本文共 878 字，大约阅读时间需要 2 分钟。

vdso的全称是virtual dynamic shared object的全称，比vsyscall 安全。从vsdo.lds.s中可以看到目前vsdo 支持下面四个系统调用/* * This controls what symbols we export from the DSO. */VERSION{	LINUX_2.6.39 {	global:		__kernel_rt_sigreturn;		__kernel_gettimeofday;		__kernel_clock_gettime;		__kernel_clock_getres;	local: *;	};}可以看到vdsolinux-rm3j:/boot/grub2 # cat /proc/self/mapsaaaab7a7b000-aaaab7a83000 r-xp 00000000 00:2d 30103                      /usr/bin/cataaaab7a9a000-aaaab7a9b000 r--p 0000f000 00:2d 30103                      /usr/bin/cataaaab7a9b000-aaaab7a9c000 rw-p 00010000 00:2d 30103                      /usr/bin/cataaaabcde2000-aaaabce03000 rw-p 00000000 00:00 0                          [heap]ffffa6c0f000-ffffa6c11000 rw-p 00000000 00:00 0ffffa6c11000-ffffa6c12000 r--p 00000000 00:00 0                          [vvar]ffffa6c12000-ffffa6c13000 r-xp 00000000 00:00 0                          [vdso]

转载地址：http://einmi.baihongyu.com/