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uprobes: Add exports for module use 

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>
Signed-off-by: Oleg Nesterov <oleg@redhat.com>
This commit is contained in:
Josh Stone 2013-01-13 19:03:34 +01:00 committed by Oleg Nesterov
parent af4355e91f
commit e8440c1458
2 changed files with 9 additions and 0 deletions
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3
kernel/events/uprobes.c
View File

@ -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 */
@ -851,6 +852,7 @@ int uprobe_register(struct inode *inode, loff_t offset, struct uprobe_consumer *
goto retry;
return ret;
}
EXPORT_SYMBOL_GPL(uprobe_register);
/*
* uprobe_unregister - unregister a already registered probe.
@ -871,6 +873,7 @@ void uprobe_unregister(struct inode *inode, loff_t offset, struct uprobe_consume
up_write(&uprobe->register_rwsem);
put_uprobe(uprobe);
}
EXPORT_SYMBOL_GPL(uprobe_unregister);
static int unapply_uprobe(struct uprobe *uprobe, struct mm_struct *mm)
{

6
kernel/ptrace.c
View File

@ -712,6 +712,12 @@ 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,