void *dereference_kernel_function_descriptor(void *ptr)
{
if (ptr < (void *)__start_opd ||
ptr >= (void *)__end_opd)
return ptr;
return dereference_function_descriptor(ptr);
}
/*
* On some architectures (PPC64, IA64) function pointers
* are actually only tokens to some data that then holds the
* real function address. As a result, to find if a function
* pointer is part of the kernel text, we need to do some
* special dereferencing first.
*/
int func_ptr_is_kernel_text(void *ptr)
{
unsigned long addr;
addr = (unsigned long) dereference_function_descriptor(ptr);
if (core_kernel_text(addr))
return 1;
return is_module_text_address(addr);
}
/* Lookup symbol info in the kernel */
static unsigned long lookup_addr(char *arg)
{
unsigned long addr = 0;
if (!strcmp(arg, "kgdbts_break_test"))
addr = (unsigned long)kgdbts_break_test;
else if (!strcmp(arg, "sys_open"))
addr = (unsigned long)do_sys_open;
else if (!strcmp(arg, "do_fork"))
addr = (unsigned long)do_fork;
else if (!strcmp(arg, "hw_break_val"))
addr = (unsigned long)&hw_break_val;
addr = (unsigned long) dereference_function_descriptor((void *)addr);
return addr;
}
