1 files changed, 147 insertions, 0 deletions
diff --git a/misc/pascal/insn32/libinsn/preloc.c b/misc/pascal/insn32/libinsn/preloc.c
new file mode 100644
index 000000000..6d0b017a4
--- /dev/null
+++ b/misc/pascal/insn32/libinsn/preloc.c
@@ -0,0 +1,147 @@
+/**********************************************************************
+ * preloc.c
+ * Perform P-Code relocations
+ *
+ *   Copyright (C) 2008 Gregory Nutt. All rights reserved.
+ *   Author: Gregory Nutt <spudmonkey@racsa.co.cr>
+ *
+ * Redistribution and use in source and binary forms, with or without
+ * modification, are permitted provided that the following conditions
+ * are met:
+ *
+ * 1. Redistributions of source code must retain the above copyright
+ *    notice, this list of conditions and the following disclaimer.
+ * 2. Redistributions in binary form must reproduce the above copyright
+ *    notice, this list of conditions and the following disclaimer in
+ *    the documentation and/or other materials provided with the
+ *    distribution.
+ * 3. Neither the name NuttX nor the names of its contributors may be
+ *    used to endorse or promote products derived from this software
+ *    without specific prior written permission.
+ *
+ * THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS
+ * "AS IS" AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT
+ * LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS
+ * FOR A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE
+ * COPYRIGHT OWNER OR CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT,
+ * INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING,
+ * BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS
+ * OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED
+ * AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
+ * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN
+ * ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE
+ * POSSIBILITY OF SUCH DAMAGE.
+ *
+ **********************************************************************/
+
+/**********************************************************************
+ * Included Files
+ **********************************************************************/
+
+#include "keywords.h"
+#include "pdefs.h"
+#include "pedefs.h"
+#include "podefs.h"
+#include "pinsn32.h"
+
+#include "pofflib.h"
+#include "perr.h"
+#include "pinsn.h"
+
+/**********************************************************************
+ * Definitions
+ **********************************************************************/
+
+/**********************************************************************
+ * Private Type Definitions
+ **********************************************************************/
+
+/**********************************************************************
+ * Private Function Prototypes
+ **********************************************************************/
+
+/**********************************************************************
+ * Global Variables
+ **********************************************************************/
+
+/**********************************************************************
+ * Private Variables
+ **********************************************************************/
+
+/**********************************************************************
+ * Private Functions
+ **********************************************************************/
+
+int insn_Relocate(OPTYPE *op, uint32 pcOffset, uint32 roOffset)
+{
+  switch (op->op)
+    {
+      /* Catch each instruction that references the read-only data
+       * section.
+       */
+
+    case oLAC:
+      /* Add the offset to the read-only data section */
+
+      op->arg += roOffset;
+      break;
+
+      /* Catch each instruction that references the text section
+       * data via an offset.
+       */
+
+    case oPCAL:  /* Procedure / Function calls */
+    case oJMP:   /* Unconditional jump */
+    case oJEQUZ: /* Jump on unary comparisons with zero */
+    case oJNEQZ:
+    case oJLTZ:
+    case oJGTEZ:
+    case oJGTZ:
+    case oJLTEZ:
+    case oJEQU:  /* Jump on binary comparisons */
+    case oJNEQ:
+    case oJLT:
+    case oJGTE:
+    case oJGT:
+    case oJLTE:
+      /* Add the offset to the text section */
+
+      op->arg += pcOffset;
+      break;
+
+      /* Return an end of file indication if oEND encountered */
+
+    case oEND:
+      return 1;
+
+      /* Otherwise, it is not an interesting opcode */
+    default:
+      break;
+    }
+
+  /* Return 0 on all opcodes other than oEND */
+
+  return 0;
+}
+
+/***********************************************************************/
+
+void insn_FixupProcedureCall(ubyte *progData, uint32 symValue)
+{
+
+  /* Sanity checking */
+
+  if (progData[0] != oPCAL)
+    fatal(ePOFFCONFUSION);
+
+  if (symValue > 0xffff)
+    fatal(eBADSHORTINT);
+
+  /* Perform the relocation */
+
+  progData[2] = symValue >> 8;
+  progData[3] = symValue & 0xff;
+}
+
+
+/***********************************************************************/