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# fallocate __________________________________________________
#
# COMPAT_SYSCALL_DEFINE6(x86_fallocate, int, fd, int, mode,
# unsigned int, offset_lo, unsigned int, offset_hi,
# unsigned int, len_lo, unsigned int, len_hi)
# asmlinkage long sys32_fallocate(int fd, int mode, unsigned offset_lo,
# unsigned offset_hi, unsigned len_lo,
# unsigned len_hi)
@define _SYSCALL_COMPAT_FALLOCATE_NAME
%(
name = "fallocate"
%)
@define _SYSCALL_COMPAT_FALLOCATE_ARGSTR
%(
argstr = sprintf("%d, %s, %#x, %u", fd, mode_str, offset, len)
%)
@define _SYSCALL_COMPAT_FALLOCATE_REGARGS
%(
fd = int_arg(1)
mode = int_arg(2)
mode_str = _stp_fallocate_mode_str(mode)
offset = ((uint_arg(4) << 32) | uint_arg(3))
len = ((uint_arg(6) << 32) | uint_arg(5))
%)
@define _SYSCALL_COMPAT_FALLOCATE_REGARGS_STORE
%(
if (@probewrite(fd))
set_int_arg(1, fd)
if (@probewrite(mode))
set_int_arg(2, mode)
if (@probewrite(offset)) {
set_uint_arg(3, offset & 0xffffffff)
set_uint_arg(4, offset >> 32)
}
if (@probewrite(len)) {
set_uint_arg(5, len & 0xffffffff)
set_uint_arg(6, len >> 32)
}
%)
probe syscall.compat_fallocate = dw_syscall.compat_fallocate !,
nd_syscall.compat_fallocate ? {}
probe syscall.compat_fallocate.return = dw_syscall.compat_fallocate.return !,
nd_syscall.compat_fallocate.return ? {}
# dw_compat_fallocate _____________________________________________________
probe dw_syscall.compat_fallocate = kernel.function("sys32_fallocate").call ?,
kernel.function("comapt_sys_x86_fallocate").call ?
{
@_SYSCALL_COMPAT_FALLOCATE_NAME
fd = __int32($fd)
mode = __int32($mode)
mode_str = _stp_fallocate_mode_str(mode)
offset = (($offset_hi << 32) | $offset_lo)
len = (($len_hi << 32) | $len_lo)
@_SYSCALL_COMPAT_FALLOCATE_ARGSTR
}
probe dw_syscall.compat_fallocate.return =
kernel.function("sys32_fallocate").return ?,
kernel.function("compat_sys_x86_fallocate").return ?
{
@_SYSCALL_COMPAT_FALLOCATE_NAME
@SYSC_RETVALSTR($return)
}
# nd_compat_fallocate _____________________________________________________
probe nd_syscall.compat_fallocate = nd1_syscall.compat_fallocate!, nd2_syscall.compat_fallocate!, tp_syscall.compat_fallocate
{ }
probe nd1_syscall.compat_fallocate = kprobe.function("sys32_fallocate") ?,
kprobe.function("compat_sys_x86_fallocate") ?
{
asmlinkage()
@_SYSCALL_COMPAT_FALLOCATE_NAME
@_SYSCALL_COMPAT_FALLOCATE_REGARGS
@_SYSCALL_COMPAT_FALLOCATE_ARGSTR
}
/* kernel 4.17+ */
probe nd2_syscall.compat_fallocate =
kprobe.function(@arch_syscall_prefix "compat_sys_x86_fallocate") ?
{
__set_syscall_pt_regs(pointer_arg(1))
@_SYSCALL_COMPAT_FALLOCATE_NAME
@_SYSCALL_COMPAT_FALLOCATE_REGARGS
@_SYSCALL_COMPAT_FALLOCATE_ARGSTR
},
{
%( @_IS_SREG_KERNEL %? @_SYSCALL_COMPAT_FALLOCATE_REGARGS_STORE %)
}
/* kernel 3.5+, but undesirable because it affects all syscalls */
probe tp_syscall.compat_fallocate = kernel.trace("sys_enter")
{
__set_syscall_pt_regs($regs)
@__compat_syscall_gate(@const("__NR_ia32_fallocate"))
@_SYSCALL_COMPAT_FALLOCATE_NAME
@_SYSCALL_COMPAT_FALLOCATE_REGARGS
@_SYSCALL_COMPAT_FALLOCATE_ARGSTR
},
{
%( @_IS_SREG_KERNEL %? @_SYSCALL_COMPAT_FALLOCATE_REGARGS_STORE %)
}
probe nd_syscall.compat_fallocate.return = nd1_syscall.compat_fallocate.return!, nd2_syscall.compat_fallocate.return!, tp_syscall.compat_fallocate.return
{ }
probe nd1_syscall.compat_fallocate.return =
kprobe.function("sys32_fallocate").return ?,
kprobe.function("compat_sys_x86_fallocate").return ?
{
@_SYSCALL_COMPAT_FALLOCATE_NAME
@SYSC_RETVALSTR(returnval())
}
/* kernel 4.17+ */
probe nd2_syscall.compat_fallocate.return =
kprobe.function(@arch_syscall_prefix "compat_sys_x86_fallocate").return ?
{
@_SYSCALL_COMPAT_FALLOCATE_NAME
@SYSC_RETVALSTR(returnval())
}
/* kernel 3.5+, but undesirable because it affects all syscalls */
probe tp_syscall.compat_fallocate.return = kernel.trace("sys_exit")
{
__set_syscall_pt_regs($regs)
@__compat_syscall_gate(@const("__NR_ia32_fallocate"))
@_SYSCALL_COMPAT_FALLOCATE_NAME
@SYSC_RETVALSTR($ret)
}
|
