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# mlock ______________________________________________________
# long sys_mlock(unsigned long start, size_t len)
#
@define _SYSCALL_MLOCK_NAME
%(
name = "mlock"
%)
@define _SYSCALL_MLOCK_ARGSTR
%(
argstr = sprintf("%p, %u", addr, len)
%)
@define _SYSCALL_MLOCK_REGARGS
%(
addr = ulong_arg(1)
len = ulong_arg(2)
%)
probe syscall.mlock = dw_syscall.mlock !, nd_syscall.mlock ? {}
probe syscall.mlock.return = dw_syscall.mlock.return !, nd_syscall.mlock.return ? {}
# dw_mlock _____________________________________________________
probe dw_syscall.mlock = kernel.function("sys_mlock").call ?
{
@_SYSCALL_MLOCK_NAME
addr = __ulong($start)
len = __ulong($len)
@_SYSCALL_MLOCK_ARGSTR
}
probe dw_syscall.mlock.return = kernel.function("sys_mlock").return ?
{
@_SYSCALL_MLOCK_NAME
@SYSC_RETVALSTR($return)
}
# nd_mlock _____________________________________________________
probe nd_syscall.mlock = nd1_syscall.mlock!, nd2_syscall.mlock!, tp_syscall.mlock
{ }
probe nd1_syscall.mlock = kprobe.function("sys_mlock") ?
{
@_SYSCALL_MLOCK_NAME
asmlinkage()
@_SYSCALL_MLOCK_REGARGS
@_SYSCALL_MLOCK_ARGSTR
}
/* kernel 4.17+ */
probe nd2_syscall.mlock = kprobe.function(@arch_syscall_prefix "sys_mlock") ?
{
__set_syscall_pt_regs(pointer_arg(1))
@_SYSCALL_MLOCK_NAME
@_SYSCALL_MLOCK_REGARGS
@_SYSCALL_MLOCK_ARGSTR
}
/* kernel 3.5+, but undesirable because it affects all syscalls */
probe tp_syscall.mlock = kernel.trace("sys_enter")
{
__set_syscall_pt_regs($regs)
@__syscall_compat_gate(@const("__NR_mlock"), @const("__NR_compat_mlock"))
@_SYSCALL_MLOCK_NAME
@_SYSCALL_MLOCK_REGARGS
@_SYSCALL_MLOCK_ARGSTR
}
probe nd_syscall.mlock.return = nd1_syscall.mlock.return!, nd2_syscall.mlock.return!, tp_syscall.mlock.return
{ }
probe nd1_syscall.mlock.return = kprobe.function("sys_mlock").return ?
{
@_SYSCALL_MLOCK_NAME
@SYSC_RETVALSTR(returnval())
}
/* kernel 4.17+ */
probe nd2_syscall.mlock.return = kprobe.function(@arch_syscall_prefix "sys_mlock").return ?
{
@_SYSCALL_MLOCK_NAME
@SYSC_RETVALSTR(returnval())
}
/* kernel 3.5+, but undesirable because it affects all syscalls */
probe tp_syscall.mlock.return = kernel.trace("sys_exit")
{
__set_syscall_pt_regs($regs)
@__syscall_compat_gate(@const("__NR_mlock"), @const("__NR_compat_mlock"))
@_SYSCALL_MLOCK_NAME
@SYSC_RETVALSTR($ret)
}
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