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kprobes: treewide: Use 'kprobe_opcode_t *' for the code address in get_optimized_kprobe()

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Since get_optimized_kprobe() is only used inside kprobes,
it doesn't need to use 'unsigned long' type for 'addr' parameter.
Make it use 'kprobe_opcode_t *' for the 'addr' parameter and
subsequent call of arch_within_optimized_kprobe() also should use
'kprobe_opcode_t *'.

Note that MAX_OPTIMIZED_LENGTH and RELATIVEJUMP_SIZE are defined
by byte-size, but the size of 'kprobe_opcode_t' depends on the
architecture. Therefore, we must be careful when calculating
addresses using those macros.

Link: https://lkml.kernel.org/r/163163040680.489837.12133032364499833736.stgit@devnote2

Signed-off-by: Masami Hiramatsu <mhiramat@kernel.org>
Signed-off-by: Steven Rostedt (VMware) <rostedt@goodmis.org>
This commit is contained in:
Masami Hiramatsu
2021-09-14 23:40:07 +09:00
committed by Steven Rostedt (VMware)
parent 57d4e31780
commit c42421e205
5 changed files with 16 additions and 15 deletions
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2
include/linux/kprobes.h
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@@ -329,7 +329,7 @@ extern void arch_unoptimize_kprobes(struct list_head *oplist,
struct list_head *done_list);
extern void arch_unoptimize_kprobe(struct optimized_kprobe *op);
extern int arch_within_optimized_kprobe(struct optimized_kprobe *op,
unsigned long addr);
kprobe_opcode_t *addr);
extern void opt_pre_handler(struct kprobe *p, struct pt_regs *regs);