函数逻辑报告

Linux Kernel

v5.5.9

Brick Technologies Co., Ltd

Source Code:arch\x86\kernel\kprobes\ftrace.c Create Date:2022-07-27 09:38:47
Last Modify:2020-03-12 14:18:49 Copyright©Brick
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函数名称：Ftrace callback handler for kprobes -- called under preepmt disabed

函数原型：void kprobe_ftrace_handler(unsigned long ip, unsigned long parent_ip, struct ftrace_ops *ops, struct pt_regs *regs)

返回类型：void

参数：

类型参数名称
unsigned longip
unsigned longparent_ip
struct ftrace_ops *ops
struct pt_regs *regs
23  p等于Get the kprobe at this addr (if any) - called with preemption disabled
24  如果此条件成立可能性小(为编译器优化)(!p)或Is this kprobe disabled ? 则返回
27  kcb等于get_kprobe_ctlblk()
28  如果kprobe_running() will just return the current_kprobe on this CPU 则
29  kprobes_inc_nmissed_count(p)
30  否则
31  orig_ip等于ip
33  ip等于ip加sizeof(kprobe_opcode_t)
35  __this_cpu_write(current_kprobe, p)
36  kprobe_status等于kprobe_status settings
37  如果非 Called before addr is executed. 或非 Called before addr is executed. (p, regs)则
42  ip等于 location of the probe point 加sizeof mcount call
43  如果此条件成立可能性小(为编译器优化)( Called after addr is executed, unless... )则
47  ip等于orig_ip
53  __this_cpu_write(current_kprobe, NULL)