反之,如果没有 kallsyms 的帮助,内核只能将十六进制的符号地址呈现给外界,因为机器能理解的只有符号地址,而并不包括人类可读的符号名称。 一般来说,内核只会导出由EXPORT_PARM宏(如EXPORT_SYMBOL_GPL、EXPORT_SYMBOL等)指定的符号给模块使用。为了使debugger提供更好的调试功能,需要使用kallsyms工具为内核生成__kallsyms...
static inline void print_symbol(const char *fmt, unsigned long addr) { __check_printsym_format(fmt, ""); __print_symbol(fmt, (unsigned long)__builtin_extract_return_addr((void *)addr)); } void __print_symbol(const char *fmt, unsigned long address) { char buffer[KSYM_SYMBOL_LEN];...
kallsyms抽取了内核用到的所有函数地址(全局的、静态的)和非栈数据变量地址,生成一个数据块,作为只读数据链接进kernel image,相当于内核中存了一个System.map。需要配置CONFIG_KALLSYMS .config CONFIG_KALLSYMS=y 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_EX...
static inline void print_symbol(const char *fmt, unsigned long addr) { __check_printsym_format(fmt, ""); __print_symbol(fmt, (unsigned long)__builtin_extract_return_addr((void *)addr)); } void __print_symbol(const char *fmt, unsigned long address) { char buffer[KSYM_SYMBOL_LEN];...
33.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) 34.CONFIG_KALLSYMS_EXTRA_PASS=y 35.make menuconfig 36.General setup---> 37.[*]Configure standard kernel features(forsmall systems)---> 38.[*]Load all symbolsfordebugging/ksymoops (选中此项,才有/proc/kalls...
static int __init find_symbol_init (void);static void __exit find_symbol_exit (void);const struct kernel_symbol *(*find_symbol1)(const char *name, struct module **owner, const unsigned long **crc, bool gplok, bool warn) = 0xffffffc00027cab4;static const char *sym_array[] = { ...
If no symbol was found, just saves * its @address as is. * * This function returns the number of bytes stored in @buffer. */ int sprint_symbol_no_offset(char *buffer, unsigned long address) { return __sprint_symbol(buffer, address, 0, 0); } EXPORT_SYMBOL_GPL(sprint_symbol...
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(forsmall systems)---> [*]Load all symbolsfordebugging/ksymoops (选中此项,才有/proc/kallsyms接口文件,oops问题,选...
/ kernel / kallsyms.c v6 v5 v4 v4.20 v4.19 v4.18 v4.17 v4.16 v4.15 v4.14 v4.13 v4.12 v4.11 v4.10 v4.9 v4.8 v4.7 v4.6 v4.5 v4.4 v4.4.302 v4.4.301 v4.4.300 v4.4.299 v4.4.298 v4.4.297 v4.4.296 v4.4.295 v4.4.294 v4.4.293 v4.4.292 v4.4.291 ...
(2)调用kallsyms_lookup_name_func获取其它未export的函数的地址指针(print_modules) // allsyms_lookup_name_test #include #include #include #include intnoop_pre(structkprobe *p,structpt_regs *regs){return0; } staticstructkprobekp = { .symbol_name ="kallsyms_lookup_name", ...