- lptr = (ulong*)memsize;
- *(--lptr) = CFG_ENV_SIZE;
- *(--lptr) = memsize - env_base;
- *(--lptr) = crc32(0, (void*)(memsize - 0x08), 0x08);
- *(--lptr) = 0;
+ /* reserve 4k for pointer field */
+ nextbase = base - 4096;
+ lptr = (ulong*)(base);
+
+ /*
+ * *(--lptr) = item_size;
+ * *(--lptr) = base - item_base = distance from field top;
+ */
+
+ /* env is first (4k aligned) */
+ nextbase -= ((CONFIG_ENV_SIZE + 4096 - 1) & ~(4096 - 1));
+ envp = (env_t *)nextbase;
+ res = (char *)envp->data;
+ len = hexport_r(&env_htab, '\0', 0, &res, ENV_SIZE, 0, NULL);
+ if (len < 0) {
+ error("Cannot export environment: errno = %d\n", errno);
+ return 1;
+ }
+ envp->crc = crc32(0, envp->data, ENV_SIZE);
+
+ *(--lptr) = CONFIG_ENV_SIZE; /* size */
+ *(--lptr) = base - nextbase; /* offset | type=0 */