Patch from Emmanuel Raguet <raguet@crf.canon.fr> to add remote debug server

and RPC support to RTEMS.  Thanks. :)  Email follows:

    Hello,

    For Xmas, here is the Remote Debugger on RTEMS !

    Here are 2 patches for the Remote Debugger on RTEMS for pc386 from Linux
    host :

     - one for RTEMS it self,
     - one for GDB-4.17.


    1/ RTEMS patch
    --------------

    This patch adds 2 libraries :
     - a simplified SUN RPC library
     - the Remote Debugger library

    The configuration command is the following :
    ../rtems4/configure --target=i386-rtemself --enable-rtemsbsp=pc386
    --enable-rdbg

    The SUN RPC library is built only if networking is set.
    The RDBG library is built if networking and enable-rdbg are set.

    The function used to initialize the debugger is :
            rtems_rdbg_initialize ();

    A special function has been created to force a task to be
    in a "debug" state : enterRdbg().
    The use of this function is not mandatory.



    2/ GDB-4.17 patch
    -----------------

    This patch create a new RTEMS target for GDB-4.17.

    The configuration command is the following :
    ./configure --enable-shared --target=i386RTEMS

    To connect to a target, use :
      target rtems [your_site_address]

    Then, attach the target using : attach 1

    And... Debug ;)

    You can obtain the original GDB-4.17 on
    ftp://ftp.debian.org/debian/dists/stable/main/source/devel/gdb_4.17.orig.tar.gz

    This has been tested from a Debian 2.0.1 linux host.

1 files changed, 53 insertions, 0 deletions

diff --git a/c/src/lib/include/rdbg/i386/rdbg_f.h b/c/src/lib/include/rdbg/i386/rdbg_f.h
new file mode 100644
index 0000000000..3fd087f50a
--- /dev/null
+++ b/c/src/lib/include/rdbg/i386/rdbg_f.h
@@ -0,0 +1,53 @@
+/*
+ **************************************************************************
+ *
+ * Component =   RDBG
+ * Module =   rdbg_f.h
+ *
+ * Synopsis = Machine-dependent header file
+ *
+ **************************************************************************
+ */
+
+#ifndef RDBG_F_H
+#define RDBG_F_H
+
+#include <rtems.h>
+#include <rdbg/remdeb.h>
+
+#define EFLAGS_TF 0x00100
+
+typedef struct Exception_context_struct {
+  struct Exception_context_struct *next;
+  struct Exception_context_struct *previous;
+  Objects_Id id;
+  Objects_Id semaphoreId;
+  CPU_Exception_frame *ctx;
+} Exception_context;
+
+extern int 	PushExceptCtx 		(Objects_Id Id,
+					 Objects_Id semId,
+					 CPU_Exception_frame *ctx);
+extern int	PopExceptCtx  		(Objects_Id Id);
+extern Exception_context *GetExceptCtx  (Objects_Id Id);
+extern int  	Single_Step		(CPU_Exception_frame* ctx);
+extern int 	CheckForSingleStep 	(CPU_Exception_frame* ctx);
+extern void	BreakPointExcHdl   	(CPU_Exception_frame *ctx);
+extern void	CtxToRegs	   	(const CPU_Exception_frame*,xdr_regs*);
+extern void	RegsToCtx	   	(const xdr_regs*,CPU_Exception_frame*);
+
+extern void	enterRdbg		();
+extern void 	get_ctx_thread		(Thread_Control *thread,
+					 CPU_Exception_frame* ctx);
+extern void 	set_ctx_thread		(Thread_Control *thread,
+					 CPU_Exception_frame* ctx);
+
+void copyback_data_cache_and_invalidate_instr_cache();
+
+extern int    	ExitForSingleStep;
+
+
+#endif
+
+
+