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Date: Wed, 11 Nov 2009 22:31:55 +0100 From: Oleg Nesterov <oleg@...hat.com> To: Andrew Morton <akpm@...ux-foundation.org> Cc: Benjamin Herrenschmidt <benh@...nel.crashing.org>, Roland McGrath <roland@...hat.com>, linux-kernel@...r.kernel.org Subject: [PATCH 1/5] ptrace: introduce user_single_step_siginfo() helper Suggested by Roland. Currently there is no way to synthesize a single-stepping trap in the arch-independent manner. This patch adds the default helper which fills siginfo_t, arch/ can can override it. Signed-off-by: Oleg Nesterov <oleg@...hat.com> Acked-by: Roland McGrath <roland@...hat.com> --- include/linux/ptrace.h | 12 ++++++++++++ 1 file changed, 12 insertions(+) --- TH/include/linux/ptrace.h~1_DEFAULT_HELPER 2009-11-10 01:03:24.000000000 +0100 +++ TH/include/linux/ptrace.h 2009-11-10 21:31:25.000000000 +0100 @@ -273,6 +273,18 @@ static inline void user_enable_block_ste } #endif /* arch_has_block_step */ +#ifdef ARCH_HAS_USER_SINGLE_STEP_INFO +extern void user_single_step_siginfo(struct task_struct *tsk, + struct pt_regs *regs, siginfo_t *info); +#else +static inline void user_single_step_siginfo(struct task_struct *tsk, + struct pt_regs *regs, siginfo_t *info) +{ + memset(info, 0, sizeof(*info)); + info->si_signo = SIGTRAP; +} +#endif + #ifndef arch_ptrace_stop_needed /** * arch_ptrace_stop_needed - Decide whether arch_ptrace_stop() should be called -- To unsubscribe from this list: send the line "unsubscribe linux-kernel" in the body of a message to majordomo@...r.kernel.org More majordomo info at http://vger.kernel.org/majordomo-info.html Please read the FAQ at http://www.tux.org/lkml/
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