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i386/relocator: Add grub_relocator64_efi relocator

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Add grub_relocator64_efi relocator. It will be used on EFI 64-bit platforms
when multiboot2 compatible image requests MULTIBOOT_TAG_TYPE_EFI_BS. Relocator
will set lower parts of %rax and %rbx accordingly to multiboot2 specification.
On the other hand processor mode, just before jumping into loaded image, will
be set accordingly to Unified Extensible Firmware Interface Specification,
Version 2.4 Errata B, section 2.3.4, x64 Platforms, boot services. This way
loaded image will be able to use EFI boot services without any issues.

Signed-off-by: Daniel Kiper <daniel.kiper@oracle.com>
Reviewed-by: Konrad Rzeszutek Wilk <konrad.wilk@oracle.com>
Reviewed-by: Vladimir Serbinenko <phcoder@gmail.com>
This commit is contained in:
Daniel Kiper 2015-07-17 19:43:42 +02:00
parent e563928ba4
commit 9862b24121
8 changed files with 186 additions and 9 deletions
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51
grub-core/loader/multiboot.c
View file

@ -118,6 +118,48 @@ grub_multiboot_set_video_mode (void)
return err;
}
#ifdef GRUB_MACHINE_EFI
#ifdef __x86_64__
#define grub_relocator_efi_boot grub_relocator64_efi_boot
#define grub_relocator_efi_state grub_relocator64_efi_state
#endif
#endif
#ifdef grub_relocator_efi_boot
static void
efi_boot (struct grub_relocator *rel,
grub_uint32_t target)
{
struct grub_relocator_efi_state state_efi = MULTIBOOT_EFI_INITIAL_STATE;
state_efi.MULTIBOOT_EFI_ENTRY_REGISTER = grub_multiboot_payload_eip;
state_efi.MULTIBOOT_EFI_MBI_REGISTER = target;
grub_relocator_efi_boot (rel, state_efi);
}
#else
#define grub_efi_is_finished 1
static void
efi_boot (struct grub_relocator *rel __attribute__ ((unused)),
grub_uint32_t target __attribute__ ((unused)))
{
}
#endif
#if defined (__i386__) || defined (__x86_64__)
static void
normal_boot (struct grub_relocator *rel, struct grub_relocator32_state state)
{
grub_relocator32_boot (rel, state, 0);
}
#else
static void
normal_boot (struct grub_relocator *rel, struct grub_relocator32_state state)
{
grub_relocator32_boot (rel, state);
}
#endif
static grub_err_t
grub_multiboot_boot (void)
{
@ -131,11 +173,10 @@ grub_multiboot_boot (void)
if (err)
return err;
#if defined (__i386__) || defined (__x86_64__)
grub_relocator32_boot (grub_multiboot_relocator, state, 0);
#else
grub_relocator32_boot (grub_multiboot_relocator, state);
#endif
if (grub_efi_is_finished)
normal_boot (grub_multiboot_relocator, state);
else
efi_boot (grub_multiboot_relocator, state.MULTIBOOT_MBI_REGISTER);
/* Not reached. */
return GRUB_ERR_NONE;