Initial root filesystem is now on a ramdisk that is part of the image.

drivers/memory/ramdisk/bintoc.c

@@ -0,0 +1,129 @@
+/*
+bintoc.c
+
+Convert a (binary) file to a series of comma separated hex values suitable
+for initializing a character array in C.
+*/
+
+#define _POSIX_C_SOURCE 2
+
+#include <errno.h>
+#include <stdarg.h>
+#include <stdio.h>
+#include <stdlib.h>
+#include <string.h>
+#include <unistd.h>
+
+char *progname;
+unsigned char buf[1024];
+
+static void fatal(char *fmt, ...);
+static void usage(void);
+
+int main(int argc, char *argv[])
+{
+	int c, i, r, first;
+	FILE *file_in, *file_out;
+	char *in_name;
+	char *o_arg;
+
+	(progname=strrchr(argv[0],'/')) ? progname++ : (progname=argv[0]);
+
+	o_arg= NULL;
+	while (c= getopt(argc, argv, "?o:"), c != -1)
+	{
+		switch(c)
+		{
+		case '?': usage();
+		case 'o': o_arg= optarg; break;
+		default:  fatal("getopt failed: '%c'\n", c);
+		}
+	}
+
+	if (o_arg)
+	{
+		file_out= fopen(o_arg, "w");
+		if (file_out == NULL)
+		{
+			fatal("unable to create '%s': %s\n",
+				o_arg, strerror(errno));
+			exit(1);
+		}
+	}
+	else
+		file_out= stdout;
+
+	if (optind < argc)
+	{
+		in_name= argv[optind];
+		optind++;
+		file_in= fopen(in_name, "r");
+		if (file_in == NULL)
+		{
+			fatal("unable to open '%s': %s",
+				in_name, strerror(errno));
+		}
+	}
+	else
+	{
+		in_name= "(stdin)";
+		file_in= stdin;
+	}
+
+	if (optind != argc)
+		usage();
+
+	first= 1;
+	for (;;)
+	{
+		r= fread(buf, 1, sizeof(buf), file_in);
+		if (r == 0)
+			break;
+		for (i= 0; i<r; i++)
+		{
+			if ((i % 8) == 0)
+			{
+				if (first)
+				{
+					fprintf(file_out, "\t");
+					first= 0;
+				}
+				else
+					fprintf(file_out, ",\n\t");
+			}
+			else
+				fprintf(file_out, ", ");
+			fprintf(file_out, "0x%02x", buf[i]);
+		}
+	}
+
+	if (ferror(file_in))
+	{
+		fatal("read error on %s: %s\n",
+			in_name, strerror(errno));
+	}
+	fprintf(file_out, "\n");
+
+	exit(0);
+}
+
+static void fatal(char *fmt, ...)
+{
+	va_list ap;
+
+	fprintf(stderr, "%s: ", progname);
+
+	va_start(ap, fmt);
+	vfprintf(stderr, fmt, ap);
+	va_end(ap);
+
+	fprintf(stderr, "\n");
+
+	exit(1);
+}
+
+static void usage(void)
+{
+	fprintf(stderr, "Usage: bintoc [-o <out-file>] [<in-file>]\n");
+	exit(1);
+}