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boot services avoid code based on the patch by Matthew Garrett

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This commit is contained in:
Vladimir 'phcoder' Serbinenko 2012-03-03 20:06:41 +01:00
parent 86e5ab4b81
commit 9be4c45dbe
18 changed files with 136 additions and 37 deletions
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77
grub-core/loader/i386/linux.c
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@ -189,7 +189,9 @@ free_pages (void)
/* Allocate pages for the real mode code and the protected mode code
for linux as well as a memory map buffer. */
static grub_err_t
allocate_pages (grub_size_t prot_size)
allocate_pages (grub_size_t prot_size, grub_size_t *align,
grub_size_t min_align, int relocatable,
grub_uint64_t prefered_address)
{
grub_size_t real_size, mmap_size;
grub_err_t err;
@ -254,7 +256,11 @@ allocate_pages (grub_size_t prot_size)
return 0;
}
#ifdef GRUB_MACHINE_EFI
grub_efi_mmap_iterate (hook, 1);
#else
grub_mmap_iterate (hook);
#endif
if (! real_mode_target)
{
err = grub_error (GRUB_ERR_OUT_OF_MEMORY, "cannot allocate real mode pages");
@ -273,15 +279,36 @@ allocate_pages (grub_size_t prot_size)
}
efi_mmap_buf = (grub_uint8_t *) real_mode_mem + real_size + mmap_size;
prot_mode_target = GRUB_LINUX_BZIMAGE_ADDR;
{
grub_relocator_chunk_t ch;
err = grub_relocator_alloc_chunk_addr (relocator, &ch,
prot_mode_target, prot_size);
if (relocatable)
{
err = grub_relocator_alloc_chunk_align (relocator, &ch,
prefered_address,
prefered_address,
prot_size, 1,
GRUB_RELOCATOR_PREFERENCE_LOW,
1);
for (; err && *align >= min_align; (*align)--)
{
grub_errno = GRUB_ERR_NONE;
err = grub_relocator_alloc_chunk_align (relocator, &ch,
0x1000000, 0xffffffff,
prot_size, 1 << *align,
GRUB_RELOCATOR_PREFERENCE_LOW,
1);
}
if (err)
goto fail;
}
else
err = grub_relocator_alloc_chunk_addr (relocator, &ch,
prefered_address,
prot_size);
if (err)
goto fail;
prot_mode_mem = get_virtual_current_address (ch);
prot_mode_target = get_physical_target_address (ch);
}
grub_dprintf ("linux", "real_mode_mem = %lx, real_mode_pages = %x, "
@ -612,7 +639,7 @@ grub_linux_boot (void)
state.esi = real_mode_target;
state.esp = real_mode_target;
state.eip = params->code32_start;
return grub_relocator32_boot (relocator, state);
return grub_relocator32_boot (relocator, state, 0);
}
static grub_err_t
@ -634,6 +661,9 @@ grub_cmd_linux (grub_command_t cmd __attribute__ ((unused)),
grub_size_t real_size, prot_size;
grub_ssize_t len;
int i;
grub_size_t align, min_align;
int relocatable;
grub_uint64_t preffered_address = GRUB_LINUX_BZIMAGE_ADDR;
grub_dl_ref (my_mod);
@ -707,7 +737,37 @@ grub_cmd_linux (grub_command_t cmd __attribute__ ((unused)),
real_size = setup_sects << GRUB_DISK_SECTOR_BITS;
prot_size = grub_file_size (file) - real_size - GRUB_DISK_SECTOR_SIZE;
if (allocate_pages (prot_size))
if (grub_le_to_cpu16 (lh.version) >= 0x205
&& lh.kernel_alignment != 0
&& ((lh.kernel_alignment - 1) & lh.kernel_alignment) == 0)
{
for (align = 0; align < 32; align++)
if (grub_le_to_cpu32 (lh.kernel_alignment) & (1 << align))
break;
relocatable = grub_le_to_cpu32 (lh.relocatable);
}
else
{
align = 0;
relocatable = 0;
}
if (grub_le_to_cpu16 (lh.version) >= 0x020a)
{
min_align = lh.min_alignment;
prot_size = grub_le_to_cpu32 (lh.init_size);
preffered_address = grub_le_to_cpu64 (lh.pref_address);
}
else
{
min_align = 0;
prot_size = grub_file_size (file) - real_size - GRUB_DISK_SECTOR_SIZE;
preffered_address = grub_le_to_cpu32 (lh.code32_start);
}
if (allocate_pages (prot_size, &align,
min_align, relocatable,
preffered_address))
goto fail;
params = (struct linux_kernel_params *) real_mode_mem;
@ -1021,7 +1081,8 @@ grub_cmd_initrd (grub_command_t cmd __attribute__ ((unused)),
grub_relocator_chunk_t ch;
err = grub_relocator_alloc_chunk_align (relocator, &ch,
addr_min, addr, size, 0x1000,
GRUB_RELOCATOR_PREFERENCE_HIGH);
GRUB_RELOCATOR_PREFERENCE_HIGH,
1);
if (err)
return err;
initrd_mem = get_virtual_current_address (ch);