sys_ppc32.c

来自「linux 内核源代码」· C语言 代码 · 共 829 行 · 第 1/2 页

/* 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];
};

asmlinkage long compat_sys_sysctl(struct __sysctl_args32 __user *args)
{
	struct __sysctl_args32 tmp;
	int error;
	size_t oldlen;
	size_t __user *oldlenp = NULL;
	unsigned long addr = (((unsigned long)&args->__unused[0]) + 7) & ~7;

	if (copy_from_user(&tmp, args, sizeof(tmp)))
		return -EFAULT;

	if (tmp.oldval && tmp.oldlenp) {
		/* Duh, this is ugly and might not work if sysctl_args
		   is in read-only memory, but do_sysctl does indirectly
		   a lot of uaccess in both directions and we'd have to
		   basically copy the whole sysctl.c here, and
		   glibc's __sysctl uses rw memory for the structure
		   anyway.  */
		oldlenp = (size_t __user *)addr;
		if (get_user(oldlen, (compat_size_t __user *)compat_ptr(tmp.oldlenp)) ||
		    put_user(oldlen, oldlenp))
			return -EFAULT;
	}

	lock_kernel();
	error = do_sysctl(compat_ptr(tmp.name), tmp.nlen,
			  compat_ptr(tmp.oldval), oldlenp,
			  compat_ptr(tmp.newval), tmp.newlen);
	unlock_kernel();
	if (oldlenp) {
		if (!error) {
			if (get_user(oldlen, oldlenp) ||
			    put_user(oldlen, (compat_size_t __user *)compat_ptr(tmp.oldlenp)))
				error = -EFAULT;
		}
		copy_to_user(args->__unused, tmp.__unused, sizeof(tmp.__unused));
	}
	return error;
}
#endif

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);
}