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 $SYS_sigreturn,%eax 49 pushl %eax /* junk to fake return addr. */ 50 int $0x80 /* enter kernel with args */ 51 /* on stack */ 521: 53 jmp 1b 54 55#ifdef COMPAT_FREEBSD4 56 ALIGN_TEXT 57freebsd4_ia32_sigcode: 58 calll *IA32_SIGF_HANDLER(%esp) 59 leal IA32_SIGF_UC4(%esp),%eax/* get ucontext */ 60 pushl %eax 61 movl $344,%eax /* 4.x SYS_sigreturn */ 62 pushl %eax /* junk to fake return addr. */ 63 int $0x80 /* enter kernel with args */ 64 /* on stack */ 651: 66 jmp 1b 67#endif 68 69#ifdef COMPAT_43 70 ALIGN_TEXT 71ia32_osigcode: 72 calll *IA32_SIGF_HANDLER(%esp)/* call signal handler */ 73 leal IA32_SIGF_SC(%esp),%eax /* get sigcontext */ 74 pushl %eax 75 movl $103,%eax /* 3.x SYS_sigreturn */ 76 pushl %eax /* junk to fake return addr. */ 77 int $0x80 /* enter kernel with args */ 781: 79 jmp 1b 80 81 82 ALIGN_TEXT 83lcall_tramp: 84 pushl %ebp 85 movl %esp,%ebp 86 pushl 0x24(%ebp) /* arg 6 */ 87 pushl 0x20(%ebp) 88 pushl 0x1c(%ebp) 89 pushl 0x18(%ebp) 90 pushl 0x14(%ebp) 91 pushl 0x10(%ebp) /* arg 1 */ 92 pushl 0xc(%ebp) /* gap */ 93 int $0x80 94 leave 95 lretl 96#endif 97 98 ALIGN_TEXT 99esigcode: 100 101 .data 102 .globl sz_ia32_sigcode 103sz_ia32_sigcode: 104 .long esigcode-ia32_sigcode 105#ifdef COMPAT_FREEBSD4 106 .globl sz_freebsd4_ia32_sigcode 107sz_freebsd4_ia32_sigcode: 108 .long esigcode-freebsd4_ia32_sigcode 109#endif 110#ifdef COMPAT_43 111 .globl sz_ia32_osigcode 112sz_ia32_osigcode: 113 .long esigcode-ia32_osigcode 114 .globl sz_lcall_tramp 115sz_lcall_tramp: 116 .long esigcode-lcall_tramp 117#endif 118