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1/* SPDX-License-Identifier: GPL-2.0 */2#ifndef _LINUX_COMPAT_H3#define _LINUX_COMPAT_H4/*5 * These are the type definitions for the architecture specific6 * syscall compatibility layer.7 */8 9#include <linux/types.h>10#include <linux/time.h>11 12#include <linux/stat.h>13#include <linux/param.h> /* for HZ */14#include <linux/sem.h>15#include <linux/socket.h>16#include <linux/if.h>17#include <linux/fs.h>18#include <linux/aio_abi.h> /* for aio_context_t */19#include <linux/uaccess.h>20#include <linux/unistd.h>21 22#include <asm/compat.h>23#include <asm/siginfo.h>24#include <asm/signal.h>25 26#ifdef CONFIG_ARCH_HAS_SYSCALL_WRAPPER27/*28 * It may be useful for an architecture to override the definitions of the29 * COMPAT_SYSCALL_DEFINE0 and COMPAT_SYSCALL_DEFINEx() macros, in particular30 * to use a different calling convention for syscalls. To allow for that,31 + the prototypes for the compat_sys_*() functions below will *not* be included32 * if CONFIG_ARCH_HAS_SYSCALL_WRAPPER is enabled.33 */34#include <asm/syscall_wrapper.h>35#endif /* CONFIG_ARCH_HAS_SYSCALL_WRAPPER */36 37#ifndef COMPAT_USE_64BIT_TIME38#define COMPAT_USE_64BIT_TIME 039#endif40 41#ifndef __SC_DELOUSE42#define __SC_DELOUSE(t,v) ((__force t)(unsigned long)(v))43#endif44 45#ifndef COMPAT_SYSCALL_DEFINE046#define COMPAT_SYSCALL_DEFINE0(name) \47 asmlinkage long compat_sys_##name(void); \48 ALLOW_ERROR_INJECTION(compat_sys_##name, ERRNO); \49 asmlinkage long compat_sys_##name(void)50#endif /* COMPAT_SYSCALL_DEFINE0 */51 52#define COMPAT_SYSCALL_DEFINE1(name, ...) \53 COMPAT_SYSCALL_DEFINEx(1, _##name, __VA_ARGS__)54#define COMPAT_SYSCALL_DEFINE2(name, ...) \55 COMPAT_SYSCALL_DEFINEx(2, _##name, __VA_ARGS__)56#define COMPAT_SYSCALL_DEFINE3(name, ...) \57 COMPAT_SYSCALL_DEFINEx(3, _##name, __VA_ARGS__)58#define COMPAT_SYSCALL_DEFINE4(name, ...) \59 COMPAT_SYSCALL_DEFINEx(4, _##name, __VA_ARGS__)60#define COMPAT_SYSCALL_DEFINE5(name, ...) \61 COMPAT_SYSCALL_DEFINEx(5, _##name, __VA_ARGS__)62#define COMPAT_SYSCALL_DEFINE6(name, ...) \63 COMPAT_SYSCALL_DEFINEx(6, _##name, __VA_ARGS__)64 65/*66 * The asmlinkage stub is aliased to a function named __se_compat_sys_*() which67 * sign-extends 32-bit ints to longs whenever needed. The actual work is68 * done within __do_compat_sys_*().69 */70#ifndef COMPAT_SYSCALL_DEFINEx71#define COMPAT_SYSCALL_DEFINEx(x, name, ...) \72 __diag_push(); \73 __diag_ignore(GCC, 8, "-Wattribute-alias", \74 "Type aliasing is used to sanitize syscall arguments");\75 asmlinkage long compat_sys##name(__MAP(x,__SC_DECL,__VA_ARGS__)) \76 __attribute__((alias(__stringify(__se_compat_sys##name)))); \77 ALLOW_ERROR_INJECTION(compat_sys##name, ERRNO); \78 static inline long __do_compat_sys##name(__MAP(x,__SC_DECL,__VA_ARGS__));\79 asmlinkage long __se_compat_sys##name(__MAP(x,__SC_LONG,__VA_ARGS__)); \80 asmlinkage long __se_compat_sys##name(__MAP(x,__SC_LONG,__VA_ARGS__)) \81 { \82 long ret = __do_compat_sys##name(__MAP(x,__SC_DELOUSE,__VA_ARGS__));\83 __MAP(x,__SC_TEST,__VA_ARGS__); \84 return ret; \85 } \86 __diag_pop(); \87 static inline long __do_compat_sys##name(__MAP(x,__SC_DECL,__VA_ARGS__))88#endif /* COMPAT_SYSCALL_DEFINEx */89 90struct compat_iovec {91 compat_uptr_t iov_base;92 compat_size_t iov_len;93};94 95#ifndef compat_user_stack_pointer96#define compat_user_stack_pointer() current_user_stack_pointer()97#endif98#ifndef compat_sigaltstack /* we'll need that for MIPS */99typedef struct compat_sigaltstack {100 compat_uptr_t ss_sp;101 int ss_flags;102 compat_size_t ss_size;103} compat_stack_t;104#endif105#ifndef COMPAT_MINSIGSTKSZ106#define COMPAT_MINSIGSTKSZ MINSIGSTKSZ107#endif108 109#define compat_jiffies_to_clock_t(x) \110 (((unsigned long)(x) * COMPAT_USER_HZ) / HZ)111 112typedef __compat_uid32_t compat_uid_t;113typedef __compat_gid32_t compat_gid_t;114 115struct compat_sel_arg_struct;116struct rusage;117 118struct old_itimerval32;119 120struct compat_tms {121 compat_clock_t tms_utime;122 compat_clock_t tms_stime;123 compat_clock_t tms_cutime;124 compat_clock_t tms_cstime;125};126 127#define _COMPAT_NSIG_WORDS (_COMPAT_NSIG / _COMPAT_NSIG_BPW)128 129typedef struct {130 compat_sigset_word sig[_COMPAT_NSIG_WORDS];131} compat_sigset_t;132 133int set_compat_user_sigmask(const compat_sigset_t __user *umask,134 size_t sigsetsize);135 136struct compat_sigaction {137#ifndef __ARCH_HAS_IRIX_SIGACTION138 compat_uptr_t sa_handler;139 compat_ulong_t sa_flags;140#else141 compat_uint_t sa_flags;142 compat_uptr_t sa_handler;143#endif144#ifdef __ARCH_HAS_SA_RESTORER145 compat_uptr_t sa_restorer;146#endif147 compat_sigset_t sa_mask __packed;148};149 150typedef union compat_sigval {151 compat_int_t sival_int;152 compat_uptr_t sival_ptr;153} compat_sigval_t;154 155typedef struct compat_siginfo {156 int si_signo;157#ifndef __ARCH_HAS_SWAPPED_SIGINFO158 int si_errno;159 int si_code;160#else161 int si_code;162 int si_errno;163#endif164 165 union {166 int _pad[128/sizeof(int) - 3];167 168 /* kill() */169 struct {170 compat_pid_t _pid; /* sender's pid */171 __compat_uid32_t _uid; /* sender's uid */172 } _kill;173 174 /* POSIX.1b timers */175 struct {176 compat_timer_t _tid; /* timer id */177 int _overrun; /* overrun count */178 compat_sigval_t _sigval; /* same as below */179 } _timer;180 181 /* POSIX.1b signals */182 struct {183 compat_pid_t _pid; /* sender's pid */184 __compat_uid32_t _uid; /* sender's uid */185 compat_sigval_t _sigval;186 } _rt;187 188 /* SIGCHLD */189 struct {190 compat_pid_t _pid; /* which child */191 __compat_uid32_t _uid; /* sender's uid */192 int _status; /* exit code */193 compat_clock_t _utime;194 compat_clock_t _stime;195 } _sigchld;196 197#ifdef CONFIG_X86_X32_ABI198 /* SIGCHLD (x32 version) */199 struct {200 compat_pid_t _pid; /* which child */201 __compat_uid32_t _uid; /* sender's uid */202 int _status; /* exit code */203 compat_s64 _utime;204 compat_s64 _stime;205 } _sigchld_x32;206#endif207 208 /* SIGILL, SIGFPE, SIGSEGV, SIGBUS, SIGTRAP, SIGEMT */209 struct {210 compat_uptr_t _addr; /* faulting insn/memory ref. */211#define __COMPAT_ADDR_BND_PKEY_PAD (__alignof__(compat_uptr_t) < sizeof(short) ? \212 sizeof(short) : __alignof__(compat_uptr_t))213 union {214 /* used on alpha and sparc */215 int _trapno; /* TRAP # which caused the signal */216 /*217 * used when si_code=BUS_MCEERR_AR or218 * used when si_code=BUS_MCEERR_AO219 */220 short int _addr_lsb; /* Valid LSB of the reported address. */221 /* used when si_code=SEGV_BNDERR */222 struct {223 char _dummy_bnd[__COMPAT_ADDR_BND_PKEY_PAD];224 compat_uptr_t _lower;225 compat_uptr_t _upper;226 } _addr_bnd;227 /* used when si_code=SEGV_PKUERR */228 struct {229 char _dummy_pkey[__COMPAT_ADDR_BND_PKEY_PAD];230 u32 _pkey;231 } _addr_pkey;232 /* used when si_code=TRAP_PERF */233 struct {234 compat_ulong_t _data;235 u32 _type;236 u32 _flags;237 } _perf;238 };239 } _sigfault;240 241 /* SIGPOLL */242 struct {243 compat_long_t _band; /* POLL_IN, POLL_OUT, POLL_MSG */244 int _fd;245 } _sigpoll;246 247 struct {248 compat_uptr_t _call_addr; /* calling user insn */249 int _syscall; /* triggering system call number */250 unsigned int _arch; /* AUDIT_ARCH_* of syscall */251 } _sigsys;252 } _sifields;253} compat_siginfo_t;254 255struct compat_rlimit {256 compat_ulong_t rlim_cur;257 compat_ulong_t rlim_max;258};259 260#ifdef __ARCH_NEED_COMPAT_FLOCK64_PACKED261#define __ARCH_COMPAT_FLOCK64_PACK __attribute__((packed))262#else263#define __ARCH_COMPAT_FLOCK64_PACK264#endif265 266struct compat_flock {267 short l_type;268 short l_whence;269 compat_off_t l_start;270 compat_off_t l_len;271#ifdef __ARCH_COMPAT_FLOCK_EXTRA_SYSID272 __ARCH_COMPAT_FLOCK_EXTRA_SYSID273#endif274 compat_pid_t l_pid;275#ifdef __ARCH_COMPAT_FLOCK_PAD276 __ARCH_COMPAT_FLOCK_PAD277#endif278};279 280struct compat_flock64 {281 short l_type;282 short l_whence;283 compat_loff_t l_start;284 compat_loff_t l_len;285 compat_pid_t l_pid;286#ifdef __ARCH_COMPAT_FLOCK64_PAD287 __ARCH_COMPAT_FLOCK64_PAD288#endif289} __ARCH_COMPAT_FLOCK64_PACK;290 291struct compat_rusage {292 struct old_timeval32 ru_utime;293 struct old_timeval32 ru_stime;294 compat_long_t ru_maxrss;295 compat_long_t ru_ixrss;296 compat_long_t ru_idrss;297 compat_long_t ru_isrss;298 compat_long_t ru_minflt;299 compat_long_t ru_majflt;300 compat_long_t ru_nswap;301 compat_long_t ru_inblock;302 compat_long_t ru_oublock;303 compat_long_t ru_msgsnd;304 compat_long_t ru_msgrcv;305 compat_long_t ru_nsignals;306 compat_long_t ru_nvcsw;307 compat_long_t ru_nivcsw;308};309 310extern int put_compat_rusage(const struct rusage *,311 struct compat_rusage __user *);312 313struct compat_siginfo;314struct __compat_aio_sigset;315 316struct compat_dirent {317 u32 d_ino;318 compat_off_t d_off;319 u16 d_reclen;320 char d_name[256];321};322 323struct compat_ustat {324 compat_daddr_t f_tfree;325 compat_ino_t f_tinode;326 char f_fname[6];327 char f_fpack[6];328};329 330#define COMPAT_SIGEV_PAD_SIZE ((SIGEV_MAX_SIZE/sizeof(int)) - 3)331 332typedef struct compat_sigevent {333 compat_sigval_t sigev_value;334 compat_int_t sigev_signo;335 compat_int_t sigev_notify;336 union {337 compat_int_t _pad[COMPAT_SIGEV_PAD_SIZE];338 compat_int_t _tid;339 340 struct {341 compat_uptr_t _function;342 compat_uptr_t _attribute;343 } _sigev_thread;344 } _sigev_un;345} compat_sigevent_t;346 347struct compat_ifmap {348 compat_ulong_t mem_start;349 compat_ulong_t mem_end;350 unsigned short base_addr;351 unsigned char irq;352 unsigned char dma;353 unsigned char port;354};355 356struct compat_if_settings {357 unsigned int type; /* Type of physical device or protocol */358 unsigned int size; /* Size of the data allocated by the caller */359 compat_uptr_t ifs_ifsu; /* union of pointers */360};361 362struct compat_ifreq {363 union {364 char ifrn_name[IFNAMSIZ]; /* if name, e.g. "en0" */365 } ifr_ifrn;366 union {367 struct sockaddr ifru_addr;368 struct sockaddr ifru_dstaddr;369 struct sockaddr ifru_broadaddr;370 struct sockaddr ifru_netmask;371 struct sockaddr ifru_hwaddr;372 short ifru_flags;373 compat_int_t ifru_ivalue;374 compat_int_t ifru_mtu;375 struct compat_ifmap ifru_map;376 char ifru_slave[IFNAMSIZ]; /* Just fits the size */377 char ifru_newname[IFNAMSIZ];378 compat_caddr_t ifru_data;379 struct compat_if_settings ifru_settings;380 } ifr_ifru;381};382 383struct compat_ifconf {384 compat_int_t ifc_len; /* size of buffer */385 compat_caddr_t ifcbuf;386};387 388struct compat_robust_list {389 compat_uptr_t next;390};391 392struct compat_robust_list_head {393 struct compat_robust_list list;394 compat_long_t futex_offset;395 compat_uptr_t list_op_pending;396};397 398#ifdef CONFIG_COMPAT_OLD_SIGACTION399struct compat_old_sigaction {400 compat_uptr_t sa_handler;401 compat_old_sigset_t sa_mask;402 compat_ulong_t sa_flags;403 compat_uptr_t sa_restorer;404};405#endif406 407struct compat_keyctl_kdf_params {408 compat_uptr_t hashname;409 compat_uptr_t otherinfo;410 __u32 otherinfolen;411 __u32 __spare[8];412};413 414struct compat_stat;415struct compat_statfs;416struct compat_statfs64;417struct compat_old_linux_dirent;418struct compat_linux_dirent;419struct linux_dirent64;420struct compat_msghdr;421struct compat_mmsghdr;422struct compat_sysinfo;423struct compat_sysctl_args;424struct compat_kexec_segment;425struct compat_mq_attr;426struct compat_msgbuf;427 428void copy_siginfo_to_external32(struct compat_siginfo *to,429 const struct kernel_siginfo *from);430int copy_siginfo_from_user32(kernel_siginfo_t *to,431 const struct compat_siginfo __user *from);432int __copy_siginfo_to_user32(struct compat_siginfo __user *to,433 const kernel_siginfo_t *from);434#ifndef copy_siginfo_to_user32435#define copy_siginfo_to_user32 __copy_siginfo_to_user32436#endif437int get_compat_sigevent(struct sigevent *event,438 const struct compat_sigevent __user *u_event);439 440extern int get_compat_sigset(sigset_t *set, const compat_sigset_t __user *compat);441 442/*443 * Defined inline such that size can be compile time constant, which avoids444 * CONFIG_HARDENED_USERCOPY complaining about copies from task_struct445 */446static inline int447put_compat_sigset(compat_sigset_t __user *compat, const sigset_t *set,448 unsigned int size)449{450 /* size <= sizeof(compat_sigset_t) <= sizeof(sigset_t) */451#if defined(__BIG_ENDIAN) && defined(CONFIG_64BIT)452 compat_sigset_t v;453 switch (_NSIG_WORDS) {454 case 4: v.sig[7] = (set->sig[3] >> 32); v.sig[6] = set->sig[3];455 fallthrough;456 case 3: v.sig[5] = (set->sig[2] >> 32); v.sig[4] = set->sig[2];457 fallthrough;458 case 2: v.sig[3] = (set->sig[1] >> 32); v.sig[2] = set->sig[1];459 fallthrough;460 case 1: v.sig[1] = (set->sig[0] >> 32); v.sig[0] = set->sig[0];461 }462 return copy_to_user(compat, &v, size) ? -EFAULT : 0;463#else464 return copy_to_user(compat, set, size) ? -EFAULT : 0;465#endif466}467 468#ifdef CONFIG_CPU_BIG_ENDIAN469#define unsafe_put_compat_sigset(compat, set, label) do { \470 compat_sigset_t __user *__c = compat; \471 const sigset_t *__s = set; \472 \473 switch (_NSIG_WORDS) { \474 case 4: \475 unsafe_put_user(__s->sig[3] >> 32, &__c->sig[7], label); \476 unsafe_put_user(__s->sig[3], &__c->sig[6], label); \477 fallthrough; \478 case 3: \479 unsafe_put_user(__s->sig[2] >> 32, &__c->sig[5], label); \480 unsafe_put_user(__s->sig[2], &__c->sig[4], label); \481 fallthrough; \482 case 2: \483 unsafe_put_user(__s->sig[1] >> 32, &__c->sig[3], label); \484 unsafe_put_user(__s->sig[1], &__c->sig[2], label); \485 fallthrough; \486 case 1: \487 unsafe_put_user(__s->sig[0] >> 32, &__c->sig[1], label); \488 unsafe_put_user(__s->sig[0], &__c->sig[0], label); \489 } \490} while (0)491 492#define unsafe_get_compat_sigset(set, compat, label) do { \493 const compat_sigset_t __user *__c = compat; \494 compat_sigset_word hi, lo; \495 sigset_t *__s = set; \496 \497 switch (_NSIG_WORDS) { \498 case 4: \499 unsafe_get_user(lo, &__c->sig[7], label); \500 unsafe_get_user(hi, &__c->sig[6], label); \501 __s->sig[3] = hi | (((long)lo) << 32); \502 fallthrough; \503 case 3: \504 unsafe_get_user(lo, &__c->sig[5], label); \505 unsafe_get_user(hi, &__c->sig[4], label); \506 __s->sig[2] = hi | (((long)lo) << 32); \507 fallthrough; \508 case 2: \509 unsafe_get_user(lo, &__c->sig[3], label); \510 unsafe_get_user(hi, &__c->sig[2], label); \511 __s->sig[1] = hi | (((long)lo) << 32); \512 fallthrough; \513 case 1: \514 unsafe_get_user(lo, &__c->sig[1], label); \515 unsafe_get_user(hi, &__c->sig[0], label); \516 __s->sig[0] = hi | (((long)lo) << 32); \517 } \518} while (0)519#else520#define unsafe_put_compat_sigset(compat, set, label) do { \521 compat_sigset_t __user *__c = compat; \522 const sigset_t *__s = set; \523 \524 unsafe_copy_to_user(__c, __s, sizeof(*__c), label); \525} while (0)526 527#define unsafe_get_compat_sigset(set, compat, label) do { \528 const compat_sigset_t __user *__c = compat; \529 sigset_t *__s = set; \530 \531 unsafe_copy_from_user(__s, __c, sizeof(*__c), label); \532} while (0)533#endif534 535extern int compat_ptrace_request(struct task_struct *child,536 compat_long_t request,537 compat_ulong_t addr, compat_ulong_t data);538 539extern long compat_arch_ptrace(struct task_struct *child, compat_long_t request,540 compat_ulong_t addr, compat_ulong_t data);541 542struct epoll_event; /* fortunately, this one is fixed-layout */543 544int compat_restore_altstack(const compat_stack_t __user *uss);545int __compat_save_altstack(compat_stack_t __user *, unsigned long);546#define unsafe_compat_save_altstack(uss, sp, label) do { \547 compat_stack_t __user *__uss = uss; \548 struct task_struct *t = current; \549 unsafe_put_user(ptr_to_compat((void __user *)t->sas_ss_sp), \550 &__uss->ss_sp, label); \551 unsafe_put_user(t->sas_ss_flags, &__uss->ss_flags, label); \552 unsafe_put_user(t->sas_ss_size, &__uss->ss_size, label); \553} while (0);554 555/*556 * These syscall function prototypes are kept in the same order as557 * include/uapi/asm-generic/unistd.h. Deprecated or obsolete system calls558 * go below.559 *560 * Please note that these prototypes here are only provided for information561 * purposes, for static analysis, and for linking from the syscall table.562 * These functions should not be called elsewhere from kernel code.563 *564 * As the syscall calling convention may be different from the default565 * for architectures overriding the syscall calling convention, do not566 * include the prototypes if CONFIG_ARCH_HAS_SYSCALL_WRAPPER is enabled.567 */568#ifndef CONFIG_ARCH_HAS_SYSCALL_WRAPPER569asmlinkage long compat_sys_io_setup(unsigned nr_reqs, u32 __user *ctx32p);570asmlinkage long compat_sys_io_submit(compat_aio_context_t ctx_id, int nr,571 u32 __user *iocb);572asmlinkage long compat_sys_io_pgetevents(compat_aio_context_t ctx_id,573 compat_long_t min_nr,574 compat_long_t nr,575 struct io_event __user *events,576 struct old_timespec32 __user *timeout,577 const struct __compat_aio_sigset __user *usig);578asmlinkage long compat_sys_io_pgetevents_time64(compat_aio_context_t ctx_id,579 compat_long_t min_nr,580 compat_long_t nr,581 struct io_event __user *events,582 struct __kernel_timespec __user *timeout,583 const struct __compat_aio_sigset __user *usig);584asmlinkage long compat_sys_epoll_pwait(int epfd,585 struct epoll_event __user *events,586 int maxevents, int timeout,587 const compat_sigset_t __user *sigmask,588 compat_size_t sigsetsize);589asmlinkage long compat_sys_epoll_pwait2(int epfd,590 struct epoll_event __user *events,591 int maxevents,592 const struct __kernel_timespec __user *timeout,593 const compat_sigset_t __user *sigmask,594 compat_size_t sigsetsize);595asmlinkage long compat_sys_fcntl(unsigned int fd, unsigned int cmd,596 compat_ulong_t arg);597asmlinkage long compat_sys_fcntl64(unsigned int fd, unsigned int cmd,598 compat_ulong_t arg);599asmlinkage long compat_sys_ioctl(unsigned int fd, unsigned int cmd,600 compat_ulong_t arg);601asmlinkage long compat_sys_statfs(const char __user *pathname,602 struct compat_statfs __user *buf);603asmlinkage long compat_sys_statfs64(const char __user *pathname,604 compat_size_t sz,605 struct compat_statfs64 __user *buf);606asmlinkage long compat_sys_fstatfs(unsigned int fd,607 struct compat_statfs __user *buf);608asmlinkage long compat_sys_fstatfs64(unsigned int fd, compat_size_t sz,609 struct compat_statfs64 __user *buf);610asmlinkage long compat_sys_truncate(const char __user *, compat_off_t);611asmlinkage long compat_sys_ftruncate(unsigned int, compat_off_t);612/* No generic prototype for truncate64, ftruncate64, fallocate */613asmlinkage long compat_sys_openat(int dfd, const char __user *filename,614 int flags, umode_t mode);615asmlinkage long compat_sys_getdents(unsigned int fd,616 struct compat_linux_dirent __user *dirent,617 unsigned int count);618asmlinkage long compat_sys_lseek(unsigned int, compat_off_t, unsigned int);619/* No generic prototype for pread64 and pwrite64 */620asmlinkage ssize_t compat_sys_preadv(compat_ulong_t fd,621 const struct iovec __user *vec,622 compat_ulong_t vlen, u32 pos_low, u32 pos_high);623asmlinkage ssize_t compat_sys_pwritev(compat_ulong_t fd,624 const struct iovec __user *vec,625 compat_ulong_t vlen, u32 pos_low, u32 pos_high);626#ifdef __ARCH_WANT_COMPAT_SYS_PREADV64627asmlinkage long compat_sys_preadv64(unsigned long fd,628 const struct iovec __user *vec,629 unsigned long vlen, loff_t pos);630#endif631 632#ifdef __ARCH_WANT_COMPAT_SYS_PWRITEV64633asmlinkage long compat_sys_pwritev64(unsigned long fd,634 const struct iovec __user *vec,635 unsigned long vlen, loff_t pos);636#endif637asmlinkage long compat_sys_sendfile(int out_fd, int in_fd,638 compat_off_t __user *offset, compat_size_t count);639asmlinkage long compat_sys_sendfile64(int out_fd, int in_fd,640 compat_loff_t __user *offset, compat_size_t count);641asmlinkage long compat_sys_pselect6_time32(int n, compat_ulong_t __user *inp,642 compat_ulong_t __user *outp,643 compat_ulong_t __user *exp,644 struct old_timespec32 __user *tsp,645 void __user *sig);646asmlinkage long compat_sys_pselect6_time64(int n, compat_ulong_t __user *inp,647 compat_ulong_t __user *outp,648 compat_ulong_t __user *exp,649 struct __kernel_timespec __user *tsp,650 void __user *sig);651asmlinkage long compat_sys_ppoll_time32(struct pollfd __user *ufds,652 unsigned int nfds,653 struct old_timespec32 __user *tsp,654 const compat_sigset_t __user *sigmask,655 compat_size_t sigsetsize);656asmlinkage long compat_sys_ppoll_time64(struct pollfd __user *ufds,657 unsigned int nfds,658 struct __kernel_timespec __user *tsp,659 const compat_sigset_t __user *sigmask,660 compat_size_t sigsetsize);661asmlinkage long compat_sys_signalfd4(int ufd,662 const compat_sigset_t __user *sigmask,663 compat_size_t sigsetsize, int flags);664asmlinkage long compat_sys_newfstatat(unsigned int dfd,665 const char __user *filename,666 struct compat_stat __user *statbuf,667 int flag);668asmlinkage long compat_sys_newfstat(unsigned int fd,669 struct compat_stat __user *statbuf);670/* No generic prototype for sync_file_range and sync_file_range2 */671asmlinkage long compat_sys_waitid(int, compat_pid_t,672 struct compat_siginfo __user *, int,673 struct compat_rusage __user *);674asmlinkage long675compat_sys_set_robust_list(struct compat_robust_list_head __user *head,676 compat_size_t len);677asmlinkage long678compat_sys_get_robust_list(int pid, compat_uptr_t __user *head_ptr,679 compat_size_t __user *len_ptr);680asmlinkage long compat_sys_getitimer(int which,681 struct old_itimerval32 __user *it);682asmlinkage long compat_sys_setitimer(int which,683 struct old_itimerval32 __user *in,684 struct old_itimerval32 __user *out);685asmlinkage long compat_sys_kexec_load(compat_ulong_t entry,686 compat_ulong_t nr_segments,687 struct compat_kexec_segment __user *,688 compat_ulong_t flags);689asmlinkage long compat_sys_timer_create(clockid_t which_clock,690 struct compat_sigevent __user *timer_event_spec,691 timer_t __user *created_timer_id);692asmlinkage long compat_sys_ptrace(compat_long_t request, compat_long_t pid,693 compat_long_t addr, compat_long_t data);694asmlinkage long compat_sys_sched_setaffinity(compat_pid_t pid,695 unsigned int len,696 compat_ulong_t __user *user_mask_ptr);697asmlinkage long compat_sys_sched_getaffinity(compat_pid_t pid,698 unsigned int len,699 compat_ulong_t __user *user_mask_ptr);700asmlinkage long compat_sys_sigaltstack(const compat_stack_t __user *uss_ptr,701 compat_stack_t __user *uoss_ptr);702asmlinkage long compat_sys_rt_sigsuspend(compat_sigset_t __user *unewset,703 compat_size_t sigsetsize);704#ifndef CONFIG_ODD_RT_SIGACTION705asmlinkage long compat_sys_rt_sigaction(int,706 const struct compat_sigaction __user *,707 struct compat_sigaction __user *,708 compat_size_t);709#endif710asmlinkage long compat_sys_rt_sigprocmask(int how, compat_sigset_t __user *set,711 compat_sigset_t __user *oset,712 compat_size_t sigsetsize);713asmlinkage long compat_sys_rt_sigpending(compat_sigset_t __user *uset,714 compat_size_t sigsetsize);715asmlinkage long compat_sys_rt_sigtimedwait_time32(compat_sigset_t __user *uthese,716 struct compat_siginfo __user *uinfo,717 struct old_timespec32 __user *uts, compat_size_t sigsetsize);718asmlinkage long compat_sys_rt_sigtimedwait_time64(compat_sigset_t __user *uthese,719 struct compat_siginfo __user *uinfo,720 struct __kernel_timespec __user *uts, compat_size_t sigsetsize);721asmlinkage long compat_sys_rt_sigqueueinfo(compat_pid_t pid, int sig,722 struct compat_siginfo __user *uinfo);723/* No generic prototype for rt_sigreturn */724asmlinkage long compat_sys_times(struct compat_tms __user *tbuf);725asmlinkage long compat_sys_getrlimit(unsigned int resource,726 struct compat_rlimit __user *rlim);727asmlinkage long compat_sys_setrlimit(unsigned int resource,728 struct compat_rlimit __user *rlim);729asmlinkage long compat_sys_getrusage(int who, struct compat_rusage __user *ru);730asmlinkage long compat_sys_gettimeofday(struct old_timeval32 __user *tv,731 struct timezone __user *tz);732asmlinkage long compat_sys_settimeofday(struct old_timeval32 __user *tv,733 struct timezone __user *tz);734asmlinkage long compat_sys_sysinfo(struct compat_sysinfo __user *info);735asmlinkage long compat_sys_mq_open(const char __user *u_name,736 int oflag, compat_mode_t mode,737 struct compat_mq_attr __user *u_attr);738asmlinkage long compat_sys_mq_notify(mqd_t mqdes,739 const struct compat_sigevent __user *u_notification);740asmlinkage long compat_sys_mq_getsetattr(mqd_t mqdes,741 const struct compat_mq_attr __user *u_mqstat,742 struct compat_mq_attr __user *u_omqstat);743asmlinkage long compat_sys_msgctl(int first, int second, void __user *uptr);744asmlinkage long compat_sys_msgrcv(int msqid, compat_uptr_t msgp,745 compat_ssize_t msgsz, compat_long_t msgtyp, int msgflg);746asmlinkage long compat_sys_msgsnd(int msqid, compat_uptr_t msgp,747 compat_ssize_t msgsz, int msgflg);748asmlinkage long compat_sys_semctl(int semid, int semnum, int cmd, int arg);749asmlinkage long compat_sys_shmctl(int first, int second, void __user *uptr);750asmlinkage long compat_sys_shmat(int shmid, compat_uptr_t shmaddr, int shmflg);751asmlinkage long compat_sys_recvfrom(int fd, void __user *buf, compat_size_t len,752 unsigned flags, struct sockaddr __user *addr,753 int __user *addrlen);754asmlinkage long compat_sys_sendmsg(int fd, struct compat_msghdr __user *msg,755 unsigned flags);756asmlinkage long compat_sys_recvmsg(int fd, struct compat_msghdr __user *msg,757 unsigned int flags);758/* No generic prototype for readahead */759asmlinkage long compat_sys_keyctl(u32 option,760 u32 arg2, u32 arg3, u32 arg4, u32 arg5);761asmlinkage long compat_sys_execve(const char __user *filename, const compat_uptr_t __user *argv,762 const compat_uptr_t __user *envp);763/* No generic prototype for fadvise64_64 */764/* CONFIG_MMU only */765asmlinkage long compat_sys_rt_tgsigqueueinfo(compat_pid_t tgid,766 compat_pid_t pid, int sig,767 struct compat_siginfo __user *uinfo);768asmlinkage long compat_sys_recvmmsg_time64(int fd, struct compat_mmsghdr __user *mmsg,769 unsigned vlen, unsigned int flags,770 struct __kernel_timespec __user *timeout);771asmlinkage long compat_sys_recvmmsg_time32(int fd, struct compat_mmsghdr __user *mmsg,772 unsigned vlen, unsigned int flags,773 struct old_timespec32 __user *timeout);774asmlinkage long compat_sys_wait4(compat_pid_t pid,775 compat_uint_t __user *stat_addr, int options,776 struct compat_rusage __user *ru);777asmlinkage long compat_sys_fanotify_mark(int, unsigned int, __u32, __u32,778 int, const char __user *);779asmlinkage long compat_sys_open_by_handle_at(int mountdirfd,780 struct file_handle __user *handle,781 int flags);782asmlinkage long compat_sys_sendmmsg(int fd, struct compat_mmsghdr __user *mmsg,783 unsigned vlen, unsigned int flags);784asmlinkage long compat_sys_execveat(int dfd, const char __user *filename,785 const compat_uptr_t __user *argv,786 const compat_uptr_t __user *envp, int flags);787asmlinkage ssize_t compat_sys_preadv2(compat_ulong_t fd,788 const struct iovec __user *vec,789 compat_ulong_t vlen, u32 pos_low, u32 pos_high, rwf_t flags);790asmlinkage ssize_t compat_sys_pwritev2(compat_ulong_t fd,791 const struct iovec __user *vec,792 compat_ulong_t vlen, u32 pos_low, u32 pos_high, rwf_t flags);793#ifdef __ARCH_WANT_COMPAT_SYS_PREADV64V2794asmlinkage long compat_sys_preadv64v2(unsigned long fd,795 const struct iovec __user *vec,796 unsigned long vlen, loff_t pos, rwf_t flags);797#endif798 799#ifdef __ARCH_WANT_COMPAT_SYS_PWRITEV64V2800asmlinkage long compat_sys_pwritev64v2(unsigned long fd,801 const struct iovec __user *vec,802 unsigned long vlen, loff_t pos, rwf_t flags);803#endif804 805 806/*807 * Deprecated system calls which are still defined in808 * include/uapi/asm-generic/unistd.h and wanted by >= 1 arch809 */810 811/* __ARCH_WANT_SYSCALL_NO_AT */812asmlinkage long compat_sys_open(const char __user *filename, int flags,813 umode_t mode);814 815/* __ARCH_WANT_SYSCALL_NO_FLAGS */816asmlinkage long compat_sys_signalfd(int ufd,817 const compat_sigset_t __user *sigmask,818 compat_size_t sigsetsize);819 820/* __ARCH_WANT_SYSCALL_OFF_T */821asmlinkage long compat_sys_newstat(const char __user *filename,822 struct compat_stat __user *statbuf);823asmlinkage long compat_sys_newlstat(const char __user *filename,824 struct compat_stat __user *statbuf);825 826/* __ARCH_WANT_SYSCALL_DEPRECATED */827asmlinkage long compat_sys_select(int n, compat_ulong_t __user *inp,828 compat_ulong_t __user *outp, compat_ulong_t __user *exp,829 struct old_timeval32 __user *tvp);830asmlinkage long compat_sys_ustat(unsigned dev, struct compat_ustat __user *u32);831asmlinkage long compat_sys_recv(int fd, void __user *buf, compat_size_t len,832 unsigned flags);833 834/* obsolete */835asmlinkage long compat_sys_old_readdir(unsigned int fd,836 struct compat_old_linux_dirent __user *,837 unsigned int count);838 839/* obsolete */840asmlinkage long compat_sys_old_select(struct compat_sel_arg_struct __user *arg);841 842/* obsolete */843asmlinkage long compat_sys_ipc(u32, int, int, u32, compat_uptr_t, u32);844 845/* obsolete */846#ifdef __ARCH_WANT_SYS_SIGPENDING847asmlinkage long compat_sys_sigpending(compat_old_sigset_t __user *set);848#endif849 850#ifdef __ARCH_WANT_SYS_SIGPROCMASK851asmlinkage long compat_sys_sigprocmask(int how, compat_old_sigset_t __user *nset,852 compat_old_sigset_t __user *oset);853#endif854#ifdef CONFIG_COMPAT_OLD_SIGACTION855asmlinkage long compat_sys_sigaction(int sig,856 const struct compat_old_sigaction __user *act,857 struct compat_old_sigaction __user *oact);858#endif859 860/* obsolete */861asmlinkage long compat_sys_socketcall(int call, u32 __user *args);862 863#ifdef __ARCH_WANT_COMPAT_TRUNCATE64864asmlinkage long compat_sys_truncate64(const char __user *pathname, compat_arg_u64(len));865#endif866 867#ifdef __ARCH_WANT_COMPAT_FTRUNCATE64868asmlinkage long compat_sys_ftruncate64(unsigned int fd, compat_arg_u64(len));869#endif870 871#ifdef __ARCH_WANT_COMPAT_FALLOCATE872asmlinkage long compat_sys_fallocate(int fd, int mode, compat_arg_u64(offset),873 compat_arg_u64(len));874#endif875 876#ifdef __ARCH_WANT_COMPAT_PREAD64877asmlinkage long compat_sys_pread64(unsigned int fd, char __user *buf, size_t count,878 compat_arg_u64(pos));879#endif880 881#ifdef __ARCH_WANT_COMPAT_PWRITE64882asmlinkage long compat_sys_pwrite64(unsigned int fd, const char __user *buf, size_t count,883 compat_arg_u64(pos));884#endif885 886#ifdef __ARCH_WANT_COMPAT_SYNC_FILE_RANGE887asmlinkage long compat_sys_sync_file_range(int fd, compat_arg_u64(pos),888 compat_arg_u64(nbytes), unsigned int flags);889#endif890 891#ifdef __ARCH_WANT_COMPAT_FADVISE64_64892asmlinkage long compat_sys_fadvise64_64(int fd, compat_arg_u64(pos),893 compat_arg_u64(len), int advice);894#endif895 896#ifdef __ARCH_WANT_COMPAT_READAHEAD897asmlinkage long compat_sys_readahead(int fd, compat_arg_u64(offset), size_t count);898#endif899 900#endif /* CONFIG_ARCH_HAS_SYSCALL_WRAPPER */901 902/**903 * ns_to_old_timeval32 - Compat version of ns_to_timeval904 * @nsec: the nanoseconds value to be converted905 *906 * Returns the old_timeval32 representation of the nsec parameter.907 */908static inline struct old_timeval32 ns_to_old_timeval32(s64 nsec)909{910 struct __kernel_old_timeval tv;911 struct old_timeval32 ctv;912 913 tv = ns_to_kernel_old_timeval(nsec);914 ctv.tv_sec = tv.tv_sec;915 ctv.tv_usec = tv.tv_usec;916 917 return ctv;918}919 920/*921 * Kernel code should not call compat syscalls (i.e., compat_sys_xyzyyz())922 * directly. Instead, use one of the functions which work equivalently, such923 * as the kcompat_sys_xyzyyz() functions prototyped below.924 */925 926int kcompat_sys_statfs64(const char __user * pathname, compat_size_t sz,927 struct compat_statfs64 __user * buf);928int kcompat_sys_fstatfs64(unsigned int fd, compat_size_t sz,929 struct compat_statfs64 __user * buf);930 931#ifdef CONFIG_COMPAT932 933/*934 * For most but not all architectures, "am I in a compat syscall?" and935 * "am I a compat task?" are the same question. For architectures on which936 * they aren't the same question, arch code can override in_compat_syscall.937 */938#ifndef in_compat_syscall939static inline bool in_compat_syscall(void) { return is_compat_task(); }940#endif941 942#else /* !CONFIG_COMPAT */943 944#define is_compat_task() (0)945/* Ensure no one redefines in_compat_syscall() under !CONFIG_COMPAT */946#define in_compat_syscall in_compat_syscall947static inline bool in_compat_syscall(void) { return false; }948 949#endif /* CONFIG_COMPAT */950 951#define BITS_PER_COMPAT_LONG (8*sizeof(compat_long_t))952 953#define BITS_TO_COMPAT_LONGS(bits) DIV_ROUND_UP(bits, BITS_PER_COMPAT_LONG)954 955long compat_get_bitmap(unsigned long *mask, const compat_ulong_t __user *umask,956 unsigned long bitmap_size);957long compat_put_bitmap(compat_ulong_t __user *umask, unsigned long *mask,958 unsigned long bitmap_size);959 960/*961 * Some legacy ABIs like the i386 one use less than natural alignment for 64-bit962 * types, and will need special compat treatment for that. Most architectures963 * don't need that special handling even for compat syscalls.964 */965#ifndef compat_need_64bit_alignment_fixup966#define compat_need_64bit_alignment_fixup() false967#endif968 969/*970 * A pointer passed in from user mode. This should not971 * be used for syscall parameters, just declare them972 * as pointers because the syscall entry code will have973 * appropriately converted them already.974 */975#ifndef compat_ptr976static inline void __user *compat_ptr(compat_uptr_t uptr)977{978 return (void __user *)(unsigned long)uptr;979}980#endif981 982static inline compat_uptr_t ptr_to_compat(void __user *uptr)983{984 return (u32)(unsigned long)uptr;985}986 987#endif /* _LINUX_COMPAT_H */988