ntdll: Save/restore FPU context in arm64 signal handlers.
Wine-Bug: https://bugs.winehq.org/show_bug.cgi?id=51996 Signed-off-by: Jinoh Kang <jinoh.kang.kr@gmail.com> Signed-off-by: Alexandre Julliard <julliard@winehq.org>
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@ -84,7 +84,7 @@ WINE_DEFAULT_DEBUG_CHANNEL(seh);
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# define FP_sig(context) REGn_sig(29, context) /* Frame pointer */
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# define LR_sig(context) REGn_sig(30, context) /* Link Register */
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static struct _aarch64_ctx *get_extended_sigcontext( ucontext_t *sigcontext, unsigned int magic )
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static struct _aarch64_ctx *get_extended_sigcontext( const ucontext_t *sigcontext, unsigned int magic )
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{
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struct _aarch64_ctx *ctx = (struct _aarch64_ctx *)sigcontext->uc_mcontext.__reserved;
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while ((char *)ctx < (char *)(&sigcontext->uc_mcontext + 1) && ctx->magic && ctx->size)
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@ -95,7 +95,7 @@ static struct _aarch64_ctx *get_extended_sigcontext( ucontext_t *sigcontext, uns
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return NULL;
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}
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static struct fpsimd_context *get_fpsimd_context( ucontext_t *sigcontext )
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static struct fpsimd_context *get_fpsimd_context( const ucontext_t *sigcontext )
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{
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return (struct fpsimd_context *)get_extended_sigcontext( sigcontext, FPSIMD_MAGIC );
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}
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@ -324,50 +324,12 @@ NTSTATUS CDECL unwind_builtin_dll( ULONG type, DISPATCHER_CONTEXT *dispatch, CON
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}
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/***********************************************************************
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* save_context
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*
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* Set the register values from a sigcontext.
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*/
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static void save_context( CONTEXT *context, const ucontext_t *sigcontext )
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{
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DWORD i;
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context->ContextFlags = (CONTEXT_FULL & ~CONTEXT_FLOATING_POINT) |
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CONTEXT_ARM64;
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context->u.s.Fp = FP_sig(sigcontext); /* Frame pointer */
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context->u.s.Lr = LR_sig(sigcontext); /* Link register */
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context->Sp = SP_sig(sigcontext); /* Stack pointer */
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context->Pc = PC_sig(sigcontext); /* Program Counter */
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context->Cpsr = PSTATE_sig(sigcontext); /* Current State Register */
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for (i = 0; i <= 28; i++) context->u.X[i] = REGn_sig( i, sigcontext );
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}
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/***********************************************************************
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* restore_context
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*
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* Build a sigcontext from the register values.
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*/
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static void restore_context( const CONTEXT *context, ucontext_t *sigcontext )
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{
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DWORD i;
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FP_sig(sigcontext) = context->u.s.Fp; /* Frame pointer */
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LR_sig(sigcontext) = context->u.s.Lr; /* Link register */
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SP_sig(sigcontext) = context->Sp; /* Stack pointer */
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PC_sig(sigcontext) = context->Pc; /* Program Counter */
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PSTATE_sig(sigcontext) = context->Cpsr; /* Current State Register */
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for (i = 0; i <= 28; i++) REGn_sig( i, sigcontext ) = context->u.X[i];
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}
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/***********************************************************************
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* save_fpu
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*
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* Set the FPU context from a sigcontext.
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*/
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static void save_fpu( CONTEXT *context, ucontext_t *sigcontext )
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static void save_fpu( CONTEXT *context, const ucontext_t *sigcontext )
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{
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#ifdef linux
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struct fpsimd_context *fp = get_fpsimd_context( sigcontext );
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@ -391,23 +353,62 @@ static void save_fpu( CONTEXT *context, ucontext_t *sigcontext )
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*
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* Restore the FPU context to a sigcontext.
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*/
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static void restore_fpu( struct syscall_frame *frame, ucontext_t *sigcontext )
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static void restore_fpu( const CONTEXT *context, ucontext_t *sigcontext )
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{
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#ifdef linux
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struct fpsimd_context *fp = get_fpsimd_context( sigcontext );
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if (!fp) return;
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fp->fpcr = frame->fpcr;
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fp->fpsr = frame->fpsr;
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memcpy( fp->vregs, frame->v, sizeof(fp->vregs) );
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fp->fpcr = context->Fpcr;
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fp->fpsr = context->Fpsr;
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memcpy( fp->vregs, context->V, sizeof(fp->vregs) );
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#elif defined(__APPLE__)
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sigcontext->uc_mcontext->__ns.__fpcr = frame->fpcr;
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sigcontext->uc_mcontext->__ns.__fpsr = frame->fpsr;
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memcpy( sigcontext->uc_mcontext->__ns.__v, frame->v, sizeof(frame->v) );
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sigcontext->uc_mcontext->__ns.__fpcr = context->Fpcr;
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sigcontext->uc_mcontext->__ns.__fpsr = context->Fpsr;
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memcpy( sigcontext->uc_mcontext->__ns.__v, context->V, sizeof(context->v) );
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#endif
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}
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/***********************************************************************
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* save_context
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*
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* Set the register values from a sigcontext.
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*/
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static void save_context( CONTEXT *context, const ucontext_t *sigcontext )
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{
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DWORD i;
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context->ContextFlags = CONTEXT_FULL;
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context->u.s.Fp = FP_sig(sigcontext); /* Frame pointer */
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context->u.s.Lr = LR_sig(sigcontext); /* Link register */
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context->Sp = SP_sig(sigcontext); /* Stack pointer */
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context->Pc = PC_sig(sigcontext); /* Program Counter */
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context->Cpsr = PSTATE_sig(sigcontext); /* Current State Register */
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for (i = 0; i <= 28; i++) context->u.X[i] = REGn_sig( i, sigcontext );
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save_fpu( context, sigcontext );
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}
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/***********************************************************************
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* restore_context
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*
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* Build a sigcontext from the register values.
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*/
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static void restore_context( const CONTEXT *context, ucontext_t *sigcontext )
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{
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DWORD i;
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FP_sig(sigcontext) = context->u.s.Fp; /* Frame pointer */
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LR_sig(sigcontext) = context->u.s.Lr; /* Link register */
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SP_sig(sigcontext) = context->Sp; /* Stack pointer */
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PC_sig(sigcontext) = context->Pc; /* Program Counter */
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PSTATE_sig(sigcontext) = context->Cpsr; /* Current State Register */
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for (i = 0; i <= 28; i++) REGn_sig( i, sigcontext ) = context->u.X[i];
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restore_fpu( context, sigcontext );
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}
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/***********************************************************************
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* signal_set_full_context
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*/
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@ -632,7 +633,6 @@ static void setup_exception( ucontext_t *sigcontext, EXCEPTION_RECORD *rec )
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rec->ExceptionAddress = (void *)PC_sig(sigcontext);
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save_context( &context, sigcontext );
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save_fpu( &context, sigcontext );
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status = send_debug_event( rec, &context, TRUE );
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if (status == DBG_CONTINUE || status == DBG_EXCEPTION_HANDLED)
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@ -1056,7 +1056,22 @@ static void usr2_handler( int signal, siginfo_t *siginfo, void *sigcontext )
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PC_sig(context) = frame->pc;
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PSTATE_sig(context) = frame->cpsr;
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for (i = 0; i <= 28; i++) REGn_sig( i, context ) = frame->x[i];
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restore_fpu( frame, context );
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#ifdef linux
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{
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struct fpsimd_context *fp = get_fpsimd_context( sigcontext );
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if (fp)
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{
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fp->fpcr = frame->fpcr;
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fp->fpsr = frame->fpsr;
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memcpy( fp->vregs, frame->v, sizeof(fp->vregs) );
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}
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}
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#elif defined(__APPLE__)
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sigcontext->uc_mcontext->__ns.__fpcr = frame->fpcr;
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sigcontext->uc_mcontext->__ns.__fpsr = frame->fpsr;
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memcpy( sigcontext->uc_mcontext->__ns.__v, frame->v, sizeof(frame->v) );
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#endif
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}
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