Commit bd1912de authored by Kees Cook's avatar Kees Cook Committed by Matt Turner
Browse files

alpha: Implement "current_stack_pointer" 



To follow the existing per-arch conventions replace open-coded use
of asm "$30" as "current_stack_pointer". This will let it be used in
non-arch places (like HARDENED_USERCOPY).

Cc: Richard Henderson <rth@twiddle.net>
Cc: Ivan Kokshaysky <ink@jurassic.park.msu.ru>
Cc: Matt Turner <mattst88@gmail.com>
Cc: Geert Uytterhoeven <geert@linux-m68k.org>
Cc: Andrew Morton <akpm@linux-foundation.org>
Cc: Mike Rapoport <rppt@kernel.org>
Cc: Mark Rutland <mark.rutland@arm.com>
Cc: "Peter Zijlstra (Intel)" <peterz@infradead.org>
Cc: Kefeng Wang <wangkefeng.wang@huawei.com>
Cc: "Alexander A. Klimov" <grandmaster@al2klimov.de>
Cc: linux-alpha@vger.kernel.org
Signed-off-by: default avatarKees Cook <keescook@chromium.org>
Signed-off-by: default avatarMatt Turner <mattst88@gmail.com>
parent d7cf43ed

arch/alpha/Kconfig

+1 −0
Original line number Diff line number Diff line
@@ -3,6 +3,7 @@ config ALPHA 
	bool

	default y

	select ARCH_32BIT_USTAT_F_TINODE

	select ARCH_HAS_CURRENT_STACK_POINTER

	select ARCH_MIGHT_HAVE_PC_PARPORT

	select ARCH_MIGHT_HAVE_PC_SERIO

	select ARCH_NO_PREEMPT

arch/alpha/include/asm/thread_info.h

+2 −0
Original line number Diff line number Diff line
@@ -41,6 +41,8 @@ struct thread_info { 
register struct thread_info *__current_thread_info __asm__("$8");

#define current_thread_info()  __current_thread_info



register unsigned long *current_stack_pointer __asm__ ("$30");



#endif /* __ASSEMBLY__ */



/* Thread information allocation.  */

arch/alpha/lib/stacktrace.c

+1 −1
Original line number Diff line number Diff line
@@ -92,7 +92,7 @@ stacktrace(void) 
{

	instr * ret_pc;

	instr * prologue = (instr *)stacktrace;

	register unsigned char * sp __asm__ ("$30");

	unsigned char *sp = (unsigned char *)current_stack_pointer;



	printk("\tstack trace:\n");

	do {