X-Git-Url: https://scm.lunaixsky.com/lunaix-os.git/blobdiff_plain/f8bd95b7a13dfe54d800e2d7ecdb0329f0798289..986ce23ace2f7875a1a561bd947f435a7594146c:/lunaix-os/kernel/mm/dmm.c

diff --git a/lunaix-os/kernel/mm/dmm.c b/lunaix-os/kernel/mm/dmm.c
index cc75bd9..3da8501 100644
--- a/lunaix-os/kernel/mm/dmm.c
+++ b/lunaix-os/kernel/mm/dmm.c
@@ -1,4 +1,5 @@
 #include <lunaix/mm/mmap.h>
+#include <lunaix/mm/vmm.h>
 #include <lunaix/process.h>
 #include <lunaix/status.h>
 
@@ -6,6 +7,31 @@
 #include <lunaix/syscall.h>
 #include <lunaix/syscall_utils.h>
 
+void
+__heap_copied(struct mm_region* region)
+{
+    mm_index((void**)&region->proc_vms->heap, region);
+}
+
+int
+create_heap(struct proc_mm* pvms, ptr_t addr)
+{
+    struct mmap_param map_param = { .pvms = pvms,
+                                    .vms_mnt = VMS_SELF,
+                                    .flags = MAP_ANON | MAP_PRIVATE,
+                                    .type = REGION_TYPE_HEAP,
+                                    .proct = PROT_READ | PROT_WRITE,
+                                    .mlen = PG_SIZE };
+    int status = 0;
+    struct mm_region* heap;
+    if ((status = mem_map(NULL, &heap, addr, NULL, &map_param))) {
+        return status;
+    }
+
+    heap->region_copied = __heap_copied;
+    mm_index((void**)&pvms->heap, heap);
+}
+
 __DEFINE_LXSYSCALL1(void*, sbrk, ssize_t, incr)
 {
     struct proc_mm* pvms = &__current->mm;
@@ -24,6 +50,10 @@ __DEFINE_LXSYSCALL1(int, brk, void*, addr)
     struct proc_mm* pvms = &__current->mm;
     struct mm_region* heap = pvms->heap;
 
+    if (!heap) {
+        return DO_STATUS(create_heap(pvms, addr));
+    }
+
     assert(heap);
     int err = mem_adjust_inplace(&pvms->regions, heap, (ptr_t)addr);
     return DO_STATUS(err);