diff --git a/grub-core/efiemu/i386/loadcore64.c b/grub-core/efiemu/i386/loadcore64.c
index e49d0b6ff..18facf47f 100644
--- a/grub-core/efiemu/i386/loadcore64.c
+++ b/grub-core/efiemu/i386/loadcore64.c
@@ -98,6 +98,7 @@ grub_arch_efiemu_relocate_symbols64 (grub_efiemu_segment_t segs,
 		    break;
 
 		  case R_X86_64_PC32:
+		  case R_X86_64_PLT32:
 		    err = grub_efiemu_write_value (addr,
 						   *addr32 + rel->r_addend
 						   + sym.off
diff --git a/grub-core/fs/btrfs.c b/grub-core/fs/btrfs.c
index 4849c1ceb..be195448d 100644
--- a/grub-core/fs/btrfs.c
+++ b/grub-core/fs/btrfs.c
@@ -175,7 +175,7 @@ struct grub_btrfs_time
 {
   grub_int64_t sec;
   grub_uint32_t nanosec;
-} __attribute__ ((aligned (4)));
+} GRUB_PACKED;
 
 struct grub_btrfs_inode
 {
diff --git a/grub-core/kern/x86_64/dl.c b/grub-core/kern/x86_64/dl.c
index 440690673..3a73e6e6c 100644
--- a/grub-core/kern/x86_64/dl.c
+++ b/grub-core/kern/x86_64/dl.c
@@ -70,6 +70,7 @@ grub_arch_dl_relocate_symbols (grub_dl_t mod, void *ehdr,
 	  break;
 
 	case R_X86_64_PC32:
+	case R_X86_64_PLT32:
 	  {
 	    grub_int64_t value;
 	    value = ((grub_int32_t) *addr32) + rel->r_addend + sym->st_value -
diff --git a/grub-core/loader/i386/linux.c b/grub-core/loader/i386/linux.c
index 5fdfea312..0888c68b7 100644
--- a/grub-core/loader/i386/linux.c
+++ b/grub-core/loader/i386/linux.c
@@ -826,7 +826,7 @@ grub_cmd_linux (grub_command_t cmd __attribute__ ((unused)),
 
   len = sizeof (linux_params) - sizeof (lh);
 
-  grub_memcpy (&linux_params + sizeof (lh), kernel + kernel_offset, len);
+  grub_memcpy ((char *) &linux_params + sizeof (lh), kernel + kernel_offset, len);
   kernel_offset += len;
 
   linux_params.type_of_loader = GRUB_LINUX_BOOT_LOADER_TYPE;
diff --git a/include/grub/efiemu/runtime.h b/include/grub/efiemu/runtime.h
index 9b6b729f4..36d2dedf4 100644
--- a/include/grub/efiemu/runtime.h
+++ b/include/grub/efiemu/runtime.h
@@ -29,7 +29,7 @@ struct grub_efiemu_ptv_rel
 
 struct efi_variable
 {
-  grub_efi_guid_t guid;
+  grub_efi_packed_guid_t guid;
   grub_uint32_t namelen;
   grub_uint32_t size;
   grub_efi_uint32_t attributes;
diff --git a/include/grub/gpt_partition.h b/include/grub/gpt_partition.h
index 4730fe362..466735134 100644
--- a/include/grub/gpt_partition.h
+++ b/include/grub/gpt_partition.h
@@ -29,7 +29,7 @@ struct grub_gpt_guid
   grub_uint16_t data2;
   grub_uint16_t data3;
   grub_uint8_t data4[8];
-} __attribute__ ((aligned(8)));
+} GRUB_PACKED;
 typedef struct grub_gpt_guid grub_gpt_guid_t;
 typedef struct grub_gpt_guid grub_gpt_part_type_t;
 
diff --git a/util/grub-mkimagexx.c b/util/grub-mkimagexx.c
index e63f148e4..f20255a28 100644
--- a/util/grub-mkimagexx.c
+++ b/util/grub-mkimagexx.c
@@ -832,6 +832,7 @@ SUFFIX (relocate_addresses) (Elf_Ehdr *e, Elf_Shdr *sections,
 		  break;
 
 		case R_X86_64_PC32:
+		case R_X86_64_PLT32:
 		  {
 		    grub_uint32_t *t32 = (grub_uint32_t *) target;
 		    *t32 = grub_host_to_target64 (grub_target_to_host32 (*t32)
diff --git a/util/grub-module-verifier.c b/util/grub-module-verifier.c
index 9179285a5..a79271f66 100644
--- a/util/grub-module-verifier.c
+++ b/util/grub-module-verifier.c
@@ -19,6 +19,7 @@ struct grub_module_verifier_arch archs[] = {
       -1
     }, (int[]){
       R_X86_64_PC32,
+      R_X86_64_PLT32,
       -1
     }
   },