From 7d43e57764fe6922703c36d8d0d56a7ead21f03d Mon Sep 17 00:00:00 2001 From: Benjamin Herrenschmidt Date: Thu, 24 May 2007 15:41:04 +1000 Subject: [PATCH] [POWERPC] Fix ppc32 single-stepping out of syscalls The ppc32 kernel didn't properly set/clear the TIF_SINGLESTEP flag, causing return from syscalls to not SIGTRAP, thus executing one more instruction before stopping again. This fixes it. The ptrace code is a bit of a mess, and is overdue for at least a -proper- 32/64 bits split and possibly more cleanups but this minimum fix should be ok for 2.6.22 Signed-off-by: Benjamin Herrenschmidt Signed-off-by: Paul Mackerras --- arch/powerpc/kernel/ptrace.c | 2 ++ 1 file changed, 2 insertions(+) diff --git a/arch/powerpc/kernel/ptrace.c b/arch/powerpc/kernel/ptrace.c index f4f391cdd8..bf76562167 100644 --- a/arch/powerpc/kernel/ptrace.c +++ b/arch/powerpc/kernel/ptrace.c @@ -218,6 +218,7 @@ set_single_step(struct task_struct *task) regs->msr |= MSR_SE; #endif } + set_tsk_thread_flag(task, TIF_SINGLESTEP); } static inline void @@ -233,6 +234,7 @@ clear_single_step(struct task_struct *task) regs->msr &= ~MSR_SE; #endif } + clear_tsk_thread_flag(task, TIF_SINGLESTEP); } #endif /* CONFIG_PPC32 */ -- 2.39.5