arch/sparc/kernel/sys_sparc32.c

   1 /* sys_sparc32.c: Conversion between 32bit and 64bit native syscalls.
   2  *
   3  * Copyright (C) 1997,1998 Jakub Jelinek (jj@sunsite.mff.cuni.cz)
   4  * Copyright (C) 1997, 2007 David S. Miller (davem@davemloft.net)
   5  *
   6  * These routines maintain argument size conversion between 32bit and 64bit
   7  * environment.
   8  */
   9
  10 #include <linux/kernel.h>
  11 #include <linux/sched.h>
  12 #include <linux/capability.h>
  13 #include <linux/fs.h>
  14 #include <linux/mm.h>
  15 #include <linux/file.h>
  16 #include <linux/signal.h>
  17 #include <linux/resource.h>
  18 #include <linux/times.h>
  19 #include <linux/smp.h>
  20 #include <linux/sem.h>
  21 #include <linux/msg.h>
  22 #include <linux/shm.h>
  23 #include <linux/uio.h>
  24 #include <linux/nfs_fs.h>
  25 #include <linux/quota.h>
  26 #include <linux/poll.h>
  27 #include <linux/personality.h>
  28 #include <linux/stat.h>
  29 #include <linux/filter.h>
  30 #include <linux/highmem.h>
  31 #include <linux/highuid.h>
  32 #include <linux/mman.h>
  33 #include <linux/ipv6.h>
  34 #include <linux/in.h>
  35 #include <linux/icmpv6.h>
  36 #include <linux/syscalls.h>
  37 #include <linux/sysctl.h>
  38 #include <linux/binfmts.h>
  39 #include <linux/dnotify.h>
  40 #include <linux/security.h>
  41 #include <linux/compat.h>
  42 #include <linux/vfs.h>
  43 #include <linux/ptrace.h>
  44 #include <linux/slab.h>
  45
  46 #include <asm/types.h>
  47 #include <asm/uaccess.h>
  48 #include <asm/fpumacro.h>
  49 #include <asm/mmu_context.h>
  50 #include <asm/compat_signal.h>
  51
  52 asmlinkage long sys32_truncate64(const char __user * path, unsigned long high, unsigned long low)
  53 {
  54         if ((int)high < 0)
  55                 return -EINVAL;
  56         else
  57                 return sys_truncate(path, (high << 32) | low);
  58 }
  59
  60 asmlinkage long sys32_ftruncate64(unsigned int fd, unsigned long high, unsigned long low)
  61 {
  62         if ((int)high < 0)
  63                 return -EINVAL;
  64         else
  65                 return sys_ftruncate(fd, (high << 32) | low);
  66 }
  67
  68 static int cp_compat_stat64(struct kstat *stat,
  69                             struct compat_stat64 __user *statbuf)
  70 {
  71         int err;
  72
  73         err  = put_user(huge_encode_dev(stat->dev), &statbuf->st_dev);
  74         err |= put_user(stat->ino, &statbuf->st_ino);
  75         err |= put_user(stat->mode, &statbuf->st_mode);
  76         err |= put_user(stat->nlink, &statbuf->st_nlink);
  77         err |= put_user(from_kuid_munged(current_user_ns(), stat->uid), &statbuf->st_uid);
  78         err |= put_user(from_kgid_munged(current_user_ns(), stat->gid), &statbuf->st_gid);
  79         err |= put_user(huge_encode_dev(stat->rdev), &statbuf->st_rdev);
  80         err |= put_user(0, (unsigned long __user *) &statbuf->__pad3[0]);
  81         err |= put_user(stat->size, &statbuf->st_size);
  82         err |= put_user(stat->blksize, &statbuf->st_blksize);
  83         err |= put_user(0, (unsigned int __user *) &statbuf->__pad4[0]);
  84         err |= put_user(0, (unsigned int __user *) &statbuf->__pad4[4]);
  85         err |= put_user(stat->blocks, &statbuf->st_blocks);
  86         err |= put_user(stat->atime.tv_sec, &statbuf->st_atime);
  87         err |= put_user(stat->atime.tv_nsec, &statbuf->st_atime_nsec);
  88         err |= put_user(stat->mtime.tv_sec, &statbuf->st_mtime);
  89         err |= put_user(stat->mtime.tv_nsec, &statbuf->st_mtime_nsec);
  90         err |= put_user(stat->ctime.tv_sec, &statbuf->st_ctime);
  91         err |= put_user(stat->ctime.tv_nsec, &statbuf->st_ctime_nsec);
  92         err |= put_user(0, &statbuf->__unused4);
  93         err |= put_user(0, &statbuf->__unused5);
  94
  95         return err;
  96 }
  97
  98 asmlinkage long compat_sys_stat64(const char __user * filename,
  99                 struct compat_stat64 __user *statbuf)
 100 {
 101         struct kstat stat;
 102         int error = vfs_stat(filename, &stat);
 103
 104         if (!error)
 105                 error = cp_compat_stat64(&stat, statbuf);
 106         return error;
 107 }
 108
 109 asmlinkage long compat_sys_lstat64(const char __user * filename,
 110                 struct compat_stat64 __user *statbuf)
 111 {
 112         struct kstat stat;
 113         int error = vfs_lstat(filename, &stat);
 114
 115         if (!error)
 116                 error = cp_compat_stat64(&stat, statbuf);
 117         return error;
 118 }
 119
 120 asmlinkage long compat_sys_fstat64(unsigned int fd,
 121                 struct compat_stat64 __user * statbuf)
 122 {
 123         struct kstat stat;
 124         int error = vfs_fstat(fd, &stat);
 125
 126         if (!error)
 127                 error = cp_compat_stat64(&stat, statbuf);
 128         return error;
 129 }
 130
 131 asmlinkage long compat_sys_fstatat64(unsigned int dfd,
 132                 const char __user *filename,
 133                 struct compat_stat64 __user * statbuf, int flag)
 134 {
 135         struct kstat stat;
 136         int error;
 137
 138         error = vfs_fstatat(dfd, filename, &stat, flag);
 139         if (error)
 140                 return error;
 141         return cp_compat_stat64(&stat, statbuf);
 142 }
 143
 144 COMPAT_SYSCALL_DEFINE3(sparc_sigaction, int, sig,
 145                         struct compat_old_sigaction __user *,act,
 146                         struct compat_old_sigaction __user *,oact)
 147 {
 148         WARN_ON_ONCE(sig >= 0);
 149         return compat_sys_sigaction(-sig, act, oact);
 150 }
 151
 152 COMPAT_SYSCALL_DEFINE5(rt_sigaction, int, sig,
 153                         struct compat_sigaction __user *,act,
 154                         struct compat_sigaction __user *,oact,
 155                         void __user *,restorer,
 156                         compat_size_t,sigsetsize)
 157 {
 158         struct k_sigaction new_ka, old_ka;
 159         int ret;
 160         compat_sigset_t set32;
 161
 162         /* XXX: Don't preclude handling different sized sigset_t's.  */
 163         if (sigsetsize != sizeof(compat_sigset_t))
 164                 return -EINVAL;
 165
 166         if (act) {
 167                 u32 u_handler, u_restorer;
 168
 169                 new_ka.ka_restorer = restorer;
 170                 ret = get_user(u_handler, &act->sa_handler);
 171                 new_ka.sa.sa_handler =  compat_ptr(u_handler);
 172                 ret |= copy_from_user(&set32, &act->sa_mask, sizeof(compat_sigset_t));
 173                 sigset_from_compat(&new_ka.sa.sa_mask, &set32);
 174                 ret |= get_user(new_ka.sa.sa_flags, &act->sa_flags);
 175                 ret |= get_user(u_restorer, &act->sa_restorer);
 176                 new_ka.sa.sa_restorer = compat_ptr(u_restorer);
 177                 if (ret)
 178                         return -EFAULT;
 179         }
 180
 181         ret = do_sigaction(sig, act ? &new_ka : NULL, oact ? &old_ka : NULL);
 182
 183         if (!ret && oact) {
 184                 sigset_to_compat(&set32, &old_ka.sa.sa_mask);
 185                 ret = put_user(ptr_to_compat(old_ka.sa.sa_handler), &oact->sa_handler);
 186                 ret |= copy_to_user(&oact->sa_mask, &set32, sizeof(compat_sigset_t));
 187                 ret |= put_user(old_ka.sa.sa_flags, &oact->sa_flags);
 188                 ret |= put_user(ptr_to_compat(old_ka.sa.sa_restorer), &oact->sa_restorer);
 189                 if (ret)
 190                         ret = -EFAULT;
 191         }
 192
 193         return ret;
 194 }
 195
 196 asmlinkage compat_ssize_t sys32_pread64(unsigned int fd,
 197                                         char __user *ubuf,
 198                                         compat_size_t count,
 199                                         unsigned long poshi,
 200                                         unsigned long poslo)
 201 {
 202         return sys_pread64(fd, ubuf, count, (poshi << 32) | poslo);
 203 }
 204
 205 asmlinkage compat_ssize_t sys32_pwrite64(unsigned int fd,
 206                                          char __user *ubuf,
 207                                          compat_size_t count,
 208                                          unsigned long poshi,
 209                                          unsigned long poslo)
 210 {
 211         return sys_pwrite64(fd, ubuf, count, (poshi << 32) | poslo);
 212 }
 213
 214 asmlinkage long compat_sys_readahead(int fd,
 215                                      unsigned long offhi,
 216                                      unsigned long offlo,
 217                                      compat_size_t count)
 218 {
 219         return sys_readahead(fd, (offhi << 32) | offlo, count);
 220 }
 221
 222 long compat_sys_fadvise64(int fd,
 223                           unsigned long offhi,
 224                           unsigned long offlo,
 225                           compat_size_t len, int advice)
 226 {
 227         return sys_fadvise64_64(fd, (offhi << 32) | offlo, len, advice);
 228 }
 229
 230 long compat_sys_fadvise64_64(int fd,
 231                              unsigned long offhi, unsigned long offlo,
 232                              unsigned long lenhi, unsigned long lenlo,
 233                              int advice)
 234 {
 235         return sys_fadvise64_64(fd,
 236                                 (offhi << 32) | offlo,
 237                                 (lenhi << 32) | lenlo,
 238                                 advice);
 239 }
 240
 241 long sys32_sync_file_range(unsigned int fd, unsigned long off_high, unsigned long off_low, unsigned long nb_high, unsigned long nb_low, unsigned int flags)
 242 {
 243         return sys_sync_file_range(fd,
 244                                    (off_high << 32) | off_low,
 245                                    (nb_high << 32) | nb_low,
 246                                    flags);
 247 }
 248
 249 asmlinkage long compat_sys_fallocate(int fd, int mode, u32 offhi, u32 offlo,
 250                                      u32 lenhi, u32 lenlo)
 251 {
 252         return sys_fallocate(fd, mode, ((loff_t)offhi << 32) | offlo,
 253                              ((loff_t)lenhi << 32) | lenlo);
 254 }