feat: overhaul userspace heap and virtual memory

kernel/src/Hal/IDT.cpp

@@ -13,6 +13,7 @@
 #include <Memory/PageFrameAllocator.hpp>
 #include <Sched/Scheduler.hpp>
 #include <Sched/CrashReport.hpp>
+#include <Api/Heap.hpp>
 #include <Hal/SmpBoot.hpp>
 #include <Timekeeping/ApicTimer.hpp>
 
@@ -201,10 +202,12 @@ namespace Hal {
         // pushes past the mapped stack and kernel accesses to not-yet-grown
         // user stack buffers passed into syscalls.
         if ((errorCode & 1) == 0 && cpu != nullptr && cpu->currentSlot >= 0
-            && Sched::GetCurrentPid() >= 0
-            && Sched::TryGrowUserStack(cr2)) {
-            if (fromUser) asm volatile("swapgs");
-            return;
+            && Sched::GetCurrentPid() >= 0) {
+            if (montauk::abi::TryHandleAnonymousPageFault(cr2, errorCode) ||
+                Sched::TryGrowUserStack(cr2)) {
+                if (fromUser) asm volatile("swapgs");
+                return;
+            }
         }
 
         // Not a growable fault. Hand the RAW frame (error code at offset 0)