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NetBSD/sys/compat/irix/irix_signal.c

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/* $NetBSD: irix_signal.c,v 1.3 2001/12/26 11:04:20 manu Exp $ */
/*-
* Copyright (c) 1994, 2001 The NetBSD Foundation, Inc.
* All rights reserved.
*
* This code is derived from software contributed to The NetBSD Foundation
* by Christos Zoulas and Emmanuel Dreyfus.
*
* 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.
* 3. All advertising materials mentioning features or use of this software
* must display the following acknowledgement:
* This product includes software developed by the NetBSD
* Foundation, Inc. and its contributors.
* 4. Neither the name of The NetBSD Foundation nor the names of its
* contributors may be used to endorse or promote products derived
* from this software without specific prior written permission.
*
* THIS SOFTWARE IS PROVIDED BY THE NETBSD FOUNDATION, INC. AND CONTRIBUTORS
* ``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 FOUNDATION OR CONTRIBUTORS
* 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: irix_signal.c,v 1.3 2001/12/26 11:04:20 manu Exp $");
#include <sys/types.h>
#include <sys/signal.h>
#include <sys/param.h>
#include <sys/kernel.h>
#include <sys/pool.h>
#include <sys/ptrace.h>
#include <sys/proc.h>
#include <sys/resourcevar.h>
#include <sys/systm.h>
#include <sys/vnode.h>
#include <sys/wait.h>
#include <machine/regnum.h>
#include <compat/svr4/svr4_types.h>
#include <compat/svr4/svr4_wait.h>
#include <compat/irix/irix_signal.h>
#include <compat/irix/irix_syscallargs.h>
extern const int native_to_svr4_sig[];
extern const int svr4_to_native_sig[];
static int irix_setinfo __P((struct proc *, int, irix_irix5_siginfo_t *));
#define irix_sigmask(n) (1 << (((n) - 1) & 31))
#define irix_sigword(n) (((n) - 1) >> 5)
#define irix_sigemptyset(s) memset((s), 0, sizeof(*(s)))
#define irix_sigismember(s, n) ((s)->bits[irix_sigword(n)] & irix_sigmask(n))
#define irix_sigaddset(s, n) ((s)->bits[irix_sigword(n)] |= irix_sigmask(n))
/*
* This is ripped from svr4_setinfo. See irix_sys_waitsys...
*/
int
irix_setinfo(p, st, s)
struct proc *p;
int st;
irix_irix5_siginfo_t *s;
{
irix_irix5_siginfo_t i;
int sig;
memset(&i, 0, sizeof(i));
i.isi_signo = SVR4_SIGCHLD;
i.isi_errno = 0; /* XXX? */
if (p) {
i.isi_pid = p->p_pid;
if (p->p_stat == SZOMB) {
i.isi_stime = p->p_ru->ru_stime.tv_sec;
i.isi_utime = p->p_ru->ru_utime.tv_sec;
}
else {
i.isi_stime = p->p_stats->p_ru.ru_stime.tv_sec;
i.isi_utime = p->p_stats->p_ru.ru_utime.tv_sec;
}
}
if (WIFEXITED(st)) {
i.isi_status = WEXITSTATUS(st);
i.isi_code = SVR4_CLD_EXITED;
} else if (WIFSTOPPED(st)) {
sig = WSTOPSIG(st);
if (sig >= 0 && sig < NSIG)
i.isi_status = native_to_svr4_sig[sig];
if (i.isi_status == SVR4_SIGCONT)
i.isi_code = SVR4_CLD_CONTINUED;
else
i.isi_code = SVR4_CLD_STOPPED;
} else {
sig = WTERMSIG(st);
if (sig >= 0 && sig < NSIG)
i.isi_status = native_to_svr4_sig[sig];
if (WCOREDUMP(st))
i.isi_code = SVR4_CLD_DUMPED;
else
i.isi_code = SVR4_CLD_KILLED;
}
return copyout(&i, s, sizeof(i));
}
void
native_to_irix_sigset(bss, sss)
const sigset_t *bss;
irix_sigset_t *sss;
{
int i, newsig;
irix_sigemptyset(sss);
for (i = 1; i < NSIG; i++) {
if (sigismember(bss, i)) {
newsig = native_to_svr4_sig[i];
if (newsig)
irix_sigaddset(sss, newsig);
}
}
}
void
irix_to_native_sigset(sss, bss)
const irix_sigset_t *sss;
sigset_t *bss;
{
int i, newsig;
sigemptyset(bss);
for (i = 1; i < SVR4_NSIG; i++) {
if (irix_sigismember(sss, i)) {
newsig = svr4_to_native_sig[i];
if (newsig)
sigaddset(bss, newsig);
}
}
}
void
irix_sendsig(catcher, sig, mask, code) /* XXX Check me */
sig_t catcher;
int sig;
sigset_t *mask;
u_long code;
{
struct proc *p = curproc;
struct irix_sigframe *fp;
struct frame *f;
int i,onstack;
struct irix_sigframe sf;
#ifdef DEBUG_IRIX
printf("irix_sendsig()\n");
#endif /* DEBUG_IRIX */
f = (struct frame *)p->p_md.md_regs;
/*
* Do we need to jump onto the signal stack?
*/
onstack =
(p->p_sigctx.ps_sigstk.ss_flags & (SS_DISABLE | SS_ONSTACK)) == 0 &&
(SIGACTION(p, sig).sa_flags & SA_ONSTACK) != 0;
/*
* not sure it works yet.
*/
onstack=0;
/*
* Allocate space for the signal handler context.
*/
if (onstack)
fp = (struct irix_sigframe *)
((caddr_t)p->p_sigctx.ps_sigstk.ss_sp
+ p->p_sigctx.ps_sigstk.ss_size);
else
/* cast for _MIPS_BSD_API == _MIPS_BSD_API_LP32_64CLEAN case */
fp = (struct irix_sigframe *)(u_int32_t)f->f_regs[SP];
/*
* Build stack frame for signal trampoline.
*/
memset(&sf, 0, sizeof sf);
native_to_irix_sigset(mask, &sf.isf_sc.isc_sigset);
for (i=0; i<32; i++) {
sf.isf_sc.isc_regs[i] = f->f_regs[i];
}
sf.isf_sc.isc_regs[0] = 0;
sf.isf_sc.isc_fp_rounded_result = 0;
sf.isf_sc.isc_regmask = ~0x1UL;
sf.isf_sc.isc_mdhi = f->f_regs[MULHI];
sf.isf_sc.isc_mdlo = f->f_regs[MULLO];
sf.isf_sc.isc_pc = f->f_regs[PC];
sf.isf_sc.isc_status = f->f_regs[SR]; /* XXX */
sf.isf_sc.isc_cause = f->f_regs[CAUSE];
sf.isf_sc.isc_badvaddr = f->f_regs[BADVADDR]; /* XXX */
sf.isf_sc.isc_ownedfp = 0;
sf.isf_sc.isc_ssflags = 0;
/*
* Save signal stack. XXX broken
*/
/* kregs.sc_onstack = p->p_sigctx.ps_sigstk.ss_flags & SS_ONSTACK; */
/*
* Install the sigframe onto the stack
*/
fp = (struct irix_sigframe *)((unsigned long)fp
- sizeof(struct irix_sigframe));
fp = (struct irix_sigframe *)((unsigned long)fp
& ~0xfUL); /* 16 bytes alignement */
if (copyout(&sf, fp, sizeof(sf)) != 0) {
/*
* Process has trashed its stack; give it an illegal
* instruction to halt it in its tracks.
*/
#ifdef DEBUG_IRIX
printf("irix_sendsig: stack trashed\n");
#endif /* DEBUG_IRIX */
sigexit(p, SIGILL);
/* NOTREACHED */
}
/* Set up the registers to return to sigcode. */
f->f_regs[A0] = native_to_svr4_sig[sig];
f->f_regs[A1] = 0;
f->f_regs[A2] = (unsigned long)&fp->isf_sc;
#ifdef DEBUG_IRIX
printf("sigcontext is at %p\n", &fp->isf_sc);
#endif /* DEBUG_IRIX */
f->f_regs[RA] = (unsigned long)p->p_sigctx.ps_sigcode;
f->f_regs[SP] = (unsigned long)fp;
f->f_regs[T9] = (unsigned long)catcher;
f->f_regs[A3] = (unsigned long)catcher;
f->f_regs[PC] = (unsigned long)catcher;
/* Remember that we're now on the signal stack. */
if (onstack)
p->p_sigctx.ps_sigstk.ss_flags |= SS_ONSTACK;
#ifdef DEBUG_IRIX
printf("returning from irix_sendsig()\n");
#endif
return;
}
int
irix_sys_sigreturn(p, v, retval)
struct proc *p;
void *v;
register_t *retval;
{
struct irix_sys_sigreturn_args /* {
syscallarg(struct irix_sigframe *) sf;
} */ *uap = v;
struct irix_sigframe *sf, ksf;
struct frame *f;
sigset_t mask;
int i, error;
#ifdef DEBUG_IRIX
printf("irix_sys_sigreturn()\n");
#endif /* DEBUG_IRIX */
/*
* The trampoline code hands us the context.
* It is unsafe to keep track of it ourselves, in the event that a
* program jumps out of a signal handler.
*/
sf = SCARG(uap, sf);
if ((error = copyin(sf, &ksf, sizeof(ksf))) != 0)
return (error);
/* Restore the register context. */
f = (struct frame *)p->p_md.md_regs;
for (i=0; i<32; i++)
f->f_regs[i] = ksf.isf_sc.isc_regs[i];
f->f_regs[MULLO] = ksf.isf_sc.isc_mdlo;
f->f_regs[MULHI] = ksf.isf_sc.isc_mdhi;
f->f_regs[PC] = ksf.isf_sc.isc_pc;
f->f_regs[BADVADDR] = ksf.isf_sc.isc_badvaddr;
f->f_regs[CAUSE] = ksf.isf_sc.isc_cause;
f->f_regs[SR] = ksf.isf_sc.isc_status;
/* Restore signal stack. */
p->p_sigctx.ps_sigstk.ss_flags &= ~SS_ONSTACK;
/* Restore signal mask. */
irix_to_native_sigset((irix_sigset_t *)&ksf.isf_sc.isc_sigset, &mask);
(void)sigprocmask1(p, SIG_SETMASK, &mask, 0);
return (EJUSTRETURN);
}
int
irix_sys_sginap(p, v, retval)
struct proc *p;
void *v;
register_t *retval;
{
struct irix_sys_sginap_args /* {
syscallarg(long) ticks;
} */ *uap = v;
int rticks = SCARG(uap, ticks);
struct timeval tvb, tve, tvd;
long long delta;
int dontcare;
if (rticks != 0)
microtime(&tvb);
if ((tsleep(&dontcare, PCATCH, 0, rticks) != 0) && (rticks != 0)) {
microtime(&tve);
timersub(&tve, &tvb, &tvd);
delta = ((tvd.tv_sec * 1000000) + tvd.tv_usec); /* XXX */
*retval = (register_t)(rticks - (delta / tick));
}
return 0;
}
/*
* XXX Untested. Expect bugs and security problems here
*/
int
irix_sys_getcontext(p, v, retval)
struct proc *p;
void *v;
register_t *retval;
{
struct irix_sys_getcontext_args /* {
syscallarg(struct irix_ucontext *) ucp;
} */ *uap = v;
struct frame *f;
struct irix_ucontext kucp;
int i, error;
f = (struct frame *)p->p_md.md_regs;
kucp.iuc_flags = IRIX_UC_ALL;
kucp.iuc_link = NULL; /* XXX */
native_to_irix_sigset(&p->p_sigctx.ps_sigmask, &kucp.iuc_sigmask);
kucp.iuc_stack.ss_sp = p->p_sigctx.ps_sigstk.ss_sp;
kucp.iuc_stack.ss_size = p->p_sigctx.ps_sigstk.ss_size;
kucp.iuc_stack.ss_flags = 0;
if (p->p_sigctx.ps_sigstk.ss_flags & SS_ONSTACK)
kucp.iuc_stack.ss_flags &= IRIX_SS_ONSTACK;
if (p->p_sigctx.ps_sigstk.ss_flags & SS_DISABLE)
kucp.iuc_stack.ss_flags &= IRIX_SS_DISABLE;
for (i = 0; i < 36; i++) /* Is order correct? */
kucp.iuc_mcontext.svr4___gregs[i] = f->f_regs[i];
for (i = 0; i < 32; i++)
kucp.iuc_mcontext.svr4___fpregs.svr4___fp_r.svr4___fp_regs[i]
= 0; /* XXX where are FP registers? */
for (i = 0; i < 47; i++)
kucp.iuc_filler[i] = 0; /* XXX */
kucp.iuc_triggersave = 0; /* XXX */
error = copyout(&kucp, SCARG(uap, ucp), sizeof(kucp));
return error;
}
/*
* XXX Untested. Expect bugs and security problems here
*/
int
irix_sys_setcontext(p, v, retval)
struct proc *p;
void *v;
register_t *retval;
{
struct irix_sys_setcontext_args /* {
syscallarg(struct irix_ucontext *) ucp;
} */ *uap = v;
struct frame *f;
struct irix_ucontext kucp;
int i, error;
error = copyin(SCARG(uap, ucp), &kucp, sizeof(kucp));
if (error)
goto out;
f = (struct frame *)p->p_md.md_regs;
if (kucp.iuc_flags & IRIX_UC_SIGMASK)
irix_to_native_sigset(&kucp.iuc_sigmask,
&p->p_sigctx.ps_sigmask);
if (kucp.iuc_flags & IRIX_UC_STACK) {
p->p_sigctx.ps_sigstk.ss_sp = kucp.iuc_stack.ss_sp;
p->p_sigctx.ps_sigstk.ss_size =
(unsigned long)kucp.iuc_stack.ss_sp;
p->p_sigctx.ps_sigstk.ss_flags = 0;
if (kucp.iuc_stack.ss_flags & IRIX_SS_ONSTACK)
p->p_sigctx.ps_sigstk.ss_flags &= SS_ONSTACK;
if (kucp.iuc_stack.ss_flags & IRIX_SS_DISABLE)
p->p_sigctx.ps_sigstk.ss_flags &= SS_DISABLE;
}
if (kucp.iuc_flags & IRIX_UC_CPU)
for (i = 0; i < 36; i++) /* Is register order right? */
f->f_regs[i] = kucp.iuc_mcontext.svr4___gregs[i];
if (kucp.iuc_flags & IRIX_UC_MAU) { /* XXX */
#ifdef DEBUG_IRIX
printf("irix_sys_setcontext(): IRIX_UC_MAU requested\n");
#endif
}
out:
return error;
}
/*
* The following code is from svr4_sys_waitsys(), with a few lines added
* for supporting the rusage argument which is present in the IRIX version
* and not in the SVR4 version.
* Both version could be merged by creating a svr4_sys_waitsys1() with the
* rusage argument, and by calling it with NULL from svr4_sys_waitsys().
* irix_setinfo is here because 1) svr4_setinfo is static and cannot be
* used here and 2) because struct irix_irix5_siginfo is quite different
* from svr4_siginfo. In order to merge, we need to include irix_signal.h
* from svr4_misc.c, or push the irix_irix5_siginfo into svr4_siginfo.h
*/
int
irix_sys_waitsys(p, v, retval)
struct proc *p;
void *v;
register_t *retval;
{
struct irix_sys_waitsys_args /* {
syscallarg(int) type;
syscallarg(int) pid;
syscallarg(struct irix_irix5_siginfo *) info;
syscallarg(int) options;
syscallarg(struct rusage *) ru;
} */ *uap = v;
int nfound, error, s;
struct proc *q, *t;
switch (SCARG(uap, type)) {
case SVR4_P_PID:
break;
case SVR4_P_PGID:
SCARG(uap, pid) = -p->p_pgid;
break;
case SVR4_P_ALL:
SCARG(uap, pid) = WAIT_ANY;
break;
default:
return EINVAL;
}
#ifdef DEBUG_IRIX
printf("waitsys(%d, %d, %p, %x)\n",
SCARG(uap, type), SCARG(uap, pid),
SCARG(uap, info), SCARG(uap, options));
#endif
loop:
nfound = 0;
for (q = p->p_children.lh_first; q != 0; q = q->p_sibling.le_next) {
if (SCARG(uap, pid) != WAIT_ANY &&
q->p_pid != SCARG(uap, pid) &&
q->p_pgid != -SCARG(uap, pid)) {
#ifdef DEBUG_IRIX
printf("pid %d pgid %d != %d\n", q->p_pid,
q->p_pgid, SCARG(uap, pid));
#endif
continue;
}
nfound++;
if (q->p_stat == SZOMB &&
((SCARG(uap, options) & (SVR4_WEXITED|SVR4_WTRAPPED)))) {
*retval = 0;
#ifdef DEBUG_IRIX
printf("found %d\n", q->p_pid);
#endif
if ((error = irix_setinfo(q, q->p_xstat,
SCARG(uap, info))) != 0)
return error;
if ((SCARG(uap, options) & SVR4_WNOWAIT)) {
#ifdef DEBUG_IRIX
printf(("Don't wait\n"));
#endif
return 0;
}
if (SCARG(uap, ru) &&
(error = copyout((caddr_t)p->p_ru,
(caddr_t)SCARG(uap, ru),
sizeof(struct rusage))))
return (error);
/*
* If we got the child via ptrace(2) or procfs, and
* the parent is different (meaning the process was
* attached, rather than run as a child), then we need
* to give it back to the old parent, and send the
* parent a SIGCHLD. The rest of the cleanup will be
* done when the old parent waits on the child.
*/
if ((q->p_flag & P_TRACED) &&
q->p_oppid != q->p_pptr->p_pid) {
t = pfind(q->p_oppid);
proc_reparent(q, t ? t : initproc);
q->p_oppid = 0;
q->p_flag &= ~(P_TRACED|P_WAITED|P_FSTRACE);
psignal(q->p_pptr, SIGCHLD);
wakeup((caddr_t)q->p_pptr);
return (0);
}
q->p_xstat = 0;
ruadd(&p->p_stats->p_cru, q->p_ru);
pool_put(&rusage_pool, q->p_ru);
/*
* Finally finished with old proc entry.
* Unlink it from its process group and free it.
*/
leavepgrp(q);
s = proclist_lock_write();
LIST_REMOVE(q, p_list); /* off zombproc */
proclist_unlock_write(s);
LIST_REMOVE(q, p_sibling);
/*
* Decrement the count of procs running with this uid.
*/
(void)chgproccnt(q->p_cred->p_ruid, -1);
/*
* Free up credentials.
*/
if (--q->p_cred->p_refcnt == 0) {
crfree(q->p_cred->pc_ucred);
pool_put(&pcred_pool, q->p_cred);
}
/*
* Release reference to text vnode
*/
if (q->p_textvp)
vrele(q->p_textvp);
pool_put(&proc_pool, q);
nprocs--;
return 0;
}
if (q->p_stat == SSTOP && (q->p_flag & P_WAITED) == 0 &&
(q->p_flag & P_TRACED ||
(SCARG(uap, options) & (SVR4_WSTOPPED|SVR4_WCONTINUED)))) {
#ifdef DEBUG_IRIX
printf("jobcontrol %d\n", q->p_pid);
#endif
if (((SCARG(uap, options) & SVR4_WNOWAIT)) == 0)
q->p_flag |= P_WAITED;
*retval = 0;
return irix_setinfo(q, W_STOPCODE(q->p_xstat),
SCARG(uap, info));
}
}
if (nfound == 0)
return ECHILD;
if (SCARG(uap, options) & SVR4_WNOHANG) {
*retval = 0;
if ((error = irix_setinfo(NULL, 0, SCARG(uap, info))) != 0)
return error;
return 0;
}
if ((error = tsleep((caddr_t)p, PWAIT | PCATCH, "svr4_wait", 0)) != 0)
return error;
goto loop;
}
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