Re: [PATCH RFC] kprobes: Remove MODULES dependency

Steven Rostedt
2020-07-10T13:22:50Z

On Fri, 10 Jul 2020 22:18:02 +0900
Masami Hiramatsu <mhiramat@kernel.org> wrote:

>
> Agreed. As far as I know, ftrace and bpf also depends on module_alloc(),
> so text_alloc() will help them too.
>

Yes please.

arch/x86/kernel/ftrace.c:

#ifdef CONFIG_MODULES
#include <linux/moduleloader.h>
/* Module allocation simplifies allocating memory for code */
static inline void *alloc_tramp(unsigned long size)
{
return module_alloc(size);
}
static inline void tramp_free(void *tramp)
{
module_memfree(tramp);
}
#else
/* Trampolines can only be created if modules are supported */
static inline void *alloc_tramp(unsigned long size)
{
return NULL;
}
static inline void tramp_free(void *tramp) { }
#endif

-- Steve