Microsoft Virtual PC BUG
Posted: Fri Oct 22, 2004 7:06 am
Microsoft Virtual PC ( or should I say Connectix Virtual PC ? 
) doesn't generate BreakPoint interrupt on task switch even if the TSS.T_IO bit is set on task state segment
how did i encounter this bug:
in my operating system, i use this interrupt ( breakpoint interrupt ) and clear "task swithed" flag on cr0 using "clts" to prevent a "No-Fpu" interrupt on an fpu operation instead of doing it right on "No-Fpu" interrupt.
in VMWare it worked fine, but on MS Virtual PC it crashed.
has anybody else encountered this bug?
if so let me know...
) doesn't generate BreakPoint interrupt on task switch even if the TSS.T_IO bit is set on task state segmenthow did i encounter this bug:
in my operating system, i use this interrupt ( breakpoint interrupt ) and clear "task swithed" flag on cr0 using "clts" to prevent a "No-Fpu" interrupt on an fpu operation instead of doing it right on "No-Fpu" interrupt.
in VMWare it worked fine, but on MS Virtual PC it crashed.
has anybody else encountered this bug?
if so let me know...