cle.h

00001 /*
00002  * Copyright (c) 2006, Swedish Institute of Computer Science
00003  * All rights reserved. 
00004  *
00005  * Redistribution and use in source and binary forms, with or without 
00006  * modification, are permitted provided that the following conditions 
00007  * are met: 
00008  * 1. Redistributions of source code must retain the above copyright 
00009  *    notice, this list of conditions and the following disclaimer. 
00010  * 2. Redistributions in binary form must reproduce the above copyright 
00011  *    notice, this list of conditions and the following disclaimer in the 
00012  *    documentation and/or other materials provided with the distribution. 
00013  * 3. Neither the name of the Institute nor the names of its contributors 
00014  *    may be used to endorse or promote products derived from this software 
00015  *    without specific prior written permission. 
00016  *
00017  * THIS SOFTWARE IS PROVIDED BY THE INSTITUTE AND CONTRIBUTORS ``AS IS'' AND 
00018  * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE 
00019  * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE 
00020  * ARE DISCLAIMED.  IN NO EVENT SHALL THE INSTITUTE OR CONTRIBUTORS BE LIABLE 
00021  * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL 
00022  * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS 
00023  * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) 
00024  * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT 
00025  * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY 
00026  * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF 
00027  * SUCH DAMAGE. 
00028  *
00029  * @(#)$Id: cle.h,v 1.7 2007/06/04 17:47:56 bg- Exp $
00030  */
00031 
00032 #ifndef CLE_H
00033 #define CLE_H
00034 
00035 /*
00036  * The Contiki dynamic Link Editor (CLE) for small systems.
00037  */
00038 
00039 /* These typedefs limits object file size! */
00040 typedef u16_t cle_off;          /* Offset from start of file. */
00041 typedef u16_t cle_word;
00042 typedef u16_t cle_half;
00043 
00044 /* Also used for address arithmetic (can't be void *). */
00045 #ifdef __AVR__
00046 typedef  uint32_t cle_addr;
00047 #else
00048 typedef uintptr_t cle_addr;
00049 #endif
00050 
00051 typedef char cle_scratch[32];
00052 
00053 struct cle_info {
00054   cle_addr text;
00055   void *data, *bss;
00056 
00057   cle_off textrelaoff, datarelaoff;
00058   cle_word textrelasize, datarelasize;
00059 
00060   cle_off textoff, dataoff;
00061   cle_word textsize, datasize, bsssize;
00062 
00063   cle_off symtaboff, strtaboff;
00064   cle_word symtabsize;
00065 
00066   unsigned char text_shndx;
00067   unsigned char data_shndx;
00068   unsigned char bss_shndx;
00069   unsigned char unused_shndx;
00070 
00071   cle_scratch name;             /* Scratch and errmsg buffer. */
00072 };
00073 
00074 int
00075 cle_read_info(struct cle_info *info,
00076               int (*read)(void *, int, off_t),
00077               off_t hdr);       /* Offset to start of file. */
00078 
00079 int
00080 cle_relocate(struct cle_info *info,
00081              int (*read)(void *, int, off_t),
00082              off_t hdr,         /* Offset to start of file. */
00083              void *segmem,      /* Where segment is stored in memory. */
00084              cle_off reloff,    /* .rela.<segment> start */
00085              cle_word relsize); /* .rela.<segment> size */
00086 
00087 void *
00088 cle_lookup(struct cle_info *info,
00089            int (*read)(void *, int, off_t),
00090            off_t hdr,           /* Offset to start of file. */
00091            const char *symbol);
00092 
00093 struct elf32_rela;              /* Struct forward decl. */
00094 
00095 int cle_write_reloc(void *,
00096                     const struct elf32_rela *,
00097                     cle_addr,
00098                     const struct cle_info *);
00099 
00100 /*
00101  * Error codes that apply in general to linking and loading.
00102  */
00103 #define CLE_OK                  0
00104 #define CLE_BAD_HEADER          1
00105 #define CLE_NO_SYMTAB           2
00106 #define CLE_NO_STRTAB           3
00107 #define CLE_NO_TEXT             4
00108 #define CLE_UNDEFINED           5
00109 #define CLE_UNKNOWN_SEGMENT     6
00110 #define CLE_NO_STARTPOINT       7
00111 #define CLE_TEXT_TO_LARGE       8
00112 #define CLE_DATA_TO_LARGE       9
00113 #define CLE_UNKNOWN_RELOC      10
00114 #define CLE_MULTIPLY_DEFINED   11
00115 
00116 #endif /* CLE_H */

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