Subversion Repositories or1k_soc_on_altera_embedded_dev_kit

/*

 * sys_ppc32.c: Conversion between 32bit and 64bit native syscalls.

 *

 * Copyright (C) 2001 IBM

 * Copyright (C) 1997,1998 Jakub Jelinek (jj@sunsite.mff.cuni.cz)

 * Copyright (C) 1997 David S. Miller (davem@caip.rutgers.edu)

 *

 * These routines maintain argument size conversion between 32bit and 64bit

 * environment.

 *

 *      This program is free software; you can redistribute it and/or

 *      modify it under the terms of the GNU General Public License

 *      as published by the Free Software Foundation; either version

 *      2 of the License, or (at your option) any later version.

 */

#include <linux/kernel.h>

#include <linux/sched.h>

#include <linux/fs.h> 

#include <linux/mm.h> 

#include <linux/file.h> 

#include <linux/signal.h>

#include <linux/resource.h>

#include <linux/times.h>

#include <linux/utsname.h>

#include <linux/smp.h>

#include <linux/smp_lock.h>

#include <linux/sem.h>

#include <linux/msg.h>

#include <linux/shm.h>

#include <linux/poll.h>

#include <linux/personality.h>

#include <linux/stat.h>

#include <linux/mman.h>

#include <linux/in.h>

#include <linux/syscalls.h>

#include <linux/unistd.h>

#include <linux/sysctl.h>

#include <linux/binfmts.h>

#include <linux/security.h>

#include <linux/compat.h>

#include <linux/ptrace.h>

#include <linux/elf.h>

#include <linux/ipc.h>

#include <asm/ptrace.h>

#include <asm/types.h>

#include <asm/uaccess.h>

#include <asm/unistd.h>

#include <asm/semaphore.h>

#include <asm/time.h>

#include <asm/mmu_context.h>

#include <asm/ppc-pci.h>

#include <asm/syscalls.h>

struct old_linux_dirent32 {

        u32             d_ino;

        u32             d_offset;

        unsigned short  d_namlen;

        char            d_name[1];

};

struct readdir_callback32 {

        struct old_linux_dirent32 __user * dirent;

        int count;

};

static int fillonedir(void * __buf, const char * name, int namlen,

                                  off_t offset, u64 ino, unsigned int d_type)

{

        struct readdir_callback32 * buf = (struct readdir_callback32 *) __buf;

        struct old_linux_dirent32 __user * dirent;

        ino_t d_ino;

        if (buf->count)

                return -EINVAL;

        d_ino = ino;

        if (sizeof(d_ino) < sizeof(ino) && d_ino != ino)

                return -EOVERFLOW;

        buf->count++;

        dirent = buf->dirent;

        put_user(d_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 0;

}

asmlinkage int old32_readdir(unsigned int fd, struct old_linux_dirent32 __user *dirent, unsigned int count)

{

        int error = -EBADF;

        struct file * file;

        struct readdir_callback32 buf;

        file = fget(fd);

        if (!file)

                goto out;

        buf.count = 0;

        buf.dirent = dirent;

        error = vfs_readdir(file, (filldir_t)fillonedir, &buf);

        if (error < 0)

                goto out_putf;

        error = buf.count;

out_putf:

        fput(file);

out:

        return error;

}

asmlinkage long ppc32_select(u32 n, compat_ulong_t __user *inp,

                compat_ulong_t __user *outp, compat_ulong_t __user *exp,

                compat_uptr_t tvp_x)

{

        /* sign extend n */

        return compat_sys_select((int)n, inp, outp, exp, compat_ptr(tvp_x));

}

int cp_compat_stat(struct kstat *stat, struct compat_stat __user *statbuf)

{

        compat_ino_t ino;

        long err;

        if (stat->size > MAX_NON_LFS || !new_valid_dev(stat->dev) ||

            !new_valid_dev(stat->rdev))

                return -EOVERFLOW;

        ino = stat->ino;

        if (sizeof(ino) < sizeof(stat->ino) && ino != stat->ino)

                return -EOVERFLOW;

        err  = access_ok(VERIFY_WRITE, statbuf, sizeof(*statbuf)) ? 0 : -EFAULT;

        err |= __put_user(new_encode_dev(stat->dev), &statbuf->st_dev);

        err |= __put_user(ino, &statbuf->st_ino);

        err |= __put_user(stat->mode, &statbuf->st_mode);

        err |= __put_user(stat->nlink, &statbuf->st_nlink);

        err |= __put_user(stat->uid, &statbuf->st_uid);

        err |= __put_user(stat->gid, &statbuf->st_gid);

        err |= __put_user(new_encode_dev(stat->rdev), &statbuf->st_rdev);

        err |= __put_user(stat->size, &statbuf->st_size);

        err |= __put_user(stat->atime.tv_sec, &statbuf->st_atime);

        err |= __put_user(stat->atime.tv_nsec, &statbuf->st_atime_nsec);

        err |= __put_user(stat->mtime.tv_sec, &statbuf->st_mtime);

        err |= __put_user(stat->mtime.tv_nsec, &statbuf->st_mtime_nsec);

        err |= __put_user(stat->ctime.tv_sec, &statbuf->st_ctime);

        err |= __put_user(stat->ctime.tv_nsec, &statbuf->st_ctime_nsec);

        err |= __put_user(stat->blksize, &statbuf->st_blksize);

        err |= __put_user(stat->blocks, &statbuf->st_blocks);

        err |= __put_user(0, &statbuf->__unused4[0]);

        err |= __put_user(0, &statbuf->__unused4[1]);

        return err;

}

/* Note: it is necessary to treat option as an unsigned int,

 * with the corresponding cast to a signed int to insure that the

 * proper conversion (sign extension) between the register representation of a signed int (msr in 32-bit mode)

 * and the register representation of a signed int (msr in 64-bit mode) is performed.

 */

asmlinkage long compat_sys_sysfs(u32 option, u32 arg1, u32 arg2)

{

        return sys_sysfs((int)option, arg1, arg2);

}

asmlinkage long compat_sys_pause(void)

{

        current->state = TASK_INTERRUPTIBLE;

        schedule();

        return -ERESTARTNOHAND;

}

static inline long get_ts32(struct timespec *o, struct compat_timeval __user *i)

{

        long usec;

        if (!access_ok(VERIFY_READ, i, sizeof(*i)))

                return -EFAULT;

        if (__get_user(o->tv_sec, &i->tv_sec))

                return -EFAULT;

        if (__get_user(usec, &i->tv_usec))

                return -EFAULT;

        o->tv_nsec = usec * 1000;

        return 0;

}

static inline long put_tv32(struct compat_timeval __user *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)));

}

/* Translations due to time_t size differences.  Which affects all

   sorts of things, like timeval and itimerval.  */

extern struct timezone sys_tz;

asmlinkage long compat_sys_gettimeofday(struct compat_timeval __user *tv, struct timezone __user *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 compat_sys_settimeofday(struct compat_timeval __user *tv, struct timezone __user *tz)

{

        struct timespec kts;

        struct timezone ktz;

        if (tv) {

                if (get_ts32(&kts, tv))

                        return -EFAULT;

        }

        if (tz) {

                if (copy_from_user(&ktz, tz, sizeof(ktz)))

                        return -EFAULT;

        }

        return do_sys_settimeofday(tv ? &kts : NULL, tz ? &ktz : NULL);

}

#ifdef CONFIG_SYSVIPC

long compat_sys_ipc(u32 call, u32 first, u32 second, u32 third, compat_uptr_t ptr,

               u32 fifth)

{

        int version;

        version = call >> 16; /* hack for backward compatibility */

        call &= 0xffff;

        switch (call) {

        case SEMTIMEDOP:

                if (fifth)

                        /* sign extend semid */

                        return compat_sys_semtimedop((int)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 :)) */

                /* sign extend semid */

                return sys_semtimedop((int)first, compat_ptr(ptr), second,

                                      NULL);

        case SEMGET:

                /* sign extend key, nsems */

                return sys_semget((int)first, (int)second, third);

        case SEMCTL:

                /* sign extend semid, semnum */

                return compat_sys_semctl((int)first, (int)second, third,

                                         compat_ptr(ptr));

        case MSGSND:

                /* sign extend msqid */

                return compat_sys_msgsnd((int)first, (int)second, third,

                                         compat_ptr(ptr));

        case MSGRCV:

                /* sign extend msqid, msgtyp */

                return compat_sys_msgrcv((int)first, second, (int)fifth,

                                         third, version, compat_ptr(ptr));

        case MSGGET:

                /* sign extend key */

                return sys_msgget((int)first, second);

        case MSGCTL:

                /* sign extend msqid */

                return compat_sys_msgctl((int)first, second, compat_ptr(ptr));

        case SHMAT:

                /* sign extend shmid */

                return compat_sys_shmat((int)first, second, third, version,

                                        compat_ptr(ptr));

        case SHMDT:

                return sys_shmdt(compat_ptr(ptr));

        case SHMGET:

                /* sign extend key_t */

                return sys_shmget((int)first, second, third);

        case SHMCTL:

                /* sign extend shmid */

                return compat_sys_shmctl((int)first, second, compat_ptr(ptr));

        default:

                return -ENOSYS;

        }

        return -ENOSYS;

}

#endif

/* Note: it is necessary to treat out_fd and in_fd as unsigned ints,

 * with the corresponding cast to a signed int to insure that the

 * proper conversion (sign extension) between the register representation of a signed int (msr in 32-bit mode)

 * and the register representation of a signed int (msr in 64-bit mode) is performed.

 */

asmlinkage long compat_sys_sendfile(u32 out_fd, u32 in_fd, compat_off_t __user * offset, u32 count)

{

        mm_segment_t old_fs = get_fs();

        int ret;

        off_t of;

        off_t __user *up;

        if (offset && get_user(of, offset))

                return -EFAULT;

        /* The __user pointer cast is valid because of the set_fs() */

        set_fs(KERNEL_DS);

        up = offset ? (off_t __user *) &of : NULL;

        ret = sys_sendfile((int)out_fd, (int)in_fd, up, count);

        set_fs(old_fs);

        if (offset && put_user(of, offset))

                return -EFAULT;

        return ret;

}

asmlinkage int compat_sys_sendfile64(int out_fd, int in_fd, compat_loff_t __user *offset, s32 count)

{

        mm_segment_t old_fs = get_fs();

        int ret;

        loff_t lof;

        loff_t __user *up;

        if (offset && get_user(lof, offset))

                return -EFAULT;

        /* The __user pointer cast is valid because of the set_fs() */

        set_fs(KERNEL_DS);

        up = offset ? (loff_t __user *) &lof : NULL;

        ret = sys_sendfile64(out_fd, in_fd, up, count);

        set_fs(old_fs);

        if (offset && put_user(lof, offset))

                return -EFAULT;

        return ret;

}

long compat_sys_execve(unsigned long a0, unsigned long a1, unsigned long a2,

                  unsigned long a3, unsigned long a4, unsigned long a5,

                  struct pt_regs *regs)

{

        int error;

        char * filename;

        filename = getname((char __user *) a0);

        error = PTR_ERR(filename);

        if (IS_ERR(filename))

                goto out;

        flush_fp_to_thread(current);

        flush_altivec_to_thread(current);

        error = compat_do_execve(filename, compat_ptr(a1), compat_ptr(a2), regs);

        if (error == 0) {

                task_lock(current);

                current->ptrace &= ~PT_DTRACE;

                task_unlock(current);

        }

        putname(filename);

out:

        return error;

}

/* Note: it is necessary to treat option as an unsigned int,

 * with the corresponding cast to a signed int to insure that the

 * proper conversion (sign extension) between the register representation of a signed int (msr in 32-bit mode)

 * and the register representation of a signed int (msr in 64-bit mode) is performed.

 */

asmlinkage long compat_sys_prctl(u32 option, u32 arg2, u32 arg3, u32 arg4, u32 arg5)

{

        return sys_prctl((int)option,

                         (unsigned long) arg2,

                         (unsigned long) arg3,

                         (unsigned long) arg4,

                         (unsigned long) arg5);

}

/* Note: it is necessary to treat pid as an unsigned int,

 * with the corresponding cast to a signed int to insure that the

 * proper conversion (sign extension) between the register representation of a signed int (msr in 32-bit mode)

 * and the register representation of a signed int (msr in 64-bit mode) is performed.

 */

asmlinkage long compat_sys_sched_rr_get_interval(u32 pid, struct compat_timespec __user *interval)

{

        struct timespec t;

        int ret;

        mm_segment_t old_fs = get_fs ();

        /* The __user pointer cast is valid because of the set_fs() */

        set_fs (KERNEL_DS);

        ret = sys_sched_rr_get_interval((int)pid, (struct timespec __user *) &t);

        set_fs (old_fs);

        if (put_compat_timespec(&t, interval))

                return -EFAULT;

        return ret;

}

/* Note: it is necessary to treat mode as an unsigned int,

 * with the corresponding cast to a signed int to insure that the

 * proper conversion (sign extension) between the register representation of a signed int (msr in 32-bit mode)

 * and the register representation of a signed int (msr in 64-bit mode) is performed.

 */

asmlinkage long compat_sys_access(const char __user * filename, u32 mode)

{

        return sys_access(filename, (int)mode);

}

/* Note: it is necessary to treat mode as an unsigned int,

 * with the corresponding cast to a signed int to insure that the

 * proper conversion (sign extension) between the register representation of a signed int (msr in 32-bit mode)

 * and the register representation of a signed int (msr in 64-bit mode) is performed.

 */

asmlinkage long compat_sys_creat(const char __user * pathname, u32 mode)

{

        return sys_creat(pathname, (int)mode);

}

/* Note: it is necessary to treat pid and options as unsigned ints,

 * with the corresponding cast to a signed int to insure that the

 * proper conversion (sign extension) between the register representation of a signed int (msr in 32-bit mode)

 * and the register representation of a signed int (msr in 64-bit mode) is performed.

 */

asmlinkage long compat_sys_waitpid(u32 pid, unsigned int __user * stat_addr, u32 options)

{

        return sys_waitpid((int)pid, stat_addr, (int)options);

}

/* Note: it is necessary to treat gidsetsize as an unsigned int,

 * with the corresponding cast to a signed int to insure that the

 * proper conversion (sign extension) between the register representation of a signed int (msr in 32-bit mode)

 * and the register representation of a signed int (msr in 64-bit mode) is performed.

 */

asmlinkage long compat_sys_getgroups(u32 gidsetsize, gid_t __user *grouplist)

{

        return sys_getgroups((int)gidsetsize, grouplist);

}

/* Note: it is necessary to treat pid as an unsigned int,

 * with the corresponding cast to a signed int to insure that the

 * proper conversion (sign extension) between the register representation of a signed int (msr in 32-bit mode)

 * and the register representation of a signed int (msr in 64-bit mode) is performed.

 */

asmlinkage long compat_sys_getpgid(u32 pid)

{

        return sys_getpgid((int)pid);

}

/* Note: it is necessary to treat pid as an unsigned int,

 * with the corresponding cast to a signed int to insure that the

 * proper conversion (sign extension) between the register representation of a signed int (msr in 32-bit mode)

 * and the register representation of a signed int (msr in 64-bit mode) is performed.

 */

asmlinkage long compat_sys_getsid(u32 pid)

{

        return sys_getsid((int)pid);

}

/* Note: it is necessary to treat pid and sig as unsigned ints,

 * with the corresponding cast to a signed int to insure that the

 * proper conversion (sign extension) between the register representation of a signed int (msr in 32-bit mode)

 * and the register representation of a signed int (msr in 64-bit mode) is performed.

 */

asmlinkage long compat_sys_kill(u32 pid, u32 sig)

{

        return sys_kill((int)pid, (int)sig);

}

/* Note: it is necessary to treat mode as an unsigned int,

 * with the corresponding cast to a signed int to insure that the

 * proper conversion (sign extension) between the register representation of a signed int (msr in 32-bit mode)

 * and the register representation of a signed int (msr in 64-bit mode) is performed.

 */

asmlinkage long compat_sys_mkdir(const char __user * pathname, u32 mode)

{

        return sys_mkdir(pathname, (int)mode);

}

long compat_sys_nice(u32 increment)

{

        /* sign extend increment */

        return sys_nice((int)increment);

}

off_t ppc32_lseek(unsigned int fd, u32 offset, unsigned int origin)

{

        /* sign extend n */

        return sys_lseek(fd, (int)offset, origin);

}

/* Note: it is necessary to treat bufsiz as an unsigned int,

 * with the corresponding cast to a signed int to insure that the

 * proper conversion (sign extension) between the register representation of a signed int (msr in 32-bit mode)

 * and the register representation of a signed int (msr in 64-bit mode) is performed.

 */

asmlinkage long compat_sys_readlink(const char __user * path, char __user * buf, u32 bufsiz)

{

        return sys_readlink(path, buf, (int)bufsiz);

}

/* Note: it is necessary to treat option as an unsigned int,

 * with the corresponding cast to a signed int to insure that the

 * proper conversion (sign extension) between the register representation of a signed int (msr in 32-bit mode)

 * and the register representation of a signed int (msr in 64-bit mode) is performed.

 */

asmlinkage long compat_sys_sched_get_priority_max(u32 policy)

{

        return sys_sched_get_priority_max((int)policy);

}

/* Note: it is necessary to treat policy as an unsigned int,

 * with the corresponding cast to a signed int to insure that the

 * proper conversion (sign extension) between the register representation of a signed int (msr in 32-bit mode)

 * and the register representation of a signed int (msr in 64-bit mode) is performed.

 */

asmlinkage long compat_sys_sched_get_priority_min(u32 policy)

{

        return sys_sched_get_priority_min((int)policy);

}

/* Note: it is necessary to treat pid as an unsigned int,

 * with the corresponding cast to a signed int to insure that the

 * proper conversion (sign extension) between the register representation of a signed int (msr in 32-bit mode)

 * and the register representation of a signed int (msr in 64-bit mode) is performed.

 */

asmlinkage long compat_sys_sched_getparam(u32 pid, struct sched_param __user *param)

{

        return sys_sched_getparam((int)pid, param);

}

/* Note: it is necessary to treat pid as an unsigned int,

 * with the corresponding cast to a signed int to insure that the

 * proper conversion (sign extension) between the register representation of a signed int (msr in 32-bit mode)

 * and the register representation of a signed int (msr in 64-bit mode) is performed.

 */

asmlinkage long compat_sys_sched_getscheduler(u32 pid)

{

        return sys_sched_getscheduler((int)pid);

}

/* Note: it is necessary to treat pid as an unsigned int,

 * with the corresponding cast to a signed int to insure that the

 * proper conversion (sign extension) between the register representation of a signed int (msr in 32-bit mode)

 * and the register representation of a signed int (msr in 64-bit mode) is performed.

 */

asmlinkage long compat_sys_sched_setparam(u32 pid, struct sched_param __user *param)

{

        return sys_sched_setparam((int)pid, param);

}

/* Note: it is necessary to treat pid and policy as unsigned ints,

 * with the corresponding cast to a signed int to insure that the

 * proper conversion (sign extension) between the register representation of a signed int (msr in 32-bit mode)

 * and the register representation of a signed int (msr in 64-bit mode) is performed.

 */

asmlinkage long compat_sys_sched_setscheduler(u32 pid, u32 policy, struct sched_param __user *param)

{

        return sys_sched_setscheduler((int)pid, (int)policy, param);

}

/* Note: it is necessary to treat len as an unsigned int,

 * with the corresponding cast to a signed int to insure that the

 * proper conversion (sign extension) between the register representation of a signed int (msr in 32-bit mode)

 * and the register representation of a signed int (msr in 64-bit mode) is performed.

 */

asmlinkage long compat_sys_setdomainname(char __user *name, u32 len)

{

        return sys_setdomainname(name, (int)len);

}

/* Note: it is necessary to treat gidsetsize as an unsigned int,

 * with the corresponding cast to a signed int to insure that the

 * proper conversion (sign extension) between the register representation of a signed int (msr in 32-bit mode)

 * and the register representation of a signed int (msr in 64-bit mode) is performed.

 */

asmlinkage long compat_sys_setgroups(u32 gidsetsize, gid_t __user *grouplist)

{

        return sys_setgroups((int)gidsetsize, grouplist);

}

asmlinkage long compat_sys_sethostname(char __user *name, u32 len)

{

        /* sign extend len */

        return sys_sethostname(name, (int)len);

}

/* Note: it is necessary to treat pid and pgid as unsigned ints,

 * with the corresponding cast to a signed int to insure that the

 * proper conversion (sign extension) between the register representation of a signed int (msr in 32-bit mode)

 * and the register representation of a signed int (msr in 64-bit mode) is performed.

 */

asmlinkage long compat_sys_setpgid(u32 pid, u32 pgid)

{

        return sys_setpgid((int)pid, (int)pgid);

}

long compat_sys_getpriority(u32 which, u32 who)

{

        /* sign extend which and who */

        return sys_getpriority((int)which, (int)who);

}

long compat_sys_setpriority(u32 which, u32 who, u32 niceval)

{

        /* sign extend which, who and niceval */

        return sys_setpriority((int)which, (int)who, (int)niceval);

}

long compat_sys_ioprio_get(u32 which, u32 who)

{

        /* sign extend which and who */

        return sys_ioprio_get((int)which, (int)who);

}

long compat_sys_ioprio_set(u32 which, u32 who, u32 ioprio)

{

        /* sign extend which, who and ioprio */

        return sys_ioprio_set((int)which, (int)who, (int)ioprio);

}

/* Note: it is necessary to treat newmask as an unsigned int,

 * with the corresponding cast to a signed int to insure that the

 * proper conversion (sign extension) between the register representation of a signed int (msr in 32-bit mode)

 * and the register representation of a signed int (msr in 64-bit mode) is performed.

 */

asmlinkage long compat_sys_ssetmask(u32 newmask)

{

        return sys_ssetmask((int) newmask);

}

asmlinkage long compat_sys_syslog(u32 type, char __user * buf, u32 len)

{

        /* sign extend len */

        return sys_syslog(type, buf, (int)len);

}

/* Note: it is necessary to treat mask as an unsigned int,

 * with the corresponding cast to a signed int to insure that the

 * proper conversion (sign extension) between the register representation of a signed int (msr in 32-bit mode)

 * and the register representation of a signed int (msr in 64-bit mode) is performed.

 */

asmlinkage long compat_sys_umask(u32 mask)

{

        return sys_umask((int)mask);

}

#ifdef CONFIG_SYSCTL_SYSCALL

struct __sysctl_args32 {

        u32 name;

        int nlen;

        u32 oldval;

        u32 oldlenp;

        u32 newval;

        u32 newlen;

        u32 __unused[4];