fel: Correct fel write operation on files > 8K

fel-copy.c

+/*
+ * (C) Copyright 2011 Henrik Nordstrom <henrik@henriknordstrom.net>
+ *
+ * This program is free software; you can redistribute it and/or
+ * modify it under the terms of the GNU General Public License as
+ * published by the Free Software Foundation; either version 2 of
+ * the License, or (at your option) any later version.
+ *
+ * This program is distributed in the hope that it will be useful,
+ * but WITHOUT ANY WARRANTY; without even the implied warranty of
+ * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
+ * GNU General Public License for more details.
+ *
+ * You should have received a copy of the GNU General Public License
+ * along with this program; if not, write to the Free Software
+ * Foundation, Inc., 59 Temple Place, Suite 330, Boston,
+ * MA 02111-1307 USA
+ */
+
+/*
+
+Build instructions:
+
+arm-none-linux-gnueabi-gcc  -g  -Os   -fno-common -ffixed-r8 -msoft-float -fno-builtin -ffreestanding -nostdinc -mno-thumb-interwork -Wall -Wstrict-prototypes -fno-stack-protector -Wno-format-nonliteral -Wno-format-security -fno-toplevel-reorder  fel-copy.c -c
+
+arm-none-linux-gnueabi-objcopy -O binary fel-copy.o fel-copy.bin
+
+Parameters:
+	0x2100	Destination address
+	0x2104	Source address
+	0x2108	Length
+
+Source address is updated, allowing repeated copy to same destination
+*/
+
+#define CONFIG_BASE 0x2100
+
+void copy(void)
+{
+	unsigned long *b = (void *)CONFIG_BASE;
+	unsigned long **ptr = (void *)b++;
+	unsigned long *a = *ptr;
+	unsigned long i = *b++;
+	while (i--) {
+		*b++ = *a++;
+	}
+	*ptr = a;
+}
+

fel.c

@@ -225,12 +225,11 @@ void *load_file(const char *name, size_t *size)
 	assert(in);
 	
 	while(1) {
-		ssize_t n = fread(buf+offset, 1, bufsize - offset, in);
-		assert(n>=0);
+		ssize_t len = bufsize - offset;
+		ssize_t n = fread(buf+offset, 1, len, in);
 		offset += n;
-		if (bufsize >= offset) {
+		if (n < len)
 			break;
-		}
 		bufsize <<= 1;
 		buf = realloc(buf, bufsize);
 	}