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one patch, on grub-2.04

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This commit is contained in:
Vincent Batts 2020-10-29 15:48:21 -04:00
parent 2a2e10c1b3
commit 1b24dcf433
61 changed files with 4887 additions and 97 deletions
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32
grub-core/kern/efi/mm.c
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@ -49,6 +49,38 @@ static grub_efi_uintn_t finish_desc_size;
static grub_efi_uint32_t finish_desc_version;
int grub_efi_is_finished = 0;
/* Allocate pages below a specified address */
void *
grub_efi_allocate_pages_max (grub_efi_physical_address_t max,
grub_efi_uintn_t pages)
{
grub_efi_status_t status;
grub_efi_boot_services_t *b;
grub_efi_physical_address_t address = max;
if (max > 0xffffffff)
return 0;
b = grub_efi_system_table->boot_services;
status = efi_call_4 (b->allocate_pages, GRUB_EFI_ALLOCATE_MAX_ADDRESS, GRUB_EFI_LOADER_DATA, pages, &address);
if (status != GRUB_EFI_SUCCESS)
return 0;
if (address == 0)
{
/* Uggh, the address 0 was allocated... This is too annoying,
so reallocate another one. */
address = max;
status = efi_call_4 (b->allocate_pages, GRUB_EFI_ALLOCATE_MAX_ADDRESS, GRUB_EFI_LOADER_DATA, pages, &address);
grub_efi_free_pages (0, pages);
if (status != GRUB_EFI_SUCCESS)
return 0;
}
return (void *) ((grub_addr_t) address);
}
/*
* We need to roll back EFI allocations on exit. Remember allocations that
* we'll free on exit.