From: Mathieu Desnoyers > Sent: 14 June 2019 14:02 ... > But my original issue remains: if I define a variable called __rseq_handled > within either the main executable or the preloaded library, it overshadows > the libc one: 1) That is the was elf symbol resolution is required to work. Otherwise variables like 'errno' (non-thread safe form) wouldn't work. 2) Don't do it then :-) Names starting with __ will be reserved (probably 'for the implementation'). The real 'fun' starts because, under some circumstances, looking up a symbol as: foo = dlsym(lib_handle, "foo"); Can find the data item instead of the function! Usually it works (even when foo is global data) because 'lib_handle' refers to a different symbol table. But it can go horribly wrong. David - Registered Address Lakeside, Bramley Road, Mount Farm, Milton Keynes, MK1 1PT, UK Registration No: 1397386 (Wales)
