arm64: assembler: make adr_l work in modules under KASLR
authorArd Biesheuvel <ard.biesheuvel@linaro.org>
Wed, 11 Jan 2017 14:54:53 +0000 (14:54 +0000)
committerCatalin Marinas <catalin.marinas@arm.com>
Thu, 12 Jan 2017 18:10:52 +0000 (18:10 +0000)
commit41c066f2c4d436c535616fe182331766c57838f0
treea805b9567c20c7d8b3853d57b6915b80ca7c5b49
parent69d012345a1a32d3f03957f14d972efccc106a98
arm64: assembler: make adr_l work in modules under KASLR

When CONFIG_RANDOMIZE_MODULE_REGION_FULL=y, the offset between loaded
modules and the core kernel may exceed 4 GB, putting symbols exported
by the core kernel out of the reach of the ordinary adrp/add instruction
pairs used to generate relative symbol references. So make the adr_l
macro emit a movz/movk sequence instead when executing in module context.

While at it, remove the pointless special case for the stack pointer.

Acked-by: Mark Rutland <mark.rutland@arm.com>
Acked-by: Will Deacon <will.deacon@arm.com>
Signed-off-by: Ard Biesheuvel <ard.biesheuvel@linaro.org>
Signed-off-by: Catalin Marinas <catalin.marinas@arm.com>
arch/arm64/include/asm/assembler.h