ref: d4bc9052beb3305d64a353a16641740380eb87af
dir: /sys/src/cmd/5l/obj.c/
#define EXTERN
#include "l.h"
#include <ar.h>
#ifndef DEFAULT
#define DEFAULT '9'
#endif
char *noname = "<none>";
char symname[] = SYMDEF;
char thechar = '5';
char *thestring = "arm";
/*
* -H0 no header
* -H1 -T0x10005000 -R4 is aif for risc os
* -H2 -T4128 -R4096 is plan9 format
* -H3 -T0xF0000020 -R4 is NetBSD format
* -H4 is IXP1200 (raw)
* -H5 -T0xC0008010 -R1024 is ipaq
* -H6 -R4096 no header with segments padded to pages
* -H7 is elf
*/
static int
isobjfile(char *f)
{
int n, v;
Biobuf *b;
char buf1[5], buf2[SARMAG];
b = Bopen(f, OREAD);
if(b == nil)
return 0;
n = Bread(b, buf1, 5);
if(n == 5 && (buf1[2] == 1 && buf1[3] == '<' || buf1[3] == 1 && buf1[4] == '<'))
v = 1; /* good enough for our purposes */
else{
Bseek(b, 0, 0);
n = Bread(b, buf2, SARMAG);
v = n == SARMAG && strncmp(buf2, ARMAG, SARMAG) == 0;
}
Bterm(b);
return v;
}
void
main(int argc, char *argv[])
{
int c;
char *a;
Binit(&bso, 1, OWRITE);
cout = -1;
listinit();
outfile = 0;
nerrors = 0;
curtext = P;
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':
outfile = ARGF();
break;
case 'E':
a = ARGF();
if(a)
INITENTRY = 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;
case 'H':
a = ARGF();
if(a)
HEADTYPE = atolwhex(a);
/* do something about setting INITTEXT */
break;
case 'x': /* produce export table */
doexp = 1;
if(argv[1] != nil && argv[1][0] != '-' && !isobjfile(argv[1]))
readundefs(ARGF(), SEXPORT);
break;
case 'u': /* produce dynamically loadable module */
dlm = 1;
if(argv[1] != nil && argv[1][0] != '-' && !isobjfile(argv[1]))
readundefs(ARGF(), SIMPORT);
break;
} ARGEND
USED(argc);
if(*argv == 0) {
diag("usage: 5l [-options] objects");
errorexit();
}
if(!debug['9'] && !debug['U'] && !debug['B'])
debug[DEFAULT] = 1;
if(HEADTYPE == -1) {
if(debug['U'])
HEADTYPE = 0;
if(debug['B'])
HEADTYPE = 1;
if(debug['9'])
HEADTYPE = 2;
}
switch(HEADTYPE) {
default:
diag("unknown -H option");
errorexit();
case 0: /* no header */
case 6: /* no header, padded segments */
HEADR = 0L;
if(INITTEXT == -1)
INITTEXT = 0;
if(INITDAT == -1)
INITDAT = 0;
if(INITRND == -1)
INITRND = 4;
break;
case 1: /* aif for risc os */
HEADR = 128L;
if(INITTEXT == -1)
INITTEXT = 0x10005000 + HEADR;
if(INITDAT == -1)
INITDAT = 0;
if(INITRND == -1)
INITRND = 4;
break;
case 2: /* plan 9 */
HEADR = 32L;
if(INITTEXT == -1)
INITTEXT = 4128;
if(INITDAT == -1)
INITDAT = 0;
if(INITRND == -1)
INITRND = 4096;
break;
case 3: /* boot for NetBSD */
HEADR = 32L;
if(INITTEXT == -1)
INITTEXT = 0xF0000020L;
if(INITDAT == -1)
INITDAT = 0;
if(INITRND == -1)
INITRND = 4096;
break;
case 4: /* boot for IXP1200 */
HEADR = 0L;
if(INITTEXT == -1)
INITTEXT = 0x0;
if(INITDAT == -1)
INITDAT = 0;
if(INITRND == -1)
INITRND = 4;
break;
case 5: /* boot for ipaq */
HEADR = 16L;
if(INITTEXT == -1)
INITTEXT = 0xC0008010;
if(INITDAT == -1)
INITDAT = 0;
if(INITRND == -1)
INITRND = 1024;
break;
case 7: /* elf executable */
HEADR = rnd(52L+3*32L, 16);
if(INITTEXT == -1)
INITTEXT = 4096+HEADR;
if(INITDAT == -1)
INITDAT = 0;
if(INITRND == -1)
INITRND = 4;
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%d -T0x%lux -D0x%lux -R0x%lux\n",
HEADTYPE, INITTEXT, INITDAT, INITRND);
Bflush(&bso);
zprg.as = AGOK;
zprg.scond = 14;
zprg.reg = NREG;
zprg.from.name = D_NONE;
zprg.from.type = D_NONE;
zprg.from.reg = NREG;
zprg.to = zprg.from;
buildop();
histgen = 0;
textp = P;
datap = P;
pc = 0;
dtype = 4;
if(outfile == 0)
outfile = "5.out";
cout = create(outfile, 1, 0775);
if(cout < 0) {
diag("%s: cannot create", outfile);
errorexit();
}
nuxiinit();
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)
goto out;
if(doexp || dlm){
EXPTAB = "_exporttab";
zerosig(EXPTAB);
zerosig("etext");
zerosig("edata");
zerosig("end");
if(dlm){
initdiv();
import();
HEADTYPE = 2;
INITTEXT = INITDAT = 0;
INITRND = 8;
INITENTRY = EXPTAB;
}
else
divsig();
export();
}
patch();
if(debug['p'])
if(debug['1'])
doprof1();
else
doprof2();
dodata();
follow();
if(firstp == P)
goto out;
noops();
span();
asmb();
undef();
out:
if(debug['v']) {
Bprint(&bso, "%5.2f cpu time\n", cputime());
Bprint(&bso, "%ld memory used\n", thunk);
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\n", cputime(), library[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)
{
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;
}
if(debug['v'])
Bprint(&bso, "%5.2f ldlib: %s\n", cputime(), file);
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 i, c;
long l;
Sym *s;
Auto *u;
c = p[2];
if(c < 0 || c > NSYM){
print("sym out of range: %d\n", c);
p[0] = ALAST+1;
return 0;
}
a->type = p[0];
a->reg = p[1];
a->sym = h[c];
a->name = p[3];
c = 4;
if(a->reg < 0 || a->reg > NREG) {
print("register out of range %d\n", a->reg);
p[0] = ALAST+1;
return 0; /* force real diagnostic */
}
switch(a->type) {
default:
print("unknown type %d\n", a->type);
p[0] = ALAST+1;
return 0; /* force real diagnostic */
case D_NONE:
case D_REG:
case D_FREG:
case D_PSR:
case D_FPCR:
break;
case D_REGREG:
a->offset = p[4];
c++;
break;
case D_BRANCH:
case D_OREG:
case D_CONST:
case D_OCONST:
case D_SHIFT:
a->offset = p[4] | (p[5]<<8) |
(p[6]<<16) | (p[7]<<24);
c += 4;
break;
case D_SCONST:
while(nhunk < NSNAME)
gethunk();
a->sval = (char*)hunk;
nhunk -= NSNAME;
hunk += NSNAME;
memmove(a->sval, p+4, NSNAME);
c += NSNAME;
break;
case D_FCONST:
while(nhunk < sizeof(Ieee))
gethunk();
a->ieee = (Ieee*)hunk;
nhunk -= NSNAME;
hunk += NSNAME;
a->ieee->l = p[4] | (p[5]<<8) |
(p[6]<<16) | (p[7]<<24);
a->ieee->h = p[8] | (p[9]<<8) |
(p[10]<<16) | (p[11]<<24);
c += 8;
break;
}
s = a->sym;
if(s == S)
return c;
i = a->name;
if(i != D_AUTO && i != D_PARAM)
return c;
l = a->offset;
for(u=curauto; u; u=u->link)
if(u->asym == s)
if(u->type == i) {
if(u->aoffset > l)
u->aoffset = l;
return c;
}
while(nhunk < sizeof(Auto))
gethunk();
u = (Auto*)hunk;
nhunk -= sizeof(Auto);
hunk += sizeof(Auto);
u->link = curauto;
curauto = u;
u->asym = s;
u->aoffset = l;
u->type = i;
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;
}
void
nopout(Prog *p)
{
p->as = ANOP;
p->from.type = D_NONE;
p->to.type = D_NONE;
}
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)
{
long ipc;
Prog *p, *t;
uchar *bloc, *bsize, *stop;
Sym *h[NSYM], *s, *di;
int v, o, r, skip;
ulong sig;
static int files;
static char **filen;
char **nfilen;
if((files&15) == 0){
nfilen = malloc((files+16)*sizeof(char*));
memmove(nfilen, filen, files*sizeof(char*));
free(filen);
filen = nfilen;
}
filen[files++] = strdup(pn);
bsize = buf.xbuf;
bloc = buf.xbuf;
di = S;
newloop:
memset(h, 0, sizeof(h));
version++;
histfrogp = 0;
ipc = pc;
skip = 0;
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]; /* as */
if(o <= AXXX || o >= ALAST) {
diag("%s: line %ld: opcode out of range %d", pn, pc-ipc, o);
print(" probably not a .5 file\n");
errorexit();
}
if(o == ANAME || o == ASIGNAME) {
sig = 0;
if(o == ASIGNAME){
sig = bloc[1] | (bloc[2]<<8) | (bloc[3]<<16) | (bloc[4]<<24);
bloc += 4;
c -= 4;
}
stop = memchr(&bloc[3], 0, bsize-&bloc[3]);
if(stop == 0){
bsize = readsome(f, buf.xbuf, bloc, bsize, c);
if(bsize == 0)
goto eof;
bloc = buf.xbuf;
stop = memchr(&bloc[3], 0, bsize-&bloc[3]);
if(stop == 0){
fprint(2, "%s: name too long\n", pn);
errorexit();
}
}
v = bloc[1]; /* type */
o = bloc[2]; /* sym */
bloc += 3;
c -= 3;
r = 0;
if(v == D_STATIC)
r = version;
s = lookup((char*)bloc, r);
c -= &stop[1] - bloc;
bloc = stop + 1;
if(sig != 0){
if(s->sig != 0 && s->sig != sig)
diag("incompatible type signatures %lux(%s) and %lux(%s) for %s", s->sig, filen[s->file], sig, pn, s->name);
s->sig = sig;
s->file = files-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;
}
if(nhunk < sizeof(Prog))
gethunk();
p = (Prog*)hunk;
nhunk -= sizeof(Prog);
hunk += sizeof(Prog);
p->as = o;
p->scond = bloc[1];
p->reg = bloc[2];
p->line = bloc[3] | (bloc[4]<<8) | (bloc[5]<<16) | (bloc[6]<<24);
r = zaddr(bloc+7, &p->from, h) + 7;
r += zaddr(bloc+r, &p->to, h);
bloc += r;
c -= r;
if(p->reg > NREG)
diag("register out of range %d", p->reg);
p->link = P;
p->cond = P;
if(debug['W'])
print("%P\n", p);
switch(o) {
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 == S) {
diag("GLOBL must have a name\n%P", p);
errorexit();
}
if(p->reg & DUPOK)
s->dupok = 1;
if(s->type == 0 || s->type == SXREF) {
s->type = SBSS;
s->value = 0;
}
if(s->type != SBSS) {
diag("redefinition: %s\n%P", s->name, p);
s->type = SBSS;
s->value = 0;
}
if(p->to.offset > s->value)
s->value = p->to.offset;
break;
case ADYNT:
if(p->to.sym == S) {
diag("DYNT without a sym\n%P", p);
break;
}
di = p->to.sym;
p->reg = 4;
if(di->type == SXREF) {
if(debug['z'])
Bprint(&bso, "%P set to %d\n", p, dtype);
di->type = SCONST;
di->value = dtype;
dtype += 4;
}
if(p->from.sym == S)
break;
p->from.offset = di->value;
p->from.sym->type = SDATA;
if(curtext == P) {
diag("DYNT not in text: %P", p);
break;
}
p->to.sym = curtext->from.sym;
p->to.type = D_CONST;
p->link = datap;
datap = p;
break;
case AINIT:
if(p->from.sym == S) {
diag("INIT without a sym\n%P", p);
break;
}
if(di == S) {
diag("INIT without previous DYNT\n%P", p);
break;
}
p->from.offset = di->value;
p->from.sym->type = SDATA;
p->link = datap;
datap = p;
break;
case ADATA:
if(p->from.sym == S) {
diag("DATA without a sym\n%P", p);
break;
}
p->link = datap;
datap = p;
break;
case AGOK:
diag("unknown opcode\n%P", p);
p->pc = pc;
pc++;
break;
case ATEXT:
if(curtext != P) {
histtoauto();
curtext->to.autom = curauto;
curauto = 0;
}
skip = 0;
curtext = p;
autosize = (p->to.offset+3L) & ~3L;
p->to.offset = autosize;
autosize += 4;
s = p->from.sym;
if(s == S) {
diag("TEXT must have a name\n%P", p);
errorexit();
}
if(s->type != 0 && s->type != SXREF) {
if(p->reg & DUPOK) {
skip = 1;
goto casedef;
}
diag("redefinition: %s\n%P", s->name, p);
}
s->type = STEXT;
s->value = pc;
lastp->link = p;
lastp = p;
p->pc = pc;
pc++;
if(textp == P) {
textp = p;
etextp = p;
goto loop;
}
etextp->cond = p;
etextp = p;
break;
case ASUB:
if(p->from.type == D_CONST)
if(p->from.name == D_NONE)
if(p->from.offset < 0) {
p->from.offset = -p->from.offset;
p->as = AADD;
}
goto casedef;
case AADD:
if(p->from.type == D_CONST)
if(p->from.name == D_NONE)
if(p->from.offset < 0) {
p->from.offset = -p->from.offset;
p->as = ASUB;
}
goto casedef;
case AMOVDF:
if(!vfp || p->from.type != D_FCONST)
goto casedef;
p->as = AMOVF;
/* fall through */
case AMOVF:
if(skip)
goto casedef;
if(p->from.type == D_FCONST && chipfloat(p->from.ieee) < 0) {
/* size sb 9 max */
snprint(literal, sizeof literal, "$%lux", ieeedtof(p->from.ieee));
s = lookup(literal, 0);
if(s->type == 0) {
s->type = SBSS;
s->value = 4;
t = prg();
t->as = ADATA;
t->line = p->line;
t->from.type = D_OREG;
t->from.sym = s;
t->from.name = D_EXTERN;
t->reg = 4;
t->to = p->from;
t->link = datap;
datap = t;
}
p->from.type = D_OREG;
p->from.sym = s;
p->from.name = D_EXTERN;
p->from.offset = 0;
}
goto casedef;
case AMOVD:
if(skip)
goto casedef;
if(p->from.type == D_FCONST && chipfloat(p->from.ieee) < 0) {
/* size sb 18 max */
snprint(literal, sizeof literal, "$%lux.%lux",
p->from.ieee->l, p->from.ieee->h);
s = lookup(literal, 0);
if(s->type == 0) {
s->type = SBSS;
s->value = 8;
t = prg();
t->as = ADATA;
t->line = p->line;
t->from.type = D_OREG;
t->from.sym = s;
t->from.name = D_EXTERN;
t->reg = 8;
t->to = p->from;
t->link = datap;
datap = t;
}
p->from.type = D_OREG;
p->from.sym = s;
p->from.name = D_EXTERN;
p->from.offset = 0;
}
goto casedef;
default:
casedef:
if(skip)
nopout(p);
if(p->to.type == D_BRANCH)
p->to.offset += ipc;
lastp->link = p;
lastp = p;
p->pc = pc;
pc++;
break;
}
goto loop;
eof:
diag("truncated object file: %s", pn);
}
Sym*
lookup(char *symb, int v)
{
Sym *s;
char *p;
long h;
int c, l;
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;
while(nhunk < sizeof(Sym))
gethunk();
s = (Sym*)hunk;
nhunk -= sizeof(Sym);
hunk += sizeof(Sym);
s->name = malloc(l);
memmove(s->name, symb, l);
s->link = hash[h];
s->type = 0;
s->version = v;
s->value = 0;
s->sig = 0;
s->dupok = 0;
hash[h] = s;
return s;
}
Prog*
prg(void)
{
Prog *p;
while(nhunk < sizeof(Prog))
gethunk();
p = (Prog*)hunk;
nhunk -= sizeof(Prog);
hunk += sizeof(Prog);
*p = zprg;
return p;
}
void
gethunk(void)
{
char *h;
long nh;
nh = NHUNK;
if(thunk >= 5L*NHUNK) {
nh = 5L*NHUNK;
if(thunk >= 25L*NHUNK)
nh = 25L*NHUNK;
}
h = mysbrk(nh);
if(h == (char*)-1) {
diag("out of memory");
errorexit();
}
hunk = h;
nhunk = nh;
thunk += nh;
}
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->line = p->line;
q->link = datap;
datap = q;
q->as = ADATA;
q->from.type = D_OREG;
q->from.name = D_EXTERN;
q->from.offset = n*4;
q->from.sym = s;
q->reg = 4;
q->to = p->from;
q->to.type = D_CONST;
q = prg();
q->line = p->line;
q->pc = p->pc;
q->link = p->link;
p->link = q;
p = q;
p->as = AMOVW;
p->from.type = D_OREG;
p->from.name = D_EXTERN;
p->from.sym = s;
p->from.offset = n*4 + 4;
p->to.type = D_REG;
p->to.reg = REGTMP;
q = prg();
q->line = p->line;
q->pc = p->pc;
q->link = p->link;
p->link = q;
p = q;
p->as = AADD;
p->from.type = D_CONST;
p->from.offset = 1;
p->to.type = D_REG;
p->to.reg = REGTMP;
q = prg();
q->line = p->line;
q->pc = p->pc;
q->link = p->link;
p->link = q;
p = q;
p->as = AMOVW;
p->from.type = D_REG;
p->from.reg = REGTMP;
p->to.type = D_OREG;
p->to.name = D_EXTERN;
p->to.sym = s;
p->to.offset = n*4 + 4;
n += 2;
continue;
}
}
q = prg();
q->line = 0;
q->link = datap;
datap = q;
q->as = ADATA;
q->from.type = D_OREG;
q->from.name = D_EXTERN;
q->from.sym = s;
q->reg = 4;
q->to.type = D_CONST;
q->to.offset = n;
s->type = SBSS;
s->value = n*4;
}
static int brcond[] = {ABEQ, ABNE, ABCS, ABCC, ABMI, ABPL, ABVS, ABVC, ABHI, ABLS, ABGE, ABLT, ABGT, ABLE};
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->reg = 1;
}
if(p->from.sym == s4) {
ps4 = p;
p->reg = 1;
}
}
}
for(p = firstp; p != P; p = p->link) {
if(p->as == ATEXT) {
if(p->reg & NOPROF) {
for(;;) {
q = p->link;
if(q == P)
break;
if(q->as == ATEXT)
break;
p = q;
}
continue;
}
/*
* BL profin
*/
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 = AB;
q2->to.type = D_BRANCH;
q2->to.sym = p->to.sym;
q2->cond = q->link;
}else
p->link = q;
p = q;
p->as = ABL;
p->to.type = D_BRANCH;
p->cond = ps2;
p->to.sym = s2;
continue;
}
if(p->as == ARET) {
/*
* RET (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;
}
/*
* RET
*/
q = prg();
q->as = ARET;
q->from = p->from;
q->to = p->to;
q->cond = p->cond;
q->link = p->link;
q->reg = p->reg;
p->link = q;
if(p->scond != 14) {
q = prg();
q->as = ABL;
q->from = zprg.from;
q->to = zprg.to;
q->to.type = D_BRANCH;
q->cond = ps4;
q->to.sym = s4;
q->link = p->link;
p->link = q;
p->as = brcond[p->scond^1]; /* complement */
p->scond = 14;
p->from = zprg.from;
p->to = zprg.to;
p->to.type = D_BRANCH;
p->cond = q->link->link; /* successor of RET */
p->to.offset = q->link->link->pc;
p = q->link->link;
} else {
/*
* BL profout
*/
p->as = ABL;
p->from = zprg.from;
p->to = zprg.to;
p->to.type = D_BRANCH;
p->cond = ps4;
p->to.sym = s4;
p->scond = 14;
p = q;
}
continue;
}
}
}
void
nuxiinit(void)
{
int i, c;
for(i=0; i<4; i++) {
c = find1(0x04030201L, i+1);
if(i < 2)
inuxi2[i] = c;
if(i < 1)
inuxi1[i] = c;
inuxi4[i] = c;
fnuxi4[i] = c;
if(debug['d'] == 0){
fnuxi8[i] = c;
fnuxi8[i+4] = c+4;
}
else{
fnuxi8[i] = c+4; /* ms word first, then ls, even in little endian mode */
fnuxi8[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, "\nfnuxi = ");
for(i=0; i<4; i++)
Bprint(&bso, "%d", fnuxi4[i]);
Bprint(&bso, " ");
for(i=0; i<8; i++)
Bprint(&bso, "%d", fnuxi8[i]);
Bprint(&bso, "\n");
}
Bflush(&bso);
}
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;
}
long
ieeedtof(Ieee *ieeep)
{
int exp;
long v;
if(ieeep->h == 0)
return 0;
exp = (ieeep->h>>20) & ((1L<<11)-1L);
exp -= (1L<<10) - 2L;
v = (ieeep->h & 0xfffffL) << 3;
v |= (ieeep->l >> 29) & 0x7L;
if((ieeep->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 |= ieeep->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);
}
void
undefsym(Sym *s)
{
int n;
n = imports;
if(s->value != 0)
diag("value != 0 on SXREF");
if(n >= 1<<Rindex)
diag("import index %d out of range", n);
s->value = n<<Roffset;
s->type = SUNDEF;
imports++;
}
void
zerosig(char *sp)
{
Sym *s;
s = lookup(sp, 0);
s->sig = 0;
}
void
readundefs(char *f, int t)
{
int i, n;
Sym *s;
Biobuf *b;
char *l, buf[256], *fields[64];
if(f == nil)
return;
b = Bopen(f, OREAD);
if(b == nil){
diag("could not open %s: %r", f);
errorexit();
}
while((l = Brdline(b, '\n')) != nil){
n = Blinelen(b);
if(n >= sizeof(buf)){
diag("%s: line too long", f);
errorexit();
}
memmove(buf, l, n);
buf[n-1] = '\0';
n = getfields(buf, fields, nelem(fields), 1, " \t\r\n");
if(n == nelem(fields)){
diag("%s: bad format", f);
errorexit();
}
for(i = 0; i < n; i++) {
s = lookup(fields[i], 0);
s->type = SXREF;
s->subtype = t;
if(t == SIMPORT)
nimports++;
else
nexports++;
}
}
Bterm(b);
}