From: Dmitry V. Levin <ldv@altlinux.org>
Date: Fri, 23 Dec 2016 18:44:37 +0000 (+0000)
Subject: tests: add F8ILL_KULONG_* and f8ill_ptr_to_kulong to tests.h
X-Git-Tag: v4.16~198
X-Git-Url: https://granicus.if.org/sourcecode?a=commitdiff_plain;h=bd43e0954b15ff1d904749dbc9f4ee52b56f60d8;p=strace

tests: add F8ILL_KULONG_* and f8ill_ptr_to_kulong to tests.h

* tests/tests.h (F8ILL_KULONG_SUPPORTED, F8ILL_KULONG_MASK): New macros.
(f8ill_ptr_to_kulong): New static inline function.
---

diff --git a/tests/tests.h b/tests/tests.h
index 1724124b..202b2224 100644
--- a/tests/tests.h
+++ b/tests/tests.h
@@ -141,6 +141,22 @@ int send_mmsg(int, struct mmsghdr *, unsigned int, unsigned int);
 /* Create a pipe with maximized descriptor numbers. */
 void pipe_maxfd(int pipefd[2]);
 
+#define F8ILL_KULONG_SUPPORTED	(sizeof(void *) < sizeof(kernel_ulong_t))
+#define F8ILL_KULONG_MASK	((kernel_ulong_t) 0xffffffff00000000ULL)
+
+/*
+ * For 64-bit kernel_ulong_t and 32-bit pointer,
+ * return a kernel_ulong_t value by filling higher bits.
+ * For other architertures, return the original pointer.
+ */
+static inline kernel_ulong_t
+f8ill_ptr_to_kulong(const void *const ptr)
+{
+	const unsigned long uptr = (unsigned long) ptr;
+	return F8ILL_KULONG_SUPPORTED
+	       ? F8ILL_KULONG_MASK | uptr : (kernel_ulong_t) uptr;
+}
+
 # define ARRAY_SIZE(arg) ((unsigned int) (sizeof(arg) / sizeof((arg)[0])))
 # define LENGTH_OF(arg) ((unsigned int) sizeof(arg) - 1)