Messages in this thread Patch in this message | | | From | Masami Hiramatsu <> | Subject | [BUGFIX PATCH 1/5] selftests: proc: Make va_max 3GB on 32bit arch | Date | Tue, 8 Oct 2019 00:10:26 +0900 |
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Currently proc-self-map-files-002.c sets va_max (max test address of user virtual address) to 4GB, but it is too big for 32bit arch and 1UL << 32 is overflow on 32bit long.
Make va_max 3GB on 32bit arch like i386 and arm.
Signed-off-by: Masami Hiramatsu <mhiramat@kernel.org> Cc: Alexey Dobriyan <adobriyan@gmail.com> --- .../selftests/proc/proc-self-map-files-002.c | 11 ++++++++++- 1 file changed, 10 insertions(+), 1 deletion(-)
diff --git a/tools/testing/selftests/proc/proc-self-map-files-002.c b/tools/testing/selftests/proc/proc-self-map-files-002.c index 47b7473dedef..d517f8c479fb 100644 --- a/tools/testing/selftests/proc/proc-self-map-files-002.c +++ b/tools/testing/selftests/proc/proc-self-map-files-002.c @@ -22,6 +22,7 @@ #include <unistd.h> #include <sys/mman.h> #include <stdlib.h> +#include <asm/bitsperlong.h> static void pass(const char *fmt, unsigned long a, unsigned long b) { @@ -44,10 +45,18 @@ static void fail(const char *fmt, unsigned long a, unsigned long b) exit(1); } +#if __BITS_PER_LONG == 32 +# define VA_MAX (3UL << 30) +#elif __BITS_PER_LONG == 64 +# define VA_MAX (1UL << 32) +#else +# define VA_MAX 0 +#endif + int main(void) { const int PAGE_SIZE = sysconf(_SC_PAGESIZE); - const unsigned long va_max = 1UL << 32; + const unsigned long va_max = VA_MAX; unsigned long va; void *p; int fd;
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