opinion about fs and gs in linux

[慕冬亮]

Dear all,

When I analyzed one coredump and read some assembly code, I encounter
one specific segment register : gs. I googled it and found the
following links:

[1] http://stackoverflow.com/questions/10810203/what-is-the-fs-gs-register-intended-for

[2] http://reverseengineering.stackexchange.com/questions/2006/how-are-the-segment-registers-fs-gs-cs-ss-ds-es-used-in-linux

[3] http://stackoverflow.com/questions/6611346/how-are-the-fs-gs-registers-used-in-linux-amd64

In IA32 FS is used by Windows and GS by glibc to reference TLS entry.
And in my 32bit linux, I found fs is 0 in my coredump and gs is 0x33.

--
My best regards to you.

     No System Is Safe!
     Dongliang Mu