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# mknod ______________________________________________________
# long sys_mknod(const char __user * filename, int mode, unsigned dev)
@define _SYSCALL_MKNOD_NAME
%(
name = "mknod"
%)
@define _SYSCALL_MKNOD_ARGSTR
%(
argstr = sprintf("%s, %s, %u", pathname, mode_str, dev)
%)
@define _SYSCALL_MKNOD_REGARGS
%(
pathname = user_string_quoted(pointer_arg(1))
mode = uint_arg(2)
mode_str = _mknod_mode_str(mode)
dev = uint_arg(3)
%)
probe syscall.mknod = dw_syscall.mknod !, nd_syscall.mknod ? {}
probe syscall.mknod.return = dw_syscall.mknod.return !, nd_syscall.mknod.return ? {}
# dw_mknod _____________________________________________________
probe dw_syscall.mknod = kernel.function("sys_mknod").call
{
@_SYSCALL_MKNOD_NAME
pathname = user_string_quoted($filename)
mode = __uint32($mode)
mode_str = _mknod_mode_str(mode)
dev = __uint32($dev)
@_SYSCALL_MKNOD_ARGSTR
}
probe dw_syscall.mknod.return = kernel.function("sys_mknod").return
{
@_SYSCALL_MKNOD_NAME
@SYSC_RETVALSTR($return)
}
# nd_mknod _____________________________________________________
probe nd_syscall.mknod = nd1_syscall.mknod!, nd2_syscall.mknod!, tp_syscall.mknod
{ }
probe nd1_syscall.mknod = kprobe.function("sys_mknod") ?
{
@_SYSCALL_MKNOD_NAME
asmlinkage()
@_SYSCALL_MKNOD_REGARGS
@_SYSCALL_MKNOD_ARGSTR
}
/* kernel 4.17+ */
probe nd2_syscall.mknod = kprobe.function(@arch_syscall_prefix "sys_mknod") ?
{
__set_syscall_pt_regs(pointer_arg(1))
@_SYSCALL_MKNOD_NAME
@_SYSCALL_MKNOD_REGARGS
@_SYSCALL_MKNOD_ARGSTR
}
/* kernel 3.5+, but undesirable because it affects all syscalls */
probe tp_syscall.mknod = kernel.trace("sys_enter")
{
__set_syscall_pt_regs($regs)
@__syscall_compat_gate(@const("__NR_mknod"), @const("__NR_compat_mknod"))
@_SYSCALL_MKNOD_NAME
@_SYSCALL_MKNOD_REGARGS
@_SYSCALL_MKNOD_ARGSTR
}
probe nd_syscall.mknod.return = nd1_syscall.mknod.return!, nd2_syscall.mknod.return!, tp_syscall.mknod.return
{ }
probe nd1_syscall.mknod.return = kprobe.function("sys_mknod").return ?
{
@_SYSCALL_MKNOD_NAME
@SYSC_RETVALSTR(returnval())
}
/* kernel 4.17+ */
probe nd2_syscall.mknod.return = kprobe.function(@arch_syscall_prefix "sys_mknod").return ?
{
@_SYSCALL_MKNOD_NAME
@SYSC_RETVALSTR(returnval())
}
/* kernel 3.5+, but undesirable because it affects all syscalls */
probe tp_syscall.mknod.return = kernel.trace("sys_exit")
{
__set_syscall_pt_regs($regs)
@__syscall_compat_gate(@const("__NR_mknod"), @const("__NR_compat_mknod"))
@_SYSCALL_MKNOD_NAME
@SYSC_RETVALSTR($ret)
}
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