1 /* $NetBSD: netbsd32_machdep_13.c,v 1.5 2023/12/20 06:36:01 thorpej Exp $ */ 2 3 /* 4 * Copyright (c) 2001 Wasabi Systems, Inc. 5 * All rights reserved. 6 * 7 * Written by Frank van der Linden for Wasabi Systems, Inc. 8 * 9 * Redistribution and use in source and binary forms, with or without 10 * modification, are permitted provided that the following conditions 11 * are met: 12 * 1. Redistributions of source code must retain the above copyright 13 * notice, this list of conditions and the following disclaimer. 14 * 2. Redistributions in binary form must reproduce the above copyright 15 * notice, this list of conditions and the following disclaimer in the 16 * documentation and/or other materials provided with the distribution. 17 * 3. All advertising materials mentioning features or use of this software 18 * must display the following acknowledgement: 19 * This product includes software developed for the NetBSD Project by 20 * Wasabi Systems, Inc. 21 * 4. The name of Wasabi Systems, Inc. may not be used to endorse 22 * or promote products derived from this software without specific prior 23 * written permission. 24 * 25 * THIS SOFTWARE IS PROVIDED BY WASABI SYSTEMS, INC. ``AS IS'' AND 26 * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED 27 * TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR 28 * PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL WASABI SYSTEMS, INC 29 * BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR 30 * CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF 31 * SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS 32 * INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN 33 * CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) 34 * ARISING IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE 35 * POSSIBILITY OF SUCH DAMAGE. 36 */ 37 38 #include <sys/cdefs.h> 39 __KERNEL_RCSID(0, "$NetBSD: netbsd32_machdep_13.c,v 1.5 2023/12/20 06:36:01 thorpej Exp $"); 40 41 #ifdef _KERNEL_OPT 42 #include "opt_compat_netbsd.h" 43 #include "opt_execfmt.h" 44 #include "opt_mtrr.h" 45 #endif 46 47 #include <sys/param.h> 48 #include <sys/exec.h> 49 #include <sys/exec_aout.h> 50 #include <sys/kmem.h> 51 #include <sys/proc.h> 52 #include <sys/signalvar.h> 53 #include <sys/systm.h> 54 #include <sys/core.h> 55 #include <sys/mount.h> 56 #include <sys/buf.h> 57 #include <sys/vnode.h> 58 #include <sys/ras.h> 59 #include <sys/ptrace.h> 60 #include <sys/kauth.h> 61 62 #include <x86/fpu.h> 63 #include <x86/dbregs.h> 64 #include <machine/frame.h> 65 #include <machine/reg.h> 66 #include <machine/vmparam.h> 67 #ifdef MTRR 68 #include <machine/mtrr.h> 69 #endif 70 #include <machine/netbsd32_machdep.h> 71 #include <machine/sysarch.h> 72 #include <machine/userret.h> 73 74 #include <compat/netbsd32/netbsd32.h> 75 #include <compat/netbsd32/netbsd32_exec.h> 76 #include <compat/netbsd32/netbsd32_syscallargs.h> 77 78 #include <compat/sys/signal.h> 79 #include <compat/sys/signalvar.h> 80 81 int check_sigcontext32(struct lwp *, const struct netbsd32_sigcontext *); 82 83 int 84 compat_13_netbsd32_sigreturn(struct lwp *l, const struct compat_13_netbsd32_sigreturn_args *uap, register_t *retval) 85 { 86 /* { 87 syscallarg(struct netbsd32_sigcontext13 *) sigcntxp; 88 } */ 89 struct proc *p = l->l_proc; 90 struct netbsd32_sigcontext13 *scp, context; 91 struct trapframe *tf; 92 sigset_t mask; 93 int error; 94 95 /* 96 * The trampoline code hands us the context. 97 * It is unsafe to keep track of it ourselves, in the event that a 98 * program jumps out of a signal handler. 99 */ 100 scp = (struct netbsd32_sigcontext13 *)NETBSD32PTR64(SCARG(uap, sigcntxp)); 101 if (copyin((void *)scp, &context, sizeof(*scp)) != 0) 102 return (EFAULT); 103 104 /* Restore register context. */ 105 tf = l->l_md.md_regs; 106 107 /* 108 * Check for security violations. 109 */ 110 error = check_sigcontext32(l, (const struct netbsd32_sigcontext *)&context); 111 if (error != 0) 112 return error; 113 114 tf->tf_gs = context.sc_gs & 0xFFFF; 115 tf->tf_fs = context.sc_fs & 0xFFFF; 116 tf->tf_es = context.sc_es & 0xFFFF; 117 tf->tf_ds = context.sc_ds & 0xFFFF; 118 tf->tf_rflags = context.sc_eflags; 119 tf->tf_rdi = context.sc_edi; 120 tf->tf_rsi = context.sc_esi; 121 tf->tf_rbp = context.sc_ebp; 122 tf->tf_rbx = context.sc_ebx; 123 tf->tf_rdx = context.sc_edx; 124 tf->tf_rcx = context.sc_ecx; 125 tf->tf_rax = context.sc_eax; 126 tf->tf_rip = context.sc_eip; 127 tf->tf_cs = context.sc_cs & 0xFFFF; 128 tf->tf_rsp = context.sc_esp; 129 tf->tf_ss = context.sc_ss & 0xFFFF; 130 131 mutex_enter(p->p_lock); 132 /* Restore signal stack. */ 133 if (context.sc_onstack & SS_ONSTACK) 134 l->l_sigstk.ss_flags |= SS_ONSTACK; 135 else 136 l->l_sigstk.ss_flags &= ~SS_ONSTACK; 137 /* Restore signal mask. */ 138 native_sigset13_to_sigset((sigset13_t *)&context.sc_mask, &mask); 139 (void) sigprocmask1(l, SIG_SETMASK, &mask, 0); 140 mutex_exit(p->p_lock); 141 142 return (EJUSTRETURN); 143 } 144 145 void 146 netbsd32_machdep_md_13_init(void) 147 { 148 149 /* Nothing to do */ 150 } 151 152 void 153 netbsd32_machdep_md_13_fini(void) 154 { 155 156 /* Nothing to do */ 157 } 158
Indexes created Sun Oct 25 00:26:45 UTC 2026