2fe8fb192f
There is important information about booting non-ack images in docs/UPDATING. ack/aout-format images can't be built any more, and booting clang/ELF-format ones is a little different. Updating to the new boot monitor is recommended. Changes in this commit: . drop boot monitor -> allowing dropping ack support . facility to copy ELF boot files to /boot so that old boot monitor can still boot fairly easily, see UPDATING . no more ack-format libraries -> single-case libraries . some cleanup of OBJECT_FMT, COMPILER_TYPE, etc cases . drop several ack toolchain commands, but not all support commands (e.g. aal is gone but acksize is not yet). . a few libc files moved to netbsd libc dir . new /bin/date as minix date used code in libc/ . test compile fix . harmonize includes . /usr/lib is no longer special: without ack, /usr/lib plays no kind of special bootstrapping role any more and bootstrapping is done exclusively through packages, so releases depend even less on the state of the machine making them now. . rename nbsd_lib* to lib* . reduce mtree
142 lines
5.1 KiB
C
142 lines
5.1 KiB
C
/* $NetBSD: SYS.h,v 1.19 2009/12/14 01:07:41 matt Exp $ */
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/*-
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* Copyright (c) 1996 Jonathan Stone
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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 Jonathan Stone for
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* the NetBSD Project.
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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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* Copyright (c) 1991, 1993
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* The Regents of the University of California. All rights reserved.
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*
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* This code is derived from software contributed to Berkeley by
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* Ralph Campbell.
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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. 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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* from: @(#)SYS.h 8.1 (Berkeley) 6/4/93
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*/
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#include <sys/syscall.h>
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#include <mips/asm.h>
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/*
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* If compiling for shared libs, Emit sysV ABI PIC segment pseudo-ops.
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*
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* i) Emit .abicalls before .LEAF entrypoint, and .cpload/.cprestore after.
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* ii) Do interprocedure jumps indirectly via t9, with the side-effect of
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* preserving the callee's entry address in t9.
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*/
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#ifdef __ABICALLS__
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.abicalls
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# if defined(__mips_o32) || defined(__mips_o64)
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# define PIC_PROLOGUE(x) SETUP_GP
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# define PIC_TAILCALL(l) PTR_LA t9, _C_LABEL(l); jr t9
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# define PIC_RETURN() j ra
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# else
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# define PIC_PROLOGUE(x) SETUP_GP64(t3, x)
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# define PIC_TAILCALL(l) PTR_LA t9, _C_LABEL(l); RESTORE_GP64; jr t9
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# define PIC_RETURN() RESTORE_GP64; j ra
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# endif
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#else
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# define PIC_PROLOGUE(x)
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# define PIC_TAILCALL(l) j _C_LABEL(l)
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# define PIC_RETURN()
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#endif /* __ABICALLS__ */
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#ifdef __STDC__
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# define SYSTRAP(x) li v0,SYS_ ## x; syscall;
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#else
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# define SYSTRAP(x) li v0,SYS_/**/x; syscall;
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#endif
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/*
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* Do a syscall that cannot fail (sync, get{p,u,g,eu,eg)id)
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*/
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#define RSYSCALL_NOERROR(x) \
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PSEUDO_NOERROR(x,x)
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/*
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* Do a normal syscall.
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*/
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#define RSYSCALL(x) \
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PSEUDO(x,x)
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/*
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* Do a syscall that has an internal name and a weak external alias.
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*/
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#define WSYSCALL(weak,strong) \
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WEAK_ALIAS(weak,strong); \
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PSEUDO(strong,weak)
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/*
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* Do a renamed or pseudo syscall (e.g., _exit()), where the entrypoint
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* and syscall name are not the same.
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*/
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#define PSEUDO_NOERROR(x,y) \
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LEAF(x); \
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SYSTRAP(y); \
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j ra; \
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END(x)
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#define PSEUDO(x,y) \
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LEAF(x); \
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PIC_PROLOGUE(x); \
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SYSTRAP(y); \
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bne a3,zero,err; \
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PIC_RETURN(); \
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err: \
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PIC_TAILCALL(__cerror); \
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END(x)
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