longsyscall(longnumber, ...); DESCRIPTION syscall() is a small library function that invokes the system call whose assembly language interface has the specifiednumberwith the specified arguments. Employingsyscall() is useful, for example, when invoking a system call that has no wrapper function in...
如果觉得很复杂,那么可以忽略这个宏定义,只要记住SYSCALL_DEFINE2(kill, pid_t, pid, int, sig)基本等价于asmlinkage long sys_kill(int pid, int sig)就足够了。 四、总结 4.1 内核空间 系统调用的函数原型的指针:位于文件/kernel/arch/arm/kernel/calls.S,格式为CALL(sys_xxx),指定了目标函数的入口地址。
SYSCALL_DEFINE2(kill, pid_t, pid, int, sig)基本等价于asmlinkage long sys_kill(int pid, int sig),这里用的是基本等价,往下看会解释原因。 回到顶部 实用技巧 比如kill命令,有两个参数.则可以直接在kernel目录下搜索“SYSCALL_DEFINE2(kill”,即可直接找到,所有对应的Syscall方法位于signal.c 三、Syscall流...
#define __SC_LONG(t, a) __typeof(__builtin_choose_expr(__TYPE_IS_LL(t), 0LL, 0L)) a #define __SC_CAST(t, a) (t) a #define __SC_ARGS(t, a) a #define __SC_TEST(t, a) (void)BUILD_BUG_ON_ZERO(!__TYPE_IS_LL(t) && sizeof(t) > sizeof(long)) #ifdef CONFIG...
SYSCALL_DEFINE2(kill, pid_t, pid, int, sig)基本等价于asmlinkage long sys_kill(int pid, int sig),这里用的是基本等价,往下看会解释原因。 实用技巧 比如kill命令, 有两个参数. 则可以直接在kernel目录下搜索 “SYSCALL_DEFINE2(kill”,即可直接找到,所有对应的Syscall方法位于signal.c ...
SYSCALL_DEFINE2(kill, pid_t, pid, int, sig) 基本等价于 asmlinkage long sys_kill(int pid, int sig),这里用的是基本等价,往下看会解释原因。 三、Syscall流程 Syscall是通过中断方式实现的,ARM平台上通过swi中断来实现系统调用,实现从用户态切换到内核态,发送软中断swi时,从中断向量表中查看跳转代码,其中...
❖ func BytePtrFromString(s string) (*byte, error) BytePtrFromString returns a pointer to a NUL-terminated array of bytes containing the text of s. If s contains a NUL byte at any location, it returns (nil, EINVAL). func ByteSliceFromString ❖ func ByteSliceFromString(s string) (...
我们逆向一个函数用作学习,选定CreateThread,ntdll中的是NtCreateThread 可以看到首先给eax赋值(这里是系统调用号SSN system-call-number),然后再执行syscall 1 2 3 4 5 6 7 .text:000000018009F600 4C 8B D1 mov r10, rcx ; NtCreateThread .text:000000018009F603 B8 4E 00 00 00 mov eax, 4Eh ;'N' ...
❖ func BytePtrFromString(s string) (*byte, error) BytePtrFromString returns a pointer to a NUL-terminated array of bytes containing the text of s. If s contains a NUL byte at any location, it returns (nil, EINVAL). func ByteSliceFromString ❖ func ByteSliceFromString(s string) (...
S_BLKSIZE = 0x200 S_IEXEC = 0x40 S_IFBLK = 0x6000 S_IFCHR = 0x2000 S_IFDIR = 0x4000 S_IFIFO = 0x1000 S_IFLNK = 0xa000 S_IFMT = 0xf000 S_IFREG = 0x8000 S_IFSOCK = 0xc000 S_IREAD = 0x100 S_IRGRP = 0x20 S_IROTH = 0x4 S_IRUSR = 0x100 S_IRWXG = 0x38 S_...