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minimal 8g. can compile

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package main
	func main() {
	}

and not much else.

R=ken
OCL=26943
CL=26943
This commit is contained in:
Russ Cox 2009-03-31 00:22:59 -07:00
parent b87e3e8b7f
commit dc5b4678e2
6 changed files with 1231 additions and 0 deletions
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39
src/cmd/8g/Makefile Normal file
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# Copyright 2009 The Go Authors. All rights reserved.
# Use of this source code is governed by a BSD-style
# license that can be found in the LICENSE file.
include ../../Make.conf
TARG=\
8g
HFILES=\
../gc/go.h\
../8l/8.out.h\
gg.h\
# opt.h\
OFILES=\
../8l/enam.$O\
list.$O\
align.$O\
obj.$O\
gen.$O\
gsubr.$O\
cgen.$O\
# peep.$O\
# reg.$O\
LIB=\
../gc/gc.a$O
$(TARG): $(OFILES) $(LIB)
$(LD) -o $(TARG) -L$(GOROOT)/lib $(OFILES) $(LIB) -lbio -l9 -lm
$(OFILES): $(HFILES)
clean:
rm -f $(OFILES) $(TARG) *.8 enam.c 8.out a.out
install: $(TARG)
cp $(TARG) $(BIN)/$(TARG)

38
src/cmd/8g/align.c Normal file
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// Copyright 2009 The Go Authors. All rights reserved.
// Use of this source code is governed by a BSD-style
// license that can be found in the LICENSE file.
#include "gg.h"
int thechar = '8';
char* thestring = "386";
/*
* go declares several platform-specific type aliases:
* int, uint, float, and uintptr
*/
Typedef typedefs[] =
{
"int", TINT, TINT32,
"uint", TUINT, TUINT32,
"uintptr", TUINTPTR, TUINT32,
"float", TFLOAT, TFLOAT32,
0
};
void
betypeinit(void)
{
maxround = 4;
widthptr = 4;
zprog.link = P;
zprog.as = AGOK;
zprog.from.type = D_NONE;
zprog.from.index = D_NONE;
zprog.from.scale = 0;
zprog.to = zprog.from;
listinit();
}

184
src/cmd/8g/gen.c Normal file
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// Copyright 2009 The Go Authors. All rights reserved.
// Use of this source code is governed by a BSD-style
// license that can be found in the LICENSE file.
#undef EXTERN
#define EXTERN
#include "gg.h"
void
compile(Node *fn)
{
Plist *pl;
Node nod1;
Prog *ptxt;
int32 lno;
Type *t;
Iter save;
if(newproc == N) {
newproc = sysfunc("newproc");
deferproc = sysfunc("deferproc");
deferreturn = sysfunc("deferreturn");
throwindex = sysfunc("throwindex");
throwreturn = sysfunc("throwreturn");
}
if(fn->nbody == N)
return;
// set up domain for labels
labellist = L;
lno = setlineno(fn);
curfn = fn;
dowidth(curfn->type);
if(curfn->type->outnamed) {
// add clearing of the output parameters
t = structfirst(&save, getoutarg(curfn->type));
while(t != T) {
if(t->nname != N)
curfn->nbody = list(nod(OAS, t->nname, N), curfn->nbody);
t = structnext(&save);
}
}
hasdefer = 0;
walk(curfn);
if(nerrors != 0)
goto ret;
allocparams();
continpc = P;
breakpc = P;
pl = newplist();
pl->name = curfn->nname;
pl->locals = autodcl;
nodconst(&nod1, types[TINT32], 0);
ptxt = gins(ATEXT, curfn->nname, &nod1);
afunclit(&ptxt->from);
// ginit();
gen(curfn->enter);
gen(curfn->nbody);
// gclean();
checklabels();
// if(curfn->type->outtuple != 0)
// ginscall(throwreturn, 0);
// if(hasdefer)
// ginscall(deferreturn, 0);
pc->as = ARET; // overwrite AEND
pc->lineno = lineno;
// if(!debug['N'] || debug['R'] || debug['P'])
// regopt(ptxt);
// fill in argument size
ptxt->to.offset2 = rnd(curfn->type->argwid, maxround);
// fill in final stack size
ptxt->to.offset = rnd(stksize+maxarg, maxround);
if(debug['f'])
frame(0);
ret:
lineno = lno;
}
void
clearfat(Node *nl)
{
fatal("clearfat");
}
/*
* generate:
* call f
* proc=0 normal call
* proc=1 goroutine run in new proc
* proc=2 defer call save away stack
*/
void
ginscall(Node *f, int proc)
{
Prog *p;
Node reg, con;
switch(proc) {
default:
fatal("ginscall: bad proc %d", proc);
break;
case 0: // normal call
p = gins(ACALL, N, f);
afunclit(&p->to);
break;
case 1: // call in new proc (go)
case 2: // defered call (defer)
nodreg(&reg, types[TINT32], D_AX);
gins(APUSHL, f, N);
nodconst(&con, types[TINT32], argsize(f->type));
gins(APUSHL, &con, N);
if(proc == 1)
ginscall(newproc, 0);
else
ginscall(deferproc, 0);
gins(APOPL, N, &reg);
gins(APOPL, N, &reg);
break;
}
}
/*
* n is call to interface method.
* generate res = n.
*/
void
cgen_callinter(Node *n, Node *res, int proc)
{
fatal("cgen_call");
}
/*
* generate function call;
* proc=0 normal call
* proc=1 goroutine run in new proc
* proc=2 defer call save away stack
*/
void
cgen_call(Node *n, int proc)
{
fatal("cgen_call");
}
/*
* generate return.
* n->left is assignments to return values.
*/
void
cgen_ret(Node *n)
{
gen(n->left); // copy out args
if(hasdefer)
ginscall(deferreturn, 0);
gins(ARET, N, N);
}
/*
* generate += *= etc.
*/
void
cgen_asop(Node *n)
{
fatal("cgen_asop");
}

140
src/cmd/8g/gg.h Normal file
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// Copyright 2009 The Go Authors. All rights reserved.
// Use of this source code is governed by a BSD-style
// license that can be found in the LICENSE file.
#include <u.h>
#include <libc.h>
#include "../gc/go.h"
#include "../8l/8.out.h"
#ifndef EXTERN
#define EXTERN extern
#endif
typedef struct Addr Addr;
struct Addr
{
int32 offset;
int32 offset2;
double dval;
Prog* branch;
char sval[NSNAME];
Sym* sym;
uchar type;
uchar index;
uchar etype;
uchar scale; /* doubles as width in DATA op */
};
#define A ((Addr*)0)
struct Prog
{
short as; // opcode
uint32 loc; // pc offset in this func
uint32 lineno; // source line that generated this
Addr from; // src address
Addr to; // dst address
Prog* link; // next instruction in this func
void* reg; // pointer to containing Reg struct
};
EXTERN Biobuf* bout;
EXTERN int32 dynloc;
EXTERN uchar reg[D_NONE];
EXTERN int32 pcloc; // instruction counter
EXTERN String emptystring;
extern char* anames[];
EXTERN Hist* hist;
EXTERN Prog zprog;
EXTERN Node* curfn;
EXTERN Node* newproc;
EXTERN Node* deferproc;
EXTERN Node* deferreturn;
EXTERN Node* throwindex;
EXTERN Node* throwreturn;
/*
* gen.c
*/
void compile(Node*);
void proglist(void);
void gen(Node*);
Node* lookdot(Node*, Node*, int);
void cgen_as(Node*, Node*);
void cgen_callmeth(Node*, int);
void cgen_callinter(Node*, Node*, int);
void cgen_proc(Node*, int);
void cgen_callret(Node*, Node*);
void cgen_div(int, Node*, Node*, Node*);
void cgen_bmul(int, Node*, Node*, Node*);
void cgen_shift(int, Node*, Node*, Node*);
void cgen_dcl(Node*);
int needconvert(Type*, Type*);
void genconv(Type*, Type*);
void allocparams(void);
void checklabels();
void ginscall(Node*, int);
/*
* cgen
*/
void agen(Node*, Node*);
void igen(Node*, Node*, Node*);
vlong fieldoffset(Type*, Node*);
void bgen(Node*, int, Prog*);
void sgen(Node*, Node*, int32);
void gmove(Node*, Node*);
Prog* gins(int, Node*, Node*);
int samaddr(Node*, Node*);
void naddr(Node*, Addr*);
void cgen_aret(Node*, Node*);
/*
* gsubr.c
*/
void clearp(Prog*);
void proglist(void);
Prog* gbranch(int, Type*);
Prog* prog(int);
void gaddoffset(Node*);
void gconv(int, int);
int conv2pt(Type*);
vlong convvtox(vlong, int);
void fnparam(Type*, int, int);
Prog* gop(int, Node*, Node*, Node*);
void setconst(Addr*, vlong);
void setaddr(Addr*, Node*);
int optoas(int, Type*);
void ginit(void);
void gclean(void);
void regalloc(Node*, Type*, Node*);
void regfree(Node*);
Node* nodarg(Type*, int);
void nodreg(Node*, Type*, int);
void nodindreg(Node*, Type*, int);
void nodconst(Node*, Type*, vlong);
void gconreg(int, vlong, int);
void buildtxt(void);
Plist* newplist(void);
int isfat(Type*);
void sudoclean(void);
int sudoaddable(Node*, Addr*);
void afunclit(Addr*);
/*
* list.c
*/
int Aconv(Fmt*);
int Dconv(Fmt*);
int Pconv(Fmt*);
int Rconv(Fmt*);
int Yconv(Fmt*);
void listinit(void);
void zaddr(Biobuf*, Addr*, int);

298
src/cmd/8g/list.c Normal file
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// Derived from Inferno utils/8c/list.c
// http://code.google.com/p/inferno-os/source/browse/utils/8c/list.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"
static int sconsize;
void
listinit(void)
{
fmtinstall('A', Aconv); // as
fmtinstall('P', Pconv); // Prog*
fmtinstall('D', Dconv); // Addr*
fmtinstall('R', Rconv); // reg
fmtinstall('Y', Yconv); // sconst
}
int
Pconv(Fmt *fp)
{
char str[STRINGSZ];
Prog *p;
p = va_arg(fp->args, Prog*);
sconsize = 8;
switch(p->as) {
default:
snprint(str, sizeof(str), "%.4ld (%4ld) %-7A %D,%D",
p->loc, p->lineno, p->as, &p->from, &p->to);
break;
case ADATA:
sconsize = p->from.scale;
snprint(str, sizeof(str), "%.4ld (%4ld) %-7A %D/%d,%D",
p->loc, p->lineno, p->as, &p->from, sconsize, &p->to);
break;
case ATEXT:
snprint(str, sizeof(str), "%.4ld (%4ld) %-7A %D,%lD",
p->loc, p->lineno, p->as, &p->from, &p->to);
break;
}
return fmtstrcpy(fp, str);
}
int
Dconv(Fmt *fp)
{
char str[100], s[100];
Addr *a;
int i;
uint32 d1, d2;
a = va_arg(fp->args, Addr*);
i = a->type;
if(i >= D_INDIR) {
if(a->offset)
snprint(str, sizeof(str), "%ld(%R)", a->offset, i-D_INDIR);
else
snprint(str, sizeof(str), "(%R)", i-D_INDIR);
goto brk;
}
switch(i) {
default:
if(a->offset)
snprint(str, sizeof(str), "$%ld,%R", a->offset, i);
else
snprint(str, sizeof(str), "%R", i);
break;
case D_NONE:
str[0] = 0;
break;
case D_BRANCH:
snprint(str, sizeof(str), "%ld", a->branch->loc);
break;
case D_EXTERN:
snprint(str, sizeof(str), "%S+%ld(SB)", a->sym, a->offset);
break;
case D_STATIC:
snprint(str, sizeof(str), "%S<>+%ld(SB)", a->sym, a->offset);
break;
case D_AUTO:
snprint(str, sizeof(str), "%S+%ld(SP)", a->sym, a->offset);
break;
case D_PARAM:
snprint(str, sizeof(str), "%S+%ld(FP)", a->sym, a->offset);
break;
case D_CONST:
if(fp->flags & FmtLong) {
d1 = a->offset;
d2 = a->offset2;
snprint(str, sizeof(str), "$%lud-%lud", (ulong)d1, (ulong)d2);
break;
}
snprint(str, sizeof(str), "$%ld", a->offset);
break;
case D_FCONST:
snprint(str, sizeof(str), "$(%.17e)", a->dval);
break;
case D_SCONST:
snprint(str, sizeof(str), "$\"%Y\"", a->sval);
break;
case D_ADDR:
a->type = a->index;
a->index = D_NONE;
snprint(str, sizeof(str), "$%D", a);
a->index = a->type;
a->type = D_ADDR;
goto conv;
}
brk:
if(a->index != D_NONE) {
snprint(s, sizeof(s), "(%R*%d)", (int)a->index, (int)a->scale);
strcat(str, s);
}
conv:
return fmtstrcpy(fp, str);
}
static char* regstr[] =
{
"AL", /* [D_AL] */
"CL",
"DL",
"BL",
"AH", /* [D_AH] */
"CH",
"DH",
"BH",
"AX", /* [D_AX] */
"CX",
"DX",
"BX",
"SP",
"BP",
"SI",
"DI",
"F0", /* [D_F0] */
"F1",
"F2",
"F3",
"F4",
"F5",
"F6",
"F7",
"CS", /* [D_CS] */
"SS",
"DS",
"ES",
"FS",
"GS",
"GDTR", /* [D_GDTR] */
"IDTR", /* [D_IDTR] */
"LDTR", /* [D_LDTR] */
"MSW", /* [D_MSW] */
"TASK", /* [D_TASK] */
"CR0", /* [D_CR] */
"CR1",
"CR2",
"CR3",
"CR4",
"CR5",
"CR6",
"CR7",
"DR0", /* [D_DR] */
"DR1",
"DR2",
"DR3",
"DR4",
"DR5",
"DR6",
"DR7",
"TR0", /* [D_TR] */
"TR1",
"TR2",
"TR3",
"TR4",
"TR5",
"TR6",
"TR7",
"NONE", /* [D_NONE] */
};
int
Rconv(Fmt *fp)
{
char str[STRINGSZ];
int r;
r = va_arg(fp->args, int);
if(r < 0 || r >= nelem(regstr) || regstr[r] == nil) {
snprint(str, sizeof(str), "BAD_R(%d)", r);
return fmtstrcpy(fp, str);
}
return fmtstrcpy(fp, regstr[r]);
}
int
Aconv(Fmt *fp)
{
int i;
i = va_arg(fp->args, int);
return fmtstrcpy(fp, anames[i]);
}
int
Yconv(Fmt *fp)
{
int i, c;
char str[30], *p, *a;
a = va_arg(fp->args, char*);
p = str;
for(i=0; i<sconsize; i++) {
c = a[i] & 0xff;
if((c >= 'a' && c <= 'z') ||
(c >= 'A' && c <= 'Z') ||
(c >= '0' && c <= '9')) {
*p++ = c;
continue;
}
*p++ = '\\';
switch(c) {
default:
if(c < 040 || c >= 0177)
break; /* not portable */
p[-1] = c;
continue;
case 0:
*p++ = 'z';
continue;
case '\\':
case '"':
*p++ = c;
continue;
case '\n':
*p++ = 'n';
continue;
case '\t':
*p++ = 't';
continue;
}
*p++ = (c>>6) + '0';
*p++ = ((c>>3) & 7) + '0';
*p++ = (c & 7) + '0';
}
*p = 0;
return fmtstrcpy(fp, str);
}

532
src/cmd/8g/obj.c Normal file
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// Derived from Inferno utils/8c/swt.c
// http://code.google.com/p/inferno-os/source/browse/utils/8c/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, ANAME>>8); /* as */
Bputc(b, t); /* type */
Bputc(b, s->sym); /* sym */
for(n=s->opackage; *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, ANAME>>8);
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, AHISTORY>>8);
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, t;
char *n;
t = 0;
if(a->index != D_NONE || a->scale != 0)
t |= T_INDEX;
if(s != 0)
t |= T_SYM;
switch(a->type) {
case D_BRANCH:
a->offset = a->branch->loc;
default:
t |= T_TYPE;
case D_NONE:
if(a->offset != 0)
t |= T_OFFSET;
if(a->offset2 != 0)
t |= T_OFFSET2;
break;
case D_FCONST:
t |= T_FCONST;
break;
case D_SCONST:
t |= T_SCONST;
break;
}
Bputc(b, t);
if(t & T_INDEX) { /* implies index, scale */
Bputc(b, a->index);
Bputc(b, a->scale);
}
if(t & T_OFFSET) { /* implies offset */
l = a->offset;
Bputc(b, l);
Bputc(b, l>>8);
Bputc(b, l>>16);
Bputc(b, l>>24);
}
if(t & T_OFFSET2) { /* implies offset */
l = a->offset2;
Bputc(b, l);
Bputc(b, l>>8);
Bputc(b, l>>16);
Bputc(b, l>>24);
}
if(t & T_SYM) /* implies sym */
Bputc(b, s);
if(t & T_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);
return;
}
if(t & T_SCONST) {
n = a->sval;
for(i=0; i<NSNAME; i++) {
Bputc(b, *n);
n++;
}
return;
}
if(t & T_TYPE)
Bputc(b, a->type);
}
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;
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.type;
if(t == D_ADDR)
t = p->from.index;
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.type;
if(t == D_ADDR)
t = p->to.index;
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->as>>8);
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);
}
}
}
void
datastring(char *s, int len)
{
int w;
Prog *p;
Addr ac, ao;
// string
memset(&ao, 0, sizeof(ao));
ao.type = D_STATIC;
ao.index = D_NONE;
ao.etype = TINT32;
ao.sym = symstringo;
ao.offset = 0; // fill in
// constant
memset(&ac, 0, sizeof(ac));
ac.type = D_CONST;
ac.index = D_NONE;
ac.offset = 0; // fill in
for(w=0; w<len; w+=8) {
p = pc;
gins(ADATA, N, N);
// .stringo<>+oo, [NSNAME], $"xxx"
p->from = ao;
p->from.offset = stringo;
p->from.scale = NSNAME;
if(w+8 > len)
p->from.scale = len-w;
p->to = ac;
p->to.type = D_SCONST;
p->to.offset = len;
memmove(p->to.sval, s+w, p->from.scale);
stringo += p->from.scale;
}
}
void
dumpstrings(void)
{
Pool *l;
Prog *p;
Addr ac, ao;
int32 wi;
if(poolist == nil)
return;
memset(&ac, 0, sizeof(ac));
memset(&ao, 0, sizeof(ao));
// constant
ac.type = D_CONST;
ac.index = D_NONE;
ac.offset = 0; // fill in
// string len+ptr
ao.type = D_STATIC;
ao.index = D_NONE;
ao.etype = TINT32;
ao.sym = symstringo;
ao.offset = 0; // fill in
wi = types[TINT32]->width;
// lay out (count+string)
for(l=poolist; l!=nil; l=l->link) {
p = pc;
gins(ADATA, N, N);
// .stringo<>+xx, wi, $len
stringo = rnd(stringo, wi);
p->from = ao;
p->from.offset = stringo;
p->from.scale = wi;
p->to = ac;
p->to.offset = l->sval->len;
stringo += wi;
datastring(l->sval->s, l->sval->len);
}
}
int
dstringptr(Sym *s, int off, char *str)
{
Prog *p;
off = rnd(off, widthptr);
p = gins(ADATA, N, N);
p->from.type = D_EXTERN;
p->from.index = D_NONE;
p->from.sym = s;
p->from.offset = off;
p->from.scale = widthptr;
p->to.type = D_ADDR;
p->to.index = D_STATIC;
p->to.etype = TINT32;
p->to.sym = symstringo;
p->to.offset = stringo;
off += widthptr;
datastring(str, strlen(str)+1);
return off;
}
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_EXTERN;
p->from.index = D_NONE;
p->from.sym = s;
p->from.offset = off;
p->from.scale = wid;
p->to.type = D_CONST;
p->to.index = D_NONE;
p->to.offset = v;
off += wid;
return off;
}
int
duint32(Sym *s, int off, uint32 v)
{
return duintxx(s, off, v, 4);
}
int
duint16(Sym *s, int off, uint32 v)
{
return duintxx(s, off, v, 2);
}
int
duintptr(Sym *s, int off, uint32 v)
{
return duintxx(s, off, v, 8);
}
int
dsymptr(Sym *s, int off, Sym *x)
{
Prog *p;
off = rnd(off, widthptr);
p = gins(ADATA, N, N);
p->from.type = D_EXTERN;
p->from.index = D_NONE;
p->from.sym = s;
p->from.offset = off;
p->from.scale = widthptr;
p->to.type = D_ADDR;
p->to.index = D_EXTERN;
p->to.sym = x;
p->to.offset = 0;
off += widthptr;
return off;
}
void
genembedtramp(Type *t, Sig *b)
{
Sym *e;
int c, d, o;
Prog *p;
Type *f;
e = lookup(b->name);
for(d=0; d<nelem(dotlist); d++) {
c = adddot1(e, t, d, nil);
if(c == 1)
goto out;
}
fatal("genembedtramp %T.%s", t, b->name);
out:
if(d == 0)
return;
// print("genembedtramp %d\n", d);
// print(" t = %lT\n", t);
// print(" name = %s\n", b->name);
// print(" sym = %S\n", b->sym);
// print(" hash = 0x%ux\n", b->hash);
newplist()->name = newname(b->sym);
//TEXT main·S_test2(SB),7,$0
p = pc;
gins(ATEXT, N, N);
p->from.type = D_EXTERN;
p->from.sym = b->sym;
p->to.type = D_CONST;
p->to.offset = 0;
p->from.scale = 7;
//print("1. %P\n", p);
//MOVL 4(SP), AX
p = pc;
gins(AMOVL, N, N);
p->from.type = D_INDIR+D_SP;
p->from.offset = 4;
p->to.type = D_AX;
//print("2. %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;
//MOVL o(AX), AX
p = pc;
gins(AMOVL, N, N);
p->from.type = D_INDIR+D_AX;
p->from.offset = o;
p->to.type = D_AX;
//print("3. %P\n", p);
o = 0;
}
if(o != 0) {
//ADDL $XX, AX
p = pc;
gins(AADDL, N, N);
p->from.type = D_CONST;
p->from.offset = o;
p->to.type = D_AX;
//print("4. %P\n", p);
}
//MOVL AX, 4(SP)
p = pc;
gins(AMOVL, N, N);
p->from.type = D_AX;
p->to.type = D_INDIR+D_SP;
p->to.offset = 8;
//print("5. %P\n", p);
f = dotlist[0].field;
//JMP main·*Sub_test2(SB)
if(isptr[f->type->etype])
f = f->type;
p = pc;
gins(AJMP, N, N);
p->to.type = D_EXTERN;
p->to.sym = methodsym(lookup(b->name), ptrto(f->type));
//print("6. %P\n", p);
pc->as = ARET; // overwrite AEND
}
void
nopout(Prog *p)
{
p->as = ANOP;
}