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/elf_getscn.c b/libelf/elf_getscn.c
new file mode 100644
index 0000000..9f7213b
--- /dev/null
+++ b/libelf/elf_getscn.c
@@ -0,0 +1,87 @@
+/* Get section at specific index.
+ Copyright (C) 1998, 1999, 2000, 2001, 2002, 2004, 2015 Red Hat, Inc.
+ This file is part of elfutils.
+ Contributed 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 <assert.h>
+#include <stddef.h>
+#include <stdlib.h>
+
+#include "libelfP.h"
+
+
+Elf_Scn *
+elf_getscn (Elf *elf, size_t idx)
+{
+ if (elf == NULL)
+ return NULL;
+
+ if (unlikely (elf->kind != ELF_K_ELF))
+ {
+ __libelf_seterrno (ELF_E_INVALID_HANDLE);
+ return NULL;
+ }
+
+ rwlock_rdlock (elf->lock);
+
+ Elf_Scn *result = NULL;
+
+ /* Find the section in the list. */
+ Elf_ScnList *runp = (elf->class == ELFCLASS32
+ || (offsetof (struct Elf, state.elf32.scns)
+ == offsetof (struct Elf, state.elf64.scns))
+ ? &elf->state.elf32.scns : &elf->state.elf64.scns);
+ while (1)
+ {
+ if (idx < runp->max)
+ {
+ if (idx < runp->cnt)
+ result = &runp->data[idx];
+ else
+ __libelf_seterrno (ELF_E_INVALID_INDEX);
+ break;
+ }
+
+ idx -= runp->max;
+
+ runp = runp->next;
+ if (runp == NULL)
+ {
+ __libelf_seterrno (ELF_E_INVALID_INDEX);
+ break;
+ }
+ }
+
+ rwlock_unlock (elf->lock);
+
+ return result;
+}
+INTDEF(elf_getscn)