68abc16af7
Upstream commit: 71fcdba577884627c3ee4e43beb915da752efb1f - linux: Use rseq area unconditionally in sched_getcpu (bug 31479) - Use gcc __builtin_stdc_* builtins in stdbit.h if possible - S390: Do not clobber r7 in clone [BZ #31402] - math: Update mips64 ulps - mips: FIx clone3 implementation (BZ 31325) - arm: Remove wrong ldr from _dl_start_user (BZ 31339) - Replace advisories directory
144 lines
3.9 KiB
Diff
144 lines
3.9 KiB
Diff
commit e0910f1d3278f05439fb434ee528fc9be1b6bd5e
|
|
Author: Stefan Liebler <stli@linux.ibm.com>
|
|
Date: Thu Feb 22 15:03:27 2024 +0100
|
|
|
|
S390: Do not clobber r7 in clone [BZ #31402]
|
|
|
|
Starting with commit e57d8fc97b90127de4ed3e3a9cdf663667580935
|
|
"S390: Always use svc 0"
|
|
clone clobbers the call-saved register r7 in error case:
|
|
function or stack is NULL.
|
|
|
|
This patch restores the saved registers also in the error case.
|
|
Furthermore the existing test misc/tst-clone is extended to check
|
|
all error cases and that clone does not clobber registers in this
|
|
error case.
|
|
|
|
(cherry picked from commit 02782fd12849b6673cb5c2728cb750e8ec295aa3)
|
|
|
|
diff --git a/sysdeps/unix/sysv/linux/s390/s390-32/clone.S b/sysdeps/unix/sysv/linux/s390/s390-32/clone.S
|
|
index 4c882ef2ee3f5b81..a7a863242c4ebd84 100644
|
|
--- a/sysdeps/unix/sysv/linux/s390/s390-32/clone.S
|
|
+++ b/sysdeps/unix/sysv/linux/s390/s390-32/clone.S
|
|
@@ -53,6 +53,7 @@ ENTRY(__clone)
|
|
br %r14
|
|
error:
|
|
lhi %r2,-EINVAL
|
|
+ lm %r6,%r7,24(%r15) /* Load registers. */
|
|
j SYSCALL_ERROR_LABEL
|
|
PSEUDO_END (__clone)
|
|
|
|
diff --git a/sysdeps/unix/sysv/linux/s390/s390-64/clone.S b/sysdeps/unix/sysv/linux/s390/s390-64/clone.S
|
|
index 4eb104be71ee565a..c552a6b8decb63de 100644
|
|
--- a/sysdeps/unix/sysv/linux/s390/s390-64/clone.S
|
|
+++ b/sysdeps/unix/sysv/linux/s390/s390-64/clone.S
|
|
@@ -54,6 +54,7 @@ ENTRY(__clone)
|
|
br %r14
|
|
error:
|
|
lghi %r2,-EINVAL
|
|
+ lmg %r6,%r7,48(%r15) /* Restore registers. */
|
|
jg SYSCALL_ERROR_LABEL
|
|
PSEUDO_END (__clone)
|
|
|
|
diff --git a/sysdeps/unix/sysv/linux/tst-clone.c b/sysdeps/unix/sysv/linux/tst-clone.c
|
|
index 470676ab2bb3fc31..2bc71249837fbb66 100644
|
|
--- a/sysdeps/unix/sysv/linux/tst-clone.c
|
|
+++ b/sysdeps/unix/sysv/linux/tst-clone.c
|
|
@@ -16,12 +16,16 @@
|
|
License along with the GNU C Library; if not, see
|
|
<https://www.gnu.org/licenses/>. */
|
|
|
|
-/* BZ #2386 */
|
|
+/* BZ #2386, BZ #31402 */
|
|
#include <errno.h>
|
|
#include <stdio.h>
|
|
#include <stdlib.h>
|
|
#include <unistd.h>
|
|
#include <sched.h>
|
|
+#include <stackinfo.h> /* For _STACK_GROWS_{UP,DOWN}. */
|
|
+#include <support/check.h>
|
|
+
|
|
+volatile unsigned v = 0xdeadbeef;
|
|
|
|
int child_fn(void *arg)
|
|
{
|
|
@@ -30,22 +34,67 @@ int child_fn(void *arg)
|
|
}
|
|
|
|
static int
|
|
-do_test (void)
|
|
+__attribute__((noinline))
|
|
+do_clone (int (*fn)(void *), void *stack)
|
|
{
|
|
int result;
|
|
+ unsigned int a = v;
|
|
+ unsigned int b = v;
|
|
+ unsigned int c = v;
|
|
+ unsigned int d = v;
|
|
+ unsigned int e = v;
|
|
+ unsigned int f = v;
|
|
+ unsigned int g = v;
|
|
+ unsigned int h = v;
|
|
+ unsigned int i = v;
|
|
+ unsigned int j = v;
|
|
+ unsigned int k = v;
|
|
+ unsigned int l = v;
|
|
+ unsigned int m = v;
|
|
+ unsigned int n = v;
|
|
+ unsigned int o = v;
|
|
+
|
|
+ result = clone (fn, stack, 0, NULL);
|
|
+
|
|
+ /* Check that clone does not clobber call-saved registers. */
|
|
+ TEST_VERIFY (a == v && b == v && c == v && d == v && e == v && f == v
|
|
+ && g == v && h == v && i == v && j == v && k == v && l == v
|
|
+ && m == v && n == v && o == v);
|
|
+
|
|
+ return result;
|
|
+}
|
|
+
|
|
+static void
|
|
+__attribute__((noinline))
|
|
+do_test_single (int (*fn)(void *), void *stack)
|
|
+{
|
|
+ printf ("%s (fn=%p, stack=%p)\n", __FUNCTION__, fn, stack);
|
|
+ errno = 0;
|
|
+
|
|
+ int result = do_clone (fn, stack);
|
|
+
|
|
+ TEST_COMPARE (errno, EINVAL);
|
|
+ TEST_COMPARE (result, -1);
|
|
+}
|
|
|
|
- result = clone (child_fn, NULL, 0, NULL);
|
|
+static int
|
|
+do_test (void)
|
|
+{
|
|
+ char st[128 * 1024] __attribute__ ((aligned));
|
|
+ void *stack = NULL;
|
|
+#if _STACK_GROWS_DOWN
|
|
+ stack = st + sizeof (st);
|
|
+#elif _STACK_GROWS_UP
|
|
+ stack = st;
|
|
+#else
|
|
+# error "Define either _STACK_GROWS_DOWN or _STACK_GROWS_UP"
|
|
+#endif
|
|
|
|
- if (errno != EINVAL || result != -1)
|
|
- {
|
|
- printf ("FAIL: clone()=%d (wanted -1) errno=%d (wanted %d)\n",
|
|
- result, errno, EINVAL);
|
|
- return 1;
|
|
- }
|
|
+ do_test_single (child_fn, NULL);
|
|
+ do_test_single (NULL, stack);
|
|
+ do_test_single (NULL, NULL);
|
|
|
|
- puts ("All OK");
|
|
return 0;
|
|
}
|
|
|
|
-#define TEST_FUNCTION do_test ()
|
|
-#include "../test-skeleton.c"
|
|
+#include <support/test-driver.c>
|