feat: brk and sbrk (mmap based)

[lunaix-os.git] / lunaix-os / kernel / mm / dmm.c

diff --git a/lunaix-os/kernel/mm/dmm.c b/lunaix-os/kernel/mm/dmm.c
index 188bb0635eebf9a5771d979c55d3e04f642a74e0..cc75bd9be9b4d5f32b782b28733fbf7be54fbd31 100644 (file)
--- a/lunaix-os/kernel/mm/dmm.c
+++ b/lunaix-os/kernel/mm/dmm.c
@@ -1,18 +1,30 @@
-#include <lunaix/mm/page.h>
-#include <lunaix/mm/vmm.h>
+#include <lunaix/mm/mmap.h>
+#include <lunaix/process.h>
 #include <lunaix/status.h>
 
 #include <lunaix/spike.h>
 #include <lunaix/syscall.h>
+#include <lunaix/syscall_utils.h>
 
-__DEFINE_LXSYSCALL1(int, sbrk, size_t, size)
+__DEFINE_LXSYSCALL1(void*, sbrk, ssize_t, incr)
 {
-    // TODO mem_remap to expand heap region
-    return 0;
+    struct proc_mm* pvms = &__current->mm;
+    struct mm_region* heap = pvms->heap;
+
+    assert(heap);
+    int err = mem_adjust_inplace(&pvms->regions, heap, heap->end + incr);
+    if (err) {
+        return (void*)DO_STATUS(err);
+    }
+    return (void*)heap->end;
 }
 
-__DEFINE_LXSYSCALL1(void*, brk, void*, addr)
+__DEFINE_LXSYSCALL1(int, brk, void*, addr)
 {
-    // TODO mem_remap to expand heap region
-    return 0;
+    struct proc_mm* pvms = &__current->mm;
+    struct mm_region* heap = pvms->heap;
+
+    assert(heap);
+    int err = mem_adjust_inplace(&pvms->regions, heap, (ptr_t)addr);
+    return DO_STATUS(err);
 }
\ No newline at end of file