/* 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]; static FILE *debugfile; int cur_line = 1; char *cur_filename, *source_file; int in_source_file; static int flag_debug, flag_dump_defs, flag_reference, flag_dump_types, flag_preserve, flag_warnings; static const char *mod_prefix = ""; static int errors; static int nsyms; static struct symbol *expansion_trail; static struct symbol *visited_symbols; static const struct { int n; const char *name; } symbol_types[] = { [SYM_NORMAL] = { 0, NULL}, [SYM_TYPEDEF] = {'t', "typedef"}, [SYM_ENUM] = {'e', "enum"}, [SYM_STRUCT] = {'s', "struct"}, [SYM_UNION] = {'u', "union"}, [SYM_ENUM_CONST] = {'E', "enum constant"}, }; static int equal_list(struct string_list *a, struct string_list *b); static void print_list(FILE * f, struct string_list *list); static struct string_list *concat_list(struct string_list *start, ...); static struct string_list *mk_node(const char *string); static void print_location(void); static void print_type_name(enum symbol_type type, const char *name); /*----------------------------------------------------------------------*/ 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 unsigned long partial_crc32_one(unsigned char c, unsigned long crc) { return crctab32[(crc ^ c) & 0xff] ^ (crc >> 8); } static unsigned long partial_crc32(const char *s, unsigned long crc) { while (*s) crc = partial_crc32_one(*s++, crc); return crc; } static unsigned long crc32(const char *s) { return partial_crc32(s, 0xffffffff) ^ 0xffffffff; } /*----------------------------------------------------------------------*/ static enum symbol_type map_to_ns(enum symbol_type t) { switch (t) { case SYM_ENUM_CONST: case SYM_NORMAL: case SYM_TYPEDEF: return SYM_NORMAL; case SYM_ENUM: case SYM_STRUCT: case SYM_UNION: return SYM_STRUCT; } return t; } struct symbol *find_symbol(const char *name, enum symbol_type ns, int exact) { 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 && sym->is_declared) break; if (exact && sym && sym->type != ns) return NULL; return sym; } static int is_unknown_symbol(struct symbol *sym) { struct string_list *defn; return ((sym->type == SYM_STRUCT || sym->type == SYM_UNION || sym->type == SYM_ENUM) && (defn = sym->defn) && defn->tag == SYM_NORMAL && strcmp(defn->string, "}") == 0 && (defn = defn->next) && defn->tag == SYM_NORMAL && strcmp(defn->string, "UNKNOWN") == 0 && (defn = defn->next) && defn->tag == SYM_NORMAL && strcmp(defn->string, "{") == 0); } static struct symbol *__add_symbol(const char *name, enum symbol_type type, struct string_list *defn, int is_extern, int is_reference) { unsigned long h; struct symbol *sym; enum symbol_status status = STATUS_UNCHANGED; /* The parser adds symbols in the order their declaration completes, * so it is safe to store the value of the previous enum constant in * a static variable. */ static int enum_counter; static struct string_list *last_enum_expr; if (type == SYM_ENUM_CONST) { if (defn) { free_list(last_enum_expr, NULL); last_enum_expr = copy_list_range(defn, NULL); enum_counter = 1; } else { struct string_list *expr; char buf[20]; snprintf(buf, sizeof(buf), "%d", enum_counter++); if (last_enum_expr) { expr = copy_list_range(last_enum_expr, NULL); defn = concat_list(mk_node("("), expr, mk_node(")"), mk_node("+"), mk_node(buf), NULL); } else { defn = mk_node(buf); } } } else if (type == SYM_ENUM) { free_list(last_enum_expr, NULL); last_enum_expr = NULL; enum_counter = 0; if (!name) /* Anonymous enum definition, nothing more to do */ return NULL; } h = crc32(name) % HASH_BUCKETS; 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 (is_reference) /* fall through */ ; else if (sym->type == type && equal_list(sym->defn, defn)) { if (!sym->is_declared && sym->is_override) { print_location(); print_type_name(type, name); fprintf(stderr, " modversion is " "unchanged\n"); } sym->is_declared = 1; return sym; } else if (!sym->is_declared) { if (sym->is_override && flag_preserve) { print_location(); fprintf(stderr, "ignoring "); print_type_name(type, name); fprintf(stderr, " modversion change\n"); sym->is_declared = 1; return sym; } else { status = is_unknown_symbol(sym) ? STATUS_DEFINED : STATUS_MODIFIED; } } else { error_with_pos("redefinition of %s", name); return sym; } break; } } if (sym) { struct symbol **psym; for (psym = &symtab[h]; *psym; psym = &(*psym)->hash_next) { if (*psym == sym) { *psym = sym->hash_next; break; } } --nsyms; } sym = xmalloc(sizeof(*sym)); sym->name = name; sym->type = type; sym->defn = defn; sym->expansion_trail = NULL; sym->visited = NULL; sym->is_extern = is_extern; sym->hash_next = symtab[h]; symtab[h] = sym; sym->is_declared = !is_reference; sym->status = status; sym->is_override = 0; if (flag_debug) { if (symbol_types[type].name) fprintf(debugfile, "Defn for %s %s == <", symbol_types[type].name, name); else fprintf(debugfile, "Defn for type%d %s == <", type, name); if (is_extern) fputs("extern ", debugfile); print_list(debugfile, defn); fputs(">\n", debugfile); } ++nsyms; return sym; } struct symbol *add_symbol(const char *name, enum symbol_type type, struct string_list *defn, int is_extern) { return __add_symbol(name, type, defn, is_extern, 0); } static struct symbol *add_reference_symbol(const char *name, enum symbol_type type, struct string_list *defn, int is_extern) { return __add_symbol(name, type, defn, is_extern, 1); } /*----------------------------------------------------------------------*/ 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; } } static struct string_list *mk_node(const char *string) { struct string_list *newnode; newnode = xmalloc(sizeof(*newnode)); newnode->string = xstrdup(string); newnode->tag = SYM_NORMAL; newnode->next = NULL; return newnode; } static struct string_list *concat_list(struct string_list *start, ...) { va_list ap; struct string_list *n, *n2; if (!start) return NULL; for (va_start(ap, start); (n = va_arg(ap, struct string_list *));) { for (n2 = n; n2->next; n2 = n2->next) ; n2->next = start; start = n; } va_end(ap); return start; } 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_range(struct string_list *start, struct string_list *end) { struct string_list *res, *n; if (start == end) return NULL; n = res = copy_node(start); for (start = start->next; start != end; start = start->next) { n->next = copy_node(start); n = n->next; } n->next = NULL; return res; } static 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; } #define ARRAY_SIZE(arr) (sizeof(arr) / sizeof((arr)[0])) static struct string_list *read_node(FILE *f) { char buffer[256]; struct string_list node = { .string = buffer, .tag = SYM_NORMAL }; int c; while ((c = fgetc(f)) != EOF) { if (c == ' ') { if (node.string == buffer) continue; break; } else if (c == '\n') { if (node.string == buffer) return NULL; ungetc(c, f); break; } if (node.string >= buffer + sizeof(buffer) - 1) { fprintf(stderr, "Token too long\n"); exit(1); } *node.string++ = c; } if (node.string == buffer) return NULL; *node.string = 0; node.string = buffer; if (node.string[1] == '#') { size_t n; for (n = 0; n < ARRAY_SIZE(symbol_types); n++) { if (node.string[0] == symbol_types[n].n) { node.tag = n; node.string += 2; return copy_node(&node); } } fprintf(stderr, "Unknown type %c\n", node.string[0]); exit(1); } return copy_node(&node); } static void read_reference(FILE *f) { while (!feof(f)) { struct string_list *defn = NULL; struct string_list *sym, *def; int is_extern = 0, is_override = 0; struct symbol *subsym; sym = read_node(f); if (sym && sym->tag == SYM_NORMAL && !strcmp(sym->string, "override")) { is_override = 1; free_node(sym); sym = read_node(f); } if (!sym) continue; def = read_node(f); if (def && def->tag == SYM_NORMAL && !strcmp(def->string, "extern")) { is_extern = 1; free_node(def); def = read_node(f); } while (def) { def->next = defn; defn = def; def = read_node(f); } subsym = add_reference_symbol(xstrdup(sym->string), sym->tag, defn, is_extern); subsym->is_override = is_override; free_node(sym); } } static void print_node(FILE * f, struct string_list *list) { if (symbol_types[list->tag].n) { putc(symbol_types[list->tag].n, f); putc('#', f); } fputs(list->string, f); } static 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_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; 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_ENUM_CONST: case SYM_TYPEDEF: subsym = find_symbol(cur->string, cur->tag, 0); /* FIXME: Bad reference files can segfault here. */ 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_sym(subsym, crc); } break; case SYM_STRUCT: case SYM_UNION: case SYM_ENUM: subsym = find_symbol(cur->string, cur->tag, 0); if (!subsym) { struct string_list *n; error_with_pos("expand undefined %s %s", symbol_types[cur->tag].name, cur->string); n = concat_list(mk_node (symbol_types[cur->tag].name), mk_node(cur->string), mk_node("{"), mk_node("UNKNOWN"), mk_node("}"), NULL); subsym = add_symbol(cur->string, cur->tag, n, 0); } if (subsym->expansion_trail) { if (flag_dump_defs) { fprintf(debugfile, "%s %s ", symbol_types[cur->tag].name, cur->string); } crc = partial_crc32(symbol_types[cur->tag].name, 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_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; } void export_symbol(const char *name) { struct symbol *sym; sym = find_symbol(name, SYM_NORMAL, 0); if (!sym) error_with_pos("export undefined symbol %s", name); else { unsigned long crc; int has_changed = 0; if (flag_dump_defs) fprintf(debugfile, "Export %s == <", name); expansion_trail = (struct symbol *)-1L; sym->expansion_trail = expansion_trail; expansion_trail = sym; crc = expand_and_crc_sym(sym, 0xffffffff) ^ 0xffffffff; sym = expansion_trail; while (sym != (struct symbol *)-1L) { struct symbol *n = sym->expansion_trail; if (sym->status != STATUS_UNCHANGED) { if (!has_changed) { print_location(); fprintf(stderr, "%s: %s: modversion " "changed because of changes " "in ", flag_preserve ? "error" : "warning", name); } else fprintf(stderr, ", "); print_type_name(sym->type, sym->name); if (sym->status == STATUS_DEFINED) fprintf(stderr, " (became defined)"); has_changed = 1; if (flag_preserve) errors++; } sym->expansion_trail = 0; sym = n; } if (has_changed) fprintf(stderr, "\n"); if (flag_dump_defs) fputs(">\n", debugfile); /* Used as a linker script. */ printf("%s__crc_%s = 0x%08lx ;\n", mod_prefix, name, crc); } } /*----------------------------------------------------------------------*/ static void print_location(void) { fprintf(stderr, "%s:%d: ", cur_filename ? : "<stdin>", cur_line); } static void print_type_name(enum symbol_type type, const char *name) { if (symbol_types[type].name) fprintf(stderr, "%s %s", symbol_types[type].name, name); else fprintf(stderr, "%s", name); } void error_with_pos(const char *fmt, ...) { va_list args; if (flag_warnings) { print_location(); va_start(args, fmt); vfprintf(stderr, fmt, args); va_end(args); putc('\n', stderr); errors++; } } static void genksyms_usage(void) { fputs("Usage:\n" "genksyms [-adDTwqhV] > /path/to/.tmp_obj.ver\n" "\n" #ifdef __GNU_LIBRARY__ " -s, --symbol-prefix Select symbol prefix\n" " -d, --debug Increment the debug level (repeatable)\n" " -D, --dump Dump expanded symbol defs (for debugging only)\n" " -r, --reference file Read reference symbols from a file\n" " -T, --dump-types file Dump expanded types into file\n" " -p, --preserve Preserve reference modversions or fail\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__ */ " -s Select symbol prefix\n" " -d Increment the debug level (repeatable)\n" " -D Dump expanded symbol defs (for debugging only)\n" " -r file Read reference symbols from a file\n" " -T file Dump expanded types into file\n" " -p Preserve reference modversions or fail\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) { FILE *dumpfile = NULL, *ref_file = NULL; int o; #ifdef __GNU_LIBRARY__ struct option long_opts[] = { {"symbol-prefix", 1, 0, 's'}, {"debug", 0, 0, 'd'}, {"warnings", 0, 0, 'w'}, {"quiet", 0, 0, 'q'}, {"dump", 0, 0, 'D'}, {"reference", 1, 0, 'r'}, {"dump-types", 1, 0, 'T'}, {"preserve", 0, 0, 'p'}, {"version", 0, 0, 'V'}, {"help", 0, 0, 'h'}, {0, 0, 0, 0} }; while ((o = getopt_long(argc, argv, "s:dwqVDr:T:ph", &long_opts[0], NULL)) != EOF) #else /* __GNU_LIBRARY__ */ while ((o = getopt(argc, argv, "s:dwqVDr:T:ph")) != EOF) #endif /* __GNU_LIBRARY__ */ switch (o) { case 's': mod_prefix = optarg; break; 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 'r': flag_reference = 1; ref_file = fopen(optarg, "r"); if (!ref_file) { perror(optarg); return 1; } break; case 'T': flag_dump_types = 1; dumpfile = fopen(optarg, "w"); if (!dumpfile) { perror(optarg); return 1; } break; case 'p': flag_preserve = 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); */ } if (flag_reference) { read_reference(ref_file); fclose(ref_file); } yyparse(); if (flag_dump_types && visited_symbols) { while (visited_symbols != (struct symbol *)-1L) { struct symbol *sym = visited_symbols; if (sym->is_override) fputs("override ", dumpfile); if (symbol_types[sym->type].n) { putc(symbol_types[sym->type].n, dumpfile); putc('#', dumpfile); } fputs(sym->name, dumpfile); putc(' ', dumpfile); if (sym->is_extern) fputs("extern ", 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, (double)nsyms / (double)HASH_BUCKETS); } return errors != 0; }