Hi Kees,
On Thu, Feb 24, 2022 at 7:04 AM Kees Cook <keescook@xxxxxxxxxxxx> wrote:
To follow the existing per-arch conventions, add asm "sp" as
"current_stack_pointer". This will let it be used in non-arch places
(like HARDENED_USERCOPY).
Cc: Geert Uytterhoeven <geert@xxxxxxxxxxxxxx>
Cc: linux-m68k@xxxxxxxxxxxxxxxxxxxx
Signed-off-by: Kees Cook <keescook@xxxxxxxxxxxx>
Thanks for your patch!
--- a/arch/m68k/include/asm/current.h
+++ b/arch/m68k/include/asm/current.h
@@ -24,6 +24,8 @@ static inline struct task_struct *get_current(void)
#define current get_current()
+register unsigned long current_stack_pointer __asm__("sp");
I don't know what HARDENED_USERCOPY does, so I don't know if you need
"usp" (see rdusp()) or "sp"?
+
#endif /* CONFNIG_MMU */
#endif /* !(_M68K_CURRENT_H) */
Gr{oetje,eeting}s,
Geert
--
Geert Uytterhoeven -- There's lots of Linux beyond ia32 -- geert@xxxxxxxxxxxxxx
In personal conversations with technical people, I call myself a hacker. But
when I'm talking to journalists I just say "programmer" or something like that.
-- Linus Torvalds
