# rt_sigsuspend ______________________________________________
#
# SYSCALL_DEFINE2(rt_sigsuspend, sigset_t __user *, unewset, size_t, sigsetsize)
#

@define _SYSCALL_RT_SIGSUSPEND_NAME
%(
	name = "rt_sigsuspend"
%)

@define _SYSCALL_RT_SIGSUSPEND_ARGSTR
%(
	argstr = sprintf("%s, %u", set_str, sigsetsize)
%)

@define _SYSCALL_RT_SIGSUSPEND_REGARGS
%(
	set_uaddr = pointer_arg(1)
	sigsetsize = ulong_arg(2)
	set_str = (@__compat_task ? _stp_compat_sigset_u(set_uaddr)
	           : _stp_sigset_u(set_uaddr))
%)

@define _SYSCALL_RT_SIGSUSPEND_REGARGS_STORE
%(
        if (@probewrite(set_uaddr))
          set_pointer_arg(1, set_uaddr)

	if (@probewrite(sigsetsize))
	  set_ulong_arg(2, sigsetsize)
%)

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

# dw_rt_sigsuspend _____________________________________________________

probe dw_syscall.rt_sigsuspend = kernel.function("compat_sys_rt_sigsuspend").call ?,
                              kernel.function("ia64_rt_sigsuspend").call ?,
                              kernel.function("sys_rt_sigsuspend").call ?
{
	@_SYSCALL_RT_SIGSUSPEND_NAME
	set_uaddr = @__pointer($unewset)
	sigsetsize = @__compat_ulong($sigsetsize)
	set_str = (@__compat_task ? _stp_compat_sigset_u(set_uaddr)
	           : _stp_sigset_u(set_uaddr))
	@_SYSCALL_RT_SIGSUSPEND_ARGSTR
}
probe dw_syscall.rt_sigsuspend.return =
	kernel.function("compat_sys_rt_sigsuspend").return ?,
	kernel.function("ia64_rt_sigsuspend").return ?,
	kernel.function("sys_rt_sigsuspend").return ?
{
	@_SYSCALL_RT_SIGSUSPEND_NAME
	@SYSC_RETVALSTR($return)
}

# nd_rt_sigsuspend _____________________________________________________

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

probe nd1_syscall.rt_sigsuspend = kprobe.function("sys_rt_sigsuspend") ?,
	kprobe.function("ia64_rt_sigsuspend") ?,
	kprobe.function("compat_sys_rt_sigsuspend") ?
{
	asmlinkage()
	@_SYSCALL_RT_SIGSUSPEND_NAME
	@_SYSCALL_RT_SIGSUSPEND_REGARGS
	@_SYSCALL_RT_SIGSUSPEND_ARGSTR
}

/* kernel 4.17+ */
probe nd2_syscall.rt_sigsuspend = kprobe.function(@arch_syscall_prefix "sys_rt_sigsuspend") ?
{
	__set_syscall_pt_regs(pointer_arg(1))
	@_SYSCALL_RT_SIGSUSPEND_NAME
	@_SYSCALL_RT_SIGSUSPEND_REGARGS
	@_SYSCALL_RT_SIGSUSPEND_ARGSTR
},
{
        %( @_IS_SREG_KERNEL %? @_SYSCALL_RT_SIGSUSPEND_REGARGS_STORE %)
}

/* kernel 3.5+, but undesirable because it affects all syscalls */
probe tp_syscall.rt_sigsuspend = kernel.trace("sys_enter")
{
	__set_syscall_pt_regs($regs)
	@__syscall_compat_gate(@const("__NR_rt_sigsuspend"), @const("__NR_compat_rt_sigsuspend"))
	@_SYSCALL_RT_SIGSUSPEND_NAME
	@_SYSCALL_RT_SIGSUSPEND_REGARGS
	@_SYSCALL_RT_SIGSUSPEND_ARGSTR
},
{
        %( @_IS_SREG_KERNEL %? @_SYSCALL_RT_SIGSUSPEND_REGARGS_STORE %)
}

probe nd_syscall.rt_sigsuspend.return = nd1_syscall.rt_sigsuspend.return!, nd2_syscall.rt_sigsuspend.return!, tp_syscall.rt_sigsuspend.return
  { }
  
probe nd1_syscall.rt_sigsuspend.return =
	kprobe.function("sys_rt_sigsuspend").return ?,
	kprobe.function("ia64_rt_sigsuspend").return ?,
	kprobe.function("compat_sys_rt_sigsuspend").return ?
{
	@_SYSCALL_RT_SIGSUSPEND_NAME
	@SYSC_RETVALSTR(returnval())
}

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