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.inline.hpp" 27 #include "assembler_arm.inline.hpp" 28 #include "code/relocInfo.hpp" 29 #include "nativeInst_arm.hpp" 30 #include "oops/compressedOops.inline.hpp" 31 #include "oops/oop.hpp" 32 #include "runtime/orderAccess.hpp" 33 #include "runtime/safepoint.hpp" 34 35 void Relocation::pd_set_data_value(address x, intptr_t o, bool verify_only) { 36 37 NativeMovConstReg* ni = nativeMovConstReg_at(addr()); 38 #if defined(AARCH64) && defined(COMPILER2) 39 if (ni->is_movz()) { 40 assert(type() == relocInfo::oop_type, "!"); 41 if (verify_only) { 42 uintptr_t d = ni->data(); 43 guarantee((d >> 32) == 0, "not narrow oop"); 44 narrowOop no = d; 45 oop o = CompressedOops::decode(no); 46 guarantee(cast_from_oop<intptr_t>(o) == (intptr_t)x, "instructions must match"); 47 } else { 48 ni->set_data((intptr_t)x); 49 } 50 return; 51 } 52 #endif 53 if (verify_only) { 54 guarantee(ni->data() == (intptr_t)(x + o), "instructions must match"); 55 } else { 56 ni->set_data((intptr_t)(x + o)); 57 } 58 } 59 60 address Relocation::pd_call_destination(address orig_addr) { 61 address pc = addr(); 62 63 int adj = 0; 64 if (orig_addr != NULL) { 65 // We just moved this call instruction from orig_addr to addr(). 66 // This means that, when relative, its target will appear to have grown by addr() - orig_addr. 67 adj = orig_addr - pc; 68 } 69 70 RawNativeInstruction* ni = rawNativeInstruction_at(pc); 71 72 #if (!defined(AARCH64)) 73 if (NOT_AARCH64(ni->is_add_lr()) AARCH64_ONLY(ni->is_adr_aligned_lr())) { 74 // On arm32, skip the optional 'add LR, PC, #offset' 75 // (Allowing the jump support code to handle fat_call) 76 pc = ni->next_raw_instruction_address(); 77 ni = nativeInstruction_at(pc); 78 } 79 #endif 80 81 if (AARCH64_ONLY(ni->is_call()) NOT_AARCH64(ni->is_bl())) { 82 // For arm32, fat_call are handled by is_jump for the new 'ni', 83 // requiring only to support is_bl. 84 // 85 // For AARCH64, skipping a leading adr is not sufficient 86 // to reduce calls to a simple bl. 87 return rawNativeCall_at(pc)->destination(adj); 88 } 89 90 if (ni->is_jump()) { 91 return rawNativeJump_at(pc)->jump_destination(adj); 92 } 93 ShouldNotReachHere(); 94 return NULL; 95 } 96 97 void Relocation::pd_set_call_destination(address x) { 98 address pc = addr(); 99 NativeInstruction* ni = nativeInstruction_at(pc); 100 101 #if (!defined(AARCH64)) 102 if (NOT_AARCH64(ni->is_add_lr()) AARCH64_ONLY(ni->is_adr_aligned_lr())) { 103 // On arm32, skip the optional 'add LR, PC, #offset' 104 // (Allowing the jump support code to handle fat_call) 105 pc = ni->next_raw_instruction_address(); 106 ni = nativeInstruction_at(pc); 107 } 108 #endif 109 110 if (AARCH64_ONLY(ni->is_call()) NOT_AARCH64(ni->is_bl())) { 111 // For arm32, fat_call are handled by is_jump for the new 'ni', 112 // requiring only to support is_bl. 113 // 114 // For AARCH64, skipping a leading adr is not sufficient 115 // to reduce calls to a simple bl. 116 rawNativeCall_at(pc)->set_destination(x); 117 return; 118 } 119 120 if (ni->is_jump()) { // raw jump 121 rawNativeJump_at(pc)->set_jump_destination(x); 122 return; 123 } 124 ShouldNotReachHere(); 125 } 126 127 128 address* Relocation::pd_address_in_code() { 129 return (address*)addr(); 130 } 131 132 address Relocation::pd_get_address_from_code() { 133 return *pd_address_in_code(); 134 } 135 136 void poll_Relocation::fix_relocation_after_move(const CodeBuffer* src, CodeBuffer* dest) { 137 } 138 139 void metadata_Relocation::pd_fix_value(address x) { 140 assert(! addr_in_const(), "Do not use"); 141 #ifdef AARCH64 142 #ifdef COMPILER2 143 NativeMovConstReg* ni = nativeMovConstReg_at(addr()); 144 if (ni->is_mov_slow()) { 145 return; 146 } 147 #endif 148 set_value(x); 149 #else 150 if (!VM_Version::supports_movw()) { 151 set_value(x); 152 #ifdef ASSERT 153 } else { 154 // the movw/movt data should be correct 155 NativeMovConstReg* ni = nativeMovConstReg_at(addr()); 156 assert(ni->is_movw(), "not a movw"); 157 // The following assert should be correct but the shared code 158 // currently 'fixes' the metadata instructions before the 159 // metadata_table is copied in the new method (see 160 // JDK-8042845). This means that 'x' (which comes from the table) 161 // does not match the value inlined in the code (which is 162 // correct). Failure can be temporarily ignored since the code is 163 // correct and the table is copied shortly afterward. 164 // 165 // assert(ni->data() == (int)x, "metadata relocation mismatch"); 166 #endif 167 } 168 #endif // !AARCH64 169 } | 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.inline.hpp" 27 #include "assembler_arm.inline.hpp" 28 #include "code/relocInfo.hpp" 29 #include "nativeInst_arm.hpp" 30 #include "oops/compressedOops.inline.hpp" 31 #include "oops/oop.hpp" 32 #include "runtime/orderAccess.hpp" 33 #include "runtime/safepoint.hpp" 34 35 void Relocation::pd_set_data_value(address x, intptr_t o, bool verify_only) { 36 37 NativeMovConstReg* ni = nativeMovConstReg_at(addr()); 38 if (verify_only) { 39 guarantee(ni->data() == (intptr_t)(x + o), "instructions must match"); 40 } else { 41 ni->set_data((intptr_t)(x + o)); 42 } 43 } 44 45 address Relocation::pd_call_destination(address orig_addr) { 46 address pc = addr(); 47 48 int adj = 0; 49 if (orig_addr != NULL) { 50 // We just moved this call instruction from orig_addr to addr(). 51 // This means that, when relative, its target will appear to have grown by addr() - orig_addr. 52 adj = orig_addr - pc; 53 } 54 55 RawNativeInstruction* ni = rawNativeInstruction_at(pc); 56 57 if (ni->is_add_lr()) { 58 // Skip the optional 'add LR, PC, #offset' 59 // (Allowing the jump support code to handle fat_call) 60 pc = ni->next_raw_instruction_address(); 61 ni = nativeInstruction_at(pc); 62 } 63 64 if (ni->is_bl()) { 65 // Fat_call are handled by is_jump for the new 'ni', 66 // requiring only to support is_bl. 67 return rawNativeCall_at(pc)->destination(adj); 68 } 69 70 if (ni->is_jump()) { 71 return rawNativeJump_at(pc)->jump_destination(adj); 72 } 73 ShouldNotReachHere(); 74 return NULL; 75 } 76 77 void Relocation::pd_set_call_destination(address x) { 78 address pc = addr(); 79 NativeInstruction* ni = nativeInstruction_at(pc); 80 81 if (ni->is_add_lr()) { 82 // Skip the optional 'add LR, PC, #offset' 83 // (Allowing the jump support code to handle fat_call) 84 pc = ni->next_raw_instruction_address(); 85 ni = nativeInstruction_at(pc); 86 } 87 88 if (ni->is_bl()) { 89 // Fat_call are handled by is_jump for the new 'ni', 90 // requiring only to support is_bl. 91 rawNativeCall_at(pc)->set_destination(x); 92 return; 93 } 94 95 if (ni->is_jump()) { // raw jump 96 rawNativeJump_at(pc)->set_jump_destination(x); 97 return; 98 } 99 ShouldNotReachHere(); 100 } 101 102 103 address* Relocation::pd_address_in_code() { 104 return (address*)addr(); 105 } 106 107 address Relocation::pd_get_address_from_code() { 108 return *pd_address_in_code(); 109 } 110 111 void poll_Relocation::fix_relocation_after_move(const CodeBuffer* src, CodeBuffer* dest) { 112 } 113 114 void metadata_Relocation::pd_fix_value(address x) { 115 assert(! addr_in_const(), "Do not use"); 116 if (!VM_Version::supports_movw()) { 117 set_value(x); 118 #ifdef ASSERT 119 } else { 120 // the movw/movt data should be correct 121 NativeMovConstReg* ni = nativeMovConstReg_at(addr()); 122 assert(ni->is_movw(), "not a movw"); 123 // The following assert should be correct but the shared code 124 // currently 'fixes' the metadata instructions before the 125 // metadata_table is copied in the new method (see 126 // JDK-8042845). This means that 'x' (which comes from the table) 127 // does not match the value inlined in the code (which is 128 // correct). Failure can be temporarily ignored since the code is 129 // correct and the table is copied shortly afterward. 130 // 131 // assert(ni->data() == (int)x, "metadata relocation mismatch"); 132 #endif 133 } 134 } |