diff options
author | André Fabian Silva Delgado <emulatorman@parabola.nu> | 2016-09-11 04:34:46 -0300 |
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committer | André Fabian Silva Delgado <emulatorman@parabola.nu> | 2016-09-11 04:34:46 -0300 |
commit | 863981e96738983919de841ec669e157e6bdaeb0 (patch) | |
tree | d6d89a12e7eb8017837c057935a2271290907f76 /drivers/firmware/efi/libstub/arm64-stub.c | |
parent | 8dec7c70575785729a6a9e6719a955e9c545bcab (diff) |
Linux-libre 4.7.1-gnupck-4.7.1-gnu
Diffstat (limited to 'drivers/firmware/efi/libstub/arm64-stub.c')
-rw-r--r-- | drivers/firmware/efi/libstub/arm64-stub.c | 15 |
1 files changed, 12 insertions, 3 deletions
diff --git a/drivers/firmware/efi/libstub/arm64-stub.c b/drivers/firmware/efi/libstub/arm64-stub.c index a90f6459f..eae693eb3 100644 --- a/drivers/firmware/efi/libstub/arm64-stub.c +++ b/drivers/firmware/efi/libstub/arm64-stub.c @@ -81,15 +81,24 @@ efi_status_t handle_kernel_image(efi_system_table_t *sys_table_arg, if (IS_ENABLED(CONFIG_RANDOMIZE_BASE) && phys_seed != 0) { /* + * If CONFIG_DEBUG_ALIGN_RODATA is not set, produce a + * displacement in the interval [0, MIN_KIMG_ALIGN) that + * is a multiple of the minimal segment alignment (SZ_64K) + */ + u32 mask = (MIN_KIMG_ALIGN - 1) & ~(SZ_64K - 1); + u32 offset = !IS_ENABLED(CONFIG_DEBUG_ALIGN_RODATA) ? + (phys_seed >> 32) & mask : TEXT_OFFSET; + + /* * If KASLR is enabled, and we have some randomness available, * locate the kernel at a randomized offset in physical memory. */ - *reserve_size = kernel_memsize + TEXT_OFFSET; + *reserve_size = kernel_memsize + offset; status = efi_random_alloc(sys_table_arg, *reserve_size, MIN_KIMG_ALIGN, reserve_addr, - phys_seed); + (u32)phys_seed); - *image_addr = *reserve_addr + TEXT_OFFSET; + *image_addr = *reserve_addr + offset; } else { /* * Else, try a straight allocation at the preferred offset. |