/*
* sys_ia32.c: Conversion between 32bit and 64bit native syscalls. Derived from sys_sparc32.c.
*
* 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) 2000-2003 Hewlett-Packard Co
* David Mosberger-Tang <davidm@hpl.hp.com>
*
* These routines maintain argument size conversion between 32bit and 64bit
* environment.
*/
#include <linux/config.h>
#include <linux/kernel.h>
#include <linux/syscalls.h>
#include <linux/sysctl.h>
#include <linux/sched.h>
#include <linux/fs.h>
#include <linux/file.h>
#include <linux/signal.h>
#include <linux/resource.h>
#include <linux/times.h>
#include <linux/utsname.h>
#include <linux/timex.h>
#include <linux/smp.h>
#include <linux/smp_lock.h>
#include <linux/sem.h>
#include <linux/msg.h>
#include <linux/mm.h>
#include <linux/shm.h>
#include <linux/slab.h>
#include <linux/uio.h>
#include <linux/nfs_fs.h>
#include <linux/quota.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/eventpoll.h>
#include <linux/personality.h>
#include <linux/ptrace.h>
#include <linux/stat.h>
#include <linux/ipc.h>
#include <linux/compat.h>
#include <linux/vfs.h>
#include <asm/intrinsics.h>
#include <asm/semaphore.h>
#include <asm/types.h>
#include <asm/uaccess.h>
#include <asm/unistd.h>
#include "ia32priv.h"
#include <net/scm.h>
#include <net/sock.h>
#define DEBUG 0
#if DEBUG
# define DBG(fmt...) printk(KERN_DEBUG fmt)
#else
# define DBG(fmt...)
#endif
#define A(__x) ((unsigned long)(__x))
#define AA(__x) ((unsigned long)(__x))
#define ROUND_UP(x,a) ((__typeof__(x))(((unsigned long)(x) + ((a) - 1)) & ~((a) - 1)))
#define NAME_OFFSET(de) ((int) ((de)->d_name - (char *) (de)))
#define OFFSET4K(a) ((a) & 0xfff)
#define PAGE_START(addr) ((addr) & PAGE_MASK)
#define MINSIGSTKSZ_IA32 2048
#define high2lowuid(uid) ((uid) > 65535 ? 65534 : (uid))
#define high2lowgid(gid) ((gid) > 65535 ? 65534 : (gid))
extern unsigned long arch_get_unmapped_area (struct file *, unsigned long, unsigned long,
unsigned long, unsigned long);
/*
* Anything that modifies or inspects ia32 user virtual memory must hold this semaphore
* while doing so.
*/
/* XXX make per-mm: */
static DECLARE_MUTEX(ia32_mmap_sem);
asmlinkage long
sys32_execve (char *name, compat_uptr_t __user *argv, compat_uptr_t __user *envp, struct pt_regs *regs)
{
long error;
char *filename;
unsigned long old_map_base, old_task_size, tssd;
filename = getname(name);
error = PTR_ERR(filename);
if (IS_ERR(filename))
return error;
old_map_base = current->thread.map_base;
old_task_size = current->thread.task_size;
tssd = ia64_get_kr(IA64_KR_TSSD);
/* we may be exec'ing a 64-bit process: reset map base, task-size, and io-base: */
current->thread.map_base = DEFAULT_MAP_BASE;
current->thread.task_size = DEFAULT_TASK_SIZE;
ia64_set_kr(IA64_KR_IO_BASE, current->thread.old_iob);
ia64_set_kr(IA64_KR_TSSD, current->thread.old_k1);
error = compat_do_execve(filename, argv, envp, regs);
putname(filename);
if (error < 0) {
/* oops, execve failed, switch back to old values... */
ia64_set_kr(IA64_KR_IO_BASE, IA32_IOBASE);
ia64_set_kr(IA64_KR_TSSD, tssd);
current->thread.map_base = old_map_base;
current->thread.task_size = old_task_size;
}
return error;
}
int cp_compat_stat(struct kstat *stat, struct compat_stat *ubuf)
{
int err;
if ((u64) stat->size > MAX_NON_LFS ||
!old_valid_dev(stat->dev) ||
!old_valid_dev(stat->rdev))
return -EOVERFLOW;
if (clear_user(ubuf, sizeof(*ubuf)))
return -EFAULT;
err = __put_user(old_encode_dev(stat->dev), &ubuf->st_dev);
err |= __put_user(stat->ino, &ubuf->st_ino);
err |= __put_user(stat->mode, &ubuf->st_mode);
err |= __put_user(stat->nlink, &ubuf->st_nlink);
err |= __put_user(high2lowuid(stat->uid), &ubuf->st_uid);
err |= __put_user(high2lowgid(stat->gid), &ubuf->st_gid);
err |= __put_user(old_encode_dev(stat->rdev), &ubuf->st_rdev);
err |= __put_user(stat->size, &ubuf->st_size);
err |= __put_user(stat->atime.tv_sec, &ubuf->st_atime);
err |= __put_user(stat->atime.tv_nsec, &ubuf->st_atime_nsec);
err |= __put_user(stat->mtime.tv_sec, &ubuf->st_mtime);
err |= __put_user(stat->mtime.tv_nsec, &ubuf->st_mtime_nsec);
err |= __put_user(stat->ctime.tv_sec, &ubuf->st_ctime);
err |= __put_user(stat->ctime.tv_nsec, &ubuf->st_ctime_nsec);
err |= __put_user(stat->blksize, &ubuf->st_blksize);
err |= __put_user(stat->blocks, &ubuf->st_blocks);
return err;
}
#if PAGE_SHIFT > IA32_PAGE_SHIFT
static int
get_page_prot (struct vm_area_struct *vma, unsigned long addr)
{
int prot = 0;
if (!vma || vma->vm_start > addr)
return 0;
if (vma->vm_flags & VM_READ)
prot |= PROT_READ;
if (vma->vm_flags & VM_WRITE)
prot |= PROT_WRITE;
if (vma->vm_flags & VM_EXEC)
prot |= PROT_EXEC;
return prot;
}
/*
* Map a subpage by creating an anonymous page that contains the union of the old page and
* the subpage.
*/
static unsigned long
mmap_subpage (struct file *file, unsigned long start, unsigned long end, int prot, int flags,
loff_t off)
{
void *page = NULL;
struct inode *inode;
unsigned long ret = 0;
struct vm_area_struct *vma = find_vma(current->mm, start);
int old_prot = get_page_prot(vma, start);
DBG("mmap_subpage(file=%p,start=0x%lx,end=0x%lx,prot=%x,flags=%x,off=0x%llx)\n",
file, start, end, prot, flags, off);
/* Optimize the case where the old mmap and the new mmap are both anonymous */
if ((old_prot & PROT_WRITE) && (flags & MAP_ANONYMOUS) && !vma->vm_file) {
if (clear_user((void *) start, end - start)) {
ret = -EFAULT;
goto out;
}
goto skip_mmap;
}
page = (void *) get_zeroed_page(GFP_KERNEL);
if (!page)
return -ENOMEM;
if (old_prot)
copy_from_user(page, (void *) PAGE_START(start), PAGE_SIZE);
down_write(¤t->mm->mmap_sem);
{
ret = do_mmap(0, PAGE_START(start), PAGE_SIZE, prot | PROT_WRITE,
flags | MAP_FIXED | MAP_ANONYMOUS, 0);
}
up_write(¤t->mm->mmap_sem);
if (IS_ERR((void *) ret))
goto out;
if (old_prot) {
/* copy back the old page contents. */
if (offset_in_page(start))
copy_to_user((void *) PAGE_START(start), page, offset_in_page(start));
if (offset_in_page(end))
copy_to_user((void *) end, page + offset_in_page(end),
PAGE_SIZE - offset_in_page(end));
}
if (!(flags & MAP_ANONYMOUS)) {
/* read the file contents */
inode = file->f_dentry->d_inode;
if (!inode->i_fop || !file->f_op->read
|| ((*file->f_op->read)(file, (char *) start, end - start, &off) < 0))
{
ret = -EINVAL;
goto out;
}
}
skip_mmap:
if (!(prot & PROT_WRITE))
ret = sys_mprotect(PAGE_START(start), PAGE_SIZE, prot | old_prot);
out:
if (page)
free_page((unsigned long) page);
return ret;
}
static unsigned long
emulate_mmap (struct file *file, unsigned long start, unsigned long len, int prot, int flags,
loff_t off)
{
unsigned long tmp, end, pend, pstart, ret, is_congruent, fudge = 0;
struct inode *inode;
loff_t poff;
end = start + len;
pstart = PAGE_START(start);
pend = PAGE_ALIGN(end);
if (flags & MAP_FIXED) {
if (start > pstart) {
if (flags & MAP_SHARED)
printk(KERN_INFO
"%s(%d): emulate_mmap() can't share head (addr=0x%lx)\n",
current->comm, current->pid, start);
ret = mmap_subpage(file, start, min(PAGE_ALIGN(start), end), prot, flags,
off);
if (IS_ERR((void *) ret))
return ret;
pstart += PAGE_SIZE;
if (pstart >= pend)
return start; /* done */
}
if (end < pend) {
if (flags & MAP_SHARED)
printk(KERN_INFO
"%s(%d): emulate_mmap() can't share tail (end=0x%lx)\n",
current->comm, current->pid, end);
ret = mmap_subpage(file, max(start, PAGE_START(end)), end, prot, flags,
(off + len) - offset_in_page(end));
if (IS_ERR((void *) ret))
return ret;
pend -= PAGE_SIZE;
if (pstart >= pend)
return start; /* done */
}
} else {
/*
* If a start address was specified, use it if the entire rounded out area
* is available.
*/
if (start && !pstart)
fudge = 1; /* handle case of mapping to range (0,PAGE_SIZE) */
tmp = arch_get_unmapped_area(file, pstart - fudge, pend - pstart, 0, flags);
if (tmp != pstart) {
pstart = tmp;
start = pstart + offset_in_page(off); /* make start congruent with off */
end = start + len;
pend = PAGE_ALIGN(end);
}
}
poff = off + (pstart - start); /* note: (pstart - start) may be negative */
is_congruent = (flags & MAP_ANONYMOUS) || (offset_in_page(poff) == 0);
if ((flags & MAP_SHARED) && !is_congruent)
printk(KERN_INFO "%s(%d): emulate_mmap() can't share contents of incongruent mmap "
"(addr=0x%lx,off=0x%llx)\n", current->comm, current->pid, start, off);
DBG("mmap_body: mapping [0x%lx-0x%lx) %s with poff 0x%llx\n", pstart, pend,
is_congruent ? "congruent" : "not congruent", poff);
down_write(¤t->mm->mmap_sem);
{
if (!(flags & MAP_ANONYMOUS) && is_congruent)
ret = do_mmap(file, pstart, pend - pstart, prot, flags | MAP_FIXED, poff);
else
ret = do_mmap(0, pstart, pend - pstart,
prot | ((flags & MAP_ANONYMOUS) ? 0 : PROT_WRITE),
flags | MAP_FIXED | MAP_ANONYMOUS, 0);
}
up_write(¤t->mm->mmap_sem);
if (IS_ERR((void *) ret))
return ret;
if (!is_congruent) {
/* read the file contents */
inode = file->f_dentry->d_inode;
if (!inode->i_fop || !file->f_op->read
|| ((*file->f_op->read)(file, (char *) pstart, pend - pstart, &poff) < 0))
{
sys_munmap(pstart, pend - pstart);
return -EINVAL;
}
if (!(prot & PROT_WRITE) && sys_mprotect(pstart, pend - pstart, prot) < 0)
return -EINVAL;
}
return start;
}
#endif /* PAGE_SHIFT > IA32_PAGE_SHIFT */
static inline unsigned int
get_prot32 (unsigned int prot)
{
if (prot & PROT_WRITE)
/* on x86, PROT_WRITE implies PROT_READ which implies PROT_EEC */
prot |= PROT_READ | PROT_WRITE | PROT_EXEC;
else if (prot & (PROT_READ | PROT_EXEC))
/* on x86, there is no distinction between PROT_READ and PROT_EXEC */
prot |= (PROT_READ | PROT_EXEC);
return prot;
}
unsigned long
ia32_do_mmap (struct file *file, unsigned long addr, unsigned long len, int prot, int flags,
loff_t offset)
{
DBG("ia32_do_mmap(file=%p,addr=0x%lx,len=0x%lx,prot=%x,flags=%x,offset=0x%llx)\n",
file, addr, len, prot, flags, offset);
if (file && (!file->f_op || !file->f_op->mmap))
return -ENODEV;
len = IA32_PAGE_ALIGN(len);
if (len == 0)
return addr;
if (len > IA32_PAGE_OFFSET || addr > IA32_PAGE_OFFSET - len)
{
if (flags & MAP_FIXED)
return -ENOMEM;
else
return -EINVAL;
}
if (OFFSET4K(offset))
return -EINVAL;
prot = get_prot32(prot);
#if PAGE_SHIFT > IA32_PAGE_SHIFT
down(&ia32_mmap_sem);
{
addr = emulate_mmap(file, addr, len, prot, flags, offset);
}
up(&ia32_mmap_sem);
#else
down_write(¤t->mm->mmap_sem);
{
addr = do_mmap(file, addr, len, prot, flags, offset);
}
up_write(¤t->mm->mmap_sem);
#endif
DBG("ia32_do_mmap: returning 0x%lx\n", addr);
return addr;
}
/*
* 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_struct {
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_struct *arg)
{
struct mmap_arg_struct a;
struct file *file = NULL;
unsigned long addr;
int flags;
if (copy_from_user(&a, arg, sizeof(a)))
return -EFAULT;
if (OFFSET4K(a.offset))
return -EINVAL;
flags = a.flags;
flags &= ~(MAP_EXECUTABLE | MAP_DENYWRITE);
if (!(flags & MAP_ANONYMOUS)) {
file = fget(a.fd);
if (!file)
return -EBADF;
}
addr = ia32_do_mmap(file, a.addr, a.len, a.prot, flags, a.offset);
if (file)
fput(file);
return addr;
}
asmlinkage long
sys32_mmap2 (unsigned int addr, unsigned int len, unsigned int prot, unsigned int flags,
unsigned int fd, unsigned int pgoff)
{
struct file *file = NULL;
unsigned long retval;
flags &= ~(MAP_EXECUTABLE | MAP_DENYWRITE);
if (!(flags & MAP_ANONYMOUS)) {
file = fget(fd);
if (!file)
return -EBADF;
}
retval = ia32_do_mmap(file, addr, len, prot, flags,
(unsigned long) pgoff << IA32_PAGE_SHIFT);
if (file)
fput(file);
return retval;
}
asmlinkage long
sys32_munmap (unsigned int start, unsigned int len)
{
unsigned int end = start + len;
long ret;
#if PAGE_SHIFT <= IA32_PAGE_SHIFT
ret = sys_munmap(start, end - start);
#else
if (start >= end)
return -EINVAL;
start = PAGE_ALIGN(start);
end = PAGE_START(end);
if (start >= end)
return 0;
down(&ia32_mmap_sem);
{
ret = sys_munmap(start, end - start);
}
up(&ia32_mmap_sem);
#endif
return ret;
}
#if PAGE_SHIFT > IA32_PAGE_SHIFT
/*
* When mprotect()ing a partial page, we set the permission to the union of the old
* settings and the new settings. In other words, it's only possible to make access to a
* partial page less restrictive.
*/
static long
mprotect_subpage (unsigned long address, int new_prot)
{
int old_prot;
struct vm_area_struct *vma;
if (new_prot == PROT_NONE)
return 0; /* optimize case where nothing changes... */
vma = find_vma(current->mm, address);
old_prot = get_page_prot(vma, address);
return sys_mprotect(address, PAGE_SIZE, new_prot | old_prot);
}
#endif /* PAGE_SHIFT > IA32_PAGE_SHIFT */
asmlinkage long
sys32_mprotect (unsigned int start, unsigned int len, int prot)
{
unsigned long end = start + len;
#if PAGE_SHIFT > IA32_PAGE_SHIFT
long retval = 0;
#endif
prot = get_prot32(prot);
#if PAGE_SHIFT <= IA32_PAGE_SHIFT
return sys_mprotect(start, end - start, prot);
#else
if (OFFSET4K(start))
return -EINVAL;
end = IA32_PAGE_ALIGN(end);
if (end < start)
return -EINVAL;
down(&ia32_mmap_sem);
{
if (offset_in_page(start)) {
/* start address is 4KB aligned but not page aligned. */
retval = mprotect_subpage(PAGE_START(start), prot);
if (retval < 0)
goto out;
start = PAGE_ALIGN(start);
if (start >= end)
goto out; /* retval is already zero... */
}
if (offset_in_page(end)) {
/* end address is 4KB aligned but not page aligned. */
retval = mprotect_subpage(PAGE_START(end), prot);
if (retval < 0)
goto out;
end = PAGE_START(end);
}
retval = sys_mprotect(start, end - start, prot);
}
out:
up(&ia32_mmap_sem);
return retval;
#endif
}
asmlinkage long
sys32_pipe (int *fd)
{
int retval;
int fds[2];
retval = do_pipe(fds);
if (retval)
goto out;
if (copy_to_user(fd, fds, sizeof(fds)))
retval = -EFAULT;
out:
return retval;
}
static inline long
get_tv32 (struct timeval *o, struct compat_timeval *i)
{
return (!access_ok(VERIFY_READ, i, sizeof(*i)) ||
(__get_user(o->tv_sec, &i->tv_sec) | __get_user(o->tv_usec, &i->tv_usec)));
}
static inline long
put_tv32 (struct compat_timeval *o, struct timeval *i)
{
return (!access_ok(VERIFY_WRITE, o, sizeof(*o)) ||
(__put_user(i->tv_sec, &o->tv_sec) | __put_user(i->tv_usec, &o->tv_usec)));
}
asmlinkage unsigned long
sys32_alarm (unsigned int seconds)
{
struct itimerval it_new, it_old;
unsigned int oldalarm;
it_new.it_interval.tv_sec = it_new.it_interval.tv_usec = 0;
it_new.it_value.tv_sec = seconds;
it_new.it_value.tv_usec = 0;
do_setitimer(ITIMER_REAL, &it_new, &it_old);
oldalarm = it_old.it_value.tv_sec;
/* ehhh.. We can't return 0 if we have an alarm pending.. */
/* And we'd better return too much than too little anyway */
if (it_old.it_value.tv_usec)
oldalarm++;
return oldalarm;
}
/* Translations due to time_t size differences. Which affects all
sorts of things, like timeval and itimerval. */
extern struct timezone sys_tz;
asmlinkage long
sys32_gettimeofday (struct compat_timeval *tv, struct timezone *tz)
{
if (tv) {
struct timeval ktv;
do_gettimeofday(&ktv);
if (put_tv32(tv, &ktv))
return -EFAULT;
}
if (tz) {
if (copy_to_user(tz, &sys_tz, sizeof(sys_tz)))
return -EFAULT;
}
return 0;
}
asmlinkage long
sys32_settimeofday (struct compat_timeval *tv, struct timezone *tz)
{
struct timeval ktv;
struct timespec kts;
struct timezone ktz;
if (tv) {
if (get_tv32(&ktv, tv))
return -EFAULT;
kts.tv_sec = ktv.tv_sec;
kts.tv_nsec = ktv.tv_usec * 1000;
}
if (tz) {
if (copy_from_user(&ktz, tz, sizeof(ktz)))
return -EFAULT;
}
return do_sys_settimeofday(tv ? &kts : NULL, tz ? &ktz : NULL);
}
struct getdents32_callback {
struct compat_dirent * current_dir;
struct compat_dirent * previous;
int count;
int error;
};
struct readdir32_callback {
struct old_linux32_dirent * dirent;
int count;
};
static int
filldir32 (void *__buf, const char *name, int namlen, loff_t offset, ino_t ino,
unsigned int d_type)
{
struct compat_dirent * dirent;
struct getdents32_callback * buf = (struct getdents32_callback *) __buf;
int reclen = ROUND_UP(NAME_OFFSET(dirent) + namlen + 1, 4);
buf->error = -EINVAL; /* only used if we fail.. */
if (reclen > buf->count)
return -EINVAL;
buf->error = -EFAULT; /* only used if we fail.. */
dirent = buf->previous;
if (dirent)
if (put_user(offset, &dirent->d_off))
return -EFAULT;
dirent = buf->current_dir;
buf->previous = dirent;
if (put_user(ino, &dirent->d_ino)
|| put_user(reclen, &dirent->d_reclen)
|| copy_to_user(dirent->d_name, name, namlen)
|| put_user(0, dirent->d_name + namlen))
return -EFAULT;
dirent = (struct compat_dirent *) ((char *) dirent + reclen);
buf->current_dir = dirent;
buf->count -= reclen;
return 0;
}
asmlinkage long
sys32_getdents (unsigned int fd, struct compat_dirent *dirent, unsigned int count)
{
struct file * file;
struct compat_dirent * lastdirent;
struct getdents32_callback buf;
int error;
error = -EBADF;
file = fget(fd);
if (!file)
goto out;
buf.current_dir = dirent;
buf.previous = NULL;
buf.count = count;
buf.error = 0;
error = vfs_readdir(file, filldir32, &buf);
if (error < 0)
goto out_putf;
error = buf.error;
lastdirent = buf.previous;
if (lastdirent) {
error = -EINVAL;
if (put_user(file->f_pos, &lastdirent->d_off))
goto out_putf;
error = count - buf.count;
}
out_putf:
fput(file);
out:
return error;
}
static int
fillonedir32 (void * __buf, const char * name, int namlen, loff_t offset, ino_t ino,
unsigned int d_type)
{
struct readdir32_callback * buf = (struct readdir32_callback *) __buf;
struct old_linux32_dirent * dirent;
if (buf->count)
return -EINVAL;
buf->count++;
dirent = buf->dirent;
if (put_user(ino, &dirent->d_ino)
|| put_user(offset, &dirent->d_offset)
|| put_user(namlen, &dirent->d_namlen)
|| copy_to_user(dirent->d_name, name, namlen)
|| put_user(0, dirent->d_name + namlen))
return -EFAULT;
return 0;
}
asmlinkage long
sys32_readdir (unsigned int fd, void *dirent, unsigned int count)
{
int error;
struct file * file;
struct readdir32_callback buf;
error = -EBADF;
file = fget(fd);
if (!file)
goto out;
buf.count = 0;
buf.dirent = dirent;
error = vfs_readdir(file, fillonedir32, &buf);
if (error >= 0)
error = buf.count;
fput(file);
out:
return error;
}
struct sel_arg_struct {
unsigned int n;
unsigned int inp;
unsigned int outp;
unsigned int exp;
unsigned int tvp;
};
asmlinkage long
sys32_old_select (struct sel_arg_struct *arg)
{
struct sel_arg_struct a;
if (copy_from_user(&a, arg, sizeof(a)))
return -EFAULT;
return compat_sys_select(a.n, compat_ptr(a.inp), compat_ptr(a.outp),
compat_ptr(a.exp), compat_ptr(a.tvp));
}
#define SEMOP 1
#define SEMGET 2
#define SEMCTL 3
#define SEMTIMEDOP 4
#define MSGSND 11
#define MSGRCV 12
#define MSGGET 13
#define MSGCTL 14
#define SHMAT 21
#define SHMDT 22
#define SHMGET 23
#define SHMCTL 24
asmlinkage long
sys32_ipc(u32 call, int first, int second, int third, u32 ptr, u32 fifth)
{
int version;
version = call >> 16; /* hack for backward compatibility */
call &= 0xffff;
switch (call) {
case SEMTIMEDOP:
if (fifth)
return compat_sys_semtimedop(first, compat_ptr(ptr),
second, compat_ptr(fifth));
/* else fall through for normal semop() */
case SEMOP:
/* struct sembuf is the same on 32 and 64bit :)) */
return sys_semtimedop(first, compat_ptr(ptr), second,
NULL);
case SEMGET:
return sys_semget(first, second, third);
case SEMCTL:
return compat_sys_semctl(first, second, third, compat_ptr(ptr));
case MSGSND:
return compat_sys_msgsnd(first, second, third, compat_ptr(ptr));
case MSGRCV:
return compat_sys_msgrcv(first, second, fifth, third, version, compat_ptr(ptr));
case MSGGET:
return sys_msgget((key_t) first, second);
case MSGCTL:
return compat_sys_msgctl(first, second, compat_ptr(ptr));
case SHMAT:
return compat_sys_shmat(first, second, third, version, compat_ptr(ptr));
break;
case SHMDT:
return sys_shmdt(compat_ptr(ptr));
case SHMGET:
return sys_shmget(first, second, third);
case SHMCTL:
return compat_sys_shmctl(first, second, compat_ptr(ptr));
default:
return -ENOSYS;
}
return -EINVAL;
}
/*
* sys_time() can be implemented in user-level using
* sys_gettimeofday(). IA64 did this but i386 Linux did not
* so we have to implement this system call here.
*/
asmlinkage long
sys32_time (int *tloc)
{
int i;
struct timeval tv;
do_gettimeofday(&tv);
i = tv.tv_sec;
if (tloc) {
if (put_user(i, tloc))
i = -EFAULT;
}
return i;
}
asmlinkage long
compat_sys_wait4 (compat_pid_t pid, compat_uint_t * stat_addr, int options,
struct compat_rusage *ru);
asmlinkage long
sys32_waitpid (int pid, unsigned int *stat_addr, int options)
{
return compat_sys_wait4(pid, stat_addr, options, NULL);
}
static unsigned int
ia32_peek (struct pt_regs *regs, struct task_struct *child, unsigned long addr, unsigned int *val)
{
size_t copied;
unsigned int ret;
copied = access_process_vm(child, addr, val, sizeof(*val), 0);
return (copied != sizeof(ret)) ? -EIO : 0;
}
static unsigned int
ia32_poke (struct pt_regs *regs, struct task_struct *child, unsigned long addr, unsigned int val)
{
if (access_process_vm(child, addr, &val, sizeof(val), 1) != sizeof(val))
return -EIO;
return 0;
}
/*
* The order in which registers are stored in the ptrace regs structure
*/
#define PT_EBX 0
#define PT_ECX 1
#define PT_EDX 2
#define PT_ESI 3
#define PT_EDI 4
#define PT_EBP 5
#define PT_EAX 6
#define PT_DS 7
#define PT_ES 8
#define PT_FS 9
#define PT_GS 10
#define PT_ORIG_EAX 11
#define PT_EIP 12
#define PT_CS 13
#define PT_EFL 14
#define PT_UESP 15
#define PT_SS 16
static unsigned int
getreg (struct task_struct *child, int regno)
{
struct pt_regs *child_regs;
child_regs = ia64_task_regs(child);
switch (regno / sizeof(int)) {
case PT_EBX: return child_regs->r11;
case PT_ECX: return child_regs->r9;
case PT_EDX: return child_regs->r10;
case PT_ESI: return child_regs->r14;
case PT_EDI: return child_regs->r15;
case PT_EBP: return child_regs->r13;
case PT_EAX: return child_regs->r8;
case PT_ORIG_EAX: return child_regs->r1; /* see dispatch_to_ia32_handler() */
case PT_EIP: return child_regs->cr_iip;
case PT_UESP: return child_regs->r12;
case PT_EFL: return child->thread.eflag;
case PT_DS: case PT_ES: case PT_FS: case PT_GS: case PT_SS:
return __USER_DS;
case PT_CS: return __USER_CS;
default:
printk(KERN_ERR "ia32.getreg(): unknown register %d\n", regno);
break;
}
return 0;
}
static void
putreg (struct task_struct *child, int regno, unsigned int value)
{
struct pt_regs *child_regs;
child_regs = ia64_task_regs(child);
switch (regno / sizeof(int)) {
case PT_EBX: child_regs->r11 = value; break;
case PT_ECX: child_regs->r9 = value; break;
case PT_EDX: child_regs->r10 = value; break;
case PT_ESI: child_regs->r14 = value; break;
case PT_EDI: child_regs->r15 = value; break;
case PT_EBP: child_regs->r13 = value; break;
case PT_EAX: child_regs->r8 = value; break;
case PT_ORIG_EAX: child_regs->r1 = value; break;
case PT_EIP: child_regs->cr_iip = value; break;
case PT_UESP: child_regs->r12 = value; break;
case PT_EFL: child->thread.eflag = value; break;
case PT_DS: case PT_ES: case PT_FS: case PT_GS: case PT_SS:
if (value != __USER_DS)
printk(KERN_ERR
"ia32.putreg: attempt to set invalid segment register %d = %x\n",
regno, value);
break;
case PT_CS:
if (value != __USER_CS)
printk(KERN_ERR
"ia32.putreg: attempt to to set invalid segment register %d = %x\n",
regno, value);
break;
default:
printk(KERN_ERR "ia32.putreg: unknown register %d\n", regno);
break;
}
}
static void
put_fpreg (int regno, struct _fpreg_ia32 *reg, struct pt_regs *ptp, struct switch_stack *swp,
int tos)
{
struct _fpreg_ia32 *f;
char buf[32];
f = (struct _fpreg_ia32 *)(((unsigned long)buf + 15) & ~15);
if ((regno += tos) >= 8)
regno -= 8;
switch (regno) {
case 0:
ia64f2ia32f(f, &ptp->f8);
break;
case 1:
ia64f2ia32f(f, &ptp->f9);
break;
case 2:
ia64f2ia32f(f, &ptp->f10);
break;
case 3:
ia64f2ia32f(f, &ptp->f11);
break;
case 4:
case 5:
case 6:
case 7:
ia64f2ia32f(f, &swp->f12 + (regno - 4));
break;
}
copy_to_user(reg, f, sizeof(*reg));
}
static void
get_fpreg (int regno, struct _fpreg_ia32 *reg, struct pt_regs *ptp, struct switch_stack *swp,
int tos)
{
if ((regno += tos) >= 8)
regno -= 8;
switch (regno) {
case 0:
copy_from_user(&ptp->f8, reg, sizeof(*reg));
break;
case 1:
copy_from_user(&ptp->f9, reg, sizeof(*reg));
break;
case 2:
copy_from_user(&ptp->f10, reg, sizeof(*reg));
break;
case 3:
copy_from_user(&ptp->f11, reg, sizeof(*reg));
break;
case 4:
case 5:
case 6:
case 7:
copy_from_user(&swp->f12 + (regno - 4), reg, sizeof(*reg));
break;
}
return;
}
int
save_ia32_fpstate (struct task_struct *tsk, struct ia32_user_i387_struct *save)
{
struct switch_stack *swp;
struct pt_regs *ptp;
int i, tos;
if (!access_ok(VERIFY_WRITE, save, sizeof(*save)))
return -EFAULT;
__put_user(tsk->thread.fcr & 0xffff, &save->cwd);
__put_user(tsk->thread.fsr & 0xffff, &save->swd);
__put_user((tsk->thread.fsr>>16) & 0xffff, &save->twd);
__put_user(tsk->thread.fir, &save->fip);
__put_user((tsk->thread.fir>>32) & 0xffff, &save->fcs);
__put_user(tsk->thread.fdr, &save->foo);
__put_user((tsk->thread.fdr>>32) & 0xffff, &save->fos);
/*
* Stack frames start with 16-bytes of temp space
*/
swp = (struct switch_stack *)(tsk->thread.ksp + 16);
ptp = ia64_task_regs(tsk);
tos = (tsk->thread.fsr >> 11) & 7;
for (i = 0; i < 8; i++)
put_fpreg(i, &save->st_space[i], ptp, swp, tos);
return 0;
}
static int
restore_ia32_fpstate (struct task_struct *tsk, struct ia32_user_i387_struct *save)
{
struct switch_stack *swp;
struct pt_regs *ptp;
int i, tos;
unsigned int fsrlo, fsrhi, num32;
if (!access_ok(VERIFY_READ, save, sizeof(*save)))
return(-EFAULT);
__get_user(num32, (unsigned int *)&save->cwd);
tsk->thread.fcr = (tsk->thread.fcr & (~0x1f3f)) | (num32 & 0x1f3f);
__get_user(fsrlo, (unsigned int *)&save->swd);
__get_user(fsrhi, (unsigned int *)&save->twd);
num32 = (fsrhi << 16) | fsrlo;
tsk->thread.fsr = (tsk->thread.fsr & (~0xffffffff)) | num32;
__get_user(num32, (unsigned int *)&save->fip);
tsk->thread.fir = (tsk->thread.fir & (~0xffffffff)) | num32;
__get_user(num32, (unsigned int *)&save->foo);
tsk->thread.fdr = (tsk->thread.fdr & (~0xffffffff)) | num32;
/*
* Stack frames start with 16-bytes of temp space
*/
swp = (struct switch_stack *)(tsk->thread.ksp + 16);
ptp = ia64_task_regs(tsk);
tos = (tsk->thread.fsr >> 11) & 7;
for (i = 0; i < 8; i++)
get_fpreg(i, &save->st_space[i], ptp, swp, tos);
return 0;
}
int
save_ia32_fpxstate (struct task_struct *tsk, struct ia32_user_fxsr_struct *save)
{
struct switch_stack *swp;
struct pt_regs *ptp;
int i, tos;
unsigned long mxcsr=0;
unsigned long num128[2];
if (!access_ok(VERIFY_WRITE, save, sizeof(*save)))
return -EFAULT;
__put_user(tsk->thread.fcr & 0xffff, &save->cwd);
__put_user(tsk->thread.fsr & 0xffff, &save->swd);
__put_user((tsk->thread.fsr>>16) & 0xffff, &save->twd);
__put_user(tsk->thread.fir, &save->fip);
__put_user((tsk->thread.fir>>32) & 0xffff, &save->fcs);
__put_user(tsk->thread.fdr, &save->foo);
__put_user((tsk->thread.fdr>>32) & 0xffff, &save->fos);
/*
* Stack frames start with 16-bytes of temp space
*/
swp = (struct switch_stack *)(tsk->thread.ksp + 16);
ptp = ia64_task_regs(tsk);
tos = (tsk->thread.fsr >> 11) & 7;
for (i = 0; i < 8; i++)
put_fpreg(i, (struct _fpreg_ia32 *)&save->st_space[4*i], ptp, swp, tos);
mxcsr = ((tsk->thread.fcr>>32) & 0xff80) | ((tsk->thread.fsr>>32) & 0x3f);
__put_user(mxcsr & 0xffff, &save->mxcsr);
for (i = 0; i < 8; i++) {
memcpy(&(num128[0]), &(swp->f16) + i*2, sizeof(unsigned long));
memcpy(&(num128[1]), &(swp->f17) + i*2, sizeof(unsigned long));
copy_to_user(&save->xmm_space[0] + 4*i, num128, sizeof(struct _xmmreg_ia32));
}
return 0;
}
static int
restore_ia32_fpxstate (struct task_struct *tsk, struct ia32_user_fxsr_struct *save)
{
struct switch_stack *swp;
struct pt_regs *ptp;
int i, tos;
unsigned int fsrlo, fsrhi, num32;
int mxcsr;
unsigned long num64;
unsigned long num128[2];
if (!access_ok(VERIFY_READ, save, sizeof(*save)))
return(-EFAULT);
__get_user(num32, (unsigned int *)&save->cwd);
tsk->thread.fcr = (tsk->thread.fcr & (~0x1f3f)) | (num32 & 0x1f3f);
__get_user(fsrlo, (unsigned int *)&save->swd);
__get_user(fsrhi, (unsigned int *)&save->twd);
num32 = (fsrhi << 16) | fsrlo;
tsk->thread.fsr = (tsk->thread.fsr & (~0xffffffff)) | num32;
__get_user(num32, (unsigned int *)&save->fip);
tsk->thread.fir = (tsk->thread.fir & (~0xffffffff)) | num32;
__get_user(num32, (unsigned int *)&save->foo);
tsk->thread.fdr = (tsk->thread.fdr & (~0xffffffff)) | num32;
/*
* Stack frames start with 16-bytes of temp space
*/
swp = (struct switch_stack *)(tsk->thread.ksp + 16);
ptp = ia64_task_regs(tsk);
tos = (tsk->thread.fsr >> 11) & 7;
for (i = 0; i < 8; i++)
get_fpreg(i, (struct _fpreg_ia32 *)&save->st_space[4*i], ptp, swp, tos);
__get_user(mxcsr, (unsigned int *)&save->mxcsr);
num64 = mxcsr & 0xff10;
tsk->thread.fcr = (tsk->thread.fcr & (~0xff1000000000)) | (num64<<32);
num64 = mxcsr & 0x3f;
tsk->thread.fsr = (tsk->thread.fsr & (~0x3f00000000)) | (num64<<32);
for (i = 0; i < 8; i++) {
copy_from_user(num128, &save->xmm_space[0] + 4*i, sizeof(struct _xmmreg_ia32));
memcpy(&(swp->f16) + i*2, &(num128[0]), sizeof(unsigned long));
memcpy(&(swp->f17) + i*2, &(num128[1]), sizeof(unsigned long));
}
return 0;
}
/*
* Note that the IA32 version of `ptrace' calls the IA64 routine for
* many of the requests. This will only work for requests that do
* not need access to the calling processes `pt_regs' which is located
* at the address of `stack'. Once we call the IA64 `sys_ptrace' then
* the address of `stack' will not be the address of the `pt_regs'.
*/
asmlinkage long
sys32_ptrace (int request, pid_t pid, unsigned int addr, unsigned int data,
long arg4, long arg5, long arg6, long arg7, long stack)
{
struct pt_regs *regs = (struct pt_regs *) &stack;
struct task_struct *child;
unsigned int value, tmp;
long i, ret;
lock_kernel();
if (request == PTRACE_TRACEME) {
ret = sys_ptrace(request, pid, addr, data, arg4, arg5, arg6, arg7, stack);
goto out;
}
ret = -ESRCH;
read_lock(&tasklist_lock);
child = find_task_by_pid(pid);
if (child)
get_task_struct(child);
read_unlock(&tasklist_lock);
if (!child)
goto out;
ret = -EPERM;
if (pid == 1) /* no messing around with init! */
goto out_tsk;
if (request == PTRACE_ATTACH) {
ret = sys_ptrace(request, pid, addr, data, arg4, arg5, arg6, arg7, stack);
goto out_tsk;
}
ret = ptrace_check_attach(child, request == PTRACE_KILL);
if (ret < 0)
goto out_tsk;
switch (request) {
case PTRACE_PEEKTEXT:
case PTRACE_PEEKDATA: /* read word at location addr */
ret = ia32_peek(regs, child, addr, &value);
if (ret == 0)
ret = put_user(value, (unsigned int *) A(data));
else
ret = -EIO;
goto out_tsk;
case PTRACE_POKETEXT:
case PTRACE_POKEDATA: /* write the word at location addr */
ret = ia32_poke(regs, child, addr, data);
goto out_tsk;
case PTRACE_PEEKUSR: /* read word at addr in USER area */
ret = -EIO;
if ((addr & 3) || addr > 17*sizeof(int))
break;
tmp = getreg(child, addr);
if (!put_user(tmp, (unsigned int *) A(data)))
ret = 0;
break;
case PTRACE_POKEUSR: /* write word at addr in USER area */
ret = -EIO;
if ((addr & 3) || addr > 17*sizeof(int))
break;
putreg(child, addr, data);
ret = 0;
break;
case IA32_PTRACE_GETREGS:
if (!access_ok(VERIFY_WRITE, (int *) A(data), 17*sizeof(int))) {
ret = -EIO;
break;
}
for (i = 0; i < (int) (17*sizeof(int)); i += sizeof(int) ) {
put_user(getreg(child, i), (unsigned int *) A(data));
data += sizeof(int);
}
ret = 0;
break;
case IA32_PTRACE_SETREGS:
if (!access_ok(VERIFY_READ, (int *) A(data), 17*sizeof(int))) {
ret = -EIO;
break;
}
for (i = 0; i < (int) (17*sizeof(int)); i += sizeof(int) ) {
get_user(tmp, (unsigned int *) A(data));
putreg(child, i, tmp);
data += sizeof(int);
}
ret = 0;
break;
case IA32_PTRACE_GETFPREGS:
ret = save_ia32_fpstate(child, (struct ia32_user_i387_struct *) A(data));
break;
case IA32_PTRACE_GETFPXREGS:
ret = save_ia32_fpxstate(child, (struct ia32_user_fxsr_struct *) A(data));
break;
case IA32_PTRACE_SETFPREGS:
ret = restore_ia32_fpstate(child, (struct ia32_user_i387_struct *) A(data));
break;
case IA32_PTRACE_SETFPXREGS:
ret = restore_ia32_fpxstate(child, (struct ia32_user_fxsr_struct *) A(data));
break;
case PTRACE_SYSCALL: /* continue, stop after next syscall */
case PTRACE_CONT: /* restart after signal. */
case PTRACE_KILL:
case PTRACE_SINGLESTEP: /* execute chile for one instruction */
case PTRACE_DETACH: /* detach a process */
ret = sys_ptrace(request, pid, addr, data, arg4, arg5, arg6, arg7, stack);
break;
default:
ret = ptrace_request(child, request, addr, data);
break;
}
out_tsk:
put_task_struct(child);
out:
unlock_kernel();
return ret;
}
/*
* The IA64 maps 4 I/O ports for each 4K page
*/
#define IOLEN ((65536 / 4) * 4096)
asmlinkage long
sys32_iopl (int level)
{
extern unsigned long ia64_iobase;
int fd;
struct file * file;
unsigned int old;
unsigned long addr;
mm_segment_t old_fs = get_fs ();
if (level != 3)
return(-EINVAL);
/* Trying to gain more privileges? */
old = ia64_getreg(_IA64_REG_AR_EFLAG);
if ((unsigned int) level > ((old >> 12) & 3)) {
if (!capable(CAP_SYS_RAWIO))
return -EPERM;
}
set_fs(KERNEL_DS);
fd = sys_open("/dev/mem", O_SYNC | O_RDWR, 0);
set_fs(old_fs);
if (fd < 0)
return fd;
file = fget(fd);
if (file == NULL) {
sys_close(fd);
return(-EFAULT);
}
down_write(¤t->mm->mmap_sem);
addr = do_mmap_pgoff(file, IA32_IOBASE,
IOLEN, PROT_READ|PROT_WRITE, MAP_SHARED,
(ia64_iobase & ~PAGE_OFFSET) >> PAGE_SHIFT);
up_write(¤t->mm->mmap_sem);
if (addr >= 0) {
old = (old & ~0x3000) | (level << 12);
ia64_setreg(_IA64_REG_AR_EFLAG, old);
}
fput(file);
sys_close(fd);
return 0;
}
asmlinkage long
sys32_ioperm (unsigned int from, unsigned int num, int on)
{
/*
* Since IA64 doesn't have permission bits we'd have to go to
* a lot of trouble to simulate them in software. There's
* no point, only trusted programs can make this call so we'll
* just turn it into an iopl call and let the process have
* access to all I/O ports.
*
* XXX proper ioperm() support should be emulated by
* manipulating the page protections...
*/
return sys32_iopl(3);
}
typedef struct {
unsigned int ss_sp;
unsigned int ss_flags;
unsigned int ss_size;
} ia32_stack_t;
asmlinkage long
sys32_sigaltstack (ia32_stack_t *uss32, ia32_stack_t *uoss32,
long arg2, long arg3, long arg4, long arg5, long arg6, long arg7, long stack)
{
struct pt_regs *pt = (struct pt_regs *) &stack;
stack_t uss, uoss;
ia32_stack_t buf32;
int ret;
mm_segment_t old_fs = get_fs();
if (uss32)
if (copy_from_user(&buf32, uss32, sizeof(ia32_stack_t)))
return -EFAULT;
uss.ss_sp = (void *) (long) buf32.ss_sp;
uss.ss_flags = buf32.ss_flags;
/* MINSIGSTKSZ is different for ia32 vs ia64. We lie here to pass the
check and set it to the user requested value later */
if ((buf32.ss_flags != SS_DISABLE) && (buf32.ss_size < MINSIGSTKSZ_IA32)) {
ret = -ENOMEM;
goto out;
}
uss.ss_size = MINSIGSTKSZ;
set_fs(KERNEL_DS);
ret = do_sigaltstack(uss32 ? &uss : NULL, &uoss, pt->r12);
current->sas_ss_size = buf32.ss_size;
set_fs(old_fs);
out:
if (ret < 0)
return(ret);
if (uoss32) {
buf32.ss_sp = (long) uoss.ss_sp;
buf32.ss_flags = uoss.ss_flags;
buf32.ss_size = uoss.ss_size;
if (copy_to_user(uoss32, &buf32, sizeof(ia32_stack_t)))
return -EFAULT;
}
return ret;
}
asmlinkage int
sys32_pause (void)
{
current->state = TASK_INTERRUPTIBLE;
schedule();
return -ERESTARTNOHAND;
}
asmlinkage int
sys32_msync (unsigned int start, unsigned int len, int flags)
{
unsigned int addr;
if (OFFSET4K(start))
return -EINVAL;
addr = PAGE_START(start);
return sys_msync(addr, len + (start - addr), flags);
}
struct sysctl32 {
unsigned int name;
int nlen;
unsigned int oldval;
unsigned int oldlenp;
unsigned int newval;
unsigned int newlen;
unsigned int __unused[4];
};
asmlinkage long
sys32_sysctl (struct sysctl32 *args)
{
#ifdef CONFIG_SYSCTL
struct sysctl32 a32;
mm_segment_t old_fs = get_fs ();
void *oldvalp, *newvalp;
size_t oldlen;
int *namep;
long ret;
if (copy_from_user(&a32, args, sizeof(a32)))
return -EFAULT;
/*
* We need to pre-validate these because we have to disable address checking
* before calling do_sysctl() because of OLDLEN but we can't run the risk of the
* user specifying bad addresses here. Well, since we're dealing with 32 bit
* addresses, we KNOW that access_ok() will always succeed, so this is an
* expensive NOP, but so what...
*/
namep = (int *) A(a32.name);
oldvalp = (void *) A(a32.oldval);
newvalp = (void *) A(a32.newval);
if ((oldvalp && get_user(oldlen, (int *) A(a32.oldlenp)))
|| !access_ok(VERIFY_WRITE, namep, 0)
|| !access_ok(VERIFY_WRITE, oldvalp, 0)
|| !access_ok(VERIFY_WRITE, newvalp, 0))
return -EFAULT;
set_fs(KERNEL_DS);
lock_kernel();
ret = do_sysctl(namep, a32.nlen, oldvalp, &oldlen, newvalp, (size_t) a32.newlen);
unlock_kernel();
set_fs(old_fs);
if (oldvalp && put_user (oldlen, (int *) A(a32.oldlenp)))
return -EFAULT;
return ret;
#else
return -ENOSYS;
#endif
}
asmlinkage long
sys32_newuname (struct new_utsname *name)
{
int ret = sys_newuname(name);
if (!ret)
if (copy_to_user(name->machine, "i686\0\0\0", 8))
ret = -EFAULT;
return ret;
}
asmlinkage long
sys32_getresuid16 (u16 *ruid, u16 *euid, u16 *suid)
{
uid_t a, b, c;
int ret;
mm_segment_t old_fs = get_fs();
set_fs(KERNEL_DS);
ret = sys_getresuid(&a, &b, &c);
set_fs(old_fs);
if (put_user(a, ruid) || put_user(b, euid) || put_user(c, suid))
return -EFAULT;
return ret;
}
asmlinkage long
sys32_getresgid16 (u16 *rgid, u16 *egid, u16 *sgid)
{
gid_t a, b, c;
int ret;
mm_segment_t old_fs = get_fs();
set_fs(KERNEL_DS);
ret = sys_getresgid(&a, &b, &c);
set_fs(old_fs);
if (ret)
return ret;
return put_user(a, rgid) | put_user(b, egid) | put_user(c, sgid);
}
asmlinkage long
sys32_lseek (unsigned int fd, int offset, unsigned int whence)
{
/* Sign-extension of "offset" is important here... */
return sys_lseek(fd, offset, whence);
}
static int
groups16_to_user(short *grouplist, struct group_info *group_info)
{
int i;
short group;
for (i = 0; i < group_info->ngroups; i++) {
group = (short)GROUP_AT(group_info, i);
if (put_user(group, grouplist+i))
return -EFAULT;
}
return 0;
}
static int
groups16_from_user(struct group_info *group_info, short *grouplist)
{
int i;
short group;
for (i = 0; i < group_info->ngroups; i++) {
if (get_user(group, grouplist+i))
return -EFAULT;
GROUP_AT(group_info, i) = (gid_t)group;
}
return 0;
}
asmlinkage long
sys32_getgroups16 (int gidsetsize, short *grouplist)
{
int i;
if (gidsetsize < 0)
return -EINVAL;
get_group_info(current->group_info);
i = current->group_info->ngroups;
if (gidsetsize) {
if (i > gidsetsize) {
i = -EINVAL;
goto out;
}
if (groups16_to_user(grouplist, current->group_info)) {
i = -EFAULT;
goto out;
}
}
out:
put_group_info(current->group_info);
return i;
}
asmlinkage long
sys32_setgroups16 (int gidsetsize, short *grouplist)
{
struct group_info *group_info;
int retval;
if (!capable(CAP_SETGID))
return -EPERM;
if ((unsigned)gidsetsize > NGROUPS_MAX)
return -EINVAL;
group_info = groups_alloc(gidsetsize);
if (!group_info)
return -ENOMEM;
retval = groups16_from_user(group_info, grouplist);
if (retval) {
put_group_info(group_info);
return retval;
}
retval = set_current_groups(group_info);
put_group_info(group_info);
return retval;
}
asmlinkage long
sys32_truncate64 (unsigned int path, unsigned int len_lo, unsigned int len_hi)
{
return sys_truncate((const char *) A(path), ((unsigned long) len_hi << 32) | len_lo);
}
asmlinkage long
sys32_ftruncate64 (int fd, unsigned int len_lo, unsigned int len_hi)
{
return sys_ftruncate(fd, ((unsigned long) len_hi << 32) | len_lo);
}
static int
putstat64 (struct stat64 *ubuf, struct kstat *kbuf)
{
int err;
u64 hdev;
if (clear_user(ubuf, sizeof(*ubuf)))
return -EFAULT;
hdev = huge_encode_dev(kbuf->dev);
err = __put_user(hdev, (u32*)&ubuf->st_dev);
err |= __put_user(hdev >> 32, ((u32*)&ubuf->st_dev) + 1);
err |= __put_user(kbuf->ino, &ubuf->__st_ino);
err |= __put_user(kbuf->ino, &ubuf->st_ino_lo);
err |= __put_user(kbuf->ino >> 32, &ubuf->st_ino_hi);
err |= __put_user(kbuf->mode, &ubuf->st_mode);
err |= __put_user(kbuf->nlink, &ubuf->st_nlink);
err |= __put_user(kbuf->uid, &ubuf->st_uid);
err |= __put_user(kbuf->gid, &ubuf->st_gid);
hdev = huge_encode_dev(kbuf->rdev);
err = __put_user(hdev, (u32*)&ubuf->st_rdev);
err |= __put_user(hdev >> 32, ((u32*)&ubuf->st_rdev) + 1);
err |= __put_user(kbuf->size, &ubuf->st_size_lo);
err |= __put_user((kbuf->size >> 32), &ubuf->st_size_hi);
err |= __put_user(kbuf->atime.tv_sec, &ubuf->st_atime);
err |= __put_user(kbuf->atime.tv_nsec, &ubuf->st_atime_nsec);
err |= __put_user(kbuf->mtime.tv_sec, &ubuf->st_mtime);
err |= __put_user(kbuf->mtime.tv_nsec, &ubuf->st_mtime_nsec);
err |= __put_user(kbuf->ctime.tv_sec, &ubuf->st_ctime);
err |= __put_user(kbuf->ctime.tv_nsec, &ubuf->st_ctime_nsec);
err |= __put_user(kbuf->blksize, &ubuf->st_blksize);
err |= __put_user(kbuf->blocks, &ubuf->st_blocks);
return err;
}
asmlinkage long
sys32_stat64 (char *filename, struct stat64 *statbuf)
{
struct kstat s;
long ret = vfs_stat(filename, &s);
if (!ret)
ret = putstat64(statbuf, &s);
return ret;
}
asmlinkage long
sys32_lstat64 (char *filename, struct stat64 *statbuf)
{
struct kstat s;
long ret = vfs_lstat(filename, &s);
if (!ret)
ret = putstat64(statbuf, &s);
return ret;
}
asmlinkage long
sys32_fstat64 (unsigned int fd, struct stat64 *statbuf)
{
struct kstat s;
long ret = vfs_fstat(fd, &s);
if (!ret)
ret = putstat64(statbuf, &s);
return ret;
}
struct sysinfo32 {
s32 uptime;
u32 loads[3];
u32 totalram;
u32 freeram;
u32 sharedram;
u32 bufferram;
u32 totalswap;
u32 freeswap;
u16 procs;
u16 pad;
u32 totalhigh;
u32 freehigh;
u32 mem_unit;
char _f[8];
};
asmlinkage long
sys32_sysinfo (struct sysinfo32 *info)
{
struct sysinfo s;
long ret, err;
int bitcount = 0;
mm_segment_t old_fs = get_fs();
set_fs(KERNEL_DS);
ret = sys_sysinfo(&s);
set_fs(old_fs);
/* Check to see if any memory value is too large for 32-bit and
* scale down if needed.
*/
if ((s.totalram >> 32) || (s.totalswap >> 32)) {
while (s.mem_unit < PAGE_SIZE) {
s.mem_unit <<= 1;
bitcount++;
}
s.totalram >>= bitcount;
s.freeram >>= bitcount;
s.sharedram >>= bitcount;
s.bufferram >>= bitcount;
s.totalswap >>= bitcount;
s.freeswap >>= bitcount;
s.totalhigh >>= bitcount;
s.freehigh >>= bitcount;
}
if (!access_ok(VERIFY_WRITE, info, sizeof(*info)))
return -EFAULT;
err = __put_user(s.uptime, &info->uptime);
err |= __put_user(s.loads[0], &info->loads[0]);
err |= __put_user(s.loads[1], &info->loads[1]);
err |= __put_user(s.loads[2], &info->loads[2]);
err |= __put_user(s.totalram, &info->totalram);
err |= __put_user(s.freeram, &info->freeram);
err |= __put_user(s.sharedram, &info->sharedram);
err |= __put_user(s.bufferram, &info->bufferram);
err |= __put_user(s.totalswap, &info->totalswap);
err |= __put_user(s.freeswap, &info->freeswap);
err |= __put_user(s.procs, &info->procs);
err |= __put_user (s.totalhigh, &info->totalhigh);
err |= __put_user (s.freehigh, &info->freehigh);
err |= __put_user (s.mem_unit, &info->mem_unit);
if (err)
return -EFAULT;
return ret;
}
asmlinkage long
sys32_sched_rr_get_interval (pid_t pid, struct compat_timespec *interval)
{
mm_segment_t old_fs = get_fs();
struct timespec t;
long ret;
set_fs(KERNEL_DS);
ret = sys_sched_rr_get_interval(pid, &t);
set_fs(old_fs);
if (put_compat_timespec(&t, interval))
return -EFAULT;
return ret;
}
asmlinkage long
sys32_pread (unsigned int fd, void *buf, unsigned int count, u32 pos_lo, u32 pos_hi)
{
return sys_pread64(fd, buf, count, ((unsigned long) pos_hi << 32) | pos_lo);
}
asmlinkage long
sys32_pwrite (unsigned int fd, void *buf, unsigned int count, u32 pos_lo, u32 pos_hi)
{
return sys_pwrite64(fd, buf, count, ((unsigned long) pos_hi << 32) | pos_lo);
}
asmlinkage long
sys32_sendfile (int out_fd, int in_fd, int *offset, unsigned int count)
{
mm_segment_t old_fs = get_fs();
long ret;
off_t of;
if (offset && get_user(of, offset))
return -EFAULT;
set_fs(KERNEL_DS);
ret = sys_sendfile(out_fd, in_fd, offset ? &of : NULL, count);
set_fs(old_fs);
if (!ret && offset && put_user(of, offset))
return -EFAULT;
return ret;
}
asmlinkage long
sys32_personality (unsigned int personality)
{
long ret;
if (current->personality == PER_LINUX32 && personality == PER_LINUX)
personality = PER_LINUX32;
ret = sys_personality(personality);
if (ret == PER_LINUX32)
ret = PER_LINUX;
return ret;
}
asmlinkage unsigned long
sys32_brk (unsigned int brk)
{
unsigned long ret, obrk;
struct mm_struct *mm = current->mm;
obrk = mm->brk;
ret = sys_brk(brk);
if (ret < obrk)
clear_user((void *) ret, PAGE_ALIGN(ret) - ret);
return ret;
}
/*
* Exactly like fs/open.c:sys_open(), except that it doesn't set the O_LARGEFILE flag.
*/
asmlinkage long
sys32_open (const char * filename, int flags, int mode)
{
char * tmp;
int fd, error;
tmp = getname(filename);
fd = PTR_ERR(tmp);
if (!IS_ERR(tmp)) {
fd = get_unused_fd();
if (fd >= 0) {
struct file *f = filp_open(tmp, flags, mode);
error = PTR_ERR(f);
if (IS_ERR(f))
goto out_error;
fd_install(fd, f);
}
out:
putname(tmp);
}
return fd;
out_error:
put_unused_fd(fd);
fd = error;
goto out;
}
/* Structure for ia32 emulation on ia64 */
struct epoll_event32
{
u32 events;
u32 data[2];
};
asmlinkage long
sys32_epoll_ctl(int epfd, int op, int fd, struct epoll_event32 *event)
{
mm_segment_t old_fs = get_fs();
struct epoll_event event64;
int error = -EFAULT;
u32 data_halfword;
if ((error = verify_area(VERIFY_READ, event,
sizeof(struct epoll_event32))))
return error;
__get_user(event64.events, &event->events);
__get_user(data_halfword, &event->data[0]);
event64.data = data_halfword;
__get_user(data_halfword, &event->data[1]);
event64.data |= (u64)data_halfword << 32;
set_fs(KERNEL_DS);
error = sys_epoll_ctl(epfd, op, fd, &event64);
set_fs(old_fs);
return error;
}
asmlinkage long
sys32_epoll_wait(int epfd, struct epoll_event32 *events, int maxevents,
int timeout)
{
struct epoll_event *events64 = NULL;
mm_segment_t old_fs = get_fs();
int error, numevents, size;
int evt_idx;
int do_free_pages = 0;
if (maxevents <= 0) {
return -EINVAL;
}
/* Verify that the area passed by the user is writeable */
if ((error = verify_area(VERIFY_WRITE, events,
maxevents * sizeof(struct epoll_event32))))
return error;
/*
* Allocate space for the intermediate copy. If the space needed
* is large enough to cause kmalloc to fail, then try again with
* __get_free_pages.
*/
size = maxevents * sizeof(struct epoll_event);
events64 = kmalloc(size, GFP_KERNEL);
if (events64 == NULL) {
events64 = (struct epoll_event *)
__get_free_pages(GFP_KERNEL, get_order(size));
if (events64 == NULL)
return -ENOMEM;
do_free_pages = 1;
}
/* Do the system call */
set_fs(KERNEL_DS); /* copy_to/from_user should work on kernel mem*/
numevents = sys_epoll_wait(epfd, events64, maxevents, timeout);
set_fs(old_fs);
/* Don't modify userspace memory if we're returning an error */
if (numevents > 0) {
/* Translate the 64-bit structures back into the 32-bit
structures */
for (evt_idx = 0; evt_idx < numevents; evt_idx++) {
__put_user(events64[evt_idx].events,
&events[evt_idx].events);
__put_user((u32)events64[evt_idx].data,
&events[evt_idx].data[0]);
__put_user((u32)(events64[evt_idx].data >> 32),
&events[evt_idx].data[1]);
}
}
if (do_free_pages)
free_pages((unsigned long) events64, get_order(size));
else
kfree(events64);
return numevents;
}
/*
* Get a yet unused TLS descriptor index.
*/
static int
get_free_idx (void)
{
struct thread_struct *t = ¤t->thread;
int idx;
for (idx = 0; idx < GDT_ENTRY_TLS_ENTRIES; idx++)
if (desc_empty(t->tls_array + idx))
return idx + GDT_ENTRY_TLS_MIN;
return -ESRCH;
}
/*
* Set a given TLS descriptor:
*/
asmlinkage int
sys32_set_thread_area (struct ia32_user_desc *u_info)
{
struct thread_struct *t = ¤t->thread;
struct ia32_user_desc info;
struct desc_struct *desc;
int cpu, idx;
if (copy_from_user(&info, u_info, sizeof(info)))
return -EFAULT;
idx = info.entry_number;
/*
* index -1 means the kernel should try to find and allocate an empty descriptor:
*/
if (idx == -1) {
idx = get_free_idx();
if (idx < 0)
return idx;
if (put_user(idx, &u_info->entry_number))
return -EFAULT;
}
if (idx < GDT_ENTRY_TLS_MIN || idx > GDT_ENTRY_TLS_MAX)
return -EINVAL;
desc = t->tls_array + idx - GDT_ENTRY_TLS_MIN;
cpu = smp_processor_id();
if (LDT_empty(&info)) {
desc->a = 0;
desc->b = 0;
} else {
desc->a = LDT_entry_a(&info);
desc->b = LDT_entry_b(&info);
}
load_TLS(t, cpu);
return 0;
}
/*
* Get the current Thread-Local Storage area:
*/
#define GET_BASE(desc) ( \
(((desc)->a >> 16) & 0x0000ffff) | \
(((desc)->b << 16) & 0x00ff0000) | \
( (desc)->b & 0xff000000) )
#define GET_LIMIT(desc) ( \
((desc)->a & 0x0ffff) | \
((desc)->b & 0xf0000) )
#define GET_32BIT(desc) (((desc)->b >> 22) & 1)
#define GET_CONTENTS(desc) (((desc)->b >> 10) & 3)
#define GET_WRITABLE(desc) (((desc)->b >> 9) & 1)
#define GET_LIMIT_PAGES(desc) (((desc)->b >> 23) & 1)
#define GET_PRESENT(desc) (((desc)->b >> 15) & 1)
#define GET_USEABLE(desc) (((desc)->b >> 20) & 1)
asmlinkage int
sys32_get_thread_area (struct ia32_user_desc *u_info)
{
struct ia32_user_desc info;
struct desc_struct *desc;
int idx;
if (get_user(idx, &u_info->entry_number))
return -EFAULT;
if (idx < GDT_ENTRY_TLS_MIN || idx > GDT_ENTRY_TLS_MAX)
return -EINVAL;
desc = current->thread.tls_array + idx - GDT_ENTRY_TLS_MIN;
info.entry_number = idx;
info.base_addr = GET_BASE(desc);
info.limit = GET_LIMIT(desc);
info.seg_32bit = GET_32BIT(desc);
info.contents = GET_CONTENTS(desc);
info.read_exec_only = !GET_WRITABLE(desc);
info.limit_in_pages = GET_LIMIT_PAGES(desc);
info.seg_not_present = !GET_PRESENT(desc);
info.useable = GET_USEABLE(desc);
if (copy_to_user(u_info, &info, sizeof(info)))
return -EFAULT;
return 0;
}
extern asmlinkage long
sys_timer_create(clockid_t which_clock, struct sigevent *timer_event_spec,
timer_t * created_timer_id);
asmlinkage long
sys32_timer_create(u32 clock, struct sigevent32 *se32, timer_t *timer_id)
{
struct sigevent se;
mm_segment_t oldfs;
timer_t t;
long err;
if (se32 == NULL)
return sys_timer_create(clock, NULL, timer_id);
memset(&se, 0, sizeof(struct sigevent));
if (get_user(se.sigev_value.sival_int, &se32->sigev_value.sival_int) ||
__get_user(se.sigev_signo, &se32->sigev_signo) ||
__get_user(se.sigev_notify, &se32->sigev_notify) ||
__copy_from_user(&se._sigev_un._pad, &se32->_sigev_un._pad,
sizeof(se._sigev_un._pad)))
return -EFAULT;
if (!access_ok(VERIFY_WRITE,timer_id,sizeof(timer_t)))
return -EFAULT;
oldfs = get_fs();
set_fs(KERNEL_DS);
err = sys_timer_create(clock, &se, &t);
set_fs(oldfs);
if (!err)
err = __put_user (t, timer_id);
return err;
}
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);
}
#ifdef NOTYET /* UNTESTED FOR IA64 FROM HERE DOWN */
asmlinkage long sys32_setreuid(compat_uid_t ruid, compat_uid_t euid)
{
uid_t sruid, seuid;
sruid = (ruid == (compat_uid_t)-1) ? ((uid_t)-1) : ((uid_t)ruid);
seuid = (euid == (compat_uid_t)-1) ? ((uid_t)-1) : ((uid_t)euid);
return sys_setreuid(sruid, seuid);
}
asmlinkage long
sys32_setresuid(compat_uid_t ruid, compat_uid_t euid,
compat_uid_t suid)
{
uid_t sruid, seuid, ssuid;
sruid = (ruid == (compat_uid_t)-1) ? ((uid_t)-1) : ((uid_t)ruid);
seuid = (euid == (compat_uid_t)-1) ? ((uid_t)-1) : ((uid_t)euid);
ssuid = (suid == (compat_uid_t)-1) ? ((uid_t)-1) : ((uid_t)suid);
return sys_setresuid(sruid, seuid, ssuid);
}
asmlinkage long
sys32_setregid(compat_gid_t rgid, compat_gid_t egid)
{
gid_t srgid, segid;
srgid = (rgid == (compat_gid_t)-1) ? ((gid_t)-1) : ((gid_t)rgid);
segid = (egid == (compat_gid_t)-1) ? ((gid_t)-1) : ((gid_t)egid);
return sys_setregid(srgid, segid);
}
asmlinkage long
sys32_setresgid(compat_gid_t rgid, compat_gid_t egid,
compat_gid_t sgid)
{
gid_t srgid, segid, ssgid;
srgid = (rgid == (compat_gid_t)-1) ? ((gid_t)-1) : ((gid_t)rgid);
segid = (egid == (compat_gid_t)-1) ? ((gid_t)-1) : ((gid_t)egid);
ssgid = (sgid == (compat_gid_t)-1) ? ((gid_t)-1) : ((gid_t)sgid);
return sys_setresgid(srgid, segid, ssgid);
}
/* Handle adjtimex compatibility. */
struct timex32 {
u32 modes;
s32 offset, freq, maxerror, esterror;
s32 status, constant, precision, tolerance;
struct compat_timeval time;
s32 tick;
s32 ppsfreq, jitter, shift, stabil;
s32 jitcnt, calcnt, errcnt, stbcnt;
s32 :32; s32 :32; s32 :32; s32 :32;
s32 :32; s32 :32; s32 :32; s32 :32;
s32 :32; s32 :32; s32 :32; s32 :32;
};
extern int do_adjtimex(struct timex *);
asmlinkage long
sys32_adjtimex(struct timex32 *utp)
{
struct timex txc;
int ret;
memset(&txc, 0, sizeof(struct timex));
if(get_user(txc.modes, &utp->modes) ||
__get_user(txc.offset, &utp->offset) ||
__get_user(txc.freq, &utp->freq) ||
__get_user(txc.maxerror, &utp->maxerror) ||
__get_user(txc.esterror, &utp->esterror) ||
__get_user(txc.status, &utp->status) ||
__get_user(txc.constant, &utp->constant) ||
__get_user(txc.precision, &utp->precision) ||
__get_user(txc.tolerance, &utp->tolerance) ||
__get_user(txc.time.tv_sec, &utp->time.tv_sec) ||
__get_user(txc.time.tv_usec, &utp->time.tv_usec) ||
__get_user(txc.tick, &utp->tick) ||
__get_user(txc.ppsfreq, &utp->ppsfreq) ||
__get_user(txc.jitter, &utp->jitter) ||
__get_user(txc.shift, &utp->shift) ||
__get_user(txc.stabil, &utp->stabil) ||
__get_user(txc.jitcnt, &utp->jitcnt) ||
__get_user(txc.calcnt, &utp->calcnt) ||
__get_user(txc.errcnt, &utp->errcnt) ||
__get_user(txc.stbcnt, &utp->stbcnt))
return -EFAULT;
ret = do_adjtimex(&txc);
if(put_user(txc.modes, &utp->modes) ||
__put_user(txc.offset, &utp->offset) ||
__put_user(txc.freq, &utp->freq) ||
__put_user(txc.maxerror, &utp->maxerror) ||
__put_user(txc.esterror, &utp->esterror) ||
__put_user(txc.status, &utp->status) ||
__put_user(txc.constant, &utp->constant) ||
__put_user(txc.precision, &utp->precision) ||
__put_user(txc.tolerance, &utp->tolerance) ||
__put_user(txc.time.tv_sec, &utp->time.tv_sec) ||
__put_user(txc.time.tv_usec, &utp->time.tv_usec) ||
__put_user(txc.tick, &utp->tick) ||
__put_user(txc.ppsfreq, &utp->ppsfreq) ||
__put_user(txc.jitter, &utp->jitter) ||
__put_user(txc.shift, &utp->shift) ||
__put_user(txc.stabil, &utp->stabil) ||
__put_user(txc.jitcnt, &utp->jitcnt) ||
__put_user(txc.calcnt, &utp->calcnt) ||
__put_user(txc.errcnt, &utp->errcnt) ||
__put_user(txc.stbcnt, &utp->stbcnt))
ret = -EFAULT;
return ret;
}
#endif /* NOTYET */
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