Patching code/symbols into a dynamic-linked ELF binary

Question

Suppose I have an ELF binary that\'s dynamic linked, and I want to override/redirect certain library calls. I know I can do this with LD_PRELOAD, but I want a solut

Answer 1

ld has the option --wrap that lets you replace a given symbol like malloc by a symbol you'd call __wrap_malloc. With that you could write some stubs for the functions you are interested in and link that to the library in question.