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| author | Alexey Dobriyan <adobriyan@gmail.com> | 2023-06-30 21:34:33 +0300 |
|---|---|---|
| committer | Andrew Morton <akpm@linux-foundation.org> | 2023-08-18 10:18:49 -0700 |
| commit | 4356b11ec0fffaa24331ad762e57547537ff3482 (patch) | |
| tree | aa3efd7b8ea4cee145f66f06226ff8785f8855cd | |
| parent | 4099451ac24c4e44f54a112d783752fd192d0c26 (diff) | |
| download | linux-stable-4356b11ec0fffaa24331ad762e57547537ff3482.tar.gz linux-stable-4356b11ec0fffaa24331ad762e57547537ff3482.tar.bz2 linux-stable-4356b11ec0fffaa24331ad762e57547537ff3482.zip | |
proc: support proc-empty-vm test on i386
Unmap everything starting from 4GB length until it unmaps, otherwise test
has to detect which virtual memory split kernel is using.
Link: https://lkml.kernel.org/r/20230630183434.17434-1-adobriyan@gmail.com
Signed-off-by: Alexey Dobriyan <adobriyan@gmail.com>
Cc: Björn Töpel <bjorn@kernel.org>
Signed-off-by: Andrew Morton <akpm@linux-foundation.org>
| -rw-r--r-- | tools/testing/selftests/proc/proc-empty-vm.c | 16 |
1 files changed, 16 insertions, 0 deletions
diff --git a/tools/testing/selftests/proc/proc-empty-vm.c b/tools/testing/selftests/proc/proc-empty-vm.c index 7588428b8fcd..3aea36c57800 100644 --- a/tools/testing/selftests/proc/proc-empty-vm.c +++ b/tools/testing/selftests/proc/proc-empty-vm.c @@ -37,6 +37,10 @@ #include <sys/wait.h> #include <unistd.h> +#ifdef __amd64__ +#define TEST_VSYSCALL +#endif + /* * 0: vsyscall VMA doesn't exist vsyscall=none * 1: vsyscall VMA is --xp vsyscall=xonly @@ -119,6 +123,7 @@ static void sigaction_SIGSEGV(int _, siginfo_t *__, void *___) _exit(EXIT_FAILURE); } +#ifdef TEST_VSYSCALL static void sigaction_SIGSEGV_vsyscall(int _, siginfo_t *__, void *___) { _exit(g_vsyscall); @@ -170,6 +175,7 @@ static void vsyscall(void) exit(1); } } +#endif static int test_proc_pid_maps(pid_t pid) { @@ -299,7 +305,9 @@ int main(void) { int rv = EXIT_SUCCESS; +#ifdef TEST_VSYSCALL vsyscall(); +#endif switch (g_vsyscall) { case 0: @@ -346,6 +354,14 @@ int main(void) #ifdef __amd64__ munmap(NULL, ((size_t)1 << 47) - 4096); +#elif defined __i386__ + { + size_t len; + + for (len = -4096;; len -= 4096) { + munmap(NULL, len); + } + } #else #error "implement 'unmap everything'" #endif |