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# mount ______________________________________________________
# long sys_mount(char __user * dev_name,
# char __user * dir_name,
# char __user * type,
# unsigned long flags,
# void __user * data)
# long compat_sys_mount(char __user * dev_name,
# char __user * dir_name,
# char __user * type,
# unsigned long flags,
# void __user * data)
@define _SYSCALL_MOUNT_NAME
%(
name = "mount"
%)
@define _SYSCALL_MOUNT_ARGSTR
%(
argstr = sprintf("%s, %s, %s, %s, %s",
source, target, filesystemtype, mountflags_str, data)
%)
@define _SYSCALL_MOUNT_REGARGS
%(
source = user_string_quoted(pointer_arg(1))
target = user_string_quoted(pointer_arg(2))
filesystemtype = user_string_quoted(pointer_arg(3))
mountflags = ulong_arg(4)
mountflags_str = _mountflags_str(mountflags)
data = user_string_n_quoted(pointer_arg(5), syscall_string_trunc)
%)
probe syscall.mount = dw_syscall.mount !, nd_syscall.mount ? {}
probe syscall.mount.return = dw_syscall.mount.return !, nd_syscall.mount.return ? {}
# dw_mount _____________________________________________________
probe dw_syscall.mount = kernel.function("compat_sys_mount").call ?,
kernel.function("sys_mount").call
{
@_SYSCALL_MOUNT_NAME
source = user_string_quoted(@__pointer($dev_name))
target = user_string_quoted(@__pointer($dir_name))
filesystemtype = user_string_quoted(@__pointer($type))
mountflags = @__compat_ulong($flags)
mountflags_str = _mountflags_str(mountflags)
data = user_string_n_quoted(@__pointer($data), syscall_string_trunc)
@_SYSCALL_MOUNT_ARGSTR
}
probe dw_syscall.mount.return = kernel.function("compat_sys_mount").return ?,
kernel.function("sys_mount").return
{
@_SYSCALL_MOUNT_NAME
@SYSC_RETVALSTR($return)
}
# nd_mount _____________________________________________________
probe nd_syscall.mount = nd1_syscall.mount!, nd2_syscall.mount!, tp_syscall.mount
{ }
probe nd1_syscall.mount = kprobe.function("compat_sys_mount") ?,
kprobe.function("sys_mount") ?
{
@_SYSCALL_MOUNT_NAME
asmlinkage()
@_SYSCALL_MOUNT_REGARGS
@_SYSCALL_MOUNT_ARGSTR
}
/* kernel 4.17+ */
probe nd2_syscall.mount = kprobe.function(@arch_syscall_prefix "sys_mount") ?,
kprobe.function(@arch_syscall_prefix "compat_sys_mount") ?
{
__set_syscall_pt_regs(pointer_arg(1))
@_SYSCALL_MOUNT_NAME
@_SYSCALL_MOUNT_REGARGS
@_SYSCALL_MOUNT_ARGSTR
}
/* kernel 3.5+, but undesirable because it affects all syscalls */
probe tp_syscall.mount = kernel.trace("sys_enter")
{
__set_syscall_pt_regs($regs)
@__syscall_compat_gate(@const("__NR_mount"), @const("__NR_compat_mount"))
@_SYSCALL_MOUNT_NAME
@_SYSCALL_MOUNT_REGARGS
@_SYSCALL_MOUNT_ARGSTR
}
probe nd_syscall.mount.return = nd1_syscall.mount.return!, nd2_syscall.mount.return!, tp_syscall.mount.return
{ }
probe nd1_syscall.mount.return = kprobe.function("compat_sys_mount").return ?,
kprobe.function("sys_mount").return ?
{
@_SYSCALL_MOUNT_NAME
@SYSC_RETVALSTR(returnval())
}
/* kernel 4.17+ */
probe nd2_syscall.mount.return = kprobe.function(@arch_syscall_prefix "sys_mount").return ?,
kprobe.function(@arch_syscall_prefix "compat_sys_mount").return ?
{
@_SYSCALL_MOUNT_NAME
@SYSC_RETVALSTR(returnval())
}
/* kernel 3.5+, but undesirable because it affects all syscalls */
probe tp_syscall.mount.return = kernel.trace("sys_exit")
{
__set_syscall_pt_regs($regs)
@__syscall_compat_gate(@const("__NR_mount"), @const("__NR_compat_mount"))
@_SYSCALL_MOUNT_NAME
@SYSC_RETVALSTR($ret)
}
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