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Diffstat (limited to 'include/linux/compat.h')
| -rw-r--r-- | include/linux/compat.h | 1054 |
1 files changed, 1054 insertions, 0 deletions
diff --git a/include/linux/compat.h b/include/linux/compat.h new file mode 100644 index 000000000..594357881 --- /dev/null +++ b/include/linux/compat.h @@ -0,0 +1,1054 @@ +/* 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/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> +#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) ((__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__)) \ + __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() +#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; + +struct compat_sel_arg_struct; +struct rusage; + +struct old_itimerval32; + +struct compat_tms { + compat_clock_t tms_utime; + compat_clock_t tms_stime; + compat_clock_t tms_cutime; + compat_clock_t tms_cstime; +}; + +#define _COMPAT_NSIG_WORDS (_COMPAT_NSIG / _COMPAT_NSIG_BPW) + +#ifndef compat_sigset_t +typedef struct { + compat_sigset_word sig[_COMPAT_NSIG_WORDS]; +} compat_sigset_t; +#endif + +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; + 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. */ +#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 old_timeval32 ru_utime; + struct old_timeval32 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_stat; +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; + +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); + +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) */ +#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 +} + +#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, + 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 */ + +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); + +/* + * 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_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); + +/* 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); +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); + +/* 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/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); +/* 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 + +/* 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_time32(int n, compat_ulong_t __user *inp, + compat_ulong_t __user *outp, + compat_ulong_t __user *exp, + struct old_timespec32 __user *tsp, + void __user *sig); +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 __kernel_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/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 */ + +/* 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_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/itimer.c */ +asmlinkage long compat_sys_getitimer(int which, + struct old_itimerval32 __user *it); +asmlinkage long compat_sys_setitimer(int which, + struct old_itimerval32 __user *in, + struct old_itimerval32 __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); + +/* 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); + +/* 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_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 */ + +/* 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 old_timeval32 __user *tv, + struct timezone __user *tz); +asmlinkage long compat_sys_settimeofday(struct old_timeval32 __user *tv, + struct timezone __user *tz); + +/* 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_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); + +/* 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_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_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: 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: net/socket.c */ +asmlinkage long compat_sys_socketcall(int call, u32 __user *args); + +#ifdef __ARCH_WANT_COMPAT_TRUNCATE64 +asmlinkage long compat_sys_truncate64(const char __user *pathname, compat_arg_u64(len)); +#endif + +#ifdef __ARCH_WANT_COMPAT_FTRUNCATE64 +asmlinkage long compat_sys_ftruncate64(unsigned int fd, compat_arg_u64(len)); +#endif + +#ifdef __ARCH_WANT_COMPAT_FALLOCATE +asmlinkage long compat_sys_fallocate(int fd, int mode, compat_arg_u64(offset), + compat_arg_u64(len)); +#endif + +#ifdef __ARCH_WANT_COMPAT_PREAD64 +asmlinkage long compat_sys_pread64(unsigned int fd, char __user *buf, size_t count, + compat_arg_u64(pos)); +#endif + +#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 + +#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 + +#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 */ |