1 files changed, 93 insertions, 0 deletions
diff --git a/util/buildrom/buildrom.c b/util/buildrom/buildrom.c
new file mode 100644
index 0000000000..44f0c44186
--- /dev/null
+++ b/util/buildrom/buildrom.c
@@ -0,0 +1,93 @@
+#include <stdio.h>
+#include <stdlib.h>
+#include <sys/types.h>
+#include <sys/stat.h>
+#include <fcntl.h>
+#include <unistd.h>
+
+
+/* this is the beginning of a tool which will eventually 
+ * be able to build rom images with both fallback and 
+ * normal. For now it just builds a single image
+ * into a rom iamge
+ */
+/* one switch we already need: -zero allowing you to tell what 
+ * to do with numbers that are "zero": make them 0xff or whatever
+ * for flash
+ * For now we assume "zero" is 0xff
+ */
+
+void
+usage(){
+	fprintf(stderr, "Usage: buildrom <input> <output> <payload> ");
+	fprintf(stderr, " <linuxbios-size> <total-size\n");
+	exit(1);
+}
+
+void
+fatal(char *s){
+	perror(s);
+	exit(2);
+}
+int
+main(int argc, char *argv[]) {
+	int infd, payloadfd, outfd, size, insize, readlen, writelen, i;
+	int romsize;
+	unsigned char *cp;
+	struct stat inbuf, payloadbuf;
+	char zero = 0xff;
+
+	if (argc != 6)
+		usage();
+
+
+	infd = open(argv[1], O_RDONLY);
+	if (infd < 0)
+		fatal(argv[1]);
+	outfd = open(argv[2], O_RDWR|O_CREAT, 0666);
+	if (outfd < 0)
+		fatal(argv[2]);
+	payloadfd = open(argv[3], O_RDONLY);
+	if (payloadfd < 0)
+		fatal(argv[3]);
+	size = strtol(argv[4], 0, 0);
+	romsize = strtol(argv[5], 0, 0);
+
+	if (fstat(infd, &inbuf) < 0)
+		fatal("stat of infile");
+	if (inbuf.st_size > size) 
+		fatal("input file larger than allowed size!\n");
+
+	if (fstat(payloadfd, &payloadbuf) < 0)
+		fatal("stat of infile");
+	if (payloadbuf.st_size > (romsize - size))
+		fatal("payload + linuxbios size larger than ROM size!\n");
+
+	cp = malloc(romsize);
+	if (! cp) 
+		fatal("malloc buffer");
+
+	for(i = 0; i < romsize; i++)
+		cp[i] = zero;
+	/* read the input file in at the END of the array */
+	readlen = read(infd, &cp[romsize - inbuf.st_size], inbuf.st_size);
+	if (readlen < inbuf.st_size) {
+		fprintf(stderr, "Wanted %d, got %d\n", inbuf.st_size, readlen);
+		fatal("Read input file");
+	}
+
+	/* read the payload file in at the START of the array */
+	readlen = read(payloadfd, cp, payloadbuf.st_size);
+	if (readlen < payloadbuf.st_size) {
+		fprintf(stderr, "Wanted %d, got %d\n", 
+					payloadbuf.st_size, readlen);
+		fatal("Read payload file");
+	}
+	writelen = write(outfd, cp, romsize);
+	if (writelen < size) {
+		fprintf(stderr, "Wanted %d, got %d\n", size, writelen);
+		fatal("Write output file");
+	}
+
+	return 0;
+}