summaryrefslogtreecommitdiff
path: root/scripts/asn1_compiler.c
diff options
context:
space:
mode:
Diffstat (limited to 'scripts/asn1_compiler.c')
-rw-r--r--scripts/asn1_compiler.c248
1 files changed, 154 insertions, 94 deletions
diff --git a/scripts/asn1_compiler.c b/scripts/asn1_compiler.c
index 7750e9c31483..e000f44e37b8 100644
--- a/scripts/asn1_compiler.c
+++ b/scripts/asn1_compiler.c
@@ -13,6 +13,7 @@
#include <stdio.h>
#include <stdlib.h>
#include <stdint.h>
+#include <stdbool.h>
#include <string.h>
#include <ctype.h>
#include <unistd.h>
@@ -293,8 +294,8 @@ static const char *const directives[NR__DIRECTIVES] = {
struct action {
struct action *next;
+ char *name;
unsigned char index;
- char name[];
};
static struct action *action_list;
@@ -305,15 +306,17 @@ struct token {
enum token_type token_type : 8;
unsigned char size;
struct action *action;
- const char *value;
+ char *content;
struct type *type;
};
static struct token *token_list;
static unsigned nr_tokens;
-static _Bool verbose;
+static bool verbose_opt;
+static bool debug_opt;
-#define debug(fmt, ...) do { if (verbose) printf(fmt, ## __VA_ARGS__); } while (0)
+#define verbose(fmt, ...) do { if (verbose_opt) printf(fmt, ## __VA_ARGS__); } while (0)
+#define debug(fmt, ...) do { if (debug_opt) printf(fmt, ## __VA_ARGS__); } while (0)
static int directive_compare(const void *_key, const void *_pdir)
{
@@ -325,11 +328,9 @@ static int directive_compare(const void *_key, const void *_pdir)
dlen = strlen(dir);
clen = (dlen < token->size) ? dlen : token->size;
- //debug("cmp(%*.*s,%s) = ",
- // (int)token->size, (int)token->size, token->value,
- // dir);
+ //debug("cmp(%s,%s) = ", token->content, dir);
- val = memcmp(token->value, dir, clen);
+ val = memcmp(token->content, dir, clen);
if (val != 0) {
//debug("%d [cmp]\n", val);
return val;
@@ -349,7 +350,7 @@ static int directive_compare(const void *_key, const void *_pdir)
static void tokenise(char *buffer, char *end)
{
struct token *tokens;
- char *line, *nl, *p, *q;
+ char *line, *nl, *start, *p, *q;
unsigned tix, lineno;
/* Assume we're going to have half as many tokens as we have
@@ -408,11 +409,11 @@ static void tokenise(char *buffer, char *end)
break;
tokens[tix].line = lineno;
- tokens[tix].value = p;
+ start = p;
/* Handle string tokens */
if (isalpha(*p)) {
- const char **dir;
+ const char **dir, *start = p;
/* Can be a directive, type name or element
* name. Find the end of the name.
@@ -423,10 +424,18 @@ static void tokenise(char *buffer, char *end)
tokens[tix].size = q - p;
p = q;
+ tokens[tix].content = malloc(tokens[tix].size + 1);
+ if (!tokens[tix].content) {
+ perror(NULL);
+ exit(1);
+ }
+ memcpy(tokens[tix].content, start, tokens[tix].size);
+ tokens[tix].content[tokens[tix].size] = 0;
+
/* If it begins with a lowercase letter then
* it's an element name
*/
- if (islower(tokens[tix].value[0])) {
+ if (islower(tokens[tix].content[0])) {
tokens[tix++].token_type = TOKEN_ELEMENT_NAME;
continue;
}
@@ -455,6 +464,13 @@ static void tokenise(char *buffer, char *end)
q++;
tokens[tix].size = q - p;
p = q;
+ tokens[tix].content = malloc(tokens[tix].size + 1);
+ if (!tokens[tix].content) {
+ perror(NULL);
+ exit(1);
+ }
+ memcpy(tokens[tix].content, start, tokens[tix].size);
+ tokens[tix].content[tokens[tix].size] = 0;
tokens[tix++].token_type = TOKEN_NUMBER;
continue;
}
@@ -463,6 +479,7 @@ static void tokenise(char *buffer, char *end)
if (memcmp(p, "::=", 3) == 0) {
p += 3;
tokens[tix].size = 3;
+ tokens[tix].content = "::=";
tokens[tix++].token_type = TOKEN_ASSIGNMENT;
continue;
}
@@ -472,12 +489,14 @@ static void tokenise(char *buffer, char *end)
if (memcmp(p, "({", 2) == 0) {
p += 2;
tokens[tix].size = 2;
+ tokens[tix].content = "({";
tokens[tix++].token_type = TOKEN_OPEN_ACTION;
continue;
}
if (memcmp(p, "})", 2) == 0) {
p += 2;
tokens[tix].size = 2;
+ tokens[tix].content = "})";
tokens[tix++].token_type = TOKEN_CLOSE_ACTION;
continue;
}
@@ -488,22 +507,27 @@ static void tokenise(char *buffer, char *end)
switch (*p) {
case '{':
p += 1;
+ tokens[tix].content = "{";
tokens[tix++].token_type = TOKEN_OPEN_CURLY;
continue;
case '}':
p += 1;
+ tokens[tix].content = "}";
tokens[tix++].token_type = TOKEN_CLOSE_CURLY;
continue;
case '[':
p += 1;
+ tokens[tix].content = "[";
tokens[tix++].token_type = TOKEN_OPEN_SQUARE;
continue;
case ']':
p += 1;
+ tokens[tix].content = "]";
tokens[tix++].token_type = TOKEN_CLOSE_SQUARE;
continue;
case ',':
p += 1;
+ tokens[tix].content = ",";
tokens[tix++].token_type = TOKEN_COMMA;
continue;
default:
@@ -518,22 +542,20 @@ static void tokenise(char *buffer, char *end)
}
nr_tokens = tix;
- debug("Extracted %u tokens\n", nr_tokens);
+ verbose("Extracted %u tokens\n", nr_tokens);
#if 0
{
int n;
for (n = 0; n < nr_tokens; n++)
- debug("Token %3u: '%*.*s'\n",
- n,
- (int)token_list[n].size, (int)token_list[n].size,
- token_list[n].value);
+ debug("Token %3u: '%s'\n", n, token_list[n].content);
}
#endif
}
static void build_type_list(void);
static void parse(void);
+static void dump_elements(void);
static void render(FILE *out, FILE *hdr);
/*
@@ -548,16 +570,27 @@ int main(int argc, char **argv)
char *kbuild_verbose;
int fd;
+ kbuild_verbose = getenv("KBUILD_VERBOSE");
+ if (kbuild_verbose)
+ verbose_opt = atoi(kbuild_verbose);
+
+ while (argc > 4) {
+ if (strcmp(argv[1], "-v") == 0)
+ verbose_opt = true;
+ else if (strcmp(argv[1], "-d") == 0)
+ debug_opt = true;
+ else
+ break;
+ memmove(&argv[1], &argv[2], (argc - 2) * sizeof(char *));
+ argc--;
+ }
+
if (argc != 4) {
- fprintf(stderr, "Format: %s <grammar-file> <c-file> <hdr-file>\n",
+ fprintf(stderr, "Format: %s [-v] [-d] <grammar-file> <c-file> <hdr-file>\n",
argv[0]);
exit(2);
}
- kbuild_verbose = getenv("KBUILD_VERBOSE");
- if (kbuild_verbose)
- verbose = atoi(kbuild_verbose);
-
filename = argv[1];
outputname = argv[2];
headername = argv[3];
@@ -608,6 +641,7 @@ int main(int argc, char **argv)
tokenise(buffer, buffer + readlen);
build_type_list();
parse();
+ dump_elements();
out = fopen(outputname, "w");
if (!out) {
@@ -666,7 +700,7 @@ struct element {
unsigned flags;
#define ELEMENT_IMPLICIT 0x0001
#define ELEMENT_EXPLICIT 0x0002
-#define ELEMENT_MARKED 0x0004
+#define ELEMENT_TAG_SPECIFIED 0x0004
#define ELEMENT_RENDERED 0x0008
#define ELEMENT_SKIPPABLE 0x0010
#define ELEMENT_CONDITIONAL 0x0020
@@ -693,7 +727,7 @@ static int type_index_compare(const void *_a, const void *_b)
if ((*a)->name->size != (*b)->name->size)
return (*a)->name->size - (*b)->name->size;
else
- return memcmp((*a)->name->value, (*b)->name->value,
+ return memcmp((*a)->name->content, (*b)->name->content,
(*a)->name->size);
}
@@ -706,7 +740,7 @@ static int type_finder(const void *_key, const void *_ti)
if (token->size != type->name->size)
return token->size - type->name->size;
else
- return memcmp(token->value, type->name->value,
+ return memcmp(token->content, type->name->content,
token->size);
}
@@ -756,14 +790,11 @@ static void build_type_list(void)
qsort(type_index, nr, sizeof(type_index[0]), type_index_compare);
- debug("Extracted %u types\n", nr_types);
+ verbose("Extracted %u types\n", nr_types);
#if 0
for (n = 0; n < nr_types; n++) {
struct type *type = type_index[n];
- debug("- %*.*s\n",
- (int)type->name->size,
- (int)type->name->size,
- type->name->value);
+ debug("- %*.*s\n", type->name->content);
}
#endif
}
@@ -793,15 +824,14 @@ static void parse(void)
type->element->type_def = type;
if (cursor != type[1].name) {
- fprintf(stderr, "%s:%d: Parse error at token '%*.*s'\n",
- filename, cursor->line,
- (int)cursor->size, (int)cursor->size, cursor->value);
+ fprintf(stderr, "%s:%d: Parse error at token '%s'\n",
+ filename, cursor->line, cursor->content);
exit(1);
}
} while (type++, !(type->flags & TYPE_STOP_MARKER));
- debug("Extracted %u actions\n", nr_actions);
+ verbose("Extracted %u actions\n", nr_actions);
}
static struct element *element_list;
@@ -862,33 +892,31 @@ static struct element *parse_type(struct token **_cursor, struct token *end,
cursor++;
break;
default:
- fprintf(stderr, "%s:%d: Unrecognised tag class token '%*.*s'\n",
- filename, cursor->line,
- (int)cursor->size, (int)cursor->size, cursor->value);
+ fprintf(stderr, "%s:%d: Unrecognised tag class token '%s'\n",
+ filename, cursor->line, cursor->content);
exit(1);
}
if (cursor >= end)
goto overrun_error;
if (cursor->token_type != TOKEN_NUMBER) {
- fprintf(stderr, "%s:%d: Missing tag number '%*.*s'\n",
- filename, cursor->line,
- (int)cursor->size, (int)cursor->size, cursor->value);
+ fprintf(stderr, "%s:%d: Missing tag number '%s'\n",
+ filename, cursor->line, cursor->content);
exit(1);
}
element->tag &= ~0x1f;
- element->tag |= strtoul(cursor->value, &p, 10);
- if (p - cursor->value != cursor->size)
+ element->tag |= strtoul(cursor->content, &p, 10);
+ element->flags |= ELEMENT_TAG_SPECIFIED;
+ if (p - cursor->content != cursor->size)
abort();
cursor++;
if (cursor >= end)
goto overrun_error;
if (cursor->token_type != TOKEN_CLOSE_SQUARE) {
- fprintf(stderr, "%s:%d: Missing closing square bracket '%*.*s'\n",
- filename, cursor->line,
- (int)cursor->size, (int)cursor->size, cursor->value);
+ fprintf(stderr, "%s:%d: Missing closing square bracket '%s'\n",
+ filename, cursor->line, cursor->content);
exit(1);
}
cursor++;
@@ -988,9 +1016,8 @@ static struct element *parse_type(struct token **_cursor, struct token *end,
ref = bsearch(cursor, type_index, nr_types, sizeof(type_index[0]),
type_finder);
if (!ref) {
- fprintf(stderr, "%s:%d: Type '%*.*s' undefined\n",
- filename, cursor->line,
- (int)cursor->size, (int)cursor->size, cursor->value);
+ fprintf(stderr, "%s:%d: Type '%s' undefined\n",
+ filename, cursor->line, cursor->content);
exit(1);
}
cursor->type = *ref;
@@ -1039,9 +1066,8 @@ static struct element *parse_type(struct token **_cursor, struct token *end,
break;
default:
- fprintf(stderr, "%s:%d: Token '%*.*s' does not introduce a type\n",
- filename, cursor->line,
- (int)cursor->size, (int)cursor->size, cursor->value);
+ fprintf(stderr, "%s:%d: Token '%s' does not introduce a type\n",
+ filename, cursor->line, cursor->content);
exit(1);
}
@@ -1058,20 +1084,18 @@ static struct element *parse_type(struct token **_cursor, struct token *end,
if (cursor >= end)
goto overrun_error;
if (cursor->token_type != TOKEN_ELEMENT_NAME) {
- fprintf(stderr, "%s:%d: Token '%*.*s' is not an action function name\n",
- filename, cursor->line,
- (int)cursor->size, (int)cursor->size, cursor->value);
+ fprintf(stderr, "%s:%d: Token '%s' is not an action function name\n",
+ filename, cursor->line, cursor->content);
exit(1);
}
- action = malloc(sizeof(struct action) + cursor->size + 1);
+ action = malloc(sizeof(struct action));
if (!action) {
perror(NULL);
exit(1);
}
action->index = 0;
- memcpy(action->name, cursor->value, cursor->size);
- action->name[cursor->size] = 0;
+ action->name = cursor->content;
for (ppaction = &action_list;
*ppaction;
@@ -1101,9 +1125,8 @@ static struct element *parse_type(struct token **_cursor, struct token *end,
if (cursor >= end)
goto overrun_error;
if (cursor->token_type != TOKEN_CLOSE_ACTION) {
- fprintf(stderr, "%s:%d: Missing close action, got '%*.*s'\n",
- filename, cursor->line,
- (int)cursor->size, (int)cursor->size, cursor->value);
+ fprintf(stderr, "%s:%d: Missing close action, got '%s'\n",
+ filename, cursor->line, cursor->content);
exit(1);
}
cursor++;
@@ -1113,9 +1136,8 @@ static struct element *parse_type(struct token **_cursor, struct token *end,
return top;
parse_error:
- fprintf(stderr, "%s:%d: Unexpected token '%*.*s'\n",
- filename, cursor->line,
- (int)cursor->size, (int)cursor->size, cursor->value);
+ fprintf(stderr, "%s:%d: Unexpected token '%s'\n",
+ filename, cursor->line, cursor->content);
exit(1);
overrun_error:
@@ -1133,9 +1155,8 @@ static struct element *parse_compound(struct token **_cursor, struct token *end,
struct token *cursor = *_cursor, *name;
if (cursor->token_type != TOKEN_OPEN_CURLY) {
- fprintf(stderr, "%s:%d: Expected compound to start with brace not '%*.*s'\n",
- filename, cursor->line,
- (int)cursor->size, (int)cursor->size, cursor->value);
+ fprintf(stderr, "%s:%d: Expected compound to start with brace not '%s'\n",
+ filename, cursor->line, cursor->content);
exit(1);
}
cursor++;
@@ -1176,9 +1197,8 @@ static struct element *parse_compound(struct token **_cursor, struct token *end,
children->flags &= ~ELEMENT_CONDITIONAL;
if (cursor->token_type != TOKEN_CLOSE_CURLY) {
- fprintf(stderr, "%s:%d: Expected compound closure, got '%*.*s'\n",
- filename, cursor->line,
- (int)cursor->size, (int)cursor->size, cursor->value);
+ fprintf(stderr, "%s:%d: Expected compound closure, got '%s'\n",
+ filename, cursor->line, cursor->content);
exit(1);
}
cursor++;
@@ -1191,6 +1211,52 @@ overrun_error:
exit(1);
}
+static void dump_element(const struct element *e, int level)
+{
+ const struct element *c;
+ const struct type *t = e->type_def;
+ const char *name = e->name ? e->name->content : ".";
+ const char *tname = t && t->name ? t->name->content : ".";
+ char tag[32];
+
+ if (e->class == 0 && e->method == 0 && e->tag == 0)
+ strcpy(tag, "<...>");
+ else if (e->class == ASN1_UNIV)
+ sprintf(tag, "%s %s %s",
+ asn1_classes[e->class],
+ asn1_methods[e->method],
+ asn1_universal_tags[e->tag]);
+ else
+ sprintf(tag, "%s %s %u",
+ asn1_classes[e->class],
+ asn1_methods[e->method],
+ e->tag);
+
+ printf("%c%c%c%c%c %c %*s[*] \e[33m%s\e[m %s %s \e[35m%s\e[m\n",
+ e->flags & ELEMENT_IMPLICIT ? 'I' : '-',
+ e->flags & ELEMENT_EXPLICIT ? 'E' : '-',
+ e->flags & ELEMENT_TAG_SPECIFIED ? 'T' : '-',
+ e->flags & ELEMENT_SKIPPABLE ? 'S' : '-',
+ e->flags & ELEMENT_CONDITIONAL ? 'C' : '-',
+ "-tTqQcaro"[e->compound],
+ level, "",
+ tag,
+ tname,
+ name,
+ e->action ? e->action->name : "");
+ if (e->compound == TYPE_REF)
+ dump_element(e->type->type->element, level + 3);
+ else
+ for (c = e->children; c; c = c->next)
+ dump_element(c, level + 3);
+}
+
+static void dump_elements(void)
+{
+ if (debug_opt)
+ dump_element(type_list[0].element, 0);
+}
+
static void render_element(FILE *out, struct element *e, struct element *tag);
static void render_out_of_line_list(FILE *out);
@@ -1292,7 +1358,7 @@ static void render(FILE *out, FILE *hdr)
}
/* We do two passes - the first one calculates all the offsets */
- debug("Pass 1\n");
+ verbose("Pass 1\n");
nr_entries = 0;
root = &type_list[0];
render_element(NULL, root->element, NULL);
@@ -1303,7 +1369,7 @@ static void render(FILE *out, FILE *hdr)
e->flags &= ~ELEMENT_RENDERED;
/* And then we actually render */
- debug("Pass 2\n");
+ verbose("Pass 2\n");
fprintf(out, "\n");
fprintf(out, "static const unsigned char %s_machine[] = {\n",
grammar_name);
@@ -1376,7 +1442,7 @@ static void render_out_of_line_list(FILE *out)
*/
static void render_element(FILE *out, struct element *e, struct element *tag)
{
- struct element *ec;
+ struct element *ec, *x;
const char *cond, *act;
int entry, skippable = 0, outofline = 0;
@@ -1389,9 +1455,7 @@ static void render_element(FILE *out, struct element *e, struct element *tag)
outofline = 1;
if (e->type_def && out) {
- render_more(out, "\t// %*.*s\n",
- (int)e->type_def->name->size, (int)e->type_def->name->size,
- e->type_def->name->value);
+ render_more(out, "\t// %s\n", e->type_def->name->content);
}
/* Render the operation */
@@ -1400,11 +1464,10 @@ static void render_element(FILE *out, struct element *e, struct element *tag)
act = e->action ? "_ACT" : "";
switch (e->compound) {
case ANY:
- render_opcode(out, "ASN1_OP_%sMATCH_ANY%s,", cond, act);
+ render_opcode(out, "ASN1_OP_%sMATCH_ANY%s%s,",
+ cond, act, skippable ? "_OR_SKIP" : "");
if (e->name)
- render_more(out, "\t\t// %*.*s",
- (int)e->name->size, (int)e->name->size,
- e->name->value);
+ render_more(out, "\t\t// %s", e->name->content);
render_more(out, "\n");
goto dont_render_tag;
@@ -1435,15 +1498,15 @@ static void render_element(FILE *out, struct element *e, struct element *tag)
break;
}
- if (e->name)
- render_more(out, "\t\t// %*.*s",
- (int)e->name->size, (int)e->name->size,
- e->name->value);
+ x = tag ?: e;
+ if (x->name)
+ render_more(out, "\t\t// %s", x->name->content);
render_more(out, "\n");
/* Render the tag */
- if (!tag)
+ if (!tag || !(tag->flags & ELEMENT_TAG_SPECIFIED))
tag = e;
+
if (tag->class == ASN1_UNIV &&
tag->tag != 14 &&
tag->tag != 15 &&
@@ -1465,7 +1528,8 @@ dont_render_tag:
case TYPE_REF:
render_element(out, e->type->type->element, tag);
if (e->action)
- render_opcode(out, "ASN1_OP_ACT,\n");
+ render_opcode(out, "ASN1_OP_%sACT,\n",
+ skippable ? "MAYBE_" : "");
break;
case SEQUENCE:
@@ -1474,10 +1538,8 @@ dont_render_tag:
* skipability */
render_opcode(out, "_jump_target(%u),", e->entry_index);
if (e->type_def && e->type_def->name)
- render_more(out, "\t\t// --> %*.*s",
- (int)e->type_def->name->size,
- (int)e->type_def->name->size,
- e->type_def->name->value);
+ render_more(out, "\t\t// --> %s",
+ e->type_def->name->content);
render_more(out, "\n");
if (!(e->flags & ELEMENT_RENDERED)) {
e->flags |= ELEMENT_RENDERED;
@@ -1502,10 +1564,8 @@ dont_render_tag:
* skipability */
render_opcode(out, "_jump_target(%u),", e->entry_index);
if (e->type_def && e->type_def->name)
- render_more(out, "\t\t// --> %*.*s",
- (int)e->type_def->name->size,
- (int)e->type_def->name->size,
- e->type_def->name->value);
+ render_more(out, "\t\t// --> %s",
+ e->type_def->name->content);
render_more(out, "\n");
if (!(e->flags & ELEMENT_RENDERED)) {
e->flags |= ELEMENT_RENDERED;
@@ -1539,7 +1599,7 @@ dont_render_tag:
case CHOICE:
for (ec = e->children; ec; ec = ec->next)
- render_element(out, ec, NULL);
+ render_element(out, ec, ec);
if (!skippable)
render_opcode(out, "ASN1_OP_COND_FAIL,\n");
if (e->action)
generated by cgit v1.2.3 (git 2.39.1) at 2024-12-02 20:19:05 +0000