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879 lines
21 KiB
879 lines
21 KiB
/*
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* irixsig.c: WHEEE, IRIX signals! YOW, am I compatible or what?!?!
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*
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* Copyright (C) 1996 David S. Miller (dm@engr.sgi.com)
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* Copyright (C) 1997 - 2000 Ralf Baechle (ralf@gnu.org)
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* Copyright (C) 2000 Silicon Graphics, Inc.
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*/
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#include <linux/kernel.h>
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#include <linux/sched.h>
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#include <linux/mm.h>
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#include <linux/errno.h>
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#include <linux/smp.h>
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#include <linux/time.h>
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#include <linux/ptrace.h>
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#include <linux/resource.h>
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#include <asm/ptrace.h>
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#include <asm/uaccess.h>
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#include <asm/unistd.h>
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#undef DEBUG_SIG
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#define _S(nr) (1<<((nr)-1))
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#define _BLOCKABLE (~(_S(SIGKILL) | _S(SIGSTOP)))
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typedef struct {
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unsigned long sig[4];
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} irix_sigset_t;
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struct sigctx_irix5 {
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u32 rmask, cp0_status;
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u64 pc;
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u64 regs[32];
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u64 fpregs[32];
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u32 usedfp, fpcsr, fpeir, sstk_flags;
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u64 hi, lo;
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u64 cp0_cause, cp0_badvaddr, _unused0;
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irix_sigset_t sigset;
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u64 weird_fpu_thing;
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u64 _unused1[31];
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};
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#ifdef DEBUG_SIG
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/* Debugging */
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static inline void dump_irix5_sigctx(struct sigctx_irix5 *c)
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{
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int i;
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printk("misc: rmask[%08lx] status[%08lx] pc[%08lx]\n",
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(unsigned long) c->rmask,
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(unsigned long) c->cp0_status,
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(unsigned long) c->pc);
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printk("regs: ");
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for(i = 0; i < 16; i++)
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printk("[%d]<%08lx> ", i, (unsigned long) c->regs[i]);
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printk("\nregs: ");
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for(i = 16; i < 32; i++)
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printk("[%d]<%08lx> ", i, (unsigned long) c->regs[i]);
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printk("\nfpregs: ");
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for(i = 0; i < 16; i++)
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printk("[%d]<%08lx> ", i, (unsigned long) c->fpregs[i]);
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printk("\nfpregs: ");
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for(i = 16; i < 32; i++)
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printk("[%d]<%08lx> ", i, (unsigned long) c->fpregs[i]);
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printk("misc: usedfp[%d] fpcsr[%08lx] fpeir[%08lx] stk_flgs[%08lx]\n",
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(int) c->usedfp, (unsigned long) c->fpcsr,
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(unsigned long) c->fpeir, (unsigned long) c->sstk_flags);
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printk("misc: hi[%08lx] lo[%08lx] cause[%08lx] badvaddr[%08lx]\n",
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(unsigned long) c->hi, (unsigned long) c->lo,
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(unsigned long) c->cp0_cause, (unsigned long) c->cp0_badvaddr);
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printk("misc: sigset<0>[%08lx] sigset<1>[%08lx] sigset<2>[%08lx] "
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"sigset<3>[%08lx]\n", (unsigned long) c->sigset.sig[0],
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(unsigned long) c->sigset.sig[1],
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(unsigned long) c->sigset.sig[2],
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(unsigned long) c->sigset.sig[3]);
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}
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#endif
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static int setup_irix_frame(struct k_sigaction *ka, struct pt_regs *regs,
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int signr, sigset_t *oldmask)
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{
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struct sigctx_irix5 __user *ctx;
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unsigned long sp;
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int error, i;
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sp = regs->regs[29];
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sp -= sizeof(struct sigctx_irix5);
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sp &= ~(0xf);
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ctx = (struct sigctx_irix5 __user *) sp;
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if (!access_ok(VERIFY_WRITE, ctx, sizeof(*ctx)))
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goto segv_and_exit;
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error = __put_user(0, &ctx->weird_fpu_thing);
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error |= __put_user(~(0x00000001), &ctx->rmask);
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error |= __put_user(0, &ctx->regs[0]);
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for(i = 1; i < 32; i++)
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error |= __put_user((u64) regs->regs[i], &ctx->regs[i]);
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error |= __put_user((u64) regs->hi, &ctx->hi);
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error |= __put_user((u64) regs->lo, &ctx->lo);
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error |= __put_user((u64) regs->cp0_epc, &ctx->pc);
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error |= __put_user(!!used_math(), &ctx->usedfp);
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error |= __put_user((u64) regs->cp0_cause, &ctx->cp0_cause);
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error |= __put_user((u64) regs->cp0_badvaddr, &ctx->cp0_badvaddr);
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error |= __put_user(0, &ctx->sstk_flags); /* XXX sigstack unimp... todo... */
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error |= __copy_to_user(&ctx->sigset, oldmask, sizeof(irix_sigset_t)) ? -EFAULT : 0;
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if (error)
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goto segv_and_exit;
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#ifdef DEBUG_SIG
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dump_irix5_sigctx(ctx);
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#endif
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regs->regs[4] = (unsigned long) signr;
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regs->regs[5] = 0; /* XXX sigcode XXX */
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regs->regs[6] = regs->regs[29] = sp;
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regs->regs[7] = (unsigned long) ka->sa.sa_handler;
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regs->regs[25] = regs->cp0_epc = (unsigned long) ka->sa_restorer;
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return 1;
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segv_and_exit:
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force_sigsegv(signr, current);
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return 0;
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}
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static int inline
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setup_irix_rt_frame(struct k_sigaction * ka, struct pt_regs *regs,
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int signr, sigset_t *oldmask, siginfo_t *info)
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{
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printk("Aiee: setup_tr_frame wants to be written");
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do_exit(SIGSEGV);
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}
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static inline int handle_signal(unsigned long sig, siginfo_t *info,
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struct k_sigaction *ka, sigset_t *oldset, struct pt_regs * regs)
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{
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int ret;
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switch(regs->regs[0]) {
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case ERESTARTNOHAND:
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regs->regs[2] = EINTR;
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break;
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case ERESTARTSYS:
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if(!(ka->sa.sa_flags & SA_RESTART)) {
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regs->regs[2] = EINTR;
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break;
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}
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/* fallthrough */
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case ERESTARTNOINTR: /* Userland will reload $v0. */
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regs->cp0_epc -= 8;
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}
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regs->regs[0] = 0; /* Don't deal with this again. */
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if (ka->sa.sa_flags & SA_SIGINFO)
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ret = setup_irix_rt_frame(ka, regs, sig, oldset, info);
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else
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ret = setup_irix_frame(ka, regs, sig, oldset);
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spin_lock_irq(¤t->sighand->siglock);
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sigorsets(¤t->blocked,¤t->blocked,&ka->sa.sa_mask);
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if (!(ka->sa.sa_flags & SA_NODEFER))
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sigaddset(¤t->blocked,sig);
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recalc_sigpending();
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spin_unlock_irq(¤t->sighand->siglock);
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return ret;
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}
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void do_irix_signal(struct pt_regs *regs)
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{
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struct k_sigaction ka;
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siginfo_t info;
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int signr;
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sigset_t *oldset;
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/*
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* We want the common case to go fast, which is why we may in certain
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* cases get here from kernel mode. Just return without doing anything
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* if so.
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*/
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if (!user_mode(regs))
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return;
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if (test_thread_flag(TIF_RESTORE_SIGMASK))
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oldset = ¤t->saved_sigmask;
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else
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oldset = ¤t->blocked;
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signr = get_signal_to_deliver(&info, &ka, regs, NULL);
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if (signr > 0) {
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/* Whee! Actually deliver the signal. */
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if (handle_signal(signr, &info, &ka, oldset, regs) == 0) {
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/* a signal was successfully delivered; the saved
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* sigmask will have been stored in the signal frame,
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* and will be restored by sigreturn, so we can simply
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* clear the TIF_RESTORE_SIGMASK flag */
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if (test_thread_flag(TIF_RESTORE_SIGMASK))
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clear_thread_flag(TIF_RESTORE_SIGMASK);
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}
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return;
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}
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/*
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* Who's code doesn't conform to the restartable syscall convention
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* dies here!!! The li instruction, a single machine instruction,
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* must directly be followed by the syscall instruction.
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*/
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if (regs->regs[0]) {
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if (regs->regs[2] == ERESTARTNOHAND ||
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regs->regs[2] == ERESTARTSYS ||
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regs->regs[2] == ERESTARTNOINTR) {
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regs->cp0_epc -= 8;
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}
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if (regs->regs[2] == ERESTART_RESTARTBLOCK) {
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regs->regs[2] = __NR_restart_syscall;
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regs->regs[7] = regs->regs[26];
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regs->cp0_epc -= 4;
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}
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regs->regs[0] = 0; /* Don't deal with this again. */
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}
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/*
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* If there's no signal to deliver, we just put the saved sigmask
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* back
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*/
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if (test_thread_flag(TIF_RESTORE_SIGMASK)) {
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clear_thread_flag(TIF_RESTORE_SIGMASK);
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sigprocmask(SIG_SETMASK, ¤t->saved_sigmask, NULL);
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}
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}
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asmlinkage void
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irix_sigreturn(struct pt_regs *regs)
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{
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struct sigctx_irix5 __user *context, *magic;
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unsigned long umask, mask;
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u64 *fregs;
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u32 usedfp;
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int error, sig, i, base = 0;
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sigset_t blocked;
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/* Always make any pending restarted system calls return -EINTR */
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current_thread_info()->restart_block.fn = do_no_restart_syscall;
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if (regs->regs[2] == 1000)
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base = 1;
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context = (struct sigctx_irix5 __user *) regs->regs[base + 4];
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magic = (struct sigctx_irix5 __user *) regs->regs[base + 5];
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sig = (int) regs->regs[base + 6];
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#ifdef DEBUG_SIG
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printk("[%s:%d] IRIX sigreturn(scp[%p],ucp[%p],sig[%d])\n",
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current->comm, current->pid, context, magic, sig);
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#endif
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if (!context)
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context = magic;
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if (!access_ok(VERIFY_READ, context, sizeof(struct sigctx_irix5)))
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goto badframe;
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#ifdef DEBUG_SIG
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dump_irix5_sigctx(context);
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#endif
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error = __get_user(regs->cp0_epc, &context->pc);
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error |= __get_user(umask, &context->rmask);
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mask = 2;
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for (i = 1; i < 32; i++, mask <<= 1) {
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if (umask & mask)
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error |= __get_user(regs->regs[i], &context->regs[i]);
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}
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error |= __get_user(regs->hi, &context->hi);
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error |= __get_user(regs->lo, &context->lo);
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error |= __get_user(usedfp, &context->usedfp);
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if ((umask & 1) && usedfp) {
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fregs = (u64 *) ¤t->thread.fpu;
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for(i = 0; i < 32; i++)
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error |= __get_user(fregs[i], &context->fpregs[i]);
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error |= __get_user(current->thread.fpu.fcr31, &context->fpcsr);
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}
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/* XXX do sigstack crapola here... XXX */
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error |= __copy_from_user(&blocked, &context->sigset, sizeof(blocked)) ? -EFAULT : 0;
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if (error)
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goto badframe;
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sigdelsetmask(&blocked, ~_BLOCKABLE);
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spin_lock_irq(¤t->sighand->siglock);
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current->blocked = blocked;
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recalc_sigpending();
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spin_unlock_irq(¤t->sighand->siglock);
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/*
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* Don't let your children do this ...
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*/
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__asm__ __volatile__(
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"move\t$29,%0\n\t"
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"j\tsyscall_exit"
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:/* no outputs */
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:"r" (®s));
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/* Unreached */
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badframe:
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force_sig(SIGSEGV, current);
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}
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struct sigact_irix5 {
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int flags;
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void (*handler)(int);
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u32 sigset[4];
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int _unused0[2];
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};
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#define SIG_SETMASK32 256 /* Goodie from SGI for BSD compatibility:
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set only the low 32 bit of the sigset. */
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#ifdef DEBUG_SIG
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static inline void dump_sigact_irix5(struct sigact_irix5 *p)
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{
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printk("<f[%d] hndlr[%08lx] msk[%08lx]>", p->flags,
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(unsigned long) p->handler,
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(unsigned long) p->sigset[0]);
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}
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#endif
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asmlinkage int
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irix_sigaction(int sig, const struct sigaction __user *act,
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struct sigaction __user *oact, void __user *trampoline)
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{
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struct k_sigaction new_ka, old_ka;
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int ret;
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#ifdef DEBUG_SIG
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printk(" (%d,%s,%s,%08lx) ", sig, (!new ? "0" : "NEW"),
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(!old ? "0" : "OLD"), trampoline);
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if(new) {
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dump_sigact_irix5(new); printk(" ");
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}
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#endif
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if (act) {
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sigset_t mask;
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int err;
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if (!access_ok(VERIFY_READ, act, sizeof(*act)))
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return -EFAULT;
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err = __get_user(new_ka.sa.sa_handler, &act->sa_handler);
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err |= __get_user(new_ka.sa.sa_flags, &act->sa_flags);
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err |= __copy_from_user(&mask, &act->sa_mask, sizeof(sigset_t)) ? -EFAULT : 0;
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if (err)
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return err;
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/*
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* Hmmm... methinks IRIX libc always passes a valid trampoline
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* value for all invocations of sigaction. Will have to
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* investigate. POSIX POSIX, die die die...
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*/
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new_ka.sa_restorer = trampoline;
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}
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/* XXX Implement SIG_SETMASK32 for IRIX compatibility */
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ret = do_sigaction(sig, act ? &new_ka : NULL, oact ? &old_ka : NULL);
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if (!ret && oact) {
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int err;
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if (!access_ok(VERIFY_WRITE, oact, sizeof(*oact)))
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return -EFAULT;
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err = __put_user(old_ka.sa.sa_handler, &oact->sa_handler);
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err |= __put_user(old_ka.sa.sa_flags, &oact->sa_flags);
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err |= __copy_to_user(&oact->sa_mask, &old_ka.sa.sa_mask,
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sizeof(sigset_t)) ? -EFAULT : 0;
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if (err)
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return -EFAULT;
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}
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return ret;
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}
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asmlinkage int irix_sigpending(irix_sigset_t __user *set)
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{
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return do_sigpending(set, sizeof(*set));
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}
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asmlinkage int irix_sigprocmask(int how, irix_sigset_t __user *new,
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irix_sigset_t __user *old)
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{
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sigset_t oldbits, newbits;
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if (new) {
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if (!access_ok(VERIFY_READ, new, sizeof(*new)))
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return -EFAULT;
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if (__copy_from_user(&newbits, new, sizeof(unsigned long)*4))
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return -EFAULT;
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sigdelsetmask(&newbits, ~_BLOCKABLE);
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spin_lock_irq(¤t->sighand->siglock);
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oldbits = current->blocked;
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switch(how) {
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case 1:
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sigorsets(&newbits, &oldbits, &newbits);
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break;
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case 2:
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sigandsets(&newbits, &oldbits, &newbits);
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break;
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case 3:
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break;
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case 256:
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siginitset(&newbits, newbits.sig[0]);
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break;
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default:
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return -EINVAL;
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}
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recalc_sigpending();
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spin_unlock_irq(¤t->sighand->siglock);
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}
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if (old)
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return copy_to_user(old, ¤t->blocked,
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sizeof(unsigned long)*4) ? -EFAULT : 0;
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return 0;
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}
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asmlinkage int irix_sigsuspend(struct pt_regs *regs)
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{
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sigset_t newset;
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sigset_t __user *uset;
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uset = (sigset_t __user *) regs->regs[4];
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if (copy_from_user(&newset, uset, sizeof(sigset_t)))
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return -EFAULT;
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sigdelsetmask(&newset, ~_BLOCKABLE);
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spin_lock_irq(¤t->sighand->siglock);
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current->saved_sigmask = current->blocked;
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current->blocked = newset;
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recalc_sigpending();
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spin_unlock_irq(¤t->sighand->siglock);
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current->state = TASK_INTERRUPTIBLE;
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schedule();
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set_thread_flag(TIF_RESTORE_SIGMASK);
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return -ERESTARTNOHAND;
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}
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/* hate hate hate... */
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struct irix5_siginfo {
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int sig, code, error;
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union {
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char unused[128 - (3 * 4)]; /* Safety net. */
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struct {
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int pid;
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union {
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int uid;
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struct {
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int utime, status, stime;
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} child;
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} procdata;
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} procinfo;
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unsigned long fault_addr;
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struct {
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int fd;
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long band;
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} fileinfo;
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unsigned long sigval;
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} stuff;
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};
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asmlinkage int irix_sigpoll_sys(unsigned long __user *set,
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struct irix5_siginfo __user *info, struct timespec __user *tp)
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{
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long expire = MAX_SCHEDULE_TIMEOUT;
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sigset_t kset;
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int i, sig, error, timeo = 0;
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struct timespec ktp;
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#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<=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)
|
|
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 pid,
|
|
struct irix5_siginfo __user *info, int options,
|
|
struct rusage __user *ru)
|
|
{
|
|
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;
|
|
|
|
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) && 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);
|
|
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(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)
|
|
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(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)
|
|
return retval;
|
|
|
|
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);
|
|
|
|
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;
|
|
}
|
|
|