hi everyone!
short question: if i include an assembler instruction like the following
__asm("movl %0, %%cr5" : : "r"(0x123));
or
__asm("movl %0, %%cr6" : : "r"(0x123));
in a c-program, i do not get any errors when compiling on a x86(i386) cpu. the
binary codes of the generated statements also differ from
__asm("movl %0, %%cr3" : : "r"(0x123));
(their third hex-numbers are different - what makes sense)... the thing i
don't understand is: are there registers cr5-cr20 (starting at cr-something
near 20, i start getting errors that there is no such register).
Is that a bug caused by the multi-platform capability of gcc or are there such
registers on i386 that i am not aware of (e.g. the intel manual does not name
them!!)
The thing is: i am modifying a virtual machine and need new control
registers... in case these control registers registers really don't exist but
GCC generates useful binary-code, this would be just way cool :-)
hope someone can answer this for me - thanks and greetings,
Clemens
