util: Add utility build-id code.

Provides the ability to read the .note.gnu.build-id section of ELF
binaries, which is inserted by the --build-id=... flag to ld.

Reviewed-by: Emil Velikov <[email protected]>
Reviewed-by: Chad Versace <[email protected]>

1 files changed, 38 insertions, 0 deletions

diff --git a/src/util/build_id.h b/src/util/build_id.h
new file mode 100644
index 00000000000..39bf9b016fd
--- /dev/null
+++ b/src/util/build_id.h
@@ -0,0 +1,38 @@
+/*
+ * Copyright © 2016 Intel Corporation
+ *
+ * Permission is hereby granted, free of charge, to any person obtaining a
+ * copy of this software and associated documentation files (the "Software"),
+ * to deal in the Software without restriction, including without limitation
+ * the rights to use, copy, modify, merge, publish, distribute, sublicense,
+ * and/or sell copies of the Software, and to permit persons to whom the
+ * Software is furnished to do so, subject to the following conditions:
+ *
+ * The above copyright notice and this permission notice (including the next
+ * paragraph) shall be included in all copies or substantial portions of the
+ * Software.
+ *
+ * THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR
+ * IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
+ * FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT.  IN NO EVENT SHALL
+ * THE AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER
+ * LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING
+ * FROM, OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS
+ * IN THE SOFTWARE.
+ */
+
+#ifdef HAVE_DL_ITERATE_PHDR
+
+struct build_id_note;
+
+const struct build_id_note *
+build_id_find_nhdr(const char *filename);
+
+unsigned
+build_id_length(const struct build_id_note *note);
+
+void
+build_id_read(const struct build_id_note *note,
+              unsigned char *build_id, size_t n);
+
+#endif