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Subject[PATCH] uprobes: Add exports for module use
Date
The original pull message for uprobes (commit 654443e2) noted:

This tree includes uprobes support in 'perf probe' - but SystemTap
(and other tools) can take advantage of user probe points as well.

In order to actually be usable in module-based tools like SystemTap, the
interface needs to be exported. This patch first adds the obvious
exports for uprobe_register and uprobe_unregister. Then it also adds
one for task_user_regset_view, which is necessary to get the correct
state of userspace registers.

Signed-off-by: Josh Stone <jistone@redhat.com>
---
kernel/events/uprobes.c | 3 +++
kernel/ptrace.c | 7 +++++++
2 files changed, 10 insertions(+)

diff --git a/kernel/events/uprobes.c b/kernel/events/uprobes.c
index dea7acf..1db8cb6 100644
--- a/kernel/events/uprobes.c
+++ b/kernel/events/uprobes.c
@@ -27,6 +27,7 @@
#include <linux/pagemap.h> /* read_mapping_page */
#include <linux/slab.h>
#include <linux/sched.h>
+#include <linux/export.h>
#include <linux/rmap.h> /* anon_vma_prepare */
#include <linux/mmu_notifier.h> /* set_pte_at_notify */
#include <linux/swap.h> /* try_to_free_swap */
@@ -873,6 +874,7 @@ int uprobe_register(struct inode *inode, loff_t offset, struct uprobe_consumer *

return ret;
}
+EXPORT_SYMBOL_GPL(uprobe_register);

/*
* uprobe_unregister - unregister a already registered probe.
@@ -904,6 +906,7 @@ void uprobe_unregister(struct inode *inode, loff_t offset, struct uprobe_consume
if (uprobe)
put_uprobe(uprobe);
}
+EXPORT_SYMBOL_GPL(uprobe_unregister);

static struct rb_node *
find_node_in_range(struct inode *inode, loff_t min, loff_t max)
diff --git a/kernel/ptrace.c b/kernel/ptrace.c
index 1599157..24eee5d 100644
--- a/kernel/ptrace.c
+++ b/kernel/ptrace.c
@@ -673,6 +673,13 @@ static int ptrace_regset(struct task_struct *task, int req, unsigned int type,
kiov->iov_len, kiov->iov_base);
}

+/*
+ * This is declared in linux/regset.h and defined in machine-dependent
+ * code. We put the export here, near the primary machine-neutral use,
+ * to ensure no machine forgets it.
+ */
+EXPORT_SYMBOL_GPL(task_user_regset_view);
+
#endif

int ptrace_request(struct task_struct *child, long request,
--
1.7.11.7


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