562 lines
10 KiB
C
562 lines
10 KiB
C
/* $Header$ */
|
|
/*
|
|
* (c) copyright 1987 by the Vrije Universiteit, Amsterdam, The Netherlands.
|
|
* See the copyright notice in the ACK home directory, in the file "Copyright".
|
|
*/
|
|
/* @(#)comm4.c 1.6 */
|
|
/*
|
|
* Micro processor assembler framework written by
|
|
* Johan Stevenson, Vrije Universiteit, Amsterdam
|
|
* modified by
|
|
* Johan Stevenson, Han Schaminee and Hans de Vries
|
|
* Philips S&I, T&M, PMDS, Eindhoven
|
|
*/
|
|
|
|
#include "comm0.h"
|
|
#include "comm1.h"
|
|
#include "y.tab.h"
|
|
|
|
extern YYSTYPE yylval;
|
|
|
|
/* ========== Machine independent C routines ========== */
|
|
|
|
stop() {
|
|
#if DEBUG < 2
|
|
unlink(temppath);
|
|
#ifdef LISTING
|
|
unlink(listpath);
|
|
#endif
|
|
#endif
|
|
exit(nerrors != 0);
|
|
}
|
|
|
|
main(argc, argv)
|
|
char **argv;
|
|
{
|
|
register char *p;
|
|
register i;
|
|
static char sigs[] = {
|
|
SIGHUP, SIGINT, SIGQUIT, SIGTERM, 0
|
|
};
|
|
|
|
/* the next test should be performed by the
|
|
* preprocessor, but it cannot, so it is performed by the compiler.
|
|
*/
|
|
|
|
switch(0) {
|
|
case 1: break;
|
|
case (S_ETC|S_COM|S_VAR|S_DOT) != S_ETC : break;
|
|
}
|
|
|
|
progname = *argv++; argc--;
|
|
for (p = sigs; i = *p++; )
|
|
if (signal(i, SIG_IGN) != SIG_IGN)
|
|
signal(i, stop);
|
|
for (i = 0; i < argc; i++) {
|
|
p = argv[i];
|
|
if (*p++ != '-')
|
|
continue;
|
|
switch (*p++) {
|
|
case 'o':
|
|
if (*p != NULL) {
|
|
aoutpath = p;
|
|
break;
|
|
}
|
|
argv[i] = 0;
|
|
if (++i >= argc)
|
|
fatal("-o needs filename");
|
|
aoutpath = argv[i];
|
|
break;
|
|
case 'd':
|
|
#ifdef LISTING
|
|
dflag = 0;
|
|
while (*p >= '0' && *p <= '7')
|
|
dflag = (dflag << 3) + *p++ - '0';
|
|
if ((dflag & 0777) == 0)
|
|
dflag |= 0700;
|
|
dflag &= ~4;
|
|
#endif
|
|
break;
|
|
case 's':
|
|
sflag = 0;
|
|
while (*p >= '0' && *p <= '7')
|
|
sflag = (sflag << 3) + *p++ - '0';
|
|
break;
|
|
case 'r':
|
|
#ifdef RELOCATION
|
|
#ifdef ASLD
|
|
rflag = 1;
|
|
#endif ASLD
|
|
#endif RELOCATION
|
|
break;
|
|
case 'b':
|
|
#ifdef THREE_PASS
|
|
bflag = 1;
|
|
#endif
|
|
break;
|
|
#ifndef ASLD
|
|
case 'u':
|
|
case '\0':
|
|
uflag = 1;
|
|
break;
|
|
#endif
|
|
default:
|
|
continue;
|
|
}
|
|
argv[i] = 0;
|
|
}
|
|
#ifdef RELOCATION
|
|
if (rflag)
|
|
sflag |= SYM_SCT;
|
|
#endif RELOCATION
|
|
pass_1(argc, argv);
|
|
#ifdef THREE_PASS
|
|
pass_23(PASS_2);
|
|
#endif
|
|
pass_23(PASS_3);
|
|
oflush();
|
|
wr_close();
|
|
stop();
|
|
}
|
|
|
|
/* ---------- pass 1: arguments, modules, archives ---------- */
|
|
|
|
pass_1(argc, argv)
|
|
char **argv;
|
|
{
|
|
register char *p;
|
|
register item_t *ip;
|
|
#ifdef ASLD
|
|
char armagic[2];
|
|
#else
|
|
register nfile = 0;
|
|
#endif
|
|
|
|
tempfile = fftemp(temppath, "asTXXXXXX");
|
|
#ifdef LISTING
|
|
listmode = dflag;
|
|
if (listmode & 0440)
|
|
listfile = fftemp(listpath, "asLXXXXXX");
|
|
#endif
|
|
for (ip = keytab; ip->i_type; ip++)
|
|
item_insert(ip, H_KEY+hash(ip->i_name));
|
|
machstart(PASS_1);
|
|
while (--argc >= 0) {
|
|
p = *argv++;
|
|
if (p == 0)
|
|
continue;
|
|
#ifndef ASLD
|
|
if (nfile != 0)
|
|
fatal("second source file %s", p);
|
|
nfile++;
|
|
#endif
|
|
if (p[0] == '-' && p[1] == '\0') {
|
|
input = stdin;
|
|
parse("STDIN");
|
|
continue;
|
|
}
|
|
|
|
if ((input = fopen(p, "r")) == NULL)
|
|
fatal("can't open %s", p);
|
|
#ifdef ASLD
|
|
if (
|
|
fread(armagic, 2, 1, input) == 1
|
|
&&
|
|
((armagic[0]&0377) |
|
|
((unsigned)(armagic[1]&0377)<<8)) == ARMAG
|
|
) {
|
|
archive();
|
|
fclose(input);
|
|
continue;
|
|
}
|
|
rewind(input);
|
|
#endif
|
|
parse(p);
|
|
fclose(input);
|
|
}
|
|
commfinish();
|
|
machfinish(PASS_1);
|
|
#ifdef ASLD
|
|
if (unresolved) {
|
|
register int i;
|
|
|
|
nerrors++;
|
|
fflush(stdout);
|
|
fprintf(stderr, "unresolved references:\n");
|
|
for (i = 0; i < H_SIZE; i++) {
|
|
ip = hashtab[H_GLOBAL+i];
|
|
while (ip != 0) {
|
|
if ((ip->i_type & (S_EXT|S_TYP)) == (S_EXT|S_UND))
|
|
fprintf(stderr, "\t%s\n", ip->i_name);
|
|
ip = ip->i_next;
|
|
}
|
|
}
|
|
}
|
|
#else
|
|
if (unresolved)
|
|
outhead.oh_flags |= HF_LINK;
|
|
if (nfile == 0)
|
|
fatal("no source file");
|
|
#endif
|
|
}
|
|
|
|
#ifdef ASLD
|
|
archive() {
|
|
register long offset;
|
|
struct ar_hdr header;
|
|
char getsize[AR_TOTAL];
|
|
|
|
archmode++;
|
|
offset = 2;
|
|
for (;;) {
|
|
if (unresolved == 0)
|
|
break;
|
|
fseek(input,offset,0);
|
|
if (fread(getsize,AR_TOTAL,1,input) != 1)
|
|
break;
|
|
offset += AR_TOTAL;
|
|
strncpy(header.ar_name,getsize,sizeof header.ar_name) ;
|
|
header.ar_size= (((((long) (getsize[AR_SIZE+1]&0377))<<8)+
|
|
((long) (getsize[AR_SIZE ]&0377))<<8)+
|
|
((long) (getsize[AR_SIZE+3]&0377))<<8)+
|
|
((long) (getsize[AR_SIZE+2]&0377)) ;
|
|
archsize = header.ar_size;
|
|
if (needed()) {
|
|
fseek(input,offset,0);
|
|
archsize = header.ar_size;
|
|
header.ar_name[14] = '\0';
|
|
parse(remember(header.ar_name));
|
|
}
|
|
offset += header.ar_size;
|
|
while (offset % 2)
|
|
offset++;
|
|
}
|
|
archmode = 0;
|
|
}
|
|
|
|
needed()
|
|
{
|
|
register c, first;
|
|
register item_t *ip;
|
|
register need;
|
|
|
|
#ifdef LISTING
|
|
register save;
|
|
|
|
save = listflag; listflag = 0;
|
|
#endif
|
|
need = 0;
|
|
peekc = -1;
|
|
first = 1;
|
|
for (;;) {
|
|
c = nextchar();
|
|
if (c == '\n') {
|
|
first = 1;
|
|
continue;
|
|
}
|
|
if (c == ' ' || c == '\t' || c == ',')
|
|
continue;
|
|
if (ISALPHA(c) == 0)
|
|
break;
|
|
if ((ip = item_search(readident(c))) == 0) {
|
|
if (first)
|
|
break;
|
|
continue;
|
|
}
|
|
if (first) {
|
|
if (ip == &keytab[KEYSECT]) {
|
|
while ((c = nextchar()) != '\n')
|
|
;
|
|
continue;
|
|
}
|
|
|
|
if (ip != &keytab[KEYDEFINE])
|
|
break;
|
|
first = 0;
|
|
}
|
|
if ((ip->i_type & S_TYP) == S_UND) {
|
|
need++;
|
|
break;
|
|
}
|
|
}
|
|
#ifdef LISTING
|
|
listflag = save;
|
|
#endif
|
|
return(need);
|
|
}
|
|
#endif ASLD
|
|
|
|
parse(s)
|
|
char *s;
|
|
{
|
|
register i;
|
|
register item_t *ip;
|
|
register char *p;
|
|
|
|
for (p = s; *p; )
|
|
if (*p++ == '/')
|
|
s = p;
|
|
#ifdef ASLD
|
|
yylval.y_strp = s;
|
|
putval(MODULE);
|
|
#endif
|
|
for (i = 0; i < FB_SIZE; i++)
|
|
fb_ptr[FB_BACK+i] = 0;
|
|
newmodule(s);
|
|
peekc = -1;
|
|
yyparse();
|
|
/*
|
|
* Check for undefined symbols
|
|
*/
|
|
#ifdef ASLD
|
|
for (i = 0; i < H_SIZE; i++) {
|
|
while (ip = hashtab[H_LOCAL+i]) {
|
|
/*
|
|
* cleanup local queue
|
|
*/
|
|
hashtab[H_LOCAL+i] = ip->i_next;
|
|
/*
|
|
* make undefined references extern
|
|
*/
|
|
if ((ip->i_type & (S_VAR|S_TYP)) == S_UND)
|
|
ip->i_type |= S_EXT;
|
|
/*
|
|
* relink externals in global queue
|
|
*/
|
|
if (ip->i_type & S_EXT)
|
|
item_insert(ip, H_GLOBAL+i);
|
|
}
|
|
}
|
|
#else
|
|
for (i = 0; i < H_SIZE; i++) {
|
|
for (ip = hashtab[H_LOCAL+i]; ip; ip = ip->i_next) {
|
|
if (ip->i_type & S_EXT)
|
|
continue;
|
|
if (ip->i_type != S_UND)
|
|
continue;
|
|
if (uflag == 0)
|
|
serror("undefined symbol %s", ip->i_name);
|
|
ip->i_type |= S_EXT;
|
|
}
|
|
}
|
|
#endif
|
|
/*
|
|
* Check for undefined numeric labels
|
|
*/
|
|
for (i = 0; i < FB_SIZE; i++) {
|
|
if ((ip = fb_ptr[FB_FORW+i]) == 0)
|
|
continue;
|
|
serror("undefined label %d", i);
|
|
fb_ptr[FB_FORW+i] = 0;
|
|
}
|
|
}
|
|
|
|
pass_23(n)
|
|
{
|
|
register i;
|
|
#ifdef ASLD
|
|
register addr_t base = 0;
|
|
#endif
|
|
register sect_t *sp;
|
|
|
|
if (nerrors)
|
|
stop();
|
|
pass = n;
|
|
#ifdef LISTING
|
|
listmode >>= 3;
|
|
if (listmode & 4)
|
|
ffreopen(listpath, listfile);
|
|
listeoln = 1;
|
|
#endif
|
|
#ifdef THREE_PASS
|
|
nbits = 0;
|
|
#endif
|
|
for (i = 0; i < FB_SIZE; i++)
|
|
fb_ptr[FB_FORW+i] = fb_ptr[FB_HEAD+i];
|
|
outhead.oh_nemit = 0;
|
|
for (sp = sect; sp < §[outhead.oh_nsect]; sp++) {
|
|
#ifdef ASLD
|
|
if (sp->s_flag & BASED) {
|
|
base = sp->s_base;
|
|
if (base % sp->s_lign)
|
|
fatal("base not aligned");
|
|
} else {
|
|
base += (sp->s_lign - 1);
|
|
base -= (base % sp->s_lign);
|
|
sp->s_base = base;
|
|
}
|
|
base += sp->s_size;
|
|
base += sp->s_comm;
|
|
#endif
|
|
outhead.oh_nemit += sp->s_size - sp->s_zero;
|
|
}
|
|
if (pass == PASS_3)
|
|
setupoutput();
|
|
for (sp = sect; sp < §[outhead.oh_nsect]; sp++) {
|
|
sp->s_size = 0;
|
|
sp->s_zero = 0;
|
|
#ifdef THREE_PASS
|
|
sp->s_gain = 0;
|
|
#endif
|
|
}
|
|
machstart(n);
|
|
#ifndef ASLD
|
|
newmodule(modulename);
|
|
#endif ASLD
|
|
ffreopen(temppath, tempfile);
|
|
yyparse();
|
|
commfinish();
|
|
machfinish(n);
|
|
}
|
|
|
|
newmodule(s)
|
|
char *s;
|
|
{
|
|
switchsect(S_UND);
|
|
modulename = s;
|
|
lineno = 1;
|
|
if ((sflag & (SYM_EXT|SYM_LOC|SYM_LAB)) && PASS_SYMB)
|
|
newsymb(s, S_MOD, (short)0, (valu_t)0);
|
|
#ifdef LISTING
|
|
listtemp = 0;
|
|
if (dflag & 01000)
|
|
listtemp = listmode;
|
|
listflag = listtemp;
|
|
#endif
|
|
}
|
|
|
|
setupoutput()
|
|
{
|
|
register sect_t *sp;
|
|
register long off;
|
|
struct outsect outsect;
|
|
register struct outsect *pos = &outsect;
|
|
|
|
if (! wr_open(aoutpath)) {
|
|
fatal("can't create %s", aoutpath);
|
|
}
|
|
wr_ohead(&outhead);
|
|
/*
|
|
* section table generation
|
|
*/
|
|
off = SZ_HEAD;
|
|
off += (long)outhead.oh_nsect * SZ_SECT;
|
|
for (sp = sect; sp < §[outhead.oh_nsect]; sp++) {
|
|
sp->s_foff = off;
|
|
pos->os_base = SETBASE(sp);
|
|
pos->os_size = sp->s_size + sp->s_comm;
|
|
pos->os_foff = sp->s_foff;
|
|
pos->os_flen = sp->s_size - sp->s_zero;
|
|
pos->os_lign = sp->s_lign;
|
|
off += pos->os_flen;
|
|
wr_sect(pos, 1);
|
|
}
|
|
#ifdef RELOCATION
|
|
off += (long)outhead.oh_nrelo * SZ_RELO;
|
|
#endif
|
|
if (sflag == 0)
|
|
return;
|
|
off += (long)outhead.oh_nname * SZ_NAME;
|
|
outhead.oh_nchar = off; /* see newsymb() */
|
|
}
|
|
|
|
commfinish()
|
|
{
|
|
#ifndef ASLD
|
|
register int i;
|
|
#endif
|
|
register struct common_t *cp;
|
|
register item_t *ip;
|
|
register sect_t *sp;
|
|
register valu_t addr;
|
|
|
|
switchsect(S_UND);
|
|
/*
|
|
* assign .comm labels and produce .comm symbol table entries
|
|
*/
|
|
for (cp = commons; cp; cp = cp->c_next) {
|
|
ip = cp->c_it;
|
|
#ifndef ASLD
|
|
if (!( ip->i_type & S_EXT)) {
|
|
#endif
|
|
sp = §[(ip->i_type & S_TYP) - S_MIN];
|
|
if (pass == PASS_1) {
|
|
addr = sp->s_size + sp->s_comm;
|
|
sp->s_comm += ip->i_valu;
|
|
ip->i_valu = addr;
|
|
#ifndef ASLD
|
|
ip->i_type &= ~S_COM;
|
|
#endif
|
|
}
|
|
#ifdef ASLD
|
|
#ifdef THREE_PASS
|
|
if (pass == PASS_2) {
|
|
ip->i_valu -= sp->s_gain;
|
|
}
|
|
#endif
|
|
if ((sflag & SYM_EXT) && PASS_SYMB)
|
|
newsymb(
|
|
ip->i_name,
|
|
ip->i_type & (S_EXT|S_TYP),
|
|
(short)0,
|
|
load(ip)
|
|
);
|
|
#else not ASLD
|
|
#ifdef THREE_PASS
|
|
if (pass == PASS_2) {
|
|
cp->c_size -= sp->s_gain;
|
|
}
|
|
#endif THREE_PASS
|
|
}
|
|
if (pass == PASS_1) cp->c_size = ip->i_valu;
|
|
if (PASS_SYMB) {
|
|
if (pass != PASS_3 && (ip->i_type & S_EXT)) {
|
|
ip->i_valu = outhead.oh_nname;
|
|
}
|
|
newsymb(
|
|
ip->i_name,
|
|
ip->i_type,
|
|
(short) 0,
|
|
cp->c_size
|
|
);
|
|
}
|
|
#endif not ASLD
|
|
}
|
|
if (PASS_SYMB == 0)
|
|
return;
|
|
#ifndef ASLD
|
|
/*
|
|
* produce symbol table entries for undefined's
|
|
*/
|
|
for (i = 0; i<H_SIZE; i++)
|
|
for (ip = hashtab[H_LOCAL+i]; ip; ip = ip->i_next) {
|
|
if (ip->i_type != (S_EXT|S_UND))
|
|
continue;
|
|
if (pass != PASS_3)
|
|
/*
|
|
* save symbol table index
|
|
* for possible relocation
|
|
*/
|
|
ip->i_valu = outhead.oh_nname;
|
|
newsymb(
|
|
ip->i_name,
|
|
S_EXT|S_UND,
|
|
(short)0,
|
|
(valu_t)0
|
|
);
|
|
}
|
|
#endif not ASLD
|
|
/*
|
|
* produce symbol table entries for sections
|
|
*/
|
|
if (sflag & SYM_SCT)
|
|
for (sp = sect; sp < §[outhead.oh_nsect]; sp++) {
|
|
ip = sp->s_item;
|
|
newsymb(
|
|
ip->i_name,
|
|
(short)(ip->i_type | S_SCT),
|
|
(short)0,
|
|
load(ip)
|
|
);
|
|
}
|
|
}
|