NetBSD-5.0.2/sys/arch/sparc64/sparc64/sunos32_machdep.c
/* $NetBSD: sunos32_machdep.c,v 1.28 2008/07/10 15:04:42 nakayama Exp $ */
/* from: NetBSD: sunos_machdep.c,v 1.14 2001/01/29 01:37:56 mrg Exp */
/*
* Copyright (c) 1995, 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: sunos32_machdep.c,v 1.28 2008/07/10 15:04:42 nakayama Exp $");
#ifdef _KERNEL_OPT
#include "opt_ddb.h"
#include "firm_events.h"
#endif
#include <sys/param.h>
#include <sys/exec.h>
#include <sys/systm.h>
#include <sys/proc.h>
#include <sys/namei.h>
#include <sys/user.h>
#include <sys/filedesc.h>
#include <sys/ioctl.h>
#include <sys/mount.h>
#include <sys/kernel.h>
#include <sys/signal.h>
#include <sys/signalvar.h>
#include <sys/select.h>
#include <sys/syscallargs.h>
#include <compat/sunos/sunos.h>
#include <compat/sunos/sunos_syscallargs.h>
#include <compat/netbsd32/netbsd32.h>
#include <compat/sunos32/sunos32.h>
#include <compat/sunos32/sunos32_syscallargs.h>
#include <compat/sunos32/sunos32_exec.h>
#include <compat/sys/signal.h>
#include <compat/sys/signalvar.h>
#include <machine/frame.h>
#include <machine/cpu.h>
#include <machine/vuid_event.h>
#include <machine/reg.h>
#include <dev/sun/event_var.h>
#ifdef DEBUG
#include <sparc64/sparc64/sigdebug.h>
#endif
struct sunos32_sigcontext {
uint32_t sc_onstack; /* sigstack state to restore */
uint32_t sc_mask; /* signal mask to restore (old style) */
/* begin machine dependent portion */
uint32_t sc_sp; /* %sp to restore */
uint32_t sc_pc; /* pc to restore */
uint32_t sc_npc; /* npc to restore */
uint32_t sc_psr; /* pstate to restore */
uint32_t sc_g1; /* %g1 to restore */
uint32_t sc_o0; /* %o0 to restore */
};
struct sunos32_sigframe {
uint32_t sf_signo; /* signal number */
uint32_t sf_code; /* code */
uint32_t sf_scp; /* SunOS user addr of sigcontext */
uint32_t sf_addr; /* SunOS compat, always 0 for now */
struct sunos32_sigcontext sf_sc; /* actual sigcontext */
};
#if NFIRM_EVENTS > 0
static int ev_out32(struct firm_event *, int, struct uio *);
#endif
/*
* Set up registers on exec.
*
* XXX this entire mess must be fixed
*/
/* ARGSUSED */
void
sunos32_setregs(l, pack, stack)
struct lwp *l;
struct exec_package *pack;
u_long stack; /* XXX */
{
struct trapframe64 *tf = l->l_md.md_tf;
struct fpstate64 *fs;
int64_t tstate;
struct proc *p = l->l_proc;
/* Don't allow misaligned code by default */
p->p_md.md_flags &= ~MDP_FIXALIGN;
/* Mark this as a 32-bit emulation */
mutex_enter(p->p_lock);
p->p_flag |= PK_32;
mutex_exit(p->p_lock);
/* Setup the ev_out32 hook */
#if NFIRM_EVENTS > 0
if (ev_out32_hook == NULL)
ev_out32_hook = ev_out32;
#endif
/*
* Set the registers to 0 except for:
* %o6: stack pointer, built in exec())
* %tstate: (retain icc and xcc and cwp bits)
* %g1: address of p->p_psstr (used by crt0)
* %tpc,%tnpc: entry point of program
*/
tstate = ((PSTATE_USER32)<<TSTATE_PSTATE_SHIFT)
| (tf->tf_tstate & TSTATE_CWP);
if ((fs = l->l_md.md_fpstate) != NULL) {
/*
* We hold an FPU state. If we own *the* FPU chip state
* we must get rid of it, and the only way to do that is
* to save it. In any case, get rid of our FPU state.
*/
if (l == fplwp) {
savefpstate(fs);
fplwp = NULL;
}
pool_cache_put(fpstate_cache, fs);
l->l_md.md_fpstate = NULL;
}
memset(tf, 0, sizeof *tf);
tf->tf_tstate = tstate;
tf->tf_global[1] = (u_int)(u_long)p->p_psstr;
tf->tf_pc = pack->ep_entry & ~3;
tf->tf_npc = tf->tf_pc + 4;
stack -= sizeof(struct rwindow32);
tf->tf_out[6] = stack;
tf->tf_out[7] = 0;
}
void
sunos32_sendsig(const ksiginfo_t *ksi, const sigset_t *mask)
{
int sig = ksi->ksi_signo;
struct lwp *l = curlwp; /* XXX */
struct proc *p = l->l_proc;
struct sunos32_sigframe *fp;
struct trapframe64 *tf;
struct rwindow32 *oldsp, *newsp;
struct sunos32_sigframe sf;
struct sunos32_sigcontext *scp;
uint32_t addr, oldsp32;
int onstack, error;
sig_t catcher = SIGACTION(p, sig).sa_handler;
tf = l->l_md.md_tf;
/* Need to attempt to zero extend this 32-bit pointer */
oldsp = (struct rwindow32 *)(u_long)(u_int)tf->tf_out[6];
oldsp32 = (uint32_t)(u_long)oldsp;
/*
* Compute new user stack addresses, subtract off
* one signal frame, and align.
*/
onstack =
(l->l_sigstk.ss_flags & (SS_DISABLE | SS_ONSTACK)) == 0 &&
(SIGACTION(p, sig).sa_flags & SA_ONSTACK) != 0;
if (onstack)
fp = (struct sunos32_sigframe *)
((char *)l->l_sigstk.ss_sp + l->l_sigstk.ss_size);
else
fp = (struct sunos32_sigframe *)oldsp;
fp = (struct sunos32_sigframe *)((u_long)(fp - 1) & ~7);
#ifdef DEBUG
sigpid = p->p_pid;
if ((sigdebug & SDB_KSTACK) && p->p_pid == sigpid) {
mutex_exit(p->p_lock);
printf("sunos32_sendsig: %s[%d] sig %d newusp %p scp %p oldsp %p\n",
p->p_comm, p->p_pid, sig, fp, &fp->sf_sc, oldsp);
#ifdef DDB
if (sigdebug & SDB_DDB) Debugger();
#endif
mutex_enter(p->p_lock);
}
#endif
/*
* Now set up the signal frame. We build it in kernel space
* and then copy it out. We probably ought to just build it
* directly in user space....
*/
sf.sf_signo = sig;
sf.sf_code = (uint32_t)ksi->ksi_trap;
scp = &fp->sf_sc;
if ((u_long)scp >= 0x100000000)
printf("sunos32_sendsig: sf_scp overflow %p > 0x100000000\n", scp);
sf.sf_scp = (uint32_t)(u_long)scp;
sf.sf_addr = 0; /* XXX */
/*
* Build the signal context to be used by sigreturn.
*/
sf.sf_sc.sc_onstack = l->l_sigstk.ss_flags & SS_ONSTACK;
native_sigset_to_sigset13(mask, &sf.sf_sc.sc_mask);
sf.sf_sc.sc_sp = (u_int)(u_long)oldsp;
sf.sf_sc.sc_pc = tf->tf_pc;
sf.sf_sc.sc_npc = tf->tf_npc;
sf.sf_sc.sc_psr = TSTATECCR_TO_PSR(tf->tf_tstate); /* XXX */
sf.sf_sc.sc_g1 = tf->tf_global[1];
sf.sf_sc.sc_o0 = tf->tf_out[0];
/*
* Put the stack in a consistent state before we whack away
* at it. Note that write_user_windows may just dump the
* registers into the pcb; we need them in the process's memory.
* We also need to make sure that when we start the signal handler,
* its %i6 (%fp), which is loaded from the newly allocated stack area,
* joins seamlessly with the frame it was in when the signal occurred,
* so that the debugger and _longjmp code can back up through it.
*/
sendsig_reset(l, sig);
mutex_exit(p->p_lock);
newsp = (struct rwindow32 *)((long)fp - sizeof(struct rwindow32));
write_user_windows();
#ifdef DEBUG
if ((sigdebug & SDB_KSTACK))
printf("sunos32_sendsig: saving sf to %p, setting stack pointer %p to %p\n",
fp, &(((struct rwindow32 *)newsp)->rw_in[6]), oldsp);
#endif
error = (rwindow_save(l) || copyout((void *)&sf, (void *)fp, sizeof sf) ||
copyout((void *)&oldsp32, &(((struct rwindow32 *)newsp)->rw_in[6]), sizeof oldsp32));
mutex_enter(p->p_lock);
if (error) {
/*
* Process has trashed its stack; give it an illegal
* instruction to halt it in its tracks.
*/
#ifdef DEBUG
mutex_exit(p->p_lock);
if ((sigdebug & SDB_KSTACK) && p->p_pid == sigpid)
printf("sunos32_sendsig: window save or copyout error\n");
printf("sunos32_sendsig: stack was trashed trying to send sig %d, sending SIGILL\n", sig);
#ifdef DDB
if (sigdebug & SDB_DDB) Debugger();
#endif
mutex_enter(p->p_lock);
#endif
sigexit(l, SIGILL);
/* NOTREACHED */
}
#ifdef DEBUG
if ((sigdebug & SDB_FOLLOW)) {
printf("sunos32_sendsig: %s[%d] sig %d scp %p\n",
p->p_comm, p->p_pid, sig, &fp->sf_sc);
}
#endif
/*
* Arrange to continue execution at the code copied out in exec().
* It needs the function to call in %g1, and a new stack pointer.
*/
addr = (uint32_t)(u_long)catcher; /* user does his own trampolining */
tf->tf_pc = addr;
tf->tf_npc = addr + 4;
tf->tf_out[6] = (uint64_t)(u_int)(u_long)newsp;
#ifdef DEBUG
if ((sigdebug & SDB_KSTACK) && p->p_pid == sigpid) {
mutex_exit(p->p_lock);
printf("sunos32_sendsig: about to return to catcher %p thru %p\n",
catcher, (void *)(u_long)addr);
#ifdef DDB
if (sigdebug & SDB_DDB) Debugger();
#endif
mutex_enter(p->p_lock);
}
#endif
}
int
sunos32_sys_sigreturn(struct lwp *l, const struct sunos32_sys_sigreturn_args *uap, register_t *retval)
{
/* {
syscallarg(netbsd32_sigcontextp_t) sigcntxp;
} */
struct proc *p = l->l_proc;
struct sunos32_sigcontext sc, *scp;
sigset_t mask;
struct trapframe64 *tf;
/* First ensure consistent stack state (see sendsig). */
write_user_windows();
if (rwindow_save(l)) {
mutex_enter(p->p_lock);
sigexit(l, SIGILL);
}
#ifdef DEBUG
if (sigdebug & SDB_FOLLOW) {
printf("sunos32_sigreturn: %s[%d], sigcntxp %p\n",
p->p_comm, p->p_pid, (void *)(u_long)SCARG(uap, sigcntxp));
#ifdef DDB
if (sigdebug & SDB_DDB) Debugger();
#endif
}
#endif
scp = (struct sunos32_sigcontext *)(u_long)SCARG(uap, sigcntxp);
if ((vaddr_t)scp & 3 || (copyin((void *)scp, &sc, sizeof sc) != 0))
return (EFAULT);
scp = ≻
tf = l->l_md.md_tf;
/*
* Only the icc bits in the psr are used, so it need not be
* verified. pc and npc must be multiples of 4. This is all
* that is required; if it holds, just do it.
*/
if (((scp->sc_pc | scp->sc_npc) & 3) != 0 || scp->sc_pc == 0 || scp->sc_npc == 0)
{
#ifdef DEBUG
printf("sunos32_sigreturn: pc %x or npc %x invalid\n", scp->sc_pc, scp->sc_npc);
#ifdef DDB
Debugger();
#endif
#endif
return (EINVAL);
}
/* take only psr ICC field */
tf->tf_tstate = (int64_t)(tf->tf_tstate & ~TSTATE_CCR) | PSRCC_TO_TSTATE(scp->sc_psr);
tf->tf_pc = scp->sc_pc;
tf->tf_npc = scp->sc_npc;
tf->tf_global[1] = scp->sc_g1;
tf->tf_out[0] = scp->sc_o0;
tf->tf_out[6] = scp->sc_sp;
#ifdef DEBUG
if (sigdebug & SDB_FOLLOW) {
printf("sunos32_sigreturn: return trapframe pc=%p sp=%p tstate=%llx\n",
(void *)(u_long)tf->tf_pc, (void *)(u_long)tf->tf_out[6], (unsigned long long)tf->tf_tstate);
#ifdef DDB
if (sigdebug & SDB_DDB) Debugger();
#endif
}
#endif
mutex_enter(p->p_lock);
if (scp->sc_onstack & SS_ONSTACK)
l->l_sigstk.ss_flags |= SS_ONSTACK;
else
l->l_sigstk.ss_flags &= ~SS_ONSTACK;
/* Restore signal mask */
native_sigset13_to_sigset(&scp->sc_mask, &mask);
(void) sigprocmask1(l, SIG_SETMASK, &mask, 0);
mutex_exit(p->p_lock);
return (EJUSTRETURN);
}
#if NFIRM_EVENTS > 0
/*
* Write out a series of 32-bit firm_events.
*/
static int
ev_out32(struct firm_event *e, int n, struct uio *uio)
{
struct firm_event32 e32;
int error = 0;
while (n-- && error == 0) {
e32.id = e->id;
e32.value = e->value;
e32.time.tv_sec = e->time.tv_sec;
e32.time.tv_usec = e->time.tv_usec;
error = uiomove((void *)&e32, sizeof(e32), uio);
e++;
}
return (error);
}
#endif