Fix ARMv7 dynamic binary errors

[offlinemark]

When a dynamic binary is run on my machine, mcore doesn't even reach main, but errors a message to stderr.

[offlinemark]

once all these are merged, this should be fixed ^

[offlinemark]

But it appears I still have an issue executing dynamic arm binaries that use my system ld.so, and not one i compiled for debugging :/. going to rename this issue to make it more specific

[offlinemark]

Bounty

[catenacyber]

@Mossberg do you have binaries to test ? was this fixed by #514 ?

[offlinemark]

thanks for checking in on this!

the below binary is a hello world arm dynamic binary compiled from

#include <stdio.h>
int main(int argc, const char *argv[])
{
    puts("Hello, world!");
    return 0;
}

arm-linux-gnueabi-gcc helloworld.c  -o hw.arm.dyn2

i am now able to get it to successfully run in manticore 0.1.9 using this cmd

[N] (tempenv-3eb6291213cd3) mark ubuntu /m/h/c/m/e/linux (master) ❯ manticore hw.arm.dyn2 --env LD_LIBRARY_PATH=/usr/arm-linux-gnueabi/lib
2018-06-07 14:46:32,125: [85553] m.manticore:INFO: Loading program hw.arm.dyn2
2018-06-07 14:47:33,049: [85553] m.manticore:INFO: Generated testcase No. 0 - Program finished with exit status: 0
2018-06-07 14:47:33,056: [85553] m.manticore:INFO: Results in /mnt/hgfs/code/manticore/examples/linux/mcore_nbjIDh
2018-06-07 14:47:33,056: [85553] m.manticore:INFO: Total time: 60.1371490955
[I] (tempenv-3eb6291213cd3) mark ubuntu /m/h/c/m/e/linux (master) ❯ cat mcore_nbjIDh/*.stdout
Hello, world!

on my system (ubuntu 16.04) that env variable is necessary for the arm ld.so to find the arm libc

it's not fast, but at least it works, i think we can close this issue now!

hw.arm.dyn2.zip

[catenacyber]

@Mossberg did you have to use a new capstone after capstone-engine/capstone#1163 ?

[offlinemark]

No, I was using capstone 3.0.5rc2...so I'm not totally sure what changed so this is fixed now.

…

On Jun 7, 2018, at 3:04 PM, Catena cyber ***@***.***> wrote: @Mossberg <https://github.com/mossberg> did you have to use a new capstone after capstone-engine/capstone#1163 <capstone-engine/capstone#1163> ? — You are receiving this because you were mentioned. Reply to this email directly, view it on GitHub <#131 (comment)>, or mute the thread <https://github.com/notifications/unsubscribe-auth/ACWmG9A0khD7TyWQk1YIm3YcTWK2KEyrks5t6XktgaJpZM4M72-Z>.

[catenacyber]

Ok your ld.so must not use arm instruction ldrd with addressing mode 3 :-)

[offlinemark]

what happens for you when you run the commands above on 0.1.9?

[catenacyber]

Can you supply me the contents of your /usr/arm-linux-gnueabi/libdirectory ?

[offlinemark]

lib.zip

[catenacyber]

So, it works for me the same, I get to hello world :-)