nes-proj/core/loader/elfloader-avr.c

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/*
* Copyright (c) 2005, Swedish Institute of Computer Science
* 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.
*
* @(#)$Id: elfloader-avr.c,v 1.3 2006/12/18 14:54:04 fros4943 Exp $
*/
#include "elfloader-arch.h"
/*#include "dev/flash.h"*/
#define R_AVR_NONE 0
#define R_AVR_32 1
#define R_AVR_7_PCREL 2
#define R_AVR_13_PCREL 3
#define R_AVR_16 4
#define R_AVR_16_PM 5
#define R_AVR_LO8_LDI 6
#define R_AVR_HI8_LDI 7
#define R_AVR_HH8_LDI 8
#define R_AVR_LO8_LDI_NEG 9
#define R_AVR_HI8_LDI_NEG 10
#define R_AVR_HH8_LDI_NEG 11
#define R_AVR_LO8_LDI_PM 12
#define R_AVR_HI8_LDI_PM 13
#define R_AVR_HH8_LDI_PM 14
#define R_AVR_LO8_LDI_PM_NEG 15
#define R_AVR_HI8_LDI_PM_NEG 16
#define R_AVR_HH8_LDI_PM_NEG 17
#define R_AVR_CALL 18
#define ELF32_R_TYPE(info) ((unsigned char)(info))
static char datamemory[ELFLOADER_DATAMEMORY_SIZE];
static const char textmemory[ELFLOADER_TEXTMEMORY_SIZE];
/*---------------------------------------------------------------------------*/
void *
elfloader_arch_allocate_ram(int size)
{
return datamemory;
}
/*---------------------------------------------------------------------------*/
void *
elfloader_arch_allocate_rom(int size)
{
/* Return an 512-byte aligned pointer. */
return (char *)
((unsigned long)&textmemory[0] & 0xfffffe00) +
(((unsigned long)&textmemory[0] & 0x1ff) == 0? 0: 0x200);
}
/*---------------------------------------------------------------------------*/
#define READSIZE 32
void
elfloader_arch_write_rom(int fd, unsigned short textoff, unsigned int size, char *mem)
{
#if 0
int i;
unsigned int ptr;
unsigned short *flashptr;
flash_setup();
flashptr = (unsigned short *)elfloader_arch_textmemory;
cfs_seek(fd, textoff);
for(ptr = 0; ptr < size; ptr += READSIZE) {
/* Read data from file into RAM. */
cfs_read(fd, (unsigned char *)elfloader_arch_datamemory, READSIZE);
/* Clear flash page on 512 byte boundary. */
if((((unsigned short)flashptr) & 0x01ff) == 0) {
flash_clear(flashptr);
}
/* Burn data from RAM into flash ROM. Flash is burned one 16-bit
word at a time, so we need to be careful when incrementing
pointers. The flashptr is already a short pointer, so
incrementing it by one will actually increment the address by
two. */
for(i = 0; i < READSIZE / 2; ++i) {
flash_write(flashptr, ((unsigned short *)elfloader_arch_datamemory)[i]);
++flashptr;
}
}
flash_done();
#endif
}
/*---------------------------------------------------------------------------*/
static void
write_ldi(int fd, unsigned char *instr, unsigned char byte)
{
instr[0] = (instr[0] & 0xf0) | (byte & 0x0f);
instr[1] = (instr[0] & 0xf0) | (byte >> 4);
cfs_write(fd, instr, 2);
}
/*---------------------------------------------------------------------------*/
void
elfloader_arch_relocate(int fd, unsigned int sectionoffset,
char *sectionaddr,
struct elf32_rela *rela, char *addr)
{
unsigned int type;
unsigned char instr[4];
cfs_seek(fd, sectionoffset + rela->r_offset);
cfs_read(fd, instr, 4);
cfs_seek(fd, sectionoffset + rela->r_offset);
addr += rela->r_addend;
type = ELF32_R_TYPE(rela->r_info);
printf("elfloader_arch_relocate: type %d\n", type);
switch(type) {
case R_AVR_NONE:
case R_AVR_32:
case R_AVR_7_PCREL: /* >> 1 */
case R_AVR_13_PCREL: /* >> 1 */
printf("elfloader-avr.c: unsupported relocation type %d\n", type);
break;
case R_AVR_16:
cfs_write(fd, (char *)addr, 2);
break;
case R_AVR_16_PM:
addr = (char *)((unsigned long)addr >> 1);
cfs_write(fd, (char *)addr, 2);
break;
case R_AVR_LO8_LDI:
write_ldi(fd, instr, (unsigned long)addr);
break;
case R_AVR_HI8_LDI:
write_ldi(fd, instr, (unsigned long)addr >> 8);
break;
case R_AVR_HH8_LDI:
write_ldi(fd, instr, (unsigned long)addr >> 16);
break;
case R_AVR_LO8_LDI_NEG:
addr = (char *)(0 - (unsigned long)addr);
write_ldi(fd, instr, (unsigned long)addr);
break;
case R_AVR_HI8_LDI_NEG:
addr = (char *)(0 - (unsigned long)addr);
write_ldi(fd, instr, (unsigned long)addr >> 8);
break;
case R_AVR_HH8_LDI_NEG:
addr = (char *)(0 - (unsigned long)addr);
write_ldi(fd, instr, (unsigned long)addr >> 16);
break;
case R_AVR_LO8_LDI_PM:
write_ldi(fd, instr, (unsigned long)addr >> 1);
break;
case R_AVR_HI8_LDI_PM:
write_ldi(fd, instr, (unsigned long)addr >> 9);
break;
case R_AVR_HH8_LDI_PM:
write_ldi(fd, instr, (unsigned long)addr >> 17);
break;
case R_AVR_LO8_LDI_PM_NEG:
addr = (char *)(0 - (unsigned long)addr);
write_ldi(fd, instr, (unsigned long)addr >> 1);
break;
case R_AVR_HI8_LDI_PM_NEG:
addr = (char *)(0 - (unsigned long)addr);
write_ldi(fd, instr, (unsigned long)addr >> 9);
break;
addr = (char *)(0 - (unsigned long)addr);
case R_AVR_HH8_LDI_PM_NEG:
write_ldi(fd, instr, (unsigned long)addr >> 17);
break;
case R_AVR_CALL:
addr = (char *)((unsigned long)addr >> 1);
instr[3] = (unsigned long)addr >> 8;
instr[4] = (unsigned long)addr & 0xff;
printf("R_AVR_CALL:Writing 0x%02x 0x%02x 0x%02x 0x%02x\n",
instr[0], instr[1], instr[2], instr[3]);
cfs_write(fd, instr, 4);
break;
}
}
/*---------------------------------------------------------------------------*/