dmaengine: fix use-after-free in dma_chan_put() and dma_release_channel()grafted

When dma_device_put() drops the last reference on chan->device->ref,
dma_device_release() runs and may free the dma_device along with its
channels.

dma_chan_put() then still reads chan->device->owner via
dma_chan_to_owner() for the trailing module_put(). KASAN catches it:

	slab-use-after-free in dma_chan_put+0x3e6/0x4c0
	Read of size 8 by task insmod/6319
	Freed by task 6319:
	  kfree+0x225/0x470
	  dma_chan_put+0x395/0x4c0
	  dmaengine_put+0xf8/0x160

Cache the module owner in dma_chan_put() before the put so the trailing
module_put() does not need chan->device.

Fixes: 8ad342a86359 ("dmaengine: Add reference counting to dma_device struct")
Suggested-by: Sashiko <sashiko-bot@kernel.org>
Link: https://sashiko.dev/#/patchset/20260518-dmaengine-kref-fix-v1-1-4d6125048fb7@amd.com
Reviewed-by: Frank Li <Frank.Li@nxp.com>
Reviewed-by: Logan Gunthorpe <logang@deltatee.com>
Signed-off-by: Shivank Garg <shivankg@amd.com>
Link: https://patch.msgid.link/20260822-dmaengine-kref-fix-v5-3-d4a4ee47d927@amd.com
Signed-off-by: Vinod Koul <vkoul@kernel.org>

10 files changed, 5239 insertions, 0 deletions

diff --git a/scripts/mod/.gitignore b/scripts/mod/.gitignore
new file mode 100644
index 000000000..0465ec33c
--- /dev/null
+++ b/scripts/mod/.gitignore
@@ -0,0 +1,5 @@
+# SPDX-License-Identifier: GPL-2.0-only
+/devicetable-offsets.h
+/elfconfig.h
+/mk_elfconfig
+/modpost
diff --git a/scripts/mod/Makefile b/scripts/mod/Makefile
new file mode 100644
index 000000000..c729bc936
--- /dev/null
+++ b/scripts/mod/Makefile
@@ -0,0 +1,27 @@
+# SPDX-License-Identifier: GPL-2.0
+CFLAGS_REMOVE_empty.o += $(CC_FLAGS_LTO)
+
+hostprogs-always-y	+= modpost mk_elfconfig
+always-y		+= empty.o
+
+modpost-objs	:= modpost.o file2alias.o sumversion.o symsearch.o
+
+devicetable-offsets-file := devicetable-offsets.h
+
+$(obj)/$(devicetable-offsets-file): $(obj)/devicetable-offsets.s FORCE
+	$(call filechk,offsets,__DEVICETABLE_OFFSETS_H__)
+
+targets += $(devicetable-offsets-file) devicetable-offsets.s
+
+# dependencies on generated files need to be listed explicitly
+
+$(obj)/modpost.o $(obj)/file2alias.o $(obj)/sumversion.o $(obj)/symsearch.o: $(obj)/elfconfig.h
+$(obj)/file2alias.o: $(obj)/$(devicetable-offsets-file)
+
+quiet_cmd_elfconfig = MKELF   $@
+      cmd_elfconfig = $(obj)/mk_elfconfig < $< > $@
+
+$(obj)/elfconfig.h: $(obj)/empty.o $(obj)/mk_elfconfig FORCE
+	$(call if_changed,elfconfig)
+
+targets += elfconfig.h
diff --git a/scripts/mod/devicetable-offsets.c b/scripts/mod/devicetable-offsets.c
new file mode 100644
index 000000000..b4178c42d
--- /dev/null
+++ b/scripts/mod/devicetable-offsets.c
@@ -0,0 +1,288 @@
+// SPDX-License-Identifier: GPL-2.0
+#define COMPILE_OFFSETS
+#include <linux/kbuild.h>
+#include <linux/mod_devicetable.h>
+
+#define DEVID(devid) DEFINE(SIZE_##devid, sizeof(struct devid))
+#define DEVID_FIELD(devid, field) \
+	DEFINE(OFF_##devid##_##field, offsetof(struct devid, field))
+
+int main(void)
+{
+	DEVID(usb_device_id);
+	DEVID_FIELD(usb_device_id, match_flags);
+	DEVID_FIELD(usb_device_id, idVendor);
+	DEVID_FIELD(usb_device_id, idProduct);
+	DEVID_FIELD(usb_device_id, bcdDevice_lo);
+	DEVID_FIELD(usb_device_id, bcdDevice_hi);
+	DEVID_FIELD(usb_device_id, bDeviceClass);
+	DEVID_FIELD(usb_device_id, bDeviceSubClass);
+	DEVID_FIELD(usb_device_id, bDeviceProtocol);
+	DEVID_FIELD(usb_device_id, bInterfaceClass);
+	DEVID_FIELD(usb_device_id, bInterfaceSubClass);
+	DEVID_FIELD(usb_device_id, bInterfaceProtocol);
+	DEVID_FIELD(usb_device_id, bInterfaceNumber);
+
+	DEVID(hid_device_id);
+	DEVID_FIELD(hid_device_id, bus);
+	DEVID_FIELD(hid_device_id, group);
+	DEVID_FIELD(hid_device_id, vendor);
+	DEVID_FIELD(hid_device_id, product);
+
+	DEVID(ieee1394_device_id);
+	DEVID_FIELD(ieee1394_device_id, match_flags);
+	DEVID_FIELD(ieee1394_device_id, vendor_id);
+	DEVID_FIELD(ieee1394_device_id, model_id);
+	DEVID_FIELD(ieee1394_device_id, specifier_id);
+	DEVID_FIELD(ieee1394_device_id, version);
+
+	DEVID(pci_device_id);
+	DEVID_FIELD(pci_device_id, vendor);
+	DEVID_FIELD(pci_device_id, device);
+	DEVID_FIELD(pci_device_id, subvendor);
+	DEVID_FIELD(pci_device_id, subdevice);
+	DEVID_FIELD(pci_device_id, class);
+	DEVID_FIELD(pci_device_id, class_mask);
+	DEVID_FIELD(pci_device_id, override_only);
+
+	DEVID(ccw_device_id);
+	DEVID_FIELD(ccw_device_id, match_flags);
+	DEVID_FIELD(ccw_device_id, cu_type);
+	DEVID_FIELD(ccw_device_id, cu_model);
+	DEVID_FIELD(ccw_device_id, dev_type);
+	DEVID_FIELD(ccw_device_id, dev_model);
+
+	DEVID(ap_device_id);
+	DEVID_FIELD(ap_device_id, dev_type);
+
+	DEVID(css_device_id);
+	DEVID_FIELD(css_device_id, type);
+
+	DEVID(serio_device_id);
+	DEVID_FIELD(serio_device_id, type);
+	DEVID_FIELD(serio_device_id, proto);
+	DEVID_FIELD(serio_device_id, id);
+	DEVID_FIELD(serio_device_id, extra);
+
+	DEVID(acpi_device_id);
+	DEVID_FIELD(acpi_device_id, id);
+	DEVID_FIELD(acpi_device_id, cls);
+	DEVID_FIELD(acpi_device_id, cls_msk);
+
+	DEVID(pnp_device_id);
+	DEVID_FIELD(pnp_device_id, id);
+
+	DEVID(pnp_card_device_id);
+	DEVID_FIELD(pnp_card_device_id, devs);
+
+	DEVID(pcmcia_device_id);
+	DEVID_FIELD(pcmcia_device_id, match_flags);
+	DEVID_FIELD(pcmcia_device_id, manf_id);
+	DEVID_FIELD(pcmcia_device_id, card_id);
+	DEVID_FIELD(pcmcia_device_id, func_id);
+	DEVID_FIELD(pcmcia_device_id, function);
+	DEVID_FIELD(pcmcia_device_id, device_no);
+	DEVID_FIELD(pcmcia_device_id, prod_id_hash);
+
+	DEVID(of_device_id);
+	DEVID_FIELD(of_device_id, name);
+	DEVID_FIELD(of_device_id, type);
+	DEVID_FIELD(of_device_id, compatible);
+
+	DEVID(vio_device_id);
+	DEVID_FIELD(vio_device_id, type);
+	DEVID_FIELD(vio_device_id, compat);
+
+	DEVID(input_device_id);
+	DEVID_FIELD(input_device_id, flags);
+	DEVID_FIELD(input_device_id, bustype);
+	DEVID_FIELD(input_device_id, vendor);
+	DEVID_FIELD(input_device_id, product);
+	DEVID_FIELD(input_device_id, version);
+	DEVID_FIELD(input_device_id, evbit);
+	DEVID_FIELD(input_device_id, keybit);
+	DEVID_FIELD(input_device_id, relbit);
+	DEVID_FIELD(input_device_id, absbit);
+	DEVID_FIELD(input_device_id, mscbit);
+	DEVID_FIELD(input_device_id, ledbit);
+	DEVID_FIELD(input_device_id, sndbit);
+	DEVID_FIELD(input_device_id, ffbit);
+	DEVID_FIELD(input_device_id, swbit);
+
+	DEVID(eisa_device_id);
+	DEVID_FIELD(eisa_device_id, sig);
+
+	DEVID(parisc_device_id);
+	DEVID_FIELD(parisc_device_id, hw_type);
+	DEVID_FIELD(parisc_device_id, hversion);
+	DEVID_FIELD(parisc_device_id, hversion_rev);
+	DEVID_FIELD(parisc_device_id, sversion);
+
+	DEVID(sdio_device_id);
+	DEVID_FIELD(sdio_device_id, class);
+	DEVID_FIELD(sdio_device_id, vendor);
+	DEVID_FIELD(sdio_device_id, device);
+
+	DEVID(ssb_device_id);
+	DEVID_FIELD(ssb_device_id, vendor);
+	DEVID_FIELD(ssb_device_id, coreid);
+	DEVID_FIELD(ssb_device_id, revision);
+
+	DEVID(bcma_device_id);
+	DEVID_FIELD(bcma_device_id, manuf);
+	DEVID_FIELD(bcma_device_id, id);
+	DEVID_FIELD(bcma_device_id, rev);
+	DEVID_FIELD(bcma_device_id, class);
+
+	DEVID(virtio_device_id);
+	DEVID_FIELD(virtio_device_id, device);
+	DEVID_FIELD(virtio_device_id, vendor);
+
+	DEVID(hv_vmbus_device_id);
+	DEVID_FIELD(hv_vmbus_device_id, guid);
+
+	DEVID(rpmsg_device_id);
+	DEVID_FIELD(rpmsg_device_id, name);
+
+	DEVID(i2c_device_id);
+	DEVID_FIELD(i2c_device_id, name);
+
+	DEVID(i3c_device_id);
+	DEVID_FIELD(i3c_device_id, match_flags);
+	DEVID_FIELD(i3c_device_id, dcr);
+	DEVID_FIELD(i3c_device_id, manuf_id);
+	DEVID_FIELD(i3c_device_id, part_id);
+	DEVID_FIELD(i3c_device_id, extra_info);
+
+	DEVID(slim_device_id);
+	DEVID_FIELD(slim_device_id, manf_id);
+	DEVID_FIELD(slim_device_id, prod_code);
+
+	DEVID(spi_device_id);
+	DEVID_FIELD(spi_device_id, name);
+
+	DEVID(dmi_system_id);
+	DEVID_FIELD(dmi_system_id, matches);
+
+	DEVID(platform_device_id);
+	DEVID_FIELD(platform_device_id, name);
+
+	DEVID(mdio_device_id);
+	DEVID_FIELD(mdio_device_id, phy_id);
+	DEVID_FIELD(mdio_device_id, phy_id_mask);
+
+	DEVID(zorro_device_id);
+	DEVID_FIELD(zorro_device_id, id);
+
+	DEVID(isapnp_device_id);
+	DEVID_FIELD(isapnp_device_id, vendor);
+	DEVID_FIELD(isapnp_device_id, function);
+
+	DEVID(ipack_device_id);
+	DEVID_FIELD(ipack_device_id, format);
+	DEVID_FIELD(ipack_device_id, vendor);
+	DEVID_FIELD(ipack_device_id, device);
+
+	DEVID(amba_id);
+	DEVID_FIELD(amba_id, id);
+	DEVID_FIELD(amba_id, mask);
+
+	DEVID(mips_cdmm_device_id);
+	DEVID_FIELD(mips_cdmm_device_id, type);
+
+	DEVID(x86_cpu_id);
+	DEVID_FIELD(x86_cpu_id, feature);
+	DEVID_FIELD(x86_cpu_id, family);
+	DEVID_FIELD(x86_cpu_id, model);
+	DEVID_FIELD(x86_cpu_id, vendor);
+
+	DEVID(cpu_feature);
+	DEVID_FIELD(cpu_feature, feature);
+
+	DEVID(mcb_device_id);
+	DEVID_FIELD(mcb_device_id, device);
+
+	DEVID(mei_cl_device_id);
+	DEVID_FIELD(mei_cl_device_id, name);
+	DEVID_FIELD(mei_cl_device_id, uuid);
+	DEVID_FIELD(mei_cl_device_id, version);
+
+	DEVID(rio_device_id);
+	DEVID_FIELD(rio_device_id, did);
+	DEVID_FIELD(rio_device_id, vid);
+	DEVID_FIELD(rio_device_id, asm_did);
+	DEVID_FIELD(rio_device_id, asm_vid);
+
+	DEVID(ulpi_device_id);
+	DEVID_FIELD(ulpi_device_id, vendor);
+	DEVID_FIELD(ulpi_device_id, product);
+
+	DEVID(hda_device_id);
+	DEVID_FIELD(hda_device_id, vendor_id);
+	DEVID_FIELD(hda_device_id, rev_id);
+	DEVID_FIELD(hda_device_id, api_version);
+
+	DEVID(sdw_device_id);
+	DEVID_FIELD(sdw_device_id, mfg_id);
+	DEVID_FIELD(sdw_device_id, part_id);
+	DEVID_FIELD(sdw_device_id, sdw_version);
+	DEVID_FIELD(sdw_device_id, class_id);
+
+	DEVID(fsl_mc_device_id);
+	DEVID_FIELD(fsl_mc_device_id, vendor);
+	DEVID_FIELD(fsl_mc_device_id, obj_type);
+
+	DEVID(tb_service_id);
+	DEVID_FIELD(tb_service_id, match_flags);
+	DEVID_FIELD(tb_service_id, protocol_key);
+	DEVID_FIELD(tb_service_id, protocol_id);
+	DEVID_FIELD(tb_service_id, protocol_version);
+	DEVID_FIELD(tb_service_id, protocol_revision);
+
+	DEVID(typec_device_id);
+	DEVID_FIELD(typec_device_id, svid);
+
+	DEVID(tee_client_device_id);
+	DEVID_FIELD(tee_client_device_id, uuid);
+
+	DEVID(wmi_device_id);
+	DEVID_FIELD(wmi_device_id, guid_string);
+
+	DEVID(mhi_device_id);
+	DEVID_FIELD(mhi_device_id, chan);
+
+	DEVID(auxiliary_device_id);
+	DEVID_FIELD(auxiliary_device_id, name);
+
+	DEVID(ssam_device_id);
+	DEVID_FIELD(ssam_device_id, match_flags);
+	DEVID_FIELD(ssam_device_id, domain);
+	DEVID_FIELD(ssam_device_id, category);
+	DEVID_FIELD(ssam_device_id, target);
+	DEVID_FIELD(ssam_device_id, instance);
+	DEVID_FIELD(ssam_device_id, function);
+
+	DEVID(dfl_device_id);
+	DEVID_FIELD(dfl_device_id, type);
+	DEVID_FIELD(dfl_device_id, feature_id);
+
+	DEVID(ishtp_device_id);
+	DEVID_FIELD(ishtp_device_id, guid);
+
+	DEVID(cdx_device_id);
+	DEVID_FIELD(cdx_device_id, vendor);
+	DEVID_FIELD(cdx_device_id, device);
+	DEVID_FIELD(cdx_device_id, subvendor);
+	DEVID_FIELD(cdx_device_id, subdevice);
+	DEVID_FIELD(cdx_device_id, class);
+	DEVID_FIELD(cdx_device_id, class_mask);
+	DEVID_FIELD(cdx_device_id, override_only);
+
+	DEVID(vchiq_device_id);
+	DEVID_FIELD(vchiq_device_id, name);
+
+	DEVID(coreboot_device_id);
+	DEVID_FIELD(coreboot_device_id, tag);
+
+	return 0;
+}
diff --git a/scripts/mod/empty.c b/scripts/mod/empty.c
new file mode 100644
index 000000000..49839cc4f
--- /dev/null
+++ b/scripts/mod/empty.c
@@ -0,0 +1 @@
+/* empty file to figure out endianness / word size */
diff --git a/scripts/mod/file2alias.c b/scripts/mod/file2alias.c
new file mode 100644
index 000000000..8d36c74de
--- /dev/null
+++ b/scripts/mod/file2alias.c
@@ -0,0 +1,1610 @@
+/* Simple code to turn various tables in an ELF file into alias definitions.
+ * This deals with kernel datastructures where they should be
+ * dealt with: in the kernel source.
+ *
+ * Copyright 2002-2003  Rusty Russell, IBM Corporation
+ *           2003       Kai Germaschewski
+ *
+ *
+ * This software may be used and distributed according to the terms
+ * of the GNU General Public License, incorporated herein by reference.
+ */
+
+#include <stdarg.h>
+#include <stdio.h>
+
+#include "list.h"
+#include "xalloc.h"
+
+#include "modpost.h"
+#include "devicetable-offsets.h"
+
+/* We use the ELF typedefs for kernel_ulong_t but bite the bullet and
+ * use either stdint.h or inttypes.h for the rest. */
+#if KERNEL_ELFCLASS == ELFCLASS32
+typedef Elf32_Addr	kernel_ulong_t;
+#define BITS_PER_LONG 32
+#else
+typedef Elf64_Addr	kernel_ulong_t;
+#define BITS_PER_LONG 64
+#endif
+#ifdef __sun__
+#include <inttypes.h>
+#else
+#include <stdint.h>
+#endif
+
+#include <ctype.h>
+#include <stdbool.h>
+
+/**
+ * module_alias_printf - add auto-generated MODULE_ALIAS()
+ *
+ * @mod: module
+ * @append_wildcard: append '*' for future extension if not exist yet
+ * @fmt: printf(3)-like format
+ */
+static void __attribute__((format (printf, 3, 4)))
+module_alias_printf(struct module *mod, bool append_wildcard,
+		    const char *fmt, ...)
+{
+	struct module_alias *new, *als;
+	size_t len;
+	int n;
+	va_list ap;
+
+	/* Determine required size. */
+	va_start(ap, fmt);
+	n = vsnprintf(NULL, 0, fmt, ap);
+	va_end(ap);
+
+	if (n < 0) {
+		error("vsnprintf failed\n");
+		return;
+	}
+
+	len = n + 1;	/* extra byte for '\0' */
+
+	if (append_wildcard)
+		len++;	/* extra byte for '*' */
+
+	new = xmalloc(sizeof(*new) + len);
+
+	/* Now, really print it to the allocated buffer */
+	va_start(ap, fmt);
+	n = vsnprintf(new->str, len, fmt, ap);
+	va_end(ap);
+
+	if (n < 0) {
+		error("vsnprintf failed\n");
+		free(new);
+		return;
+	}
+
+	if (append_wildcard && (n == 0 || new->str[n - 1] != '*')) {
+		new->str[n] = '*';
+		new->str[n + 1] = '\0';
+	}
+
+	/* avoid duplication */
+	list_for_each_entry(als, &mod->aliases, node) {
+		if (!strcmp(als->str, new->str)) {
+			free(new);
+			return;
+		}
+	}
+
+	new->builtin_modname = NULL;
+	list_add_tail(&new->node, &mod->aliases);
+}
+
+typedef uint32_t	__u32;
+typedef uint16_t	__u16;
+typedef unsigned char	__u8;
+
+/* UUID types for backward compatibility, don't use in new code */
+typedef struct {
+	__u8 b[16];
+} guid_t;
+
+typedef struct {
+	__u8 b[16];
+} uuid_t;
+
+#define	UUID_STRING_LEN		36
+
+/* MEI UUID type, don't use anywhere else */
+typedef struct {
+	__u8 b[16];
+} uuid_le;
+
+/* Big exception to the "don't include kernel headers into userspace, which
+ * even potentially has different endianness and word sizes, since
+ * we handle those differences explicitly below */
+#include "../../include/linux/mod_devicetable.h"
+
+struct devtable {
+	const char *device_id;
+	unsigned long id_size;
+	void (*do_entry)(struct module *mod, void *symval);
+};
+
+/* Define a variable f that holds the value of field f of struct devid
+ * based at address m.
+ */
+#define DEF_FIELD(m, devid, f) \
+	typeof(((struct devid *)0)->f) f = \
+		get_unaligned_native((typeof(f) *)((m) + OFF_##devid##_##f))
+
+/* Define a variable f that holds the address of field f of struct devid
+ * based at address m.  Due to the way typeof works, for a field of type
+ * T[N] the variable has type T(*)[N], _not_ T*.
+ */
+#define DEF_FIELD_ADDR(m, devid, f) \
+	typeof(((struct devid *)0)->f) *f = ((m) + OFF_##devid##_##f)
+
+#define ADD(str, sep, cond, field)                              \
+do {                                                            \
+        strcat(str, sep);                                       \
+        if (cond)                                               \
+                sprintf(str + strlen(str),                      \
+                        sizeof(field) == 1 ? "%02X" :           \
+                        sizeof(field) == 2 ? "%04X" :           \
+                        sizeof(field) == 4 ? "%08X" : "",       \
+                        field);                                 \
+        else                                                    \
+                sprintf(str + strlen(str), "*");                \
+} while(0)
+
+static inline void add_uuid(char *str, uuid_le uuid)
+{
+	int len = strlen(str);
+
+	sprintf(str + len, "%02x%02x%02x%02x-%02x%02x-%02x%02x-%02x%02x-%02x%02x%02x%02x%02x%02x",
+		uuid.b[3], uuid.b[2], uuid.b[1], uuid.b[0],
+		uuid.b[5], uuid.b[4], uuid.b[7], uuid.b[6],
+		uuid.b[8], uuid.b[9], uuid.b[10], uuid.b[11],
+		uuid.b[12], uuid.b[13], uuid.b[14], uuid.b[15]);
+}
+
+static inline void add_guid(char *str, guid_t guid)
+{
+	int len = strlen(str);
+
+	sprintf(str + len, "%02X%02X%02X%02X-%02X%02X-%02X%02X-%02X%02X-%02X%02X%02X%02X%02X%02X",
+		guid.b[3], guid.b[2], guid.b[1], guid.b[0],
+		guid.b[5], guid.b[4], guid.b[7], guid.b[6],
+		guid.b[8], guid.b[9], guid.b[10], guid.b[11],
+		guid.b[12], guid.b[13], guid.b[14], guid.b[15]);
+}
+
+/* USB is special because the bcdDevice can be matched against a numeric range */
+/* Looks like "usb:vNpNdNdcNdscNdpNicNiscNipNinN" */
+static void do_usb_entry(void *symval,
+			 unsigned int bcdDevice_initial, int bcdDevice_initial_digits,
+			 unsigned char range_lo, unsigned char range_hi,
+			 unsigned char max, struct module *mod)
+{
+	char alias[500];
+	DEF_FIELD(symval, usb_device_id, match_flags);
+	DEF_FIELD(symval, usb_device_id, idVendor);
+	DEF_FIELD(symval, usb_device_id, idProduct);
+	DEF_FIELD(symval, usb_device_id, bcdDevice_lo);
+	DEF_FIELD(symval, usb_device_id, bDeviceClass);
+	DEF_FIELD(symval, usb_device_id, bDeviceSubClass);
+	DEF_FIELD(symval, usb_device_id, bDeviceProtocol);
+	DEF_FIELD(symval, usb_device_id, bInterfaceClass);
+	DEF_FIELD(symval, usb_device_id, bInterfaceSubClass);
+	DEF_FIELD(symval, usb_device_id, bInterfaceProtocol);
+	DEF_FIELD(symval, usb_device_id, bInterfaceNumber);
+
+	strcpy(alias, "usb:");
+	ADD(alias, "v", match_flags&USB_DEVICE_ID_MATCH_VENDOR,
+	    idVendor);
+	ADD(alias, "p", match_flags&USB_DEVICE_ID_MATCH_PRODUCT,
+	    idProduct);
+
+	strcat(alias, "d");
+	if (bcdDevice_initial_digits)
+		sprintf(alias + strlen(alias), "%0*X",
+			bcdDevice_initial_digits, bcdDevice_initial);
+	if (range_lo == range_hi)
+		sprintf(alias + strlen(alias), "%X", range_lo);
+	else if (range_lo > 0 || range_hi < max) {
+		if (range_lo > 0x9 || range_hi < 0xA)
+			sprintf(alias + strlen(alias),
+				"[%X-%X]",
+				range_lo,
+				range_hi);
+		else {
+			sprintf(alias + strlen(alias),
+				range_lo < 0x9 ? "[%X-9" : "[%X",
+				range_lo);
+			sprintf(alias + strlen(alias),
+				range_hi > 0xA ? "A-%X]" : "%X]",
+				range_hi);
+		}
+	}
+	if (bcdDevice_initial_digits < (sizeof(bcdDevice_lo) * 2 - 1))
+		strcat(alias, "*");
+
+	ADD(alias, "dc", match_flags&USB_DEVICE_ID_MATCH_DEV_CLASS,
+	    bDeviceClass);
+	ADD(alias, "dsc", match_flags&USB_DEVICE_ID_MATCH_DEV_SUBCLASS,
+	    bDeviceSubClass);
+	ADD(alias, "dp", match_flags&USB_DEVICE_ID_MATCH_DEV_PROTOCOL,
+	    bDeviceProtocol);
+	ADD(alias, "ic", match_flags&USB_DEVICE_ID_MATCH_INT_CLASS,
+	    bInterfaceClass);
+	ADD(alias, "isc", match_flags&USB_DEVICE_ID_MATCH_INT_SUBCLASS,
+	    bInterfaceSubClass);
+	ADD(alias, "ip", match_flags&USB_DEVICE_ID_MATCH_INT_PROTOCOL,
+	    bInterfaceProtocol);
+	ADD(alias, "in", match_flags&USB_DEVICE_ID_MATCH_INT_NUMBER,
+	    bInterfaceNumber);
+
+	module_alias_printf(mod, true, "%s", alias);
+}
+
+/* Handles increment/decrement of BCD formatted integers */
+/* Returns the previous value, so it works like i++ or i-- */
+static unsigned int incbcd(unsigned int *bcd,
+			   int inc,
+			   unsigned char max,
+			   size_t chars)
+{
+	unsigned int init = *bcd, i, j;
+	unsigned long long c, dec = 0;
+
+	/* If bcd is not in BCD format, just increment */
+	if (max > 0x9) {
+		*bcd += inc;
+		return init;
+	}
+
+	/* Convert BCD to Decimal */
+	for (i=0 ; i < chars ; i++) {
+		c = (*bcd >> (i << 2)) & 0xf;
+		c = c > 9 ? 9 : c; /* force to bcd just in case */
+		for (j=0 ; j < i ; j++)
+			c = c * 10;
+		dec += c;
+	}
+
+	/* Do our increment/decrement */
+	dec += inc;
+	*bcd  = 0;
+
+	/* Convert back to BCD */
+	for (i=0 ; i < chars ; i++) {
+		for (c=1,j=0 ; j < i ; j++)
+			c = c * 10;
+		c = (dec / c) % 10;
+		*bcd += c << (i << 2);
+	}
+	return init;
+}
+
+static void do_usb_entry_multi(struct module *mod, void *symval)
+{
+	unsigned int devlo, devhi;
+	unsigned char chi, clo, max;
+	int ndigits;
+
+	DEF_FIELD(symval, usb_device_id, match_flags);
+	DEF_FIELD(symval, usb_device_id, idVendor);
+	DEF_FIELD(symval, usb_device_id, idProduct);
+	DEF_FIELD(symval, usb_device_id, bcdDevice_lo);
+	DEF_FIELD(symval, usb_device_id, bcdDevice_hi);
+	DEF_FIELD(symval, usb_device_id, bDeviceClass);
+	DEF_FIELD(symval, usb_device_id, bInterfaceClass);
+
+	devlo = match_flags & USB_DEVICE_ID_MATCH_DEV_LO ?
+		bcdDevice_lo : 0x0U;
+	devhi = match_flags & USB_DEVICE_ID_MATCH_DEV_HI ?
+		bcdDevice_hi : ~0x0U;
+
+	/* Figure out if this entry is in bcd or hex format */
+	max = 0x9; /* Default to decimal format */
+	for (ndigits = 0 ; ndigits < sizeof(bcdDevice_lo) * 2 ; ndigits++) {
+		clo = (devlo >> (ndigits << 2)) & 0xf;
+		chi = ((devhi > 0x9999 ? 0x9999 : devhi) >> (ndigits << 2)) & 0xf;
+		if (clo > max || chi > max) {
+			max = 0xf;
+			break;
+		}
+	}
+
+	/*
+	 * Some modules (visor) have empty slots as placeholder for
+	 * run-time specification that results in catch-all alias
+	 */
+	if (!(idVendor | idProduct | bDeviceClass | bInterfaceClass))
+		return;
+
+	/* Convert numeric bcdDevice range into fnmatch-able pattern(s) */
+	for (ndigits = sizeof(bcdDevice_lo) * 2 - 1; devlo <= devhi; ndigits--) {
+		clo = devlo & 0xf;
+		chi = devhi & 0xf;
+		if (chi > max)	/* If we are in bcd mode, truncate if necessary */
+			chi = max;
+		devlo >>= 4;
+		devhi >>= 4;
+
+		if (devlo == devhi || !ndigits) {
+			do_usb_entry(symval, devlo, ndigits, clo, chi, max, mod);
+			break;
+		}
+
+		if (clo > 0x0)
+			do_usb_entry(symval,
+				     incbcd(&devlo, 1, max,
+					    sizeof(bcdDevice_lo) * 2),
+				     ndigits, clo, max, max, mod);
+
+		if (chi < max)
+			do_usb_entry(symval,
+				     incbcd(&devhi, -1, max,
+					    sizeof(bcdDevice_lo) * 2),
+				     ndigits, 0x0, chi, max, mod);
+	}
+}
+
+static void do_of_entry(struct module *mod, void *symval)
+{
+	char alias[500];
+	int len;
+	char *tmp;
+
+	DEF_FIELD_ADDR(symval, of_device_id, name);
+	DEF_FIELD_ADDR(symval, of_device_id, type);
+	DEF_FIELD_ADDR(symval, of_device_id, compatible);
+
+	len = sprintf(alias, "of:N%sT%s", (*name)[0] ? *name : "*",
+		      (*type)[0] ? *type : "*");
+
+	if ((*compatible)[0])
+		sprintf(&alias[len], "%sC%s", (*type)[0] ? "*" : "",
+			*compatible);
+
+	/* Replace all whitespace with underscores */
+	for (tmp = alias; tmp && *tmp; tmp++)
+		if (isspace(*tmp))
+			*tmp = '_';
+
+	module_alias_printf(mod, false, "%s", alias);
+	module_alias_printf(mod, false, "%sC*", alias);
+}
+
+/* Looks like: hid:bNvNpN */
+static void do_hid_entry(struct module *mod, void *symval)
+{
+	char alias[256] = {};
+
+	DEF_FIELD(symval, hid_device_id, bus);
+	DEF_FIELD(symval, hid_device_id, group);
+	DEF_FIELD(symval, hid_device_id, vendor);
+	DEF_FIELD(symval, hid_device_id, product);
+
+	ADD(alias, "b", bus != HID_BUS_ANY, bus);
+	ADD(alias, "g", group != HID_GROUP_ANY, group);
+	ADD(alias, "v", vendor != HID_ANY_ID, vendor);
+	ADD(alias, "p", product != HID_ANY_ID, product);
+
+	module_alias_printf(mod, false, "hid:%s", alias);
+}
+
+/* Looks like: ieee1394:venNmoNspNverN */
+static void do_ieee1394_entry(struct module *mod, void *symval)
+{
+	char alias[256] = {};
+
+	DEF_FIELD(symval, ieee1394_device_id, match_flags);
+	DEF_FIELD(symval, ieee1394_device_id, vendor_id);
+	DEF_FIELD(symval, ieee1394_device_id, model_id);
+	DEF_FIELD(symval, ieee1394_device_id, specifier_id);
+	DEF_FIELD(symval, ieee1394_device_id, version);
+
+	ADD(alias, "ven", match_flags & IEEE1394_MATCH_VENDOR_ID,
+	    vendor_id);
+	ADD(alias, "mo", match_flags & IEEE1394_MATCH_MODEL_ID,
+	    model_id);
+	ADD(alias, "sp", match_flags & IEEE1394_MATCH_SPECIFIER_ID,
+	    specifier_id);
+	ADD(alias, "ver", match_flags & IEEE1394_MATCH_VERSION,
+	    version);
+
+	module_alias_printf(mod, true, "ieee1394:%s", alias);
+}
+
+/* Looks like: pci:vNdNsvNsdNbcNscNiN or <prefix>_pci:vNdNsvNsdNbcNscNiN. */
+static void do_pci_entry(struct module *mod, void *symval)
+{
+	char alias[256];
+	/* Class field can be divided into these three. */
+	unsigned char baseclass, subclass, interface,
+		baseclass_mask, subclass_mask, interface_mask;
+
+	DEF_FIELD(symval, pci_device_id, vendor);
+	DEF_FIELD(symval, pci_device_id, device);
+	DEF_FIELD(symval, pci_device_id, subvendor);
+	DEF_FIELD(symval, pci_device_id, subdevice);
+	DEF_FIELD(symval, pci_device_id, class);
+	DEF_FIELD(symval, pci_device_id, class_mask);
+	DEF_FIELD(symval, pci_device_id, override_only);
+
+	switch (override_only) {
+	case 0:
+		strcpy(alias, "pci:");
+		break;
+	case PCI_ID_F_VFIO_DRIVER_OVERRIDE:
+		strcpy(alias, "vfio_pci:");
+		break;
+	default:
+		warn("Unknown PCI driver_override alias %08X\n",
+		     override_only);
+	}
+
+	ADD(alias, "v", vendor != PCI_ANY_ID, vendor);
+	ADD(alias, "d", device != PCI_ANY_ID, device);
+	ADD(alias, "sv", subvendor != PCI_ANY_ID, subvendor);
+	ADD(alias, "sd", subdevice != PCI_ANY_ID, subdevice);
+
+	baseclass = (class) >> 16;
+	baseclass_mask = (class_mask) >> 16;
+	subclass = (class) >> 8;
+	subclass_mask = (class_mask) >> 8;
+	interface = class;
+	interface_mask = class_mask;
+
+	if ((baseclass_mask != 0 && baseclass_mask != 0xFF)
+	    || (subclass_mask != 0 && subclass_mask != 0xFF)
+	    || (interface_mask != 0 && interface_mask != 0xFF)) {
+		warn("Can't handle masks in %s:%04X\n",
+		     mod->name, class_mask);
+		return;
+	}
+
+	ADD(alias, "bc", baseclass_mask == 0xFF, baseclass);
+	ADD(alias, "sc", subclass_mask == 0xFF, subclass);
+	ADD(alias, "i", interface_mask == 0xFF, interface);
+
+	module_alias_printf(mod, true, "%s", alias);
+}
+
+/* looks like: "ccw:tNmNdtNdmN" */
+static void do_ccw_entry(struct module *mod, void *symval)
+{
+	char alias[256] = {};
+
+	DEF_FIELD(symval, ccw_device_id, match_flags);
+	DEF_FIELD(symval, ccw_device_id, cu_type);
+	DEF_FIELD(symval, ccw_device_id, cu_model);
+	DEF_FIELD(symval, ccw_device_id, dev_type);
+	DEF_FIELD(symval, ccw_device_id, dev_model);
+
+	ADD(alias, "t", match_flags&CCW_DEVICE_ID_MATCH_CU_TYPE,
+	    cu_type);
+	ADD(alias, "m", match_flags&CCW_DEVICE_ID_MATCH_CU_MODEL,
+	    cu_model);
+	ADD(alias, "dt", match_flags&CCW_DEVICE_ID_MATCH_DEVICE_TYPE,
+	    dev_type);
+	ADD(alias, "dm", match_flags&CCW_DEVICE_ID_MATCH_DEVICE_MODEL,
+	    dev_model);
+
+	module_alias_printf(mod, true, "ccw:%s", alias);
+}
+
+/* looks like: "ap:tN" */
+static void do_ap_entry(struct module *mod, void *symval)
+{
+	DEF_FIELD(symval, ap_device_id, dev_type);
+
+	module_alias_printf(mod, false, "ap:t%02X*", dev_type);
+}
+
+/* looks like: "css:tN" */
+static void do_css_entry(struct module *mod, void *symval)
+{
+	DEF_FIELD(symval, css_device_id, type);
+
+	module_alias_printf(mod, false, "css:t%01X", type);
+}
+
+/* Looks like: "serio:tyNprNidNexN" */
+static void do_serio_entry(struct module *mod, void *symval)
+{
+	char alias[256] = {};
+
+	DEF_FIELD(symval, serio_device_id, type);
+	DEF_FIELD(symval, serio_device_id, proto);
+	DEF_FIELD(symval, serio_device_id, id);
+	DEF_FIELD(symval, serio_device_id, extra);
+
+	ADD(alias, "ty", type != SERIO_ANY, type);
+	ADD(alias, "pr", proto != SERIO_ANY, proto);
+	ADD(alias, "id", id != SERIO_ANY, id);
+	ADD(alias, "ex", extra != SERIO_ANY, extra);
+
+	module_alias_printf(mod, true, "serio:%s", alias);
+}
+
+/* looks like: "acpi:ACPI0003" or "acpi:PNP0C0B" or "acpi:LNXVIDEO" or
+ *             "acpi:bbsspp" (bb=base-class, ss=sub-class, pp=prog-if)
+ *
+ * NOTE: Each driver should use one of the following : _HID, _CIDs
+ *       or _CLS. Also, bb, ss, and pp can be substituted with ??
+ *       as don't care byte.
+ */
+static void do_acpi_entry(struct module *mod, void *symval)
+{
+	DEF_FIELD_ADDR(symval, acpi_device_id, id);
+	DEF_FIELD(symval, acpi_device_id, cls);
+	DEF_FIELD(symval, acpi_device_id, cls_msk);
+
+	if ((*id)[0])
+		module_alias_printf(mod, false, "acpi*:%s:*", *id);
+	else {
+		char alias[256];
+		int i, byte_shift, cnt = 0;
+		unsigned int msk;
+
+		for (i = 1; i <= 3; i++) {
+			byte_shift = 8 * (3-i);
+			msk = (cls_msk >> byte_shift) & 0xFF;
+			if (msk)
+				sprintf(&alias[cnt], "%02x",
+					(cls >> byte_shift) & 0xFF);
+			else
+				sprintf(&alias[cnt], "??");
+			cnt += 2;
+		}
+		module_alias_printf(mod, false, "acpi*:%s:*", alias);
+	}
+}
+
+/* looks like: "pnp:dD" */
+static void do_pnp_device_entry(struct module *mod, void *symval)
+{
+	DEF_FIELD_ADDR(symval, pnp_device_id, id);
+	char acpi_id[sizeof(*id)];
+
+	/* fix broken pnp bus lowercasing */
+	for (unsigned int i = 0; i < sizeof(acpi_id); i++)
+		acpi_id[i] = toupper((*id)[i]);
+	module_alias_printf(mod, false, "pnp:d%s*", *id);
+	module_alias_printf(mod, false, "acpi*:%s:*", acpi_id);
+}
+
+/* looks like: "pnp:dD" for every device of the card */
+static void do_pnp_card_entry(struct module *mod, void *symval)
+{
+	DEF_FIELD_ADDR(symval, pnp_card_device_id, devs);
+
+	for (unsigned int i = 0; i < PNP_MAX_DEVICES; i++) {
+		const char *id = (char *)(*devs)[i].id;
+		char acpi_id[PNP_ID_LEN];
+
+		if (!id[0])
+			break;
+
+		/* fix broken pnp bus lowercasing */
+		for (unsigned int j = 0; j < sizeof(acpi_id); j++)
+			acpi_id[j] = toupper(id[j]);
+
+		/* add an individual alias for every device entry */
+		module_alias_printf(mod, false, "pnp:d%s*", id);
+		module_alias_printf(mod, false, "acpi*:%s:*", acpi_id);
+	}
+}
+
+/* Looks like: pcmcia:mNcNfNfnNpfnNvaNvbNvcNvdN. */
+static void do_pcmcia_entry(struct module *mod, void *symval)
+{
+	char alias[256] = {};
+
+	DEF_FIELD(symval, pcmcia_device_id, match_flags);
+	DEF_FIELD(symval, pcmcia_device_id, manf_id);
+	DEF_FIELD(symval, pcmcia_device_id, card_id);
+	DEF_FIELD(symval, pcmcia_device_id, func_id);
+	DEF_FIELD(symval, pcmcia_device_id, function);
+	DEF_FIELD(symval, pcmcia_device_id, device_no);
+	DEF_FIELD_ADDR(symval, pcmcia_device_id, prod_id_hash);
+
+	ADD(alias, "m", match_flags & PCMCIA_DEV_ID_MATCH_MANF_ID,
+	    manf_id);
+	ADD(alias, "c", match_flags & PCMCIA_DEV_ID_MATCH_CARD_ID,
+	    card_id);
+	ADD(alias, "f", match_flags & PCMCIA_DEV_ID_MATCH_FUNC_ID,
+	    func_id);
+	ADD(alias, "fn", match_flags & PCMCIA_DEV_ID_MATCH_FUNCTION,
+	    function);
+	ADD(alias, "pfn", match_flags & PCMCIA_DEV_ID_MATCH_DEVICE_NO,
+	    device_no);
+	ADD(alias, "pa", match_flags & PCMCIA_DEV_ID_MATCH_PROD_ID1,
+	    get_unaligned_native(*prod_id_hash + 0));
+	ADD(alias, "pb", match_flags & PCMCIA_DEV_ID_MATCH_PROD_ID2,
+	    get_unaligned_native(*prod_id_hash + 1));
+	ADD(alias, "pc", match_flags & PCMCIA_DEV_ID_MATCH_PROD_ID3,
+	    get_unaligned_native(*prod_id_hash + 2));
+	ADD(alias, "pd", match_flags & PCMCIA_DEV_ID_MATCH_PROD_ID4,
+	    get_unaligned_native(*prod_id_hash + 3));
+
+	module_alias_printf(mod, true, "pcmcia:%s", alias);
+}
+
+static void do_vio_entry(struct module *mod, void *symval)
+{
+	char alias[256];
+	char *tmp;
+	DEF_FIELD_ADDR(symval, vio_device_id, type);
+	DEF_FIELD_ADDR(symval, vio_device_id, compat);
+
+	sprintf(alias, "vio:T%sS%s", (*type)[0] ? *type : "*",
+			(*compat)[0] ? *compat : "*");
+
+	/* Replace all whitespace with underscores */
+	for (tmp = alias; tmp && *tmp; tmp++)
+		if (isspace (*tmp))
+			*tmp = '_';
+
+	module_alias_printf(mod, true, "%s", alias);
+}
+
+static void __attribute__((format(printf, 3, 4)))
+alias_append(char *alias, size_t size, const char *fmt, ...)
+{
+	size_t len = strlen(alias);
+	va_list args;
+	int n;
+
+	if (len >= size)
+		fatal("alias buffer (%zu) overflow before append\n", size);
+
+	va_start(args, fmt);
+	n = vsnprintf(alias + len, size - len, fmt, args);
+	va_end(args);
+
+	if (n < 0 || (size_t)n >= size - len)
+		fatal("alias buffer (%zu) overflow on append (need %d, have %zu)\n",
+		      size, n, size - len);
+}
+
+static void do_input(char *alias, size_t size,
+		     kernel_ulong_t *arr, unsigned int min, unsigned int max)
+{
+	unsigned int i;
+
+	for (i = min; i <= max; i++)
+		if (get_unaligned_native(arr + i / BITS_PER_LONG) &
+		    (1ULL << (i % BITS_PER_LONG)))
+			alias_append(alias, size, "%X,*", i);
+}
+
+/* input:b0v0p0e0-eXkXrXaXmXlXsXfXwX where X is comma-separated %02X. */
+static void do_input_entry(struct module *mod, void *symval)
+{
+	char alias[256] = {};
+	const size_t sizeof_alias = sizeof(alias);
+
+	DEF_FIELD(symval, input_device_id, flags);
+	DEF_FIELD(symval, input_device_id, bustype);
+	DEF_FIELD(symval, input_device_id, vendor);
+	DEF_FIELD(symval, input_device_id, product);
+	DEF_FIELD(symval, input_device_id, version);
+	DEF_FIELD_ADDR(symval, input_device_id, evbit);
+	DEF_FIELD_ADDR(symval, input_device_id, keybit);
+	DEF_FIELD_ADDR(symval, input_device_id, relbit);
+	DEF_FIELD_ADDR(symval, input_device_id, absbit);
+	DEF_FIELD_ADDR(symval, input_device_id, mscbit);
+	DEF_FIELD_ADDR(symval, input_device_id, ledbit);
+	DEF_FIELD_ADDR(symval, input_device_id, sndbit);
+	DEF_FIELD_ADDR(symval, input_device_id, ffbit);
+	DEF_FIELD_ADDR(symval, input_device_id, swbit);
+
+	ADD(alias, "b", flags & INPUT_DEVICE_ID_MATCH_BUS, bustype);
+	ADD(alias, "v", flags & INPUT_DEVICE_ID_MATCH_VENDOR, vendor);
+	ADD(alias, "p", flags & INPUT_DEVICE_ID_MATCH_PRODUCT, product);
+	ADD(alias, "e", flags & INPUT_DEVICE_ID_MATCH_VERSION, version);
+
+	alias_append(alias, sizeof_alias, "-e*");
+	if (flags & INPUT_DEVICE_ID_MATCH_EVBIT)
+		do_input(alias, sizeof_alias, *evbit, 0, INPUT_DEVICE_ID_EV_MAX);
+	alias_append(alias, sizeof_alias, "k*");
+	if (flags & INPUT_DEVICE_ID_MATCH_KEYBIT)
+		do_input(alias, sizeof_alias, *keybit,
+			 INPUT_DEVICE_ID_KEY_MIN_INTERESTING,
+			 INPUT_DEVICE_ID_KEY_MAX);
+	alias_append(alias, sizeof_alias, "r*");
+	if (flags & INPUT_DEVICE_ID_MATCH_RELBIT)
+		do_input(alias, sizeof_alias, *relbit, 0, INPUT_DEVICE_ID_REL_MAX);
+	alias_append(alias, sizeof_alias, "a*");
+	if (flags & INPUT_DEVICE_ID_MATCH_ABSBIT)
+		do_input(alias, sizeof_alias, *absbit, 0, INPUT_DEVICE_ID_ABS_MAX);
+	alias_append(alias, sizeof_alias, "m*");
+	if (flags & INPUT_DEVICE_ID_MATCH_MSCIT)
+		do_input(alias, sizeof_alias, *mscbit, 0, INPUT_DEVICE_ID_MSC_MAX);
+	alias_append(alias, sizeof_alias, "l*");
+	if (flags & INPUT_DEVICE_ID_MATCH_LEDBIT)
+		do_input(alias, sizeof_alias, *ledbit, 0, INPUT_DEVICE_ID_LED_MAX);
+	alias_append(alias, sizeof_alias, "s*");
+	if (flags & INPUT_DEVICE_ID_MATCH_SNDBIT)
+		do_input(alias, sizeof_alias, *sndbit, 0, INPUT_DEVICE_ID_SND_MAX);
+	alias_append(alias, sizeof_alias, "f*");
+	if (flags & INPUT_DEVICE_ID_MATCH_FFBIT)
+		do_input(alias, sizeof_alias, *ffbit, 0, INPUT_DEVICE_ID_FF_MAX);
+	alias_append(alias, sizeof_alias, "w*");
+	if (flags & INPUT_DEVICE_ID_MATCH_SWBIT)
+		do_input(alias, sizeof_alias, *swbit, 0, INPUT_DEVICE_ID_SW_MAX);
+
+	module_alias_printf(mod, false, "input:%s", alias);
+}
+
+static void do_eisa_entry(struct module *mod, void *symval)
+{
+	DEF_FIELD_ADDR(symval, eisa_device_id, sig);
+	module_alias_printf(mod, false, EISA_DEVICE_MODALIAS_FMT "*", *sig);
+}
+
+/* Looks like: parisc:tNhvNrevNsvN */
+static void do_parisc_entry(struct module *mod, void *symval)
+{
+	char alias[256] = {};
+
+	DEF_FIELD(symval, parisc_device_id, hw_type);
+	DEF_FIELD(symval, parisc_device_id, hversion);
+	DEF_FIELD(symval, parisc_device_id, hversion_rev);
+	DEF_FIELD(symval, parisc_device_id, sversion);
+
+	ADD(alias, "t", hw_type != PA_HWTYPE_ANY_ID, hw_type);
+	ADD(alias, "hv", hversion != PA_HVERSION_ANY_ID, hversion);
+	ADD(alias, "rev", hversion_rev != PA_HVERSION_REV_ANY_ID, hversion_rev);
+	ADD(alias, "sv", sversion != PA_SVERSION_ANY_ID, sversion);
+
+	module_alias_printf(mod, true, "parisc:%s", alias);
+}
+
+/* Looks like: sdio:cNvNdN. */
+static void do_sdio_entry(struct module *mod, void *symval)
+{
+	char alias[256] = {};
+
+	DEF_FIELD(symval, sdio_device_id, class);
+	DEF_FIELD(symval, sdio_device_id, vendor);
+	DEF_FIELD(symval, sdio_device_id, device);
+
+	ADD(alias, "c", class != (__u8)SDIO_ANY_ID, class);
+	ADD(alias, "v", vendor != (__u16)SDIO_ANY_ID, vendor);
+	ADD(alias, "d", device != (__u16)SDIO_ANY_ID, device);
+
+	module_alias_printf(mod, true, "sdio:%s", alias);
+}
+
+/* Looks like: ssb:vNidNrevN. */
+static void do_ssb_entry(struct module *mod, void *symval)
+{
+	char alias[256] = {};
+
+	DEF_FIELD(symval, ssb_device_id, vendor);
+	DEF_FIELD(symval, ssb_device_id, coreid);
+	DEF_FIELD(symval, ssb_device_id, revision);
+
+	ADD(alias, "v", vendor != SSB_ANY_VENDOR, vendor);
+	ADD(alias, "id", coreid != SSB_ANY_ID, coreid);
+	ADD(alias, "rev", revision != SSB_ANY_REV, revision);
+
+	module_alias_printf(mod, true, "ssb:%s", alias);
+}
+
+/* Looks like: bcma:mNidNrevNclN. */
+static void do_bcma_entry(struct module *mod, void *symval)
+{
+	char alias[256] = {};
+
+	DEF_FIELD(symval, bcma_device_id, manuf);
+	DEF_FIELD(symval, bcma_device_id, id);
+	DEF_FIELD(symval, bcma_device_id, rev);
+	DEF_FIELD(symval, bcma_device_id, class);
+
+	ADD(alias, "m", manuf != BCMA_ANY_MANUF, manuf);
+	ADD(alias, "id", id != BCMA_ANY_ID, id);
+	ADD(alias, "rev", rev != BCMA_ANY_REV, rev);
+	ADD(alias, "cl", class != BCMA_ANY_CLASS, class);
+
+	module_alias_printf(mod, true, "bcma:%s", alias);
+}
+
+/* Looks like: virtio:dNvN */
+static void do_virtio_entry(struct module *mod, void *symval)
+{
+	char alias[256] = {};
+
+	DEF_FIELD(symval, virtio_device_id, device);
+	DEF_FIELD(symval, virtio_device_id, vendor);
+
+	ADD(alias, "d", device != VIRTIO_DEV_ANY_ID, device);
+	ADD(alias, "v", vendor != VIRTIO_DEV_ANY_ID, vendor);
+
+	module_alias_printf(mod, true, "virtio:%s", alias);
+}
+
+/*
+ * Looks like: vmbus:guid
+ * Each byte of the guid will be represented by two hex characters
+ * in the name.
+ */
+static void do_vmbus_entry(struct module *mod, void *symval)
+{
+	DEF_FIELD_ADDR(symval, hv_vmbus_device_id, guid);
+	char guid_name[sizeof(*guid) * 2 + 1];
+
+	for (int i = 0; i < sizeof(*guid); i++)
+		sprintf(&guid_name[i * 2], "%02x", guid->b[i]);
+
+	module_alias_printf(mod, false, "vmbus:%s", guid_name);
+}
+
+/* Looks like: rpmsg:S */
+static void do_rpmsg_entry(struct module *mod, void *symval)
+{
+	DEF_FIELD_ADDR(symval, rpmsg_device_id, name);
+
+	module_alias_printf(mod, false, RPMSG_DEVICE_MODALIAS_FMT, *name);
+}
+
+/* Looks like: i2c:S */
+static void do_i2c_entry(struct module *mod, void *symval)
+{
+	DEF_FIELD_ADDR(symval, i2c_device_id, name);
+
+	module_alias_printf(mod, false, I2C_MODULE_PREFIX "%s", *name);
+}
+
+static void do_i3c_entry(struct module *mod, void *symval)
+{
+	char alias[256] = {};
+
+	DEF_FIELD(symval, i3c_device_id, match_flags);
+	DEF_FIELD(symval, i3c_device_id, dcr);
+	DEF_FIELD(symval, i3c_device_id, manuf_id);
+	DEF_FIELD(symval, i3c_device_id, part_id);
+	DEF_FIELD(symval, i3c_device_id, extra_info);
+
+	ADD(alias, "dcr", match_flags & I3C_MATCH_DCR, dcr);
+	ADD(alias, "manuf", match_flags & I3C_MATCH_MANUF, manuf_id);
+	ADD(alias, "part", match_flags & I3C_MATCH_PART, part_id);
+	ADD(alias, "ext", match_flags & I3C_MATCH_EXTRA_INFO, extra_info);
+
+	module_alias_printf(mod, false, "i3c:%s", alias);
+}
+
+static void do_slim_entry(struct module *mod, void *symval)
+{
+	DEF_FIELD(symval, slim_device_id, manf_id);
+	DEF_FIELD(symval, slim_device_id, prod_code);
+
+	module_alias_printf(mod, false, "slim:%x:%x:*", manf_id, prod_code);
+}
+
+/* Looks like: spi:S */
+static void do_spi_entry(struct module *mod, void *symval)
+{
+	DEF_FIELD_ADDR(symval, spi_device_id, name);
+
+	module_alias_printf(mod, false, SPI_MODULE_PREFIX "%s", *name);
+}
+
+static const struct dmifield {
+	const char *prefix;
+	int field;
+} dmi_fields[] = {
+	{ "bvn", DMI_BIOS_VENDOR },
+	{ "bvr", DMI_BIOS_VERSION },
+	{ "bd",  DMI_BIOS_DATE },
+	{ "br",  DMI_BIOS_RELEASE },
+	{ "efr", DMI_EC_FIRMWARE_RELEASE },
+	{ "svn", DMI_SYS_VENDOR },
+	{ "pn",  DMI_PRODUCT_NAME },
+	{ "pvr", DMI_PRODUCT_VERSION },
+	{ "rvn", DMI_BOARD_VENDOR },
+	{ "rn",  DMI_BOARD_NAME },
+	{ "rvr", DMI_BOARD_VERSION },
+	{ "cvn", DMI_CHASSIS_VENDOR },
+	{ "ct",  DMI_CHASSIS_TYPE },
+	{ "cvr", DMI_CHASSIS_VERSION },
+	{ NULL,  DMI_NONE }
+};
+
+static void dmi_ascii_filter(char *d, size_t avail, const char *s)
+{
+	/* Filter out characters we don't want to see in the modalias string */
+	for (; *s; s++)
+		if (*s > ' ' && *s < 127 && *s != ':') {
+			if (avail <= 1)
+				fatal("%s: alias buffer overflow\n", __func__);
+			*(d++) = *s;
+			avail--;
+		}
+
+	*d = 0;
+}
+
+
+static void do_dmi_entry(struct module *mod, void *symval)
+{
+	char alias[256] = {};
+	const size_t sizeof_alias = sizeof(alias);
+	size_t len;
+	int i, j;
+	DEF_FIELD_ADDR(symval, dmi_system_id, matches);
+
+	for (i = 0; i < ARRAY_SIZE(dmi_fields); i++) {
+		for (j = 0; j < 4; j++) {
+			if ((*matches)[j].slot &&
+			    (*matches)[j].slot == dmi_fields[i].field) {
+				alias_append(alias, sizeof_alias, ":%s*",
+					     dmi_fields[i].prefix);
+				len = strlen(alias);
+				dmi_ascii_filter(alias + len, sizeof_alias - len,
+						 (*matches)[j].substr);
+				alias_append(alias, sizeof_alias, "*");
+			}
+		}
+	}
+
+	module_alias_printf(mod, false, "dmi*%s:", alias);
+}
+
+static void do_platform_entry(struct module *mod, void *symval)
+{
+	DEF_FIELD_ADDR(symval, platform_device_id, name);
+
+	module_alias_printf(mod, false, PLATFORM_MODULE_PREFIX "%s", *name);
+}
+
+static void do_mdio_entry(struct module *mod, void *symval)
+{
+	char id[33];
+	int i;
+	DEF_FIELD(symval, mdio_device_id, phy_id);
+	DEF_FIELD(symval, mdio_device_id, phy_id_mask);
+
+	for (i = 0; i < 32; i++) {
+		if (!((phy_id_mask >> (31-i)) & 1))
+			id[i] = '?';
+		else if ((phy_id >> (31-i)) & 1)
+			id[i] = '1';
+		else
+			id[i] = '0';
+	}
+
+	/* Terminate the string */
+	id[32] = '\0';
+
+	module_alias_printf(mod, false, MDIO_MODULE_PREFIX "%s", id);
+}
+
+/* Looks like: zorro:iN. */
+static void do_zorro_entry(struct module *mod, void *symval)
+{
+	char alias[256] = {};
+	DEF_FIELD(symval, zorro_device_id, id);
+
+	ADD(alias, "i", id != ZORRO_WILDCARD, id);
+
+	module_alias_printf(mod, false, "zorro:%s", alias);
+}
+
+/* looks like: "pnp:dD" */
+static void do_isapnp_entry(struct module *mod, void *symval)
+{
+	DEF_FIELD(symval, isapnp_device_id, vendor);
+	DEF_FIELD(symval, isapnp_device_id, function);
+	module_alias_printf(mod, false, "pnp:d%c%c%c%x%x%x%x*",
+		'A' + ((vendor >> 2) & 0x3f) - 1,
+		'A' + (((vendor & 3) << 3) | ((vendor >> 13) & 7)) - 1,
+		'A' + ((vendor >> 8) & 0x1f) - 1,
+		(function >> 4) & 0x0f, function & 0x0f,
+		(function >> 12) & 0x0f, (function >> 8) & 0x0f);
+}
+
+/* Looks like: "ipack:fNvNdN". */
+static void do_ipack_entry(struct module *mod, void *symval)
+{
+	char alias[256] = {};
+	DEF_FIELD(symval, ipack_device_id, format);
+	DEF_FIELD(symval, ipack_device_id, vendor);
+	DEF_FIELD(symval, ipack_device_id, device);
+
+	ADD(alias, "f", format != IPACK_ANY_FORMAT, format);
+	ADD(alias, "v", vendor != IPACK_ANY_ID, vendor);
+	ADD(alias, "d", device != IPACK_ANY_ID, device);
+
+	module_alias_printf(mod, true, "ipack:%s", alias);
+}
+
+/*
+ * Append a match expression for a single masked hex digit.
+ * outp points to a pointer to the character at which to append.
+ *	*outp is updated on return to point just after the appended text,
+ *	to facilitate further appending.
+ */
+static void append_nibble_mask(char **outp,
+			       unsigned int nibble, unsigned int mask)
+{
+	char *p = *outp;
+	unsigned int i;
+
+	switch (mask) {
+	case 0:
+		*p++ = '?';
+		break;
+
+	case 0xf:
+		p += sprintf(p, "%X",  nibble);
+		break;
+
+	default:
+		/*
+		 * Dumbly emit a match pattern for all possible matching
+		 * digits.  This could be improved in some cases using ranges,
+		 * but it has the advantage of being trivially correct, and is
+		 * often optimal.
+		 */
+		*p++ = '[';
+		for (i = 0; i < 0x10; i++)
+			if ((i & mask) == nibble)
+				p += sprintf(p, "%X", i);
+		*p++ = ']';
+	}
+
+	/* Ensure that the string remains NUL-terminated: */
+	*p = '\0';
+
+	/* Advance the caller's end-of-string pointer: */
+	*outp = p;
+}
+
+/*
+ * looks like: "amba:dN"
+ *
+ * N is exactly 8 digits, where each is an upper-case hex digit, or
+ *	a ? or [] pattern matching exactly one digit.
+ */
+static void do_amba_entry(struct module *mod, void *symval)
+{
+	char alias[256];
+	unsigned int digit;
+	char *p = alias;
+	DEF_FIELD(symval, amba_id, id);
+	DEF_FIELD(symval, amba_id, mask);
+
+	if ((id & mask) != id)
+		fatal("%s: Masked-off bit(s) of AMBA device ID are non-zero: id=0x%08X, mask=0x%08X.  Please fix this driver.\n",
+		      mod->name, id, mask);
+
+	for (digit = 0; digit < 8; digit++)
+		append_nibble_mask(&p,
+				   (id >> (4 * (7 - digit))) & 0xf,
+				   (mask >> (4 * (7 - digit))) & 0xf);
+
+	module_alias_printf(mod, false, "amba:d%s", alias);
+}
+
+/*
+ * looks like: "mipscdmm:tN"
+ *
+ * N is exactly 2 digits, where each is an upper-case hex digit, or
+ *	a ? or [] pattern matching exactly one digit.
+ */
+static void do_mips_cdmm_entry(struct module *mod, void *symval)
+{
+	DEF_FIELD(symval, mips_cdmm_device_id, type);
+
+	module_alias_printf(mod, false, "mipscdmm:t%02X*", type);
+}
+
+/* LOOKS like cpu:type:x86,venVVVVfamFFFFmodMMMM:feature:*,FEAT,*
+ * All fields are numbers. It would be nicer to use strings for vendor
+ * and feature, but getting those out of the build system here is too
+ * complicated.
+ */
+
+static void do_x86cpu_entry(struct module *mod, void *symval)
+{
+	char alias[256] = {};
+
+	DEF_FIELD(symval, x86_cpu_id, feature);
+	DEF_FIELD(symval, x86_cpu_id, family);
+	DEF_FIELD(symval, x86_cpu_id, model);
+	DEF_FIELD(symval, x86_cpu_id, vendor);
+
+	ADD(alias, "ven", vendor != X86_VENDOR_ANY, vendor);
+	ADD(alias, "fam", family != X86_FAMILY_ANY, family);
+	ADD(alias, "mod", model  != X86_MODEL_ANY,  model);
+	strcat(alias, ":feature:*");
+	if (feature != X86_FEATURE_ANY)
+		sprintf(alias + strlen(alias), "%04X*", feature);
+
+	module_alias_printf(mod, false, "cpu:type:x86,%s", alias);
+}
+
+/* LOOKS like cpu:type:*:feature:*FEAT* */
+static void do_cpu_entry(struct module *mod, void *symval)
+{
+	DEF_FIELD(symval, cpu_feature, feature);
+
+	module_alias_printf(mod, false, "cpu:type:*:feature:*%04X*", feature);
+}
+
+/* Looks like: mcb:16zN */
+static void do_mcb_entry(struct module *mod, void *symval)
+{
+	DEF_FIELD(symval, mcb_device_id, device);
+
+	module_alias_printf(mod, false, "mcb:16z%03d", device);
+}
+
+/* Looks like: mei:S:uuid:N:* */
+static void do_mei_entry(struct module *mod, void *symval)
+{
+	char alias[256] = {};
+
+	DEF_FIELD_ADDR(symval, mei_cl_device_id, name);
+	DEF_FIELD_ADDR(symval, mei_cl_device_id, uuid);
+	DEF_FIELD(symval, mei_cl_device_id, version);
+
+	add_uuid(alias, *uuid);
+	ADD(alias, ":", version != MEI_CL_VERSION_ANY, version);
+
+	module_alias_printf(mod, false, MEI_CL_MODULE_PREFIX "%s:%s:*",
+			    (*name)[0] ? *name : "*", alias);
+}
+
+/* Looks like: rapidio:vNdNavNadN */
+static void do_rio_entry(struct module *mod, void *symval)
+{
+	char alias[256] = {};
+
+	DEF_FIELD(symval, rio_device_id, did);
+	DEF_FIELD(symval, rio_device_id, vid);
+	DEF_FIELD(symval, rio_device_id, asm_did);
+	DEF_FIELD(symval, rio_device_id, asm_vid);
+
+	ADD(alias, "v", vid != RIO_ANY_ID, vid);
+	ADD(alias, "d", did != RIO_ANY_ID, did);
+	ADD(alias, "av", asm_vid != RIO_ANY_ID, asm_vid);
+	ADD(alias, "ad", asm_did != RIO_ANY_ID, asm_did);
+
+	module_alias_printf(mod, true, "rapidio:%s", alias);
+}
+
+/* Looks like: ulpi:vNpN */
+static void do_ulpi_entry(struct module *mod, void *symval)
+{
+	DEF_FIELD(symval, ulpi_device_id, vendor);
+	DEF_FIELD(symval, ulpi_device_id, product);
+
+	module_alias_printf(mod, false, "ulpi:v%04xp%04x", vendor, product);
+}
+
+/* Looks like: hdaudio:vNrNaN */
+static void do_hda_entry(struct module *mod, void *symval)
+{
+	char alias[256] = {};
+
+	DEF_FIELD(symval, hda_device_id, vendor_id);
+	DEF_FIELD(symval, hda_device_id, rev_id);
+	DEF_FIELD(symval, hda_device_id, api_version);
+
+	ADD(alias, "v", vendor_id != 0, vendor_id);
+	ADD(alias, "r", rev_id != 0, rev_id);
+	ADD(alias, "a", api_version != 0, api_version);
+
+	module_alias_printf(mod, true, "hdaudio:%s", alias);
+}
+
+/* Looks like: sdw:mNpNvNcN */
+static void do_sdw_entry(struct module *mod, void *symval)
+{
+	char alias[256] = {};
+
+	DEF_FIELD(symval, sdw_device_id, mfg_id);
+	DEF_FIELD(symval, sdw_device_id, part_id);
+	DEF_FIELD(symval, sdw_device_id, sdw_version);
+	DEF_FIELD(symval, sdw_device_id, class_id);
+
+	ADD(alias, "m", mfg_id != 0, mfg_id);
+	ADD(alias, "p", part_id != 0, part_id);
+	ADD(alias, "v", sdw_version != 0, sdw_version);
+	ADD(alias, "c", class_id != 0, class_id);
+
+	module_alias_printf(mod, true, "sdw:%s", alias);
+}
+
+/* Looks like: fsl-mc:vNdN */
+static void do_fsl_mc_entry(struct module *mod, void *symval)
+{
+	DEF_FIELD(symval, fsl_mc_device_id, vendor);
+	DEF_FIELD_ADDR(symval, fsl_mc_device_id, obj_type);
+
+	module_alias_printf(mod, false, "fsl-mc:v%08Xd%s", vendor, *obj_type);
+}
+
+/* Looks like: tbsvc:kSpNvNrN */
+static void do_tbsvc_entry(struct module *mod, void *symval)
+{
+	char alias[256] = {};
+
+	DEF_FIELD(symval, tb_service_id, match_flags);
+	DEF_FIELD_ADDR(symval, tb_service_id, protocol_key);
+	DEF_FIELD(symval, tb_service_id, protocol_id);
+	DEF_FIELD(symval, tb_service_id, protocol_version);
+	DEF_FIELD(symval, tb_service_id, protocol_revision);
+
+	if (match_flags & TBSVC_MATCH_PROTOCOL_KEY)
+		sprintf(alias + strlen(alias), "k%s", *protocol_key);
+	else
+		strcat(alias + strlen(alias), "k*");
+	ADD(alias, "p", match_flags & TBSVC_MATCH_PROTOCOL_ID, protocol_id);
+	ADD(alias, "v", match_flags & TBSVC_MATCH_PROTOCOL_VERSION,
+	    protocol_version);
+	ADD(alias, "r", match_flags & TBSVC_MATCH_PROTOCOL_REVISION,
+	    protocol_revision);
+
+	module_alias_printf(mod, true, "tbsvc:%s", alias);
+}
+
+/* Looks like: typec:idN */
+static void do_typec_entry(struct module *mod, void *symval)
+{
+	DEF_FIELD(symval, typec_device_id, svid);
+
+	module_alias_printf(mod, false, "typec:id%04X", svid);
+}
+
+/* Looks like: tee:uuid */
+static void do_tee_entry(struct module *mod, void *symval)
+{
+	DEF_FIELD_ADDR(symval, tee_client_device_id, uuid);
+
+	module_alias_printf(mod, true,
+			    "tee:%02x%02x%02x%02x-%02x%02x-%02x%02x-%02x%02x-%02x%02x%02x%02x%02x%02x",
+		uuid->b[0], uuid->b[1], uuid->b[2], uuid->b[3], uuid->b[4],
+		uuid->b[5], uuid->b[6], uuid->b[7], uuid->b[8], uuid->b[9],
+		uuid->b[10], uuid->b[11], uuid->b[12], uuid->b[13], uuid->b[14],
+		uuid->b[15]);
+}
+
+/* Looks like: wmi:guid */
+static void do_wmi_entry(struct module *mod, void *symval)
+{
+	DEF_FIELD_ADDR(symval, wmi_device_id, guid_string);
+	char result[sizeof(*guid_string)];
+	int i;
+
+	if (strlen(*guid_string) != UUID_STRING_LEN) {
+		warn("Invalid WMI device id 'wmi:%s' in '%s'\n",
+				*guid_string, mod->name);
+		return;
+	}
+
+	for (i = 0; i < UUID_STRING_LEN; i++) {
+		char value = (*guid_string)[i];
+		bool valid = false;
+
+		if (i == 8 || i == 13 || i == 18 || i == 23) {
+			if (value == '-')
+				valid = true;
+		} else {
+			if (isxdigit(value))
+				valid = true;
+		}
+
+		if (!valid) {
+			warn("Invalid character %c inside WMI GUID string '%s' in '%s'\n",
+			     value, *guid_string, mod->name);
+			return;
+		}
+
+		/* Some GUIDs from BMOF definitions contain lowercase characters */
+		result[i] = toupper(value);
+	}
+
+	result[i] = '\0';
+
+	module_alias_printf(mod, false, WMI_MODULE_PREFIX "%s", result);
+}
+
+/* Looks like: mhi:S */
+static void do_mhi_entry(struct module *mod, void *symval)
+{
+	DEF_FIELD_ADDR(symval, mhi_device_id, chan);
+	module_alias_printf(mod, false, MHI_DEVICE_MODALIAS_FMT, *chan);
+}
+
+/* Looks like: mhi_ep:S */
+static void do_mhi_ep_entry(struct module *mod, void *symval)
+{
+	DEF_FIELD_ADDR(symval, mhi_device_id, chan);
+
+	module_alias_printf(mod, false, MHI_EP_DEVICE_MODALIAS_FMT, *chan);
+}
+
+/* Looks like: ishtp:{guid} */
+static void do_ishtp_entry(struct module *mod, void *symval)
+{
+	char alias[256] = {};
+	DEF_FIELD_ADDR(symval, ishtp_device_id, guid);
+
+	add_guid(alias, *guid);
+
+	module_alias_printf(mod, false, ISHTP_MODULE_PREFIX "{%s}", alias);
+}
+
+static void do_auxiliary_entry(struct module *mod, void *symval)
+{
+	DEF_FIELD_ADDR(symval, auxiliary_device_id, name);
+
+	module_alias_printf(mod, false, AUXILIARY_MODULE_PREFIX "%s", *name);
+}
+
+/*
+ * Looks like: ssam:dNcNtNiNfN
+ *
+ * N is exactly 2 digits, where each is an upper-case hex digit.
+ */
+static void do_ssam_entry(struct module *mod, void *symval)
+{
+	char alias[256] = {};
+
+	DEF_FIELD(symval, ssam_device_id, match_flags);
+	DEF_FIELD(symval, ssam_device_id, domain);
+	DEF_FIELD(symval, ssam_device_id, category);
+	DEF_FIELD(symval, ssam_device_id, target);
+	DEF_FIELD(symval, ssam_device_id, instance);
+	DEF_FIELD(symval, ssam_device_id, function);
+
+	ADD(alias, "t", match_flags & SSAM_MATCH_TARGET, target);
+	ADD(alias, "i", match_flags & SSAM_MATCH_INSTANCE, instance);
+	ADD(alias, "f", match_flags & SSAM_MATCH_FUNCTION, function);
+
+	module_alias_printf(mod, false, "ssam:d%02Xc%02X%s",
+			    domain, category, alias);
+}
+
+/* Looks like: dfl:tNfN */
+static void do_dfl_entry(struct module *mod, void *symval)
+{
+	DEF_FIELD(symval, dfl_device_id, type);
+	DEF_FIELD(symval, dfl_device_id, feature_id);
+
+	module_alias_printf(mod, true, "dfl:t%04Xf%04X", type, feature_id);
+}
+
+/* Looks like: cdx:vNdN */
+static void do_cdx_entry(struct module *mod, void *symval)
+{
+	char alias[256];
+
+	DEF_FIELD(symval, cdx_device_id, vendor);
+	DEF_FIELD(symval, cdx_device_id, device);
+	DEF_FIELD(symval, cdx_device_id, subvendor);
+	DEF_FIELD(symval, cdx_device_id, subdevice);
+	DEF_FIELD(symval, cdx_device_id, class);
+	DEF_FIELD(symval, cdx_device_id, class_mask);
+	DEF_FIELD(symval, cdx_device_id, override_only);
+
+	switch (override_only) {
+	case 0:
+		strcpy(alias, "cdx:");
+		break;
+	case CDX_ID_F_VFIO_DRIVER_OVERRIDE:
+		strcpy(alias, "vfio_cdx:");
+		break;
+	default:
+		warn("Unknown CDX driver_override alias %08X\n",
+		     override_only);
+		return;
+	}
+
+	ADD(alias, "v", vendor != CDX_ANY_ID, vendor);
+	ADD(alias, "d", device != CDX_ANY_ID, device);
+	ADD(alias, "sv", subvendor != CDX_ANY_ID, subvendor);
+	ADD(alias, "sd", subdevice != CDX_ANY_ID, subdevice);
+	ADD(alias, "c", class_mask == 0xFFFFFF, class);
+
+	module_alias_printf(mod, false, "%s", alias);
+}
+
+static void do_vchiq_entry(struct module *mod, void *symval)
+{
+	DEF_FIELD_ADDR(symval, vchiq_device_id, name);
+
+	module_alias_printf(mod, false, "vchiq:%s", *name);
+}
+
+/* Looks like: coreboot:tN */
+static void do_coreboot_entry(struct module *mod, void *symval)
+{
+	DEF_FIELD(symval, coreboot_device_id, tag);
+
+	module_alias_printf(mod, false, "coreboot:t%08X", tag);
+}
+
+/* Does namelen bytes of name exactly match the symbol? */
+static bool sym_is(const char *name, unsigned namelen, const char *symbol)
+{
+	if (namelen != strlen(symbol))
+		return false;
+
+	return memcmp(name, symbol, namelen) == 0;
+}
+
+static void do_table(const char *name, void *symval, unsigned long size,
+		     unsigned long id_size,
+		     const char *device_id,
+		     void (*do_entry)(struct module *mod, void *symval),
+		     struct module *mod)
+{
+	unsigned int i;
+
+	if (size % id_size || size < id_size) {
+		error("%s: type mismatch between %s[] and MODULE_DEVICE_TABLE(%s, ...)\n",
+		      mod->name, name, device_id);
+		return;
+	}
+
+	/* Verify the last entry is a terminator */
+	for (i = size - id_size; i < size; i++) {
+		if (*(uint8_t *)(symval + i)) {
+			error("%s: %s[] is not terminated with a NULL entry\n",
+			      mod->name, name);
+			return;
+		}
+	}
+
+	/* Leave last one: it's the terminator. */
+	size -= id_size;
+
+	for (i = 0; i < size; i += id_size)
+		do_entry(mod, symval + i);
+}
+
+static const struct devtable devtable[] = {
+	{"hid", SIZE_hid_device_id, do_hid_entry},
+	{"ieee1394", SIZE_ieee1394_device_id, do_ieee1394_entry},
+	{"pci", SIZE_pci_device_id, do_pci_entry},
+	{"ccw", SIZE_ccw_device_id, do_ccw_entry},
+	{"ap", SIZE_ap_device_id, do_ap_entry},
+	{"css", SIZE_css_device_id, do_css_entry},
+	{"serio", SIZE_serio_device_id, do_serio_entry},
+	{"acpi", SIZE_acpi_device_id, do_acpi_entry},
+	{"pcmcia", SIZE_pcmcia_device_id, do_pcmcia_entry},
+	{"vio", SIZE_vio_device_id, do_vio_entry},
+	{"input", SIZE_input_device_id, do_input_entry},
+	{"eisa", SIZE_eisa_device_id, do_eisa_entry},
+	{"parisc", SIZE_parisc_device_id, do_parisc_entry},
+	{"sdio", SIZE_sdio_device_id, do_sdio_entry},
+	{"ssb", SIZE_ssb_device_id, do_ssb_entry},
+	{"bcma", SIZE_bcma_device_id, do_bcma_entry},
+	{"virtio", SIZE_virtio_device_id, do_virtio_entry},
+	{"vmbus", SIZE_hv_vmbus_device_id, do_vmbus_entry},
+	{"rpmsg", SIZE_rpmsg_device_id, do_rpmsg_entry},
+	{"i2c", SIZE_i2c_device_id, do_i2c_entry},
+	{"i3c", SIZE_i3c_device_id, do_i3c_entry},
+	{"slim", SIZE_slim_device_id, do_slim_entry},
+	{"spi", SIZE_spi_device_id, do_spi_entry},
+	{"dmi", SIZE_dmi_system_id, do_dmi_entry},
+	{"platform", SIZE_platform_device_id, do_platform_entry},
+	{"mdio", SIZE_mdio_device_id, do_mdio_entry},
+	{"zorro", SIZE_zorro_device_id, do_zorro_entry},
+	{"isapnp", SIZE_isapnp_device_id, do_isapnp_entry},
+	{"ipack", SIZE_ipack_device_id, do_ipack_entry},
+	{"amba", SIZE_amba_id, do_amba_entry},
+	{"mipscdmm", SIZE_mips_cdmm_device_id, do_mips_cdmm_entry},
+	{"x86cpu", SIZE_x86_cpu_id, do_x86cpu_entry},
+	{"cpu", SIZE_cpu_feature, do_cpu_entry},
+	{"mcb", SIZE_mcb_device_id, do_mcb_entry},
+	{"mei", SIZE_mei_cl_device_id, do_mei_entry},
+	{"rapidio", SIZE_rio_device_id, do_rio_entry},
+	{"ulpi", SIZE_ulpi_device_id, do_ulpi_entry},
+	{"hdaudio", SIZE_hda_device_id, do_hda_entry},
+	{"sdw", SIZE_sdw_device_id, do_sdw_entry},
+	{"fslmc", SIZE_fsl_mc_device_id, do_fsl_mc_entry},
+	{"tbsvc", SIZE_tb_service_id, do_tbsvc_entry},
+	{"typec", SIZE_typec_device_id, do_typec_entry},
+	{"tee", SIZE_tee_client_device_id, do_tee_entry},
+	{"wmi", SIZE_wmi_device_id, do_wmi_entry},
+	{"mhi", SIZE_mhi_device_id, do_mhi_entry},
+	{"mhi_ep", SIZE_mhi_device_id, do_mhi_ep_entry},
+	{"auxiliary", SIZE_auxiliary_device_id, do_auxiliary_entry},
+	{"ssam", SIZE_ssam_device_id, do_ssam_entry},
+	{"dfl", SIZE_dfl_device_id, do_dfl_entry},
+	{"ishtp", SIZE_ishtp_device_id, do_ishtp_entry},
+	{"cdx", SIZE_cdx_device_id, do_cdx_entry},
+	{"vchiq", SIZE_vchiq_device_id, do_vchiq_entry},
+	{"coreboot", SIZE_coreboot_device_id, do_coreboot_entry},
+	{"of", SIZE_of_device_id, do_of_entry},
+	{"usb", SIZE_usb_device_id, do_usb_entry_multi},
+	{"pnp", SIZE_pnp_device_id, do_pnp_device_entry},
+	{"pnp_card", SIZE_pnp_card_device_id, do_pnp_card_entry},
+};
+
+/* Create MODULE_ALIAS() statements.
+ * At this time, we cannot write the actual output C source yet,
+ * so we write into the mod->dev_table_buf buffer. */
+void handle_moddevtable(struct module *mod, struct elf_info *info,
+			Elf_Sym *sym, const char *symname)
+{
+	void *symval;
+	char *zeros = NULL;
+	const char *type, *name, *modname;
+	size_t typelen, modnamelen;
+	static const char *prefix = "__mod_device_table__";
+
+	/* We're looking for a section relative symbol */
+	if (!sym->st_shndx || get_secindex(info, sym) >= info->num_sections)
+		return;
+
+	/* We're looking for an object */
+	if (ELF_ST_TYPE(sym->st_info) != STT_OBJECT)
+		return;
+
+	/* All our symbols are of form __mod_device_table__kmod_<modname>__<type>__<name>. */
+	if (!strstarts(symname, prefix))
+		return;
+
+	modname = strstr(symname, "__kmod_");
+	if (!modname)
+		return;
+	modname += strlen("__kmod_");
+
+	type = strstr(modname, "__");
+	if (!type)
+		return;
+	modnamelen = type - modname;
+	type += strlen("__");
+
+	name = strstr(type, "__");
+	if (!name)
+		return;
+	typelen = name - type;
+	name += strlen("__");
+
+	/* Handle all-NULL symbols allocated into .bss */
+	if (info->sechdrs[get_secindex(info, sym)].sh_type & SHT_NOBITS) {
+		zeros = calloc(1, sym->st_size);
+		symval = zeros;
+	} else {
+		symval = sym_get_data(info, sym);
+	}
+
+	for (int i = 0; i < ARRAY_SIZE(devtable); i++) {
+		const struct devtable *p = &devtable[i];
+
+		if (sym_is(type, typelen, p->device_id)) {
+			do_table(name, symval, sym->st_size, p->id_size,
+				 p->device_id, p->do_entry, mod);
+			break;
+		}
+	}
+
+	if (mod->is_vmlinux) {
+		struct module_alias *alias;
+
+		/*
+		 * If this is vmlinux, record the name of the builtin module.
+		 * Traverse the linked list in the reverse order, and set the
+		 * builtin_modname unless it has already been set in the
+		 * previous call.
+		 */
+		list_for_each_entry_reverse(alias, &mod->aliases, node) {
+			if (alias->builtin_modname)
+				break;
+			alias->builtin_modname = xstrndup(modname, modnamelen);
+		}
+	}
+
+	free(zeros);
+}
diff --git a/scripts/mod/mk_elfconfig.c b/scripts/mod/mk_elfconfig.c
new file mode 100644
index 000000000..e8cee4e4b
--- /dev/null
+++ b/scripts/mod/mk_elfconfig.c
@@ -0,0 +1,32 @@
+// SPDX-License-Identifier: GPL-2.0
+#include <stdio.h>
+#include <stdlib.h>
+#include <string.h>
+#include <elf.h>
+
+int
+main(int argc, char **argv)
+{
+	unsigned char ei[EI_NIDENT];
+
+	if (fread(ei, 1, EI_NIDENT, stdin) != EI_NIDENT) {
+		fprintf(stderr, "Error: input truncated\n");
+		return 1;
+	}
+	if (memcmp(ei, ELFMAG, SELFMAG) != 0) {
+		fprintf(stderr, "Error: not ELF\n");
+		return 1;
+	}
+	switch (ei[EI_CLASS]) {
+	case ELFCLASS32:
+		printf("#define KERNEL_ELFCLASS ELFCLASS32\n");
+		break;
+	case ELFCLASS64:
+		printf("#define KERNEL_ELFCLASS ELFCLASS64\n");
+		break;
+	default:
+		exit(1);
+	}
+
+	return 0;
+}
diff --git a/scripts/mod/modpost.c b/scripts/mod/modpost.c
new file mode 100644
index 000000000..75374c64b
--- /dev/null
+++ b/scripts/mod/modpost.c
@@ -0,0 +1,2420 @@
+/* Postprocess module symbol versions
+ *
+ * Copyright 2003       Kai Germaschewski
+ * Copyright 2002-2004  Rusty Russell, IBM Corporation
+ * Copyright 2006-2008  Sam Ravnborg
+ * Based in part on module-init-tools/depmod.c,file2alias
+ *
+ * This software may be used and distributed according to the terms
+ * of the GNU General Public License, incorporated herein by reference.
+ *
+ * Usage: modpost vmlinux module1.o module2.o ...
+ */
+
+#define _GNU_SOURCE
+#include <elf.h>
+#include <fnmatch.h>
+#include <stdio.h>
+#include <ctype.h>
+#include <string.h>
+#include <limits.h>
+#include <stdbool.h>
+#include <errno.h>
+
+#include <hash.h>
+#include <hashtable.h>
+#include <list.h>
+#include <xalloc.h>
+#include "modpost.h"
+#include "../../include/linux/license.h"
+
+#define MODULE_NS_PREFIX "module:"
+
+static bool module_enabled;
+/* Are we using CONFIG_MODVERSIONS? */
+static bool modversions;
+/* Is CONFIG_MODULE_SRCVERSION_ALL set? */
+static bool all_versions;
+/* Is CONFIG_BASIC_MODVERSIONS set? */
+static bool basic_modversions;
+/* Is CONFIG_EXTENDED_MODVERSIONS set? */
+static bool extended_modversions;
+/* If we are modposting external module set to 1 */
+static bool external_module;
+/* Only warn about unresolved symbols */
+static bool warn_unresolved;
+
+static int sec_mismatch_count;
+static bool sec_mismatch_warn_only = true;
+/* Trim EXPORT_SYMBOLs that are unused by in-tree modules */
+static bool trim_unused_exports;
+
+/* ignore missing files */
+static bool ignore_missing_files;
+/* If set to 1, only warn (instead of error) about missing ns imports */
+static bool allow_missing_ns_imports;
+
+static bool error_occurred;
+
+static bool extra_warn __attribute__((unused));
+
+bool target_is_big_endian;
+bool host_is_big_endian;
+
+/*
+ * Cut off the warnings when there are too many. This typically occurs when
+ * vmlinux is missing. ('make modules' without building vmlinux.)
+ */
+#define MAX_UNRESOLVED_REPORTS	10
+static unsigned int nr_unresolved;
+
+/* In kernel, this size is defined in linux/module.h;
+ * here we use Elf_Addr instead of long for covering cross-compile
+ */
+
+#define MODULE_NAME_LEN (64 - sizeof(Elf_Addr))
+
+void modpost_log(bool is_error, struct module *mod, const char *fmt, ...)
+{
+	va_list arglist;
+
+	if (is_error) {
+		fprintf(stderr, "ERROR: ");
+		error_occurred = true;
+	} else {
+		fprintf(stderr, "WARNING: ");
+	}
+
+	fprintf(stderr, "modpost: ");
+
+	if (mod)
+		fprintf(stderr, "%s%s: ", mod->name, mod->is_vmlinux ? "" : ".ko");
+
+	va_start(arglist, fmt);
+	vfprintf(stderr, fmt, arglist);
+	va_end(arglist);
+}
+
+#define mod_warn(mod, fmt, args...)	modpost_log(false, mod, fmt, ##args)
+#define mod_error(mod, fmt, args...)	modpost_log(true, mod, fmt, ##args)
+
+static inline bool strends(const char *str, const char *postfix)
+{
+	if (strlen(str) < strlen(postfix))
+		return false;
+
+	return strcmp(str + strlen(str) - strlen(postfix), postfix) == 0;
+}
+
+/**
+ * get_basename - return the last part of a pathname.
+ *
+ * @path: path to extract the filename from.
+ */
+const char *get_basename(const char *path)
+{
+	const char *tail = strrchr(path, '/');
+
+	return tail ? tail + 1 : path;
+}
+
+char *read_text_file(const char *filename)
+{
+	struct stat st;
+	size_t nbytes;
+	int fd;
+	char *buf;
+
+	fd = open(filename, O_RDONLY);
+	if (fd < 0) {
+		perror(filename);
+		exit(1);
+	}
+
+	if (fstat(fd, &st) < 0) {
+		perror(filename);
+		exit(1);
+	}
+
+	buf = xmalloc(st.st_size + 1);
+
+	nbytes = st.st_size;
+
+	while (nbytes) {
+		ssize_t bytes_read;
+
+		bytes_read = read(fd, buf, nbytes);
+		if (bytes_read < 0) {
+			perror(filename);
+			exit(1);
+		}
+
+		nbytes -= bytes_read;
+	}
+	buf[st.st_size] = '\0';
+
+	close(fd);
+
+	return buf;
+}
+
+char *get_line(char **stringp)
+{
+	char *orig = *stringp, *next;
+
+	/* do not return the unwanted extra line at EOF */
+	if (!orig || *orig == '\0')
+		return NULL;
+
+	/* don't use strsep here, it is not available everywhere */
+	next = strchr(orig, '\n');
+	if (next)
+		*next++ = '\0';
+
+	*stringp = next;
+
+	return orig;
+}
+
+/* A list of all modules we processed */
+LIST_HEAD(modules);
+
+static struct module *find_module(const char *filename, const char *modname)
+{
+	struct module *mod;
+
+	list_for_each_entry(mod, &modules, list) {
+		if (!strcmp(mod->dump_file, filename) &&
+		    !strcmp(mod->name, modname))
+			return mod;
+	}
+	return NULL;
+}
+
+static struct module *new_module(const char *name, size_t namelen)
+{
+	struct module *mod;
+
+	mod = xmalloc(sizeof(*mod) + namelen + 1);
+	memset(mod, 0, sizeof(*mod));
+
+	INIT_LIST_HEAD(&mod->exported_symbols);
+	INIT_LIST_HEAD(&mod->unresolved_symbols);
+	INIT_LIST_HEAD(&mod->missing_namespaces);
+	INIT_LIST_HEAD(&mod->imported_namespaces);
+	INIT_LIST_HEAD(&mod->aliases);
+
+	memcpy(mod->name, name, namelen);
+	mod->name[namelen] = '\0';
+	mod->is_vmlinux = (strcmp(mod->name, "vmlinux") == 0);
+
+	/*
+	 * Set mod->is_gpl_compatible to true by default. If MODULE_LICENSE()
+	 * is missing, do not check the use for EXPORT_SYMBOL_GPL() because
+	 * modpost will exit with an error anyway.
+	 */
+	mod->is_gpl_compatible = true;
+
+	list_add_tail(&mod->list, &modules);
+
+	return mod;
+}
+
+struct symbol {
+	struct hlist_node hnode;/* link to hash table */
+	struct list_head list;	/* link to module::exported_symbols or module::unresolved_symbols */
+	struct module *module;
+	char *namespace;
+	unsigned int crc;
+	bool crc_valid;
+	bool weak;
+	bool is_func;
+	bool is_gpl_only;	/* exported by EXPORT_SYMBOL_GPL */
+	bool used;		/* there exists a user of this symbol */
+	char name[];
+};
+
+static HASHTABLE_DEFINE(symbol_hashtable, 1U << 10);
+
+/**
+ * Allocate a new symbols for use in the hash of exported symbols or
+ * the list of unresolved symbols per module
+ **/
+static struct symbol *alloc_symbol(const char *name)
+{
+	struct symbol *s = xmalloc(sizeof(*s) + strlen(name) + 1);
+
+	memset(s, 0, sizeof(*s));
+	strcpy(s->name, name);
+
+	return s;
+}
+
+static uint8_t get_symbol_flags(const struct symbol *sym)
+{
+	return sym->is_gpl_only ? KSYM_FLAG_GPL_ONLY : 0;
+}
+
+/* For the hash of exported symbols */
+static void hash_add_symbol(struct symbol *sym)
+{
+	hash_add(symbol_hashtable, &sym->hnode, hash_str(sym->name));
+}
+
+static void sym_add_unresolved(const char *name, struct module *mod, bool weak)
+{
+	struct symbol *sym;
+
+	sym = alloc_symbol(name);
+	sym->weak = weak;
+
+	list_add_tail(&sym->list, &mod->unresolved_symbols);
+}
+
+static struct symbol *sym_find_with_module(const char *name, struct module *mod)
+{
+	struct symbol *s;
+
+	/* For our purposes, .foo matches foo.  PPC64 needs this. */
+	if (name[0] == '.')
+		name++;
+
+	hash_for_each_possible(symbol_hashtable, s, hnode, hash_str(name)) {
+		if (strcmp(s->name, name) == 0 && (!mod || s->module == mod))
+			return s;
+	}
+	return NULL;
+}
+
+static struct symbol *find_symbol(const char *name)
+{
+	return sym_find_with_module(name, NULL);
+}
+
+struct namespace_list {
+	struct list_head list;
+	char namespace[];
+};
+
+static bool contains_namespace(struct list_head *head, const char *namespace)
+{
+	struct namespace_list *list;
+
+	/*
+	 * The default namespace is null string "", which is always implicitly
+	 * contained.
+	 */
+	if (!namespace[0])
+		return true;
+
+	list_for_each_entry(list, head, list) {
+		if (!strcmp(list->namespace, namespace))
+			return true;
+	}
+
+	return false;
+}
+
+static void add_namespace(struct list_head *head, const char *namespace)
+{
+	struct namespace_list *ns_entry;
+
+	if (!contains_namespace(head, namespace)) {
+		ns_entry = xmalloc(sizeof(*ns_entry) + strlen(namespace) + 1);
+		strcpy(ns_entry->namespace, namespace);
+		list_add_tail(&ns_entry->list, head);
+	}
+}
+
+static void *sym_get_data_by_offset(const struct elf_info *info,
+				    unsigned int secindex, unsigned long offset)
+{
+	Elf_Shdr *sechdr = &info->sechdrs[secindex];
+
+	return (void *)info->hdr + sechdr->sh_offset + offset;
+}
+
+void *sym_get_data(const struct elf_info *info, const Elf_Sym *sym)
+{
+	return sym_get_data_by_offset(info, get_secindex(info, sym),
+				      sym->st_value);
+}
+
+static const char *sech_name(const struct elf_info *info, Elf_Shdr *sechdr)
+{
+	return sym_get_data_by_offset(info, info->secindex_strings,
+				      sechdr->sh_name);
+}
+
+static const char *sec_name(const struct elf_info *info, unsigned int secindex)
+{
+	/*
+	 * If sym->st_shndx is a special section index, there is no
+	 * corresponding section header.
+	 * Return "" if the index is out of range of info->sechdrs[] array.
+	 */
+	if (secindex >= info->num_sections)
+		return "";
+
+	return sech_name(info, &info->sechdrs[secindex]);
+}
+
+static struct symbol *sym_add_exported(const char *name, struct module *mod,
+				       bool gpl_only, const char *namespace)
+{
+	struct symbol *s = find_symbol(name);
+
+	if (s && (!external_module || s->module->is_vmlinux || s->module == mod)) {
+		mod_error(mod, "symbol '%s' exported twice. Previous export was in %s%s\n",
+			  name, s->module->name, s->module->is_vmlinux ? "" : ".ko");
+	}
+
+	s = alloc_symbol(name);
+	s->module = mod;
+	s->is_gpl_only = gpl_only;
+	s->namespace = xstrdup(namespace);
+	list_add_tail(&s->list, &mod->exported_symbols);
+	hash_add_symbol(s);
+
+	return s;
+}
+
+static void sym_set_crc(struct symbol *sym, unsigned int crc)
+{
+	sym->crc = crc;
+	sym->crc_valid = true;
+}
+
+static void *grab_file(const char *filename, size_t *size)
+{
+	struct stat st;
+	void *map = MAP_FAILED;
+	int fd;
+
+	fd = open(filename, O_RDONLY);
+	if (fd < 0)
+		return NULL;
+	if (fstat(fd, &st))
+		goto failed;
+
+	*size = st.st_size;
+	map = mmap(NULL, *size, PROT_READ|PROT_WRITE, MAP_PRIVATE, fd, 0);
+
+failed:
+	close(fd);
+	if (map == MAP_FAILED)
+		return NULL;
+	return map;
+}
+
+static void release_file(void *file, size_t size)
+{
+	munmap(file, size);
+}
+
+static int parse_elf(struct elf_info *info, const char *filename)
+{
+	unsigned int i;
+	Elf_Ehdr *hdr;
+	Elf_Shdr *sechdrs;
+	Elf_Sym  *sym;
+	const char *secstrings;
+	unsigned int symtab_idx = ~0U, symtab_shndx_idx = ~0U;
+
+	hdr = grab_file(filename, &info->size);
+	if (!hdr) {
+		if (ignore_missing_files) {
+			fprintf(stderr, "%s: %s (ignored)\n", filename,
+				strerror(errno));
+			return 0;
+		}
+		perror(filename);
+		exit(1);
+	}
+	info->hdr = hdr;
+	if (info->size < sizeof(*hdr)) {
+		/* file too small, assume this is an empty .o file */
+		return 0;
+	}
+	/* Is this a valid ELF file? */
+	if ((hdr->e_ident[EI_MAG0] != ELFMAG0) ||
+	    (hdr->e_ident[EI_MAG1] != ELFMAG1) ||
+	    (hdr->e_ident[EI_MAG2] != ELFMAG2) ||
+	    (hdr->e_ident[EI_MAG3] != ELFMAG3)) {
+		/* Not an ELF file - silently ignore it */
+		return 0;
+	}
+
+	switch (hdr->e_ident[EI_DATA]) {
+	case ELFDATA2LSB:
+		target_is_big_endian = false;
+		break;
+	case ELFDATA2MSB:
+		target_is_big_endian = true;
+		break;
+	default:
+		fatal("target endian is unknown\n");
+	}
+
+	/* Fix endianness in ELF header */
+	hdr->e_type      = TO_NATIVE(hdr->e_type);
+	hdr->e_machine   = TO_NATIVE(hdr->e_machine);
+	hdr->e_version   = TO_NATIVE(hdr->e_version);
+	hdr->e_entry     = TO_NATIVE(hdr->e_entry);
+	hdr->e_phoff     = TO_NATIVE(hdr->e_phoff);
+	hdr->e_shoff     = TO_NATIVE(hdr->e_shoff);
+	hdr->e_flags     = TO_NATIVE(hdr->e_flags);
+	hdr->e_ehsize    = TO_NATIVE(hdr->e_ehsize);
+	hdr->e_phentsize = TO_NATIVE(hdr->e_phentsize);
+	hdr->e_phnum     = TO_NATIVE(hdr->e_phnum);
+	hdr->e_shentsize = TO_NATIVE(hdr->e_shentsize);
+	hdr->e_shnum     = TO_NATIVE(hdr->e_shnum);
+	hdr->e_shstrndx  = TO_NATIVE(hdr->e_shstrndx);
+	sechdrs = (void *)hdr + hdr->e_shoff;
+	info->sechdrs = sechdrs;
+
+	/* modpost only works for relocatable objects */
+	if (hdr->e_type != ET_REL)
+		fatal("%s: not relocatable object.", filename);
+
+	/* Check if file offset is correct */
+	if (hdr->e_shoff > info->size)
+		fatal("section header offset=%lu in file '%s' is bigger than filesize=%zu\n",
+		      (unsigned long)hdr->e_shoff, filename, info->size);
+
+	if (hdr->e_shnum == SHN_UNDEF) {
+		/*
+		 * There are more than 64k sections,
+		 * read count from .sh_size.
+		 */
+		info->num_sections = TO_NATIVE(sechdrs[0].sh_size);
+	}
+	else {
+		info->num_sections = hdr->e_shnum;
+	}
+	if (hdr->e_shstrndx == SHN_XINDEX) {
+		info->secindex_strings = TO_NATIVE(sechdrs[0].sh_link);
+	}
+	else {
+		info->secindex_strings = hdr->e_shstrndx;
+	}
+
+	/* Fix endianness in section headers */
+	for (i = 0; i < info->num_sections; i++) {
+		sechdrs[i].sh_name      = TO_NATIVE(sechdrs[i].sh_name);
+		sechdrs[i].sh_type      = TO_NATIVE(sechdrs[i].sh_type);
+		sechdrs[i].sh_flags     = TO_NATIVE(sechdrs[i].sh_flags);
+		sechdrs[i].sh_addr      = TO_NATIVE(sechdrs[i].sh_addr);
+		sechdrs[i].sh_offset    = TO_NATIVE(sechdrs[i].sh_offset);
+		sechdrs[i].sh_size      = TO_NATIVE(sechdrs[i].sh_size);
+		sechdrs[i].sh_link      = TO_NATIVE(sechdrs[i].sh_link);
+		sechdrs[i].sh_info      = TO_NATIVE(sechdrs[i].sh_info);
+		sechdrs[i].sh_addralign = TO_NATIVE(sechdrs[i].sh_addralign);
+		sechdrs[i].sh_entsize   = TO_NATIVE(sechdrs[i].sh_entsize);
+	}
+	/* Find symbol table. */
+	secstrings = (void *)hdr + sechdrs[info->secindex_strings].sh_offset;
+	for (i = 1; i < info->num_sections; i++) {
+		const char *secname;
+		int nobits = sechdrs[i].sh_type == SHT_NOBITS;
+
+		if (!nobits && sechdrs[i].sh_offset > info->size)
+			fatal("%s is truncated. sechdrs[i].sh_offset=%lu > sizeof(*hrd)=%zu\n",
+			      filename, (unsigned long)sechdrs[i].sh_offset,
+			      sizeof(*hdr));
+
+		secname = secstrings + sechdrs[i].sh_name;
+		if (strcmp(secname, ".modinfo") == 0) {
+			if (nobits)
+				fatal("%s has NOBITS .modinfo\n", filename);
+			info->modinfo = (void *)hdr + sechdrs[i].sh_offset;
+			info->modinfo_len = sechdrs[i].sh_size;
+		} else if (!strcmp(secname, ".export_symbol")) {
+			info->export_symbol_secndx = i;
+		} else if (!strcmp(secname, ".no_trim_symbol")) {
+			info->no_trim_symbol = (void *)hdr + sechdrs[i].sh_offset;
+			info->no_trim_symbol_len = sechdrs[i].sh_size;
+		}
+
+		if (sechdrs[i].sh_type == SHT_SYMTAB) {
+			unsigned int sh_link_idx;
+			symtab_idx = i;
+			info->symtab_start = (void *)hdr +
+			    sechdrs[i].sh_offset;
+			info->symtab_stop  = (void *)hdr +
+			    sechdrs[i].sh_offset + sechdrs[i].sh_size;
+			sh_link_idx = sechdrs[i].sh_link;
+			info->strtab       = (void *)hdr +
+			    sechdrs[sh_link_idx].sh_offset;
+		}
+
+		/* 32bit section no. table? ("more than 64k sections") */
+		if (sechdrs[i].sh_type == SHT_SYMTAB_SHNDX) {
+			symtab_shndx_idx = i;
+			info->symtab_shndx_start = (void *)hdr +
+			    sechdrs[i].sh_offset;
+			info->symtab_shndx_stop  = (void *)hdr +
+			    sechdrs[i].sh_offset + sechdrs[i].sh_size;
+		}
+	}
+	if (!info->symtab_start)
+		fatal("%s has no symtab?\n", filename);
+
+	/* Fix endianness in symbols */
+	for (sym = info->symtab_start; sym < info->symtab_stop; sym++) {
+		sym->st_shndx = TO_NATIVE(sym->st_shndx);
+		sym->st_name  = TO_NATIVE(sym->st_name);
+		sym->st_value = TO_NATIVE(sym->st_value);
+		sym->st_size  = TO_NATIVE(sym->st_size);
+	}
+
+	if (symtab_shndx_idx != ~0U) {
+		Elf32_Word *p;
+		if (symtab_idx != sechdrs[symtab_shndx_idx].sh_link)
+			fatal("%s: SYMTAB_SHNDX has bad sh_link: %u!=%u\n",
+			      filename, sechdrs[symtab_shndx_idx].sh_link,
+			      symtab_idx);
+		/* Fix endianness */
+		for (p = info->symtab_shndx_start; p < info->symtab_shndx_stop;
+		     p++)
+			*p = TO_NATIVE(*p);
+	}
+
+	symsearch_init(info);
+
+	return 1;
+}
+
+static void parse_elf_finish(struct elf_info *info)
+{
+	symsearch_finish(info);
+	release_file(info->hdr, info->size);
+}
+
+static int ignore_undef_symbol(struct elf_info *info, const char *symname)
+{
+	/* ignore __this_module, it will be resolved shortly */
+	if (strcmp(symname, "__this_module") == 0)
+		return 1;
+	/* ignore global offset table */
+	if (strcmp(symname, "_GLOBAL_OFFSET_TABLE_") == 0)
+		return 1;
+	if (info->hdr->e_machine == EM_PPC)
+		/* Special register function linked on all modules during final link of .ko */
+		if (strstarts(symname, "_restgpr_") ||
+		    strstarts(symname, "_savegpr_") ||
+		    strstarts(symname, "_rest32gpr_") ||
+		    strstarts(symname, "_save32gpr_") ||
+		    strstarts(symname, "_restvr_") ||
+		    strstarts(symname, "_savevr_"))
+			return 1;
+	if (info->hdr->e_machine == EM_PPC64)
+		/* Special register function linked on all modules during final link of .ko */
+		if (strstarts(symname, "_restgpr0_") ||
+		    strstarts(symname, "_savegpr0_") ||
+		    strstarts(symname, "_restgpr1_") ||
+		    strstarts(symname, "_savegpr1_") ||
+		    strstarts(symname, "_restfpr_") ||
+		    strstarts(symname, "_savefpr_") ||
+		    strstarts(symname, "_restvr_") ||
+		    strstarts(symname, "_savevr_") ||
+		    strcmp(symname, ".TOC.") == 0)
+			return 1;
+
+	/* ignore linker-created section bounds variables */
+	if (strstarts(symname, "__start_") || strstarts(symname, "__stop_"))
+		return 1;
+
+	/* Do not ignore this symbol */
+	return 0;
+}
+
+static void handle_symbol(struct module *mod, struct elf_info *info,
+			  const Elf_Sym *sym, const char *symname)
+{
+	switch (sym->st_shndx) {
+	case SHN_COMMON:
+		if (strstarts(symname, "__gnu_lto_")) {
+			/* Should warn here, but modpost runs before the linker */
+		} else
+			mod_warn(mod, "'%s' is COMMON symbol\n", symname);
+		break;
+	case SHN_UNDEF:
+		/* undefined symbol */
+		if (ELF_ST_BIND(sym->st_info) != STB_GLOBAL &&
+		    ELF_ST_BIND(sym->st_info) != STB_WEAK)
+			break;
+		if (ignore_undef_symbol(info, symname))
+			break;
+		if (info->hdr->e_machine == EM_SPARC ||
+		    info->hdr->e_machine == EM_SPARCV9) {
+			/* Ignore register directives. */
+			if (ELF_ST_TYPE(sym->st_info) == STT_SPARC_REGISTER)
+				break;
+			if (symname[0] == '.') {
+				char *munged = xstrdup(symname);
+				munged[0] = '_';
+				munged[1] = toupper(munged[1]);
+				symname = munged;
+			}
+		}
+
+		sym_add_unresolved(symname, mod,
+				   ELF_ST_BIND(sym->st_info) == STB_WEAK);
+		break;
+	default:
+		if (strcmp(symname, "init_module") == 0)
+			mod->has_init = true;
+		if (strcmp(symname, "cleanup_module") == 0)
+			mod->has_cleanup = true;
+		break;
+	}
+}
+
+/**
+ * Parse tag=value strings from .modinfo section
+ **/
+static char *next_string(char *string, unsigned long *secsize)
+{
+	/* Skip non-zero chars */
+	while (string[0]) {
+		string++;
+		if ((*secsize)-- <= 1)
+			return NULL;
+	}
+
+	/* Skip any zero padding. */
+	while (!string[0]) {
+		string++;
+		if ((*secsize)-- <= 1)
+			return NULL;
+	}
+	return string;
+}
+
+static char *get_next_modinfo(struct elf_info *info, const char *tag,
+			      char *prev)
+{
+	char *p;
+	unsigned int taglen = strlen(tag);
+	char *modinfo = info->modinfo;
+	unsigned long size = info->modinfo_len;
+
+	if (prev) {
+		size -= prev - modinfo;
+		modinfo = next_string(prev, &size);
+	}
+
+	for (p = modinfo; p; p = next_string(p, &size)) {
+		if (strncmp(p, tag, taglen) == 0 && p[taglen] == '=')
+			return p + taglen + 1;
+	}
+	return NULL;
+}
+
+static char *get_modinfo(struct elf_info *info, const char *tag)
+
+{
+	return get_next_modinfo(info, tag, NULL);
+}
+
+static const char *sym_name(struct elf_info *elf, Elf_Sym *sym)
+{
+	return sym ? elf->strtab + sym->st_name : "";
+}
+
+/*
+ * Check whether the 'string' argument matches one of the 'patterns',
+ * an array of shell wildcard patterns (glob).
+ *
+ * Return true is there is a match.
+ */
+static bool match(const char *string, const char *const patterns[])
+{
+	const char *pattern;
+
+	while ((pattern = *patterns++)) {
+		if (!fnmatch(pattern, string, 0))
+			return true;
+	}
+
+	return false;
+}
+
+/* useful to pass patterns to match() directly */
+#define PATTERNS(...) \
+	({ \
+		static const char *const patterns[] = {__VA_ARGS__, NULL}; \
+		patterns; \
+	})
+
+/* sections that we do not want to do full section mismatch check on */
+static const char *const section_white_list[] =
+{
+	".comment*",
+	".debug*",
+	".zdebug*",		/* Compressed debug sections. */
+	".GCC.command.line",	/* record-gcc-switches */
+	".mdebug*",        /* alpha, score, mips etc. */
+	".pdr",            /* alpha, score, mips etc. */
+	".stab*",
+	".note*",
+	".got*",
+	".toc*",
+	".xt.prop",				 /* xtensa */
+	".xt.lit",         /* xtensa */
+	".arcextmap*",			/* arc */
+	".gnu.linkonce.arcext*",	/* arc : modules */
+	".cmem*",			/* EZchip */
+	".fmt_slot*",			/* EZchip */
+	".gnu.lto*",
+	".discard.*",
+	".llvm.call-graph-profile",	/* call graph */
+	"__llvm_covfun",
+	"__llvm_covmap",
+	".klp.symid",			/* objtool --klp-symids */
+	NULL
+};
+
+/*
+ * This is used to find sections missing the SHF_ALLOC flag.
+ * The cause of this is often a section specified in assembler
+ * without "ax" / "aw".
+ */
+static void check_section(struct module *mod, struct elf_info *elf,
+			  Elf_Shdr *sechdr)
+{
+	const char *sec = sech_name(elf, sechdr);
+
+	if (sechdr->sh_type == SHT_PROGBITS &&
+	    !(sechdr->sh_flags & SHF_ALLOC) &&
+	    !match(sec, section_white_list)) {
+		mod_warn(mod, "unexpected non-allocatable section '%s'.\n"
+			 "Did you forget to use \"ax\"/\"aw\" in a .S file?\n"
+			 "Note that for example <linux/init.h> contains\n"
+			 "section definitions for use in .S files.\n\n",
+			 sec);
+	}
+}
+
+
+
+#define ALL_INIT_DATA_SECTIONS \
+	".init.setup", ".init.rodata", ".init.data"
+
+#define ALL_PCI_INIT_SECTIONS	\
+	".pci_fixup_early", ".pci_fixup_header", ".pci_fixup_final", \
+	".pci_fixup_enable", ".pci_fixup_resume", \
+	".pci_fixup_resume_early", ".pci_fixup_suspend"
+
+#define ALL_INIT_SECTIONS ".init.*"
+#define ALL_EXIT_SECTIONS ".exit.*"
+
+#define DATA_SECTIONS ".data", ".data.rel"
+#define TEXT_SECTIONS ".text", ".text.*", ".sched.text", \
+		".kprobes.text", ".cpuidle.text", ".noinstr.text", \
+		".ltext", ".ltext.*"
+#define OTHER_TEXT_SECTIONS ".ref.text", ".head.text", ".spinlock.text", \
+		".fixup", ".entry.text", ".exception.text", \
+		".coldtext", ".softirqentry.text", ".irqentry.text"
+
+#define ALL_TEXT_SECTIONS  ".init.text", ".exit.text", \
+		TEXT_SECTIONS, OTHER_TEXT_SECTIONS
+
+enum mismatch {
+	TEXTDATA_TO_ANY_INIT_EXIT,
+	XXXINIT_TO_SOME_INIT,
+	ANY_INIT_TO_ANY_EXIT,
+	ANY_EXIT_TO_ANY_INIT,
+	EXTABLE_TO_NON_TEXT,
+};
+
+/**
+ * Describe how to match sections on different criteria:
+ *
+ * @fromsec: Array of sections to be matched.
+ *
+ * @bad_tosec: Relocations applied to a section in @fromsec to a section in
+ * this array is forbidden (black-list).  Can be empty.
+ *
+ * @good_tosec: Relocations applied to a section in @fromsec must be
+ * targeting sections in this array (white-list).  Can be empty.
+ *
+ * @mismatch: Type of mismatch.
+ */
+struct sectioncheck {
+	const char *fromsec[20];
+	const char *bad_tosec[20];
+	const char *good_tosec[20];
+	enum mismatch mismatch;
+};
+
+static const struct sectioncheck sectioncheck[] = {
+/* Do not reference init/exit code/data from
+ * normal code and data
+ */
+{
+	.fromsec = { TEXT_SECTIONS, DATA_SECTIONS, NULL },
+	.bad_tosec = { ALL_INIT_SECTIONS, ALL_EXIT_SECTIONS, NULL },
+	.mismatch = TEXTDATA_TO_ANY_INIT_EXIT,
+},
+/* Do not use exit code/data from init code */
+{
+	.fromsec = { ALL_INIT_SECTIONS, NULL },
+	.bad_tosec = { ALL_EXIT_SECTIONS, NULL },
+	.mismatch = ANY_INIT_TO_ANY_EXIT,
+},
+/* Do not use init code/data from exit code */
+{
+	.fromsec = { ALL_EXIT_SECTIONS, NULL },
+	.bad_tosec = { ALL_INIT_SECTIONS, NULL },
+	.mismatch = ANY_EXIT_TO_ANY_INIT,
+},
+{
+	.fromsec = { ALL_PCI_INIT_SECTIONS, NULL },
+	.bad_tosec = { ALL_INIT_SECTIONS, NULL },
+	.mismatch = ANY_INIT_TO_ANY_EXIT,
+},
+{
+	.fromsec = { "__ex_table", NULL },
+	/* If you're adding any new black-listed sections in here, consider
+	 * adding a special 'printer' for them in scripts/check_extable.
+	 */
+	.bad_tosec = { ".altinstr_replacement", NULL },
+	.good_tosec = {ALL_TEXT_SECTIONS , NULL},
+	.mismatch = EXTABLE_TO_NON_TEXT,
+}
+};
+
+static const struct sectioncheck *section_mismatch(
+		const char *fromsec, const char *tosec)
+{
+	int i;
+
+	/*
+	 * The target section could be the SHT_NUL section when we're
+	 * handling relocations to un-resolved symbols, trying to match it
+	 * doesn't make much sense and causes build failures on parisc
+	 * architectures.
+	 */
+	if (*tosec == '\0')
+		return NULL;
+
+	for (i = 0; i < ARRAY_SIZE(sectioncheck); i++) {
+		const struct sectioncheck *check = &sectioncheck[i];
+
+		if (match(fromsec, check->fromsec)) {
+			if (check->bad_tosec[0] && match(tosec, check->bad_tosec))
+				return check;
+			if (check->good_tosec[0] && !match(tosec, check->good_tosec))
+				return check;
+		}
+	}
+	return NULL;
+}
+
+/**
+ * Whitelist to allow certain references to pass with no warning.
+ *
+ * Pattern 1:
+ *   If a module parameter is declared __initdata and permissions=0
+ *   then this is legal despite the warning generated.
+ *   We cannot see value of permissions here, so just ignore
+ *   this pattern.
+ *   The pattern is identified by:
+ *   tosec   = .init.data
+ *   fromsec = .data*
+ *   atsym   =__param*
+ *
+ * Pattern 1a:
+ *   module_param_call() ops can refer to __init set function if permissions=0
+ *   The pattern is identified by:
+ *   tosec   = .init.text
+ *   fromsec = .data*
+ *   atsym   = __param_ops_*
+ *
+ * Pattern 3:
+ *   Whitelist all references from .head.text to any init section
+ *
+ * Pattern 4:
+ *   Some symbols belong to init section but still it is ok to reference
+ *   these from non-init sections as these symbols don't have any memory
+ *   allocated for them and symbol address and value are same. So even
+ *   if init section is freed, its ok to reference those symbols.
+ *   For ex. symbols marking the init section boundaries.
+ *   This pattern is identified by
+ *   refsymname = __init_begin, _sinittext, _einittext
+ *
+ * Pattern 5:
+ *   GCC may optimize static inlines when fed constant arg(s) resulting
+ *   in functions like cpumask_empty() -- generating an associated symbol
+ *   cpumask_empty.constprop.3 that appears in the audit.  If the const that
+ *   is passed in comes from __init, like say nmi_ipi_mask, we get a
+ *   meaningless section warning.  May need to add isra symbols too...
+ *   This pattern is identified by
+ *   tosec   = init section
+ *   fromsec = text section
+ *   refsymname = *.constprop.*
+ *
+ **/
+static int secref_whitelist(const char *fromsec, const char *fromsym,
+			    const char *tosec, const char *tosym)
+{
+	/* Check for pattern 1 */
+	if (match(tosec, PATTERNS(ALL_INIT_DATA_SECTIONS)) &&
+	    match(fromsec, PATTERNS(DATA_SECTIONS)) &&
+	    strstarts(fromsym, "__param"))
+		return 0;
+
+	/* Check for pattern 1a */
+	if (strcmp(tosec, ".init.text") == 0 &&
+	    match(fromsec, PATTERNS(DATA_SECTIONS)) &&
+	    strstarts(fromsym, "__param_ops_"))
+		return 0;
+
+	/* symbols in data sections that may refer to any init/exit sections */
+	if (match(fromsec, PATTERNS(DATA_SECTIONS)) &&
+	    match(tosec, PATTERNS(ALL_INIT_SECTIONS, ALL_EXIT_SECTIONS)) &&
+	    match(fromsym, PATTERNS("*_ops", "*_ops.llvm.*", "*_console")))
+		return 0;
+
+	/* Check for pattern 3 */
+	if (strstarts(fromsec, ".head.text") &&
+	    match(tosec, PATTERNS(ALL_INIT_SECTIONS)))
+		return 0;
+
+	/* Check for pattern 4 */
+	if (match(tosym, PATTERNS("__init_begin", "_sinittext", "_einittext")))
+		return 0;
+
+	/* Check for pattern 5 */
+	if (match(fromsec, PATTERNS(ALL_TEXT_SECTIONS)) &&
+	    match(tosec, PATTERNS(ALL_INIT_SECTIONS)) &&
+	    match(fromsym, PATTERNS("*.constprop.*")))
+		return 0;
+
+	return 1;
+}
+
+static Elf_Sym *find_fromsym(struct elf_info *elf, Elf_Addr addr,
+			     unsigned int secndx)
+{
+	return symsearch_find_nearest(elf, addr, secndx, false, ~0);
+}
+
+static Elf_Sym *find_tosym(struct elf_info *elf, Elf_Addr addr, Elf_Sym *sym)
+{
+	Elf_Sym *new_sym;
+
+	/* If the supplied symbol has a valid name, return it */
+	if (is_valid_name(elf, sym))
+		return sym;
+
+	/*
+	 * Strive to find a better symbol name, but the resulting name may not
+	 * match the symbol referenced in the original code.
+	 */
+	new_sym = symsearch_find_nearest(elf, addr, get_secindex(elf, sym),
+					 true, 20);
+	return new_sym ? new_sym : sym;
+}
+
+static bool is_executable_section(struct elf_info *elf, unsigned int secndx)
+{
+	if (secndx >= elf->num_sections)
+		return false;
+
+	return (elf->sechdrs[secndx].sh_flags & SHF_EXECINSTR) != 0;
+}
+
+static void default_mismatch_handler(struct module *mod, struct elf_info *elf,
+				     const struct sectioncheck* const mismatch,
+				     Elf_Sym *tsym,
+				     unsigned int fsecndx, const char *fromsec, Elf_Addr faddr,
+				     const char *tosec, Elf_Addr taddr)
+{
+	Elf_Sym *from;
+	const char *tosym;
+	const char *fromsym;
+	char taddr_str[16];
+
+	from = find_fromsym(elf, faddr, fsecndx);
+	fromsym = sym_name(elf, from);
+
+	tsym = find_tosym(elf, taddr, tsym);
+	tosym = sym_name(elf, tsym);
+
+	/* check whitelist - we may ignore it */
+	if (!secref_whitelist(fromsec, fromsym, tosec, tosym))
+		return;
+
+	sec_mismatch_count++;
+
+	if (!tosym[0])
+		snprintf(taddr_str, sizeof(taddr_str), "0x%x", (unsigned int)taddr);
+
+	/*
+	 * The format for the reference source:      <symbol_name>+<offset> or <address>
+	 * The format for the reference destination: <symbol_name>          or <address>
+	 */
+	mod_warn(mod, "section mismatch in reference: %s%s0x%x (section: %s) -> %s (section: %s)\n",
+		 fromsym, fromsym[0] ? "+" : "",
+		 (unsigned int)(faddr - (fromsym[0] ? from->st_value : 0)),
+		 fromsec, tosym[0] ? tosym : taddr_str, tosec);
+
+	if (mismatch->mismatch == EXTABLE_TO_NON_TEXT) {
+		if (match(tosec, mismatch->bad_tosec))
+			fatal("The relocation at %s+0x%lx references\n"
+			      "section \"%s\" which is black-listed.\n"
+			      "Something is seriously wrong and should be fixed.\n"
+			      "You might get more information about where this is\n"
+			      "coming from by using scripts/check_extable.sh %s\n",
+			      fromsec, (long)faddr, tosec, mod->name);
+		else if (is_executable_section(elf, get_secindex(elf, tsym)))
+			warn("The relocation at %s+0x%lx references\n"
+			     "section \"%s\" which is not in the list of\n"
+			     "authorized sections.  If you're adding a new section\n"
+			     "and/or if this reference is valid, add \"%s\" to the\n"
+			     "list of authorized sections to jump to on fault.\n"
+			     "This can be achieved by adding \"%s\" to\n"
+			     "OTHER_TEXT_SECTIONS in scripts/mod/modpost.c.\n",
+			     fromsec, (long)faddr, tosec, tosec, tosec);
+		else
+			error("%s+0x%lx references non-executable section '%s'\n",
+			      fromsec, (long)faddr, tosec);
+	}
+}
+
+static void check_export_symbol(struct module *mod, struct elf_info *elf,
+				Elf_Addr faddr, const char *secname,
+				Elf_Sym *sym)
+{
+	static const char *prefix = "__export_symbol_";
+	const char *label_name, *name, *data;
+	Elf_Sym *label;
+	struct symbol *s;
+	bool is_gpl;
+
+	label = find_fromsym(elf, faddr, elf->export_symbol_secndx);
+	label_name = sym_name(elf, label);
+
+	if (!strstarts(label_name, prefix)) {
+		mod_error(mod, ".export_symbol section contains strange symbol '%s'\n",
+			  label_name);
+		return;
+	}
+
+	if (ELF_ST_BIND(sym->st_info) != STB_GLOBAL &&
+	    ELF_ST_BIND(sym->st_info) != STB_WEAK) {
+		mod_error(mod, "local symbol '%s' was exported\n",
+			  label_name + strlen(prefix));
+		return;
+	}
+
+	name = sym_name(elf, sym);
+	if (strcmp(label_name + strlen(prefix), name)) {
+		mod_error(mod, ".export_symbol section references '%s', but it does not seem to be an export symbol\n",
+			  name);
+		return;
+	}
+
+	data = sym_get_data(elf, label);	/* license */
+	if (!strcmp(data, "GPL")) {
+		is_gpl = true;
+	} else if (!strcmp(data, "")) {
+		is_gpl = false;
+	} else {
+		mod_error(mod, "unknown license '%s' was specified for '%s'\n",
+			  data, name);
+		return;
+	}
+
+	data += strlen(data) + 1;	/* namespace */
+	s = sym_add_exported(name, mod, is_gpl, data);
+
+	/*
+	 * We need to be aware whether we are exporting a function or
+	 * a data on some architectures.
+	 */
+	s->is_func = (ELF_ST_TYPE(sym->st_info) == STT_FUNC);
+
+	/*
+	 * For parisc64, symbols prefixed $$ from the library have the symbol type
+	 * STT_LOPROC. They should be handled as functions too.
+	 */
+	if (elf->hdr->e_ident[EI_CLASS] == ELFCLASS64 &&
+	    elf->hdr->e_machine == EM_PARISC &&
+	    ELF_ST_TYPE(sym->st_info) == STT_LOPROC)
+		s->is_func = true;
+
+	if (match(secname, PATTERNS(ALL_INIT_SECTIONS)))
+		mod_warn(mod, "EXPORT_SYMBOL used for init symbol '%s'. Remove __init or EXPORT_SYMBOL.\n",
+			 name);
+	else if (match(secname, PATTERNS(ALL_EXIT_SECTIONS)))
+		mod_warn(mod, "EXPORT_SYMBOL used for exit symbol '%s'. Remove __exit or EXPORT_SYMBOL.\n",
+			 name);
+}
+
+static void check_section_mismatch(struct module *mod, struct elf_info *elf,
+				   Elf_Sym *sym,
+				   unsigned int fsecndx, const char *fromsec,
+				   Elf_Addr faddr, Elf_Addr taddr)
+{
+	const char *tosec = sec_name(elf, get_secindex(elf, sym));
+	const struct sectioncheck *mismatch;
+
+	if (module_enabled && elf->export_symbol_secndx == fsecndx) {
+		check_export_symbol(mod, elf, faddr, tosec, sym);
+		return;
+	}
+
+	mismatch = section_mismatch(fromsec, tosec);
+	if (!mismatch)
+		return;
+
+	default_mismatch_handler(mod, elf, mismatch, sym,
+				 fsecndx, fromsec, faddr,
+				 tosec, taddr);
+}
+
+static Elf_Addr addend_386_rel(uint32_t *location, unsigned int r_type)
+{
+	switch (r_type) {
+	case R_386_32:
+		return get_unaligned_native(location);
+	case R_386_PC32:
+		return get_unaligned_native(location) + 4;
+	}
+
+	return (Elf_Addr)(-1);
+}
+
+static int32_t sign_extend32(int32_t value, int index)
+{
+	uint8_t shift = 31 - index;
+
+	return (int32_t)(value << shift) >> shift;
+}
+
+static Elf_Addr addend_arm_rel(void *loc, Elf_Sym *sym, unsigned int r_type)
+{
+	uint32_t inst, upper, lower, sign, j1, j2;
+	int32_t offset;
+
+	switch (r_type) {
+	case R_ARM_ABS32:
+	case R_ARM_REL32:
+		inst = get_unaligned_native((uint32_t *)loc);
+		return inst + sym->st_value;
+	case R_ARM_MOVW_ABS_NC:
+	case R_ARM_MOVT_ABS:
+		inst = get_unaligned_native((uint32_t *)loc);
+		offset = sign_extend32(((inst & 0xf0000) >> 4) | (inst & 0xfff),
+				       15);
+		return offset + sym->st_value;
+	case R_ARM_PC24:
+	case R_ARM_CALL:
+	case R_ARM_JUMP24:
+		inst = get_unaligned_native((uint32_t *)loc);
+		offset = sign_extend32((inst & 0x00ffffff) << 2, 25);
+		return offset + sym->st_value + 8;
+	case R_ARM_THM_MOVW_ABS_NC:
+	case R_ARM_THM_MOVT_ABS:
+		upper = get_unaligned_native((uint16_t *)loc);
+		lower = get_unaligned_native((uint16_t *)loc + 1);
+		offset = sign_extend32(((upper & 0x000f) << 12) |
+				       ((upper & 0x0400) << 1) |
+				       ((lower & 0x7000) >> 4) |
+				       (lower & 0x00ff),
+				       15);
+		return offset + sym->st_value;
+	case R_ARM_THM_JUMP19:
+		/*
+		 * Encoding T3:
+		 * S     = upper[10]
+		 * imm6  = upper[5:0]
+		 * J1    = lower[13]
+		 * J2    = lower[11]
+		 * imm11 = lower[10:0]
+		 * imm32 = SignExtend(S:J2:J1:imm6:imm11:'0')
+		 */
+		upper = get_unaligned_native((uint16_t *)loc);
+		lower = get_unaligned_native((uint16_t *)loc + 1);
+
+		sign = (upper >> 10) & 1;
+		j1 = (lower >> 13) & 1;
+		j2 = (lower >> 11) & 1;
+		offset = sign_extend32((sign << 20) | (j2 << 19) | (j1 << 18) |
+				       ((upper & 0x03f) << 12) |
+				       ((lower & 0x07ff) << 1),
+				       20);
+		return offset + sym->st_value + 4;
+	case R_ARM_THM_PC22:
+	case R_ARM_THM_JUMP24:
+		/*
+		 * Encoding T4:
+		 * S     = upper[10]
+		 * imm10 = upper[9:0]
+		 * J1    = lower[13]
+		 * J2    = lower[11]
+		 * imm11 = lower[10:0]
+		 * I1    = NOT(J1 XOR S)
+		 * I2    = NOT(J2 XOR S)
+		 * imm32 = SignExtend(S:I1:I2:imm10:imm11:'0')
+		 */
+		upper = get_unaligned_native((uint16_t *)loc);
+		lower = get_unaligned_native((uint16_t *)loc + 1);
+
+		sign = (upper >> 10) & 1;
+		j1 = (lower >> 13) & 1;
+		j2 = (lower >> 11) & 1;
+		offset = sign_extend32((sign << 24) |
+				       ((~(j1 ^ sign) & 1) << 23) |
+				       ((~(j2 ^ sign) & 1) << 22) |
+				       ((upper & 0x03ff) << 12) |
+				       ((lower & 0x07ff) << 1),
+				       24);
+		return offset + sym->st_value + 4;
+	}
+
+	return (Elf_Addr)(-1);
+}
+
+static Elf_Addr addend_mips_rel(uint32_t *location, unsigned int r_type)
+{
+	uint32_t inst;
+
+	inst = get_unaligned_native(location);
+	switch (r_type) {
+	case R_MIPS_LO16:
+		return inst & 0xffff;
+	case R_MIPS_26:
+		return (inst & 0x03ffffff) << 2;
+	case R_MIPS_32:
+		return inst;
+	}
+	return (Elf_Addr)(-1);
+}
+
+#ifndef EM_RISCV
+#define EM_RISCV		243
+#endif
+
+#ifndef R_RISCV_SUB32
+#define R_RISCV_SUB32		39
+#endif
+
+#ifndef EM_LOONGARCH
+#define EM_LOONGARCH		258
+#endif
+
+#ifndef R_LARCH_SUB32
+#define R_LARCH_SUB32		55
+#endif
+
+#ifndef R_LARCH_RELAX
+#define R_LARCH_RELAX		100
+#endif
+
+#ifndef R_LARCH_ALIGN
+#define R_LARCH_ALIGN		102
+#endif
+
+static void get_rel_type_and_sym(struct elf_info *elf, uint64_t r_info,
+				 unsigned int *r_type, unsigned int *r_sym)
+{
+	typedef struct {
+		Elf64_Word    r_sym;	/* Symbol index */
+		unsigned char r_ssym;	/* Special symbol for 2nd relocation */
+		unsigned char r_type3;	/* 3rd relocation type */
+		unsigned char r_type2;	/* 2nd relocation type */
+		unsigned char r_type;	/* 1st relocation type */
+	} Elf64_Mips_R_Info;
+
+	bool is_64bit = (elf->hdr->e_ident[EI_CLASS] == ELFCLASS64);
+
+	if (elf->hdr->e_machine == EM_MIPS && is_64bit) {
+		Elf64_Mips_R_Info *mips64_r_info = (void *)&r_info;
+
+		*r_type = mips64_r_info->r_type;
+		*r_sym = TO_NATIVE(mips64_r_info->r_sym);
+		return;
+	}
+
+	if (is_64bit)
+		r_info = TO_NATIVE((Elf64_Xword)r_info);
+	else
+		r_info = TO_NATIVE((Elf32_Word)r_info);
+
+	*r_type = ELF_R_TYPE(r_info);
+	*r_sym = ELF_R_SYM(r_info);
+}
+
+static void section_rela(struct module *mod, struct elf_info *elf,
+			 unsigned int fsecndx, const char *fromsec,
+			 const Elf_Rela *start, const Elf_Rela *stop)
+{
+	const Elf_Rela *rela;
+
+	for (rela = start; rela < stop; rela++) {
+		Elf_Sym *tsym;
+		Elf_Addr taddr, r_offset;
+		unsigned int r_type, r_sym;
+
+		r_offset = TO_NATIVE(rela->r_offset);
+		get_rel_type_and_sym(elf, rela->r_info, &r_type, &r_sym);
+
+		tsym = elf->symtab_start + r_sym;
+		taddr = tsym->st_value + TO_NATIVE(rela->r_addend);
+
+		switch (elf->hdr->e_machine) {
+		case EM_RISCV:
+			if (!strcmp("__ex_table", fromsec) &&
+			    r_type == R_RISCV_SUB32)
+				continue;
+			break;
+		case EM_LOONGARCH:
+			switch (r_type) {
+			case R_LARCH_SUB32:
+				if (!strcmp("__ex_table", fromsec))
+					continue;
+				break;
+			case R_LARCH_RELAX:
+			case R_LARCH_ALIGN:
+				/* These relocs do not refer to symbols */
+				continue;
+			}
+			break;
+		}
+
+		check_section_mismatch(mod, elf, tsym,
+				       fsecndx, fromsec, r_offset, taddr);
+	}
+}
+
+static void section_rel(struct module *mod, struct elf_info *elf,
+			unsigned int fsecndx, const char *fromsec,
+			const Elf_Rel *start, const Elf_Rel *stop)
+{
+	const Elf_Rel *rel;
+
+	for (rel = start; rel < stop; rel++) {
+		Elf_Sym *tsym;
+		Elf_Addr taddr, r_offset;
+		unsigned int r_type, r_sym;
+		void *loc;
+
+		r_offset = TO_NATIVE(rel->r_offset);
+		get_rel_type_and_sym(elf, rel->r_info, &r_type, &r_sym);
+
+		loc = sym_get_data_by_offset(elf, fsecndx, r_offset);
+		tsym = elf->symtab_start + r_sym;
+
+		switch (elf->hdr->e_machine) {
+		case EM_386:
+			taddr = addend_386_rel(loc, r_type);
+			break;
+		case EM_ARM:
+			taddr = addend_arm_rel(loc, tsym, r_type);
+			break;
+		case EM_MIPS:
+			taddr = addend_mips_rel(loc, r_type);
+			break;
+		default:
+			fatal("Please add code to calculate addend for this architecture\n");
+		}
+
+		check_section_mismatch(mod, elf, tsym,
+				       fsecndx, fromsec, r_offset, taddr);
+	}
+}
+
+/**
+ * A module includes a number of sections that are discarded
+ * either when loaded or when used as built-in.
+ * For loaded modules all functions marked __init and all data
+ * marked __initdata will be discarded when the module has been initialized.
+ * Likewise for modules used built-in the sections marked __exit
+ * are discarded because __exit marked function are supposed to be called
+ * only when a module is unloaded which never happens for built-in modules.
+ * The check_sec_ref() function traverses all relocation records
+ * to find all references to a section that reference a section that will
+ * be discarded and warns about it.
+ **/
+static void check_sec_ref(struct module *mod, struct elf_info *elf)
+{
+	int i;
+
+	/* Walk through all sections */
+	for (i = 0; i < elf->num_sections; i++) {
+		Elf_Shdr *sechdr = &elf->sechdrs[i];
+
+		check_section(mod, elf, sechdr);
+		/* We want to process only relocation sections and not .init */
+		if (sechdr->sh_type == SHT_REL || sechdr->sh_type == SHT_RELA) {
+			/* section to which the relocation applies */
+			unsigned int secndx = sechdr->sh_info;
+			const char *secname = sec_name(elf, secndx);
+			const void *start, *stop;
+
+			/* If the section is known good, skip it */
+			if (match(secname, section_white_list))
+				continue;
+
+			start = sym_get_data_by_offset(elf, i, 0);
+			stop = start + sechdr->sh_size;
+
+			if (sechdr->sh_type == SHT_RELA)
+				section_rela(mod, elf, secndx, secname,
+					     start, stop);
+			else
+				section_rel(mod, elf, secndx, secname,
+					    start, stop);
+		}
+	}
+}
+
+static char *remove_dot(char *s)
+{
+	size_t n = strcspn(s, ".");
+
+	if (n && s[n]) {
+		size_t m = strspn(s + n + 1, "0123456789");
+		if (m && (s[n + m + 1] == '.' || s[n + m + 1] == 0))
+			s[n] = 0;
+	}
+	return s;
+}
+
+/*
+ * The CRCs are recorded in .*.cmd files in the form of:
+ * #SYMVER <name> <crc>
+ */
+static void extract_crcs_for_object(const char *object, struct module *mod)
+{
+	char cmd_file[PATH_MAX];
+	char *buf, *p;
+	const char *base;
+	int dirlen, baselen_without_suffix, ret;
+
+	base = get_basename(object);
+	dirlen = base - object;
+
+	baselen_without_suffix = strlen(object) - dirlen - strlen(".o");
+
+	/*
+	 * When CONFIG_LTO_CLANG_THIN_DIST=y, the ELF is *.thinlto-native.o
+	 * but the symbol CRCs are recorded in *.o.cmd file.
+	 */
+	if (strends(object, ".thinlto-native.o"))
+		baselen_without_suffix -= strlen(".thinlto-native");
+
+	ret = snprintf(cmd_file, sizeof(cmd_file), "%.*s.%.*s.o.cmd",
+		       dirlen, object, baselen_without_suffix, base);
+	if (ret >= sizeof(cmd_file)) {
+		error("%s: too long path was truncated\n", cmd_file);
+		return;
+	}
+
+	buf = read_text_file(cmd_file);
+	p = buf;
+
+	while ((p = strstr(p, "\n#SYMVER "))) {
+		char *name;
+		size_t namelen;
+		unsigned int crc;
+		struct symbol *sym;
+
+		name = p + strlen("\n#SYMVER ");
+
+		p = strchr(name, ' ');
+		if (!p)
+			break;
+
+		namelen = p - name;
+		p++;
+
+		if (!isdigit(*p))
+			continue;	/* skip this line */
+
+		crc = strtoul(p, &p, 0);
+		if (*p != '\n')
+			continue;	/* skip this line */
+
+		name[namelen] = '\0';
+
+		/*
+		 * sym_find_with_module() may return NULL here.
+		 * It typically occurs when CONFIG_TRIM_UNUSED_KSYMS=y.
+		 * Since commit e1327a127703, genksyms calculates CRCs of all
+		 * symbols, including trimmed ones. Ignore orphan CRCs.
+		 */
+		sym = sym_find_with_module(name, mod);
+		if (sym)
+			sym_set_crc(sym, crc);
+	}
+
+	free(buf);
+}
+
+/*
+ * The symbol versions (CRC) are recorded in the .*.cmd files.
+ * Parse them to retrieve CRCs for the current module.
+ */
+static void mod_set_crcs(struct module *mod)
+{
+	char objlist[PATH_MAX];
+	char *buf, *p, *obj;
+	int ret;
+
+	if (mod->is_vmlinux) {
+		strcpy(objlist, ".vmlinux.objs");
+	} else {
+		/* objects for a module are listed in the *.mod file. */
+		ret = snprintf(objlist, sizeof(objlist), "%s.mod", mod->name);
+		if (ret >= sizeof(objlist)) {
+			error("%s: too long path was truncated\n", objlist);
+			return;
+		}
+	}
+
+	buf = read_text_file(objlist);
+	p = buf;
+
+	while ((obj = strsep(&p, "\n")) && obj[0])
+		extract_crcs_for_object(obj, mod);
+
+	free(buf);
+}
+
+static void read_symbols(const char *modname)
+{
+	const char *symname;
+	char *version;
+	char *license;
+	char *namespace;
+	struct module *mod;
+	struct elf_info info = { };
+	Elf_Sym *sym;
+
+	if (!strends(modname, ".o")) {
+		error("%s: filename must be suffixed with .o\n", modname);
+		return;
+	}
+
+	if (!parse_elf(&info, modname))
+		return;
+
+	/* strip trailing .o */
+	mod = new_module(modname, strlen(modname) - strlen(".o"));
+
+	/* save .no_trim_symbol section for later use */
+	if (info.no_trim_symbol_len) {
+		mod->no_trim_symbol = xmalloc(info.no_trim_symbol_len);
+		memcpy(mod->no_trim_symbol, info.no_trim_symbol,
+		       info.no_trim_symbol_len);
+		mod->no_trim_symbol_len = info.no_trim_symbol_len;
+	}
+
+	if (!mod->is_vmlinux) {
+		license = get_modinfo(&info, "license");
+		if (!license)
+			mod_error(mod, "missing MODULE_LICENSE()\n");
+		while (license) {
+			if (!license_is_gpl_compatible(license)) {
+				mod->is_gpl_compatible = false;
+				break;
+			}
+			license = get_next_modinfo(&info, "license", license);
+		}
+
+		for (namespace = get_modinfo(&info, "import_ns");
+		     namespace;
+		     namespace = get_next_modinfo(&info, "import_ns", namespace)) {
+			if (strstarts(namespace, MODULE_NS_PREFIX))
+				mod_error(mod, "explicitly importing namespace '%s' is not allowed.\n",
+					  namespace);
+
+			add_namespace(&mod->imported_namespaces, namespace);
+		}
+
+		if (!get_modinfo(&info, "description"))
+			mod_warn(mod, "missing MODULE_DESCRIPTION()\n");
+	}
+
+	for (sym = info.symtab_start; sym < info.symtab_stop; sym++) {
+		symname = remove_dot(info.strtab + sym->st_name);
+
+		handle_symbol(mod, &info, sym, symname);
+		handle_moddevtable(mod, &info, sym, symname);
+	}
+
+	check_sec_ref(mod, &info);
+
+	if (!mod->is_vmlinux) {
+		version = get_modinfo(&info, "version");
+		if (version || all_versions)
+			get_src_version(mod->name, mod->srcversion,
+					sizeof(mod->srcversion) - 1);
+	}
+
+	parse_elf_finish(&info);
+
+	if (modversions) {
+		/*
+		 * Our trick to get versioning for module struct etc. - it's
+		 * never passed as an argument to an exported function, so
+		 * the automatic versioning doesn't pick it up, but it's really
+		 * important anyhow.
+		 */
+		sym_add_unresolved("module_layout", mod, false);
+
+		mod_set_crcs(mod);
+	}
+}
+
+static void read_symbols_from_files(const char *filename)
+{
+	FILE *in = stdin;
+	char fname[PATH_MAX];
+
+	in = fopen(filename, "r");
+	if (!in)
+		fatal("Can't open filenames file %s: %m", filename);
+
+	while (fgets(fname, PATH_MAX, in) != NULL) {
+		if (strends(fname, "\n"))
+			fname[strlen(fname)-1] = '\0';
+		read_symbols(fname);
+	}
+
+	fclose(in);
+}
+
+#define SZ 500
+
+/* We first write the generated file into memory using the
+ * following helper, then compare to the file on disk and
+ * only update the later if anything changed */
+
+void __attribute__((format(printf, 2, 3))) buf_printf(struct buffer *buf,
+						      const char *fmt, ...)
+{
+	char tmp[SZ];
+	int len;
+	va_list ap;
+
+	va_start(ap, fmt);
+	len = vsnprintf(tmp, SZ, fmt, ap);
+	va_end(ap);
+
+	if (len < 0) {
+		perror("vsnprintf failed");
+		exit(1);
+	}
+	if (len >= SZ)
+		fatal("buf_printf output truncated for string %s: %d bytes needed, %d available\n",
+		      tmp, len + 1, SZ);
+
+	buf_write(buf, tmp, len);
+}
+
+void buf_write(struct buffer *buf, const char *s, int len)
+{
+	if (buf->size - buf->pos < len) {
+		buf->size += len + SZ;
+		buf->p = xrealloc(buf->p, buf->size);
+	}
+	strncpy(buf->p + buf->pos, s, len);
+	buf->pos += len;
+}
+
+/**
+ * verify_module_namespace() - does @modname have access to this symbol's @namespace
+ * @namespace: export symbol namespace
+ * @modname: module name
+ *
+ * If @namespace is prefixed with "module:" to indicate it is a module namespace
+ * then test if @modname matches any of the comma separated patterns.
+ *
+ * The patterns only support tail-glob.
+ */
+static bool verify_module_namespace(const char *namespace, const char *modname)
+{
+	size_t len, modlen = strlen(modname);
+	const char *prefix = "module:";
+	const char *sep;
+	bool glob;
+
+	if (!strstarts(namespace, prefix))
+		return false;
+
+	for (namespace += strlen(prefix); *namespace; namespace = sep) {
+		sep = strchrnul(namespace, ',');
+		len = sep - namespace;
+
+		glob = false;
+		if (sep[-1] == '*') {
+			len--;
+			glob = true;
+		}
+
+		if (*sep)
+			sep++;
+
+		if (strncmp(namespace, modname, len) == 0 && (glob || len == modlen))
+			return true;
+	}
+
+	return false;
+}
+
+static void check_exports(struct module *mod)
+{
+	struct symbol *s, *exp;
+
+	list_for_each_entry(s, &mod->unresolved_symbols, list) {
+		const char *basename;
+		exp = find_symbol(s->name);
+		if (!exp) {
+			if (!s->weak && nr_unresolved++ < MAX_UNRESOLVED_REPORTS)
+				modpost_log(!warn_unresolved, mod,
+					    "symbol '%s' undefined!\n",
+					    s->name);
+			continue;
+		}
+		if (exp->module == mod) {
+			mod_error(mod, "symbol '%s' was exported without definition\n", s->name);
+			continue;
+		}
+
+		exp->used = true;
+		s->module = exp->module;
+		s->crc_valid = exp->crc_valid;
+		s->crc = exp->crc;
+
+		basename = get_basename(mod->name);
+
+		if (!verify_module_namespace(exp->namespace, basename) &&
+		    !contains_namespace(&mod->imported_namespaces, exp->namespace)) {
+			modpost_log(!allow_missing_ns_imports, mod,
+				    "module uses symbol '%s' from namespace '%s', but does not import it.\n",
+				    exp->name, exp->namespace);
+			add_namespace(&mod->missing_namespaces, exp->namespace);
+		}
+
+		if (!mod->is_gpl_compatible && exp->is_gpl_only)
+			mod_error(mod, "GPL-incompatible module uses GPL-only symbol '%s'\n",
+				  exp->name);
+	}
+}
+
+static void handle_white_list_exports(const char *white_list)
+{
+	char *buf, *p, *name;
+
+	buf = read_text_file(white_list);
+	p = buf;
+
+	while ((name = strsep(&p, "\n"))) {
+		struct symbol *sym = find_symbol(name);
+
+		if (sym)
+			sym->used = true;
+	}
+
+	free(buf);
+}
+
+/*
+ * Keep symbols recorded in the .no_trim_symbol section. This is necessary to
+ * prevent CONFIG_TRIM_UNUSED_KSYMS from dropping EXPORT_SYMBOL because
+ * symbol_get() relies on the symbol being present in the ksymtab for lookups.
+ */
+static void keep_no_trim_symbols(struct module *mod)
+{
+	unsigned long size = mod->no_trim_symbol_len;
+
+	for (char *s = mod->no_trim_symbol; s; s = next_string(s , &size)) {
+		struct symbol *sym;
+
+		/*
+		 * If find_symbol() returns NULL, this symbol is not provided
+		 * by any module, and symbol_get() will fail.
+		 */
+		sym = find_symbol(s);
+		if (sym)
+			sym->used = true;
+	}
+}
+
+static void check_modname_len(struct module *mod)
+{
+	const char *mod_name;
+
+	mod_name = get_basename(mod->name);
+
+	if (strlen(mod_name) >= MODULE_NAME_LEN)
+		mod_error(mod, "module name is too long\n");
+}
+
+/**
+ * Header for the generated file
+ **/
+static void add_header(struct buffer *b, struct module *mod)
+{
+	buf_printf(b, "#include <linux/module.h>\n");
+	buf_printf(b, "#include <linux/export-internal.h>\n");
+	buf_printf(b, "#include <linux/compiler.h>\n");
+	buf_printf(b, "\n");
+	buf_printf(b, "MODULE_INFO(name, KBUILD_MODNAME);\n");
+	buf_printf(b, "\n");
+	buf_printf(b, "__visible struct module __this_module\n");
+	buf_printf(b, "__section(\".gnu.linkonce.this_module\") = {\n");
+	buf_printf(b, "\t.name = KBUILD_MODNAME,\n");
+	if (mod->has_init)
+		buf_printf(b, "\t.init = init_module,\n");
+	if (mod->has_cleanup)
+		buf_printf(b, "#ifdef CONFIG_MODULE_UNLOAD\n"
+			      "\t.exit = cleanup_module,\n"
+			      "#endif\n");
+	buf_printf(b, "\t.arch = MODULE_ARCH_INIT,\n");
+	buf_printf(b, "};\n");
+
+	if (!external_module)
+		buf_printf(b, "\nMODULE_INFO(intree, \"Y\");\n");
+
+	if (strstarts(mod->name, "drivers/staging"))
+		buf_printf(b, "\nMODULE_INFO(staging, \"Y\");\n");
+
+	if (strstarts(mod->name, "tools/testing"))
+		buf_printf(b, "\nMODULE_INFO(test, \"Y\");\n");
+}
+
+static void add_exported_symbols(struct buffer *buf, struct module *mod)
+{
+	struct symbol *sym;
+
+	/* generate struct for exported symbols */
+	buf_printf(buf, "\n");
+	list_for_each_entry(sym, &mod->exported_symbols, list) {
+		if (trim_unused_exports && !sym->used)
+			continue;
+
+		buf_printf(buf, "KSYMTAB_%s(%s, \"%s\");\n",
+			   sym->is_func ? "FUNC" : "DATA", sym->name,
+			   sym->namespace);
+
+		buf_printf(buf, "SYMBOL_FLAGS(%s, 0x%02x);\n",
+			   sym->name, get_symbol_flags(sym));
+	}
+
+	if (!modversions)
+		return;
+
+	/* record CRCs for exported symbols */
+	buf_printf(buf, "\n");
+	list_for_each_entry(sym, &mod->exported_symbols, list) {
+		if (trim_unused_exports && !sym->used)
+			continue;
+
+		if (!sym->crc_valid)
+			mod_warn(mod, "EXPORT symbol '%s' version generation failed, symbol will not be versioned.\n"
+				 "Is '%s' prototyped in <asm/asm-prototypes.h>?\n",
+				 sym->name, sym->name);
+
+		buf_printf(buf, "SYMBOL_CRC(%s, 0x%08x);\n",
+			   sym->name, sym->crc);
+	}
+}
+
+/**
+ * Record CRCs for unresolved symbols, supporting long names
+ */
+static void add_extended_versions(struct buffer *b, struct module *mod)
+{
+	struct symbol *s;
+
+	if (!extended_modversions)
+		return;
+
+	buf_printf(b, "\n");
+	buf_printf(b, "static const u32 ____version_ext_crcs[]\n");
+	buf_printf(b, "__used __section(\"__version_ext_crcs\") = {\n");
+	list_for_each_entry(s, &mod->unresolved_symbols, list) {
+		if (!s->module)
+			continue;
+		if (!s->crc_valid) {
+			mod_warn(mod, "symbol '%s' has no CRC!\n", s->name);
+			continue;
+		}
+		buf_printf(b, "\t0x%08x,\n", s->crc);
+	}
+	buf_printf(b, "};\n");
+
+	buf_printf(b, "static const char ____version_ext_names[]\n");
+	buf_printf(b, "__used __section(\"__version_ext_names\") =\n");
+	list_for_each_entry(s, &mod->unresolved_symbols, list) {
+		if (!s->module)
+			continue;
+		if (!s->crc_valid)
+			/*
+			 * We already warned on this when producing the crc
+			 * table.
+			 * We need to skip its name too, as the indexes in
+			 * both tables need to align.
+			 */
+			continue;
+		buf_printf(b, "\t\"%s\\0\"\n", s->name);
+	}
+	buf_printf(b, ";\n");
+}
+
+/**
+ * Record CRCs for unresolved symbols
+ **/
+static void add_versions(struct buffer *b, struct module *mod)
+{
+	struct symbol *s;
+
+	if (!basic_modversions)
+		return;
+
+	buf_printf(b, "\n");
+	buf_printf(b, "static const struct modversion_info ____versions[]\n");
+	buf_printf(b, "__used __section(\"__versions\") = {\n");
+
+	list_for_each_entry(s, &mod->unresolved_symbols, list) {
+		if (!s->module)
+			continue;
+		if (!s->crc_valid) {
+			mod_warn(mod, "symbol '%s' has no CRC!\n", s->name);
+			continue;
+		}
+		if (strlen(s->name) >= MODULE_NAME_LEN) {
+			if (extended_modversions) {
+				/* this symbol will only be in the extended info */
+				continue;
+			} else {
+				mod_error(mod, "too long symbol '%s'\n", s->name);
+				break;
+			}
+		}
+		buf_printf(b, "\t{ 0x%08x, \"%s\" },\n",
+			   s->crc, s->name);
+	}
+
+	buf_printf(b, "};\n");
+}
+
+static void add_depends(struct buffer *b, struct module *mod)
+{
+	struct symbol *s;
+	int first = 1;
+
+	/* Clear ->seen flag of modules that own symbols needed by this. */
+	list_for_each_entry(s, &mod->unresolved_symbols, list) {
+		if (s->module)
+			s->module->seen = s->module->is_vmlinux;
+	}
+
+	buf_printf(b, "\n");
+	buf_printf(b, "MODULE_INFO(depends, \"");
+	list_for_each_entry(s, &mod->unresolved_symbols, list) {
+		const char *p;
+		if (!s->module)
+			continue;
+
+		if (s->module->seen)
+			continue;
+
+		s->module->seen = true;
+		p = get_basename(s->module->name);
+		buf_printf(b, "%s%s", first ? "" : ",", p);
+		first = 0;
+	}
+	buf_printf(b, "\");\n");
+}
+
+static void add_srcversion(struct buffer *b, struct module *mod)
+{
+	if (mod->srcversion[0]) {
+		buf_printf(b, "\n");
+		buf_printf(b, "MODULE_INFO(srcversion, \"%s\");\n",
+			   mod->srcversion);
+	}
+}
+
+static void write_buf(struct buffer *b, const char *fname)
+{
+	FILE *file;
+
+	if (error_occurred)
+		return;
+
+	file = fopen(fname, "w");
+	if (!file) {
+		perror(fname);
+		exit(1);
+	}
+	if (fwrite(b->p, 1, b->pos, file) != b->pos) {
+		perror(fname);
+		exit(1);
+	}
+	if (fclose(file) != 0) {
+		perror(fname);
+		exit(1);
+	}
+}
+
+static void write_if_changed(struct buffer *b, const char *fname)
+{
+	char *tmp;
+	FILE *file;
+	struct stat st;
+
+	file = fopen(fname, "r");
+	if (!file)
+		goto write;
+
+	if (fstat(fileno(file), &st) < 0)
+		goto close_write;
+
+	if (st.st_size != b->pos)
+		goto close_write;
+
+	tmp = xmalloc(b->pos);
+	if (fread(tmp, 1, b->pos, file) != b->pos)
+		goto free_write;
+
+	if (memcmp(tmp, b->p, b->pos) != 0)
+		goto free_write;
+
+	free(tmp);
+	fclose(file);
+	return;
+
+ free_write:
+	free(tmp);
+ close_write:
+	fclose(file);
+ write:
+	write_buf(b, fname);
+}
+
+static void write_vmlinux_export_c_file(struct module *mod)
+{
+	struct buffer buf = { };
+	struct module_alias *alias, *next;
+
+	buf_printf(&buf,
+		   "#include <linux/export-internal.h>\n");
+
+	add_exported_symbols(&buf, mod);
+
+	buf_printf(&buf,
+		   "#include <linux/module.h>\n"
+		   "#undef __MODULE_INFO_PREFIX\n"
+		   "#define __MODULE_INFO_PREFIX\n");
+
+	list_for_each_entry_safe(alias, next, &mod->aliases, node) {
+		buf_printf(&buf, "MODULE_INFO(%s.alias, \"%s\");\n",
+			   alias->builtin_modname, alias->str);
+		list_del(&alias->node);
+		free(alias->builtin_modname);
+		free(alias);
+	}
+
+	write_if_changed(&buf, ".vmlinux.export.c");
+	free(buf.p);
+}
+
+/* do sanity checks, and generate *.mod.c file */
+static void write_mod_c_file(struct module *mod)
+{
+	struct buffer buf = { };
+	struct module_alias *alias, *next;
+	char fname[PATH_MAX];
+	int ret;
+
+	add_header(&buf, mod);
+	add_exported_symbols(&buf, mod);
+	add_versions(&buf, mod);
+	add_extended_versions(&buf, mod);
+	add_depends(&buf, mod);
+
+	buf_printf(&buf, "\n");
+	list_for_each_entry_safe(alias, next, &mod->aliases, node) {
+		buf_printf(&buf, "MODULE_ALIAS(\"%s\");\n", alias->str);
+		list_del(&alias->node);
+		free(alias);
+	}
+
+	add_srcversion(&buf, mod);
+
+	ret = snprintf(fname, sizeof(fname), "%s.mod.c", mod->name);
+	if (ret >= sizeof(fname)) {
+		error("%s: too long path was truncated\n", fname);
+		goto free;
+	}
+
+	write_if_changed(&buf, fname);
+
+free:
+	free(buf.p);
+}
+
+/* parse Module.symvers file. line format:
+ * 0x12345678<tab>symbol<tab>module<tab>export<tab>namespace
+ **/
+static void read_dump(const char *fname)
+{
+	char *buf, *pos, *line;
+
+	buf = read_text_file(fname);
+	if (!buf)
+		/* No symbol versions, silently ignore */
+		return;
+
+	pos = buf;
+
+	while ((line = get_line(&pos))) {
+		char *symname, *namespace, *modname, *d, *export;
+		unsigned int crc;
+		struct module *mod;
+		struct symbol *s;
+		bool gpl_only;
+
+		if (!(symname = strchr(line, '\t')))
+			goto fail;
+		*symname++ = '\0';
+		if (!(modname = strchr(symname, '\t')))
+			goto fail;
+		*modname++ = '\0';
+		if (!(export = strchr(modname, '\t')))
+			goto fail;
+		*export++ = '\0';
+		if (!(namespace = strchr(export, '\t')))
+			goto fail;
+		*namespace++ = '\0';
+
+		crc = strtoul(line, &d, 16);
+		if (*symname == '\0' || *modname == '\0' || *d != '\0')
+			goto fail;
+
+		if (!strcmp(export, "EXPORT_SYMBOL_GPL")) {
+			gpl_only = true;
+		} else if (!strcmp(export, "EXPORT_SYMBOL")) {
+			gpl_only = false;
+		} else {
+			error("%s: unknown license %s. skip", symname, export);
+			continue;
+		}
+
+		mod = find_module(fname, modname);
+		if (!mod) {
+			mod = new_module(modname, strlen(modname));
+			mod->dump_file = fname;
+		}
+		s = sym_add_exported(symname, mod, gpl_only, namespace);
+		sym_set_crc(s, crc);
+	}
+	free(buf);
+	return;
+fail:
+	free(buf);
+	fatal("parse error in symbol dump file\n");
+}
+
+static void write_dump(const char *fname)
+{
+	struct buffer buf = { };
+	struct module *mod;
+	struct symbol *sym;
+
+	list_for_each_entry(mod, &modules, list) {
+		if (mod->dump_file)
+			continue;
+		list_for_each_entry(sym, &mod->exported_symbols, list) {
+			if (trim_unused_exports && !sym->used)
+				continue;
+
+			buf_printf(&buf, "0x%08x\t%s\t%s\tEXPORT_SYMBOL%s\t%s\n",
+				   sym->crc, sym->name, mod->name,
+				   sym->is_gpl_only ? "_GPL" : "",
+				   sym->namespace);
+		}
+	}
+	write_buf(&buf, fname);
+	free(buf.p);
+}
+
+static void write_namespace_deps_files(const char *fname)
+{
+	struct module *mod;
+	struct namespace_list *ns;
+	struct buffer ns_deps_buf = {};
+
+	list_for_each_entry(mod, &modules, list) {
+
+		if (mod->dump_file || list_empty(&mod->missing_namespaces))
+			continue;
+
+		buf_printf(&ns_deps_buf, "%s.ko:", mod->name);
+
+		list_for_each_entry(ns, &mod->missing_namespaces, list)
+			buf_printf(&ns_deps_buf, " %s", ns->namespace);
+
+		buf_printf(&ns_deps_buf, "\n");
+	}
+
+	write_if_changed(&ns_deps_buf, fname);
+	free(ns_deps_buf.p);
+}
+
+struct dump_list {
+	struct list_head list;
+	const char *file;
+};
+
+static void check_host_endian(void)
+{
+	static const union {
+		short s;
+		char c[2];
+	} endian_test = { .c = {0x01, 0x02} };
+
+	switch (endian_test.s) {
+	case 0x0102:
+		host_is_big_endian = true;
+		break;
+	case 0x0201:
+		host_is_big_endian = false;
+		break;
+	default:
+		fatal("Unknown host endian\n");
+	}
+}
+
+int main(int argc, char **argv)
+{
+	struct module *mod;
+	char *missing_namespace_deps = NULL;
+	char *unused_exports_white_list = NULL;
+	char *dump_write = NULL, *files_source = NULL;
+	int opt;
+	LIST_HEAD(dump_lists);
+	struct dump_list *dl, *dl2;
+
+	while ((opt = getopt(argc, argv, "ei:MmnT:to:au:WwENd:xb")) != -1) {
+		switch (opt) {
+		case 'e':
+			external_module = true;
+			break;
+		case 'i':
+			dl = xmalloc(sizeof(*dl));
+			dl->file = optarg;
+			list_add_tail(&dl->list, &dump_lists);
+			break;
+		case 'M':
+			module_enabled = true;
+			break;
+		case 'm':
+			modversions = true;
+			break;
+		case 'n':
+			ignore_missing_files = true;
+			break;
+		case 'o':
+			dump_write = optarg;
+			break;
+		case 'a':
+			all_versions = true;
+			break;
+		case 'T':
+			files_source = optarg;
+			break;
+		case 't':
+			trim_unused_exports = true;
+			break;
+		case 'u':
+			unused_exports_white_list = optarg;
+			break;
+		case 'W':
+			extra_warn = true;
+			break;
+		case 'w':
+			warn_unresolved = true;
+			break;
+		case 'E':
+			sec_mismatch_warn_only = false;
+			break;
+		case 'N':
+			allow_missing_ns_imports = true;
+			break;
+		case 'd':
+			missing_namespace_deps = optarg;
+			break;
+		case 'b':
+			basic_modversions = true;
+			break;
+		case 'x':
+			extended_modversions = true;
+			break;
+		default:
+			exit(1);
+		}
+	}
+
+	check_host_endian();
+
+	list_for_each_entry_safe(dl, dl2, &dump_lists, list) {
+		read_dump(dl->file);
+		list_del(&dl->list);
+		free(dl);
+	}
+
+	while (optind < argc)
+		read_symbols(argv[optind++]);
+
+	if (files_source)
+		read_symbols_from_files(files_source);
+
+	list_for_each_entry(mod, &modules, list) {
+		keep_no_trim_symbols(mod);
+
+		if (mod->dump_file || mod->is_vmlinux)
+			continue;
+
+		check_modname_len(mod);
+		check_exports(mod);
+	}
+
+	if (unused_exports_white_list)
+		handle_white_list_exports(unused_exports_white_list);
+
+	list_for_each_entry(mod, &modules, list) {
+		if (mod->dump_file)
+			continue;
+
+		if (mod->is_vmlinux)
+			write_vmlinux_export_c_file(mod);
+		else
+			write_mod_c_file(mod);
+	}
+
+	if (missing_namespace_deps)
+		write_namespace_deps_files(missing_namespace_deps);
+
+	if (dump_write)
+		write_dump(dump_write);
+	if (sec_mismatch_count && !sec_mismatch_warn_only)
+		error("Section mismatches detected.\n"
+		      "Set CONFIG_SECTION_MISMATCH_WARN_ONLY=y to allow them.\n");
+
+	if (nr_unresolved > MAX_UNRESOLVED_REPORTS)
+		warn("suppressed %u unresolved symbol warnings because there were too many)\n",
+		     nr_unresolved - MAX_UNRESOLVED_REPORTS);
+
+	return error_occurred ? 1 : 0;
+}
diff --git a/scripts/mod/modpost.h b/scripts/mod/modpost.h
new file mode 100644
index 000000000..d5f6d8283
--- /dev/null
+++ b/scripts/mod/modpost.h
@@ -0,0 +1,244 @@
+/* SPDX-License-Identifier: GPL-2.0 */
+#include <byteswap.h>
+#include <stdbool.h>
+#include <stdio.h>
+#include <stdlib.h>
+#include <stdarg.h>
+#include <string.h>
+#include <sys/types.h>
+#include <sys/stat.h>
+#include <sys/mman.h>
+#include <fcntl.h>
+#include <unistd.h>
+#include <elf.h>
+#include "../../include/linux/module_symbol.h"
+
+#include <list_types.h>
+#include "elfconfig.h"
+
+/* On BSD-alike OSes elf.h defines these according to host's word size */
+#undef ELF_ST_BIND
+#undef ELF_ST_TYPE
+#undef ELF_R_SYM
+#undef ELF_R_TYPE
+
+#if KERNEL_ELFCLASS == ELFCLASS32
+
+#define Elf_Ehdr    Elf32_Ehdr
+#define Elf_Shdr    Elf32_Shdr
+#define Elf_Sym     Elf32_Sym
+#define Elf_Addr    Elf32_Addr
+#define Elf_Section Elf32_Half
+#define ELF_ST_BIND ELF32_ST_BIND
+#define ELF_ST_TYPE ELF32_ST_TYPE
+
+#define Elf_Rel     Elf32_Rel
+#define Elf_Rela    Elf32_Rela
+#define ELF_R_SYM   ELF32_R_SYM
+#define ELF_R_TYPE  ELF32_R_TYPE
+#else
+
+#define Elf_Ehdr    Elf64_Ehdr
+#define Elf_Shdr    Elf64_Shdr
+#define Elf_Sym     Elf64_Sym
+#define Elf_Addr    Elf64_Addr
+#define Elf_Section Elf64_Half
+#define ELF_ST_BIND ELF64_ST_BIND
+#define ELF_ST_TYPE ELF64_ST_TYPE
+
+#define Elf_Rel     Elf64_Rel
+#define Elf_Rela    Elf64_Rela
+#define ELF_R_SYM   ELF64_R_SYM
+#define ELF_R_TYPE  ELF64_R_TYPE
+#endif
+
+#define bswap(x) \
+({ \
+	_Static_assert(sizeof(x) == 1 || sizeof(x) == 2 || \
+		       sizeof(x) == 4 || sizeof(x) == 8, "bug"); \
+	(typeof(x))(sizeof(x) == 2 ? bswap_16(x) : \
+		    sizeof(x) == 4 ? bswap_32(x) : \
+		    sizeof(x) == 8 ? bswap_64(x) : \
+		    x); \
+})
+
+#define TO_NATIVE(x)	\
+	(target_is_big_endian == host_is_big_endian ? x : bswap(x))
+
+#define __get_unaligned_t(type, ptr) ({					\
+	const struct { type x; } __attribute__((__packed__)) *__pptr =	\
+						(typeof(__pptr))(ptr);	\
+	__pptr->x;							\
+})
+
+#define get_unaligned(ptr)	__get_unaligned_t(typeof(*(ptr)), (ptr))
+
+#define get_unaligned_native(ptr) \
+({ \
+	typeof(*(ptr)) _val = get_unaligned(ptr); \
+	TO_NATIVE(_val); \
+})
+
+#define ARRAY_SIZE(arr) (sizeof(arr) / sizeof((arr)[0]))
+
+#define strstarts(str, prefix) (strncmp(str, prefix, strlen(prefix)) == 0)
+
+struct buffer {
+	char *p;
+	int pos;
+	int size;
+};
+
+void __attribute__((format(printf, 2, 3)))
+buf_printf(struct buffer *buf, const char *fmt, ...);
+
+void
+buf_write(struct buffer *buf, const char *s, int len);
+
+/**
+ * struct module_alias - auto-generated MODULE_ALIAS()
+ *
+ * @node: linked to module::aliases
+ * @modname: name of the builtin module (only for vmlinux)
+ * @str: a string for MODULE_ALIAS()
+ */
+struct module_alias {
+	struct list_head node;
+	char *builtin_modname;
+	char str[];
+};
+
+/**
+ * struct module - represent a module (vmlinux or *.ko)
+ *
+ * @dump_file: path to the .symvers file if loaded from a file
+ * @aliases: list head for module_aliases
+ * @no_trim_symbol: .no_trim_symbol section data
+ * @no_trim_symbol_len: length of the .no_trim_symbol section
+ */
+struct module {
+	struct list_head list;
+	struct list_head exported_symbols;
+	struct list_head unresolved_symbols;
+	const char *dump_file;
+	bool is_gpl_compatible;
+	bool is_vmlinux;
+	bool seen;
+	bool has_init;
+	bool has_cleanup;
+	char	     srcversion[25];
+	// Missing namespace dependencies
+	struct list_head missing_namespaces;
+	// Actual imported namespaces
+	struct list_head imported_namespaces;
+	struct list_head aliases;
+	char *no_trim_symbol;
+	unsigned int no_trim_symbol_len;
+	char name[];
+};
+
+struct elf_info {
+	size_t size;
+	Elf_Ehdr     *hdr;
+	Elf_Shdr     *sechdrs;
+	Elf_Sym      *symtab_start;
+	Elf_Sym      *symtab_stop;
+	unsigned int export_symbol_secndx;	/* .export_symbol section */
+	char         *strtab;
+	char	     *modinfo;
+	unsigned int modinfo_len;
+	char         *no_trim_symbol;
+	unsigned int no_trim_symbol_len;
+
+	/* support for 32bit section numbers */
+
+	unsigned int num_sections; /* max_secindex + 1 */
+	unsigned int secindex_strings;
+	/* if Nth symbol table entry has .st_shndx = SHN_XINDEX,
+	 * take shndx from symtab_shndx_start[N] instead */
+	Elf32_Word   *symtab_shndx_start;
+	Elf32_Word   *symtab_shndx_stop;
+
+	struct symsearch *symsearch;
+};
+
+/* Accessor for sym->st_shndx, hides ugliness of "64k sections" */
+static inline unsigned int get_secindex(const struct elf_info *info,
+					const Elf_Sym *sym)
+{
+	unsigned int index = sym->st_shndx;
+
+	/*
+	 * Elf{32,64}_Sym::st_shndx is 2 byte. Big section numbers are available
+	 * in the .symtab_shndx section.
+	 */
+	if (index == SHN_XINDEX)
+		return info->symtab_shndx_start[sym - info->symtab_start];
+
+	/*
+	 * Move reserved section indices SHN_LORESERVE..SHN_HIRESERVE out of
+	 * the way to UINT_MAX-255..UINT_MAX, to avoid conflicting with real
+	 * section indices.
+	 */
+	if (index >= SHN_LORESERVE && index <= SHN_HIRESERVE)
+		return index - SHN_HIRESERVE - 1;
+
+	return index;
+}
+
+/*
+ * If there's no name there, ignore it; likewise, ignore it if it's
+ * one of the magic symbols emitted used by current tools.
+ *
+ * Internal symbols created by tools should be ignored by modpost.
+ */
+static inline bool is_valid_name(struct elf_info *elf, Elf_Sym *sym)
+{
+	const char *name = elf->strtab + sym->st_name;
+
+	if (!name || !strlen(name))
+		return false;
+	return !is_mapping_symbol(name);
+}
+
+/* symsearch.c */
+void symsearch_init(struct elf_info *elf);
+void symsearch_finish(struct elf_info *elf);
+Elf_Sym *symsearch_find_nearest(struct elf_info *elf, Elf_Addr addr,
+				unsigned int secndx, bool allow_negative,
+				Elf_Addr min_distance);
+
+/* file2alias.c */
+void handle_moddevtable(struct module *mod, struct elf_info *info,
+			Elf_Sym *sym, const char *symname);
+
+/* sumversion.c */
+void get_src_version(const char *modname, char sum[], unsigned sumlen);
+
+/* from modpost.c */
+extern bool target_is_big_endian;
+extern bool host_is_big_endian;
+const char *get_basename(const char *path);
+char *read_text_file(const char *filename);
+char *get_line(char **stringp);
+void *sym_get_data(const struct elf_info *info, const Elf_Sym *sym);
+
+void __attribute__((format(printf, 3, 4)))
+modpost_log(bool is_error, struct module *mod, const char *fmt, ...);
+
+/*
+ * warn - show the given message, then let modpost continue running, still
+ *        allowing modpost to exit successfully. This should be used when
+ *        we still allow to generate vmlinux and modules.
+ *
+ * error - show the given message, then let modpost continue running, but fail
+ *         in the end. This should be used when we should stop building vmlinux
+ *         or modules, but we can continue running modpost to catch as many
+ *         issues as possible.
+ *
+ * fatal - show the given message, and bail out immediately. This should be
+ *         used when there is no point to continue running modpost.
+ */
+#define warn(fmt, args...)	modpost_log(false, NULL, fmt, ##args)
+#define error(fmt, args...)	modpost_log(true, NULL, fmt, ##args)
+#define fatal(fmt, args...)	do { error(fmt, ##args); exit(1); } while (1)
diff --git a/scripts/mod/sumversion.c b/scripts/mod/sumversion.c
new file mode 100644
index 000000000..3dd28b4d0
--- /dev/null
+++ b/scripts/mod/sumversion.c
@@ -0,0 +1,413 @@
+#include <netinet/in.h>
+#ifdef __sun__
+#include <inttypes.h>
+#else
+#include <stdint.h>
+#endif
+#include <ctype.h>
+#include <errno.h>
+#include <string.h>
+#include <limits.h>
+
+#include <xalloc.h>
+#include "modpost.h"
+
+/*
+ * Stolen form Cryptographic API.
+ *
+ * MD4 Message Digest Algorithm (RFC1320).
+ *
+ * Implementation derived from Andrew Tridgell and Steve French's
+ * CIFS MD4 implementation, and the cryptoapi implementation
+ * originally based on the public domain implementation written
+ * by Colin Plumb in 1993.
+ *
+ * Copyright (c) Andrew Tridgell 1997-1998.
+ * Modified by Steve French (sfrench@us.ibm.com) 2002
+ * Copyright (c) Cryptoapi developers.
+ * Copyright (c) 2002 David S. Miller (davem@redhat.com)
+ * Copyright (c) 2002 James Morris <jmorris@intercode.com.au>
+ *
+ * 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.
+ *
+ */
+#define MD4_DIGEST_SIZE		16
+#define MD4_HMAC_BLOCK_SIZE	64
+#define MD4_BLOCK_WORDS		16
+#define MD4_HASH_WORDS		4
+
+struct md4_ctx {
+	uint32_t hash[MD4_HASH_WORDS];
+	uint32_t block[MD4_BLOCK_WORDS];
+	uint64_t byte_count;
+};
+
+static inline uint32_t lshift(uint32_t x, unsigned int s)
+{
+	x &= 0xFFFFFFFF;
+	return ((x << s) & 0xFFFFFFFF) | (x >> (32 - s));
+}
+
+static inline uint32_t F(uint32_t x, uint32_t y, uint32_t z)
+{
+	return (x & y) | ((~x) & z);
+}
+
+static inline uint32_t G(uint32_t x, uint32_t y, uint32_t z)
+{
+	return (x & y) | (x & z) | (y & z);
+}
+
+static inline uint32_t H(uint32_t x, uint32_t y, uint32_t z)
+{
+	return x ^ y ^ z;
+}
+
+#define ROUND1(a,b,c,d,k,s) (a = lshift(a + F(b,c,d) + k, s))
+#define ROUND2(a,b,c,d,k,s) (a = lshift(a + G(b,c,d) + k + (uint32_t)0x5A827999,s))
+#define ROUND3(a,b,c,d,k,s) (a = lshift(a + H(b,c,d) + k + (uint32_t)0x6ED9EBA1,s))
+
+/* XXX: this stuff can be optimized */
+static inline void le32_to_cpu_array(uint32_t *buf, unsigned int words)
+{
+	while (words--) {
+		*buf = ntohl(*buf);
+		buf++;
+	}
+}
+
+static inline void cpu_to_le32_array(uint32_t *buf, unsigned int words)
+{
+	while (words--) {
+		*buf = htonl(*buf);
+		buf++;
+	}
+}
+
+static void md4_transform(uint32_t *hash, uint32_t const *in)
+{
+	uint32_t a, b, c, d;
+
+	a = hash[0];
+	b = hash[1];
+	c = hash[2];
+	d = hash[3];
+
+	ROUND1(a, b, c, d, in[0], 3);
+	ROUND1(d, a, b, c, in[1], 7);
+	ROUND1(c, d, a, b, in[2], 11);
+	ROUND1(b, c, d, a, in[3], 19);
+	ROUND1(a, b, c, d, in[4], 3);
+	ROUND1(d, a, b, c, in[5], 7);
+	ROUND1(c, d, a, b, in[6], 11);
+	ROUND1(b, c, d, a, in[7], 19);
+	ROUND1(a, b, c, d, in[8], 3);
+	ROUND1(d, a, b, c, in[9], 7);
+	ROUND1(c, d, a, b, in[10], 11);
+	ROUND1(b, c, d, a, in[11], 19);
+	ROUND1(a, b, c, d, in[12], 3);
+	ROUND1(d, a, b, c, in[13], 7);
+	ROUND1(c, d, a, b, in[14], 11);
+	ROUND1(b, c, d, a, in[15], 19);
+
+	ROUND2(a, b, c, d,in[ 0], 3);
+	ROUND2(d, a, b, c, in[4], 5);
+	ROUND2(c, d, a, b, in[8], 9);
+	ROUND2(b, c, d, a, in[12], 13);
+	ROUND2(a, b, c, d, in[1], 3);
+	ROUND2(d, a, b, c, in[5], 5);
+	ROUND2(c, d, a, b, in[9], 9);
+	ROUND2(b, c, d, a, in[13], 13);
+	ROUND2(a, b, c, d, in[2], 3);
+	ROUND2(d, a, b, c, in[6], 5);
+	ROUND2(c, d, a, b, in[10], 9);
+	ROUND2(b, c, d, a, in[14], 13);
+	ROUND2(a, b, c, d, in[3], 3);
+	ROUND2(d, a, b, c, in[7], 5);
+	ROUND2(c, d, a, b, in[11], 9);
+	ROUND2(b, c, d, a, in[15], 13);
+
+	ROUND3(a, b, c, d,in[ 0], 3);
+	ROUND3(d, a, b, c, in[8], 9);
+	ROUND3(c, d, a, b, in[4], 11);
+	ROUND3(b, c, d, a, in[12], 15);
+	ROUND3(a, b, c, d, in[2], 3);
+	ROUND3(d, a, b, c, in[10], 9);
+	ROUND3(c, d, a, b, in[6], 11);
+	ROUND3(b, c, d, a, in[14], 15);
+	ROUND3(a, b, c, d, in[1], 3);
+	ROUND3(d, a, b, c, in[9], 9);
+	ROUND3(c, d, a, b, in[5], 11);
+	ROUND3(b, c, d, a, in[13], 15);
+	ROUND3(a, b, c, d, in[3], 3);
+	ROUND3(d, a, b, c, in[11], 9);
+	ROUND3(c, d, a, b, in[7], 11);
+	ROUND3(b, c, d, a, in[15], 15);
+
+	hash[0] += a;
+	hash[1] += b;
+	hash[2] += c;
+	hash[3] += d;
+}
+
+static inline void md4_transform_helper(struct md4_ctx *ctx)
+{
+	le32_to_cpu_array(ctx->block, ARRAY_SIZE(ctx->block));
+	md4_transform(ctx->hash, ctx->block);
+}
+
+static void md4_init(struct md4_ctx *mctx)
+{
+	mctx->hash[0] = 0x67452301;
+	mctx->hash[1] = 0xefcdab89;
+	mctx->hash[2] = 0x98badcfe;
+	mctx->hash[3] = 0x10325476;
+	mctx->byte_count = 0;
+}
+
+static void md4_update(struct md4_ctx *mctx,
+		       const unsigned char *data, unsigned int len)
+{
+	const uint32_t avail = sizeof(mctx->block) - (mctx->byte_count & 0x3f);
+
+	mctx->byte_count += len;
+
+	if (avail > len) {
+		memcpy((char *)mctx->block + (sizeof(mctx->block) - avail),
+		       data, len);
+		return;
+	}
+
+	memcpy((char *)mctx->block + (sizeof(mctx->block) - avail),
+	       data, avail);
+
+	md4_transform_helper(mctx);
+	data += avail;
+	len -= avail;
+
+	while (len >= sizeof(mctx->block)) {
+		memcpy(mctx->block, data, sizeof(mctx->block));
+		md4_transform_helper(mctx);
+		data += sizeof(mctx->block);
+		len -= sizeof(mctx->block);
+	}
+
+	memcpy(mctx->block, data, len);
+}
+
+static void md4_final_ascii(struct md4_ctx *mctx, char *out, unsigned int len)
+{
+	const unsigned int offset = mctx->byte_count & 0x3f;
+	char *p = (char *)mctx->block + offset;
+	int padding = 56 - (offset + 1);
+
+	*p++ = 0x80;
+	if (padding < 0) {
+		memset(p, 0x00, padding + sizeof (uint64_t));
+		md4_transform_helper(mctx);
+		p = (char *)mctx->block;
+		padding = 56;
+	}
+
+	memset(p, 0, padding);
+	mctx->block[14] = mctx->byte_count << 3;
+	mctx->block[15] = mctx->byte_count >> 29;
+	le32_to_cpu_array(mctx->block, (sizeof(mctx->block) -
+			  sizeof(uint64_t)) / sizeof(uint32_t));
+	md4_transform(mctx->hash, mctx->block);
+	cpu_to_le32_array(mctx->hash, ARRAY_SIZE(mctx->hash));
+
+	snprintf(out, len, "%08X%08X%08X%08X",
+		 mctx->hash[0], mctx->hash[1], mctx->hash[2], mctx->hash[3]);
+}
+
+static inline void add_char(unsigned char c, struct md4_ctx *md)
+{
+	md4_update(md, &c, 1);
+}
+
+static int parse_string(const char *file, unsigned long len,
+			struct md4_ctx *md)
+{
+	unsigned long i;
+
+	add_char(file[0], md);
+	for (i = 1; i < len; i++) {
+		add_char(file[i], md);
+		if (file[i] == '"' && file[i-1] != '\\')
+			break;
+	}
+	return i;
+}
+
+static int parse_comment(const char *file, unsigned long len)
+{
+	unsigned long i;
+
+	for (i = 2; i < len; i++) {
+		if (file[i-1] == '*' && file[i] == '/')
+			break;
+	}
+	return i;
+}
+
+/* FIXME: Handle .s files differently (eg. # starts comments) --RR */
+static int parse_file(const char *fname, struct md4_ctx *md)
+{
+	char *file;
+	unsigned long i, len;
+
+	file = read_text_file(fname);
+	len = strlen(file);
+
+	for (i = 0; i < len; i++) {
+		/* Collapse and ignore \ and CR. */
+		if (file[i] == '\\' && (i+1 < len) && file[i+1] == '\n') {
+			i++;
+			continue;
+		}
+
+		/* Ignore whitespace */
+		if (isspace(file[i]))
+			continue;
+
+		/* Handle strings as whole units */
+		if (file[i] == '"') {
+			i += parse_string(file+i, len - i, md);
+			continue;
+		}
+
+		/* Comments: ignore */
+		if (file[i] == '/' && file[i+1] == '*') {
+			i += parse_comment(file+i, len - i);
+			continue;
+		}
+
+		add_char(file[i], md);
+	}
+	free(file);
+	return 1;
+}
+/* Check whether the file is a static library or not */
+static bool is_static_library(const char *objfile)
+{
+	int len = strlen(objfile);
+
+	return objfile[len - 2] == '.' && objfile[len - 1] == 'a';
+}
+
+/* We have dir/file.o.  Open dir/.file.o.cmd, look for source_ and deps_ line
+ * to figure out source files. */
+static int parse_source_files(const char *objfile, struct md4_ctx *md)
+{
+	char *cmd, *file, *line, *dir, *pos;
+	const char *base;
+	int dirlen, ret = 0, check_files = 0;
+
+	cmd = xmalloc(strlen(objfile) + sizeof("..cmd"));
+
+	base = get_basename(objfile);
+	dirlen = base - objfile;
+	sprintf(cmd, "%.*s.%s.cmd", dirlen, objfile, base);
+
+	dir = xmalloc(dirlen + 1);
+	strncpy(dir, objfile, dirlen);
+	dir[dirlen] = '\0';
+
+	file = read_text_file(cmd);
+
+	pos = file;
+
+	/* Sum all files in the same dir or subdirs. */
+	while ((line = get_line(&pos))) {
+		char* p;
+
+		/* trim the leading spaces away */
+		while (isspace(*line))
+			line++;
+		p = line;
+
+		if (strstarts(line, "source_")) {
+			p = strrchr(line, ' ');
+			if (!p) {
+				warn("malformed line: %s\n", line);
+				goto out_file;
+			}
+			p++;
+			if (!parse_file(p, md)) {
+				warn("could not open %s: %s\n",
+				     p, strerror(errno));
+				goto out_file;
+			}
+			continue;
+		}
+		if (strstarts(line, "deps_")) {
+			check_files = 1;
+			continue;
+		}
+		if (!check_files)
+			continue;
+
+		/* Continue until line does not end with '\' */
+		if ( *(p + strlen(p)-1) != '\\')
+			break;
+		/* Terminate line at first space, to get rid of final ' \' */
+		while (*p) {
+			if (isspace(*p)) {
+				*p = '\0';
+				break;
+			}
+			p++;
+		}
+
+		/* Check if this file is in same dir as objfile */
+		if ((strstr(line, dir)+strlen(dir)-1) == strrchr(line, '/')) {
+			if (!parse_file(line, md)) {
+				warn("could not open %s: %s\n",
+				     line, strerror(errno));
+				goto out_file;
+			}
+
+		}
+
+	}
+
+	/* Everyone parsed OK */
+	ret = 1;
+out_file:
+	free(file);
+	free(dir);
+	free(cmd);
+	return ret;
+}
+
+/* Calc and record src checksum. */
+void get_src_version(const char *modname, char sum[], unsigned sumlen)
+{
+	char *buf, *pos;
+	struct md4_ctx md;
+	char *fname;
+	char filelist[PATH_MAX + 1];
+
+	/* objects for a module are listed in the first line of *.mod file. */
+	snprintf(filelist, sizeof(filelist), "%s.mod", modname);
+
+	buf = read_text_file(filelist);
+	pos = buf;
+
+	md4_init(&md);
+	while ((fname = strsep(&pos, "\n"))) {
+		if (!*fname)
+			continue;
+		if (!(is_static_library(fname)) &&
+				!parse_source_files(fname, &md))
+			goto free;
+	}
+
+	md4_final_ascii(&md, sum, sumlen);
+free:
+	free(buf);
+}
diff --git a/scripts/mod/symsearch.c b/scripts/mod/symsearch.c
new file mode 100644
index 000000000..b9737b92f
--- /dev/null
+++ b/scripts/mod/symsearch.c
@@ -0,0 +1,199 @@
+// SPDX-License-Identifier: GPL-2.0
+
+/*
+ * Helper functions for finding the symbol in an ELF which is "nearest"
+ * to a given address.
+ */
+#include <xalloc.h>
+#include "modpost.h"
+
+struct syminfo {
+	unsigned int symbol_index;
+	unsigned int section_index;
+	Elf_Addr addr;
+};
+
+/*
+ * Container used to hold an entire binary search table.
+ * Entries in table are ascending, sorted first by section_index,
+ * then by addr, and last by symbol_index.  The sorting by
+ * symbol_index is used to ensure predictable behavior when
+ * multiple symbols are present with the same address; all
+ * symbols past the first are effectively ignored, by eliding
+ * them in symsearch_fixup().
+ */
+struct symsearch {
+	unsigned int table_size;
+	struct syminfo table[];
+};
+
+static int syminfo_compare(const void *s1, const void *s2)
+{
+	const struct syminfo *sym1 = s1;
+	const struct syminfo *sym2 = s2;
+
+	if (sym1->section_index > sym2->section_index)
+		return 1;
+	if (sym1->section_index < sym2->section_index)
+		return -1;
+	if (sym1->addr > sym2->addr)
+		return 1;
+	if (sym1->addr < sym2->addr)
+		return -1;
+	if (sym1->symbol_index > sym2->symbol_index)
+		return 1;
+	if (sym1->symbol_index < sym2->symbol_index)
+		return -1;
+	return 0;
+}
+
+static unsigned int symbol_count(struct elf_info *elf)
+{
+	unsigned int result = 0;
+
+	for (Elf_Sym *sym = elf->symtab_start; sym < elf->symtab_stop; sym++) {
+		if (is_valid_name(elf, sym))
+			result++;
+	}
+	return result;
+}
+
+/*
+ * Populate the search array that we just allocated.
+ * Be slightly paranoid here.  The ELF file is mmap'd and could
+ * conceivably change between symbol_count() and symsearch_populate().
+ * If we notice any difference, bail out rather than potentially
+ * propagating errors or crashing.
+ */
+static void symsearch_populate(struct elf_info *elf,
+			       struct syminfo *table,
+			       unsigned int table_size)
+{
+	bool is_arm = (elf->hdr->e_machine == EM_ARM);
+
+	for (Elf_Sym *sym = elf->symtab_start; sym < elf->symtab_stop; sym++) {
+		if (is_valid_name(elf, sym)) {
+			if (table_size-- == 0)
+				fatal("%s: size mismatch\n", __func__);
+			table->symbol_index = sym - elf->symtab_start;
+			table->section_index = get_secindex(elf, sym);
+			table->addr = sym->st_value;
+
+			/*
+			 * For ARM Thumb instruction, the bit 0 of st_value is
+			 * set if the symbol is STT_FUNC type. Mask it to get
+			 * the address.
+			 */
+			if (is_arm && ELF_ST_TYPE(sym->st_info) == STT_FUNC)
+				table->addr &= ~1;
+
+			table++;
+		}
+	}
+
+	if (table_size != 0)
+		fatal("%s: size mismatch\n", __func__);
+}
+
+/*
+ * Do any fixups on the table after sorting.
+ * For now, this just finds adjacent entries which have
+ * the same section_index and addr, and it propagates
+ * the first symbol_index over the subsequent entries,
+ * so that only one symbol_index is seen for any given
+ * section_index and addr.  This ensures that whether
+ * we're looking at an address from "above" or "below"
+ * that we see the same symbol_index.
+ * This does leave some duplicate entries in the table;
+ * in practice, these are a small fraction of the
+ * total number of entries, and they are harmless to
+ * the binary search algorithm other than a few occasional
+ * unnecessary comparisons.
+ */
+static void symsearch_fixup(struct syminfo *table, unsigned int table_size)
+{
+	/* Don't look at index 0, it will never change. */
+	for (unsigned int i = 1; i < table_size; i++) {
+		if (table[i].addr == table[i - 1].addr &&
+		    table[i].section_index == table[i - 1].section_index) {
+			table[i].symbol_index = table[i - 1].symbol_index;
+		}
+	}
+}
+
+void symsearch_init(struct elf_info *elf)
+{
+	unsigned int table_size = symbol_count(elf);
+
+	elf->symsearch = xmalloc(sizeof(struct symsearch) +
+				       sizeof(struct syminfo) * table_size);
+	elf->symsearch->table_size = table_size;
+
+	symsearch_populate(elf, elf->symsearch->table, table_size);
+	qsort(elf->symsearch->table, table_size,
+	      sizeof(struct syminfo), syminfo_compare);
+
+	symsearch_fixup(elf->symsearch->table, table_size);
+}
+
+void symsearch_finish(struct elf_info *elf)
+{
+	free(elf->symsearch);
+	elf->symsearch = NULL;
+}
+
+/*
+ * Find the syminfo which is in secndx and "nearest" to addr.
+ * allow_negative: allow returning a symbol whose address is > addr.
+ * min_distance: ignore symbols which are further away than this.
+ *
+ * Returns a pointer into the symbol table for success.
+ * Returns NULL if no legal symbol is found within the requested range.
+ */
+Elf_Sym *symsearch_find_nearest(struct elf_info *elf, Elf_Addr addr,
+				unsigned int secndx, bool allow_negative,
+				Elf_Addr min_distance)
+{
+	unsigned int hi = elf->symsearch->table_size;
+	unsigned int lo = 0;
+	struct syminfo *table = elf->symsearch->table;
+	struct syminfo target;
+
+	target.addr = addr;
+	target.section_index = secndx;
+	target.symbol_index = ~0;  /* compares greater than any actual index */
+	while (hi > lo) {
+		unsigned int mid = lo + (hi - lo) / 2;  /* Avoids overflow */
+
+		if (syminfo_compare(&table[mid], &target) > 0)
+			hi = mid;
+		else
+			lo = mid + 1;
+	}
+
+	/*
+	 * table[hi], if it exists, is the first entry in the array which
+	 * lies beyond target.  table[hi - 1], if it exists, is the last
+	 * entry in the array which comes before target, including the
+	 * case where it perfectly matches the section and the address.
+	 *
+	 * Note -- if the address we're looking up falls perfectly
+	 * in the middle of two symbols, this is written to always
+	 * prefer the symbol with the lower address.
+	 */
+	Elf_Sym *result = NULL;
+
+	if (allow_negative &&
+	    hi < elf->symsearch->table_size &&
+	    table[hi].section_index == secndx &&
+	    table[hi].addr - addr <= min_distance) {
+		min_distance = table[hi].addr - addr;
+		result = &elf->symtab_start[table[hi].symbol_index];
+	}
+	if (hi > 0 &&
+	    table[hi - 1].section_index == secndx &&
+	    addr - table[hi - 1].addr <= min_distance) {
+		result = &elf->symtab_start[table[hi - 1].symbol_index];
+	}
+	return result;
+}