1 /* 2 * Copyright (c) 1998, 2018, 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 25 #include "precompiled.hpp" 26 #include "asm/macroAssembler.inline.hpp" 27 #include "code/relocInfo.hpp" 28 #include "nativeInst_sparc.hpp" 29 #include "oops/compressedOops.inline.hpp" 30 #include "oops/klass.inline.hpp" 31 #include "oops/oop.hpp" 32 #include "runtime/safepoint.hpp" 33 34 void Relocation::pd_set_data_value(address x, intptr_t o, bool verify_only) { 35 NativeInstruction* ip = nativeInstruction_at(addr()); 36 jint inst = ip->long_at(0); 37 assert(inst != NativeInstruction::illegal_instruction(), "no breakpoint"); 38 switch (Assembler::inv_op(inst)) { 39 40 case Assembler::ldst_op: 41 #ifdef ASSERT 42 switch (Assembler::inv_op3(inst)) { 43 case Assembler::lduw_op3: 44 case Assembler::ldub_op3: 45 case Assembler::lduh_op3: 46 case Assembler::ldd_op3: 47 case Assembler::ldsw_op3: 48 case Assembler::ldsb_op3: 49 case Assembler::ldsh_op3: 50 case Assembler::ldx_op3: 51 case Assembler::ldf_op3: 52 case Assembler::lddf_op3: 53 case Assembler::stw_op3: 54 case Assembler::stb_op3: 55 case Assembler::sth_op3: 56 case Assembler::std_op3: 57 case Assembler::stx_op3: 58 case Assembler::stf_op3: 59 case Assembler::stdf_op3: 60 case Assembler::casa_op3: 61 case Assembler::casxa_op3: 62 break; 63 default: 64 ShouldNotReachHere(); 65 } 66 goto do_non_sethi; 67 #endif 68 69 case Assembler::arith_op: 70 #ifdef ASSERT 71 switch (Assembler::inv_op3(inst)) { 72 case Assembler::or_op3: 73 case Assembler::add_op3: 74 case Assembler::jmpl_op3: 75 break; 76 default: 77 ShouldNotReachHere(); 78 } 79 do_non_sethi:; 80 #endif 81 { 82 guarantee(Assembler::inv_immed(inst), "must have a simm13 field"); 83 int simm13 = Assembler::low10((intptr_t)x) + o; 84 guarantee(Assembler::is_simm13(simm13), "offset can't overflow simm13"); 85 inst &= ~Assembler::simm( -1, 13); 86 inst |= Assembler::simm(simm13, 13); 87 if (verify_only) { 88 guarantee(ip->long_at(0) == inst, "instructions must match"); 89 } else { 90 ip->set_long_at(0, inst); 91 } 92 } 93 break; 94 95 case Assembler::branch_op: 96 { 97 jint inst2; 98 guarantee(Assembler::inv_op2(inst)==Assembler::sethi_op2, "must be sethi"); 99 if (format() != 0) { 100 assert(type() == relocInfo::oop_type || type() == relocInfo::metadata_type, "only narrow oops or klasses case"); 101 jint np = type() == relocInfo::oop_type ? CompressedOops::encode((oop)x) : CompressedKlassPointers::encode((Klass*)x); 102 inst &= ~Assembler::hi22(-1); 103 inst |= Assembler::hi22((intptr_t)np); 104 if (verify_only) { 105 guarantee(ip->long_at(0) == inst, "instructions must match"); 106 } else { 107 ip->set_long_at(0, inst); 108 } 109 inst2 = ip->long_at( NativeInstruction::nop_instruction_size ); 110 guarantee(Assembler::inv_op(inst2)==Assembler::arith_op, "arith op"); 111 if (verify_only) { 112 guarantee(ip->long_at(NativeInstruction::nop_instruction_size) == NativeInstruction::set_data32_simm13( inst2, (intptr_t)np), 113 "instructions must match"); 114 } else { 115 ip->set_long_at(NativeInstruction::nop_instruction_size, NativeInstruction::set_data32_simm13( inst2, (intptr_t)np)); 116 } 117 break; 118 } 119 if (verify_only) { 120 ip->verify_data64_sethi( ip->addr_at(0), (intptr_t)x ); 121 } else { 122 ip->set_data64_sethi( ip->addr_at(0), (intptr_t)x ); 123 } 124 } 125 break; 126 127 default: 128 guarantee(false, "instruction must perform arithmetic or memory access"); 129 } 130 } 131 132 133 address Relocation::pd_call_destination(address orig_addr) { 134 intptr_t adj = 0; 135 if (orig_addr != NULL) { 136 // We just moved this call instruction from orig_addr to addr(). 137 // This means its target will appear to have grown by addr() - orig_addr. 138 adj = -( addr() - orig_addr ); 139 } 140 if (NativeCall::is_call_at(addr())) { 141 NativeCall* call = nativeCall_at(addr()); 142 return call->destination() + adj; 143 } 144 if (NativeFarCall::is_call_at(addr())) { 145 NativeFarCall* call = nativeFarCall_at(addr()); 146 return call->destination() + adj; 147 } 148 // Special case: Patchable branch local to the code cache. 149 // This will break badly if the code cache grows larger than a few Mb. 150 NativeGeneralJump* br = nativeGeneralJump_at(addr()); 151 return br->jump_destination() + adj; 152 } 153 154 155 void Relocation::pd_set_call_destination(address x) { 156 if (NativeCall::is_call_at(addr())) { 157 NativeCall* call = nativeCall_at(addr()); 158 call->set_destination(x); 159 return; 160 } 161 if (NativeFarCall::is_call_at(addr())) { 162 NativeFarCall* call = nativeFarCall_at(addr()); 163 call->set_destination(x); 164 return; 165 } 166 // Special case: Patchable branch local to the code cache. 167 // This will break badly if the code cache grows larger than a few Mb. 168 NativeGeneralJump* br = nativeGeneralJump_at(addr()); 169 br->set_jump_destination(x); 170 } 171 172 173 address* Relocation::pd_address_in_code() { 174 // SPARC never embeds addresses in code, at present. 175 //assert(type() == relocInfo::oop_type, "only oops are inlined at present"); 176 return (address*)addr(); 177 } 178 179 180 address Relocation::pd_get_address_from_code() { 181 // SPARC never embeds addresses in code, at present. 182 //assert(type() == relocInfo::oop_type, "only oops are inlined at present"); 183 return *(address*)addr(); 184 } 185 186 void poll_Relocation::fix_relocation_after_move(const CodeBuffer* src, CodeBuffer* dest) { 187 } 188 189 void metadata_Relocation::pd_fix_value(address x) { 190 }