metag: Add support for loading shared objects into core memories.

Signed-off-by: Markos Chandras <markos.chandras@imgtec.com>
Signed-off-by: Bernhard Reutner-Fischer <rep.dot.nop@gmail.com>

ldso/ldso/metag/dl-inlines.h

@@ -0,0 +1,39 @@
+/*
+ * Copyright (C) 2013, Imagination Technologies Ltd.
+ *
+ * Licensed under LGPL v2.1 or later, see the file COPYING.LIB in this tarball.
+ */
+
+static __always_inline int
+__dl_is_special_segment (Elf32_Ehdr *epnt,
+			 Elf32_Phdr *ppnt)
+{
+  if (ppnt->p_type != PT_LOAD &&
+      ppnt->p_type != PT_DYNAMIC)
+    return 0;
+
+  if (ppnt->p_vaddr >= 0x80000000 &&
+      ppnt->p_vaddr < 0x82060000)
+    return 1;
+
+  if (ppnt->p_vaddr >= 0xe0200000 &&
+      ppnt->p_vaddr < 0xe0260000)
+    return 1;
+
+  return 0;
+}
+
+static __always_inline char *
+__dl_map_segment (Elf32_Ehdr *epnt,
+		  Elf32_Phdr *ppnt,
+		  int infile,
+		  int flags)
+{
+  char *addr = (char *)ppnt->p_vaddr;
+
+  if (_DL_PREAD (infile, addr, ppnt->p_filesz, ppnt->p_offset) != ppnt->p_filesz) {
+    return 0;
+  }
+
+  return addr;
+}

ldso/ldso/metag/dl-sysdep.h

@@ -96,3 +96,28 @@ elf_machine_relative(Elf32_Addr load_off, const Elf32_Addr rel_addr,
 }
 
 #define DL_MALLOC_ALIGN 8
+
+#define HAVE_DL_INLINES_H
+
+#define DL_IS_SPECIAL_SEGMENT(EPNT, PPNT) \
+  __dl_is_special_segment(EPNT, PPNT)
+#define DL_MAP_SEGMENT(EPNT, PPNT, INFILE, FLAGS) \
+  __dl_map_segment (EPNT, PPNT, INFILE, FLAGS)
+
+#define DL_CHECK_LIB_TYPE(epnt, piclib, _dl_progname, libname) \
+do \
+{ \
+  ElfW(Phdr) *ppnt_; \
+  char *header_ = (char *)epnt;				   \
+  ppnt_ = (ElfW(Phdr) *)(intptr_t) & header_[epnt->e_phoff]; \
+  if (ppnt_->p_vaddr >= 0x80000000 && \
+      ppnt_->p_vaddr < 0x82060000) \
+    (piclib) = 2; \
+  if (ppnt_->p_vaddr >= 0xe0200000 && \
+      ppnt_->p_vaddr < 0xe0260000) \
+    (piclib) = 2; \
+} \
+while (0)
+
+#define _DL_PREAD(FD, BUF, SIZE, OFFSET) \
+  (_dl_pread((FD), (BUF), (SIZE), (OFFSET)))