| From | Srikar Dronamraju <> | Date | Thu, 16 Dec 2010 15:30:21 +0530 | Subject | [RFC] [PATCH 2.6.37-rc5-tip 16/20] 16: 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 | 19 +++++++++++++++++++ 1 files changed, 19 insertions(+), 0 deletions(-)
diff --git a/kernel/uprobes.c b/kernel/uprobes.c index 3d21d8f..93a3118 100644 --- a/kernel/uprobes.c +++ b/kernel/uprobes.c @@ -34,6 +34,7 @@ #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 @@ -1170,3 +1171,21 @@ 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) +{ + register_die_notifier(&uprobes_exception_nb); + return 0; +} + +static void __exit exit_uprobes(void) +{ +} + +module_init(init_uprobes); +module_exit(exit_uprobes);
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