feat(debug): support register-register conditional breakpoints

Assisted-by: MiMo V2.5 Pro

debug/repl.go

@@ -210,14 +210,16 @@ func REPL(s *Session, bm *Breakpoints, codeBase uint64, funcOffset, funcSize, ar
 			}
 			var cond *Condition
 			if len(parts) >= 6 && parts[2] == "if" {
-				val, err := strconv.ParseUint(parts[5], 0, 64)
-				if err != nil {
-					fmt.Printf("invalid condition value: %s\n", parts[5])
-					continue
+				reg := strings.ToLower(parts[3])
+				op := parts[4]
+				operand := parts[5]
+				if val, err := strconv.ParseUint(operand, 0, 64); err == nil {
+					cond = &Condition{Reg: reg, Op: op, Value: val}
+				} else {
+					cond = &Condition{Reg: reg, Op: op, Reg2: strings.ToLower(operand)}
 				}
-				cond = &Condition{Reg: strings.ToLower(parts[3]), Op: parts[4], Value: val}
 			} else if len(parts) >= 4 && parts[2] == "if" {
-				fmt.Println("usage: break <label|addr> if <reg> <op> <value>")
+				fmt.Println("usage: break <label|addr> if <reg> <op> <value|reg>")
 				continue
 			}
 			bp, err := bm.SetWithCond(addr, label, cond)