112 lines
3.9 KiB
C
112 lines
3.9 KiB
C
/* $NetBSD: compat_13_machdep.c,v 1.1 1998/09/17 02:01:59 thorpej Exp $ */
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/*-
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* Copyright (c) 1996 Matthias Pfaller.
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* Copyright (c) 1993, 1994, 1995 Charles M. Hannum. All rights reserved.
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* Copyright (c) 1993 Philip A. Nelson.
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* Copyright (c) 1992 Terrence R. Lambert.
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* Copyright (c) 1982, 1987, 1990 The Regents of the University of California.
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* All rights reserved.
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*
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* This code is derived from software contributed to Berkeley by
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* William Jolitz.
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*
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* Redistribution and use in source and binary forms, with or without
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* modification, are permitted provided that the following conditions
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* are met:
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* 1. Redistributions of source code must retain the above copyright
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* notice, this list of conditions and the following disclaimer.
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* 2. Redistributions in binary form must reproduce the above copyright
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* notice, this list of conditions and the following disclaimer in the
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* documentation and/or other materials provided with the distribution.
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* 3. All advertising materials mentioning features or use of this software
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* must display the following acknowledgement:
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* This product includes software developed by the University of
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* California, Berkeley and its contributors.
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* 4. Neither the name of the University nor the names of its contributors
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* may be used to endorse or promote products derived from this software
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* without specific prior written permission.
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*
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* THIS SOFTWARE IS PROVIDED BY THE REGENTS AND CONTRIBUTORS ``AS IS'' AND
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* ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
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* IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
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* ARE DISCLAIMED. IN NO EVENT SHALL THE REGENTS OR CONTRIBUTORS BE LIABLE
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* FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
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* DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS
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* OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
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* HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
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* LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY
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* OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
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* SUCH DAMAGE.
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*
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* @(#)machdep.c 7.4 (Berkeley) 6/3/91
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*/
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#include <sys/param.h>
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#include <sys/systm.h>
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#include <sys/signalvar.h>
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#include <sys/kernel.h>
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#include <sys/map.h>
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#include <sys/proc.h>
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#include <sys/user.h>
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#include <sys/mount.h>
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#include <sys/syscallargs.h>
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int
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compat_13_sys_sigreturn(p, v, retval)
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struct proc *p;
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void *v;
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register_t *retval;
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{
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struct compat_13_sys_sigreturn_args /* {
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syscallarg(struct sigcontext13 *) sigcntxp;
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} */ *uap = v;
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struct sigcontext13 *scp, context;
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struct reg *regs;
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sigset_t mask;
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/*
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* The trampoline code hands us the context.
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* It is unsafe to keep track of it ourselves, in the event that a
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* program jumps out of a signal handler.
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*/
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scp = SCARG(uap, sigcntxp);
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if (copyin((caddr_t)scp, &context, sizeof(*scp)) != 0)
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return (EFAULT);
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/* Restore the register context. */
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regs = p->p_md.md_regs;
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/*
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* Check for security violations.
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*/
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if (((context.sc_ps ^ regs->r_psr) & PSL_USERSTATIC) != 0)
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return (EINVAL);
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regs->r_fp = context.sc_fp;
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regs->r_sp = context.sc_sp;
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regs->r_pc = context.sc_pc;
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regs->r_psr = context.sc_ps;
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regs->r_sb = context.sc_sb;
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regs->r_r7 = context.sc_reg[REG_R7];
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regs->r_r6 = context.sc_reg[REG_R6];
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regs->r_r5 = context.sc_reg[REG_R5];
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regs->r_r4 = context.sc_reg[REG_R4];
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regs->r_r3 = context.sc_reg[REG_R3];
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regs->r_r2 = context.sc_reg[REG_R2];
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regs->r_r1 = context.sc_reg[REG_R1];
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regs->r_r0 = context.sc_reg[REG_R0];
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/* Restore signal stack. */
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if (context.sc_onstack & SS_ONSTACK)
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p->p_sigacts->ps_sigstk.ss_flags |= SS_ONSTACK;
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else
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p->p_sigacts->ps_sigstk.ss_flags &= ~SS_ONSTACK;
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/* Restore signal mask. */
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native_sigset13_to_sigset(&context.sc_mask, &mask);
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(void) sigprocmask1(p, SIG_SETMASK, &mask, 0);
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return(EJUSTRETURN);
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}
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