Based on tip/objtool/core. Mark reported that the ORC unwinder incorrectly marks an unwind as reliable when the unwind terminates prematurely in the dark corners of return_to_handler() due to lack of information about the next frame. The problem is UNWIND_HINT_EMPTY is used in two different situations: end-of-stack marker and undefined stack state. Split it up into UNWIND_HINT_END_OF_STACK and UNWIND_HINT_UNDEFINED. Josh Poimboeuf (6): objtool: Add objtool_types.h objtool: Use relative pointers for annotations objtool: Change UNWIND_HINT() argument order x86,objtool: Introduce ORC_TYPE_* x86,objtool: Separate unret validation from unwind hints x86,objtool: Split UNWIND_HINT_EMPTY in two .../livepatch/reliable-stacktrace.rst | 2 +- MAINTAINERS | 2 +- arch/x86/entry/entry_64.S | 26 +-- arch/x86/include/asm/nospec-branch.h | 14 +- arch/x86/include/asm/orc_types.h | 12 +- arch/x86/include/asm/unwind_hints.h | 18 +- arch/x86/kernel/ftrace_64.S | 2 +- arch/x86/kernel/head_64.S | 17 +- arch/x86/kernel/relocate_kernel_64.S | 10 +- arch/x86/kernel/unwind_orc.c | 27 ++- arch/x86/lib/retpoline.S | 6 +- arch/x86/platform/pvh/head.S | 2 +- arch/x86/xen/xen-asm.S | 4 +- arch/x86/xen/xen-head.S | 4 +- include/linux/objtool.h | 81 +++---- include/linux/objtool_types.h | 57 +++++ scripts/sorttable.h | 2 +- tools/arch/x86/include/asm/orc_types.h | 12 +- tools/include/linux/objtool.h | 200 ------------------ tools/include/linux/objtool_types.h | 57 +++++ tools/objtool/check.c | 69 ++++-- tools/objtool/include/objtool/check.h | 4 +- tools/objtool/orc_dump.c | 15 +- tools/objtool/orc_gen.c | 43 ++-- tools/objtool/sync-check.sh | 2 +- 25 files changed, 314 insertions(+), 374 deletions(-) create mode 100644 include/linux/objtool_types.h delete mode 100644 tools/include/linux/objtool.h create mode 100644 tools/include/linux/objtool_types.h -- 2.39.1
