C++ (Cpp) dump_irix5_sigctx Examples

Example #1

File: irixsig.c Project: ForayJones/iods

static int setup_irix_frame(struct k_sigaction *ka, struct pt_regs *regs,
			    int signr, sigset_t *oldmask)
{
	struct sigctx_irix5 __user *ctx;
	unsigned long sp;
	int error, i;

	sp = regs->regs[29];
	sp -= sizeof(struct sigctx_irix5);
	sp &= ~(0xf);
	ctx = (struct sigctx_irix5 __user *) sp;
	if (!access_ok(VERIFY_WRITE, ctx, sizeof(*ctx)))
		goto segv_and_exit;

	error = __put_user(0, &ctx->weird_fpu_thing);
	error |= __put_user(~(0x00000001), &ctx->rmask);
	error |= __put_user(0, &ctx->regs[0]);
	for(i = 1; i < 32; i++)
		error |= __put_user((u64) regs->regs[i], &ctx->regs[i]);

	error |= __put_user((u64) regs->hi, &ctx->hi);
	error |= __put_user((u64) regs->lo, &ctx->lo);
	error |= __put_user((u64) regs->cp0_epc, &ctx->pc);
	error |= __put_user(!!used_math(), &ctx->usedfp);
	error |= __put_user((u64) regs->cp0_cause, &ctx->cp0_cause);
	error |= __put_user((u64) regs->cp0_badvaddr, &ctx->cp0_badvaddr);

	error |= __put_user(0, &ctx->sstk_flags); /* XXX sigstack unimp... todo... */

	error |= __copy_to_user(&ctx->sigset, oldmask, sizeof(irix_sigset_t)) ? -EFAULT : 0;

	if (error)
		goto segv_and_exit;

#ifdef DEBUG_SIG
	dump_irix5_sigctx(ctx);
#endif

	regs->regs[4] = (unsigned long) signr;
	regs->regs[5] = 0; /* XXX sigcode XXX */
	regs->regs[6] = regs->regs[29] = sp;
	regs->regs[7] = (unsigned long) ka->sa.sa_handler;
	regs->regs[25] = regs->cp0_epc = (unsigned long) ka->sa_restorer;

	return 1;

segv_and_exit:
	force_sigsegv(signr, current);
	return 0;
}

Example #2

File: irixsig.c Project: Brainiarc7/ralink_sdk

static void setup_irix_frame(struct k_sigaction *ka, struct pt_regs *regs,
			     int signr, sigset_t *oldmask)
{
	unsigned long sp;
	struct sigctx_irix5 *ctx;
	int i;

	sp = regs->regs[29];
	sp -= sizeof(struct sigctx_irix5);
	sp &= ~(0xf);
	ctx = (struct sigctx_irix5 *) sp;
	if (!access_ok(VERIFY_WRITE, ctx, sizeof(*ctx)))
		goto segv_and_exit;

	__put_user(0, &ctx->weird_fpu_thing);
	__put_user(~(0x00000001), &ctx->rmask);
	__put_user(0, &ctx->regs[0]);
	for(i = 1; i < 32; i++)
		__put_user((u64) regs->regs[i], &ctx->regs[i]);

	__put_user((u64) regs->hi, &ctx->hi);
	__put_user((u64) regs->lo, &ctx->lo);
	__put_user((u64) regs->cp0_epc, &ctx->pc);
	__put_user(current->used_math, &ctx->usedfp);
	__put_user((u64) regs->cp0_cause, &ctx->cp0_cause);
	__put_user((u64) regs->cp0_badvaddr, &ctx->cp0_badvaddr);

	__put_user(0, &ctx->sstk_flags); /* XXX sigstack unimp... todo... */

	__copy_to_user(&ctx->sigset, oldmask, sizeof(irix_sigset_t));

#ifdef DEBUG_SIG
	dump_irix5_sigctx(ctx);
#endif

	regs->regs[4] = (unsigned long) signr;
	regs->regs[5] = 0; /* XXX sigcode XXX */
	regs->regs[6] = regs->regs[29] = sp;
	regs->regs[7] = (unsigned long) ka->sa.sa_handler;
	regs->regs[25] = regs->cp0_epc = (unsigned long) ka->sa_restorer;

	return;

segv_and_exit:
	if (signr == SIGSEGV)
		ka->sa.sa_handler = SIG_DFL;
	force_sig(SIGSEGV, current);
}

Example #3

File: irixsig.c Project: OpenHMR/Open-HMR600

asmlinkage void
irix_sigreturn(struct pt_regs *regs)
{
	struct sigctx_irix5 __user *context, *magic;
	unsigned long umask, mask;
	u64 *fregs;
	u32 usedfp;
	int error, sig, i, base = 0;
	sigset_t blocked;

	/* Always make any pending restarted system calls return -EINTR */
	current_thread_info()->restart_block.fn = do_no_restart_syscall;

	if (regs->regs[2] == 1000)
		base = 1;

	context = (struct sigctx_irix5 __user *) regs->regs[base + 4];
	magic = (struct sigctx_irix5 __user *) regs->regs[base + 5];
	sig = (int) regs->regs[base + 6];
#ifdef DEBUG_SIG
	printk("[%s:%d] IRIX sigreturn(scp[%p],ucp[%p],sig[%d])\n",
	       current->comm, current->pid, context, magic, sig);
#endif
	if (!context)
		context = magic;
	if (!access_ok(VERIFY_READ, context, sizeof(struct sigctx_irix5)))
		goto badframe;

#ifdef DEBUG_SIG
	dump_irix5_sigctx(context);
#endif

	error = __get_user(regs->cp0_epc, &context->pc);
	error |= __get_user(umask, &context->rmask);

	mask = 2;
	for (i = 1; i < 32; i++, mask <<= 1) {
		if (umask & mask)
			error |= __get_user(regs->regs[i], &context->regs[i]);
	}
	error |= __get_user(regs->hi, &context->hi);
	error |= __get_user(regs->lo, &context->lo);

	error |= __get_user(usedfp, &context->usedfp);
	if ((umask & 1) && usedfp) {
		fregs = (u64 *) &current->thread.fpu;

		for(i = 0; i < 32; i++)
			error |= __get_user(fregs[i], &context->fpregs[i]);
		error |= __get_user(current->thread.fpu.hard.fcr31, &context->fpcsr);
	}

	/* XXX do sigstack crapola here... XXX */

	error |= __copy_from_user(&blocked, &context->sigset, sizeof(blocked)) ? -EFAULT : 0;

	if (error)
		goto badframe;

	sigdelsetmask(&blocked, ~_BLOCKABLE);
	spin_lock_irq(&current->sighand->siglock);
	current->blocked = blocked;
	recalc_sigpending();
	spin_unlock_irq(&current->sighand->siglock);

	/*
	 * Don't let your children do this ...
	 */
	if (current_thread_info()->flags & TIF_SYSCALL_TRACE)
		do_syscall_trace(regs, 1);
	__asm__ __volatile__(
		"move\t$29,%0\n\t"
		"j\tsyscall_exit"
		:/* no outputs */
		:"r" (&regs));
		/* Unreached */

badframe:
	force_sig(SIGSEGV, current);
}

Example #4

File: irixsig.c Project: Brainiarc7/ralink_sdk

asmlinkage void
irix_sigreturn(struct pt_regs *regs)
{
	struct sigctx_irix5 *context, *magic;
	unsigned long umask, mask;
	u64 *fregs;
	int sig, i, base = 0;
	sigset_t blocked;

	if(regs->regs[2] == 1000)
		base = 1;

	context = (struct sigctx_irix5 *) regs->regs[base + 4];
	magic = (struct sigctx_irix5 *) regs->regs[base + 5];
	sig = (int) regs->regs[base + 6];
#ifdef DEBUG_SIG
	printk("[%s:%d] IRIX sigreturn(scp[%p],ucp[%p],sig[%d])\n",
	       current->comm, current->pid, context, magic, sig);
#endif
	if (!context)
		context = magic;
	if (!access_ok(VERIFY_READ, context, sizeof(struct sigctx_irix5)))
		goto badframe;

#ifdef DEBUG_SIG
	dump_irix5_sigctx(context);
#endif

	__get_user(regs->cp0_epc, &context->pc);
	umask = context->rmask; mask = 2;
	for (i = 1; i < 32; i++, mask <<= 1) {
		if(umask & mask)
			__get_user(regs->regs[i], &context->regs[i]);
	}
	__get_user(regs->hi, &context->hi);
	__get_user(regs->lo, &context->lo);

	if ((umask & 1) && context->usedfp) {
		fregs = (u64 *) &current->thread.fpu;
		for(i = 0; i < 32; i++)
			fregs[i] = (u64) context->fpregs[i];
		__get_user(current->thread.fpu.hard.control, &context->fpcsr);
	}

	/* XXX do sigstack crapola here... XXX */

	if (__copy_from_user(&blocked, &context->sigset, sizeof(blocked)))
		goto badframe;

	sigdelsetmask(&blocked, ~_BLOCKABLE);
	spin_lock_irq(&current->sigmask_lock);
	current->blocked = blocked;
	recalc_sigpending(current);
	spin_unlock_irq(&current->sigmask_lock);

	/*
	 * Don't let your children do this ...
	 */
	if (current->ptrace & PT_TRACESYS)
		syscall_trace();
	__asm__ __volatile__(
		"move\t$29,%0\n\t"
		"j\tret_from_sys_call"
		:/* no outputs */
		:"r" (&regs));
		/* Unreached */

badframe:
	force_sig(SIGSEGV, current);
}