[IA64] utrace syscall.h support for ia64
[linux-3.10.git] / arch / ia64 / kernel / ptrace.c
index 2a9943b..12b1e9f 100644 (file)
@@ -2199,3 +2199,68 @@ const struct user_regset_view *task_user_regset_view(struct task_struct *tsk)
 #endif
        return &user_ia64_view;
 }
+
+struct syscall_get_set_args {
+       unsigned int i;
+       unsigned int n;
+       unsigned long *args;
+       struct pt_regs *regs;
+       int rw;
+};
+
+static void syscall_get_set_args_cb(struct unw_frame_info *info, void *data)
+{
+       struct syscall_get_set_args *args = data;
+       struct pt_regs *pt = args->regs;
+       unsigned long *krbs, cfm, ndirty;
+       int i, count;
+
+       if (unw_unwind_to_user(info) < 0)
+               return;
+
+       cfm = pt->cr_ifs;
+       krbs = (unsigned long *)info->task + IA64_RBS_OFFSET/8;
+       ndirty = ia64_rse_num_regs(krbs, krbs + (pt->loadrs >> 19));
+
+       count = 0;
+       if (in_syscall(pt))
+               count = min_t(int, args->n, cfm & 0x7f);
+
+       for (i = 0; i < count; i++) {
+               if (args->rw)
+                       *ia64_rse_skip_regs(krbs, ndirty + i + args->i) =
+                               args->args[i];
+               else
+                       args->args[i] = *ia64_rse_skip_regs(krbs,
+                               ndirty + i + args->i);
+       }
+
+       if (!args->rw) {
+               while (i < args->n) {
+                       args->args[i] = 0;
+                       i++;
+               }
+       }
+}
+
+void ia64_syscall_get_set_arguments(struct task_struct *task,
+       struct pt_regs *regs, unsigned int i, unsigned int n,
+       unsigned long *args, int rw)
+{
+       struct syscall_get_set_args data = {
+               .i = i,
+               .n = n,
+               .args = args,
+               .regs = regs,
+               .rw = rw,
+       };
+
+       if (task == current)
+               unw_init_running(syscall_get_set_args_cb, &data);
+       else {
+               struct unw_frame_info ufi;
+               memset(&ufi, 0, sizeof(ufi));
+               unw_init_from_blocked_task(&ufi, task);
+               syscall_get_set_args_cb(&ufi, &data);
+       }
+}