1/*- 2 * Copyright (c) 2003 Peter Wemm 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 * $FreeBSD$ 27 */ 28 29#include "opt_compat.h" 30 31#include <machine/asmacros.h> 32#include <sys/syscall.h> 33 34#include "ia32_assym.h" 35 36 .text 37 .code32 38/* 39 * Signal trampoline, copied to top of user stack 40 * XXX may need to be MD to match backend sendsig handoff protocol 41 */ 42 ALIGN_TEXT 43 .globl ia32_sigcode 44ia32_sigcode: 45 calll *IA32_SIGF_HANDLER(%esp) 46 leal IA32_SIGF_UC(%esp),%eax /* get ucontext */ 47 pushl %eax 48 movl IA32_UC_ES(%eax),%es /* restore %es */ 49 movl IA32_UC_DS(%eax),%ds /* restore %ds */ 50 movl $SYS_sigreturn,%eax 51 pushl %eax /* junk to fake return addr. */ 52 int $0x80 /* enter kernel with args */ 53 /* on stack */ 541: 55 jmp 1b 56 57#ifdef COMPAT_FREEBSD4 58 ALIGN_TEXT 59freebsd4_ia32_sigcode: 60 calll *IA32_SIGF_HANDLER(%esp) 61 leal IA32_SIGF_UC4(%esp),%eax/* get ucontext */ 62 pushl %eax 63 movl IA32_UC4_ES(%eax),%es /* restore %es */ 64 movl IA32_UC4_DS(%eax),%ds /* restore %ds */ 65 movl $344,%eax /* 4.x SYS_sigreturn */ 66 pushl %eax /* junk to fake return addr. */ 67 int $0x80 /* enter kernel with args */ 68 /* on stack */ 691: 70 jmp 1b 71#endif 72 73 ALIGN_TEXT 74esigcode: 75 76 .data 77 .globl sz_ia32_sigcode 78sz_ia32_sigcode: 79 .long esigcode-ia32_sigcode 80#ifdef COMPAT_FREEBSD4 81 .globl sz_freebsd4_ia32_sigcode 82sz_freebsd4_ia32_sigcode: 83 .long esigcode-freebsd4_ia32_sigcode 84#endif 85