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linux-next/scripts/kconfig/confdata.c
Michal Marek bc081dd6e9 kbuild: generate modules.builtin 
To make it easier for module-init-tools and scripts like mkinitrd to
distinguish builtin and missing modules, install a modules.builtin file
listing all builtin modules. This is done by generating an additional
config file (tristate.conf) with tristate options set to uppercase 'Y'
or 'M'. If we source that config file, the builtin modules appear in
obj-Y.

Signed-off-by: Michal Marek <mmarek@suse.cz>
2009-12-12 13:08:16 +01:00

929 lines
19 KiB
C
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/*
* Copyright (C) 2002 Roman Zippel <zippel@linux-m68k.org>
* Released under the terms of the GNU GPL v2.0.
*/
#include <sys/stat.h>
#include <ctype.h>
#include <fcntl.h>
#include <stdio.h>
#include <stdlib.h>
#include <string.h>
#include <time.h>
#include <unistd.h>
#define LKC_DIRECT_LINK
#include "lkc.h"
static void conf_warning(const char *fmt, ...)
__attribute__ ((format (printf, 1, 2)));
static const char *conf_filename;
static int conf_lineno, conf_warnings, conf_unsaved;
const char conf_defname[] = "arch/$ARCH/defconfig";
static void conf_warning(const char *fmt, ...)
{
va_list ap;
va_start(ap, fmt);
fprintf(stderr, "%s:%d:warning: ", conf_filename, conf_lineno);
vfprintf(stderr, fmt, ap);
fprintf(stderr, "\n");
va_end(ap);
conf_warnings++;
}
const char *conf_get_configname(void)
{
char *name = getenv("KCONFIG_CONFIG");
return name ? name : ".config";
}
const char *conf_get_autoconfig_name(void)
{
char *name = getenv("KCONFIG_AUTOCONFIG");
return name ? name : "include/config/auto.conf";
}
static char *conf_expand_value(const char *in)
{
struct symbol *sym;
const char *src;
static char res_value[SYMBOL_MAXLENGTH];
char *dst, name[SYMBOL_MAXLENGTH];
res_value[0] = 0;
dst = name;
while ((src = strchr(in, '$'))) {
strncat(res_value, in, src - in);
src++;
dst = name;
while (isalnum(*src) || *src == '_')
*dst++ = *src++;
*dst = 0;
sym = sym_lookup(name, 0);
sym_calc_value(sym);
strcat(res_value, sym_get_string_value(sym));
in = src;
}
strcat(res_value, in);
return res_value;
}
char *conf_get_default_confname(void)
{
struct stat buf;
static char fullname[PATH_MAX+1];
char *env, *name;
name = conf_expand_value(conf_defname);
env = getenv(SRCTREE);
if (env) {
sprintf(fullname, "%s/%s", env, name);
if (!stat(fullname, &buf))
return fullname;
}
return name;
}
static int conf_set_sym_val(struct symbol *sym, int def, int def_flags, char *p)
{
char *p2;
switch (sym->type) {
case S_TRISTATE:
if (p[0] == 'm') {
sym->def[def].tri = mod;
sym->flags |= def_flags;
break;
}
case S_BOOLEAN:
if (p[0] == 'y') {
sym->def[def].tri = yes;
sym->flags |= def_flags;
break;
}
if (p[0] == 'n') {
sym->def[def].tri = no;
sym->flags |= def_flags;
break;
}
conf_warning("symbol value '%s' invalid for %s", p, sym->name);
break;
case S_OTHER:
if (*p != '"') {
for (p2 = p; *p2 && !isspace(*p2); p2++)
;
sym->type = S_STRING;
goto done;
}
case S_STRING:
if (*p++ != '"')
break;
for (p2 = p; (p2 = strpbrk(p2, "\"\\")); p2++) {
if (*p2 == '"') {
*p2 = 0;
break;
}
memmove(p2, p2 + 1, strlen(p2));
}
if (!p2) {
conf_warning("invalid string found");
return 1;
}
case S_INT:
case S_HEX:
done:
if (sym_string_valid(sym, p)) {
sym->def[def].val = strdup(p);
sym->flags |= def_flags;
} else {
conf_warning("symbol value '%s' invalid for %s", p, sym->name);
return 1;
}
break;
default:
;
}
return 0;
}
int conf_read_simple(const char *name, int def)
{
FILE *in = NULL;
char line[1024];
char *p, *p2;
struct symbol *sym;
int i, def_flags;
if (name) {
in = zconf_fopen(name);
} else {
struct property *prop;
name = conf_get_configname();
in = zconf_fopen(name);
if (in)
goto load;
sym_add_change_count(1);
if (!sym_defconfig_list)
return 1;
for_all_defaults(sym_defconfig_list, prop) {
if (expr_calc_value(prop->visible.expr) == no ||
prop->expr->type != E_SYMBOL)
continue;
name = conf_expand_value(prop->expr->left.sym->name);
in = zconf_fopen(name);
if (in) {
printf(_("#\n"
"# using defaults found in %s\n"
"#\n"), name);
goto load;
}
}
}
if (!in)
return 1;
load:
conf_filename = name;
conf_lineno = 0;
conf_warnings = 0;
conf_unsaved = 0;
def_flags = SYMBOL_DEF << def;
for_all_symbols(i, sym) {
sym->flags |= SYMBOL_CHANGED;
sym->flags &= ~(def_flags|SYMBOL_VALID);
if (sym_is_choice(sym))
sym->flags |= def_flags;
switch (sym->type) {
case S_INT:
case S_HEX:
case S_STRING:
if (sym->def[def].val)
free(sym->def[def].val);
default:
sym->def[def].val = NULL;
sym->def[def].tri = no;
}
}
while (fgets(line, sizeof(line), in)) {
conf_lineno++;
sym = NULL;
switch (line[0]) {
case '#':
if (memcmp(line + 2, "CONFIG_", 7))
continue;
p = strchr(line + 9, ' ');
if (!p)
continue;
*p++ = 0;
if (strncmp(p, "is not set", 10))
continue;
if (def == S_DEF_USER) {
sym = sym_find(line + 9);
if (!sym) {
sym_add_change_count(1);
break;
}
} else {
sym = sym_lookup(line + 9, 0);
if (sym->type == S_UNKNOWN)
sym->type = S_BOOLEAN;
}
if (sym->flags & def_flags) {
conf_warning("override: reassigning to symbol %s", sym->name);
}
switch (sym->type) {
case S_BOOLEAN:
case S_TRISTATE:
sym->def[def].tri = no;
sym->flags |= def_flags;
break;
default:
;
}
break;
case 'C':
if (memcmp(line, "CONFIG_", 7)) {
conf_warning("unexpected data");
continue;
}
p = strchr(line + 7, '=');
if (!p)
continue;
*p++ = 0;
p2 = strchr(p, '\n');
if (p2) {
*p2-- = 0;
if (*p2 == '\r')
*p2 = 0;
}
if (def == S_DEF_USER) {
sym = sym_find(line + 7);
if (!sym) {
sym_add_change_count(1);
break;
}
} else {
sym = sym_lookup(line + 7, 0);
if (sym->type == S_UNKNOWN)
sym->type = S_OTHER;
}
if (sym->flags & def_flags) {
conf_warning("override: reassigning to symbol %s", sym->name);
}
if (conf_set_sym_val(sym, def, def_flags, p))
continue;
break;
case '\r':
case '\n':
break;
default:
conf_warning("unexpected data");
continue;
}
if (sym && sym_is_choice_value(sym)) {
struct symbol *cs = prop_get_symbol(sym_get_choice_prop(sym));
switch (sym->def[def].tri) {
case no:
break;
case mod:
if (cs->def[def].tri == yes) {
conf_warning("%s creates inconsistent choice state", sym->name);
cs->flags &= ~def_flags;
}
break;
case yes:
if (cs->def[def].tri != no)
conf_warning("override: %s changes choice state", sym->name);
cs->def[def].val = sym;
break;
}
cs->def[def].tri = EXPR_OR(cs->def[def].tri, sym->def[def].tri);
}
}
fclose(in);
if (modules_sym)
sym_calc_value(modules_sym);
return 0;
}
int conf_read(const char *name)
{
struct symbol *sym, *choice_sym;
struct property *prop;
struct expr *e;
int i, flags;
sym_set_change_count(0);
if (conf_read_simple(name, S_DEF_USER))
return 1;
for_all_symbols(i, sym) {
sym_calc_value(sym);
if (sym_is_choice(sym) || (sym->flags & SYMBOL_AUTO))
goto sym_ok;
if (sym_has_value(sym) && (sym->flags & SYMBOL_WRITE)) {
/* check that calculated value agrees with saved value */
switch (sym->type) {
case S_BOOLEAN:
case S_TRISTATE:
if (sym->def[S_DEF_USER].tri != sym_get_tristate_value(sym))
break;
if (!sym_is_choice(sym))
goto sym_ok;
default:
if (!strcmp(sym->curr.val, sym->def[S_DEF_USER].val))
goto sym_ok;
break;
}
} else if (!sym_has_value(sym) && !(sym->flags & SYMBOL_WRITE))
/* no previous value and not saved */
goto sym_ok;
conf_unsaved++;
/* maybe print value in verbose mode... */
sym_ok:
if (!sym_is_choice(sym))
continue;
/* The choice symbol only has a set value (and thus is not new)
* if all its visible childs have values.
*/
prop = sym_get_choice_prop(sym);
flags = sym->flags;
expr_list_for_each_sym(prop->expr, e, choice_sym)
if (choice_sym->visible != no)
flags &= choice_sym->flags;
sym->flags &= flags | ~SYMBOL_DEF_USER;
}
for_all_symbols(i, sym) {
if (sym_has_value(sym) && !sym_is_choice_value(sym)) {
/* Reset values of generates values, so they'll appear
* as new, if they should become visible, but that
* doesn't quite work if the Kconfig and the saved
* configuration disagree.
*/
if (sym->visible == no && !conf_unsaved)
sym->flags &= ~SYMBOL_DEF_USER;
switch (sym->type) {
case S_STRING:
case S_INT:
case S_HEX:
/* Reset a string value if it's out of range */
if (sym_string_within_range(sym, sym->def[S_DEF_USER].val))
break;
sym->flags &= ~(SYMBOL_VALID|SYMBOL_DEF_USER);
conf_unsaved++;
break;
default:
break;
}
}
}
sym_add_change_count(conf_warnings || conf_unsaved);
return 0;
}
int conf_write(const char *name)
{
FILE *out;
struct symbol *sym;
struct menu *menu;
const char *basename;
char dirname[128], tmpname[128], newname[128];
int type, l;
const char *str;
time_t now;
int use_timestamp = 1;
char *env;
dirname[0] = 0;
if (name && name[0]) {
struct stat st;
char *slash;
if (!stat(name, &st) && S_ISDIR(st.st_mode)) {
strcpy(dirname, name);
strcat(dirname, "/");
basename = conf_get_configname();
} else if ((slash = strrchr(name, '/'))) {
int size = slash - name + 1;
memcpy(dirname, name, size);
dirname[size] = 0;
if (slash[1])
basename = slash + 1;
else
basename = conf_get_configname();
} else
basename = name;
} else
basename = conf_get_configname();
sprintf(newname, "%s%s", dirname, basename);
env = getenv("KCONFIG_OVERWRITECONFIG");
if (!env || !*env) {
sprintf(tmpname, "%s.tmpconfig.%d", dirname, (int)getpid());
out = fopen(tmpname, "w");
} else {
*tmpname = 0;
out = fopen(newname, "w");
}
if (!out)
return 1;
sym = sym_lookup("KERNELVERSION", 0);
sym_calc_value(sym);
time(&now);
env = getenv("KCONFIG_NOTIMESTAMP");
if (env && *env)
use_timestamp = 0;
fprintf(out, _("#\n"
"# Automatically generated make config: don't edit\n"
"# Linux kernel version: %s\n"
"%s%s"
"#\n"),
sym_get_string_value(sym),
use_timestamp ? "# " : "",
use_timestamp ? ctime(&now) : "");
if (!conf_get_changed())
sym_clear_all_valid();
menu = rootmenu.list;
while (menu) {
sym = menu->sym;
if (!sym) {
if (!menu_is_visible(menu))
goto next;
str = menu_get_prompt(menu);
fprintf(out, "\n"
"#\n"
"# %s\n"
"#\n", str);
} else if (!(sym->flags & SYMBOL_CHOICE)) {
sym_calc_value(sym);
if (!(sym->flags & SYMBOL_WRITE))
goto next;
sym->flags &= ~SYMBOL_WRITE;
type = sym->type;
if (type == S_TRISTATE) {
sym_calc_value(modules_sym);
if (modules_sym->curr.tri == no)
type = S_BOOLEAN;
}
switch (type) {
case S_BOOLEAN:
case S_TRISTATE:
switch (sym_get_tristate_value(sym)) {
case no:
fprintf(out, "# CONFIG_%s is not set\n", sym->name);
break;
case mod:
fprintf(out, "CONFIG_%s=m\n", sym->name);
break;
case yes:
fprintf(out, "CONFIG_%s=y\n", sym->name);
break;
}
break;
case S_STRING:
str = sym_get_string_value(sym);
fprintf(out, "CONFIG_%s=\"", sym->name);
while (1) {
l = strcspn(str, "\"\\");
if (l) {
fwrite(str, l, 1, out);
str += l;
}
if (!*str)
break;
fprintf(out, "\\%c", *str++);
}
fputs("\"\n", out);
break;
case S_HEX:
str = sym_get_string_value(sym);
if (str[0] != '0' || (str[1] != 'x' && str[1] != 'X')) {
fprintf(out, "CONFIG_%s=%s\n", sym->name, str);
break;
}
case S_INT:
str = sym_get_string_value(sym);
fprintf(out, "CONFIG_%s=%s\n", sym->name, str);
break;
}
}
next:
if (menu->list) {
menu = menu->list;
continue;
}
if (menu->next)
menu = menu->next;
else while ((menu = menu->parent)) {
if (menu->next) {
menu = menu->next;
break;
}
}
}
fclose(out);
if (*tmpname) {
strcat(dirname, basename);
strcat(dirname, ".old");
rename(newname, dirname);
if (rename(tmpname, newname))
return 1;
}
printf(_("#\n"
"# configuration written to %s\n"
"#\n"), newname);
sym_set_change_count(0);
return 0;
}
static int conf_split_config(void)
{
const char *name;
char path[128];
char *s, *d, c;
struct symbol *sym;
struct stat sb;
int res, i, fd;
name = conf_get_autoconfig_name();
conf_read_simple(name, S_DEF_AUTO);
if (chdir("include/config"))
return 1;
res = 0;
for_all_symbols(i, sym) {
sym_calc_value(sym);
if ((sym->flags & SYMBOL_AUTO) || !sym->name)
continue;
if (sym->flags & SYMBOL_WRITE) {
if (sym->flags & SYMBOL_DEF_AUTO) {
/*
* symbol has old and new value,
* so compare them...
*/
switch (sym->type) {
case S_BOOLEAN:
case S_TRISTATE:
if (sym_get_tristate_value(sym) ==
sym->def[S_DEF_AUTO].tri)
continue;
break;
case S_STRING:
case S_HEX:
case S_INT:
if (!strcmp(sym_get_string_value(sym),
sym->def[S_DEF_AUTO].val))
continue;
break;
default:
break;
}
} else {
/*
* If there is no old value, only 'no' (unset)
* is allowed as new value.
*/
switch (sym->type) {
case S_BOOLEAN:
case S_TRISTATE:
if (sym_get_tristate_value(sym) == no)
continue;
break;
default:
break;
}
}
} else if (!(sym->flags & SYMBOL_DEF_AUTO))
/* There is neither an old nor a new value. */
continue;
/* else
* There is an old value, but no new value ('no' (unset)
* isn't saved in auto.conf, so the old value is always
* different from 'no').
*/
/* Replace all '_' and append ".h" */
s = sym->name;
d = path;
while ((c = *s++)) {
c = tolower(c);
*d++ = (c == '_') ? '/' : c;
}
strcpy(d, ".h");
/* Assume directory path already exists. */
fd = open(path, O_WRONLY | O_CREAT | O_TRUNC, 0644);
if (fd == -1) {
if (errno != ENOENT) {
res = 1;
break;
}
/*
* Create directory components,
* unless they exist already.
*/
d = path;
while ((d = strchr(d, '/'))) {
*d = 0;
if (stat(path, &sb) && mkdir(path, 0755)) {
res = 1;
goto out;
}
*d++ = '/';
}
/* Try it again. */
fd = open(path, O_WRONLY | O_CREAT | O_TRUNC, 0644);
if (fd == -1) {
res = 1;
break;
}
}
close(fd);
}
out:
if (chdir("../.."))
return 1;
return res;
}
int conf_write_autoconf(void)
{
struct symbol *sym;
const char *str;
const char *name;
FILE *out, *tristate, *out_h;
time_t now;
int i, l;
sym_clear_all_valid();
file_write_dep("include/config/auto.conf.cmd");
if (conf_split_config())
return 1;
out = fopen(".tmpconfig", "w");
if (!out)
return 1;
tristate = fopen(".tmpconfig_tristate", "w");
if (!tristate) {
fclose(out);
return 1;
}
out_h = fopen(".tmpconfig.h", "w");
if (!out_h) {
fclose(out);
fclose(tristate);
return 1;
}
sym = sym_lookup("KERNELVERSION", 0);
sym_calc_value(sym);
time(&now);
fprintf(out, "#\n"
"# Automatically generated make config: don't edit\n"
"# Linux kernel version: %s\n"
"# %s"
"#\n",
sym_get_string_value(sym), ctime(&now));
fprintf(tristate, "#\n"
"# Automatically generated - do not edit\n"
"\n");
fprintf(out_h, "/*\n"
" * Automatically generated C config: don't edit\n"
" * Linux kernel version: %s\n"
" * %s"
" */\n"
"#define AUTOCONF_INCLUDED\n",
sym_get_string_value(sym), ctime(&now));
for_all_symbols(i, sym) {
sym_calc_value(sym);
if (!(sym->flags & SYMBOL_WRITE) || !sym->name)
continue;
switch (sym->type) {
case S_BOOLEAN:
case S_TRISTATE:
switch (sym_get_tristate_value(sym)) {
case no:
break;
case mod:
fprintf(out, "CONFIG_%s=m\n", sym->name);
fprintf(tristate, "CONFIG_%s=M\n", sym->name);
fprintf(out_h, "#define CONFIG_%s_MODULE 1\n", sym->name);
break;
case yes:
fprintf(out, "CONFIG_%s=y\n", sym->name);
if (sym->type == S_TRISTATE)
fprintf(tristate, "CONFIG_%s=Y\n",
sym->name);
fprintf(out_h, "#define CONFIG_%s 1\n", sym->name);
break;
}
break;
case S_STRING:
str = sym_get_string_value(sym);
fprintf(out, "CONFIG_%s=\"", sym->name);
fprintf(out_h, "#define CONFIG_%s \"", sym->name);
while (1) {
l = strcspn(str, "\"\\");
if (l) {
fwrite(str, l, 1, out);
fwrite(str, l, 1, out_h);
str += l;
}
if (!*str)
break;
fprintf(out, "\\%c", *str);
fprintf(out_h, "\\%c", *str);
str++;
}
fputs("\"\n", out);
fputs("\"\n", out_h);
break;
case S_HEX:
str = sym_get_string_value(sym);
if (str[0] != '0' || (str[1] != 'x' && str[1] != 'X')) {
fprintf(out, "CONFIG_%s=%s\n", sym->name, str);
fprintf(out_h, "#define CONFIG_%s 0x%s\n", sym->name, str);
break;
}
case S_INT:
str = sym_get_string_value(sym);
fprintf(out, "CONFIG_%s=%s\n", sym->name, str);
fprintf(out_h, "#define CONFIG_%s %s\n", sym->name, str);
break;
default:
break;
}
}
fclose(out);
fclose(tristate);
fclose(out_h);
name = getenv("KCONFIG_AUTOHEADER");
if (!name)
name = "include/generated/autoconf.h";
if (rename(".tmpconfig.h", name))
return 1;
name = getenv("KCONFIG_TRISTATE");
if (!name)
name = "include/config/tristate.conf";
if (rename(".tmpconfig_tristate", name))
return 1;
name = conf_get_autoconfig_name();
/*
* This must be the last step, kbuild has a dependency on auto.conf
* and this marks the successful completion of the previous steps.
*/
if (rename(".tmpconfig", name))
return 1;
return 0;
}
static int sym_change_count;
static void (*conf_changed_callback)(void);
void sym_set_change_count(int count)
{
int _sym_change_count = sym_change_count;
sym_change_count = count;
if (conf_changed_callback &&
(bool)_sym_change_count != (bool)count)
conf_changed_callback();
}
void sym_add_change_count(int count)
{
sym_set_change_count(count + sym_change_count);
}
bool conf_get_changed(void)
{
return sym_change_count;
}
void conf_set_changed_callback(void (*fn)(void))
{
conf_changed_callback = fn;
}
void conf_set_all_new_symbols(enum conf_def_mode mode)
{
struct symbol *sym, *csym;
struct property *prop;
struct expr *e;
int i, cnt, def;
for_all_symbols(i, sym) {
if (sym_has_value(sym))
continue;
switch (sym_get_type(sym)) {
case S_BOOLEAN:
case S_TRISTATE:
switch (mode) {
case def_yes:
sym->def[S_DEF_USER].tri = yes;
break;
case def_mod:
sym->def[S_DEF_USER].tri = mod;
break;
case def_no:
sym->def[S_DEF_USER].tri = no;
break;
case def_random:
sym->def[S_DEF_USER].tri = (tristate)(rand() % 3);
break;
default:
continue;
}
if (!(sym_is_choice(sym) && mode == def_random))
sym->flags |= SYMBOL_DEF_USER;
break;
default:
break;
}
}
sym_clear_all_valid();
if (mode != def_random)
return;
/*
* We have different type of choice blocks.
* If curr.tri equal to mod then we can select several
* choice symbols in one block.
* In this case we do nothing.
* If curr.tri equal yes then only one symbol can be
* selected in a choice block and we set it to yes,
* and the rest to no.
*/
for_all_symbols(i, csym) {
if (sym_has_value(csym) || !sym_is_choice(csym))
continue;
sym_calc_value(csym);
if (csym->curr.tri != yes)
continue;
prop = sym_get_choice_prop(csym);
/* count entries in choice block */
cnt = 0;
expr_list_for_each_sym(prop->expr, e, sym)
cnt++;
/*
* find a random value and set it to yes,
* set the rest to no so we have only one set
*/
def = (rand() % cnt);
cnt = 0;
expr_list_for_each_sym(prop->expr, e, sym) {
if (def == cnt++) {
sym->def[S_DEF_USER].tri = yes;
csym->def[S_DEF_USER].val = sym;
}
else {
sym->def[S_DEF_USER].tri = no;
}
}
csym->flags |= SYMBOL_DEF_USER;
/* clear VALID to get value calculated */
csym->flags &= ~(SYMBOL_VALID);
}
}
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