]> err.no Git - linux-2.6/commit
[PATCH] kretprobe: kretprobe-booster
authorMasami Hiramatsu <hiramatu@sdl.hitachi.co.jp>
Sun, 26 Mar 2006 09:38:19 +0000 (01:38 -0800)
committerLinus Torvalds <torvalds@g5.osdl.org>
Sun, 26 Mar 2006 16:57:04 +0000 (08:57 -0800)
commitc9becf58d935265919bf1cb348b2c04492c8949d
tree57ec897e82bdd4c30eb19112be425fe4d64a1029
parent311ac88fd2d4194a95e9e38d2fe08917be98723c
[PATCH] kretprobe: kretprobe-booster

In normal operation, kretprobe makes a target function return to trampoline
code.  A kprobe (called trampoline_probe) has been inserted in the trampoline
code.  When the kernel hits this kprobe, it calls kretprobe's handler and it
returns to the original return address.

Kretprobe-booster removes the trampoline_probe.  It allows the trampoline code
to call kretprobe's handler directly instead of invoking kprobe.  The
trampoline code returns to the original return address.

(changelog from Chuck Ebbert <76306.1226@compuserve.com> - thanks ;))

Signed-off-by: Masami Hiramatsu <hiramatu@sdl.hitachi.co.jp>
Cc: Prasanna S Panchamukhi <prasanna@in.ibm.com>
Cc: Ananth N Mavinakayanahalli <ananth@in.ibm.com>
Cc: Anil S Keshavamurthy <anil.s.keshavamurthy@intel.com>
Cc: David S. Miller <davem@davemloft.net>
Cc: Chuck Ebbert <76306.1226@compuserve.com>
Signed-off-by: Andrew Morton <akpm@osdl.org>
Signed-off-by: Linus Torvalds <torvalds@osdl.org>
arch/i386/kernel/kprobes.c