Signed-off-by: Cyril Bur <cyril...@gmail.com> --- tools/testing/selftests/powerpc/syscalls/Makefile | 3 +- .../testing/selftests/powerpc/syscalls/spr_exec.c | 78 ++++++++++++++++++++++ 2 files changed, 80 insertions(+), 1 deletion(-) create mode 100644 tools/testing/selftests/powerpc/syscalls/spr_exec.c
diff --git a/tools/testing/selftests/powerpc/syscalls/Makefile b/tools/testing/selftests/powerpc/syscalls/Makefile index b35c794..291ba45 100644 --- a/tools/testing/selftests/powerpc/syscalls/Makefile +++ b/tools/testing/selftests/powerpc/syscalls/Makefile @@ -1,10 +1,11 @@ -TEST_PROGS := ipc_unmuxed +TEST_PROGS := ipc_unmuxed spr_exec CFLAGS += -I../../../../../usr/include all: $(TEST_PROGS) $(TEST_PROGS): ../harness.c +spr_exec: ../utils.c include ../../lib.mk diff --git a/tools/testing/selftests/powerpc/syscalls/spr_exec.c b/tools/testing/selftests/powerpc/syscalls/spr_exec.c new file mode 100644 index 0000000..5ecd6ca --- /dev/null +++ b/tools/testing/selftests/powerpc/syscalls/spr_exec.c @@ -0,0 +1,78 @@ +/* + * Copyright 2016, Cyril Bur, IBM Corp. + * + * This program is free software; you can redistribute it and/or + * modify it under the terms of the GNU General Public License + * as published by the Free Software Foundation; either version + * 2 of the License, or (at your option) any later version. + * + * This test checks that the TAR (an SPR) is correctly sanitised across + * execve() + */ +#include <asm/cputable.h> +#include <stdlib.h> +#include <stdio.h> +#include <sys/auxv.h> +#include <unistd.h> + +#include "utils.h" + +static char *name; +static int count; + +static int exec_spr(void) +{ + unsigned long tar; + char buffer[10]; + char *args[3]; + + asm __volatile__( + "mfspr %[tar], 815" + : [tar] "=r" (tar) + ); + /* Read TAR */ + FAIL_IF(tar != 0); + + tar = 1; + asm __volatile__( + "mtspr 815, %[tar]" + : + : [tar] "r" (tar) + ); + + FAIL_IF(sprintf(buffer, "%d", count + 1) == -1); + args[0] = name; + args[1] = buffer; + args[2] = NULL; + FAIL_IF(execve(name, args, NULL) == -1); + + return 0; +} + +static int exec_spr_check(void) +{ + unsigned long tar; + + asm __volatile__( + "mfspr %[tar], 815;" + : [tar] "=r" (tar) + ); + /* Read TAR */ + FAIL_IF(tar != 0); + + return 0; +} + +int main(int argc, char *argv[]) +{ + SKIP_IF(!have_hwcap2(PPC_FEATURE2_TAR)); + name = argv[0]; + /* Do this a few times to be sure isn't a false negative */ + if (argc == 1 || atoi(argv[1]) < 10) { + if (argc > 1) + count = atoi(argv[1]); + return test_harness(exec_spr, "spr_exec"); + } else { + return test_harness(exec_spr_check, "spr_exec_check"); + } +} -- 2.7.4 _______________________________________________ Linuxppc-dev mailing list Linuxppc-dev@lists.ozlabs.org https://lists.ozlabs.org/listinfo/linuxppc-dev