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361 lines
11 KiB
361 lines
11 KiB
/********************************************************************** |
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* pfread.c |
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* POFF library global variables |
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* |
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* Copyright (C) 2008-2009 Gregory Nutt. All rights reserved. |
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* Author: Gregory Nutt <spudmonkey@racsa.co.cr> |
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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 <sys/types.h> |
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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 <unistd.h> |
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#include <errno.h> |
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#include "keywords.h" /* Standard types */ |
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#include "pedefs.h" /* Pascal error definitions */ |
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#include "perr.h" /* error() */ |
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#include "pofflib.h" /* POFF library interface */ |
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#include "pfprivate.h" /* POFF private definitions */ |
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/********************************************************************** |
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* Pre-processor Definitions |
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**********************************************************************/ |
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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 Function Prototypes |
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***********************************************************************/ |
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static uint16_t poffReadFileHeader(poffHandle_t handle, FILE *poffFile); |
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static uint16_t poffReadSectionHeaders(poffHandle_t handle, FILE *poffFile); |
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static uint16_t poffReadSectionData(poffSectionHeader_t *shdr, |
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uint8_t **sdata, FILE *poffFile); |
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static uint16_t poffReadAllSectionData(poffHandle_t handle, FILE *poffFile); |
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/*********************************************************************** |
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* Private Functions |
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***********************************************************************/ |
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/***********************************************************************/ |
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/* Read and verify the POFF file header */ |
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static uint16_t poffReadFileHeader(poffHandle_t handle, FILE *poffFile) |
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{ |
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poffInfo_t *poffInfo = (poffInfo_t*)handle; |
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size_t entriesRead; |
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/* Seek to the beginning of the file */ |
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if (fseek(poffFile, 0, SEEK_SET) != 0) |
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{ |
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return ePOFFREADERROR; |
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} |
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/* Read the POFF file header */ |
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entriesRead = fread(&poffInfo->fileHeader, sizeof(poffFileHeader_t), |
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1, poffFile); |
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if (entriesRead != 1) |
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{ |
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return ePOFFREADERROR; |
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} |
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/* The POFF file is retained in big-endian order. Fixup fields as necessary */ |
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poffSwapFileHeader(&poffInfo->fileHeader); |
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/* Verify that this is a valid POFF header */ |
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if ((poffInfo->fileHeader.fh_ident[FHI_MAG0] != FHI_POFF_MAG0) || |
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(poffInfo->fileHeader.fh_ident[FHI_MAG1] != FHI_POFF_MAG1) || |
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(poffInfo->fileHeader.fh_ident[FHI_MAG2] != FHI_POFF_MAG2) || |
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(poffInfo->fileHeader.fh_ident[FHI_MAG3] != FHI_POFF_MAG3) || |
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(poffInfo->fileHeader.fh_version != FHV_CURRENT)) |
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{ |
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return ePOFFBADFORMAT; |
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} |
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return eNOERROR; |
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} |
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/***********************************************************************/ |
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/* Read and verify all of the POFF section headers */ |
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static uint16_t poffReadSectionHeaders(poffHandle_t handle, FILE *poffFile) |
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{ |
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poffInfo_t *poffInfo = (poffInfo_t*)handle; |
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poffSectionHeader_t sectionHeader; |
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poffSectionHeader_t *dest; |
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long offset; |
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size_t entriesRead; |
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int i; |
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offset = poffInfo->fileHeader.fh_shoff; |
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for (i = 0; i < poffInfo->fileHeader.fh_shnum; i++) |
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{ |
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/* Seek to the beginning of the next section header */ |
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if (fseek(poffFile, offset, SEEK_SET) != 0) |
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{ |
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return ePOFFREADERROR; |
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} |
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/* Read the section header */ |
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entriesRead = fread(§ionHeader, sizeof(poffSectionHeader_t), |
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1, poffFile); |
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if (entriesRead != 1) |
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{ |
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return ePOFFREADERROR; |
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} |
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/* The POFF file is retained in big-endian order. Fixup fields as necessary */ |
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poffSwapSectionHeader(§ionHeader); |
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/* Copy the section header to the correct location */ |
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switch (sectionHeader.sh_type) |
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{ |
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case SHT_PROGDATA : /* Program data */ |
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if ((sectionHeader.sh_flags & SHF_EXEC) != 0) |
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dest = &poffInfo->progSection; |
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else |
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dest = &poffInfo->roDataSection; |
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break; |
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case SHT_SYMTAB : /* Symbol table */ |
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dest = &poffInfo->symbolTableSection; |
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break; |
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case SHT_STRTAB : /* String table */ |
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dest = &poffInfo->stringTableSection; |
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break; |
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case SHT_REL : /* Relocation data */ |
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dest = &poffInfo->relocSection; |
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break; |
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case SHT_FILETAB : /* File table */ |
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dest = &poffInfo->fileNameTableSection; |
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break; |
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case SHT_LINENO : /* Line number data */ |
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dest = &poffInfo->lineNumberSection; |
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break; |
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case SHT_DEBUG : /* Debug function info data */ |
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dest = &poffInfo->debugFuncSection; |
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break; |
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default: |
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return ePOFFREADERROR; |
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} |
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memcpy(dest, §ionHeader, sizeof(poffSectionHeader_t)); |
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/* Get the offset to the next section */ |
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offset += poffInfo->fileHeader.fh_shsize; |
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} |
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return eNOERROR; |
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} |
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/***********************************************************************/ |
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/* Read and buffer all of the POFF section data */ |
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static uint16_t poffReadSectionData(poffSectionHeader_t *shdr, |
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uint8_t **sdata, FILE *poffFile) |
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{ |
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size_t entriesRead; |
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/* Seek to the beginning of the section data */ |
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if (fseek(poffFile, shdr->sh_offset, SEEK_SET) != 0) |
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{ |
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return ePOFFREADERROR; |
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} |
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/* Allocate memory to hold the section data */ |
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*sdata = (uint8_t*)malloc(shdr->sh_size); |
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if (*sdata == NULL) |
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{ |
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return eNOMEMORY; |
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} |
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/* Read the section data */ |
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entriesRead = fread(*sdata, 1, shdr->sh_size, poffFile); |
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if (entriesRead != shdr->sh_size) |
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{ |
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return ePOFFREADERROR; |
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} |
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return eNOERROR; |
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} |
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/***********************************************************************/ |
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/* Read and buffer all of the POFF section data */ |
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static uint16_t poffReadAllSectionData(poffHandle_t handle, FILE *poffFile) |
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{ |
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poffInfo_t *poffInfo = (poffInfo_t*)handle; |
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uint16_t retval = eNOERROR; |
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if (HAVE_PROGRAM_SECTION) |
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{ |
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retval = poffReadSectionData(&poffInfo->progSection, |
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(uint8_t**)&poffInfo->progSectionData, |
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poffFile); |
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} |
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if ((retval == eNOERROR) && (HAVE_RODATA_SECTION)) |
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{ |
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retval = poffReadSectionData(&poffInfo->roDataSection, |
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(uint8_t**)&poffInfo->roDataSectionData, |
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poffFile); |
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} |
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if ((retval == eNOERROR) && (HAVE_SYMBOL_TABLE)) |
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{ |
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retval = poffReadSectionData(&poffInfo->symbolTableSection, |
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(uint8_t**)&poffInfo->symbolTable, |
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poffFile); |
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#ifdef CONFIG_POFF_SWAPNEEDED |
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if (retval == eNOERROR) |
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{ |
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poffSwapSymbolTableData(poffInfo); |
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} |
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#endif |
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} |
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if ((retval == eNOERROR) && (HAVE_STRING_TABLE)) |
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{ |
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retval = poffReadSectionData(&poffInfo->stringTableSection, |
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(uint8_t**)&poffInfo->stringTable, |
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poffFile); |
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} |
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if ((retval == eNOERROR) && (HAVE_RELOC_SECTION)) |
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{ |
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retval = poffReadSectionData(&poffInfo->relocSection, |
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(uint8_t**)&poffInfo->relocTable, |
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poffFile); |
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#ifdef CONFIG_POFF_SWAPNEEDED |
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if (retval == eNOERROR) |
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{ |
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poffSwapRelocationData(poffInfo); |
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} |
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#endif |
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} |
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if ((retval == eNOERROR) && (HAVE_FILE_TABLE)) |
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{ |
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retval = poffReadSectionData(&poffInfo->fileNameTableSection, |
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(uint8_t**)&poffInfo->fileNameTable, |
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poffFile); |
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#ifdef CONFIG_POFF_SWAPNEEDED |
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if (retval == eNOERROR) |
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{ |
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poffSwapFileTableData(poffInfo); |
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} |
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#endif |
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} |
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if ((retval == eNOERROR) && (HAVE_LINE_NUMBER)) |
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{ |
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retval = poffReadSectionData(&poffInfo->lineNumberSection, |
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(uint8_t**)&poffInfo->lineNumberTable, |
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poffFile); |
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#ifdef CONFIG_POFF_SWAPNEEDED |
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if (retval == eNOERROR) |
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{ |
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poffSwapLineNumberData(poffInfo); |
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} |
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#endif |
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} |
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if ((retval == eNOERROR) && (HAVE_DEBUG_SECTION)) |
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{ |
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retval = poffReadSectionData(&poffInfo->debugFuncSection, |
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(uint8_t**)&poffInfo->debugFuncTable, |
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poffFile); |
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#ifdef CONFIG_POFF_SWAPNEEDED |
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if (retval == eNOERROR) |
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{ |
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poffSwapDebugData(poffInfo); |
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} |
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#endif |
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} |
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return retval; |
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} |
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/*********************************************************************** |
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* Public Functions |
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***********************************************************************/ |
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/***********************************************************************/ |
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/* Set all global data structures to a known state */ |
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uint16_t poffReadFile(poffHandle_t handle, FILE *poffFile) |
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{ |
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uint16_t retVal; |
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/* Read the POFF header file */ |
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retVal = poffReadFileHeader(handle, poffFile); |
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if (retVal == eNOERROR) |
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{ |
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retVal = poffReadSectionHeaders(handle, poffFile); |
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if (retVal == eNOERROR) |
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{ |
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retVal = poffReadAllSectionData(handle, poffFile); |
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} |
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} |
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return retVal; |
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} |
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/***********************************************************************/
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