--- /dev/null
+/* $Header$ */
+/*
+ * (c) copyright 1987 by the Vrije Universiteit, Amsterdam, The Netherlands.
+ * See the copyright notice in the ACK home directory, in the file "Copyright".
+ *
+ */
+
+/*
+ * Convert ACK a.out file to VAX Berkeley Unix object format.
+ */
+
+#include <stdio.h>
+#include <out.h>
+#include <assert.h>
+
+long lseek();
+
+#define OMAGIC 0407 /* old-fashioned */
+#define NMAGIC 0410 /* text write protexted */
+#define ZMAGIC 0413 /* demand paging */
+
+struct bhdr {
+ long magic;
+ long tsize;
+ long dsize;
+ long bsize;
+ long ssize;
+ long entry;
+ long rtsize;
+ long rdsize;
+};
+
+struct machrelo {
+ long address;
+ long relodata;
+};
+#define setpcrel(X,f) (X |= (f<<7))
+#define setsymbolnum(X,n) (X = (X & 0377) | ((long)n << 8))
+#define setextern(X,f) (X |= (f << 4))
+#define setlength(X,l) (X = (X & ~0x60)|((long) l << 5))
+
+struct sym {
+ long name;
+ char type;
+ char other;
+ short desc;
+ long value;
+};
+
+#define N_UNDF 0
+#define N_ABS 02
+#define N_TEXT 04
+#define N_DATA 06
+#define N_BSS 010
+#define N_EXT 01
+#define N_FN 0x1f
+
+/*
+ * Header and section table of new format object file.
+ */
+struct outhead outhead;
+struct outsect outsect[S_MAX];
+
+char *output_file;
+int outputfile_created;
+long magic;
+
+int rom_in_data;
+
+char *program ;
+
+char flag ;
+
+/* Output file definitions and such */
+
+struct bhdr bh;
+
+#define ENTRY 0x0
+#define TOT_HDRSIZE (sizeof(struct bhdr))
+
+
+
+#define TEXTSG 0
+#define ROMSG 1
+#define DATASG 2
+#define BSSSG 3
+#define LSECT BSSSG+1
+#define NSECT LSECT+1
+
+int output;
+
+int unresolved;
+int nflag;
+long textsize ;
+long datasize ;
+long bsssize;
+
+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 int nsect;
+
+ program= argv[0] ;
+ while ( argc>1 && argv[1][0]=='-' ) {
+ flag=argv[1][1] ;
+ if (flag == 'u') unresolved++;
+ else if (flag == 'n') nflag = 1;
+ argc-- ; argv++ ;
+ }
+ switch (argc) {
+ case 3: if ((output = creat(argv[2], 0644)) < 0 ||
+ (close(output), output = open(argv[2],2)) < 0)
+ fatal("Can't write %s.\n", argv[2]);
+ output_file = argv[2];
+ outputfile_created = 1;
+ if (! rd_open(argv[1]))
+ fatal("Can't read %s.\n", argv[1]);
+ break;
+ default:fatal("Usage: %s [-u] [-n] <ACK object> <Vax object>.\n", program);
+ }
+ rd_ohead(&outhead);
+ if (BADMAGIC(outhead))
+ fatal("Not an ack object file.\n");
+ if (outhead.oh_flags & HF_LINK) {
+ if (! unresolved) {
+ fprintf(stderr,"Warning: contains unresolved references.\n");
+ }
+ unresolved++;
+ }
+ else if (outhead.oh_nrelo > 0 && !unresolved)
+ 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[BSSSG].os_flen != 0 )
+ fatal("bss space contains initialized data\n") ;
+ if ( !unresolved && ! follows(&outsect[BSSSG], &outsect[DATASG]))
+ fatal("bss segment must follow data segment\n") ;
+ if (! follows(&outsect[ROMSG],&outsect[TEXTSG]))
+ fatal("rom segment must follow text\n") ;
+ if (! follows(&outsect[DATASG], &outsect[ROMSG]))
+ fatal("data segment must follow rom\n") ;
+ outsect[TEXTSG].os_size = outsect[ROMSG].os_base - outsect[TEXTSG].os_base;
+ outsect[ROMSG].os_size = outsect[DATASG].os_base - outsect[ROMSG].os_base;
+ outsect[DATASG].os_size = outsect[BSSSG].os_base - outsect[DATASG].os_base;
+ if ( outsect[ROMSG].os_lign == 0x400 ) {
+ /* 410/413 file with ROMSG in data space */
+ rom_in_data = 1;
+ magic= NMAGIC ;
+ textsize= outsect[TEXTSG].os_size;
+ datasize= outsect[ROMSG].os_size + outsect[DATASG].os_size ;
+ } else
+ if ( outsect[DATASG].os_lign == 0x400 ) {
+ /* 410/413 file with ROMSG in instruction space */
+ rom_in_data = 0;
+ magic= NMAGIC ;
+ textsize= outsect[TEXTSG].os_size + outsect[ROMSG].os_size ;
+ datasize= outsect[DATASG].os_size ;
+ } else {
+ /* Plain 407 file */
+ rom_in_data = 0;
+ magic= OMAGIC ;
+ textsize= outsect[TEXTSG].os_size + outsect[ROMSG].os_size ;
+ datasize = outsect[DATASG].os_size;
+ }
+ bsssize = outsect[BSSSG].os_size;
+ if (nflag && magic != NMAGIC) {
+ fatal("illegal alignments.\n");
+ }
+ if (magic == NMAGIC && ! nflag) {
+ if (datasize & 0x3ff) {
+ int diff = 0x400 - (datasize & 0x3ff);
+
+ if (bsssize >= diff) bsssize -= diff;
+ else bsssize = 0;
+ outsect[DATASG].os_size += diff;
+ datasize += diff;
+ }
+ magic = ZMAGIC;
+ }
+ 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 (magic != OMAGIC && unresolved) {
+ fatal("unresolved references with wrong magic number\n");
+ }
+
+ if (outsect[TEXTSG].os_base != ENTRY) {
+ fatal("Illegal entry point.\n");
+ }
+
+ bh.magic = magic;
+ bh.tsize = textsize;
+ bh.bsize = bsssize;
+ bh.dsize = datasize;
+ bh.rtsize = 0;
+ bh.rdsize = 0;
+ bh.entry = ENTRY;
+
+ /* Action at last */
+ if (magic == ZMAGIC) {
+ lseek(output,(long) 0x400, 0);
+ }
+ else lseek(output,(long) TOT_HDRSIZE,0);
+ emits(&outsect[TEXTSG]) ;
+ emits(&outsect[ROMSG]) ;
+ emits(&outsect[DATASG]) ;
+ if (unresolved) emit_relo();
+ emit_symtab();
+ bh.ssize = outhead.oh_nname * sizeof(struct sym);
+ lseek(output,0L,0);
+ cvlong(&(bh.magic));
+ cvlong(&(bh.tsize));
+ cvlong(&(bh.dsize));
+ cvlong(&(bh.bsize));
+ cvlong(&(bh.ssize));
+ cvlong(&(bh.entry));
+ cvlong(&(bh.rtsize));
+ cvlong(&(bh.rdsize));
+ writef(&bh, 1, (long) TOT_HDRSIZE);
+ if ( outputfile_created && !unresolved ) chmod(argv[2],0755);
+ exit(0);
+}
+
+writef(addr,sz,cnt)
+ char *addr;
+ long cnt;
+{
+ cnt *= sz;
+
+ while (cnt) {
+ int i = cnt >= 0x4000 ? 0x4000 : cnt;
+
+ cnt -= i;
+ if (write(output, addr, i) < i) {
+ fatal("write error\n");
+ }
+ addr += i;
+ }
+}
+
+/*
+ * Transfer the emitted byted from one file to another.
+ */
+emits(section) struct outsect *section ; {
+ char *p;
+ char *calloc(), *malloc();
+ long sz = section->os_flen;
+
+ rd_outsect(section - outsect);
+ while (sz) {
+ unsigned int i = (sz >= 0x4000 ? 0x4000 : sz);
+ if (!(p = malloc(i))) {
+ fatal("No memory.\n");
+ }
+ rd_emit(p, i);
+ if (write(output, p, i) < i) {
+ fatal("write error.\n");
+ }
+ free(p);
+ sz -= i;
+ }
+
+ sz = section->os_size - section->os_flen;
+ if (sz) {
+ if (!(p = calloc(0x4000, 1))) {
+ fatal("No memory.\n");
+ }
+ while (sz) {
+ unsigned int i = (sz >= 0x4000 ? 0x4000 : sz);
+ if (write(output, p, i) < i) {
+ fatal("write error.\n");
+ }
+ sz -= i;
+ }
+ free(p);
+ }
+}
+
+struct outname *ACKnames;
+
+emit_relo()
+{
+ struct outrelo *ACKrelo;
+ struct machrelo *MACHtrelo,*MACHdrelo;
+ register struct outrelo *ap;
+ register struct machrelo *mtp, *mdp;
+ unsigned int cnt = outhead.oh_nrelo;
+
+ ACKrelo = (struct outrelo *) calloc(cnt, sizeof(struct outrelo));
+ MACHtrelo = (struct machrelo *) calloc(cnt, sizeof(struct machrelo));
+ MACHdrelo = (struct machrelo *) calloc(cnt, sizeof(struct machrelo));
+ ACKnames = (struct outname *) calloc(outhead.oh_nname, sizeof(struct outname));
+ if (!(ap = ACKrelo) || !(mtp = MACHtrelo) || !(mdp = MACHdrelo) ||
+ !ACKnames) {
+ fatal("No memory.\n");
+ }
+ rd_relo(ACKrelo, cnt);
+ rd_name(ACKnames, outhead.oh_nname);
+ while (cnt-- != 0) {
+ register struct machrelo *mp;
+
+ if (ap->or_sect - S_MIN <= ROMSG) mp = mtp++;
+ else mp = mdp++;
+ setlength(mp->relodata,(ap->or_type&RELSZ) >> 1);
+ setpcrel(mp->relodata,(ap->or_type&RELPC != 0));
+ mp->address = ap->or_addr;
+ if (ap->or_sect == ROMSG+S_MIN) {
+ mp->address += outsect[TEXTSG].os_size;
+ }
+ if (ap->or_nami < outhead.oh_nname) {
+ if (ACKnames[ap->or_nami].on_type & S_EXT) {
+ setsymbolnum(mp->relodata, ap->or_nami);
+ setextern(mp->relodata,1);
+ }
+ else {
+ patch(ap, &ACKnames[ap->or_nami], mp);
+ }
+ }
+ else {
+ setsymbolnum(mp->relodata, N_ABS);
+ }
+ cvlong(&(mp->address));
+ cvlong(&(mp->relodata));
+ ap++;
+ }
+ bh.rtsize = (char *) mtp - (char *) MACHtrelo;
+ bh.rdsize = (char *) mdp - (char *) MACHdrelo;
+ writef(MACHtrelo, 1, bh.rtsize);
+ writef(MACHdrelo, 1, bh.rdsize);
+ free(ACKrelo);
+ free(MACHtrelo);
+ free(MACHdrelo);
+}
+
+long
+get(sz)
+{
+ char buf[10];
+ long l = 0;
+ register char *p = buf + sz;
+
+ read(output,buf,sz);
+ while (sz--) {
+ l = (l << 8) | (*--p & 0377);
+ }
+ return l;
+}
+
+put(l,sz)
+ long l;
+{
+ char buf[10];
+ register char *p = buf;
+
+ *p++ = l;
+ *p++ = l >> 8;
+ *p++ = l >> 16;
+ *p++ = l >> 24;
+ p -= sz;
+ if (write(output, p, sz) < sz) {
+ fatal("write error.\n");
+ }
+}
+
+patch(ap, an, mp)
+ register struct outrelo *ap;
+ register struct outname *an;
+ register struct machrelo *mp;
+{
+ int whichsect = (an->on_type & S_TYP) - S_MIN;
+ long correction = 0;
+ long where = TOT_HDRSIZE+ap->or_addr;
+ long X;
+ long here;
+ int sz;
+
+ if (!(an->on_type & S_SCT)) {
+ fprintf(stderr,"funny on_type %x\n", an->on_type);
+ }
+ switch(whichsect) {
+ case TEXTSG:
+ setsymbolnum(mp->relodata,N_TEXT);
+ return;
+ case DATASG:
+ correction = outsect[ROMSG].os_size + outsect[TEXTSG].os_size;
+ setsymbolnum(mp->relodata,N_DATA);
+ break;
+ case ROMSG:
+ correction = outsect[TEXTSG].os_size;
+ setsymbolnum(mp->relodata,N_TEXT);
+ break;
+ case BSSSG:
+ correction = outsect[ROMSG].os_size + outsect[TEXTSG].os_size+
+ outsect[DATASG].os_size;
+ setsymbolnum(mp->relodata,N_BSS);
+ break;
+ default:
+ assert(0);
+ }
+
+ switch(ap->or_sect - S_MIN) {
+ case DATASG:
+ where += outsect[ROMSG].os_size;
+ case ROMSG:
+ where += outsect[TEXTSG].os_size;
+ case TEXTSG:
+ break;
+ default:
+ assert(0);
+ }
+ here = lseek(output, 0L, 1);
+ lseek(output, where, 0);
+ sz = ap->or_type & RELSZ;
+ X = get(sz) + correction;
+ lseek(output, where, 0);
+ put(X,sz);
+ lseek(output, here, 0);
+}
+
+cvlong(l)
+ long *l;
+{
+ long x = *l;
+ char *p = (char *) l;
+
+ *p++ = x;
+ *p++ = x >> 8;
+ *p++ = x >> 16;
+ *p++ = x >> 24;
+}
+
+int
+is_rest_local(A, i)
+ register int i;
+ register struct outname *A;
+{
+ while (i--) {
+ if (A->on_type & S_EXT) return 0;
+ A++;
+ }
+ return 1;
+}
+
+emit_symtab()
+{
+ register unsigned short i = outhead.oh_nname;
+ register struct outname *A;
+ struct sym *MACHnames;
+ register struct sym *M;
+ extern char *malloc(), *calloc();
+ char *chars;
+ long offX = OFF_CHAR(outhead) - 4;
+
+ if (!(A = ACKnames)) {
+ if (!(A = (struct outname *)
+ calloc(i, sizeof(struct outname)))) {
+ fatal("No memory.\n");
+ }
+ rd_name(A, outhead.oh_nname);
+ }
+ if (!(M = (struct sym *) calloc(i, sizeof(struct sym)))) {
+ fatal("No memory.\n");
+ }
+ MACHnames = M;
+ ACKnames = A;
+ for (; i; i--, A++) {
+ M->value = A->on_valu;
+ if (A->on_type & S_SCT ||
+ (A->on_type & S_ETC) == S_FIL) {
+ static int rest_local;
+ if (! unresolved || rest_local || (rest_local = is_rest_local(A, i))) {
+ outhead.oh_nname--;
+ continue;
+ }
+ }
+ if (A->on_type & S_COM) {
+ M->type = N_UNDF | N_EXT;
+ }
+ else switch(A->on_type & S_TYP) {
+ case S_UND:
+ switch(A->on_type & S_ETC) {
+ default:
+ M->type = N_UNDF;
+ break;
+ case S_MOD:
+ M->type = N_FN;
+ break;
+ case S_LIN:
+ M->type = N_ABS;
+ break;
+ }
+ break;
+ case S_ABS:
+ M->type = N_ABS;
+ break;
+ case S_MIN + TEXTSG:
+ M->type = N_TEXT;
+ break;
+ case S_MIN + ROMSG:
+ if (unresolved) {
+ M->value += outsect[TEXTSG].os_size;
+ }
+ M->type = (rom_in_data ? N_DATA : N_TEXT);
+ break;
+ case S_MIN + DATASG:
+ if (unresolved) {
+ M->value += outsect[TEXTSG].os_size +
+ outsect[ROMSG].os_size;
+ }
+ M->type = N_DATA;
+ break;
+ case S_MIN + BSSSG:
+ if (unresolved) {
+ M->value += outsect[TEXTSG].os_size +
+ outsect[ROMSG].os_size +
+ outsect[DATASG].os_size;
+ }
+ M->type = N_BSS;
+ break;
+ case S_MIN + LSECT:
+ M->type = N_BSS;
+ break;
+ default:
+ fprintf(stderr,"warning: unknown s_type: %d\n",
+ A->on_type & S_TYP);
+ }
+ if (A->on_type & S_EXT) M->type |= N_EXT;
+ M->name = A->on_foff;
+ M++;
+ }
+ M = MACHnames;
+ for (i = outhead.oh_nname; i; i--, M++) {
+ if (M->name) {
+ M->name -= offX;
+ }
+ else M->name = outhead.oh_nchar + 3; /* pointer to nullbyte */
+ cvlong(&(M->name));
+ cvlong(&(M->value));
+ }
+ writef(MACHnames, sizeof(struct sym), (long) outhead.oh_nname);
+ free(MACHnames);
+ free(ACKnames);
+ if ((unsigned) outhead.oh_nchar != outhead.oh_nchar ||
+ !( chars = malloc((unsigned) outhead.oh_nchar))) {
+ fatal("No memory\n.");
+ }
+ put(outhead.oh_nchar+4,4);
+ rd_string(chars,outhead.oh_nchar);
+ writef(chars, 1, outhead.oh_nchar);
+ free(chars);
+}
+
+/* VARARGS1 */
+fatal(s, a1, a2)
+ char *s;
+{
+ fprintf(stderr,"%s: ",program) ;
+ fprintf(stderr, s, a1, a2);
+ if (outputfile_created)
+ unlink(output_file);
+ exit(-1);
+}
+
+rd_fatal() { fatal("read error.\n"); }
public / ack.git / commitdiff