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segment register (segment selector)

Submitted by Anonymous
on May 31, 2008 - 12:18am

What I would like to know is :
1) how the value of segment register is filled? by who ?

my understanding is when compile generates the segments for a particular processes, it generates the object code and where some instructon might be loading the value...

actually seg,ent selector points to the gdt.....
how does the compiler know that which value to be put in segment selector so it points to the correct entry in GDT ?

please reply..
thanks.

‹ Expanding the payload of a packet in a kernel module Debian (Etch): modprobe: FATAL : modules.dep No such file or directory ›

which OS?

strcmp
on
May 31, 2008 - 4:42am

which operating system are you talking about? the last operating system where compilers and programs had to deal with multiple segments/selectors was win3.1, i think. in 16 bit times this was necessary; with 32 bit offsets it got possible to address all of a program's memory as one segment.

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