sh: Initial ELF FDPIC support.

This adds initial support for ELF FDPIC on MMU-less SH, as per version
0.2 of the ABI definition at:

	http://www.codesourcery.com/public/docs/sh-fdpic/sh-fdpic-abi.txt

Signed-off-by: Paul Mundt <lethal@linux-sh.org>

1 files changed, 23 insertions, 0 deletions

diff --git a/arch/sh/kernel/ptrace_32.c b/arch/sh/kernel/ptrace_32.c
index fddb547f3c2b..2bc72def5cf8 100644
--- a/arch/sh/kernel/ptrace_32.c
+++ b/arch/sh/kernel/ptrace_32.c
@@ -241,6 +241,29 @@ long arch_ptrace(struct task_struct *child, long request, long addr, long data)
                 break;
         }
 #endif
+#ifdef CONFIG_BINFMT_ELF_FDPIC
+        case PTRACE_GETFDPIC: {
+                unsigned long tmp = 0;
+
+                switch (addr) {
+                case PTRACE_GETFDPIC_EXEC:
+                        tmp = child->mm->context.exec_fdpic_loadmap;
+                        break;
+                case PTRACE_GETFDPIC_INTERP:
+                        tmp = child->mm->context.interp_fdpic_loadmap;
+                        break;
+                default:
+                        break;
+                }
+
+                ret = 0;
+                if (put_user(tmp, (unsigned long *) data)) {
+                        ret = -EFAULT;
+                        break;
+                }
+                break;
+        }
+#endif
         default:
                 ret = ptrace_request(child, request, addr, data);
                 break;