diff options
Diffstat (limited to 'misc/pascal/insn32/regm/regm_pass1.c')
| -rw-r--r-- | misc/pascal/insn32/regm/regm_pass1.c | 279 |
1 files changed, 279 insertions, 0 deletions
diff --git a/misc/pascal/insn32/regm/regm_pass1.c b/misc/pascal/insn32/regm/regm_pass1.c new file mode 100644 index 000000000..0ed1386d3 --- /dev/null +++ b/misc/pascal/insn32/regm/regm_pass1.c @@ -0,0 +1,279 @@ +/**********************************************************************
+ * regm_pass1.c
+ * Break the pcode data into sections
+ *
+ * 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 <stdio.h>
+#include <stdlib.h>
+#include <unistd.h>
+
+#include "keywords.h"
+#include "podefs.h"
+#include "pedefs.h"
+#include "paslib.h"
+#include "pofflib.h"
+#include "pinsn.h"
+#include "pinsn32.h"
+#include "perr.h"
+
+#include "regm.h"
+#include "regm_tree.h"
+#include "regm_pass1.h"
+
+/**********************************************************************
+ * Private Function Prototypes
+ **********************************************************************/
+
+static void regm_Pass1Child(poffHandle_t hPoff,
+ struct procdata_s *pParent,
+ uint32 dwStartOffset,
+ uint32 dwEndOffset);
+static void regm_Pass1Peer(poffHandle_t hPoff,
+ struct procdata_s *pPeer,
+ uint32 dwStartOffset,
+ uint32 dwEndOffset);
+static struct procdata_s *regm_Pass1Node(poffHandle_t hPoff,
+ uint32 dwStartOffset,
+ uint32 pdwEndOffset,
+ ubyte chTerminator);
+static uint32 regm_CheckSection1(poffHandle_t hPoff, uint32 dwOffset);
+static void regm_Pass1Family(poffHandle_t hPoff,
+ struct procdata_s *pNode,
+ uint32 dwEndOffset);
+/**********************************************************************
+ * Global Variables
+ **********************************************************************/
+
+/**********************************************************************
+ * Private Variables
+ **********************************************************************/
+
+/**********************************************************************
+ * Private Functions
+ **********************************************************************/
+
+/***********************************************************************/
+
+static void regm_Pass1Child(poffHandle_t hPoff, struct procdata_s *pParent,
+ uint32 dwStartOffset, uint32 dwEndOffset)
+
+{
+ struct procdata_s *pNode;
+
+ TRACE(stderr, "[regm_Pass1Child]");
+
+ /* Read the proc/func body */
+
+ pNode = regm_Pass1Node(hPoff, dwStartOffset, dwEndOffset, oRET);
+
+ /* Put the func/proc body section into the tree */
+
+ regm_AddProgChild(pParent, pNode);
+
+ /* Handle nested and child proc/func blocks */
+
+ regm_Pass1Family(hPoff, pNode, dwEndOffset);
+}
+
+/***********************************************************************/
+
+static void regm_Pass1Peer(poffHandle_t hPoff, struct procdata_s *pPeer,
+ uint32 dwStartOffset, uint32 dwEndOffset)
+
+{
+ struct procdata_s *pNode;
+
+ TRACE(stderr, "[regm_Pass1Peer]");
+
+ /* Read the proc/func body */
+
+ pNode = regm_Pass1Node(hPoff, dwStartOffset, dwEndOffset, oRET);
+
+ /* Put the func/proc body section into the tree */
+
+ regm_AddProgPeer(pPeer, pNode);
+
+ /* Handle nested and child proc/func blocks */
+
+ regm_Pass1Family(hPoff, pNode, dwEndOffset);
+}
+
+/***********************************************************************/
+
+static struct procdata_s *regm_Pass1Node(poffHandle_t hPoff,
+ uint32 dwStartOffset,
+ uint32 pdwEndOffset,
+ ubyte chTerminator)
+
+{
+ struct procdata_s *pNode;
+ uint32 dwActualEndOffset;
+
+ TRACE(stderr, "[regm_Pass1Node]");
+
+ /* Create a container for the proc/func body, and read the data */
+
+ pNode = regm_CreateProgSection();
+
+ /* Check if there is a jump at the beginning of the segment */
+
+ pNode->section[0].dwOffset = dwStartOffset;
+ pNode->section[1].dwOffset = regm_CheckSection1(hPoff, dwStartOffset);
+
+ /* Read all of the p-codes associated with the node */
+
+ dwActualEndOffset = regm_ReadNodePCodes(pNode, hPoff,
+ pNode->section[1].dwOffset,
+ pdwEndOffset, chTerminator);
+
+ /* Now calculate the size of each part of the program section */
+
+ pNode->section[1].dwSize = dwActualEndOffset - pNode->section[1].dwOffset;
+
+ if (pNode->section[0].dwOffset == pNode->section[1].dwOffset)
+ pNode->section[0].dwSize = 0;
+ else
+ pNode->section[0].dwSize = 5;
+
+ /* Associate debug info with the program section. */
+
+ pNode->pFuncInfo = poffFindDebugFuncInfo(pNode->section[0].dwOffset);
+ if (!pNode->pFuncInfo)
+ {
+ /* This debug information should always be present at this
+ * point. We will need it.
+ */
+
+ fatal(ePOFFCONFUSION);
+ }
+
+ return pNode;
+}
+
+/***********************************************************************/
+
+static uint32 regm_CheckSection1 (poffHandle_t hPoff, uint32 dwOffset)
+{
+ OPTYPE op;
+
+ /* Seek to the beginning of the section. */
+
+ regm_ProgSeek(hPoff, dwOffset);
+
+ /* Read the opcode at that position. */
+
+ (void)insn_GetOpCode(hPoff, &op);
+
+ /* Is it a oJMP instruction? This happens when there are nested
+ * functions. The entry point into the parent function is a jump
+ * around the nested functions.
+ */
+
+ if (GETOP(&op) == oJMP)
+ {
+ /* Yes, then the block really begins at the target of the jump */
+
+ return GETARG(&op);
+ }
+ else
+ {
+ /* No, then the block really begins right here */
+
+ return dwOffset;
+ }
+}
+
+/***********************************************************************/
+
+static void regm_Pass1Family(poffHandle_t hPoff, struct procdata_s *pNode,
+ uint32 dwEndOffset)
+{
+ uint32 dwSectionEnd;
+
+ /* Process any nested functions */
+
+ if (pNode->section[0].dwOffset != pNode->section[1].dwOffset)
+ {
+ dwSectionEnd = pNode->section[0].dwOffset + pNode->section[0].dwSize;
+ regm_Pass1Child(hPoff, pNode, dwSectionEnd, pNode->section[1].dwOffset);
+ }
+
+ /* Process any peer functions */
+
+ dwSectionEnd = pNode->section[1].dwOffset + pNode->section[1].dwSize;
+ if (dwSectionEnd < dwEndOffset)
+ {
+ regm_Pass1Peer(hPoff, pNode, dwSectionEnd, dwEndOffset);
+ }
+}
+
+/**********************************************************************
+ * Global Functions
+ **********************************************************************/
+
+/***********************************************************************/
+
+void regm_Pass1(poffHandle_t hPoff)
+{
+ struct procdata_s *pNode;
+ uint32 dwEntryPoint;
+
+ TRACE(stderr, "[regm_Pass1]");
+
+ /* Get the program entry point from the poff header */
+
+ dwEntryPoint = poffGetEntryPoint(hPoff);
+
+ /* Read the main program body */
+
+ pNode = regm_Pass1Node(hPoff, dwEntryPoint, 0xffffffff, oEND);
+
+ /* Put the main program section into the tree (at the root) */
+
+ regm_SetProgRoot(pNode);
+
+ /* Then process any nested functions */
+
+ if (dwEntryPoint != 0)
+ {
+ regm_Pass1Child(hPoff, pNode, 0, dwEntryPoint);
+ }
+}
+
+/***********************************************************************/
+
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