Test (and fix) ImageAddress()

This adds a test case for our address sanitation checking function
ImageAddresS().  In doing so it addresses two issues:

- previously we allowed the address after the last byte of the image to
  be computed (may need to revert this or fix some callers, we'll see...)
- bespoke overflow checking and using + directly instead of using
  __builtin_add_overflow()

Signed-off-by: Peter Jones <pjones@redhat.com>

4 files changed, 1 insertions, 0 deletions

diff --git a/test-data/.gitignore b/test-data/.gitignore
new file mode 100644
index 00000000..bbde87b1
--- /dev/null
+++ b/test-data/.gitignore
@@ -0,0 +1 @@
+!/*.efi
diff --git a/test-data/grubx64.0.76.el7.1.efi b/test-data/grubx64.0.76.el7.1.efi
new file mode 100755
index 00000000..29f6812a
--- /dev/null
+++ b/test-data/grubx64.0.76.el7.1.efi
diff --git a/test-data/grubx64.0.76.el7.efi b/test-data/grubx64.0.76.el7.efi
new file mode 100755
index 00000000..5a198f6e
--- /dev/null
+++ b/test-data/grubx64.0.76.el7.efi
diff --git a/test-data/grubx64.0.80.el7.efi b/test-data/grubx64.0.80.el7.efi
new file mode 100755
index 00000000..c5f28d90
--- /dev/null
+++ b/test-data/grubx64.0.80.el7.efi