irixsig.c
上传用户:lgb322
上传日期:2013-02-24
资源大小:30529k
文件大小:22k
- /*
- * irixsig.c: WHEEE, IRIX signals! YOW, am I compatable 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 <asm/ptrace.h>
- #include <asm/uaccess.h>
- extern asmlinkage void syscall_trace(void);
- #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(current->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.sa_restorer;
- return;
- segv_and_exit:
- if (signr == SIGSEGV)
- ka->sa.sa_handler = SIG_DFL;
- force_sig(SIGSEGV, 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, struct k_sigaction *ka,
- siginfo_t *info, sigset_t *oldset, struct pt_regs * regs)
- {
- 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_ONESHOT)
- ka->sa.sa_handler = SIG_DFL;
- if (!(ka->sa.sa_flags & SA_NODEFER)) {
- spin_lock_irq(¤t->sigmask_lock);
- sigorsets(¤t->blocked,¤t->blocked,&ka->sa.sa_mask);
- sigaddset(¤t->blocked,sig);
- recalc_sigpending(current);
- spin_unlock_irq(¤t->sigmask_lock);
- }
- }
- static inline void syscall_restart(struct pt_regs *regs, struct k_sigaction *ka)
- {
- 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. */
- }
- asmlinkage int do_irix_signal(sigset_t *oldset, struct pt_regs *regs)
- {
- struct k_sigaction *ka;
- siginfo_t info;
- if (!oldset)
- oldset = ¤t->blocked;
- for (;;) {
- unsigned long signr;
- spin_lock_irq(¤t->sigmask_lock);
- signr = dequeue_signal(¤t->blocked, &info);
- spin_unlock_irq(¤t->sigmask_lock);
- if (!signr)
- break;
- if ((current->ptrace & PT_PTRACED) && signr != SIGKILL) {
- /* Let the debugger run. */
- current->exit_code = signr;
- current->state = TASK_STOPPED;
- notify_parent(current, SIGCHLD);
- schedule();
- /* We're back. Did the debugger cancel the sig? */
- if (!(signr = current->exit_code))
- continue;
- current->exit_code = 0;
- /* The debugger continued. Ignore SIGSTOP. */
- if (signr == SIGSTOP)
- continue;
- /* Update the siginfo structure. Is this good? */
- if (signr != info.si_signo) {
- info.si_signo = signr;
- info.si_errno = 0;
- info.si_code = SI_USER;
- info.si_pid = current->p_pptr->pid;
- info.si_uid = current->p_pptr->uid;
- }
- /* If the (new) signal is now blocked, requeue it. */
- if (sigismember(¤t->blocked, signr)) {
- send_sig_info(signr, &info, current);
- continue;
- }
- }
- ka = ¤t->sig->action[signr-1];
- if (ka->sa.sa_handler == SIG_IGN) {
- if (signr != SIGCHLD)
- continue;
- /* Check for SIGCHLD: it's special. */
- while (sys_wait4(-1, NULL, WNOHANG, NULL) > 0)
- /* nothing */;
- continue;
- }
- if (ka->sa.sa_handler == SIG_DFL) {
- int exit_code = signr;
- /* Init gets no signals it doesn't want. */
- if (current->pid == 1)
- continue;
- switch (signr) {
- case SIGCONT: case SIGCHLD: case SIGWINCH:
- continue;
- case SIGTSTP: case SIGTTIN: case SIGTTOU:
- if (is_orphaned_pgrp(current->pgrp))
- continue;
- /* FALLTHRU */
- case SIGSTOP:
- current->state = TASK_STOPPED;
- current->exit_code = signr;
- if (!(current->p_pptr->sig->action[SIGCHLD-1].sa.sa_flags & SA_NOCLDSTOP))
- notify_parent(current, SIGCHLD);
- schedule();
- continue;
- case SIGQUIT: case SIGILL: case SIGTRAP:
- case SIGABRT: case SIGFPE: case SIGSEGV:
- if (do_coredump(signr, regs))
- exit_code |= 0x80;
- /* FALLTHRU */
- default:
- sigaddset(¤t->pending.signal, signr);
- recalc_sigpending(current);
- current->flags |= PF_SIGNALED;
- do_exit(exit_code);
- /* NOTREACHED */
- }
- }
- if (regs->regs[0])
- syscall_restart(regs, ka);
- /* Whee! Actually deliver the signal. */
- handle_signal(signr, ka, &info, oldset, regs);
- return 1;
- }
- /*
- * 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;
- 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 *) ¤t->thread.fpu;
- for(i = 0; i < 32; i++)
- fregs[i] = (u64) context->fpregs[i];
- __get_user(current->thread.fpu.hard.control, &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(¤t->sigmask_lock);
- current->blocked = blocked;
- recalc_sigpending(current);
- spin_unlock_irq(¤t->sigmask_lock);
- /*
- * Don't let your children do this ...
- */
- if (current->ptrace & PT_TRACESYS)
- syscall_trace();
- __asm__ __volatile__(
- "movet$29,%0nt"
- "jtret_from_sys_call"
- :/* no outputs */
- :"r" (®s));
- /* 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 (verify_area(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.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 (verify_area(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;
- int error;
- if (new) {
- error = verify_area(VERIFY_READ, new, sizeof(*new));
- if (error)
- return error;
- __copy_from_user(&newbits, new, sizeof(unsigned long)*4);
- sigdelsetmask(&newbits, ~_BLOCKABLE);
- spin_lock_irq(¤t->sigmask_lock);
- 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(current);
- spin_unlock_irq(¤t->sigmask_lock);
- }
- if(old) {
- error = verify_area(VERIFY_WRITE, old, sizeof(*old));
- if(error)
- return error;
- __copy_to_user(old, ¤t->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(¤t->sigmask_lock);
- saveset = current->blocked;
- current->blocked = newset;
- recalc_sigpending(current);
- spin_unlock_irq(¤t->sigmask_lock);
- 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;
- error = verify_area(VERIFY_READ, set, sizeof(kset));
- if (error)
- 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) {
- error = verify_area(VERIFY_READ, tp, sizeof(*tp));
- if(error)
- return error;
- 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 (¤t->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 P_PID 0
- #define P_PGID 2
- #define P_ALL 7
- extern int getrusage(struct task_struct *, int, struct rusage *);
- #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 *p;
- if (!info) {
- retval = -EINVAL;
- goto out;
- }
- retval = verify_area(VERIFY_WRITE, info, sizeof(*info));
- if(retval)
- goto out;
- if (ru) {
- retval = verify_area(VERIFY_WRITE, ru, sizeof(*ru));
- if(retval)
- goto out;
- }
- if (options & ~(W_MASK)) {
- retval = -EINVAL;
- goto out;
- }
- if (type != P_PID && type != P_PGID && type != P_ALL) {
- retval = -EINVAL;
- goto out;
- }
- add_wait_queue(¤t->wait_chldexit, &wait);
- repeat:
- flag = 0;
- current->state = TASK_INTERRUPTIBLE;
- read_lock(&tasklist_lock);
- for (p = current->p_cptr; p; p = p->p_osptr) {
- if ((type == P_PID) && p->pid != pid)
- continue;
- if ((type == P_PGID) && p->pgrp != 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;
- if (ru != NULL)
- getrusage(p, RUSAGE_BOTH, ru);
- __put_user(SIGCHLD, &info->sig);
- __put_user(0, &info->code);
- __put_user(p->pid, &info->stuff.procinfo.pid);
- __put_user((p->exit_code >> 8) & 0xff,
- &info->stuff.procinfo.procdata.child.status);
- __put_user(p->times.tms_utime, &info->stuff.procinfo.procdata.child.utime);
- __put_user(p->times.tms_stime, &info->stuff.procinfo.procdata.child.stime);
- p->exit_code = 0;
- retval = 0;
- goto end_waitsys;
- case TASK_ZOMBIE:
- current->times.tms_cutime += p->times.tms_utime + p->times.tms_cutime;
- current->times.tms_cstime += p->times.tms_stime + p->times.tms_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->times.tms_utime,
- &info->stuff.procinfo.procdata.child.utime);
- __put_user(p->times.tms_stime,
- &info->stuff.procinfo.procdata.child.stime);
- retval = 0;
- if (p->p_opptr != p->p_pptr) {
- REMOVE_LINKS(p);
- p->p_pptr = p->p_opptr;
- SET_LINKS(p);
- notify_parent(p, SIGCHLD);
- } else
- release_task(p);
- goto end_waitsys;
- default:
- continue;
- }
- }
- 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->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 error, 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
- error = verify_area(VERIFY_WRITE, ctx, sizeof(*ctx));
- if(error)
- goto out;
- __put_user(current->thread.irix_oldctx, &ctx->link);
- __copy_to_user(&ctx->sigmask, ¤t->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(!current->used_math) {
- flags &= ~(0x08);
- } else {
- /* XXX wheee... */
- printk("Wheee, no code for saving IRIX FPU context yet.n");
- }
- __put_user(flags, &ctx->flags);
- error = 0;
- out:
- return error;
- }
- 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
- error = verify_area(VERIFY_READ, ctx, sizeof(*ctx));
- if (error)
- goto out;
- if (ctx->flags & 0x02) {
- /* XXX sigstack garbage, todo... */
- printk("Wheee, cannot do sigstack stuff in setcontextn");
- }
- 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;
- #ifdef DEBUG_SIG
- printk("[%s:%d] irix_sigstack(%p,%p)n",
- current->comm, current->pid, new, old);
- #endif
- if(new) {
- error = verify_area(VERIFY_READ, new, sizeof(*new));
- if(error)
- goto out;
- }
- if(old) {
- error = verify_area(VERIFY_WRITE, old, sizeof(*old));
- if(error)
- 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;
- #ifdef DEBUG_SIG
- printk("[%s:%d] irix_sigaltstack(%p,%p)n",
- current->comm, current->pid, new, old);
- #endif
- if (new) {
- error = verify_area(VERIFY_READ, new, sizeof(*new));
- if(error)
- goto out;
- }
- if (old) {
- error = verify_area(VERIFY_WRITE, old, sizeof(*old));
- if(error)
- 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)
- {
- int error;
- error = verify_area(VERIFY_READ, pset, sizeof(*pset));
- if(error)
- goto out;
- #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
- error = -EINVAL;
- out:
- return error;
- }