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Re: GCC and 16-bit mode for x86 processor when writing boot code.

From: "Jan Beulich" <jbeulich at novell dot com>
To: "Stephen (SWCOE) Smith" <Stephen dot Smith at honeywell dot com>
Cc: <binutils at sourceware dot org>
Date: Tue, 27 Feb 2007 08:12:31 +0000
Subject: Re: GCC and 16-bit mode for x86 processor when writing boot code.
References: <45E31B7E.1070704@avtrex.com> <EF244E26469B2C42B2B72AC465843D6B044FBED8@AZ18EV808.global.ds.honeywell.com>

>>> "Smith, Stephen (SWCOE)" <Stephen.Smith@honeywell.com> 26.02.07 23:27 >>>
>I am writing some boot code for an x86 processor.  I know that binutils
>assumes 32-bit mode and doesn't have anything analogous to code16. 

It does: .code16

>What is the normal way of handling the 16bit mode until you've run
>enough code to switch to 32-bit flat mode?  Any document I can look at?

See Linux, Xen and perhaps many other sources for examples.

Jan

References:
- Re: Binutils 2.17 fails `make check` on mipsel-linux-gnu
  - From: David Daney
- GCC and 16-bit mode for x86 processor when writing boot code.
  - From: Smith, Stephen \(SWCOE\)

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