[IA64] remove duplicate code from arch_ptrace()

Remove all code which does exactly the same thing as ptrace_request().

Signed-off-by: Petr Tesarik <ptesarik@suse.cz>
Signed-off-by: Tony Luck <tony.luck@intel.com>

2 files changed, 36 insertions, 67 deletions

diff --git a/arch/ia64/kernel/ptrace.c b/arch/ia64/kernel/ptrace.c
index 1dfff5a8f365..f10c8b40dd3f 100644
--- a/arch/ia64/kernel/ptrace.c
+++ b/arch/ia64/kernel/ptrace.c
@@ -1454,6 +1454,35 @@ ptrace_setregs (struct task_struct *child, struct pt_all_user_regs __user *ppr)
         return ret;
 }
 
+void
+user_enable_single_step (struct task_struct *child)
+{
+        struct ia64_psr *child_psr = ia64_psr(task_pt_regs(child));
+
+        set_tsk_thread_flag(child, TIF_SINGLESTEP);
+        child_psr->ss = 1;
+}
+
+void
+user_enable_block_step (struct task_struct *child)
+{
+        struct ia64_psr *child_psr = ia64_psr(task_pt_regs(child));
+
+        set_tsk_thread_flag(child, TIF_SINGLESTEP);
+        child_psr->tb = 1;
+}
+
+void
+user_disable_single_step (struct task_struct *child)
+{
+        struct ia64_psr *child_psr = ia64_psr(task_pt_regs(child));
+
+        /* make sure the single step/taken-branch trap bits are not set: */
+        clear_tsk_thread_flag(child, TIF_SINGLESTEP);
+        child_psr->ss = 0;
+        child_psr->tb = 0;
+}
+
 /*
  * Called by kernel/ptrace.c when detaching..
  *
@@ -1528,73 +1557,6 @@ arch_ptrace (struct task_struct *child, long request, long addr, long data)
                 ret = ptrace_request(child, PTRACE_SETSIGINFO, addr, data);
                 goto out_tsk;
 
-              case PTRACE_SYSCALL:
-                /* continue and stop at next (return from) syscall */
-              case PTRACE_CONT:
-                /* restart after signal. */
-                ret = -EIO;
-                if (!valid_signal(data))
-                        goto out_tsk;
-                if (request == PTRACE_SYSCALL)
-                        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/taken-branch trap bits
-                 * are not set:
-                 */
-                clear_tsk_thread_flag(child, TIF_SINGLESTEP);
-                ia64_psr(pt)->ss = 0;
-                ia64_psr(pt)->tb = 0;
-
-                wake_up_process(child);
-                ret = 0;
-                goto out_tsk;
-
-              case PTRACE_KILL:
-                /*
-                 * Make the child exit.  Best I can do is send it a
-                 * sigkill.  Perhaps it should be put in the status
-                 * that it wants to exit.
-                 */
-                if (child->exit_state == EXIT_ZOMBIE)
-                        /* already dead */
-                        return 0;
-                child->exit_code = SIGKILL;
-
-                ptrace_disable(child);
-                wake_up_process(child);
-                ret = 0;
-                goto out_tsk;
-
-              case PTRACE_SINGLESTEP:
-                /* let child execute for one instruction */
-              case PTRACE_SINGLEBLOCK:
-                ret = -EIO;
-                if (!valid_signal(data))
-                        goto out_tsk;
-
-                clear_tsk_thread_flag(child, TIF_SYSCALL_TRACE);
-                set_tsk_thread_flag(child, TIF_SINGLESTEP);
-                if (request == PTRACE_SINGLESTEP) {
-                        ia64_psr(pt)->ss = 1;
-                } else {
-                        ia64_psr(pt)->tb = 1;
-                }
-                child->exit_code = data;
-
-                /* give it a chance to run. */
-                wake_up_process(child);
-                ret = 0;
-                goto out_tsk;
-
-              case PTRACE_DETACH:
-                /* detach a process that was attached. */
-                ret = ptrace_detach(child, data);
-                goto out_tsk;
-
               case PTRACE_GETREGS:
                 ret = ptrace_getregs(child,
                                      (struct pt_all_user_regs __user *) data);
diff --git a/include/asm-ia64/ptrace.h b/include/asm-ia64/ptrace.h
index 5b5234098783..4b2a8d40ebc5 100644
--- a/include/asm-ia64/ptrace.h
+++ b/include/asm-ia64/ptrace.h
@@ -312,6 +312,13 @@ struct switch_stack {
   #define arch_ptrace_attach(child) \
         ptrace_attach_sync_user_rbs(child)
 
+  #define arch_has_single_step()  (1)
+  extern void user_enable_single_step(struct task_struct *);
+  extern void user_disable_single_step(struct task_struct *);
+
+  #define arch_has_block_step()   (1)
+  extern void user_enable_block_step(struct task_struct *);
+
 #endif /* !__KERNEL__ */
 
 /* pt_all_user_regs is used for PTRACE_GETREGS PTRACE_SETREGS */