Initial import

1 files changed, 67 insertions, 0 deletions

diff --git a/arch/cris/kernel/ptrace.c b/arch/cris/kernel/ptrace.c
new file mode 100644
index 000000000..fd3427e56
--- /dev/null
+++ b/arch/cris/kernel/ptrace.c
@@ -0,0 +1,67 @@
+/*
+ *  linux/arch/cris/kernel/ptrace.c
+ *
+ * Parts taken from the m68k port.
+ *
+ * Copyright (c) 2000, 2001, 2002 Axis Communications AB
+ *
+ * Authors:   Bjorn Wesen
+ *
+ */
+
+#include <linux/kernel.h>
+#include <linux/sched.h>
+#include <linux/mm.h>
+#include <linux/smp.h>
+#include <linux/errno.h>
+#include <linux/ptrace.h>
+#include <linux/user.h>
+#include <linux/tracehook.h>
+
+#include <asm/uaccess.h>
+#include <asm/page.h>
+#include <asm/pgtable.h>
+#include <asm/processor.h>
+
+
+/* notification of userspace execution resumption
+ * - triggered by current->work.notify_resume
+ */
+extern int do_signal(int canrestart, struct pt_regs *regs);
+
+
+void do_notify_resume(int canrestart, struct pt_regs *regs,
+		      __u32 thread_info_flags)
+{
+	/* deal with pending signal delivery */
+	if (thread_info_flags & _TIF_SIGPENDING)
+		do_signal(canrestart,regs);
+
+	if (thread_info_flags & _TIF_NOTIFY_RESUME) {
+		clear_thread_flag(TIF_NOTIFY_RESUME);
+		tracehook_notify_resume(regs);
+	}
+}
+
+void do_work_pending(int syscall, struct pt_regs *regs,
+		     unsigned int thread_flags)
+{
+	do {
+		if (likely(thread_flags & _TIF_NEED_RESCHED)) {
+			schedule();
+		} else {
+			if (unlikely(!user_mode(regs)))
+				return;
+			local_irq_enable();
+			if (thread_flags & _TIF_SIGPENDING) {
+				do_signal(syscall, regs);
+				syscall = 0;
+			} else {
+				clear_thread_flag(TIF_NOTIFY_RESUME);
+				tracehook_notify_resume(regs);
+			}
+		}
+		local_irq_disable();
+		thread_flags = current_thread_info()->flags;
+	} while (thread_flags & _TIF_WORK_MASK);
+}