From: linux at dominikbrodowski.net (Dominik Brodowski) Subject: [Linux-kselftest-mirror] [PATCH 4/5] selftests/x86: do not rely on int $0x80 in single_step_syscall.c Date: Sun, 11 Feb 2018 12:10:12 +0100 [thread overview] Message-ID: <20180211111013.16888-5-linux@dominikbrodowski.net> (raw) In-Reply-To: <20180211111013.16888-1-linux@dominikbrodowski.net> On 64bit builds, we should not rely on int $0x80 working (it only does if CONFIG_IA32_EMULATION is enabled). To keep the "Set TF and check int80" test running on 64bit installs with CONFIG_IA32_EMULATION enabled, build this test only if we can also build 32bit binaries (which should be a good approximation for that). CC: Dmitry Safonov <dsafonov at virtuozzo.com> CC: Andy Lutomirski <luto at kernel.org> Signed-off-by: Dominik Brodowski <linux at dominikbrodowski.net> --- tools/testing/selftests/x86/Makefile | 2 ++ tools/testing/selftests/x86/single_step_syscall.c | 5 ++++- 2 files changed, 6 insertions(+), 1 deletion(-) diff --git a/tools/testing/selftests/x86/Makefile b/tools/testing/selftests/x86/Makefile index ce2615a2d105..371ae715c506 100644 --- a/tools/testing/selftests/x86/Makefile +++ b/tools/testing/selftests/x86/Makefile @@ -40,12 +40,14 @@ endef ifeq ($(CAN_BUILD_I386),1) all: all_32 TEST_PROGS += $(BINARIES_32) +EXTRA_CFLAGS += -DCAN_BUILD_32 $(foreach t,$(TARGETS_C_32BIT_ALL),$(eval $(call gen-target-rule-32,$(t)))) endif ifeq ($(CAN_BUILD_X86_64),1) all: all_64 TEST_PROGS += $(BINARIES_64) +EXTRA_CFLAGS += -DCAN_BUILD_64 $(foreach t,$(TARGETS_C_64BIT_ALL),$(eval $(call gen-target-rule-64,$(t)))) endif diff --git a/tools/testing/selftests/x86/single_step_syscall.c b/tools/testing/selftests/x86/single_step_syscall.c index a48da95c18fd..ddfdd635de16 100644 --- a/tools/testing/selftests/x86/single_step_syscall.c +++ b/tools/testing/selftests/x86/single_step_syscall.c @@ -119,7 +119,9 @@ static void check_result(void) int main() { +#ifdef CAN_BUILD_32 int tmp; +#endif sethandler(SIGTRAP, sigtrap, 0); @@ -139,12 +141,13 @@ int main() : : "c" (post_nop) : "r11"); check_result(); #endif - +#ifdef CAN_BUILD_32 printf("[RUN]\tSet TF and check int80\n"); set_eflags(get_eflags() | X86_EFLAGS_TF); asm volatile ("int $0x80" : "=a" (tmp) : "a" (SYS_getpid) : INT80_CLOBBERS); check_result(); +#endif /* * This test is particularly interesting if fast syscalls use -- 2.16.1 -- To unsubscribe from this list: send the line "unsubscribe linux-kselftest" in the body of a message to majordomo at vger.kernel.org More majordomo info at http://vger.kernel.org/majordomo-info.html
WARNING: multiple messages have this Message-ID (diff)
From: linux@dominikbrodowski.net (Dominik Brodowski) Subject: [Linux-kselftest-mirror] [PATCH 4/5] selftests/x86: do not rely on int $0x80 in single_step_syscall.c Date: Sun, 11 Feb 2018 12:10:12 +0100 [thread overview] Message-ID: <20180211111013.16888-5-linux@dominikbrodowski.net> (raw) Message-ID: <20180211111012.3-dbuY5bMC7SV3JzQa59T9GIpZ-ih3Kx_wIyCW8rQXY@z> (raw) In-Reply-To: <20180211111013.16888-1-linux@dominikbrodowski.net> On 64bit builds, we should not rely on int $0x80 working (it only does if CONFIG_IA32_EMULATION is enabled). To keep the "Set TF and check int80" test running on 64bit installs with CONFIG_IA32_EMULATION enabled, build this test only if we can also build 32bit binaries (which should be a good approximation for that). CC: Dmitry Safonov <dsafonov at virtuozzo.com> CC: Andy Lutomirski <luto at kernel.org> Signed-off-by: Dominik Brodowski <linux at dominikbrodowski.net> --- tools/testing/selftests/x86/Makefile | 2 ++ tools/testing/selftests/x86/single_step_syscall.c | 5 ++++- 2 files changed, 6 insertions(+), 1 deletion(-) diff --git a/tools/testing/selftests/x86/Makefile b/tools/testing/selftests/x86/Makefile index ce2615a2d105..371ae715c506 100644 --- a/tools/testing/selftests/x86/Makefile +++ b/tools/testing/selftests/x86/Makefile @@ -40,12 +40,14 @@ endef ifeq ($(CAN_BUILD_I386),1) all: all_32 TEST_PROGS += $(BINARIES_32) +EXTRA_CFLAGS += -DCAN_BUILD_32 $(foreach t,$(TARGETS_C_32BIT_ALL),$(eval $(call gen-target-rule-32,$(t)))) endif ifeq ($(CAN_BUILD_X86_64),1) all: all_64 TEST_PROGS += $(BINARIES_64) +EXTRA_CFLAGS += -DCAN_BUILD_64 $(foreach t,$(TARGETS_C_64BIT_ALL),$(eval $(call gen-target-rule-64,$(t)))) endif diff --git a/tools/testing/selftests/x86/single_step_syscall.c b/tools/testing/selftests/x86/single_step_syscall.c index a48da95c18fd..ddfdd635de16 100644 --- a/tools/testing/selftests/x86/single_step_syscall.c +++ b/tools/testing/selftests/x86/single_step_syscall.c @@ -119,7 +119,9 @@ static void check_result(void) int main() { +#ifdef CAN_BUILD_32 int tmp; +#endif sethandler(SIGTRAP, sigtrap, 0); @@ -139,12 +141,13 @@ int main() : : "c" (post_nop) : "r11"); check_result(); #endif - +#ifdef CAN_BUILD_32 printf("[RUN]\tSet TF and check int80\n"); set_eflags(get_eflags() | X86_EFLAGS_TF); asm volatile ("int $0x80" : "=a" (tmp) : "a" (SYS_getpid) : INT80_CLOBBERS); check_result(); +#endif /* * This test is particularly interesting if fast syscalls use -- 2.16.1 -- To unsubscribe from this list: send the line "unsubscribe linux-kselftest" in the body of a message to majordomo at vger.kernel.org More majordomo info at http://vger.kernel.org/majordomo-info.html
next prev parent reply other threads:[~2018-02-11 11:10 UTC|newest] Thread overview: 24+ messages / expand[flat|nested] mbox.gz Atom feed top 2018-02-11 11:10 [Linux-kselftest-mirror] [PATCH 0/5] selftests/x86: fixes for !CONFIG_IA32_EMULATION and vsyscall=none linux 2018-02-11 11:10 ` Dominik Brodowski 2018-02-11 11:10 ` [Linux-kselftest-mirror] [PATCH 1/5] selftests/x86: 5lvl test has been moved linux 2018-02-11 11:10 ` Dominik Brodowski 2018-02-11 11:10 ` [Linux-kselftest-mirror] [PATCH 2/5] selftests/x86: fix vDSO selftest segfault for vsyscall=none linux 2018-02-11 11:10 ` Dominik Brodowski 2018-02-11 11:21 ` mingo 2018-02-11 11:21 ` Ingo Molnar 2018-02-11 12:17 ` linux 2018-02-11 12:17 ` Dominik Brodowski 2018-02-11 13:00 ` linux 2018-02-11 13:00 ` Dominik Brodowski 2018-02-11 18:24 ` mingo 2018-02-11 18:24 ` Ingo Molnar 2018-02-11 20:59 ` [Linux-kselftest-mirror] [PATCH] selftests/x86: clarify that there is no buffer overflow on sscanf usage linux 2018-02-11 20:59 ` Dominik Brodowski 2018-02-12 17:58 ` shuah 2018-02-12 17:58 ` Shuah Khan 2018-02-11 11:10 ` [Linux-kselftest-mirror] [PATCH 3/5] selftests/x86: do not rely on int $0x80 in test_mremap_vdso.c linux 2018-02-11 11:10 ` Dominik Brodowski 2018-02-11 11:10 ` linux [this message] 2018-02-11 11:10 ` [Linux-kselftest-mirror] [PATCH 4/5] selftests/x86: do not rely on int $0x80 in single_step_syscall.c Dominik Brodowski 2018-02-11 11:10 ` [Linux-kselftest-mirror] [PATCH 5/5] selftests/x86: disable tests requiring 32bit support on pure 64bit systems linux 2018-02-11 11:10 ` Dominik Brodowski
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