Linux-2.6.12-rc2v2.6.12-rc2

Initial git repository build. I'm not bothering with the full history,
even though we have it. We can create a separate "historical" git
archive of that later if we want to, and in the meantime it's about
3.2GB when imported into git - space that would just make the early
git days unnecessarily complicated, when we don't have a lot of good
infrastructure for it.

Let it rip!

1 files changed, 853 insertions, 0 deletions

diff --git a/arch/mips/kernel/irixsig.c b/arch/mips/kernel/irixsig.c
new file mode 100644
index 00000000000..3f956f809fa
--- /dev/null
+++ b/arch/mips/kernel/irixsig.c
@@ -0,0 +1,853 @@
+/*
+ * irixsig.c: WHEEE, IRIX signals!  YOW, am I compatible or what?!?!
+ *
+ * Copyright (C) 1996 David S. Miller (dm@engr.sgi.com)
+ * Copyright (C) 1997 - 2000 Ralf Baechle (ralf@gnu.org)
+ * Copyright (C) 2000 Silicon Graphics, Inc.
+ */
+#include <linux/kernel.h>
+#include <linux/sched.h>
+#include <linux/mm.h>
+#include <linux/errno.h>
+#include <linux/smp.h>
+#include <linux/smp_lock.h>
+#include <linux/time.h>
+#include <linux/ptrace.h>
+
+#include <asm/ptrace.h>
+#include <asm/uaccess.h>
+
+#undef DEBUG_SIG
+
+#define _S(nr) (1<<((nr)-1))
+
+#define _BLOCKABLE (~(_S(SIGKILL) | _S(SIGSTOP)))
+
+typedef struct {
+	unsigned long sig[4];
+} irix_sigset_t;
+
+struct sigctx_irix5 {
+	u32 rmask, cp0_status;
+	u64 pc;
+	u64 regs[32];
+	u64 fpregs[32];
+	u32 usedfp, fpcsr, fpeir, sstk_flags;
+	u64 hi, lo;
+	u64 cp0_cause, cp0_badvaddr, _unused0;
+	irix_sigset_t sigset;
+	u64 weird_fpu_thing;
+	u64 _unused1[31];
+};
+
+#ifdef DEBUG_SIG
+/* Debugging */
+static inline void dump_irix5_sigctx(struct sigctx_irix5 *c)
+{
+	int i;
+
+	printk("misc: rmask[%08lx] status[%08lx] pc[%08lx]\n",
+	       (unsigned long) c->rmask,
+	       (unsigned long) c->cp0_status,
+	       (unsigned long) c->pc);
+	printk("regs: ");
+	for(i = 0; i < 16; i++)
+		printk("[%d]<%08lx> ", i, (unsigned long) c->regs[i]);
+	printk("\nregs: ");
+	for(i = 16; i < 32; i++)
+		printk("[%d]<%08lx> ", i, (unsigned long) c->regs[i]);
+	printk("\nfpregs: ");
+	for(i = 0; i < 16; i++)
+		printk("[%d]<%08lx> ", i, (unsigned long) c->fpregs[i]);
+	printk("\nfpregs: ");
+	for(i = 16; i < 32; i++)
+		printk("[%d]<%08lx> ", i, (unsigned long) c->fpregs[i]);
+	printk("misc: usedfp[%d] fpcsr[%08lx] fpeir[%08lx] stk_flgs[%08lx]\n",
+	       (int) c->usedfp, (unsigned long) c->fpcsr,
+	       (unsigned long) c->fpeir, (unsigned long) c->sstk_flags);
+	printk("misc: hi[%08lx] lo[%08lx] cause[%08lx] badvaddr[%08lx]\n",
+	       (unsigned long) c->hi, (unsigned long) c->lo,
+	       (unsigned long) c->cp0_cause, (unsigned long) c->cp0_badvaddr);
+	printk("misc: sigset<0>[%08lx] sigset<1>[%08lx] sigset<2>[%08lx] "
+	       "sigset<3>[%08lx]\n", (unsigned long) c->sigset.sig[0],
+	       (unsigned long) c->sigset.sig[1],
+	       (unsigned long) c->sigset.sig[2],
+	       (unsigned long) c->sigset.sig[3]);
+}
+#endif
+
+static void setup_irix_frame(struct k_sigaction *ka, struct pt_regs *regs,
+			     int signr, sigset_t *oldmask)
+{
+	unsigned long sp;
+	struct sigctx_irix5 *ctx;
+	int i;
+
+	sp = regs->regs[29];
+	sp -= sizeof(struct sigctx_irix5);
+	sp &= ~(0xf);
+	ctx = (struct sigctx_irix5 *) sp;
+	if (!access_ok(VERIFY_WRITE, ctx, sizeof(*ctx)))
+		goto segv_and_exit;
+
+	__put_user(0, &ctx->weird_fpu_thing);
+	__put_user(~(0x00000001), &ctx->rmask);
+	__put_user(0, &ctx->regs[0]);
+	for(i = 1; i < 32; i++)
+		__put_user((u64) regs->regs[i], &ctx->regs[i]);
+
+	__put_user((u64) regs->hi, &ctx->hi);
+	__put_user((u64) regs->lo, &ctx->lo);
+	__put_user((u64) regs->cp0_epc, &ctx->pc);
+	__put_user(!!used_math(), &ctx->usedfp);
+	__put_user((u64) regs->cp0_cause, &ctx->cp0_cause);
+	__put_user((u64) regs->cp0_badvaddr, &ctx->cp0_badvaddr);
+
+	__put_user(0, &ctx->sstk_flags); /* XXX sigstack unimp... todo... */
+
+	__copy_to_user(&ctx->sigset, oldmask, sizeof(irix_sigset_t));
+
+#ifdef DEBUG_SIG
+	dump_irix5_sigctx(ctx);
+#endif
+
+	regs->regs[4] = (unsigned long) signr;
+	regs->regs[5] = 0; /* XXX sigcode XXX */
+	regs->regs[6] = regs->regs[29] = sp;
+	regs->regs[7] = (unsigned long) ka->sa.sa_handler;
+	regs->regs[25] = regs->cp0_epc = (unsigned long) ka->sa_restorer;
+
+	return;
+
+segv_and_exit:
+	force_sigsegv(signr, current);
+}
+
+static void inline
+setup_irix_rt_frame(struct k_sigaction * ka, struct pt_regs *regs,
+               int signr, sigset_t *oldmask, siginfo_t *info)
+{
+	printk("Aiee: setup_tr_frame wants to be written");
+	do_exit(SIGSEGV);
+}
+
+static inline void handle_signal(unsigned long sig, siginfo_t *info,
+	struct k_sigaction *ka, sigset_t *oldset, struct pt_regs * regs)
+{
+	switch(regs->regs[0]) {
+	case ERESTARTNOHAND:
+		regs->regs[2] = EINTR;
+		break;
+	case ERESTARTSYS:
+		if(!(ka->sa.sa_flags & SA_RESTART)) {
+			regs->regs[2] = EINTR;
+			break;
+		}
+	/* fallthrough */
+	case ERESTARTNOINTR:		/* Userland will reload $v0.  */
+		regs->cp0_epc -= 8;
+	}
+
+	regs->regs[0] = 0;		/* Don't deal with this again.  */
+
+	if (ka->sa.sa_flags & SA_SIGINFO)
+		setup_irix_rt_frame(ka, regs, sig, oldset, info);
+	else
+		setup_irix_frame(ka, regs, sig, oldset);
+
+	if (!(ka->sa.sa_flags & SA_NODEFER)) {
+		spin_lock_irq(&current->sighand->siglock);
+		sigorsets(&current->blocked,&current->blocked,&ka->sa.sa_mask);
+		sigaddset(&current->blocked,sig);
+		recalc_sigpending();
+		spin_unlock_irq(&current->sighand->siglock);
+	}
+}
+
+asmlinkage int do_irix_signal(sigset_t *oldset, struct pt_regs *regs)
+{
+	struct k_sigaction ka;
+	siginfo_t info;
+	int signr;
+
+	/*
+	 * We want the common case to go fast, which is why we may in certain
+	 * cases get here from kernel mode. Just return without doing anything
+	 * if so.
+	 */
+	if (!user_mode(regs))
+		return 1;
+
+	if (try_to_freeze(0))
+		goto no_signal;
+
+	if (!oldset)
+		oldset = &current->blocked;
+
+	signr = get_signal_to_deliver(&info, &ka, regs, NULL);
+	if (signr > 0) {
+		handle_signal(signr, &info, &ka, oldset, regs);
+		return 1;
+	}
+
+no_signal:
+	/*
+	 * Who's code doesn't conform to the restartable syscall convention
+	 * dies here!!!  The li instruction, a single machine instruction,
+	 * must directly be followed by the syscall instruction.
+	 */
+	if (regs->regs[0]) {
+		if (regs->regs[2] == ERESTARTNOHAND ||
+		    regs->regs[2] == ERESTARTSYS ||
+		    regs->regs[2] == ERESTARTNOINTR) {
+			regs->cp0_epc -= 8;
+		}
+	}
+	return 0;
+}
+
+asmlinkage void
+irix_sigreturn(struct pt_regs *regs)
+{
+	struct sigctx_irix5 *context, *magic;
+	unsigned long umask, mask;
+	u64 *fregs;
+	int sig, i, base = 0;
+	sigset_t blocked;
+
+	/* Always make any pending restarted system calls return -EINTR */
+	current_thread_info()->restart_block.fn = do_no_restart_syscall;
+
+	if (regs->regs[2] == 1000)
+		base = 1;
+
+	context = (struct sigctx_irix5 *) regs->regs[base + 4];
+	magic = (struct sigctx_irix5 *) regs->regs[base + 5];
+	sig = (int) regs->regs[base + 6];
+#ifdef DEBUG_SIG
+	printk("[%s:%d] IRIX sigreturn(scp[%p],ucp[%p],sig[%d])\n",
+	       current->comm, current->pid, context, magic, sig);
+#endif
+	if (!context)
+		context = magic;
+	if (!access_ok(VERIFY_READ, context, sizeof(struct sigctx_irix5)))
+		goto badframe;
+
+#ifdef DEBUG_SIG
+	dump_irix5_sigctx(context);
+#endif
+
+	__get_user(regs->cp0_epc, &context->pc);
+	umask = context->rmask; mask = 2;
+	for (i = 1; i < 32; i++, mask <<= 1) {
+		if(umask & mask)
+			__get_user(regs->regs[i], &context->regs[i]);
+	}
+	__get_user(regs->hi, &context->hi);
+	__get_user(regs->lo, &context->lo);
+
+	if ((umask & 1) && context->usedfp) {
+		fregs = (u64 *) &current->thread.fpu;
+		for(i = 0; i < 32; i++)
+			fregs[i] = (u64) context->fpregs[i];
+		__get_user(current->thread.fpu.hard.fcr31, &context->fpcsr);
+	}
+
+	/* XXX do sigstack crapola here... XXX */
+
+	if (__copy_from_user(&blocked, &context->sigset, sizeof(blocked)))
+		goto badframe;
+
+	sigdelsetmask(&blocked, ~_BLOCKABLE);
+	spin_lock_irq(&current->sighand->siglock);
+	current->blocked = blocked;
+	recalc_sigpending();
+	spin_unlock_irq(&current->sighand->siglock);
+
+	/*
+	 * Don't let your children do this ...
+	 */
+	if (current_thread_info()->flags & TIF_SYSCALL_TRACE)
+		do_syscall_trace(regs, 1);
+	__asm__ __volatile__(
+		"move\t$29,%0\n\t"
+		"j\tsyscall_exit"
+		:/* no outputs */
+		:"r" (&regs));
+		/* Unreached */
+
+badframe:
+	force_sig(SIGSEGV, current);
+}
+
+struct sigact_irix5 {
+	int flags;
+	void (*handler)(int);
+	u32 sigset[4];
+	int _unused0[2];
+};
+
+#ifdef DEBUG_SIG
+static inline void dump_sigact_irix5(struct sigact_irix5 *p)
+{
+	printk("<f[%d] hndlr[%08lx] msk[%08lx]>", p->flags,
+	       (unsigned long) p->handler,
+	       (unsigned long) p->sigset[0]);
+}
+#endif
+
+asmlinkage int
+irix_sigaction(int sig, const struct sigaction *act,
+	      struct sigaction *oact, void *trampoline)
+{
+	struct k_sigaction new_ka, old_ka;
+	int ret;
+
+#ifdef DEBUG_SIG
+	printk(" (%d,%s,%s,%08lx) ", sig, (!new ? "0" : "NEW"),
+	       (!old ? "0" : "OLD"), trampoline);
+	if(new) {
+		dump_sigact_irix5(new); printk(" ");
+	}
+#endif
+	if (act) {
+		sigset_t mask;
+		if (!access_ok(VERIFY_READ, act, sizeof(*act)) ||
+		    __get_user(new_ka.sa.sa_handler, &act->sa_handler) ||
+		    __get_user(new_ka.sa.sa_flags, &act->sa_flags))
+			return -EFAULT;
+
+		__copy_from_user(&mask, &act->sa_mask, sizeof(sigset_t));
+
+		/*
+		 * Hmmm... methinks IRIX libc always passes a valid trampoline
+		 * value for all invocations of sigaction.  Will have to
+		 * investigate.  POSIX POSIX, die die die...
+		 */
+		new_ka.sa_restorer = trampoline;
+	}
+
+/* XXX Implement SIG_SETMASK32 for IRIX compatibility */
+	ret = do_sigaction(sig, act ? &new_ka : NULL, oact ? &old_ka : NULL);
+
+	if (!ret && oact) {
+		if (!access_ok(VERIFY_WRITE, oact, sizeof(*oact)) ||
+		    __put_user(old_ka.sa.sa_handler, &oact->sa_handler) ||
+		    __put_user(old_ka.sa.sa_flags, &oact->sa_flags))
+			return -EFAULT;
+		__copy_to_user(&old_ka.sa.sa_mask, &oact->sa_mask,
+		               sizeof(sigset_t));
+	}
+
+	return ret;
+}
+
+asmlinkage int irix_sigpending(irix_sigset_t *set)
+{
+	return do_sigpending(set, sizeof(*set));
+}
+
+asmlinkage int irix_sigprocmask(int how, irix_sigset_t *new, irix_sigset_t *old)
+{
+	sigset_t oldbits, newbits;
+
+	if (new) {
+		if (!access_ok(VERIFY_READ, new, sizeof(*new)))
+			return -EFAULT;
+		__copy_from_user(&newbits, new, sizeof(unsigned long)*4);
+		sigdelsetmask(&newbits, ~_BLOCKABLE);
+
+		spin_lock_irq(&current->sighand->siglock);
+		oldbits = current->blocked;
+
+		switch(how) {
+		case 1:
+			sigorsets(&newbits, &oldbits, &newbits);
+			break;
+
+		case 2:
+			sigandsets(&newbits, &oldbits, &newbits);
+			break;
+
+		case 3:
+			break;
+
+		case 256:
+			siginitset(&newbits, newbits.sig[0]);
+			break;
+
+		default:
+			return -EINVAL;
+		}
+		recalc_sigpending();
+		spin_unlock_irq(&current->sighand->siglock);
+	}
+	if(old) {
+		if (!access_ok(VERIFY_WRITE, old, sizeof(*old)))
+			return -EFAULT;
+		__copy_to_user(old, &current->blocked, sizeof(unsigned long)*4);
+	}
+
+	return 0;
+}
+
+asmlinkage int irix_sigsuspend(struct pt_regs *regs)
+{
+	sigset_t *uset, saveset, newset;
+
+	uset = (sigset_t *) regs->regs[4];
+	if (copy_from_user(&newset, uset, sizeof(sigset_t)))
+		return -EFAULT;
+	sigdelsetmask(&newset, ~_BLOCKABLE);
+
+	spin_lock_irq(&current->sighand->siglock);
+	saveset = current->blocked;
+	current->blocked = newset;
+	recalc_sigpending();
+	spin_unlock_irq(&current->sighand->siglock);
+
+	regs->regs[2] = -EINTR;
+	while (1) {
+		current->state = TASK_INTERRUPTIBLE;
+		schedule();
+		if (do_irix_signal(&saveset, regs))
+			return -EINTR;
+	}
+}
+
+/* hate hate hate... */
+struct irix5_siginfo {
+	int sig, code, error;
+	union {
+		char unused[128 - (3 * 4)]; /* Safety net. */
+		struct {
+			int pid;
+			union {
+				int uid;
+				struct {
+					int utime, status, stime;
+				} child;
+			} procdata;
+		} procinfo;
+
+		unsigned long fault_addr;
+
+		struct {
+			int fd;
+			long band;
+		} fileinfo;
+
+		unsigned long sigval;
+	} stuff;
+};
+
+static inline unsigned long timespectojiffies(struct timespec *value)
+{
+	unsigned long sec = (unsigned) value->tv_sec;
+	long nsec = value->tv_nsec;
+
+	if (sec > (LONG_MAX / HZ))
+		return LONG_MAX;
+	nsec += 1000000000L / HZ - 1;
+	nsec /= 1000000000L / HZ;
+	return HZ * sec + nsec;
+}
+
+asmlinkage int irix_sigpoll_sys(unsigned long *set, struct irix5_siginfo *info,
+				struct timespec *tp)
+{
+	long expire = MAX_SCHEDULE_TIMEOUT;
+	sigset_t kset;
+	int i, sig, error, timeo = 0;
+
+#ifdef DEBUG_SIG
+	printk("[%s:%d] irix_sigpoll_sys(%p,%p,%p)\n",
+	       current->comm, current->pid, set, info, tp);
+#endif
+
+	/* Must always specify the signal set. */
+	if (!set)
+		return -EINVAL;
+
+	if (!access_ok(VERIFY_READ, set, sizeof(kset))) {
+		error = -EFAULT;
+		goto out;
+	}
+
+	__copy_from_user(&kset, set, sizeof(set));
+	if (error)
+		goto out;
+
+	if (info && clear_user(info, sizeof(*info))) {
+		error = -EFAULT;
+		goto out;
+	}
+
+	if (tp) {
+		if (!access_ok(VERIFY_READ, tp, sizeof(*tp)))
+			return -EFAULT;
+		if (!tp->tv_sec && !tp->tv_nsec) {
+			error = -EINVAL;
+			goto out;
+		}
+		expire = timespectojiffies(tp)+(tp->tv_sec||tp->tv_nsec);
+	}
+
+	while(1) {
+		long tmp = 0;
+
+		current->state = TASK_INTERRUPTIBLE;
+		expire = schedule_timeout(expire);
+
+		for (i=0; i<=4; i++)
+			tmp |= (current->pending.signal.sig[i] & kset.sig[i]);
+
+		if (tmp)
+			break;
+		if (!expire) {
+			timeo = 1;
+			break;
+		}
+		if (signal_pending(current))
+			return -EINTR;
+	}
+	if (timeo)
+		return -EAGAIN;
+
+	for(sig = 1; i <= 65 /* IRIX_NSIG */; sig++) {
+		if (sigismember (&kset, sig))
+			continue;
+		if (sigismember (&current->pending.signal, sig)) {
+			/* XXX need more than this... */
+			if (info)
+				info->sig = sig;
+			error = 0;
+			goto out;
+		}
+	}
+
+	/* Should not get here, but do something sane if we do. */
+	error = -EINTR;
+
+out:
+	return error;
+}
+
+/* This is here because of irix5_siginfo definition. */
+#define IRIX_P_PID    0
+#define IRIX_P_PGID   2
+#define IRIX_P_ALL    7
+
+extern int getrusage(struct task_struct *, int, struct rusage __user *);
+
+#define W_EXITED     1
+#define W_TRAPPED    2
+#define W_STOPPED    4
+#define W_CONT       8
+#define W_NOHANG    64
+
+#define W_MASK      (W_EXITED | W_TRAPPED | W_STOPPED | W_CONT | W_NOHANG)
+
+asmlinkage int irix_waitsys(int type, int pid, struct irix5_siginfo *info,
+			    int options, struct rusage *ru)
+{
+	int flag, retval;
+	DECLARE_WAITQUEUE(wait, current);
+	struct task_struct *tsk;
+	struct task_struct *p;
+	struct list_head *_p;
+
+	if (!info) {
+		retval = -EINVAL;
+		goto out;
+	}
+	if (!access_ok(VERIFY_WRITE, info, sizeof(*info))) {
+		retval = -EFAULT;
+		goto out;
+	}
+	if (ru) {
+		if (!access_ok(VERIFY_WRITE, ru, sizeof(*ru))) {
+			retval = -EFAULT;
+			goto out;
+		}
+	}
+	if (options & ~(W_MASK)) {
+		retval = -EINVAL;
+		goto out;
+	}
+	if (type != IRIX_P_PID && type != IRIX_P_PGID && type != IRIX_P_ALL) {
+		retval = -EINVAL;
+		goto out;
+	}
+	add_wait_queue(&current->signal->wait_chldexit, &wait);
+repeat:
+	flag = 0;
+	current->state = TASK_INTERRUPTIBLE;
+	read_lock(&tasklist_lock);
+	tsk = current;
+	list_for_each(_p,&tsk->children) {
+		p = list_entry(_p,struct task_struct,sibling);
+		if ((type == IRIX_P_PID) && p->pid != pid)
+			continue;
+		if ((type == IRIX_P_PGID) && process_group(p) != pid)
+			continue;
+		if ((p->exit_signal != SIGCHLD))
+			continue;
+		flag = 1;
+		switch (p->state) {
+		case TASK_STOPPED:
+			if (!p->exit_code)
+				continue;
+			if (!(options & (W_TRAPPED|W_STOPPED)) &&
+			    !(p->ptrace & PT_PTRACED))
+				continue;
+			read_unlock(&tasklist_lock);
+
+			/* move to end of parent's list to avoid starvation */
+			write_lock_irq(&tasklist_lock);
+			remove_parent(p);
+			add_parent(p, p->parent);
+			write_unlock_irq(&tasklist_lock);
+			retval = ru ? getrusage(p, RUSAGE_BOTH, ru) : 0;
+			if (!retval && ru) {
+				retval |= __put_user(SIGCHLD, &info->sig);
+				retval |= __put_user(0, &info->code);
+				retval |= __put_user(p->pid, &info->stuff.procinfo.pid);
+				retval |= __put_user((p->exit_code >> 8) & 0xff,
+				           &info->stuff.procinfo.procdata.child.status);
+				retval |= __put_user(p->utime, &info->stuff.procinfo.procdata.child.utime);
+				retval |= __put_user(p->stime, &info->stuff.procinfo.procdata.child.stime);
+			}
+			if (!retval) {
+				p->exit_code = 0;
+			}
+			goto end_waitsys;
+
+		case EXIT_ZOMBIE:
+			current->signal->cutime += p->utime + p->signal->cutime;
+			current->signal->cstime += p->stime + p->signal->cstime;
+			if (ru != NULL)
+				getrusage(p, RUSAGE_BOTH, ru);
+			__put_user(SIGCHLD, &info->sig);
+			__put_user(1, &info->code);      /* CLD_EXITED */
+			__put_user(p->pid, &info->stuff.procinfo.pid);
+			__put_user((p->exit_code >> 8) & 0xff,
+			           &info->stuff.procinfo.procdata.child.status);
+			__put_user(p->utime,
+			           &info->stuff.procinfo.procdata.child.utime);
+			__put_user(p->stime,
+			           &info->stuff.procinfo.procdata.child.stime);
+			retval = 0;
+			if (p->real_parent != p->parent) {
+				write_lock_irq(&tasklist_lock);
+				remove_parent(p);
+				p->parent = p->real_parent;
+				add_parent(p, p->parent);
+				do_notify_parent(p, SIGCHLD);
+				write_unlock_irq(&tasklist_lock);
+			} else
+				release_task(p);
+			goto end_waitsys;
+		default:
+			continue;
+		}
+		tsk = next_thread(tsk);
+	}
+	read_unlock(&tasklist_lock);
+	if (flag) {
+		retval = 0;
+		if (options & W_NOHANG)
+			goto end_waitsys;
+		retval = -ERESTARTSYS;
+		if (signal_pending(current))
+			goto end_waitsys;
+		current->state = TASK_INTERRUPTIBLE;
+		schedule();
+		goto repeat;
+	}
+	retval = -ECHILD;
+end_waitsys:
+	current->state = TASK_RUNNING;
+	remove_wait_queue(&current->signal->wait_chldexit, &wait);
+
+out:
+	return retval;
+}
+
+struct irix5_context {
+	u32 flags;
+	u32 link;
+	u32 sigmask[4];
+	struct { u32 sp, size, flags; } stack;
+	int regs[36];
+	u32 fpregs[32];
+	u32 fpcsr;
+	u32 _unused0;
+	u32 _unused1[47];
+	u32 weird_graphics_thing;
+};
+
+asmlinkage int irix_getcontext(struct pt_regs *regs)
+{
+	int i, base = 0;
+	struct irix5_context *ctx;
+	unsigned long flags;
+
+	if (regs->regs[2] == 1000)
+		base = 1;
+	ctx = (struct irix5_context *) regs->regs[base + 4];
+
+#ifdef DEBUG_SIG
+	printk("[%s:%d] irix_getcontext(%p)\n",
+	       current->comm, current->pid, ctx);
+#endif
+
+	if (!access_ok(VERIFY_WRITE, ctx, sizeof(*ctx)))
+		return -EFAULT;
+
+	__put_user(current->thread.irix_oldctx, &ctx->link);
+
+	__copy_to_user(&ctx->sigmask, &current->blocked, sizeof(irix_sigset_t));
+
+	/* XXX Do sigstack stuff someday... */
+	__put_user(0, &ctx->stack.sp);
+	__put_user(0, &ctx->stack.size);
+	__put_user(0, &ctx->stack.flags);
+
+	__put_user(0, &ctx->weird_graphics_thing);
+	__put_user(0, &ctx->regs[0]);
+	for (i = 1; i < 32; i++)
+		__put_user(regs->regs[i], &ctx->regs[i]);
+	__put_user(regs->lo, &ctx->regs[32]);
+	__put_user(regs->hi, &ctx->regs[33]);
+	__put_user(regs->cp0_cause, &ctx->regs[34]);
+	__put_user(regs->cp0_epc, &ctx->regs[35]);
+
+	flags = 0x0f;
+	if (!used_math()) {
+		flags &= ~(0x08);
+	} else {
+		/* XXX wheee... */
+		printk("Wheee, no code for saving IRIX FPU context yet.\n");
+	}
+	__put_user(flags, &ctx->flags);
+
+	return 0;
+}
+
+asmlinkage unsigned long irix_setcontext(struct pt_regs *regs)
+{
+	int error, base = 0;
+	struct irix5_context *ctx;
+
+	if(regs->regs[2] == 1000)
+		base = 1;
+	ctx = (struct irix5_context *) regs->regs[base + 4];
+
+#ifdef DEBUG_SIG
+	printk("[%s:%d] irix_setcontext(%p)\n",
+	       current->comm, current->pid, ctx);
+#endif
+
+	if (!access_ok(VERIFY_READ, ctx, sizeof(*ctx))) {
+		error = -EFAULT;
+		goto out;
+	}
+
+	if (ctx->flags & 0x02) {
+		/* XXX sigstack garbage, todo... */
+		printk("Wheee, cannot do sigstack stuff in setcontext\n");
+	}
+
+	if (ctx->flags & 0x04) {
+		int i;
+
+		/* XXX extra control block stuff... todo... */
+		for(i = 1; i < 32; i++)
+			regs->regs[i] = ctx->regs[i];
+		regs->lo = ctx->regs[32];
+		regs->hi = ctx->regs[33];
+		regs->cp0_epc = ctx->regs[35];
+	}
+
+	if (ctx->flags & 0x08) {
+		/* XXX fpu context, blah... */
+		printk("Wheee, cannot restore FPU context yet...\n");
+	}
+	current->thread.irix_oldctx = ctx->link;
+	error = regs->regs[2];
+
+out:
+	return error;
+}
+
+struct irix_sigstack { unsigned long sp; int status; };
+
+asmlinkage int irix_sigstack(struct irix_sigstack *new, struct irix_sigstack *old)
+{
+	int error = -EFAULT;
+
+#ifdef DEBUG_SIG
+	printk("[%s:%d] irix_sigstack(%p,%p)\n",
+	       current->comm, current->pid, new, old);
+#endif
+	if(new) {
+		if (!access_ok(VERIFY_READ, new, sizeof(*new)))
+			goto out;
+	}
+
+	if(old) {
+		if (!access_ok(VERIFY_WRITE, old, sizeof(*old)))
+			goto out;
+	}
+	error = 0;
+
+out:
+	return error;
+}
+
+struct irix_sigaltstack { unsigned long sp; int size; int status; };
+
+asmlinkage int irix_sigaltstack(struct irix_sigaltstack *new,
+				struct irix_sigaltstack *old)
+{
+	int error = -EFAULT;
+
+#ifdef DEBUG_SIG
+	printk("[%s:%d] irix_sigaltstack(%p,%p)\n",
+	       current->comm, current->pid, new, old);
+#endif
+	if (new) {
+		if (!access_ok(VERIFY_READ, new, sizeof(*new)))
+			goto out;
+	}
+
+	if (old) {
+		if (!access_ok(VERIFY_WRITE, old, sizeof(*old)))
+			goto out;
+	}
+	error = 0;
+
+out:
+	error = 0;
+
+	return error;
+}
+
+struct irix_procset {
+	int cmd, ltype, lid, rtype, rid;
+};
+
+asmlinkage int irix_sigsendset(struct irix_procset *pset, int sig)
+{
+	if (!access_ok(VERIFY_READ, pset, sizeof(*pset)))
+		return -EFAULT;
+
+#ifdef DEBUG_SIG
+	printk("[%s:%d] irix_sigsendset([%d,%d,%d,%d,%d],%d)\n",
+	       current->comm, current->pid,
+	       pset->cmd, pset->ltype, pset->lid, pset->rtype, pset->rid,
+	       sig);
+#endif
+	return -EINVAL;
+}