Exemplo n.º 1
0
func outgcode(a int, g1 *obj.Addr, reg int, g2, g3 *obj.Addr) {
	var p *obj.Prog
	var pl *obj.Plist

	if asm.Pass == 1 {
		goto out
	}

	p = asm.Ctxt.NewProg()
	p.As = int16(a)
	p.Lineno = stmtline
	if nosched != 0 {
		p.Mark |= ppc64.NOSCHED
	}
	p.From = *g1
	p.Reg = int16(reg)
	p.From3 = *g2
	p.To = *g3
	p.Pc = int64(asm.PC)

	if lastpc == nil {
		pl = obj.Linknewplist(asm.Ctxt)
		pl.Firstpc = p
	} else {
		lastpc.Link = p
	}
	lastpc = p

out:
	if a != obj.AGLOBL && a != obj.ADATA {
		asm.PC++
	}
}
Exemplo n.º 2
0
Arquivo: lex.go Projeto: Ericean/go
func outcode(a int, g2 *Addr2) {
	var p *obj.Prog
	var pl *obj.Plist

	if asm.Pass == 1 {
		goto out
	}

	p = new(obj.Prog)
	*p = obj.Prog{}
	p.Ctxt = asm.Ctxt
	p.As = int16(a)
	p.Lineno = stmtline
	p.From = g2.from
	p.To = g2.to
	p.Pc = int64(asm.PC)

	if lastpc == nil {
		pl = obj.Linknewplist(asm.Ctxt)
		pl.Firstpc = p
	} else {

		lastpc.Link = p
	}
	lastpc = p

out:
	if a != obj.AGLOBL && a != obj.ADATA {
		asm.PC++
	}
}
Exemplo n.º 3
0
func outcode(a int, g1 *obj.Addr, reg int, g2 *obj.Addr) {
	var p *obj.Prog
	var pl *obj.Plist

	if asm.Pass == 1 {
		goto out
	}

	if g1.Scale != 0 {
		if reg != 0 || g2.Scale != 0 {
			yyerror("bad addressing modes")
		}
		reg = int(g1.Scale)
	} else if g2.Scale != 0 {
		if reg != 0 {
			yyerror("bad addressing modes")
		}
		reg = int(g2.Scale)
	}

	p = asm.Ctxt.NewProg()
	p.As = int16(a)
	p.Lineno = stmtline
	if nosched != 0 {
		p.Mark |= ppc64.NOSCHED
	}
	p.From = *g1
	p.Reg = int16(reg)
	p.To = *g2
	p.Pc = int64(asm.PC)

	if lastpc == nil {
		pl = obj.Linknewplist(asm.Ctxt)
		pl.Firstpc = p
	} else {
		lastpc.Link = p
	}
	lastpc = p

out:
	if a != obj.AGLOBL && a != obj.ADATA {
		asm.PC++
	}
}
Exemplo n.º 4
0
Arquivo: lex.go Projeto: Ericean/go
func outcode(a, scond int32, g1 *obj.Addr, reg int32, g2 *obj.Addr) {
	var p *obj.Prog
	var pl *obj.Plist

	/* hack to make B.NE etc. work: turn it into the corresponding conditional */
	if a == arm.AB {
		a = int32(bcode[(scond^arm.C_SCOND_XOR)&0xf])
		scond = (scond &^ 0xf) | Always
	}

	if asm.Pass == 1 {
		goto out
	}

	p = new(obj.Prog)
	*p = obj.Prog{}
	p.Ctxt = asm.Ctxt
	p.As = int16(a)
	p.Lineno = stmtline
	p.Scond = uint8(scond)
	p.From = *g1
	p.Reg = int16(reg)
	p.To = *g2
	p.Pc = int64(asm.PC)

	if lastpc == nil {
		pl = obj.Linknewplist(asm.Ctxt)
		pl.Firstpc = p
	} else {
		lastpc.Link = p
	}
	lastpc = p

out:
	if a != obj.AGLOBL && a != obj.ADATA {
		asm.PC++
	}
}
Exemplo n.º 5
0
Arquivo: pgen.go Projeto: danny8002/go
func compile(fn *Node) {
	if Newproc == nil {
		Newproc = Sysfunc("newproc")
		Deferproc = Sysfunc("deferproc")
		Deferreturn = Sysfunc("deferreturn")
		Panicindex = Sysfunc("panicindex")
		panicslice = Sysfunc("panicslice")
		throwreturn = Sysfunc("throwreturn")
	}

	lno := setlineno(fn)

	Curfn = fn
	dowidth(Curfn.Type)

	var oldstksize int64
	var nod1 Node
	var ptxt *obj.Prog
	var pl *obj.Plist
	var p *obj.Prog
	var n *Node
	var nam *Node
	var gcargs *Sym
	var gclocals *Sym
	if fn.Nbody == nil {
		if pure_go != 0 || strings.HasPrefix(fn.Func.Nname.Sym.Name, "init.") {
			Yyerror("missing function body for %q", fn.Func.Nname.Sym.Name)
			goto ret
		}

		if Debug['A'] != 0 {
			goto ret
		}
		emitptrargsmap()
		goto ret
	}

	saveerrors()

	// set up domain for labels
	clearlabels()

	if Curfn.Type.Outnamed {
		// add clearing of the output parameters
		var save Iter
		t := Structfirst(&save, Getoutarg(Curfn.Type))

		for t != nil {
			if t.Nname != nil {
				n = Nod(OAS, t.Nname, nil)
				typecheck(&n, Etop)
				Curfn.Nbody = concat(list1(n), Curfn.Nbody)
			}

			t = structnext(&save)
		}
	}

	order(Curfn)
	if nerrors != 0 {
		goto ret
	}

	hasdefer = false
	walk(Curfn)
	if nerrors != 0 {
		goto ret
	}
	if instrumenting {
		instrument(Curfn)
	}
	if nerrors != 0 {
		goto ret
	}

	continpc = nil
	breakpc = nil

	pl = newplist()
	pl.Name = Linksym(Curfn.Func.Nname.Sym)

	setlineno(Curfn)

	Nodconst(&nod1, Types[TINT32], 0)
	nam = Curfn.Func.Nname
	if isblank(nam) {
		nam = nil
	}
	ptxt = Thearch.Gins(obj.ATEXT, nam, &nod1)
	Afunclit(&ptxt.From, Curfn.Func.Nname)
	ptxt.From3 = new(obj.Addr)
	if fn.Func.Dupok {
		ptxt.From3.Offset |= obj.DUPOK
	}
	if fn.Func.Wrapper {
		ptxt.From3.Offset |= obj.WRAPPER
	}
	if fn.Func.Needctxt {
		ptxt.From3.Offset |= obj.NEEDCTXT
	}
	if fn.Func.Nosplit {
		ptxt.From3.Offset |= obj.NOSPLIT
	}
	if fn.Func.Systemstack {
		ptxt.From.Sym.Cfunc = 1
	}

	// Clumsy but important.
	// See test/recover.go for test cases and src/reflect/value.go
	// for the actual functions being considered.
	if myimportpath != "" && myimportpath == "reflect" {
		if Curfn.Func.Nname.Sym.Name == "callReflect" || Curfn.Func.Nname.Sym.Name == "callMethod" {
			ptxt.From3.Offset |= obj.WRAPPER
		}
	}

	ginit()

	gcargs = makefuncdatasym("gcargs·%d", obj.FUNCDATA_ArgsPointerMaps)
	gclocals = makefuncdatasym("gclocals·%d", obj.FUNCDATA_LocalsPointerMaps)

	for _, t := range Curfn.Func.Fieldtrack {
		gtrack(tracksym(t))
	}

	for l := fn.Func.Dcl; l != nil; l = l.Next {
		n = l.N
		if n.Op != ONAME { // might be OTYPE or OLITERAL
			continue
		}
		switch n.Class {
		case PAUTO, PPARAM, PPARAMOUT:
			Nodconst(&nod1, Types[TUINTPTR], l.N.Type.Width)
			p = Thearch.Gins(obj.ATYPE, l.N, &nod1)
			p.From.Gotype = Linksym(ngotype(l.N))
		}
	}

	Genlist(Curfn.Func.Enter)
	Genlist(Curfn.Nbody)
	gclean()
	checklabels()
	if nerrors != 0 {
		goto ret
	}
	if Curfn.Func.Endlineno != 0 {
		lineno = Curfn.Func.Endlineno
	}

	if Curfn.Type.Outtuple != 0 {
		Ginscall(throwreturn, 0)
	}

	ginit()

	// TODO: Determine when the final cgen_ret can be omitted. Perhaps always?
	cgen_ret(nil)

	if hasdefer {
		// deferreturn pretends to have one uintptr argument.
		// Reserve space for it so stack scanner is happy.
		if Maxarg < int64(Widthptr) {
			Maxarg = int64(Widthptr)
		}
	}

	gclean()
	if nerrors != 0 {
		goto ret
	}

	Pc.As = obj.ARET // overwrite AEND
	Pc.Lineno = lineno

	fixjmp(ptxt)
	if Debug['N'] == 0 || Debug['R'] != 0 || Debug['P'] != 0 {
		regopt(ptxt)
		nilopt(ptxt)
	}

	Thearch.Expandchecks(ptxt)

	oldstksize = Stksize
	allocauto(ptxt)

	if false {
		fmt.Printf("allocauto: %d to %d\n", oldstksize, int64(Stksize))
	}

	setlineno(Curfn)
	if int64(Stksize)+Maxarg > 1<<31 {
		Yyerror("stack frame too large (>2GB)")
		goto ret
	}

	// Emit garbage collection symbols.
	liveness(Curfn, ptxt, gcargs, gclocals)

	gcsymdup(gcargs)
	gcsymdup(gclocals)

	Thearch.Defframe(ptxt)

	if Debug['f'] != 0 {
		frame(0)
	}

	// Remove leftover instrumentation from the instruction stream.
	removevardef(ptxt)

ret:
	lineno = lno
}