About a ELF packing issue

[ImFl0wow]

I am coding a jni dynamic library
It uses a array to save method information to register native method on jvm

JNINativeMethod table[] = {
{"method_name", "method_dec", (void *) &method_ptr}
};

After compiled, it will become "memcopy" like

memcopy (dest,tables_offset,sizeof (dest))

But the offset is in .rcdata
As I packing it, it will be deleted by vmprotect

[Admin]

I don't understand where you use memcopy and what is ".rcdata". Do you have a simple example (EXE+original DLL+VMP files) that shows your problem?

[ImFl0wow]

I don't understand where you use memcopy and what is ".rcdata". Do you have a simple example (EXE+original DLL+VMP files) that shows your problem?

It's a Java application using java8
Install java8 in linux_x86_64

Just use "java -jar obftest.jar" to run the application

If disappear unsatisfied link excepetion,try use "sudo ln -s /usr/lib/libc.so.6 /usr/lib64/libc.so"

The vmprotect project file didn't turn on any protection options, but it runs well before packing.

After packing the x64-linux.so file(didn't turn on any protection options just pack), the output file will occurre a jvm error(SIGSEGV 0xb)

By the way, if you want to test the packed file, just rename x64-linux.vmp.so to x64-linux.so and put the renamed file into the jar file (in the package fl0wowP4rty/%randomname/x64-linux.so)

[ImFl0wow]

I don't understand where you use memcopy and what is ".rcdata". Do you have a simple example (EXE+original DLL+VMP files) that shows your problem?

I tried it using the official vmprotect latest demo version

[Admin]

If disappear unsatisfied link excepetion,try use "sudo ln -s /usr/lib/libc.so.6 /usr/lib64/libc.so"

Only the following symbol link works for my Ubuntu 20.04:
"sudo ln -s /usr/lib/x86-64-linux-gnu/libc.so.6 /usr/lib/libc.so"

[Admin]

Fixed in the 1832 build.