On Thu, Jan 14, 2021 at 8:40 PM Josh Poimboeuf <jpoim...@redhat.com> wrote: > > Add support for proper vmlinux.o validation, which will be needed for > Sami's upcoming x86 LTO set. (And vmlinux validation is the future for > objtool anyway, for other reasons.) > > This isn't 100% done -- most notably, crypto still needs to be supported > -- but I think this gets us most of the way there. > > This can also be found at > > git://git.kernel.org/pub/scm/linux/kernel/git/jpoimboe/linux.git > objtool-vmlinux > > And for more testing it can be combined with Sami's x86 LTO patches: > > https://github.com/samitolvanen/linux clang-lto > > > > Josh Poimboeuf (21): > objtool: Fix seg fault in BT_FUNC() with fake jump > objtool: Fix error handling for STD/CLD warnings > objtool: Fix retpoline detection in asm code > objtool: Fix ".cold" section suffix check for newer versions of GCC > objtool: Support retpoline jump detection for vmlinux.o > x86/ftrace: Add UNWIND_HINT_FUNC annotation for ftrace_stub > objtool: Assume only ELF functions do sibling calls > objtool: Add asm version of STACK_FRAME_NON_STANDARD > objtool: Combine UNWIND_HINT_RET_OFFSET and UNWIND_HINT_FUNC > objtool: Add xen_start_kernel() to noreturn list > objtool: Move unsuffixed symbol conversion to a helper function > objtool: Add CONFIG_CFI_CLANG support > x86/xen: Support objtool validation in xen-asm.S > x86/xen: Support objtool vmlinux.o validation in xen-head.S > x86/xen/pvh: Convert indirect jump to retpoline > x86/ftrace: Support objtool vmlinux.o validation in ftrace_64.S > x86/acpi: Convert indirect jump to retpoline > x86/acpi: Support objtool validation in wakeup_64.S > x86/power: Convert indirect jumps to retpolines > x86/power: Move restore_registers() to top of the file > x86/power: Support objtool validation in hibernate_asm_64.S > > arch/x86/include/asm/unwind_hints.h | 13 +--- > arch/x86/kernel/acpi/Makefile | 1 - > arch/x86/kernel/acpi/wakeup_64.S | 5 +- > arch/x86/kernel/ftrace_64.S | 8 +-- > arch/x86/lib/retpoline.S | 2 +- > arch/x86/platform/pvh/head.S | 3 +- > arch/x86/power/Makefile | 1 - > arch/x86/power/hibernate_asm_64.S | 105 ++++++++++++++-------------- > arch/x86/xen/Makefile | 1 - > arch/x86/xen/xen-asm.S | 29 +++++--- > arch/x86/xen/xen-head.S | 5 +- > include/linux/objtool.h | 13 +++- > tools/include/linux/objtool.h | 13 +++- > tools/objtool/arch/x86/decode.c | 4 +- > tools/objtool/arch/x86/special.c | 2 +- > tools/objtool/check.c | 91 +++++++++++++----------- > tools/objtool/check.h | 12 +++- > tools/objtool/elf.c | 87 +++++++++++++++++------ > tools/objtool/elf.h | 2 +- > 19 files changed, 241 insertions(+), 156 deletions(-) > > -- > 2.29.2 >
I tried this series on top of clang-cfi and it segfaults here. + info OBJTOOL vmlinux.o + [ != silent_ ] + printf %-7s %s\n OBJTOOL vmlinux.o OBJTOOL vmlinux.o + tools/objtool/objtool orc generate --duplicate --mcount --vmlinux --no-fp --no-unreachable --retpoline --uaccess vmlinux.o Segmentation fault + on_exit + [ 139 -ne 0 ] + cleanup + rm -f .btf.* + rm -f .tmp_System.map + rm -f .tmp_initcalls.lds + rm -f .tmp_symversions.lds + rm -f .tmp_vmlinux* + rm -f System.map + rm -f vmlinux + rm -f vmlinux.o make[3]: *** [Makefile:1213: vmlinux] Error 139 - Sedat -
