[PATCH] D19159: [sanitizer] [SystemZ] Implement internal_clone.
Marcin KoĆcielnicki via llvm-commits
llvm-commits at lists.llvm.org
Fri Apr 15 07:05:48 PDT 2016
koriakin created this revision.
koriakin added reviewers: uweigand, samsonov, aizatsky.
koriakin added a subscriber: llvm-commits.
koriakin set the repository for this revision to rL LLVM.
koriakin added a project: Sanitizers.
Repository:
rL LLVM
http://reviews.llvm.org/D19159
Files:
lib/sanitizer_common/sanitizer_linux.cc
lib/sanitizer_common/sanitizer_linux.h
Index: lib/sanitizer_common/sanitizer_linux.h
===================================================================
--- lib/sanitizer_common/sanitizer_linux.h
+++ lib/sanitizer_common/sanitizer_linux.h
@@ -44,7 +44,7 @@
int internal_sigaction_norestorer(int signum, const void *act, void *oldact);
void internal_sigdelset(__sanitizer_sigset_t *set, int signum);
#if defined(__x86_64__) || defined(__mips__) || defined(__aarch64__) \
- || defined(__powerpc64__)
+ || defined(__powerpc64__) || defined(__s390__)
uptr internal_clone(int (*fn)(void *), void *child_stack, int flags, void *arg,
int *parent_tidptr, void *newtls, int *child_tidptr);
#endif
Index: lib/sanitizer_common/sanitizer_linux.cc
===================================================================
--- lib/sanitizer_common/sanitizer_linux.cc
+++ lib/sanitizer_common/sanitizer_linux.cc
@@ -1139,6 +1139,67 @@
"r0", "r29", "r27", "r28");
return res;
}
+#elif defined(__s390__)
+uptr internal_clone(int (*fn)(void *), void *child_stack, int flags, void *arg,
+ int *parent_tidptr, void *newtls, int *child_tidptr) {
+ if (!fn || !child_stack)
+ return -EINVAL;
+ CHECK_EQ(0, (uptr)child_stack % 16);
+ // Minimum frame size.
+#ifdef __s390x__
+ child_stack = (char *)child_stack - 160;
+#else
+ child_stack = (char *)child_stack - 96;
+#endif
+ // Terminate unwind chain.
+ ((unsigned long *)child_stack)[0] = 0;
+ // And pass parameters.
+ ((unsigned long *)child_stack)[1] = (uptr)fn;
+ ((unsigned long *)child_stack)[2] = (uptr)arg;
+ register long res __asm__("r2");
+ register void *__cstack __asm__("r2") = child_stack;
+ register int __flags __asm__("r3") = flags;
+ register int * __ptidptr __asm__("r4") = parent_tidptr;
+ register int * __ctidptr __asm__("r5") = child_tidptr;
+ register void * __newtls __asm__("r6") = newtls;
+
+ __asm__ __volatile__(
+ /* Clone. */
+ "svc %1\n"
+
+ /* if (%r2 != 0)
+ * return;
+ */
+#ifdef __s390x__
+ "cghi %%r2, 0\n"
+#else
+ "chi %%r2, 0\n"
+#endif
+ "jne 1f\n"
+
+ /* Call "fn(arg)". */
+#ifdef __s390x__
+ "lmg %%r1, %%r2, 8(%%r15)\n"
+#else
+ "lm %%r1, %%r2, 4(%%r15)\n"
+#endif
+ "basr %%r14, %%r1\n"
+
+ /* Call _exit(%r2). */
+ "svc %2\n"
+
+ /* Return to parent. */
+ "1:\n"
+ : "=r" (res)
+ : "i"(SYSCALL(clone)), "i"(SYSCALL(exit)),
+ "r"(__cstack),
+ "r"(__flags),
+ "r"(__ptidptr),
+ "r"(__ctidptr),
+ "r"(__newtls)
+ : "memory", "cc");
+ return res;
+}
#endif // defined(__x86_64__) && SANITIZER_LINUX
#if SANITIZER_ANDROID
-------------- next part --------------
A non-text attachment was scrubbed...
Name: D19159.53878.patch
Type: text/x-patch
Size: 3129 bytes
Desc: not available
URL: <http://lists.llvm.org/pipermail/llvm-commits/attachments/20160415/14a8c8f4/attachment.bin>
More information about the llvm-commits
mailing list