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5dae9a550a
This adds an "override" keyword for use in *.symvers / *.symref files. When a symbol is overridden, the symbol's old definition will be used for computing checksums instead of the new one, preserving the previous checksum. (Genksyms will still warn about the change.) This is meant to allow distributions to hide minor actual as well as fake ABI changes. (For example, when extra type information becomes available because additional headers are included, this may change checksums even though none of the types used have actully changed.) This approach also allows to get rid of "#ifdef __GENKSYMS__" hacks in the code, which are currently used in some vendor kernels to work around checksum changes. Signed-off-by: Andreas Gruenbacher <agruen@suse.de> Cc: Randy Dunlap <randy.dunlap@oracle.com> Signed-off-by: Andrew Morton <akpm@linux-foundation.org> Signed-off-by: Sam Ravnborg <sam@ravnborg.org>
90 lines
2.5 KiB
C
90 lines
2.5 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 is part of the Linux modutils.
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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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#ifndef MODUTILS_GENKSYMS_H
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#define MODUTILS_GENKSYMS_H 1
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#include <stdio.h>
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enum symbol_type {
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SYM_NORMAL, SYM_TYPEDEF, SYM_ENUM, SYM_STRUCT, SYM_UNION
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};
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enum symbol_status {
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STATUS_UNCHANGED, STATUS_DEFINED, STATUS_MODIFIED
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};
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struct string_list {
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struct string_list *next;
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enum symbol_type tag;
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char *string;
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};
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struct symbol {
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struct symbol *hash_next;
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const char *name;
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enum symbol_type type;
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struct string_list *defn;
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struct symbol *expansion_trail;
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struct symbol *visited;
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int is_extern;
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int is_declared;
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enum symbol_status status;
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int is_override;
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};
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typedef struct string_list **yystype;
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#define YYSTYPE yystype
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extern int cur_line;
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extern char *cur_filename;
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struct symbol *find_symbol(const char *name, enum symbol_type ns);
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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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void export_symbol(const char *);
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void free_node(struct string_list *list);
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void free_list(struct string_list *s, struct string_list *e);
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struct string_list *copy_node(struct string_list *);
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int yylex(void);
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int yyparse(void);
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void error_with_pos(const char *, ...);
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/*----------------------------------------------------------------------*/
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#define xmalloc(size) ({ void *__ptr = malloc(size); \
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if(!__ptr && size != 0) { \
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fprintf(stderr, "out of memory\n"); \
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exit(1); \
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} \
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__ptr; })
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#define xstrdup(str) ({ char *__str = strdup(str); \
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if (!__str) { \
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fprintf(stderr, "out of memory\n"); \
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exit(1); \
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} \
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__str; })
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#endif /* genksyms.h */
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