Module sunrise_bootstrap::bootstrap_stack

Bootstrap stack

A bootstrap stack is structured as follow :

j--------------------j  < 0xaaaa0000 = BootstrapStack.stack_address
|                    |
|                    |
|     PAGE GUARD     |
|                    |
|                    |
j--------------------j
|                    |
|                    |
|        AAA         |
|        |||         |
|                    |
j--------------------j
|                    |
|       STACK        |
|                    |
| j----------------j |
| |  poison value  | |
j-j----------------j-j < 0xaaaaffff
     No Page Guard

Since the stack is several pages long, we must ensure the stack respects some alignment in order to be able to find its bottom from any page.

Must be consistent with KernelStack, as kernel considers it's already running on a KernelStack.

Structs

BootstrapStack

A structure representing a kernel stack

Constants

STACK_ALIGNMENT	The alignment of the stack.
STACK_SIZE	The size of a kernel stack in pages, not accounting for the page guard
STACK_SIZE_WITH_GUARD	The size of a kernel stack in pages, with the page guard.
STACK_SIZE_WITH_GUARD_IN_BYTES	The size of the kernel stack, with the page guard, as a byte count instead of a page count. Used to calculate alignment.