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# request_key ________________________________________________
#
# long sys_request_key(const char __user *_type,
# const char __user *_description,
# const char __user *_callout_info,
# key_serial_t destringid)
# compat_sys_request_key() calls sys_request_key, so don't need probe there.
#
@define _SYSCALL_REQUEST_KEY_NAME
%(
name = "request_key"
%)
@define _SYSCALL_REQUEST_KEY_ARGSTR
%(
argstr = sprintf("%s, %s, %p, %d", type_str, description_str,
callout_info_uaddr, destringid)
%)
@define _SYSCALL_REQUEST_KEY_REGARGS
%(
type_uaddr = pointer_arg(1)
type_str = user_string_quoted(type_uaddr)
description_uaddr = pointer_arg(2)
description_str = user_string_quoted(description_uaddr)
callout_info_uaddr = pointer_arg(3)
destringid = int_arg(4)
%)
probe syscall.request_key = dw_syscall.request_key !, nd_syscall.request_key ? {}
probe syscall.request_key.return = dw_syscall.request_key.return !,
nd_syscall.request_key.return ? {}
# dw_request_key _____________________________________________________
probe dw_syscall.request_key = kernel.function("sys_request_key").call ?
{
@_SYSCALL_REQUEST_KEY_NAME
type_uaddr = $_type
type_str = user_string_quoted(type_uaddr)
description_uaddr = $_description
description_str = user_string_quoted(description_uaddr)
callout_info_uaddr = $_callout_info
destringid = __int32($destringid)
@_SYSCALL_REQUEST_KEY_ARGSTR
}
probe dw_syscall.request_key.return = kernel.function("sys_request_key").return ?
{
@_SYSCALL_REQUEST_KEY_NAME
@SYSC_RETVALSTR($return)
}
# nd_request_key _____________________________________________________
probe nd_syscall.request_key = nd1_syscall.request_key!, nd2_syscall.request_key!, tp_syscall.request_key
{ }
probe nd1_syscall.request_key = kprobe.function("sys_request_key") ?
{
@_SYSCALL_REQUEST_KEY_NAME
asmlinkage()
@_SYSCALL_REQUEST_KEY_REGARGS
@_SYSCALL_REQUEST_KEY_ARGSTR
}
/* kernel 4.17+ */
probe nd2_syscall.request_key = kprobe.function(@arch_syscall_prefix "sys_request_key") ?
{
__set_syscall_pt_regs(pointer_arg(1))
@_SYSCALL_REQUEST_KEY_NAME
@_SYSCALL_REQUEST_KEY_REGARGS
@_SYSCALL_REQUEST_KEY_ARGSTR
}
/* kernel 3.5+, but undesirable because it affects all syscalls */
probe tp_syscall.request_key = kernel.trace("sys_enter")
{
__set_syscall_pt_regs($regs)
@__syscall_compat_gate(@const("__NR_request_key"), @const("__NR_compat_request_key"))
@_SYSCALL_REQUEST_KEY_NAME
@_SYSCALL_REQUEST_KEY_REGARGS
@_SYSCALL_REQUEST_KEY_ARGSTR
}
probe nd_syscall.request_key.return = nd1_syscall.request_key.return!, nd2_syscall.request_key.return!, tp_syscall.request_key.return
{ }
probe nd1_syscall.request_key.return = kprobe.function("sys_request_key").return ?
{
@_SYSCALL_REQUEST_KEY_NAME
@SYSC_RETVALSTR(returnval())
}
/* kernel 4.17+ */
probe nd2_syscall.request_key.return = kprobe.function(@arch_syscall_prefix "sys_request_key").return ?
{
@_SYSCALL_REQUEST_KEY_NAME
@SYSC_RETVALSTR(returnval())
}
/* kernel 3.5+, but undesirable because it affects all syscalls */
probe tp_syscall.request_key.return = kernel.trace("sys_exit")
{
__set_syscall_pt_regs($regs)
@__syscall_compat_gate(@const("__NR_request_key"), @const("__NR_compat_request_key"))
@_SYSCALL_REQUEST_KEY_NAME
@SYSC_RETVALSTR($ret)
}
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