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    Subject[PATCH v12 05/21] x86/stacktool: Add file and directory ignores
    Date
    Tell stacktool to skip validation of the following code:

    - boot image
    - vdso image
    - kexec purgatory
    - realmode
    - efi libstub
    - scripts/mod

    They all run outside the kernel's normal mode of operation and they
    don't affect runtime kernel stack traces, so they're free to skirt the
    stacktool rules.

    Signed-off-by: Josh Poimboeuf <jpoimboe@redhat.com>
    ---
    arch/x86/boot/Makefile | 3 ++-
    arch/x86/boot/compressed/Makefile | 3 ++-
    arch/x86/entry/vdso/Makefile | 5 ++++-
    arch/x86/purgatory/Makefile | 2 ++
    arch/x86/realmode/Makefile | 4 +++-
    arch/x86/realmode/rm/Makefile | 3 ++-
    drivers/firmware/efi/libstub/Makefile | 1 +
    scripts/mod/Makefile | 2 ++
    8 files changed, 18 insertions(+), 5 deletions(-)

    diff --git a/arch/x86/boot/Makefile b/arch/x86/boot/Makefile
    index 0d553e5..fe96b2f 100644
    --- a/arch/x86/boot/Makefile
    +++ b/arch/x86/boot/Makefile
    @@ -14,7 +14,8 @@
    # Set it to -DSVGA_MODE=NORMAL_VGA if you just want the EGA/VGA mode.
    # The number is the same as you would ordinarily press at bootup.

    -KASAN_SANITIZE := n
    +KASAN_SANITIZE := n
    +STACKTOOL := n

    SVGA_MODE := -DSVGA_MODE=NORMAL_VGA

    diff --git a/arch/x86/boot/compressed/Makefile b/arch/x86/boot/compressed/Makefile
    index 0a291cd..8cea814 100644
    --- a/arch/x86/boot/compressed/Makefile
    +++ b/arch/x86/boot/compressed/Makefile
    @@ -16,7 +16,8 @@
    # (see scripts/Makefile.lib size_append)
    # compressed vmlinux.bin.all + u32 size of vmlinux.bin.all

    -KASAN_SANITIZE := n
    +KASAN_SANITIZE := n
    +STACKTOOL := n

    targets := vmlinux vmlinux.bin vmlinux.bin.gz vmlinux.bin.bz2 vmlinux.bin.lzma \
    vmlinux.bin.xz vmlinux.bin.lzo vmlinux.bin.lz4
    diff --git a/arch/x86/entry/vdso/Makefile b/arch/x86/entry/vdso/Makefile
    index a3d0767..8095694 100644
    --- a/arch/x86/entry/vdso/Makefile
    +++ b/arch/x86/entry/vdso/Makefile
    @@ -3,7 +3,9 @@
    #

    KBUILD_CFLAGS += $(DISABLE_LTO)
    -KASAN_SANITIZE := n
    +
    +KASAN_SANITIZE := n
    +STACKTOOL := n

    VDSO64-$(CONFIG_X86_64) := y
    VDSOX32-$(CONFIG_X86_X32_ABI) := y
    @@ -15,6 +17,7 @@ vobjs-y := vdso-note.o vclock_gettime.o vgetcpu.o

    # files to link into kernel
    obj-y += vma.o
    +STACKTOOL_vma.o := y

    # vDSO images to build
    vdso_img-$(VDSO64-y) += 64
    diff --git a/arch/x86/purgatory/Makefile b/arch/x86/purgatory/Makefile
    index 2c835e3..30d7d58 100644
    --- a/arch/x86/purgatory/Makefile
    +++ b/arch/x86/purgatory/Makefile
    @@ -1,3 +1,5 @@
    +STACKTOOL := n
    +
    purgatory-y := purgatory.o stack.o setup-x86_$(BITS).o sha256.o entry64.o string.o

    targets += $(purgatory-y)
    diff --git a/arch/x86/realmode/Makefile b/arch/x86/realmode/Makefile
    index e02c2c6..0c24689 100644
    --- a/arch/x86/realmode/Makefile
    +++ b/arch/x86/realmode/Makefile
    @@ -6,7 +6,9 @@
    # for more details.
    #
    #
    -KASAN_SANITIZE := n
    +KASAN_SANITIZE := n
    +STACKTOOL := n
    +
    subdir- := rm

    obj-y += init.o
    diff --git a/arch/x86/realmode/rm/Makefile b/arch/x86/realmode/rm/Makefile
    index 2730d77..1da2e5b 100644
    --- a/arch/x86/realmode/rm/Makefile
    +++ b/arch/x86/realmode/rm/Makefile
    @@ -6,7 +6,8 @@
    # for more details.
    #
    #
    -KASAN_SANITIZE := n
    +KASAN_SANITIZE := n
    +STACKTOOL := n

    always := realmode.bin realmode.relocs

    diff --git a/drivers/firmware/efi/libstub/Makefile b/drivers/firmware/efi/libstub/Makefile
    index 816dbe9..a612cdb 100644
    --- a/drivers/firmware/efi/libstub/Makefile
    +++ b/drivers/firmware/efi/libstub/Makefile
    @@ -20,6 +20,7 @@ KBUILD_CFLAGS := $(cflags-y) \

    GCOV_PROFILE := n
    KASAN_SANITIZE := n
    +STACKTOOL := n

    lib-y := efi-stub-helper.o
    lib-$(CONFIG_EFI_ARMSTUB) += arm-stub.o fdt.o
    diff --git a/scripts/mod/Makefile b/scripts/mod/Makefile
    index c11212f..496184d 100644
    --- a/scripts/mod/Makefile
    +++ b/scripts/mod/Makefile
    @@ -1,3 +1,5 @@
    +STACKTOOL := n
    +
    hostprogs-y := modpost mk_elfconfig
    always := $(hostprogs-y) empty.o

    --
    2.4.3


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