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>

1 files changed, 24 insertions, 2 deletions

diff --git a/arch/blackfin/kernel/ptrace.c b/arch/blackfin/kernel/ptrace.c
index 271d7c63cef..30f4828277a 100644
--- 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");