mkimage: Automatically make space in FDT when full

[karo-tx-uboot.git] / tools / fit_common.c

diff --git a/tools/fit_common.c b/tools/fit_common.c
index 286f357ab1769af8c507e6c94719558800ce7a92..81ba698abd2594727522559c0ca8560268bdae20 100644 (file)
--- a/tools/fit_common.c
+++ b/tools/fit_common.c
@@ -38,8 +38,8 @@ int fit_check_image_types(uint8_t type)
                return EXIT_FAILURE;
 }
 
-int mmap_fdt(const char *cmdname, const char *fname, void **blobp,
-            struct stat *sbuf, bool delete_on_error)
+int mmap_fdt(const char *cmdname, const char *fname, size_t size_inc,
+            void **blobp, struct stat *sbuf, bool delete_on_error)
 {
        void *ptr;
        int fd;
@@ -59,6 +59,15 @@ int mmap_fdt(const char *cmdname, const char *fname, void **blobp,
                goto err;
        }
 
+       if (size_inc) {
+               sbuf->st_size += size_inc;
+               if (ftruncate(fd, sbuf->st_size)) {
+                       fprintf(stderr, "%s: Can't expand %s: %s\n",
+                               cmdname, fname, strerror(errno));
+               goto err;
+               }
+       }
+
        errno = 0;
        ptr = mmap(0, sbuf->st_size, PROT_READ|PROT_WRITE, MAP_SHARED, fd, 0);
        if ((ptr == MAP_FAILED) || (errno != 0)) {
@@ -73,6 +82,18 @@ int mmap_fdt(const char *cmdname, const char *fname, void **blobp,
                goto err;
        }
 
+       /* expand if needed */
+       if (size_inc) {
+               int ret;
+
+               ret = fdt_open_into(ptr, ptr, sbuf->st_size);
+               if (ret) {
+                       fprintf(stderr, "%s: Cannot expand FDT: %s\n",
+                               cmdname, fdt_strerror(ret));
+                       goto err;
+               }
+       }
+
        *blobp = ptr;
        return fd;