forked from Archive/PX4-Autopilot
542 lines
17 KiB
C
542 lines
17 KiB
C
/**********************************************************************
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* libpoff/pfwrite.c
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* Write a POFF file
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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 <string.h>
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#include <errno.h>
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#include "keywords.h" /* Standard types */
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#include "pedefs.h" /* error code 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 poffCountSections(poffHandle_t handle);
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static void poffWriteFileHeader(poffHandle_t handle, FILE *poffFile);
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static void poffWriteSectionHeaders(poffHandle_t handle, FILE *poffFile);
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static void poffWriteSectionData(poffHandle_t handle, FILE *poffFile);
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/***********************************************************************
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* Private Functions
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***********************************************************************/
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static uint16_t poffCountSections(poffHandle_t handle)
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{
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poffInfo_t *poffInfo = (poffInfo_t*)handle;
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uint16_t nSections = 1; /* We always write the string table */
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/* Count each other section that has stored data */
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if (HAVE_PROGRAM_SECTION)
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nSections++;
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if (HAVE_RODATA_SECTION)
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nSections++;
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if (HAVE_SYMBOL_TABLE)
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nSections++;
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if (HAVE_RELOC_SECTION)
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nSections++;
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if (HAVE_FILE_TABLE)
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nSections++;
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if (HAVE_LINE_NUMBER)
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nSections++;
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if (HAVE_DEBUG_SECTION)
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nSections++;
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return nSections;
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}
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/***********************************************************************/
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static void poffWriteFileHeader(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 entriesWritten;
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/* Get the number of section structures following the file header */
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poffInfo->fileHeader.fh_shnum = poffCountSections(handle);
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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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/* Write the POFF file header */
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entriesWritten = fwrite(&poffInfo->fileHeader, sizeof(poffFileHeader_t),
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1, poffFile);
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if (entriesWritten != 1)
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{
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errmsg("Failed to write POFF header: %s\n", strerror(errno));
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fatal(ePOFFWRITEERROR);
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}
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/* Restore fields to host order */
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poffSwapFileHeader(&poffInfo->fileHeader);
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}
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/***********************************************************************/
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static size_t poffWriteSectionHeader(poffSectionHeader_t *pheader, FILE *poffFile)
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{
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size_t entriesWritten;
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/* The POFF file is retained in big-endian order. Fixup fields as necessary */
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poffSwapSectionHeader(pheader);
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/* Write the POFF section header */
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entriesWritten = fwrite(pheader, sizeof(poffSectionHeader_t), 1, poffFile);
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/* Restore fields to host order */
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poffSwapSectionHeader(pheader);
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return entriesWritten;
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}
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/***********************************************************************/
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static void poffWriteSectionHeaders(poffHandle_t handle, FILE *poffFile)
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{
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poffInfo_t *poffInfo = (poffInfo_t*)handle;
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/* The data starts immediately after the file header and the array
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* of section headers.
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*/
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uint32_t dataOffset = poffInfo->fileHeader.fh_shoff +
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poffInfo->fileHeader.fh_shnum * poffInfo->fileHeader.fh_shsize;
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size_t entriesWritten;
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/* Write the program section header (if we have one) */
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if (HAVE_PROGRAM_SECTION)
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{
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/* Add the name of the section to the string table */
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poffInfo->progSection.sh_name = poffAddString(handle, ".text");
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poffInfo->progSection.sh_offset = dataOffset;
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dataOffset += poffInfo->progSection.sh_size;
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/* Then write the section header to the output file */
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entriesWritten = poffWriteSectionHeader(&poffInfo->progSection, poffFile);
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if (entriesWritten != 1)
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{
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errmsg("Failed to write program section header: %s\n",
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strerror(errno));
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fatal(ePOFFWRITEERROR);
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}
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}
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/* Write the initialized read-only data section header (if we have one) */
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if (HAVE_RODATA_SECTION)
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{
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/* Add the name of the section to the string table */
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poffInfo->roDataSection.sh_name = poffAddString(handle, ".rodata");
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poffInfo->roDataSection.sh_offset = dataOffset;
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dataOffset += poffInfo->roDataSection.sh_size;
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/* Then write the section header to the output file */
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entriesWritten = poffWriteSectionHeader(&poffInfo->roDataSection, poffFile);
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if (entriesWritten != 1)
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{
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errmsg("Failed to write data section header: %s\n",
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strerror(errno));
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fatal(ePOFFWRITEERROR);
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}
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}
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/* Write the symbol table section header (if we have one) */
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if (HAVE_SYMBOL_TABLE)
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{
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/* Add the name of the section to the string table */
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poffInfo->symbolTableSection.sh_name = poffAddString(handle, ".symtab");
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poffInfo->symbolTableSection.sh_offset = dataOffset;
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dataOffset += poffInfo->symbolTableSection.sh_size;
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/* Then write the section header to the output file */
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entriesWritten = poffWriteSectionHeader(&poffInfo->symbolTableSection, poffFile);
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if (entriesWritten != 1)
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{
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errmsg("Failed to write symbol table section header: %s\n",
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strerror(errno));
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fatal(ePOFFWRITEERROR);
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}
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}
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/* Write the relocation table section header (if we have one) */
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if (HAVE_RELOC_SECTION)
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{
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/* Add the name of the section to the string table */
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poffInfo->relocSection.sh_name = poffAddString(handle, ".rel");
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poffInfo->relocSection.sh_offset = dataOffset;
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dataOffset += poffInfo->relocSection.sh_size;
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/* Then write the section header to the output file */
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entriesWritten = poffWriteSectionHeader(&poffInfo->relocSection, poffFile);
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if (entriesWritten != 1)
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{
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errmsg("Failed to write relocation section header: %s\n",
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strerror(errno));
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fatal(ePOFFWRITEERROR);
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}
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}
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/* Write the file table section header (if we have one) */
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if (HAVE_FILE_TABLE)
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{
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/* Add the name of the section to the string table */
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poffInfo->fileNameTableSection.sh_name = poffAddString(handle, ".filetab");
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poffInfo->fileNameTableSection.sh_offset = dataOffset;
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dataOffset += poffInfo->fileNameTableSection.sh_size;
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/* Then write the section header to the output file */
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entriesWritten = poffWriteSectionHeader(&poffInfo->fileNameTableSection, poffFile);
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if (entriesWritten != 1)
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{
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errmsg("Failed to write file table section header: %s\n",
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strerror(errno));
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fatal(ePOFFWRITEERROR);
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}
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}
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/* Write the line number section header (if we have one) */
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if (HAVE_LINE_NUMBER)
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{
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/* Add the name of the section to the string table */
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poffInfo->lineNumberSection.sh_name = poffAddString(handle, ".lineno");
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poffInfo->lineNumberSection.sh_offset = dataOffset;
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dataOffset += poffInfo->lineNumberSection.sh_size;
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/* Then write the section header to the output file */
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entriesWritten = poffWriteSectionHeader(&poffInfo->lineNumberSection, poffFile);
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if (entriesWritten != 1)
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{
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errmsg("Failed to write line number section header: %s\n",
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strerror(errno));
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fatal(ePOFFWRITEERROR);
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}
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}
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/* Write the debug function info section header (if we have one) */
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if (HAVE_DEBUG_SECTION)
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{
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/* Add the name of the section to the string table */
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poffInfo->debugFuncSection.sh_name = poffAddString(handle, ".dbgfunc");
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poffInfo->debugFuncSection.sh_offset = dataOffset;
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dataOffset += poffInfo->debugFuncSection.sh_size;
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/* Then write the section header to the output file */
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entriesWritten = poffWriteSectionHeader(&poffInfo->debugFuncSection, poffFile);
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if (entriesWritten != 1)
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{
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errmsg("Failed to write debug section header: %s\n",
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strerror(errno));
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fatal(ePOFFWRITEERROR);
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}
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}
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/* Write the string table section header LAST (because we may have
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* added strings with the above logic.
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*/
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/* Add the name of the section to the string table */
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poffInfo->stringTableSection.sh_name = poffAddString(handle, ".strtab");
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poffInfo->stringTableSection.sh_offset = dataOffset;
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dataOffset += poffInfo->stringTableSection.sh_size;
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/* Then write the section header to the output file */
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entriesWritten = poffWriteSectionHeader(&poffInfo->stringTableSection, poffFile);
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if (entriesWritten != 1)
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{
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errmsg("Failed to write string table section header: %s\n",
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strerror(errno));
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fatal(ePOFFWRITEERROR);
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}
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}
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/***********************************************************************/
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static void poffWriteSectionData(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 entriesWritten;
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/* Write the program section data (if we have one) */
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if (HAVE_PROGRAM_SECTION)
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{
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if (!poffInfo->progSectionData) fatal(ePOFFCONFUSION);
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entriesWritten = fwrite(poffInfo->progSectionData, sizeof(uint8_t),
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poffInfo->progSection.sh_size, poffFile);
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if (entriesWritten != poffInfo->progSection.sh_size)
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{
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errmsg("Failed to write program data: %s\n",
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strerror(errno));
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fatal(ePOFFWRITEERROR);
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}
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}
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/* Write the read-only data section data (if we have one) */
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if (HAVE_RODATA_SECTION)
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{
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if (!poffInfo->roDataSectionData) fatal(ePOFFCONFUSION);
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entriesWritten = fwrite(poffInfo->roDataSectionData, sizeof(uint8_t),
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poffInfo->roDataSection.sh_size, poffFile);
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if (entriesWritten != poffInfo->roDataSection.sh_size)
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{
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errmsg("Failed to write initialized data: %s\n",
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strerror(errno));
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fatal(ePOFFWRITEERROR);
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}
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}
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/* Write the symbol table section data (if we have one) */
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if (HAVE_SYMBOL_TABLE)
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{
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if (!poffInfo->symbolTable) fatal(ePOFFCONFUSION);
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/* The POFF file is retained in big-endian order. Fixup fields as necessary */
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poffSwapSymbolTableData(poffInfo);
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/* Write the symbol table entries in big-endian order */
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entriesWritten = fwrite(poffInfo->symbolTable, sizeof(uint8_t),
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poffInfo->symbolTableSection.sh_size, poffFile);
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if (entriesWritten != poffInfo->symbolTableSection.sh_size)
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{
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errmsg("Failed to write symbol table data: %s\n",
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strerror(errno));
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fatal(ePOFFWRITEERROR);
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}
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/* Restore host data order */
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poffSwapSymbolTableData(poffInfo);
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}
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/* Write the relocation table section data (if we have one) */
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if (HAVE_RELOC_SECTION)
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{
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if (!poffInfo->relocTable) fatal(ePOFFCONFUSION);
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/* The POFF file is retained in big-endian order. Fixup fields as necessary */
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poffSwapRelocationData(poffInfo);
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/* Write the relocation table entries in big-endian order */
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entriesWritten = fwrite(poffInfo->relocTable, sizeof(uint8_t),
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poffInfo->relocSection.sh_size, poffFile);
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if (entriesWritten != poffInfo->relocSection.sh_size)
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{
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errmsg("Failed to write relocation data: %s\n",
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strerror(errno));
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fatal(ePOFFWRITEERROR);
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}
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/* Restore host data order */
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poffSwapRelocationData(poffInfo);
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}
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/* Write the file table section data (if we have one) */
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if (HAVE_FILE_TABLE)
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{
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if (!poffInfo->fileNameTable) fatal(ePOFFCONFUSION);
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/* The POFF file is retained in big-endian order. Fixup fields as necessary */
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poffSwapFileTableData(poffInfo);
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/* Write the file table entries in big-endian order */
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entriesWritten = fwrite(poffInfo->fileNameTable, sizeof(uint8_t),
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poffInfo->fileNameTableSection.sh_size,
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poffFile);
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if (entriesWritten != poffInfo->fileNameTableSection.sh_size)
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{
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errmsg("Failed to write filename table data: %s\n",
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strerror(errno));
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fatal(ePOFFWRITEERROR);
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}
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/* Restore host data order */
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poffSwapFileTableData(poffInfo);
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}
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/* Write the line number section data (if we have one) */
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if (HAVE_LINE_NUMBER)
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{
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if (!poffInfo->lineNumberTable) fatal(ePOFFCONFUSION);
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/* The POFF file is retained in big-endian order. Fixup fields as necessary */
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poffSwapLineNumberData(poffInfo);
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/* Write the line number table entries in big-endian order */
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entriesWritten = fwrite(poffInfo->lineNumberTable, sizeof(uint8_t),
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poffInfo->lineNumberSection.sh_size,
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poffFile);
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if (entriesWritten != poffInfo->lineNumberSection.sh_size)
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{
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errmsg("Failed to write line number table data: %s\n",
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strerror(errno));
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fatal(ePOFFWRITEERROR);
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}
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/* Restore host order */
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poffSwapLineNumberData(poffInfo);
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}
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/* Write the debug section data (if we have one) */
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if (HAVE_DEBUG_SECTION)
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{
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if (!poffInfo->debugFuncTable) fatal(ePOFFCONFUSION);
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/* The POFF file is retained in big-endian order. Fixup fields as necessary */
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poffSwapDebugData(poffInfo);
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/* Write the debug entries in big-endian order */
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entriesWritten = fwrite(poffInfo->debugFuncTable, sizeof(uint8_t),
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poffInfo->debugFuncSection.sh_size,
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poffFile);
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if (entriesWritten != poffInfo->debugFuncSection.sh_size)
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{
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errmsg("Failed to write debug table data: %s\n",
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strerror(errno));
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fatal(ePOFFWRITEERROR);
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}
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/* Restore host order */
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poffSwapDebugData(poffInfo);
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}
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/* Write the string table section data LAST (because we may have
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* added strings with the above logic.
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*/
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if (!poffInfo->stringTable) fatal(ePOFFCONFUSION);
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entriesWritten = fwrite(poffInfo->stringTable, sizeof(uint8_t),
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poffInfo->stringTableSection.sh_size, poffFile);
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if (entriesWritten != poffInfo->stringTableSection.sh_size)
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{
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errmsg("Failed to write string table data: %s\n",
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strerror(errno));
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fatal(ePOFFWRITEERROR);
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}
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}
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/***********************************************************************
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* Public Functions
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***********************************************************************/
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void poffWriteFile(poffHandle_t handle, FILE *poffFile)
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{
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poffWriteFileHeader(handle, poffFile);
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poffWriteSectionHeaders(handle, poffFile);
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poffWriteSectionData(handle, poffFile);
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}
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/***********************************************************************/
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