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3b40d38120
The extern flag currently is not included in type dump files (genksyms --dump-types). Include that flag there for completeness. Signed-off-by: Andreas Gruenbacher <agruen@suse.de> Signed-off-by: Sam Ravnborg <sam@ravnborg.org>
566 lines
15 KiB
C
566 lines
15 KiB
C
/* Generate kernel symbol version hashes.
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Copyright 1996, 1997 Linux International.
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New implementation contributed by Richard Henderson <rth@tamu.edu>
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Based on original work by Bjorn Ekwall <bj0rn@blox.se>
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This file was part of the Linux modutils 2.4.22: moved back into the
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kernel sources by Rusty Russell/Kai Germaschewski.
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This program is free software; you can redistribute it and/or modify it
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under the terms of the GNU General Public License as published by the
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Free Software Foundation; either version 2 of the License, or (at your
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option) any later version.
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This program is distributed in the hope that it will be useful, but
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WITHOUT ANY WARRANTY; without even the implied warranty of
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MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
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General Public License for more details.
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You should have received a copy of the GNU General Public License
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along with this program; if not, write to the Free Software Foundation,
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Inc., 59 Temple Place - Suite 330, Boston, MA 02111-1307, USA. */
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#include <stdio.h>
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#include <string.h>
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#include <stdlib.h>
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#include <unistd.h>
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#include <assert.h>
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#include <stdarg.h>
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#ifdef __GNU_LIBRARY__
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#include <getopt.h>
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#endif /* __GNU_LIBRARY__ */
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#include "genksyms.h"
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/*----------------------------------------------------------------------*/
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#define HASH_BUCKETS 4096
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static struct symbol *symtab[HASH_BUCKETS];
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static FILE *debugfile;
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int cur_line = 1;
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char *cur_filename;
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static int flag_debug, flag_dump_defs, flag_dump_types, flag_warnings;
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static const char *arch = "";
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static const char *mod_prefix = "";
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static int errors;
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static int nsyms;
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static struct symbol *expansion_trail;
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static struct symbol *visited_symbols;
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static const char *const symbol_type_name[] = {
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"normal", "typedef", "enum", "struct", "union"
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};
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static int equal_list(struct string_list *a, struct string_list *b);
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static void print_list(FILE * f, struct string_list *list);
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/*----------------------------------------------------------------------*/
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static const unsigned int crctab32[] = {
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0x00000000U, 0x77073096U, 0xee0e612cU, 0x990951baU, 0x076dc419U,
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0x706af48fU, 0xe963a535U, 0x9e6495a3U, 0x0edb8832U, 0x79dcb8a4U,
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0xe0d5e91eU, 0x97d2d988U, 0x09b64c2bU, 0x7eb17cbdU, 0xe7b82d07U,
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0x90bf1d91U, 0x1db71064U, 0x6ab020f2U, 0xf3b97148U, 0x84be41deU,
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0x1adad47dU, 0x6ddde4ebU, 0xf4d4b551U, 0x83d385c7U, 0x136c9856U,
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0x646ba8c0U, 0xfd62f97aU, 0x8a65c9ecU, 0x14015c4fU, 0x63066cd9U,
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0xfa0f3d63U, 0x8d080df5U, 0x3b6e20c8U, 0x4c69105eU, 0xd56041e4U,
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0xa2677172U, 0x3c03e4d1U, 0x4b04d447U, 0xd20d85fdU, 0xa50ab56bU,
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0x35b5a8faU, 0x42b2986cU, 0xdbbbc9d6U, 0xacbcf940U, 0x32d86ce3U,
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0x45df5c75U, 0xdcd60dcfU, 0xabd13d59U, 0x26d930acU, 0x51de003aU,
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0xc8d75180U, 0xbfd06116U, 0x21b4f4b5U, 0x56b3c423U, 0xcfba9599U,
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0xb8bda50fU, 0x2802b89eU, 0x5f058808U, 0xc60cd9b2U, 0xb10be924U,
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0x2f6f7c87U, 0x58684c11U, 0xc1611dabU, 0xb6662d3dU, 0x76dc4190U,
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0x01db7106U, 0x98d220bcU, 0xefd5102aU, 0x71b18589U, 0x06b6b51fU,
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0x9fbfe4a5U, 0xe8b8d433U, 0x7807c9a2U, 0x0f00f934U, 0x9609a88eU,
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0xe10e9818U, 0x7f6a0dbbU, 0x086d3d2dU, 0x91646c97U, 0xe6635c01U,
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0x6b6b51f4U, 0x1c6c6162U, 0x856530d8U, 0xf262004eU, 0x6c0695edU,
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0x1b01a57bU, 0x8208f4c1U, 0xf50fc457U, 0x65b0d9c6U, 0x12b7e950U,
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0x8bbeb8eaU, 0xfcb9887cU, 0x62dd1ddfU, 0x15da2d49U, 0x8cd37cf3U,
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0xfbd44c65U, 0x4db26158U, 0x3ab551ceU, 0xa3bc0074U, 0xd4bb30e2U,
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0x4adfa541U, 0x3dd895d7U, 0xa4d1c46dU, 0xd3d6f4fbU, 0x4369e96aU,
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0x346ed9fcU, 0xad678846U, 0xda60b8d0U, 0x44042d73U, 0x33031de5U,
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0xaa0a4c5fU, 0xdd0d7cc9U, 0x5005713cU, 0x270241aaU, 0xbe0b1010U,
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0xc90c2086U, 0x5768b525U, 0x206f85b3U, 0xb966d409U, 0xce61e49fU,
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0x5edef90eU, 0x29d9c998U, 0xb0d09822U, 0xc7d7a8b4U, 0x59b33d17U,
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0x2eb40d81U, 0xb7bd5c3bU, 0xc0ba6cadU, 0xedb88320U, 0x9abfb3b6U,
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0x03b6e20cU, 0x74b1d29aU, 0xead54739U, 0x9dd277afU, 0x04db2615U,
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0x73dc1683U, 0xe3630b12U, 0x94643b84U, 0x0d6d6a3eU, 0x7a6a5aa8U,
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0xe40ecf0bU, 0x9309ff9dU, 0x0a00ae27U, 0x7d079eb1U, 0xf00f9344U,
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0x8708a3d2U, 0x1e01f268U, 0x6906c2feU, 0xf762575dU, 0x806567cbU,
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0x196c3671U, 0x6e6b06e7U, 0xfed41b76U, 0x89d32be0U, 0x10da7a5aU,
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0x67dd4accU, 0xf9b9df6fU, 0x8ebeeff9U, 0x17b7be43U, 0x60b08ed5U,
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0xd6d6a3e8U, 0xa1d1937eU, 0x38d8c2c4U, 0x4fdff252U, 0xd1bb67f1U,
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0xa6bc5767U, 0x3fb506ddU, 0x48b2364bU, 0xd80d2bdaU, 0xaf0a1b4cU,
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0x36034af6U, 0x41047a60U, 0xdf60efc3U, 0xa867df55U, 0x316e8eefU,
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0x4669be79U, 0xcb61b38cU, 0xbc66831aU, 0x256fd2a0U, 0x5268e236U,
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0xcc0c7795U, 0xbb0b4703U, 0x220216b9U, 0x5505262fU, 0xc5ba3bbeU,
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0xb2bd0b28U, 0x2bb45a92U, 0x5cb36a04U, 0xc2d7ffa7U, 0xb5d0cf31U,
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0x2cd99e8bU, 0x5bdeae1dU, 0x9b64c2b0U, 0xec63f226U, 0x756aa39cU,
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0x026d930aU, 0x9c0906a9U, 0xeb0e363fU, 0x72076785U, 0x05005713U,
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0x95bf4a82U, 0xe2b87a14U, 0x7bb12baeU, 0x0cb61b38U, 0x92d28e9bU,
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0xe5d5be0dU, 0x7cdcefb7U, 0x0bdbdf21U, 0x86d3d2d4U, 0xf1d4e242U,
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0x68ddb3f8U, 0x1fda836eU, 0x81be16cdU, 0xf6b9265bU, 0x6fb077e1U,
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0x18b74777U, 0x88085ae6U, 0xff0f6a70U, 0x66063bcaU, 0x11010b5cU,
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0x8f659effU, 0xf862ae69U, 0x616bffd3U, 0x166ccf45U, 0xa00ae278U,
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0xd70dd2eeU, 0x4e048354U, 0x3903b3c2U, 0xa7672661U, 0xd06016f7U,
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0x4969474dU, 0x3e6e77dbU, 0xaed16a4aU, 0xd9d65adcU, 0x40df0b66U,
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0x37d83bf0U, 0xa9bcae53U, 0xdebb9ec5U, 0x47b2cf7fU, 0x30b5ffe9U,
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0xbdbdf21cU, 0xcabac28aU, 0x53b39330U, 0x24b4a3a6U, 0xbad03605U,
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0xcdd70693U, 0x54de5729U, 0x23d967bfU, 0xb3667a2eU, 0xc4614ab8U,
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0x5d681b02U, 0x2a6f2b94U, 0xb40bbe37U, 0xc30c8ea1U, 0x5a05df1bU,
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0x2d02ef8dU
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};
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static unsigned long partial_crc32_one(unsigned char c, unsigned long crc)
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{
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return crctab32[(crc ^ c) & 0xff] ^ (crc >> 8);
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}
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static unsigned long partial_crc32(const char *s, unsigned long crc)
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{
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while (*s)
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crc = partial_crc32_one(*s++, crc);
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return crc;
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}
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static unsigned long crc32(const char *s)
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{
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return partial_crc32(s, 0xffffffff) ^ 0xffffffff;
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}
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/*----------------------------------------------------------------------*/
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static enum symbol_type map_to_ns(enum symbol_type t)
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{
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if (t == SYM_TYPEDEF)
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t = SYM_NORMAL;
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else if (t == SYM_UNION)
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t = SYM_STRUCT;
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return t;
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}
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struct symbol *find_symbol(const char *name, enum symbol_type ns)
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{
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unsigned long h = crc32(name) % HASH_BUCKETS;
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struct symbol *sym;
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for (sym = symtab[h]; sym; sym = sym->hash_next)
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if (map_to_ns(sym->type) == map_to_ns(ns) &&
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strcmp(name, sym->name) == 0)
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break;
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return sym;
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}
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struct symbol *add_symbol(const char *name, enum symbol_type type,
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struct string_list *defn, int is_extern)
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{
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unsigned long h = crc32(name) % HASH_BUCKETS;
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struct symbol *sym;
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for (sym = symtab[h]; sym; sym = sym->hash_next) {
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if (map_to_ns(sym->type) == map_to_ns(type)
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&& strcmp(name, sym->name) == 0) {
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if (!equal_list(sym->defn, defn))
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error_with_pos("redefinition of %s", name);
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return sym;
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}
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}
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sym = xmalloc(sizeof(*sym));
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sym->name = name;
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sym->type = type;
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sym->defn = defn;
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sym->expansion_trail = NULL;
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sym->visited = NULL;
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sym->is_extern = is_extern;
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sym->hash_next = symtab[h];
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symtab[h] = sym;
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if (flag_debug) {
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fprintf(debugfile, "Defn for %s %s == <",
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symbol_type_name[type], name);
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if (is_extern)
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fputs("extern ", debugfile);
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print_list(debugfile, defn);
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fputs(">\n", debugfile);
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}
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++nsyms;
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return sym;
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}
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/*----------------------------------------------------------------------*/
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void free_node(struct string_list *node)
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{
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free(node->string);
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free(node);
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}
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void free_list(struct string_list *s, struct string_list *e)
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{
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while (s != e) {
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struct string_list *next = s->next;
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free_node(s);
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s = next;
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}
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}
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struct string_list *copy_node(struct string_list *node)
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{
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struct string_list *newnode;
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newnode = xmalloc(sizeof(*newnode));
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newnode->string = xstrdup(node->string);
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newnode->tag = node->tag;
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return newnode;
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}
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static int equal_list(struct string_list *a, struct string_list *b)
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{
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while (a && b) {
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if (a->tag != b->tag || strcmp(a->string, b->string))
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return 0;
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a = a->next;
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b = b->next;
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}
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return !a && !b;
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}
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static void print_node(FILE * f, struct string_list *list)
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{
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if (list->tag != SYM_NORMAL) {
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putc(symbol_type_name[list->tag][0], f);
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putc('#', f);
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}
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fputs(list->string, f);
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}
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static void print_list(FILE * f, struct string_list *list)
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{
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struct string_list **e, **b;
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struct string_list *tmp, **tmp2;
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int elem = 1;
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if (list == NULL) {
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fputs("(nil)", f);
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return;
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}
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tmp = list;
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while ((tmp = tmp->next) != NULL)
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elem++;
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b = alloca(elem * sizeof(*e));
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e = b + elem;
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tmp2 = e - 1;
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(*tmp2--) = list;
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while ((list = list->next) != NULL)
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*(tmp2--) = list;
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while (b != e) {
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print_node(f, *b++);
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putc(' ', f);
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}
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}
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static unsigned long expand_and_crc_sym(struct symbol *sym, unsigned long crc)
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{
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struct string_list *list = sym->defn;
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struct string_list **e, **b;
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struct string_list *tmp, **tmp2;
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int elem = 1;
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if (!list)
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return crc;
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tmp = list;
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while ((tmp = tmp->next) != NULL)
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elem++;
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b = alloca(elem * sizeof(*e));
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e = b + elem;
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tmp2 = e - 1;
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*(tmp2--) = list;
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while ((list = list->next) != NULL)
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*(tmp2--) = list;
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while (b != e) {
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struct string_list *cur;
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struct symbol *subsym;
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cur = *(b++);
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switch (cur->tag) {
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case SYM_NORMAL:
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if (flag_dump_defs)
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fprintf(debugfile, "%s ", cur->string);
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crc = partial_crc32(cur->string, crc);
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crc = partial_crc32_one(' ', crc);
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break;
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case SYM_TYPEDEF:
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subsym = find_symbol(cur->string, cur->tag);
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if (subsym->expansion_trail) {
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if (flag_dump_defs)
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fprintf(debugfile, "%s ", cur->string);
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crc = partial_crc32(cur->string, crc);
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crc = partial_crc32_one(' ', crc);
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} else {
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subsym->expansion_trail = expansion_trail;
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expansion_trail = subsym;
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crc = expand_and_crc_sym(subsym, crc);
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}
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break;
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case SYM_STRUCT:
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case SYM_UNION:
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case SYM_ENUM:
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subsym = find_symbol(cur->string, cur->tag);
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if (!subsym) {
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struct string_list *n, *t = NULL;
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error_with_pos("expand undefined %s %s",
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symbol_type_name[cur->tag],
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cur->string);
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n = xmalloc(sizeof(*n));
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n->string = xstrdup(symbol_type_name[cur->tag]);
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n->tag = SYM_NORMAL;
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n->next = t;
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t = n;
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n = xmalloc(sizeof(*n));
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n->string = xstrdup(cur->string);
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n->tag = SYM_NORMAL;
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n->next = t;
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t = n;
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n = xmalloc(sizeof(*n));
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n->string = xstrdup("{ UNKNOWN }");
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n->tag = SYM_NORMAL;
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n->next = t;
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subsym =
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add_symbol(cur->string, cur->tag, n, 0);
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}
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if (subsym->expansion_trail) {
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if (flag_dump_defs) {
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fprintf(debugfile, "%s %s ",
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symbol_type_name[cur->tag],
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cur->string);
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}
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crc = partial_crc32(symbol_type_name[cur->tag],
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crc);
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crc = partial_crc32_one(' ', crc);
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crc = partial_crc32(cur->string, crc);
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crc = partial_crc32_one(' ', crc);
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} else {
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subsym->expansion_trail = expansion_trail;
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expansion_trail = subsym;
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crc = expand_and_crc_sym(subsym, crc);
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}
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break;
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}
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}
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|
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{
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static struct symbol **end = &visited_symbols;
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|
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if (!sym->visited) {
|
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*end = sym;
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end = &sym->visited;
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sym->visited = (struct symbol *)-1L;
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}
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}
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|
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return crc;
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}
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|
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void export_symbol(const char *name)
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|
{
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struct symbol *sym;
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sym = find_symbol(name, SYM_NORMAL);
|
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if (!sym)
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error_with_pos("export undefined symbol %s", name);
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else {
|
|
unsigned long crc;
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|
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if (flag_dump_defs)
|
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fprintf(debugfile, "Export %s == <", name);
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|
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expansion_trail = (struct symbol *)-1L;
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crc = expand_and_crc_sym(sym, 0xffffffff) ^ 0xffffffff;
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|
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sym = expansion_trail;
|
|
while (sym != (struct symbol *)-1L) {
|
|
struct symbol *n = sym->expansion_trail;
|
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sym->expansion_trail = 0;
|
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sym = n;
|
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}
|
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|
|
if (flag_dump_defs)
|
|
fputs(">\n", debugfile);
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|
|
/* Used as a linker script. */
|
|
printf("%s__crc_%s = 0x%08lx ;\n", mod_prefix, name, crc);
|
|
}
|
|
}
|
|
|
|
/*----------------------------------------------------------------------*/
|
|
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++;
|
|
}
|
|
}
|
|
|
|
static void genksyms_usage(void)
|
|
{
|
|
fputs("Usage:\n" "genksyms [-adDTwqhV] > /path/to/.tmp_obj.ver\n" "\n"
|
|
#ifdef __GNU_LIBRARY__
|
|
" -a, --arch Select architecture\n"
|
|
" -d, --debug Increment the debug level (repeatable)\n"
|
|
" -D, --dump Dump expanded symbol defs (for debugging only)\n"
|
|
" -T, --dump-types file Dump expanded types into file (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__ */
|
|
" -a Select architecture\n"
|
|
" -d Increment the debug level (repeatable)\n"
|
|
" -D Dump expanded symbol defs (for debugging only)\n"
|
|
" -T file Dump expanded types into file (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)
|
|
{
|
|
FILE *dumpfile = NULL;
|
|
int o;
|
|
|
|
#ifdef __GNU_LIBRARY__
|
|
struct option long_opts[] = {
|
|
{"arch", 1, 0, 'a'},
|
|
{"debug", 0, 0, 'd'},
|
|
{"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:dwqVDT:h",
|
|
&long_opts[0], NULL)) != EOF)
|
|
#else /* __GNU_LIBRARY__ */
|
|
while ((o = getopt(argc, argv, "a:dwqVDT:h")) != EOF)
|
|
#endif /* __GNU_LIBRARY__ */
|
|
switch (o) {
|
|
case 'a':
|
|
arch = 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 'T':
|
|
flag_dump_types = 1;
|
|
dumpfile = fopen(optarg, "w");
|
|
if (!dumpfile) {
|
|
perror(optarg);
|
|
return 1;
|
|
}
|
|
break;
|
|
case 'h':
|
|
genksyms_usage();
|
|
return 0;
|
|
default:
|
|
genksyms_usage();
|
|
return 1;
|
|
}
|
|
if ((strcmp(arch, "h8300") == 0) || (strcmp(arch, "blackfin") == 0))
|
|
mod_prefix = "_";
|
|
{
|
|
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_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);
|
|
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;
|
|
}
|