Hi Everyone,
When I used llvm-objdump to disassemble an ELF armv7 or thumb I have this error
message:
llvm-objdump: warning: invalid instruction encoding
This message appears directly into the output and the output is mostly wrong
(the invalid instruction create a shift in the addresses) :
1a6d: ff 2f e1 08 stmeq r1!, {r0, r1, r2, r3, r4, r5, r6, r7, r8, r9, r10,
r11, sp} ^
1a71: 30 90 e5 00 rsceq r9, r5, r0, lsr r0
1a75: 10 a0 e1 00 rsceq r10, r1, r0, lsl r0
1a79: 00 53 e3 1e cdpne p3, #14, c5, c3, c0, #0
llvm-objdump: warning: invalid instruction encoding
1a7e: 2f 01 01 00 andeq r0, r1, pc, lsr #2
llvm-objdump: warning: invalid instruction encoding
1a83: e3 13 ff 2f svchs #16716771
llvm-objdump: warning: invalid instruction encoding
The binaries I try to read are c++ dynamic libraries for Android.
I have used the following parameters:
-llvm-objcdump mylib.so -d -arch=arm
-llvm-objcdump mylib.so -d -arch=armv7
-llvm-objcdump mylib.so -d -arch=thumb
or with the following triples:
armv7-none-linux-android
thumbv7-none-linux-android
Does anyone know why I have this error? Am I missing some input parameters?
This is strange because it works great on iOS binaries (both thumb or arm).
Greetings,
Johan
What happens if you use the standard bunutils objdump e.g. from macports package arm-elf-binutils (if you're on a Mac)? On Mon, Jun 20, 2016 at 12:45 AM, Johan Wehrli via llvm-dev < llvm-dev at lists.llvm.org> wrote:> Hi Everyone, > > When I used llvm-objdump to disassemble an ELF armv7 or thumb I have this > error message: > > llvm-objdump: warning: invalid instruction encoding > > This message appears directly into the output and the output is mostly > wrong (the invalid instruction create a shift in the addresses) : > > > 1a6d: ff 2f e1 08 stmeq r1!, {r0, r1, r2, r3, r4, r5, r6, > r7, r8, r9, r10, r11, sp} ^ > 1a71: 30 90 e5 00 rsceq r9, r5, r0, lsr r0 > 1a75: 10 a0 e1 00 rsceq r10, r1, r0, lsl r0 > 1a79: 00 53 e3 1e cdpne p3, #14, c5, c3, c0, #0 > llvm-objdump: warning: invalid instruction encoding > 1a7e: 2f 01 01 00 andeq r0, r1, pc, lsr #2 > llvm-objdump: warning: invalid instruction encoding > 1a83: e3 13 ff 2f svchs #16716771 > llvm-objdump: warning: invalid instruction encoding > > The binaries I try to read are c++ dynamic libraries for Android. > > I have used the following parameters: > > -llvm-objcdump mylib.so -d -arch=arm > -llvm-objcdump mylib.so -d -arch=armv7 > -llvm-objcdump mylib.so -d -arch=thumb > > or with the following triples: > > armv7-none-linux-android > thumbv7-none-linux-android > > Does anyone know why I have this error? Am I missing some input parameters? > > This is strange because it works great on iOS binaries (both thumb or arm). > > Greetings, > > Johan > _______________________________________________ > LLVM Developers mailing list > llvm-dev at lists.llvm.org > http://lists.llvm.org/cgi-bin/mailman/listinfo/llvm-dev >-------------- next part -------------- An HTML attachment was scrubbed... URL: <http://lists.llvm.org/pipermail/llvm-dev/attachments/20160620/9c5f3330/attachment.html>
The standard objdump does not recognised the format. It works if I used an arm-linux-androideabi-objdump from the Android ndk but I am using the clang API to read binary inside my soft. This is why I was only working with llvm-objdump.> On 19 Jun 2016, at 15:03, Bruce Hoult <bruce at hoult.org> wrote: > > What happens if you use the standard bunutils objdump e.g. from macports package arm-elf-binutils (if you're on a Mac)? > > > On Mon, Jun 20, 2016 at 12:45 AM, Johan Wehrli via llvm-dev <llvm-dev at lists.llvm.org <mailto:llvm-dev at lists.llvm.org>> wrote: > Hi Everyone, > > When I used llvm-objdump to disassemble an ELF armv7 or thumb I have this error message: > > llvm-objdump: warning: invalid instruction encoding > > This message appears directly into the output and the output is mostly wrong (the invalid instruction create a shift in the addresses) : > > > 1a6d: ff 2f e1 08 stmeq r1!, {r0, r1, r2, r3, r4, r5, r6, r7, r8, r9, r10, r11, sp} ^ > 1a71: 30 90 e5 00 rsceq r9, r5, r0, lsr r0 > 1a75: 10 a0 e1 00 rsceq r10, r1, r0, lsl r0 > 1a79: 00 53 e3 1e cdpne p3, #14, c5, c3, c0, #0 > llvm-objdump: warning: invalid instruction encoding > 1a7e: 2f 01 01 00 andeq r0, r1, pc, lsr #2 > llvm-objdump: warning: invalid instruction encoding > 1a83: e3 13 ff 2f svchs #16716771 > llvm-objdump: warning: invalid instruction encoding > > The binaries I try to read are c++ dynamic libraries for Android. > > I have used the following parameters: > > -llvm-objcdump mylib.so -d -arch=arm > -llvm-objcdump mylib.so -d -arch=armv7 > -llvm-objcdump mylib.so -d -arch=thumb > > or with the following triples: > > armv7-none-linux-android > thumbv7-none-linux-android > > Does anyone know why I have this error? Am I missing some input parameters? > > This is strange because it works great on iOS binaries (both thumb or arm). > > Greetings, > > Johan > _______________________________________________ > LLVM Developers mailing list > llvm-dev at lists.llvm.org <mailto:llvm-dev at lists.llvm.org> > http://lists.llvm.org/cgi-bin/mailman/listinfo/llvm-dev <http://lists.llvm.org/cgi-bin/mailman/listinfo/llvm-dev> >-------------- next part -------------- An HTML attachment was scrubbed... URL: <http://lists.llvm.org/pipermail/llvm-dev/attachments/20160620/2996daca/attachment.html>