mirror of
https://github.com/ziglang/zig.git
synced 2025-12-11 16:53:06 +00:00
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.
253 lines
10 KiB
C
Vendored
253 lines
10 KiB
C
Vendored
/*
|
|
* Copyright (c) 2000 Apple Computer, Inc. All rights reserved.
|
|
*
|
|
* @APPLE_OSREFERENCE_LICENSE_HEADER_START@
|
|
*
|
|
* This file contains Original Code and/or Modifications of Original Code
|
|
* as defined in and that are subject to the Apple Public Source License
|
|
* Version 2.0 (the 'License'). You may not use this file except in
|
|
* compliance with the License. The rights granted to you under the License
|
|
* may not be used to create, or enable the creation or redistribution of,
|
|
* unlawful or unlicensed copies of an Apple operating system, or to
|
|
* circumvent, violate, or enable the circumvention or violation of, any
|
|
* terms of an Apple operating system software license agreement.
|
|
*
|
|
* Please obtain a copy of the License at
|
|
* http://www.opensource.apple.com/apsl/ and read it before using this file.
|
|
*
|
|
* The Original Code and all software distributed under the License are
|
|
* distributed on an 'AS IS' basis, WITHOUT WARRANTY OF ANY KIND, EITHER
|
|
* EXPRESS OR IMPLIED, AND APPLE HEREBY DISCLAIMS ALL SUCH WARRANTIES,
|
|
* INCLUDING WITHOUT LIMITATION, ANY WARRANTIES OF MERCHANTABILITY,
|
|
* FITNESS FOR A PARTICULAR PURPOSE, QUIET ENJOYMENT OR NON-INFRINGEMENT.
|
|
* Please see the License for the specific language governing rights and
|
|
* limitations under the License.
|
|
*
|
|
* @APPLE_OSREFERENCE_LICENSE_HEADER_END@
|
|
*/
|
|
/* Copyright (c) 1995, 1997 Apple Computer, Inc. All Rights Reserved */
|
|
/*-
|
|
* Copyright (c) 1982, 1986, 1989, 1993
|
|
* The Regents of the University of California. All rights reserved.
|
|
* (c) UNIX System Laboratories, Inc.
|
|
* All or some portions of this file are derived from material licensed
|
|
* to the University of California by American Telephone and Telegraph
|
|
* Co. or Unix System Laboratories, Inc. and are reproduced herein with
|
|
* the permission of UNIX System Laboratories, Inc.
|
|
*
|
|
* Redistribution and use in source and binary forms, with or without
|
|
* modification, are permitted provided that the following conditions
|
|
* are met:
|
|
* 1. Redistributions of source code must retain the above copyright
|
|
* notice, this list of conditions and the following disclaimer.
|
|
* 2. Redistributions in binary form must reproduce the above copyright
|
|
* notice, this list of conditions and the following disclaimer in the
|
|
* documentation and/or other materials provided with the distribution.
|
|
* 3. All advertising materials mentioning features or use of this software
|
|
* must display the following acknowledgement:
|
|
* This product includes software developed by the University of
|
|
* California, Berkeley and its contributors.
|
|
* 4. Neither the name of the University nor the names of its contributors
|
|
* may be used to endorse or promote products derived from this software
|
|
* without specific prior written permission.
|
|
*
|
|
* THIS SOFTWARE IS PROVIDED BY THE REGENTS AND CONTRIBUTORS ``AS IS'' AND
|
|
* ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
|
|
* IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
|
|
* ARE DISCLAIMED. IN NO EVENT SHALL THE REGENTS OR CONTRIBUTORS BE LIABLE
|
|
* FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
|
|
* DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS
|
|
* OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
|
|
* HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
|
|
* LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY
|
|
* OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
|
|
* SUCH DAMAGE.
|
|
*
|
|
* @(#)param.h 8.3 (Berkeley) 4/4/95
|
|
*/
|
|
|
|
#ifndef _SYS_PARAM_H_
|
|
#define _SYS_PARAM_H_
|
|
|
|
#define BSD 199506 /* System version (year & month). */
|
|
#define BSD4_3 1
|
|
#define BSD4_4 1
|
|
|
|
#define NeXTBSD 1995064 /* NeXTBSD version (year, month, release) */
|
|
#define NeXTBSD4_0 0 /* NeXTBSD 4.0 */
|
|
|
|
#include <sys/_types.h>
|
|
#include <sys/_types/_null.h>
|
|
|
|
#ifndef LOCORE
|
|
#include <sys/types.h>
|
|
#endif
|
|
|
|
/*
|
|
* Machine-independent constants (some used in following include files).
|
|
* Redefined constants are from POSIX 1003.1 limits file.
|
|
*
|
|
* MAXCOMLEN should be >= sizeof(ac_comm) (see <acct.h>)
|
|
* MAXLOGNAME should be >= UT_NAMESIZE (see <utmp.h>)
|
|
*/
|
|
#include <sys/syslimits.h>
|
|
|
|
#define MAXCOMLEN 16 /* max command name remembered */
|
|
#define MAXINTERP 64 /* max interpreter file name length */
|
|
#define MAXLOGNAME 255 /* max login name length */
|
|
#define MAXUPRC CHILD_MAX /* max simultaneous processes */
|
|
#define NCARGS ARG_MAX /* max bytes for an exec function */
|
|
#define NGROUPS NGROUPS_MAX /* max number groups */
|
|
#define NOFILE 256 /* default max open files per process */
|
|
#define NOGROUP 65535 /* marker for empty group set member */
|
|
#define MAXHOSTNAMELEN 256 /* max hostname size */
|
|
#define MAXDOMNAMELEN 256 /* maximum domain name length */
|
|
|
|
/* Machine type dependent parameters. */
|
|
#include <machine/param.h>
|
|
|
|
/* More types and definitions used throughout the kernel. */
|
|
#include <limits.h>
|
|
|
|
/* Signals. */
|
|
#include <sys/signal.h>
|
|
|
|
/*
|
|
* Priorities. Note that with 32 run queues, differences less than 4 are
|
|
* insignificant.
|
|
*/
|
|
#define PSWP 0
|
|
#define PVM 4
|
|
#define PINOD 8
|
|
#define PRIBIO 16
|
|
#define PVFS 20
|
|
#define PZERO 22 /* No longer magic, shouldn't be here. XXX */
|
|
#define PSOCK 24
|
|
#define PWAIT 32
|
|
#define PLOCK 36
|
|
#define PPAUSE 40
|
|
#define PUSER 50
|
|
#define MAXPRI 127 /* Priorities range from 0 through MAXPRI. */
|
|
|
|
#define PRIMASK 0x0ff
|
|
#define PCATCH 0x100 /* OR'd with pri for tsleep to check signals */
|
|
#define PTTYBLOCK 0x200 /* for tty SIGTTOU and SIGTTIN blocking */
|
|
#define PDROP 0x400 /* OR'd with pri to stop re-aquistion of mutex upon wakeup */
|
|
#define PSPIN 0x800 /* OR'd with pri to require mutex in spin mode upon wakeup */
|
|
|
|
#define NBPW sizeof(int) /* number of bytes per word (integer) */
|
|
|
|
#define CMASK 022 /* default file mask: S_IWGRP|S_IWOTH */
|
|
#define NODEV (dev_t)(-1) /* non-existent device */
|
|
|
|
/*
|
|
* Clustering of hardware pages on machines with ridiculously small
|
|
* page sizes is done here. The paging subsystem deals with units of
|
|
* CLSIZE pte's describing NBPG (from machine/param.h) pages each.
|
|
*/
|
|
#define CLBYTES (CLSIZE*NBPG)
|
|
#define CLOFSET (CLSIZE*NBPG-1) /* for clusters, like PGOFSET */
|
|
#define claligned(x) ((((int)(x))&CLOFSET)==0)
|
|
#define CLOFF CLOFSET
|
|
#define CLSHIFT (PGSHIFT+CLSIZELOG2)
|
|
|
|
#if CLSIZE == 1
|
|
#define clbase(i) (i)
|
|
#define clrnd(i) (i)
|
|
#else
|
|
/* Give the base virtual address (first of CLSIZE). */
|
|
#define clbase(i) ((i) &~ (CLSIZE-1))
|
|
/* Round a number of clicks up to a whole cluster. */
|
|
#define clrnd(i) (((i) + (CLSIZE-1)) &~ (CLSIZE-1))
|
|
#endif
|
|
|
|
#define CBLOCK 64 /* Clist block size, must be a power of 2. */
|
|
#define CBQSIZE (CBLOCK/NBBY) /* Quote bytes/cblock - can do better. */
|
|
/* Data chars/clist. */
|
|
#define CBSIZE (CBLOCK - sizeof(struct cblock *) - CBQSIZE)
|
|
#define CROUND (CBLOCK - 1) /* Clist rounding. */
|
|
|
|
/*
|
|
* File system parameters and macros.
|
|
*
|
|
* The file system is made out of blocks of at most MAXPHYS units, with
|
|
* smaller units (fragments) only in the last direct block. MAXBSIZE
|
|
* primarily determines the size of buffers in the buffer pool. It may be
|
|
* made larger than MAXPHYS without any effect on existing file systems;
|
|
* however making it smaller may make some file systems unmountable.
|
|
* We set this to track the value of MAX_UPL_TRANSFER_BYTES from
|
|
* osfmk/mach/memory_object_types.h to bound it at the maximum UPL size.
|
|
*/
|
|
#define MAXBSIZE (256 * 4096)
|
|
#define MAXPHYSIO MAXPHYS
|
|
#define MAXFRAG 8
|
|
|
|
#define MAXPHYSIO_WIRED (16 * 1024 * 1024)
|
|
|
|
/*
|
|
* MAXPATHLEN defines the longest permissable path length after expanding
|
|
* symbolic links. It is used to allocate a temporary buffer from the buffer
|
|
* pool in which to do the name expansion, hence should be a power of two,
|
|
* and must be less than or equal to MAXBSIZE. MAXSYMLINKS defines the
|
|
* maximum number of symbolic links that may be expanded in a path name.
|
|
* It should be set high enough to allow all legitimate uses, but halt
|
|
* infinite loops reasonably quickly.
|
|
*/
|
|
#define MAXPATHLEN PATH_MAX
|
|
#define MAXSYMLINKS 32
|
|
|
|
/* Bit map related macros. */
|
|
#define setbit(a, i) (((char *)(a))[(i)/NBBY] |= 1<<((i)%NBBY))
|
|
#define clrbit(a, i) (((char *)(a))[(i)/NBBY] &= ~(1<<((i)%NBBY)))
|
|
#define isset(a, i) (((char *)(a))[(i)/NBBY] & (1<<((i)%NBBY)))
|
|
#define isclr(a, i) ((((char *)(a))[(i)/NBBY] & (1<<((i)%NBBY))) == 0)
|
|
|
|
/* Macros for counting and rounding. */
|
|
#ifndef howmany
|
|
#define howmany(x, y) ((((x) % (y)) == 0) ? ((x) / (y)) : (((x) / (y)) + 1))
|
|
#endif
|
|
#define roundup(x, y) ((((x) % (y)) == 0) ? \
|
|
(x) : ((x) + ((y) - ((x) % (y)))))
|
|
#define powerof2(x) ((((x)-1)&(x))==0)
|
|
|
|
/* Macros for min/max. */
|
|
#ifndef MIN
|
|
#define MIN(a, b) (((a)<(b))?(a):(b))
|
|
#endif /* MIN */
|
|
#ifndef MAX
|
|
#define MAX(a, b) (((a)>(b))?(a):(b))
|
|
#endif /* MAX */
|
|
|
|
/*
|
|
* Constants for setting the parameters of the kernel memory allocator.
|
|
*
|
|
* 2 ** MINBUCKET is the smallest unit of memory that will be
|
|
* allocated. It must be at least large enough to hold a pointer.
|
|
*
|
|
* Units of memory less or equal to MAXALLOCSAVE will permanently
|
|
* allocate physical memory; requests for these size pieces of
|
|
* memory are quite fast. Allocations greater than MAXALLOCSAVE must
|
|
* always allocate and free physical memory; requests for these
|
|
* size allocations should be done infrequently as they will be slow.
|
|
*
|
|
* Constraints: CLBYTES <= MAXALLOCSAVE <= 2 ** (MINBUCKET + 14), and
|
|
* MAXALLOCSIZE must be a power of two.
|
|
*/
|
|
#define MINBUCKET 4 /* 4 => min allocation of 16 bytes */
|
|
#define MAXALLOCSAVE (2 * CLBYTES)
|
|
|
|
/*
|
|
* Scale factor for scaled integers used to count %cpu time and load avgs.
|
|
*
|
|
* The number of CPU `tick's that map to a unique `%age' can be expressed
|
|
* by the formula (1 / (2 ^ (FSHIFT - 11))). The maximum load average that
|
|
* can be calculated (assuming 32 bits) can be closely approximated using
|
|
* the formula (2 ^ (2 * (16 - FSHIFT))) for (FSHIFT < 15).
|
|
*
|
|
* For the scheduler to maintain a 1:1 mapping of CPU `tick' to `%age',
|
|
* FSHIFT must be at least 11; this gives us a maximum load avg of ~1024.
|
|
*/
|
|
#define FSHIFT 11 /* bits to right of fixed binary point */
|
|
#define FSCALE (1<<FSHIFT)
|
|
|
|
#endif /* _SYS_PARAM_H_ */ |