21 * questions.
22 */
23
24 package jdk.tools.jaotc;
25
26 import jdk.tools.jaotc.binformat.BinaryContainer;
27 import jdk.tools.jaotc.binformat.Symbol;
28 import jdk.tools.jaotc.StubInformation;
29
30 import jdk.vm.ci.code.site.Call;
31 import jdk.vm.ci.hotspot.HotSpotResolvedJavaMethod;
32
33 /**
34 * Symbol for a regular Java call. This method also creates additional relocations for {@code .plt}
35 * to {@code .got} and {@code .got} to {@code .plt}.
36 */
37 final class JavaCallSiteRelocationSymbol extends CallSiteRelocationSymbol {
38
39 private static final byte[] zeroSlot = new byte[8];
40 // -1 represents Universe::non_oop_word() value
41 private static final byte[] minusOneSlot = {-1, -1, -1, -1, -1, -1, -1, -1};
42
43 JavaCallSiteRelocationSymbol(CompiledMethodInfo mi, Call call, CallSiteRelocationInfo callSiteRelocation, BinaryContainer binaryContainer) {
44 super(createPltEntrySymbol(binaryContainer, mi, call, callSiteRelocation));
45 StubInformation stub = getStub(mi, call);
46 addRelocations(mi, stub, binaryContainer, call, callSiteRelocation);
47 }
48
49 /**
50 * Returns a unique symbol name with the {@code suffix} appended.
51 */
52 private static String relocationSymbolName(String suffix, CompiledMethodInfo mi, Call call, CallSiteRelocationInfo callSiteRelocation) {
53 return "M" + mi.getCodeId() + "_" + call.pcOffset + "_" + callSiteRelocation.targetSymbol + "_" + suffix;
54 }
55
56 private static Symbol createPltEntrySymbol(BinaryContainer binaryContainer, CompiledMethodInfo mi, Call call, CallSiteRelocationInfo callSiteRelocation) {
57 String symbolName = relocationSymbolName("plt.entry", mi, call, callSiteRelocation);
58 StubInformation stub = getStub(mi, call);
59 return createCodeContainerSymbol(binaryContainer, symbolName, stub.getOffset());
60 }
61
106 String gotMoveSymbolName = relocationSymbolName("got.move", mi, call, callSiteRelocation);
107 addExtLinkageGotContainerRelocation(binaryContainer, gotMoveSymbolName, gotMetaOffset, stub.getMovOffset());
108
109 if (isVirtualCall) {
110 // Nothing.
111 } else {
112 // Add relocation to GOT cell for c2i adapter jump.
113 // The c2i jump instruction loads destination address from this GOT cell.
114 // This GOT cell is initialized with -1 and will be updated
115 // by JVM runtime call resolution code.
116 String gotC2ISymbolName = relocationSymbolName("got.c2i", mi, call, callSiteRelocation);
117 addExtLinkageGotContainerRelocation(binaryContainer, gotC2ISymbolName, gotStartOffset + 8, stub.getC2IJumpOffset());
118 }
119 }
120
121 /**
122 * Returns the name of the resolve method for this particular call.
123 */
124 private static String getResolveSymbolName(CompiledMethodInfo mi, Call call) {
125 String resolveSymbolName;
126 if (CallInfo.isStaticCall(call)) {
127 assert mi.hasMark(call, MarkId.INVOKESTATIC);
128 resolveSymbolName = BinaryContainer.getResolveStaticEntrySymbolName();
129 } else if (CallInfo.isSpecialCall(call)) {
130 resolveSymbolName = BinaryContainer.getResolveOptVirtualEntrySymbolName();
131 } else if (CallInfo.isOptVirtualCall(mi, call)) {
132 resolveSymbolName = BinaryContainer.getResolveOptVirtualEntrySymbolName();
133 } else if (CallInfo.isVirtualCall(mi, call)) {
134 resolveSymbolName = BinaryContainer.getResolveVirtualEntrySymbolName();
135 } else {
136 throw new InternalError("Unknown call type in " + mi.asTag() + " @ " + call.pcOffset + " for call" + call.target);
137 }
138 return resolveSymbolName;
139 }
140
141 }
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21 * questions.
22 */
23
24 package jdk.tools.jaotc;
25
26 import jdk.tools.jaotc.binformat.BinaryContainer;
27 import jdk.tools.jaotc.binformat.Symbol;
28 import jdk.tools.jaotc.StubInformation;
29
30 import jdk.vm.ci.code.site.Call;
31 import jdk.vm.ci.hotspot.HotSpotResolvedJavaMethod;
32
33 /**
34 * Symbol for a regular Java call. This method also creates additional relocations for {@code .plt}
35 * to {@code .got} and {@code .got} to {@code .plt}.
36 */
37 final class JavaCallSiteRelocationSymbol extends CallSiteRelocationSymbol {
38
39 private static final byte[] zeroSlot = new byte[8];
40 // -1 represents Universe::non_oop_word() value
41 private static final byte[] minusOneSlot;
42
43 static {
44 String archStr = System.getProperty("os.arch").toLowerCase();
45 if (archStr.equals("aarch64")) {
46 // AArch64 is a special case: it uses 48-bit addresses.
47 byte[] non_oop_word = {-1, -1, -1, -1, -1, -1, 0, 0};
48 minusOneSlot = non_oop_word;
49 } else {
50 byte[] non_oop_word = {-1, -1, -1, -1, -1, -1, -1, -1};
51 minusOneSlot = non_oop_word;
52 }
53 }
54
55 JavaCallSiteRelocationSymbol(CompiledMethodInfo mi, Call call, CallSiteRelocationInfo callSiteRelocation, BinaryContainer binaryContainer) {
56 super(createPltEntrySymbol(binaryContainer, mi, call, callSiteRelocation));
57 StubInformation stub = getStub(mi, call);
58 addRelocations(mi, stub, binaryContainer, call, callSiteRelocation);
59 }
60
61 /**
62 * Returns a unique symbol name with the {@code suffix} appended.
63 */
64 private static String relocationSymbolName(String suffix, CompiledMethodInfo mi, Call call, CallSiteRelocationInfo callSiteRelocation) {
65 return "M" + mi.getCodeId() + "_" + call.pcOffset + "_" + callSiteRelocation.targetSymbol + "_" + suffix;
66 }
67
68 private static Symbol createPltEntrySymbol(BinaryContainer binaryContainer, CompiledMethodInfo mi, Call call, CallSiteRelocationInfo callSiteRelocation) {
69 String symbolName = relocationSymbolName("plt.entry", mi, call, callSiteRelocation);
70 StubInformation stub = getStub(mi, call);
71 return createCodeContainerSymbol(binaryContainer, symbolName, stub.getOffset());
72 }
73
118 String gotMoveSymbolName = relocationSymbolName("got.move", mi, call, callSiteRelocation);
119 addExtLinkageGotContainerRelocation(binaryContainer, gotMoveSymbolName, gotMetaOffset, stub.getMovOffset());
120
121 if (isVirtualCall) {
122 // Nothing.
123 } else {
124 // Add relocation to GOT cell for c2i adapter jump.
125 // The c2i jump instruction loads destination address from this GOT cell.
126 // This GOT cell is initialized with -1 and will be updated
127 // by JVM runtime call resolution code.
128 String gotC2ISymbolName = relocationSymbolName("got.c2i", mi, call, callSiteRelocation);
129 addExtLinkageGotContainerRelocation(binaryContainer, gotC2ISymbolName, gotStartOffset + 8, stub.getC2IJumpOffset());
130 }
131 }
132
133 /**
134 * Returns the name of the resolve method for this particular call.
135 */
136 private static String getResolveSymbolName(CompiledMethodInfo mi, Call call) {
137 String resolveSymbolName;
138 String name = call.target.toString();
139 if (CallInfo.isStaticCall(call)) {
140 assert mi.hasMark(call, MarkId.INVOKESTATIC);
141 resolveSymbolName = BinaryContainer.getResolveStaticEntrySymbolName();
142 } else if (CallInfo.isSpecialCall(call)) {
143 resolveSymbolName = BinaryContainer.getResolveOptVirtualEntrySymbolName();
144 } else if (CallInfo.isOptVirtualCall(mi, call)) {
145 resolveSymbolName = BinaryContainer.getResolveOptVirtualEntrySymbolName();
146 } else if (CallInfo.isVirtualCall(mi, call)) {
147 resolveSymbolName = BinaryContainer.getResolveVirtualEntrySymbolName();
148 } else {
149 throw new InternalError("Unknown call type in " + mi.asTag() + " @ " + call.pcOffset + " for call" + call.target);
150 }
151 return resolveSymbolName;
152 }
153
154 }
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