659 lines
17 KiB
C
659 lines
17 KiB
C
/*
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* sys_ia32.c: Conversion between 32bit and 64bit native syscalls. Based on
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* sys_sparc32
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*
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* Copyright (C) 2000 VA Linux Co
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* Copyright (C) 2000 Don Dugger <n0ano@valinux.com>
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* Copyright (C) 1999 Arun Sharma <arun.sharma@intel.com>
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* Copyright (C) 1997,1998 Jakub Jelinek (jj@sunsite.mff.cuni.cz)
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* Copyright (C) 1997 David S. Miller (davem@caip.rutgers.edu)
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* Copyright (C) 2000 Hewlett-Packard Co.
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* Copyright (C) 2000 David Mosberger-Tang <davidm@hpl.hp.com>
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* Copyright (C) 2000,2001,2002 Andi Kleen, SuSE Labs (x86-64 port)
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*
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* These routines maintain argument size conversion between 32bit and 64bit
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* environment. In 2.5 most of this should be moved to a generic directory.
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*
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* This file assumes that there is a hole at the end of user address space.
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*
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* Some of the functions are LE specific currently. These are
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* hopefully all marked. This should be fixed.
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*/
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#include <linux/kernel.h>
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#include <linux/sched.h>
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#include <linux/fs.h>
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#include <linux/file.h>
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#include <linux/signal.h>
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#include <linux/syscalls.h>
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#include <linux/times.h>
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#include <linux/utsname.h>
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#include <linux/smp_lock.h>
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#include <linux/mm.h>
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#include <linux/uio.h>
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#include <linux/poll.h>
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#include <linux/personality.h>
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#include <linux/stat.h>
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#include <linux/rwsem.h>
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#include <linux/compat.h>
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#include <linux/vfs.h>
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#include <linux/ptrace.h>
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#include <linux/highuid.h>
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#include <linux/sysctl.h>
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#include <asm/mman.h>
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#include <asm/types.h>
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#include <asm/uaccess.h>
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#include <asm/atomic.h>
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#include <asm/vgtod.h>
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#include <asm/sys_ia32.h>
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#define AA(__x) ((unsigned long)(__x))
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asmlinkage long sys32_truncate64(char __user *filename,
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unsigned long offset_low,
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unsigned long offset_high)
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{
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return sys_truncate(filename, ((loff_t) offset_high << 32) | offset_low);
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}
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asmlinkage long sys32_ftruncate64(unsigned int fd, unsigned long offset_low,
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unsigned long offset_high)
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{
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return sys_ftruncate(fd, ((loff_t) offset_high << 32) | offset_low);
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}
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/*
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* Another set for IA32/LFS -- x86_64 struct stat is different due to
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* support for 64bit inode numbers.
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*/
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static int cp_stat64(struct stat64 __user *ubuf, struct kstat *stat)
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{
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typeof(ubuf->st_uid) uid = 0;
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typeof(ubuf->st_gid) gid = 0;
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SET_UID(uid, stat->uid);
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SET_GID(gid, stat->gid);
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if (!access_ok(VERIFY_WRITE, ubuf, sizeof(struct stat64)) ||
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__put_user(huge_encode_dev(stat->dev), &ubuf->st_dev) ||
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__put_user(stat->ino, &ubuf->__st_ino) ||
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__put_user(stat->ino, &ubuf->st_ino) ||
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__put_user(stat->mode, &ubuf->st_mode) ||
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__put_user(stat->nlink, &ubuf->st_nlink) ||
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__put_user(uid, &ubuf->st_uid) ||
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__put_user(gid, &ubuf->st_gid) ||
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__put_user(huge_encode_dev(stat->rdev), &ubuf->st_rdev) ||
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__put_user(stat->size, &ubuf->st_size) ||
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__put_user(stat->atime.tv_sec, &ubuf->st_atime) ||
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__put_user(stat->atime.tv_nsec, &ubuf->st_atime_nsec) ||
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__put_user(stat->mtime.tv_sec, &ubuf->st_mtime) ||
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__put_user(stat->mtime.tv_nsec, &ubuf->st_mtime_nsec) ||
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__put_user(stat->ctime.tv_sec, &ubuf->st_ctime) ||
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__put_user(stat->ctime.tv_nsec, &ubuf->st_ctime_nsec) ||
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__put_user(stat->blksize, &ubuf->st_blksize) ||
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__put_user(stat->blocks, &ubuf->st_blocks))
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return -EFAULT;
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return 0;
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}
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asmlinkage long sys32_stat64(char __user *filename,
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struct stat64 __user *statbuf)
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{
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struct kstat stat;
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int ret = vfs_stat(filename, &stat);
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if (!ret)
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ret = cp_stat64(statbuf, &stat);
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return ret;
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}
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asmlinkage long sys32_lstat64(char __user *filename,
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struct stat64 __user *statbuf)
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{
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struct kstat stat;
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int ret = vfs_lstat(filename, &stat);
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if (!ret)
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ret = cp_stat64(statbuf, &stat);
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return ret;
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}
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asmlinkage long sys32_fstat64(unsigned int fd, struct stat64 __user *statbuf)
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{
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struct kstat stat;
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int ret = vfs_fstat(fd, &stat);
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if (!ret)
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ret = cp_stat64(statbuf, &stat);
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return ret;
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}
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asmlinkage long sys32_fstatat(unsigned int dfd, char __user *filename,
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struct stat64 __user *statbuf, int flag)
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{
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struct kstat stat;
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int error;
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error = vfs_fstatat(dfd, filename, &stat, flag);
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if (error)
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return error;
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return cp_stat64(statbuf, &stat);
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}
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/*
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* Linux/i386 didn't use to be able to handle more than
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* 4 system call parameters, so these system calls used a memory
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* block for parameter passing..
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*/
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struct mmap_arg_struct {
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unsigned int addr;
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unsigned int len;
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unsigned int prot;
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unsigned int flags;
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unsigned int fd;
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unsigned int offset;
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};
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asmlinkage long sys32_mmap(struct mmap_arg_struct __user *arg)
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{
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struct mmap_arg_struct a;
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struct file *file = NULL;
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unsigned long retval;
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struct mm_struct *mm ;
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if (copy_from_user(&a, arg, sizeof(a)))
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return -EFAULT;
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if (a.offset & ~PAGE_MASK)
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return -EINVAL;
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if (!(a.flags & MAP_ANONYMOUS)) {
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file = fget(a.fd);
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if (!file)
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return -EBADF;
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}
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mm = current->mm;
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down_write(&mm->mmap_sem);
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retval = do_mmap_pgoff(file, a.addr, a.len, a.prot, a.flags,
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a.offset>>PAGE_SHIFT);
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if (file)
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fput(file);
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up_write(&mm->mmap_sem);
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return retval;
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}
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asmlinkage long sys32_mprotect(unsigned long start, size_t len,
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unsigned long prot)
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{
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return sys_mprotect(start, len, prot);
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}
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asmlinkage long sys32_rt_sigaction(int sig, struct sigaction32 __user *act,
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struct sigaction32 __user *oact,
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unsigned int sigsetsize)
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{
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struct k_sigaction new_ka, old_ka;
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int ret;
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compat_sigset_t set32;
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/* XXX: Don't preclude handling different sized sigset_t's. */
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if (sigsetsize != sizeof(compat_sigset_t))
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return -EINVAL;
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if (act) {
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compat_uptr_t handler, restorer;
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if (!access_ok(VERIFY_READ, act, sizeof(*act)) ||
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__get_user(handler, &act->sa_handler) ||
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__get_user(new_ka.sa.sa_flags, &act->sa_flags) ||
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__get_user(restorer, &act->sa_restorer) ||
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__copy_from_user(&set32, &act->sa_mask,
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sizeof(compat_sigset_t)))
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return -EFAULT;
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new_ka.sa.sa_handler = compat_ptr(handler);
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new_ka.sa.sa_restorer = compat_ptr(restorer);
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/*
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* FIXME: here we rely on _COMPAT_NSIG_WORS to be >=
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* than _NSIG_WORDS << 1
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*/
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switch (_NSIG_WORDS) {
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case 4: new_ka.sa.sa_mask.sig[3] = set32.sig[6]
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| (((long)set32.sig[7]) << 32);
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case 3: new_ka.sa.sa_mask.sig[2] = set32.sig[4]
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| (((long)set32.sig[5]) << 32);
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case 2: new_ka.sa.sa_mask.sig[1] = set32.sig[2]
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| (((long)set32.sig[3]) << 32);
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case 1: new_ka.sa.sa_mask.sig[0] = set32.sig[0]
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| (((long)set32.sig[1]) << 32);
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}
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}
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ret = do_sigaction(sig, act ? &new_ka : NULL, oact ? &old_ka : NULL);
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if (!ret && oact) {
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/*
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* FIXME: here we rely on _COMPAT_NSIG_WORS to be >=
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* than _NSIG_WORDS << 1
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*/
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switch (_NSIG_WORDS) {
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case 4:
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set32.sig[7] = (old_ka.sa.sa_mask.sig[3] >> 32);
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set32.sig[6] = old_ka.sa.sa_mask.sig[3];
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case 3:
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set32.sig[5] = (old_ka.sa.sa_mask.sig[2] >> 32);
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set32.sig[4] = old_ka.sa.sa_mask.sig[2];
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case 2:
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set32.sig[3] = (old_ka.sa.sa_mask.sig[1] >> 32);
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set32.sig[2] = old_ka.sa.sa_mask.sig[1];
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case 1:
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set32.sig[1] = (old_ka.sa.sa_mask.sig[0] >> 32);
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set32.sig[0] = old_ka.sa.sa_mask.sig[0];
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}
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if (!access_ok(VERIFY_WRITE, oact, sizeof(*oact)) ||
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__put_user(ptr_to_compat(old_ka.sa.sa_handler),
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&oact->sa_handler) ||
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__put_user(ptr_to_compat(old_ka.sa.sa_restorer),
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&oact->sa_restorer) ||
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__put_user(old_ka.sa.sa_flags, &oact->sa_flags) ||
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__copy_to_user(&oact->sa_mask, &set32,
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sizeof(compat_sigset_t)))
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return -EFAULT;
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}
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return ret;
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}
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asmlinkage long sys32_sigaction(int sig, struct old_sigaction32 __user *act,
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struct old_sigaction32 __user *oact)
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{
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struct k_sigaction new_ka, old_ka;
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int ret;
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if (act) {
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compat_old_sigset_t mask;
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compat_uptr_t handler, restorer;
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if (!access_ok(VERIFY_READ, act, sizeof(*act)) ||
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__get_user(handler, &act->sa_handler) ||
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__get_user(new_ka.sa.sa_flags, &act->sa_flags) ||
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__get_user(restorer, &act->sa_restorer) ||
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__get_user(mask, &act->sa_mask))
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return -EFAULT;
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new_ka.sa.sa_handler = compat_ptr(handler);
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new_ka.sa.sa_restorer = compat_ptr(restorer);
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siginitset(&new_ka.sa.sa_mask, mask);
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}
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ret = do_sigaction(sig, act ? &new_ka : NULL, oact ? &old_ka : NULL);
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if (!ret && oact) {
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if (!access_ok(VERIFY_WRITE, oact, sizeof(*oact)) ||
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__put_user(ptr_to_compat(old_ka.sa.sa_handler),
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&oact->sa_handler) ||
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__put_user(ptr_to_compat(old_ka.sa.sa_restorer),
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&oact->sa_restorer) ||
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__put_user(old_ka.sa.sa_flags, &oact->sa_flags) ||
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__put_user(old_ka.sa.sa_mask.sig[0], &oact->sa_mask))
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return -EFAULT;
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}
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return ret;
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}
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asmlinkage long sys32_rt_sigprocmask(int how, compat_sigset_t __user *set,
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compat_sigset_t __user *oset,
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unsigned int sigsetsize)
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{
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sigset_t s;
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compat_sigset_t s32;
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int ret;
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mm_segment_t old_fs = get_fs();
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if (set) {
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if (copy_from_user(&s32, set, sizeof(compat_sigset_t)))
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return -EFAULT;
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switch (_NSIG_WORDS) {
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case 4: s.sig[3] = s32.sig[6] | (((long)s32.sig[7]) << 32);
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case 3: s.sig[2] = s32.sig[4] | (((long)s32.sig[5]) << 32);
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case 2: s.sig[1] = s32.sig[2] | (((long)s32.sig[3]) << 32);
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case 1: s.sig[0] = s32.sig[0] | (((long)s32.sig[1]) << 32);
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}
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}
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set_fs(KERNEL_DS);
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ret = sys_rt_sigprocmask(how,
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set ? (sigset_t __user *)&s : NULL,
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oset ? (sigset_t __user *)&s : NULL,
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sigsetsize);
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set_fs(old_fs);
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if (ret)
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return ret;
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if (oset) {
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switch (_NSIG_WORDS) {
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case 4: s32.sig[7] = (s.sig[3] >> 32); s32.sig[6] = s.sig[3];
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case 3: s32.sig[5] = (s.sig[2] >> 32); s32.sig[4] = s.sig[2];
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case 2: s32.sig[3] = (s.sig[1] >> 32); s32.sig[2] = s.sig[1];
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case 1: s32.sig[1] = (s.sig[0] >> 32); s32.sig[0] = s.sig[0];
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}
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if (copy_to_user(oset, &s32, sizeof(compat_sigset_t)))
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return -EFAULT;
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}
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return 0;
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}
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asmlinkage long sys32_alarm(unsigned int seconds)
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{
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return alarm_setitimer(seconds);
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}
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struct sel_arg_struct {
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unsigned int n;
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unsigned int inp;
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unsigned int outp;
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unsigned int exp;
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unsigned int tvp;
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};
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asmlinkage long sys32_old_select(struct sel_arg_struct __user *arg)
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{
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struct sel_arg_struct a;
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if (copy_from_user(&a, arg, sizeof(a)))
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return -EFAULT;
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return compat_sys_select(a.n, compat_ptr(a.inp), compat_ptr(a.outp),
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compat_ptr(a.exp), compat_ptr(a.tvp));
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}
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asmlinkage long sys32_waitpid(compat_pid_t pid, unsigned int *stat_addr,
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int options)
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{
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return compat_sys_wait4(pid, stat_addr, options, NULL);
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}
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/* 32-bit timeval and related flotsam. */
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asmlinkage long sys32_sysfs(int option, u32 arg1, u32 arg2)
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{
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return sys_sysfs(option, arg1, arg2);
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}
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asmlinkage long sys32_sched_rr_get_interval(compat_pid_t pid,
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struct compat_timespec __user *interval)
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{
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struct timespec t;
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int ret;
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mm_segment_t old_fs = get_fs();
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set_fs(KERNEL_DS);
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ret = sys_sched_rr_get_interval(pid, (struct timespec __user *)&t);
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set_fs(old_fs);
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if (put_compat_timespec(&t, interval))
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return -EFAULT;
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return ret;
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}
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asmlinkage long sys32_rt_sigpending(compat_sigset_t __user *set,
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compat_size_t sigsetsize)
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{
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sigset_t s;
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compat_sigset_t s32;
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int ret;
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mm_segment_t old_fs = get_fs();
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set_fs(KERNEL_DS);
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ret = sys_rt_sigpending((sigset_t __user *)&s, sigsetsize);
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set_fs(old_fs);
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if (!ret) {
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switch (_NSIG_WORDS) {
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case 4: s32.sig[7] = (s.sig[3] >> 32); s32.sig[6] = s.sig[3];
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case 3: s32.sig[5] = (s.sig[2] >> 32); s32.sig[4] = s.sig[2];
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case 2: s32.sig[3] = (s.sig[1] >> 32); s32.sig[2] = s.sig[1];
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case 1: s32.sig[1] = (s.sig[0] >> 32); s32.sig[0] = s.sig[0];
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}
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if (copy_to_user(set, &s32, sizeof(compat_sigset_t)))
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return -EFAULT;
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}
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return ret;
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}
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asmlinkage long sys32_rt_sigqueueinfo(int pid, int sig,
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compat_siginfo_t __user *uinfo)
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{
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siginfo_t info;
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int ret;
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mm_segment_t old_fs = get_fs();
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if (copy_siginfo_from_user32(&info, uinfo))
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return -EFAULT;
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set_fs(KERNEL_DS);
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ret = sys_rt_sigqueueinfo(pid, sig, (siginfo_t __user *)&info);
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set_fs(old_fs);
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return ret;
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}
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/* warning: next two assume little endian */
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asmlinkage long sys32_pread(unsigned int fd, char __user *ubuf, u32 count,
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u32 poslo, u32 poshi)
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{
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return sys_pread64(fd, ubuf, count,
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((loff_t)AA(poshi) << 32) | AA(poslo));
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}
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asmlinkage long sys32_pwrite(unsigned int fd, char __user *ubuf, u32 count,
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u32 poslo, u32 poshi)
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{
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return sys_pwrite64(fd, ubuf, count,
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((loff_t)AA(poshi) << 32) | AA(poslo));
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}
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asmlinkage long sys32_personality(unsigned long personality)
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{
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int ret;
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if (personality(current->personality) == PER_LINUX32 &&
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personality == PER_LINUX)
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personality = PER_LINUX32;
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ret = sys_personality(personality);
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if (ret == PER_LINUX32)
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ret = PER_LINUX;
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return ret;
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}
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asmlinkage long 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 long sys32_mmap2(unsigned long addr, unsigned long len,
|
|
unsigned long prot, unsigned long flags,
|
|
unsigned long fd, unsigned long pgoff)
|
|
{
|
|
struct mm_struct *mm = current->mm;
|
|
unsigned long error;
|
|
struct file *file = NULL;
|
|
|
|
flags &= ~(MAP_EXECUTABLE | MAP_DENYWRITE);
|
|
if (!(flags & MAP_ANONYMOUS)) {
|
|
file = fget(fd);
|
|
if (!file)
|
|
return -EBADF;
|
|
}
|
|
|
|
down_write(&mm->mmap_sem);
|
|
error = do_mmap_pgoff(file, addr, len, prot, flags, pgoff);
|
|
up_write(&mm->mmap_sem);
|
|
|
|
if (file)
|
|
fput(file);
|
|
return error;
|
|
}
|
|
|
|
asmlinkage long sys32_olduname(struct oldold_utsname __user *name)
|
|
{
|
|
char *arch = "x86_64";
|
|
int err;
|
|
|
|
if (!name)
|
|
return -EFAULT;
|
|
if (!access_ok(VERIFY_WRITE, name, sizeof(struct oldold_utsname)))
|
|
return -EFAULT;
|
|
|
|
down_read(&uts_sem);
|
|
|
|
err = __copy_to_user(&name->sysname, &utsname()->sysname,
|
|
__OLD_UTS_LEN);
|
|
err |= __put_user(0, name->sysname+__OLD_UTS_LEN);
|
|
err |= __copy_to_user(&name->nodename, &utsname()->nodename,
|
|
__OLD_UTS_LEN);
|
|
err |= __put_user(0, name->nodename+__OLD_UTS_LEN);
|
|
err |= __copy_to_user(&name->release, &utsname()->release,
|
|
__OLD_UTS_LEN);
|
|
err |= __put_user(0, name->release+__OLD_UTS_LEN);
|
|
err |= __copy_to_user(&name->version, &utsname()->version,
|
|
__OLD_UTS_LEN);
|
|
err |= __put_user(0, name->version+__OLD_UTS_LEN);
|
|
|
|
if (personality(current->personality) == PER_LINUX32)
|
|
arch = "i686";
|
|
|
|
err |= __copy_to_user(&name->machine, arch, strlen(arch) + 1);
|
|
|
|
up_read(&uts_sem);
|
|
|
|
err = err ? -EFAULT : 0;
|
|
|
|
return err;
|
|
}
|
|
|
|
long sys32_uname(struct old_utsname __user *name)
|
|
{
|
|
int err;
|
|
|
|
if (!name)
|
|
return -EFAULT;
|
|
down_read(&uts_sem);
|
|
err = copy_to_user(name, utsname(), sizeof(*name));
|
|
up_read(&uts_sem);
|
|
if (personality(current->personality) == PER_LINUX32)
|
|
err |= copy_to_user(&name->machine, "i686", 5);
|
|
|
|
return err ? -EFAULT : 0;
|
|
}
|
|
|
|
asmlinkage long sys32_execve(char __user *name, compat_uptr_t __user *argv,
|
|
compat_uptr_t __user *envp, struct pt_regs *regs)
|
|
{
|
|
long error;
|
|
char *filename;
|
|
|
|
filename = getname(name);
|
|
error = PTR_ERR(filename);
|
|
if (IS_ERR(filename))
|
|
return error;
|
|
error = compat_do_execve(filename, argv, envp, regs);
|
|
putname(filename);
|
|
return error;
|
|
}
|
|
|
|
asmlinkage long sys32_clone(unsigned int clone_flags, unsigned int newsp,
|
|
struct pt_regs *regs)
|
|
{
|
|
void __user *parent_tid = (void __user *)regs->dx;
|
|
void __user *child_tid = (void __user *)regs->di;
|
|
|
|
if (!newsp)
|
|
newsp = regs->sp;
|
|
return do_fork(clone_flags, newsp, regs, 0, parent_tid, child_tid);
|
|
}
|
|
|
|
/*
|
|
* Some system calls that need sign extended arguments. This could be
|
|
* done by a generic wrapper.
|
|
*/
|
|
long sys32_lseek(unsigned int fd, int offset, unsigned int whence)
|
|
{
|
|
return sys_lseek(fd, offset, whence);
|
|
}
|
|
|
|
long sys32_kill(int pid, int sig)
|
|
{
|
|
return sys_kill(pid, sig);
|
|
}
|
|
|
|
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;
|
|
}
|
|
|
|
long sys32_lookup_dcookie(u32 addr_low, u32 addr_high,
|
|
char __user *buf, size_t len)
|
|
{
|
|
return sys_lookup_dcookie(((u64)addr_high << 32) | addr_low, buf, len);
|
|
}
|
|
|
|
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);
|
|
}
|