known as the signal trampoline (described in sigreturn (2)). (3) The kernel passes control back ... trampoline code. (5) The signal trampoline calls sigreturn (2), a system call th…vDSO. symbol version __kernel_rt_sigreturn LINUX_2.6.39 __kernel_gettimeofday LINUX_2.6.39 __kernel_clock_gettime ... vDSO. symbol version __vdso_rt_sigreturn LINUX_4.15 __vdso_get…