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# fstat ______________________________________________________
# long sys_fstat(unsigned int fd, struct __old_kernel_stat __user * statbuf)
# long sys_fstat64(unsigned long fd, struct stat64 __user * statbuf)
# long sys32_fstat64(unsigned int fd, struct stat64 __user *statbuf)
# long sys_newfstat(unsigned int fd, struct stat __user * statbuf)
# long sys_oabi_fstat64(char __user * filename,
# struct oldabi_stat64 __user * statbuf)
# long compat_sys_newfstat(unsigned int fd, struct compat_stat __user * statbuf)
#
@define _SYSCALL_FSTAT_NAME
%(
name = "fstat"
%)
@define _SYSCALL_FSTAT_ARGSTR
%(
argstr = sprintf("%d, %p", filedes, buf_uaddr)
%)
@define _SYSCALL_FSTAT_REGARGS
%(
filedes = int_arg(1)
buf_uaddr = pointer_arg(2)
%)
@define _SYSCALL_FSTAT_REGARGS_STORE
%(
if (@probewrite(filedes))
set_int_arg(1, filedes)
if (@probewrite(buf_uaddr))
set_pointer_arg(2, buf_uaddr)
%)
probe syscall.fstat = dw_syscall.fstat !, nd_syscall.fstat ? {}
probe syscall.fstat.return = dw_syscall.fstat.return !, nd_syscall.fstat.return ? {}
# dw_fstat _____________________________________________________
probe dw_syscall.fstat = kernel.function("sys_fstat").call ?,
kernel.function("sys_fstat64").call ?,
kernel.function("sys32_fstat64").call ?,
kernel.function("sys_newfstat").call ?,
kernel.function("sys_oabi_fstat64").call ?,
kernel.function("sys_oabi_fstat64").call ?,
%( arch == "s390" %?
kernel.function("compat_sys_s390_fstat64").call ?,
%)
%( arch == "x86_64" %?
kernel.function("compat_sys_x86_fstat64").call ?,
%)
kernel.function("compat_sys_newfstat").call ?
{
@_SYSCALL_FSTAT_NAME
filedes = __int32($fd)
buf_uaddr = $statbuf
@_SYSCALL_FSTAT_ARGSTR
}
probe dw_syscall.fstat.return = kernel.function("sys_fstat").return ?,
kernel.function("sys_fstat64").return ?,
kernel.function("sys32_fstat64").return ?,
kernel.function("sys_newfstat").return ?,
kernel.function("sys_oabi_fstat64").return ?,
%( arch == "s390" %?
kernel.function("compat_sys_s390_fstat64").return ?,
%)
%( arch == "x86_64" %?
kernel.function("compat_sys_x86_fstat64").return ?,
%)
kernel.function("compat_sys_newfstat").return ?
{
@_SYSCALL_FSTAT_NAME
@SYSC_RETVALSTR($return)
}
# nd_fstat _____________________________________________________
probe nd_syscall.fstat = nd1_syscall.fstat!, nd2_syscall.fstat!, tp_syscall.fstat
{ }
probe nd1_syscall.fstat = kprobe.function("sys_fstat") ?,
kprobe.function("sys_fstat64") ?,
kprobe.function("sys32_fstat64") ?,
kprobe.function("sys_newfstat") ?,
kprobe.function("sys_oabi_fstat64") ?,
%( arch == "s390" %?
kprobe.function("compat_sys_s390_fstat64") ?,
%)
%( arch == "x86_64" %?
kprobe.function("compat_sys_x86_fstat64") ?,
%)
kprobe.function("compat_sys_newfstat") ?
{
@_SYSCALL_FSTAT_NAME
asmlinkage()
@_SYSCALL_FSTAT_REGARGS
@_SYSCALL_FSTAT_ARGSTR
}
/* kernel 4.17+ */
probe nd2_syscall.fstat =
kprobe.function(@arch_syscall_prefix "sys_fstat") ?,
kprobe.function(@arch_syscall_prefix "sys_newfstat") ?,
kprobe.function(@arch_syscall_prefix "compat_sys_newfstat") ?,
kprobe.function(@arch_syscall_prefix "compat_sys_x86_fstat64") ?
{
__set_syscall_pt_regs(pointer_arg(1))
@_SYSCALL_FSTAT_NAME
@_SYSCALL_FSTAT_REGARGS
@_SYSCALL_FSTAT_ARGSTR
},
{
@_SYSCALL_FSTAT_REGARGS_STORE
}
/* kernel 3.5+, but undesirable because it affects all syscalls */
probe tp_syscall.fstat = __tp_syscall.fstat,
__tp_syscall.fstat64,
__tp_syscall.newfstat
{
__set_syscall_pt_regs($regs)
@_SYSCALL_FSTAT_NAME
@_SYSCALL_FSTAT_REGARGS
@_SYSCALL_FSTAT_ARGSTR
},
{
@_SYSCALL_FSTAT_REGARGS_STORE
}
probe __tp_syscall.fstat = kernel.trace("sys_enter")
{
@__syscall_compat_gate(@const("__NR_oldfstat"), @const("__NR_compat_oldfstat"))
}
probe __tp_syscall.fstat64 = kernel.trace("sys_enter")
{
@__syscall_compat_gate(@const("__NR_fstat64"), @const("__NR_compat_fstat64"))
}
probe __tp_syscall.newfstat = kernel.trace("sys_enter")
{
@__syscall_compat_gate(@const("__NR_fstat"), @const("__NR_compat_fstat"))
}
probe nd_syscall.fstat.return = nd1_syscall.fstat.return!, nd2_syscall.fstat.return!, tp_syscall.fstat.return
{ }
probe nd1_syscall.fstat.return = kprobe.function("sys_fstat").return ?,
kprobe.function("sys_fstat64").return ?,
kprobe.function("sys32_fstat64").return ?,
kprobe.function("sys_newfstat").return ?,
kprobe.function("sys_oabi_fstat64").return ?,
%( arch == "s390" %?
kprobe.function("compat_sys_s390_fstat64").return ?,
%)
%( arch == "x86_64" %?
kprobe.function("compat_sys_x86_fstat64").return ?,
%)
kprobe.function("compat_sys_newfstat").return ?
{
@_SYSCALL_FSTAT_NAME
@SYSC_RETVALSTR(returnval())
}
/* kernel 4.17+ */
probe nd2_syscall.fstat.return =
kprobe.function(@arch_syscall_prefix "sys_fstat").return ?,
kprobe.function(@arch_syscall_prefix "sys_newfstat").return ?,
kprobe.function(@arch_syscall_prefix "compat_sys_newfstat").return ?,
kprobe.function(@arch_syscall_prefix "compat_sys_x86_fstat64").return ?
{
@_SYSCALL_FSTAT_NAME
@SYSC_RETVALSTR(returnval())
}
/* kernel 3.5+, but undesirable because it affects all syscalls */
probe tp_syscall.fstat.return = __tp_syscall.fstat.return,
__tp_syscall.fstat64.return,
__tp_syscall.newfstat.return
{
__set_syscall_pt_regs($regs)
@_SYSCALL_FSTAT_NAME
@SYSC_RETVALSTR($ret)
}
probe __tp_syscall.fstat.return = kernel.trace("sys_exit")
{
@__syscall_compat_gate(@const("__NR_oldfstat"), @const("__NR_compat_oldfstat"))
}
probe __tp_syscall.fstat64.return = kernel.trace("sys_exit")
{
@__syscall_compat_gate(@const("__NR_fstat64"), @const("__NR_compat_fstat64"))
}
probe __tp_syscall.newfstat.return = kernel.trace("sys_exit")
{
@__syscall_compat_gate(@const("__NR_fstat"), @const("__NR_compat_fstat"))
}