kernel: lots of tweaks and improvements, WIP: ASN, FileMgr support for OpenHeFS.

Signed-off-by: Amlal El Mahrouss <amlal@nekernel.org>

1 files changed, 77 insertions, 0 deletions

diff --git a/src/kernel/HALKit/AMD64/CxxAbi.cpp b/src/kernel/HALKit/AMD64/CxxAbi.cpp
new file mode 100644
index 00000000..f0f18266
--- /dev/null
+++ b/src/kernel/HALKit/AMD64/CxxAbi.cpp
@@ -0,0 +1,77 @@
+// Copyright 2024-2025, Amlal El Mahrouss (amlal@nekernel.org)
+// Licensed under the Apache License, Version 2.0 (see LICENSE file)
+// Official repository: https://github.com/nekernel-org/nekernel
+
+#include <KernelKit/DebugOutput.h>
+#include <KernelKit/KPC.h>
+#include <KernelKit/UserProcessScheduler.h>
+#include <NeKit/CxxAbi.h>
+
+atexit_func_entry_t __atexit_funcs[kAtExitMacDestructors];
+
+uarch_t __atexit_func_count;
+
+/// @brief dynamic shared object Handle.
+Kernel::UIntPtr __dso_handle;
+
+EXTERN_C Kernel::Void __cxa_pure_virtual(void* self) {
+  (Kernel::Void)(Kernel::kout << "object: "
+                              << Kernel::number(reinterpret_cast<Kernel::UIntPtr>(self)));
+  (Kernel::Void)(Kernel::kout << ", has unimplemented virtual functions.\r");
+}
+
+EXTERN_C void ___chkstk_ms(PtrDiff frame_size) {
+  char* sp;
+  asm volatile("mov %%rsp, %0" : "=r"(sp));
+
+  for (PtrDiff offset = kPageSize; offset < frame_size; offset += kPageSize) {
+    sp[-offset] = 0;
+  }
+}
+
+EXTERN_C int atexit(void (*f)()) {
+  if (__atexit_func_count >= kAtExitMacDestructors) return 1;
+
+  __atexit_funcs[__atexit_func_count].destructor_func = f;
+
+  __atexit_func_count++;
+
+  return 0;
+}
+
+EXTERN_C void __cxa_finalize(void* f) {
+  uarch_t i = __atexit_func_count;
+  if (!f) {
+    while (i--) {
+      if (__atexit_funcs[i].destructor_func) {
+        (*__atexit_funcs[i].destructor_func)();
+      };
+    }
+
+    return;
+  }
+
+  while (i--) {
+    if (__atexit_funcs[i].destructor_func) {
+      (*__atexit_funcs[i].destructor_func)();
+      __atexit_funcs[i].destructor_func = 0;
+    };
+  }
+}
+
+namespace cxxabiv1 {
+EXTERN_C int __cxa_guard_acquire(__guard g) {
+  if ((*g & 1) || (*g & 2)) return 1;
+  *g |= 2;
+  return 0;
+}
+
+EXTERN_C void __cxa_guard_release(__guard g) {
+  *g |= 1;
+  *g &= 2;
+}
+
+EXTERN_C void __cxa_guard_abort(__guard g) {
+  *g &= ~2;
+}
+}  // namespace cxxabiv1