--- /dev/null
+/*
+ * (c) copyright 1983 by the Vrije Universiteit, Amsterdam, The Netherlands.
+ *
+ * This product is part of the Amsterdam Compiler Kit.
+ *
+ * Permission to use, sell, duplicate or disclose this software must be
+ * obtained in writing. Requests for such permissions may be sent to
+ *
+ * Dr. Andrew S. Tanenbaum
+ * Wiskundig Seminarium
+ * Vrije Universiteit
+ * Postbox 7161
+ * 1007 MC Amsterdam
+ * The Netherlands
+ *
+ */
+
+/*
+ * This program converts ack.out format to PC/IX a.out format.
+ * It uses ~em/modules/lib/libobject.a.
+ */
+
+#include <stdio.h>
+
+struct exec {
+ unsigned char a_magic[2];
+ unsigned char a_flags;
+ unsigned char a_cpu;
+ unsigned char a_hdrlen;
+ unsigned 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;
+ unsigned char n_sclass;
+ unsigned char n_numaux;
+ unsigned short n_type;
+};
+
+#include <out.h>
+
+#ifndef NORCSID
+static char rcs_id[] = "$Header$" ;
+#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;
+int output;
+
+char *program ;
+
+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
+
+main(argc, argv)
+ int argc;
+ char *argv[];
+{
+ register int nsect;
+ long magic ;
+ long textsize ;
+ long datasize ;
+ long bsssize;
+ long symstart;
+ register struct exec *e = &exec;
+
+ output = 1;
+ 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 = creat(argv[2], 0644)) < 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);
+ while (outsect[TEXTSG].os_size % outsect[TEXTSG].os_lign)
+ outsect[TEXTSG].os_size++;
+ while (outsect[ROMSG].os_size % outsect[ROMSG].os_lign)
+ outsect[ROMSG].os_size++;
+ while (outsect[DATASG].os_size % outsect[DATASG].os_lign)
+ outsect[DATASG].os_size++;
+ /* 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 ( outsect[BSSSG].os_base != outsect[DATASG].os_base+
+ outsect[DATASG].os_size )
+ fatal("bss segment must follow data segment\n") ;
+
+ e->a_magic[0] = 01;
+ e->a_magic[1] = 03;
+ e->a_cpu = 04;
+ e->a_hdrlen = 32;
+ e->a_text = outsect[TEXTSG].os_size;
+ e->a_data = outsect[ROMSG].os_size + outsect[DATASG].os_size;
+ 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;
+ if ( outsect[DATASG].os_base != outsect[ROMSG].os_base+
+ outsect[ROMSG].os_size )
+ fatal("data segment must follow rom\n") ;
+ } else {
+ e->a_flags = 0x10;
+ if ( outsect[ROMSG].os_base != outsect[TEXTSG].os_base+
+ outsect[TEXTSG].os_size )
+ fatal("rom segment must follow text\n") ;
+ if ( outsect[DATASG].os_base != outsect[ROMSG].os_base+
+ outsect[ROMSG].os_size )
+ fatal("data segment must follow rom\n") ;
+ }
+ if ( outhead.oh_nsect==NSECT ) {
+ if ( outsect[LSECT].os_base != outsect[BSSSG].os_base+
+ outsect[BSSSG].os_size )
+ fatal("end segment must follow bss\n") ;
+ if ( outsect[LSECT].os_size != 0 )
+ fatal("end segment must be empty\n") ;
+ }
+
+ /* Action at last */
+ write(output, (char *) e, 32);
+ emits(&outsect[TEXTSG]) ;
+ emits(&outsect[ROMSG]) ;
+ emits(&outsect[DATASG]) ;
+ emit_symtab();
+ if ( outputfile_created ) chmod(argv[2],0755);
+ return 0;
+}
+
+/*
+ * 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);
+ write(output, buffer, blk);
+ 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;
+ write(output, buffer, blk);
+ 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;
+
+ char x;
+ long y;
+ extern char *malloc();
+ char *chars;
+ long l;
+ long off = OFF_CHAR(outhead);
+ int j;
+ char *p;
+
+ chars = malloc(outhead.oh_nchar);
+ 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;
+ }
+ write(output, (char *) &IX_name, sizeof(struct nlist));
+ }
+}
+
+/* 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