first and last commit

lib/ramdisk/library.mk

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+# Copyright (C) 2014 Apple Inc. All rights reserved.
+#
+# This document is the property of Apple Inc.
+# It is considered confidential and proprietary.
+#
+# This document may not be reproduced or transmitted in any form,
+# in whole or in part, without the express written permission of
+# Apple Inc.
+#
+
+LIBRAMDISK_DIR		:=	$(GET_LOCAL_DIR)
+LIBRAMDISK_BUILD	:=	$(call TOLIBDIR,$(LIBRAMDISK_DIR)/LIBRAMDISK.a)
+COMMONLIBS		+=	LIBRAMDISK
+
+# Only process the remainder of the makefile if we are building libraries
+#
+ifeq ($(MAKEPHASE),libraries)
+
+LIBRAMDISK_OBJS		:=	$(LIBRAMDISK_DIR)/ramdisk.o
+
+LIBRAMDISK_OBJS		:=	$(call TOLIBOBJDIR,$(LIBRAMDISK_OBJS))
+
+ALL_DEPS		+=	$(LIBRAMDISK_OBJS:%o=%d)
+
+$(LIBRAMDISK_BUILD):	$(LIBRAMDISK_OBJS)
+
+endif

lib/ramdisk/ramdisk.c

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+/*
+ * Copyright (C) 2007-2014 Apple Inc. All rights reserved.
+ * Copyright (C) 2006 Apple Computer, Inc. All rights reserved.
+ *
+ * This document is the property of Apple Inc.
+ * It is considered confidential and proprietary.
+ *
+ * This document may not be reproduced or transmitted in any form,
+ * in whole or in part, without the express written permission of
+ * Apple Inc.
+ */
+#include <debug.h>
+#include <lib/env.h>
+#include <lib/image.h>
+#include <lib/mib.h>
+#include <sys/menu.h>
+
+addr_t gRAMDiskAddr = 0;
+size_t gRAMDiskSize = 0;
+
+int ramdisk_init(void)
+{
+	gRAMDiskAddr = 0;
+	gRAMDiskSize = 0;
+  
+	return 0;
+}
+
+int do_ramdisk(int argc, struct cmd_arg *argv)
+{
+	addr_t addr = mib_get_addr(kMIBTargetDefaultLoadAddress);
+	uint32_t len, type;
+
+	len = env_get_uint("filesize", 0);
+
+#if !RELEASE_BUILD
+	if ((argc > 3) || ((argc > 1) && !strcmp("help", argv[1].str))) {
+		printf("usage:\n\t%s [<len>] [<address>]\n", argv[0].str);
+		return -1;
+	}
+        
+	addr = env_get_uint("loadaddr", addr);
+
+	if (argc > 1)
+		len = argv[1].u;
+	if (argc > 2)
+		addr = argv[2].u;
+#endif
+	if (len == 0) {
+		printf("filesize variable invalid or not set, aborting\n");
+		return -1;
+	}
+
+	if (!security_allow_memory((void *)addr, len)) {
+		printf("Permission Denied\n");
+		return -1;
+	}
+
+	gRAMDiskAddr = mib_get_addr(kMIBTargetDefaultRamdiskAddress);
+	gRAMDiskSize = len;
+	type = IMAGE_TYPE_RAMDISK;
+	if (image_load_memory(addr, len, &gRAMDiskAddr, &gRAMDiskSize, &type, 1, NULL, 0)) {
+		printf("Ramdisk image not valid\n");
+		gRAMDiskAddr = 0;
+		gRAMDiskSize = 0;
+		return -1;
+	}
+
+	/* consolidate environment */
+	security_consolidate_environment();
+
+	dprintf(DEBUG_INFO, "loaded ramdisk at %p of size %#zx, from image at %p\n", (void *)gRAMDiskAddr, gRAMDiskSize, (void *)addr);
+
+	return 0;
+}
+
+int
+load_ramdisk_file(const char *path)
+{
+	u_int32_t type;
+
+	if (!mib_get_bool(kMIBTargetWithFileSystem)) {
+		return -1;
+	}
+
+	/* load to default addresses */
+	gRAMDiskAddr = mib_get_addr(kMIBTargetDefaultRamdiskAddress);
+	gRAMDiskSize = mib_get_size(kMIBTargetDefaultRamdiskSize);
+
+	type = IMAGE_TYPE_RAMDISK;
+	if (image_load_file(path, &gRAMDiskAddr, &gRAMDiskSize, &type, 1, NULL, 0)) {
+		dprintf(DEBUG_INFO, "failed to load ramdisk from %s\n", path);
+		gRAMDiskAddr = 0;
+		gRAMDiskSize = 0;
+		return -1;
+	}
+
+	/* consolidate environment */
+	security_consolidate_environment();
+
+	return 0;
+}
+
+int load_ramdisk(addr_t *ramdisk_addr, size_t *ramdisk_size)
+{
+	if ((gRAMDiskAddr == 0) || (gRAMDiskSize == 0)) {
+		gRAMDiskAddr = mib_get_addr(kMIBTargetDefaultRamdiskAddress);
+		gRAMDiskSize = mib_get_size(kMIBTargetDefaultRamdiskSize);
+
+		if (image_load_type(&gRAMDiskAddr, &gRAMDiskSize, IMAGE_TYPE_RAMDISK, 0)) {
+			gRAMDiskAddr = 0;
+			gRAMDiskSize = 0;
+			return -1;
+		}
+	}
+
+	if ((gRAMDiskAddr == 0) || (gRAMDiskSize == 0)) {
+		dprintf(DEBUG_INFO, "ramdisk: failed to find ramdisk\n");
+		return -1;
+	}
+
+	/* consolidate environment */
+	security_consolidate_environment();
+
+	*ramdisk_addr = gRAMDiskAddr;
+	*ramdisk_size = gRAMDiskSize;
+
+	return 0;
+}
+

lib/ramdisk/rules.mk

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+# Copyright (C) 2014 Apple Inc. All rights reserved.
+#
+# This document is the property of Apple Inc.
+# It is considered confidential and proprietary.
+#
+# This document may not be reproduced or transmitted in any form,
+# in whole or in part, without the express written permission of
+# Apple Inc.
+#
+
+OPTIONS		+= WITH_RAMDISK=1
+LIBRARY_MODULES	+= lib/ramdisk