函数逻辑报告

Linux Kernel

v5.5.9

Brick Technologies Co., Ltd

Source Code:kernel\bpf\syscall.c Create Date:2022-07-27 14:07:09
Last Modify:2022-05-19 18:06:12 Copyright©Brick
首页 函数Tree
注解内核,赢得工具下载SCCTEnglish

函数名称：bpf_insn_prepare_dump

函数原型：static struct bpf_insn *bpf_insn_prepare_dump(const struct bpf_prog *prog)

返回类型：struct bpf_insn

参数：

类型参数名称
const struct bpf_prog *prog
2408  insns等于kmemdup(insnsi, bpf_prog_insn_size(prog), GFP_USER)
2410  如果非insns则返回:insns
2413  以i小于 Number of filter blocks 循环
2414  如果 opcode 恒等于BPF_JMP按位或unused opcode to mark special call to bpf_tail_call() helper 的值则
2415  opcode 等于BPF_JMP按位或unction call
2416  signed immediate constant 等于BPF_FUNC_tail_call
2419  如果 opcode 恒等于BPF_JMP按位或unction call 的值或 opcode 恒等于BPF_JMP按位或unused opcode to mark call to interpreter with arguments 的值则
2421  如果 opcode 恒等于BPF_JMP按位或unused opcode to mark call to interpreter with arguments 的值则 opcode 等于BPF_JMP按位或unction call
2423  如果非bpf_dump_raw_ok()则 signed immediate constant 等于0
2425  继续下一循环
2428  如果 opcode 不等于BPF_LD按位或BPF_IMM按位或double word (64-bit) 的值则继续下一循环
2431  imm等于 signed immediate constant 左移32位按位或 signed immediate constant
2432  map等于bpf_map_from_imm(prog, imm, & off, & type)
2433  如果map则
2434  source register 等于type
2435  signed immediate constant 等于id
2436  signed immediate constant 等于off
2437  继续下一循环
2441  返回:insns
调用者
名称描述
bpf_prog_get_info_by_fd