X-Git-Url: http://git.lttng.org/?a=blobdiff_plain;f=wrapper%2Fkallsyms.h;h=7f4d8300c53eb591bd7e55b84529bd2ab634e288;hb=7c6d929d62a6e24fb1dbeaee5cd2c8afe77720b7;hp=f07788a04913ae2219a30edfb5102ac29f12e9ab;hpb=886d51a3d7ed5fa6b41d7f19b3e14ae6c535a44c;p=lttng-modules.git

diff --git a/wrapper/kallsyms.h b/wrapper/kallsyms.h
index f07788a0..7f4d8300 100644
--- a/wrapper/kallsyms.h
+++ b/wrapper/kallsyms.h
@@ -1,7 +1,5 @@
-#ifndef _LTTNG_WRAPPER_KALLSYMS_H
-#define _LTTNG_WRAPPER_KALLSYMS_H
-
-/*
+/* SPDX-License-Identifier: (GPL-2.0-only or LGPL-2.1-only)
+ *
  * wrapper/kallsyms.h
  *
  * wrapper around kallsyms_lookup_name. Implements arch-dependent code for
@@ -10,30 +8,44 @@
  *
  * Copyright (C) 2011 Avik Sil (avik.sil@linaro.org)
  * Copyright (C) 2011-2012 Mathieu Desnoyers <mathieu.desnoyers@efficios.com>
- *
- * This library is free software; you can redistribute it and/or
- * modify it under the terms of the GNU Lesser General Public
- * License as published by the Free Software Foundation; only
- * version 2.1 of the License.
- *
- * This library is distributed in the hope that it will be useful,
- * but WITHOUT ANY WARRANTY; without even the implied warranty of
- * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
- * Lesser General Public License for more details.
- *
- * You should have received a copy of the GNU Lesser General Public
- * License along with this library; if not, write to the Free Software
- * Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301 USA
  */
 
+#ifndef _LTTNG_WRAPPER_KALLSYMS_H
+#define _LTTNG_WRAPPER_KALLSYMS_H
+
 #include <linux/kallsyms.h>
+#include <linux/version.h>
+
+/*
+ * PowerPC ABIv1 needs KALLSYMS_ALL to get the function descriptor,
+ * which is needed to perform the function call.
+ */
+#if defined(CONFIG_PPC64) && (!defined(_CALL_ELF) || _CALL_ELF < 2)
+# ifndef CONFIG_KALLSYMS_ALL
+#  error "LTTng-modules requires CONFIG_KALLSYMS_ALL on PowerPC ABIv1"
+# endif
+#endif
+
+#if (LINUX_VERSION_CODE >= KERNEL_VERSION(5,7,0))
+
+unsigned long wrapper_kallsyms_lookup_name(const char *name);
+
+#else /* #if (LINUX_VERSION_CODE >= KERNEL_VERSION(5,7,0)) */
+
+static inline
+unsigned long wrapper_kallsyms_lookup_name(const char *name)
+{
+	return kallsyms_lookup_name(name);
+}
+
+#endif /* #else #if (LINUX_VERSION_CODE >= KERNEL_VERSION(5,7,0)) */
 
 static inline
 unsigned long kallsyms_lookup_funcptr(const char *name)
 {
 	unsigned long addr;
 
-	addr = kallsyms_lookup_name(name);
+	addr = wrapper_kallsyms_lookup_name(name);
 #ifdef CONFIG_ARM
 #ifdef CONFIG_THUMB2_KERNEL
 	if (addr)
@@ -42,4 +54,11 @@ unsigned long kallsyms_lookup_funcptr(const char *name)
 #endif
 	return addr;
 }
+
+static inline
+unsigned long kallsyms_lookup_dataptr(const char *name)
+{
+	return wrapper_kallsyms_lookup_name(name);
+}
+
 #endif /* _LTTNG_WRAPPER_KALLSYMS_H */