diff options
Diffstat (limited to 'kernel/memory/memory.c')
| -rw-r--r-- | kernel/memory/memory.c | 26 |
1 files changed, 20 insertions, 6 deletions
diff --git a/kernel/memory/memory.c b/kernel/memory/memory.c index 7ceb491..295823e 100644 --- a/kernel/memory/memory.c +++ b/kernel/memory/memory.c @@ -52,7 +52,7 @@ mem_ctx_t mem_ctx_alloc(void) if (ctx == NULL) return NULL; - if ((ctx->pml4 = paging_alloc()) == NULL) + if ((ctx->pml4 = pgdir_alloc()) == NULL) return NULL; virtaddr_init(&ctx->virtctx); @@ -64,17 +64,31 @@ mem_ctx_t mem_ctx_alloc(void) return ctx; } -mem_ctx_t mem_ctx_clone(mem_ctx_t ctx, bool cow) +mem_ctx_t mem_ctx_clone(const mem_ctx_t old, bool cow) { - (void)ctx; - (void)cow; + mem_ctx_t new = user_mem_ctx_next; + if (new == NULL) + return NULL; + + if ((new->pml4 = pgdir_clone(old->pml4, cow)) == NULL) + return NULL; + + if (virtaddr_clone(&old->virtctx, &new->virtctx)) { + pgdir_free(new->pml4); + return NULL; + } + + user_mem_ctx_next = new->prev; + if (new->prev) + new->prev->next = NULL; + new->prev = NULL; - panic("not yet implemented"); + return new; } void mem_ctx_free(mem_ctx_t ctx) { - paging_free(ctx->pml4); + pgdir_free(ctx->pml4); virtaddr_cleanup(&ctx->virtctx); if (user_mem_ctx_next == NULL) { |