#define HASH_BUCKETS 4096
static struct symbol *symtab[HASH_BUCKETS];
-FILE *debugfile;
+static FILE *debugfile;
int cur_line = 1;
-char *cur_filename, *output_directory;
+char *cur_filename;
-int flag_debug, flag_dump_defs, flag_warnings;
-const char *arch = "";
-const char *mod_prefix = "";
+static int flag_debug, flag_dump_defs, flag_reference, flag_dump_types,
+ flag_preserve, flag_warnings;
+static const char *arch = "";
+static const char *mod_prefix = "";
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"
};
+static int equal_list(struct string_list *a, struct string_list *b);
+static void print_list(FILE * f, struct string_list *list);
+static void print_location(void);
+static void print_type_name(enum symbol_type type, const char *name);
+
/*----------------------------------------------------------------------*/
static const unsigned int crctab32[] = {
0x2d02ef8dU
};
-static inline unsigned long
-partial_crc32_one(unsigned char c, unsigned long crc)
+static unsigned long partial_crc32_one(unsigned char c, unsigned long crc)
{
return crctab32[(crc ^ c) & 0xff] ^ (crc >> 8);
}
-static inline unsigned long partial_crc32(const char *s, unsigned long crc)
+static unsigned long partial_crc32(const char *s, unsigned long crc)
{
while (*s)
crc = partial_crc32_one(*s++, crc);
return crc;
}
-static inline unsigned long crc32(const char *s)
+static unsigned long crc32(const char *s)
{
return partial_crc32(s, 0xffffffff) ^ 0xffffffff;
}
/*----------------------------------------------------------------------*/
-static inline enum symbol_type map_to_ns(enum symbol_type t)
+static enum symbol_type map_to_ns(enum symbol_type t)
{
if (t == SYM_TYPEDEF)
t = SYM_NORMAL;
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)
+ if (map_to_ns(sym->type) == map_to_ns(ns) &&
+ strcmp(name, sym->name) == 0 &&
+ sym->is_declared)
break;
return sym;
}
-struct symbol *add_symbol(const char *name, enum symbol_type type,
- struct string_list *defn, int is_extern)
+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 = 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(type)
- && strcmp(name, sym->name) == 0) {
- if (!equal_list(sym->defn, defn))
+ enum symbol_status status = STATUS_UNCHANGED;
+
+ 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;
+ 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) {
fprintf(debugfile, "Defn for %s %s == <",
symbol_type_name[type], name);
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);
+}
+
/*----------------------------------------------------------------------*/
-inline void free_node(struct string_list *node)
+void free_node(struct string_list *node)
{
free(node->string);
free(node);
}
}
-inline struct string_list *copy_node(struct string_list *node)
+struct string_list *copy_node(struct string_list *node)
{
struct string_list *newnode;
return newnode;
}
-struct string_list *copy_list(struct string_list *s, struct string_list *e)
-{
- struct string_list *h, *p;
-
- if (s == e)
- return NULL;
-
- p = h = copy_node(s);
- while ((s = s->next) != e)
- p = p->next = copy_node(s);
- p->next = NULL;
-
- return h;
-}
-
-int equal_list(struct string_list *a, struct string_list *b)
+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 !a && !b;
}
-static inline void print_node(FILE * f, struct string_list *list)
+#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] == '#') {
+ int n;
+
+ for (n = 0; n < ARRAY_SIZE(symbol_type_name); n++) {
+ if (node.string[0] == symbol_type_name[n][0]) {
+ 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)
{
- 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:
+ 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 (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);
}
-void print_list(FILE * f, struct string_list *list)
+static void print_list(FILE * f, struct string_list *list)
{
struct string_list **e, **b;
struct string_list *tmp, **tmp2;
}
}
-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;
case SYM_TYPEDEF:
subsym = find_symbol(cur->string, cur->tag);
+ /* FIXME: Bad reference files can segfault here. */
if (subsym->expansion_trail) {
if (flag_dump_defs)
fprintf(debugfile, "%s ", cur->string);
} 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;
t = n;
n = xmalloc(sizeof(*n));
- n->string = xstrdup("{ UNKNOWN }");
+ n->string = xstrdup("{");
n->tag = SYM_NORMAL;
n->next = t;
+ t = n;
+
+ n = xmalloc(sizeof(*n));
+ n->string = xstrdup("UNKNOWN");
+ n->tag = SYM_NORMAL;
+ n->next = t;
+ t = n;
+
+ n = xmalloc(sizeof(*n));
+ n->string = xstrdup("}");
+ n->tag = SYM_NORMAL;
+ n->next = t;
+ t = n;
subsym =
add_symbol(cur->string, cur->tag, n, 0);
cur->string);
}
- crc =
- partial_crc32(symbol_type_name[cur->tag],
- crc);
+ crc = partial_crc32(symbol_type_name[cur->tag],
+ 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_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;
}
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;
- crc = expand_and_crc_list(sym->defn, 0xffffffff) ^ 0xffffffff;
+ 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);
/*----------------------------------------------------------------------*/
-void error(const char *fmt, ...)
+static void print_location(void)
{
- va_list args;
-
- if (flag_warnings) {
- va_start(args, fmt);
- vfprintf(stderr, fmt, args);
- va_end(args);
- putc('\n', stderr);
+ fprintf(stderr, "%s:%d: ", cur_filename ? : "<stdin>", cur_line);
+}
- errors++;
- }
+static void print_type_name(enum symbol_type type, const char *name)
+{
+ if (type != SYM_NORMAL)
+ fprintf(stderr, "%s %s", symbol_type_name[type], name);
+ else
+ fprintf(stderr, "%s", name);
}
void error_with_pos(const char *fmt, ...)
va_list args;
if (flag_warnings) {
- fprintf(stderr, "%s:%d: ", cur_filename ? : "<stdin>",
- cur_line);
+ print_location();
va_start(args, fmt);
vfprintf(stderr, fmt, args);
}
}
-void genksyms_usage(void)
+static void genksyms_usage(void)
{
- fputs("Usage:\n" "genksyms [-dDwqhV] > /path/to/.tmp_obj.ver\n" "\n"
+ 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"
+ " -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__ */
+ " -a Select architecture\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"
int main(int argc, char **argv)
{
+ FILE *dumpfile = NULL, *ref_file = NULL;
int o;
#ifdef __GNU_LIBRARY__
{"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, "a:dwqVDk:p:",
+ while ((o = getopt_long(argc, argv, "a:dwqVDr:T:ph",
&long_opts[0], NULL)) != EOF)
#else /* __GNU_LIBRARY__ */
- while ((o = getopt(argc, argv, "a:dwqVDk:p:")) != EOF)
+ while ((o = getopt(argc, argv, "a:dwqVDr:T:ph")) != EOF)
#endif /* __GNU_LIBRARY__ */
switch (o) {
case 'a':
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;
genksyms_usage();
return 1;
}
- if ((strcmp(arch, "v850") == 0) || (strcmp(arch, "h8300") == 0))
+ if ((strcmp(arch, "h8300") == 0) || (strcmp(arch, "blackfin") == 0))
mod_prefix = "_";
{
extern int yydebug;
/* setlinebuf(debugfile); */
}
+ if (flag_reference)
+ read_reference(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 (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,
git://ftp.safe.ca / safe / jmp / linux-2.6 / blobdiff