1 /*
2 * Copyright (c) 2015, 2016, Oracle and/or its affiliates. All rights reserved.
3 * DO NOT ALTER OR REMOVE COPYRIGHT NOTICES OR THIS FILE HEADER.
4 *
5 * This code is free software; you can redistribute it and/or modify it
6 * under the terms of the GNU General Public License version 2 only, as
7 * published by the Free Software Foundation.
8 *
9 * This code is distributed in the hope that it will be useful, but WITHOUT
10 * ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or
11 * FITNESS FOR A PARTICULAR PURPOSE. See the GNU General Public License
12 * version 2 for more details (a copy is included in the LICENSE file that
13 * accompanied this code).
14 *
15 * You should have received a copy of the GNU General Public License version
16 * 2 along with this work; if not, write to the Free Software Foundation,
17 * Inc., 51 Franklin St, Fifth Floor, Boston, MA 02110-1301 USA.
18 *
19 * Please contact Oracle, 500 Oracle Parkway, Redwood Shores, CA 94065 USA
20 * or visit www.oracle.com if you need additional information or have any
21 * questions.
22 */
23
24 #include "jvmci/jvmciCodeInstaller.hpp"
25 #include "jvmci/jvmciRuntime.hpp"
26 #include "jvmci/jvmciCompilerToVM.hpp"
27 #include "jvmci/jvmciJavaClasses.hpp"
28 #include "oops/oop.inline.hpp"
29 #include "runtime/sharedRuntime.hpp"
30 #include "vmreg_aarch64.inline.hpp"
31
32 jint CodeInstaller::pd_next_offset(NativeInstruction* inst, jint pc_offset, Handle method, TRAPS) {
33 if (inst->is_call() || inst->is_jump() || inst->is_blr()) {
34 return pc_offset + NativeCall::instruction_size;
35 } else if (inst->is_general_jump()) {
36 return pc_offset + NativeGeneralJump::instruction_size;
37 } else {
38 JVMCI_ERROR_0("unsupported type of instruction for call site");
39 }
40 }
41
42 void CodeInstaller::pd_patch_OopConstant(int pc_offset, Handle constant, TRAPS) {
43 address pc = _instructions->start() + pc_offset;
44 Handle obj = HotSpotObjectConstantImpl::object(constant);
45 jobject value = JNIHandles::make_local(obj());
46 MacroAssembler::patch_oop(pc, (address)obj());
47 int oop_index = _oop_recorder->find_index(value);
48 RelocationHolder rspec = oop_Relocation::spec(oop_index);
49 _instructions->relocate(pc, rspec);
50 }
51
52 void CodeInstaller::pd_patch_MetaspaceConstant(int pc_offset, Handle constant, TRAPS) {
53 address pc = _instructions->start() + pc_offset;
54 if (HotSpotMetaspaceConstantImpl::compressed(constant)) {
55 narrowKlass narrowOop = record_narrow_metadata_reference(_instructions, pc, constant, CHECK);
56 MacroAssembler::patch_narrow_klass(pc, narrowOop);
57 TRACE_jvmci_3("relocating (narrow metaspace constant) at " PTR_FORMAT "/0x%x", p2i(pc), narrowOop);
58 } else {
59 NativeMovConstReg* move = nativeMovConstReg_at(pc);
60 void* reference = record_metadata_reference(_instructions, pc, constant, CHECK);
61 move->set_data((intptr_t) reference);
62 TRACE_jvmci_3("relocating (metaspace constant) at " PTR_FORMAT "/" PTR_FORMAT, p2i(pc), p2i(reference));
63 }
64 }
65
66 void CodeInstaller::pd_patch_DataSectionReference(int pc_offset, int data_offset, TRAPS) {
67 address pc = _instructions->start() + pc_offset;
68 NativeInstruction* inst = nativeInstruction_at(pc);
69 if (inst->is_adr_aligned() || inst->is_ldr_literal()) {
70 address dest = _constants->start() + data_offset;
71 _instructions->relocate(pc, section_word_Relocation::spec((address) dest, CodeBuffer::SECT_CONSTS));
72 TRACE_jvmci_3("relocating at " PTR_FORMAT " (+%d) with destination at %d", p2i(pc), pc_offset, data_offset);
73 } else {
74 JVMCI_ERROR("unknown load or move instruction at " PTR_FORMAT, p2i(pc));
75 }
76 }
77
78 void CodeInstaller::pd_relocate_ForeignCall(NativeInstruction* inst, jlong foreign_call_destination, TRAPS) {
79 address pc = (address) inst;
80 if (inst->is_call()) {
81 NativeCall* call = nativeCall_at(pc);
82 call->set_destination((address) foreign_call_destination);
83 _instructions->relocate(call->instruction_address(), runtime_call_Relocation::spec());
84 } else if (inst->is_jump()) {
85 NativeJump* jump = nativeJump_at(pc);
86 jump->set_jump_destination((address) foreign_call_destination);
87 _instructions->relocate(jump->instruction_address(), runtime_call_Relocation::spec());
88 } else if (inst->is_general_jump()) {
89 NativeGeneralJump* jump = nativeGeneralJump_at(pc);
90 jump->set_jump_destination((address) foreign_call_destination);
91 _instructions->relocate(jump->instruction_address(), runtime_call_Relocation::spec());
92 } else {
93 JVMCI_ERROR("unknown call or jump instruction at " PTR_FORMAT, p2i(pc));
94 }
95 TRACE_jvmci_3("relocating (foreign call) at " PTR_FORMAT, p2i(inst));
96 }
97
98 void CodeInstaller::pd_relocate_JavaMethod(Handle hotspot_method, jint pc_offset, TRAPS) {
99 #ifdef ASSERT
100 Method* method = NULL;
101 // we need to check, this might also be an unresolved method
102 if (hotspot_method->is_a(HotSpotResolvedJavaMethodImpl::klass())) {
103 method = getMethodFromHotSpotMethod(hotspot_method());
104 }
105 #endif
106 switch (_next_call_type) {
107 case INLINE_INVOKE:
108 break;
109 case INVOKEVIRTUAL:
110 case INVOKEINTERFACE: {
111 assert(method == NULL || !method->is_static(), "cannot call static method with invokeinterface");
112 NativeCall* call = nativeCall_at(_instructions->start() + pc_offset);
113 call->set_destination(SharedRuntime::get_resolve_virtual_call_stub());
114 _instructions->relocate(call->instruction_address(), virtual_call_Relocation::spec(_invoke_mark_pc));
115 break;
116 }
117 case INVOKESTATIC: {
118 assert(method == NULL || method->is_static(), "cannot call non-static method with invokestatic");
119 NativeCall* call = nativeCall_at(_instructions->start() + pc_offset);
120 call->set_destination(SharedRuntime::get_resolve_static_call_stub());
121 _instructions->relocate(call->instruction_address(), relocInfo::static_call_type);
122 break;
123 }
124 case INVOKESPECIAL: {
125 assert(method == NULL || !method->is_static(), "cannot call static method with invokespecial");
126 NativeCall* call = nativeCall_at(_instructions->start() + pc_offset);
127 call->set_destination(SharedRuntime::get_resolve_opt_virtual_call_stub());
128 _instructions->relocate(call->instruction_address(), relocInfo::opt_virtual_call_type);
129 break;
130 }
131 default:
132 JVMCI_ERROR("invalid _next_call_type value");
133 break;
134 }
135 }
136
137 void CodeInstaller::pd_relocate_poll(address pc, jint mark, TRAPS) {
138 switch (mark) {
139 case POLL_NEAR:
140 JVMCI_ERROR("unimplemented");
141 break;
142 case POLL_FAR:
143 _instructions->relocate(pc, relocInfo::poll_type);
144 break;
145 case POLL_RETURN_NEAR:
146 JVMCI_ERROR("unimplemented");
147 break;
148 case POLL_RETURN_FAR:
149 _instructions->relocate(pc, relocInfo::poll_return_type);
150 break;
151 default:
152 JVMCI_ERROR("invalid mark value");
153 break;
154 }
155 }
156
157 // convert JVMCI register indices (as used in oop maps) to HotSpot registers
158 VMReg CodeInstaller::get_hotspot_reg(jint jvmci_reg, TRAPS) {
159 if (jvmci_reg < RegisterImpl::number_of_registers) {
160 return as_Register(jvmci_reg)->as_VMReg();
161 } else {
162 jint floatRegisterNumber = jvmci_reg - RegisterImpl::number_of_registers_for_jvmci;
163 if (floatRegisterNumber >= 0 && floatRegisterNumber < FloatRegisterImpl::number_of_registers) {
164 return as_FloatRegister(floatRegisterNumber)->as_VMReg();
165 }
166 JVMCI_ERROR_NULL("invalid register number: %d", jvmci_reg);
167 }
168 }
169
170 bool CodeInstaller::is_general_purpose_reg(VMReg hotspotRegister) {
171 return !hotspotRegister->is_FloatRegister();
172 }