On Tue, Jul 30, 2019 at 11:01 AM Kees Cook <keescook@xxxxxxxxxxxx> wrote: > > On Mon, Jul 08, 2019 at 10:48:53AM -0700, Thomas Garnier wrote: > > Splitting the previous series in two. This part contains assembly code > > changes required for PIE but without any direct dependencies with the > > rest of the patchset. > > > > Changes: > > - patch v8 (assembly): > > - Fix issues in crypto changes (thanks to Eric Biggers). > > - Remove unnecessary jump table change. > > - Change author and signoff to chromium email address. > > With -rc2 done, is this a good time for this to land in -tip? Are there > more steps needed for review? I have a minor feedback and rebase that I am about to send (v9). It seems like a good one to send to tip if there is no major feedback. > > Thanks! > > -Kees > > > - 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, 3-11: Change in assembly code to be PIE compliant. > > - 2: 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/aesni-intel_avx-x86_64.S | 3 - > > 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 | 18 ++++-- > > entry/entry_64.S | 16 ++++-- > > include/asm/alternative.h | 6 +- > > include/asm/asm.h | 1 > > include/asm/paravirt_types.h | 25 +++++++-- > > 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, 306 insertions(+), 213 deletions(-) > > > > Patchset is based on next-20190708. > > > > > > -- > Kees Cook
