write(1, "anycast6 dev_snmp6\t if_inet6\ti"..., 137anycast6 dev_snmp6 if_inet6 ip6_mr_vif ip_mr_vif mcfilter nf_conntrack ptype rt6_stats sockstat tcp6 unix ) = 137 ... 然而我们都知道,正常来讲操作系统中的各个进程之间是互相隔离的。那么 strace 命令是如何做到能获取其他进程执行的...
跟踪指定系统调用可以用 ptrace + seccomp。Filter and Modify System Calls with seccomp and ptrace...
// 2.等待目标进程的 PTRACE_SYSCALL // 2.1 指定要捕获目标进程的 PTRACE_SYSCALL ptrace(PTRACE_SYSCALL, pid,NULL,NULL) // 2.2 当目标进程有 SYSCALL 发生时醒来处理 waitpid(pid, &status,0) // 3.读取并解析系统调用 // 3.1 读取目标进程正在执行的系统调用号 syscall_number = ptrace(PTRACE_PEEKUSER...
// 2.1 指定要捕获目标进程的 PTRACE_SYSCALL ptrace(PTRACE_SYSCALL, pid, NULL, NULL)// 2.2 ...
此处event_filter_syscall函数直接返回true表明拦截所有系统调用。大家在自行开发分析插件时,可合理利用此函数,实现更高效的分析。 voiddr_register_filter_syscall_event(bool(*func)(void*drcontext,intsysnum));staticboolevent_filter_syscall(void*drcontext,intsysnum){returntrue;/* intercept everything */}...
Note that in cases when the tracee has another seccomp filter that returns an action value with a precedence greater than SECCOMP_RET_TRACE, strace --seccomp-bpf will not be notified. That is, if another seccomp filter, for example, disables the syscall or kills the tracee, then strace --...
表格:filter Chain INPUT (policy ACCEPT) num target prot opt source destination1 ACCEPT all ::/0 ::/0state RELATED,ESTABLISHED2 ACCEPT icmpv6 ::/0 ::/03 ACCEPT all ::/0 ::/04 ACCEPT udp ::/0 fe80::/64 state NEW udp dpt:5465 ACCEPT tcp ::/0 ::/0 state NEW tcp dpt:226 REJEC...
(toggle - default true) -h, --help output usage information and exit -m, --mask=MASK set message filter mask -n, --crack-error-numbers output descriptive text instead of error numbers for Windows errors -o, --output=FILENAME set output file to FILENAME -p, --pid=n attach to ...
5. filter strace for only one type of system call -e option can be used to return status of system call in the argument. To see just the openat ( open system call in some other systems ) system call : [root@localhost test]# strace -e openat ls /tmp/test ...
tcpdump[-aAbdDefhHIJKlLnNOpqRStuUvxX#][ -B size ][ -c count ][ -C file_size ][ -E algo:secret ][ -F file ][ -G seconds ][ -i interface ][ -j tstamptype ][ -M secret ][ -Q metadata-filter-expression ][ -r file ][ -s snaplen ][ -T type ][ --version ][ -V fil...