1 files changed, 102 insertions, 0 deletions

diff --git a/kernel/trace/trace_export.c b/kernel/trace/trace_export.c
new file mode 100644
index 000000000000..4d9952d3df50
--- /dev/null
+++ b/kernel/trace/trace_export.c
@@ -0,0 +1,102 @@
+/*
+ * trace_export.c - export basic ftrace utilities to user space
+ *
+ * Copyright (C) 2009 Steven Rostedt <srostedt@redhat.com>
+ */
+#include <linux/stringify.h>
+#include <linux/kallsyms.h>
+#include <linux/seq_file.h>
+#include <linux/debugfs.h>
+#include <linux/uaccess.h>
+#include <linux/ftrace.h>
+#include <linux/module.h>
+#include <linux/init.h>
+#include <linux/fs.h>
+
+#include "trace_output.h"
+
+
+#undef TRACE_STRUCT
+#define TRACE_STRUCT(args...) args
+
+#undef TRACE_FIELD
+#define TRACE_FIELD(type, item, assign)                                 \
+        ret = trace_seq_printf(s, "\tfield:" #type " " #item ";\t"      \
+                               "offset:%u;\tsize:%u;\n",                \
+                               (unsigned int)offsetof(typeof(field), item), \
+                               (unsigned int)sizeof(field.item));       \
+        if (!ret)                                                       \
+                return 0;
+
+
+#undef TRACE_FIELD_SPECIAL
+#define TRACE_FIELD_SPECIAL(type_item, item, cmd)                       \
+        ret = trace_seq_printf(s, "\tfield special:" #type_item ";\t"   \
+                               "offset:%u;\tsize:%u;\n",                \
+                               (unsigned int)offsetof(typeof(field), item), \
+                               (unsigned int)sizeof(field.item));       \
+        if (!ret)                                                       \
+                return 0;
+
+#undef TRACE_FIELD_ZERO_CHAR
+#define TRACE_FIELD_ZERO_CHAR(item)                                     \
+        ret = trace_seq_printf(s, "\tfield: char " #item ";\t"          \
+                               "offset:%u;\tsize:0;\n",                 \
+                               (unsigned int)offsetof(typeof(field), item)); \
+        if (!ret)                                                       \
+                return 0;
+
+
+#undef TP_RAW_FMT
+#define TP_RAW_FMT(args...) args
+
+#undef TRACE_EVENT_FORMAT
+#define TRACE_EVENT_FORMAT(call, proto, args, fmt, tstruct, tpfmt)      \
+static int                                                              \
+ftrace_format_##call(struct trace_seq *s)                               \
+{                                                                       \
+        struct args field;                                              \
+        int ret;                                                        \
+                                                                        \
+        tstruct;                                                        \
+                                                                        \
+        trace_seq_printf(s, "\nprint fmt: \"%s\"\n", tpfmt);            \
+                                                                        \
+        return ret;                                                     \
+}
+
+#include "trace_event_types.h"
+
+#undef TRACE_ZERO_CHAR
+#define TRACE_ZERO_CHAR(arg)
+
+#undef TRACE_FIELD
+#define TRACE_FIELD(type, item, assign)\
+        entry->item = assign;
+
+#undef TRACE_FIELD
+#define TRACE_FIELD(type, item, assign)\
+        entry->item = assign;
+
+#undef TP_CMD
+#define TP_CMD(cmd...)  cmd
+
+#undef TRACE_ENTRY
+#define TRACE_ENTRY     entry
+
+#undef TRACE_FIELD_SPECIAL
+#define TRACE_FIELD_SPECIAL(type_item, item, cmd) \
+        cmd;
+
+#undef TRACE_EVENT_FORMAT
+#define TRACE_EVENT_FORMAT(call, proto, args, fmt, tstruct, tpfmt)      \
+                                                                        \
+static struct ftrace_event_call __used                                  \
+__attribute__((__aligned__(4)))                                         \
+__attribute__((section("_ftrace_events"))) event_##call = {             \
+        .name                   = #call,                                \
+        .id                     = proto,                                \
+        .system                 = __stringify(TRACE_SYSTEM),            \
+        .show_format            = ftrace_format_##call,                 \
+}
+#include "trace_event_types.h"