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Resync new repository with old repo r5166
git-svn-id: http://svn.code.sf.net/p/nuttx/code/trunk@5153 42af7a65-404d-4744-a932-0658087f49c3
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patacongo
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/**********************************************************************
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* pflabel.c
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* Label resolution logic
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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 <string.h>
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#include "keywords.h"
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#include "pdefs.h"
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#include "pedefs.h"
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#include "perr.h"
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#include "poff.h"
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/**********************************************************************
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* Pre-processor Definitions
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**********************************************************************/
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#define INITIAL_DEFINED_ALLOCATION (1024*sizeof(optDefinedLabelRef_t))
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#define DEFINED_INCREMENT (256*sizeof(optDefinedLabelRef_t))
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#define INITIAL_UNDEFINED_ALLOCATION (1024*sizeof(optUndefinedLabelRef_t))
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#define UNDEFINED_INCREMENT (256*sizeof(optUndefinedLabelRef_t))
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/**********************************************************************
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* Private Types
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**********************************************************************/
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struct optDefinedLabelRef_s
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{
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uint32_t label;
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uint32_t pc;
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};
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typedef struct optDefinedLabelRef_s optDefinedLabelRef_t;
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struct optUndefinedLabelRef_s
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{
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uint32_t label;
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uint32_t symIndex;
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};
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typedef struct optUndefinedLabelRef_s optUndefinedLabelRef_t;
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/**********************************************************************
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* Private Data
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**********************************************************************/
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static optDefinedLabelRef_t *definedLabelRefs = NULL;
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static uint32_t definedLabelRefAlloc = 0;
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static uint32_t nDefinedLabelRefs = 0;
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static optUndefinedLabelRef_t *undefinedLabelRefs = NULL;
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static uint32_t undefinedLabelRefAlloc = 0;
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static uint32_t nUndefinedLabelRefs = 0;
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/**********************************************************************
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* Private Function Prototypes
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**********************************************************************/
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/**********************************************************************
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* Private Inline Functions
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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 poffCheckDefinedLabelAlloc(void)
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{
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/* Has the label reference table been allocated */
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if (!definedLabelRefs)
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{
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/* No, allocate it now */
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definedLabelRefs = (optDefinedLabelRef_t*)
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malloc(INITIAL_DEFINED_ALLOCATION);
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if (!definedLabelRefs)
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{
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fatal(eNOMEMORY);
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}
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definedLabelRefAlloc = INITIAL_DEFINED_ALLOCATION;
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}
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}
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/**********************************************************************/
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static void poffCheckDefinedLabelRealloc(void)
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{
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/* Check if there is room for the new data */
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if (((nDefinedLabelRefs + 1)*sizeof(optDefinedLabelRef_t)) >
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definedLabelRefAlloc)
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{
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uint32_t newAlloc = definedLabelRefAlloc + DEFINED_INCREMENT;
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void *tmp;
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/* Reallocate the label reference tabel */
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tmp = realloc(definedLabelRefs, newAlloc);
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if (!tmp)
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{
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fatal(eNOMEMORY);
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}
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/* And set the new size */
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definedLabelRefAlloc = newAlloc;
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definedLabelRefs = (optDefinedLabelRef_t*)tmp;
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}
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}
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/**********************************************************************/
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static void poffCheckUndefinedLabelAlloc(void)
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{
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/* Has the label reference table been allocated */
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if (!undefinedLabelRefs)
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{
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/* No, allocate it now */
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undefinedLabelRefs = (optUndefinedLabelRef_t*)
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malloc(INITIAL_UNDEFINED_ALLOCATION);
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if (!undefinedLabelRefs)
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{
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fatal(eNOMEMORY);
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}
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undefinedLabelRefAlloc = INITIAL_UNDEFINED_ALLOCATION;
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}
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}
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/**********************************************************************/
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static void poffCheckUndefinedLabelRealloc(void)
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{
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/* Check if there is room for the new data */
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if (((nUndefinedLabelRefs + 1)*sizeof(optUndefinedLabelRef_t)) >
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undefinedLabelRefAlloc)
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{
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uint32_t newAlloc = undefinedLabelRefAlloc + UNDEFINED_INCREMENT;
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void *tmp;
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/* Reallocate the label reference tabel */
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tmp = realloc(undefinedLabelRefs, newAlloc);
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if (!tmp)
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{
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fatal(eNOMEMORY);
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}
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/* And set the new size */
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undefinedLabelRefAlloc = newAlloc;
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undefinedLabelRefs = (optUndefinedLabelRef_t*)tmp;
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}
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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 poffAddToDefinedLabelTable(uint32_t label, uint32_t pc)
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{
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/* Make sure we have memory to do this. If not, we will crash */
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poffCheckDefinedLabelAlloc();
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poffCheckDefinedLabelRealloc();
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/* Add the label to the table */
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definedLabelRefs[nDefinedLabelRefs].label = label;
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definedLabelRefs[nDefinedLabelRefs].pc = pc;
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nDefinedLabelRefs++;
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}
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/**********************************************************************/
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void poffAddToUndefinedLabelTable(uint32_t label, uint32_t symIndex)
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{
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/* Make sure we have memory to do this. If not, we will crash */
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poffCheckUndefinedLabelAlloc();
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poffCheckUndefinedLabelRealloc();
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/* Add the label to the table */
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undefinedLabelRefs[nUndefinedLabelRefs].label = label;
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undefinedLabelRefs[nUndefinedLabelRefs].symIndex = symIndex;
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nUndefinedLabelRefs++;
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}
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/**********************************************************************/
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int poffGetSymIndexForUndefinedLabel(uint32_t label)
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{
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int i;
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for (i = 0; i < nUndefinedLabelRefs; i++)
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{
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if (undefinedLabelRefs[i].label == label)
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{
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return undefinedLabelRefs[i].symIndex;
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}
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}
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return -1;
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}
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/**********************************************************************/
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int poffGetPcForDefinedLabel(uint32_t label)
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{
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int i;
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for (i = 0; i < nDefinedLabelRefs; i++)
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{
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if (definedLabelRefs[i].label == label)
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{
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return definedLabelRefs[i].pc;
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}
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}
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return -1;
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}
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/**********************************************************************/
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void poffReleaseLabelReferences(void)
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{
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if (definedLabelRefs)
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{
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free(definedLabelRefs);
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}
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if (undefinedLabelRefs)
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{
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free(undefinedLabelRefs);
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}
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}
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/**********************************************************************/
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