/*
* sys_parisc32.c: Conversion between 32bit and 64bit native syscalls.
*
* Copyright (C) 2000-2001 Hewlett Packard Company
* Copyright (C) 2000 John Marvin
* Copyright (C) 2001 Matthew Wilcox
*
* These routines maintain argument size conversion between 32bit and 64bit
* environment. Based heavily on sys_ia32.c and sys_sparc32.c.
*/
#include <linux/compat.h>
#include <linux/kernel.h>
#include <linux/sched.h>
#include <linux/fs.h>
#include <linux/mm.h>
#include <linux/file.h>
#include <linux/signal.h>
#include <linux/resource.h>
#include <linux/times.h>
#include <linux/utsname.h>
#include <linux/time.h>
#include <linux/smp.h>
#include <linux/smp_lock.h>
#include <linux/sem.h>
#include <linux/msg.h>
#include <linux/shm.h>
#include <linux/slab.h>
#include <linux/uio.h>
#include <linux/nfs_fs.h>
#include <linux/ncp_fs.h>
#include <linux/sunrpc/svc.h>
#include <linux/nfsd/nfsd.h>
#include <linux/nfsd/cache.h>
#include <linux/nfsd/xdr.h>
#include <linux/nfsd/syscall.h>
#include <linux/poll.h>
#include <linux/personality.h>
#include <linux/stat.h>
#include <linux/highmem.h>
#include <linux/highuid.h>
#include <linux/mman.h>
#include <linux/binfmts.h>
#include <linux/namei.h>
#include <linux/vfs.h>
#include <linux/ptrace.h>
#include <linux/swap.h>
#include <linux/syscalls.h>
#include <asm/types.h>
#include <asm/uaccess.h>
#include <asm/mmu_context.h>
#include "sys32.h"
#undef DEBUG
#ifdef DEBUG
#define DBG(x) printk x
#else
#define DBG(x)
#endif
/*
* sys32_execve() executes a new program.
*/
asmlinkage int sys32_execve(struct pt_regs *regs)
{
int error;
char *filename;
DBG(("sys32_execve(%p) r26 = 0x%lx\n", regs, regs->gr[26]));
filename = getname((const char __user *) regs->gr[26]);
error = PTR_ERR(filename);
if (IS_ERR(filename))
goto out;
error = compat_do_execve(filename, compat_ptr(regs->gr[25]),
compat_ptr(regs->gr[24]), regs);
if (error == 0) {
task_lock(current);
current->ptrace &= ~PT_DTRACE;
task_unlock(current);
}
putname(filename);
out:
return error;
}
asmlinkage long sys32_unimplemented(int r26, int r25, int r24, int r23,
int r22, int r21, int r20)
{
printk(KERN_ERR "%s(%d): Unimplemented 32 on 64 syscall #%d!\n",
current->comm, current->pid, r20);
return -ENOSYS;
}
#ifdef CONFIG_SYSCTL
struct __sysctl_args32 {
u32 name;
int nlen;
u32 oldval;
u32 oldlenp;
u32 newval;
u32 newlen;
u32 __unused[4];
};
asmlinkage long sys32_sysctl(struct __sysctl_args32 __user *args)
{
#ifndef CONFIG_SYSCTL_SYSCALL
return -ENOSYS;
#else
struct __sysctl_args32 tmp;
int error;
unsigned int oldlen32;
size_t oldlen, __user *oldlenp = NULL;
unsigned long addr = (((long __force)&args->__unused[0]) + 7) & ~7;
DBG(("sysctl32(%p)\n", args));
if (copy_from_user(&tmp, args, sizeof(tmp)))
return -EFAULT;
if (tmp.oldval && tmp.oldlenp) {
/* Duh, this is ugly and might not work if sysctl_args
is in read-only memory, but do_sysctl does indirectly
a lot of uaccess in both directions and we'd have to
basically copy the whole sysctl.c here, and
glibc's __sysctl uses rw memory for the structure
anyway. */
/* a possibly better hack than this, which will avoid the
* problem if the struct is read only, is to push the
* 'oldlen' value out to the user's stack instead. -PB
*/
if (get_user(oldlen32, (u32 *)(u64)tmp.oldlenp))
return -EFAULT;
oldlen = oldlen32;
if (put_user(oldlen, (size_t *)addr))
return -EFAULT;
oldlenp = (size_t *)addr;
}
lock_kernel();
error = do_sysctl((int __user *)(u64)tmp.name, tmp.nlen,
(void __user *)(u64)tmp.oldval, oldlenp,
(void __user *)(u64)tmp.newval, tmp.newlen);
unlock_kernel();
if (oldlenp) {
if (!error) {
if (get_user(oldlen, (size_t *)addr)) {
error = -EFAULT;
} else {
oldlen32 = oldlen;
if (put_user(oldlen32, (u32 *)(u64)tmp.oldlenp))
error = -EFAULT;
}
}
if (copy_to_user(args->__unused, tmp.__unused, sizeof(tmp.__unused)))
error = -EFAULT;
}
return error;
#endif
}
#endif /* CONFIG_SYSCTL */
asmlinkage long sys32_sched_rr_get_interval(pid_t pid,
struct compat_timespec __user *interval)
{
struct timespec t;
int ret;
KERNEL_SYSCALL(ret, sys_sched_rr_get_interval, pid, (struct timespec __user *)&t);
if (put_compat_timespec(&t, interval))
return -EFAULT;
return ret;
}
/*** copied from mips64 ***/
/*
* Ooo, nasty. We need here to frob 32-bit unsigned longs to
* 64-bit unsigned longs.
*/
static inline int
get_fd_set32(unsigned long n, u32 *ufdset, unsigned long *fdset)
{
n = (n + 8*sizeof(u32) - 1) / (8*sizeof(u32));
if (ufdset) {
unsigned long odd;
if (!access_ok(VERIFY_WRITE, ufdset, n*sizeof(u32)))
return -EFAULT;
odd = n & 1UL;
n &= ~1UL;
while (n) {
unsigned long h, l;
__get_user(l, ufdset);
__get_user(h, ufdset+1);
ufdset += 2;
*fdset++ = h << 32 | l;
n -= 2;
}
if (odd)
__get_user(*fdset, ufdset);
} else {
/* Tricky, must clear full unsigned long in the
* kernel fdset at the end, this makes sure that
* actually happens.
*/
memset(fdset, 0, ((n + 1) & ~1)*sizeof(u32));
}
return 0;
}
static inline void
set_fd_set32(unsigned long n, u32 *ufdset, unsigned long *fdset)
{
unsigned long odd;
n = (n + 8*sizeof(u32) - 1) / (8*sizeof(u32));
if (!ufdset)
return;
odd = n & 1UL;
n &= ~1UL;
while (n) {
unsigned long h, l;
l = *fdset++;
h = l >> 32;
__put_user(l, ufdset);
__put_user(h, ufdset+1);
ufdset += 2;
n -= 2;
}
if (odd)
__put_user(*fdset, ufdset);
}
struct msgbuf32 {
int mtype;
char mtext[1];
};
asmlinkage long sys32_msgsnd(int msqid,
struct msgbuf32 __user *umsgp32,
size_t msgsz, int msgflg)
{
struct msgbuf *mb;
struct msgbuf32 mb32;
int err;
if ((mb = kmalloc(msgsz + sizeof *mb + 4, GFP_KERNEL)) == NULL)
return -ENOMEM;
err = get_user(mb32.mtype, &umsgp32->mtype);
mb->mtype = mb32.mtype;
err |= copy_from_user(mb->mtext, &umsgp32->mtext, msgsz);
if (err)
err = -EFAULT;
else
KERNEL_SYSCALL(err, sys_msgsnd, msqid, (struct msgbuf __user *)mb, msgsz, msgflg);
kfree(mb);
return err;
}
asmlinkage long sys32_msgrcv(int msqid,
struct msgbuf32 __user *umsgp32,
size_t msgsz, long msgtyp, int msgflg)
{
struct msgbuf *mb;
struct msgbuf32 mb32;
int err, len;
if ((mb = kmalloc(msgsz + sizeof *mb + 4, GFP_KERNEL)) == NULL)
return -ENOMEM;
KERNEL_SYSCALL(err, sys_msgrcv, msqid, (struct msgbuf __user *)mb, msgsz, msgtyp, msgflg);
if (err >= 0) {
len = err;
mb32.mtype = mb->mtype;
err = put_user(mb32.mtype, &umsgp32->mtype);
err |= copy_to_user(&umsgp32->mtext, mb->mtext, len);
if (err)
err = -EFAULT;
else
err = len;
}
kfree(mb);
return err;
}
asmlinkage int sys32_sendfile(int out_fd, int in_fd, compat_off_t __user *offset, s32 count)
{
mm_segment_t old_fs = get_fs();
int ret;
off_t of;
if (offset && get_user(of, offset))
return -EFAULT;
set_fs(KERNEL_DS);
ret = sys_sendfile(out_fd, in_fd, offset ? (off_t __user *)&of : NULL, count);
set_fs(old_fs);
if (offset && put_user(of, offset))
return -EFAULT;
return ret;
}
asmlinkage int sys32_sendfile64(int out_fd, int in_fd, compat_loff_t __user *offset, s32 count)
{
mm_segment_t old_fs = get_fs();
int ret;
loff_t lof;
if (offset && get_user(lof, offset))
return -EFAULT;
set_fs(KERNEL_DS);
ret = sys_sendfile64(out_fd, in_fd, offset ? (loff_t __user *)&lof : NULL, count);
set_fs(old_fs);
if (offset && put_user(lof, offset))
return -EFAULT;
return ret;
}
/* lseek() needs a wrapper because 'offset' can be negative, but the top
* half of the argument has been zeroed by syscall.S.
*/
asmlinkage int sys32_lseek(unsigned int fd, int offset, unsigned int origin)
{
return sys_lseek(fd, offset, origin);
}
asmlinkage long sys32_semctl(int semid, int semnum, int cmd, union semun arg)
{
union semun u;
if (cmd == SETVAL) {
/* Ugh. arg is a union of int,ptr,ptr,ptr, so is 8 bytes.
* The int should be in the first 4, but our argument
* frobbing has left it in the last 4.
*/
u.val = *((int *)&arg + 1);
return sys_semctl (semid, semnum, cmd, u);
}
return sys_semctl (semid, semnum, cmd, arg);
}
long sys32_lookup_dcookie(u32 cookie_high, u32 cookie_low, char __user *buf,
size_t len)
{
return sys_lookup_dcookie((u64)cookie_high << 32 | cookie_low,
buf, len);
}
asmlinkage long compat_sys_fallocate(int fd, int mode, u32 offhi, u32 offlo,
u32 lenhi, u32 lenlo)
{
return sys_fallocate(fd, mode, ((loff_t)offhi << 32) | offlo,
((loff_t)lenhi << 32) | lenlo);
}
