1 /*
   2  * Copyright (c) 2013, 2019, 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/handles.inline.hpp"
  30 #include "runtime/sharedRuntime.hpp"
  31 #include "utilities/align.hpp"
  32 #include "vmreg_sparc.inline.hpp"
  33 
  34 jint CodeInstaller::pd_next_offset(NativeInstruction* inst, jint pc_offset, JVMCIObject method, JVMCI_TRAPS) {
  35   if (inst->is_call() || inst->is_jump()) {
  36     return pc_offset + NativeCall::instruction_size;
  37   } else if (inst->is_call_reg()) {
  38     return pc_offset + NativeCallReg::instruction_size;
  39   } else if (inst->is_sethi()) {
  40     return pc_offset + NativeFarCall::instruction_size;
  41   } else {
  42     JVMCI_ERROR_0("unsupported type of instruction for call site");
  43     return 0;
  44   }
  45 }
  46 
  47 void CodeInstaller::pd_patch_OopConstant(int pc_offset, JVMCIObject constant, JVMCI_TRAPS) {
  48   address pc = _instructions->start() + pc_offset;
  49   Handle obj = jvmci_env()->asConstant(constant, JVMCI_CHECK);
  50   jobject value = JNIHandles::make_local(obj());
  51   if (jvmci_env()->get_HotSpotObjectConstantImpl_compressed(constant)) {
  52     int oop_index = _oop_recorder->find_index(value);
  53     RelocationHolder rspec = oop_Relocation::spec(oop_index);
  54     _instructions->relocate(pc, rspec, 1);
  55   } else {
  56     NativeMovConstReg* move = nativeMovConstReg_at(pc);
  57     move->set_data((intptr_t) value);
  58 
  59     // We need two relocations:  one on the sethi and one on the add.
  60     int oop_index = _oop_recorder->find_index(value);
  61     RelocationHolder rspec = oop_Relocation::spec(oop_index);
  62     _instructions->relocate(pc + NativeMovConstReg::sethi_offset, rspec);
  63     _instructions->relocate(pc + NativeMovConstReg::add_offset, rspec);
  64   }
  65 }
  66 
  67 void CodeInstaller::pd_patch_MetaspaceConstant(int pc_offset, JVMCIObject constant, JVMCI_TRAPS) {
  68   address pc = _instructions->start() + pc_offset;
  69   if (jvmci_env()->get_HotSpotMetaspaceConstantImpl_compressed(constant)) {
  70     NativeMovConstReg32* move = nativeMovConstReg32_at(pc);
  71     narrowKlass narrowOop = record_narrow_metadata_reference(_instructions, pc, constant, JVMCI_CHECK);
  72     move->set_data((intptr_t)narrowOop);
  73     TRACE_jvmci_3("relocating (narrow metaspace constant) at " PTR_FORMAT "/0x%x", p2i(pc), narrowOop);
  74   } else {
  75     NativeMovConstReg* move = nativeMovConstReg_at(pc);
  76     void* reference = record_metadata_reference(_instructions, pc, constant, JVMCI_CHECK);
  77     move->set_data((intptr_t)reference);
  78     TRACE_jvmci_3("relocating (metaspace constant) at " PTR_FORMAT "/" PTR_FORMAT, p2i(pc), p2i(reference));
  79   }
  80 }
  81 
  82 void CodeInstaller::pd_patch_DataSectionReference(int pc_offset, int data_offset, JVMCI_TRAPS) {
  83   address pc = _instructions->start() + pc_offset;
  84   NativeInstruction* inst = nativeInstruction_at(pc);
  85   NativeInstruction* inst1 = nativeInstruction_at(pc + 4);
  86   if(inst->is_sethi() && inst1->is_nop()) {
  87       address const_start = _constants->start();
  88       address dest = _constants->start() + data_offset;
  89       if(_constants_size > 0) {
  90         _instructions->relocate(pc + NativeMovConstReg::sethi_offset, internal_word_Relocation::spec((address) dest));
  91         _instructions->relocate(pc + NativeMovConstReg::add_offset, internal_word_Relocation::spec((address) dest));
  92       }
  93       TRACE_jvmci_3("relocating at " PTR_FORMAT " (+%d) with destination at %d", p2i(pc), pc_offset, data_offset);
  94   }else {
  95     int const_size = align_up(_constants->end()-_constants->start(), CodeEntryAlignment);
  96     NativeMovRegMem* load = nativeMovRegMem_at(pc);
  97     // This offset must match with SPARCLoadConstantTableBaseOp.emitCode
  98     load->set_offset(- (const_size - data_offset + Assembler::min_simm13()));
  99     TRACE_jvmci_3("relocating ld at " PTR_FORMAT " (+%d) with destination at %d", p2i(pc), pc_offset, data_offset);
 100   }
 101 }
 102 
 103 void CodeInstaller::pd_relocate_ForeignCall(NativeInstruction* inst, jlong foreign_call_destination, JVMCI_TRAPS) {
 104   address pc = (address) inst;
 105   if (inst->is_call()) {
 106     NativeCall* call = nativeCall_at(pc);
 107     call->set_destination((address) foreign_call_destination);
 108     _instructions->relocate(call->instruction_address(), runtime_call_Relocation::spec());
 109   } else if (inst->is_sethi()) {
 110     NativeJump* jump = nativeJump_at(pc);
 111     jump->set_jump_destination((address) foreign_call_destination);
 112     _instructions->relocate(jump->instruction_address(), runtime_call_Relocation::spec());
 113   } else {
 114     JVMCI_ERROR("unknown call or jump instruction at " PTR_FORMAT, p2i(pc));
 115   }
 116   TRACE_jvmci_3("relocating (foreign call) at " PTR_FORMAT, p2i(inst));
 117 }
 118 
 119 void CodeInstaller::pd_relocate_JavaMethod(CodeBuffer &, JVMCIObject hotspot_method, jint pc_offset, JVMCI_TRAPS) {
 120 #ifdef ASSERT
 121   Method* method = NULL;
 122   // we need to check, this might also be an unresolved method
 123   if (JVMCIENV->isa_HotSpotResolvedJavaMethodImpl(hotspot_method)) {
 124     method = JVMCIENV->asMethod(hotspot_method);
 125   }
 126 #endif
 127   switch (_next_call_type) {
 128     case INLINE_INVOKE:
 129       break;
 130     case INVOKEVIRTUAL:
 131     case INVOKEINTERFACE: {
 132       assert(method == NULL || !method->is_static(), "cannot call static method with invokeinterface");
 133       NativeCall* call = nativeCall_at(_instructions->start() + pc_offset);
 134       call->set_destination(SharedRuntime::get_resolve_virtual_call_stub());
 135       _instructions->relocate(call->instruction_address(), virtual_call_Relocation::spec(_invoke_mark_pc));
 136       break;
 137     }
 138     case INVOKESTATIC: {
 139       assert(method == NULL || method->is_static(), "cannot call non-static method with invokestatic");
 140       NativeCall* call = nativeCall_at(_instructions->start() + pc_offset);
 141       call->set_destination(SharedRuntime::get_resolve_static_call_stub());
 142       _instructions->relocate(call->instruction_address(), relocInfo::static_call_type);
 143       break;
 144     }
 145     case INVOKESPECIAL: {
 146       assert(method == NULL || !method->is_static(), "cannot call static method with invokespecial");
 147       NativeCall* call = nativeCall_at(_instructions->start() + pc_offset);
 148       call->set_destination(SharedRuntime::get_resolve_opt_virtual_call_stub());
 149       _instructions->relocate(call->instruction_address(), relocInfo::opt_virtual_call_type);
 150       break;
 151     }
 152     default:
 153       JVMCI_ERROR("invalid _next_call_type value");
 154       break;
 155   }
 156 }
 157 
 158 void CodeInstaller::pd_relocate_poll(address pc, jint mark, JVMCI_TRAPS) {
 159   switch (mark) {
 160     case POLL_NEAR:
 161       JVMCI_ERROR("unimplemented");
 162       break;
 163     case POLL_FAR:
 164       _instructions->relocate(pc, relocInfo::poll_type);
 165       break;
 166     case POLL_RETURN_NEAR:
 167       JVMCI_ERROR("unimplemented");
 168       break;
 169     case POLL_RETURN_FAR:
 170       _instructions->relocate(pc, relocInfo::poll_return_type);
 171       break;
 172     default:
 173       JVMCI_ERROR("invalid mark value");
 174       break;
 175   }
 176 }
 177 
 178 // convert JVMCI register indices (as used in oop maps) to HotSpot registers
 179 VMReg CodeInstaller::get_hotspot_reg(jint jvmci_reg, JVMCI_TRAPS) {
 180   // JVMCI Registers are numbered as follows:
 181   //   0..31: Thirty-two General Purpose registers (CPU Registers)
 182   //   32..63: Thirty-two single precision float registers
 183   //   64..95: Thirty-two double precision float registers
 184   //   96..111: Sixteen quad precision float registers
 185   if (jvmci_reg < 32) {
 186     return as_Register(jvmci_reg)->as_VMReg();
 187   } else {
 188     jint floatRegisterNumber;
 189     if(jvmci_reg < 64) { // Single precision
 190       floatRegisterNumber = jvmci_reg - 32;
 191     } else if(jvmci_reg < 96) {
 192       floatRegisterNumber = 2 * (jvmci_reg - 64);
 193     } else if(jvmci_reg < 112) {
 194       floatRegisterNumber = 4 * (jvmci_reg - 96);
 195     } else {
 196       JVMCI_ERROR_NULL("invalid register number: %d", jvmci_reg);
 197     }
 198     return as_FloatRegister(floatRegisterNumber)->as_VMReg();
 199   }
 200 }
 201 
 202 bool CodeInstaller::is_general_purpose_reg(VMReg hotspotRegister) {
 203   return !hotspotRegister->is_FloatRegister();
 204 }