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-rw-r--r--kconfig/menu.c460
1 files changed, 328 insertions, 132 deletions
diff --git a/kconfig/menu.c b/kconfig/menu.c
index 6a65271..a5fbd6c 100644
--- a/kconfig/menu.c
+++ b/kconfig/menu.c
@@ -1,6 +1,6 @@
+// SPDX-License-Identifier: GPL-2.0
/*
* Copyright (C) 2002 Roman Zippel <zippel@linux-m68k.org>
- * Released under the terms of the GNU GPL v2.0.
*/
#include <ctype.h>
@@ -62,15 +62,11 @@ void menu_add_entry(struct symbol *sym)
menu_add_symbol(P_SYMBOL, sym, NULL);
}
-void menu_end_entry(void)
-{
-}
-
struct menu *menu_add_menu(void)
{
- menu_end_entry();
last_entry_ptr = &current_entry->list;
- return current_menu = current_entry;
+ current_menu = current_entry;
+ return current_menu;
}
void menu_end_menu(void)
@@ -79,19 +75,23 @@ void menu_end_menu(void)
current_menu = current_menu->parent;
}
-static struct expr *menu_check_dep(struct expr *e)
+/*
+ * Rewrites 'm' to 'm' && MODULES, so that it evaluates to 'n' when running
+ * without modules
+ */
+static struct expr *rewrite_m(struct expr *e)
{
if (!e)
return e;
switch (e->type) {
case E_NOT:
- e->left.expr = menu_check_dep(e->left.expr);
+ e->left.expr = rewrite_m(e->left.expr);
break;
case E_OR:
case E_AND:
- e->left.expr = menu_check_dep(e->left.expr);
- e->right.expr = menu_check_dep(e->right.expr);
+ e->left.expr = rewrite_m(e->left.expr);
+ e->right.expr = rewrite_m(e->right.expr);
break;
case E_SYMBOL:
/* change 'm' into 'm' && MODULES */
@@ -106,7 +106,7 @@ static struct expr *menu_check_dep(struct expr *e)
void menu_add_dep(struct expr *dep)
{
- current_entry->dep = expr_alloc_and(current_entry->dep, menu_check_dep(dep));
+ current_entry->dep = expr_alloc_and(current_entry->dep, dep);
}
void menu_set_type(int type)
@@ -125,67 +125,76 @@ void menu_set_type(int type)
sym_type_name(sym->type), sym_type_name(type));
}
-static struct property *menu_add_prop(enum prop_type type, char *prompt, struct expr *expr, struct expr *dep)
+static struct property *menu_add_prop(enum prop_type type, struct expr *expr,
+ struct expr *dep)
{
- struct property *prop = prop_alloc(type, current_entry->sym);
+ struct property *prop;
+ prop = xmalloc(sizeof(*prop));
+ memset(prop, 0, sizeof(*prop));
+ prop->type = type;
+ prop->file = current_file;
+ prop->lineno = zconf_lineno();
prop->menu = current_entry;
prop->expr = expr;
- prop->visible.expr = menu_check_dep(dep);
+ prop->visible.expr = dep;
- if (prompt) {
- /* For crostool-NG, a leading pipe followed with spaces
- * means that pipe shall be removed, and the spaces should
- * not be trimmed.
- */
- if (*prompt == '|')
+ /* append property to the prop list of symbol */
+ if (current_entry->sym) {
+ struct property **propp;
+
+ for (propp = &current_entry->sym->prop;
+ *propp;
+ propp = &(*propp)->next)
+ ;
+ *propp = prop;
+ }
+
+ return prop;
+}
+
+struct property *menu_add_prompt(enum prop_type type, char *prompt,
+ struct expr *dep)
+{
+ struct property *prop = menu_add_prop(type, NULL, dep);
+
+ if (isspace(*prompt)) {
+ prop_warn(prop, "leading whitespace ignored");
+ while (isspace(*prompt))
prompt++;
- else if (isspace(*prompt)) {
- prop_warn(prop, "leading whitespace ignored");
- while (isspace(*prompt))
- prompt++;
- }
- if (current_entry->prompt && current_entry != &rootmenu)
- prop_warn(prop, "prompt redefined");
+ }
+ if (current_entry->prompt)
+ prop_warn(prop, "prompt redefined");
- /* Apply all upper menus' visibilities to actual prompts. */
- if(type == P_PROMPT) {
- struct menu *menu = current_entry;
+ /* Apply all upper menus' visibilities to actual prompts. */
+ if (type == P_PROMPT) {
+ struct menu *menu = current_entry;
- while ((menu = menu->parent) != NULL) {
- struct expr *dup_expr;
+ while ((menu = menu->parent) != NULL) {
+ struct expr *dup_expr;
- if (!menu->visibility)
- continue;
- /*
- * Do not add a reference to the
- * menu's visibility expression but
- * use a copy of it. Otherwise the
- * expression reduction functions
- * will modify expressions that have
- * multiple references which can
- * cause unwanted side effects.
- */
- dup_expr = expr_copy(menu->visibility);
+ if (!menu->visibility)
+ continue;
+ /*
+ * Do not add a reference to the menu's visibility
+ * expression but use a copy of it. Otherwise the
+ * expression reduction functions will modify
+ * expressions that have multiple references which
+ * can cause unwanted side effects.
+ */
+ dup_expr = expr_copy(menu->visibility);
- prop->visible.expr
- = expr_alloc_and(prop->visible.expr,
- dup_expr);
- }
+ prop->visible.expr = expr_alloc_and(prop->visible.expr,
+ dup_expr);
}
-
- current_entry->prompt = prop;
}
+
+ current_entry->prompt = prop;
prop->text = prompt;
return prop;
}
-struct property *menu_add_prompt(enum prop_type type, char *prompt, struct expr *dep)
-{
- return menu_add_prop(type, prompt, NULL, dep);
-}
-
void menu_add_visibility(struct expr *expr)
{
current_entry->visibility = expr_alloc_and(current_entry->visibility,
@@ -194,39 +203,34 @@ void menu_add_visibility(struct expr *expr)
void menu_add_expr(enum prop_type type, struct expr *expr, struct expr *dep)
{
- menu_add_prop(type, NULL, expr, dep);
+ menu_add_prop(type, expr, dep);
}
void menu_add_symbol(enum prop_type type, struct symbol *sym, struct expr *dep)
{
- menu_add_prop(type, NULL, expr_alloc_symbol(sym), dep);
+ menu_add_prop(type, expr_alloc_symbol(sym), dep);
}
-void menu_add_option(int token, char *arg)
+void menu_add_option_modules(void)
{
- switch (token) {
- case T_OPT_MODULES:
- if (modules_sym)
- zconf_error("symbol '%s' redefines option 'modules'"
- " already defined by symbol '%s'",
- current_entry->sym->name,
- modules_sym->name
- );
- modules_sym = current_entry->sym;
- break;
- case T_OPT_DEFCONFIG_LIST:
- if (!sym_defconfig_list)
- sym_defconfig_list = current_entry->sym;
- else if (sym_defconfig_list != current_entry->sym)
- zconf_error("trying to redefine defconfig symbol");
- break;
- case T_OPT_ENV:
- prop_add_env(arg);
- break;
- case T_OPT_ALLNOCONFIG_Y:
- current_entry->sym->flags |= SYMBOL_ALLNOCONFIG_Y;
- break;
- }
+ if (modules_sym)
+ zconf_error("symbol '%s' redefines option 'modules' already defined by symbol '%s'",
+ current_entry->sym->name, modules_sym->name);
+ modules_sym = current_entry->sym;
+}
+
+void menu_add_option_defconfig_list(void)
+{
+ if (!sym_defconfig_list)
+ sym_defconfig_list = current_entry->sym;
+ else if (sym_defconfig_list != current_entry->sym)
+ zconf_error("trying to redefine defconfig symbol");
+ sym_defconfig_list->flags |= SYMBOL_NO_WRITE;
+}
+
+void menu_add_option_allnoconfig_y(void)
+{
+ current_entry->sym->flags |= SYMBOL_ALLNOCONFIG_Y;
}
static int menu_validate_number(struct symbol *sym, struct symbol *sym2)
@@ -239,6 +243,8 @@ static void sym_check_prop(struct symbol *sym)
{
struct property *prop;
struct symbol *sym2;
+ char *use;
+
for (prop = sym->prop; prop; prop = prop->next) {
switch (prop->type) {
case P_DEFAULT:
@@ -256,20 +262,32 @@ static void sym_check_prop(struct symbol *sym)
"'%s': number is invalid",
sym->name);
}
+ if (sym_is_choice(sym)) {
+ struct property *choice_prop =
+ sym_get_choice_prop(sym2);
+
+ if (!choice_prop ||
+ prop_get_symbol(choice_prop) != sym)
+ prop_warn(prop,
+ "choice default symbol '%s' is not contained in the choice",
+ sym2->name);
+ }
break;
case P_SELECT:
+ case P_IMPLY:
+ use = prop->type == P_SELECT ? "select" : "imply";
sym2 = prop_get_symbol(prop);
if (sym->type != S_BOOLEAN && sym->type != S_TRISTATE)
prop_warn(prop,
- "config symbol '%s' uses select, but is "
- "not boolean or tristate", sym->name);
+ "config symbol '%s' uses %s, but is "
+ "not bool or tristate", sym->name, use);
else if (sym2->type != S_UNKNOWN &&
sym2->type != S_BOOLEAN &&
sym2->type != S_TRISTATE)
prop_warn(prop,
- "'%s' has wrong type. 'select' only "
- "accept arguments of boolean and "
- "tristate type", sym2->name);
+ "'%s' has wrong type. '%s' only "
+ "accept arguments of bool and "
+ "tristate type", sym2->name, use);
break;
case P_RANGE:
if (sym->type != S_INT && sym->type != S_HEX)
@@ -294,6 +312,11 @@ void menu_finalize(struct menu *parent)
sym = parent->sym;
if (parent->list) {
+ /*
+ * This menu node has children. We (recursively) process them
+ * and propagate parent dependencies before moving on.
+ */
+
if (sym && sym_is_choice(sym)) {
if (sym->type == S_UNKNOWN) {
/* find the first choice value to find out choice type */
@@ -311,65 +334,167 @@ void menu_finalize(struct menu *parent)
if (menu->sym && menu->sym->type == S_UNKNOWN)
menu_set_type(sym->type);
}
+
+ /*
+ * Use the choice itself as the parent dependency of
+ * the contained items. This turns the mode of the
+ * choice into an upper bound on the visibility of the
+ * choice value symbols.
+ */
parentdep = expr_alloc_symbol(sym);
- } else if (parent->prompt)
- parentdep = parent->prompt->visible.expr;
- else
+ } else {
+ /* Menu node for 'menu', 'if' */
parentdep = parent->dep;
+ }
+ /* For each child menu node... */
for (menu = parent->list; menu; menu = menu->next) {
- basedep = expr_transform(menu->dep);
+ /*
+ * Propagate parent dependencies to the child menu
+ * node, also rewriting and simplifying expressions
+ */
+ basedep = rewrite_m(menu->dep);
+ basedep = expr_transform(basedep);
basedep = expr_alloc_and(expr_copy(parentdep), basedep);
basedep = expr_eliminate_dups(basedep);
menu->dep = basedep;
+
if (menu->sym)
+ /*
+ * Note: For symbols, all prompts are included
+ * too in the symbol's own property list
+ */
prop = menu->sym->prop;
else
+ /*
+ * For non-symbol menu nodes, we just need to
+ * handle the prompt
+ */
prop = menu->prompt;
+
+ /* For each property... */
for (; prop; prop = prop->next) {
if (prop->menu != menu)
+ /*
+ * Two possibilities:
+ *
+ * 1. The property lacks dependencies
+ * and so isn't location-specific,
+ * e.g. an 'option'
+ *
+ * 2. The property belongs to a symbol
+ * defined in multiple locations and
+ * is from some other location. It
+ * will be handled there in that
+ * case.
+ *
+ * Skip the property.
+ */
continue;
- dep = expr_transform(prop->visible.expr);
+
+ /*
+ * Propagate parent dependencies to the
+ * property's condition, rewriting and
+ * simplifying expressions at the same time
+ */
+ dep = rewrite_m(prop->visible.expr);
+ dep = expr_transform(dep);
dep = expr_alloc_and(expr_copy(basedep), dep);
dep = expr_eliminate_dups(dep);
if (menu->sym && menu->sym->type != S_TRISTATE)
dep = expr_trans_bool(dep);
prop->visible.expr = dep;
+
+ /*
+ * Handle selects and implies, which modify the
+ * dependencies of the selected/implied symbol
+ */
if (prop->type == P_SELECT) {
struct symbol *es = prop_get_symbol(prop);
es->rev_dep.expr = expr_alloc_or(es->rev_dep.expr,
expr_alloc_and(expr_alloc_symbol(menu->sym), expr_copy(dep)));
+ } else if (prop->type == P_IMPLY) {
+ struct symbol *es = prop_get_symbol(prop);
+ es->implied.expr = expr_alloc_or(es->implied.expr,
+ expr_alloc_and(expr_alloc_symbol(menu->sym), expr_copy(dep)));
}
}
}
+
+ if (sym && sym_is_choice(sym))
+ expr_free(parentdep);
+
+ /*
+ * Recursively process children in the same fashion before
+ * moving on
+ */
for (menu = parent->list; menu; menu = menu->next)
menu_finalize(menu);
} else if (sym) {
+ /*
+ * Automatic submenu creation. If sym is a symbol and A, B, C,
+ * ... are consecutive items (symbols, menus, ifs, etc.) that
+ * all depend on sym, then the following menu structure is
+ * created:
+ *
+ * sym
+ * +-A
+ * +-B
+ * +-C
+ * ...
+ *
+ * This also works recursively, giving the following structure
+ * if A is a symbol and B depends on A:
+ *
+ * sym
+ * +-A
+ * | +-B
+ * +-C
+ * ...
+ */
+
basedep = parent->prompt ? parent->prompt->visible.expr : NULL;
basedep = expr_trans_compare(basedep, E_UNEQUAL, &symbol_no);
basedep = expr_eliminate_dups(expr_transform(basedep));
+
+ /* Examine consecutive elements after sym */
last_menu = NULL;
for (menu = parent->next; menu; menu = menu->next) {
dep = menu->prompt ? menu->prompt->visible.expr : menu->dep;
if (!expr_contains_symbol(dep, sym))
+ /* No dependency, quit */
break;
if (expr_depends_symbol(dep, sym))
+ /* Absolute dependency, put in submenu */
goto next;
+
+ /*
+ * Also consider it a dependency on sym if our
+ * dependencies contain sym and are a "superset" of
+ * sym's dependencies, e.g. '(sym || Q) && R' when sym
+ * depends on R.
+ *
+ * Note that 'R' might be from an enclosing menu or if,
+ * making this a more common case than it might seem.
+ */
dep = expr_trans_compare(dep, E_UNEQUAL, &symbol_no);
dep = expr_eliminate_dups(expr_transform(dep));
dep2 = expr_copy(basedep);
expr_eliminate_eq(&dep, &dep2);
expr_free(dep);
if (!expr_is_yes(dep2)) {
+ /* Not superset, quit */
expr_free(dep2);
break;
}
+ /* Superset, put in submenu */
expr_free(dep2);
next:
menu_finalize(menu);
menu->parent = parent;
last_menu = menu;
}
+ expr_free(basedep);
if (last_menu) {
parent->list = parent->next;
parent->next = last_menu->next;
@@ -418,6 +543,35 @@ void menu_finalize(struct menu *parent)
*ep = expr_alloc_one(E_LIST, NULL);
(*ep)->right.sym = menu->sym;
}
+
+ /*
+ * This code serves two purposes:
+ *
+ * (1) Flattening 'if' blocks, which do not specify a submenu
+ * and only add dependencies.
+ *
+ * (Automatic submenu creation might still create a submenu
+ * from an 'if' before this code runs.)
+ *
+ * (2) "Undoing" any automatic submenus created earlier below
+ * promptless symbols.
+ *
+ * Before:
+ *
+ * A
+ * if ... (or promptless symbol)
+ * +-B
+ * +-C
+ * D
+ *
+ * After:
+ *
+ * A
+ * if ... (or promptless symbol)
+ * B
+ * C
+ * D
+ */
if (menu->list && (!menu->prompt || !menu->prompt->text)) {
for (last_menu = menu->list; ; last_menu = last_menu->next) {
last_menu->parent = parent;
@@ -442,6 +596,15 @@ void menu_finalize(struct menu *parent)
sym->flags |= SYMBOL_WARNED;
}
+ /*
+ * For non-optional choices, add a reverse dependency (corresponding to
+ * a select) of '<visibility> && m'. This prevents the user from
+ * setting the choice mode to 'n' when the choice is visible.
+ *
+ * This would also work for non-choice symbols, but only non-optional
+ * choices clear SYMBOL_OPTIONAL as of writing. Choices are implemented
+ * as a type of symbol.
+ */
if (sym && !sym_is_optional(sym) && parent->prompt) {
sym->rev_dep.expr = expr_alloc_or(sym->rev_dep.expr,
expr_alloc_and(parent->prompt->visible.expr,
@@ -483,7 +646,7 @@ bool menu_is_visible(struct menu *menu)
if (menu->visibility) {
if (expr_calc_value(menu->visibility) == no)
- return no;
+ return false;
}
sym = menu->sym;
@@ -549,6 +712,21 @@ const char *menu_get_help(struct menu *menu)
return "";
}
+static void get_def_str(struct gstr *r, struct menu *menu)
+{
+ str_printf(r, "Defined at %s:%d\n",
+ menu->file->name, menu->lineno);
+}
+
+static void get_dep_str(struct gstr *r, struct expr *expr, const char *prefix)
+{
+ if (!expr_is_yes(expr)) {
+ str_append(r, prefix);
+ expr_gstr_print(expr, r);
+ str_append(r, "\n");
+ }
+}
+
static void get_prompt_str(struct gstr *r, struct property *prop,
struct list_head *head)
{
@@ -556,7 +734,20 @@ static void get_prompt_str(struct gstr *r, struct property *prop,
struct menu *submenu[8], *menu, *location = NULL;
struct jump_key *jump = NULL;
- str_printf(r, _("Prompt: %s\n"), _(prop->text));
+ str_printf(r, " Prompt: %s\n", prop->text);
+
+ get_dep_str(r, prop->menu->dep, " Depends on: ");
+ /*
+ * Most prompts in Linux have visibility that exactly matches their
+ * dependencies. For these, we print only the dependencies to improve
+ * readability. However, prompts with inline "if" expressions and
+ * prompts with a parent that has a "visible if" expression have
+ * differing dependencies and visibility. In these rare cases, we
+ * print both.
+ */
+ if (!expr_eq(prop->menu->dep, prop->visible.expr))
+ get_dep_str(r, prop->visible.expr, " Visible if: ");
+
menu = prop->menu->parent;
for (i = 0; menu != &rootmenu && i < 8; menu = menu->parent) {
bool accessible = menu_is_visible(menu);
@@ -589,16 +780,16 @@ static void get_prompt_str(struct gstr *r, struct property *prop,
}
if (i > 0) {
- str_printf(r, _(" Location:\n"));
+ str_printf(r, " Location:\n");
for (j = 4; --i >= 0; j += 2) {
menu = submenu[i];
if (jump && menu == location)
jump->offset = strlen(r->s);
str_printf(r, "%*c-> %s", j, ' ',
- _(menu_get_prompt(menu)));
+ menu_get_prompt(menu));
if (menu->sym) {
str_printf(r, " (%s [=%s])", menu->sym->name ?
- menu->sym->name : _("<choice>"),
+ menu->sym->name : "<choice>",
sym_get_string_value(menu->sym));
}
str_append(r, "\n");
@@ -606,16 +797,22 @@ static void get_prompt_str(struct gstr *r, struct property *prop,
}
}
-/*
- * get property of type P_SYMBOL
- */
-static struct property *get_symbol_prop(struct symbol *sym)
+static void get_symbol_props_str(struct gstr *r, struct symbol *sym,
+ enum prop_type tok, const char *prefix)
{
- struct property *prop = NULL;
+ bool hit = false;
+ struct property *prop;
- for_all_properties(sym, prop, P_SYMBOL)
- break;
- return prop;
+ for_all_properties(sym, prop, tok) {
+ if (!hit) {
+ str_append(r, prefix);
+ hit = true;
+ } else
+ str_printf(r, " && ");
+ expr_gstr_print(prop->expr, r);
+ }
+ if (hit)
+ str_append(r, "\n");
}
/*
@@ -624,7 +821,6 @@ static struct property *get_symbol_prop(struct symbol *sym)
static void get_symbol_str(struct gstr *r, struct symbol *sym,
struct list_head *head)
{
- bool hit;
struct property *prop;
if (sym && sym->name) {
@@ -640,36 +836,36 @@ static void get_symbol_str(struct gstr *r, struct symbol *sym,
}
}
}
- for_all_prompts(sym, prop)
- get_prompt_str(r, prop, head);
-
- prop = get_symbol_prop(sym);
- if (prop) {
- str_printf(r, _(" Defined at %s:%d\n"), prop->menu->file->name,
- prop->menu->lineno);
- if (!expr_is_yes(prop->visible.expr)) {
- str_append(r, _(" Depends on: "));
- expr_gstr_print(prop->visible.expr, r);
- str_append(r, "\n");
+
+ /* Print the definitions with prompts before the ones without */
+ for_all_properties(sym, prop, P_SYMBOL) {
+ if (prop->menu->prompt) {
+ get_def_str(r, prop->menu);
+ get_prompt_str(r, prop->menu->prompt, head);
}
}
- hit = false;
- for_all_properties(sym, prop, P_SELECT) {
- if (!hit) {
- str_append(r, " Selects: ");
- hit = true;
- } else
- str_printf(r, " && ");
- expr_gstr_print(prop->expr, r);
+ for_all_properties(sym, prop, P_SYMBOL) {
+ if (!prop->menu->prompt) {
+ get_def_str(r, prop->menu);
+ get_dep_str(r, prop->menu->dep, " Depends on: ");
+ }
}
- if (hit)
- str_append(r, "\n");
+
+ get_symbol_props_str(r, sym, P_SELECT, "Selects: ");
if (sym->rev_dep.expr) {
- str_append(r, _(" Selected by: "));
- expr_gstr_print(sym->rev_dep.expr, r);
- str_append(r, "\n");
+ expr_gstr_print_revdep(sym->rev_dep.expr, r, yes, "Selected by [y]:\n");
+ expr_gstr_print_revdep(sym->rev_dep.expr, r, mod, "Selected by [m]:\n");
+ expr_gstr_print_revdep(sym->rev_dep.expr, r, no, "Selected by [n]:\n");
}
+
+ get_symbol_props_str(r, sym, P_IMPLY, "Implies: ");
+ if (sym->implied.expr) {
+ expr_gstr_print_revdep(sym->implied.expr, r, yes, "Implied by [y]:\n");
+ expr_gstr_print_revdep(sym->implied.expr, r, mod, "Implied by [m]:\n");
+ expr_gstr_print_revdep(sym->implied.expr, r, no, "Implied by [n]:\n");
+ }
+
str_append(r, "\n\n");
}
@@ -682,7 +878,7 @@ struct gstr get_relations_str(struct symbol **sym_arr, struct list_head *head)
for (i = 0; sym_arr && (sym = sym_arr[i]); i++)
get_symbol_str(&res, sym, head);
if (!i)
- str_append(&res, _("No matches found.\n"));
+ str_append(&res, "No matches found.\n");
return res;
}
@@ -697,7 +893,7 @@ void menu_get_ext_help(struct menu *menu, struct gstr *help)
str_printf(help, "%s%s:\n\n", CONFIG_, sym->name);
help_text = menu_get_help(menu);
}
- str_printf(help, "%s\n", _(help_text));
+ str_printf(help, "%s\n", help_text);
if (sym)
get_symbol_str(help, sym, NULL);
}