Cleanup: Move all source files to src/

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

diff --git a/wrapper/kallsyms.c b/wrapper/kallsyms.c
deleted file mode 100644 (file)
index 6af77f5..0000000
--- a/wrapper/kallsyms.c
+++ /dev/null
@@ -1,70 +0,0 @@
-/* SPDX-License-Identifier: (GPL-2.0-only OR LGPL-2.1-only)
- *
- * wrapper/kallsyms.c
- *
- * Wrapper around kallsyms. Using kprobes to get its address when available.
- *
- * Can we mainline LTTng already so we don't have to waste our time doing this
- * kind of hack ?
- *
- * Copyright (C) 2020 Mathieu Desnoyers <mathieu.desnoyers@efficios.com>
- */
-
-#include <linux/kprobes.h>
-#include <linux/module.h>
-#include <wrapper/kallsyms.h>
-
-#if (LINUX_VERSION_CODE >= KERNEL_VERSION(5,7,0))
-
-#ifndef CONFIG_KPROBES
-# error "LTTng-modules requires CONFIG_KPROBES on kernels >= 5.7.0"
-#endif
-
-static
-unsigned long (*kallsyms_lookup_name_sym)(const char *name);
-
-static
-int dummy_kprobe_handler(struct kprobe *p, struct pt_regs *regs)
-{
-       return 0;
-}
-
-static
-unsigned long do_get_kallsyms(void)
-{
-       struct kprobe probe;
-       int ret;
-       unsigned long addr;
-
-       memset(&probe, 0, sizeof(probe));
-       probe.pre_handler = dummy_kprobe_handler;
-       probe.symbol_name = "kallsyms_lookup_name";
-       ret = register_kprobe(&probe);
-       if (ret)
-               return 0;
-       addr = (unsigned long)probe.addr;
-#ifdef CONFIG_ARM
-#ifdef CONFIG_THUMB2_KERNEL
-       if (addr)
-               addr |= 1; /* set bit 0 in address for thumb mode */
-#endif
-#endif
-       unregister_kprobe(&probe);
-       return addr;
-}
-
-unsigned long wrapper_kallsyms_lookup_name(const char *name)
-{
-       if (!kallsyms_lookup_name_sym) {
-               kallsyms_lookup_name_sym = (void *)do_get_kallsyms();
-       }
-       if (kallsyms_lookup_name_sym)
-               return kallsyms_lookup_name_sym(name);
-       else {
-               printk_once(KERN_WARNING "LTTng requires kallsyms_lookup_name\n");
-               return 0;
-       }
-}
-EXPORT_SYMBOL_GPL(wrapper_kallsyms_lookup_name);
-
-#endif