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[Kernel] Research on C++ exceptions.

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gibbed
2018-11-25 10:01:22 -06:00
parent 64403d5dc6
commit 70b07712b2
1 changed files with 89 additions and 37 deletions
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62
src/xenia/kernel/xboxkrnl/xboxkrnl_debug.cc
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@@ -31,8 +31,7 @@ typedef struct {
} X_THREADNAME_INFO; } X_THREADNAME_INFO;
static_assert_size(X_THREADNAME_INFO, 0x10); static_assert_size(X_THREADNAME_INFO, 0x10);
void RtlRaiseException(pointer_t<X_EXCEPTION_RECORD> record) { void HandleSetThreadName(pointer_t<X_EXCEPTION_RECORD> record) {
if (record->exception_code == 0x406D1388) {
// SetThreadName. FFS. // SetThreadName. FFS.
// https://msdn.microsoft.com/en-us/library/xcb2z8hs.aspx // https://msdn.microsoft.com/en-us/library/xcb2z8hs.aspx
@@ -66,15 +65,68 @@ void RtlRaiseException(pointer_t<X_EXCEPTION_RECORD> record) {
} }
// TODO(benvanik): unwinding required here? // TODO(benvanik): unwinding required here?
return; }
}
if (record->exception_code == 0xE06D7363) { typedef struct {
xe::be<int32_t> mdisp;
xe::be<int32_t> pdisp;
xe::be<int32_t> vdisp;
} x_PMD;
typedef struct {
xe::be<uint32_t> properties;
xe::be<uint32_t> type_ptr;
x_PMD this_displacement;
xe::be<int32_t> size_or_offset;
xe::be<uint32_t> copy_function_ptr;
} x_s__CatchableType;
typedef struct {
xe::be<int32_t> number_catchable_types;
xe::be<uint32_t> catchable_type_ptrs[1];
} x_s__CatchableTypeArray;
typedef struct {
xe::be<uint32_t> attributes;
xe::be<uint32_t> unwind_ptr;
xe::be<uint32_t> forward_compat_ptr;
xe::be<uint32_t> catchable_type_array_ptr;
} x_s__ThrowInfo;
void HandleCppException(pointer_t<X_EXCEPTION_RECORD> record) {
// C++ exception. // C++ exception.
// https://blogs.msdn.com/b/oldnewthing/archive/2010/07/30/10044061.aspx // https://blogs.msdn.com/b/oldnewthing/archive/2010/07/30/10044061.aspx
// http://www.drdobbs.com/visual-c-exception-handling-instrumentat/184416600
// http://www.openrce.org/articles/full_view/21
assert_true(record->number_parameters == 3);
assert_true(record->exception_information[0] == 0x19930520);
auto thrown_ptr = record->exception_information[1];
auto thrown = kernel_memory()->TranslateVirtual(thrown_ptr);
auto vftable_ptr = *reinterpret_cast<xe::be<uint32_t>*>(thrown);
auto throw_info_ptr = record->exception_information[2];
auto throw_info =
kernel_memory()->TranslateVirtual<x_s__ThrowInfo*>(throw_info_ptr);
auto catchable_types =
kernel_memory()->TranslateVirtual<x_s__CatchableTypeArray*>(
throw_info->catchable_type_array_ptr);
xe::debugging::Break(); xe::debugging::Break();
}
void RtlRaiseException(pointer_t<X_EXCEPTION_RECORD> record) {
switch (record->exception_code) {
case 0x406D1388: {
HandleSetThreadName(record);
return; return;
} }
case 0xE06D7363: {
HandleCppException(record);
return;
}
}
// TODO(benvanik): unwinding. // TODO(benvanik): unwinding.
// This is going to suck. // This is going to suck.