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Commit 64482bd8 authored by Al Viro's avatar Al Viro
Browse files

parisc: decide whether to go to slow path (tracesys) based on thread flags 



Signed-off-by: default avatarAl Viro <viro@zeniv.linux.org.uk>
parent e3b880c6

arch/parisc/include/asm/thread_info.h

+2 −0
Original line number Diff line number Diff line
@@ -74,6 +74,8 @@ struct thread_info { 


#define _TIF_USER_WORK_MASK     (_TIF_SIGPENDING | _TIF_NOTIFY_RESUME | \

                                 _TIF_NEED_RESCHED)

#define _TIF_SYSCALL_TRACE_MASK (_TIF_SYSCALL_TRACE | _TIF_SINGLESTEP |	\

				 _TIF_BLOCKSTEP)



#define tsk_is_polling(t) test_tsk_thread_flag(t, TIF_POLLING_NRFLAG)

arch/parisc/kernel/syscall.S

+4 −3
Original line number Diff line number Diff line
@@ -180,9 +180,10 @@ linux_gateway_entry: 


	/* Are we being ptraced? */

	mfctl	%cr30, %r1

	LDREG	TI_TASK(%r1),%r1

	ldw	TASK_PTRACE(%r1), %r1

	bb,<,n	%r1,31,.Ltracesys

	LDREG	TI_FLAGS(%r1),%r1

	ldi	_TIF_SYSCALL_TRACE_MASK, %r19

	and,COND(=) %r1, %r19, %r0

	b,n	.Ltracesys

	

	/* Note!  We cannot use the syscall table that is mapped

	nearby since the gateway page is mapped execute-only. */