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// syscalls tapset macros
// Copyright (C) 2013-2019 Red Hat Inc.
//
// This file is part of systemtap, and is free software. You can
// redistribute it and/or modify it under the terms of the GNU General
// Public License (GPL); either version 2, or (at your option) any
// later version.
@define __syscall_nr_gate(syscall_nr)
%(
# Here we don't care if we're in a compat task or not, we just
# want to make sure we've got the correct syscall number.
#
# If _stp_syscall_nr() fails, that means we aren't in user
# context. So, skip this call.
try { if (_stp_syscall_nr() != @syscall_nr) next } catch { next }
%)
@define __syscall_gate(syscall_nr)
%(
# On some platforms (like s390x and ppc64), the 32-bit
# syscalls use the same syscall number as the 64-bit
# syscall. So, we have to check to see if this is a
# 32-on-64-bit user task.
@__syscall_gate_compat_simple
# If _stp_syscall_nr() fails, that means we aren't in user
# context. So, skip this call.
try { if (_stp_syscall_nr() != @syscall_nr) next } catch { next }
%)
@define __syscall_gate2(syscall_nr1, syscall_nr2)
%(
# On some platforms (like s390x and ppc64), the 32-bit
# syscalls use the same syscall number as the 64-bit
# syscall. So, we have to check to see if this is a
# 32-on-64-bit user task.
@__syscall_gate_compat_simple
try { __nr = _stp_syscall_nr() } catch { next }
if ((__nr != @syscall_nr1) && (__nr != @syscall_nr2)) next
%)
@define __syscall_compat_gate(syscall_nr, compat_syscall_nr)
%(
%( CONFIG_COMPAT == "y" %?
try { __nr = _stp_syscall_nr() } catch { next }
if (@__compat_task) {
if (__nr != @compat_syscall_nr)
next
}
else if (__nr != @syscall_nr)
next
%:
try { if (_stp_syscall_nr() != @syscall_nr) next } catch { next }
%)
%)
@define __compat_syscall_gate(compat_syscall_nr)
%(
@__syscall_gate_noncompat_simple
%( CONFIG_COMPAT == "y" %?
try { __nr = _stp_syscall_nr() } catch { next }
if (@__compat_task) {
if (__nr != @compat_syscall_nr) next
}
%)
%)
@define __compat_syscall_gate_negative(compat_syscall_nr)
%(
%( CONFIG_COMPAT == "y" %?
try { __nr = _stp_syscall_nr() } catch { next }
if (@__compat_task) {
if (__nr == @compat_syscall_nr) next
}
%)
%)
@define __syscall_gate_compat_simple
%(
%( CONFIG_COMPAT == "y" %?
if (@__compat_task) next
%)
%)
@define __syscall_gate_noncompat_simple
%(
%( CONFIG_COMPAT == "y" %?
if (! @__compat_task) next
%:
next
%)
%)
@define __pointer(val)
%(
%( CONFIG_64BIT == "y" %?
%( CONFIG_COMPAT == "y" %?
# If this is a compat task, the high bits of a pointer may be
# garbage.
(@__compat_task ? (@val & 0xffffffff) : @val)
%:
@val
%)
%:
(@val & 0xffffffff)
%)
%)
@define _af_inet_info_u(my_addr_uaddr, addrlen)
%(
%( systemtap_v >= "2.5" %?
uaddr_af = _struct_sockaddr_u_sa_family(@my_addr_uaddr, @addrlen)
if (_struct_sockaddr_u_sa_family(@my_addr_uaddr, @addrlen) =~ "AF_INET.*") {
uaddr_ip = _struct_sockaddr_u_ip_addr(@my_addr_uaddr, @addrlen)
uaddr_ip_port = _struct_sockaddr_u_tcp_port(@my_addr_uaddr, @addrlen)
if (_struct_sockaddr_u_sa_family(@my_addr_uaddr, @addrlen) == "AF_INET6") {
uaddr_ipv6_flowinfo = _struct_sockaddr_u_ipv6_flowinfo(@my_addr_uaddr, @addrlen)
uaddr_ipv6_scope_id = _struct_sockaddr_u_ipv6_scope_id(@my_addr_uaddr, @addrlen)
}
}
%)
%)
# The following argstr processing is modeled on strace's handling of
# futex. Because it is so complicated and is used in 4 places
# (syscall.futex, syscall.compat_futex, nd_syscall.futex, and
# nd_syscall.compat_futex), a macro is used to handle all the
# details.
@define __futex_argstr(uaddr, op, val, utime, uaddr2, val3)
%(
if (@op == @const("FUTEX_WAKE_BITSET")) {
argstr = sprintf("%p, %s, %d, %#x", @uaddr, _futex_op_str(@op),
@val, @val3)
}
else if (@op == @const("FUTEX_WAIT")) {
argstr = sprintf("%p, %s, %d, %s", @uaddr, _futex_op_str(@op),
@val,
(@__compat_task
? _struct_compat_timespec_u(@utime, 1)
: _struct_timespec_u(@utime, 1)))
}
else if (@op == @const("FUTEX_WAIT_BITSET")) {
argstr = sprintf("%p, %s, %d, %s, %#x", @uaddr,
_futex_op_str(@op), @val,
(@__compat_task
? _struct_compat_timespec_u(@utime, 1)
: _struct_timespec_u(@utime, 1)), @val3)
}
else if (@op == @const("FUTEX_REQUEUE")) {
argstr = sprintf("%p, %s, %d, %d, %p", @uaddr,
_futex_op_str(@op), @val, @utime,
@uaddr2)
}
else if (@op == @const("FUTEX_CMP_REQUEUE")
|| @op == @const("FUTEX_CMP_REQUEUE_PI")) {
argstr = sprintf("%p, %s, %d, %u, %p, %d", @uaddr,
_futex_op_str(@op), @val, @utime,
@uaddr2, @val3)
}
else if (@op == @const("FUTEX_WAKE_OP")) {
argstr = sprintf("%p, %s, %d, %u, %p, %s", @uaddr,
_futex_op_str(@op), @val, @utime,
@uaddr2, _futex_wake_op_str(@val3))
}
else if (@op == @const("FUTEX_WAIT_REQUEUE_PI")) {
argstr = sprintf("%p, %s, %d, %s, %p", @uaddr,
_futex_op_str(@op), @val,
(@__compat_task
? _struct_compat_timespec_u(@utime, 1)
: _struct_timespec_u(@utime, 1)),
@uaddr2)
}
else {
argstr = sprintf("%p, %s, %d", @uaddr, _futex_op_str(@op),
@val)
}
%)
%( systemtap_v <= "2.9" %?
@define __int32_compat(arg)
%(
%( CONFIG_64BIT == "y" %?
(@__compat_task ? __int32(@arg) : @arg)
%:
(__int32(@arg))
%)
%)
%)
@define __keyctl_argstr(option, arg2, arg3, arg4, arg5)
%(
if ((@option == @const("KEYCTL_READ")) ||
(@option == @const("KEYCTL_DESCRIBE")) ||
(@option == @const("KEYCTL_GET_SECURITY"))) {
argstr = sprintf("%s, %s, %p, %d", _stp_keyctl_cmd_str(@option),
_stp_keyctl_keyring_shortcut_str(@arg2),
@arg3, @__compat_long(@arg4))
}
else if (@option == @const("KEYCTL_UPDATE")) {
argstr = sprintf("%s, %d, %s, %d", _stp_keyctl_cmd_str(@option),
@__compat_long(@arg2), user_string_quoted(@arg3),
@__compat_long(@arg4))
}
else if ((@option == @const("KEYCTL_REVOKE")) ||
(@option == @const("KEYCTL_CLEAR")) ||
(@option == @const("KEYCTL_INVALIDATE")) ||
(@option == @const("KEYCTL_ASSUME_AUTHORITY"))) {
argstr = sprintf("%s, %d", _stp_keyctl_cmd_str(@option),
@__compat_long(@arg2))
}
else if ((@option == @const("KEYCTL_LINK")) ||
(@option == @const("KEYCTL_UNLINK"))) {
argstr = sprintf("%s, %d, %d", _stp_keyctl_cmd_str(@option),
@__compat_long(@arg2), @__compat_long(@arg3))
}
else if (@option == @const("KEYCTL_SEARCH")) {
argstr = sprintf("%s, %d, %s, %s, %d", _stp_keyctl_cmd_str(@option),
@__compat_long(@arg2), user_string_quoted(@arg3),
user_string_quoted(@arg4), @__compat_long(@arg5))
}
else if (@option == @const("KEYCTL_CHOWN")) {
argstr = sprintf("%s, %d, %d, %d", _stp_keyctl_cmd_str(@option),
@__compat_long(@arg2), @__compat_long(@arg3),
@__compat_long(@arg4))
}
else if (@option == @const("KEYCTL_SETPERM")) {
argstr = sprintf("%s, %d, %s", _stp_keyctl_cmd_str(@option),
@__compat_long(@arg2), _stp_keyctl_perm_str(@arg3))
}
else if ((@option == @const("KEYCTL_INSTANTIATE"))) {
argstr = sprintf("%s, %d, %s, %d, %d", _stp_keyctl_cmd_str(@option),
@__compat_long(@arg2), user_string_quoted(@arg3),
@__compat_long(@arg4), @__compat_long(@arg5))
}
else if ((@option == @const("KEYCTL_INSTANTIATE_IOV"))) {
argstr = sprintf("%s, %d, %p, %d, %d", _stp_keyctl_cmd_str(@option),
@__compat_long(@arg2), @arg3, @__compat_long(@arg4),
@__compat_long(@arg5))
}
else if (@option == @const("KEYCTL_NEGATE")) {
argstr = sprintf("%s, %d, %u, %d", _stp_keyctl_cmd_str(@option),
@__compat_long(@arg2), @arg3, @__compat_long(@arg4))
}
else if (@option == @const("KEYCTL_REJECT")) {
argstr = sprintf("%s, %d, %u, %u, %d", _stp_keyctl_cmd_str(@option),
@__compat_long(@arg2), @arg3, @arg4,
@__compat_long(@arg5))
}
else if (@option == @const("KEYCTL_SET_TIMEOUT")) {
argstr = sprintf("%s, %d, %u", _stp_keyctl_cmd_str(@option),
@__compat_long(@arg2), @arg3)
}
else if (@option == @const("KEYCTL_GET_KEYRING_ID")) {
argstr = sprintf("%s, %s, %d", _stp_keyctl_cmd_str(@option),
_stp_keyctl_keyring_shortcut_str(@arg2),
@__compat_long(@arg3))
}
else if (@option == @const("KEYCTL_SET_REQKEY_KEYRING")) {
argstr = sprintf("%s, %s", _stp_keyctl_cmd_str(@option),
_stp_keyctl_default_keyrings_str(@arg2))
}
else if (@option == @const("KEYCTL_JOIN_SESSION_KEYRING")) {
argstr = sprintf("%s, %p", _stp_keyctl_cmd_str(@option), @arg2)
}
else if (@option == @const("KEYCTL_GET_PERSISTENT")) {
argstr = sprintf("%s, %d, %d", _stp_keyctl_cmd_str(@option),
@__compat_long(@arg2), @__compat_long(@arg3))
}
else {
argstr = sprintf("%d, %d, %d, %d, %d", @option,
@__compat_long(@arg2), @__compat_long(@arg3),
@__compat_long(@arg4), @__compat_long(@arg5))
}
%)
@define __quotactl_argstr(subcmd, arg1, arg2, arg3, arg4)
%(
if (@subcmd == @const("Q_QUOTAON")) {
argstr = sprintf("%s, %s, %s, %s",
_quotactl_cmd_str(@arg1), user_string_quoted(@arg2),
_quotactl_quota_type_str(@arg3),
user_string_quoted(@arg4))
}
else if ((@subcmd == @const("Q_GETQUOTA")) ||
(@subcmd == @const("Q_SETQUOTA"))) {
argstr = sprintf("%s, %s, %d, %s",
_quotactl_cmd_str(@arg1), user_string_quoted(@arg2),
@arg3, _struct_dqblk_u(@arg4))
}
else if ((@subcmd == @const("Q_GETINFO")) ||
(@subcmd == @const("Q_SETINFO"))) {
argstr = sprintf("%s, %s, %d, %s",
_quotactl_cmd_str(@arg1), user_string_quoted(@arg2),
@arg3, _struct_dqinfo_u(@arg4))
}
else if (@subcmd == @const("Q_GETFMT")) {
argstr = sprintf("%s, %s, %d, %x",
_quotactl_cmd_str(@arg1), user_string_quoted(@arg2),
@arg3, @arg4)
}
else if ((@subcmd == @const("Q_SYNC")) ||
(@subcmd == @const("Q_QUOTAOFF"))) {
argstr = sprintf("%s, %s, %d, %p",
_quotactl_cmd_str(@arg1), user_string_quoted(@arg2),
@arg3, @arg4)
}
else {
argstr = sprintf("%s, %p, %d, %p", _quotactl_cmd_str(@arg1),
@arg2, @arg3, @arg4)
}
%)
# @__compat_ulong() macro adds the ability to distinguish between compat and non-compat
# task to the __ulong() function making it full-featured couterpart to ulong_arg().
@define __compat_ulong(arg)
%(
%( CONFIG_COMPAT == "y" %?
(@__compat_task ? __uint32(@arg) : __ulong(@arg))
%:
__ulong(@arg)
%)
%)
# @__compat_long() macro adds the ability to distinguish between compat and non-compat
# task to the __long() function making it full-featured couterpart to long_arg().
@define __compat_long(arg)
%(
%( CONFIG_COMPAT == "y" %?
(@__compat_task ? __int32(@arg) : __long(@arg))
%:
__long(@arg)
%)
%)
@define __BIG_ENDIAN
%(
%{ /* pure */
#ifdef __BIG_ENDIAN
1
#else
0
#endif
%}
%)
# @__pos_from_hilo() is lifted straight from fs/read_write.c and only
# used by preadv*/pwritev*.
@define __pos_from_hilo(high, low)
%(
(((__ulong(@high) << (@const("BITS_PER_LONG") / 2)) << (@const("BITS_PER_LONG") / 2)) | __ulong(@low))
%)
# Here's an explanation of the @cast() 3rd argument here. In RHEL6-era
# kernels (2.6.32), the "ulong" and "unsigned int" definitions can be
# found in <linux/types.h>. However, in newer kernels those
# definitions have been moved to <uapi/linux/types.h>. But, we can't
# do "kernel<linux/types.h><uapi/linux/types.h>" because the
# <uapi/linux/types.h> doesn't exist on RHEL6-era kernels. So, we list
# each header file separately.
@define ulong_cast(val)
%(
@cast(@val, "ulong", "kernel<linux/types.h>:kernel<uapi/linux/types.h>")
%)
@define uint_cast(val)
%(
@cast(@val, "unsigned int", "kernel<linux/types.h>:kernel<uapi/linux/types.h>")
%)
// As other architectures adopt the 4.17 syscall wrapper mechanism,
// these macros will have to be conditionalized on %( arch %).
%( arch == "ia64" %?
@define arch_syscall_prefix %( "" %)
@define arch_syscall0_prefix %( "" %)
@define SYSC_CLONE_CLONE_FLAGS_ARGNO %( 1 %)
@define SYSC_CLONE_STACK_START_ARGNO %( 2 %)
@define SYSC_CLONE_PARENT_TID_UADDR_ARGNO %( 4 %)
@define SYSC_CLONE_CHILD_TID_UADDR_ARGNO %( 5 %)
%)
%( arch == "s390" %?
@define arch_syscall_prefix %( "" %)
@define arch_syscall0_prefix %( "" %)
@define SYSC_CLONE_CLONE_FLAGS_ARGNO %( 2 %)
@define SYSC_CLONE_STACK_START_ARGNO %( 1 %)
@define SYSC_CLONE_PARENT_TID_UADDR_ARGNO %( 3 %)
@define SYSC_CLONE_CHILD_TID_UADDR_ARGNO %( 4 %)
%)
%( arch == "x86_64" %?
@define arch_syscall_prefix %( "__{ia32,x64}_" %)
@define arch_syscall0_prefix %( "__x64_" %)
@define SYSC_CLONE_CLONE_FLAGS_ARGNO %( 1 %)
@define SYSC_CLONE_STACK_START_ARGNO %( 2 %)
@define SYSC_CLONE_PARENT_TID_UADDR_ARGNO %( 3 %)
@define SYSC_CLONE_CHILD_TID_UADDR_ARGNO %( @__compat_task ? 5 : 4 %)
%)
%( arch == "arm64" %?
@define arch_syscall_prefix %( "__arm64_" %)
@define arch_syscall0_prefix %( "__arm64_" %)
@define SYSC_CLONE_CLONE_FLAGS_ARGNO %( 1 %)
@define SYSC_CLONE_STACK_START_ARGNO %( 2 %)
@define SYSC_CLONE_PARENT_TID_UADDR_ARGNO %( 3 %)
@define SYSC_CLONE_CHILD_TID_UADDR_ARGNO %( 5 %)
%)
%( arch == "i386" || arch == "arm" || arch == "powerpc" || arch == "mips" %?
@define arch_syscall_prefix %( "" %)
@define arch_syscall0_prefix %( "" %)
@define SYSC_CLONE_CLONE_FLAGS_ARGNO %( 1 %)
@define SYSC_CLONE_STACK_START_ARGNO %( 2 %)
@define SYSC_CLONE_PARENT_TID_UADDR_ARGNO %( 3 %)
@define SYSC_CLONE_CHILD_TID_UADDR_ARGNO %( 5 %)
%)
@define SYSC_RETVALSTR(val)
%(
%( systemtap_v >= "4.0" %? retval = @val; %)
%( systemtap_v <= "4.0" %? set_returnval(@val); %)
retstr = return_str(1,@val);
%)
@define SYSC_RETVALSTR2(val)
%(
%( systemtap_v >= "4.0" %? retval = @val; %)
%( systemtap_v <= "4.0" %? set_returnval(@val); %)
retstr = return_str(2,@val);
%)
@define SYSC_RETVALSTR3(val)
%(
%( systemtap_v >= "4.0" %? retval = @val; %)
%( systemtap_v <= "4.0" %? set_returnval(@val); %)
retstr = return_str(3,@val);
%)