Blackfin: add support for common FDPIC ptrace requests

The FDPIC arches support a standard set of ptrace requests so rather than
define our own custom API, hook up those requests for common code to
leverage.

Signed-off-by: Mike Frysinger <vapier@gentoo.org>

diff --git a/arch/blackfin/kernel/ptrace.c b/arch/blackfin/kernel/ptrace.c
index 271d7c63cef2a1c150d357437347ae4edd7baa7b..30f4828277ad8782ab8a909c7d98e5f6770bdfb4 100644 (file)
--- a/arch/blackfin/kernel/ptrace.c
+++ b/arch/blackfin/kernel/ptrace.c
@@ -285,9 +285,9 @@ long arch_ptrace(struct task_struct *child, long request, long addr, long data)
                                tmp = child->mm->start_data;
 #ifdef CONFIG_BINFMT_ELF_FDPIC
                        } else if (addr == (sizeof(struct pt_regs) + 12)) {
-                               tmp = child->mm->context.exec_fdpic_loadmap;
+                               goto case_PTRACE_GETFDPIC_EXEC;
                        } else if (addr == (sizeof(struct pt_regs) + 16)) {
-                               tmp = child->mm->context.interp_fdpic_loadmap;
+                               goto case_PTRACE_GETFDPIC_INTERP;
 #endif
                        } else {
                                tmp = get_reg(child, addr);
@@ -296,6 +296,28 @@ long arch_ptrace(struct task_struct *child, long request, long addr, long data)
                        break;
                }
 
+#ifdef CONFIG_BINFMT_ELF_FDPIC
+       case PTRACE_GETFDPIC: {
+               unsigned long tmp = 0;
+
+               switch (addr) {
+               case_PTRACE_GETFDPIC_EXEC:
+               case PTRACE_GETFDPIC_EXEC:
+                       tmp = child->mm->context.exec_fdpic_loadmap;
+                       break;
+               case_PTRACE_GETFDPIC_INTERP:
+               case PTRACE_GETFDPIC_INTERP:
+                       tmp = child->mm->context.interp_fdpic_loadmap;
+                       break;
+               default:
+                       break;
+               }
+
+               ret = put_user(tmp, datap);
+               break;
+       }
+#endif
+
                /* when I and D space are separate, this will have to be fixed. */
        case PTRACE_POKEDATA:
                pr_debug("ptrace: PTRACE_PEEKDATA\n");