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281 lines
8.8 KiB
281 lines
8.8 KiB
/********************************************************************** |
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* regm_pass1.c |
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* Break the pcode data into sections |
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* |
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* Copyright (C) 2008-2009 Gregory Nutt. All rights reserved. |
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* Author: Gregory Nutt <gnutt@nuttx.org> |
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* |
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* Redistribution and use in source and binary forms, with or without |
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* modification, are permitted provided that the following conditions |
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* are met: |
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* |
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* 1. Redistributions of source code must retain the above copyright |
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* notice, this list of conditions and the following disclaimer. |
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* 2. Redistributions in binary form must reproduce the above copyright |
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* notice, this list of conditions and the following disclaimer in |
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* the documentation and/or other materials provided with the |
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* distribution. |
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* 3. Neither the name NuttX nor the names of its contributors may be |
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* used to endorse or promote products derived from this software |
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* without specific prior written permission. |
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* |
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* THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS |
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* "AS IS" AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT |
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* LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS |
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* FOR A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE |
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* COPYRIGHT OWNER OR CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, |
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* INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, |
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* BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS |
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* OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED |
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* AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT |
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* LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN |
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* ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE |
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* POSSIBILITY OF SUCH DAMAGE. |
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* |
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**********************************************************************/ |
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/********************************************************************** |
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* Included Files |
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**********************************************************************/ |
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#include <stdint.h> |
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#include <stdio.h> |
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#include <stdlib.h> |
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#include <unistd.h> |
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#include "keywords.h" |
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#include "podefs.h" |
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#include "pedefs.h" |
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#include "paslib.h" |
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#include "pofflib.h" |
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#include "pinsn.h" |
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#include "pinsn32.h" |
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#include "perr.h" |
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#include "regm.h" |
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#include "regm_tree.h" |
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#include "regm_pass1.h" |
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/********************************************************************** |
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* Private Function Prototypes |
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**********************************************************************/ |
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static void regm_Pass1Child(poffHandle_t hPoff, |
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struct procdata_s *pParent, |
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uint32_t dwStartOffset, |
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uint32_t dwEndOffset); |
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static void regm_Pass1Peer(poffHandle_t hPoff, |
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struct procdata_s *pPeer, |
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uint32_t dwStartOffset, |
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uint32_t dwEndOffset); |
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static struct procdata_s *regm_Pass1Node(poffHandle_t hPoff, |
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uint32_t dwStartOffset, |
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uint32_t pdwEndOffset, |
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uint8_t chTerminator); |
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static uint32_t regm_CheckSection1(poffHandle_t hPoff, uint32_t dwOffset); |
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static void regm_Pass1Family(poffHandle_t hPoff, |
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struct procdata_s *pNode, |
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uint32_t dwEndOffset); |
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/********************************************************************** |
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* Global Variables |
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**********************************************************************/ |
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/********************************************************************** |
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* Private Variables |
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**********************************************************************/ |
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/********************************************************************** |
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* Private Functions |
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**********************************************************************/ |
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/***********************************************************************/ |
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static void regm_Pass1Child(poffHandle_t hPoff, struct procdata_s *pParent, |
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uint32_t dwStartOffset, uint32_t dwEndOffset) |
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{ |
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struct procdata_s *pNode; |
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TRACE(stderr, "[regm_Pass1Child]"); |
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/* Read the proc/func body */ |
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pNode = regm_Pass1Node(hPoff, dwStartOffset, dwEndOffset, oRET); |
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/* Put the func/proc body section into the tree */ |
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regm_AddProgChild(pParent, pNode); |
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/* Handle nested and child proc/func blocks */ |
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regm_Pass1Family(hPoff, pNode, dwEndOffset); |
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} |
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/***********************************************************************/ |
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static void regm_Pass1Peer(poffHandle_t hPoff, struct procdata_s *pPeer, |
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uint32_t dwStartOffset, uint32_t dwEndOffset) |
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{ |
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struct procdata_s *pNode; |
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TRACE(stderr, "[regm_Pass1Peer]"); |
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/* Read the proc/func body */ |
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pNode = regm_Pass1Node(hPoff, dwStartOffset, dwEndOffset, oRET); |
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/* Put the func/proc body section into the tree */ |
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regm_AddProgPeer(pPeer, pNode); |
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/* Handle nested and child proc/func blocks */ |
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regm_Pass1Family(hPoff, pNode, dwEndOffset); |
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} |
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/***********************************************************************/ |
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static struct procdata_s *regm_Pass1Node(poffHandle_t hPoff, |
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uint32_t dwStartOffset, |
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uint32_t pdwEndOffset, |
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uint8_t chTerminator) |
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{ |
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struct procdata_s *pNode; |
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uint32_t dwActualEndOffset; |
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TRACE(stderr, "[regm_Pass1Node]"); |
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/* Create a container for the proc/func body, and read the data */ |
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pNode = regm_CreateProgSection(); |
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/* Check if there is a jump at the beginning of the segment */ |
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pNode->section[0].dwOffset = dwStartOffset; |
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pNode->section[1].dwOffset = regm_CheckSection1(hPoff, dwStartOffset); |
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/* Read all of the p-codes associated with the node */ |
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dwActualEndOffset = regm_ReadNodePCodes(pNode, hPoff, |
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pNode->section[1].dwOffset, |
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pdwEndOffset, chTerminator); |
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/* Now calculate the size of each part of the program section */ |
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pNode->section[1].dwSize = dwActualEndOffset - pNode->section[1].dwOffset; |
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if (pNode->section[0].dwOffset == pNode->section[1].dwOffset) |
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pNode->section[0].dwSize = 0; |
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else |
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pNode->section[0].dwSize = 5; |
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/* Associate debug info with the program section. */ |
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pNode->pFuncInfo = poffFindDebugFuncInfo(pNode->section[0].dwOffset); |
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if (!pNode->pFuncInfo) |
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{ |
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/* This debug information should always be present at this |
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* point. We will need it. |
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*/ |
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fatal(ePOFFCONFUSION); |
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} |
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return pNode; |
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} |
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/***********************************************************************/ |
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static uint32_t regm_CheckSection1 (poffHandle_t hPoff, uint32_t dwOffset) |
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{ |
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OPTYPE op; |
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/* Seek to the beginning of the section. */ |
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regm_ProgSeek(hPoff, dwOffset); |
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/* Read the opcode at that position. */ |
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(void)insn_GetOpCode(hPoff, &op); |
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/* Is it a oJMP instruction? This happens when there are nested |
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* functions. The entry point into the parent function is a jump |
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* around the nested functions. |
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*/ |
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if (GETOP(&op) == oJMP) |
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{ |
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/* Yes, then the block really begins at the target of the jump */ |
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return GETARG(&op); |
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} |
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else |
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{ |
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/* No, then the block really begins right here */ |
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return dwOffset; |
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} |
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} |
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/***********************************************************************/ |
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static void regm_Pass1Family(poffHandle_t hPoff, struct procdata_s *pNode, |
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uint32_t dwEndOffset) |
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{ |
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uint32_t dwSectionEnd; |
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/* Process any nested functions */ |
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if (pNode->section[0].dwOffset != pNode->section[1].dwOffset) |
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{ |
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dwSectionEnd = pNode->section[0].dwOffset + pNode->section[0].dwSize; |
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regm_Pass1Child(hPoff, pNode, dwSectionEnd, pNode->section[1].dwOffset); |
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} |
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/* Process any peer functions */ |
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dwSectionEnd = pNode->section[1].dwOffset + pNode->section[1].dwSize; |
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if (dwSectionEnd < dwEndOffset) |
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{ |
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regm_Pass1Peer(hPoff, pNode, dwSectionEnd, dwEndOffset); |
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} |
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} |
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/********************************************************************** |
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* Global Functions |
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**********************************************************************/ |
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/***********************************************************************/ |
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void regm_Pass1(poffHandle_t hPoff) |
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{ |
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struct procdata_s *pNode; |
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uint32_t dwEntryPoint; |
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TRACE(stderr, "[regm_Pass1]"); |
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/* Get the program entry point from the poff header */ |
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dwEntryPoint = poffGetEntryPoint(hPoff); |
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/* Read the main program body */ |
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pNode = regm_Pass1Node(hPoff, dwEntryPoint, 0xffffffff, oEND); |
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/* Put the main program section into the tree (at the root) */ |
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regm_SetProgRoot(pNode); |
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/* Then process any nested functions */ |
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if (dwEntryPoint != 0) |
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{ |
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regm_Pass1Child(hPoff, pNode, 0, dwEntryPoint); |
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} |
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} |
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/***********************************************************************/ |
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