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author | Daniel Baumann <daniel.baumann@progress-linux.org> | 2024-04-07 16:29:51 +0000 |
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committer | Daniel Baumann <daniel.baumann@progress-linux.org> | 2024-04-07 16:29:51 +0000 |
commit | 6e7a315eb67cb6c113cf37e1d66c4f11a51a2b3e (patch) | |
tree | 32451fa3cdd9321fb2591fada9891b2cb70a9cd1 /include/grub/relocator.h | |
parent | Initial commit. (diff) | |
download | grub2-upstream/2.06.tar.xz grub2-upstream/2.06.zip |
Adding upstream version 2.06.upstream/2.06upstream
Signed-off-by: Daniel Baumann <daniel.baumann@progress-linux.org>
Diffstat (limited to '')
-rw-r--r-- | include/grub/relocator.h | 88 |
1 files changed, 88 insertions, 0 deletions
diff --git a/include/grub/relocator.h b/include/grub/relocator.h new file mode 100644 index 0000000..1b3bdd9 --- /dev/null +++ b/include/grub/relocator.h @@ -0,0 +1,88 @@ +/* + * GRUB -- GRand Unified Bootloader + * Copyright (C) 2009 Free Software Foundation, Inc. + * + * GRUB is free software: you can redistribute it and/or modify + * it under the terms of the GNU General Public License as published by + * the Free Software Foundation, either version 3 of the License, or + * (at your option) any later version. + * + * GRUB is distributed in the hope that it will be useful, + * but WITHOUT ANY WARRANTY; without even the implied warranty of + * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the + * GNU General Public License for more details. + * + * You should have received a copy of the GNU General Public License + * along with GRUB. If not, see <http://www.gnu.org/licenses/>. + */ + +#ifndef GRUB_RELOCATOR_HEADER +#define GRUB_RELOCATOR_HEADER 1 + +#include <grub/types.h> +#include <grub/err.h> +#include <grub/memory.h> +#include <grub/cpu/memory.h> + +struct grub_relocator; +struct grub_relocator_chunk; +typedef const struct grub_relocator_chunk *grub_relocator_chunk_t; + +struct grub_relocator *grub_relocator_new (void); + +grub_err_t +grub_relocator_alloc_chunk_addr (struct grub_relocator *rel, + grub_relocator_chunk_t *out, + grub_phys_addr_t target, grub_size_t size); + +void * +get_virtual_current_address (grub_relocator_chunk_t in); +grub_phys_addr_t +get_physical_target_address (grub_relocator_chunk_t in); + +grub_err_t +grub_relocator_alloc_chunk_align (struct grub_relocator *rel, + grub_relocator_chunk_t *out, + grub_phys_addr_t min_addr, + grub_phys_addr_t max_addr, + grub_size_t size, grub_size_t align, + int preference, + int avoid_efi_boot_services); + +/* + * Wrapper for grub_relocator_alloc_chunk_align() with purpose of + * protecting against integer underflow. + * + * Compare to its callee, max_addr has different meaning here. + * It covers entire chunk and not just start address of the chunk. + */ +static inline grub_err_t +grub_relocator_alloc_chunk_align_safe (struct grub_relocator *rel, + grub_relocator_chunk_t *out, + grub_phys_addr_t min_addr, + grub_phys_addr_t max_addr, + grub_size_t size, grub_size_t align, + int preference, + int avoid_efi_boot_services) +{ + /* Sanity check and ensure following equation (max_addr - size) is safe. */ + if (max_addr < size || (max_addr - size) < min_addr) + return GRUB_ERR_OUT_OF_RANGE; + + return grub_relocator_alloc_chunk_align (rel, out, min_addr, + max_addr - size, + size, align, preference, + avoid_efi_boot_services); +} + +/* Top 32-bit address minus s bytes and plus 1 byte. */ +#define UP_TO_TOP32(s) ((~(s) & 0xffffffff) + 1) + +#define GRUB_RELOCATOR_PREFERENCE_NONE 0 +#define GRUB_RELOCATOR_PREFERENCE_LOW 1 +#define GRUB_RELOCATOR_PREFERENCE_HIGH 2 + +void +grub_relocator_unload (struct grub_relocator *rel); + +#endif |