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- /*
- * (c) copyright 1987 by the Vrije Universiteit, Amsterdam, The Netherlands.
- * See the copyright notice in the ACK home directory, in the file "Copyright".
- *
- */
- /*
- * This program converts ack.out format to PC/IX a.out format.
- * It uses ~em/modules/lib/libobject.a.
- */
- #include <stdio.h>
- /* unsigned char: not portable */
- struct exec {
- char a_magic[2];
- char a_flags;
- char a_cpu;
- char a_hdrlen;
- char a_unused;
- unsigned short a_version;
- long a_text;
- long a_data;
- long a_bss;
- long a_entry;
- long a_misc;
- long a_syms;
- };
- struct nlist
- { char n_name[8];
- long n_value;
- char n_sclass;
- char n_numaux;
- unsigned short n_type;
- };
- #include <out.h>
- #ifndef NORCSID
- static char rcs_id[] = "$Id$" ;
- #endif
- #define ENTRY 0x0 /* entry point */
- /*
- * Header and section table of new format object file.
- */
- struct outhead outhead;
- struct outsect outsect[S_MAX];
- struct exec exec;
- char *output_file;
- int outputfile_created;
- FILE *output;
- char *program ;
- char *chars;
- char *malloc();
- char flag ;
- /* Output file definitions and such */
- #define TEXTSG 0
- #define ROMSG 1
- #define DATASG 2
- #define BSSSG 3
- #define LSECT BSSSG+1
- #define NSECT LSECT+1
- long align(a,b)
- long a,b;
- {
- a += b - 1;
- return a - a % b;
- }
- int
- follows(pa, pb)
- register struct outsect *pa, *pb;
- {
- /* return 1 if pa follows pb */
- return pa->os_base == align(pb->os_base+pb->os_size, pa->os_lign);
- }
- main(argc, argv)
- int argc;
- char *argv[];
- {
- register struct exec *e = &exec;
- output = stdout;
- program= argv[0] ;
- if ( argc>1 && argv[1][0]=='-' ) {
- flag=argv[1][1] ;
- argc-- ; argv++ ;
- }
- switch (argc) {
- case 1: rd_fdopen(0);
- break;
- case 3: if ((output = fopen(argv[2], "w")) == 0) {
- fatal("Can't write %s.\n", argv[2]);
- }
- output_file = argv[2];
- outputfile_created = 1;
- /* FALLTHROUGH */
- case 2:
- if (! rd_open(argv[1]))
- fatal("Can't read %s.\n", argv[1]);
- break;
- default:fatal("Usage: %s <as object> <dl object>.\n", argv[0]);
- }
- rd_ohead(&outhead);
- if (BADMAGIC(outhead))
- fatal("Not an ack object file.\n");
- if (outhead.oh_flags & HF_LINK)
- fatal("Contains unresolved references.\n");
- if (outhead.oh_nrelo > 0)
- fprintf(stderr, "Warning: relocation information present.\n");
- if ( outhead.oh_nsect!=LSECT && outhead.oh_nsect!=NSECT )
- fatal("Input file must have %d sections, not %ld\n",
- NSECT,outhead.oh_nsect) ;
- rd_sect(outsect, outhead.oh_nsect);
- /* A few checks */
- if ( outsect[TEXTSG].os_base != ENTRY)
- fatal("text must start at %d not at 0x%lx\n", ENTRY,
- outsect[TEXTSG].os_base) ;
- if ( outsect[BSSSG].os_flen != 0 )
- fatal("bss space contains initialized data\n") ;
- if (! follows(&outsect[BSSSG], &outsect[DATASG]))
- fatal("bss segment must follow data segment\n") ;
- if (! follows(&outsect[DATASG], &outsect[ROMSG]))
- fatal("data segment must follow rom\n") ;
- outsect[ROMSG].os_size = outsect[DATASG].os_base - outsect[ROMSG].os_base;
- outsect[DATASG].os_size = outsect[BSSSG].os_base - outsect[DATASG].os_base;
- e->a_magic[0] = 01;
- e->a_magic[1] = 03;
- e->a_cpu = 04;
- e->a_hdrlen = 32;
- e->a_data = outsect[BSSSG].os_base - outsect[ROMSG].os_base;
- e->a_bss = outsect[BSSSG].os_size;
- e->a_entry = outsect[TEXTSG].os_base;
- e->a_syms = (long) outhead.oh_nname * sizeof (struct nlist);
- e->a_misc = 0x10000;
- if ( outsect[ROMSG].os_base == 0x0 ) {
- /* Separate I/D */
- e->a_flags = 0x20;
- outsect[TEXTSG].os_size = e->a_text =
- align(outsect[TEXTSG].os_size,16L);
- } else {
- e->a_flags = 0x10;
- outsect[TEXTSG].os_size = e->a_text =
- outsect[ROMSG].os_base - outsect[TEXTSG].os_base;
- if (! follows(&outsect[ROMSG], &outsect[TEXTSG]))
- fatal("rom segment must follow text\n") ;
- }
- if ( outhead.oh_nsect==NSECT ) {
- if (! follows(&outsect[LSECT], &outsect[BSSSG]))
- fatal("end segment must follow bss\n") ;
- if ( outsect[LSECT].os_size != 0 )
- fatal("end segment must be empty\n") ;
- }
- if (((unsigned) outhead.oh_nchar != outhead.oh_nchar) ||
- (outhead.oh_nchar != 0 &&
- (chars = malloc((unsigned)outhead.oh_nchar)) == 0)) {
- fprintf(stderr, "%s: (warning) No name list generated\n", program);
- e->a_syms = 0;
- }
- /* Action at last */
- fwrite((char *) e, 1, 6, output);
- wr_int2((int) e->a_version);
- wr_long(e->a_text);
- wr_long(e->a_data);
- wr_long(e->a_bss);
- wr_long(e->a_entry);
- wr_long(e->a_misc);
- wr_long(e->a_syms);
- emits(&outsect[TEXTSG]) ;
- emits(&outsect[ROMSG]) ;
- emits(&outsect[DATASG]) ;
- if (e->a_syms) emit_symtab();
- fclose(output);
- if ( outputfile_created ) chmod(argv[2],0755);
- exit(0);
- }
- wr_int2(n)
- int n;
- {
- char buf[2];
- buf[0] = n;
- buf[1] = (n >> 8);
- fwrite(buf, 1, 2, output);
- }
- wr_long(l)
- long l;
- {
- char buf[4];
- buf[0] = l;
- buf[1] = (l >> 8);
- buf[2] = (l >> 16);
- buf[3] = (l >> 24);
- fwrite(buf, 1, 4, output);
- }
- /*
- * Transfer the emitted byted from one file to another.
- */
- emits(section) struct outsect *section ; {
- register long n ;
- register int blk;
- char buffer[BUFSIZ];
- n= section->os_flen ;
- rd_outsect(section - outsect);
- while (n > 0) {
- blk = n > BUFSIZ ? BUFSIZ : n;
- rd_emit(buffer, (long) blk);
- fwrite(buffer, 1, blk, output);
- n -= blk;
- }
- if ((n = section->os_size - section->os_flen) > 0) {
- for (blk = BUFSIZ - 1; blk >= 0; blk--) {
- buffer[blk] = 0;
- }
- while (n > 0) {
- blk = n > BUFSIZ ? BUFSIZ : n;
- fwrite(buffer, 1, blk, output);
- n -= blk;
- }
- }
- }
- emit_symtab()
- {
- struct outname ACK_name; /* symbol table entry in ACK format */
- struct nlist IX_name; /* symbol table entry in PC/IX format */
- register unsigned short i;
- long l;
- long off = OFF_CHAR(outhead);
- int j;
- char *p;
- rd_string(chars,outhead.oh_nchar);
- for (i = 0; i < outhead.oh_nname; i++) {
- rd_name(&ACK_name, 1);
- switch(ACK_name.on_type & S_TYP) {
- case S_UND:
- IX_name.n_sclass = 0;
- break;
- case S_ABS:
- IX_name.n_sclass = 01;
- break;
- case S_MIN + TEXTSG:
- IX_name.n_sclass = 02;
- break;
- case S_MIN + ROMSG:
- case S_MIN + DATASG:
- IX_name.n_sclass = 03;
- break;
- case S_MIN + BSSSG:
- case S_MIN + LSECT:
- IX_name.n_sclass = 04;
- break;
- default:
- fprintf(stderr,"warning: unknown s_type: %d\n",
- ACK_name.on_type & S_TYP);
- }
- if (ACK_name.on_type & S_EXT) IX_name.n_sclass |= 020;
- IX_name.n_value = ACK_name.on_valu;
- if (ACK_name.on_foff == 0) {
- p = "\0\0";
- }
- else {
- l = ACK_name.on_foff - off;
- if (l < 0 || l >= outhead.oh_nchar) {
- fatal("bad on_off: %ld\n",l);
- }
- p = &chars[l];
- }
- for (j = 0; j < 8; j++) {
- IX_name.n_name[j] = *p++;
- if (*p == '\0') break;
- }
- for (j++; j < 8; j++) {
- IX_name.n_name[j] = 0;
- }
- fwrite((char *) &IX_name, 1, 8, output);
- wr_long(IX_name.n_value);
- fwrite(&(IX_name.n_sclass), 1, 2, output);
- wr_int2((int) IX_name.n_type);
- }
- }
- /* VARARGS1 */
- fatal(s, a1, a2)
- char *s;
- {
- fprintf(stderr,"%s: ",program) ;
- fprintf(stderr, s, a1, a2);
- if (outputfile_created) {
- fclose(output);
- unlink(output_file);
- }
- exit(1);
- }
- rd_fatal()
- {
- fatal("read error\n");
- }
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