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Convert return address to instruction pointer.
Unit
ELowLevel
Syntax
Code (Delphi)
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function ConvertRetAddr(
const AReturnAddr: Pointer
): Pointer;
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Parameters
AReturnAddr [in]
Return address. It is usually obtained by analyzing call stack or via ReturnAddress.
Return value
Pointer to CALL opcode. This value is always less than AReturnAddr.
Remarks
This routine is used for hooks.
If you have a return address and want to show/indicate caller - then you can use this function to convert return address to instruction pointer in caller's source. This function is needed because return address points to the next line in source file.
Function doesn't raise access violation in case of unavailable memory.
Warning
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Function does NOT check if the AReturnAddr is a valid return address. Do not pass arbitrary pointers, pass return addresses only.
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Note
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This is a wrapper for EDisAsm.GetAddrByRetAddr function.
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Examples
Code (Delphi)
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var
P: Pointer;
begin
P := ReturnAddress; // P is a return address to caller (e.g. next line)
P := ConvertRetAddr(P); // Now P points to the exact caller of this code
end;
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See also
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Send feedback...
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Build date: 2024-09-30
Last edited: 2024-09-30
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