[llvm] 2f21a27 - [JITLink] Expose x86-64 pointer jump stub block construction.
Lang Hames via llvm-commits
llvm-commits at lists.llvm.org
Wed May 12 22:28:24 PDT 2021
Author: Lang Hames
Date: 2021-05-12T22:28:14-07:00
New Revision: 2f21a272af69321555cdc2794664b5eba8fc3276
URL: https://github.com/llvm/llvm-project/commit/2f21a272af69321555cdc2794664b5eba8fc3276
DIFF: https://github.com/llvm/llvm-project/commit/2f21a272af69321555cdc2794664b5eba8fc3276.diff
LOG: [JITLink] Expose x86-64 pointer jump stub block construction.
This can be useful for clients who want to define their own symbol for the
stub, or re-use some existing symbol.
Added:
Modified:
llvm/include/llvm/ExecutionEngine/JITLink/x86_64.h
Removed:
################################################################################
diff --git a/llvm/include/llvm/ExecutionEngine/JITLink/x86_64.h b/llvm/include/llvm/ExecutionEngine/JITLink/x86_64.h
index d818234b2946..95ac614de82e 100644
--- a/llvm/include/llvm/ExecutionEngine/JITLink/x86_64.h
+++ b/llvm/include/llvm/ExecutionEngine/JITLink/x86_64.h
@@ -369,20 +369,30 @@ inline Symbol &createAnonymousPointer(LinkGraph &G, Section &PointerSection,
return G.addAnonymousSymbol(B, 0, 8, false, false);
}
-/// Create a jump stub that jumps via the pointer at the given symbol, returns
-/// an anonymous symbol pointing to it.
+/// Create a jump stub block that jumps via the pointer at the given symbol.
///
/// The stub block will have the following default values:
/// alignment: 8-bit
/// alignment-offset: 0
/// address: highest allowable: (~5U)
-inline Symbol &createAnonymousPointerJumpStub(LinkGraph &G,
- Section &StubSection,
- Symbol &PointerSymbol) {
+inline Block &createPointerJumpStubBlock(LinkGraph &G, Section &StubSection,
+ Symbol &PointerSymbol) {
auto &B =
G.createContentBlock(StubSection, PointerJumpStubContent, ~5ULL, 1, 0);
B.addEdge(Delta32, 2, PointerSymbol, -4);
- return G.addAnonymousSymbol(B, 0, 6, true, false);
+ return B;
+}
+
+/// Create a jump stub that jumps via the pointer at the given symbol and
+/// an anonymous symbol pointing to it. Return the anonymous symbol.
+///
+/// The stub block will be created by createPointerJumpStubBlock.
+inline Symbol &createAnonymousPointerJumpStub(LinkGraph &G,
+ Section &StubSection,
+ Symbol &PointerSymbol) {
+ return G.addAnonymousSymbol(
+ createPointerJumpStubBlock(G, StubSection, PointerSymbol), 0, 6, true,
+ false);
}
} // namespace x86_64
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