323 lines
7 KiB
C
323 lines
7 KiB
C
/*
|
|
* (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], "wb")) == 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");
|
|
}
|