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Merge remote-tracking branch 'Kernel/master'
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EnderIce2
254
Kernel/library/kexcept/cxxabi.cpp
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254
Kernel/library/kexcept/cxxabi.cpp
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@ -0,0 +1,254 @@
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/*
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This file is part of Fennix Kernel.
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Fennix Kernel is free software: you can redistribute it and/or
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modify it under the terms of the GNU General Public License as
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published by the Free Software Foundation, either version 3 of
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the License, or (at your option) any later version.
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Fennix Kernel is distributed in the hope that it will be useful,
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but WITHOUT ANY WARRANTY; without even the implied warranty of
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MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
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GNU General Public License for more details.
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You should have received a copy of the GNU General Public License
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along with Fennix Kernel. If not, see <https://www.gnu.org/licenses/>.
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*/
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#include <kexcept/cxxabi.h>
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#include <memory.hpp>
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#include <debug.h>
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#include <smp.hpp>
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#include "../../kernel.h"
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extern "C" _Unwind_Reason_Code _Unwind_RaiseException(_Unwind_Exception *Exception);
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using namespace __cxxabiv1;
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atexit_func_entry_t __atexit_funcs[ATEXIT_MAX_FUNCS];
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uarch_t __atexit_func_count = 0;
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__cxa_eh_globals *__cxa_get_globals() noexcept
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{
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return &GetCurrentCPU()->Exception.globals;
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}
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/**
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* @param f The destructor
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* @param objptr The object to be destructed
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* @param dso The DSO from which the object was obtained (unused in our case)
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* @return Zero on success, non-zero on failure
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*/
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extern "C" int __cxa_atexit(void (*f)(void *), void *objptr, void *dso)
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{
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if (KernelSymbolTable)
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{
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debug("Registering atexit function for \"%s\" with destructor \"%s\"",
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KernelSymbolTable->GetSymbol((uintptr_t)objptr),
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KernelSymbolTable->GetSymbol((uintptr_t)f));
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}
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else
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{
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debug("Registering atexit function for %p with destructor %p",
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objptr, f);
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}
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if (__atexit_func_count >= ATEXIT_MAX_FUNCS)
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return -1;
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__atexit_funcs[__atexit_func_count].destructor_func = f;
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__atexit_funcs[__atexit_func_count].obj_ptr = objptr;
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__atexit_funcs[__atexit_func_count].dso_handle = dso;
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__atexit_func_count++;
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return 0;
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}
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extern "C" void __cxa_finalize(void *f)
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{
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func("%p", f);
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uarch_t i = __atexit_func_count;
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if (f == nullptr)
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{
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while (i--)
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{
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if (__atexit_funcs[i].destructor_func)
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{
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if (KernelSymbolTable)
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{
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debug("Calling atexit function \"%s\"",
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KernelSymbolTable->GetSymbol((uintptr_t)__atexit_funcs[i].destructor_func));
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}
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else
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{
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debug("Calling atexit function %p",
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__atexit_funcs[i].destructor_func);
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}
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(*__atexit_funcs[i].destructor_func)(__atexit_funcs[i].obj_ptr);
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}
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}
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return;
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}
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while (i--)
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{
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if (__atexit_funcs[i].destructor_func == f)
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{
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(*__atexit_funcs[i].destructor_func)(__atexit_funcs[i].obj_ptr);
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__atexit_funcs[i].destructor_func = 0;
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}
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}
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}
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extern "C" _Unwind_Reason_Code __gxx_personality_v0(int version, _Unwind_Action actions, _Unwind_Exception_Class exception_class, _Unwind_Exception *ue_header, _Unwind_Context *context)
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{
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fixme("__gxx_personality_v0( %d %p %p %p %p ) called.", version, actions, exception_class, ue_header, context);
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return _URC_NO_REASON;
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}
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extern "C" void *__cxa_begin_catch(void *thrown_object) noexcept
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{
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func("%p", thrown_object);
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__cxa_exception *Exception = (__cxa_exception *)thrown_object - 1;
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__cxa_eh_globals *Globals = __cxa_get_globals();
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Exception->handlerCount++;
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Globals->uncaughtExceptions--;
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Exception->nextException = Globals->caughtExceptions;
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Globals->caughtExceptions = Exception;
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return Exception + 1;
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}
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extern "C" void __cxa_end_catch()
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{
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fixme("__cxa_end_catch() called.");
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}
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static __always_inline inline size_t align_exception_allocation_size(size_t a, size_t b)
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{
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return (a + b - 1) & ~(b - 1);
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}
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static __always_inline inline void INIT_EXCEPTION_CLASS(_Unwind_Exception_Class *c)
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{
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char *ptr = (char *)c;
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ptr[0] = 'G';
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ptr[1] = 'N';
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ptr[2] = 'U';
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ptr[3] = 'C';
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ptr[4] = 'C';
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ptr[5] = '+';
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ptr[6] = '+';
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ptr[7] = '\0';
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}
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void unexpected_header_stub() { fixme("unexpected() called."); }
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void terminate_header_stub()
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{
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if (TaskManager && !TaskManager->IsPanic())
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{
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TaskManager->KillThread(thisThread, Tasking::KILL_CXXABI_EXCEPTION);
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TaskManager->Yield();
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}
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error("No task manager to kill thread!");
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CPU::Stop(); /* FIXME: Panic */
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}
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void exception_cleanup_stub(_Unwind_Reason_Code Code,
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_Unwind_Exception *Exception)
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{
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fixme("exception_cleanup( %d %p ) called.",
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Code, Exception);
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}
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extern "C" void *__cxa_allocate_exception(size_t thrown_size) throw()
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{
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debug("Allocating exception of size %d.", thrown_size);
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size_t alloc_size = align_exception_allocation_size(thrown_size + sizeof(__cxa_exception), alignof(__cxa_exception));
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__cxa_exception *Exception = (__cxa_exception *)kmalloc(alloc_size);
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memset(Exception, 0, alloc_size);
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return Exception + 1;
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}
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extern "C" __noreturn void __cxa_throw(void *thrown_object,
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std::type_info *tinfo,
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void (*dest)(void *))
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{
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trace("Throwing exception of type \"%s\". ( object: %p, destructor: %p )",
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tinfo->name(), thrown_object, dest);
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__cxa_eh_globals *Globals = __cxa_get_globals();
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Globals->uncaughtExceptions++;
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__cxa_exception *Exception = (__cxa_exception *)thrown_object - 1;
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Exception->exceptionType = (std::type_info *)tinfo;
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Exception->exceptionDestructor = dest;
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Exception->unexpectedHandler = &unexpected_header_stub;
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Exception->terminateHandler = &terminate_header_stub;
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Exception->unwindHeader.exception_cleanup = &exception_cleanup_stub;
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INIT_EXCEPTION_CLASS(&Exception->unwindHeader.exception_class);
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Exception->adjustedPtr = thrown_object;
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_Unwind_RaiseException(&Exception->unwindHeader);
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__cxa_begin_catch(&Exception->unwindHeader);
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error("Uncaught exception!");
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CPU::Stop(); /* FIXME: Panic */
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}
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extern "C" void __cxa_rethrow()
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{
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fixme("__cxa_rethrow() called.");
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}
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extern "C" void __cxa_pure_virtual()
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{
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fixme("__cxa_pure_virtual() called.");
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}
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extern "C" void __cxa_throw_bad_array_new_length()
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{
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fixme("__cxa_throw_bad_array_new_length() called.");
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}
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extern "C" void __cxa_free_exception(void *thrown_exception)
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{
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fixme("__cxa_free_exception( %p ) called.",
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thrown_exception);
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}
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__extension__ typedef int __guard __attribute__((mode(__DI__)));
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extern "C" int __cxa_guard_acquire(__guard *g)
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{
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fixme("__cxa_guard_acquire( %p ) called.", g);
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return !*(char *)(g);
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}
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extern "C" void __cxa_guard_release(__guard *g)
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{
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fixme("__cxa_guard_release( %p ) called.", g);
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*(char *)g = 1;
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}
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extern "C" void __cxa_guard_abort(__guard *g)
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{
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fixme("__cxa_guard_abort( %p ) called.", g);
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}
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extern "C" __noreturn void __cxa_bad_typeid()
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{
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fixme("__cxa_bad_typeid() called.");
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CPU::Stop(); /* FIXME: Crash the system */
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}
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extern "C" void *__cxa_get_exception_ptr(void *exceptionObject)
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{
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stub;
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return nullptr;
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}
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25
Kernel/library/kexcept/dso.c
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25
Kernel/library/kexcept/dso.c
Normal file
@ -0,0 +1,25 @@
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/*
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This file is part of Fennix Kernel.
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Fennix Kernel is free software: you can redistribute it and/or
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modify it under the terms of the GNU General Public License as
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published by the Free Software Foundation, either version 3 of
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the License, or (at your option) any later version.
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Fennix Kernel is distributed in the hope that it will be useful,
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but WITHOUT ANY WARRANTY; without even the implied warranty of
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MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
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GNU General Public License for more details.
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You should have received a copy of the GNU General Public License
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along with Fennix Kernel. If not, see <https://www.gnu.org/licenses/>.
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*/
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#include <debug.h>
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void __dso_handle_stub()
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{
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stub;
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}
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/* extern */ void *__dso_handle = (void *)&__dso_handle_stub;
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47
Kernel/library/kexcept/unwind.cpp
Normal file
47
Kernel/library/kexcept/unwind.cpp
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@ -0,0 +1,47 @@
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/*
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This file is part of Fennix Kernel.
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Fennix Kernel is free software: you can redistribute it and/or
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modify it under the terms of the GNU General Public License as
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published by the Free Software Foundation, either version 3 of
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the License, or (at your option) any later version.
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Fennix Kernel is distributed in the hope that it will be useful,
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but WITHOUT ANY WARRANTY; without even the implied warranty of
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MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
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GNU General Public License for more details.
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You should have received a copy of the GNU General Public License
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along with Fennix Kernel. If not, see <https://www.gnu.org/licenses/>.
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*/
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#include <kexcept/unwind.h>
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#include <kexcept/cxxabi.h>
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#include <debug.h>
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#include <cpu.hpp>
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#include <smp.hpp>
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#include "../../kernel.h"
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using namespace __cxxabiv1;
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#if (1) /* Set to 0 to use a library or 1 to use this code */
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extern "C" _Unwind_Reason_Code _Unwind_RaiseException(struct _Unwind_Exception *object)
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{
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stub;
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return _URC_NO_REASON;
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}
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extern "C" void _Unwind_Resume(struct _Unwind_Exception *object)
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{
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stub;
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}
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extern "C" _Unwind_Reason_Code _Unwind_Resume_or_Rethrow(struct _Unwind_Exception *exception_object)
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{
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stub;
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return _URC_NO_REASON;
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}
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#endif // 0 or 1
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