linux/drivers/lguest
Rusty Russell 3c6b5bfa3c Introduce guest mem offset, static link example launcher
In order to avoid problematic special linking of the Launcher, we give
the Host an offset: this means we can use any memory region in the
Launcher as Guest memory rather than insisting on mmap() at 0.

The result is quite pleasing: a number of casts are replaced with
simple additions.

Signed-off-by: Rusty Russell <rusty@rustcorp.com.au>
2007-10-23 15:49:50 +10:00
..
x86 Rename switcher.S to x86/switcher_32.S 2007-10-23 15:49:50 +10:00
core.c Introduce guest mem offset, static link example launcher 2007-10-23 15:49:50 +10:00
hypercalls.c Introduce guest mem offset, static link example launcher 2007-10-23 15:49:50 +10:00
interrupts_and_traps.c Fix lguest page-pinning logic ("lguest: bad stack page 0xc057a000") 2007-08-30 09:58:22 -07:00
io.c Introduce guest mem offset, static link example launcher 2007-10-23 15:49:50 +10:00
Kconfig Lguest currently depends on 32-bit x86, not just x86. 2007-10-23 15:49:48 +10:00
lg.h Introduce guest mem offset, static link example launcher 2007-10-23 15:49:50 +10:00
lguest_bus.c lguest_devices belongs in lguest_bus.c: it's not i386-specific. 2007-10-23 15:49:49 +10:00
lguest_user.c Introduce guest mem offset, static link example launcher 2007-10-23 15:49:50 +10:00
Makefile Rename switcher.S to x86/switcher_32.S 2007-10-23 15:49:50 +10:00
page_tables.c Introduce guest mem offset, static link example launcher 2007-10-23 15:49:50 +10:00
README lguest: documentation I: Preparation 2007-07-26 11:35:16 -07:00
segments.c lguest: Fix Malicious Guest GDT Host Crash 2007-08-09 08:14:56 -07:00

Welcome, friend reader, to lguest.

Lguest is an adventure, with you, the reader, as Hero.  I can't think of many
5000-line projects which offer both such capability and glimpses of future
potential; it is an exciting time to be delving into the source!

But be warned; this is an arduous journey of several hours or more!  And as we
know, all true Heroes are driven by a Noble Goal.  Thus I offer a Beer (or
equivalent) to anyone I meet who has completed this documentation.

So get comfortable and keep your wits about you (both quick and humorous).
Along your way to the Noble Goal, you will also gain masterly insight into
lguest, and hypervisors and x86 virtualization in general.

Our Quest is in seven parts: (best read with C highlighting turned on)

I) Preparation
	- In which our potential hero is flown quickly over the landscape for a
	  taste of its scope.  Suitable for the armchair coders and other such
	  persons of faint constitution.

II) Guest
	- Where we encounter the first tantalising wisps of code, and come to
	  understand the details of the life of a Guest kernel.

III) Drivers
	- Whereby the Guest finds its voice and become useful, and our
	  understanding of the Guest is completed.

IV) Launcher
	- Where we trace back to the creation of the Guest, and thus begin our
	  understanding of the Host.

V) Host
	- Where we master the Host code, through a long and tortuous journey.
	  Indeed, it is here that our hero is tested in the Bit of Despair.

VI) Switcher
	- Where our understanding of the intertwined nature of Guests and Hosts
	  is completed.

VII) Mastery
	- Where our fully fledged hero grapples with the Great Question:
	  "What next?"

make Preparation!
Rusty Russell.