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# fchmod _____________________________________________________
# long sys_fchmod(unsigned int fd, mode_t mode)
@define _SYSCALL_FCHMOD_NAME
%(
name = "fchmod"
%)
@define _SYSCALL_FCHMOD_ARGSTR
%(
argstr = sprintf("%d, %#o", fildes, mode)
%)
@define _SYSCALL_FCHMOD_REGARGS
%(
fildes = int_arg(1)
mode = uint_arg(2)
%)
probe syscall.fchmod = dw_syscall.fchmod !, nd_syscall.fchmod ? {}
probe syscall.fchmod.return = dw_syscall.fchmod.return !, nd_syscall.fchmod.return ? {}
# dw_fchmod _____________________________________________________
probe dw_syscall.fchmod = kernel.function("sys_fchmod").call
{
@_SYSCALL_FCHMOD_NAME
fildes = __int32($fd)
%( arch == "i386" %?
# Why @cast() here? Even though the user passes an unsigned
# int (32-bits), some kernels (2.6.32-431.el6.i686) get an
# unsigned short (16-bits).
mode = @uint_cast(&$mode)
%:
mode = __uint32($mode)
%)
@_SYSCALL_FCHMOD_ARGSTR
}
probe dw_syscall.fchmod.return = kernel.function("sys_fchmod").return
{
@_SYSCALL_FCHMOD_NAME
@SYSC_RETVALSTR($return)
}
# nd_fchmod _____________________________________________________
probe nd_syscall.fchmod = nd1_syscall.fchmod!, nd2_syscall.fchmod!, tp_syscall.fchmod
{ }
probe nd1_syscall.fchmod = kprobe.function("sys_fchmod") ?
{
@_SYSCALL_FCHMOD_NAME
asmlinkage()
@_SYSCALL_FCHMOD_REGARGS
@_SYSCALL_FCHMOD_ARGSTR
}
/* kernel 4.17+ */
probe nd2_syscall.fchmod = kprobe.function(@arch_syscall_prefix "sys_fchmod") ?
{
__set_syscall_pt_regs(pointer_arg(1))
@_SYSCALL_FCHMOD_NAME
@_SYSCALL_FCHMOD_REGARGS
@_SYSCALL_FCHMOD_ARGSTR
}
/* kernel 3.5+, but undesirable because it affects all syscalls */
probe tp_syscall.fchmod = kernel.trace("sys_enter")
{
__set_syscall_pt_regs($regs)
@__syscall_compat_gate(@const("__NR_fchmod"), @const("__NR_compat_fchmod"))
@_SYSCALL_FCHMOD_NAME
@_SYSCALL_FCHMOD_REGARGS
@_SYSCALL_FCHMOD_ARGSTR
}
probe nd_syscall.fchmod.return = nd1_syscall.fchmod.return!, nd2_syscall.fchmod.return!, tp_syscall.fchmod.return
{ }
probe nd1_syscall.fchmod.return = kprobe.function("sys_fchmod").return ?
{
@_SYSCALL_FCHMOD_NAME
@SYSC_RETVALSTR(returnval())
}
/* kernel 4.17+ */
probe nd2_syscall.fchmod.return = kprobe.function(@arch_syscall_prefix "sys_fchmod").return ?
{
@_SYSCALL_FCHMOD_NAME
@SYSC_RETVALSTR(returnval())
}
/* kernel 3.5+, but undesirable because it affects all syscalls */
probe tp_syscall.fchmod.return = kernel.trace("sys_exit")
{
__set_syscall_pt_regs($regs)
@__syscall_compat_gate(@const("__NR_fchmod"), @const("__NR_compat_fchmod"))
@_SYSCALL_FCHMOD_NAME
@SYSC_RETVALSTR($ret)
}
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