1 /* 2 * Copyright (c) 1998, 2013, 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/assembler.hpp" 27 #include "code/relocInfo.hpp" 28 #include "nativeInst_sparc.hpp" 29 #include "oops/klass.inline.hpp" 30 #include "oops/oop.inline.hpp" 31 #include "runtime/safepoint.hpp" 32 33 void Relocation::pd_set_data_value(address x, intptr_t o, bool verify_only) { 34 NativeInstruction* ip = nativeInstruction_at(addr()); 35 jint inst = ip->long_at(0); 36 assert(inst != NativeInstruction::illegal_instruction(), "no breakpoint"); 37 switch (Assembler::inv_op(inst)) { 38 39 case Assembler::ldst_op: 40 #ifdef ASSERT 41 switch (Assembler::inv_op3(inst)) { 42 case Assembler::lduw_op3: 43 case Assembler::ldub_op3: 44 case Assembler::lduh_op3: 45 case Assembler::ldd_op3: 46 case Assembler::ldsw_op3: 47 case Assembler::ldsb_op3: 48 case Assembler::ldsh_op3: 49 case Assembler::ldx_op3: 50 case Assembler::ldf_op3: 51 case Assembler::lddf_op3: 52 case Assembler::stw_op3: 53 case Assembler::stb_op3: 54 case Assembler::sth_op3: 55 case Assembler::std_op3: 56 case Assembler::stx_op3: 57 case Assembler::stf_op3: 58 case Assembler::stdf_op3: 59 case Assembler::casa_op3: 60 case Assembler::casxa_op3: 61 break; 62 default: 63 ShouldNotReachHere(); 64 } 65 goto do_non_sethi; 66 #endif 67 68 case Assembler::arith_op: 69 #ifdef ASSERT 70 switch (Assembler::inv_op3(inst)) { 71 case Assembler::or_op3: 72 case Assembler::add_op3: 73 case Assembler::jmpl_op3: 74 break; 75 default: 76 ShouldNotReachHere(); 77 } 78 do_non_sethi:; 79 #endif 80 { 81 guarantee(Assembler::inv_immed(inst), "must have a simm13 field"); 82 int simm13 = Assembler::low10((intptr_t)x) + o; 83 guarantee(Assembler::is_simm13(simm13), "offset can't overflow simm13"); 84 inst &= ~Assembler::simm( -1, 13); 85 inst |= Assembler::simm(simm13, 13); 86 if (verify_only) { 87 assert(ip->long_at(0) == inst, "instructions must match"); 88 } else { 89 ip->set_long_at(0, inst); 90 } 91 } 92 break; 93 94 case Assembler::branch_op: 95 { 96 #ifdef _LP64 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 ? oopDesc::encode_heap_oop((oop)x) : Klass::encode_klass((Klass*)x); 102 inst &= ~Assembler::hi22(-1); 103 inst |= Assembler::hi22((intptr_t)np); 104 if (verify_only) { 105 assert(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 assert(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 #else 125 guarantee(Assembler::inv_op2(inst)==Assembler::sethi_op2, "must be sethi"); 126 inst &= ~Assembler::hi22( -1); 127 inst |= Assembler::hi22((intptr_t)x); 128 // (ignore offset; it doesn't play into the sethi) 129 if (verify_only) { 130 assert(ip->long_at(0) == inst, "instructions must match"); 131 } else { 132 ip->set_long_at(0, inst); 133 } 134 #endif 135 } 136 break; 137 138 default: 139 guarantee(false, "instruction must perform arithmetic or memory access"); 140 } 141 } 142 143 144 address Relocation::pd_call_destination(address orig_addr) { 145 intptr_t adj = 0; 146 if (orig_addr != NULL) { 147 // We just moved this call instruction from orig_addr to addr(). 148 // This means its target will appear to have grown by addr() - orig_addr. 149 adj = -( addr() - orig_addr ); 150 } 151 if (NativeCall::is_call_at(addr())) { 152 NativeCall* call = nativeCall_at(addr()); 153 return call->destination() + adj; 154 } 155 if (NativeFarCall::is_call_at(addr())) { 156 NativeFarCall* call = nativeFarCall_at(addr()); 157 return call->destination() + adj; 158 } 159 // Special case: Patchable branch local to the code cache. 160 // This will break badly if the code cache grows larger than a few Mb. 161 NativeGeneralJump* br = nativeGeneralJump_at(addr()); 162 return br->jump_destination() + adj; 163 } 164 165 166 void Relocation::pd_set_call_destination(address x) { 167 if (NativeCall::is_call_at(addr())) { 168 NativeCall* call = nativeCall_at(addr()); 169 call->set_destination(x); 170 return; 171 } 172 if (NativeFarCall::is_call_at(addr())) { 173 NativeFarCall* call = nativeFarCall_at(addr()); 174 call->set_destination(x); 175 return; 176 } 177 // Special case: Patchable branch local to the code cache. 178 // This will break badly if the code cache grows larger than a few Mb. 179 NativeGeneralJump* br = nativeGeneralJump_at(addr()); 180 br->set_jump_destination(x); 181 } 182 183 184 address* Relocation::pd_address_in_code() { 185 // SPARC never embeds addresses in code, at present. 186 //assert(type() == relocInfo::oop_type, "only oops are inlined at present"); 187 return (address*)addr(); 188 } 189 190 191 address Relocation::pd_get_address_from_code() { 192 // SPARC never embeds addresses in code, at present. 193 //assert(type() == relocInfo::oop_type, "only oops are inlined at present"); 194 return *(address*)addr(); 195 } 196 197 void poll_Relocation::fix_relocation_after_move(const CodeBuffer* src, CodeBuffer* dest) { 198 } 199 200 void poll_return_Relocation::fix_relocation_after_move(const CodeBuffer* src, CodeBuffer* dest) { 201 } 202 203 void metadata_Relocation::pd_fix_value(address x) { 204 }