1 /* 2 * Copyright (c) 2000, 2013, Oracle and/or its affiliates. All rights reserved. 3 * Copyright 2012, 2013 SAP AG. All rights reserved. 4 * DO NOT ALTER OR REMOVE COPYRIGHT NOTICES OR THIS FILE HEADER. 5 * 6 * This code is free software; you can redistribute it and/or modify it 7 * under the terms of the GNU General Public License version 2 only, as 8 * published by the Free Software Foundation. 9 * 10 * This code is distributed in the hope that it will be useful, but WITHOUT 11 * ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or 12 * FITNESS FOR A PARTICULAR PURPOSE. See the GNU General Public License 13 * version 2 for more details (a copy is included in the LICENSE file that 14 * accompanied this code). 15 * 16 * You should have received a copy of the GNU General Public License version 17 * 2 along with this work; if not, write to the Free Software Foundation, 18 * Inc., 51 Franklin St, Fifth Floor, Boston, MA 02110-1301 USA. 19 * 20 * Please contact Oracle, 500 Oracle Parkway, Redwood Shores, CA 94065 USA 21 * or visit www.oracle.com if you need additional information or have any 22 * questions. 23 * 24 */ 25 26 #include "precompiled.hpp" 27 #include "asm/assembler.inline.hpp" 28 #include "assembler_ppc.inline.hpp" 29 #include "code/relocInfo.hpp" 30 #include "nativeInst_ppc.hpp" 31 #include "oops/oop.inline.hpp" 32 #include "runtime/safepoint.hpp" 33 34 void Relocation::pd_set_data_value(address x, intptr_t o, bool verify_only) { 35 bool copy_back_to_oop_pool = true; // TODO: PPC port 36 // The following comment is from the declaration of DataRelocation: 37 // 38 // "The "o" (displacement) argument is relevant only to split relocations 39 // on RISC machines. In some CPUs (SPARC), the set-hi and set-lo ins'ns 40 // can encode more than 32 bits between them. This allows compilers to 41 // share set-hi instructions between addresses that differ by a small 42 // offset (e.g., different static variables in the same class). 43 // On such machines, the "x" argument to set_value on all set-lo 44 // instructions must be the same as the "x" argument for the 45 // corresponding set-hi instructions. The "o" arguments for the 46 // set-hi instructions are ignored, and must not affect the high-half 47 // immediate constant. The "o" arguments for the set-lo instructions are 48 // added into the low-half immediate constant, and must not overflow it." 49 // 50 // Currently we don't support splitting of relocations, so o must be 51 // zero: 52 assert(o == 0, "tried to split relocations"); 53 54 if (!verify_only) { 55 if (format() != 1) { 56 nativeMovConstReg_at(addr())->set_data_plain(((intptr_t)x), code()); 57 } else { 58 assert(type() == relocInfo::oop_type || type() == relocInfo::metadata_type, 59 "how to encode else?"); 60 narrowOop no = (type() == relocInfo::oop_type) ? 61 oopDesc::encode_heap_oop((oop)x) : Klass::encode_klass((Klass*)x); 62 nativeMovConstReg_at(addr())->set_narrow_oop(no, code()); 63 } 64 } else { 65 assert((address) (nativeMovConstReg_at(addr())->data()) == x, "data must match"); 66 } 67 } 68 69 address Relocation::pd_call_destination(address orig_addr) { 70 intptr_t adj = 0; 71 address inst_loc = addr(); 72 73 if (orig_addr != NULL) { 74 // We just moved this call instruction from orig_addr to addr(). 75 // This means its target will appear to have grown by addr() - orig_addr. 76 adj = -(inst_loc - orig_addr); 77 } 78 if (NativeFarCall::is_far_call_at(inst_loc)) { 79 NativeFarCall* call = nativeFarCall_at(inst_loc); 80 return call->destination() + (intptr_t)(call->is_pcrelative() ? adj : 0); 81 } else if (NativeJump::is_jump_at(inst_loc)) { 82 NativeJump* jump = nativeJump_at(inst_loc); 83 return jump->jump_destination() + (intptr_t)(jump->is_pcrelative() ? adj : 0); 84 } else if (NativeConditionalFarBranch::is_conditional_far_branch_at(inst_loc)) { 85 NativeConditionalFarBranch* branch = NativeConditionalFarBranch_at(inst_loc); 86 return branch->branch_destination(); 87 } else { 88 // There are two instructions at the beginning of a stub, therefore we 89 // load at orig_addr + 8. 90 orig_addr = nativeCall_at(inst_loc)->get_trampoline(); 91 if (orig_addr == NULL) { 92 return (address) -1; 93 } else { 94 return (address) nativeMovConstReg_at(orig_addr + 8)->data(); 95 } 96 } 97 } 98 99 void Relocation::pd_set_call_destination(address x) { 100 address inst_loc = addr(); 101 102 if (NativeFarCall::is_far_call_at(inst_loc)) { 103 NativeFarCall* call = nativeFarCall_at(inst_loc); 104 call->set_destination(x); 105 } else if (NativeJump::is_jump_at(inst_loc)) { 106 NativeJump* jump= nativeJump_at(inst_loc); 107 jump->set_jump_destination(x); 108 } else if (NativeConditionalFarBranch::is_conditional_far_branch_at(inst_loc)) { 109 NativeConditionalFarBranch* branch = NativeConditionalFarBranch_at(inst_loc); 110 branch->set_branch_destination(x); 111 } else { 112 NativeCall* call = nativeCall_at(inst_loc); 113 call->set_destination_mt_safe(x, false); 114 } 115 } 116 117 address* Relocation::pd_address_in_code() { 118 ShouldNotReachHere(); 119 return 0; 120 } 121 122 address Relocation::pd_get_address_from_code() { 123 return (address)(nativeMovConstReg_at(addr())->data()); 124 } 125 126 void poll_Relocation::fix_relocation_after_move(const CodeBuffer* src, CodeBuffer* dest) { 127 } 128 129 void poll_return_Relocation::fix_relocation_after_move(const CodeBuffer* src, CodeBuffer* dest) { 130 } 131 132 void metadata_Relocation::pd_fix_value(address x) { 133 }