Commit cb4c173d authored by Mike Frysinger's avatar Mike Frysinger Committed by Bryan Wu
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Blackfin arch: use existing ptrace_disable() func to clear TRACE_BITS and... 


Blackfin arch: use existing ptrace_disable() func to clear TRACE_BITS and create the opposite ptrace_enable()

Signed-off-by: default avatarMike Frysinger <vapier.adi@gmail.com>
Signed-off-by: default avatarBryan Wu <cooloney@kernel.org>
parent d3ab3a62

arch/blackfin/kernel/ptrace.c

+37 −50
Original line number Diff line number Diff line
@@ -175,6 +175,13 @@ static inline int is_user_addr_valid(struct task_struct *child, 
	return -EIO;

}



void ptrace_enable(struct task_struct *child)

{

	unsigned long tmp;

	tmp = get_reg(child, PT_SYSCFG) | (TRACE_BITS);

	put_reg(child, PT_SYSCFG, tmp);

}



/*

 * Called by kernel/ptrace.c when detaching..

 *
@@ -347,10 +354,7 @@ long arch_ptrace(struct task_struct *child, long request, long addr, long data) 
		break;



	case PTRACE_SYSCALL:	/* continue and stop at next (return from) syscall */

	case PTRACE_CONT:

		{		/* restart after signal. */

			long tmp;



	case PTRACE_CONT:	/* restart after signal. */

		pr_debug("ptrace: syscall/cont\n");



		ret = -EIO;
@@ -360,16 +364,12 @@ long arch_ptrace(struct task_struct *child, long request, long addr, long data) 
			set_tsk_thread_flag(child, TIF_SYSCALL_TRACE);

		else

			clear_tsk_thread_flag(child, TIF_SYSCALL_TRACE);



		child->exit_code = data;

			/* make sure the single step bit is not set. */

			tmp = get_reg(child, PT_SYSCFG) & ~(TRACE_BITS);

			put_reg(child, PT_SYSCFG, tmp);

		ptrace_disable(child);

		pr_debug("ptrace: before wake_up_process\n");

		wake_up_process(child);

		ret = 0;

		break;

		}



	/*

	 * make the child exit.  Best I can do is send it a sigkill.
@@ -377,38 +377,25 @@ long arch_ptrace(struct task_struct *child, long request, long addr, long data) 
	 * exit.

	 */

	case PTRACE_KILL:

		{

			long tmp;

		ret = 0;

		if (child->exit_state == EXIT_ZOMBIE)	/* already dead */

			break;

		child->exit_code = SIGKILL;

			/* make sure the single step bit is not set. */

			tmp = get_reg(child, PT_SYSCFG) & ~(TRACE_BITS);

			put_reg(child, PT_SYSCFG, tmp);

		ptrace_disable(child);

		wake_up_process(child);

		break;

		}



	case PTRACE_SINGLESTEP:

		{		/* set the trap flag. */

			long tmp;



	case PTRACE_SINGLESTEP:	/* set the trap flag. */

		pr_debug("ptrace: single step\n");

		ret = -EIO;

		if (!valid_signal(data))

			break;

		clear_tsk_thread_flag(child, TIF_SYSCALL_TRACE);



			tmp = get_reg(child, PT_SYSCFG) | (TRACE_BITS);

			put_reg(child, PT_SYSCFG, tmp);



		ptrace_enable(child);

		child->exit_code = data;

			/* give it a chance to run. */

		wake_up_process(child);

		ret = 0;

		break;

		}



	case PTRACE_GETREGS:

		/* Get all gp regs from the child. */