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Editorial Team
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Asked: 2026-05-18T05:22:18+00:00

I have a system fsimage.so that requires mkdirp, which just happens to live in

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I have a system “fsimage.so” that requires mkdirp, which just happens to live in libgen.so. But fsimage.so does not know this. For example:

# ldd /usr/lib/python2.4/vendor-packages/fsimage.so
    libfsimage.so.1.0 =>     /usr/lib/libfsimage.so.1.0
    libxml2.so.2 =>  /lib/libxml2.so.2
    libgcc_s.so.1 =>         /usr/sfw/lib/libgcc_s.so.1
    libpthread.so.1 =>       /lib/libpthread.so.1
    libz.so.1 =>     /lib/libz.so.1
    libm.so.2 =>     /lib/libm.so.2
    libsocket.so.1 =>        /lib/libsocket.so.1
    libnsl.so.1 =>   /lib/libnsl.so.1
    libc.so.1 =>     /lib/libc.so.1
    libmp.so.2 =>    /lib/libmp.so.2
    libmd.so.1 =>    /lib/libmd.so.1

# ./test
Traceback (most recent call last):
  File "./test", line 26, in ?
    import fsimage
ImportError: ld.so.1: isapython2.4: fatal: relocation error: file /usr/lib/python2.4/vendor-packages/fsimage.so: symbol mkdirp: referenced symbol not found

# LD_PRELOAD=/usr/lib/libgen.so ./test
Usage: ./test

Naturally, if I had the sources etc, I could simply link it again, and add “-lgen”, and it will add libgen.so as a dependency.

But as an exercise in hackery, say I do not have any sources, and simply wanted to add that fsimage.so needs to also load libgen.so. Using elfedit/objcopy etc, is this not possible? I don’t suppose I can use “ld” to use .so as input, and write a new .so with extra library?

# elfdump /usr/lib/python2.4/vendor-packages/fsimage.so|grep NEEDED
   [0]  NEEDED            0x5187              libfsimage.so.1.0
   [1]  NEEDED            0x5152              libxml2.so.2
   [2]  NEEDED            0x5171              libgcc_s.so.1

First attempt at stackoverflow, go easy on me 🙂

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1 Answer

  1. Editorial Team

    Thank you “Employed Russian”, you gave me the information needed to search deeper. Solaris already ships with “elfedit”, so if others wants to know, these are the instructions

    # elfedit libfsimage.so.1.0.0 libfsimage.so.1.0.0-new
> dyn:value DT_NEEDED
 index  tag                value
   [0]  NEEDED            0x4f81              libpthread.so.1
   [1]  NEEDED            0x4fac              libxml2.so.2
   [2]  NEEDED            0x4fc2              libgcc_s.so.1
> dyn:value -add -s DT_NEEDED libscf.so
 index  tag                value
  [35]  NEEDED            0x500d              libscf.so
> dyn:value DT_NEEDED
 index  tag                value
   [0]  NEEDED            0x4f81              libpthread.so.1
   [1]  NEEDED            0x4fac              libxml2.so.2
   [2]  NEEDED            0x4fc2              libgcc_s.so.1
  [35]  NEEDED            0x500d              libscf.so
> :write
> :quit

# ldd libfsimage.so.1.0.0-new
    libpthread.so.1 =>       /lib/libpthread.so.1
    libxml2.so.2 =>  /lib/libxml2.so.2
    libgcc_s.so.1 =>         /usr/sfw/lib/libgcc_s.so.1
    libscf.so =>     /lib/libscf.so
    libz.so.1 =>     /lib/libz.so.1
    libm.so.2 =>     /lib/libm.so.2
    libsocket.so.1 =>        /lib/libsocket.so.1
    libnsl.so.1 =>   /lib/libnsl.so.1
    libc.so.1 =>     /lib/libc.so.1
    libuutil.so.1 =>         /lib/libuutil.so.1
    libgen.so.1 =>   /lib/libgen.so.1
    libnvpair.so.1 =>        /lib/libnvpair.so.1
    libsmbios.so.1 =>        /usr/lib/libsmbios.so.1
    libmp.so.2 =>    /lib/libmp.so.2
    libmd.so.1 =>    /lib/libmd.so.1
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