Based on code from Qemu
Reported-by: Stefan Dösinger stefan@codeweavers.com Signed-off-by: André Hentschel nerv@dawncrow.de --- dlls/ntdll/signal_arm64.c | 20 ++++++++++++++++++-- 1 file changed, 18 insertions(+), 2 deletions(-)
diff --git a/dlls/ntdll/signal_arm64.c b/dlls/ntdll/signal_arm64.c index a04fe93..57ec13a 100644 --- a/dlls/ntdll/signal_arm64.c +++ b/dlls/ntdll/signal_arm64.c @@ -568,6 +568,23 @@ static NTSTATUS raise_exception( EXCEPTION_RECORD *rec, CONTEXT *context, BOOL f return STATUS_SUCCESS; }
+static inline DWORD is_write_fault( ucontext_t *context ) +{ + DWORD inst = *(DWORD *)PC_sig(context); + if ((inst & 0xbfff0000) == 0x0c000000 /* C3.3.1 */ || + (inst & 0xbfe00000) == 0x0c800000 /* C3.3.2 */ || + (inst & 0xbfdf0000) == 0x0d000000 /* C3.3.3 */ || + (inst & 0xbfc00000) == 0x0d800000 /* C3.3.4 */ || + (inst & 0x3f400000) == 0x08000000 /* C3.3.6 */ || + (inst & 0x3bc00000) == 0x38000000 /* C3.3.8-12 */ || + (inst & 0x3fe00000) == 0x3c800000 /* C3.3.8-12 128bit */ || + (inst & 0x3bc00000) == 0x39000000 /* C3.3.13 */ || + (inst & 0x3fc00000) == 0x3d800000 /* C3.3.13 128bit */ || + (inst & 0x3a400000) == 0x28000000) /* C3.3.7,14-16 */ + return EXCEPTION_WRITE_FAULT; + return EXCEPTION_READ_FAULT; +} + /********************************************************************** * segv_handler * @@ -604,8 +621,7 @@ static void segv_handler( int signal, siginfo_t *info, void *ucontext ) case SIGSEGV: /* Segmentation fault */ rec->ExceptionCode = EXCEPTION_ACCESS_VIOLATION; rec->NumberParameters = 2; - /* FIXME: Currently the kernel provides no way to determine if it's read or write */ - rec->ExceptionInformation[0] = 0; + rec->ExceptionInformation[0] = is_write_fault(context); rec->ExceptionInformation[1] = (ULONG_PTR)info->si_addr; break; case SIGBUS: /* Alignment check exception */