[SPARC64]: Add dummy PTRACE_PEEKUSR for gdb.

GDB uses a PTRACE_PEEKUSR call with offset 0 to see
if a thread is alive, so provide a success return for
this particular special case.

Signed-off-by: David S. Miller <davem@davemloft.net>

diff --git a/arch/sparc64/kernel/ptrace.c b/arch/sparc64/kernel/ptrace.c
index eb93e9c..c910af5 100644 (file)
--- a/arch/sparc64/kernel/ptrace.c
+++ b/arch/sparc64/kernel/ptrace.c
@@ -244,6 +244,13 @@ asmlinkage void do_ptrace(struct pt_regs *regs)
        }
 
        switch(request) {
+       case PTRACE_PEEKUSR:
+               if (addr != 0)
+                       pt_error_return(regs, EIO);
+               else
+                       pt_succ_return(regs, 0);
+               goto out_tsk;
+
        case PTRACE_PEEKTEXT: /* read word at location addr. */ 
        case PTRACE_PEEKDATA: {
                unsigned long tmp64;