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
94 lines
2.6 KiB
ArmAsm
94 lines
2.6 KiB
ArmAsm
/* $NetBSD: __clone.S,v 1.6 2006/04/24 19:00:30 snj Exp $ */
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/*
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* Copyright (c) 2001 Christopher Gilbert
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* All rights reserved.
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*
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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. The name of the company nor the name of the author may be used to
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* endorse or promote products derived from this software without specific
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* prior written permission.
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*
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* THIS SOFTWARE IS PROVIDED BY THE AUTHOR ``AS IS'' AND ANY EXPRESS OR IMPLIED
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* WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED WARRANTIES OF
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* MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE DISCLAIMED.
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* IN NO EVENT SHALL THE AUTHOR OR CONTRIBUTORS BE LIABLE FOR ANY DIRECT,
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* INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES
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* (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR
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* 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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#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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/*
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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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/* test stack and function are not null */
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teq r0, #0x00
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teqne r1, #0x00
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beq .Leinval
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/* place the func and its arg onto the child's stack */
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stmfd r1!, {r0, r3}
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/* syscall expects (flags, stack) */
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mov r0, r2
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SYSTRAP(__clone)
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bcs PIC_SYM(CERROR, PLT)
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/*
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* r1 and r0 are the same as from fork:
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* r1 == 0 in parent process, r1 == 1 in child process.
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* r0 == pid of child in parent, r0 == pid of parent in child.
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*/
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teq r1, #0x00
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/* if this is the parent then just return the pid */
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RETc(eq)
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/*
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* This is the child
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* load the function and arg off the stack
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*/
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ldmfd sp!, {r1, r2}
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/* setup return address */
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add lr, pc, #.Lreturnhere - . - 8
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/* place arg in r0 */
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mov r0, r2
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/* call the function */
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#ifdef _ARM_ARCH_4T
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bx r1
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#else
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mov pc, r1
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#endif
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.Lreturnhere:
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/* call _exit with the returned value */
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b PIC_SYM(_C_LABEL(_exit), PLT)
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/* NOTREACHED */
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/* error handler if func or stack is NULL */
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.Leinval:
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mov R0, #EINVAL
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b PIC_SYM(CERROR, PLT)
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