관리-도구

편집 파일: sysc_exit.stp

# exit _______________________________________________________
# long sys_exit(int error_code)
#
# sys_exit() never returns, and is blacklisted for return probes,
# so no alias here.  See bz6588.
# NB: the explicit .call ensures that alias suffixes can't infer .return

@define _SYSCALL_EXIT_NAME
%(
	name = "exit"
%)

@define _SYSCALL_EXIT_ARGSTR
%(
	argstr = sprint(status)
%)

@define _SYSCALL_EXIT_REGARGS
%(
	status = int_arg(1)
%)

probe syscall.exit = dw_syscall.exit !, nd_syscall.exit {}

probe syscall.exit.return = never
{
	@_SYSCALL_EXIT_NAME
	@SYSC_RETVALSTR(0)
}

# dw_exit _____________________________________________________

probe dw_syscall.exit = kernel.function("sys_exit").call
{
	@_SYSCALL_EXIT_NAME
	status = __int32($error_code)
	@_SYSCALL_EXIT_ARGSTR
}

# nd_exit _____________________________________________________

probe nd_syscall.exit = nd1_syscall.exit!, nd2_syscall.exit!, tp_syscall.exit
  { }

probe nd1_syscall.exit = kprobe.function("sys_exit").call
{
	@_SYSCALL_EXIT_NAME
	asmlinkage()
	@_SYSCALL_EXIT_REGARGS
	@_SYSCALL_EXIT_ARGSTR
}

/* kernel 4.17+ */
probe nd2_syscall.exit = kprobe.function(@arch_syscall_prefix "sys_exit")
{
	__set_syscall_pt_regs(pointer_arg(1))
	@_SYSCALL_EXIT_NAME
	@_SYSCALL_EXIT_REGARGS
	@_SYSCALL_EXIT_ARGSTR
}

/* kernel 3.5+, but undesirable because it affects all syscalls */
probe tp_syscall.exit = kernel.trace("sys_enter")
{
	__set_syscall_pt_regs($regs)
	@__syscall_compat_gate(@const("__NR_exit"), @const("__NR_compat_exit"))
	@_SYSCALL_EXIT_NAME
	@_SYSCALL_EXIT_REGARGS
	@_SYSCALL_EXIT_ARGSTR
}