217 lines
6.9 KiB
C
217 lines
6.9 KiB
C
/*
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* Copyright (c) 2005, Swedish Institute of Computer Science
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* All rights reserved.
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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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* 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 the
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* documentation and/or other materials provided with the distribution.
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* 3. Neither the name of the Institute nor the names of its contributors
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* may be 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 INSTITUTE AND CONTRIBUTORS ``AS IS'' AND
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* ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
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* IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
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* ARE DISCLAIMED. IN NO EVENT SHALL THE INSTITUTE OR CONTRIBUTORS BE LIABLE
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* FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
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* DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS
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* OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
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* HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
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* LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY
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* OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
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* SUCH DAMAGE.
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*
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* This file is part of the Contiki operating system.
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*
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* @(#)$Id: elfloader-avr.c,v 1.3 2006/12/18 14:54:04 fros4943 Exp $
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*/
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#include "elfloader-arch.h"
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/*#include "dev/flash.h"*/
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#define R_AVR_NONE 0
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#define R_AVR_32 1
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#define R_AVR_7_PCREL 2
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#define R_AVR_13_PCREL 3
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#define R_AVR_16 4
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#define R_AVR_16_PM 5
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#define R_AVR_LO8_LDI 6
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#define R_AVR_HI8_LDI 7
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#define R_AVR_HH8_LDI 8
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#define R_AVR_LO8_LDI_NEG 9
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#define R_AVR_HI8_LDI_NEG 10
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#define R_AVR_HH8_LDI_NEG 11
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#define R_AVR_LO8_LDI_PM 12
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#define R_AVR_HI8_LDI_PM 13
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#define R_AVR_HH8_LDI_PM 14
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#define R_AVR_LO8_LDI_PM_NEG 15
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#define R_AVR_HI8_LDI_PM_NEG 16
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#define R_AVR_HH8_LDI_PM_NEG 17
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#define R_AVR_CALL 18
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#define ELF32_R_TYPE(info) ((unsigned char)(info))
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static char datamemory[ELFLOADER_DATAMEMORY_SIZE];
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static const char textmemory[ELFLOADER_TEXTMEMORY_SIZE];
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/*---------------------------------------------------------------------------*/
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void *
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elfloader_arch_allocate_ram(int size)
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{
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return datamemory;
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}
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/*---------------------------------------------------------------------------*/
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void *
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elfloader_arch_allocate_rom(int size)
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{
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/* Return an 512-byte aligned pointer. */
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return (char *)
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((unsigned long)&textmemory[0] & 0xfffffe00) +
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(((unsigned long)&textmemory[0] & 0x1ff) == 0? 0: 0x200);
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}
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/*---------------------------------------------------------------------------*/
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#define READSIZE 32
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void
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elfloader_arch_write_rom(int fd, unsigned short textoff, unsigned int size, char *mem)
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{
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#if 0
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int i;
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unsigned int ptr;
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unsigned short *flashptr;
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flash_setup();
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flashptr = (unsigned short *)elfloader_arch_textmemory;
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cfs_seek(fd, textoff);
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for(ptr = 0; ptr < size; ptr += READSIZE) {
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/* Read data from file into RAM. */
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cfs_read(fd, (unsigned char *)elfloader_arch_datamemory, READSIZE);
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/* Clear flash page on 512 byte boundary. */
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if((((unsigned short)flashptr) & 0x01ff) == 0) {
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flash_clear(flashptr);
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}
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/* Burn data from RAM into flash ROM. Flash is burned one 16-bit
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word at a time, so we need to be careful when incrementing
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pointers. The flashptr is already a short pointer, so
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incrementing it by one will actually increment the address by
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two. */
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for(i = 0; i < READSIZE / 2; ++i) {
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flash_write(flashptr, ((unsigned short *)elfloader_arch_datamemory)[i]);
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++flashptr;
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}
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}
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flash_done();
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#endif
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}
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/*---------------------------------------------------------------------------*/
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static void
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write_ldi(int fd, unsigned char *instr, unsigned char byte)
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{
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instr[0] = (instr[0] & 0xf0) | (byte & 0x0f);
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instr[1] = (instr[0] & 0xf0) | (byte >> 4);
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cfs_write(fd, instr, 2);
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}
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/*---------------------------------------------------------------------------*/
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void
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elfloader_arch_relocate(int fd, unsigned int sectionoffset,
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char *sectionaddr,
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struct elf32_rela *rela, char *addr)
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{
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unsigned int type;
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unsigned char instr[4];
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cfs_seek(fd, sectionoffset + rela->r_offset);
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cfs_read(fd, instr, 4);
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cfs_seek(fd, sectionoffset + rela->r_offset);
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addr += rela->r_addend;
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type = ELF32_R_TYPE(rela->r_info);
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printf("elfloader_arch_relocate: type %d\n", type);
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switch(type) {
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case R_AVR_NONE:
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case R_AVR_32:
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case R_AVR_7_PCREL: /* >> 1 */
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case R_AVR_13_PCREL: /* >> 1 */
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printf("elfloader-avr.c: unsupported relocation type %d\n", type);
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break;
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case R_AVR_16:
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cfs_write(fd, (char *)addr, 2);
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break;
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case R_AVR_16_PM:
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addr = (char *)((unsigned long)addr >> 1);
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cfs_write(fd, (char *)addr, 2);
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break;
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case R_AVR_LO8_LDI:
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write_ldi(fd, instr, (unsigned long)addr);
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break;
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case R_AVR_HI8_LDI:
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write_ldi(fd, instr, (unsigned long)addr >> 8);
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break;
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case R_AVR_HH8_LDI:
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write_ldi(fd, instr, (unsigned long)addr >> 16);
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break;
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case R_AVR_LO8_LDI_NEG:
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addr = (char *)(0 - (unsigned long)addr);
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write_ldi(fd, instr, (unsigned long)addr);
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break;
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case R_AVR_HI8_LDI_NEG:
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addr = (char *)(0 - (unsigned long)addr);
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write_ldi(fd, instr, (unsigned long)addr >> 8);
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break;
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case R_AVR_HH8_LDI_NEG:
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addr = (char *)(0 - (unsigned long)addr);
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write_ldi(fd, instr, (unsigned long)addr >> 16);
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break;
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case R_AVR_LO8_LDI_PM:
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write_ldi(fd, instr, (unsigned long)addr >> 1);
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break;
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case R_AVR_HI8_LDI_PM:
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write_ldi(fd, instr, (unsigned long)addr >> 9);
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break;
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case R_AVR_HH8_LDI_PM:
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write_ldi(fd, instr, (unsigned long)addr >> 17);
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break;
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case R_AVR_LO8_LDI_PM_NEG:
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addr = (char *)(0 - (unsigned long)addr);
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write_ldi(fd, instr, (unsigned long)addr >> 1);
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break;
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case R_AVR_HI8_LDI_PM_NEG:
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addr = (char *)(0 - (unsigned long)addr);
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write_ldi(fd, instr, (unsigned long)addr >> 9);
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break;
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addr = (char *)(0 - (unsigned long)addr);
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case R_AVR_HH8_LDI_PM_NEG:
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write_ldi(fd, instr, (unsigned long)addr >> 17);
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break;
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case R_AVR_CALL:
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addr = (char *)((unsigned long)addr >> 1);
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instr[3] = (unsigned long)addr >> 8;
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instr[4] = (unsigned long)addr & 0xff;
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printf("R_AVR_CALL:Writing 0x%02x 0x%02x 0x%02x 0x%02x\n",
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instr[0], instr[1], instr[2], instr[3]);
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cfs_write(fd, instr, 4);
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break;
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}
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}
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/*---------------------------------------------------------------------------*/
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