Hi Eric, ----- Original Message ----- From: "Eric Auer" <[EMAIL PROTECTED]> To: "Hans" <[EMAIL PROTECTED]>; <freedos-kernel@lists.sourceforge.net> Sent: Sunday, October 26, 2008 7:19 PM Subject: Re: [Freedos-kernel] [Freedos-user] init_device crash/hang
> Quite exotic. How about using a maintained open > source BIOS? I mean okay the Bochs / Qemu / ... > LGPL-ed BIOS is way more than 8 kB, but you can > probably cut and paste parts to pimp your BIOS. > As long as you follow the LGPL, of course... No > real problem, I assume your BIOS works okay :-). mmmm, not yet (see next posting). >> I use OpenWatcom 1.7a. >> >> I had to change DOS.H slightly to force the else prototype >> >> //#if defined(__NT__) || ( defined(__OS2__) && >> (defined(__386__)||defined(__PPC__)) ) >> //_WCRTLINK extern unsigned _dos_allocmem( unsigned __size, void >> **__storage ); >> //#else >> _WCRTLINK extern unsigned _dos_allocmem( unsigned __size, >> unsigned short *__seg ); >> //#endif > > Can you explain this in more detail? Maybe OW 1.7 somehow > failed to realize that your target is compiling for DOS... Not sure, installed 1.7a and executed the build.bat file. This only happens on the ke2008mar8-scr kernel. I also noticed that it won't build correctly without UPX. As a quick hack I removed the UPX arguments from exeflat (in kernel/makefile) which fixed the issue. #..\utils\exeflat kernel.exe kernel.sys 0x60 -S0x10 -S0x8B $(UPXOPT) ..\utils\exeflat kernel.exe kernel.sys 0x60 -S0x10 -S0x8B >> I think this is my mistake, please ignore :-) > > What was it? Stack corruption :-( > >> KERNEL: Calling InitIO...... >> NUL CON PRN AUX LPT LPT LPT COM COM COM COM CLO NUL >> KERNEL: Calling InitPrinters...... >> KERNEL: Calling InitSerialPorts...... >> KERNEL: Calling DOS_PSP...... > > You mean PSPSet... Yes, cut and paste the wrong string to printf. > >> KERNEL: Calling set_DTA...... >> >> Now it seems to get struck in the int 21h/1a handler, >> isn't debugging with printf statements fun ....;-) > > So PSPInit is not reached? The mistake was INT16/01 which didn't set the zero flag. As a result it hanged in the check_handle_break() routine in inithndlr.c. After fixing that I got to the infamous "Bad or missing Command Interpreter" issue.... Regards, Hans. > > Note that DOS_PSP is #defined to 0x60... if you modify > the boot loader or the build batch file to use another > location then you will have to adjust DOS_PSP as well. > > The constant also appears as LOADSEG in the ASM source > of the boot sectors and as command line argument for > exeflat in the build batch file as well as in the > sys sources as load_segment (command line changeable). > > Eric > ------------------------------------------------------------------------- This SF.Net email is sponsored by the Moblin Your Move Developer's challenge Build the coolest Linux based applications with Moblin SDK & win great prizes Grand prize is a trip for two to an Open Source event anywhere in the world http://moblin-contest.org/redirect.php?banner_id=100&url=/ _______________________________________________ Freedos-kernel mailing list Freedos-kernel@lists.sourceforge.net https://lists.sourceforge.net/lists/listinfo/freedos-kernel
