1 1.9 kamil /* $NetBSD: __sigtramp2.S,v 1.9 2020/10/19 11:29:26 kamil Exp $ */ 2 1.1 fvdl 3 1.1 fvdl /* 4 1.1 fvdl * Copyright (c) 2001 Wasabi Systems, Inc. 5 1.1 fvdl * All rights reserved. 6 1.1 fvdl * 7 1.1 fvdl * Written by Frank van der Linden for Wasabi Systems, Inc. 8 1.1 fvdl * 9 1.1 fvdl * Redistribution and use in source and binary forms, with or without 10 1.1 fvdl * modification, are permitted provided that the following conditions 11 1.1 fvdl * are met: 12 1.1 fvdl * 1. Redistributions of source code must retain the above copyright 13 1.1 fvdl * notice, this list of conditions and the following disclaimer. 14 1.1 fvdl * 2. Redistributions in binary form must reproduce the above copyright 15 1.1 fvdl * notice, this list of conditions and the following disclaimer in the 16 1.1 fvdl * documentation and/or other materials provided with the distribution. 17 1.1 fvdl * 3. All advertising materials mentioning features or use of this software 18 1.1 fvdl * must display the following acknowledgement: 19 1.1 fvdl * This product includes software developed for the NetBSD Project by 20 1.1 fvdl * Wasabi Systems, Inc. 21 1.1 fvdl * 4. The name of Wasabi Systems, Inc. may not be used to endorse 22 1.1 fvdl * or promote products derived from this software without specific prior 23 1.1 fvdl * written permission. 24 1.1 fvdl * 25 1.1 fvdl * THIS SOFTWARE IS PROVIDED BY WASABI SYSTEMS, INC. ``AS IS'' AND 26 1.1 fvdl * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED 27 1.1 fvdl * TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR 28 1.1 fvdl * PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL WASABI SYSTEMS, INC 29 1.1 fvdl * BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR 30 1.1 fvdl * CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF 31 1.1 fvdl * SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS 32 1.1 fvdl * INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN 33 1.1 fvdl * CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) 34 1.1 fvdl * ARISING IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE 35 1.1 fvdl * POSSIBILITY OF SUCH DAMAGE. 36 1.1 fvdl */ 37 1.1 fvdl 38 1.1 fvdl #include "SYS.h" 39 1.8 kamil #include "assym.h" 40 1.1 fvdl 41 1.1 fvdl /* 42 1.1 fvdl * The x86-64 signal trampoline is invoked only to return from 43 1.1 fvdl * the signal; the kernel calls the signal handler directly. 44 1.8 kamil * 45 1.8 kamil * The unwind entry includes the one byte prior to the trampoline 46 1.8 kamil * because the unwinder will look up (return PC - 1) while unwinding. 47 1.8 kamil * Normally (return PC - 1) computes an address inside the call 48 1.8 kamil * instruction that created the child frame, but here there is no call 49 1.8 kamil * instruction so we have to manually add padding. 50 1.1 fvdl */ 51 1.8 kamil .cfi_startproc simple 52 1.8 kamil .cfi_signal_frame 53 1.8 kamil .cfi_def_cfa r15, 0 54 1.8 kamil .cfi_offset rax, UC_GREGS_RAX 55 1.8 kamil .cfi_offset rdx, UC_GREGS_RDX 56 1.8 kamil .cfi_offset rcx, UC_GREGS_RCX 57 1.8 kamil .cfi_offset rbx, UC_GREGS_RBX 58 1.8 kamil .cfi_offset rsi, UC_GREGS_RSI 59 1.8 kamil .cfi_offset rdi, UC_GREGS_RDI 60 1.8 kamil .cfi_offset rbp, UC_GREGS_RBP 61 1.9 kamil .cfi_offset rsp, UC_GREGS_RSP 62 1.8 kamil .cfi_offset r8, UC_GREGS_R8 63 1.8 kamil .cfi_offset r9, UC_GREGS_R9 64 1.8 kamil .cfi_offset r10, UC_GREGS_R10 65 1.8 kamil .cfi_offset r11, UC_GREGS_R11 66 1.8 kamil .cfi_offset r12, UC_GREGS_R12 67 1.8 kamil .cfi_offset r13, UC_GREGS_R13 68 1.8 kamil .cfi_offset r14, UC_GREGS_R14 69 1.8 kamil .cfi_offset r15, UC_GREGS_R15 70 1.8 kamil .cfi_offset rip, UC_GREGS_RIP 71 1.8 kamil nop 72 1.1 fvdl NENTRY(__sigtramp_siginfo_2) 73 1.2 fvdl movq %r15,%rdi 74 1.1 fvdl movq $SYS_setcontext, %rax 75 1.4 drochner syscall 76 1.5 drochner movq $-1,%rdi /* if we return here, something is wrong */ 77 1.1 fvdl movq $SYS_exit, %rax 78 1.1 fvdl syscall 79 1.7 christos .cfi_endproc 80 1.6 uebayasi END(__sigtramp_siginfo_2) 81
Indexes created Sat Sep 27 22:09:54 GMT 2025