Paul Gofman : ntdll: Don't call NtRaiseException() on x64 if debugger is not present.
Module: wine Branch: master Commit: af3aee8a5a2852951b1fbc6e355e674fed9d4c5c URL: https://source.winehq.org/git/wine.git/?a=commit;h=af3aee8a5a2852951b1fbc6e3... Author: Paul Gofman <pgofman(a)codeweavers.com> Date: Fri Jul 3 13:22:24 2020 +0300 ntdll: Don't call NtRaiseException() on x64 if debugger is not present. Signed-off-by: Paul Gofman <pgofman(a)codeweavers.com> Signed-off-by: Alexandre Julliard <julliard(a)winehq.org> --- dlls/ntdll/signal_x86_64.c | 7 ++- dlls/ntdll/tests/exception.c | 114 ++++++++++++++++++++++++++++++++++++++++--- 2 files changed, 113 insertions(+), 8 deletions(-) diff --git a/dlls/ntdll/signal_x86_64.c b/dlls/ntdll/signal_x86_64.c index dde0bb7339..c7c8b96405 100644 --- a/dlls/ntdll/signal_x86_64.c +++ b/dlls/ntdll/signal_x86_64.c @@ -1338,7 +1338,12 @@ __ASM_GLOBAL_FUNC( RtlRaiseException, "movq %rax,0xf8(%rdx)\n\t" /* context->Rip */ "movq %rax,0x10(%rcx)\n\t" /* rec->ExceptionAddress */ "movl $1,%r8d\n\t" - "call " __ASM_NAME("NtRaiseException") "\n\t" + "movq %gs:(0x30),%rax\n\t" /* Teb */ + "movq 0x60(%rax),%rax\n\t" /* Peb */ + "cmpb $0,0x02(%rax)\n\t" /* BeingDebugged */ + "jne 1f\n\t" + "call " __ASM_NAME("dispatch_exception") "\n" + "1:\tcall " __ASM_NAME("NtRaiseException") "\n\t" "movq %rax,%rcx\n\t" "call " __ASM_NAME("RtlRaiseStatus") /* does not return */ ); diff --git a/dlls/ntdll/tests/exception.c b/dlls/ntdll/tests/exception.c index 7a25ffbbbc..77fcf71ba1 100644 --- a/dlls/ntdll/tests/exception.c +++ b/dlls/ntdll/tests/exception.c @@ -1677,6 +1677,19 @@ static DWORD dbg_except_continue_handler(EXCEPTION_RECORD *rec, EXCEPTION_REGIST return ExceptionContinueExecution; } +static LONG WINAPI dbg_except_continue_vectored_handler(struct _EXCEPTION_POINTERS *e) +{ + EXCEPTION_RECORD *rec = e->ExceptionRecord; + CONTEXT *context = e->ContextRecord; + + trace("dbg_except_continue_vectored_handler, code %#x, eip %#x.\n", rec->ExceptionCode, context->Eip); + + got_exception = 1; + ++context->Eip; + + return EXCEPTION_CONTINUE_EXECUTION; +} + /* Use CDECL to leave arguments on stack. */ void CDECL hook_KiUserExceptionDispatcher(EXCEPTION_RECORD *rec, CONTEXT *context) { @@ -1714,8 +1727,10 @@ static void test_kiuserexceptiondispatcher(void) 0x00, 0x00, 0x00, 0x00, /* jmpq *addr */ /* jump to original function. */ }; void *phook_KiUserExceptionDispatcher = hook_KiUserExceptionDispatcher; + BYTE patched_KiUserExceptionDispatcher_bytes[7]; void *phook_trampoline = hook_trampoline; DWORD old_protect1, old_protect2; + EXCEPTION_RECORD record; BYTE *ptr; BOOL ret; @@ -1738,7 +1753,8 @@ static void test_kiuserexceptiondispatcher(void) memcpy(saved_KiUserExceptionDispatcher_bytes, pKiUserExceptionDispatcher, sizeof(saved_KiUserExceptionDispatcher_bytes)); - ptr = (BYTE *)pKiUserExceptionDispatcher; + + ptr = patched_KiUserExceptionDispatcher_bytes; /* mov hook_trampoline, %eax */ *ptr++ = 0xa1; *(void **)ptr = &phook_trampoline; @@ -1747,9 +1763,12 @@ static void test_kiuserexceptiondispatcher(void) *ptr++ = 0xff; *ptr++ = 0xe0; + memcpy(pKiUserExceptionDispatcher, patched_KiUserExceptionDispatcher_bytes, + sizeof(patched_KiUserExceptionDispatcher_bytes)); got_exception = 0; run_exception_test(dbg_except_continue_handler, NULL, except_code, ARRAY_SIZE(except_code), PAGE_EXECUTE_READ); + ok(got_exception, "Handler was not called.\n"); ok(hook_called, "Hook was not called.\n"); @@ -1761,6 +1780,25 @@ static void test_kiuserexceptiondispatcher(void) ok(dbg_except_continue_handler_eip == code_mem, "Got unexpected exception address %p, expected %p.\n", dbg_except_continue_handler_eip, code_mem); + record.ExceptionCode = 0x80000003; + record.ExceptionFlags = 0; + record.ExceptionRecord = NULL; + record.ExceptionAddress = NULL; /* does not matter, copied return address */ + record.NumberParameters = 0; + + AddVectoredExceptionHandler(TRUE, dbg_except_continue_vectored_handler); + + memcpy(pKiUserExceptionDispatcher, patched_KiUserExceptionDispatcher_bytes, + sizeof(patched_KiUserExceptionDispatcher_bytes)); + got_exception = 0; + hook_called = FALSE; + + pRtlRaiseException(&record); + + ok(got_exception, "Handler was not called.\n"); + ok(hook_called, "Hook was not called.\n"); + + RemoveVectoredExceptionHandler(dbg_except_continue_vectored_handler); ret = VirtualProtect(pKiUserExceptionDispatcher, sizeof(saved_KiUserExceptionDispatcher_bytes), old_protect2, &old_protect2); ok(ret, "Got unexpected ret %#x, GetLastError() %u.\n", ret, GetLastError()); @@ -2777,17 +2815,37 @@ static void *hook_exception_address; static DWORD dbg_except_continue_handler(EXCEPTION_RECORD *rec, EXCEPTION_REGISTRATION_RECORD *frame, CONTEXT *context, EXCEPTION_REGISTRATION_RECORD **dispatcher) { - ok(hook_called, "Hook was not called.\n"); + trace("handler context->Rip %#lx, codemem %p.\n", context->Rip, code_mem); got_exception = 1; dbg_except_continue_handler_rip = (void *)context->Rip; ++context->Rip; + memcpy(pKiUserExceptionDispatcher, saved_KiUserExceptionDispatcher_bytes, + sizeof(saved_KiUserExceptionDispatcher_bytes)); + return ExceptionContinueExecution; } +static LONG WINAPI dbg_except_continue_vectored_handler(struct _EXCEPTION_POINTERS *e) +{ + EXCEPTION_RECORD *rec = e->ExceptionRecord; + CONTEXT *context = e->ContextRecord; + + trace("dbg_except_continue_vectored_handler, code %#x, Rip %#lx.\n", rec->ExceptionCode, context->Rip); + + got_exception = 1; + if (NtCurrentTeb()->Peb->BeingDebugged || !strcmp( winetest_platform, "wine" )) + { + todo_wine_if(!NtCurrentTeb()->Peb->BeingDebugged) + ok(NtCurrentTeb()->Peb->BeingDebugged, "context->Rip misplaced for dbg breakpoint exception.\n"); + ++context->Rip; + } + return EXCEPTION_CONTINUE_EXECUTION; +} + void WINAPI hook_KiUserExceptionDispatcher(EXCEPTION_RECORD *rec, CONTEXT *context) { trace("rec %p, context %p.\n", rec, context); - trace("context->Rip %#lx, context->Rsp %#lx, ContextFlags %#lx.\n", sizeof(*context), + trace("context->Rip %#lx, context->Rsp %#lx, ContextFlags %#lx.\n", context->Rip, context->Rsp, context->ContextFlags); hook_called = TRUE; @@ -2824,8 +2882,11 @@ static void test_kiuserexceptiondispatcher(void) /* offset: 27 bytes */ 0x00, 0x00, 0x00, 0x00, /* jmpq *addr */ /* jump to original function. */ }; + void *phook_KiUserExceptionDispatcher = hook_KiUserExceptionDispatcher; + BYTE patched_KiUserExceptionDispatcher_bytes[12]; DWORD old_protect1, old_protect2; + EXCEPTION_RECORD record; BYTE *ptr; BOOL ret; @@ -2847,11 +2908,13 @@ static void test_kiuserexceptiondispatcher(void) ret = VirtualProtect(hook_trampoline, ARRAY_SIZE(hook_trampoline), PAGE_EXECUTE_READWRITE, &old_protect1); ok(ret, "Got unexpected ret %#x, GetLastError() %u.\n", ret, GetLastError()); - ret = VirtualProtect(pKiUserExceptionDispatcher, 5, PAGE_EXECUTE_READWRITE, &old_protect2); + ret = VirtualProtect(pKiUserExceptionDispatcher, sizeof(saved_KiUserExceptionDispatcher_bytes), + PAGE_EXECUTE_READWRITE, &old_protect2); ok(ret, "Got unexpected ret %#x, GetLastError() %u.\n", ret, GetLastError()); - memcpy(saved_KiUserExceptionDispatcher_bytes, pKiUserExceptionDispatcher, sizeof(saved_KiUserExceptionDispatcher_bytes)); - ptr = (BYTE *)pKiUserExceptionDispatcher; + memcpy(saved_KiUserExceptionDispatcher_bytes, pKiUserExceptionDispatcher, + sizeof(saved_KiUserExceptionDispatcher_bytes)); + ptr = (BYTE *)patched_KiUserExceptionDispatcher_bytes; /* mov hook_trampoline, %rax */ *ptr++ = 0x48; *ptr++ = 0xb8; @@ -2861,6 +2924,8 @@ static void test_kiuserexceptiondispatcher(void) *ptr++ = 0xff; *ptr++ = 0xe0; + memcpy(pKiUserExceptionDispatcher, patched_KiUserExceptionDispatcher_bytes, + sizeof(patched_KiUserExceptionDispatcher_bytes)); got_exception = 0; run_exception_test(dbg_except_continue_handler, NULL, except_code, ARRAY_SIZE(except_code), PAGE_EXECUTE_READ); ok(got_exception, "Handler was not called.\n"); @@ -2874,7 +2939,42 @@ static void test_kiuserexceptiondispatcher(void) ok(dbg_except_continue_handler_rip == code_mem, "Got unexpected exception address %p, expected %p.\n", dbg_except_continue_handler_rip, code_mem); - ret = VirtualProtect(pKiUserExceptionDispatcher, 5, old_protect2, &old_protect2); + memset(&record, 0, sizeof(record)); + record.ExceptionCode = 0x80000003; + record.ExceptionFlags = 0; + record.ExceptionRecord = NULL; + record.ExceptionAddress = NULL; + record.NumberParameters = 0; + + AddVectoredExceptionHandler(TRUE, dbg_except_continue_vectored_handler); + + memcpy(pKiUserExceptionDispatcher, patched_KiUserExceptionDispatcher_bytes, + sizeof(patched_KiUserExceptionDispatcher_bytes)); + got_exception = 0; + hook_called = FALSE; + + pRtlRaiseException(&record); + + ok(got_exception, "Handler was not called.\n"); + ok(!hook_called, "Hook was called.\n"); + + memcpy(pKiUserExceptionDispatcher, patched_KiUserExceptionDispatcher_bytes, + sizeof(patched_KiUserExceptionDispatcher_bytes)); + got_exception = 0; + hook_called = FALSE; + NtCurrentTeb()->Peb->BeingDebugged = 1; + + pRtlRaiseException(&record); + + ok(got_exception, "Handler was not called.\n"); + ok(hook_called, "Hook was not called.\n"); + + NtCurrentTeb()->Peb->BeingDebugged = 0; + + RemoveVectoredExceptionHandler(dbg_except_continue_vectored_handler); + + ret = VirtualProtect(pKiUserExceptionDispatcher, sizeof(saved_KiUserExceptionDispatcher_bytes), + old_protect2, &old_protect2); ok(ret, "Got unexpected ret %#x, GetLastError() %u.\n", ret, GetLastError()); ret = VirtualProtect(hook_trampoline, ARRAY_SIZE(hook_trampoline), old_protect1, &old_protect1); ok(ret, "Got unexpected ret %#x, GetLastError() %u.\n", ret, GetLastError());
participants (1)
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Alexandre Julliard