arch/s390/kernel/compat_wrapper.c

   1 /*
   2  *  Compat system call wrappers.
   3  *
   4  *    Copyright IBM Corp. 2014
   5  */
   6
   7 #include <linux/syscalls.h>
   8 #include <linux/compat.h>
   9 #include "entry.h"
  10
  11 #define COMPAT_SYSCALL_WRAP1(name, ...) \
  12         COMPAT_SYSCALL_WRAPx(1, _##name, __VA_ARGS__)
  13 #define COMPAT_SYSCALL_WRAP2(name, ...) \
  14         COMPAT_SYSCALL_WRAPx(2, _##name, __VA_ARGS__)
  15 #define COMPAT_SYSCALL_WRAP3(name, ...) \
  16         COMPAT_SYSCALL_WRAPx(3, _##name, __VA_ARGS__)
  17 #define COMPAT_SYSCALL_WRAP4(name, ...) \
  18         COMPAT_SYSCALL_WRAPx(4, _##name, __VA_ARGS__)
  19 #define COMPAT_SYSCALL_WRAP5(name, ...) \
  20         COMPAT_SYSCALL_WRAPx(5, _##name, __VA_ARGS__)
  21 #define COMPAT_SYSCALL_WRAP6(name, ...) \
  22         COMPAT_SYSCALL_WRAPx(6, _##name, __VA_ARGS__)
  23
  24 #define __SC_COMPAT_TYPE(t, a) \
  25         __typeof(__builtin_choose_expr(sizeof(t) > 4, 0L, (t)0)) a
  26
  27 #define __SC_COMPAT_CAST(t, a)                                          \
  28 ({                                                                      \
  29         long __ReS = a;                                                 \
  30                                                                         \
  31         BUILD_BUG_ON((sizeof(t) > 4) && !__TYPE_IS_L(t) &&              \
  32                      !__TYPE_IS_UL(t) && !__TYPE_IS_PTR(t));            \
  33         if (__TYPE_IS_L(t))                                             \
  34                 __ReS = (s32)a;                                         \
  35         if (__TYPE_IS_UL(t))                                            \
  36                 __ReS = (u32)a;                                         \
  37         if (__TYPE_IS_PTR(t))                                           \
  38                 __ReS = a & 0x7fffffff;                                 \
  39         (t)__ReS;                                                       \
  40 })
  41
  42 /*
  43  * The COMPAT_SYSCALL_WRAP macro generates system call wrappers to be used by
  44  * compat tasks. These wrappers will only be used for system calls where only
  45  * the system call arguments need sign or zero extension or zeroing of the upper
  46  * 33 bits of pointers.
  47  * Note: since the wrapper function will afterwards call a system call which
  48  * again performs zero and sign extension for all system call arguments with
  49  * a size of less than eight bytes, these compat wrappers only touch those
  50  * system call arguments with a size of eight bytes ((unsigned) long and
  51  * pointers). Zero and sign extension for e.g. int parameters will be done by
  52  * the regular system call wrappers.
  53  */
  54 #define COMPAT_SYSCALL_WRAPx(x, name, ...)                                      \
  55         asmlinkage long sys##name(__MAP(x,__SC_DECL,__VA_ARGS__));              \
  56         asmlinkage long compat_sys##name(__MAP(x,__SC_COMPAT_TYPE,__VA_ARGS__));\
  57         asmlinkage long compat_sys##name(__MAP(x,__SC_COMPAT_TYPE,__VA_ARGS__)) \
  58         {                                                                       \
  59                 return sys##name(__MAP(x,__SC_COMPAT_CAST,__VA_ARGS__));        \
  60         }
  61
  62 COMPAT_SYSCALL_WRAP1(exit, int, error_code);
  63 COMPAT_SYSCALL_WRAP1(close, unsigned int, fd);
  64 COMPAT_SYSCALL_WRAP2(creat, const char __user *, pathname, umode_t, mode);
  65 COMPAT_SYSCALL_WRAP2(link, const char __user *, oldname, const char __user *, newname);
  66 COMPAT_SYSCALL_WRAP1(unlink, const char __user *, pathname);
  67 COMPAT_SYSCALL_WRAP1(chdir, const char __user *, filename);
  68 COMPAT_SYSCALL_WRAP3(mknod, const char __user *, filename, umode_t, mode, unsigned, dev);
  69 COMPAT_SYSCALL_WRAP2(chmod, const char __user *, filename, umode_t, mode);
  70 COMPAT_SYSCALL_WRAP1(oldumount, char __user *, name);
  71 COMPAT_SYSCALL_WRAP1(alarm, unsigned int, seconds);
  72 COMPAT_SYSCALL_WRAP2(access, const char __user *, filename, int, mode);
  73 COMPAT_SYSCALL_WRAP1(nice, int, increment);
  74 COMPAT_SYSCALL_WRAP2(kill, int, pid, int, sig);
  75 COMPAT_SYSCALL_WRAP2(rename, const char __user *, oldname, const char __user *, newname);
  76 COMPAT_SYSCALL_WRAP2(mkdir, const char __user *, pathname, umode_t, mode);
  77 COMPAT_SYSCALL_WRAP1(rmdir, const char __user *, pathname);
  78 COMPAT_SYSCALL_WRAP1(dup, unsigned int, fildes);
  79 COMPAT_SYSCALL_WRAP1(pipe, int __user *, fildes);
  80 COMPAT_SYSCALL_WRAP1(brk, unsigned long, brk);
  81 COMPAT_SYSCALL_WRAP2(signal, int, sig, __sighandler_t, handler);
  82 COMPAT_SYSCALL_WRAP1(acct, const char __user *, name);
  83 COMPAT_SYSCALL_WRAP2(umount, char __user *, name, int, flags);
  84 COMPAT_SYSCALL_WRAP2(setpgid, pid_t, pid, pid_t, pgid);
  85 COMPAT_SYSCALL_WRAP1(umask, int, mask);
  86 COMPAT_SYSCALL_WRAP1(chroot, const char __user *, filename);
  87 COMPAT_SYSCALL_WRAP2(dup2, unsigned int, oldfd, unsigned int, newfd);
  88 COMPAT_SYSCALL_WRAP3(sigsuspend, int, unused1, int, unused2, old_sigset_t, mask);
  89 COMPAT_SYSCALL_WRAP2(sethostname, char __user *, name, int, len);
  90 COMPAT_SYSCALL_WRAP2(symlink, const char __user *, old, const char __user *, new);
  91 COMPAT_SYSCALL_WRAP3(readlink, const char __user *, path, char __user *, buf, int, bufsiz);
  92 COMPAT_SYSCALL_WRAP1(uselib, const char __user *, library);
  93 COMPAT_SYSCALL_WRAP2(swapon, const char __user *, specialfile, int, swap_flags);
  94 COMPAT_SYSCALL_WRAP4(reboot, int, magic1, int, magic2, unsigned int, cmd, void __user *, arg);
  95 COMPAT_SYSCALL_WRAP2(munmap, unsigned long, addr, size_t, len);
  96 COMPAT_SYSCALL_WRAP2(fchmod, unsigned int, fd, umode_t, mode);
  97 COMPAT_SYSCALL_WRAP2(getpriority, int, which, int, who);
  98 COMPAT_SYSCALL_WRAP3(setpriority, int, which, int, who, int, niceval);
  99 COMPAT_SYSCALL_WRAP3(syslog, int, type, char __user *, buf, int, len);
 100 COMPAT_SYSCALL_WRAP1(swapoff, const char __user *, specialfile);
 101 COMPAT_SYSCALL_WRAP1(fsync, unsigned int, fd);
 102 COMPAT_SYSCALL_WRAP2(setdomainname, char __user *, name, int, len);
 103 COMPAT_SYSCALL_WRAP1(newuname, struct new_utsname __user *, name);
 104 COMPAT_SYSCALL_WRAP3(mprotect, unsigned long, start, size_t, len, unsigned long, prot);
 105 COMPAT_SYSCALL_WRAP3(init_module, void __user *, umod, unsigned long, len, const char __user *, uargs);
 106 COMPAT_SYSCALL_WRAP2(delete_module, const char __user *, name_user, unsigned int, flags);
 107 COMPAT_SYSCALL_WRAP4(quotactl, unsigned int, cmd, const char __user *, special, qid_t, id, void __user *, addr);
 108 COMPAT_SYSCALL_WRAP1(getpgid, pid_t, pid);
 109 COMPAT_SYSCALL_WRAP1(fchdir, unsigned int, fd);
 110 COMPAT_SYSCALL_WRAP2(bdflush, int, func, long, data);
 111 COMPAT_SYSCALL_WRAP3(sysfs, int, option, unsigned long, arg1, unsigned long, arg2);
 112 COMPAT_SYSCALL_WRAP1(s390_personality, unsigned int, personality);
 113 COMPAT_SYSCALL_WRAP5(llseek, unsigned int, fd, unsigned long, high, unsigned long, low, loff_t __user *, result, unsigned int, whence);
 114 COMPAT_SYSCALL_WRAP2(flock, unsigned int, fd, unsigned int, cmd);
 115 COMPAT_SYSCALL_WRAP3(msync, unsigned long, start, size_t, len, int, flags);
 116 COMPAT_SYSCALL_WRAP1(getsid, pid_t, pid);
 117 COMPAT_SYSCALL_WRAP1(fdatasync, unsigned int, fd);
 118 COMPAT_SYSCALL_WRAP2(mlock, unsigned long, start, size_t, len);
 119 COMPAT_SYSCALL_WRAP2(munlock, unsigned long, start, size_t, len);
 120 COMPAT_SYSCALL_WRAP1(mlockall, int, flags);
 121 COMPAT_SYSCALL_WRAP2(sched_setparam, pid_t, pid, struct sched_param __user *, param);
 122 COMPAT_SYSCALL_WRAP2(sched_getparam, pid_t, pid, struct sched_param __user *, param);
 123 COMPAT_SYSCALL_WRAP3(sched_setscheduler, pid_t, pid, int, policy, struct sched_param __user *, param);
 124 COMPAT_SYSCALL_WRAP1(sched_getscheduler, pid_t, pid);
 125 COMPAT_SYSCALL_WRAP1(sched_get_priority_max, int, policy);
 126 COMPAT_SYSCALL_WRAP1(sched_get_priority_min, int, policy);
 127 COMPAT_SYSCALL_WRAP5(mremap, unsigned long, addr, unsigned long, old_len, unsigned long, new_len, unsigned long, flags, unsigned long, new_addr);
 128 COMPAT_SYSCALL_WRAP3(poll, struct pollfd __user *, ufds, unsigned int, nfds, int, timeout);
 129 COMPAT_SYSCALL_WRAP5(prctl, int, option, unsigned long, arg2, unsigned long, arg3, unsigned long, arg4, unsigned long, arg5);
 130 COMPAT_SYSCALL_WRAP2(getcwd, char __user *, buf, unsigned long, size);
 131 COMPAT_SYSCALL_WRAP2(capget, cap_user_header_t, header, cap_user_data_t, dataptr);
 132 COMPAT_SYSCALL_WRAP2(capset, cap_user_header_t, header, const cap_user_data_t, data);
 133 COMPAT_SYSCALL_WRAP3(lchown, const char __user *, filename, uid_t, user, gid_t, group);
 134 COMPAT_SYSCALL_WRAP2(setreuid, uid_t, ruid, uid_t, euid);
 135 COMPAT_SYSCALL_WRAP2(setregid, gid_t, rgid, gid_t, egid);
 136 COMPAT_SYSCALL_WRAP2(getgroups, int, gidsetsize, gid_t __user *, grouplist);
 137 COMPAT_SYSCALL_WRAP2(setgroups, int, gidsetsize, gid_t __user *, grouplist);
 138 COMPAT_SYSCALL_WRAP3(fchown, unsigned int, fd, uid_t, user, gid_t, group);
 139 COMPAT_SYSCALL_WRAP3(setresuid, uid_t, ruid, uid_t, euid, uid_t, suid);
 140 COMPAT_SYSCALL_WRAP3(getresuid, uid_t __user *, ruid, uid_t __user *, euid, uid_t __user *, suid);
 141 COMPAT_SYSCALL_WRAP3(setresgid, gid_t, rgid, gid_t, egid, gid_t, sgid);
 142 COMPAT_SYSCALL_WRAP3(getresgid, gid_t __user *, rgid, gid_t __user *, egid, gid_t __user *, sgid);
 143 COMPAT_SYSCALL_WRAP3(chown, const char __user *, filename, uid_t, user, gid_t, group);
 144 COMPAT_SYSCALL_WRAP1(setuid, uid_t, uid);
 145 COMPAT_SYSCALL_WRAP1(setgid, gid_t, gid);
 146 COMPAT_SYSCALL_WRAP1(setfsuid, uid_t, uid);
 147 COMPAT_SYSCALL_WRAP1(setfsgid, gid_t, gid);
 148 COMPAT_SYSCALL_WRAP2(pivot_root, const char __user *, new_root, const char __user *, put_old);
 149 COMPAT_SYSCALL_WRAP3(mincore, unsigned long, start, size_t, len, unsigned char __user *, vec);
 150 COMPAT_SYSCALL_WRAP3(madvise, unsigned long, start, size_t, len, int, behavior);
 151 COMPAT_SYSCALL_WRAP5(setxattr, const char __user *, path, const char __user *, name, const void __user *, value, size_t, size, int, flags);
 152 COMPAT_SYSCALL_WRAP5(lsetxattr, const char __user *, path, const char __user *, name, const void __user *, value, size_t, size, int, flags);
 153 COMPAT_SYSCALL_WRAP5(fsetxattr, int, fd, const char __user *, name, const void __user *, value, size_t, size, int, flags);
 154 COMPAT_SYSCALL_WRAP3(getdents64, unsigned int, fd, struct linux_dirent64 __user *, dirent, unsigned int, count);
 155 COMPAT_SYSCALL_WRAP4(getxattr, const char __user *, path, const char __user *, name, void __user *, value, size_t, size);
 156 COMPAT_SYSCALL_WRAP4(lgetxattr, const char __user *, path, const char __user *, name, void __user *, value, size_t, size);
 157 COMPAT_SYSCALL_WRAP4(fgetxattr, int, fd, const char __user *, name, void __user *, value, size_t, size);
 158 COMPAT_SYSCALL_WRAP3(listxattr, const char __user *, path, char __user *, list, size_t, size);
 159 COMPAT_SYSCALL_WRAP3(llistxattr, const char __user *, path, char __user *, list, size_t, size);
 160 COMPAT_SYSCALL_WRAP3(flistxattr, int, fd, char __user *, list, size_t, size);
 161 COMPAT_SYSCALL_WRAP2(removexattr, const char __user *, path, const char __user *, name);
 162 COMPAT_SYSCALL_WRAP2(lremovexattr, const char __user *, path, const char __user *, name);
 163 COMPAT_SYSCALL_WRAP2(fremovexattr, int, fd, const char __user *, name);
 164 COMPAT_SYSCALL_WRAP1(exit_group, int, error_code);
 165 COMPAT_SYSCALL_WRAP1(set_tid_address, int __user *, tidptr);
 166 COMPAT_SYSCALL_WRAP1(epoll_create, int, size);
 167 COMPAT_SYSCALL_WRAP4(epoll_ctl, int, epfd, int, op, int, fd, struct epoll_event __user *, event);
 168 COMPAT_SYSCALL_WRAP4(epoll_wait, int, epfd, struct epoll_event __user *, events, int, maxevents, int, timeout);
 169 COMPAT_SYSCALL_WRAP1(timer_getoverrun, timer_t, timer_id);
 170 COMPAT_SYSCALL_WRAP1(timer_delete, compat_timer_t, compat_timer_id);
 171 COMPAT_SYSCALL_WRAP1(io_destroy, aio_context_t, ctx);
 172 COMPAT_SYSCALL_WRAP3(io_cancel, aio_context_t, ctx_id, struct iocb __user *, iocb, struct io_event __user *, result);
 173 COMPAT_SYSCALL_WRAP1(mq_unlink, const char __user *, name);
 174 COMPAT_SYSCALL_WRAP5(add_key, const char __user *, tp, const char __user *, dsc, const void __user *, pld, size_t, len, key_serial_t, id);
 175 COMPAT_SYSCALL_WRAP4(request_key, const char __user *, tp, const char __user *, dsc, const char __user *, info, key_serial_t, id);
 176 COMPAT_SYSCALL_WRAP5(remap_file_pages, unsigned long, start, unsigned long, size, unsigned long, prot, unsigned long, pgoff, unsigned long, flags);
 177 COMPAT_SYSCALL_WRAP3(ioprio_set, int, which, int, who, int, ioprio);
 178 COMPAT_SYSCALL_WRAP2(ioprio_get, int, which, int, who);
 179 COMPAT_SYSCALL_WRAP3(inotify_add_watch, int, fd, const char __user *, path, u32, mask);
 180 COMPAT_SYSCALL_WRAP2(inotify_rm_watch, int, fd, __s32, wd);
 181 COMPAT_SYSCALL_WRAP3(mkdirat, int, dfd, const char __user *, pathname, umode_t, mode);
 182 COMPAT_SYSCALL_WRAP4(mknodat, int, dfd, const char __user *, filename, umode_t, mode, unsigned, dev);
 183 COMPAT_SYSCALL_WRAP5(fchownat, int, dfd, const char __user *, filename, uid_t, user, gid_t, group, int, flag);
 184 COMPAT_SYSCALL_WRAP3(unlinkat, int, dfd, const char __user *, pathname, int, flag);
 185 COMPAT_SYSCALL_WRAP4(renameat, int, olddfd, const char __user *, oldname, int, newdfd, const char __user *, newname);
 186 COMPAT_SYSCALL_WRAP5(linkat, int, olddfd, const char __user *, oldname, int, newdfd, const char __user *, newname, int, flags);
 187 COMPAT_SYSCALL_WRAP3(symlinkat, const char __user *, oldname, int, newdfd, const char __user *, newname);
 188 COMPAT_SYSCALL_WRAP4(readlinkat, int, dfd, const char __user *, path, char __user *, buf, int, bufsiz);
 189 COMPAT_SYSCALL_WRAP3(fchmodat, int, dfd, const char __user *, filename, umode_t, mode);
 190 COMPAT_SYSCALL_WRAP3(faccessat, int, dfd, const char __user *, filename, int, mode);
 191 COMPAT_SYSCALL_WRAP1(unshare, unsigned long, unshare_flags);
 192 COMPAT_SYSCALL_WRAP6(splice, int, fd_in, loff_t __user *, off_in, int, fd_out, loff_t __user *, off_out, size_t, len, unsigned int, flags);
 193 COMPAT_SYSCALL_WRAP4(tee, int, fdin, int, fdout, size_t, len, unsigned int, flags);
 194 COMPAT_SYSCALL_WRAP3(getcpu, unsigned __user *, cpu, unsigned __user *, node, struct getcpu_cache __user *, cache);
 195 COMPAT_SYSCALL_WRAP1(eventfd, unsigned int, count);
 196 COMPAT_SYSCALL_WRAP2(timerfd_create, int, clockid, int, flags);
 197 COMPAT_SYSCALL_WRAP2(eventfd2, unsigned int, count, int, flags);
 198 COMPAT_SYSCALL_WRAP1(inotify_init1, int, flags);
 199 COMPAT_SYSCALL_WRAP2(pipe2, int __user *, fildes, int, flags);
 200 COMPAT_SYSCALL_WRAP3(dup3, unsigned int, oldfd, unsigned int, newfd, int, flags);
 201 COMPAT_SYSCALL_WRAP1(epoll_create1, int, flags);
 202 COMPAT_SYSCALL_WRAP2(tkill, int, pid, int, sig);
 203 COMPAT_SYSCALL_WRAP3(tgkill, int, tgid, int, pid, int, sig);
 204 COMPAT_SYSCALL_WRAP5(perf_event_open, struct perf_event_attr __user *, attr_uptr, pid_t, pid, int, cpu, int, group_fd, unsigned long, flags);
 205 COMPAT_SYSCALL_WRAP5(clone, unsigned long, newsp, unsigned long, clone_flags, int __user *, parent_tidptr, int __user *, child_tidptr, unsigned long, tls);
 206 COMPAT_SYSCALL_WRAP2(fanotify_init, unsigned int, flags, unsigned int, event_f_flags);
 207 COMPAT_SYSCALL_WRAP4(prlimit64, pid_t, pid, unsigned int, resource, const struct rlimit64 __user *, new_rlim, struct rlimit64 __user *, old_rlim);
 208 COMPAT_SYSCALL_WRAP5(name_to_handle_at, int, dfd, const char __user *, name, struct file_handle __user *, handle, int __user *, mnt_id, int, flag);
 209 COMPAT_SYSCALL_WRAP1(syncfs, int, fd);
 210 COMPAT_SYSCALL_WRAP2(setns, int, fd, int, nstype);
 211 COMPAT_SYSCALL_WRAP2(s390_runtime_instr, int, command, int, signum);
 212 COMPAT_SYSCALL_WRAP5(kcmp, pid_t, pid1, pid_t, pid2, int, type, unsigned long, idx1, unsigned long, idx2);
 213 COMPAT_SYSCALL_WRAP3(finit_module, int, fd, const char __user *, uargs, int, flags);
 214 COMPAT_SYSCALL_WRAP3(sched_setattr, pid_t, pid, struct sched_attr __user *, attr, unsigned int, flags);
 215 COMPAT_SYSCALL_WRAP4(sched_getattr, pid_t, pid, struct sched_attr __user *, attr, unsigned int, size, unsigned int, flags);
 216 COMPAT_SYSCALL_WRAP5(renameat2, int, olddfd, const char __user *, oldname, int, newdfd, const char __user *, newname, unsigned int, flags);
 217 COMPAT_SYSCALL_WRAP3(seccomp, unsigned int, op, unsigned int, flags, const char __user *, uargs)
 218 COMPAT_SYSCALL_WRAP3(getrandom, char __user *, buf, size_t, count, unsigned int, flags)
 219 COMPAT_SYSCALL_WRAP2(memfd_create, const char __user *, uname, unsigned int, flags)
 220 COMPAT_SYSCALL_WRAP3(bpf, int, cmd, union bpf_attr *, attr, unsigned int, size);
 221 COMPAT_SYSCALL_WRAP3(s390_pci_mmio_write, const unsigned long, mmio_addr, const void __user *, user_buffer, const size_t, length);
 222 COMPAT_SYSCALL_WRAP3(s390_pci_mmio_read, const unsigned long, mmio_addr, void __user *, user_buffer, const size_t, length);