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# fremovexattr _______________________________________________
# long sys_fremovexattr(int fd, char __user *name)
@define _SYSCALL_FREMOVEXATTR_NAME
%(
name = "fremovexattr"
%)
@define _SYSCALL_FREMOVEXATTR_ARGSTR
%(
argstr = sprintf("%d, %s", filedes, name_str)
%)
@define _SYSCALL_FREMOVEXATTR_REGARGS
%(
filedes = int_arg(1)
name_uaddr = pointer_arg(2)
name_str = user_string_quoted(pointer_arg(2))
name_str_unquoted = user_string_nofault(pointer_arg(2))
%)
@define _SYSCALL_FREMOVEXATTR_REGARGS_STORE
%(
if (@probewrite(filedes))
set_int_arg(1, filedes)
if (@probewrite(name_uaddr))
set_pointer_arg(2, name_uaddr)
if (@probewrite(name_str_unquoted))
set_user_string_arg(pointer_arg(2), name_str_unquoted)
%)
probe syscall.fremovexattr = dw_syscall.fremovexattr !, nd_syscall.fremovexattr ? {}
probe syscall.fremovexattr.return = dw_syscall.fremovexattr.return !, nd_syscall.fremovexattr.return ? {}
# dw_fremovexattr _____________________________________________________
probe dw_syscall.fremovexattr = kernel.function("sys_fremovexattr").call
{
@_SYSCALL_FREMOVEXATTR_NAME
filedes = __int32($fd)
name_uaddr = $name
name_str = user_string_quoted($name)
@_SYSCALL_FREMOVEXATTR_ARGSTR
}
probe dw_syscall.fremovexattr.return = kernel.function("sys_fremovexattr").return
{
@_SYSCALL_FREMOVEXATTR_NAME
@SYSC_RETVALSTR($return)
}
# nd_fremovexattr _____________________________________________________
probe nd_syscall.fremovexattr = nd1_syscall.fremovexattr!, nd2_syscall.fremovexattr!, tp_syscall.fremovexattr
{ }
probe nd1_syscall.fremovexattr = kprobe.function("sys_fremovexattr") ?
{
@_SYSCALL_FREMOVEXATTR_NAME
asmlinkage()
@_SYSCALL_FREMOVEXATTR_REGARGS
@_SYSCALL_FREMOVEXATTR_ARGSTR
}
/* kernel 4.17+ */
probe nd2_syscall.fremovexattr = kprobe.function(@arch_syscall_prefix "sys_fremovexattr") ?
{
__set_syscall_pt_regs(pointer_arg(1))
@_SYSCALL_FREMOVEXATTR_NAME
@_SYSCALL_FREMOVEXATTR_REGARGS
@_SYSCALL_FREMOVEXATTR_ARGSTR
},
{
@_SYSCALL_FREMOVEXATTR_REGARGS_STORE
}
/* kernel 3.5+, but undesirable because it affects all syscalls */
probe tp_syscall.fremovexattr = kernel.trace("sys_enter")
{
__set_syscall_pt_regs($regs)
@__syscall_compat_gate(@const("__NR_fremovexattr"), @const("__NR_compat_fremovexattr"))
@_SYSCALL_FREMOVEXATTR_NAME
@_SYSCALL_FREMOVEXATTR_REGARGS
@_SYSCALL_FREMOVEXATTR_ARGSTR
},
{
@_SYSCALL_FREMOVEXATTR_REGARGS_STORE
}
probe nd_syscall.fremovexattr.return = nd1_syscall.fremovexattr.return!, nd2_syscall.fremovexattr.return!, tp_syscall.fremovexattr.return
{ }
probe nd1_syscall.fremovexattr.return = kprobe.function("sys_fremovexattr").return ?
{
@_SYSCALL_FREMOVEXATTR_NAME
@SYSC_RETVALSTR(returnval())
}
/* kernel 4.17+ */
probe nd2_syscall.fremovexattr.return = kprobe.function(@arch_syscall_prefix "sys_fremovexattr").return ?
{
@_SYSCALL_FREMOVEXATTR_NAME
@SYSC_RETVALSTR(returnval())
}
/* kernel 3.5+, but undesirable because it affects all syscalls */
probe tp_syscall.fremovexattr.return = kernel.trace("sys_exit")
{
__set_syscall_pt_regs($regs)
@__syscall_compat_gate(@const("__NR_fremovexattr"), @const("__NR_compat_fremovexattr"))
@_SYSCALL_FREMOVEXATTR_NAME
@SYSC_RETVALSTR($ret)
}
|
