wrong ELF class: ELFCLASS32

wilsonsamm · 01-19-2011, 03:34 AM

I've been writing a program and a couple of libraries on a 32-bit computer, but when I moved to my other computer (64-bit) I started getting this message when trying to load a shared object.

Code:

Couldn't open /usr/lib/asmp/z80emu.so:
	/usr/lib/asmp/z80emu.so: wrong ELF class: ELFCLASS32

z80emu.so is the shared object in question.

I suppose ELFCLASS32 means a ELF file on a 32-bit architecture, which suggests that my compiler, gcc, is still producing 32 bit code. What can I do? do I need to specify -march= and so on?

kbp · 01-19-2011, 04:59 AM

More likely that you've compiled your program on the new system and it's now 64bit but you haven't recompiled the .so, try running 'file' on each one

wilsonsamm · 01-19-2011, 06:11 AM

Oh yeah, I got:

Code:

# file /usr/lib/asmp/z80emu.so 
/usr/lib/asmp/z80emu.so: ELF 32-bit LSB shared object, Intel 80386, version 1 (SYSV), dynamically linked, not stripped

I'll recompile now

H_TeXMeX_H · 01-19-2011, 11:34 AM

Note that parts of some emulators are written in 32-bit assembly ... and will only run on 32-bit, if they haven't been ported.