Merge branch 'lukas/ose/master-17.0/OTP-11334'

* lukas/ose/master-17.0/OTP-11334:
  ose: Fix erts assert failed printouts
  ose: fix for packet_bytes in fd/spawn driver.
  ose: Prepare slave for running on OSE
  ose: Fix bug when hunting for signal proxy
  ose: Implement tcp inet driver for OSE
  ose: Add ifdefs for HAVE_UDP
  ose: Yielding has to be done differently for background processes.
  ose: Print faults in aio sys driver calls
  ose: Prinout errno when to_erl read fails
  ose: erlang display goes to ramlog printf
  ose: Initiate stdin/stdout/stderr
  ose: Break lmconf into one per load module
  ose: Reset busy port when pdq empty
  ose: Restore the owner of the signal

15 files changed, 823 insertions, 195 deletions

diff --git a/erts/aclocal.m4 b/erts/aclocal.m4
index c51c26794a..2b47f7c4bc 100644
--- a/erts/aclocal.m4
+++ b/erts/aclocal.m4
@@ -83,8 +83,10 @@ AC_ARG_VAR(erl_xcomp_ose_LM_POST_LINK, [OSE postlink tool (only used when cross
 AC_ARG_VAR(erl_xcomp_ose_LM_SET_CONF, [Sets the configuration for an OSE load module (only used when cross compiling for OSE)])
 AC_ARG_VAR(erl_xcomp_ose_LM_ELF_SIZE, [Prints the section size information for an OSE load module (only used when cross compiling for OSE)])
 AC_ARG_VAR(erl_xcomp_ose_LM_LCF, [OSE load module linker configuration file (only used when cross compiling for OSE)])
-AC_ARG_VAR(erl_xcomp_ose_LM_CONF, [OSE load module default configuration file (only used when cross compiling for OSE)])
-AC_ARG_VAR(erl_xcomp_ose_CONFD, [OSE OSE confd source file])
+AC_ARG_VAR(erl_xcomp_ose_BEAM_LM_CONF, [BEAM OSE load module default configuration file (only used when cross compiling for OSE)])
+AC_ARG_VAR(erl_xcomp_ose_EPMD_LM_CONF, [EPMD OSE load module default configuration file (only used when cross compiling for OSE)])
+AC_ARG_VAR(erl_xcomp_ose_RUN_ERL_LM_CONF, [run_erl_lm OSE load module default configuration file (only used when cross compiling for OSE)])
+AC_ARG_VAR(erl_xcomp_ose_CONFD, [OSE confd source file])
 AC_ARG_VAR(erl_xcomp_ose_CRT0_LM, [OSE crt0 lm source file])
 
 ])
diff --git a/erts/doc/src/erlang.xml b/erts/doc/src/erlang.xml
index b06d5aeb12..7aaded200c 100644
--- a/erts/doc/src/erlang.xml
+++ b/erts/doc/src/erlang.xml
@@ -887,7 +887,7 @@
       <fsummary>Print a term on standard output</fsummary>
       <desc>
         <p>Prints a text representation of <c><anno>Term</anno></c> on the standard
-          output.</p>
+          output. On OSE the term is printed to the ramlog.</p>
         <warning>
           <p>This BIF is intended for debugging only.</p>
         </warning>
diff --git a/erts/emulator/Makefile.in b/erts/emulator/Makefile.in
index 58e77ed1fa..58639c7190 100644
--- a/erts/emulator/Makefile.in
+++ b/erts/emulator/Makefile.in
@@ -1035,7 +1035,7 @@ else
 ifeq ($(findstring ose,$(TARGET)),ose)
 $(BINDIR)/$(EMULATOR_EXECUTABLE): $(INIT_OBJS) $(OBJS) $(DEPLIBS) $(LCF)
 	$(call build-ose-load-module, $@, $(INIT_OBJS) $(OBJS), $(STATIC_NIF_LIBS) \
-	$(STATIC_DRIVER_LIBS) $(LIBS), $(LMCONF))
+	$(STATIC_DRIVER_LIBS) $(LIBS), $(BEAM_LMCONF))
 
 else
 $(BINDIR)/$(EMULATOR_EXECUTABLE): $(INIT_OBJS) $(OBJS) $(DEPLIBS)
diff --git a/erts/emulator/drivers/common/inet_drv.c b/erts/emulator/drivers/common/inet_drv.c
index 357a4b7bcb..e33594b026 100644
--- a/erts/emulator/drivers/common/inet_drv.c
+++ b/erts/emulator/drivers/common/inet_drv.c
@@ -93,6 +93,10 @@ typedef unsigned long long llu_t;
 #define INT16_MAX (32767)
 #endif
 
+#ifdef __OSE__
+#include "inet.h"
+#endif
+
 #ifdef __WIN32__
 #define  STRNCASECMP strncasecmp
 
@@ -121,10 +125,6 @@ typedef unsigned long long llu_t;
 #undef WANT_NONBLOCKING
 #include "sys.h"
 
-#ifdef __OSE__
-#include "inet.h"
-#endif
-
 #undef EWOULDBLOCK
 #undef ETIMEDOUT
 
@@ -200,6 +200,7 @@ typedef unsigned long long llu_t;
 
 
 #define HAVE_MULTICAST_SUPPORT
+#define HAVE_UDP
 
 #define ERRNO_BLOCK             WSAEWOULDBLOCK
 
@@ -294,29 +295,55 @@ static unsigned long zero_value = 0;
 static unsigned long one_value = 1;
 
 #elif defined (__OSE__)
+
+/*
+ * Some notes about how inet (currently only tcp) works on OSE.
+ * The driver uses OSE signals to communicate with the one_inet
+ * process. Because of the difference in how signals and file descriptors
+ * work the whole select/deselect mechanic is very different.
+ * In ose when a sock_select is done a function is called. That function
+ * notes the changes that the driver want to do, but does not act on it.
+ * later when the function returns the new desired state is compared
+ * to the previous state and the apprioriate actions are taken. The action
+ * is usually to either request more data from the stack or stop requesting
+ * data.
+ *
+ * One thing to note is that the driver never does select/deselect. It always
+ * listens for the signals. Flow of data is regulated by sending or not sending
+ * signals to the ose inet process.
+ *
+ * The interesting functions to look at are:
+ *  * inet_driver_select : called when sock_select is called
+ *  * tcp_inet_ose_dispatch_signal : checks state changes and sends new signals
+ *  * tcp_inet_drv_output_ose : ready output callback, reads signals and calls
+ *                              dispatch_signal
+ *  * tcp_inet_drv_input_ose : ready input callback.
+ */
+
+#include "efs.h"
 #include "sys/socket.h"
 #include "sys/uio.h"
 #include "sfk/sys/sfk_uio.h"
 #include "netinet/in.h"
 #include "netinet/tcp.h"
 #include "netdb.h"
+#include "ose_spi/socket.sig"
 
-ssize_t writev(int fd, const struct iovec *iov, int iovcnt)
-{
-   return 0;
-}
+
+static ssize_t writev_fallback(int fd, const struct iovec *iov, int iovcnt, int max_sz);
 
 #define INVALID_SOCKET -1
 #define INVALID_EVENT  -1
 #define SOCKET_ERROR   -1
 
 #define SOCKET int
-#define HANDLE long int
-#define FD_READ    ERL_DRV_READ
-#define FD_WRITE   ERL_DRV_WRITE
-#define FD_CLOSE   0
-#define FD_CONNECT ERL_DRV_WRITE
-#define FD_ACCEPT  ERL_DRV_READ
+#define HANDLE int
+#define FD_READ         ERL_DRV_READ
+#define FD_WRITE        ERL_DRV_WRITE
+#define FD_CLOSE        0
+#define FD_CONNECT      (1<<4)
+#define FD_ACCEPT       (1<<5)
+#define SOCK_FD_ERROR   (1<<6)
 
 #define sock_connect(s, addr, len)  connect((s), (addr), (len))
 #define sock_listen(s, b)           listen((s), (b))
@@ -335,11 +362,12 @@ ssize_t writev(int fd, const struct iovec *iov, int iovcnt)
 #define sock_sendto(s,buf,blen,flag,addr,alen) \
                 sendto((s),(buf),(blen),(flag),(addr),(alen))
 #define sock_sendv(s, vec, size, np, flag) \
-		(*(np) = writev((s), (struct iovec*)(vec), (size)))
+		(*(np) = writev_fallback((s), (struct iovec*)(vec), (size), (*(np))))
 #define sock_sendmsg(s,msghdr,flag) sendmsg((s),(msghdr),(flag))
 
 #define sock_open(af, type, proto)  socket((af), (type), (proto))
 #define sock_close(s)               close((s))
+#define sock_dup(s)                 dup((s))
 #define sock_shutdown(s, how)       shutdown((s), (how))
 
 #define sock_hostname(buf, len)     gethostname((buf), (len))
@@ -355,19 +383,6 @@ ssize_t writev(int fd, const struct iovec *iov, int iovcnt)
 #define sock_create_event(d)        ((d)->s) /* return file descriptor */
 #define sock_close_event(e)                  /* do nothing */
 
-#define inet_driver_select(port, e, mode, on) \
-                                    driver_select(port, e, mode | (on?ERL_DRV_USE:0), on)
-
-#define sock_select(d, flags, onoff) do { \
-        ASSERT(!(d)->is_ignored); \
-        (d)->event_mask = (onoff) ? \
-                 ((d)->event_mask | (flags)) : \
-                 ((d)->event_mask & ~(flags)); \
-        DEBUGF(("sock_select(%ld): flags=%02X, onoff=%d, event_mask=%02lX\r\n", \
-		(long) (d)->port, (flags), (onoff), (unsigned long) (d)->event_mask)); \
-        inet_driver_select((d)->port, (ErlDrvEvent)(long)(d)->event, (flags), (onoff)); \
-   } while(0)
-
 #ifndef WANT_NONBLOCKING
 #define WANT_NONBLOCKING
 #endif
@@ -397,6 +412,16 @@ typedef unsigned long  u_long;
 #define  IN_EXPERIMENTAL(a)   ((((in_addr_t)(a)) & 0xe0000000) == 0xe0000000)
 #define  IN_BADCLASS(a)    ((((in_addr_t)(a)) & 0xf0000000) == 0xf0000000)
 
+#define sock_select(d, flags, onoff) do { \
+        ASSERT(!(d)->is_ignored); \
+        (d)->event_mask = (onoff) ? \
+                 ((d)->event_mask | (flags)) : \
+                 ((d)->event_mask & ~(flags)); \
+        DEBUGF(("(%s / %d) sock_select(%ld): flags=%02X, onoff=%d, event_mask=%02lX, s=%d\r\n", \
+		__FILE__, __LINE__, (long) (d)->port, (flags), (onoff), (unsigned long) (d)->event_mask, (d)->s)); \
+        inet_driver_select((d), (flags), (onoff)); \
+   } while(0)
+
 #else /* !__OSE__ && !__WIN32__ */
 
 #include <sys/time.h>
@@ -438,6 +463,8 @@ typedef unsigned long  u_long;
 #include <setns.h>
 #endif
 
+#define HAVE_UDP
+
 /* SCTP support -- currently for UNIX platforms only: */
 #undef HAVE_SCTP
 #if defined(HAVE_SCTP_H)
@@ -660,13 +687,13 @@ static int my_strncasecmp(const char *s1, const char *s2, size_t n)
         (d)->event_mask = (onoff) ? \
                  ((d)->event_mask | (flags)) : \
                  ((d)->event_mask & ~(flags)); \
-        DEBUGF(("sock_select(%ld): flags=%02X, onoff=%d, event_mask=%02lX\r\n", \
-		(long) (d)->port, (flags), (onoff), (unsigned long) (d)->event_mask)); \
+        DEBUGF(("(%s / %d) sock_select(%ld): flags=%02X, onoff=%d, event_mask=%02lX\r\n", \
+		__FILE__, __LINE__, (long) (d)->port, (flags), (onoff), (unsigned long) (d)->event_mask)); \
         inet_driver_select((d)->port, (ErlDrvEvent)(long)(d)->event, (flags), (onoff)); \
    } while(0)
 
 
-#endif /* #ifdef __WIN32__    #else */
+#endif /* !__WIN32__ && !__OSE__ */
 
 #ifdef HAVE_SOCKLEN_T
 #  define SOCKLEN_T socklen_t
@@ -1119,6 +1146,13 @@ typedef struct {
     char *netns;                /* Socket network namespace name
 				   as full file path */
 #endif
+#ifdef __OSE__
+    int select_state;           /* state to keep track of whether we
+				   should trigger another read/write
+				   request at end of ready_input/output */
+    ErlDrvEvent events[6];
+#endif
+
 } inet_descriptor;
 
 
@@ -1134,8 +1168,10 @@ static void tcp_inet_stop(ErlDrvData);
 static void tcp_inet_command(ErlDrvData, char*, ErlDrvSizeT);
 static void tcp_inet_commandv(ErlDrvData, ErlIOVec*);
 static void tcp_inet_flush(ErlDrvData drv_data);
+#ifndef __OSE__
 static void tcp_inet_drv_input(ErlDrvData, ErlDrvEvent);
 static void tcp_inet_drv_output(ErlDrvData data, ErlDrvEvent event);
+#endif
 static ErlDrvData tcp_inet_start(ErlDrvPort, char* command);
 static ErlDrvSSizeT tcp_inet_ctl(ErlDrvData, unsigned int,
 				 char*, ErlDrvSizeT, char**, ErlDrvSizeT);
@@ -1147,7 +1183,72 @@ static void tcp_inet_event(ErlDrvData, ErlDrvEvent);
 static void find_dynamic_functions(void);
 #endif
 
-static struct erl_drv_entry tcp_inet_driver_entry = 
+#ifdef __OSE__
+/* The structure of the signal used for requesting asynchronous 
+ * notification from the stack. Under normal circumstances the network stack 
+ * shouldn't overwrite the value set in the fd field by the sender 
+ * of the request */
+struct OseAsyncSig {
+    struct FmEvent event;
+    int fd;
+};
+
+union SIGNAL {
+    SIGSELECT signo;
+    struct OseAsyncSig async;
+};
+
+static ErlDrvSSizeT tcp_inet_ctl_ose(ErlDrvData e, unsigned int cmd,
+				     char* buf, ErlDrvSizeT len,
+				     char** rbuf, ErlDrvSizeT rsize);
+static void tcp_inet_commandv_ose(ErlDrvData e, ErlIOVec* ev);
+static void tcp_inet_drv_output_ose(ErlDrvData data, ErlDrvEvent event);
+static void tcp_inet_drv_input_ose(ErlDrvData data, ErlDrvEvent event);
+static ErlDrvOseEventId inet_resolve_signal(union SIGNAL *sig);
+
+#ifdef INET_DRV_DEBUG
+
+static char *read_req = "SO_EVENT_READ_REQUEST";
+static char *read_rep = "SO_EVENT_READ_REPLY";
+static char *write_req = "SO_EVENT_WRITE_REQUEST";
+static char *write_rep = "SO_EVENT_WRITE_REPLY";
+static char *eof_req = "SO_EVENT_EOF_REQUEST";
+static char *eof_rep = "SO_EVENT_EOF_REPLY";
+static char *accept_req = "SO_EVENT_ACCEPT_REQUEST";
+static char *accept_rep = "SO_EVENT_ACCEPT_REPLY";
+static char *connect_req = "SO_EVENT_CONNECT_REQUEST";
+static char *connect_rep = "SO_EVENT_CONNECT_REPLY";
+static char *error_req = "SO_EVENT_ERROR_REQUEST";
+static char *error_rep = "SO_EVENT_ERROR_REPLY";
+static char signo_tmp[32];
+
+static char *signo_to_string(SIGSELECT signo) {
+  switch (signo) {
+  case SO_EVENT_READ_REQUEST: { return read_req; }
+  case SO_EVENT_READ_REPLY: { return read_rep; }
+  case SO_EVENT_WRITE_REQUEST: { return write_req; }
+  case SO_EVENT_WRITE_REPLY: { return write_rep; }
+  case SO_EVENT_EOF_REQUEST: { return eof_req; }
+  case SO_EVENT_EOF_REPLY: { return eof_rep; }
+  case SO_EVENT_ACCEPT_REQUEST: { return accept_req; }
+  case SO_EVENT_ACCEPT_REPLY: { return accept_rep; }
+  case SO_EVENT_CONNECT_REQUEST: { return connect_req; }
+  case SO_EVENT_CONNECT_REPLY: { return connect_rep; }
+  case SO_EVENT_ERROR_REQUEST: { return error_req; }
+  case SO_EVENT_ERROR_REPLY: { return error_rep; }
+  }
+
+  snprintf(signo_tmp,32,"0x%x",signo);
+
+  return signo_tmp;
+}
+
+#endif
+
+#endif /* __OSE__ */
+
+
+static struct erl_drv_entry tcp_inet_driver_entry =
 {
     tcp_inet_init,  /* inet_init will add this driver !! */
     tcp_inet_start, 
@@ -1156,6 +1257,9 @@ static struct erl_drv_entry tcp_inet_driver_entry =
 #ifdef __WIN32__
     tcp_inet_event,
     NULL,
+#elif defined(__OSE__)
+    tcp_inet_drv_input_ose, /*ready_input*/
+    tcp_inet_drv_output_ose, /*ready_output*/
 #else
     tcp_inet_drv_input,
     tcp_inet_drv_output,
@@ -1163,9 +1267,17 @@ static struct erl_drv_entry tcp_inet_driver_entry =
     "tcp_inet",
     NULL,
     NULL,
+#ifdef __OSE__
+    tcp_inet_ctl_ose,
+#else
     tcp_inet_ctl,
+#endif
     tcp_inet_timeout,
+#ifdef __OSE__
+    tcp_inet_commandv_ose,
+#else
     tcp_inet_commandv,
+#endif
     NULL,
     tcp_inet_flush,
     NULL,
@@ -1181,6 +1293,7 @@ static struct erl_drv_entry tcp_inet_driver_entry =
 
 
 
+#ifdef HAVE_UDP
 static int        packet_inet_init(void);
 static void       packet_inet_stop(ErlDrvData);
 static void       packet_inet_command(ErlDrvData, char*, ErlDrvSizeT);
@@ -1230,6 +1343,7 @@ static struct erl_drv_entry udp_inet_driver_entry =
     NULL,
     inet_stop_select
 };
+#endif
 
 #ifdef HAVE_SCTP
 static struct erl_drv_entry sctp_inet_driver_entry = 
@@ -1293,6 +1407,7 @@ static int tcp_deliver(tcp_descriptor* desc, int len);
 static int tcp_inet_output(tcp_descriptor* desc, HANDLE event);
 static int tcp_inet_input(tcp_descriptor* desc, HANDLE event);
 
+#ifdef HAVE_UDP
 typedef struct {
     inet_descriptor inet;   /* common data structure (DON'T MOVE) */
     int read_packets;       /* Number of packets to read per invocation */
@@ -1304,10 +1419,19 @@ typedef struct {
 
 static int packet_inet_input(udp_descriptor* udesc, HANDLE event);
 static int packet_inet_output(udp_descriptor* udesc, HANDLE event);
+#endif
 
 /* convert descriptor poiner to inet_descriptor pointer */
 #define INETP(d) (&(d)->inet)
 
+#ifdef __OSE__
+static void inet_driver_select(inet_descriptor* desc,
+			       int flags, int onoff);
+static void tcp_inet_ose_dispatch_signals(tcp_descriptor *desc,
+					  int prev_select_state,
+					  union SIGNAL *sig);
+#endif
+
 static int async_ref = 0;          /* async reference id generator */
 #define NEW_ASYNC_ID() ((async_ref++) & 0xffff)
 
@@ -1324,7 +1448,6 @@ static int async_ref = 0;          /* async reference id generator */
 
 static ErlDrvTermData am_ok;
 static ErlDrvTermData am_tcp;
-static ErlDrvTermData am_udp;
 static ErlDrvTermData am_error;
 static ErlDrvTermData am_einval;
 static ErlDrvTermData am_inet_async;
@@ -1334,10 +1457,13 @@ static ErlDrvTermData am_closed;
 static ErlDrvTermData am_tcp_passive;
 static ErlDrvTermData am_tcp_closed;
 static ErlDrvTermData am_tcp_error;
-static ErlDrvTermData am_udp_passive;
-static ErlDrvTermData am_udp_error;
 static ErlDrvTermData am_empty_out_q;
 static ErlDrvTermData am_ssl_tls;
+#ifdef HAVE_UDP
+static ErlDrvTermData am_udp;
+static ErlDrvTermData am_udp_passive;
+static ErlDrvTermData am_udp_error;
+#endif
 #ifdef HAVE_SCTP
 static ErlDrvTermData am_sctp;
 static ErlDrvTermData am_sctp_passive;
@@ -1545,6 +1671,7 @@ static void *realloc_wrapper(void *current, ErlDrvSizeT size){
 #   define SCTP_ANC_BUFF_SIZE   INET_DEF_BUFFER/2 /* XXX: not very good... */
 #endif
 
+#ifdef HAVE_UDP
 static int load_ip_port(ErlDrvTermData* spec, int i, char* buf)
 {
     spec[i++] = ERL_DRV_INT;
@@ -1579,6 +1706,7 @@ static int load_ip_address(ErlDrvTermData* spec, int i, int family, char* buf)
     }
     return i;
 }
+#endif
 
 
 #ifdef HAVE_SCTP
@@ -1745,10 +1873,12 @@ static void release_buffer(ErlDrvBinary* buf)
     }
 }
 
+#ifdef HAVE_UDP
 static ErlDrvBinary* realloc_buffer(ErlDrvBinary* buf, ErlDrvSizeT newsz)
 {
     return driver_realloc_binary(buf, newsz);
 }
+#endif
 
 /* use a TRICK, access the refc field to see if any one else has
  * a ref to this buffer then call driver_free_binary else 
@@ -3409,6 +3539,7 @@ static int tcp_error_message(tcp_descriptor* desc, int err)
     return erl_drv_output_term(desc->inet.dport, spec, i);
 }
 
+#ifdef HAVE_UDP
 /* 
 ** active mode message:
 **        {udp,  S, IP, Port, [H1,...Hsz | Data]} or
@@ -3499,6 +3630,7 @@ static int packet_binary_message
     ASSERT(i <= PACKET_ERL_DRV_TERM_DATA_LEN);
     return erl_drv_output_term(desc->dport, spec, i);
 }
+#endif
 
 /*
 ** active mode message: send active-to-passive transition message
@@ -3513,6 +3645,9 @@ static int packet_binary_message
 
      DEBUGF(("packet_passive_message(%ld):\r\n", (long)desc->port));
 
+#if !defined(HAVE_UDP) && !defined(HAVE_SCTP)
+     i = LOAD_ATOM(spec, i, am_tcp_passive);
+#else
      if (desc->sprotocol == IPPROTO_TCP)
          i = LOAD_ATOM(spec, i, am_tcp_passive);
      else {
@@ -3522,12 +3657,14 @@ static int packet_binary_message
          i = LOAD_ATOM(spec, i, am_udp_passive);
 #endif
      }
+#endif
      i = LOAD_PORT(spec, i, desc->dport);
      i = LOAD_TUPLE(spec, i, 2);
      ASSERT(i <= 6);
      return erl_drv_output_term(desc->dport, spec, i);
  }
 
+#ifdef HAVE_UDP
 /*
 ** send active message {udp_error|sctp_error, S, Error}
 */
@@ -3554,7 +3691,7 @@ static int packet_error_message(udp_descriptor* udesc, int err)
     ASSERT(i == sizeof(spec)/sizeof(*spec));
     return erl_drv_output_term(desc->dport, spec, i);
 }
-
+#endif
 
 /* 
 ** active=TRUE:
@@ -3619,7 +3756,7 @@ tcp_reply_binary_data(tcp_descriptor* desc, ErlDrvBinary* bin, int offs, int len
     return code;
 }
 
-
+#ifdef HAVE_UDP
 static int
 packet_reply_binary_data(inet_descriptor* desc, unsigned  int hsz,
 			 ErlDrvBinary   * bin,  int offs, int len,
@@ -3642,6 +3779,7 @@ packet_reply_binary_data(inet_descriptor* desc, unsigned  int hsz,
 	return code;
     }
 }
+#endif
 
 /* ----------------------------------------------------------------------------
 
@@ -3817,7 +3955,9 @@ static int inet_init()
 
     INIT_ATOM(ok);
     INIT_ATOM(tcp);
+#ifdef HAVE_UDP
     INIT_ATOM(udp);
+#endif
     INIT_ATOM(error);
     INIT_ATOM(einval);
     INIT_ATOM(inet_async);
@@ -3827,8 +3967,10 @@ static int inet_init()
     INIT_ATOM(tcp_passive);
     INIT_ATOM(tcp_closed);
     INIT_ATOM(tcp_error);
+#ifdef HAVE_UDP
     INIT_ATOM(udp_passive);
     INIT_ATOM(udp_error);
+#endif
     INIT_ATOM(empty_out_q);
     INIT_ATOM(ssl_tls);
 
@@ -3847,7 +3989,10 @@ static int inet_init()
 
     /* add TCP, UDP and SCTP drivers */
     add_driver_entry(&tcp_inet_driver_entry);
+#ifdef HAVE_UDP
     add_driver_entry(&udp_inet_driver_entry);
+#endif
+
 #ifdef HAVE_SCTP
     /* Check the size of SCTP AssocID -- currently both this driver and the
        Erlang part require 32 bit: */
@@ -4176,6 +4321,16 @@ static void desc_close(inet_descriptor* desc)
 	desc->forced_events = 0;
 	desc->send_would_block = 0;
 #endif
+#ifdef __OSE__
+	if (desc->events[0]) {
+	  driver_select(desc->port,desc->events[0],FD_READ|FD_WRITE|ERL_DRV_USE,0);
+	  driver_select(desc->port,desc->events[1],FD_READ|FD_WRITE|ERL_DRV_USE,0);
+	  driver_select(desc->port,desc->events[2],FD_READ|FD_WRITE|ERL_DRV_USE,0);
+	  driver_select(desc->port,desc->events[3],FD_READ|FD_WRITE|ERL_DRV_USE,0);
+	  driver_select(desc->port,desc->events[4],FD_READ|FD_WRITE|ERL_DRV_USE,0);
+	  driver_select(desc->port,desc->events[5],FD_READ|FD_WRITE|ERL_DRV_USE,0);
+	}
+#else
 	/*
 	 * We should close the fd here, but the other driver might still
 	 * be selecting on it.
@@ -4185,6 +4340,7 @@ static void desc_close(inet_descriptor* desc)
 			  ERL_DRV_USE, 0);
 	else
 	  inet_stop_select((ErlDrvEvent)(long)desc->event,NULL);
+#endif
 	desc->event = INVALID_EVENT; /* closed by stop_select callback */
 	desc->s = INVALID_SOCKET;
 	desc->event_mask = 0;
@@ -4226,6 +4382,64 @@ static int erl_inet_close(inet_descriptor* desc)
     return 0;
 }
 
+#ifdef __OSE__
+static void inet_select_init(inet_descriptor* desc)
+{
+    desc->events[0] =
+        erl_drv_ose_event_alloc(SO_EVENT_READ_REPLY,
+                desc->s,
+                inet_resolve_signal,
+                NULL);
+    driver_select(desc->port, desc->events[0],
+            ERL_DRV_READ|ERL_DRV_USE, 1);
+
+    desc->events[1] =
+        erl_drv_ose_event_alloc(SO_EVENT_EOF_REPLY,
+                desc->s,
+                inet_resolve_signal,
+                NULL);
+    driver_select(desc->port, desc->events[1],
+            ERL_DRV_READ|ERL_DRV_USE, 1);
+
+    desc->events[2] =
+        erl_drv_ose_event_alloc(SO_EVENT_ACCEPT_REPLY,
+                desc->s,
+                inet_resolve_signal,
+                NULL);
+    driver_select(desc->port, desc->events[2],
+            ERL_DRV_READ|ERL_DRV_USE, 1);
+
+    /* trigger tcp_inet_input */
+    desc->events[3] =
+        erl_drv_ose_event_alloc(SO_EVENT_WRITE_REPLY,
+                desc->s,
+                inet_resolve_signal,
+                NULL);
+    driver_select(desc->port, desc->events[3],
+            ERL_DRV_WRITE|ERL_DRV_USE, 1);
+
+    desc->events[4] =
+        erl_drv_ose_event_alloc(SO_EVENT_CONNECT_REPLY,
+                desc->s,
+                inet_resolve_signal,
+                NULL);
+    driver_select(desc->port, desc->events[4],
+            ERL_DRV_WRITE|ERL_DRV_USE, 1);
+
+    desc->events[5] =
+        erl_drv_ose_event_alloc(SO_EVENT_ERROR_REPLY,
+                desc->s,
+                inet_resolve_signal,
+                NULL);
+    driver_select(desc->port, desc->events[5],
+            ERL_DRV_WRITE|ERL_DRV_USE, 1);
+
+    /* Issue a select on error event before any other select to be sure we are
+       prepared to receive error notifications from the stack, even in the
+       situations when select isn't issued */
+    sock_select(desc, SOCK_FD_ERROR, 1);
+}
+#endif
 
 static ErlDrvSSizeT inet_ctl_open(inet_descriptor* desc, int domain, int type,
 				  char** rbuf, ErlDrvSizeT rsize)
@@ -4309,6 +4523,10 @@ static ErlDrvSSizeT inet_ctl_open(inet_descriptor* desc, int domain, int type,
 #ifdef __WIN32__
     driver_select(desc->port, desc->event, ERL_DRV_READ, 1);
 #endif
+#ifdef __OSE__
+    inet_select_init(desc);
+#endif
+
     desc->state = INET_STATE_OPEN;
     desc->stype = type;
     desc->sfamily = domain;
@@ -4328,7 +4546,14 @@ static ErlDrvSSizeT inet_ctl_fdopen(inet_descriptor* desc, int domain, int type,
 	return ctl_error(sock_errno(), rbuf, rsize);
     if (name.sa.sa_family != domain)
 	return ctl_error(EINVAL, rbuf, rsize);
+#ifdef __OSE__        
+    /* for fdopen duplicating the sd will allow to uniquely identify
+       the signal from OSE with erlang port */
+    desc->s = sock_dup(s);    
+#else
     desc->s = s;
+#endif
+
     if ((desc->event = sock_create_event(desc)) == INVALID_EVENT)
 	return ctl_error(sock_errno(), rbuf, rsize);
     SET_NONBLOCKING(desc->s);
@@ -4338,8 +4563,15 @@ static ErlDrvSSizeT inet_ctl_fdopen(inet_descriptor* desc, int domain, int type,
     desc->state = INET_STATE_BOUND; /* assume bound */
     if (type == SOCK_STREAM) { /* check if connected */
 	sz = sizeof(name);
-	if (!IS_SOCKET_ERROR(sock_peer(s, (struct sockaddr*) &name, &sz)))
+	if (!IS_SOCKET_ERROR(sock_peer(s, (struct sockaddr*) &name, &sz))) {
 	    desc->state = INET_STATE_CONNECTED;
+#ifdef __OSE__
+            /* since we are dealing with different descriptors (i.e. inet and
+               socket) the select part should be initialized with the right
+               values */
+            inet_select_init(desc);
+#endif
+        }
     }
 
     desc->prebound = 1; /* used to prevent a real close since
@@ -4365,8 +4597,7 @@ struct addr_if {
 
 
 #ifndef SIOCGIFNETMASK
-static struct in_addr net_mask(in)
-struct in_addr in;
+static struct in_addr net_mask(struct in_addr in)
 {
     register u_long i = sock_ntohl(in.s_addr);
 
@@ -5929,6 +6160,7 @@ static int inet_set_opts(inet_descriptor* desc, char* ptr, int len)
 	    }
 	    continue;
 
+#ifdef HAVE_UDP
 	case INET_LOPT_UDP_READ_PACKETS:
 	    if (desc->stype == SOCK_DGRAM) {
 		udp_descriptor* udesc = (udp_descriptor*) desc;
@@ -5936,6 +6168,7 @@ static int inet_set_opts(inet_descriptor* desc, char* ptr, int len)
 		udesc->read_packets = ival;
 	    }
 	    continue;
+#endif
 
 #ifdef HAVE_SETNS
 	case INET_LOPT_NETNS:
@@ -6902,6 +7135,7 @@ static ErlDrvSSizeT inet_fill_opts(inet_descriptor* desc,
 	    }
 	    continue;
 
+#ifdef HAVE_UDP
 	case INET_LOPT_UDP_READ_PACKETS:
 	    if (desc->stype == SOCK_DGRAM) {
 		*ptr++ = opt;
@@ -6911,6 +7145,7 @@ static ErlDrvSSizeT inet_fill_opts(inet_descriptor* desc,
 		TRUNCATE_TO(0,ptr);
 	    }
 	    continue;
+#endif
 
 #ifdef HAVE_SETNS
 	case INET_LOPT_NETNS:
@@ -8041,6 +8276,15 @@ static ErlDrvData inet_start(ErlDrvPort port, int size, int protocol)
 #ifdef HAVE_SETNS
     desc->netns = NULL;
 #endif
+#ifdef __OSE__
+    desc->select_state = 0;
+    desc->events[0] = NULL;
+    desc->events[1] = NULL;
+    desc->events[2] = NULL;
+    desc->events[3] = NULL;
+    desc->events[4] = NULL;
+    desc->events[5] = NULL;
+#endif
 
     return (ErlDrvData)desc;
 }
@@ -8761,6 +9005,11 @@ static tcp_descriptor* tcp_inet_copy(tcp_descriptor* desc,SOCKET s,
 
     copy_desc->inet.port = port;
     copy_desc->inet.dport = driver_mk_port(port);
+
+#ifdef __OSE__
+    inet_select_init(&copy_desc->inet);
+#endif
+
     *err = 0;
     return copy_desc;
 }
@@ -8822,8 +9071,22 @@ static void tcp_inet_stop(ErlDrvData e)
     inet_stop(INETP(desc));
 }
 
+#ifdef __OSE__
+
+static ErlDrvSSizeT tcp_inet_ctl_ose(ErlDrvData e, unsigned int cmd,
+				     char* buf, ErlDrvSizeT len,
+				     char** rbuf, ErlDrvSizeT rsize) {
 
-    
+  tcp_descriptor* desc = (tcp_descriptor*)e;
+  int prev_select_state = INETP(desc)->select_state;
+
+  ErlDrvSSizeT res = tcp_inet_ctl(e,cmd,buf,len,rbuf,rsize);
+
+  tcp_inet_ose_dispatch_signals((tcp_descriptor*)e,prev_select_state,NULL);
+
+  return res;
+}
+#endif
 
 /* TCP requests from Erlang */
 static ErlDrvSSizeT tcp_inet_ctl(ErlDrvData e, unsigned int cmd,
@@ -9039,7 +9302,7 @@ static ErlDrvSSizeT tcp_inet_ctl(ErlDrvData e, unsigned int cmd,
 		ErlDrvTermData caller = driver_caller(desc->inet.port);
 		tcp_descriptor* accept_desc;
 		int err;
-		
+
 		if ((accept_desc = tcp_inet_copy(desc,s,caller,&err)) == NULL) {
 		    sock_close(s);
 		    return ctl_error(err, rbuf, rsize);
@@ -9073,7 +9336,8 @@ static ErlDrvSSizeT tcp_inet_ctl(ErlDrvData e, unsigned int cmd,
 	char tbuf[2];
 	int n;
 
-	DEBUGF(("tcp_inet_ctl(%ld): RECV\r\n", (long)desc->inet.port)); 
+	DEBUGF(("tcp_inet_ctl(%ld): RECV (s=%d)\r\n",
+		(long)desc->inet.port, desc->inet.s)); 
 	/* INPUT: Timeout(4),  Length(4) */
 	if (!IS_CONNECTED(INETP(desc))) {
 	    if (desc->tcp_add_flags & TCP_ADDF_DELAYED_CLOSE_RECV) {
@@ -9245,6 +9509,16 @@ static void tcp_inet_command(ErlDrvData e, char *buf, ErlDrvSizeT len)
     DEBUGF(("tcp_inet_command(%ld) }\r\n", (long)desc->inet.port)); 
 }
 
+#ifdef __OSE__
+
+static void tcp_inet_commandv_ose(ErlDrvData e, ErlIOVec* ev) {
+  int prev_select_state = INETP((tcp_descriptor*)e)->select_state;
+  tcp_inet_commandv(e, ev);
+  tcp_inet_ose_dispatch_signals((tcp_descriptor*)e,prev_select_state,NULL);
+}
+
+#endif
+
 
 static void tcp_inet_commandv(ErlDrvData e, ErlIOVec* ev)
 {
@@ -9308,6 +9582,22 @@ static void inet_stop_select(ErlDrvEvent event, void* _)
 {
 #ifdef __WIN32__
     WSACloseEvent((HANDLE)event);
+#elif defined(__OSE__)
+    ErlDrvOseEventId id;
+    union SIGNAL *sig;
+    erl_drv_ose_event_fetch(event, NULL, &id,NULL);
+    DEBUGF(("inet_stop_select(?#?) {s=%d\n",id));
+    sock_close((int)id);
+    /* On socket close all the signals waiting to be processed as part of the
+       select should be deallocated */
+    while((sig = erl_drv_ose_get_signal(event))) {
+      DEBUGF(("inet_stop_select(?#?): Freeing signal %s\n",
+	      signo_to_string(sig->signo)));
+      free_buf(&sig);
+    }
+    erl_drv_ose_event_free(event);
+    DEBUGF(("inet_stop_select(?#?) }\n"));
+      
 #else
     sock_close((SOCKET)(long)event);
 #endif
@@ -9427,12 +9717,13 @@ static int tcp_remain(tcp_descriptor* desc, int* len)
     int n = desc->i_ptr - ptr;  /* number of bytes read */
     int tlen;
 
-    DEBUGF(("tcp_remain(%ld): s=%d, n=%d, nfill=%d nsz=%d\r\n", 
-	    (long)desc->inet.port, desc->inet.s, n, nfill, nsz));
+    DEBUGF(("tcp_remain(%ld): s=%d, n=%d, nfill=%d nsz=%d, tlen %d\r\n",
+	    (long)desc->inet.port, desc->inet.s, n, nfill, nsz, tlen));
 
     tlen = packet_get_length(desc->inet.htype, ptr, n, 
                              desc->inet.psize, desc->i_bufsz,
                              &desc->http_state);
+
     if (tlen > 0) {
         if (tlen <= n) { /* got a packet */
             *len = tlen;
@@ -9840,7 +10131,146 @@ static void tcp_inet_event(ErlDrvData e, ErlDrvEvent event)
     return;
 }
 
-#endif /* WIN32 */
+#elif defined(__OSE__) /* !__WIN32__ */
+/* The specific resolve signal function. It will return the socket descriptor
+   for which the select was issued */
+static ErlDrvOseEventId inet_resolve_signal(union SIGNAL *sig) {
+  DEBUGF(("%s(?#?): s=%d got signal %s, status = %d, extra = %d, sender = 0x%x\n",
+	  __FUNCTION__,sig->async.fd,signo_to_string(sig->signo),
+	  sig->async.event.status,
+	  sig->async.event.extra,sender(&sig)));
+  if (sig->signo == SO_EVENT_READ_REPLY ||
+      sig->signo == SO_EVENT_ACCEPT_REPLY ||
+      sig->signo == SO_EVENT_EOF_REPLY ||
+      sig->signo == SO_EVENT_WRITE_REPLY ||
+      sig->signo == SO_EVENT_ERROR_REPLY ||
+      sig->signo == SO_EVENT_CONNECT_REPLY ) {
+    return sig->async.fd;
+  }
+
+  return -1;
+}
+
+static void inet_driver_select(inet_descriptor* desc,
+			       int flags, int onoff) {
+    ASSERT(!desc->is_ignored);
+
+    if(onoff) {
+      desc->select_state |= flags;
+    } else {
+      desc->select_state &= ~flags;
+    }
+}
+
+static ssize_t writev_fallback(int fd, const struct iovec *iov, int iovcnt, int max_sz)
+{
+    size_t data_len = 0;
+    size_t sent = 0;
+    ssize_t n;
+    int i;
+
+    for(i = 0; i < iovcnt; i++)
+    {
+        data_len = iov[i].iov_len;
+tryagain:        
+        n = sock_send(fd, iov[i].iov_base, data_len, 0);
+        if (IS_SOCKET_ERROR(n)) {
+            /* If buffer length is greater than the amount stack is able to
+             * send out then try to send at least max_sz (this comes with
+             * SO_EVENT_WRITE_REPLY signal*/
+            if ((errno == EMSGSIZE) && (max_sz > 0) && (data_len > max_sz)) {
+                data_len = max_sz;
+                goto tryagain;
+            }
+            break;
+        }
+        sent += n;
+    }
+    return sent;
+}
+
+#define OSE_EVENT_REQ(TCP_DESC,EVENT) do {				\
+    union SIGNAL *sig = alloc(sizeof(struct OseAsyncSig), EVENT);	\
+    sig->async.fd = INETP(TCP_DESC)->s;					\
+    ose_request_event(INETP(TCP_DESC)->s, &sig, 1);			\
+    DEBUGF(("%s(%ld): s=%d sent %s\r\n",__FUNCTION__,			\
+      INETP(TCP_DESC)->port,INETP(TCP_DESC)->s,signo_to_string(EVENT))); \
+  } while(0)
+
+static void tcp_inet_ose_dispatch_signals(tcp_descriptor *desc,
+					  int prev_select_state,
+					  union SIGNAL *sig) {
+  if (sig) {
+    DEBUGF(("tcp_inet_ose_dispatch_signals(%ld) {s=%d resend\r\n",
+	    (long)INETP(desc)->port,INETP(desc)->s));
+    /* We are reacting to a signal, which means that if
+       the select_state for that signal is still activated
+       we should send a new signal */
+    switch (sig->signo) {
+    case SO_EVENT_READ_REPLY: {
+      if (INETP(desc)->select_state & FD_READ)
+	OSE_EVENT_REQ(desc,SO_EVENT_READ_REQUEST);
+      break;
+    }
+    case SO_EVENT_WRITE_REPLY: {
+      if (INETP(desc)->select_state & FD_WRITE)
+	OSE_EVENT_REQ(desc,SO_EVENT_WRITE_REQUEST);
+      break;
+    }
+    case SO_EVENT_CONNECT_REPLY: {
+      if (INETP(desc)->select_state & FD_CONNECT)
+	OSE_EVENT_REQ(desc,SO_EVENT_CONNECT_REQUEST);
+      break;
+    }
+    case SO_EVENT_ACCEPT_REPLY: {
+      if (INETP(desc)->select_state & FD_ACCEPT)
+	OSE_EVENT_REQ(desc,SO_EVENT_ACCEPT_REQUEST);
+      break;
+    }
+    case SO_EVENT_ERROR_REPLY: {
+      if (INETP(desc)->select_state & SOCK_FD_ERROR)
+	OSE_EVENT_REQ(desc,SO_EVENT_ERROR_REQUEST);
+      break;
+    }
+
+    }
+    DEBUGF(("tcp_inet_ose_dispatch_signals(%ld) }\r\n",
+	    (long)INETP(desc)->port));
+  }
+
+  if (INETP(desc)->select_state != prev_select_state) {
+    /* If the select state has changed we have to issue signals for
+       the state parts that have changed. */
+    int xor_select_state = INETP(desc)->select_state ^ prev_select_state;
+    DEBUGF(("tcp_inet_ose_dispatch_signals(%ld) {s=%d select change\r\n",
+	    (long)INETP(desc)->port,INETP(desc)->s));
+    if ((xor_select_state & FD_READ) &&
+	(INETP(desc)->select_state & FD_READ)) {
+      OSE_EVENT_REQ(desc,SO_EVENT_READ_REQUEST);
+    }
+    if ((xor_select_state & FD_WRITE) &&
+	(INETP(desc)->select_state & FD_WRITE)) {
+      OSE_EVENT_REQ(desc,SO_EVENT_WRITE_REQUEST);
+    }
+    if ((xor_select_state & FD_CONNECT) &&
+	(INETP(desc)->select_state & FD_CONNECT)) {
+      OSE_EVENT_REQ(desc,SO_EVENT_CONNECT_REQUEST);
+    }
+    if ((xor_select_state & FD_ACCEPT) &&
+	(INETP(desc)->select_state & FD_ACCEPT)) {
+      OSE_EVENT_REQ(desc,SO_EVENT_ACCEPT_REQUEST);
+    }
+    if ((xor_select_state & SOCK_FD_ERROR) &&
+	(INETP(desc)->select_state & SOCK_FD_ERROR)) {
+      OSE_EVENT_REQ(desc,SO_EVENT_ERROR_REQUEST);
+    }
+
+    DEBUGF(("tcp_inet_ose_dispatch_signals(%ld) }\r\n",
+	    (long)INETP(desc)->port));
+  }
+}
+
+#endif /* __OSE__ */
 
 
 /* socket has input:
@@ -9861,7 +10291,7 @@ static int tcp_inet_input(tcp_descriptor* desc, HANDLE event)
 	unsigned int len;
 	inet_address remote;
 	inet_async_op *this_op = desc->inet.opt;
-	
+
 	len = sizeof(desc->inet.remote);
 	s = sock_accept(desc->inet.s, (struct sockaddr*) &remote, &len);
 	if (s == INVALID_SOCKET && sock_errno() == ERRNO_BLOCK) {
@@ -9930,7 +10360,6 @@ static int tcp_inet_input(tcp_descriptor* desc, HANDLE event)
 	while (desc->inet.state == INET_STATE_MULTI_ACCEPTING) {
 	    len = sizeof(desc->inet.remote);
 	    s = sock_accept(desc->inet.s, (struct sockaddr*) &remote, &len);
-	    
 	    if (s == INVALID_SOCKET && sock_errno() == ERRNO_BLOCK) {
 		/* Just try again, no real error, keep the last return code */
 		goto done;
@@ -10256,6 +10685,49 @@ static int tcp_send(tcp_descriptor* desc, char* ptr, ErlDrvSizeT len)
     return 0;
 }
 
+#ifdef __OSE__
+
+static void tcp_inet_drv_output_ose(ErlDrvData data, ErlDrvEvent event)
+{
+  union SIGNAL *event_sig = erl_drv_ose_get_signal(event);
+
+  while (event_sig) {
+      int prev_select_state = INETP((tcp_descriptor*)data)->select_state;
+      int res = tcp_inet_output((tcp_descriptor*)data, (HANDLE)event_sig);
+      if (res != -1) {
+	tcp_inet_ose_dispatch_signals((tcp_descriptor*)data,
+				      prev_select_state,event_sig);
+	free_buf(&event_sig);
+	event_sig = erl_drv_ose_get_signal(event);
+      } else {
+	/* NOTE: here the event object could have been deallocated!!!!
+	   inet_stop_select is called when doing driver_select(ERL_DRV_USE,0)
+	 */
+	free_buf(&event_sig);
+	return;
+      }
+  }
+}
+
+static void tcp_inet_drv_input_ose(ErlDrvData data, ErlDrvEvent event)
+{
+  union SIGNAL *event_sig = erl_drv_ose_get_signal(event);
+
+  while (event_sig) {
+    int prev_select_state = INETP((tcp_descriptor*)data)->select_state;
+    int res = tcp_inet_input((tcp_descriptor*)data, (HANDLE)event);
+    if (res != -1) {
+      tcp_inet_ose_dispatch_signals((tcp_descriptor*)data, prev_select_state,
+				    event_sig);
+      free_buf(&event_sig);
+      event_sig = erl_drv_ose_get_signal(event);
+    } else {
+      free_buf(&event_sig);
+      return;
+    }
+  }
+}
+#else
 static void tcp_inet_drv_output(ErlDrvData data, ErlDrvEvent event)
 {
     (void)tcp_inet_output((tcp_descriptor*)data, (HANDLE)event);
@@ -10265,6 +10737,7 @@ static void tcp_inet_drv_input(ErlDrvData data, ErlDrvEvent event)
 {
     (void)tcp_inet_input((tcp_descriptor*)data, (HANDLE)event);
 }
+#endif
 
 /* socket ready for ouput:
 ** 1. INET_STATE_CONNECTING => non block connect ?
@@ -10330,6 +10803,13 @@ static int tcp_inet_output(tcp_descriptor* desc, HANDLE event)
 	    ssize_t n;
 	    SysIOVec* iov;
 
+#ifdef __OSE__
+            /* For large size buffers case the amount of data that the stack is
+               able to send out (received in the .extra field) should be passed
+               down to writev_fallback */
+            n = event ? ((union SIGNAL*)event)->async.event.extra : 0;
+#endif
+
 	    if ((iov = driver_peekq(ix, &vsize)) == NULL) {
 		sock_select(INETP(desc), FD_WRITE, 0);
 		send_empty_out_q_msgs(INETP(desc));
@@ -10341,8 +10821,8 @@ static int tcp_inet_output(tcp_descriptor* desc, HANDLE event)
 	    if (IS_SOCKET_ERROR(sock_sendv(desc->inet.s, iov, vsize, &n, 0))) {
 	    write_error:
 		if ((sock_errno() != ERRNO_BLOCK) && (sock_errno() != EINTR)) {
-		    DEBUGF(("tcp_inet_output(%ld): sock_sendv(%d) errno = %d\r\n",
-			    (long)desc->inet.port, vsize, sock_errno()));
+		    DEBUGF(("tcp_inet_output(%ld): sock_sendv(%d) errno = %d (errno %d)\r\n",
+			    (long)desc->inet.port, vsize, sock_errno(), errno));
 		    ret =  tcp_send_error(desc, sock_errno());
 		    goto done;
 		}
@@ -10355,6 +10835,12 @@ static int tcp_inet_output(tcp_descriptor* desc, HANDLE event)
 				    sizes > (max 32 bit signed int) */
 	      size_t howmuch = 0x7FFFFFFF; /* max signed 32 bit */
 	      int x;
+#ifdef __OSE__
+              /* For EWOULDBLOCK sock_sendv returns 0 so we have to be sure it
+                 wasn't the case */
+              if(sock_errno() == ERRNO_BLOCK) 
+                    goto done;
+#endif
 	      for(x = 0; x < vsize && iov[x].iov_len == 0; ++x)
 		;
 	      if (x < vsize) {
@@ -10499,6 +10985,7 @@ static udp_descriptor* sctp_inet_copy(udp_descriptor* desc, SOCKET s, int* err)
 
 
 
+#ifdef HAVE_UDP
 static int packet_inet_init()
 {
     return 0;
@@ -10529,6 +11016,7 @@ static ErlDrvData udp_inet_start(ErlDrvPort port, char *args)
     set_default_msgq_limits(port);
     return data;
 }
+#endif
 
 #ifdef HAVE_SCTP
 static ErlDrvData sctp_inet_start(ErlDrvPort port, char *args)
@@ -10539,6 +11027,7 @@ static ErlDrvData sctp_inet_start(ErlDrvPort port, char *args)
 }
 #endif
 
+#ifdef HAVE_UDP
 static void packet_inet_stop(ErlDrvData e)
 {
     /* There should *never* be any "empty out q" subscribers on
@@ -11049,7 +11538,7 @@ static void packet_inet_command(ErlDrvData e, char* buf, ErlDrvSizeT len)
     else
 	inet_reply_ok(desc);
 }
-
+#endif
 
 #ifdef __WIN32__
 static void packet_inet_event(ErlDrvData e, ErlDrvEvent event)
@@ -11071,6 +11560,7 @@ static void packet_inet_event(ErlDrvData e, ErlDrvEvent event)
 
 #endif
 
+#ifdef HAVE_UDP
 static void packet_inet_drv_input(ErlDrvData e, ErlDrvEvent event)
 {
     (void)  packet_inet_input((udp_descriptor*)e, (HANDLE)event);
@@ -11327,6 +11817,7 @@ static int packet_inet_output(udp_descriptor* udesc, HANDLE event)
     DEBUGF(("packet_inet_output(%ld) }\r\n", (long)desc->port));
     return ret;
 }
+#endif
 
 /*---------------------------------------------------------------------------*/
 
diff --git a/erts/emulator/sys/ose/default.lmconf b/erts/emulator/sys/ose/beam.lmconf
index a66b0ece56..4ad46b01d9 100644
--- a/erts/emulator/sys/ose/default.lmconf
+++ b/erts/emulator/sys/ose/beam.lmconf
@@ -4,12 +4,13 @@ OSE_LM_POOL_SIZE=0x200000
 OSE_LM_MAIN_NAME=main
 OSE_LM_MAIN_STACK_SIZE=0xF000
 OSE_LM_MAIN_PRIORITY=20
+## Has to be of a type that allows MAM
 OSE_LM_PROGRAM_TYPE=APP_RAM
 OSE_LM_DATA_INIT=YES
 OSE_LM_BSS_INIT=YES
 OSE_LM_EXEC_MODEL=SHARED
 HEAP_MAX_SIZE=1000000000
-HEAP_SMALL_BUF_INIT_SIZE=64000000
+HEAP_SMALL_BUF_INIT_SIZE=20971520
 HEAP_LARGE_BUF_THRESHOLD=16000000
 HEAP_LOCK_TYPE=2
 
diff --git a/erts/emulator/sys/ose/erl_main.c b/erts/emulator/sys/ose/erl_main.c
index 03119c3fec..23a9bc93a4 100644
--- a/erts/emulator/sys/ose/erl_main.c
+++ b/erts/emulator/sys/ose/erl_main.c
@@ -30,6 +30,8 @@
 int
 main(int argc, char **argv) {
 
+  (void)stdin;(void)stdout;(void)stderr;
+
   /* When starting using pm_create -c ARGV="-- -root ..", argv[0] is the first
      part of ARGV and not the name of the executable. So we shuffle some
      pointers here to make erl_start happy. */
diff --git a/erts/emulator/sys/ose/erl_poll.c b/erts/emulator/sys/ose/erl_poll.c
index ca1ed6e53a..7d2a3d1e0b 100644
--- a/erts/emulator/sys/ose/erl_poll.c
+++ b/erts/emulator/sys/ose/erl_poll.c
@@ -551,7 +551,12 @@ int erts_poll_wait(ErtsPollSet ps,
                 fd.id, fd.signo, current_process());
              erts_send_error_to_logger_nogl(dsbufp);
 	     timeout = 0;
-	     ASSERT(0);
+             /* Under normal circumstances the signal is deallocated by the
+              * driver that issued the select operation. But in this case
+              * there's no driver waiting for such signal so we have to
+              * deallocate it here */
+             if (sig)
+                 free_buf(&sig);
 	  } else {
 	    int i;
 	    struct erts_sys_fd_type *fd = NULL;
@@ -737,6 +742,7 @@ union SIGNAL *erl_drv_ose_get_signal(ErlDrvEvent drv_ev) {
       ev->msgs = msg->next;
       ethr_mutex_unlock(&ev->mtx);
       erts_free(ERTS_ALC_T_FD_SIG_LIST,msg);
+      restore(sig);
       return sig;
     }
 }
diff --git a/erts/emulator/sys/ose/sys.c b/erts/emulator/sys/ose/sys.c
index c892cc69c7..5b950a7dae 100644
--- a/erts/emulator/sys/ose/sys.c
+++ b/erts/emulator/sys/ose/sys.c
@@ -195,7 +195,9 @@ static volatile int children_died;
       write_buff += sizeof(struct aiocb *);                             \
       memcpy(write_buff,BUFF,SIZE+1);                                   \
       SET_AIO(*write_req,FD,SIZE,write_buff);                           \
-      aio_write(write_req);                                             \
+      if (aio_write(write_req))						\
+	ramlog_printf("%s:%d: write failed with %d\n",			\
+		      __FILE__,__LINE__,errno);				\
    }                                                                    \
 } while(0)
 
@@ -210,13 +212,13 @@ static volatile int children_died;
    driver_free(buffer_ptr);                                             \
 } while(0)
 
-/* When we have several schedulers, we need to make sure
- * that scheduler issuing aio_dispatch() is the owner on the signal */
 #define DISPATCH_AIO(sig) do {                                          \
-   restore(sig);                                                        \
-   aio_dispatch(sig);                                                   \
+   if (aio_dispatch(sig))						\
+     ramlog_printf("%s:%d: dispatch failed with %d\n",			\
+		   __FILE__,__LINE__,errno);				\
    } while(0)
 
+#define AIO_PIPE_SIZE 1024
 
 /* debug print macros */
 #define DEBUG_RES 0
@@ -371,6 +373,63 @@ thr_create_prepare_child(void *vtcdp)
 
 #endif /* #ifdef USE_THREADS */
 
+/* The two functions below are stolen from win_con.c
+   They have to use malloc/free/realloc directly becasue
+   we want to do able to do erts_printf very early on.
+ */
+#define VPRINTF_BUF_INC_SIZE 128
+static erts_dsprintf_buf_t *
+grow_vprintf_buf(erts_dsprintf_buf_t *dsbufp, size_t need)
+{
+    char *buf;
+    size_t size;
+
+    ASSERT(dsbufp);
+
+    if (!dsbufp->str) {
+	size = (((need + VPRINTF_BUF_INC_SIZE - 1)
+		 / VPRINTF_BUF_INC_SIZE)
+		* VPRINTF_BUF_INC_SIZE);
+	buf = (char *) malloc(size * sizeof(char));
+    }
+    else {
+	size_t free_size = dsbufp->size - dsbufp->str_len;
+
+	if (need <= free_size)
+	    return dsbufp;
+
+	size = need - free_size + VPRINTF_BUF_INC_SIZE;
+	size = (((size + VPRINTF_BUF_INC_SIZE - 1)
+		 / VPRINTF_BUF_INC_SIZE)
+		* VPRINTF_BUF_INC_SIZE);
+	size += dsbufp->size;
+        buf = (char *) realloc((void *) dsbufp->str,
+			       size * sizeof(char));
+    }
+    if (!buf)
+	return NULL;
+    if (buf != dsbufp->str)
+	dsbufp->str = buf;
+    dsbufp->size = size;
+    return dsbufp;
+}
+
+static int erts_sys_ramlog_printf(char *format, va_list arg_list)
+{
+    int res,i;
+    erts_dsprintf_buf_t dsbuf = ERTS_DSPRINTF_BUF_INITER(grow_vprintf_buf);
+    res = erts_vdsprintf(&dsbuf, format, arg_list);
+    if (res >= 0) {
+      for (i = 0; i < dsbuf.str_len; i+= 50)
+	/* We print 50 characters at a time because otherwise
+	   the ramlog looks broken */
+        ramlog_printf("%.*s",dsbuf.str_len-50 < 0?dsbuf.str_len:50,dsbuf.str+i);
+    }
+    if (dsbuf.str)
+      free((void *) dsbuf.str);
+    return res;
+}
+
 void
 erts_sys_pre_init(void)
 {
@@ -409,6 +468,9 @@ erts_sys_pre_init(void)
     children_died = 0;
 #endif
 #endif /* USE_THREADS */
+
+    erts_printf_stdout_func = erts_sys_ramlog_printf;
+
     erts_smp_atomic_init_nob(&sys_misc_mem_sz, 0);
 }
 
@@ -650,7 +712,7 @@ static void stop_select(ErlDrvEvent, void*);
 static PROCESS
 get_signal_proxy_pid(void) {
    union SIGNAL *sig;
-   SIGSELECT any_sig[] = {0};
+   SIGSELECT any_sig[] = {1,ERTS_SIGNAL_OSE_DRV_ATTACH};
 
    if (!sig_proxy_pid) {
       sig = alloc(sizeof(union SIGNAL), ERTS_SIGNAL_OSE_DRV_ATTACH);
@@ -685,7 +747,7 @@ resolve_signal(union SIGNAL* sig) {
 struct erl_drv_entry spawn_driver_entry = {
     spawn_init,
     spawn_start,
-    erl_stop,
+    NULL, /* erl_stop, */
     output,
     ready_input,
     ready_output,
@@ -784,7 +846,11 @@ set_driver_data(ErlDrvPort port_num,
 
     /* READ */
     if (read_write & DO_READ) {
-       efs_examine_fd(ifd, FLIB_FD_HANDLE, &driver_data[ifd].handle, 0);
+       EfsStatus res = efs_examine_fd(ifd, FLIB_FD_HANDLE,
+				      &driver_data[ifd].handle, 0);
+       if (res != EFS_SUCCESS)
+	 ramlog_printf("%s:%d: efs_examine_fd(%d) failed with %d\n",
+		       __FILE__,__LINE__,ifd,errno);
        driver_data[ifd].ifd = ifd;
        driver_data[ifd].packet_bytes = packet_bytes;
        driver_data[ifd].port_num = port_num;
@@ -792,10 +858,9 @@ set_driver_data(ErlDrvPort port_num,
 
        /* async read struct */
        memset(&driver_data[ifd].aiocb, 0, sizeof(struct aiocb));
-       driver_data[ifd].aiocb.aio_buf = driver_alloc(255);
+       driver_data[ifd].aiocb.aio_buf = driver_alloc(AIO_PIPE_SIZE);
        driver_data[ifd].aiocb.aio_fildes = ifd;
-       driver_data[ifd].aiocb.aio_nbytes = 255;
-
+       driver_data[ifd].aiocb.aio_nbytes = (packet_bytes?packet_bytes:AIO_PIPE_SIZE);
        driver_data[ifd].alive = 1;
        driver_data[ifd].status = 0;
        driver_data[ifd].input_event =
@@ -826,7 +891,9 @@ set_driver_data(ErlDrvPort port_num,
        (void) driver_select(port_num, driver_data[ifd].input_event,
 			     (ERL_DRV_READ | ERL_DRV_USE), 1);
 
-       aio_read(&driver_data[ifd].aiocb);
+       if (aio_read(&driver_data[ifd].aiocb))
+	 ramlog_printf("%s:%d: aio_read(%d) failed with %d\n",
+		       __FILE__,__LINE__,ifd,errno);
     }
     else { /* WRITE ONLY */
        efs_examine_fd(ofd, FLIB_FD_HANDLE, &driver_data[ofd].handle, 0);
@@ -926,7 +993,7 @@ spawn_start(ErlDrvPort port_num, char* name, SysDriverOpts* opts)
 {
     int ifd[2];
     int ofd[2];
-    static uint32_t ticker = 0;
+    static uint32_t ticker = 1;
     PmStatus pm_status;
     OSDOMAIN domain = PM_NEW_DOMAIN;
     PROCESS progpid, mainbid, mainpid;
@@ -938,39 +1005,53 @@ spawn_start(ErlDrvPort port_num, char* name, SysDriverOpts* opts)
     int handle_size;
     char *ptr;
 
-    /* handle arguments */
-    ptr = strchr(name, ' ');
-    if (ptr != NULL) {
-       *ptr ='\0';
-       ptr++;
-       args = ptr;
+   
+    args = driver_alloc(strlen(name)+1);
+    strcpy(args, name);
+    /* We need to handle name in three parts 
+     * - install handle (must be unique)
+     * - install binary (needed for ose_pm_install_load_module())
+     * - full path (as argument to the spawned applications env.var
+     */
+
+    /* full path including arguments */
+    args = driver_alloc(strlen(name)+1);
+    strcpy(args, name);
+
+    /* handle path */
+    tmp_handle = strrchr(name, '/');
+    if (tmp_handle == NULL) {
+       tmp_handle = name;
     }
     else {
-       args = NULL;
+       tmp_handle++;
     }
 
-    /* create an install handle */
-    ptr = strrchr(name, '/');
+    /* handle args */
+    ptr = strchr(tmp_handle, ' ');
     if (ptr != NULL) {
-       ptr++;
-       tmp_handle = ptr;
+       *ptr = '\0';
+       handle_size = ptr - tmp_handle;
     }
     else {
-       tmp_handle = name;
+       handle_size = strlen(name)+1;
     }
-    handle_size = strlen(tmp_handle)+1;
-    handle_size += (ticker<10)?3:((ticker<100)?4:5);
 
+    /* make room for ticker */
+    handle_size += (ticker<10)?3:((ticker<100)?4:5);
     handle = driver_alloc(handle_size);
-    snprintf(handle, handle_size, "%s_%d", tmp_handle, ticker);
-
+    
     do {
-       snprintf(handle, handle_size, "%s_%d", tmp_handle, ticker++);
+       snprintf(handle, handle_size, "%s_%d", tmp_handle, ticker);
        pm_status = ose_pm_install_load_module(0, "ELF", name, handle,
                                               0, 0, NULL);
-
+       ticker++;
     } while (pm_status == PM_EINSTALL_HANDLE_ALREADY_INSTALLED);
-    DEBUG_CHECK_RES(pm_status, PM_SUCCESS);
+
+    if (pm_status != PM_SUCCESS) {
+       errno = ENOSYS; /* FIXME add comment */
+       return ERL_DRV_ERROR_ERRNO; 
+    }
 
     /* Create Program */
     pm_status = ose_pm_create_program(&domain, handle, 0, 0,
@@ -1143,17 +1224,13 @@ static void erl_stop(ErlDrvData drv_data)
       if (data->ifd != data->ofd) { /* read and write */
          nbio_stop_fd(data->port_num, data->input_event);
          nbio_stop_fd(data->port_num, data->output_event);
-         driver_select(data->port_num, data->input_event, ERL_DRV_USE, 0);
-         driver_select(data->port_num, data->output_event, ERL_DRV_USE, 0);
       }
       else { /* write only */
          nbio_stop_fd(data->port_num, data->output_event);
-         driver_select(data->port_num, data->output_event, ERL_DRV_USE, 0);
       }
    }
    else { /* read only */
       nbio_stop_fd(data->port_num, data->input_event);
-      driver_select(data->port_num, data->input_event, ERL_DRV_USE, 0);
    }
    close(data->ifd);
    close(data->ofd);
@@ -1177,18 +1254,31 @@ static void output(ErlDrvData drv_data, char* buf, ErlDrvSizeT len)
     lbp = lb + (4-(data->packet_bytes));
 
     if ((sz = driver_sizeq(data->port_num)) > 0) {
-	driver_enq(data->port_num, lbp, data->packet_bytes);
-	driver_enq(data->port_num, buf, len);
-	if (sz + len + data->packet_bytes >= (1 << 13))
+       if (data->packet_bytes != 0) {
+          driver_enq(data->port_num, lbp, data->packet_bytes);
+       }
+       driver_enq(data->port_num, buf, len);
+
+       if (sz + len + data->packet_bytes >= (1 << 13))
 	    set_busy_port(data->port_num, 1);
     }
     else {
-       driver_enq(data->port_num, buf, len);  /* n is the skip value */
-
+       char *pbbuf;
+       if (data->packet_bytes != 0) {
+          pbbuf = malloc(len + data->packet_bytes);
+          int i;
+          for (i = 0; i < data->packet_bytes; i++) {
+             *pbbuf++ = *lbp++;
+          }
+          strncpy(pbbuf, buf, len);
+          pbbuf -= data->packet_bytes;
+       }
        driver_select(data->port_num, data->output_event,
 		      ERL_DRV_WRITE|ERL_DRV_USE, 1);
-
-       WRITE_AIO(data->ofd, len, buf);
+       WRITE_AIO(data->ofd, 
+             (data->packet_bytes ? len+data->packet_bytes : len), 
+             (data->packet_bytes ? pbbuf : buf));
+       if (data->packet_bytes != 0) free(pbbuf);
     }
     return; /* 0; */
 }
@@ -1204,12 +1294,12 @@ static int port_inp_failure(ErlDrvPort port_num, ErlDrvEvent ready_fd, int res)
     ASSERT(res <= 0);
 
     erl_drv_ose_event_fetch(ready_fd,&sig_no, NULL, (void **)&fd);
-
     /* As we need to handle two signals, we do this in two steps */
     if (driver_data[*fd].alive) {
        report_exit_status(driver_data[*fd].report_exit, 0); /* status? */
     }
     else {
+       driver_select(port_num,ready_fd,DO_READ|DO_WRITE,0);
        clear_fd_data(*fd);
        driver_report_exit(driver_data[*fd].port_num, driver_data[*fd].status);
        /* As we do not really know if the spawn has crashed or exited nicely
@@ -1248,6 +1338,10 @@ static void ready_input(ErlDrvData drv_data, ErlDrvEvent ready_fd)
        }
        else {
           res = sig->fm_read_reply.actual;
+          if (res == 0) {
+             port_inp_failure(data->port_num, ready_fd, res);
+             break;
+          }
 
           if (data->packet_bytes == 0) {
              if (res < 0) {
@@ -1258,6 +1352,7 @@ static void ready_input(ErlDrvData drv_data, ErlDrvEvent ready_fd)
              else if (res == 0) {
                 /* read of 0 bytes, eof, otherside of pipe is assumed dead */
                 port_inp_failure(data->port_num, ready_fd, res);
+                break;
              }
              else {
                 buf = driver_alloc(res);
@@ -1267,100 +1362,91 @@ static void ready_input(ErlDrvData drv_data, ErlDrvEvent ready_fd)
                 driver_output(data->port_num, (char*) buf, res);
                 driver_free(buf);
              }
+                /* clear the previous read */
+                memset(data->aiocb.aio_buf, 0, res);
+
+                /* issue a new read */
+                DISPATCH_AIO(sig);
+                aio_read(&data->aiocb);
           }
-          /* We try to read the remainder */
-          else if (fd_data[data->ifd].remain > 0) {
-             if (res < 0) {
-                if ((errno != EINTR) && (errno != ERRNO_BLOCK)) {
-                   port_inp_failure(data->port_num, ready_fd, res);
+          else if (data->packet_bytes && fd_data[data->ifd].remain > 0) {
+             /* we've read a partial package, or a header */
+
+             if (res == fd_data[data->ifd].remain) { /* we are done! */
+                char *buf = data->aiocb.aio_buf;
+                int i;
+
+                /* do we have anything buffered? */
+                if (fd_data[data->ifd].buf != NULL) {
+                   memcpy(fd_data[data->ifd].buf + fd_data[data->ifd].sz,
+                          buf, res);
+                   buf = fd_data[data->ifd].buf;
                 }
-             }
-             else if (res == 0) {
-                port_inp_failure(data->port_num, ready_fd, res);
-             }
-             else if (res == fd_data[data->ifd].remain) { /* we're done  */
-                driver_output(data->port_num,
-                              fd_data[data->ifd].buf,
-                              fd_data[data->ifd].sz);
+
+                fd_data[data->ifd].sz += res;
+                driver_output(data->port_num, buf, (fd_data[data->ifd].sz>0?fd_data[data->ifd].sz:res));
                 clear_fd_data(data->ifd);
-             }
-             else { /*  if (res < fd_data[fd].remain) */
-                fd_data[data->ifd].cpos += res;
-                fd_data[data->ifd].remain -= res;
-             }
-          }
-          else if (fd_data[data->ifd].remain == 0) { /* clean fd */
-             if (res < 0) {
-                if ((errno != EINTR) && (errno != ERRNO_BLOCK)) {
-                   port_inp_failure(data->port_num, ready_fd, res);
+
+                /* clear the previous read */
+                memset(data->aiocb.aio_buf, 0, res);
+             
+                /* issue a new read */
+                DISPATCH_AIO(sig);
+                data->aiocb.aio_nbytes = data->packet_bytes;
+
+                if (data->aiocb.aio_buf == NULL) {
+                   port_inp_failure(data->port_num, ready_fd, -1);
                 }
+                aio_read(&data->aiocb);
              }
-             else if (res == 0) {	/* eof */
-                port_inp_failure(data->port_num, ready_fd, res);
-             }
-             else if (res < data->packet_bytes - fd_data[data->ifd].psz) {
-                memcpy(fd_data[data->ifd].pbuf+fd_data[data->ifd].psz,
-                      (void *)data->aiocb.aio_buf, res);
-                fd_data[data->ifd].psz += res;
-             }
-             else  { /* if (res >= packet_bytes) */
-                unsigned char* cpos = (unsigned char*)data->aiocb.aio_buf;
-                int bytes_left = res;
-
-                while (1) {
-                   int psz = fd_data[data->ifd].psz;
-                   char* pbp = fd_data[data->ifd].pbuf + psz;
-
-                   while (bytes_left && (psz < data->packet_bytes)) {
-                      *pbp++ = *cpos++;
-                      bytes_left--;
-                      psz++;
-                   }
-
-                   if (psz < data->packet_bytes) {
-                      fd_data[data->ifd].psz = psz;
-                      break;
-                   }
-                   fd_data[data->ifd].psz = 0;
-
-                   switch (data->packet_bytes) {
-                      case 1: h = get_int8(fd_data[data->ifd].pbuf);  break;
-                      case 2: h = get_int16(fd_data[data->ifd].pbuf); break;
-                      case 4: h = get_int32(fd_data[data->ifd].pbuf); break;
-                      default: ASSERT(0); return; /* -1; */
-                   }
-
-                   if (h <= (bytes_left)) {
-                      driver_output(data->port_num, (char*) cpos, h);
-                      cpos += h;
-                      bytes_left -= h;
-                      continue;
-                   }
-                   else {		/* The last message we got was split */
-                      char *buf = erts_alloc_fnf(ERTS_ALC_T_FD_ENTRY_BUF, h);
-                      if (!buf) {
-                         errno = ENOMEM;
-                         port_inp_failure(data->port_num, ready_fd, -1);
-                      }
-                      else {
-                         erts_smp_atomic_add_nob(&sys_misc_mem_sz, h);
-                         sys_memcpy(buf, cpos, bytes_left);
-                         fd_data[data->ifd].buf = buf;
-                         fd_data[data->ifd].sz = h;
-                         fd_data[data->ifd].remain = h - bytes_left;
-                         fd_data[data->ifd].cpos = buf + bytes_left;
-                      }
-                      break;
-                   }
+             else if(res < fd_data[data->ifd].remain) { /* received part of a package */
+                if (fd_data[data->ifd].sz == 0) {
+
+                   fd_data[data->ifd].sz += res;
+                   memcpy(fd_data[data->ifd].buf, data->aiocb.aio_buf, res);
+                   fd_data[data->ifd].remain -= res;
+                }
+                else {
+                   memcpy(fd_data[data->ifd].buf + fd_data[data->ifd].sz,
+                          data->aiocb.aio_buf, res);
+                   fd_data[data->ifd].sz += res;
+                   fd_data[data->ifd].remain -= res;
+                }
+                /* clear the previous read */
+                memset(data->aiocb.aio_buf, 0, res);
+
+                /* issue a new read */
+                DISPATCH_AIO(sig);
+                data->aiocb.aio_nbytes = fd_data[data->ifd].remain;
+
+                if (data->aiocb.aio_buf == NULL) {
+                    port_inp_failure(data->port_num, ready_fd, -1);
                 }
+                aio_read(&data->aiocb);
              }
           }
+          else if (data->packet_bytes && fd_data[data->ifd].remain == 0) { /* we've recieved a header */
+
+             /* analyze the header FIXME  */
+             switch (data->packet_bytes) {
+                case 1: h = get_int8(data->aiocb.aio_buf);  break;
+                case 2: h = get_int16(data->aiocb.aio_buf); break;
+                case 4: h = get_int32(data->aiocb.aio_buf); break;
+             }
 
-          /* reset the read buffer and init next asynch read */
-          DISPATCH_AIO(sig);
-          memset((void *)data->aiocb.aio_buf, 0, 255);
+             fd_data[data->ifd].buf = erts_alloc_fnf(ERTS_ALC_T_FD_ENTRY_BUF, h + data->packet_bytes);
+             fd_data[data->ifd].remain = ((h + data->packet_bytes) - res);
 
-          if (res > 0) {
+             /* clear the previous read */
+             memset(data->aiocb.aio_buf, 0, data->packet_bytes);
+
+             /* issue a new read */
+             DISPATCH_AIO(sig);
+             data->aiocb.aio_nbytes = h;
+
+             if (data->aiocb.aio_buf == NULL) {
+                port_inp_failure(data->port_num, ready_fd, -1);
+             }
              aio_read(&data->aiocb);
           }
        }
@@ -1400,11 +1486,16 @@ static void ready_output(ErlDrvData drv_data, ErlDrvEvent ready_fd)
              DISPATCH_AIO(sig);
              FREE_AIO(sig->fm_write_reply.buffer);
              res = driver_deq(data->port_num, iov[0].iov_len);
-             if (res > 0) {
+             if (res > 0) { 
                 iov = driver_peekq(data->port_num, &vlen);
                 WRITE_AIO(data->ofd, iov[0].iov_len, iov[0].iov_base);
              }
          }
+         else if (vlen == 0) {
+            DISPATCH_AIO(sig);
+            FREE_AIO(sig->fm_write_reply.buffer);
+         }
+
       }
       sig = erl_drv_ose_get_signal(ready_fd);
    }
@@ -1650,10 +1741,10 @@ erl_assert_error(const char* expr, const char* func,
 {
     fflush(stdout);
     fprintf(stderr, "%s:%d:%s() Assertion failed: %s\n",
-	    file, func, line, expr);
+	    file, line, func, expr);
     fflush(stderr);
     ramlog_printf("%s:%d:%s() Assertion failed: %s\n",
-		  file, func, line, expr);
+		  file, line, func, expr);
 
     abort();
 }
diff --git a/erts/epmd/src/Makefile.in b/erts/epmd/src/Makefile.in
index 2ea8630491..8dc8dae5f6 100644
--- a/erts/epmd/src/Makefile.in
+++ b/erts/epmd/src/Makefile.in
@@ -148,7 +148,7 @@ endif
 
 ifeq ($(findstring ose,$(TARGET)),ose)
 $(BINDIR)/$(EPMD): $(EPMD_OBJS) $(ERTS_LIB) $(OSE_LM_OBJS)
-	$(call build-ose-load-module, $@, $(EPMD_OBJS) $(OSE_LM_OBJS), $(LIBS), $(LMCONF))
+	$(call build-ose-load-module, $@, $(EPMD_OBJS) $(OSE_LM_OBJS), $(LIBS), $(EPMD_LMCONF))
 else
 $(BINDIR)/$(EPMD): $(EPMD_OBJS) $(ERTS_LIB)
 	$(ld_verbose)$(PURIFY) $(LD) $(LDFLAGS) -o $@ $(EPMD_OBJS) $(LIBS)
diff --git a/erts/etc/common/Makefile.in b/erts/etc/common/Makefile.in
index cfd36af962..0cf965f915 100644
--- a/erts/etc/common/Makefile.in
+++ b/erts/etc/common/Makefile.in
@@ -509,7 +509,7 @@ $(OBJDIR)/crt0_lm.o: $(CRT0_LM)
 OSE_LM_OBJS += $(OBJDIR)/ose_confd.o $(OBJDIR)/crt0_lm.o
 
 $(BINDIR)/run_erl_lm: $(OBJDIR)/run_erl_main.o $(OBJDIR)/safe_string.o $(OBJDIR)/run_erl.o $(OBJDIR)/run_erl_common.o $(OBJDIR)/to_erl_common.o $(OSE_LM_OBJS)
-	$(call build-ose-load-module, $@, $^, $(LIBS), $(LMCONF))
+	$(call build-ose-load-module, $@, $^, $(LIBS), $(RUN_ERL_LMCONF))
 
 
 $(OBJDIR)/run_erl_main.o: $(OSEETC)/run_erl_main.c $(OSEETC)/run_erl.h ../common/to_erl_common.h $(RC_GENERATED)
diff --git a/erts/etc/common/to_erl_common.c b/erts/etc/common/to_erl_common.c
index a49be44b6c..ab706fffe0 100644
--- a/erts/etc/common/to_erl_common.c
+++ b/erts/etc/common/to_erl_common.c
@@ -126,7 +126,8 @@ static int version_handshake(char* buf, int len, int wfd);
 #define READ_AIO(REQ,FD,SIZE,BUFF)					\
   SET_AIO(REQ,FD,SIZE,BUFF);						\
   if (aio_read(&(REQ)) != 0)						\
-    fprintf(stderr,"aio_read of child_read_req(%d) failed\n",FD)
+    fprintf(stderr,"aio_read of child_read_req(%d) failed"		\
+	    "with error %d\n",FD,errno)
 
 union SIGNAL {
   SIGSELECT signo;
diff --git a/erts/etc/ose/etc.lmconf b/erts/etc/ose/etc.lmconf
new file mode 100644
index 0000000000..b402b325b1
--- /dev/null
+++ b/erts/etc/ose/etc.lmconf
@@ -0,0 +1,20 @@
+OSE_LM_STACK_SIZES=256,512,1024,2048,4096,8192,16384,65536
+OSE_LM_SIGNAL_SIZES=31,63,127,255,1023,4095,16383,65535
+OSE_LM_POOL_SIZE=0x200000
+OSE_LM_MAIN_NAME=main
+OSE_LM_MAIN_STACK_SIZE=0xF000
+OSE_LM_MAIN_PRIORITY=20
+## Has to be of a type that allows MAM
+OSE_LM_PROGRAM_TYPE=APP_RAM
+OSE_LM_DATA_INIT=YES
+OSE_LM_BSS_INIT=YES
+OSE_LM_EXEC_MODEL=SHARED
+HEAP_MAX_SIZE=1000000000
+HEAP_SMALL_BUF_INIT_SIZE=64000000
+HEAP_LARGE_BUF_THRESHOLD=16000000
+HEAP_LOCK_TYPE=2
+
+# Setting the environment variable EFS_RESOLVE_TMO on the block to 0.
+# This will eliminiate delays when trying to open files on not mounted
+# volumes.
+EFS_RESOLVE_TMO=0
diff --git a/erts/etc/ose/run_erl_main.c b/erts/etc/ose/run_erl_main.c
index d396ebe93b..2d92924ff2 100644
--- a/erts/etc/ose/run_erl_main.c
+++ b/erts/etc/ose/run_erl_main.c
@@ -45,6 +45,8 @@ int main(int argc, char **argv)
   char run_erl_usage[320],
     to_erl_usage[120];
 
+  (void)stdin;(void)stdout;(void)stderr;
+
   sprintf(run_erl_usage,RUN_ERL_USAGE,"run_erl [-daemon] [-block blockname]");
   sprintf(to_erl_usage,TO_ERL_USAGE,"pipename");
 
diff --git a/erts/include/internal/ethr_mutex.h b/erts/include/internal/ethr_mutex.h
index ee861065c5..6c931e0cd4 100644
--- a/erts/include/internal/ethr_mutex.h
+++ b/erts/include/internal/ethr_mutex.h
@@ -354,7 +354,7 @@ void ethr_rwmutex_rwunlock(ethr_rwmutex *);
 
 #ifdef ETHR_MTX_HARD_DEBUG
 #define ETHR_MTX_HARD_ASSERT(A) \
-  ((void) ((A) ? 1 : ethr_assert_failed(__FILE__, __LINE__, #A)))
+  ((void) ((A) ? 1 : ethr_assert_failed(__FILE__, __LINE__, __func__,#A)))
 #else
 #define ETHR_MTX_HARD_ASSERT(A) ((void) 1)
 #endif
diff --git a/erts/include/internal/ethread.h b/erts/include/internal/ethread.h
index 64f1fae6d8..54acd1295a 100644
--- a/erts/include/internal/ethread.h
+++ b/erts/include/internal/ethread.h
@@ -396,6 +396,18 @@ extern ethr_runtime_t ethr_runtime__;
 
 #include "ethr_atomics.h" /* The atomics API */
 
+#if defined (ETHR_OSE_THREADS)
+static ETHR_INLINE void
+ose_yield(void)
+{
+    if (get_ptype(current_process()) == OS_PRI_PROC) {
+        set_pri(get_pri(current_process()));
+    } else {
+        delay(1);
+    }
+}
+#endif
+
 #if defined(__GNUC__) && !defined(ETHR_OSE_THREADS)
 #  ifndef ETHR_SPIN_BODY
 #    if defined(__i386__) || defined(__x86_64__)
@@ -414,9 +426,9 @@ extern ethr_runtime_t ethr_runtime__;
 #  endif
 #elif defined(ETHR_OSE_THREADS)
 #  ifndef ETHR_SPIN_BODY
-#    define ETHR_SPIN_BODY set_pri(get_pri(current_process()))
+#    define ETHR_SPIN_BODY ose_yield()
 #  else
-#    error "OSE should use set_pri(get_pri(current_process()))"
+#    error "OSE should use ose_yield()"
 #  endif
 #endif
 
@@ -449,7 +461,7 @@ extern ethr_runtime_t ethr_runtime__;
 #      define ETHR_YIELD() (pthread_yield(), 0)
 #    endif
 #  elif defined(ETHR_OSE_THREADS)
-#    define ETHR_YIELD() (set_pri(get_pri(current_process())), 0)
+#    define ETHR_YIELD() (ose_yield(), 0)
 #  else
 #    define ETHR_YIELD() (ethr_compiler_barrier(), 0)
 #  endif