boot: move unified kernel PE section definitions into 'fundamental' code

Le's share this code between userspace and uefispace. This is useful
later when pre-measuring expected PCRs from userspace.

3 files changed, 30 insertions, 0 deletions

diff --git a/src/fundamental/meson.build b/src/fundamental/meson.build
index a4383f6a27..3810d6b456 100644
--- a/src/fundamental/meson.build
+++ b/src/fundamental/meson.build
@@ -17,6 +17,7 @@ fundamental_source_paths = files(
         'efivars-fundamental.c',
         'sha256.c',
         'string-util-fundamental.c',
+        'tpm-pcr.c',
 )
 
 # for libbasic
diff --git a/src/fundamental/tpm-pcr.c b/src/fundamental/tpm-pcr.c
new file mode 100644
index 0000000000..97b3c7b9d2
--- /dev/null
+++ b/src/fundamental/tpm-pcr.c
@@ -0,0 +1,15 @@
+/* SPDX-License-Identifier: LGPL-2.1-or-later */
+
+#include <stddef.h>
+
+#include "tpm-pcr.h"
+
+const char* const unified_sections[_UNIFIED_SECTION_MAX + 1] = {
+        [UNIFIED_SECTION_LINUX]   = ".linux",
+        [UNIFIED_SECTION_OSREL]   = ".osrel",
+        [UNIFIED_SECTION_CMDLINE] = ".cmdline",
+        [UNIFIED_SECTION_INITRD]  = ".initrd",
+        [UNIFIED_SECTION_SPLASH]  = ".splash",
+        [UNIFIED_SECTION_DTB]     = ".dtb",
+        NULL,
+};
diff --git a/src/fundamental/tpm-pcr.h b/src/fundamental/tpm-pcr.h
index 6e8b25934b..fb0774f70d 100644
--- a/src/fundamental/tpm-pcr.h
+++ b/src/fundamental/tpm-pcr.h
@@ -22,3 +22,17 @@
 
 /* This TPM PCR is where we extend the initrd sysext images into which we pass to the booted kernel */
 #define TPM_PCR_INDEX_INITRD_SYSEXTS 13U
+
+/* List of PE sections that have special meaning for us in unified kernels. This is the canonical order in
+ * which we measure the sections into TPM PCR 11 (see above). PLEASE DO NOT REORDER! */
+typedef enum UnifiedSection {
+        UNIFIED_SECTION_LINUX,
+        UNIFIED_SECTION_OSREL,
+        UNIFIED_SECTION_CMDLINE,
+        UNIFIED_SECTION_INITRD,
+        UNIFIED_SECTION_SPLASH,
+        UNIFIED_SECTION_DTB,
+        _UNIFIED_SECTION_MAX,
+} UnifiedSection;
+
+extern const char* const unified_sections[_UNIFIED_SECTION_MAX + 1];