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/* SPDX-License-Identifier: GPL-2.0-or-later */
/* Copyright (C) 2026 Richard Qin */
/*
* cxx_abi.cc — Minimal C++ ABI stubs for freestanding kernel
*
* Provides symbols that the compiler/linker expects from the C++
* runtime library. All error paths are fatal (kernel_panic).
*
* Reference: docs/specs/cpp_runtime.md
*/
#include <lume/klog.h>
/* Pure virtual function call trap.
* Generated by the compiler in vtable entries for pure virtual methods.
* Reaching this means a derived class failed to implement a pure virtual. */
extern "C" void __cxa_pure_virtual()
{
kernel_panic("pure virtual function call");
}
/* Global destructor registration.
* The kernel does not support global object destruction — all global
* objects use Placement New with explicit lifetime management.
* If the compiler emits a call to this, it indicates a code violation. */
extern "C" int __cxa_atexit(void (*)(void*), void*, void*)
{
kernel_panic("__cxa_atexit called in kernel");
return 0; // unreachable
}
/* DSO handle — required by __cxa_atexit ABI.
* The kernel is statically linked; this symbol just needs to exist. */
extern "C" {
void* __dso_handle __attribute__((visibility("hidden"))) = nullptr;
}
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