forked from Minki/linux
fc79168a7c
This patch adds support for the TIF_SYSCALL_TRACEPOINT on the parisc architecture. Basically, it calls the appropriate tracepoints on syscall entry and exit. Signed-off-by: Helge Deller <deller@gmx.de>
91 lines
3.1 KiB
C
91 lines
3.1 KiB
C
#ifndef _ASM_PARISC_THREAD_INFO_H
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#define _ASM_PARISC_THREAD_INFO_H
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#ifdef __KERNEL__
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#ifndef __ASSEMBLY__
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#include <asm/processor.h>
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#include <asm/special_insns.h>
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struct thread_info {
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struct task_struct *task; /* main task structure */
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unsigned long flags; /* thread_info flags (see TIF_*) */
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mm_segment_t addr_limit; /* user-level address space limit */
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__u32 cpu; /* current CPU */
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int preempt_count; /* 0=premptable, <0=BUG; will also serve as bh-counter */
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};
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#define INIT_THREAD_INFO(tsk) \
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{ \
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.task = &tsk, \
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.flags = 0, \
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.cpu = 0, \
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.addr_limit = KERNEL_DS, \
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.preempt_count = INIT_PREEMPT_COUNT, \
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}
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#define init_thread_info (init_thread_union.thread_info)
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#define init_stack (init_thread_union.stack)
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/* how to get the thread information struct from C */
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#define current_thread_info() ((struct thread_info *)mfctl(30))
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#endif /* !__ASSEMBLY */
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/* thread information allocation */
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#define THREAD_SIZE_ORDER 2 /* PA-RISC requires at least 16k stack */
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/* Be sure to hunt all references to this down when you change the size of
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* the kernel stack */
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#define THREAD_SIZE (PAGE_SIZE << THREAD_SIZE_ORDER)
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#define THREAD_SHIFT (PAGE_SHIFT + THREAD_SIZE_ORDER)
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/*
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* thread information flags
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*/
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#define TIF_SYSCALL_TRACE 0 /* syscall trace active */
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#define TIF_SIGPENDING 1 /* signal pending */
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#define TIF_NEED_RESCHED 2 /* rescheduling necessary */
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#define TIF_POLLING_NRFLAG 3 /* true if poll_idle() is polling TIF_NEED_RESCHED */
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#define TIF_32BIT 4 /* 32 bit binary */
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#define TIF_MEMDIE 5 /* is terminating due to OOM killer */
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#define TIF_RESTORE_SIGMASK 6 /* restore saved signal mask */
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#define TIF_SYSCALL_AUDIT 7 /* syscall auditing active */
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#define TIF_NOTIFY_RESUME 8 /* callback before returning to user */
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#define TIF_SINGLESTEP 9 /* single stepping? */
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#define TIF_BLOCKSTEP 10 /* branch stepping? */
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#define TIF_SECCOMP 11 /* secure computing */
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#define TIF_SYSCALL_TRACEPOINT 12 /* syscall tracepoint instrumentation */
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#define _TIF_SYSCALL_TRACE (1 << TIF_SYSCALL_TRACE)
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#define _TIF_SIGPENDING (1 << TIF_SIGPENDING)
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#define _TIF_NEED_RESCHED (1 << TIF_NEED_RESCHED)
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#define _TIF_POLLING_NRFLAG (1 << TIF_POLLING_NRFLAG)
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#define _TIF_32BIT (1 << TIF_32BIT)
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#define _TIF_SYSCALL_AUDIT (1 << TIF_SYSCALL_AUDIT)
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#define _TIF_NOTIFY_RESUME (1 << TIF_NOTIFY_RESUME)
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#define _TIF_SINGLESTEP (1 << TIF_SINGLESTEP)
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#define _TIF_BLOCKSTEP (1 << TIF_BLOCKSTEP)
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#define _TIF_SECCOMP (1 << TIF_SECCOMP)
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#define _TIF_SYSCALL_TRACEPOINT (1 << TIF_SYSCALL_TRACEPOINT)
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#define _TIF_USER_WORK_MASK (_TIF_SIGPENDING | _TIF_NOTIFY_RESUME | \
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_TIF_NEED_RESCHED)
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#define _TIF_SYSCALL_TRACE_MASK (_TIF_SYSCALL_TRACE | _TIF_SINGLESTEP | \
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_TIF_BLOCKSTEP | _TIF_SYSCALL_AUDIT | \
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_TIF_SECCOMP | _TIF_SYSCALL_TRACEPOINT)
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#ifdef CONFIG_64BIT
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# ifdef CONFIG_COMPAT
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# define is_32bit_task() (test_thread_flag(TIF_32BIT))
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# else
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# define is_32bit_task() (0)
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# endif
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#else
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# define is_32bit_task() (1)
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#endif
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#endif /* __KERNEL__ */
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#endif /* _ASM_PARISC_THREAD_INFO_H */
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