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sh: Tidy up the _TIF work masks, and fix syscall trace bug on singlestep. 

Signed-off-by: Paul Mundt <lethal@linux-sh.org>
This commit is contained in:
Paul Mundt 2008-07-30 13:11:26 +09:00
parent daf423db3b
commit cec3fd3e2a
3 changed files with 30 additions and 14 deletions
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38
arch/sh/include/asm/thread_info.h
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@ -123,18 +123,34 @@ static inline struct thread_info *current_thread_info(void)
#define TIF_MEMDIE 18
#define TIF_FREEZE 19
#define _TIF_SYSCALL_TRACE (1<<TIF_SYSCALL_TRACE)
#define _TIF_SIGPENDING (1<<TIF_SIGPENDING)
#define _TIF_NEED_RESCHED (1<<TIF_NEED_RESCHED)
#define _TIF_RESTORE_SIGMASK (1<<TIF_RESTORE_SIGMASK)
#define _TIF_SINGLESTEP (1<<TIF_SINGLESTEP)
#define _TIF_SYSCALL_AUDIT (1<<TIF_SYSCALL_AUDIT)
#define _TIF_USEDFPU (1<<TIF_USEDFPU)
#define _TIF_POLLING_NRFLAG (1<<TIF_POLLING_NRFLAG)
#define _TIF_FREEZE (1<<TIF_FREEZE)
#define _TIF_SYSCALL_TRACE (1 << TIF_SYSCALL_TRACE)
#define _TIF_SIGPENDING (1 << TIF_SIGPENDING)
#define _TIF_NEED_RESCHED (1 << TIF_NEED_RESCHED)
#define _TIF_RESTORE_SIGMASK (1 << TIF_RESTORE_SIGMASK)
#define _TIF_SINGLESTEP (1 << TIF_SINGLESTEP)
#define _TIF_SYSCALL_AUDIT (1 << TIF_SYSCALL_AUDIT)
#define _TIF_USEDFPU (1 << TIF_USEDFPU)
#define _TIF_POLLING_NRFLAG (1 << TIF_POLLING_NRFLAG)
#define _TIF_FREEZE (1 << TIF_FREEZE)
#define _TIF_WORK_MASK 0x000000FE /* work to do on interrupt/exception return */
#define _TIF_ALLWORK_MASK 0x000000FF /* work to do on any return to u-space */
/*
* _TIF_ALLWORK_MASK and _TIF_WORK_MASK need to fit within a byte, or we
* blow the tst immediate size constraints and need to fix up
* arch/sh/kernel/entry-common.S.
*/
/* work to do in syscall trace */
#define _TIF_WORK_SYSCALL_MASK (_TIF_SYSCALL_TRACE | _TIF_SINGLESTEP | \
_TIF_SYSCALL_AUDIT)
/* work to do on any return to u-space */
#define _TIF_ALLWORK_MASK (_TIF_SYSCALL_TRACE | _TIF_SIGPENDING | \
_TIF_NEED_RESCHED | _TIF_SYSCALL_AUDIT | \
_TIF_SINGLESTEP | _TIF_RESTORE_SIGMASK)
/* work to do on interrupt/exception return */
#define _TIF_WORK_MASK (_TIF_ALLWORK_MASK & ~(_TIF_SYSCALL_TRACE | \
_TIF_SYSCALL_AUDIT | _TIF_SINGLESTEP))
#endif /* __KERNEL__ */

2
arch/sh/kernel/cpu/sh5/entry.S
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@ -1300,7 +1300,7 @@ syscall_allowed:
getcon KCR0, r2
ld.l r2, TI_FLAGS, r4
movi (_TIF_SYSCALL_TRACE | _TIF_SINGLESTEP | _TIF_SYSCALL_AUDIT), r6
movi _TIF_WORK_SYSCALL_MASK, r6
and r6, r4, r6
beq/l r6, ZERO, tr0

4
arch/sh/kernel/entry-common.S
View File

@ -202,7 +202,7 @@ work_resched:
syscall_exit_work:
! r0: current_thread_info->flags
! r8: current_thread_info
tst #_TIF_SYSCALL_TRACE | _TIF_SINGLESTEP | _TIF_SYSCALL_AUDIT, r0
tst #_TIF_WORK_SYSCALL_MASK, r0
bt/s work_pending
tst #_TIF_NEED_RESCHED, r0
#ifdef CONFIG_TRACE_IRQFLAGS
@ -351,7 +351,7 @@ ENTRY(system_call)
!
get_current_thread_info r8, r10
mov.l @(TI_FLAGS,r8), r8
mov #(_TIF_SYSCALL_TRACE | _TIF_SYSCALL_AUDIT), r10
mov #_TIF_WORK_SYSCALL_MASK, r10
tst r10, r8
bf syscall_trace_entry
!