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# accept4 ____________________________________________________
#
# SYSCALL_DEFINE4(accept4, int, fd, struct sockaddr __user *, upeer_sockaddr,
# int __user *, upeer_addrlen, int, flags)
#
@define _SYSCALL_ACCEPT4_NAME
%(
name = "accept4"
%)
@define _SYSCALL_ACCEPT4_ARGSTR
%(
argstr = sprintf("%d, %p, %p, %s", sockfd, addr_uaddr, addrlen_uaddr,
flags_str)
%)
@define _SYSCALL_ACCEPT4_REGARGS
%(
sockfd = int_arg(1)
addr_uaddr = pointer_arg(2)
addrlen_uaddr = pointer_arg(3)
flags = int_arg(4)
%)
@define _SYSCALL_ACCEPT4_REGARGS_STORE
%(
if (@probewrite(sockfd))
set_int_arg(1, sockfd)
if (@probewrite(addr_uaddr))
set_pointer_arg(2, addr_uaddr)
if (@probewrite(addrlen_uaddr))
set_pointer_arg(3, addrlen_uaddr)
if (@probewrite(flags))
set_int_arg(4, flags)
%)
@define _SYSCALL_SOCKETCALL_ACCEPT4_REGARGS
%(
__argsl = &@ulong_cast(pointer_arg(2))
sockfd = __int32(user_ulong(&@ulong_cast(__argsl)[0]))
addr_uaddr = user_ulong(&@ulong_cast(__argsl)[1])
addrlen_uaddr = user_ulong(&@ulong_cast(__argsl)[2])
flags = __int32(user_ulong(&@ulong_cast(__argsl)[3]))
%)
@define _SYSCALL_COMPAT_SOCKETCALL_ACCEPT4_REGARGS
%(
__argsi = &@uint_cast(pointer_arg(2))
sockfd = user_int(&@uint_cast(__argsi)[0])
addr_uaddr = user_uint32(&@uint_cast(__argsi)[1])
addrlen_uaddr = user_uint32(&@uint_cast(__argsi)[2])
flags = user_int(&@uint_cast(__argsi)[3])
%)
probe syscall.accept4 = dw_syscall.accept4 !, nd_syscall.accept4 ? {}
probe syscall.accept4.return = dw_syscall.accept4.return !, nd_syscall.accept4.return ? {}
# dw_accept4 _____________________________________________________
probe dw_syscall.accept4 = __syscall.accept4 ?, __syscall.socketcall.accept4 ?,
__syscall.compat_socketcall.accept4 ?
{
@_SYSCALL_ACCEPT4_NAME
flags_str = _sock_flags_str(flags)
@_SYSCALL_ACCEPT4_ARGSTR
}
probe __syscall.accept4 = kernel.function("sys_accept4").call
{
// On all tested platforms, there wasn't a different syscall
// number for the compat version of accept4().
@__syscall_nr_gate(@const("__NR_accept4"))
sockfd = __int32($fd)
addr_uaddr = $upeer_sockaddr
addrlen_uaddr = $upeer_addrlen
flags = __int32($flags)
}
probe __syscall.socketcall.accept4 = kernel.function("sys_socketcall").call ?
{
if (__int32($call) != @const("SYS_ACCEPT4")) next;
sockfd = __int32(user_ulong(&@ulong_cast($args)[0]))
addr_uaddr = user_ulong(&@ulong_cast($args)[1])
addrlen_uaddr = user_ulong(&@ulong_cast($args)[2])
flags = __int32(user_ulong(&@ulong_cast($args)[3]))
}
probe __syscall.compat_socketcall.accept4 =
kernel.function("compat_sys_socketcall").call ?
{
if (__int32($call) != @const("SYS_ACCEPT4")) next;
sockfd = user_int(&@uint_cast($args)[0])
addr_uaddr = user_uint32(&@uint_cast($args)[1])
addrlen_uaddr = user_uint32(&@uint_cast($args)[2])
flags = user_int(&@uint_cast($args)[3])
}
probe dw_syscall.accept4.return = __syscall.accept4.return ?,
__syscall.socketcall.accept4.return ?
{
@_SYSCALL_ACCEPT4_NAME
@SYSC_RETVALSTR($return)
}
probe __syscall.accept4.return = kernel.function("sys_accept4").return ?
{
@__syscall_nr_gate(@const("__NR_accept4"))
}
probe __syscall.socketcall.accept4.return =
kernel.function("sys_socketcall").return ?,
kernel.function("compat_sys_socketcall").return ?
{
if (__int32(@entry($call)) != @const("SYS_ACCEPT4")) next;
}
# nd_accept4 _____________________________________________________
probe nd_syscall.accept4 = nd1_syscall.accept4!, nd2_syscall.accept4!, tp_syscall.accept4
{ }
probe nd1_syscall.accept4 = __nd1_syscall.accept4 ?,
__nd1_syscall.socketcall.accept4 ?,
__nd1_syscall.compat_socketcall.accept4 ?
{
@_SYSCALL_ACCEPT4_NAME
flags_str = _sock_flags_str(flags)
@_SYSCALL_ACCEPT4_ARGSTR
}
probe __nd1_syscall.accept4 = kprobe.function("sys_accept4").call
{
asmlinkage()
// On all tested platforms, there wasn't a different syscall
// number for the compat version of accept4().
@__syscall_nr_gate(@const("__NR_accept4"))
@_SYSCALL_ACCEPT4_REGARGS
}
probe __nd1_syscall.socketcall.accept4 = kprobe.function("sys_socketcall").call ?
{
asmlinkage()
if (int_arg(1) != @const("SYS_ACCEPT4")) next;
@_SYSCALL_SOCKETCALL_ACCEPT4_REGARGS
}
probe __nd1_syscall.compat_socketcall.accept4 =
kprobe.function("compat_sys_socketcall").call ?
{
asmlinkage()
if (int_arg(1) != @const("SYS_ACCEPT4")) next;
@_SYSCALL_COMPAT_SOCKETCALL_ACCEPT4_REGARGS
}
/* kernel 4.17+ */
probe nd2_syscall.accept4 = __nd2_syscall.accept4 ?,
__nd2_syscall.socketcall.accept4 ?,
__nd2_syscall.compat_socketcall.accept4 ?
{
@_SYSCALL_ACCEPT4_NAME
flags_str = _sock_flags_str(flags)
@_SYSCALL_ACCEPT4_ARGSTR
}
probe __nd2_syscall.accept4 = kprobe.function(@arch_syscall_prefix "sys_accept4").call
{
__set_syscall_pt_regs(pointer_arg(1))
@_SYSCALL_ACCEPT4_REGARGS
},
{
%( @_IS_SREG_KERNEL %? @_SYSCALL_ACCEPT4_REGARGS_STORE %)
}
probe __nd2_syscall.socketcall.accept4 = kprobe.function(@arch_syscall_prefix "sys_socketcall").call ?
{
__set_syscall_pt_regs(pointer_arg(1))
if (int_arg(1) != @const("SYS_ACCEPT4")) next;
@_SYSCALL_SOCKETCALL_ACCEPT4_REGARGS
}
probe __nd2_syscall.compat_socketcall.accept4 =
kprobe.function(@arch_syscall_prefix "compat_sys_socketcall").call ?
{
__set_syscall_pt_regs(pointer_arg(1))
if (int_arg(1) != @const("SYS_ACCEPT4")) next;
@_SYSCALL_COMPAT_SOCKETCALL_ACCEPT4_REGARGS
}
/* kernel 3.5+, but undesirable because it affects all syscalls */
probe tp_syscall.accept4 = __tp_syscall.accept4 ?,
__tp_syscall.socketcall.accept4 ?
{
@_SYSCALL_ACCEPT4_NAME
flags_str = _sock_flags_str(flags)
@_SYSCALL_ACCEPT4_ARGSTR
}
probe __tp_syscall.accept4 = kernel.trace("sys_enter")
{
__set_syscall_pt_regs($regs)
@__syscall_gate(@const("__NR_accept4"))
@_SYSCALL_ACCEPT4_REGARGS
},
{
%( @_IS_SREG_KERNEL %? @_SYSCALL_ACCEPT4_REGARGS_STORE %)
}
probe __tp_syscall.socketcall.accept4 = kernel.trace("sys_enter")
{
__set_syscall_pt_regs($regs)
@__syscall_compat_gate(@const("__NR_socketcall"), @const("__NR_compat_socketcall"))
if (int_arg(1) != @const("SYS_ACCEPT4")) next;
if (@__compat_task) {
@_SYSCALL_COMPAT_SOCKETCALL_ACCEPT4_REGARGS
}
else {
@_SYSCALL_SOCKETCALL_ACCEPT4_REGARGS
}
}
probe nd_syscall.accept.return = nd1_syscall.accept.return!, nd2_syscall.accept.return!, tp_syscall.accept.return
{ }
probe nd1_syscall.accept4.return = __nd1_syscall.accept4.return ?,
__nd1_syscall.socketcall.accept4.return ?
{
@_SYSCALL_ACCEPT4_NAME
@SYSC_RETVALSTR(returnval())
}
probe __nd1_syscall.accept4.return = kprobe.function("sys_accept4").return ?
{
@__syscall_nr_gate(@const("__NR_accept4"))
}
probe __nd1_syscall.socketcall.accept4.return =
kprobe.function("sys_socketcall").return ?,
kprobe.function("compat_sys_socketcall").return ?
{
if (@entry(__asmlinkage_int_arg(1)) != @const("SYS_ACCEPT4")) next;
}
/* kernel 4.17+ */
probe nd2_syscall.accept4.return =
kprobe.function(@arch_syscall_prefix "sys_accept4").return ?,
__nd2_syscall.socketcall.accept4.return ?
{
@_SYSCALL_ACCEPT4_NAME
@SYSC_RETVALSTR(returnval())
}
probe __nd2_syscall.socketcall.accept4.return =
kprobe.function(@arch_syscall_prefix "sys_socketcall").return ?,
kprobe.function(@arch_syscall_prefix "compat_sys_socketcall").return ?
{
__set_syscall_pt_regs(@entry(pointer_arg(1)))
if (int_arg(1) != @const("SYS_ACCEPT4")) next;
}
/* kernel 3.5+, but undesirable because it affects all syscalls */
probe tp_syscall.accept4.return = __tp_syscall.accept4.return ?,
__tp_syscall.socketcall.accept4.return ?
{
@_SYSCALL_ACCEPT4_NAME
@SYSC_RETVALSTR($ret)
}
probe __tp_syscall.accept4.return = kernel.trace("sys_exit")
{
@__syscall_nr_gate(@const("__NR_accept4"))
}
probe __tp_syscall.accept4.return = kernel.trace("sys_exit")
{
__set_syscall_pt_regs($regs)
@__syscall_compat_gate(@const("__NR_socketcall"), @const("__NR_compat_socketcall"))
if (int_arg(1) != @const("SYS_ACCEPT4")) next;
}