diff options
Diffstat (limited to 'arch/x86/boot/compressed/kaslr.c')
| -rw-r--r-- | arch/x86/boot/compressed/kaslr.c | 29 |
1 files changed, 29 insertions, 0 deletions
diff --git a/arch/x86/boot/compressed/kaslr.c b/arch/x86/boot/compressed/kaslr.c index f15d7b8d1b16..81edf992277a 100644 --- a/arch/x86/boot/compressed/kaslr.c +++ b/arch/x86/boot/compressed/kaslr.c @@ -308,8 +308,37 @@ static bool mem_avoid_overlap(struct mem_vector *img) } static unsigned long slots[KERNEL_IMAGE_SIZE / CONFIG_PHYSICAL_ALIGN]; + +struct slot_area { + unsigned long addr; + int num; +}; + +#define MAX_SLOT_AREA 100 + +static struct slot_area slot_areas[MAX_SLOT_AREA]; + static unsigned long slot_max; +static unsigned long slot_area_index; + +static void store_slot_info(struct mem_vector *region, unsigned long image_size) +{ + struct slot_area slot_area; + + if (slot_area_index == MAX_SLOT_AREA) + return; + + slot_area.addr = region->start; + slot_area.num = (region->size - image_size) / + CONFIG_PHYSICAL_ALIGN + 1; + + if (slot_area.num > 0) { + slot_areas[slot_area_index++] = slot_area; + slot_max += slot_area.num; + } +} + static void slots_append(unsigned long addr) { /* Overflowing the slots list should be impossible. */ |