mirror of
https://github.com/oliverschmidt/contiki.git
synced 2024-12-22 10:30:13 +00:00
* Backwards compatible with elfloader.c but uses the new Contiki
link-editor. Taken together cle and elfloader_compat requires less ROM and RAM than the old version.
This commit is contained in:
bg-
parent
4f592bfc88
commit
4e62a35e83
196
core/loader/elfloader_compat.c
Normal file
196
core/loader/elfloader_compat.c
Normal file
@ -0,0 +1,196 @@
|
||||
/*
|
||||
* Copyright (c) 2006, 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_compat.c,v 1.1 2006/12/01 15:15:08 bg- Exp $
|
||||
*/
|
||||
|
||||
/*
|
||||
* This code is plug-in compatible with elfloader.c and is an example
|
||||
* of how the Contiki dynamic Link Editor (CLE) can be used.
|
||||
*/
|
||||
|
||||
#include <stdio.h>
|
||||
#include <stdlib.h>
|
||||
#include <string.h>
|
||||
|
||||
#include <sys/unistd.h>
|
||||
|
||||
#include "contiki.h"
|
||||
|
||||
#include "loader/elfloader.h"
|
||||
#include "loader/cle.h"
|
||||
|
||||
#include "lib/malloc.h"
|
||||
#include "dev/rom.h"
|
||||
#include "dev/xmem.h"
|
||||
|
||||
#define NDEBUG
|
||||
#include "lib/assert.h"
|
||||
|
||||
#ifdef NDEBUG
|
||||
#define PRINTF(...) do {} while (0)
|
||||
#else
|
||||
#define PRINTF(...) printf(__VA_ARGS__)
|
||||
#endif
|
||||
|
||||
struct process *elfloader_loaded_process;
|
||||
void (*elfloader_fini)(void);
|
||||
|
||||
#define IMAX(a, b) (((a) > (b)) ? (a) : (b))
|
||||
|
||||
static cle_addr datamemory;
|
||||
|
||||
#define TEXTMEMORY \
|
||||
(cle_addr)(((uintptr_t)(&_etext + 1) \
|
||||
+ (uintptr_t)&_edata - (uintptr_t)&__data_start \
|
||||
+ ROM_ERASE_UNIT_SIZE) \
|
||||
& ~(ROM_ERASE_UNIT_SIZE - 1))
|
||||
|
||||
char elfloader_unknown[30]; /* Name that caused link error. */
|
||||
|
||||
/*---------------------------------------------------------------------------*/
|
||||
int
|
||||
elfloader_load(off_t eepromaddr)
|
||||
{
|
||||
struct cle_info h;
|
||||
int ret;
|
||||
|
||||
void (*elfloader_init)(void);
|
||||
|
||||
elfloader_unknown[0] = 0;
|
||||
|
||||
/* The ELF header is located at the start of the buffer. */
|
||||
ret = cle_read_info(&h, xmem_pread, eepromaddr);
|
||||
|
||||
if(ret != ELFLOADER_OK) {
|
||||
memcpy(elfloader_unknown, h.name, sizeof(elfloader_unknown));
|
||||
elfloader_unknown[sizeof(elfloader_unknown) - 1] = 0;
|
||||
return ret;
|
||||
}
|
||||
|
||||
if(datamemory != NULL) {
|
||||
free(datamemory);
|
||||
}
|
||||
|
||||
/* We are making semi-permanent allocations, first compact heap! */
|
||||
malloc_compact();
|
||||
datamemory = malloc(IMAX(h.textsize, h.datasize + h.bsssize));
|
||||
if(datamemory == NULL) {
|
||||
return ELFLOADER_DATA_TO_LARGE; /* XXX or text to large */
|
||||
}
|
||||
|
||||
h.data = datamemory;
|
||||
h.bss = h.data + h.datasize;
|
||||
h.text = TEXTMEMORY;
|
||||
|
||||
PRINTF("elfloader: copy text segment to RAM %p %p\n",
|
||||
h.data, h.data + h.textsize);
|
||||
ret = xmem_pread(datamemory, h.textsize, eepromaddr + h.textoff);
|
||||
assert(ret > 0);
|
||||
if(h.textrelasize > 0) {
|
||||
PRINTF("elfloader: relocate text in RAM\n");
|
||||
ret = cle_relocate(&h,
|
||||
xmem_pread,
|
||||
eepromaddr,
|
||||
datamemory,
|
||||
h.textrelaoff, h.textrelasize);
|
||||
if(ret != ELFLOADER_OK) {
|
||||
memcpy(elfloader_unknown, h.name, sizeof(elfloader_unknown));
|
||||
elfloader_unknown[sizeof(elfloader_unknown) - 1] = 0;
|
||||
return ret;
|
||||
}
|
||||
}
|
||||
PRINTF("elfloader: copy text segment to ROM %p %p\n",
|
||||
h.text, h.text + h.textsize);
|
||||
ret = rom_erase((h.textsize+ROM_ERASE_UNIT_SIZE) & ~(ROM_ERASE_UNIT_SIZE-1),
|
||||
(uintptr_t)h.text);
|
||||
assert(ret > 0);
|
||||
ret = rom_pwrite(datamemory, h.textsize, (uintptr_t)h.text);
|
||||
assert(ret > 0);
|
||||
|
||||
PRINTF("elfloader: copy data segment to RAM %p %p\n",
|
||||
h.data, h.data + h.datasize);
|
||||
ret = xmem_pread(datamemory, h.datasize, eepromaddr + h.dataoff);
|
||||
assert(ret > 0);
|
||||
if(h.datarelasize > 0) {
|
||||
PRINTF("elfloader: relocate data segment\n");
|
||||
ret = cle_relocate(&h,
|
||||
xmem_pread,
|
||||
eepromaddr,
|
||||
datamemory,
|
||||
h.datarelaoff, h.datarelasize);
|
||||
if(ret != ELFLOADER_OK) {
|
||||
memcpy(elfloader_unknown, h.name, sizeof(elfloader_unknown));
|
||||
elfloader_unknown[sizeof(elfloader_unknown) - 1] = 0;
|
||||
return ret;
|
||||
}
|
||||
}
|
||||
|
||||
PRINTF("elfloader: zero bss %p %p\n", h.bss, h.bss + h.bsssize);
|
||||
memset(h.bss, 0, h.bsssize);
|
||||
|
||||
/* Find _init, _fini, and loaded_process. */
|
||||
elfloader_loaded_process = cle_lookup(&h, xmem_pread, eepromaddr,
|
||||
"process_load");
|
||||
elfloader_fini = cle_lookup(&h, xmem_pread, eepromaddr, "_fini");
|
||||
elfloader_init = cle_lookup(&h, xmem_pread, eepromaddr, "_init");
|
||||
|
||||
if(elfloader_init != NULL) {
|
||||
PRINTF("init=%p fini=%p\n", elfloader_init, elfloader_fini);
|
||||
(*elfloader_init)();
|
||||
elfloader_loaded_process = NULL;
|
||||
return ELFLOADER_OK;
|
||||
}
|
||||
|
||||
if(elfloader_loaded_process != NULL) {
|
||||
PRINTF("elfloader: launch program\n");
|
||||
process_start(elfloader_loaded_process, NULL);
|
||||
elfloader_fini = NULL;
|
||||
return ELFLOADER_OK;
|
||||
} else {
|
||||
return ELFLOADER_NO_STARTPOINT;
|
||||
}
|
||||
}
|
||||
/*---------------------------------------------------------------------------*/
|
||||
void
|
||||
elfloader_unload(void)
|
||||
{
|
||||
if(elfloader_fini != NULL) {
|
||||
(*elfloader_fini)();
|
||||
elfloader_fini = NULL;
|
||||
} else if(elfloader_loaded_process != NULL) {
|
||||
process_exit(elfloader_loaded_process);
|
||||
elfloader_loaded_process = NULL;
|
||||
}
|
||||
if(datamemory != NULL) {
|
||||
free(datamemory);
|
||||
datamemory = NULL;
|
||||
}
|
||||
}
|
||||
Loading…
Reference in New Issue
Block a user