* Exception definition is a little more comprehensive
* Add error state exceptions including double fault
* Exception numbers are now roughly in the order of their importance
Signed-off-by: Alek Ratzloff <alekratz@gmail.com>
Lots of null bytes in a row are a common thing, so the instructions
available can't start with a null pair of bytes anymore.
Signed-off-by: Alek Ratzloff <alekratz@gmail.com>
* Call/ret/push/pop are implemented and appear to be working
* Call/ret/push/pop is specified in the 0x2000 block, replacing the
mov instruction
* Mov instruction is now specified in the 0x3000 block
Signed-off-by: Alek Ratzloff <alekratz@gmail.com>
Major changes inlude:
* Bit the bullet and now instructions have their length hard-coded
* Move from_utf8 object parsing to be done by their objects (instead of
a Parser god object)
* A list of AST sections are assembled into an Object using the new
vm::obj::assemble module.
* Changed the object layout some in the spec, and adjusted code to match
this.
Signed-off-by: Alek Ratzloff <alekratz@gmail.com>
Originally, arithmetic instructions were in the form of
REG2 = REG1 (OP) REG2
but then I started storing the result in REG1 (both in implementation,
and later defs of the arth instructions). So I'm updating it to match
what was actually in my head.
Signed-off-by: Alek Ratzloff <alekratz@gmail.com>
