Esempio n. 1
0
gpointer
mono_arch_create_rgctx_lazy_fetch_trampoline (guint32 slot, MonoTrampInfo **info,
                                              gboolean aot)
{
	if (aot)
		NOT_IMPLEMENTED;

	gboolean is_mrgctx = MONO_RGCTX_SLOT_IS_MRGCTX (slot);
	int index = MONO_RGCTX_SLOT_INDEX (slot);

	if (is_mrgctx)
		index += MONO_SIZEOF_METHOD_RUNTIME_GENERIC_CONTEXT / sizeof (target_mgreg_t);

	int depth;

	for (depth = 0; ; depth++) {
		int size = mono_class_rgctx_get_array_size (depth, is_mrgctx);

		if (index < size - 1)
			break;

		index -= size - 1;
	}

	guint8 *buf = mono_global_codeman_reserve (128 * depth), *code = buf;
	guint8 **null_jumps = g_malloc0 (sizeof (guint8 *) * (depth + 2));

	if (!is_mrgctx) {
	} else
		riscv_addi (code, RISCV_T1, RISCV_A0, 0);

	mono_arch_flush_icache (buf, code - buf);

	if (info) {
		char *name = mono_get_rgctx_fetch_trampoline_name (slot);
		*info = mono_tramp_info_create (name, buf, code - buf, NULL, NULL);
		g_free (name);
	}

	return buf;
}
Esempio n. 2
0
gpointer
mono_arch_create_rgctx_lazy_fetch_trampoline (guint32 slot, MonoTrampInfo **info, gboolean aot)
{
#ifdef MONO_ARCH_VTABLE_REG
	guint8 *tramp;
	guint8 *code, *buf;
	guint8 **rgctx_null_jumps;
	gint32 displace;
	int tramp_size,
	    depth, 
	    index, 
	    iPatch = 0,
	    i;
	gboolean mrgctx;
	MonoJumpInfo *ji = NULL;
	GSList *unwind_ops = NULL;

	mrgctx = MONO_RGCTX_SLOT_IS_MRGCTX (slot);
	index = MONO_RGCTX_SLOT_INDEX (slot);
	if (mrgctx)
		index += MONO_SIZEOF_METHOD_RUNTIME_GENERIC_CONTEXT / sizeof (gpointer);
	for (depth = 0; ; ++depth) {
		int size = mono_class_rgctx_get_array_size (depth, mrgctx);

		if (index < size - 1)
			break;
		index -= size - 1;
	}

	tramp_size = 48 + 16 * depth;
	if (mrgctx)
		tramp_size += 4;
	else
		tramp_size += 12;

	code = buf = mono_global_codeman_reserve (tramp_size);

	unwind_ops = mono_arch_get_cie_program ();

	rgctx_null_jumps = g_malloc (sizeof (guint8*) * (depth + 2));

	if (mrgctx) {
		/* get mrgctx ptr */
		s390_lgr (code, s390_r1, s390_r2);
	} else {
		/* load rgctx ptr from vtable */
		s390_lg (code, s390_r1, 0, s390_r2, G_STRUCT_OFFSET(MonoVTable, runtime_generic_context));
		/* is the rgctx ptr null? */
		s390_ltgr (code, s390_r1, s390_r1);
		/* if yes, jump to actual trampoline */
		rgctx_null_jumps [iPatch++] = code;
		s390_jge (code, 0);
	}

	for (i = 0; i < depth; ++i) {
		/* load ptr to next array */
		if (mrgctx && i == 0)
			s390_lg (code, s390_r1, 0, s390_r1, MONO_SIZEOF_METHOD_RUNTIME_GENERIC_CONTEXT);
		else
			s390_lg (code, s390_r1, 0, s390_r1, 0);
		s390_ltgr (code, s390_r1, s390_r1);
		/* if the ptr is null then jump to actual trampoline */
		rgctx_null_jumps [iPatch++] = code;
		s390_jge (code, 0);
	}

	/* fetch slot */
	s390_lg (code, s390_r1, 0, s390_r1, (sizeof (gpointer) * (index  + 1)));
	/* is the slot null? */
	s390_ltgr (code, s390_r1, s390_r1);
	/* if yes, jump to actual trampoline */
	rgctx_null_jumps [iPatch++] = code;
	s390_jge (code, 0);
	/* otherwise return r1 */
	s390_lgr (code, s390_r2, s390_r1);
	s390_br  (code, s390_r14);

	for (i = 0; i < iPatch; i++) {
		displace = ((uintptr_t) code - (uintptr_t) rgctx_null_jumps[i]) / 2;
		s390_patch_rel ((rgctx_null_jumps [i] + 2), displace);
	}

	g_free (rgctx_null_jumps);

	/* move the rgctx pointer to the VTABLE register */
	s390_lgr (code, MONO_ARCH_VTABLE_REG, s390_r2);

	tramp = mono_arch_create_specific_trampoline (GUINT_TO_POINTER (slot),
		MONO_TRAMPOLINE_RGCTX_LAZY_FETCH, mono_get_root_domain (), NULL);

	/* jump to the actual trampoline */
	displace = (tramp - code) / 2;
	s390_jg (code, displace);

	mono_arch_flush_icache (buf, code - buf);

	g_assert (code - buf <= tramp_size);

	if (info) {
		char *name = mono_get_rgctx_fetch_trampoline_name (slot);
		*info = mono_tramp_info_create (name, buf, code - buf, ji, unwind_ops);
		g_free (name);
	}

	return(buf);
#else
	g_assert_not_reached ();
#endif
	return(NULL);
}	
Esempio n. 3
0
gpointer
mono_arch_create_rgctx_lazy_fetch_trampoline (guint32 slot, MonoTrampInfo **info, gboolean aot)
{
	guint8 *tramp;
	guint8 *code, *buf;
	guint8 **rgctx_null_jumps;
	int tramp_size;
	int depth, index;
	int i;
	gboolean mrgctx;
	MonoJumpInfo *ji = NULL;
	GSList *unwind_ops = NULL;

	unwind_ops = mono_arch_get_cie_program ();

	mrgctx = MONO_RGCTX_SLOT_IS_MRGCTX (slot);
	index = MONO_RGCTX_SLOT_INDEX (slot);
	if (mrgctx)
		index += MONO_SIZEOF_METHOD_RUNTIME_GENERIC_CONTEXT / sizeof (target_mgreg_t);
	for (depth = 0; ; ++depth) {
		int size = mono_class_rgctx_get_array_size (depth, mrgctx);

		if (index < size - 1)
			break;
		index -= size - 1;
	}

	tramp_size = (aot ? 64 : 36) + 6 * depth;

	code = buf = mono_global_codeman_reserve (tramp_size);

	rgctx_null_jumps = g_malloc (sizeof (guint8*) * (depth + 2));

	/* load vtable/mrgctx ptr */
	x86_mov_reg_membase (code, X86_EAX, X86_ESP, 4, 4);
	if (!mrgctx) {
		/* load rgctx ptr from vtable */
		x86_mov_reg_membase (code, X86_EAX, X86_EAX, MONO_STRUCT_OFFSET (MonoVTable, runtime_generic_context), 4);
		/* is the rgctx ptr null? */
		x86_test_reg_reg (code, X86_EAX, X86_EAX);
		/* if yes, jump to actual trampoline */
		rgctx_null_jumps [0] = code;
		x86_branch8 (code, X86_CC_Z, -1, 1);
	}

	for (i = 0; i < depth; ++i) {
		/* load ptr to next array */
		if (mrgctx && i == 0)
			x86_mov_reg_membase (code, X86_EAX, X86_EAX, MONO_SIZEOF_METHOD_RUNTIME_GENERIC_CONTEXT, 4);
		else
			x86_mov_reg_membase (code, X86_EAX, X86_EAX, 0, 4);
		/* is the ptr null? */
		x86_test_reg_reg (code, X86_EAX, X86_EAX);
		/* if yes, jump to actual trampoline */
		rgctx_null_jumps [i + 1] = code;
		x86_branch8 (code, X86_CC_Z, -1, 1);
	}

	/* fetch slot */
	x86_mov_reg_membase (code, X86_EAX, X86_EAX, sizeof (target_mgreg_t) * (index + 1), 4);
	/* is the slot null? */
	x86_test_reg_reg (code, X86_EAX, X86_EAX);
	/* if yes, jump to actual trampoline */
	rgctx_null_jumps [depth + 1] = code;
	x86_branch8 (code, X86_CC_Z, -1, 1);
	/* otherwise return */
	x86_ret (code);

	for (i = mrgctx ? 1 : 0; i <= depth + 1; ++i)
		x86_patch (rgctx_null_jumps [i], code);

	g_free (rgctx_null_jumps);

	x86_mov_reg_membase (code, MONO_ARCH_VTABLE_REG, X86_ESP, 4, 4);

	if (aot) {
		code = mono_arch_emit_load_aotconst (buf, code, &ji, MONO_PATCH_INFO_SPECIFIC_TRAMPOLINE_LAZY_FETCH_ADDR, GUINT_TO_POINTER (slot));
		x86_jump_reg (code, X86_EAX);
	} else {
		tramp = (guint8*)mono_arch_create_specific_trampoline (GUINT_TO_POINTER (slot), MONO_TRAMPOLINE_RGCTX_LAZY_FETCH, mono_get_root_domain (), NULL);

		/* jump to the actual trampoline */
		x86_jump_code (code, tramp);
	}

	mono_arch_flush_icache (buf, code - buf);
	MONO_PROFILER_RAISE (jit_code_buffer, (buf, code - buf, MONO_PROFILER_CODE_BUFFER_GENERICS_TRAMPOLINE, NULL));

	g_assert (code - buf <= tramp_size);

	char *name = mono_get_rgctx_fetch_trampoline_name (slot);
	*info = mono_tramp_info_create (name, buf, code - buf, ji, unwind_ops);
	g_free (name);

	return buf;
}