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  1.   ac03ec837917dadc35d7619bd759bc91f1f84222
  2.   0066-multiboot-disentangle-multiboot-and-multiboot2.patch
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From 21e4a6fa039bb7dc6be42e1e4c171ddc398b8431 Mon Sep 17 00:00:00 2001
From: Vladimir Serbinenko <phcoder@gmail.com>
Date: Mon, 14 Aug 2017 12:51:26 +0200
Subject: [PATCH] multiboot: disentangle multiboot and multiboot2.

Previously we had multiboot and multiboot2 declaring the same symbols.
This can potentially lead to aliasing and strange behaviours when e.g.
module instead of module2 is used with multiboot2.

Bug: #51137
---
 grub-core/loader/i386/multiboot_mbi.c |  4 +--
 grub-core/loader/multiboot.c          | 66 ++++++++++++++++++++--------------
 grub-core/loader/multiboot_elfxx.c    | 14 ++++----
 grub-core/loader/multiboot_mbi2.c     | 68 +++++++++++++++++------------------
 include/grub/i386/multiboot.h         |  9 ++++-
 include/grub/mips/multiboot.h         |  4 +--
 include/grub/multiboot.h              | 11 +-----
 include/multiboot2.h                  |  4 +--
 8 files changed, 95 insertions(+), 85 deletions(-)

diff --git a/grub-core/loader/i386/multiboot_mbi.c b/grub-core/loader/i386/multiboot_mbi.c
index fd7b41b0cad..dc98dbcae25 100644
--- a/grub-core/loader/i386/multiboot_mbi.c
+++ b/grub-core/loader/i386/multiboot_mbi.c
@@ -239,7 +239,7 @@ grub_multiboot_get_mbi_size (void)
   ret = sizeof (struct multiboot_info) + ALIGN_UP (cmdline_size, 4)
     + modcnt * sizeof (struct multiboot_mod_list) + total_modcmd
     + ALIGN_UP (sizeof(PACKAGE_STRING), 4) 
-    + grub_get_multiboot_mmap_count () * sizeof (struct multiboot_mmap_entry)
+    + grub_multiboot_get_mmap_count () * sizeof (struct multiboot_mmap_entry)
     + elf_sec_entsize * elf_sec_num
     + 256 * sizeof (struct multiboot_color)
 #if GRUB_MACHINE_HAS_VBE || GRUB_MACHINE_HAS_VGA_TEXT
@@ -542,7 +542,7 @@ grub_multiboot_make_mbi (grub_uint32_t *target)
       mbi->mods_count = 0;
     }
 
-  mmap_size = grub_get_multiboot_mmap_count () 
+  mmap_size = grub_multiboot_get_mmap_count () 
     * sizeof (struct multiboot_mmap_entry);
   grub_fill_multiboot_mmap ((struct multiboot_mmap_entry *) ptrorig);
   mbi->mmap_length = mmap_size;
diff --git a/grub-core/loader/multiboot.c b/grub-core/loader/multiboot.c
index bd9d5b3e698..bd3dc1990e3 100644
--- a/grub-core/loader/multiboot.c
+++ b/grub-core/loader/multiboot.c
@@ -28,7 +28,15 @@
 
 #include <grub/loader.h>
 #include <grub/command.h>
+#ifdef GRUB_USE_MULTIBOOT2
+#include <grub/multiboot2.h>
+#define GRUB_MULTIBOOT_CONSOLE_FRAMEBUFFER GRUB_MULTIBOOT2_CONSOLE_FRAMEBUFFER
+#define GRUB_MULTIBOOT_CONSOLE_EGA_TEXT GRUB_MULTIBOOT2_CONSOLE_EGA_TEXT
+#define GRUB_MULTIBOOT(x) grub_multiboot2_ ## x
+#else
 #include <grub/multiboot.h>
+#define GRUB_MULTIBOOT(x) grub_multiboot_ ## x
+#endif
 #include <grub/cpu/multiboot.h>
 #include <grub/elf.h>
 #include <grub/aout.h>
@@ -49,8 +57,8 @@ GRUB_MOD_LICENSE ("GPLv3+");
 #include <grub/efi/efi.h>
 #endif
 
-struct grub_relocator *grub_multiboot_relocator = NULL;
-grub_uint32_t grub_multiboot_payload_eip;
+struct grub_relocator *GRUB_MULTIBOOT (relocator) = NULL;
+grub_uint32_t GRUB_MULTIBOOT (payload_eip);
 #if defined (GRUB_MACHINE_PCBIOS) || defined (GRUB_MACHINE_MULTIBOOT) || defined (GRUB_MACHINE_COREBOOT) || defined (GRUB_MACHINE_QEMU)
 #define DEFAULT_VIDEO_MODE "text"
 #else
@@ -78,7 +86,7 @@ count_hook (grub_uint64_t addr __attribute__ ((unused)),
 /* Return the length of the Multiboot mmap that will be needed to allocate
    our platform's map.  */
 grub_uint32_t
-grub_get_multiboot_mmap_count (void)
+GRUB_MULTIBOOT (get_mmap_count) (void)
 {
   grub_size_t count = 0;
 
@@ -88,7 +96,7 @@ grub_get_multiboot_mmap_count (void)
 }
 
 grub_err_t
-grub_multiboot_set_video_mode (void)
+GRUB_MULTIBOOT (set_video_mode) (void)
 {
   grub_err_t err;
   const char *modevar;
@@ -164,19 +172,23 @@ static grub_err_t
 grub_multiboot_boot (void)
 {
   grub_err_t err;
+
+#ifdef GRUB_USE_MULTIBOOT2
+  struct grub_relocator32_state state = MULTIBOOT2_INITIAL_STATE;
+#else
   struct grub_relocator32_state state = MULTIBOOT_INITIAL_STATE;
+#endif
+  state.MULTIBOOT_ENTRY_REGISTER = GRUB_MULTIBOOT (payload_eip);
 
-  state.MULTIBOOT_ENTRY_REGISTER = grub_multiboot_payload_eip;
-
-  err = grub_multiboot_make_mbi (&state.MULTIBOOT_MBI_REGISTER);
+  err = GRUB_MULTIBOOT (make_mbi) (&state.MULTIBOOT_MBI_REGISTER);
 
   if (err)
     return err;
 
   if (grub_efi_is_finished)
-    normal_boot (grub_multiboot_relocator, state);
+    normal_boot (GRUB_MULTIBOOT (relocator), state);
   else
-    efi_boot (grub_multiboot_relocator, state.MULTIBOOT_MBI_REGISTER);
+    efi_boot (GRUB_MULTIBOOT (relocator), state.MULTIBOOT_MBI_REGISTER);
 
   /* Not reached.  */
   return GRUB_ERR_NONE;
@@ -185,10 +197,10 @@ grub_multiboot_boot (void)
 static grub_err_t
 grub_multiboot_unload (void)
 {
-  grub_multiboot_free_mbi ();
+  GRUB_MULTIBOOT (free_mbi) ();
 
-  grub_relocator_unload (grub_multiboot_relocator);
-  grub_multiboot_relocator = NULL;
+  grub_relocator_unload (GRUB_MULTIBOOT (relocator));
+  GRUB_MULTIBOOT (relocator) = NULL;
 
   grub_dl_unref (my_mod);
 
@@ -207,7 +219,7 @@ static grub_uint64_t highest_load;
 
 /* Load ELF32 or ELF64.  */
 grub_err_t
-grub_multiboot_load_elf (mbi_load_data_t *mld)
+GRUB_MULTIBOOT (load_elf) (mbi_load_data_t *mld)
 {
   if (grub_multiboot_is_elf32 (mld->buffer))
     return grub_multiboot_load_elf32 (mld);
@@ -218,9 +230,9 @@ grub_multiboot_load_elf (mbi_load_data_t *mld)
 }
 
 grub_err_t
-grub_multiboot_set_console (int console_type, int accepted_consoles,
-			    int width, int height, int depth,
-			    int console_req)
+GRUB_MULTIBOOT (set_console) (int console_type, int accepted_consoles,
+			      int width, int height, int depth,
+			      int console_req)
 {
   console_required = console_req;
   if (!(accepted_consoles 
@@ -313,19 +325,19 @@ grub_cmd_multiboot (grub_command_t cmd __attribute__ ((unused)),
   grub_dl_ref (my_mod);
 
   /* Skip filename.  */
-  grub_multiboot_init_mbi (argc - 1, argv + 1);
+  GRUB_MULTIBOOT (init_mbi) (argc - 1, argv + 1);
 
-  grub_relocator_unload (grub_multiboot_relocator);
-  grub_multiboot_relocator = grub_relocator_new ();
+  grub_relocator_unload (GRUB_MULTIBOOT (relocator));
+  GRUB_MULTIBOOT (relocator) = grub_relocator_new ();
 
-  if (!grub_multiboot_relocator)
+  if (!GRUB_MULTIBOOT (relocator))
     goto fail;
 
-  err = grub_multiboot_load (file, argv[0]);
+  err = GRUB_MULTIBOOT (load) (file, argv[0]);
   if (err)
     goto fail;
 
-  grub_multiboot_set_bootdev ();
+  GRUB_MULTIBOOT (set_bootdev) ();
 
   grub_loader_set (grub_multiboot_boot, grub_multiboot_unload, 0);
 
@@ -335,8 +347,8 @@ grub_cmd_multiboot (grub_command_t cmd __attribute__ ((unused)),
 
   if (grub_errno != GRUB_ERR_NONE)
     {
-      grub_relocator_unload (grub_multiboot_relocator);
-      grub_multiboot_relocator = NULL;
+      grub_relocator_unload (GRUB_MULTIBOOT (relocator));
+      GRUB_MULTIBOOT (relocator) = NULL;
       grub_dl_unref (my_mod);
     }
 
@@ -368,7 +380,7 @@ grub_cmd_module (grub_command_t cmd __attribute__ ((unused)),
   if (argc == 0)
     return grub_error (GRUB_ERR_BAD_ARGUMENT, N_("filename expected"));
 
-  if (!grub_multiboot_relocator)
+  if (!GRUB_MULTIBOOT (relocator))
     return grub_error (GRUB_ERR_BAD_ARGUMENT,
 		       N_("you need to load the kernel first"));
 
@@ -389,7 +401,7 @@ grub_cmd_module (grub_command_t cmd __attribute__ ((unused)),
   if (size)
   {
     grub_relocator_chunk_t ch;
-    err = grub_relocator_alloc_chunk_align (grub_multiboot_relocator, &ch,
+    err = grub_relocator_alloc_chunk_align (GRUB_MULTIBOOT (relocator), &ch,
 					    lowest_addr, (0xffffffff - size) + 1,
 					    size, MULTIBOOT_MOD_ALIGN,
 					    GRUB_RELOCATOR_PREFERENCE_NONE, 1);
@@ -407,7 +419,7 @@ grub_cmd_module (grub_command_t cmd __attribute__ ((unused)),
       target = 0;
     }
 
-  err = grub_multiboot_add_module (target, size, argc - 1, argv + 1);
+  err = GRUB_MULTIBOOT (add_module) (target, size, argc - 1, argv + 1);
   if (err)
     {
       grub_file_close (file);
diff --git a/grub-core/loader/multiboot_elfxx.c b/grub-core/loader/multiboot_elfxx.c
index 5e649ed2545..67daf5944b0 100644
--- a/grub-core/loader/multiboot_elfxx.c
+++ b/grub-core/loader/multiboot_elfxx.c
@@ -104,13 +104,13 @@ CONCAT(grub_multiboot_load_elf, XX) (mbi_load_data_t *mld)
       if (load_size > mld->max_addr || mld->min_addr > mld->max_addr - load_size)
 	return grub_error (GRUB_ERR_BAD_OS, "invalid min/max address and/or load size");
 
-      err = grub_relocator_alloc_chunk_align (grub_multiboot_relocator, &ch,
+      err = grub_relocator_alloc_chunk_align (GRUB_MULTIBOOT (relocator), &ch,
 					      mld->min_addr, mld->max_addr - load_size,
 					      load_size, mld->align ? mld->align : 1,
 					      mld->preference, mld->avoid_efi_boot_services);
     }
   else
-    err = grub_relocator_alloc_chunk_addr (grub_multiboot_relocator, &ch,
+    err = grub_relocator_alloc_chunk_addr (GRUB_MULTIBOOT (relocator), &ch,
 					   mld->link_base_addr, load_size);
 
   if (err)
@@ -167,7 +167,7 @@ CONCAT(grub_multiboot_load_elf, XX) (mbi_load_data_t *mld)
     if (phdr(i)->p_vaddr <= ehdr->e_entry
 	&& phdr(i)->p_vaddr + phdr(i)->p_memsz > ehdr->e_entry)
       {
-	grub_multiboot_payload_eip = (ehdr->e_entry - phdr(i)->p_vaddr)
+	GRUB_MULTIBOOT (payload_eip) = (ehdr->e_entry - phdr(i)->p_vaddr)
 	  + phdr(i)->p_paddr;
 #ifdef MULTIBOOT_LOAD_ELF64
 # ifdef __mips
@@ -191,7 +191,7 @@ CONCAT(grub_multiboot_load_elf, XX) (mbi_load_data_t *mld)
 #if defined (__i386__) || defined (__x86_64__)
   
 #elif defined (__mips)
-  grub_multiboot_payload_eip |= 0x80000000;
+  GRUB_MULTIBOOT (payload_eip) |= 0x80000000;
 #else
 #error Please complete this
 #endif
@@ -238,7 +238,7 @@ CONCAT(grub_multiboot_load_elf, XX) (mbi_load_data_t *mld)
 	  if (sh->sh_size == 0)
 	    continue;
 
-	  err = grub_relocator_alloc_chunk_align (grub_multiboot_relocator, &ch, 0,
+	  err = grub_relocator_alloc_chunk_align (GRUB_MULTIBOOT (relocator), &ch, 0,
 						  (0xffffffff - sh->sh_size) + 1,
 						  sh->sh_size, sh->sh_addralign,
 						  GRUB_RELOCATOR_PREFERENCE_NONE,
@@ -264,8 +264,8 @@ CONCAT(grub_multiboot_load_elf, XX) (mbi_load_data_t *mld)
 	    }
 	  sh->sh_addr = target;
 	}
-      grub_multiboot_add_elfsyms (ehdr->e_shnum, ehdr->e_shentsize,
-				  ehdr->e_shstrndx, shdr);
+      GRUB_MULTIBOOT (add_elfsyms) (ehdr->e_shnum, ehdr->e_shentsize,
+				    ehdr->e_shstrndx, shdr);
     }
 
 #undef phdr
diff --git a/grub-core/loader/multiboot_mbi2.c b/grub-core/loader/multiboot_mbi2.c
index b0679a9f6c9..4df6595954d 100644
--- a/grub-core/loader/multiboot_mbi2.c
+++ b/grub-core/loader/multiboot_mbi2.c
@@ -22,7 +22,7 @@
 #include <grub/machine/apm.h>
 #include <grub/machine/memory.h>
 #endif
-#include <grub/multiboot.h>
+#include <grub/multiboot2.h>
 #include <grub/cpu/multiboot.h>
 #include <grub/cpu/relocator.h>
 #include <grub/disk.h>
@@ -71,7 +71,7 @@ static int keep_bs = 0;
 static grub_uint32_t load_base_addr;
 
 void
-grub_multiboot_add_elfsyms (grub_size_t num, grub_size_t entsize,
+grub_multiboot2_add_elfsyms (grub_size_t num, grub_size_t entsize,
 			    unsigned shndx, void *data)
 {
   elf_sec_num = num;
@@ -90,17 +90,17 @@ find_header (grub_properly_aligned_t *buffer, grub_ssize_t len)
        ((char *) header <= (char *) buffer + len - 12);
        header = (struct multiboot_header *) ((grub_uint32_t *) header + MULTIBOOT_HEADER_ALIGN / 4))
     {
-      if (header->magic == MULTIBOOT_HEADER_MAGIC
+      if (header->magic == MULTIBOOT2_HEADER_MAGIC
 	  && !(header->magic + header->architecture
 	       + header->header_length + header->checksum)
-	  && header->architecture == MULTIBOOT_ARCHITECTURE_CURRENT)
+	  && header->architecture == MULTIBOOT2_ARCHITECTURE_CURRENT)
 	return header;
     }
   return NULL;
 }
 
 grub_err_t
-grub_multiboot_load (grub_file_t file, const char *filename)
+grub_multiboot2_load (grub_file_t file, const char *filename)
 {
   grub_ssize_t len;
   struct multiboot_header *header;
@@ -112,7 +112,7 @@ grub_multiboot_load (grub_file_t file, const char *filename)
   grub_addr_t entry = 0, efi_entry = 0;
   grub_uint32_t console_required = 0;
   struct multiboot_header_tag_framebuffer *fbtag = NULL;
-  int accepted_consoles = GRUB_MULTIBOOT_CONSOLE_EGA_TEXT;
+  int accepted_consoles = GRUB_MULTIBOOT2_CONSOLE_EGA_TEXT;
   mbi_load_data_t mld;
 
   mld.mbi_ver = 2;
@@ -210,7 +210,7 @@ grub_multiboot_load (grub_file_t file, const char *filename)
       case MULTIBOOT_HEADER_TAG_CONSOLE_FLAGS:
 	if (!(((struct multiboot_header_tag_console_flags *) tag)->console_flags
 	    & MULTIBOOT_CONSOLE_FLAGS_EGA_TEXT_SUPPORTED))
-	  accepted_consoles &= ~GRUB_MULTIBOOT_CONSOLE_EGA_TEXT;
+	  accepted_consoles &= ~GRUB_MULTIBOOT2_CONSOLE_EGA_TEXT;
 	if (((struct multiboot_header_tag_console_flags *) tag)->console_flags
 	    & MULTIBOOT_CONSOLE_FLAGS_CONSOLE_REQUIRED)
 	  console_required = 1;
@@ -218,7 +218,7 @@ grub_multiboot_load (grub_file_t file, const char *filename)
 
       case MULTIBOOT_HEADER_TAG_FRAMEBUFFER:
 	fbtag = (struct multiboot_header_tag_framebuffer *) tag;
-	accepted_consoles |= GRUB_MULTIBOOT_CONSOLE_FRAMEBUFFER;
+	accepted_consoles |= GRUB_MULTIBOOT2_CONSOLE_FRAMEBUFFER;
 	break;
 
       case MULTIBOOT_HEADER_TAG_RELOCATABLE:
@@ -295,13 +295,13 @@ grub_multiboot_load (grub_file_t file, const char *filename)
 	      return grub_error (GRUB_ERR_BAD_OS, "invalid min/max address and/or load size");
 	    }
 
-	  err = grub_relocator_alloc_chunk_align (grub_multiboot_relocator, &ch,
+	  err = grub_relocator_alloc_chunk_align (grub_multiboot2_relocator, &ch,
 						  mld.min_addr, mld.max_addr - code_size,
 						  code_size, mld.align ? mld.align : 1,
 						  mld.preference, keep_bs);
 	}
       else
-	err = grub_relocator_alloc_chunk_addr (grub_multiboot_relocator,
+	err = grub_relocator_alloc_chunk_addr (grub_multiboot2_relocator,
 					       &ch, load_addr, code_size);
       if (err)
 	{
@@ -343,7 +343,7 @@ grub_multiboot_load (grub_file_t file, const char *filename)
       mld.file = file;
       mld.filename = filename;
       mld.avoid_efi_boot_services = keep_bs;
-      err = grub_multiboot_load_elf (&mld);
+      err = grub_multiboot2_load_elf (&mld);
       if (err)
 	{
 	  grub_free (mld.buffer);
@@ -354,9 +354,9 @@ grub_multiboot_load (grub_file_t file, const char *filename)
   load_base_addr = mld.load_base_addr;
 
   if (keep_bs && efi_entry_specified)
-    grub_multiboot_payload_eip = efi_entry;
+    grub_multiboot2_payload_eip = efi_entry;
   else if (entry_specified)
-    grub_multiboot_payload_eip = entry;
+    grub_multiboot2_payload_eip = entry;
 
   if (mld.relocatable)
     {
@@ -370,20 +370,20 @@ grub_multiboot_load (grub_file_t file, const char *filename)
        * 64-bit int here.
        */
       if (mld.load_base_addr >= mld.link_base_addr)
-	grub_multiboot_payload_eip += mld.load_base_addr - mld.link_base_addr;
+	grub_multiboot2_payload_eip += mld.load_base_addr - mld.link_base_addr;
       else
-	grub_multiboot_payload_eip -= mld.link_base_addr - mld.load_base_addr;
+	grub_multiboot2_payload_eip -= mld.link_base_addr - mld.load_base_addr;
     }
 
   if (fbtag)
-    err = grub_multiboot_set_console (GRUB_MULTIBOOT_CONSOLE_FRAMEBUFFER,
-				      accepted_consoles,
-				      fbtag->width, fbtag->height,
-				      fbtag->depth, console_required);
+    err = grub_multiboot2_set_console (GRUB_MULTIBOOT2_CONSOLE_FRAMEBUFFER,
+				       accepted_consoles,
+				       fbtag->width, fbtag->height,
+				       fbtag->depth, console_required);
   else
-    err = grub_multiboot_set_console (GRUB_MULTIBOOT_CONSOLE_EGA_TEXT,
-				      accepted_consoles,
-				      0, 0, 0, console_required);
+    err = grub_multiboot2_set_console (GRUB_MULTIBOOT2_CONSOLE_EGA_TEXT,
+				       accepted_consoles,
+				       0, 0, 0, console_required);
   return err;
 }
 
@@ -459,7 +459,7 @@ net_size (void)
 }
 
 static grub_size_t
-grub_multiboot_get_mbi_size (void)
+grub_multiboot2_get_mbi_size (void)
 {
 #ifdef GRUB_MACHINE_EFI
   if (!keep_bs && !efi_mmap_size)
@@ -478,7 +478,7 @@ grub_multiboot_get_mbi_size (void)
     + ALIGN_UP (sizeof (struct multiboot_tag_elf_sections), MULTIBOOT_TAG_ALIGN)
     + ALIGN_UP (elf_sec_entsize * elf_sec_num, MULTIBOOT_TAG_ALIGN)
     + ALIGN_UP ((sizeof (struct multiboot_tag_mmap)
-		 + grub_get_multiboot_mmap_count ()
+		 + grub_multiboot2_get_mmap_count ()
 		 * sizeof (struct multiboot_mmap_entry)), MULTIBOOT_TAG_ALIGN)
     + ALIGN_UP (sizeof (struct multiboot_tag_framebuffer), MULTIBOOT_TAG_ALIGN)
     + ALIGN_UP (sizeof (struct multiboot_tag_old_acpi)
@@ -522,7 +522,7 @@ grub_fill_multiboot_mmap (struct multiboot_tag_mmap *tag)
 
   tag->type = MULTIBOOT_TAG_TYPE_MMAP;
   tag->size = sizeof (struct multiboot_tag_mmap)
-    + sizeof (struct multiboot_mmap_entry) * grub_get_multiboot_mmap_count (); 
+    + sizeof (struct multiboot_mmap_entry) * grub_multiboot2_get_mmap_count (); 
   tag->entry_size = sizeof (struct multiboot_mmap_entry);
   tag->entry_version = 0;
 
@@ -588,7 +588,7 @@ retrieve_video_parameters (grub_properly_aligned_t **ptrorig)
   struct multiboot_tag_framebuffer *tag
     = (struct multiboot_tag_framebuffer *) *ptrorig;
 
-  err = grub_multiboot_set_video_mode ();
+  err = grub_multiboot2_set_video_mode ();
   if (err)
     {
       grub_print_error ();
@@ -731,7 +731,7 @@ retrieve_video_parameters (grub_properly_aligned_t **ptrorig)
 }
 
 grub_err_t
-grub_multiboot_make_mbi (grub_uint32_t *target)
+grub_multiboot2_make_mbi (grub_uint32_t *target)
 {
   grub_properly_aligned_t *ptrorig;
   grub_properly_aligned_t *mbistart;
@@ -739,11 +739,11 @@ grub_multiboot_make_mbi (grub_uint32_t *target)
   grub_size_t bufsize;
   grub_relocator_chunk_t ch;
 
-  bufsize = grub_multiboot_get_mbi_size ();
+  bufsize = grub_multiboot2_get_mbi_size ();
 
   COMPILE_TIME_ASSERT (MULTIBOOT_TAG_ALIGN % sizeof (grub_properly_aligned_t) == 0);
 
-  err = grub_relocator_alloc_chunk_align (grub_multiboot_relocator, &ch,
+  err = grub_relocator_alloc_chunk_align (grub_multiboot2_relocator, &ch,
 					  0, 0xffffffff - bufsize,
 					  bufsize, MULTIBOOT_TAG_ALIGN,
 					  GRUB_RELOCATOR_PREFERENCE_NONE, 1);
@@ -1039,7 +1039,7 @@ grub_multiboot_make_mbi (grub_uint32_t *target)
 }
 
 void
-grub_multiboot_free_mbi (void)
+grub_multiboot2_free_mbi (void)
 {
   struct module *cur, *next;
 
@@ -1061,11 +1061,11 @@ grub_multiboot_free_mbi (void)
 }
 
 grub_err_t
-grub_multiboot_init_mbi (int argc, char *argv[])
+grub_multiboot2_init_mbi (int argc, char *argv[])
 {
   grub_ssize_t len = 0;
 
-  grub_multiboot_free_mbi ();
+  grub_multiboot2_free_mbi ();
 
   len = grub_loader_cmdline_size (argc, argv);
 
@@ -1081,7 +1081,7 @@ grub_multiboot_init_mbi (int argc, char *argv[])
 }
 
 grub_err_t
-grub_multiboot_add_module (grub_addr_t start, grub_size_t size,
+grub_multiboot2_add_module (grub_addr_t start, grub_size_t size,
 			   int argc, char *argv[])
 {
   struct module *newmod;
@@ -1119,7 +1119,7 @@ grub_multiboot_add_module (grub_addr_t start, grub_size_t size,
 }
 
 void
-grub_multiboot_set_bootdev (void)
+grub_multiboot2_set_bootdev (void)
 {
   grub_device_t dev;
 
diff --git a/include/grub/i386/multiboot.h b/include/grub/i386/multiboot.h
index 807a1de27f9..9cd97dfced8 100644
--- a/include/grub/i386/multiboot.h
+++ b/include/grub/i386/multiboot.h
@@ -19,6 +19,13 @@
 #ifndef GRUB_MULTIBOOT_CPU_HEADER
 #define GRUB_MULTIBOOT_CPU_HEADER	1
 
+#define MULTIBOOT2_INITIAL_STATE  { .eax = MULTIBOOT2_BOOTLOADER_MAGIC,	\
+    .ecx = 0,								\
+    .edx = 0,								\
+    /* Set esp to some random location in low memory to avoid breaking */ \
+    /* non-compliant kernels.  */					\
+    .esp = 0x7ff00							\
+      }
 #define MULTIBOOT_INITIAL_STATE  { .eax = MULTIBOOT_BOOTLOADER_MAGIC,	\
     .ecx = 0,								\
     .edx = 0,								\
@@ -28,7 +35,7 @@
       }
 #define MULTIBOOT_ENTRY_REGISTER eip
 #define MULTIBOOT_MBI_REGISTER ebx
-#define MULTIBOOT_ARCHITECTURE_CURRENT MULTIBOOT_ARCHITECTURE_I386
+#define MULTIBOOT2_ARCHITECTURE_CURRENT MULTIBOOT2_ARCHITECTURE_I386
 
 #ifdef GRUB_MACHINE_EFI
 #ifdef __x86_64__
diff --git a/include/grub/mips/multiboot.h b/include/grub/mips/multiboot.h
index 4aebf29e732..c4eee2dd01b 100644
--- a/include/grub/mips/multiboot.h
+++ b/include/grub/mips/multiboot.h
@@ -19,11 +19,11 @@
 #ifndef GRUB_MULTIBOOT_CPU_HEADER
 #define GRUB_MULTIBOOT_CPU_HEADER	1
 
-#define MULTIBOOT_INITIAL_STATE  { .gpr[4] = MULTIBOOT_BOOTLOADER_MAGIC, \
+#define MULTIBOOT2_INITIAL_STATE  { .gpr[4] = MULTIBOOT2_BOOTLOADER_MAGIC, \
     .jumpreg = 1 }
 #define MULTIBOOT_ENTRY_REGISTER gpr[1]
 #define MULTIBOOT_MBI_REGISTER gpr[5]
-#define MULTIBOOT_ARCHITECTURE_CURRENT MULTIBOOT_ARCHITECTURE_MIPS32
+#define MULTIBOOT2_ARCHITECTURE_CURRENT MULTIBOOT_ARCHITECTURE_MIPS32
 
 #define MULTIBOOT_ELF32_MACHINE EM_MIPS
 #define MULTIBOOT_ELF64_MACHINE EM_MIPS
diff --git a/include/grub/multiboot.h b/include/grub/multiboot.h
index c96492bb5fa..bd0a9873e6c 100644
--- a/include/grub/multiboot.h
+++ b/include/grub/multiboot.h
@@ -22,19 +22,11 @@
 
 #include <grub/file.h>
 
-#ifdef GRUB_USE_MULTIBOOT2
-#include <multiboot2.h>
-/* Same thing as far as our loader is concerned.  */
-#define MULTIBOOT_BOOTLOADER_MAGIC	MULTIBOOT2_BOOTLOADER_MAGIC
-#define MULTIBOOT_HEADER_MAGIC		MULTIBOOT2_HEADER_MAGIC
-#else
 #include <multiboot.h>
-#endif
 
 #include <grub/types.h>
 #include <grub/err.h>
 
-#ifndef GRUB_USE_MULTIBOOT2
 typedef enum
   {
     GRUB_MULTIBOOT_QUIRKS_NONE = 0,
@@ -42,7 +34,6 @@ typedef enum
     GRUB_MULTIBOOT_QUIRK_MODULES_AFTER_KERNEL = 2
   } grub_multiboot_quirks_t;
 extern grub_multiboot_quirks_t grub_multiboot_quirks;
-#endif
 
 extern struct grub_relocator *grub_multiboot_relocator;
 
@@ -60,7 +51,7 @@ void
 grub_multiboot_add_elfsyms (grub_size_t num, grub_size_t entsize,
 			    unsigned shndx, void *data);
 
-grub_uint32_t grub_get_multiboot_mmap_count (void);
+grub_uint32_t grub_multiboot_get_mmap_count (void);
 grub_err_t grub_multiboot_set_video_mode (void);
 
 /* FIXME: support coreboot as well.  */
diff --git a/include/multiboot2.h b/include/multiboot2.h
index 5a3db5a7cae..5693923c014 100644
--- a/include/multiboot2.h
+++ b/include/multiboot2.h
@@ -75,8 +75,8 @@
 #define MULTIBOOT_HEADER_TAG_ENTRY_ADDRESS_EFI64  9
 #define MULTIBOOT_HEADER_TAG_RELOCATABLE  10
 
-#define MULTIBOOT_ARCHITECTURE_I386  0
-#define MULTIBOOT_ARCHITECTURE_MIPS32  4
+#define MULTIBOOT2_ARCHITECTURE_I386  0
+#define MULTIBOOT2_ARCHITECTURE_MIPS32  4
 #define MULTIBOOT_HEADER_TAG_OPTIONAL 1
 
 #define MULTIBOOT_LOAD_PREFERENCE_NONE 0
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