m68knommu: use generic ptrace_resume code

Use the generic ptrace_resume code for PTRACE_SYSCALL, PTRACE_CONT,
PTRACE_KILL and PTRACE_SINGLESTEP.  m68knommu already defines the
nessecary user_enable_single_step and user_disable_single_step functions
for this.

Also the TIF_SYSCALL_TRACE thread flag is now cleared on PTRACE_KILL which
it previously wasn't which is consistent with all architectures using the
modern ptrace code.

Signed-off-by: Christoph Hellwig <hch@lst.de>
Cc: Oleg Nesterov <oleg@redhat.com>
Cc: Roland McGrath <roland@redhat.com>
Acked-by: Greg Ungerer <gerg@uclinux.org>
Signed-off-by: Andrew Morton <akpm@linux-foundation.org>
Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>

diff --git a/arch/m68knommu/kernel/ptrace.c b/arch/m68knommu/kernel/ptrace.c
index b100394..f6be124 100644 (file)
--- a/arch/m68knommu/kernel/ptrace.c
+++ b/arch/m68knommu/kernel/ptrace.c
@@ -190,62 +190,6 @@ 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;
-
-                       ret = -EIO;
-                       if (!valid_signal(data))
-                               break;
-                       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 bit is not set. */
-                       tmp = get_reg(child, PT_SR) & ~(TRACE_BITS << 16);
-                       put_reg(child, PT_SR, tmp);
-                       wake_up_process(child);
-                       ret = 0;
-                       break;
-               }
-
-               /*
-                * 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.
-                */
-               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_SR) & ~(TRACE_BITS << 16);
-                       put_reg(child, PT_SR, tmp);
-                       wake_up_process(child);
-                       break;
-               }
-
-               case PTRACE_SINGLESTEP: {  /* set the trap flag. */
-                       long tmp;
-
-                       ret = -EIO;
-                       if (!valid_signal(data))
-                               break;
-                       clear_tsk_thread_flag(child, TIF_SYSCALL_TRACE);
-                       tmp = get_reg(child, PT_SR) | (TRACE_BITS << 16);
-                       put_reg(child, PT_SR, tmp);
-
-                       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. */
                        int i;
                        unsigned long tmp;