1. Hook函数的覆盖完备性对于Linux下的指令执行来说,有7个Glibc API都可是实现指令执行功能,对这些API对要进行Hook /* #include <unistd.h> int execl(const char *pathname, const char *arg0, ... /* (char *)0 */ ); int execv(const char *pathname, char *const argv[]); int execle(const ...
针对进程地址空间,可执行文件的各种地址都是制定了的,除非运行时确定的特性,而系统调用,就会引入0x80处的软中断,从而引入系统调用处理程序,跳转到其入口system_call,system_call会根据系统调用号来确定调用服务,然后根据内核符号表来进行特定跳转。所以,修改这里内核符号表,就可以跳转到自己编写的函数中,完成hook。 这里...
}//hook函数inthookMyGetdents(void){//orig_getdents = (void *)sys_call_table[__NR_getdents];//sys_call_table[__NR_getdents] = (unsigned long*)&hacked_getdents;orig_getdents64= (void*)sys_call_table[217];//__NR_getdents64printk(KERN_INFO"Hook before:%p\n", orig_getdents64);...
void change_bytes(intptr_t addr, const char code[], int len) { memcpy((void*)addr, code, len); } void func_hook(intptr_t target_addr, void* hook_func) { //根据目标函数的地址确定目标函数所在的页,并将该页的权限改为可读可写可执行 intptr_t p...
child,8* ORIG_RAX,NULL);printf("The child made a ""system call %ld\n", orig_rax);ptrace(PTRACE_CONT, child,NULL,NULL); }return0; } 程序编译运行后输出: The child made asystemcall59 以及ls的结果. 系统调用号59是__NR_execve, 由子进程调用的execl产生. ...
pkey_list, check_pkey_qps(pkey, device, port_num, subnet_prefix) ib_get_cached_pkey enforce_qp_pkey_security security_ib_pkey_access -> Check if access to an IB pkey is allowed return call_int_hook(ib_pkey_access, 0, sec, subnet_prefix, pkey) -> selinux_ib_pkey_access sel_ib_...
(struct task_struct*task);size_tFTraceHookCallOriginal(struct FTraceHookContext*context);intFTraceHookInstall(struct FTraceHook*hook);intFTraceHookUninstall(struct FTraceHook*hook);intFTraceHookInitialize(struct FTraceHook*hooks,size_t hooks_size);intFTraceHookFinalize(struct FTraceHook*hooks,size_t ...
user ID subscription */structuser_namespace*user_ns;/* user_ns the caps and keyrings are relative to. */structgroup_info*group_info;/* supplementary groups for euid/fsgid *//* RCU deletion */union{intnon_rcu;/* Can we skip RCU deletion? */structrcu_headrcu;/* RCU deletion hook *...
cpu 执行断点指令时,会触发内核的断点处理函数「do_int3」,它判断是否为 kprobe 引起的断点,如果是 kprobe 机制触发的断点,会保存这个程序的状态,比如寄存器、堆栈等信息,并通过 Linux 的「notifier_call_chain」机制,将 cpu 的使用权交给之前 kprobe 的 probe handler,同时会把内核所保存的寄存器、堆栈信息传递给...
在使用的时候只需要在自定义hook函数中加入FN即可方便进行替换,如替换execve函数 intexecve(constchar*filename,char*constargv[],char*constenvp[]){staticint(*func)(constchar*,char**,char**);FN(func,int,"execve",(constchar*,char**const,char**const));printf("execve has been called!");return(...