驱动代码中可以通过kallsyms_lookup_name寻找对应的symbol,如, #ifdef CONFIG_KALLSYMS_ALL __boot_cpu_mode_sym = (void *)kallsyms_lookup_name("__boot_cpu_mode"); #else __boot_cpu_mode_sym = resolve_symbol("__boot_cpu_mode"); #endif 1. 2. 3. 4. 5....
通常情况下我们只需要_stext ~ _etext 和 _sinittext ~ _einittext之间的符号,如果需要将nm命令获得的所有符号都记录下来,则需要开启内核的CONFIG_KALLSYMS_ALL编译选项。 二. 内核符号表 内核在执行过程中,可能需要获得一个地址所在的函数名。比如发生Oops的时候,比如在输出某些调试信息的时候 - - - 使用dump...
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注: 配置CONFIG_KALLSYMS_ALL之后,就不需要修改all_symbol静态变量为1了 /dav/test # cat /proc/kallsyms | grep snd_write_bypass 805330a0 r __ksymtab_snd_write_bypass 8054504d r __kstrtab_snd_write_bypass 8086e068 B snd_write_bypass int snd_write_bypass = 0; EXPORT_SYMBOL_GPL(snd_write...
CONFIG_KALLSYMS_ALL=y CONFIG_KALLSYMS_BASE_RELATIVE=y CONFIG_BPF_SYSCALL=y # CONFIG_BPF_JIT_ALWAYS_ON is not set @@ -6684,7 +6684,7 @@ CONFIG_ARCH_HAS_UBSAN_SANITIZE_ALL=y CONFIG_ARCH_HAS_DEVMEM_IS_ALLOWED=y CONFIG_STRICT_DEVMEM=y CONFIG_IO_STRICT_DEVMEM=y # CONFIG_ARM64_PTDUMP_...
须设置 CONFIG_KALLSYMS 选项为y;如果要在 kallsyms 中包含全部符号信息,须设置 CONFIG_KALLSYMS_ALL 为y 查看kallsyms表: 得益于/proc文件系统,我们可以直接读取这个表。 1 $ less /proc/kallsyms Example: 01 000000000000a018 D per_cpu__xen_vcpu 02 000000000000a020 D per_cpu__xen_vcpu_info 03 ...
CONFIG_KALLSYMS_ALL=y 符号表中包括所有的变量(包括没有用EXPORT_SYMBOL导出的变量) CONFIG_KALLSYMS_EXTRA_PASS=y make menuconfig General setup ---> [*] Configure standard kernel features (for small systems) ---> [*] Load all symbols for debugging/ksymoops (选中此项,才有/proc/kallsyms接口文件...
38.[*]Load all symbolsfordebugging/ksymoops (选中此项,才有/proc/kallsyms接口文件,oops问题,选中此选项即可,子选项可以忽略) 39. 40.[*]Include all symbolsinkallsyms 41.[*]Doan extra kallsyms pass 42. 43.3.编译生成列表 44.内核编译的最后阶段,make会执行 45.nm-n vmlinux|scripts/kallsyms 46.nm...
[*] Include all symbols in kallsyms [*] Do an extra kallsyms pass 3.编译生成列表 内核编译的最后阶段,make会执行 nm -n vmlinux|scripts/kallsyms nm -n vmlinux生成所有的内核符号,并按地址排序,形如 ... c0100000 T startup_32 c0100000...
// allsyms_lookup_name_test #include #include #include #include intnoop_pre(structkprobe *p,structpt_regs *regs){return0; } staticstructkprobekp = { .symbol_name ="kallsyms_lookup_name", }; unsignedlong(*kallsyms_lookup_name_fun)(constchar*name)=NULL; ...