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 mtlr %r14 36 blrl /* branch to start function */ 37 mr %r3,%r15 /* pass pointer to ucontext as argument */ 38 bl CNAME(_ctx_done) /* branch to ctxt completion func */ 39 40 /* 41 * we should never return from the 42 * above branch. 43 */ 44 /* Don't bother saving off %r30, we're already in a bad state. */ 45 bcl 20,31,1f 461: mflr %r30 47 mr %r3,%r30 # save for _DYNAMIC 48 addis %r30,%r30,_GLOBAL_OFFSET_TABLE_-1b@ha 49 addi %r30,%r30,_GLOBAL_OFFSET_TABLE_-1b@l 50 bl PIC_PLT(CNAME(abort)) /* abort */ 51 END(_ctx_start) 52 53 .section .note.GNU-stack,"",%progbits 54