/* * Copyright (c) 2005, Swedish Institute of Computer Science * Copyright (c) 2007, Simon Berg * All rights reserved. * * 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 of the Institute 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 INSTITUTE 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 INSTITUTE 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. * * This file is part of the Contiki operating system. * */ /** * \addtogroup elfloader * @{ */ /** * \defgroup elfloaderarch Architecture specific functionality for the ELF loader. * * The architecture specific functionality for the Contiki ELF loader * has to be implemented for each processor type Contiki runs on. * * Since the ELF format is slightly different for different processor * types, the Contiki ELF loader is divided into two parts: the * generic ELF loader module (\ref elfloader) and the architecture * specific part (this module). The architecture specific part deals * with memory allocation, code and data relocation, and writing the * relocated ELF code into program memory. * * To port the Contiki ELF loader to a new processor type, this module * has to be implemented for the new processor type. * * @{ */ /** * \file * Header file for the architecture specific parts of the Contiki ELF loader. * * \author * Adam Dunkels <adam@sics.se> * */ #ifndef ELFLOADER_ARCH_H_ #define ELFLOADER_ARCH_H_ #include "elfloader-otf.h" /** * \brief Perform a relocation. * \param input_fd The file descriptor for the ELF file. * \param output The output object for the segment. * \param sectionoffset The file offset at which the relocation can be found. * \param sectionaddr The section start address (absolute runtime). * \param rela A pointer to an ELF32 rela structure (struct elf32_rela). * \param addr The relocated address. * * This function is called from the Contiki ELF loader to * perform a relocation on a piece of code or data. The * relocated address is calculated by the Contiki ELF * loader, based on information in the ELF file, and it is * the responsibility of this function to patch the * executable code. The Contiki ELF loader passes a * pointer to an ELF32 rela structure (struct elf32_rela) * that contains information about how to patch the * code. This information is different from processor to * processor. */ int elfloader_arch_relocate(int input_fd, struct elfloader_output *output, unsigned int sectionoffset, char *sectionaddr, struct elf32_rela *rela, char *addr); #endif /* ELFLOADER_ARCH_H_ */ /** @} */ /** @} */