compat_size_t sigsetsize);
/* fs/signalfd.c */
asmlinkage long compat_sys_signalfd4(int ufd,
const compat_sigset_t __user *sigmask,
compat_size_t sigsetsize, int flags);
/* fs/splice.c */
asmlinkage long compat_sys_vmsplice(int fd, const struct compat_iovec __user *,
unsigned int nr_segs, unsigned int flags);
/* fs/stat.c */
asmlinkage long compat_sys_newfstatat(unsigned int dfd,
const char __user *filename,
struct compat_stat __user *statbuf,
int flag);
asmlinkage long compat_sys_newfstat(unsigned int fd,
struct compat_stat __user *statbuf);
/* fs/sync.c: No generic prototype for sync_file_range and sync_file_range2 */
/* fs/timerfd.c */
asmlinkage long compat_sys_timerfd_gettime(int ufd,
struct compat_itimerspec __user *otmr);
asmlinkage long compat_sys_timerfd_settime(int ufd, int flags,
const struct compat_itimerspec __user *utmr,
struct compat_itimerspec __user *otmr);
/* fs/utimes.c */
asmlinkage long compat_sys_utimensat(unsigned int dfd,
const char __user *filename,
struct compat_timespec __user *t,
int flags);
/* kernel/exit.c */
asmlinkage long compat_sys_waitid(int, compat_pid_t,
struct compat_siginfo __user *, int,
struct compat_rusage __user *);
/* kernel/futex.c */
asmlinkage long compat_sys_futex(u32 __user *uaddr, int op, u32 val,
struct compat_timespec __user *utime, u32 __user *uaddr2,
u32 val3);
asmlinkage long
compat_sys_set_robust_list(struct compat_robust_list_head __user *head,
compat_size_t len);
asmlinkage long
compat_sys_get_robust_list(int pid, compat_uptr_t __user *head_ptr,
compat_size_t __user *len_ptr);
/* kernel/hrtimer.c */
asmlinkage long compat_sys_nanosleep(struct compat_timespec __user *rqtp,
struct compat_timespec __user *rmtp);
/* kernel/itimer.c */
asmlinkage long compat_sys_getitimer(int which,
struct compat_itimerval __user *it);
asmlinkage long compat_sys_setitimer(int which,
struct compat_itimerval __user *in,
struct compat_itimerval __user *out);
/* kernel/kexec.c */
asmlinkage long compat_sys_kexec_load(compat_ulong_t entry,
compat_ulong_t nr_segments,
struct compat_kexec_segment __user *,
compat_ulong_t flags);
/* kernel/posix-timers.c */
asmlinkage long compat_sys_timer_create(clockid_t which_clock,
struct compat_sigevent __user *timer_event_spec,
timer_t __user *created_timer_id);
asmlinkage long compat_sys_timer_gettime(timer_t timer_id,
struct compat_itimerspec __user *setting);
asmlinkage long compat_sys_timer_settime(timer_t timer_id, int flags,
struct compat_itimerspec __user *new,
struct compat_itimerspec __user *old);
asmlinkage long compat_sys_clock_settime(clockid_t which_clock,
struct compat_timespec __user *tp);
asmlinkage long compat_sys_clock_gettime(clockid_t which_clock,
struct compat_timespec __user *tp);
asmlinkage long compat_sys_clock_getres(clockid_t which_clock,
struct compat_timespec __user *tp);
asmlinkage long compat_sys_clock_nanosleep(clockid_t which_clock, int flags,
struct compat_timespec __user *rqtp,
struct compat_timespec __user *rmtp);
/* kernel/ptrace.c */
asmlinkage long compat_sys_ptrace(compat_long_t request, compat_long_t pid,
compat_long_t addr, compat_long_t data);
/* kernel/sched/core.c */
asmlinkage long compat_sys_sched_setaffinity(compat_pid_t pid,
unsigned int len,
compat_ulong_t __user *user_mask_ptr);
asmlinkage long compat_sys_sched_getaffinity(compat_pid_t pid,
unsigned int len,
compat_ulong_t __user *user_mask_ptr);
asmlinkage long compat_sys_sched_rr_get_interval(compat_pid_t pid,
struct compat_timespec __user *interval);
/* kernel/signal.c */
asmlinkage long compat_sys_sigaltstack(const compat_stack_t __user *uss_ptr,
compat_stack_t __user *uoss_ptr);
asmlinkage long compat_sys_rt_sigsuspend(compat_sigset_t __user *unewset,
compat_size_t sigsetsize);
#ifndef CONFIG_ODD_RT_SIGACTION
asmlinkage long compat_sys_rt_sigaction(int,
const struct compat_sigaction __user *,
struct compat_sigaction __user *,
compat_size_t);
#endif
asmlinkage long compat_sys_rt_sigprocmask(int how, compat_sigset_t __user *set,
compat_sigset_t __user *oset,
compat_size_t sigsetsize);
asmlinkage long compat_sys_rt_sigpending(compat_sigset_t __user *uset,
compat_size_t sigsetsize);
asmlinkage long compat_sys_rt_sigtimedwait(compat_sigset_t __user *uthese,
struct compat_siginfo __user *uinfo,
struct compat_timespec __user *uts, compat_size_t sigsetsize);
asmlinkage long compat_sys_rt_sigqueueinfo(compat_pid_t pid, int sig,
struct compat_siginfo __user *uinfo);
/* No generic prototype for rt_sigreturn */
/* kernel/sys.c */
asmlinkage long compat_sys_times(struct compat_tms __user *tbuf);
asmlinkage long compat_sys_getrlimit(unsigned int resource,
struct compat_rlimit __user *rlim);
asmlinkage long compat_sys_setrlimit(unsigned int resource,
struct compat_rlimit __user *rlim);
asmlinkage long compat_sys_getrusage(int who, struct compat_rusage __user *ru);
/* kernel/time.c */
asmlinkage long compat_sys_gettimeofday(struct compat_timeval __user *tv,
struct timezone __user *tz);
asmlinkage long compat_sys_settimeofday(struct compat_timeval __user *tv,
struct timezone __user *tz);
asmlinkage long compat_sys_adjtimex(struct compat_timex __user *utp);
/* kernel/timer.c */
asmlinkage long compat_sys_sysinfo(struct compat_sysinfo __user *info);
/* ipc/mqueue.c */
asmlinkage long compat_sys_mq_open(const char __user *u_name,
int oflag, compat_mode_t mode,
struct compat_mq_attr __user *u_attr);
asmlinkage long compat_sys_mq_timedsend(mqd_t mqdes,
const char __user *u_msg_ptr,
compat_size_t msg_len, unsigned int msg_prio,
const struct compat_timespec __user *u_abs_timeout);
asmlinkage ssize_t compat_sys_mq_timedreceive(mqd_t mqdes,
char __user *u_msg_ptr,
compat_size_t msg_len, unsigned int __user *u_msg_prio,
const struct compat_timespec __user *u_abs_timeout);
asmlinkage long compat_sys_mq_notify(mqd_t mqdes,
const struct compat_sigevent __user *u_notification);
asmlinkage long compat_sys_mq_getsetattr(mqd_t mqdes,
const struct compat_mq_attr __user *u_mqstat,
struct compat_mq_attr __user *u_omqstat);
/* ipc/msg.c */
asmlinkage long compat_sys_msgctl(int first, int second, void __user *uptr);
asmlinkage long compat_sys_msgrcv(int msqid, compat_uptr_t msgp,
compat_ssize_t msgsz, compat_long_t msgtyp, int msgflg);
asmlinkage long compat_sys_msgsnd(int msqid, compat_uptr_t msgp,
compat_ssize_t msgsz, int msgflg);
/* ipc/sem.c */
asmlinkage long compat_sys_semctl(int semid, int semnum, int cmd, int arg);
asmlinkage long compat_sys_semtimedop(int semid, struct sembuf __user *tsems,
unsigned nsems, const struct compat_timespec __user *timeout);
/* ipc/shm.c */
asmlinkage long compat_sys_shmctl(int first, int second, void __user *uptr);
asmlinkage long compat_sys_shmat(int shmid, compat_uptr_t shmaddr, int shmflg);
/* net/socket.c */
asmlinkage long compat_sys_recvfrom(int fd, void __user *buf, compat_size_t len,
unsigned flags, struct sockaddr __user *addr,
int __user *addrlen);
asmlinkage long compat_sys_setsockopt(int fd, int level, int optname,
char __user *optval, unsigned int optlen);
asmlinkage long compat_sys_getsockopt(int fd, int level, int optname,
char __user *optval, int __user *optlen);
asmlinkage long compat_sys_sendmsg(int fd, struct compat_msghdr __user *msg,
unsigned flags);
asmlinkage long compat_sys_recvmsg(int fd, struct compat_msghdr __user *msg,
unsigned int flags);
/* mm/filemap.c: No generic prototype for readahead */
/* security/keys/keyctl.c */
asmlinkage long compat_sys_keyctl(u32 option,
u32 arg2, u32 arg3, u32 arg4, u32 arg5);
/* arch/example/kernel/sys_example.c */
asmlinkage long compat_sys_execve(const char __user *filename, const compat_uptr_t __user *argv,
const compat_uptr_t __user *envp);
/* mm/fadvise.c: No generic prototype for fadvise64_64 */
/* mm/, CONFIG_MMU only */
asmlinkage long compat_sys_mbind(compat_ulong_t start, compat_ulong_t len,
compat_ulong_t mode,
compat_ulong_t __user *nmask,
compat_ulong_t maxnode, compat_ulong_t flags);
asmlinkage long compat_sys_get_mempolicy(int __user *policy,
compat_ulong_t __user *nmask,
compat_ulong_t maxnode,
compat_ulong_t addr,
compat_ulong_t flags);
asmlinkage long compat_sys_set_mempolicy(int mode, compat_ulong_t __user *nmask,
compat_ulong_t maxnode);
asmlinkage long compat_sys_migrate_pages(compat_pid_t pid,
compat_ulong_t maxnode, const compat_ulong_t __user *old_nodes,
const compat_ulong_t __user *new_nodes);
asmlinkage long compat_sys_move_pages(pid_t pid, compat_ulong_t nr_pages,
__u32 __user *pages,
const int __user *nodes,
int __user *status,
int flags);
asmlinkage long compat_sys_rt_tgsigqueueinfo(compat_pid_t tgid,
compat_pid_t pid, int sig,
struct compat_siginfo __user *uinfo);
asmlinkage long compat_sys_recvmmsg(int fd, struct compat_mmsghdr __user *mmsg,
unsigned vlen, unsigned int flags,
struct compat_timespec __user *timeout);
asmlinkage long compat_sys_wait4(compat_pid_t pid,
compat_uint_t __user *stat_addr, int options,
struct compat_rusage __user *ru);
asmlinkage long compat_sys_fanotify_mark(int, unsigned int, __u32, __u32,
int, const char __user *);
asmlinkage long compat_sys_open_by_handle_at(int mountdirfd,
struct file_handle __user *handle,
int flags);
asmlinkage long compat_sys_clock_adjtime(clockid_t which_clock,
struct compat_timex __user *tp);
asmlinkage long compat_sys_sendmmsg(int fd, struct compat_mmsghdr __user *mmsg,
unsigned vlen, unsigned int flags);
asmlinkage ssize_t compat_sys_process_vm_readv(compat_pid_t pid,
const struct compat_iovec __user *lvec,
compat_ulong_t liovcnt, const struct compat_iovec __user *rvec,
compat_ulong_t riovcnt, compat_ulong_t flags);
asmlinkage ssize_t compat_sys_process_vm_writev(compat_pid_t pid,
const struct compat_iovec __user *lvec,
compat_ulong_t liovcnt, const struct compat_iovec __user *rvec,
compat_ulong_t riovcnt, compat_ulong_t flags);
asmlinkage long compat_sys_execveat(int dfd, const char __user *filename,
const compat_uptr_t __user *argv,
const compat_uptr_t __user *envp, int flags);
asmlinkage ssize_t compat_sys_preadv2(compat_ulong_t fd,
const struct compat_iovec __user *vec,
compat_ulong_t vlen, u32 pos_low, u32 pos_high, rwf_t flags);
asmlinkage ssize_t compat_sys_pwritev2(compat_ulong_t fd,
const struct compat_iovec __user *vec,
compat_ulong_t vlen, u32 pos_low, u32 pos_high, rwf_t flags);
#ifdef __ARCH_WANT_COMPAT_SYS_PREADV64V2
asmlinkage long compat_sys_readv64v2(unsigned long fd,
const struct compat_iovec __user *vec,
unsigned long vlen, loff_t pos, rwf_t flags);
#endif
#ifdef __ARCH_WANT_COMPAT_SYS_PWRITEV64V2
asmlinkage long compat_sys_pwritev64v2(unsigned long fd,
const struct compat_iovec __user *vec,
unsigned long vlen, loff_t pos, rwf_t flags);
#endif
/*
* Deprecated system calls which are still defined in
* include/uapi/asm-generic/unistd.h and wanted by >= 1 arch
*/
/* __ARCH_WANT_SYSCALL_NO_AT */
asmlinkage long compat_sys_open(const char __user *filename, int flags,
umode_t mode);
asmlinkage long compat_sys_utimes(const char __user *filename,
struct compat_timeval __user *t);
/* __ARCH_WANT_SYSCALL_NO_FLAGS */
asmlinkage long compat_sys_signalfd(int ufd,
const compat_sigset_t __user *sigmask,
compat_size_t sigsetsize);
/* __ARCH_WANT_SYSCALL_OFF_T */
asmlinkage long compat_sys_newstat(const char __user *filename,
struct compat_stat __user *statbuf);
asmlinkage long compat_sys_newlstat(const char __user *filename,
struct compat_stat __user *statbuf);
/* __ARCH_WANT_SYSCALL_DEPRECATED */
asmlinkage long compat_sys_time(compat_time_t __user *tloc);
asmlinkage long compat_sys_utime(const char __user *filename,
struct compat_utimbuf __user *t);
asmlinkage long compat_sys_futimesat(unsigned int dfd,
const char __user *filename,
struct compat_timeval __user *t);
asmlinkage long compat_sys_select(int n, compat_ulong_t __user *inp,
compat_ulong_t __user *outp, compat_ulong_t __user *exp,
struct compat_timeval __user *tvp);
asmlinkage long compat_sys_ustat(unsigned dev, struct compat_ustat __user *u32);
asmlinkage long compat_sys_recv(int fd, void __user *buf, compat_size_t len,
unsigned flags);
asmlinkage long compat_sys_sysctl(struct compat_sysctl_args __user *args);
/* obsolete: fs/readdir.c */
asmlinkage long compat_sys_old_readdir(unsigned int fd,
struct compat_old_linux_dirent __user *,
unsigned int count);
/* obsolete: fs/select.c */
asmlinkage long compat_sys_old_select(struct compat_sel_arg_struct __user *arg);
/* obsolete: ipc */
asmlinkage long compat_sys_ipc(u32, int, int, u32, compat_uptr_t, u32);
/* obsolete: kernel/signal.c */
#ifdef __ARCH_WANT_SYS_SIGPENDING
asmlinkage long compat_sys_sigpending(compat_old_sigset_t __user *set);
#endif
#ifdef __ARCH_WANT_SYS_SIGPROCMASK
asmlinkage long compat_sys_sigprocmask(int how, compat_old_sigset_t __user *nset,
compat_old_sigset_t __user *oset);
#endif
#ifdef CONFIG_COMPAT_OLD_SIGACTION
asmlinkage long compat_sys_sigaction(int sig,
const struct compat_old_sigaction __user *act,
struct compat_old_sigaction __user *oact);
#endif
/* obsolete: kernel/time/time.c */
asmlinkage long compat_sys_stime(compat_time_t __user *tptr);
/* obsolete: net/socket.c */
asmlinkage long compat_sys_socketcall(int call, u32 __user *args);
#endif /* CONFIG_ARCH_HAS_SYSCALL_WRAPPER */
/*
* For most but not all architectures, "am I in a compat syscall?" and
* "am I a compat task?" are the same question. For architectures on which
* they aren't the same question, arch code can override in_compat_syscall.
*/
#ifndef in_compat_syscall
static inline bool in_compat_syscall(void) { return is_compat_task(); }
#endif
/**
* ns_to_compat_timeval - Compat version of ns_to_timeval
* @nsec: the nanoseconds value to be converted
*
* Returns the compat_timeval representation of the nsec parameter.
*/
static inline struct compat_timeval ns_to_compat_timeval(s64 nsec)
{
struct timeval tv;
struct compat_timeval ctv;
tv = ns_to_timeval(nsec);
ctv.tv_sec = tv.tv_sec;
ctv.tv_usec = tv.tv_usec;
return ctv;
}
/*
* Kernel code should not call compat syscalls (i.e., compat_sys_xyzyyz())
* directly. Instead, use one of the functions which work equivalently, such
* as the kcompat_sys_xyzyyz() functions prototyped below.
*/
int kcompat_sys_statfs64(const char __user * pathname, compat_size_t sz,
struct compat_statfs64 __user * buf);
int kcompat_sys_fstatfs64(unsigned int fd, compat_size_t sz,
struct compat_statfs64 __user * buf);
#else /* !CONFIG_COMPAT */
#define is_compat_task() (0)
#ifndef in_compat_syscall
static inline bool in_compat_syscall(void) { return false; }
#endif
#endif /* CONFIG_COMPAT */
#endif /* _LINUX_COMPAT_H */
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