Consolidate arch-specific sbrk() implementations

[platform/kernel/u-boot.git] / common / dlmalloc.c

diff --git a/common/dlmalloc.c b/common/dlmalloc.c
index 4a18562..f3bced4 100644 (file)
--- a/common/dlmalloc.c
+++ b/common/dlmalloc.c
@@ -1502,7 +1502,23 @@ void malloc_bin_reloc (void)
                *p++ += gd->reloc_off;
        }
 }
-\f
+
+ulong mem_malloc_start = 0;
+ulong mem_malloc_end = 0;
+ulong mem_malloc_brk = 0;
+
+void *sbrk(ptrdiff_t increment)
+{
+       ulong old = mem_malloc_brk;
+       ulong new = old + increment;
+
+       if ((new < mem_malloc_start) || (new > mem_malloc_end))
+               return NULL;
+
+       mem_malloc_brk = new;
+
+       return (void *)old;
+}
 
 /* field-extraction macros */