^^&&^^

Edit File: sysc_sigpending.stp

# sigpending _________________________________________________
# SYSCALL_DEFINE1(sigpending, old_sigset_t __user *, set)
# COMPAT_SYSCALL_DEFINE1(sigpending, compat_old_sigset_t __user *, set)
#

@define _SYSCALL_SIGPENDING_NAME
%(
	name = "sigpending"
%)

@define _SYSCALL_SIGPENDING_ARGSTR
%(
	argstr = sprintf("%p", set)
%)

@define _SYSCALL_SIGPENDING_REGARGS
%(
	set = pointer_arg(1)
%)

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

# dw_sigpending _____________________________________________________

probe dw_syscall.sigpending = __syscall.sigpending ?,
	kernel.function("compat_sys_sigpending").call ?
{
	@_SYSCALL_SIGPENDING_NAME
	set = @choose_defined($set, $set32)
	@_SYSCALL_SIGPENDING_ARGSTR
}
probe __syscall.sigpending = kernel.function("sys_sigpending").call ?
{
	@__syscall_gate_compat_simple
}
probe dw_syscall.sigpending.return = __syscall.sigpending.return ?,
	kernel.function("compat_sys_sigpending").return ?
{
	@_SYSCALL_SIGPENDING_NAME
	@SYSC_RETVALSTR($return)
}
probe __syscall.sigpending.return = kernel.function("sys_sigpending").return ?
{
	@__syscall_gate_compat_simple
}

# nd_sigpending _____________________________________________________

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

probe nd1_syscall.sigpending = __nd1_syscall.sigpending ?,
	kprobe.function("compat_sys_sigpending") ?
{
	@_SYSCALL_SIGPENDING_NAME
	asmlinkage()
	@_SYSCALL_SIGPENDING_REGARGS
	@_SYSCALL_SIGPENDING_ARGSTR
}
probe __nd1_syscall.sigpending = kprobe.function("sys_sigpending") ?
{
	@__syscall_gate_compat_simple
}

/* kernel 4.17+ */
probe nd2_syscall.sigpending =
	kprobe.function(@arch_syscall_prefix "compat_sys_sigpending") ?
{
	__set_syscall_pt_regs(pointer_arg(1))
	@_SYSCALL_SIGPENDING_NAME
	@_SYSCALL_SIGPENDING_REGARGS
	@_SYSCALL_SIGPENDING_ARGSTR
}

/* kernel 3.5+, but undesirable because it affects all syscalls */
probe tp_syscall.sigpending = kernel.trace("sys_enter")
{
	__set_syscall_pt_regs($regs)
	@__syscall_compat_gate(@const("__NR_sigpending"), @const("__NR_compat_sigpending"))
	@_SYSCALL_SIGPENDING_NAME
	@_SYSCALL_SIGPENDING_REGARGS
	@_SYSCALL_SIGPENDING_ARGSTR
}

probe nd_syscall.sigpending.return = nd1_syscall.sigpending.return!, nd2_syscall.sigpending.return!, tp_syscall.sigpending.return
  { }

probe nd1_syscall.sigpending.return = __nd1_syscall.sigpending.return ?,
	kprobe.function("compat_sys_sigpending").return ?
{
	@_SYSCALL_SIGPENDING_NAME
	@SYSC_RETVALSTR(returnval())
}
probe __nd1_syscall.sigpending.return =
	kprobe.function("sys_sigpending").return ?
{
	@__syscall_gate_compat_simple
}

/* kernel 4.17+ */
probe nd2_syscall.sigpending.return =
	kprobe.function(@arch_syscall_prefix "compat_sys_sigpending").return ?
{
	@_SYSCALL_SIGPENDING_NAME
	@SYSC_RETVALSTR(returnval())
}

/* kernel 3.5+, but undesirable because it affects all syscalls */
probe tp_syscall.sigpending.return = kernel.trace("sys_exit")
{
	__set_syscall_pt_regs($regs)
	@__syscall_compat_gate(@const("__NR_sigpending"), @const("__NR_compat_sigpending"))
	@_SYSCALL_SIGPENDING_NAME
	@SYSC_RETVALSTR($ret)
}