arch/sparc/kernel/sys_sparc32.c

   1 // SPDX-License-Identifier: GPL-2.0
   2 /* sys_sparc32.c: Conversion between 32bit and 64bit native syscalls.
   3  *
   4  * Copyright (C) 1997,1998 Jakub Jelinek (jj@sunsite.mff.cuni.cz)
   5  * Copyright (C) 1997, 2007 David S. Miller (davem@davemloft.net)
   6  *
   7  * These routines maintain argument size conversion between 32bit and 64bit
   8  * environment.
   9  */
  10
  11 #include <linux/kernel.h>
  12 #include <linux/sched.h>
  13 #include <linux/capability.h>
  14 #include <linux/fs.h>
  15 #include <linux/mm.h>
  16 #include <linux/file.h>
  17 #include <linux/signal.h>
  18 #include <linux/resource.h>
  19 #include <linux/times.h>
  20 #include <linux/smp.h>
  21 #include <linux/sem.h>
  22 #include <linux/msg.h>
  23 #include <linux/shm.h>
  24 #include <linux/uio.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 <linux/uaccess.h>
  48 #include <asm/fpumacro.h>
  49 #include <asm/mmu_context.h>
  50 #include <asm/compat_signal.h>
  51
  52 #include "systbls.h"
  53
  54 COMPAT_SYSCALL_DEFINE3(truncate64, const char __user *, path, u32, high, u32, low)
  55 {
  56         return ksys_truncate(path, ((u64)high << 32) | low);
  57 }
  58
  59 COMPAT_SYSCALL_DEFINE3(ftruncate64, unsigned int, fd, u32, high, u32, low)
  60 {
  61         return ksys_ftruncate(fd, ((u64)high << 32) | low);
  62 }
  63
  64 static int cp_compat_stat64(struct kstat *stat,
  65                             struct compat_stat64 __user *statbuf)
  66 {
  67         int err;
  68
  69         err  = put_user(huge_encode_dev(stat->dev), &statbuf->st_dev);
  70         err |= put_user(stat->ino, &statbuf->st_ino);
  71         err |= put_user(stat->mode, &statbuf->st_mode);
  72         err |= put_user(stat->nlink, &statbuf->st_nlink);
  73         err |= put_user(from_kuid_munged(current_user_ns(), stat->uid), &statbuf->st_uid);
  74         err |= put_user(from_kgid_munged(current_user_ns(), stat->gid), &statbuf->st_gid);
  75         err |= put_user(huge_encode_dev(stat->rdev), &statbuf->st_rdev);
  76         err |= put_user(0, (unsigned long __user *) &statbuf->__pad3[0]);
  77         err |= put_user(stat->size, &statbuf->st_size);
  78         err |= put_user(stat->blksize, &statbuf->st_blksize);
  79         err |= put_user(0, (unsigned int __user *) &statbuf->__pad4[0]);
  80         err |= put_user(0, (unsigned int __user *) &statbuf->__pad4[4]);
  81         err |= put_user(stat->blocks, &statbuf->st_blocks);
  82         err |= put_user(stat->atime.tv_sec, &statbuf->st_atime);
  83         err |= put_user(stat->atime.tv_nsec, &statbuf->st_atime_nsec);
  84         err |= put_user(stat->mtime.tv_sec, &statbuf->st_mtime);
  85         err |= put_user(stat->mtime.tv_nsec, &statbuf->st_mtime_nsec);
  86         err |= put_user(stat->ctime.tv_sec, &statbuf->st_ctime);
  87         err |= put_user(stat->ctime.tv_nsec, &statbuf->st_ctime_nsec);
  88         err |= put_user(0, &statbuf->__unused4);
  89         err |= put_user(0, &statbuf->__unused5);
  90
  91         return err;
  92 }
  93
  94 COMPAT_SYSCALL_DEFINE2(stat64, const char __user *, filename,
  95                 struct compat_stat64 __user *, statbuf)
  96 {
  97         struct kstat stat;
  98         int error = vfs_stat(filename, &stat);
  99
 100         if (!error)
 101                 error = cp_compat_stat64(&stat, statbuf);
 102         return error;
 103 }
 104
 105 COMPAT_SYSCALL_DEFINE2(lstat64, const char __user *, filename,
 106                 struct compat_stat64 __user *, statbuf)
 107 {
 108         struct kstat stat;
 109         int error = vfs_lstat(filename, &stat);
 110
 111         if (!error)
 112                 error = cp_compat_stat64(&stat, statbuf);
 113         return error;
 114 }
 115
 116 COMPAT_SYSCALL_DEFINE2(fstat64, unsigned int, fd,
 117                 struct compat_stat64 __user *, statbuf)
 118 {
 119         struct kstat stat;
 120         int error = vfs_fstat(fd, &stat);
 121
 122         if (!error)
 123                 error = cp_compat_stat64(&stat, statbuf);
 124         return error;
 125 }
 126
 127 COMPAT_SYSCALL_DEFINE4(fstatat64, unsigned int, dfd,
 128                 const char __user *, filename,
 129                 struct compat_stat64 __user *, statbuf, int, flag)
 130 {
 131         struct kstat stat;
 132         int error;
 133
 134         error = vfs_fstatat(dfd, filename, &stat, flag);
 135         if (error)
 136                 return error;
 137         return cp_compat_stat64(&stat, statbuf);
 138 }
 139
 140 COMPAT_SYSCALL_DEFINE3(sparc_sigaction, int, sig,
 141                         struct compat_old_sigaction __user *,act,
 142                         struct compat_old_sigaction __user *,oact)
 143 {
 144         WARN_ON_ONCE(sig >= 0);
 145         return compat_sys_sigaction(-sig, act, oact);
 146 }
 147
 148 COMPAT_SYSCALL_DEFINE5(rt_sigaction, int, sig,
 149                         struct compat_sigaction __user *,act,
 150                         struct compat_sigaction __user *,oact,
 151                         void __user *,restorer,
 152                         compat_size_t,sigsetsize)
 153 {
 154         struct k_sigaction new_ka, old_ka;
 155         int ret;
 156
 157         /* XXX: Don't preclude handling different sized sigset_t's.  */
 158         if (sigsetsize != sizeof(compat_sigset_t))
 159                 return -EINVAL;
 160
 161         if (act) {
 162                 u32 u_handler, u_restorer;
 163
 164                 new_ka.ka_restorer = restorer;
 165                 ret = get_user(u_handler, &act->sa_handler);
 166                 new_ka.sa.sa_handler =  compat_ptr(u_handler);
 167                 ret |= get_compat_sigset(&new_ka.sa.sa_mask, &act->sa_mask);
 168                 ret |= get_user(new_ka.sa.sa_flags, &act->sa_flags);
 169                 ret |= get_user(u_restorer, &act->sa_restorer);
 170                 new_ka.sa.sa_restorer = compat_ptr(u_restorer);
 171                 if (ret)
 172                         return -EFAULT;
 173         }
 174
 175         ret = do_sigaction(sig, act ? &new_ka : NULL, oact ? &old_ka : NULL);
 176
 177         if (!ret && oact) {
 178                 ret = put_user(ptr_to_compat(old_ka.sa.sa_handler), &oact->sa_handler);
 179                 ret |= put_compat_sigset(&oact->sa_mask, &old_ka.sa.sa_mask,
 180                                          sizeof(oact->sa_mask));
 181                 ret |= put_user(old_ka.sa.sa_flags, &oact->sa_flags);
 182                 ret |= put_user(ptr_to_compat(old_ka.sa.sa_restorer), &oact->sa_restorer);
 183                 if (ret)
 184                         ret = -EFAULT;
 185         }
 186
 187         return ret;
 188 }
 189
 190 COMPAT_SYSCALL_DEFINE5(pread64, unsigned int, fd, char __user *, ubuf,
 191                         compat_size_t, count, u32, poshi, u32, poslo)
 192 {
 193         return ksys_pread64(fd, ubuf, count, ((u64)poshi << 32) | poslo);
 194 }
 195
 196 COMPAT_SYSCALL_DEFINE5(pwrite64, unsigned int, fd, char __user *, ubuf,
 197                         compat_size_t, count, u32, poshi, u32, poslo)
 198 {
 199         return ksys_pwrite64(fd, ubuf, count, ((u64)poshi << 32) | poslo);
 200 }
 201
 202 COMPAT_SYSCALL_DEFINE4(readahead, int, fd, u32, offhi, u32, offlo,
 203                      compat_size_t, count)
 204 {
 205         return ksys_readahead(fd, ((u64)offhi << 32) | offlo, count);
 206 }
 207
 208 COMPAT_SYSCALL_DEFINE5(fadvise64, int, fd, u32, offhi, u32, offlo,
 209                           compat_size_t, len, int, advice)
 210 {
 211         return ksys_fadvise64_64(fd, ((u64)offhi << 32) | offlo, len, advice);
 212 }
 213
 214 COMPAT_SYSCALL_DEFINE6(fadvise64_64, int, fd, u32, offhi, u32, offlo,
 215                              u32, lenhi, u32, lenlo, int, advice)
 216 {
 217         return ksys_fadvise64_64(fd,
 218                                  ((u64)offhi << 32) | offlo,
 219                                  ((u64)lenhi << 32) | lenlo,
 220                                  advice);
 221 }
 222
 223 COMPAT_SYSCALL_DEFINE6(sync_file_range, unsigned int, fd, u32, off_high, u32, off_low,
 224                         u32, nb_high, u32, nb_low, unsigned int, flags)
 225 {
 226         return ksys_sync_file_range(fd,
 227                                     ((u64)off_high << 32) | off_low,
 228                                     ((u64)nb_high << 32) | nb_low,
 229                                     flags);
 230 }
 231
 232 COMPAT_SYSCALL_DEFINE6(fallocate, int, fd, int, mode, u32, offhi, u32, offlo,
 233                                      u32, lenhi, u32, lenlo)
 234 {
 235         return ksys_fallocate(fd, mode, ((loff_t)offhi << 32) | offlo,
 236                               ((loff_t)lenhi << 32) | lenlo);
 237 }