ABI with support for compat 32/64 bits

[lttng-tools.git] / src / common / lttng-kernel-old.h

diff --git a/src/common/lttng-kernel-old.h b/src/common/lttng-kernel-old.h
new file mode 100644 (file)
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+++ b/src/common/lttng-kernel-old.h
@@ -0,0 +1,115 @@
+/*
+ * Copyright (C) 2011 - Julien Desfossez <julien.desfossez@polymtl.ca>
+ *                      Mathieu Desnoyers <mathieu.desnoyers@efficios.com>
+ *                      David Goulet <david.goulet@polymtl.ca>
+ *
+ * This program is free software; you can redistribute it and/or modify
+ * it under the terms of the GNU General Public License, version 2 only,
+ * as published by the Free Software Foundation.
+ *
+ * This program 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 General Public License for
+ * more details.
+ *
+ * You should have received a copy of the GNU General Public License along
+ * with this program; if not, write to the Free Software Foundation, Inc.,
+ * 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301 USA.
+ */
+
+#ifndef _LTTNG_KERNEL_OLD_H
+#define _LTTNG_KERNEL_OLD_H
+
+#include <stdint.h>
+#include <common/lttng-kernel.h>
+
+/*
+ * LTTng DebugFS ABI structures.
+ *
+ * This is the kernel ABI copied from lttng-modules tree.
+ */
+
+/* Perf counter attributes */
+struct lttng_kernel_old_perf_counter_ctx {
+       uint32_t type;
+       uint64_t config;
+       char name[LTTNG_KERNEL_SYM_NAME_LEN];
+};
+
+/* Event/Channel context */
+#define LTTNG_KERNEL_OLD_CONTEXT_PADDING1  16
+#define LTTNG_KERNEL_OLD_CONTEXT_PADDING2  LTTNG_KERNEL_SYM_NAME_LEN + 32
+struct lttng_kernel_old_context {
+       enum lttng_kernel_context_type ctx;
+       char padding[LTTNG_KERNEL_OLD_CONTEXT_PADDING1];
+
+       union {
+               struct lttng_kernel_old_perf_counter_ctx perf_counter;
+               char padding[LTTNG_KERNEL_OLD_CONTEXT_PADDING2];
+       } u;
+};
+
+struct lttng_kernel_old_kretprobe {
+       uint64_t addr;
+
+       uint64_t offset;
+       char symbol_name[LTTNG_KERNEL_SYM_NAME_LEN];
+};
+
+/*
+ * Either addr is used, or symbol_name and offset.
+ */
+struct lttng_kernel_old_kprobe {
+       uint64_t addr;
+
+       uint64_t offset;
+       char symbol_name[LTTNG_KERNEL_SYM_NAME_LEN];
+};
+
+/* Function tracer */
+struct lttng_kernel_old_function {
+       char symbol_name[LTTNG_KERNEL_SYM_NAME_LEN];
+};
+
+#define LTTNG_KERNEL_OLD_EVENT_PADDING1    16
+#define LTTNG_KERNEL_OLD_EVENT_PADDING2    LTTNG_KERNEL_SYM_NAME_LEN + 32
+struct lttng_kernel_old_event {
+       char name[LTTNG_KERNEL_SYM_NAME_LEN];
+       enum lttng_kernel_instrumentation instrumentation;
+       char padding[LTTNG_KERNEL_OLD_EVENT_PADDING1];
+
+       /* Per instrumentation type configuration */
+       union {
+               struct lttng_kernel_old_kretprobe kretprobe;
+               struct lttng_kernel_old_kprobe kprobe;
+               struct lttng_kernel_old_function ftrace;
+               char padding[LTTNG_KERNEL_OLD_EVENT_PADDING2];
+       } u;
+};
+
+struct lttng_kernel_old_tracer_version {
+       uint32_t major;
+       uint32_t minor;
+       uint32_t patchlevel;
+};
+
+struct lttng_kernel_old_calibrate {
+       enum lttng_kernel_calibrate_type type;  /* type (input) */
+};
+
+/*
+ * kernel channel
+ */
+#define LTTNG_KERNEL_OLD_CHANNEL_PADDING1 LTTNG_SYMBOL_NAME_LEN + 32
+struct lttng_kernel_old_channel {
+       int overwrite;                      /* 1: overwrite, 0: discard */
+       uint64_t subbuf_size;               /* bytes */
+       uint64_t num_subbuf;                /* power of 2 */
+       unsigned int switch_timer_interval; /* usec */
+       unsigned int read_timer_interval;   /* usec */
+       enum lttng_event_output output;     /* splice, mmap */
+
+       char padding[LTTNG_KERNEL_OLD_CHANNEL_PADDING1];
+};
+
+#endif /* _LTTNG_KERNEL_OLD_H */