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Diffstat (limited to 'llvm/docs/Extensions.rst')
| -rw-r--r-- | llvm/docs/Extensions.rst | 29 |
1 files changed, 29 insertions, 0 deletions
diff --git a/llvm/docs/Extensions.rst b/llvm/docs/Extensions.rst index 89a0e80..214323e 100644 --- a/llvm/docs/Extensions.rst +++ b/llvm/docs/Extensions.rst @@ -601,6 +601,35 @@ sees fit (generally the section that would provide the best locality). .. _CFI jump table: https://clang.llvm.org/docs/ControlFlowIntegrityDesign.html#forward-edge-cfi-for-indirect-function-calls +``SHT_LLVM_CALL_GRAPH`` Section (Call Graph) +^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^ + +This section is used to store the call graph. It has a type of +``SHT_LLVM_CALL_GRAPH`` (0x6fff4c0f). Details of call graph section layout +are described in :doc:`CallGraphSection`. + +For example: + +.. code-block:: gas + + .section ".llvm.callgraph","",@llvm_call_graph + .byte 0 + .byte 7 + .quad .Lball + .quad 0 + .byte 3 + .quad foo + .quad bar + .quad baz + .byte 3 + .quad 4524972987496481828 + .quad 3498816979441845844 + .quad 8646233951371320954 + +This indicates that ``ball`` calls ``foo``, ``bar`` and ``baz`` directly; +``ball`` indirectly calls functions whose types are ``4524972987496481828``, +``3498816979441845844`` and ``8646233951371320954``. + CodeView-Dependent ------------------ |