proj: Add library file name and symbol name to return address

doc/README.md

@@ -9,7 +9,7 @@ From the [ENVIRONMENT section in the Linux manual page ld.so(8)](https://www.man
 
 > **`LD_PRELOAD`**
 >
-> A list of additional, user-specified, ELF shared objects  to be loaded before all others.
+> A list of additional, user-specified, ELF shared objects to be loaded before all others.
 > This feature can be used to selectively override functions in other shared objects.
 > [...]
 

doc/call-ident.md

@@ -0,0 +1,11 @@
+
+# Call Identification
+
+## For the same program execution
+
+* Return address (ASLR!)
+
+## For different executions
+
+* Sequence of calls (?)
+* Return address -> * `dladdr()`