On Sat, Dec 17, 2011 at 3:50 PM, Julian Pidancet <[email protected]> wrote: > On Sat, Dec 17, 2011 at 3:38 PM, Kevin O'Connor <[email protected]> wrote: >> On Fri, Dec 16, 2011 at 02:15:07PM +0000, Julian Pidancet wrote: >>> The real-mode emulator that Windows 7 uses to execute the vga bios rom >>> becomes very confused when the code tries to dereference the stack >>> pointer instead of using the frame pointer, leading to corruption of >>> parameters passed on the stack from one function to another. >>> >>> Signed-off-by: Julian Pidancet <[email protected]> >> >> Wow - I can only imagine how hard it was to find that. >> >> I'm okay with turning off omit-frame-pointer for the vga bios. >> However, I'd prefer not to turn it off for the main seabios build. >> Does the emulator also try to emulate parts of the BIOS, which would >> make that a problem? >> > > Besides the functions which are common to both the BIOS and the VGA > ROM ( src/output.c and src/util.c), it doesn't seem to make any > particular problem with the rest of the BIOS. >
The VGA ROM and the BIOS currently share the same CFLAGS. Due to the way the Makefile is written at the moment, I can hardly see how to modify it to compile both binaries with different CFLAGS without making a mess in the Makefile. Do you have any recommendations ? -- Julian _______________________________________________ SeaBIOS mailing list [email protected] http://www.seabios.org/mailman/listinfo/seabios
