diff options
author | Linus Torvalds <torvalds@linux-foundation.org> | 2023-10-31 06:52:45 +0300 |
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committer | Linus Torvalds <torvalds@linux-foundation.org> | 2023-10-31 06:52:45 +0300 |
commit | c9049984f0e470af865c497c7f785fe895e5da9c (patch) | |
tree | 7bab4b3dccb859332e3a3fd4e2d9086da8e81116 /tools/testing | |
parent | eb55307e6716b1a02f7db05e27d60e8ca2289c03 (diff) | |
parent | b8c60e8fc6f755c2cdf7164931afdbfa670c6646 (diff) | |
download | linux-c9049984f0e470af865c497c7f785fe895e5da9c.tar.xz |
Merge tag 'nolibc.2023.10.23a' of git://git.kernel.org/pub/scm/linux/kernel/git/paulmck/linux-rcu
Pull nolibc updates from Paul McKenney:
- Add stdarg.h header and a few additional system-call upgrades
- Add support for constructors and destructors
- Add tests to verify the ability to link multiple .o files against
nolibc
- Numerous string-function optimizations and improvements
- Prevent redundant kernel relinks by avoiding embedding of initramfs
into the kernel image
- Allow building i386 with multiarch compiler and make ppc64le use
qemu-system-ppc64
- Miscellaneous fixups, including addition of -nostdinc for
nolibc-test, avoiding -Wstringop-overflow warnings, and avoiding
unused parameter warnings for ENOSYS fallbacks
* tag 'nolibc.2023.10.23a' of git://git.kernel.org/pub/scm/linux/kernel/git/paulmck/linux-rcu:
selftests/nolibc: add tests for multi-object linkage
selftests/nolibc: use qemu-system-ppc64 for ppc64le
tools/nolibc: add support for constructors and destructors
tools/nolibc: drop test for getauxval(AT_PAGESZ)
tools/nolibc: automatically detect necessity to use pselect6
tools/nolibc: don't define new syscall number
tools/nolibc: avoid unused parameter warnings for ENOSYS fallbacks
selftests/nolibc: allow building i386 with multiarch compiler
selftests/nolibc: don't embed initramfs into kernel image
selftests/nolibc: libc-test: avoid -Wstringop-overflow warnings
tools/nolibc: string: Remove the `_nolibc_memcpy_up()` function
tools/nolibc: string: Remove the `_nolibc_memcpy_down()` function
tools/nolibc: x86-64: Use `rep stosb` for `memset()`
tools/nolibc: x86-64: Use `rep movsb` for `memcpy()` and `memmove()`
selftests/nolibc: use -nostdinc for nolibc-test
tools/nolibc: add stdarg.h header
Diffstat (limited to 'tools/testing')
-rw-r--r-- | tools/testing/selftests/nolibc/.gitignore | 1 | ||||
-rw-r--r-- | tools/testing/selftests/nolibc/Makefile | 57 | ||||
-rw-r--r-- | tools/testing/selftests/nolibc/nolibc-test-linkage.c | 26 | ||||
-rw-r--r-- | tools/testing/selftests/nolibc/nolibc-test-linkage.h | 9 | ||||
-rw-r--r-- | tools/testing/selftests/nolibc/nolibc-test.c | 28 |
5 files changed, 94 insertions, 27 deletions
diff --git a/tools/testing/selftests/nolibc/.gitignore b/tools/testing/selftests/nolibc/.gitignore index 52f613cdad54..5119f9f7afd2 100644 --- a/tools/testing/selftests/nolibc/.gitignore +++ b/tools/testing/selftests/nolibc/.gitignore @@ -1,4 +1,5 @@ /initramfs/ +/initramfs.cpio /libc-test /nolibc-test /run.out diff --git a/tools/testing/selftests/nolibc/Makefile b/tools/testing/selftests/nolibc/Makefile index dfe66776a331..a0fc07253baf 100644 --- a/tools/testing/selftests/nolibc/Makefile +++ b/tools/testing/selftests/nolibc/Makefile @@ -82,7 +82,7 @@ QEMU_ARCH_arm = arm QEMU_ARCH_mips = mipsel # works with malta_defconfig QEMU_ARCH_ppc = ppc QEMU_ARCH_ppc64 = ppc64 -QEMU_ARCH_ppc64le = ppc64le +QEMU_ARCH_ppc64le = ppc64 QEMU_ARCH_riscv = riscv64 QEMU_ARCH_s390 = s390x QEMU_ARCH_loongarch = loongarch64 @@ -113,6 +113,7 @@ else Q=@ endif +CFLAGS_i386 = $(call cc-option,-m32) CFLAGS_ppc = -m32 -mbig-endian -mno-vsx $(call cc-option,-mmultiple) CFLAGS_ppc64 = -m64 -mbig-endian -mno-vsx $(call cc-option,-mmultiple) CFLAGS_ppc64le = -m64 -mlittle-endian -mno-vsx $(call cc-option,-mabi=elfv2) @@ -131,18 +132,20 @@ REPORT ?= awk '/\[OK\][\r]*$$/{p++} /\[FAIL\][\r]*$$/{if (!f) printf("\n"); f++ help: @echo "Supported targets under selftests/nolibc:" - @echo " all call the \"run\" target below" - @echo " help this help" - @echo " sysroot create the nolibc sysroot here (uses \$$ARCH)" - @echo " nolibc-test build the executable (uses \$$CC and \$$CROSS_COMPILE)" - @echo " libc-test build an executable using the compiler's default libc instead" - @echo " run-user runs the executable under QEMU (uses \$$XARCH, \$$TEST)" - @echo " initramfs prepare the initramfs with nolibc-test" - @echo " defconfig create a fresh new default config (uses \$$XARCH)" - @echo " kernel (re)build the kernel with the initramfs (uses \$$XARCH)" - @echo " run runs the kernel in QEMU after building it (uses \$$XARCH, \$$TEST)" - @echo " rerun runs a previously prebuilt kernel in QEMU (uses \$$XARCH, \$$TEST)" - @echo " clean clean the sysroot, initramfs, build and output files" + @echo " all call the \"run\" target below" + @echo " help this help" + @echo " sysroot create the nolibc sysroot here (uses \$$ARCH)" + @echo " nolibc-test build the executable (uses \$$CC and \$$CROSS_COMPILE)" + @echo " libc-test build an executable using the compiler's default libc instead" + @echo " run-user runs the executable under QEMU (uses \$$XARCH, \$$TEST)" + @echo " initramfs.cpio prepare the initramfs archive with nolibc-test" + @echo " initramfs prepare the initramfs tree with nolibc-test" + @echo " defconfig create a fresh new default config (uses \$$XARCH)" + @echo " kernel (re)build the kernel (uses \$$XARCH)" + @echo " kernel-standalone (re)build the kernel with the initramfs (uses \$$XARCH)" + @echo " run runs the kernel in QEMU after building it (uses \$$XARCH, \$$TEST)" + @echo " rerun runs a previously prebuilt kernel in QEMU (uses \$$XARCH, \$$TEST)" + @echo " clean clean the sysroot, initramfs, build and output files" @echo "" @echo "The output file is \"run.out\". Test ranges may be passed using \$$TEST." @echo "" @@ -168,17 +171,17 @@ sysroot/$(ARCH)/include: $(Q)mv sysroot/sysroot sysroot/$(ARCH) ifneq ($(NOLIBC_SYSROOT),0) -nolibc-test: nolibc-test.c sysroot/$(ARCH)/include +nolibc-test: nolibc-test.c nolibc-test-linkage.c sysroot/$(ARCH)/include $(QUIET_CC)$(CC) $(CFLAGS) $(LDFLAGS) -o $@ \ - -nostdlib -static -Isysroot/$(ARCH)/include $< -lgcc + -nostdlib -nostdinc -static -Isysroot/$(ARCH)/include nolibc-test.c nolibc-test-linkage.c -lgcc else -nolibc-test: nolibc-test.c +nolibc-test: nolibc-test.c nolibc-test-linkage.c $(QUIET_CC)$(CC) $(CFLAGS) $(LDFLAGS) -o $@ \ - -nostdlib -static -include ../../../include/nolibc/nolibc.h $< -lgcc + -nostdlib -static -include ../../../include/nolibc/nolibc.h nolibc-test.c nolibc-test-linkage.c -lgcc endif -libc-test: nolibc-test.c - $(QUIET_CC)$(HOSTCC) -o $@ $< +libc-test: nolibc-test.c nolibc-test-linkage.c + $(QUIET_CC)$(HOSTCC) -o $@ nolibc-test.c nolibc-test-linkage.c # local libc-test run-libc-test: libc-test @@ -195,6 +198,9 @@ run-user: nolibc-test $(Q)qemu-$(QEMU_ARCH) ./nolibc-test > "$(CURDIR)/run.out" || : $(Q)$(REPORT) $(CURDIR)/run.out +initramfs.cpio: kernel nolibc-test + $(QUIET_GEN)echo 'file /init nolibc-test 755 0 0' | $(srctree)/usr/gen_init_cpio - > initramfs.cpio + initramfs: nolibc-test $(QUIET_MKDIR)mkdir -p initramfs $(call QUIET_INSTALL, initramfs/init) @@ -203,17 +209,20 @@ initramfs: nolibc-test defconfig: $(Q)$(MAKE) -C $(srctree) ARCH=$(ARCH) CC=$(CC) CROSS_COMPILE=$(CROSS_COMPILE) mrproper $(DEFCONFIG) prepare -kernel: initramfs +kernel: + $(Q)$(MAKE) -C $(srctree) ARCH=$(ARCH) CC=$(CC) CROSS_COMPILE=$(CROSS_COMPILE) $(IMAGE_NAME) + +kernel-standalone: initramfs $(Q)$(MAKE) -C $(srctree) ARCH=$(ARCH) CC=$(CC) CROSS_COMPILE=$(CROSS_COMPILE) $(IMAGE_NAME) CONFIG_INITRAMFS_SOURCE=$(CURDIR)/initramfs # run the tests after building the kernel -run: kernel - $(Q)qemu-system-$(QEMU_ARCH) -display none -no-reboot -kernel "$(srctree)/$(IMAGE)" -serial stdio $(QEMU_ARGS) > "$(CURDIR)/run.out" +run: kernel initramfs.cpio + $(Q)qemu-system-$(QEMU_ARCH) -display none -no-reboot -kernel "$(srctree)/$(IMAGE)" -initrd initramfs.cpio -serial stdio $(QEMU_ARGS) > "$(CURDIR)/run.out" $(Q)$(REPORT) $(CURDIR)/run.out # re-run the tests from an existing kernel rerun: - $(Q)qemu-system-$(QEMU_ARCH) -display none -no-reboot -kernel "$(srctree)/$(IMAGE)" -serial stdio $(QEMU_ARGS) > "$(CURDIR)/run.out" + $(Q)qemu-system-$(QEMU_ARCH) -display none -no-reboot -kernel "$(srctree)/$(IMAGE)" -initrd initramfs.cpio -serial stdio $(QEMU_ARGS) > "$(CURDIR)/run.out" $(Q)$(REPORT) $(CURDIR)/run.out # report with existing test log @@ -227,6 +236,8 @@ clean: $(Q)rm -f nolibc-test $(call QUIET_CLEAN, libc-test) $(Q)rm -f libc-test + $(call QUIET_CLEAN, initramfs.cpio) + $(Q)rm -rf initramfs.cpio $(call QUIET_CLEAN, initramfs) $(Q)rm -rf initramfs $(call QUIET_CLEAN, run.out) diff --git a/tools/testing/selftests/nolibc/nolibc-test-linkage.c b/tools/testing/selftests/nolibc/nolibc-test-linkage.c new file mode 100644 index 000000000000..5ff4c8a1db2a --- /dev/null +++ b/tools/testing/selftests/nolibc/nolibc-test-linkage.c @@ -0,0 +1,26 @@ +/* SPDX-License-Identifier: GPL-2.0 */ + +#include "nolibc-test-linkage.h" + +#ifndef NOLIBC +#include <errno.h> +#endif + +void *linkage_test_errno_addr(void) +{ + return &errno; +} + +int linkage_test_constructor_test_value; + +__attribute__((constructor)) +static void constructor1(void) +{ + linkage_test_constructor_test_value = 2; +} + +__attribute__((constructor)) +static void constructor2(void) +{ + linkage_test_constructor_test_value *= 3; +} diff --git a/tools/testing/selftests/nolibc/nolibc-test-linkage.h b/tools/testing/selftests/nolibc/nolibc-test-linkage.h new file mode 100644 index 000000000000..c66473070d73 --- /dev/null +++ b/tools/testing/selftests/nolibc/nolibc-test-linkage.h @@ -0,0 +1,9 @@ +/* SPDX-License-Identifier: GPL-2.0 */ + +#ifndef _NOLIBC_TEST_LINKAGE_H +#define _NOLIBC_TEST_LINKAGE_H + +void *linkage_test_errno_addr(void); +extern int linkage_test_constructor_test_value; + +#endif /* _NOLIBC_TEST_LINKAGE_H */ diff --git a/tools/testing/selftests/nolibc/nolibc-test.c b/tools/testing/selftests/nolibc/nolibc-test.c index fb3bf91462e2..2f10541e6f38 100644 --- a/tools/testing/selftests/nolibc/nolibc-test.c +++ b/tools/testing/selftests/nolibc/nolibc-test.c @@ -41,6 +41,8 @@ #endif #endif +#include "nolibc-test-linkage.h" + /* for the type of int_fast16_t and int_fast32_t, musl differs from glibc and nolibc */ #define SINT_MAX_OF_TYPE(type) (((type)1 << (sizeof(type) * 8 - 2)) - (type)1 + ((type)1 << (sizeof(type) * 8 - 2))) #define SINT_MIN_OF_TYPE(type) (-SINT_MAX_OF_TYPE(type) - 1) @@ -57,6 +59,9 @@ static int test_argc; /* will be used by some test cases as readable file, please don't write it */ static const char *argv0; +/* will be used by constructor tests */ +static int constructor_test_value; + /* definition of a series of tests */ struct test { const char *name; /* test name */ @@ -594,6 +599,19 @@ int expect_strne(const char *expr, int llen, const char *cmp) #define CASE_TEST(name) \ case __LINE__: llen += printf("%d %s", test, #name); +/* constructors validate that they are executed in definition order */ +__attribute__((constructor)) +static void constructor1(void) +{ + constructor_test_value = 1; +} + +__attribute__((constructor)) +static void constructor2(void) +{ + constructor_test_value *= 2; +} + int run_startup(int min, int max) { int test; @@ -630,7 +648,9 @@ int run_startup(int min, int max) CASE_TEST(environ_HOME); EXPECT_PTRNZ(1, getenv("HOME")); break; CASE_TEST(auxv_addr); EXPECT_PTRGT(test_auxv != (void *)-1, test_auxv, brk); break; CASE_TEST(auxv_AT_UID); EXPECT_EQ(1, getauxval(AT_UID), getuid()); break; - CASE_TEST(auxv_AT_PAGESZ); EXPECT_GE(1, getauxval(AT_PAGESZ), 4096); break; + CASE_TEST(constructor); EXPECT_EQ(1, constructor_test_value, 2); break; + CASE_TEST(linkage_errno); EXPECT_PTREQ(1, linkage_test_errno_addr(), &errno); break; + CASE_TEST(linkage_constr); EXPECT_EQ(1, linkage_test_constructor_test_value, 6); break; case __LINE__: return ret; /* must be last */ /* note: do not set any defaults so as to permit holes above */ @@ -894,14 +914,14 @@ int run_syscall(int min, int max) CASE_TEST(lseek_0); EXPECT_SYSER(1, lseek(0, 0, SEEK_SET), -1, ESPIPE); break; CASE_TEST(mkdir_root); EXPECT_SYSER(1, mkdir("/", 0755), -1, EEXIST); break; CASE_TEST(mmap_bad); EXPECT_PTRER(1, mmap(NULL, 0, PROT_READ, MAP_PRIVATE, 0, 0), MAP_FAILED, EINVAL); break; - CASE_TEST(munmap_bad); EXPECT_SYSER(1, munmap((void *)1, 0), -1, EINVAL); break; + CASE_TEST(munmap_bad); EXPECT_SYSER(1, munmap(NULL, 0), -1, EINVAL); break; CASE_TEST(mmap_munmap_good); EXPECT_SYSZR(1, test_mmap_munmap()); break; CASE_TEST(open_tty); EXPECT_SYSNE(1, tmp = open("/dev/null", 0), -1); if (tmp != -1) close(tmp); break; CASE_TEST(open_blah); EXPECT_SYSER(1, tmp = open("/proc/self/blah", 0), -1, ENOENT); if (tmp != -1) close(tmp); break; CASE_TEST(pipe); EXPECT_SYSZR(1, test_pipe()); break; CASE_TEST(poll_null); EXPECT_SYSZR(1, poll(NULL, 0, 0)); break; CASE_TEST(poll_stdout); EXPECT_SYSNE(1, ({ struct pollfd fds = { 1, POLLOUT, 0}; poll(&fds, 1, 0); }), -1); break; - CASE_TEST(poll_fault); EXPECT_SYSER(1, poll((void *)1, 1, 0), -1, EFAULT); break; + CASE_TEST(poll_fault); EXPECT_SYSER(1, poll(NULL, 1, 0), -1, EFAULT); break; CASE_TEST(prctl); EXPECT_SYSER(1, prctl(PR_SET_NAME, (unsigned long)NULL, 0, 0, 0), -1, EFAULT); break; CASE_TEST(read_badf); EXPECT_SYSER(1, read(-1, &tmp, 1), -1, EBADF); break; CASE_TEST(rmdir_blah); EXPECT_SYSER(1, rmdir("/blah"), -1, ENOENT); break; @@ -910,7 +930,7 @@ int run_syscall(int min, int max) CASE_TEST(select_stdout); EXPECT_SYSNE(1, ({ fd_set fds; FD_ZERO(&fds); FD_SET(1, &fds); select(2, NULL, &fds, NULL, NULL); }), -1); break; CASE_TEST(select_fault); EXPECT_SYSER(1, select(1, (void *)1, NULL, NULL, 0), -1, EFAULT); break; CASE_TEST(stat_blah); EXPECT_SYSER(1, stat("/proc/self/blah", &stat_buf), -1, ENOENT); break; - CASE_TEST(stat_fault); EXPECT_SYSER(1, stat((void *)1, &stat_buf), -1, EFAULT); break; + CASE_TEST(stat_fault); EXPECT_SYSER(1, stat(NULL, &stat_buf), -1, EFAULT); break; CASE_TEST(stat_timestamps); EXPECT_SYSZR(1, test_stat_timestamps()); break; CASE_TEST(symlink_root); EXPECT_SYSER(1, symlink("/", "/"), -1, EEXIST); break; CASE_TEST(unlink_root); EXPECT_SYSER(1, unlink("/"), -1, EISDIR); break; |