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Re: BFD 2.16.1 "assertion failure" and "internal error"

From: Nick Clifton
Subject: Re: BFD 2.16.1 "assertion failure" and "internal error"
Date: Wed, 13 Jul 2005 10:47:24 +0100
User-agent: Mozilla Thunderbird 1.0 (X11/20041206)

Hi Dan,

The standard ALPHA_MAGIC number is 0x183.

However, the DEC C and C++ compilers can generate compressed binary files, whose magic number will be 0x188.

Ah ha!

An alternative would be to use the 'objZ -u' command to uncompress the .o file. Presumably, this could be done automatically from within the BFD library.

Hmm - this might be tricky. What if the objZ program is not available ? What if I am running on a non-DEC ALPHA host and I want to examine/use object files created in this compressed format ? Is the compression scheme used by DEC documented ? Is there source code available for it ?

I think that the simplest change we could make would be to have BFD detect object files with a magic number of 0x188 and then have it issue an error message along the lines of "please decompress this file before passing it to BFD". What do you think ?


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