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385
mach/m68k2/cv/cv.c
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385
mach/m68k2/cv/cv.c
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/*
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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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#ifndef NORCSID
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static char rcs_id[] = "$Header$" ;
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#endif
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/* BUG:
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There is a problem with Bleasdale 'nm' and the namelist produced
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by this program.
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nm always acts as if there were no name list, while adb
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understands a.out's with namelists without any complaint.
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The cause is unclear. All sizes in the header and file are correct.
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Setting the symbol table size to a size smaller than actually
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present in the a.out causes 'adb' to produce error messages
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about name list problems, but nm suddenly prints the namelist,
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INCLUDING the entrie outside the size indicated in the a.out header.
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*/
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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 *stringarea ;
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char *output_file;
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int output_file_created;
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char *program ;
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char flag ;
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#define readf(a, b, c) fread((a), (b), (int)(c), input)
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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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#define HDR_LENGTH 32
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char hdr[HDR_LENGTH] ;
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#define TEXT 0
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#define ROM 1
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#define DATA 2
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#define BSS 3
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#define LSECT BSS+1
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#define NSECT LSECT+1
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#define N_EXT 040
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#define N_UNDEF 00
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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_FN 037
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FILE *input;
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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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ASSERT(sizeof(struct outhead) == SZ_HEAD);
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ASSERT(sizeof(struct outsect) == SZ_SECT);
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input = stdin; 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 1: break;
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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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output_file_created = 1;
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/* FALLTHROUGH */
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case 2: if ((input = fopen(argv[1], "r")) == (FILE *)0)
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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 <as object> <dl object>.\n", argv[0]);
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}
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if ( !rhead(input,&outhead) )
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fatal("Reading header failed.\n");
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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_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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for ( nsect=0 ; nsect<outhead.oh_nsect ; nsect++ )
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if ( !rsect(input,&outsect[nsect]) )
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fatal("Reading section table failed.\n");
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/* A few checks */
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if ( outsect[TEXT].os_base != 0x20000 )
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fatal("text must start at 0x20000 not at 0x%lx\n",
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outsect[TEXT].os_base) ;
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if ( outsect[BSS].os_flen != 0 )
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fatal("bss space contains initialized data\n") ;
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if ( outsect[BSS].os_base != outsect[DATA].os_base+
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outsect[DATA].os_size )
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fatal("bss segment must follow data segment\n") ;
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if ( outsect[ROM].os_lign == 0x8000 ) {
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/* 410 file with ROM in data space */
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magic= 0410 ;
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textsize= outsect[TEXT].os_size ;
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datasize= outsect[ROM].os_size + outsect[DATA].os_size ;
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if ( outsect[DATA].os_base != outsect[ROM].os_base+
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outsect[ROM].os_size )
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fatal("data segment must follow rom\n") ;
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} else
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if ( outsect[DATA].os_lign == 0x8000 ) {
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/* 410 file with ROM in instruction space */
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magic= 0410 ;
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textsize= outsect[TEXT].os_size + outsect[ROM].os_size ;
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datasize= outsect[DATA].os_size ;
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if ( outsect[ROM].os_base != outsect[TEXT].os_base+
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outsect[TEXT].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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magic= 0407 ;
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textsize= outsect[TEXT].os_size ;
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datasize= outsect[ROM].os_size + outsect[DATA].os_size ;
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if ( outsect[ROM].os_base != outsect[TEXT].os_base+
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outsect[TEXT].os_size )
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fatal("rom segment must follow text\n") ;
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if ( outsect[DATA].os_base != outsect[ROM].os_base+
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outsect[ROM].os_size )
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fatal("data segment must follow rom\n") ;
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}
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if ( outhead.oh_nsect==NSECT ) {
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if ( outsect[LSECT].os_base != outsect[BSS].os_base+
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outsect[BSS].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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/* Action at last */
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fseek(output,(long)sizeof(hdr),0);
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emits(&outsect[TEXT]) ;
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emits(&outsect[ROM]) ;
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emits(&outsect[DATA]) ;
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names() ;
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set4(hdr,0,magic) ;
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set4(hdr,4,textsize) ;
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set4(hdr,8,datasize) ;
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set4(hdr,12,outsect[BSS].os_size) ;
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set4(hdr,28,0x20000L) ; /* Entry point */
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fseek(output,0L,0);
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fwrite(hdr,sizeof(hdr),1,output);
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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 ( output_file_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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* and zero fill the uninitialized space
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*/
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emits(section) struct outsect *section ; {
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register long n ;
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register int blk;
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char buffer[BUFSIZ];
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n= section->os_flen ;
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while (n > 0) {
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blk = n > BUFSIZ ? BUFSIZ : n;
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readf(buffer, 1, blk);
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writef(buffer, 1, blk);
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n -= blk;
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}
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if ( section->os_flen!=section->os_size ) {
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for ( n=BUFSIZ-1 ; n ; n-- ) buffer[n]=0 ;
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n= section->os_size - section->os_flen ;
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while (n > 0) {
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blk = n > BUFSIZ ? BUFSIZ : n;
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writef(buffer, 1, blk);
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n -= blk;
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}
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}
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}
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/*
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* Copy the name table, except the last outhead.oh_nsect.
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* These are assumed to be section names.
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*
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*/
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names()
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{
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register ushort n = outhead.oh_nname - outhead.oh_nsect;
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int type = 0 ;
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struct outname outname ;
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char buffer[100] ;
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char *s1, *s2 ;
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long length, fullength ;
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fseek(input,OFF_CHAR(outhead),0) ;
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chars() ;
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if ( !stringarea ) return ;
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fseek(input,OFF_NAME(outhead),0) ;
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fullength=0 ; buffer[1]=0 ;
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while (n--) {
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rname(input,&outname) ;
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if (outname.on_foff == 0)
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continue ;
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if (outname.on_type & S_ETC ) {
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switch (outname.on_type & S_ETC ) {
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/* ???
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case S_FIL :
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type |= N_FN ;
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*/
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case S_COM :
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break ;
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default :
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continue ;
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}
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}
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set4(buffer,2,outname.on_valu ) ;
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switch (outname.on_type & S_TYP) {
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case S_UND:
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type = N_UNDEF;
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break;
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case S_ABS:
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type = N_ABS;
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break;
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case S_MIN + TEXT:
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type = N_TEXT;
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break;
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case S_MIN + DATA:
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type = N_DATA;
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break;
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case S_MIN + BSS:
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case S_MIN + LSECT:
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type = N_BSS;
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break ;
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}
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if (outname.on_type & S_EXT)
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type |= N_EXT;
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buffer[0]= type ;
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s1=buffer+6 ; s2= stringarea+outname.on_foff-OFF_CHAR(outhead);
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length= 6 ;
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while ( (++length<sizeof buffer) && (*s1++ = *s2++) ) ;
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buffer[sizeof buffer - 1]= 0 ; /* make sure of zero byte */
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writef(buffer, length, 1);
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fullength += length ;
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}
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/*
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* The last outhead.oh_nsect names are discarded.
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*/
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fseek(input, (long)(SZ_NAME * outhead.oh_nsect), 1);
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set4(hdr,16,fullength) ;
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}
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/*
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* Grab the string area preceded by the long that indicates its size.
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*
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*/
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chars()
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{
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register long n = outhead.oh_nchar;
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register int blk;
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char *curr ;
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extern char *malloc() ;
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if ( n==0 ) return ;
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if ( (unsigned)n != n ) fatal("string table too large\n") ;
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stringarea= malloc((unsigned)n) ;
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if ( !stringarea ) fatal("string table too large\n") ;
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curr= stringarea ;
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while (n > 0) {
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blk = n > BUFSIZ ? BUFSIZ : n;
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readf(curr, 1, blk);
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curr += blk ;
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n -= blk;
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}
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}
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rhead(f,head) struct outhead *head ; FILE *f ; {
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char buf[SZ_HEAD] ;
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if ( fread(buf,SZ_HEAD,1,f)!=1 ) return 0 ;
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iconvert(buf,(char *)head,SF_HEAD) ;
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return 1 ;
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}
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rsect(f,sect) struct outsect *sect ; FILE *f ; {
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char buf[SZ_SECT] ;
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if ( fread(buf,SZ_SECT,1,f)!=1 ) return 0 ;
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iconvert(buf,(char *)sect,SF_SECT) ;
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return 1 ;
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}
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rrelo(f,relo) struct outrelo *relo ; FILE *f ; {
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char buf[SZ_RELO] ;
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if ( fread(buf,SZ_RELO,1,f)!=1 ) return 0 ;
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iconvert(buf,(char *)relo,SF_RELO) ;
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return 1 ;
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}
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rname(f,name) struct outname *name ; FILE *f ; {
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char buf[SZ_NAME] ;
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if ( fread(buf,SZ_NAME,1,f)!=1 ) return 0 ;
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iconvert(buf,(char *)name,SF_NAME) ;
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return 1 ;
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}
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iconvert(buf,str,fmt) char *buf, *str, *fmt ; {
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register char *nf, *ni, *no ;
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int last, i ;
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long value ;
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ni=buf ; no=str ; nf=fmt ;
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while ( last = *nf++ ) {
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last -= '0' ;
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if ( last<1 || last >9 ) fatal("illegal out.h format string\n");
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value=0 ;
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i=last ;
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while ( i-- ) {
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value = (value<<8) + (ni[i]&0xFF) ;
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}
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switch ( last ) {
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case 0 : break ;
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case 1 : *no= value ; break ;
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case 2 : *(unsigned short *)no = value ; break ;
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case 4 : *(long *)no = value ; break ;
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default :
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fatal("illegal out.h format string\n");
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}
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ni += last ; no += last ;
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}
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}
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set2(buf,off,val) char *buf ; int val ; {
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buf[off+0] = val>>8 ;
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buf[off+1] = val ;
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}
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set4(buf,off,val) char *buf ; long val ; {
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buf[off] = val>>24 ;
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buf[off+1] = val>>16 ;
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buf[off+2] = val>>8 ;
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buf[off+3] = val ;
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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 (output_file_created)
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unlink(output_file);
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exit(-1);
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}
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