metag: ftrace support

Add ftrace support for metag.

Signed-off-by: James Hogan <james.hogan@imgtec.com>
Cc: Frederic Weisbecker <fweisbec@gmail.com>
Cc: Ingo Molnar <mingo@redhat.com>
Reviewed-by: Steven Rostedt <rostedt@goodmis.org>

1 files changed, 13 insertions, 0 deletions

diff --git a/scripts/recordmcount.c b/scripts/recordmcount.c
index ee52cb8e17ad..9c22317778eb 100644
--- a/scripts/recordmcount.c
+++ b/scripts/recordmcount.c
@@ -33,6 +33,13 @@
 #include <string.h>
 #include <unistd.h>
 
+#ifndef EM_METAG
+/* Remove this when these make it to the standard system elf.h. */
+#define EM_METAG      174
+#define R_METAG_ADDR32                   2
+#define R_METAG_NONE                     3
+#endif
+
 static int fd_map;      /* File descriptor for file being modified. */
 static int mmap_failed; /* Boolean flag. */
 static void *ehdr_curr; /* current ElfXX_Ehdr *  for resource cleanup */
@@ -341,6 +348,12 @@ do_file(char const *const fname)
                          altmcount = "__gnu_mcount_nc";
                          break;
         case EM_IA_64:   reltype = R_IA64_IMM64;   gpfx = '_'; break;
+        case EM_METAG:   reltype = R_METAG_ADDR32;
+                         altmcount = "_mcount_wrapper";
+                         rel_type_nop = R_METAG_NONE;
+                         /* We happen to have the same requirement as MIPS */
+                         is_fake_mcount32 = MIPS32_is_fake_mcount;
+                         break;
         case EM_MIPS:    /* reltype: e_class    */ gpfx = '_'; break;
         case EM_PPC:     reltype = R_PPC_ADDR32;   gpfx = '_'; break;
         case EM_PPC64:   reltype = R_PPC64_ADDR64; gpfx = '_'; break;