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# msync ______________________________________________________
# long sys_msync(unsigned long start, size_t len, int flags)
@define _SYSCALL_MSYNC_NAME
%(
name = "msync"
%)
@define _SYSCALL_MSYNC_ARGSTR
%(
argstr = sprintf("%p, %u, %s", start, length, flags_str)
%)
@define _SYSCALL_MSYNC_REGARGS
%(
start = ulong_arg(1)
length = ulong_arg(2)
flags = int_arg(3)
flags_str = _msync_flag_str(flags)
%)
@define _SYSCALL_MSYNC_REGARGS_STORE
%(
if (@probewrite(start))
set_ulong_arg(1, start)
if (@probewrite(length))
set_ulong_arg(2, length)
if (@probewrite(flags))
set_int_arg(3, flags)
%)
probe syscall.msync = dw_syscall.msync !, nd_syscall.msync ? {}
probe syscall.msync.return = dw_syscall.msync.return !,
nd_syscall.msync.return ? {}
# dw_msync _____________________________________________________
probe dw_syscall.msync = kernel.function("sys_msync").call ?
{
@_SYSCALL_MSYNC_NAME
start = $start
length = __ulong($len)
flags = __int32($flags)
flags_str = _msync_flag_str(flags)
@_SYSCALL_MSYNC_ARGSTR
}
probe dw_syscall.msync.return = kernel.function("sys_msync").return ?
{
@_SYSCALL_MSYNC_NAME
@SYSC_RETVALSTR($return)
}
# nd_msync _____________________________________________________
probe nd_syscall.msync = nd1_syscall.msync!, nd2_syscall.msync!, tp_syscall.msync
{ }
probe nd1_syscall.msync = kprobe.function("sys_msync") ?
{
@_SYSCALL_MSYNC_NAME
asmlinkage()
@_SYSCALL_MSYNC_REGARGS
@_SYSCALL_MSYNC_ARGSTR
}
/* kernel 4.17+ */
probe nd2_syscall.msync = kprobe.function(@arch_syscall_prefix "sys_msync") ?
{
__set_syscall_pt_regs(pointer_arg(1))
@_SYSCALL_MSYNC_NAME
@_SYSCALL_MSYNC_REGARGS
@_SYSCALL_MSYNC_ARGSTR
},
{
%( @_IS_SREG_KERNEL %? @_SYSCALL_MSYNC_REGARGS_STORE %)
}
/* kernel 3.5+, but undesirable because it affects all syscalls */
probe tp_syscall.msync = kernel.trace("sys_enter")
{
__set_syscall_pt_regs($regs)
@__syscall_compat_gate(@const("__NR_msync"), @const("__NR_compat_msync"))
@_SYSCALL_MSYNC_NAME
@_SYSCALL_MSYNC_REGARGS
@_SYSCALL_MSYNC_ARGSTR
},
{
%( @_IS_SREG_KERNEL %? @_SYSCALL_MSYNC_REGARGS_STORE %)
}
probe nd_syscall.msync.return = nd1_syscall.msync.return!, nd2_syscall.msync.return!, tp_syscall.msync.return
{ }
probe nd1_syscall.msync.return = kprobe.function("sys_msync").return ?
{
@_SYSCALL_MSYNC_NAME
@SYSC_RETVALSTR(returnval())
}
/* kernel 4.17+ */
probe nd2_syscall.msync.return = kprobe.function(@arch_syscall_prefix "sys_msync").return ?
{
@_SYSCALL_MSYNC_NAME
@SYSC_RETVALSTR(returnval())
}
/* kernel 3.5+, but undesirable because it affects all syscalls */
probe tp_syscall.msync.return = kernel.trace("sys_exit")
{
__set_syscall_pt_regs($regs)
@__syscall_compat_gate(@const("__NR_msync"), @const("__NR_compat_msync"))
@_SYSCALL_MSYNC_NAME
@SYSC_RETVALSTR($ret)
}
|
