[PATCH v6 0/8] Add objtool, orc and livepatching support for LoongArch

[Tiezhu Yang]

This version is based on 6.8-rc2, tested with the latest upstream
gcc and binutils (20240129).

v6:
  -- Add "-mno-relax" option
  -- Remove "-fno-optimize-sibling-calls" option
  -- Remove "-falign-functions=4 -falign-labels=4" options
  -- Remove "#ifdef CONFIG_CPU_HAS_LBT" in lbt.S
  -- Remove patch "objtool: Check local label about sibling call"
  -- Silence the objtool warnings under CONFIG_FUNCTION_TRACER
  -- Add livepatching support and fix the problems when testing

Tiezhu Yang (8):
  objtool/LoongArch: Enable objtool to be built
  objtool/LoongArch: Implement instruction decoder
  objtool/x86: Separate arch-specific and generic parts
  objtool/LoongArch: Enable orc to be built
  objtool: Check local label in add_dead_ends()
  objtool: Check local label in read_unwind_hints()
  LoongArch: Add ORC stack unwinder support
  LoongArch: Add kernel livepatching support

 arch/loongarch/Kconfig                        |   6 +
 arch/loongarch/Kconfig.debug                  |  11 +
 arch/loongarch/Makefile                       |  23 +-
 arch/loongarch/include/asm/Kbuild             |   2 +
 arch/loongarch/include/asm/bug.h              |   1 +
 arch/loongarch/include/asm/exception.h        |   2 +
 arch/loongarch/include/asm/module.h           |   7 +
 arch/loongarch/include/asm/orc_header.h       |  18 +
 arch/loongarch/include/asm/orc_lookup.h       |  31 ++
 arch/loongarch/include/asm/orc_types.h        |  58 ++
 arch/loongarch/include/asm/stackframe.h       |   3 +
 arch/loongarch/include/asm/thread_info.h      |   2 +
 arch/loongarch/include/asm/unwind.h           |  20 +-
 arch/loongarch/include/asm/unwind_hints.h     |  28 +
 arch/loongarch/kernel/Makefile                |   4 +
 arch/loongarch/kernel/entry.S                 |   5 +
 arch/loongarch/kernel/fpu.S                   |   7 +
 arch/loongarch/kernel/genex.S                 |   6 +
 arch/loongarch/kernel/lbt.S                   |   2 +
 arch/loongarch/kernel/mcount_dyn.S            |   6 +
 arch/loongarch/kernel/module.c                |  22 +-
 arch/loongarch/kernel/relocate_kernel.S       |   8 +-
 arch/loongarch/kernel/rethook_trampoline.S    |   1 +
 arch/loongarch/kernel/setup.c                 |   2 +
 arch/loongarch/kernel/stacktrace.c            |  42 ++
 arch/loongarch/kernel/traps.c                 |  42 +-
 arch/loongarch/kernel/unwind_orc.c            | 516 ++++++++++++++++++
 arch/loongarch/kernel/vmlinux.lds.S           |   3 +
 arch/loongarch/kvm/switch.S                   |   9 +-
 arch/loongarch/lib/clear_user.S               |   2 +
 arch/loongarch/lib/copy_user.S                |   2 +
 arch/loongarch/lib/memcpy.S                   |   2 +
 arch/loongarch/lib/memset.S                   |   2 +
 arch/loongarch/mm/tlb.c                       |  27 +-
 arch/loongarch/mm/tlbex.S                     |   9 +
 arch/loongarch/vdso/Makefile                  |   1 +
 include/linux/compiler.h                      |   9 +
 scripts/Makefile                              |   7 +-
 tools/arch/loongarch/include/asm/inst.h       | 161 ++++++
 tools/arch/loongarch/include/asm/orc_types.h  |  58 ++
 tools/include/linux/bitops.h                  |  11 +
 tools/objtool/Makefile                        |   4 +
 tools/objtool/arch/loongarch/Build            |   3 +
 tools/objtool/arch/loongarch/decode.c         | 356 ++++++++++++
 .../arch/loongarch/include/arch/cfi_regs.h    |  22 +
 .../objtool/arch/loongarch/include/arch/elf.h |  30 +
 .../arch/loongarch/include/arch/special.h     |  33 ++
 tools/objtool/arch/loongarch/orc.c            | 171 ++++++
 tools/objtool/arch/loongarch/special.c        |  15 +
 tools/objtool/arch/x86/Build                  |   1 +
 tools/objtool/arch/x86/orc.c                  | 188 +++++++
 tools/objtool/check.c                         |  52 +-
 tools/objtool/include/objtool/elf.h           |   1 +
 tools/objtool/include/objtool/orc.h           |  14 +
 tools/objtool/orc_dump.c                      |  69 +--
 tools/objtool/orc_gen.c                       | 113 +---
 56 files changed, 2011 insertions(+), 239 deletions(-)
 create mode 100644 arch/loongarch/include/asm/orc_header.h
 create mode 100644 arch/loongarch/include/asm/orc_lookup.h
 create mode 100644 arch/loongarch/include/asm/orc_types.h
 create mode 100644 arch/loongarch/include/asm/unwind_hints.h
 create mode 100644 arch/loongarch/kernel/unwind_orc.c
 create mode 100644 tools/arch/loongarch/include/asm/inst.h
 create mode 100644 tools/arch/loongarch/include/asm/orc_types.h
 create mode 100644 tools/objtool/arch/loongarch/Build
 create mode 100644 tools/objtool/arch/loongarch/decode.c
 create mode 100644 tools/objtool/arch/loongarch/include/arch/cfi_regs.h
 create mode 100644 tools/objtool/arch/loongarch/include/arch/elf.h
 create mode 100644 tools/objtool/arch/loongarch/include/arch/special.h
 create mode 100644 tools/objtool/arch/loongarch/orc.c
 create mode 100644 tools/objtool/arch/loongarch/special.c
 create mode 100644 tools/objtool/arch/x86/orc.c
 create mode 100644 tools/objtool/include/objtool/orc.h

-- 
2.42.0