diff options
| author | Ard Biesheuvel <ard.biesheuvel@linaro.org> | 2016-02-16 13:52:40 +0100 |
|---|---|---|
| committer | Catalin Marinas <catalin.marinas@arm.com> | 2016-02-18 18:16:44 +0000 |
| commit | f9040773b7bbbd9e98eb6184a263512a7cfc133f (patch) | |
| tree | 8af5e77510e3774356f737a8674954e776001e93 /arch/arm64/mm/dump.c | |
| parent | a0bf9776cd0be4490d4675d4108e13379849fc7f (diff) | |
arm64: move kernel image to base of vmalloc area
This moves the module area to right before the vmalloc area, and moves
the kernel image to the base of the vmalloc area. This is an intermediate
step towards implementing KASLR, which allows the kernel image to be
located anywhere in the vmalloc area.
Since other subsystems such as hibernate may still need to refer to the
kernel text or data segments via their linears addresses, both are mapped
in the linear region as well. The linear alias of the text region is
mapped read-only/non-executable to prevent inadvertent modification or
execution.
Signed-off-by: Ard Biesheuvel <ard.biesheuvel@linaro.org>
Signed-off-by: Catalin Marinas <catalin.marinas@arm.com>
Diffstat (limited to 'arch/arm64/mm/dump.c')
| -rw-r--r-- | arch/arm64/mm/dump.c | 12 |
1 files changed, 6 insertions, 6 deletions
diff --git a/arch/arm64/mm/dump.c b/arch/arm64/mm/dump.c index 0841b2bf0e6a..6be918478f85 100644 --- a/arch/arm64/mm/dump.c +++ b/arch/arm64/mm/dump.c @@ -35,7 +35,9 @@ struct addr_marker { }; enum address_markers_idx { - VMALLOC_START_NR = 0, + MODULES_START_NR = 0, + MODULES_END_NR, + VMALLOC_START_NR, VMALLOC_END_NR, #ifdef CONFIG_SPARSEMEM_VMEMMAP VMEMMAP_START_NR, @@ -45,12 +47,12 @@ enum address_markers_idx { FIXADDR_END_NR, PCI_START_NR, PCI_END_NR, - MODULES_START_NR, - MODULES_END_NR, KERNEL_SPACE_NR, }; static struct addr_marker address_markers[] = { + { MODULES_VADDR, "Modules start" }, + { MODULES_END, "Modules end" }, { VMALLOC_START, "vmalloc() Area" }, { VMALLOC_END, "vmalloc() End" }, #ifdef CONFIG_SPARSEMEM_VMEMMAP @@ -61,9 +63,7 @@ static struct addr_marker address_markers[] = { { FIXADDR_TOP, "Fixmap end" }, { PCI_IO_START, "PCI I/O start" }, { PCI_IO_END, "PCI I/O end" }, - { MODULES_VADDR, "Modules start" }, - { MODULES_END, "Modules end" }, - { PAGE_OFFSET, "Kernel Mapping" }, + { PAGE_OFFSET, "Linear Mapping" }, { -1, NULL }, }; |