fix: Add missing 'pselect6_time32' and 'ppoll_time32' syscall overrides

[lttng-modules.git] / probes / lttng-kprobes.c

diff --git a/probes/lttng-kprobes.c b/probes/lttng-kprobes.c
deleted file mode 100644 (file)
index 650144c..0000000
--- a/probes/lttng-kprobes.c
+++ /dev/null
@@ -1,148 +0,0 @@
-/*
- * (C) Copyright       2009-2011 -
- *             Mathieu Desnoyers <mathieu.desnoyers@efficios.com>
- *
- * LTTng kprobes integration module.
- *
- * Dual LGPL v2.1/GPL v2 license.
- */
-
-#include <linux/module.h>
-#include <linux/kprobes.h>
-#include <linux/slab.h>
-#include "../ltt-events.h"
-#include "../wrapper/ringbuffer/frontend_types.h"
-#include "../wrapper/vmalloc.h"
-#include "../ltt-tracer.h"
-
-static
-int lttng_kprobes_handler_pre(struct kprobe *p, struct pt_regs *regs)
-{
-       struct ltt_event *event =
-               container_of(p, struct ltt_event, u.kprobe.kp);
-       struct ltt_channel *chan = event->chan;
-       struct lib_ring_buffer_ctx ctx;
-       int ret;
-       unsigned long data = (unsigned long) p->addr;
-
-       if (!ACCESS_ONCE(chan->session->active))
-               return 0;
-       lib_ring_buffer_ctx_init(&ctx, chan->chan, NULL, sizeof(data),
-                                ltt_alignof(data), -1);
-       ret = chan->ops->event_reserve(&ctx, event->id);
-       if (ret < 0)
-               return 0;
-       lib_ring_buffer_align_ctx(&ctx, ltt_alignof(data));
-       chan->ops->event_write(&ctx, &data, sizeof(data));
-       chan->ops->event_commit(&ctx);
-       return 0;
-}
-
-/*
- * Create event description
- */
-static
-int lttng_create_kprobe_event(const char *name, struct ltt_event *event)
-{
-       struct lttng_event_field *field;
-       struct lttng_event_desc *desc;
-       int ret;
-
-       desc = kzalloc(sizeof(*event->desc), GFP_KERNEL);
-       if (!desc)
-               return -ENOMEM;
-       desc->name = kstrdup(name, GFP_KERNEL);
-       if (!desc->name) {
-               ret = -ENOMEM;
-               goto error_str;
-       }
-       desc->nr_fields = 1;
-       desc->fields = field =
-               kzalloc(1 * sizeof(struct lttng_event_field), GFP_KERNEL);
-       if (!field) {
-               ret = -ENOMEM;
-               goto error_field;
-       }
-       field->name = "ip";
-       field->type.atype = atype_integer;
-       field->type.u.basic.integer.size = sizeof(unsigned long) * CHAR_BIT;
-       field->type.u.basic.integer.alignment = ltt_alignof(unsigned long) * CHAR_BIT;
-       field->type.u.basic.integer.signedness = 0;
-       field->type.u.basic.integer.reverse_byte_order = 0;
-       field->type.u.basic.integer.base = 16;
-       field->type.u.basic.integer.encoding = lttng_encode_none;
-       desc->owner = THIS_MODULE;
-       event->desc = desc;
-
-       return 0;
-
-error_field:
-       kfree(desc->name);
-error_str:
-       kfree(desc);
-       return ret;
-}
-
-int lttng_kprobes_register(const char *name,
-                          const char *symbol_name,
-                          uint64_t offset,
-                          uint64_t addr,
-                          struct ltt_event *event)
-{
-       int ret;
-
-       ret = lttng_create_kprobe_event(name, event);
-       if (ret)
-               goto error;
-       memset(&event->u.kprobe.kp, 0, sizeof(event->u.kprobe.kp));
-       event->u.kprobe.kp.pre_handler = lttng_kprobes_handler_pre;
-       event->u.kprobe.symbol_name =
-               kzalloc(LTTNG_SYM_NAME_LEN * sizeof(char),
-                       GFP_KERNEL);
-       if (!event->u.kprobe.symbol_name) {
-               ret = -ENOMEM;
-               goto name_error;
-       }
-       memcpy(event->u.kprobe.symbol_name, symbol_name,
-              LTTNG_SYM_NAME_LEN * sizeof(char));
-       event->u.kprobe.kp.symbol_name =
-               event->u.kprobe.symbol_name;
-       event->u.kprobe.kp.offset = offset;
-       event->u.kprobe.kp.addr = (void *) addr;
-
-       /*
-        * Ensure the memory we just allocated don't trigger page faults.
-        * Well.. kprobes itself puts the page fault handler on the blacklist,
-        * but we can never be too careful.
-        */
-       wrapper_vmalloc_sync_all();
-
-       ret = register_kprobe(&event->u.kprobe.kp);
-       if (ret)
-               goto register_error;
-       return 0;
-
-register_error:
-       kfree(event->u.kprobe.symbol_name);
-name_error:
-       kfree(event->desc->fields);
-       kfree(event->desc->name);
-       kfree(event->desc);
-error:
-       return ret;
-}
-EXPORT_SYMBOL_GPL(lttng_kprobes_register);
-
-void lttng_kprobes_unregister(struct ltt_event *event)
-{
-       unregister_kprobe(&event->u.kprobe.kp);
-       kfree(event->u.kprobe.symbol_name);
-       kfree(event->desc->fields);
-       kfree(event->desc->name);
-       kfree(event->desc);
-}
-EXPORT_SYMBOL_GPL(lttng_kprobes_unregister);
-
-MODULE_LICENSE("GPL and additional rights");
-MODULE_AUTHOR("Mathieu Desnoyers");
-MODULE_DESCRIPTION("Linux Trace Toolkit Kprobes Support");