I am learning OS in my Graduation and stuck with the idea of
programing os in assembly level programing in begning then in C .
I am not able to understand how this is achieved ,how C programe
intereacts with assembly level and how the compiler is implemented
before os is written .Because to write a programe in c you have to
have a compiler and to run a compiler u have to have a os .
Please put ligth on this confusion.
you can also mail me on hsaini@acm.org.

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sainiharsimran@yahoo.co.in (Harsimran) said:
>I am learning OS in my Graduation and stuck with the idea of
>programing os in assembly level programing in begning then in C .
> I am not able to understand how this is achieved ,how C programe
>intereacts with assembly level and how the compiler is implemented
>before os is written .Because to write a programe in c you have to
>have a compiler and to run a compiler u have to have a os .

You "bootstrap" the deveopment on another system. So, in the initial
phases you have some other platform on which you write and compile
your to-be OS. It may even be so that the CPU architecture on your
host (programming/compilation) system and target system are different,
in which case you need a cross-compiler.

For example, the first versions of Linux were written and compiled on
a machine running Minix (until Linux matured enough to be able to run
a compiler, and until gcc got ported to Linux).
--
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