| 1 |
1275 |
phoenix |
/* $Id: signal.c,v 1.1.1.1 2004-04-15 01:34:14 phoenix Exp $
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* arch/sparc64/kernel/signal.c
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*
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* Copyright (C) 1991, 1992 Linus Torvalds
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* Copyright (C) 1995 David S. Miller (davem@caip.rutgers.edu)
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* Copyright (C) 1996 Miguel de Icaza (miguel@nuclecu.unam.mx)
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* Copyright (C) 1997 Eddie C. Dost (ecd@skynet.be)
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* Copyright (C) 1997,1998 Jakub Jelinek (jj@sunsite.mff.cuni.cz)
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*/
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#include <linux/config.h>
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#include <linux/sched.h>
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#include <linux/kernel.h>
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| 14 |
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#include <linux/signal.h>
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| 15 |
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#include <linux/errno.h>
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| 16 |
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#include <linux/wait.h>
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| 17 |
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#include <linux/ptrace.h>
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| 18 |
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#include <linux/unistd.h>
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#include <linux/mm.h>
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#include <linux/smp_lock.h>
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| 22 |
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#include <asm/uaccess.h>
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#include <asm/bitops.h>
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#include <asm/ptrace.h>
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| 25 |
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#include <asm/svr4.h>
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| 26 |
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#include <asm/pgtable.h>
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| 27 |
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#include <asm/fpumacro.h>
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#include <asm/uctx.h>
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#include <asm/siginfo.h>
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#include <asm/visasm.h>
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| 32 |
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#define _BLOCKABLE (~(sigmask(SIGKILL) | sigmask(SIGSTOP)))
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| 34 |
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asmlinkage int do_signal(sigset_t *oldset, struct pt_regs * regs,
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unsigned long orig_o0, int ret_from_syscall);
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| 37 |
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/* This turned off for production... */
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/* #define DEBUG_SIGNALS 1 */
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/* #define DEBUG_SIGNALS_TRACE 1 */
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/* #define DEBUG_SIGNALS_MAPS 1 */
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| 42 |
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int copy_siginfo_to_user(siginfo_t *to, siginfo_t *from)
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{
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if (!access_ok (VERIFY_WRITE, to, sizeof(siginfo_t)))
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return -EFAULT;
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if (from->si_code < 0)
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return __copy_to_user(to, from, sizeof(siginfo_t));
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else {
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int err;
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/* If you change siginfo_t structure, please be sure
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this code is fixed accordingly.
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It should never copy any pad contained in the structure
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to avoid security leaks, but must copy the generic
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3 ints plus the relevant union member. */
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err = __put_user(*(long *)&from->si_signo, (long *)&to->si_signo);
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err |= __put_user((short)from->si_code, &to->si_code);
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| 58 |
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switch (from->si_code >> 16) {
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| 59 |
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case __SI_CHLD >> 16:
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err |= __put_user(from->si_utime, &to->si_utime);
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err |= __put_user(from->si_stime, &to->si_stime);
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case __SI_FAULT >> 16:
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case __SI_POLL >> 16:
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err |= __put_user(from->si_trapno, &to->si_trapno);
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default:
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err |= __put_user(from->si_addr, &to->si_addr);
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break;
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/* case __SI_RT: This is not generated by the kernel as of now. */
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}
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| 70 |
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return err;
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}
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}
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/* {set, get}context() needed for 64-bit SparcLinux userland. */
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asmlinkage void sparc64_set_context(struct pt_regs *regs)
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{
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struct ucontext *ucp = (struct ucontext *) regs->u_regs[UREG_I0];
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struct thread_struct *tp = ¤t->thread;
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| 79 |
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mc_gregset_t *grp;
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| 80 |
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unsigned long pc, npc, tstate;
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| 81 |
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unsigned long fp, i7;
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| 82 |
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unsigned char fenab;
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| 83 |
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int err;
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| 84 |
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| 85 |
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flush_user_windows();
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if(tp->w_saved ||
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(((unsigned long)ucp) & (sizeof(unsigned long)-1)) ||
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(!__access_ok((unsigned long)ucp, sizeof(*ucp))))
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| 89 |
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goto do_sigsegv;
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| 90 |
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grp = &ucp->uc_mcontext.mc_gregs;
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| 91 |
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err = __get_user(pc, &((*grp)[MC_PC]));
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| 92 |
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err |= __get_user(npc, &((*grp)[MC_NPC]));
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if(err || ((pc | npc) & 3))
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goto do_sigsegv;
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| 95 |
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if(regs->u_regs[UREG_I1]) {
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| 96 |
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sigset_t set;
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| 97 |
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| 98 |
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if (_NSIG_WORDS == 1) {
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| 99 |
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if (__get_user(set.sig[0], &ucp->uc_sigmask.sig[0]))
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goto do_sigsegv;
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| 101 |
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} else {
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| 102 |
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if (__copy_from_user(&set, &ucp->uc_sigmask, sizeof(sigset_t)))
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goto do_sigsegv;
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| 104 |
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}
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| 105 |
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sigdelsetmask(&set, ~_BLOCKABLE);
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| 106 |
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spin_lock_irq(¤t->sigmask_lock);
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current->blocked = set;
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| 108 |
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recalc_sigpending(current);
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| 109 |
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spin_unlock_irq(¤t->sigmask_lock);
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| 110 |
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}
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| 111 |
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if ((tp->flags & SPARC_FLAG_32BIT) != 0) {
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| 112 |
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pc &= 0xffffffff;
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| 113 |
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npc &= 0xffffffff;
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| 114 |
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}
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regs->tpc = pc;
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| 116 |
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regs->tnpc = npc;
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| 117 |
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err |= __get_user(regs->y, &((*grp)[MC_Y]));
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err |= __get_user(tstate, &((*grp)[MC_TSTATE]));
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regs->tstate &= ~(TSTATE_ICC | TSTATE_XCC);
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| 120 |
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regs->tstate |= (tstate & (TSTATE_ICC | TSTATE_XCC));
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| 121 |
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err |= __get_user(regs->u_regs[UREG_G1], (&(*grp)[MC_G1]));
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err |= __get_user(regs->u_regs[UREG_G2], (&(*grp)[MC_G2]));
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| 123 |
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err |= __get_user(regs->u_regs[UREG_G3], (&(*grp)[MC_G3]));
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err |= __get_user(regs->u_regs[UREG_G4], (&(*grp)[MC_G4]));
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| 125 |
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err |= __get_user(regs->u_regs[UREG_G5], (&(*grp)[MC_G5]));
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| 126 |
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err |= __get_user(regs->u_regs[UREG_G6], (&(*grp)[MC_G6]));
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| 127 |
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err |= __get_user(regs->u_regs[UREG_G7], (&(*grp)[MC_G7]));
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| 128 |
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err |= __get_user(regs->u_regs[UREG_I0], (&(*grp)[MC_O0]));
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| 129 |
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err |= __get_user(regs->u_regs[UREG_I1], (&(*grp)[MC_O1]));
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err |= __get_user(regs->u_regs[UREG_I2], (&(*grp)[MC_O2]));
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| 131 |
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err |= __get_user(regs->u_regs[UREG_I3], (&(*grp)[MC_O3]));
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err |= __get_user(regs->u_regs[UREG_I4], (&(*grp)[MC_O4]));
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| 133 |
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err |= __get_user(regs->u_regs[UREG_I5], (&(*grp)[MC_O5]));
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err |= __get_user(regs->u_regs[UREG_I6], (&(*grp)[MC_O6]));
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| 135 |
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err |= __get_user(regs->u_regs[UREG_I7], (&(*grp)[MC_O7]));
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| 136 |
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| 137 |
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err |= __get_user(fp, &(ucp->uc_mcontext.mc_fp));
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| 138 |
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err |= __get_user(i7, &(ucp->uc_mcontext.mc_i7));
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| 139 |
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err |= __put_user(fp,
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| 140 |
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(&(((struct reg_window *)(STACK_BIAS+regs->u_regs[UREG_I6]))->ins[6])));
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| 141 |
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err |= __put_user(i7,
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| 142 |
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(&(((struct reg_window *)(STACK_BIAS+regs->u_regs[UREG_I6]))->ins[7])));
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| 143 |
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| 144 |
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err |= __get_user(fenab, &(ucp->uc_mcontext.mc_fpregs.mcfpu_enab));
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| 145 |
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if(fenab) {
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| 146 |
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unsigned long *fpregs = (unsigned long *)(((char *)current) + AOFF_task_fpregs);
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| 147 |
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unsigned long fprs;
|
| 148 |
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| 149 |
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fprs_write(0);
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| 150 |
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err |= __get_user(fprs, &(ucp->uc_mcontext.mc_fpregs.mcfpu_fprs));
|
| 151 |
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if (fprs & FPRS_DL)
|
| 152 |
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err |= copy_from_user(fpregs,
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| 153 |
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&(ucp->uc_mcontext.mc_fpregs.mcfpu_fregs),
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| 154 |
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(sizeof(unsigned int) * 32));
|
| 155 |
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if (fprs & FPRS_DU)
|
| 156 |
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err |= copy_from_user(fpregs+16,
|
| 157 |
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((unsigned long *)&(ucp->uc_mcontext.mc_fpregs.mcfpu_fregs))+16,
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| 158 |
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(sizeof(unsigned int) * 32));
|
| 159 |
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err |= __get_user(current->thread.xfsr[0],
|
| 160 |
|
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&(ucp->uc_mcontext.mc_fpregs.mcfpu_fsr));
|
| 161 |
|
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err |= __get_user(current->thread.gsr[0],
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| 162 |
|
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&(ucp->uc_mcontext.mc_fpregs.mcfpu_gsr));
|
| 163 |
|
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regs->tstate &= ~TSTATE_PEF;
|
| 164 |
|
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}
|
| 165 |
|
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if (err)
|
| 166 |
|
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goto do_sigsegv;
|
| 167 |
|
|
|
| 168 |
|
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return;
|
| 169 |
|
|
do_sigsegv:
|
| 170 |
|
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do_exit(SIGSEGV);
|
| 171 |
|
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}
|
| 172 |
|
|
|
| 173 |
|
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asmlinkage void sparc64_get_context(struct pt_regs *regs)
|
| 174 |
|
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{
|
| 175 |
|
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struct ucontext *ucp = (struct ucontext *) regs->u_regs[UREG_I0];
|
| 176 |
|
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struct thread_struct *tp = ¤t->thread;
|
| 177 |
|
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mc_gregset_t *grp;
|
| 178 |
|
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mcontext_t *mcp;
|
| 179 |
|
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unsigned long fp, i7;
|
| 180 |
|
|
unsigned char fenab;
|
| 181 |
|
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int err;
|
| 182 |
|
|
|
| 183 |
|
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synchronize_user_stack();
|
| 184 |
|
|
if(tp->w_saved || clear_user(ucp, sizeof(*ucp)))
|
| 185 |
|
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goto do_sigsegv;
|
| 186 |
|
|
|
| 187 |
|
|
#if 1
|
| 188 |
|
|
fenab = 0; /* IMO get_context is like any other system call, thus modifies FPU state -jj */
|
| 189 |
|
|
#else
|
| 190 |
|
|
fenab = (current->thread.fpsaved[0] & FPRS_FEF);
|
| 191 |
|
|
#endif
|
| 192 |
|
|
|
| 193 |
|
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mcp = &ucp->uc_mcontext;
|
| 194 |
|
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grp = &mcp->mc_gregs;
|
| 195 |
|
|
|
| 196 |
|
|
/* Skip over the trap instruction, first. */
|
| 197 |
|
|
if ((tp->flags & SPARC_FLAG_32BIT) != 0) {
|
| 198 |
|
|
regs->tpc = (regs->tnpc & 0xffffffff);
|
| 199 |
|
|
regs->tnpc = (regs->tnpc + 4) & 0xffffffff;
|
| 200 |
|
|
} else {
|
| 201 |
|
|
regs->tpc = regs->tnpc;
|
| 202 |
|
|
regs->tnpc += 4;
|
| 203 |
|
|
}
|
| 204 |
|
|
err = 0;
|
| 205 |
|
|
if (_NSIG_WORDS == 1)
|
| 206 |
|
|
err |= __put_user(current->blocked.sig[0],
|
| 207 |
|
|
(unsigned long *)&ucp->uc_sigmask);
|
| 208 |
|
|
else
|
| 209 |
|
|
err |= __copy_to_user(&ucp->uc_sigmask, ¤t->blocked,
|
| 210 |
|
|
sizeof(sigset_t));
|
| 211 |
|
|
|
| 212 |
|
|
err |= __put_user(regs->tstate, &((*grp)[MC_TSTATE]));
|
| 213 |
|
|
err |= __put_user(regs->tpc, &((*grp)[MC_PC]));
|
| 214 |
|
|
err |= __put_user(regs->tnpc, &((*grp)[MC_NPC]));
|
| 215 |
|
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err |= __put_user(regs->y, &((*grp)[MC_Y]));
|
| 216 |
|
|
err |= __put_user(regs->u_regs[UREG_G1], &((*grp)[MC_G1]));
|
| 217 |
|
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err |= __put_user(regs->u_regs[UREG_G2], &((*grp)[MC_G2]));
|
| 218 |
|
|
err |= __put_user(regs->u_regs[UREG_G3], &((*grp)[MC_G3]));
|
| 219 |
|
|
err |= __put_user(regs->u_regs[UREG_G4], &((*grp)[MC_G4]));
|
| 220 |
|
|
err |= __put_user(regs->u_regs[UREG_G5], &((*grp)[MC_G5]));
|
| 221 |
|
|
err |= __put_user(regs->u_regs[UREG_G6], &((*grp)[MC_G6]));
|
| 222 |
|
|
err |= __put_user(regs->u_regs[UREG_G7], &((*grp)[MC_G7]));
|
| 223 |
|
|
err |= __put_user(regs->u_regs[UREG_I0], &((*grp)[MC_O0]));
|
| 224 |
|
|
err |= __put_user(regs->u_regs[UREG_I1], &((*grp)[MC_O1]));
|
| 225 |
|
|
err |= __put_user(regs->u_regs[UREG_I2], &((*grp)[MC_O2]));
|
| 226 |
|
|
err |= __put_user(regs->u_regs[UREG_I3], &((*grp)[MC_O3]));
|
| 227 |
|
|
err |= __put_user(regs->u_regs[UREG_I4], &((*grp)[MC_O4]));
|
| 228 |
|
|
err |= __put_user(regs->u_regs[UREG_I5], &((*grp)[MC_O5]));
|
| 229 |
|
|
err |= __put_user(regs->u_regs[UREG_I6], &((*grp)[MC_O6]));
|
| 230 |
|
|
err |= __put_user(regs->u_regs[UREG_I7], &((*grp)[MC_O7]));
|
| 231 |
|
|
|
| 232 |
|
|
err |= __get_user(fp,
|
| 233 |
|
|
(&(((struct reg_window *)(STACK_BIAS+regs->u_regs[UREG_I6]))->ins[6])));
|
| 234 |
|
|
err |= __get_user(i7,
|
| 235 |
|
|
(&(((struct reg_window *)(STACK_BIAS+regs->u_regs[UREG_I6]))->ins[7])));
|
| 236 |
|
|
err |= __put_user(fp, &(mcp->mc_fp));
|
| 237 |
|
|
err |= __put_user(i7, &(mcp->mc_i7));
|
| 238 |
|
|
|
| 239 |
|
|
err |= __put_user(fenab, &(mcp->mc_fpregs.mcfpu_enab));
|
| 240 |
|
|
if(fenab) {
|
| 241 |
|
|
unsigned long *fpregs = (unsigned long *)(((char *)current) + AOFF_task_fpregs);
|
| 242 |
|
|
unsigned long fprs;
|
| 243 |
|
|
|
| 244 |
|
|
fprs = current->thread.fpsaved[0];
|
| 245 |
|
|
if (fprs & FPRS_DL)
|
| 246 |
|
|
err |= copy_to_user(&(mcp->mc_fpregs.mcfpu_fregs), fpregs,
|
| 247 |
|
|
(sizeof(unsigned int) * 32));
|
| 248 |
|
|
if (fprs & FPRS_DU)
|
| 249 |
|
|
err |= copy_to_user(
|
| 250 |
|
|
((unsigned long *)&(mcp->mc_fpregs.mcfpu_fregs))+16, fpregs+16,
|
| 251 |
|
|
(sizeof(unsigned int) * 32));
|
| 252 |
|
|
err |= __put_user(current->thread.xfsr[0], &(mcp->mc_fpregs.mcfpu_fsr));
|
| 253 |
|
|
err |= __put_user(current->thread.gsr[0], &(mcp->mc_fpregs.mcfpu_gsr));
|
| 254 |
|
|
err |= __put_user(fprs, &(mcp->mc_fpregs.mcfpu_fprs));
|
| 255 |
|
|
}
|
| 256 |
|
|
if (err)
|
| 257 |
|
|
goto do_sigsegv;
|
| 258 |
|
|
|
| 259 |
|
|
return;
|
| 260 |
|
|
do_sigsegv:
|
| 261 |
|
|
do_exit(SIGSEGV);
|
| 262 |
|
|
}
|
| 263 |
|
|
|
| 264 |
|
|
struct rt_signal_frame {
|
| 265 |
|
|
struct sparc_stackf ss;
|
| 266 |
|
|
siginfo_t info;
|
| 267 |
|
|
struct pt_regs regs;
|
| 268 |
|
|
__siginfo_fpu_t * fpu_save;
|
| 269 |
|
|
stack_t stack;
|
| 270 |
|
|
sigset_t mask;
|
| 271 |
|
|
__siginfo_fpu_t fpu_state;
|
| 272 |
|
|
};
|
| 273 |
|
|
|
| 274 |
|
|
/* Align macros */
|
| 275 |
|
|
#define RT_ALIGNEDSZ (((sizeof(struct rt_signal_frame) + 7) & (~7)))
|
| 276 |
|
|
|
| 277 |
|
|
/*
|
| 278 |
|
|
* atomically swap in the new signal mask, and wait for a signal.
|
| 279 |
|
|
* This is really tricky on the Sparc, watch out...
|
| 280 |
|
|
*/
|
| 281 |
|
|
asmlinkage void _sigpause_common(old_sigset_t set, struct pt_regs *regs)
|
| 282 |
|
|
{
|
| 283 |
|
|
sigset_t saveset;
|
| 284 |
|
|
|
| 285 |
|
|
#ifdef CONFIG_SPARC32_COMPAT
|
| 286 |
|
|
if (current->thread.flags & SPARC_FLAG_32BIT) {
|
| 287 |
|
|
extern asmlinkage void _sigpause32_common(old_sigset_t32,
|
| 288 |
|
|
struct pt_regs *);
|
| 289 |
|
|
_sigpause32_common(set, regs);
|
| 290 |
|
|
return;
|
| 291 |
|
|
}
|
| 292 |
|
|
#endif
|
| 293 |
|
|
set &= _BLOCKABLE;
|
| 294 |
|
|
spin_lock_irq(¤t->sigmask_lock);
|
| 295 |
|
|
saveset = current->blocked;
|
| 296 |
|
|
siginitset(¤t->blocked, set);
|
| 297 |
|
|
recalc_sigpending(current);
|
| 298 |
|
|
spin_unlock_irq(¤t->sigmask_lock);
|
| 299 |
|
|
|
| 300 |
|
|
if ((current->thread.flags & SPARC_FLAG_32BIT) != 0) {
|
| 301 |
|
|
regs->tpc = (regs->tnpc & 0xffffffff);
|
| 302 |
|
|
regs->tnpc = (regs->tnpc + 4) & 0xffffffff;
|
| 303 |
|
|
} else {
|
| 304 |
|
|
regs->tpc = regs->tnpc;
|
| 305 |
|
|
regs->tnpc += 4;
|
| 306 |
|
|
}
|
| 307 |
|
|
|
| 308 |
|
|
/* Condition codes and return value where set here for sigpause,
|
| 309 |
|
|
* and so got used by setup_frame, which again causes sigreturn()
|
| 310 |
|
|
* to return -EINTR.
|
| 311 |
|
|
*/
|
| 312 |
|
|
while (1) {
|
| 313 |
|
|
current->state = TASK_INTERRUPTIBLE;
|
| 314 |
|
|
schedule();
|
| 315 |
|
|
/*
|
| 316 |
|
|
* Return -EINTR and set condition code here,
|
| 317 |
|
|
* so the interrupted system call actually returns
|
| 318 |
|
|
* these.
|
| 319 |
|
|
*/
|
| 320 |
|
|
regs->tstate |= (TSTATE_ICARRY|TSTATE_XCARRY);
|
| 321 |
|
|
regs->u_regs[UREG_I0] = EINTR;
|
| 322 |
|
|
if (do_signal(&saveset, regs, 0, 0))
|
| 323 |
|
|
return;
|
| 324 |
|
|
}
|
| 325 |
|
|
}
|
| 326 |
|
|
|
| 327 |
|
|
asmlinkage void do_sigpause(unsigned int set, struct pt_regs *regs)
|
| 328 |
|
|
{
|
| 329 |
|
|
_sigpause_common(set, regs);
|
| 330 |
|
|
}
|
| 331 |
|
|
|
| 332 |
|
|
asmlinkage void do_sigsuspend(struct pt_regs *regs)
|
| 333 |
|
|
{
|
| 334 |
|
|
_sigpause_common(regs->u_regs[UREG_I0], regs);
|
| 335 |
|
|
}
|
| 336 |
|
|
|
| 337 |
|
|
asmlinkage void do_rt_sigsuspend(sigset_t *uset, size_t sigsetsize, struct pt_regs *regs)
|
| 338 |
|
|
{
|
| 339 |
|
|
sigset_t oldset, set;
|
| 340 |
|
|
|
| 341 |
|
|
/* XXX: Don't preclude handling different sized sigset_t's. */
|
| 342 |
|
|
if (sigsetsize != sizeof(sigset_t)) {
|
| 343 |
|
|
regs->tstate |= (TSTATE_ICARRY|TSTATE_XCARRY);
|
| 344 |
|
|
regs->u_regs[UREG_I0] = EINVAL;
|
| 345 |
|
|
return;
|
| 346 |
|
|
}
|
| 347 |
|
|
if (copy_from_user(&set, uset, sizeof(set))) {
|
| 348 |
|
|
regs->tstate |= (TSTATE_ICARRY|TSTATE_XCARRY);
|
| 349 |
|
|
regs->u_regs[UREG_I0] = EFAULT;
|
| 350 |
|
|
return;
|
| 351 |
|
|
}
|
| 352 |
|
|
|
| 353 |
|
|
sigdelsetmask(&set, ~_BLOCKABLE);
|
| 354 |
|
|
spin_lock_irq(¤t->sigmask_lock);
|
| 355 |
|
|
oldset = current->blocked;
|
| 356 |
|
|
current->blocked = set;
|
| 357 |
|
|
recalc_sigpending(current);
|
| 358 |
|
|
spin_unlock_irq(¤t->sigmask_lock);
|
| 359 |
|
|
|
| 360 |
|
|
if ((current->thread.flags & SPARC_FLAG_32BIT) != 0) {
|
| 361 |
|
|
regs->tpc = (regs->tnpc & 0xffffffff);
|
| 362 |
|
|
regs->tnpc = (regs->tnpc + 4) & 0xffffffff;
|
| 363 |
|
|
} else {
|
| 364 |
|
|
regs->tpc = regs->tnpc;
|
| 365 |
|
|
regs->tnpc += 4;
|
| 366 |
|
|
}
|
| 367 |
|
|
|
| 368 |
|
|
/* Condition codes and return value where set here for sigpause,
|
| 369 |
|
|
* and so got used by setup_frame, which again causes sigreturn()
|
| 370 |
|
|
* to return -EINTR.
|
| 371 |
|
|
*/
|
| 372 |
|
|
while (1) {
|
| 373 |
|
|
current->state = TASK_INTERRUPTIBLE;
|
| 374 |
|
|
schedule();
|
| 375 |
|
|
/*
|
| 376 |
|
|
* Return -EINTR and set condition code here,
|
| 377 |
|
|
* so the interrupted system call actually returns
|
| 378 |
|
|
* these.
|
| 379 |
|
|
*/
|
| 380 |
|
|
regs->tstate |= (TSTATE_ICARRY|TSTATE_XCARRY);
|
| 381 |
|
|
regs->u_regs[UREG_I0] = EINTR;
|
| 382 |
|
|
if (do_signal(&oldset, regs, 0, 0))
|
| 383 |
|
|
return;
|
| 384 |
|
|
}
|
| 385 |
|
|
}
|
| 386 |
|
|
|
| 387 |
|
|
static inline int
|
| 388 |
|
|
restore_fpu_state(struct pt_regs *regs, __siginfo_fpu_t *fpu)
|
| 389 |
|
|
{
|
| 390 |
|
|
unsigned long *fpregs = (unsigned long *)(((char *)current) + AOFF_task_fpregs);
|
| 391 |
|
|
unsigned long fprs;
|
| 392 |
|
|
int err;
|
| 393 |
|
|
|
| 394 |
|
|
err = __get_user(fprs, &fpu->si_fprs);
|
| 395 |
|
|
fprs_write(0);
|
| 396 |
|
|
regs->tstate &= ~TSTATE_PEF;
|
| 397 |
|
|
if (fprs & FPRS_DL)
|
| 398 |
|
|
err |= copy_from_user(fpregs, &fpu->si_float_regs[0],
|
| 399 |
|
|
(sizeof(unsigned int) * 32));
|
| 400 |
|
|
if (fprs & FPRS_DU)
|
| 401 |
|
|
err |= copy_from_user(fpregs+16, &fpu->si_float_regs[32],
|
| 402 |
|
|
(sizeof(unsigned int) * 32));
|
| 403 |
|
|
err |= __get_user(current->thread.xfsr[0], &fpu->si_fsr);
|
| 404 |
|
|
err |= __get_user(current->thread.gsr[0], &fpu->si_gsr);
|
| 405 |
|
|
current->thread.fpsaved[0] |= fprs;
|
| 406 |
|
|
return err;
|
| 407 |
|
|
}
|
| 408 |
|
|
|
| 409 |
|
|
void do_rt_sigreturn(struct pt_regs *regs)
|
| 410 |
|
|
{
|
| 411 |
|
|
struct rt_signal_frame *sf;
|
| 412 |
|
|
unsigned long tpc, tnpc, tstate;
|
| 413 |
|
|
__siginfo_fpu_t *fpu_save;
|
| 414 |
|
|
mm_segment_t old_fs;
|
| 415 |
|
|
sigset_t set;
|
| 416 |
|
|
stack_t st;
|
| 417 |
|
|
int err;
|
| 418 |
|
|
|
| 419 |
|
|
synchronize_user_stack ();
|
| 420 |
|
|
sf = (struct rt_signal_frame *)
|
| 421 |
|
|
(regs->u_regs [UREG_FP] + STACK_BIAS);
|
| 422 |
|
|
|
| 423 |
|
|
/* 1. Make sure we are not getting garbage from the user */
|
| 424 |
|
|
if (((unsigned long) sf) & 3)
|
| 425 |
|
|
goto segv;
|
| 426 |
|
|
|
| 427 |
|
|
err = get_user(tpc, &sf->regs.tpc);
|
| 428 |
|
|
err |= __get_user(tnpc, &sf->regs.tnpc);
|
| 429 |
|
|
if ((current->thread.flags & SPARC_FLAG_32BIT) != 0) {
|
| 430 |
|
|
tpc &= 0xffffffff;
|
| 431 |
|
|
tnpc &= 0xffffffff;
|
| 432 |
|
|
}
|
| 433 |
|
|
err |= ((tpc | tnpc) & 3);
|
| 434 |
|
|
|
| 435 |
|
|
/* 2. Restore the state */
|
| 436 |
|
|
err |= __get_user(regs->y, &sf->regs.y);
|
| 437 |
|
|
err |= __get_user(tstate, &sf->regs.tstate);
|
| 438 |
|
|
err |= copy_from_user(regs->u_regs, sf->regs.u_regs, sizeof(regs->u_regs));
|
| 439 |
|
|
|
| 440 |
|
|
/* User can only change condition codes in %tstate. */
|
| 441 |
|
|
regs->tstate &= ~(TSTATE_ICC | TSTATE_XCC);
|
| 442 |
|
|
regs->tstate |= (tstate & (TSTATE_ICC | TSTATE_XCC));
|
| 443 |
|
|
|
| 444 |
|
|
err |= __get_user(fpu_save, &sf->fpu_save);
|
| 445 |
|
|
if (fpu_save)
|
| 446 |
|
|
err |= restore_fpu_state(regs, &sf->fpu_state);
|
| 447 |
|
|
|
| 448 |
|
|
err |= __copy_from_user(&set, &sf->mask, sizeof(sigset_t));
|
| 449 |
|
|
err |= __copy_from_user(&st, &sf->stack, sizeof(stack_t));
|
| 450 |
|
|
|
| 451 |
|
|
if (err)
|
| 452 |
|
|
goto segv;
|
| 453 |
|
|
|
| 454 |
|
|
regs->tpc = tpc;
|
| 455 |
|
|
regs->tnpc = tnpc;
|
| 456 |
|
|
|
| 457 |
|
|
/* It is more difficult to avoid calling this function than to
|
| 458 |
|
|
call it and ignore errors. */
|
| 459 |
|
|
old_fs = get_fs();
|
| 460 |
|
|
set_fs(KERNEL_DS);
|
| 461 |
|
|
do_sigaltstack(&st, NULL, (unsigned long)sf);
|
| 462 |
|
|
set_fs(old_fs);
|
| 463 |
|
|
|
| 464 |
|
|
sigdelsetmask(&set, ~_BLOCKABLE);
|
| 465 |
|
|
spin_lock_irq(¤t->sigmask_lock);
|
| 466 |
|
|
current->blocked = set;
|
| 467 |
|
|
recalc_sigpending(current);
|
| 468 |
|
|
spin_unlock_irq(¤t->sigmask_lock);
|
| 469 |
|
|
return;
|
| 470 |
|
|
segv:
|
| 471 |
|
|
send_sig(SIGSEGV, current, 1);
|
| 472 |
|
|
}
|
| 473 |
|
|
|
| 474 |
|
|
/* Checks if the fp is valid */
|
| 475 |
|
|
static int invalid_frame_pointer(void *fp, int fplen)
|
| 476 |
|
|
{
|
| 477 |
|
|
if (((unsigned long) fp) & 7)
|
| 478 |
|
|
return 1;
|
| 479 |
|
|
return 0;
|
| 480 |
|
|
}
|
| 481 |
|
|
|
| 482 |
|
|
static inline int
|
| 483 |
|
|
save_fpu_state(struct pt_regs *regs, __siginfo_fpu_t *fpu)
|
| 484 |
|
|
{
|
| 485 |
|
|
unsigned long *fpregs = (unsigned long *)(regs+1);
|
| 486 |
|
|
unsigned long fprs;
|
| 487 |
|
|
int err = 0;
|
| 488 |
|
|
|
| 489 |
|
|
fprs = current->thread.fpsaved[0];
|
| 490 |
|
|
if (fprs & FPRS_DL)
|
| 491 |
|
|
err |= copy_to_user(&fpu->si_float_regs[0], fpregs,
|
| 492 |
|
|
(sizeof(unsigned int) * 32));
|
| 493 |
|
|
if (fprs & FPRS_DU)
|
| 494 |
|
|
err |= copy_to_user(&fpu->si_float_regs[32], fpregs+16,
|
| 495 |
|
|
(sizeof(unsigned int) * 32));
|
| 496 |
|
|
err |= __put_user(current->thread.xfsr[0], &fpu->si_fsr);
|
| 497 |
|
|
err |= __put_user(current->thread.gsr[0], &fpu->si_gsr);
|
| 498 |
|
|
err |= __put_user(fprs, &fpu->si_fprs);
|
| 499 |
|
|
|
| 500 |
|
|
return err;
|
| 501 |
|
|
}
|
| 502 |
|
|
|
| 503 |
|
|
static inline void *get_sigframe(struct k_sigaction *ka, struct pt_regs *regs, unsigned long framesize)
|
| 504 |
|
|
{
|
| 505 |
|
|
unsigned long sp;
|
| 506 |
|
|
|
| 507 |
|
|
sp = regs->u_regs[UREG_FP] + STACK_BIAS;
|
| 508 |
|
|
|
| 509 |
|
|
/* This is the X/Open sanctioned signal stack switching. */
|
| 510 |
|
|
if (ka->sa.sa_flags & SA_ONSTACK) {
|
| 511 |
|
|
if (!on_sig_stack(sp) &&
|
| 512 |
|
|
!((current->sas_ss_sp + current->sas_ss_size) & 7))
|
| 513 |
|
|
sp = current->sas_ss_sp + current->sas_ss_size;
|
| 514 |
|
|
}
|
| 515 |
|
|
return (void *)(sp - framesize);
|
| 516 |
|
|
}
|
| 517 |
|
|
|
| 518 |
|
|
static inline void
|
| 519 |
|
|
setup_rt_frame(struct k_sigaction *ka, struct pt_regs *regs,
|
| 520 |
|
|
int signo, sigset_t *oldset, siginfo_t *info)
|
| 521 |
|
|
{
|
| 522 |
|
|
struct rt_signal_frame *sf;
|
| 523 |
|
|
int sigframe_size, err;
|
| 524 |
|
|
|
| 525 |
|
|
/* 1. Make sure everything is clean */
|
| 526 |
|
|
synchronize_user_stack();
|
| 527 |
|
|
save_and_clear_fpu();
|
| 528 |
|
|
|
| 529 |
|
|
sigframe_size = RT_ALIGNEDSZ;
|
| 530 |
|
|
if (!(current->thread.fpsaved[0] & FPRS_FEF))
|
| 531 |
|
|
sigframe_size -= sizeof(__siginfo_fpu_t);
|
| 532 |
|
|
|
| 533 |
|
|
sf = (struct rt_signal_frame *)get_sigframe(ka, regs, sigframe_size);
|
| 534 |
|
|
|
| 535 |
|
|
if (invalid_frame_pointer (sf, sigframe_size))
|
| 536 |
|
|
goto sigill;
|
| 537 |
|
|
|
| 538 |
|
|
if (current->thread.w_saved != 0) {
|
| 539 |
|
|
#ifdef DEBUG_SIGNALS
|
| 540 |
|
|
printk ("%s[%d]: Invalid user stack frame for "
|
| 541 |
|
|
"signal delivery.\n", current->comm, current->pid);
|
| 542 |
|
|
#endif
|
| 543 |
|
|
goto sigill;
|
| 544 |
|
|
}
|
| 545 |
|
|
|
| 546 |
|
|
/* 2. Save the current process state */
|
| 547 |
|
|
err = copy_to_user(&sf->regs, regs, sizeof (*regs));
|
| 548 |
|
|
|
| 549 |
|
|
if (current->thread.fpsaved[0] & FPRS_FEF) {
|
| 550 |
|
|
err |= save_fpu_state(regs, &sf->fpu_state);
|
| 551 |
|
|
err |= __put_user((u64)&sf->fpu_state, &sf->fpu_save);
|
| 552 |
|
|
} else {
|
| 553 |
|
|
err |= __put_user(0, &sf->fpu_save);
|
| 554 |
|
|
}
|
| 555 |
|
|
|
| 556 |
|
|
/* Setup sigaltstack */
|
| 557 |
|
|
err |= __put_user(current->sas_ss_sp, &sf->stack.ss_sp);
|
| 558 |
|
|
err |= __put_user(sas_ss_flags(regs->u_regs[UREG_FP]), &sf->stack.ss_flags);
|
| 559 |
|
|
err |= __put_user(current->sas_ss_size, &sf->stack.ss_size);
|
| 560 |
|
|
|
| 561 |
|
|
err |= copy_to_user(&sf->mask, oldset, sizeof(sigset_t));
|
| 562 |
|
|
|
| 563 |
|
|
err |= copy_in_user((u64 *)sf,
|
| 564 |
|
|
(u64 *)(regs->u_regs[UREG_FP]+STACK_BIAS),
|
| 565 |
|
|
sizeof(struct reg_window));
|
| 566 |
|
|
|
| 567 |
|
|
if (info)
|
| 568 |
|
|
err |= copy_siginfo_to_user(&sf->info, info);
|
| 569 |
|
|
else {
|
| 570 |
|
|
err |= __put_user(signo, &sf->info.si_signo);
|
| 571 |
|
|
err |= __put_user(SI_NOINFO, &sf->info.si_code);
|
| 572 |
|
|
}
|
| 573 |
|
|
if (err)
|
| 574 |
|
|
goto sigsegv;
|
| 575 |
|
|
|
| 576 |
|
|
/* 3. signal handler back-trampoline and parameters */
|
| 577 |
|
|
regs->u_regs[UREG_FP] = ((unsigned long) sf) - STACK_BIAS;
|
| 578 |
|
|
regs->u_regs[UREG_I0] = signo;
|
| 579 |
|
|
regs->u_regs[UREG_I1] = (unsigned long) &sf->info;
|
| 580 |
|
|
|
| 581 |
|
|
/* The sigcontext is passed in this way because of how it
|
| 582 |
|
|
* is defined in GLIBC's /usr/include/bits/sigcontext.h
|
| 583 |
|
|
* for sparc64. It includes the 128 bytes of siginfo_t.
|
| 584 |
|
|
*/
|
| 585 |
|
|
regs->u_regs[UREG_I2] = (unsigned long) &sf->info;
|
| 586 |
|
|
|
| 587 |
|
|
/* 5. signal handler */
|
| 588 |
|
|
regs->tpc = (unsigned long) ka->sa.sa_handler;
|
| 589 |
|
|
regs->tnpc = (regs->tpc + 4);
|
| 590 |
|
|
if ((current->thread.flags & SPARC_FLAG_32BIT) != 0) {
|
| 591 |
|
|
regs->tpc &= 0xffffffff;
|
| 592 |
|
|
regs->tnpc &= 0xffffffff;
|
| 593 |
|
|
}
|
| 594 |
|
|
/* 4. return to kernel instructions */
|
| 595 |
|
|
regs->u_regs[UREG_I7] = (unsigned long)ka->ka_restorer;
|
| 596 |
|
|
return;
|
| 597 |
|
|
|
| 598 |
|
|
sigill:
|
| 599 |
|
|
do_exit(SIGILL);
|
| 600 |
|
|
sigsegv:
|
| 601 |
|
|
do_exit(SIGSEGV);
|
| 602 |
|
|
}
|
| 603 |
|
|
|
| 604 |
|
|
static inline void handle_signal(unsigned long signr, struct k_sigaction *ka,
|
| 605 |
|
|
siginfo_t *info,
|
| 606 |
|
|
sigset_t *oldset, struct pt_regs *regs)
|
| 607 |
|
|
{
|
| 608 |
|
|
setup_rt_frame(ka, regs, signr, oldset, (ka->sa.sa_flags & SA_SIGINFO) ? info : NULL);
|
| 609 |
|
|
if(ka->sa.sa_flags & SA_ONESHOT)
|
| 610 |
|
|
ka->sa.sa_handler = SIG_DFL;
|
| 611 |
|
|
if(!(ka->sa.sa_flags & SA_NOMASK)) {
|
| 612 |
|
|
spin_lock_irq(¤t->sigmask_lock);
|
| 613 |
|
|
sigorsets(¤t->blocked,¤t->blocked,&ka->sa.sa_mask);
|
| 614 |
|
|
sigaddset(¤t->blocked,signr);
|
| 615 |
|
|
recalc_sigpending(current);
|
| 616 |
|
|
spin_unlock_irq(¤t->sigmask_lock);
|
| 617 |
|
|
}
|
| 618 |
|
|
}
|
| 619 |
|
|
|
| 620 |
|
|
static inline void syscall_restart(unsigned long orig_i0, struct pt_regs *regs,
|
| 621 |
|
|
struct sigaction *sa)
|
| 622 |
|
|
{
|
| 623 |
|
|
switch(regs->u_regs[UREG_I0]) {
|
| 624 |
|
|
case ERESTARTNOHAND:
|
| 625 |
|
|
no_system_call_restart:
|
| 626 |
|
|
regs->u_regs[UREG_I0] = EINTR;
|
| 627 |
|
|
regs->tstate |= (TSTATE_ICARRY|TSTATE_XCARRY);
|
| 628 |
|
|
break;
|
| 629 |
|
|
case ERESTARTSYS:
|
| 630 |
|
|
if(!(sa->sa_flags & SA_RESTART))
|
| 631 |
|
|
goto no_system_call_restart;
|
| 632 |
|
|
/* fallthrough */
|
| 633 |
|
|
case ERESTARTNOINTR:
|
| 634 |
|
|
regs->u_regs[UREG_I0] = orig_i0;
|
| 635 |
|
|
regs->tpc -= 4;
|
| 636 |
|
|
regs->tnpc -= 4;
|
| 637 |
|
|
}
|
| 638 |
|
|
}
|
| 639 |
|
|
|
| 640 |
|
|
#ifdef DEBUG_SIGNALS_MAPS
|
| 641 |
|
|
|
| 642 |
|
|
#define MAPS_LINE_FORMAT "%016lx-%016lx %s %016lx %s %lu "
|
| 643 |
|
|
|
| 644 |
|
|
static inline void read_maps (void)
|
| 645 |
|
|
{
|
| 646 |
|
|
struct vm_area_struct * map, * next;
|
| 647 |
|
|
char * buffer;
|
| 648 |
|
|
ssize_t i;
|
| 649 |
|
|
|
| 650 |
|
|
buffer = (char*)__get_free_page(GFP_KERNEL);
|
| 651 |
|
|
if (!buffer)
|
| 652 |
|
|
return;
|
| 653 |
|
|
|
| 654 |
|
|
for (map = current->mm->mmap ; map ; map = next ) {
|
| 655 |
|
|
/* produce the next line */
|
| 656 |
|
|
char *line;
|
| 657 |
|
|
char str[5], *cp = str;
|
| 658 |
|
|
int flags;
|
| 659 |
|
|
kdev_t dev;
|
| 660 |
|
|
unsigned long ino;
|
| 661 |
|
|
|
| 662 |
|
|
/*
|
| 663 |
|
|
* Get the next vma now (but it won't be used if we sleep).
|
| 664 |
|
|
*/
|
| 665 |
|
|
next = map->vm_next;
|
| 666 |
|
|
flags = map->vm_flags;
|
| 667 |
|
|
|
| 668 |
|
|
*cp++ = flags & VM_READ ? 'r' : '-';
|
| 669 |
|
|
*cp++ = flags & VM_WRITE ? 'w' : '-';
|
| 670 |
|
|
*cp++ = flags & VM_EXEC ? 'x' : '-';
|
| 671 |
|
|
*cp++ = flags & VM_MAYSHARE ? 's' : 'p';
|
| 672 |
|
|
*cp++ = 0;
|
| 673 |
|
|
|
| 674 |
|
|
dev = 0;
|
| 675 |
|
|
ino = 0;
|
| 676 |
|
|
if (map->vm_file != NULL) {
|
| 677 |
|
|
dev = map->vm_file->f_dentry->d_inode->i_dev;
|
| 678 |
|
|
ino = map->vm_file->f_dentry->d_inode->i_ino;
|
| 679 |
|
|
line = d_path(map->vm_file->f_dentry,
|
| 680 |
|
|
map->vm_file->f_vfsmnt,
|
| 681 |
|
|
buffer, PAGE_SIZE);
|
| 682 |
|
|
if (IS_ERR(line))
|
| 683 |
|
|
break;
|
| 684 |
|
|
}
|
| 685 |
|
|
printk(MAPS_LINE_FORMAT, map->vm_start, map->vm_end, str, map->vm_pgoff << PAGE_SHIFT,
|
| 686 |
|
|
kdevname(dev), ino);
|
| 687 |
|
|
if (map->vm_file != NULL)
|
| 688 |
|
|
printk("%s\n", line);
|
| 689 |
|
|
else
|
| 690 |
|
|
printk("\n");
|
| 691 |
|
|
}
|
| 692 |
|
|
free_page((unsigned long)buffer);
|
| 693 |
|
|
return;
|
| 694 |
|
|
}
|
| 695 |
|
|
|
| 696 |
|
|
#endif
|
| 697 |
|
|
|
| 698 |
|
|
/* Note that 'init' is a special process: it doesn't get signals it doesn't
|
| 699 |
|
|
* want to handle. Thus you cannot kill init even with a SIGKILL even by
|
| 700 |
|
|
* mistake.
|
| 701 |
|
|
*/
|
| 702 |
|
|
asmlinkage int do_signal(sigset_t *oldset, struct pt_regs * regs,
|
| 703 |
|
|
unsigned long orig_i0, int restart_syscall)
|
| 704 |
|
|
{
|
| 705 |
|
|
unsigned long signr;
|
| 706 |
|
|
siginfo_t info;
|
| 707 |
|
|
struct k_sigaction *ka;
|
| 708 |
|
|
|
| 709 |
|
|
if (!oldset)
|
| 710 |
|
|
oldset = ¤t->blocked;
|
| 711 |
|
|
|
| 712 |
|
|
#ifdef CONFIG_SPARC32_COMPAT
|
| 713 |
|
|
if (current->thread.flags & SPARC_FLAG_32BIT) {
|
| 714 |
|
|
extern asmlinkage int do_signal32(sigset_t *, struct pt_regs *,
|
| 715 |
|
|
unsigned long, int);
|
| 716 |
|
|
return do_signal32(oldset, regs, orig_i0, restart_syscall);
|
| 717 |
|
|
}
|
| 718 |
|
|
#endif
|
| 719 |
|
|
for (;;) {
|
| 720 |
|
|
spin_lock_irq(¤t->sigmask_lock);
|
| 721 |
|
|
signr = dequeue_signal(¤t->blocked, &info);
|
| 722 |
|
|
spin_unlock_irq(¤t->sigmask_lock);
|
| 723 |
|
|
|
| 724 |
|
|
if (!signr)
|
| 725 |
|
|
break;
|
| 726 |
|
|
|
| 727 |
|
|
if ((current->ptrace & PT_PTRACED) && signr != SIGKILL) {
|
| 728 |
|
|
/* Do the syscall restart before we let the debugger
|
| 729 |
|
|
* look at the child registers.
|
| 730 |
|
|
*/
|
| 731 |
|
|
if (restart_syscall &&
|
| 732 |
|
|
(regs->u_regs[UREG_I0] == ERESTARTNOHAND ||
|
| 733 |
|
|
regs->u_regs[UREG_I0] == ERESTARTSYS ||
|
| 734 |
|
|
regs->u_regs[UREG_I0] == ERESTARTNOINTR)) {
|
| 735 |
|
|
regs->u_regs[UREG_I0] = orig_i0;
|
| 736 |
|
|
regs->tpc -= 4;
|
| 737 |
|
|
regs->tnpc -= 4;
|
| 738 |
|
|
restart_syscall = 0;
|
| 739 |
|
|
}
|
| 740 |
|
|
|
| 741 |
|
|
current->exit_code = signr;
|
| 742 |
|
|
current->state = TASK_STOPPED;
|
| 743 |
|
|
notify_parent(current, SIGCHLD);
|
| 744 |
|
|
schedule();
|
| 745 |
|
|
if (!(signr = current->exit_code))
|
| 746 |
|
|
continue;
|
| 747 |
|
|
current->exit_code = 0;
|
| 748 |
|
|
if (signr == SIGSTOP)
|
| 749 |
|
|
continue;
|
| 750 |
|
|
|
| 751 |
|
|
/* Update the siginfo structure. Is this good? */
|
| 752 |
|
|
if (signr != info.si_signo) {
|
| 753 |
|
|
info.si_signo = signr;
|
| 754 |
|
|
info.si_errno = 0;
|
| 755 |
|
|
info.si_code = SI_USER;
|
| 756 |
|
|
info.si_pid = current->p_pptr->pid;
|
| 757 |
|
|
info.si_uid = current->p_pptr->uid;
|
| 758 |
|
|
}
|
| 759 |
|
|
|
| 760 |
|
|
/* If the (new) signal is now blocked, requeue it. */
|
| 761 |
|
|
if (sigismember(¤t->blocked, signr)) {
|
| 762 |
|
|
send_sig_info(signr, &info, current);
|
| 763 |
|
|
continue;
|
| 764 |
|
|
}
|
| 765 |
|
|
}
|
| 766 |
|
|
|
| 767 |
|
|
ka = ¤t->sig->action[signr-1];
|
| 768 |
|
|
|
| 769 |
|
|
if (ka->sa.sa_handler == SIG_IGN) {
|
| 770 |
|
|
if (signr != SIGCHLD)
|
| 771 |
|
|
continue;
|
| 772 |
|
|
|
| 773 |
|
|
/* sys_wait4() grabs the master kernel lock, so
|
| 774 |
|
|
* we need not do so, that sucker should be
|
| 775 |
|
|
* threaded and would not be that difficult to
|
| 776 |
|
|
* do anyways.
|
| 777 |
|
|
*/
|
| 778 |
|
|
while (sys_wait4(-1, NULL, WNOHANG, NULL) > 0)
|
| 779 |
|
|
;
|
| 780 |
|
|
continue;
|
| 781 |
|
|
}
|
| 782 |
|
|
if (ka->sa.sa_handler == SIG_DFL) {
|
| 783 |
|
|
unsigned long exit_code = signr;
|
| 784 |
|
|
|
| 785 |
|
|
if (current->pid == 1)
|
| 786 |
|
|
continue;
|
| 787 |
|
|
switch (signr) {
|
| 788 |
|
|
case SIGCONT: case SIGCHLD: case SIGWINCH: case SIGURG:
|
| 789 |
|
|
continue;
|
| 790 |
|
|
|
| 791 |
|
|
case SIGTSTP: case SIGTTIN: case SIGTTOU:
|
| 792 |
|
|
if (is_orphaned_pgrp(current->pgrp))
|
| 793 |
|
|
continue;
|
| 794 |
|
|
|
| 795 |
|
|
case SIGSTOP:
|
| 796 |
|
|
if (current->ptrace & PT_PTRACED)
|
| 797 |
|
|
continue;
|
| 798 |
|
|
current->state = TASK_STOPPED;
|
| 799 |
|
|
current->exit_code = signr;
|
| 800 |
|
|
if (!(current->p_pptr->sig->action[SIGCHLD-1].sa.sa_flags &
|
| 801 |
|
|
SA_NOCLDSTOP))
|
| 802 |
|
|
notify_parent(current, SIGCHLD);
|
| 803 |
|
|
schedule();
|
| 804 |
|
|
continue;
|
| 805 |
|
|
|
| 806 |
|
|
case SIGQUIT: case SIGILL: case SIGTRAP:
|
| 807 |
|
|
case SIGABRT: case SIGFPE: case SIGSEGV:
|
| 808 |
|
|
case SIGBUS: case SIGSYS: case SIGXCPU: case SIGXFSZ:
|
| 809 |
|
|
if (do_coredump(signr, regs))
|
| 810 |
|
|
exit_code |= 0x80;
|
| 811 |
|
|
#ifdef DEBUG_SIGNALS
|
| 812 |
|
|
/* Very useful to debug the dynamic linker */
|
| 813 |
|
|
printk ("Sig %d going...\n", (int)signr);
|
| 814 |
|
|
show_regs (regs);
|
| 815 |
|
|
#ifdef DEBUG_SIGNALS_TRACE
|
| 816 |
|
|
{
|
| 817 |
|
|
struct reg_window *rw = (struct reg_window *)(regs->u_regs[UREG_FP] + STACK_BIAS);
|
| 818 |
|
|
unsigned long ins[8];
|
| 819 |
|
|
|
| 820 |
|
|
while (rw &&
|
| 821 |
|
|
!(((unsigned long) rw) & 0x3)) {
|
| 822 |
|
|
copy_from_user(ins, &rw->ins[0], sizeof(ins));
|
| 823 |
|
|
printk("Caller[%016lx](%016lx,%016lx,%016lx,%016lx,%016lx,%016lx)\n", ins[7], ins[0], ins[1], ins[2], ins[3], ins[4], ins[5]);
|
| 824 |
|
|
rw = (struct reg_window *)(unsigned long)(ins[6] + STACK_BIAS);
|
| 825 |
|
|
}
|
| 826 |
|
|
}
|
| 827 |
|
|
#endif
|
| 828 |
|
|
#ifdef DEBUG_SIGNALS_MAPS
|
| 829 |
|
|
printk("Maps:\n");
|
| 830 |
|
|
read_maps();
|
| 831 |
|
|
#endif
|
| 832 |
|
|
#endif
|
| 833 |
|
|
/* fall through */
|
| 834 |
|
|
default:
|
| 835 |
|
|
sig_exit(signr, exit_code, &info);
|
| 836 |
|
|
/* NOT REACHED */
|
| 837 |
|
|
}
|
| 838 |
|
|
}
|
| 839 |
|
|
if (restart_syscall)
|
| 840 |
|
|
syscall_restart(orig_i0, regs, &ka->sa);
|
| 841 |
|
|
handle_signal(signr, ka, &info, oldset, regs);
|
| 842 |
|
|
return 1;
|
| 843 |
|
|
}
|
| 844 |
|
|
if (restart_syscall &&
|
| 845 |
|
|
(regs->u_regs[UREG_I0] == ERESTARTNOHAND ||
|
| 846 |
|
|
regs->u_regs[UREG_I0] == ERESTARTSYS ||
|
| 847 |
|
|
regs->u_regs[UREG_I0] == ERESTARTNOINTR)) {
|
| 848 |
|
|
/* replay the system call when we are done */
|
| 849 |
|
|
regs->u_regs[UREG_I0] = orig_i0;
|
| 850 |
|
|
regs->tpc -= 4;
|
| 851 |
|
|
regs->tnpc -= 4;
|
| 852 |
|
|
}
|
| 853 |
|
|
return 0;
|
| 854 |
|
|
}
|
