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| author | Michael Ellerman <mpe@ellerman.id.au> | 2021-12-21 16:51:01 +0300 |
|---|---|---|
| committer | Michael Ellerman <mpe@ellerman.id.au> | 2021-12-25 02:56:05 +0300 |
| commit | beeac538c366cd2828092adecd1edab28326c55b (patch) | |
| tree | 5218c7df1b57567474c869a66ef36ac20fe1d363 /tools/testing/selftests/powerpc/signal | |
| parent | fd1eaaaaa6864b5fb8f99880fcefb49760b8fe4e (diff) | |
| download | linux-beeac538c366cd2828092adecd1edab28326c55b.tar.xz | |
selftests/powerpc: Add a test of sigreturning to an unaligned address
Add a test of sigreturning to an unaligned address (low two bits set).
This should have no effect because the hardware will mask those bits.
However it previously falsely triggered a warning when
CONFIG_PPC_RFI_SRR_DEBUG=y.
Signed-off-by: Michael Ellerman <mpe@ellerman.id.au>
Link: https://lore.kernel.org/r/20211221135101.2085547-3-mpe@ellerman.id.au
Diffstat (limited to 'tools/testing/selftests/powerpc/signal')
| -rw-r--r-- | tools/testing/selftests/powerpc/signal/.gitignore | 1 | ||||
| -rw-r--r-- | tools/testing/selftests/powerpc/signal/Makefile | 1 | ||||
| -rw-r--r-- | tools/testing/selftests/powerpc/signal/sigreturn_unaligned.c | 43 |
3 files changed, 45 insertions, 0 deletions
diff --git a/tools/testing/selftests/powerpc/signal/.gitignore b/tools/testing/selftests/powerpc/signal/.gitignore index 8f6c816099a4..9d0915777fed 100644 --- a/tools/testing/selftests/powerpc/signal/.gitignore +++ b/tools/testing/selftests/powerpc/signal/.gitignore @@ -5,3 +5,4 @@ sigfuz sigreturn_vdso sig_sc_double_restart sigreturn_kernel +sigreturn_unaligned diff --git a/tools/testing/selftests/powerpc/signal/Makefile b/tools/testing/selftests/powerpc/signal/Makefile index 84e201572466..f679d260afc8 100644 --- a/tools/testing/selftests/powerpc/signal/Makefile +++ b/tools/testing/selftests/powerpc/signal/Makefile @@ -1,6 +1,7 @@ # SPDX-License-Identifier: GPL-2.0 TEST_GEN_PROGS := signal signal_tm sigfuz sigreturn_vdso sig_sc_double_restart TEST_GEN_PROGS += sigreturn_kernel +TEST_GEN_PROGS += sigreturn_unaligned CFLAGS += -maltivec $(OUTPUT)/signal_tm: CFLAGS += -mhtm diff --git a/tools/testing/selftests/powerpc/signal/sigreturn_unaligned.c b/tools/testing/selftests/powerpc/signal/sigreturn_unaligned.c new file mode 100644 index 000000000000..6e58ee4f0fdf --- /dev/null +++ b/tools/testing/selftests/powerpc/signal/sigreturn_unaligned.c @@ -0,0 +1,43 @@ +// SPDX-License-Identifier: GPL-2.0 +/* + * Test sigreturn to an unaligned address, ie. low 2 bits set. + * Nothing bad should happen. + * This was able to trigger warnings with CONFIG_PPC_RFI_SRR_DEBUG=y. + */ + +#include <signal.h> +#include <stdio.h> +#include <stdlib.h> +#include <string.h> +#include <ucontext.h> +#include <unistd.h> + +#include "utils.h" + + +static void sigusr1_handler(int signo, siginfo_t *info, void *ptr) +{ + ucontext_t *uc = ptr; + + UCONTEXT_NIA(uc) |= 3; +} + +static int test_sigreturn_unaligned(void) +{ + struct sigaction action; + + memset(&action, 0, sizeof(action)); + action.sa_sigaction = sigusr1_handler; + action.sa_flags = SA_SIGINFO; + + FAIL_IF(sigaction(SIGUSR1, &action, NULL) == -1); + + raise(SIGUSR1); + + return 0; +} + +int main(void) +{ + return test_harness(test_sigreturn_unaligned, "sigreturn_unaligned"); +} |