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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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