Compiling Linux hsdis (uintptr_t, dlsym undefined; wrong ELF class)

[Edward Lee]

I was trying to compile hsdis on Linux 2.6.18-53.el5 x86_64 and ran
into a few issues.

The first couple was fixed by a patch [1] to address various things
being undefined:

hsdis.c:50: error: expected specifier-qualifier-list before 'uintptr_t'
hsdis-demo.c:(.text+0x96): undefined reference to `dlsym'
hsdis-demo.c:(.text+0xcc): undefined reference to `dlopen'
hsdis-demo.c:(.text+0x1fa): undefined reference to `dlerror'

The next issue was that the disassembler couldn't use hsdis-i386.so. I
found out with +WizardMode that the problem was "wrong ELF class:
ELFCLASS64". So I had to recompile both binutils and hsdis with the
-m32 option.

bin/linux/hsdis-i386.so: ELF 64-bit LSB shared object, Intel 80386,
version 1 (SYSV), not stripped
.. instead of ..
bin/linux/hsdis-i386.so: ELF 32-bit LSB shared object, Intel 80386,
version 1 (SYSV), not stripped

I've updated the original patch [1] to have changes to Makefile and
README about using -m32.

Ed

[1] http://groups.google.com/group/jvm-languages/msg/4b7b6f19ab719cb7
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