Drop trailing NUL in .sbat/.sdmagic sections (#34950)

src/boot/efi/boot.c

@@ -1926,14 +1926,14 @@ static bool is_sd_boot(EFI_FILE *root_dir, const char16_t *loader_path) {
                         /* profile= */ UINT_MAX,
                         /* validate_base= */ 0,
                         &vector);
-        if (vector.memory_size != sizeof(SD_MAGIC))
+        if (vector.memory_size != STRLEN(SD_MAGIC))
                 return false;
 
         err = file_handle_read(handle, vector.file_offset, vector.file_size, &content, &read);
         if (err != EFI_SUCCESS || vector.file_size != read)
                 return false;
 
-        return memcmp(content, SD_MAGIC, sizeof(SD_MAGIC)) == 0;
+        return memcmp(content, SD_MAGIC, STRLEN(SD_MAGIC)) == 0;
 }
 
 static BootEntry* config_add_entry_loader_auto(

src/fundamental/macro-fundamental.h

@@ -542,7 +542,6 @@ static inline uint64_t ALIGN_OFFSET_U64(uint64_t l, uint64_t ali) {
 #define DECLARE_NOALLOC_SECTION(name, text)   \
         asm(".pushsection " name ",\"S\"\n\t" \
             ".ascii " STRINGIFY(text) "\n\t"  \
-            ".zero 1\n\t"                     \
             ".popsection\n")
 
 #ifdef SBAT_DISTRO

src/test/test-sbat.c

@@ -8,17 +8,26 @@
 #include "sbat.h"
 #include "tests.h"
 
-TEST(sbat_section_text) {
-        log_info("---SBAT-----------&<----------------------------------------\n"
+TEST(BOOT_SBAT) {
+        log_info("---SBAT-----------&<-----------------------------------------\n"
                  "%s"
+                 "------------------>&-----------------------------------------",
+#ifdef SBAT_DISTRO
+                 SBAT_BOOT_SECTION_TEXT
+#else
+                 "(not defined)"
+#endif
+        );
+}
+
+TEST(STUB_SBAT) {
+        log_info("---SBAT-----------&<-----------------------------------------\n"
                  "%s"
                  "------------------>&-----------------------------------------",
 #ifdef SBAT_DISTRO
-                 SBAT_BOOT_SECTION_TEXT,
                  SBAT_STUB_SECTION_TEXT
 #else
-                 "(not defined)",
-                 ""
+                 "(not defined)"
 #endif
         );
 }