/*      $NetBSD: netbsd32_signal.c,v 1.55 2024/11/22 10:41:50 mlelstv Exp $     */

/*
 * Copyright (c) 1998, 2001 Matthew R. Green
 * All rights reserved.
 *
 * Redistribution and use in source and binary forms, with or without
 * modification, are permitted provided that the following conditions
 * are met:
 * 1. Redistributions of source code must retain the above copyright
 *    notice, this list of conditions and the following disclaimer.
 * 2. Redistributions in binary form must reproduce the above copyright
 *    notice, this list of conditions and the following disclaimer in the
 *    documentation and/or other materials provided with the distribution.
 *
 * THIS SOFTWARE IS PROVIDED BY THE AUTHOR ``AS IS'' AND ANY EXPRESS OR
 * IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED WARRANTIES
 * OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE DISCLAIMED.
 * IN NO EVENT SHALL THE AUTHOR BE LIABLE FOR ANY DIRECT, INDIRECT,
 * INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING,
 * BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES;
 * LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED
 * AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY,
 * OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY
 * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
 * SUCH DAMAGE.
 */

#include <sys/cdefs.h>
__KERNEL_RCSID(0, "$NetBSD: netbsd32_signal.c,v 1.55 2024/11/22 10:41:50 mlelstv Exp $");

#if defined(_KERNEL_OPT) 
#include "opt_ktrace.h"
#endif

#include <sys/param.h>
#include <sys/systm.h>
#include <sys/mount.h>
#include <sys/stat.h>
#include <sys/time.h>
#include <sys/signalvar.h>
#include <sys/ktrace.h>
#include <sys/proc.h>
#include <sys/wait.h>
#include <sys/dirent.h>
#include <sys/module.h>
#include <sys/exec.h>

#include <uvm/uvm_extern.h>

#include <compat/netbsd32/netbsd32.h>
#include <compat/netbsd32/netbsd32_conv.h>
#include <compat/netbsd32/netbsd32_exec.h>
#include <compat/netbsd32/netbsd32_syscallargs.h>

#include <compat/sys/signal.h>
#include <compat/sys/signalvar.h>
#include <compat/sys/siginfo.h>
#include <compat/sys/ucontext.h>
#include <compat/common/compat_sigaltstack.h>

int
netbsd32_sigaction(struct lwp *l, const struct netbsd32_sigaction_args *uap, register_t *retval)
{
        /* {
                syscallarg(int) signum;
                syscallarg(const netbsd32_sigactionp_t) nsa;
                syscallarg(netbsd32_sigactionp_t) osa;
        } */
        struct sigaction nsa, osa;
        struct netbsd32_sigaction13 *sa32p, sa32;
        int error;

        if (SCARG_P32(uap, nsa)) {
                sa32p = SCARG_P32(uap, nsa);
                if (copyin(sa32p, &sa32, sizeof(sa32)))
                        return EFAULT;
                nsa.sa_handler = (void *)NETBSD32PTR64(sa32.netbsd32_sa_handler);
                memset(&nsa.sa_mask, 0, sizeof(nsa.sa_mask));
                nsa.sa_mask.__bits[0] = sa32.netbsd32_sa_mask;
                nsa.sa_flags = sa32.netbsd32_sa_flags;
        }
        error = sigaction1(l, SCARG(uap, signum),
                           SCARG_P32(uap, nsa) ? &nsa : 0,
                           SCARG_P32(uap, osa) ? &osa : 0,
                           NULL, 0);

        if (error)
                return error;

        if (SCARG_P32(uap, osa)) {
                memset(&sa32, 0, sizeof(sa32));
                NETBSD32PTR32(sa32.netbsd32_sa_handler, osa.sa_handler);
                sa32.netbsd32_sa_mask = osa.sa_mask.__bits[0];
                sa32.netbsd32_sa_flags = osa.sa_flags;
                sa32p = SCARG_P32(uap, osa);
                if (copyout(&sa32, sa32p, sizeof(sa32)))
                        return EFAULT;
        }

        return 0;
}

int
netbsd32___sigaltstack14(struct lwp *l, const struct netbsd32___sigaltstack14_args *uap, register_t *retval)
{
        /* {
                syscallarg(const netbsd32_sigaltstackp_t) nss;
                syscallarg(netbsd32_sigaltstackp_t) oss;
        } */
        compat_sigaltstack(uap, netbsd32_sigaltstack, SS_ONSTACK, SS_DISABLE);
}

/* ARGSUSED */
int
netbsd32___sigaction14(struct lwp *l, const struct netbsd32___sigaction14_args *uap, register_t *retval)
{
        /* {
                syscallarg(int) signum;
                syscallarg(const struct sigaction *) nsa;
                syscallarg(struct sigaction *) osa;
        } */
        struct netbsd32_sigaction sa32;
        struct sigaction nsa, osa;
        int error;

        if (SCARG_P32(uap, nsa)) {
                error = copyin(SCARG_P32(uap, nsa), &sa32, sizeof(sa32));
                if (error)
                        return error;
                nsa.sa_handler = NETBSD32PTR64(sa32.netbsd32_sa_handler);
                nsa.sa_mask = sa32.netbsd32_sa_mask;
                nsa.sa_flags = sa32.netbsd32_sa_flags;
        }
        error = sigaction1(l, SCARG(uap, signum),
                    SCARG_P32(uap, nsa) ? &nsa : 0,
                    SCARG_P32(uap, osa) ? &osa : 0,
                    NULL, 0);
        if (error)
                return error;
        if (SCARG_P32(uap, osa)) {
                memset(&sa32, 0, sizeof(sa32));
                NETBSD32PTR32(sa32.netbsd32_sa_handler, osa.sa_handler);
                sa32.netbsd32_sa_mask = osa.sa_mask;
                sa32.netbsd32_sa_flags = osa.sa_flags;
                error = copyout(&sa32, SCARG_P32(uap, osa), sizeof(sa32));
                if (error)
                        return error;
        }
        return 0;
}

/* ARGSUSED */
int
netbsd32___sigaction_sigtramp(struct lwp *l, const struct netbsd32___sigaction_sigtramp_args *uap, register_t *retval)
{
        /* {
                syscallarg(int) signum;
                syscallarg(const netbsd32_sigactionp_t) nsa;
                syscallarg(netbsd32_sigactionp_t) osa;
                syscallarg(netbsd32_voidp) tramp;
                syscallarg(int) vers;
        } */
        struct netbsd32_sigaction sa32;
        struct sigaction nsa, osa;
        int error, vers;

        if (SCARG_P32(uap, nsa)) {
                error = copyin(SCARG_P32(uap, nsa), &sa32, sizeof(sa32));
                if (error)
                        return error;
                nsa.sa_handler = NETBSD32PTR64(sa32.netbsd32_sa_handler);
                nsa.sa_mask = sa32.netbsd32_sa_mask;
                nsa.sa_flags = sa32.netbsd32_sa_flags;
        }
        vers = SCARG(uap, vers);
#ifndef __HAVE_MD_NETBSD32_SENDSIG      /* XXX paying for yesterday's sins */
        if (vers < __SIGTRAMP_SIGINFO_VERSION_MIN) {
                /*
                 * sigaction1() doesn't enforce sigcontext-ness for
                 * __SIGTRAMP_SIGCODE_VERSION because it might be
                 * a foreign emulation.  However, we know these are
                 * native NetBSD 32-bit binaries, so we do.
                 */
#ifdef __HAVE_STRUCT_SIGCONTEXT
                struct proc *p = l->l_proc;
                bool sigcontext_valid;

                /*
                 * We need to ensure the compat_netbsd32_16 module
                 * is loaded, because sigaction1() gives a free pass
                 * to processes marked PK_32 (it can't be sure which
                 * 32-bit compat module is needed).
                 */
                if ((p->p_lflag & PL_SIGCOMPAT) == 0) {
                        kernconfig_lock();
                        (void)module_autoload("compat_netbsd32_16",
                            MODULE_CLASS_ANY);
                        sigcontext_valid = netbsd32_sendsig_sigcontext_16_hook.hooked;
                        mutex_enter(&proc_lock);
                        /*
                         * Prevent unload of compat module while
                         * this process remains.
                         */
                        p->p_lflag |= PL_SIGCOMPAT;
                        mutex_exit(&proc_lock);
                        kernconfig_unlock();
                } else {
                        /*
                         * Module is already loaded and locked in memory
                         */
                        sigcontext_valid = netbsd32_sendsig_sigcontext_16_hook.hooked;
                }
                if (!sigcontext_valid) {
                        return EINVAL;
                }
// #else /* ! __HAVE_STRUCT_SIGCONTEXT */
//              return EINVAL;
#endif /* __HAVE_STRUCT_SIGCONTEXT */
        }
#endif /* __HAVE_MD_NETBSD32_SENDSIG */
        error = sigaction1(l, SCARG(uap, signum),
            SCARG_P32(uap, nsa) ? &nsa : 0,
            SCARG_P32(uap, osa) ? &osa : 0,
            SCARG_P32(uap, tramp), vers);
        if (error)
                return error;
        if (SCARG_P32(uap, osa)) {
                memset(&sa32, 0, sizeof(sa32));
                NETBSD32PTR32(sa32.netbsd32_sa_handler, osa.sa_handler);
                sa32.netbsd32_sa_mask = osa.sa_mask;
                sa32.netbsd32_sa_flags = osa.sa_flags;
                error = copyout(&sa32, SCARG_P32(uap, osa), sizeof(sa32));
                if (error)
                        return error;
        }
        return 0;
}

#ifndef __HAVE_MD_NETBSD32_SENDSIG      /* XXX paying for yesterday's sins */
#ifdef __HAVE_STRUCT_SIGCONTEXT
struct netbsd32_sendsig_sigcontext_16_hook_t netbsd32_sendsig_sigcontext_16_hook;
#endif

void
netbsd32_sendsig(const struct ksiginfo *ksi, const sigset_t *mask)
{
        struct sigacts *sa;
        int sig;

        sig = ksi->ksi_signo;
        sa = curproc->p_sigacts;

        switch (sa->sa_sigdesc[sig].sd_vers) {
#ifdef __HAVE_STRUCT_SIGCONTEXT
        case __SIGTRAMP_SIGCODE_VERSION:
        case __SIGTRAMP_SIGCONTEXT_VERSION_MIN ...
             __SIGTRAMP_SIGCONTEXT_VERSION_MAX:
                /* Compat for 1.6 and earlier. */
                MODULE_HOOK_CALL_VOID(netbsd32_sendsig_sigcontext_16_hook,
                    (ksi, mask), break);
                return;
#endif /* __HAVE_STRUCT_SIGCONTEXT */
        case __SIGTRAMP_SIGINFO_VERSION_MIN ...
             __SIGTRAMP_SIGINFO_VERSION_MAX:
                netbsd32_sendsig_siginfo(ksi, mask);
                return;
        default:
                break;
        }

        printf("%s: bad version %d\n", __func__, sa->sa_sigdesc[sig].sd_vers);
        sigexit(curlwp, SIGILL);
}
#endif /* __HAVE_MD_NETBSD32_SENDSIG */

void
netbsd32_ksi32_to_ksi(struct _ksiginfo *si, const struct __ksiginfo32 *si32)
{
        size_t i;

        memset(si, 0, sizeof (*si));
        si->_signo = si32->_signo;
        si->_code = si32->_code;
        si->_errno = si32->_errno;

        if (si32->_code == SI_NOINFO)
                return;
        else if (si32->_code <= 0)      /* codes described in siginfo(2) */
                goto fill_rt;

        switch (si32->_signo) {
        case SIGILL:
        case SIGFPE:
        case SIGBUS:
        case SIGSEGV:
fill_fault:
                si->_reason._fault._addr =
                    NETBSD32IPTR64(si32->_reason._fault._addr);
                si->_reason._fault._trap = si32->_reason._fault._trap;
                break;
        case SIGTRAP:
                switch (si32->_code) {
                case TRAP_EXEC:
                        break;
                case TRAP_CHLD:
                case TRAP_LWP:
                        si->_reason._ptrace_state._pe_report_event =
                            si32->_reason._ptrace_state._pe_report_event;
CTASSERT(sizeof(si->_reason._ptrace_state._option._pe_other_pid) ==
    sizeof(si->_reason._ptrace_state._option._pe_lwp));
                        si->_reason._ptrace_state._option._pe_other_pid =
                            si32->_reason._ptrace_state._option._pe_other_pid;
                        break;
                case TRAP_SCE:
                case TRAP_SCX:
                        si->_reason._syscall._sysnum =
                            si32->_reason._syscall._sysnum;
                        si->_reason._syscall._retval[0] =
                            si32->_reason._syscall._retval[0];
                        si->_reason._syscall._retval[1] =
                            si32->_reason._syscall._retval[1];
                        si->_reason._syscall._error =
                            si32->_reason._syscall._error;
                        for (i = 0;
                            i < __arraycount(si->_reason._syscall._args); i++)
                                si->_reason._syscall._args[i] =
                                    si32->_reason._syscall._args[i];
                        break;
                default:
                        goto fill_fault;
                }
                break;
        case SIGALRM:
        case SIGVTALRM:
        case SIGPROF:
        default:        /* see sigqueue() and kill1() */
fill_rt:
                si->_reason._rt._pid = si32->_reason._rt._pid;
                si->_reason._rt._uid = si32->_reason._rt._uid;
                si->_reason._rt._value.sival_int =
                    si32->_reason._rt._value.sival_int;
                break;
        case SIGURG:
        case SIGIO:
                si->_reason._poll._band = si32->_reason._poll._band;
                si->_reason._poll._fd = si32->_reason._poll._fd;
                break;
        case SIGCHLD:
                si->_reason._child._pid = si32->_reason._child._pid;
                si->_reason._child._uid = si32->_reason._child._uid;
                si->_reason._child._status = si32->_reason._child._status;
                si->_reason._child._utime = si32->_reason._child._utime;
                si->_reason._child._stime = si32->_reason._child._stime;
                break;
        }
}

void
netbsd32_si32_to_si(siginfo_t *si, const siginfo32_t *si32)
{

        memset(si, 0, sizeof (*si));
        netbsd32_ksi32_to_ksi(&si->_info, &si32->_info);
}

static void
netbsd32_ksi_to_ksi32(struct __ksiginfo32 *si32, const struct _ksiginfo *si)
{
        size_t i;

        memset(si32, 0, sizeof (*si32));
        si32->_signo = si->_signo;
        si32->_code = si->_code;
        si32->_errno = si->_errno;

        if (si->_code == SI_NOINFO)
                return;
        else if (si->_code <= 0)        /* codes described in siginfo(2) */
                goto fill_rt;

        switch (si->_signo) {
        case SIGILL:
        case SIGFPE:
        case SIGBUS:
        case SIGSEGV:
fill_fault:
                si32->_reason._fault._addr =
                    NETBSD32PTR32I(si->_reason._fault._addr);
                si32->_reason._fault._trap = si->_reason._fault._trap;
                break;
        case SIGTRAP:
                switch (si->_code) {
                case TRAP_EXEC:
                        break;
                case TRAP_CHLD:
                case TRAP_LWP:
                        si32->_reason._ptrace_state._pe_report_event =
                            si->_reason._ptrace_state._pe_report_event;
CTASSERT(sizeof(si32->_reason._ptrace_state._option._pe_other_pid) ==
    sizeof(si32->_reason._ptrace_state._option._pe_lwp));
                        si32->_reason._ptrace_state._option._pe_other_pid =
                            si->_reason._ptrace_state._option._pe_other_pid;
                        break;
                case TRAP_SCE:
                case TRAP_SCX:
                        si32->_reason._syscall._sysnum =
                            si->_reason._syscall._sysnum;
                        si32->_reason._syscall._retval[0] =
                            si->_reason._syscall._retval[0];
                        si32->_reason._syscall._retval[1] =
                            si->_reason._syscall._retval[1];
                        si32->_reason._syscall._error =
                            si->_reason._syscall._error;
                        for (i = 0;
                            i < __arraycount(si->_reason._syscall._args); i++)
                                si32->_reason._syscall._args[i] =
                                    si->_reason._syscall._args[i];
                        break;
                default:
                        goto fill_fault;
                }
                break;
        case SIGALRM:
        case SIGVTALRM:
        case SIGPROF:
        default:        /* see sigqueue() and kill1() */
fill_rt:
                si32->_reason._rt._pid = si->_reason._rt._pid;
                si32->_reason._rt._uid = si->_reason._rt._uid;
                si32->_reason._rt._value.sival_int =
                    si->_reason._rt._value.sival_int;
                break;
        case SIGURG:
        case SIGIO:
                si32->_reason._poll._band = si->_reason._poll._band;
                si32->_reason._poll._fd = si->_reason._poll._fd;
                break;
        case SIGCHLD:
                si32->_reason._child._pid = si->_reason._child._pid;
                si32->_reason._child._uid = si->_reason._child._uid;
                si32->_reason._child._status = si->_reason._child._status;
                si32->_reason._child._utime = si->_reason._child._utime;
                si32->_reason._child._stime = si->_reason._child._stime;
                break;
        }
}

void
netbsd32_si_to_si32(siginfo32_t *si32, const siginfo_t *si)
{

        memset(si32, 0, sizeof (*si32));
        netbsd32_ksi_to_ksi32(&si32->_info, &si->_info);
}

void
getucontext32(struct lwp *l, ucontext32_t *ucp)
{
        struct proc *p = l->l_proc;

        KASSERT(mutex_owned(p->p_lock));

        ucp->uc_flags = 0;
        ucp->uc_link = (uint32_t)(intptr_t)l->l_ctxlink;
        ucp->uc_sigmask = l->l_sigmask;
        ucp->uc_flags |= _UC_SIGMASK;

        /*
         * The (unsupplied) definition of the `current execution stack'
         * in the System V Interface Definition appears to allow returning
         * the main context stack.
         */
        if ((l->l_sigstk.ss_flags & SS_ONSTACK) == 0) {
                ucp->uc_stack.ss_sp = USRSTACK32;
                ucp->uc_stack.ss_size = ctob(p->p_vmspace->vm_ssize);
                ucp->uc_stack.ss_flags = 0;     /* XXX, def. is Very Fishy */
        } else {
                /* Simply copy alternate signal execution stack. */
                ucp->uc_stack.ss_sp =
                    (uint32_t)(intptr_t)l->l_sigstk.ss_sp;
                ucp->uc_stack.ss_size = l->l_sigstk.ss_size;
                ucp->uc_stack.ss_flags = l->l_sigstk.ss_flags;
        }
        ucp->uc_flags |= _UC_STACK;
        mutex_exit(p->p_lock);
        cpu_getmcontext32(l, &ucp->uc_mcontext, &ucp->uc_flags);
        mutex_enter(p->p_lock);
}

int
netbsd32_getcontext(struct lwp *l, const struct netbsd32_getcontext_args *uap, register_t *retval)
{
        /* {
                syscallarg(netbsd32_ucontextp) ucp;
        } */
        struct proc *p = l->l_proc;
        ucontext32_t uc;

        memset(&uc, 0, sizeof(uc));

        mutex_enter(p->p_lock);
        getucontext32(l, &uc);
        mutex_exit(p->p_lock);

        return copyout(&uc, SCARG_P32(uap, ucp), sizeof (ucontext32_t));
}

int
setucontext32(struct lwp *l, const ucontext32_t *ucp)
{
        struct proc *p = l->l_proc;
        int error;

        KASSERT(mutex_owned(p->p_lock));

        if ((ucp->uc_flags & _UC_SIGMASK) != 0) {
                error = sigprocmask1(l, SIG_SETMASK, &ucp->uc_sigmask, NULL);
                if (error != 0)
                        return error;
        }

        mutex_exit(p->p_lock);
        error = cpu_setmcontext32(l, &ucp->uc_mcontext, ucp->uc_flags);
        mutex_enter(p->p_lock);
        if (error != 0)
                return error;

        l->l_ctxlink = (void *)(intptr_t)ucp->uc_link;

        /*
         * If there was stack information, update whether or not we are
         * still running on an alternate signal stack.
         */
        if ((ucp->uc_flags & _UC_STACK) != 0) {
                if (ucp->uc_stack.ss_flags & SS_ONSTACK)
                        l->l_sigstk.ss_flags |= SS_ONSTACK;
                else
                        l->l_sigstk.ss_flags &= ~SS_ONSTACK;
        }

        return 0;
}

/* ARGSUSED */
int
netbsd32_setcontext(struct lwp *l, const struct netbsd32_setcontext_args *uap, register_t *retval)
{
        /* {
                syscallarg(netbsd32_ucontextp) ucp;
        } */
        ucontext32_t uc;
        int error;
        struct proc *p = l->l_proc;

        error = copyin(SCARG_P32(uap, ucp), &uc, sizeof (uc));
        if (error)
                return error;
        if (!(uc.uc_flags & _UC_CPU))
                return EINVAL;
        mutex_enter(p->p_lock);
        error = setucontext32(l, &uc);
        mutex_exit(p->p_lock);
        if (error)
                return error;

        return EJUSTRETURN;
}

static int
netbsd32_sigtimedwait_put_info(const void *src, void *dst, size_t size)
{
        const siginfo_t *info = src;
        siginfo32_t info32;

        netbsd32_si_to_si32(&info32, info);

        return copyout(&info32, dst, sizeof(info32));
}

static int
netbsd32_sigtimedwait_fetch_timeout(const void *src, void *dst, size_t size)
{
        struct timespec *ts = dst;
        struct netbsd32_timespec ts32;
        int error;

        error = copyin(src, &ts32, sizeof(ts32));
        if (error)
                return error;

        netbsd32_to_timespec(&ts32, ts);
        return 0;
}

static int
netbsd32_sigtimedwait_put_timeout(const void *src, void *dst, size_t size)
{
        const struct timespec *ts = src;
        struct netbsd32_timespec ts32;

        netbsd32_from_timespec(ts, &ts32);

        return copyout(&ts32, dst, sizeof(ts32));
}

int
netbsd32_____sigtimedwait50(struct lwp *l, const struct netbsd32_____sigtimedwait50_args *uap, register_t *retval)
{
        /* {
                syscallarg(netbsd32_sigsetp_t) set;
                syscallarg(netbsd32_siginfop_t) info;
                syscallarg(netbsd32_timespec50p_t) timeout;
        } */
        struct sys_____sigtimedwait50_args ua;

        NETBSD32TOP_UAP(set, const sigset_t);
        NETBSD32TOP_UAP(info, siginfo_t);
        NETBSD32TOP_UAP(timeout, struct timespec);

        return sigtimedwait1(l, &ua, retval,
            copyin,
            netbsd32_sigtimedwait_put_info,
            netbsd32_sigtimedwait_fetch_timeout,
            netbsd32_sigtimedwait_put_timeout);
}

int
netbsd32_sigqueueinfo(struct lwp *l,
    const struct netbsd32_sigqueueinfo_args *uap, register_t *retval)
{
        /* {
                syscallarg(pid_t) pid;
                syscallarg(const netbsd32_siginfop_t) info;
        } */
        struct __ksiginfo32 ksi32;
        ksiginfo_t ksi;
        int error;

        if ((error = copyin(SCARG_P32(uap, info), &ksi32,
            sizeof(ksi32))) != 0)
                return error;

        KSI_INIT(&ksi);
        netbsd32_ksi32_to_ksi(&ksi.ksi_info, &ksi32);

        return kill1(l, SCARG(uap, pid), &ksi, retval);
}

struct netbsd32_ktr_psig {
        int                     signo;
        netbsd32_pointer_t      action;
        sigset_t                mask;
        int                     code;
        /* and optional siginfo_t */
};

#ifdef notyet
#ifdef KTRACE
void
netbsd32_ktrpsig(int sig, sig_t action, const sigset_t *mask,
         const ksiginfo_t *ksi)
{
        struct ktrace_entry *kte;
        lwp_t *l = curlwp;
        struct {
                struct netbsd32_ktr_psig        kp;
                siginfo32_t                     si;
        } *kbuf;

        if (!KTRPOINT(l->l_proc, KTR_PSIG))
                return;

        if (ktealloc(&kte, (void *)&kbuf, l, KTR_PSIG, sizeof(*kbuf)))
                return;

        kbuf->kp.signo = (char)sig;
        NETBSD32PTR32(kbuf->kp.action, action);
        kbuf->kp.mask = *mask;

        if (ksi) {
                kbuf->kp.code = KSI_TRAPCODE(ksi);
                (void)memset(&kbuf->si, 0, sizeof(kbuf->si));
                netbsd32_ksi_to_ksi32(&kbuf->si._info, &ksi->ksi_info);
                ktesethdrlen(kte, sizeof(*kbuf));
        } else {
                kbuf->kp.code = 0;
                ktesethdrlen(kte, sizeof(struct netbsd32_ktr_psig));
        }

        ktraddentry(l, kte, KTA_WAITOK);
}
#endif
#endif