1 files changed, 605 insertions, 0 deletions

diff --git a/net/compat.c b/net/compat.c
new file mode 100644
index 0000000..be5d936
--- /dev/null
+++ b/net/compat.c
@@ -0,0 +1,605 @@
+/* 
+ * 32bit Socket syscall emulation. Based on arch/sparc64/kernel/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		Hewlett-Packard Co.
+ * Copyright (C) 2000		David Mosberger-Tang <davidm@hpl.hp.com>
+ * Copyright (C) 2000,2001	Andi Kleen, SuSE Labs 
+ */
+
+#include <linux/kernel.h>
+#include <linux/fs.h>
+#include <linux/sched.h>
+#include <linux/types.h>
+#include <linux/file.h>
+#include <linux/icmpv6.h>
+#include <linux/socket.h>
+#include <linux/syscalls.h>
+#include <linux/filter.h>
+#include <linux/compat.h>
+#include <linux/netfilter_ipv4/ip_tables.h>
+#include <linux/security.h>
+
+#include <net/scm.h>
+#include <net/sock.h>
+#include <asm/uaccess.h>
+#include <net/compat.h>
+
+static inline int iov_from_user_compat_to_kern(struct iovec *kiov,
+					  struct compat_iovec __user *uiov32,
+					  int niov)
+{
+	int tot_len = 0;
+
+	while(niov > 0) {
+		compat_uptr_t buf;
+		compat_size_t len;
+
+		if(get_user(len, &uiov32->iov_len) ||
+		   get_user(buf, &uiov32->iov_base)) {
+			tot_len = -EFAULT;
+			break;
+		}
+		tot_len += len;
+		kiov->iov_base = compat_ptr(buf);
+		kiov->iov_len = (__kernel_size_t) len;
+		uiov32++;
+		kiov++;
+		niov--;
+	}
+	return tot_len;
+}
+
+int get_compat_msghdr(struct msghdr *kmsg, struct compat_msghdr __user *umsg)
+{
+	compat_uptr_t tmp1, tmp2, tmp3;
+
+	if (!access_ok(VERIFY_READ, umsg, sizeof(*umsg)) ||
+	    __get_user(tmp1, &umsg->msg_name) ||
+	    __get_user(kmsg->msg_namelen, &umsg->msg_namelen) ||
+	    __get_user(tmp2, &umsg->msg_iov) ||
+	    __get_user(kmsg->msg_iovlen, &umsg->msg_iovlen) ||
+	    __get_user(tmp3, &umsg->msg_control) ||
+	    __get_user(kmsg->msg_controllen, &umsg->msg_controllen) ||
+	    __get_user(kmsg->msg_flags, &umsg->msg_flags))
+		return -EFAULT;
+	kmsg->msg_name = compat_ptr(tmp1);
+	kmsg->msg_iov = compat_ptr(tmp2);
+	kmsg->msg_control = compat_ptr(tmp3);
+	return 0;
+}
+
+/* I've named the args so it is easy to tell whose space the pointers are in. */
+int verify_compat_iovec(struct msghdr *kern_msg, struct iovec *kern_iov,
+		   char *kern_address, int mode)
+{
+	int tot_len;
+
+	if(kern_msg->msg_namelen) {
+		if(mode==VERIFY_READ) {
+			int err = move_addr_to_kernel(kern_msg->msg_name,
+						      kern_msg->msg_namelen,
+						      kern_address);
+			if(err < 0)
+				return err;
+		}
+		kern_msg->msg_name = kern_address;
+	} else
+		kern_msg->msg_name = NULL;
+
+	if(kern_msg->msg_iovlen > UIO_FASTIOV) {
+		kern_iov = kmalloc(kern_msg->msg_iovlen * sizeof(struct iovec),
+				   GFP_KERNEL);
+		if(!kern_iov)
+			return -ENOMEM;
+	}
+
+	tot_len = iov_from_user_compat_to_kern(kern_iov,
+					  (struct compat_iovec __user *)kern_msg->msg_iov,
+					  kern_msg->msg_iovlen);
+	if(tot_len >= 0)
+		kern_msg->msg_iov = kern_iov;
+	else if(kern_msg->msg_iovlen > UIO_FASTIOV)
+		kfree(kern_iov);
+
+	return tot_len;
+}
+
+/* Bleech... */
+#define CMSG_COMPAT_ALIGN(len)	ALIGN((len), sizeof(s32))
+
+#define CMSG_COMPAT_DATA(cmsg)				\
+	((void __user *)((char __user *)(cmsg) + CMSG_COMPAT_ALIGN(sizeof(struct compat_cmsghdr))))
+#define CMSG_COMPAT_SPACE(len)				\
+	(CMSG_COMPAT_ALIGN(sizeof(struct compat_cmsghdr)) + CMSG_COMPAT_ALIGN(len))
+#define CMSG_COMPAT_LEN(len)				\
+	(CMSG_COMPAT_ALIGN(sizeof(struct compat_cmsghdr)) + (len))
+
+#define CMSG_COMPAT_FIRSTHDR(msg)			\
+	(((msg)->msg_controllen) >= sizeof(struct compat_cmsghdr) ?	\
+	 (struct compat_cmsghdr __user *)((msg)->msg_control) :		\
+	 (struct compat_cmsghdr __user *)NULL)
+
+#define CMSG_COMPAT_OK(ucmlen, ucmsg, mhdr) \
+	((ucmlen) >= sizeof(struct compat_cmsghdr) && \
+	 (ucmlen) <= (unsigned long) \
+	 ((mhdr)->msg_controllen - \
+	  ((char *)(ucmsg) - (char *)(mhdr)->msg_control)))
+
+static inline struct compat_cmsghdr __user *cmsg_compat_nxthdr(struct msghdr *msg,
+		struct compat_cmsghdr __user *cmsg, int cmsg_len)
+{
+	char __user *ptr = (char __user *)cmsg + CMSG_COMPAT_ALIGN(cmsg_len);
+	if ((unsigned long)(ptr + 1 - (char __user *)msg->msg_control) >
+			msg->msg_controllen)
+		return NULL;
+	return (struct compat_cmsghdr __user *)ptr;
+}
+
+/* There is a lot of hair here because the alignment rules (and
+ * thus placement) of cmsg headers and length are different for
+ * 32-bit apps.  -DaveM
+ */
+int cmsghdr_from_user_compat_to_kern(struct msghdr *kmsg,
+			       unsigned char *stackbuf, int stackbuf_size)
+{
+	struct compat_cmsghdr __user *ucmsg;
+	struct cmsghdr *kcmsg, *kcmsg_base;
+	compat_size_t ucmlen;
+	__kernel_size_t kcmlen, tmp;
+
+	kcmlen = 0;
+	kcmsg_base = kcmsg = (struct cmsghdr *)stackbuf;
+	ucmsg = CMSG_COMPAT_FIRSTHDR(kmsg);
+	while(ucmsg != NULL) {
+		if(get_user(ucmlen, &ucmsg->cmsg_len))
+			return -EFAULT;
+
+		/* Catch bogons. */
+		if (!CMSG_COMPAT_OK(ucmlen, ucmsg, kmsg))
+			return -EINVAL;
+
+		tmp = ((ucmlen - CMSG_COMPAT_ALIGN(sizeof(*ucmsg))) +
+		       CMSG_ALIGN(sizeof(struct cmsghdr)));
+		kcmlen += tmp;
+		ucmsg = cmsg_compat_nxthdr(kmsg, ucmsg, ucmlen);
+	}
+	if(kcmlen == 0)
+		return -EINVAL;
+
+	/* The kcmlen holds the 64-bit version of the control length.
+	 * It may not be modified as we do not stick it into the kmsg
+	 * until we have successfully copied over all of the data
+	 * from the user.
+	 */
+	if(kcmlen > stackbuf_size)
+		kcmsg_base = kcmsg = kmalloc(kcmlen, GFP_KERNEL);
+	if(kcmsg == NULL)
+		return -ENOBUFS;
+
+	/* Now copy them over neatly. */
+	memset(kcmsg, 0, kcmlen);
+	ucmsg = CMSG_COMPAT_FIRSTHDR(kmsg);
+	while(ucmsg != NULL) {
+		__get_user(ucmlen, &ucmsg->cmsg_len);
+		tmp = ((ucmlen - CMSG_COMPAT_ALIGN(sizeof(*ucmsg))) +
+		       CMSG_ALIGN(sizeof(struct cmsghdr)));
+		kcmsg->cmsg_len = tmp;
+		__get_user(kcmsg->cmsg_level, &ucmsg->cmsg_level);
+		__get_user(kcmsg->cmsg_type, &ucmsg->cmsg_type);
+
+		/* Copy over the data. */
+		if(copy_from_user(CMSG_DATA(kcmsg),
+				  CMSG_COMPAT_DATA(ucmsg),
+				  (ucmlen - CMSG_COMPAT_ALIGN(sizeof(*ucmsg)))))
+			goto out_free_efault;
+
+		/* Advance. */
+		kcmsg = (struct cmsghdr *)((char *)kcmsg + CMSG_ALIGN(tmp));
+		ucmsg = cmsg_compat_nxthdr(kmsg, ucmsg, ucmlen);
+	}
+
+	/* Ok, looks like we made it.  Hook it up and return success. */
+	kmsg->msg_control = kcmsg_base;
+	kmsg->msg_controllen = kcmlen;
+	return 0;
+
+out_free_efault:
+	if(kcmsg_base != (struct cmsghdr *)stackbuf)
+		kfree(kcmsg_base);
+	return -EFAULT;
+}
+
+int put_cmsg_compat(struct msghdr *kmsg, int level, int type, int len, void *data)
+{
+	struct compat_timeval ctv;
+	struct compat_cmsghdr __user *cm = (struct compat_cmsghdr __user *) kmsg->msg_control;
+	struct compat_cmsghdr cmhdr;
+	int cmlen;
+
+	if(cm == NULL || kmsg->msg_controllen < sizeof(*cm)) {
+		kmsg->msg_flags |= MSG_CTRUNC;
+		return 0; /* XXX: return error? check spec. */
+	}
+
+	if (level == SOL_SOCKET && type == SO_TIMESTAMP) { 
+		struct timeval *tv = (struct timeval *)data;
+		ctv.tv_sec = tv->tv_sec;
+		ctv.tv_usec = tv->tv_usec;
+		data = &ctv;
+		len = sizeof(struct compat_timeval);
+	} 
+	
+	cmlen = CMSG_COMPAT_LEN(len);
+	if(kmsg->msg_controllen < cmlen) {
+		kmsg->msg_flags |= MSG_CTRUNC;
+		cmlen = kmsg->msg_controllen;
+	}
+	cmhdr.cmsg_level = level;
+	cmhdr.cmsg_type = type;
+	cmhdr.cmsg_len = cmlen;
+
+	if(copy_to_user(cm, &cmhdr, sizeof cmhdr))
+		return -EFAULT;
+	if(copy_to_user(CMSG_COMPAT_DATA(cm), data, cmlen - sizeof(struct compat_cmsghdr)))
+		return -EFAULT;
+	cmlen = CMSG_COMPAT_SPACE(len);
+	kmsg->msg_control += cmlen;
+	kmsg->msg_controllen -= cmlen;
+	return 0;
+}
+
+void scm_detach_fds_compat(struct msghdr *kmsg, struct scm_cookie *scm)
+{
+	struct compat_cmsghdr __user *cm = (struct compat_cmsghdr __user *) kmsg->msg_control;
+	int fdmax = (kmsg->msg_controllen - sizeof(struct compat_cmsghdr)) / sizeof(int);
+	int fdnum = scm->fp->count;
+	struct file **fp = scm->fp->fp;
+	int __user *cmfptr;
+	int err = 0, i;
+
+	if (fdnum < fdmax)
+		fdmax = fdnum;
+
+	for (i = 0, cmfptr = (int __user *) CMSG_COMPAT_DATA(cm); i < fdmax; i++, cmfptr++) {
+		int new_fd;
+		err = security_file_receive(fp[i]);
+		if (err)
+			break;
+		err = get_unused_fd();
+		if (err < 0)
+			break;
+		new_fd = err;
+		err = put_user(new_fd, cmfptr);
+		if (err) {
+			put_unused_fd(new_fd);
+			break;
+		}
+		/* Bump the usage count and install the file. */
+		get_file(fp[i]);
+		fd_install(new_fd, fp[i]);
+	}
+
+	if (i > 0) {
+		int cmlen = CMSG_COMPAT_LEN(i * sizeof(int));
+		if (!err)
+			err = put_user(SOL_SOCKET, &cm->cmsg_level);
+		if (!err)
+			err = put_user(SCM_RIGHTS, &cm->cmsg_type);
+		if (!err)
+			err = put_user(cmlen, &cm->cmsg_len);
+		if (!err) {
+			cmlen = CMSG_COMPAT_SPACE(i * sizeof(int));
+			kmsg->msg_control += cmlen;
+			kmsg->msg_controllen -= cmlen;
+		}
+	}
+	if (i < fdnum)
+		kmsg->msg_flags |= MSG_CTRUNC;
+
+	/*
+	 * All of the files that fit in the message have had their
+	 * usage counts incremented, so we just free the list.
+	 */
+	__scm_destroy(scm);
+}
+
+/*
+ * For now, we assume that the compatibility and native version
+ * of struct ipt_entry are the same - sfr.  FIXME
+ */
+struct compat_ipt_replace {
+	char			name[IPT_TABLE_MAXNAMELEN];
+	u32			valid_hooks;
+	u32			num_entries;
+	u32			size;
+	u32			hook_entry[NF_IP_NUMHOOKS];
+	u32			underflow[NF_IP_NUMHOOKS];
+	u32			num_counters;
+	compat_uptr_t		counters;	/* struct ipt_counters * */
+	struct ipt_entry	entries[0];
+};
+
+static int do_netfilter_replace(int fd, int level, int optname,
+				char __user *optval, int optlen)
+{
+	struct compat_ipt_replace __user *urepl;
+	struct ipt_replace __user *repl_nat;
+	char name[IPT_TABLE_MAXNAMELEN];
+	u32 origsize, tmp32, num_counters;
+	unsigned int repl_nat_size;
+	int ret;
+	int i;
+	compat_uptr_t ucntrs;
+
+	urepl = (struct compat_ipt_replace __user *)optval;
+	if (get_user(origsize, &urepl->size))
+		return -EFAULT;
+
+	/* Hack: Causes ipchains to give correct error msg --RR */
+	if (optlen != sizeof(*urepl) + origsize)
+		return -ENOPROTOOPT;
+
+	/* XXX Assumes that size of ipt_entry is the same both in
+	 *     native and compat environments.
+	 */
+	repl_nat_size = sizeof(*repl_nat) + origsize;
+	repl_nat = compat_alloc_user_space(repl_nat_size);
+
+	ret = -EFAULT;
+	if (put_user(origsize, &repl_nat->size))
+		goto out;
+
+	if (!access_ok(VERIFY_READ, urepl, optlen) ||
+	    !access_ok(VERIFY_WRITE, repl_nat, optlen))
+		goto out;
+
+	if (__copy_from_user(name, urepl->name, sizeof(urepl->name)) ||
+	    __copy_to_user(repl_nat->name, name, sizeof(repl_nat->name)))
+		goto out;
+
+	if (__get_user(tmp32, &urepl->valid_hooks) ||
+	    __put_user(tmp32, &repl_nat->valid_hooks))
+		goto out;
+
+	if (__get_user(tmp32, &urepl->num_entries) ||
+	    __put_user(tmp32, &repl_nat->num_entries))
+		goto out;
+
+	if (__get_user(num_counters, &urepl->num_counters) ||
+	    __put_user(num_counters, &repl_nat->num_counters))
+		goto out;
+
+	if (__get_user(ucntrs, &urepl->counters) ||
+	    __put_user(compat_ptr(ucntrs), &repl_nat->counters))
+		goto out;
+
+	if (__copy_in_user(&repl_nat->entries[0],
+			   &urepl->entries[0],
+			   origsize))
+		goto out;
+
+	for (i = 0; i < NF_IP_NUMHOOKS; i++) {
+		if (__get_user(tmp32, &urepl->hook_entry[i]) ||
+		    __put_user(tmp32, &repl_nat->hook_entry[i]) ||
+		    __get_user(tmp32, &urepl->underflow[i]) ||
+		    __put_user(tmp32, &repl_nat->underflow[i]))
+			goto out;
+	}
+
+	/*
+	 * Since struct ipt_counters just contains two u_int64_t members
+	 * we can just do the access_ok check here and pass the (converted)
+	 * pointer into the standard syscall.  We hope that the pointer is
+	 * not misaligned ...
+	 */
+	if (!access_ok(VERIFY_WRITE, compat_ptr(ucntrs),
+		       num_counters * sizeof(struct ipt_counters)))
+		goto out;
+
+
+	ret = sys_setsockopt(fd, level, optname,
+			     (char __user *)repl_nat, repl_nat_size);
+
+out:
+	return ret;
+}
+
+/*
+ * A struct sock_filter is architecture independent.
+ */
+struct compat_sock_fprog {
+	u16		len;
+	compat_uptr_t	filter;		/* struct sock_filter * */
+};
+
+static int do_set_attach_filter(int fd, int level, int optname,
+				char __user *optval, int optlen)
+{
+	struct compat_sock_fprog __user *fprog32 = (struct compat_sock_fprog __user *)optval;
+	struct sock_fprog __user *kfprog = compat_alloc_user_space(sizeof(struct sock_fprog)); 
+	compat_uptr_t ptr;
+	u16 len;
+
+	if (!access_ok(VERIFY_READ, fprog32, sizeof(*fprog32)) ||
+	    !access_ok(VERIFY_WRITE, kfprog, sizeof(struct sock_fprog)) ||
+	    __get_user(len, &fprog32->len) ||
+	    __get_user(ptr, &fprog32->filter) ||
+	    __put_user(len, &kfprog->len) ||
+	    __put_user(compat_ptr(ptr), &kfprog->filter))
+		return -EFAULT;
+
+	return sys_setsockopt(fd, level, optname, (char __user *)kfprog, 
+			      sizeof(struct sock_fprog));
+}
+
+static int do_set_sock_timeout(int fd, int level, int optname, char __user *optval, int optlen)
+{
+	struct compat_timeval __user *up = (struct compat_timeval __user *) optval;
+	struct timeval ktime;
+	mm_segment_t old_fs;
+	int err;
+
+	if (optlen < sizeof(*up))
+		return -EINVAL;
+	if (!access_ok(VERIFY_READ, up, sizeof(*up)) ||
+	    __get_user(ktime.tv_sec, &up->tv_sec) ||
+	    __get_user(ktime.tv_usec, &up->tv_usec))
+		return -EFAULT;
+	old_fs = get_fs();
+	set_fs(KERNEL_DS);
+	err = sys_setsockopt(fd, level, optname, (char *) &ktime, sizeof(ktime));
+	set_fs(old_fs);
+
+	return err;
+}
+
+asmlinkage long compat_sys_setsockopt(int fd, int level, int optname,
+				char __user *optval, int optlen)
+{
+	/* SO_SET_REPLACE seems to be the same in all levels */
+	if (optname == IPT_SO_SET_REPLACE)
+		return do_netfilter_replace(fd, level, optname,
+					    optval, optlen);
+	if (level == SOL_SOCKET && optname == SO_ATTACH_FILTER)
+		return do_set_attach_filter(fd, level, optname,
+					    optval, optlen);
+	if (level == SOL_SOCKET &&
+	    (optname == SO_RCVTIMEO || optname == SO_SNDTIMEO))
+		return do_set_sock_timeout(fd, level, optname, optval, optlen);
+
+	return sys_setsockopt(fd, level, optname, optval, optlen);
+}
+
+static int do_get_sock_timeout(int fd, int level, int optname,
+		char __user *optval, int __user *optlen)
+{
+	struct compat_timeval __user *up;
+	struct timeval ktime;
+	mm_segment_t old_fs;
+	int len, err;
+
+	up = (struct compat_timeval __user *) optval;
+	if (get_user(len, optlen))
+		return -EFAULT;
+	if (len < sizeof(*up))
+		return -EINVAL;
+	len = sizeof(ktime);
+	old_fs = get_fs();
+	set_fs(KERNEL_DS);
+	err = sys_getsockopt(fd, level, optname, (char *) &ktime, &len);
+	set_fs(old_fs);
+
+	if (!err) {
+		if (put_user(sizeof(*up), optlen) ||
+		    !access_ok(VERIFY_WRITE, up, sizeof(*up)) ||
+		    __put_user(ktime.tv_sec, &up->tv_sec) ||
+		    __put_user(ktime.tv_usec, &up->tv_usec))
+			err = -EFAULT;
+	}
+	return err;
+}
+
+asmlinkage long compat_sys_getsockopt(int fd, int level, int optname,
+				char __user *optval, int __user *optlen)
+{
+	if (level == SOL_SOCKET &&
+	    (optname == SO_RCVTIMEO || optname == SO_SNDTIMEO))
+		return do_get_sock_timeout(fd, level, optname, optval, optlen);
+	return sys_getsockopt(fd, level, optname, optval, optlen);
+}
+
+/* Argument list sizes for compat_sys_socketcall */
+#define AL(x) ((x) * sizeof(u32))
+static unsigned char nas[18]={AL(0),AL(3),AL(3),AL(3),AL(2),AL(3),
+				AL(3),AL(3),AL(4),AL(4),AL(4),AL(6),
+				AL(6),AL(2),AL(5),AL(5),AL(3),AL(3)};
+#undef AL
+
+asmlinkage long compat_sys_sendmsg(int fd, struct compat_msghdr __user *msg, unsigned flags)
+{
+	return sys_sendmsg(fd, (struct msghdr __user *)msg, flags | MSG_CMSG_COMPAT);
+}
+
+asmlinkage long compat_sys_recvmsg(int fd, struct compat_msghdr __user *msg, unsigned int flags)
+{
+	return sys_recvmsg(fd, (struct msghdr __user *)msg, flags | MSG_CMSG_COMPAT);
+}
+
+asmlinkage long compat_sys_socketcall(int call, u32 __user *args)
+{
+	int ret;
+	u32 a[6];
+	u32 a0, a1;
+				 
+	if (call < SYS_SOCKET || call > SYS_RECVMSG)
+		return -EINVAL;
+	if (copy_from_user(a, args, nas[call]))
+		return -EFAULT;
+	a0 = a[0];
+	a1 = a[1];
+	
+	switch(call) {
+	case SYS_SOCKET:
+		ret = sys_socket(a0, a1, a[2]);
+		break;
+	case SYS_BIND:
+		ret = sys_bind(a0, compat_ptr(a1), a[2]);
+		break;
+	case SYS_CONNECT:
+		ret = sys_connect(a0, compat_ptr(a1), a[2]);
+		break;
+	case SYS_LISTEN:
+		ret = sys_listen(a0, a1);
+		break;
+	case SYS_ACCEPT:
+		ret = sys_accept(a0, compat_ptr(a1), compat_ptr(a[2]));
+		break;
+	case SYS_GETSOCKNAME:
+		ret = sys_getsockname(a0, compat_ptr(a1), compat_ptr(a[2]));
+		break;
+	case SYS_GETPEERNAME:
+		ret = sys_getpeername(a0, compat_ptr(a1), compat_ptr(a[2]));
+		break;
+	case SYS_SOCKETPAIR:
+		ret = sys_socketpair(a0, a1, a[2], compat_ptr(a[3]));
+		break;
+	case SYS_SEND:
+		ret = sys_send(a0, compat_ptr(a1), a[2], a[3]);
+		break;
+	case SYS_SENDTO:
+		ret = sys_sendto(a0, compat_ptr(a1), a[2], a[3], compat_ptr(a[4]), a[5]);
+		break;
+	case SYS_RECV:
+		ret = sys_recv(a0, compat_ptr(a1), a[2], a[3]);
+		break;
+	case SYS_RECVFROM:
+		ret = sys_recvfrom(a0, compat_ptr(a1), a[2], a[3], compat_ptr(a[4]), compat_ptr(a[5]));
+		break;
+	case SYS_SHUTDOWN:
+		ret = sys_shutdown(a0,a1);
+		break;
+	case SYS_SETSOCKOPT:
+		ret = compat_sys_setsockopt(a0, a1, a[2],
+				compat_ptr(a[3]), a[4]);
+		break;
+	case SYS_GETSOCKOPT:
+		ret = compat_sys_getsockopt(a0, a1, a[2],
+				compat_ptr(a[3]), compat_ptr(a[4]));
+		break;
+	case SYS_SENDMSG:
+		ret = compat_sys_sendmsg(a0, compat_ptr(a1), a[2]);
+		break;
+	case SYS_RECVMSG:
+		ret = compat_sys_recvmsg(a0, compat_ptr(a1), a[2]);
+		break;
+	default:
+		ret = -EINVAL;
+		break;
+	}
+	return ret;
+}