Re: [PATCH v3 0/8] Add objtool and orc support for LoongArch

[Huacai Chen]

Cross compiling on X86 for LoongArch fails:

  CALL    scripts/checksyscalls.sh
  DESCEND objtool
make[5]: *** No rule to make target
'/usr/lib/gcc/x86_64-redhat-linux/8/include/stdbool.h', needed by
'/home/chenhuacai/linux-official.git/tools/objtool/libsubcmd/exec-cmd.o'.
Stop.
make[4]: *** [Makefile:80:
/home/chenhuacai/linux-official.git/tools/objtool/libsubcmd/libsubcmd-in.o]
Error 2
make[3]: *** [Makefile:82:
/home/chenhuacai/linux-official.git/tools/objtool/libsubcmd/libsubcmd.a]
Error 2
make[2]: *** [Makefile:73: objtool] Error 2
make[1]: *** [/home/chenhuacai/linux-official.git/Makefile:1355:
tools/objtool] Error 2
make: *** [Makefile:234: __sub-make] Error 2

Huacai

On Fri, Oct 20, 2023 at 10:27 AM Tiezhu Yang <yangtiezhu@xxxxxxxxxxx> wrote:
>
> This version is based on the latest torvalds/linux.git (20231020)
> which includes the commit 00c2ca84c680 ("LoongArch: Use SYM_CODE_*
> to annotate exception handlers"), tested with the latest upstream
> gcc and binutils (20231009).
>
> v3:
>   -- Use tab for indentation in special.h
>   -- Replace BP/bp with FP/fp
>   -- Modify jirl decoder to handle special case in hibernate_asm.o
>   -- Remove the calling of bswap_if_needed() which always return false
>   -- Remove OBJECT_FILES_NON_STANDARD_suspend_asm.o
>   -- Remove check of assembler version in Makefile
>   -- Remove UNWIND_HINT_EMPTY in kernel_entry
>   -- Put unwind_init() after cpu_probe()
>   -- Remove CONFIG_BPF_JIT_ALWAYS_ON in defconfig
>   -- Rename title of patch #8 to "Add ORC stack unwinder support"
>   -- Fix build error of scripts/sorttable.h reported by test robot
>   -- Add exception_table[] to save exception handlers
>
> 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 about sibling call
>   objtool: Check local label in add_dead_ends()
>   objtool: Check local label in read_unwind_hints()
>   LoongArch: Add ORC stack unwinder support
>
>  arch/loongarch/Kconfig                             |   2 +
>  arch/loongarch/Kconfig.debug                       |  11 +
>  arch/loongarch/Makefile                            |  18 +
>  arch/loongarch/include/asm/Kbuild                  |   1 +
>  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            |  19 +
>  arch/loongarch/include/asm/orc_lookup.h            |  34 ++
>  arch/loongarch/include/asm/orc_types.h             |  58 +++
>  arch/loongarch/include/asm/stackframe.h            |   3 +
>  arch/loongarch/include/asm/unwind.h                |  22 +-
>  arch/loongarch/include/asm/unwind_hints.h          |  28 ++
>  arch/loongarch/kernel/Makefile                     |   3 +
>  arch/loongarch/kernel/entry.S                      |   5 +
>  arch/loongarch/kernel/genex.S                      |   4 +
>  arch/loongarch/kernel/module.c                     |  11 +-
>  arch/loongarch/kernel/relocate_kernel.S            |   2 +
>  arch/loongarch/kernel/setup.c                      |   2 +
>  arch/loongarch/kernel/stacktrace.c                 |   1 +
>  arch/loongarch/kernel/traps.c                      |  44 +-
>  arch/loongarch/kernel/unwind_orc.c                 | 522 +++++++++++++++++++++
>  arch/loongarch/kernel/vmlinux.lds.S                |   3 +
>  arch/loongarch/lib/Makefile                        |   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              | 352 ++++++++++++++
>  .../objtool/arch/loongarch/include/arch/cfi_regs.h |  22 +
>  tools/objtool/arch/loongarch/include/arch/elf.h    |  30 ++
>  .../objtool/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                              | 118 +++--
>  tools/objtool/include/objtool/orc.h                |  14 +
>  tools/objtool/orc_dump.c                           |  69 +--
>  tools/objtool/orc_gen.c                            | 113 +----
>  46 files changed, 1964 insertions(+), 257 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
>
> --
> 2.1.0
>