proc_addr2sym
proc_addr2sym(p, a, n, s, sym)
#define Plookup_by_addr proc_addr2sym
int proc_addr2sym(struct proc_handle *, uintptr_t, char *, size_t, GElf_Sym *);
error = proc_addr2sym(phdl, addr, name, namesz, &tsym);
error = proc_addr2sym(phdl, map->pr_vaddr, symname, sizeof(symname),
error = proc_addr2sym(phdl, bar_sym.st_value, symname, sizeof(symname),
error = proc_addr2sym(phdl, qux_sym.st_value, symname, sizeof(symname),
error = proc_addr2sym(phdl, foo_sym.st_value, symname, sizeof(symname),