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px4-firmware/misc/pascal/insn32/regm/regm_tree.c

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/**********************************************************************
* regm_tree.c
* Tree managmenet
*
* Copyright (C) 2008-2009 Gregory Nutt. All rights reserved.
* Author: Gregory Nutt <gnutt@nuttx.org>
*
* 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 <stdint.h>
#include <stdio.h>
#include <stdlib.h>
#include <string.h>
#include "keywords.h"
#include "pdefs.h" /* Types needed for unused protos in pinsn.h */
#include "podefs.h" /* Types needed for unused protos in pinsh.h */
#include "pedefs.h"
#include "pofflib.h"
#include "paslib.h"
#include "pinsn.h" /* Folr insn_GetOpCode */
#include "perr.h"
#include "pinsn32.h"
#include "regm.h"
#include "regm_tree.h"
/**********************************************************************
* Definitions
**********************************************************************/
#define INITIAL_PCODE_ALLOC 250
#define PCODE_RELLALLOC 100
/**********************************************************************
* Private Types
**********************************************************************/
/**********************************************************************
* Private Function Prototypes
**********************************************************************/
/**********************************************************************
* Global Variables
**********************************************************************/
/**********************************************************************
* Private Variables
**********************************************************************/
static struct procdata_s *g_pProgramHead = NULL;
/**********************************************************************
* Private Functions
**********************************************************************/
/***********************************************************************/
static inline void regm_DumpIndent(uint32_t dwIndent)
{
while (dwIndent--) putchar(' ');
}
/***********************************************************************/
void regm_DumpNode(struct procdata_s *pNode, unsigned long dwIndent)
{
if (pNode)
{
if (pNode->section[0].dwOffset != pNode->section[1].dwOffset)
{
regm_DumpIndent(dwIndent);
printf("%08lx:%08lx\n",
pNode->section[0].dwOffset,
pNode->section[0].dwOffset + pNode->section[0].dwSize - 1);
}
regm_DumpIndent(dwIndent);
printf("%08lx:%08lx\n",
pNode->section[1].dwOffset,
pNode->section[1].dwOffset + pNode->section[1].dwSize - 1);
regm_DumpNode(pNode->child, dwIndent + 3);
regm_DumpNode(pNode->peer, dwIndent);
}
}
/***********************************************************************/
/**********************************************************************
* Global Functions
**********************************************************************/
/***********************************************************************/
void regm_InitTree(void)
{
g_pProgramHead = NULL;
}
/***********************************************************************/
struct procdata_s *regm_CreateProgSection(void)
{
struct procdata_s *pNode;
pNode = (struct procdata_s *)malloc(sizeof(struct procdata_s));
if (!pNode)
{
fatal(eNOMEMORY);
}
memset(pNode, 0, sizeof(struct procdata_s));
return pNode;
}
/***********************************************************************/
void regm_SetProgRoot(struct procdata_s *pNode)
{
g_pProgramHead = pNode;
pNode->child = NULL;
pNode->peer = NULL;
}
/***********************************************************************/
void regm_AddProgChild(struct procdata_s *pParent, struct procdata_s *pNode)
{
struct procdata_s *pPrev = pParent;
/* Go to the end of the list */
while (pPrev->child != NULL) pPrev = pPrev->child;
/* Deposit the new node at the end of the list */
pPrev->child = pNode;
pNode->child = NULL;
pNode->peer = NULL;
}
/***********************************************************************/
void regm_AddProgPeer(struct procdata_s *pPeer, struct procdata_s *pNode)
{
struct procdata_s *pPrev = pPeer;
/* Go to the end of the list */
while (pPrev->peer != NULL) pPrev = pPrev->peer;
/* Deposit the new node at the end of the list */
pPrev->peer = pNode;
pNode->child = NULL;
pNode->peer = NULL;
}
/***********************************************************************/
struct procdata_s *regm_GetRootNode(void)
{
return g_pProgramHead;
}
/***********************************************************************/
int regm_ForEachPeer(struct procdata_s *pPeer,
int (*pfPeerFunc)(struct procdata_s*, void*),
void *arg)
{
struct procdata_s *pCurr = pPeer;
struct procdata_s *pNext;
int retval;
while (pCurr->peer)
{
pNext = pCurr->peer;
retval = pfPeerFunc(pCurr, arg);
if (retval)
{
return retval;
}
pCurr = pNext;
}
return 0;
}
/***********************************************************************/
int regm_ForEachChild(struct procdata_s *pParent,
int (*pfChildFunc)(struct procdata_s*, void*),
void *arg)
{
struct procdata_s *pCurr = pParent;
struct procdata_s *pNext;
int retval;
while (pCurr->child)
{
pNext = pCurr->child;
retval = pfChildFunc(pCurr, arg);
if (retval)
{
return retval;
}
pCurr = pNext;
}
return 0;
}
/***********************************************************************/
uint32_t regm_ReadNodePCodes(struct procdata_s *pNode, poffHandle_t hPoff,
uint32_t dwStartOffset, uint32_t dwEndOffset,
uint8_t cTerminalOpcode)
{
uint32_t dwOffset = dwStartOffset;
long nAlloc = INITIAL_PCODE_ALLOC;
long nPCodes;
uint8_t bTerminatorFound;
dbg("Reading Node: %08lx %08lx %02x\n",
dwStartOffset, dwEndOffset, cTerminalOpcode);
/* Allocate an inital buffer to hold the instructions */
pNode->pPCode = (OPTYPE*)
malloc(INITIAL_PCODE_ALLOC*sizeof(struct procinsn_s*));
if (!pNode->pPCode)
{
fatal(eNOMEMORY);
}
/* Seek to the beginning of the data */
regm_ProgSeek(hPoff, dwStartOffset);
/* Read all of the instructions in the main program section */
nPCodes = 0;
bTerminatorFound = 0;
do
{
/* Make sure that there is space for another pcode */
if (nPCodes > nAlloc)
{
/* If not, then reallocate the array */
nAlloc += PCODE_RELLALLOC;
pNode->pPCode = (OPTYPE*)
realloc(pNode->pPCode, nAlloc*sizeof(OPTYPE));
}
/* Ready the pcode ito the array */
dwOffset += insn_GetOpCode(hPoff, &pNode->pPCode[nPCodes]);
/* Check for a terminating pcode */
if ((GETOP(&pNode->pPCode[nPCodes]) == cTerminalOpcode) ||
(GETOP(&pNode->pPCode[nPCodes]) == oEND))
{
bTerminatorFound++;
}
/* Increment the count of pcodes read */
nPCodes++;
}
while (!bTerminatorFound && (dwOffset < dwEndOffset));
dbg(" %08lx %08lx %02x\n",
dwStartOffset, dwOffset, GETOP(&pNode->pPCode[nPCodes-1]));
/* Save the number of pcodes that we found */
pNode->nPCodes = nPCodes;
/* Check for the correct terminator */
if (GETOP(&pNode->pPCode[nPCodes-1]) != cTerminalOpcode)
{
fatal(ePOFFCONFUSION);
}
/* Return any unused space in the allocation */
pNode->pPCode = (OPTYPE*)
realloc(pNode->pPCode, nPCodes*sizeof(OPTYPE));
/* Return the actual end offset */
return dwOffset;
}
/***********************************************************************/
void regm_DumpTree(void)
{
if (vRegmDebug)
{
regm_DumpNode(g_pProgramHead, 0);
}
}
/***********************************************************************/
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