Hello, I'm trying to detect the addresses of the instructions which performs a memory access to a specific global variable. The problem I get is that instructions' addresses are only available after linkage, so I thought about generating "false" instructions (like SIMD/NEON which I don use in my code) to, posteriorly in the disassembly view, identify where this mem accesses occur and extract the instructions' addresses. To do what I said above, I think I need to go as low as the pattern matching phase of GCC. My idea is to use a callback when RTL nodes are matched to real load/store instructions to my specific variables. With this callback I could inject the false instruction and log the real one. Does anyone has an idea on how can I achieve this or if this is possible at all using the Plugin API? Do I get any advantage by compiling and linking at the same time? Thanks.
