sourceforge patch #423726. He writes:
> you'll find as attachment a little patch which make
> bochs support the double fault. currently, when 2 pages
> fault occur, bochs does not generate a double fault (as
> the Intel documentation says) but do
> generate a other page fault, which make a triple fault,
> and bochs will exit.
>
> this very little patch make bochs support this double
> fault, which is
> used in our OS in order to dynamically increse kernel
> level stacks.
To see the commit logs for this use either cvsweb or
cvs update -r BRANCH-io-cleanup and then 'cvs log' the various files.
In general this provides a generic interface for logging.
logfunctions:: is a class that is inherited by some classes, and also
. allocated as a standalone global called 'genlog'. All logging uses
. one of the ::info(), ::error(), ::ldebug(), ::panic() methods of this
. class through 'BX_INFO(), BX_ERROR(), BX_DEBUG(), BX_PANIC()' macros
. respectively.
.
. An example usage:
. BX_INFO(("Hello, World!\n"));
iofunctions:: is a class that is allocated once by default, and assigned
as the iofunction of each logfunctions instance. It is this class that
maintains the file descriptor and other output related code, at this
point using vfprintf(). At some future point, someone may choose to
write a gui 'console' for bochs to which messages would be redirected
simply by assigning a different iofunction class to the various logfunctions
objects.
More cleanup is coming, but this works for now. If you want to see alot
of debugging output, in main.cc, change onoff[LOGLEV_DEBUG]=0 to =1.
Comments, bugs, flames, to me: todd@fries.net
to plex86 on 5/14/2001 and said that it was okay:
> Yes, thanks to MandrakeSoft, the Elpin VGA BIOS 2.40 was licensed
> for use in _both_ plex86 and bochs. So you can distribute 2.40.
>
> Replace the text in 'bios/VGABIOS-elpin-LICENSE', with the
> same file from the plex86 CVS tree. Substitute bochs wherever
> plex86 occurs.
compile warnings with or without it on Linux, so it seems no longer
necessary. It may have been introduced to cope with the fabs symbol
conflict, which was already removed in rev1.3 of fpu_etc.c.
supported on more than just linux. Also since about half the options
said "Don't use this" I put the more stable/usable options toward the
top, and the rest in a separate table below.
signal. First, selection of the GUI should cause BX_GUI_SIGHANDLER to
be defined in config.h.in. Then, the GUI should define member functions
Bit32u get_sighandler_mask ();
void sighandler (int sig);
The mask function returns a bitfield where one bit corresponds to each
signal. For any signal whose bit is set to 1 in the return value of
get_sighandler_mask, the gui will control that signal. When the signal
arrives, bx_gui.sighandler(sig) will be called by bx_signal_handler,
instead of the default behavior of that signal.
