2019-05-27 08:55:05 +02:00
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/* SPDX-License-Identifier: GPL-2.0-or-later */
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2005-04-17 00:20:36 +02:00
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/* 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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2019-05-27 08:55:05 +02:00
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*/
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2005-04-17 00:20:36 +02:00
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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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2006-03-12 23:26:29 +01:00
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enum symbol_type {
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2011-02-03 23:57:09 +01:00
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SYM_NORMAL, SYM_TYPEDEF, SYM_ENUM, SYM_STRUCT, SYM_UNION,
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SYM_ENUM_CONST
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2005-04-17 00:20:36 +02:00
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};
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2008-12-01 23:21:01 +01:00
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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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2006-03-12 23:26:29 +01:00
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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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2011-10-08 01:18:35 +02:00
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int in_source_file;
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2006-03-12 23:26:29 +01:00
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char *string;
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2005-04-17 00:20:36 +02:00
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};
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2006-03-12 23:26:29 +01:00
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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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kbuild: support for %.symtypes files
Here is a patch that adds a new -T option to genksyms for generating dumps of
the type definition that makes up the symbol version hashes. This allows to
trace modversion changes back to what caused them. The dump format is the
name of the type defined, followed by its definition (which is almost C):
s#list_head struct list_head { s#list_head * next , * prev ; }
The s#, u#, e#, and t# prefixes stand for struct, union, enum, and typedef.
The exported symbols do not define types, and thus do not have an x# prefix:
nfs4_acl_get_whotype int nfs4_acl_get_whotype ( char * , t#u32 )
The symbol type defintion of a single file can be generated with:
make fs/jbd/journal.symtypes
If KBUILD_SYMTYPES is defined, all the *.symtypes of all object files that
export symbols are generated.
The single *.symtypes files can be combined into a single file after a kernel
build with a script like the following:
for f in $(find -name '*.symtypes' | sort); do
f=${f#./}
echo "/* ${f%.symtypes}.o */"
cat $f
echo
done \
| sed -e '\:UNKNOWN:d' \
-e 's:[,;] }:}:g' \
-e 's:\([[({]\) :\1:g' \
-e 's: \([])},;]\):\1:g' \
-e 's: $::' \
$f \
| awk '
/^.#/ { if (defined[$1] == $0) {
print $1
next
}
defined[$1] = $0
}
{ print }
'
When the kernel ABI changes, diffing individual *.symtype files, or the
combined files, against each other will show which symbol changes caused the
ABI changes. This can save a tremendous amount of time.
Dump the types that make up modversions
Signed-off-by: Andreas Gruenbacher <agruen@suse.de>
Signed-off-by: Sam Ravnborg <sam@ravnborg.org>
2006-05-09 20:37:30 +02:00
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struct symbol *visited;
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2006-03-12 23:26:29 +01:00
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int is_extern;
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2008-12-01 23:21:01 +01:00
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int is_declared;
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enum symbol_status status;
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2008-12-01 23:21:03 +01:00
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int is_override;
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2005-04-17 00:20:36 +02:00
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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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2011-10-08 01:18:35 +02:00
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extern char *cur_filename, *source_file;
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extern int in_source_file;
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2005-04-17 00:20:36 +02:00
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2011-02-15 15:11:36 +01:00
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struct symbol *find_symbol(const char *name, enum symbol_type ns, int exact);
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2005-04-17 00:20:36 +02:00
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struct symbol *add_symbol(const char *name, enum symbol_type type,
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2006-03-12 23:26:29 +01:00
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struct string_list *defn, int is_extern);
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2005-04-17 00:20:36 +02:00
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void export_symbol(const char *);
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void free_node(struct string_list *list);
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2006-03-12 23:26:29 +01:00
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void free_list(struct string_list *s, struct string_list *e);
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2005-04-17 00:20:36 +02:00
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struct string_list *copy_node(struct string_list *);
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2011-02-03 23:57:09 +01:00
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struct string_list *copy_list_range(struct string_list *start,
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struct string_list *end);
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2005-04-17 00:20:36 +02:00
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int yylex(void);
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int yyparse(void);
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2017-05-20 13:27:00 +02:00
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void error_with_pos(const char *, ...) __attribute__ ((format(printf, 1, 2)));
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2005-04-17 00:20:36 +02:00
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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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2006-03-12 23:26:29 +01:00
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#endif /* genksyms.h */
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