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5b813f1a2a
Prior to this change we would assume the ABI for Apple targets to be GNU which could result in subtle errors in LLVM emitting calls to non-existent system libc provided functions such as `_sincosf` which is a GNU extension and as such is not provided by macOS for example. This would result in linker errors where the linker would not be able to find the said symbol in `libSystem.tbd`. With this change, we now correctly identify macOS (and other Apple platforms) as having ABI `unknown` which translates to unspecified in LLVM under-the-hood: ``` // main.ll target triple = "aarch64-unknown-macos-unknown" ``` Note however that we never suffix the target OS with target version such as `macos11` or `macos12` which means we fail to instruct LLVM of potential optimisations provided by the OS such as the availability of function `___sincosf_stret`. I suggest we investigate that in a follow-up commit.
283 lines
13 KiB
C
Vendored
283 lines
13 KiB
C
Vendored
/*
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* Copyright (c) 2000-2018 Apple Inc. All rights reserved.
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*
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* @APPLE_OSREFERENCE_LICENSE_HEADER_START@
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*
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* This file contains Original Code and/or Modifications of Original Code
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* as defined in and that are subject to the Apple Public Source License
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* Version 2.0 (the 'License'). You may not use this file except in
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* compliance with the License. The rights granted to you under the License
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* may not be used to create, or enable the creation or redistribution of,
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* unlawful or unlicensed copies of an Apple operating system, or to
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* circumvent, violate, or enable the circumvention or violation of, any
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* terms of an Apple operating system software license agreement.
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*
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* Please obtain a copy of the License at
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* http://www.opensource.apple.com/apsl/ and read it before using this file.
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*
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* The Original Code and all software distributed under the License are
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* distributed on an 'AS IS' basis, WITHOUT WARRANTY OF ANY KIND, EITHER
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* EXPRESS OR IMPLIED, AND APPLE HEREBY DISCLAIMS ALL SUCH WARRANTIES,
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* INCLUDING WITHOUT LIMITATION, ANY WARRANTIES OF MERCHANTABILITY,
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* FITNESS FOR A PARTICULAR PURPOSE, QUIET ENJOYMENT OR NON-INFRINGEMENT.
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* Please see the License for the specific language governing rights and
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* limitations under the License.
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*
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* @APPLE_OSREFERENCE_LICENSE_HEADER_END@
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*/
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/*
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* Copyright (c) 1982, 1986, 1993
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* The Regents of the University of California. All rights reserved.
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*
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* Redistribution and use in source and binary forms, with or without
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* modification, are permitted provided that the following conditions
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* are met:
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* 1. Redistributions of source code must retain the above copyright
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* notice, this list of conditions and the following disclaimer.
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* 2. Redistributions in binary form must reproduce the above copyright
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* notice, this list of conditions and the following disclaimer in the
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* documentation and/or other materials provided with the distribution.
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* 3. All advertising materials mentioning features or use of this software
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* must display the following acknowledgement:
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* This product includes software developed by the University of
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* California, Berkeley and its contributors.
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* 4. Neither the name of the University nor the names of its contributors
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* may be used to endorse or promote products derived from this software
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* without specific prior written permission.
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*
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* THIS SOFTWARE IS PROVIDED BY THE REGENTS AND CONTRIBUTORS ``AS IS'' AND
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* ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
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* IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
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* ARE DISCLAIMED. IN NO EVENT SHALL THE REGENTS OR CONTRIBUTORS BE LIABLE
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* FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
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* DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS
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* OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
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* HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
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* LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY
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* OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
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* SUCH DAMAGE.
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*
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* @(#)tcp.h 8.1 (Berkeley) 6/10/93
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* $FreeBSD: src/sys/netinet/tcp.h,v 1.13.2.3 2001/03/01 22:08:42 jlemon Exp $
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*/
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#ifndef _NETINET_TCP_H_
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#define _NETINET_TCP_H_
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#include <sys/types.h>
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#include <sys/appleapiopts.h>
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#include <machine/endian.h>
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#include <machine/types.h> /* __uint32_t */
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#if !defined(_POSIX_C_SOURCE) || defined(_DARWIN_C_SOURCE)
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typedef __uint32_t tcp_seq;
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typedef __uint32_t tcp_cc; /* connection count per rfc1644 */
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#define tcp6_seq tcp_seq /* for KAME src sync over BSD*'s */
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#define tcp6hdr tcphdr /* for KAME src sync over BSD*'s */
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/*
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* TCP header.
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* Per RFC 793, September, 1981.
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*/
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struct tcphdr {
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unsigned short th_sport; /* source port */
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unsigned short th_dport; /* destination port */
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tcp_seq th_seq; /* sequence number */
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tcp_seq th_ack; /* acknowledgement number */
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#if __DARWIN_BYTE_ORDER == __DARWIN_LITTLE_ENDIAN
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unsigned int th_x2:4, /* (unused) */
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th_off:4; /* data offset */
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#endif
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#if __DARWIN_BYTE_ORDER == __DARWIN_BIG_ENDIAN
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unsigned int th_off:4, /* data offset */
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th_x2:4; /* (unused) */
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#endif
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unsigned char th_flags;
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#define TH_FIN 0x01
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#define TH_SYN 0x02
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#define TH_RST 0x04
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#define TH_PUSH 0x08
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#define TH_ACK 0x10
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#define TH_URG 0x20
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#define TH_ECE 0x40
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#define TH_CWR 0x80
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#define TH_FLAGS (TH_FIN|TH_SYN|TH_RST|TH_ACK|TH_URG|TH_ECE|TH_CWR)
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#define TH_ACCEPT (TH_FIN|TH_SYN|TH_RST|TH_ACK)
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unsigned short th_win; /* window */
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unsigned short th_sum; /* checksum */
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unsigned short th_urp; /* urgent pointer */
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};
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#define TCPOPT_EOL 0
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#define TCPOPT_NOP 1
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#define TCPOPT_MAXSEG 2
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#define TCPOLEN_MAXSEG 4
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#define TCPOPT_WINDOW 3
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#define TCPOLEN_WINDOW 3
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#define TCPOPT_SACK_PERMITTED 4 /* Experimental */
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#define TCPOLEN_SACK_PERMITTED 2
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#define TCPOPT_SACK 5 /* Experimental */
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#define TCPOLEN_SACK 8 /* len of sack block */
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#define TCPOPT_TIMESTAMP 8
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#define TCPOLEN_TIMESTAMP 10
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#define TCPOLEN_TSTAMP_APPA (TCPOLEN_TIMESTAMP+2) /* appendix A */
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#define TCPOPT_TSTAMP_HDR \
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(TCPOPT_NOP<<24|TCPOPT_NOP<<16|TCPOPT_TIMESTAMP<<8|TCPOLEN_TIMESTAMP)
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#define MAX_TCPOPTLEN 40 /* Absolute maximum TCP options len */
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#define TCPOPT_CC 11 /* CC options: RFC-1644 */
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#define TCPOPT_CCNEW 12
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#define TCPOPT_CCECHO 13
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#define TCPOLEN_CC 6
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#define TCPOLEN_CC_APPA (TCPOLEN_CC+2)
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#define TCPOPT_CC_HDR(ccopt) \
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(TCPOPT_NOP<<24|TCPOPT_NOP<<16|(ccopt)<<8|TCPOLEN_CC)
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#define TCPOPT_SIGNATURE 19 /* Keyed MD5: RFC 2385 */
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#define TCPOLEN_SIGNATURE 18
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#if MPTCP
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#define TCPOPT_MULTIPATH 30
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#endif
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#define TCPOPT_FASTOPEN 34
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#define TCPOLEN_FASTOPEN_REQ 2
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/* Option definitions */
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#define TCPOPT_SACK_PERMIT_HDR \
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(TCPOPT_NOP<<24|TCPOPT_NOP<<16|TCPOPT_SACK_PERMITTED<<8|TCPOLEN_SACK_PERMITTED)
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#define TCPOPT_SACK_HDR (TCPOPT_NOP<<24|TCPOPT_NOP<<16|TCPOPT_SACK<<8)
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/* Miscellaneous constants */
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#define MAX_SACK_BLKS 6 /* Max # SACK blocks stored at sender side */
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/*
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* A SACK option that specifies n blocks will have a length of (8*n + 2)
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* bytes, so the 40 bytes available for TCP options can specify a
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* maximum of 4 blocks.
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*/
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#define TCP_MAX_SACK 4 /* MAX # SACKs sent in any segment */
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/*
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* Default maximum segment size for TCP.
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* With an IP MTU of 576, this is 536,
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* but 512 is probably more convenient.
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* This should be defined as MIN(512, IP_MSS - sizeof (struct tcpiphdr)).
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*/
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#define TCP_MSS 512
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/*
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* TCP_MINMSS is defined to be 216 which is fine for the smallest
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* link MTU (256 bytes, SLIP interface) in the Internet.
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* However it is very unlikely to come across such low MTU interfaces
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* these days (anno dato 2004).
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* Probably it can be set to 512 without ill effects. But we play safe.
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* See tcp_subr.c tcp_minmss SYSCTL declaration for more comments.
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* Setting this to "0" disables the minmss check.
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*/
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#define TCP_MINMSS 216
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/*
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* Default maximum segment size for TCP6.
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* With an IP6 MSS of 1280, this is 1220,
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* but 1024 is probably more convenient. (xxx kazu in doubt)
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* This should be defined as MIN(1024, IP6_MSS - sizeof (struct tcpip6hdr))
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*/
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#define TCP6_MSS 1024
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#define TCP_MAXWIN 65535 /* largest value for (unscaled) window */
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#define TTCP_CLIENT_SND_WND 4096 /* dflt send window for T/TCP client */
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#define TCP_MAX_WINSHIFT 14 /* maximum window shift */
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#define TCP_MAXHLEN (0xf<<2) /* max length of header in bytes */
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#define TCP_MAXOLEN (TCP_MAXHLEN - sizeof(struct tcphdr))
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/* max space left for options */
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#endif /* (_POSIX_C_SOURCE && !_DARWIN_C_SOURCE) */
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/*
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* User-settable options (used with setsockopt).
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*/
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#define TCP_NODELAY 0x01 /* don't delay send to coalesce packets */
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#if !defined(_POSIX_C_SOURCE) || defined(_DARWIN_C_SOURCE)
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#define TCP_MAXSEG 0x02 /* set maximum segment size */
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#define TCP_NOPUSH 0x04 /* don't push last block of write */
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#define TCP_NOOPT 0x08 /* don't use TCP options */
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#define TCP_KEEPALIVE 0x10 /* idle time used when SO_KEEPALIVE is enabled */
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#define TCP_CONNECTIONTIMEOUT 0x20 /* connection timeout */
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#define PERSIST_TIMEOUT 0x40 /* time after which a connection in
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* persist timeout will terminate.
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* see draft-ananth-tcpm-persist-02.txt
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*/
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#define TCP_RXT_CONNDROPTIME 0x80 /* time after which tcp retransmissions will be
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* stopped and the connection will be dropped
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*/
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#define TCP_RXT_FINDROP 0x100 /* when this option is set, drop a connection
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* after retransmitting the FIN 3 times. It will
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* prevent holding too many mbufs in socket
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* buffer queues.
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*/
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#define TCP_KEEPINTVL 0x101 /* interval between keepalives */
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#define TCP_KEEPCNT 0x102 /* number of keepalives before close */
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#define TCP_SENDMOREACKS 0x103 /* always ack every other packet */
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#define TCP_ENABLE_ECN 0x104 /* Enable ECN on a connection */
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#define TCP_FASTOPEN 0x105 /* Enable/Disable TCP Fastopen on this socket */
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#define TCP_CONNECTION_INFO 0x106 /* State of TCP connection */
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#define TCP_NOTSENT_LOWAT 0x201 /* Low water mark for TCP unsent data */
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struct tcp_connection_info {
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u_int8_t tcpi_state; /* connection state */
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u_int8_t tcpi_snd_wscale; /* Window scale for send window */
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u_int8_t tcpi_rcv_wscale; /* Window scale for receive window */
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u_int8_t __pad1;
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u_int32_t tcpi_options; /* TCP options supported */
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#define TCPCI_OPT_TIMESTAMPS 0x00000001 /* Timestamps enabled */
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#define TCPCI_OPT_SACK 0x00000002 /* SACK enabled */
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#define TCPCI_OPT_WSCALE 0x00000004 /* Window scaling enabled */
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#define TCPCI_OPT_ECN 0x00000008 /* ECN enabled */
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u_int32_t tcpi_flags; /* flags */
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#define TCPCI_FLAG_LOSSRECOVERY 0x00000001
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#define TCPCI_FLAG_REORDERING_DETECTED 0x00000002
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u_int32_t tcpi_rto; /* retransmit timeout in ms */
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u_int32_t tcpi_maxseg; /* maximum segment size supported */
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u_int32_t tcpi_snd_ssthresh; /* slow start threshold in bytes */
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u_int32_t tcpi_snd_cwnd; /* send congestion window in bytes */
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u_int32_t tcpi_snd_wnd; /* send widnow in bytes */
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u_int32_t tcpi_snd_sbbytes; /* bytes in send socket buffer, including in-flight data */
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u_int32_t tcpi_rcv_wnd; /* receive window in bytes*/
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u_int32_t tcpi_rttcur; /* most recent RTT in ms */
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u_int32_t tcpi_srtt; /* average RTT in ms */
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u_int32_t tcpi_rttvar; /* RTT variance */
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u_int32_t
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tcpi_tfo_cookie_req:1, /* Cookie requested? */
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tcpi_tfo_cookie_rcv:1, /* Cookie received? */
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tcpi_tfo_syn_loss:1, /* Fallback to reg. TCP after SYN-loss */
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tcpi_tfo_syn_data_sent:1, /* SYN+data has been sent out */
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tcpi_tfo_syn_data_acked:1, /* SYN+data has been fully acknowledged */
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tcpi_tfo_syn_data_rcv:1, /* Server received SYN+data with a valid cookie */
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tcpi_tfo_cookie_req_rcv:1, /* Server received cookie-request */
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tcpi_tfo_cookie_sent:1, /* Server announced cookie */
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tcpi_tfo_cookie_invalid:1, /* Server received an invalid cookie */
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tcpi_tfo_cookie_wrong:1, /* Our sent cookie was wrong */
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tcpi_tfo_no_cookie_rcv:1, /* We did not receive a cookie upon our request */
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tcpi_tfo_heuristics_disable:1, /* TFO-heuristics disabled it */
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tcpi_tfo_send_blackhole:1, /* A sending-blackhole got detected */
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tcpi_tfo_recv_blackhole:1, /* A receiver-blackhole got detected */
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tcpi_tfo_onebyte_proxy:1, /* A proxy acknowledges all but one byte of the SYN */
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__pad2:17;
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u_int64_t tcpi_txpackets __attribute__((aligned(8)));
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u_int64_t tcpi_txbytes __attribute__((aligned(8)));
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u_int64_t tcpi_txretransmitbytes __attribute__((aligned(8)));
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u_int64_t tcpi_rxpackets __attribute__((aligned(8)));
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u_int64_t tcpi_rxbytes __attribute__((aligned(8)));
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u_int64_t tcpi_rxoutoforderbytes __attribute__((aligned(8)));
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u_int64_t tcpi_txretransmitpackets __attribute__((aligned(8)));
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};
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#endif /* (_POSIX_C_SOURCE && !_DARWIN_C_SOURCE) */
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#endif |