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selftests/nolibc: add x32 test configuration

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Nolibc supports the x32 ABI on x86.
Add a testcase to make sure the support stays functional.

QEMU user does not have support for x32, so skip the test there.

Signed-off-by: Thomas Weißschuh <linux@weissschuh.net>
Acked-by: Willy Tarreau <w@1wt.eu>
Link: https://lore.kernel.org/r/20250712-nolibc-x32-v1-2-6d81cb798710@weissschuh.net
This commit is contained in:
Thomas Weißschuh 2025-07-12 11:00:56 +02:00
parent d5094bcb5b
commit b9e5036317
2 changed files with 18 additions and 1 deletions
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12
tools/testing/selftests/nolibc/Makefile.nolibc
View file

@ -47,6 +47,7 @@ XARCH_riscv = riscv64
XARCH = $(or $(XARCH_$(ARCH)),$(ARCH))
# map from user input variants to their kernel supported architectures
ARCH_x32 = x86
ARCH_armthumb = arm
ARCH_ppc = powerpc
ARCH_ppc64 = powerpc
@ -68,6 +69,7 @@ ARCH := $(or $(ARCH_$(XARCH)),$(XARCH))
# kernel image names by architecture
IMAGE_i386 = arch/x86/boot/bzImage
IMAGE_x86_64 = arch/x86/boot/bzImage
IMAGE_x32 = arch/x86/boot/bzImage
IMAGE_x86 = arch/x86/boot/bzImage
IMAGE_arm64 = arch/arm64/boot/Image
IMAGE_arm = arch/arm/boot/zImage
@ -97,6 +99,7 @@ IMAGE_NAME = $(notdir $(IMAGE))
# default kernel configurations that appear to be usable
DEFCONFIG_i386 = defconfig
DEFCONFIG_x86_64 = defconfig
DEFCONFIG_x32 = defconfig
DEFCONFIG_x86 = defconfig
DEFCONFIG_arm64 = defconfig
DEFCONFIG_arm = multi_v7_defconfig
@ -122,6 +125,7 @@ DEFCONFIG_m68k = virt_defconfig
DEFCONFIG_sh4 = rts7751r2dplus_defconfig
DEFCONFIG = $(DEFCONFIG_$(XARCH))
EXTRACONFIG_x32 = -e CONFIG_X86_X32_ABI
EXTRACONFIG_arm = -e CONFIG_NAMESPACES
EXTRACONFIG_armthumb = -e CONFIG_NAMESPACES
EXTRACONFIG_m68k = -e CONFIG_BLK_DEV_INITRD
@ -134,6 +138,7 @@ TEST =
# QEMU_ARCH: arch names used by qemu
QEMU_ARCH_i386 = i386
QEMU_ARCH_x86_64 = x86_64
QEMU_ARCH_x32 = x86_64
QEMU_ARCH_x86 = x86_64
QEMU_ARCH_arm64 = aarch64
QEMU_ARCH_arm = arm
@ -174,6 +179,7 @@ endif
# QEMU_ARGS : some arch-specific args to pass to qemu
QEMU_ARGS_i386 = -M pc -append "console=ttyS0,9600 i8042.noaux panic=-1 $(TEST:%=NOLIBC_TEST=%)"
QEMU_ARGS_x86_64 = -M pc -append "console=ttyS0,9600 i8042.noaux panic=-1 $(TEST:%=NOLIBC_TEST=%)"
QEMU_ARGS_x32 = -M pc -append "console=ttyS0,9600 i8042.noaux panic=-1 $(TEST:%=NOLIBC_TEST=%)"
QEMU_ARGS_x86 = -M pc -append "console=ttyS0,9600 i8042.noaux panic=-1 $(TEST:%=NOLIBC_TEST=%)"
QEMU_ARGS_arm64 = -M virt -cpu cortex-a53 -append "panic=-1 $(TEST:%=NOLIBC_TEST=%)"
QEMU_ARGS_arm = -M virt -append "panic=-1 $(TEST:%=NOLIBC_TEST=%)"
@ -210,6 +216,7 @@ Q=@
endif
CFLAGS_i386 = $(call cc-option,-m32)
CFLAGS_x32 = -mx32
CFLAGS_arm = -marm
CFLAGS_armthumb = -mthumb -march=armv6t2
CFLAGS_ppc = -m32 -mbig-endian -mno-vsx $(call cc-option,-mmultiple)
@ -236,6 +243,11 @@ LDFLAGS :=
LIBGCC := -lgcc
ifeq ($(ARCH),x86)
# Not needed on x86, probably not present for x32
LIBGCC :=
endif
ifneq ($(LLVM),)
# Not needed for clang
LIBGCC :=

7
tools/testing/selftests/nolibc/run-tests.sh
View file

@ -18,7 +18,7 @@ test_mode=system
werror=1
llvm=
all_archs=(
i386 x86_64
i386 x86_64 x32
arm64 arm armthumb
mips32le mips32be mipsn32le mipsn32be mips64le mips64be
ppc ppc64 ppc64le
@ -115,6 +115,7 @@ crosstool_arch() {
mips*) echo mips;;
s390*) echo s390;;
sparc*) echo sparc64;;
x32*) echo x86_64;;
*) echo "$1";;
esac
}
@ -192,6 +193,10 @@ test_arch() {
echo "Unsupported configuration"
return
fi
if [ "$arch" = "x32" ] && [ "$test_mode" = "user" ]; then
echo "Unsupported configuration"
return
fi
mkdir -p "$build_dir"
swallow_output "${MAKE[@]}" defconfig