관리-도구
편집 파일: sysc_poll.stp
# poll _______________________________________________________ # # long sys_poll(struct pollfd __user * ufds, unsigned int nfds, int timeout) # @define _SYSCALL_POLL_NAME %( name = "poll" %) @define _SYSCALL_POLL_ARGSTR %( argstr = sprintf("%p, %u, %d", ufds_uaddr, nfds, timeout) %) @define _SYSCALL_POLL_REGARGS %( ufds_uaddr = pointer_arg(1) nfds = uint_arg(2) timeout = int_arg(3) %) probe syscall.poll = dw_syscall.poll !, nd_syscall.poll ? {} probe syscall.poll.return = dw_syscall.poll.return !, nd_syscall.poll.return ? {} # dw_poll _____________________________________________________ probe dw_syscall.poll = kernel.function("sys_poll").call { @_SYSCALL_POLL_NAME ufds_uaddr = $ufds nfds = __uint32($nfds) timeout = __int32(@choose_defined($timeout_msecs, $timeout)) @_SYSCALL_POLL_ARGSTR } probe dw_syscall.poll.return = kernel.function("sys_poll").return { @_SYSCALL_POLL_NAME @SYSC_RETVALSTR($return) } # nd_poll _____________________________________________________ probe nd_syscall.poll = nd1_syscall.poll!, nd2_syscall.poll!, tp_syscall.poll { } probe nd1_syscall.poll = kprobe.function("sys_poll") ? { @_SYSCALL_POLL_NAME asmlinkage() @_SYSCALL_POLL_REGARGS @_SYSCALL_POLL_ARGSTR } /* kernel 4.17+ */ probe nd2_syscall.poll = kprobe.function(@arch_syscall_prefix "sys_poll") ? { __set_syscall_pt_regs(pointer_arg(1)) @_SYSCALL_POLL_NAME @_SYSCALL_POLL_REGARGS @_SYSCALL_POLL_ARGSTR } /* kernel 3.5+, but undesirable because it affects all syscalls */ probe tp_syscall.poll = kernel.trace("sys_enter") { __set_syscall_pt_regs($regs) @__syscall_compat_gate(@const("__NR_poll"), @const("__NR_compat_poll")) @_SYSCALL_POLL_NAME @_SYSCALL_POLL_REGARGS @_SYSCALL_POLL_ARGSTR } probe nd_syscall.poll.return = nd1_syscall.poll.return!, nd2_syscall.poll.return!, tp_syscall.poll.return { } probe nd1_syscall.poll.return = kprobe.function("sys_poll").return ? { @_SYSCALL_POLL_NAME @SYSC_RETVALSTR(returnval()) } /* kernel 4.17+ */ probe nd2_syscall.poll.return = kprobe.function(@arch_syscall_prefix "sys_poll").return ? { @_SYSCALL_POLL_NAME @SYSC_RETVALSTR(returnval()) } /* kernel 3.5+, but undesirable because it affects all syscalls */ probe tp_syscall.poll.return = kernel.trace("sys_exit") { __set_syscall_pt_regs($regs) @__syscall_compat_gate(@const("__NR_poll"), @const("__NR_compat_poll")) @_SYSCALL_POLL_NAME @SYSC_RETVALSTR($ret) }