1 files changed, 111 insertions, 0 deletions
diff --git a/libelf/gelf_getehdr.c b/libelf/gelf_getehdr.c
new file mode 100644
index 00000000..ea83fc04
--- /dev/null
+++ b/libelf/gelf_getehdr.c
@@ -0,0 +1,111 @@
+/* Get ELF header.
+   Copyright (C) 1998, 1999, 2000, 2001, 2002, 2005 Red Hat, Inc.
+   This file is part of elfutils.
+   Written by Ulrich Drepper <drepper@redhat.com>, 1998.
+
+   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/>.  */
+
+#ifdef HAVE_CONFIG_H
+# include <config.h>
+#endif
+
+#include <gelf.h>
+#include <stddef.h>
+#include <stdlib.h>
+#include <string.h>
+
+#include "libelfP.h"
+
+
+GElf_Ehdr *
+__gelf_getehdr_rdlock (elf, dest)
+     Elf *elf;
+     GElf_Ehdr *dest;
+{
+  GElf_Ehdr *result = NULL;
+
+  if (elf == NULL)
+    return NULL;
+
+  if (unlikely (elf->kind != ELF_K_ELF))
+    {
+      __libelf_seterrno (ELF_E_INVALID_HANDLE);
+      return NULL;
+    }
+
+  /* The following is an optimization: the ehdr element is at the same
+     position in both the elf32 and elf64 structure.  */
+  if (offsetof (struct Elf, state.elf32.ehdr)
+      != offsetof (struct Elf, state.elf64.ehdr))
+    abort ();
+  /* Just pick one of the values.  */
+ if (unlikely (elf->state.elf64.ehdr == NULL))
+    /* Maybe no ELF header was created yet.  */
+    __libelf_seterrno (ELF_E_WRONG_ORDER_EHDR);
+  else if (elf->class == ELFCLASS32)
+    {
+      Elf32_Ehdr *ehdr = elf->state.elf32.ehdr;
+
+      /* Convert the 32-bit struct to an 64-bit one.  */
+      memcpy (dest->e_ident, ehdr->e_ident, EI_NIDENT);
+#define COPY(name) \
+      dest->name = ehdr->name
+      COPY (e_type);
+      COPY (e_machine);
+      COPY (e_version);
+      COPY (e_entry);
+      COPY (e_phoff);
+      COPY (e_shoff);
+      COPY (e_flags);
+      COPY (e_ehsize);
+      COPY (e_phentsize);
+      COPY (e_phnum);
+      COPY (e_shentsize);
+      COPY (e_shnum);
+      COPY (e_shstrndx);
+
+      result = dest;
+    }
+  else
+    result = memcpy (dest, elf->state.elf64.ehdr, sizeof (*dest));
+
+  return result;
+}
+
+GElf_Ehdr *
+gelf_getehdr (elf, dest)
+     Elf *elf;
+     GElf_Ehdr *dest;
+{
+  GElf_Ehdr *result;
+  if (elf == NULL)
+    return NULL;
+
+  rwlock_rdlock (elf->lock);
+  result = __gelf_getehdr_rdlock (elf, dest);
+  rwlock_unlock (elf->lock);
+
+  return result;
+}