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authorJan Beulich <jbeulich@novell.com>2007-07-21 17:10:21 +0200
committerLinus Torvalds <torvalds@woody.linux-foundation.org>2007-07-21 18:37:09 -0700
commit2f30c00702aca3229e1157718675f0ee56d2a931 (patch)
tree9fed77b2b4e3fcc33088c03270d2e94e906b965b
parentcdc1793ef7f5ccc47696e3d00b827e832e4c5bdb (diff)
downloadop-kernel-dev-2f30c00702aca3229e1157718675f0ee56d2a931.zip
op-kernel-dev-2f30c00702aca3229e1157718675f0ee56d2a931.tar.gz
i386: allow debuggers to access the vsyscall page with compat vDSO
Signed-off-by: Jan Beulich <jbeulich@novell.com> Signed-off-by: Andi Kleen <ak@suse.de> Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>
-rw-r--r--arch/i386/kernel/sysenter.c4
1 files changed, 3 insertions, 1 deletions
diff --git a/arch/i386/kernel/sysenter.c b/arch/i386/kernel/sysenter.c
index ff4ee6f..6deb159 100644
--- a/arch/i386/kernel/sysenter.c
+++ b/arch/i386/kernel/sysenter.c
@@ -336,7 +336,9 @@ struct vm_area_struct *get_gate_vma(struct task_struct *tsk)
int in_gate_area(struct task_struct *task, unsigned long addr)
{
- return 0;
+ const struct vm_area_struct *vma = get_gate_vma(task);
+
+ return vma && addr >= vma->vm_start && addr < vma->vm_end;
}
int in_gate_area_no_task(unsigned long addr)
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