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: / usr / share / systemtap / tapset / linux /
Filename : sysc_shmctl.stp
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# shmctl _____________________________________________________
#
# long sys_shmctl (int shmid,
#                  int cmd,
#                  struct shmid_ds __user *buf)
#

@define _SYSCALL_SHMCTL_NAME
%(
	name = "shmctl"
%)

@define _SYSCALL_SHMCTL_ARGSTR
%(
	argstr = sprintf("%d, %s, %p", shmid, cmd_str, buf_uaddr)
%)

@define _SYSCALL_SHMCTL_REGARGS
%(
	shmid = int_arg(1)
	cmd = int_arg(2)
	cmd_str = _semctl_cmd(cmd)
	buf_uaddr = pointer_arg(3)
%)

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

# dw_shmctl _____________________________________________________

probe dw_syscall.shmctl = kernel.function("sys_shmctl").call ?
{
#%( arch == "powerpc" || arch == "s390" %?
	@__syscall_gate_compat_simple
#%)
	@_SYSCALL_SHMCTL_NAME
	shmid = __int32($shmid)
	cmd = __int32($cmd)
	cmd_str = _semctl_cmd(__int32($cmd))
	buf_uaddr = $buf
	@_SYSCALL_SHMCTL_ARGSTR
}
probe dw_syscall.shmctl.return = kernel.function("sys_shmctl").return ?
{
#%( arch == "powerpc" || arch == "s390" %?
	@__syscall_gate_compat_simple
#%)
	@_SYSCALL_SHMCTL_NAME
	@SYSC_RETVALSTR($return)
}

# nd_shmctl _____________________________________________________

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

probe nd1_syscall.shmctl = kprobe.function("sys_shmctl") ?
{
#%( arch == "powerpc" || arch == "s390" %?
	@__syscall_gate_compat_simple
#%)
	@_SYSCALL_SHMCTL_NAME
	asmlinkage()
	@_SYSCALL_SHMCTL_REGARGS
	@_SYSCALL_SHMCTL_ARGSTR
}

/* kernel 4.17+ */
probe nd2_syscall.shmctl = kprobe.function(@arch_syscall_prefix "sys_shmctl") ?
{
	__set_syscall_pt_regs(pointer_arg(1))
	@_SYSCALL_SHMCTL_NAME
	@_SYSCALL_SHMCTL_REGARGS
	@_SYSCALL_SHMCTL_ARGSTR
}

/* kernel 3.5+, but undesirable because it affects all syscalls */
probe tp_syscall.shmctl = kernel.trace("sys_enter")
{
	__set_syscall_pt_regs($regs)
	@__syscall_gate(@const("__NR_shmctl"))
	@_SYSCALL_SHMCTL_NAME
	@_SYSCALL_SHMCTL_REGARGS
	@_SYSCALL_SHMCTL_ARGSTR
}

probe nd_syscall.shmctl.return = nd1_syscall.shmctl.return!, nd2_syscall.shmctl.return!, tp_syscall.shmctl.return
  { }
  
probe nd1_syscall.shmctl.return = kprobe.function("sys_shmctl").return ?
{
#%( arch == "powerpc" || arch == "s390" %?
	@__syscall_gate_compat_simple
#%)
	@_SYSCALL_SHMCTL_NAME
	@SYSC_RETVALSTR(returnval())
}

/* kernel 4.17+ */
probe nd2_syscall.shmctl.return = kprobe.function(@arch_syscall_prefix "sys_shmctl").return ?
{
	@_SYSCALL_SHMCTL_NAME
	@SYSC_RETVALSTR(returnval())
}
 
/* kernel 3.5+, but undesirable because it affects all syscalls */
probe tp_syscall.shmctl.return = kernel.trace("sys_exit")
{
	__set_syscall_pt_regs($regs)
	@__syscall_gate(@const("__NR_shmctl"))
	@_SYSCALL_SHMCTL_NAME
	@SYSC_RETVALSTR($ret)
}

# compat_sys_shmctl ________________________________________
#
# long compat_sys_shmctl(int first, int second, void __user *uptr)
#

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

# dw_compat_sys_shmctl _____________________________________________________

probe dw_syscall.compat_sys_shmctl = __syscall.compat_shmctl ?,
	__syscall.compat_ipc.shmctl ?
{
	@_SYSCALL_SHMCTL_NAME
%( systemtap_v <= "2.5" %?
	first = @choose_defined($first, $shmid)
	second = @choose_defined($second, $cmd)
	uptr_uaddr = @choose_defined($uptr, $ptr)
%)
	shmid = __int32(@choose_defined($first, $shmid))
	cmd = __int32(@choose_defined($second, $cmd))
	cmd_str = _semctl_cmd(__int32(@choose_defined($second, $cmd)))
	buf_uaddr = @choose_defined($uptr, $ptr)
	@_SYSCALL_SHMCTL_ARGSTR
}
probe __syscall.compat_shmctl = kernel.function("compat_sys_shmctl").call ?
{
	@__compat_syscall_gate(@const("__NR_compat_shmctl"))
}
probe __syscall.compat_ipc.shmctl = kernel.function("compat_sys_ipc").call ?,
	kernel.function("sys32_ipc").call ?
{
	if ($call != @const("SHMCTL")) next;
}

probe dw_syscall.compat_sys_shmctl.return =
	kernel.function("compat_sys_shmctl").return ?,
	__syscall.compat_ipc.shmctl.return ?
{
	@_SYSCALL_SHMCTL_NAME
	@SYSC_RETVALSTR($return)
}
probe __syscall.compat_ipc.shmctl.return =
	kernel.function("compat_sys_ipc").return ?,
	kernel.function("sys32_ipc").return ?
{
	if (@entry($call) != @const("SHMCTL")) next;
}

# nd_compat_sys_shmctl _____________________________________________________

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

probe nd1_syscall.compat_sys_shmctl = __nd1_syscall.compat_shmctl ?,
	__nd1_syscall.compat_ipc.shmctl ?
{
	@_SYSCALL_SHMCTL_NAME
	cmd_str = _semctl_cmd(cmd)
	@_SYSCALL_SHMCTL_ARGSTR
}
probe __nd1_syscall.compat_shmctl = kprobe.function("compat_sys_shmctl") ?
{
	@__compat_syscall_gate(@const("__NR_compat_shmctl"))
%( systemtap_v <= "2.5" %?
	first = int_arg(1)
	second = int_arg(2)
	uptr_uaddr = pointer_arg(3)
%)
	shmid = int_arg(1)
	cmd = int_arg(2)
	buf_uaddr = pointer_arg(3)
}
probe __nd1_syscall.compat_ipc.shmctl = kprobe.function("compat_sys_ipc") ?,
	kprobe.function("sys32_ipc") ?
{
	if (int_arg(1) != @const("SHMCTL")) next;
%( systemtap_v <= "2.5" %?
	first = int_arg(2)
	second = int_arg(3)
	uptr_uaddr = pointer_arg(5)
%)
	shmid = int_arg(2)
	cmd = int_arg(3)
	buf_uaddr = pointer_arg(5)
}

/* kernel 4.17+ */
probe nd2_syscall.compat_sys_shmctl =
	kprobe.function(@arch_syscall_prefix "compat_sys_ipc") ?
{
	__set_syscall_pt_regs(pointer_arg(1))
	if (int_arg(1) != @const("SHMCTL")) next;
	@_SYSCALL_SHMCTL_NAME
	shmid = int_arg(2)
	cmd = int_arg(3)
	cmd_str = _semctl_cmd(cmd)
	buf_uaddr = pointer_arg(5)
	@_SYSCALL_SHMCTL_ARGSTR
}

/* kernel 3.5+, but undesirable because it affects all syscalls */
probe tp_syscall.compat_sys_shmctl = kernel.trace("sys_enter")
{
	__set_syscall_pt_regs($regs)
	@__compat_syscall_gate(@const("__NR_compat_ipc"))
	if (int_arg(1) != @const("SHMCTL")) next;
	@_SYSCALL_SHMCTL_NAME
	shmid = int_arg(2)
	cmd = int_arg(3)
	cmd_str = _semctl_cmd(cmd)
	buf_uaddr = pointer_arg(5)
	@_SYSCALL_SHMCTL_ARGSTR
}

probe nd_syscall.compat_sys_shmctl.return = nd1_syscall.compat_sys_shmctl.return!, nd2_syscall.compat_sys_shmctl.return!, tp_syscall.compat_sys_shmctl.return
  { }
  
probe nd1_syscall.compat_sys_shmctl.return =
	kprobe.function("compat_sys_shmctl").return ?,
	__nd1_syscall.compat_ipc.shmctl.return ?
{
	@_SYSCALL_SHMCTL_NAME
	@SYSC_RETVALSTR(returnval())
}
probe __nd1_syscall.compat_ipc.shmctl.return =
	kprobe.function("compat_sys_ipc").return ?,
	kprobe.function("sys32_ipc").return ?
{
	if (@entry(int_arg(1)) != @const("SHMCTL")) next;
}

/* kernel 4.17+ */
probe nd2_syscall.compat_sys_shmctl.return =
	kprobe.function(@arch_syscall_prefix "compat_sys_ipc").return ?
{
	__set_syscall_pt_regs(@entry(pointer_arg(1)))
	if (int_arg(1) != @const("SHMCTL")) next;
	@_SYSCALL_SHMCTL_NAME
	@SYSC_RETVALSTR(returnval())
}
 
/* kernel 3.5+, but undesirable because it affects all syscalls */
probe tp_syscall.compat_sys_shmctl.return = kernel.trace("sys_exit")
{
	__set_syscall_pt_regs($regs)
	@__compat_syscall_gate(@const("__NR_compat_ipc"))
	if (int_arg(1) != @const("SHMCTL")) next;
	@_SYSCALL_SHMCTL_NAME
	@SYSC_RETVALSTR($ret)
}