v4.19.13 snapshot.
diff --git a/scripts/mod/.gitignore b/scripts/mod/.gitignore
new file mode 100644
index 0000000..3bd11b6
--- /dev/null
+++ b/scripts/mod/.gitignore
@@ -0,0 +1,4 @@
+elfconfig.h
+mk_elfconfig
+modpost
+devicetable-offsets.h
diff --git a/scripts/mod/Makefile b/scripts/mod/Makefile
new file mode 100644
index 0000000..42c5d50
--- /dev/null
+++ b/scripts/mod/Makefile
@@ -0,0 +1,27 @@
+# SPDX-License-Identifier: GPL-2.0
+OBJECT_FILES_NON_STANDARD := y
+
+hostprogs-y := modpost mk_elfconfig
+always := $(hostprogs-y) empty.o
+
+modpost-objs := modpost.o file2alias.o sumversion.o
+
+devicetable-offsets-file := devicetable-offsets.h
+
+$(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: $(obj)/elfconfig.h
+$(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 0000000..2930044
--- /dev/null
+++ b/scripts/mod/devicetable-offsets.c
@@ -0,0 +1,229 @@
+// SPDX-License-Identifier: GPL-2.0
+#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(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(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(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(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_FIELD(typec_device_id, mode);
+
+ return 0;
+}
diff --git a/scripts/mod/empty.c b/scripts/mod/empty.c
new file mode 100644
index 0000000..49839cc
--- /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 0000000..7be4369
--- /dev/null
+++ b/scripts/mod/file2alias.c
@@ -0,0 +1,1473 @@
+/* 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 "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>
+
+typedef uint32_t __u32;
+typedef uint16_t __u16;
+typedef unsigned char __u8;
+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"
+
+/* This array collects all instances that use the generic do_table */
+struct devtable {
+ const char *device_id; /* name of table, __mod_<name>__*_device_table. */
+ unsigned long id_size;
+ void *function;
+};
+
+#define ___cat(a,b) a ## b
+#define __cat(a,b) ___cat(a,b)
+
+/* we need some special handling for this host tool running eventually on
+ * Darwin. The Mach-O section handling is a bit different than ELF section
+ * handling. The differnces in detail are:
+ * a) we have segments which have sections
+ * b) we need a API call to get the respective section symbols */
+#if defined(__MACH__)
+#include <mach-o/getsect.h>
+
+#define INIT_SECTION(name) do { \
+ unsigned long name ## _len; \
+ char *__cat(pstart_,name) = getsectdata("__TEXT", \
+ #name, &__cat(name,_len)); \
+ char *__cat(pstop_,name) = __cat(pstart_,name) + \
+ __cat(name, _len); \
+ __cat(__start_,name) = (void *)__cat(pstart_,name); \
+ __cat(__stop_,name) = (void *)__cat(pstop_,name); \
+ } while (0)
+#define SECTION(name) __attribute__((section("__TEXT, " #name)))
+
+struct devtable **__start___devtable, **__stop___devtable;
+#else
+#define INIT_SECTION(name) /* no-op for ELF */
+#define SECTION(name) __attribute__((section(#name)))
+
+/* We construct a table of pointers in an ELF section (pointers generally
+ * go unpadded by gcc). ld creates boundary syms for us. */
+extern struct devtable *__start___devtable[], *__stop___devtable[];
+#endif /* __MACH__ */
+
+#if !defined(__used)
+# if __GNUC__ == 3 && __GNUC_MINOR__ < 3
+# define __used __attribute__((__unused__))
+# else
+# define __used __attribute__((__used__))
+# endif
+#endif
+
+/* 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 = TO_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)
+
+/* Add a table entry. We test function type matches while we're here. */
+#define ADD_TO_DEVTABLE(device_id, type, function) \
+ static struct devtable __cat(devtable,__LINE__) = { \
+ device_id + 0*sizeof((function)((const char *)NULL, \
+ (void *)NULL, \
+ (char *)NULL)), \
+ SIZE_##type, (function) }; \
+ static struct devtable *SECTION(__devtable) __used \
+ __cat(devtable_ptr,__LINE__) = &__cat(devtable,__LINE__)
+
+#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)
+
+/* End in a wildcard, for future extension */
+static inline void add_wildcard(char *str)
+{
+ int len = strlen(str);
+
+ if (str[len - 1] != '*')
+ strcat(str + len, "*");
+}
+
+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]);
+}
+
+/**
+ * Check that sizeof(device_id type) are consistent with size of section
+ * in .o file. If in-consistent then userspace and kernel does not agree
+ * on actual size which is a bug.
+ * Also verify that the final entry in the table is all zeros.
+ * Ignore both checks if build host differ from target host and size differs.
+ **/
+static void device_id_check(const char *modname, const char *device_id,
+ unsigned long size, unsigned long id_size,
+ void *symval)
+{
+ int i;
+
+ if (size % id_size || size < id_size) {
+ fatal("%s: sizeof(struct %s_device_id)=%lu is not a modulo "
+ "of the size of "
+ "section __mod_%s__<identifier>_device_table=%lu.\n"
+ "Fix definition of struct %s_device_id "
+ "in mod_devicetable.h\n",
+ modname, device_id, id_size, device_id, size, device_id);
+ }
+ /* Verify last one is a terminator */
+ for (i = 0; i < id_size; i++ ) {
+ if (*(uint8_t*)(symval+size-id_size+i)) {
+ fprintf(stderr,"%s: struct %s_device_id is %lu bytes. "
+ "The last of %lu is:\n",
+ modname, device_id, id_size, size / id_size);
+ for (i = 0; i < id_size; i++ )
+ fprintf(stderr,"0x%02x ",
+ *(uint8_t*)(symval+size-id_size+i) );
+ fprintf(stderr,"\n");
+ fatal("%s: struct %s_device_id is not terminated "
+ "with a NULL entry!\n", modname, device_id);
+ }
+ }
+}
+
+/* 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);
+
+ add_wildcard(alias);
+ buf_printf(&mod->dev_table_buf,
+ "MODULE_ALIAS(\"%s\");\n", 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(void *symval, struct module *mod)
+{
+ 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_usb_table(void *symval, unsigned long size,
+ struct module *mod)
+{
+ unsigned int i;
+ const unsigned long id_size = SIZE_usb_device_id;
+
+ device_id_check(mod->name, "usb", size, id_size, symval);
+
+ /* Leave last one: it's the terminator. */
+ size -= id_size;
+
+ for (i = 0; i < size; i += id_size)
+ do_usb_entry_multi(symval + i, mod);
+}
+
+static void do_of_entry_multi(void *symval, struct module *mod)
+{
+ 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 = '_';
+
+ buf_printf(&mod->dev_table_buf, "MODULE_ALIAS(\"%s\");\n", alias);
+ strcat(alias, "C");
+ add_wildcard(alias);
+ buf_printf(&mod->dev_table_buf, "MODULE_ALIAS(\"%s\");\n", alias);
+}
+
+static void do_of_table(void *symval, unsigned long size,
+ struct module *mod)
+{
+ unsigned int i;
+ const unsigned long id_size = SIZE_of_device_id;
+
+ device_id_check(mod->name, "of", size, id_size, symval);
+
+ /* Leave last one: it's the terminator. */
+ size -= id_size;
+
+ for (i = 0; i < size; i += id_size)
+ do_of_entry_multi(symval + i, mod);
+}
+
+/* Looks like: hid:bNvNpN */
+static int do_hid_entry(const char *filename,
+ void *symval, char *alias)
+{
+ 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);
+
+ sprintf(alias, "hid:");
+ 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);
+
+ return 1;
+}
+ADD_TO_DEVTABLE("hid", hid_device_id, do_hid_entry);
+
+/* Looks like: ieee1394:venNmoNspNverN */
+static int do_ieee1394_entry(const char *filename,
+ void *symval, char *alias)
+{
+ 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);
+
+ strcpy(alias, "ieee1394:");
+ 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);
+
+ add_wildcard(alias);
+ return 1;
+}
+ADD_TO_DEVTABLE("ieee1394", ieee1394_device_id, do_ieee1394_entry);
+
+/* Looks like: pci:vNdNsvNsdNbcNscNiN. */
+static int do_pci_entry(const char *filename,
+ void *symval, char *alias)
+{
+ /* 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);
+
+ strcpy(alias, "pci:");
+ 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",
+ filename, class_mask);
+ return 0;
+ }
+
+ ADD(alias, "bc", baseclass_mask == 0xFF, baseclass);
+ ADD(alias, "sc", subclass_mask == 0xFF, subclass);
+ ADD(alias, "i", interface_mask == 0xFF, interface);
+ add_wildcard(alias);
+ return 1;
+}
+ADD_TO_DEVTABLE("pci", pci_device_id, do_pci_entry);
+
+/* looks like: "ccw:tNmNdtNdmN" */
+static int do_ccw_entry(const char *filename,
+ void *symval, char *alias)
+{
+ 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);
+
+ strcpy(alias, "ccw:");
+ 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);
+ add_wildcard(alias);
+ return 1;
+}
+ADD_TO_DEVTABLE("ccw", ccw_device_id, do_ccw_entry);
+
+/* looks like: "ap:tN" */
+static int do_ap_entry(const char *filename,
+ void *symval, char *alias)
+{
+ DEF_FIELD(symval, ap_device_id, dev_type);
+
+ sprintf(alias, "ap:t%02X*", dev_type);
+ return 1;
+}
+ADD_TO_DEVTABLE("ap", ap_device_id, do_ap_entry);
+
+/* looks like: "css:tN" */
+static int do_css_entry(const char *filename,
+ void *symval, char *alias)
+{
+ DEF_FIELD(symval, css_device_id, type);
+
+ sprintf(alias, "css:t%01X", type);
+ return 1;
+}
+ADD_TO_DEVTABLE("css", css_device_id, do_css_entry);
+
+/* Looks like: "serio:tyNprNidNexN" */
+static int do_serio_entry(const char *filename,
+ void *symval, char *alias)
+{
+ 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);
+
+ strcpy(alias, "serio:");
+ 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);
+
+ add_wildcard(alias);
+ return 1;
+}
+ADD_TO_DEVTABLE("serio", serio_device_id, do_serio_entry);
+
+/* 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 int do_acpi_entry(const char *filename,
+ void *symval, char *alias)
+{
+ DEF_FIELD_ADDR(symval, acpi_device_id, id);
+ DEF_FIELD_ADDR(symval, acpi_device_id, cls);
+ DEF_FIELD_ADDR(symval, acpi_device_id, cls_msk);
+
+ if (id && strlen((const char *)*id))
+ sprintf(alias, "acpi*:%s:*", *id);
+ else if (cls) {
+ int i, byte_shift, cnt = 0;
+ unsigned int msk;
+
+ sprintf(&alias[cnt], "acpi*:");
+ cnt = 6;
+ 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;
+ }
+ sprintf(&alias[cnt], ":*");
+ }
+ return 1;
+}
+ADD_TO_DEVTABLE("acpi", acpi_device_id, do_acpi_entry);
+
+/* looks like: "pnp:dD" */
+static void do_pnp_device_entry(void *symval, unsigned long size,
+ struct module *mod)
+{
+ const unsigned long id_size = SIZE_pnp_device_id;
+ const unsigned int count = (size / id_size)-1;
+ unsigned int i;
+
+ device_id_check(mod->name, "pnp", size, id_size, symval);
+
+ for (i = 0; i < count; i++) {
+ DEF_FIELD_ADDR(symval + i*id_size, pnp_device_id, id);
+ char acpi_id[sizeof(*id)];
+ int j;
+
+ buf_printf(&mod->dev_table_buf,
+ "MODULE_ALIAS(\"pnp:d%s*\");\n", *id);
+
+ /* fix broken pnp bus lowercasing */
+ for (j = 0; j < sizeof(acpi_id); j++)
+ acpi_id[j] = toupper((*id)[j]);
+ buf_printf(&mod->dev_table_buf,
+ "MODULE_ALIAS(\"acpi*:%s:*\");\n", acpi_id);
+ }
+}
+
+/* looks like: "pnp:dD" for every device of the card */
+static void do_pnp_card_entries(void *symval, unsigned long size,
+ struct module *mod)
+{
+ const unsigned long id_size = SIZE_pnp_card_device_id;
+ const unsigned int count = (size / id_size)-1;
+ unsigned int i;
+
+ device_id_check(mod->name, "pnp", size, id_size, symval);
+
+ for (i = 0; i < count; i++) {
+ unsigned int j;
+ DEF_FIELD_ADDR(symval + i*id_size, pnp_card_device_id, devs);
+
+ for (j = 0; j < PNP_MAX_DEVICES; j++) {
+ const char *id = (char *)(*devs)[j].id;
+ int i2, j2;
+ int dup = 0;
+
+ if (!id[0])
+ break;
+
+ /* find duplicate, already added value */
+ for (i2 = 0; i2 < i && !dup; i2++) {
+ DEF_FIELD_ADDR(symval + i2*id_size, pnp_card_device_id, devs);
+
+ for (j2 = 0; j2 < PNP_MAX_DEVICES; j2++) {
+ const char *id2 = (char *)(*devs)[j2].id;
+
+ if (!id2[0])
+ break;
+
+ if (!strcmp(id, id2)) {
+ dup = 1;
+ break;
+ }
+ }
+ }
+
+ /* add an individual alias for every device entry */
+ if (!dup) {
+ char acpi_id[PNP_ID_LEN];
+ int k;
+
+ buf_printf(&mod->dev_table_buf,
+ "MODULE_ALIAS(\"pnp:d%s*\");\n", id);
+
+ /* fix broken pnp bus lowercasing */
+ for (k = 0; k < sizeof(acpi_id); k++)
+ acpi_id[k] = toupper(id[k]);
+ buf_printf(&mod->dev_table_buf,
+ "MODULE_ALIAS(\"acpi*:%s:*\");\n", acpi_id);
+ }
+ }
+ }
+}
+
+/* Looks like: pcmcia:mNcNfNfnNpfnNvaNvbNvcNvdN. */
+static int do_pcmcia_entry(const char *filename,
+ void *symval, char *alias)
+{
+ unsigned int i;
+ 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);
+
+ for (i=0; i<4; i++) {
+ (*prod_id_hash)[i] = TO_NATIVE((*prod_id_hash)[i]);
+ }
+
+ strcpy(alias, "pcmcia:");
+ 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, (*prod_id_hash)[0]);
+ ADD(alias, "pb", match_flags & PCMCIA_DEV_ID_MATCH_PROD_ID2, (*prod_id_hash)[1]);
+ ADD(alias, "pc", match_flags & PCMCIA_DEV_ID_MATCH_PROD_ID3, (*prod_id_hash)[2]);
+ ADD(alias, "pd", match_flags & PCMCIA_DEV_ID_MATCH_PROD_ID4, (*prod_id_hash)[3]);
+
+ add_wildcard(alias);
+ return 1;
+}
+ADD_TO_DEVTABLE("pcmcia", pcmcia_device_id, do_pcmcia_entry);
+
+static int do_vio_entry(const char *filename, void *symval,
+ char *alias)
+{
+ 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 = '_';
+
+ add_wildcard(alias);
+ return 1;
+}
+ADD_TO_DEVTABLE("vio", vio_device_id, do_vio_entry);
+
+#define ARRAY_SIZE(x) (sizeof(x) / sizeof((x)[0]))
+
+static void do_input(char *alias,
+ kernel_ulong_t *arr, unsigned int min, unsigned int max)
+{
+ unsigned int i;
+
+ for (i = min / BITS_PER_LONG; i < max / BITS_PER_LONG + 1; i++)
+ arr[i] = TO_NATIVE(arr[i]);
+ for (i = min; i < max; i++)
+ if (arr[i / BITS_PER_LONG] & (1L << (i%BITS_PER_LONG)))
+ sprintf(alias + strlen(alias), "%X,*", i);
+}
+
+/* input:b0v0p0e0-eXkXrXaXmXlXsXfXwX where X is comma-separated %02X. */
+static int do_input_entry(const char *filename, void *symval,
+ char *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);
+
+ sprintf(alias, "input:");
+
+ 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);
+
+ sprintf(alias + strlen(alias), "-e*");
+ if (flags & INPUT_DEVICE_ID_MATCH_EVBIT)
+ do_input(alias, *evbit, 0, INPUT_DEVICE_ID_EV_MAX);
+ sprintf(alias + strlen(alias), "k*");
+ if (flags & INPUT_DEVICE_ID_MATCH_KEYBIT)
+ do_input(alias, *keybit,
+ INPUT_DEVICE_ID_KEY_MIN_INTERESTING,
+ INPUT_DEVICE_ID_KEY_MAX);
+ sprintf(alias + strlen(alias), "r*");
+ if (flags & INPUT_DEVICE_ID_MATCH_RELBIT)
+ do_input(alias, *relbit, 0, INPUT_DEVICE_ID_REL_MAX);
+ sprintf(alias + strlen(alias), "a*");
+ if (flags & INPUT_DEVICE_ID_MATCH_ABSBIT)
+ do_input(alias, *absbit, 0, INPUT_DEVICE_ID_ABS_MAX);
+ sprintf(alias + strlen(alias), "m*");
+ if (flags & INPUT_DEVICE_ID_MATCH_MSCIT)
+ do_input(alias, *mscbit, 0, INPUT_DEVICE_ID_MSC_MAX);
+ sprintf(alias + strlen(alias), "l*");
+ if (flags & INPUT_DEVICE_ID_MATCH_LEDBIT)
+ do_input(alias, *ledbit, 0, INPUT_DEVICE_ID_LED_MAX);
+ sprintf(alias + strlen(alias), "s*");
+ if (flags & INPUT_DEVICE_ID_MATCH_SNDBIT)
+ do_input(alias, *sndbit, 0, INPUT_DEVICE_ID_SND_MAX);
+ sprintf(alias + strlen(alias), "f*");
+ if (flags & INPUT_DEVICE_ID_MATCH_FFBIT)
+ do_input(alias, *ffbit, 0, INPUT_DEVICE_ID_FF_MAX);
+ sprintf(alias + strlen(alias), "w*");
+ if (flags & INPUT_DEVICE_ID_MATCH_SWBIT)
+ do_input(alias, *swbit, 0, INPUT_DEVICE_ID_SW_MAX);
+ return 1;
+}
+ADD_TO_DEVTABLE("input", input_device_id, do_input_entry);
+
+static int do_eisa_entry(const char *filename, void *symval,
+ char *alias)
+{
+ DEF_FIELD_ADDR(symval, eisa_device_id, sig);
+ if (sig[0])
+ sprintf(alias, EISA_DEVICE_MODALIAS_FMT "*", *sig);
+ else
+ strcat(alias, "*");
+ return 1;
+}
+ADD_TO_DEVTABLE("eisa", eisa_device_id, do_eisa_entry);
+
+/* Looks like: parisc:tNhvNrevNsvN */
+static int do_parisc_entry(const char *filename, void *symval,
+ char *alias)
+{
+ 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);
+
+ strcpy(alias, "parisc:");
+ 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);
+
+ add_wildcard(alias);
+ return 1;
+}
+ADD_TO_DEVTABLE("parisc", parisc_device_id, do_parisc_entry);
+
+/* Looks like: sdio:cNvNdN. */
+static int do_sdio_entry(const char *filename,
+ void *symval, char *alias)
+{
+ DEF_FIELD(symval, sdio_device_id, class);
+ DEF_FIELD(symval, sdio_device_id, vendor);
+ DEF_FIELD(symval, sdio_device_id, device);
+
+ strcpy(alias, "sdio:");
+ 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);
+ add_wildcard(alias);
+ return 1;
+}
+ADD_TO_DEVTABLE("sdio", sdio_device_id, do_sdio_entry);
+
+/* Looks like: ssb:vNidNrevN. */
+static int do_ssb_entry(const char *filename,
+ void *symval, char *alias)
+{
+ DEF_FIELD(symval, ssb_device_id, vendor);
+ DEF_FIELD(symval, ssb_device_id, coreid);
+ DEF_FIELD(symval, ssb_device_id, revision);
+
+ strcpy(alias, "ssb:");
+ ADD(alias, "v", vendor != SSB_ANY_VENDOR, vendor);
+ ADD(alias, "id", coreid != SSB_ANY_ID, coreid);
+ ADD(alias, "rev", revision != SSB_ANY_REV, revision);
+ add_wildcard(alias);
+ return 1;
+}
+ADD_TO_DEVTABLE("ssb", ssb_device_id, do_ssb_entry);
+
+/* Looks like: bcma:mNidNrevNclN. */
+static int do_bcma_entry(const char *filename,
+ void *symval, char *alias)
+{
+ 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);
+
+ strcpy(alias, "bcma:");
+ 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);
+ add_wildcard(alias);
+ return 1;
+}
+ADD_TO_DEVTABLE("bcma", bcma_device_id, do_bcma_entry);
+
+/* Looks like: virtio:dNvN */
+static int do_virtio_entry(const char *filename, void *symval,
+ char *alias)
+{
+ DEF_FIELD(symval, virtio_device_id, device);
+ DEF_FIELD(symval, virtio_device_id, vendor);
+
+ strcpy(alias, "virtio:");
+ ADD(alias, "d", device != VIRTIO_DEV_ANY_ID, device);
+ ADD(alias, "v", vendor != VIRTIO_DEV_ANY_ID, vendor);
+
+ add_wildcard(alias);
+ return 1;
+}
+ADD_TO_DEVTABLE("virtio", virtio_device_id, do_virtio_entry);
+
+/*
+ * Looks like: vmbus:guid
+ * Each byte of the guid will be represented by two hex characters
+ * in the name.
+ */
+
+static int do_vmbus_entry(const char *filename, void *symval,
+ char *alias)
+{
+ int i;
+ DEF_FIELD_ADDR(symval, hv_vmbus_device_id, guid);
+ char guid_name[(sizeof(*guid) + 1) * 2];
+
+ for (i = 0; i < (sizeof(*guid) * 2); i += 2)
+ sprintf(&guid_name[i], "%02x", TO_NATIVE((guid->b)[i/2]));
+
+ strcpy(alias, "vmbus:");
+ strcat(alias, guid_name);
+
+ return 1;
+}
+ADD_TO_DEVTABLE("vmbus", hv_vmbus_device_id, do_vmbus_entry);
+
+/* Looks like: rpmsg:S */
+static int do_rpmsg_entry(const char *filename, void *symval,
+ char *alias)
+{
+ DEF_FIELD_ADDR(symval, rpmsg_device_id, name);
+ sprintf(alias, RPMSG_DEVICE_MODALIAS_FMT, *name);
+
+ return 1;
+}
+ADD_TO_DEVTABLE("rpmsg", rpmsg_device_id, do_rpmsg_entry);
+
+/* Looks like: i2c:S */
+static int do_i2c_entry(const char *filename, void *symval,
+ char *alias)
+{
+ DEF_FIELD_ADDR(symval, i2c_device_id, name);
+ sprintf(alias, I2C_MODULE_PREFIX "%s", *name);
+
+ return 1;
+}
+ADD_TO_DEVTABLE("i2c", i2c_device_id, do_i2c_entry);
+
+/* Looks like: spi:S */
+static int do_spi_entry(const char *filename, void *symval,
+ char *alias)
+{
+ DEF_FIELD_ADDR(symval, spi_device_id, name);
+ sprintf(alias, SPI_MODULE_PREFIX "%s", *name);
+
+ return 1;
+}
+ADD_TO_DEVTABLE("spi", spi_device_id, do_spi_entry);
+
+static const struct dmifield {
+ const char *prefix;
+ int field;
+} dmi_fields[] = {
+ { "bvn", DMI_BIOS_VENDOR },
+ { "bvr", DMI_BIOS_VERSION },
+ { "bd", DMI_BIOS_DATE },
+ { "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, const char *s)
+{
+ /* Filter out characters we don't want to see in the modalias string */
+ for (; *s; s++)
+ if (*s > ' ' && *s < 127 && *s != ':')
+ *(d++) = *s;
+
+ *d = 0;
+}
+
+
+static int do_dmi_entry(const char *filename, void *symval,
+ char *alias)
+{
+ int i, j;
+ DEF_FIELD_ADDR(symval, dmi_system_id, matches);
+ sprintf(alias, "dmi*");
+
+ 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) {
+ sprintf(alias + strlen(alias), ":%s*",
+ dmi_fields[i].prefix);
+ dmi_ascii_filter(alias + strlen(alias),
+ (*matches)[j].substr);
+ strcat(alias, "*");
+ }
+ }
+ }
+
+ strcat(alias, ":");
+ return 1;
+}
+ADD_TO_DEVTABLE("dmi", dmi_system_id, do_dmi_entry);
+
+static int do_platform_entry(const char *filename,
+ void *symval, char *alias)
+{
+ DEF_FIELD_ADDR(symval, platform_device_id, name);
+ sprintf(alias, PLATFORM_MODULE_PREFIX "%s", *name);
+ return 1;
+}
+ADD_TO_DEVTABLE("platform", platform_device_id, do_platform_entry);
+
+static int do_mdio_entry(const char *filename,
+ void *symval, char *alias)
+{
+ int i;
+ DEF_FIELD(symval, mdio_device_id, phy_id);
+ DEF_FIELD(symval, mdio_device_id, phy_id_mask);
+
+ alias += sprintf(alias, MDIO_MODULE_PREFIX);
+
+ for (i = 0; i < 32; i++) {
+ if (!((phy_id_mask >> (31-i)) & 1))
+ *(alias++) = '?';
+ else if ((phy_id >> (31-i)) & 1)
+ *(alias++) = '1';
+ else
+ *(alias++) = '0';
+ }
+
+ /* Terminate the string */
+ *alias = 0;
+
+ return 1;
+}
+ADD_TO_DEVTABLE("mdio", mdio_device_id, do_mdio_entry);
+
+/* Looks like: zorro:iN. */
+static int do_zorro_entry(const char *filename, void *symval,
+ char *alias)
+{
+ DEF_FIELD(symval, zorro_device_id, id);
+ strcpy(alias, "zorro:");
+ ADD(alias, "i", id != ZORRO_WILDCARD, id);
+ return 1;
+}
+ADD_TO_DEVTABLE("zorro", zorro_device_id, do_zorro_entry);
+
+/* looks like: "pnp:dD" */
+static int do_isapnp_entry(const char *filename,
+ void *symval, char *alias)
+{
+ DEF_FIELD(symval, isapnp_device_id, vendor);
+ DEF_FIELD(symval, isapnp_device_id, function);
+ sprintf(alias, "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);
+ return 1;
+}
+ADD_TO_DEVTABLE("isapnp", isapnp_device_id, do_isapnp_entry);
+
+/* Looks like: "ipack:fNvNdN". */
+static int do_ipack_entry(const char *filename,
+ void *symval, char *alias)
+{
+ DEF_FIELD(symval, ipack_device_id, format);
+ DEF_FIELD(symval, ipack_device_id, vendor);
+ DEF_FIELD(symval, ipack_device_id, device);
+ strcpy(alias, "ipack:");
+ ADD(alias, "f", format != IPACK_ANY_FORMAT, format);
+ ADD(alias, "v", vendor != IPACK_ANY_ID, vendor);
+ ADD(alias, "d", device != IPACK_ANY_ID, device);
+ add_wildcard(alias);
+ return 1;
+}
+ADD_TO_DEVTABLE("ipack", ipack_device_id, do_ipack_entry);
+
+/*
+ * 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 int do_amba_entry(const char *filename,
+ void *symval, char *alias)
+{
+ 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",
+ filename, id, mask);
+
+ p += sprintf(alias, "amba:d");
+ for (digit = 0; digit < 8; digit++)
+ append_nibble_mask(&p,
+ (id >> (4 * (7 - digit))) & 0xf,
+ (mask >> (4 * (7 - digit))) & 0xf);
+
+ return 1;
+}
+ADD_TO_DEVTABLE("amba", amba_id, do_amba_entry);
+
+/*
+ * 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 int do_mips_cdmm_entry(const char *filename,
+ void *symval, char *alias)
+{
+ DEF_FIELD(symval, mips_cdmm_device_id, type);
+
+ sprintf(alias, "mipscdmm:t%02X*", type);
+ return 1;
+}
+ADD_TO_DEVTABLE("mipscdmm", mips_cdmm_device_id, do_mips_cdmm_entry);
+
+/* 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 int do_x86cpu_entry(const char *filename, void *symval,
+ char *alias)
+{
+ 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);
+
+ strcpy(alias, "cpu:type:x86,");
+ 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);
+ return 1;
+}
+ADD_TO_DEVTABLE("x86cpu", x86_cpu_id, do_x86cpu_entry);
+
+/* LOOKS like cpu:type:*:feature:*FEAT* */
+static int do_cpu_entry(const char *filename, void *symval, char *alias)
+{
+ DEF_FIELD(symval, cpu_feature, feature);
+
+ sprintf(alias, "cpu:type:*:feature:*%04X*", feature);
+ return 1;
+}
+ADD_TO_DEVTABLE("cpu", cpu_feature, do_cpu_entry);
+
+/* Looks like: mei:S:uuid:N:* */
+static int do_mei_entry(const char *filename, void *symval,
+ char *alias)
+{
+ 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);
+
+ sprintf(alias, MEI_CL_MODULE_PREFIX);
+ sprintf(alias + strlen(alias), "%s:", (*name)[0] ? *name : "*");
+ add_uuid(alias, *uuid);
+ ADD(alias, ":", version != MEI_CL_VERSION_ANY, version);
+
+ strcat(alias, ":*");
+
+ return 1;
+}
+ADD_TO_DEVTABLE("mei", mei_cl_device_id, do_mei_entry);
+
+/* Looks like: rapidio:vNdNavNadN */
+static int do_rio_entry(const char *filename,
+ void *symval, char *alias)
+{
+ 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);
+
+ strcpy(alias, "rapidio:");
+ 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);
+
+ add_wildcard(alias);
+ return 1;
+}
+ADD_TO_DEVTABLE("rapidio", rio_device_id, do_rio_entry);
+
+/* Looks like: ulpi:vNpN */
+static int do_ulpi_entry(const char *filename, void *symval,
+ char *alias)
+{
+ DEF_FIELD(symval, ulpi_device_id, vendor);
+ DEF_FIELD(symval, ulpi_device_id, product);
+
+ sprintf(alias, "ulpi:v%04xp%04x", vendor, product);
+
+ return 1;
+}
+ADD_TO_DEVTABLE("ulpi", ulpi_device_id, do_ulpi_entry);
+
+/* Looks like: hdaudio:vNrNaN */
+static int do_hda_entry(const char *filename, void *symval, char *alias)
+{
+ DEF_FIELD(symval, hda_device_id, vendor_id);
+ DEF_FIELD(symval, hda_device_id, rev_id);
+ DEF_FIELD(symval, hda_device_id, api_version);
+
+ strcpy(alias, "hdaudio:");
+ ADD(alias, "v", vendor_id != 0, vendor_id);
+ ADD(alias, "r", rev_id != 0, rev_id);
+ ADD(alias, "a", api_version != 0, api_version);
+
+ add_wildcard(alias);
+ return 1;
+}
+ADD_TO_DEVTABLE("hdaudio", hda_device_id, do_hda_entry);
+
+/* Looks like: sdw:mNpN */
+static int do_sdw_entry(const char *filename, void *symval, char *alias)
+{
+ DEF_FIELD(symval, sdw_device_id, mfg_id);
+ DEF_FIELD(symval, sdw_device_id, part_id);
+
+ strcpy(alias, "sdw:");
+ ADD(alias, "m", mfg_id != 0, mfg_id);
+ ADD(alias, "p", part_id != 0, part_id);
+
+ add_wildcard(alias);
+ return 1;
+}
+ADD_TO_DEVTABLE("sdw", sdw_device_id, do_sdw_entry);
+
+/* Looks like: fsl-mc:vNdN */
+static int do_fsl_mc_entry(const char *filename, void *symval,
+ char *alias)
+{
+ DEF_FIELD(symval, fsl_mc_device_id, vendor);
+ DEF_FIELD_ADDR(symval, fsl_mc_device_id, obj_type);
+
+ sprintf(alias, "fsl-mc:v%08Xd%s", vendor, *obj_type);
+ return 1;
+}
+ADD_TO_DEVTABLE("fslmc", fsl_mc_device_id, do_fsl_mc_entry);
+
+/* Looks like: tbsvc:kSpNvNrN */
+static int do_tbsvc_entry(const char *filename, void *symval, char *alias)
+{
+ 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);
+
+ strcpy(alias, "tbsvc:");
+ 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);
+
+ add_wildcard(alias);
+ return 1;
+}
+ADD_TO_DEVTABLE("tbsvc", tb_service_id, do_tbsvc_entry);
+
+/* Looks like: typec:idNmN */
+static int do_typec_entry(const char *filename, void *symval, char *alias)
+{
+ DEF_FIELD(symval, typec_device_id, svid);
+ DEF_FIELD(symval, typec_device_id, mode);
+
+ sprintf(alias, "typec:id%04X", svid);
+ ADD(alias, "m", mode != TYPEC_ANY_MODE, mode);
+
+ return 1;
+}
+ADD_TO_DEVTABLE("typec", typec_device_id, do_typec_entry);
+
+/* 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(void *symval, unsigned long size,
+ unsigned long id_size,
+ const char *device_id,
+ void *function,
+ struct module *mod)
+{
+ unsigned int i;
+ char alias[500];
+ int (*do_entry)(const char *, void *entry, char *alias) = function;
+
+ device_id_check(mod->name, device_id, size, id_size, symval);
+ /* Leave last one: it's the terminator. */
+ size -= id_size;
+
+ for (i = 0; i < size; i += id_size) {
+ if (do_entry(mod->name, symval+i, alias)) {
+ buf_printf(&mod->dev_table_buf,
+ "MODULE_ALIAS(\"%s\");\n", alias);
+ }
+ }
+}
+
+/* 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 *name, *identifier;
+ unsigned int namelen;
+
+ /* 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 <prefix>__mod_<name>__<identifier>_device_table. */
+ name = strstr(symname, "__mod_");
+ if (!name)
+ return;
+ name += strlen("__mod_");
+ namelen = strlen(name);
+ if (namelen < strlen("_device_table"))
+ return;
+ if (strcmp(name + namelen - strlen("_device_table"), "_device_table"))
+ return;
+ identifier = strstr(name, "__");
+ if (!identifier)
+ return;
+ namelen = identifier - name;
+
+ /* 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 = (void *)info->hdr
+ + info->sechdrs[get_secindex(info, sym)].sh_offset
+ + sym->st_value;
+ }
+
+ /* First handle the "special" cases */
+ if (sym_is(name, namelen, "usb"))
+ do_usb_table(symval, sym->st_size, mod);
+ if (sym_is(name, namelen, "of"))
+ do_of_table(symval, sym->st_size, mod);
+ else if (sym_is(name, namelen, "pnp"))
+ do_pnp_device_entry(symval, sym->st_size, mod);
+ else if (sym_is(name, namelen, "pnp_card"))
+ do_pnp_card_entries(symval, sym->st_size, mod);
+ else {
+ struct devtable **p;
+ INIT_SECTION(__devtable);
+
+ for (p = __start___devtable; p < __stop___devtable; p++) {
+ if (sym_is(name, namelen, (*p)->device_id)) {
+ do_table(symval, sym->st_size, (*p)->id_size,
+ (*p)->device_id, (*p)->function, mod);
+ break;
+ }
+ }
+ }
+ free(zeros);
+}
+
+/* Now add out buffered information to the generated C source */
+void add_moddevtable(struct buffer *buf, struct module *mod)
+{
+ buf_printf(buf, "\n");
+ buf_write(buf, mod->dev_table_buf.p, mod->dev_table_buf.pos);
+ free(mod->dev_table_buf.p);
+}
diff --git a/scripts/mod/mk_elfconfig.c b/scripts/mod/mk_elfconfig.c
new file mode 100644
index 0000000..680eade
--- /dev/null
+++ b/scripts/mod/mk_elfconfig.c
@@ -0,0 +1,57 @@
+// 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];
+ union { short s; char c[2]; } endian_test;
+
+ 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);
+ }
+ switch (ei[EI_DATA]) {
+ case ELFDATA2LSB:
+ printf("#define KERNEL_ELFDATA ELFDATA2LSB\n");
+ break;
+ case ELFDATA2MSB:
+ printf("#define KERNEL_ELFDATA ELFDATA2MSB\n");
+ break;
+ default:
+ exit(1);
+ }
+
+ if (sizeof(unsigned long) == 4) {
+ printf("#define HOST_ELFCLASS ELFCLASS32\n");
+ } else if (sizeof(unsigned long) == 8) {
+ printf("#define HOST_ELFCLASS ELFCLASS64\n");
+ }
+
+ endian_test.s = 0x0102;
+ if (memcmp(endian_test.c, "\x01\x02", 2) == 0)
+ printf("#define HOST_ELFDATA ELFDATA2MSB\n");
+ else if (memcmp(endian_test.c, "\x02\x01", 2) == 0)
+ printf("#define HOST_ELFDATA ELFDATA2LSB\n");
+ else
+ exit(1);
+
+ return 0;
+}
diff --git a/scripts/mod/modpost.c b/scripts/mod/modpost.c
new file mode 100644
index 0000000..0d998c5
--- /dev/null
+++ b/scripts/mod/modpost.c
@@ -0,0 +1,2531 @@
+/* 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 <stdio.h>
+#include <ctype.h>
+#include <string.h>
+#include <limits.h>
+#include <stdbool.h>
+#include <errno.h>
+#include "modpost.h"
+#include "../../include/linux/license.h"
+
+/* Are we using CONFIG_MODVERSIONS? */
+static int modversions = 0;
+/* Warn about undefined symbols? (do so if we have vmlinux) */
+static int have_vmlinux = 0;
+/* Is CONFIG_MODULE_SRCVERSION_ALL set? */
+static int all_versions = 0;
+/* If we are modposting external module set to 1 */
+static int external_module = 0;
+/* Warn about section mismatch in vmlinux if set to 1 */
+static int vmlinux_section_warnings = 1;
+/* Only warn about unresolved symbols */
+static int warn_unresolved = 0;
+/* How a symbol is exported */
+static int sec_mismatch_count = 0;
+static int sec_mismatch_verbose = 1;
+static int sec_mismatch_fatal = 0;
+/* ignore missing files */
+static int ignore_missing_files;
+
+enum export {
+ export_plain, export_unused, export_gpl,
+ export_unused_gpl, export_gpl_future, export_unknown
+};
+
+/* 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))
+
+#define PRINTF __attribute__ ((format (printf, 1, 2)))
+
+PRINTF void fatal(const char *fmt, ...)
+{
+ va_list arglist;
+
+ fprintf(stderr, "FATAL: ");
+
+ va_start(arglist, fmt);
+ vfprintf(stderr, fmt, arglist);
+ va_end(arglist);
+
+ exit(1);
+}
+
+PRINTF void warn(const char *fmt, ...)
+{
+ va_list arglist;
+
+ fprintf(stderr, "WARNING: ");
+
+ va_start(arglist, fmt);
+ vfprintf(stderr, fmt, arglist);
+ va_end(arglist);
+}
+
+PRINTF void merror(const char *fmt, ...)
+{
+ va_list arglist;
+
+ fprintf(stderr, "ERROR: ");
+
+ va_start(arglist, fmt);
+ vfprintf(stderr, fmt, arglist);
+ va_end(arglist);
+}
+
+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;
+}
+
+static int is_vmlinux(const char *modname)
+{
+ const char *myname;
+
+ myname = strrchr(modname, '/');
+ if (myname)
+ myname++;
+ else
+ myname = modname;
+
+ return (strcmp(myname, "vmlinux") == 0) ||
+ (strcmp(myname, "vmlinux.o") == 0);
+}
+
+void *do_nofail(void *ptr, const char *expr)
+{
+ if (!ptr)
+ fatal("modpost: Memory allocation failure: %s.\n", expr);
+
+ return ptr;
+}
+
+/* A list of all modules we processed */
+static struct module *modules;
+
+static struct module *find_module(const char *modname)
+{
+ struct module *mod;
+
+ for (mod = modules; mod; mod = mod->next)
+ if (strcmp(mod->name, modname) == 0)
+ break;
+ return mod;
+}
+
+static struct module *new_module(const char *modname)
+{
+ struct module *mod;
+ char *p;
+
+ mod = NOFAIL(malloc(sizeof(*mod)));
+ memset(mod, 0, sizeof(*mod));
+ p = NOFAIL(strdup(modname));
+
+ /* strip trailing .o */
+ if (strends(p, ".o")) {
+ p[strlen(p) - 2] = '\0';
+ mod->is_dot_o = 1;
+ }
+
+ /* add to list */
+ mod->name = p;
+ mod->gpl_compatible = -1;
+ mod->next = modules;
+ modules = mod;
+
+ return mod;
+}
+
+/* A hash of all exported symbols,
+ * struct symbol is also used for lists of unresolved symbols */
+
+#define SYMBOL_HASH_SIZE 1024
+
+struct symbol {
+ struct symbol *next;
+ struct module *module;
+ unsigned int crc;
+ int crc_valid;
+ unsigned int weak:1;
+ unsigned int vmlinux:1; /* 1 if symbol is defined in vmlinux */
+ unsigned int kernel:1; /* 1 if symbol is from kernel
+ * (only for external modules) **/
+ unsigned int preloaded:1; /* 1 if symbol from Module.symvers, or crc */
+ enum export export; /* Type of export */
+ char name[0];
+};
+
+static struct symbol *symbolhash[SYMBOL_HASH_SIZE];
+
+/* This is based on the hash agorithm from gdbm, via tdb */
+static inline unsigned int tdb_hash(const char *name)
+{
+ unsigned value; /* Used to compute the hash value. */
+ unsigned i; /* Used to cycle through random values. */
+
+ /* Set the initial value from the key size. */
+ for (value = 0x238F13AF * strlen(name), i = 0; name[i]; i++)
+ value = (value + (((unsigned char *)name)[i] << (i*5 % 24)));
+
+ return (1103515243 * value + 12345);
+}
+
+/**
+ * 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, unsigned int weak,
+ struct symbol *next)
+{
+ struct symbol *s = NOFAIL(malloc(sizeof(*s) + strlen(name) + 1));
+
+ memset(s, 0, sizeof(*s));
+ strcpy(s->name, name);
+ s->weak = weak;
+ s->next = next;
+ return s;
+}
+
+/* For the hash of exported symbols */
+static struct symbol *new_symbol(const char *name, struct module *module,
+ enum export export)
+{
+ unsigned int hash;
+ struct symbol *new;
+
+ hash = tdb_hash(name) % SYMBOL_HASH_SIZE;
+ new = symbolhash[hash] = alloc_symbol(name, 0, symbolhash[hash]);
+ new->module = module;
+ new->export = export;
+ return new;
+}
+
+static struct symbol *find_symbol(const char *name)
+{
+ struct symbol *s;
+
+ /* For our purposes, .foo matches foo. PPC64 needs this. */
+ if (name[0] == '.')
+ name++;
+
+ for (s = symbolhash[tdb_hash(name) % SYMBOL_HASH_SIZE]; s; s = s->next) {
+ if (strcmp(s->name, name) == 0)
+ return s;
+ }
+ return NULL;
+}
+
+static const struct {
+ const char *str;
+ enum export export;
+} export_list[] = {
+ { .str = "EXPORT_SYMBOL", .export = export_plain },
+ { .str = "EXPORT_UNUSED_SYMBOL", .export = export_unused },
+ { .str = "EXPORT_SYMBOL_GPL", .export = export_gpl },
+ { .str = "EXPORT_UNUSED_SYMBOL_GPL", .export = export_unused_gpl },
+ { .str = "EXPORT_SYMBOL_GPL_FUTURE", .export = export_gpl_future },
+ { .str = "(unknown)", .export = export_unknown },
+};
+
+
+static const char *export_str(enum export ex)
+{
+ return export_list[ex].str;
+}
+
+static enum export export_no(const char *s)
+{
+ int i;
+
+ if (!s)
+ return export_unknown;
+ for (i = 0; export_list[i].export != export_unknown; i++) {
+ if (strcmp(export_list[i].str, s) == 0)
+ return export_list[i].export;
+ }
+ return export_unknown;
+}
+
+static const char *sech_name(struct elf_info *elf, Elf_Shdr *sechdr)
+{
+ return (void *)elf->hdr +
+ elf->sechdrs[elf->secindex_strings].sh_offset +
+ sechdr->sh_name;
+}
+
+static const char *sec_name(struct elf_info *elf, int secindex)
+{
+ return sech_name(elf, &elf->sechdrs[secindex]);
+}
+
+#define strstarts(str, prefix) (strncmp(str, prefix, strlen(prefix)) == 0)
+
+static enum export export_from_secname(struct elf_info *elf, unsigned int sec)
+{
+ const char *secname = sec_name(elf, sec);
+
+ if (strstarts(secname, "___ksymtab+"))
+ return export_plain;
+ else if (strstarts(secname, "___ksymtab_unused+"))
+ return export_unused;
+ else if (strstarts(secname, "___ksymtab_gpl+"))
+ return export_gpl;
+ else if (strstarts(secname, "___ksymtab_unused_gpl+"))
+ return export_unused_gpl;
+ else if (strstarts(secname, "___ksymtab_gpl_future+"))
+ return export_gpl_future;
+ else
+ return export_unknown;
+}
+
+static enum export export_from_sec(struct elf_info *elf, unsigned int sec)
+{
+ if (sec == elf->export_sec)
+ return export_plain;
+ else if (sec == elf->export_unused_sec)
+ return export_unused;
+ else if (sec == elf->export_gpl_sec)
+ return export_gpl;
+ else if (sec == elf->export_unused_gpl_sec)
+ return export_unused_gpl;
+ else if (sec == elf->export_gpl_future_sec)
+ return export_gpl_future;
+ else
+ return export_unknown;
+}
+
+/**
+ * Add an exported symbol - it may have already been added without a
+ * CRC, in this case just update the CRC
+ **/
+static struct symbol *sym_add_exported(const char *name, struct module *mod,
+ enum export export)
+{
+ struct symbol *s = find_symbol(name);
+
+ if (!s) {
+ s = new_symbol(name, mod, export);
+ } else {
+ if (!s->preloaded) {
+ warn("%s: '%s' exported twice. Previous export "
+ "was in %s%s\n", mod->name, name,
+ s->module->name,
+ is_vmlinux(s->module->name) ?"":".ko");
+ } else {
+ /* In case Module.symvers was out of date */
+ s->module = mod;
+ }
+ }
+ s->preloaded = 0;
+ s->vmlinux = is_vmlinux(mod->name);
+ s->kernel = 0;
+ s->export = export;
+ return s;
+}
+
+static void sym_update_crc(const char *name, struct module *mod,
+ unsigned int crc, enum export export)
+{
+ struct symbol *s = find_symbol(name);
+
+ if (!s) {
+ s = new_symbol(name, mod, export);
+ /* Don't complain when we find it later. */
+ s->preloaded = 1;
+ }
+ s->crc = crc;
+ s->crc_valid = 1;
+}
+
+void *grab_file(const char *filename, unsigned long *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;
+}
+
+/**
+ * Return a copy of the next line in a mmap'ed file.
+ * spaces in the beginning of the line is trimmed away.
+ * Return a pointer to a static buffer.
+ **/
+char *get_next_line(unsigned long *pos, void *file, unsigned long size)
+{
+ static char line[4096];
+ int skip = 1;
+ size_t len = 0;
+ signed char *p = (signed char *)file + *pos;
+ char *s = line;
+
+ for (; *pos < size ; (*pos)++) {
+ if (skip && isspace(*p)) {
+ p++;
+ continue;
+ }
+ skip = 0;
+ if (*p != '\n' && (*pos < size)) {
+ len++;
+ *s++ = *p++;
+ if (len > 4095)
+ break; /* Too long, stop */
+ } else {
+ /* End of string */
+ *s = '\0';
+ return line;
+ }
+ }
+ /* End of buffer */
+ return NULL;
+}
+
+void release_file(void *file, unsigned long 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;
+ }
+ /* 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;
+
+ /* Check if file offset is correct */
+ if (hdr->e_shoff > info->size) {
+ fatal("section header offset=%lu in file '%s' is bigger than "
+ "filesize=%lu\n", (unsigned long)hdr->e_shoff,
+ filename, info->size);
+ return 0;
+ }
+
+ 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));
+ return 0;
+ }
+ 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, "__ksymtab") == 0)
+ info->export_sec = i;
+ else if (strcmp(secname, "__ksymtab_unused") == 0)
+ info->export_unused_sec = i;
+ else if (strcmp(secname, "__ksymtab_gpl") == 0)
+ info->export_gpl_sec = i;
+ else if (strcmp(secname, "__ksymtab_unused_gpl") == 0)
+ info->export_unused_gpl_sec = i;
+ else if (strcmp(secname, "__ksymtab_gpl_future") == 0)
+ info->export_gpl_future_sec = i;
+
+ 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);
+ }
+
+ return 1;
+}
+
+static void parse_elf_finish(struct elf_info *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, "_restvr_") ||
+ strstarts(symname, "_savevr_") ||
+ strcmp(symname, ".TOC.") == 0)
+ return 1;
+ /* Do not ignore this symbol */
+ return 0;
+}
+
+static void handle_modversions(struct module *mod, struct elf_info *info,
+ Elf_Sym *sym, const char *symname)
+{
+ unsigned int crc;
+ enum export export;
+ bool is_crc = false;
+
+ if ((!is_vmlinux(mod->name) || mod->is_dot_o) &&
+ strstarts(symname, "__ksymtab"))
+ export = export_from_secname(info, get_secindex(info, sym));
+ else
+ export = export_from_sec(info, get_secindex(info, sym));
+
+ /* CRC'd symbol */
+ if (strstarts(symname, "__crc_")) {
+ is_crc = true;
+ crc = (unsigned int) sym->st_value;
+ if (sym->st_shndx != SHN_UNDEF && sym->st_shndx != SHN_ABS) {
+ unsigned int *crcp;
+
+ /* symbol points to the CRC in the ELF object */
+ crcp = (void *)info->hdr + sym->st_value +
+ info->sechdrs[sym->st_shndx].sh_offset -
+ (info->hdr->e_type != ET_REL ?
+ info->sechdrs[sym->st_shndx].sh_addr : 0);
+ crc = *crcp;
+ }
+ sym_update_crc(symname + strlen("__crc_"), mod, crc,
+ export);
+ }
+
+ switch (sym->st_shndx) {
+ case SHN_COMMON:
+ if (strstarts(symname, "__gnu_lto_")) {
+ /* Should warn here, but modpost runs before the linker */
+ } else
+ warn("\"%s\" [%s] is COMMON symbol\n", symname, mod->name);
+ 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;
+/* cope with newer glibc (2.3.4 or higher) STT_ definition in elf.h */
+#if defined(STT_REGISTER) || defined(STT_SPARC_REGISTER)
+/* add compatibility with older glibc */
+#ifndef STT_SPARC_REGISTER
+#define STT_SPARC_REGISTER STT_REGISTER
+#endif
+ 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 = NOFAIL(strdup(symname));
+ munged[0] = '_';
+ munged[1] = toupper(munged[1]);
+ symname = munged;
+ }
+ }
+#endif
+
+ if (is_crc) {
+ const char *e = is_vmlinux(mod->name) ?"":".ko";
+ warn("EXPORT symbol \"%s\" [%s%s] version generation failed, symbol will not be versioned.\n",
+ symname + strlen("__crc_"), mod->name, e);
+ }
+ mod->unres = alloc_symbol(symname,
+ ELF_ST_BIND(sym->st_info) == STB_WEAK,
+ mod->unres);
+ break;
+ default:
+ /* All exported symbols */
+ if (strstarts(symname, "__ksymtab_")) {
+ sym_add_exported(symname + strlen("__ksymtab_"), mod,
+ export);
+ }
+ if (strcmp(symname, "init_module") == 0)
+ mod->has_init = 1;
+ if (strcmp(symname, "cleanup_module") == 0)
+ mod->has_cleanup = 1;
+ 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);
+}
+
+/**
+ * Test if string s ends in string sub
+ * return 0 if match
+ **/
+static int strrcmp(const char *s, const char *sub)
+{
+ int slen, sublen;
+
+ if (!s || !sub)
+ return 1;
+
+ slen = strlen(s);
+ sublen = strlen(sub);
+
+ if ((slen == 0) || (sublen == 0))
+ return 1;
+
+ if (sublen > slen)
+ return 1;
+
+ return memcmp(s + slen - sublen, sub, sublen);
+}
+
+static const char *sym_name(struct elf_info *elf, Elf_Sym *sym)
+{
+ if (sym)
+ return elf->strtab + sym->st_name;
+ else
+ return "(unknown)";
+}
+
+/* The pattern is an array of simple patterns.
+ * "foo" will match an exact string equal to "foo"
+ * "*foo" will match a string that ends with "foo"
+ * "foo*" will match a string that begins with "foo"
+ * "*foo*" will match a string that contains "foo"
+ */
+static int match(const char *sym, const char * const pat[])
+{
+ const char *p;
+ while (*pat) {
+ p = *pat++;
+ const char *endp = p + strlen(p) - 1;
+
+ /* "*foo*" */
+ if (*p == '*' && *endp == '*') {
+ char *here, *bare = strndup(p + 1, strlen(p) - 2);
+
+ here = strstr(sym, bare);
+ free(bare);
+ if (here != NULL)
+ return 1;
+ }
+ /* "*foo" */
+ else if (*p == '*') {
+ if (strrcmp(sym, p + 1) == 0)
+ return 1;
+ }
+ /* "foo*" */
+ else if (*endp == '*') {
+ if (strncmp(sym, p, strlen(p) - 1) == 0)
+ return 1;
+ }
+ /* no wildcards */
+ else {
+ if (strcmp(p, sym) == 0)
+ return 1;
+ }
+ }
+ /* no match */
+ return 0;
+}
+
+/* sections that we do not want to do full section mismatch check on */
+static const char *const section_white_list[] =
+{
+ ".comment*",
+ ".debug*",
+ ".cranges", /* sh64 */
+ ".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.*",
+ 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(const char *modname, 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)) {
+ warn("%s (%s): unexpected non-allocatable section.\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",
+ modname, sec);
+ }
+}
+
+
+
+#define ALL_INIT_DATA_SECTIONS \
+ ".init.setup", ".init.rodata", ".meminit.rodata", \
+ ".init.data", ".meminit.data"
+#define ALL_EXIT_DATA_SECTIONS \
+ ".exit.data", ".memexit.data"
+
+#define ALL_INIT_TEXT_SECTIONS \
+ ".init.text", ".meminit.text"
+#define ALL_EXIT_TEXT_SECTIONS \
+ ".exit.text", ".memexit.text"
+
+#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_XXXINIT_SECTIONS MEM_INIT_SECTIONS
+#define ALL_XXXEXIT_SECTIONS MEM_EXIT_SECTIONS
+
+#define ALL_INIT_SECTIONS INIT_SECTIONS, ALL_XXXINIT_SECTIONS
+#define ALL_EXIT_SECTIONS EXIT_SECTIONS, ALL_XXXEXIT_SECTIONS
+
+#define DATA_SECTIONS ".data", ".data.rel"
+#define TEXT_SECTIONS ".text", ".text.unlikely", ".sched.text", \
+ ".kprobes.text", ".cpuidle.text"
+#define OTHER_TEXT_SECTIONS ".ref.text", ".head.text", ".spinlock.text", \
+ ".fixup", ".entry.text", ".exception.text", ".text.*", \
+ ".coldtext"
+
+#define INIT_SECTIONS ".init.*"
+#define MEM_INIT_SECTIONS ".meminit.*"
+
+#define EXIT_SECTIONS ".exit.*"
+#define MEM_EXIT_SECTIONS ".memexit.*"
+
+#define ALL_TEXT_SECTIONS ALL_INIT_TEXT_SECTIONS, ALL_EXIT_TEXT_SECTIONS, \
+ TEXT_SECTIONS, OTHER_TEXT_SECTIONS
+
+/* init data sections */
+static const char *const init_data_sections[] =
+ { ALL_INIT_DATA_SECTIONS, NULL };
+
+/* all init sections */
+static const char *const init_sections[] = { ALL_INIT_SECTIONS, NULL };
+
+/* All init and exit sections (code + data) */
+static const char *const init_exit_sections[] =
+ {ALL_INIT_SECTIONS, ALL_EXIT_SECTIONS, NULL };
+
+/* all text sections */
+static const char *const text_sections[] = { ALL_TEXT_SECTIONS, NULL };
+
+/* data section */
+static const char *const data_sections[] = { DATA_SECTIONS, NULL };
+
+
+/* symbols in .data that may refer to init/exit sections */
+#define DEFAULT_SYMBOL_WHITE_LIST \
+ "*driver", \
+ "*_template", /* scsi uses *_template a lot */ \
+ "*_timer", /* arm uses ops structures named _timer a lot */ \
+ "*_sht", /* scsi also used *_sht to some extent */ \
+ "*_ops", \
+ "*_probe", \
+ "*_probe_one", \
+ "*_console"
+
+static const char *const head_sections[] = { ".head.text*", NULL };
+static const char *const linker_symbols[] =
+ { "__init_begin", "_sinittext", "_einittext", NULL };
+static const char *const optim_symbols[] = { "*.constprop.*", NULL };
+
+enum mismatch {
+ TEXT_TO_ANY_INIT,
+ DATA_TO_ANY_INIT,
+ TEXT_TO_ANY_EXIT,
+ DATA_TO_ANY_EXIT,
+ XXXINIT_TO_SOME_INIT,
+ XXXEXIT_TO_SOME_EXIT,
+ ANY_INIT_TO_ANY_EXIT,
+ ANY_EXIT_TO_ANY_INIT,
+ EXPORT_TO_INIT_EXIT,
+ EXTABLE_TO_NON_TEXT,
+};
+
+/**
+ * Describe how to match sections on different criterias:
+ *
+ * @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
+ * targetting sections in this array (white-list). Can be empty.
+ *
+ * @mismatch: Type of mismatch.
+ *
+ * @symbol_white_list: Do not match a relocation to a symbol in this list
+ * even if it is targetting a section in @bad_to_sec.
+ *
+ * @handler: Specific handler to call when a match is found. If NULL,
+ * default_mismatch_handler() will be called.
+ *
+ */
+struct sectioncheck {
+ const char *fromsec[20];
+ const char *bad_tosec[20];
+ const char *good_tosec[20];
+ enum mismatch mismatch;
+ const char *symbol_white_list[20];
+ void (*handler)(const char *modname, struct elf_info *elf,
+ const struct sectioncheck* const mismatch,
+ Elf_Rela *r, Elf_Sym *sym, const char *fromsec);
+
+};
+
+static void extable_mismatch_handler(const char *modname, struct elf_info *elf,
+ const struct sectioncheck* const mismatch,
+ Elf_Rela *r, Elf_Sym *sym,
+ const char *fromsec);
+
+static const struct sectioncheck sectioncheck[] = {
+/* Do not reference init/exit code/data from
+ * normal code and data
+ */
+{
+ .fromsec = { TEXT_SECTIONS, NULL },
+ .bad_tosec = { ALL_INIT_SECTIONS, NULL },
+ .mismatch = TEXT_TO_ANY_INIT,
+ .symbol_white_list = { DEFAULT_SYMBOL_WHITE_LIST, NULL },
+},
+{
+ .fromsec = { DATA_SECTIONS, NULL },
+ .bad_tosec = { ALL_XXXINIT_SECTIONS, NULL },
+ .mismatch = DATA_TO_ANY_INIT,
+ .symbol_white_list = { DEFAULT_SYMBOL_WHITE_LIST, NULL },
+},
+{
+ .fromsec = { DATA_SECTIONS, NULL },
+ .bad_tosec = { INIT_SECTIONS, NULL },
+ .mismatch = DATA_TO_ANY_INIT,
+ .symbol_white_list = {
+ "*_template", "*_timer", "*_sht", "*_ops",
+ "*_probe", "*_probe_one", "*_console", NULL
+ },
+},
+{
+ .fromsec = { TEXT_SECTIONS, NULL },
+ .bad_tosec = { ALL_EXIT_SECTIONS, NULL },
+ .mismatch = TEXT_TO_ANY_EXIT,
+ .symbol_white_list = { DEFAULT_SYMBOL_WHITE_LIST, NULL },
+},
+{
+ .fromsec = { DATA_SECTIONS, NULL },
+ .bad_tosec = { ALL_EXIT_SECTIONS, NULL },
+ .mismatch = DATA_TO_ANY_EXIT,
+ .symbol_white_list = { DEFAULT_SYMBOL_WHITE_LIST, NULL },
+},
+/* Do not reference init code/data from meminit code/data */
+{
+ .fromsec = { ALL_XXXINIT_SECTIONS, NULL },
+ .bad_tosec = { INIT_SECTIONS, NULL },
+ .mismatch = XXXINIT_TO_SOME_INIT,
+ .symbol_white_list = { DEFAULT_SYMBOL_WHITE_LIST, NULL },
+},
+/* Do not reference exit code/data from memexit code/data */
+{
+ .fromsec = { ALL_XXXEXIT_SECTIONS, NULL },
+ .bad_tosec = { EXIT_SECTIONS, NULL },
+ .mismatch = XXXEXIT_TO_SOME_EXIT,
+ .symbol_white_list = { DEFAULT_SYMBOL_WHITE_LIST, NULL },
+},
+/* 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,
+ .symbol_white_list = { DEFAULT_SYMBOL_WHITE_LIST, NULL },
+},
+/* 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,
+ .symbol_white_list = { DEFAULT_SYMBOL_WHITE_LIST, NULL },
+},
+{
+ .fromsec = { ALL_PCI_INIT_SECTIONS, NULL },
+ .bad_tosec = { INIT_SECTIONS, NULL },
+ .mismatch = ANY_INIT_TO_ANY_EXIT,
+ .symbol_white_list = { NULL },
+},
+/* Do not export init/exit functions or data */
+{
+ .fromsec = { "__ksymtab*", NULL },
+ .bad_tosec = { INIT_SECTIONS, EXIT_SECTIONS, NULL },
+ .mismatch = EXPORT_TO_INIT_EXIT,
+ .symbol_white_list = { DEFAULT_SYMBOL_WHITE_LIST, NULL },
+},
+{
+ .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,
+ .handler = extable_mismatch_handler,
+}
+};
+
+static const struct sectioncheck *section_mismatch(
+ const char *fromsec, const char *tosec)
+{
+ int i;
+ int elems = sizeof(sectioncheck) / sizeof(struct sectioncheck);
+ const struct sectioncheck *check = §ioncheck[0];
+
+ /*
+ * 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 < elems; 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;
+ }
+ 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 2:
+ * Many drivers utilise a *driver container with references to
+ * add, remove, probe functions etc.
+ * the pattern is identified by:
+ * tosec = init or exit section
+ * fromsec = data section
+ * atsym = *driver, *_template, *_sht, *_ops, *_probe,
+ * *probe_one, *_console, *_timer
+ *
+ * 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 struct sectioncheck *mismatch,
+ const char *fromsec, const char *fromsym,
+ const char *tosec, const char *tosym)
+{
+ /* Check for pattern 1 */
+ if (match(tosec, init_data_sections) &&
+ match(fromsec, data_sections) &&
+ strstarts(fromsym, "__param"))
+ return 0;
+
+ /* Check for pattern 1a */
+ if (strcmp(tosec, ".init.text") == 0 &&
+ match(fromsec, data_sections) &&
+ strstarts(fromsym, "__param_ops_"))
+ return 0;
+
+ /* Check for pattern 2 */
+ if (match(tosec, init_exit_sections) &&
+ match(fromsec, data_sections) &&
+ match(fromsym, mismatch->symbol_white_list))
+ return 0;
+
+ /* Check for pattern 3 */
+ if (match(fromsec, head_sections) &&
+ match(tosec, init_sections))
+ return 0;
+
+ /* Check for pattern 4 */
+ if (match(tosym, linker_symbols))
+ return 0;
+
+ /* Check for pattern 5 */
+ if (match(fromsec, text_sections) &&
+ match(tosec, init_sections) &&
+ match(fromsym, optim_symbols))
+ return 0;
+
+ return 1;
+}
+
+/**
+ * Find symbol based on relocation record info.
+ * In some cases the symbol supplied is a valid symbol so
+ * return refsym. If st_name != 0 we assume this is a valid symbol.
+ * In other cases the symbol needs to be looked up in the symbol table
+ * based on section and address.
+ * **/
+static Elf_Sym *find_elf_symbol(struct elf_info *elf, Elf64_Sword addr,
+ Elf_Sym *relsym)
+{
+ Elf_Sym *sym;
+ Elf_Sym *near = NULL;
+ Elf64_Sword distance = 20;
+ Elf64_Sword d;
+ unsigned int relsym_secindex;
+
+ if (relsym->st_name != 0)
+ return relsym;
+
+ relsym_secindex = get_secindex(elf, relsym);
+ for (sym = elf->symtab_start; sym < elf->symtab_stop; sym++) {
+ if (get_secindex(elf, sym) != relsym_secindex)
+ continue;
+ if (ELF_ST_TYPE(sym->st_info) == STT_SECTION)
+ continue;
+ if (sym->st_value == addr)
+ return sym;
+ /* Find a symbol nearby - addr are maybe negative */
+ d = sym->st_value - addr;
+ if (d < 0)
+ d = addr - sym->st_value;
+ if (d < distance) {
+ distance = d;
+ near = sym;
+ }
+ }
+ /* We need a close match */
+ if (distance < 20)
+ return near;
+ else
+ return NULL;
+}
+
+static inline int is_arm_mapping_symbol(const char *str)
+{
+ return str[0] == '$' && strchr("axtd", str[1])
+ && (str[2] == '\0' || str[2] == '.');
+}
+
+/*
+ * If there's no name there, ignore it; likewise, ignore it if it's
+ * one of the magic symbols emitted used by current ARM tools.
+ *
+ * Otherwise if find_symbols_between() returns those symbols, they'll
+ * fail the whitelist tests and cause lots of false alarms ... fixable
+ * only by merging __exit and __init sections into __text, bloating
+ * the kernel (which is especially evil on embedded platforms).
+ */
+static inline int is_valid_name(struct elf_info *elf, Elf_Sym *sym)
+{
+ const char *name = elf->strtab + sym->st_name;
+
+ if (!name || !strlen(name))
+ return 0;
+ return !is_arm_mapping_symbol(name);
+}
+
+/*
+ * Find symbols before or equal addr and after addr - in the section sec.
+ * If we find two symbols with equal offset prefer one with a valid name.
+ * The ELF format may have a better way to detect what type of symbol
+ * it is, but this works for now.
+ **/
+static Elf_Sym *find_elf_symbol2(struct elf_info *elf, Elf_Addr addr,
+ const char *sec)
+{
+ Elf_Sym *sym;
+ Elf_Sym *near = NULL;
+ Elf_Addr distance = ~0;
+
+ for (sym = elf->symtab_start; sym < elf->symtab_stop; sym++) {
+ const char *symsec;
+
+ if (is_shndx_special(sym->st_shndx))
+ continue;
+ symsec = sec_name(elf, get_secindex(elf, sym));
+ if (strcmp(symsec, sec) != 0)
+ continue;
+ if (!is_valid_name(elf, sym))
+ continue;
+ if (sym->st_value <= addr) {
+ if ((addr - sym->st_value) < distance) {
+ distance = addr - sym->st_value;
+ near = sym;
+ } else if ((addr - sym->st_value) == distance) {
+ near = sym;
+ }
+ }
+ }
+ return near;
+}
+
+/*
+ * Convert a section name to the function/data attribute
+ * .init.text => __init
+ * .memexitconst => __memconst
+ * etc.
+ *
+ * The memory of returned value has been allocated on a heap. The user of this
+ * method should free it after usage.
+*/
+static char *sec2annotation(const char *s)
+{
+ if (match(s, init_exit_sections)) {
+ char *p = NOFAIL(malloc(20));
+ char *r = p;
+
+ *p++ = '_';
+ *p++ = '_';
+ if (*s == '.')
+ s++;
+ while (*s && *s != '.')
+ *p++ = *s++;
+ *p = '\0';
+ if (*s == '.')
+ s++;
+ if (strstr(s, "rodata") != NULL)
+ strcat(p, "const ");
+ else if (strstr(s, "data") != NULL)
+ strcat(p, "data ");
+ else
+ strcat(p, " ");
+ return r;
+ } else {
+ return NOFAIL(strdup(""));
+ }
+}
+
+static int is_function(Elf_Sym *sym)
+{
+ if (sym)
+ return ELF_ST_TYPE(sym->st_info) == STT_FUNC;
+ else
+ return -1;
+}
+
+static void print_section_list(const char * const list[20])
+{
+ const char *const *s = list;
+
+ while (*s) {
+ fprintf(stderr, "%s", *s);
+ s++;
+ if (*s)
+ fprintf(stderr, ", ");
+ }
+ fprintf(stderr, "\n");
+}
+
+static inline void get_pretty_name(int is_func, const char** name, const char** name_p)
+{
+ switch (is_func) {
+ case 0: *name = "variable"; *name_p = ""; break;
+ case 1: *name = "function"; *name_p = "()"; break;
+ default: *name = "(unknown reference)"; *name_p = ""; break;
+ }
+}
+
+/*
+ * Print a warning about a section mismatch.
+ * Try to find symbols near it so user can find it.
+ * Check whitelist before warning - it may be a false positive.
+ */
+static void report_sec_mismatch(const char *modname,
+ const struct sectioncheck *mismatch,
+ const char *fromsec,
+ unsigned long long fromaddr,
+ const char *fromsym,
+ int from_is_func,
+ const char *tosec, const char *tosym,
+ int to_is_func)
+{
+ const char *from, *from_p;
+ const char *to, *to_p;
+ char *prl_from;
+ char *prl_to;
+
+ sec_mismatch_count++;
+ if (!sec_mismatch_verbose)
+ return;
+
+ get_pretty_name(from_is_func, &from, &from_p);
+ get_pretty_name(to_is_func, &to, &to_p);
+
+ warn("%s(%s+0x%llx): Section mismatch in reference from the %s %s%s "
+ "to the %s %s:%s%s\n",
+ modname, fromsec, fromaddr, from, fromsym, from_p, to, tosec,
+ tosym, to_p);
+
+ switch (mismatch->mismatch) {
+ case TEXT_TO_ANY_INIT:
+ prl_from = sec2annotation(fromsec);
+ prl_to = sec2annotation(tosec);
+ fprintf(stderr,
+ "The function %s%s() references\n"
+ "the %s %s%s%s.\n"
+ "This is often because %s lacks a %s\n"
+ "annotation or the annotation of %s is wrong.\n",
+ prl_from, fromsym,
+ to, prl_to, tosym, to_p,
+ fromsym, prl_to, tosym);
+ free(prl_from);
+ free(prl_to);
+ break;
+ case DATA_TO_ANY_INIT: {
+ prl_to = sec2annotation(tosec);
+ fprintf(stderr,
+ "The variable %s references\n"
+ "the %s %s%s%s\n"
+ "If the reference is valid then annotate the\n"
+ "variable with __init* or __refdata (see linux/init.h) "
+ "or name the variable:\n",
+ fromsym, to, prl_to, tosym, to_p);
+ print_section_list(mismatch->symbol_white_list);
+ free(prl_to);
+ break;
+ }
+ case TEXT_TO_ANY_EXIT:
+ prl_to = sec2annotation(tosec);
+ fprintf(stderr,
+ "The function %s() references a %s in an exit section.\n"
+ "Often the %s %s%s has valid usage outside the exit section\n"
+ "and the fix is to remove the %sannotation of %s.\n",
+ fromsym, to, to, tosym, to_p, prl_to, tosym);
+ free(prl_to);
+ break;
+ case DATA_TO_ANY_EXIT: {
+ prl_to = sec2annotation(tosec);
+ fprintf(stderr,
+ "The variable %s references\n"
+ "the %s %s%s%s\n"
+ "If the reference is valid then annotate the\n"
+ "variable with __exit* (see linux/init.h) or "
+ "name the variable:\n",
+ fromsym, to, prl_to, tosym, to_p);
+ print_section_list(mismatch->symbol_white_list);
+ free(prl_to);
+ break;
+ }
+ case XXXINIT_TO_SOME_INIT:
+ case XXXEXIT_TO_SOME_EXIT:
+ prl_from = sec2annotation(fromsec);
+ prl_to = sec2annotation(tosec);
+ fprintf(stderr,
+ "The %s %s%s%s references\n"
+ "a %s %s%s%s.\n"
+ "If %s is only used by %s then\n"
+ "annotate %s with a matching annotation.\n",
+ from, prl_from, fromsym, from_p,
+ to, prl_to, tosym, to_p,
+ tosym, fromsym, tosym);
+ free(prl_from);
+ free(prl_to);
+ break;
+ case ANY_INIT_TO_ANY_EXIT:
+ prl_from = sec2annotation(fromsec);
+ prl_to = sec2annotation(tosec);
+ fprintf(stderr,
+ "The %s %s%s%s references\n"
+ "a %s %s%s%s.\n"
+ "This is often seen when error handling "
+ "in the init function\n"
+ "uses functionality in the exit path.\n"
+ "The fix is often to remove the %sannotation of\n"
+ "%s%s so it may be used outside an exit section.\n",
+ from, prl_from, fromsym, from_p,
+ to, prl_to, tosym, to_p,
+ prl_to, tosym, to_p);
+ free(prl_from);
+ free(prl_to);
+ break;
+ case ANY_EXIT_TO_ANY_INIT:
+ prl_from = sec2annotation(fromsec);
+ prl_to = sec2annotation(tosec);
+ fprintf(stderr,
+ "The %s %s%s%s references\n"
+ "a %s %s%s%s.\n"
+ "This is often seen when error handling "
+ "in the exit function\n"
+ "uses functionality in the init path.\n"
+ "The fix is often to remove the %sannotation of\n"
+ "%s%s so it may be used outside an init section.\n",
+ from, prl_from, fromsym, from_p,
+ to, prl_to, tosym, to_p,
+ prl_to, tosym, to_p);
+ free(prl_from);
+ free(prl_to);
+ break;
+ case EXPORT_TO_INIT_EXIT:
+ prl_to = sec2annotation(tosec);
+ fprintf(stderr,
+ "The symbol %s is exported and annotated %s\n"
+ "Fix this by removing the %sannotation of %s "
+ "or drop the export.\n",
+ tosym, prl_to, prl_to, tosym);
+ free(prl_to);
+ break;
+ case EXTABLE_TO_NON_TEXT:
+ fatal("There's a special handler for this mismatch type, "
+ "we should never get here.");
+ break;
+ }
+ fprintf(stderr, "\n");
+}
+
+static void default_mismatch_handler(const char *modname, struct elf_info *elf,
+ const struct sectioncheck* const mismatch,
+ Elf_Rela *r, Elf_Sym *sym, const char *fromsec)
+{
+ const char *tosec;
+ Elf_Sym *to;
+ Elf_Sym *from;
+ const char *tosym;
+ const char *fromsym;
+
+ from = find_elf_symbol2(elf, r->r_offset, fromsec);
+ fromsym = sym_name(elf, from);
+
+ if (strstarts(fromsym, "reference___initcall"))
+ return;
+
+ tosec = sec_name(elf, get_secindex(elf, sym));
+ to = find_elf_symbol(elf, r->r_addend, sym);
+ tosym = sym_name(elf, to);
+
+ /* check whitelist - we may ignore it */
+ if (secref_whitelist(mismatch,
+ fromsec, fromsym, tosec, tosym)) {
+ report_sec_mismatch(modname, mismatch,
+ fromsec, r->r_offset, fromsym,
+ is_function(from), tosec, tosym,
+ is_function(to));
+ }
+}
+
+static int is_executable_section(struct elf_info* elf, unsigned int section_index)
+{
+ if (section_index > elf->num_sections)
+ fatal("section_index is outside elf->num_sections!\n");
+
+ return ((elf->sechdrs[section_index].sh_flags & SHF_EXECINSTR) == SHF_EXECINSTR);
+}
+
+/*
+ * We rely on a gross hack in section_rel[a]() calling find_extable_entry_size()
+ * to know the sizeof(struct exception_table_entry) for the target architecture.
+ */
+static unsigned int extable_entry_size = 0;
+static void find_extable_entry_size(const char* const sec, const Elf_Rela* r)
+{
+ /*
+ * If we're currently checking the second relocation within __ex_table,
+ * that relocation offset tells us the offsetof(struct
+ * exception_table_entry, fixup) which is equal to sizeof(struct
+ * exception_table_entry) divided by two. We use that to our advantage
+ * since there's no portable way to get that size as every architecture
+ * seems to go with different sized types. Not pretty but better than
+ * hard-coding the size for every architecture..
+ */
+ if (!extable_entry_size)
+ extable_entry_size = r->r_offset * 2;
+}
+
+static inline bool is_extable_fault_address(Elf_Rela *r)
+{
+ /*
+ * extable_entry_size is only discovered after we've handled the
+ * _second_ relocation in __ex_table, so only abort when we're not
+ * handling the first reloc and extable_entry_size is zero.
+ */
+ if (r->r_offset && extable_entry_size == 0)
+ fatal("extable_entry size hasn't been discovered!\n");
+
+ return ((r->r_offset == 0) ||
+ (r->r_offset % extable_entry_size == 0));
+}
+
+#define is_second_extable_reloc(Start, Cur, Sec) \
+ (((Cur) == (Start) + 1) && (strcmp("__ex_table", (Sec)) == 0))
+
+static void report_extable_warnings(const char* modname, struct elf_info* elf,
+ const struct sectioncheck* const mismatch,
+ Elf_Rela* r, Elf_Sym* sym,
+ const char* fromsec, const char* tosec)
+{
+ Elf_Sym* fromsym = find_elf_symbol2(elf, r->r_offset, fromsec);
+ const char* fromsym_name = sym_name(elf, fromsym);
+ Elf_Sym* tosym = find_elf_symbol(elf, r->r_addend, sym);
+ const char* tosym_name = sym_name(elf, tosym);
+ const char* from_pretty_name;
+ const char* from_pretty_name_p;
+ const char* to_pretty_name;
+ const char* to_pretty_name_p;
+
+ get_pretty_name(is_function(fromsym),
+ &from_pretty_name, &from_pretty_name_p);
+ get_pretty_name(is_function(tosym),
+ &to_pretty_name, &to_pretty_name_p);
+
+ warn("%s(%s+0x%lx): Section mismatch in reference"
+ " from the %s %s%s to the %s %s:%s%s\n",
+ modname, fromsec, (long)r->r_offset, from_pretty_name,
+ fromsym_name, from_pretty_name_p,
+ to_pretty_name, tosec, tosym_name, to_pretty_name_p);
+
+ if (!match(tosec, mismatch->bad_tosec) &&
+ is_executable_section(elf, get_secindex(elf, sym)))
+ fprintf(stderr,
+ "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)r->r_offset, tosec, tosec, tosec);
+}
+
+static void extable_mismatch_handler(const char* modname, struct elf_info *elf,
+ const struct sectioncheck* const mismatch,
+ Elf_Rela* r, Elf_Sym* sym,
+ const char *fromsec)
+{
+ const char* tosec = sec_name(elf, get_secindex(elf, sym));
+
+ sec_mismatch_count++;
+
+ if (sec_mismatch_verbose)
+ report_extable_warnings(modname, elf, mismatch, r, sym,
+ fromsec, tosec);
+
+ 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)r->r_offset, tosec, modname);
+ else if (!is_executable_section(elf, get_secindex(elf, sym))) {
+ if (is_extable_fault_address(r))
+ fatal("The relocation at %s+0x%lx references\n"
+ "section \"%s\" which is not executable, IOW\n"
+ "it is not possible for the kernel to fault\n"
+ "at that address. Something is seriously wrong\n"
+ "and should be fixed.\n",
+ fromsec, (long)r->r_offset, tosec);
+ else
+ fatal("The relocation at %s+0x%lx references\n"
+ "section \"%s\" which is not executable, IOW\n"
+ "the kernel will fault if it ever tries to\n"
+ "jump to it. Something is seriously wrong\n"
+ "and should be fixed.\n",
+ fromsec, (long)r->r_offset, tosec);
+ }
+}
+
+static void check_section_mismatch(const char *modname, struct elf_info *elf,
+ Elf_Rela *r, Elf_Sym *sym, const char *fromsec)
+{
+ const char *tosec = sec_name(elf, get_secindex(elf, sym));
+ const struct sectioncheck *mismatch = section_mismatch(fromsec, tosec);
+
+ if (mismatch) {
+ if (mismatch->handler)
+ mismatch->handler(modname, elf, mismatch,
+ r, sym, fromsec);
+ else
+ default_mismatch_handler(modname, elf, mismatch,
+ r, sym, fromsec);
+ }
+}
+
+static unsigned int *reloc_location(struct elf_info *elf,
+ Elf_Shdr *sechdr, Elf_Rela *r)
+{
+ Elf_Shdr *sechdrs = elf->sechdrs;
+ int section = sechdr->sh_info;
+
+ return (void *)elf->hdr + sechdrs[section].sh_offset +
+ r->r_offset;
+}
+
+static int addend_386_rel(struct elf_info *elf, Elf_Shdr *sechdr, Elf_Rela *r)
+{
+ unsigned int r_typ = ELF_R_TYPE(r->r_info);
+ unsigned int *location = reloc_location(elf, sechdr, r);
+
+ switch (r_typ) {
+ case R_386_32:
+ r->r_addend = TO_NATIVE(*location);
+ break;
+ case R_386_PC32:
+ r->r_addend = TO_NATIVE(*location) + 4;
+ /* For CONFIG_RELOCATABLE=y */
+ if (elf->hdr->e_type == ET_EXEC)
+ r->r_addend += r->r_offset;
+ break;
+ }
+ return 0;
+}
+
+#ifndef R_ARM_CALL
+#define R_ARM_CALL 28
+#endif
+#ifndef R_ARM_JUMP24
+#define R_ARM_JUMP24 29
+#endif
+
+#ifndef R_ARM_THM_CALL
+#define R_ARM_THM_CALL 10
+#endif
+#ifndef R_ARM_THM_JUMP24
+#define R_ARM_THM_JUMP24 30
+#endif
+#ifndef R_ARM_THM_JUMP19
+#define R_ARM_THM_JUMP19 51
+#endif
+
+static int addend_arm_rel(struct elf_info *elf, Elf_Shdr *sechdr, Elf_Rela *r)
+{
+ unsigned int r_typ = ELF_R_TYPE(r->r_info);
+
+ switch (r_typ) {
+ case R_ARM_ABS32:
+ /* From ARM ABI: (S + A) | T */
+ r->r_addend = (int)(long)
+ (elf->symtab_start + ELF_R_SYM(r->r_info));
+ break;
+ case R_ARM_PC24:
+ case R_ARM_CALL:
+ case R_ARM_JUMP24:
+ case R_ARM_THM_CALL:
+ case R_ARM_THM_JUMP24:
+ case R_ARM_THM_JUMP19:
+ /* From ARM ABI: ((S + A) | T) - P */
+ r->r_addend = (int)(long)(elf->hdr +
+ sechdr->sh_offset +
+ (r->r_offset - sechdr->sh_addr));
+ break;
+ default:
+ return 1;
+ }
+ return 0;
+}
+
+static int addend_mips_rel(struct elf_info *elf, Elf_Shdr *sechdr, Elf_Rela *r)
+{
+ unsigned int r_typ = ELF_R_TYPE(r->r_info);
+ unsigned int *location = reloc_location(elf, sechdr, r);
+ unsigned int inst;
+
+ if (r_typ == R_MIPS_HI16)
+ return 1; /* skip this */
+ inst = TO_NATIVE(*location);
+ switch (r_typ) {
+ case R_MIPS_LO16:
+ r->r_addend = inst & 0xffff;
+ break;
+ case R_MIPS_26:
+ r->r_addend = (inst & 0x03ffffff) << 2;
+ break;
+ case R_MIPS_32:
+ r->r_addend = inst;
+ break;
+ }
+ return 0;
+}
+
+static void section_rela(const char *modname, struct elf_info *elf,
+ Elf_Shdr *sechdr)
+{
+ Elf_Sym *sym;
+ Elf_Rela *rela;
+ Elf_Rela r;
+ unsigned int r_sym;
+ const char *fromsec;
+
+ Elf_Rela *start = (void *)elf->hdr + sechdr->sh_offset;
+ Elf_Rela *stop = (void *)start + sechdr->sh_size;
+
+ fromsec = sech_name(elf, sechdr);
+ fromsec += strlen(".rela");
+ /* if from section (name) is know good then skip it */
+ if (match(fromsec, section_white_list))
+ return;
+
+ for (rela = start; rela < stop; rela++) {
+ r.r_offset = TO_NATIVE(rela->r_offset);
+#if KERNEL_ELFCLASS == ELFCLASS64
+ if (elf->hdr->e_machine == EM_MIPS) {
+ unsigned int r_typ;
+ r_sym = ELF64_MIPS_R_SYM(rela->r_info);
+ r_sym = TO_NATIVE(r_sym);
+ r_typ = ELF64_MIPS_R_TYPE(rela->r_info);
+ r.r_info = ELF64_R_INFO(r_sym, r_typ);
+ } else {
+ r.r_info = TO_NATIVE(rela->r_info);
+ r_sym = ELF_R_SYM(r.r_info);
+ }
+#else
+ r.r_info = TO_NATIVE(rela->r_info);
+ r_sym = ELF_R_SYM(r.r_info);
+#endif
+ r.r_addend = TO_NATIVE(rela->r_addend);
+ sym = elf->symtab_start + r_sym;
+ /* Skip special sections */
+ if (is_shndx_special(sym->st_shndx))
+ continue;
+ if (is_second_extable_reloc(start, rela, fromsec))
+ find_extable_entry_size(fromsec, &r);
+ check_section_mismatch(modname, elf, &r, sym, fromsec);
+ }
+}
+
+static void section_rel(const char *modname, struct elf_info *elf,
+ Elf_Shdr *sechdr)
+{
+ Elf_Sym *sym;
+ Elf_Rel *rel;
+ Elf_Rela r;
+ unsigned int r_sym;
+ const char *fromsec;
+
+ Elf_Rel *start = (void *)elf->hdr + sechdr->sh_offset;
+ Elf_Rel *stop = (void *)start + sechdr->sh_size;
+
+ fromsec = sech_name(elf, sechdr);
+ fromsec += strlen(".rel");
+ /* if from section (name) is know good then skip it */
+ if (match(fromsec, section_white_list))
+ return;
+
+ for (rel = start; rel < stop; rel++) {
+ r.r_offset = TO_NATIVE(rel->r_offset);
+#if KERNEL_ELFCLASS == ELFCLASS64
+ if (elf->hdr->e_machine == EM_MIPS) {
+ unsigned int r_typ;
+ r_sym = ELF64_MIPS_R_SYM(rel->r_info);
+ r_sym = TO_NATIVE(r_sym);
+ r_typ = ELF64_MIPS_R_TYPE(rel->r_info);
+ r.r_info = ELF64_R_INFO(r_sym, r_typ);
+ } else {
+ r.r_info = TO_NATIVE(rel->r_info);
+ r_sym = ELF_R_SYM(r.r_info);
+ }
+#else
+ r.r_info = TO_NATIVE(rel->r_info);
+ r_sym = ELF_R_SYM(r.r_info);
+#endif
+ r.r_addend = 0;
+ switch (elf->hdr->e_machine) {
+ case EM_386:
+ if (addend_386_rel(elf, sechdr, &r))
+ continue;
+ break;
+ case EM_ARM:
+ if (addend_arm_rel(elf, sechdr, &r))
+ continue;
+ break;
+ case EM_MIPS:
+ if (addend_mips_rel(elf, sechdr, &r))
+ continue;
+ break;
+ }
+ sym = elf->symtab_start + r_sym;
+ /* Skip special sections */
+ if (is_shndx_special(sym->st_shndx))
+ continue;
+ if (is_second_extable_reloc(start, rel, fromsec))
+ find_extable_entry_size(fromsec, &r);
+ check_section_mismatch(modname, elf, &r, sym, fromsec);
+ }
+}
+
+/**
+ * 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, const char *modname,
+ struct elf_info *elf)
+{
+ int i;
+ Elf_Shdr *sechdrs = elf->sechdrs;
+
+ /* Walk through all sections */
+ for (i = 0; i < elf->num_sections; i++) {
+ check_section(modname, elf, &elf->sechdrs[i]);
+ /* We want to process only relocation sections and not .init */
+ if (sechdrs[i].sh_type == SHT_RELA)
+ section_rela(modname, elf, &elf->sechdrs[i]);
+ else if (sechdrs[i].sh_type == SHT_REL)
+ section_rel(modname, elf, &elf->sechdrs[i]);
+ }
+}
+
+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] == '.' || s[n + m] == 0))
+ s[n] = 0;
+ }
+ return s;
+}
+
+static void read_symbols(const char *modname)
+{
+ const char *symname;
+ char *version;
+ char *license;
+ struct module *mod;
+ struct elf_info info = { };
+ Elf_Sym *sym;
+
+ if (!parse_elf(&info, modname))
+ return;
+
+ mod = new_module(modname);
+
+ /* When there's no vmlinux, don't print warnings about
+ * unresolved symbols (since there'll be too many ;) */
+ if (is_vmlinux(modname)) {
+ have_vmlinux = 1;
+ mod->skip = 1;
+ }
+
+ license = get_modinfo(&info, "license");
+ if (!license && !is_vmlinux(modname))
+ warn("modpost: missing MODULE_LICENSE() in %s\n"
+ "see include/linux/module.h for "
+ "more information\n", modname);
+ while (license) {
+ if (license_is_gpl_compatible(license))
+ mod->gpl_compatible = 1;
+ else {
+ mod->gpl_compatible = 0;
+ break;
+ }
+ license = get_next_modinfo(&info, "license", license);
+ }
+
+ for (sym = info.symtab_start; sym < info.symtab_stop; sym++) {
+ symname = remove_dot(info.strtab + sym->st_name);
+
+ handle_modversions(mod, &info, sym, symname);
+ handle_moddevtable(mod, &info, sym, symname);
+ }
+ if (!is_vmlinux(modname) || vmlinux_section_warnings)
+ check_sec_ref(mod, modname, &info);
+
+ version = get_modinfo(&info, "version");
+ if (version)
+ maybe_frob_rcs_version(modname, version, info.modinfo,
+ version - (char *)info.hdr);
+ if (version || (all_versions && !is_vmlinux(modname)))
+ get_src_version(modname, mod->srcversion,
+ sizeof(mod->srcversion)-1);
+
+ parse_elf_finish(&info);
+
+ /* 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 */
+ if (modversions)
+ mod->unres = alloc_symbol("module_layout", 0, mod->unres);
+}
+
+static void read_symbols_from_files(const char *filename)
+{
+ FILE *in = stdin;
+ char fname[PATH_MAX];
+
+ if (strcmp(filename, "-") != 0) {
+ 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);
+ }
+
+ if (in != stdin)
+ 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);
+ buf_write(buf, tmp, len);
+ va_end(ap);
+}
+
+void buf_write(struct buffer *buf, const char *s, int len)
+{
+ if (buf->size - buf->pos < len) {
+ buf->size += len + SZ;
+ buf->p = NOFAIL(realloc(buf->p, buf->size));
+ }
+ strncpy(buf->p + buf->pos, s, len);
+ buf->pos += len;
+}
+
+static void check_for_gpl_usage(enum export exp, const char *m, const char *s)
+{
+ const char *e = is_vmlinux(m) ?"":".ko";
+
+ switch (exp) {
+ case export_gpl:
+ fatal("modpost: GPL-incompatible module %s%s "
+ "uses GPL-only symbol '%s'\n", m, e, s);
+ break;
+ case export_unused_gpl:
+ fatal("modpost: GPL-incompatible module %s%s "
+ "uses GPL-only symbol marked UNUSED '%s'\n", m, e, s);
+ break;
+ case export_gpl_future:
+ warn("modpost: GPL-incompatible module %s%s "
+ "uses future GPL-only symbol '%s'\n", m, e, s);
+ break;
+ case export_plain:
+ case export_unused:
+ case export_unknown:
+ /* ignore */
+ break;
+ }
+}
+
+static void check_for_unused(enum export exp, const char *m, const char *s)
+{
+ const char *e = is_vmlinux(m) ?"":".ko";
+
+ switch (exp) {
+ case export_unused:
+ case export_unused_gpl:
+ warn("modpost: module %s%s "
+ "uses symbol '%s' marked UNUSED\n", m, e, s);
+ break;
+ default:
+ /* ignore */
+ break;
+ }
+}
+
+static void check_exports(struct module *mod)
+{
+ struct symbol *s, *exp;
+
+ for (s = mod->unres; s; s = s->next) {
+ const char *basename;
+ exp = find_symbol(s->name);
+ if (!exp || exp->module == mod)
+ continue;
+ basename = strrchr(mod->name, '/');
+ if (basename)
+ basename++;
+ else
+ basename = mod->name;
+ if (!mod->gpl_compatible)
+ check_for_gpl_usage(exp->export, basename, exp->name);
+ check_for_unused(exp->export, basename, exp->name);
+ }
+}
+
+static int check_modname_len(struct module *mod)
+{
+ const char *mod_name;
+
+ mod_name = strrchr(mod->name, '/');
+ if (mod_name == NULL)
+ mod_name = mod->name;
+ else
+ mod_name++;
+ if (strlen(mod_name) >= MODULE_NAME_LEN) {
+ merror("module name is too long [%s.ko]\n", mod->name);
+ return 1;
+ }
+
+ return 0;
+}
+
+/**
+ * Header for the generated file
+ **/
+static void add_header(struct buffer *b, struct module *mod)
+{
+ buf_printf(b, "#include <linux/build-salt.h>\n");
+ buf_printf(b, "#include <linux/module.h>\n");
+ buf_printf(b, "#include <linux/vermagic.h>\n");
+ buf_printf(b, "#include <linux/compiler.h>\n");
+ buf_printf(b, "\n");
+ buf_printf(b, "BUILD_SALT;\n");
+ buf_printf(b, "\n");
+ buf_printf(b, "MODULE_INFO(vermagic, VERMAGIC_STRING);\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, "__attribute__((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");
+}
+
+static void add_intree_flag(struct buffer *b, int is_intree)
+{
+ if (is_intree)
+ buf_printf(b, "\nMODULE_INFO(intree, \"Y\");\n");
+}
+
+/* Cannot check for assembler */
+static void add_retpoline(struct buffer *b)
+{
+ buf_printf(b, "\n#ifdef RETPOLINE\n");
+ buf_printf(b, "MODULE_INFO(retpoline, \"Y\");\n");
+ buf_printf(b, "#endif\n");
+}
+
+static void add_staging_flag(struct buffer *b, const char *name)
+{
+ if (strstarts(name, "drivers/staging"))
+ buf_printf(b, "\nMODULE_INFO(staging, \"Y\");\n");
+}
+
+/**
+ * Record CRCs for unresolved symbols
+ **/
+static int add_versions(struct buffer *b, struct module *mod)
+{
+ struct symbol *s, *exp;
+ int err = 0;
+
+ for (s = mod->unres; s; s = s->next) {
+ exp = find_symbol(s->name);
+ if (!exp || exp->module == mod) {
+ if (have_vmlinux && !s->weak) {
+ if (warn_unresolved) {
+ warn("\"%s\" [%s.ko] undefined!\n",
+ s->name, mod->name);
+ } else {
+ merror("\"%s\" [%s.ko] undefined!\n",
+ s->name, mod->name);
+ err = 1;
+ }
+ }
+ continue;
+ }
+ s->module = exp->module;
+ s->crc_valid = exp->crc_valid;
+ s->crc = exp->crc;
+ }
+
+ if (!modversions)
+ return err;
+
+ buf_printf(b, "\n");
+ buf_printf(b, "static const struct modversion_info ____versions[]\n");
+ buf_printf(b, "__used\n");
+ buf_printf(b, "__attribute__((section(\"__versions\"))) = {\n");
+
+ for (s = mod->unres; s; s = s->next) {
+ if (!s->module)
+ continue;
+ if (!s->crc_valid) {
+ warn("\"%s\" [%s.ko] has no CRC!\n",
+ s->name, mod->name);
+ continue;
+ }
+ if (strlen(s->name) >= MODULE_NAME_LEN) {
+ merror("too long symbol \"%s\" [%s.ko]\n",
+ s->name, mod->name);
+ err = 1;
+ break;
+ }
+ buf_printf(b, "\t{ %#8x, \"%s\" },\n",
+ s->crc, s->name);
+ }
+
+ buf_printf(b, "};\n");
+
+ return err;
+}
+
+static void add_depends(struct buffer *b, struct module *mod,
+ struct module *modules)
+{
+ struct symbol *s;
+ struct module *m;
+ int first = 1;
+
+ for (m = modules; m; m = m->next)
+ m->seen = is_vmlinux(m->name);
+
+ buf_printf(b, "\n");
+ buf_printf(b, "static const char __module_depends[]\n");
+ buf_printf(b, "__used\n");
+ buf_printf(b, "__attribute__((section(\".modinfo\"))) =\n");
+ buf_printf(b, "\"depends=");
+ for (s = mod->unres; s; s = s->next) {
+ const char *p;
+ if (!s->module)
+ continue;
+
+ if (s->module->seen)
+ continue;
+
+ s->module->seen = 1;
+ p = strrchr(s->module->name, '/');
+ if (p)
+ p++;
+ else
+ p = 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_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 = NOFAIL(malloc(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:
+ file = fopen(fname, "w");
+ if (!file) {
+ perror(fname);
+ exit(1);
+ }
+ if (fwrite(b->p, 1, b->pos, file) != b->pos) {
+ perror(fname);
+ exit(1);
+ }
+ fclose(file);
+}
+
+/* parse Module.symvers file. line format:
+ * 0x12345678<tab>symbol<tab>module[[<tab>export]<tab>something]
+ **/
+static void read_dump(const char *fname, unsigned int kernel)
+{
+ unsigned long size, pos = 0;
+ void *file = grab_file(fname, &size);
+ char *line;
+
+ if (!file)
+ /* No symbol versions, silently ignore */
+ return;
+
+ while ((line = get_next_line(&pos, file, size))) {
+ char *symname, *modname, *d, *export, *end;
+ unsigned int crc;
+ struct module *mod;
+ struct symbol *s;
+
+ if (!(symname = strchr(line, '\t')))
+ goto fail;
+ *symname++ = '\0';
+ if (!(modname = strchr(symname, '\t')))
+ goto fail;
+ *modname++ = '\0';
+ if ((export = strchr(modname, '\t')) != NULL)
+ *export++ = '\0';
+ if (export && ((end = strchr(export, '\t')) != NULL))
+ *end = '\0';
+ crc = strtoul(line, &d, 16);
+ if (*symname == '\0' || *modname == '\0' || *d != '\0')
+ goto fail;
+ mod = find_module(modname);
+ if (!mod) {
+ if (is_vmlinux(modname))
+ have_vmlinux = 1;
+ mod = new_module(modname);
+ mod->skip = 1;
+ }
+ s = sym_add_exported(symname, mod, export_no(export));
+ s->kernel = kernel;
+ s->preloaded = 1;
+ sym_update_crc(symname, mod, crc, export_no(export));
+ }
+ release_file(file, size);
+ return;
+fail:
+ release_file(file, size);
+ fatal("parse error in symbol dump file\n");
+}
+
+/* For normal builds always dump all symbols.
+ * For external modules only dump symbols
+ * that are not read from kernel Module.symvers.
+ **/
+static int dump_sym(struct symbol *sym)
+{
+ if (!external_module)
+ return 1;
+ if (sym->vmlinux || sym->kernel)
+ return 0;
+ return 1;
+}
+
+static void write_dump(const char *fname)
+{
+ struct buffer buf = { };
+ struct symbol *symbol;
+ int n;
+
+ for (n = 0; n < SYMBOL_HASH_SIZE ; n++) {
+ symbol = symbolhash[n];
+ while (symbol) {
+ if (dump_sym(symbol))
+ buf_printf(&buf, "0x%08x\t%s\t%s\t%s\n",
+ symbol->crc, symbol->name,
+ symbol->module->name,
+ export_str(symbol->export));
+ symbol = symbol->next;
+ }
+ }
+ write_if_changed(&buf, fname);
+ free(buf.p);
+}
+
+struct ext_sym_list {
+ struct ext_sym_list *next;
+ const char *file;
+};
+
+int main(int argc, char **argv)
+{
+ struct module *mod;
+ struct buffer buf = { };
+ char *kernel_read = NULL, *module_read = NULL;
+ char *dump_write = NULL, *files_source = NULL;
+ int opt;
+ int err;
+ struct ext_sym_list *extsym_iter;
+ struct ext_sym_list *extsym_start = NULL;
+
+ while ((opt = getopt(argc, argv, "i:I:e:mnsST:o:awM:K:E")) != -1) {
+ switch (opt) {
+ case 'i':
+ kernel_read = optarg;
+ break;
+ case 'I':
+ module_read = optarg;
+ external_module = 1;
+ break;
+ case 'e':
+ external_module = 1;
+ extsym_iter =
+ NOFAIL(malloc(sizeof(*extsym_iter)));
+ extsym_iter->next = extsym_start;
+ extsym_iter->file = optarg;
+ extsym_start = extsym_iter;
+ break;
+ case 'm':
+ modversions = 1;
+ break;
+ case 'n':
+ ignore_missing_files = 1;
+ break;
+ case 'o':
+ dump_write = optarg;
+ break;
+ case 'a':
+ all_versions = 1;
+ break;
+ case 's':
+ vmlinux_section_warnings = 0;
+ break;
+ case 'S':
+ sec_mismatch_verbose = 0;
+ break;
+ case 'T':
+ files_source = optarg;
+ break;
+ case 'w':
+ warn_unresolved = 1;
+ break;
+ case 'E':
+ sec_mismatch_fatal = 1;
+ break;
+ default:
+ exit(1);
+ }
+ }
+
+ if (kernel_read)
+ read_dump(kernel_read, 1);
+ if (module_read)
+ read_dump(module_read, 0);
+ while (extsym_start) {
+ read_dump(extsym_start->file, 0);
+ extsym_iter = extsym_start->next;
+ free(extsym_start);
+ extsym_start = extsym_iter;
+ }
+
+ while (optind < argc)
+ read_symbols(argv[optind++]);
+
+ if (files_source)
+ read_symbols_from_files(files_source);
+
+ for (mod = modules; mod; mod = mod->next) {
+ if (mod->skip)
+ continue;
+ check_exports(mod);
+ }
+
+ err = 0;
+
+ for (mod = modules; mod; mod = mod->next) {
+ char fname[PATH_MAX];
+
+ if (mod->skip)
+ continue;
+
+ buf.pos = 0;
+
+ err |= check_modname_len(mod);
+ add_header(&buf, mod);
+ add_intree_flag(&buf, !external_module);
+ add_retpoline(&buf);
+ add_staging_flag(&buf, mod->name);
+ err |= add_versions(&buf, mod);
+ add_depends(&buf, mod, modules);
+ add_moddevtable(&buf, mod);
+ add_srcversion(&buf, mod);
+
+ sprintf(fname, "%s.mod.c", mod->name);
+ write_if_changed(&buf, fname);
+ }
+ if (dump_write)
+ write_dump(dump_write);
+ if (sec_mismatch_count) {
+ if (!sec_mismatch_verbose) {
+ warn("modpost: Found %d section mismatch(es).\n"
+ "To see full details build your kernel with:\n"
+ "'make CONFIG_DEBUG_SECTION_MISMATCH=y'\n",
+ sec_mismatch_count);
+ }
+ if (sec_mismatch_fatal) {
+ fatal("modpost: Section mismatches detected.\n"
+ "Set CONFIG_SECTION_MISMATCH_WARN_ONLY=y to allow them.\n");
+ }
+ }
+ free(buf.p);
+
+ return err;
+}
diff --git a/scripts/mod/modpost.h b/scripts/mod/modpost.h
new file mode 100644
index 0000000..8453d6a
--- /dev/null
+++ b/scripts/mod/modpost.h
@@ -0,0 +1,194 @@
+/* SPDX-License-Identifier: GPL-2.0 */
+#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 "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_Sword Elf64_Sword
+#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_Sword Elf64_Sxword
+#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
+
+/* The 64-bit MIPS ELF ABI uses an unusual reloc format. */
+typedef struct
+{
+ Elf32_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_type1; /* 1st relocation type */
+} _Elf64_Mips_R_Info;
+
+typedef union
+{
+ Elf64_Xword r_info_number;
+ _Elf64_Mips_R_Info r_info_fields;
+} _Elf64_Mips_R_Info_union;
+
+#define ELF64_MIPS_R_SYM(i) \
+ ((__extension__ (_Elf64_Mips_R_Info_union)(i)).r_info_fields.r_sym)
+
+#define ELF64_MIPS_R_TYPE(i) \
+ ((__extension__ (_Elf64_Mips_R_Info_union)(i)).r_info_fields.r_type1)
+
+#if KERNEL_ELFDATA != HOST_ELFDATA
+
+static inline void __endian(const void *src, void *dest, unsigned int size)
+{
+ unsigned int i;
+ for (i = 0; i < size; i++)
+ ((unsigned char*)dest)[i] = ((unsigned char*)src)[size - i-1];
+}
+
+#define TO_NATIVE(x) \
+({ \
+ typeof(x) __x; \
+ __endian(&(x), &(__x), sizeof(__x)); \
+ __x; \
+})
+
+#else /* endianness matches */
+
+#define TO_NATIVE(x) (x)
+
+#endif
+
+#define NOFAIL(ptr) do_nofail((ptr), #ptr)
+void *do_nofail(void *ptr, const char *expr);
+
+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 {
+ struct module *next;
+ const char *name;
+ int gpl_compatible;
+ struct symbol *unres;
+ int seen;
+ int skip;
+ int has_init;
+ int has_cleanup;
+ struct buffer dev_table_buf;
+ char srcversion[25];
+ int is_dot_o;
+};
+
+struct elf_info {
+ unsigned long size;
+ Elf_Ehdr *hdr;
+ Elf_Shdr *sechdrs;
+ Elf_Sym *symtab_start;
+ Elf_Sym *symtab_stop;
+ Elf_Section export_sec;
+ Elf_Section export_unused_sec;
+ Elf_Section export_gpl_sec;
+ Elf_Section export_unused_gpl_sec;
+ Elf_Section export_gpl_future_sec;
+ char *strtab;
+ char *modinfo;
+ unsigned int modinfo_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;
+};
+
+static inline int is_shndx_special(unsigned int i)
+{
+ return i != SHN_XINDEX && i >= SHN_LORESERVE && i <= SHN_HIRESERVE;
+}
+
+/*
+ * Move reserved section indices SHN_LORESERVE..SHN_HIRESERVE out of
+ * the way to -256..-1, to avoid conflicting with real section
+ * indices.
+ */
+#define SPECIAL(i) ((i) - (SHN_HIRESERVE + 1))
+
+/* 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)
+{
+ if (is_shndx_special(sym->st_shndx))
+ return SPECIAL(sym->st_shndx);
+ if (sym->st_shndx != SHN_XINDEX)
+ return sym->st_shndx;
+ return info->symtab_shndx_start[sym - info->symtab_start];
+}
+
+/* file2alias.c */
+extern unsigned int cross_build;
+void handle_moddevtable(struct module *mod, struct elf_info *info,
+ Elf_Sym *sym, const char *symname);
+void add_moddevtable(struct buffer *buf, struct module *mod);
+
+/* sumversion.c */
+void maybe_frob_rcs_version(const char *modfilename,
+ char *version,
+ void *modinfo,
+ unsigned long modinfo_offset);
+void get_src_version(const char *modname, char sum[], unsigned sumlen);
+
+/* from modpost.c */
+void *grab_file(const char *filename, unsigned long *size);
+char* get_next_line(unsigned long *pos, void *file, unsigned long size);
+void release_file(void *file, unsigned long size);
+
+void fatal(const char *fmt, ...);
+void warn(const char *fmt, ...);
+void merror(const char *fmt, ...);
diff --git a/scripts/mod/sumversion.c b/scripts/mod/sumversion.c
new file mode 100644
index 0000000..0f6dcb4
--- /dev/null
+++ b/scripts/mod/sumversion.c
@@ -0,0 +1,512 @@
+#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 "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, sizeof(ctx->block) / sizeof(uint32_t));
+ 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, sizeof(mctx->hash) / sizeof(uint32_t));
+
+ 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 = grab_file(fname, &len);
+ if (!file)
+ return 0;
+
+ 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);
+ }
+ release_file(file, len);
+ return 1;
+}
+/* Check whether the file is a static library or not */
+static int is_static_library(const char *objfile)
+{
+ int len = strlen(objfile);
+ if (objfile[len - 2] == '.' && objfile[len - 1] == 'a')
+ return 1;
+ else
+ return 0;
+}
+
+/* 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;
+ const char *base;
+ unsigned long flen, pos = 0;
+ int dirlen, ret = 0, check_files = 0;
+
+ cmd = NOFAIL(malloc(strlen(objfile) + sizeof("..cmd")));
+
+ base = strrchr(objfile, '/');
+ if (base) {
+ base++;
+ dirlen = base - objfile;
+ sprintf(cmd, "%.*s.%s.cmd", dirlen, objfile, base);
+ } else {
+ dirlen = 0;
+ sprintf(cmd, ".%s.cmd", objfile);
+ }
+ dir = NOFAIL(malloc(dirlen + 1));
+ strncpy(dir, objfile, dirlen);
+ dir[dirlen] = '\0';
+
+ file = grab_file(cmd, &flen);
+ if (!file) {
+ warn("could not find %s for %s\n", cmd, objfile);
+ goto out;
+ }
+
+ /* Sum all files in the same dir or subdirs. */
+ while ((line = get_next_line(&pos, file, flen)) != NULL) {
+ char* p = line;
+
+ if (strncmp(line, "source_", sizeof("source_")-1) == 0) {
+ 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 (strncmp(line, "deps_", sizeof("deps_")-1) == 0) {
+ 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:
+ release_file(file, flen);
+out:
+ free(dir);
+ free(cmd);
+ return ret;
+}
+
+/* Calc and record src checksum. */
+void get_src_version(const char *modname, char sum[], unsigned sumlen)
+{
+ void *file;
+ unsigned long len;
+ struct md4_ctx md;
+ char *sources, *end, *fname;
+ const char *basename;
+ char filelist[PATH_MAX + 1];
+ char *modverdir = getenv("MODVERDIR");
+
+ if (!modverdir)
+ modverdir = ".";
+
+ /* Source files for module are in .tmp_versions/modname.mod,
+ after the first line. */
+ if (strrchr(modname, '/'))
+ basename = strrchr(modname, '/') + 1;
+ else
+ basename = modname;
+ snprintf(filelist, sizeof(filelist), "%s/%.*s.mod", modverdir,
+ (int) strlen(basename) - 2, basename);
+
+ file = grab_file(filelist, &len);
+ if (!file)
+ /* not a module or .mod file missing - ignore */
+ return;
+
+ sources = strchr(file, '\n');
+ if (!sources) {
+ warn("malformed versions file for %s\n", modname);
+ goto release;
+ }
+
+ sources++;
+ end = strchr(sources, '\n');
+ if (!end) {
+ warn("bad ending versions file for %s\n", modname);
+ goto release;
+ }
+ *end = '\0';
+
+ md4_init(&md);
+ while ((fname = strsep(&sources, " ")) != NULL) {
+ if (!*fname)
+ continue;
+ if (!(is_static_library(fname)) &&
+ !parse_source_files(fname, &md))
+ goto release;
+ }
+
+ md4_final_ascii(&md, sum, sumlen);
+release:
+ release_file(file, len);
+}
+
+static void write_version(const char *filename, const char *sum,
+ unsigned long offset)
+{
+ int fd;
+
+ fd = open(filename, O_RDWR);
+ if (fd < 0) {
+ warn("changing sum in %s failed: %s\n",
+ filename, strerror(errno));
+ return;
+ }
+
+ if (lseek(fd, offset, SEEK_SET) == (off_t)-1) {
+ warn("changing sum in %s:%lu failed: %s\n",
+ filename, offset, strerror(errno));
+ goto out;
+ }
+
+ if (write(fd, sum, strlen(sum)+1) != strlen(sum)+1) {
+ warn("writing sum in %s failed: %s\n",
+ filename, strerror(errno));
+ goto out;
+ }
+out:
+ close(fd);
+}
+
+static int strip_rcs_crap(char *version)
+{
+ unsigned int len, full_len;
+
+ if (strncmp(version, "$Revision", strlen("$Revision")) != 0)
+ return 0;
+
+ /* Space for version string follows. */
+ full_len = strlen(version) + strlen(version + strlen(version) + 1) + 2;
+
+ /* Move string to start with version number: prefix will be
+ * $Revision$ or $Revision: */
+ len = strlen("$Revision");
+ if (version[len] == ':' || version[len] == '$')
+ len++;
+ while (isspace(version[len]))
+ len++;
+ memmove(version, version+len, full_len-len);
+ full_len -= len;
+
+ /* Preserve up to next whitespace. */
+ len = 0;
+ while (version[len] && !isspace(version[len]))
+ len++;
+ memmove(version + len, version + strlen(version),
+ full_len - strlen(version));
+ return 1;
+}
+
+/* Clean up RCS-style version numbers. */
+void maybe_frob_rcs_version(const char *modfilename,
+ char *version,
+ void *modinfo,
+ unsigned long version_offset)
+{
+ if (strip_rcs_crap(version))
+ write_version(modfilename, version, version_offset);
+}