// Derived from Inferno utils/5c/swt.c
// http://code.google.com/p/inferno-os/source/browse/utils/5c/swt.c
//
// Copyright © 1994-1999 Lucent Technologies Inc. All rights reserved.
// Portions Copyright © 1995-1997 C H Forsyth (forsyth@terzarima.net)
// Portions Copyright © 1997-1999 Vita Nuova Limited
// Portions Copyright © 2000-2007 Vita Nuova Holdings Limited (www.vitanuova.com)
// Portions Copyright © 2004,2006 Bruce Ellis
// Portions Copyright © 2005-2007 C H Forsyth (forsyth@terzarima.net)
// Revisions Copyright © 2000-2007 Lucent Technologies Inc. and others
// Portions Copyright © 2009 The Go Authors. All rights reserved.
//
// Permission is hereby granted, free of charge, to any person obtaining a copy
// of this software and associated documentation files (the "Software"), to deal
// in the Software without restriction, including without limitation the rights
// to use, copy, modify, merge, publish, distribute, sublicense, and/or sell
// copies of the Software, and to permit persons to whom the Software is
// furnished to do so, subject to the following conditions:
//
// The above copyright notice and this permission notice shall be included in
// all copies or substantial portions of the Software.
//
// THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR
// IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
// FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL THE
// AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER
// LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM,
// OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN
// THE SOFTWARE.
#include "gg.h"
void
zname(Biobuf *b, Sym *s, int t)
{
char *n;
Bputc(b, ANAME); /* as */
Bputc(b, t); /* type */
Bputc(b, s->sym); /* sym */
for(n=s->package; *n; n++)
Bputc(b, *n);
Bputdot(b);
for(n=s->name; *n; n++)
Bputc(b, *n);
Bputc(b, 0);
}
void
zfile(Biobuf *b, char *p, int n)
{
Bputc(b, ANAME);
Bputc(b, D_FILE);
Bputc(b, 1);
Bputc(b, '<');
Bwrite(b, p, n);
Bputc(b, 0);
}
void
zhist(Biobuf *b, int line, vlong offset)
{
Addr a;
Bputc(b, AHISTORY);
Bputc(b, C_SCOND_NONE);
Bputc(b, NREG);
Bputc(b, line);
Bputc(b, line>>8);
Bputc(b, line>>16);
Bputc(b, line>>24);
zaddr(b, &zprog.from, 0);
a = zprog.to;
if(offset != 0) {
a.offset = offset;
a.type = D_CONST;
}
zaddr(b, &a, 0);
}
void
zaddr(Biobuf *b, Addr *a, int s)
{
int32 l;
uint64 e;
int i;
char *n;
switch(a->type) {
case D_STATIC:
case D_AUTO:
case D_EXTERN:
case D_PARAM:
// TODO(kaib): remove once everything seems to work
fatal("We should no longer generate these as types");
default:
Bputc(b, a->type);
Bputc(b, a->reg);
Bputc(b, s);
Bputc(b, a->name);
}
switch(a->type) {
default:
print("unknown type %d in zaddr\n", a->type);
case D_NONE:
case D_REG:
case D_FREG:
case D_PSR:
break;
case D_CONST2:
l = a->offset2;
Bputc(b, l);
Bputc(b, l>>8);
Bputc(b, l>>16);
Bputc(b, l>>24); // fall through
case D_OREG:
case D_CONST:
case D_SHIFT:
case D_STATIC:
case D_AUTO:
case D_EXTERN:
case D_PARAM:
l = a->offset;
Bputc(b, l);
Bputc(b, l>>8);
Bputc(b, l>>16);
Bputc(b, l>>24);
break;
case D_BRANCH:
if(a->branch == nil)
fatal("unpatched branch");
a->offset = a->branch->loc;
l = a->offset;
Bputc(b, l);
Bputc(b, l>>8);
Bputc(b, l>>16);
Bputc(b, l>>24);
break;
case D_SCONST:
n = a->sval;
for(i=0; i<NSNAME; i++) {
Bputc(b, *n);
n++;
}
break;
case D_REGREG:
Bputc(b, a->offset);
break;
case D_FCONST:
ieeedtod(&e, a->dval);
l = e;
Bputc(b, l);
Bputc(b, l>>8);
Bputc(b, l>>16);
Bputc(b, l>>24);
l = e >> 32;
Bputc(b, l);
Bputc(b, l>>8);
Bputc(b, l>>16);
Bputc(b, l>>24);
break;
}
}
void
dumpfuncs(void)
{
Plist *pl;
int sf, st, t, sym;
struct { Sym *sym; short type; } h[NSYM];
Sym *s;
Prog *p;
for(sym=0; sym<NSYM; sym++) {
h[sym].sym = S;
h[sym].type = 0;
}
sym = 1;
// fix up pc
pcloc = 0;
for(pl=plist; pl!=nil; pl=pl->link) {
for(p=pl->firstpc; p!=P; p=p->link) {
p->loc = pcloc;
if(p->as != ADATA && p->as != AGLOBL)
pcloc++;
}
}
// put out functions
for(pl=plist; pl!=nil; pl=pl->link) {
if(debug['S']) {
s = S;
if(pl->name != N)
s = pl->name->sym;
print("\n--- prog list \"%S\" ---\n", s);
for(p=pl->firstpc; p!=P; p=p->link)
print("%P\n", p);
}
for(p=pl->firstpc; p!=P; p=p->link) {
jackpot:
sf = 0;
s = p->from.sym;
while(s != S) {
sf = s->sym;
if(sf < 0 || sf >= NSYM)
sf = 0;
t = p->from.name;
if(t == D_ADDR)
t = p->from.name;
if(h[sf].type == t)
if(h[sf].sym == s)
break;
s->sym = sym;
zname(bout, s, t);
h[sym].sym = s;
h[sym].type = t;
sf = sym;
sym++;
if(sym >= NSYM)
sym = 1;
break;
}
st = 0;
s = p->to.sym;
while(s != S) {
st = s->sym;
if(st < 0 || st >= NSYM)
st = 0;
t = p->to.name;
if(t == D_ADDR)
t = p->to.name;
if(h[st].type == t)
if(h[st].sym == s)
break;
s->sym = sym;
zname(bout, s, t);
h[sym].sym = s;
h[sym].type = t;
st = sym;
sym++;
if(sym >= NSYM)
sym = 1;
if(st == sf)
goto jackpot;
break;
}
Bputc(bout, p->as);
Bputc(bout, p->scond);
Bputc(bout, p->reg);
Bputc(bout, p->lineno);
Bputc(bout, p->lineno>>8);
Bputc(bout, p->lineno>>16);
Bputc(bout, p->lineno>>24);
zaddr(bout, &p->from, sf);
zaddr(bout, &p->to, st);
}
}
}
/* deferred DATA output */
static Prog *strdat;
static Prog *estrdat;
static int gflag;
static Prog *savepc;
static void
data(void)
{
gflag = debug['g'];
debug['g'] = 0;
if(estrdat == nil) {
strdat = mal(sizeof(*pc));
clearp(strdat);
estrdat = strdat;
}
if(savepc)
fatal("data phase error");
savepc = pc;
pc = estrdat;
}
static void
text(void)
{
if(!savepc)
fatal("text phase error");
debug['g'] = gflag;
estrdat = pc;
pc = savepc;
savepc = nil;
}
void
dumpdata(void)
{
Prog *p;
if(estrdat == nil)
return;
*pc = *strdat;
if(gflag)
for(p=pc; p!=estrdat; p=p->link)
print("%P\n", p);
pc = estrdat;
}
/*
* make a refer to the data s, s+len
* emitting DATA if needed.
*/
void
datastring(char *s, int len, Addr *a)
{
int w;
Prog *p;
Addr ac, ao;
static int gen;
struct {
Strlit lit;
char buf[100];
} tmp;
// string
memset(&ao, 0, sizeof(ao));
ao.type = D_OREG;
ao.name = D_STATIC;
ao.etype = TINT32;
ao.offset = 0; // fill in
ao.reg = NREG;
// constant
memset(&ac, 0, sizeof(ac));
ac.type = D_CONST;
ac.name = D_NONE;
ac.offset = 0; // fill in
ac.reg = NREG;
// huge strings are made static to avoid long names.
if(len > 100) {
snprint(namebuf, sizeof(namebuf), ".string.%d", gen++);
ao.sym = lookup(namebuf);
ao.name = D_STATIC;
} else {
if(len > 0 && s[len-1] == '\0')
len--;
tmp.lit.len = len;
memmove(tmp.lit.s, s, len);
tmp.lit.s[len] = '\0';
len++;
snprint(namebuf, sizeof(namebuf), "\"%Z\"", &tmp.lit);
ao.sym = pkglookup(namebuf, "string");
ao.name = D_EXTERN;
}
*a = ao;
// only generate data the first time.
if(ao.sym->flags & SymUniq)
return;
ao.sym->flags |= SymUniq;
data();
for(w=0; w<len; w+=8) {
p = pc;
gins(ADATA, N, N);
// DATA s+w, [NSNAME], $"xxx"
p->from = ao;
p->from.offset = w;
p->reg = NSNAME;
if(w+8 > len)
p->reg = len-w;
p->to = ac;
p->to.type = D_SCONST;
p->to.offset = len;
memmove(p->to.sval, s+w, p->reg);
}
p = pc;
ggloblsym(ao.sym, len, ao.name == D_EXTERN);
if(ao.name == D_STATIC)
p->from.name = D_STATIC;
text();
}
/*
* make a refer to the string sval,
* emitting DATA if needed.
*/
void
datagostring(Strlit *sval, Addr *a)
{
Prog *p;
Addr ac, ao, ap;
int32 wi, wp;
static int gen;
memset(&ac, 0, sizeof(ac));
memset(&ao, 0, sizeof(ao));
memset(&ap, 0, sizeof(ap));
// constant
ac.type = D_CONST;
ac.name = D_NONE;
ac.offset = 0; // fill in
ac.reg = NREG;
// string len+ptr
ao.type = D_OREG;
ao.name = D_STATIC; // fill in
ao.etype = TINT32;
ao.sym = nil; // fill in
ao.reg = NREG;
// $string len+ptr
datastring(sval->s, sval->len, &ap);
ap.type = D_CONST;
ap.etype = TINT32;
wi = types[TUINT32]->width;
wp = types[tptr]->width;
if(ap.name == D_STATIC) {
// huge strings are made static to avoid long names
snprint(namebuf, sizeof(namebuf), ".gostring.%d", ++gen);
ao.sym = lookup(namebuf);
ao.name = D_STATIC;
} else {
// small strings get named by their contents,
// so that multiple modules using the same string
// can share it.
snprint(namebuf, sizeof(namebuf), "\"%Z\"", sval);
ao.sym = pkglookup(namebuf, "go.string");
ao.name = D_EXTERN;
}
*a = ao;
if(ao.sym->flags & SymUniq)
return;
ao.sym->flags |= SymUniq;
data();
// DATA gostring, wp, $cstring
p = pc;
gins(ADATA, N, N);
p->from = ao;
p->reg = wp;
p->to = ap;
// DATA gostring+wp, wi, $len
p = pc;
gins(ADATA, N, N);
p->from = ao;
p->from.offset = wp;
p->reg = wi;
p->to = ac;
p->to.offset = sval->len;
p = pc;
ggloblsym(ao.sym, types[TSTRING]->width, ao.name == D_EXTERN);
if(ao.name == D_STATIC)
p->from.name = D_STATIC;
text();
}
void
gdata(Node *nam, Node *nr, int wid)
{
Prog *p;
vlong v;
if(wid == 8 && is64(nr->type)) {
v = mpgetfix(nr->val.u.xval);
p = gins(ADATA, nam, nodintconst(v));
p->reg = 4;
p = gins(ADATA, nam, nodintconst(v>>32));
p->reg = 4;
p->from.offset += 4;
return;
}
p = gins(ADATA, nam, nr);
p->reg = wid;
}
void
gdatastring(Node *nam, Strlit *sval)
{
Prog *p;
Node nod1;
p = gins(ADATA, nam, N);
datastring(sval->s, sval->len, &p->to);
p->reg = types[tptr]->width;
p->to.type = D_CONST;
p->to.etype = TINT32;
//print("%P\n", p);
nodconst(&nod1, types[TINT32], sval->len);
p = gins(ADATA, nam, &nod1);
p->reg = types[TINT32]->width;
p->from.offset += types[tptr]->width;
}
int
dstringptr(Sym *s, int off, char *str)
{
Prog *p;
off = rnd(off, widthptr);
p = gins(ADATA, N, N);
p->from.type = D_OREG;
p->from.name = D_EXTERN;
p->from.sym = s;
p->from.offset = off;
p->reg = widthptr;
datastring(str, strlen(str)+1, &p->to);
p->to.type = D_CONST;
p->to.etype = TINT32;
off += widthptr;
return off;
}
int
dgostrlitptr(Sym *s, int off, Strlit *lit)
{
Prog *p;
if(lit == nil)
return duintptr(s, off, 0);
off = rnd(off, widthptr);
p = gins(ADATA, N, N);
p->from.type = D_OREG;
p->from.name = D_EXTERN;
p->from.sym = s;
p->from.offset = off;
p->reg = widthptr;
datagostring(lit, &p->to);
p->to.type = D_CONST;
p->to.etype = TINT32;
off += widthptr;
return off;
}
int
dgostringptr(Sym *s, int off, char *str)
{
int n;
Strlit *lit;
if(str == nil)
return duintptr(s, off, 0);
n = strlen(str);
lit = mal(sizeof *lit + n);
strcpy(lit->s, str);
lit->len = n;
return dgostrlitptr(s, off, lit);
}
int
duintxx(Sym *s, int off, uint64 v, int wid)
{
Prog *p;
off = rnd(off, wid);
p = gins(ADATA, N, N);
p->from.type = D_OREG;
p->from.name = D_EXTERN;
p->from.sym = s;
p->from.offset = off;
p->reg = wid;
p->to.type = D_CONST;
p->to.name = D_NONE;
p->to.offset = v;
off += wid;
return off;
}
int
dsymptr(Sym *s, int off, Sym *x, int xoff)
{
Prog *p;
off = rnd(off, widthptr);
p = gins(ADATA, N, N);
p->from.type = D_OREG;
p->from.name = D_EXTERN;
p->from.sym = s;
p->from.offset = off;
p->reg = widthptr;
p->to.type = D_CONST;
p->to.name = D_EXTERN;
p->to.sym = x;
p->to.offset = xoff;
off += widthptr;
return off;
}
void
genembedtramp(Type *rcvr, Type *method, Sym *newnam)
{
// TODO(kaib): re-implement genembedtramp
genwrapper(rcvr, method, newnam);
/*
Sym *e;
int c, d, o;
Prog *p;
Type *f;
e = method->sym;
for(d=0; d<nelem(dotlist); d++) {
c = adddot1(e, rcvr, d, nil);
if(c == 1)
goto out;
}
fatal("genembedtramp %T.%S", rcvr, method->sym);
out:
newplist()->name = newname(newnam);
//TEXT main·S_test2(SB),7,$0
p = pc;
gins(ATEXT, N, N);
p->from.type = D_OREG;
p->from.name = D_EXTERN;
p->from.sym = newnam;
p->to.type = D_CONST2;
p->reg = 7;
p->to.offset2 = 0;
p->to.reg = NREG;
//print("1. %P\n", p);
o = 0;
for(c=d-1; c>=0; c--) {
f = dotlist[c].field;
o += f->width;
if(!isptr[f->type->etype])
continue;
//MOVW o(R0), R0
p = pc;
gins(AMOVW, N, N);
p->from.type = D_OREG;
p->from.reg = REGARG;
p->from.offset = o;
p->to.type = D_REG;
p->to.reg = REGARG;
//print("2. %P\n", p);
o = 0;
}
if(o != 0) {
//MOVW $XX(R0), R0
p = pc;
gins(AMOVW, N, N);
p->from.type = D_CONST;
p->from.reg = REGARG;
p->from.offset = o;
p->to.type = D_REG;
p->to.reg = REGARG;
//print("3. %P\n", p);
}
f = dotlist[0].field;
//B main·*Sub_test2(SB)
if(isptr[f->type->etype])
f = f->type;
p = pc;
gins(AB, N, N);
p->to.type = D_OREG;
p->to.reg = NREG;
p->to.name = D_EXTERN;
p->to.sym = methodsym(method->sym, ptrto(f->type));
//print("4. %P\n", p);
pc->as = ARET; // overwrite AEND
*/
}
void
nopout(Prog *p)
{
p->as = ANOP;
}
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