1/* 2 * Copyright (c) 2004 Suleiman Souhlal 3 * All rights reserved. 4 * 5 * Redistribution and use in source and binary forms, with or without 6 * modification, are permitted provided that the following conditions 7 * are met: 8 * 1. Redistributions of source code must retain the above copyright 9 * notice, this list of conditions and the following disclaimer. 10 * 2. Redistributions in binary form must reproduce the above copyright 11 * notice, this list of conditions and the following disclaimer in the 12 * documentation and/or other materials provided with the distribution. 13 * 14 * THIS SOFTWARE IS PROVIDED BY THE AUTHOR AND CONTRIBUTORS ``AS IS'' AND 15 * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE 16 * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE 17 * ARE DISCLAIMED. IN NO EVENT SHALL THE AUTHOR OR CONTRIBUTORS BE LIABLE 18 * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL 19 * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS 20 * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) 21 * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT 22 * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY 23 * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF 24 * SUCH DAMAGE. 25 */ 26 27 #include <machine/asm.h> 28 29 __FBSDID("$FreeBSD$"); 30 31 .globl CNAME(_ctx_done) 32 .globl CNAME(abort) 33 34 ENTRY(_ctx_start) 35#if !defined(_CALL_ELF) || _CALL_ELF == 1 36 /* Load values from function descriptor */ 37 ld %r2,8(%r14) 38 ld %r14,0(%r14) 39#else 40 /* Load global entry point */ 41 mr %r12,%r14 42#endif 43 mtlr %r14 44 blrl /* branch to start function */ 45 mr %r3,%r15 /* pass pointer to ucontext as argument */ 46 nop 47 bl CNAME(_ctx_done) /* branch to ctxt completion func */ 48 /* 49 * we should never return from the 50 * above branch. 51 */ 52 nop 53 bl CNAME(abort) /* abort */ 54 nop 55 END(_ctx_start) 56 57 .section .note.GNU-stack,"",%progbits 58