X-Git-Url: https://git.sur5r.net/?a=blobdiff_plain;f=tools%2Fenvcrc.c;h=c8c50d71962456e21724f68c733e2e863ff41fb9;hb=3df61957938586c512c17e72d83551d190400981;hp=d02a7dbcdccac059c7f64b8cbbbb79658147f2c5;hpb=6dab6add2d8ee80905234b326abc3de11be1d178;p=u-boot

diff --git a/tools/envcrc.c b/tools/envcrc.c
index d02a7dbcdc..c8c50d7196 100644
--- a/tools/envcrc.c
+++ b/tools/envcrc.c
@@ -21,6 +21,7 @@
  * MA 02111-1307 USA
  */
 
+#include <errno.h>
 #include <stdio.h>
 #include <stdint.h>
 #include <stdlib.h>
@@ -50,6 +51,10 @@
 # if defined(CONFIG_ENV_ADDR_REDUND) && !defined(CONFIG_ENV_SIZE_REDUND)
 #  define CONFIG_ENV_SIZE_REDUND	CONFIG_ENV_SIZE
 # endif
+# if (CONFIG_ENV_ADDR >= CONFIG_SYS_MONITOR_BASE) && \
+     ((CONFIG_ENV_ADDR + CONFIG_ENV_SIZE) <= (CONFIG_SYS_MONITOR_BASE + CONFIG_SYS_MONITOR_LEN))
+#  define ENV_IS_EMBEDDED	1
+# endif
 # if defined(CONFIG_ENV_ADDR_REDUND) || defined(CONFIG_ENV_OFFSET_REDUND)
 #  define CONFIG_SYS_REDUNDAND_ENVIRONMENT	1
 # endif
@@ -66,11 +71,14 @@
 
 extern uint32_t crc32 (uint32_t, const unsigned char *, unsigned int);
 
+#ifdef	ENV_IS_EMBEDDED
 extern unsigned int env_size;
 extern unsigned char environment;
+#endif	/* ENV_IS_EMBEDDED */
 
 int main (int argc, char **argv)
 {
+#ifdef	ENV_IS_EMBEDDED
 	unsigned char pad = 0x00;
 	uint32_t crc;
 	unsigned char *envptr = &environment,
@@ -114,7 +122,8 @@ int main (int argc, char **argv)
 			}
 			for (i = start; i != end; i += step)
 				printf("%c", (crc & (0xFF << (i * 8))) >> (i * 8));
-			fwrite(dataptr, 1, datasize, stdout);
+			if (fwrite(dataptr, 1, datasize, stdout) != datasize)
+				fprintf(stderr, "fwrite() failed: %s\n", strerror(errno));
 		} else {
 			printf("CRC32 from offset %08X to %08X of environment = %08X\n",
 				(unsigned int) (dataptr - envptr),
@@ -124,6 +133,8 @@ int main (int argc, char **argv)
 	} else {
 		printf ("0x%08X\n", crc);
 	}
-
+#else
+	printf ("0\n");
+#endif
 	return EXIT_SUCCESS;
 }