This is the new unified bootstrap, sometimes known previously as the

'three-stage' bootstrap.
There are a number of caveats with the code in its current state:
 - The i386 bootstrap only supports booting from a floppy.
 - The kernel and kld do not yet know how to deal with the extended
   information and module summary passed in.
 - PnP-based autodetection and demand loading of modules is not implemented.
 - i386 ELF kernel loading is not ready yet.
 - The i386 bootstrap is loaded via an ugly blockmap.

On the alpha, both net- and disk-booting (SRM console machines only) is
supported.  No blockmaps are used by this code.

Obtained from:	Parts from the NetBSD/i386 standalone bootstrap.

1 files changed, 129 insertions, 0 deletions

diff --git a/sys/boot/common/module.c b/sys/boot/common/module.c
new file mode 100644
index 0000000..7f56e71
--- /dev/null
+++ b/sys/boot/common/module.c
@@ -0,0 +1,129 @@
+/*-
+ * Copyright (c) 1998 Michael Smith <msmith@freebsd.org>
+ * All rights reserved.
+ *
+ * Redistribution and use in source and binary forms, with or without
+ * modification, are permitted provided that the following conditions
+ * are met:
+ * 1. Redistributions of source code must retain the above copyright
+ *    notice, this list of conditions and the following disclaimer.
+ * 2. Redistributions in binary form must reproduce the above copyright
+ *    notice, this list of conditions and the following disclaimer in the
+ *    documentation and/or other materials provided with the distribution.
+ *
+ * THIS SOFTWARE IS PROVIDED BY THE AUTHOR AND CONTRIBUTORS ``AS IS'' AND
+ * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
+ * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
+ * ARE DISCLAIMED.  IN NO EVENT SHALL THE AUTHOR OR CONTRIBUTORS BE LIABLE
+ * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
+ * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS
+ * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
+ * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
+ * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY
+ * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
+ * SUCH DAMAGE.
+ *
+ *	$Id$
+ */
+
+/*
+ * module function dispatcher, support, etc.
+ *
+ * XXX need a 'searchmodule' function that takes a name and
+ *     traverses a search path.
+ */
+
+#include <stand.h>
+#include <string.h>
+
+#include "bootstrap.h"
+
+/* Initially determined from kernel load address */
+static vm_offset_t	loadaddr = 0;
+
+struct loaded_module *loaded_modules = NULL;
+
+COMMAND_SET(load, "load", "load a kernel or module", command_load);
+
+static int
+command_load(int argc, char *argv[])
+{
+    return(mod_load(argv[1], argc - 2, argv + 2));
+}
+
+COMMAND_SET(lsmod, "lsmod", "list loaded modules", command_lsmod);
+
+static int
+command_lsmod(int argc, char *argv[])
+{
+    struct loaded_module	*am;
+    char			lbuf[80];
+    
+    pager_open();
+    for (am = loaded_modules; (am != NULL); am = am->m_next) {
+	sprintf(lbuf, " %p: %s (%s, 0x%x)\n", 
+		am->m_addr, am->m_name, am->m_type, am->m_size);
+	pager_output(lbuf);
+	if (am->m_args != NULL) {
+	    pager_output("    args: ");
+	    pager_output(am->m_args);
+	    pager_output("\n");
+	}
+    }
+    pager_close();
+    return(CMD_OK);
+}
+
+int
+mod_load(char *name, int argc, char *argv[])
+{
+    struct loaded_module	*am, *cm;
+    int				i, err;
+    
+    for (i = 0, am = NULL; (module_formats[i] != NULL) && (am == NULL); i++) {
+	/* XXX call searchmodule() to search for module (name) */
+	if ((err = (module_formats[i]->l_load)(name, loadaddr, &am)) != 0) {
+
+	    /* Unknown to this handler? */
+	    if (err == EFTYPE)
+		continue;
+		
+	    /* Fatal error */
+	    sprintf(command_errbuf, "can't load module '%s': %s", name, strerror(err));
+	    return(CMD_ERROR);
+	}
+    }
+    if (am == NULL) {
+	sprintf(command_errbuf, "can't work out what to do with '%s'", name);
+	return(CMD_ERROR);
+    }
+    /* where can we put the next one? */
+    loadaddr = am->m_addr + am->m_size;
+	
+    /* Load was OK, set args */
+    am->m_args = unargv(argc, argv);
+
+    /* Append to list of loaded modules */
+    am->m_next = NULL;
+    if (loaded_modules == NULL) {
+	loaded_modules = am;
+    } else {
+	for (cm = loaded_modules; cm->m_next != NULL; cm = cm->m_next)
+	    ;
+	cm->m_next = am;
+    }
+    return(CMD_OK);
+}
+
+struct loaded_module *
+mod_findmodule(char *name, char *type)
+{
+    struct loaded_module	*mp;
+    
+    for (mp = loaded_modules; mp != NULL; mp = mp->m_next) {
+	if (((name == NULL) || !strcmp(name, mp->m_name)) &&
+	    ((type == NULL) || !strcmp(type, mp->m_type)))
+	    break;
+    }
+    return(mp);
+}