nes-proj/core/loader/cle.h

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/*
* 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.
*
*/
#ifndef CLE_H
#define CLE_H
/*
* The Contiki dynamic Link Editor (CLE) for small systems.
*/
/* These typedefs limits object file size! */
typedef uint16_t cle_off; /* Offset from start of file. */
typedef uint16_t cle_word;
typedef uint16_t cle_half;
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/* Also used for address arithmetic (can't be void *). */
#ifdef __AVR__
typedef uint32_t cle_addr;
#else
typedef uintptr_t cle_addr;
#endif
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typedef char cle_scratch[32];
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struct cle_info {
cle_addr text;
void *data, *bss;
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cle_off textrelaoff, datarelaoff;
cle_word textrelasize, datarelasize;
cle_off textoff, dataoff;
cle_word textsize, datasize, bsssize;
cle_off symtaboff, strtaboff;
cle_word symtabsize;
unsigned char text_shndx;
unsigned char data_shndx;
unsigned char bss_shndx;
unsigned char unused_shndx;
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cle_scratch name; /* Scratch and errmsg buffer. */
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};
int
cle_read_info(struct cle_info *info,
int (*read)(void *, int, off_t),
off_t hdr); /* Offset to start of file. */
int
cle_relocate(struct cle_info *info,
int (*read)(void *, int, off_t),
off_t hdr, /* Offset to start of file. */
void *segmem, /* Where segment is stored in memory. */
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cle_off reloff, /* .rela.<segment> start */
cle_word relsize); /* .rela.<segment> size */
void *
cle_lookup(struct cle_info *info,
int (*read)(void *, int, off_t),
off_t hdr, /* Offset to start of file. */
const char *symbol);
struct elf32_rela; /* Struct forward decl. */
int cle_write_reloc(void *,
const struct elf32_rela *,
cle_addr,
const struct cle_info *);
/*
* Error codes that apply in general to linking and loading.
*/
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#define CLE_OK 0
#define CLE_BAD_HEADER 1
#define CLE_NO_SYMTAB 2
#define CLE_NO_STRTAB 3
#define CLE_NO_TEXT 4
#define CLE_UNDEFINED 5
#define CLE_UNKNOWN_SEGMENT 6
#define CLE_NO_STARTPOINT 7
#define CLE_TEXT_TO_LARGE 8
#define CLE_DATA_TO_LARGE 9
#define CLE_UNKNOWN_RELOC 10
#define CLE_MULTIPLY_DEFINED 11
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#endif /* CLE_H */