llvm dev - Jun 2012 - [LLVMdev] MC disassembler for ARM

Hi,

I'm considering to use MC disassembler for ARM target in a binary
translation project. However after trying some ARM binary and I find that
there are a lot of instructions that the disassembler  fails to to decoding.

Could anyone give me some information about the maturity of ARM
disassembler?

Thanks!
David
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On Jun 5, 2012, at 7:44 PM, Fan Dawei <fandawei.s at gmail.com> wrote:
> Hi,
> 
> I'm considering to use MC disassembler for ARM target in a binary
translation project. However after trying some ARM binary and I find that there
are a lot of instructions that the disassembler  fails to to decoding.
> 
> Could anyone give me some information about the maturity of ARM
disassembler?
It's production quality. We're not aware of any instructions that it
fails to decode. Please provide examples / file bugs.

Evan
> 
> Thanks!
> David
> _______________________________________________
> LLVM Developers mailing list
> LLVMdev at cs.uiuc.edu         http://llvm.cs.uiuc.edu
> http://lists.cs.uiuc.edu/mailman/listinfo/llvmdev

Hi Evan,

Thanks for the information!

I've try to use llvm-objdump to disassemble some ARM binary, such as
busybox in android.

./llvm-objdump -arch=arm -d busybox

There are many instructions cannot decode,

:./llvm-objdump: warning: invalid instruction encoding

Did I use llvm-objdump in a correct way?

I think that one possible reason is that llvm-objdump encounter pc relative
data. I'll figure out if this is the reason.

Thanks,
David



On Wed, Jun 6, 2012 at 1:36 PM, Evan Cheng <evan.cheng at apple.com>
wrote:
>
> On Jun 5, 2012, at 7:44 PM, Fan Dawei <fandawei.s at gmail.com>
wrote:
>
> > Hi,
> >
> > I'm considering to use MC disassembler for ARM target in a binary
> translation project. However after trying some ARM binary and I find that
> there are a lot of instructions that the disassembler  fails to to
decoding.
> >
> > Could anyone give me some information about the maturity of ARM
> disassembler?
>
> It's production quality. We're not aware of any instructions that
it fails
> to decode. Please provide examples / file bugs.
>
> Evan
>
> >
> > Thanks!
> > David
> > _______________________________________________
> > LLVM Developers mailing list
> > LLVMdev at cs.uiuc.edu         http://llvm.cs.uiuc.edu
> > http://lists.cs.uiuc.edu/mailman/listinfo/llvmdev
>
>
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