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Annotation of sys/compat/hpux/hppa/hpux_sig2.c, Revision 1.1

1.1     ! nbrk        1: /*     $OpenBSD: hpux_sig2.c,v 1.1 2004/09/19 21:56:18 mickey Exp $    */
        !             2:
        !             3: /*
        !             4:  * Copyright (c) 2004 Michael Shalayeff
        !             5:  * All rights reserved.
        !             6:  *
        !             7:  * Redistribution and use in source and binary forms, with or without
        !             8:  * modification, are permitted provided that the following conditions
        !             9:  * are met:
        !            10:  * 1. Redistributions of source code must retain the above copyright
        !            11:  *    notice, this list of conditions and the following disclaimer.
        !            12:  * 2. Redistributions in binary form must reproduce the above copyright
        !            13:  *    notice, this list of conditions and the following disclaimer in the
        !            14:  *    documentation and/or other materials provided with the distribution.
        !            15:  *
        !            16:  * THIS SOFTWARE IS PROVIDED BY THE AUTHOR ``AS IS'' AND ANY EXPRESS OR
        !            17:  * IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED WARRANTIES
        !            18:  * OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE DISCLAIMED.
        !            19:  * IN NO EVENT SHALL THE AUTHOR OR HIS RELATIVES BE LIABLE FOR ANY DIRECT,
        !            20:  * INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES
        !            21:  * (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR
        !            22:  * SERVICES; LOSS OF MIND, USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
        !            23:  * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT,
        !            24:  * STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING
        !            25:  * IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF
        !            26:  * THE POSSIBILITY OF SUCH DAMAGE.
        !            27:  */
        !            28:
        !            29:
        !            30: #include <sys/param.h>
        !            31: #include <sys/systm.h>
        !            32: #include <sys/proc.h>
        !            33: #include <sys/mount.h>
        !            34: #include <sys/signalvar.h>
        !            35: #include <sys/syscallargs.h>
        !            36:
        !            37: #include <compat/hpux/hpux.h>
        !            38: #include <compat/hpux/hpux_sig.h>
        !            39: #include <compat/hpux/hpux_util.h>
        !            40: #include <compat/hpux/hppa/hpux_syscallargs.h>
        !            41:
        !            42: int
        !            43: hpux_sys_sigaltstack(struct proc *p, void *v, register_t *retval)
        !            44: {
        !            45:        struct hpux_sys_sigaltstack_args /* {
        !            46:                syscallarg(struct hpux_sigaltstack *) nss;
        !            47:                syscallarg(struct hpux_sigaltstack *) oss;
        !            48:        } */ *uap = v;
        !            49:        struct sys_sigaltstack_args saa;
        !            50:        hpux_stack_t hsa;
        !            51:        stack_t *psa, sa;
        !            52:        caddr_t sg;
        !            53:        int error;
        !            54:
        !            55:        if ((error = copyin(SCARG(uap, nss), &hsa, sizeof hsa)))
        !            56:                return (error);
        !            57:
        !            58:        sa.ss_sp = hsa.ss_sp;
        !            59:        sa.ss_size = hsa.ss_size;
        !            60:        sa.ss_flags = hsa.ss_flags & SS_ONSTACK;
        !            61:        if (hsa.ss_flags & HPUX_SS_DISABLE)
        !            62:                sa.ss_flags |= SS_DISABLE;
        !            63:
        !            64:        sg = stackgap_init(p->p_emul);
        !            65:        psa = stackgap_alloc(&sg, 2 * sizeof(struct sigaltstack));
        !            66:        SCARG(&saa, nss) = &psa[0];
        !            67:        SCARG(&saa, oss) = &psa[1];
        !            68:
        !            69:        if ((error = copyout(&sa, psa, sizeof sa)))
        !            70:                return (error);
        !            71:
        !            72:        if ((error = sys_sigaltstack(p, &saa, retval)))
        !            73:                return (error);
        !            74:
        !            75:        if ((error = copyin(SCARG(&saa, oss), &sa, sizeof sa)))
        !            76:                return (error);
        !            77:
        !            78:        hsa.ss_sp = sa.ss_sp;
        !            79:        hsa.ss_flags = sa.ss_flags & SS_ONSTACK;
        !            80:        if (sa.ss_flags & SS_DISABLE)
        !            81:                hsa.ss_flags |= HPUX_SS_DISABLE;
        !            82:        hsa.ss_size = sa.ss_size;
        !            83:
        !            84:        return (copyout(&hsa, SCARG(uap, oss), sizeof hsa));
        !            85: }