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| Rev 2133 | Rev 2141 | ||
|---|---|---|---|
| Line 611... | Line 611... | ||
| 611 | * |
611 | * |
| 612 | * @return Zero on success or ENOENT if there is no such task or if there is no |
612 | * @return Zero on success or ENOENT if there is no such task or if there is no |
| 613 | * such address space area, EPERM if there was a problem in accepting the area |
613 | * such address space area, EPERM if there was a problem in accepting the area |
| 614 | * or ENOMEM if there was a problem in allocating destination address space |
614 | * or ENOMEM if there was a problem in allocating destination address space |
| 615 | * area. ENOTSUP is returned if the address space area backend does not support |
615 | * area. ENOTSUP is returned if the address space area backend does not support |
| 616 | * sharing or if the kernel detects an attempt to create an illegal address |
- | |
| 617 | * alias. |
616 | * sharing. |
| 618 | */ |
617 | */ |
| 619 | int as_area_share(as_t *src_as, uintptr_t src_base, size_t acc_size, |
618 | int as_area_share(as_t *src_as, uintptr_t src_base, size_t acc_size, |
| 620 | as_t *dst_as, uintptr_t dst_base, int dst_flags_mask) |
619 | as_t *dst_as, uintptr_t dst_base, int dst_flags_mask) |
| 621 | { |
620 | { |
| 622 | ipl_t ipl; |
621 | ipl_t ipl; |
| Line 665... | Line 664... | ||
| 665 | mutex_unlock(&src_as->lock); |
664 | mutex_unlock(&src_as->lock); |
| 666 | interrupts_restore(ipl); |
665 | interrupts_restore(ipl); |
| 667 | return EPERM; |
666 | return EPERM; |
| 668 | } |
667 | } |
| 669 | 668 | ||
| 670 | #ifdef CONFIG_VIRT_IDX_DCACHE |
- | |
| 671 | if (!(dst_flags_mask & AS_AREA_EXEC)) { |
- | |
| 672 | if (PAGE_COLOR(src_area->base) != PAGE_COLOR(dst_base)) { |
- | |
| 673 | /* |
- | |
| 674 | * Refuse to create an illegal address alias. |
- | |
| 675 | */ |
- | |
| 676 | mutex_unlock(&src_area->lock); |
- | |
| 677 | mutex_unlock(&src_as->lock); |
- | |
| 678 | interrupts_restore(ipl); |
- | |
| 679 | return ENOTSUP; |
- | |
| 680 | } |
- | |
| 681 | } |
- | |
| 682 | #endif /* CONFIG_VIRT_IDX_DCACHE */ |
- | |
| 683 | - | ||
| 684 | /* |
669 | /* |
| 685 | * Now we are committed to sharing the area. |
670 | * Now we are committed to sharing the area. |
| 686 | * First, prepare the area for sharing. |
671 | * First, prepare the area for sharing. |
| 687 | * Then it will be safe to unlock it. |
672 | * Then it will be safe to unlock it. |
| 688 | */ |
673 | */ |
| Line 899... | Line 884... | ||
| 899 | * The old address space is no longer active on |
884 | * The old address space is no longer active on |
| 900 | * any processor. It can be appended to the |
885 | * any processor. It can be appended to the |
| 901 | * list of inactive address spaces with assigned |
886 | * list of inactive address spaces with assigned |
| 902 | * ASID. |
887 | * ASID. |
| 903 | */ |
888 | */ |
| 904 | ASSERT(old_as->asid != ASID_INVALID); |
889 | ASSERT(old_as->asid != ASID_INVALID); |
| 905 | list_append(&old_as->inactive_as_with_asid_link, |
890 | list_append(&old_as->inactive_as_with_asid_link, |
| 906 | &inactive_as_with_asid_head); |
891 | &inactive_as_with_asid_head); |
| 907 | } |
892 | } |
| 908 | mutex_unlock(&old_as->lock); |
893 | mutex_unlock(&old_as->lock); |
| 909 | 894 | ||
| 910 | /* |
895 | /* |
| 911 | * Perform architecture-specific tasks when the address space |
896 | * Perform architecture-specific tasks when the address space |