该.so文件位于内核而非磁盘,程序启动时,内核把包含某.so的内存页映射入其内存空间,对应程序就可作为普通.so使用其中的函数。 在容器中利用VDSO内存空间中的“clock_gettime() ”函数可对脏牛漏洞发起攻击,令系统崩溃并获得root权限的shell,且浏览容器之外主机上的文件。 二、漏洞利用条件 docker与宿主机共享内核,如...
ptp协议主要由三种实现方式,分别为:(1)基于支持ptp协议的芯片在物理层获取时间戳的硬件实现方式,如dp83640;(2)基于支持ptp协议的微控制器在媒体独立接口(mediaindependentinterface,mii)处获取时间戳的硬件实现方式;(3)基于ptpd2(precisiontimeprotocoldaemon)协议的软件实现方式。软硬件实现的区别在于获取时间戳的方式不...
Supports hardware and software time stamping via the Linux SO_TIMESTAMPING socket option. Supports the Linux PTP Hardware Clock (PHC) subsystem by using the clock_gettime family of calls, including the clock_adjtimex system call. Implements Boundary Clock (BC), Ordinary Clock (OC) and Transpare...
在采集数据时，获取系统时间戳。可以使用C/C++编程语言中的gettimeofday()函数或者clock_gettime()函数等...
// - see clock_gettime(3), FD_TO_CLOCKID macros. The resulting ID is // suitable for system calls like ClockGettime. funcFdToClockID(fdint)int32{returnint32((int(^fd)<<3)|3) } // IoctlPtpClockGetcaps returns the description of a given PTP device. ...
Softwaretimestamping TimestampatApplicationorOSlayer Gettimefromsystemclock Errorisrelativelyhuge SoftwareTimestamping Application Sys timestamp Clock OS error MAC PHY transmit 17Copyright2014FUJITSULIMITED ToAchieveHighPrecision HardwareTimestamping HardwareassistedtimestampatPHYorMAClayer ...
#define PTP_CLOCK_NAME_LEN 32 #endif #define HISI_PTP_VERSION "22.10.2" #define HISI_PTP_NAME "hisi_ptp" #define HISI_PTP_INT_NAME_LEN 32 #define HISI_PTP_DBGFS_STS_LEN 2048 #define HISI_PTP_DBGFS_REG_LEN 0x10000 #define HISI_RES_T_PERI_SC 0 ...
timedatectlset-ntptruephc_ctl /dev/ptp0setphc_ctl /dev/ptp0 get ptp4l -f gPTP.cfg -i eth0 -p /dev/ptp0 -m 1 2 3 4 登录后即可复制 log如下 ptp4l[1466.840]: selected /dev/ptp0 as PTP clock ptp4l[1466.876]: port1: INITIALIZING to LISTENING on INIT_COMPLETE ...
structptp_clock*ptp=container_of(pc,structptp_clock,clock); structptp_clock_info*ops=ptp->info; structptp_clock_time*pct; structtimespects; intenable,err=0; unsignedinti; switch(cmd){ casePTP_CLOCK_GETCAPS: memset(&caps,0,sizeof(caps)); ...
err = clock_gettime(CLOCK_MONOTONIC, &now); if (err) { pr_err("clock_gettime failed: %m"); return err; } peer = &p->unicast_master_table->peer_addr; if (now.tv_sec < peer->renewal_tmo) { return 0; } peer->renewal_tmo = 0; ...