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 fddb547f3c2..2bc72def5cf 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;