summaryrefslogtreecommitdiffstats
path: root/scripts/genksyms/genksyms.c
diff options
context:
space:
mode:
Diffstat (limited to 'scripts/genksyms/genksyms.c')
-rw-r--r--scripts/genksyms/genksyms.c192
1 files changed, 136 insertions, 56 deletions
diff --git a/scripts/genksyms/genksyms.c b/scripts/genksyms/genksyms.c
index f99115ebe92..f9e75531ea0 100644
--- a/scripts/genksyms/genksyms.c
+++ b/scripts/genksyms/genksyms.c
@@ -53,12 +53,22 @@ 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 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);
@@ -140,14 +150,20 @@ static unsigned long crc32(const char *s)
static enum symbol_type map_to_ns(enum symbol_type t)
{
- if (t == SYM_TYPEDEF)
- t = SYM_NORMAL;
- else if (t == SYM_UNION)
- t = SYM_STRUCT;
+ 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)
+struct symbol *find_symbol(const char *name, enum symbol_type ns, int exact)
{
unsigned long h = crc32(name) % HASH_BUCKETS;
struct symbol *sym;
@@ -158,6 +174,8 @@ struct symbol *find_symbol(const char *name, enum symbol_type ns)
sym->is_declared)
break;
+ if (exact && sym && sym->type != ns)
+ return NULL;
return sym;
}
@@ -180,10 +198,47 @@ 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;
+ 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) {
@@ -247,8 +302,12 @@ static struct symbol *__add_symbol(const char *name, enum symbol_type type,
sym->is_override = 0;
if (flag_debug) {
- fprintf(debugfile, "Defn for %s %s == <",
- symbol_type_name[type], name);
+ 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);
@@ -288,6 +347,35 @@ void free_list(struct string_list *s, struct string_list *e)
}
}
+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;
@@ -299,6 +387,22 @@ struct string_list *copy_node(struct string_list *node)
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) {
@@ -346,8 +450,8 @@ static struct string_list *read_node(FILE *f)
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]) {
+ 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);
@@ -397,8 +501,8 @@ static void read_reference(FILE *f)
static void print_node(FILE * f, struct string_list *list)
{
- if (list->tag != SYM_NORMAL) {
- putc(symbol_type_name[list->tag][0], f);
+ if (symbol_types[list->tag].n) {
+ putc(symbol_types[list->tag].n, f);
putc('#', f);
}
fputs(list->string, f);
@@ -468,8 +572,9 @@ static unsigned long expand_and_crc_sym(struct symbol *sym, unsigned long crc)
crc = partial_crc32_one(' ', crc);
break;
+ case SYM_ENUM_CONST:
case SYM_TYPEDEF:
- subsym = find_symbol(cur->string, cur->tag);
+ subsym = find_symbol(cur->string, cur->tag, 0);
/* FIXME: Bad reference files can segfault here. */
if (subsym->expansion_trail) {
if (flag_dump_defs)
@@ -486,55 +591,30 @@ static unsigned long expand_and_crc_sym(struct symbol *sym, unsigned long crc)
case SYM_STRUCT:
case SYM_UNION:
case SYM_ENUM:
- subsym = find_symbol(cur->string, cur->tag);
+ subsym = find_symbol(cur->string, cur->tag, 0);
if (!subsym) {
- struct string_list *n, *t = NULL;
+ struct string_list *n;
error_with_pos("expand undefined %s %s",
- symbol_type_name[cur->tag],
+ symbol_types[cur->tag].name,
cur->string);
-
- n = xmalloc(sizeof(*n));
- n->string = xstrdup(symbol_type_name[cur->tag]);
- n->tag = SYM_NORMAL;
- n->next = t;
- t = n;
-
- n = xmalloc(sizeof(*n));
- n->string = xstrdup(cur->string);
- 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;
-
- 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;
-
+ 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_type_name[cur->tag],
+ symbol_types[cur->tag].name,
cur->string);
}
- crc = partial_crc32(symbol_type_name[cur->tag],
+ crc = partial_crc32(symbol_types[cur->tag].name,
crc);
crc = partial_crc32_one(' ', crc);
crc = partial_crc32(cur->string, crc);
@@ -565,7 +645,7 @@ void export_symbol(const char *name)
{
struct symbol *sym;
- sym = find_symbol(name, SYM_NORMAL);
+ sym = find_symbol(name, SYM_NORMAL, 0);
if (!sym)
error_with_pos("export undefined symbol %s", name);
else {
@@ -624,8 +704,8 @@ static void print_location(void)
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);
+ if (symbol_types[type].name)
+ fprintf(stderr, "%s %s", symbol_types[type].name, name);
else
fprintf(stderr, "%s", name);
}
@@ -771,8 +851,8 @@ int main(int argc, char **argv)
if (sym->is_override)
fputs("override ", dumpfile);
- if (sym->type != SYM_NORMAL) {
- putc(symbol_type_name[sym->type][0], dumpfile);
+ if (symbol_types[sym->type].n) {
+ putc(symbol_types[sym->type].n, dumpfile);
putc('#', dumpfile);
}
fputs(sym->name, dumpfile);
generated by cgit v1.2.3-70-g09d2 (git 2.46.0) at 2024-11-18 15:12:36 +0000