Implement the asan:stack statement

This statement allows programmers to reserve a memory range for the
stack. This is useful to reserve a memory region which is not attached
to any variable, and:

1. It is a way to safely reserve space on the $0100 page.
2. The --stats/--write-info flags will be able to add up the memory
   space reserved for the stack.
3. Future tooling might be able to use this value as a way to detect
   stack overflows.

Signed-off-by: Miquel Sabaté Solà <mssola@mssola.com>

1 files changed, 2 insertions, 0 deletions

diff --git a/tests/unused.s b/tests/unused.s
index c26ac42..938794d 100644
--- a/tests/unused.s
+++ b/tests/unused.s
@@ -16,3 +16,5 @@ zp_yet     = $04
 lda zp_used
 lda (zp_more), y
 lda #.lobyte(zp_yet)
+
+;;; asan:stack full