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e47d3a3088
This permits an AArch64AbsLongThunk to be used in an environment where unaligned accesses are disabled. The AArch64AbsLongThunk does a load of an 8-byte address. When unaligned accesses are disabled this address must be 8-byte aligned. The vast majority of AArch64 systems will have unaligned accesses enabled in userspace. However, after a reset, before the MMU has been enabled, all memory accesses are to "device" memory, which requires aligned accesses. In systems with multi-stage boot loaders a thunk may be required to a later stage before the MMU has been enabled. As we only want to increase the alignment when the ldr is used we delay the increase in thunk alignment until we know we are going to write an ldr. We also need to account for the ThunkSection alignment increase when this happens. In some of the test updates, particularly those with shared CHECK lines with position independent thunks it was easier to ensure that the thunks started at an 8-byte aligned address in all cases.
LLVM Linker (lld)
This directory and its subdirectories contain source code for the LLVM Linker, a modular cross platform linker which is built as part of the LLVM compiler infrastructure project.
lld is open source software. You may freely distribute it under the terms of the license agreement found in LICENSE.txt.
Benchmarking
In order to make sure various developers can evaluate patches over the same tests, we create a collection of self contained programs.
It is hosted at https://s3-us-west-2.amazonaws.com/linker-tests/lld-speed-test.tar.xz
The current sha256 is 10eec685463d5a8bbf08d77f4ca96282161d396c65bd97dc99dbde644a31610f.