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# rt_sigprocmask _____________________________________________
# long sys_rt_sigprocmask(int how, sigset_t __user *set, sigset_t __user *oset,
# size_t sigsetsize)
# long sys32_rt_sigprocmask(u32 how, compat_sigset_t __user *set,
# compat_sigset_t __user *oset, size_t sigsetsize)
# long compat_sys_rt_sigprocmask(int how, compat_sigset_t __user *set,
# compat_sigset_t __user *oset,
# compat_size_t sigsetsize)
#
@define _SYSCALL_RT_SIGPROCMASK_NAME
%(
name = "rt_sigprocmask"
%)
@define _SYSCALL_RT_SIGPROCMASK_ARGSTR
%(
argstr = sprintf("%s, %s, %p, %d", how_str, set_str, oldset_uaddr, sigsetsize)
%)
@define _SYSCALL_RT_SIGPROCMASK_REGARGS_STORE
%(
if (@probewrite(how))
set_int_arg(1, how)
if (@probewrite(set_uaddr))
set_pointer_arg(2, set_uaddr)
if (@probewrite(oldset_uaddr))
set_pointer_arg(3, oldset_uaddr)
if (@probewrite(sigsetsize))
set_uint_arg(4, sigsetsize)
%)
@define _SYSCALL_COMPAT_RT_SIGPROCMASK_REGARGS_STORE
%(
if (@probewrite(how))
set_int_arg(1, how)
if (@probewrite(set_uaddr))
set_pointer_arg(2, set_uaddr)
%( arch == "x86_64" && kernel_v >= "3.4" && CONFIG_COMPAT == "y" %?
if (@__compat_task &&
_stp_syscall_nr() == @const("__NR_compat_rt_sigprocmask")) {
if (@probewrite(oldset_uaddr))
set_uint_arg(3, oldset_uaddr)
if (@probewrite(sigsetsize))
set_int_arg(4, sigsetsize)
}
else
%)
{
if (@probewrite(oldset_uaddr))
set_pointer_arg(3, oldset_uaddr)
if (@probewrite(sigsetsize))
set_uint_arg(4, sigsetsize)
}
%)
probe syscall.rt_sigprocmask = dw_syscall.rt_sigprocmask !,
nd_syscall.rt_sigprocmask ? {}
probe syscall.rt_sigprocmask.return = dw_syscall.rt_sigprocmask.return !,
nd_syscall.rt_sigprocmask.return ? {}
# dw_rt_sigprocmask _____________________________________________________
probe dw_syscall.rt_sigprocmask = kernel.function("sys_rt_sigprocmask").call ?
{
%( arch != "x86_64" || kernel_v < "3.4" || CONFIG_COMPAT != "y" %?
// In kernels < 3.4, a 32-bit rt_sigprocmask call goes through
// sys32_rt_sigprocmask().
@__syscall_gate(@const("__NR_rt_sigprocmask"))
%)
@_SYSCALL_RT_SIGPROCMASK_NAME
how = __int32($how)
how_str = _sigprocmask_how_str(how)
set_uaddr = @choose_defined($set, $nset)
// In kernels 3.4+, the following kernel commit changed the
// way rt_sigprocmask is handled on x86:
//
// commit 2c73ce734653f96542a070f3c3b3e3d1cd0fba02
// Author: H. Peter Anvin <[email protected]>
// Date: Sun Feb 19 09:48:01 2012 -0800
//
// x86-64, ia32: Drop sys32_rt_sigprocmask
//
// On those kernels, a call to the 32-bit rt_sigprocmask goes
// straight to the 64-bit rt_sigprocmask function.
%( arch == "x86_64" && kernel_v >= "3.4" && CONFIG_COMPAT == "y" %?
if (@__compat_task && _stp_syscall_nr() == @const("__NR_compat_rt_sigprocmask")) {
oldset_uaddr = __uint32($oset)
set_str = _stp_compat_sigset_u(set_uaddr)
sigsetsize = __int32($sigsetsize)
@_SYSCALL_RT_SIGPROCMASK_ARGSTR
}
else
%)
{
oldset_uaddr = $oset
set_str = _stp_sigset_u(set_uaddr)
sigsetsize = $sigsetsize
@_SYSCALL_RT_SIGPROCMASK_ARGSTR
}
}
probe dw_syscall.rt_sigprocmask.return =
kernel.function("sys_rt_sigprocmask").return ?
{
%( arch != "x86_64" || kernel_v < "3.4" || CONFIG_COMPAT != "y" %?
@__syscall_gate(@const("__NR_rt_sigprocmask"))
%)
@_SYSCALL_RT_SIGPROCMASK_NAME
@SYSC_RETVALSTR($return)
}
# nd_rt_sigprocmask _____________________________________________________
probe nd_syscall.rt_sigprocmask = nd1_syscall.rt_sigprocmask!, nd2_syscall.rt_sigprocmask!, tp_syscall.rt_sigprocmask
{ }
probe nd1_syscall.rt_sigprocmask = kprobe.function("sys_rt_sigprocmask") ?
{
%( arch != "x86_64" || kernel_v < "3.4" || CONFIG_COMPAT != "y" %?
// In kernels < 3.4, a 32-bit rt_sigprocmask call goes through
// sys32_rt_sigprocmask().
@__syscall_gate(@const("__NR_rt_sigprocmask"))
%)
@_SYSCALL_RT_SIGPROCMASK_NAME
asmlinkage()
how = int_arg(1)
how_str = _sigprocmask_how_str(how)
set_uaddr = pointer_arg(2)
// In kernels 3.4+, the following kernel commit changed the
// way rt_sigprocmask is handled on x86:
//
// commit 2c73ce734653f96542a070f3c3b3e3d1cd0fba02
// Author: H. Peter Anvin <[email protected]>
// Date: Sun Feb 19 09:48:01 2012 -0800
//
// x86-64, ia32: Drop sys32_rt_sigprocmask
//
// On those kernels, a call to the 32-bit rt_sigprocmask goes
// straight to the 64-bit rt_sigprocmask function.
%( arch == "x86_64" && kernel_v >= "3.4" && CONFIG_COMPAT == "y" %?
if (@__compat_task &&
_stp_syscall_nr() == @const("__NR_compat_rt_sigprocmask")) {
oldset_uaddr = uint_arg(3)
set_str = _stp_compat_sigset_u(set_uaddr)
sigsetsize = int_arg(4)
@_SYSCALL_RT_SIGPROCMASK_ARGSTR
}
else
%)
{
oldset_uaddr = pointer_arg(3)
set_str = _stp_sigset_u(set_uaddr)
sigsetsize = uint_arg(4)
@_SYSCALL_RT_SIGPROCMASK_ARGSTR
}
}
/* kernel 4.17+ */
probe nd2_syscall.rt_sigprocmask = kprobe.function(@arch_syscall_prefix "sys_rt_sigprocmask") ?
{
__set_syscall_pt_regs(pointer_arg(1))
@_SYSCALL_RT_SIGPROCMASK_NAME
how = int_arg(1)
how_str = _sigprocmask_how_str(how)
set_uaddr = pointer_arg(2)
oldset_uaddr = pointer_arg(3)
set_str = _stp_sigset_u(set_uaddr)
sigsetsize = uint_arg(4)
@_SYSCALL_RT_SIGPROCMASK_ARGSTR
},
{
%( @_IS_SREG_KERNEL %? @_SYSCALL_RT_SIGPROCMASK_REGARGS_STORE %)
}
/* kernel 3.5+, but undesirable because it affects all syscalls */
probe tp_syscall.rt_sigprocmask = kernel.trace("sys_enter")
{
__set_syscall_pt_regs($regs)
@__syscall_compat_gate(@const("__NR_rt_sigprocmask"), @const("__NR_compat_rt_sigprocmask"))
@_SYSCALL_RT_SIGPROCMASK_NAME
how = int_arg(1)
how_str = _sigprocmask_how_str(how)
set_uaddr = pointer_arg(2)
%( arch == "x86_64" && kernel_v >= "3.4" && CONFIG_COMPAT == "y" %?
if (@__compat_task &&
_stp_syscall_nr() == @const("__NR_compat_rt_sigprocmask")) {
oldset_uaddr = uint_arg(3)
set_str = _stp_compat_sigset_u(set_uaddr)
sigsetsize = int_arg(4)
@_SYSCALL_RT_SIGPROCMASK_ARGSTR
}
else
%)
{
oldset_uaddr = pointer_arg(3)
set_str = _stp_sigset_u(set_uaddr)
sigsetsize = uint_arg(4)
@_SYSCALL_RT_SIGPROCMASK_ARGSTR
}
},
{
%( @_IS_SREG_KERNEL %? @_SYSCALL_COMPAT_RT_SIGPROCMASK_REGARGS_STORE %)
}
probe nd_syscall.rt_sigprocmask.return = nd1_syscall.rt_sigprocmask.return!, nd2_syscall.rt_sigprocmask.return!, tp_syscall.rt_sigprocmask.return
{ }
probe nd1_syscall.rt_sigprocmask.return =
kprobe.function("sys_rt_sigprocmask").return ?
{
%( arch != "x86_64" || kernel_v < "3.4" || CONFIG_COMPAT != "y" %?
@__syscall_gate(@const("__NR_rt_sigprocmask"))
%)
@_SYSCALL_RT_SIGPROCMASK_NAME
@SYSC_RETVALSTR(returnval())
}
/* kernel 4.17+ */
probe nd2_syscall.rt_sigprocmask.return = kprobe.function(@arch_syscall_prefix "sys_rt_sigprocmask").return ?
{
@_SYSCALL_RT_SIGPROCMASK_NAME
@SYSC_RETVALSTR(returnval())
}
/* kernel 3.5+, but undesirable because it affects all syscalls */
probe tp_syscall.rt_sigprocmask.return = kernel.trace("sys_exit")
{
__set_syscall_pt_regs($regs)
@__syscall_compat_gate(@const("__NR_rt_sigprocmask"), @const("__NR_compat_rt_sigprocmask"))
@_SYSCALL_RT_SIGPROCMASK_NAME
@SYSC_RETVALSTR($ret)
}
# syscall. compat_rt_sigprocmask _______________________________________________
probe syscall.compat_rt_sigprocmask = dw_syscall.compat_rt_sigprocmask !,
nd_syscall.compat_rt_sigprocmask ? {}
probe syscall.compat_rt_sigprocmask.return = dw_syscall.compat_rt_sigprocmask.return !,
nd_syscall.compat_rt_sigprocmask.return ? {}
# dw_compat_rt_sigprocmask _____________________________________________________
probe dw_syscall.compat_rt_sigprocmask =
kernel.function("compat_sys_rt_sigprocmask").call ?,
kernel.function("sys32_rt_sigprocmask").call ?
{
@_SYSCALL_RT_SIGPROCMASK_NAME
how = __int32($how)
how_str = _sigprocmask_how_str(how)
set_uaddr = @__pointer(@choose_defined($set, $nset))
set_str = _stp_compat_sigset_u(set_uaddr)
oldset_uaddr = __uint32($oset)
sigsetsize = __uint32($sigsetsize)
@_SYSCALL_RT_SIGPROCMASK_ARGSTR
}
probe dw_syscall.compat_rt_sigprocmask.return =
kernel.function("compat_sys_rt_sigprocmask").return ?,
kernel.function("sys32_rt_sigprocmask").return ?
{
@_SYSCALL_RT_SIGPROCMASK_NAME
@SYSC_RETVALSTR($return)
}
# nd_compat_rt_sigprocmask _____________________________________________________
probe nd_syscall.compat_rt_sigprocmask =
kprobe.function("compat_sys_rt_sigprocmask") ?,
kprobe.function("sys32_rt_sigprocmask") ?
{
@_SYSCALL_RT_SIGPROCMASK_NAME
if (ppfunc() != "compat_sys_rt_sigprocmask")
asmlinkage()
how = int_arg(1)
how_str = _sigprocmask_how_str(how)
set_uaddr = pointer_arg(2)
set_str = _stp_compat_sigset_u(set_uaddr)
oldset_uaddr = pointer_arg(3)
sigsetsize = uint_arg(4)
@_SYSCALL_RT_SIGPROCMASK_ARGSTR
}
probe nd_syscall.compat_rt_sigprocmask.return =
kprobe.function("compat_sys_rt_sigprocmask").return ?,
kprobe.function("sys32_rt_sigprocmask").return ?
{
@_SYSCALL_RT_SIGPROCMASK_NAME
@SYSC_RETVALSTR(returnval())
}