arch/parisc/kernel/sys_parisc32.c

   1 /*
   2  * sys_parisc32.c: Conversion between 32bit and 64bit native syscalls.
   3  *
   4  * Copyright (C) 2000-2001 Hewlett Packard Company
   5  * Copyright (C) 2000 John Marvin
   6  * Copyright (C) 2001 Matthew Wilcox
   7  *
   8  * These routines maintain argument size conversion between 32bit and 64bit
   9  * environment. Based heavily on sys_ia32.c and sys_sparc32.c.
  10  */
  11
  12 #include <linux/compat.h>
  13 #include <linux/kernel.h>
  14 #include <linux/sched.h>
  15 #include <linux/fs.h>
  16 #include <linux/mm.h>
  17 #include <linux/file.h>
  18 #include <linux/signal.h>
  19 #include <linux/resource.h>
  20 #include <linux/times.h>
  21 #include <linux/time.h>
  22 #include <linux/smp.h>
  23 #include <linux/sem.h>
  24 #include <linux/msg.h>
  25 #include <linux/shm.h>
  26 #include <linux/slab.h>
  27 #include <linux/uio.h>
  28 #include <linux/ncp_fs.h>
  29 #include <linux/poll.h>
  30 #include <linux/personality.h>
  31 #include <linux/stat.h>
  32 #include <linux/highmem.h>
  33 #include <linux/highuid.h>
  34 #include <linux/mman.h>
  35 #include <linux/binfmts.h>
  36 #include <linux/namei.h>
  37 #include <linux/vfs.h>
  38 #include <linux/ptrace.h>
  39 #include <linux/swap.h>
  40 #include <linux/syscalls.h>
  41
  42 #include <asm/types.h>
  43 #include <asm/uaccess.h>
  44 #include <asm/mmu_context.h>
  45
  46 #include "sys32.h"
  47
  48 #undef DEBUG
  49
  50 #ifdef DEBUG
  51 #define DBG(x)  printk x
  52 #else
  53 #define DBG(x)
  54 #endif
  55
  56 asmlinkage long sys32_unimplemented(int r26, int r25, int r24, int r23,
  57         int r22, int r21, int r20)
  58 {
  59     printk(KERN_ERR "%s(%d): Unimplemented 32 on 64 syscall #%d!\n",
  60         current->comm, current->pid, r20);
  61     return -ENOSYS;
  62 }
  63
  64 asmlinkage long sys32_sched_rr_get_interval(pid_t pid,
  65         struct compat_timespec __user *interval)
  66 {
  67         struct timespec t;
  68         int ret;
  69
  70         KERNEL_SYSCALL(ret, sys_sched_rr_get_interval, pid, (struct timespec __user *)&t);
  71         if (put_compat_timespec(&t, interval))
  72                 return -EFAULT;
  73         return ret;
  74 }
  75
  76 struct msgbuf32 {
  77     int mtype;
  78     char mtext[1];
  79 };
  80
  81 asmlinkage long sys32_msgsnd(int msqid,
  82                                 struct msgbuf32 __user *umsgp32,
  83                                 size_t msgsz, int msgflg)
  84 {
  85         struct msgbuf *mb;
  86         struct msgbuf32 mb32;
  87         int err;
  88
  89         if ((mb = kmalloc(msgsz + sizeof *mb + 4, GFP_KERNEL)) == NULL)
  90                 return -ENOMEM;
  91
  92         err = get_user(mb32.mtype, &umsgp32->mtype);
  93         mb->mtype = mb32.mtype;
  94         err |= copy_from_user(mb->mtext, &umsgp32->mtext, msgsz);
  95
  96         if (err)
  97                 err = -EFAULT;
  98         else
  99                 KERNEL_SYSCALL(err, sys_msgsnd, msqid, (struct msgbuf __user *)mb, msgsz, msgflg);
 100
 101         kfree(mb);
 102         return err;
 103 }
 104
 105 asmlinkage long sys32_msgrcv(int msqid,
 106                                 struct msgbuf32 __user *umsgp32,
 107                                 size_t msgsz, long msgtyp, int msgflg)
 108 {
 109         struct msgbuf *mb;
 110         struct msgbuf32 mb32;
 111         int err, len;
 112
 113         if ((mb = kmalloc(msgsz + sizeof *mb + 4, GFP_KERNEL)) == NULL)
 114                 return -ENOMEM;
 115
 116         KERNEL_SYSCALL(err, sys_msgrcv, msqid, (struct msgbuf __user *)mb, msgsz, msgtyp, msgflg);
 117
 118         if (err >= 0) {
 119                 len = err;
 120                 mb32.mtype = mb->mtype;
 121                 err = put_user(mb32.mtype, &umsgp32->mtype);
 122                 err |= copy_to_user(&umsgp32->mtext, mb->mtext, len);
 123                 if (err)
 124                         err = -EFAULT;
 125                 else
 126                         err = len;
 127         }
 128
 129         kfree(mb);
 130         return err;
 131 }
 132
 133 asmlinkage int sys32_sendfile(int out_fd, int in_fd, compat_off_t __user *offset, s32 count)
 134 {
 135         mm_segment_t old_fs = get_fs();
 136         int ret;
 137         off_t of;
 138
 139         if (offset && get_user(of, offset))
 140                 return -EFAULT;
 141
 142         set_fs(KERNEL_DS);
 143         ret = sys_sendfile(out_fd, in_fd, offset ? (off_t __user *)&of : NULL, count);
 144         set_fs(old_fs);
 145
 146         if (offset && put_user(of, offset))
 147                 return -EFAULT;
 148
 149         return ret;
 150 }
 151
 152 asmlinkage int sys32_sendfile64(int out_fd, int in_fd, compat_loff_t __user *offset, s32 count)
 153 {
 154         mm_segment_t old_fs = get_fs();
 155         int ret;
 156         loff_t lof;
 157
 158         if (offset && get_user(lof, offset))
 159                 return -EFAULT;
 160
 161         set_fs(KERNEL_DS);
 162         ret = sys_sendfile64(out_fd, in_fd, offset ? (loff_t __user *)&lof : NULL, count);
 163         set_fs(old_fs);
 164
 165         if (offset && put_user(lof, offset))
 166                 return -EFAULT;
 167
 168         return ret;
 169 }
 170
 171
 172 /* lseek() needs a wrapper because 'offset' can be negative, but the top
 173  * half of the argument has been zeroed by syscall.S.
 174  */
 175
 176 asmlinkage int sys32_lseek(unsigned int fd, int offset, unsigned int origin)
 177 {
 178         return sys_lseek(fd, offset, origin);
 179 }
 180
 181 asmlinkage long sys32_semctl(int semid, int semnum, int cmd, union semun arg)
 182 {
 183         union semun u;
 184
 185         if (cmd == SETVAL) {
 186                 /* Ugh.  arg is a union of int,ptr,ptr,ptr, so is 8 bytes.
 187                  * The int should be in the first 4, but our argument
 188                  * frobbing has left it in the last 4.
 189                  */
 190                 u.val = *((int *)&arg + 1);
 191                 return sys_semctl (semid, semnum, cmd, u);
 192         }
 193         return sys_semctl (semid, semnum, cmd, arg);
 194 }
 195
 196 long sys32_lookup_dcookie(u32 cookie_high, u32 cookie_low, char __user *buf,
 197                           size_t len)
 198 {
 199         return sys_lookup_dcookie((u64)cookie_high << 32 | cookie_low,
 200                                   buf, len);
 201 }
 202
 203 asmlinkage long compat_sys_fallocate(int fd, int mode, u32 offhi, u32 offlo,
 204                                 u32 lenhi, u32 lenlo)
 205 {
 206         return sys_fallocate(fd, mode, ((loff_t)offhi << 32) | offlo,
 207                              ((loff_t)lenhi << 32) | lenlo);
 208 }
 209
 210 asmlinkage long compat_sys_fanotify_mark(int fan_fd, int flags, u32 mask_hi,
 211                                          u32 mask_lo, int fd,
 212                                          const char __user *pathname)
 213 {
 214         return sys_fanotify_mark(fan_fd, flags, ((u64)mask_hi << 32) | mask_lo,
 215                                  fd, pathname);
 216 }