1 files changed, 146 insertions, 0 deletions
diff --git a/backends/common-reloc.c b/backends/common-reloc.c
new file mode 100644
index 00000000..2667ec4a
--- /dev/null
+++ b/backends/common-reloc.c
@@ -0,0 +1,146 @@
+/* Common code for ebl reloc functions.
+   Copyright (C) 2005, 2006 Red Hat, Inc.
+   This file is part of elfutils.
+
+   This file is free software; you can redistribute it and/or modify
+   it under the terms of either
+
+     * the GNU Lesser General Public License as published by the Free
+       Software Foundation; either version 3 of the License, or (at
+       your option) any later version
+
+   or
+
+     * the GNU General Public License as published by the Free
+       Software Foundation; either version 2 of the License, or (at
+       your option) any later version
+
+   or both in parallel, as here.
+
+   elfutils is distributed in the hope that it will be useful, but
+   WITHOUT ANY WARRANTY; without even the implied warranty of
+   MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the GNU
+   General Public License for more details.
+
+   You should have received copies of the GNU General Public License and
+   the GNU Lesser General Public License along with this program.  If
+   not, see <http://www.gnu.org/licenses/>.  */
+
+#include "libebl_CPU.h"
+#include <assert.h>
+
+#define R_TYPE(name)		PASTE (RELOC_PREFIX, name)
+#define PASTE(a, b)		PASTE_1 (a, b)
+#define PASTE_1(a, b)		a##b
+#define R_NAME(name)		R_NAME_1 (RELOC_PREFIX, name)
+#define R_NAME_1(prefix, type)	R_NAME_2 (prefix, type)
+#define R_NAME_2(prefix, type)	#prefix #type
+
+#define RELOC_TYPES		STRINGIFIED_PASTE (BACKEND, reloc.def)
+#define STRINGIFIED_PASTE(a, b)	STRINGIFY (PASTE (a, b))
+#define STRINGIFY(x)		STRINGIFY_1 (x)
+#define STRINGIFY_1(x)		#x
+
+/* Provide a table of reloc type names, in a PIC-friendly fashion.  */
+
+static const struct EBLHOOK(reloc_nametable)
+{
+  char zero;
+#define	RELOC_TYPE(type, uses) \
+  char name_##type[sizeof R_NAME (type)];
+#include RELOC_TYPES
+#undef RELOC_TYPE
+} EBLHOOK(reloc_nametable) =
+  {
+    '\0',
+#define	RELOC_TYPE(type, uses) R_NAME (type),
+#include RELOC_TYPES
+#undef RELOC_TYPE
+  };
+#define reloc_namestr (&EBLHOOK(reloc_nametable).zero)
+
+static const uint_fast16_t EBLHOOK(reloc_nameidx)[] =
+{
+#define	RELOC_TYPE(type, uses) \
+  [R_TYPE (type)] = offsetof (struct EBLHOOK(reloc_nametable), name_##type),
+#include RELOC_TYPES
+#undef RELOC_TYPE
+};
+#define nreloc \
+  ((int) (sizeof EBLHOOK(reloc_nameidx) / sizeof EBLHOOK(reloc_nameidx)[0]))
+
+#define REL	(1 << (ET_REL - 1))
+#define EXEC	(1 << (ET_EXEC - 1))
+#define DYN	(1 << (ET_DYN - 1))
+static const uint8_t EBLHOOK(reloc_valid)[] =
+{
+#define	RELOC_TYPE(type, uses) [R_TYPE (type)] = uses,
+#include RELOC_TYPES
+#undef RELOC_TYPE
+};
+#undef REL
+#undef EXEC
+#undef DYN
+
+const char *
+EBLHOOK(reloc_type_name) (int reloc,
+			  char *buf __attribute__ ((unused)),
+			  size_t len __attribute__ ((unused)))
+{
+  if (reloc >= 0 && reloc < nreloc && EBLHOOK(reloc_nameidx)[reloc] != 0)
+    return &reloc_namestr[EBLHOOK(reloc_nameidx)[reloc]];
+  return NULL;
+}
+
+bool
+EBLHOOK(reloc_type_check) (int reloc)
+{
+  return reloc >= 0 && reloc < nreloc && EBLHOOK(reloc_nameidx)[reloc] != 0;
+}
+
+bool
+EBLHOOK(reloc_valid_use) (Elf *elf, int reloc)
+{
+  uint8_t uses = EBLHOOK(reloc_valid)[reloc];
+
+  GElf_Ehdr ehdr_mem;
+  GElf_Ehdr *ehdr = gelf_getehdr (elf, &ehdr_mem);
+  assert (ehdr != NULL);
+  uint8_t type = ehdr->e_type;
+
+  return type > ET_NONE && type < ET_CORE && (uses & (1 << (type - 1)));
+}
+
+
+bool
+EBLHOOK(copy_reloc_p) (int reloc)
+{
+  return reloc == R_TYPE (COPY);
+}
+
+bool
+EBLHOOK(none_reloc_p) (int reloc)
+{
+  return reloc == R_TYPE (NONE);
+}
+
+#ifndef NO_RELATIVE_RELOC
+bool
+EBLHOOK(relative_reloc_p) (int reloc)
+{
+  return reloc == R_TYPE (RELATIVE);
+}
+#endif
+
+static void
+EBLHOOK(init_reloc) (Ebl *ebl)
+{
+  ebl->reloc_type_name = EBLHOOK(reloc_type_name);
+  ebl->reloc_type_check = EBLHOOK(reloc_type_check);
+  ebl->reloc_valid_use = EBLHOOK(reloc_valid_use);
+  ebl->copy_reloc_p = EBLHOOK(copy_reloc_p);
+  ebl->none_reloc_p = EBLHOOK(none_reloc_p);
+#ifndef NO_RELATIVE_RELOC
+  ebl->relative_reloc_p = EBLHOOK(relative_reloc_p);
+#endif
+}