1999-11-09 Roland McGrath <roland@baalperazim.frob.com>

	* hurd/report-wait.c (describe_port): Return char * and use __stpcpy
	to return the location of the null byte written into the string.
	(describe_number): Likewise.
	(describe_number): Remove assert, not always used with #.
	If FLAVOR is null, don't use it.
	(describe_number): Take signed argument and print a - if negative.
	(_S_msg_report_wait): Report system call number for system calls that
	aren't mach_msg.  Soup up reporting for mach_msg: If destination port
	matches SS->intr_port, bracket port description with [...] to indicate
	a Hurd interruptible RPC; if destination port is null, examine the
	receive port and report that state; if receive port is also null,
	check for timeout and report its value.
	* sysdeps/mach/hurd/i386/intr-msg.h (MSG_EXAMINE): Return int that is
	zero iff we managed to examine the stack; take new args RCV_NAME,
	SEND_NAME, OPTION, and TIMEOUT to fill in with mach_msg args.

diff --git a/sysdeps/mach/hurd/i386/intr-msg.h b/sysdeps/mach/hurd/i386/intr-msg.h
index a12b2f2..d862d58 100644 (file)
--- a/sysdeps/mach/hurd/i386/intr-msg.h
+++ b/sysdeps/mach/hurd/i386/intr-msg.h
@@ -83,23 +83,35 @@ struct mach_msg_trap_args
   };
 
 
-static inline mach_port_t
-MSG_EXAMINE (struct i386_thread_state *state, int *msgid)
+static inline int
+MSG_EXAMINE (struct i386_thread_state *state, int *msgid,
+            mach_port_t *rcv_name, mach_port_t *send_name,
+            mach_msg_option_t *option, mach_msg_timeout_t *timeout)
 {
   const struct mach_msg_trap_args *args = (const void *) state->uesp;
   mach_msg_header_t *msg;
-  mach_port_t send_port;
 
   if (_hurdsig_catch_memory_fault (args))
-    return MACH_PORT_NULL;
+    return -1;
   msg = args->msg;
+  *option = args->option;
+  *timeout = args->timeout;
+  *rcv_name = args->rcv_name;
   _hurdsig_end_catch_fault ();
 
-  if (_hurdsig_catch_memory_fault (msg))
-    return MACH_PORT_NULL;
-  send_port = msg->msgh_remote_port;
-  *msgid = msg->msgh_id;
-  _hurdsig_end_catch_fault ();
+  if (msg == 0)
+    {
+      *send_name = MACH_PORT_NULL;
+      *msgid = 0;
+    }
+  else
+    {
+      if (_hurdsig_catch_memory_fault (msg))
+       return -1;
+      *send_name = msg->msgh_remote_port;
+      *msgid = msg->msgh_id;
+      _hurdsig_end_catch_fault ();
+    }
 
-  return send_port;
+  return 0;
 }