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The Micro-Executable Format (MEF) support (experimental).
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matsutsuka
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@ -2,7 +2,7 @@
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# Makefile for z80/SDCC
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# @author Takahide Matsutsuka <markn@markn.org>
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#
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# $Id: Makefile.z80,v 1.9 2007/10/01 23:04:02 matsutsuka Exp $
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# $Id: Makefile.z80,v 1.10 2007/11/28 06:13:24 matsutsuka Exp $
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#
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### Compiler definitions
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@ -29,12 +29,14 @@ AROPTS = -a
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CLEAN += *.lnk *.sym *.lib contiki.ihx
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### CPU-dependent directories
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CONTIKI_CPU_DIRS = . dev lib
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CONTIKI_CPU_DIRS = . dev lib loader
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### CPU-dependent source files
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CONTIKI_SOURCEFILES += strcasecmp.c mtarch.c uip_arch.c \
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libconio_z80.c log-conio.c rs232.c
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CONTIKI_ASMFILES += uip_arch-asm.S crt0.S
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libconio_z80.c log-conio.c rs232.c \
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mef.c
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CONTIKI_ASMFILES += uip_arch-asm.S crt0.S
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#crt-prg.S
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CONTIKI_CASMOBJECTFILES = ${addprefix $(OBJECTDIR)/,$(CONTIKI_CASMFILES:.cS=.o)}
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@ -66,3 +68,13 @@ contiki-$(TARGET).lib: $(CONTIKI_OBJECTFILES) $(PROJECT_OBJECTFILES) $(CONTIKI_A
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contiki.ihx: contiki-$(TARGET).lib $(OBJECTDIR)/crt0.o
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$(CC) $(LDFLAGS) -o $@ $(OBJECTDIR)/crt0.o -lcontiki-$(TARGET).lib
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$(LD) -nf contiki
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LDPFLAGS = -mz80 --out-fmt-ihx --no-std-crt0 --code-loc 0 --data-loc 0
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test.ihx: contiki-$(TARGET).lib $(OBJECTDIR)/crt-prg.o
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$(CC) $(LDPFLAGS) -o $@ $(OBJECTDIR)/crt-prg.o -lcontiki-$(TARGET).lib
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$(LD) -nf test
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%.ihx: contiki-$(TARGET).lib $(OBJECTDIR)/%*.o
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$(CC) $(LDPFLAGS) -o $@ $(OBJECTDIR)/$*.o -lcontiki-$(TARGET).lib
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$(LD) -nf $*
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@ -1,4 +1,13 @@
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;; crt0.S for Contiki
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;;;
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;;;
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;;; ctt0.S
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;;;
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;;; \file
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;;; C runtime startup routine
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;;;
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;;; \author
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;;; Takahide Matsutsuka <markn@markn.org>
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;;;
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.module crt0
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.globl _main
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107
cpu/z80/loader/mef.c
Normal file
107
cpu/z80/loader/mef.c
Normal file
@ -0,0 +1,107 @@
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/*
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* Copyright (c) 2007, Takahide Matsutsuka.
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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
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* copyright notice, this list of conditions and the following
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* disclaimer in the documentation and/or other materials provided
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* with the distribution.
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* 3. The name of the author may not be used to endorse or promote
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* products derived from this software without specific prior
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* written permission.
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*
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* THIS SOFTWARE IS PROVIDED BY THE AUTHOR ``AS IS'' AND ANY EXPRESS
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* OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED
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* WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
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* ARE DISCLAIMED. IN NO EVENT SHALL THE AUTHOR BE LIABLE FOR ANY
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* DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
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* DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE
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* GOODS OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS
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* INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY,
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* WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING
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* NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE OF THIS
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* SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
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*
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* $Id: mef.c,v 1.1 2007/11/28 06:13:24 matsutsuka Exp $
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*
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*/
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/*
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* \file
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* mef.c
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* The Micro Executable Format
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* \author
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* Takahide Matsutsuka <markn@markn.org>
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*/
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#ifdef WITH_LOADER_ARCH
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#include "contiki.h"
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#include "loader/mef.h"
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struct Area areas[MEF_AREA_MAX];
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void
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mef_load(unsigned char* offset)
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{
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unsigned char* start = offset;
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unsigned char areasize = load_byte();
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u16_t relocsize;
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unsigned int i, j;
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u16_t checksum = 0;
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unsigned char* buf;
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struct Relocation reloc;
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for (i = 0; i < areasize; i++) {
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buf = (unsigned char *) &areas[i];
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for (j = 0; j < sizeof(struct Area); j++) {
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*buf++ = load_byte();
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}
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}
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for (i = 0; i < areasize; i++) {
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for (j = 0; j < areas[i].size; j++) {
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*offset = load_byte();
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checksum += *offset;
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offset++;
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}
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if (areas[i].checksum != checksum) {
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// Checksum error!
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}
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}
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// relocation information
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relocsize = load_byte();
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relocsize = (load_byte() << 8) + relocsize;
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for (i = 0; i < relocsize; i++) {
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buf = (unsigned char *) &reloc;
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for (j = 0; j < sizeof(struct Relocation); j++) {
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*buf++ = load_byte();
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}
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mef_reloc(start, &reloc);
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}
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}
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void
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mef_reloc(unsigned char* offset, struct Relocation *reloc)
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{
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if (reloc->mode & MEF_RELOC_ABSOLUTE) {
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return;
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}
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offset += reloc->address;
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if (reloc->mode & MEF_RELOC_MSB_BYTE) {
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*offset = (unsigned char) ((reloc->data + (u16_t) offset) >> 8);
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} else if (reloc->mode & MEF_RELOC_LSB_BYTE) {
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*offset = (unsigned char) ((reloc->data + (u16_t) offset) & 0xff);
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} else { /* word */
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*offset++ = (unsigned char) ((reloc->data + (u16_t) offset) & 0xff);
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*offset = (unsigned char) ((reloc->data + (u16_t) offset) >> 8);
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}
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}
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#endif /* WITH_LOADER_ARCH */
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95
cpu/z80/loader/mef.h
Normal file
95
cpu/z80/loader/mef.h
Normal file
@ -0,0 +1,95 @@
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/*
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* Copyright (c) 2007, Takahide Matsutsuka.
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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
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* copyright notice, this list of conditions and the following
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* disclaimer in the documentation and/or other materials provided
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* with the distribution.
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* 3. The name of the author may not be used to endorse or promote
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* products derived from this software without specific prior
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* written permission.
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*
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* THIS SOFTWARE IS PROVIDED BY THE AUTHOR ``AS IS'' AND ANY EXPRESS
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* OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED
|
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* WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
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* ARE DISCLAIMED. IN NO EVENT SHALL THE AUTHOR BE LIABLE FOR ANY
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* DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
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* DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE
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* GOODS OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS
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* INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY,
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* WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING
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* NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE OF THIS
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* SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
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*
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* $Id: mef.h,v 1.1 2007/11/28 06:13:24 matsutsuka Exp $
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*
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*/
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/*
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* \file
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* mef.h
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* The Micro Executable Format
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* \author
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* Takahide Matsutsuka <markn@markn.org>
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*/
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/*
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* MEF file format:
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* [AreaDecls]
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* BYTE nAreas (0-15)
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* struct AreaSize[nAreas]
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* [Data]
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* binary*
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* [Relocation]
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* WORD nRelocs
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* struct Relocation[nRelocs]
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*/
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#ifndef __MEF_H__
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#define __MEF_H__
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/*
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* mode
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* bit 7: read/write (1) / read only (0)
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* bit 3-0: Area index
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* checksum
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* just a sum of all data of the area
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*/
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#define MEF_AREA_RW 0x80
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#define MEF_AREA_MAX 0x10
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struct Area {
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unsigned char mode;
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u16_t size;
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u16_t checksum;
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};
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/*
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* mode
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* bit 7: Absolute (1) / Relative (0)
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* bit 6: MSB (1) / LSB (0) (in byte mode)
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* bit 5: Byte mode (1) / Word mode (0)
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*/
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#define MEF_RELOC_ABSOLUTE 0x80
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#define MEF_RELOC_MSB_BYTE 0x60
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#define MEF_RELOC_LSB_BYTE 0x20
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struct Relocation {
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unsigned char mode;
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u16_t address;
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u16_t data;
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};
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unsigned char load_byte();
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void mef_load(unsigned char* offset);
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unsigned char load_byte();
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void mef_reloc(unsigned char* offset, struct Relocation* reloc);
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#endif /* __MEF_H__ */
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