1 files changed, 591 insertions, 0 deletions

diff --git a/scripts/genksyms/genksyms.c b/scripts/genksyms/genksyms.c
new file mode 100644
index 000000000000..416a694b0998
--- /dev/null
+++ b/scripts/genksyms/genksyms.c
@@ -0,0 +1,591 @@
+/* Generate kernel symbol version hashes.
+   Copyright 1996, 1997 Linux International.
+
+   New implementation contributed by Richard Henderson <rth@tamu.edu>
+   Based on original work by Bjorn Ekwall <bj0rn@blox.se>
+
+   This file was part of the Linux modutils 2.4.22: moved back into the
+   kernel sources by Rusty Russell/Kai Germaschewski.
+
+   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.
+
+   This program is distributed in the hope that it will be useful, but
+   WITHOUT ANY WARRANTY; without even the implied warranty of
+   MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the GNU
+   General Public License for more details.
+
+   You should have received a copy of the GNU General Public License
+   along with this program; if not, write to the Free Software Foundation,
+   Inc., 59 Temple Place - Suite 330, Boston, MA 02111-1307, USA.  */
+
+#include <stdio.h>
+#include <string.h>
+#include <stdlib.h>
+#include <unistd.h>
+#include <assert.h>
+#include <stdarg.h>
+#ifdef __GNU_LIBRARY__
+#include <getopt.h>
+#endif /* __GNU_LIBRARY__ */
+
+#include "genksyms.h"
+
+/*----------------------------------------------------------------------*/
+
+#define HASH_BUCKETS  4096
+
+static struct symbol *symtab[HASH_BUCKETS];
+FILE *debugfile;
+
+int cur_line = 1;
+char *cur_filename, *output_directory;
+
+int flag_debug, flag_dump_defs, flag_warnings;
+
+static int errors;
+static int nsyms;
+
+static struct symbol *expansion_trail;
+
+static const char * const symbol_type_name[] = {
+  "normal", "typedef", "enum", "struct", "union"
+};
+
+/*----------------------------------------------------------------------*/
+
+static const unsigned int crctab32[] =
+{
+  0x00000000U, 0x77073096U, 0xee0e612cU, 0x990951baU, 0x076dc419U,
+  0x706af48fU, 0xe963a535U, 0x9e6495a3U, 0x0edb8832U, 0x79dcb8a4U,
+  0xe0d5e91eU, 0x97d2d988U, 0x09b64c2bU, 0x7eb17cbdU, 0xe7b82d07U,
+  0x90bf1d91U, 0x1db71064U, 0x6ab020f2U, 0xf3b97148U, 0x84be41deU,
+  0x1adad47dU, 0x6ddde4ebU, 0xf4d4b551U, 0x83d385c7U, 0x136c9856U,
+  0x646ba8c0U, 0xfd62f97aU, 0x8a65c9ecU, 0x14015c4fU, 0x63066cd9U,
+  0xfa0f3d63U, 0x8d080df5U, 0x3b6e20c8U, 0x4c69105eU, 0xd56041e4U,
+  0xa2677172U, 0x3c03e4d1U, 0x4b04d447U, 0xd20d85fdU, 0xa50ab56bU,
+  0x35b5a8faU, 0x42b2986cU, 0xdbbbc9d6U, 0xacbcf940U, 0x32d86ce3U,
+  0x45df5c75U, 0xdcd60dcfU, 0xabd13d59U, 0x26d930acU, 0x51de003aU,
+  0xc8d75180U, 0xbfd06116U, 0x21b4f4b5U, 0x56b3c423U, 0xcfba9599U,
+  0xb8bda50fU, 0x2802b89eU, 0x5f058808U, 0xc60cd9b2U, 0xb10be924U,
+  0x2f6f7c87U, 0x58684c11U, 0xc1611dabU, 0xb6662d3dU, 0x76dc4190U,
+  0x01db7106U, 0x98d220bcU, 0xefd5102aU, 0x71b18589U, 0x06b6b51fU,
+  0x9fbfe4a5U, 0xe8b8d433U, 0x7807c9a2U, 0x0f00f934U, 0x9609a88eU,
+  0xe10e9818U, 0x7f6a0dbbU, 0x086d3d2dU, 0x91646c97U, 0xe6635c01U,
+  0x6b6b51f4U, 0x1c6c6162U, 0x856530d8U, 0xf262004eU, 0x6c0695edU,
+  0x1b01a57bU, 0x8208f4c1U, 0xf50fc457U, 0x65b0d9c6U, 0x12b7e950U,
+  0x8bbeb8eaU, 0xfcb9887cU, 0x62dd1ddfU, 0x15da2d49U, 0x8cd37cf3U,
+  0xfbd44c65U, 0x4db26158U, 0x3ab551ceU, 0xa3bc0074U, 0xd4bb30e2U,
+  0x4adfa541U, 0x3dd895d7U, 0xa4d1c46dU, 0xd3d6f4fbU, 0x4369e96aU,
+  0x346ed9fcU, 0xad678846U, 0xda60b8d0U, 0x44042d73U, 0x33031de5U,
+  0xaa0a4c5fU, 0xdd0d7cc9U, 0x5005713cU, 0x270241aaU, 0xbe0b1010U,
+  0xc90c2086U, 0x5768b525U, 0x206f85b3U, 0xb966d409U, 0xce61e49fU,
+  0x5edef90eU, 0x29d9c998U, 0xb0d09822U, 0xc7d7a8b4U, 0x59b33d17U,
+  0x2eb40d81U, 0xb7bd5c3bU, 0xc0ba6cadU, 0xedb88320U, 0x9abfb3b6U,
+  0x03b6e20cU, 0x74b1d29aU, 0xead54739U, 0x9dd277afU, 0x04db2615U,
+  0x73dc1683U, 0xe3630b12U, 0x94643b84U, 0x0d6d6a3eU, 0x7a6a5aa8U,
+  0xe40ecf0bU, 0x9309ff9dU, 0x0a00ae27U, 0x7d079eb1U, 0xf00f9344U,
+  0x8708a3d2U, 0x1e01f268U, 0x6906c2feU, 0xf762575dU, 0x806567cbU,
+  0x196c3671U, 0x6e6b06e7U, 0xfed41b76U, 0x89d32be0U, 0x10da7a5aU,
+  0x67dd4accU, 0xf9b9df6fU, 0x8ebeeff9U, 0x17b7be43U, 0x60b08ed5U,
+  0xd6d6a3e8U, 0xa1d1937eU, 0x38d8c2c4U, 0x4fdff252U, 0xd1bb67f1U,
+  0xa6bc5767U, 0x3fb506ddU, 0x48b2364bU, 0xd80d2bdaU, 0xaf0a1b4cU,
+  0x36034af6U, 0x41047a60U, 0xdf60efc3U, 0xa867df55U, 0x316e8eefU,
+  0x4669be79U, 0xcb61b38cU, 0xbc66831aU, 0x256fd2a0U, 0x5268e236U,
+  0xcc0c7795U, 0xbb0b4703U, 0x220216b9U, 0x5505262fU, 0xc5ba3bbeU,
+  0xb2bd0b28U, 0x2bb45a92U, 0x5cb36a04U, 0xc2d7ffa7U, 0xb5d0cf31U,
+  0x2cd99e8bU, 0x5bdeae1dU, 0x9b64c2b0U, 0xec63f226U, 0x756aa39cU,
+  0x026d930aU, 0x9c0906a9U, 0xeb0e363fU, 0x72076785U, 0x05005713U,
+  0x95bf4a82U, 0xe2b87a14U, 0x7bb12baeU, 0x0cb61b38U, 0x92d28e9bU,
+  0xe5d5be0dU, 0x7cdcefb7U, 0x0bdbdf21U, 0x86d3d2d4U, 0xf1d4e242U,
+  0x68ddb3f8U, 0x1fda836eU, 0x81be16cdU, 0xf6b9265bU, 0x6fb077e1U,
+  0x18b74777U, 0x88085ae6U, 0xff0f6a70U, 0x66063bcaU, 0x11010b5cU,
+  0x8f659effU, 0xf862ae69U, 0x616bffd3U, 0x166ccf45U, 0xa00ae278U,
+  0xd70dd2eeU, 0x4e048354U, 0x3903b3c2U, 0xa7672661U, 0xd06016f7U,
+  0x4969474dU, 0x3e6e77dbU, 0xaed16a4aU, 0xd9d65adcU, 0x40df0b66U,
+  0x37d83bf0U, 0xa9bcae53U, 0xdebb9ec5U, 0x47b2cf7fU, 0x30b5ffe9U,
+  0xbdbdf21cU, 0xcabac28aU, 0x53b39330U, 0x24b4a3a6U, 0xbad03605U,
+  0xcdd70693U, 0x54de5729U, 0x23d967bfU, 0xb3667a2eU, 0xc4614ab8U,
+  0x5d681b02U, 0x2a6f2b94U, 0xb40bbe37U, 0xc30c8ea1U, 0x5a05df1bU,
+  0x2d02ef8dU
+};
+
+static inline unsigned long
+partial_crc32_one(unsigned char c, unsigned long crc)
+{
+  return crctab32[(crc ^ c) & 0xff] ^ (crc >> 8);
+}
+
+static inline unsigned long
+partial_crc32(const char *s, unsigned long crc)
+{
+  while (*s)
+    crc = partial_crc32_one(*s++, crc);
+  return crc;
+}
+
+static inline unsigned long
+crc32(const char *s)
+{
+  return partial_crc32(s, 0xffffffff) ^ 0xffffffff;
+}
+
+
+/*----------------------------------------------------------------------*/
+
+static inline enum symbol_type
+map_to_ns(enum symbol_type t)
+{
+  if (t == SYM_TYPEDEF)
+    t = SYM_NORMAL;
+  else if (t == SYM_UNION)
+    t = SYM_STRUCT;
+  return t;
+}
+
+struct symbol *
+find_symbol(const char *name, enum symbol_type ns)
+{
+  unsigned long h = crc32(name) % HASH_BUCKETS;
+  struct symbol *sym;
+
+  for (sym = symtab[h]; sym ; sym = sym->hash_next)
+    if (map_to_ns(sym->type) == map_to_ns(ns) && strcmp(name, sym->name) == 0)
+      break;
+
+  return sym;
+}
+
+struct symbol *
+add_symbol(const char *name, enum symbol_type type, struct string_list *defn, int is_extern)
+{
+  unsigned long h = crc32(name) % HASH_BUCKETS;
+  struct symbol *sym;
+
+  for (sym = symtab[h]; sym ; sym = sym->hash_next)
+    if (map_to_ns(sym->type) == map_to_ns(type)
+        && strcmp(name, sym->name) == 0)
+      {
+        if (!equal_list(sym->defn, defn))
+          error_with_pos("redefinition of %s", name);
+        return sym;
+      }
+
+  sym = xmalloc(sizeof(*sym));
+  sym->name = name;
+  sym->type = type;
+  sym->defn = defn;
+  sym->expansion_trail = NULL;
+  sym->is_extern = is_extern;
+
+  sym->hash_next = symtab[h];
+  symtab[h] = sym;
+
+  if (flag_debug)
+    {
+      fprintf(debugfile, "Defn for %s %s == <", symbol_type_name[type],  name);
+      if (is_extern)
+        fputs("extern ", debugfile);
+      print_list(debugfile, defn);
+      fputs(">\n", debugfile);
+    }
+
+  ++nsyms;
+  return sym;
+}
+
+
+/*----------------------------------------------------------------------*/
+
+inline void
+free_node(struct string_list *node)
+{
+  free(node->string);
+  free(node);
+}
+
+void
+free_list(struct string_list *s, struct string_list *e)
+{
+  while (s != e)
+    {
+      struct string_list *next = s->next;
+      free_node(s);
+      s = next;
+    }
+}
+
+inline struct string_list *
+copy_node(struct string_list *node)
+{
+  struct string_list *newnode;
+
+  newnode = xmalloc(sizeof(*newnode));
+  newnode->string = xstrdup(node->string);
+  newnode->tag = node->tag;
+
+  return newnode;
+}
+
+struct string_list *
+copy_list(struct string_list *s, struct string_list *e)
+{
+  struct string_list *h, *p;
+
+  if (s == e)
+    return NULL;
+
+  p = h = copy_node(s);
+  while ((s = s->next) != e)
+    p = p->next = copy_node(s);
+  p->next = NULL;
+
+  return h;
+}
+
+int
+equal_list(struct string_list *a, struct string_list *b)
+{
+  while (a && b)
+    {
+      if (a->tag != b->tag || strcmp(a->string, b->string))
+        return 0;
+      a = a->next;
+      b = b->next;
+    }
+
+  return !a && !b;
+}
+
+static inline void
+print_node(FILE *f, struct string_list *list)
+{
+  switch (list->tag)
+    {
+    case SYM_STRUCT:
+      putc('s', f);
+      goto printit;
+    case SYM_UNION:
+      putc('u', f);
+      goto printit;
+    case SYM_ENUM:
+      putc('e', f);
+      goto printit;
+    case SYM_TYPEDEF:
+      putc('t', f);
+      goto printit;
+
+    printit:
+      putc('#', f);
+    case SYM_NORMAL:
+      fputs(list->string, f);
+      break;
+    }
+}
+
+void
+print_list(FILE *f, struct string_list *list)
+{
+  struct string_list **e, **b;
+  struct string_list *tmp, **tmp2;
+  int elem = 1;
+
+  if (list == NULL)
+    {
+      fputs("(nil)", f);
+      return;
+    }
+
+  tmp = list;
+  while((tmp = tmp->next) != NULL)
+          elem++;
+
+  b = alloca(elem * sizeof(*e));
+  e = b + elem;
+  tmp2 = e - 1;
+
+  (*tmp2--) = list;
+  while((list = list->next) != NULL)
+          *(tmp2--) = list;
+
+  while (b != e)
+    {
+      print_node(f, *b++);
+      putc(' ', f);
+    }
+}
+
+static unsigned long
+expand_and_crc_list(struct string_list *list, unsigned long crc)
+{
+  struct string_list **e, **b;
+  struct string_list *tmp, **tmp2;
+  int elem = 1;
+
+  if (!list)
+    return crc;
+
+  tmp = list;
+  while((tmp = tmp->next) != NULL)
+          elem++;
+
+  b = alloca(elem * sizeof(*e));
+  e = b + elem;
+  tmp2 = e - 1;
+
+  *(tmp2--) = list;
+  while ((list = list->next) != NULL)
+    *(tmp2--) = list;
+
+  while (b != e)
+    {
+      struct string_list *cur;
+      struct symbol *subsym;
+
+      cur = *(b++);
+      switch (cur->tag)
+        {
+        case SYM_NORMAL:
+          if (flag_dump_defs)
+            fprintf(debugfile, "%s ", cur->string);
+          crc = partial_crc32(cur->string, crc);
+          crc = partial_crc32_one(' ', crc);
+          break;
+
+        case SYM_TYPEDEF:
+          subsym = find_symbol(cur->string, cur->tag);
+          if (subsym->expansion_trail)
+            {
+              if (flag_dump_defs)
+                fprintf(debugfile, "%s ", cur->string);
+              crc = partial_crc32(cur->string, crc);
+              crc = partial_crc32_one(' ', crc);
+            }
+          else
+            {
+              subsym->expansion_trail = expansion_trail;
+              expansion_trail = subsym;
+              crc = expand_and_crc_list(subsym->defn, crc);
+            }
+          break;
+
+        case SYM_STRUCT:
+        case SYM_UNION:
+        case SYM_ENUM:
+          subsym = find_symbol(cur->string, cur->tag);
+          if (!subsym)
+            {
+              struct string_list *n, *t = NULL;
+
+              error_with_pos("expand undefined %s %s",
+                             symbol_type_name[cur->tag], cur->string);
+
+              n = xmalloc(sizeof(*n));
+              n->string = xstrdup(symbol_type_name[cur->tag]);
+              n->tag = SYM_NORMAL;
+              n->next = t;
+              t = n;
+
+              n = xmalloc(sizeof(*n));
+              n->string = xstrdup(cur->string);
+              n->tag = SYM_NORMAL;
+              n->next = t;
+              t = n;
+
+              n = xmalloc(sizeof(*n));
+              n->string = xstrdup("{ UNKNOWN }");
+              n->tag = SYM_NORMAL;
+              n->next = t;
+
+              subsym = add_symbol(cur->string, cur->tag, n, 0);
+            }
+          if (subsym->expansion_trail)
+            {
+              if (flag_dump_defs)
+                {
+                  fprintf(debugfile, "%s %s ", symbol_type_name[cur->tag],
+                          cur->string);
+                }
+
+              crc = partial_crc32(symbol_type_name[cur->tag], crc);
+              crc = partial_crc32_one(' ', crc);
+              crc = partial_crc32(cur->string, crc);
+              crc = partial_crc32_one(' ', crc);
+            }
+          else
+            {
+              subsym->expansion_trail = expansion_trail;
+              expansion_trail = subsym;
+              crc = expand_and_crc_list(subsym->defn, crc);
+            }
+          break;
+        }
+    }
+
+  return crc;
+}
+
+void
+export_symbol(const char *name)
+{
+  struct symbol *sym;
+
+  sym = find_symbol(name, SYM_NORMAL);
+  if (!sym)
+    error_with_pos("export undefined symbol %s", name);
+  else
+    {
+      unsigned long crc;
+
+      if (flag_dump_defs)
+        fprintf(debugfile, "Export %s == <", name);
+
+      expansion_trail = (struct symbol *)-1L;
+
+      crc = expand_and_crc_list(sym->defn, 0xffffffff) ^ 0xffffffff;
+
+      sym = expansion_trail;
+      while (sym != (struct symbol *)-1L)
+        {
+          struct symbol *n = sym->expansion_trail;
+          sym->expansion_trail = 0;
+          sym = n;
+        }
+
+      if (flag_dump_defs)
+        fputs(">\n", debugfile);
+
+      /* Used as a linker script. */
+      printf("__crc_%s = 0x%08lx ;\n", name, crc);
+    }
+}
+
+/*----------------------------------------------------------------------*/
+
+void
+error(const char *fmt, ...)
+{
+  va_list args;
+
+  if (flag_warnings)
+    {
+      va_start(args, fmt);
+      vfprintf(stderr, fmt, args);
+      va_end(args);
+      putc('\n', stderr);
+
+      errors++;
+    }
+}
+
+void
+error_with_pos(const char *fmt, ...)
+{
+  va_list args;
+
+  if (flag_warnings)
+    {
+      fprintf(stderr, "%s:%d: ", cur_filename ? : "<stdin>", cur_line);
+
+      va_start(args, fmt);
+      vfprintf(stderr, fmt, args);
+      va_end(args);
+      putc('\n', stderr);
+
+      errors++;
+    }
+}
+
+
+void genksyms_usage(void)
+{
+        fputs("Usage:\n"
+              "genksyms [-dDwqhV] > /path/to/.tmp_obj.ver\n"
+              "\n"
+#ifdef __GNU_LIBRARY__
+              "  -d, --debug           Increment the debug level (repeatable)\n"
+              "  -D, --dump            Dump expanded symbol defs (for debugging only)\n"
+              "  -w, --warnings        Enable warnings\n"
+              "  -q, --quiet           Disable warnings (default)\n"
+              "  -h, --help            Print this message\n"
+              "  -V, --version         Print the release version\n"
+#else  /* __GNU_LIBRARY__ */
+             "  -d                    Increment the debug level (repeatable)\n"
+             "  -D                    Dump expanded symbol defs (for debugging only)\n"
+             "  -w                    Enable warnings\n"
+             "  -q                    Disable warnings (default)\n"
+             "  -h                    Print this message\n"
+             "  -V                    Print the release version\n"
+#endif /* __GNU_LIBRARY__ */
+              , stderr);
+}
+
+int
+main(int argc, char **argv)
+{
+  int o;
+
+#ifdef __GNU_LIBRARY__
+  struct option long_opts[] = {
+    {"debug", 0, 0, 'd'},
+    {"warnings", 0, 0, 'w'},
+    {"quiet", 0, 0, 'q'},
+    {"dump", 0, 0, 'D'},
+    {"version", 0, 0, 'V'},
+    {"help", 0, 0, 'h'},
+    {0, 0, 0, 0}
+  };
+
+  while ((o = getopt_long(argc, argv, "dwqVDk:p:",
+                          &long_opts[0], NULL)) != EOF)
+#else  /* __GNU_LIBRARY__ */
+  while ((o = getopt(argc, argv, "dwqVDk:p:")) != EOF)
+#endif /* __GNU_LIBRARY__ */
+    switch (o)
+      {
+      case 'd':
+        flag_debug++;
+        break;
+      case 'w':
+        flag_warnings = 1;
+        break;
+      case 'q':
+        flag_warnings = 0;
+        break;
+      case 'V':
+        fputs("genksyms version 2.5.60\n", stderr);
+        break;
+      case 'D':
+        flag_dump_defs = 1;
+        break;
+      case 'h':
+        genksyms_usage();
+        return 0;
+      default:
+        genksyms_usage();
+        return 1;
+      }
+
+    {
+      extern int yydebug;
+      extern int yy_flex_debug;
+
+      yydebug = (flag_debug > 1);
+      yy_flex_debug = (flag_debug > 2);
+
+      debugfile = stderr;
+      /* setlinebuf(debugfile); */
+    }
+
+  yyparse();
+
+  if (flag_debug)
+    {
+      fprintf(debugfile, "Hash table occupancy %d/%d = %g\n",
+              nsyms, HASH_BUCKETS, (double)nsyms / (double)HASH_BUCKETS);
+    }
+
+  return errors != 0;
+}