245 lines
6.9 KiB
C
245 lines
6.9 KiB
C
/*
|
|
* sys_ia32.c: Conversion between 32bit and 64bit native syscalls. Based on
|
|
* sys_sparc32
|
|
*
|
|
* Copyright (C) 2000 VA Linux Co
|
|
* Copyright (C) 2000 Don Dugger <n0ano@valinux.com>
|
|
* Copyright (C) 1999 Arun Sharma <arun.sharma@intel.com>
|
|
* Copyright (C) 1997,1998 Jakub Jelinek (jj@sunsite.mff.cuni.cz)
|
|
* Copyright (C) 1997 David S. Miller (davem@caip.rutgers.edu)
|
|
* Copyright (C) 2000 Hewlett-Packard Co.
|
|
* Copyright (C) 2000 David Mosberger-Tang <davidm@hpl.hp.com>
|
|
* Copyright (C) 2000,2001,2002 Andi Kleen, SuSE Labs (x86-64 port)
|
|
*
|
|
* These routines maintain argument size conversion between 32bit and 64bit
|
|
* environment. In 2.5 most of this should be moved to a generic directory.
|
|
*
|
|
* This file assumes that there is a hole at the end of user address space.
|
|
*
|
|
* Some of the functions are LE specific currently. These are
|
|
* hopefully all marked. This should be fixed.
|
|
*/
|
|
|
|
#include <linux/kernel.h>
|
|
#include <linux/sched.h>
|
|
#include <linux/fs.h>
|
|
#include <linux/file.h>
|
|
#include <linux/signal.h>
|
|
#include <linux/syscalls.h>
|
|
#include <linux/times.h>
|
|
#include <linux/utsname.h>
|
|
#include <linux/mm.h>
|
|
#include <linux/uio.h>
|
|
#include <linux/poll.h>
|
|
#include <linux/personality.h>
|
|
#include <linux/stat.h>
|
|
#include <linux/rwsem.h>
|
|
#include <linux/compat.h>
|
|
#include <linux/vfs.h>
|
|
#include <linux/ptrace.h>
|
|
#include <linux/highuid.h>
|
|
#include <linux/sysctl.h>
|
|
#include <linux/slab.h>
|
|
#include <asm/mman.h>
|
|
#include <asm/types.h>
|
|
#include <asm/uaccess.h>
|
|
#include <linux/atomic.h>
|
|
#include <asm/vgtod.h>
|
|
#include <asm/sys_ia32.h>
|
|
|
|
#define AA(__x) ((unsigned long)(__x))
|
|
|
|
|
|
asmlinkage long sys32_truncate64(const char __user *filename,
|
|
unsigned long offset_low,
|
|
unsigned long offset_high)
|
|
{
|
|
return sys_truncate(filename, ((loff_t) offset_high << 32) | offset_low);
|
|
}
|
|
|
|
asmlinkage long sys32_ftruncate64(unsigned int fd, unsigned long offset_low,
|
|
unsigned long offset_high)
|
|
{
|
|
return sys_ftruncate(fd, ((loff_t) offset_high << 32) | offset_low);
|
|
}
|
|
|
|
/*
|
|
* Another set for IA32/LFS -- x86_64 struct stat is different due to
|
|
* support for 64bit inode numbers.
|
|
*/
|
|
static int cp_stat64(struct stat64 __user *ubuf, struct kstat *stat)
|
|
{
|
|
typeof(ubuf->st_uid) uid = 0;
|
|
typeof(ubuf->st_gid) gid = 0;
|
|
SET_UID(uid, from_kuid_munged(current_user_ns(), stat->uid));
|
|
SET_GID(gid, from_kgid_munged(current_user_ns(), stat->gid));
|
|
if (!access_ok(VERIFY_WRITE, ubuf, sizeof(struct stat64)) ||
|
|
__put_user(huge_encode_dev(stat->dev), &ubuf->st_dev) ||
|
|
__put_user(stat->ino, &ubuf->__st_ino) ||
|
|
__put_user(stat->ino, &ubuf->st_ino) ||
|
|
__put_user(stat->mode, &ubuf->st_mode) ||
|
|
__put_user(stat->nlink, &ubuf->st_nlink) ||
|
|
__put_user(uid, &ubuf->st_uid) ||
|
|
__put_user(gid, &ubuf->st_gid) ||
|
|
__put_user(huge_encode_dev(stat->rdev), &ubuf->st_rdev) ||
|
|
__put_user(stat->size, &ubuf->st_size) ||
|
|
__put_user(stat->atime.tv_sec, &ubuf->st_atime) ||
|
|
__put_user(stat->atime.tv_nsec, &ubuf->st_atime_nsec) ||
|
|
__put_user(stat->mtime.tv_sec, &ubuf->st_mtime) ||
|
|
__put_user(stat->mtime.tv_nsec, &ubuf->st_mtime_nsec) ||
|
|
__put_user(stat->ctime.tv_sec, &ubuf->st_ctime) ||
|
|
__put_user(stat->ctime.tv_nsec, &ubuf->st_ctime_nsec) ||
|
|
__put_user(stat->blksize, &ubuf->st_blksize) ||
|
|
__put_user(stat->blocks, &ubuf->st_blocks))
|
|
return -EFAULT;
|
|
return 0;
|
|
}
|
|
|
|
asmlinkage long sys32_stat64(const char __user *filename,
|
|
struct stat64 __user *statbuf)
|
|
{
|
|
struct kstat stat;
|
|
int ret = vfs_stat(filename, &stat);
|
|
|
|
if (!ret)
|
|
ret = cp_stat64(statbuf, &stat);
|
|
return ret;
|
|
}
|
|
|
|
asmlinkage long sys32_lstat64(const char __user *filename,
|
|
struct stat64 __user *statbuf)
|
|
{
|
|
struct kstat stat;
|
|
int ret = vfs_lstat(filename, &stat);
|
|
if (!ret)
|
|
ret = cp_stat64(statbuf, &stat);
|
|
return ret;
|
|
}
|
|
|
|
asmlinkage long sys32_fstat64(unsigned int fd, struct stat64 __user *statbuf)
|
|
{
|
|
struct kstat stat;
|
|
int ret = vfs_fstat(fd, &stat);
|
|
if (!ret)
|
|
ret = cp_stat64(statbuf, &stat);
|
|
return ret;
|
|
}
|
|
|
|
asmlinkage long sys32_fstatat(unsigned int dfd, const char __user *filename,
|
|
struct stat64 __user *statbuf, int flag)
|
|
{
|
|
struct kstat stat;
|
|
int error;
|
|
|
|
error = vfs_fstatat(dfd, filename, &stat, flag);
|
|
if (error)
|
|
return error;
|
|
return cp_stat64(statbuf, &stat);
|
|
}
|
|
|
|
/*
|
|
* Linux/i386 didn't use to be able to handle more than
|
|
* 4 system call parameters, so these system calls used a memory
|
|
* block for parameter passing..
|
|
*/
|
|
|
|
struct mmap_arg_struct32 {
|
|
unsigned int addr;
|
|
unsigned int len;
|
|
unsigned int prot;
|
|
unsigned int flags;
|
|
unsigned int fd;
|
|
unsigned int offset;
|
|
};
|
|
|
|
asmlinkage long sys32_mmap(struct mmap_arg_struct32 __user *arg)
|
|
{
|
|
struct mmap_arg_struct32 a;
|
|
|
|
if (copy_from_user(&a, arg, sizeof(a)))
|
|
return -EFAULT;
|
|
|
|
if (a.offset & ~PAGE_MASK)
|
|
return -EINVAL;
|
|
|
|
return sys_mmap_pgoff(a.addr, a.len, a.prot, a.flags, a.fd,
|
|
a.offset>>PAGE_SHIFT);
|
|
}
|
|
|
|
asmlinkage long sys32_waitpid(compat_pid_t pid, unsigned int __user *stat_addr,
|
|
int options)
|
|
{
|
|
return compat_sys_wait4(pid, stat_addr, options, NULL);
|
|
}
|
|
|
|
/* warning: next two assume little endian */
|
|
asmlinkage long sys32_pread(unsigned int fd, char __user *ubuf, u32 count,
|
|
u32 poslo, u32 poshi)
|
|
{
|
|
return sys_pread64(fd, ubuf, count,
|
|
((loff_t)AA(poshi) << 32) | AA(poslo));
|
|
}
|
|
|
|
asmlinkage long sys32_pwrite(unsigned int fd, const char __user *ubuf,
|
|
u32 count, u32 poslo, u32 poshi)
|
|
{
|
|
return sys_pwrite64(fd, ubuf, count,
|
|
((loff_t)AA(poshi) << 32) | AA(poslo));
|
|
}
|
|
|
|
|
|
/*
|
|
* Some system calls that need sign extended arguments. This could be
|
|
* done by a generic wrapper.
|
|
*/
|
|
long sys32_fadvise64_64(int fd, __u32 offset_low, __u32 offset_high,
|
|
__u32 len_low, __u32 len_high, int advice)
|
|
{
|
|
return sys_fadvise64_64(fd,
|
|
(((u64)offset_high)<<32) | offset_low,
|
|
(((u64)len_high)<<32) | len_low,
|
|
advice);
|
|
}
|
|
|
|
long sys32_vm86_warning(void)
|
|
{
|
|
struct task_struct *me = current;
|
|
static char lastcomm[sizeof(me->comm)];
|
|
|
|
if (strncmp(lastcomm, me->comm, sizeof(lastcomm))) {
|
|
compat_printk(KERN_INFO
|
|
"%s: vm86 mode not supported on 64 bit kernel\n",
|
|
me->comm);
|
|
strncpy(lastcomm, me->comm, sizeof(lastcomm));
|
|
}
|
|
return -ENOSYS;
|
|
}
|
|
|
|
asmlinkage ssize_t sys32_readahead(int fd, unsigned off_lo, unsigned off_hi,
|
|
size_t count)
|
|
{
|
|
return sys_readahead(fd, ((u64)off_hi << 32) | off_lo, count);
|
|
}
|
|
|
|
asmlinkage long sys32_sync_file_range(int fd, unsigned off_low, unsigned off_hi,
|
|
unsigned n_low, unsigned n_hi, int flags)
|
|
{
|
|
return sys_sync_file_range(fd,
|
|
((u64)off_hi << 32) | off_low,
|
|
((u64)n_hi << 32) | n_low, flags);
|
|
}
|
|
|
|
asmlinkage long sys32_fadvise64(int fd, unsigned offset_lo, unsigned offset_hi,
|
|
size_t len, int advice)
|
|
{
|
|
return sys_fadvise64_64(fd, ((u64)offset_hi << 32) | offset_lo,
|
|
len, advice);
|
|
}
|
|
|
|
asmlinkage long sys32_fallocate(int fd, int mode, unsigned offset_lo,
|
|
unsigned offset_hi, unsigned len_lo,
|
|
unsigned len_hi)
|
|
{
|
|
return sys_fallocate(fd, mode, ((u64)offset_hi << 32) | offset_lo,
|
|
((u64)len_hi << 32) | len_lo);
|
|
}
|