316 lines
7 KiB
C
316 lines
7 KiB
C
/*
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* (c) copyright 1983 by the Vrije Universiteit, Amsterdam, The Netherlands.
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*
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* This product is part of the Amsterdam Compiler Kit.
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*
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* Permission to use, sell, duplicate or disclose this software must be
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* obtained in writing. Requests for such permissions may be sent to
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*
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* Dr. Andrew S. Tanenbaum
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* Wiskundig Seminarium
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* Vrije Universiteit
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* Postbox 7161
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* 1007 MC Amsterdam
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* The Netherlands
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*
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*/
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#include <stdio.h>
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#include <out.h>
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#define FMAGIC 0407
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#define NMAGIC 0410
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struct bhdr {
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long fmagic;
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long tsize;
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long dsize;
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long bsize;
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long ssize;
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long rtsize;
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long rdsize;
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long entry;
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};
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struct sym {
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char stype;
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char sympad;
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long svalue;
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};
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#define N_UNDF 0
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#define N_ABS 01
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#define N_TEXT 02
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#define N_DATA 03
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#define N_BSS 04
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#define N_EXT 040
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#define ASSERT(x) switch (2) { case 0: case (x): ; }
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/*
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* Header and section table of new format object file.
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*/
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struct outhead outhead;
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struct outsect outsect[S_MAX];
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char *output_file;
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int outputfile_created;
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int rom_in_data;
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char *program ;
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char flag ;
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#define writef(a, b, c) fwrite((a), (b), (int)(c), output)
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/* Output file definitions and such */
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struct bhdr bh;
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#define ENTRY 0x80000
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#define TOT_HDRSIZE (sizeof(struct bhdr))
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#define TEXTSG 0
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#define ROMSG 1
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#define DATASG 2
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#define BSSSG 3
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#define LSECT BSSSG+1
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#define NSECT LSECT+1
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FILE *output;
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main(argc, argv)
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int argc;
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char *argv[];
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{
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register int nsect;
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long magic ;
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long textsize ;
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long datasize ;
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long bsssize;
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long symstart;
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extern long ftell();
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output = stdout;
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program= argv[0] ;
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if ( argc>1 && argv[1][0]=='-' ) {
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flag=argv[1][1] ;
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argc-- ; argv++ ;
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}
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switch (argc) {
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case 3: if ((output = fopen(argv[2], "w")) == (FILE *)0)
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fatal("Can't write %s.\n", argv[2]);
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output_file = argv[2];
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outputfile_created = 1;
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if (! rd_open(argv[1]))
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fatal("Can't read %s.\n", argv[1]);
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break;
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default:fatal("Usage: %s <ACK object> <Mantra object>.\n", argv[0]);
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}
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rd_ohead(&outhead);
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if (BADMAGIC(outhead))
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fatal("Not an ack object file.\n");
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if (outhead.oh_flags & HF_LINK)
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fatal("Contains unresolved references.\n");
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if (outhead.oh_nrelo > 0)
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fprintf(stderr, "Warning: relocation information present.\n");
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if ( outhead.oh_nsect!=LSECT && outhead.oh_nsect!=NSECT )
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fatal("Input file must have %d sections, not %ld\n",
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NSECT,outhead.oh_nsect) ;
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rd_sect(outsect, outhead.oh_nsect);
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/* A few checks */
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if ( outsect[TEXTSG].os_base != ENTRY)
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fatal("text must start at %d not at 0x%lx\n", ENTRY,
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outsect[TEXTSG].os_base) ;
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if ( outsect[BSSSG].os_flen != 0 )
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fatal("bss space contains initialized data\n") ;
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if ( outsect[BSSSG].os_base != outsect[DATASG].os_base+
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outsect[DATASG].os_size )
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fatal("bss segment must follow data segment\n") ;
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if ( outsect[ROMSG].os_lign == 0x8000 ) {
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/* 410 file with ROMSG in data space */
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rom_in_data = 1;
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magic= NMAGIC ;
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textsize= outsect[TEXTSG].os_size ;
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datasize= outsect[ROMSG].os_size + outsect[DATASG].os_size ;
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if ( outsect[DATASG].os_base != outsect[ROMSG].os_base+
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outsect[ROMSG].os_size )
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fatal("data segment must follow rom\n") ;
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} else
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if ( outsect[DATASG].os_lign == 0x8000 ) {
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/* 410 file with ROMSG in instruction space */
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rom_in_data = 0;
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magic= NMAGIC ;
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textsize= outsect[TEXTSG].os_size + outsect[ROMSG].os_size ;
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datasize= outsect[DATASG].os_size ;
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if ( outsect[ROMSG].os_base != outsect[TEXTSG].os_base+
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outsect[TEXTSG].os_size )
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fatal("rom segment must follow text\n") ;
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} else {
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/* Plain 407 file */
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rom_in_data = 1;
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magic= FMAGIC ;
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textsize= outsect[TEXTSG].os_size ;
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datasize= outsect[ROMSG].os_size + outsect[DATASG].os_size ;
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if ( outsect[ROMSG].os_base != outsect[TEXTSG].os_base+
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outsect[TEXTSG].os_size )
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fatal("rom segment must follow text\n") ;
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if ( outsect[DATASG].os_base != outsect[ROMSG].os_base+
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outsect[ROMSG].os_size )
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fatal("data segment must follow rom\n") ;
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}
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bsssize = outsect[BSSSG].os_size;
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if ( outhead.oh_nsect==NSECT ) {
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if ( outsect[LSECT].os_base != outsect[BSSSG].os_base+
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outsect[BSSSG].os_size )
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fatal("end segment must follow bss\n") ;
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if ( outsect[LSECT].os_size != 0 )
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fatal("end segment must be empty\n") ;
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}
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bh.fmagic = magic;
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bh.tsize = textsize;
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bh.bsize = bsssize;
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bh.dsize = datasize;
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bh.entry = ENTRY;
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/* Action at last */
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fseek(output,(long) TOT_HDRSIZE,0);
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emits(&outsect[TEXTSG]) ;
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emits(&outsect[ROMSG]) ;
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emits(&outsect[DATASG]) ;
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symstart = ftell(output);
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emit_symtab();
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bh.ssize = ftell(output) - symstart;
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fseek(output,0L,0);
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write_header(&bh);
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if ( ferror(output) ) {
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fatal("output write error\n") ;
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}
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if ( outputfile_created ) chmod(argv[2],0755);
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return 0;
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}
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/*
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* Transfer the emitted byted from one file to another.
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*/
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emits(section) struct outsect *section ; {
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char *p;
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char *calloc();
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rd_outsect(section - outsect);
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if (!(p = calloc(section->os_size, 1))) {
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fatal("No memory.\n");
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}
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rd_emit(p, section->os_flen);
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writef(p, 1, section->os_size);
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free(p);
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}
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emit_symtab()
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{
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struct outname *ACK_names;
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register unsigned short i;
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register struct outname *A;
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register char x;
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register char *p;
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extern char *malloc(), *calloc();
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long l;
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long off = OFF_CHAR(outhead);
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char *chars;
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if ((unsigned) outhead.oh_nchar != outhead.oh_nchar ||
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!( chars = malloc((unsigned) outhead.oh_nchar))) {
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fatal("No memory\n.");
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}
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rd_string(chars,outhead.oh_nchar);
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if ((unsigned) outhead.oh_nname != outhead.oh_nname ||
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!(A = (struct outname *)
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calloc(outhead.oh_nname, sizeof(struct outname)))) {
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fatal("No memory.\n");
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}
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ACK_names = A;
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rd_name(ACK_names, outhead.oh_nname);
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for (i = 0; i < outhead.oh_nname; i++, A++) {
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if ((A->on_type & S_TYP) >= S_MIN + LSECT ||
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A->on_foff == 0) continue;
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switch(A->on_type & S_TYP) {
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case S_UND:
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x = N_UNDF;
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break;
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case S_ABS:
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x = N_ABS;
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break;
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case S_MIN + TEXTSG:
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x = N_TEXT;
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break;
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case S_MIN + ROMSG:
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x = (rom_in_data ? N_DATA : N_TEXT);
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break;
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case S_MIN + DATASG:
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x = N_DATA;
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break;
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case S_MIN + BSSSG:
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x = N_BSS;
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break;
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default:
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fprintf(stderr,"warning: unknown s_type: %d\n",
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A->on_type & S_TYP);
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}
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if (A->on_type & S_EXT) x |= N_EXT;
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putc(x,output);
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putc(0,output);
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write_long(A->on_valu);
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l = A->on_foff - off;
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if (l < 0 || l >= outhead.oh_nchar) {
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fatal("bad on_off: %ld\n",l);
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}
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p = &chars[l];
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while (x = *p++) {
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putc(x,output);
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}
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putc('\0',output);
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}
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}
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write_long(l)
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register long l;
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{
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/* write long "l" in 68000 order
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*/
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putc((int) (l >> 24), output);
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putc((int) (l >> 16), output);
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putc((int) (l >> 8), output);
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putc((int) l, output);
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}
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write_header(h)
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register struct bhdr *h;
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{
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write_long(h->fmagic);
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write_long(h->tsize);
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write_long(h->dsize);
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write_long(h->bsize);
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write_long(h->ssize);
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write_long(h->rtsize);
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write_long(h->rdsize);
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write_long(h->entry);
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}
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/* VARARGS1 */
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fatal(s, a1, a2)
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char *s;
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{
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fprintf(stderr,"%s: ",program) ;
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fprintf(stderr, s, a1, a2);
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if (outputfile_created)
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unlink(output_file);
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exit(-1);
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}
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rd_fatal() { fatal("read error.\n"); }
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