ldd equivalent on android

Question

I have a libTest.so that does not load on some devices. logcat is absolutely useless. Using arm-linux-androideabi-readelf.exe -d libTest.so I was able to see all required libs that libTest.so needs. I pulled them all in, into the same folder on my local PC.

How can I find out which symbols is missing and in which library? I have only standard set of tools from the NDK (nm, readelf, objdump etc). Which tool and how can I use so that it parses my libTest.so and all dependent libs as well and tells me which symbol prevents my lib from loading on the target device.

/toolchains/llvm/prebuild//bin/-strings | grep ^lib | grep so — yerlilbilgin, Apr 02 '21 at 09:34

score 22 · Answer 1 · 2019-01-21T08:44:36.263

22

If you don't have the NDK try doing:

readelf --dynamic filename | grep NEEDED

to display the dynamic libraries for an elf binary.

edited Jan 21 '19 at 08:44

answered Oct 19 '16 at 11:41

Pavel P · Accepted Answer · 2014-12-27T05:36:43.620

21

Thanks to android developers. My feature request was implemented :) Now we have ndk-depends, a tool that allows to troubleshoot dependencies.

Edit: it doesn't do full symbol resolution though. E.g. if you build against Android-14 and try to use methods that didn't exist in old Androids, then this tool won't list missing symbols. This part was left as a TODO in ndk-depends.

edited Dec 27 '14 at 05:36

answered Oct 05 '13 at 22:40

Pavel P

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unfortunately ndk-depends was removed in ndk r19: https://github.com/android/ndk/wiki/Changelog-r19#announcements – Bruno Alexandre Rosa Mar 16 '23 at 10:17

score 6 · Answer 3 · answered Feb 24 '17 at 22:13

6

At Android terminal try this:
strings /path/to/your/file | grep ^lib Found here: https://forum.xda-developers.com/showthread.php?t=2737126&page=5

answered Feb 24 '17 at 22:13

Maxxproff

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score 0 · Answer 4 · answered Aug 15 '13 at 17:27

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You can do something like:

$ /lib/ld-linux.so.2 --list filename

This is because ldd is just a shell script that works like a wrapper around the dynamic loader. The name of the dynamic loader, i.e., ld-{version}.so might differ.

answered Aug 15 '13 at 17:27

spica

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Android appears to use `/system/bin/linker` and not `/lib/ld-linux.so` . Anyhow I can't get linker to output anything – Dima Tisnek Nov 14 '13 at 18:40
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I just get `Segmentation fault` when invoking `/system/bin/linker` directly, no matter what arguments I use! – markshep Jan 29 '14 at 16:12

ldd equivalent on android

4 Answers4

Linked