Port objtool and the klp-build tooling (for building livepatch modules) to arm64.
Note this doesn't bring all the objtool bells and whistles to arm64, nor any of the CFG reverse engineering. This only adds the bare minimum needed for 'objtool --checksum'. And note that objtool still doesn't get enabled at all for normal arm64 kernel builds, so this doesn't affect any users other than those running klp-build directly. Josh Poimboeuf (14): objtool: Fix data alignment in elf_add_data() objtool: Fix ERROR_INSN() error message arm64: Annotate intra-function calls arm64: head: Move boot header to .head.data arm64: Fix EFI linking with -fdata-sections crypto: arm64: Move data to .rodata objtool: Extricate checksum calculation from validate_branch() objtool: Allow setting --mnop without --mcount kbuild: Only run objtool if there is at least one command objtool: Ignore jumps to the end of the function for non-CFG arches objtool: Allow empty alternatives objtool: Reuse consecutive string references objtool: Introduce objtool for arm64 klp-build: Support cross-compilation arch/arm64/Kconfig | 2 + arch/arm64/kernel/entry.S | 2 + arch/arm64/kernel/head.S | 2 +- arch/arm64/kernel/proton-pack.c | 12 +- arch/arm64/kernel/vmlinux.lds.S | 2 +- arch/x86/boot/startup/Makefile | 2 +- include/asm-generic/vmlinux.lds.h | 2 +- include/linux/init.h | 1 + lib/crypto/arm64/sha2-armv8.pl | 11 +- scripts/Makefile.build | 4 +- scripts/Makefile.lib | 46 +++---- scripts/Makefile.vmlinux_o | 15 +-- scripts/livepatch/klp-build | 11 +- tools/objtool/Makefile | 4 + tools/objtool/arch/arm64/Build | 2 + tools/objtool/arch/arm64/decode.c | 116 ++++++++++++++++++ .../arch/arm64/include/arch/cfi_regs.h | 11 ++ tools/objtool/arch/arm64/include/arch/elf.h | 13 ++ .../objtool/arch/arm64/include/arch/special.h | 21 ++++ tools/objtool/arch/arm64/special.c | 21 ++++ tools/objtool/builtin-check.c | 5 - tools/objtool/check.c | 83 +++++++++---- tools/objtool/elf.c | 11 +- tools/objtool/include/objtool/checksum.h | 6 +- tools/objtool/include/objtool/warn.h | 2 +- 25 files changed, 323 insertions(+), 84 deletions(-) create mode 100644 tools/objtool/arch/arm64/Build create mode 100644 tools/objtool/arch/arm64/decode.c create mode 100644 tools/objtool/arch/arm64/include/arch/cfi_regs.h create mode 100644 tools/objtool/arch/arm64/include/arch/elf.h create mode 100644 tools/objtool/arch/arm64/include/arch/special.h create mode 100644 tools/objtool/arch/arm64/special.c -- 2.53.0
