Commit:     c6334593c61c71ab2e666c015eef13995736f49a
Parent:     cba4b65d359268c40679ca75ac92c0b93cecf6de
Author:     Markus Metzger <[EMAIL PROTECTED]>
AuthorDate: Wed Jan 30 13:32:04 2008 +0100
Committer:  Ingo Molnar <[EMAIL PROTECTED]>
CommitDate: Wed Jan 30 13:32:04 2008 +0100

    x86, ptrace: overflow signal API
    Establish the user API for sending a user-defined signal to the traced task 
on a BTS buffer overflow.
    This should complete the user API for the BTS ptrace extension.
    The patches so far implement wrap-around overflow handling as is needed for 
    The remaining open is another overflow handling mechanism that sends a 
signal to the traced task on a buffer overflow.
    This will take some more time from my side.
    Since, from a user perspective, this occurs behind the scenes, the patch 
set should already be useful. More features may/will be added on top of it 
(overflow signal, pageable back-up buffers, kernel tracing, core file support, 
profiling, ...).
    Signed-off-by: Markus Metzger <[EMAIL PROTECTED]>
    Signed-off-by: Ingo Molnar <[EMAIL PROTECTED]>
    Signed-off-by: Thomas Gleixner <[EMAIL PROTECTED]>
 include/asm-x86/ptrace-abi.h |    4 +++-
 1 files changed, 3 insertions(+), 1 deletions(-)

diff --git a/include/asm-x86/ptrace-abi.h b/include/asm-x86/ptrace-abi.h
index bcf6704..b3b9e02 100644
--- a/include/asm-x86/ptrace-abi.h
+++ b/include/asm-x86/ptrace-abi.h
@@ -88,11 +88,13 @@ struct ptrace_bts_config {
        unsigned int size;
        /* bitmask of below flags */
        unsigned int flags;
+       /* buffer overflow signal */
+       unsigned int signal;
 #define PTRACE_BTS_O_TRACE     0x1 /* branch trace */
 #define PTRACE_BTS_O_SCHED     0x2 /* scheduling events w/ jiffies */
-#define PTRACE_BTS_O_SIGNAL     0x4 /* send SIG? on buffer overflow
+#define PTRACE_BTS_O_SIGNAL     0x4 /* send SIG<signal> on buffer overflow
                                       instead of wrapping around */
 #define PTRACE_BTS_O_CUT_SIZE  0x8 /* cut requested size to max available
                                       instead of failing */
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