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|
# prctl ______________________________________________________
#
# asmlinkage long
# sys_prctl(int option,
# unsigned long arg2,
# unsigned long arg3,
# unsigned long arg4,
# unsigned long arg5)
#
@define _SYSCALL_PRCTL_NAME
%(
name = "prctl"
%)
@define _SYSCALL_PRCTL_ARGSTR
%(
argstr = _prctl_argstr(option, arg2, arg3, arg4, arg5)
%)
@define _SYSCALL_PRCTL_REGARGS
%(
option = int_arg(1)
arg2 = ulong_arg(2)
arg3 = ulong_arg(3)
arg4 = ulong_arg(4)
arg5 = ulong_arg(5)
%)
@define _SYSCALL_PRCTL_REGARGS_STORE
%(
if (@probewrite(option))
set_int_arg(1, option)
if (@probewrite(arg2))
set_ulong_arg(2, arg2)
if (@probewrite(arg3))
set_ulong_arg(3, arg3)
if (@probewrite(arg4))
set_ulong_arg(4, arg4)
if (@probewrite(arg5))
set_ulong_arg(5, arg5)
%)
probe syscall.prctl = dw_syscall.prctl !, nd_syscall.prctl ? {}
probe syscall.prctl.return = dw_syscall.prctl.return !, nd_syscall.prctl.return ? {}
# dw_prctl _____________________________________________________
probe dw_syscall.prctl = kernel.function("sys_prctl").call
{
@_SYSCALL_PRCTL_NAME
option = __int32($option)
arg2 = $arg2
arg3 = $arg3
arg4 = $arg4
arg5 = $arg5
@_SYSCALL_PRCTL_ARGSTR
}
probe dw_syscall.prctl.return = kernel.function("sys_prctl").return
{
@_SYSCALL_PRCTL_NAME
@SYSC_RETVALSTR($return)
}
# nd_prctl _____________________________________________________
probe nd_syscall.prctl = nd1_syscall.prctl!, nd2_syscall.prctl!, tp_syscall.prctl
{ }
probe nd1_syscall.prctl = kprobe.function("sys_prctl") ?
{
@_SYSCALL_PRCTL_NAME
asmlinkage()
@_SYSCALL_PRCTL_REGARGS
@_SYSCALL_PRCTL_ARGSTR
}
/* kernel 4.17+ */
probe nd2_syscall.prctl = kprobe.function(@arch_syscall_prefix "sys_prctl") ?
{
__set_syscall_pt_regs(pointer_arg(1))
@_SYSCALL_PRCTL_NAME
@_SYSCALL_PRCTL_REGARGS
@_SYSCALL_PRCTL_ARGSTR
},
{
%( @_IS_SREG_KERNEL %? @_SYSCALL_PRCTL_REGARGS_STORE %)
}
/* kernel 3.5+, but undesirable because it affects all syscalls */
probe tp_syscall.prctl = kernel.trace("sys_enter")
{
__set_syscall_pt_regs($regs)
@__syscall_compat_gate(@const("__NR_prctl"), @const("__NR_compat_prctl"))
@_SYSCALL_PRCTL_NAME
@_SYSCALL_PRCTL_REGARGS
@_SYSCALL_PRCTL_ARGSTR
},
{
%( @_IS_SREG_KERNEL %? @_SYSCALL_PRCTL_REGARGS_STORE %)
}
probe nd_syscall.prctl.return = nd1_syscall.prctl.return!, nd2_syscall.prctl.return!, tp_syscall.prctl.return
{ }
probe nd1_syscall.prctl.return = kprobe.function("sys_prctl").return ?
{
@_SYSCALL_PRCTL_NAME
@SYSC_RETVALSTR(returnval())
}
/* kernel 4.17+ */
probe nd2_syscall.prctl.return = kprobe.function(@arch_syscall_prefix "sys_prctl").return ?
{
@_SYSCALL_PRCTL_NAME
@SYSC_RETVALSTR(returnval())
}
/* kernel 3.5+, but undesirable because it affects all syscalls */
probe tp_syscall.prctl.return = kernel.trace("sys_exit")
{
__set_syscall_pt_regs($regs)
@__syscall_compat_gate(@const("__NR_prctl"), @const("__NR_compat_prctl"))
@_SYSCALL_PRCTL_NAME
@SYSC_RETVALSTR($ret)
}
|
