函数逻辑报告

Linux Kernel

v5.5.9

Brick Technologies Co., Ltd

Source Code:kernel\bpf\trampoline.c Create Date:2022-07-27 14:33:01
Last Modify:2020-03-12 14:18:49 Copyright©Brick
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函数名称：The logic is similar to BPF_PROG_RUN, but with explicit rcu and preempt that* are needed for trampoline. The macro is split into* call _bpf_prog_enter* call prog->bpf_func* call __bpf_prog_exit

函数原型：u64 notrace __bpf_prog_enter(void)

返回类型：u64

参数：无

268  start等于0
270  _read_lock() - mark the beginning of an RCU read-side critical section* When synchronize_rcu() is invoked on one CPU while other CPUs* are within RCU read-side critical sections, then the* synchronize_rcu() is guaranteed to block until after all the other
271  禁止抢占()
272  如果static_branch_unlikely( & bpf_stats_enabled_key)则start等于sched_clock()
274  返回:start