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| author | Thomas Weißschuh <linux@weissschuh.net> | 2025-06-24 00:15:54 +0300 |
|---|---|---|
| committer | Thomas Weißschuh <linux@weissschuh.net> | 2025-07-04 14:26:07 +0300 |
| commit | 02217ad447d7b1dd592cfc8253a07375d0b32aa7 (patch) | |
| tree | fbbfcee49d68feb1cd4bd8b958c1d87dd673af36 /tools/testing | |
| parent | 358b2511d7e687a243383fbbba9cb21b242f48b8 (diff) | |
| download | linux-02217ad447d7b1dd592cfc8253a07375d0b32aa7.tar.xz | |
tools/nolibc: add support for SuperH
Add support for SuperH/"sh" to nolibc.
Only sh4 is tested for now.
The startup code is special:
__nolibc_entrypoint_epilogue() calls __builtin_unreachable() which emits
a call to abort(). To make this work a function prologue is generated to
set up a GOT pointer which corrupts "sp".
__builtin_unreachable() is necessary for __attribute__((noreturn)).
Also depending on compiler flags (for example -fPIC) even more prologue
is generated.
Work around this by defining a nested function in asm.
Link: https://gcc.gnu.org/bugzilla/show_bug.cgi?id=70216
Signed-off-by: Thomas Weißschuh <linux@weissschuh.net>
Acked-by: Willy Tarreau <w@1wt.eu>
Acked-by: Rob Landley <rob@landley.net>
Acked-by: D. Jeff Dionne <jeff@coresemi.io>
Tested-by: John Paul Adrian Glaubitz <glaubitz@physik.fu-berlin.de>
Link: https://lore.kernel.org/r/20250623-nolibc-sh-v2-3-0f5b4b303025@weissschuh.net
Diffstat (limited to 'tools/testing')
| -rw-r--r-- | tools/testing/selftests/nolibc/Makefile.nolibc | 7 | ||||
| -rwxr-xr-x | tools/testing/selftests/nolibc/run-tests.sh | 3 |
2 files changed, 9 insertions, 1 deletions
diff --git a/tools/testing/selftests/nolibc/Makefile.nolibc b/tools/testing/selftests/nolibc/Makefile.nolibc index 450d6add864c..cc5ee6c67586 100644 --- a/tools/testing/selftests/nolibc/Makefile.nolibc +++ b/tools/testing/selftests/nolibc/Makefile.nolibc @@ -62,6 +62,7 @@ ARCH_riscv64 = riscv ARCH_s390x = s390 ARCH_sparc32 = sparc ARCH_sparc64 = sparc +ARCH_sh4 = sh ARCH := $(or $(ARCH_$(XARCH)),$(XARCH)) # kernel image names by architecture @@ -89,6 +90,7 @@ IMAGE_loongarch = arch/loongarch/boot/vmlinuz.efi IMAGE_sparc32 = arch/sparc/boot/image IMAGE_sparc64 = arch/sparc/boot/image IMAGE_m68k = vmlinux +IMAGE_sh4 = arch/sh/boot/zImage IMAGE = $(objtree)/$(IMAGE_$(XARCH)) IMAGE_NAME = $(notdir $(IMAGE)) @@ -117,11 +119,13 @@ DEFCONFIG_loongarch = defconfig DEFCONFIG_sparc32 = sparc32_defconfig DEFCONFIG_sparc64 = sparc64_defconfig DEFCONFIG_m68k = virt_defconfig +DEFCONFIG_sh4 = rts7751r2dplus_defconfig DEFCONFIG = $(DEFCONFIG_$(XARCH)) EXTRACONFIG_arm = -e CONFIG_NAMESPACES EXTRACONFIG_armthumb = -e CONFIG_NAMESPACES EXTRACONFIG_m68k = -e CONFIG_BLK_DEV_INITRD +EXTRACONFIG_sh4 = -e CONFIG_BLK_DEV_INITRD -e CONFIG_CMDLINE_FROM_BOOTLOADER EXTRACONFIG = $(EXTRACONFIG_$(XARCH)) # optional tests to run (default = all) @@ -152,6 +156,7 @@ QEMU_ARCH_loongarch = loongarch64 QEMU_ARCH_sparc32 = sparc QEMU_ARCH_sparc64 = sparc64 QEMU_ARCH_m68k = m68k +QEMU_ARCH_sh4 = sh4 QEMU_ARCH = $(QEMU_ARCH_$(XARCH)) QEMU_ARCH_USER_ppc64le = ppc64le @@ -191,6 +196,7 @@ QEMU_ARGS_loongarch = -M virt -append "console=ttyS0,115200 panic=-1 $(TEST:%=N QEMU_ARGS_sparc32 = -M SS-5 -m 256M -append "console=ttyS0,115200 panic=-1 $(TEST:%=NOLIBC_TEST=%)" QEMU_ARGS_sparc64 = -M sun4u -append "console=ttyS0,115200 panic=-1 $(TEST:%=NOLIBC_TEST=%)" QEMU_ARGS_m68k = -M virt -append "console=ttyGF0,115200 panic=-1 $(TEST:%=NOLIBC_TEST=%)" +QEMU_ARGS_sh4 = -M r2d -serial file:/dev/stdout -append "console=ttySC1,115200 panic=-1 $(TEST:%=NOLIBC_TEST=%)" QEMU_ARGS = -m 1G $(QEMU_ARGS_$(XARCH)) $(QEMU_ARGS_BIOS) $(QEMU_ARGS_EXTRA) # OUTPUT is only set when run from the main makefile, otherwise @@ -218,6 +224,7 @@ CFLAGS_mipsn32be = -EB -mabi=n32 -march=mips64r6 CFLAGS_mips64le = -EL -mabi=64 -march=mips64r6 CFLAGS_mips64be = -EB -mabi=64 -march=mips64r2 CFLAGS_sparc32 = $(call cc-option,-m32) +CFLAGS_sh4 = -ml -m4 ifeq ($(origin XARCH),command line) CFLAGS_XARCH = $(CFLAGS_$(XARCH)) endif diff --git a/tools/testing/selftests/nolibc/run-tests.sh b/tools/testing/selftests/nolibc/run-tests.sh index fc8351994566..43eb30be316a 100755 --- a/tools/testing/selftests/nolibc/run-tests.sh +++ b/tools/testing/selftests/nolibc/run-tests.sh @@ -27,6 +27,7 @@ all_archs=( loongarch sparc32 sparc64 m68k + sh4 ) archs="${all_archs[@]}" @@ -187,7 +188,7 @@ test_arch() { echo "Unsupported configuration" return fi - if [ "$arch" = "m68k" ] && [ "$llvm" = "1" ]; then + if [ "$arch" = "m68k" -o "$arch" = "sh4" ] && [ "$llvm" = "1" ]; then echo "Unsupported configuration" return fi |