550,12 → 550,13 |
* @param dst_base Target base address. |
* @param dst_flags_mask Destination address space area flags mask. |
* |
* @return Zero on success or ENOENT if there is no such task or |
* if there is no such address space area, |
* EPERM if there was a problem in accepting the area or |
* ENOMEM if there was a problem in allocating destination |
* address space area. ENOTSUP is returned if an attempt |
* to share non-anonymous address space area is detected. |
* @return Zero on success or ENOENT if there is no such task or if there is no |
* such address space area, EPERM if there was a problem in accepting the area |
* or ENOMEM if there was a problem in allocating destination address space |
* area. ENOTSUP is returned if the address space area backend does not support |
* sharing. It can be also returned if the architecture uses virtually indexed |
* caches and the source and destination areas start at pages with different |
* page colors. |
*/ |
int as_area_share(as_t *src_as, uintptr_t src_base, size_t acc_size, |
as_t *dst_as, uintptr_t dst_base, int dst_flags_mask) |
580,6 → 581,20 |
return ENOENT; |
} |
|
#if 0 /* disable the check for now */ |
#ifdef CONFIG_VIRT_IDX_CACHE |
if (PAGE_COLOR(src_area->base) != PAGE_COLOR(dst_base)) { |
/* |
* Refuse to create illegal address alias. |
*/ |
mutex_unlock(&src_area->lock); |
mutex_unlock(&src_as->lock); |
interrupts_restore(ipl); |
return ENOTSUP; |
} |
#endif /* CONFIG_VIRT_IDX_CACHE */ |
#endif |
|
if (!src_area->backend || !src_area->backend->share) { |
/* |
* There is no backend or the backend does not |