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1275 |
phoenix |
/* $Id: signal32.c,v 1.1.1.1 2004-04-15 01:34:45 phoenix Exp $
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* arch/sparc64/kernel/signal32.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/sched.h>
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#include <linux/kernel.h>
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#include <linux/signal.h>
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#include <linux/errno.h>
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#include <linux/wait.h>
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#include <linux/ptrace.h>
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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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#include <asm/uaccess.h>
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#include <asm/bitops.h>
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#include <asm/ptrace.h>
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#include <asm/svr4.h>
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#include <asm/pgtable.h>
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#include <asm/psrcompat.h>
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#include <asm/fpumacro.h>
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#include <asm/visasm.h>
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#define _BLOCKABLE (~(sigmask(SIGKILL) | sigmask(SIGSTOP)))
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| 32 |
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asmlinkage int do_signal32(sigset_t *oldset, struct pt_regs *regs,
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unsigned long orig_o0, int ret_from_syscall);
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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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/* #define DEBUG_SIGNALS_TLB 1 */
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| 41 |
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/* Signal frames: the original one (compatible with SunOS):
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*
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* Set up a signal frame... Make the stack look the way SunOS
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* expects it to look which is basically:
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*
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* ---------------------------------- <-- %sp at signal time
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* Struct sigcontext
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* Signal address
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* Ptr to sigcontext area above
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* Signal code
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* The signal number itself
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* One register window
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* ---------------------------------- <-- New %sp
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*/
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struct signal_sframe32 {
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struct reg_window32 sig_window;
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int sig_num;
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int sig_code;
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/* struct sigcontext32 * */ u32 sig_scptr;
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int sig_address;
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struct sigcontext32 sig_context;
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unsigned extramask[_NSIG_WORDS32 - 1];
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};
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| 64 |
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/*
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* And the new one, intended to be used for Linux applications only
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* (we have enough in there to work with clone).
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* All the interesting bits are in the info field.
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*/
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struct new_signal_frame32 {
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struct sparc_stackf32 ss;
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__siginfo32_t info;
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/* __siginfo_fpu32_t * */ u32 fpu_save;
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unsigned int insns [2];
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unsigned extramask[_NSIG_WORDS32 - 1];
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unsigned extra_size; /* Should be sizeof(siginfo_extra_v8plus_t) */
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/* Only valid if (info.si_regs.psr & (PSR_VERS|PSR_IMPL)) == PSR_V8PLUS */
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siginfo_extra_v8plus_t v8plus;
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__siginfo_fpu_t fpu_state;
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};
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| 82 |
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struct rt_signal_frame32 {
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struct sparc_stackf32 ss;
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siginfo_t32 info;
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struct pt_regs32 regs;
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sigset_t32 mask;
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| 87 |
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/* __siginfo_fpu32_t * */ u32 fpu_save;
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unsigned int insns [2];
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stack_t32 stack;
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| 90 |
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unsigned extra_size; /* Should be sizeof(siginfo_extra_v8plus_t) */
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/* Only valid if (regs.psr & (PSR_VERS|PSR_IMPL)) == PSR_V8PLUS */
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siginfo_extra_v8plus_t v8plus;
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__siginfo_fpu_t fpu_state;
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| 94 |
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};
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| 96 |
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/* Align macros */
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#define SF_ALIGNEDSZ (((sizeof(struct signal_sframe32) + 7) & (~7)))
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#define NF_ALIGNEDSZ (((sizeof(struct new_signal_frame32) + 7) & (~7)))
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#define RT_ALIGNEDSZ (((sizeof(struct rt_signal_frame32) + 7) & (~7)))
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| 101 |
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int copy_siginfo_to_user32(siginfo_t32 *to, siginfo_t *from)
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| 102 |
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{
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| 103 |
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int err;
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| 104 |
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| 105 |
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if (!access_ok (VERIFY_WRITE, to, sizeof(siginfo_t32)))
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| 106 |
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return -EFAULT;
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| 108 |
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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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This routine must convert siginfo from 64bit to 32bit as well
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at the same time. */
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| 115 |
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err = __put_user(from->si_signo, &to->si_signo);
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err |= __put_user(from->si_errno, &to->si_errno);
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err |= __put_user((short)from->si_code, &to->si_code);
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| 118 |
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if (from->si_code < 0)
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| 119 |
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err |= __copy_to_user(&to->_sifields._pad, &from->_sifields._pad, SI_PAD_SIZE);
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| 120 |
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else {
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| 121 |
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switch (from->si_code >> 16) {
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| 122 |
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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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err |= __put_user(from->si_status, &to->si_status);
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default:
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| 127 |
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err |= __put_user(from->si_pid, &to->si_pid);
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| 128 |
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err |= __put_user(from->si_uid, &to->si_uid);
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| 129 |
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break;
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| 130 |
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case __SI_FAULT >> 16:
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| 131 |
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case __SI_POLL >> 16:
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| 132 |
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err |= __put_user(from->si_trapno, &to->si_trapno);
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| 133 |
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err |= __put_user((long)from->si_addr, &to->si_addr);
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| 134 |
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break;
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| 135 |
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/* case __SI_RT: This is not generated by the kernel as of now. */
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| 136 |
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}
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| 137 |
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}
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| 138 |
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return err;
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| 139 |
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}
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| 140 |
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| 141 |
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/*
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| 142 |
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* atomically swap in the new signal mask, and wait for a signal.
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| 143 |
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* This is really tricky on the Sparc, watch out...
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| 144 |
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*/
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| 145 |
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asmlinkage void _sigpause32_common(old_sigset_t32 set, struct pt_regs *regs)
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| 146 |
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{
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| 147 |
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sigset_t saveset;
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| 148 |
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| 149 |
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set &= _BLOCKABLE;
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| 150 |
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spin_lock_irq(¤t->sigmask_lock);
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| 151 |
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saveset = current->blocked;
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siginitset(¤t->blocked, set);
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recalc_sigpending(current);
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| 154 |
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spin_unlock_irq(¤t->sigmask_lock);
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| 155 |
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| 156 |
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regs->tpc = regs->tnpc;
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| 157 |
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regs->tnpc += 4;
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| 158 |
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if ((current->thread.flags & SPARC_FLAG_32BIT) != 0) {
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| 159 |
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regs->tpc &= 0xffffffff;
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regs->tnpc &= 0xffffffff;
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| 161 |
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}
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| 162 |
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| 163 |
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/* Condition codes and return value where set here for sigpause,
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| 164 |
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* and so got used by setup_frame, which again causes sigreturn()
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| 165 |
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* to return -EINTR.
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| 166 |
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*/
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| 167 |
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while (1) {
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| 168 |
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current->state = TASK_INTERRUPTIBLE;
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| 169 |
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schedule();
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| 170 |
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/*
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| 171 |
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* Return -EINTR and set condition code here,
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| 172 |
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* so the interrupted system call actually returns
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| 173 |
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* these.
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| 174 |
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*/
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| 175 |
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regs->tstate |= TSTATE_ICARRY;
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| 176 |
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regs->u_regs[UREG_I0] = EINTR;
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| 177 |
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if (do_signal32(&saveset, regs, 0, 0))
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| 178 |
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return;
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| 179 |
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}
|
| 180 |
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}
|
| 181 |
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| 182 |
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asmlinkage void do_rt_sigsuspend32(u32 uset, size_t sigsetsize, struct pt_regs *regs)
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| 183 |
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{
|
| 184 |
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sigset_t oldset, set;
|
| 185 |
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sigset_t32 set32;
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| 186 |
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| 187 |
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/* XXX: Don't preclude handling different sized sigset_t's. */
|
| 188 |
|
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if (((__kernel_size_t32)sigsetsize) != sizeof(sigset_t)) {
|
| 189 |
|
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regs->tstate |= TSTATE_ICARRY;
|
| 190 |
|
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regs->u_regs[UREG_I0] = EINVAL;
|
| 191 |
|
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return;
|
| 192 |
|
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}
|
| 193 |
|
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if (copy_from_user(&set32, (void *)(long)uset, sizeof(set32))) {
|
| 194 |
|
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regs->tstate |= TSTATE_ICARRY;
|
| 195 |
|
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regs->u_regs[UREG_I0] = EFAULT;
|
| 196 |
|
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return;
|
| 197 |
|
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}
|
| 198 |
|
|
switch (_NSIG_WORDS) {
|
| 199 |
|
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case 4: set.sig[3] = set32.sig[6] + (((long)set32.sig[7]) << 32);
|
| 200 |
|
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case 3: set.sig[2] = set32.sig[4] + (((long)set32.sig[5]) << 32);
|
| 201 |
|
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case 2: set.sig[1] = set32.sig[2] + (((long)set32.sig[3]) << 32);
|
| 202 |
|
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case 1: set.sig[0] = set32.sig[0] + (((long)set32.sig[1]) << 32);
|
| 203 |
|
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}
|
| 204 |
|
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sigdelsetmask(&set, ~_BLOCKABLE);
|
| 205 |
|
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spin_lock_irq(¤t->sigmask_lock);
|
| 206 |
|
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oldset = current->blocked;
|
| 207 |
|
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current->blocked = set;
|
| 208 |
|
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recalc_sigpending(current);
|
| 209 |
|
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spin_unlock_irq(¤t->sigmask_lock);
|
| 210 |
|
|
|
| 211 |
|
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regs->tpc = regs->tnpc;
|
| 212 |
|
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regs->tnpc += 4;
|
| 213 |
|
|
if ((current->thread.flags & SPARC_FLAG_32BIT) != 0) {
|
| 214 |
|
|
regs->tpc &= 0xffffffff;
|
| 215 |
|
|
regs->tnpc &= 0xffffffff;
|
| 216 |
|
|
}
|
| 217 |
|
|
|
| 218 |
|
|
/* Condition codes and return value where set here for sigpause,
|
| 219 |
|
|
* and so got used by setup_frame, which again causes sigreturn()
|
| 220 |
|
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* to return -EINTR.
|
| 221 |
|
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*/
|
| 222 |
|
|
while (1) {
|
| 223 |
|
|
current->state = TASK_INTERRUPTIBLE;
|
| 224 |
|
|
schedule();
|
| 225 |
|
|
/*
|
| 226 |
|
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* Return -EINTR and set condition code here,
|
| 227 |
|
|
* so the interrupted system call actually returns
|
| 228 |
|
|
* these.
|
| 229 |
|
|
*/
|
| 230 |
|
|
regs->tstate |= TSTATE_ICARRY;
|
| 231 |
|
|
regs->u_regs[UREG_I0] = EINTR;
|
| 232 |
|
|
if (do_signal32(&oldset, regs, 0, 0))
|
| 233 |
|
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return;
|
| 234 |
|
|
}
|
| 235 |
|
|
}
|
| 236 |
|
|
|
| 237 |
|
|
static inline int restore_fpu_state32(struct pt_regs *regs, __siginfo_fpu_t *fpu)
|
| 238 |
|
|
{
|
| 239 |
|
|
unsigned long *fpregs = (unsigned long *)(((char *)current) + AOFF_task_fpregs);
|
| 240 |
|
|
unsigned long fprs;
|
| 241 |
|
|
int err;
|
| 242 |
|
|
|
| 243 |
|
|
err = __get_user(fprs, &fpu->si_fprs);
|
| 244 |
|
|
fprs_write(0);
|
| 245 |
|
|
regs->tstate &= ~TSTATE_PEF;
|
| 246 |
|
|
if (fprs & FPRS_DL)
|
| 247 |
|
|
err |= copy_from_user(fpregs, &fpu->si_float_regs[0], (sizeof(unsigned int) * 32));
|
| 248 |
|
|
if (fprs & FPRS_DU)
|
| 249 |
|
|
err |= copy_from_user(fpregs+16, &fpu->si_float_regs[32], (sizeof(unsigned int) * 32));
|
| 250 |
|
|
err |= __get_user(current->thread.xfsr[0], &fpu->si_fsr);
|
| 251 |
|
|
err |= __get_user(current->thread.gsr[0], &fpu->si_gsr);
|
| 252 |
|
|
current->thread.fpsaved[0] |= fprs;
|
| 253 |
|
|
return err;
|
| 254 |
|
|
}
|
| 255 |
|
|
|
| 256 |
|
|
void do_new_sigreturn32(struct pt_regs *regs)
|
| 257 |
|
|
{
|
| 258 |
|
|
struct new_signal_frame32 *sf;
|
| 259 |
|
|
unsigned int psr;
|
| 260 |
|
|
unsigned pc, npc, fpu_save;
|
| 261 |
|
|
sigset_t set;
|
| 262 |
|
|
unsigned seta[_NSIG_WORDS32];
|
| 263 |
|
|
int err, i;
|
| 264 |
|
|
|
| 265 |
|
|
regs->u_regs[UREG_FP] &= 0x00000000ffffffffUL;
|
| 266 |
|
|
sf = (struct new_signal_frame32 *) regs->u_regs [UREG_FP];
|
| 267 |
|
|
|
| 268 |
|
|
/* 1. Make sure we are not getting garbage from the user */
|
| 269 |
|
|
if (verify_area (VERIFY_READ, sf, sizeof (*sf)) ||
|
| 270 |
|
|
(((unsigned long) sf) & 3))
|
| 271 |
|
|
goto segv;
|
| 272 |
|
|
|
| 273 |
|
|
get_user(pc, &sf->info.si_regs.pc);
|
| 274 |
|
|
__get_user(npc, &sf->info.si_regs.npc);
|
| 275 |
|
|
|
| 276 |
|
|
if ((pc | npc) & 3)
|
| 277 |
|
|
goto segv;
|
| 278 |
|
|
|
| 279 |
|
|
if ((current->thread.flags & SPARC_FLAG_32BIT) != 0) {
|
| 280 |
|
|
pc &= 0xffffffff;
|
| 281 |
|
|
npc &= 0xffffffff;
|
| 282 |
|
|
}
|
| 283 |
|
|
regs->tpc = pc;
|
| 284 |
|
|
regs->tnpc = npc;
|
| 285 |
|
|
|
| 286 |
|
|
/* 2. Restore the state */
|
| 287 |
|
|
err = __get_user(regs->y, &sf->info.si_regs.y);
|
| 288 |
|
|
err |= __get_user(psr, &sf->info.si_regs.psr);
|
| 289 |
|
|
|
| 290 |
|
|
for (i = UREG_G1; i <= UREG_I7; i++)
|
| 291 |
|
|
err |= __get_user(regs->u_regs[i], &sf->info.si_regs.u_regs[i]);
|
| 292 |
|
|
if ((psr & (PSR_VERS|PSR_IMPL)) == PSR_V8PLUS) {
|
| 293 |
|
|
err |= __get_user(i, &sf->v8plus.g_upper[0]);
|
| 294 |
|
|
if (i == SIGINFO_EXTRA_V8PLUS_MAGIC) {
|
| 295 |
|
|
for (i = UREG_G1; i <= UREG_I7; i++)
|
| 296 |
|
|
err |= __get_user(((u32 *)regs->u_regs)[2*i], &sf->v8plus.g_upper[i]);
|
| 297 |
|
|
}
|
| 298 |
|
|
}
|
| 299 |
|
|
|
| 300 |
|
|
/* User can only change condition codes in %tstate. */
|
| 301 |
|
|
regs->tstate &= ~(TSTATE_ICC|TSTATE_XCC);
|
| 302 |
|
|
regs->tstate |= psr_to_tstate_icc(psr);
|
| 303 |
|
|
|
| 304 |
|
|
err |= __get_user(fpu_save, &sf->fpu_save);
|
| 305 |
|
|
if (fpu_save)
|
| 306 |
|
|
err |= restore_fpu_state32(regs, &sf->fpu_state);
|
| 307 |
|
|
err |= __get_user(seta[0], &sf->info.si_mask);
|
| 308 |
|
|
err |= copy_from_user(seta+1, &sf->extramask, (_NSIG_WORDS32 - 1) * sizeof(unsigned));
|
| 309 |
|
|
if (err)
|
| 310 |
|
|
goto segv;
|
| 311 |
|
|
switch (_NSIG_WORDS) {
|
| 312 |
|
|
case 4: set.sig[3] = seta[6] + (((long)seta[7]) << 32);
|
| 313 |
|
|
case 3: set.sig[2] = seta[4] + (((long)seta[5]) << 32);
|
| 314 |
|
|
case 2: set.sig[1] = seta[2] + (((long)seta[3]) << 32);
|
| 315 |
|
|
case 1: set.sig[0] = seta[0] + (((long)seta[1]) << 32);
|
| 316 |
|
|
}
|
| 317 |
|
|
sigdelsetmask(&set, ~_BLOCKABLE);
|
| 318 |
|
|
spin_lock_irq(¤t->sigmask_lock);
|
| 319 |
|
|
current->blocked = set;
|
| 320 |
|
|
recalc_sigpending(current);
|
| 321 |
|
|
spin_unlock_irq(¤t->sigmask_lock);
|
| 322 |
|
|
return;
|
| 323 |
|
|
|
| 324 |
|
|
segv:
|
| 325 |
|
|
do_exit(SIGSEGV);
|
| 326 |
|
|
}
|
| 327 |
|
|
|
| 328 |
|
|
asmlinkage void do_sigreturn32(struct pt_regs *regs)
|
| 329 |
|
|
{
|
| 330 |
|
|
struct sigcontext32 *scptr;
|
| 331 |
|
|
unsigned pc, npc, psr;
|
| 332 |
|
|
sigset_t set;
|
| 333 |
|
|
unsigned seta[_NSIG_WORDS32];
|
| 334 |
|
|
int err;
|
| 335 |
|
|
|
| 336 |
|
|
synchronize_user_stack();
|
| 337 |
|
|
if (current->thread.flags & SPARC_FLAG_NEWSIGNALS)
|
| 338 |
|
|
return do_new_sigreturn32(regs);
|
| 339 |
|
|
|
| 340 |
|
|
scptr = (struct sigcontext32 *)
|
| 341 |
|
|
(regs->u_regs[UREG_I0] & 0x00000000ffffffffUL);
|
| 342 |
|
|
/* Check sanity of the user arg. */
|
| 343 |
|
|
if(verify_area(VERIFY_READ, scptr, sizeof(struct sigcontext32)) ||
|
| 344 |
|
|
(((unsigned long) scptr) & 3))
|
| 345 |
|
|
goto segv;
|
| 346 |
|
|
|
| 347 |
|
|
err = __get_user(pc, &scptr->sigc_pc);
|
| 348 |
|
|
err |= __get_user(npc, &scptr->sigc_npc);
|
| 349 |
|
|
|
| 350 |
|
|
if((pc | npc) & 3)
|
| 351 |
|
|
goto segv; /* Nice try. */
|
| 352 |
|
|
|
| 353 |
|
|
err |= __get_user(seta[0], &scptr->sigc_mask);
|
| 354 |
|
|
/* Note that scptr + 1 points to extramask */
|
| 355 |
|
|
err |= copy_from_user(seta+1, scptr + 1, (_NSIG_WORDS32 - 1) * sizeof(unsigned));
|
| 356 |
|
|
if (err)
|
| 357 |
|
|
goto segv;
|
| 358 |
|
|
switch (_NSIG_WORDS) {
|
| 359 |
|
|
case 4: set.sig[3] = seta[6] + (((long)seta[7]) << 32);
|
| 360 |
|
|
case 3: set.sig[2] = seta[4] + (((long)seta[5]) << 32);
|
| 361 |
|
|
case 2: set.sig[1] = seta[2] + (((long)seta[3]) << 32);
|
| 362 |
|
|
case 1: set.sig[0] = seta[0] + (((long)seta[1]) << 32);
|
| 363 |
|
|
}
|
| 364 |
|
|
sigdelsetmask(&set, ~_BLOCKABLE);
|
| 365 |
|
|
spin_lock_irq(¤t->sigmask_lock);
|
| 366 |
|
|
current->blocked = set;
|
| 367 |
|
|
recalc_sigpending(current);
|
| 368 |
|
|
spin_unlock_irq(¤t->sigmask_lock);
|
| 369 |
|
|
|
| 370 |
|
|
if ((current->thread.flags & SPARC_FLAG_32BIT) != 0) {
|
| 371 |
|
|
pc &= 0xffffffff;
|
| 372 |
|
|
npc &= 0xffffffff;
|
| 373 |
|
|
}
|
| 374 |
|
|
regs->tpc = pc;
|
| 375 |
|
|
regs->tnpc = npc;
|
| 376 |
|
|
err = __get_user(regs->u_regs[UREG_FP], &scptr->sigc_sp);
|
| 377 |
|
|
err |= __get_user(regs->u_regs[UREG_I0], &scptr->sigc_o0);
|
| 378 |
|
|
err |= __get_user(regs->u_regs[UREG_G1], &scptr->sigc_g1);
|
| 379 |
|
|
|
| 380 |
|
|
/* User can only change condition codes in %tstate. */
|
| 381 |
|
|
err |= __get_user(psr, &scptr->sigc_psr);
|
| 382 |
|
|
if (err)
|
| 383 |
|
|
goto segv;
|
| 384 |
|
|
regs->tstate &= ~(TSTATE_ICC|TSTATE_XCC);
|
| 385 |
|
|
regs->tstate |= psr_to_tstate_icc(psr);
|
| 386 |
|
|
return;
|
| 387 |
|
|
|
| 388 |
|
|
segv:
|
| 389 |
|
|
do_exit(SIGSEGV);
|
| 390 |
|
|
}
|
| 391 |
|
|
|
| 392 |
|
|
asmlinkage void do_rt_sigreturn32(struct pt_regs *regs)
|
| 393 |
|
|
{
|
| 394 |
|
|
struct rt_signal_frame32 *sf;
|
| 395 |
|
|
unsigned int psr;
|
| 396 |
|
|
unsigned pc, npc, fpu_save;
|
| 397 |
|
|
mm_segment_t old_fs;
|
| 398 |
|
|
sigset_t set;
|
| 399 |
|
|
sigset_t32 seta;
|
| 400 |
|
|
stack_t st;
|
| 401 |
|
|
int err, i;
|
| 402 |
|
|
|
| 403 |
|
|
synchronize_user_stack();
|
| 404 |
|
|
regs->u_regs[UREG_FP] &= 0x00000000ffffffffUL;
|
| 405 |
|
|
sf = (struct rt_signal_frame32 *) regs->u_regs [UREG_FP];
|
| 406 |
|
|
|
| 407 |
|
|
/* 1. Make sure we are not getting garbage from the user */
|
| 408 |
|
|
if (verify_area (VERIFY_READ, sf, sizeof (*sf)) ||
|
| 409 |
|
|
(((unsigned long) sf) & 3))
|
| 410 |
|
|
goto segv;
|
| 411 |
|
|
|
| 412 |
|
|
get_user(pc, &sf->regs.pc);
|
| 413 |
|
|
__get_user(npc, &sf->regs.npc);
|
| 414 |
|
|
|
| 415 |
|
|
if ((pc | npc) & 3)
|
| 416 |
|
|
goto segv;
|
| 417 |
|
|
|
| 418 |
|
|
if ((current->thread.flags & SPARC_FLAG_32BIT) != 0) {
|
| 419 |
|
|
pc &= 0xffffffff;
|
| 420 |
|
|
npc &= 0xffffffff;
|
| 421 |
|
|
}
|
| 422 |
|
|
regs->tpc = pc;
|
| 423 |
|
|
regs->tnpc = npc;
|
| 424 |
|
|
|
| 425 |
|
|
/* 2. Restore the state */
|
| 426 |
|
|
err = __get_user(regs->y, &sf->regs.y);
|
| 427 |
|
|
err |= __get_user(psr, &sf->regs.psr);
|
| 428 |
|
|
|
| 429 |
|
|
for (i = UREG_G1; i <= UREG_I7; i++)
|
| 430 |
|
|
err |= __get_user(regs->u_regs[i], &sf->regs.u_regs[i]);
|
| 431 |
|
|
if ((psr & (PSR_VERS|PSR_IMPL)) == PSR_V8PLUS) {
|
| 432 |
|
|
err |= __get_user(i, &sf->v8plus.g_upper[0]);
|
| 433 |
|
|
if (i == SIGINFO_EXTRA_V8PLUS_MAGIC) {
|
| 434 |
|
|
for (i = UREG_G1; i <= UREG_I7; i++)
|
| 435 |
|
|
err |= __get_user(((u32 *)regs->u_regs)[2*i], &sf->v8plus.g_upper[i]);
|
| 436 |
|
|
}
|
| 437 |
|
|
}
|
| 438 |
|
|
|
| 439 |
|
|
/* User can only change condition codes in %tstate. */
|
| 440 |
|
|
regs->tstate &= ~(TSTATE_ICC|TSTATE_XCC);
|
| 441 |
|
|
regs->tstate |= psr_to_tstate_icc(psr);
|
| 442 |
|
|
|
| 443 |
|
|
err |= __get_user(fpu_save, &sf->fpu_save);
|
| 444 |
|
|
if (fpu_save)
|
| 445 |
|
|
err |= restore_fpu_state32(regs, &sf->fpu_state);
|
| 446 |
|
|
err |= copy_from_user(&seta, &sf->mask, sizeof(sigset_t32));
|
| 447 |
|
|
err |= __get_user((long)st.ss_sp, &sf->stack.ss_sp);
|
| 448 |
|
|
err |= __get_user(st.ss_flags, &sf->stack.ss_flags);
|
| 449 |
|
|
err |= __get_user(st.ss_size, &sf->stack.ss_size);
|
| 450 |
|
|
if (err)
|
| 451 |
|
|
goto segv;
|
| 452 |
|
|
|
| 453 |
|
|
/* It is more difficult to avoid calling this function than to
|
| 454 |
|
|
call it and ignore errors. */
|
| 455 |
|
|
old_fs = get_fs();
|
| 456 |
|
|
set_fs(KERNEL_DS);
|
| 457 |
|
|
do_sigaltstack(&st, NULL, (unsigned long)sf);
|
| 458 |
|
|
set_fs(old_fs);
|
| 459 |
|
|
|
| 460 |
|
|
switch (_NSIG_WORDS) {
|
| 461 |
|
|
case 4: set.sig[3] = seta.sig[6] + (((long)seta.sig[7]) << 32);
|
| 462 |
|
|
case 3: set.sig[2] = seta.sig[4] + (((long)seta.sig[5]) << 32);
|
| 463 |
|
|
case 2: set.sig[1] = seta.sig[2] + (((long)seta.sig[3]) << 32);
|
| 464 |
|
|
case 1: set.sig[0] = seta.sig[0] + (((long)seta.sig[1]) << 32);
|
| 465 |
|
|
}
|
| 466 |
|
|
sigdelsetmask(&set, ~_BLOCKABLE);
|
| 467 |
|
|
spin_lock_irq(¤t->sigmask_lock);
|
| 468 |
|
|
current->blocked = set;
|
| 469 |
|
|
recalc_sigpending(current);
|
| 470 |
|
|
spin_unlock_irq(¤t->sigmask_lock);
|
| 471 |
|
|
return;
|
| 472 |
|
|
segv:
|
| 473 |
|
|
do_exit(SIGSEGV);
|
| 474 |
|
|
}
|
| 475 |
|
|
|
| 476 |
|
|
/* Checks if the fp is valid */
|
| 477 |
|
|
static int invalid_frame_pointer(void *fp, int fplen)
|
| 478 |
|
|
{
|
| 479 |
|
|
if ((((unsigned long) fp) & 7) || ((unsigned long)fp) > 0x100000000ULL - fplen)
|
| 480 |
|
|
return 1;
|
| 481 |
|
|
return 0;
|
| 482 |
|
|
}
|
| 483 |
|
|
|
| 484 |
|
|
static inline void *get_sigframe(struct sigaction *sa, struct pt_regs *regs, unsigned long framesize)
|
| 485 |
|
|
{
|
| 486 |
|
|
unsigned long sp;
|
| 487 |
|
|
|
| 488 |
|
|
regs->u_regs[UREG_FP] &= 0x00000000ffffffffUL;
|
| 489 |
|
|
sp = regs->u_regs[UREG_FP];
|
| 490 |
|
|
|
| 491 |
|
|
/* This is the X/Open sanctioned signal stack switching. */
|
| 492 |
|
|
if (sa->sa_flags & SA_ONSTACK) {
|
| 493 |
|
|
if (!on_sig_stack(sp) && !((current->sas_ss_sp + current->sas_ss_size) & 7))
|
| 494 |
|
|
sp = current->sas_ss_sp + current->sas_ss_size;
|
| 495 |
|
|
}
|
| 496 |
|
|
return (void *)(sp - framesize);
|
| 497 |
|
|
}
|
| 498 |
|
|
|
| 499 |
|
|
static void
|
| 500 |
|
|
setup_frame32(struct sigaction *sa, struct pt_regs *regs, int signr, sigset_t *oldset, siginfo_t *info)
|
| 501 |
|
|
{
|
| 502 |
|
|
struct signal_sframe32 *sframep;
|
| 503 |
|
|
struct sigcontext32 *sc;
|
| 504 |
|
|
unsigned seta[_NSIG_WORDS32];
|
| 505 |
|
|
int err = 0;
|
| 506 |
|
|
void *sig_address;
|
| 507 |
|
|
int sig_code;
|
| 508 |
|
|
unsigned long pc = regs->tpc;
|
| 509 |
|
|
unsigned long npc = regs->tnpc;
|
| 510 |
|
|
|
| 511 |
|
|
#if 0
|
| 512 |
|
|
int window = 0;
|
| 513 |
|
|
#endif
|
| 514 |
|
|
unsigned psr;
|
| 515 |
|
|
|
| 516 |
|
|
if ((current->thread.flags & SPARC_FLAG_32BIT) != 0) {
|
| 517 |
|
|
pc &= 0xffffffff;
|
| 518 |
|
|
npc &= 0xffffffff;
|
| 519 |
|
|
}
|
| 520 |
|
|
|
| 521 |
|
|
synchronize_user_stack();
|
| 522 |
|
|
save_and_clear_fpu();
|
| 523 |
|
|
|
| 524 |
|
|
sframep = (struct signal_sframe32 *)get_sigframe(sa, regs, SF_ALIGNEDSZ);
|
| 525 |
|
|
if (invalid_frame_pointer (sframep, sizeof(*sframep))){
|
| 526 |
|
|
#ifdef DEBUG_SIGNALS /* fills up the console logs during crashme runs, yuck... */
|
| 527 |
|
|
printk("%s [%d]: User has trashed signal stack\n",
|
| 528 |
|
|
current->comm, current->pid);
|
| 529 |
|
|
printk("Sigstack ptr %p handler at pc<%016lx> for sig<%d>\n",
|
| 530 |
|
|
sframep, pc, signr);
|
| 531 |
|
|
#endif
|
| 532 |
|
|
/* Don't change signal code and address, so that
|
| 533 |
|
|
* post mortem debuggers can have a look.
|
| 534 |
|
|
*/
|
| 535 |
|
|
do_exit(SIGILL);
|
| 536 |
|
|
}
|
| 537 |
|
|
|
| 538 |
|
|
sc = &sframep->sig_context;
|
| 539 |
|
|
|
| 540 |
|
|
/* We've already made sure frame pointer isn't in kernel space... */
|
| 541 |
|
|
err = __put_user((sas_ss_flags(regs->u_regs[UREG_FP]) == SS_ONSTACK),
|
| 542 |
|
|
&sc->sigc_onstack);
|
| 543 |
|
|
|
| 544 |
|
|
switch (_NSIG_WORDS) {
|
| 545 |
|
|
case 4: seta[7] = (oldset->sig[3] >> 32);
|
| 546 |
|
|
seta[6] = oldset->sig[3];
|
| 547 |
|
|
case 3: seta[5] = (oldset->sig[2] >> 32);
|
| 548 |
|
|
seta[4] = oldset->sig[2];
|
| 549 |
|
|
case 2: seta[3] = (oldset->sig[1] >> 32);
|
| 550 |
|
|
seta[2] = oldset->sig[1];
|
| 551 |
|
|
case 1: seta[1] = (oldset->sig[0] >> 32);
|
| 552 |
|
|
seta[0] = oldset->sig[0];
|
| 553 |
|
|
}
|
| 554 |
|
|
err |= __put_user(seta[0], &sc->sigc_mask);
|
| 555 |
|
|
err |= __copy_to_user(sframep->extramask, seta + 1,
|
| 556 |
|
|
(_NSIG_WORDS32 - 1) * sizeof(unsigned));
|
| 557 |
|
|
err |= __put_user(regs->u_regs[UREG_FP], &sc->sigc_sp);
|
| 558 |
|
|
err |= __put_user(pc, &sc->sigc_pc);
|
| 559 |
|
|
err |= __put_user(npc, &sc->sigc_npc);
|
| 560 |
|
|
psr = tstate_to_psr (regs->tstate);
|
| 561 |
|
|
if(current->thread.fpsaved[0] & FPRS_FEF)
|
| 562 |
|
|
psr |= PSR_EF;
|
| 563 |
|
|
err |= __put_user(psr, &sc->sigc_psr);
|
| 564 |
|
|
err |= __put_user(regs->u_regs[UREG_G1], &sc->sigc_g1);
|
| 565 |
|
|
err |= __put_user(regs->u_regs[UREG_I0], &sc->sigc_o0);
|
| 566 |
|
|
err |= __put_user(current->thread.w_saved, &sc->sigc_oswins);
|
| 567 |
|
|
#if 0
|
| 568 |
|
|
/* w_saved is not currently used... */
|
| 569 |
|
|
if(current->thread.w_saved)
|
| 570 |
|
|
for(window = 0; window < current->thread.w_saved; window++) {
|
| 571 |
|
|
sc->sigc_spbuf[window] =
|
| 572 |
|
|
(char *)current->thread.rwbuf_stkptrs[window];
|
| 573 |
|
|
err |= copy_to_user(&sc->sigc_wbuf[window],
|
| 574 |
|
|
¤t->thread.reg_window[window],
|
| 575 |
|
|
sizeof(struct reg_window));
|
| 576 |
|
|
}
|
| 577 |
|
|
else
|
| 578 |
|
|
#endif
|
| 579 |
|
|
err |= copy_in_user((u32 *)sframep,
|
| 580 |
|
|
(u32 *)(regs->u_regs[UREG_FP]),
|
| 581 |
|
|
sizeof(struct reg_window32));
|
| 582 |
|
|
|
| 583 |
|
|
current->thread.w_saved = 0; /* So process is allowed to execute. */
|
| 584 |
|
|
err |= __put_user(signr, &sframep->sig_num);
|
| 585 |
|
|
sig_address = NULL;
|
| 586 |
|
|
sig_code = 0;
|
| 587 |
|
|
if (SI_FROMKERNEL (info) && (info->si_code & __SI_MASK) == __SI_FAULT) {
|
| 588 |
|
|
sig_address = info->si_addr;
|
| 589 |
|
|
switch (signr) {
|
| 590 |
|
|
case SIGSEGV:
|
| 591 |
|
|
switch (info->si_code) {
|
| 592 |
|
|
case SEGV_MAPERR: sig_code = SUBSIG_NOMAPPING; break;
|
| 593 |
|
|
default: sig_code = SUBSIG_PROTECTION; break;
|
| 594 |
|
|
}
|
| 595 |
|
|
break;
|
| 596 |
|
|
case SIGILL:
|
| 597 |
|
|
switch (info->si_code) {
|
| 598 |
|
|
case ILL_ILLOPC: sig_code = SUBSIG_ILLINST; break;
|
| 599 |
|
|
case ILL_PRVOPC: sig_code = SUBSIG_PRIVINST; break;
|
| 600 |
|
|
case ILL_ILLTRP: sig_code = SUBSIG_BADTRAP (info->si_trapno); break;
|
| 601 |
|
|
default: sig_code = SUBSIG_STACK; break;
|
| 602 |
|
|
}
|
| 603 |
|
|
break;
|
| 604 |
|
|
case SIGFPE:
|
| 605 |
|
|
switch (info->si_code) {
|
| 606 |
|
|
case FPE_INTDIV: sig_code = SUBSIG_IDIVZERO; break;
|
| 607 |
|
|
case FPE_INTOVF: sig_code = SUBSIG_FPINTOVFL; break;
|
| 608 |
|
|
case FPE_FLTDIV: sig_code = SUBSIG_FPDIVZERO; break;
|
| 609 |
|
|
case FPE_FLTOVF: sig_code = SUBSIG_FPOVFLOW; break;
|
| 610 |
|
|
case FPE_FLTUND: sig_code = SUBSIG_FPUNFLOW; break;
|
| 611 |
|
|
case FPE_FLTRES: sig_code = SUBSIG_FPINEXACT; break;
|
| 612 |
|
|
case FPE_FLTINV: sig_code = SUBSIG_FPOPERROR; break;
|
| 613 |
|
|
default: sig_code = SUBSIG_FPERROR; break;
|
| 614 |
|
|
}
|
| 615 |
|
|
break;
|
| 616 |
|
|
case SIGBUS:
|
| 617 |
|
|
switch (info->si_code) {
|
| 618 |
|
|
case BUS_ADRALN: sig_code = SUBSIG_ALIGNMENT; break;
|
| 619 |
|
|
case BUS_ADRERR: sig_code = SUBSIG_MISCERROR; break;
|
| 620 |
|
|
default: sig_code = SUBSIG_BUSTIMEOUT; break;
|
| 621 |
|
|
}
|
| 622 |
|
|
break;
|
| 623 |
|
|
case SIGEMT:
|
| 624 |
|
|
switch (info->si_code) {
|
| 625 |
|
|
case EMT_TAGOVF: sig_code = SUBSIG_TAG; break;
|
| 626 |
|
|
}
|
| 627 |
|
|
break;
|
| 628 |
|
|
case SIGSYS:
|
| 629 |
|
|
if (info->si_code == (__SI_FAULT|0x100)) {
|
| 630 |
|
|
/* See sys_sunos32.c */
|
| 631 |
|
|
sig_code = info->si_trapno;
|
| 632 |
|
|
break;
|
| 633 |
|
|
}
|
| 634 |
|
|
default:
|
| 635 |
|
|
sig_address = NULL;
|
| 636 |
|
|
}
|
| 637 |
|
|
}
|
| 638 |
|
|
err |= __put_user((long)sig_address, &sframep->sig_address);
|
| 639 |
|
|
err |= __put_user(sig_code, &sframep->sig_code);
|
| 640 |
|
|
err |= __put_user((u64)sc, &sframep->sig_scptr);
|
| 641 |
|
|
if (err)
|
| 642 |
|
|
goto sigsegv;
|
| 643 |
|
|
|
| 644 |
|
|
regs->u_regs[UREG_FP] = (unsigned long) sframep;
|
| 645 |
|
|
regs->tpc = (unsigned long) sa->sa_handler;
|
| 646 |
|
|
regs->tnpc = (regs->tpc + 4);
|
| 647 |
|
|
if ((current->thread.flags & SPARC_FLAG_32BIT) != 0) {
|
| 648 |
|
|
regs->tpc &= 0xffffffff;
|
| 649 |
|
|
regs->tnpc &= 0xffffffff;
|
| 650 |
|
|
}
|
| 651 |
|
|
return;
|
| 652 |
|
|
|
| 653 |
|
|
sigsegv:
|
| 654 |
|
|
do_exit(SIGSEGV);
|
| 655 |
|
|
}
|
| 656 |
|
|
|
| 657 |
|
|
|
| 658 |
|
|
static inline int save_fpu_state32(struct pt_regs *regs, __siginfo_fpu_t *fpu)
|
| 659 |
|
|
{
|
| 660 |
|
|
unsigned long *fpregs = (unsigned long *)(((char *)current) + AOFF_task_fpregs);
|
| 661 |
|
|
unsigned long fprs;
|
| 662 |
|
|
int err = 0;
|
| 663 |
|
|
|
| 664 |
|
|
fprs = current->thread.fpsaved[0];
|
| 665 |
|
|
if (fprs & FPRS_DL)
|
| 666 |
|
|
err |= copy_to_user(&fpu->si_float_regs[0], fpregs,
|
| 667 |
|
|
(sizeof(unsigned int) * 32));
|
| 668 |
|
|
if (fprs & FPRS_DU)
|
| 669 |
|
|
err |= copy_to_user(&fpu->si_float_regs[32], fpregs+16,
|
| 670 |
|
|
(sizeof(unsigned int) * 32));
|
| 671 |
|
|
err |= __put_user(current->thread.xfsr[0], &fpu->si_fsr);
|
| 672 |
|
|
err |= __put_user(current->thread.gsr[0], &fpu->si_gsr);
|
| 673 |
|
|
err |= __put_user(fprs, &fpu->si_fprs);
|
| 674 |
|
|
|
| 675 |
|
|
return err;
|
| 676 |
|
|
}
|
| 677 |
|
|
|
| 678 |
|
|
static inline void new_setup_frame32(struct k_sigaction *ka, struct pt_regs *regs,
|
| 679 |
|
|
int signo, sigset_t *oldset)
|
| 680 |
|
|
{
|
| 681 |
|
|
struct new_signal_frame32 *sf;
|
| 682 |
|
|
int sigframe_size;
|
| 683 |
|
|
u32 psr;
|
| 684 |
|
|
int i, err;
|
| 685 |
|
|
unsigned seta[_NSIG_WORDS32];
|
| 686 |
|
|
|
| 687 |
|
|
/* 1. Make sure everything is clean */
|
| 688 |
|
|
synchronize_user_stack();
|
| 689 |
|
|
save_and_clear_fpu();
|
| 690 |
|
|
|
| 691 |
|
|
sigframe_size = NF_ALIGNEDSZ;
|
| 692 |
|
|
if (!(current->thread.fpsaved[0] & FPRS_FEF))
|
| 693 |
|
|
sigframe_size -= sizeof(__siginfo_fpu_t);
|
| 694 |
|
|
|
| 695 |
|
|
sf = (struct new_signal_frame32 *)get_sigframe(&ka->sa, regs, sigframe_size);
|
| 696 |
|
|
|
| 697 |
|
|
if (invalid_frame_pointer (sf, sigframe_size)) {
|
| 698 |
|
|
#ifdef DEBUG_SIGNALS
|
| 699 |
|
|
printk("new_setup_frame32(%s:%d): invalid_frame_pointer(%p, %d)\n",
|
| 700 |
|
|
current->comm, current->pid, sf, sigframe_size);
|
| 701 |
|
|
#endif
|
| 702 |
|
|
goto sigill;
|
| 703 |
|
|
}
|
| 704 |
|
|
|
| 705 |
|
|
if (current->thread.w_saved != 0) {
|
| 706 |
|
|
#ifdef DEBUG_SIGNALS
|
| 707 |
|
|
printk ("%s[%d]: Invalid user stack frame for "
|
| 708 |
|
|
"signal delivery.\n", current->comm, current->pid);
|
| 709 |
|
|
#endif
|
| 710 |
|
|
goto sigill;
|
| 711 |
|
|
}
|
| 712 |
|
|
|
| 713 |
|
|
/* 2. Save the current process state */
|
| 714 |
|
|
if ((current->thread.flags & SPARC_FLAG_32BIT) != 0) {
|
| 715 |
|
|
regs->tpc &= 0xffffffff;
|
| 716 |
|
|
regs->tnpc &= 0xffffffff;
|
| 717 |
|
|
}
|
| 718 |
|
|
err = put_user(regs->tpc, &sf->info.si_regs.pc);
|
| 719 |
|
|
err |= __put_user(regs->tnpc, &sf->info.si_regs.npc);
|
| 720 |
|
|
err |= __put_user(regs->y, &sf->info.si_regs.y);
|
| 721 |
|
|
psr = tstate_to_psr (regs->tstate);
|
| 722 |
|
|
if(current->thread.fpsaved[0] & FPRS_FEF)
|
| 723 |
|
|
psr |= PSR_EF;
|
| 724 |
|
|
err |= __put_user(psr, &sf->info.si_regs.psr);
|
| 725 |
|
|
for (i = 0; i < 16; i++)
|
| 726 |
|
|
err |= __put_user(regs->u_regs[i], &sf->info.si_regs.u_regs[i]);
|
| 727 |
|
|
err |= __put_user(sizeof(siginfo_extra_v8plus_t), &sf->extra_size);
|
| 728 |
|
|
err |= __put_user(SIGINFO_EXTRA_V8PLUS_MAGIC, &sf->v8plus.g_upper[0]);
|
| 729 |
|
|
for (i = 1; i < 16; i++)
|
| 730 |
|
|
err |= __put_user(((u32 *)regs->u_regs)[2*i], &sf->v8plus.g_upper[i]);
|
| 731 |
|
|
|
| 732 |
|
|
if (psr & PSR_EF) {
|
| 733 |
|
|
err |= save_fpu_state32(regs, &sf->fpu_state);
|
| 734 |
|
|
err |= __put_user((u64)&sf->fpu_state, &sf->fpu_save);
|
| 735 |
|
|
} else {
|
| 736 |
|
|
err |= __put_user(0, &sf->fpu_save);
|
| 737 |
|
|
}
|
| 738 |
|
|
|
| 739 |
|
|
switch (_NSIG_WORDS) {
|
| 740 |
|
|
case 4: seta[7] = (oldset->sig[3] >> 32);
|
| 741 |
|
|
seta[6] = oldset->sig[3];
|
| 742 |
|
|
case 3: seta[5] = (oldset->sig[2] >> 32);
|
| 743 |
|
|
seta[4] = oldset->sig[2];
|
| 744 |
|
|
case 2: seta[3] = (oldset->sig[1] >> 32);
|
| 745 |
|
|
seta[2] = oldset->sig[1];
|
| 746 |
|
|
case 1: seta[1] = (oldset->sig[0] >> 32);
|
| 747 |
|
|
seta[0] = oldset->sig[0];
|
| 748 |
|
|
}
|
| 749 |
|
|
err |= __put_user(seta[0], &sf->info.si_mask);
|
| 750 |
|
|
err |= __copy_to_user(sf->extramask, seta + 1,
|
| 751 |
|
|
(_NSIG_WORDS32 - 1) * sizeof(unsigned));
|
| 752 |
|
|
|
| 753 |
|
|
err |= copy_in_user((u32 *)sf,
|
| 754 |
|
|
(u32 *)(regs->u_regs[UREG_FP]),
|
| 755 |
|
|
sizeof(struct reg_window32));
|
| 756 |
|
|
|
| 757 |
|
|
if (err)
|
| 758 |
|
|
goto sigsegv;
|
| 759 |
|
|
|
| 760 |
|
|
/* 3. signal handler back-trampoline and parameters */
|
| 761 |
|
|
regs->u_regs[UREG_FP] = (unsigned long) sf;
|
| 762 |
|
|
regs->u_regs[UREG_I0] = signo;
|
| 763 |
|
|
regs->u_regs[UREG_I1] = (unsigned long) &sf->info;
|
| 764 |
|
|
regs->u_regs[UREG_I2] = (unsigned long) &sf->info;
|
| 765 |
|
|
|
| 766 |
|
|
/* 4. signal handler */
|
| 767 |
|
|
regs->tpc = (unsigned long) ka->sa.sa_handler;
|
| 768 |
|
|
regs->tnpc = (regs->tpc + 4);
|
| 769 |
|
|
if ((current->thread.flags & SPARC_FLAG_32BIT) != 0) {
|
| 770 |
|
|
regs->tpc &= 0xffffffff;
|
| 771 |
|
|
regs->tnpc &= 0xffffffff;
|
| 772 |
|
|
}
|
| 773 |
|
|
|
| 774 |
|
|
/* 5. return to kernel instructions */
|
| 775 |
|
|
if (ka->ka_restorer) {
|
| 776 |
|
|
regs->u_regs[UREG_I7] = (unsigned long)ka->ka_restorer;
|
| 777 |
|
|
} else {
|
| 778 |
|
|
/* Flush instruction space. */
|
| 779 |
|
|
unsigned long address = ((unsigned long)&(sf->insns[0]));
|
| 780 |
|
|
pgd_t *pgdp = pgd_offset(current->mm, address);
|
| 781 |
|
|
pmd_t *pmdp = pmd_offset(pgdp, address);
|
| 782 |
|
|
pte_t *ptep = pte_offset(pmdp, address);
|
| 783 |
|
|
|
| 784 |
|
|
regs->u_regs[UREG_I7] = (unsigned long) (&(sf->insns[0]) - 2);
|
| 785 |
|
|
|
| 786 |
|
|
err = __put_user(0x821020d8, &sf->insns[0]); /*mov __NR_sigreturn, %g1*/
|
| 787 |
|
|
err |= __put_user(0x91d02010, &sf->insns[1]); /*t 0x10*/
|
| 788 |
|
|
if(err)
|
| 789 |
|
|
goto sigsegv;
|
| 790 |
|
|
|
| 791 |
|
|
if(pte_present(*ptep)) {
|
| 792 |
|
|
unsigned long page = (unsigned long) page_address(pte_page(*ptep));
|
| 793 |
|
|
|
| 794 |
|
|
__asm__ __volatile__(
|
| 795 |
|
|
" membar #StoreStore\n"
|
| 796 |
|
|
" flush %0 + %1"
|
| 797 |
|
|
: : "r" (page), "r" (address & (PAGE_SIZE - 1))
|
| 798 |
|
|
: "memory");
|
| 799 |
|
|
}
|
| 800 |
|
|
}
|
| 801 |
|
|
return;
|
| 802 |
|
|
|
| 803 |
|
|
sigill:
|
| 804 |
|
|
do_exit(SIGILL);
|
| 805 |
|
|
sigsegv:
|
| 806 |
|
|
do_exit(SIGSEGV);
|
| 807 |
|
|
}
|
| 808 |
|
|
|
| 809 |
|
|
/* Setup a Solaris stack frame */
|
| 810 |
|
|
static inline void
|
| 811 |
|
|
setup_svr4_frame32(struct sigaction *sa, unsigned long pc, unsigned long npc,
|
| 812 |
|
|
struct pt_regs *regs, int signr, sigset_t *oldset)
|
| 813 |
|
|
{
|
| 814 |
|
|
svr4_signal_frame_t *sfp;
|
| 815 |
|
|
svr4_gregset_t *gr;
|
| 816 |
|
|
svr4_siginfo_t *si;
|
| 817 |
|
|
svr4_mcontext_t *mc;
|
| 818 |
|
|
svr4_gwindows_t *gw;
|
| 819 |
|
|
svr4_ucontext_t *uc;
|
| 820 |
|
|
svr4_sigset_t setv;
|
| 821 |
|
|
#if 0
|
| 822 |
|
|
int window = 0;
|
| 823 |
|
|
#endif
|
| 824 |
|
|
unsigned psr;
|
| 825 |
|
|
int i, err;
|
| 826 |
|
|
|
| 827 |
|
|
synchronize_user_stack();
|
| 828 |
|
|
save_and_clear_fpu();
|
| 829 |
|
|
|
| 830 |
|
|
regs->u_regs[UREG_FP] &= 0x00000000ffffffffUL;
|
| 831 |
|
|
sfp = (svr4_signal_frame_t *) get_sigframe(sa, regs, sizeof(struct reg_window32) + SVR4_SF_ALIGNED);
|
| 832 |
|
|
|
| 833 |
|
|
if (invalid_frame_pointer (sfp, sizeof (*sfp))){
|
| 834 |
|
|
#ifdef DEBUG_SIGNALS
|
| 835 |
|
|
printk ("Invalid stack frame\n");
|
| 836 |
|
|
#endif
|
| 837 |
|
|
do_exit(SIGILL);
|
| 838 |
|
|
}
|
| 839 |
|
|
|
| 840 |
|
|
/* Start with a clean frame pointer and fill it */
|
| 841 |
|
|
err = clear_user(sfp, sizeof (*sfp));
|
| 842 |
|
|
|
| 843 |
|
|
/* Setup convenience variables */
|
| 844 |
|
|
si = &sfp->si;
|
| 845 |
|
|
uc = &sfp->uc;
|
| 846 |
|
|
gw = &sfp->gw;
|
| 847 |
|
|
mc = &uc->mcontext;
|
| 848 |
|
|
gr = &mc->greg;
|
| 849 |
|
|
|
| 850 |
|
|
/* FIXME: where am I supposed to put this?
|
| 851 |
|
|
* sc->sigc_onstack = old_status;
|
| 852 |
|
|
* anyways, it does not look like it is used for anything at all.
|
| 853 |
|
|
*/
|
| 854 |
|
|
setv.sigbits[0] = oldset->sig[0];
|
| 855 |
|
|
setv.sigbits[1] = (oldset->sig[0] >> 32);
|
| 856 |
|
|
if (_NSIG_WORDS >= 2) {
|
| 857 |
|
|
setv.sigbits[2] = oldset->sig[1];
|
| 858 |
|
|
setv.sigbits[3] = (oldset->sig[1] >> 32);
|
| 859 |
|
|
err |= __copy_to_user(&uc->sigmask, &setv, sizeof(svr4_sigset_t));
|
| 860 |
|
|
} else
|
| 861 |
|
|
err |= __copy_to_user(&uc->sigmask, &setv, 2 * sizeof(unsigned));
|
| 862 |
|
|
|
| 863 |
|
|
/* Store registers */
|
| 864 |
|
|
if ((current->thread.flags & SPARC_FLAG_32BIT) != 0) {
|
| 865 |
|
|
regs->tpc &= 0xffffffff;
|
| 866 |
|
|
regs->tnpc &= 0xffffffff;
|
| 867 |
|
|
}
|
| 868 |
|
|
err |= __put_user(regs->tpc, &((*gr) [SVR4_PC]));
|
| 869 |
|
|
err |= __put_user(regs->tnpc, &((*gr) [SVR4_NPC]));
|
| 870 |
|
|
psr = tstate_to_psr (regs->tstate);
|
| 871 |
|
|
if(current->thread.fpsaved[0] & FPRS_FEF)
|
| 872 |
|
|
psr |= PSR_EF;
|
| 873 |
|
|
err |= __put_user(psr, &((*gr) [SVR4_PSR]));
|
| 874 |
|
|
err |= __put_user(regs->y, &((*gr) [SVR4_Y]));
|
| 875 |
|
|
|
| 876 |
|
|
/* Copy g [1..7] and o [0..7] registers */
|
| 877 |
|
|
for (i = 0; i < 7; i++)
|
| 878 |
|
|
err |= __put_user(regs->u_regs[UREG_G1+i], (&(*gr)[SVR4_G1])+i);
|
| 879 |
|
|
for (i = 0; i < 8; i++)
|
| 880 |
|
|
err |= __put_user(regs->u_regs[UREG_I0+i], (&(*gr)[SVR4_O0])+i);
|
| 881 |
|
|
|
| 882 |
|
|
/* Setup sigaltstack */
|
| 883 |
|
|
err |= __put_user(current->sas_ss_sp, &uc->stack.sp);
|
| 884 |
|
|
err |= __put_user(sas_ss_flags(regs->u_regs[UREG_FP]), &uc->stack.flags);
|
| 885 |
|
|
err |= __put_user(current->sas_ss_size, &uc->stack.size);
|
| 886 |
|
|
|
| 887 |
|
|
/* Save the currently window file: */
|
| 888 |
|
|
|
| 889 |
|
|
/* 1. Link sfp->uc->gwins to our windows */
|
| 890 |
|
|
err |= __put_user((u32)(long)gw, &mc->gwin);
|
| 891 |
|
|
|
| 892 |
|
|
/* 2. Number of windows to restore at setcontext (): */
|
| 893 |
|
|
err |= __put_user(current->thread.w_saved, &gw->count);
|
| 894 |
|
|
|
| 895 |
|
|
/* 3. Save each valid window
|
| 896 |
|
|
* Currently, it makes a copy of the windows from the kernel copy.
|
| 897 |
|
|
* David's code for SunOS, makes the copy but keeps the pointer to
|
| 898 |
|
|
* the kernel. My version makes the pointer point to a userland
|
| 899 |
|
|
* copy of those. Mhm, I wonder if I shouldn't just ignore those
|
| 900 |
|
|
* on setcontext and use those that are on the kernel, the signal
|
| 901 |
|
|
* handler should not be modyfing those, mhm.
|
| 902 |
|
|
*
|
| 903 |
|
|
* These windows are just used in case synchronize_user_stack failed
|
| 904 |
|
|
* to flush the user windows.
|
| 905 |
|
|
*/
|
| 906 |
|
|
#if 0
|
| 907 |
|
|
for(window = 0; window < current->thread.w_saved; window++) {
|
| 908 |
|
|
err |= __put_user((int *) &(gw->win [window]),
|
| 909 |
|
|
(int **)gw->winptr +window );
|
| 910 |
|
|
err |= copy_to_user(&gw->win [window],
|
| 911 |
|
|
¤t->thread.reg_window [window],
|
| 912 |
|
|
sizeof (svr4_rwindow_t));
|
| 913 |
|
|
err |= __put_user(0, (int *)gw->winptr + window);
|
| 914 |
|
|
}
|
| 915 |
|
|
#endif
|
| 916 |
|
|
|
| 917 |
|
|
/* 4. We just pay attention to the gw->count field on setcontext */
|
| 918 |
|
|
current->thread.w_saved = 0; /* So process is allowed to execute. */
|
| 919 |
|
|
|
| 920 |
|
|
/* Setup the signal information. Solaris expects a bunch of
|
| 921 |
|
|
* information to be passed to the signal handler, we don't provide
|
| 922 |
|
|
* that much currently, should use siginfo.
|
| 923 |
|
|
*/
|
| 924 |
|
|
err |= __put_user(signr, &si->siginfo.signo);
|
| 925 |
|
|
err |= __put_user(SVR4_SINOINFO, &si->siginfo.code);
|
| 926 |
|
|
if (err)
|
| 927 |
|
|
goto sigsegv;
|
| 928 |
|
|
|
| 929 |
|
|
regs->u_regs[UREG_FP] = (unsigned long) sfp;
|
| 930 |
|
|
regs->tpc = (unsigned long) sa->sa_handler;
|
| 931 |
|
|
regs->tnpc = (regs->tpc + 4);
|
| 932 |
|
|
if ((current->thread.flags & SPARC_FLAG_32BIT) != 0) {
|
| 933 |
|
|
regs->tpc &= 0xffffffff;
|
| 934 |
|
|
regs->tnpc &= 0xffffffff;
|
| 935 |
|
|
}
|
| 936 |
|
|
|
| 937 |
|
|
#ifdef DEBUG_SIGNALS
|
| 938 |
|
|
printk ("Solaris-frame: %x %x\n", (int) regs->tpc, (int) regs->tnpc);
|
| 939 |
|
|
#endif
|
| 940 |
|
|
/* Arguments passed to signal handler */
|
| 941 |
|
|
if (regs->u_regs [14]){
|
| 942 |
|
|
struct reg_window32 *rw = (struct reg_window32 *)
|
| 943 |
|
|
(regs->u_regs [14] & 0x00000000ffffffffUL);
|
| 944 |
|
|
|
| 945 |
|
|
err |= __put_user(signr, &rw->ins [0]);
|
| 946 |
|
|
err |= __put_user((u64)si, &rw->ins [1]);
|
| 947 |
|
|
err |= __put_user((u64)uc, &rw->ins [2]);
|
| 948 |
|
|
err |= __put_user((u64)sfp, &rw->ins [6]); /* frame pointer */
|
| 949 |
|
|
if (err)
|
| 950 |
|
|
goto sigsegv;
|
| 951 |
|
|
|
| 952 |
|
|
regs->u_regs[UREG_I0] = signr;
|
| 953 |
|
|
regs->u_regs[UREG_I1] = (u32)(u64) si;
|
| 954 |
|
|
regs->u_regs[UREG_I2] = (u32)(u64) uc;
|
| 955 |
|
|
}
|
| 956 |
|
|
return;
|
| 957 |
|
|
|
| 958 |
|
|
sigsegv:
|
| 959 |
|
|
do_exit(SIGSEGV);
|
| 960 |
|
|
}
|
| 961 |
|
|
|
| 962 |
|
|
asmlinkage int
|
| 963 |
|
|
svr4_getcontext(svr4_ucontext_t *uc, struct pt_regs *regs)
|
| 964 |
|
|
{
|
| 965 |
|
|
svr4_gregset_t *gr;
|
| 966 |
|
|
svr4_mcontext_t *mc;
|
| 967 |
|
|
svr4_sigset_t setv;
|
| 968 |
|
|
int i, err;
|
| 969 |
|
|
|
| 970 |
|
|
synchronize_user_stack();
|
| 971 |
|
|
save_and_clear_fpu();
|
| 972 |
|
|
|
| 973 |
|
|
if (current->thread.w_saved){
|
| 974 |
|
|
printk ("Uh oh, w_saved is not zero (%d)\n", (int) current->thread.w_saved);
|
| 975 |
|
|
do_exit (SIGSEGV);
|
| 976 |
|
|
}
|
| 977 |
|
|
err = clear_user(uc, sizeof (*uc));
|
| 978 |
|
|
|
| 979 |
|
|
/* Setup convenience variables */
|
| 980 |
|
|
mc = &uc->mcontext;
|
| 981 |
|
|
gr = &mc->greg;
|
| 982 |
|
|
|
| 983 |
|
|
setv.sigbits[0] = current->blocked.sig[0];
|
| 984 |
|
|
setv.sigbits[1] = (current->blocked.sig[0] >> 32);
|
| 985 |
|
|
if (_NSIG_WORDS >= 2) {
|
| 986 |
|
|
setv.sigbits[2] = current->blocked.sig[1];
|
| 987 |
|
|
setv.sigbits[3] = (current->blocked.sig[1] >> 32);
|
| 988 |
|
|
err |= __copy_to_user(&uc->sigmask, &setv, sizeof(svr4_sigset_t));
|
| 989 |
|
|
} else
|
| 990 |
|
|
err |= __copy_to_user(&uc->sigmask, &setv, 2 * sizeof(unsigned));
|
| 991 |
|
|
|
| 992 |
|
|
/* Store registers */
|
| 993 |
|
|
if ((current->thread.flags & SPARC_FLAG_32BIT) != 0) {
|
| 994 |
|
|
regs->tpc &= 0xffffffff;
|
| 995 |
|
|
regs->tnpc &= 0xffffffff;
|
| 996 |
|
|
}
|
| 997 |
|
|
err |= __put_user(regs->tpc, &uc->mcontext.greg [SVR4_PC]);
|
| 998 |
|
|
err |= __put_user(regs->tnpc, &uc->mcontext.greg [SVR4_NPC]);
|
| 999 |
|
|
#if 1
|
| 1000 |
|
|
err |= __put_user(0, &uc->mcontext.greg [SVR4_PSR]);
|
| 1001 |
|
|
#else
|
| 1002 |
|
|
i = tstate_to_psr(regs->tstate) & ~PSR_EF;
|
| 1003 |
|
|
if (current->thread.fpsaved[0] & FPRS_FEF)
|
| 1004 |
|
|
i |= PSR_EF;
|
| 1005 |
|
|
err |= __put_user(i, &uc->mcontext.greg [SVR4_PSR]);
|
| 1006 |
|
|
#endif
|
| 1007 |
|
|
err |= __put_user(regs->y, &uc->mcontext.greg [SVR4_Y]);
|
| 1008 |
|
|
|
| 1009 |
|
|
/* Copy g [1..7] and o [0..7] registers */
|
| 1010 |
|
|
for (i = 0; i < 7; i++)
|
| 1011 |
|
|
err |= __put_user(regs->u_regs[UREG_G1+i], (&(*gr)[SVR4_G1])+i);
|
| 1012 |
|
|
for (i = 0; i < 8; i++)
|
| 1013 |
|
|
err |= __put_user(regs->u_regs[UREG_I0+i], (&(*gr)[SVR4_O0])+i);
|
| 1014 |
|
|
|
| 1015 |
|
|
/* Setup sigaltstack */
|
| 1016 |
|
|
err |= __put_user(current->sas_ss_sp, &uc->stack.sp);
|
| 1017 |
|
|
err |= __put_user(sas_ss_flags(regs->u_regs[UREG_FP]), &uc->stack.flags);
|
| 1018 |
|
|
err |= __put_user(current->sas_ss_size, &uc->stack.size);
|
| 1019 |
|
|
|
| 1020 |
|
|
/* The register file is not saved
|
| 1021 |
|
|
* we have already stuffed all of it with sync_user_stack
|
| 1022 |
|
|
*/
|
| 1023 |
|
|
return (err ? -EFAULT : 0);
|
| 1024 |
|
|
}
|
| 1025 |
|
|
|
| 1026 |
|
|
|
| 1027 |
|
|
/* Set the context for a svr4 application, this is Solaris way to sigreturn */
|
| 1028 |
|
|
asmlinkage int svr4_setcontext(svr4_ucontext_t *c, struct pt_regs *regs)
|
| 1029 |
|
|
{
|
| 1030 |
|
|
struct thread_struct *tp = ¤t->thread;
|
| 1031 |
|
|
svr4_gregset_t *gr;
|
| 1032 |
|
|
mm_segment_t old_fs;
|
| 1033 |
|
|
u32 pc, npc, psr;
|
| 1034 |
|
|
sigset_t set;
|
| 1035 |
|
|
svr4_sigset_t setv;
|
| 1036 |
|
|
int i, err;
|
| 1037 |
|
|
stack_t st;
|
| 1038 |
|
|
|
| 1039 |
|
|
/* Fixme: restore windows, or is this already taken care of in
|
| 1040 |
|
|
* svr4_setup_frame when sync_user_windows is done?
|
| 1041 |
|
|
*/
|
| 1042 |
|
|
flush_user_windows();
|
| 1043 |
|
|
|
| 1044 |
|
|
if (tp->w_saved){
|
| 1045 |
|
|
printk ("Uh oh, w_saved is: 0x%x\n", tp->w_saved);
|
| 1046 |
|
|
goto sigsegv;
|
| 1047 |
|
|
}
|
| 1048 |
|
|
if (((unsigned long) c) & 3){
|
| 1049 |
|
|
printk ("Unaligned structure passed\n");
|
| 1050 |
|
|
goto sigsegv;
|
| 1051 |
|
|
}
|
| 1052 |
|
|
|
| 1053 |
|
|
if(!__access_ok((unsigned long)c, sizeof(*c))) {
|
| 1054 |
|
|
/* Miguel, add nice debugging msg _here_. ;-) */
|
| 1055 |
|
|
goto sigsegv;
|
| 1056 |
|
|
}
|
| 1057 |
|
|
|
| 1058 |
|
|
/* Check for valid PC and nPC */
|
| 1059 |
|
|
gr = &c->mcontext.greg;
|
| 1060 |
|
|
err = __get_user(pc, &((*gr)[SVR4_PC]));
|
| 1061 |
|
|
err |= __get_user(npc, &((*gr)[SVR4_NPC]));
|
| 1062 |
|
|
if((pc | npc) & 3) {
|
| 1063 |
|
|
#ifdef DEBUG_SIGNALS
|
| 1064 |
|
|
printk ("setcontext, PC or nPC were bogus\n");
|
| 1065 |
|
|
#endif
|
| 1066 |
|
|
goto sigsegv;
|
| 1067 |
|
|
}
|
| 1068 |
|
|
|
| 1069 |
|
|
/* Retrieve information from passed ucontext */
|
| 1070 |
|
|
/* note that nPC is ored a 1, this is used to inform entry.S */
|
| 1071 |
|
|
/* that we don't want it to mess with our PC and nPC */
|
| 1072 |
|
|
|
| 1073 |
|
|
err |= copy_from_user (&setv, &c->sigmask, sizeof(svr4_sigset_t));
|
| 1074 |
|
|
set.sig[0] = setv.sigbits[0] | (((long)setv.sigbits[1]) << 32);
|
| 1075 |
|
|
if (_NSIG_WORDS >= 2)
|
| 1076 |
|
|
set.sig[1] = setv.sigbits[2] | (((long)setv.sigbits[3]) << 32);
|
| 1077 |
|
|
|
| 1078 |
|
|
err |= __get_user((long)st.ss_sp, &c->stack.sp);
|
| 1079 |
|
|
err |= __get_user(st.ss_flags, &c->stack.flags);
|
| 1080 |
|
|
err |= __get_user(st.ss_size, &c->stack.size);
|
| 1081 |
|
|
if (err)
|
| 1082 |
|
|
goto sigsegv;
|
| 1083 |
|
|
|
| 1084 |
|
|
/* It is more difficult to avoid calling this function than to
|
| 1085 |
|
|
call it and ignore errors. */
|
| 1086 |
|
|
old_fs = get_fs();
|
| 1087 |
|
|
set_fs(KERNEL_DS);
|
| 1088 |
|
|
do_sigaltstack(&st, NULL, regs->u_regs[UREG_I6]);
|
| 1089 |
|
|
set_fs(old_fs);
|
| 1090 |
|
|
|
| 1091 |
|
|
sigdelsetmask(&set, ~_BLOCKABLE);
|
| 1092 |
|
|
spin_lock_irq(¤t->sigmask_lock);
|
| 1093 |
|
|
current->blocked = set;
|
| 1094 |
|
|
recalc_sigpending(current);
|
| 1095 |
|
|
spin_unlock_irq(¤t->sigmask_lock);
|
| 1096 |
|
|
regs->tpc = pc;
|
| 1097 |
|
|
regs->tnpc = npc | 1;
|
| 1098 |
|
|
if ((current->thread.flags & SPARC_FLAG_32BIT) != 0) {
|
| 1099 |
|
|
regs->tpc &= 0xffffffff;
|
| 1100 |
|
|
regs->tnpc &= 0xffffffff;
|
| 1101 |
|
|
}
|
| 1102 |
|
|
err |= __get_user(regs->y, &((*gr) [SVR4_Y]));
|
| 1103 |
|
|
err |= __get_user(psr, &((*gr) [SVR4_PSR]));
|
| 1104 |
|
|
regs->tstate &= ~(TSTATE_ICC|TSTATE_XCC);
|
| 1105 |
|
|
regs->tstate |= psr_to_tstate_icc(psr);
|
| 1106 |
|
|
#if 0
|
| 1107 |
|
|
if(psr & PSR_EF)
|
| 1108 |
|
|
regs->tstate |= TSTATE_PEF;
|
| 1109 |
|
|
#endif
|
| 1110 |
|
|
/* Restore g[1..7] and o[0..7] registers */
|
| 1111 |
|
|
for (i = 0; i < 7; i++)
|
| 1112 |
|
|
err |= __get_user(regs->u_regs[UREG_G1+i], (&(*gr)[SVR4_G1])+i);
|
| 1113 |
|
|
for (i = 0; i < 8; i++)
|
| 1114 |
|
|
err |= __get_user(regs->u_regs[UREG_I0+i], (&(*gr)[SVR4_O0])+i);
|
| 1115 |
|
|
if(err)
|
| 1116 |
|
|
goto sigsegv;
|
| 1117 |
|
|
|
| 1118 |
|
|
return -EINTR;
|
| 1119 |
|
|
sigsegv:
|
| 1120 |
|
|
do_exit(SIGSEGV);
|
| 1121 |
|
|
}
|
| 1122 |
|
|
|
| 1123 |
|
|
static inline void setup_rt_frame32(struct k_sigaction *ka, struct pt_regs *regs,
|
| 1124 |
|
|
unsigned long signr, sigset_t *oldset,
|
| 1125 |
|
|
siginfo_t *info)
|
| 1126 |
|
|
{
|
| 1127 |
|
|
struct rt_signal_frame32 *sf;
|
| 1128 |
|
|
int sigframe_size;
|
| 1129 |
|
|
u32 psr;
|
| 1130 |
|
|
int i, err;
|
| 1131 |
|
|
sigset_t32 seta;
|
| 1132 |
|
|
|
| 1133 |
|
|
/* 1. Make sure everything is clean */
|
| 1134 |
|
|
synchronize_user_stack();
|
| 1135 |
|
|
save_and_clear_fpu();
|
| 1136 |
|
|
|
| 1137 |
|
|
sigframe_size = RT_ALIGNEDSZ;
|
| 1138 |
|
|
if (!(current->thread.fpsaved[0] & FPRS_FEF))
|
| 1139 |
|
|
sigframe_size -= sizeof(__siginfo_fpu_t);
|
| 1140 |
|
|
|
| 1141 |
|
|
sf = (struct rt_signal_frame32 *)get_sigframe(&ka->sa, regs, sigframe_size);
|
| 1142 |
|
|
|
| 1143 |
|
|
if (invalid_frame_pointer (sf, sigframe_size)) {
|
| 1144 |
|
|
#ifdef DEBUG_SIGNALS
|
| 1145 |
|
|
printk("rt_setup_frame32(%s:%d): invalid_frame_pointer(%p, %d)\n",
|
| 1146 |
|
|
current->comm, current->pid, sf, sigframe_size);
|
| 1147 |
|
|
#endif
|
| 1148 |
|
|
goto sigill;
|
| 1149 |
|
|
}
|
| 1150 |
|
|
|
| 1151 |
|
|
if (current->thread.w_saved != 0) {
|
| 1152 |
|
|
#ifdef DEBUG_SIGNALS
|
| 1153 |
|
|
printk ("%s[%d]: Invalid user stack frame for "
|
| 1154 |
|
|
"signal delivery.\n", current->comm, current->pid);
|
| 1155 |
|
|
#endif
|
| 1156 |
|
|
goto sigill;
|
| 1157 |
|
|
}
|
| 1158 |
|
|
|
| 1159 |
|
|
/* 2. Save the current process state */
|
| 1160 |
|
|
if ((current->thread.flags & SPARC_FLAG_32BIT) != 0) {
|
| 1161 |
|
|
regs->tpc &= 0xffffffff;
|
| 1162 |
|
|
regs->tnpc &= 0xffffffff;
|
| 1163 |
|
|
}
|
| 1164 |
|
|
err = put_user(regs->tpc, &sf->regs.pc);
|
| 1165 |
|
|
err |= __put_user(regs->tnpc, &sf->regs.npc);
|
| 1166 |
|
|
err |= __put_user(regs->y, &sf->regs.y);
|
| 1167 |
|
|
psr = tstate_to_psr (regs->tstate);
|
| 1168 |
|
|
if(current->thread.fpsaved[0] & FPRS_FEF)
|
| 1169 |
|
|
psr |= PSR_EF;
|
| 1170 |
|
|
err |= __put_user(psr, &sf->regs.psr);
|
| 1171 |
|
|
for (i = 0; i < 16; i++)
|
| 1172 |
|
|
err |= __put_user(regs->u_regs[i], &sf->regs.u_regs[i]);
|
| 1173 |
|
|
err |= __put_user(sizeof(siginfo_extra_v8plus_t), &sf->extra_size);
|
| 1174 |
|
|
err |= __put_user(SIGINFO_EXTRA_V8PLUS_MAGIC, &sf->v8plus.g_upper[0]);
|
| 1175 |
|
|
for (i = 1; i < 16; i++)
|
| 1176 |
|
|
err |= __put_user(((u32 *)regs->u_regs)[2*i], &sf->v8plus.g_upper[i]);
|
| 1177 |
|
|
|
| 1178 |
|
|
if (psr & PSR_EF) {
|
| 1179 |
|
|
err |= save_fpu_state32(regs, &sf->fpu_state);
|
| 1180 |
|
|
err |= __put_user((u64)&sf->fpu_state, &sf->fpu_save);
|
| 1181 |
|
|
} else {
|
| 1182 |
|
|
err |= __put_user(0, &sf->fpu_save);
|
| 1183 |
|
|
}
|
| 1184 |
|
|
|
| 1185 |
|
|
/* Update the siginfo structure. */
|
| 1186 |
|
|
err |= copy_siginfo_to_user32(&sf->info, info);
|
| 1187 |
|
|
|
| 1188 |
|
|
/* Setup sigaltstack */
|
| 1189 |
|
|
err |= __put_user(current->sas_ss_sp, &sf->stack.ss_sp);
|
| 1190 |
|
|
err |= __put_user(sas_ss_flags(regs->u_regs[UREG_FP]), &sf->stack.ss_flags);
|
| 1191 |
|
|
err |= __put_user(current->sas_ss_size, &sf->stack.ss_size);
|
| 1192 |
|
|
|
| 1193 |
|
|
switch (_NSIG_WORDS) {
|
| 1194 |
|
|
case 4: seta.sig[7] = (oldset->sig[3] >> 32);
|
| 1195 |
|
|
seta.sig[6] = oldset->sig[3];
|
| 1196 |
|
|
case 3: seta.sig[5] = (oldset->sig[2] >> 32);
|
| 1197 |
|
|
seta.sig[4] = oldset->sig[2];
|
| 1198 |
|
|
case 2: seta.sig[3] = (oldset->sig[1] >> 32);
|
| 1199 |
|
|
seta.sig[2] = oldset->sig[1];
|
| 1200 |
|
|
case 1: seta.sig[1] = (oldset->sig[0] >> 32);
|
| 1201 |
|
|
seta.sig[0] = oldset->sig[0];
|
| 1202 |
|
|
}
|
| 1203 |
|
|
err |= __copy_to_user(&sf->mask, &seta, sizeof(sigset_t32));
|
| 1204 |
|
|
|
| 1205 |
|
|
err |= copy_in_user((u32 *)sf,
|
| 1206 |
|
|
(u32 *)(regs->u_regs[UREG_FP]),
|
| 1207 |
|
|
sizeof(struct reg_window32));
|
| 1208 |
|
|
if (err)
|
| 1209 |
|
|
goto sigsegv;
|
| 1210 |
|
|
|
| 1211 |
|
|
/* 3. signal handler back-trampoline and parameters */
|
| 1212 |
|
|
regs->u_regs[UREG_FP] = (unsigned long) sf;
|
| 1213 |
|
|
regs->u_regs[UREG_I0] = signr;
|
| 1214 |
|
|
regs->u_regs[UREG_I1] = (unsigned long) &sf->info;
|
| 1215 |
|
|
regs->u_regs[UREG_I2] = (unsigned long) &sf->regs;
|
| 1216 |
|
|
|
| 1217 |
|
|
/* 4. signal handler */
|
| 1218 |
|
|
regs->tpc = (unsigned long) ka->sa.sa_handler;
|
| 1219 |
|
|
regs->tnpc = (regs->tpc + 4);
|
| 1220 |
|
|
if ((current->thread.flags & SPARC_FLAG_32BIT) != 0) {
|
| 1221 |
|
|
regs->tpc &= 0xffffffff;
|
| 1222 |
|
|
regs->tnpc &= 0xffffffff;
|
| 1223 |
|
|
}
|
| 1224 |
|
|
|
| 1225 |
|
|
/* 5. return to kernel instructions */
|
| 1226 |
|
|
if (ka->ka_restorer)
|
| 1227 |
|
|
regs->u_regs[UREG_I7] = (unsigned long)ka->ka_restorer;
|
| 1228 |
|
|
else {
|
| 1229 |
|
|
/* Flush instruction space. */
|
| 1230 |
|
|
unsigned long address = ((unsigned long)&(sf->insns[0]));
|
| 1231 |
|
|
pgd_t *pgdp = pgd_offset(current->mm, address);
|
| 1232 |
|
|
pmd_t *pmdp = pmd_offset(pgdp, address);
|
| 1233 |
|
|
pte_t *ptep = pte_offset(pmdp, address);
|
| 1234 |
|
|
|
| 1235 |
|
|
regs->u_regs[UREG_I7] = (unsigned long) (&(sf->insns[0]) - 2);
|
| 1236 |
|
|
|
| 1237 |
|
|
/* mov __NR_rt_sigreturn, %g1 */
|
| 1238 |
|
|
err |= __put_user(0x82102065, &sf->insns[0]);
|
| 1239 |
|
|
|
| 1240 |
|
|
/* t 0x10 */
|
| 1241 |
|
|
err |= __put_user(0x91d02010, &sf->insns[1]);
|
| 1242 |
|
|
if (err)
|
| 1243 |
|
|
goto sigsegv;
|
| 1244 |
|
|
|
| 1245 |
|
|
if(pte_present(*ptep)) {
|
| 1246 |
|
|
unsigned long page = (unsigned long) page_address(pte_page(*ptep));
|
| 1247 |
|
|
|
| 1248 |
|
|
__asm__ __volatile__(
|
| 1249 |
|
|
" membar #StoreStore\n"
|
| 1250 |
|
|
" flush %0 + %1"
|
| 1251 |
|
|
: : "r" (page), "r" (address & (PAGE_SIZE - 1))
|
| 1252 |
|
|
: "memory");
|
| 1253 |
|
|
}
|
| 1254 |
|
|
}
|
| 1255 |
|
|
return;
|
| 1256 |
|
|
|
| 1257 |
|
|
sigill:
|
| 1258 |
|
|
do_exit(SIGILL);
|
| 1259 |
|
|
sigsegv:
|
| 1260 |
|
|
do_exit(SIGSEGV);
|
| 1261 |
|
|
}
|
| 1262 |
|
|
|
| 1263 |
|
|
static inline void handle_signal32(unsigned long signr, struct k_sigaction *ka,
|
| 1264 |
|
|
siginfo_t *info,
|
| 1265 |
|
|
sigset_t *oldset, struct pt_regs *regs,
|
| 1266 |
|
|
int svr4_signal)
|
| 1267 |
|
|
{
|
| 1268 |
|
|
if(svr4_signal)
|
| 1269 |
|
|
setup_svr4_frame32(&ka->sa, regs->tpc, regs->tnpc, regs, signr, oldset);
|
| 1270 |
|
|
else {
|
| 1271 |
|
|
if (ka->sa.sa_flags & SA_SIGINFO)
|
| 1272 |
|
|
setup_rt_frame32(ka, regs, signr, oldset, info);
|
| 1273 |
|
|
else if (current->thread.flags & SPARC_FLAG_NEWSIGNALS)
|
| 1274 |
|
|
new_setup_frame32(ka, regs, signr, oldset);
|
| 1275 |
|
|
else
|
| 1276 |
|
|
setup_frame32(&ka->sa, regs, signr, oldset, info);
|
| 1277 |
|
|
}
|
| 1278 |
|
|
if(ka->sa.sa_flags & SA_ONESHOT)
|
| 1279 |
|
|
ka->sa.sa_handler = SIG_DFL;
|
| 1280 |
|
|
if(!(ka->sa.sa_flags & SA_NOMASK)) {
|
| 1281 |
|
|
spin_lock_irq(¤t->sigmask_lock);
|
| 1282 |
|
|
sigorsets(¤t->blocked,¤t->blocked,&ka->sa.sa_mask);
|
| 1283 |
|
|
sigaddset(¤t->blocked,signr);
|
| 1284 |
|
|
recalc_sigpending(current);
|
| 1285 |
|
|
spin_unlock_irq(¤t->sigmask_lock);
|
| 1286 |
|
|
}
|
| 1287 |
|
|
}
|
| 1288 |
|
|
|
| 1289 |
|
|
static inline void syscall_restart32(unsigned long orig_i0, struct pt_regs *regs,
|
| 1290 |
|
|
struct sigaction *sa)
|
| 1291 |
|
|
{
|
| 1292 |
|
|
switch(regs->u_regs[UREG_I0]) {
|
| 1293 |
|
|
case ERESTARTNOHAND:
|
| 1294 |
|
|
no_system_call_restart:
|
| 1295 |
|
|
regs->u_regs[UREG_I0] = EINTR;
|
| 1296 |
|
|
regs->tstate |= TSTATE_ICARRY;
|
| 1297 |
|
|
break;
|
| 1298 |
|
|
case ERESTARTSYS:
|
| 1299 |
|
|
if(!(sa->sa_flags & SA_RESTART))
|
| 1300 |
|
|
goto no_system_call_restart;
|
| 1301 |
|
|
/* fallthrough */
|
| 1302 |
|
|
case ERESTARTNOINTR:
|
| 1303 |
|
|
regs->u_regs[UREG_I0] = orig_i0;
|
| 1304 |
|
|
regs->tpc -= 4;
|
| 1305 |
|
|
regs->tnpc -= 4;
|
| 1306 |
|
|
}
|
| 1307 |
|
|
}
|
| 1308 |
|
|
|
| 1309 |
|
|
#ifdef DEBUG_SIGNALS_MAPS
|
| 1310 |
|
|
|
| 1311 |
|
|
#define MAPS_LINE_FORMAT "%016lx-%016lx %s %016lx %s %lu "
|
| 1312 |
|
|
|
| 1313 |
|
|
static inline void read_maps (void)
|
| 1314 |
|
|
{
|
| 1315 |
|
|
struct vm_area_struct * map, * next;
|
| 1316 |
|
|
char * buffer;
|
| 1317 |
|
|
ssize_t i;
|
| 1318 |
|
|
|
| 1319 |
|
|
buffer = (char*)__get_free_page(GFP_KERNEL);
|
| 1320 |
|
|
if (!buffer)
|
| 1321 |
|
|
return;
|
| 1322 |
|
|
|
| 1323 |
|
|
for (map = current->mm->mmap ; map ; map = next ) {
|
| 1324 |
|
|
/* produce the next line */
|
| 1325 |
|
|
char *line;
|
| 1326 |
|
|
char str[5], *cp = str;
|
| 1327 |
|
|
int flags;
|
| 1328 |
|
|
kdev_t dev;
|
| 1329 |
|
|
unsigned long ino;
|
| 1330 |
|
|
|
| 1331 |
|
|
/*
|
| 1332 |
|
|
* Get the next vma now (but it won't be used if we sleep).
|
| 1333 |
|
|
*/
|
| 1334 |
|
|
next = map->vm_next;
|
| 1335 |
|
|
flags = map->vm_flags;
|
| 1336 |
|
|
|
| 1337 |
|
|
*cp++ = flags & VM_READ ? 'r' : '-';
|
| 1338 |
|
|
*cp++ = flags & VM_WRITE ? 'w' : '-';
|
| 1339 |
|
|
*cp++ = flags & VM_EXEC ? 'x' : '-';
|
| 1340 |
|
|
*cp++ = flags & VM_MAYSHARE ? 's' : 'p';
|
| 1341 |
|
|
*cp++ = 0;
|
| 1342 |
|
|
|
| 1343 |
|
|
dev = 0;
|
| 1344 |
|
|
ino = 0;
|
| 1345 |
|
|
if (map->vm_file != NULL) {
|
| 1346 |
|
|
dev = map->vm_file->f_dentry->d_inode->i_dev;
|
| 1347 |
|
|
ino = map->vm_file->f_dentry->d_inode->i_ino;
|
| 1348 |
|
|
line = d_path(map->vm_file->f_dentry,
|
| 1349 |
|
|
map->vm_file->f_vfsmnt,
|
| 1350 |
|
|
buffer, PAGE_SIZE);
|
| 1351 |
|
|
if (IS_ERR(line))
|
| 1352 |
|
|
break;
|
| 1353 |
|
|
}
|
| 1354 |
|
|
printk(MAPS_LINE_FORMAT, map->vm_start, map->vm_end, str, map->vm_pgoff << PAGE_SHIFT,
|
| 1355 |
|
|
kdevname(dev), ino);
|
| 1356 |
|
|
if (map->vm_file != NULL)
|
| 1357 |
|
|
printk("%s\n", line);
|
| 1358 |
|
|
else
|
| 1359 |
|
|
printk("\n");
|
| 1360 |
|
|
}
|
| 1361 |
|
|
free_page((unsigned long)buffer);
|
| 1362 |
|
|
return;
|
| 1363 |
|
|
}
|
| 1364 |
|
|
|
| 1365 |
|
|
#endif
|
| 1366 |
|
|
|
| 1367 |
|
|
/* Note that 'init' is a special process: it doesn't get signals it doesn't
|
| 1368 |
|
|
* want to handle. Thus you cannot kill init even with a SIGKILL even by
|
| 1369 |
|
|
* mistake.
|
| 1370 |
|
|
*/
|
| 1371 |
|
|
asmlinkage int do_signal32(sigset_t *oldset, struct pt_regs * regs,
|
| 1372 |
|
|
unsigned long orig_i0, int restart_syscall)
|
| 1373 |
|
|
{
|
| 1374 |
|
|
unsigned long signr;
|
| 1375 |
|
|
struct k_sigaction *ka;
|
| 1376 |
|
|
siginfo_t info;
|
| 1377 |
|
|
|
| 1378 |
|
|
int svr4_signal = current->personality == PER_SVR4;
|
| 1379 |
|
|
|
| 1380 |
|
|
for (;;) {
|
| 1381 |
|
|
spin_lock_irq(¤t->sigmask_lock);
|
| 1382 |
|
|
signr = dequeue_signal(¤t->blocked, &info);
|
| 1383 |
|
|
spin_unlock_irq(¤t->sigmask_lock);
|
| 1384 |
|
|
|
| 1385 |
|
|
if (!signr)
|
| 1386 |
|
|
break;
|
| 1387 |
|
|
|
| 1388 |
|
|
if ((current->ptrace & PT_PTRACED) && signr != SIGKILL) {
|
| 1389 |
|
|
/* Do the syscall restart before we let the debugger
|
| 1390 |
|
|
* look at the child registers.
|
| 1391 |
|
|
*/
|
| 1392 |
|
|
if (restart_syscall &&
|
| 1393 |
|
|
(regs->u_regs[UREG_I0] == ERESTARTNOHAND ||
|
| 1394 |
|
|
regs->u_regs[UREG_I0] == ERESTARTSYS ||
|
| 1395 |
|
|
regs->u_regs[UREG_I0] == ERESTARTNOINTR)) {
|
| 1396 |
|
|
regs->u_regs[UREG_I0] = orig_i0;
|
| 1397 |
|
|
regs->tpc -= 4;
|
| 1398 |
|
|
regs->tnpc -= 4;
|
| 1399 |
|
|
restart_syscall = 0;
|
| 1400 |
|
|
}
|
| 1401 |
|
|
|
| 1402 |
|
|
current->exit_code = signr;
|
| 1403 |
|
|
current->state = TASK_STOPPED;
|
| 1404 |
|
|
notify_parent(current, SIGCHLD);
|
| 1405 |
|
|
schedule();
|
| 1406 |
|
|
if (!(signr = current->exit_code))
|
| 1407 |
|
|
continue;
|
| 1408 |
|
|
current->exit_code = 0;
|
| 1409 |
|
|
if (signr == SIGSTOP)
|
| 1410 |
|
|
continue;
|
| 1411 |
|
|
|
| 1412 |
|
|
/* Update the siginfo structure. Is this good? */
|
| 1413 |
|
|
if (signr != info.si_signo) {
|
| 1414 |
|
|
info.si_signo = signr;
|
| 1415 |
|
|
info.si_errno = 0;
|
| 1416 |
|
|
info.si_code = SI_USER;
|
| 1417 |
|
|
info.si_pid = current->p_pptr->pid;
|
| 1418 |
|
|
info.si_uid = current->p_pptr->uid;
|
| 1419 |
|
|
}
|
| 1420 |
|
|
|
| 1421 |
|
|
/* If the (new) signal is now blocked, requeue it. */
|
| 1422 |
|
|
if (sigismember(¤t->blocked, signr)) {
|
| 1423 |
|
|
send_sig_info(signr, &info, current);
|
| 1424 |
|
|
continue;
|
| 1425 |
|
|
}
|
| 1426 |
|
|
}
|
| 1427 |
|
|
|
| 1428 |
|
|
ka = ¤t->sig->action[signr-1];
|
| 1429 |
|
|
|
| 1430 |
|
|
if (ka->sa.sa_handler == SIG_IGN) {
|
| 1431 |
|
|
if (signr != SIGCHLD)
|
| 1432 |
|
|
continue;
|
| 1433 |
|
|
|
| 1434 |
|
|
/* sys_wait4() grabs the master kernel lock, so
|
| 1435 |
|
|
* we need not do so, that sucker should be
|
| 1436 |
|
|
* threaded and would not be that difficult to
|
| 1437 |
|
|
* do anyways.
|
| 1438 |
|
|
*/
|
| 1439 |
|
|
while (sys_wait4(-1, NULL, WNOHANG, NULL) > 0)
|
| 1440 |
|
|
;
|
| 1441 |
|
|
continue;
|
| 1442 |
|
|
}
|
| 1443 |
|
|
if (ka->sa.sa_handler == SIG_DFL) {
|
| 1444 |
|
|
unsigned long exit_code = signr;
|
| 1445 |
|
|
|
| 1446 |
|
|
if (current->pid == 1)
|
| 1447 |
|
|
continue;
|
| 1448 |
|
|
switch (signr) {
|
| 1449 |
|
|
case SIGCONT: case SIGCHLD: case SIGWINCH: case SIGURG:
|
| 1450 |
|
|
continue;
|
| 1451 |
|
|
|
| 1452 |
|
|
case SIGTSTP: case SIGTTIN: case SIGTTOU:
|
| 1453 |
|
|
if (is_orphaned_pgrp(current->pgrp))
|
| 1454 |
|
|
continue;
|
| 1455 |
|
|
|
| 1456 |
|
|
case SIGSTOP:
|
| 1457 |
|
|
if (current->ptrace & PT_PTRACED)
|
| 1458 |
|
|
continue;
|
| 1459 |
|
|
current->state = TASK_STOPPED;
|
| 1460 |
|
|
current->exit_code = signr;
|
| 1461 |
|
|
if (!(current->p_pptr->sig->action[SIGCHLD-1].sa.sa_flags &
|
| 1462 |
|
|
SA_NOCLDSTOP))
|
| 1463 |
|
|
notify_parent(current, SIGCHLD);
|
| 1464 |
|
|
schedule();
|
| 1465 |
|
|
continue;
|
| 1466 |
|
|
|
| 1467 |
|
|
case SIGQUIT: case SIGILL: case SIGTRAP:
|
| 1468 |
|
|
case SIGABRT: case SIGFPE: case SIGSEGV:
|
| 1469 |
|
|
case SIGBUS: case SIGSYS: case SIGXCPU: case SIGXFSZ:
|
| 1470 |
|
|
if (do_coredump(signr, regs))
|
| 1471 |
|
|
exit_code |= 0x80;
|
| 1472 |
|
|
#ifdef DEBUG_SIGNALS
|
| 1473 |
|
|
/* Very useful to debug dynamic linker problems */
|
| 1474 |
|
|
printk ("Sig %ld going for %s[%d]...\n", signr, current->comm, current->pid);
|
| 1475 |
|
|
/* On SMP we are only interested in the current
|
| 1476 |
|
|
* CPU's registers.
|
| 1477 |
|
|
*/
|
| 1478 |
|
|
__show_regs (regs);
|
| 1479 |
|
|
#ifdef DEBUG_SIGNALS_TLB
|
| 1480 |
|
|
do {
|
| 1481 |
|
|
extern void sparc_ultra_dump_itlb(void);
|
| 1482 |
|
|
extern void sparc_ultra_dump_dtlb(void);
|
| 1483 |
|
|
sparc_ultra_dump_dtlb();
|
| 1484 |
|
|
sparc_ultra_dump_itlb();
|
| 1485 |
|
|
} while(0);
|
| 1486 |
|
|
#endif
|
| 1487 |
|
|
#ifdef DEBUG_SIGNALS_TRACE
|
| 1488 |
|
|
{
|
| 1489 |
|
|
struct reg_window32 *rw = (struct reg_window32 *)(regs->u_regs[UREG_FP] & 0xffffffff);
|
| 1490 |
|
|
unsigned int ins[8];
|
| 1491 |
|
|
|
| 1492 |
|
|
while (rw &&
|
| 1493 |
|
|
!(((unsigned long) rw) & 0x3)) {
|
| 1494 |
|
|
copy_from_user(ins, &rw->ins[0], sizeof(ins));
|
| 1495 |
|
|
printk("Caller[%08x](%08x,%08x,%08x,%08x,%08x,%08x)\n", ins[7], ins[0], ins[1], ins[2], ins[3], ins[4], ins[5]);
|
| 1496 |
|
|
rw = (struct reg_window32 *)(unsigned long)ins[6];
|
| 1497 |
|
|
}
|
| 1498 |
|
|
}
|
| 1499 |
|
|
#endif
|
| 1500 |
|
|
#ifdef DEBUG_SIGNALS_MAPS
|
| 1501 |
|
|
printk("Maps:\n");
|
| 1502 |
|
|
read_maps();
|
| 1503 |
|
|
#endif
|
| 1504 |
|
|
#endif
|
| 1505 |
|
|
/* fall through */
|
| 1506 |
|
|
default:
|
| 1507 |
|
|
sig_exit(signr, exit_code, &info);
|
| 1508 |
|
|
/* NOT REACHED */
|
| 1509 |
|
|
}
|
| 1510 |
|
|
}
|
| 1511 |
|
|
if (restart_syscall)
|
| 1512 |
|
|
syscall_restart32(orig_i0, regs, &ka->sa);
|
| 1513 |
|
|
handle_signal32(signr, ka, &info, oldset, regs, svr4_signal);
|
| 1514 |
|
|
return 1;
|
| 1515 |
|
|
}
|
| 1516 |
|
|
if (restart_syscall &&
|
| 1517 |
|
|
(regs->u_regs[UREG_I0] == ERESTARTNOHAND ||
|
| 1518 |
|
|
regs->u_regs[UREG_I0] == ERESTARTSYS ||
|
| 1519 |
|
|
regs->u_regs[UREG_I0] == ERESTARTNOINTR)) {
|
| 1520 |
|
|
/* replay the system call when we are done */
|
| 1521 |
|
|
regs->u_regs[UREG_I0] = orig_i0;
|
| 1522 |
|
|
regs->tpc -= 4;
|
| 1523 |
|
|
regs->tnpc -= 4;
|
| 1524 |
|
|
}
|
| 1525 |
|
|
return 0;
|
| 1526 |
|
|
}
|
| 1527 |
|
|
|
| 1528 |
|
|
struct sigstack32 {
|
| 1529 |
|
|
u32 the_stack;
|
| 1530 |
|
|
int cur_status;
|
| 1531 |
|
|
};
|
| 1532 |
|
|
|
| 1533 |
|
|
asmlinkage int do_sys32_sigstack(u32 u_ssptr, u32 u_ossptr, unsigned long sp)
|
| 1534 |
|
|
{
|
| 1535 |
|
|
struct sigstack32 *ssptr = (struct sigstack32 *)((unsigned long)(u_ssptr));
|
| 1536 |
|
|
struct sigstack32 *ossptr = (struct sigstack32 *)((unsigned long)(u_ossptr));
|
| 1537 |
|
|
int ret = -EFAULT;
|
| 1538 |
|
|
|
| 1539 |
|
|
/* First see if old state is wanted. */
|
| 1540 |
|
|
if (ossptr) {
|
| 1541 |
|
|
if (put_user(current->sas_ss_sp + current->sas_ss_size, &ossptr->the_stack) ||
|
| 1542 |
|
|
__put_user(on_sig_stack(sp), &ossptr->cur_status))
|
| 1543 |
|
|
goto out;
|
| 1544 |
|
|
}
|
| 1545 |
|
|
|
| 1546 |
|
|
/* Now see if we want to update the new state. */
|
| 1547 |
|
|
if (ssptr) {
|
| 1548 |
|
|
void *ss_sp;
|
| 1549 |
|
|
|
| 1550 |
|
|
if (get_user((long)ss_sp, &ssptr->the_stack))
|
| 1551 |
|
|
goto out;
|
| 1552 |
|
|
/* If the current stack was set with sigaltstack, don't
|
| 1553 |
|
|
swap stacks while we are on it. */
|
| 1554 |
|
|
ret = -EPERM;
|
| 1555 |
|
|
if (current->sas_ss_sp && on_sig_stack(sp))
|
| 1556 |
|
|
goto out;
|
| 1557 |
|
|
|
| 1558 |
|
|
/* Since we don't know the extent of the stack, and we don't
|
| 1559 |
|
|
track onstack-ness, but rather calculate it, we must
|
| 1560 |
|
|
presume a size. Ho hum this interface is lossy. */
|
| 1561 |
|
|
current->sas_ss_sp = (unsigned long)ss_sp - SIGSTKSZ;
|
| 1562 |
|
|
current->sas_ss_size = SIGSTKSZ;
|
| 1563 |
|
|
}
|
| 1564 |
|
|
|
| 1565 |
|
|
ret = 0;
|
| 1566 |
|
|
out:
|
| 1567 |
|
|
return ret;
|
| 1568 |
|
|
}
|
| 1569 |
|
|
|
| 1570 |
|
|
asmlinkage int do_sys32_sigaltstack(u32 ussa, u32 uossa, unsigned long sp)
|
| 1571 |
|
|
{
|
| 1572 |
|
|
stack_t uss, uoss;
|
| 1573 |
|
|
int ret;
|
| 1574 |
|
|
mm_segment_t old_fs;
|
| 1575 |
|
|
|
| 1576 |
|
|
if (ussa && (get_user((long)uss.ss_sp, &((stack_t32 *)(long)ussa)->ss_sp) ||
|
| 1577 |
|
|
__get_user(uss.ss_flags, &((stack_t32 *)(long)ussa)->ss_flags) ||
|
| 1578 |
|
|
__get_user(uss.ss_size, &((stack_t32 *)(long)ussa)->ss_size)))
|
| 1579 |
|
|
return -EFAULT;
|
| 1580 |
|
|
old_fs = get_fs();
|
| 1581 |
|
|
set_fs(KERNEL_DS);
|
| 1582 |
|
|
ret = do_sigaltstack(ussa ? &uss : NULL, uossa ? &uoss : NULL, sp);
|
| 1583 |
|
|
set_fs(old_fs);
|
| 1584 |
|
|
if (!ret && uossa && (put_user((long)uoss.ss_sp, &((stack_t32 *)(long)uossa)->ss_sp) ||
|
| 1585 |
|
|
__put_user(uoss.ss_flags, &((stack_t32 *)(long)uossa)->ss_flags) ||
|
| 1586 |
|
|
__put_user(uoss.ss_size, &((stack_t32 *)(long)uossa)->ss_size)))
|
| 1587 |
|
|
return -EFAULT;
|
| 1588 |
|
|
return ret;
|
| 1589 |
|
|
}
|
