kbuild: support for %.symtypes files
[linux-3.10.git] / scripts / genksyms / genksyms.c
index 5b0344e..b038182 100644 (file)
@@ -42,7 +42,7 @@ static FILE *debugfile;
 int cur_line = 1;
 char *cur_filename;
 
-static int flag_debug, flag_dump_defs, flag_warnings;
+static int flag_debug, flag_dump_defs, flag_dump_types, flag_warnings;
 static const char *arch = "";
 static const char *mod_prefix = "";
 
@@ -50,6 +50,7 @@ static int errors;
 static int nsyms;
 
 static struct symbol *expansion_trail;
+static struct symbol *visited_symbols;
 
 static const char *const symbol_type_name[] = {
        "normal", "typedef", "enum", "struct", "union"
@@ -176,6 +177,7 @@ struct symbol *add_symbol(const char *name, enum symbol_type type,
        sym->type = type;
        sym->defn = defn;
        sym->expansion_trail = NULL;
+       sym->visited = NULL;
        sym->is_extern = is_extern;
 
        sym->hash_next = symtab[h];
@@ -236,26 +238,11 @@ static int equal_list(struct string_list *a, struct string_list *b)
 
 static 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:
+       if (list->tag != SYM_NORMAL) {
+               putc(symbol_type_name[list->tag][0], f);
                putc('#', f);
-       case SYM_NORMAL:
-               fputs(list->string, f);
-               break;
        }
+       fputs(list->string, f);
 }
 
 static void print_list(FILE * f, struct string_list *list)
@@ -287,9 +274,9 @@ static void print_list(FILE * f, struct string_list *list)
        }
 }
 
-static unsigned long expand_and_crc_list(struct string_list *list,
-                                        unsigned long crc)
+static unsigned long expand_and_crc_sym(struct symbol *sym, unsigned long crc)
 {
+       struct string_list *list = sym->defn;
        struct string_list **e, **b;
        struct string_list *tmp, **tmp2;
        int elem = 1;
@@ -332,7 +319,7 @@ static unsigned long expand_and_crc_list(struct string_list *list,
                        } else {
                                subsym->expansion_trail = expansion_trail;
                                expansion_trail = subsym;
-                               crc = expand_and_crc_list(subsym->defn, crc);
+                               crc = expand_and_crc_sym(subsym, crc);
                        }
                        break;
 
@@ -382,12 +369,22 @@ static unsigned long expand_and_crc_list(struct string_list *list,
                        } else {
                                subsym->expansion_trail = expansion_trail;
                                expansion_trail = subsym;
-                               crc = expand_and_crc_list(subsym->defn, crc);
+                               crc = expand_and_crc_sym(subsym, crc);
                        }
                        break;
                }
        }
 
+       {
+               static struct symbol **end = &visited_symbols;
+
+               if (!sym->visited) {
+                       *end = sym;
+                       end = &sym->visited;
+                       sym->visited = (struct symbol *)-1L;
+               }
+       }
+
        return crc;
 }
 
@@ -406,7 +403,7 @@ void export_symbol(const char *name)
 
                expansion_trail = (struct symbol *)-1L;
 
-               crc = expand_and_crc_list(sym->defn, 0xffffffff) ^ 0xffffffff;
+               crc = expand_and_crc_sym(sym, 0xffffffff) ^ 0xffffffff;
 
                sym = expansion_trail;
                while (sym != (struct symbol *)-1L) {
@@ -464,6 +461,7 @@ static void genksyms_usage(void)
 
 int main(int argc, char **argv)
 {
+       FILE *dumpfile = NULL;
        int o;
 
 #ifdef __GNU_LIBRARY__
@@ -473,15 +471,16 @@ int main(int argc, char **argv)
                {"warnings", 0, 0, 'w'},
                {"quiet", 0, 0, 'q'},
                {"dump", 0, 0, 'D'},
+               {"dump-types", 1, 0, 'T'},
                {"version", 0, 0, 'V'},
                {"help", 0, 0, 'h'},
                {0, 0, 0, 0}
        };
 
-       while ((o = getopt_long(argc, argv, "a:dwqVDk:p:",
+       while ((o = getopt_long(argc, argv, "a:dwqVDT:k:p:",
                                &long_opts[0], NULL)) != EOF)
 #else                          /* __GNU_LIBRARY__ */
-       while ((o = getopt(argc, argv, "a:dwqVDk:p:")) != EOF)
+       while ((o = getopt(argc, argv, "a:dwqVDT:k:p:")) != EOF)
 #endif                         /* __GNU_LIBRARY__ */
                switch (o) {
                case 'a':
@@ -502,6 +501,14 @@ int main(int argc, char **argv)
                case 'D':
                        flag_dump_defs = 1;
                        break;
+               case 'T':
+                       flag_dump_types = 1;
+                       dumpfile = fopen(optarg, "w");
+                       if (!dumpfile) {
+                               perror(optarg);
+                               return 1;
+                       }
+                       break;
                case 'h':
                        genksyms_usage();
                        return 0;
@@ -524,6 +531,24 @@ int main(int argc, char **argv)
 
        yyparse();
 
+       if (flag_dump_types && visited_symbols) {
+               while (visited_symbols != (struct symbol *)-1L) {
+                       struct symbol *sym = visited_symbols;
+
+                       if (sym->type != SYM_NORMAL) {
+                               putc(symbol_type_name[sym->type][0], dumpfile);
+                               putc('#', dumpfile);
+                       }
+                       fputs(sym->name, dumpfile);
+                       putc(' ', dumpfile);
+                       print_list(dumpfile, sym->defn);
+                       putc('\n', dumpfile);
+
+                       visited_symbols = sym->visited;
+                       sym->visited = NULL;
+               }
+       }
+
        if (flag_debug) {
                fprintf(debugfile, "Hash table occupancy %d/%d = %g\n",
                        nsyms, HASH_BUCKETS,