Squashed 'third_party/elfutils/' content from commit 555e15e
Change-Id: I61cde98949e47e5c8c09c33260de17f30921be79
git-subtree-dir: third_party/elfutils
git-subtree-split: 555e15ebe8bf1eb33d00747173cfc80cc65648a4
diff --git a/libelf/gelf_update_dyn.c b/libelf/gelf_update_dyn.c
new file mode 100644
index 0000000..5c515d2
--- /dev/null
+++ b/libelf/gelf_update_dyn.c
@@ -0,0 +1,107 @@
+/* Update information in dynamic table at the given index.
+ Copyright (C) 2000, 2001, 2002, 2005, 2009, 2014, 2015 Red Hat, Inc.
+ This file is part of elfutils.
+ Written by Ulrich Drepper <drepper@redhat.com>, 2000.
+
+ 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 <string.h>
+
+#include "libelfP.h"
+
+
+int
+gelf_update_dyn (Elf_Data *data, int ndx, GElf_Dyn *src)
+{
+ Elf_Data_Scn *data_scn = (Elf_Data_Scn *) data;
+ Elf_Scn *scn;
+ int result = 0;
+
+ if (data == NULL)
+ return 0;
+
+ if (unlikely (data_scn->d.d_type != ELF_T_DYN))
+ {
+ /* The type of the data better should match. */
+ __libelf_seterrno (ELF_E_DATA_MISMATCH);
+ return 0;
+ }
+
+ scn = data_scn->s;
+ rwlock_wrlock (scn->elf->lock);
+
+ if (scn->elf->class == ELFCLASS32)
+ {
+ Elf32_Dyn *dyn;
+
+ /* There is the possibility that the values in the input are
+ too large. */
+ if (unlikely (src->d_tag < -0x80000000ll)
+ || unlikely (src->d_tag > 0x7fffffffll)
+ || unlikely (src->d_un.d_val > 0xffffffffull))
+ {
+ __libelf_seterrno (ELF_E_INVALID_DATA);
+ goto out;
+ }
+
+ /* Check whether we have to resize the data buffer. */
+ if (INVALID_NDX (ndx, Elf32_Dyn, &data_scn->d))
+ {
+ __libelf_seterrno (ELF_E_INVALID_INDEX);
+ goto out;
+ }
+
+ dyn = &((Elf32_Dyn *) data_scn->d.d_buf)[ndx];
+
+ dyn->d_tag = src->d_tag;
+ dyn->d_un.d_val = src->d_un.d_val;
+ }
+ else
+ {
+ /* Check whether we have to resize the data buffer. */
+ if (INVALID_NDX (ndx, Elf64_Dyn, &data_scn->d))
+ {
+ __libelf_seterrno (ELF_E_INVALID_INDEX);
+ goto out;
+ }
+
+ ((Elf64_Dyn *) data_scn->d.d_buf)[ndx] = *src;
+ }
+
+ result = 1;
+
+ /* Mark the section as modified. */
+ scn->flags |= ELF_F_DIRTY;
+
+ out:
+ rwlock_unlock (scn->elf->lock);
+
+ return result;
+}