freebsd32_misc.c (1ce4b357402c3cd0cba264a15c06b6fd00591088) freebsd32_misc.c (e015b1ab0a428e65297e44471d257d7eb589b383)
1/*-
2 * Copyright (c) 2002 Doug Rabson
3 * All rights reserved.
4 *
5 * Redistribution and use in source and binary forms, with or without
6 * modification, are permitted provided that the following conditions
7 * are met:
8 * 1. Redistributions of source code must retain the above copyright

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2623 error = copyout(&s32, p32, sizeof(s32));
2624 }
2625 return (error);
2626}
2627#endif
2628
2629int
2630syscall32_register(int *offset, struct sysent *new_sysent,
1/*-
2 * Copyright (c) 2002 Doug Rabson
3 * All rights reserved.
4 *
5 * Redistribution and use in source and binary forms, with or without
6 * modification, are permitted provided that the following conditions
7 * are met:
8 * 1. Redistributions of source code must retain the above copyright

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2623 error = copyout(&s32, p32, sizeof(s32));
2624 }
2625 return (error);
2626}
2627#endif
2628
2629int
2630syscall32_register(int *offset, struct sysent *new_sysent,
2631 struct sysent *old_sysent)
2631 struct sysent *old_sysent, int flags)
2632{
2632{
2633
2634 if ((flags & ~SY_THR_STATIC) != 0)
2635 return (EINVAL);
2636
2633 if (*offset == NO_SYSCALL) {
2634 int i;
2635
2636 for (i = 1; i < SYS_MAXSYSCALL; ++i)
2637 if (freebsd32_sysent[i].sy_call ==
2638 (sy_call_t *)lkmnosys)
2639 break;
2640 if (i == SYS_MAXSYSCALL)
2641 return (ENFILE);
2642 *offset = i;
2643 } else if (*offset < 0 || *offset >= SYS_MAXSYSCALL)
2644 return (EINVAL);
2645 else if (freebsd32_sysent[*offset].sy_call != (sy_call_t *)lkmnosys &&
2646 freebsd32_sysent[*offset].sy_call != (sy_call_t *)lkmressys)
2647 return (EEXIST);
2648
2649 *old_sysent = freebsd32_sysent[*offset];
2650 freebsd32_sysent[*offset] = *new_sysent;
2637 if (*offset == NO_SYSCALL) {
2638 int i;
2639
2640 for (i = 1; i < SYS_MAXSYSCALL; ++i)
2641 if (freebsd32_sysent[i].sy_call ==
2642 (sy_call_t *)lkmnosys)
2643 break;
2644 if (i == SYS_MAXSYSCALL)
2645 return (ENFILE);
2646 *offset = i;
2647 } else if (*offset < 0 || *offset >= SYS_MAXSYSCALL)
2648 return (EINVAL);
2649 else if (freebsd32_sysent[*offset].sy_call != (sy_call_t *)lkmnosys &&
2650 freebsd32_sysent[*offset].sy_call != (sy_call_t *)lkmressys)
2651 return (EEXIST);
2652
2653 *old_sysent = freebsd32_sysent[*offset];
2654 freebsd32_sysent[*offset] = *new_sysent;
2651 return 0;
2655 atomic_store_rel_32(&freebsd32_sysent[*offset].sy_thrcnt, flags);
2656 return (0);
2652}
2653
2654int
2655syscall32_deregister(int *offset, struct sysent *old_sysent)
2656{
2657
2657}
2658
2659int
2660syscall32_deregister(int *offset, struct sysent *old_sysent)
2661{
2662
2658 if (*offset)
2659 freebsd32_sysent[*offset] = *old_sysent;
2660 return 0;
2663 if (*offset == 0)
2664 return (0);
2665
2666 freebsd32_sysent[*offset] = *old_sysent;
2667 return (0);
2661}
2662
2663int
2664syscall32_module_handler(struct module *mod, int what, void *arg)
2665{
2666 struct syscall_module_data *data = (struct syscall_module_data*)arg;
2667 modspecific_t ms;
2668 int error;
2669
2670 switch (what) {
2671 case MOD_LOAD:
2672 error = syscall32_register(data->offset, data->new_sysent,
2668}
2669
2670int
2671syscall32_module_handler(struct module *mod, int what, void *arg)
2672{
2673 struct syscall_module_data *data = (struct syscall_module_data*)arg;
2674 modspecific_t ms;
2675 int error;
2676
2677 switch (what) {
2678 case MOD_LOAD:
2679 error = syscall32_register(data->offset, data->new_sysent,
2673 &data->old_sysent);
2680 &data->old_sysent, SY_THR_STATIC_KLD);
2674 if (error) {
2675 /* Leave a mark so we know to safely unload below. */
2676 data->offset = NULL;
2677 return error;
2678 }
2679 ms.intval = *data->offset;
2680 MOD_XLOCK;
2681 module_setspecific(mod, &ms);

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2702 error = EOPNOTSUPP;
2703 if (data->chainevh)
2704 error = data->chainevh(mod, what, data->chainarg);
2705 return (error);
2706 }
2707}
2708
2709int
2681 if (error) {
2682 /* Leave a mark so we know to safely unload below. */
2683 data->offset = NULL;
2684 return error;
2685 }
2686 ms.intval = *data->offset;
2687 MOD_XLOCK;
2688 module_setspecific(mod, &ms);

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2709 error = EOPNOTSUPP;
2710 if (data->chainevh)
2711 error = data->chainevh(mod, what, data->chainarg);
2712 return (error);
2713 }
2714}
2715
2716int
2710syscall32_helper_register(struct syscall_helper_data *sd)
2717syscall32_helper_register(struct syscall_helper_data *sd, int flags)
2711{
2712 struct syscall_helper_data *sd1;
2713 int error;
2714
2715 for (sd1 = sd; sd1->syscall_no != NO_SYSCALL; sd1++) {
2716 error = syscall32_register(&sd1->syscall_no, &sd1->new_sysent,
2718{
2719 struct syscall_helper_data *sd1;
2720 int error;
2721
2722 for (sd1 = sd; sd1->syscall_no != NO_SYSCALL; sd1++) {
2723 error = syscall32_register(&sd1->syscall_no, &sd1->new_sysent,
2717 &sd1->old_sysent);
2724 &sd1->old_sysent, flags);
2718 if (error != 0) {
2719 syscall32_helper_unregister(sd);
2720 return (error);
2721 }
2722 sd1->registered = 1;
2723 }
2724 return (0);
2725}

--- 282 unchanged lines hidden --- 		2725 if (error != 0) {
2726 syscall32_helper_unregister(sd);
2727 return (error);
2728 }
2729 sd1->registered = 1;
2730 }
2731 return (0);
2732}

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