Gitweb:
http://git.kernel.org/git/?p=linux/kernel/git/torvalds/linux-2.6.git;a=commit;h=c6334593c61c71ab2e666c015eef13995736f49a
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
debugging.
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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