관리-도구

편집 파일: sysc_sched_getparam.stp

# sched_getparam _____________________________________________
#
# asmlinkage long
# sys_sched_getparam(pid_t pid,
#			  struct sched_param __user *param)
#

@define _SYSCALL_SCHED_GETPARAM_NAME
%(
	name = "sched_getparam"
%)

@define _SYSCALL_SCHED_GETPARAM_ARGSTR
%(
	argstr = sprintf("%d, %p", pid, p_uaddr)
%)

@define _SYSCALL_SCHED_GETPARAM_REGARGS
%(
	pid = int_arg(1)
	p_uaddr = pointer_arg(2)
%)

probe syscall.sched_getparam = dw_syscall.sched_getparam !,
                               nd_syscall.sched_getparam ? {}
probe syscall.sched_getparam.return = dw_syscall.sched_getparam.return !,
                                      nd_syscall.sched_getparam.return ? {}

# dw_sched_getparam _____________________________________________________

probe dw_syscall.sched_getparam = kernel.function("sys_sched_getparam").call
{
	@_SYSCALL_SCHED_GETPARAM_NAME
	pid = __int32($pid)
	p_uaddr = $param
	@_SYSCALL_SCHED_GETPARAM_ARGSTR
}
probe dw_syscall.sched_getparam.return = kernel.function("sys_sched_getparam").return
{
	@_SYSCALL_SCHED_GETPARAM_NAME
	@SYSC_RETVALSTR($return)
}

# nd_sched_getparam _____________________________________________________

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

probe nd1_syscall.sched_getparam = kprobe.function("sys_sched_getparam") ?
{
	@_SYSCALL_SCHED_GETPARAM_NAME
	asmlinkage()
	@_SYSCALL_SCHED_GETPARAM_REGARGS
	@_SYSCALL_SCHED_GETPARAM_ARGSTR
}

/* kernel 4.17+ */
probe nd2_syscall.sched_getparam = kprobe.function(@arch_syscall_prefix "sys_sched_getparam") ?
{
	__set_syscall_pt_regs(pointer_arg(1))
	@_SYSCALL_SCHED_GETPARAM_NAME
	@_SYSCALL_SCHED_GETPARAM_REGARGS
	@_SYSCALL_SCHED_GETPARAM_ARGSTR
}

/* kernel 3.5+, but undesirable because it affects all syscalls */
probe tp_syscall.sched_getparam = kernel.trace("sys_enter")
{
	__set_syscall_pt_regs($regs)
	@__syscall_compat_gate(@const("__NR_sched_getparam"), @const("__NR_compat_sched_getparam"))
	@_SYSCALL_SCHED_GETPARAM_NAME
	@_SYSCALL_SCHED_GETPARAM_REGARGS
	@_SYSCALL_SCHED_GETPARAM_ARGSTR
}

probe nd_syscall.sched_getparam.return = nd1_syscall.sched_getparam.return!, nd2_syscall.sched_getparam.return!, tp_syscall.sched_getparam.return
  { }
  
probe nd1_syscall.sched_getparam.return = kprobe.function("sys_sched_getparam").return ?
{
	@_SYSCALL_SCHED_GETPARAM_NAME
	@SYSC_RETVALSTR(returnval())
}

/* kernel 4.17+ */
probe nd2_syscall.sched_getparam.return = kprobe.function(@arch_syscall_prefix "sys_sched_getparam").return ?
{
	@_SYSCALL_SCHED_GETPARAM_NAME
	@SYSC_RETVALSTR(returnval())
}
 
/* kernel 3.5+, but undesirable because it affects all syscalls */
probe tp_syscall.sched_getparam.return = kernel.trace("sys_exit")
{
	__set_syscall_pt_regs($regs)
	@__syscall_compat_gate(@const("__NR_sched_getparam"), @const("__NR_compat_sched_getparam"))
	@_SYSCALL_SCHED_GETPARAM_NAME
	@SYSC_RETVALSTR($ret)
}