/*parse the response message and manipulate the send message*/
static int handlemessage(struct dhcp_msg*rmsg,struct dhcp_msg*smsg)
{
int i,j,p;
/*find DNS info*/
if(getdns){
p=messagefindoption(rmsg,OPT_DNS_SERVER);
if(p>=0){
for(i=0;i<rmsg->msg_opt[p].opt_dns_server.num_dns;i++)
addaddr(dnsservers,rmsg->msg_opt[p].opt_dns_server.addr[i]);
}
p=messagefindoption(rmsg,OPT_DNS_NAME);
if(p>=0){
for(i=0;i<rmsg->msg_opt[p].opt_dns_name.num_dns;i++)
adddomain(rmsg->msg_opt[p].opt_dns_name.namelist[i]);
}
}
/*find PREFIX info*/
if(getprefix){
p=messagefindoption(rmsg,OPT_IAPD);
if(p>=0)
for(i=0;i<rmsg->msg_opt[p].opt_numopts;i++)
if(rmsg->msg_opt[p].subopt[i].opt_type==OPT_IAPREFIX){
j=addaddr(prefixes,rmsg->msg_opt[p].subopt[i].opt_iaprefix.prefix);
if(j>=0)
prefixlens[j]=rmsg->msg_opt[p].subopt[i].opt_iaprefix.prefixlen;
}
}
/*find IANA info*/
if(getaddress){
p=messagefindoption(rmsg,OPT_IANA);
if(p>=0)
for(i=0;i<rmsg->msg_opt[p].opt_numopts;i++)
if(rmsg->msg_opt[p].subopt[i].opt_type==OPT_IAADDR)
addaddr(addresses,rmsg->msg_opt[p].subopt[i].opt_iaaddress.addr);
}
/*copy server address*/
Memcpy(&dhcpserver,&rmsg->msg_peer.sin6_addr,16);
/*check for rapid commit or type=REPLY; if so: tell caller it can stop now*/
if(rmsg->msg_type==MSG_REPLY)return 0;
if(messagefindoption(rmsg,OPT_RAPIDCOMMIT)>=0)return 0;
/*otherwise we need to continue*/
/*correct message type & id*/
clearrecvfilter();
if(getprefix||getaddress){
addrecvfilter(MSG_REPLY);
smsg->msg_type=MSG_REQUEST;
}else{
addrecvfilter(MSG_REPLY);
smsg->msg_type=MSG_IREQUEST;
}
smsg->msg_id++; /*elapsed time continues to count*/
/*rapid commit is no longer applicable*/
messageremoveoption(smsg,OPT_RAPIDCOMMIT);
/*append server ID*/
p=messagefindoption(rmsg,OPT_SERVERID);
if(p>=0)messageappendopt(smsg,&rmsg->msg_opt[p]);
return 1;
}
void
dynrelocsym(Sym *s)
{
Reloc *r;
Sym *rel;
Sym *got;
if(HEADTYPE == Hwindows) {
Sym *rel, *targ;
rel = lookup(".rel", 0);
if(s == rel)
return;
for(r=s->r; r<s->r+s->nr; r++) {
targ = r->sym;
if(r->sym->plt == -2 && r->sym->got != -2) { // make dynimport JMP table for PE object files.
targ->plt = rel->size;
r->sym = rel;
r->add = targ->plt;
// jmp *addr
if(thechar == '8') {
adduint8(rel, 0xff);
adduint8(rel, 0x25);
addaddr(rel, targ);
adduint8(rel, 0x90);
adduint8(rel, 0x90);
} else {
adduint8(rel, 0xff);
adduint8(rel, 0x24);
adduint8(rel, 0x25);
addaddrplus4(rel, targ, 0);
adduint8(rel, 0x90);
}
} else if(r->sym->plt >= 0) {
r->sym = rel;
r->add = targ->plt;
}
}
return;
}
got = rel = nil;
if(flag_shared) {
rel = lookuprel();
got = lookup(".got", 0);
}
s->rel_ro = 0;
for(r=s->r; r<s->r+s->nr; r++) {
if(r->sym != S && r->sym->type == SDYNIMPORT || r->type >= 256)
adddynrel(s, r);
if(flag_shared && r->sym != S && s->type != SDYNIMPORT && r->type == D_ADDR
&& (s == got || s->type == SDATA || s->type == SGOSTRING || s->type == STYPE || s->type == SRODATA)) {
// Create address based RELATIVE relocation
adddynrela(rel, s, r);
if(s->type < SNOPTRDATA)
s->rel_ro = 1;
}
}
}
void
addstrdata(char *name, char *value)
{
LSym *s, *sp;
char *p;
uchar reachable;
p = smprint("%s.str", name);
sp = linklookup(ctxt, p, 0);
free(p);
addstring(sp, value);
sp->type = SRODATA;
s = linklookup(ctxt, name, 0);
s->size = 0;
s->dupok = 1;
reachable = s->reachable;
addaddr(ctxt, s, sp);
adduint32(ctxt, s, strlen(value));
if(PtrSize == 8)
adduint32(ctxt, s, 0); // round struct to pointer width
// addstring, addaddr, etc., mark the symbols as reachable.
// In this case that is not necessarily true, so stick to what
// we know before entering this function.
s->reachable = reachable;
sp->reachable = reachable;
}
void
elfwritedynentsym(Sym *s, int tag, Sym *t)
{
if(elf64)
adduint64(s, tag);
else
adduint32(s, tag);
addaddr(s, t);
}
void
elfwritedynentsym(LSym *s, int tag, LSym *t)
{
if(elf64)
adduint64(ctxt, s, tag);
else
adduint32(ctxt, s, tag);
addaddr(ctxt, s, t);
}
void
adddynsym(Link *ctxt, LSym *s)
{
LSym *d;
int t;
char *name;
if(s->dynid >= 0)
return;
if(iself) {
s->dynid = nelfsym++;
d = linklookup(ctxt, ".dynsym", 0);
name = s->extname;
adduint32(ctxt, d, addstring(linklookup(ctxt, ".dynstr", 0), name));
/* type */
t = STB_GLOBAL << 4;
if(s->cgoexport && (s->type&SMASK) == STEXT)
t |= STT_FUNC;
else
t |= STT_OBJECT;
adduint8(ctxt, d, t);
/* reserved */
adduint8(ctxt, d, 0);
/* section where symbol is defined */
if(s->type == SDYNIMPORT)
adduint16(ctxt, d, SHN_UNDEF);
else
adduint16(ctxt, d, 1);
/* value */
if(s->type == SDYNIMPORT)
adduint64(ctxt, d, 0);
else
addaddr(ctxt, d, s);
/* size of object */
adduint64(ctxt, d, s->size);
if(!(s->cgoexport & CgoExportDynamic) && s->dynimplib && needlib(s->dynimplib)) {
elfwritedynent(linklookup(ctxt, ".dynamic", 0), DT_NEEDED,
addstring(linklookup(ctxt, ".dynstr", 0), s->dynimplib));
}
} else if(HEADTYPE == Hdarwin) {
diag("adddynsym: missed symbol %s (%s)", s->name, s->extname);
} else if(HEADTYPE == Hwindows) {
// already taken care of
} else {
diag("adddynsym: unsupported binary format");
}
}
void
dynrelocsym(LSym *s)
{
Reloc *r;
if(HEADTYPE == Hwindows) {
LSym *rel, *targ;
rel = linklookup(ctxt, ".rel", 0);
if(s == rel)
return;
for(r=s->r; r<s->r+s->nr; r++) {
targ = r->sym;
if(targ == nil)
continue;
if(!targ->reachable)
diag("internal inconsistency: dynamic symbol %s is not reachable.", targ->name);
if(r->sym->plt == -2 && r->sym->got != -2) { // make dynimport JMP table for PE object files.
targ->plt = rel->size;
r->sym = rel;
r->add = targ->plt;
// jmp *addr
if(thechar == '8') {
adduint8(ctxt, rel, 0xff);
adduint8(ctxt, rel, 0x25);
addaddr(ctxt, rel, targ);
adduint8(ctxt, rel, 0x90);
adduint8(ctxt, rel, 0x90);
} else {
adduint8(ctxt, rel, 0xff);
adduint8(ctxt, rel, 0x24);
adduint8(ctxt, rel, 0x25);
addaddrplus4(ctxt, rel, targ, 0);
adduint8(ctxt, rel, 0x90);
}
} else if(r->sym->plt >= 0) {
r->sym = rel;
r->add = targ->plt;
}
}
return;
}
for(r=s->r; r<s->r+s->nr; r++) {
if(r->sym != S && r->sym->type == SDYNIMPORT || r->type >= 256) {
if(r->sym != S && !r->sym->reachable)
diag("internal inconsistency: dynamic symbol %s is not reachable.", r->sym->name);
adddynrel(s, r);
}
}
}
void
addstrdata(char *name, char *value)
{
Sym *s, *sp;
char *p;
p = smprint("%s.str", name);
sp = lookup(p, 0);
free(p);
addstring(sp, value);
s = lookup(name, 0);
s->dupok = 1;
addaddr(s, sp);
adduint32(s, strlen(value));
if(PtrSize == 8)
adduint32(s, 0); // round struct to pointer width
}
void
dynrelocsym(Sym *s)
{
Reloc *r;
if(HEADTYPE == Hwindows) {
Sym *rel, *targ;
rel = lookup(".rel", 0);
if(s == rel)
return;
for(r=s->r; r<s->r+s->nr; r++) {
targ = r->sym;
if(r->sym->plt == -2 && r->sym->got != -2) { // make dynimport JMP table for PE object files.
targ->plt = rel->size;
r->sym = rel;
r->add = targ->plt;
// jmp *addr
if(thechar == '8') {
adduint8(rel, 0xff);
adduint8(rel, 0x25);
addaddr(rel, targ);
adduint8(rel, 0x90);
adduint8(rel, 0x90);
} else {
adduint8(rel, 0xff);
adduint8(rel, 0x24);
adduint8(rel, 0x25);
addaddrplus4(rel, targ, 0);
adduint8(rel, 0x90);
}
} else if(r->sym->plt >= 0) {
r->sym = rel;
r->add = targ->plt;
}
}
return;
}
for(r=s->r; r<s->r+s->nr; r++)
if(r->sym->type == SDYNIMPORT || r->type >= 256)
adddynrel(s, r);
}
/* read address file */
void
readaddrs(char *file)
{
Biobuf *b;
char *p;
b = Bopen(file, OREAD);
if(b == nil)
return;
while((p = Brdline(b, '\n')) != nil){
p[Blinelen(b)-1] = 0;
if(*p == '#')
continue;
if(*p == '!')
remaddr(p+1);
else
addaddr(p);
}
Bterm(b);
}
void
addstrdata(char *name, char *value)
{
Sym *s, *sp;
char *p;
p = smprint("%s.str", name);
sp = lookup(p, 0);
free(p);
addstring(sp, value);
s = lookup(name, 0);
s->size = 0;
s->dupok = 1;
addaddr(s, sp);
adduint32(s, strlen(value));
if(PtrSize == 8)
adduint32(s, 0); // round struct to pointer width
// in case reachability has already been computed
sp->reachable = s->reachable;
}
void
adddynsym(Sym *s)
{
Sym *d;
int t;
char *name;
if(s->dynid >= 0)
return;
if(iself) {
s->dynid = nelfsym++;
d = lookup(".dynsym", 0);
/* name */
name = s->extname;
adduint32(d, addstring(lookup(".dynstr", 0), name));
/* value */
if(s->type == SDYNIMPORT)
adduint32(d, 0);
else
addaddr(d, s);
/* size */
adduint32(d, 0);
/* type */
t = STB_GLOBAL << 4;
if(s->cgoexport && (s->type&SMASK) == STEXT)
t |= STT_FUNC;
else
t |= STT_OBJECT;
adduint8(d, t);
adduint8(d, 0);
/* shndx */
if(s->type == SDYNIMPORT)
adduint16(d, SHN_UNDEF);
else {
switch(s->type) {
default:
case STEXT:
t = 11;
break;
case SRODATA:
t = 12;
break;
case SDATA:
t = 13;
break;
case SBSS:
t = 14;
break;
}
adduint16(d, t);
}
} else if(HEADTYPE == Hdarwin) {
diag("adddynsym: missed symbol %s (%s)", s->name, s->extname);
} else if(HEADTYPE == Hwindows) {
// already taken care of
} else {
diag("adddynsym: unsupported binary format");
}
}
void
adddynsym(Sym *s)
{
Sym *d, *str;
int t;
char *name;
vlong off;
if(s->dynid >= 0)
return;
if(s->dynimpname == nil)
diag("adddynsym: no dynamic name for %s", s->name);
if(iself) {
s->dynid = nelfsym++;
d = lookup(".dynsym", 0);
/* name */
name = s->dynimpname;
if(name == nil)
name = s->name;
adduint32(d, addstring(lookup(".dynstr", 0), name));
/* value */
if(s->type == SDYNIMPORT)
adduint32(d, 0);
else
addaddr(d, s);
/* size */
adduint32(d, 0);
/* type */
t = STB_GLOBAL << 4;
if(s->dynexport && (s->type&SMASK) == STEXT)
t |= STT_FUNC;
else
t |= STT_OBJECT;
adduint8(d, t);
adduint8(d, 0);
/* shndx */
if(!s->dynexport && s->dynimpname != nil)
adduint16(d, SHN_UNDEF);
else {
switch(s->type) {
default:
case STEXT:
t = 11;
break;
case SRODATA:
t = 12;
break;
case SDATA:
t = 13;
break;
case SBSS:
t = 14;
break;
}
adduint16(d, t);
}
} else if(HEADTYPE == Hdarwin) {
// Mach-O symbol nlist32
d = lookup(".dynsym", 0);
name = s->dynimpname;
if(name == nil)
name = s->name;
if(d->size == 0 && ndynexp > 0) { // pre-allocate for dynexps
symgrow(d, ndynexp*12);
}
if(s->dynid <= -100) { // pre-allocated, see cmd/ld/go.c:^sortdynexp()
s->dynid = -s->dynid-100;
off = s->dynid*12;
} else {
off = d->size;
s->dynid = off/12;
}
// darwin still puts _ prefixes on all C symbols
str = lookup(".dynstr", 0);
setuint32(d, off, str->size);
off += 4;
adduint8(str, '_');
addstring(str, name);
if(s->type == SDYNIMPORT) {
setuint8(d, off, 0x01); // type - N_EXT - external symbol
off++;
setuint8(d, off, 0); // section
off++;
} else {
setuint8(d, off, 0x0f);
off++;
switch(s->type) {
default:
case STEXT:
setuint8(d, off, 1);
break;
case SDATA:
setuint8(d, off, 2);
break;
case SBSS:
setuint8(d, off, 4);
break;
}
off++;
}
setuint16(d, off, 0); // desc
off += 2;
if(s->type == SDYNIMPORT)
setuint32(d, off, 0); // value
else
setaddr(d, off, s);
off += 4;
} else if(HEADTYPE != Hwindows) {
diag("adddynsym: unsupported binary format");
}
}
void
main(int argc, char **argv)
{
String *msg;
String *firstline;
char *listname, *alfile;
Waitmsg *w;
int fd;
char *replytoname = nil;
ARGBEGIN{
case 'r':
replytoname = ARGF();
break;
}ARGEND;
rfork(RFENVG|RFREND);
if(argc < 2)
usage();
alfile = argv[0];
listname = argv[1];
if(replytoname == nil)
replytoname = listname;
readaddrs(alfile);
if(Binit(&in, 0, OREAD) < 0)
sysfatal("opening input: %r");
msg = s_new();
firstline = s_new();
/* discard the 'From ' line */
if(s_read_line(&in, firstline) == nil)
sysfatal("reading input: %r");
/* read up to the first 128k of the message. more is ridiculous.
Not if word documents are distributed. Upped it to 2MB (pb) */
if(s_read(&in, msg, 2*1024*1024) <= 0)
sysfatal("reading input: %r");
/* parse the header */
yyinit(s_to_c(msg), s_len(msg));
yyparse();
/* get the sender */
getaddrs();
if(from == nil)
from = sender;
if(from == nil)
sysfatal("message must contain From: or Sender:");
if(strcmp(listname, s_to_c(from)) == 0)
sysfatal("can't remail messages from myself");
addaddr(s_to_c(from));
/* start the mailer up and return a pipe to it */
fd = startmailer(listname);
/* send message adding our own reply-to and precedence */
printmsg(fd, msg, replytoname, listname);
close(fd);
/* wait for mailer to end */
while(w = wait()){
if(w->msg != nil && w->msg[0])
sysfatal("%s", w->msg);
free(w);
}
/* if the mailbox exists, cat the mail to the end of it */
appendtoarchive(listname, firstline, msg);
exits(0);
}
void
adddynsym(Sym *s)
{
Sym *d, *str;
int t;
char *name;
if(s->dynid >= 0)
return;
if(s->dynimpname == nil)
diag("adddynsym: no dynamic name for %s", s->name);
if(iself) {
s->dynid = nelfsym++;
d = lookup(".dynsym", 0);
name = s->dynimpname;
if(name == nil)
name = s->name;
adduint32(d, addstring(lookup(".dynstr", 0), name));
/* type */
t = STB_GLOBAL << 4;
if(s->dynexport && s->type == STEXT)
t |= STT_FUNC;
else
t |= STT_OBJECT;
adduint8(d, t);
/* reserved */
adduint8(d, 0);
/* section where symbol is defined */
if(!s->dynexport && s->dynimpname != nil)
adduint16(d, SHN_UNDEF);
else {
switch(s->type) {
default:
case STEXT:
t = 11;
break;
case SRODATA:
t = 12;
break;
case SDATA:
t = 13;
break;
case SBSS:
t = 14;
break;
}
adduint16(d, t);
}
/* value */
if(s->type == SDYNIMPORT)
adduint64(d, 0);
else
addaddr(d, s);
/* size of object */
adduint64(d, 0);
if(!s->dynexport && s->dynimplib && needlib(s->dynimplib)) {
elfwritedynent(lookup(".dynamic", 0), DT_NEEDED,
addstring(lookup(".dynstr", 0), s->dynimplib));
}
} else if(HEADTYPE == Hdarwin) {
// Mach-o symbol nlist64
d = lookup(".dynsym", 0);
name = s->dynimpname;
if(name == nil)
name = s->name;
s->dynid = d->size/16;
// darwin still puts _ prefixes on all C symbols
str = lookup(".dynstr", 0);
adduint32(d, str->size);
adduint8(str, '_');
addstring(str, name);
if(s->type == SDYNIMPORT) {
adduint8(d, 0x01); // type - N_EXT - external symbol
adduint8(d, 0); // section
} else {
adduint8(d, 0x0f);
switch(s->type) {
default:
case STEXT:
adduint8(d, 1);
break;
case SDATA:
adduint8(d, 2);
break;
case SBSS:
adduint8(d, 4);
break;
}
}
adduint16(d, 0); // desc
if(s->type == SDYNIMPORT)
adduint64(d, 0); // value
else
addaddr(d, s);
} else if(HEADTYPE != Hwindows) {
diag("adddynsym: unsupported binary format");
}
}
void
adddynsym(Sym *s)
{
Sym *d, *str;
int t;
char *name;
if(s->dynid >= 0)
return;
if(s->dynimpname == nil)
diag("adddynsym: no dynamic name for %s", s->name, *(int32*)0);
if(iself) {
s->dynid = nelfsym++;
d = lookup(".dynsym", 0);
/* name */
name = s->dynimpname;
if(name == nil)
name = s->name;
adduint32(d, addstring(lookup(".dynstr", 0), name));
/* value */
if(s->type == SDYNIMPORT)
adduint32(d, 0);
else
addaddr(d, s);
/* size */
adduint32(d, 0);
/* type */
t = STB_GLOBAL << 4;
if(s->dynexport && s->type == STEXT)
t |= STT_FUNC;
else
t |= STT_OBJECT;
adduint8(d, t);
adduint8(d, 0);
/* shndx */
if(!s->dynexport && s->dynimpname != nil)
adduint16(d, SHN_UNDEF);
else {
switch(s->type) {
default:
case STEXT:
t = 11;
break;
case SRODATA:
t = 12;
break;
case SDATA:
t = 13;
break;
case SBSS:
t = 14;
break;
}
adduint16(d, t);
}
} else if(HEADTYPE == Hdarwin) {
// Mach-O symbol nlist32
d = lookup(".dynsym", 0);
name = s->dynimpname;
if(name == nil)
name = s->name;
s->dynid = d->size/12;
// darwin still puts _ prefixes on all C symbols
str = lookup(".dynstr", 0);
adduint32(d, str->size);
adduint8(str, '_');
addstring(str, name);
adduint8(d, 0x01); // type - N_EXT - external symbol
adduint8(d, 0); // section
adduint16(d, 0); // desc
adduint32(d, 0); // value
} else if(HEADTYPE != Hwindows) {
diag("adddynsym: unsupported binary format");
}
}
void
patch(void)
{
int32 c;
Prog *p, *q;
Sym *s, *gmsym;
int32 vexit;
if(debug['v'])
Bprint(&bso, "%5.2f mkfwd\n", cputime());
Bflush(&bso);
mkfwd();
if(debug['v'])
Bprint(&bso, "%5.2f patch\n", cputime());
Bflush(&bso);
if(flag_shared) {
s = lookup("init_array", 0);
s->type = SINITARR;
s->reachable = 1;
s->hide = 1;
addaddr(s, lookup(INITENTRY, 0));
}
gmsym = lookup("runtime.tlsgm", 0);
if(linkmode != LinkExternal)
gmsym->reachable = 0;
s = lookup("exit", 0);
vexit = s->value;
for(cursym = textp; cursym != nil; cursym = cursym->next)
for(p = cursym->text; p != P; p = p->link) {
if(HEADTYPE == Hwindows) {
// Windows
// Convert
// op n(GS), reg
// to
// MOVL 0x28(GS), reg
// op n(reg), reg
// The purpose of this patch is to fix some accesses
// to extern register variables (TLS) on Windows, as
// a different method is used to access them.
if(p->from.type == D_INDIR+D_GS
&& p->to.type >= D_AX && p->to.type <= D_DI
&& p->from.offset <= 8) {
q = appendp(p);
q->from = p->from;
q->from.type = D_INDIR + p->to.type;
q->to = p->to;
q->as = p->as;
p->as = AMOVQ;
p->from.type = D_INDIR+D_GS;
p->from.offset = 0x28;
}
}
if(HEADTYPE == Hlinux || HEADTYPE == Hfreebsd
|| HEADTYPE == Hopenbsd || HEADTYPE == Hnetbsd
|| HEADTYPE == Hplan9x64 || HEADTYPE == Hdragonfly) {
// ELF uses FS instead of GS.
if(p->from.type == D_INDIR+D_GS)
p->from.type = D_INDIR+D_FS;
if(p->to.type == D_INDIR+D_GS)
p->to.type = D_INDIR+D_FS;
if(p->from.index == D_GS)
p->from.index = D_FS;
if(p->to.index == D_GS)
p->to.index = D_FS;
}
if(!flag_shared) {
// Convert g() or m() accesses of the form
// op n(reg)(GS*1), reg
// to
// op n(GS*1), reg
if(p->from.index == D_FS || p->from.index == D_GS) {
p->from.type = D_INDIR + p->from.index;
p->from.index = D_NONE;
}
// Convert g() or m() accesses of the form
// op reg, n(reg)(GS*1)
// to
// op reg, n(GS*1)
if(p->to.index == D_FS || p->to.index == D_GS) {
p->to.type = D_INDIR + p->to.index;
p->to.index = D_NONE;
}
// Convert get_tls access of the form
// op runtime.tlsgm(SB), reg
// to
// NOP
if(gmsym != S && p->from.sym == gmsym) {
p->as = ANOP;
p->from.type = D_NONE;
p->to.type = D_NONE;
p->from.sym = nil;
p->to.sym = nil;
continue;
}
} else {
// Convert TLS reads of the form
// op n(GS), reg
// to
// MOVQ $runtime.tlsgm(SB), reg
// op n(reg)(GS*1), reg
if((p->from.type == D_INDIR+D_FS || p->from.type == D_INDIR + D_GS) && p->to.type >= D_AX && p->to.type <= D_DI) {
q = appendp(p);
q->to = p->to;
q->as = p->as;
q->from.type = D_INDIR+p->to.type;
q->from.index = p->from.type - D_INDIR;
q->from.scale = 1;
q->from.offset = p->from.offset;
p->as = AMOVQ;
p->from.type = D_EXTERN;
p->from.sym = gmsym;
p->from.offset = 0;
}
}
if(p->as == ACALL || (p->as == AJMP && p->to.type != D_BRANCH) || (p->as == ARET && p->to.sym != nil)) {
s = p->to.sym;
if(s) {
if(debug['c'])
Bprint(&bso, "%s calls %s\n", TNAME, s->name);
if((s->type&SMASK) != STEXT) {
/* diag prints TNAME first */
diag("undefined: %s", s->name);
s->type = STEXT;
s->value = vexit;
continue; // avoid more error messages
}
if(s->text == nil)
continue;
p->to.type = D_BRANCH;
p->to.offset = s->text->pc;
p->pcond = s->text;
continue;
}
}
if(p->to.type != D_BRANCH)
continue;
c = p->to.offset;
for(q = cursym->text; q != P;) {
if(c == q->pc)
break;
if(q->forwd != P && c >= q->forwd->pc)
q = q->forwd;
else
q = q->link;
}
if(q == P) {
diag("branch out of range in %s (%#ux)\n%P [%s]",
TNAME, c, p, p->to.sym ? p->to.sym->name : "<nil>");
p->to.type = D_NONE;
}
p->pcond = q;
}
for(cursym = textp; cursym != nil; cursym = cursym->next)
for(p = cursym->text; p != P; p = p->link) {
p->mark = 0; /* initialization for follow */
if(p->pcond != P) {
p->pcond = brloop(p->pcond);
if(p->pcond != P)
if(p->to.type == D_BRANCH)
p->to.offset = p->pcond->pc;
}
}
}