1*83762a71Sderaadt/* $OpenBSD: tfork_thread.S,v 1.5 2023/12/10 16:45:52 deraadt Exp $ */ 29674f442Sdrahn 39674f442Sdrahn/* 49674f442Sdrahn * Copyright (c) 2005 Tim Wiess <tim@nop.cx> 59674f442Sdrahn * 69674f442Sdrahn * Permission to use, copy, modify, and distribute this software for any 79674f442Sdrahn * purpose with or without fee is hereby granted, provided that the above 89674f442Sdrahn * copyright notice and this permission notice appear in all copies. 99674f442Sdrahn * 109674f442Sdrahn * THE SOFTWARE IS PROVIDED "AS IS" AND THE AUTHOR DISCLAIMS ALL WARRANTIES 119674f442Sdrahn * WITH REGARD TO THIS SOFTWARE INCLUDING ALL IMPLIED WARRANTIES OF 129674f442Sdrahn * MERCHANTABILITY AND FITNESS. IN NO EVENT SHALL THE AUTHOR BE LIABLE FOR 139674f442Sdrahn * ANY SPECIAL, DIRECT, INDIRECT, OR CONSEQUENTIAL DAMAGES OR ANY DAMAGES 149674f442Sdrahn * WHATSOEVER RESULTING FROM LOSS OF USE, DATA OR PROFITS, WHETHER IN AN 159674f442Sdrahn * ACTION OF CONTRACT, NEGLIGENCE OR OTHER TORTIOUS ACTION, ARISING OUT OF 169674f442Sdrahn * OR IN CONNECTION WITH THE USE OR PERFORMANCE OF THIS SOFTWARE. 179674f442Sdrahn */ 189674f442Sdrahn 199674f442Sdrahn#include "SYS.h" 209674f442Sdrahn 219674f442SdrahnENTRY(__tfork_thread) 2242d518b6Sderaadt RETGUARD_SETUP(__tfork_thread, %r11) 2342d518b6Sderaadt 249674f442Sdrahn li %r0, SYS___tfork 25*83762a71Sderaadt99: sc 26*83762a71Sderaadt PINSYSCALL(SYS___tfork, 99b) 27f0038c0cSkettenis cmpwi %r0, 0 289674f442Sdrahn bne 1f 299674f442Sdrahn 309674f442Sdrahn /* check if we are parent or child */ 319674f442Sdrahn cmpwi %r3, 0 329674f442Sdrahn bnelr 339674f442Sdrahn 349674f442Sdrahn /* child */ 35f0038c0cSkettenis mr %r12, %r5 369674f442Sdrahn mtlr %r5 /* fp */ 379674f442Sdrahn mr %r3, %r6 /* arg */ 389674f442Sdrahn subi %r1, %r1, 32 /* fixup sp to get headroom */ 399674f442Sdrahn blrl 409674f442Sdrahn 419674f442Sdrahn /* child returned, call __threxit */ 429674f442Sdrahn li %r0, SYS___threxit 43*83762a71Sderaadt98: sc 44*83762a71Sderaadt PINSYSCALL(SYS___threxit, 98b) 4513df6982Sderaadt .long 0 /* illegal */ 469674f442Sdrahn1: 479674f442Sdrahn stw %r0, R13_OFFSET_ERRNO(%r13) 489674f442Sdrahn li %r3, -1 4942d518b6Sderaadt RETGUARD_CHECK(__tfork_thread, %r11) 509674f442Sdrahn blr 519674f442SdrahnEND(__tfork_thread) 52