示例#1
0
文件: main.go 项目: NickDaison/e8vm
func wrapMain(funcs []*PkgSym) *Func {
	ret := NewFunc() // the main func

	// clear r0 for safety
	ret.AddInst(inst.Reg(arch8.XOR, 0, 0, 0, 0, 0))

	for _, f := range funcs {
		ret.AddInst(inst.Jmp(arch8.JAL, 0))
		ret.AddLink(FillLink, f)
	}

	ret.AddInst(inst.Sys(arch8.HALT, 0))

	return ret
}
示例#2
0
func resolveInstJmp(p lex8.Logger, ops []*lex8.Token) (*inst, bool) {
	op0 := ops[0]
	opName := op0.Lit
	var op uint32

	// op sym
	switch opName {
	case "j":
		op = arch8.J
	case "jal":
		op = arch8.JAL
	default:
		return nil, false
	}

	var pack, sym string
	var fill int
	var symTok *lex8.Token

	if argCount(p, ops, 1) {
		symTok = ops[1]
		if checkLabel(p, ops[1]) {
			sym = ops[1].Lit
			fill = fillLabel
		} else {
			pack, sym = parseSym(p, ops[1])
			fill = fillLink
		}
	}

	ret := new(inst)
	ret.inst = asminst.Jmp(op, 0)
	ret.pkg = pack
	ret.sym = sym
	ret.fill = fill
	ret.symTok = symTok

	return ret, true
}
示例#3
0
文件: asm.go 项目: NickDaison/e8vm
func (_s) j(im int32) uint32   { return S.Jmp(A.J, im) }
示例#4
0
文件: asm.go 项目: NickDaison/e8vm
func (_s) jal(im int32) uint32 { return S.Jmp(A.JAL, im) }