diff options
Diffstat (limited to 'include/linux/compat.h')
| -rw-r--r-- | include/linux/compat.h | 1074 |
1 files changed, 689 insertions, 385 deletions
diff --git a/include/linux/compat.h b/include/linux/compat.h index 7f0c1dd09079..56cebaff0c91 100644 --- a/include/linux/compat.h +++ b/include/linux/compat.h @@ -1,3 +1,4 @@ +/* SPDX-License-Identifier: GPL-2.0 */ #ifndef _LINUX_COMPAT_H #define _LINUX_COMPAT_H /* @@ -5,7 +6,8 @@ * syscall compatibility layer. */ -#ifdef CONFIG_COMPAT +#include <linux/types.h> +#include <linux/time.h> #include <linux/stat.h> #include <linux/param.h> /* for HZ */ @@ -14,19 +16,39 @@ #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> #include <asm/siginfo.h> #include <asm/signal.h> +#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) ((t)(unsigned long)(v)) +#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, ...) \ @@ -40,15 +62,35 @@ #define COMPAT_SYSCALL_DEFINE6(name, ...) \ COMPAT_SYSCALL_DEFINEx(6, _##name, __VA_ARGS__) -#define COMPAT_SYSCALL_DEFINEx(x, name, ...) \ - asmlinkage long compat_sys##name(__MAP(x,__SC_DECL,__VA_ARGS__));\ - static inline long C_SYSC##name(__MAP(x,__SC_DECL,__VA_ARGS__));\ - asmlinkage long compat_SyS##name(__MAP(x,__SC_LONG,__VA_ARGS__))\ - { \ - return C_SYSC##name(__MAP(x,__SC_DELOUSE,__VA_ARGS__)); \ - } \ - SYSCALL_ALIAS(compat_sys##name, compat_SyS##name); \ - static inline long C_SYSC##name(__MAP(x,__SC_DECL,__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__)) \ + __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 */ + +struct compat_iovec { + compat_uptr_t iov_base; + compat_size_t iov_len; +}; #ifndef compat_user_stack_pointer #define compat_user_stack_pointer() current_user_stack_pointer() @@ -60,6 +102,9 @@ typedef struct compat_sigaltstack { 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) @@ -70,20 +115,7 @@ typedef __compat_gid32_t compat_gid_t; struct compat_sel_arg_struct; struct rusage; -struct compat_itimerspec { - struct compat_timespec it_interval; - struct compat_timespec it_value; -}; - -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 old_itimerval32; struct compat_tms { compat_clock_t tms_utime; @@ -92,39 +124,15 @@ struct compat_tms { 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; -}; - #define _COMPAT_NSIG_WORDS (_COMPAT_NSIG / _COMPAT_NSIG_BPW) typedef struct { compat_sigset_word sig[_COMPAT_NSIG_WORDS]; } compat_sigset_t; +int set_compat_user_sigmask(const compat_sigset_t __user *umask, + size_t sigsetsize); + struct compat_sigaction { #ifndef __ARCH_HAS_IRIX_SIGACTION compat_uptr_t sa_handler; @@ -139,40 +147,150 @@ struct compat_sigaction { compat_sigset_t sa_mask __packed; }; -/* - * These functions operate strictly on struct compat_time* - */ -extern int get_compat_timespec(struct timespec *, - const struct compat_timespec __user *); -extern int put_compat_timespec(const struct timespec *, - struct compat_timespec __user *); -extern int get_compat_timeval(struct timeval *, - const struct compat_timeval __user *); -extern int put_compat_timeval(const struct timeval *, - struct compat_timeval __user *); -/* - * These functions operate on 32- or 64-bit specs depending on - * COMPAT_USE_64BIT_TIME, hence the void user pointer arguments and the - * naming as compat_get/put_ rather than get/put_compat_. - */ -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 *); +typedef union compat_sigval { + compat_int_t sival_int; + compat_uptr_t sival_ptr; +} compat_sigval_t; -struct compat_iovec { - compat_uptr_t iov_base; - compat_size_t iov_len; -}; +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. */ +#define __COMPAT_ADDR_BND_PKEY_PAD (__alignof__(compat_uptr_t) < sizeof(short) ? \ + sizeof(short) : __alignof__(compat_uptr_t)) + union { + /* used on alpha and sparc */ + int _trapno; /* TRAP # which caused the signal */ + /* + * 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; + /* used when si_code=TRAP_PERF */ + struct { + compat_ulong_t _data; + u32 _type; + u32 _flags; + } _perf; + }; + } _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; struct compat_rlimit { compat_ulong_t rlim_cur; compat_ulong_t rlim_max; }; +#ifdef __ARCH_NEED_COMPAT_FLOCK64_PACKED +#define __ARCH_COMPAT_FLOCK64_PACK __attribute__((packed)) +#else +#define __ARCH_COMPAT_FLOCK64_PACK +#endif + +struct compat_flock { + short l_type; + short l_whence; + compat_off_t l_start; + compat_off_t l_len; +#ifdef __ARCH_COMPAT_FLOCK_EXTRA_SYSID + __ARCH_COMPAT_FLOCK_EXTRA_SYSID +#endif + compat_pid_t l_pid; +#ifdef __ARCH_COMPAT_FLOCK_PAD + __ARCH_COMPAT_FLOCK_PAD +#endif +}; + +struct compat_flock64 { + short l_type; + short l_whence; + compat_loff_t l_start; + compat_loff_t l_len; + compat_pid_t l_pid; +#ifdef __ARCH_COMPAT_FLOCK64_PAD + __ARCH_COMPAT_FLOCK64_PAD +#endif +} __ARCH_COMPAT_FLOCK64_PACK; + struct compat_rusage { - struct compat_timeval ru_utime; - struct compat_timeval ru_stime; + struct old_timeval32 ru_utime; + struct old_timeval32 ru_stime; compat_long_t ru_maxrss; compat_long_t ru_ixrss; compat_long_t ru_idrss; @@ -193,10 +311,7 @@ extern int put_compat_rusage(const struct rusage *, struct compat_rusage __user *); struct compat_siginfo; - -extern asmlinkage long compat_sys_waitid(int, compat_pid_t, - struct compat_siginfo __user *, int, - struct compat_rusage __user *); +struct __compat_aio_sigset; struct compat_dirent { u32 d_ino; @@ -289,6 +404,14 @@ struct compat_old_sigaction { }; #endif +struct compat_keyctl_kdf_params { + compat_uptr_t hashname; + compat_uptr_t otherinfo; + __u32 otherinfolen; + __u32 __spare[8]; +}; + +struct compat_stat; struct compat_statfs; struct compat_statfs64; struct compat_old_linux_dirent; @@ -302,115 +425,112 @@ struct compat_kexec_segment; struct compat_mq_attr; struct compat_msgbuf; -extern void compat_exit_robust_list(struct task_struct *curr); - -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); - -asmlinkage long compat_sys_ipc(u32, int, int, u32, compat_uptr_t, u32); -asmlinkage long compat_sys_shmat(int shmid, compat_uptr_t shmaddr, int shmflg); -asmlinkage long compat_sys_semctl(int semid, int semnum, int cmd, int arg); -asmlinkage long compat_sys_msgsnd(int msqid, compat_uptr_t msgp, - compat_ssize_t msgsz, int msgflg); -asmlinkage long compat_sys_msgrcv(int msqid, compat_uptr_t msgp, - compat_ssize_t msgsz, long msgtyp, int msgflg); -long compat_sys_msgctl(int first, int second, void __user *uptr); -long compat_sys_shmctl(int first, int second, void __user *uptr); -long compat_sys_semtimedop(int semid, struct sembuf __user *tsems, - unsigned nsems, const struct compat_timespec __user *timeout); -asmlinkage long compat_sys_keyctl(u32 option, - u32 arg2, u32 arg3, u32 arg4, u32 arg5); -asmlinkage long compat_sys_ustat(unsigned dev, struct compat_ustat __user *u32); - -asmlinkage ssize_t compat_sys_readv(unsigned long fd, - const struct compat_iovec __user *vec, unsigned long vlen); -asmlinkage ssize_t compat_sys_writev(unsigned long fd, - const struct compat_iovec __user *vec, unsigned long vlen); -asmlinkage ssize_t compat_sys_preadv(unsigned long fd, - const struct compat_iovec __user *vec, - unsigned long vlen, u32 pos_low, u32 pos_high); -asmlinkage ssize_t compat_sys_pwritev(unsigned long fd, - const struct compat_iovec __user *vec, - unsigned long vlen, u32 pos_low, u32 pos_high); -asmlinkage long comat_sys_lseek(unsigned int, compat_off_t, unsigned int); - -asmlinkage long compat_sys_execve(const char __user *filename, const compat_uptr_t __user *argv, - const compat_uptr_t __user *envp); - -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_old_select(struct compat_sel_arg_struct __user *arg); - -asmlinkage long compat_sys_wait4(compat_pid_t pid, - compat_uint_t __user *stat_addr, int options, - struct compat_rusage __user *ru); - -#define BITS_PER_COMPAT_LONG (8*sizeof(compat_long_t)) - -#define BITS_TO_COMPAT_LONGS(bits) \ - (((bits)+BITS_PER_COMPAT_LONG-1)/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, struct compat_siginfo __user *from); -int copy_siginfo_to_user32(struct compat_siginfo __user *to, siginfo_t *from); +void copy_siginfo_to_external32(struct compat_siginfo *to, + const struct kernel_siginfo *from); +int copy_siginfo_from_user32(kernel_siginfo_t *to, + const struct compat_siginfo __user *from); +int __copy_siginfo_to_user32(struct compat_siginfo __user *to, + const kernel_siginfo_t *from); +#ifndef copy_siginfo_to_user32 +#define copy_siginfo_to_user32 __copy_siginfo_to_user32 +#endif int get_compat_sigevent(struct sigevent *event, const struct compat_sigevent __user *u_event); -long compat_sys_rt_tgsigqueueinfo(compat_pid_t tgid, compat_pid_t pid, int sig, - struct compat_siginfo __user *uinfo); -#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 -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; -} +extern int get_compat_sigset(sigset_t *set, const compat_sigset_t __user *compat); -static inline int compat_timespec_compare(struct compat_timespec *lhs, - struct compat_timespec *rhs) +/* + * 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) { - 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; + /* size <= sizeof(compat_sigset_t) <= sizeof(sigset_t) */ +#if defined(__BIG_ENDIAN) && defined(CONFIG_64BIT) + compat_sigset_t v; + switch (_NSIG_WORDS) { + case 4: v.sig[7] = (set->sig[3] >> 32); v.sig[6] = set->sig[3]; + fallthrough; + case 3: v.sig[5] = (set->sig[2] >> 32); v.sig[4] = set->sig[2]; + fallthrough; + case 2: v.sig[3] = (set->sig[1] >> 32); v.sig[2] = set->sig[1]; + fallthrough; + 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 get_compat_itimerspec(struct itimerspec *dst, - const struct compat_itimerspec __user *src); -extern int put_compat_itimerspec(struct compat_itimerspec __user *dst, - const struct itimerspec *src); - -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); - -extern int compat_printk(const char *fmt, ...); -extern void sigset_from_compat(sigset_t *set, const compat_sigset_t *compat); -extern void sigset_to_compat(compat_sigset_t *compat, const sigset_t *set); - -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); +#ifdef CONFIG_CPU_BIG_ENDIAN +#define unsafe_put_compat_sigset(compat, set, label) do { \ + compat_sigset_t __user *__c = compat; \ + const sigset_t *__s = set; \ + \ + switch (_NSIG_WORDS) { \ + case 4: \ + unsafe_put_user(__s->sig[3] >> 32, &__c->sig[7], label); \ + unsafe_put_user(__s->sig[3], &__c->sig[6], label); \ + fallthrough; \ + case 3: \ + unsafe_put_user(__s->sig[2] >> 32, &__c->sig[5], label); \ + unsafe_put_user(__s->sig[2], &__c->sig[4], label); \ + fallthrough; \ + case 2: \ + unsafe_put_user(__s->sig[1] >> 32, &__c->sig[3], label); \ + unsafe_put_user(__s->sig[1], &__c->sig[2], label); \ + fallthrough; \ + case 1: \ + unsafe_put_user(__s->sig[0] >> 32, &__c->sig[1], label); \ + unsafe_put_user(__s->sig[0], &__c->sig[0], label); \ + } \ +} while (0) + +#define unsafe_get_compat_sigset(set, compat, label) do { \ + const compat_sigset_t __user *__c = compat; \ + compat_sigset_word hi, lo; \ + sigset_t *__s = set; \ + \ + switch (_NSIG_WORDS) { \ + case 4: \ + unsafe_get_user(lo, &__c->sig[7], label); \ + unsafe_get_user(hi, &__c->sig[6], label); \ + __s->sig[3] = hi | (((long)lo) << 32); \ + fallthrough; \ + case 3: \ + unsafe_get_user(lo, &__c->sig[5], label); \ + unsafe_get_user(hi, &__c->sig[4], label); \ + __s->sig[2] = hi | (((long)lo) << 32); \ + fallthrough; \ + case 2: \ + unsafe_get_user(lo, &__c->sig[3], label); \ + unsafe_get_user(hi, &__c->sig[2], label); \ + __s->sig[1] = hi | (((long)lo) << 32); \ + fallthrough; \ + case 1: \ + unsafe_get_user(lo, &__c->sig[1], label); \ + unsafe_get_user(hi, &__c->sig[0], label); \ + __s->sig[0] = hi | (((long)lo) << 32); \ + } \ +} while (0) +#else +#define unsafe_put_compat_sigset(compat, set, label) do { \ + compat_sigset_t __user *__c = compat; \ + const sigset_t *__s = set; \ + \ + unsafe_copy_to_user(__c, __s, sizeof(*__c), label); \ +} while (0) + +#define unsafe_get_compat_sigset(set, compat, label) do { \ + const compat_sigset_t __user *__c = compat; \ + sigset_t *__s = set; \ + \ + unsafe_copy_from_user(__s, __c, sizeof(*__c), label); \ +} while (0) +#endif extern int compat_ptrace_request(struct task_struct *child, compat_long_t request, @@ -418,266 +538,450 @@ extern int compat_ptrace_request(struct task_struct *child, extern long compat_arch_ptrace(struct task_struct *child, compat_long_t request, compat_ulong_t addr, compat_ulong_t data); -asmlinkage long compat_sys_ptrace(compat_long_t request, compat_long_t pid, - compat_long_t addr, compat_long_t data); -asmlinkage long compat_sys_lookup_dcookie(u32, u32, char __user *, size_t); +struct epoll_event; /* fortunately, this one is fixed-layout */ + +int compat_restore_altstack(const compat_stack_t __user *uss); +int __compat_save_altstack(compat_stack_t __user *, unsigned long); +#define unsafe_compat_save_altstack(uss, sp, label) do { \ + compat_stack_t __user *__uss = uss; \ + struct task_struct *t = current; \ + unsafe_put_user(ptr_to_compat((void __user *)t->sas_ss_sp), \ + &__uss->ss_sp, label); \ + unsafe_put_user(t->sas_ss_flags, &__uss->ss_flags, label); \ + unsafe_put_user(t->sas_ss_size, &__uss->ss_size, label); \ +} while (0); + /* - * epoll (fs/eventpoll.c) compat bits follow ... + * 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. */ -struct epoll_event; /* fortunately, this one is fixed-layout */ +#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_pgetevents(compat_aio_context_t ctx_id, + compat_long_t min_nr, + compat_long_t nr, + struct io_event __user *events, + struct old_timespec32 __user *timeout, + const struct __compat_aio_sigset __user *usig); +asmlinkage long compat_sys_io_pgetevents_time64(compat_aio_context_t ctx_id, + compat_long_t min_nr, + compat_long_t nr, + struct io_event __user *events, + struct __kernel_timespec __user *timeout, + const struct __compat_aio_sigset __user *usig); 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); - -asmlinkage long compat_sys_utime(const char __user *filename, - struct compat_utimbuf __user *t); -asmlinkage long compat_sys_utimensat(unsigned int dfd, - const char __user *filename, - struct compat_timespec __user *t, - int flags); - -asmlinkage long compat_sys_time(compat_time_t __user *tloc); -asmlinkage long compat_sys_stime(compat_time_t __user *tptr); -asmlinkage long compat_sys_signalfd(int ufd, - const compat_sigset_t __user *sigmask, - compat_size_t sigsetsize); -asmlinkage long compat_sys_timerfd_settime(int ufd, int flags, - const struct compat_itimerspec __user *utmr, - struct compat_itimerspec __user *otmr); -asmlinkage long compat_sys_timerfd_gettime(int ufd, - struct compat_itimerspec __user *otmr); - -asmlinkage long compat_sys_move_pages(pid_t pid, unsigned long nr_page, - __u32 __user *pages, - const int __user *nodes, - int __user *status, - int flags); -asmlinkage long compat_sys_futimesat(unsigned int dfd, - const char __user *filename, - struct compat_timeval __user *t); -asmlinkage long compat_sys_utimes(const char __user *filename, - struct compat_timeval __user *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); -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); +asmlinkage long compat_sys_epoll_pwait2(int epfd, + struct epoll_event __user *events, + int maxevents, + const struct __kernel_timespec __user *timeout, + const compat_sigset_t __user *sigmask, + compat_size_t sigsetsize); +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); +asmlinkage long compat_sys_ioctl(unsigned int fd, unsigned int cmd, + compat_ulong_t arg); asmlinkage long compat_sys_statfs(const char __user *pathname, struct compat_statfs __user *buf); -asmlinkage long compat_sys_fstatfs(unsigned int fd, - 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_fcntl64(unsigned int fd, unsigned int cmd, - unsigned long arg); -asmlinkage long compat_sys_fcntl(unsigned int fd, unsigned int cmd, - unsigned long arg); -asmlinkage long compat_sys_io_setup(unsigned nr_reqs, u32 __user *ctx32p); -asmlinkage long compat_sys_io_getevents(aio_context_t ctx_id, - unsigned long min_nr, - unsigned long nr, - struct io_event __user *events, - struct compat_timespec __user *timeout); -asmlinkage long compat_sys_io_submit(aio_context_t ctx_id, int nr, - u32 __user *iocb); -asmlinkage long compat_sys_mount(const char __user *dev_name, - const char __user *dir_name, - const char __user *type, unsigned long flags, - const void __user *data); -asmlinkage long compat_sys_old_readdir(unsigned int fd, - struct compat_old_linux_dirent __user *, - unsigned int count); +asmlinkage long compat_sys_truncate(const char __user *, compat_off_t); +asmlinkage long compat_sys_ftruncate(unsigned int, compat_off_t); +/* No generic prototype for truncate64, ftruncate64, fallocate */ +asmlinkage long compat_sys_openat(int dfd, const char __user *filename, + int flags, umode_t mode); asmlinkage long compat_sys_getdents(unsigned int fd, struct compat_linux_dirent __user *dirent, unsigned int count); -asmlinkage long compat_sys_getdents64(unsigned int fd, - struct linux_dirent64 __user *dirent, - unsigned int count); -asmlinkage long compat_sys_vmsplice(int fd, const struct compat_iovec __user *, - unsigned int nr_segs, unsigned int flags); -asmlinkage long compat_sys_open(const char __user *filename, int flags, - umode_t mode); -asmlinkage long compat_sys_openat(int dfd, const char __user *filename, - int flags, umode_t mode); -asmlinkage long compat_sys_open_by_handle_at(int mountdirfd, - struct file_handle __user *handle, - int flags); -asmlinkage long compat_sys_truncate(const char __user *, compat_off_t); -asmlinkage long compat_sys_ftruncate(unsigned int, compat_ulong_t); -asmlinkage long compat_sys_pselect6(int n, compat_ulong_t __user *inp, +asmlinkage long compat_sys_lseek(unsigned int, compat_off_t, unsigned int); +/* No generic prototype for pread64 and pwrite64 */ +asmlinkage ssize_t compat_sys_preadv(compat_ulong_t fd, + const struct 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 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 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 iovec __user *vec, + unsigned long vlen, loff_t pos); +#endif +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); +asmlinkage long compat_sys_pselect6_time32(int n, compat_ulong_t __user *inp, compat_ulong_t __user *outp, compat_ulong_t __user *exp, - struct compat_timespec __user *tsp, + struct old_timespec32 __user *tsp, void __user *sig); -asmlinkage long compat_sys_ppoll(struct pollfd __user *ufds, +asmlinkage long compat_sys_pselect6_time64(int n, compat_ulong_t __user *inp, + compat_ulong_t __user *outp, + compat_ulong_t __user *exp, + struct __kernel_timespec __user *tsp, + void __user *sig); +asmlinkage long compat_sys_ppoll_time32(struct pollfd __user *ufds, + unsigned int nfds, + struct old_timespec32 __user *tsp, + const compat_sigset_t __user *sigmask, + compat_size_t sigsetsize); +asmlinkage long compat_sys_ppoll_time64(struct pollfd __user *ufds, unsigned int nfds, - struct compat_timespec __user *tsp, + struct __kernel_timespec __user *tsp, const compat_sigset_t __user *sigmask, compat_size_t sigsetsize); asmlinkage long compat_sys_signalfd4(int ufd, const compat_sigset_t __user *sigmask, compat_size_t sigsetsize, int 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_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_setsockopt(int fd, int level, int optname, - char __user *optval, unsigned int optlen); -asmlinkage long compat_sys_sendmsg(int fd, struct compat_msghdr __user *msg, - unsigned flags); -asmlinkage long compat_sys_sendmmsg(int fd, struct compat_mmsghdr __user *mmsg, - unsigned vlen, unsigned int flags); -asmlinkage long compat_sys_recvmsg(int fd, struct compat_msghdr __user *msg, - unsigned int flags); -asmlinkage long compat_sys_recv(int fd, void __user *buf, size_t len, - unsigned flags); -asmlinkage long compat_sys_recvfrom(int fd, void __user *buf, size_t len, - unsigned flags, struct sockaddr __user *addr, - int __user *addrlen); -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_nanosleep(struct compat_timespec __user *rqtp, - struct compat_timespec __user *rmtp); +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); +/* No generic prototype for sync_file_range and sync_file_range2 */ +asmlinkage long compat_sys_waitid(int, compat_pid_t, + struct compat_siginfo __user *, int, + struct compat_rusage __user *); +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); asmlinkage long compat_sys_getitimer(int which, - struct compat_itimerval __user *it); + struct old_itimerval32 __user *it); asmlinkage long compat_sys_setitimer(int which, - struct compat_itimerval __user *in, - struct compat_itimerval __user *out); -asmlinkage long compat_sys_times(struct compat_tms __user *tbuf); -asmlinkage long compat_sys_setrlimit(unsigned int resource, - struct compat_rlimit __user *rlim); -asmlinkage long compat_sys_getrlimit(unsigned int resource, - struct compat_rlimit __user *rlim); -asmlinkage long compat_sys_getrusage(int who, struct compat_rusage __user *ru); + struct old_itimerval32 __user *in, + struct old_itimerval32 __user *out); +asmlinkage long compat_sys_kexec_load(compat_ulong_t entry, + compat_ulong_t nr_segments, + struct compat_kexec_segment __user *, + compat_ulong_t flags); +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_ptrace(compat_long_t request, compat_long_t pid, + compat_long_t addr, compat_long_t data); 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_timer_create(clockid_t which_clock, - struct compat_sigevent __user *timer_event_spec, - timer_t __user *created_timer_id); -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_timer_gettime(timer_t timer_id, - struct compat_itimerspec __user *setting); -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_adjtime(clockid_t which_clock, - struct compat_timex __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); -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_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); -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); #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_time32(compat_sigset_t __user *uthese, + struct compat_siginfo __user *uinfo, + struct old_timespec32 __user *uts, compat_size_t sigsetsize); +asmlinkage long compat_sys_rt_sigtimedwait_time64(compat_sigset_t __user *uthese, + struct compat_siginfo __user *uinfo, + struct __kernel_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 */ +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); +asmlinkage long compat_sys_gettimeofday(struct old_timeval32 __user *tv, + struct timezone __user *tz); +asmlinkage long compat_sys_settimeofday(struct old_timeval32 __user *tv, + struct timezone __user *tz); asmlinkage long compat_sys_sysinfo(struct compat_sysinfo __user *info); -asmlinkage long compat_sys_ioctl(unsigned int fd, unsigned int cmd, - unsigned long arg); -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_getsockopt(int fd, int level, int optname, - char __user *optval, int __user *optlen); -asmlinkage long compat_sys_kexec_load(unsigned long entry, - unsigned long nr_segments, - struct compat_kexec_segment __user *, - unsigned long flags); -asmlinkage long compat_sys_mq_getsetattr(mqd_t mqdes, - const struct compat_mq_attr __user *u_mqstat, - struct compat_mq_attr __user *u_omqstat); -asmlinkage long compat_sys_mq_notify(mqd_t mqdes, - const struct compat_sigevent __user *u_notification); 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, - 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, - 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); +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); +asmlinkage long compat_sys_semctl(int semid, int semnum, int cmd, int arg); +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); +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_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); +/* No generic prototype for readahead */ +asmlinkage long compat_sys_keyctl(u32 option, + u32 arg2, u32 arg3, u32 arg4, u32 arg5); +asmlinkage long compat_sys_execve(const char __user *filename, const compat_uptr_t __user *argv, + const compat_uptr_t __user *envp); +/* No generic prototype for fadvise64_64 */ +/* CONFIG_MMU only */ +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_time64(int fd, struct compat_mmsghdr __user *mmsg, + unsigned vlen, unsigned int flags, + struct __kernel_timespec __user *timeout); +asmlinkage long compat_sys_recvmmsg_time32(int fd, struct compat_mmsghdr __user *mmsg, + unsigned vlen, unsigned int flags, + struct old_timespec32 __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_sendmmsg(int fd, struct compat_mmsghdr __user *mmsg, + unsigned vlen, unsigned int 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 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 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_preadv64v2(unsigned long fd, + const struct 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 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); + +/* __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_select(int n, compat_ulong_t __user *inp, + compat_ulong_t __user *outp, compat_ulong_t __user *exp, + struct old_timeval32 __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); + +/* obsolete */ +asmlinkage long compat_sys_old_readdir(unsigned int fd, + struct compat_old_linux_dirent __user *, + unsigned int count); + +/* obsolete */ +asmlinkage long compat_sys_old_select(struct compat_sel_arg_struct __user *arg); + +/* obsolete */ +asmlinkage long compat_sys_ipc(u32, int, int, u32, compat_uptr_t, u32); + +/* obsolete */ +#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 */ asmlinkage long compat_sys_socketcall(int call, u32 __user *args); -asmlinkage long compat_sys_sysctl(struct compat_sysctl_args __user *args); -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); +#ifdef __ARCH_WANT_COMPAT_TRUNCATE64 +asmlinkage long compat_sys_truncate64(const char __user *pathname, compat_arg_u64(len)); +#endif -extern void __user *compat_alloc_user_space(unsigned long len); +#ifdef __ARCH_WANT_COMPAT_FTRUNCATE64 +asmlinkage long compat_sys_ftruncate64(unsigned int fd, compat_arg_u64(len)); +#endif -asmlinkage ssize_t compat_sys_process_vm_readv(compat_pid_t pid, - const struct compat_iovec __user *lvec, - unsigned long liovcnt, const struct compat_iovec __user *rvec, - unsigned long riovcnt, unsigned long flags); -asmlinkage ssize_t compat_sys_process_vm_writev(compat_pid_t pid, - const struct compat_iovec __user *lvec, - unsigned long liovcnt, const struct compat_iovec __user *rvec, - unsigned long riovcnt, unsigned long flags); +#ifdef __ARCH_WANT_COMPAT_FALLOCATE +asmlinkage long compat_sys_fallocate(int fd, int mode, compat_arg_u64(offset), + compat_arg_u64(len)); +#endif -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); -asmlinkage long compat_sys_sigaltstack(const compat_stack_t __user *uss_ptr, - compat_stack_t __user *uoss_ptr); +#ifdef __ARCH_WANT_COMPAT_PREAD64 +asmlinkage long compat_sys_pread64(unsigned int fd, char __user *buf, size_t count, + compat_arg_u64(pos)); +#endif -int compat_restore_altstack(const compat_stack_t __user *uss); -int __compat_save_altstack(compat_stack_t __user *, unsigned long); +#ifdef __ARCH_WANT_COMPAT_PWRITE64 +asmlinkage long compat_sys_pwrite64(unsigned int fd, const char __user *buf, size_t count, + compat_arg_u64(pos)); +#endif -asmlinkage long compat_sys_sched_rr_get_interval(compat_pid_t pid, - struct compat_timespec __user *interval); +#ifdef __ARCH_WANT_COMPAT_SYNC_FILE_RANGE +asmlinkage long compat_sys_sync_file_range(int fd, compat_arg_u64(pos), + compat_arg_u64(nbytes), unsigned int flags); +#endif -asmlinkage long compat_sys_fanotify_mark(int, unsigned int, __u32, __u32, - int, const char __user *); -#else +#ifdef __ARCH_WANT_COMPAT_FADVISE64_64 +asmlinkage long compat_sys_fadvise64_64(int fd, compat_arg_u64(pos), + compat_arg_u64(len), int advice); +#endif + +#ifdef __ARCH_WANT_COMPAT_READAHEAD +asmlinkage long compat_sys_readahead(int fd, compat_arg_u64(offset), size_t count); +#endif + +#endif /* CONFIG_ARCH_HAS_SYSCALL_WRAPPER */ + +/** + * ns_to_old_timeval32 - Compat version of ns_to_timeval + * @nsec: the nanoseconds value to be converted + * + * Returns the old_timeval32 representation of the nsec parameter. + */ +static inline struct old_timeval32 ns_to_old_timeval32(s64 nsec) +{ + struct __kernel_old_timeval tv; + struct old_timeval32 ctv; + + tv = ns_to_kernel_old_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); + +#ifdef CONFIG_COMPAT + +/* + * 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 + +#else /* !CONFIG_COMPAT */ #define is_compat_task() (0) +/* Ensure no one redefines in_compat_syscall() under !CONFIG_COMPAT */ +#define in_compat_syscall in_compat_syscall +static inline bool in_compat_syscall(void) { return false; } #endif /* CONFIG_COMPAT */ + +#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); + +/* + * Some legacy ABIs like the i386 one use less than natural alignment for 64-bit + * types, and will need special compat treatment for that. Most architectures + * don't need that special handling even for compat syscalls. + */ +#ifndef compat_need_64bit_alignment_fixup +#define compat_need_64bit_alignment_fixup() false +#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. + */ +#ifndef compat_ptr +static inline void __user *compat_ptr(compat_uptr_t uptr) +{ + return (void __user *)(unsigned long)uptr; +} +#endif + +static inline compat_uptr_t ptr_to_compat(void __user *uptr) +{ + return (u32)(unsigned long)uptr; +} + #endif /* _LINUX_COMPAT_H */ |