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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.
186 lines
7.2 KiB
C
Vendored
186 lines
7.2 KiB
C
Vendored
/*
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* Copyright (c) 2000-2002 Apple Computer, 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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/* $NetBSD: shm.h,v 1.15 1994/06/29 06:45:17 cgd Exp $ */
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/*
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* Copyright (c) 1994 Adam Glass
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* 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 Adam Glass.
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* 4. The name of the author may not be used to endorse or promote products
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* derived from this software without specific prior written permission
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*
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* THIS SOFTWARE IS PROVIDED BY THE AUTHOR ``AS IS'' AND ANY EXPRESS OR
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* IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED WARRANTIES
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* OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE DISCLAIMED.
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* IN NO EVENT SHALL THE AUTHOR BE LIABLE FOR ANY DIRECT, INDIRECT,
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* INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT
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* NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE,
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* DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY
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* THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT
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* (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE OF
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* THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
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*/
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/*
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* As defined+described in "X/Open System Interfaces and Headers"
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* Issue 4, p. XXX
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*/
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#ifndef _SYS_SHM_H_
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#define _SYS_SHM_H_
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#include <sys/cdefs.h>
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#include <sys/_types.h>
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/*
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* [XSI] All of the symbols from <sys/ipc.h> SHALL be defined
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* when this header is included
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*/
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#include <sys/ipc.h>
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/*
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* [XSI] The pid_t, time_t, key_t, and size_t types shall be defined as
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* described in <sys/types.h>.
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*
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* NOTE: The definition of the key_t type is implicit from the
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* inclusion of <sys/ipc.h>
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*/
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#include <sys/_types/_pid_t.h>
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#include <sys/_types/_time_t.h>
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#include <sys/_types/_size_t.h>
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/*
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* [XSI] The unsigned integer type used for the number of current attaches
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* that MUST be able to store values at least as large as a type unsigned
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* short.
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*/
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typedef unsigned short shmatt_t;
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/*
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* Possible flag values which may be OR'ed into the third argument to
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* shmat()
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*/
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#define SHM_RDONLY 010000 /* [XSI] Attach read-only (else read-write) */
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#define SHM_RND 020000 /* [XSI] Round attach address to SHMLBA */
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/*
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* This value is symbolic, and generally not expected to be sed by user
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* programs directly, although such ise is permitted by the standard. Its
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* value in our implementation is equal to the number of bytes per page.
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*
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* NOTE: We DO NOT obtain this value from the appropriate system
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* headers at this time, to avoid the resulting namespace
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* pollution, which is why we discourages its use.
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*/
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#define SHMLBA 4096 /* [XSI] Segment low boundary address multiple*/
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/* "official" access mode definitions; somewhat braindead since you have
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* to specify (SHM_* >> 3) for group and (SHM_* >> 6) for world permissions */
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#define SHM_R (IPC_R)
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#define SHM_W (IPC_W)
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#pragma pack(4)
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/*
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* Technically, we should force all code references to the new structure
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* definition, not in just the standards conformance case, and leave the
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* legacy interface there for binary compatibility only. Currently, we
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* are only forcing this for programs requesting standards conformance.
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*/
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#if __DARWIN_UNIX03 || defined(KERNEL)
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/*
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* Structure used internally.
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*
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* This structure is exposed because standards dictate that it is used as
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* the third argment to shmctl().
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*
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* NOTE: The field shm_internal is not meaningful in user space,
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* and must not be used there.
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*/
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#if (defined(_POSIX_C_SOURCE) && !defined(_DARWIN_C_SOURCE))
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struct shmid_ds
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#else
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#define shmid_ds __shmid_ds_new
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struct __shmid_ds_new
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#endif
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{
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struct __ipc_perm_new shm_perm; /* [XSI] Operation permission value */
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size_t shm_segsz; /* [XSI] Size of segment in bytes */
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pid_t shm_lpid; /* [XSI] PID of last shared memory op */
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pid_t shm_cpid; /* [XSI] PID of creator */
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shmatt_t shm_nattch; /* [XSI] Number of current attaches */
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time_t shm_atime; /* [XSI] Time of last shmat() */
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time_t shm_dtime; /* [XSI] Time of last shmdt() */
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time_t shm_ctime; /* [XSI] Time of last shmctl() change */
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void *shm_internal; /* reserved for kernel use */
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};
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#else /* !__DARWIN_UNIX03 */
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#define shmid_ds __shmid_ds_old
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#endif /* !__DARWIN_UNIX03 */
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#if !__DARWIN_UNIX03
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struct __shmid_ds_old {
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struct __ipc_perm_old shm_perm; /* [XSI] Operation permission value */
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size_t shm_segsz; /* [XSI] Size of segment in bytes */
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pid_t shm_lpid; /* [XSI] PID of last shared memory op */
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pid_t shm_cpid; /* [XSI] PID of creator */
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shmatt_t shm_nattch; /* [XSI] Number of current attaches */
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time_t shm_atime; /* [XSI] Time of last shmat() */
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time_t shm_dtime; /* [XSI] Time of last shmdt() */
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time_t shm_ctime; /* [XSI] Time of last shmctl() change */
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void *shm_internal; /* reserved for kernel use */
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};
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#endif /* !__DARWIN_UNIX03 */
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#pragma pack()
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__BEGIN_DECLS
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#if !defined(_POSIX_C_SOURCE) || defined(_DARWIN_C_SOURCE)
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int shmsys(int, ...);
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#endif /* (!_POSIX_C_SOURCE || _DARWIN_C_SOURCE) */
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void *shmat(int, const void *, int);
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int shmctl(int, int, struct shmid_ds *) __DARWIN_ALIAS(shmctl);
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int shmdt(const void *);
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int shmget(key_t, size_t, int);
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__END_DECLS
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#endif /* !_SYS_SHM_H_ */ |