C++ (Cpp) is_32bit_task示例

示例#1

文件： signal.c 项目： Blackburn29/PsycoKernel

static int do_signal(struct pt_regs *regs)
{
	sigset_t *oldset;
	siginfo_t info;
	int signr;
	struct k_sigaction ka;
	int ret;
	int is32 = is_32bit_task();

	if (current_thread_info()->local_flags & _TLF_RESTORE_SIGMASK)
		oldset = &current->saved_sigmask;
	else
		oldset = &current->blocked;

	signr = get_signal_to_deliver(&info, &ka, regs, NULL);

	
	check_syscall_restart(regs, &ka, signr > 0);

	if (signr <= 0) {
		struct thread_info *ti = current_thread_info();
		
		if (ti->local_flags & _TLF_RESTORE_SIGMASK) {
			ti->local_flags &= ~_TLF_RESTORE_SIGMASK;
			sigprocmask(SIG_SETMASK, &current->saved_sigmask, NULL);
		}
		regs->trap = 0;
		return 0;               
	}

#ifndef CONFIG_PPC_ADV_DEBUG_REGS
	if (current->thread.dabr)
		set_dabr(current->thread.dabr);
#endif
	
	thread_change_pc(current, regs);

	if (is32) {
        	if (ka.sa.sa_flags & SA_SIGINFO)
			ret = handle_rt_signal32(signr, &ka, &info, oldset,
					regs);
		else
			ret = handle_signal32(signr, &ka, &info, oldset,
					regs);
	} else {
		ret = handle_rt_signal64(signr, &ka, &info, oldset, regs);
	}

	regs->trap = 0;
	if (ret) {
		block_sigmask(&ka, signr);

		current_thread_info()->local_flags &= ~_TLF_RESTORE_SIGMASK;

		tracehook_signal_handler(signr, &info, &ka, regs,
					 test_thread_flag(TIF_SINGLESTEP));
	}

	return ret;
}

示例#2

文件： mmap.c 项目： CaptainThrowback/android_kernel_htc_pme

unsigned long arch_mmap_rnd(void)
{
	unsigned long rnd;

	/* 8MB for 32bit, 1GB for 64bit */
	if (is_32bit_task())
		rnd = (unsigned long)get_random_int() % (1<<(23-PAGE_SHIFT));
	else
		rnd = (unsigned long)get_random_int() % (1<<(30-PAGE_SHIFT));

	if (current->flags & PF_RANDOMIZE) {
		/* 8MB for 32bit, 1GB for 64bit */
		if (is_32bit_task())
			rnd = get_random_long() % (1<<(23-PAGE_SHIFT));
		else
			rnd = get_random_long() % (1UL<<(30-PAGE_SHIFT));
	}
	return rnd << PAGE_SHIFT;
}

示例#3

文件： signal.c 项目： DerDavid/linux

static int do_signal(struct pt_regs *regs)
{
	sigset_t *oldset = sigmask_to_save();
	siginfo_t info;
	int signr;
	struct k_sigaction ka;
	int ret;
	int is32 = is_32bit_task();

	signr = get_signal_to_deliver(&info, &ka, regs, NULL);

	/* Is there any syscall restart business here ? */
	check_syscall_restart(regs, &ka, signr > 0);

	if (signr <= 0) {
		/* No signal to deliver -- put the saved sigmask back */
		restore_saved_sigmask();
		regs->trap = 0;
		return 0;               /* no signals delivered */
	}

#ifndef CONFIG_PPC_ADV_DEBUG_REGS
        /*
	 * Reenable the DABR before delivering the signal to
	 * user space. The DABR will have been cleared if it
	 * triggered inside the kernel.
	 */
	if (current->thread.hw_brk.address &&
		current->thread.hw_brk.type)
		set_breakpoint(&current->thread.hw_brk);
#endif
	/* Re-enable the breakpoints for the signal stack */
	thread_change_pc(current, regs);

	if (is32) {
        	if (ka.sa.sa_flags & SA_SIGINFO)
			ret = handle_rt_signal32(signr, &ka, &info, oldset,
					regs);
		else
			ret = handle_signal32(signr, &ka, &info, oldset,
					regs);
	} else {
		ret = handle_rt_signal64(signr, &ka, &info, oldset, regs);
	}

	regs->trap = 0;
	if (ret) {
		signal_delivered(signr, &info, &ka, regs,
					 test_thread_flag(TIF_SINGLESTEP));
	}

	return ret;
}

示例#4

文件： mmap.c 项目： 0-T-0/ps4-linux

unsigned long arch_mmap_rnd(void)
{
	unsigned long rnd;

	/* 8MB for 32bit, 1GB for 64bit */
	if (is_32bit_task())
		rnd = (unsigned long)get_random_int() % (1<<(23-PAGE_SHIFT));
	else
		rnd = (unsigned long)get_random_int() % (1<<(30-PAGE_SHIFT));

	return rnd << PAGE_SHIFT;
}

示例#5

文件： mmap_64.c 项目： 325116067/semc-qsd8x50

/*
 * Since get_random_int() returns the same value within a 1 jiffy window,
 * we will almost always get the same randomisation for the stack and mmap
 * region. This will mean the relative distance between stack and mmap will
 * be the same.
 *
 * To avoid this we can shift the randomness by 1 bit.
 */
static unsigned long mmap_rnd(void)
{
	unsigned long rnd = 0;

	if (current->flags & PF_RANDOMIZE) {
		/* 8MB for 32bit, 1GB for 64bit */
		if (is_32bit_task())
			rnd = (long)(get_random_int() % (1<<(22-PAGE_SHIFT)));
		else
			rnd = (long)(get_random_int() % (1<<(29-PAGE_SHIFT)));
	}
	return (rnd << PAGE_SHIFT) * 2;
}

示例#6

文件： vma.c 项目： Xilinx/linux-xlnx

int arch_setup_additional_pages(struct linux_binprm *bprm, int uses_interp)
{

	if (!vdso_enabled)
		return 0;

#if defined CONFIG_COMPAT
	if (!(is_32bit_task()))
		return map_vdso(&vdso_image_64_builtin, &vdso_mapping64);
	else
		return map_vdso(&vdso_image_32_builtin, &vdso_mapping32);
#else
	return map_vdso(&vdso_image_64_builtin, &vdso_mapping64);
#endif

}

示例#7

文件： sys_parisc.c 项目： AbelHu/linux

static unsigned long mmap_rnd(void)
{
	unsigned long rnd = 0;

	/*
	*  8 bits of randomness in 32bit mmaps, 20 address space bits
	* 28 bits of randomness in 64bit mmaps, 40 address space bits
	*/
	if (current->flags & PF_RANDOMIZE) {
		if (is_32bit_task())
			rnd = get_random_int() % (1<<8);
		else
			rnd = get_random_int() % (1<<28);
	}
	return rnd << PAGE_SHIFT;
}

示例#8

文件： backtrace.c 项目： bjayesh/chandra

void op_powerpc_backtrace(struct pt_regs * const regs, unsigned int depth)
{
	unsigned long sp = regs->gpr[1];
	int first_frame = 1;

	/* We ditch the top stackframe so need to loop through an extra time */
	depth += 1;

	if (!user_mode(regs)) {
		while (depth--) {
			sp = kernel_getsp(sp, first_frame);
			if (!sp)
				break;
			first_frame = 0;
		}
	} else {
		pagefault_disable();
#ifdef CONFIG_PPC64
		if (!is_32bit_task()) {
			while (depth--) {
				sp = user_getsp64(sp, first_frame);
				if (!sp)
					break;
				first_frame = 0;
			}
			pagefault_enable();
			return;
		}
#endif

		while (depth--) {
			sp = user_getsp32(sp, first_frame);
			if (!sp)
				break;
			first_frame = 0;
		}
		pagefault_enable();
	}
}

示例#9

文件： signal.c 项目： mrtos/Logitech-Revue

int do_signal(sigset_t *oldset, struct pt_regs *regs)
{
    siginfo_t info;
    int signr;
    struct k_sigaction ka;
    int ret;
    int is32 = is_32bit_task();

    if (test_thread_flag(TIF_RESTORE_SIGMASK))
        oldset = &current->saved_sigmask;
    else if (!oldset)
        oldset = &current->blocked;

    signr = get_signal_to_deliver(&info, &ka, regs, NULL);

    /* Is there any syscall restart business here ? */
    check_syscall_restart(regs, &ka, signr > 0);

    if (signr <= 0) {
        /* No signal to deliver -- put the saved sigmask back */
        if (test_thread_flag(TIF_RESTORE_SIGMASK)) {
            clear_thread_flag(TIF_RESTORE_SIGMASK);
            sigprocmask(SIG_SETMASK, &current->saved_sigmask, NULL);
        }
        return 0;               /* no signals delivered */
    }

    /*
    * Reenable the DABR before delivering the signal to
     * user space. The DABR will have been cleared if it
     * triggered inside the kernel.
     */
    if (current->thread.dabr)
        set_dabr(current->thread.dabr);

    if (is32) {
        if (ka.sa.sa_flags & SA_SIGINFO)
            ret = handle_rt_signal32(signr, &ka, &info, oldset,
                                     regs);
        else
            ret = handle_signal32(signr, &ka, &info, oldset,
                                  regs);
    } else {
        ret = handle_rt_signal64(signr, &ka, &info, oldset, regs);
    }

    if (ret) {
        spin_lock_irq(&current->sighand->siglock);
        sigorsets(&current->blocked, &current->blocked,
                  &ka.sa.sa_mask);
        if (!(ka.sa.sa_flags & SA_NODEFER))
            sigaddset(&current->blocked, signr);
        recalc_sigpending();
        spin_unlock_irq(&current->sighand->siglock);

        /*
         * A signal was successfully delivered; the saved sigmask is in
         * its frame, and we can clear the TIF_RESTORE_SIGMASK flag.
         */
        if (test_thread_flag(TIF_RESTORE_SIGMASK))
            clear_thread_flag(TIF_RESTORE_SIGMASK);
    }

    return ret;
}

示例#10

static int do_signal_pending(sigset_t *oldset, struct pt_regs *regs)
{
	siginfo_t info;
	int signr;
	struct k_sigaction ka;
	int ret;
	int is32 = is_32bit_task();

#ifdef CONFIG_PREEMPT_RT
	/*
	 * Fully-preemptible kernel does not need interrupts disabled:
	 */
	local_irq_enable();
	preempt_check_resched();
#endif

	if (current_thread_info()->local_flags & _TLF_RESTORE_SIGMASK)
		oldset = &current->saved_sigmask;
	else if (!oldset)
		oldset = &current->blocked;

	signr = get_signal_to_deliver(&info, &ka, regs, NULL);

	/* Is there any syscall restart business here ? */
	check_syscall_restart(regs, &ka, signr > 0);

	if (signr <= 0) {
		struct thread_info *ti = current_thread_info();
		/* No signal to deliver -- put the saved sigmask back */
		if (ti->local_flags & _TLF_RESTORE_SIGMASK) {
			ti->local_flags &= ~_TLF_RESTORE_SIGMASK;
			sigprocmask(SIG_SETMASK, &current->saved_sigmask, NULL);
		}
		return 0;               /* no signals delivered */
	}

        /*
	 * Reenable the DABR before delivering the signal to
	 * user space. The DABR will have been cleared if it
	 * triggered inside the kernel.
	 */
	if (current->thread.dabr) {
		set_dabr(current->thread.dabr);
#if defined(CONFIG_BOOKE)
		mtspr(SPRN_DBCR0, current->thread.dbcr0);
#endif
	}

	if (is32) {
        	if (ka.sa.sa_flags & SA_SIGINFO)
			ret = handle_rt_signal32(signr, &ka, &info, oldset,
					regs);
		else
			ret = handle_signal32(signr, &ka, &info, oldset,
					regs);
	} else {
		ret = handle_rt_signal64(signr, &ka, &info, oldset, regs);
	}

	if (ret) {
		spin_lock_irq(&current->sighand->siglock);
		sigorsets(&current->blocked, &current->blocked,
			  &ka.sa.sa_mask);
		if (!(ka.sa.sa_flags & SA_NODEFER))
			sigaddset(&current->blocked, signr);
		recalc_sigpending();
		spin_unlock_irq(&current->sighand->siglock);

		/*
		 * A signal was successfully delivered; the saved sigmask is in
		 * its frame, and we can clear the TLF_RESTORE_SIGMASK flag.
		 */
		current_thread_info()->local_flags &= ~_TLF_RESTORE_SIGMASK;

		/*
		 * Let tracing know that we've done the handler setup.
		 */
		tracehook_signal_handler(signr, &info, &ka, regs,
					 test_thread_flag(TIF_SINGLESTEP));
	}

	return ret;
}

示例#11

文件： signal.c 项目： kprog/linux

static int do_signal(struct pt_regs *regs)
{
	sigset_t *oldset;
	siginfo_t info;
	int signr;
	struct k_sigaction ka;
	int ret;
	int is32 = is_32bit_task();

	if (current_thread_info()->local_flags & _TLF_RESTORE_SIGMASK)
		oldset = &current->saved_sigmask;
	else
		oldset = &current->blocked;

	signr = get_signal_to_deliver(&info, &ka, regs, NULL);

	/* Is there any syscall restart business here ? */
	check_syscall_restart(regs, &ka, signr > 0);

	if (signr <= 0) {
		struct thread_info *ti = current_thread_info();
		/* No signal to deliver -- put the saved sigmask back */
		if (ti->local_flags & _TLF_RESTORE_SIGMASK) {
			ti->local_flags &= ~_TLF_RESTORE_SIGMASK;
			sigprocmask(SIG_SETMASK, &current->saved_sigmask, NULL);
		}
		regs->trap = 0;
		return 0;               /* no signals delivered */
	}

#ifndef CONFIG_PPC_ADV_DEBUG_REGS
        /*
	 * Reenable the DABR before delivering the signal to
	 * user space. The DABR will have been cleared if it
	 * triggered inside the kernel.
	 */
	if (current->thread.dabr)
		set_dabr(current->thread.dabr);
#endif
	/* Re-enable the breakpoints for the signal stack */
	thread_change_pc(current, regs);

	if (is32) {
        	if (ka.sa.sa_flags & SA_SIGINFO)
			ret = handle_rt_signal32(signr, &ka, &info, oldset,
					regs);
		else
			ret = handle_signal32(signr, &ka, &info, oldset,
					regs);
	} else {
		ret = handle_rt_signal64(signr, &ka, &info, oldset, regs);
	}

	regs->trap = 0;
	if (ret) {
		block_sigmask(&ka, signr);

		/*
		 * A signal was successfully delivered; the saved sigmask is in
		 * its frame, and we can clear the TLF_RESTORE_SIGMASK flag.
		 */
		current_thread_info()->local_flags &= ~_TLF_RESTORE_SIGMASK;

		/*
		 * Let tracing know that we've done the handler setup.
		 */
		tracehook_signal_handler(signr, &info, &ka, regs,
					 test_thread_flag(TIF_SINGLESTEP));
	}

	return ret;
}