| From | Srikar Dronamraju <> | Date | Fri, 01 Apr 2011 20:05:48 +0530 | Subject | [PATCH v3 2.6.39-rc1-tip 17/26] 17: uprobes: register a notifier for uprobes. |
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Uprobe needs to be intimated on int3 and singlestep exceptions. Hence uprobes registers a die notifier so that its notified of the events.
Signed-off-by: Ananth N Mavinakayanahalli <ananth@in.ibm.com> Signed-off-by: Srikar Dronamraju <srikar@linux.vnet.ibm.com> --- kernel/uprobes.c | 18 ++++++++++++++++++ 1 files changed, 18 insertions(+), 0 deletions(-)
diff --git a/kernel/uprobes.c b/kernel/uprobes.c index e0ff6ba..cdd52d0 100644 --- a/kernel/uprobes.c +++ b/kernel/uprobes.c @@ -33,6 +33,7 @@ #include <linux/rmap.h> /* needed for anon_vma_prepare */ #include <linux/mman.h> /* needed for PROT_EXEC, MAP_PRIVATE */ #include <linux/file.h> /* needed for fput() */ +#include <linux/kdebug.h> /* needed for notifier mechanism */ #define UINSNS_PER_PAGE (PAGE_SIZE/UPROBES_XOL_SLOT_BYTES) #define MAX_UPROBES_XOL_SLOTS UINSNS_PER_PAGE @@ -1387,3 +1388,20 @@ int uprobe_post_notifier(struct pt_regs *regs) } return 0; } + +struct notifier_block uprobes_exception_nb = { + .notifier_call = uprobes_exception_notify, + .priority = 0x7ffffff0, +}; + +static int __init init_uprobes(void) +{ + return register_die_notifier(&uprobes_exception_nb); +} + +static void __exit exit_uprobes(void) +{ +} + +module_init(init_uprobes); +module_exit(exit_uprobes);
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