Bring over from r5900 branch.

[deliverable/binutils-gdb.git] / gdb / ser-ocd.c

diff --git a/gdb/ser-ocd.c b/gdb/ser-ocd.c
index 1b1213ede0f4c17dd99174f021b2146ceeac58c1..08239bba3a4e6f66970c5c9ccd264bc560c427d9 100644 (file)
--- a/gdb/ser-ocd.c
+++ b/gdb/ser-ocd.c
@@ -22,6 +22,10 @@
 #include "defs.h"
 #include "serial.h"
 
+#ifdef _WIN32
+#include <windows.h>
+#endif
+
 static int ser_ocd_open PARAMS ((serial_t scb, const char *name));
 static void ser_ocd_raw PARAMS ((serial_t scb));
 static int ser_ocd_readchar PARAMS ((serial_t scb, int timeout));
@@ -31,11 +35,35 @@ static void ser_ocd_close PARAMS ((serial_t scb));
 static serial_ttystate ser_ocd_get_tty_state PARAMS ((serial_t scb));
 static int ser_ocd_set_tty_state PARAMS ((serial_t scb, serial_ttystate state));
 
+#ifdef _WIN32
+/* On Windows, this function pointer is initialized to a function in
+   the wiggler DLL.  */
+static int (*dll_do_command) PARAMS ((const char *, char *));
+#endif
+
 static int
 ocd_open (scb, name)
      serial_t scb;
      const char *name;
 {
+#ifdef _WIN32
+  /* Find the wiggler DLL which talks to the board.  */
+  if (dll_do_command == NULL)
+    {
+      HINSTANCE handle;
+
+      /* FIXME: Should the user be able to configure this?  */
+      handle = LoadLibrary ("Wigglers.dll");
+      if (handle == NULL)
+       error ("Can't load Wigglers.dll");
+
+      dll_do_command = ((int (*) PARAMS ((const char *, char *)))
+                       GetProcAddress (handle, "do_command"));
+      if (dll_do_command == NULL)
+       error ("Can't find do_command function in Wigglers.dll");
+    }
+#endif
+
   return 0;
 }
 
@@ -53,21 +81,27 @@ ocd_raw (scb)
   /* Always in raw mode */
 }
 
-/* We need a buffer to store responses from the Wigglers.dll */
-char * from_wigglers_buffer;
-char * bptr;                   /* curr spot in buffer */
-
 static void
 ocd_readremote ()
 {
 }
 
+/* We need a buffer to store responses from the Wigglers.dll */
+#define WIGGLER_BUFF_SIZE 512
+unsigned char from_wiggler_buffer[WIGGLER_BUFF_SIZE];
+unsigned char * wiggler_buffer_ptr;    /* curr spot in buffer */
+
 static int
 ocd_readchar (scb, timeout)
      serial_t scb;
      int timeout;
 {
+  /* Catch attempts at reading past the end of the buffer */
+  if (wiggler_buffer_ptr >
+              (from_wiggler_buffer + (sizeof (char *) * WIGGLER_BUFF_SIZE)))
+    error ("ocd_readchar asked to read past the end of the buffer!");
 
+  return (int) *wiggler_buffer_ptr++; /* return curr char and increment ptr */
 }
 
 struct ocd_ttystate {
@@ -130,12 +164,11 @@ ocd_write (scb, str, len)
 {
   char c;
 
-  ocd_readremote();
-
-#ifdef __CYGWIN32__ 
+#ifdef _WIN32 
   /* send packet to Wigglers.dll and store response so we can give it to
        remote-wiggler.c when get_packet is run */
-  do_command (str, from_wigglers_buffer);
+  dll_do_command (str, from_wiggler_buffer);
+  wiggler_buffer_ptr = from_wiggler_buffer;
 #endif
 
   return 0;
@@ -145,7 +178,6 @@ static void
 ocd_close (scb)
      serial_t scb;
 {
-  ocd_close (0);
 }
 
 static struct serial_ops ocd_ops =