Splitting the previous serie in two. This part contains assembly code
changes required for PIE but without any direct dependencies with the
rest of the patchset.
Changes:
- patch v7 (assembly):
- Split patchset and reorder changes.
- patch v6:
- Rebase on latest changes in jump tables and crypto.
- Fix wording on couple commits.
- Revisit checkpatch warnings.
- Moving to @chromium.org.
- patch v5:
- Adapt new crypto modules for PIE.
- Improve per-cpu commit message.
- Fix xen 32-bit build error with .quad.
- Remove extra code for ftrace.
- patch v4:
- Simplify early boot by removing global variables.
- Modify the mcount location script for __mcount_loc intead of the address
read in the ftrace implementation.
- Edit commit description to explain better where the kernel can be located.
- Streamlined the testing done on each patch proposal. Always testing
hibernation, suspend, ftrace and kprobe to ensure no regressions.
- patch v3:
- Update on message to describe longer term PIE goal.
- Minor change on ftrace if condition.
- Changed code using xchgq.
- patch v2:
- Adapt patch to work post KPTI and compiler changes
- Redo all performance testing with latest configs and compilers
- Simplify mov macro on PIE (MOVABS now)
- Reduce GOT footprint
- patch v1:
- Simplify ftrace implementation.
- Use gcc mstack-protector-guard-reg=%gs with PIE when possible.
- rfc v3:
- Use --emit-relocs instead of -pie to reduce dynamic relocation space on
mapped memory. It also simplifies the relocation process.
- Move the start the module section next to the kernel. Remove the need for
-mcmodel=large on modules. Extends module space from 1 to 2G maximum.
- Support for XEN PVH as 32-bit relocations can be ignored with
--emit-relocs.
- Support for GOT relocations previously done automatically with -pie.
- Remove need for dynamic PLT in modules.
- Support dymamic GOT for modules.
- rfc v2:
- Add support for global stack cookie while compiler default to fs without
mcmodel=kernel
- Change patch 7 to correctly jump out of the identity mapping on kexec load
preserve.
These patches make some of the changes necessary to build the kernel as
Position Independent Executable (PIE) on x86_64. Another patchset will
add the PIE option and larger architecture changes.
The patches:
- 1-2, 4-12: Change in assembly code to be PIE compliant.
- 3: Add a new _ASM_MOVABS macro to fetch a symbol address generically.
diffstat:
crypto/aegis128-aesni-asm.S |6 +-
crypto/aegis128l-aesni-asm.S|8 +--
crypto/aegis256-aesni-asm.S |6 +-
crypto/aes-x86_64-asm_64.S | 45 ++--
crypto/aesni-intel_asm.S|8 +--
crypto/camellia-aesni-avx-asm_64.S | 42 +++
crypto/camellia-aesni-avx2-asm_64.S | 44
crypto/camellia-x86_64-asm_64.S |8 +--
crypto/cast5-avx-x86_64-asm_64.S| 50 ++
crypto/cast6-avx-x86_64-asm_64.S| 44 +---
crypto/des3_ede-asm_64.S| 96
crypto/ghash-clmulni-intel_asm.S|4 -
crypto/glue_helper-asm-avx.S|4 -
crypto/glue_helper-asm-avx2.S |6 +-
crypto/morus1280-avx2-asm.S |4 -
crypto/morus1280-sse2-asm.S |8 +--
crypto/morus640-sse2-asm.S |6 +-
crypto/sha256-avx2-asm.S| 23 +---
entry/entry_64.S| 16 --
include/asm/alternative.h |6 +-
include/asm/asm.h |1
include/asm/jump_label.h|8 +--
include/asm/paravirt_types.h| 12 +++-
include/asm/pm-trace.h |2
include/asm/processor.h |6 +-
kernel/acpi/wakeup_64.S | 31 ++-
kernel/head_64.S| 16 +++---
kernel/relocate_kernel_64.S |2
power/hibernate_asm_64.S|4 -
29 files changed, 299 insertions(+), 217 deletions(-)
Patchset is based on next-20190515.
