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185 lines
9.2 KiB
C
185 lines
9.2 KiB
C
/****
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**** Template for generating a main.c. Edit markers have replaced some items in the original file
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****
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**** Copyright © 2009 B Labs Ltd
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****
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**** Author: Russel Winder.
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****/
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/*******************************************************************************
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* Filename: src/main.c *
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* Description: Elf-loader - ELF file kernel/application bootstraper, main *
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* source file. *
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* Authors: Adam 'WeirdArms' Wiggins <awiggins@cse.unsw.edu.au>. *
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* Created: 2004-12-01 *
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********************************************************************************
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* *
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* Australian Public Licence B (OZPLB) *
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* *
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* Version 1-0 *
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* *
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* Copyright (c) 2004 - 2005 University of New South Wales, Australia *
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* *
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* All rights reserved. *
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* *
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* Developed by: Operating Systems, Embedded and *
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* Distributed Systems Group (DiSy) *
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* University of New South Wales *
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* http://www.disy.cse.unsw.edu.au *
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* *
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* Permission is granted by University of New South Wales, free of charge, to *
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* any person obtaining a copy of this software and any associated *
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* documentation files (the "Software") to deal with the Software without *
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* restriction, including (without limitation) the rights to use, copy, *
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* modify, adapt, merge, publish, distribute, communicate to the public, *
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* sublicense, and/or sell, lend or rent out copies of the Software, and *
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* to permit persons to whom the Software is furnished to do so, subject *
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* to the following conditions: *
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* *
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* * Redistributions of source code must retain the above copyright *
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* notice, this list of conditions and the following disclaimers. *
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* *
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* * Redistributions in binary form must reproduce the above *
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* copyright notice, this list of conditions and the following *
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* disclaimers in the documentation and/or other materials provided *
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* with the distribution. *
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* *
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* * Neither the name of University of New South Wales, nor the names of *
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* its contributors, may be used to endorse or promote products derived *
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* from this Software without specific prior written permission. *
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* *
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* EXCEPT AS EXPRESSLY STATED IN THIS LICENCE AND TO THE FULL EXTENT *
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* PERMITTED BY APPLICABLE LAW, THE SOFTWARE IS PROVIDED "AS-IS", AND *
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* NATIONAL ICT AUSTRALIA AND ITS CONTRIBUTORS MAKE NO REPRESENTATIONS, *
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* WARRANTIES OR CONDITIONS OF ANY KIND, EXPRESS OR IMPLIED, INCLUDING *
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* BUT NOT LIMITED TO ANY REPRESENTATIONS, WARRANTIES OR CONDITIONS *
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* REGARDING THE CONTENTS OR ACCURACY OF THE SOFTWARE, OR OF TITLE, *
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* MERCHANTABILITY, FITNESS FOR A PARTICULAR PURPOSE, NONINFRINGEMENT, *
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* THE ABSENCE OF LATENT OR OTHER DEFECTS, OR THE PRESENCE OR ABSENCE OF *
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* ERRORS, WHETHER OR NOT DISCOVERABLE. *
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* *
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* TO THE FULL EXTENT PERMITTED BY APPLICABLE LAW, IN NO EVENT SHALL *
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* NATIONAL ICT AUSTRALIA OR ITS CONTRIBUTORS BE LIABLE ON ANY LEGAL *
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* THEORY (INCLUDING, WITHOUT LIMITATION, IN AN ACTION OF CONTRACT, *
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* NEGLIGENCE OR OTHERWISE) FOR ANY CLAIM, LOSS, DAMAGES OR OTHER *
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* LIABILITY, INCLUDING (WITHOUT LIMITATION) LOSS OF PRODUCTION OR *
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* OPERATION TIME, LOSS, DAMAGE OR CORRUPTION OF DATA OR RECORDS; OR LOSS *
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* OF ANTICIPATED SAVINGS, OPPORTUNITY, REVENUE, PROFIT OR GOODWILL, OR *
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* OTHER ECONOMIC LOSS; OR ANY SPECIAL, INCIDENTAL, INDIRECT, *
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* CONSEQUENTIAL, PUNITIVE OR EXEMPLARY DAMAGES, ARISING OUT OF OR IN *
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* CONNECTION WITH THIS LICENCE, THE SOFTWARE OR THE USE OF OR OTHER *
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* DEALINGS WITH THE SOFTWARE, EVEN IF NATIONAL ICT AUSTRALIA OR ITS *
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* CONTRIBUTORS HAVE BEEN ADVISED OF THE POSSIBILITY OF SUCH CLAIM, LOSS, *
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* DAMAGES OR OTHER LIABILITY. *
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* *
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* If applicable legislation implies representations, warranties, or *
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* conditions, or imposes obligations or liability on University of New South *
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* Wales or one of its contributors in respect of the Software that *
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* cannot be wholly or partly excluded, restricted or modified, the *
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* liability of University of New South Wales or the contributor is limited, to *
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* the full extent permitted by the applicable legislation, at its *
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* option, to: *
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* a. in the case of goods, any one or more of the following: *
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* i. the replacement of the goods or the supply of equivalent goods; *
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* ii. the repair of the goods; *
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* iii. the payment of the cost of replacing the goods or of acquiring *
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* equivalent goods; *
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* iv. the payment of the cost of having the goods repaired; or *
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* b. in the case of services: *
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* i. the supplying of the services again; or *
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* ii. the payment of the cost of having the services supplied again. *
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* *
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* The construction, validity and performance of this licence is governed *
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* by the laws in force in New South Wales, Australia. *
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* *
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*******************************************************************************/
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#include <elf/elf.h>
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#include <stdio.h>
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#include <stdlib.h>
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#include "arch.h"
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/*****************
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* Extern symbols *
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*****************/
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/* Variable declarations added here for symbols defined by the linker scripts. */
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__EXTERNAL_SYMBOLS_EDIT_MARKER__
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/* This is a kernel symbol exported to loader's linker script from kernel build */
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extern char bkpt_phys_to_virt[];
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/*****************************
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* Local function prototypes. *
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*****************************/
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static void load_image(void **entry, char *start, char *end);
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int
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main(void)
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{
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/* Declarations added here.*/
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__DECLARATIONS_EDIT_MARKER__
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arch_init();
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printf("elf-loader:\tStarted\n");
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/* Loader statements added here. */
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__LOAD_STATEMENTS_EDIT_MARKER__
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printf("elf-loader:\tkernel entry point is %p\n", kernel_entry);
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arch_start_kernel(kernel_entry);
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printf("elf-loader:\tKernel start failed!\n");
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return -1;
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}
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/*******************
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* Local functions. *
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*******************/
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static void
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load_image(void** entry, char *start, char *end)
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{
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if(start == end) {
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printf("elf-loader: error, dite image is empty!\n");
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return;
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}
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/* awiggins (2004-12-21): Should probably add an alignment check? */
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/** awiggins (2005-05-29): Probably should add checks to see
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* the correct kind of elf file is being loaded for the platform,
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* or does the elf library do that somewhere?.
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*/
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if(!elf32_checkFile((struct Elf32_Header*)start)) {
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// printf("32-bit elf image detected.\n");
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*entry = (void*)(uintptr_t)
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elf32_getEntryPoint((struct Elf32_Header*)start);
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printf("Entry point: %p\n", *entry);
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} else if(!elf64_checkFile((struct Elf64_Header*)start)) {
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*entry =
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(void*)(uintptr_t)elf64_getEntryPoint((struct Elf64_Header*)start);
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} else {
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printf("elf-loader: error, dite image not a valid elf file!\n");
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return;
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}
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#ifdef __PPC64__
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if (arch_claim_memory((struct Elf32_Header*)start)) {
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printf("could not claim memory for elf file!\n");
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return;
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}
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#endif
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//printf("Start: %p\n", start);
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//printf("End: %p\n", end);
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if(!elf_loadFile(start, true)) {
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printf("elf-loader: error, unable to load dite image!\n");
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return;
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}
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}
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