auto import from //depot/cupcake/@135843

1 files changed, 88 insertions, 0 deletions

diff --git a/libelf/gelf_getehdr.c b/libelf/gelf_getehdr.c
new file mode 100644
index 00000000..6b926442
--- /dev/null
+++ b/libelf/gelf_getehdr.c
@@ -0,0 +1,88 @@
+/* Get ELF header.
+   Copyright (C) 1998, 1999, 2000, 2001, 2002 Red Hat, Inc.
+   Written by Ulrich Drepper <drepper@redhat.com>, 1998.
+
+   This program is free software; you can redistribute it and/or modify
+   it under the terms of the GNU General Public License as published by
+   the Free Software Foundation, version 2.
+
+   This program 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 a copy of the GNU General Public License
+   along with this program; if not, write to the Free Software Foundation,
+   Inc., 59 Temple Place - Suite 330, Boston, MA 02111-1307, USA.  */
+
+#ifdef HAVE_CONFIG_H
+# include <config.h>
+#endif
+
+#include <gelf.h>
+#include <string.h>
+
+#include "libelfP.h"
+
+
+GElf_Ehdr *
+gelf_getehdr (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;
+    }
+
+  rwlock_rdlock (elf->lock);
+
+  if (elf->class == ELFCLASS32)
+    {
+      Elf32_Ehdr *ehdr = elf->state.elf32.ehdr;
+
+      /* Maybe no ELF header was created yet.  */
+      if (ehdr == NULL)
+	__libelf_seterrno (ELF_E_WRONG_ORDER_EHDR);
+      else
+	{
+	  /* 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
+    {
+      /* Maybe no ELF header was created yet.  */
+      if (elf->state.elf64.ehdr == NULL)
+	__libelf_seterrno (ELF_E_WRONG_ORDER_EHDR);
+      else
+	result = memcpy (dest, elf->state.elf64.ehdr, sizeof (*dest));
+    }
+
+  rwlock_unlock (elf->lock);
+
+  return result;
+}