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
101 lines
2.7 KiB
ArmAsm
101 lines
2.7 KiB
ArmAsm
/* $NetBSD: __clone.S,v 1.2 2002/06/06 20:51:17 fvdl Exp $ */
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/*
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* Copyright (c) 2002 Wasabi Systems, Inc.
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* All rights reserved.
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*
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* Written by Frank van der Linden for Wasabi Systems, Inc.
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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 for the NetBSD Project by
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* Wasabi Systems, Inc.
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* 4. The name of Wasabi Systems, Inc. may not be used to endorse
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* or promote products derived from this software without specific prior
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* written permission.
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*
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* THIS SOFTWARE IS PROVIDED BY WASABI SYSTEMS, INC. ``AS IS'' AND
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* ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED
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* TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR
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* PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL WASABI SYSTEMS, INC
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* BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR
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* CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF
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* SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS
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* INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN
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* CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE)
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* ARISING IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE
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* POSSIBILITY OF SUCH DAMAGE.
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*/
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#include <machine/asm.h>
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#include <sys/errno.h>
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#include "SYS.h"
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#ifdef WEAK_ALIAS
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WEAK_ALIAS(clone, __clone)
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#endif
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.text
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/*
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* int clone(int (*fn)(void *), void *stack, int flags, void *arg);
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*/
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ENTRY(__clone)
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pushq %r12
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pushq %r13
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/*
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* Sanity checks: func and stack may not be NULL.
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*/
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testq %rdi,%rdi
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je 3f
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testq %rsi,%rsi
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je 3f
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movq %rdi,%r12
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movq %rcx,%r13
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movq %rdx,%rdi
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pushq $0 /* dummy return address */
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SYSTRAP(__clone)
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jc 4f
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cmpl $0,%eax
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jne 2f /* we're the parent */
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movq %r13,%rdi /* restore argument */
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call *%r12 /* this is the clone, call the function */
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movq %rax,%rdi
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#ifdef PIC
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call PIC_PLT(_C_LABEL(_exit))
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#else
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call _C_LABEL(_exit)
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#endif
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2:
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addq $8,%rsp
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popq %r13
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popq %r12
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ret
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3:
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movl $EINVAL,%eax
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jmp 5f
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4:
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addq $8,%rsp
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5:
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popq %r13
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popq %r12
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#ifdef PIC
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movq PIC_GOT(CERROR),%rdx
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jmp *%rdx
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#else
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jmp CERROR
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#endif
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