arch/powerpc/kernel/sys_ppc32.c - arm/linux-arm64-legacy - Git at Google

 /*
  * 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/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 <linux/slab.h>

 #include <asm/ptrace.h>
 #include <asm/types.h>
 #include <asm/uaccess.h>
 #include <asm/unistd.h>
 #include <asm/time.h>
 #include <asm/mmu_context.h>
 #include <asm/ppc-pci.h>
 #include <asm/syscalls.h>


 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));
 }

 /* 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);
 }

 #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);

 	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);
 }

 long compat_sys_truncate(const char __user * path, u32 length)
 {
 	/* sign extend length */
 	return sys_truncate(path, (int)length);
 }

 long compat_sys_ftruncate(int fd, u32 length)
 {
 	/* sign extend length */
 	return sys_ftruncate(fd, (int)length);
 }

 /* 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);
 }

 unsigned long compat_sys_mmap2(unsigned long addr, size_t len,
 			  unsigned long prot, unsigned long flags,
 			  unsigned long fd, unsigned long pgoff)
 {
 	/* This should remain 12 even if PAGE_SIZE changes */
 	return sys_mmap(addr, len, prot, flags, fd, pgoff << 12);
 }

 long compat_sys_tgkill(u32 tgid, u32 pid, int sig)
 {
 	/* sign extend tgid, pid */
 	return sys_tgkill((int)tgid, (int)pid, sig);
 }

 /*
  * long long munging:
  * The 32 bit ABI passes long longs in an odd even register pair.
  */

 compat_ssize_t compat_sys_pread64(unsigned int fd, char __user *ubuf, compat_size_t count,
 			     u32 reg6, u32 poshi, u32 poslo)
 {
 	return sys_pread64(fd, ubuf, count, ((loff_t)poshi << 32) | poslo);
 }

 compat_ssize_t compat_sys_pwrite64(unsigned int fd, char __user *ubuf, compat_size_t count,
 			      u32 reg6, u32 poshi, u32 poslo)
 {
 	return sys_pwrite64(fd, ubuf, count, ((loff_t)poshi << 32) | poslo);
 }

 compat_ssize_t compat_sys_readahead(int fd, u32 r4, u32 offhi, u32 offlo, u32 count)
 {
 	return sys_readahead(fd, ((loff_t)offhi << 32) | offlo, count);
 }

 asmlinkage int compat_sys_truncate64(const char __user * path, u32 reg4,
 				unsigned long high, unsigned long low)
 {
 	return sys_truncate(path, (high << 32) | low);
 }

 asmlinkage long compat_sys_fallocate(int fd, int mode, u32 offhi, u32 offlo,
 				     u32 lenhi, u32 lenlo)
 {
 	return sys_fallocate(fd, mode, ((loff_t)offhi << 32) | offlo,
 			     ((loff_t)lenhi << 32) | lenlo);
 }

 asmlinkage int compat_sys_ftruncate64(unsigned int fd, u32 reg4, unsigned long high,
 				 unsigned long low)
 {
 	return sys_ftruncate(fd, (high << 32) | low);
 }

 long ppc32_lookup_dcookie(u32 cookie_high, u32 cookie_low, char __user *buf,
 			  size_t len)
 {
 	return sys_lookup_dcookie((u64)cookie_high << 32 | cookie_low,
 				  buf, len);
 }

 long ppc32_fadvise64(int fd, u32 unused, u32 offset_high, u32 offset_low,
 		     size_t len, int advice)
 {
 	return sys_fadvise64(fd, (u64)offset_high << 32 | offset_low, len,
 			     advice);
 }

 asmlinkage long compat_sys_add_key(const char __user *_type,
 			      const char __user *_description,
 			      const void __user *_payload,
 			      u32 plen,
 			      u32 ringid)
 {
 	return sys_add_key(_type, _description, _payload, plen, ringid);
 }

 asmlinkage long compat_sys_request_key(const char __user *_type,
 				  const char __user *_description,
 				  const char __user *_callout_info,
 				  u32 destringid)
 {
 	return sys_request_key(_type, _description, _callout_info, destringid);
 }

 asmlinkage long compat_sys_sync_file_range2(int fd, unsigned int flags,
 				   unsigned offset_hi, unsigned offset_lo,
 				   unsigned nbytes_hi, unsigned nbytes_lo)
 {
 	loff_t offset = ((loff_t)offset_hi << 32) | offset_lo;
 	loff_t nbytes = ((loff_t)nbytes_hi << 32) | nbytes_lo;

 	return sys_sync_file_range(fd, offset, nbytes, flags);
 }
	/*
	* 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/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 <linux/slab.h>

	#include <asm/ptrace.h>
	#include <asm/types.h>
	#include <asm/uaccess.h>
	#include <asm/unistd.h>
	#include <asm/time.h>
	#include <asm/mmu_context.h>
	#include <asm/ppc-pci.h>
	#include <asm/syscalls.h>


	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));
	}

	/* 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);
	}

	#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);

	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);
	}

	long compat_sys_truncate(const char __user * path, u32 length)
	{
	/* sign extend length */
	return sys_truncate(path, (int)length);
	}

	long compat_sys_ftruncate(int fd, u32 length)
	{
	/* sign extend length */
	return sys_ftruncate(fd, (int)length);
	}

	/* 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);
	}

	unsigned long compat_sys_mmap2(unsigned long addr, size_t len,
	unsigned long prot, unsigned long flags,
	unsigned long fd, unsigned long pgoff)
	{
	/* This should remain 12 even if PAGE_SIZE changes */
	return sys_mmap(addr, len, prot, flags, fd, pgoff << 12);
	}

	long compat_sys_tgkill(u32 tgid, u32 pid, int sig)
	{
	/* sign extend tgid, pid */
	return sys_tgkill((int)tgid, (int)pid, sig);
	}

	/*
	* long long munging:
	* The 32 bit ABI passes long longs in an odd even register pair.
	*/

	compat_ssize_t compat_sys_pread64(unsigned int fd, char __user *ubuf, compat_size_t count,
	u32 reg6, u32 poshi, u32 poslo)
	{
	return sys_pread64(fd, ubuf, count, ((loff_t)poshi << 32) \| poslo);
	}

	compat_ssize_t compat_sys_pwrite64(unsigned int fd, char __user *ubuf, compat_size_t count,
	u32 reg6, u32 poshi, u32 poslo)
	{
	return sys_pwrite64(fd, ubuf, count, ((loff_t)poshi << 32) \| poslo);
	}

	compat_ssize_t compat_sys_readahead(int fd, u32 r4, u32 offhi, u32 offlo, u32 count)
	{
	return sys_readahead(fd, ((loff_t)offhi << 32) \| offlo, count);
	}

	asmlinkage int compat_sys_truncate64(const char __user * path, u32 reg4,
	unsigned long high, unsigned long low)
	{
	return sys_truncate(path, (high << 32) \| low);
	}

	asmlinkage long compat_sys_fallocate(int fd, int mode, u32 offhi, u32 offlo,
	u32 lenhi, u32 lenlo)
	{
	return sys_fallocate(fd, mode, ((loff_t)offhi << 32) \| offlo,
	((loff_t)lenhi << 32) \| lenlo);
	}

	asmlinkage int compat_sys_ftruncate64(unsigned int fd, u32 reg4, unsigned long high,
	unsigned long low)
	{
	return sys_ftruncate(fd, (high << 32) \| low);
	}

	long ppc32_lookup_dcookie(u32 cookie_high, u32 cookie_low, char __user *buf,
	size_t len)
	{
	return sys_lookup_dcookie((u64)cookie_high << 32 \| cookie_low,
	buf, len);
	}

	long ppc32_fadvise64(int fd, u32 unused, u32 offset_high, u32 offset_low,
	size_t len, int advice)
	{
	return sys_fadvise64(fd, (u64)offset_high << 32 \| offset_low, len,
	advice);
	}

	asmlinkage long compat_sys_add_key(const char __user *_type,
	const char __user *_description,
	const void __user *_payload,
	u32 plen,
	u32 ringid)
	{
	return sys_add_key(_type, _description, _payload, plen, ringid);
	}

	asmlinkage long compat_sys_request_key(const char __user *_type,
	const char __user *_description,
	const char __user *_callout_info,
	u32 destringid)
	{
	return sys_request_key(_type, _description, _callout_info, destringid);
	}

	asmlinkage long compat_sys_sync_file_range2(int fd, unsigned int flags,
	unsigned offset_hi, unsigned offset_lo,
	unsigned nbytes_hi, unsigned nbytes_lo)
	{
	loff_t offset = ((loff_t)offset_hi << 32) \| offset_lo;
	loff_t nbytes = ((loff_t)nbytes_hi << 32) \| nbytes_lo;

	return sys_sync_file_range(fd, offset, nbytes, flags);
	}