--- /dev/null
+// -*- C++ -*- ARM specific Exception handling support routines.
+// Copyright (C) 2004, 2005, 2008, 2009 Free Software Foundation, Inc.
+//
+// This file is part of GCC.
+//
+// GCC is free software; you can redistribute it and/or modify
+// it under the terms of the GNU General Public License as published by
+// the Free Software Foundation; either version 3, or (at your option)
+// any later version.
+//
+// GCC is distributed in the hope that it will be useful,
+// but WITHOUT ANY WARRANTY; without even the implied warranty of
+// MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
+// GNU General Public License for more details.
+//
+// Under Section 7 of GPL version 3, you are granted additional
+// permissions described in the GCC Runtime Library Exception, version
+// 3.1, as published by the Free Software Foundation.
+//
+// You should have received a copy of the GNU General Public License and
+// a copy of the GCC Runtime Library Exception along with this program;
+// see the files COPYING3 and COPYING.RUNTIME respectively. If not, see
+// <http://www.gnu.org/licenses/>.
+
+#include <cxxabi.h>
+#include "unwind-cxx.h"
+
+#ifdef __ARM_EABI_UNWINDER__
+
+using namespace __cxxabiv1;
+
+
+// Given the thrown type THROW_TYPE, pointer to a variable containing a
+// pointer to the exception object THROWN_PTR_P and a type CATCH_TYPE to
+// compare against, return whether or not there is a match and if so,
+// update *THROWN_PTR_P.
+
+extern "C" __cxa_type_match_result
+__cxa_type_match(_Unwind_Exception* ue_header,
+ const std::type_info* catch_type,
+ bool is_reference __attribute__((__unused__)),
+ void** thrown_ptr_p)
+{
+ bool forced_unwind = __is_gxx_forced_unwind_class(ue_header->exception_class);
+ bool foreign_exception = !forced_unwind && !__is_gxx_exception_class(ue_header->exception_class);
+ bool dependent_exception =
+ __is_dependent_exception(ue_header->exception_class);
+ __cxa_exception* xh = __get_exception_header_from_ue(ue_header);
+ __cxa_dependent_exception *dx = __get_dependent_exception_from_ue(ue_header);
+ const std::type_info* throw_type;
+
+ if (forced_unwind)
+ throw_type = &typeid(abi::__forced_unwind);
+ else if (foreign_exception)
+ throw_type = &typeid(abi::__foreign_exception);
+ else if (dependent_exception)
+ throw_type = __get_exception_header_from_obj
+ (dx->primaryException)->exceptionType;
+ else
+ throw_type = xh->exceptionType;
+
+ void* thrown_ptr = *thrown_ptr_p;
+
+ // Pointer types need to adjust the actual pointer, not
+ // the pointer to pointer that is the exception object.
+ // This also has the effect of passing pointer types
+ // "by value" through the __cxa_begin_catch return value.
+ if (throw_type->__is_pointer_p())
+ thrown_ptr = *(void**) thrown_ptr;
+
+ if (catch_type->__do_catch(throw_type, &thrown_ptr, 1))
+ {
+ *thrown_ptr_p = thrown_ptr;
+
+ if (typeid(*catch_type) == typeid (typeid(void*)))
+ {
+ const __pointer_type_info *catch_pointer_type =
+ static_cast<const __pointer_type_info *> (catch_type);
+ const __pointer_type_info *throw_pointer_type =
+ static_cast<const __pointer_type_info *> (throw_type);
+
+ if (typeid (*catch_pointer_type->__pointee) != typeid (void)
+ && (*catch_pointer_type->__pointee !=
+ *throw_pointer_type->__pointee))
+ return ctm_succeeded_with_ptr_to_base;
+ }
+
+ return ctm_succeeded;
+ }
+
+ return ctm_failed;
+}
+
+// ABI defined routine called at the start of a cleanup handler.
+extern "C" bool
+__cxa_begin_cleanup(_Unwind_Exception* ue_header)
+{
+ __cxa_eh_globals *globals = __cxa_get_globals();
+ __cxa_exception *header = __get_exception_header_from_ue(ue_header);
+ bool native = __is_gxx_exception_class(header->unwindHeader.exception_class);
+
+
+ if (native)
+ {
+ header->propagationCount++;
+ // Add it to the chain if this is the first time we've seen this
+ // exception.
+ if (header->propagationCount == 1)
+ {
+ header->nextPropagatingException = globals->propagatingExceptions;
+ globals->propagatingExceptions = header;
+ }
+ }
+ else
+ {
+ // Remember the exception object, so end_cleanup can return it.
+ // These cannot be stacked, so we must abort if we already have
+ // a propagating exception.
+ if (globals->propagatingExceptions)
+ std::terminate ();
+ globals->propagatingExceptions = header;
+ }
+
+ return true;
+}
+
+// Do the work for __cxa_end_cleanup. Returns the currently propagating
+// exception object.
+extern "C" _Unwind_Exception *
+__gnu_end_cleanup(void)
+{
+ __cxa_exception *header;
+ __cxa_eh_globals *globals = __cxa_get_globals();
+
+ header = globals->propagatingExceptions;
+
+ // Check something hasn't gone horribly wrong.
+ if (!header)
+ std::terminate();
+
+ if (__is_gxx_exception_class(header->unwindHeader.exception_class))
+ {
+ header->propagationCount--;
+ if (header->propagationCount == 0)
+ {
+ // Remove exception from chain.
+ globals->propagatingExceptions = header->nextPropagatingException;
+ header->nextPropagatingException = NULL;
+ }
+ }
+ else
+ globals->propagatingExceptions = NULL;
+
+ return &header->unwindHeader;
+}
+
+// Assembly wrapper to call __gnu_end_cleanup without clobbering r1-r3.
+// Also push r4 to preserve stack alignment.
+#ifdef __thumb__
+asm (".global __cxa_end_cleanup\n"
+" .type __cxa_end_cleanup, \"function\"\n"
+" .thumb_func\n"
+"__cxa_end_cleanup:\n"
+" push\t{r1, r2, r3, r4}\n"
+" bl\t__gnu_end_cleanup\n"
+" pop\t{r1, r2, r3, r4}\n"
+" bl\t_Unwind_Resume @ Never returns\n");
+#else
+asm (".global __cxa_end_cleanup\n"
+" .type __cxa_end_cleanup, \"function\"\n"
+"__cxa_end_cleanup:\n"
+" stmfd\tsp!, {r1, r2, r3, r4}\n"
+" bl\t__gnu_end_cleanup\n"
+" ldmfd\tsp!, {r1, r2, r3, r4}\n"
+" bl\t_Unwind_Resume @ Never returns\n");
+#endif
+
+#endif
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