1 1.8 skrll /* $NetBSD: __clone.S,v 1.8 2020/05/05 20:43:47 skrll Exp $ */ 2 1.1 fredette 3 1.1 fredette /*- 4 1.1 fredette * Copyright (c) 2001 The NetBSD Foundation, Inc. 5 1.1 fredette * All rights reserved. 6 1.1 fredette * 7 1.1 fredette * This code is derived from software contributed to The NetBSD Foundation 8 1.1 fredette * by Matt Fredette. 9 1.1 fredette * 10 1.1 fredette * Redistribution and use in source and binary forms, with or without 11 1.1 fredette * modification, are permitted provided that the following conditions 12 1.1 fredette * are met: 13 1.1 fredette * 1. Redistributions of source code must retain the above copyright 14 1.1 fredette * notice, this list of conditions and the following disclaimer. 15 1.1 fredette * 2. Redistributions in binary form must reproduce the above copyright 16 1.1 fredette * notice, this list of conditions and the following disclaimer in the 17 1.1 fredette * documentation and/or other materials provided with the distribution. 18 1.1 fredette * 19 1.1 fredette * THIS SOFTWARE IS PROVIDED BY THE NETBSD FOUNDATION, INC. AND CONTRIBUTORS 20 1.1 fredette * ``AS IS'' AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED 21 1.1 fredette * TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR 22 1.1 fredette * PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE FOUNDATION OR CONTRIBUTORS 23 1.1 fredette * BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR 24 1.1 fredette * CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF 25 1.1 fredette * SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS 26 1.1 fredette * INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN 27 1.1 fredette * CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) 28 1.1 fredette * ARISING IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE 29 1.1 fredette * POSSIBILITY OF SUCH DAMAGE. 30 1.1 fredette */ 31 1.1 fredette 32 1.1 fredette #include <sys/errno.h> 33 1.1 fredette #include "SYS.h" 34 1.1 fredette 35 1.1 fredette #ifdef WEAK_ALIAS 36 1.1 fredette WEAK_ALIAS(clone, __clone) 37 1.1 fredette #endif 38 1.1 fredette 39 1.1 fredette /* 40 1.1 fredette * int clone(int (*fn)(void *), void *stack, int flags, void *arg); 41 1.1 fredette */ 42 1.1 fredette ENTRY(__clone, 0) 43 1.5 chs 44 1.5 chs /* 45 1.5 chs * Sanity checks: func and stack may not be NULL. 46 1.5 chs */ 47 1.8 skrll comb,= %r0, %arg0, 8f 48 1.7 skrll nop 49 1.8 skrll comb,= %r0, %arg1, 8f 50 1.7 skrll nop 51 1.5 chs 52 1.5 chs /* 53 1.5 chs * Put the func and arg arguments into a frame in the child's stack. 54 1.5 chs */ 55 1.5 chs ldo (HPPA_FRAME_SIZE * 2)(%arg1), %arg1 56 1.5 chs stw %arg0, HPPA_FRAME_ARG(0)(%arg1) 57 1.5 chs stw %arg3, HPPA_FRAME_ARG(1)(%arg1) 58 1.5 chs 59 1.5 chs /* 60 1.5 chs * The system call expects (flags, stack). 61 1.5 chs */ 62 1.5 chs copy %arg2, %arg0 63 1.5 chs SYSCALL(__clone) 64 1.5 chs comb,<>,n %r0, %ret1, 9f 65 1.5 chs bv,n %r0(%rp) 66 1.5 chs 67 1.8 skrll 8: 68 1.8 skrll b __cerror 69 1.8 skrll ldi EINVAL, %t1 70 1.8 skrll 71 1.5 chs 9: /* 72 1.5 chs * Child: Reload the function and argument from the new stack. 73 1.5 chs */ 74 1.5 chs ldw HPPA_FRAME_ARG(0)(%sp), %r22 75 1.5 chs ldw HPPA_FRAME_ARG(1)(%sp), %arg0 76 1.5 chs 77 1.5 chs /* Call the clone's entry point. */ 78 1.5 chs stw %r19, HPPA_FRAME_ARG(2)(%sp) 79 1.5 chs bl $$dyncall, %r31 80 1.7 skrll copy %r31, %rp 81 1.5 chs ldw HPPA_FRAME_ARG(2)(%sp), %r19 82 1.5 chs 83 1.5 chs /* Pass the return value to _exit(). */ 84 1.5 chs copy %ret0, %arg0 85 1.5 chs PIC_CALL(_exit) 86 1.5 chs 87 1.5 chs /* NOTREACHED */ 88 1.1 fredette EXIT(__clone) 89
Indexes created Sun Sep 21 20:09:37 GMT 2025