fix: kallsyms wrapper on ppc64el

[lttng-modules.git] / wrapper / kallsyms.h

diff --git a/wrapper/kallsyms.h b/wrapper/kallsyms.h
index e60fe363818243d78885aa15961256d66f3ec4ec..2e5f123c1ef6147fcc2fe8ecbad959ea19407a6c 100644 (file)
--- a/wrapper/kallsyms.h
+++ b/wrapper/kallsyms.h
@@ -14,23 +14,46 @@
 #define _LTTNG_WRAPPER_KALLSYMS_H
 
 #include <linux/kallsyms.h>
+#include <lttng-kernel-version.h>
+
+/* CONFIG_PPC64_ELF_ABI_V1/V2 were introduced in v5.19 */
+#if defined(CONFIG_PPC64_ELF_ABI_V2) || (defined(CONFIG_PPC64) && defined(CONFIG_CPU_LITTLE_ENDIAN))
+#define LTTNG_CONFIG_PPC64_ELF_ABI_V2
+#endif
+#if defined(CONFIG_PPC64_ELF_ABI_V1) || (defined(CONFIG_PPC64) && defined(CONFIG_CPU_BIG_ENDIAN))
+#define LTTNG_CONFIG_PPC64_ELF_ABI_V1
+#endif
 
 /*
  * 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)
+#ifdef LTTNG_CONFIG_PPC64_ELF_ABI_V1
 # ifndef CONFIG_KALLSYMS_ALL
 #  error "LTTng-modules requires CONFIG_KALLSYMS_ALL on PowerPC ABIv1"
 # endif
 #endif
 
+#if (LTTNG_LINUX_VERSION_CODE >= LTTNG_KERNEL_VERSION(5,7,0))
+
+unsigned long wrapper_kallsyms_lookup_name(const char *name);
+
+#else /* #if (LTTNG_LINUX_VERSION_CODE >= LTTNG_KERNEL_VERSION(5,7,0)) */
+
+static inline
+unsigned long wrapper_kallsyms_lookup_name(const char *name)
+{
+       return kallsyms_lookup_name(name);
+}
+
+#endif /* #else #if (LTTNG_LINUX_VERSION_CODE >= LTTNG_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)
@@ -43,6 +66,7 @@ unsigned long kallsyms_lookup_funcptr(const char *name)
 static inline
 unsigned long kallsyms_lookup_dataptr(const char *name)
 {
-       return kallsyms_lookup_name(name);
+       return wrapper_kallsyms_lookup_name(name);
 }
+
 #endif /* _LTTNG_WRAPPER_KALLSYMS_H */