Hello everybody, > I am wondering if I can use BCEL to modify J2ME MIDlets since any bytecode > modification in J2ME would require running a J2ME verifier on the modified > bytecodes. My understanding is that J2ME preverification involves > computing > StackMap attributes. Does BCEL automatically take care of recomputing and > updating StackMap attribute in the case of J2ME MIDlets ?
I�m working on that way, modifing J2ME MIDlets bytecode. I could modify MIDlets bytecode but when I tried to run it on any emulator or on a mobile device errors appeared. The problem is that the class files need a StackMap for the KVM classfile verification. This new attribute (StackMap) is defined by "KVM Specification" but not by "The Java Virtual Machine Specification". BCEL includes a class for managing StackMaps "org.apache.bcel.classfile.StackMap", then the only thing to do is update that attribute to its new value. I�m working around this but, so far, I�m not success. > If not, is anyone aware of J2ME MIDlet verifier similar to JustIce for J2SE? BCEL has also a verifier. I tried it but it only checks your bytecode and notices to you if it passes the checking. Thanks, Jose -- To unsubscribe, e-mail: <mailto:[EMAIL PROTECTED]> For additional commands, e-mail: <mailto:[EMAIL PROTECTED]>
