The previous version of CET Branch Tracking/PTRACE patches is here: https://lkml.org/lkml/2019/6/6/1030 Summary of changes from v7: Change legacy bitmap to a special mapping (patch #14). Rebase to v5.3-rc4. Small fixes in response to comments. H.J. Lu (5): x86/cet/ibt: Add arch_prctl functions for IBT x86/vdso: Insert endbr32/endbr64 to vDSO x86/vdso/32: Add ENDBR32 to __kernel_vsyscall entry point x86/vsyscall/64: Add ENDBR64 to vsyscall entry points x86: Discard .note.gnu.property sections Yu-cheng Yu (9): x86/cet/ibt: Add Kconfig option for user-mode Indirect Branch Tracking x86/cet/ibt: User-mode indirect branch tracking support x86/cet/ibt: Handle signals for end branch mm/mmap: Add IBT bitmap size to address space limit check x86/cet/ibt: ELF header parsing for IBT x86/cet/ibt: Add ENDBR to op-code-map x86/vsyscall/64: Fixup shadow stack and branch tracking for vsyscall x86/cet: Add PTRACE interface for CET Introduce arch_prctl(ARCH_X86_CET_MARK_LEGACY_CODE) arch/x86/Kconfig | 17 ++ arch/x86/Makefile | 7 + arch/x86/entry/vdso/Makefile | 12 +- arch/x86/entry/vdso/vdso-layout.lds.S | 1 + arch/x86/entry/vdso/vdso32/system_call.S | 3 + arch/x86/entry/vsyscall/vsyscall_64.c | 29 +++ arch/x86/entry/vsyscall/vsyscall_emu_64.S | 9 + arch/x86/entry/vsyscall/vsyscall_trace.h | 1 + arch/x86/include/asm/cet.h | 9 + arch/x86/include/asm/disabled-features.h | 8 +- arch/x86/include/asm/fpu/regset.h | 7 +- arch/x86/include/asm/mmu_context.h | 10 + arch/x86/include/asm/processor.h | 13 +- arch/x86/include/uapi/asm/prctl.h | 3 + arch/x86/kernel/Makefile | 2 +- arch/x86/kernel/cet.c | 54 +++++ arch/x86/kernel/cet_bitmap.c | 210 ++++++++++++++++++ arch/x86/kernel/cet_prctl.c | 19 ++ arch/x86/kernel/cpu/common.c | 17 ++ arch/x86/kernel/fpu/regset.c | 41 ++++ arch/x86/kernel/process_64.c | 5 + arch/x86/kernel/ptrace.c | 16 ++ arch/x86/kernel/vmlinux.lds.S | 10 + arch/x86/lib/x86-opcode-map.txt | 13 +- include/uapi/linux/elf.h | 1 + mm/memory.c | 8 + mm/mmap.c | 19 +- .../arch/x86/include/asm/disabled-features.h | 8 +- tools/objtool/arch/x86/lib/x86-opcode-map.txt | 13 +- 29 files changed, 552 insertions(+), 13 deletions(-) create mode 100644 arch/x86/kernel/cet_bitmap.c -- 2.17.1
