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# membarrier _______________________________________________________
# SYSCALL_DEFINE2(membarrier, int, cmd, int, flags)
@define _SYSCALL_MEMBARRIER_NAME
%(
name = "membarrier"
%)
@define _SYSCALL_MEMBARRIER_ARGSTR
%(
argstr = sprintf("%s, %d", cmd_str, flags)
%)
@define _SYSCALL_MEMBARRIER_REGARGS
%(
cmd = int_arg(1)
cmd_str = _membarrier_cmd_str(cmd)
flags = int_arg(2)
%)
@define _SYSCALL_MEMBARRIER_REGARGS_STORE
%(
if (@probewrite(cmd))
set_int_arg(1, cmd)
if (@probewrite(flags))
set_int_arg(2, flags)
%)
probe syscall.membarrier = dw_syscall.membarrier !, nd_syscall.membarrier ? {}
probe syscall.membarrier.return = dw_syscall.membarrier.return !,
nd_syscall.membarrier.return ? {}
# dw_membarrier _____________________________________________________
probe dw_syscall.membarrier = kernel.function("sys_membarrier").call ?
{
@_SYSCALL_MEMBARRIER_NAME
cmd = __int32($cmd)
cmd_str = _membarrier_cmd_str(cmd)
flags = __int32($flags)
@_SYSCALL_MEMBARRIER_ARGSTR
}
probe dw_syscall.membarrier.return = kernel.function("sys_membarrier").return ?
{
@_SYSCALL_MEMBARRIER_NAME
@SYSC_RETVALSTR($return)
}
# nd_membarrier _____________________________________________________
probe nd_syscall.membarrier = nd1_syscall.membarrier!, nd2_syscall.membarrier!, tp_syscall.membarrier
{ }
probe nd1_syscall.membarrier = kprobe.function("sys_membarrier").call ?
{
@_SYSCALL_MEMBARRIER_NAME
asmlinkage()
@_SYSCALL_MEMBARRIER_REGARGS
@_SYSCALL_MEMBARRIER_ARGSTR
}
/* kernel 4.17+ */
probe nd2_syscall.membarrier = kprobe.function(@arch_syscall_prefix "sys_membarrier") ?
{
__set_syscall_pt_regs(pointer_arg(1))
@_SYSCALL_MEMBARRIER_NAME
@_SYSCALL_MEMBARRIER_REGARGS
@_SYSCALL_MEMBARRIER_ARGSTR
},
{
%( @_IS_SREG_KERNEL %? @_SYSCALL_MEMBARRIER_REGARGS_STORE %)
}
/* kernel 3.5+, but undesirable because it affects all syscalls */
probe tp_syscall.membarrier = kernel.trace("sys_enter")
{
__set_syscall_pt_regs($regs)
@__syscall_compat_gate(@const("__NR_membarrier"), @const("__NR_compat_membarrier"))
@_SYSCALL_MEMBARRIER_NAME
@_SYSCALL_MEMBARRIER_REGARGS
@_SYSCALL_MEMBARRIER_ARGSTR
},
{
%( @_IS_SREG_KERNEL %? @_SYSCALL_MEMBARRIER_REGARGS_STORE %)
}
probe nd_syscall.membarrier.return = nd1_syscall.membarrier.return!, nd2_syscall.membarrier.return!, tp_syscall.membarrier.return
{ }
probe nd1_syscall.membarrier.return = kprobe.function("sys_membarrier").return ?
{
@_SYSCALL_MEMBARRIER_NAME
@SYSC_RETVALSTR(returnval())
}
/* kernel 4.17+ */
probe nd2_syscall.membarrier.return = kprobe.function(@arch_syscall_prefix "sys_membarrier").return ?
{
@_SYSCALL_MEMBARRIER_NAME
@SYSC_RETVALSTR(returnval())
}
/* kernel 3.5+, but undesirable because it affects all syscalls */
probe tp_syscall.membarrier.return = kernel.trace("sys_exit")
{
__set_syscall_pt_regs($regs)
@__syscall_compat_gate(@const("__NR_membarrier"), @const("__NR_compat_membarrier"))
@_SYSCALL_MEMBARRIER_NAME
@SYSC_RETVALSTR($ret)
}
|
