1 files changed, 308 insertions, 0 deletions

diff --git a/scripts/mod/file2alias.c b/scripts/mod/file2alias.c
new file mode 100644
index 000000000000..d54b52d3bb6f
--- /dev/null
+++ b/scripts/mod/file2alias.c
@@ -0,0 +1,308 @@
+/* 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"
+
+/* 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;
+#else
+typedef Elf64_Addr	kernel_ulong_t;
+#endif
+#ifdef __sun__
+#include <inttypes.h>
+#else
+#include <stdint.h>
+#endif
+
+typedef uint32_t	__u32;
+typedef uint16_t	__u16;
+typedef unsigned char	__u8;
+
+/* 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"
+
+#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)
+
+/* Looks like "usb:vNpNdlNdhNdcNdscNdpNicNiscNipN" */
+static int do_usb_entry(const char *filename,
+			struct usb_device_id *id, char *alias)
+{
+	id->match_flags = TO_NATIVE(id->match_flags);
+	id->idVendor = TO_NATIVE(id->idVendor);
+	id->idProduct = TO_NATIVE(id->idProduct);
+	id->bcdDevice_lo = TO_NATIVE(id->bcdDevice_lo);
+	id->bcdDevice_hi = TO_NATIVE(id->bcdDevice_hi);
+
+	/*
+	 * Some modules (visor) have empty slots as placeholder for
+	 * run-time specification that results in catch-all alias
+	 */
+	if (!(id->idVendor | id->bDeviceClass | id->bInterfaceClass))
+		return 1;
+
+	strcpy(alias, "usb:");
+	ADD(alias, "v", id->match_flags&USB_DEVICE_ID_MATCH_VENDOR,
+	    id->idVendor);
+	ADD(alias, "p", id->match_flags&USB_DEVICE_ID_MATCH_PRODUCT,
+	    id->idProduct);
+	ADD(alias, "dl", id->match_flags&USB_DEVICE_ID_MATCH_DEV_LO,
+	    id->bcdDevice_lo);
+	ADD(alias, "dh", id->match_flags&USB_DEVICE_ID_MATCH_DEV_HI,
+	    id->bcdDevice_hi);
+	ADD(alias, "dc", id->match_flags&USB_DEVICE_ID_MATCH_DEV_CLASS,
+	    id->bDeviceClass);
+	ADD(alias, "dsc",
+	    id->match_flags&USB_DEVICE_ID_MATCH_DEV_SUBCLASS,
+	    id->bDeviceSubClass);
+	ADD(alias, "dp",
+	    id->match_flags&USB_DEVICE_ID_MATCH_DEV_PROTOCOL,
+	    id->bDeviceProtocol);
+	ADD(alias, "ic",
+	    id->match_flags&USB_DEVICE_ID_MATCH_INT_CLASS,
+	    id->bInterfaceClass);
+	ADD(alias, "isc",
+	    id->match_flags&USB_DEVICE_ID_MATCH_INT_SUBCLASS,
+	    id->bInterfaceSubClass);
+	ADD(alias, "ip",
+	    id->match_flags&USB_DEVICE_ID_MATCH_INT_PROTOCOL,
+	    id->bInterfaceProtocol);
+	return 1;
+}
+
+/* Looks like: ieee1394:venNmoNspNverN */
+static int do_ieee1394_entry(const char *filename,
+			     struct ieee1394_device_id *id, char *alias)
+{
+	id->match_flags = TO_NATIVE(id->match_flags);
+	id->vendor_id = TO_NATIVE(id->vendor_id);
+	id->model_id = TO_NATIVE(id->model_id);
+	id->specifier_id = TO_NATIVE(id->specifier_id);
+	id->version = TO_NATIVE(id->version);
+
+	strcpy(alias, "ieee1394:");
+	ADD(alias, "ven", id->match_flags & IEEE1394_MATCH_VENDOR_ID,
+	    id->vendor_id);
+	ADD(alias, "mo", id->match_flags & IEEE1394_MATCH_MODEL_ID,
+	    id->model_id);
+	ADD(alias, "sp", id->match_flags & IEEE1394_MATCH_SPECIFIER_ID,
+	    id->specifier_id);
+	ADD(alias, "ver", id->match_flags & IEEE1394_MATCH_VERSION,
+	    id->version);
+
+	return 1;
+}
+
+/* Looks like: pci:vNdNsvNsdNbcNscNiN. */
+static int do_pci_entry(const char *filename,
+			struct pci_device_id *id, char *alias)
+{
+	/* Class field can be divided into these three. */
+	unsigned char baseclass, subclass, interface,
+		baseclass_mask, subclass_mask, interface_mask;
+
+	id->vendor = TO_NATIVE(id->vendor);
+	id->device = TO_NATIVE(id->device);
+	id->subvendor = TO_NATIVE(id->subvendor);
+	id->subdevice = TO_NATIVE(id->subdevice);
+	id->class = TO_NATIVE(id->class);
+	id->class_mask = TO_NATIVE(id->class_mask);
+
+	strcpy(alias, "pci:");
+	ADD(alias, "v", id->vendor != PCI_ANY_ID, id->vendor);
+	ADD(alias, "d", id->device != PCI_ANY_ID, id->device);
+	ADD(alias, "sv", id->subvendor != PCI_ANY_ID, id->subvendor);
+	ADD(alias, "sd", id->subdevice != PCI_ANY_ID, id->subdevice);
+
+	baseclass = (id->class) >> 16;
+	baseclass_mask = (id->class_mask) >> 16;
+	subclass = (id->class) >> 8;
+	subclass_mask = (id->class_mask) >> 8;
+	interface = id->class;
+	interface_mask = id->class_mask;
+
+	if ((baseclass_mask != 0 && baseclass_mask != 0xFF)
+	    || (subclass_mask != 0 && subclass_mask != 0xFF)
+	    || (interface_mask != 0 && interface_mask != 0xFF)) {
+		fprintf(stderr,
+			"*** Warning: Can't handle masks in %s:%04X\n",
+			filename, id->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);
+	return 1;
+}
+
+/* looks like: "ccw:tNmNdtNdmN" */ 
+static int do_ccw_entry(const char *filename,
+			struct ccw_device_id *id, char *alias)
+{
+	id->match_flags = TO_NATIVE(id->match_flags);
+	id->cu_type = TO_NATIVE(id->cu_type);
+	id->cu_model = TO_NATIVE(id->cu_model);
+	id->dev_type = TO_NATIVE(id->dev_type);
+	id->dev_model = TO_NATIVE(id->dev_model);
+
+	strcpy(alias, "ccw:");
+	ADD(alias, "t", id->match_flags&CCW_DEVICE_ID_MATCH_CU_TYPE,
+	    id->cu_type);
+	ADD(alias, "m", id->match_flags&CCW_DEVICE_ID_MATCH_CU_MODEL,
+	    id->cu_model);
+	ADD(alias, "dt", id->match_flags&CCW_DEVICE_ID_MATCH_DEVICE_TYPE,
+	    id->dev_type);
+	ADD(alias, "dm", id->match_flags&CCW_DEVICE_ID_MATCH_DEVICE_TYPE,
+	    id->dev_model);
+	return 1;
+}
+
+/* Looks like: "serio:tyNprNidNexN" */
+static int do_serio_entry(const char *filename,
+			  struct serio_device_id *id, char *alias)
+{
+	id->type = TO_NATIVE(id->type);
+	id->proto = TO_NATIVE(id->proto);
+	id->id = TO_NATIVE(id->id);
+	id->extra = TO_NATIVE(id->extra);
+
+	strcpy(alias, "serio:");
+	ADD(alias, "ty", id->type != SERIO_ANY, id->type);
+	ADD(alias, "pr", id->proto != SERIO_ANY, id->proto);
+	ADD(alias, "id", id->id != SERIO_ANY, id->id);
+	ADD(alias, "ex", id->extra != SERIO_ANY, id->extra);
+
+	return 1;
+}
+
+/* looks like: "pnp:dD" */
+static int do_pnp_entry(const char *filename,
+			struct pnp_device_id *id, char *alias)
+{
+	sprintf(alias, "pnp:d%s", id->id);
+	return 1;
+}
+
+/* looks like: "pnp:cCdD..." */
+static int do_pnp_card_entry(const char *filename,
+			struct pnp_card_device_id *id, char *alias)
+{
+	int i;
+
+	sprintf(alias, "pnp:c%s", id->id);
+	for (i = 0; i < PNP_MAX_DEVICES; i++) {
+		if (! *id->devs[i].id)
+			break;
+		sprintf(alias + strlen(alias), "d%s", id->devs[i].id);
+	}
+	return 1;
+}
+
+/* Ignore any prefix, eg. v850 prepends _ */
+static inline int sym_is(const char *symbol, const char *name)
+{
+	const char *match;
+
+	match = strstr(symbol, name);
+	if (!match)
+		return 0;
+	return match[strlen(symbol)] == '\0';
+}
+
+static void do_table(void *symval, unsigned long size,
+		     unsigned long id_size,
+		     void *function,
+		     struct module *mod)
+{
+	unsigned int i;
+	char alias[500];
+	int (*do_entry)(const char *, void *entry, char *alias) = function;
+
+	if (size % id_size || size < id_size) {
+		fprintf(stderr, "*** Warning: %s ids %lu bad size "
+			"(each on %lu)\n", mod->name, size, id_size);
+	}
+	/* 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)) {
+			/* Always end in a wildcard, for future extension */
+			if (alias[strlen(alias)-1] != '*')
+				strcat(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;
+
+	/* We're looking for a section relative symbol */
+	if (!sym->st_shndx || sym->st_shndx >= info->hdr->e_shnum)
+		return;
+
+	symval = (void *)info->hdr
+		+ info->sechdrs[sym->st_shndx].sh_offset
+		+ sym->st_value;
+
+	if (sym_is(symname, "__mod_pci_device_table"))
+		do_table(symval, sym->st_size, sizeof(struct pci_device_id),
+			 do_pci_entry, mod);
+	else if (sym_is(symname, "__mod_usb_device_table"))
+		do_table(symval, sym->st_size, sizeof(struct usb_device_id),
+			 do_usb_entry, mod);
+	else if (sym_is(symname, "__mod_ieee1394_device_table"))
+		do_table(symval, sym->st_size, sizeof(struct ieee1394_device_id),
+			 do_ieee1394_entry, mod);
+	else if (sym_is(symname, "__mod_ccw_device_table"))
+		do_table(symval, sym->st_size, sizeof(struct ccw_device_id),
+			 do_ccw_entry, mod);
+	else if (sym_is(symname, "__mod_serio_device_table"))
+		do_table(symval, sym->st_size, sizeof(struct serio_device_id),
+			 do_serio_entry, mod);
+	else if (sym_is(symname, "__mod_pnp_device_table"))
+		do_table(symval, sym->st_size, sizeof(struct pnp_device_id),
+			 do_pnp_entry, mod);
+	else if (sym_is(symname, "__mod_pnp_card_device_table"))
+		do_table(symval, sym->st_size, sizeof(struct pnp_card_device_id),
+			 do_pnp_card_entry, mod);
+}
+
+/* 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);
+}