[parisc-linux] libpng test program causes page fault

[Alan Modra]

On Thu, 8 Mar 2001, Matt Taggart wrote:

> I am still having the problem with the new fixed glibc and new compilers. The 
> page fault is different though,

I get:
Testing libpng version 1.0.8
   with zlib   version 1.1.3

 libpng version 1.0.8 - July 24, 2000
   Copyright (c) 1998-2000 Glenn Randers-Pehrson
   Copyright (c) 1996, 1997 Andreas Dilger
   Copyright (c) 1995, 1996 Guy Eric Schalnat, Group 42, Inc.
 library (10008): libpng version 1.0.8 - July 24, 2000 (header)
 pngtest (10008): libpng version 1.0.8 - July 24, 2000 (header)
 sizeof(png_struct)=808, sizeof(png_info)=288
Testing pngtest.png:
[snip]
libpng passes test

> IASQ: 00000616 00000616 IAOQ: 40057e93 40057e97
>  IIR: 48210228    ISR: 00000616  IOR: 401daa1c
> ORIG_R28: faf00001
> 
> The new pngtest is attached.

And the same with your binary (shared libs built from source locally)

ldd pngtest
        libpng.so.2 => /usr/lib/libpng.so.2 (0x40020000)
        libz.so.1 => /usr/lib/libz.so.1 (0x4004f000)
        libm.so.6 => /lib/libm.so.6 (0x4005f000)
        libc.so.6 => /lib/libc.so.6 (0x40091000)
        /lib/ld.so.1 => /lib/ld.so.1 (0x40000000)

Your IOAQ indicates the fault happened in libz.  48210228 occurs in my
libz in __do_global_ctors_aux, so it smells like your libz is bad,
ie. built with bad crt[in].o.

Alan Modra
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