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Linux/arch/parisc/kernel/sys_parisc32.c

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  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 /*
 57  * sys32_execve() executes a new program.
 58  */
 59 
 60 asmlinkage int sys32_execve(struct pt_regs *regs)
 61 {
 62         int error;
 63         struct filename *filename;
 64 
 65         DBG(("sys32_execve(%p) r26 = 0x%lx\n", regs, regs->gr[26]));
 66         filename = getname((const char __user *) regs->gr[26]);
 67         error = PTR_ERR(filename);
 68         if (IS_ERR(filename))
 69                 goto out;
 70         error = compat_do_execve(filename->name, compat_ptr(regs->gr[25]),
 71                                  compat_ptr(regs->gr[24]), regs);
 72         putname(filename);
 73 out:
 74 
 75         return error;
 76 }
 77 
 78 asmlinkage long sys32_unimplemented(int r26, int r25, int r24, int r23,
 79         int r22, int r21, int r20)
 80 {
 81     printk(KERN_ERR "%s(%d): Unimplemented 32 on 64 syscall #%d!\n", 
 82         current->comm, current->pid, r20);
 83     return -ENOSYS;
 84 }
 85 
 86 asmlinkage long sys32_sched_rr_get_interval(pid_t pid,
 87         struct compat_timespec __user *interval)
 88 {
 89         struct timespec t;
 90         int ret;
 91 
 92         KERNEL_SYSCALL(ret, sys_sched_rr_get_interval, pid, (struct timespec __user *)&t);
 93         if (put_compat_timespec(&t, interval))
 94                 return -EFAULT;
 95         return ret;
 96 }
 97 
 98 struct msgbuf32 {
 99     int mtype;
100     char mtext[1];
101 };
102 
103 asmlinkage long sys32_msgsnd(int msqid,
104                                 struct msgbuf32 __user *umsgp32,
105                                 size_t msgsz, int msgflg)
106 {
107         struct msgbuf *mb;
108         struct msgbuf32 mb32;
109         int err;
110 
111         if ((mb = kmalloc(msgsz + sizeof *mb + 4, GFP_KERNEL)) == NULL)
112                 return -ENOMEM;
113 
114         err = get_user(mb32.mtype, &umsgp32->mtype);
115         mb->mtype = mb32.mtype;
116         err |= copy_from_user(mb->mtext, &umsgp32->mtext, msgsz);
117 
118         if (err)
119                 err = -EFAULT;
120         else
121                 KERNEL_SYSCALL(err, sys_msgsnd, msqid, (struct msgbuf __user *)mb, msgsz, msgflg);
122 
123         kfree(mb);
124         return err;
125 }
126 
127 asmlinkage long sys32_msgrcv(int msqid,
128                                 struct msgbuf32 __user *umsgp32,
129                                 size_t msgsz, long msgtyp, int msgflg)
130 {
131         struct msgbuf *mb;
132         struct msgbuf32 mb32;
133         int err, len;
134 
135         if ((mb = kmalloc(msgsz + sizeof *mb + 4, GFP_KERNEL)) == NULL)
136                 return -ENOMEM;
137 
138         KERNEL_SYSCALL(err, sys_msgrcv, msqid, (struct msgbuf __user *)mb, msgsz, msgtyp, msgflg);
139 
140         if (err >= 0) {
141                 len = err;
142                 mb32.mtype = mb->mtype;
143                 err = put_user(mb32.mtype, &umsgp32->mtype);
144                 err |= copy_to_user(&umsgp32->mtext, mb->mtext, len);
145                 if (err)
146                         err = -EFAULT;
147                 else
148                         err = len;
149         }
150 
151         kfree(mb);
152         return err;
153 }
154 
155 asmlinkage int sys32_sendfile(int out_fd, int in_fd, compat_off_t __user *offset, s32 count)
156 {
157         mm_segment_t old_fs = get_fs();
158         int ret;
159         off_t of;
160 
161         if (offset && get_user(of, offset))
162                 return -EFAULT;
163 
164         set_fs(KERNEL_DS);
165         ret = sys_sendfile(out_fd, in_fd, offset ? (off_t __user *)&of : NULL, count);
166         set_fs(old_fs);
167 
168         if (offset && put_user(of, offset))
169                 return -EFAULT;
170 
171         return ret;
172 }
173 
174 asmlinkage int sys32_sendfile64(int out_fd, int in_fd, compat_loff_t __user *offset, s32 count)
175 {
176         mm_segment_t old_fs = get_fs();
177         int ret;
178         loff_t lof;
179         
180         if (offset && get_user(lof, offset))
181                 return -EFAULT;
182                 
183         set_fs(KERNEL_DS);
184         ret = sys_sendfile64(out_fd, in_fd, offset ? (loff_t __user *)&lof : NULL, count);
185         set_fs(old_fs);
186         
187         if (offset && put_user(lof, offset))
188                 return -EFAULT;
189                 
190         return ret;
191 }
192 
193 
194 /* lseek() needs a wrapper because 'offset' can be negative, but the top
195  * half of the argument has been zeroed by syscall.S.
196  */
197 
198 asmlinkage int sys32_lseek(unsigned int fd, int offset, unsigned int origin)
199 {
200         return sys_lseek(fd, offset, origin);
201 }
202 
203 asmlinkage long sys32_semctl(int semid, int semnum, int cmd, union semun arg)
204 {
205         union semun u;
206         
207         if (cmd == SETVAL) {
208                 /* Ugh.  arg is a union of int,ptr,ptr,ptr, so is 8 bytes.
209                  * The int should be in the first 4, but our argument
210                  * frobbing has left it in the last 4.
211                  */
212                 u.val = *((int *)&arg + 1);
213                 return sys_semctl (semid, semnum, cmd, u);
214         }
215         return sys_semctl (semid, semnum, cmd, arg);
216 }
217 
218 long sys32_lookup_dcookie(u32 cookie_high, u32 cookie_low, char __user *buf,
219                           size_t len)
220 {
221         return sys_lookup_dcookie((u64)cookie_high << 32 | cookie_low,
222                                   buf, len);
223 }
224 
225 asmlinkage long compat_sys_fallocate(int fd, int mode, u32 offhi, u32 offlo,
226                                 u32 lenhi, u32 lenlo)
227 {
228         return sys_fallocate(fd, mode, ((loff_t)offhi << 32) | offlo,
229                              ((loff_t)lenhi << 32) | lenlo);
230 }
231 
232 asmlinkage long compat_sys_fanotify_mark(int fan_fd, int flags, u32 mask_hi,
233                                          u32 mask_lo, int fd,
234                                          const char __user *pathname)
235 {
236         return sys_fanotify_mark(fan_fd, flags, ((u64)mask_hi << 32) | mask_lo,
237                                  fd, pathname);
238 }
239 

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