Commit e8440c14 authored by Josh Stone's avatar Josh Stone Committed by Oleg Nesterov
Browse files

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: default avatarJosh Stone <jistone@redhat.com>
Signed-off-by: default avatarOleg Nesterov <oleg@redhat.com>
parent af4355e9

kernel/events/uprobes.c

+3 −0
Original line number Diff line number Diff line
@@ -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)

{

kernel/ptrace.c

+6 −0
Original line number Diff line number Diff line
@@ -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,

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