+static int set_flags(struct task_struct *task, unsigned long value)
+{
+ struct pt_regs *regs = task_pt_regs(task);
+
+ /*
+ * If the user value contains TF, mark that
+ * it was not "us" (the debugger) that set it.
+ * If not, make sure it stays set if we had.
+ */
+ if (value & X86_EFLAGS_TF)
+ clear_tsk_thread_flag(task, TIF_FORCED_TF);
+ else if (test_tsk_thread_flag(task, TIF_FORCED_TF))
+ value |= X86_EFLAGS_TF;
+
+ regs->flags = (regs->flags & ~FLAG_MASK) | (value & FLAG_MASK);
+
+ return 0;
+}
+
+static int putreg(struct task_struct *child,
+ unsigned long offset, unsigned long value)
+{
+ switch (offset) {
+ case offsetof(struct user_regs_struct, cs):
+ case offsetof(struct user_regs_struct, ds):
+ case offsetof(struct user_regs_struct, es):
+ case offsetof(struct user_regs_struct, fs):
+ case offsetof(struct user_regs_struct, gs):
+ case offsetof(struct user_regs_struct, ss):
+ return set_segment_reg(child, offset, value);
+
+ case offsetof(struct user_regs_struct, flags):
+ return set_flags(child, value);
+ }
+
+ *pt_regs_access(task_pt_regs(child), offset) = value;
+ return 0;
+}
+
+static unsigned long getreg(struct task_struct *task, unsigned long offset)
+{
+ switch (offset) {
+ case offsetof(struct user_regs_struct, cs):
+ case offsetof(struct user_regs_struct, ds):
+ case offsetof(struct user_regs_struct, es):
+ case offsetof(struct user_regs_struct, fs):
+ case offsetof(struct user_regs_struct, gs):
+ case offsetof(struct user_regs_struct, ss):
+ return get_segment_reg(task, offset);
+
+ case offsetof(struct user_regs_struct, flags):
+ return get_flags(task);
+ }
+
+ return *pt_regs_access(task_pt_regs(task), offset);
+}
+