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kprobes: support kretprobe blacklist

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Introduce architecture dependent kretprobe blacklists to prohibit users
from inserting return probes on the function in which kprobes can be
inserted but kretprobes can not.

This patch also removes "__kprobes" mark from "__switch_to" on x86_64 and
registers "__switch_to" to the blacklist on x86-64, because that mark is to
prohibit user from inserting only kretprobe.

Signed-off-by: Masami Hiramatsu <[email protected]>
Cc: Prasanna S Panchamukhi <[email protected]>
Acked-by: Ananth N Mavinakayanahalli <[email protected]>
Cc: Anil S Keshavamurthy <[email protected]>
Signed-off-by: Andrew Morton <[email protected]>
Signed-off-by: Linus Torvalds <[email protected]>
This commit is contained in:
Masami Hiramatsu 2007-10-16 01:27:49 -07:00 • committed by Linus Torvalds
commit f438d914b2
17 changed files with 64 additions and 1 deletions
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1
include/asm-s390/kprobes.h
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@ -47,6 +47,7 @@ typedef u16 kprobe_opcode_t;
: (((unsigned long)current_thread_info()) + THREAD_SIZE - (ADDR)))
#define ARCH_SUPPORTS_KRETPROBES
#define kretprobe_blacklist_size 0
#define KPROBE_SWAP_INST 0x10