From: Kees Cook Date: Sun, 20 Feb 2022 01:20:02 +0000 (-0800) Subject: m68k: Implement "current_stack_pointer" X-Git-Url: http://git.maquefel.me/?a=commitdiff_plain;h=575d6b77fa2697afd2b3a443f7f879faa65ae0ca;p=linux.git m68k: Implement "current_stack_pointer" 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: linux-m68k@lists.linux-m68k.org Signed-off-by: Kees Cook Acked-by: Geert Uytterhoeven Link: https://lore.kernel.org/lkml/CAMuHMdU6msvi0j=mS28GFYbm+uMRk7PkYe+zOM4sDmOVxeibLQ@mail.gmail.com --- diff --git a/arch/m68k/Kconfig b/arch/m68k/Kconfig index 936e1803c7c7d..f0eac0e2f1237 100644 --- a/arch/m68k/Kconfig +++ b/arch/m68k/Kconfig @@ -4,6 +4,7 @@ config M68K default y select ARCH_32BIT_OFF_T select ARCH_HAS_BINFMT_FLAT + select ARCH_HAS_CURRENT_STACK_POINTER select ARCH_HAS_DMA_PREP_COHERENT if HAS_DMA && MMU && !COLDFIRE select ARCH_HAS_SYNC_DMA_FOR_DEVICE if HAS_DMA select ARCH_HAVE_NMI_SAFE_CMPXCHG if RMW_INSNS diff --git a/arch/m68k/include/asm/current.h b/arch/m68k/include/asm/current.h index 6390ef2f7f864..c117907e12765 100644 --- 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() -#endif /* CONFNIG_MMU */ +#endif /* CONFIG_MMU */ + +register unsigned long current_stack_pointer __asm__("sp"); #endif /* !(_M68K_CURRENT_H) */