Tiny Core Linux

General TC => General TC Talk => Topic started by: smultita on August 19, 2010, 10:58:25 AM

Title: exec old binaries depending on libc5
Post by: smultita on August 19, 2010, 10:58:25 AM

I have some old console programs (binaries depending on libc.so.5 and ld-linux.so.1) I would like to run.

I have done this in the past on a Debian Linux version 2.6.11 by just copying the libs (above) to /lib.
However when I test this in Tinycore 3.0 (or Microcore) the programs run, but after a while I get Segmentation Fault. This seems to be caused by the shared memory (used by the programs to communicate between each other) which is corrupted.

Is it anyway possible to run old binaries still depending on libc.so.5 and ld-linux.so.1 on Tinycore,  Microcore or any newer Linux distro ?

Title: Re: exec old binaries depending on libc5
Post by: curaga on August 24, 2010, 09:36:23 AM

They shouldn't have run on 2.x either. They won't run on any modern distro (unless really lucky, I guess), since libc5 depends on a security option being disabled.

You can turn that security feature off at runtime though to try to run them:
http://kernel.xc.net/html/linux-2.6.35/x86/COMPAT_BRK

Title: Re: exec old binaries depending on libc5
Post by: smultita on August 25, 2010, 11:18:51 AM

in TinyCore 3  /proc/sys/kernel/randomize_va_space  is already set to 2  (=off ?) in tinycore 3

The binaries where develop long time ago under Linux kernel 2.0.35 which used libc5
The have been running on 2.4.26 for several years (which used libc6 but libc.so.5 and ld-linux.so.1 was cp to /lib)
 

Title: Re: exec old binaries depending on libc5
Post by: curaga on August 25, 2010, 12:11:49 PM

2 is on, I don't know what would be the off value but guessing 0. Yeah, the Kconfig text is kinda confusing.

Title: Re: exec old binaries depending on libc5
Post by: smultita on August 26, 2010, 03:07:11 AM

Thanks a lot guys

Code: [Select]

echo 0 > /proc/sys/kernel/randomize_va_space
did the job  :D