Dump VDSO via GDB

gdb /bin/bash
(gdb) b main
(gdb) r
(gdb) info proc map
Mapped address spaces:
          Start Addr           End Addr       Size     Offset objfile
      ...
      0x7ffff7fd1000     0x7ffff7fd3000     0x2000        0x0 [vdso]
      ...
(gdb) dump binary memory /tmp/vdso.so 0x7ffff7fd1000 0x7ffff7fd3000
(gdb) quit
file /tmp/vdso.so
/tmp/vdso.so: ELF 64-bit LSB shared object, x86-64, version 1 (SYSV), dynamically linked, BuildID[sha1]=1a3fac101214fe3ecfb3788d4f8af3018f1f2667, stripped

gdb /bin/bash (gdb) b main (gdb) r (gdb) info proc map Mapped address spaces: Start Addr End Addr Size Offset objfile ... 0x7ffff7fd1000 0x7ffff7fd3000 0x2000 0x0 [vdso] ... (gdb) dump binary memory /tmp/vdso.so 0x7ffff7fd1000 0x7ffff7fd3000 (gdb) quit file /tmp/vdso.so /tmp/vdso.so: ELF 64-bit LSB shared object, x86-64, version 1 (SYSV), dynamically linked, BuildID[sha1]=1a3fac101214fe3ecfb3788d4f8af3018f1f2667, stripped