ref: 8188b4f4f0e07b6669e6ae3c6c1099af917eaab4
dir: /sys/src/cmd/2l/obj.c/
#define EXTERN
#include "l.h"
#include <ar.h>
#ifndef DEFAULT
#define DEFAULT '9'
#endif
char *noname = "<none>";
char symname[] = SYMDEF;
char thechar = '2';
char *thestring = "68020";
/*
* -H0 -T0x40004C -D0x10000000 is garbage unix
* -H1 -T0x80020000 -R4 is garbage format
* -H2 -T8224 -R8192 is plan9 format
* -H3 -Tx -Rx is next boot
*/
void
main(int argc, char *argv[])
{
int i, c;
char *a;
Binit(&bso, 1, OWRITE);
cout = -1;
listinit();
memset(debug, 0, sizeof(debug));
nerrors = 0;
outfile = "2.out";
HEADTYPE = -1;
INITTEXT = -1;
INITDAT = -1;
INITRND = -1;
INITENTRY = 0;
ARGBEGIN {
default:
c = ARGC();
if(c >= 0 && c < sizeof(debug))
debug[c]++;
break;
case 'o': /* output to (next arg) */
outfile = ARGF();
break;
case 'E':
a = ARGF();
if(a)
INITENTRY = a;
break;
case 'H':
a = ARGF();
if(a)
HEADTYPE = atolwhex(a);
break;
case 'T':
a = ARGF();
if(a)
INITTEXT = atolwhex(a);
break;
case 'D':
a = ARGF();
if(a)
INITDAT = atolwhex(a);
break;
case 'R':
a = ARGF();
if(a)
INITRND = atolwhex(a);
break;
} ARGEND
USED(argc);
if(*argv == 0) {
diag("usage: 2l [-options] objects");
errorexit();
}
if(!debug['9'] && !debug['U'] && !debug['B'])
debug[DEFAULT] = 1;
if(HEADTYPE == -1) {
if(debug['U'])
HEADTYPE = 2;
if(debug['B'])
HEADTYPE = 2;
if(debug['9'])
HEADTYPE = 2;
}
if(INITDAT != -1 && INITRND == -1)
INITRND = 0;
switch(HEADTYPE) {
default:
diag("unknown -H option %ld", HEADTYPE);
errorexit();
case 0: /* this is garbage */
HEADR = 20L+56L;
if(INITTEXT == -1)
INITTEXT = 0x40004CL;
if(INITDAT == -1)
INITDAT = 0x10000000L;
if(INITDAT != 0 && INITRND == -1)
INITRND = 0;
if(INITRND == -1)
INITRND = 0;
break;
case 1: /* plan9 boot data goes into text */
HEADR = 32L;
if(INITTEXT == -1)
INITTEXT = 8224;
if(INITDAT == -1)
INITDAT = 0;
if(INITDAT != 0 && INITRND == -1)
INITRND = 0;
if(INITRND == -1)
INITRND = 8192;
break;
case 2: /* plan 9 */
HEADR = 32L;
if(INITTEXT == -1)
INITTEXT = 8224;
if(INITDAT == -1)
INITDAT = 0;
if(INITDAT != 0 && INITRND == -1)
INITRND = 0;
if(INITRND == -1)
INITRND = 8192;
break;
case 3: /* next boot */
HEADR = 28+124+192+24;
if(INITTEXT == -1)
INITTEXT = 0x04002000;
if(INITDAT == -1)
INITDAT = 0;
if(INITDAT != 0 && INITRND == -1)
INITRND = 0;
if(INITRND == -1)
INITRND = 8192L;
break;
case 4: /* preprocess pilot */
HEADR = 32L;
if(INITTEXT == -1)
INITTEXT = 0;
if(INITDAT == -1)
INITDAT = 0;
if(INITDAT != 0 && INITRND == -1)
INITRND = 0;
if(INITRND == -1)
INITRND = 32;
break;
}
if(INITDAT != 0 && INITRND != 0)
print("warning: -D0x%lux is ignored because of -R0x%lux\n",
INITDAT, INITRND);
if(debug['v'])
Bprint(&bso, "HEADER = -H0x%ld -T0x%lux -D0x%lux -R0x%lux\n",
HEADTYPE, INITTEXT, INITDAT, INITRND);
Bflush(&bso);
for(i=1; optab[i].as; i++)
if(i != optab[i].as) {
diag("phase error in optab: %d", i);
errorexit();
}
zprg.link = P;
zprg.pcond = P;
zprg.back = 2;
zprg.as = AGOK;
zprg.from.type = D_NONE;
zprg.from.index = D_NONE;
zprg.to = zprg.from;
memset(special, 0, sizeof(special));
special[D_CCR] = 1;
special[D_SR] = 1;
special[D_SFC] = 1;
special[D_CACR] = 1;
special[D_USP] = 1;
special[D_VBR] = 1;
special[D_CAAR] = 1;
special[D_MSP] = 1;
special[D_ISP] = 1;
special[D_DFC] = 1;
special[D_FPCR] = 1;
special[D_FPSR] = 1;
special[D_FPIAR] = 1;
special[D_TC] = 1;
special[D_ITT0] = 1;
special[D_ITT1] = 1;
special[D_DTT0] = 1;
special[D_DTT1] = 1;
special[D_MMUSR] = 1;
special[D_URP] = 1;
special[D_SRP] = 1;
memset(simple, 0177, sizeof(simple));
for(i=0; i<8; i++) {
simple[D_R0+i] = i;
simple[D_F0+i] = i+0100;
simple[D_A0+i] = i+010;
simple[D_A0+I_INDIR+i] = i+020;
simple[D_A0+I_INDINC+i] = i+030;
simple[D_A0+I_INDDEC+i] = i+040;
}
nuxiinit();
histgen = 0;
textp = P;
datap = P;
pc = 0;
cout = create(outfile, 1, 0775);
if(cout < 0) {
diag("cannot create %s", outfile);
errorexit();
}
version = 0;
cbp = buf.cbuf;
cbc = sizeof(buf.cbuf);
firstp = prg();
lastp = firstp;
if(INITENTRY == 0) {
INITENTRY = "_main";
if(debug['p'])
INITENTRY = "_mainp";
if(!debug['l'])
lookup(INITENTRY, 0)->type = SXREF;
} else
lookup(INITENTRY, 0)->type = SXREF;
while(*argv)
objfile(*argv++);
if(!debug['l'])
loadlib();
firstp = firstp->link;
if(firstp == P)
errorexit();
patch();
if(debug['p'])
if(debug['1'])
doprof1();
else
doprof2();
follow();
dodata();
dostkoff();
span();
asmb();
undef();
if(debug['v']) {
Bprint(&bso, "%5.2f cpu time\n", cputime());
Bprint(&bso, "%ld+%ld = %ld data statements\n",
ndata, ncase, ndata+ncase);
Bprint(&bso, "%ld symbols\n", nsymbol);
Bprint(&bso, "%d sizeof adr\n", sizeof(Adr));
Bprint(&bso, "%d sizeof prog\n", sizeof(Prog));
}
Bflush(&bso);
errorexit();
}
void
loadlib(void)
{
int i;
long h;
Sym *s;
loop:
xrefresolv = 0;
for(i=0; i<libraryp; i++) {
if(debug['v'])
Bprint(&bso, "%5.2f autolib: %s (from %s)\n", cputime(), library[i], libraryobj[i]);
objfile(library[i]);
}
if(xrefresolv)
for(h=0; h<nelem(hash); h++)
for(s = hash[h]; s != S; s = s->link)
if(s->type == SXREF)
goto loop;
}
void
errorexit(void)
{
Bflush(&bso);
if(nerrors) {
if(cout >= 0)
remove(outfile);
exits("error");
}
exits(0);
}
void
objfile(char *file)
{
long off, esym, cnt, l;
int f, work;
Sym *s;
char magbuf[SARMAG];
char name[100], pname[150];
struct ar_hdr arhdr;
char *e, *start, *stop;
if(file[0] == '-' && file[1] == 'l') {
if(debug['9'])
snprint(name, sizeof name, "/%s/lib/lib%s.a", thestring, file+2);
else
snprint(name, sizeof name, "/usr/%clib/lib%s.a", thechar, file+2);
file = name;
}
if(debug['v'])
Bprint(&bso, "%5.2f ldobj: %s\n", cputime(), file);
Bflush(&bso);
f = open(file, 0);
if(f < 0) {
diag("cannot open file: %s", file);
errorexit();
}
l = read(f, magbuf, SARMAG);
if(l != SARMAG || strncmp(magbuf, ARMAG, SARMAG)){
/* load it as a regular file */
l = seek(f, 0L, 2);
seek(f, 0L, 0);
ldobj(f, l, file);
close(f);
return;
}
l = read(f, &arhdr, SAR_HDR);
if(l != SAR_HDR) {
diag("%s: short read on archive file symbol header", file);
goto out;
}
if(strncmp(arhdr.name, symname, strlen(symname))) {
diag("%s: first entry not symbol header", file);
goto out;
}
esym = SARMAG + SAR_HDR + atolwhex(arhdr.size);
off = SARMAG + SAR_HDR;
/*
* just bang the whole symbol file into memory
*/
seek(f, off, 0);
cnt = esym - off;
start = malloc(cnt + 10);
cnt = read(f, start, cnt);
if(cnt <= 0){
close(f);
return;
}
stop = &start[cnt];
memset(stop, 0, 10);
work = 1;
while(work){
if(debug['v'])
Bprint(&bso, "%5.2f library pass: %s\n", cputime(), file);
Bflush(&bso);
work = 0;
for(e = start; e < stop; e = strchr(e+5, 0) + 1) {
s = lookup(e+5, 0);
if(s->type != SXREF)
continue;
snprint(pname, sizeof pname, "%s(%s)", file, s->name);
if(debug['v'])
Bprint(&bso, "%5.2f library: %s\n", cputime(), pname);
Bflush(&bso);
l = e[1] & 0xff;
l |= (e[2] & 0xff) << 8;
l |= (e[3] & 0xff) << 16;
l |= (e[4] & 0xff) << 24;
seek(f, l, 0);
l = read(f, &arhdr, SAR_HDR);
if(l != SAR_HDR)
goto bad;
if(strncmp(arhdr.fmag, ARFMAG, sizeof(arhdr.fmag)))
goto bad;
l = atolwhex(arhdr.size);
ldobj(f, l, pname);
if(s->type == SXREF) {
diag("%s: failed to load: %s", file, s->name);
errorexit();
}
work = 1;
xrefresolv = 1;
}
}
return;
bad:
diag("%s: bad or out of date archive", file);
out:
close(f);
}
int
zaddr(uchar *p, Adr *a, Sym *h[])
{
int c, t, i;
long l;
Sym *s;
Auto *u;
t = p[0];
/*
* first try the high-time formats
*/
if(t == 0) {
a->index = D_NONE;
a->type = p[1];
return 2;
}
if(t == T_OFFSET) {
a->index = D_NONE;
a->offset = p[1] | (p[2]<<8) | (p[3]<<16) | (p[4]<<24);
a->type = p[5];
return 6;
}
if(t == (T_OFFSET|T_SYM)) {
a->index = D_NONE;
a->offset = p[1] | (p[2]<<8) | (p[3]<<16) | (p[4]<<24);
s = h[p[5]];
a->sym = s;
a->type = p[6];
c = 7;
goto dosym;
}
if(t == T_SYM) {
a->index = D_NONE;
s = h[p[1]];
a->sym = s;
a->type = p[2];
c = 3;
goto dosym;
}
if(t == (T_INDEX|T_OFFSET|T_SYM)) {
a->index = p[1] | (p[2]<<8);
a->scale = p[3];
a->displace = p[4] | (p[5]<<8) | (p[6]<<16) | (p[7]<<24);
a->offset = p[8] | (p[9]<<8) | (p[10]<<16) | (p[11]<<24);
s = h[p[12]];
a->sym = s;
a->type = p[13];
c = 14;
goto dosym;
}
/*
* now do it the hard way
*/
c = 1;
a->index = D_NONE;
if(t & T_FIELD) {
a->field = p[c] | (p[c+1]<<8);
c += 2;
}
if(t & T_INDEX) {
a->index = p[c] | (p[c+1]<<8);
a->scale = p[c+2];
a->displace = p[c+3] | (p[c+4]<<8) | (p[c+5]<<16) | (p[c+6]<<24);
c += 7;
}
if(t & T_OFFSET) {
a->offset = p[c] | (p[c+1]<<8) | (p[c+2]<<16) | (p[c+3]<<24);
c += 4;
}
if(t & T_SYM) {
a->sym = h[p[c]];
c += 1;
}
if(t & T_FCONST) {
a->ieee.l = p[c] | (p[c+1]<<8) | (p[c+2]<<16) | (p[c+3]<<24);
a->ieee.h = p[c+4] | (p[c+5]<<8) | (p[c+6]<<16) | (p[c+7]<<24);
c += 8;
a->type = D_FCONST;
} else
if(t & T_SCONST) {
for(i=0; i<NSNAME; i++)
a->scon[i] = p[c+i];
c += NSNAME;
a->type = D_SCONST;
} else
if(t & T_TYPE) {
a->type = p[c] | (p[c+1]<<8);
c += 2;
} else {
a->type = p[c];
c++;
}
s = a->sym;
if(s == S)
return c;
dosym:
t = a->type & D_MASK;
if(t != D_AUTO && t != D_PARAM)
return c;
l = a->offset;
for(u=curauto; u; u=u->link) {
if(u->asym == s)
if(u->type == t) {
if(u->aoffset > l)
u->aoffset = l;
return c;
}
}
u = malloc(sizeof(Auto));
u->link = curauto;
curauto = u;
u->asym = s;
u->aoffset = l;
u->type = t;
return c;
}
void
addlib(char *obj)
{
char name[1024], comp[256], *p;
int i;
if(histfrogp <= 0)
return;
if(histfrog[0]->name[1] == '/') {
name[0] = 0;
i = 1;
} else
if(histfrog[0]->name[1] == '.') {
snprint(name, sizeof name, ".");
i = 0;
} else {
if(debug['9'])
snprint(name, sizeof name, "/%s/lib", thestring);
else
snprint(name, sizeof name, "/usr/%clib", thechar);
i = 0;
}
for(; i<histfrogp; i++) {
snprint(comp, sizeof comp, histfrog[i]->name+1);
for(;;) {
p = strstr(comp, "$O");
if(p == 0)
break;
memmove(p+1, p+2, strlen(p+2)+1);
p[0] = thechar;
}
for(;;) {
p = strstr(comp, "$M");
if(p == 0)
break;
if(strlen(comp)+strlen(thestring)-2+1 >= sizeof comp) {
diag("library component too long");
return;
}
memmove(p+strlen(thestring), p+2, strlen(p+2)+1);
memmove(p, thestring, strlen(thestring));
}
if(strlen(name) + strlen(comp) + 3 >= sizeof(name)) {
diag("library component too long");
return;
}
strcat(name, "/");
strcat(name, comp);
}
for(i=0; i<libraryp; i++)
if(strcmp(name, library[i]) == 0)
return;
if(libraryp == nelem(library)){
diag("too many autolibs; skipping %s", name);
return;
}
p = malloc(strlen(name) + 1);
strcpy(p, name);
library[libraryp] = p;
p = malloc(strlen(obj) + 1);
strcpy(p, obj);
libraryobj[libraryp] = p;
libraryp++;
}
void
addhist(long line, int type)
{
Auto *u;
Sym *s;
int i, j, k;
u = malloc(sizeof(Auto));
s = malloc(sizeof(Sym));
s->name = malloc(2*(histfrogp+1) + 1);
u->asym = s;
u->type = type;
u->aoffset = line;
u->link = curhist;
curhist = u;
j = 1;
for(i=0; i<histfrogp; i++) {
k = histfrog[i]->value;
s->name[j+0] = k>>8;
s->name[j+1] = k;
j += 2;
}
}
void
histtoauto(void)
{
Auto *l;
while(l = curhist) {
curhist = l->link;
l->link = curauto;
curauto = l;
}
}
void
collapsefrog(Sym *s)
{
int i;
/*
* bad encoding of path components only allows
* MAXHIST components. if there is an overflow,
* first try to collapse xxx/..
*/
for(i=1; i<histfrogp; i++)
if(strcmp(histfrog[i]->name+1, "..") == 0) {
memmove(histfrog+i-1, histfrog+i+1,
(histfrogp-i-1)*sizeof(histfrog[0]));
histfrogp--;
goto out;
}
/*
* next try to collapse .
*/
for(i=0; i<histfrogp; i++)
if(strcmp(histfrog[i]->name+1, ".") == 0) {
memmove(histfrog+i, histfrog+i+1,
(histfrogp-i-1)*sizeof(histfrog[0]));
goto out;
}
/*
* last chance, just truncate from front
*/
memmove(histfrog+0, histfrog+1,
(histfrogp-1)*sizeof(histfrog[0]));
out:
histfrog[histfrogp-1] = s;
}
uchar*
readsome(int f, uchar *buf, uchar *good, uchar *stop, int max)
{
int n;
n = stop - good;
memmove(buf, good, stop - good);
stop = buf + n;
n = MAXIO - n;
if(n > max)
n = max;
n = read(f, stop, n);
if(n <= 0)
return 0;
return stop + n;
}
void
ldobj(int f, long c, char *pn)
{
Prog *p;
Sym *h[NSYM], *s;
int v, o, r;
long ipc, lv;
double dv;
uchar *bloc, *bsize, *stop;
bsize = buf.xbuf;
bloc = buf.xbuf;
newloop:
memset(h, 0, sizeof(h));
version++;
histfrogp = 0;
ipc = pc;
loop:
if(c <= 0)
goto eof;
r = bsize - bloc;
if(r < 100 && r < c) { /* enough for largest prog */
bsize = readsome(f, buf.xbuf, bloc, bsize, c);
if(bsize == 0)
goto eof;
bloc = buf.xbuf;
goto loop;
}
o = bloc[0] | (bloc[1] << 8);
if(o <= AXXX || o >= ALAST) {
if(o < 0)
goto eof;
diag("%s: opcode out of range %d", pn, o);
print(" probably not a .2 file\n");
errorexit();
}
if(o == ANAME || o == ASIGNAME) {
if(o == ASIGNAME) {
bloc += 4;
c -= 4;
}
stop = memchr(&bloc[4], 0, bsize-&bloc[4]);
if(stop == 0){
bsize = readsome(f, buf.xbuf, bloc, bsize, c);
if(bsize == 0)
goto eof;
bloc = buf.xbuf;
stop = memchr(&bloc[4], 0, bsize-&bloc[4]);
if(stop == 0){
fprint(2, "%s: name too long\n", pn);
errorexit();
}
}
v = bloc[2]; /* type */
o = bloc[3]; /* sym */
bloc += 4;
c -= 4;
r = 0;
if(v == D_STATIC)
r = version;
s = lookup((char*)bloc, r);
c -= &stop[1] - bloc;
bloc = stop + 1;
if(debug['W'])
print(" ANAME %s\n", s->name);
h[o] = s;
if((v == D_EXTERN || v == D_STATIC) && s->type == 0)
s->type = SXREF;
if(v == D_FILE) {
if(s->type != SFILE) {
histgen++;
s->type = SFILE;
s->value = histgen;
}
if(histfrogp < MAXHIST) {
histfrog[histfrogp] = s;
histfrogp++;
} else
collapsefrog(s);
}
goto loop;
}
p = malloc(sizeof(Prog));
p->as = o;
p->line = bloc[2] | (bloc[3] << 8) | (bloc[4] << 16) | (bloc[5] << 24);
p->back = 2;
r = zaddr(bloc+6, &p->from, h) + 6;
r += zaddr(bloc+r, &p->to, h);
bloc += r;
c -= r;
if(debug['W'])
print("%P\n", p);
switch(p->as) {
case AHISTORY:
if(p->to.offset == -1) {
addlib(pn);
histfrogp = 0;
goto loop;
}
addhist(p->line, D_FILE); /* 'z' */
if(p->to.offset)
addhist(p->to.offset, D_FILE1); /* 'Z' */
histfrogp = 0;
goto loop;
case AEND:
histtoauto();
if(curtext != P)
curtext->to.autom = curauto;
curauto = 0;
curtext = P;
if(c)
goto newloop;
return;
case AGLOBL:
s = p->from.sym;
if(s->type == 0 || s->type == SXREF) {
s->type = SBSS;
s->value = 0;
}
if(s->type != SBSS) {
diag("%s: redefinition: %s in %s",
pn, s->name, TNAME);
s->type = SBSS;
s->value = 0;
}
if(p->to.offset > s->value)
s->value = p->to.offset;
goto loop;
case ABCASE:
ncase++;
goto casdef;
case ADATA:
p->link = datap;
datap = p;
ndata++;
goto loop;
case AGOK:
diag("%s: unknown opcode in %s", pn, TNAME);
pc++;
goto loop;
case ATEXT:
if(curtext != P) {
histtoauto();
curtext->to.autom = curauto;
curauto = 0;
}
curtext = p;
lastp->link = p;
lastp = p;
p->pc = pc;
s = p->from.sym;
if(s->type != 0 && s->type != SXREF)
diag("%s: redefinition: %s", pn, s->name);
s->type = STEXT;
s->value = p->pc;
pc++;
p->pcond = P;
if(textp == P) {
textp = p;
etextp = p;
goto loop;
}
etextp->pcond = p;
etextp = p;
goto loop;
case AJSR:
p->as = ABSR;
case ABSR:
if(p->to.index != D_NONE)
p->as = AJSR;
if(p->to.type != D_EXTERN && p->to.type != D_STATIC)
p->as = AJSR;
goto casdef;
case AMOVL:
case AMOVB:
case AMOVW:
if(p->from.type != D_CONST)
goto casdef;
lv = p->from.offset;
if(lv >= -128 && lv < 128)
if(p->to.type >= D_R0 && p->to.type < D_R0+8)
if(p->to.index == D_NONE) {
p->from.type = D_QUICK;
goto casdef;
}
if(lv >= -0x7fff && lv <= 0x7fff)
if(p->to.type >= D_A0 && p->to.type < D_A0+8)
if(p->to.index == D_NONE)
if(p->as == AMOVL)
p->as = AMOVW;
goto casdef;
case AADDB:
case AADDL:
case AADDW:
if(p->from.type != D_CONST)
goto casdef;
lv = p->from.offset;
if(lv < 0) {
lv = -lv;
p->from.offset = lv;
if(p->as == AADDB)
p->as = ASUBB;
else
if(p->as == AADDW)
p->as = ASUBW;
else
if(p->as == AADDL)
p->as = ASUBL;
}
if(lv > 0)
if(lv <= 8)
p->from.type = D_QUICK;
goto casdef;
case ASUBB:
case ASUBL:
case ASUBW:
if(p->from.type != D_CONST)
goto casdef;
lv = p->from.offset;
if(lv < 0) {
lv = -lv;
p->from.offset = lv;
if(p->as == ASUBB)
p->as = AADDB;
else
if(p->as == ASUBW)
p->as = AADDW;
else
if(p->as == ASUBL)
p->as = AADDL;
}
if(lv > 0)
if(lv <= 8)
p->from.type = D_QUICK;
goto casdef;
case AROTRB:
case AROTRL:
case AROTRW:
case AROTLB:
case AROTLL:
case AROTLW:
case AASLB:
case AASLL:
case AASLW:
case AASRB:
case AASRL:
case AASRW:
case ALSLB:
case ALSLL:
case ALSLW:
case ALSRB:
case ALSRL:
case ALSRW:
if(p->from.type == D_CONST)
if(p->from.offset > 0)
if(p->from.offset <= 8)
p->from.type = D_QUICK;
goto casdef;
case ATSTL:
if(p->to.type >= D_A0 && p->to.type < D_A0+8) {
p->as = ACMPW;
p->from = p->to;
p->to.type = D_CONST;
p->to.offset = 0;
}
goto casdef;
case ACMPL:
if(p->to.type != D_CONST)
goto casdef;
lv = p->to.offset;
if(lv >= -0x7fff && lv <= 0x7fff)
if(p->from.type >= D_A0 && p->from.type < D_A0+8)
if(p->from.index == D_NONE)
p->as = ACMPW;
goto casdef;
case ACLRL:
if(p->to.type >= D_A0 && p->to.type < D_A0+8) {
p->as = AMOVW;
p->from.type = D_CONST;
p->from.offset = 0;
}
goto casdef;
casdef:
default:
if(p->from.type == D_FCONST)
if(optab[p->as].fas != AXXX) {
dv = ieeedtod(&p->from.ieee);
if(dv >= -(1L<<30) && dv <= (1L<<30)) {
lv = dv;
if(lv == dv) {
p->as = optab[p->as].fas;
p->from.type = D_CONST;
p->from.offset = lv;
p->from.displace = 0;
}
}
}
if(p->to.type == D_BRANCH)
p->to.offset += ipc;
lastp->link = p;
lastp = p;
p->pc = pc;
pc++;
goto loop;
}
/* not reached */
eof:
diag("%s: truncated object file in %s", pn, TNAME);
}
Sym*
lookup(char *symb, int v)
{
Sym *s;
char *p;
long h;
int l, c;
h = v;
for(p=symb; c = *p; p++)
h = h+h+h + c;
l = (p - symb) + 1;
if(h < 0)
h = ~h;
h %= NHASH;
for(s = hash[h]; s != S; s = s->link)
if(s->version == v)
if(memcmp(s->name, symb, l) == 0)
return s;
s = malloc(sizeof(Sym));
s->name = malloc(l + 1);
memmove(s->name, symb, l);
s->link = hash[h];
s->type = 0;
s->version = v;
s->value = 0;
hash[h] = s;
nsymbol++;
return s;
}
Prog*
prg(void)
{
Prog *p = malloc(sizeof(Prog));
*p = zprg;
return p;
}
Prog*
copyp(Prog *q)
{
Prog *p;
p = prg();
*p = *q;
return p;
}
Prog*
appendp(Prog *q)
{
Prog *p;
p = prg();
p->link = q->link;
q->link = p;
p->line = q->line;
return p;
}
void
doprof1(void)
{
Sym *s;
long n;
Prog *p, *q;
if(debug['v'])
Bprint(&bso, "%5.2f profile 1\n", cputime());
Bflush(&bso);
s = lookup("__mcount", 0);
n = 1;
for(p = firstp->link; p != P; p = p->link) {
if(p->as == ATEXT) {
q = prg();
q->as = AADDL;
q->line = p->line;
q->pc = p->pc;
q->link = p->link;
p->link = q;
q->from.type = D_CONST;
q->from.offset = 1;
q->to.type = D_EXTERN;
q->to.sym = s;
q->to.offset = n*4 + 4;
q = prg();
q->as = ADATA;
q->line = p->line;
q->link = datap;
datap = q;
q->from.type = D_EXTERN;
q->from.sym = s;
q->from.offset = n*4;
q->from.displace = 4;
q->to.type = D_EXTERN;
q->to.sym = p->from.sym;
n += 2;
continue;
}
}
q = prg();
q->line = 0;
q->as = ADATA;
q->link = datap;
datap = q;
q->from.type = D_EXTERN;
q->from.sym = s;
q->from.displace = 4;
q->to.type = D_CONST;
q->to.offset = n;
s->type = SBSS;
s->value = n*4;
}
void
doprof2(void)
{
Sym *s2, *s4;
Prog *p, *q, *q2, *ps2, *ps4;
if(debug['v'])
Bprint(&bso, "%5.2f profile 2\n", cputime());
Bflush(&bso);
if(debug['e']){
s2 = lookup("_tracein", 0);
s4 = lookup("_traceout", 0);
}else{
s2 = lookup("_profin", 0);
s4 = lookup("_profout", 0);
}
if(s2->type != STEXT || s4->type != STEXT) {
if(debug['e'])
diag("_tracein/_traceout not defined %d %d", s2->type, s4->type);
else
diag("_profin/_profout not defined");
return;
}
ps2 = P;
ps4 = P;
for(p = firstp; p != P; p = p->link) {
if(p->as == ATEXT) {
if(p->from.sym == s2) {
ps2 = p;
p->from.displace = 1;
}
if(p->from.sym == s4) {
ps4 = p;
p->from.displace = 1;
}
}
}
for(p = firstp; p != P; p = p->link) {
if(p->as == ATEXT) {
if(p->from.displace != 0) {
for(;;) {
q = p->link;
if(q == P)
break;
if(q->as == ATEXT)
break;
p = q;
}
continue;
}
q = prg();
q->line = p->line;
q->pc = p->pc;
q->link = p->link;
if(debug['e']){ /* embedded tracing */
q2 = prg();
p->link = q2;
q2->link = q;
q2->line = p->line;
q2->pc = p->pc;
q2->as = AJMP;
q2->to.type = D_BRANCH;
q2->to.sym = p->to.sym;
q2->pcond = q->link;
}else
p->link = q;
p = q;
p->as = ABSR;
p->to.type = D_BRANCH;
p->pcond = ps2;
p->to.sym = s2;
continue;
}
if(p->as == ARTS) {
/*
* RTS (default)
*/
if(debug['e']){ /* embedded tracing */
q = prg();
q->line = p->line;
q->pc = p->pc;
q->link = p->link;
p->link = q;
p = q;
}
/*
* RTS
*/
q = prg();
q->as = ARTS;
q->from = p->from;
q->to = p->to;
q->link = p->link;
p->link = q;
/*
* BSR profout
*/
p->as = ABSR;
p->from = zprg.from;
p->to = zprg.to;
p->to.type = D_BRANCH;
p->pcond = ps4;
p->to.sym = s4;
p = q;
continue;
}
}
}
long
reuse(Prog *r, Sym *s)
{
Prog *p;
if(r == P)
return 0;
for(p = datap; p != r; p = p->link)
if(p->to.sym == s)
return p->from.offset;
return 0;
}
void
nuxiinit(void)
{
int i, c;
for(i=0; i<4; i++) {
c = find1(0x01020304L, i+1);
if(i >= 2)
inuxi2[i-2] = c;
if(i >= 3)
inuxi1[i-3] = c;
inuxi4[i] = c;
fnuxi8[i] = c+4;
fnuxi8[i+4] = c;
c = find2(0x01020304L, i+1);
gnuxi8[i] = c+4;
gnuxi8[i+4] = c;
}
if(debug['v']) {
Bprint(&bso, "inuxi = ");
for(i=0; i<1; i++)
Bprint(&bso, "%d", inuxi1[i]);
Bprint(&bso, " ");
for(i=0; i<2; i++)
Bprint(&bso, "%d", inuxi2[i]);
Bprint(&bso, " ");
for(i=0; i<4; i++)
Bprint(&bso, "%d", inuxi4[i]);
Bprint(&bso, "\n[fg]nuxi = ");
for(i=0; i<8; i++)
Bprint(&bso, "%d", fnuxi8[i]);
Bprint(&bso, " ");
for(i=0; i<8; i++)
Bprint(&bso, "%d", gnuxi8[i]);
Bprint(&bso, "\n");
}
Bflush(&bso);
}
int
find1(long l, int c)
{
char *p;
int i;
p = (char*)&l;
for(i=0; i<4; i++)
if(*p++ == c)
return i;
return 0;
}
int
find2(long l, int c)
{
short *p;
int i;
p = (short*)&l;
for(i=0; i<4; i+=2) {
if(((*p >> 8) & 0xff) == c)
return i;
if((*p++ & 0xff) == c)
return i+1;
}
return 0;
}
long
ieeedtof(Ieee *e)
{
int exp;
long v;
if(e->h == 0)
return 0;
exp = (e->h>>20) & ((1L<<11)-1L);
exp -= (1L<<10) - 2L;
v = (e->h & 0xfffffL) << 3;
v |= (e->l >> 29) & 0x7L;
if((e->l >> 28) & 1) {
v++;
if(v & 0x800000L) {
v = (v & 0x7fffffL) >> 1;
exp++;
}
}
if(exp <= -126 || exp >= 130)
diag("double fp to single fp overflow");
v |= ((exp + 126) & 0xffL) << 23;
v |= e->h & 0x80000000L;
return v;
}
double
ieeedtod(Ieee *ieeep)
{
Ieee e;
double fr;
int exp;
if(ieeep->h & (1L<<31)) {
e.h = ieeep->h & ~(1L<<31);
e.l = ieeep->l;
return -ieeedtod(&e);
}
if(ieeep->l == 0 && ieeep->h == 0)
return 0;
fr = ieeep->l & ((1L<<16)-1L);
fr /= 1L<<16;
fr += (ieeep->l>>16) & ((1L<<16)-1L);
fr /= 1L<<16;
fr += (ieeep->h & (1L<<20)-1L) | (1L<<20);
fr /= 1L<<21;
exp = (ieeep->h>>20) & ((1L<<11)-1L);
exp -= (1L<<10) - 2L;
return ldexp(fr, exp);
}