diff options
Diffstat (limited to 'arch/mips/kernel/irixsig.c')
| -rw-r--r-- | arch/mips/kernel/irixsig.c | 888 |
1 files changed, 0 insertions, 888 deletions
diff --git a/arch/mips/kernel/irixsig.c b/arch/mips/kernel/irixsig.c deleted file mode 100644 index 0215c80..0000000 --- a/arch/mips/kernel/irixsig.c +++ /dev/null @@ -1,888 +0,0 @@ -/* - * 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/time.h> -#include <linux/ptrace.h> -#include <linux/resource.h> - -#include <asm/ptrace.h> -#include <asm/uaccess.h> -#include <asm/unistd.h> - -#undef DEBUG_SIG - -#define _S(nr) (1<<((nr)-1)) - -#define _BLOCKABLE (~(_S(SIGKILL) | _S(SIGSTOP))) - -#define _IRIX_NSIG 128 -#define _IRIX_NSIG_BPW BITS_PER_LONG -#define _IRIX_NSIG_WORDS (_IRIX_NSIG / _IRIX_NSIG_BPW) - -typedef struct { - unsigned long sig[_IRIX_NSIG_WORDS]; -} 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 int setup_irix_frame(struct k_sigaction *ka, struct pt_regs *regs, - int signr, sigset_t *oldmask) -{ - struct sigctx_irix5 __user *ctx; - unsigned long sp; - int error, i; - - sp = regs->regs[29]; - sp -= sizeof(struct sigctx_irix5); - sp &= ~(0xf); - ctx = (struct sigctx_irix5 __user *) sp; - if (!access_ok(VERIFY_WRITE, ctx, sizeof(*ctx))) - goto segv_and_exit; - - error = __put_user(0, &ctx->weird_fpu_thing); - error |= __put_user(~(0x00000001), &ctx->rmask); - error |= __put_user(0, &ctx->regs[0]); - for(i = 1; i < 32; i++) - error |= __put_user((u64) regs->regs[i], &ctx->regs[i]); - - error |= __put_user((u64) regs->hi, &ctx->hi); - error |= __put_user((u64) regs->lo, &ctx->lo); - error |= __put_user((u64) regs->cp0_epc, &ctx->pc); - error |= __put_user(!!used_math(), &ctx->usedfp); - error |= __put_user((u64) regs->cp0_cause, &ctx->cp0_cause); - error |= __put_user((u64) regs->cp0_badvaddr, &ctx->cp0_badvaddr); - - error |= __put_user(0, &ctx->sstk_flags); /* XXX sigstack unimp... todo... */ - - error |= __copy_to_user(&ctx->sigset, oldmask, sizeof(irix_sigset_t)) ? -EFAULT : 0; - - if (error) - goto segv_and_exit; - -#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 1; - -segv_and_exit: - force_sigsegv(signr, current); - return 0; -} - -static int 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 int handle_signal(unsigned long sig, siginfo_t *info, - struct k_sigaction *ka, sigset_t *oldset, struct pt_regs * regs) -{ - int ret; - - 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) - ret = setup_irix_rt_frame(ka, regs, sig, oldset, info); - else - ret = setup_irix_frame(ka, regs, sig, oldset); - - spin_lock_irq(¤t->sighand->siglock); - sigorsets(¤t->blocked, ¤t->blocked, &ka->sa.sa_mask); - if (!(ka->sa.sa_flags & SA_NODEFER)) - sigaddset(¤t->blocked, sig); - recalc_sigpending(); - spin_unlock_irq(¤t->sighand->siglock); - - return ret; -} - -void do_irix_signal(struct pt_regs *regs) -{ - struct k_sigaction ka; - siginfo_t info; - int signr; - sigset_t *oldset; - - /* - * 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; - - if (test_thread_flag(TIF_RESTORE_SIGMASK)) - oldset = ¤t->saved_sigmask; - else - oldset = ¤t->blocked; - - signr = get_signal_to_deliver(&info, &ka, regs, NULL); - if (signr > 0) { - /* Whee! Actually deliver the signal. */ - if (handle_signal(signr, &info, &ka, oldset, regs) == 0) { - /* a signal was successfully delivered; the saved - * sigmask will have been stored in the signal frame, - * and will be restored by sigreturn, so we can simply - * clear the TIF_RESTORE_SIGMASK flag */ - if (test_thread_flag(TIF_RESTORE_SIGMASK)) - clear_thread_flag(TIF_RESTORE_SIGMASK); - } - - return; - } - - /* - * 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; - } - if (regs->regs[2] == ERESTART_RESTARTBLOCK) { - regs->regs[2] = __NR_restart_syscall; - regs->regs[7] = regs->regs[26]; - regs->cp0_epc -= 4; - } - regs->regs[0] = 0; /* Don't deal with this again. */ - } - - /* - * If there's no signal to deliver, we just put the saved sigmask - * back - */ - if (test_thread_flag(TIF_RESTORE_SIGMASK)) { - clear_thread_flag(TIF_RESTORE_SIGMASK); - sigprocmask(SIG_SETMASK, ¤t->saved_sigmask, NULL); - } -} - -asmlinkage void -irix_sigreturn(struct pt_regs *regs) -{ - struct sigctx_irix5 __user *context, *magic; - unsigned long umask, mask; - u64 *fregs; - u32 usedfp; - int error, 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 __user *) regs->regs[base + 4]; - magic = (struct sigctx_irix5 __user *) 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 - - error = __get_user(regs->cp0_epc, &context->pc); - error |= __get_user(umask, &context->rmask); - - mask = 2; - for (i = 1; i < 32; i++, mask <<= 1) { - if (umask & mask) - error |= __get_user(regs->regs[i], &context->regs[i]); - } - error |= __get_user(regs->hi, &context->hi); - error |= __get_user(regs->lo, &context->lo); - - error |= __get_user(usedfp, &context->usedfp); - if ((umask & 1) && usedfp) { - fregs = (u64 *) ¤t->thread.fpu; - - for(i = 0; i < 32; i++) - error |= __get_user(fregs[i], &context->fpregs[i]); - error |= __get_user(current->thread.fpu.fcr31, &context->fpcsr); - } - - /* XXX do sigstack crapola here... XXX */ - - error |= __copy_from_user(&blocked, &context->sigset, sizeof(blocked)) ? -EFAULT : 0; - - if (error) - goto badframe; - - sigdelsetmask(&blocked, ~_BLOCKABLE); - spin_lock_irq(¤t->sighand->siglock); - current->blocked = blocked; - recalc_sigpending(); - spin_unlock_irq(¤t->sighand->siglock); - - /* - * Don't let your children do this ... - */ - __asm__ __volatile__( - "move\t$29,%0\n\t" - "j\tsyscall_exit" - :/* no outputs */ - :"r" (®s)); - /* Unreached */ - -badframe: - force_sig(SIGSEGV, current); -} - -struct sigact_irix5 { - int flags; - void (*handler)(int); - u32 sigset[4]; - int _unused0[2]; -}; - -#define SIG_SETMASK32 256 /* Goodie from SGI for BSD compatibility: - set only the low 32 bit of the sigset. */ - -#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 __user *act, - struct sigaction __user *oact, void __user *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; - int err; - - if (!access_ok(VERIFY_READ, act, sizeof(*act))) - return -EFAULT; - err = __get_user(new_ka.sa.sa_handler, &act->sa_handler); - err |= __get_user(new_ka.sa.sa_flags, &act->sa_flags); - - err |= __copy_from_user(&mask, &act->sa_mask, sizeof(sigset_t)) ? -EFAULT : 0; - if (err) - return err; - - /* - * 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) { - int err; - - if (!access_ok(VERIFY_WRITE, oact, sizeof(*oact))) - return -EFAULT; - - err = __put_user(old_ka.sa.sa_handler, &oact->sa_handler); - err |= __put_user(old_ka.sa.sa_flags, &oact->sa_flags); - err |= __copy_to_user(&oact->sa_mask, &old_ka.sa.sa_mask, - sizeof(sigset_t)) ? -EFAULT : 0; - if (err) - return -EFAULT; - } - - return ret; -} - -asmlinkage int irix_sigpending(irix_sigset_t __user *set) -{ - return do_sigpending(set, sizeof(*set)); -} - -asmlinkage int irix_sigprocmask(int how, irix_sigset_t __user *new, - irix_sigset_t __user *old) -{ - sigset_t oldbits, newbits; - - if (new) { - if (!access_ok(VERIFY_READ, new, sizeof(*new))) - return -EFAULT; - if (__copy_from_user(&newbits, new, sizeof(unsigned long)*4)) - return -EFAULT; - sigdelsetmask(&newbits, ~_BLOCKABLE); - - spin_lock_irq(¤t->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: - spin_unlock_irq(¤t->sighand->siglock); - return -EINVAL; - } - recalc_sigpending(); - spin_unlock_irq(¤t->sighand->siglock); - } - if (old) - return copy_to_user(old, ¤t->blocked, - sizeof(unsigned long)*4) ? -EFAULT : 0; - - return 0; -} - -asmlinkage int irix_sigsuspend(struct pt_regs *regs) -{ - sigset_t newset; - sigset_t __user *uset; - - uset = (sigset_t __user *) regs->regs[4]; - if (copy_from_user(&newset, uset, sizeof(sigset_t))) - return -EFAULT; - sigdelsetmask(&newset, ~_BLOCKABLE); - - spin_lock_irq(¤t->sighand->siglock); - current->saved_sigmask = current->blocked; - current->blocked = newset; - recalc_sigpending(); - spin_unlock_irq(¤t->sighand->siglock); - - current->state = TASK_INTERRUPTIBLE; - schedule(); - set_thread_flag(TIF_RESTORE_SIGMASK); - return -ERESTARTNOHAND; -} - -/* 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; -}; - -asmlinkage int irix_sigpoll_sys(unsigned long __user *set, - struct irix5_siginfo __user *info, struct timespec __user *tp) -{ - long expire = MAX_SCHEDULE_TIMEOUT; - sigset_t kset; - int i, sig, error, timeo = 0; - struct timespec ktp; - -#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 (copy_from_user(&kset, set, sizeof(set))) - return -EFAULT; - - if (info && clear_user(info, sizeof(*info))) { - error = -EFAULT; - goto out; - } - - if (tp) { - if (copy_from_user(&ktp, tp, sizeof(*tp))) - return -EFAULT; - - if (!ktp.tv_sec && !ktp.tv_nsec) - return -EINVAL; - - expire = timespec_to_jiffies(&ktp) + - (ktp.tv_sec || ktp.tv_nsec); - } - - while(1) { - long tmp = 0; - - expire = schedule_timeout_interruptible(expire); - - for (i=0; i < _IRIX_NSIG_WORDS; 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 (¤t->pending.signal, sig)) { - /* XXX need more than this... */ - if (info) - return copy_to_user(&info->sig, &sig, sizeof(sig)); - return 0; - } - } - - /* 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 - -#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 upid, - struct irix5_siginfo __user *info, int options, - struct rusage __user *ru) -{ - struct pid *pid = NULL; - int flag, retval; - DECLARE_WAITQUEUE(wait, current); - struct task_struct *tsk; - struct task_struct *p; - struct list_head *_p; - - if (!info) - return -EINVAL; - - if (!access_ok(VERIFY_WRITE, info, sizeof(*info))) - return -EFAULT; - - if (ru) - if (!access_ok(VERIFY_WRITE, ru, sizeof(*ru))) - return -EFAULT; - - if (options & ~W_MASK) - return -EINVAL; - - if (type != IRIX_P_PID && type != IRIX_P_PGID && type != IRIX_P_ALL) - return -EINVAL; - - if (type != IRIX_P_ALL) - pid = find_get_pid(upid); - add_wait_queue(¤t->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) && task_pid(p) != pid) - continue; - if ((type == IRIX_P_PGID) && task_pgrp(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); - write_unlock_irq(&tasklist_lock); - retval = ru ? getrusage(p, RUSAGE_BOTH, ru) : 0; - if (retval) - goto end_waitsys; - - retval = __put_user(SIGCHLD, &info->sig); - retval |= __put_user(0, &info->code); - retval |= __put_user(task_pid_vnr(p), &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) - goto end_waitsys; - - 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); - retval = __put_user(SIGCHLD, &info->sig); - retval |= __put_user(1, &info->code); /* CLD_EXITED */ - retval |= __put_user(task_pid_vnr(p), &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) - goto end_waitsys; - - if (p->real_parent != p->parent) { - write_lock_irq(&tasklist_lock); - remove_parent(p); - p->parent = p->real_parent; - add_parent(p); - 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(¤t->signal->wait_chldexit, &wait); - put_pid(pid); - - 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 error, i, base = 0; - struct irix5_context __user *ctx; - unsigned long flags; - - if (regs->regs[2] == 1000) - base = 1; - ctx = (struct irix5_context __user *) 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; - - error = __put_user(current->thread.irix_oldctx, &ctx->link); - - error |= __copy_to_user(&ctx->sigmask, ¤t->blocked, sizeof(irix_sigset_t)) ? -EFAULT : 0; - - /* XXX Do sigstack stuff someday... */ - error |= __put_user(0, &ctx->stack.sp); - error |= __put_user(0, &ctx->stack.size); - error |= __put_user(0, &ctx->stack.flags); - - error |= __put_user(0, &ctx->weird_graphics_thing); - error |= __put_user(0, &ctx->regs[0]); - for (i = 1; i < 32; i++) - error |= __put_user(regs->regs[i], &ctx->regs[i]); - error |= __put_user(regs->lo, &ctx->regs[32]); - error |= __put_user(regs->hi, &ctx->regs[33]); - error |= __put_user(regs->cp0_cause, &ctx->regs[34]); - error |= __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"); - } - error |= __put_user(flags, &ctx->flags); - - return error; -} - -asmlinkage void irix_setcontext(struct pt_regs *regs) -{ - struct irix5_context __user *ctx; - int err, base = 0; - u32 flags; - - if (regs->regs[2] == 1000) - base = 1; - ctx = (struct irix5_context __user *) 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))) - goto segv_and_exit; - - err = __get_user(flags, &ctx->flags); - if (flags & 0x02) { - /* XXX sigstack garbage, todo... */ - printk("Wheee, cannot do sigstack stuff in setcontext\n"); - } - - if (flags & 0x04) { - int i; - - /* XXX extra control block stuff... todo... */ - for (i = 1; i < 32; i++) - err |= __get_user(regs->regs[i], &ctx->regs[i]); - err |= __get_user(regs->lo, &ctx->regs[32]); - err |= __get_user(regs->hi, &ctx->regs[33]); - err |= __get_user(regs->cp0_epc, &ctx->regs[35]); - } - - if (flags & 0x08) - /* XXX fpu context, blah... */ - printk(KERN_ERR "Wheee, cannot restore FPU context yet...\n"); - - err |= __get_user(current->thread.irix_oldctx, &ctx->link); - if (err) - goto segv_and_exit; - - /* - * Don't let your children do this ... - */ - __asm__ __volatile__( - "move\t$29,%0\n\t" - "j\tsyscall_exit" - :/* no outputs */ - :"r" (®s)); - /* Unreached */ - -segv_and_exit: - force_sigsegv(SIGSEGV, current); -} - -struct irix_sigstack { - unsigned long sp; - int status; -}; - -asmlinkage int irix_sigstack(struct irix_sigstack __user *new, - struct irix_sigstack __user *old) -{ -#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))) - return -EFAULT; - } - - if (old) { - if (!access_ok(VERIFY_WRITE, old, sizeof(*old))) - return -EFAULT; - } - - return 0; -} - -struct irix_sigaltstack { unsigned long sp; int size; int status; }; - -asmlinkage int irix_sigaltstack(struct irix_sigaltstack __user *new, - struct irix_sigaltstack __user *old) -{ -#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))) - return -EFAULT; - - if (old) { - if (!access_ok(VERIFY_WRITE, old, sizeof(*old))) - return -EFAULT; - } - - return 0; -} - -struct irix_procset { - int cmd, ltype, lid, rtype, rid; -}; - -asmlinkage int irix_sigsendset(struct irix_procset __user *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; -} |
