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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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2
include/asm-avr32/kprobes.h
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@ -17,6 +17,8 @@ typedef u16 kprobe_opcode_t;
#define BREAKPOINT_INSTRUCTION 0xd673 /* breakpoint */
#define MAX_INSN_SIZE 2
#define kretprobe_blacklist_size 0
#define arch_remove_kprobe(p) do { } while (0)
/* Architecture specific copy of original instruction */