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* grub-core/kern/efi/mm.c: Limit allocations to 2GiB when not compiling

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with -mcmodel=large.
This commit is contained in:
Vladimir Serbinenko 2013-11-22 13:03:19 +01:00
parent 1a5b7b404f
commit 189090cee9
2 changed files with 17 additions and 6 deletions
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5
ChangeLog
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@ -1,3 +1,8 @@
2013-11-22 Vladimir Serbinenko <phcoder@gmail.com>
* grub-core/kern/efi/mm.c: Limit allocations to 2GiB when not compiling
with -mcmodel=large.
2013-11-22 Vladimir Serbinenko <phcoder@gmail.com>
* grub-core/kern/x86_64/dl.c (grub_arch_dl_relocate_symbols): Add

18
grub-core/kern/efi/mm.c
View file

@ -32,6 +32,12 @@
#define BYTES_TO_PAGES(bytes) (((bytes) + 0xfff) >> 12)
#define PAGES_TO_BYTES(pages) ((pages) << 12)
#if defined (__code_model_large__) || !defined (__x86_64__)
#define MAX_USABLE_ADDRESS 0xffffffff
#else
#define MAX_USABLE_ADDRESS 0x7fffffff
#endif
/* The size of a memory map obtained from the firmware. This must be
a multiplier of 4KB. */
#define MEMORY_MAP_SIZE 0x3000
@ -58,7 +64,7 @@ grub_efi_allocate_pages (grub_efi_physical_address_t address,
#if 1
/* Limit the memory access to less than 4GB for 32-bit platforms. */
if (address > 0xffffffff)
if (address > MAX_USABLE_ADDRESS)
return 0;
#endif
@ -66,7 +72,7 @@ grub_efi_allocate_pages (grub_efi_physical_address_t address,
if (address == 0)
{
type = GRUB_EFI_ALLOCATE_MAX_ADDRESS;
address = 0xffffffff;
address = MAX_USABLE_ADDRESS;
}
else
type = GRUB_EFI_ALLOCATE_ADDRESS;
@ -86,7 +92,7 @@ grub_efi_allocate_pages (grub_efi_physical_address_t address,
{
/* Uggh, the address 0 was allocated... This is too annoying,
so reallocate another one. */
address = 0xffffffff;
address = MAX_USABLE_ADDRESS;
status = efi_call_4 (b->allocate_pages, type, GRUB_EFI_LOADER_DATA, pages, &address);
grub_efi_free_pages (0, pages);
if (status != GRUB_EFI_SUCCESS)
@ -319,7 +325,7 @@ filter_memory_map (grub_efi_memory_descriptor_t *memory_map,
{
if (desc->type == GRUB_EFI_CONVENTIONAL_MEMORY
#if 1
&& desc->physical_start <= 0xffffffff
&& desc->physical_start <= MAX_USABLE_ADDRESS
#endif
&& desc->physical_start + PAGES_TO_BYTES (desc->num_pages) > 0x100000
&& desc->num_pages != 0)
@ -337,9 +343,9 @@ filter_memory_map (grub_efi_memory_descriptor_t *memory_map,
#if 1
if (BYTES_TO_PAGES (filtered_desc->physical_start)
+ filtered_desc->num_pages
> BYTES_TO_PAGES (0x100000000LL))
> BYTES_TO_PAGES (MAX_USABLE_ADDRESS+1LL))
filtered_desc->num_pages
= (BYTES_TO_PAGES (0x100000000LL)
= (BYTES_TO_PAGES (MAX_USABLE_ADDRESS+1LL)
- BYTES_TO_PAGES (filtered_desc->physical_start));
#endif